JP4474867B2 - Human body local cleaning device and toilet device equipped with the same - Google Patents

Description

  TECHNICAL FIELD The present invention relates to a human body local cleaning device that sprays cleaning water heated to warm water onto a human body local part and cleans it.

  Generally, a human body local cleaning device that sprays cleaning water on a local part of the human body is equipped with a hot water heater or an instantaneous hot water heater that adjusts the cleaning water such as tap water to an appropriate temperature so as not to cause discomfort to the human body. I have. And in the hot water storage type human body local cleaning device equipped with a hot water storage type heater, a predetermined amount of cleaning water previously stored in a hot water storage tank in preparation for cleaning is always heated to a certain temperature with a heater, and a sufficient amount It can be cleaned using the cleaning water (see, for example, Patent Document 1).

  The hot water storage type heater in such a hot water storage type human body local cleaning device has a hot water storage tank 82 for cleaning water having an inlet 80 for cleaning water and an outlet 81 for discharging the cleaning water heated at a low temperature as shown in FIG. And a heating pipe disposed at a lower portion of the hot water storage tank 82 and connected to the outlet 81 by a communication pipe 83 so that the washing water in the hot water storage tank 82 is substantially partitioned by a horizontally long outer cylinder 84 made of a heat-conductive material. A chamber 85 and a ceramic heater cylinder 86 disposed horizontally in the heating chamber 85 are provided.

  The ceramic heater cylinder 86 is always pushed up by the washing water flowing from the introduction port 80 and constantly heats the washing water in the heating chamber 85 through the communication pipe 83, and the outer cylinder heated by the heat transfer from the washing water. The washing water in the hot water storage tank 82 is heated at a low temperature through the body 84 to store hot water.

  Then, when washing the human body part by ejecting washing water from the local washing nozzle 87, the low temperature which is pushed up by the washing water flowing in from the introduction port 80 and enters the heating chamber 85 through the communication pipe 83 as shown by the arrow. The heated cleaning water is instantaneously heated to a predetermined temperature while being supplied to the local cleaning nozzle 87 while flowing inside and outside the ceramic heater cylinder 86.

  However, in the hot water storage type human body local cleaning device, the low temperature cleaning water in the hot water storage tank 82 is further instantaneously heated to a predetermined temperature by the ceramic heater cylinder 86 at the time of local cleaning of the human body. Compared with a hot water storage type local body cleaning device that heats and stores cleaning water to the temperature required for cleaning, the cleaning water in the hot water storage tank 82 can be heated to a lower temperature and stored, so that heat dissipation loss and consumption Although the electric power can be reduced, the washing water must be kept warm by the ceramic heater cylinder 86 regardless of the use or non-use of the washing water.

In addition, the capacity of the hot water storage tank is limited from the installation, and when several people perform local cleaning continuously, the amount of hot water used varies depending on the individual, but the temperature drops during cleaning. The situation where the wash water flows out that makes the user feel uncomfortable, for example, when the low temperature hot water kept in the hot water storage tank is used up, a so-called “hot water out” condition occurs, and the temperature of the wash water drops from that point during the wash. As a result, the wash water may flow out of sensation. Therefore, in order to prevent such a situation in which the temperature drops during the cleaning, and the user feels uncomfortable, the flow rate must be sacrificed, that is, the flow rate is not optimal for the user, and the flow rate is not satisfactory. There was a problem of not being.

  On the other hand, in the instantaneous type human body local cleaning device equipped with the instantaneous hot water heater, the heating water is instantaneously heated to a predetermined temperature by energizing the heating element only at the time of local cleaning. Although no power is consumed, there is a demand for a quantity of hot water for washing that provides a sufficient feeling of washing.

In other words, with the instant hot water heater provided in the human body local cleaning device, depending on the individual, for example, a cleaning time of 30 seconds to 1 minute, even if multiple people continue to use continuously, it is the optimal cleaning for local cleaning The amount of water can be secured, and while passing through the instantaneous hot water heater, it is kept heated to the optimum temperature for local cleaning, so that the washing water that feels uncomfortable due to temperature drop on the way does not flow out, so-called The fact is that it is required not to “run out of hot water”.
JP 2003-106669 A

  In view of the problems of the above-described conventional technology, the problem to be solved by the present invention is that the human body local cleaning that can secure the amount of hot water that can save energy with little heat loss in a hot water storage tank, etc. The object is to provide a device and a toilet device provided with the device.

  In the human body local cleaning device of the present invention, the heating means for supplying the cleaning hot water to the local cleaning nozzle is passed through the heating means at a flow rate suitable for local cleaning, and the cleaning water passes through the heating means. It is heated to warm water suitable for cleaning, and does not run out even if the cleaning water is used at the above flow rate. Can be washed comfortably, and a sufficient washing feeling can be obtained.

  In the present invention, while passing through the heating means for supplying the hot cleaning water to the local cleaning nozzle, it is possible to obtain a hot water having an amount and temperature suitable for cleaning throughout the cleaning without using wasteful energy. It is possible to provide a human body local cleaning device that provides a feeling and a toilet device that is provided in a toilet.

  Since the object of the present invention described above can be achieved by using the configuration described in each claim as an embodiment, the effects of the configuration will be described together with the configuration of each claim. The specific terms that require explanation in the configuration will be described in detail in the embodiment of the present invention by adding a detailed explanation.

The first invention is a water supply pipe through which cleaning water circulates;
Heating means for heating cleaning water supplied from the water supply pipe;
At least one temperature detector for detecting the temperature of the washing water heated by the heating means;
Control means for controlling the heating amount of the heating means based on the temperature detected by the temperature detector;
A local cleaning nozzle for spraying hot water cleaning water supplied from the heating means toward the human body local part;
The heating means includes a heating element composed of two substantially linear cylindrical sheathed heaters,
A heating element case the two sheathed heater is furnished with substantially parallel through, and having an inlet and an outlet of the wash water,
The heating element case includes a partition wall provided between the two sheathed heaters;
With
A cross section is annular between the sheathed heater and the heating element case, forming a substantially U-shaped flowing water heating passage,
End surface members provided so as to cover both ends of the heating element case through which the sheathed heater has penetrated;
A plate member holding an elastic holding member so that both ends of the sheathed heater are movably supported when the sheathed heater expands and contracts in the axial direction due to thermal expansion;
With
The sheathed heater is a human body local cleaning device having a maximum watt density of approximately 30 W / cm 2 to 50 W / cm 2.

  Thereby, the washing water supplied from the water supply pipe is heated by the heating means to become warm water, and is ejected from the local washing nozzle toward the local body part. The heating means secures a flow rate suitable for local cleaning of the washing water, heats the washing water to a temperature suitable for local washing while passing through the heating means, and does not run out of hot water even if washing is continued at the flow rate. The configuration does not require a hot water storage tank as in the conventional case, there is almost no heat dissipation loss when not in use, etc., and while achieving energy saving, it is possible to perform cleaning with sufficient cleaning feeling and multiple people are continuous And even if you wash it, you can make it without worrying about running out of hot water.

  Further, a water supply pipe through which the cleaning water flows, a heating means for heating the cleaning water supplied from the water supply pipe, at least one temperature detector for detecting the temperature of the cleaning water heated by the heating means, Control means for controlling the amount of heating of the heating means based on the temperature detected by the temperature detector, and a local washing nozzle for ejecting hot water wash water supplied from the heating means toward the local body part, the heating means The cleaning water is passed at a flow rate suitable for local cleaning, and is heated to a temperature suitable for local cleaning while the cleaning water passes through the heating means, and the cleaning water is used at a flow rate of approximately 1 liter per minute. It is a human body local cleaning device that is configured so that hot water does not run out even if it continues.

  Thereby, the washing water supplied from the water supply pipe is heated by the heating means to become warm water, and is ejected from the local washing nozzle toward the local body part. And by the structure of the heating means, the washing water has a flow rate of about 1 liter per minute, which is a flow rate familiar to most people in the conventional hot water storage type for local washing, and for local washing while passing through the heating means. Since it is heated to a suitable temperature and does not run out of hot water even if washing is continued at the above flow rate, it is possible to perform washing with sufficient washing feeling while saving energy with almost no heat loss when washing is not used. At the same time, even if multiple people wash continuously, there is no worry of running out of hot water.

  Further, a water supply pipe through which the cleaning water flows, a heating means for heating the cleaning water supplied from the water supply pipe, at least one temperature detector for detecting the temperature of the cleaning water heated by the heating means, Control means for controlling the amount of heating of the heating means based on the temperature detected by the temperature detector, and a local washing nozzle for ejecting hot water wash water supplied from the heating means toward the local body part, the heating means The wash water of a flow rate suitable for local washing is passed, and the wash water is heated to a temperature suitable for local washing while passing through the heating means, and even if the washing water is continuously used at the flow rate, the hot water runs out. Without being carried out, it is a human body local washing device made into the composition which can carry out a thermal response so that the temperature of the washing water may become stable.

Thereby, the washing water supplied from the water supply pipe is heated by the heating means to become warm water, and is ejected from the local washing nozzle toward the local body part. The heating means can respond to heat so that the temperature of the washing water becomes stable, so that even if the user changes the set flow rate or the set temperature of the washing water, for example, overshoot and undershoot that cause problems will occur. In addition, the flow rate and temperature suitable for local cleaning are ensured, and the water is heated to warm water suitable for local cleaning while passing through the heating means. It is possible to perform cleaning with sufficient cleaning feeling while being able to respond to heat so that the temperature stabilizes and there is almost no heat loss when washing is not used, etc. It can be made so that there is no worry of running out of water.

Further, the heating means is a heating element constituted by two substantially linear cylindrical sheathed heaters, the two sheathed heaters are provided so as to penetrate substantially in parallel, and the heating element has an inlet and an outlet for cleaning water. The case and the heating element case include a partition wall provided between the two sheathed heaters, and a substantially U-shaped flowing water heating passage having an annular cross section between the sheathed heater and the heating element case The end surface member provided so as to cover both ends of the heating element case through which the sheathed heater penetrates and the sheathed heater is supported so that both ends of the sheathed heater can be moved when the sheathed heater expands and contracts due to thermal expansion in the axial direction. And a plate member holding an elastic holding member .

As a result, the washing water flows in from the inlet of the heating element case, is heated by exchanging heat on the surface of the sheathed heater while passing through the flowing water heating passage, flows out from the outlet of the heating element case, and is suitable for local cleaning. And is heated to a temperature suitable for local cleaning. The sheath tube, which is the outer surface of the sheathed heater, is made of metal, and there is no risk of cracking even if the heater is heated with a large amount of power. An input of about 1.5 kW to 2.5 kW is possible, and the flow rate is about 1 liter per minute. The washing water can be heated to a temperature suitable for local washing, for example, 35 ° C. to 40 ° C. hot water, and continuous hot water can be discharged without running out of hot water. In this case, since both ends of the sheathed heater are movably supported, both ends of the sheathed heater are movable even if the sheathed heater expands and contracts due to thermal expansion in the axial direction.

  Moreover, it is a human body local washing | cleaning apparatus which set the maximum watt density to about 30W / cm2-50W / cm2.

  Thereby, the electrical input to the sheathed heater is controlled by the control means based on the temperature signal of the washing water detected by the temperature detector. By using a sheathed heater with a maximum watt density greater than about 30 W / cm2, the thermal response of the sheathed heater (in other words, easy to heat and cool) is fast, and there is no problem level overshoot or undershoot. The hot water temperature control of the washing water becomes possible. Further, by using a sheathed heater having a maximum watt density smaller than about 50 W / cm 2, the life of the sheathed heater can be substantially equivalent to the intended service life without disconnection.

  A second invention is a human body local cleaning device in which the maximum heating amount is set to 1.5 kW to 2.5 kW in the heating means described in the first invention.

  As a result, the heating means controlled by the control means that transmits a control signal based on the temperature signal of the washing water detected by the temperature detector can be used, for example, regardless of the difference in the temperature of the washing water supplied from the water supply pipe. Wash water having a flow rate of approximately 1 liter can be heated to a temperature suitable for local washing, for example, warm water of 35 ° C. to 40 ° C.

  A third aspect of the present invention is the human body local cleaning device in the heating means according to the first or second aspect of the present invention, wherein the temperature rise rate of the heated cleaning water is set to a maximum gradient of at least about 10 K per second. Thereby, the heating means controlled by the control means for transmitting the control signal based on the temperature signal of the washing water detected by the temperature detector is cleaned at a maximum temperature increase rate of at least about 10 K (Kelvin) per second. High-speed thermal responsiveness that can heat water prevents problematic overshoots and undershoots, and a flow rate suitable for local cleaning that passes through the heating means, for example, 0.7 to 1.5 liters / minute. Can be washed stably with warm water suitable for local washing, for example, at a temperature of 35 ° C. to 40 ° C.

4th invention is the toilet apparatus which provided the human body local washing | cleaning apparatus in any one of 1st invention from 3rd invention in the toilet bowl. As a result, the toilet device can be washed comfortably with a small amount of energy-saving, and a hot water having an amount and temperature suitable for cleaning can be continuously obtained during use.

  The term “hot water out” as used in the present embodiment means that the temperature of the washing water is lowered or the amount is reduced during the local washing with the washing water having an amount and temperature suitable for washing. This is a state in which the user feels uncomfortable.

  Hereinafter, the human body local cleaning apparatus of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 is a perspective view showing a human body local cleaning device in a state provided in a toilet according to Embodiment 1 of the present invention, FIG. 2 is a configuration diagram of the human body local cleaning device, and FIG. 3 is a human body local cleaning device. 4 (a) is a cross-sectional view taken along line AA in FIG. 3, and FIG. 4 (b) is a cross-sectional view taken along line BB in FIG. 4 (a). FIG. 4C is a cross-sectional view taken along the line CC of FIG.

  As shown in FIGS. 1 to 4, a human body local cleaning device 2 is mounted on the toilet 1. The tank 3 is connected to a water pipe, and supplies cleaning water for discharging filth into the toilet 1 after the stool. The human body local washing apparatus 2 is composed of a main body 2a, a remote controller 2b, a toilet seat 2c, and a lid 2d. A toilet seat 2c and a lid 2d are attached to the main body 2a so as to be freely opened and closed.

  Further, the main body 2a is provided with a cleaning water supply mechanism including a nozzle portion 4 as a local cleaning nozzle, and a control portion 5 as a control means constituted by a microcomputer or the like is incorporated. The control unit 5 of the main body 2a controls the washing water supply mechanism based on a signal transmitted by operating the remote controller 2b.

  And the main-body part 2a is the control part 5, the branch tap 6, the strainer 7, the check valve 8, the constant flow valve 9, the water stop solenoid valve 10 as the water stop means, the flow sensor 11, and the instantaneous hot water as the heating means. It comprises a heat exchanger 12, a temperature sensor 13a as a temperature detector, a thermostat 13b, a temperature fuse 13c, a pump 14, a switching valve 15 and an anal nozzle 16, a bidet nozzle 17 and a nozzle cleaning nozzle 18 which are nozzle parts 4. .

  The branch faucet 6 is connected to the water pipe 19 to supply cleaning water to the cleaning water supply mechanism of the main body 2a, and the power source of the control unit 5 is 200V for household use from the power outlet 20 of the toilet room. Is supplied. Further, a strainer 7, a check valve 8, a constant flow valve 9, a water stop solenoid valve 10, and a flow sensor 11 are connected to a pipe 21 as a water supply pipe connected between the branch tap 6 and the instantaneous hot water heat exchanger 12. The temperature sensor 13a is inserted in order. Further, a thermostat 13 b and a pump 14 are inserted in a pipe 22 as a water supply pipe connected between the instantaneous hot water heat exchanger 12 and the switching valve 15.

  Purified water is supplied from the water pipe 19 to the strainer 7 as washing water through the branch tap 6 to remove dust and impurities. Next, the check valve 8 prevents the reverse flow of the cleaning water in the pipe 21, and the constant flow valve 9 keeps the flow rate of the cleaning water flowing in the pipe 21 constant. A relief pipe 23 is connected between the pump 14 and the switching valve 15, a relief water pipe 24 is connected between the water stop solenoid valve 10 and the flow rate sensor 11, and a relief valve 25 is interposed in the relief pipe 23. It is inserted.

The relief water pipe 24 discharges cleaning water that is not sucked by the pump 14 out of the cleaning water supplied with the flow rate adjusted by the constant flow valve 9, and a predetermined back pressure is applied to the pump 14 regardless of the water supply pressure. To work. The relief valve 25 is opened when the pressure on the downstream side of the pump 14, particularly the downstream side of the pump 14, exceeds a predetermined value, and prevents problems such as damage to the equipment and disconnection of the hose at the time of abnormality. The constant flow valve 9 detects the flow rate of the wash water flowing through the pipe 21 and gives a detected flow rate value to the control unit 5, and the temperature sensor 13a detects the incoming temperature of the wash water flowing through the pipe 21 and sets the detected temperature value. This is given to the control unit 5.

  The instantaneous hot water heat exchanger 12 heats the washing water to a predetermined temperature while passing the washing water supplied through the pipe 21 based on a control signal from the control unit 5. The thermostat 13b measures the temperature of the washing water heated by the instantaneous hot water heat exchanger 12, and gives an over-temperature signal to the control unit 5 when the temperature exceeds a predetermined temperature. Shut off the power supply to The thermal fuse 13c detects the temperature of the heating element of the instantaneous hot water heat exchanger 12, and blows off when the temperature exceeds a predetermined temperature to cut off the power supply to the heating element.

Pump 14 pumped to the switching valve 15 have groups Dzu to a control signal from the control unit 5 the washing water heated by the instantaneous hot water heat exchanger 12, while the switching valve 15 based on a control signal from the control section 5 Then, the cleaning water is supplied to any one of the anal nozzle 16, the bidet nozzle 17 and the nozzle cleaning nozzle 18, and the cleaning water is ejected from the selected one nozzle.

  The control unit 5 is based on the wireless signal transmitted in response to the instruction from the remote controller 2b, the flow rate detection signal from the flow rate sensor 11, the incoming water temperature detection signal from the temperature sensor 13a, and the abnormal temperature signal from the thermostat 13b. A control signal is given to the water stop solenoid valve 10, the instantaneous hot water heat exchanger 12, the pump 14, and the switching valve 15 to control the entire operation of the human body local cleaning device 2.

  In particular, in the present embodiment, the instant hot water heat exchanger 12 is used for washing throughout the use with a small amount of energy while passing through the instantaneous hot water heat exchanger 12 that supplies the washing hot water to the nozzle unit 4 in the human body local washing apparatus 2. In order to obtain a sufficient amount of washing feeling by obtaining hot water having an appropriate amount and temperature so that the hot water does not run out, the following structure is provided.

  The instantaneous hot water heat exchanger 12 includes a cylindrical sheathed heater 26 as a heating element, and a heating element case 29 that includes the sheathed heater 26 and has an inlet 27 and an outlet 28 for cleaning water. The heating element case 29 includes two sheathed heaters 26 arranged in parallel, a partition wall 30 provided between them, and an annular section between the sheathed heaters 26 and a substantially U-shaped fluidized water heating. A passage 31 is formed.

  Accordingly, the wash water flowing in from the inlet 27 located at one end of the heating element case 29 flows through one of the flowing water heating passages 31 as shown by the arrows, and makes a U-turn in the middle to pass through the other flowing water heating passage 31. Heat is exchanged with the surface of the sheathed heater 26 that generates heat while passing through the fluidized water heating passage 31 that flows and reaches the outlet 28 to become hot water.

  The flow rate of the flowing water heating passage 31 is, for example, 0.7 to 1.5 liters / minute, preferably 1 liter per minute as a flow rate at which a sufficient washing feeling can be obtained, depending on individual differences. On the other hand, the sheathed heater 26 has a temperature suitable for local washing, for example, 35 ° C. to 35 ° C., while 1 liter of washing water with an incoming water temperature of 5 ° C. to 20 ° C. passes through the flowing water heating passage 31. In order to be heated to an arbitrary temperature in the range of 40 ° C., the maximum heating amount is set to 1.5 kW to 2.5 kW.

  That is, as shown in FIG. 5 in which the vertical axis represents the flow rate of hot water discharged from the outlet 28 and the horizontal axis represents the input power to the sheathed heater 26, the incoming temperature of the wash water assumed in winter is 5 ° C. In some cases (heating of 35K is required), heating of about 1 liter / min of wash water to 40 ° C. by the instantaneous hot water heat exchanger 12 requires about 2.5 kW of heating.

  In addition, when the incoming water temperature is 20 ° C. assumed in the intermediate period or summer (20K heating is required), about 1.5 kW for heating the wash water of 1 liter / min to 40 ° C. by the instantaneous hot water heat exchanger 12 The heating amount is required.

  In other words, by setting the maximum heating amount to 1.5 kW to 2.5 kW, in the winter, summer, intermediate period, etc., the user who is familiar with the cleaning using the hot water storage type human body local cleaning device is the instantaneous type human body local Even when a product is replaced by a cleaning device, it is possible to use local cleaning that does not run out of hot water with cleaning water having a flow rate of 1 liter / minute equivalent to that of a hot water storage type human body local cleaning device.

  By the way, in the warm water washing toilet seat equipped with the human body local washing apparatus so far, most of the hot water type is flush water with a flow rate of about 1 liter / min, and most of the instantaneous type has a flow rate of about 0. Wash water at 5 liters / minute.

  In the figure, 32 is an end face member provided so as to cover both ends of the heating element case 29, and 33 is an elastic holding member that is movably supported when the sheathed heater 26 expands and contracts due to thermal expansion in the axial direction. A plate member for holding the O-ring 34 and provided between the heating element case 29 and the end face member 32.

  In the above-described embodiment, the control unit 5 that has received a local cleaning signal instructed from the remote controller 2b performs control according to a program that executes a stored control sequence. That is, the control unit 5 opens the water stop electromagnetic valve 10, energizes the sheathed heater 26, and drives the pump 14 and the switching valve 15. And the electric current of the sheathed heater 26 is controlled by taking in the signals detected by the flow sensor 11 and the temperature sensor 13a, respectively.

  Accordingly, the wash water flowing in at an amount of about 1 liter per minute from the inlet 27 of the instantaneous hot water heat exchanger 12 is 1.5 kW to 2 at a maximum heating amount that is generated while passing through the flowing water heating passage 31. Heat exchanged with a 5 kW sheathed heater 26, controlled to a temperature range of 35 ° C. to 40 ° C., and flowed out, pumped by a pump 14, for example, strongly and weakly, from a nozzle portion 4 selected by a switching valve 15 Blow out and clean the area.

  Particularly in this embodiment, the hot water heat exchanger 12 is energized only when it is used for local cleaning, rather than the hot water storage heater that is always warmed by the heater, in the hot water tank. Therefore, there is almost no heat dissipation loss such as during the heat retention, as in the conventional hot water storage type, and it is possible to clean hot water with less energy using less energy, and a hot water storage tank that stores cleaning water is unnecessary, so it can be downsized. The device can be made compact and neatly designed.

  Further, a user who is familiar with the conventional hot water storage type human body local cleaning apparatus can pass the cleaning water of an amount of about 1 liter per minute, which is the optimal amount for local cleaning, to the instantaneous hot water heat exchanger 12 by simply passing it through the instantaneous hot water heat exchanger 12. Since it is possible to continue supplying hot water controlled at an arbitrary temperature of -40 ° C to 40 ° C, a sufficient feeling of cleaning can be obtained for the user, and when continuous cleaning is desired, for example, 30 seconds to 2 minutes Even if the cleaning is continued for a long time or multiple people use it one after another, the hot water kept in the hot water storage tank is not used, so that the stable flow rate and temperature without running out of hot water. Local cleaning can be performed with hot water.

  Furthermore, since the optimum amount of washing water for local washing can be stably obtained, even if the pump 14 that gives strong and weak urging to the washing water ejected from the nozzle part 4 and obtains a feeling of washing is omitted, Since a sufficient feeling of cleaning can be obtained and the cost and space of the pump 14 can be reduced, it is possible to provide a more compact human body local cleaning apparatus at a more reasonable price.

(Embodiment 2)
The human body local cleaning apparatus of the present embodiment differs from the invention of the first embodiment in the configuration of the sheathed heater of the instantaneous hot water heat exchanger that heats the cleaning water, and the other configurations and operations shown in FIGS. Detailed description of the same effect will be omitted, and different points will be mainly described.

  The instantaneous hot water heat exchanger 12 passes a flow rate suitable for local cleaning, for example, 0.7 to 1.5 liters / minute, preferably 1 liter of cleaning water per minute, and the cleaning water passes through the flowing water heating passage 31. In order to heat the hot water in a range suitable for local cleaning, for example, in the range of 35 ° C. to 40 ° C. during the passage, and to make a thermal response so that the hot water does not run out even if the cleaning water is continuously used at the flow rate, The temperature rise rate of the washing water is about 10K or more per second with the maximum gradient. The maximum watt density of the sheathed heater 26 is approximately 30 W / cm2 to 50 W / cm2.

  That is, in FIG. 6 where the vertical axis indicates the temperature of the cleaning water and the horizontal axis indicates time, the temperature increase graph of the cleaning water when the watt density of the sheathed heater 26 is 20 W / cm 2, 30 W / cm 2, 38 W / cm 2, 50 W / cm 2. As shown in FIG. 7, in the case of a sheathed heater having a maximum watt density of 30 W / cm 2, the vertical axis indicates the temperature of the wash water discharged from the outlet 28, and the horizontal axis indicates time, as shown in FIG. In response to the control of the control unit 5 without undershooting or overshooting, it is possible to quickly respond to heat and stably maintain hot water having an arbitrary temperature of 35 ° C. to 40 ° C.

  More specifically, in the experiment, in the case of a sheathed heater having a maximum watt density of 20 W / cm 2, the sheath tube (pipe portion of the sheathed heater 26) and the gap between them are compared with the heating value of the heater wire inside the sheathed heater 26. The heat capacity of a certain insulating powder or the like is relatively large, and the sheathed heater 26 itself is difficult to heat and cool, so-called thermal response is slow, resulting in a delay in response to temperature control. When changed, there was a problem that overshoot and undershoot were inevitably large and could not be controlled to a stable hot water temperature of about ± 1 ° C.

  However, in the present embodiment, in the case of the sheathed heater 26 having a maximum watt density of 30 W / cm 2, the heat capacity of the entire sheathed heater 26 is relatively small with respect to the heat generation amount of the heater wire, and the response delay is also small. As a result, it has become possible to control the water temperature almost stably.

  As described above, as the maximum watt density of the sheathed heater 26 is increased, the response is quicker and a stable hot water temperature is obtained. Therefore, the reason why the upper limit value of the maximum watt density of the sheathed heater 26 is set to 50 W / cm 2 is that, in the case of the sheathed heater 26 exceeding 50 W / cm 2 as a result of the life endurance test, the target life time equivalent to about 10 years can be secured. This is because it was found that the heater was disconnected in a short period of time.

  In terms of the maximum gradient of the temperature rise rate of the cleaning water to be heated, in the graph shown in FIG. 6, the maximum gradient of the watt density of about 30 W / cm2 to 50 W / cm2 is about 10 K / sec to 27 K / sec. For this reason, the target hot water temperature stability can be obtained by setting the maximum gradient of the temperature rise rate of the cleaning water to be heated to about 10 K / sec to 27 K / sec.

As described above, in the present embodiment, the same effect as that of the invention of the first embodiment can be expected, and the sheathed heater has a cleaning water temperature that is optimum for local cleaning, for example, 35 ° C. to 40 ° C. It is possible to easily respond to the control of the control unit to the hot water in the range so that undershoot and overshoot do not occur, and a comfortable cleaning feeling can be obtained with the clean hot water having a stable temperature.

  Note that the definition of the watt density of the sheathed heater 26 described above is the same as a commonly used definition, but will be described with reference to FIG. In the cross-sectional view of the sheathed heater shown in FIG. 8, a portion between energization terminals becomes a heat generating portion of the heater wire, which is a so-called heater effective length. The watt density is a numerical value obtained by dividing the electric power applied to the sheathed heater by the sheathed heater surface area at the heater effective length. That is, the electric power per unit surface area in the heater effective length. For example, the watt density (W / cm 2) when the sheathed heater has a cylindrical shape is a numerical value obtained by dividing the electric power (W) by the heater diameter (cm) × the heater effective length (cm) × π.

  Further, the control unit 5 automatically adjusts the electric power applied to the sheathed heater 26 in accordance with the washing water temperature, the washing water flow rate, or the like set by the remote controller 2b by the user. Accordingly, the watt density of the sheathed heater 26 is also adjusted. The maximum watt density in the above description is the watt density when the electric power applied to the sheathed heater 26 is maximized in order to set the temperature of the cleaning water to the set temperature.

  When the instant hot water heat exchanger 12 of the hot water washing toilet seat was developed several years ago, a method using a sheathed heater 26 as a heating element was tried at that time, but at this time, a practical temperature control characteristic could be realized. There wasn't. After all, the method that was realized at that time was a method using a ceramic heater. At that time, with the sheathed heater method, when the user changed the set temperature and set flow rate of the wash water, the hot water temperature was large, causing overshoot and undershoot, and could not be controlled. The main cause was that the heat capacity of the sheathed heater was larger than that of the ceramic heater. In other words, the sheathed heater at that time is harder to heat and harder to cool than the ceramic heater at that time, so the thermal response becomes slow, the response delay of the so-called automatic control system increases, and overshoot and undershoot occur, preventing it There was no help for it.

  However, in the present embodiment, it has been found that the factor that can be realized by the sheathed heater method is that the heat capacity of the sheathed heater, which has been large in the past, has to be reduced, and the conditions and the like have been clarified. by. One factor that reduces the heat capacity and quickens the thermal response is the watt density described above. By making the maximum watt density a sheathed heater larger than about 30 W / cm <2>, it responds quickly to the heat of 35 [deg.] C. to 40 [deg.] C. according to the control of the control unit 5 without causing undershoot or overshoot. It was found that it can be stably maintained in hot water at an arbitrary temperature of ° C.

  In the first place, a sheathed heater with a watt density of 30 W / cm 2 is an insane watt density from the common sense of a sheathed heater several years ago and now. It is a watt density comparable to several times the allowable watt density of each company, as is clear from the catalogs and technical data of each sheathed heater manufacturer. Usually, the allowable watt density of the sheathed heater is about 4 to 8 W / cm 2. The allowable watt density is determined from the viewpoint of heater life.

  In such an insane watt density sheathed heater, it became possible to provide the human body local cleaning device of the present invention by grasping the technology that enables the heater life equivalent to the target number of years. . The main technology is that the heater unit length or the average temperature per unit volume of the sheathed heater 26 is relatively low with respect to the total calorific value of the sheathed heater 26, so that even a sheathed heater with a high watt density has a long heater life. It has succeeded in securing. In other words, although the heater wire unit length or the average temperature per unit volume is kept relatively low by conditions such as the thickness of the heater wire, the winding diameter and winding pitch of the spiral heater wire, etc. By using the sheathed heater 26 having a large overall calorific value, the instantaneous hot water heat exchanger 12 having a long life, a small heat capacity and excellent thermal response can be realized.

  In each of the above embodiments, the sheathed heater 26 is used as a heating element. However, the present invention is not limited to this. For example, even if a ceramic heater is used, the same effect as that of the present invention can be expected. Also, the number or shape of the sheathed heaters 26 is not limited to a cylindrical shape, and may be one or several, triangular prisms, quadrangular prisms, or the like.

  In the above embodiment, the control unit 5 controls the temperature of the sheathed heater 26 of the instantaneous hot water heat exchanger 12 by feedback control. However, the present invention is not limited to this. In addition, the temperature of the sheathed heater 26 may be controlled by feedforward control or the like, or a combination of feedback control and feedforward control may be used.

  As described above, the human body local cleaning device of the present invention can obtain a washing hot water having an amount and temperature suitable for cleaning throughout the cleaning without wastefully using energy, and can obtain a sufficient feeling of cleaning. The present invention can be applied to a cleaning device and a toilet device provided with the same in a toilet.

The perspective view of the human body local cleaning apparatus provided in the toilet bowl in Embodiment 1 of this invention Configuration diagram of human body local cleaning apparatus according to Embodiment 1 The top view of the instantaneous hot water heat exchanger of the human body local cleaning apparatus in Embodiment 1 (A) A sectional view taken along the line AA in FIG. 3 (b) A sectional view taken along the line BB in FIG. 4 (a) (c) A sectional view taken along the line C-C in FIG. Heating characteristic chart of instantaneous hot water heat exchanger of human body local cleaning device in Embodiment 1 The characteristic view which shows the washing water temperature rise of the instantaneous warm water heat exchanger of the human body local washing apparatus in Embodiment 2 of this invention The characteristic view which shows the washing water temperature control response of the instantaneous warm water heat exchanger of the human body local washing | cleaning apparatus in Embodiment 2 Sectional drawing for the definition explanation of the watt density of the sheathed heater in Embodiment 2 Schematic configuration diagram of a conventional hot water storage type human body local cleaning device

1 Toilet 4 Nozzle (Local cleaning nozzle)
5 Control unit (control means)
12 Instantaneous hot water heat exchanger (heating means)
13a Temperature sensor (temperature detector)
21, 22 Piping (water supply pipe)
26 Seeds heater (heating element)
27 Inlet 28 Outlet 29 Heating element case 31 Fluidized water heating passage

Claims (4)

A water supply pipe through which wash water circulates;
Heating means for heating cleaning water supplied from the water supply pipe;
At least one temperature detector for detecting the temperature of the washing water heated by the heating means;
Control means for controlling the heating amount of the heating means based on the temperature detected by the temperature detector;
A local cleaning nozzle for spraying hot water cleaning water supplied from the heating means toward the human body local part;
The heating means includes a heating element composed of two substantially linear cylindrical sheathed heaters,
A heating element case the two sheathed heater is furnished with substantially parallel through, and having an inlet and an outlet of the wash water,
The heating element case includes a partition wall provided between the two sheathed heaters;
With
A cross section is annular between the sheathed heater and the heating element case, forming a substantially U-shaped flowing water heating passage,
End surface members provided so as to cover both ends of the heating element case through which the sheathed heater has penetrated;
A plate member holding an elastic holding member so that both ends of the sheathed heater are movably supported when the sheathed heater expands and contracts in the axial direction due to thermal expansion;
With
The sheathed heater is a human body local cleaning device having a maximum watt density of approximately 30 W / cm2 to 50 W / cm2. 2. The human body local cleaning apparatus according to claim 1, wherein the heating means has a maximum heating amount of about 1.5 kW to 2.5 kW. 3. The human body local cleaning apparatus according to claim 1, wherein the heating means has a maximum temperature increase rate of about 10 K per second at a maximum gradient. 4. A toilet apparatus comprising the toilet body cleaning device according to any one of claims 1 to 3 in a toilet.

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