JP2001141253A - Storage type water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a storage type water heater that can use the hot water in a hot water storage tank without causing hot water to run out even in the case when a defective closure is caused to a shutoff valve for supplying/stopping mixed water. SOLUTION: In the case when a hot water flow amount sensor (Step S7) and a hot water temperature sensor (Step S12) detect the defective closure of a shutoff valve (Step S9) at the time when a hot water shutoff valve is closed (Step S6), a hot water mixture ratio regulating valve is controlled to be driven to a full-close position in a hot water side (Step S10), so the leakage of high-temperature water can be minimized so as to prevent the hot water in a hot water storage tank from running out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water storage type heating device provided with a hot water storage tank for heating and storing hot water.

[0002]

2. Description of the Related Art Conventionally, a hot water storage tank for heating and storing hot water, a high temperature hot water supply pipe for supplying high temperature water supplied from the hot water storage tank, and a bypass for supplying water by bypassing the hot water storage tank. A pipe, a mixing ratio adjusting valve provided at a junction of the high-temperature hot water supply pipe and the bypass pipe to adjust a mixing ratio of high-temperature water and water, and a supply / mixing of mixed water mixed by the mixing ratio adjusting valve.
There is a hot water storage type heating device provided with a shutoff valve for performing a stop. When the shutoff valve is opened, the mixed water mixed by the mixing ratio adjusting valve is supplied to a bathtub or the like.

[0003]

However, in the above-described conventional heating apparatus, when the shut-off valve for supplying / stopping the mixed water fails to close properly, the mixed water is continuously supplied to the bathtub or the like. There is a problem peculiar to the hot water storage type heating device that the hot water in the hot water storage tank is completely lost, that is, the hot water runs out and the hot water cannot be used thereafter.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to prevent the running out of hot water even when a shut-off valve for supplying / stopping mixed water has a poor closing. An object of the present invention is to provide a hot water storage type heating device that can use hot water in a hot water storage tank.

[0005]

In order to achieve the above object, according to the present invention, a hot water storage tank for heating and storing hot water and a high-temperature water supplied from the hot water storage tank are supplied. Hot water supply pipe, a bypass pipe for bypassing the hot water storage tank and supplying water, and a mixing ratio adjustment provided at a junction of the hot water supply pipe and the bypass pipe to adjust a mixing ratio of hot water and water. A hot water storage device comprising: a valve; a shutoff valve for supplying / stopping the mixed water mixed by the mixing ratio adjusting valve; and a control unit for controlling the opening of the mixing ratio adjusting valve and the opening and closing of the shutoff valve. In the heating device, a detecting means for detecting the closing failure of the shut-off valve,
When the detecting means detects the poor closing of the shutoff valve, the control unit controls the opening of the mixing ratio adjusting valve so that the amount of high-temperature water passing therethrough is minimized. Therefore, when the shut-off valve fails to close properly, the amount of high-temperature water passing through the mixing ratio adjustment valve is minimized, so that the hot water in the hot water storage tank does not continue to be supplied to the bathtub, etc. It is possible to prevent the hot water from running out, that is, to run out of hot water, and it is also possible to supply hot water from the hot water storage tank to another hot water supply pipe for use.

According to a second aspect of the present invention, a hot water storage tank for heating and storing hot water, a high temperature hot water supply pipe for supplying high temperature water supplied from the hot water storage tank, and a hot water supply pipe for bypassing the hot water storage tank to supply water. A mixing pipe for adjusting the mixing ratio of high-temperature water and water, provided at a junction of the high-temperature hot water supply pipe and the bypass pipe, and supplying / stopping the mixed water mixed by the mixing ratio adjusting valve. And a control unit for controlling the opening of the mixing ratio adjusting valve and the opening and closing of the shut-off valve, the hot-water storage type heating device comprising a detecting means for detecting a poor closing of the shut-off valve. When the detecting means detects the poor closing of the shut-off valve, the control unit controls the opening of the mixing ratio adjusting valve so as to reduce the amount of high-temperature water passing therethrough. Therefore, when the shut-off valve is not properly closed, the amount of high-temperature water passing through the mixing ratio adjusting valve is reduced, so that the supply amount of hot water in the hot water storage tank to the bathtub or the like is reduced, and the hot water in the hot water storage tank is reduced. It is possible to secure a time allowance until all the hot water runs out, that is, a so-called out-of-water state. Until the hot water runs out, hot water can be supplied from the hot water storage tank to another hot water supply pipe and used.

In claim 3, claim 1 or claim 2
In the hot water storage type heating device according to the above, after being controlled by the control unit to close the shutoff valve, when the water amount sensor that detects the flow rate of the mixed water mixed by the mixing ratio adjustment valve detects the water flow, Alternatively, when the detection value of the mixed water temperature sensor that detects the temperature of the mixed water mixed by the mixing ratio adjustment valve exceeds a predetermined value, it is determined that the shutoff valve is not properly closed and the detection unit is provided. It was decided to. Therefore, even though the shut-off valve is controlled to close, the water flow sensor detects the water flow,
When the detection value of the mixed water temperature sensor exceeds a predetermined value (for example, a hot water set temperature), it is determined that the shut-off valve is not properly closed. Therefore, it is possible to reliably detect the shut-off failure of the shut-off valve. . Upon detection of the closing failure, only one of the water amount sensor and the mixed water temperature sensor may be provided and controlled based on the detection value thereof, or may be controlled based on the detection values of both sensors.

According to a fourth aspect of the present invention, in the hot water storage type heating device according to any one of the first to third aspects, when the detecting means detects a poor closing of the shutoff valve, the occurrence of an abnormality is notified. Therefore, since the user can know the closing failure of the shut-off valve, it is possible to promptly take measures such as requesting repair without performing hot water operation thereafter.

According to a fifth aspect of the present invention, a hot water storage tank for heating and storing hot water, a high temperature hot water supply pipe for supplying high temperature water supplied from the hot water storage tank, and a hot water supply pipe for bypassing the hot water storage tank to supply water. A mixing pipe for adjusting the mixing ratio of high-temperature water and water, provided at a junction of the high-temperature hot water supply pipe and the bypass pipe, and supplying / stopping the mixed water mixed by the mixing ratio adjusting valve. And a control unit for controlling the opening of the mixing ratio adjusting valve and the opening and closing of the shut-off valve, wherein the control unit is controlled to close the shut-off valve. In such a case, the control unit controls the opening of the mixing ratio adjusting valve so that the amount of high-temperature water passing therethrough is minimized.
Therefore, when the shut-off valve is closed, the amount of high-temperature water passing through the mixing ratio adjusting valve is always minimized, so that hot water in the hot-water storage tank continues to be supplied to the bathtub or the like even when the shut-off valve is not properly closed. Therefore, it is possible to prevent the hot water in the hot water storage tank from being completely depleted, that is, to run out of hot water, and to supply hot water from the hot water storage tank to another hot water supply pipe for use.

According to a sixth aspect of the present invention, a hot water storage tank for heating and storing hot water, a high temperature hot water supply pipe for supplying high temperature water supplied from the hot water storage tank, and a hot water supply pipe for bypassing the hot water storage tank to supply water. A mixing pipe for adjusting the mixing ratio of high-temperature water and water, provided at a junction of the high-temperature hot water supply pipe and the bypass pipe, and supplying / stopping the mixed water mixed by the mixing ratio adjusting valve. And a control unit for controlling the opening of the mixing ratio adjusting valve and the opening and closing of the shut-off valve, wherein the control unit is controlled to close the shut-off valve. In such a case, the control unit controls the opening of the mixing ratio adjusting valve so as to reduce the amount of high-temperature water passing therethrough. Therefore, when the shut-off valve is closed, the amount of high-temperature water passing through the mixing ratio adjustment valve is reduced, so that even if the shut-off valve is not properly closed, the supply amount of hot water in the hot water storage tank to the bath tub or the like is reduced. As a result, it is possible to secure a time allowance until all the hot water in the hot water storage tank runs out, that is, a so-called hot water exhaustion state. Until the hot water runs out, hot water can be supplied from the hot water storage tank to another hot water supply pipe and used.

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a configuration diagram in which a heating device 100 according to one embodiment of the present invention is applied to an electric water heater.

The water from the water supply source is depressurized by the pressure reducing valve 1, and is branched into a water supply pipe 2 and a bypass pipe 3 downstream of the pressure reducing valve 1. The bypass pipe 3 communicates with a downstream hot water mixing ratio adjusting valve 46A via a water supply check valve 23A, and a water supply temperature sensor 41 for detecting a water supply temperature, and a negative pressure when a negative pressure is generated in the pipe such as when water is cut off. A vacuum breaker 51 for canceling the pressure is provided. The water supply pipe 2 communicates with a heating unit 31. The heating unit 31 includes a hot water storage tank 32 and a lower heater 3.
3. An upper heater 34 is provided. The water in the hot water storage tank 32 is heated by the lower heater 33 and the upper heater 34 such that the detection temperatures of the tank lower temperature sensor 37 and the tank upper temperature sensor 38 become high (for example, 85 ° C.). The high-temperature hot-water supply pipe 4 from the upper part of the hot-water storage tank 32 communicates with the hot-water mixing ratio adjusting valve 46A via the high-temperature water check valve 22A. Further, a drain valve 36 is provided below the hot water storage tank 32. Further, a safety valve 35 for releasing expansion water generated when the water in the hot water tank 32 is heated is provided at an upper portion of the hot water storage tank 32.

In the hot water mixing ratio adjusting valve 46A driven by the stepping motor, the water from the bypass pipe 3 and the high-temperature water from the high-temperature hot water pipe 4 are mixed, and hot water of an appropriate temperature is supplied to the hot-water pipe 8
A. The hot water supply pipe 8A is provided with a hot water supply temperature sensor 43A for detecting a hot water supply temperature and a hot water supply flow rate sensor 44 for detecting a flow rate of hot water supplied to the hot water supply pipe 8A. Further, the high-temperature hot water supply pipe 4 is provided with a high-temperature water temperature sensor 42 for detecting the temperature of the high-temperature hot water supplied from the heating unit 31.

The high-temperature hot water supply pipe 4 communicates with the downstream high-temperature hot water supply pipe 5 and a hot-water mixing ratio adjusting valve 46B via a high-temperature water check valve 22. On the other hand, the bypass pipe 3 branches off downstream of the vacuum breaker 51, and the bypass pipe 7 and the water supply check valve 2
Through 3, it communicates with the hot water mixing ratio adjusting valve 46 </ b> B.

The hot water mixing ratio adjusting valve 46B driven by the stepping motor mixes the water from the bypass pipe 7 and the high-temperature water from the high-temperature hot-water supply pipe 5 so that any one of high-temperature water, water, and hot water of the appropriate temperature is added. It is supplied to the beam hot water supply pipe 9. The hot water supply pipe 9 has a hot water shutoff valve 21 for supplying / stopping high-temperature water, water, and hot water to the bathtub 62 in accordance with a switch operation of the remote controller 71, and a hot water temperature for detecting the hot water temperature. A hot water temperature sensor 43B, a hot water flow sensor 45 for detecting the flow rate of hot water supplied to the hot water supply pipe 9, and hot water check valves 52 and 53 are provided. The hot water supply pipe 9 further communicates with an adapter 61 attached to the wall surface of the bathtub 62.

Here, the water supply check valve 23A and the high-temperature water check valve 22A allow the water in the bypass pipe 3 to flow into the high-temperature hot water supply pipe 4, and conversely, the high-temperature water in the high-temperature hot water supply pipe 4 to the bypass pipe 3. Prevents inflow. The water supply check valve 23 and the high-temperature water check valve 22 prevent the water in the bypass pipe 7 from flowing into the high-temperature hot water supply pipe 5 and, conversely, the high-temperature water in the high-temperature hot water supply pipe 5 from flowing into the bypass pipe 7. Preventing.

Further, the heating device 100 includes a tank lower temperature sensor 37, a tank upper temperature sensor 38, a feed water temperature sensor 41, a hot water temperature sensor 42, a hot water temperature sensor 43A, a hot water flow sensor 44, a hot water temperature sensor 43B, and a hot water temperature sensor 43B. Based on a detection signal from the beam flow sensor 45 and the like and an instruction from the remote controller 71, the lower heater 3
3, a main body control unit 70 for controlling the upper heater 34, the hot water mixing ratio adjusting valve 46A, the hot water mixing ratio adjusting valve 46B, the hot water shutoff valve 21, and the like.

The remote controller 71 has a hot water supply temperature setting switch 85 for setting a set temperature Ts of hot water supplied from the hot water supply pipe 8A, a hot water temperature setting switch 86 for setting a set temperature Tfs of hot water to be poured into the bathtub 62, A hot water amount setting switch 87 for setting the amount of hot water to be supplied to the bathtub 62, a hot water switch 82 for turning on when filling the bathtub 62, and a high-temperature hot water supply for turning on when supplying high-temperature water into the bathtub 62 A switch 83, a water supply switch 84 which is turned on when water is supplied into the bathtub 62, a display unit 81 which displays characters such as a hot water supply set temperature Ts, a hot water set temperature Tfs, and operation information of a heating device, and heating by voice. A speaker 88 for notifying the operation information of the device is provided. Further, the remote controller 71 and the main body control unit 70 are connected by a communication line 72 and mutually communicate operation instruction information and operation information.

FIG. 2 is a structural view of the hot water supply mixing ratio adjusting valve 46A (or the hot water mixing ratio adjusting valve 46B) according to the present invention. The hot water supply mixing ratio adjusting valve 46A (or the hot water mixing ratio adjusting valve 46B) includes the stepping motor 201, the body 2
02, a valve body 203, a seal portion 205, and a bearing 204. The valve 203 is a stepping motor 2
01 is driven to rotate to adjust the mixing ratio of hot and cold water.
Rotating clockwise (hot water side closing direction) increases the amount of water supply and decreasing the amount of high-temperature water. Conversely, rotating counterclockwise (water side closing direction) decreases the amount of water supply and increasing the amount of high-temperature water.

FIG. 3 is a diagram showing the relationship between the hot water mixing ratio R of the hot water supply mixing ratio adjusting valve 46A (or the hot water mixing ratio adjusting valve 46B) and the rotation angle θ of the valve element 203 according to the present invention. Here, the mixing ratio R indicates the ratio (Qh / Q) between the amount of hot water (Qh) flowing into the mixing ratio adjusting valve and the total amount (Q) of hot water and water. The valve element 203 is rotationally driven by the stepping motor 201, and the mixing ratio R is 1.0 at the water side fully closed position (θ = 0 deg), and 0.0 at the hot water side fully closed position (θ = 150 deg). Has become.

The hot water supply mixture ratio adjusting valve 46A is arranged so that the hot water supply set temperature Ts and the hot water supply temperature Tm (the temperature detected by the hot water supply temperature sensor 43A) coincide with each other when the hot water supply flow rate sensor 44 detects the water flow as follows. Perform temperature control. First, the target rotation angle θt is calculated by equation (1). θt = f {Rt} Expression (1) In Expression (1), Rt is a target mixture ratio, and f {Rt} is a valve body 203 for the mixture ratio R shown in FIG.
Shows a function for calculating the target rotation angle θt based on the relationship with the rotation angle θ. The relationship of the rotation angle θ of the valve element 203 with respect to the mixture ratio R is stored in advance in a memory such as a ROM as a conversion table, and when the target mixture ratio Rt is determined, the target rotation angle θt is set and the target rotation angle θt is set. Based on this, the stepping motor is driven to drive the valve element 203 of the mixing ratio adjusting valve.

The target mixture ratio Rt is calculated by the following equation (2). Rt = Rff + Rfb Expression (2) where Rff is a feedforward amount, and Expression (3)
Is calculated by Rff = Qh / Q = (Ts−Tc) / (Th−Tc) Equation (3) where Ts is a hot water supply set temperature, Tc is a supply water temperature (= detection temperature of the supply water temperature sensor 41), and Th is high temperature water. This is the temperature (the temperature detected by the high-temperature water temperature sensor 42). Further, Rfb is a feedback amount, and is calculated from the difference between the hot water supply set temperature Ts and the hot water supply temperature Tm (the temperature detected by the hot water supply temperature sensor 43A) by equation (4). Rfb = fpid {K × (Ts−Tm)} (4) Here, the fpid function is a function for performing a feedback operation, and makes the hot water supply temperature Tm equal to the hot water supply set temperature Ts by proportional, integral, and differential operations. Feedback amount is calculated. Further, the constant K is a feedback gain.

The hot-water mixing ratio adjusting valve 46B operates so that the hot-water setting temperature Tfs and the hot-water temperature Tf (the temperature detected by the hot-water temperature sensor 43B) match when the hot water flow rate sensor 45 detects the water flow. And the feedforward amount Rff is calculated by equation (5). Rff = Qh / Q = (Tfs−Tc) / (Th−Tc) (Equation (5)) The feedback amount Rfb is calculated by the equation (6) to set the hot water temperature Tfs and the hot water temperature Tf (hot water temperature sensor 43B).
Calculated from the detected temperature). Rfb = fpid {K × (Tfs−Tf)} Equation (6)

FIG. 4 is a first control flow in one embodiment of the present invention. First, it is confirmed whether or not the hot water switch 82 of the remote controller 71 is turned on (step S).
1) When the hot water switch 82 is turned on, the hot water cutoff valve 21 is opened (step S2), and the hot water mixing ratio adjusting valve 4 is opened.
The temperature of 6B is controlled (step S3). Next, the integrated amount of hot water detected by the hot water flow rate sensor 45 is compared with the set amount of hot water set by the hot water amount setting switch 87 of the remote controller 71 (step S4). When the beam setting amount is exceeded, control is performed so that the hot-water shutoff valve 21 is closed (step S6). If the integrated amount of hot water does not exceed the set amount of hot water in step S4, it is checked whether the hot water switch 82 has been turned off (step S5). If the hot water switch 82 has not been turned off, the process proceeds to step S5. Move to S3. If the hot water switch 82 is OFF, the process proceeds to step S6, and the hot water cutoff valve 21 is controlled to be closed.

Next, it is confirmed whether the flow rate detected by the hot water flow rate sensor 45 is 0 l / min (step S).
7). If the state in which the flow rate detected by the hot water flow rate sensor 45 is not 0 l / min continues for 10 seconds (step S8), it is determined that the hot water shutoff valve 21 is not properly closed (step S9), and the hot water mixing ratio adjusting valve 46B is turned on. Side fully closed position (θ = 150d
eg) (step S10). Here, by setting the hot water mixing ratio adjusting valve 46B to the hot water side fully closed position, the amount of high-temperature water leakage can be minimized, and the hot water storage tank 32 can be prevented from running out of hot water. Step S10
In the above description, the hot water mixing ratio adjustment valve 46B is driven to the hot water side fully closed position, but control may be performed to reduce the hot water side flow rate.

In step S7, the hot water flow rate sensor 45
If the detected flow rate is 0 l / min, after 10 minutes have passed (step S11), the hot water temperature sensor 43B
Is detected by the hot water temperature setting switch 8 of the remote controller 71.
It is confirmed whether the temperature is lower than the hot water set temperature Tfs set by step 6 by 5 ° C. or more (step S1).
2). If the temperature drops by 5 ° C. or more, the hot water shutoff valve 21
Is normal, this control flow ends. If the temperature is not lower than the hot water set temperature Tfs by 5 ° C. or more, after 10 minutes (step S13), it is determined that the hot water shutoff valve 21 is not properly closed (step S9).

The reason why the closing failure of the hot water shutoff valve 21 is determined based on the temperature detected by the hot water temperature sensor 43B is as follows. Generally, it is difficult for the flow rate sensor to detect a minute flow rate, and in the case of the hot water flow rate sensor 45 of this embodiment, an impeller type flow rate sensor is used, and the minute flow rate of 0.5 l / min or less is used. Cannot be detected (0.5 l / min or less is determined to be 0 l / min). Therefore, when a minute leak that cannot be detected by the hot water flow rate sensor 45 occurs, the closing failure of the hot water shutoff valve 21 is determined based on the temperature detected by the hot water temperature sensor 43B. When the hot water cutoff valve 21 is completely closed, the temperature detected by the hot water temperature sensor 43B gradually decreases due to heat radiation, but when a slight leak occurs, hot water at the hot water set temperature is supplied. This is based on the fact that the temperature detected by the hot water temperature sensor 43B will also be close to the hot water set temperature Tfs.

In step S9, if it is determined that the closing of the hot water cutoff valve 21 is defective, the remote controller 71 informs the user of the content of the abnormality or the abnormality code. As a result, the user can promptly take measures such as requesting repair without performing subsequent hot water operation. Further, a process for prohibiting the subsequent hot water operation may be performed.

If the telephone number of the contact and the name of the repair company of the contact are also reported at the same time when the contents of the abnormality and the code of the abnormality are reported, the user can make a request for repair smoothly. Further, the telephone number of the contact and the name of the repair company of the contact can be rewritten by operating a switch of the remote controller 71, and the rewritten content is written in an EEPROM (non-volatile memory) provided in the remote controller 71 or the main body controller 70. If so, individual measures can be taken.

FIG. 5 shows a second control flow according to the embodiment of the present invention. First, it is confirmed whether or not the hot water switch 82 of the remote controller 71 is turned on (step S).
1) When the hot water switch 82 is turned on, the hot water cutoff valve 21 is opened (step S2), and the hot water mixing ratio adjusting valve 4 is opened.
The temperature of 6B is controlled (step S3). Next, the integrated amount of hot water detected by the hot water flow rate sensor 45 is compared with the set amount of hot water set by the hot water amount setting switch 87 of the remote controller 71 (step S4). When the beam setting amount is exceeded, control is performed so that the hot-water shutoff valve 21 is closed (step S6). If the integrated amount of hot water does not exceed the set amount of hot water in step S4, it is checked whether the hot water switch 82 has been turned off (step S5). If the hot water switch 82 has not been turned off, the process proceeds to step S5. Move to S3. If the hot water switch 82 is OFF, the process proceeds to step S6, in which the hot water shutoff valve 21 is controlled to be closed, and the hot water mixing ratio adjusting valve 46B is driven to the hot water side fully closed position (θ = 150 deg). (Step S10). Here, the hot water mixing ratio adjusting valve 46
By setting B to the hot water side fully closed position, even if the hot water shutoff valve 21 is not properly closed, the amount of high-temperature water leakage can be minimized, and the hot water storage tank 32 can be prevented from running out of hot water. . In step S10, the hot water mixing ratio adjusting valve 4
Although 6B is driven to the hot water side fully closed position, it may be controlled to reduce the hot water side flow rate.

[Brief description of the drawings]

FIG. 1 shows a heating device 100 according to an embodiment of the present invention.
Diagram of the application of the water heater to an electric water heater

FIG. 2 is a structural view of a hot water supply mixture ratio adjusting valve 46A (or a hot water mixture ratio adjusting valve 46B) according to the present invention.

FIG. 3 is a diagram showing a relationship between a mixing ratio R of hot water and a rotation angle θ of a valve body 203 of a hot water supply mixing ratio adjusting valve 46A (or a hot water mixing ratio adjusting valve 46B) according to the present invention.

FIG. 4 is a first control flow according to an embodiment of the present invention.

FIG. 5 is a second control flow according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Pressure reducing valve 2 ... Water supply pipe 3 ... Bypass pipe 4 ... Hot water supply pipe 5 ... Hot water supply pipe 7 ... Bypass pipe 8A ... Hot water supply pipe 9 ... Hot water supply water supply pipe 21 ... Hot water shutoff valve 22 ... High temperature water check valve 22A ... high temperature water check valve 23 ... water supply check valve 23A ... water supply check valve 31 ... heating unit 32 ... hot water storage tank 33 ... lower heater 34 ... upper heater 35 ... safety valve 36 ... drain valve 37 ... tank lower temperature sensor 38 ... tank Upper temperature sensor 41: Hot water temperature sensor 42: Hot water temperature sensor 43A: Hot water temperature sensor 43B: Hot water temperature sensor 44: Hot water flow rate sensor 45: Hot water flow rate sensor 46A: Hot water mixing ratio adjusting valve 46B: Hot water mixing ratio adjustment Valve 51 Vacuum breaker 52 Hot water check valve 53 Hot water check valve 61 Adapter 62 Bathtub 70 Body control unit 71 Remote controller 72 Communication line 81 Display unit 82 Hot water switch 83 Hot water switch 84 Hot water switch 85 Hot water temperature setting switch 86 Hot water temperature setting switch 87 Hot water setting switch 88 Speaker 100 Heating device 201 Stepping motor 202 Body 203 Valve body 204 Bearing 205 Seal part

Claims (6)

[Claims] 1. A hot water storage tank for heating water to store hot water,
A hot water supply pipe for supplying high-temperature water supplied from the hot water storage tank, a bypass pipe for bypassing the hot water storage tank and supplying water, and a high-temperature hot water supply pipe provided at a junction of the high-temperature hot water supply pipe and the bypass pipe. A mixing ratio adjusting valve for adjusting the mixing ratio of water and water, a shutoff valve for supplying / stopping the mixed water mixed by the mixing ratio adjusting valve, an opening of the mixing ratio adjusting valve, and the shutoff valve A control unit for controlling the opening and closing of the hot water storage type heating device, comprising a detecting means for detecting a poor closing of the shut-off valve, and passing when the detecting means detects a poor closing of the shut-off valve A hot-water storage type heating device, wherein an opening degree of the mixing ratio adjusting valve is controlled by the control unit so that an amount of high-temperature water is minimized. 2. A hot water storage tank for heating and storing hot water,
A hot water supply pipe for supplying high-temperature water supplied from the hot water storage tank, a bypass pipe for bypassing the hot water storage tank and supplying water, and a high-temperature hot water supply pipe provided at a junction of the high-temperature hot water supply pipe and the bypass pipe. A mixing ratio adjusting valve for adjusting the mixing ratio of water and water, a shutoff valve for supplying / stopping the mixed water mixed by the mixing ratio adjusting valve, an opening of the mixing ratio adjusting valve, and the shutoff valve A control unit for controlling the opening and closing of the hot water storage type heating device, comprising a detecting means for detecting a poor closing of the shut-off valve, and passing when the detecting means detects a poor closing of the shut-off valve A hot-water storage type heating device, wherein an opening degree of the mixing ratio adjusting valve is controlled by the control unit so as to reduce an amount of high-temperature water. 3. A water flow sensor for detecting a flow rate of the mixed water mixed by the mixing ratio adjusting valve after controlling the shutoff valve to be closed by the control unit, or When the detected value of the mixed water temperature sensor that detects the temperature of the mixed water mixed by the ratio adjustment valve exceeds a predetermined value, the detection means is configured to determine that the shut-off valve is not properly closed. The hot water storage type heating device according to claim 1 or 2, wherein 4. The hot water storage type heating apparatus according to claim 1, wherein when the detecting means detects a poor closing of the shutoff valve, the occurrence of the abnormality is notified. 5. A hot water storage tank for heating and storing hot water,
A hot water supply pipe for supplying high-temperature water supplied from the hot water storage tank, a bypass pipe for bypassing the hot water storage tank and supplying water, and a high-temperature hot water supply pipe provided at a junction of the high-temperature hot water supply pipe and the bypass pipe. A mixing ratio adjusting valve for adjusting the mixing ratio of water and water, a shutoff valve for supplying / stopping the mixed water mixed by the mixing ratio adjusting valve, an opening of the mixing ratio adjusting valve, and the shutoff valve And a control unit for controlling the opening and closing of the hot water storage type heating device, wherein when the control unit is controlled to close the shutoff valve, the mixing ratio is controlled so that the amount of high-temperature water passing therethrough is minimized. A hot-water storage type heating device wherein the opening degree of a regulating valve is controlled by the control unit. 6. A hot water storage tank for heating and storing hot water,
A hot water supply pipe for supplying high-temperature water supplied from the hot water storage tank, a bypass pipe for bypassing the hot water storage tank and supplying water, and a high-temperature hot water supply pipe provided at a junction of the high-temperature hot water supply pipe and the bypass pipe. A mixing ratio adjusting valve for adjusting the mixing ratio of water and water, a shutoff valve for supplying / stopping the mixed water mixed by the mixing ratio adjusting valve, an opening of the mixing ratio adjusting valve, and the shutoff valve And a control unit for controlling the opening and closing of the hot water storage type heating device, wherein when the control unit is controlled to close the shut-off valve, the mixing ratio adjusting valve is configured to reduce the amount of high-temperature water passing therethrough. A hot water storage type heating device, characterized in that the opening degree of the hot water is controlled by the control unit.