JPH1019381A - Hot water heating system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water heating system capable of preventing hot water from a hot water heater from being exhausted even when abnormal communication and abnormal operation happen. SOLUTION: The present hot water heating system includes a hot water heater including a hot water supply controller 14 for controlling the operation of heating means 7 and a circulation pump 10 to boil water to set temperature, an outdoor machine including a compressor 16 for circulating a refrigerant through a refrigerant piping connected with a hot water supply heat exchanger, a plurality of valves 18a, 18b, 18c, 22 provided on the refrigerant piping, and an outdoor controller 23 electrically connected with time hot water supply controller 14 for controlling those valves, and an operation unit 24 for inputting and outputting various control signals of setting boiling temperature of hot water in the hot water storage tank and of setting additional boiling of hot water to the hot water supply controller 14. Herein, there are provided first failure detector means on the hot water supplier for detecting communication failure between the hot water supply controller 14 and the outdoor controller 23, and second failure detector means in the outdoor machine for detecting operation failure of the compressor 16 and the plurality of valves 18a, 18b, 18c, 22.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat pump type hot water supply system having an outdoor unit and a water heater.

[0002]

2. Description of the Related Art FIG. 4 is a schematic diagram of a heat pump type hot water supply system compatible with a late-night power system, and FIG. 5 is a block diagram of a main part thereof. In the drawing, reference numeral 1 denotes a water heater of a hot water supply system, a hot water storage tank 2, a water supply pipe 3 provided at a bottom portion thereof and having a pressure reducing valve 4 for reducing a pressure of a water supply water, and a hot water supply device provided at a ceiling portion of the tank 2. A hot water supply pipe 5 having a relief valve 6 for preventing a pressure rise due to expansion at the time of heating, and a heating element 7 provided at a lower portion in the tank 2 for heating hot water in the tank 2
A first temperature sensor 8 attached to a lower portion of the tank 2 to detect a temperature of hot water in the tank 2; A circulating pump 10 that conveys and circulates the water to the upper portion of the tank 2, a hot water supply heat exchanger 11 that heats the hot water circulated by the circulation pump 10, and a flow rate of the hot water that is heated by the hot water supply heat exchanger 11 to the tank 2. , A second temperature sensor 13 for detecting the temperature of the hot water heated by the hot water supply heat exchanger 11, energization of the heating element 7, driving / stopping of the circulation pump 10, and a flow control valve. 12
And a hot water supply control device 14 for controlling the opening degree of the hot water and heating the hot water in the tank 2 by the heating element 7 or the heat pump by the hot water supply heat exchanger 11.

Reference numeral 15 denotes an outdoor unit of the hot water supply system, which includes a compressor 16 for circulating a refrigerant through a refrigerant pipe 17 connected to the hot water supply heat exchanger 11, and electromagnetic valves 18a, 18b, 18c for opening and closing the refrigerant pipe 17. And expansion mechanism 1 for reducing the pressure of the refrigerant
9a, 19b, an outdoor heat exchanger 20 having a fan 21 for exchanging heat between the circulating refrigerant and the outside air, a four-way valve 22 for switching the circulation direction of the refrigerant, driving / stopping of the compressor 16, electromagnetic An outdoor control device 23 that controls opening and closing of the valves 18a, 18b, 18c, switching of the four-way valve 22, and the like, and circulates the refrigerant in a direction according to circumstances. Further, the outdoor control device 23 is electrically connected to the hot water supply control device 14 of the water heater 1 by a signal line, and data communication for exchanging respective information is performed between the two and the hot water supply control device 14.

[0004] Reference numeral 24 denotes a remote controller provided with a boiling setting section 24a for setting the boiling temperature of the water heater 1 to a desired temperature and a heating setting section 24b for setting the boiling temperature of the water heater 1; Is transmitted to the hot water supply control device 14 of the water heater 1. The set temperature of the boiling setting unit 24a is:
It can be set in units of 1 ° C. within the range of 55 ° C. to 90 ° C.
Reference numeral 25 denotes an indoor heat exchanger of the indoor unit which is connected to the refrigerant pipe 17 of the outdoor unit 15 and exchanges heat between the refrigerant and the indoor air to perform indoor cooling or the like.

In the hot water supply system configured as described above, the water depressurized by the pressure reducing valve 4 is supplied from the water supply pipe 3 into the tank 2 so that the tank 2 becomes full. Is set in the midnight power time zone (for example, from 23:00 midnight to 7
), The hot water supply control device 14 starts energizing the heating element 7, and the heating element 7 heats the hot water in the tank 2. Then, the hot water supply control device 14 generates the heating element 7 based on the detected temperature of the hot or cold water in the tank 2 detected by the first temperature sensor 8.
Is controlled to boil the water in the tank 2 to the set boiling temperature. During boiling, the expanded hot water is drained from the relief valve 6. Then, when the temperature detected by first temperature sensor 8 reaches the set boiling temperature, hot water supply control device 14 stops energization of heating element 7, and water heater 1 is in a state where hot water can be supplied from hot water supply pipe 5.

Here, the additional setting unit 2 of the remote controller 24
4b, when the additional heating is set, the hot water supply control device 14
Determines whether the detected temperature of the first temperature sensor 8 is, for example, 45 ° C. or higher, and if the detected temperature is lower than 45 ° C., determines that the hot and cold water in the tank 2 is out of hot water, and A heat pump heating request signal is transmitted to the tank 2, the flow control valve 12 is opened, and the circulating pump 10 is driven.
Conveyed to the top and circulated. In addition, the outdoor control device 23 that has received the heat pump heating request signal drives the compressor 16 to supply the high-temperature and high-pressure gas refrigerant to the hot water supply heat exchange via the refrigerant pipe 17 as shown by the solid arrow in FIG. To the vessel 11. The hot water passing through the hot water supply heat exchanger 11 on the hot water supply 1 side is heated and exchanged with the high temperature and high pressure gas refrigerant passing through the hot water supply heat exchanger 11 on the outdoor unit 15 side, and is heated by the second temperature sensor 13. The detected temperature of hot and cold water is 55 ° C., for example.
With the flow rate adjusted by the flow control valve 12 so that
It is sent to the upper part of the tank 2. At this time, if the flow control valve 12 is throttled, hot water is obtained. Further, the high-temperature and high-pressure gas refrigerant from the compressor 16 becomes a high-pressure liquid refrigerant by heat exchange of the hot water supply heat exchanger 11, becomes a low-pressure liquid refrigerant by the expansion mechanism 19b, and is sent to the outdoor heat exchanger 20, Further, the refrigerant becomes a low-pressure gas refrigerant by heat exchange with the outside air and is sent to the compressor 16.

When the temperature detected by the first temperature sensor 8 reaches 55 ° C., the hot water supply control device 14
To the heat pump heating stop signal and flow control valve 1
2 is closed and the circulation pump 10 is stopped. The outdoor control device 23 that has received the heat pump heating stop signal stops the compressor 16 and ends the heat pump heating. Then, the water heater 1 is heated to a completed state. Here, the case where the indoor heat exchanger 25 is not used is described.

[0008]

The hot water supply control device 14 of the conventional hot water supply system as described above, when the additional heating is set by the additional heating setting section 24b of the remote controller 24, sends an outdoor control device 23 a request for heat pump heating. Send a signal,
When the hot water heated by the hot water supply heat exchanger 11 reaches a predetermined temperature (55 ° C.), a signal to stop heat pump heating is transmitted to the outdoor control device 23. At this time, both 14,23
When a communication error occurs between the two, a signal such as a heat pump heating request is not transmitted to the outdoor control device 23, and the water heater 1 is not heated and the tank 2 runs out of water or the water is heated. However, there is a problem in that the outdoor unit 15 side remains in a state of increased boiling, which places a burden on the compressor 16 and the heat exchanger 12 for hot water supply and wastefully consumes electric power.

The hot water supply control device 14 and the outdoor control device 2
Even if the communication between the three units is normally performed and a signal such as a heat pump heating request is transmitted to the outdoor control device 23, for example, the compressor 16 on the side of the outdoor unit 15 rises in temperature for some reason and is provided therein. When an operation abnormality on the outdoor unit 15 side occurs, for example, when the operating thermostat is activated and the compressor 16 is not driven, the gas refrigerant flowing through the refrigerant pipe 17 is not sent to the hot water supply heat exchanger 11 and the hot water is heated by the heat pump. In some cases, the water heater 1 was not heated and the tank 2 was run out of water as in the case of a communication error.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. Even if a communication abnormality between a water heater and an outdoor unit or an operation abnormality on the outdoor unit side occurs, boiling of hot water by a heating element occurs. It is an object of the present invention to provide a hot water supply system capable of preventing the hot water supply from running out of water by adding water.

[0011]

A hot water supply system according to the present invention includes a hot water storage tank provided with a heating means therein, a circulation pump for circulating hot water in the hot water storage tank through a hot water pipe,
A hot water supply heat exchanger provided in a hot water supply pipe, a hot water supply device having a hot water supply control device for controlling the operation of the hot water supply to heat the hot water to a set boiling temperature, and a refrigerant connected to the hot water supply heat exchanger A compressor that circulates refrigerant through piping,
An outdoor unit having a plurality of valves provided in the refrigerant pipe, and an outdoor controller controlling the operation thereof and electrically connected to the hot water supply control device, and boiling water in the hot water storage tank with respect to the hot water supply control device A first abnormality detecting means for inputting and outputting various control signals including a setting of a temperature and a setting of increasing the amount of hot water to be supplied to the water heater, the first abnormality detecting means detecting a communication abnormality between the hot water supply control device and the outdoor control device; And an outdoor unit provided with second abnormality detection means for detecting abnormal operation of the compressor and the plurality of valves.

In the hot water supply system according to the present invention, when a communication abnormality or an operation abnormality is detected by the first abnormality detection means or the second abnormality detection means, the hot water is forcibly boiled by the heating means of the water heater. Things.

Further, in the hot water supply system according to the present invention, the hot water circulating in the hot water supply pipe is heat-exchanged with the refrigerant circulating in the refrigerant pipe by the hot water supply heat exchanger to heat the heat pump, and the boiling water is increased by the heat pump heating. In the case, when the communication abnormality or the operation abnormality is detected by the first abnormality detection means or the second abnormality detection means, the heating of the heat pump is interrupted and the heating means of the water heater forcibly increases the boiling water. It is.

Further, the hot water supply system according to the present invention is
The temperature of forcibly boiling or increasing the boiling water by the heating means of the water heater is set to a temperature higher than the boiling temperature set by the operation unit.

In the hot water supply system according to the present invention, when the communication abnormality between the hot water supply control device and the outdoor control device detected by the first abnormality detection means, the signal from the outdoor control device with respect to the transmission signal from the hot water supply control device is converted into the first signal. When the abnormality detecting means cannot detect the abnormality continuously for a plurality of times, it is determined that the abnormality is abnormal.

Further, at least one of the water heater, the outdoor unit and the operation unit is provided with a notifying means for notifying a communication abnormality or an operation abnormality detected by the first abnormality detecting means or the second abnormality detecting means. Things.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. FIG. 1 is a block diagram of a main part of the first embodiment of the present invention. The same parts as those in the conventional example described with reference to FIGS. 4 and 5 are denoted by the same reference numerals, and description thereof will be omitted. In the drawing, reference numeral 26 is electrically connected to the hot water supply control device 14 of the water heater 1 of the hot water supply system of FIG. 4, and detects a communication abnormality between the hot water supply control device 14 of the water heater 1 and the outdoor control device 23 of the outdoor unit 15. The first abnormality detection unit 27 is electrically connected to the compressor 16 of the outdoor unit 15, the solenoid valves 18a, 18b, 18c, the four-way valve 22, and the outdoor control device 23, and detects an operation abnormality of the compressor 16 and the like. This is a second abnormality detection unit that performs the operation. Then, in the present embodiment, when heating is performed in the midnight power time zone, or when heating is set by the heating setting unit 24b of the remote controller 24, the first abnormality detection unit 26 or the second abnormality detection unit 2 abnormality detection unit 27
When the communication abnormality between the hot water supply control device 14 and the outdoor control device 23 or the operation abnormality of the compressor 16 or the like is detected, the hot water supply control device 14 and the outdoor control device 23 perform the first abnormality detection unit 26 or the second abnormality detection. Based on the detection signal of the abnormality detecting section 27, the occurrence of communication abnormality or operation abnormality is detected, and the hot water in the tank 2 of the water heater 1 is set by the heating element 7 of the water heater 1 by the boiling setting section 24a of the remote controller 24. A predetermined maximum temperature, for example, 90
It was made to boil to ° C. The communication between the hot water supply control device 14 and the outdoor control device 23 is always performed. For example, even when the hot water in the tank 2 is heated to the set temperature in the midnight power time zone, the presence or absence of the abnormality from the outdoor unit 15 side Is communicated to the water heater 1 side.

Next, the operation of this embodiment will be described with reference to FIG.
This will be described with reference to the flowchart of FIG. First, water depressurized by the pressure reducing valve 4 is supplied from the water supply pipe 3 into the tank 2 so that the tank 2 becomes full, and a desired boiling temperature (set temperature t) is set by the boiling setting unit 24 a of the remote controller 24. When the time is set and it is the midnight power time zone (for example, from 23:00 to 7:00 in the next morning) (step 31 in FIG. 2), the hot water supply control device 14 of the water heater 1 operates the second abnormality detection unit 27 on the outdoor unit 15 side. The presence / absence of abnormality and the presence / absence of communication abnormality between the hot water supply control device 14 and the outdoor control device 23 by the first abnormality detection unit 26 are detected (step 32). And
If no abnormality is detected, the temperature of the hot and cold water in the tank 2 detected by the first temperature sensor 8 (detected temperature T1) is compared with the set temperature t (step 33), and the detected temperature T1 is set to the set temperature. If it is lower than t, the heating element 7 is energized to heat the water in the tank 2 (step 34),
Boiling to set temperature t. During boiling, the expanded hot water is drained from the relief valve 6. Then, the first temperature sensor 8
When the detected temperature T1 reaches the set temperature t, the hot water supply control device 14 stops the energization of the heating element 7 (step 35), and the water heater 1 enters a state where hot water can be supplied from the hot water supply pipe 5.

When the communication abnormality or the operation abnormality is detected by the first abnormality detecting section 26 or the second abnormality detecting section 27 (step 32), the hot water in the tank 2 is set to the boiling setting section of the remote controller 24. Regardless of the boiling temperature (set temperature t) set by 24a, heating is performed so as to be heated to a preset maximum temperature (predetermined maximum temperature t3), for example, 90 ° C. (steps 36 and 37). And
When the temperature rises to the predetermined maximum temperature t3, hot water supply control device 14 stops energization of heating element 7 (step 35), and water heater 1 enters a state in which hot water can be supplied from hot water supply pipe 5.

Outside the midnight power time zone (step 3
1), when the additional heating is set by the additional heating setting unit 24b of the remote controller 24 (step 38), the hot water supply control device 14 of the water heater 1 sets the detection temperature T1 of the first temperature sensor 8 to a predetermined temperature t1, for example, 45. It is determined whether the detected temperature T1 is equal to or higher than the predetermined temperature t1 (45 ° C). If the detected temperature T1 is equal to or higher than the predetermined temperature t1 (45 ° C), the water heater 1 is kept in a standby state without increasing the boiling water (step 31 ...). When the temperature is lower than the temperature t1, it is determined that the hot and cold water in the tank 2 is out of the hot water, and a signal of a heat pump heating request is transmitted to the outdoor control device 23 of the outdoor unit 15 to open the flow control valve 12 and circulate. By driving the pump 10, the hot and cold water in the lower part of the tank 2 is conveyed to the upper part of the tank 2 via the hot and cold piping 9 and circulated. At this time, the first abnormality detection unit 26
It is detected whether or not the communication between the controller and the outdoor controller 23 has been normally performed (step 40). When the communication has been normally performed, the heat pump is heated (step 41).

When the outdoor controller 23 receives the heat pump heating request signal, it closes the solenoid valves 18a and 18b and opens the solenoid valve 18c, and also drives the compressor 16 as shown by the solid arrow in FIG. Then, the high-temperature and high-pressure gas refrigerant is sent to the hot water supply heat exchanger 11 through the refrigerant pipe 17, and the hot water passing through the hot water supply heat exchanger 11 on the hot water supply 1 side and the hot water supply heat exchanger 11 on the outdoor unit 15 side. Heat is exchanged with the passing high-temperature and high-pressure gas refrigerant to warm the hot water. At this time, the detection temperature T of the hot and cold water detected by the second temperature sensor 13
The flow rate of the hot and cold water flowing through the hot and cold water pipe 9 is adjusted by the diversion adjusting valve 12 so that the temperature of the hot water 2 becomes a predetermined temperature t2, for example, 55 ° C. If the flow control valve 12 is further narrowed, hot water can be obtained. Further, the high-temperature and high-pressure gas refrigerant from the compressor 16 becomes a high-pressure liquid refrigerant by heat exchange of the hot water supply heat exchanger 11, becomes a low-pressure liquid refrigerant by the expansion mechanism 19b, and is sent to the outdoor heat exchanger 20, Further, the refrigerant is converted into a low-pressure gas refrigerant by heat exchange with the outside air, sent to the compressor 16, and circulates through the refrigerant pipe 17.

The detected temperature T of the first temperature sensor 8
When 1 reaches a predetermined temperature t2 (55 ° C.) (step 4
2), the hot water supply control device 14 transmits a heat pump heating stop signal to the outdoor control device 23 to close the flow control valve 12 and stop the circulation pump 10. In addition, the outdoor control device 23 that has received the heat pump heating stop signal.
Stops the compressor 16 and ends the heat pump heating (step 43). Then, the water heater 1 is heated to a completed state. In addition, although the case where the indoor heat exchanger 25 is not used is described here, the heat pump heating is performed by using the exhaust heat of the cooling in the indoor heat exchanger 25 without using the outdoor heat exchanger 20, Heat pump heating may be performed using both the outdoor heat exchanger 20 and the indoor heat exchanger 25 and utilizing a part of the exhaust heat of the cooling in the indoor heat exchanger 25.

When the additional water is set by the remote controller 24 and the hot water supply control device 14 determines that the hot and cold water in the tank 2 is out of water, and transmits a heat pump heating request signal to the outdoor control device 23, When the communication abnormality between the two 14 and 23 is detected by the first abnormality detection unit 26, or the operation abnormality of the compressor 16 and the like is detected by the second abnormality detection unit 27 (step 40), the hot water supply control device 14 closes the flow control valve 12 and stops the circulation pump 10 to interrupt heating of the heat pump, thereby forcibly energizing the heating element 7 in the midnight power time zone. Then, regardless of the boiling temperature (set temperature t) set by the boiling setting section 24a of the remote control 24,
The water heater 1 is heated so as to be heated to a predetermined maximum temperature t3 (90 ° C.) (steps 44, 36, and 37), and the water heater 1 is heated to a completed state. When the hot and cold water in the tank 2 rises to 90 ° C. at the predetermined maximum temperature t3, the hot water supply control device 14 stops energizing the heating element 7 (step 3).
5) The water heater 1 is in a state where hot water can be supplied from the hot water supply pipe 5.

Here, the detection of the communication abnormality in the first abnormality detecting section 26 is performed as follows. First, the error counter for counting the number of errors of the first abnormality detection unit 26 is in an initial (0) state (step 5 in FIG. 3).
0) For example, when a signal of a heat pump heating request is transmitted from the hot water supply control device 14 to the outdoor control device 23 (step 51), the first abnormality detection unit 26 responds to the signal from the hot water supply control device 14 by the outdoor control device 23. Is determined (step 52). And the outdoor control device 2
When there is a signal from the control unit 3, the parity check of the signal is performed (step 53). When there is no parity error, it is determined that the communication has been normally performed. Heat pump heating is performed based on the detection result at 26 (step 41 in FIG. 2). If there is no signal from the outdoor control device 23 (step 5
2) Or, when there is a signal parity error (step 53), it is determined that communication has not been performed normally, and the error counter is incremented to increase the number of errors by one (step 54). Then, when there is no signal from the outdoor control device 23 or there is a parity error continuously three times or more, that is, when the number of errors by the error counter becomes three or more (step 55), it is determined that a communication abnormality has occurred (step 56). ), The hot water supply control device 14 causes the heating element 7 to increase the boiling water based on the detection result by the first abnormality detection unit 26.

The second abnormality detecting section 27 monitors the operation state of the compressor 16 and the like during heat pump heating or during cooling using the indoor heat exchanger 25.
When the temperature rises in 6 and the thermostat provided therein is activated and the compressor 16 stops operating, the second abnormality detection unit detects an operation abnormality of the compressor 16 and the outdoor control device 23 outputs the second abnormality. An operation abnormality occurrence signal is transmitted to the hot water supply control device 14 based on the detection result of the abnormality detection unit. The hot water supply control device 14 that has received the operation abnormality occurrence signal forcibly energizes the heating element 7 in the midnight power time period to boil the water in the tank 2 to 90 ° C., which is the predetermined maximum temperature t3, as in the case of the communication abnormality. Raising the water heater 1 to a hot water supply enabled state. In the case of abnormal operation during heat pump heating,
Hot water supply control device 14 closes flow control valve 12, stops circulation pump 10, and interrupts heat pump heating.

As described above, when heating is performed in the midnight power time zone, or when heating is set by the heating setting unit 24b of the remote controller 24, the first abnormality detection unit 26 or the second abnormality detection unit 2 abnormality detection unit 2
7, when the communication abnormality between the hot water supply control device 14 and the outdoor control device 23 or the operation abnormality of the compressor 16 or the like is detected, the hot water supply control device 14 and the outdoor control device 23 Of the communication or operation abnormality is detected based on the detection result of the abnormality detection unit 27, and the hot water in the tank 2 of the water heater 1 is set by the heating unit 7 of the water heater 1 by the boiling setting unit 24a of the remote control 24. Set temperature t
Irrespective of the predetermined maximum temperature t3 (90
° C). Thereby, even if a communication abnormality and an operation abnormality occur, the water heater 1 is reliably heated or heated, and the occurrence of running out of water in the tank 2 can be prevented. Further, although the additional heating is performed, the outdoor unit 15 side remains in the increased boiling state and the compressor 16
There is no need to put a burden on the heat exchanger 11 for hot water supply or the like, and wasteful power consumption can be prevented. Further, in the case of a communication error, the absence of a signal from the outdoor control device 23 or the presence of a parity error is continuously determined three times or more.
That is, when the error count by the error counter becomes three or more, it is determined that a communication error has occurred. Therefore, an error due to an instantaneous malfunction such as noise can be easily removed, and the communication between the hot water supply control device 14 and the outdoor control device 23 Communication errors can be accurately detected.

Embodiment 2 FIG. The second embodiment is an embodiment in which the invention of the first embodiment is implemented in a hot water supply system compatible with a time-of-day light rate system. When the additional heating is set by the additional heating setting unit 24b, the first abnormality detecting unit 26 or the second abnormality detecting unit 2
7, a communication abnormality between the hot water supply control device 14 and the outdoor control device 23 or an operation abnormality of the compressor 16 or the like is detected, and the hot water supply control device 14 and the outdoor control device 23 detect the first abnormality detection unit 26 or the second abnormality detection. When the occurrence of communication abnormality or operation abnormality is detected based on the detection result of the unit 27, the hot water supply control device 14 forcibly energizes the heating element 7 by daytime electric power even during a time other than the midnight power time zone, and the hot water supply device 1 A predetermined maximum temperature t3 set in advance regardless of the set temperature t set by the boiling setting unit 24a of the remote controller 24.
(90 ° C.).

With such a configuration, substantially the same operation and effect as those of the first embodiment can be obtained, and the communication abnormality or the operation abnormality is detected by the first abnormality detecting section 26 or the second abnormality detecting section 27. Then, hot water supply control device 14 forcibly energizes heating element 7 by daytime electric power even during a time other than midnight power hours, and immediately raises the water in tank 2 of water heater 1 to a predetermined maximum temperature t3 (90 ° C.). . Thereby, even if a communication abnormality and an operation abnormality occur, the water heater 1 can be heated or heated, and the occurrence of running out of hot water in the tank 2 can be reliably prevented.

In the above-described embodiment, the case where the temperature of the heating by the heating element 7 at the time of detecting the communication abnormality or the operation abnormality is set to the predetermined maximum temperature t3 (90 ° C.) is described. The heating temperature may be variable by adding a fixed temperature (for example, 10 ° C.) to the set temperature t set by the boiling setting unit 24a. In this case, the constant temperature is 5 ° C. according to the use condition of hot and cold water.
It is preferable that the temperature is in the range of 30 ° C to 30 ° C.

Further, at least one of the remote controller 24, the water heater 1 and the outdoor unit 15 informs a user or the like of a communication abnormality or an operation abnormality detected by the first abnormality detecting section 26 or the second abnormality detecting section 27. You may provide the notification means to be known. The notification means in this case is, for example, an error display on the remote controller 24 or a buzzer, and various mechanisms can be applied.

[0031]

As described above, the hot water supply system according to the present invention comprises a hot water storage tank provided with a heating means therein, a circulation pump for circulating hot water in the hot water storage tank through a hot water pipe, and a hot water supply provided in the hot water pipe. Circulating a refrigerant through a water heater having a heat exchanger for controlling hot water supply and a hot water supply control device for controlling the operation thereof to bring hot water to a set boiling temperature, and a refrigerant pipe connected to the heat exchanger for hot water supply An outdoor unit having a compressor, a plurality of valves provided in a refrigerant pipe, and an outdoor control device electrically controlling the hot water supply control device by controlling the operation thereof, and a hot water supply control device in the hot water storage tank. An operation unit for inputting and outputting various control signals including a setting of a hot water boiling temperature and a setting of additional hot water boiling is provided, and the water heater is configured to detect a communication abnormality between the hot water supply control device and the outdoor control device. Provided with the abnormality detection means,
The outdoor unit is provided with the second abnormality detecting means for detecting the abnormal operation of the compressor and the plurality of valves, so that the communication abnormality or the abnormal operation can be reliably detected, and the burden on the water heater and the outdoor unit is reduced. Thus, an economical hot water supply system that can prevent wasteful consumption of electric power can be obtained.

In the hot water supply system according to the present invention, when the communication abnormality or the operation abnormality is detected by the first abnormality detecting means or the second abnormality detecting means, or when the hot and cold water circulating through the hot and cold water piping is supplied to the hot water supply system, In the case where the heat pump is heated by exchanging heat with the refrigerant circulating through the refrigerant pipe by the exchanger, and the boiling water is increased by the heat pump heating,
When the communication abnormality or the operation abnormality is detected by the first abnormality detection means or the second abnormality detection means, the heat pump heating is interrupted and the hot water is heated or heated by the heating means of the water heater. In addition, the boiling water can be surely heated or heated more, so that the hot water storage tank can be prevented from running out of hot water.

Further, the hot water supply system according to the present invention comprises:
The temperature of the hot water forcibly heated or increased by the heating means of the water heater is set to a temperature higher than the boiling temperature set by the operation unit. It is possible to prevent running out of hot water and to obtain a convenient hot water supply system.

In the hot water supply system according to the present invention, when a communication abnormality between the hot water supply control device and the outdoor control device detected by the first abnormality detection means is detected, a signal from the outdoor control device with respect to a transmission signal from the hot water supply control device is transmitted to the first control unit. When the abnormality detection means fails to detect multiple times consecutively, it is determined to be abnormal, so it is possible to accurately detect communication abnormalities except for instantaneous malfunctions such as noise, and to reliably prevent running out of hot water tanks. it can.

Further, at least one of the water heater, the outdoor unit and the operation unit is provided with a notifying means for notifying a communication abnormality or an operation abnormality detected by the first abnormality detecting means or the second abnormality detecting means. Therefore, the user can easily and surely know the communication abnormality or the operation abnormality, and can prevent the hot water tank from running out of water and obtain an easy-to-use hot water supply system.

[Brief description of the drawings]

FIG. 1 is a block diagram of a main part of a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating the operation of the first embodiment of the present invention.

FIG. 3 is a flowchart illustrating the operation of the first embodiment of the present invention.

FIG. 4 is a schematic diagram of a heat pump type hot water supply system.

FIG. 5 is a block diagram of a main part of FIG. 4;

[Explanation of symbols]

REFERENCE SIGNS LIST 1 hot water heater, 2 tank, 7 heating element, 8 first temperature sensor, 9 hot water piping, 10 circulation pump, 11 hot water supply heat exchanger, 14 hot water supply control device, 15 outdoor unit, 16
Compressor, 17 refrigerant pipe, 18a, 18b, 18c
Solenoid valve, 224 way valve, 23 outdoor control device, 24 remote controller, 24a heating temperature setting unit, 24b heating increase setting unit, 26 first abnormality detection unit, 27 second abnormality detection unit.

Claims (6)

[Claims] 1. A hot water storage tank provided with a heating means inside, a circulation pump for circulating hot water in the hot water storage tank through a hot water pipe, a hot water supply heat exchanger provided in the hot water pipe, and an operation of these. A water heater having a hot water supply control device for controlling and boiling water to a set boiling temperature, a compressor for circulating a refrigerant through a refrigerant pipe connected to the heat exchanger for hot water supply, and a compressor provided in the refrigerant pipe A plurality of valves, and an outdoor unit having an outdoor control device that controls the operation thereof and is electrically connected to the hot water supply control device; and a boiling temperature of hot water in the hot water storage tank with respect to the hot water supply control device. And an operation unit for inputting / outputting various control signals including a setting of water supply and a setting of increasing the amount of hot water, and a first abnormality detecting communication abnormality between the hot water supply control device and the outdoor control device in the water heater. A hot water supply system comprising: an abnormality detection unit; and a second abnormality detection unit for detecting an operation abnormality of the compressor and the plurality of valves in the outdoor unit. 2. The method according to claim 1, wherein when a communication abnormality or an operation abnormality is detected by the first abnormality detection means or the second abnormality detection means, the hot water is forcibly boiled by the heating means of the water heater. The hot water supply system according to claim 1. 3. When the hot water circulating in the hot water supply pipe is heat-exchanged with the refrigerant circulating in the refrigerant pipe by the hot water supply heat exchanger to heat the heat pump, and the heat pump heating increases the boiling water, When the communication abnormality or the operation abnormality is detected by the first abnormality detection means or the second abnormality detection means, the heating of the heat pump is interrupted and the heating means of the water heater forcibly increases the boiling water. The hot water supply system according to claim 1, wherein 4. The method according to claim 2, wherein the temperature of the forcible boiling or additional boiling of the hot water by the heating means of the water heater is set to a temperature higher than the boiling temperature set by the operation unit. 3. The hot water supply system according to 3. 5. A communication abnormality between the hot water supply control device and the outdoor control device detected by the first abnormality detection means, wherein a signal from the outdoor control device with respect to a transmission signal from the hot water supply control device is detected by the first abnormality detection. 5. The hot water supply system according to claim 1, wherein an abnormality is determined when the means cannot be detected a plurality of times in succession. 6. An informing means for informing at least one of the water heater, the outdoor unit and the operation unit of a communication abnormality or an operation abnormality detected by the first abnormality detecting means or the second abnormality detecting means. The hot water supply system according to claim 1, 2, 3, 4, or 5, wherein