Air source heat pump unit with three-temperature function

Abstract

The invention discloses an air source heat pump unit with a three-temperature function. The air source heat pump unit comprises an air conditioner side compressor. The heat recovery heat exchanger is communicated with the air outlet end of the air conditioner side compressor; the domestic hot water temperature adjusting system is communicated with the air conditioner side compressor through the heat recovery heat exchanger, and the domestic hot water temperature adjusting system comprises a domestic hot water side heat exchanger; the air conditioner air disc temperature adjusting system is communicated with the air conditioner side compressor through the heat recovery heat exchanger, and the air conditioner air disc temperature adjusting system comprises an air conditioner air disc side heat exchanger; the air conditioner floor heating temperature adjusting system is communicated with the air conditioner side compressor through the heat recovery heat exchanger, and the air conditioner floor heating temperature adjusting system comprises an air conditioner floor heating side heat exchanger. By arranging the domestic hot water temperature adjusting system, the air conditioner wind disc temperature adjusting system and the air conditioner floor heating temperature adjusting system, output of three temperatures can be achieved, temperature adjustment of domestic hot water, a fan coil and floor heating is met, multi-temperature output is achieved, different use requirements are met, and cost is greatly saved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning systems, and particularly relates to an air source heat pump unit with a three-temperature function. Background Art

[0002] At present, most of the air source heat pump units on the market adopt a single-way and single-water-temperature water outlet method. When it is necessary to supply domestic hot water, floor heating, and air temperature adjustment in life, different heat pumps need to be used for water supply, which greatly increases the cost and requires a large heat pump installation space. There are also heat pumps on the market that can achieve dual-temperature water outlet. For example, the application number 202023283860.0 discloses a variable-frequency air source heat pump system with dual-water-temperature water outlet, which can provide low-temperature chilled water and high-temperature cooling water, one with a high water temperature and one with a low water temperature. When in use, when the requirements are for heating and other environmental uses, the use requirements cannot be met. Summary of the Invention

[0003] The purpose of the present invention is to provide an air source heat pump unit with a three-temperature function that can solve the above problems.

[0004] According to one aspect of the present invention, there is provided an air source heat pump unit with a three-temperature function, including:

[0005] An air-conditioning side compressor;

[0006] A heat recovery heat exchanger, which is connected to the outlet end of the air-conditioning side compressor;

[0007] A domestic hot water temperature adjustment system, which is connected to the air-conditioning side compressor through the heat recovery heat exchanger. The domestic hot water temperature adjustment system includes a domestic hot water side heat exchanger, a domestic hot water inlet is provided on the domestic hot water side heat exchanger, and a domestic hot water outlet is provided on the heat recovery heat exchanger;

[0008] An air-conditioning air handling unit temperature adjustment system, which is connected to the air-conditioning side compressor through the heat recovery heat exchanger. The air-conditioning air handling unit temperature adjustment system includes an air-conditioning air handling unit side heat exchanger, an air-conditioning air handling unit side outlet and an air-conditioning air handling unit side return port are provided on the air-conditioning air handling unit side heat exchanger;

[0009] An air-conditioning floor heating temperature adjustment system, which is connected to the air-conditioning side compressor through the heat recovery heat exchanger. The air-conditioning floor heating temperature adjustment system includes an air-conditioning floor heating side heat exchanger, and an air-conditioning floor heating side outlet and an air-conditioning floor heating side return port are included in the air-conditioning floor heating side heat exchanger.

[0010] In some embodiments, the temperature regulation system of the air-conditioning air handling unit is as follows: the outlet end of the compressor on the air-conditioning side is connected to the heat recovery heat exchanger, the first outlet of the heat recovery heat exchanger is connected to the four-way valve on the air-conditioning side, the C port of the four-way valve on the air-conditioning side is sequentially connected to the heat exchanger on the air-conditioning air handling unit side, the economizer, the fin heat exchanger on the air-conditioning side, the E port of the four-way valve on the air-conditioning side, and the suction end of the compressor on the air-conditioning side.

[0011] In some embodiments, the temperature regulation system of the air-conditioning air handling unit further includes a refrigeration expansion valve on the air-conditioning air handling unit side, a first check valve, an injection-enhanced enthalpy expansion valve, a heating expansion valve on the air-conditioning side, and a second check valve. The refrigeration expansion valve on the air-conditioning air handling unit side is connected in parallel with the first check valve and is arranged between the heat exchanger on the air-conditioning air handling unit side and the economizer. The first check valve conducts from the heat exchanger on the air-conditioning air handling unit side to the economizer side. The injection-enhanced enthalpy expansion valve is connected to the first outlet of the economizer. The heating expansion valve on the air-conditioning side is connected in parallel with the second check valve and is arranged between the fin heat exchanger on the air-conditioning side and the injection-enhanced enthalpy expansion valve.

[0012] In some embodiments, the temperature regulation system of the air-conditioning floor heating is as follows: the outlet end of the compressor on the air-conditioning side is connected to the heat recovery heat exchanger, the first outlet of the heat recovery heat exchanger is connected to the four-way valve on the air-conditioning side, the C port of the four-way valve on the air-conditioning side is sequentially connected to the heat exchanger on the air-conditioning floor heating side, the economizer, the fin heat exchanger on the air-conditioning side, the E port of the four-way valve on the air-conditioning side, and the suction end of the compressor on the air-conditioning side.

[0013] In some embodiments, the temperature regulation system of the air-conditioning floor heating further includes a third check valve, a fourth check valve, a fifth check valve, and an expansion valve on the air-conditioning floor heating side. The third check valve is connected in parallel with the fourth check valve, and the directions of the two are opposite. The third check valve and the fourth check valve are arranged between the four-way valve on the air-conditioning side and the heat exchanger on the air-conditioning floor heating side. The fifth check valve is connected in parallel with the expansion valve on the air-conditioning floor heating side and is arranged between the heat exchanger on the air-conditioning floor heating side and the economizer. The fifth check valve conducts from the heat exchanger on the air-conditioning floor heating side to the economizer side.

[0014] In some embodiments, an air source heat pump unit with a three-temperature function further includes a heat exchange fan, and the heat exchange fan corresponds to the fin heat exchanger on the air-conditioning side.

[0015] In some embodiments, the temperature regulation system of the domestic hot water is as follows: the outlet end of the compressor on the air-conditioning side is connected to the heat recovery heat exchanger, and the second outlet of the heat recovery heat exchanger is connected to the heat exchanger on the domestic hot water side.

[0016] In some embodiments, the domestic hot water temperature regulation system further includes a temperature supplement module. The temperature supplement module includes a domestic hot water side compressor, a domestic hot water side four-way valve, a domestic hot water side finned heat exchanger, and a domestic hot water side expansion valve. The domestic hot water side compressor is connected to the domestic hot water side four-way valve. The C port of the domestic hot water side four-way valve is sequentially connected to the domestic hot water side heat exchanger, the domestic hot water side expansion valve, the domestic hot water side finned heat exchanger, the E port of the domestic hot water side four-way valve, and the suction end of the domestic hot water side compressor.

[0017] In some embodiments, the air source heat pump unit with three-temperature functions further includes a domestic hot water side gas-liquid separator and an air-conditioning side gas-liquid separator. An air-conditioning side gas-liquid separator is provided between the air-conditioning side four-way valve and the suction end of the air-conditioning side compressor, and a domestic hot water side gas-liquid separator is provided between the domestic hot water side four-way valve and the suction end of the domestic hot water side compressor.

[0018] In some embodiments, an air source heat pump unit with three-temperature functions further includes filters. There are multiple filters, and each corresponding expansion valve is connected to a filter.

[0019] The beneficial effects of the present invention are as follows:

[0020] 1. By providing a domestic hot water temperature regulation system, an air-conditioning fan coil temperature regulation system, and an air-conditioning floor heating temperature regulation system, the output of three temperatures can be achieved, meeting the temperature regulation requirements of domestic hot water, fan coils, and floor heating, realizing multi-temperature output, meeting different usage requirements, and greatly saving costs;

[0021] 2. Through the structures of the air-conditioning fan coil temperature regulation system, heating in winter and cooling in summer can be achieved, that is, the cooling and heating requirements of the fan coil can be met, the cooling or heating requirements of the air can be realized, and the temperature is adjustable;

[0022] 3. Through the structures of the air-conditioning floor heating temperature regulation system, different water temperatures for cooling or heating can be output, facilitating the cooling and temperature reduction or heating of the floor heating, and meeting the cooling and heating requirements;

[0023] 4. For the domestic hot water temperature regulation system, during use, heat exchange is carried out through the heat recovery heat exchanger, which can heat the domestic hot water and increase the temperature of the domestic hot water;

[0024] 5. By providing a temperature supplement module, through the domestic hot water side compressor, the domestic hot water side finned heat exchanger, and the domestic hot water side heat exchanger, the domestic hot water can be further heated. When the heating temperature of the domestic hot water by the heat recovery heat exchanger cannot meet the temperature usage requirements, the temperature supplement module can further warm the domestic hot water to meet the corresponding usage temperature requirements;

[0025] 6. The entire unit can simultaneously achieve three temperature outputs, and the three temperatures meet different output temperature requirements without the need to use multiple heat pump units, greatly saving costs and reducing the space occupied by the entire unit. Description of the Drawings

[0026] Figure 1 It is a schematic diagram of the principle of an air source heat pump unit with a three-temperature function of the present invention. Detailed Implementation Modes

[0027] The present invention will be further described in detail below with reference to the drawings.

[0028] Refer to Figure 1 An air source heat pump unit with a three-temperature function, comprising:

[0029] An air-conditioning side compressor 1;

[0030] A heat recovery heat exchanger 2, which is connected to the outlet end of the air-conditioning side compressor 1;

[0031] A domestic hot water temperature regulation system 3, which is connected to the air-conditioning side compressor 1 through the heat recovery heat exchanger 2. The domestic hot water temperature regulation system 3 includes a domestic hot water side heat exchanger 31, a domestic hot water inlet 32 is provided on the domestic hot water side heat exchanger 31, and a domestic hot water outlet 33 is provided on the heat recovery heat exchanger 2;

[0032] An air-conditioning air panel temperature regulation system 4, which is connected to the air-conditioning side compressor 1 through the heat recovery heat exchanger 2. The air-conditioning air panel temperature regulation system 4 includes an air-conditioning air panel side heat exchanger 41, an air-conditioning air panel side outlet 42 and an air-conditioning air panel side return port 43 are provided on the air-conditioning air panel side heat exchanger 41;

[0033] An air-conditioning floor heating temperature regulation system 5, which is connected to the air-conditioning side compressor 1 through the heat recovery heat exchanger 2. The air-conditioning floor heating temperature regulation system 5 includes an air-conditioning floor heating side heat exchanger 51, and an air-conditioning floor heating side outlet 52 and an air-conditioning floor heating side return port 53 are included in the air-conditioning floor heating side heat exchanger 51.

[0034] In the present invention, the power of the air-conditioning side compressor 1 can be increased or decreased accordingly according to the specific usage place to meet the heating and cooling requirements of different scenarios. When the air-source heat pump unit with a three-temperature function is in use, the refrigerant output by the air-conditioning side compressor 1 can be heat-exchanged through the heat recovery heat exchanger 2 to heat the domestic hot water, and the heated water is output for use through the domestic hot water outlet 33. The air-conditioning fan coil temperature regulation system 4 exchanges heat through the air-conditioning fan coil side heat exchanger 41, so that the cooled or heated water is output through the air-conditioning fan coil side outlet 42 to realize the cooling or heating of the air-conditioning fan coil and meet the temperature regulation requirements. The air-conditioning floor heating temperature regulation system 5 exchanges heat through the air-conditioning floor heating side heat exchanger 51, and the cooled or heated water is output through the air-conditioning floor heating side outlet 52, which is convenient to provide the cooled or heated water for the floor heating to meet the cooling or heating effect of the floor heating and meet the temperature regulation usage requirements in different seasons.

[0035] The air-conditioning fan coil temperature regulation system 4 is configured as follows: the outlet end of the air-conditioning side compressor 1 is communicated with the heat recovery heat exchanger 2, the first outlet of the heat recovery heat exchanger 2 is communicated with the air-conditioning side four-way valve 6, the C port of the air-conditioning side four-way valve 6 is sequentially communicated with the air-conditioning fan coil side heat exchanger 41, the economizer 7, the air-conditioning side fin heat exchanger 8, the E port of the air-conditioning side four-way valve 6, and the suction end of the air-conditioning side compressor 1.

[0036] The air-conditioning fan coil temperature regulation system 4 further includes an air-conditioning fan coil side refrigeration expansion valve 44, a first check valve 45, a liquid injection and enthalpy increase expansion valve 46, an air-conditioning heating expansion valve 47, and a second check valve 48. The air-conditioning fan coil side refrigeration expansion valve 44 is connected in parallel with the first check valve 45 and is arranged between the air-conditioning fan coil side heat exchanger 41 and the economizer 7. The first check valve 45 is conducted from the air-conditioning fan coil side heat exchanger 41 to the economizer 7 side. The liquid injection and enthalpy increase expansion valve 46 is communicated with the first outlet of the economizer 7. The air-conditioning heating expansion valve 47 is connected in parallel with the second check valve 48 and is arranged between the air-conditioning side fin heat exchanger 8 and the liquid injection and enthalpy increase expansion valve 46.

[0037] When the air-conditioning fan coil temperature regulation system 4 is in use, it can cool or heat the fan coil, that is, low-temperature water or heated water can be output through the air-conditioning fan coil side outlet 42. Specifically as follows:

[0038] When the air-conditioning fan coil temperature regulation system 4 needs to output heated water, i.e., when it is used in a low-temperature environment such as in winter, the refrigerant of the air-conditioning side compressor 1 passes through the heat recovery heat exchanger 2 for preliminary heat exchange, and then flows to the air-conditioning fan coil side heat exchanger 41 through port C of the air-conditioning side four-way valve 6; at this time, the low-temperature water flowing into the air-conditioning fan coil side heat exchanger 41 through the air-conditioning fan coil side return water port 43 exchanges heat at the air-conditioning fan coil side heat exchanger 41, so that the temperature rises, and thus the water flowing out of the air-conditioning fan coil side outlet 42 is heated up, realizing the heating of the air-conditioning fan coil. After the refrigerant flows out of the air-conditioning fan coil side heat exchanger 41, it is transported to the air-conditioning heating expansion valve 47 after passing through the first one-way valve 45, and is transported to the air-conditioning side fin heat exchanger 8 for heat exchange. At this time, the second one-way valve 48 is not conducting. The refrigerant after heat exchange at the air-conditioning side fin heat exchanger 8 flows in through port E of the air-conditioning side four-way valve 6 and finally returns to the air-conditioning side compressor 1, and so on in a cycle to complete the heating of the fan coil.

[0039] Conversely, when the air-conditioning fan coil temperature regulation system 4 needs to output chilled water, i.e., when it is used in a high-temperature environment such as in summer, the refrigerant of the air-conditioning side compressor 1 passes through the heat recovery heat exchanger 2 for preliminary heat exchange, and then is transported to the air-conditioning side fin heat exchanger 8 for heat exchange through port E of the air-conditioning side four-way valve 6, and then is transported to the air-conditioning fan coil side refrigeration expansion valve 44 through the second one-way valve 48, and is sent to the air-conditioning fan coil side heat exchanger 41 for heat exchange, so that the inflowing higher-temperature water is cooled through heat exchange, and the chilled water flows out after being cooled, realizing the cooling of the air-conditioning fan coil. The refrigerant after heat exchange at the air-conditioning fan coil side heat exchanger 41 flows in through port C of the air-conditioning side four-way valve 6 and finally returns to the air-conditioning side compressor 1, realizing the cooling of the fan coil.

[0040] During actual use, when heating at low temperature, the liquid injection and enthalpy-increasing expansion valve 46 is opened, and the air-conditioning side compressor 1 is directly connected to the economizer 7 to accelerate heat exchange.

[0041] The air-conditioning and floor heating temperature regulation system 5 is: the outlet end of the air-conditioning side compressor 1 is connected to the heat recovery heat exchanger 2, the first outlet of the heat recovery heat exchanger 2 is connected to the air-conditioning side four-way valve 6, and port C of the air-conditioning side four-way valve 6 is sequentially connected to the air-conditioning and floor heating side heat exchanger 51, the economizer 7, the air-conditioning side fin heat exchanger 8, port E of the air-conditioning side four-way valve 6, and the suction end of the air-conditioning side compressor 1.

[0042] The air-conditioning and floor heating temperature regulation system 5 further includes a third check valve 54, a fourth check valve 55, a fifth check valve 56, and an air-conditioning and floor heating side expansion valve 57. The third check valve 54 and the fourth check valve 55 are connected in parallel, and their directions are opposite. The third check valve 54 and the fourth check valve 55 are arranged between the air-conditioning side four-way valve 6 and the air-conditioning and floor heating side heat exchanger 51. The fifth check valve 56 and the air-conditioning and floor heating side expansion valve 57 are connected in parallel and are arranged between the air-conditioning and floor heating side heat exchanger 51 and the economizer 7. The fifth check valve 56 is conducted from the air-conditioning and floor heating side heat exchanger 51 to the economizer 7 side.

[0043] When the present invention is in use, it can cool or heat the floor heating, that is, low-temperature water or heated water can be output through the air-conditioning and floor heating side water outlet 52. The specific cooling or heating process is as follows:

[0044] When the air-conditioning and floor heating temperature regulation system 5 needs to output heated water, that is, when it is used in a low-temperature environment such as winter, the refrigerant of the air-conditioning side compressor 1 undergoes preliminary heat exchange through the heat recovery heat exchanger 2, and then flows through the C port of the air-conditioning side four-way valve 6 through the fourth check valve 55 to the air-conditioning and floor heating side heat exchanger 51. At this time, the low-temperature water flowing in through the air-conditioning and floor heating side water return port 53 undergoes heat exchange at the air-conditioning and floor heating side heat exchanger 51, so that the water temperature rises, and the water temperature of the water flowing out through the air-conditioning and floor heating side water outlet 52 rises, which is conducive to realizing the heating effect of the floor heating. When the refrigerant flows out of the air-conditioning and floor heating side heat exchanger 51, it passes through the fifth check valve 56 and then passes through the economizer 7; then it enters the air-conditioning side finned heat exchanger 8 through the air-conditioning heating expansion valve 47 for heat exchange. At this time, the second check valve 48 is not conducted. The refrigerant after heat exchange at the air-conditioning side finned heat exchanger 8 flows in through the E port of the air-conditioning side four-way valve 6 and finally returns to the air-conditioning side compressor 1, and so on in a cycle to complete the heating of the floor heating.

[0045] On the contrary, when the air-conditioning and floor heating temperature regulation system 5 needs to output chilled water, that is, when it is used in a high-temperature environment such as summer, the refrigerant of the air-conditioning side compressor 1 undergoes preliminary heat exchange through the heat recovery heat exchanger 2, and then is transported to the air-conditioning side finned heat exchanger 8 through the E port of the air-conditioning side four-way valve 6 for heat exchange, and then is transported to the air-conditioning and floor heating side cooling expansion valve 57 through the second check valve 48 and sent to the air-conditioning and floor heating side heat exchanger 51 for heat exchange, so that the inflowing higher-temperature water is cooled through heat exchange, and the chilled water after cooling flows out to realize the cooling of the floor heating. The refrigerant after heat exchange at the air-conditioning and floor heating side heat exchanger 51 flows in through the C port of the air-conditioning side four-way valve 6 and finally returns to the air-conditioning side compressor 1 to realize the cooling of the fan coil unit.

[0046] The air source heat pump unit with a three-temperature function of the present invention further includes a heat exchange fan 9, and the heat exchange fan 9 corresponds to the air-conditioning side finned heat exchanger 8. Therefore, during use, through the heat exchange fan 9, it can act on the air-conditioning side finned heat exchanger 8 to accelerate the heat exchange efficiency at the air-conditioning side finned heat exchanger 8.

[0047] The domestic hot water temperature regulation system 3 is as follows: The outlet end of the air-conditioning side compressor 1 is communicated with the heat recovery heat exchanger 2, and the second outlet of the heat recovery heat exchanger 2 is communicated with the domestic hot water side heat exchanger 31.

[0048] The domestic hot water temperature regulation system 3 further includes a temperature supplement module 34. The temperature supplement module 34 includes a domestic hot water side compressor 35, a domestic hot water side four-way valve 36, a domestic hot water side finned heat exchanger 37, and a domestic hot water side expansion valve 38. The domestic hot water side compressor 35 is communicated with the domestic hot water side four-way valve 36. The C port of the domestic hot water side four-way valve 36 is sequentially communicated with the domestic hot water side heat exchanger 31, the domestic hot water side expansion valve 38, the domestic hot water side finned heat exchanger 37, the E port of the domestic hot water side four-way valve 36, and the suction end of the domestic hot water side compressor 35.

[0049] The heating process of the domestic hot water temperature regulation system 3 is as follows: Water with a relatively low temperature enters the domestic hot water side heat exchanger 31 through the domestic hot water inlet 32 and is then transported to the heat recovery heat exchanger 2. When the air-conditioning side compressor 1 is working, the refrigerant undergoes heat exchange through the heat recovery heat exchanger 2 to heat the flowing water, and the heated domestic hot water can be obtained and output through the domestic hot water outlet 33 on the heat recovery heat exchanger 2.

[0050] When the heat exchange carried out at the heat recovery heat exchanger 2 cannot heat the domestic hot water to the required temperature, the domestic hot water side compressor 35 is started. The refrigerant output by the domestic hot water side compressor 35 is transported to the domestic hot water side heat exchanger 31 through the C port of the domestic hot water side four-way valve 36. Heat exchange is carried out through the domestic hot water side heat exchanger 31, so that the low-temperature water input on the domestic hot water side is heated after heat exchange. After the water is heated, it is transported to the heat recovery heat exchanger 2 and then output to realize the heating of the domestic hot water. When the refrigerant passes through the domestic hot water side heat exchanger 31, it is then transported to the domestic hot water side finned heat exchanger 37 through the domestic hot water side expansion valve 38, and then returns through the E port of the domestic hot water side four-way valve 36, and finally returns to the domestic hot water side compressor 35 after passing through the domestic hot water side four-way valve 36, realizing the heating of the domestic hot water.

[0051] The air source heat pump unit with a three-temperature function of the present invention further includes a domestic hot water side gas-liquid separator 10 and an air-conditioning side gas-liquid separator 20. An air-conditioning side gas-liquid separator 20 is provided between the four-way valve 6 on the air-conditioning side and the suction end of the air-conditioning side compressor 1, and a domestic hot water side gas-liquid separator 10 is provided between the four-way valve 36 on the domestic hot water side and the suction end of the domestic hot water side compressor 35. Thus, by providing the domestic hot water side gas-liquid separator 10 and the air-conditioning side gas-liquid separator 20, the refrigerant finally flowing back to the domestic hot water side compressor 35 and the air-conditioning side compressor 1 can be separated into gas and liquid, ensuring the normal use of each compressor.

[0052] An air source heat pump unit with a three-temperature function further includes filters 30. There are multiple filters 30, and each corresponding expansion valve is communicated with a filter 30. Thus, impurities can be filtered to prevent the impurities from entering each expansion valve, playing a protective role for the expansion valve and ensuring the normal service life of the expansion valve.

[0053] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. An air source heat pump unit with three-temperature function, characterized in that: include: Air conditioning side compressor (1); A heat recovery heat exchanger (2) is connected to the air outlet end of the air-conditioning side compressor (1); A domestic hot water temperature regulating system (3) is connected to the air-conditioning side compressor (1) through the heat recovery heat exchanger (2), the domestic hot water temperature regulating system (3) comprises a domestic hot water side heat exchanger (31), the domestic hot water side heat exchanger (31) is provided with a domestic hot water inlet (32), and the heat recovery heat exchanger (2) is provided with a domestic hot water outlet (33); An air conditioning fan disk temperature adjustment system (4) is connected to the air conditioning side compressor (1) through the heat recovery heat exchanger (2), the air conditioning fan disk temperature adjustment system (4) comprises an air conditioning fan disk side heat exchanger (41), and the air conditioning fan disk side heat exchanger (41) is provided with an air conditioning fan disk side water outlet (42) and an air conditioning fan disk side water return outlet (43); The air-conditioning floor heating temperature regulating system (5) is connected to the air-conditioning side compressor (1) through the heat recovery heat exchanger (2), and the air-conditioning floor heating temperature regulating system (5) comprises an air-conditioning floor heating side heat exchanger (51), and the air-conditioning floor heating side heat exchanger (51) comprises an air-conditioning floor heating side water outlet (52) and an air-conditioning floor heating side water return outlet (53).

2. The air source heat pump unit with three-temperature function according to claim 1, characterized in that: The air conditioning fan disk temperature control system (4) is as follows: the air outlet end of the air conditioning side compressor (1) is connected to the heat recovery heat exchanger (2), the first outlet of the heat recovery heat exchanger (2) is connected to the air conditioning side four-way valve (6), and the C port of the air conditioning side four-way valve (6) is connected in sequence to the air conditioning fan disk side heat exchanger (41), the economizer (7), the air conditioning side fin heat exchanger (8), the E port of the air conditioning side four-way valve (6), and the air intake end of the air conditioning side compressor (1).

3. The air source heat pump unit with three-temperature function according to claim 2, characterized in that: The air conditioning fan disk temperature control system (4) also includes an air conditioning fan disk side refrigeration expansion valve (44), a first non-return valve (45), a liquid spray enthalpy increase expansion valve (46), an air conditioning heating expansion valve (47) and a second non-return valve (48). The air conditioning fan disk side refrigeration expansion valve (44) is connected in parallel with the first non-return valve (45) and is arranged between the air conditioning fan disk side heat exchanger (41) and the economizer (7). The first non-return valve (45) is connected from the air conditioning fan disk side heat exchanger (41) to the economizer (7). The liquid spray enthalpy increase expansion valve (46) is connected to a first outlet of the economizer (7). The air conditioning heating expansion valve (47) is connected in parallel with the second non-return valve (48) and is arranged between the air conditioning side fin heat exchanger (8) and the liquid spray enthalpy increase expansion valve (46).

4. The air source heat pump unit with three-temperature function according to claim 4, characterized in that: The air conditioning floor heating temperature control system (5) is as follows: the air outlet end of the air conditioning side compressor (1) is connected to the heat recovery heat exchanger (2), the first outlet of the heat recovery heat exchanger (2) is connected to the air conditioning side four-way valve (6), and the C port of the air conditioning side four-way valve (6) is connected in sequence to the air conditioning floor heating side heat exchanger (51), the economizer (7), the air conditioning side fin heat exchanger (8), the air conditioning side four-way valve (6) E port, and the air conditioning side compressor (1) suction end.

5. The air source heat pump unit with three-temperature function according to claim 4, characterized in that: The air-conditioning floor heating temperature control system (5) further comprises a third one-way valve (54), a fourth one-way valve (55), a fifth one-way valve (56) and an air-conditioning floor heating side expansion valve (57); the third one-way valve (54) and the fourth one-way valve (55) are connected in parallel, and the two have opposite directions; the third one-way valve (54) and the fourth one-way valve (55) are arranged between the air-conditioning side four-way valve (6) and the air-conditioning floor heating side heat exchanger (51); the fifth one-way valve (56) and the air-conditioning floor heating side expansion valve (57) are connected in parallel, and are arranged between the air-conditioning floor heating side heat exchanger (51) and the economizer (7); the fifth one-way valve (56) is conducted from the air-conditioning floor heating side heat exchanger (51) to the economizer (7) side.

6. An air source heat pump unit with three-temperature function according to any one of claims 2 to 5, characterized in that: It also includes a heat exchange fan (9), which corresponds to the air-conditioning side fin heat exchanger (8).

7. The air source heat pump unit with three-temperature function according to claim 6, characterized in that: The domestic hot water temperature regulation system (3) comprises: the air outlet end of the air conditioning side compressor (1) is connected to the heat recovery heat exchanger (2), and the second outlet of the heat recovery heat exchanger (2) is connected to the domestic hot water side heat exchanger (31).

8. The air source heat pump unit with three-temperature function according to claim 7, characterized in that: The domestic hot water temperature regulation system (3) further comprises a temperature supplement module (34), the temperature supplement module (34) comprising a domestic hot water side compressor (35), a domestic hot water side four-way valve (36), a domestic hot water side fin heat exchanger (37) and a domestic hot water side expansion valve (38), the domestic hot water side compressor (35) being connected to the domestic hot water side four-way valve (36), and the domestic hot water side four-way valve (36) port C being connected in sequence to the domestic hot water side heat exchanger (31), the domestic hot water side expansion valve (38), the domestic hot water side fin heat exchanger (37), the domestic hot water side four-way valve (36) port E and the suction end of the domestic hot water side compressor (35).

9. The air source heat pump unit with three-temperature function according to claim 8, characterized in that: It also includes a domestic hot water side gas-liquid separator (10) and an air conditioning side gas-liquid separator (20), wherein the air conditioning side gas-liquid separator (20) is provided between the air conditioning side four-way valve (6) and the air suction end of the air conditioning side compressor (1), and the domestic hot water side gas-liquid separator (10) is provided between the domestic hot water side four-way valve (36) and the air suction end of the domestic hot water side compressor (35).

10. The air source heat pump unit with three-temperature function according to claim 9, characterized in that: It also includes a filter (30), wherein there are a plurality of filters (30), and each corresponding expansion valve is connected to a filter (30).

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