JP2008082635A - Hot water storage type water heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hot water storage type water heater capable of detecting such a state that a hot water supply valve is kept in an opened state, and preventing continuation of hot water supply from a hot water storage tank to a bathtub. <P>SOLUTION: This hot water storage type water heater comprises a hot water storage tank 1 for storing hot water, a heat source machine for heating up the hot water in the hot water storage tank 1, a hot water supply pipe 9 for supplying water of high temperature from the hot water storage tank 1, a hot water/water mixing valve 13a for connecting the hot water supply pipe 9 and a water supply pipe 12 for supplying the water, a bathtub hot water supply pipe 24 for supplying the hot water/water mixed by the hot water/water mixing valve 13b to the bathtub, a bathtub hot water supply valve 25 for starting or stopping the supply of hot water/water to the bathtub 30, and a flow rate detecting means 26 for detecting a flow rate of the hot water/water supplied to the bathtub 30. When the flow rate detecting means 26 detects that the supply of hot water/water to the bathtub 30 is not stopped even though a signal for stopping the supply of hot water/water is output to the bathtub hot water supply valve 25, a start signal for starting the supply of hot water/water and a stop signal for stopping the supply of hot water/water are alternately repeatedly output to the bathtub hot water supply valve 25 by the predetermined number of times. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a hot water storage type hot water supply apparatus having a hot water storage tank and capable of hot water filling operation by supplying hot water in the hot water storage tank to a bathtub.

Conventionally, this type of hot water storage type hot water heater monitors the supply state of hot water to the bathtub after closing the pouring valve for pouring hot water in the hot water storage tank into the bathtub when performing hot water filling operation to the bathtub. The function to perform was not provided (for example, refer patent document 1).
JP 2003-042534 A

  However, in the conventional configuration, even when a stop output is performed for the pouring valve, a failure occurs while the pouring valve is open, or when the pouring valve is sufficiently blocked by dust. In the case where the ability is not obtained, there is a problem that hot water continues to be supplied from the hot water storage tank to the bathtub, and the hot water overflows from the bathtub. In addition, the hot water storage tank can store only a limited amount of hot water, and when the hot water is continuously supplied to the bathtub, the hot water runs out.

  The present invention solves the above-mentioned conventional problems, even when a failure occurs while the pouring valve is open, or when a sufficient amount of clogging capacity cannot be obtained due to the biting of dust into the pouring valve. It is an object of the present invention to provide a hot water storage type hot water heater that detects a state and prevents hot water from being continuously supplied from a hot water storage tank to a bathtub.

  In order to solve the above-described conventional problems, a hot water storage type water heater of the present invention includes a hot water storage tank for storing hot water, a heat source device for boiling hot water in the hot water storage tank, and a hot water supply pipe for discharging hot water from the hot water storage tank. A hot water mixing valve that connects the hot water supply pipe and a water supply pipe that supplies water, a bathtub pouring pipe that pours hot water mixed by the hot water mixing valve into the bathtub, and supply of hot water to the bathtub A bath pouring valve for starting or stopping the water and a flow rate detecting means for detecting the flow rate of the hot water supplied to the bathtub, and a signal for stopping the hot water supply to the bathtub pouring valve is output. When the flow rate detecting means detects that the hot water supply to the bathtub is not stopped, the start signal for starting the hot water supply to the bathtub pouring valve and the stop to stop the hot water supply are stopped. Signals are repeatedly output alternately a specified number of times Characterized in Rukoto, it is possible to eliminate the biting of failure and dust that remains pouring valve is opened.

Further, the hot water storage type water heater of the present invention comprises a hot water storage tank for storing hot water, a heat source device for boiling hot water in the hot water storage tank, a hot water pipe for discharging hot water from the hot water storage tank, the hot water pipe and water. Hot water / water mixing valve for connecting to the water supply pipe to be supplied, bathtub hot water pipe for pouring hot water mixed by the hot / cold water mixing valve into the bathtub, and bath pouring for starting or stopping the supply of hot water to the bathtub A bath heat exchanger for exchanging heat between the valve, hot water in the hot water storage tank and hot water in the bathtub, and the bath heat exchanger connected to the bathtub pouring pipe and circulating hot water in the bathtub A bath circulation circuit for passing water, and hot water detection means for detecting the circulation of hot water in the bath circulation circuit, although a signal for stopping the supply of hot water to the bathtub pouring valve is output, Supply of hot water to the bathtub is stopped by the flow rate detection means. When it is detected that the hot water supply is not performed, a start signal for starting the supply of hot water and a stop signal for stopping the supply of hot water are alternately output a predetermined number of times to the bathtub pouring valve. Even in circuits with bath heat exchangers,
It is possible to detect a state where hot water is continuously supplied by the hot water detection means, and to eliminate the trouble that the pouring valve remains open and the biting of dust.

  The present invention detects the state even when a failure occurs with the pouring valve open or when the pouring valve does not provide sufficient closing capacity due to dust being caught in the pouring valve. Therefore, it is possible to provide a hot water storage type water heater that prevents the hot water from being continuously supplied.

  A hot water storage type water heater of the first invention includes a hot water storage tank for storing hot water, a heat source device for boiling hot water in the hot water storage tank, a hot water pipe for discharging hot water from the hot water storage tank, the hot water pipe and water. Hot water / water mixing valve for connecting to the water supply pipe to be supplied, bathtub hot water pipe for pouring hot water mixed by the hot / cold water mixing valve into the bathtub, and bath pouring for starting or stopping the supply of hot water to the bathtub A flow rate detecting means for detecting a flow rate of hot water supplied to the bathtub and a signal for stopping the supply of hot water to the bathtub pouring valve is output by the flow rate detecting means. When it is detected that the supply of hot water to the bathtub has not been stopped, a start signal for starting the supply of hot water and a stop signal for stopping the supply of hot water to the bathtub pouring valve alternately for a predetermined number of times. Repeated output opens the pouring valve In the daytime when hot water is not supplied from the tank to the bathtub, the hot water in the hot water storage tank is prevented from running out, and the electricity bill is expensive when the hot water occurs. It is possible to prevent an increase in electricity costs when performing a boiling operation.

  A hot water storage type water heater according to a second aspect of the present invention comprises a hot water storage tank for storing hot water, a heat source device for boiling hot water in the hot water storage tank, a hot water discharge pipe for discharging hot water from the hot water storage tank, the hot water supply pipe and water. Hot water / water mixing valve for connecting to the water supply pipe to be supplied, bathtub hot water pipe for pouring hot water mixed by the hot / cold water mixing valve into the bathtub, and bath pouring for starting or stopping the supply of hot water to the bathtub A bath heat exchanger for exchanging heat between the valve, hot water in the hot water storage tank and hot water in the bathtub, and the bath heat exchanger connected to the bathtub pouring pipe and circulating hot water in the bathtub A bath circulation circuit for passing water, and hot water detection means for detecting the circulation of hot water in the bath circulation circuit, although a signal for stopping the supply of hot water to the bathtub pouring valve is output, Supply of hot water to the bathtub is stopped by the flow rate detection means When it is detected that the hot water tank has not been operated, a hot water storage tank is alternately output a start signal for starting the supply of hot water and a stop signal for stopping the supply of hot water to the bathtub pouring valve a predetermined number of times. Even in a circuit with a bath heat exchanger that can use hot water in the bathtub to replenish hot water in the bathtub, the hot water detection means detects that hot water is being supplied and the pouring valve opens. Daytime hours during which hot water can be prevented from continuing to be supplied from the tank to the bathtub, hot water in the hot water storage tank is suppressed, and electricity charges are high when a hot water breaks out. Therefore, it is possible to prevent a rise in electricity costs when performing a boiling operation.

  The hot water storage type hot water heater of the third invention is the first or second invention, in particular, for the bathtub pouring valve, a start signal for starting the supply of hot water and a stop signal for stopping the supply of hot water, Even if the output is alternately repeated a predetermined number of times, if it is detected by the flow rate detection means or the hot water detection means that the supply of hot water to the bathtub is not stopped, the opening degree of the hot water mixing valve is fully opened to the water side, Since the use of hot water from the hot water storage tank can be stopped, use of hot water in the hot water storage tank is prevented.

The hot water storage type hot water supply apparatus of the fourth invention is a hot water storage type hot water supply machine according to the first to third aspects of the invention, particularly comprising an intermediate temperature hot water discharge pipe for discharging an intermediate temperature from a substantially middle portion of the hot water storage tank, and the intermediate temperature hot water supply between the hot water mixing valve and the hot water discharge pipe. By using an intermediate temperature mixing valve that mixes the hot water discharged from the pipe with the hot water discharged from the hot water pipe, the use of the hot water reduces the use of hot water, allowing more efficient use of hot water. It becomes.

  A hot water storage type water heater according to a fifth aspect of the present invention includes a remote control having an operation unit for a user to input an operation and a display unit for displaying an operation status and setting contents, particularly in the first to fourth aspects of the invention. Even if a start signal for starting the supply of hot water and a stop signal for stopping the supply of hot water are alternately output to the hot water valve a predetermined number of times alternately, the flow rate detection means or the hot water detection means can supply hot water to the bathtub. When it is detected that the supply is not stopped, a message indicating that the hot water supply does not stop is displayed on the display unit, so that a service person can help identify a defective part when repairing the device. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a configuration diagram of a hot water storage type hot water heater in the present embodiment. In addition, the arrow shown in FIG. 1 has shown the direction through which hot water or a refrigerant circulates. The hot water storage type water heater of the present embodiment includes a hot water storage tank 1 that stores hot water, a circulation pump 2 that circulates the hot water stored in the hot water storage tank 1, a water refrigerant heat exchanger 3 that performs heat exchange between the refrigerant and hot water, Are connected to each other in an annular manner through a hot water supply pipe, and have a hot water supply circuit 4 indicated by a thick line in FIG. 1, and further, as a heating source for heating hot water in the hot water storage tank 1, a water refrigerant heat exchanger 3 and a compression for compressing the refrigerant The machine 5, the evaporator 6 that absorbs heat from the outside air, and the expansion valve 7 that decompresses the refrigerant are sequentially connected in an annular manner with refrigerant piping, and has a refrigerant circuit 8 indicated by a thick line in FIG. 1.

  In the present embodiment, the refrigerant circuit 8 includes a water-refrigerant heat exchanger 3, a compressor 5, an evaporator 6, and an expansion valve 7 that are annularly connected by a refrigerant pipe and uses carbon dioxide as the refrigerant. The side exceeds the critical pressure. For this reason, the water flowing through the water-refrigerant heat exchanger 3 does not condense even if the temperature drops and the temperature drops, and it becomes easy to form a temperature difference between the refrigerant and water in the water-refrigerant heat exchanger. Thus, hot water can be obtained and the heat exchange efficiency can be increased. In addition, since carbon dioxide, which is relatively inexpensive and stable, is used as the refrigerant, the product cost can be reduced and the reliability can be improved. In addition, carbon dioxide has an ozone depletion coefficient of zero and a global warming coefficient of about 1/700 of the alternative refrigerant HFC-407C, which is very small. Further, the refrigerant is compressed by the compressor 5, the refrigerant discharged from the compressor 5 radiates heat by the water refrigerant heat exchanger 3, is decompressed by the expansion valve 7, and then absorbs heat from the air by the evaporator 6, The gas is again sucked into the compressor 5.

  A hot water supply pipe 9 for discharging hot water is connected to the upper part of the hot water storage tank 1, and a water supply pipe 10 for supplying water to the lower part of the hot water storage tank 1 reduces the water pressure from the water supply. The pressure reduction valve 11 is connected. The hot water supply pipe 9 is connected to a water supply pipe 12 branched from the water supply pipe 10 by a hot water mixing valve 13a, mixed at an appropriate temperature by the hot water mixing valve 13a, and then discharged from the currant 14 or the shower 15. Further, a thermistor (hot water temperature detecting means) 17a is disposed in the piping on the outlet side of the hot water / water mixing valve 13a, and the hot water / water mixing valve 13a is controlled so that the thermistor 17a reaches the target temperature. When hot water is discharged from the currant 14 (shower 15), hot water stored in the hot water storage tank 1 is used, and water is supplied from the water supply pipe 10 to the hot water storage tank 1 accordingly. Therefore, the hot water storage tank 1 is always filled with hot water. It has become a state.

In addition, when the hot water in the hot water storage tank 1 is boiled, the circulating pump 2 is driven, so that hot water in the hot water storage tank 1 is discharged from the heat pump outlet provided at the lower part of the hot water storage tank 1, and the water refrigerant heat exchanger. 3 flows. In the water-refrigerant heat exchanger 3, hot water and refrigerant exchange heat to generate a high temperature and return to the hot water storage tank 1 from a heat pump return port disposed in the upper part of the hot water storage tank 1. In the hot water storage tank 1, due to the difference in specific gravity, a temperature layer is formed in which the upper part is hot and the lower part is low. In the hot water storage tank 1, a plurality of thermistors (remaining hot water temperature detecting means) 16a, 16b, 16c, 16d for detecting the temperature of the hot water in the hot water storage tank 1 are arranged. The boundary where hot water and water are separated is determined based on the temperature detected by the remaining hot water temperature detecting means, and the amount of hot water stored in the hot water storage tank 1 is determined.

  Further, a hot water supply pipe 21 for discharging hot water is connected to the upper part of the hot water storage tank 1, and the hot water supply pipe 21 is a bath heat exchanger 22 for exchanging heat between the water in the bathtub 30 and the water in the hot water storage tank 1. It is connected to the. The hot water after the heat exchange flowing out of the bath heat exchanger 22 is returned to the lower part of the hot water storage tank 1. As described above, the hot water storage type water heater of the present embodiment connects the hot water storage tank 1, the bath heat exchanger 22, and the circulation pump (hereinafter referred to as a reheating pump) 28 in an annular shape through a hot water supply pipe. The bath additional cooking circuit 23 shown in FIG.

  In addition, the hot water storage type water heater of the present embodiment has a bathtub 30, and the hot water supply pipe 9 and the water supply pipe 12 are connected by a hot water mixing valve 13b and mixed at an appropriate temperature by the hot water mixing valve 13b. Then, it is poured into the bathtub 30 through the bathtub pouring pipe 24. The bathtub pouring pipe 24 is provided with a bathtub pouring valve 25 that starts and stops the supply of hot water to the bathtub, and includes a flow rate sensor 26 that is a flow rate detecting means on the downstream side of the bathtub pouring valve 25. ing.

  An adapter 27 is attached to the bathtub 30, and an outward pipe 31 and a return pipe 32 are connected to the adapter 27. A return pipe 32, a flow sensor 33 for detecting the presence or absence of hot water, a bath heat exchanger 22, a circulation pump (hereinafter referred to as a bath pump) 34, and an outgoing pipe 31 are sequentially connected in an annular manner with a hot water supply pipe. Has a bath circulation circuit 35 indicated by a thick line. A bathtub pouring pipe 24 is connected between the bath heat exchanger 22 and the flow sensor 33.

  About the hot water storage type water heater configured as described above, a hot water filling operation to a bathtub will be described below.

  Hot water filling to the bathtub 30 is supplied to the bath circulation circuit 35 by mixing hot water discharged from the hot water supply pipe 9 and water from the water supply pipe 12 at an appropriate temperature by the mixing valve 13b. In the present embodiment, a thermistor (hot water temperature detecting means) 17b is disposed in the hot water side piping of the mixing valve 13b, and the hot water mixing valve 13b is controlled so that the thermistor 17b reaches the target temperature. . The hot water after being supplied to the bath circulation circuit 35 is divided into an outgoing pipe 31 and a return pipe 32, and hot water is supplied from the adapter 27.

  The bathtub pouring pipe 24 is provided with a bathtub pouring valve 25 and a flow rate sensor 26, and a start signal for starting pouring from the microcomputer (control device) 18 to the bathtub 30 / note to the bathtub 30. The bathtub pouring valve 25 is opened and closed in response to a stop signal for stopping hot water, and information on the amount of hot water detected by the flow sensor 26 is input to the microcomputer 18. That is, the open / closed state of the bathtub pouring valve 25 can be determined from the information of the flow sensor 26 (detection information of the hot water supply amount).

  Next, the hot water reheating operation in the bathtub will be described.

  The reheating of the hot water in the bathtub 30 is performed by the bath reheating circuit 23 that circulates the hot water in the hot water storage tank and the bath circulation circuit 35 that circulates the hot water in the bath 30 in the bath heat exchanger 22. It is realized by doing.

  When the hot water in the bathtub 30 is cooked, the hot water in the hot water storage tank 1 flows into the bath heat exchanger 22 through the hot water supply pipe 21 by driving the reheating pump 28 in the bath additional cooking circuit 23, and the bath After radiating heat with the heat exchanger 22, it is returned to the lower part of the hot water storage tank 1.

  At the same time, in the bath circulation circuit 35, the bath pump 34 is driven so that hot water in the bathtub 30 flows into the bath heat exchanger 22, receives heat at the bath heat exchanger 22, and then returns to the bathtub 30. The bath circulation circuit 35 is provided with a thermistor (bath temperature detecting means) 37 on the inlet side of the bath heat exchanger 22 and a flow sensor 33 as hot water detection means on the outlet side of the bath heat exchanger 22. When the temperature detected by 37 reaches a predetermined temperature, the additional cooking pump 28 and the bath pump 34 are stopped, and the additional cooking operation for the bath is ended.

  When the flow sensor 33 detects the presence or absence of hot water, the presence or absence information of hot water is input to the microcomputer 18. By interposing the flow sensor 33 in the return pipe 32, the hot water supply direction to the bathtub 30 and the hot water flow direction when the bath is reheated are the same direction. 25 open / closed states can be determined. Moreover, the hot water in the bathtub 30 is made to flow through the bath circulation circuit 35 by driving the bath pump 34, but when the hot water is not detected by the flow sensor 33 even if the bath pump 34 is driven, the bathtub is more than the adapter 27. It means that the surface of the hot water in 30 is below, and the water surface position of the hot water in the bathtub 30 can also be determined by the flow sensor 33.

  FIG. 2 is a flowchart of a hot water filling operation of the hot water storage type water heater in the present embodiment. The hot water filling operation of the hot water storage type water heater in the present embodiment will be described with reference to FIG.

  (Step 1) In order to perform the hot water filling operation to the bathtub 30, the user performs the hot water filling operation start operation with the operation unit 51 of the remote controller 50, and the hot water filling operation is started. Next, go to step 2.

  (Step 2) When the hot water filling operation is started, the microcomputer 18 outputs the start of hot water supply to the bathtub pouring valve 25, the bathtub pouring valve 25 is opened, and hot water supply to the bathtub 30 is started. Next, go to step 3.

  (Step 3) The amount of hot water supplied to the bathtub 30 is measured by the flow sensor 26, and it is determined whether or not a predetermined amount is reached. If the predetermined amount has not been reached, the measurement is continued until the predetermined amount is reached. If the predetermined amount has been reached, the process proceeds to step 4.

  (Step 4) At the same time as the amount of hot water supplied to the bathtub 30 reaches a predetermined amount, the microcomputer 18 outputs a hot water supply stop to the bathtub pouring valve 25 to close the bathtub pouring valve 25. Next, go to step 5.

  (Step 5) If there is no hot water supply based on the output information of the flow sensor 26, the process proceeds to Step 9, and if there is hot water supply, the process proceeds to Step 6.

  (Step 6) When there is hot water supply, it is determined that a failure has occurred with the bathtub pouring valve 25 open, or that the tub pouring valve 25 has been contaminated with dust and a sufficient closing ability has not been obtained. Then, the bathtub pouring valve 25 is made to repeatedly output a signal to be opened and a signal to be closed alternately for a predetermined number of times. Next, the process proceeds to Step 7.

For example, the bathtub pouring valve 25 is composed of a pilot valve, and the plunger in the cylinder moves to the open position by the magnetic force generated by energizing the solenoid coil in the hot water start signal, and the solenoid in the stop signal Assume that the plunger returns to the closed position by spring pressure by stopping energization of the coil. In a failure in which the bathtub pouring valve 30 remains open, it is assumed that the plunger is caught in the cylinder and does not return to the closed position due to some reason. Therefore, by repeatedly outputting a signal to enter an open state (start signal) and a signal to enter a close state (stop signal) alternately and repeatedly for a predetermined number of times, magnetic force and spring pressure are alternately applied to the plunger, and the hook is not caught. It can be expected to be resolved. Also, it can be expected that dust will be removed by alternately outputting a signal to enter an open state (start signal) and a signal to enter a closed state (stop signal) alternately and repeatedly a predetermined number of times. .

  (Step 7) The microcomputer 18 outputs a hot water supply stop to the bathtub pouring valve 25 to close the bathtub pouring valve 25. Next, go to step 8.

  (Step 8) The amount of hot water supply is confirmed again by the flow sensor 26. If there is no hot water supply, the process proceeds to Step 9, and if there is hot water supply, the process proceeds to Step 10.

  (Step 9) Since the hot water supply is normally finished, the display 52 of the remote controller 50 displays, for example, “Bath operation has been completed” and the like, and it has been confirmed that the hot water supply has stopped. Driving the pump 34 shifts to the next operation such as a circulation check whether the water level in the bathtub 30 exceeds the adapter 27 or a hot water reheating operation in the bathtub 30.

  (Step 10) Since hot water supply has ended abnormally, the bathtub pouring valve 25 remains open, so water continues to flow into the bathtub 30, but the display section 52 of the remote controller 50 indicates, for example, “Bath operation is completed. By displaying such as “Done”, the user is informed that the bath operation has been completed, and the user is informed that another abnormality has occurred. At this time, for example, by displaying “Hot water supply does not stop” or the like, it is possible to help identify a defective portion when a serviceman performs repair. Further, at this time, the hot water / water mixing valve 13b is driven to the fully open position on the water side, so that wasteful outflow of hot water from the hot water storage tank 1 can be prevented.

  As described above, in the embodiment of the present invention, when the flow rate sensor 26 detects that the supply of hot water to the bathtub 30 is not stopped, the start of supplying hot water to the bathtub pouring valve 25 is started. By repeatedly outputting a signal and a stop signal for stopping the supply of hot water a predetermined number of times alternately, it is possible to eliminate the trouble that the bathtub pouring valve 25 remains open and the biting of dust, and It is possible to prevent hot water from continuing to be supplied to the bathtub, and to suppress running out of hot water in the hot water storage tank.

  Further, in the present embodiment, it is determined whether or not the hot water supply to the bathtub 30 is stopped using the flow sensor 26, but the same applies even if the flow sensor 33 provided in the bath circulation circuit 35 is used. The effect of can be obtained.

(Embodiment 2)
FIG. 3 is a configuration diagram of a hot water storage type hot water heater in the present embodiment. In addition, the same code | symbol is attached | subjected about the part same as Embodiment 1, and the description is abbreviate | omitted. The present embodiment is different from the first embodiment in that a hot water supply pipe to the bathtub 30 is provided with an intermediate hot water discharge pipe for discharging an intermediate temperature portion of the hot water storage tank 1, and the other structure is the same. Hereinafter, the configuration of the hot water storage type water heater in the present embodiment will be described.

  In FIG. 3, an intermediate temperature hot water discharge pipe 41 is disposed substantially in the middle of the hot water storage tank 1 so that intermediate temperature water can be discharged from the hot water storage tank 1. Hot water is discharged from the hot water supply pipe 9 provided in the upper part of the hot water storage tank 1 with hot water to the bathtub 30, hot water and intermediate temperature water are mixed in the intermediate temperature mixing valve 40, and hot water is further downstream. It is configured to be mixed with water by the mixing valve 13b.

Moreover, depending on the hot water supply temperature, only one of high-temperature water and medium-temperature water may be used, and hot water from hot water can be suppressed. The set temperature of the hot water supplied to the bathtub 30 is the medium temperature hot water pipe 4
When the temperature of the hot water discharged from 1 is lower than that of the hot water, the hot water can be prevented from being discharged by fully opening the inlet of the intermediate temperature mixing valve 40 toward the intermediate temperature water side.

  As described above, by using medium temperature water for hot water supply to the bathtub 30, the use of high temperature water can be reduced, more efficient use of hot water can be achieved, and the running cost can be reduced.

  Moreover, the abnormality of the bathtub pouring valve 25 can be eliminated by performing the same control as in the first embodiment.

  As described above, the present invention is not limited to a heat pump type hot water storage type hot water heater, but is used for a hot water type hot water heater that supplies hot water from one hot water storage tank in any system such as electricity, gas, oil, and fuel cell. be able to.

Configuration diagram of hot water storage type water heater in Embodiment 1 Flowchart of bathtub filling operation in the first embodiment Configuration diagram of hot water storage type water heater in Embodiment 2

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Circulation pump 3 Water refrigerant heat exchanger 4 Hot water supply circuit 5 Compressor 6 Evaporator 7 Expansion valve 8 Refrigerant circuit 9 Hot water supply pipe 10 Water supply pipe 11 Pressure reducing valve 12 Water supply pipe 13a, 13b Hot water mixing valve 14 Curran 15 Shower 17a , 17b Thermistor (hot water temperature detection means)
18 Control device (microcomputer)
21 Hot Water Supply Pipe 22 Bath Heat Exchanger 23 Bath Heating Circuit 24 Bath Pouring Pipe 25 Bath Pouring Valve 26 Flow Sensor (Flow Detection Means)
27 Adapter 28 Circulation pump (Cooking pump)
30 Bath 31 Forward pipe 32 Return pipe 33 Flow sensor 34 Circulation pump (bath pump)
35 Bath Circulation Circuit 37 Thermistor (Bath temperature detection means)
40 Medium temperature mixing valve 41 Medium temperature hot water pipe 50 Remote control 51 Operation section 52 Display section

Claims (5)

A hot water mixing valve that connects a hot water storage tank for storing hot water, a heat source device for boiling hot water in the hot water storage tank, a hot water discharge pipe for discharging hot water from the hot water storage tank, and a hot water supply pipe for supplying water. A bathtub pouring pipe for pouring hot water mixed with the hot water mixing valve into the bathtub, a bathtub pouring valve for starting or stopping the supply of hot water to the bathtub, and a flow rate of hot water supplied to the bathtub The flow rate detecting means detects the flow rate, and the supply of hot water to the bathtub is not stopped by the flow rate detecting means even though a signal for stopping the supply of hot water is output to the bathtub pouring valve. When this is detected, the hot water storage hot water supply is characterized by alternately outputting a start signal for starting the supply of hot water and a stop signal for stopping the supply of hot water to the bathtub pouring valve a predetermined number of times alternately. Machine. A hot water mixing valve that connects a hot water storage tank for storing hot water, a heat source device for boiling hot water in the hot water storage tank, a hot water discharge pipe for discharging hot water from the hot water storage tank, and a hot water supply pipe for supplying water. A bathtub pouring pipe for pouring hot water mixed by the hot water mixing valve into the bathtub, a bathtub pouring valve for starting or stopping the supply of hot water to the bathtub, hot water in the hot water storage tank, and the A bath heat exchanger that performs heat exchange with hot water in the bathtub, a bath circulation circuit that is connected to the bathtub pouring pipe and circulates the hot water in the bathtub and passes the water to the bath heat exchanger, and the bath Hot water detection means for detecting the circulation of hot water in the circulation circuit, and a signal for stopping the supply of hot water is output to the bathtub pouring valve, but the hot water to the bathtub is detected by the flow rate detection means. When it detects that the supply is not stopped To the bath Note hot water valve, a start signal for starting the hot water supply, and a stop signal for stopping the hot water supply, hot water storage type water heater, which comprises repeatedly output a predetermined number of times alternately. Even if a start signal for starting the supply of hot water and a stop signal for stopping the supply of hot water are alternately output repeatedly to the bathtub pouring valve a predetermined number of times, the flow rate detecting means or the hot water detecting means 3. The hot water storage type hot water supply apparatus according to claim 1, wherein when detecting that the supply of hot water is not stopped, the opening degree of the hot and cold water mixing valve is fully opened to the water side. An intermediate temperature hot water discharge pipe for discharging the intermediate temperature from a substantially central part of the hot water storage tank is provided, and an intermediate temperature for mixing the intermediate temperature water discharged from the intermediate temperature hot water discharge pipe and the high temperature water discharged from the hot water discharge pipe between the hot water mixing valve and the hot water discharge pipe. The hot water storage type hot water supply device according to any one of claims 1 to 3, wherein a mixing valve is provided. A remote control having an operation unit for a user to input an operation and a display unit for displaying an operation status and setting contents is provided, and a start signal for starting the supply of hot water and a supply of hot water are supplied to the bathtub pouring valve. Even if the stop signal to be stopped is repeatedly output alternately a predetermined number of times, if the flow rate detection means or the hot water detection means detects that the supply of hot water to the bathtub has not been stopped, the display section is supplied with hot water. The hot water storage type hot water supply apparatus according to any one of claims 1 to 4, wherein a message not to stop is displayed.

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