Air conditioner supplemental gas enthalpy increasing system, method, device and air conditioning system

Abstract

The application relates to the air conditioning technical field, and particularly discloses an air conditioner air supplementing and enthalpy increasing system, method, equipment and air conditioning system. The system is composed of a two-way valve, an electronic expansion valve, an enthalpy increasing air supplementing compressor, an indoor side of an air conditioning system, an outdoor side of the air conditioning system and a four-way valve for switching heating and dehumidifying modes to form a pipeline channel. When defrosting is needed, the first electronic expansion valve and the second electronic expansion valve are used to open to the maximum opening degree before the switching of the four-way valve, so that the switching pressure difference of the four-way valve is reduced, the rapid switching technology is realized, the defrosting time is shortened, and the defrosting effect and efficiency are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to an air conditioner air supplementing and enthalpy increasing system, method, device and air conditioning system. BACKGROUND

[0002] Under low temperature conditions, an important factor affecting the heating effect of an air conditioning unit is the need to handle frost. In the prior art, the unit has to be stopped and reversed to start defrosting, and then stopped and switched back to regular heating. This not only affects the continuous heating effect of the unit, but also greatly affects the thermal comfort of the user.

[0003] To solve the above problems, the prior art has some solutions, such as patent CN106091464A, which introduces an air supplementing and enthalpy increasing compressor system, which achieves the purpose of defrosting through bypass defrosting and conventional reversing defrosting. The disadvantage is that the bypass method mixes the two streams of refrigerant with a large pressure difference, causing a large pressure fluctuation in the entire air conditioning system. Moreover, the conventional defrosting method is still used in harsh conditions, and the on-off four-way valve reversing greatly affects the indoor heating effect. Patent CN103574758B introduces a heat storage defrosting method, which introduces a heat storage device in the flow path. When defrosting is needed, the refrigerant is heated through the heat storage flow path. The disadvantage of this unit is that the heat storage device still has enough power under normal low temperature conditions, but under lower temperature conditions, the heat storage device cannot support the temperature rise of the refrigerant to help the evaporator side melt frost. Its working condition is very limited, and the promotion area is small. Patent CN211977301U introduces an electromagnetic heating auxiliary defrosting method. When defrosting is needed, the low-temperature and low-pressure refrigerant after throttling is mixed with the heated refrigerant in the bypass secondary flow path to increase the temperature of the evaporator side and prevent the fins from frosting due to low temperature. The disadvantage of this patent is that an external heating component is introduced, which is inefficient and has poor heating effect under low temperature conditions. The electromagnetic heating effect is not controlled during the defrosting stage, and the heating effect is single, making the entire unit inefficient. SUMMARY

[0004] Therefore, the present application aims to provide an air conditioner air supplementing and enthalpy increasing system, method, device and air conditioning system to overcome the poor defrosting effect of the current air conditioning system.

[0005] To achieve the above purpose, the present application adopts the following technical solutions:

[0006] In a first aspect, the present application provides an air conditioner air supplementing and enthalpy increasing system, comprising: an enthalpy increasing and air supplementing compressor, a first electronic expansion valve, a second electronic expansion valve, a first two-way valve, a second two-way valve, a third two-way valve and a flash evaporator.

[0007] The suction end of the enthalpy-increasing air supplement compressor is connected with the first end of a four-way valve in the air conditioning system for switching heating and dehumidifying modes; the exhaust end of the enthalpy-increasing air supplement compressor is connected with the third end of the four-way valve; the air supplement end of the enthalpy-increasing air supplement compressor is connected with the first end of the first two-way valve; the second end of the first two-way valve is connected with the first end of the flash vapor;

[0008] The first end of the second two-way valve is connected with the first end of the first electronic expansion valve, and the first end of the second two-way valve is connected with the second end of the four-way valve through the indoor side of the air conditioning system; the second end of the second two-way valve is connected with the first end of the third two-way valve;

[0009] The second end of the third two-way valve is connected with the second end of the second electronic expansion valve, and the second end of the third two-way valve is connected with the fourth end of the four-way valve through the outdoor side of the air conditioning system; the first end of the second electronic expansion valve is connected with the third end of the flash vapor; the second end of the flash vapor is connected with the second end of the first electronic expansion valve;

[0010] The first end of the first electronic expansion valve is also connected with the second end of the four-way valve through the indoor side of the air conditioning system; the second end of the second electronic expansion valve is also connected with the fourth end of the four-way valve through the outdoor side of the air conditioning system;

[0011] The first electronic expansion valve and the second electronic expansion valve are used to open to the maximum opening degree before switching of the four-way valve, so as to reduce the switching pressure difference of the four-way valve.

[0012] In a second aspect, the application provides an air conditioning air supplement and enthalpy-increasing method, which is applied to the air conditioning air supplement and enthalpy-increasing system as described above, and includes the following steps:

[0013] Collecting the outside environment temperature of the air conditioning system;

[0014] Judging whether the outside environment temperature is lower than or equal to the lower limit environment temperature for suppressing frost, if yes, applying the defrosting mode; if no, collecting the air conditioning outer pipe temperature;

[0015] Judging whether the air conditioning outer pipe temperature is lower than or equal to the lower limit outer pipe temperature for suppressing frost, if yes, applying the defrosting mode; if no, applying the frost suppressing mode.

[0016] Further, in some embodiments of the application, in the frost suppressing mode:

[0017] The frequency of the enthalpy-increasing air supplement compressor is reduced to a first preset frequency, the first electronic expansion valve and the second electronic expansion valve are opened to the maximum opening degree, the first two-way valve and the second two-way valve are closed, and the third two-way valve is opened;

[0018] And in the frost suppression mode, the air conditioning system keeps a heating state.

[0019] Further, in some embodiments of the present application, the application of the defrosting mode further comprises:

[0020] When the outdoor pipe temperature of the air conditioner is detected to rise to a preset temperature, or after the defrosting mode is determined to run for a preset time length, the defrosting mode is exited.

[0021] Further, in some embodiments of the present application, the exiting of the defrosting mode comprises:

[0022] The frequency of the enthalpy-increasing air-supplying compressor is increased, and the third two-way valve is controlled to be closed, the first two-way valve is controlled to be opened, and the first electronic expansion valve and the second electronic expansion valve are adjusted to the opening degrees before entering the defrosting mode, so that the air conditioning system enters a next heating cycle.

[0023] Further, in some embodiments of the present application, in the defrosting mode:

[0024] The enthalpy-increasing air-supplying compressor is reduced to a second preset frequency, the first two-way valve is closed, the second two-way valve is opened, the third two-way valve is closed, and the first electronic expansion valve and the second electronic expansion valve are opened to the maximum opening degrees;

[0025] And after a preset time length, the four-way valve is directly switched to switch from the heating state to the cooling state.

[0026] Further, in some embodiments of the present application, the application of the defrosting mode further comprises:

[0027] When the outdoor pipe temperature of the air conditioner is detected to rise to a preset temperature, the defrosting mode is exited.

[0028] Further, in some embodiments of the present application, the exiting of the defrosting mode comprises:

[0029] The enthalpy-increasing air-supplying compressor is increased to a third preset frequency, and the first two-way valve is controlled to be opened, the second two-way valve and the third two-way valve are controlled to be closed, and the first electronic expansion valve and the second electronic expansion valve are restored to the opening degrees before entering the defrosting mode.

[0030] In a third aspect, the present application provides an air conditioning air-supplying and enthalpy-increasing device, comprising a processor and a memory, the processor being connected with the memory:

[0031] The processor is configured to call and execute a program stored in the memory.

[0032] The memory is configured to store the program, and the program is used for the air conditioning air-supplying and enthalpy-increasing method.

[0033] In a fourth aspect, the present application provides an air conditioning system, comprising an air conditioning main body and the air conditioning air supplementing and enthalpy increasing system as described above.

[0034] The present application relates to the technical field of air conditioning, in particular to an air conditioning air supplementing and enthalpy increasing system, method, device and air conditioning system, the system is connected with an enthalpy increasing air supplementing compressor, an indoor side of an air conditioning system, an outdoor side of the air conditioning system and a four-way valve for switching heating and dehumidifying modes through a pipeline formed by a two-way valve and electronic expansion valves, when defrosting is needed, the first electronic expansion valve and the second electronic expansion valve are used to open to the maximum opening degree before the reversing of the four-way valve, so as to reduce the reversing pressure difference of the four-way valve, thereby realizing fast reversing technology, shortening the defrosting time, improving the defrosting effect and efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0036] Figure 1 is a structural schematic diagram of the air conditioning air supplementing and enthalpy increasing system provided by the embodiment of the present application;

[0037] Figure 2 is a flow schematic diagram of the air conditioning air supplementing and enthalpy increasing method provided by the embodiment of the present application;

[0038] Figure 3 is a flow schematic diagram of the air conditioning air supplementing and enthalpy increasing method provided by another embodiment of the present application;

[0039] Figure 4 is an application principle diagram of the air conditioning air supplementing and enthalpy increasing method provided by the embodiment of the present application;

[0040] Figure 5 is a structural schematic diagram of the air conditioning air supplementing and enthalpy increasing device provided by the embodiment of the present application. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be described in detail below. Obviously, the described embodiments only constitute some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0042] SUMMARY

[0043] In existing technologies, optimizing the defrosting method is a crucial way to improve the heating performance of low-temperature heat pump units. However, each time defrosting is required, the unit needs to shut down the compressor, wait for the four-way valve to reverse, then restart defrosting, and then shut down again after defrosting, repeating this lengthy process. This process significantly impacts the unit's heating capacity and indoor temperature comfort. Currently, the mainstream approach suffers from several problems, including:

[0044] 1. In normal low-temperature heating conditions, the defrosting cycle is short and the frequent defrosting starts increase the risk to compressor reliability, resulting in poor heating comfort for users in the room.

[0045] 2. In extreme low-temperature heating conditions, the defrosting effect of the gas-injection and enthalpy-increasing model is slow and the defrosting time is long.

[0046] 3. Liquid hammer caused by liquid carried in during gas replenishment and defrosting in models that use gas replenishment to increase enthalpy.

[0047] 4. During regular reversing defrosting, the indoor unit is on the evaporator side, so it will frost up. After defrosting is completed, the indoor unit needs to be defrosted again, which makes the time to exit the anti-cold air protection is long.

[0048] 4. It requires the introduction of external heating or heat storage devices, resulting in low efficiency.

[0049] This application, through an air conditioning unit system based on an enthalpy-increasing gas-injection model, makes targeted improvements to and organically combines the two commonly used defrosting methods in the industry: the "hot gas defrosting" mode and the conventional reversing defrosting mode. It retains the characteristics of the "defrosting" mode (hot gas defrosting): the unit can still maintain heating and has little impact on the indoor effect. It can also maintain a high-efficiency defrosting effect under low temperature and harsh conditions. That is, there is no need to add an external heat source or redundant heat storage devices. The existing devices of the gas-injection enthalpy-increasing unit can complete a series of controls and improve the heating effect.

[0050] Figure 1 This is a schematic diagram of the air conditioning gas replenishment and enthalpy enhancement system provided in an embodiment of the present invention. Please refer to it. Figure 1 The air conditioning enthalpy boosting system in this embodiment may include: an enthalpy boosting compressor ( Figure 1 The part within the dashed box is the enthalpy-increasing gas compressor, the first electronic expansion valve, the second electronic expansion valve, the first two-way valve, the second two-way valve, the third two-way valve, and the flash evaporator.

[0051] The suction end of the enthalpy-increasing air supplement compressor is connected with the first end of a four-way valve in the air conditioning system for switching heating and dehumidifying modes; the exhaust end of the enthalpy-increasing air supplement compressor is connected with the third end of the four-way valve; the air supplement end of the enthalpy-increasing air supplement compressor is connected with the first end of the first two-way valve; the second end of the first two-way valve is connected with the first end of the flash vapor; the first end of the second two-way valve is connected with the first end of the first electronic expansion valve, and the first end of the second two-way valve is connected with the second end of the four-way valve through the indoor side of the air conditioning system; the second end of the second two-way valve is connected with the first end of the third two-way valve; the second end of the third two-way valve is connected with the second end of the second electronic expansion valve, and the second end of the third two-way valve is connected with the fourth end of the four-way valve through the outdoor side of the air conditioning system; the first end of the second electronic expansion valve is connected with the third end of the flash vapor; the second end of the flash vapor is connected with the second end of the first electronic expansion valve; and the first end of the first electronic expansion valve is also connected with the second end of the four-way valve through the indoor side of the air conditioning system; and the second end of the second electronic expansion valve is also connected with the fourth end of the four-way valve through the outdoor side of the air conditioning system.

[0052] On this basis, when defrosting or frosting is needed (the frosting treatment mode mentioned in the present application is divided into two kinds, the first kind is defrosting or frosting, and the other kind is frosting suppression, and the basic definition or essential principle can be understood based on the existing air conditioning system, and will not be described here), the first electronic expansion valve and the second electronic expansion valve are opened to the maximum opening degree before the switching of the four-way valve, so as to reduce the switching pressure difference of the four-way valve, improve the defrosting effect and efficiency.

[0053] Needless to say, Figure 1 Among them, the suction end corresponds to the gas-liquid separator of the compressor (i.e. the enthalpy-increasing air supplement compressor), the exhaust end corresponds to the main shaft body of the compressor, and the air supplement end corresponds to the air supplement pipe of the compressor, which together constitute the enthalpy-increasing air supplement compressor.

[0054] On this basis, the present application provides an air conditioning air supplement and enthalpy-increasing method, which is applied to the air conditioning air supplement and enthalpy-increasing system as described above, Figure 2 is a flowchart of the air conditioning air supplement and enthalpy-increasing method provided by the embodiment of the present application, and the method as shown in Figure 2 may specifically include:

[0055] S101, collecting the outdoor environment temperature of the air conditioning system.

[0056] S102, judging whether the outdoor environment temperature is lower than or equal to the frosting suppression lower limit environment temperature, if yes, the defrosting mode is applied; if no, the air conditioning outdoor pipe temperature is collected.

[0057] S103, judging whether the air conditioning outdoor pipe temperature is lower than or equal to the frosting suppression lower limit outdoor pipe temperature, if yes, the defrosting mode is applied; if no, the frosting suppression mode is applied.

[0058] It should be noted that the air conditioner gas supplement and enthalpy increase method provided in the present application is only applied in the defrosting or frost suppression related stage, and the working conditions of other stages of the air conditioning system are not controlled. For the working conditions of other stages, the air conditioning system can be controlled based on the existing control logic.

[0059] Specifically, in the current working condition, the selection of which frost treatment mode needs to meet the pre-determination condition. First, it is judged whether the outside environment temperature of the air conditioning system, that is, the outer ring temperature T1, is less than or equal to the frost suppression lower limit environment temperature, that is, the preset value 1.

[0060] When the outer ring temperature T1 is less than or equal to the preset value 1, the defrosting mode is applied (in actual application, in order to ensure the stability of the system, the specific application can be that the system directly enters the defrosting mode when the next time the system reaches the above condition and needs to be treated for frost).

[0061] Further, if the outer ring temperature T1 is higher than the preset value 1, the air conditioning outer pipe temperature (that is, the refrigerant temperature before the condenser enters the capillary tube) is collected, and the air conditioning outer pipe temperature is continuously judged. Specifically, if the outer pipe temperature T2 is less than or equal to the frost suppression lower limit outer pipe temperature, that is, the preset value 2, if so, it is considered that there are adverse conditions such as "frozen rain" in this working condition, and the defrosting mode is applied, such as the defrosting mode will be used for the next time frost treatment of the system. If the outer pipe temperature is higher than the frost suppression lower limit outer pipe temperature, this working condition can be regarded as a normal heating working condition, and the frost suppression mode can be satisfied, and the frost suppression mode is used for the next time frost treatment.

[0062] Figure 3 is a flowchart of the air conditioner gas supplement and enthalpy increase method provided by another embodiment of the present application, in which Figure 3 in the temperature judgment at the beginning, the left side is the application of the frost suppression mode, and the right side is the application of the defrosting mode, as shown in Figure 3

[0063] In the frost suppression mode: the frequency of the enthalpy increase and gas supplement compressor is reduced to the first preset frequency, that is, F1, the first electronic expansion valve and the second electronic expansion valve are opened to the maximum opening degree, the first two-way valve and the second two-way valve are closed, and the third two-way valve is opened; and in the frost suppression mode, the air conditioning system remains in the heating state. And during the application of the frost suppression mode, when it is detected that the air conditioning outer pipe temperature rises to the preset temperature, or it is determined that the frost suppression mode runs for a preset time, the frost suppression mode is exited. The specific execution actions of exiting the frost suppression mode include controlling the frequency of the enthalpy increase and gas supplement compressor to rise, and controlling the third two-way valve to close, the first two-way valve to open, the first electronic expansion valve and the second electronic expansion valve to adjust to the expansion valve opening degree before entering the frost suppression, so that the air conditioning system enters the next heating cycle.

[0064] ​In defrost mode: the enthalpy-increasing compressor reduces to the second preset frequency, the first two-way valve closes, the second two-way valve opens, the third two-way valve closes, and the first and second electronic expansion valves open to their maximum opening. After a preset time, the four-way valve is directly reversed to switch from heating to cooling mode. Furthermore, during the application of defrost mode, when the external pipe temperature is detected to rise to a preset temperature, the defrost mode is exited. Specifically, exiting defrost mode involves: controlling the enthalpy-increasing compressor to rise to the third preset frequency, and controlling the first two-way valve to open, the second and third two-way valves to close, and the first and second electronic expansion valves to return to their opening degrees before entering defrost mode.

[0065] Specifically, such as Figure 3 As shown, in defrost mode, the unit will maintain heating mode, the compressor frequency will first be reduced to the first preset frequency F1, and the first and second electronic expansion valves will be opened to the maximum degree to increase the evaporation temperature of the refrigerant in the outdoor unit.

[0066] Furthermore, to avoid liquid refrigerant entering the compressor through the gas injection pipe and causing liquid slugging when the frequency is reduced and the expansion valve is fully open, the first two-way valve can be closed, the second two-way valve can be kept closed, and the third two-way valve can be opened to mix the room temperature refrigerant after throttling by the first electronic expansion valve with the low temperature refrigerant after throttling by the second electronic expansion valve, so as to increase the temperature of the refrigerant entering the evaporator.

[0067] Once the outdoor frost melts, the pipe temperature rises to the preset temperature, such as the defrost exit temperature, or the defrost mode has been running for a preset duration. Then, the defrost mode is exited, the compressor frequency is increased, the third two-way valve is closed, the first two-way valve is opened, and the first and second electronic expansion valves are adjusted to the opening degree before entering defrost, thus entering the next heating cycle.

[0068] In defrost mode, the unit switches to cooling mode for defrosting while maintaining compressor operation. The compressor frequency is first reduced to the second preset frequency F2 to prevent liquid slugging. The first two-way valve closes, the second two-way valve opens, and the first and second electronic expansion valves open to their maximum opening to reduce the pressure difference at the four-way valve reversing position. After the frequency reduction reaches the preset time, the four-way valve will directly reverse while keeping the compressor running, switching from heating to cooling mode, and the frequency rises to the preset defrost frequency. During this stage, to prevent indoor unit icing from causing greater fluctuations in the indoor environment, the second two-way valve (principle is the same as the third two-way valve in the defrost mode) mixes the room-temperature refrigerant throttled by the second electronic expansion valve with the low-temperature refrigerant throttled by the first electronic expansion valve, increasing the temperature of the refrigerant entering the evaporator and reducing the degree of frost buildup on the indoor unit.

[0069] Run until the tube temperature rises to the defrost exit tube temperature, when the outer tube temperature meets this temperature, the compressor also remains in operation, the frequency is reduced to the preset frequency F3, the four-way valve is directly powered to reverse, the heating is switched to refrigeration, and the first two-way valve is opened and the second two-way valve is closed. The frequency starts to rise to the pre-defrosting operation frequency, and the first and second electronic expansion valves adjust the valve opening degree to the preset valve opening degree. The next round of heating period is started.

[0070] Figure 4 The application principle diagram of the air conditioner gas supplementing and enthalpy increasing method provided by the embodiment of the application is as shown in Figure 4 The air conditioner gas supplementing and enthalpy increasing method provided by the application first determines which frost treatment is suitable for the current working condition based on the outside environment temperature and the outer tube temperature, that is, whether the frost is suitable for "suppression" or "defrosting", and then performs the frost treatment by using the mode, that is, the frost treatment is performed. During the defrosting process, when the preset outer tube temperature (or the running time reaches the preset time length) is reached, it is judged that the defrosting is ended, that is, the suppression mode or the defrosting mode is exited, including adjusting the two-way tube and the four-way tube, and starting the next heating period.

[0071] In the air conditioner gas supplementing and enthalpy increasing method, the defrosting mode is used for the industry commonly used stop defrosting mode, and in the defrosting running stage, the second two-way valve is used for supplementing air to slow down the indoor icing speed, and in the starting and ending stages, the four-way valve is switched without stopping, so that the unit can enter and exit the defrosting state more quickly, and the influence of the defrosting operation on the indoor working condition is avoided as much as possible, and the cold prevention mode can be exited more quickly, so that the heating effect is improved.

[0072] And after entering the next heating period, a new round of detection is started after a preset time length, such as 10 min, and the above process is repeated. In this way, under the poor heating condition, the combined treatment mode of using heat recovery and rapid reversing defrosting is realized without introducing external heat sources, so that the optimal solution to the air conditioner system defrosting problem is achieved.

[0073] The air conditioner gas supplement and enthalpy increasing method provided in the application, under a conventional low-temperature working condition, through a flash evaporator device of a gas supplement and enthalpy increasing compressor, the gas supplement part and the throttled low-temperature refrigerant are combined, the gas supplement is performed in advance at the evaporation side, the enthalpy value of the refrigerant entering the evaporator is increased, the temperature of the evaporation side is increased, the frost suppression achieves the effect of delaying the frosting of the outdoor unit; meanwhile, under an extreme low-temperature working condition (for example, freezing rain), under the premise of not introducing an external heat source, compared with the conventional compressor start-stop and four-way switching, the fast switching technology can shorten the defrosting time, has higher efficiency, and can exit the cold prevention faster; and under a lower temperature condition, the unit still needs to be defrosted by switching to ensure the heating effect, in the refrigeration state during the switching defrosting, more liquid refrigerant is stored in the flash evaporator again, at this time, the gas supplement switch of the compressor can be closed to avoid the liquid strike caused by the liquid refrigerant entering the compressor; and during the conventional defrosting stage, through a pipeline device, the method similar to the frost suppression is used to supplement the gas in advance at the inside, the excessive icing of the indoor unit during the conventional switching defrosting stage is avoided, the cold prevention is exited faster, and the next cycle of heating is started; and the air conditioner gas supplement and enthalpy increasing method provided in the application does not need to introduce an external additional device, and the flash evaporator device of the gas supplement and enthalpy increasing unit itself can achieve the above-mentioned purposes, has strong applicability, and is easy to popularize.

[0074] Based on the same inventive concept, the application further provides an air conditioner gas supplement and enthalpy increasing device. Figure 5 As shown in the figure, the device comprises a processor and a memory, the processor 1 is connected with the memory 2: wherein the processor 1 is used for calling and executing the program stored in the memory 2; the memory 2 is used for storing the program, and the program is at least used for executing the air conditioner gas supplement and enthalpy increasing method.

[0075] The specific implementation scheme of the air conditioner gas supplement and enthalpy increasing device provided in the embodiments of the application can refer to the implementation mode of the air conditioner gas supplement and enthalpy increasing method of any of the above embodiments, which will not be described here in detail.

[0076] Based on the same inventive concept, the application further provides an air conditioner system, comprising an air conditioner main body and an air conditioner gas supplement and enthalpy increasing system as described above.

[0077] It can be understood that the same or similar parts in the above embodiments can be mutually referred to, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.

[0078] It should be noted that, in the description of the application, the terms "first", "second", etc. are only used for the purpose of description, and cannot be understood as indicating or implying relative importance. In addition, in the description of the application, unless otherwise specified, the meaning of "a plurality of" is at least two.

[0079] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.

[0080] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0081] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0082] Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.

[0083] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.

[0084] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0085] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. An air conditioning air-supply enthalpy-increasing system, characterized by, Comprise: An enthalpy-increasing charge air compressor, a first electronic expansion valve, a second electronic expansion valve, a first two-way valve, a second two-way valve, a third two-way valve, and a flash evaporator; The suction end of the enthalpy-increasing charge air compressor is connected with the first end of a four-way valve in an air conditioning system for switching heating and dehumidifying modes; the exhaust end of the enthalpy-increasing charge air compressor is connected with the third end of the four-way valve; the charge end of the enthalpy-increasing charge air compressor is connected with the first end of the first two-way valve; the second end of the first two-way valve is connected with the first end of the flash evaporator; The first end of the second two-way valve is connected with the first end of the first electronic expansion valve, and the first end of the second two-way valve is connected with the second end of the four-way valve through the indoor side of the air conditioning system; the second end of the second two-way valve is connected with the first end of the third two-way valve, and the second end of the second two-way valve is connected with the first end of the flash evaporator; The first end of the third two-way valve is connected with the first end of the flash evaporator, the second end of the third two-way valve is connected with the second end of the second electronic expansion valve, and the second end of the third two-way valve is connected with the fourth end of the four-way valve through the outdoor side of the air conditioning system; the first end of the second electronic expansion valve is connected with the third end of the flash evaporator; the second end of the flash evaporator is connected with the second end of the first electronic expansion valve; The first end of the first electronic expansion valve is also connected with the second end of the four-way valve through the indoor side of the air conditioning system; the second end of the second electronic expansion valve is also connected with the fourth end of the four-way valve through the outdoor side of the air conditioning system; The first electronic expansion valve and the second electronic expansion valve are used to open to the maximum opening degree before the reversing of the four-way valve, so as to reduce the reversing pressure difference of the four-way valve.

2. The air conditioning air supplementing and enthalpy increasing method applied to the air conditioning air supplementing and enthalpy increasing system as claimed in Claim 1, characterized in that, Comprise: Collecting the outdoor environment temperature of the air conditioning system; Judging whether the outdoor environment temperature is lower than or equal to the lower limit of frost suppression environment temperature, if yes, applying the defrosting mode; if no, collecting the air conditioning outer pipe temperature; Judging whether the air conditioning outer pipe temperature is lower than or equal to the lower limit of frost suppression outer pipe temperature, if yes, applying the defrosting mode; if no, applying the frost suppression mode.

3. The air conditioning supplemental enthalpy adding method of claim 2, wherein, In the frost suppression mode: The frequency of the enthalpy-increasing charge air compressor is reduced to a first preset frequency, the first electronic expansion valve and the second electronic expansion valve are opened to the maximum opening degree, the first two-way valve and the second two-way valve are closed, and the third two-way valve is opened; And in the frost suppression mode, the air conditioning system remains in the heating state.

4. The air conditioning supplemental enthalpy adding method of claim 2, wherein, Further comprise: In the process of applying the frost suppression mode, further comprising: When it is detected that the air conditioning outer pipe temperature rises to a preset temperature, or it is determined that the frost suppression mode runs for a preset time length, the frost suppression mode is exited.

5. The air conditioning supplemental enthalpy adding method of claim 4, wherein, The exit of the frost suppression mode comprises: Controlling the frequency of the enthalpy-increasing charge air compressor to rise, and controlling the third two-way valve to be closed, the first two-way valve to be opened, and the first electronic expansion valve and the second electronic expansion valve to be adjusted to the expansion valve opening degree before entering the frost suppression, so that the air conditioning system enters the next heating cycle.

6. The air conditioning supplemental enthalpy adding method of claim 2, wherein, In the defrosting mode: The enthalpy-increasing supplementary gas compressor is reduced to a second preset frequency, the first two-way valve is closed, the second two-way valve is opened, the third two-way valve is closed, and the first electronic expansion valve and the second electronic expansion valve are opened to the maximum opening degree. And after a preset time length, the four-way valve is directly reversed to switch from the heating state to the cooling state.

7. The air conditioning supplemental enthalpy adding method of claim 2, wherein, In the application of the defrosting mode, further comprising: When the outside pipe temperature of the air conditioner is detected to rise to a preset temperature, the defrosting mode is exited.

8. The air conditioning supplemental enthalpy adding method of claim 7, wherein, The exiting of the defrosting mode comprises: The enthalpy-increasing supplementary gas compressor is controlled to rise to a third preset frequency, the first two-way valve is opened, the second two-way valve and the third two-way valve are closed, and the first electronic expansion valve and the second electronic expansion valve are restored to the opening degree before entering the defrosting mode.

9. An air conditioning supplemental gas enthalpy augmentation device characterized by, The system comprises a processor and a memory, and the processor is connected with the memory. The processor is used to call and execute the program stored in the memory. The memory is used to store the program, and the program is used to execute the air conditioner supplementary gas enthalpy-increasing method in any one of claims 2-8.

10. An air conditioning system characterized by, The system comprises an air conditioner main body and the air conditioner supplementary gas enthalpy-increasing system in claim 1.

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