JP5029165B2 - refrigerator - Google Patents

Description

  The present invention relates to a refrigerator provided with an atomizing device for humidifying a storage room space for storing vegetables and the like.

  Factors that affect the decline in freshness of vegetables include temperature, humidity, environmental gas, microorganisms, and light. Vegetables are living things, and respiration and transpiration are performed on the surface of the vegetables. To maintain freshness, it is necessary to suppress respiration and transpiration. Except for some vegetables that cause low-temperature injury, many vegetables have low respiration at low temperatures and can prevent transpiration due to high humidity. In recent years, refrigerators for home use have a sealed vegetable container for the purpose of preserving vegetables, cooling the vegetables to an appropriate temperature, and controlling the transpiration of the vegetables, such as increasing the humidity in the cabinet. ing. Here, there exists what sprays mist as a humidification means in a store | warehouse | chamber.

  Conventionally, refrigerators equipped with this kind of mist spraying function are those that produce and spray mist with an ultrasonic atomizer when the vegetable compartment is low in humidity, humidify the vegetable compartment, and suppress transpiration of vegetables (for example, Patent Document 1).

  FIG. 10 shows a refrigerator provided with a conventional ultrasonic atomizer described in Patent Document 1. FIG. 11 is an enlarged perspective view showing a main part of the ultrasonic atomizer.

  As shown in FIG. 10, the vegetable compartment 21 is provided in the lower part of the main body case 26 of the refrigerator main body 20, and the front opening is closed by the drawer door 22 pulled out so that opening and closing is possible. Moreover, the vegetable compartment 21 is partitioned off from the upper refrigerator compartment (not shown) by the partition plate 2.

  A fixed hanger 23 is fixed to the inner surface of the drawer door 22, and the vegetable container 1 for storing food such as vegetables is mounted on the fixed hanger 23. The top opening of the vegetable container 1 is sealed with a lid 3. A thawing chamber 4 is provided inside the vegetable container 1, and an ultrasonic atomizer 5 is provided in the thawing chamber 4.

  As shown in FIG. 11, the ultrasonic atomizer 5 includes a mist outlet 6, a water storage container 7, a humidity sensor 8, and a hose receiver 9. The water storage container 7 is connected to a defrost water hose 10 by a hose receiver 9. The defrost water hose 10 is provided with a purification filter 11 for purifying the defrost water at a part thereof.

  The operation of the refrigerator configured as described above will be described below.

  Cooling air cooled by a heat exchange cooler (not shown) flows through the outer surfaces of the vegetable container 1 and the lid 3, whereby the vegetable container 1 is cooled and the food stored therein is cooled. Further, the defrost water generated from the cooler during the refrigerator operation is purified by the purification filter 11 when passing through the defrost water hose 10 and supplied to the water storage container 7 of the ultrasonic atomizer 5.

  Next, when the humidity sensor 8 detects that the internal humidity is 90% or less, the ultrasonic atomizing device 5 starts humidification, so that the humidity in the vegetable container 1 is kept at a suitable level. Humidity can be adjusted.

  On the other hand, when the humidity sensor 8 detects that the internal humidity is 90% or more, the ultrasonic atomizer 5 stops excessive humidification. As a result, the ultrasonic atomizer 5 can quickly humidify the vegetable compartment, the humidity in the vegetable compartment is always high, the transpiration action of the vegetable or the like is suppressed, and the freshness of the vegetable or the like can be maintained.

  Moreover, as a method of supplying water to the ultrasonic atomizer, there is one configured in another form (for example, see Patent Document 2). FIG. 12: is a longitudinal cross-sectional view which shows the structure of the vegetable room periphery of the refrigerator of a prior art example. As shown in FIG. 12, the main body 20 of the refrigerator is formed of a heat insulating box, and a drawer-type vegetable compartment 21 is provided in an intermediate portion in the vertical direction in the main body 20. Above the vegetable compartment 21 in the main body 20, a refrigerated compartment 33 (only a part of which is shown) is disposed via a partition plate 34. The vegetable compartment 21 is configured to be slightly hotter and higher in humidity than the refrigerator compartment 33. Also, below the vegetable compartment 21 in the main body 20, an ice making chamber 36 (only part of which is shown) and a temperature switching chamber (not shown) are arranged side by side through a heat insulating partition wall 35, and further below that. A freezer compartment (not shown) is provided.

  The ice making room 36, the temperature switching room, and the freezing room are, for example, drawer-type storage rooms. The front opening of the refrigerating chamber 33 is configured to be opened and closed by a refrigerating chamber door 33 a that is rotatably provided on the main body 20. In the case of the above configuration, the space above the heat insulating partition wall 35 in the main body 20 (that is, the refrigerator compartment 33 and the vegetable compartment 21) is a refrigerator space, and the space below the heat insulating partition wall 35 (that is, the ice making chamber 36). And a freezing room) is a freezing space.

  The refrigeration space is configured to be cooled and controlled so as to be maintained at a set temperature by circulating cold air through a refrigeration cooler 37, a fan (not shown), and a duct disposed on the back surface. Further, the refrigeration space is configured to be cooled and controlled to be maintained at a set temperature by circulating cold air through a refrigeration cooler, a fan, and a duct (all not shown) disposed on the back surface. Yes. Furthermore, a machine room (not shown) is provided in the lowermost back part of the main body 20, and a compressor, a radiator, and the like are disposed in the machine room.

  Now, in the vegetable compartment 21, the vegetable container 1 which accommodates vegetables is arrange | positioned so that drawing is possible.

  The vegetable container 1 is detachably attached to the vegetable compartment door 22a, and is configured to move integrally with the vegetable compartment door 22a. A lid 39 that covers the upper surface opening of the vegetable container 1 (i.e., the vegetable compartment 21) is provided in the upper part of the vegetable compartment 21. The lid 39 is configured so as to make the inside of the vegetable container 1 semi-sealed by covering the top opening of the vegetable container 1 when the opening of the vegetable compartment 21 is closed by the vegetable compartment door 22a. Has been.

  The lid 39 is made of a metal plate such as an aluminum plate, for example, and is formed in a shallow rectangular container shape upside down. As shown in FIG. 13, the bottom wall portion (upper surface wall portion) 40 of the lid 39 is formed with a convex portion (also referred to as a concave portion) 41 that protrudes downward as a whole. The deepest part 41a is provided at a position close to the left end side in FIG. 12 (lower end side in FIG. 13A). The convex portion 41 is formed with four planar inclined surface portions 41b, 41c, 41d, and 41e so as to be continuous with the disk-like deepest portion 41a.

  And the ultrasonic atomizer 42 is arrange | positioned at the lower surface of the deepest part 41a of the cover body 39, as shown in FIG.12 and FIG.14. The ultrasonic atomizer 42 includes a water storage tank 43, a water supply core 44, an ultrasonic transducer 45, and a spring 46. The water storage tank 43 is formed in a shallow circular container shape, and three attachment ribs 47 are provided radially and equidistantly from the central portion in the upper surface opening. One end of each of the three mounting ribs 47 is connected at the center, and the other end is connected to the opening edge of the water storage tank 43.

  As shown in FIG. 15, two engaging claws 47 a and 47 a protrude from the connecting portion at each end of the three mounting ribs 47. By engaging these engaging claws 47a and 47a with an engaging hole formed in the deepest portion 41a of the convex portion 41 of the lid 39 (see FIG. 14), the ultrasonic atomizer 42 is attached to the lid 39. It is attached. In the case of this configuration, the size (diameter) of the water storage tank 43 is configured to be larger than the size (diameter) of the deepest portion 41 a of the convex portion 41 of the lid 39.

  The water supply core 44 is formed of a rod-like felt fiber, is provided so as to penetrate the center of the bottom of the water storage tank 43, and the upper part thereof is immersed in the water in the water storage tank 43. On the lower end surface of the water supply core 44, the ultrasonic transducer 45 is held by a spring 46 so as to always contact the water supply core 44. The ultrasonic vibrator 45 is a disk-type vibrator formed by forming a corrosion-resistant electrode made of nickel or stainless steel on a piezoelectric element such as lead zirconate titanate or barium titanate. The ultrasonic vibrator 45 is configured to generate mist-like water fine particles having a particle size of, for example, about 5 μm on the smooth surface of the ultrasonic vibrator 45 by increasing the vibration frequency.

  And the mist-like water | moisture-content microparticles | fine-particles produced | generated on the smooth surface of the ultrasonic transducer | vibrator 45 are comprised in the vegetable container 1 so that the inside of the vegetable container 1 may be hold | maintained in a high-humidity atmosphere. ing. A control circuit 48 that controls energization of the ultrasonic transducer 45 is disposed at the rear of the upper surface of the lid 39 (see FIG. 12).

  In the case of the above configuration, a humidity sensor (not shown) for detecting the humidity in the vegetable container 1 is provided, and the ultrasonic atomizer 42 is energized when the humidity detected by this humidity gland difference is lower than the set value. It is preferable to configure as described above. The humidity sensor may be configured to be provided on the inner surface of the lid 39, for example.

  Next, the operation of the above configuration, that is, the operation of supplying water to the water storage tank 43 of the ultrasonic atomizer 42 will be described. The vegetable compartment 21, that is, the outside of the vegetable container 1 and the lid 39 is cooled by circulating cold air. And since the vegetable is accommodated in the inside of the vegetable container 1 and the cover body 39, and mist is supplied by the ultrasonic atomizer 42, this inside becomes the atmosphere of high humidity. For this reason, condensation occurs on the inner surface of the lid 39 made of a metal plate.

  The dew condensation, that is, water droplets move downward along the inclined surface portions 41b, 41c, 41d, and 41e of the convex portion 41 of the lid body 39 and reach the lower surface of the deepest portion 41a of the convex portion 41. It drops into the water storage tank 43 of the sonic atomizer 42. Thereby, moisture condensed on the inner surface portions (inclined surface portions 41b, 41c, 41d, 41e) of the lid body 39 is guided and stored in the water storage tank 43 of the ultrasonic atomizer 42. That is, water is supplied into the water storage tank 43.

  In addition, the water in the water storage tank 43 is impregnated in the water supply core 44 and is also misted by the vibration of the ultrasonic vibrator 45 and supplied into the vegetable container 1. Thereby, the inside of the vegetable container 1 is kept at high humidity. In addition, it is known from the usage record (experiments, tests, etc.) of the refrigerator that the amount of water used in the water storage tank 43 by the ultrasonic atomizer 42 is about 7 ml per day.

  Further, the stored vegetables are sequentially taken out from the vegetable container 1, and new fresh vegetables are sequentially stored in the vegetable container 1. Therefore, it is possible to sufficiently replenish water in the water storage tank 43 of the mist generating device 42 with moisture condensed on the lid 39. In this embodiment, the water supply device for supplying water to the water storage tank 43 of the ultrasonic atomizer 42, that is, the water supply tank and the water supply pump are not provided, but these water supply tank and the water supply pump are provided in the refrigerator compartment. The water in the water supply tank may be supplied to the water storage tank 43 of the ultrasonic atomizer 42 via a water supply hose by a water supply pump.

In such a configuration, the ultrasonic atomizer 42 is disposed below the inclined surface portions 41b, 41c, 41d, 41e of the lid 39 of the vegetable compartment 21, and condensation is formed on the inclined surface portions 41b, 41c, 41d, 41e. The water was introduced into the water storage tank 43 of the ultrasonic atomizer 42. For this reason, moisture generated from the vegetables stored in the vegetable compartment 21 can be condensed and put into the water storage tank 43 of the ultrasonic atomizer 42 to supply water permanently, so water supply work is unnecessary. Can be.
JP-A-6-257933 JP 2006-162195 A

  However, in the conventional configuration described above, it is necessary for the water storage tank to take into account humidity inflow into the vegetable room in a half-door state due to environmental temperature and humidity changes throughout the year, door opening and closing during the rainy season, food replacement, and food biting. Condensed water exceeding the amount of moisture was collected, the water storage tank became full or more, water spilled from the water storage tank, watering food and vegetables, and the quality of the product was reduced.

  Furthermore, water level management is important in ultrasonic atomizers. When the amount of water in the tank increases and the water level increases, the input required for atomization increases, and when the water level rises further, there is insufficient energy to vibrate the liquid level. It had the subject of reducing atomization efficiency, such as the amount of formation decreasing.

  The present invention solves the above-described conventional problems, and when a refrigerator having an atomizer is provided with drainage means, when water flows into the reservoir more than necessary, only excess can be easily drained outside the storage room. An object of the present invention is to provide a refrigerator equipped with an atomizing device that can prevent water from entering the storage room and improve the quality in the storage.

In order to solve the above-described conventional problems, a refrigerator according to the present invention includes a storage compartment that is a relatively high-humidity environment that is thermally insulated, an atomization device that sprays liquid into the storage chamber, and a liquid that is applied to the atomization device A water supply means for supplying water , a spray port provided in the atomization device, and a drainage means for draining excess water whose water supply amount to the atomization device is excessive to the outside of the storage chamber. The drainage means is located in front of the spray port, and the spray port is also used as a drain port .

  As a result, when water flows into the water storage unit more than necessary, only the surplus is drained outside the refrigerator, and the water required for spraying can be secured in the water storage unit, and at the same time, it prevents water from entering the storage room In this way, the quality in the warehouse can be improved.

  The refrigerator of the present invention is provided with a drainage structure in the atomizer unit and the refrigerator, and when water flows into the water storage unit more than necessary, only excess is drained out of the refrigerator, thereby preventing the storage room from being splashed. By preventing this, it is possible to improve storage stability and provide an easy-to-use refrigerator.

The invention according to claim 1 is a storage chamber partitioned by heat insulation, an atomization device for spraying liquid into the storage chamber, water supply means for supplying liquid to the atomization device, and the fog A spray port provided in the spraying device, and a drainage means for draining excess water whose water supply amount to the atomization device is excessive to the outside of the storage chamber, the drainage means being located in front of the spray port The spray port is also used as a drain port .

As a result, surplus water that has become excessively supplied to the atomizer can be drained to the outside of the storage room, and after ensuring the spray water to humidify the inside of the storage room, the excess water spills into the storage room. It is possible to provide a refrigerator with improved freshness, which can prevent quality deterioration due to food, and without providing a drain outlet separately from the spray outlet, In addition, since the mist that becomes heavy due to the large particles can be actively collected by the drainage means, it is possible to reduce the diameter of the mist sprayed in the storage chamber. Diffusivity improvement and prevention of condensation.

  Invention of Claim 2 is equipped with the cooler for cooling each room | chamber of a refrigerator in addition to the refrigerator of invention of Claim 1, and drainage means defrost generated when a cooler defrosts It has a drainage path through a drain pan for collecting water.

  Thereby, since it is not necessary to provide a dedicated pipeline outside the warehouse, the component configuration is simplified and resource saving can be achieved. In addition, since a dedicated conduit outside the storage is not provided, an increase in the amount of warm air entering the storage can be prevented, and energy saving can be further achieved.

  In addition to the invention described in claim 1 or 2, the invention described in claim 3 includes, on the inner surface of the storage chamber, an air passage and a blow-out port for introducing cold air generated by the cooler into the storage chamber, and storage. A partition wall provided with a return air passage and a suction port for circulating air exchanged in the chamber to the cooler is provided, and an atomizing device is integrally formed in a part of the partition wall.

  As a result, the atomization device can be installed in the gap between the storage container on the back side of the cabinet and the partition wall on the back side, so that the amount of storage in the cabinet is not affected, and the drainage path can be shortened. It becomes possible to drain the water. In addition, it is possible to prevent food from hitting the atomizing device when food is added, so that there is a failure or malfunction due to impact force from the outside of the atomizing device and adhesion of impurities to the atomizing device due to food hitting. Therefore, the reliability of the atomization device can be further improved.

  Furthermore, since the partition wall and the atomization device are integrated, the atomization device can be attached to the partition wall before attaching the partition wall to the refrigerator, and the positioning accuracy of the atomization device with respect to the partition wall is further increased. Simplification of worker assembly and reduction of assembly man-hours.

  According to a fourth aspect of the present invention, in addition to the third aspect of the invention, the atomizing device has a water supply port, a spray port, and a drain port communicating with the drainage means, and the drain port is a return of the partition wall. It is installed near the wind path.

  As a result, the drain port can be provided in the partition wall having a relatively high temperature, and the drain port part can be prevented from freezing, and surplus water can be reliably flowed to the drain channel.

  In addition to the invention according to any one of claims 1 to 4, the drainage means of the drainage means is provided in the heat insulating material constituting the outer shell of the refrigerator main body or the storage chamber. It is a buried pipeline.

  This makes it possible to insulate the pipe line using the heat insulating material that forms the outer shell of the storage room. With a simple structure, the pipe line can be prevented from freezing by cooling from a cooler, a freezing air duct, etc. Since it is possible to prevent clogging of the pipe line due to the growth of the liquid, it is possible to further improve the reliability of the drainage means.

  According to a sixth aspect of the present invention, the drainage path provided in the drainage means according to any one of the first to fourth aspects is provided with a return air path for circulating cold air from the storage chamber to the cooler. It is what you use.

  As a result, the pipe can be prevented from freezing and the excess water can be drained without using a dedicated pipe, and without using a heating means for temperature compensation such as a heat insulating material or a heater. It is possible to provide drainage means that is resource-saving and highly reliable.

  In addition to the invention described in claim 6, the surface of the return air passage for circulating cool air from the storage chamber, which is a drainage path provided in the drainage means, to the cooler is made of resin. It is configured.

  As a result, it is possible to suppress the outflow of moisture from the air passage to the heat insulating material and the like, and it is possible to prevent material deterioration due to water content of the polystyrene foam material mainly used for heat insulation in the air passage. The reliability of the refrigerator can be improved.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. The same reference numerals are given to the same configurations as those of the conventional example or the embodiments described above, and detailed descriptions thereof will be omitted. The present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a refrigerator according to Embodiment 1 of the present invention. FIG. 2 is a front view of the vicinity of the vegetable compartment of the refrigerator in the first embodiment of the present invention. FIG. 3 is a detailed cross-sectional view of the vicinity of the vegetable compartment of the refrigerator in the first embodiment of the present invention.

  In the figure, a heat insulating box 101 of a refrigerator 100 is mainly composed of an outer box 102 using a steel plate and an inner box 103 molded from a resin such as ABS, and inside thereof is a foam heat insulating material 101a such as hard foam urethane. Is filled, insulated from the surroundings, and divided into a plurality of storage rooms. A refrigeration chamber 104 as a first storage chamber is provided at the top, and a switching chamber 105 as a fourth storage chamber and an ice making chamber 106 as a fifth storage chamber are provided side by side below the refrigeration chamber 104. A vegetable room 107 as a second storage room is arranged below the chamber 105 and the ice making room 106, and a freezing room 108 as a third storage room is arranged at the bottom.

  The refrigerated room 104 is normally set to 1 ° C. to 5 ° C. at the lower limit of the temperature at which it is not frozen for refrigerated storage, and the vegetable room 107 is set to 2 ° C. to 7 ° C., which is set at a temperature that is the same or slightly higher than that of the refrigerated room 104. The freezer compartment 108 is set in a freezing temperature zone, and is usually set at −22 ° C. to −15 ° C. for frozen storage, but for example, −30 ° C. or −25 ° C. to improve the frozen storage state. It may be set at a low temperature. The switching chamber 105 is not only refrigerated set at 1 ° C to 5 ° C, vegetable set at 2 ° C to 7 ° C, and frozen at a temperature set at -22 ° C to -15 ° C. It is possible to switch to a preset temperature range between the freezing temperature ranges. The switching chamber 105 is a storage chamber provided with an independent door arranged in parallel with the ice making chamber 106, and is often provided with a drawer-type door. In this embodiment, the switching chamber 105 is a storage room including the refrigeration and freezing temperature zones, but the refrigeration is performed in the refrigeration room 104, the vegetable room 107, and the freezing is performed in the freezing room 108. A storage room specialized for switching only the intermediate temperature range may be used. A storage room fixed at a specific temperature range may also be used. The ice making chamber 106 creates ice with an automatic ice maker (not shown) provided in the upper part of the room with water sent from a water storage tank (not shown) in the refrigerated room 104, and an ice storage container ( (Not shown).

  The top surface portion of the heat insulating box 101 has a stepped recess shape toward the back side of the refrigerator. The compressor chamber 109 and a dryer for removing moisture are formed by forming a machine chamber 101b in the stepped recess. High-pressure side components of the refrigeration cycle such as not shown) are accommodated. That is, the machine room in which the compressor 109 is disposed is formed by biting into the uppermost rear region in the refrigerator compartment 104. By providing a machine room in the rear region of the uppermost storage room of the heat insulation box 101 that is difficult to reach and is a dead space, the compressor 109 is arranged, so that a heat insulation box that is easy for the user to use in a conventional refrigerator The space in the machine room at the bottom of 101 can be effectively converted as the storage room capacity, and the storage performance and usability can be greatly improved. In the present embodiment, the matter relating to the main part of the invention described below is a type in which a compressor room is provided by providing a machine room in the rear region of the lowermost storage room of the heat insulating box 101, which has been generally used conventionally. It may be applied to other refrigerators.

  A cooling chamber 110 for generating cold air is provided on the back of the vegetable chamber 107 and the freezing chamber 108, and a cooling air conveyance path to each chamber having heat insulation is provided between the vegetable chamber 107 and the freezing chamber 108, and the chamber is configured to be insulated from each chamber. The rear partition wall 111 is configured. In the cooling chamber 110, a cooler 112 is disposed, and in the upper space of the cooler 112, the cold air cooled by the cooler 112 by a forced convection method is stored in the refrigerator 104, the switching chamber 105, the ice making chamber 106, the vegetables. A cooling fan 113 for blowing air to the chamber 107 and the freezing chamber 108 is disposed, and a radiant heater made of glass tube for defrosting the frost and ice adhering to the cooler 112 and its surroundings at the time of cooling in the lower space of the cooler 112 114, and a drain pan 115 for receiving defrost water generated at the time of defrosting, and a drain tube 116 penetrating from the deepest part to the outside of the chamber are configured at the lower portion thereof, and the evaporating dish 117 is disposed outside the downstream side of the chamber. Is configured.

  In the vegetable compartment 107, a lower storage container 119 placed on a frame attached to the drawer door 118 of the vegetable compartment 107 and an upper storage container 120 placed on the lower storage container 119 are arranged.

  A lid 122 for mainly sealing the upper storage container 120 in a state where the drawer door 118 is closed is held by the first partition wall 123 and the inner box 103 at the top of the vegetable compartment. With the drawer door 118 closed, the left and right sides and the back side of the top surface of the lid body 122 and the upper storage container 120 are in close contact with each other, and the front side of the top surface is in close contact. Furthermore, the left and right lower sides of the back surface of the upper storage container 120 and the boundary between the lower storage container 119 are provided with a gap so that moisture in the food storage section does not escape within a range where the upper storage container 120 is not in contact with the upper storage container 120 in operation.

  Between the lid body 122 and the first partition wall 123, there is provided an air passage for the cold air discharged from the vegetable room discharge port 124 formed in the rear partition wall 111. Further, a space is also provided between the lower storage container 119 and the second partition wall 125 to constitute a cold air passage. In the lower part of the rear partition wall 111 on the back of the vegetable compartment 107, there is provided a vegetable compartment suction port 126 for cooling the inside of the vegetable compartment 107 and returning heat exchanged to the cooler 112.

  It should be noted that the matters relating to the main part of the invention described below in the present embodiment may be applied to a refrigerator that is opened and closed by a frame attached to a door and a rail provided in an inner box, which has been conventionally common. I do not care.

  A water supply means 132 provided with a dew condensation part 131 for condensing excess water vapor in the warehouse at a lower temperature than other parts on a part of the inner wall surface of the inner wall partition part 111 and its condensed water are used. An ultrasonic atomizing device 139 for humidifying the inside of the cabinet and a connecting pipe 133 are formed between the devices.

  Although not shown in the figure, a filter for removing dust may be formed in the connection pipe 133. The ultrasonic atomizer 139 mainly includes a water storage tank 136 and an ultrasonic vibrator 135. The water storage tank 136 has a mist discharge port 137 for spraying mist into the vegetable compartment 107, and a water storage tank 136. A drain outlet 138 is formed for draining when the water becomes full or higher. At this time, the mist outlet 137 is provided at a position higher than the drain outlet 138.

  The ultrasonic vibrator 135 installed in the lower part of the water storage tank 136 is composed of a disk-type vibrator formed by forming a corrosion-resistant electrode of nickel or stainless steel on a piezoelectric element such as lead zirconate titanate or barium titanate. ing.

  Mist generated on the water surface of the water storage tank 136 is sprayed from the mist discharge port 137 so that the lower storage container 119 and the upper storage container 120 in the vegetable compartment 107 are maintained in a high humidity environment. In order to spray the mist into the vegetable compartment 107, the air layer on the upper surface of the water storage tank 136 may be sprayed by using a cool air in the air passage or stirring means such as a fan with a wind flow.

  Further, the vegetable compartment 107 is kept in a humid state by opening and closing the door, etc., and the drainage port 138 for draining when the condensed water is supplied to the storage tank more than necessary is configured by opening a part of the storage tank 136, The drain port 138 has a function of discharging surplus water to the drainage means using gravity only when the water level reaches a certain height. Further, the drainage port 138 communicates with a drainage path 141 that is a drainage means, and penetrates the refrigerator compartment return air path 140 through a drainage path 141 that is inclined so that water flows. Thus, in this embodiment, the return air passage 140 is used also as the drainage passage 141. At this time, it is desirable that the position of the drain outlet 138 be provided in the vicinity of the water level where the water surface height from the ultrasonic vibrator 135 is efficient for atomization.

  In addition, the surface of the refrigerating chamber return air passage 140 below the drainage passage 141 is made of a resin using a polymer material such as ABS or PP so that a heat insulating material such as polystyrene foam does not contain water.

  About the refrigerator comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, the operation of the refrigeration cycle will be described. The refrigeration cycle is operated by a signal from a control board (not shown) according to the set temperature in the cabinet, and the cooling operation is performed. The high-temperature and high-pressure refrigerant discharged by the operation of the compressor 109 is condensed to some extent by a condenser (not shown), and further, refrigerant piping ( (Not shown) and the like, while condensing and liquefying while preventing condensation on the refrigerator main body, it reaches a capillary tube (not shown). After that, the capillary tube is depressurized while exchanging heat with a suction pipe (not shown) to the compressor 109 to become a low-temperature and low-pressure liquid refrigerant and reaches the cooler 112. Here, the low-temperature and low-pressure liquid refrigerant exchanges heat with the air in each storage chamber conveyed by the operation of the cooling fan 113, and the refrigerant in the cooler 112 evaporates. At this time, cool air for cooling each storage chamber is generated in the cooling chamber. The low-temperature cold air is diverted from the cooling fan 113 to the refrigerating room 104, the switching room 105, the ice making room 106, the vegetable room 107, and the freezing room 108 using an air passage or a damper, and cooled to the respective target temperature zones. In particular, the vegetable compartment 107 is adjusted to 2 ° C. to 7 ° C. by ON / OFF operation such as cold air distribution and heating means (not shown), and generally has no internal temperature detection means. There are many things.

  The vegetable compartment 107 cools the refrigerator compartment 104 and then discharges the air from the vegetable compartment outlet 124 formed in the middle of the refrigerator compartment return air passage 140 for circulating the air to the cooler 112 to the vegetable compartment 107. It flows to the outer periphery of the upper storage container 120 and the lower storage container 119 and cools indirectly, and then returns to the cooler 112 again from the vegetable room suction port 126.

  At this time, a low temperature part is compulsorily created on some surfaces of the rear partition wall 111 by making the wall thickness etc. thinner than other parts, and the dew point temperature is relatively lower than the surrounding environment and below the dew point temperature. The water supply means 132 having the part 131 condenses water vapor to generate water.

  The water droplets condensed in the dew condensation unit 131 gradually grow, and the dew condensation water flows under its own weight without using the power of a pump or the like, and the water is stored in the connection pipe 133 and the ultrasonic atomizer 139 below the water supply means 132. Water is sequentially stored in the tank 136.

  For example, the water stored in the water storage tank 136 is atomized by the vibration of the ultrasonic vibrator 135 fixed to the lower part of the water storage tank 136. Specifically, the water surface rises and a water column is formed by the vibration of the ultrasonic vibrator 135. A surface wave is generated on the surface of the water column, and an interference wave is generated on the surface around the water column as a boundary of reflection. At this time, the power torn off the collision of water on the surface exceeds the surface tension of the water, finally leaves the water surface and is released into the air as mist.

  At this time, the mist particle diameter depends on the vibration frequency of the ultrasonic vibrator 135. For example, if the oscillation frequency is 1.6 MHz, the peak particle diameter is 5 μm, and if the oscillation frequency is 2.4 MHz, a mist of about 2 to 3 μm is generated. be able to.

  The mist sprayed in the lower storage container 119 makes the inside of the vegetable compartment 107 highly humid and at the same time adheres to the surface of the fruits and vegetables, suppresses the transpiration of the fruits and vegetables, and improves the freshness. In addition, the attached mist penetrates into the tissues through the gaps between the cells on the surface of vegetables and fruits, and the water is evaporated.The moisture is supplied again into the deflated cells, and the deflation is eliminated by the cell swell pressure. It returns to the state.

  However, during the summer and the rainy season, the installation environment is humid, and there is a possibility that excessive water vapor will flow into the cabinet due to the opening and closing of the door, and the stored items will be large, so the door will not close completely, making it a half-door. There is also a risk of becoming. At these times, the amount of water vapor in the warehouse becomes very large, and condensed water is frequently generated in the dew condensation part 131, and surplus condensed water flows to the water storage tank 136 via the connection pipe 133. In the prior art, a sensor for detecting the generation of surplus water and a water level sensor are required for the water storage tank, but the control is complicated and expensive. In the present invention, when dew condensation water is collected near the water level where atomization efficiency is high, excess water is removed from a drain outlet 138 formed in a part of the water storage tank 136 in order to prevent water from leaking into the warehouse. Drain. In this way, the drain outlet 138 discharges surplus water to the drainage means using gravity only when the water level reaches a certain height, and without using energy such as electric power. The water level of the water storage tank 136 is kept below a certain level, and surplus water can flow through the drainage path 141 provided with the inclined portion and flow into the refrigerating room return air path 140. Therefore, the drainage means can be configured with energy saving. Further, surplus water flows to the drain pan 115 along the surface of the refrigerating room return air passage 140 having a relatively high temperature, and then passes through the drain tube 116 and is drained to the evaporating dish 117. A part of the drainage is frozen by the drain pan 115. When the cooler 112 is defrosted, the radiant heater 114 becomes hot, the surrounding drain pan 115 is also heated, the ice is melted, and drained to the evaporating dish 117. About the drainage channel | path 141 and the refrigerator compartment return air channel | path 140, you may prevent the path | route freezing by heating means, such as a heater. As a result, the water level of the water storage tank can be managed without using a temperature sensor or a water level sensor in particular, so that water spilled from the water storage tank 136 is not applied to food stored in the cabinet with an inexpensive configuration. , The quality in the warehouse is improved.

  As mentioned above, in this Embodiment, in order to supply a liquid to the atomization apparatus for spraying the liquid to the vegetable room which is the comparatively high humidity environment by which heat insulation was divided, the vegetable room, and an atomization apparatus Water supply means, and by draining excess water from the excess water supply to the atomizer to the outside of the warehouse, it is possible to prevent water leakage and spillage from the storage tank. Quality can be maintained.

  Moreover, in this Embodiment, the drainage of surplus water is the path | route via the drain pan for collect | recovering the cooler for cooling each room | chamber of a refrigerator, and the defrost water which a cooler generate | occur | produces at the time of defrosting This eliminates the need for dedicated piping, thereby simplifying the configuration and reducing the cost.

  Further, in the present embodiment, on the inner surface of the vegetable room, an air passage and a blow-out port for introducing cold air generated by the cooler into the vegetable room and air exchanged in the vegetable room are circulated to the cooler. It has a partition wall that is mainly composed of a heat insulating material with an air passage and a return opening, and the atomization device is integrated with a part of the partition wall, thereby affecting the amount of storage in the warehouse The atomizing device can be installed without any problem, and the drainage path can be shortened to make the structure cheaper. Further, the food can be prevented from hitting the atomizing device when the food is added.

  Further, in this embodiment, the drain port from the atomization device is installed near the partition wall where the relatively high temperature air passage is constructed, so that the drain port part can be frozen without using heating means. It is possible to prevent surplus water from flowing into the drainage channel.

  Further, in this embodiment, the path for draining from the atomizer is not particularly used by using a dedicated pipe by installing it in an air path that circulates cool air from the refrigerator compartment having a relatively high temperature to the cooler. Even without using temperature-compensating heating means such as a heat insulating material or a heater, the pipeline can be prevented from freezing and the excess water can be drained.

  Furthermore, in this embodiment, the path for draining from the atomizer is installed in a wind path that circulates cool air from the vegetable room having a relatively high temperature to the cooler. Without using a heating means for temperature compensation such as a heater or a heater, it is possible to prevent the pipe from freezing and at the same time to use the return port of the cold air in the vegetable room, so there is no need to provide a special opening in the partition wall .

  Further, in the present embodiment, the surface of the air passage for circulating the cool air having a relatively high temperature is mainly composed of a resin using a polymer material such as ABS or PP, and thus mainly in the air passage. Material deterioration due to water content of the polystyrene foam material used for heat insulation can be prevented, and reliability can be improved.

  Furthermore, in this embodiment, since the drain outlet of the atomizer is installed on the surface on the partition wall side, the drainage path can be shortened and the number of parts can be reduced, so that the cost is low. Can be configured.

  It should be noted that although the path for draining from the atomizer is installed in the air passage that circulates cool air from the refrigerator compartment having a relatively high temperature to the cooler, the heat insulation that forms the outer shell of the refrigerator main body or the outer shell of the storage chamber It is possible to drain the surplus water to the drain pan by burying it in the material, or drain it directly to the evaporating dish.This makes it easy to insulate the pipeline, and prevents freezing and freezing in the pipeline by cooling from a cooler etc. Reliability is improved by preventing clogging of the pipe line due to growth.

  In addition, although the path for draining from the atomizer is installed in the air path that circulates cool air from the refrigerator compartment having a relatively high temperature to the cooler, the circulation air path for cooling the vegetable compartment is configured independently. In such a case, drainage may be performed using a return air channel dedicated to the vegetable room that circulates cold air from the relatively high temperature vegetable room to the cooler. As a result, a higher temperature space can be drained, and the reliability can be improved.

  In the present embodiment, a fan may be installed to promote mist diffusion to improve mist diffusion. Thereby, the mist is diffused to every corner of the vegetable room and the concentration is made uniform, so that the freshness of the whole vegetable room can be improved and local condensation due to spray concentration can be prevented.

  In the present embodiment, the water to be sprayed is the condensed water in the warehouse, but a water storage tank may be configured to be supplied by a customer or the like. In this case, water can be stably supplied.

  In this embodiment, no temperature adjustment mechanism is provided for the dew condensation part, but the temperature of the dew condensation part may be adjusted by using a heating means such as a heater on the back surface of the dew condensation part. At this time, the amount of condensation can be adjusted. Moreover, you may attach the temperature sensor for adjusting the temperature of a dew condensation part to the dew condensation part surface or its vicinity. Thereby, the surface temperature of the dew condensation part can be finely controlled. Further, a control means may be constructed that uses a humidity sensor to calculate the dew point temperature and adjust it to that temperature.

  In the present embodiment, a water level sensor for detecting the water level of the water storage tank may be provided. In this case, abnormal heat generation of the piezoelectric element that occurs in the absence of water and destruction / melting of surrounding parts can be prevented, and the upper limit can be controlled by the drain port and the lower limit can be detected by the water level sensor. So high reliability is improved.

  In this embodiment, the storage room of the refrigerator is a vegetable room, but it may be a storage room in another temperature zone such as a refrigerator room or a switching room, and in this case, it can be developed for various uses.

(Embodiment 2)
FIG. 4 is a cross-sectional view of the vicinity of the vegetable compartment of the refrigerator in the second embodiment of the present invention. FIG. 5 is a detailed cross-sectional view of the ultrasonic atomizer in Embodiment 2 of the present invention. FIG. 6 is a cross-sectional view of the vicinity of the drainage path portion in the second embodiment of the present invention.

  In the figure, the partition wall surface 171 of the vegetable compartment 107 is connected to a horn type ultrasonic atomizer 151 as a spray means and a water supply means 132 for supplying condensed water to the ultrasonic atomizer 151. A connecting pipe 133 is constructed and attached.

  The ultrasonic atomizer 151 includes a Langevin type ultrasonic vibrator 155 composed of a horn part 152, an electrode part 153a, a piezoelectric element part 154, and an electrode part 153b and a water storage tank for storing condensed water necessary for atomization. 156 is configured, and a water supply port 157 and a spray port 158 that also serves as a drain port are configured in part of the water storage tank 156. The horn part 152 has a convex shape from the bottom part toward the tip part by cutting or sintering. The tip of the horn part 152 is processed into a rectangle or a circle, the cross-sectional area ratio is about 1/5 or less, and the side surface shape of the horn part 152 depends on the oscillation frequency of the piezoelectric element part 154. The electrode portion 153a, the piezoelectric element portion 154, and the electrode portion 153b are integrally formed in this order, and are bonded and fixed with an epoxy or silicon-based adhesive between the connections, and vibration generated in the piezoelectric element portion 154 is at the tip of the horn portion. The atomizing unit 159 is configured to have a maximum amplitude.

  The ultrasonic atomizing device 151 is attached to the rear partition wall 111, has a horn portion 152 inserted from the outside to the inside of the water storage tank 156, and is a Langevin type ultrasonic transducer 155 exposed to the outside of the water storage tank 156. The outer shell is coated with silicon resin, epoxy resin, acrylic resin or the like (not shown).

  The horn part 152 is made of a material having high thermal conductivity, and examples thereof include metals such as aluminum, titanium, and stainless steel. In particular, it is preferable to select aluminum as a main component from the viewpoint of light weight, high thermal conductivity, and amplitude amplification performance during ultrasonic transmission. However, corrosion resistance as in a refrigerator is necessary and long. It is desirable to select a material mainly made of stainless steel such as SUS304 or SUS316L for those that require consideration of life extension.

  The spray port 158 is provided with a rectangular or circular hole in a part of the water storage tank 156, and is provided with a hole at one end in the direction in which the liquid is atomized from the atomizing unit 159, that is, the amplitude direction of the piezoelectric element. The spray port 158 also serves as a drain port for keeping the water level of the water storage tank constant.

  When the humid state continues by opening and closing the door or the like, and when the dew condensation water more than necessary is supplied to the water storage tank 156, the water is discharged from the spray port 158. At this time, a drain 161 is formed between the cover 161 and the cover 161 and the ultrasonic atomizer 151 so that water does not spill into the vegetable compartment 107. This drainage path 160 is fitted to a drainage path 141 penetrating the refrigerator compartment return air passage 140 in a part of the rear partition wall 111, and the lower surface of the drainage passage 160 flows into the refrigerator compartment return air passage side so that water can easily flow. So as to be inclined. At this time, the drainage path 141 is configured by a partition wall surface 171 using a material such as ABS and extends to the refrigerating room return air path 140, and in the vicinity of the refrigerating room return air path 140, a part of the rear partition wall 111. The protrusion 173 and the draining portion 174 are configured so that water is not applied to a certain heat insulating material 172. In addition, a sealing material 175 is configured in the fitting portion to prevent cold air leakage and water leakage.

  About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

  Excess water vapor in the vegetable compartment 107 is condensed at the dew condensation part 131 provided in a part of the rear partition wall 111 to generate water droplets. The adhering water droplets grow gradually, drop due to their own weight, flow to the connecting pipe 133, and the liquid is supplied from the water supply port 157 toward the horn unit 152, or directly supplied to the water surface of the water storage tank 156. At this time, a surface tension is formed between the water surface or the spray port 158 and the horn part 152, and water is supplied to the atomizing part 159 at the tip of the horn part 152. In this state, the high voltage / oscillation circuit is energized to oscillate a high voltage at a predetermined frequency (for example, 80 k to 210 kHz), and when applied to the electrode portion 153a and the electrode portion 153b, the piezoelectric element portion 154 vibrates and is supplied. Capillary waves are generated on the surface of the water at the tip of the atomizing section 159, and the water at the tip is atomized into several μm to several tens of μm and atomized as mist in the vibration direction. By passing the mist through the spraying port 158, the mist having a large particle diameter generated from other than the tip of the horn part 152 is classified and subdivided using a rectangular or circular outer periphery. At this time, the classified large mist returns to the water storage tank 156.

  The ultrasonic atomizer 151 is energized at regular intervals, for example, 1 minute ON, 9 minutes OFF, and sprayed onto the vegetable compartment 107 while adjusting the amount of atomization. To do. As a result, the vegetable compartment 107 can be humidified, and the transpiration from the vegetables can be suppressed. At the same time, the vibration generated in the piezoelectric element portion 154 is energized so that the atomizing portion 159 which is the tip of the horn portion has the maximum amplitude. Since it is concentrated, the piezoelectric element portion 154 can be suppressed to a low heat generation amount of about 1 W to 2 W, and the temperature effect on the vegetable compartment 107 can be reduced.

  Also, during the summer and the rainy season, the installation environment is humid, and there is a possibility that excessive water vapor will flow into the cabinet due to the opening and closing of the door, and the stored items will be large, so the door will not close completely and it will be half-door There is also a risk of becoming. At these times, the amount of water vapor in the warehouse becomes very large, and condensed water is frequently generated in the dew condensation part 131, and excess condensed water flows to the water storage tank 156 via the connection pipe 133.

  When excessive dew condensation water is supplied, the lower end of the spray port 158 is slightly lower than the lower end of the horn portion 152 in order to prevent the horn portion 152 from being submerged and becoming atomized or spilling into the vegetable compartment 107. When the dew condensation water is excessively supplied to the water storage tank 156 at the low position, the water is discharged from the spray port 158. The drained water is received by the cover 161, flows through the drainage path 160 between the ultrasonic atomizer 151 and the cover 161, and further, the drainage path 141 provided in a part of the rear partition wall 111, and the refrigerating room return air path 140. Flowing into. Excess water flows to the drain pan 115 along the surface of the refrigerating room return air passage 140 having a relatively high temperature, and then passes through the drain tube 116 and is drained to the evaporating dish 117. A part of the drainage is frozen by the drain pan 115. When the cooler 112 is defrosted, the radiant heater 114 becomes hot, the surrounding drain pan 115 is also heated, the ice is melted, and drained to the evaporating dish 117. The drainage path and the refrigerator return air path 140 may be prevented from freezing by heating means such as a heater. As a result, the water level of the water storage tank can be managed without using a temperature sensor or a water level sensor in particular, so that water spilled from the water storage tank 136 is not applied to food stored in the cabinet with an inexpensive configuration. , The quality in the warehouse is improved.

  Further, the tip of the drainage path in the return air passage of the refrigerator compartment is provided with a protrusion 173 for separating the heat insulating material 172 from the heat insulating material 172 and a water draining portion 174 for preventing water from contacting the heat insulating material due to surface tension. It does not take. Moreover, since the fitting part of the drainage path has the sealing material 175, there is no leakage of cold air, so there is no influence on the inside temperature, and water does not flow backward. The cover 161 also serves as a means for classifying mist having a relatively large diameter. Since the mist of finer particles is sprayed in the vegetable compartment 107, the diffusibility is improved and condensation due to spray concentration can be prevented. it can.

  Further, the coating material covering the piezoelectric element portion 154 is preferably selected from a flexible silicone resin as a main component from the viewpoint of amplitude amplification performance during ultrasonic transmission. The horn portion 152, the electrode portion 153a, and the piezoelectric material are preferably selected. This prevents liquid and water vapor from entering the joint portion between the element portion 154 and the electrode portion 153b, prevents deterioration of the adhesive, and contributes to improvement in lifetime reliability.

  A packing material (not shown) may be used in the gap between the water storage tank 156 and the Langevin type ultrasonic transducer 155 to prevent water leakage and resonance. Thereby, noise can be reduced if water leakage from the water storage tank can be prevented. Specifically, life reliability is improved by using a fluorine-based packing material.

  Moreover, about the water storage tank 156, generation | occurrence | production of the microbe in the liquid collected in the water storage tank 156 can also be suppressed by using the resin material which kneaded resin of the antibacterial agent.

  As described above, in the present embodiment, a vegetable room that is a relatively high humidity environment with heat insulation compartment, a Langevin type ultrasonic atomizer for spraying a liquid on the vegetable room, and a Langevin type ultrasonic fog Water supply means for supplying liquid to the gasification device, and drains the excess water whose amount of water supply to the Langevin type ultrasonic atomizer is excessive to a part of the water storage tank. By draining from the drainage path composed of the cover and Langevin type ultrasonic atomizer and the drainage path constructed in part of the rear partition wall, it is possible to prevent water leakage and spillage from the water storage tank So you can keep the quality of the vegetable room.

  Further, in the present embodiment, surplus water is drained in the same direction as the spray port, and the recovery means and the path are provided, so that the mist of large particles can be recovered by the recovery means at the same time as the spray port and the drain port. Since it can be recovered, the mist diameter can be reduced, and humidification in the cabinet can be improved and condensation can be prevented.

  In the present embodiment, the liquid to be atomized is the water recovery unit, but a tank supplied with water from the inside of the refrigerator or from the outside may be used. As a result, the liquid is sufficiently supplied, so that the liquid can be atomized in a timely manner.

  In the present embodiment, the liquid to be atomized may include metal ions having bacteriostatic and deodorizing power, such as zinc ion water, silver ion water, copper ion water, and the like. Thereby, the inhibitory effect of the microbe which generate | occur | produces in a storage chamber can be improved.

  In the present embodiment, the drainage path is configured as a part of the rear partition wall, but may be a suction port of the vegetable room and its return air path. In this case, parts such as a sealing material are not necessary and can be configured at low cost.

(Embodiment 3)
FIG. 7 is a cross-sectional view of the vicinity of the vegetable compartment of the refrigerator according to Embodiment 3 of the present invention. FIG. 8 is a front view of the vicinity of the vegetable compartment in Embodiment 3 of the present invention. FIG. 9 is a cross-sectional view of the vicinity of the electrostatic atomizer in Embodiment 3 of the present invention.

  The refrigerating room having a relatively high temperature in the rear partition wall 111 is also provided with an electrostatic atomizer 181 that is a spray means in the vicinity of the return air passage 140, a water supply means 132 for supplying water to the atomizer, and a connecting pipe 133. It is configured.

  The electrostatic atomizer 181 includes a water storage tank 182 for holding water from the water supply means 132, a nozzle 183 whose tip is directed toward the inside of the storage tank at the bottom, an application electrode 185 in the water storage tank 182, and a spray port 188. A counter electrode 186, a holding member 190 for holding the counter electrode 186 so as to keep a certain distance in the vicinity, and an upper portion of the water storage tank 182 are drained between a water supply port 189 and a water supply port 189 and a spray port 188. A mouth 184 is configured. The drainage port 184 can adjust the spray amount and the particle diameter according to the positional relationship of the spraying port 188, and here, it is configured in a positional relationship such that relatively large mist is not scattered.

  Further, the low voltage side of the voltage application unit 187 for generating a high voltage is electrically connected to the application electrode 185 and the high voltage side to the counter electrode 186, respectively. In addition, the electrostatic atomizer 181 is attached to the partition wall surface 171 of the rear partition wall 111 by a connecting portion of an attachment member (not shown).

  About the refrigerator comprised as mentioned above, the operation | movement is demonstrated below.

  First, the vegetables and fruits stored in the vegetable room 107 usually include those that are slightly deflated by transpiration at the time of purchase return or transpiration during storage. It fluctuates depending on the fluctuation of the door, the influence of opening and closing of the door, and the operating state of the refrigeration cycle. Furthermore, the storage environment is severe, and transpiration is promoted and it is easy to wither.

  Therefore, by operating the electrostatic atomizer 181, the mist is sprayed on the vegetable compartment 107 to quickly humidify the interior.

  Excess water vapor in the vegetable compartment 107 is condensed on the dew condensation part 131, and water droplets attached to the dew condensation part 131 grow, drop by its own weight, flow to the connection pipe 133, and enter the water storage tank 182 of the electrostatic atomizer 181. Stored. The condensed water is atomized at the spray port 188 at the tip of the nozzle 183 of the electrostatic atomizer 181 and sprayed onto the vegetable compartment 107.

  At this time, the application electrode 185 in the vicinity of the spray port 188 of the electrostatic atomizer 181 is set to the low voltage side, the counter electrode 121 is set to the high voltage side, and a high voltage (for example, 4 to 10 kV) is applied between the electrodes by the voltage application unit 187. Is applied. At this time, for example, corona discharge occurs between electrodes separated by a distance of 15 mm, the water droplets are refined by electrostatic energy generated at the tip of the nozzle 183 in the vicinity of the application electrode 185 and the counter electrode 186, and the droplet is further charged. Therefore, fine particles of several nanometers to several micrometers are formed by Rayleigh splitting, and nano-level fine mist having an electric charge of about 1 μm or less that cannot be visually observed, and ozone, OH radicals, and the like are generated. The voltage applied between the electrodes is as extremely high as 10 kV, but the discharge current value at that time is μA level, and the input is as low as 1 to 3 W. However, the generated fine mist is about 1 g / h and can be sufficiently atomized and humidified in the vegetable compartment 107.

  The mist sprayed from the spray port 188 at the tip of the nozzle 183 is a mist having two peaks of about several tens of nm and several μm, and the nano level fine mist adhering to the vegetable surface contains a lot of OH radicals and the like. In addition to being effective for sterilization, antibacterial, sterilization, etc., it encourages vegetables to increase nutrients such as removal of agricultural chemicals by oxidative degradation and vitamin C due to antioxidants. It adheres to the vegetable surface and can keep moisture around the vegetable surface. At this time, fine water droplets adhere to the vegetable surface, but there is also a surface in contact with the air, so there is no obstruction of breathing and no water rot occurs. Therefore, at the same time as the humidity in the vegetable compartment 107 becomes high, the humidity on the vegetable surface and the humidity in the storage chamber are in an equilibrium state, and transpiration can be prevented from the vegetable surface, and the attached mist is a gap between cells on the vegetable and fruit surfaces. The tissue penetrates into the tissue, and water is supplied again into the deflated cells, and the deflation is eliminated by the bulging pressure of the cells, resulting in a state of a chakit.

  Also, during the summer and the rainy season, the installation environment is humid, and there is a possibility that excessive water vapor will flow into the cabinet due to the opening and closing of the door, and the stored items will be large, so the door will not close completely and it will be half-door There is also a risk of becoming. At these times, the amount of water vapor in the warehouse becomes very large, and condensed water is frequently generated in the dew condensation part 131, and excess condensed water flows to the water storage tank 182 through the connection pipe 133.

  In order to prevent spilling into the vegetable compartment 107 when excessive dew condensation water is supplied, the water level is kept below a certain level by draining excess water from a drain outlet 184 to a part of the water storage tank 182. The drained water is received by the cover 161 and flows through the drainage path 160 between the ultrasonic atomizer 151 and the cover 161, and the excess water flows through the drainage path 141 provided with the inclined portion and flows into the refrigerating room return air path 140. . Excess water flows to the drain pan 115 along the surface of the refrigerating room return air passage 140 having a relatively high temperature, and then passes through the drain tube 116 and is drained to the evaporating dish 117. A part of the drainage is frozen by the drain pan 115. When the cooler 112 is defrosted, the radiant heater 114 becomes hot, the surrounding drain pan 115 is also heated, the ice is melted, and drained to the evaporating dish 117. About the drainage channel | path 141 and the refrigerator compartment return air channel | path 140, you may prevent the path | route freezing by heating means, such as a heater. Thereby, the water level of the water storage tank 182 can be managed without using a temperature sensor, a water level sensor, etc. in particular, so that water spilled from the water storage tank 182 is not applied to food stored in the warehouse with an inexpensive configuration. Therefore, the quality in the warehouse is improved.

  Further, the tip of the drainage channel 141 in the return air passage 140 in the refrigerator compartment is provided with a protrusion 173 for separating the heat insulating material 172 from the heat insulating material 172, and a water draining portion 174 so that water does not contact the heat insulating material due to surface tension. Does not splash water. In addition, since there is a sealing material 175 at the fitting portion between the drainage port 184 and the drainage path 141 installed in the water storage tank 182, there is no leakage of cold air, so there is no effect on the internal temperature, and water flows backward. There is nothing to do.

  As described above, in the third embodiment, the heat insulating box, the storage chamber partitioned in the heat insulating box, and the water supply means for supplying water necessary for supplying fine mist to the storage chamber; Spraying an application electrode for applying a voltage to the liquid, a counter electrode disposed at a position facing the application electrode, and a voltage application unit for applying a high voltage between the application electrode and the counter electrode Because it can prevent water leakage and water spillage from the water storage tank by providing a water storage tank for storing water for water and an electrostatic atomizer with a drain outlet in a part of the water storage tank The quality of the room can be maintained. Furthermore, the amount of atomization to be sprayed is stabilized, the freshness of vegetables is improved, the sterilization of storage rooms and vegetables, the decomposition of agricultural chemicals on the surface of vegetables, and vitamin C and other nutrients. Increase and use other detection means. Miniaturization because it is not, it can be inexpensive.

  As described above, the refrigerator according to the present invention can be applied not only to household or commercial refrigerators or vegetable storage, but also to applications such as low-temperature distribution of food such as vegetables and warehouses.

The longitudinal cross-sectional view of the refrigerator in Embodiment 1 of this invention The front view of the vegetable compartment vicinity of the refrigerator in Embodiment 1 of this invention Detailed sectional view of the vicinity of the vegetable compartment of the refrigerator in Embodiment 1 of the present invention Sectional drawing of the vegetable compartment vicinity of the refrigerator in Embodiment 2 of this invention Detailed sectional drawing of the ultrasonic atomization apparatus in Embodiment 2 of this invention Sectional drawing of the drainage path part vicinity in Embodiment 2 of this invention Sectional drawing of the vegetable compartment vicinity of the refrigerator in Embodiment 3 of this invention Front view near the vegetable compartment in Embodiment 3 of the present invention Sectional drawing of the electrostatic atomizer vicinity in Embodiment 3 of this invention Longitudinal sectional view near the ultrasonic atomizer of a conventional refrigerator The expansion perspective view which shows the principal part of the atomization apparatus of the conventional refrigerator Vertical side view around the vegetable compartment of the main body of a conventional refrigerator (A) Top view of cover (b) Cross-sectional view taken along line BB in FIG. 13 (a) (c) Cross-sectional view taken along line A-A in FIG. 13 (a) Longitudinal sectional view of a conventional refrigerator mist generator and cover Top view of conventional refrigerator storage tank

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Refrigerator 101 Heat insulation box 102 Outer box 103 Inner box 104 Refrigeration room 105 Switching room 106 Ice making room 107 Vegetable room 108 Freezing room 109 Compressor 110 Cooling room 111 Back surface partition wall 112 Cooler 113 Cooling fan 114 Radiant heater 115 Drain pan 116 Drain tube 117 Evaporating dish 118 Door 119 Lower storage container 120 Upper storage container 122 Lid 123 First partition wall 124 Vegetable chamber discharge port 125 Second partition wall 126 Vegetable chamber suction port 131 Condensation part 132 Water supply means 133 Connection pipe 135 Ultrasonic vibrator 136 Water storage tank 137 Mist discharge port 138 Drain port 139 Ultrasonic atomizer 140 Refrigerating chamber return air channel 141 Drain channel 151 Ultrasonic atomizer 152 Horn unit 153a, 153b Electrode unit 154 Piezoelectric element unit 55 Langevin type ultrasonic transducer 156 Water storage tank 157 Water supply port 158 Spray port 159 Atomization part 160 Drainage path 161 Cover 171 Partition wall surface 172 Heat insulating material 173 Projection part 174 Water drain part 175 Seal part 181 Electrostatic atomizer 182 Water storage tank 183 Nozzle 184 Drainage port 185 Application electrode 186 Counter electrode 187 Voltage application unit 188 Spray port 189 Water supply port 190 Holding member

Claims (7)

A storage compartment partitioned by heat insulation, an atomization device for spraying liquid into the storage chamber, water supply means for supplying liquid to the atomization device, and a spray port provided in the atomization device; And a drainage means for draining excess water whose amount of water supply to the atomizer is excessive to the outside of the storage chamber, the drainage means being located in front of the spraying port, and the spraying port as a drainage port Combined refrigerator.   The refrigerator according to claim 1, further comprising a cooler for cooling each room of the refrigerator, wherein the drainage means includes a drainage path via a drain pan for collecting defrosted water generated when the cooler defrosts. .   On the inner surface of the storage room, there are an air passage and an outlet for introducing the cold air generated by the cooler into the storage room, and a return air passage and an inlet for circulating the air heat-exchanged in the storage room to the cooler. The refrigerator according to claim 1, further comprising: a partition wall provided with an atomizer configured integrally with a part of the partition wall.   The refrigerator according to claim 3, wherein the atomizing device has a water supply port, a spray port, and a drain port communicating with the drainage means, and the drain port is installed in the vicinity of the return air passage of the partition wall.   The refrigerator according to any one of claims 1 to 4, wherein the drainage path included in the drainage means is a conduit embedded in a heat insulating material constituting the outer shell of the main body of the refrigerator or the outer shell of the storage chamber.   The refrigerator according to any one of claims 1 to 4, wherein the drainage path provided in the drainage means uses a return air path for circulating cold air from the storage chamber to the cooler.   The refrigerator according to claim 6, wherein the surface of the return air passage for circulating cold air from the storage chamber to the cooler as a drainage path provided in the drainage means is made of resin.