Air conditioning system and air conditioning equipment

Abstract

The utility model relates to the technical field of air conditioning, and provides an air conditioning system and air conditioning equipment, the system comprises a compressor, an outdoor heat exchange assembly and a bypass branch, the outdoor heat exchange assembly comprises a first outdoor heat exchange branch pipe, a second outdoor heat exchange branch pipe and a control valve group, the first end of the first outdoor heat exchange branch pipe is connected to the first end of the second outdoor heat exchange branch pipe through a first throttling component. When the control valve set is located at the defrosting working position, one of the first outdoor heat exchange branch pipe and the second outdoor heat exchange branch pipe serves as an evaporator, and the other serves as a condenser, so that the indoor unit can still continuously supply heat to the indoor space in the defrosting process, and the indoor temperature is kept stable; by arranging the bypass branch between the exhaust side of the compressor and the outdoor heat exchange assembly, part of the refrigerant can directly enter the outdoor heat exchange assembly without passing through the indoor heat exchanger, so that the temperature of the refrigerant entering the first outdoor heat exchange branch pipe or the second outdoor heat exchange branch pipe is increased, and the defrosting speed is increased.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, and in particular to an air conditioning system and air conditioning equipment. Background Technology

[0002] Air conditioning systems typically have both heating and cooling functions. When a heat pump system is operating in heating mode, the outdoor heat exchanger acts as an evaporator, which operates at a lower temperature. When the temperature of the outdoor heat exchanger coil is lower than the dew point temperature of the outdoor air and below 0°C, water vapor in the air will condense on the coil, causing frost. The frost layer increases the thermal resistance of the outdoor heat exchanger and the resistance of the fan, thus severely affecting the heat exchange effect. Therefore, air conditioning systems need to be defrosted regularly.

[0003] The current defrosting method of air conditioners is a four-way valve reversal, which changes the system from heating cycle to cooling cycle. At this time, the outdoor unit heat exchanger becomes a condenser. The high-temperature gas compressed by the compressor enters the outdoor heat exchanger and uses the high-temperature and high-pressure gas to quickly melt the frost layer on the surface of the outdoor heat exchanger. However, at this time, the indoor heat exchanger is an evaporator, which will absorb heat from the indoor environment, causing fluctuations in the indoor temperature and affecting the comfort of the indoor environment. Utility Model Content

[0004] This utility model provides an air conditioning system and air conditioning equipment to solve the defect in the prior art where the indoor ambient temperature fluctuates during the defrosting process, resulting in poor indoor comfort. During the defrosting process, the indoor unit can still continuously supply heat to the room, maintain a stable indoor temperature, and improve the comfort of users during the defrosting stage.

[0005] This utility model provides an air conditioning system, including:

[0006] compressor;

[0007] An indoor heat exchanger is connected to the compressor;

[0008] An outdoor heat exchange assembly includes a first outdoor heat exchange branch pipe, a second outdoor heat exchange branch pipe, and a control valve assembly. The first end of the first outdoor heat exchange branch pipe is connected to the first end of the second outdoor heat exchange branch pipe via a first throttling component. The control valve assembly is connected to the second end of the first outdoor heat exchange branch pipe, the second end of the second outdoor heat exchange branch pipe, the indoor heat exchanger, and the compressor, respectively. The control valve assembly has a defrost operating position, in which one of the first and second outdoor heat exchange branch pipes functions as an evaporator, and the other functions as a condenser.

[0009] A bypass branch, the first end of which is connected to the exhaust side of the compressor, and the second end of which is connected between the outdoor heat exchange component and the indoor heat exchanger, and the bypass branch is equipped with a bypass control valve.

[0010] According to the present invention, an air conditioning system further includes a four-way valve, which is connected to the compressor, the indoor heat exchanger, and the outdoor heat exchange assembly respectively; the first end of the bypass branch is connected between the compressor and the four-way valve or between the four-way valve and the indoor heat exchanger.

[0011] According to the present invention, an air conditioning system is provided in which a gas pipe shut-off valve is provided between the four-way valve and the indoor heat exchanger.

[0012] According to the present invention, in an air conditioning system, the first end of the bypass branch is connected between the gas pipe shut-off valve and the indoor heat exchanger.

[0013] According to the present invention, an air conditioning system is provided in which the indoor heat exchanger is equipped with a heating element.

[0014] According to the present invention, an air conditioning system is provided in which the indoor heat exchanger is equipped with an indoor fan.

[0015] According to the present invention, an air conditioning system includes a control valve assembly comprising:

[0016] A first control component is provided, wherein the second end of the first outdoor heat exchange branch pipe is connected to the compressor and the indoor heat exchanger respectively through the first control component. The first control component has a first state and a second state. In the first state, the second end of the first outdoor heat exchange branch pipe is connected to the compressor. In the second state, the second end of the first outdoor heat exchange branch pipe is connected to the indoor heat exchanger.

[0017] The second control component connects the second end of the second outdoor heat exchange branch pipe to the compressor and the indoor heat exchanger respectively. The second control component has a third state and a fourth state. In the third state, the second end of the second outdoor heat exchange branch pipe is connected to the compressor. In the fourth state, the second end of the second outdoor heat exchange branch pipe is connected to the indoor heat exchanger.

[0018] In the defrosting working position, the first control component is in a first state and the second control component is in a fourth state; or the first control component is in a second state and the second control component is in a third state.

[0019] According to the present invention, an air conditioning system is provided in which an electronic expansion valve is provided on the side of the indoor heat exchanger away from the compressor.

[0020] According to the present invention, an air conditioning system is provided in which a temperature sensor is provided on the first outdoor heat exchange branch pipe and / or the second outdoor heat exchange branch pipe.

[0021] This utility model also provides an air conditioning device, including any one of the air conditioning systems described above.

[0022] The air conditioning system provided by this utility model divides the outdoor heat exchange component into a first outdoor heat exchange branch pipe and a second outdoor heat exchange branch pipe. During the defrosting operation of the system, one of the first and second outdoor heat exchange branch pipes is used as a condenser, and the other is used as an evaporator. This allows the indoor unit to continue supplying heat to the room during the defrosting process, thereby maintaining a stable indoor temperature and significantly improving user comfort during the defrosting phase. Furthermore, through a bypass branch, some high-pressure, high-temperature refrigerant can directly enter the inlet of the outdoor heat exchange component without passing through the indoor heat exchanger, thereby increasing the refrigerant temperature entering the first or second outdoor heat exchange branch pipe and thus improving the defrosting speed. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in this utility model 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a structural schematic diagram of the air conditioning system provided by this utility model.

[0025] Figure 2 This is a system circulation diagram of the heating operation of the air conditioning system provided by this utility model.

[0026] Figure 3 This is one of the system cycle diagrams for the defrosting operation of the air conditioning system provided by this utility model.

[0027] Figure 4 This is the second system cycle diagram of the defrosting operation of the air conditioning system provided by this utility model.

[0028] 100. Compressor;

[0029] 200. Indoor heat exchanger; 210. Indoor fan; 220. Heating element;

[0030] 300. Outdoor heat exchanger; 310. First outdoor heat exchange branch pipe; 320. Second outdoor heat exchange branch pipe; 330. First throttling component; 331. First throttling element; 332. Fifth control valve;

[0031] 400, Control valve assembly; 410, First control component; 411, First control valve; 412, Second control valve; 420, Second control component; 421, Third control valve; 422, Fourth control valve;

[0032] 510. Sixth control valve; 520. Second throttling element;

[0033] 600, Four-way valve;

[0034] 710. Gas pipe shut-off valve; 720. Liquid pipe shut-off valve;

[0035] 810. Bypass branch; 820. Bypass control valve;

[0036] 900. Gas-liquid separator. Detailed Implementation

[0037] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0038] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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 or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0040] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] The following is combined Figures 1-4 This invention describes the air conditioning system of the present invention.

[0043] An embodiment of this utility model proposes an air conditioning system, such as... Figure 1 As shown, the air conditioning system includes a connected compressor 100, an indoor heat exchanger 200, and an outdoor heat exchange component, forming a refrigerant circulation loop.

[0044] The indoor heat exchanger 200 is connected to the compressor 100; the outdoor heat exchange assembly includes an outdoor heat exchanger 300 and a control valve assembly 400. The outdoor heat exchanger 300 includes a first outdoor heat exchange branch pipe 310 and a second outdoor heat exchange branch pipe 320. The first end of the first outdoor heat exchange branch pipe 310 is connected to the first end of the second outdoor heat exchange branch pipe 320 through a first throttling component 330; the control valve assembly 400 is connected to the indoor heat exchanger 200, the compressor 100, the second end of the first outdoor heat exchange branch pipe 310, and the second end of the second outdoor heat exchange branch pipe 320, respectively.

[0045] The control valve assembly 400 has a defrost working position. In the defrost working position, one of the second ends of the first outdoor heat exchange branch pipe 310 and the second end of the second outdoor heat exchange branch pipe 320 is connected to the indoor heat exchanger 200 through the control valve assembly 400, and the other of the second ends of the first outdoor heat exchange branch pipe 310 and the second end of the second outdoor heat exchange branch pipe 320 is connected to the compressor 100 through the control valve assembly 400.

[0046] Specifically, during defrosting operation of the first outdoor heat exchange branch pipe 310, the second end of the first outdoor heat exchange branch pipe 310 is connected to the indoor heat exchanger 200 through the control valve group 400, and the second end of the second outdoor heat exchange branch pipe 320 is connected to the compressor 100 through the control valve group 400. At this time, the indoor heat exchanger 200 and the first outdoor heat exchange branch pipe 310 together form a condenser. The high-temperature and high-pressure refrigerant flowing out of the indoor heat exchanger 200 flows into the first outdoor heat exchange branch pipe 310 for defrosting. The refrigerant flowing out of the first outdoor heat exchange branch pipe 310 is throttled by the first throttling component 330, exchanges heat with the environment through the second outdoor heat exchange branch pipe 320, and finally flows back to the compressor 100, completing a heating refrigerant circulation loop.

[0047] During defrosting operation of the second outdoor heat exchange branch pipe 320, the second end of the second outdoor heat exchange branch pipe 320 is connected to the indoor heat exchanger 200 through the control valve group 400, and the second end of the first outdoor heat exchange branch pipe 310 is connected to the compressor 100 through the control valve group 400. At this time, the indoor heat exchanger 200 and the second outdoor heat exchange branch pipe 320 together form a condenser. The high-temperature and high-pressure refrigerant flowing out of the indoor heat exchanger 200 flows into the second outdoor heat exchange branch pipe 320 for defrosting. The refrigerant flowing out of the second outdoor heat exchange branch pipe 320 is throttled by the first throttling component 330, exchanges heat with the environment through the first outdoor heat exchange branch pipe 310, and finally flows back to the compressor 100, completing a heating refrigerant circulation loop. Thus, the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 can be defrosted sequentially through the control valve group 400.

[0048] Understandably, the outdoor heat exchanger adopts a segmented design, consisting of a first outdoor heat exchange branch pipe 310 and a second outdoor heat exchange branch pipe 320 (equivalent to two heat exchangers). During defrosting operation of the air conditioning system, one of the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 acts as a condenser, while the other acts as an evaporator, and the indoor heat exchanger 200 acts as a condenser. Thus, during the defrosting process, independent defrosting of the two heat exchangers can be achieved, ensuring that the indoor heat exchanger 200 can continue to operate during the defrosting process to continuously supply heat to the room, maintain a stable indoor temperature, and significantly improve user comfort during the defrosting phase.

[0049] The air conditioning system also includes a bypass branch 810, the first end of which is connected to the exhaust side of the compressor 100, and the second end of which is connected between the outdoor heat exchange component and the indoor heat exchanger 200. The bypass branch 810 is equipped with a bypass control valve 820.

[0050] Understandably, one end of the bypass branch 810 is connected to the discharge side of the compressor 100, and the other end is connected to the pipeline between the outdoor heat exchange component and the indoor heat exchanger 200. A bypass control valve 820 is installed on this bypass branch 810 to regulate or control the flow path of the refrigerant. Specifically, by opening the bypass control valve 820, some high-pressure, high-temperature refrigerant can bypass the indoor heat exchanger 200 and directly enter the inlet end of the outdoor heat exchange component, mixing with the refrigerant flowing out of the indoor heat exchanger 200. This can increase the temperature of the refrigerant entering the first outdoor heat exchange branch 310 or the second outdoor heat exchange branch 320, thereby accelerating the defrosting speed.

[0051] The air conditioning system provided in this embodiment of the utility model divides the outdoor heat exchanger into a first outdoor heat exchange branch pipe 310 and a second outdoor heat exchange branch pipe 320. During the defrosting operation of the system, one of the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 is used as a condenser, and the other of the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 is used as an evaporator. This allows the indoor unit to continue supplying heat to the room during the defrosting process, thereby maintaining a stable indoor temperature and significantly improving the user's comfort during the defrosting stage. Furthermore, through the bypass branch 810, some high-pressure and high-temperature refrigerant can directly enter the inlet end of the outdoor heat exchange component without passing through the indoor heat exchanger 200, thereby increasing the temperature of the refrigerant entering the first outdoor heat exchange branch pipe 310 or the second outdoor heat exchange branch pipe 320 and thus improving the defrosting speed.

[0052] In one embodiment of this utility model, the control valve assembly 400 includes a first control component 410. The second end of the first outdoor heat exchange branch pipe 310 is connected to the compressor 100 and the indoor heat exchanger 200 respectively through the first control component 410. The first control component 410 has a first state and a second state. In the first state, the second end of the first outdoor heat exchange branch pipe 310 is connected to the compressor 100. In the second state, the second end of the first outdoor heat exchange branch pipe 310 is connected to the indoor heat exchanger 200. By switching between the first state and the second state, the connection path of the first outdoor heat exchange branch pipe 310 can be changed, so that it can selectively connect to the compressor 100 or the indoor heat exchanger 200 according to the system requirements.

[0053] In this embodiment, the first control component 410 includes a first control valve 411 and a second control valve 412. The first control valve 411 is connected between the second end of the first outdoor heat exchange branch pipe 310 and the compressor 100; the second control valve 412 is connected between the second end of the first outdoor heat exchange branch pipe 310 and the indoor heat exchanger 200.

[0054] It is understood that in the first state, the first control component 410 is in the first state, with the first control valve 411 open and the second control valve 412 closed; in the second state, the first control component 410 is in the second state, with the first control valve 411 closed and the second control valve 412 open.

[0055] In one embodiment of this utility model, the control valve assembly 400 further includes a second control component 420. The second end of the second outdoor heat exchange branch pipe 320 is connected to the compressor 100 and the indoor heat exchanger 200 respectively through the second control component 420. The second control component 420 has a third state and a fourth state. In the third state, the second end of the second outdoor heat exchange branch pipe 320 is connected to the compressor 100. In the fourth state, the second end of the second outdoor heat exchange branch pipe 320 is connected to the indoor heat exchanger 200. By switching between the third state and the fourth state, the connection path of the second outdoor heat exchange branch pipe 320 can be changed, so that it can selectively connect to the compressor 100 or the indoor heat exchanger 200 according to the system requirements.

[0056] Understandably, when the air conditioning system is defrosting, the control valve assembly 400 is in the defrosting working position, the first control component 410 is in the first state, and the second control component 420 is in the fourth state, so as to defrost the second outdoor heat exchange branch pipe 320; or the first control component 410 is in the second state, and the second control component 420 is in the third state, so as to defrost the first outdoor heat exchange branch pipe 310.

[0057] In this embodiment, the second control component 420 includes a third control valve 421 and a fourth control valve 422. The third control valve 421 is connected between the second end of the second outdoor heat exchange branch pipe 320 and the compressor 100; the fourth control valve 422 is connected between the second end of the second outdoor heat exchange branch pipe 320 and the indoor heat exchanger 200.

[0058] In one state, the second control component 420 is in the third state, with the third control valve 421 open and the fourth control valve 422 closed; in another state, the second control component 420 is in the fourth state, with the third control valve 421 closed and the fourth control valve 422 open.

[0059] Understandably, when the first outdoor heat exchange branch pipe 310 is defrosting, the third control valve 421 and the second control valve 412 are open, while the fourth control valve 422 and the first control valve 411 are closed. When the second outdoor heat exchange branch pipe 320 is defrosting, the fourth control valve 422 and the first control valve 411 are open, while the third control valve 421 and the second control valve 412 are closed. Thus, by controlling the states of the fourth control valve 422, the first control valve 411, the third control valve 421, and the second control valve 412, the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 are defrosted sequentially.

[0060] In this embodiment, the first control valve 411, the second control valve 412, the third control valve 421, and the fourth control valve 422 are solenoid valves.

[0061] It should be noted that traditional air conditioning systems require switching the refrigerant flow direction via a four-way valve 600 during defrosting. This mechanical switching action generates noise, which is particularly noticeable in quiet environments and affects the user experience. In this embodiment, however, the smooth switching of refrigerant flow direction is achieved through stepless adjustment of the control valve assembly 400, avoiding the impact noise generated by the mechanical switching of the traditional four-way valve 600.

[0062] In one embodiment of the present invention, the first throttling component 330 includes a first throttling element 331 and a fifth control valve 332. The first throttling element 331 is connected between the first end of the first outdoor heat exchange branch pipe 310 and the first end of the second outdoor heat exchange branch pipe 320; the fifth control valve 332 is connected between the first end of the first outdoor heat exchange branch pipe 310 and the first end of the second outdoor heat exchange branch pipe 320.

[0063] In this embodiment, the first throttling element 331 is a capillary tube, and the fifth control valve 332 is a solenoid valve.

[0064] It is understood that the first throttling element 331 and the fifth control valve 332 are connected in parallel between the first end of the first outdoor heat exchange branch pipe 310 and the first end of the second outdoor heat exchange branch pipe 320; when the control valve group 400 is in the defrosting working position, the fifth control valve 332 is closed.

[0065] It should be noted that when the air conditioning system is in heating mode, the fifth control valve 332 is opened, and the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 form an outdoor heat exchanger 300, which undertakes the function of exchanging heat with the outside.

[0066] In one embodiment of the present invention, a second throttling component is provided between the control valve assembly 400 and the indoor heat exchanger 200. The second throttling component includes a sixth control valve 510 and a second throttling element 520, which are connected in parallel between the control valve assembly 400 and the indoor heat exchanger 200.

[0067] The second throttling device 520 is an electronic expansion valve, and the sixth control valve 510 is a solenoid valve.

[0068] Understandably, when the control valve assembly 400 is in the defrost position, the sixth control valve 510 is open and the second throttling element 520 is closed; when the air conditioning system is in heating mode, the sixth control valve 510 is closed and the second throttling element 520 is open.

[0069] In one embodiment of the present invention, the air conditioning system further includes a four-way valve, which is connected to the compressor, the indoor heat exchanger, and the outdoor heat exchange component respectively; the first end of the bypass branch is connected between the compressor and the four-way valve or between the four-way valve and the indoor heat exchanger.

[0070] Specifically, the four-way valve 600 includes a C port, an E port, a D port, and an S port. The D port is connected to the exhaust port of the compressor 100, the E port is connected to the indoor heat exchanger 200, the first control valve 411 and the third control valve 421 are connected to the C port, and the S port is connected to the suction port of the compressor 100 through the gas-liquid separator 900.

[0071] The first end of the bypass branch 810 can be connected between the compressor 100 and the four-way valve 600. Of course, the first end of the bypass branch 810 can also be connected between the four-way valve 600 and the indoor heat exchanger 200. The second end of the bypass branch 810 is connected between the outdoor heat exchange component and the second throttling component.

[0072] In one embodiment of this utility model, a gas pipe shut-off valve 710 is provided between the four-way valve 600 and the indoor heat exchanger 200.

[0073] Specifically, a gas pipe shut-off valve 710 is provided between the E port of the four-way valve 600 and the indoor heat exchanger 200. Furthermore, the first end of the bypass branch 810 is connected between the gas pipe shut-off valve 710 and the indoor heat exchanger 200.

[0074] In one embodiment of this utility model, an electronic expansion valve is provided on the side of the indoor heat exchanger 200 away from the compressor 100. Furthermore, the compressor 100 is a variable frequency compressor; there are two indoor heat exchangers 200, which are connected in parallel and then connected to the second throttling component through a liquid pipe shut-off valve 720.

[0075] In one embodiment of the present invention, the indoor heat exchanger 200 is provided with an indoor fan 210.

[0076] It is understandable that during the defrosting process of the first outdoor heat exchange branch pipe 310 or the second outdoor heat exchange branch pipe 320, the indoor fan 210 should be controlled to reduce its speed appropriately.

[0077] Optionally, the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 are each equipped with a corresponding outdoor fan. During the defrosting process of the first outdoor heat exchange branch pipe 310, the indoor fan 210 can be controlled to reduce its speed appropriately, or the outdoor fan of the first outdoor heat exchange branch pipe 310 can be controlled to stop, or the indoor fan 210 can be controlled to reduce its speed and the outdoor fan of the first outdoor heat exchange branch pipe 310 can be controlled to stop; during the defrosting process of the second outdoor heat exchange branch pipe 320, the indoor fan 210 can be controlled to reduce its speed appropriately, or the outdoor fan of the second outdoor heat exchange branch pipe 320 can be controlled to stop, or the indoor fan 210 can be controlled to reduce its speed and the outdoor fan of the second outdoor heat exchange branch pipe 320 can be controlled to stop.

[0078] Furthermore, the indoor heat exchanger 200 is equipped with a heating element 220, which is turned on when the speed of the indoor fan 210 is reduced.

[0079] Understandably, in an air conditioning system, the indoor heat exchanger 200 is equipped with a heating element 220 to assist in raising the indoor air temperature. When the control system detects that the indoor fan 210 needs to be reduced in speed, such as during low-load operation or when the ambient temperature is low, the system will automatically activate the heating element 220 to prevent the cold air from affecting comfort. The heating element 220 provides additional heat compensation when the fan is running at low speed, ensuring that the supply air temperature is maintained within a suitable range, thereby improving the user experience.

[0080] In one embodiment of this utility model, a temperature sensor (not shown in the figure) is provided on the first outdoor heat exchange branch pipe 310, and the temperature sensor measures the frosting parameters of the first outdoor heat exchange branch pipe 310.

[0081] Understandably, when the air conditioning system is in heating mode, the temperature sensor measures the coil temperature of the first outdoor heat exchange branch pipe 310. If the coil temperature meets the defrosting conditions, the control valve assembly 400 is put into the defrosting position to defrost the first outdoor heat exchange branch pipe 310. Of course, a temperature sensor can also be installed on the second outdoor heat exchange branch pipe 320, or both the first and second outdoor heat exchange branch pipes 310 and 320 can be equipped with temperature sensors.

[0082] A temperature sensor is installed on the first outdoor heat exchange branch pipe 310 of the air conditioning system. This temperature sensor is used to monitor the surface temperature or other relevant parameters of this section of the pipe in real time to determine whether frost has occurred. By detecting frost parameters, the system can accurately grasp the operating status of the outdoor heat exchanger 300 and trigger defrosting operation or adjust the operating mode accordingly, thereby ensuring the normal operating efficiency and heat exchange effect of the system.

[0083] In one specific embodiment of this utility model, the working process of the air conditioning system is as follows:

[0084] like Figure 2 As shown, during heating operation, the sixth control valve 510, the fourth control valve 422 and the first control valve 411 are in the closed state, while the fifth control valve 332, the third control valve 421 and the second control valve 412 are in the open state. At this time, the two outdoor heat exchange branch pipes are connected in series to form an outdoor heat exchanger 300, which undertakes the task of exchanging heat with the outside.

[0085] like Figure 3 As shown, when the first outdoor heat exchange branch pipe 310 is defrosting, the sixth control valve 510, the third control valve 421 and the second control valve 412 are in the open state, and the fifth control valve 332, the fourth control valve 422 and the first control valve 411 are in the closed state. At this time, the indoor heat exchanger 200 and the first outdoor heat exchange branch pipe 310 together form a condenser. The high-temperature and high-pressure refrigerant flowing out of the indoor heat exchanger 200 flows directly into the first outdoor heat exchange branch pipe 310 for defrosting. After the refrigerant is throttled through the capillary tube, it passes through the second outdoor heat exchange branch pipe 320 to complete the heat exchange with the environment, and finally flows into the compressor 100 through the C port of the four-way valve 600 to complete a heating refrigerant circulation loop.

[0086] Furthermore, the bypass control valve 820 opens, and the compressor outputs high-temperature and high-pressure refrigerant. Part of the refrigerant enters the indoor heat exchanger 200, and the other part enters the bypass branch 810. The refrigerant flowing out of the indoor heat exchanger 200 mixes with the refrigerant flowing out of the bypass branch 810, which can increase the temperature of the refrigerant flowing into the outdoor heat exchange component, thereby accelerating the defrosting speed. The mixed refrigerant flows into the first outdoor heat exchange branch 310 for defrosting. After being throttled through the capillary tube, the refrigerant passes through the second outdoor heat exchange branch 320 to complete heat exchange with the environment. Finally, it flows into the compressor 100 through the C port of the four-way valve 600, completing a heating refrigerant circulation loop.

[0087] like Figure 4As shown, during defrosting operation of the second outdoor heat exchange branch pipe 320, the sixth control valve 510, the fourth control valve 422, and the first control valve 411 are open, while the fifth control valve 332, the third control valve 421, and the second control valve 412 are closed. At this time, the indoor heat exchanger 200 and the second outdoor heat exchange branch pipe 320 together form a condenser. The high-temperature, high-pressure refrigerant flowing from the indoor heat exchanger 200 flows directly into the second outdoor heat exchange branch pipe 320 for defrosting. After being throttled through a capillary tube, the refrigerant passes through the first outdoor heat exchange branch pipe 310 to exchange heat with the environment, and finally flows into the compressor 100 through port C of the four-way valve 600, completing a heating refrigerant circulation loop. It should be noted that... Figures 2 to 4 The arrows in the diagram indicate the direction of refrigerant flow.

[0088] Furthermore, the bypass control valve 820 opens, and the compressor outputs high-temperature and high-pressure refrigerant. Part of the refrigerant enters the indoor heat exchanger 200, and the other part enters the bypass branch 810. The refrigerant flowing out of the indoor heat exchanger 200 mixes with the refrigerant flowing out of the bypass branch 810, which can increase the temperature of the refrigerant flowing into the outdoor heat exchange component, thereby accelerating the defrosting speed. The mixed refrigerant flows directly into the second outdoor heat exchange branch 320 for defrosting. After being throttled by the capillary tube, the refrigerant passes through the first outdoor heat exchange branch 310 to complete the heat exchange with the environment, and finally flows into the compressor 100 through the C port of the four-way valve 600, completing a heating refrigerant circulation loop.

[0089] Based on the air conditioning system provided in any of the above embodiments, this utility model proposes a control method for the air conditioning system, which includes the following steps:

[0090] Step 10: Respond to the defrost command to run defrost mode.

[0091] Step 20: Based on the defrost command, control valve group 400 is controlled to enter the defrost working position.

[0092] The control valve assembly 400 has a defrost working position. In the defrost working position, one of the second ends of the first outdoor heat exchange branch pipe 310 and the second end of the second outdoor heat exchange branch pipe 320 is connected to the indoor heat exchanger 200 through the control valve assembly 400, and the other of the second ends of the first outdoor heat exchange branch pipe 310 and the second end of the second outdoor heat exchange branch pipe 320 is connected to the compressor 100 through the control valve assembly 400.

[0093] Understandably, when the air conditioning system detects the need for defrosting, the control unit will immediately respond to the defrosting command and start the defrosting program, so that one of the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 acts as the condenser, the other of the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 acts as the evaporator, and the indoor heat exchanger 200 acts as the condenser; thus, during the defrosting process, the two heat exchangers can be defrosted independently, ensuring that the indoor heat exchanger 200 can continue to operate during the defrosting process to continuously supply heat to the room, maintain a stable indoor temperature, and significantly improve the user's comfort during the defrosting stage.

[0094] Optionally, step 20 may specifically include the following steps:

[0095] Step 21: Control the control valve group 400 to enter the first defrost position. In the first defrost position, the second end of the first outdoor heat exchange branch pipe 310 is connected to the indoor heat exchanger 200, and the second end of the second outdoor heat exchange branch pipe 320 is connected to the compressor 100.

[0096] Step 22: Control the control valve group 400 to enter the second defrost position. In the second defrost position, the second end of the second outdoor heat exchange branch pipe 320 is connected to the indoor heat exchanger 200, and the second end of the first outdoor heat exchange branch pipe 310 is connected to the compressor 100.

[0097] Understandably, based on the defrost command, the control valve assembly 400 is controlled to enter the first defrost position and / or the second defrost position.

[0098] In the first defrost position, the first outdoor heat exchange branch pipe 310 is defrosted. The second end of the first outdoor heat exchange branch pipe 310 is connected to the indoor heat exchanger 200 through the control valve group 400, and the second end of the second outdoor heat exchange branch pipe 320 is connected to the compressor 100 through the control valve group 400. At this time, the indoor heat exchanger 200 and the first outdoor heat exchange branch pipe 310 together form a condenser. The high-temperature and high-pressure refrigerant flowing out of the indoor heat exchanger 200 flows into the first outdoor heat exchange branch pipe 310 for defrosting. The refrigerant flowing out of the first outdoor heat exchange branch pipe 310 is throttled by the first throttling component 330, and then exchanges heat with the environment through the second outdoor heat exchange branch pipe 320, and finally flows back to the compressor 100 to complete a heating refrigerant circulation loop.

[0099] In the second defrost position, the second outdoor heat exchange branch pipe 320 is defrosted. The second end of the second outdoor heat exchange branch pipe 320 is connected to the indoor heat exchanger 200 through the control valve group 400, and the second end of the first outdoor heat exchange branch pipe 310 is connected to the compressor 100 through the control valve group 400. At this time, the indoor heat exchanger 200 and the second outdoor heat exchange branch pipe 320 together form a condenser. The high-temperature and high-pressure refrigerant flowing out of the indoor heat exchanger 200 flows into the second outdoor heat exchange branch pipe 320 for defrosting. The refrigerant flowing out of the second outdoor heat exchange branch pipe 320 is throttled by the first throttling component 330, exchanges heat with the environment through the first outdoor heat exchange branch pipe 310, and finally flows back to the compressor 100, completing a heating refrigerant circulation loop. Thus, the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 can be defrosted sequentially through the control valve group 400.

[0100] Optionally, the control method includes the following:

[0101] Reduce the speed of the indoor fan 210 and / or shut down the target outdoor fan.

[0102] The indoor heat exchanger 200 is equipped with an indoor fan 210, and the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 are respectively equipped with outdoor fans. The target outdoor fan is the outdoor fan corresponding to the first outdoor heat exchange branch pipe 310 or the second outdoor heat exchange branch pipe 320 that is connected to the indoor heat exchanger 200.

[0103] Understandably, during the defrosting process of the first outdoor heat exchange branch pipe 310, the indoor fan 210 can be controlled to reduce its speed appropriately, or the outdoor fan of the first outdoor heat exchange branch pipe 310 can be controlled to stop, or the indoor fan 210 can be controlled to reduce its speed and the outdoor fan of the first outdoor heat exchange branch pipe 310 can be controlled to stop; during the defrosting process of the second outdoor heat exchange branch pipe 320, the indoor fan 210 can be controlled to reduce its speed appropriately, or the outdoor fan of the second outdoor heat exchange branch pipe 320 can be controlled to stop, or the indoor fan 210 can be controlled to reduce its speed and the outdoor fan of the second outdoor heat exchange branch pipe 320 can be controlled to stop.

[0104] The air conditioning system control method provided in this embodiment divides the outdoor heat exchanger 300 into a first outdoor heat exchange branch pipe 310 and a second outdoor heat exchange branch pipe 320. During system defrosting operation, one of the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 is used as a condenser, and the other of the first outdoor heat exchange branch pipe 310 and the second outdoor heat exchange branch pipe 320 is used as an evaporator. This allows the indoor unit to continue supplying heat to the room during the defrosting process, thereby maintaining a stable indoor temperature and significantly improving user comfort during the defrosting phase.

[0105] This utility model also proposes an air conditioning device, which includes the air conditioning system of any of the above embodiments.

[0106] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An air conditioning system, characterized in that, include: compressor; An indoor heat exchanger is connected to the compressor; An outdoor heat exchange assembly includes a first outdoor heat exchange branch pipe, a second outdoor heat exchange branch pipe, and a control valve assembly. The first end of the first outdoor heat exchange branch pipe is connected to the first end of the second outdoor heat exchange branch pipe via a first throttling component. The control valve assembly is connected to the second end of the first outdoor heat exchange branch pipe, the second end of the second outdoor heat exchange branch pipe, the indoor heat exchanger, and the compressor, respectively. The control valve assembly has a defrost operating position, in which one of the first and second outdoor heat exchange branch pipes functions as an evaporator, and the other functions as a condenser. A bypass branch, the first end of which is connected to the exhaust side of the compressor, and the second end of which is connected between the outdoor heat exchange component and the indoor heat exchanger, and the bypass branch is equipped with a bypass control valve.

2. The air conditioning system according to claim 1, characterized in that, The air conditioning system also includes a four-way valve, which is connected to the compressor, the indoor heat exchanger, and the outdoor heat exchange assembly respectively; the first end of the bypass branch is connected between the compressor and the four-way valve or between the four-way valve and the indoor heat exchanger.

3. The air conditioning system according to claim 2, characterized in that, A gas pipe shut-off valve is provided between the four-way valve and the indoor heat exchanger.

4. The air conditioning system according to claim 3, characterized in that, The first end of the bypass branch is connected between the gas pipe shut-off valve and the indoor heat exchanger.

5. The air conditioning system according to claim 1, characterized in that, The indoor heat exchanger is equipped with a heating element.

6. The air conditioning system according to claim 1, characterized in that, The indoor heat exchanger is equipped with an indoor fan.

7. The air conditioning system according to any one of claims 1 to 6, characterized in that, The control valve assembly includes: A first control component is provided, wherein the second end of the first outdoor heat exchange branch pipe is connected to the compressor and the indoor heat exchanger respectively through the first control component. The first control component has a first state and a second state. In the first state, the second end of the first outdoor heat exchange branch pipe is connected to the compressor. In the second state, the second end of the first outdoor heat exchange branch pipe is connected to the indoor heat exchanger. The second control component connects the second end of the second outdoor heat exchange branch pipe to the compressor and the indoor heat exchanger respectively. The second control component has a third state and a fourth state. In the third state, the second end of the second outdoor heat exchange branch pipe is connected to the compressor. In the fourth state, the second end of the second outdoor heat exchange branch pipe is connected to the indoor heat exchanger. In the defrosting working position, the first control component is in a first state and the second control component is in a fourth state; or the first control component is in a second state and the second control component is in a third state.

8. The air conditioning system according to claim 7, characterized in that, An electronic expansion valve is provided on the side of the indoor heat exchanger away from the compressor.

9. The air conditioning system according to claim 7, characterized in that, Temperature sensors are installed on the first outdoor heat exchange branch pipe and / or the second outdoor heat exchange branch pipe.

10. An air conditioning device, characterized in that, Includes the air conditioning system as described in any one of claims 1 to 9.

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