JP2000054463A - Sanitary washing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the temperature fluctuation of wash water in a sanitary washing device with a heating means for heating wash water while making wash water flow. SOLUTION: In a sanitary washing device, an instantaneous type heat exchanger 40 and a temperature compensator 110 are provided in a passage extended into a position where wash water supplied from the outside is jetted from a nozzle 70. The temperature compensator 110 is a tank that can store a small quantity of wash water. Heated wash water is jetted from the nozzle 70 after being mixed with wash water stored in the temperature compensator 110. The temperature fluctuation of wash water can be suppressed by this mixing. In prewashing before main washing, wash water of higher temperature than assigned temperature is made to flow. The temperature of stored wash water can therefore be sufficiently heightened in a short time. As a result, wash water of almost constant assigned temperature is jetted in main washing so as to realize comfortable washing.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sanitary washing apparatus for washing a part of a human body by ejecting washing water from an ejection port.

[0002]

2. Description of the Related Art Conventionally, there has been known a sanitary washing device for ejecting washing water to wash a human body part. In such a sanitary washing device, in order to perform comfortable washing, the washing water is often used after being heated to warm water close to the body temperature. As a method of warming the washing water, like a so-called instantaneous water heater,
There is a method in which heating is performed by a heater to a predetermined temperature while passing water. Such a method has an advantage that the heating unit for cleaning water can be reduced in size.

[0003]

However, it is difficult to keep the temperature of the washing water constant in the hot watering by the above-mentioned method for the following reasons. The washing water supplied from the outside to the sanitary washing device does not always have a constant water temperature and water amount. Since the sanitary washing device is intended for use in a general household, the heater capacity is limited to a level that can be used with a household power supply. Therefore, in many cases, the system does not have the ability to heat the washing water with a response corresponding to the fluctuation of the water temperature and the water amount. Further, the heater is heated during heating and reaches a thermal equilibrium state. The amount of heat stored by the heater itself changes with time. The relationship between the amount of power supplied to the heater and the amount of heating of the cleaning water varies depending on the change in the amount of heat stored in the heater. Accordingly, even when the heater has a sufficient capacity as a calorific value, a response delay often occurs in the temperature control of the washing water in accordance with the change in the heat storage amount.

In recent years, there has been a tendency to use washing water mixed with air. In such an apparatus, the amount of washing water passing through the pipe is reduced by the amount of air. This is equivalent to the relatively large capacity of the heater, and the temperature of the washing water is apt to greatly change with a small amount of heat. Also, it is very difficult to keep the amount of air mixed in constant, and when using cleaning water mixed with air, the amount of water tends to fluctuate with the amount of air mixed. In such a sanitary washing apparatus, the temperature of the washing water sometimes fluctuates greatly for these reasons.

[0005] In the conventional sanitary washing apparatus, the temperature of washing water sometimes fluctuates during washing for the above-mentioned reason. The user sometimes felt uncomfortable due to a change in the temperature of the washing water. To control fluctuations in the temperature of washing water by controlling the heater, it is necessary to combine feed-forward control in addition to normal feedback control, or to provide a plurality of temperature sensors. Could be another issue.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and in a sanitary washing apparatus having a heating means for heating the wash water while passing water, provides a sanitary washing apparatus capable of suppressing temperature fluctuation of the wash water. The purpose is to:

[0007]

Means for Solving the Problems and Their Functions and Effects In order to solve at least a part of the problems, the present invention has the following constitution. The sanitary washing device of the present invention is a sanitary washing device for washing a human body part by ejecting washing water supplied from the outside from a spout, and washing the externally supplied washing water from the spout. In the path, a heating means for heating the washing water while passing the washing water, and a temperature compensation mechanism for compensating for fluctuations in the temperature of the washing water by exchanging heat between the washing waters are provided in series. That is the gist.

According to such a sanitary washing device, the temperature fluctuation of the washing water flowing into the heating means or the washing water flowing out of the heating means can be compensated by the temperature compensation mechanism. If the temperature compensation mechanism is provided upstream of the heating means, the temperature of the washing water flowing into the heating means can be kept substantially constant. Therefore, the control of the heating means becomes easy, and the temperature of the washing water can be kept almost constant. If the temperature compensating mechanism is provided downstream of the heating means, the fluctuation caused at the time of heating can be compensated and the temperature of the washing water can be kept almost constant. As a result, according to the sanitary washing device of the present invention, the temperature of the washing water spouted from the spout can be kept substantially constant, and the local part can be washed comfortably. Moreover, the temperature compensation mechanism in the present invention compensates for temperature fluctuations by exchanging heat between the cleaning waters. Therefore, there is no need to supply energy externally to compensate for temperature fluctuations.

According to the sanitary washing device of the present invention, the temperature of the jetted washing water can be kept substantially constant without using so-called hot water storage type heating means. Therefore, the size of the sanitary washing device can be reduced. Further, in the case of the hot water storage type heating means, it becomes difficult to keep the temperature constant as the washing water stored in the tank is consumed. According to the sanitary washing device of the present invention, it is possible to keep the temperature substantially constant regardless of the amount of washing water used.

As described above, the temperature compensation mechanism can be provided on the upstream side of the heating means, but is preferably provided on the downstream side of the heating means. This makes it possible to compensate not only for the temperature fluctuation of the cleaning water supplied from the outside but also for the temperature of the cleaning water to be spouted, including the temperature fluctuation caused by the control delay of the heating means. Therefore,
The temperature of the jetted washing water can be more accurately maintained at the predetermined temperature.

It is desirable that the temperature compensating mechanism is provided near the heating means. In this case, the length of the pipe connecting the heating means and the temperature compensation mechanism is shortened, and loss of heat energy in the pipe can be suppressed.
In addition, when the heating means is controlled using the temperature of the washing water in the temperature compensation mechanism, the responsiveness of the control can be improved.

Here, the temperature compensating mechanism is, for example, a mixing section capable of storing a predetermined volume of washing water, and capable of mixing and discharging the inflowing washing water and the stored washing water. Things.

Consider a case where the temperature of the washing water flowing into the temperature compensation mechanism fluctuates. When the washing water is mixed with the washing water stored in the temperature compensation mechanism, the temperature fluctuation of the inflowing washing water is averaged as the temperature fluctuation of the entire stored washing water. As a result, the temperature fluctuation of the inflowing cleaning water is suppressed, and the cleaning water having a substantially constant temperature is discharged. According to the temperature compensation mechanism described above, the temperature of the washing water can be compensated for in this way with a very simple configuration.
Here, the capacity of the temperature compensation mechanism can be experimentally or analytically set to a capacity capable of sufficiently suppressing the temperature fluctuation based on the cycle of the temperature fluctuation of the washing water.

[0014] In this case, the apparatus may further include a replacement means for replacing the washing water stored in the mixing section with washing water having substantially the same temperature as the designated temperature prior to washing of the human body part. it can.

[0015] The washing water stored in the mixing section may be different from the designated temperature immediately after the start of washing. If the replacement means is provided, washing water at a designated temperature can be stored in the mixing section at the time of starting the washing of the human body part. Therefore, the local part can be comfortably cleaned from the beginning of the cleaning.

The replacement of the washing water can be realized in various sequences. For example, all the washing water stored in the mixing section may be once discharged, and thereafter, may be filled with washing water at a designated temperature. The cleaning water at the designated temperature may flow into the washing water stored in the mixing section to gradually approach the designated temperature.

When the temperature of the stored washing water is lower than the designated temperature, the replacing means flows the washing water having a temperature higher than the designated temperature into the mixing section. By doing so, when the temperature of the stored washing water is higher than the designated temperature, the washing water having a temperature lower than the designated temperature flows into the mixing section. Thereby, it may be a means for performing the replacement. In this case, the temperature of the washing water stored in the mixing section can be quickly set to the specified temperature.

In this case, it is desirable that the temperature Tin (° C.) of the washing water flowing in at the time of replacement be substantially the same as the temperature given by the following equation (1). Tin = {Tset · exp (Q · t / V) −T0} / {exp (Q · t / V) −1} (1) where Tset is the specified temperature (° C.) T0 is the storage Washing water temperature (° C.) Q: Flow rate of washing water (liter / sec) t: Target time required for replacement (sec) V: Volume of mixing section (liter) If the washing water at the temperature Tin determined by the above equation is used, the washing water in the mixing section can be set to the specified temperature at the target time t.

The physical meaning of the above equation will be described. When the washing water at the temperature Tin flows into the mixing section in which the washing water at the temperature T is stored, the fluctuation E1 of the heat energy generated in the mixing section due to the washing water flowing in by Δt (sec) causes the density of the water to decrease. If ρ and the specific heat are Cp, it is given by the following equation (2). E1 = ρ · Cp · (Tin−T) · Q · Δt (2)

On the other hand, assuming that the temperature of the mixing section has changed by ΔT due to the inflow of the washing water, the heat energy E2 required for the change is given by the following equation (3). E2 = ρ · Cp · ΔT · V (3)

Since the heat energies E1 and E2 are equal,
The following equation (4) is obtained from the above equations (2) and (3). ρ · Cp · ΔT · V = ρ · Cp · (Tin−T) · Q · Δt; ΔT / (T−Tin) = − Q · Δt / V; (4)

The temperature of the washing water in the mixing section is set to T0 during time t.
When the above equation (4) is integrated under the condition that changes from Tset to Tset, the following equation (5) is obtained. ln {(Tset−Tin) / (T0−Tin)} = − Q · t / V (5) By solving this for Tin, the above equation (1) is obtained.

As described above, the above equation (1) is a relational equation derived based on the law of conservation of heat energy in the mixing section. It is preferable that the time t required for replacement of the washing water is short. On the other hand, the temperature Tin of the washing water has a limit value according to the flow rate Q and the capability of the heating means. If the temperature of the washing water is set based on the above equation (1) in consideration of these circumstances, the washing water in the mixing section can be appropriately replaced.

The above-mentioned temperature compensating mechanism is desirably provided so as to exchange heat with the heating means. In this case, by exchanging heat with the heating means,
The temperature change of the temperature compensation mechanism itself can be suppressed, and the temperature of the washing water can be more appropriately maintained at a constant temperature. Further, the temperature of the temperature compensating mechanism can be brought closer to the designated temperature early by the heat from the heating means.
Further, when the temperature compensating mechanism is constituted by the mixing section, the heat is always transmitted from the heating means to the temperature compensating mechanism, so that the replacement of the washing water immediately after the start of the washing can be avoided.

In the sanitary washing device of the present invention, the temperature compensation mechanism can be configured in various other modes. For example, the temperature compensation mechanism may be a mechanism including a pipe formed so that heat can be exchanged between cleaning water supplied from outside at different times.

In this case, the temperature fluctuation can be compensated by exchanging heat between the cleaning waters.
Various modes are conceivable as such a pipeline. For example,
In a meandering pipeline, a configuration in which adjacent pipelines are in thermal contact with each other can be considered. In this case, the washing water supplied at an earlier time and the washing water supplied at a later time can exchange heat with each other via adjacent pipes, thereby compensating for temperature fluctuation. Further, it is also possible to adopt a configuration in which the pipes are branched into two or more pipes on the way and then joined again, and the lengths of the respective branched pipes are changed. In this case, the cleaning water supplied at different times is merged with each other, so that the temperature fluctuation can be compensated.

Further, the temperature compensation mechanism may be a mechanism formed by a pipe having a turbulence generating mechanism for generating a turbulent flow in the pipe. In this way, the washing water is stirred within a predetermined range by the turbulence generated in the pipeline,
Temperature variations within the region are averaged. Various configurations are possible for the turbulence generation mechanism. For example, a configuration in which a turbulence grid is provided in a pipe, a configuration in which a fence or a vortex generator for generating turbulence is provided are conceivable.

In the sanitary washing device of the present invention, setting means for setting a target temperature of the washing water after heating, detecting means provided downstream of the temperature compensating mechanism for detecting the temperature of the washing water, It is preferable that the apparatus further includes a control unit that controls the heating unit based on the temperature detected by the detection unit and heats the cleaning water to the target temperature. With this configuration, the heating unit can be controlled based on the temperature whose fluctuation has been compensated by the temperature compensation mechanism, and thus appropriate control of the heating unit is possible.

Further, it is desirable to have an air mixing means for mixing air into the washing water at a predetermined ratio. In the case of using cleaning water mixed with air, it is very difficult to keep the temperature of the cleaning water constant because the flow rate fluctuates due to the fluctuation of the mixing amount of air. ADVANTAGE OF THE INVENTION According to the sanitary washing | cleaning apparatus of this invention, the fluctuation | variation of temperature can be compensated by the comparatively simple structure also with the washing water which mixed the air. Therefore, the present invention is particularly useful in a sanitary washing apparatus using washing water mixed with air.

In this case, it is preferable that the air mixing means is provided downstream of the temperature compensation mechanism and the heating means. In this way, the cleaning water can be heated without being affected by the amount of air mixed in.
It is easy to keep the washing water at a certain temperature. Further, the time from mixing the air to ejecting the air can be reduced. In general, when the time after air mixing is long, the size of the bubbles becomes uneven due to the coalescence of the bubbles, so that the washing feeling is likely to be impaired. If the air mixing means is provided in the above aspect, it is possible to avoid a decrease in the washing feeling due to the coalescence of the bubbles.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (1) Apparatus configuration: Next, an embodiment of the present invention will be described based on examples. FIG. 1 is a block diagram showing a schematic internal configuration of a sanitary washing device 10 as an embodiment of the present invention. The sanitary washing device 10 is attached to the toilet body 14 and is a device that blows out water supplied from a general water pipe to a local part of a human body to wash the local part of the human body.

The sanitary washing device 10 is assembled in a casing 16 fixed to the toilet body 14. The water absorption pipe 12 is formed so as to be connectable to a water pipe, and functions as a supply path of cleaning water from the water pipe to the sanitary washing device 10. The sanitary washing device 10 is connected by a pipe in the order of the pump 20, the suction head 30, the heat exchanger 40, the temperature compensator 110, the flow control valve 50, and the nozzle 70 from the water absorption pipe 12 side. The washing water supplied from the water absorption pipe 12 passes through each component of the sanitary washing device 10 in this order, and is then ejected from the nozzle 70. The components can be arranged in various orders from upstream in addition to the order described above.

The pump 20 adjusts the washing water supplied from the water suction pipe 12 to a pressure suitable for washing. The pump 20 adjusts the flow rate of the cleaning water by adjusting the pressure of the cleaning water. When the pump 20 is turned on, the cleaning water is ejected from the nozzle 70. The pressure of the washing water can be adjusted by the user as described later.

The suction head 30 is a part that has a function of mixing air bubbles into the cleaning water. In this embodiment, bubbles can be mixed into the cleaning water at a predetermined ratio by sending air pressurized by the air pump 32 connected to the suction head 30. The principle of mixing bubbles will be described with reference to FIG. FIG. 2 is an enlarged view of a cross section of the suction head 30. The washing water flows from the left side to the right side in the figure. The suction head 30 has a configuration in which an air chamber 35 is provided inside a housing 34 and a cylindrical bubble dispersion member 36 is fixed. The flow path diameter through which the washing water flows is about 1.5 to 3.0 mm
It is. The housing 34 is provided with an air introduction pipe 37 for sending air pressurized by the air pump 32 into the air chamber 35.

The cell dispersion 36 is formed of a porous material having a large number of openings. The pore formed in the porous body does not leak water to the outside at the pressure of the washing water passing through the inside,
It is a fine hole that allows air to be sent from the outside to the inside due to the pressure difference between the inside and the outside.

The cell dispersion 36 is formed by heating and molding substantially spherical particles of ultrahigh molecular weight polyethylene. When these substantially spherical particles are molded by heating, independent pores in which voids are divided by the particles can be formed on the surface of the cell dispersion 36. In order to fill the particles with substantially uniform particles, the openings are arranged in a substantially regular grid. The regularly arranged openings have an advantage that generated bubbles can be prevented from uniting with each other. Since the particles are fused by heat molding, there is also an advantage that they are excellent in strength against water pressure and air pressure.

Ultrahigh molecular weight polyethylene has the advantage that the surface properties can be easily controlled during molding by sufficiently controlling the heating temperature and melting at a temperature slightly above the melting point of the resin. In addition, there is an advantage that it has physical properties suitable for being applied to a part of the flow path of the washing water, such as being chemically stable and having almost no water absorption.

Although the average particle diameter of the particles is 50 μm to 300 μm, the pore diameter can be controlled by controlling the particle diameter of the material, so that the bubble diameter of generated bubbles is determined by the average particle diameter of the material. When the particles having an average particle diameter of 50 μm to 300 μm are used, pores for forming a bubble diameter of 100 μm to 1000 μm are formed. To increase the cell diameter, the particle diameter of the material may be increased, and to decrease the cell diameter, the particle diameter of the material may be decreased.

The cell dispersion 36 can be formed of various other materials. For example, a material obtained by weaving substantially spherical particles of an acrylic resin or a fiber material such as nylon into a substantially lattice shape may be used. Further, metals such as bronze and stainless steel, glass, and the like can also be used. Instead of using the heat-meltable powder, a material having continuous pores formed using phase change glass, a ceramic material, or the like may be used.

When the air pressurized by the air pump 32 is sent from the air introducing pipe 37 to the air chamber 35, the air is sent from the opening of the bubble dispersing element 36 into the pipe, and expands at each opening. . When the air expands to a predetermined size, the air is cut off by the shearing force received from the washing water flowing in the pipe and becomes bubbles, which are mixed into the washing water. In the present embodiment, the diameter of the independent aperture of the cell dispersion 36 is set so that the diameter of the formed cells is about 100 to 1000 μm. The air pump 32
About 50,000 to 100,000 Pa (about 0.5 to 1.0 k
Any type can be used as long as it can perform steady operation with a pumping capacity of about gf / cm ² ), and various types such as a rolling pump, a vane pump, a rotary pump, and a linear pump can be employed.

The heat exchanger 40 is a so-called instantaneous water heater. The cleaning water is directly heated by the heater 42 and supplied to the nozzle 70. In this embodiment, a ceramic heater is used as the heater 42. The heat exchanger 40 is
It has the ability to heat the wash water to about 40 degrees Celsius depending on the settings of the user.

FIG. 3 is an explanatory diagram showing the internal structure of the heat exchanger 40. The left side of FIG. 3 is a cross-sectional view from the side of the heat exchanger 40, and the right side of FIG. 3 is a cross-sectional view from the front. The heat exchanger 40 is formed such that a heater 42 is supported by a plurality of separators 46 inside a housing 44. The cleaning water flows on both sides of the heater 42 as shown on the left side of FIG. The separators 46 are arranged in a staggered manner as shown on the right side of FIG. The washing water is branched by the separator 46, and flows while being stirred. The separator 46 improves the heat transfer efficiency from the heater 42 to the cleaning water by such an effect.

The structure of the nozzle 70 will be described. FIG. 4 is a sectional view showing the internal structure of the nozzle 70. Inside the nozzle 70, two cleaning water flow paths having a circular cross section are formed.
The small-diameter flow path is the hip-washing water channel 72 that serves as the flow path of the washing water for the hip-wash. The large-diameter flow path is a bidet cleaning water passage 74 that serves as a flow path of cleaning water for bidet cleaning. In this embodiment,
The diameter of the butt washing channel 72 is about 1.9 mm, and the bidet washing channel 7
4 had a diameter of about 2.5 mm. Also, both flow paths are about 95m
At about m, the pressure loss in the buttocks washing channel 72 and the pressure loss in the bidet washing channel 74 are set to be substantially equal. Since the buttocks washing channel 72 has a smaller diameter and a larger pressure loss per unit length, the bidet washing channel 74
Has a slightly shorter flow path length. The tip of the nozzle 70 is provided with a tail washing water jet 73 connected to a tail washing water channel 72 and a bidet washing water jet 75 connected to a bidet washing water channel 74. Butt washing water spout 73
Has one spout. The bidet cleaning water spout 75 has two large and small spouts, and the washing water is spouted from both spouts simultaneously.

In the present embodiment, the diameters of the buttocks washing channel 72 and the bidet washing channel 74 are changed in order to obtain different washing feelings. In this embodiment, the diameter of the buttocks washing channel 72 is smaller than the diameter of the bidet washing channel 74. Therefore, the flow rate of the washing water in the buttocks washing channel 72 is faster than the flow rate of the washing water in the bidet washing channel 74. The time from when air bubbles are mixed into the washing water to when it is ejected is shorter in the butt washing than in the bidet washing. In general, the diameter of bubbles is known to increase in correlation with the elapsed time after mixing, so in the present embodiment, the washing water used for ass washing is more than the washing water used for bidet washing. The diameter of the bubbles becomes smaller. The smaller the bubble diameter, the harder the washing feeling. As described above, due to the difference in the bubble diameter and the ejection speed, the washing feeling between the buttocks washing and the bidet washing is different, and in this embodiment, the buttocks washing gives a harder washing feeling than the bidet washing. Can be.

At the base of the nozzle 70, a switching mechanism for switching the supply destination of the washing water to the buttocks washing channel 72 and the bidet washing channel 74 is provided. In addition, the nozzle 70
Is provided with a nozzle drive motor 60 for driving the nozzle forward and backward. The nozzle drive motor 60 causes the nozzle 70 to advance from the standby position of the casing 16 to the buttocks cleaning position or the bidet cleaning position further in front thereof, or to retract from both cleaning positions to the standby position. The state of each movement is shown by a broken line in FIG.

The switching mechanism switches the supply destination of the washing water in conjunction with the movement of the nozzle 70. FIG. 5 is an explanatory diagram showing a mechanism for switching the supply destination of the cleaning water and its function. As shown in the drawing, the switching mechanism includes a nozzle body 71.
Support 76 slidably supported by a spring 78 via a spring 78
And a shielding block 79 fixed to the casing 16. In the support 76, a flow path 77 through which the washing water that has passed through the heat exchanger 40 flows is formed. Nozzle 70
Is in the standby position (the position indicated by the broken line in FIG. 5A), the shielding block 79 and the support 76 do not interfere with each other. Even when the nozzle 70 moves from left to right in FIG. 5A and comes to the buttocks washing position, the shielding block 79 and the support 76 do not interfere with each other. In these states, the support 76 is located above by receiving the urging force of the spring 78, and the flow path 77 of the support 76 and the buttocks washing water channel 72 face each other. Therefore, the washing water passes through the buttocks washing water channel 72 in the nozzle 70,
It is spouted from the ass washing water spout 73.

As the nozzle 70 advances to the bidet cleaning position, the support 76 contacts the shielding block 79. As a result, as shown in FIG. 5B, the support 76 is pushed down by the shielding block 79, and the flow path 77 of the support 76 is
And the bidet washing water channel 74 face each other. Therefore, the washing water passes through the bidet washing water channel 74 in the nozzle 70 and is jetted from the bidet washing water jet port 75. When the nozzle 70 returns from the bidet cleaning position to the standby position, the support 76 returns to the upper initial position by the urging force of the spring 78.

The above operations are performed by the control device 1 shown in FIG.
00. The control device 100 has a C
The microcomputer is provided with a PU, a RAM, and a ROM, and controls the operation of each component of the sanitary washing device 10 according to various control programs stored in the ROM. Various sensors are connected to the control device 100 in order to perform this control. For example, a seating sensor 102 for detecting that the user is seated, a temperature sensor 106 for detecting the temperature of the washing water, a remote controller 200
And a light receiving unit 104 for inputting an infrared signal from the camera. The seating sensor 102 of the present embodiment detects the capacitance of a heater provided for heating the toilet seat, and detects seating based on a change between when the seat is seated and when it is not seated. In addition, various sensors can be applied as the seating sensor 102, such as a sensor that detects the pressure acting between the toilet body 14 and the toilet seat at the time of sitting.

The remote controller 200 is a device that converts a user's intention into an infrared signal and outputs the infrared signal. FIG. 6 shows an outline of the remote controller 200. As shown in the figure, the remote controller 200 is provided with a group of buttons for commanding an operation, an operation unit for setting an operation, and an operation on / off button 202 for turning on / off the entire sanitary washing device. ing. Buttons for instructing the operation include a bottom cleaning button 206 for starting local cleaning, a bidet cleaning button 208, a drying button 210 for starting blowing hot air, and a stop button 20.
4. A massage setting button 212 for setting a jet of washing water with a strong or weak change in water force during ass washing, and a massage setting button 214 for setting a jet of washing water with a strong or weak change in water force during bidet washing. There is a move setting button 216 for setting the cleaning of the local area where the nozzle 70 is swung. The operation unit for setting the operation includes water discharge temperature setting buttons 224H and 224L for adjusting the temperature of the washing water, water pressure setting buttons 226H and 226L for setting the strength of the water, and a nozzle for adjusting the position of the nozzle 70 in the front-rear direction. Position adjustment buttons 228F, 228B, deodorization button 218 for setting the deodorization state, toilet seat temperature adjustment knob 22 for setting the toilet seat temperature
0, indoor heating button 2 to set on / off of indoor heating
There are 22. The operation results and setting results of these buttons are
It is displayed on the display unit 230 by a lamp or liquid crystal.

The state of control by the control device 100 will be described by taking a normal cleaning sequence as an example. FIG. 7 is a time chart showing a sequence when the buttocks cleaning is performed. When the seating sensor detects that the user is seated on the toilet seat (time t1), the control device 100 starts the air pump 32 to perform the residual water treatment. By sending air into the nozzle 70, the cleaning water remaining in the nozzle 70 is expelled. At this point, the nozzle 70 is stored in the casing 16.

When the user operates the bottom cleaning button 206 of the remote controller 200 (time t2), the control device 100 detects this signal by the light receiving section 104 and starts pre-cleaning. In other words, the pump 20 and the air pump 32 are driven to eject the cleaning water from the nozzle 70 at a predetermined pressure. The pre-cleaning is a process for cleaning dirt, germs, and the like attached to the inside and the tip of the nozzle 70. At this point, the nozzle 70 is still stored in the casing 16. When the pre-cleaning for a predetermined time is completed (time t3),
Control device 100 temporarily stops driving of pump 20 and air pump 32. Then, the nozzle drive motor 60 is controlled to move the nozzle 70 to a predetermined butt washing position. During this time, the flow control valve 50 is once returned to the origin, and the water pressure setting button 226H of the remote controller 200,
The opening is set according to the water force set at 226L.

When the nozzle 70 comes to the bottom cleaning position (time t4), the control device 100 drives the pump 20 and the air pump 32 to perform the main cleaning. Wash water mixed with air bubbles at a predetermined ratio is spouted from the ass washing water jet 73 of the nozzle 70 to clean the buttocks. During this time, the control device 100
The current of the heater 42 is controlled according to parameters such as the flow rate of the cleaning water so that the temperature of the cleaning water is maintained at the temperature set by the user. When the user operates the move setting button 216, the control device 100 responds accordingly.
By controlling 0, the nozzle is swung. When the user operates the stop button 204 to instruct the end of cleaning (time t)
5), the control device 100 includes the pump 20 and the air pump 3
2 is stopped. Thereafter, the nozzle driving motor 60 is controlled to move the nozzle 70 to the standby position. During this time, the flow control valve 50 is once returned to the origin, and then set to the fully open position again.

When the nozzle 70 returns to the standby position in the casing 16 (time t6), the control device 100 starts post-washing. By driving the pump 20 and the air pump 32, the washing water mixed with the air bubbles at a predetermined ratio is jetted from the nozzle 70. The post-cleaning is cleaning for removing dirt attached to the nozzle 70 by the main cleaning. After a lapse of a predetermined time, the control device 100 sets the pump 20 and the air pump 32
Is stopped to finish the post-washing. Thereafter, when the seating sensor 102 detects that the user has left the toilet seat (time t7), the control device 100 causes the air pump 32
To drive air into the nozzle 70. Thus, the washing water remaining in the nozzle 70 is discharged. The purpose of discharging the washing water is to prevent germs from multiplying and the apparatus from corroding. In addition, the cell dispersion 36
This is also to prevent the washing water from entering the inside of the independent opening. In some cases, after the main cleaning, an operation of blowing out hot air to dry a local part may be included according to a user's instruction.

(2) Configuration of Temperature Compensator Next, the configuration of the temperature compensator 110, which is the most characteristic part of the sanitary washing device of this embodiment, will be described in detail.
FIG. 8 is an explanatory diagram illustrating the configuration of the temperature compensator 110 according to the present embodiment. FIG. 8A is a plan view of the temperature compensator 110. FIG. The temperature compensator 110 is configured as a rectangular parallelepiped tank capable of storing a small amount of washing water. In the temperature compensator 110 of the present embodiment, the outside is covered with a heat insulating material in order to guarantee the heat insulation inside and outside. It may be composed of an inner container and an outer container sandwiching a vacuum portion.

As shown in the figure, the temperature compensator 110 has an inflow port 112 into which cleaning water flows and an outflow port 114 outflow, for diagonal cleaning of the upper surface. As shown in FIG. 1, the inlet 112 is connected to the heat exchanger 40 by a pipe, and the outlet 11
4 is connected to the flow control valve 50. FIG. 8B is a sectional view of the inlet 112 of the temperature compensator 110.
As shown, the inlet 112 protrudes slightly inside. The inner corner is formed with a slight curvature.

When the washing water flows into the temperature compensator 110 from the inlet 112, as shown by arrows in FIGS. 8A and 8B, a vortex is generated, and the washing water stored in the inside is removed. Mixed. As a result, the temperature fluctuation of the washing water flowing from the inflow port 112 is suppressed. Therefore, the washing water kept at a substantially uniform temperature flows out of the outlet 114.

The reason why the temperature fluctuation of the washing water is suppressed by the above mixing will be described with reference to mathematical expressions. Temperature compensator 110
Is V (liter), and the flow rate of the washing water flowing from the inlet 112 is Q (liter / sec). Let T be the temperature of the wash water in the temperature compensator 110 and Tin be the temperature of the wash water flowing in, and let ΔT denote the temperature fluctuation of the wash water in the temperature compensator 110 caused by the flow of the wash water at that temperature.
And Based on the balance of the heat energy in the temperature compensator 110 at the time Δt (sec),
The relationship represented by equation (4) described above is established. (4)
By modifying the equation, the following equation (6) is obtained. ΔT = (Q · Δt / V) · (Tin−T) (6)

(Tin-T) in the right side of the above equation (6) is
This is a value representing the temperature fluctuation of the inflowing cleaning water with reference to the temperature in the temperature compensator 110. (Q · Δt / V) is a ratio of the volume of the cleaning water flowing into the volume of the cleaning water stored in the temperature compensator 110. When Δt is a sufficiently small value, (Q · Δt / V) <1. Accordingly, the left side of the above equation (6), that is, the temperature fluctuation occurring in the temperature compensator 110 has a smaller value than the temperature fluctuation of the cleaning water.

The washing water thus flowing into the temperature compensator 1
If sufficiently mixed with the washing water stored in the inside 10, the temperature fluctuation of the washing water can be suppressed. The temperature compensator 110 of the present embodiment promotes the above mixing by devising the positions of the inlet 112 and the outlet 114, the internal shape of the inlet 112, and the internal shape of the temperature compensator 110. of course,
The shape of the temperature compensator 110 is not limited to that shown in FIG. 8 as long as the shape is such that the mixing is sufficient to suppress the temperature fluctuation of the washing water.

The temperature compensator 110 may be provided with a bell trap 116 as shown in FIG. 9 at the inlet 112 to further promote mixing. In addition, a turbulent grid may be provided at the outlet of the inflow port 112, a fence for generating Karman vortices may be provided, or a so-called vortex generator may be provided.

The volume of the temperature compensator 110 can be set experimentally or analytically so as to sufficiently suppress the temperature fluctuation in consideration of the flow rate of the washing water and the width of the temperature fluctuation.
In this embodiment, a tank having a small capacity of about 5 milliliters is used.

Next, a description will be given of how the temperature of the washing water changes in accordance with the washing sequence by the sanitary line device 10 (see FIG. 7). FIG. 10 is a graph showing a change in the temperature of the washing water flowing out of the temperature compensator 110. The vertical axis indicates "T
/ Tin ”, and the horizontal axis represents the dimensionless quantity of“ Q · t / V ”. T is the temperature of the wash water flowing out of the temperature compensator 110, and Tin is the temperature of the wash water flowing into the temperature compensator 110. Q is the flow rate of cleaning water, t is time, and V is the volume of the temperature compensator 110.

Until the cleaning is started, the heater 42 is not energized. Further, the temperature compensator 110 itself is not kept warm. Therefore, as an initial state, the temperature compensator 11
The washing water temperature within 0 is a normal water temperature according to the outside air temperature. FIG. 10 shows a case where the water temperature in the temperature compensator 110 is 0 (° C.) as an example.

When the cleaning switch is operated, heated hot water flows into the temperature compensator 110. As a result, the temperature in the temperature compensator 110 gradually increases as shown in FIG. The state of the temperature change at this time can be obtained from the above equation (5). As shown in FIG. 10, the amount (Q · t) of the inflowing washing water is about 4 times the volume V of the temperature compensator 110.
At this point, the temperature T in the temperature compensator 110 reaches about 98% of the temperature Tin of the washing water flowing in. After reaching this temperature, the temperature change in the temperature compensator 110 becomes very gentle, as shown in FIG. Therefore,
The function of compensating for the fluctuation of the temperature Tin flowing in the washing water can be achieved. In addition, the temperature of the washing water is about 35 ° C to 4 ° C.
When the temperature is specified in the range of about 0 ° C., the temperature error of the washing water when the temperature reaches 98% thereof is only about 1 ° C., so that the user does not feel uncomfortable.

In the sanitary washing device 10 of this embodiment, the temperature in the temperature compensator 110 is sufficiently raised by the washing water used in the pre-washing (time t2 to t3 in FIG. 7) in the washing sequence. Then, the main cleaning (from time t4 in FIG. 7)
At t5), the cleaning water at the temperature specified by the user is jetted. However, as is clear from FIG. 10, when the cleaning water having the temperature specified by the user is used, the temperature compensator 110 is used.
In order to achieve a sufficient function, a volume of washing water equivalent to four times the volume of the temperature compensator 110 is required. In the case of the present embodiment, since the volume of the temperature compensator 110 is 5 ml, about 20 ml of washing water is used for pre-washing.

FIG. 11 specifically shows this state. The case where the temperature of the washing water is set to 40 ° C. is exemplified. 98% of the set temperature is about 39 ° C. When the washing water at 40 ° C. flows in, a change in the temperature of the washing water flowing out is shown by a curve C1 in FIG. In order to raise the temperature to 39 ° C., a volume of about 20 milliliters of washing water is required, as described above. If the flow rate of the washing water is 8 ml / sec, it takes about 2.5 seconds to raise the temperature to 39 ° C.

On the other hand, if washing water at a high temperature flows in regardless of the set temperature, the temperature of the washing water flowing out rises quickly. For example, when the washing water at 50 ° C. flows in, the temperature of the washing water flowing out changes as shown by a curve C2 in FIG. The time required for raising the temperature in the temperature compensator 110 to 39 ° C. is about 1.1 seconds.

When the washing water of 40 degrees was introduced,
FIG. 12 shows the relationship between the temperature of the washing water flowing out and the total amount of waste heat consumed in both cases where the washing water at 0 degree is introduced. Here, the heat amount of the heater 42 is set to 1.4.
kW. The curve C3 corresponds to the case where the washing water of 40 degrees flows, and the curve C4 corresponds to the case where the washing water of 50 degrees flows. As shown in the figure, the amount of heat consumed until the temperature of the wash water flowing out reaches 39 ° C. is 1450 J for the former and 490 J for the latter. As is clear from FIGS. 11 and 12, in the section until the temperature compensator 110 functions, the cleaning water having a temperature higher than the designated temperature is used in view of the required time, the amount of cleaning water, and the amount of heat consumed. It can be said that it is more preferable.

In the present embodiment, the temperature of the washing water is controlled from such a viewpoint. The temperature control processing of the washing water in the present embodiment will be described based on the flowchart of FIG. This processing is performed by the control device 10 after the cleaning switch is operated.
This process is repeatedly executed by the CPU 0 together with other control processes.

When this process is started, the CPU first inputs the washing water temperature Tset designated by the user (step S10). The cleaning water temperature Tset can be input by receiving a signal from the remote controller 200 through the light receiving unit 104. Further, the CPU detects the temperature of the washing water flowing out (step S20). This temperature can be detected by a temperature sensor 106 provided downstream of the temperature compensator 110.

Next, the CPU determines whether or not pre-cleaning is being performed (step S30). The CPU controls the pump 20, the heater 42, the nozzle drive motor 60, and the like in the process prepared for the pre-cleaning until a predetermined period elapses from the operation of the cleaning switch. Therefore, whether or not the pre-cleaning is being performed can be easily determined.

When the pre-cleaning is not being performed, the target temperature for heating by the heater 42 is set by ordinary feedback control. In the present embodiment, the setting is performed by so-called proportional control (step S40). That is, the target temperature Tin for heating is set by multiplying the deviation between the designated temperature Tset and the current temperature T0 by a predetermined gain. Since the setting of the target value by the proportional control is a known technique, a detailed description is omitted.

If the pre-cleaning is being performed, the target heating temperature Tin is set based on the above-described equation (1) (step S50). Formula (1) is the current temperature T0 of the washing water.
(° C.), the flow rate Q (liter / sec) of the cleaning water, the target time t (sec) required for replacement, and the temperature Tin of the cleaning water flowing in according to the volume V (liter) of the mixing section. By substituting the time required for the pre-cleaning as the target time t, and substituting each of the above amounts, the target temperature Tin of the cleaning water can be set. If the cleaning water having such a temperature is supplied, the temperature of the temperature compensator 110 can be sufficiently increased during the pre-cleaning.

The CPU proceeds to step S40 or S5
The heater 42 is energized based on the target heating temperature Tin set at 0 (step S60). Thus, the cleaning water temperature control routine ends. In the flowchart of FIG. 13, the heating target temperature Tin during the pre-cleaning changes as the temperature T0 of the outflowing clean water changes. On the other hand, during the pre-cleaning, after the heating target temperature Tin is set once, the process of step S50 may be skipped. Further, in order to prevent the temperature in the temperature compensator 110 from excessively rising, if the temperature T0 of the outflowing cleaning water exceeds the specified temperature Tset, the process of step S40 is performed even during pre-cleaning. May be used to set the target heating temperature Tin.

The sanitary washing device 1 of the present embodiment described above.
According to 0, by providing the temperature compensator 110, the temperature of the washing water jetted from the nozzle 70 can be maintained substantially constant. Therefore, local cleaning can be performed comfortably. In addition, the sanitary washing device 10 of the present embodiment uses a so-called instantaneous heat exchanger 40 and can keep the temperature of the washing water constant. That is, a large capacity tank is not required unlike a hot water storage type heat exchanger. Therefore,
The entire device can be reduced in size. Further, unlike the case where a hot water storage type heat exchanger is used, the temperature of the washing water can be kept constant regardless of the amount of jetting of the washing water.

The sanitary washing device 10 of this embodiment uses washing water containing air bubbles. The use of the cleaning water mixed with air bubbles can enhance the cleaning power and also achieve a water saving effect. Sanitary washing device 1 of the present embodiment
According to 0, the temperature of the washing water can be kept constant without impairing these effects due to the washing water containing air bubbles. Generally, it is very difficult to keep the temperature of the washing water containing air bubbles constant. This embodiment is significant in that the temperature of the washing water is maintained with a simple configuration such as the temperature compensator 110.

The temperature compensator 110 of this embodiment can take various forms other than those shown in FIGS. FIG. 14 shows a schematic configuration of a temperature compensator 110a as a first modification. As shown in the figure, a temperature compensator 110a as a first modification is integrally formed with a heat exchanger 40a via a partition 118. The cleaning water flows as indicated by the arrow in the figure and is heated by the heater 42a. afterwards,
The cleaning water flows in from the inlet 112a of the temperature compensator 110a. Then, it is mixed with the washing water stored in the temperature compensator 110a and flows out from the outlet 114a. The partition wall 118 supplies the washing water flowing through the heat exchanger 40 to the inlet 112a.
To promote mixing in the temperature compensator 110a.

The temperature compensator 110a having such an embodiment
Is in a state of being thermally coupled to the heat exchanger 40a. Therefore, it is possible to prevent the temperature of the washing water in the temperature compensator 110a from being lowered by the heat radiation. As a result, the temperature of the washing water can be easily maintained at the specified temperature. Also, the heater 42
If the power is always supplied to a, the temperature of the washing water in the temperature compensator 110a can be maintained near the designated temperature. By doing so, it is not necessary to wait for the temperature in the temperature compensator 110a to rise sufficiently before the main cleaning, and the cleaning can be performed quickly.

FIG. 15 shows a schematic configuration of a temperature compensator 110b as a second modification. The temperature compensator 110b as a second modified example is constituted by a meandering pipe as shown in the figure. A partition wa having a high heat transfer coefficient is provided between adjacent pipes.
1, wa2 and the like. The washing water is supplied to the inlet 11
2b and out of the outlet 114b.

According to the temperature compensator 110b having such an embodiment, heat can be exchanged between the cleaning waters via the partition walls wa1, wa2, etc., and the temperature of the cleaning water can be kept uniform. FIG. 15 schematically shows a state in which cleaning water having a temperature fluctuation flows. The hatched ellipse in the figure indicates a portion where the temperature is relatively high. Attention is paid to the portion Wh where the temperature is relatively high. When the temperature of the washing water flowing in the adjacent pipes across the partition walls wa1 and wa2 is relatively low, heat is transmitted from the portion Wh to the washing water in the adjacent pipes as indicated by the arrow in FIG. You. As a result, the temperature of the portion Wh decreases, and the temperature of the washing water in the adjacent pipeline increases. By performing such heat exchange throughout the pipe provided in the temperature compensator 110b,
The temperature of the washing water flowing out from the outlet 114b is maintained at a substantially constant temperature.

In the temperature compensator 110b, the length of the meandering pipes PA1 to PA6 is set based on the fluctuation cycle of the temperature of the washing water so that the heat exchange is performed appropriately. Assuming that the average interval of a portion where the temperature is relatively high (the ellipse shown by hatching in FIG. 15) is a, the interval L at which the pipeline meanders is “a / 2 × (2n−1)” (n is (Natural number). Further, when the interval between the parts having relatively high temperatures fluctuates greatly, the meandering interval may be set to a different value for each of the portions PA1 to PA6.

FIG. 16 shows a schematic configuration of a temperature compensator 110c as a third modification. A temperature compensator 110c as a third modification includes pipelines P1 to P
3 is comprised. The length of each conduit is different. The washing water flows in from the inflow port 112c, branches and flows through each of the pipes Pa to P3, and then merges into the outflow port 114c.
Flow out of c.

According to the temperature compensator 110c having such an embodiment, after passing through the pipes P1 to P3 having different lengths, the portions having different temperatures in the washing water join to exchange heat between the washing waters. In addition, the temperature of the washing water can be kept uniform. FIG. 16 schematically shows a state in which cleaning water having a temperature fluctuation flows. The hatched elliptical portions in the figure indicate portions where the temperature is relatively high. Pipe P
2, P3 is longer than the conduit P1. Therefore, when the high temperature portion Wh2 flowing through the pipe P1 reaches the outlet 114c, the high temperature portions Wh3 and Wh flowing through the pipes P2 and P3 are used.
4 has not yet reached the outlet 114c. As a result, the high-temperature portion Wh2 is mixed with the low-temperature portion located immediately before the high-temperature portions Wh3 and Wh4 and flows out from the outlet 114c. on the other hand,
The high temperature parts Wh3 and Wh4 flow out of the outlet 114c mixed with the low temperature part immediately after the high temperature part Wh2. Based on such an operation, the temperature compensator 110c according to the third aspect can keep the temperature of the outflowing washing water substantially constant.

In the temperature compensator 110c, the pipes P2 and P2 are set so that temperature compensation based on the above-described principle is appropriately performed.
Set the length of P3. The part where the temperature is relatively high (FIG. 16)
Assuming that the average interval of the ellipses shown by hatching in the figure is a, the difference between the lengths of the pipes P2 and P3 and the pipe P1 is “a
/ 2 × (2n-1) "(n is a natural number) may be set to the lengths of the pipelines P2 and P3. In addition, when the interval between the portions having relatively high temperatures fluctuates greatly, it is desirable to further increase the number of conduits having various lengths. In the case where the temperature fluctuation appears at a substantially constant cycle, the pipeline P
3 may be omitted.

The temperature compensator can have various configurations other than the above. For example, instead of using one individually formed tank as in the temperature compensator 110 of the present embodiment, as shown in FIG. May be fulfilled. Further, as shown in FIG. 17, a so-called turbulent grid may be provided in the pipeline. In this case, a vortex is generated in the pipe and the washing water is stirred, so that local temperature fluctuations are averaged.
FIG. 17 shows a case where the turbulence grid is provided after the diameter of the pipe is partially increased, but the turbulence grid may be provided while the diameter of the pipe is kept constant. In addition, any other than the turbulent grid may be provided as long as it has the effect of stirring the washing water. For example, a fence for generating a Karman vortex may be provided, or a so-called vortex generator may be provided.

Although various embodiments of the present invention have been described above, the present invention can be embodied in various other forms without departing from the gist of the present invention. For example, in the above-described embodiment, an example in which the present invention is applied to a toilet bowl has been described. In addition, it can be used for various washing machines such as a shower and a hand washing machine. Further, in this embodiment, a sanitary washing apparatus using washing water mixed with air bubbles has been described as an example, but it is needless to say that the present invention can also be used in a sanitary washing apparatus in which air bubbles are not mixed in washing water. In the present embodiment, the washing water stored in the temperature compensator 110 is jetted in the pre-washing. However, a pipe is provided to return to the upstream of the heater 40 without jetting the washing water to save water. Is also good.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a sanitary washing device 10.

FIG. 2 is an explanatory diagram showing a schematic configuration of a suction unit 30.

FIG. 3 is an explanatory diagram showing a schematic configuration of a heat exchanger 40.

FIG. 4 is an explanatory diagram showing a schematic configuration of a nozzle 70.

FIG. 5 is an explanatory diagram showing a state of switching a flow path of a nozzle 70.

FIG. 6 is an explanatory diagram showing a schematic configuration of a remote controller 200.

FIG. 7 is a time chart showing a cleaning sequence of the sanitary cleaning device 10.

FIG. 8 is an explanatory diagram showing a schematic configuration of a temperature compensator 110.

FIG. 9 is an explanatory diagram showing a modification of the temperature compensator 110.

FIG. 10 is a graph showing a relationship between an inflow amount of washing water and a change in temperature of washing water flowing out.

FIG. 11 is a graph showing the relationship between the inflow time and temperature of cleaning water and the change in the temperature of cleaning water flowing out.

FIG. 12 is a graph showing the relationship between the temperature of cleaning water and the total amount of waste heat.

FIG. 13 is a flowchart of a cleaning water temperature control routine.

FIG. 14 is an explanatory diagram showing a schematic configuration of a temperature compensator 110a according to the first embodiment.

FIG. 15 is an explanatory diagram illustrating a schematic configuration of a temperature compensator 110b according to a second embodiment.

FIG. 16 is an explanatory diagram showing a schematic configuration of a temperature compensator 110c according to a third embodiment.

FIG. 17 is an explanatory diagram showing a schematic configuration of a temperature compensator of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Sanitary washing | cleaning apparatus 12 ... Water absorption pipe 14 ... Toilet bowl main body 16 ... Casing 20 ... Pump 30 ... Suction head 32 ... Air pump 34 ... Housing | casing 35 ... Air chamber 36 ... Bubble dispersion 37 ... Air introduction pipe 40, 40a ... Heat Exchangers 42, 42a Heater 44 Casing 46 Separator 50 Flow control valve 60 Nozzle drive motor 70 Nozzle 71 Nozzle body 72 Buttocks washing water channel 73 ... Buttocks washing water spout 74 ... Bidet washing water channel 75 ··· bidet washing water spout ······························································································································· Turbulent grids 112, 112a, 112b, 112c ... Inlets 114, 114a, 114b, 114c ... Outlets 16: Bell trap 118: Partition wall 200: Remote controller 202: Operation on / off button 204: Stop button 206: Butt cleaning button 208 ... Bidet cleaning button 210 ... Drying button 212 ... Massage setting button 214 ... Massage setting button 216 ... Move setting button 218 ... Deodorization button 220 ... Toilet seat temperature adjustment knob 222 ... Indoor heating button 224H, 224L ... Water discharge temperature setting button 226H, 226L ... Water pressure setting button 228F, 228B ... Nozzle position adjustment button 230 ... Display

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinsuke Matsuo 2-1-1 Nakajima, Kokurakita-ku, Kitakyushu-shi, Fukuoka F-term (reference) 2D038 JB04 JH03

Claims (13)

[Claims] 1. A sanitary washing device for washing a human body part by jetting washing water supplied from the outside from a jet port, wherein the washing water supplied from the outside is jetted from the jet port in a path. A sanitary washing apparatus comprising, in series, a heating means for heating the washing water while passing the washing water, and a temperature compensation mechanism for compensating for a change in the temperature of the washing water by exchanging heat between the washing waters. . 2. The sanitary washing device according to claim 1, wherein the temperature compensation mechanism is provided downstream of the heating unit. 3. The sanitary washing device according to claim 1, wherein the temperature compensation mechanism is provided near the heating unit. 4. The temperature compensating mechanism is a mixing section capable of storing a predetermined volume of cleaning water, and mixing and discharging the inflowing cleaning water and the stored cleaning water. On-board sanitary washing equipment. 5. The sanitary washing apparatus according to claim 4, further comprising: replacing washing water stored in the mixing section with washing water having substantially the same temperature as a designated temperature prior to washing of a human body part. A sanitary washing device provided with a replacement means. 6. The sanitary washing device according to claim 5, wherein the replacing means is configured to: when the temperature of the stored washing water is lower than the specified temperature, lower than the specified temperature. The replacement is performed by flowing washing water having a higher temperature into the mixing section, and when the temperature of the stored washing water is higher than the specified temperature, the temperature is higher than the specified temperature. A sanitary washing device, which is means for performing the replacement by flowing low-temperature washing water into the mixing section. 7. The sanitary washing apparatus according to claim 6, wherein the temperature Tin (° C.) is substantially equal to a temperature given by the following equation. Tin = {Tset · exp (Q · t / V) −T0} / {exp (Q · t / V) −1} where Tset is the specified temperature (° C.) T0 is stored washing water Q is the flow rate of washing water (liter / sec) t is the target time required for replacement (sec) V is the volume of the mixing section (liter). 8. The sanitary washing device according to claim 3, wherein the temperature compensation mechanism is provided so as to exchange heat with the heating means. 9. The sanitary washing apparatus according to claim 1, wherein the temperature compensating mechanism is a mechanism including a pipe formed so that heat can be exchanged between washing water supplied from outside at different times. 10. The sanitary washing device according to claim 1, wherein the temperature compensating mechanism is a mechanism formed by a pipe having a turbulence generating mechanism for generating a turbulent flow in the pipe. 11. The sanitary washing apparatus according to claim 1, wherein a setting means for setting a target temperature of the washing water after heating, and a setting means provided downstream of the temperature compensation mechanism to detect a temperature of the washing water. A sanitary washing apparatus comprising: a detecting unit; and a control unit that controls the heating unit based on the temperature detected by the detecting unit to heat the cleaning water to the target temperature. 12. The sanitary washing device according to claim 1, further comprising an air mixing means for mixing air into the cleaning water at a predetermined ratio. 13. The sanitary washing apparatus according to claim 12, wherein said air mixing means is provided downstream of said temperature compensation mechanism and said heating means.