JPH02166351A - Heat pump type cooling, heating and hot water supply device - Google Patents

Abstract

PURPOSE:To enable an efficient hot water supply to be attained even in case of carrying out a heating operation during winter season by a method wherein hot water discharging port pipes of each of hot water accumulation tanks of a plurality of cooling and heating hot water suppliers are connected to each of connecting pipes and hot water supplying pipes through a plurality of solenoid valves and then a giving or receiving of hot water between a plurality of cooling and heating hot water suppliers are controlled. CONSTITUTION:Hot water discharging port pipes 4 of each of hot water accumulation tanks 1 of a plurality of cooling and heating hot water suppliers A, B, C, D and E are connected in parallel with connector piping 2 through a first solenoid valve 5 and a second solenoid valve 6. The hot water supplying piping 3 is connected to the hot water discharging pipe 4 through the first solenoid valve 5 and then connected to a connector pipe 2 through the second solenoid valve 6. A giving or receiving of hot water between the cooling and heating hot water suppliers is controlled under an operating or closing operation of each of the solenoid valves 5 and 6 in response to a state of hot water within each of the hot water tanks 1. A hot water feeding operation of the cooling or heating hot water feeder under a severe operating condition can be accommodated between each of the cooling or heating hot water suppliers by utilizing an entire tank capacity of the device.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a heat pump type air-conditioning/heating/water heater, and particularly relates to a heat pump type air-conditioning/heating/water heater configured by connecting a plurality of air-conditioning/heating/water heaters in parallel. .

[Prior Art] FIG. 3 is an overall configuration diagram showing a conventional heat pump type air-conditioning/heating/water supply device disclosed in Japanese Patent Laid-Open No. 59-180227.

In the figure, (1) is a hot water storage tank that stores hot water, (11
) is the outdoor unit of this heat pump air conditioning/heating/water heater, (12) is the hot water exchange unit, (13)
is an indoor unit. (11a) is a compressor that compresses the refrigerant, (11b) and (11C) are four-way valves that switch the refrigerant circulation route depending on the operation such as hot water supply operation or air conditioning operation, and (11d) is the connection between the refrigerant and outside air. (11e) to (11Q) are solenoid valves that are interposed in the refrigerant piping and open and close as appropriate depending on each operating state; (llh) is the outdoor heat exchanger (11d);
) is an outdoor fan that promotes heat exchange. The outdoor fan (llh) is connected to the compressor (11a) by a refrigerant pipe to constitute an outdoor unit (11). (12
(a) is a hot water heat exchanger that exchanges heat between refrigerant and hot water, and (12b) is a pump for hot water circulation. The hot water heat exchanger (12a) and the pump (12b) constitute a hot water exchange unit (12). (13a) is an indoor heat exchanger that exchanges heat between refrigerant and indoor air; (13b)
is an indoor fan that blows and circulates hot or cold air indoors. This indoor heat exchanger (13a) and indoor unit (13)
and constitute an indoor unit (13).

The conventional heat pump type air-conditioning/heating-water supply device is configured as described above, and can perform both hot-water supply operation and cooling/heating operation as appropriate. Each operation of this heat pump type air-conditioning/heating/water supply device will be explained below.

In the case of summer cooling operation, a refrigerant circulation cycle is formed in which the hot water heat exchanger (12a) functions as a condenser and the indoor heat exchanger (13a) functions as an evaporator.

This cycle is formed by operating the four-way valves (11b), (llc) and the solenoid valve (110). In this operating state, the pump (12b) and indoor fan (13b)
are also operated at the same time. Therefore, the room is cooled by cold air, and at the same time, the hot water storage tank (1) stores hot water that is heated using waste heat from the condensation of the refrigerant.

On the other hand, in the case of winter heating operation, a refrigerant circulation cycle is formed in which the hot water heat exchanger (12a) functions as an evaporator when the outside air temperature is low and heating starts slowly. This cycle is formed by operating the four-way valves (llb), (llc) and the solenoid valve (11e). Then, the heating operation is performed using the hot water temperature in the hot water storage tank (1).

The above heat pump type air conditioning/heating/water heating system has a hot water storage tank (1
), an outdoor unit (11), a hot water exchange unit (12), and an indoor unit (13).

In addition to heating and cooling operation, hot water supply operation can also be performed. In addition to the above, there is also a heat pump type air-conditioning, heating and hot-water supply system that can operate heating and hot water at the same time.
No. 368.

However, there are also devices intended only for hot water supply operation without air-conditioning operation. FIG. 4 is an overall configuration diagram showing a conventional water heater disclosed in Japanese Unexamined Patent Publication No. 59-21939.

In the figure, (1) is a hot water storage tank, (2) is a connection pipe that connects each hot water storage tank (1), (17) is a water supply pipe that supplies water to each hot water storage tank (1), and (19) is a water supply A solenoid valve is installed between the piping (17) and each hot water storage tank (1), (20) is a heating burner that heats the water, and (21) is a heating burner that heats the water depending on the temperature state of the hot water in the hot water storage tank (1). Solenoid valve (19)
This is a temperature switch that controls the opening and closing operations of the (IA), (
IB) and (IC) are hot water boilers, and a plurality of these hot water boilers (IA), (IB), and (IC) are connected in parallel to constitute one water heater as a whole.

In the conventional water heater configured as described above, hot water is stably supplied by appropriately controlling the opening and closing operations of each electromagnetic valve (19). This operation will be explained below.

Each hot water boiler (IA), (IB), connected in parallel
When the amount of hot water in one of the hot water storage tanks (1) of the (IC) decreases and the temperature of the hot water storage tank (1) drops, the temperature switch (21) installed in the hot water storage tank (1)
operates to close the solenoid valve (19). and,
The inflow of water from the water supply pipe (17) to the hot water storage tank (1) is stopped, and the outflow of hot water from the hot water storage tank (1) is also stopped. Thereafter, as the hot water in the hot water storage tank (1) is sufficiently heated, the electromagnetic valve (19) becomes open again. Note that while hot water stops flowing out from the hot water storage tank (1), hot water is supplied from another hot water storage tank (1).

In this way, the conventional hot water supply system may be a heat pump type air conditioning/heating water supply system consisting of a single mechanism having only one set of each component such as a hot water storage tank (1) as shown in FIG. As shown in , there is also a heat pump type air-conditioning/heating/water supply system that has a plurality of hot water storage tanks (1) and the like by connecting a plurality of single mechanisms.

[Problems to be Solved by the Invention] In the conventional heat pump type air-conditioning/heating water supply system as described above, as shown in FIG.
1), hot water exchange unit (12), and indoor unit (13)
It was constructed as a single air-conditioning/heating/water heater with one each.

However, when used as a single cooling/heating/water heater like this type of heat pump type cooling/heating/water heater, the capacity of the hot water storage tank (1) is required to be about 300 [1].

Therefore, the installation space for the hot water storage tank (1) becomes large, which is particularly inconvenient when installing it in a small hotel or the like.

Furthermore, when a large amount of hot water is used due to continuous hot water supply or the like and the hot water in the hot water storage tank (1) is used up, it is necessary to wait until the hot water is boiled again, and hot water cannot be supplied during that time.

Moreover, heating operation capacity decreases in winter, so when hot water supply and heating are operated simultaneously, it is necessary to perform controls such as prioritizing hot water supply operation during the day and heating operation at night.

In addition, in a water heater that has multiple hot water storage tanks (1) by connecting multiple single air-conditioning/heating water heaters as shown in Figure 4, hot water supply operation is performed by the whole water heater, so it is difficult to operate on a small scale. When installed in a hotel, etc., it was not possible to independently supply hot water to each room. For this reason, when the amount of remaining hot water in the hot water storage tank (1) of each room all falls below the specified value, a situation has arisen in which hot water cannot be supplied even if it is urgently desired to supply hot water in the - room.

Therefore, this invention can reduce the tank capacity, support continuous hot water supply operation, provide efficient hot water supply operation even when heating operation is required in winter, and moreover, when installed in small hotels etc. The object of the present invention is to provide a heat pump type air-conditioning/heating/water supply device that can independently supply hot water to each room.

[Means for Solving the Problems] A heat pump type air-conditioning/heating water supply device according to the present invention includes a hot water storage tank (1), an outdoor unit (11), and a hot water exchange unit (
12) and an indoor unit (13).

(C), (D), (E), and the plurality of air-conditioning/heating water heaters (
The hot water outlet piping (4) of each hot water storage tank (1) of A), (B), (C), (D), and (E) is connected to the first solenoid valve (5) and the second solenoid valve (6). connecting pipes (2) that are connected in parallel through the connecting pipes (2), which are connected to the hot water outlet pipe (4) via the first solenoid valve (5), and the second solenoid valve (6).
A hot water supply pipe (3) connected to the connecting pipe (2) via a first solenoid valve (5) and a second solenoid valve (6) depending on the state of hot water in each hot water storage tank (1) ), the plurality of air-conditioning/heating/water heaters (A).

(B), (C), (D), and (E) A control device (7) that controls the exchange of hot water between each other.

[Function] In the heat pump type air-conditioning/heating water supply device of the present invention,
Multiple air conditioning/heating/water heaters (A), (B).

The hot water outlet piping (4) of each hot water storage tank (1) of (C), (D), and (E) is connected to the first solenoid valve (5) and the second solenoid valve (6).
) are connected in parallel with the connecting pipes (2), and the hot water supply pipe (3) is connected to the hot water outlet pipe (4) via the first solenoid valve (5).
), and is also connected to the connecting pipe (2) via the second solenoid valve (6), and the control device (7) controls the first The opening and closing operations of the solenoid valve (5) and the second solenoid valve (6) are controlled to provide hot water between the multiple air conditioning/heating water heaters (A), (B), (C), (D), and (E). Since the system controls the delivery and reception of hot water, even if the individual tank capacity of each hot water storage tank (1) is small, the tank capacity of the entire device is large. Then, each air conditioning/heating water heater (A), (B
), (C), (D).

(E) Continuous hot water supply operation is possible because the hot water supply operation of the air conditioning/heating water heater under severe operating conditions can be compensated for, and hot water supply operation and heating operation can be performed at the same time even when heating operation is required in winter or the like. Furthermore, each air conditioning/heating water heater (A), (B),
It is also possible to operate each of (C), (D), and (E) independently.

[Embodiment] FIG. 1 is an overall configuration diagram showing a heat pump type air-conditioning/heating/water supply apparatus which is an embodiment of the present invention. In the figure, (1), (
2), (11) to (13), and (17) are the same or equivalent to the components of the conventional example, so redundant explanations will be omitted here.

In the figure, (A), (B), (C), (D) and (E
) is a single air-conditioning/heating water heater having a hot water storage tank (1), an outdoor unit (11), a hot water exchange unit (12), and an indoor unit (13).

(1) is a hot water storage tank with an internal capacity of 150 [mm], (3) is each air conditioning/heating water heater (A), (B), (C), (D) (E)
) is the hot water supply pipe, and (4) is the hot water outlet pipe that is directly connected to the hot water storage tank (1). And this hot water outlet piping (
4) is connected to the connection pipe (2) and the hot water supply pipe (3). (5) and (6) are first and second solenoid valves, and the first solenoid valve (5) connects the hot water outlet pipe (4) and the hot water supply pipe (
3), and the second solenoid valve (6) is interposed between the hot water outlet pipe (4) and the connection pipe (2). (
7) is a control device that appropriately controls the opening and closing operations of the first solenoid valve (5) and the second solenoid valve (6) according to the state of hot water in each hot water storage tank (1), and (8) is a control device Control wiring for exchanging signals between (7) and each control mechanism, (9) and (
10) is a hot water storage tank (1) and hot water exchange unit (12)
The connecting pipes (14) and (15) connect the outdoor unit (1
A refrigerant pipe (16) connects the indoor unit (1) and the indoor unit (13), and (16) is a hot water faucet attached to the tip of the hot water pipe (3).

(17) is a water supply pipe that supplies tap water etc. to the hot water storage tank (1) and also applies pressure inside the hot water storage tank (1);
8) is a thermistor that senses the temperature of hot water in the hot water storage tank (1).

The heat pump type air-conditioning/heating water supply system of this embodiment is configured as described above, including a hot water storage tank (1), an outdoor unit (11), and an outdoor unit (11).
), a single air-conditioning/heating water heater (A), (B), (C) each having a hot water exchange unit (12) and an indoor unit (13),
A plurality of (D) and (E) are provided. And each of these air conditioning/heating/water heaters (A), (B), (C), (D), (E)
are connected in parallel through connecting pipes (2). In addition,
The cooling operation and heating operation of the heat pump type air-conditioning/heating/hot-water supply apparatus of this embodiment are well-known operations. Therefore, here, the hot water supply operation will be explained using the flowchart shown in FIG. 2.

FIG. 2 is a flowchart showing an example of a hot water supply control operation by a heat pump type air conditioning/heating hot water supply apparatus according to an embodiment of the present invention. This figure shows a hot water supply control subroutine, which is started when a predetermined signal is manually input from the thermistor (18) to the control device (7). Hereinafter, a heating/cooling water heater (A) will be described as an example.

First, in step S1, it is determined whether the remaining amount of hot water in the hot water storage tank (1) of the air conditioning/heating water heater (A) is 50 [9] or more. This judgment is based on the use of hot water.
Is the amount of hot water in the hot water storage tank (1) decreasing and the value input from the thermistor (18) installed near the upper part 50 [view] capacity of this hot water storage tank (1) is a value lower than the set temperature? will be judged. Note that the set amount of remaining hot water is set to 50 [ul] for each of the air-conditioning and heating water heaters (A), (B), and (C) that share a plurality of hot water storage tanks (1).

This is because the difference in operating time between (D) and (E) is taken into consideration. The remaining amount of hot water in the hot water tank (1) is 50 [
Q] In the following cases, in step S2, other air conditioning/heating/water heater (
It is determined whether hot water remains in the hot water storage tanks (1) of B), (C), (D), and (E). Other hot water storage tanks (1
), the first solenoid valve (5) of the air-conditioning/heating/water heater (A) is closed and the second solenoid valve (6) is opened in step S3. In this state, other hot water storage tanks (
The remaining hot water from step 1) is supplied to the hot water supply pipe (3) of the air conditioning/heating water heater (A) via the connecting pipe (2) and the second solenoid valve (6). In addition, if there is no hot water remaining in the other hot water storage tank (1), the first solenoid valve (5) of the air conditioning/heating water heater (A) is opened in step S4, and the second solenoid valve (6) is opened. Close. In this state, the hot water storage tank (1
) Hot water supply operation is possible until the remaining hot water in the tank is used up. After the operation in step S3 or step S4, the process advances to step S7 and moves on to the next control operation. On the other hand, if in step S1 the remaining amount of hot water in the hot water storage tank (1) of the air conditioning/heating water heater (A) is 50 [21 or more, in step S5 the first electromagnetic valve (5) of the air conditioning/heating water heater (A) is activated.
and the second solenoid valve (6) are both opened. In this state, the remaining hot water in the hot water storage tank (1) of the air conditioning/heating water heater (A) can be used while the other air conditioning/heating/water heaters (B) and (C).

The remaining hot water in the hot water storage tank (1) in (D) and (E) can also be used. After that, the process proceeds to step S6, and the heating/cooling water heater (A
) is determined whether the remaining amount of hot water in the hot water storage tank (1) is 150 [91 or more. 150 [91 or more, the hot water supply flag of the air-conditioning/heating water heater (A) is reset in step S12, and then this routine ends. In this state, there is no need to perform any special control during the hot water supply operation of the air conditioning/heating water heater (A).

Moreover, if it is 150 [Q] or less, the process advances to step S7 and shifts to the next control operation. In this state, the air conditioner/heater/water heater (
This is because there may be a need to perform control during the hot water supply operation in A). In step S7, as a prelude to the next control operation, it is determined whether the heating request flag of the air-conditioning/heating/water heater (A) is set. If the heating request flag is not set, the hot water supply flag of the air conditioning/heating water heater (A) is set in step S9, and then this routine ends. This is because in this state, the air-conditioning/heating water heater (A) does not need to perform a heating operation, and is operated only in the hot water supply operation mode. On the other hand, if the heating request flag is set, in step S8, other air-conditioning/heating water heaters (B)
, (C), (D), and (E) are not used. All heating, cooling, and water heaters (A).

If (B), (C), (D), and (E) are in use, the hot water supply flag of the air-conditioning/heating water heater (A) is set in step S9, and this routine ends.

In this state, the air-conditioning/heating water heater (A) must control the heating operation and hot water supply operation by itself without the help of other air-conditioning/heating/water heaters (B), (C), (D), or (E). It won't happen. In addition, several other air conditioning/heating/water heaters (B), (C),
If any of (D) and (E) is not used, the hot water flag of the other air conditioning/heating water heater is set in step 310, and the hot water supply flag of the other air conditioning/heating water heater (A) is set in step Sll.
This routine ends by setting the hot water supply flag that gives priority to heating. In this state, the air-conditioning/heating water heater (A) is operated in a hot water supply mode giving priority to heating, and the hot water supply operation is performed intermittently only for an appropriately set time during the heating operation. In addition, in each operation of the air-conditioning/heating water heater (A), it is possible to borrow help from other air-conditioning/heating/water heaters that are not in use.

As mentioned above, in the heat pump type air-conditioning/heating-water heater of this embodiment, a plurality of single air-conditioning/heating/water heaters (A), (B),
The hot water outlet piping (4) of each hot water storage tank (1) of (C), (D), and (E) is connected to the first solenoid valve (5) and the second solenoid valve (6).
) are connected in parallel with the connecting pipes (2), and the hot water supply pipe (3) is connected to the hot water outlet pipe (4) via the first solenoid valve (5).
), and is also connected to the connecting pipe (2) via the second solenoid valve (6), and the control device (7) controls the first The opening and closing operations of a solenoid valve (5) and a second solenoid valve (6) are controlled, and a plurality of air-conditioning/heating water heaters (A) and (B) are provided.

(C), (D), and (E) control the exchange of hot water between them.

Therefore, even if the individual tank capacity of each hot water storage tank (1) is small, the tank capacity of the entire device is large. And each air-conditioning/heating water heater (A), (B).

(C), (D), and (E) can compensate for the hot water supply operation of the heating/cooling water heater under severe operating conditions, allowing continuous hot water supply operation that uses a large amount of hot water. In addition, when heating operation is required in winter, etc., other air-conditioning/heating/water heaters (A), (B), (C)
, (D), and (E), hot water supply operation and heating operation can be performed at the same time.

Furthermore, each air conditioning/heating water heater (A), (B), (C).

It is also possible to operate each of (D) and (E) independently.

As a result, each hot water storage tank (1) requires a small installation space, which is particularly convenient when installed in a small hotel or the like. Furthermore, a large amount of hot water can be used by continuous hot water supply, etc., and the hot water in the hot water storage tank (1) is less likely to be used up as in the past, and there is no need to boil water more than necessary, making it more efficient. Hot water operation becomes possible. Moreover, even when the heating operation capacity is reduced in winter, etc., hot water supply and heating can be operated simultaneously, and efficient hot water supply operation is possible. Furthermore, when installed in a small hotel, etc., hot water supply operation can be performed independently for each room, so hot water supply requests can be handled only in the - room, and hot water supply operation can be performed more efficiently.

By the way, in the above embodiment, the case where the operation is appropriately controlled according to the amount of hot water remaining in each hot water storage tank (1) has been explained, but it is also possible to control the operation according to the state of hot water in each hot water storage tank (1). For example, the operation may be appropriately controlled depending on the temperature of the hot water in the hot water storage tank (1).

[Effects of the Invention] As explained above, the heat pump type air-conditioning/heating water heater of the present invention connects the hot water outlet piping of each hot water storage tank of a plurality of air-conditioning/heating water heaters through the first solenoid valve and the second solenoid valve. They are connected in parallel, and the hot water supply pipe is connected to the hot water outlet pipe through the first solenoid valve, and also connected to the connecting pipe through the second solenoid valve, depending on the state of hot water in each hot water storage tank. By controlling the opening and closing operations of the first solenoid valve and the second solenoid valve using a control device, and controlling the exchange of hot water between multiple air conditioning/heating water heaters, the individual tank capacity of each hot water storage tank can be reduced. However, since the tank capacity of the entire device is large, the installation space for each hot water storage tank is small. In addition, since the hot water supply operations of the cooling, heating, and water heaters that are under severe operating conditions can be compensated for between each cooling, heating, and water heater, it is possible to cope with continuous hot water supply operation that uses a large amount of hot water. Since heating operation and hot water supply operation can be performed at the same time, efficient hot water supply operation is possible. Furthermore, it is now possible to operate each air-conditioning/heating water heater independently, and when installed in a small hotel, etc., it is possible to operate the hot water supply independently for each room, resulting in efficient hot water supply operation. .

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing a heat pump type air-conditioning/heating/water supply device which is an embodiment of the present invention, and FIG. FIG. 3 is an overall configuration diagram showing a conventional heat pump type air-conditioning/heating water supply device, and FIG. 4 is an overall configuration diagram showing a conventional hot water supply device. In the diagram, 1: Hot water storage tank 2: Connecting pipe 3: Hot water supply pipe
4: Lifting pipe 5: First solenoid valve 6
2 Second solenoid valve 7: Control device 11: Outdoor unit 12: Hot water exchange unit 13 2 Indoor units A, B, C, D
, E: Air conditioning/heating/water heater. In the drawings, the same reference numerals and the same symbols indicate the same or equivalent parts.

Claims (1)

[Scope of Claims] A plurality of air conditioning/heating water heaters each having a hot water storage tank, an outdoor unit, a hot water exchange unit, and an indoor unit; and a hot water outlet pipe of each hot water storage tank of the plurality of air conditioning/heating water heaters is connected to a first solenoid valve and a first solenoid valve. connection pipes connected in parallel through two solenoid valves; and a hot water supply connected to the hot water outlet pipe through the first solenoid valve and to the connection pipe through the second solenoid valve. control for controlling opening/closing operations of a first solenoid valve and a second solenoid valve according to the state of hot water in each of the hot water storage tanks, and controlling transfer of hot water between the plurality of air conditioning/heating water heaters; A heat pump type air-conditioning/heating/water heating device characterized by comprising: