JPH06174305A - Water supply / drainage device for hot water storage type water heater - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent water from leaving or using residual water when the water supply / drainage system of a water heater is abnormal, and to enable manual use. [Structure] Abnormality detection means 16, 17, 18, 19 for detecting abnormality of the motor-operated valves 3, 5, 6, 9, and the detection means 16
Abnormality detection invalidation setting means 20, 21, 22, 23 for invalidating the abnormality of all the valves or the respective valves detected by
And a forcible closing means 24 for forcibly closing the motor-operated valves 3, 5, 6, 9 and the abnormality detecting means 16 to 19 detect an abnormality of the motor-operated valves 3, 5, 6, 9. When the abnormality detection invalidity setting means 16 to 19 do not input the abnormality detection invalidity, the forced closing means 24 closes all the motor-operated valves 3, 5, 6, 9 to set the abnormality detection invalidity. Means 2
When the invalidity detection is input from 0 to 23, the controller 8 that does not drive the forced closing means 24 is provided, and the electrically operated valve having the abnormality is manually or forcibly operated as necessary.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water supply / drainage device for a hot water storage type water heater used in resort apartments and the like.

[0002]

2. Description of the Related Art In recent years, interest in resorts has increased due to an increase in leisure time and changes in people's consciousness of life. The housing situation in the resort area is changing from a traditional cottage by house to an apartment house such as a resort condominium in terms of price, management, and enhancement of facilities. Most of the actual usage of such resort condominiums is long-term absence of users and irregular use. Therefore, from a safety perspective, the hot water heater of each house can be centrally controlled from the manager's room, or can be accessed remotely using a telephone line. The operation (tele-control) has come to be performed. Electric water heaters are mainly used in such resort condominiums because they are easy to use, do not require refueling, are safe because the heat source is electricity, are easy to manage, etc. The face is raised.

The electric water heater is a water storage type hot water supply apparatus in which water is stored in a tank having a capacity of 150 to 460 liters and is heated by an electric heater. When supplying water, consider the water supply after not using it for a long time, and clean the hot water storage tank. Also, if you leave water in the hot water tank during a period when you do not use the electric water heater due to a long absence, such as a resort condominium, the water may deteriorate, and there is a risk of freezing in cold regions, etc. It is necessary to drain the water in the hot water storage tank. When draining water, consider the effect on the drainage pipe of the condominium and drain it after the hot water in the hot water storage tank is cooled.

FIG. 2 is a block diagram of a water supply / drainage device for a water heater of a resort condominium. Reference numeral 1 denotes a hot water storage tank that stores water supplied from a water supply source. 2 is a curran, which is a faucet when the user uses water (hot water) adjusted to an appropriate temperature. Three
Is a water supply motor-operated valve provided in a water supply pipe for supplying water from a water supply source, and the side (2) not connected to the water supply source of the hot water supply motor-operated valve 3.
It is branched into two pipes, a hot water supply pipe for supplying water from the secondary side) to the hot water storage tank 1 and a secondary water supply pipe for supplying water to the calan 2. 4-1 is a first check valve, which connects the hot water supply pipe to the hot water storage tank 1
The water supplied to the hot water storage tank 1 is prevented from flowing back to the Karan 2 through the water supply source, the water supply pipe, and the secondary water supply pipe. 10-1 is a water supply flow rate sensor 1 provided in the water supply pipe
Then, the flow rate of the water supplied from the water supply source to the hot water storage tank 1 through the water supply pipe is detected. Water supply to the hot water storage tank 1 is a water supply source → water supply motor operated valve 3 → water supply pipe → water supply flow rate sensor 1
0-1 → first check valve → air in the hot water storage tank 1 is carried out from the water supply port in the hot water storage tank 1 by the air vent valve 11 provided in the hot water supply pipe connected to the hot water supply port of the hot water storage tank 1. Is pulled out. The water supplied to the hot water storage tank 1 is the heater 1
It is heated by 2 and becomes warm water. The hot water heated in the hot water storage tank 1 is supplied from the hot water supply pipe to the hot water supply motor operated valve 5 provided in the hot water supply pipe.
It is connected to Karan 2 through the
The water supplied from the next water supply pipe is mixed so as to have an appropriate temperature and discharged from the Karan 2.

Reference numeral 4-2 is a second check valve provided on the drain pipe connected to the hot water supply pipe. Further, 4-3 is a third check valve provided in the water drain pipe provided in the secondary water supply pipe. The second check valve 4-2 is from the water supply source to the hot water supply pipe through the drain pipe, and the third check valve 4-3 is the water to the secondary water supply pipe through the drain pipe. Backflow is prevented and water is prevented from flowing into the hot water supply pipe from the water supply pipe through the water drain pipe when the water supply motor operated valve 3 is opened.

Reference numeral 6 is a drainage electric valve provided on a water distribution pipe connected to the drainage port of the hot water storage tank 1. Reference numeral 9 denotes a water draining motor valve provided on the water draining pipe in which the water draining pipe connected to the hot water supply pipe and the water draining pipe connected to the secondary water supply pipe are combined into one. Further, a water supply pipe that connects the water supply flow rate sensor 10-1 and the first check valve 4-1 is also connected to the drain pipe connected to one pipe.

Reference numeral 7 is installed in a manager's room or the like, and a user gives a water supply (hot water supply) / drainage instruction to the control device 8 by communication.
The control device 8 gives instructions such as opening / closing instructions of the water supply electric valve 3, the hot water supply electric valve 5, the drainage electric valve 6, and the water draining electric valve 9.

Reference numeral 16 is a water supply electric valve abnormality detecting means for detecting an abnormality of the water supply electric valve. Reference numeral 17 denotes hot water supply electric valve abnormality detection means for detecting abnormality of the hot water supply electric valve. Reference numeral 18 is a drainage electric valve abnormality detecting means for detecting abnormality of the drainage electric valve. 1
Reference numeral 9 denotes a water drain motor-operated valve abnormality detecting means for detecting abnormality of the water drain motor-operated valve. Reference numeral 24 is a forced closing means that closes all the motor-operated valves when an abnormality is detected in each motor-operated valve.

FIG. 3 shows an external view of the centralized control panel 7. Thirteen
Is a power supply display means for displaying power ON / OFF of the centralized control panel 7. When the power supply display means 13 is lit,
It shows that the central control board 7 is electrically connected to the water heater for each house. Reference numeral 14 is a door-by-door water heater usage status display means for displaying the usage status of the water heater installed in each door. When the door-to-door water heater usage status display means 14 is lit, it means that the water heater is being used in the displayed house. Reference numeral 15 is a door-by-door water heater ON / OFF switching means for instructing water supply / drainage to the water heater installed in each door. Door-to-door water heater ON / OFF switching means 15 corresponding to the water heater of the user's house when the user makes a contact for visiting the resort condominium (hereinafter referred to as "Kiso")
Instruct the water heater to supply water. Also, when the user informs him / her of returning home, the water heater ON / OFF switching means 15 for each door instructs the water heater to drain water. That is, the manager can issue a water supply / drainage instruction to the water heater of each door by operating the door-to-door water heater ON / OFF switching means 15.

Hereinafter, description will be made based on actual use in a resort condominium. When the user informs the manager about the visit, the manager uses the centralized control panel 7 to turn on / off the individual water heater of the centralized control panel 7 in the electric water heater corresponding to the room owned by the user. A hot water supply instruction is given by operating the OFF switching means.

When the controller 8 receives a hot water supply instruction from the centralized control panel 7, the water supply motor-operated valve 3 and the drainage motor-operated valve 6 are opened for a certain period of time to clean the hot water storage tank 1. When the cleaning of the inside of the hot water storage tank 1 is completed, the control device 8 closes the drainage motor-operated valve, and the water supply motor-operated valve remains open, so that the water supply to the hot water storage tank 1 is started. The water supply flow rate sensor 10-1 detects the water supply flow rate, and the preset amount of water that can be stored in the hot water storage tank 1 and the flow rate and the water supplied from the water supply source through the water supply pipe are supplied. Whether the hot water storage tank 1 is full or not is determined from the time when the hot water is stored.

When the hot water storage tank 1 becomes full, the heater 12
At, the water in the hot water storage tank 1 is heated to warm water. When the user uses the hot water in the hot water storage tank 1, the controller 8 opens the hot water supply electric valve 5 when the hot water supply switch (not shown) of the hot water heater panel (not shown) in the resort condominium is operated. Then, the hot water in the hot water storage tank 1 is supplied in the route of the hot water supply port in the hot water storage tank 1 → the hot water supply motor-operated valve 5 → the hot water supply pipe → the currant 2. In addition, water is supplied from the water supply source through the path of the motor-operated water supply valve 3-> secondary water supply pipe-> Karan 2 and is mixed with the hot water supplied by the Karan 2.

When the user returns home and operates a water draining switch (not shown) of a hot water heater panel (not shown) in the resort condominium, the control device 8 closes the water supply motor-operated valve 3 to supply hot water. The valve 5 is opened, and the water drain motor-operated valve 9 is opened. At this time, the drainage motor-operated valve 6 remains closed. Since the water in the water supply pipe is connected to the water drain pipe, it is drained by the water drain motor-operated valve 9. Further, the water in the secondary water supply pipe is drained from the water drain motor-operated valve 9 through the water drain pipe connected to the secondary water supply pipe. Further, the hot water in the hot water supply pipe is drained from the water drain motor-operated valve 9 through the water drain pipe which is also connected to the hot water supply pipe. This will drain all the water in the pipe.

The water in the secondary water supply pipe on the upper part of the caran 2 and the hot water supply pipe in FIG. 1 can be drained by the user opening the caran 2. (These draining operations are called draining operations. The state of each motorized valve during the draining operation is
The water supply electric valve 3 is closed, the hot water supply electric valve 5 is opened, the drainage electric valve 6 is closed, and the water draining electric valve 9 is opened. ) The water draining operation ends after 1 hour, and all electric valves are closed. By closing the water drain motor valve 9, the invasion of insects from the water drain pipe is prevented.

The hot water in the hot water storage tank 1 is hot (about 85 ° C.)
Since it is boiled in the water, if it is drained as it is, it may affect the water distribution pipe. Therefore, a certain time (about 1
(00 hours), and when the hot water in the hot water storage tank 1 reaches a low temperature (about 40 ° C.), the drainage electric valve 6 is opened to drain the hot water in the hot water storage tank 1. The drainage motor-operated valve 6 is opened after a certain period of time (about 1 hour, which can be seen from the capacity of the hot water storage tank 1). By closing the drainage motor-operated valve 6, invasion of insects and the like can be prevented as in the closing operation of the water drain motor-operated valve 9 described above.
If the user does not operate the water draining switch (not shown) of the water heater using panel (not shown) when returning home, the manager's central water heater ON / OFF switching means 15 of the central control panel 7
The same operation is performed in response to the drainage instruction by the operation, hot water in the hot water storage tank 1 and drainage in the pipe can be drained, and freeze prevention in the pipe is performed.

When the water supply motor operated valve 3 has an open failure,
When the user is using the water heater, it can be used in the same way as when the water supply motor operated valve 3 is not broken, but the user opened the manual drain valve which is the first operation of the drain manual valve when returning home. In this case, since the water supply motor-operated valve 3 has an open failure, water will continue to leak. Further, even if the user forgets to close the manual drain valve at the end of drainage, the water supply motor-operated valve 3 has an open failure, so that water continues to leak. When the electrically operated water supply valve fails to close, water is not supplied from the water supply source, so that the hot water storage tank 1 is not supplied with water from the hot water supply source, and the user cannot use hot water.

When the electric hot water supply valve 5 has a malfunction due to opening, when the manager instructs the water heater ON / OFF switching means 15 of the centralized control panel 7 to supply water,
Since the user opened the curry 2 last time, even if water is supplied to the hot water storage tank 1, the hot water supply electric valve 5 is supplied from the water supply port of the hot water storage tank 1.
→ Hot water supply pipe → Water leaks through Karan 2 and the user cannot use the water heater. When the electric hot water supply valve 5 fails to close, the hot water storage tank 1 becomes full and the water in the hot water storage tank 1 is boiled by the heater 12. However, even if the user opens the cana 2 Since hot water will not be supplied, hot water cannot be used because only water from the secondary water supply pipe comes from Karan.

When the drainage motor-operated valve 6 has an open failure, all the water supplied into the hot water storage tank 1 is drained from the drainage motor-operated valve 6 even if the water supply motor-operated valve 3 is opened according to a water supply instruction from a manager. When the drainage motor-operated valve 6 is closed and malfunctions, the user contacts the manager to clean the hot water storage tank 1 according to the manager's water supply instruction, but the cleaned water is not drained from the drainage motorized valve 6. The user will use water containing the wash water. In addition, after the user returns home, even if the user tries to drain the water in the drainage instruction hot water storage tank 1, it cannot be drained because the drainage motor-operated valve 6 has a closing failure, and the previous water is boiled again by the heater 12 at the next use. Will be used.

When the water drain motor-operated valve 9 has an open failure, the water in the secondary water supply pipe, the hot water supply pipe, and the hot water are drained through the water drain pipe and are not supplied to the currant 2. Therefore, the user cannot use hot water.
When the water drain motor-operated valve 9 has a closing failure, even if the user drains water after returning home, the inside of the pipe is not drained, and there is a risk that the pipe may burst due to freezing.

The user cannot use the water heater in the failure of each motor-operated valve, or the pipe is ruptured, or
You will use it without knowing the wash water or the hot water that was boiled last time. In addition, even if you request repair of the water heater, you must wait for the hot water to be used until the repair is completed.
Therefore, for the failure of the water supply motor-operated valve 3, the water supply motor-operated valve abnormality detection means 16 is used, for the failure of the hot water supply motor-operated valve 5, the hot water supply motor operated valve abnormality detection means 17 is used, and for the failure of the drainage motor-operated valve 6. Is provided with drainage motor-operated valve abnormality detection means 18, and with respect to a failure of the water drainage motorized valve 9, water drainage motorized valve abnormality detection means 19 is provided.
When any one of the motor-operated valves fails, the compulsory closing group 24 closes all the motor-operated valves.

[0021]

However, in such a conventional hot water storage type water heater as described above, when any one of the electric valves fails, the forced closing means 24 closes all the electric valves, so that repair is required. The user will not be able to use the water heater until requested and repaired. Due to the unique location conditions of resort condominiums, it may not be possible to quickly respond to repairs, and users will not be able to enjoy the resort.

The present invention prevents water from leaking out even when each motor-operated valve fails, and prevents the user from unknowingly using the wash water in the hot water storage tank or the last remaining water, while waiting for repair. However, it is an object of the present invention to provide a water supply / drainage device in which a water heater can be used at least manually.

[0023]

In order to achieve the above object, the present invention provides a hot water storage type water heater, an electric water supply valve provided in a water supply pipe for supplying water from a water supply source to a hot water storage tank of the water heater, and a hot water storage tank. An electric drainage valve provided in a drainage pipe connected to the drainage port, an electric hot water supply valve provided in a hot water supply pipe for supplying hot water from the hot water outlet of the hot water storage tank to the currant, and a secondary water supply branched from the secondary side of the electrically operated water supply valve. An abnormality detection is performed on the water drainage motor-operated valve that drains the water in both the pipe and the hot water supply pipe, and the motor-operated valves of the water supply motor-operated valve, the drainage motor-operated valve, the hot water supply motor-operated valve, and the water drainage motor-operated valve Abnormality means, abnormality detection invalidation setting means for invalidating the abnormality of all valves or each valve detected by the abnormality detection means, forced closing means for forcibly closing each electric valve, and the abnormality Abnormality of each motorized valve is detected by the detection means, and When the detection of invalidity is not input by the detection invalidation setting means, all the motor-operated valves are closed by driving the forced closing means, and the abnormality detection invalidation is input by the abnormality detection invalidation setting means. When it is on, the control device that does not drive the forced closing means is provided.

[0024]

According to the present invention, even when any one of the motor-operated valves having the above-mentioned configuration is abnormal, the abnormality detection invalid setting means of the motor-operated valve having the abnormality is used to detect the abnormality and replace the abnormal motor-operated valve. If there is a manual valve in, the hot water can be used with the manual valve, and even if there is no manual valve, the electric valve can be opened / closed to one state.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a controller for a water heater according to the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a water supply / drainage device for a water heater according to an embodiment of the present invention. Reference numeral 1 denotes a hot water storage tank that stores water supplied from a water supply source. 2 is a curran, which is a faucet when the user uses water (hot water) adjusted to an appropriate temperature. Reference numeral 3 denotes a water supply electric valve provided in a water supply pipe for supplying water from a water supply source, and a hot water supply pipe for supplying water to the hot water storage tank 1 from a side (secondary side) of the hot water supply electric valve 3 which is not connected to the water supply source. , It is branched into two pipes of a secondary water supply pipe for supplying water to Karan 2.

Numeral 4-1 is a first check valve, in which water supplied from the hot water supply pipe to the hot water storage tank 1 flows back from the hot water storage tank 1 to the water supply source, the water supply pipe, and the secondary water supply pipe to the currant 2. Try not to. Reference numeral 10-1 denotes a water supply flow rate sensor 1 provided in the water supply pipe, which detects the flow amount of water supplied from the water supply source to the hot water storage tank 1 through the water supply pipe. Hot water storage tank 1
Water supply to the hot water tank 1
The air inside is deflated.

The hot water is heated by the heater 12 supplied to the hot water storage tank 1 to become hot water. The hot water heated in the hot water storage tank 1 is connected from the hot water supply pipe to the curran 2 through the hot water supply electric valve 5 provided in the hot water supply pipe, and the water supplied by the user from the water supply source through the secondary water supply pipe, It is mixed so as to have an appropriate temperature and supplied from Karan 2.

Reference numeral 4-2 is a second check valve provided in the drain pipe connected to the hot water supply pipe. Further, 4-3 is a third check valve provided in the water drain pipe connected to the secondary water supply pipe. The second check valve 4-2 is from the water supply source to the hot water supply pipe through the drain pipe, and the third check valve 4-3 is the water to the secondary water supply pipe through the drain pipe. Backflow is prevented and water is prevented from flowing into the hot water supply pipe from the water supply pipe through the water drain pipe when the water supply motor operated valve 3 is opened.

Reference numeral 6 denotes a drainage motor-operated valve provided in a water distribution pipe connected to the drainage port of the hot water storage tank 1. Reference numeral 9 denotes a water draining motor valve provided on the water draining pipe in which the water draining pipe connected to the hot water supply pipe and the water draining pipe connected to the secondary water supply pipe are combined into one. Further, a water supply pipe that connects the water supply flow rate sensor 10-1 and the first check valve 4-1 is also connected to the drain pipe connected to one pipe.

Reference numeral 7 is installed in a manager's room or the like, and a user issues a water supply (hot water temperature) / drainage instruction to the control device 8 by communication.
Upon receiving the water supply instruction, the control device 8 opens the water supply motor-operated valve 3 and supplies water to the hot water storage tank 1. When the water in the hot water storage tank 1 is boiled up by the heater 12, the user's body 2
The hot water supply motor-operated valve 5 is opened by the opening operation to supply the hot water to the calan 2 (the drainage motor-operated valve 6 and the water drain motor-operated valve 9 are closed).

When the drainage instruction is received, the water supply electric valve 3 is closed, the hot water supply electric valve 5 is opened, and the water draining electric valve 9 is opened. Water in the water supply pipe, secondary water supply pipe, and hot water supply pipe is drained from the drain pipe. (Drainage electric valve 6 is closed) After 1 hour, the hot water supply electric valve 5 and the water draining electric valve 9 are closed. Hot water storage tank 1
The hot water inside is cooled and waits until it becomes water, and 100 hours after the draining instruction, the drainage electric valve 6 is opened to drain the water in the hot water storage tank 1.

Reference numeral 16 is a water supply electric valve abnormality detecting means for detecting an abnormality of the water supply electric valve. Reference numeral 17 denotes hot water supply electric valve abnormality detection means for detecting abnormality of the hot water supply electric valve. Reference numeral 18 is a drainage electric valve abnormality detecting means for detecting abnormality of the drainage electric valve. 1
Reference numeral 9 denotes a water drain motor-operated valve abnormality detecting means for detecting abnormality of the water drain motor-operated valve. Reference numeral 20 denotes a water supply electric valve abnormality detection invalidation setting means for setting invalidation of abnormality detection of the water supply electric valve. Reference numeral 21 denotes a hot water supply electric valve abnormality detection invalidation setting means for setting invalidation of abnormality detection of the hot water supply electric valve. Reference numeral 22 denotes a drainage motor-operated valve abnormality detection invalidity setting means for setting invalidation of abnormality detection of the drainage motorized valve. Reference numeral 23 denotes a water drain motor-operated valve abnormality detection invalidity setting means for setting invalidation of abnormality detection of the water drain motor-operated valve. Reference numeral 24 is a forced closing means that closes all the motor-operated valves when an abnormality is detected in each motor-operated valve.

The abnormality detection means 16 to 19 for each electric valve detects an abnormality in each electric valve, and when an abnormality occurs, the forced closing means 24 closes all the electric valves to detect the abnormality in each electric valve. Prevents water from leaking. Also, since all the motor-operated valves are closed when any one of the motor-operated valves becomes abnormal,
The user knows the abnormality of the water heater, and by contacting the manager and requesting repair, it prevents the user from unknowingly using the wash water in the hot water storage tank 1 or the remaining water from the last visit. it can.

The operation when the controller 8 detects an abnormality in any one of the water supply electric valve 3, the hot water supply electric valve 5, the drainage electric valve 6, and the water draining electric valve 9 will be described with reference to the abnormality detection flowchart of FIG. Explain. When an abnormality of the water supply electric valve 3 is detected by the water supply electric valve abnormality detecting means 16 in STEP 1,
It is determined whether or not the abnormality detection of abnormality is not set by the water supply motorized valve abnormality detection invalidation setting means 20. Control closing means 24 that closes all the motor-operated valves when the abnormality detection is not set to be invalid by the water supply electrically operated valve abnormality invalidation setting means 20.
Drive all the motor-operated valves. When the abnormality detection disabling of the water supply motor-operated valve 3 is set by the water supply motor-operated valve abnormality detection disabling means 20, the forced closing means 24 is not driven and the abnormality detection of the next motor-operated valve is performed. Hereinafter, similar determinations are made for the hot water supply electric valve 5, the drainage electric valve 6, and the water drain electric valve 9. Note that the order of determination is random.

Therefore, even if any one of the motor-operated valves is once determined to be abnormal, the abnormality detection disabling means corresponding to the motor-operated valve determined to be abnormal is set to disable the abnormality detection. The normal electric motor valve is no longer forcibly closed, and the abnormal electric valve is manually opened / closed, so that the water heater can be used temporarily.

[0036]

As is apparent from the above embodiments, the water supply / drainage device for a hot water storage water heater according to the present invention includes abnormality detecting means for detecting abnormality of each motor-operated valve and all the abnormality detecting means. The abnormality detection invalid setting means for invalidating the abnormality of the valve or each valve, the forced closing means for forcibly closing each electric valve, and the abnormality detection means for detecting the abnormality of each electric valve. And, when the abnormality detection invalidity setting means does not input the abnormality detection invalidity, the forced closing means is driven to close all electric valves, and the abnormality detection invalidity setting means invalidates the abnormality detection. The following effects can be obtained by providing a control device that does not drive the forced closing means when the input is made. (1) By detecting the abnormalities of all the motor-operated valves, it is possible to prevent water from leaking even when each motor-operated valve fails. (2) It is possible to prevent the user from unknowingly using the wash water in the hot water storage tank or the last remaining water. (3) Even if any of the motor-operated valves becomes abnormal, the detection of the abnormality is disabled by the abnormality detection disabling setting means of the motor-operated valve that has become abnormal, so that the water heater can be used manually. .

[Brief description of drawings]

FIG. 1 is a configuration diagram of a water supply / drainage device for a hot water storage type water heater according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional water supply / drainage device for a hot water storage type water heater.

FIG. 3 is an external view of a centralized control panel of the same embodiment.

FIG. 4 is an abnormality detection flowchart of the embodiment.

[Explanation of symbols]

 1 Hot Water Storage Tank 2 Karan 3 Water Supply Motorized Valve 4-1 First Check Valve 4-2 Second Check Valve 4-3 Third Check Valve 5 Hot Water Supply Motorized Valve 6 Drainage Motorized Valve 7 Central Control Panel 8 Control Device 9 Water-operated electric valve 13 Power supply display means 14 Door-to-door water heater usage status display means 15 Door-to-water water heater ON / OFF switching means 16 Water supply electric valve abnormality detection means 17 Hot water supply electric valve abnormality detection means 18 Drainage electric valve abnormality detection means 19 Water Pull-out electric motor valve abnormality detection means 20 Water supply electric valve abnormality detection invalid setting means 21 Hot water supply electric valve abnormality detection invalid setting means 22 Drainage electric motor valve abnormality detection invalid setting means 23 Water drain electric valve abnormality detection invalidation setting means 24 Forced closing means

Claims (1)

[Claims] 1. A hot water storage type water heater, a water supply electric valve provided in a water supply pipe for supplying water from a water supply source to a hot water storage tank of the water heater, and a drainage electric valve provided in a drain pipe connected to a drain port of the hot water storage tank. , A hot water supply electric valve provided in a hot water supply pipe for supplying hot water from the hot water outlet of the hot water storage tank to the currant, and water for draining water in both the secondary water supply pipe branched from the secondary side of the electric water supply electric valve and the hot water supply pipe A drainage motor valve, an abnormality detection means for detecting abnormality of each motorized valve of the water supply motorized valve, the drainage motorized valve, the hot water supply motorized valve and the water drainage motorized valve, and all the valves detected by the abnormality detection means. Alternatively, abnormality detection invalid setting means for invalidating the abnormality of each valve, forced closing means for forcibly closing each electric valve, and abnormality of each electric valve is detected by the abnormality detecting means, In addition, invalidity detection is input by the abnormality detection invalidation setting means. If not, a control device that drives the forced closing means to close all the motor-operated valves, and does not drive the forced closing means when the abnormality detection invalidity setting means inputs invalidity of abnormality detection. A water supply and drainage device for the hot water storage type hot water heater equipped.