Air conditioner

Abstract

The air conditioner comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger and a combined heat exchanger, the compressor is provided with an exhaust port, an air return port and an enthalpy spraying port, and the combined heat exchanger is provided with a main flow path, a first-stage enthalpy spraying flow path and a second-stage enthalpy spraying flow path; an inlet of the main flow path communicates with the exhaust port through the indoor heat exchanger, and an outlet of the main flow path communicates with the air return port through the outdoor heat exchanger. The inlet of one of the first-stage enthalpy spraying flow path and the second-stage enthalpy spraying flow path is communicated to the outlet of the main flow path, and the inlet of the other flow path is communicated to the inlet or the outlet of the main flow path; an outlet of the first-stage enthalpy spraying flow path communicates with the enthalpy spraying opening, and an outlet of the second-stage enthalpy spraying flow path communicates with the air return opening. According to the air conditioner, the flow of the refrigerant can be controlled through the first-stage enthalpy spraying flow path and the second-stage enthalpy spraying flow path, and therefore the low-temperature heating capacity of the air conditioner can be greatly improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and in particular to an air conditioner. Background Art

[0002] In the relevant technology, the heating effect of air conditioners in winter is often not ideal. Therefore, air conditioners on the market usually adopt the following means to improve the heating effect: First, use a larger capacity unit, but this measure is costly, has little profit, and is prone to noise complaints from users; second, add high-power electric auxiliary heating at the indoor unit as heating compensation, but this solution increases safety and reliability risks, and the energy efficiency of the heat pump is reduced, which greatly increases the heating cost of users; third, the jet augmentation system is designed to improve the low-temperature heating capacity, but this solution is technically universal and it is difficult to further improve the low-temperature heating capacity of the air conditioner. Therefore, it is still difficult for air conditioners on the market to significantly improve the heating capacity level and truly bring warmth to users. 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 an air conditioner, which aims to significantly improve the low-temperature heating capacity of the air conditioner.

[0004] In a first aspect, an embodiment of the present application provides an air conditioner, comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger and a combined heat exchanger, wherein the compressor is provided with an exhaust port, a return air port and an enthalpy spray port, and the combined heat exchanger is provided with a main flow path, a primary enthalpy spray flow path and a secondary enthalpy spray flow path;

[0005] Among them, the inlet of the main flow path is connected to the exhaust port through the indoor heat exchanger, and the outlet of the main flow path is connected to the return air port through the outdoor heat exchanger; the inlet of one of the first-level enthalpy spray flow path and the second-level enthalpy spray flow path is connected to the outlet of the main flow path, and the inlet of the other flow path is connected to the inlet or outlet of the main flow path; the outlet of the first-level enthalpy spray flow path is connected to the enthalpy spray port, and the outlet of the second-level enthalpy spray flow path is connected to the return air port.

[0006] According to some embodiments of the present application, the air conditioner further includes:

[0007] A main throttling assembly is arranged between the outlet of the main flow path and the outdoor heat exchanger;

[0008] A primary throttling assembly, one end of which is connected to the pipeline between the main throttling assembly and the outlet of the main flow path, and the other end of which is connected to the inlet of the primary enthalpy spray flow path or the secondary enthalpy spray flow path;

[0009] A secondary throttling component has one end connected to the inlet or outlet of the main flow path, and the other end connected to the inlet of the primary enthalpy spray flow path or the secondary enthalpy spray flow path.

[0010] According to some embodiments of the present application, the air conditioner further includes at least one of the following:

[0011] A main filter, disposed between the main throttling assembly and the outdoor heat exchanger;

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

[0013] The second filter has one end connected to the inlet or outlet of the main flow path, and the other end connected to the secondary throttling assembly.

[0014] According to some embodiments of the present application, the air conditioner also includes an electronically controlled radiator for dissipating heat from the electronic control panel, the refrigerant inlet end of the electronically controlled radiator is connected to the outlet of the main flow path, and the refrigerant outlet end of the electronically controlled radiator is connected to the outdoor heat exchanger through the main throttling assembly.

[0015] According to some embodiments of the present application, the air conditioner further includes at least one of the following:

[0016] A first liquid storage tank, one end of which is connected to the secondary spray enthalpy flow path outlet and the outdoor heat exchanger, and the other end of which is connected to the return air port;

[0017] The second liquid storage tank has one end connected to the first-level enthalpy spray flow path outlet, and the other end connected to the enthalpy spray port.

[0018] According to some embodiments of the present application, the air conditioner further includes a gas-liquid separator, the inlet of the gas-liquid separator is connected to the secondary spray enthalpy flow path outlet and the outdoor heat exchanger, and the outlet of the gas-liquid separator is connected to the first liquid storage tank.

[0019] 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.

[0020] According to some embodiments of the present application, the combined heat exchanger is a plate heat exchanger.

[0021] According to some embodiments of the present application, the air conditioner also includes an oil separator, a third 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 indoor heat exchanger, and the third port is connected to the return air port through the third filter and the capillary tube.

[0022] According to some embodiments of the present application, the air conditioner 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 indoor heat exchanger, the second input port is connected to the outdoor heat exchanger, and the second output port is connected to the return air port.

[0023] 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 an air conditioner, including a compressor, an outdoor heat exchanger, an indoor heat exchanger and a combined heat exchanger, the compressor is provided with an exhaust port, a return air port and an enthalpy spray port, the combined heat exchanger is provided with a main flow path, a primary enthalpy spray flow path and a secondary enthalpy spray flow path; wherein the inlet of the main flow path is connected to the exhaust port through the indoor heat exchanger, and the outlet of the main flow path is connected to the return air port through the outdoor heat exchanger; the inlet of one of the primary enthalpy spray flow path and the secondary enthalpy spray flow path is connected to the outlet of the main flow path, and the inlet of the other flow path is connected to the inlet or outlet of the main flow path; the outlet of the primary enthalpy spray flow path is connected to the enthalpy spray port, and the outlet of the secondary enthalpy spray flow path is connected to the return air port. The air conditioner of the embodiment of the present application can control the flow of the refrigerant through the primary enthalpy spray flow path and the secondary enthalpy spray flow path, thereby greatly improving the low-temperature heating capacity of the air conditioner.

[0024] 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

[0025] 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.

[0026] Figure 1 is a structural schematic diagram of an air conditioner provided by an embodiment of the present application;

[0027] Figure 2 is a structural schematic diagram of an air conditioner provided by another embodiment of the present application;

[0028] Figure 3 is a structural schematic diagram of a combined heat exchanger provided in one embodiment of the present application;

[0029] Figure 4 is a structural schematic diagram of a combined heat exchanger provided in another embodiment of the present application;

[0030] Figure 5 is a structural schematic diagram of an air conditioner provided by another embodiment of the present application;

[0031] Figure 6 It is a structural schematic diagram of an air conditioner provided in another embodiment of the present application. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] In some cases, the heating effect of air conditioners in winter is often not ideal. Therefore, air conditioners on the market usually use the following means to improve the heating effect: First, use a larger capacity unit, but this measure is costly, has little profit, and is prone to noise complaints from users; second, add high-power electric auxiliary heating at the indoor unit as heating compensation, but this solution increases safety and reliability risks, and the energy efficiency of the heat pump is reduced, which greatly increases the heating cost of users; third, design a jet augmentation system to improve low-temperature heating capacity, but this solution is technically universal and it is difficult to further improve the low-temperature heating capacity of air conditioners. Therefore, it is still difficult for air conditioners on the market to significantly improve the level of heating capacity and truly bring warmth to users.

[0037] Based on the above situation, the present application proposes an air conditioner and a control method thereof, a controller and a computer-readable storage medium, aiming to significantly improve the low-temperature heating capacity of the air conditioner.

[0038] The various embodiments of the air conditioner of the present application are further described below in conjunction with the accompanying drawings.

[0039] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, Figure 1 is a structural schematic diagram of an air conditioner provided by an embodiment of the present application, Figure 2 is a structural schematic diagram of an air conditioner provided by another embodiment of the present application, Figure 3 is a structural schematic diagram of a combined heat exchanger provided in one embodiment of the present application, Figure 4 It is a structural schematic diagram of a combined heat exchanger provided in another embodiment of the present application.

[0040] In one embodiment, the air conditioner of the embodiment of the present application includes but is not limited to a compressor 100, an outdoor heat exchanger 200, an indoor heat exchanger (not shown in the figure) and a combined heat exchanger 300. The compressor 100 is provided with an exhaust port, a return air port and an enthalpy spray port, and the combined heat exchanger 300 is provided with a main flow path, a primary enthalpy spray flow path and a secondary enthalpy spray flow path.

[0041] It should be noted that the inlet of the main flow path is connected to the exhaust port through the indoor heat exchanger, and the outlet of the main flow path is connected to the return air port through the outdoor heat exchanger 200; the inlet of one of the first-level enthalpy spray flow path and the second-level enthalpy spray flow path is connected to the outlet of the main flow path, and the inlet of the other flow path is connected to the inlet or outlet of the main flow path; the outlet of the first-level enthalpy spray flow path is connected to the enthalpy spray port, and the outlet of the second-level enthalpy spray flow path is connected to the return air port.

[0042] It should be noted that if Figure 1 As shown, the refrigerant is divided into two paths through the exhaust port of the compressor, one path flows to the return air port, and the other path flows to the outdoor heat exchanger, then flows to the inlet of the main flow path through the outdoor heat exchanger, and then, the refrigerant is divided into three paths through the outlet of the main flow path, the first path flows to the outdoor heat exchanger, and flows to the return air port through the outdoor heat exchanger, the second path flows to the inlet of the first-level injection enthalpy flow path, and flows to the injection enthalpy port through the outlet of the first-level injection enthalpy flow path, and the third path flows to the inlet of the second-level injection enthalpy flow path, and flows to the return air port through the outlet of the second-level injection enthalpy flow path.

[0043] It should be noted that if Figure 2As shown, the refrigerant is divided into two paths through the exhaust port of the compressor, one path flows to the return air port, and the other path flows to the outdoor heat exchanger. Then, after passing through the outdoor heat exchanger, the refrigerant is divided into two paths, one path flows to the inlet of the secondary injection enthalpy flow path, and flows to the return air port through the outlet of the secondary injection enthalpy flow path; the other path flows to the inlet of the main flow path, and then, through the outlet of the main flow path, the refrigerant is divided into two paths, one path flows to the outdoor heat exchanger, and flows to the return air port through the outdoor heat exchanger; the other path flows to the inlet of the primary injection enthalpy flow path, and flows to the injection enthalpy port through the outlet of the primary injection enthalpy flow path; in addition, the refrigerant can also flow to the return air port through the exhaust port of the compressor.

[0044] For example, Figure 1 As shown, the inlets of the primary enthalpy spray flow path and the secondary enthalpy spray flow path are both connected to the outlet of the main flow path.

[0045] In addition, for example, Figure 2 As shown, when the structure of the combined heat exchanger 300 is as shown Figure 3 As shown, the inlet of the primary enthalpy spray flow path is connected to the outlet of the main flow path, and the inlet of the secondary enthalpy spray flow path is connected to the inlet of the main flow path, that is, the outlet of the indoor heat exchanger; when the structure of the combined heat exchanger 300 is as shown Figure 4 As shown, the inlet of the secondary enthalpy spray flow path is connected to the outlet of the main flow path, and the inlet of the primary enthalpy spray flow path is connected to the inlet of the main flow path, that is, the outlet of the indoor heat exchanger.

[0046] It is worth noting that due to the two-stage enthalpy increase design of the first-stage enthalpy injection flow path and the second-stage enthalpy injection flow path, an additional compression stage can be added to the heating cycle and the intermediate air replenishment of the compressor can be realized, so that the air conditioner can significantly increase the heating capacity under ultra-low temperature extreme working conditions, greatly improving the low-temperature heating capacity of the air conditioner and ensuring the stable output of the air conditioner; in addition, the embodiment of the present application does not need to use a large-capacity unit, thereby reducing costs and increasing profits, and has low noise and improves user experience; in addition, the embodiment of the present application does not need to use high-power electric auxiliary heating as a heating subsidy, thereby reducing costs and improving safety and reliability.

[0047] Specifically, in one embodiment, the air conditioner also includes a main throttling component 400, a first-level throttling component 500 and a second-level throttling component 600, wherein the main throttling component 400 is arranged between the outlet of the main flow path and the outdoor heat exchanger 200, one end of the first-level throttling component 500 is connected to the pipeline between the main throttling component 400 and the outlet of the main flow path, and the other end is connected to the inlet of the first-level spray enthalpy flow path or the second-level spray enthalpy flow path, one end of the second-level throttling component 600 is connected to the inlet or outlet of the main flow path, and the other end is connected to the inlet of the first-level spray enthalpy flow path or the second-level spray enthalpy flow path.

[0048] It should be noted that if Figure 1As shown, after the refrigerant is compressed by the compressor, 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 indoor heat exchanger to exchange heat with the refrigerant in the indoor heat exchanger. The refrigerant is condensed into a high-pressure two-phase state, and then the refrigerant flows to the inlet of the main flow path, and is divided into three paths through the outlet of the main flow path. The first path of refrigerant flows to the outdoor heat exchanger through the main throttling component for evaporation and heat absorption, and flows to the return air port through the outdoor heat exchanger to enter the compressor compression cycle; the second path flows to the inlet of the first-stage spray enthalpy flow path, and after absorbing heat, it flows to the first-stage throttling component through the outlet of the first-stage spray enthalpy flow path, and flows to the spray enthalpy port through the first-stage throttling component to enter the compressor compression cycle; the third path flows to the inlet of the second-stage spray enthalpy flow path, and after absorbing heat, it flows to the second-stage throttling component through the outlet of the second-stage spray enthalpy flow path, and flows to the return air port through the second-stage throttling component to enter the compressor compression cycle.

[0049] It should be noted that if Figure 2 As shown, after the refrigerant is compressed by the compressor, 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 indoor heat exchanger to exchange heat with the refrigerant in the indoor heat exchanger. The refrigerant is condensed into a high-pressure two-phase state and divided into two paths, one path flows to the inlet of the secondary spray enthalpy flow path, and after absorbing heat, it flows to the secondary throttling component through the outlet of the secondary spray enthalpy flow path, and flows to the return air port through the secondary throttling component to enter the compressor compression cycle; the other path of refrigerant flows to the inlet of the main flow path, and is divided into two paths through the outlet of the main flow path, one path of refrigerant flows to the outdoor heat exchanger through the main throttling component for evaporation and heat absorption, and flows to the return air port through the outdoor heat exchanger to enter the compressor compression cycle; the other path flows to the inlet of the first-stage spray enthalpy flow path, and after absorbing heat, it flows to the first-stage throttling component through the outlet of the first-stage spray enthalpy flow path, and flows to the spray enthalpy port through the first-stage throttling component to enter the compressor compression cycle.

[0050] For example, Figure 1 As shown, when the structure of the combined heat exchanger 300 is as shown Figure 3 As shown, one end of the primary throttling assembly 500 is connected to the pipeline between the main throttling assembly 400 and the outlet of the main flow path, and the other end is connected to the inlet of the primary enthalpy injection flow path. One end of the secondary throttling assembly 600 is connected to the outlet of the main flow path, and the other end is connected to the inlet of the secondary enthalpy injection flow path. When the structure of the combined heat exchanger 300 is as shown Figure 4 As shown, one end of the first-stage throttling assembly 500 is connected to the pipeline between the main throttling assembly 400 and the outlet of the main flow path, and the other end is connected to the inlet of the second-stage enthalpy spray flow path. One end of the second-stage throttling assembly 600 is connected to the outlet of the main flow path, and the other end is connected to the inlet of the first-stage enthalpy spray flow path.

[0051] In addition, for example, Figure 2 As shown, when the structure of the combined heat exchanger 300 is as shown Figure 3 As shown, one end of the primary throttling assembly 500 is connected to the pipeline between the main throttling assembly 400 and the outlet of the main flow path, and the other end is connected to the inlet of the primary enthalpy injection flow path. One end of the secondary throttling assembly 600 is connected to the inlet of the main flow path, and the other end is connected to the inlet of the secondary enthalpy injection flow path. When the structure of the combined heat exchanger 300 is as shown Figure 4 As shown, one end of the first-stage throttling assembly 500 is connected to the pipeline between the main throttling assembly 400 and the outlet of the main flow path, and the other end is connected to the inlet of the second-stage enthalpy spray flow path. One end of the second-stage throttling assembly 600 is connected to the inlet of the main flow path, and the other end is connected to the inlet of the first-stage enthalpy spray flow path.

[0052] It is worth noting that the embodiment of the present application can control the opening of the main throttling component 400, the first-level throttling component 500 and the second-level throttling component 600, thereby controlling the refrigerant flow rate flowing into the compressor return air port through the outdoor heat exchanger and the refrigerant flow rate of the first-level spray enthalpy flow path and the second-level spray enthalpy flow path in the combined heat exchanger 300, thereby greatly improving the low-temperature heating capacity of the air conditioner.

[0053] It can be understood that the main throttling component 400 may include an outdoor electronic expansion valve, or, include a capillary tube and a one-way valve; the first-level throttling component 500 may include a first-level enthalpy spray flow path electronic expansion valve, or, include a capillary tube and a solenoid valve; the second-level throttling component 600 may include a second-level 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 main throttling component 400, the first-level throttling component 500 and the second-level throttling component 600.

[0054] Specifically, in one embodiment, the air conditioner also includes a main filter 700, a first filter 800 and a second filter 900, wherein the main filter 700 is arranged between the main throttling component 400 and the outdoor heat exchanger 200; one end of the first filter 800 is connected to the pipeline between the main throttling component 400 and the outlet of the main flow path, and the other end is connected to the first-level throttling component 500; one end of the second filter 900 is connected to the inlet or outlet of the main flow path, and the other end is connected to the second-level throttling component 600.

[0055] For example, Figure 1 As shown, one end of the second filter 900 is connected to the outlet of the main flow path, and the other end is connected to the secondary throttling assembly 600; Figure 2 As shown, one end of the second filter 900 is connected to the inlet of the main flow path, and the other end is connected to the secondary throttling assembly 600 .

[0056] It can be understood that the main filter 700, the first filter 800 and the second filter 900 work together in the air conditioner to ensure the cleanliness and normal operation of the system through multi-stage filtering.

[0057] The filter in the air conditioner refrigerant circulation loop is an important component. Its main function is to remove impurities and particles in the system to ensure smooth refrigerant flow, thereby maintaining the normal operation and efficiency of the system. The following are several key functions of the filter in the air conditioning system:

[0058] 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.

[0059] Protect components: Many components in the system, such as compressors, evaporators and condensers, can be damaged by clogging or wear from impurities. Filters extend the service life of these components by removing these potential threats.

[0060] 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 improve the overall performance of the air conditioner, including cooling and heating effects.

[0061] 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.

[0062] 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.

[0063] Environmental considerations: Filters help reduce refrigerant leakage, thereby reducing the impact on the environment. Refrigerant leakage not only affects the air conditioning effect, but may also cause damage to the environment.

[0064] In short, the filter in the refrigerant circulation loop of the air conditioner 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 air conditioning system.

[0065] Specifically, in one embodiment, the air conditioner also includes an electronically controlled radiator 1000 for dissipating heat from the electronic control panel, the refrigerant inlet end of the electronically controlled radiator 1000 is connected to the outlet of the main flow path, and the refrigerant outlet end of the electronically controlled radiator 1000 is connected to the outdoor heat exchanger 200 through the main throttling component 400.

[0066] It can be understood that the refrigerant enters the inlet end of the electric control radiator 1000, passes through the electric control radiator 1000, and then flows from the outlet end through the main throttling component 400 to the outdoor heat exchanger 200, thereby achieving efficient heat transfer and dissipation, which helps to ensure the stable operation of the electric control board and prevent performance degradation or failure caused by overheating. In addition, the flow of the refrigerant in the electric control radiator 1000 takes away the heat dissipated by the power devices on the electric control board, ensuring the normal operation of the power devices.

[0067] Specifically, in one embodiment, the air conditioner also includes a first liquid storage tank 1100 and a second liquid storage tank 1200, one end of the first liquid storage tank 1100 is connected to the secondary enthalpy spray flow path outlet and the outdoor heat exchanger 200, and the other end is connected to the return air port, one end of the second liquid storage tank 1200 is connected to the primary enthalpy spray flow path outlet, and the other end is connected to the enthalpy spray port.

[0068] The liquid storage tank (also called a liquid storage tank or receiver) in the refrigerant circulation loop of the air conditioner 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 air conditioning 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 condenser in time. The storage tank can temporarily store this refrigerant 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] Separating 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 condenser and improving the heat exchange efficiency.

[0072] Reduce pulsation and noise: The receiver 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 air conditioner 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 fluid storage tank plays a vital role in the air conditioner refrigerant circulation loop. It not only helps improve the overall efficiency and stability of the system, but also helps maintain the long-term health and reliability of the system. Regular inspection and maintenance of the fluid storage tank to ensure its good working condition is essential to maintain the performance of the air conditioning system.

[0076] like Figure 5 and Figure 6 As shown, Figure 5 is a structural schematic diagram of an air conditioner provided by another embodiment of the present application, Figure 6 It is a structural schematic diagram of an air conditioner provided in another embodiment of the present application.

[0077] In one embodiment, the air conditioner of the embodiment of the present application also includes a gas-liquid separator 1300, the inlet of the gas-liquid separator 1300 is connected to the secondary spray enthalpy flow path outlet and the outdoor heat exchanger 200, and the outlet of the gas-liquid separator 1300 is connected to the first liquid storage tank 1100.

[0078] It can be understood that the gas-liquid separator 1300 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 air conditioner.

[0079] The gas-liquid separator in the refrigerant circulation loop of the air conditioner 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 in the air conditioning 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 condenser.

[0085] Reduced maintenance costs: By reducing the risk of liquid hammer and damage to the compressor, the accumulator helps reduce the maintenance cost and repair frequency of the air conditioning 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 air conditioner refrigerant circulation loop. It helps improve the efficiency, stability and reliability of the system by ensuring that the refrigerant enters the compressor in the proper state. Regular inspection and maintenance of the gas-liquid separator to ensure its good working condition is essential to maintain the performance of the air conditioning system.

[0088] In addition, it should be noted that the above-mentioned combined heat exchanger 300 is a plate heat exchanger.

[0089] In addition, in one embodiment, the air conditioner also includes an oil separator 1400, a third filter 1500 and a capillary tube 1600, the oil separator 1400 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 indoor heat exchanger, and the third port is connected to the return air port through the third filter 1500 and the capillary tube 1600.

[0090] It can be understood that the oil separator 1400 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 third filter 1500 can filter out impurities in the refrigerant, ensure the cleanliness of the system, and prevent impurities from damaging the system; the capillary tube 1600 is used to convert high-pressure refrigerant into low-pressure refrigerant, thereby realizing effective transfer and release of heat.

[0091] In addition, it can be understood that when the third port of the oil separator 1400 is connected to the return air port through the third filter 1500 and the capillary tube 1600, the oil separator 1400 ensures the normal circulation of the lubricating oil, the third filter 1500 keeps the system clean, and the capillary tube 1600 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 air conditioner and provide users with a more comfortable and efficient heating experience.

[0092] In addition, in one embodiment, the air conditioner also includes a four-way valve 1700, 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 1400, the first output port is connected to the indoor heat exchanger, the second input port is connected to the outdoor heat exchanger 200, and the second output port is connected to the return air port.

[0093] It can be understood that the four-way valve 1700 can ensure the correct flow direction of the refrigerant, thereby ensuring the normal operation of the air conditioner.

[0094] 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. An air conditioner, characterized in that: It includes a compressor, an outdoor heat exchanger, an indoor heat exchanger and a combined heat exchanger, wherein the compressor is provided with an exhaust port, a return air port and an enthalpy spray port, and the combined heat exchanger is provided with a main flow path, a primary enthalpy spray flow path and a secondary enthalpy spray flow path; Among them, the inlet of the main flow path is connected to the exhaust port through the indoor heat exchanger, and the outlet of the main flow path is connected to the return air port through the outdoor heat exchanger; the inlet of one of the first-level enthalpy spray flow path and the second-level enthalpy spray flow path is connected to the outlet of the main flow path, and the inlet of the other flow path is connected to the inlet or outlet of the main flow path; the outlet of the first-level enthalpy spray flow path is connected to the enthalpy spray port, and the outlet of the second-level enthalpy spray flow path is connected to the return air port.

2. The air conditioner according to claim 1, characterized in that: The air conditioner also includes: A main throttling assembly is arranged between the outlet of the main flow path and the outdoor heat exchanger; A primary throttling assembly, one end of which is connected to the pipeline between the main throttling assembly and the outlet of the main flow path, and the other end of which is connected to the inlet of the primary enthalpy spray flow path or the secondary enthalpy spray flow path; A secondary throttling component has one end connected to the inlet or outlet of the main flow path, and the other end connected to the inlet of the primary enthalpy spray flow path or the secondary enthalpy spray flow path.

3. The air conditioner according to claim 2, characterized in that: The air conditioner further comprises at least one of the following: A main filter, disposed between the main throttling assembly and the outdoor heat exchanger; A first filter, one end of which is connected to the pipeline between the main throttling assembly and the outlet of the main flow path, and the other end of which is connected to the primary throttling assembly; The second filter has one end connected to the inlet or outlet of the main flow path, and the other end connected to the secondary throttling assembly.

4. The air conditioner according to claim 2, characterized in that: The air conditioner also includes an electronically controlled radiator for dissipating heat from the electronic control panel, the refrigerant inlet end of the electronically controlled radiator is connected to the outlet of the main flow path, and the refrigerant outlet end of the electronically controlled radiator is connected to the outdoor heat exchanger through the main throttling component.

5. The air conditioner according to claim 2, characterized in that: The air conditioner further comprises at least one of the following: A first liquid storage tank, one end of which is connected to the secondary spray enthalpy flow path outlet and the outdoor heat exchanger, and the other end of which is connected to the return air port; The second liquid storage tank has one end connected to the first-level enthalpy spray flow path outlet, and the other end connected to the enthalpy spray port.

6. The air conditioner according to claim 5, characterized in that: The air conditioner further comprises a gas-liquid separator, the inlet of the gas-liquid separator is connected to the outlet of the secondary spray enthalpy flow path and the outdoor heat exchanger, and the outlet of the gas-liquid separator is connected to the first liquid storage tank.

7. The air conditioner according to any one of claims 2 to 6, 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.

8. The air conditioner according to any one of claims 1 to 6, characterized in that: The combined heat exchanger is a plate heat exchanger.

9. The air conditioner according to claim 1, characterized in that: The air conditioner also includes an oil separator, a third 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 indoor heat exchanger, and the third port is connected to the return air port through the third filter and the capillary tube.

10. The air conditioner according to claim 9, characterized in that: The air conditioner 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 indoor heat exchanger, the second input port is connected to the outdoor heat exchanger, and the second output port is connected to the return air port.

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