JP4502688B2 - Bathing device with safety management mechanism - Google Patents

Description

  The present invention relates to a hot water temperature management mechanism of a bathing apparatus that has a bathtub and a hot water tank, inserts a wheelchair into the bathtub, transfers hot water from the hot water tank into the bathtub, and bathes a bather.

  The conventional hot water management device for a bathtub with a tank is provided with a temperature sensor that detects the temperature of the hot water in the tank, and when the temperature of the hot water in the tank detected by the temperature sensor deviates from the set temperature, the tank is moved to the bathtub body. The control part which stops hot water supply of this is provided.

According to the prior art, it is possible to transfer hot water at an appropriate temperature from the tank to the bathtub body without checking the hot water temperature in the tank by an assistant, but when the temperature sensor provided in the tank fails There was a problem that hot water deviating from the set temperature was erroneously transferred to the bathtub body.
Japanese Patent No. 3181837

  An object of the present invention is made in view of the above problems, and a plurality of hot water temperature management mechanisms for managing abnormal hot water temperature are provided, and even when one hot water temperature management mechanism fails and does not operate normally. It is an object of the present invention to provide a bathing apparatus that is improved in safety so as not to give an abnormal hot water temperature to a bather by operating another hot water temperature management mechanism.

In order to achieve the above object, the present invention has a bathtub 1 and a hot water tank 2, inserts a wheelchair 3 into the bathtub 1, transfers hot water from the hot water tank 2 into the bathtub 1, and bathes a bather. In bathing equipment,
A first hot water temperature management mechanism 4 for detecting an abnormal hot water temperature flowing in the hot water storage pipe and controlling the hot water storage operation to the hot water tank 2;
A second hot water temperature management mechanism 5 for controlling the hot water of the abnormal hot water stored in the hot water tank 2;
A third hot water temperature management mechanism 6 that detects an abnormal hot water temperature in the bathtub 1 and controls the operation of transferring the hot water from the hot water tank 2 to the bathtub 1 ;
When the first hot water temperature management mechanism 4 detects that the hot water temperature flowing through the hot water storage pipe is abnormal, the first hot water temperature management mechanism 4 stops the hot water storage in the hot water tank 2 and discharges the hot water from the bathing device 11. It is characterized by.

A main temperature sensor 9 and a sub-temperature sensor 10 were installed in a hot water storage pipe.

  When the second hot water temperature management mechanism 5 detects that the hot water temperature stored in the hot water tank 2 is abnormal, the second hot water temperature management mechanism 5 discharges the hot water to the outside of the bathing apparatus 11.

  When the third hot water temperature safety management mechanism 6 detects that the hot water temperature transferred into the bathtub 1 is abnormal, the third hot water temperature safety management mechanism 6 stops the transfer of hot water from the hot water tank 2 to the bathtub 1 or hot water. After the transfer is stopped, the hot water is discharged out of the bathing apparatus 11.

The present invention has a bathtub 1 and a hot water tank 2, a hot water storage pipe in a bathing apparatus for inserting a wheelchair 3 into the bathtub 1, transferring hot water from the hot water tank 2 into the bathtub 1, and bathing a bather. A first hot water temperature management mechanism 4 that detects an abnormal hot water temperature flowing through the inside and controls the hot water storage operation to the hot water tank 2; and a second hot water temperature control device that controls the hot water of the abnormal hot water stored in the hot water tank 2. A hot water temperature management mechanism 5 and a third hot water temperature management mechanism 6 for detecting an abnormal hot water temperature in the bathtub 1 and controlling the operation of transferring the abnormal hot water from the hot water tank 2 to the bathtub 1 are provided. When the first hot water temperature management mechanism 4 detects that the temperature of the hot water flowing through the hot water storage pipe is abnormal, the first hot water temperature management mechanism 4 stops the hot water storage in the hot water tank 2 and discharges the hot water to the outside of the bath device 11. To do .

In the present invention, when the first hot water temperature management mechanism 4 detects that the hot water temperature flowing through the hot water storage pipe is abnormal, the hot water storage in the hot water tank 2 is stopped and the hot water is removed from the bathing device 11. Therefore, when the first hot water temperature management mechanism 4 is operating normally, hot water with an abnormal hot water temperature is not stored in the hot water tank 2.

Further, even if one hot water temperature management mechanism fails and does not operate normally, the remaining hot water temperature management mechanisms operate appropriately and stop the operation of transferring abnormal hot water to the bathtub 1, so that, for example, for bathers It does not lead to dangerous situations such as giving hot water that is far from the set temperature value and causing burns, and prevents inconvenient situations such as adding low temperature hot water to surprise the bather. it can.
In addition, since three hot water temperature management mechanisms are provided, even if the two hot water temperature management mechanisms fail at the same time and do not operate normally, the remaining hot water temperature management mechanism operates as appropriate to cause abnormal hot water temperature to the bathtub 1. The hot water transfer operation can be stopped reliably, and safety can be further improved.

  In the present invention, the main temperature sensor 9 and the auxiliary temperature sensor 10 are provided in the hot water storage pipe, so that the hot water temperature in the hot water storage pipe is reliably detected by the two main / sub temperature sensors 9 and 10. Can be done. That is, when one temperature sensor, for example, the main temperature sensor 9 fails due to “disconnection” or “short circuit”, the main temperature sensor 9 in the failed state can be identified by the control unit 31, and the other temperature operating normally. Since the hot water temperature in the hot water storage pipe can be reliably detected by using the sensor and the sub temperature sensor 10, the hot water temperature is continuously detected by the failed main temperature sensor 9, and hot water with an abnormal hot water temperature is supplied into the hot water tank 2. Can avoid inconvenient situations.

  Further, the control unit 31 compares the detected temperature values of the hot and cold water by the main temperature sensor 9 and the sub temperature sensor 10, and when both the temperature sensors 9 and 10 are operating normally, the difference value of the detected temperatures. Is approximately zero, but if either one of the temperature sensors breaks down due to “contact failure (breaking device)” or “rare short (short circuit device)”, the main temperature sensor 9 and the sub temperature sensor 10 The detected temperature difference value changes from approximately zero to plus or minus. In this failure state, the control unit 31 cannot determine which temperature sensor is normal and which temperature sensor is abnormal. However, the control unit 31 quickly detects the change. Since the main temperature sensor 9 and the sub temperature sensor 10 are both determined to be in a failure state and the hot water storage operation is stopped, the hot water is supplied to the hot water tank 2 without determining the normal / abnormal state of the main / sub temperature sensors 9 and 10. Therefore, it is possible to avoid an inconvenient situation in which hot water having an abnormal hot water temperature is stored in the hot water tank 2 by mistake.

  In the present invention, when the second hot water temperature management mechanism 5 detects that the hot water temperature stored in the hot water tank 2 is abnormal, the hot water is discharged out of the bath device 11. When the second hot water temperature management mechanism 5 is operating normally, the hot water stored in the hot water tank 2 is only the appropriate hot water, and the assistant does not check the hot water temperature in the hot water tank 2. By simply confirming that a predetermined amount of hot water is stored in the hot water tank 2, the hot water can be transferred from the hot water tank 2 to the bathtub 1, and the burden on the assistant's hot water temperature checking work can be reduced. At the same time, the bather can be safely bathed without transferring hot water having an abnormal hot water temperature to the bathtub 1. In addition, it is possible to avoid a dangerous situation in which hot hot water is left in the hot water storage tank 2 in a state where the hot water is stored and an assistant accidentally touches the hot water in the hot water tank 2 to cause a burn.

  In the case where the heating means is arranged in the piping system 3 that connects the bathtub body 1 and the tank 2 as in the prior art, even if the hot water temperature in the tank 2 is appropriate, the heating means is heated by the heating means. Although there is a possibility that the hot water temperature afterwards becomes inappropriate (high temperature) and uncomfortable for the bather, in the present invention, the third hot water safety management mechanism 6 is provided in the bathtub 1. The detected hot water temperature is detected. If the hot water temperature is abnormal, the hot water transfer from the hot water tank 2 to the bathtub 1 is stopped, so the hot water temperature in the bathtub 1 can be detected more accurately. As a result of transferring hot hot water deviating from the set temperature value to the bathtub 1, there is no inconvenient situation seen in the above-mentioned prior art, which causes discomfort to the bather.

  The purpose of providing a bathing device with improved safety so that bathers are not given abnormal hot water is detected by detecting the abnormal hot water temperature of hot water flowing in the hot water storage pipe and The first hot water temperature management mechanism 4 to be controlled, the second hot water temperature management mechanism 5 to control the hot water of the abnormal hot water stored in the hot water tank 2, and the abnormal hot water temperature of the hot water in the bathtub 1 are detected. This was realized by providing at least two or more of the third hot water temperature management mechanisms 6 that control the transfer operation of the hot water of the abnormal hot water temperature from the hot water tank 2 to the bathtub 1.

Embodiment 1 of the present invention will be described below with reference to FIGS.
FIG. 1 is a piping system diagram of the bathing apparatus 11, FIG. 2 is an external perspective view showing the bathing apparatus 11 in a state before the wheelchair 3 is inserted into the bathtub 1, and FIG. 3 is a wheelchair 3 in the bathtub 1. It is an external appearance perspective view which shows the bathing apparatus 11 of the state after inserting. As shown in FIG. 2, the bathing apparatus 11 includes a bathtub 1 having an opening 35 formed on one side and a wheelchair 3 on which a bather is placed.

A hot water tank 2 is integrally formed in the bathtub 1 in the direction opposite to the opening 35. Although the detailed description and illustration are omitted, the opening 35 is formed on the inner surface of the left and right side walls 1a and 1b of the bathtub 1 so as to be inclined from the opening 35 side toward the back side of the bathtub 1. It has a joint surface composed of an inner wall and a bottom wall, and a flat surface formed on the backrest 25 of the wheelchair 3 can come into contact with the joint surface. The bathtub 1 and the backrest 25 are fixed by fixing means (not shown) provided across the bathtub 1 and the wheelchair 3, and the opening 35 is closed by the backrest 25.
The bathtub 1 and the hot water tank 2 are connected to each other by a hot water supply pipe 13 via a pump 12, and hot water stored in the hot water tank 2 is transferred to the bathtub 1 by the pump 12.

  Two pipes, a pipe 7 and a pipe 8, are provided as pipes for leading the hot water supplied from the hot water supply sources 14 a and 14 b to the hot water storage tank 2. As for the piping 7, the hot water discharge piping 7b is branched and extended in the middle of the hot water storage piping 7a. In the pipe 8, a pipe 15 is branched and extended in the middle of the pipe 8, and further, the pipe 15 is branched and extended into a pipe 15a to which a hand shower 16 is connected at a tip portion and a pipe 15b for draining hot water. Is done. In addition, although illustration is abbreviate | omitted, you may comprise so that two piping of the piping 7 and the piping 8 may be branched and extended from the hot water supply source provided in one place.

  An electric temperature control valve 17a, main / sub temperature sensors 9a and 10a, and a hot water solenoid valve 18a are mounted on the pipe 7a in this order from the upstream side of the pipe 7a, and a hot water solenoid valve 18b is mounted on the pipe 7b. The Similarly, an electric temperature control valve 17b, main / sub temperature sensors 9b and 10b, and a hot water solenoid valve 19 are attached to the pipe 8 in order from the upstream side of the pipe 8. A solenoid valve 20a for hand shower is mounted on the pipe 15a, and an electromagnetic valve 20b for hot water discharge is mounted on the pipe 15b.

  The suction port 21 of the hot water tank 2 and the hot water supply port 22 of the bathtub 1 are connected to each other via a pump 12 through a hot water supply pipe 13. A motor valve 23 a is disposed on the hot water supply pipe 13 a that connects the suction port 21 and the suction port side of the pump 12, and a motor valve 23 b is disposed on the hot water supply pipe 13 b that connects the discharge port side of the pump 12 and the hot water supply port 22.

  A hot and cold hot water supply pipe 26 is branched from the hot water supply pipe 13 a on the downstream side of the motor valve 23 a, and the hot and cold hot water supply pipe 26 is branched at an intermediate position and connected to the hot and cold hot water outlet 27 of the bathtub 1. A motor valve 23c and a motor valve 23d for hot water discharge are provided in the hot water supply / discharge pipe 26. A hot water supply pipe 28 is branched from the hot water supply pipe 13b on the upstream side of the motor valve 23b, and a hot water discharge motor valve 23e is provided in the hot water supply pipe 28.

A temperature sensor 29 that detects the temperature of the hot water in the bathtub 1 at a position below the side wall of the bathtub 1 includes six water level sensors 32a, 32b, 32c, 32d, 32e, and 32f (specifically, A capacitive proximity sensor) is provided. The six water level sensors 32 are fixed in the order of the height positions of the water level sensors 32a <32b <32c <32d <32e <32f with the floor surface 36 as a reference surface. The water level sensor 32 a detects the lower limit water level in the bathtub 1, the water level sensor 32 b detects the water level in the bathtub 1 that allows the pump 12 to operate, and the water level sensor 32 f detects the upper limit water level in the bathtub 1. The water level sensors 32c, 32d, and 32e detect the water level in the bathtub 1 as “low”, “medium”, and “high” levels, respectively. Note that the fixing position of the temperature sensor 29 is set lower than the water level sensor 32b.
A temperature sensor 30 for detecting the temperature of the hot water stored in the hot water tank 2 is fixed to the lower position of the side wall of the hot water tank 2, and two water level sensors (capacitive proximity sensors) are respectively provided at the lower and upper positions of the side wall. Sensors) 33a and 33b are provided. The fixing position of the temperature sensor 30 is set at a lower position than the water level sensor 33a.

  FIG. 4 shows a block diagram of an electrical configuration related to the bathing apparatus 11. The control unit 31 provided in the bathing device 11 appropriately obtains signals from the main and sub temperature sensors 9 and 10 to control the opening and closing of the solenoid valves 18, 19 and 20, and stores hot water in the hot water storage tank 2. Control the operation. Further, a signal from the temperature sensor 30 is obtained to appropriately control the opening and closing of the motor valve 23 group, thereby controlling the hot water draining operation in the hot water tank 2. Further, a signal from the temperature sensor 29 is obtained and the opening and closing of the motor valve 23 group is appropriately controlled to control the hot water transfer operation from the hot water tank 2 to the bathtub 1.

  The bathing device 11 includes a first hot water temperature management mechanism 4 for detecting an abnormal hot water temperature flowing through the hot water storage pipes 7 and 8 to be described later and controlling the hot water storage operation to the hot water tank 2, and the hot water tank 2. The second hot water temperature management mechanism 5 for controlling the discharge of the hot water stored in the hot water in the hot water, and the abnormal hot water temperature in the bathtub 1 is detected and transferred from the hot water tank 2 to the bathtub 1 A total of three hot water temperature management mechanisms, which are the third hot water temperature management mechanism 6 for controlling the operation, are provided.

  The first hot water temperature management mechanism 4 includes main / sub temperature sensors 9 and 10, electromagnetic valves 18, 19, and 20 (20b), and a control unit 31, and the second hot water temperature management mechanism 5 includes: The temperature sensor 30, the motor valve 23 group (23 a, 23 c, 23 d), and the control unit 31 are configured. The third hot water temperature management mechanism 6 includes a temperature sensor 29, a motor valve 23 (23d), and a control unit 31.

  Hereinafter, the operation of the first hot water temperature management mechanism 4 will be described. When the power source of the bathing apparatus 11 is turned on, all motor valve groups and electromagnetic valve groups related to the bathing apparatus 11 except the motor valves 23b, 23c, 23d, and 23e are set to an initial state in which they are closed. As described above, the pipe for guiding the hot water to the hot water tank 2 is provided with two pipes of the pipe 7 and the pipe 8, and the hand shower 16 is used when hot water is stored in the hot water tank 2. The hot water is stored using only the pipe 7 (basic hot water storage), and when the hand shower 16 is not used, the hot water is stored in the hot water storage tank 2 (rapid hot water storage) using the pipe 7 and the pipe 8 simultaneously.

  In the basic hot water storage using only the pipe 7, when an automatic hot water storage switch (not shown) provided on the operation panel 24 of the bathing device 11 is pressed and hot water storage is started, the hot water storage electromagnetic valve 18 a is closed and the hot water electromagnetic discharge is performed. With the valve 18b opened, the thermo valve of the electric temperature control valve 17a is moved to a set temperature value of hot water to be stored in the hot water tank 2, and hot water supplied from the hot water supply source 14a flows through the pipe 7a. It is discharged out of the bathing apparatus 11 via 7b.

  During the discharge operation, the main temperature sensor 9a has converged within a range of ± 2 ° C within the temperature of the hot water flowing through the pipe 7a continuously for a predetermined time (specifically, 5 seconds or more). When this is detected, the solenoid valve 18b is closed, the solenoid valve 18a is opened, and basic hot water storage into the hot water tank 2 is started.

  When the main temperature sensor 9a detects that the hot water temperature flowing through the pipe 7a does not converge within the range of ± 2 ° C. of the set temperature value during the basic hot water storage (is an abnormal hot water temperature) Then, the solenoid valve 18a is closed, the solenoid valve 18b is opened, and hot water is discharged out of the bathing apparatus 11. Accordingly, in the state where the first hot water temperature management mechanism 4 is operating normally, the hot water tank 2 does not store hot water having an abnormal hot water temperature, but stores only an appropriate hot water temperature within the set temperature value range. It will be. If the hot water temperature in the pipe 7a does not converge within the range of ± 2 ° C. of the set temperature value even after continuing to discharge the hot water for a predetermined time (= specifically 5 minutes), the solenoid valve 18b is closed. Basic hot water storage is stopped.

  A main temperature sensor 9a and a sub temperature sensor 10a are interposed at the same position of the pipe 7a. The main / sub temperature sensors 9a and 10a always detect the temperature of hot water flowing in the pipe 7a. The detected temperature values of the main and sub temperature sensors 9a and 10a are compared with a set temperature value of hot water to be stored in the control unit 31, and one of the temperature sensors, for example, the main temperature sensor 9a is disconnected. ”Or“ short circuit ”, and when an abnormal temperature value greatly deviating from the range of the set temperature value ± 2 ° C. is indicated, information indicating that the temperature sensor 9a is in a failure state is immediately displayed on the sensor failure indicator 34. The assistant can easily identify that the temperature sensor 9a is in a failure state. The sensor failure indicator 34 is provided on the operation panel 24.

  In the present invention, even if one of the main temperature sensors 9a is in a failure state, the temperature of the hot water flowing in the pipe 7a can be detected by the other normally operating sub temperature sensor 10a. Even when the temperature sensor 9a fails, the sub-temperature sensor 10a reliably detects the hot water temperature, and when the sub-temperature sensor 10a detects that the hot water temperature falls within the set temperature value ± 2 ° C., Hot water storage operation continues. Therefore, since the hot water storage operation is not stopped even when one of the main temperature sensors 9a reaches a failure state, the caregiver is convenient because the bathing operation is not interrupted. When the control unit 31 detects that one of the temperature sensors is in a failure state, the control may be performed so that the solenoid valve 18a is closed and the hot water storage operation is stopped.

  Further, the control unit 31 compares the detected temperature values by the main temperature sensor 9a and the sub temperature sensor 10a. Therefore, when one of the temperature sensors, for example, the sub temperature sensor 10a fails due to “contact failure (disconnection device)” or “rare short (short circuit device)”, both temperature sensors 9a and 10a The difference value of the detected temperature changes from approximately zero to the plus or minus direction, and the control unit 31 quickly detects the change.

  At the time of this failure, the control unit 31 cannot determine which temperature sensor is in a normal state and which temperature sensor is in an abnormal state. Therefore, the control unit 31 has both the temperature sensors 9a and 10a. The solenoid valve 18a is closed by discriminating that it is in a failure state, and the hot water storage operation is stopped. Then, information indicating that both the temperature sensors 9a and 10a are both in a failure state is displayed on the sensor failure indicator 34.

  When the hand shower 16 is not used, the pipe 7 and the pipe 8 are used simultaneously, and rapid hot water storage into the hot water storage tank 2 is performed. Since the operation of the first hot water temperature management mechanism 4 during hot water storage using the pipe 7 is as described above, the operation of the first hot water temperature management mechanism 4 during hot water storage using the pipe 8 will be described below. That is, when the automatic hot water storage switch is pressed and hot water storage is started, the hot water solenoid valve 19 and the hand shower electromagnetic valve 20a are closed, and the hot water solenoid valve 20b is opened. The thermo valve of the electric temperature control valve 17b is moved to a set temperature value of hot water to be stored in the hot water tank 2, and hot water supplied from the hot water supply source 14b flows through the pipe 8 and out of the bathing apparatus 11 via the pipe 15b. Discharged.

  During the discharge operation, the main temperature sensor 9b has converged within a range of ± 2 ° C. with the temperature of the hot water flowing through the pipe 8 continuously for a predetermined time (= specifically, 5 seconds or more). When this is detected, the solenoid valve 20b is closed, the solenoid valve 19 is opened, and hot water storage in the hot water tank 2 is started.

  When the temperature sensor 9b detects that the temperature of the hot water flowing in the pipe 8 does not converge within the range of ± 2 ° C. of the set temperature value during rapid hot water storage, the solenoid valve 19 is closed and the solenoid valve 20b. Is opened, and hot water is discharged out of the bath 11. Therefore, the hot water of the abnormal hot water temperature is not stored in the hot water storage tank 2 from the pipe 8 but only the appropriate hot water temperature within the set temperature value range is stored.

  If the hot water temperature in the pipe 8 does not converge within the range of ± 2 ° C. of the set temperature value even after continuing to discharge the hot water for a predetermined time (= specifically 5 minutes), the solenoid valve 20b is closed. , Hot water storage is stopped.

  Similar to the pipe 7a, the main temperature sensor 9b and the sub temperature sensor 10b are also provided at the same position of the pipe 8. For example, one of the sub temperature sensors 10b is broken due to “disconnection” or “short circuit”. Even in this state, the temperature of the hot water flowing through the pipe 8 can be detected by the other main temperature sensor 9b operating normally.

  Similarly to the piping 7a, when one of the temperature sensors, for example, a fault condition caused by "contact failure" or "rare short" of the sub temperature sensor 10b, either of the main / sub temperature sensors 9b and 10b is in a normal state. Since it is impossible for the control unit 31 to determine which temperature sensor is in an abnormal state, the control unit 31 identifies that both the temperature sensors 9b and 10b are in a failure state, and closes the solenoid valve 19. The hot water storage operation using the pipe 8 is stopped. Then, the information indicating that both the temperature sensors 9b and 10b are in a failure state is displayed on the sensor failure indicator 34.

  At the time of rapid hot water storage using both the pipe 7 and the pipe 8, a failure due to “bad contact” or “rare short” occurs in the temperature sensor interposed in the one pipe, and the control unit 31 operates to store hot water from the one pipe. Since the hot water storage operation using the other pipe is continued even if the hot water is stopped, the assistant is convenient because the hot water storage operation to the hot water storage tank 2 is not completely interrupted.

When the main and sub temperature sensors 9a and 10a do not detect abnormal hot water temperature during basic hot water storage, the hot water level stored in the hot water tank 2 is stored in the water level sensor 33b after a predetermined time has elapsed since the start of hot water storage. When it rises to the height position, the water level sensor 33b is activated, and the electromagnetic valve 18a is closed by the control unit 31 that has received the operation signal of the water level sensor 33b, the basic hot water storage is automatically stopped, and the hot water storage in the hot water storage tank 2 is performed. Is completed.
In addition, when neither the main temperature sensor 9a or 9b nor the sub temperature sensor 10a or 10b detects an abnormal hot water temperature during rapid hot water storage, the hot water level in the hot water tank 2 is the height of the water level sensor 33b. If it raises to a position, the solenoid valve 18a and the solenoid valve 19 will be closed by the control part 31, and rapid hot water storage will be stopped automatically.

As described above, under the condition where the first hot water temperature management mechanism 4 is operating normally, hot water having an abnormal hot water temperature is not stored in the hot water tank 2.
However, for example, the main temperature sensor 9a or the sub temperature sensor 10a detects that the hot water temperature flowing in the pipe 7a is an abnormal hot water temperature, and the controller 31 closes the electromagnetic valve 18a to stop the hot water storage operation. At this time, under a situation where the solenoid valve 18a is in a semi-failure state where the complete amount is not closed, there occurs a situation where hot water having an abnormal hot water temperature is stored in the hot water tank 2.

  During rapid hot water storage, the main temperature sensor 9b or the sub temperature sensor 10b detects that the hot water temperature flowing through the pipe 8 is an abnormal hot water temperature, and the controller 31 closes the solenoid valve 19 to operate the hot water storage. When the operation is stopped, even when the solenoid valve 19 is in a semi-failure state where the full amount is not closed, a hot water with an abnormal hot water temperature is stored in the hot water tank 2.

  Alternatively, when the main temperature sensor 9a and the sub temperature sensor 10a are simultaneously brought into a failure state due to “bad contact” or “rare short”, the difference value between the detected temperatures of the two temperature sensors 9a and 10a is approximately. Therefore, the control unit 31 cannot identify and display that both the temperature sensors 9a and 10a are in a failure state. At this time, if the hot water flowing in the pipe 7 reaches the abnormal hot water temperature, A situation occurs in which the hot water is stored in the hot water tank 2 as it is. The same situation as described above also occurs when the main temperature sensor 9b and the sub temperature sensor 10b are simultaneously brought into a failure state due to “contact failure” or “rare short”.

  However, even if a situation occurs in which hot water having an abnormal hot water temperature is stored in the hot water storage tank 2 due to the above various causes of failure, the second hot water temperature management mechanism 5 acts to The hot water stored in the hot water is quickly discharged out of the bathing device 11 and does not stay in the hot water tank 2. Hereinafter, the operation of the second hot water temperature management mechanism 5 will be described.

  When hot water having an abnormal hot water temperature is stored in the hot water storage tank 2 and the water level reaches the position of the temperature sensor 30, a signal related to the temperature value detected by the temperature sensor 30 is transmitted to the control unit 31. The detected temperature value is compared with the set temperature value, and the control unit 31 recognizes that the detected temperature value is out of the range of the set temperature value ± 2 ° C.

  At this time, the control unit 31 opens the motor valve 23a in the closed state (the motor valves 23c and 23d are in the opened state when the bathing apparatus 11 is turned on), and the hot and cold water with an abnormal hot water temperature is supplied. The hot water supply pipe 13a is passed through the hot water supply / discharge hot water pipe 26 and is naturally discharged out of the bathing apparatus 11.

  Next, the operation of the third hot water temperature management mechanism 6 will be described. In the third hot water temperature management mechanism 6, the first hot water temperature management mechanism 4 does not operate normally, abnormal hot water is stored in the hot water tank 2, and the temperature sensor 30 of the second hot water temperature management mechanism 5 is used. This is effective when the temperature value of abnormal hot water stored in the hot water storage tank 2 cannot be accurately detected. When the wheelchair 3 on which the bather is seated is inserted into the bathtub 1, the bathtub 1 and the backrest 25 of the wheelchair 3 are fixed by the fixing means, and the opening 35 of the bathtub 1 is closed by the backrest 25. Then, the motor valves 23a, 23d, and 23e are closed, and the motor valves 23b and 23c are opened.

  At this time, when an assistant presses a not-shown bathtub hot water switch provided on the operation panel 24 to start the initial hot water supply, the motor valve 23a is opened, and hot water with an abnormal hot water temperature passes through the hot water supply pipe 13 and the hot and cold hot water supply pipe 26. It is transferred into the bathtub 1 via.

  However, when the water level of the abnormal hot water reaches the position of the temperature sensor 29 fixed to the position below the side wall of the bathtub 1, the temperature sensor 29 detects the temperature value of the abnormal hot water, and the detection signal is Transmitted to the control unit 31, the control unit 31 closes the motor valve 24 a, and stops the transfer of the hot water from the hot water storage tank 2 to the bathtub 1. The fixing position of the temperature sensor 29 is set to a position that does not reach the body of the bather even when hot water with abnormal hot water is transferred into the bathtub 1. Even if it is transferred, the bather will not be injured by burns or the like due to the abnormally hot water transferred.

  The control unit 31 opens the motor valves 23d and 23e at the same time as stopping the transfer of the hot and cold water to the bathtub 1. As a result, the hot water having an abnormal hot temperature transferred into the bathtub 1 is discharged out of the bathing apparatus 11 from the hot water supply port 22 and the hot water supply / discharge port 27.

  When a predetermined amount of hot water within the set temperature range is stored in the hot water tank 2, when the hot water switch is pressed by the assistant and the initial hot water supply is started, the motor valve 23a is opened. The hot water in the hot water tank 2 is transferred into the bathtub 1 via the hot water supply pipe 13 and the hot water supply / discharge hot water pipe 26. The pump 12 does not operate until the water level sensor 32 b detects the water level of the hot water transferred into the bathtub 1. At the same time that the water level sensor 32b detects the hot water level, the motor valve 23c is closed and the operation of the pump 12 is started. By the operation of the pump 12, hot water is transferred from the hot water supply port 22 into the bathtub 1 through the hot water supply pipe 13. Is made. When hot water in the bathtub 1 reaches the set water level (the height position of any of the water level sensors 32c, 32d, and 32e), the motor valve 23a is closed by the control unit 31, the motor valve 23c is opened, and the pump 12 Is stopped, and the initial hot water supply to the bathtub 1 is completed.

  In this embodiment, a total of three hot water temperature management mechanisms, ie, a first hot water temperature management mechanism 4, a second hot water temperature management mechanism 5, and a third hot water temperature management mechanism 6 are provided in the bath 11. The example of performing the management control of the abnormal hot water temperature in triplicate has been described. Of the three hot water temperature management mechanisms, the first hot water temperature management mechanism 4 and the second hot water temperature management mechanism 5 or the first The hot water temperature management mechanism 4 and the third hot water temperature management mechanism 6, or the combination of the two hot water temperature management mechanisms 5, the second hot water temperature management mechanism 5 and the third hot water temperature management mechanism 6, Even if management control of abnormal hot water temperature is attempted, the effect of improving safety can be expected sufficiently.

  Moreover, although the present Example demonstrated the example of the bathing apparatus 11 which inserts the wheelchair 3 in the bathtub 1 in which the opening part 35 was formed in one side, and obstruct | occludes the opening part 35 with the backrest part 25, this The invention is not limited to the present embodiment, and can be applied to a bathing apparatus of a type in which, for example, a wheelchair seated by a bather is inserted into a bathtub with a door (not shown) to bathe.

  INDUSTRIAL APPLICABILITY The present invention can be applied to a bathing apparatus in which a wheelchair is inserted into a bathtub, hot water is transferred from the hot water tank into the bathtub, and the bather is used for bathing.

It is a piping system diagram concerning the bathing apparatus of Example 1. It is an external appearance perspective view which shows the bathing apparatus of the state before inserting a wheelchair in a bathtub. It is an external appearance perspective view which shows the bathing apparatus of the state after inserting a wheelchair in a bathtub. It is a block diagram which shows the electric constitution of a bathing apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bathtub 2 Hot water tank 3 Wheelchair 4 1st hot water temperature management mechanism 5 2nd hot water temperature management mechanism 6 3rd hot water temperature management mechanism 9 Main temperature sensor 10 Sub temperature sensor 11 Bathing device

Claims (4)

In the bathing apparatus which has the bathtub 1 and the hot water tank 2, inserts the wheelchair 3 in the bathtub 1, transfers hot water from the hot water tank 2 into the bathtub 1, and bathes a bather,
A first hot water temperature management mechanism 4 for detecting an abnormal hot water temperature flowing in the hot water storage pipe and controlling the hot water storage operation to the hot water tank 2;
A second hot water temperature management mechanism 5 for controlling the hot water of the abnormal hot water stored in the hot water tank 2;
A third hot water temperature management mechanism 6 that detects an abnormal hot water temperature in the bathtub 1 and controls the operation of transferring the hot water from the hot water tank 2 to the bathtub 1 ;
When the first hot water temperature management mechanism 4 detects that the hot water temperature flowing through the hot water storage pipe is abnormal, the first hot water temperature management mechanism 4 stops the hot water storage in the hot water tank 2 and discharges the hot water from the bathing device 11. A bathing device with a safety management mechanism.
The bath apparatus with a safety management mechanism according to claim 1, wherein a main temperature sensor (9) and a sub-temperature sensor (10) are provided in a hot water storage pipe.
The second hot water temperature management mechanism (5) discharges the hot water from the bathing device (11) when detecting that the hot water temperature in the hot water tank (2) is abnormal. Bathing device with safety management mechanism.
  When the third hot water temperature safety management mechanism 6 detects that the hot water temperature transferred into the bathtub 1 is abnormal, the third hot water temperature safety management mechanism 6 stops the transfer of hot water from the hot water tank 2 to the bathtub 1 or hot water. The bathing apparatus with a safety management mechanism according to claim 1, wherein hot water is discharged out of the bathing apparatus 11 after the transfer is stopped.

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