Air source heat pump water machine unit

Abstract

The utility model belongs to the technical field of heat pump units, and particularly discloses an air source heat pump water machine unit which comprises a compressor, an evaporator, a double-pipe heat exchanger and a four-way valve, the compressor is connected with a first connector of the four-way valve, the evaporator is connected with a second connector of the four-way valve, and the double-pipe heat exchanger is connected with a third connector of the four-way valve. A fourth connector of the four-way valve is connected with a compressor, the compressor, the evaporator and the double-pipe heat exchanger are connected with flash steam, an electromagnetic valve is arranged between the compressor and the flash steam in a connected mode, and a two-way throttling valve is arranged between the evaporator and the flash steam in a connected mode. The device can avoid the influence of flash steam heat energy waste and emission on the environment, is beneficial to energy conservation and environmental protection, and solves the problems of heat energy waste and loss and adverse influence on the environment caused by direct emission of flash steam in the industries such as chemical printing and dyeing at present.

Description

Technical Field

[0001] The utility model belongs to the technical field of heat pump units, and in particular relates to a heat pump water unit using flash steam as a heat exchange medium. Background Art

[0002] In the chemical, printing, dyeing, papermaking, power, textile, food, building materials and other industries, the treatment of steam condensate is usually collected and sent back to the boiler room. There will be a lot of heat loss in the recycling process, and the steam condensate will produce a lot of flash steam. Flash steam contains a lot of latent heat of vaporization. Directly discharging it outdoors not only wastes heat energy, but also affects the surrounding environment. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model aims to provide an air source heat pump water machine unit, which uses flash steam as a heat exchange medium and fully utilizes the large amount of latent heat of vaporization contained in the flash steam, thereby avoiding the waste of flash steam heat energy and the impact of emissions on the environment, and is beneficial to energy conservation and environmental protection.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An air source heat pump water machine unit comprises a compressor, an evaporator, a shell and tube heat exchanger and a four-way valve, wherein the compressor is connected to a first interface of the four-way valve, the evaporator is connected to a second interface of the four-way valve, the shell and tube heat exchanger is connected to a third interface of the four-way valve, the fourth interface of the four-way valve is connected to the compressor, the compressor, the evaporator and the shell and tube heat exchanger are connected to flash steam, an electromagnetic valve is connected between the compressor and the flash steam, and a two-way throttle valve is connected between the evaporator and the flash steam.

[0006] Furthermore, the fourth interface of the four-way valve is connected to a gas-liquid separator, and a drying filter is connected between the gas-liquid separator and the compressor.

[0007] Furthermore, a photovoltaic panel is connected between the second interface of the four-way valve and the flash steam, a first stop valve is connected between the photovoltaic panel and the flash steam, a second electronic expansion valve is set between the first stop valve and the flash steam, and a second stop valve and a single-phase valve are set between the photovoltaic panel and the second interface of the four-way valve.

[0008] Optionally, a photovoltaic panel is connected between the evaporator and the flash steam, a first stop valve is connected between the photovoltaic panel and the flash steam, a second electronic expansion valve is set between the first stop valve and the flash steam, a second stop valve and a single-phase valve are set between the photovoltaic panel and the evaporator, and a drying filter is connected between the fourth interface of the four-way valve and the compressor.

[0009] Furthermore, a first electronic expansion valve is connected between the flash steam and the shell-and-tube heat exchanger.

[0010] Furthermore, a balancing tank is connected between the first electronic expansion valve and the shell-and-tube heat exchanger.

[0011] Furthermore, a high-pressure switch is connected between the compressor and the first interface of the four-way valve, and a low-pressure switch is connected between the compressor and the fourth interface of the four-way valve.

[0012] The utility model has the following beneficial effects:

[0013] The utility model air source heat pump water machine unit has the characteristics of being able to fully utilize a large amount of vaporization latent heat of flash steam, avoiding the waste of flash steam heat energy and the impact of emission on the environment, and being beneficial to energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the cooling state of the first embodiment of the air source heat pump water machine unit of the utility model;

[0015] Figure 2 This is the heating state of the first embodiment of the air source heat pump water machine unit of the utility model;

[0016] Figure 3 This is the cooling state of the second embodiment of the air source heat pump water machine unit of the utility model;

[0017] Figure 4 This is the heating state of the second embodiment of the air source heat pump water machine unit of the utility model;

[0018] Figure 5 This is the cooling state of the third embodiment of the air source heat pump water machine unit of the utility model;

[0019] Figure 6 This is the heating state of the third embodiment of the air source heat pump water machine unit of the utility model.

[0020] In the figure: 1. compressor; 2. evaporator; 3. shell and tube heat exchange; 4. four-way valve; 5. flash evaporation; 6. solenoid valve; 7. first electronic expansion valve; 8. balance tank; 9. two-way throttle valve; 10. gas-liquid separator; 11. drying filter; 12. high-pressure switch; 13. low-pressure switch; 14. photovoltaic panel; 15. first stop valve; 16. second electronic expansion valve; 17. second stop valve; 18. single-phase valve. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, so as to more clearly understand the technical concept to be protected by the present invention.

[0022] like Figure 1 and Figure 2 The first embodiment shown is an air source heat pump water machine unit, Figure 1 The flash steam medium flow direction under refrigeration state, Figure 2 In order to determine the flow direction of flash steam medium in the heating state, the air source heat pump water machine unit includes a compressor 1, an evaporator 2, a shell and tube heat exchanger 3, a four-way valve 4 and flash steam 5. The compressor 1 is connected to the first interface of the four-way valve 4, the evaporator 2 is connected to the second interface of the four-way valve 4 and the flash steam 5, the shell and tube heat exchanger 3 is connected to the third interface of the four-way valve 4 and the flash steam 5, the fourth interface of the four-way valve 4 is connected to the gas-liquid separator 10, and a drying filter 11 is connected between the gas-liquid separator 10 and the compressor 1. The shell and tube heat exchanger 3 is connected to the water tank for heat exchange with the water in the water tank. The compressor 1 draws the flash steam 5 and sends the compressed high-temperature and high-pressure flash steam 5 into the shell and tube heat exchanger 3 for heat exchange with the water in the water tank, so that the latent heat of the flash steam is fully utilized.

[0023] A high-pressure switch 12 is connected between the compressor 1 and the first interface of the four-way valve 4, an exhaust temperature sensor is provided at the exhaust end of the compressor 1, and a low-pressure switch 13 is connected between the gas-liquid separator 10 and the drying filter 11. A two-way throttle valve 9 is connected between the flash steam 5 and the evaporator 2 to limit the flow and pressure of the flash steam 5 and reduce energy consumption. A first electronic expansion valve 7 is connected between the flash steam 5 and the shell-and-tube heat exchanger 3 to adjust the flow of the flash steam 5 according to the set program. A balance tank 8 is connected between the first electronic expansion valve 7 and the shell-and-tube heat exchanger 3 to store excessive flash steam 5, prevent the flash steam 5 from flowing back, and maintain the stability of the unit system pressure. The compressor 1 is also connected to the flash steam 5, and a solenoid valve 6 is connected between the flash steam 5 and the compressor 1. The solenoid valve 6 is opened to allow the flash steam 5 to be transported into the compressor 1.

[0024] like Figure 3 and Figure 4 The air source heat pump water machine unit of the second embodiment shown in the figure is further provided with a photovoltaic panel 14 on the basis of the first embodiment, the cooling evaporator of the photovoltaic panel 14 is connected between the second interface of the four-way valve 4 and the flash steam 5, a first stop valve 15 is connected between the photovoltaic panel 14 and the flash steam 5, a second electronic expansion valve 16 is arranged between the first stop valve 15 and the flash steam 5, and a second stop valve 17 and a single-phase valve 18 are arranged between the photovoltaic panel 14 and the second interface of the four-way valve 4; the electrical output end of the photovoltaic panel 14 can be connected to the power grid through a photovoltaic inverter to supply power to the compressor 1, Figure 4In the heating state shown, the first stop valve 15 and the second stop valve 17 are opened, and the low-temperature flash steam (including condensate) after heat exchange in the shell-and-tube heat exchanger 3 absorbs the heat of the photovoltaic panel 14 when passing through the cooling evaporator of the photovoltaic panel 14, which can improve the efficiency of the photovoltaic panel 14 and improve the heat generation efficiency of the heat pump. The wet flash steam that absorbs the heat of the photovoltaic panel 14 flows to the four-way valve 4 through the single-phase valve 18, and passes through the gas-liquid separator 10 and the drying filter 11 to send the dry flash steam 5 into the compressor 1. Figure 3 In the refrigeration state shown, the first stop valve 15 is closed, and under the setting of the single-phase valve 18, the high-temperature and high-pressure flash steam 5 delivered by the compressor 1 does not pass through the photovoltaic panel 14, which can avoid the influence of the high-temperature flash steam 5 output by the compressor 1 in the refrigeration state on the photovoltaic panel 14.

[0025] like Figure 5 and Figure 6 The air source heat pump water machine unit of the third embodiment shown is provided with a photovoltaic panel 14 as in the second embodiment, but the difference is the heat exchange connection mode of the photovoltaic panel 14. The cooling evaporator of the photovoltaic panel 14 is connected between the evaporator 2 and the flash steam 5, that is, connected in parallel with the two-way throttle valve 9. A first stop valve 15 is connected between the photovoltaic panel 14 and the flash steam 5, a second electronic expansion valve 16 is provided between the first stop valve 15 and the flash steam 5, and a second stop valve 17 and a single-phase valve 18 are provided between the photovoltaic panel 14 and the evaporator 2; Figure 6 In the heating state shown, the first stop valve 15 and the second stop valve 17 are opened, and the low-temperature flash steam (containing condensate) after heat exchange in the shell-and-tube heat exchanger 3 absorbs the heat of the photovoltaic panel 14 when passing through the cooling evaporator of the photovoltaic panel 14. The wet flash steam 5 that absorbs the heat of the photovoltaic panel 14 flows to the evaporator 2 through the single-phase valve 18 and merges with the low-temperature flash steam (containing condensate) on the branch of the two-way throttle valve 9. After evaporation treatment in the evaporator 2, it flows to the four-way valve 4 and is directly dried by the drying filter 11 and then sent to the compressor 1 in a dry state. In the third embodiment, the wet flash steam that absorbs the heat of the photovoltaic panel 14 has a low content of flash condensate due to the evaporation treatment of the evaporator 2, so it can be directly dried by the drying filter 11 without setting the gas-liquid separator 10. The low-pressure switch 13 is connected and set between the drying filter 11 and the fourth interface of the four-way valve 4.

[0026] exist Figure 5 In the refrigeration state shown, the first stop valve 15 is closed, and under the setting of the single-phase valve 18, the high-temperature and high-pressure flash steam 5 delivered by the compressor 1 does not pass through the photovoltaic panel 14, which can avoid the influence of the high-temperature flash steam 5 output by the compressor 1 in the refrigeration state on the photovoltaic panel 14.

[0027] For those skilled in the art, various other corresponding changes and modifications can be made according to the technical solutions and concepts described above, and all of these changes and modifications should fall within the protection scope of the claims of the utility model.

Claims

1. An air source heat pump water machine unit, comprising a compressor (1), an evaporator (2), a shell and tube heat exchanger (3) and a four-way valve (4), wherein the compressor (1) is connected to a first interface of the four-way valve (4), the evaporator (2) is connected to a second interface of the four-way valve (4), the shell and tube heat exchanger (3) is connected to a third interface of the four-way valve (4), and the fourth interface of the four-way valve (4) is connected to the compressor (1), characterized in that: The compressor (1), the evaporator (2) and the shell-and-tube heat exchanger (3) are connected to flash steam (5); a solenoid valve (6) is provided between the compressor (1) and the flash steam (5); and a two-way throttle valve (9) is provided between the evaporator (2) and the flash steam (5).

2. The air source heat pump water machine unit according to claim 1, characterized in that: The fourth interface of the four-way valve (4) is connected to a gas-liquid separator (10), and a drying filter (11) is connected between the gas-liquid separator (10) and the compressor (1).

3. The air source heat pump water machine unit according to claim 2, characterized in that: A photovoltaic panel (14) is connected between the second interface of the four-way valve (4) and the flash steam (5), a first stop valve (15) is connected between the photovoltaic panel (14) and the flash steam (5), a second electronic expansion valve (16) is provided between the first stop valve (15) and the flash steam (5), and a second stop valve (17) and a single-phase valve (18) are provided between the photovoltaic panel (14) and the second interface of the four-way valve (4).

4. The air source heat pump water machine unit according to claim 1, characterized in that: A photovoltaic panel (14) is connected between the evaporator (2) and the flash steam (5), a first stop valve (15) is connected between the photovoltaic panel (14) and the flash steam (5), a second electronic expansion valve (16) is provided between the first stop valve (15) and the flash steam (5), a second stop valve (17) and a single-phase valve (18) are provided between the photovoltaic panel (14) and the evaporator (2), and a drying filter (11) is provided between the fourth interface of the four-way valve (4) and the compressor (1).

5. The air source heat pump water machine unit according to claim 1, 3 or 4, characterized in that: A first electronic expansion valve (7) is connected between the flash steam (5) and the shell-and-tube heat exchanger (3).

6. The air source heat pump water machine unit according to claim 5, characterized in that: A balance tank (8) is connected between the first electronic expansion valve (7) and the shell-and-tube heat exchanger (3).

7. The air source heat pump water machine unit according to claim 1, 3 or 4, characterized in that: A high-pressure switch (12) is connected between the compressor (1) and the first interface of the four-way valve (4), and a low-pressure switch (13) is connected between the compressor (1) and the fourth interface of the four-way valve (4).

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