Efficient energy-saving heat pump system

Abstract

The utility model relates to the technical field of heat pumps, in particular to a high-efficiency energy-saving heat pump system, which comprises a main system and a heat pump system, the four-way valve is provided with a first control port, a second control port, a third control port and a fourth control port, the first control port is communicated with an outlet of the compressor, and the fourth control port is communicated with an inlet of the compressor; the condenser is communicated with the second control port; the evaporator communicates with the condenser and the third control port; the auxiliary system comprises a mixed flow valve, a first inlet of the mixed flow valve is communicated with an inlet of the compressor, and a second inlet of the mixed flow valve is communicated with an outlet of the compressor; and the electric control valve communicates with an outlet of the mixed flow valve and an air supplementing opening of the compressor, and the opening degree of the mixed flow valve and the opening degree of the electric control valve can be adjusted. According to the utility model, condensate water can be collected, so that the normal operation of the system can be ensured, and the high heat exchange efficiency of the system can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of heat pumps, in particular to an energy-efficient heat pump system. Background Art

[0002] Common heat pump devices compress the refrigerant from a low-temperature and low-pressure gas state to a high-temperature and high-pressure gas state through the work of a compressor. The high-temperature and high-pressure gaseous refrigerant flows into the condenser through a pipeline, and the heat is released to the outside through the condenser to turn the refrigerant into a high-temperature and high-pressure liquid state. The high-temperature and high-pressure liquid refrigerant flows through a throttling device to become a low-temperature and low-pressure liquid state, and the low-temperature and low-pressure liquid refrigerant flows into the evaporator. The refrigerant absorbs the external heat source through the evaporator to become a low-temperature and low-pressure gas state and returns to the compressor in a closed single-cycle process. Among them, the condenser and the evaporator exchange heat with the external heat source (air, water, ground, light) through the ways of heat radiation and heat conduction, so that the device can achieve the refrigeration and heating effects.

[0003] During the refrigeration and heating processes in special environments, temperature faults are likely to occur, resulting in relatively high motor temperature and compression ratio of the compressor, the system cannot operate normally, and the heat exchange efficiency is relatively low.

[0004] Therefore, an energy-efficient heat pump system is needed to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an energy-efficient heat pump system, which can ensure the normal operation of the system and can ensure that the system has a high heat exchange efficiency.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] The energy-efficient heat pump system includes:

[0008] The main system includes:

[0009] A compressor;

[0010] A four-way valve, the four-way valve has a first control port, a second control port, a third control port and a fourth control port, the first control port is communicated with the outlet of the compressor, and the fourth control port is communicated with the inlet of the compressor;

[0011] A condenser, the condenser is communicated with the second control port;

[0012] An evaporator, the evaporator is respectively communicated with the condenser and the third control port;

[0013] The four-way valve is configured such that when the first control port communicates with the second control port, the third control port communicates with the fourth control port, and when the first control port communicates with the third control port, the second control port communicates with the fourth control port;

[0014] An auxiliary system, comprising:

[0015] A mixing valve, wherein a first inlet of the mixing valve communicates with an inlet of the compressor, and a second inlet of the mixing valve communicates with an outlet of the compressor;

[0016] An electrically controlled valve, which is respectively connected to an outlet of the mixing valve and a gas replenishing port of the compressor, and the opening degrees of the mixing valve and the electrically controlled valve can be adjusted.

[0017] In some embodiments, a gas-liquid separator is provided at the fourth control port.

[0018] In some embodiments, a first filter, a throttle valve, and a second filter are successively connected in series on the pipeline between the evaporator and the condenser.

[0019] In some embodiments, a first temperature sensor is provided at the inlet of the compressor, a second temperature sensor is provided at the outlet of the compressor, and a third temperature sensor is provided on the mixing valve.

[0020] In some embodiments, a check valve is provided on the pipeline between the first inlet of the mixing valve and the inlet of the compressor. The air inlet of the check valve communicates with the inlet of the compressor, and the air outlet of the check valve communicates with the first inlet of the mixing valve.

[0021] In some embodiments, a water collecting tray is further included. The water collecting tray is located below the main system, a drain pipeline is provided on the water collecting tray, and a drain valve is provided on the drain pipeline.

[0022] In some embodiments, a spray heat exchange system is further included. The spray heat exchange system includes a first water pump and a spray integrator that are connected to each other. The first water pump is connected to the water collecting tray, and the spray integrator is used to spray water onto the evaporator.

[0023] In some embodiments, a water replenishing system is further included. The water replenishing system includes a second water pump and a water replenishing valve that are connected to each other. The water replenishing valve is connected to the water collecting tray.

[0024] In some embodiments, an electric heater is provided in the water collecting tray.

[0025] In some embodiments, an air circulation system is further included. The air circulation system includes at least one fan, and the fan is located on one side of the evaporator.

[0026] Advantages of the utility model:

[0027] For an efficient and energy-saving heat pump system provided by the utility model, the four-way valve has a first control port, a second control port, a third control port, and a fourth control port. The inlet of the compressor is connected to the fourth control port, the outlet of the compressor is connected to the first control port, the condenser is connected to the second control port, and the evaporator is respectively connected to the condenser and the third control port. The first inlet and the second inlet of the mixing valve of the auxiliary system are respectively connected to the inlet and the outlet of the compressor. When the first control port of the four-way valve is connected to the second control port and the third control port is connected to the fourth control port, it is in the heating mode. When the first control port of the four-way valve is connected to the third control port and the second control port is connected to the fourth control port, it is in the cooling mode. When an exhaust and suction temperature fault occurs in the heat pump system, the opening degrees of the mixing valve and the electronic control valve can be adjusted so that the low-temperature and low-pressure gaseous refrigerant and the high-temperature and high-pressure gaseous refrigerant enter the compressor after being mixed through the mixing valve, reducing the compression ratio and simultaneously reducing the motor temperature of the compressor to protect the normal operation of the system. Moreover, the exhaust and suction pressure ratio during the startup operation of the heat pump system can be adjusted to make the compressor start up smoothly and ensure that the system has a high heat exchange efficiency. Description of the drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the content of the embodiments of the present utility model and these drawings.

[0029] Figure 1 is a schematic diagram of an efficient and energy-saving heat pump system of the present utility model;

[0030] Figure 2 is a schematic diagram of an efficient and energy-saving heat pump system of the present utility model in the heating state;

[0031] Figure 3 is a schematic diagram of an efficient and energy-saving heat pump system of the present utility model in the cooling state.

[0032] In the figure:

[0033] 1. Main system; 11. Compressor; 111. First temperature sensor; 112. Second temperature sensor; 12. Four-way valve; 13. Condenser; 131. Inlet water temperature sensor; 132. Outlet water temperature sensor; 14. Evaporator; 141. Coil temperature sensor; 15. First filter; 16. Throttle valve; 17. Second filter; 18. Gas-liquid separator; 19. Needle valve; 2. Auxiliary system; 21. Mixing valve; 211. Third temperature sensor; 22. Electric control valve; 23. Check valve; 3. Water collection tray; 31. Electric heater; 32. Drain valve; 33. Overflow pipe; 34. Water temperature sensor; 4. Spray heat exchange system; 41. First water pump; 42. Spray integrator; 5. Water replenishment system; 51. Water replenishment valve; 6. Air circulation system; 61. Fan; D. First control port; C. Second control port; E. Third control port; S. Fourth control port. Detailed implementation manners

[0034] Before explaining any implementation manner of the present application in detail, it should be understood that the present application is not limited to the structural details and component arrangements described in the following description or shown in the above drawings.

[0035] In the present application, the terms "include", "comprise", "have" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element.

[0036] In the present application, the terms "connect", "combine", "couple", "mount" may be direct connection, combination, coupling or mounting, or may be indirect connection, combination, coupling or mounting. Among them, by way of example, direct connection means that two parts or components are connected together without the need to provide an intermediate member, and indirect connection means that two parts or components are respectively connected to at least one intermediate member, and these two parts or components are connected through the intermediate member. In addition, "connect" and "couple" are not limited to physical or mechanical connection or coupling, and may include electrical connection or coupling.

[0037] In the present application, those of ordinary skill in the art will understand that the functions performed by components may be performed by one component, multiple components, one part, or multiple parts. Similarly, the functions performed by parts may also be performed by one part, one component, or a combination of multiple parts.

[0038] In this application, the directional terms such as "upper", "lower", "left", "right", "front", and "back" are described based on the orientation and positional relationship shown in the drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that one component is connected "above" or "below" another component, it can not only be directly connected "above" or "below" another component, but also be indirectly connected "above" or "below" another component through an intermediate component. It should also be understood that the directional terms such as the upper side, the lower side, the left side, the right side, the front side, and the back side not only represent the positive direction, but can also be understood as the side direction. For example, the lower side can include directly below, lower left, lower right, lower front, and lower back, etc.

[0039] During the operation of the heat pump system, in order to ensure the normal operation of the system and ensure that the system has a high heat exchange efficiency, as Figures 1 - 3 shown, the present utility model provides an energy-efficient heat pump system. The energy-efficient heat pump system includes a main system 1 and an auxiliary system 2. The main system 1 includes a compressor 11, a four-way valve 12, a condenser 13, and an evaporator 14. The four-way valve 12 has a first control port D, a second control port C, a third control port E, and a fourth control port S. The first control port D is communicated with the outlet of the compressor 11, and the fourth control port S is communicated with the inlet of the compressor 11; the condenser 13 is communicated with the second control port C; the evaporator 14 is respectively communicated with the condenser 13 and the third control port E; the four-way valve 12 is configured such that when the first control port D is communicated with the second control port C, the third control port E is communicated with the fourth control port S, and when the first control port D is communicated with the third control port E, the second control port C is communicated with the fourth control port S. The auxiliary system 2 includes a mixing valve 21 and an electric control valve 22. Among them, the first inlet of the mixing valve 21 is communicated with the inlet of the compressor 11, and the second inlet of the mixing valve 21 is communicated with the outlet of the compressor 11; the electric control valve 22 is respectively communicated with the outlet of the mixing valve 21 and the gas supplement port of the compressor 11, and the opening degrees of the mixing valve 21 and the electric control valve 22 can be adjusted.

[0040] When the first control port D of the four-way valve 12 is communicated with the second control port C and the third control port E is communicated with the fourth control port S, it is in the heating condition. When the first control port D of the four-way valve 12 is communicated with the third control port E and the second control port C is communicated with the fourth control port S, it is in the cooling condition. When a fault occurs in the exhaust and suction gas temperatures of the heat pump system, the opening degrees of the mixing valve 21 and the electric control valve 22 can be adjusted so that the low-temperature and low-pressure gaseous refrigerant and the high-temperature and high-pressure gaseous refrigerant are mixed through the mixing valve 21 and then enter the compressor 11, reducing the compression ratio and simultaneously reducing the motor temperature of the compressor 11 to protect the normal operation of the system. Moreover, the exhaust and suction gas pressure ratio during the start-up operation of the heat pump system can also be adjusted to make the start-up operation of the compressor 11 smooth and ensure that the system has a high heat exchange efficiency.

[0041] In some embodiments, a gas-liquid separator 18 is provided at the fourth control port S. By providing the gas-liquid separator 18, the gaseous refrigerant and the liquid refrigerant can be separated, so as to ensure that the refrigerant entering the inlet of the compressor 11 is a low-temperature and low-pressure gaseous refrigerant, and ensure the stable operation of the compressor 11.

[0042] In some embodiments, a needle valve 19 is provided between the fourth control port S and the gas-liquid separator 18, and the refrigerant can be charged into the heat pump system through the needle valve 19.

[0043] In some embodiments, a first filter 15, a throttle valve 16 and a second filter 17 are sequentially connected in series on the pipeline between the evaporator 14 and the condenser 13. By providing two filters, the refrigerant can be filtered at the secondary level when the heat pump system is in the heating mode or the cooling mode, so as to ensure the cleanliness of the refrigerant entering the compressor 11. By providing the throttle valve 16, the flow rate of the refrigerant can be controlled.

[0044] In some embodiments, a first temperature sensor 111 is provided at the inlet of the compressor 11, a second temperature sensor 112 is provided at the outlet of the compressor 11, and a third temperature sensor 211 is provided on the mixing valve 21. Specifically, for the convenience of control, the first temperature sensor 111, the second temperature sensor 112 and the third temperature sensor 211 are all electrically connected to the controller. When the auxiliary system 2 needs to be used, the controller adopts the feedback temperature signals of the first temperature sensor 111, the second temperature sensor 112 and the third temperature sensor 211, and controls the mixing valve 21 and the electronic control valve 22 to be in appropriate opening degrees. After the low-temperature and low-pressure gaseous refrigerant and the high-temperature and high-pressure gaseous refrigerant are mixed through the mixing valve 21, they enter the compressor 11 through the electronic control valve 22, thereby improving the operating efficiency of the heat pump system. In this embodiment, the mixing valve 21 is an electro-proportional mixing valve, which is convenient for the controller to control the opening degree of the mixing valve 21. The controller can adopt a single-chip microcomputer or a PLC, and no more restrictions are made here. Controlling by using the controller is a conventional technical means in the prior art, and its working principle will not be described in detail here.

[0045] In some embodiments, a check valve 23 is provided on the pipeline between the first inlet of the mixing valve 21 and the inlet of the compressor 11. The air inlet of the check valve 23 is communicated with the inlet of the compressor 11, and the air outlet of the check valve 23 is communicated with the first inlet of the mixing valve 21. By providing the check valve 23, the low-temperature and low-pressure gaseous refrigerant can flow into the mixing valve 21 unidirectionally, avoiding the phenomenon of refrigerant backflow, and ensuring the normal operation of the mixing valve 21.

[0046] In some embodiments, the high-efficiency and energy-saving heat pump system further includes a water collecting tray 3, which is located below the main system 1. A drain pipe is provided on the water collecting tray 3, and a drain valve 32 is provided on the drain pipe. By providing the water collecting tray 3, the condensed water generated during the operation of the heat pump system can be collected. By providing the drain pipe, the water accumulated in the water collecting tray 3 can be discharged to prevent the water from freezing in the water collecting tray 3. To further ensure the effective discharge of the accumulated water in the water collecting tray 3, an overflow pipe 33 is provided in the water collecting tray 3, and the overflow pipe 33 corresponds to the upper limit position of the accumulated water in the water collecting tray 3. When the accumulated water reaches the upper limit position, if the drain valve 32 is not opened, the accumulated water can flow out through the overflow pipe 33.

[0047] In some embodiments, the high-efficiency and energy-saving heat pump system further includes a spray heat exchange system 4. The spray heat exchange system 4 includes a first water pump 41 and a spray integrator 42 that are interconnected. The first water pump 41 is connected to the water collecting tray 3, and the spray integrator 42 is used to spray water onto the evaporator 14. Specifically, the spray integrator 42 is installed on the top of the evaporator 14, and the baffle is installed adjacent to the air outlet surface of the evaporator 14. The evaporator 14 must be placed above the highest water surface of the water collecting tray 3 and directly above the water collecting tray 3 to ensure that the water sprayed by the spray integrator 42 onto the evaporator 14 completely drips into the water collecting tray 3. By providing the spray heat exchange system 4, water can be sprayed onto the evaporator 14, thereby quickly cooling or quickly heating the evaporator 14 as needed, enabling the heat pump system to operate efficiently.

[0048] In some embodiments, the high-efficiency and energy-saving heat pump system further includes a water replenishing system 5. The water replenishing system 5 includes a second water pump and a water replenishing valve 51 that are interconnected. The water replenishing valve 51 is connected to the water collecting tray 3. In this embodiment, the water replenishing valve 51 is a float valve, and the installation height of the water replenishing valve 51 shall not exceed the overflow opening of the overflow pipe. The water inlet end of the water replenishing valve 51 is connected to an external water source through the second water pump, and can replenish water when the spray heat exchange system 4 sprays water onto the evaporator 14 to ensure the normal operation of the spray heat exchange system 4.

[0049] In some embodiments, an electric heater 31 is provided in the water collecting tray 3. The electric heater 31 is installed at the outer bottom of the water collecting tray 3 to heat and defrost the bottom of the water collecting tray 3.

[0050] In some embodiments, the high-efficiency and energy-saving heat pump system further includes an air circulation system 6. The air circulation system 6 includes at least one fan 61, and the fan 61 is located on one side of the evaporator 14. By providing the fan 61, the air flow can be accelerated, so that the air flow is driven by the fan 61 to contact the surface of the evaporator 14, realizing energy conduction or radiation and heat exchange with the evaporator 14.

[0051] The working process of this high-efficiency and energy-saving heat pump system is as follows:

[0052] Startup condition

[0053] After receiving the startup signal, the controller is responsible for detecting the operating condition parameters of the inlet water temperature sensor 131 and the outlet water temperature sensor 132 of the condenser 13 and the coil temperature sensor 141 of the evaporator 14, and determining whether the preset startup conditions are met. If the conditions are met, the controller will send a startup command to all sub-control modules, first turn on the fan 61 to start the evaporation or condensation of the refrigerant in the evaporator 14, then turn on the throttle valve 16 to make the pressure in the whole system reach the preset value, and finally turn on the compressor 11 to start compressing the refrigerant, so that the refrigerant becomes a high-temperature and high-pressure gas and flows to the four-way valve 12.

[0054] Heating condition

[0055] When the four-way valve 12 is de-energized, the first control port D of the four-way valve 12 communicates with the second control port C, and the third control port E communicates with the fourth control port S. The refrigerant flows into the condenser 13 for condensation, and the heat is released and transferred through the condenser 13 to be absorbed by the external medium (to achieve the heating state). After flowing into the condenser 13, the refrigerant condenses into a high-temperature and high-pressure liquid and flows out. After the refrigerant flows into the throttle valve 16 and becomes a low-temperature and low-pressure liquid, it flows into the evaporator 14 to evaporate and absorb the energy in the air or water to become a low-temperature and low-pressure gas. Since the low-temperature and low-pressure gas refrigerant may carry liquid at this time, to prevent the liquid from entering the compressor 11 and causing liquid hammer damage to the compressor 11, it is also necessary to perform gas-liquid separation on the low-temperature and low-pressure gas refrigerant through the gas-liquid separator 18, and finally the dry low-temperature and low-pressure gas refrigerant returns to the compressor 11.

[0056] Cooling condition

[0057] When the controller energizes the four-way valve 12, the first control port D of the four-way valve 12 communicates with the third control port E, and the second control port C communicates with the fourth control port S. The refrigerant flows into the evaporator 14 for condensation, and the heat is released and transferred through the evaporator 14 to the outside to be taken away by the air or water. After flowing into the evaporator 14, the refrigerant condenses into a high-temperature and high-pressure liquid and flows out. After the refrigerant flows into the throttle valve 16 and becomes a low-temperature and low-pressure liquid, it flows into the condenser 13 to evaporate and absorb the energy of the external medium to become a low-temperature and low-pressure gas (to achieve the cooling state).

[0058] When very high energy efficiency is required, the low-temperature and low-pressure gas refrigerant will flow through the one-way valve 23 and enter the first inlet of the mixing valve 21. At the same time, the high-temperature and high-pressure gas refrigerant will flow into the second inlet of the mixing valve 21. The controller receives the parameter setting and controls the mixing valve 21 to open, so that the refrigerants in the two states will be mixed in the mixing valve 21. The third temperature sensor 211 of the mixing valve 21 determines whether the set temperature is reached. When the set temperature is reached, a signal is sent to the controller to control the electric control valve 22 to open, and the mixed gas flows out of the mixing valve 21, and then flows into the electric control valve 22 and then into the compressor 11. When the set temperature is not reached, a signal is sent to the controller to control the opening of the first inlet of the mixing valve 21 to reach the set temperature.

[0059] High operating conditions

[0060] After receiving a higher operating condition signal, the controller detects the operating parameters of the water inlet temperature and the water outlet temperature of the condenser 13. If the parameters do not meet the set parameters, the controller detects whether the temperature of the water in the water collecting pan 3 reaches the preset temperature through the water temperature sensor 34 in the water collecting pan 3. If the temperature is too high, the drain valve 32 is opened, and water is replenished after the water level in the water collecting pan 3 is lower than the preset water level of the water replenishing valve 51, so as to neutralize the water temperature to the preset value or make the water temperature reach the preset value by turning on the electric heater 31. After the water temperature reaches the preset value, the drain valve 32 is closed first, and then the water replenishing valve 51 is automatically closed, cutting off the external water from entering the water collecting pan 3.

[0061] The controller will control the first water pump 41 to start up, and the water in the water collection tray 3 will be transported to the spray integrator 42 through the first water pump 41 and sprayed on the evaporator 14, so as to adjust the temperature and improve the heat exchange efficiency, thereby reducing the operating load of the compressor 11 and improving the operating efficiency of the whole machine. At the same time, the fan 61 can also take away the heat absorbed by the water sprayed on the evaporator 14 and the heat generated by the evaporator 14. The external water flowing through the evaporator 14 will return to the water collection tray 3 for reciprocating use, and the dirt on the outer surface of the evaporator 14 will be cleaned at the same time. If the exhaust and return air temperature faults occur during the operation of the heat pump system, the water collection tray 3 and the spray heat exchange system 4 can also be used to adjust the temperature of the outside of the evaporator 14. After the fault is eliminated, first close the drain valve 32, and then close the second water pump of the spray heat exchange system 4.

[0062] The external heat exchange energy of the heat pump system can be divided into three types, and the three types of energy can also correspond to three demand capacity energy efficiencies. The first is the ordinary capacity energy efficiency. The entire heat pump system drives the air flow through the fan 61 to contact the surface of the evaporator 14 to achieve energy conduction or radiation and exchange energy with the evaporator 14. The external energy source is air energy; the second is the high capacity energy efficiency. The entire heat pump system sprays external water on the evaporator 14 through the water collecting tray 3, the water replenishing system 5 and the spray heat exchange system 4, and then realizes energy conduction or radiation and exchanges energy with the evaporator 14 through the water flow contacting the surface of the evaporator 14. The external energy source is water source energy; the third is the ultra-high capacity energy efficiency. The entire system drives the air flow through the fan 61 and sprays water on the evaporator 14 through the water collecting tray 3, the water replenishing system 5 and the spray heat exchange system 4 to exchange energy with the evaporator 14 at the same time. The air flow and the water flow contact the surface of the evaporator 14 to achieve energy conduction or radiation, and then the energy in the water is taken away by the wind and the water is diluted and taken away by the water. The external energy source is air energy plus water source energy.

[0063] Obviously, the above-mentioned embodiments of the present invention are only examples for clearly explaining the present invention, and are not limitations on the implementation modes of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation modes here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. An efficient and energy-saving heat pump system, characterized in that, Comprising: A main system (1), comprising: A compressor (11); A four-way valve (12), the four-way valve (12) having a first control port (D), a second control port (C), a third control port (E) and a fourth control port (S), the first control port (D) being in communication with the outlet of the compressor (11), and the fourth control port (S) being in communication with the inlet of the compressor (11); A condenser (13), the condenser (13) being in communication with the second control port (C); An evaporator (14), the evaporator (14) being in communication with the condenser (13) and the third control port (E) respectively; The four-way valve (12) is configured such that when the first control port (D) is in communication with the second control port (C), the third control port (E) is in communication with the fourth control port (S), and when the first control port (D) is in communication with the third control port (E), the second control port (C) is in communication with the fourth control port (S); An auxiliary system (2), comprising: A mixing valve (21), a first inlet of the mixing valve (21) being in communication with the inlet of the compressor (11), and a second inlet of the mixing valve (21) being in communication with the outlet of the compressor (11); An electrically controlled valve (22), the electrically controlled valve (22) being in communication with the outlet of the mixing valve (21) and the gas replenishing port of the compressor (11) respectively, and the opening degrees of the mixing valve (21) and the electrically controlled valve (22) being adjustable.

2. The high-efficiency and energy-saving heat pump system according to claim 1, wherein, A gas-liquid separator (18) is provided at the fourth control port (S).

3. The high-efficiency and energy-saving heat pump system according to claim 1, characterized in that, A first filter (15), a throttle valve (16) and a second filter (17) are sequentially connected in series on the pipeline between the evaporator (14) and the condenser (13).

4. The high-efficiency and energy-saving heat pump system according to claim 1, wherein A first temperature sensor (111) is provided at the inlet of the compressor (11), a second temperature sensor (112) is provided at the outlet of the compressor (11), and a third temperature sensor (211) is provided on the mixing valve (21).

5. The high-efficiency and energy-saving heat pump system according to claim 1, wherein A check valve (23) is provided on the pipeline between the first inlet of the mixing valve (21) and the inlet of the compressor (11), an air inlet of the check valve (23) is in communication with the inlet of the compressor (11), and an air outlet of the check valve (23) is in communication with the first inlet of the mixing valve (21).

6. The high-efficiency and energy-saving heat pump system according to claim 1, wherein It further includes a water collecting tray (3), the water collecting tray (3) being located below the main system (1), a drain pipeline being provided on the water collecting tray (3), and a drain valve (32) being provided on the drain pipeline.

7. The high-efficiency and energy-saving heat pump system according to claim 6, characterized in that, It further includes a spray heat exchange system (4), the spray heat exchange system (4) including a first water pump (41) and a spray integrator (42) which are in communication with each other, the first water pump (41) being in communication with the water collecting tray (3), and the spray integrator (42) being used for spraying water onto the evaporator (14).

8. The high-efficiency and energy-saving heat pump system according to claim 6, characterized in that It further includes a water replenishing system (5), the water replenishing system (5) including a second water pump and a water replenishing valve (51) which are in communication with each other, the water replenishing valve (51) being in communication with the water collecting tray (3).

9. The high-efficiency and energy-saving heat pump system according to claim 6, characterized in that An electric heater (31) is provided in the water collecting tray (3).

10. The high-efficiency and energy-saving heat pump system according to claim 1, wherein It further includes an air circulation system (6), and the air circulation system (6) includes at least one blower (61), and the blower (61) is located on one side of the evaporator (14).

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