CN204494792U - Modular air-cooled heat pump hot water unit - Google Patents

Abstract

The utility model discloses a modular air-cooled heat pump hot water unit, its first four-way reversing valve (2) respectively with compressor (1), second four-way reversing valve (3) and hot water side shell and tube heat exchanger (6) intercommunication, second four-way reversing valve (3) respectively with outdoor heat exchanger (4), compressor (1) and indoor heat exchanger (5) intercommunication, indoor heat exchanger (5) are through first check valve (7) and first electronic expansion valve (10) and outdoor heat exchanger (4) intercommunication, hot water side shell and tube heat exchanger (6) are through second check valve (8) and first electronic expansion valve (10) intercommunication, second check valve (8) are through second electronic expansion valve and indoor heat exchanger (5) intercommunication, outdoor heat exchanger (4) are through third check valve (9) and second electronic expansion valve (11) intercommunication. The unit integrates the air conditioning system and the water heating system to reduce the operation cost, has high efficiency, energy conservation, low noise, no harmful gas emission, no environmental pollution and space saving.

Description

Modular air-cooled heat pump hot water unit

technical field

The utility model relates to the field of air conditioning, in particular to a modular air-cooled heat pump hot water unit.

Background technique

At present, offices, hotels, hospitals, restaurants and other places that use air-conditioning units also need to use domestic hot water, but generally the air-conditioning system and the hot water system are completely separated, and the simultaneous operation of the two independent systems requires high energy consumption and operational management costs. Moreover, many occasions such as hotels and group dormitories have high requirements on noise and surrounding environment, and it is not allowed to install boilers, or it is not easy to install cooling towers and other hot water equipment.

Utility model content

The technical problem to be solved by the utility model is to provide a modular air-cooled system that integrates the air conditioning system and the hot water system to reduce operating costs, has high efficiency and energy saving, low noise, no harmful gas emissions, does not pollute the environment, and saves space. Heat pump hot water unit.

The technical solution of the utility model is to provide a modular air-cooled heat pump hot water unit with the following structure, which includes at least one refrigerant circulation module, each refrigerant circulation module includes a compressor, a first four-way reversing valve, Second four-way reversing valve, outdoor heat exchanger, indoor heat exchanger, hot water side shell-and-tube heat exchanger for hot water production, first check valve, second check valve, third check valve , the first electronic expansion valve and the second electronic expansion valve; the outlet of the compressor communicates with the second valve port of the first four-way reversing valve, and the first valve port of the first four-way reversing valve communicates with the second four-way reversing valve The second valve port of the first four-way reversing valve is connected with the first refrigerant port of the shell-and-tube heat exchanger on the hot water side; the first valve port of the second four-way reversing valve is connected with the The first refrigerant port of the outdoor heat exchanger is connected, the fourth valve port of the second four-way reversing valve is connected with the compressor inlet, and the third valve port of the second four-way reversing valve is connected with the first refrigerant port of the indoor heat exchanger. The second refrigerant port of the indoor heat exchanger communicates with the inlet of the first one-way valve, the outlet of the first one-way valve communicates with the inlet of the first electronic expansion valve, and the outlet of the first electronic expansion valve exchanges heat with the outdoor The second refrigerant port of the hot water side shell-and-tube heat exchanger is connected with the inlet of the second one-way valve, the outlet of the second one-way valve is connected with the inlet of the first electronic expansion valve, and the second The outlet of the one-way valve is connected with the inlet of the second electronic expansion valve, and the outlet of the second electronic expansion valve is connected with the second refrigerant port of the indoor heat exchanger; the second refrigerant port of the outdoor heat exchanger is connected with the third one-way valve. The inlet is connected, and the outlet of the third check valve is connected with the inlet of the second electronic expansion valve.

The working principle of the unit is described in four working modes.

One is the independent heating mode, connect the first valve port and the second valve port of the first four-way reversing valve, connect the second valve port and the third valve port of the second four-way reversing valve, connect the first Open the electronic expansion valve, close the second electronic expansion valve, and the refrigerant flows along the compressor, the second valve port and the first valve port of the first four-way reversing valve, and the second valve port and the second valve port of the second four-way reversing valve. The third valve port, the indoor heat exchanger, the first one-way valve, the first electronic expansion valve, the outdoor heat exchanger, the first valve port and the fourth valve port of the second four-way reversing valve, and the compressor. .

The second is the hot water heating mode alone. Connect the second valve port and the third valve port of the first four-way reversing valve, connect the first valve port and the fourth valve port of the second four-way reversing valve, and connect the first valve port to the fourth valve port. The electronic expansion valve is opened, the second electronic expansion valve is closed, and the refrigerant flows along the compressor, the second valve port and the third valve port of the first four-way reversing valve, the hot water side shell-and-tube heat exchanger, the second one-way Valve, the first electronic expansion valve, the outdoor heat exchanger, the first valve port and the fourth valve port of the second four-way reversing valve, and the compressor cycle.

The third is the independent refrigeration mode, connect the second valve port of the first four-way reversing valve with the first valve port, connect the second valve port of the second four-way reversing valve with the first valve port, and connect the second valve port of the second four-way reversing valve. The electronic expansion valve is opened, the first electronic expansion valve is closed, and the refrigerant flows along the compressor, the second valve port and the first valve port of the first four-way reversing valve, and the second valve port and the second valve port of the second four-way reversing valve. The first valve port, the outdoor heat exchanger, the third one-way valve, the second electronic expansion valve, the indoor heat exchanger, the third valve port and the fourth valve port of the second four-way reversing valve, and the compressor cycle. .

The fourth is cooling and hot water heating mode, connect the second valve port and the third valve port of the first four-way reversing valve, connect the third valve port and the fourth valve port of the second four-way reversing valve, Open the second electronic expansion valve, close the first electronic expansion valve, and the refrigerant flows along the compressor, the second valve port and the third valve port of the first four-way reversing valve, the hot water side shell-and-tube heat exchanger, the second The route of the second one-way valve, the second electronic expansion valve, the indoor heat exchanger, the third valve port and the fourth valve port of the second four-way reversing valve, and the compressor circulates.

From the above analysis, it can be seen that compared with the prior art, the utility model modular air-cooled heat pump water heater has the following advantages:

First of all, in addition to the normal cooling and heating mode, the unit can also prepare hot water independently, and more importantly, it can cool and heat hot water at the same time, which realizes heat recovery and avoids the heat transferred from the user's room in summer from dissipating to the Waste in the air, high efficiency, effectively saving energy consumption, reducing operating costs, and alleviating the city’s heat island effect; moreover, it does not need to use boilers and other equipment when heating hot water, with low noise, no harmful gas emissions, and no harm to the environment Pollution; moreover, the unit has a compact structure, does not need to add a boiler, occupies a small area, saves space, and is easy to maintain.

As an improvement, each refrigerant cycle module also includes a refrigerant balance pipe, and the fourth valve port of the first electronic expansion valve is connected with the inlet of the compressor through the refrigerant balance pipe, so that when the unit switches between each mode, it can Effectively return the refrigerant in the idle heat exchanger to the compressor to ensure that there is no shortage of refrigerant when the unit is running in each mode. For example, when the module switches from the hot water heating mode to the heating mode alone, the refrigerant trapped in the shell-and-tube heat exchanger on the hot water side can pass through the third valve port and the fourth valve port of the first four-way reversing valve. , the refrigerant balance pipe returns to the compressor; similarly, when the module switches from the sole heating mode to the sole heating water mode, the refrigerant retained in the indoor heat exchanger can pass through the third valve port of the second four-way reversing valve and The second valve port, the first valve port and the fourth valve port of the first four-way reversing valve, and the refrigerant balance pipe return to the compressor; when the module switches from the cooling mode to the cooling and hot water heating mode, the outdoor heat exchanger The refrigerant retained in the refrigerant can return to the compressor through the first valve port and the second valve port of the second four-way reversing valve, the first valve port and the fourth valve port of the first four-way reversing valve, and the refrigerant balance pipe. .

Description of drawings

Fig. 1 is a schematic diagram of the system of the modular air-cooled heat pump water heating unit of the present invention.

As shown in the figure 1. Compressor, 2. The first four-way reversing valve, 3. The second four-way reversing valve, 4. Outdoor heat exchanger, 5. Indoor heat exchanger, 6. Hot water side shell tube Heat exchanger, 7. First one-way valve, 8. Second one-way valve, 9. Third one-way valve, 10. First electronic expansion valve, 11. Second electronic expansion valve, 12. Refrigerant balance pipe, 13. Gas-liquid separator, 14. First liquid reservoir, 15. Second liquid reservoir.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is further described.

As shown in Figure 1, the utility model modular air-cooled heat pump water heater unit includes at least one refrigerant circulation module.

Each refrigerant cycle module includes a compressor 1, a first four-way reversing valve 2, a second four-way reversing valve 3, an outdoor heat exchanger 4, an indoor heat exchanger 5, and a hot water side shell for making hot water Tube heat exchanger 6 , first check valve 7 , second check valve 8 , third check valve 9 , first electronic expansion valve 10 and second electronic expansion valve 11 .

The shell-and-tube heat exchanger 6 on the hot water side is provided with a first refrigerant port and a second refrigerant port for refrigerant in and out, and a hot water inlet and a hot water outlet for hot water in and out. The indoor heat exchanger 5 is also a shell-and-tube heat exchanger. The heat exchanger has a first refrigerant port and a second refrigerant port for the refrigerant to enter and exit, and an air-conditioning water inlet and an air-conditioning water outlet for the air-conditioning water to enter and exit. After exchanging heat in the shell-and-tube heat exchanger, the refrigerant enters the air duct from the outlet of the air conditioner, enters the user's room along with the air duct to exchange heat, and finally flows back to the air conditioner water inlet along with the air duct.

The outlet of the compressor 1 communicates with the second valve port of the first four-way reversing valve 2, and the first valve port of the first four-way reversing valve 2 communicates with the second valve port of the second four-way reversing valve 3, The third valve port of the first four-way reversing valve 2 communicates with the first refrigerant port of the shell-and-tube heat exchanger 6 on the hot water side; the first valve port of the second four-way reversing valve 3 communicates with the outdoor heat exchanger 4 The first refrigerant port is connected. The fourth valve port of the second four-way reversing valve 3 communicates with the inlet of the compressor 1, more specifically, the fourth valve port of the second four-way reversing valve 3 communicates with the inlet of the gas-liquid separator 13, and the gas-liquid The outlet of the separator 13 communicates with the inlet of the compressor 1 . The third valve port of the second four-way reversing valve 3 communicates with the first refrigerant port of the indoor heat exchanger 5; the second refrigerant port of the indoor heat exchanger 5 communicates with the inlet of the first one-way valve 7, and the first one-way valve The outlet of the valve 7 communicates with the inlet of the first electronic expansion valve 10 , and the outlet of the first electronic expansion valve 10 communicates with the second refrigerant port of the outdoor heat exchanger 4 . The second refrigerant port of the hot water side shell-and-tube heat exchanger 6 communicates with the inlet of the second one-way valve 8 , and the outlet of the second one-way valve 8 communicates with the inlet of the first electronic expansion valve 10 . The outlet of the second check valve 8 is also communicated with the inlet of the second electronic expansion valve 11 , and the outlet of the second electronic expansion valve 11 is communicated with the second refrigerant port of the indoor heat exchanger 5 . The second refrigerant port of the outdoor heat exchanger 4 communicates with the inlet of the third one-way valve 9 , and the outlet of the third one-way valve 9 communicates with the inlet of the second electronic expansion valve 11 .

Each refrigerant cycle module further includes a refrigerant balance pipe 12 , and the fourth valve port of the first electronic expansion valve 10 communicates with the inlet of the compressor 1 through the refrigerant balance pipe 12 . Specifically, the fourth valve port of the first electronic expansion valve 10 communicates with the inlet of the refrigerant balance pipe 12, the outlet of the refrigerant balance pipe 12 communicates with the inlet of the gas-liquid separator 13, and the outlet of the gas-liquid separator 13 communicates with the inlet of the compressor 1. connected.

A first accumulator 14 is provided between the second refrigerant port of the indoor heat exchanger 5 and the inlet of the first one-way valve 7 . A second accumulator 15 is provided between the second refrigerant port of the hot water side shell-and-tube heat exchanger 6 and the inlet of the second check valve 8 .

Claims (2)

1. A modular air-cooled heat pump water heater unit, which includes at least one refrigerant circulation module, is characterized in that: each refrigerant circulation module includes a compressor (1), a first four-way reversing valve (2), a second Four-way reversing valve (3), outdoor heat exchanger (4), indoor heat exchanger (5), hot water side shell-and-tube heat exchanger (6) for making hot water, first one-way valve (7 ), the second one-way valve (8), the third one-way valve (9), the first electronic expansion valve (10) and the second electronic expansion valve (11); the outlet of the compressor (1) is connected to the first four-way The second valve port of the reversing valve (2) is connected, the first valve port of the first four-way reversing valve (2) is connected with the second valve port of the second four-way reversing valve (3), and the first four-way The third valve port of the reversing valve (2) communicates with the first refrigerant port of the shell-and-tube heat exchanger (6) on the hot water side; the first valve port of the second four-way reversing valve (3) communicates with the outdoor heat exchanger The first refrigerant port of (4) is connected, the fourth valve port of the second four-way reversing valve (3) is connected with the inlet of the compressor (1), and the third valve port of the second four-way reversing valve (3) is connected with The first refrigerant port of the indoor heat exchanger (5) is connected; the second refrigerant port of the indoor heat exchanger (5) is connected with the inlet of the first one-way valve (7), and the outlet of the first one-way valve (7) is connected with the The inlet of the first electronic expansion valve (10) is connected, and the outlet of the first electronic expansion valve (10) is connected with the second refrigerant port of the outdoor heat exchanger (4); the second refrigerant port of the hot water side shell-and-tube heat exchanger (6) The second refrigerant port communicates with the inlet of the second one-way valve (8), the outlet of the second one-way valve (8) communicates with the inlet of the first electronic expansion valve (10), and the outlet of the second one-way valve (8) communicates with the inlet of the first electronic expansion valve (10). The inlet of the second electronic expansion valve (11) is connected, and the outlet of the second electronic expansion valve (11) is connected with the second refrigerant port of the indoor heat exchanger (5); the second refrigerant port of the outdoor heat exchanger (4) is connected with the The inlet of the third one-way valve (9) is connected, and the outlet of the third one-way valve (9) is connected with the inlet of the second electronic expansion valve (11). 2. The modular air-cooled heat pump water heater unit according to claim 1, characterized in that: each refrigerant cycle module also includes a refrigerant balance pipe (12), the fourth valve of the first electronic expansion valve (10) The port is communicated with the inlet of the compressor (1) through the refrigerant balance pipe (12).