An air conditioner

Abstract

This application provides an air conditioner, comprising a first heat exchanger, a compressor, a second heat exchanger, a second pipeline, an electronic expansion valve, and the first pipeline connected in sequence. The first pipeline connects the electronic expansion valve and the first heat exchanger. The air conditioner also includes a liquid receiver, a first solenoid valve, and a pressure pump. The first solenoid valve controls the flow of refrigerant from the liquid receiver to the first pipeline, and the pressure pump pressurizes the liquid receiver. In both heating and cooling modes, opening the first solenoid valve and using the pressure pump to pump refrigerant into the first pipeline enables the air conditioner to achieve better heating and cooling performance, improves its energy efficiency ratio, and achieves better operating conditions.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to an air conditioner. Background Technology

[0002] The refrigerant in household air conditioners is charged to a fixed amount during machine production. The actual amount of refrigerant required by the refrigerant circulation system varies for each operating condition and mode, making it difficult for the air conditioner to achieve optimal efficiency.

[0003] Currently, a valve-free receiver is typically installed after the condenser and before the electronic expansion valve. While the receiver reduces the circulation space occupied by liquid refrigerant, it also requires injecting more refrigerant into the refrigerant circulation system to ensure the compressor's discharge temperature does not exceed the limit and thus extend its lifespan. As the amount of refrigerant circulating in the refrigerant circulation system increases, the input power of the refrigerant circulation system also increases. The advantages of the increased condensing space are offset by the increased power, so this approach needs improvement. Utility Model Content

[0004] This utility model provides an air conditioner to solve the technical problem that it is difficult for an air conditioner to achieve good working efficiency in different modes when the refrigerant is charged to a fixed amount.

[0005] To achieve the above objectives, this application proposes an air conditioner comprising a first heat exchanger, a compressor, a second heat exchanger, a second pipeline, an electronic expansion valve, and a first pipeline connected in sequence, wherein the first pipeline is connected between the electronic expansion valve and the first heat exchanger.

[0006] The air conditioner also includes a liquid receiver, a first solenoid valve, and a pressure pump. The first solenoid valve is used to control the flow of refrigerant from the liquid receiver to the first pipeline, and the pressure pump is used to pressurize the liquid receiver.

[0007] Optionally, in one embodiment, a second solenoid valve is further included, which is used to control the flow of refrigerant in the second pipeline to the liquid reservoir.

[0008] Optionally, in one embodiment, the first heat exchanger is installed indoors, the second heat exchanger is installed outdoors, the first solenoid valve is used to control the flow of refrigerant in the reservoir to the first pipeline, and the second solenoid valve is used to deliver refrigerant in the second pipeline to the reservoir.

[0009] Optionally, in one embodiment, the first heat exchanger is installed indoors, and the second heat exchanger is installed outdoors;

[0010] It also includes a third solenoid valve. The liquid reservoir is provided with a liquid outlet. The first solenoid valve is used to transport a portion of the refrigerant flowing out of the liquid outlet to the first pipeline, and the third solenoid valve is used to transport a portion of the refrigerant flowing out of the liquid outlet to the second pipeline.

[0011] Optionally, in one embodiment, the first heat exchanger is installed indoors, and the second heat exchanger is installed outdoors;

[0012] It also includes a fourth solenoid valve. The liquid reservoir is provided with an inlet end and an outlet end. The first solenoid valve is connected between the outlet end and the first pipeline, and the fourth solenoid valve is connected between the inlet end and the first pipeline.

[0013] Optionally, in one embodiment, a second solenoid valve and a third solenoid valve are further included. The liquid reservoir is provided with an inlet end and an outlet end. The second solenoid valve is used to transport the refrigerant in the second pipeline to the liquid reservoir. The third solenoid valve is used to transport a portion of the refrigerant flowing out of the outlet end to the second pipeline. The first solenoid valve is used to transport a portion of the refrigerant flowing out of the outlet end to the first pipeline.

[0014] Optionally, in one embodiment, the first heat exchanger is installed indoors, and the second heat exchanger is installed outdoors;

[0015] It also includes a fourth solenoid valve, which is used to deliver the refrigerant in the first pipeline to the liquid inlet.

[0016] Optionally, in one embodiment, a switching valve is further included, which is used to control the flow of refrigerant from the outlet end to the first solenoid valve and the third solenoid valve.

[0017] Optionally, in one embodiment, a flow meter is also included, which is used to control the flow rate from the switching valve to the first solenoid valve or the third solenoid valve.

[0018] Optionally, in one embodiment, the liquid reservoir is provided with a liquid inlet, and the pressure pump is connected between the liquid inlet and the second pipeline.

[0019] The air conditioner provided in this application, by setting a first solenoid valve in the bypass of the first pipeline, opens the first solenoid valve and uses a pressure pump to pump refrigerant into the first pipeline during air conditioning heating and cooling conditions, so that the air conditioner can achieve better cooling and heating effects, improve the energy efficiency ratio of the air conditioner, and achieve better operating conditions. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a flow path diagram of the air conditioner of this application, which includes a first solenoid valve and a second solenoid valve.

[0022] Figure 2 This is a flow path diagram of the air conditioner of this application, which includes a first solenoid valve, a second solenoid valve, and a third solenoid valve.

[0023] Figure 3 This is a flow path diagram of the air conditioner of this application, which includes a first solenoid valve and a fourth solenoid valve.

[0024] Figure 4 This is a schematic diagram of the flow path of the air conditioner under cooling and heating conditions according to this application;

[0025] Figure 5 This is a schematic diagram of the flow path of the air conditioner in this application when the first solenoid valve is opened under cooling conditions;

[0026] Figure 6 This is a schematic diagram of the flow path of the air conditioner in this application when the second solenoid valve is opened under cooling conditions;

[0027] Figure 7 This is a schematic diagram of the flow path when the third solenoid valve of the air conditioner in this application is opened under heating conditions;

[0028] Figure 8 This is a schematic diagram of the flow path when the fourth solenoid valve of the air conditioner in this application is opened under heating conditions.

[0029] Explanation of icon numbers:

[0030] 1. First heat exchanger; 2. Compressor; 3. Second heat exchanger; 4. Second pipeline; 5. Electronic expansion valve; 6. First pipeline; 7. Liquid receiver; 8. Pressure pump; 9. Switch valve; 10. Flow meter; 11. First solenoid valve; 12. Second solenoid valve; 13. Third solenoid valve; 14. Fourth solenoid valve.

[0031] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Furthermore, it should be understood that the specific embodiments described herein are only for illustration and explanation of the present utility model and are not intended to limit the present utility model.

[0033] In the description of this application, it should be understood that the terms "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplification, and do not indicate or imply that the device or element referred to must have a unique orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] "A and / or B" includes the following three combinations: A only, B only, and a combination of A and B.

[0036] The use of "applies to" or "configured to" in this application implies open and inclusive language, which does not exclude the applicability to or configuration to devices performing additional tasks or steps. Additionally, the use of "based on" implies openness and inclusivity, because processes, steps, calculations, or other actions "based on" one or more of the stated conditions or values ​​may in practice be based on additional conditions or values ​​beyond those stated.

[0037] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0038] In this application, cooling load refers to the amount of heat that needs to be removed from a space or object per unit time to maintain a target temperature (usually lower than the ambient temperature). Heat load refers to the amount of heat that needs to be added to a space or object per unit time to maintain a target temperature (usually higher than the ambient temperature).

[0039] This application provides an air conditioner to address the problem that a fixed refrigerant charge makes it difficult for the air conditioner to achieve good operating efficiency in different modes. The following description, in conjunction with the accompanying drawings, will illustrate this.

[0040] In the embodiments of this application, such as Figure 1 As shown, the air conditioner includes a first heat exchanger 1, a compressor 2, a second heat exchanger 3, a second pipeline 4, an electronic expansion valve 5, and a first pipeline 6 connected in sequence. The first pipeline 6 is connected between the electronic expansion valve 5 and the first heat exchanger 1.

[0041] The air conditioner also includes a liquid receiver 7, a first solenoid valve 11, and a pressure pump 8. The first solenoid valve 11 is used to control the flow of refrigerant from the liquid receiver 7 to the first pipeline 6, and the pressure pump 8 is used to pressurize the liquid receiver 7.

[0042] It should be noted that the electronic expansion valve 5 refers to a component that precisely regulates the flow rate of refrigerant within the air conditioner through electronic control. The receiver 7 refers to a component used to store refrigerant. The first heat exchanger 1, the compressor 2, and the second heat exchanger 3 are connected by pipelines. The first heat exchanger 1 and the second heat exchanger 3 are respectively located indoors and outdoors. The pressure pump 8 refers to a device driven mechanically or electrically to increase the pressure of a fluid (liquid or gas) to achieve fluid transport or pressurization; the refrigerant in the receiver 7 can only flow out under the action of the pressure pump 8.

[0043] A three-way valve should be installed on the first pipeline 6 to connect with the first solenoid valve 11. This pipeline connection method is existing technology and will not be described in detail here. The first heat exchanger 1, compressor 2, second heat exchanger 3, second pipeline 4, electronic expansion valve 5, and first pipeline 6 form a circulation loop.

[0044] It is understood that this embodiment includes two scenarios. Scenario 1: In cooling mode, when the first heat exchanger 1 is located indoors and the second heat exchanger 3 is located outdoors, the first heat exchanger 1 is also the evaporator, and the second heat exchanger 3 is also the condenser. The refrigerant flows sequentially through the second pipe 4, the electronic expansion valve 5, and the first pipe 6. Due to the increased room cooling load in hot weather, the air conditioner needs to operate at high frequency in cooling mode, resulting in insufficient refrigerant charge in the circulation loop. At this time, the first solenoid valve 11 needs to be opened, and the pressure pump 8 needs to release a certain amount of refrigerant into the first pipe 6 to replenish the insufficient refrigerant in the circulation loop, achieving the target cooling requirements and meeting the user's cooling needs in hot weather. In related technologies, the opening of the electronic expansion valve 5 is increased to reduce the discharge temperature of the compressor 2. However, because more refrigerant cannot be supplied to the circulation loop, the excessively large opening of the electronic expansion valve 5 leads to insufficient subcooling of the first heat exchanger 1, resulting in a loss of cooling capacity and energy efficiency ratio.

[0045] Scenario 2: In heating mode, when the first heat exchanger 1 is located outdoors and the second heat exchanger 3 is located indoors, the first heat exchanger 1 is also the condenser, and the second heat exchanger 3 is also the evaporator. The refrigerant flows sequentially through the second pipe 4, the electronic expansion valve 5, and the first pipe 6. During heating mode, when the frequency of the first heat exchanger 1 and the second heat exchanger 3 increases, insufficient refrigerant in the circulation loop leads to a decrease in the refrigerant evaporation temperature, reducing the heat absorption capacity of the first heat exchanger 1. Simultaneously, this causes a sharp increase in the discharge temperature of the compressor 2, affecting its service life. In this case, by opening the first solenoid valve 11 and using the pressure pump 8 to release more refrigerant into the first pipe 6, the amount of refrigerant in the circulation loop is increased, raising the evaporation pressure of the first heat exchanger 1 and lowering the discharge temperature of the compressor 2.

[0046] When the outdoor temperature is low, such as between -2℃ and 2℃, water vapor in the outdoor air easily condenses on the surface of the first heat exchanger 1 under heating conditions. At this time, by opening the first solenoid valve 11 and using the pressure pump 8 to release more refrigerant into the first pipeline 6, the evaporation pressure of the first heat exchanger 1 is increased, and the corresponding evaporation temperature also rises, thereby delaying frost formation.

[0047] In some embodiments, such as Figure 1 As shown, the air conditioner also includes a second solenoid valve 12, which is used to control the flow of refrigerant from the second pipeline 4 to the liquid receiver 7.

[0048] It should be noted that a three-way valve should be installed on the second pipeline 4 to connect with the second solenoid valve 12. This pipeline connection method is existing technology and will not be elaborated further. The pressure direction of the pressure pump 8 is unidirectional. That is, when the pressure pump 8 is pressurized, it can pump the refrigerant in the liquid receiver 7 into the first pipeline 6, or pump the refrigerant in the second pipeline 4 into the liquid receiver 7. The inflow and outflow of refrigerant in the liquid receiver 7 can only be achieved under the action of the pressure pump 8. Therefore, it can be concluded that the pressure pump 8 is connected between the second solenoid valve 12 and the liquid receiver 7.

[0049] It is understood that this embodiment includes two scenarios. Scenario 1: When the first heat exchanger 1 is located indoors and the second heat exchanger 3 is located outdoors, under cooling conditions, the first heat exchanger 1 (evaporator) and the second heat exchanger 3 (condenser) flow sequentially through the second pipe 4, the electronic expansion valve 5, and the first pipe 6. When the room cooling load decreases, the air conditioner enters low-frequency operation, and the refrigerant charge in the circulation loop is excessive, resulting in an increase in the amount of liquid refrigerant retained in the second heat exchanger 3. This compresses the effective heat exchange area, reduces heat dissipation efficiency, and increases the pressure load on the air conditioner. At this time, by opening the second solenoid valve 12 and the pressure pump 8, the refrigerant in the second pipe 4 is pumped into the receiver 7, reducing the flow rate in the circulation loop and lowering energy consumption.

[0050] Scenario 2: In heating mode, when the first heat exchanger 1 is located outdoors and the second heat exchanger 3 is located indoors, the first heat exchanger 1 is the condenser, and the second heat exchanger 3 is the evaporator. The refrigerant flows sequentially through the second pipe 4, the electronic expansion valve 5, and the first pipe 6. When the indoor heat load decreases, or when the first heat exchanger 1 operates at a higher rate, the air conditioner operates at a lower frequency. In this case, it is necessary to reduce the amount of refrigerant in the circulation loop. By opening the second solenoid valve 12 and the pressure pump 8, the refrigerant in the second pipe 4 is pumped into the receiver 7, reducing the flow rate in the circulation loop and lowering energy consumption.

[0051] In some embodiments, such as Figure 1 As shown, the first heat exchanger 1 is installed indoors, the second heat exchanger 3 is installed outdoors, the first solenoid valve 11 is used to control the flow of refrigerant in the liquid receiver 7 to the first pipeline 6, and the second solenoid valve 12 is used to transport the refrigerant in the second pipeline 4 to the liquid receiver 7.

[0052] It should be noted that "the first heat exchanger 1 is for indoor installation" means that the first heat exchanger 1 is an indoor heat exchanger, and "the second heat exchanger 3 is for outdoor installation" means that the second heat exchanger 3 is an outdoor heat exchanger. In refrigeration mode, the indoor heat exchanger acts as a condenser, and the outdoor heat exchanger acts as an evaporator. The pressure pump 8 is connected between the second solenoid valve 12 and the liquid receiver 7.

[0053] Understandably, in cooling mode, during hot weather, the room's cooling load increases. The first solenoid valve 11 opens, and the pressure pump 8 releases a fixed amount of refrigerant into the first pipe 6 to replenish the refrigerant in the circulation loop, achieving the target cooling requirements and meeting the user's cooling needs during hot weather. In cooling mode, when the room's cooling load decreases, the air conditioner enters low-frequency operation. By opening the second solenoid valve 12 and the pressure pump 8, the refrigerant in the second pipe 4 is pumped into the receiver 7, reducing the flow rate in the circulation loop and lowering energy consumption.

[0054] Furthermore, it is not difficult to imagine that in this embodiment, the liquid reservoir 7 and the electronic expansion valve 5 are connected in parallel.

[0055] For example, in this embodiment, the air conditioner also includes a flow meter 10, which is connected between the liquid receiver 7 and the first solenoid valve 11. The flow meter 10 regulates the amount of refrigerant injected into the circulation loop so that the various operating parameters of the air conditioner reach a reasonable level, thereby improving the energy efficiency ratio of the air conditioner and reducing energy consumption.

[0056] In some embodiments, the first heat exchanger 1 is installed indoors, and the second heat exchanger 3 is installed outdoors;

[0057] The air conditioner also includes a third solenoid valve 13, a liquid receiver 7 is provided with a liquid outlet, a first solenoid valve 11 is used to transport part of the refrigerant flowing out of the liquid outlet to the first pipeline 6, and a third solenoid valve 13 is used to transport part of the refrigerant flowing out of the liquid outlet to the second pipeline 4.

[0058] It should be noted that "the first heat exchanger 1 is for indoor installation" means that the first heat exchanger 1 is an indoor heat exchanger, and "the second heat exchanger 3 is for outdoor installation" means that the second heat exchanger 3 is an outdoor heat exchanger. In cooling mode, the indoor heat exchanger acts as a condenser, and the outdoor heat exchanger acts as an evaporator. In heating mode, the indoor heat exchanger acts as an evaporator, and the outdoor heat exchanger acts as a condenser. The pressure pump 8 is connected between the second solenoid valve 12 and the liquid receiver 7.

[0059] It is understandable that after the refrigerant flows out from the liquid outlet, it splits into two flow paths. The first flow path flows to the first pipe 6 through the first solenoid valve 11, and the second flow path flows to the second pipe 4 through the third solenoid valve 13. In cooling mode, when the amount of refrigerant injected into the circulation loop is low, refrigerant can be pumped into the first pipe 6 through the first flow path to replenish the missing refrigerant. In heating mode, if the refrigerant in the circulation loop is insufficient, refrigerant can be pumped into the second pipe 4 through the second flow path. At this time, the first solenoid valve 11 is closed to cut off the first flow path, thereby replenishing the missing refrigerant. The first solenoid valve 11 and the third solenoid valve 13 address the technical problem of insufficient refrigerant charge in both cooling and heating modes, enabling flexible adjustment of the refrigerant charge in the circulation loop. In this embodiment, refer to... Figure 2 In the partial location setting, the pressure pump 8 should be set in the outflow direction of the liquid reservoir 7.

[0060] It is easy to understand that a three-way valve should be provided to connect the liquid reservoir 7 with the first solenoid valve 11 and the second solenoid valve 12. This pipeline connection method is existing technology and will not be described in detail.

[0061] In some embodiments, such as Figure 3 As shown, the first heat exchanger 1 is installed indoors, and the second heat exchanger 3 is installed outdoors;

[0062] The air conditioner also includes a fourth solenoid valve 14, a liquid receiver 7 is provided with an inlet end and an outlet end, a first solenoid valve 11 is connected between the outlet end and the first pipeline 6, and a fourth solenoid valve 14 is connected between the inlet end and the first pipeline 6.

[0063] It should be noted that "the first heat exchanger 1 is for indoor installation" means that the first heat exchanger 1 is an indoor heat exchanger, and "the second heat exchanger 3 is for outdoor installation" means that the second heat exchanger 3 is an outdoor heat exchanger. In cooling mode, the indoor heat exchanger acts as a condenser, and the outdoor heat exchanger acts as an evaporator. In heating mode, the indoor heat exchanger acts as an evaporator, and the outdoor heat exchanger acts as a condenser.

[0064] Understandably, in cooling mode, during hot weather, the room's cooling load increases. The first solenoid valve 11 opens, and the pressure pump 8 releases a fixed amount of refrigerant into the first pipe 6 to replenish the refrigerant in the circulation loop, achieving the target cooling requirement and meeting the user's cooling needs during hot weather. In heating mode, when the indoor heat load decreases or the first heat exchanger 1 operates at a higher frequency, the air conditioner operates at a lower frequency. The fourth solenoid valve 14 pumps the refrigerant from the first pipe 6 into the receiver 7, reducing the refrigerant flow in the circulation loop and lowering energy consumption. It is easy to imagine that the pressure pump 8 is connected between the fourth solenoid valve 14 and the inlet of the receiver 7.

[0065] In some embodiments, such as Figure 2 As shown, the air conditioner also includes a second solenoid valve 12 and a third solenoid valve 13. The liquid receiver 7 is provided with an inlet end and an outlet end. The second solenoid valve 12 is used to transport the refrigerant in the second pipeline 4 to the liquid receiver 7. The third solenoid valve 13 is used to transport part of the refrigerant flowing out of the outlet end to the second pipeline 4. The first solenoid valve 11 is used to transport part of the refrigerant flowing out of the outlet end to the first pipeline 6.

[0066] Understandably, when the first heat exchanger 1 is the indoor heat exchanger and the second heat exchanger 3 is the outdoor heat exchanger, in cooling mode, the first solenoid valve 11, through the action of the pressure pump 8, can replenish the missing refrigerant in the circulation loop to meet the high-frequency operation requirements of the air conditioner when the room cooling load increases. The second solenoid valve 12 can pump excess refrigerant in the circulation loop into the receiver 7 to meet the low-frequency operation requirements of the air conditioner when the room cooling load decreases. In heating mode, the third solenoid valve 13 can replenish the missing refrigerant in the circulation return flow to meet the high-frequency operation requirements of the air conditioner when the room temperature rises. This achieves the goal of enabling the air conditioner to operate with high efficiency under various operating conditions.

[0067] In some embodiments, such as Figure 3 As shown, the first heat exchanger 1 is installed indoors, and the second heat exchanger 3 is installed outdoors;

[0068] It also includes a fourth solenoid valve 14, which is used to deliver the refrigerant in the first pipeline 6 to the liquid inlet.

[0069] It should be noted that the first heat exchanger 1 is an indoor heat exchanger, and the second heat exchanger 3 is an outdoor heat exchanger.

[0070] Understandably, in cooling mode, the first solenoid valve 11 replenishes the refrigerant in the circulation loop through the action of the pressure pump 8, meeting the requirements for high-frequency operation of the air conditioner when the room cooling load increases. The second solenoid valve 12 pumps excess refrigerant in the circulation loop into the receiver 7, meeting the requirements for low-frequency operation of the air conditioner when the room cooling load decreases. In heating mode, the third solenoid valve 13 replenishes the refrigerant in the circulation return loop, meeting the requirements for high-frequency operation of the air conditioner when the room heat load increases. The fourth solenoid valve 14 delivers excess refrigerant in the circulation loop to the receiver 7 through the first pipe 6, meeting the requirements for low-frequency operation of the air conditioner when the indoor heat load decreases or when the outdoor conditions are high.

[0071] In some embodiments, such as Figure 2 As shown, the air conditioner also includes a switching valve 9, which is used to control the flow of refrigerant from the liquid outlet to the first solenoid valve 11 and the third solenoid valve 13.

[0072] It should be noted that the switching valve 9 is a solenoid valve.

[0073] It is understandable that a main flow pipe is connected to the liquid outlet of the liquid reservoir 7, and two branch pipes are connected to the main flow pipe through a three-way valve. The two branch pipes are connected to the first solenoid valve 11 and the third solenoid valve 13 respectively. The switching valve 9 is located on the main flow pipe to control the liquid outlet of the liquid reservoir 7.

[0074] In some embodiments, such as Figure 2As shown, the air conditioner also includes a flow meter 10, which is used to control the flow rate from the switching valve 9 to the first solenoid valve 11 or the third solenoid valve 13.

[0075] It is understandable that a main pipe is connected from the liquid outlet of the liquid reservoir 7, and two branch pipes are connected to the main pipe through a three-way valve. The two branch pipes are connected to the first solenoid valve 11 and the third solenoid valve 13 respectively. The switching valve 9 and the flow meter 10 are both located on the main pipe to control whether the liquid reservoir 7 discharges liquid and the discharge flow rate. The switching valve 9 is connected between the liquid outlet of the liquid reservoir 7 and the flow meter 10.

[0076] In some embodiments, such as Figure 2 As shown, the liquid reservoir 7 is provided with an inlet end, and the pressure pump 8 is connected between the inlet end and the second pipeline 4.

[0077] In some embodiments, such as Figure 4 As shown, the first heat exchanger 1 is installed indoors, the second heat exchanger 3 is installed outdoors, and the liquid storage tank 7 is provided with an inlet end and an outlet end.

[0078] The second solenoid valve 12 is used to transport the refrigerant in the second pipeline 4 to the liquid receiver 7. The third solenoid valve 13 is used to transport part of the refrigerant flowing out of the liquid outlet to the second pipeline 4. The first solenoid valve 11 is used to transport part of the refrigerant flowing out of the liquid outlet to the first pipeline 6. The fourth solenoid valve 14 is used to transport the refrigerant in the first pipeline 6 to the liquid inlet.

[0079] The pressure pump 8 is connected between the second solenoid valve 12 and the inlet end of the liquid reservoir 7. The outlet end of the liquid reservoir 7 is connected in sequence to the switch valve 9 and the flow meter 10.

[0080] It should be noted that the pressure pump 8 is located in the outflow direction of the second solenoid valve 12 and the fourth solenoid valve 14. The switching valve 9 and the flow meter 10 are located in the inflow direction of the first solenoid valve 11 and the inflow direction of the third solenoid valve 13.

[0081] It is understandable that, such as Figure 5 As shown, under cooling conditions, when the room's cooling load increases, if the refrigerant in the circulation loop is insufficient, the pressure pump 8, the on / off valve 9, and the first solenoid valve 11 are opened, while the second solenoid valve 12, the third solenoid valve 13, and the fourth solenoid valve 14 are closed to replenish the refrigerant in the circulation loop. Simultaneously, the refrigerant replenishment amount is regulated by the flow meter 10 to achieve optimal operating conditions.

[0082] like Figure 6As shown, under cooling conditions, if there is too much refrigerant in the circulation loop when the room cooling load decreases, the pressure pump 8 and the second solenoid valve 12 will be turned on, and the switching valve 9, the first solenoid valve 11, the third solenoid valve 13 and the fourth solenoid valve 14 will be turned off, and the excess refrigerant in the circulation loop will be pumped into the liquid receiver 7 for storage.

[0083] like Figure 7 As shown, in heating mode, when the compressor 2 frequency increases or defrosting is required, the pressure pump 8, the switching valve 9, and the third solenoid valve 13 are opened, while the first solenoid valve 11, the second solenoid valve 12, and the fourth solenoid valve 14 are closed, replenishing refrigerant into the circulation loop. Simultaneously, the refrigerant replenishment amount is regulated by the flow meter 10 to achieve optimal operating conditions.

[0084] like Figure 8 As shown, when the room heat load decreases under heating conditions, if there is too much refrigerant in the circulation loop, the pressure pump 8 and the fourth solenoid valve 14 will be turned on, and the switching valve 9, the first solenoid valve 11, the second solenoid valve 12 and the third solenoid valve 13 will be turned off, and the excess refrigerant in the circulation loop will be pumped into the liquid receiver 7 for storage.

[0085] In the above embodiments, the descriptions of each embodiment have different focuses. Parts not described in detail in a particular embodiment can be referred to in the relevant descriptions of other embodiments. In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more features.

[0086] The air conditioner provided in the embodiments of this application has been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An air conditioner, characterized in that, It includes a first heat exchanger (1), a compressor (2), a second heat exchanger (3), a second pipeline (4), an electronic expansion valve (5), and a first pipeline (6) connected in sequence. The first pipeline (6) is connected between the electronic expansion valve (5) and the first heat exchanger (1). The air conditioner also includes a liquid receiver (7), a first solenoid valve (11), and a pressure pump (8). The first solenoid valve (11) is used to control the refrigerant flow from the liquid receiver (7) to the first pipeline (6), and the pressure pump (8) is used to pressurize the liquid receiver (7).

2. The air conditioner according to claim 1, characterized in that, It also includes a second solenoid valve (12), which is used to control the flow of refrigerant from the second pipeline (4) to the reservoir (7).

3. The air conditioner according to claim 2, characterized in that, The first heat exchanger (1) is installed indoors, the second heat exchanger (3) is installed outdoors, the first solenoid valve (11) is used to control the flow of refrigerant in the reservoir (7) to the first pipeline (6), and the second solenoid valve (12) is used to transport the refrigerant in the second pipeline (4) to the reservoir (7).

4. The air conditioner according to claim 1, characterized in that, The first heat exchanger (1) is installed indoors, and the second heat exchanger (3) is installed outdoors; It also includes a third solenoid valve (13), the liquid reservoir (7) is provided with a liquid outlet, the first solenoid valve (11) is used to transport part of the refrigerant flowing out of the liquid outlet to the first pipeline (6), and the third solenoid valve (13) is used to transport part of the refrigerant flowing out of the liquid outlet to the second pipeline (4).

5. The air conditioner according to claim 1, characterized in that, The first heat exchanger (1) is installed indoors, and the second heat exchanger (3) is installed outdoors; It also includes a fourth solenoid valve (14). The liquid reservoir (7) is provided with an inlet end and an outlet end. The first solenoid valve (11) is connected between the outlet end and the first pipeline (6). The fourth solenoid valve (14) is connected between the inlet end and the first pipeline (6).

6. The air conditioner according to claim 1, characterized in that, It also includes a second solenoid valve (12) and a third solenoid valve (13). The liquid reservoir (7) is provided with an inlet end and an outlet end. The second solenoid valve (12) is used to transport the refrigerant in the second pipeline (4) to the liquid reservoir (7). The third solenoid valve (13) is used to transport part of the refrigerant flowing out of the outlet end to the second pipeline (4). The first solenoid valve (11) is used to transport part of the refrigerant flowing out of the outlet end to the first pipeline (6).

7. The air conditioner according to claim 6, characterized in that, The first heat exchanger (1) is installed indoors, and the second heat exchanger (3) is installed outdoors; It also includes a fourth solenoid valve (14), which is used to deliver the refrigerant in the first pipeline (6) to the liquid inlet.

8. The air conditioner according to claim 6, characterized in that, It also includes a switching valve (9), which is used to control the flow of refrigerant from the liquid outlet to the first solenoid valve (11) and the third solenoid valve (13).

9. The air conditioner according to claim 8, characterized in that, It also includes a flow meter (10) for controlling the flow rate of the switching valve (9) to the first solenoid valve (11) or the third solenoid valve (13).

10. The air conditioner according to claim 7, characterized in that, The liquid reservoir (7) is provided with a liquid inlet, and the pressure pump (8) is connected between the liquid inlet and the second pipeline (4).

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