Air source heat pump and waste heat recovery power generation system

Abstract

The utility model discloses an air source heat pump and waste heat recovery power generation system which comprises a compressor, the output end of the compressor is connected with the first end of a four-way reversing valve, the second end of the four-way reversing valve is connected with the first end of a refrigerant pipeline of a shell and tube condenser, and the third end of the four-way reversing valve is connected with an air cooling heat exchanger. The fourth end of the four-way reversing valve is connected with the input end of the compressor, and the second end of a refrigerant pipeline of the shell and tube condenser is connected with the air cooling heat exchanger through a throttling device. A pipeline for connecting the first stop valve and the fluorine pump in series is connected with the throttling device in parallel; a first end of a water pipeline of the shell-and-tube condenser is connected with one end of a water pump, and the other end of the water pump is respectively connected with a water pipeline of the process heating water tank and a heat exchange pipeline of the wastewater tank through a second three-way valve; the second end of the water pipeline of the shell and tube condenser is connected with the water pipeline of the process heating water tank and the heat exchange pipeline of the waste water tank through a first three-way valve. According to the utility model, steam energy can be saved in high-temperature seasons, and heat recovery can be realized in low-temperature seasons.

Description

Technical Field

[0001] The utility model relates to an air source heat pump and a waste heat recovery power generation system. Background Art

[0002] Air energy is a clean, environmentally friendly, low-level heat source that is inexhaustible, available everywhere, and can be obtained free of charge, making air source heat pump units widely used in winter heating and summer cooling for households and enterprises and institutions. However, the existing air source heat pump units still have the following problems that need to be solved:

[0003] The heating capacity of air source heat pumps is greatly attenuated in low temperature environments, the efficiency is low, the thermal stability is not guaranteed, and it cannot meet production requirements. Utility Model Content

[0004] The utility model aims to overcome the existing defects and provide an air source heat pump and waste heat recovery power generation system, which saves steam energy in high temperature seasons and realizes heat recovery in low temperature seasons.

[0005] The technical solution to achieve the above purpose is:

[0006] An air source heat pump and waste heat recovery power generation system, comprising a compressor, wherein the output end of the compressor is connected to the first end of a four-way reversing valve, the second end of the four-way reversing valve is connected to the first end of a refrigerant pipeline of a shell and tube condenser, the third end of the four-way reversing valve is connected to an air-cooled heat exchanger, the fourth end of the four-way reversing valve is connected to the input end of the compressor, and the second end of the refrigerant pipeline of the shell and tube condenser is connected to the air-cooled heat exchanger through a throttling device; a pipeline connected in series with a first stop valve and a fluorine pump is connected in parallel with the throttling device;

[0007] The first end of the water pipeline of the shell and tube condenser is connected to one end of the water pump, and the other end of the water pump is connected to the water pipeline of the process heating water tank and the heat exchange pipeline of the waste water tank through the second three-way valve, and the second end of the water pipeline of the shell and tube condenser is connected to the water pipeline of the process heating water tank and the heat exchange pipeline of the waste water tank through the first three-way valve, and the process heating water tank is connected to the waste water tank through the second stop valve;

[0008] The process heating water tank is equipped with a steam pipeline.

[0009] Preferably, the motor of the compressor is a permanent magnet synchronous motor having a motoring state and a generating state, and the compressor is connected to an external power supply and a power storage module.

[0010] Preferably, in the air source heat pump operation mode: the compressor is powered by an external power supply, the throttling device is in an open state, and the first stop valve and the fluorine pump are both in a closed state.

[0011] Preferably, in the air source heat pump operation mode: the compressor compresses the refrigerant, the refrigerant enters the refrigerant pipeline of the shell and tube condenser, heats the water in the water pipeline of the shell and tube condenser, the heated water releases heat through the water pipeline of the process heating water tank, and then returns to the water pipeline of the shell and tube condenser; the refrigerant in the refrigerant pipeline of the shell and tube condenser is throttled through the throttling device after releasing heat, and then enters the air-cooled heat exchanger to absorb heat from the air, and returns to the compressor.

[0012] Preferably, in the waste heat recovery power generation operation mode: the first stop valve, the second stop valve and the fluorine pump are all in an open state, the throttling device is in a closed state, and the compressor generates electricity and stores it in the power storage module.

[0013] Preferably, in the waste heat recovery power generation operation mode:

[0014] The process heating water tank is steam-heated through a steam pipeline, and its waste hot water enters the waste water tank. The water in the heat exchange pipeline of the waste water tank absorbs heat and then enters the water pipeline of the shell and tube condenser to release heat, and then returns to the heat exchange pipeline of the waste water tank; the refrigerant in the refrigerant pipeline of the shell and tube condenser absorbs heat, and the heated refrigerant is driven by the fluorine pump to enter the compressor for expansion, driving the permanent magnet synchronous motor to generate electricity; the refrigerant then releases heat and condenses through the air-cooled heat exchanger and then enters the fluorine pump.

[0015] Preferably, the wastewater tank is provided with a wastewater discharge pipe; and the process heating water tank is replenished with water through an external water source.

[0016] The beneficial effects of the utility model are as follows: in the air source heat pump operation mode, that is, at high temperature, the compressor is driven by an external power supply, the compressor compresses low-temperature and low-pressure refrigerant to form high-temperature and high-pressure refrigerant, the high-temperature and high-pressure refrigerant enters the refrigerant pipeline of the shell and tube condenser, heats the water in the water pipeline of the shell and tube condenser, the heated water releases heat through the water pipeline of the process heating water tank, and then returns to the water pipeline of the shell and tube condenser; the refrigerant in the refrigerant pipeline of the shell and tube condenser is throttled by the throttling device after releasing heat, becomes a low-temperature and low-pressure refrigerant liquid, and then enters the air-cooled heat exchanger to absorb heat from the air, and the low-temperature and low-pressure refrigerant after absorbing heat returns to the compressor;

[0017] In the waste heat power generation mode, that is, at low temperature, the process heating water tank is steam-heated through the steam pipeline, and its waste hot water enters the wastewater tank. The water in the heat exchange pipeline of the wastewater tank absorbs heat and enters the water pipeline of the shell and tube condenser to release heat, and then returns to the heat exchange pipeline of the wastewater tank; the refrigerant in the refrigerant pipeline of the shell and tube condenser absorbs heat, and the heated refrigerant is driven by the fluorine pump into the compressor for expansion, becoming a high-temperature and high-pressure refrigerant, which drives the permanent magnet synchronous motor to generate electricity; the hot high-temperature and high-pressure refrigerant then enters the air-cooled heat exchanger from the compressor; the high-temperature and high-pressure refrigerant then releases heat and condenses through the air-cooled heat exchanger and then enters the fluorine pump, and the low-temperature and low-pressure refrigerant after heat release is driven by the fluorine pump back to the shell and tube condenser, thereby realizing heat recovery. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of an air source heat pump and waste heat recovery power generation system of the utility model;

[0019] Figure 2 It is a cycle schematic diagram of the utility model in the air source heat pump operation mode;

[0020] Figure 3 It is a cycle schematic diagram of the utility model in the waste heat power generation mode.

[0021] In the figure: 1. compressor; 2. four-way reversing valve; 3. shell and tube condenser; 4. air-cooled heat exchanger; 5. throttling device; 6. first stop valve; 7. water pump; 8. fluorine pump; 9. second three-way valve; 10. process heating water tank; 11. waste water tank; 12. first three-way valve; 13. second stop valve. DETAILED DESCRIPTION

[0022] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] The utility model will be further described below in conjunction with the accompanying drawings.

[0024] like Figure 1As shown, an air source heat pump and waste heat recovery power generation system includes a compressor 1, the output end of the compressor 1 is connected to the first end of a four-way reversing valve 2, the second end of the four-way reversing valve 2 is connected to the first end of the refrigerant pipeline of a shell and tube condenser 3, the third end of the four-way reversing valve 2 is connected to an air-cooled heat exchanger 4, the fourth end of the four-way reversing valve 2 is connected to the input end of the compressor 1, and the second end of the refrigerant pipeline of the shell and tube condenser 3 is connected to the air-cooled heat exchanger 4 through a throttling device 5; the pipeline connected in series with the first stop valve 6 and the fluorine pump 8 is The throttling device 5 is connected in parallel; the first end of the water pipeline of the shell and tube condenser 3 is connected to one end of the water pump 7, and the other end of the water pump 7 is connected to the water pipeline of the process heating water tank 10 and the heat exchange pipeline of the waste water tank 11 through the second three-way valve 9, and the second end of the water pipeline of the shell and tube condenser 3 is connected to the water pipeline of the process heating water tank 10 and the heat exchange pipeline of the waste water tank 11 through the first three-way valve 12, and the process heating water tank 10 is connected to the waste water tank 11 through the second stop valve 13; the process heating water tank 10 is provided with a steam pipeline.

[0025] In the embodiment, the motor of the compressor 1 is a permanent magnet synchronous motor having a motoring state and a generating state, and the compressor 1 is connected to an external power supply and a power storage module.

[0026] In the embodiment, in the air source heat pump operation mode: the compressor 1 is powered by an external power supply, the throttling device 5 is in an open state, and the first stop valve 6 and the fluorine pump 8 are both in a closed state.

[0027] like Figure 2 As shown, the arrows in the figure indicate the flow direction of the refrigerant or water in the water pipe. The refrigerant flow is driven by the compressor 1. In the air source heat pump operation mode: the compressor 1 compresses the low-temperature and low-pressure refrigerant to form a high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant enters the refrigerant pipeline of the shell and tube condenser 3, and heats the water in the water pipeline of the shell and tube condenser 3. The heated water passes through the water pump 7, the second three-way valve 9 and the process heating water tank 10, releases heat in the water pipeline of the process heating water tank 10, and returns to the water pipeline of the shell and tube condenser 3 through the first three-way valve 12; the refrigerant in the refrigerant pipeline of the shell and tube condenser 3 is throttled through the throttling device 5 after releasing heat, and becomes a low-temperature and low-pressure refrigerant liquid, and then enters the air-cooled heat exchanger 4 to absorb heat from the air. The low-temperature and low-pressure refrigerant after absorbing heat returns to the compressor 1 through the four-way reversing valve 2.

[0028] In the embodiment, in the waste heat recovery power generation operation mode: the first stop valve 6, the second stop valve 13 and the fluorine pump 8 are all in the open state, the throttling device 5 is in the closed state, and the compressor 1 generates electricity and stores it in the power storage module.

[0029] like Figure 3 As shown, the arrows in the figure indicate the flow direction of the refrigerant or water in the water pipe. The refrigerant flow is driven by the fluorine pump 8. In the waste heat recovery power generation operation mode:

[0030] The process heating water tank 10 is steam-heated through the steam pipeline, and its waste hot water enters the waste water tank 11 through the second stop valve 13. The water in the heat exchange pipeline of the waste water tank 11 absorbs heat and enters the water pipeline of the shell and tube condenser 3 through the first three-way valve 12 to release heat, and then returns to the heat exchange pipeline of the waste water tank 11 through the water pump 7 and the second three-way valve 9; the refrigerant in the refrigerant pipeline of the shell and tube condenser 3 absorbs heat, and the heated refrigerant is driven by the fluorine pump 8 to enter the compressor 1 through the four-way reversing valve 2 to expand, and becomes a high-temperature and high-pressure refrigerant, which drives the permanent magnet synchronous motor to generate electricity; the hot high-temperature and high-pressure refrigerant then passes through the four-way reversing valve 2 from the compressor 1 to enter the air-cooled heat exchanger 4; the high-temperature and high-pressure refrigerant then enters the fluorine pump 8 after heat release and condensation through the air-cooled heat exchanger 4, and the low-temperature and low-pressure refrigerant after heat release is driven by the fluorine pump 8 through the first stop valve 6 to return to the shell and tube condenser 3, thereby realizing heat recovery.

[0031] In the embodiment, the wastewater tank 11 is provided with a wastewater discharge pipeline; the process heating water tank 10 is replenished with water through an external water source.

[0032] The above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An air source heat pump and waste heat recovery power generation system, characterized in that: The invention comprises a compressor (1), wherein the output end of the compressor (1) is connected to the first end of a four-way reversing valve (2), the second end of the four-way reversing valve (2) is connected to the first end of a refrigerant pipeline of a shell-and-tube condenser (3), the third end of the four-way reversing valve (2) is connected to an air-cooled heat exchanger (4), the fourth end of the four-way reversing valve (2) is connected to the input end of the compressor (1), and the second end of the refrigerant pipeline of the shell-and-tube condenser (3) is connected to the air-cooled heat exchanger (4) via a throttling device (5); a pipeline in which a first stop valve (6) and a fluorine pump (8) are connected in series is connected in parallel with the throttling device (5); The first end of the water pipeline of the shell and tube condenser (3) is connected to one end of the water pump (7), and the other end of the water pump (7) is respectively connected to the water pipeline of the process heating water tank (10) and the heat exchange pipeline of the waste water tank (11) through a second three-way valve (9); the second end of the water pipeline of the shell and tube condenser (3) is respectively connected to the water pipeline of the process heating water tank (10) and the heat exchange pipeline of the waste water tank (11) through a first three-way valve (12), and the process heating water tank (10) is connected to the waste water tank (11) through a second stop valve (13); The process heating water tank (10) is provided with a steam pipeline.

2. The air source heat pump and waste heat recovery power generation system according to claim 1, characterized in that: The motor of the compressor (1) is a permanent magnet synchronous motor having a motoring state and a power generation state, and the compressor (1) is connected to an external power supply and a power storage module.

3. The air source heat pump and waste heat recovery power generation system according to claim 2, characterized in that: In the air source heat pump operation mode: the compressor (1) is powered by an external power supply, the throttling device (5) is in an open state, and the first stop valve (6) and the fluorine pump (8) are both in a closed state.

4. The air source heat pump and waste heat recovery power generation system according to claim 3, characterized in that: In the air source heat pump operation mode: the compressor (1) compresses the refrigerant, the refrigerant enters the refrigerant pipeline of the shell and tube condenser (3), heats the water in the water pipeline of the shell and tube condenser (3), the heated water releases heat through the water pipeline of the process heating water tank (10), and then returns to the water pipeline of the shell and tube condenser (3); the refrigerant in the refrigerant pipeline of the shell and tube condenser (3) releases heat and is throttled by the throttling device (5), then enters the air-cooled heat exchanger (4) to absorb heat from the air, and returns to the compressor (1).

5. The air source heat pump and waste heat recovery power generation system according to claim 2, characterized in that: In the waste heat recovery power generation operation mode: the first stop valve (6), the second stop valve (13) and the fluorine pump (8) are all in an open state, the throttling device (5) is in a closed state, and the compressor (1) generates electricity and stores it in the power storage module.

6. The air source heat pump and waste heat recovery power generation system according to claim 5, characterized in that: In the waste heat recovery power generation operation mode: The process heating water tank (10) is steam-heated through a steam pipeline, and its waste hot water enters the waste water tank (11). The water in the heat exchange pipeline of the waste water tank (11) absorbs heat and then enters the water pipeline of the shell and tube condenser (3) to release heat, and then returns to the heat exchange pipeline of the waste water tank (11); the refrigerant in the refrigerant pipeline of the shell and tube condenser (3) absorbs heat, and the heated refrigerant is driven by the fluorine pump (8) to enter the compressor (1) for expansion, thereby driving the permanent magnet synchronous motor to generate electricity; the refrigerant then passes through the air-cooled heat exchanger (4) to release heat and condense, and then enters the fluorine pump (8).

7. The air source heat pump and waste heat recovery power generation system according to claim 1, characterized in that: The wastewater tank (11) is provided with a wastewater discharge pipeline; the process heating water tank (10) is replenished with water through an external water source.

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