JPS5926222B2 - Heat pump air conditioning system with hot water supply system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat pump air-conditioning system with a hot water supply device that can efficiently perform hot water supply, cooling, and heating operations using only a single refrigeration thread without requiring an auxiliary heat source.

Conventional devices of this kind, which can perform hot water supply, cooling, and heating operations using a single refrigeration thread, can only use either the heating priority hot water supply method or the hot water priority heating method when operating heating and hot water supply simultaneously. I couldn't do it.

Those that adopt the former method have the disadvantage of wasting heat equivalent to the temperature rise of hot water for heating when heating is not needed; Both methods had the disadvantage that the temperature increase of the hot water was wasted, and both systems resulted in a large loss of heat and could not be operated efficiently.

However, the reason why it has not been possible to obtain a dual-use system capable of switching between the two systems as required is due to the following reason.

In other words, when the heating priority hot water supply system and the hot water priority heating system are combined using a single-refrigeration thread, the hot water pump and the cold/hot water pump for heating are in constant operation, and in the case of the former system, the hot water supply system is When the temperature is low, the amount of condensed heat is consumed exclusively for heating hot water, reducing the heating capacity.On the other hand, in the case of the latter method, the problem is that the hot water supply capacity conversely decreases.

One possible way to eliminate this drawback is to stop the pump on the side where C is not required, but this would cause the water temperature on the side where the pump is stopped to rise too much, creating a dangerous situation and forcing a complete stop of operation. .

For example, in a heating-priority water heating system, when the hot water pump is stopped, the temperature inside the hot water heat exchanger (a heat exchanger that exchanges heat between discharged gas and water) rises to approximately 100 to 130°C, causing steam to form. This can lead to inconveniences such as oxidation.

The present invention focuses on the above-mentioned conventional problems, and enables switching operation between the two types at any time, and avoids a dangerous situation such as an excessive rise in temperature of one of the types. We have devised a multipurpose heat pump type air-conditioning system that can easily switch between six operating modes that meet the requirements of A heat pump refrigeration circuit is configured by a heat exchanger on the side, a pressure reducer, a heat exchanger on the heat source side, and a water-to-water heat exchanger for hot water supply interposed in the discharge pipe connecting the compressor and the four-way switching valve. In addition, the heat exchanger on the user side is equipped with a supply device for a heat medium that exchanges heat with the heat exchanger, and the water side of the water-to-water heat exchanger for hot water supply and the hot water storage tank are connected by piping via a hot water pump. Electric circuits related to the compressor, four-way switching valve, supply device, and hot water pump that are connected to form a hot water circulation circuit. ◎Operation mode selection circuit: Cooling, hot water priority cooling, hot water priority heating, heating A switching circuit consisting of a selection switch mechanism that selects and commands six types of operation modes: priority hot water supply, heating, and hot water supply; ◎Compressor drive circuit section; When the temperature is above a predetermined temperature, hot water priority cooling mode is selected, and when the cold water in the cold/hot water circulation circuit is above a predetermined temperature, but the hot water in the hot water circulation circuit is below a predetermined temperature, hot water priority heating mode or heating priority hot water supply mode is activated. When the hot water temperature in the hot and cold water circulation circuit is below a predetermined temperature, or when the hot water in the hot water circulation circuit is below a predetermined temperature, and when the mode is heating mode and the hot water in the cold and hot water circuit is below a predetermined temperature, A circuit that drives the compressor in hot water supply mode and when hot water in the hot water circulation circuit is below a predetermined temperature; ◎ Refrigeration cycle switching circuit; when the operation mode selection circuit is in cooling mode and In the priority cooling mode, the four-way selector valve is activated to cool the air in each state: when the hot water in the hot water circulation circuit is above a predetermined temperature, or when the hot water is below a predetermined temperature and the cold water in the cold/hot water circulation circuit is above a predetermined temperature. and a switching circuit that operates the four-way switching valve to the heating side in each state other than the above-mentioned states.

◎Supplier drive circuit unit: When the operation mode selection circuit unit is in hot water priority cooling mode, when the cold water in the cold/hot water circulation circuit is below the set temperature and the hot water in the hot water circulation circuit is below a predetermined temperature, the hot water supply priority heating mode is selected. and when the hot water in the hot water supply circulation circuit is at a predetermined temperature or lower and in the hot water supply mode, the heat medium supply device is stopped in each state of 7, and the supply device is stopped in each state other than the above-mentioned states. Circuits to be operated: ◎ Hot water pump drive circuit section; , the hot water supply pump is stopped in each state when the hot water in the hot water supply circulation circuit does not reach the dangerous temperature in the heating mode, and the hot water supply pump is operated by the compressor in each state other than the above each state. It is characterized by consisting of a circuit that starts and stops, and each circuit section.

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

FIG. 1 and FIG. 2 are device circuit diagrams related to the heat pump type air conditioning system of the present invention, in which a compressor 1, a four-way selector valve 2 for switching between a cooling/cooling cycle and a heating cycle, and a cooling cycle and a heating cycle are shown. A water-to-water type heat exchanger 3 (hereinafter referred to as the user-side coil 3) on the user side that switches between the evaporator and the condenser and acts on the evaporator and condenser, respectively, two check valves 6, and one shuttle valve. Rectifier circuit with elements 7 and temperature-sensitive automatic expansion valve 5
an air-to-air type heat exchanger 8 (hereinafter referred to as heat source side coil 8) which serves as a heat source side that switches between acting as a condenser and an evaporator during the cooling cycle and special heating cycle, respectively. The liquid receiver 9, the accumulator 10, and the dryer 11 constitute a reversible refrigeration circuit.

The above device further includes a heat exchanger 12 for exchanging heat between the refrigerant liquid in the high-pressure liquid pipe and the refrigerant gas in the compressor suction pipe, and an accumulator 10 between the high-pressure refrigerant liquid and the low-pressure refrigerant liquid. The accumulator is formed into a heat exchange type accumulator to perform heat exchange at the same time, and supercools the high-pressure refrigerant and superheats the suction refrigerant at the same time, thereby achieving the sealing effect of the expansion valve 5 and optimizing the degree of superheating of the suction refrigerant. Accumulator 1
The pilot low pressure line 13 is bypassed between the low pressure side population and the outlet of 0, and the control device 2 is connected to this pilot low pressure line 13.
An electric heater 14 whose heating is controlled via the electric heater 4 is attached, and the temperature of the low-pressure refrigerant gas superheated by the electric heater 14 is used as a control element for the expansion valve 5.

By providing such a pilot low pressure line 13, in the refrigeration system, the control responsiveness of the expansion valve 5 is improved, and the refrigerant flow rate can be appropriately adjusted.
Refrigeration operation that can maximize the heat exchange capacity of the evaporator by keeping the user side coil 3 or heat source side coil 8, which acts as an evaporator, in a state of moist gas all the way to the outlet while returning superheated gas. is performed stably.

The above device is provided with a water heat exchanger 15 (hereinafter referred to as hot water coil 15) for obtaining hot water for hot water supply, and a hot water storage tank 16 surrounded by a heat insulating wall. is interposed in the discharge pipe connected between the compressor 1 and the four-way switching valve 2, and a hot water circulation circuit is provided between the water side passage of the hot water supply coil 15 and the water tank of the hot water storage tank 16. is forming.

In FIG. 1, 17 is a pump provided in the hot water circulation circuit, and 22 is a pump provided in the cold water circuit, which is a device for supplying a heat medium for exchanging heat with the utilization side coil 3.

The hot water supply/cooling/cooling device having the above structure includes a cold/hot water thermometer 18 installed at the entrance of the water side passage of the heat medium of the utilization side coil 3 to detect the return water temperature, and installed inside the water tank of the hot water storage tank 16, respectively. Hot water storage thermos 19 and 20 that individually detect the maximum temperature and minimum temperature, a high pressure switch 21 that detects high pressure, and a hot water thermostat 23 that detects the hot water temperature of the hot water coil 15.
, a defrost antifreeze thermostat 26 to prevent water from freezing during defrost operation, a deicer 21 to issue a defrost detection command, and an antifreeze thermostat 28 to prevent water from freezing when the operation is stopped. Automatically controlled operation is achieved by the electric circuit shown in FIG.

The cold/hot water thermometer 18 is a thermistor 1 as a temperature detection element.
8c, a cold water temperature regulator 18a connected to thermistor 18c during the cooling cycle, and thermistor 1 during the heating cycle.
Both regulators 18a and 18b have their output contacts open when they are disconnected from the thermistor 18c, and when they are connected to the thermistor 18c. operates to close the output contact above the set temperature.

The hot water storage thermometer 19 on the high temperature side operates to open the output contact when the hot water temperature reaches 55°C or higher, and the low temperature side hot water storage thermometer 20 similarly operates to open the output contact when the hot water temperature reaches 47°C or higher.

The high pressure switch 21 operates to switch the output contact based on the set pressure of 28 kg/cIIL or less, 23 kg/i, of the protective pressure switch 29-1.

The hot water supply thermometer 23 operates to switch the output contact based on 80°C.

During defrosting, the antifreeze thermostat 26 opens the output contact at temperatures below 18°C.

The de-icer 27 operates to close the output contact when the frost has grown to the extent that defrosting is required, and to maintain this closed state for a predetermined period of time.

As shown in the third diagram, the electric circuit includes an operation mode selection circuit section (a), a compressor drive circuit section (port), a refrigeration cycle switching circuit section (c), a supply device drive circuit section (ii), and a hot water pump drive circuit section (e) as elements. , further to the cold and hot water relay circuit section,
It is provided with a hot water storage relay single step part, a heat source side fan 25 drive circuit part, and a defrost command circuit part, and each of these circuit parts will be explained in order.

O operation mode selection circuit part a: Cooling mode a (hereinafter referred to as cold mode a), hot water supply priority cooling mode b (hot water/cold mode b), hot water supply priority heating mode C (
The selection switch 35 has six types of notches: hot water/warm mode c), heating priority hot water mode d (warm/hot water mode d), heating mode e (warm mode e), and hot water mode f (hot water mode f). +b s Cr de e cold relay 30, hot/cold relay 31, which is energized for each notch;
Hot water/warm relay 32, warm/hot water relay 33, warm relay 34,
By operating the start push button 38, each safety device 29-1 to 29
-n is operating abnormally 711. ) and self-maintains until the activation is stopped until the push button 41 is operated or the safety device 2
It consists of a power relay 40 that lasts until any one of 9-5 to 29-n is activated.

○Compressor drive circuit port: Electromagnetic switch 42 that starts and stops motor 1M of compressor 1;
The electromagnetic switch 42 includes an off-delay timer 41 set to a short time of about seconds, and is closed at the same time as the timer 47 is turned on, and is released when the timer 47 is turned off.

On the other hand, the off-delay timer 47 is a pressure source required for switching the four-way switching valve 2 because the general four-way switching valve 2 uses the high and low pressure of the refrigeration circuit as a pilot pressure source. It is used as a relay to take timing to ensure that the timer is set to 2.
This purpose can be achieved by making the time short, on the order of seconds.

Thus, the timer 47 continues to close the output contact while the following conditions exist, and then opens it after a set time delay.

That is, when the selection switch 35 is set to the cold mode a and there is an output output from the cold/hot water relay circuit section due to the high temperature of the cooling water, and when the selection switch 35 is set to the hot/cold mode b. , and there is an output output from the cold/hot water relay circuit section due to the high temperature of the cold water for air conditioning, or the hot water in the hot water storage tank 16 from the hot water relay once depressed reaches the set temperature (55 ℃
) or below, and the selection switch 35 is set to the hot/warm mode C, the warm/hot water mode d, or the warm mode e, and the heating is output from the cold/hot water relay circuit section. When there is an output due to the hot water being used at a low temperature, and when it is set to hot water/warm mode C or warm/hot water mode d and the hot water storage tank 1
There are nine states: when the internal hot water is below the set temperature, and when the defrost command circuit outputs an output that requires defrosting.

○ Refrigeration cycle switching circuit part c; Solenoid 2 that switches the valve to the cooling cycle side by energizing the four-way switching valve 2 and to the heating cycle side by demagnetizing it.
s is an element, and the solenoid 2s is excited and set to the cooling cycle side in the presence of each of the following conditions, while it is set to the heating cycle side in the presence of other conditions.

That is, when the selection switch 35 is set to cold mode a, and when it is also set to hot/cold mode b,
There is an output from the hot water storage relay single step when the hot water in the hot water storage tank 16 is 55°C or higher, or an output when the temperature is 55°C or lower and cold water is output from the cold/hot water relay circuit. 4. When there is an output generated due to high temperature, and when an output that requires defrost is output from the defrost command circuit.
It is set to the cooling cycle side under each of the following conditions.

○ Supply device drive circuit part 2; Motor 2 of the cold/hot water pump 22 installed in the cold/hot water circulation circuit
The element includes an electromagnetic switch 44 for starting and stopping the pump 2M, and the electromagnetic switch 44 is energized to drive the pump 22 under the following conditions.

That is, the selection switch 35 is set to cold mode a and warm/hot mode d.
and warm mode e, respectively, hot water/cold mode b is set, and there is an output from the cold/hot water relay circuit due to the high temperature of the cold water, or the hot water storage relay is activated once. The hot water from the foot is 55 degrees Celsius.
There is an output produced when the above conditions are met, and an output produced when hot water is set to hot water/warm mode C and the hot water from the hot water storage relay is 55°C or higher. 8 when there is an output from the defrost command circuit that requires defrost, and when the water temperature in the user side coil 3 drops below the set temperature of the antifreeze thermostat 28 during winter operation stoppage. There are two states.

In other words, this is hot/cold mode b,
When the cold water in the cold/hot water circulation circuit is below the set temperature and the hot water in the hot water circulation circuit is below the set temperature, hot water/warm mode C is in effect, and when the hot water in the hot water circulation circuit is below the set temperature, the hot water mode is This means that the cold/hot water pump 22 is operated at all times except when it is stopped under each of the three conditions e.

0 Hot water pump drive circuit section E; Motor 17M of the hot water pump 1T installed in the hot water circulation circuit
The element includes a normally closed electromagnetic switch 43 for starting and stopping the switch, and energizes the electromagnetic switch 43 under each of the following conditions.
The pump 1γ is stopped.

That is, when the compressor 1 is stopped, and even when the compressor 1 is running, the selection switch 35 is set to warm/hot water mode d, and the hot water temperature from the cold/hot water relay circuit section is high. If the selection switch 35 is set to warm mode e and the hot water in the hot water coil 15 is below the dangerous temperature, The pump 11 is stopped under each of four conditions: when the defrost command circuit section is in a certain state, and when there is an output from the defrost command circuit section that requires defrost.

○To cold and hot water relay circuit section; cold water temperature regulator 18a, hot water temperature regulator 18b, thermistor 18c, on-delay timer 46 and relay 3
6, and when the selection switch 35 is set to cold mode a1 hot water mode and cold mode b, respectively, that is, with the refrigeration circuit set to the cooling cycle, the cold water temperature regulator 18
a is activated, and each other mode C+ d 3 e)
f respectively, that is, the hot water temperature regulator 18b is automatically switched to operate in a state where it is set to the heating cycle.

Particularly in the case of a cooling cycle in which the cold water temperature regulator 18a operates, and when the hot/cold mode b is set, the timer 46 is activated to start the compressor 1 for a predetermined period of 10 minutes. The circuit is configured to delay the time.

That is, in the case of hot/cold mode b, when the water temperature in the user-side water coil 3 becomes higher than the set temperature, the relay 36 is energized after 10 minutes have passed, and each contact of the relay 36 is activated. In addition, when the temperature becomes lower than the set temperature, the respective contacts are immediately returned to their original positions, and the characteristics of this operation will be clarified in the explanation of the operating mode below.

O Hot water storage relay circuit part G: A circuit that uses a hot water storage thermometer 19 on the high temperature side provided in the hot water storage tank 16 as an element, and outputs different outputs depending on, for example, when the hot water temperature has not reached 55°C and when it is 55°C or higher. is formed.

○Heat source side fan drive circuit section Ch: A normally closed electromagnetic switch 45 for starting and stopping the motor 25M of the heat source side fan 25, and a switch 47 provided in the hot water storage tank 16, for example.
It consists of a low-temperature side hot water storage thermometer 20 set at ℃, and a high-pressure switch 21 that detects the high pressure and force of the frozen thread.
Under each of the following conditions, the electromagnetic switch 45 is energized and the heat source side fan 25 is stopped.

That is, when the compressor 1 is stopped, when the compressor 1 is in operation, the defrost operation is not performed, and when the compressor 1 is in the cold mode a, the high pressure and force of the refrigeration circuit is low, and the hot water storage temperature is 47°C.
In hot water/cold mode B, the high pressure force is low and the hot water storage temperature is 47°C or less and the cooling water temperature is high; in hot water/warm mode C, the high pressure force is low. In hot water/cold mode b, when the cooling water temperature is low and the high pressure and pressure is high, and in warm mode e, when the heating hot water temperature is low and the high pressure and pressure is high. Mo 1
The fan 25 is stopped when each of the eight conditions including 'f' and high pressure and high force are reached.

O Defrost command circuit: It consists of a defrost antifreeze thermo 26, a deicer 27, and a defrost relay 48, and when the thermo 26 does not operate during the heating cycle and the deicer 27 detects frost formation. At times, the defrost relay 48 is energized in conjunction with the energization of the compressor 1.

Next, each operating mode of the heat pump type air-conditioning device will be explained one by one.

O? /+Full operation; Set the selection switch 35 to cold mode a, and press the start button 3.
8, the cold/hot water pump 22 is driven, the four-way switching valve 2 is set to the cooling cycle side by the excitation of the solenoid 2s, and the compressor 1 is set to the cold water temperature regulator 18.
The heat source side fan 25 is automatically started and stopped by a, and the heat source side fan 25 is stopped while the high pressure and force are low and the hot water in the hot water storage tank is below 47° C., and the hot water pump 17 is energized.

At this time, the refrigerant circulates through the refrigeration circuit as shown in the first figure, the cold/hot water circuit circulates cold water, and the hot water circulation circuit circulates hot water.

When the hot water in the hot water storage tank 16 reaches 47° C. or higher or the high pressure rises, the heat source side fan 25 is activated.

O hot water supply priority cooling operation: When the selection switch 35 is set to hot/cold mode b, the hot water supply pump 17 continues to be energized.

The compressor 1 is activated immediately when the hot water temperature of the hot water storage tank 16 is lower than the set temperature of 55°C of the high temperature side hot water storage thermometer 19, and when the cold water temperature of the cold/hot water circulation circuit is higher than the set temperature, the set time of the timer 46 is activated. Power on with a 10 minute delay.

The four-way switching valve 2 has the hot water temperature in the hot water tank 16 set at 55°C.
If it is above, it will be set to the cooling side immediately, and the hot water tank 1 will be set to the cooling side.
If the hot water temperature in 6 is below 55°C, the cold water temperature regulator 1
8a is set to the cooling side 10 minutes after activation because the cold water temperature is high.

The cold/hot water pump 22 is activated immediately when the hot water temperature is 55° C. or higher, and the cold water temperature regulator 18a is activated when the cold water temperature is high.
It is energized 10 minutes after activation.

Thus, while the hot water temperature in the hot water storage tank 16 is low, the compressor 1 is forcibly energized and the four-way selector valve 2 is set to the cooling side, so the cooling operation is started and stopped giving priority to hot water supply. .

The refrigerant flow in the refrigeration circuit at this time is as shown in FIG.

Note that if the cold water temperature drops before the hot water supply temperature reaches 55°C, the relay 39 is not energized.
By deenergizing the timer 46 and the relay 36, the four-way switching valve 2 is switched to the heating side as the solenoid 1/noid 2s is demagnetized.
Moreover, while the cold/hot water pump 22 is stopped, the compressor 1 and the hot water supply pump 1γ remain in operation.

Therefore, the refrigeration circuit switches from the cooling cycle to the heating cycle, and the cold water cooling operation is interrupted and only the hot water heating operation continues.

(See Figure 2) When the temperature of the chilled water rises and it becomes necessary to use air conditioning, the relay 36 is energized after 10 minutes, and the four-way selector valve 2 is switched to the cooling side to supply hot water and cool the air. Driving takes place.

In this case, immediately before switching to the cooling cycle, hot water heating operation using the heating cycle has been performed for at least 10 minutes, so the refrigerant circulation state is stable, and therefore the water coil 3 on the user side is transferred from the condenser to the evaporator. Even after conversion, there is no concern that liquid will return, and the compressor will be fully protected.

Further, since the heat source side fan is stopped, the condensed latent heat is consumed exclusively by the hot water supply coil 15, and the heating capacity for the hot water increases, so that the temperature of the hot water rapidly rises.

When the hot water temperature reaches 47°C, the heat source side fan starts operating and the heat sink coil 8 operates at full capacity, so the heat exchange capacity gradually decreases due to the condenser heat exchange capacity due to the hot water supply coil 15. As a result, the refrigeration capacity is sufficient and stable, and the cooling capacity of the chilled water is fully utilized.

○Hot water priority heating operation: When the selection switch 35 is set to hot water heating mode C, the hot water pump 17 continues to be energized, the cold/hot water pump 22 is energized when the hot water in the hot water circulation circuit is 55°C or higher, and the compressor is activated. 1 is energized when the hot water in the cold/hot water circulation circuit is below the set temperature or when the hot water in the hot water circulation circuit is below 55°C (see Fig. 2).

Further, the four-way switching valve 2 is always set to the heating side in a non-energized state, but when defrosting is required, the four-way switching valve 2 is switched to the cooling side by the operation of the defrost relay 48, as shown in FIG. As shown in the figure, the refrigerant flows and the hot gas defrosts the air.

From the above, it is clear that heating is not performed until the hot water in the hot water storage tank 16 rises to a predetermined temperature, heating is performed when the temperature reaches 55°C, and the compressor 1 stops when the hot water for heating also rises. be.

O Heating priority hot water supply operation: When the selection switch 35 is set to warm/hot water mode d, the hot water pump 17 operates while the hot water temperature in the cold/hot water circulation circuit is high, the cold/hot water pump 22 continues to operate, and the compressor 1 operates to circulate cold/hot water. When the hot water temperature in the circuit is low or the hot water temperature in the hot water tank 16 is low, such as 55 degrees Celsius or lower, it operates before further defrosting is required, while the four-way selector valve 2 is always de-energized and switched to the heating side. (see Figure 2), and is also set to the cold side when defrosting is required (the first
(see figure).

Therefore, heat is not stored in the hot water tank 16 until the temperature of the heating hot water rises.

However, if the temperature of the hot water supply coil 15 is 80° C. or higher, heat storage is performed.

Then, when the hot water temperature rises, heat storage in the hot water storage tank 16 is started, and the compressor 1 is operated such that the temperatures of both the heating hot water and hot water supply reach predetermined values, and the compressor 1 is stopped.

O Heating operation: When the selection switch 35 is set to the warming mode e, the hot water pump 17 continues to operate while the hot water temperature in the hot water coil 15 section is 80° C. or higher, and while the cold/hot water pump 22 continues to operate at all times, the compression Machine 1 operates while the hot water for heating is low.

The four-way switching valve 2 is always set to the heating cycle side with the solenoid not energized (see FIG. 2), and is set to the cooling cycle side when defrosting is required.

Therefore, the compressor 1 is started and stopped depending on the heating hot water temperature, and heat is stored in the hot water storage tank 16 when the heating hot water temperature is low and the hot water supply coil 15 temperature is 80° C. or higher.

O Hot water supply operation: When the selection switch 35 is set to hot water mode f, the hot water pump IT continues to operate, the four-way selector valve 2 is always set to the heating side, and the compressor 1 is operated so that the temperature of the hot water in the hot water tank 16 is 55°C.
When defrosting is required, the four-way selector valve 2 is switched to the cooling side (see FIG. 1) to enter defrost operation.

0 Defrost operation: When the hot water temperature of the hot water coil 15 is less than 80°C, the hot water pump IT is stopped when set to warm/hot water mode d or warm mode e, and set to hot water/warm mode C. When the hot water supply pump IT is running, the hot water pump IT operates.

The cold/hot water pump 22 operates during the defrost operation.

The above seven types of operation modes are as shown in FIG.

In this embodiment, a water-to-water type heat exchanger is used as the user-side oil 3, but an air-to-air type heat exchanger may be used instead.

In this case, it goes without saying that the cold/hot water pump 22 serving as a supply device may be replaced with an air supply fan, and the cold/hot water thermostat 18 may be replaced with a thermostat that senses the temperature of the air on the suction side of the heat exchanger.

The present invention has the above-mentioned configuration and operation, and by simply operating the selection switch provided in the operation mode selection circuit section A, the present invention can select between cooling, cooling with priority to hot water supply, heating with priority to hot water supply,
Six operating modes: heating priority hot water supply, heating and hot water supply,
It is possible to operate the refrigeration system according to the user's requirements, select a mode with high operating efficiency, and operate the refrigeration equipment effectively, so running costs are kept low, and an auxiliary heat source such as a hot water boiler is completely omitted. As a result, the cost of the device can be significantly reduced, resulting in excellent effects.

In particular, since it is only necessary to operate the selection switch, handling is extremely easy, making it an extremely useful invention.

[Brief explanation of drawings]

1 and 2 are device circuit diagrams relating to an example of the heat pump air-conditioning device of the present invention, with FIG. 1 showing a cooling cycle and FIG. 2 showing a heating cycle, respectively. FIG. 3 is an electric circuit diagram of the heat pump type air-conditioning device with hot water supply device according to the present invention, and FIG. 4 is a drawing showing the operating mode. 1... Compressor, 2... Four-way switching valve, 3
...Using side heat exchanger, 4...Pressure reducer,
8...Heat source side heat exchanger, 15...Water heat exchanger for hot water supply, 16...Hot water storage tank, 11...
... Hot water pump, 22 ... Cold and hot water pump as a supply device, A ... Operation mode selection circuit section,
Mouth: Compressor drive circuit section, C: Refrigeration cycle switching circuit section, 2: Supply device drive circuit section, E: Hot water pump drive circuit Department.

Claims (1)

[Claims] 1 Compressor 1, four-way switching valve 2, heat exchanger 3 on the user side, pressure reducer 4, heat exchanger 8 on the heat source side, compressor 1 and four-way switching valve 2
A heat pump refrigeration circuit is constructed by a water-to-water heat exchanger 15 for hot water supply interposed in the discharge pipe connecting the heat exchanger 3 to the heat exchanger 3 on the user side. 22, the water side thread of the water heat exchanger 15 for hot water supply and the hot water storage tank 16 are connected via piping via the hot water pump 17 to form a hot water circulation circuit, while the compressor 1 and the four-way The electric circuits related to the switching valve 2 supply device 22 and the hot water pump 17 are controlled by an operation mode selection circuit section a; selects and commands six operation modes: cooling, hot water priority cooling, hot water priority heating, heating priority hot water supply, heating, and hot water supply. A switching circuit consisting of a selection switch mechanism to switch to the compressor drive circuit; the selection circuit part A is in the cooling mode when the cold water in the cold/hot water circulation circuit is at a predetermined temperature or higher, and in the hot water supply priority cooling mode and the cold/hot water circulation When the hot water in the hot water circulation circuit is below a predetermined temperature because the cold water in the circuit is above a predetermined temperature, the hot water supply priority heating mode or heating priority hot water supply mode is selected.
When the hot water temperature in the cold/hot water circuit is below a predetermined temperature or when the hot water in the hot water circulation circuit is below a predetermined temperature, the mode is heating; when the hot water in the cold/hot water circuit is below a predetermined temperature, the hot water mode is Yes, a circuit that drives the compressor 1 in each state when the hot water in the hot water supply circulation circuit is below a predetermined temperature. Refrigeration cycle switching circuit section C: When the selection circuit section A is in the cooling mode and when the hot water supply priority cooling mode The four-way switching valve 2 is set to the cooling side in each state when the hot water in the hot water circulation circuit is above a predetermined temperature, or when the hot water is below a predetermined temperature and the cold water in the cold/hot water circulation circuit is above a predetermined temperature. supply device drive circuit section 2: the selection circuit section 2 is in hot water priority cooling mode, and the cold/hot water circulation circuit is activated. When the cold water in the hot water supply circulation circuit is below the set temperature and the hot water in the hot water supply circulation circuit is below a predetermined temperature, when the hot water supply priority heating mode is in effect and the hot water in the hot water supply circulation circuit is below the predetermined temperature, and when in the hot water supply mode. A circuit that stops the supply device 22 in each state and operates the supply device 22 in each state other than the above states, Supply pump drive circuit section E: The selection circuit section A is in heating priority hot water supply mode, and cold/hot water circulation is performed. The hot water pump operates in each of the following states: when the hot water in the circuit is at a predetermined temperature or higher and the hot water in the hot water circulation circuit has not reached the dangerous temperature, and when the hot water in the hot water circulation circuit is in heating mode and the hot water in the hot water circulation circuit has not reached the dangerous temperature. A heat pump type air-conditioning/heating device with a hot water supply device, characterized in that it is constituted by the following circuit parts: a circuit for stopping the hot water supply pump 17 in conjunction with the compressor 1 in each state other than the above-mentioned states. Device.