JP3499864B1 - Hot water supply device in shower bathing device - Google Patents

Abstract

A regulator is abolished to reduce costs and prevent pressure loss. A bath tub Y has a bathing space 3 into which a patient K is introduced while being placed on a stretcher or a wheelchair A, and has a shower nozzle 30a for spraying hot and cold water into the bathing space 3 and the like. . After the low-temperature water from the first passage 11 and the high-temperature hot water heated by the boiler 13 from the second passage 12 are combined by the wax thermomixing mixer tap 10, the third passage is formed. 15 and is supplied to the shower nozzle 30a and the like. Regulator 14 for pressure reduction
Is the second path 12 of the first path 11 and the second path 12
Connected only to The pressure of the first passage 11 is set to be 0.5 kg / cm 2 or more higher than the pressure of the second passage 12 after the pressure is reduced by the regulator 14. The flow rate of the hot and cold water discharged from the mixing tap 1 can be changed by adjusting the pressure reduction by the regulator 14 while maintaining the temperature range of, for example, 39 to 41 ° C. at which the temperature becomes appropriate.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot and cold water supply device for a shower bathing apparatus used by a physically handicapped patient when taking a shower bath.

[0002]

2. Description of the Related Art There is a shower bath device as a bath device for a physically handicapped patient. Some of these shower bathing devices allow bathing while the patient is in a wheelchair or a stretcher, as shown in Patent Documents 1 and 2. That is, a patient is introduced together with a wheelchair into an openable bath dome having a plurality of nozzles for injecting hot water into the wheelchair, and the patient on the wheelchair is allowed to bathe by injecting hot water from the nozzle. It is a thing. Therefore, in the shower bath, a bathing space into which a patient in a wheelchair or a stretcher is introduced is defined, and a shower nozzle for injecting hot water toward (the patient introduced into) the bathing space is defined. Usually, a plurality of shower nozzles are provided so that hot water is evenly sprayed to each part of the patient.

In order to obtain hot water having an appropriate temperature, usually, hot water heated by a boiler and low temperature (normal temperature) water are mixed by a mixing tap, and the optimum temperature after mixing is discharged from the mixing tap. The generated hot water is supplied to the shower nozzle. It is also common practice to connect a shower valve (open / close valve) to the hot and cold water supply system passage between the mixing stopper and the shower nozzle in order to inject and stop hot water from the shower nozzle.

A pressure reducing regulator is connected to each of the first system path provided for supplying water to the mixing tap and the second system path for supplying hot water heated by the boiler to the mixing tap. It is generally done. Each regulator is used in a fixed state as it is after the pressures of the first system passage and the second system passage (the pressure of water or hot water flowing inside) are set to predetermined values. It's a reality. That is, the mixing tap is of the wax thermomixing type, and the temperature of the hot water discharged from the mixing tap, that is, the temperature of the hot water supplied to the shower nozzle operates the temperature adjusting operation part provided in the mixing tap. It was done by Then, the discharge pressure of the hot water from the shower nozzle was adjusted by operating a flow rate adjusting valve separately provided in the third system passage connecting the mixing stopper and the shower nozzle (the flow rate adjusting valve was changed to the mixing stopper). Sometimes built-in).

[0005]

[Patent Document 1] Japanese Patent Laid-Open No. 11-47216

[Patent Document 2] Japanese Unexamined Patent Publication No. 9-192194

[Patent Document 3] Japanese Utility Model Laid-Open No. 3-120881

[Patent Document 4] Japanese Utility Model Laid-Open No. 3-125492

[0006]

However, connecting a regulator to both the first system path and the second system path as in the prior art is considerably expensive because the regulator is expensive. The cost will be high. In addition, providing a separate flow rate adjusting valve to adjust the flow rate, that is, the discharge pressure from the shower nozzle according to the patient's request also causes a cost increase.

The present invention has been made in consideration of the above circumstances, and an object thereof is to reduce the number of regulators and additionally provide a dedicated flow rate adjusting valve for adjusting the discharge pressure from the shower nozzle. It is an object of the present invention to provide a hot and cold water supply device for a shower bathing device that does not need to be provided.

[0008]

In order to achieve the above object, the following solution method is adopted in the present invention. That is, as described in claim 1 in the claims, for defining a bathing space to be introduced while a patient is placed on a stretcher or a wheelchair, and for injecting hot and cold water into the bathing space. A bathtub provided with a shower nozzle, a first passage for supplying low-temperature water, a second passage for supplying high-temperature hot water heated by a boiler, and a wax thermomixing type, The mixing nozzle that mixes the water supplied from the first passage and the hot water supplied from the second passage and discharges the mixed hot water, and the hot water discharged from the mixing stopper is the shower nozzle A third system line for supplying to the shower, and a regulator for depressurization is connected only to the second system line of the first system line and the second system line, and the first system line. The line pressure is reduced by the regulator. Than the pressure of the second pathway after being, it is set to be larger 0.5 kg / sq cm or more, are so.

According to the above-mentioned solution method, the flow rate of the hot and cold water discharged from the mixing tap is changed by changing the pressure of the second system passage by the regulator. can do. That is, the temperature of the hot water discharged from the mixing tap is changed within a small change range of 39 ° C to 41 ° C, which is an appropriate temperature, and the flow rate is changed within a large range of 9.5 L / min to 16 L / min. be able to. Further, it is possible to prevent pressure loss in the first path for low temperature water.

A preferred mode based on the above-mentioned solution method is as described in claims 2 and below in the claims. That is, the second system path is configured as a branch system path branched from the first system path, the boiler is connected to the branch system path, and the regulator is provided downstream of the boiler. It is possible to be connected (corresponding to claim 2). In this case, this is preferable in terms of simplifying the system configuration of the first system path and the second system path, including the boiler.

The regulator has an operation portion for changing the degree of pressure reduction by manual operation.
This can be done (corresponding to claim 3). in this case,
According to the patient's request, the caregiver can easily change the flow rate of the hot water discharged from the shower nozzle by manually operating the operation unit of the regulator.
The pressure in the first passage is set to be 0.5 kg / square cm or more higher than the pressure in the second passage after the pressure is reduced by the regulator. This is because the discharge flow rate from the mixing stopper can be largely changed within a range in which the temperature does not largely deviate from the temperature range suitable for shower bathing.
That is, if the discharge flow rate from the mixing tap is changed within a small range, the differential pressure between both system passages may be smaller than 0.5 kg / cm 2 (the pressure in the first system passage is the second). It is necessary to set it so that it is higher than the pressure in the system).

A shower valve connected to the third system passage for stopping the supply of hot water from the mixing tap to the shower nozzle, and a shower valve connected between the mixing tap and the shower valve in the third system passage. First drain valve and the third
A second drain valve connected between the shower valve and the shower nozzle in the system passage; and a temperature sensor for detecting the temperature of hot water between the mixing stopper and the shower valve in the third system passage. And a controller that controls opening and closing of the shower valve and the first drain valve according to the temperature detected by the temperature sensor, the second drain valve including the shower valve and the shower nozzle. Is set so that the valve is automatically opened when the pressure in the third system passage between the above and the third pressure falls below a predetermined pressure, and the controller detects that the temperature detected by the temperature sensor is the first value. Control is performed such that the shower valve is opened and the first drain valve is closed on condition that the temperature is within the predetermined temperature range for a predetermined time. It can be (claim 4 correspondence). In this case, the shower valve is opened on condition that it has been confirmed that the hot and cold water that has passed through the mixing tap is stable and at an appropriate temperature.Therefore, make sure that the hot and cold water from the shower nozzle is not too hot or too cold. It can be surely ejected. In addition, since the hot water in the hot and cold water supply system path from the shower valve to the shower nozzle can be automatically discharged immediately after the shower bath is finished, it is possible to prevent the growth of various bacteria and immediately after the shower valve is opened. It is also preferable in preventing the water hammer phenomenon that tends to occur.

The controller opens the shower valve when the detected temperature detected by the temperature sensor is in a second predetermined temperature range in which the high temperature side and the low temperature side are respectively expanded from the first predetermined temperature range. State and the first
While maintaining the closed state of the drainage valve, when the detected temperature is not within the second predetermined temperature range, the shower valve is closed and the first drainage valve is opened. It is possible (corresponding to claim 5).
In this case, even after the proper temperature is confirmed and the shower valve is once opened, when the temperature of the hot and cold water deviates from the proper temperature, the hot and cold water is discharged again to ensure that the hot and cold water is sprayed from the shower nozzle. Is preferable. Further, since the second predetermined temperature range is expanded on both the higher temperature side and the lower temperature side than the first predetermined temperature degree range,
It is also preferable for preventing hunting in which the shower nozzle repeatedly opens and closes (injects and stops injection).

A plurality of the shower nozzles are provided, and between the shower valve and the plurality of shower nozzles in the third system passage, a waste water tank connected to the shower valve and the plurality of shower nozzles is connected. The second drain valve may be connected to the waste water tank (corresponding to claim 6). In this case, the drainage from the hot and cold water supply system passage can be performed by the single second drainage valve without being tied to the plurality of shower nozzles.

[0015]

According to the present invention, the regulator provided in the first passage can be eliminated, and it is not necessary to separately provide a dedicated flow rate adjusting valve for adjusting the flow rate of the hot water discharged from the shower nozzle. It is possible to reduce various costs. Further, it is possible to prevent pressure loss in the first path for low temperature water.

[0016]

1 to 3, Y is a bathtub, and the bathtub Y has a bathtub body 1 and a door 2.
The bathtub body 1 has a pair of left and right side wall portions 1A and 1B, a front wall portion 1C, and an upper wall portion 1D. Then, the rear portion (the end portion on the side closer to the door 2) of the upper wall portion 1D is configured by the thin flap plate 1E. The flap plate 1E has its front end swingable in the up-down direction about an axis extending in the left-right direction, and can be fixed at a desired swing position. In such a bathtub body 1, the patient K is in the wheelchair A.
Is defined as a bathing space 3 to be introduced together, and the bathing space 3 is closed by closing the door 2. When the door 2 is closed, the bath space 3 has a flap plate 1E.
Through the opening 1F formed between the door 2 and the door 2 to the upper space. The bottom surface of such a bathtub Y directly faces the installation floor surface F (the structure has no bottom wall portion).

When bathing the patient K, the patient K is introduced into the bathing space 3 with the door 2 opened and the patient K placed on the wheelchair A. After that, the door 2 is closed. With the door 2 closed, the patient K is exposed from the bathtub Y only in the upper part of the neck, that is, the head and face, while the lower part of the neck is located in the bathing space 3. In this state, a plurality of shower nozzles provided inside the bath body 1 inject hot water having an appropriate temperature to the patient K to take a bath.

A hot and cold water supply system for supplying hot and cold water adjusted to an appropriate temperature to the shower nozzle of the bathtub body 1 will be described with reference to FIG. First, 10 is a mixing stopper, which is of a known wax thermomixing type. The manually operated operation part of the mixing stopper 10 is indicated by reference numeral 10a.

To the primary side, that is, the input side, of the mixing plug 10, a first system path 11 is connected and a second system path 12 branched from the first system path is connected. The first system path 11 is for supplying low temperature (normal temperature) water, and in the embodiment, tap water is supplied as it is. Second
A boiler 13 is connected to the system path 12, and a regulator (pressure reducing valve) 14 is connected to the downstream side of the boiler 13. That is, when the boiler 13 is operated, high-temperature hot water is supplied to the mixing stopper 10 from the second system passage 12. By manually operating the operation unit 14a of the regulator 14, the pressure (flow rate) of the hot water supplied to the mixing stopper 10 is changed.

A manifold (branching pipe) 16 is connected to the secondary side, that is, the outlet side, of the mixing stopper 10 via a system passage 15. The manifold 16 is connected to a waste water tank 19 via two system paths 17 and 18 which are parallel to each other. Shower valves 20 and 21, which are electromagnetic on-off valves, are connected to the paths 17 and 18, respectively. The shower valves 20 and 21 are small in size because of the cost. However, when a large shower valve is used, only one shower valve can be provided (the number of paths 17 and 18 is also one). Put together). The waste water tank 19 has a small capacity, for example, a small capacity of about 30 cc to 50 cc.

A hand nozzle 25 provided in the bathtub body 1 and operated by a caregiver is connected to the manifold 16 via a system passage 24 (see also FIG. 2). An adjustment bubble 26, which is manually operated to adjust the amount of hot and cold water jetted from the hand nozzle 25, is provided in the system passage 24.
Are connected.

A drainage channel 27 for waste water is further connected to the manifold 16. In this line 27,
A first drain valve 28, which is an electromagnetic on-off valve, and a flow rate limiting valve 29 are connected in series with each other. The flow rate limiting valve 29 limits the flow rate of the system passage 27 so that the maximum flow rate is, for example, about 5 liters / minute, and this limit flow rate is set to a value corresponding to the minimum flow rate required for ignition of the boiler 13. Has been done.

In the waste water tank 19, a plurality of shower nozzles 3 (12 in the embodiment) provided in the bath body 1 are provided.
0a to 30f and 30g to 30l are connected. That is, for the passage 31 extending from the waste water tank 19,
Shower nozzles 30a to 30f are connected. Further, shower nozzles 30g to 30l are connected to the system passage 32 extending from the waste water tank 19.

A system path 35 for waste water is further connected to the waste water tank 19, and a second drain valve 36 is connected to the system path 35. In the embodiment, the second drain valve 36 is automatically opened when the pressure in the waste water tank 19 is equal to or lower than a predetermined pressure (for example, 0.3 kg / square cm), and is closed in other cases. It is like this.

A temperature sensor S1 for detecting the temperature of hot and cold water flowing inside and a pressure sensor S2 for detecting the pressure of hot and cold water are connected to the above-mentioned system passage 15 which connects the mixing stopper 10 and the manifold 16. There is.

FIGS. 5 to 7 show specific examples of the hot water supply system shown in FIG. 4 in which a portion downstream of the mixing stopper 10 is incorporated in the bath body 1. The pair of left and right side wall portions 1A and 1B each have a hollow structure by combining an inner panel and an outer panel. Further, among the pipes, valves and the like which form the hot and cold water supply system passage, members which do not need to be exposed to the outside are arranged in the side wall portions 1A and 1B so as not to be visible from the outside.

On the premise of the above, the system passage 31 for the shower nozzles 30a to 30f is the shower nozzle 30a.
First pipe 31a to which ~ 30d is connected, and first pipe 31
It has the 2nd piping 31b branched from a. The third pipe 31c is connected to the second pipe 31b (see FIG. 7). The third pipe 31c extends into the bathing space 3 and is fixed to the lower surface of the flap plate 1E described above. The two shower nozzles 30e and 30f are connected to the third pipe 31c.
Are connected.

Channel 3 for shower nozzles 30g-30l
2 has the 1st piping 32a-the 4th 4th piping 32d.
The first pipe 32a is arranged in one side wall portion 1A having the shower nozzles 30a to 30d (see FIG. 5). The second pipe 32b is connected to the first pipe 32a (see FIG. 7) and traverses the bathing space 3 to the other side wall portion 1
It extends to B. The third pipe 32c is the second pipe 32.
The shower nozzle 30g is connected to the third pipe 32c and is disposed in the other side wall portion 1B.
~ 30j are connected. The fourth pipe 32d is branched from the third pipe 32c and extends into the bathing space 3 (see FIG. 7), and the shower nozzles 30k and 30l are connected to the fourth pipe 32d.

The shower nozzles 30a to 30d and 30g to 30j provided on the left and right side wall portions 1A and 1B are
It is arranged so as to be exposed in the bathing space 3, and hot water is jetted from the side to the patient K in the bathing space 3. Further, the two pipes 31c and 32d arranged in the bathing space 3 are fixed to the lower surface of the flap plate 1E, respectively. And the pipe 31c or 32
Two front shower nozzles 3 connected to d
0e and 30k are set so as to spray hot water from the chest of the patient K in the bathing space 3 toward the abdomen (see also FIG. 8). In addition, the two shower nozzles 30fe and 3 which are connected to the pipes 31c or 32d and are located at the rear side.
0l is set so that hot water is jetted toward the back of the patient K in the bathing space 3 (see also FIG. 8). The two pipes 31c and 32d located in the bathing space 3 are made to have flexibility so that they can follow the swing of the flap plate 1E described later.

As is clear from FIG. 5 and FIG. 6, each member constituting the hot and cold water supply system passage provided in the bathtub body 1 is positioned so as to be as low as possible except for the shower nozzles 30a to 30l. ing. Especially, the waste water tank 19
Is set at a low position so that the hot and cold water in the system passage downstream of the shower valves 20, 21 and the hot and cold water in the system passage connected to the shower nozzles 30a to 30l are collected in the waste water tank 16 by gravity. ing. Similarly, the manifold 16 is also set at a low position so that the hot and cold water in the system passage continuing to the manifold 16 is collected in the manifold 16 by its own weight. In addition, the waste water tank 16 and the manifold 1
The system path connected to 6 is set so as not to have a trap portion (a bent portion that is convex downward) so that hot water does not accumulate in the trap portion.

The system path 24 for the hand nozzle 25 is
It is composed of a pipe 24a and a flexible pipe (hose) 24b connected to the pipe 24a and extending to the outside of the bath body 1 (see FIG. 2), and a hand nozzle 25 is connected to the tip of the pipe 24b. The hand nozzle 25 is manually operated by a caregiver outside the bath body 1, and ON / OFF (opening / closing) of hot water is performed by manually operating the operation unit 25a (FIG. 4). reference).

FIG. 8 shows an example of a mechanism for changing the swing position of the flap plate 1E. That is, the frame 40 of the flap plate 1E is held by the pair of left and right side wall portions 1A and 1B so as to be vertically swingable about an axis extending in the left and right direction. The frame 40 is rotatably connected to at least one of the side wall portions 1A or 1B by a stretchable support stay 41. The extension and contraction length of the support stay 41 is variable. That is, the support stay 41 has a cylinder portion 41a connected to at least one of the side wall portions 1A or 1B and a rod portion 41b slidably fitted in the cylinder portion 41a, and the tip portion of the rod portion 41b. Is rotatably connected to the frame 41.

For example, the length of protrusion of the rod portion 41b from the cylinder portion 41a is variable by an expansion / contraction adjusting mechanism using a screw mechanism. For example, the protruding length of the rod portion 41b from the cylinder portion 41a is changed by rotating the operating portion 41c in a predetermined direction by a manual operation. Further, after the change, the operating portion 41c is rotated in the direction opposite to the predetermined direction of the fine k casting, so that the operation portion 41c is locked to the changed protruding length.

By changing the length of the support stay 41, the vertical swing position of the flap plate 1E is changed.
When the height of the seat of the wheelchair A is fixed, when the tall patient K takes a bath, the flap plate 1E is set to a high swing position, and when the short patient K baths, the flap plate 1E is set to a high swing position. 1E is set to a low swing position. Thus, patient K
By changing the flap plate 1E to an appropriate height according to the height of the person, it becomes unnecessary to change the height of the seat portion of the wheelchair A. As described above, the fact that the height of the seat portion of the wheelchair A does not need to be changed means that the wheelchair A can be an inexpensive one that does not have a height adjusting jack mechanism and is hard to break down. It will bring advantages.

Referring again to FIG. 4, U is a controller (control unit) constructed by using a microcomputer. Detection signals from the sensors S1 and S2 are input to the controller U. The controller U controls the shower valves 19 and 20 and the first drain valve 25. The controller U is equipped with a display section 38 for displaying the temperature detected by the temperature detection sensor S1, and a manually operated hot water request switch SW.
1 and a hot water stop switch SW2 are provided.

An example of hot water supply control by the controller U will be described with reference to the flowchart of FIG.
In the following description, Q indicates a step. When the power switch of the system (not shown) is turned on, the flag is set to 0 by the initialization of the system and the shower valves 20 and 21 are closed (the shower valves 20 and 21 are It is preferable to keep it normally closed for safety).

Based on the above, first, in Q1, it is judged whether or not the hot water discharge request switch (exit switch) SW1 has been operated. If the determination in Q1 is YES, after the flag is set to 1 in Q2, then Q3
At, the first drain valve 28 is opened. As a result, the waste water tank 19 is provided on the downstream side of the mixing stopper 10.
The hot and cold water in the hot and cold water supply system passage on the upstream side is discharged to the outside through the first drain valve 28. At this time, the flow rate limiting valve 29 prevents a large amount of hot water from being discharged. Further, the flow rate flowing through the boiler 13 also becomes small, and it becomes possible to supply high-temperature water to the mixing stopper 10 early.

After Q3, at Q4, the temperature sensor S
Whether or not the detected temperature detected in 1 is within the first predetermined temperature range, more specifically, a temperature suitable for shower bathing, for example, 3
It is determined whether or not the temperature range is from 9 degrees to 41 degrees C.
If NO in this Q4, the process returns to Q3. Over time, the temperature of the hot water discharged from the mixing tap 10 rises, and eventually the determination in Q4 becomes YES. If YES in the determination in Q4, it is determined in Q5 whether or not the detected temperature is within the first predetermined temperature range for a predetermined time, for example, 4 seconds. This determination of Q5 is to confirm whether or not the temperature of the hot water discharged from the mixing stopper 10 is stable in an appropriate temperature state. When the determination in Q5 is NO, the process returns to Q3 and waits until the temperature of the hot water discharged from the mixing tap 10 stabilizes within the first predetermined temperature range.

If the determination in Q5 is YES, the shower valves 20, 21 are opened in Q6, while
The first drain valve 28 is closed. As a result, the hot and cold water having a proper temperature from the mixing stopper 10 flows into the waste water tank 19. By supplying hot water from the mixing tap 10 to the waste water tank 19, the pressure thereof rises, so that the second drain valve 36 is automatically closed. As a result, the hot and cold water discharged from the mixing tap 10 is supplied to the shower nozzles 30a to 30l through the waste water tank 19, and the hot and cold water is jetted to the patient K. The hand nozzle 25 is appropriately used to wash the head of the patient K and the like. Since the system passage downstream of the shower valves 20 and 21 is empty in advance, the shower valve 2
The water hammer phenomenon does not occur when hot water is supplied to the downstream side through 0 and 21.

After Q6, the process returns to Q1 again. When the process returns once to Q1 through Q6, the determination in Q1 is NO, and in this case, in Q7, it is determined whether or not the flag is 1. When returning from Q6 to Q1, it is judged Y in Q7.
The status becomes ES, and at this time, it is determined in Q8 whether or not the stop switch SW2 has been operated. When the determination in Q8 is NO, that is, when the shower bath is continued, the detected temperature detected by the temperature sensor S1 in Q9 is in the second predetermined temperature range, more specifically, 3
It is determined whether or not the range is from 7 degrees to 42 degrees C. The second predetermined temperature range is expanded to both the low temperature side and the high temperature side with respect to the first predetermined temperature range (in the embodiment, expanded to the low temperature side and the high temperature side by 2 degrees). YE in this Q9 judgment
In the case of S, the process proceeds to Q6 and the shower bathing is continued.

If NO in the above Q9, it means that the hot and cold water is too low or too hot for some reason while taking a shower bath. At this time,
Return to Q3. Since the second predetermined temperature range is wider than the first predetermined temperature range, hunting is prevented, that is, the case of shifting from Q9 to Q6 and the case of shifting from QQ9 to Q3 are frequently repeated. It prevents the situation from happening.

When the determination in Q8 is YES, Q10
In, after the flag is reset to 0, the shower valves 20 and 21 are closed in Q11, and the control ends. By closing the shower valves 20 and 21, the pressure on the downstream side of the shower valves 20 and 21 decreases, and eventually the pressure in the waste water tank 19 becomes substantially zero. Therefore, the second drain valve 36 automatically opens. The hot and cold water in the hot and cold water supply system passages on the upstream side and the downstream side of the waste water tank 19 is discharged to the outside through the second drain valve 36.

Since the first drain valve 28 is not closed during the treatment of Q11, the mixing stopper 10 and the shower valves 20, 2 are kept for a while after the treatment of Q11.
In the hot and cold water path between 1 and 1, a suitable temperature or a temperature slightly lower than the suitable temperature will remain, and when the next patient operates the switch SW1 that comes out again when taking a shower bath, the switch SW1 will promptly exit from Q1. After going from Q2 to Q5 to Q6, shower bathing for the next patient can be started early.

When the result of the determination in Q7 is NO, the process returns to Q1. In this state, after the power switch is turned on, the output switch SW1 is not operated (the output switch SW1 is operated. Waiting for).

In the process of Q11, the first drain valve 28 may be opened so that all the hot and cold water in the path downstream of the mixing stopper 10 can be discharged to the outside. In this case, even if a considerable amount of time elapses before the next shower bathing, it is possible to prevent the germs from propagating in the hot water supply system passage. In addition, the first drain valve 28
Is set to the normally open type, when a considerable amount of time elapses before the next bathing of the shower is predicted, that is, the power switch is turned off, and the first drain valve 28 is automatically opened in conjunction with this OFF operation. By setting the valve to be opened, all the hot and cold water in the hot and cold water passage on the downstream side of the mixing stopper 10 is discharged to the outside, which is preferable in preventing the above-mentioned various bacteria.

Bathtub Y before or after showering
The hand nozzle 25 is used to wash the. Incidentally, the control flow at this time may be the same as that in FIG. 9, but as a dedicated control mode for cleaning, the shower valves 20 and 21 may be closed and the first drain valve 28 may also be closed. (If the temperature of the hot water discharged from the mixing tap 10 is the same as for the shower bath, Q1 to Q
When the washing is performed with low temperature hot water, the steps of Q1 to Q6 are unnecessary, and the shower valves 20, 21 and the first drain valve 28 are simply closed. Alternatively, the boiler 13 can be deactivated.

Here, regarding the temperature adjustment and the flow rate adjustment of the hot water discharged from the mixing tap 10, FIG. 4, FIG. 10 to FIG.
This will be described with reference to FIG. First, the first system path 11 serving as a low-temperature hot water supply system path does not have a regulator. Further, the pressure in the first system passage 11 is the pressure in the second system passage 12 (regulator 14
The pressure is set to be 0.5 kg / square cm or more. As a result, the boiler 1
In a state where the temperature of the hot water after passing through 3 is stable, the hot water having a substantially constant flow rate and a substantially constant temperature is supplied from the mixing stopper 10.

10 and 11 show the case where the temperature of the low temperature water flowing through the first system passage 11 is 13 ° C. and the temperature of the hot water flowing through the second system passage 12 is 60 ° C. Yes (corresponding to hot season). Then, FIG. 10 shows the first route 1
1 shows the relationship between the pressure in 1 (low temperature pressure), the pressure in the second system passage 12 (high temperature pressure), and the temperature of hot water discharged from the mixing plug 10 (discharge temperature). Further, FIG. 11 shows the relationship between the low temperature pressure, the high temperature pressure, and the flow rate of hot and cold water discharged from the mixing plug 10 (discharge flow rate).

Similarly, FIGS. 12 and 13 show the first system path 11
The figure shows the case where the temperature of the low temperature water flowing through the water is 12 degrees C and the temperature of the high temperature hot water flowing through the second passage 12 is 48 degrees C (corresponding to the cold season). Then, FIG. 12 shows the relationship between the low temperature pressure, the high temperature pressure, and the discharge temperature. Further, FIG. 13 shows the relationship between the low temperature pressure, the high temperature pressure, and the discharge flow rate.

As is apparent from FIGS. 10 to 13, it is understood that when the high temperature pressure is kept constant and the low temperature pressure is changed, the discharge temperature and the discharge flow rate substantially depend only on the high temperature pressure. . The low temperature pressure is 0.
As long as the condition of 5 kg / square cm or more is maintained,
It is understood that the change amount of the discharge temperature and the discharge flow rate due to the change of the low temperature pressure becomes extremely small.

In summary of the above, in the range where the low temperature pressure is higher than the high temperature pressure by 0.5 kg / square cm or more, only by adjusting the high temperature pressure, the discharge flow rate ( It is possible to change the discharge pressure) in a large range. For example, when the low temperature pressure is set to 2.5 kg / square cm which is obtained as the tap water pressure, the high temperature pressure is changed between 1 kg / square cm and 2 kg / square cm. ~ 42 degrees C
The discharge flow rate can be arbitrarily changed depending on the temperature range. More specifically, the high temperature pressure is adjusted in three stages, for example, "weak = low temperature discharge temperature and low discharge flow rate" and "medium =
It is possible to arbitrarily obtain "medium temperature discharge temperature and medium discharge flow rate" and "strong = high temperature discharge temperature and large discharge flow rate" (however, the range of temperature change is a small change in the range of appropriate temperature).

As described above, the regulator for adjusting the low temperature pressure
By eliminating the data, it is also advantageous in terms of cost. Although the discharge temperature can be changed by operating the operation portion 10a of the mixing stopper 10, it is generally impossible to change the flow rate depending on the mixing stopper 10.

Although the embodiments have been described above, the present invention can be similarly applied to a stretcher-type shower bath apparatus in which the patient K takes a shower while being placed on a stretcher. A dedicated flow rate adjusting valve for adjusting the discharge flow rate from the mixing stopper 10 may be separately provided. The operation unit 14a of the regulator 14 can also be controlled by the controller U (the pressure adjustment by the regulator 14, that is, the adjustment of the degree of pressure reduction is not necessary to be frequently performed, that is, it is sufficient to perform it every season change. It is preferable to do this).

The second drain valve 36 may be manually operated or may be controlled by the controller U. Controller U
In the case of controlling by, it is preferable to control so that the second drain valve 36 is opened when the shower bath stop operation is performed. This opened second drain valve 3
6 is preferably controlled to be closed when the shower valves 20 and 21 are closed.

Since the waste water tank 19 functions as a gathering portion of hot water flowing from the plurality of shower nozzles 30a to 30l and the like, it is possible not to separately provide a volume portion such as the waste water tank 19. Is. The object of the present invention is not limited to what is specified, and also implicitly includes providing what is expressed as substantially preferable or advantageous.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a shower bathtub to which the present invention is applied.

FIG. 2 is a perspective view showing a state where a door of the bath tank of FIG. 1 is opened.

FIG. 3 is a side view showing a state in which a patient is introduced into a bath with a stretcher in FIG. 1.

FIG. 4 is a system diagram for supplying hot water.

FIG. 5 is a view showing a specific arrangement example of a hot and cold water supply system path to a bath tub.

FIG. 6 is a diagram showing a specific arrangement example of a hot and cold water supply system path to a bath tub.

FIG. 7 is a diagram showing a specific arrangement example of a hot and cold water supply system passage to a bath tub.

FIG. 8 is a simplified side view of essential parts showing the relationship between the flap plate of the bath tub and the patient.

FIG. 9 is a flowchart showing a control example of the controller.

FIG. 10 is a characteristic diagram showing the relationship between the low temperature pressure, the high temperature pressure, and the discharge temperature from the mixing stopper.

FIG. 11 is a characteristic diagram showing the relationship between the low temperature pressure, the high temperature pressure, and the discharge flow rate from the mixing stopper.

FIG. 12 is another characteristic diagram showing the relationship between the low temperature pressure, the high temperature pressure, and the discharge temperature from the mixing stopper.

FIG. 13 is another characteristic diagram showing the relationship between the low temperature pressure, the high temperature pressure, and the discharge flow rate from the mixing stopper.

[Explanation of symbols]

Y: Bathtub A: Wheelchair K: patient F: Floor U: Controller S1: Temperature sensor SW1: Hot water request switch SW2: Hot water stop switch 1: Bathtub body 1A: left side wall 1B: right side wall 1C: Front wall 1D: Upper wall 1E flap board 1F: Opening 2: Door 3: Bathing space 10: Mixing stopper 11: 1st system path (for water supply on the upstream side of the mixing tap) 12: Second passage (for supplying hot water upstream of the mixing tap) 13: Boiler 14: Regulator (for high temperature pressure adjustment) 15: Hot water supply system passage (mixing plug-manifold) 16: Manifold (hot water supply system path) 17: Hot water supply route 18: Hot water supply route 19: Waste water tank 20: Shower valve 21: Shower valve 25: Hand nozzle 26: Flow control valve 27: Drainage system 28: First drain valve 29: Flow rate limiting valve 30a to 30l: shower nozzle 31: Hot water supply route 32: Hot water supply route 35: Drainage system 36: Second drain valve

─────────────────────────────────────────────────── ─── Continuation of the front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) A61H 33/00 310 F24D 17/00

Claims (6)

(57) [Claims] 1. A bathtub provided with a shower nozzle for injecting hot and cold water into the bathing space, which defines a bathing space to be introduced while the patient is placed on a stretcher or a wheelchair. A first system path for supplying water, a second system path for supplying high-temperature hot water heated by a boiler, and water supplied from the first system path, which is of a wax thermomixing type. A mixing stopper for mixing hot water supplied from the second passage to discharge hot water after mixing; and a third passage supplying the hot water discharged from the mixing stopper to the shower nozzle. A pressure reducing regulator is connected only to the second system passage of the first system passage and the second system passage, and the pressure of the first system passage is reduced by the regulator. Than the pressure in the second passage of 0.5 kg / Is set to be square cm or larger, the hot water supplying device in the shower bath apparatus characterized by. 2. The boiler according to claim 1, wherein the second system path is configured as a branch system path branched from the first system path, and the boiler is connected to the branch system path. The hot water supply device in the shower bathing device, wherein the regulator is connected on the downstream side of the. 3. The hot and cold water supply apparatus according to claim 1 or 2, wherein the regulator has an operation portion for changing the degree of pressure reduction by manual operation. 4. The shower valve according to any one of claims 1 to 3, wherein the shower valve is connected to the third system passage and stops the supply of hot water from the mixing stopper to the shower nozzle. A first drainage valve connected between the mixing valve and the shower valve of the three system passages; a second drainage valve connected between the shower valve and the shower nozzle of the third system passage; A temperature sensor that detects the temperature of hot and cold water between the mixing valve and the shower valve in the third passage, and the shower valve and the first drain valve according to the detected temperature detected by the temperature sensor. And a controller for controlling opening and closing of the second drain valve, wherein the second drain valve has a pressure in the third system passage between the shower valve and the shower nozzle reduced to a predetermined pressure or less. The controller is configured to automatically open the valve, and the controller provides the shower on the condition that the temperature detected by the temperature sensor is within the first predetermined temperature range for a predetermined time. Controlling to open the valve and close the first drain valve.
A hot and cold water supply device for a shower bathing device. 5. The controller according to claim 4, wherein the controller detects that the temperature detected by the temperature sensor is within a second predetermined temperature range in which the high temperature side and the low temperature side are respectively expanded from the first predetermined temperature range. ,
While maintaining the open state of the shower valve and the closed state of the first drain valve, close the shower valve and close the first drain valve when the detected temperature is not within the second predetermined temperature range. A hot and cold water supply device for a shower bathing device, which is controlled so as to be opened. 6. The shower valve according to claim 4 or 5, wherein a plurality of the shower nozzles are provided, and the shower valve and the plurality of shower nozzles are provided between the shower valve and the plurality of shower nozzles in the third passage. The hot water supply device in the shower bathing device is characterized in that a waste water tank connected to is connected, and the second drain valve is connected to the waste water tank.