Heat pump apparatus

Abstract

The embodiment of the utility model provides heat pump equipment which comprises a compressor, a heat exchanger, a heat exchanger, a heat exchanger and a heat exchanger, wherein the compressor is provided with an exhaust port, an air return port and an enthalpy spraying port; the target heat exchanger is provided with a condensing coil, and an inlet of the condensing coil is communicated to the exhaust port; the first-stage heat exchanger is provided with a first main flow path and a first auxiliary flow path which are used for heat exchange, and the second-stage heat exchanger is provided with a second main flow path and a second auxiliary flow path which are used for heat exchange; an outlet of the condensing coil is communicated to the air return port through a first main flow path and a second main flow path in sequence, an outlet of the second main flow path is further communicated to the enthalpy spraying port through a first auxiliary flow path, and an inlet or an outlet of the first main flow path is further communicated to the air return port through a second auxiliary flow path. According to the heat pump equipment, the flow of the refrigerant can be controlled through the first-stage heat exchanger and the second-stage heat exchanger, and therefore the low-temperature heating capacity of the heat pump equipment is greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of heat pumps, and in particular to a heat pump device. Background Art

[0002] In related technologies, with the promotion of energy conservation and environmental protection in various countries, more and more people are using heat pump equipment, including water heaters and air conditioners, etc. However, due to the low heating efficiency of heat pump equipment under low temperature conditions, it has increased the difficulty of industry promotion. In this regard, in order to meet these requirements, various manufacturers in the industry usually generally adopt the following means: First, adopt a larger capacity unit and add a heat exchanger, but this solution is costly and has low profits; second, use electric heating in ultra-low temperature environments and do not turn on the heat pump. Although the demand for low-temperature hot water is guaranteed, the power consumption is high, it is not energy-saving, and the user spends a lot; third, do not sell directly to ultra-low temperature cold areas, which will lead to the direct loss of the market in cold areas and the gradual lack of brand effect. Therefore, the heat pump equipment currently on the market is still difficult to significantly improve the level of hot water production capacity under low temperature conditions and cannot meet user needs. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a heat pump device, which aims to significantly improve the low-temperature heating capacity of the heat pump device.

[0004] In a first aspect, an embodiment of the present application provides a heat pump device, comprising:

[0005] A compressor is provided with an exhaust port, an air return port and an enthalpy spray port;

[0006] The target heat exchanger is provided with a condensing coil, the inlet of the condensing coil is connected to the exhaust port;

[0007] A primary heat exchanger and a secondary heat exchanger, wherein the primary heat exchanger is provided with a first main flow path and a first auxiliary flow path for heat exchange, and the secondary heat exchanger is provided with a second main flow path and a second auxiliary flow path for heat exchange; the outlet of the condensing coil is connected to the return air port through the first main flow path and the second main flow path in sequence, the outlet of the second main flow path is also connected to the enthalpy injection port through the first auxiliary flow path, and the inlet or outlet of the first main flow path is also connected to the return air port through the second auxiliary flow path.

[0008] According to some embodiments of the present application, the heat pump device further includes an evaporator, an inlet of the evaporator is connected to an outlet of the second main flow path, and an outlet of the evaporator is connected to the return air port.

[0009] According to some embodiments of the present application, the target heat exchanger is one or more, and the target heat exchanger is a water heat exchanger or an air heat exchanger.

[0010] According to some embodiments of the present application, the heat pump device further includes:

[0011] a main throttling assembly, arranged between the outlet of the second main flow path and the inlet of the evaporator;

[0012] a primary throttling assembly, one end of which is connected to the pipeline between the main throttling assembly and the outlet of the second main flow path, and the other end of which is connected to the inlet of the first auxiliary flow path;

[0013] A secondary throttling component has one end connected to the inlet or outlet of the first main flow path, and the other end connected to the inlet of the second auxiliary flow path.

[0014] According to some embodiments of the present application, the heat pump device further includes at least one of the following:

[0015] a first filter disposed between the outlet of the condensing coil and the inlet of the first main flow path;

[0016] a second filter disposed between the main throttling assembly and the inlet of the evaporator;

[0017] The third filter has one end connected to the pipeline between the main throttling component and the outlet of the main flow path, and the other end connected to the primary throttling component.

[0018] According to some embodiments of the present application, the heat pump device further includes at least one of the following:

[0019] a first liquid storage tank, one end of which is connected to the outlet of the evaporator and the outlet of the second auxiliary flow path, and the other end of which is connected to the return air port;

[0020] The second liquid storage tank has one end connected to the outlet of the first auxiliary flow path and the other end connected to the spray enthalpy outlet.

[0021] According to some embodiments of the present application, the heat pump device also includes a gas-liquid separator, the inlet of the gas-liquid separator is connected to the outlet of the evaporator and the outlet of the second auxiliary flow path, and the outlet of the gas-liquid separator is connected to the first liquid storage tank.

[0022] According to some embodiments of the present application, the heat pump device also includes an oil separator, a fourth filter and a capillary tube, the oil separator is provided with a first port, a second port and a third port, the first port is connected to the exhaust port, the second port is connected to the condensing coil, and the third port is connected to the return air port through the fourth filter and the capillary tube.

[0023] According to some embodiments of the present application, the heat pump device also includes a four-way valve, which is provided with a first input port, a second input port, a first output port and a second output port, the first input port is connected to the second port of the oil separator, the first output port is connected to the condensing coil, the second input port is connected to the evaporator, and the second output port is connected to the return air port.

[0024] According to some embodiments of the present application, the main throttling assembly, the primary throttling assembly and the secondary throttling assembly include electronic expansion valves, or include capillaries and solenoid valves.

[0025] According to some embodiments of the present application, both the primary heat exchanger and the secondary heat exchanger are economizers.

[0026] According to the technical solution of the embodiment of the present application, at least the following beneficial effects are achieved: the embodiment of the present application proposes a heat pump device, which includes: a compressor, which is provided with an exhaust port, a return air port and an enthalpy spray port; a target heat exchanger, which is provided with a condensing coil, the inlet of the condensing coil is connected to the exhaust port, and the condensing coil is used to heat water in the target heat exchanger; a primary heat exchanger and a secondary heat exchanger, the primary heat exchanger is provided with a first main flow path and a first auxiliary flow path for heat exchange, and the secondary heat exchanger is provided with a second main flow path and a second auxiliary flow path for heat exchange; the outlet of the condensing coil is connected to the return air port through the first main flow path and the second main flow path in turn, the outlet of the second main flow path is also connected to the enthalpy spray port through the first auxiliary flow path, and the inlet or outlet of the first main flow path is also connected to the return air port through the second auxiliary flow path. The heat pump device in the embodiment of the present application can add an additional compression stage in the heating cycle and realize intermediate air replenishment of the compressor through the two-stage enthalpy increase design of the primary heat exchanger and the secondary heat exchanger, so that the heat pump device can significantly increase the heating capacity under extreme working conditions of ultra-low temperature, greatly improve the low-temperature heating capacity of the heat pump device, and ensure the stable output of the heat pump device.

[0027] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0029] Figure 1 is a schematic structural diagram of a heat pump device provided by an embodiment of the present application;

[0030] Figure 2 is a structural schematic diagram of a heat pump device provided by another embodiment of the present application;

[0031] Figure 3 is a structural schematic diagram of a heat pump device provided by another embodiment of the present application;

[0032] Figure 4 It is a schematic diagram of the structure of a heat pump device provided in another embodiment of the present application. DETAILED DESCRIPTION

[0033] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0034] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0036] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0037] In some cases, with the promotion of energy conservation and environmental protection in various countries, more and more people are using heat pump equipment, including water heaters and air conditioners, etc. However, due to the insufficient heating capacity of heat pump equipment under low temperature conditions, it has increased the difficulty of industry promotion. In this regard, in order to meet these requirements, various manufacturers in the industry usually generally adopt the following means: First, use a larger capacity unit and add a heat exchanger, but this solution is costly and has low profits; second, use electric heating in ultra-low temperature environments and do not turn on the heat pump. Although the demand for low-temperature hot water is guaranteed, the power consumption is high, it is not energy-saving, and the user spends a lot; third, do not sell directly to ultra-low temperature cold areas, which will lead to the direct loss of the market in cold areas and the gradual lack of brand effect. Therefore, the heat pump equipment currently on the market is still difficult to significantly improve the level of hot water production capacity under low temperature conditions and cannot meet user needs.

[0038] Based on the above situation, an embodiment of the present application proposes a heat pump device, which aims to significantly improve the low-temperature heating capacity of the heat pump device.

[0039] The various embodiments of the heat pump device of the present application are further described below in conjunction with the accompanying drawings.

[0040] like Figure 1 and Figure 2 As shown, Figure 1 is a schematic diagram of the structure of a heat pump device provided by an embodiment of the present application, Figure 2 It is a schematic diagram of the structure of a heat pump device provided in another embodiment of the present application.

[0041] In one embodiment, the heat pump device of the embodiment of the present application includes but is not limited to a compressor 100, a target heat exchanger 200, a primary heat exchanger 400 and a secondary heat exchanger 500, wherein the compressor 100 is provided with an exhaust port, a return air port and an enthalpy injection port, the target heat exchanger 200 is provided with a condensing coil, the primary heat exchanger 400 is provided with a first main flow path and a first auxiliary flow path, and the secondary heat exchanger 500 is provided with a second main flow path and a second auxiliary flow path, wherein the first main flow path, the first auxiliary flow path, the second main flow path and the second auxiliary flow path are used for heat exchange.

[0042] It should be noted that the inlet of the condensing coil is connected to the exhaust port; the outlet of the condensing coil is connected to the return air port through the first main flow path and the second main flow path in turn, the outlet of the second main flow path is also connected to the spray enthalpy port through the first auxiliary flow path, and the inlet or outlet of the first main flow path is also connected to the return air port through the second auxiliary flow path.

[0043] It should be noted that the heat pump device of the embodiment of the present application also includes but is not limited to the evaporator 300, the inlet of the evaporator 300 is connected to the outlet of the second main flow path, and the outlet of the evaporator 300 is connected to the return air port.

[0044] It can be understood that the target heat exchanger 200 mentioned above may be a water heat exchanger or an air heat exchanger, and the embodiment of the present application does not specifically limit the type of the target heat exchanger 200.

[0045] It should be noted that if Figure 1 As shown, the refrigerant is divided into two paths through the exhaust port of the compressor 100, one path flows to the return air port, and the other path flows to the target heat exchanger 200, then flows to the inlet of the first main flow path through the target heat exchanger 200, and then, the refrigerant is divided into three paths through the outlet of the first main flow path, the first path flows to the evaporator 300 through the second main flow path, and flows to the return air port through the evaporator 300, the second path flows to the return air port through the second auxiliary flow path, and the third path flows to the first auxiliary flow path through the second main flow path, and flows to the injection enthalpy port through the first auxiliary flow path.

[0046] It should be noted that if Figure 2 As shown, the refrigerant is divided into two paths through the exhaust port of the compressor 100, one path flows to the return air port, and the other path flows to the target heat exchanger 200. Then, it is divided into two paths through the target heat exchanger 200, one path flows to the return air port through the second auxiliary flow path, and the other path flows to the inlet of the first main flow path. Then, the refrigerant is divided into two paths through the outlet of the first main flow path, one path flows to the evaporator 300 through the second main flow path, and flows to the return air port through the evaporator 300, and the other path flows to the first auxiliary flow path through the second main flow path, and flows to the injection enthalpy port through the first auxiliary flow path.

[0047] For example, Figure 1 As shown, the outlet of the first main flow path is connected to the return air port through the second auxiliary flow path; Figure 2 As shown, the inlet of the first main flow path is connected to the return air port through the second auxiliary flow path.

[0048] It is worth noting that the heat pump equipment of the embodiment of the present application can add an additional compression stage in the heating cycle and realize the intermediate air replenishment of the compressor 100 through the two-stage enthalpy increase design of the primary heat exchanger 400 and the secondary heat exchanger 500, so that the heat pump equipment can significantly increase the heating capacity under extreme conditions of ultra-low temperature, greatly improve the low-temperature heating capacity of the heat pump equipment, and ensure the stable output of the heat pump equipment; in addition, the embodiment of the present application does not need to adopt a large-capacity unit and increase the target heat exchanger 200 coiled tube, so as to reduce costs and increase profits, and has low noise and improves user experience; in addition, the embodiment of the present application does not need to use electric heating and turn off the heat pump in an ultra-low temperature environment, so as to reduce costs and improve safety and reliability; in addition, because the embodiment of the present application can ensure the stable output of the heat pump equipment at ultra-low temperatures, it can be sold to ultra-low temperature cold areas, and will not lead to the loss of market in cold areas and lack of brand effect.

[0049] Specifically, in one embodiment, the heat pump device also includes a main throttling component 600, a first-level throttling component 700 and a second-level throttling component 800, wherein the main throttling component 600 is arranged between the outlet of the second main flow path and the inlet of the evaporator 300, one end of the first-level throttling component 700 is connected to the pipeline between the main throttling component 600 and the outlet of the second main flow path, and the other end is connected to the inlet of the first auxiliary flow path, and one end of the second-level throttling component 800 is connected to the inlet or outlet of the first main flow path, and the other end is connected to the inlet of the second auxiliary flow path.

[0050] It should be noted that if Figure 1 As shown, after the refrigerant is compressed by the compressor 100, the high-temperature and high-pressure gaseous refrigerant is discharged through the exhaust port, and the refrigerant is divided into two paths, one path flows to the return air port, and the other path flows to the target heat exchanger 200, and performs static heat exchange with the water in the target heat exchanger 200. The refrigerant is condensed into a high-pressure two-phase state, and then the refrigerant flows to the inlet of the first main flow path, and is divided into three paths through the outlet of the first main flow path. The first path of refrigerant flows to the second main flow path, and is throttled to a low-temperature and low-pressure liquid refrigerant through the main throttling component 600, and then flows to the evaporator 300 to evaporate and absorb heat, and then flows to the return air port to enter the compression cycle of the compressor 100; the second path flows to the second auxiliary flow path after being throttled by the second throttling component, and is overheated with the refrigerant in the second main flow path, and then flows to the return air port to enter the compression cycle of the compressor 100; the third path flows to the first throttling component through the second main flow path, and enters the first auxiliary flow path after being throttled by the first throttling component, and then is overheated with the refrigerant in the first main flow path, and then flows to the injection enthalpy port to enter the compression cycle of the compressor 100.

[0051] It should be noted that if Figure 2 As shown, after the refrigerant is compressed by the compressor 100, the high-temperature and high-pressure gaseous refrigerant is discharged through the exhaust port, and the refrigerant is divided into two paths, one of which flows to the return air port, and the other flows to the target heat exchanger 200, and performs static heat exchange with the water in the target heat exchanger 200. The refrigerant is condensed into a high-pressure two-phase state, and then the refrigerant is divided into two paths, one of which flows to the second auxiliary flow path after being throttled by the second throttling component, and is superheated with the refrigerant in the second main flow path, and then flows to the return air port to enter the compression cycle of the compressor 100; the other flows to the first The inlet of the main flow path is divided into two paths through the outlet of the first main flow path. One path of refrigerant flows to the second main flow path, and is throttled to a low-temperature and low-pressure liquid refrigerant through the main throttling component 600, and then flows to the evaporator 300 to evaporate and absorb heat, and then flows to the return air port to enter the compression cycle of the compressor 100; the other path flows through the second main flow path to the first throttling component, and enters the first auxiliary flow path after throttling through the first throttling component, and then is superheated with the refrigerant in the first main flow path, and then flows to the injection enthalpy port to enter the compression cycle of the compressor 100.

[0052] For example, Figure 1As shown, the secondary throttling assembly 800 has one end connected to the outlet of the first main flow path and the other end connected to the inlet of the second auxiliary flow path; Figure 2 As shown, the secondary throttling assembly 800 has one end connected to the inlet of the first main flow path, and the other end connected to the inlet of the second auxiliary flow path;

[0053] It is worth noting that the embodiment of the present application can control the opening of the main throttling component 600, the first-level throttling component 700 and the second-level throttling component 800, thereby controlling the refrigerant flow rate flowing into the return air port of the compressor 100 through the evaporator 300 and the refrigerant flow rate of the first auxiliary flow path and the second auxiliary flow path, thereby greatly improving the low-temperature heating capacity of the heat pump equipment.

[0054] It is understandable that the main throttling assembly 600 may include an outdoor electronic expansion valve, or a capillary tube and a one-way valve. The embodiment of the present application does not specifically limit the components of the main throttling assembly 600.

[0055] It can be understood that the first-stage throttling assembly 700 may include a first-stage enthalpy spray flow path electronic expansion valve, or include a capillary tube and a solenoid valve. The embodiment of the present application does not specifically limit the components of the first-stage throttling assembly 700.

[0056] It can be understood that the secondary throttling assembly 800 may include a secondary enthalpy spray flow path electronic expansion valve, or include a capillary tube and a solenoid valve. The embodiment of the present application does not specifically limit the components of the secondary throttling assembly 800.

[0057] Specifically, in one embodiment, the heat pump device also includes a first filter 900, a second filter 1000 and a third filter 1100, wherein the first filter 900 is arranged between the outlet of the condensing coil and the inlet of the first main flow path; the second filter 1000 is arranged between the main throttling component 600 and the inlet of the evaporator 300; one end of the third filter 1100 is connected to the pipeline between the main throttling component 600 and the outlet of the main flow path, and the other end is connected to the first-stage throttling component 700.

[0058] It can be understood that the first filter 900, the second filter 1000 and the third filter 1100 work together in the heat pump device to ensure the cleanliness and normal operation of the system through multi-stage filtration.

[0059] The filter in the refrigerant circulation loop of the heat pump equipment is an important component. Its main function is to remove impurities and particles in the system to ensure smooth flow of refrigerant, thereby maintaining the normal operation and efficiency of the system. The following are several key functions of the filter in the heat pump equipment system:

[0060] Removing impurities: There may be various impurities in the system, such as metal particles, welding slag, dust, etc. These impurities may come from the manufacturing process or may be generated due to component wear during use. The filter can effectively intercept these impurities and prevent them from entering the system and causing damage to the system.

[0061] Protect components: Many components in the system, such as compressors, evaporators, and target heat exchangers, can be damaged by clogging or wear from impurities. Filters extend the service life of these components by removing these potential threats.

[0062] Maintaining efficiency: When impurities in the refrigerant circulation loop are removed by the filter, the refrigerant flows more smoothly and the heat exchange efficiency is improved. This helps to improve the overall performance of the heat pump equipment, including cooling and heating effects.

[0063] Prevent blockage: The tiny channels in the refrigerant circulation loop are easily blocked by impurities, resulting in obstruction of the refrigerant flow. The presence of the filter can prevent this from happening and ensure smooth system circulation.

[0064] System maintenance: The filter itself is also a consumable item and needs to be checked and replaced regularly. By checking the condition of the filter, the maintenance status of the system and possible problems can be evaluated.

[0065] Environmental considerations: Filters help reduce refrigerant leakage, thereby reducing the impact on the environment. Refrigerant leakage not only affects the effect of heat pump equipment, but may also cause damage to the environment.

[0066] In short, the filter in the refrigerant circulation loop of the heat pump equipment is a key component to ensure the stable operation and high efficiency of the system. Regular inspection and maintenance of the filter can effectively prevent failures and improve the reliability and efficiency of the heat pump equipment system.

[0067] Specifically, in one embodiment, the heat pump device also includes a first liquid storage tank 1200 and a second liquid storage tank 1300, one end of the first liquid storage tank is connected to the outlet of the evaporator 300 and the outlet of the second auxiliary flow path, and the other end is connected to the return air port, one end of the second liquid storage tank is connected to the outlet of the first auxiliary flow path, and the other end is connected to the spray enthalpy port.

[0068] The liquid storage tank (also called liquid storage tank or receiver) in the refrigerant circulation loop of the heat pump equipment is an important component. It has multiple functions in the heating system, such as storing refrigerant, stabilizing pressure and separating gas and liquid. The following are the main functions of the liquid storage tank in the heat pump equipment system:

[0069] Storage of refrigerant: The storage tank provides a place to store excess refrigerant. During the operation of the heating system, some refrigerant may fail to enter the evaporator or the target heat exchanger in time. The storage tank can temporarily store these refrigerants to ensure the normal operation of the system.

[0070] Stabilize pressure: The receiver helps stabilize the pressure in the system. When the heating system starts or stops, the pressure in the system may change. The receiver can absorb these pressure fluctuations and reduce the impact on the compressor and other components.

[0071] Separation of gas and liquid: The liquid storage tank can separate the refrigerant in gas and liquid state. When the refrigerant comes out of the compressor, it may be in a high-pressure hot gas state. The liquid storage tank allows the hot gas refrigerant to cool and partially liquefy in it, thereby reducing the gas content entering the target heat exchanger and improving the heat exchange efficiency.

[0072] Reduce pulsation and noise: The liquid storage tank can reduce the refrigerant pulsation in the system, thereby reducing the noise and vibration of the system. This is very important for improving the comfort of the heat pump equipment and reducing interference with the surrounding environment.

[0073] Filtration and drying: The receiver tank is usually equipped with filtration and drying functions to remove impurities and moisture from the refrigerant. This helps prevent ice blockage and corrosion problems in the system and extend the service life of system components.

[0074] System maintenance and overhaul: The presence of the liquid storage tank makes the maintenance and overhaul of the heating system more convenient. When the refrigerant needs to be added or replaced, the liquid storage tank provides a convenient access point. At the same time, by observing the state of the refrigerant in the liquid storage tank, the working condition of the system can be judged.

[0075] In summary, the liquid storage tank plays a vital role in the refrigerant circulation loop of the heat pump equipment. It not only helps to improve the overall efficiency and stability of the system, but also helps to maintain the long-term health and reliability of the system. Regular inspection and maintenance of the liquid storage tank to ensure its good working condition is essential to maintain the performance of the heat pump equipment system.

[0076] like Figure 3 and Figure 4 As shown, Figure 3 is a structural schematic diagram of a heat pump device provided by another embodiment of the present application, Figure 4 It is a schematic diagram of the structure of a heat pump device provided in another embodiment of the present application.

[0077] In one embodiment, the heat pump device of the embodiment of the present application further includes a gas-liquid separator 1400, the inlet of the gas-liquid separator 1400 is connected to the outlet of the evaporator 300 and the outlet of the second auxiliary flow path, and the outlet of the gas-liquid separator 1400 is connected to the first liquid storage tank.

[0078] It can be understood that the gas-liquid separator 1400 is used to separate the gas and liquid in the refrigerant, thereby ensuring that the gas and liquid in the refrigerant flow according to the requirements of the heat pump device.

[0079] The gas-liquid separator 1400 in the refrigerant circulation loop of the heat pump equipment is a component specially designed to separate the gas and liquid components in the refrigerant. Its main function is to ensure that the refrigerant is in an appropriate liquid state before entering the compressor, thereby improving the efficiency and stability of the system. The following are several key functions of the gas-liquid separator 1400 in the heat pump equipment system:

[0080] Reduce the risk of liquid hammer: If the compressor sucks in liquid refrigerant during operation, it may cause liquid hammer, which will damage the compressor. The gas-liquid separator separates gas and liquid refrigerant to ensure that only gaseous refrigerant enters the compressor, thereby reducing the risk of liquid hammer.

[0081] Improve energy efficiency: The gas-liquid separator helps improve the energy efficiency of the system. When the refrigerant enters the compressor in a gaseous state, it is compressed more efficiently. By separating the liquid refrigerant, it can ensure that the compressor inhales the gaseous refrigerant, thereby improving the energy efficiency of the entire system.

[0082] Stable system operation: The gas-liquid separator helps maintain stable system operation by stabilizing the state of the refrigerant entering the compressor. This helps avoid pressure fluctuations and system failures caused by unstable refrigerant conditions.

[0083] Protect the compressor: Liquid refrigerant entering the compressor may cause damage to the internal parts of the compressor, such as valve plates, piston rings, etc. The gas-liquid separator protects the compressor from damage by effectively separating the liquid refrigerant.

[0084] Optimize heat exchange: The gas-liquid separator ensures that the liquid refrigerant can fully participate in the heat exchange process, improving the heat exchange efficiency of the evaporator and the target heat exchanger.

[0085] Reduced maintenance costs: By reducing the risk of liquid hammer and damage to the compressor, the gas-liquid separator helps reduce the maintenance cost and repair frequency of the heat pump equipment system.

[0086] System diagnosis: The working status of the gas-liquid separator can be used as an indicator of the health of the system. If an abnormality is found inside the gas-liquid separator, it may indicate that there are other problems in the system and further inspection and maintenance are required.

[0087] In short, the gas-liquid separator plays a vital role in the refrigerant circulation loop of the heat pump equipment. It helps to improve the efficiency, stability and reliability of the system by ensuring that the refrigerant enters the compressor in an appropriate state. Regular inspection and maintenance of the gas-liquid separator to ensure its good working condition is essential to maintain the performance of the heat pump equipment system.

[0088] In addition, in one embodiment, the heat pump device also includes an oil separator 1500, a fourth filter 1600 and a capillary tube 1700, the oil separator 1500 is provided with a first port, a second port and a third port, the first port is connected to the exhaust port, the second port is connected to the condensing coil, and the third port is connected to the return air port through the fourth filter 1600 and the capillary tube 1700.

[0089] It can be understood that the oil separator 1500 can effectively separate the lubricating oil from the refrigerant, ensuring that the lubricating oil can smoothly return to the compressor 100, thereby preventing the compressor 100 from being damaged due to lack of oil, thereby extending the service life of the compressor 100; the fourth filter 1600 can filter out impurities in the refrigerant, ensure the cleanliness of the system, and prevent impurities from damaging the system; the capillary tube 1700 is used to convert high-pressure refrigerant into low-pressure refrigerant, thereby realizing effective transfer and release of heat.

[0090] In addition, it can be understood that when the third port of the oil separator 1500 is connected to the return air port through the fourth filter 1600 and the capillary tube 1700, the oil separator 1500 ensures the normal circulation of the lubricating oil, the fourth filter 1600 keeps the system clean, and the capillary tube 1700 realizes the throttling and pressure reduction of the refrigerant and the precise control of the evaporation temperature, thereby helping to improve the overall performance and reliability of the heat pump equipment and provide users with a more comfortable and efficient heating experience.

[0091] In addition, in one embodiment, the heat pump device also includes a four-way valve 1800, which is provided with a first input port, a second input port, a first output port and a second output port. The first input port is connected to the second port of the oil separator 1500, the first output port is connected to the condensing coil, the second input port is connected to the evaporator 300, and the second output port is connected to the return air port.

[0092] It can be understood that the four-way valve 1800 can ensure the correct flow direction of the refrigerant, thereby ensuring the normal operation of the heat pump equipment.

[0093] It should be noted that the target heat exchanger 200 is also provided with a water inlet pipe and a water outlet pipe, and the main function of the water inlet pipe is to introduce an external water source into the target heat exchanger 200. Through the water inlet pipe, cold water can enter the target heat exchanger 200, thereby providing the necessary water source for the heating process. The water inlet pipe is usually connected to a water supply system, which can be a tap water pipe or other water supply pipe. By controlling the flow rate and water pressure of the water inlet pipe, the heat pump equipment can ensure that the amount of water in the target heat exchanger 200 is moderate and maintain the stability of the water in the target heat exchanger 200; the water outlet pipe can export the hot water after heating treatment from the target heat exchanger 200 for user use. Once the water in the target heat exchanger 200 is heated to the set temperature, the user can obtain hot water through the water outlet pipe.

[0094] It should be noted that both the primary heat exchanger 400 and the secondary heat exchanger 500 are economizers.

[0095] In addition, in one embodiment, there are multiple target heat exchangers 200, that is, the hot standby device of this embodiment is a multi-connected system, including multiple target heat exchangers 200 arranged in parallel. Each heat exchanger 200 can be a water heat exchanger or an air heat exchanger.

[0096] It is worth noting that the heat pump equipment in the embodiment of the present application can add an additional compression stage in the heating cycle and realize intermediate air replenishment of the compressor 100 through the two-stage enthalpy increase design of the primary heat exchanger 400 and the secondary heat exchanger 500, so that the heat pump equipment can significantly increase the heating amount under extreme working conditions of ultra-low temperature, greatly improve the low-temperature heating capacity of the heat pump equipment, and ensure the stable output of the heat pump equipment.

[0097] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions under the shared conditions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A heat pump device, characterized in that: include: A compressor is provided with an exhaust port, an air return port and an enthalpy spray port; The target heat exchanger is provided with a condensing coil, the inlet of the condensing coil is connected to the exhaust port; A primary heat exchanger and a secondary heat exchanger, wherein the primary heat exchanger is provided with a first main flow path and a first auxiliary flow path for heat exchange, and the secondary heat exchanger is provided with a second main flow path and a second auxiliary flow path for heat exchange; the outlet of the condensing coil is connected to the return air port through the first main flow path and the second main flow path in sequence, the outlet of the second main flow path is also connected to the enthalpy injection port through the first auxiliary flow path, and the inlet or outlet of the first main flow path is also connected to the return air port through the second auxiliary flow path.

2. The heat pump device according to claim 1, characterized in that: The heat pump device further includes an evaporator, an inlet of the evaporator is connected to an outlet of the second main flow path, and an outlet of the evaporator is connected to the return air port.

3. The heat pump device according to claim 1, characterized in that: The number of the target heat exchanger is one or more, and the target heat exchanger is a water heat exchanger or an air heat exchanger.

4. The heat pump device according to claim 2, characterized in that: The heat pump device also includes: a main throttling assembly, arranged between the outlet of the second main flow path and the inlet of the evaporator; a primary throttling assembly, one end of which is connected to the pipeline between the main throttling assembly and the outlet of the second main flow path, and the other end of which is connected to the inlet of the first auxiliary flow path; A secondary throttling component has one end connected to the inlet or outlet of the first main flow path, and the other end connected to the inlet of the second auxiliary flow path.

5. The heat pump device according to claim 4, characterized in that: The heat pump device further comprises at least one of the following: a first filter disposed between the outlet of the condensing coil and the inlet of the first main flow path; a second filter disposed between the main throttling assembly and the inlet of the evaporator; The third filter has one end connected to the pipeline between the main throttling component and the outlet of the main flow path, and the other end connected to the primary throttling component.

6. The heat pump device according to claim 2, characterized in that: The heat pump device further comprises at least one of the following: a first liquid storage tank, one end of which is connected to the outlet of the evaporator and the outlet of the second auxiliary flow path, and the other end of which is connected to the return air port; The second liquid storage tank has one end connected to the outlet of the first auxiliary flow path and the other end connected to the spray enthalpy outlet.

7. The heat pump device according to claim 6, characterized in that: The heat pump device further includes a gas-liquid separator, an inlet of the gas-liquid separator is connected to an outlet of the evaporator and an outlet of the second auxiliary flow path, and an outlet of the gas-liquid separator is connected to the first liquid storage tank.

8. The heat pump device according to claim 2, characterized in that: The heat pump device also includes an oil separator, a fourth filter and a capillary tube, the oil separator is provided with a first port, a second port and a third port, the first port is connected to the exhaust port, the second port is connected to the condensing coil, and the third port is connected to the return air port through the fourth filter and the capillary tube.

9. The heat pump device according to claim 8, characterized in that: The heat pump device also includes a four-way valve, which is provided with a first input port, a second input port, a first output port, and a second output port. The first input port is connected to the second port of the oil separator, the first output port is connected to the condensing coil, the second input port is connected to the evaporator, and the second output port is connected to the return air port.

10. The heat pump device according to claim 4 or 5, characterized in that: The main throttling component, the primary throttling component and the secondary throttling component include electronic expansion valves, or capillaries and solenoid valves.

11. The heat pump device according to any one of claims 1 to 9, characterized in that: The primary heat exchanger and the secondary heat exchanger are both economizers.

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