CN203036787U - Air source heat pump air conditioning system capable of supplying domestic hot water - Google Patents

Abstract

The utility model discloses an air source heat pump air conditioning system capable of supplying domestic hot water. An inlet pipe of a compressor is connected with an outlet pipe of a vapor-liquid separator, an outlet pipe of the compressor is connected with an air inlet pipe of a first four-way valve, a right side pipe of the first four-way valve is connected with an air inlet pipe of a second four-way valve through a one-way valve, and a left side pipe of the first four-way valve is connected with an air inlet pipe of a third four-way valve through a hot water heat exchanger. A left side pipe of the second four-way valve is connected with an indoor unit heat exchanger, and a right side pipe of the second four-way valve is connected with an outdoor unit heat exchanger. The indoor unit heat exchanger is connected with the outdoor unit heat exchanger through a liquid reservoir and an expansion valve. A right side pipe of the third four-way valve is connected with the air inlet pipe of the second four-way valve, a left side pipe of the third four-way valve is connected with the liquid reservoir, and a middle pipe of each four-way valve is connected with an inlet pipe of the vapor-liquid separator. The air source heat pump air conditioning system capable of supplying the domestic hot water can not only supply the domestic hot water, but also adjust air temperatures, and improve the reliability and the stability of operation.

Description

Air source heat pump air conditioning system that can provide domestic hot water

technical field

The utility model relates to an air conditioning system, in particular to an air source heat pump air conditioning system.

Background technique

Compared with the air source frequency conversion multi-connection unit, the air source variable capacity separate modular heat pump unit has many significant advantages. It has multiple independent compressor units, which together drag a new type of water-fluorine heat exchanger. The cold and heat generated by the compressor It is simple and reliable, and the failure of one compressor will not affect the operation of the air conditioning system. Freon is on the outdoor side, the pipeline is short, and all the pipelines are welded, water is used as the refrigerant, the amount of fluorine refrigerant is small, and the possibility of fluorine leakage is greatly reduced, the safety is high, and the probability of fluorine pollution to the air-conditioning environment Greatly reduced. However, whether it is a variable frequency multi-connected or a variable capacity separate module heat pump unit, they are only cooling, heating and handling of hot and cold air; when cooling, a lot of heat is generated, and this heat is exhausted into the atmosphere for no use, so that the energy cannot be used. Take advantage of.

Chinese invention patent application CN101839586A discloses an "air source split compressor digital combination variable capacity heat pump hot water air conditioning system", which can provide domestic hot water while using the air conditioner. However, the system still has the following drawbacks:

1. There are two four-way valves in the system. In winter, when the domestic hot water temperature is low and the air-conditioning water temperature is high, and hot water is required to be produced, the temperature of the refrigerant in the hot water heat exchanger is low. The pressure is also low, and the refrigerant accumulates in the hot water heat exchanger, and the system will generate a low-pressure protection or a high-temperature protection, which may cause a protective shutdown.

2. Each compressor unit of the system is connected with a hot water heat exchanger, and the amount of hot water cannot be adjusted according to needs, so energy and hot water amount will be wasted when domestic hot water is produced.

3. The hot water heat exchanger of this system is separated from the hot water tank, and a water pump is required to drive tap water to circulate and heat between the water tank and the hot water heat exchanger. This will increase the cost and energy consumption of the system.

Utility model content

The technical problem to be solved by the utility model is to provide an air-source heat pump air-conditioning system that has better operational reliability and stability and can provide domestic hot water, so as to overcome the above-mentioned defects of the prior art.

In order to solve the above technical problems, the utility model adopts the following technical solutions: an air source heat pump air conditioning system that can provide domestic hot water, including a compressor, a gas-liquid separator, an expansion valve, a four-way valve, an outdoor unit heat exchanger, Indoor unit heat exchanger and hot water heat exchanger, the inlet pipe of the compressor is connected with the outlet pipe of the vapor-liquid separator, the outlet pipe of the compressor is connected with the inlet pipe of the first four-way valve, the first four-way The right pipe of the one-way valve is connected to the intake pipe of the second four-way valve through a one-way valve, and the left pipe of the first four-way valve is connected to the intake pipe of the third four-way valve through a hot water heat exchanger; The left pipe of the second four-way valve is connected to the heat exchanger of the indoor unit, and the right pipe of the second four-way valve is connected to the heat exchanger of the outdoor unit; The valve is connected with the heat exchanger of the outdoor unit; the right pipe of the third four-way valve is also connected with the intake pipe of the second four-way valve through a one-way valve, and the left pipe of the third four-way valve is connected through a one-way valve. The valve is connected with the liquid reservoir, and the intermediate pipes of the first four-way valve, the second four-way valve and the third four-way valve are all connected with the inlet pipe of the gas-liquid separator.

Preferably, a filter is provided on each side of the expansion valve.

Preferably, the expansion valve is an electronic expansion valve.

Preferably, the indoor unit heat exchanger is a spiral water flow shell-and-tube air conditioner heat exchanger.

Preferably, the outdoor unit heat exchanger is an internally threaded copper tube aluminum foil heat exchanger.

Preferably, the hot water heat exchanger is a coil-type water-fluorine heat exchanger, and the tap water inlet is located at the bottom of the coil-type water-fluorine heat exchanger.

Preferably, a hot water tank is also included, and the hot water heat exchanger is located inside the hot water tank.

More preferably, there are one or more air-source heat pump air-conditioning systems that can provide domestic hot water, and the one or more air-source heat pump air-conditioning systems that can provide domestic hot water share the same indoor unit heat exchanger and the same A hot water tank.

More preferably, it also includes one or more conventional air-source heat pump air-conditioning systems without hot water, and the air-source heat pump air-conditioning system without hot water shares the same indoor unit for heat exchange with the air-source heat pump air-conditioning system that can provide domestic hot water device.

Compared with the prior art, the utility model has significant progress: due to the adoption of a new pipeline with three four-way valves, the utility model can The temperature is controlled flexibly. When the domestic hot water temperature is low and the air-conditioning water temperature is high, the hot water heat exchanger can be used to condense separately, and there will be no protective shutdown failure; when the domestic hot water temperature is high and the air-conditioning water temperature is low , and when the air conditioner is required to be heated, it can be operated in series condensation (condensed through the hot water heat exchanger first, and then condensed through the indoor unit heat exchanger), which can not only meet domestic hot water heating, but also control the air temperature. adjust. This improves the reliability and stability of the air conditioning system.

Description of drawings

Fig. 1 is a schematic diagram of an air source heat pump air conditioning system capable of providing domestic hot water according to the present invention.

Fig. 2 is a schematic diagram of the working principle of the utility model when performing air heating.

Fig. 3 is a schematic diagram of the working principle of the utility model when a hot water heat exchanger is used for separate condensation.

Fig. 4 is a schematic diagram of the working principle of series condensation of the utility model when air heating and domestic hot water heating are performed at the same time.

Fig. 5 is a schematic diagram of the working principle of the utility model when performing air cooling.

Fig. 6 is a schematic diagram of the working principle of the utility model when domestic hot water is produced separately.

Fig. 7 is a schematic diagram of an air source variable capacity separated modular heat pump unit combined by the utility model.

Fig. 8 is a schematic diagram of a conventional air source heat pump air conditioning system without hot water.

In the picture:

1. The first four-way valve 2. The second four-way valve 3. The third four-way valve

4. Compressor 5. Vapor-liquid separator 6. Outdoor unit heat exchanger

7. Indoor unit heat exchanger 8. Hot water heat exchanger 9. Liquid reservoir

10. Expansion valve 11. Filter 12. Filter

13. One-way valve 14. One-way valve 15. One-way valve

1D, intake pipe 1C, left pipe 1S, middle pipe

1E, right pipe 2D, intake pipe 2C, left pipe

2S, middle pipe 2E, right pipe 3D, intake pipe

3C, left pipe 3S, middle pipe 3E, right pipe

100. The utility model can provide domestic hot water air source heat pump air conditioning system

200. Conventional air source heat pump air conditioning system without hot water

300. Indoor unit 400. Hot water tank 20. Four-way valve

Detailed ways

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can more clearly understand other advantages and effects of the utility model.

It should be noted that the structures, proportions, sizes, etc. shown in the accompanying drawings of the description are only used to cooperate with specific embodiments, so that those skilled in the art can better understand the concept of the utility model, and are not intended to limit the scope of the utility model. protected range. Any modification of structure, change of proportional relationship or adjustment of size shall still fall within the scope of protection of the present utility model without affecting the function and purpose of the present utility model. For ease of description, the relative positional relationship of each component is described according to the layout of the drawings in the specification, such as: the positional relationship of front, rear, top, bottom, left, right, etc. is based on the layout direction of the drawings in the specification to be sure.

As shown in Figure 1, the utility model is an air source heat pump air conditioning system 100 that can provide domestic hot water, including a compressor 4, a vapor-liquid separator 5, an expansion valve 10, four-way valves 1, 2, 3, and an outdoor unit Heat exchanger 6, indoor unit heat exchanger 7 and hot water heat exchanger 8. Wherein, the inlet pipe of the compressor 4 is connected with the outlet pipe of the gas-liquid separator 5, the outlet pipe of the compressor 4 is connected with the intake pipe 1D of the first four-way valve 1, and the right side pipe of the first four-way valve 1 1E is connected to the intake pipe 2D of the second four-way valve 2 through a one-way valve 13, and the left pipe 1C of the first four-way valve 1 is connected to the intake pipe 3D of the third four-way valve 3 through the hot water heat exchanger 8 The left pipe 2C of the second four-way valve 2 is connected with the heat exchanger 7 of the indoor unit, and the right pipe 2E of the second four-way valve 2 is connected with the heat exchanger 6 of the outdoor unit; the heat exchanger of the indoor unit The other end of 7 is connected to the other end of the outdoor unit heat exchanger 6 through the liquid reservoir 9 and the expansion valve 10 in turn; the right pipe 3E of the third four-way valve 3 is also connected to the second four-way valve 14 The intake pipe 2D of the through valve 2 is connected, the left pipe 3C of the third four-way valve 3 is connected with the liquid reservoir 9 through a one-way valve 15, the first four-way valve 1, the second four-way valve 2 and the first four-way valve The intermediate pipes 1S, 2S and 3S of the three-way valve 3 are all connected to the inlet pipe of the vapor-liquid separator 5 . The above-mentioned components are connected through pipelines to form a refrigerant circulation pipeline. In order to ensure the cleanness of the refrigerant, it is preferable to arrange a filter 11 and 12 on both sides of the expansion valve 10 .

Preferably, the expansion valve 10 is an electronic expansion valve.

Preferably, the indoor unit heat exchanger 7 adopts a spiral water flow shell-and-tube air conditioner heat exchanger.

Preferably, the outdoor unit heat exchanger 6 adopts an internally threaded copper tube aluminum foil heat exchanger.

Preferably, the hot water heat exchanger 8 adopts a coil-type water-fluorine heat exchanger, and the tap water inlet is located at the bottom of the coil-type water-fluorine heat exchanger. A hot water tank is also included, and the hot water heat exchanger 8 is arranged inside the hot water tank. Using the natural convection principle that the density of tap water decreases during the heating process and naturally flows upward under the action of buoyancy, the tap water is introduced into the bottom of the coiled water fluorine heat exchanger through the pipe, so that the tap water can flow naturally during the heating process. Up flow, just enter water tank after coming out from hot water heat exchanger 8 and store. The water pump of the domestic water system is eliminated, and the energy consumption of the system is reduced.

According to changes in seasons or different requirements for use, the air source heat pump air conditioning system of the present utility model can operate in a variety of different modes.

1. When indoor air is heated in winter, as shown in Figure 2: the low-pressure and low-temperature refrigerant gas becomes high-pressure and high-temperature gas after being compressed by the compressor 4, and then passes through the intake pipe 1D of the first four-way valve 1, the right side Pipe 1E and one-way valve 13, then through the intake pipe 2D of the second four-way valve 2, the left pipe 2C, along the pipeline to the heat exchanger 7 of the indoor unit to transfer heat to the water of the air conditioning system, and then through the indoor unit heat exchanger After the heat exchange of the heater 7, the refrigerant becomes a high-pressure and low-temperature liquid, and after being filtered by the filter 11, the refrigerant becomes a low-temperature and low-pressure gas-liquid mixture through the action of throttling and decompression by the expansion valve 10 . The low-temperature and low-pressure gas-liquid mixture passes through the heat exchanger 6 of the outdoor unit to become a low-pressure and low-temperature gas, and then returns to the gas-liquid separator 5 through the right pipe 2E and the middle pipe 2S of the second four-way valve 2 . Finally return to the compressor 4 through the pipeline, thus completing the air heating cycle.

2. When indoor air is heated in winter and domestic hot water is to be produced, the system flexibly controls the temperature of the hot water heat exchanger 8 , the indoor unit heat exchanger 7 and the outdoor unit heat exchanger 6 .

As shown in Figure 3: when the domestic hot water temperature is low and the air-conditioning water temperature is high, a hot water heat exchanger can be used to condense separately: the low-pressure and low-temperature refrigerant gas is compressed by the compressor 4 and becomes a high-pressure and high-temperature gas, which in turn After passing through the intake pipe 1D of the first four-way valve 1 and the left pipe 1C, it reaches the hot water heat exchanger 8. After heating the hot water, the refrigerant becomes a high-pressure and low-temperature liquid, and then passes through the intake pipe of the third four-way valve 3 3D, the left pipe 3C and the one-way valve 15 enter the accumulator 9, and after being filtered by the filter 11, the expansion valve 10 throttles and depressurizes, and the refrigerant becomes a low-temperature and low-pressure gas-liquid mixture, and enters the outdoor unit The heat exchanger 6 absorbs heat from the outdoor environment. The low-temperature and low-pressure gas-liquid mixture passes through the heat exchanger 6 of the outdoor unit to absorb heat and becomes a low-pressure and low-temperature gas, and then passes through the right pipe 2E of the second four-way valve 2, The intermediate pipe 2S returns to the gas-liquid separator 5, and finally returns to the compressor 4 through the pipeline, thus completing the cycle of heating hot water.

As shown in Figure 4, when the domestic hot water temperature is high and the air conditioner water temperature is low, use or switch to series condensation: the low-pressure and low-temperature refrigerant gas is compressed by the compressor 4 and becomes a high-pressure and high-temperature gas, and then passes through the first The intake pipe 1D and the left pipe 1C of the four-way valve 1 reach the hot water heat exchanger 8. After the hot water is heated, the refrigerant becomes a high-pressure and low-temperature liquid, and then passes through the intake pipe 3D and the right pipe of the third four-way valve 3. The side pipe 3E and the one-way valve 14 reach the second four-way valve 2, pass through the middle pipe 2D and the left pipe 2C of the second four-way valve 2, reach the heat exchanger 7 of the indoor unit for further condensation, and then return to the liquid reservoir 9 , and then filtered by the filter 11, the refrigerant becomes a low-temperature and low-pressure gas-liquid mixture and enters the outdoor unit heat exchanger 6 to absorb heat from the outdoor environment, and the low-temperature and low-pressure gas The liquid mixture passes through the heat exchanger 6 of the outdoor unit and turns into a low-pressure and low-temperature gas, and then returns to the gas-liquid separator 5 through the right pipe 2E and the middle pipe 2S of the second four-way valve 2, and finally passes through the pipeline Get back to the compressor 4, so that the cycle of heating domestic hot water and air-conditioning hot water has been completed. It can realize both domestic hot water heating and air conditioning heating. This operation mode can greatly improve the reliability and stability of the air conditioning system operation.

3. During indoor air cooling in summer, as shown in Figure 5: the low-pressure and low-temperature refrigerant gas becomes high-pressure and high-temperature gas after being compressed by the compressor 4, and then passes through the intake pipe 1D of the first four-way valve 1 and the left pipe 1C , reaches the hot water heat exchanger 8, after heating the hot water, reaches the third four-way valve 3, and is divided into two paths: one path of uncondensed gas refrigerant passes through the intake pipe 3D of the third four-way valve 3, the right pipe 3E and The one-way valve 14 enters the second four-way valve 2, passes through the intake pipe 2D of the second four-way valve 2, and the right pipe 2E to the outdoor unit heat exchanger 6. After cooling and condensing, the refrigerant becomes a high-pressure and low-temperature liquid. After being filtered by the filter 12 and throttling and decompressing by the expansion valve 10, the refrigerant becomes a low-pressure and low-temperature gas-liquid mixture and enters the liquid receiver 9; the other condensed liquid refrigerant flows from the third four-way valve The left side pipe 3C, through the one-way valve 15, merges with the refrigerant passing through the accumulator 9, enters the heat exchanger 7 of the indoor unit together to absorb heat, becomes a low-pressure and low-temperature gas, and passes through the second four-way valve 2 The right side pipe 2C and the middle pipe 2S return to the gas-liquid separator 5, and finally enter the compressor 4 through the pipeline, so that the refrigeration cycle is completed and the domestic water is heated for free at the same time.

4. Separately make hot water during the season change period or the time period when the air conditioner is not in use, as shown in Figure 6: the low-pressure and low-temperature refrigerant gas is compressed by the compressor 4 and becomes a high-pressure and high-temperature gas, and then passes through the first four-way The intake pipe 1D and the left pipe 1C of the valve 1 reach the hot water heat exchanger 8. After the hot water is heated, the refrigerant becomes a high-pressure and low-temperature liquid, and then passes through the intake pipe 3D and the left pipe of the third four-way valve 3. 3C and the one-way valve 15 enter the accumulator 9, and after being filtered by the filter 11, the expansion valve 10 throttles and depressurizes the refrigerant. The refrigerant becomes a low-temperature and low-pressure gas-liquid mixture and enters the outdoor unit heat exchanger 6. Absorbing heat from the outdoor environment, the low-temperature and low-pressure gas-liquid mixture passes through the heat exchanger 6 of the outdoor unit to absorb heat and becomes a low-pressure and low-temperature gas, and then passes through the right pipe 2E and middle pipe 2S of the second four-way valve 2 to return to the The gas-liquid separator 5 finally enters the compressor 4 through the pipeline, thus completing the cycle of heating hot water. During this process, heat is absorbed from the outdoor environment through the outdoor unit heat exchanger 6 and finally released into the hot water heat exchanger 8 to heat domestic water.

As shown in Figure 7, multiple air source heat pump air conditioning systems 100 that can provide domestic hot water can be combined into air source variable capacity separate modular heat pump units, and each air source heat pump air conditioning system 100 that can provide domestic hot water is referred to as It is a hot water single system, multiple hot water single systems 100 share the same indoor unit heat exchanger 7 and the same hot water tank 400, and the hot water heat exchangers of each hot water single system 100 are installed in the hot water tank 400's interior. Depending on the demand for domestic hot water, one or more hot water single systems 100 can be selectively connected to a hot water heat exchanger. The hot water supply can be determined according to the needs, and the hot water will not be provided if no hot water is needed, which saves energy.

Further, it may also include one or more conventional air-source heat pump air-conditioning systems 200 without hot water. The air-source heat pump air-conditioning system 200 and the hot water single system 100 also share the same indoor unit heat exchanger 7 . Under the action of the circulation pump, the heat or cold of the heat exchanger 7 of the indoor unit is transferred to the indoor unit 300 through the water medium.

An air-source heat pump air-conditioning system 200 without hot water is a well-known technology in the art. As shown in FIG. Through valve 20, outdoor unit heat exchanger 6 and indoor unit heat exchanger 7. The compressor 4 is connected to the vapor-liquid separator 5, the compressor 4, the vapor-liquid separator 5, the outdoor unit heat exchanger 6 and the indoor unit heat exchanger 7 are all connected to the four-way valve 20, and the indoor unit heat exchanger 7 It is connected with the heat exchanger 6 of the outdoor unit through the liquid reservoir 9, the filter 11, the expansion valve 10 and the filter 12 in sequence. By switching the four-way valve 20, the air conditioning system can be operated in cooling mode or heating mode.

Claims (9)

1. air-source heat pump air conditioning system that the domestic hot-water can be provided, comprise compressor (4), vapour liquid separator (5), expansion valve (10), cross valve, off-premises station heat exchanger (6), indoor set heat exchanger (7) and hot water heat exchanger (8), it is characterized in that, the inlet tube of described compressor (4) is connected with the outlet of vapour liquid separator (5), the outlet of compressor (4) is connected with the air inlet pipe (1D) of first cross valve (1), the right side pipe (1E) of first cross valve (1) is connected with the air inlet pipe (2D) of second cross valve (2) by a check valve (13), and the left side pipe (1C) of first cross valve (1) is connected with the air inlet pipe (3D) of the 3rd cross valve (3) by hot water heat exchanger (8); The left side pipe (2C) of second cross valve (2) is connected with indoor set heat exchanger (7), and the right side pipe (2E) of second cross valve (2) is connected with off-premises station heat exchanger (6); Described indoor set heat exchanger (7) is connected with off-premises station heat exchanger (6) by reservoir (9), expansion valve (10) successively; The right side pipe (3E) of the 3rd cross valve (3) also is connected with the air inlet pipe (2D) of second cross valve (2) by a check valve (14), the left side pipe (3C) of the 3rd cross valve (3) is connected with reservoir (9) by a check valve (15), and the intervalve (1S, 2S, 3S) of first cross valve (1), second cross valve (2) and the 3rd cross valve (3) all is connected with the inlet tube of vapour liquid separator (5).

2. air-source heat pump air conditioning system according to claim 1 is characterized in that, respectively is provided with a filter (11,12) in the both sides of expansion valve (10).

3. air-source heat pump air conditioning system according to claim 1 is characterized in that, described expansion valve is electric expansion valve.

4. air-source heat pump air conditioning system according to claim 1 is characterized in that, described indoor set heat exchanger (7) is spiral water flow package air-condition heat exchanger.

5. air-source heat pump air conditioning system according to claim 1 is characterized in that, described off-premises station heat exchanger (6) is inner screw thread copper pipe aluminium foil heat exchanger.

6. air-source heat pump air conditioning system according to claim 1 is characterized in that, described hot water heat exchanger (8) is coiled water fluorine heat exchanger, and the running water entrance is positioned at the bottom of coiled water fluorine heat exchanger.

7. air-source heat pump air conditioning system according to claim 1 is characterized in that, also comprises a boiler (400), and described hot water heat exchanger (8) is positioned at the inside of boiler (400).

8. air-source heat pump air conditioning system according to claim 7, it is characterized in that, the described air-source heat pump air conditioning system (100) that the domestic hot-water is provided is for one or more, and described one or more air-source heat pump air conditioning systems (100) of domestic hot-water that provide share same indoor set heat exchanger (7) and same boiler (400).

9. air-source heat pump air conditioning system according to claim 8, it is characterized in that, the no hot water air-source heat pump air conditioning system (200) that also comprises one or more routines, described no hot water air-source heat pump air conditioning system (200) shares same indoor set heat exchanger (7) with the air-source heat pump air conditioning system (100) that the domestic hot-water can be provided.

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