JPH0623900Y2 - Thermal insulation structure of refrigeration equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a refrigerating showcase or a refrigerating device such as a material case used for displaying material in a sushi shop,
In particular, it relates to suppression of heat conduction in the cooling section.

[Prior Art] Such a refrigerating apparatus has a machine room accommodating a refrigerant compressor or the like that constitutes a refrigeration circuit, and a display room accommodating a cooling pipe for evaporating a refrigerant to remove heat from the surroundings and cool it. In the display room, for example, fresh food items are put and displayed in a refrigerated state.

In addition, in a general refrigerating device that does not display refrigerated items,
As disclosed in Japanese Utility Model Laid-Open No. 63-120071, cold air is also distributed around or inside a storage box for storing refrigerated items.

[Problems to be solved by the invention] In the structure having the cooling pipe directly provided in the refrigerating display room described above, (2) Since the refrigerant is directly evaporated in the cooling pipe, moisture in the display room is condensed and frost is formed on the outer peripheral surface of the cooling pipe, which accelerates the drying of the atmosphere in the display room. Or (3) when the operation is stopped, the above frost falls on the object to be displayed, so it is forced to operate continuously, it is difficult to control the temperature inside the warehouse, and it is not possible to save electricity. (4) Due to the temperature difference between the cooling pipe and the display room, airflow due to natural convection is generated, and when the displayed object is particularly fresh food, it is affected by the airflow. Various problems that the surface of fresh food will be discolored There was a point.

Also, even in the case of circulating cold air around the display room or the storage box, if the cool air directly touches the bottom plate of the display room,
It cools better than the other parts and causes a temperature gradient, which causes natural convection inside the display room, causing the same problems as described above.

The present invention has been made in view of the above problems,
An object of the present invention is to provide a refrigerating device which does not have a cooling pipe in the display room, indirectly cools the inside from the outside, and does not overcool the bottom plate.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides an outer box having a front windshield with an outer windshield and a bottom having an insulating structure, and an inner front provided in the outer chest. In the refrigerating device, which is provided with a glass and has an inner box for housing an object to be displayed, forms a double-structured display room, and a machine room for refrigeration circuit equipment is arranged below the display room, wherein A cool air discharge passage formed between the structure and the bottom plate of the inner box communicates with a cooler chamber formed in a recess of the heat insulating structure, and is defined along side plates and a top plate of the inner box. The cold air circulation passage communicates with the cold air discharge passage, and a heat insulating material is attached to the bottom plate of the inner box.

[Operation] When the refrigeration circuit is operated, the refrigerant flowing into the cooler takes heat from the surroundings and evaporates. The air in the cooling chamber, which has become low in temperature, is discharged to the cool air discharge passage by the blower, cools the inside of the inner box while passing through the cool air circulation passage, and returns to the cooling chamber via the cold air suction passage. The air inside the inner box is deprived of heat via the top plate, side plates and windshield, and is kept at a low temperature. In addition, since the bottom plate has a heat insulating material attached to the lower surface to suppress heat conduction, it suppresses overcooling and cools the interior air in a well-balanced manner, thereby refrigerating the displayed items inside.

[Embodiment] Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals indicate the same or corresponding portions. Further, the present invention will be described below in the case of being applied to a material case used in a sushi shop or the like, but as will be apparent to those skilled in the art, it can be used for storage or display of something other than sushi material, It is not limited to the story case.

FIG. 1 shows an outline of a news item case (refrigerator) 1 according to the present invention. The news item case 1 has a display room 2 at the top.
A machine room 3 is provided below the display room 2, and side covers 4 fitted to the top cover 34 are attached to both ends of the display room 2. Therefore, almost the entire length between both ends of the neta case 1 is the display room 2. When this material case 1 is placed on a counter (not shown) in a sushi restaurant, the front side in FIG. 1 is arranged toward the customer, and the rear side shown in FIG. 2 is the user side of the material case 1, that is, sushi. Arranged for craftsmen.

On the back side, as shown in FIG. 2, a power cord 5, a ground wire 6, a drain pipe 7, a rear cover 8, a ventilation port 9, a center frame 10, a sliding door 11, power on / off to the machine room 3. There is a switch S and the like. In addition, a transparent double windshield is installed on the customer side as described later.

3 and 4 are sectional views showing the net case 1 shown in FIGS. 1 and 2 along a vertical cross section and a horizontal cross section in the longitudinal direction, respectively, and can be understood from these figures. Thus, in the machine room 3 surrounding the cooler room 12 defined by recessing the heat insulating structure 21 in a concave shape, a compressor 16 supported by an electric equipment board 13, preferably a leg 17 made of rubber. The compressor fans 18a and 18b, the condenser 19, the duct forming plate 33, and the like are arranged. A blower fan 14 and a cooler 15, which are cold air circulation devices, are arranged in the cooler chamber 12.
The cooler (evaporator) 15, the compressor 16 and the condenser 19 are connected to each other by a refrigerating pipe (not shown) to form a refrigerating circuit.

Further, the cooler chamber 12 is partitioned into a blower fan side and a cooler side by a partition plate 64, and on the cooler side, a plurality of wind direction plates 32 are radially arranged near the discharge port of the blower fan 14. The air from the blower fan 14 is appropriately directed to the cooler 15. Further, in FIG. 4, reference numeral 30 indicates a thermostat, and reference numeral 31 indicates a temperature sensing portion thereof.

Display room 2 that defines a display space 65 inside the story case 1.
Is composed of an inner box and an outer box, and cold air passages 20, 28, 29 and 40 are formed between them. At the upper portion of the cooler chamber 12 described above, openings 12a and 12b communicating with the ends of the cool air passages 20 and 29 are formed, and are blown by the blower fan 14 as indicated by the arrow in FIG. The cool air exits the cooler chamber 12 through the above-described opening 12a, passes through the cool air passages 20, 28, 29 and 40, and returns to the cooler chamber 12 through the opening 12b and circulates. The cooling passage 40 is shown in FIG. 5 and communicates with the cold air passage 29. The fifth
In the figure, the cold air passages 29, 40 appear to be blocked by the fixing member 42, but the fixing member 42 does not extend long along the longitudinal direction of the neta case 1, but in reality,
It is a comparatively short one that is arranged separately, and the cold air passage
29 and 40 communicate with each other. Although not shown, the cold air passage 40 also communicates with the passage 28.

The inner box of the display room 2 has a bottom plate 23 at the bottom, a pair of side plates 24 connected to the bottom plate 23 at the lower end and extending upward, a top plate 36 connected to the upper ends of the pair of side plates 24, and an upper end at the top. An inner windshield 39 supported by a plate 36, a lower end thereof supported by a bottom plate 23, and left and right sides thereof engaged with a pair of side plates 24 (see FIG. 5).
The outer box is composed of a heat insulating structure 21 at the bottom and the heat insulating structure.
A pair of side frames connected to 21 at the lower end and extending upward
25, a top frame 35 connected to the upper ends of the pair of side frames 25, an upper end supported by the top frame 35, a lower end supported by the heat insulating structure 21, and left and right ends on the pair of side frames 25. Outside windshield engaged
It consists of 38 (see Fig. 5). The outer windshield 38 is double glazing as shown. As shown in FIG. 3, a heat insulating material 26 is filled between each side cover 4 and the side frame 25, and the back surface of the bottom plate 23 extending from the upper part of the cooler chamber 12 to the cool air passage 28. Suitable insulation 22
Is affixed.

The condensing fan described above is not composed of only one having a large diameter, but is composed of two having a small diameter 18a, 18b so that the height of the machine room 3 can be reduced. Also, two fans 18
By adopting a and 18b, it is possible to allow each fan to share the cooling area of the condenser 19 by sucking air, so that even if the diameter is small, the heat exchange efficiency of the condenser 19 does not decrease. The fan 18a is directed to the compressor 16 on the air discharge side, and the fan 18b is directed to the front side of the machine room 3, that is, the customer side, and is used for cooling the condenser 19 to raise the temperature and generate warm air. The front cover 52 (see FIG. 5) of the machine room 3 is oriented. The front cover 52 has an opening 51, through which the warm air passes through the passage 50 defined by the air guide 44 as shown by the arrow in FIG. 5, along the outer surface of the outer windshield 38. To prevent fogging of the windshield 38 on the customer side.

As best seen from FIG. 5 which shows a cross section taken along the line VV of FIG. 4, two parallel legs 58 are provided from the bottom plate 58 of the machine room 3.
Protrude, and preferably supports the neta case 1 on the counter through a rubber pad 57. Also, display room 2
Insulation structure 21 consisting of bottom insulation material 27 that defines the outer box of
Is inclined upward from the left side to the right side in FIG. 5, and therefore the space in the machine room 3 is higher on the craftsman side (right side in FIG. 5) than on the customer side. Cooler in machine room 3 occupying a relatively large space
15, the compressor 16, the condenser 19 and the like are configured so that they can be sufficiently accommodated, and these equipments are installed near the craftsman side (upper side in FIG. 4) as shown in FIG. It

The bottom plate 23 of the display chamber 2 above the heat insulating structure 21 is also inclined and arranged at a predetermined distance so as to define the above-mentioned passage 20. The heat insulating structure 21 extends to the lower part of the outer windshield 38 and the inner windshield 39 or the vicinity thereof. The bottom plate 23 is bent in front of the lower end to approach the heat insulating structure 21, and a groove 66 extending in the longitudinal direction of the net case 1 is formed near the lower end. In this groove 66,
A base plate 43 is detachably arranged so as to be substantially flush with the upper surface of the bottom plate 23. Although not shown, the bottom plate 23 and the floor plate
It is common to lay "snowboard", "ginsu", etc. on the top of 43 and put the material on it.

The bottom plate 23 and the heat insulating structure 21 are formed with drainage ports 45 at appropriate places (two places as understood from FIG. 4 in the embodiment) so as to communicate with the above-mentioned groove 66 via the seal member 48. A drain hose 49 is connected to the drain port 45 via a connection pipe 47, and the drain hose 49 communicates with the drain pipe 7. The seal member 48 having an opening is held by forming an annular projecting portion 46 on the bottom plate 23 and fitting the projecting portion 46 into the opening of the seal member 48.

Further, as shown in FIG. 5, two rail portions 55 that receive the upper end of the sliding door 11 are formed at one end along the longitudinal direction of the top cover 34, and the upper end of the rear cover 8 of the machine room 3 is formed. Is formed with two rail portions 53 that receive the lower end of the sliding door 11 via a slider 54, and the sliding door 11 is left and right along the rail portions 53 and 55 (in the direction perpendicular to the paper surface in FIG. 5). Can be opened and closed. The rail 53 is placed on the upper end of the bottom plate 23 and is stably supported. The lower end of the bottom plate 23 is bent into an L-shape to support the lower end of the inner windshield 39 via a packing 41a, and the upper end of the inner windshield 39 is fixed to the top plate 36 and its fixing member 42 via a packing 41b. Supported. On the other hand, the lower end of the outer windshield 38 is supported by the lower end of the heat insulating structure 21 via a packing 37a, and the upper end thereof is supported by the other end along the longitudinal direction of the top cover 34 via a packing 37b.

Although not described in detail, reference numeral 59 in FIG. 3 is a seal member for sealing the cooler chamber 12, reference numeral 60 is a drain pipe for draining the cooler chamber 12 in FIG.
In the figure, reference numeral 62 denotes a mounting plate for mounting the compressor 16, respectively.

[Advantage of the Invention] As described above, according to the present invention, the cool air discharged from the cooler chamber flows through the cooling circulation passage defined along the top plate, the side plate and the inner windshield of the inner box, and Since the inside of the box is indirectly cooled, there is no problem in cleaning the inside of the display space and there is no frost inside. Furthermore, since a heat insulating material is attached to the bottom plate of the inner box, there is no difference in temperature between the top and bottom due to supercooling of the bottom and internal air flow due to this, and fresh food can be refrigerated as it is. .

[Brief description of drawings]

FIG. 1 is a perspective view of the refrigerating apparatus according to the present invention seen from the front side, FIG. 2 is a perspective view of the refrigerating apparatus seen from the rear side, and FIG.
FIG. 4 is a vertical sectional view of the refrigerating apparatus of FIG. 1 cut in the longitudinal direction, FIG. 4 is a horizontal sectional view of the machine room of the refrigerating apparatus of FIG. 1 cut in the longitudinal direction, and FIG. 5 is FIG. 5 is a cross-sectional view taken along line VV of FIG. 1 …… Refrigerator (net case) 2 …… Display room, 3 …… Machine room 12 …… Cooler room, 15 …… Cooler 14 …… Cold air circulation device (blower fan) 19 …… Condenser 20, 28 , 29, 40 …… Cold air passage 21 …… Insulation structure, 22 …… Insulation material 23 …… Bottom plate, 24 …… Side plate 25 …… Side frame, 25 …… Top frame 36 …… Top plate, 38 …… Outside Windshield 39 …… Inside windshield

Claims (1)

[Scope of utility model registration request] 1. An outer box having a front windshield (38) and a bottom having a heat insulating structure (21), and an inner windshield (39) provided in the outer box. A double-structured display room (2) is formed from the inner box that houses the display object, and a machine room (3) for the refrigeration circuit equipment (16, 19) is arranged below the display room (2). In the refrigerating apparatus (1), the cold air discharge passageway (20) formed between the heat insulating structure (21) and the bottom plate (23) of the inner box has the heat insulating structure (21).
The cool air circulation passages (28, 29, 40) communicating with the cooler chamber (12) formed in the recess of the inner box and defined along the side plate (24) and the top plate (36) of the inner box. A heat insulating structure for a refrigerating device, characterized in that a heat insulating material (22) is attached to the bottom plate (23) of the inner box, the heat insulating structure being in communication with the cold air discharge passageway (20).