Air conditioning system

Abstract

The utility model relates to the technical field of air-conditioning systems, and discloses an air-conditioning system which comprises a heat exchange loop comprising a compressor, a four-way valve, an outdoor heat exchanger, a throttling device and an indoor heat exchanger which are communicated through a heat exchange pipeline, and the indoor heat exchanger comprises a plurality of communicated sub heat exchangers and an electronic expansion valve; a first port of the flow path switching assembly communicates with the four-way valve, a second port of the flow path switching assembly communicates with the throttling device, a refrigerant outlet communicates with the inlet end of the indoor heat exchanger, and a refrigerant inlet communicates with the outlet end of the indoor heat exchanger; the second port can communicate with the refrigerant inlet, and the first port can communicate with the refrigerant outlet; or, the second port can communicate with the refrigerant outlet, and the first port can communicate with the refrigerant inlet. According to the embodiment, the indoor temperature can be increased during dehumidification, the dehumidification function of the air conditioning system is increased, and the comfort level and the use experience of a user are improved.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning systems, for example, to an air conditioning system. Background Art

[0002] Air conditioning systems usually have a cooling mode and a heating mode. By circulating refrigerant in a loop formed by a compressor - outdoor heat exchanger - throttling component - indoor heat exchanger - compressor, the indoor temperature and humidity can be improved, enhancing user comfort. With the development of technology and the improvement of people's living standards, the requirements for the dehumidification function of air conditioning systems are also getting higher and higher. It is necessary for the air conditioning system to also take into account comfort during dehumidification.

[0003] In related technologies, air conditioning systems that can take into account comfort generally divide the indoor heat exchanger into two sections, and a secondary throttling mechanism is connected in series between the two sections of heat exchangers. When the secondary throttling mechanism is in a throttling state, it can make the temperature of the front - section heat exchanger higher than that of the rear - section heat exchanger, enabling the front - section heat exchanger to raise the indoor temperature, thereby compensating for the indoor temperature and achieving the technical effect of dehumidifying without lowering the temperature.

[0004] In the process of implementing the embodiments of the present disclosure, it is found that there are at least the following problems in related technologies:

[0005] The air conditioning systems in related technologies can provide heat to the indoor during dehumidification, reducing the amount of indoor temperature drop. However, the refrigerant in the front - section heat exchanger flows through the outdoor heat exchanger, and the heating capacity of the front - section heat exchanger is limited. When the indoor temperature is low and dehumidification is required, such as during the "returning south" weather in southern regions, it is unable to increase the indoor temperature. The dehumidification function of the air conditioning system is single, and the user comfort and experience are low.

[0006] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of this application. Therefore, it may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Utility Model

[0007] To have a basic understanding of some aspects of the disclosed embodiments, a simple summary is given below. This summary is not a general review, nor is it intended to identify key / important constituent elements or delineate the protection scope of these embodiments. Instead, it serves as a preface to the subsequent detailed description.

[0008] The embodiments of the present disclosure provide an air conditioning system, which can raise the indoor temperature during dehumidification, increase the dehumidification function of the air conditioning system, and improve user comfort and experience.

[0009] According to the embodiments provided by the present application, an air conditioning system is provided. The air conditioning system includes a heat exchange circuit and a flow path switching component. The heat exchange circuit includes a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger connected through heat exchange pipelines. Among them, the indoor heat exchanger includes a plurality of connected sub-heat exchangers and an electronic expansion valve, and the electronic expansion valve is arranged between two sub-heat exchangers; the flow path switching component is provided with a first port, a second port, a refrigerant inlet, and a refrigerant outlet. The first port is connected to the four-way valve, the second port is connected to the throttling device, the refrigerant outlet is connected to the inlet end of the indoor heat exchanger, and the refrigerant inlet is connected to the outlet end of the indoor heat exchanger; the second port can be connected to the refrigerant inlet, and the first port can be connected to the refrigerant outlet; or, the second port can be connected to the refrigerant outlet, and the first port can be connected to the refrigerant inlet.

[0010] In some alternative embodiments, the flow path switching component includes a first check valve, a second check valve, a third check valve, and a fourth check valve. The inlet end of the first check valve is connected to the first port, and the outlet end of the first check valve is connected to the refrigerant outlet; the inlet end of the second check valve is connected to the second port, and the outlet end of the second check valve is connected to the refrigerant outlet; the inlet end of the third check valve is connected to the refrigerant inlet, and the outlet end of the third check valve is connected to the second port; the inlet end of the fourth check valve is connected to the refrigerant inlet, and the outlet end of the fourth check valve is connected to the first port.

[0011] In some alternative embodiments, the flow path switching component further includes a first pipeline, a second pipeline, a third pipeline, and a fourth pipeline. The two ends of the first pipeline are respectively connected to the outlet end of the first check valve and the outlet end of the second check valve, and are provided with a refrigerant outlet; the two ends of the second pipeline are respectively connected to the inlet end of the second check valve and the outlet end of the third check valve, and are provided with a second port; the two ends of the third pipeline are respectively connected to the inlet end of the third check valve and the inlet end of the fourth check valve, and are provided with a refrigerant inlet; the two ends of the fourth pipeline are respectively connected to the outlet end of the fourth check valve and the inlet end of the first check valve, and are provided with a first port.

[0012] In some alternative embodiments, the first check valve, the second check valve, the third check valve, and the fourth check valve are respectively float-type check valves arranged vertically; along the horizontal direction, the first check valve, the second check valve, the third check valve, and the fourth check valve are arranged in sequence.

[0013] In some alternative embodiments, the first check valve, the second check valve, the third check valve, and the fourth check valve are respectively float-type check valves arranged vertically; along the horizontal direction, the first check valve, the second check valve, the third check valve, and the fourth check valve are arranged in an array.

[0014] In some alternative embodiments, the flow path switching component is used to be arranged outdoors.

[0015] In some alternative embodiments, a plurality of sub-heatexchangers include a first sub-heatexchanger and a second sub-heatexchanger. The inlet end of the first sub-heatexchanger is communicated with the refrigerant outlet, the outlet end of the second sub-heatexchanger is communicated with the refrigerant inlet, and two ends of the electronic expansion valve are respectively communicated with the outlet end of the first sub-heatexchanger and the inlet end of the second sub-heatexchanger.

[0016] In some alternative embodiments, the ratio range of the heat exchange area of the first sub-heatexchanger to the heat exchange area of the second sub-heatexchanger is from 0.8 to 1.2.

[0017] In some alternative embodiments, the air-conditioning system further includes an indoor fan, which is arranged on a side of the second sub-heatexchanger away from the first sub-heatexchanger, and the indoor fan can drive air to flow through the first sub-heatexchanger and the second sub-heatexchanger in sequence.

[0018] In some alternative embodiments, the air-conditioning system further includes a temperature sensing device, a humidity sensing device and a controller. The temperature sensing device is used to detect the indoor temperature, and the humidity sensing device is used to detect the indoor humidity; the temperature sensing device, the humidity sensing device, the throttling device and the electronic expansion valve are all connected to the controller, and the controller is used to receive the indoor temperature and the indoor humidity, and control the opening degrees of the throttling device and the electronic expansion valve according to the indoor temperature and the indoor humidity.

[0019] The air-conditioning system provided by the embodiments of the present disclosure can achieve the following technical effects:

[0020] By adopting this alternative embodiment, the refrigerant outlet is communicated with the inlet end of the indoor heat exchanger, and the refrigerant inlet is communicated with the outlet end of the indoor heat exchanger. Whether the air-conditioning system is in refrigeration operation or heating operation, the refrigerant can flow into the inlet end of the indoor heat exchanger through the refrigerant outlet of the flow path switching component, and flow into the refrigerant inlet from the outlet end of the indoor heat exchanger, so that the refrigerant flows out of the indoor heat exchanger. In this way, the flow direction of the refrigerant in the indoor heat exchanger can be made unique by setting the flow path switching component. The indoor heat exchanger includes a plurality of connected sub-heatexchangers and an electronic expansion valve. The electronic expansion valve is arranged between the two sub-heatexchangers, and the opening degree of the electronic expansion valve is adjustable, so that the electronic expansion valve can work for throttling or fully open without throttling. When the electronic expansion valve works for throttling, it can throttle and depressurize the refrigerant. The air-conditioning system of this embodiment can flexibly switch modes such as refrigeration, heating, cooling and dehumidification, constant temperature dehumidification and heating and dehumidification through the switching of the four-way valve, the opening degrees of the electronic expansion valve and the throttling device. When dehumidifying, it takes into account the indoor temperature adjustment, can increase the indoor temperature when dehumidifying, increases the dehumidification function of the air-conditioning system, and improves the comfort and use experience of users.

[0021] The above general description and the following description are only exemplary and explanatory, and are not used to limit the present application. Description of the Drawings

[0022] One or more embodiments are exemplarily illustrated by corresponding drawings. These exemplary illustrations and the drawings do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are regarded as similar elements. The drawings do not constitute a scale limitation, and:

[0023] Figure 1 is a schematic structural diagram of an air-conditioning system provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic structural diagram of another air-conditioning system provided by an embodiment of the present disclosure;

[0025] Figure 3 is a schematic structural diagram of yet another air-conditioning system provided by an embodiment of the present disclosure;

[0026] Figure 4 is a schematic structural diagram of yet another air-conditioning system provided by an embodiment of the present disclosure.

[0027] Reference numerals:

[0028] 100, compressor; 200, four-way valve; 300, outdoor heat exchanger; 400, throttling device; 500, indoor heat exchanger; 510, first sub-heat exchanger; 520, second sub-heat exchanger; 530, electronic expansion valve; 600, flow path switching component; 610, first check valve; 620, second check valve; 630, third check valve; 640, fourth check valve; 650, first pipeline; 660, second pipeline; 670, third pipeline; 680, fourth pipeline. Detailed implementation manners

[0029] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below with reference to the drawings. The attached drawings are only for reference and illustration purposes and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of explanation, numerous details are provided to give a full understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices can be shown in a simplified manner.

[0030] The terms "first", "second", etc. in the specification, claims and above-mentioned drawings of the embodiments of the present disclosure are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so as to implement the embodiments of the present disclosure described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0031] In the embodiments of the present disclosure, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the embodiments of the present disclosure and their examples, and are not used to limit that the indicated device, element or component must have a specific orientation, or be constructed and operated in a specific orientation. Moreover, in addition to being able to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0032] In addition, the terms "arrange", "connect", "install" should be understood in a broad sense. For example, "connect" can be a mounting connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there is an internal connection between two devices, elements or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0033] The term "and / or" is a description of the associated relationship of objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or, the three relationships of A and B.

[0034] It should be noted that, without conflict, the embodiments in the embodiments of the present disclosure and the features in the embodiments can be combined with each other.

[0035] The embodiments of the present disclosure provide an air conditioning system, as Figures 1 to 4 shown, the air conditioning system includes a heat exchange circuit and a flow path switching component 600. The heat exchange circuit includes a compressor 100, a four-way valve 200, an outdoor heat exchanger 300, a throttling device 400, and an indoor heat exchanger 500 connected through heat exchange pipelines. Among them, the indoor heat exchanger 500 includes a plurality of connected sub-heat exchangers and an electronic expansion valve 530, and the electronic expansion valve 530 is arranged between two sub-heat exchangers.

[0036] The flow path switching component 600 is provided with a first port, a second port, a refrigerant inlet, and a refrigerant outlet. The first port is connected to the four-way valve 200, the second port is connected to the throttling device 400, the refrigerant outlet is connected to the inlet end of the indoor heat exchanger 500, and the refrigerant inlet is connected to the outlet end of the indoor heat exchanger 500. The second port can be connected to the refrigerant inlet, and the first port can be connected to the refrigerant outlet; or, the second port can be connected to the refrigerant outlet, and the first port can be connected to the refrigerant inlet.

[0037] In this embodiment, the air-conditioning system includes a heat exchange circuit and a flow path switching component 600. The heat exchange circuit includes a compressor 100, a four-way valve 200, an outdoor heat exchanger 300, a throttling device 400, and an indoor heat exchanger 500 connected through heat exchange pipelines. Multiple ports of the flow path switching component 600 are respectively connected to the inlet and outlet ends of the four-way valve 200, the throttling device 400, and the indoor heat exchanger 500. Optionally, the four-way valve 200 is provided with a first valve port connected to the intake port of the compressor 100, a second valve port connected to the outlet port of the compressor 100, a third valve port connected to the first port of the flow path switching component 600, and a fourth valve port connected to the outdoor heat exchanger 300.

[0038] As Figure 1 and Figure 3 shown, when the air-conditioning system operates in refrigeration or cooling and dehumidification, the electronic expansion valve 530 is fully open without throttling, the throttling device 400 operates for throttling, the second valve port is connected to the fourth valve port, the first valve port is connected to the third valve port. The high-temperature and high-pressure refrigerant flowing out of the compressor 100 flows through the four-way valve 200 to the outdoor heat exchanger 300. The refrigerant condenses and releases heat in the outdoor heat exchanger 300. After heat exchange, it passes through the throttling device 400 for throttling and pressure reduction, and flows through the second port and the refrigerant outlet of the flow path switching component 600 to the indoor heat exchanger 500. After the refrigerant completes heat exchange in the indoor heat exchanger 500, it flows through the refrigerant inlet and the first port to the third valve port of the four-way valve 200, and then flows back to the intake port of the compressor 100 through the first valve port to complete a refrigeration cycle.

[0039] As Figure 2 and Figure 4 shown, when the air-conditioning system operates in heating, the electronic expansion valve 530 is fully open without throttling, the throttling device 400 operates for throttling, the second valve port is connected to the third valve port, the first valve port is connected to the fourth valve port. The high-temperature and high-pressure refrigerant flowing out of the compressor 100 flows through the four-way valve 200 and then to the first port of the flow path switching component 600, and flows into the indoor heat exchanger 500 through the refrigerant outlet of the flow path switching component 600. The refrigerant releases heat in the indoor heat exchanger 500. After heat exchange, it flows through the refrigerant inlet and the second port to the throttling device 400, and after throttling and pressure reduction by the throttling device 400, it flows into the outdoor heat exchanger 300. After evaporating and absorbing heat in the outdoor heat exchanger 300, it flows back into the compressor 100 through the fourth valve port and the first valve port to complete a heating cycle.

[0040] With this alternative embodiment, the refrigerant outlet is communicated with the inlet end of the indoor heat exchanger 500, and the refrigerant inlet is communicated with the outlet end of the indoor heat exchanger 500. Whether the air-conditioning system is operating in the cooling mode or the heating mode, the refrigerant can flow into the inlet end of the indoor heat exchanger 500 through the refrigerant outlet of the flow path switching component 600, and flow into the refrigerant inlet from the outlet end of the indoor heat exchanger 500, so that the refrigerant flows out of the indoor heat exchanger 500. In this way, the flow direction of the refrigerant in the indoor heat exchanger 500 can be made unique by setting the flow path switching component 600.

[0041] The indoor heat exchanger 500 includes a plurality of connected sub-heat exchangers and an electronic expansion valve 530. The electronic expansion valve 530 is arranged between two sub-heat exchangers, and the opening degree of the electronic expansion valve 530 is adjustable, so that the electronic expansion valve 530 can operate for throttling or fully open without throttling. When the electronic expansion valve 530 operates for throttling, it can throttle and reduce the pressure of the refrigerant.

[0042] As Figure 2 and Figure 4 shown, when heating and dehumidifying are required, the air conditioner can operate in the heating mode. The electronic expansion valve 530 operates for throttling, and the throttling device 400 is fully open without throttling. Along the refrigerant flow direction, the sub-heat exchanger upstream of the electronic expansion valve 530 is a condenser, which releases heat to the room and increases the room temperature; the heat exchanger downstream of the electronic expansion valve 530 is an evaporator, and the downstream heat exchanger can dehumidify the indoor air and reduce the indoor humidity. In this application, when operating in the heating mode, the refrigerant flows into the upper-stream sub-heat exchanger after flowing out of the compressor 100. In this way, the heating capacity of the upper-stream sub-heat exchanger is relatively large, and the heating capacity of the upper-stream sub-heat exchanger can be greater than the heating capacity of the sub-heat exchanger after the refrigerant flows from the outdoor heat exchanger 300 into the indoor heat exchanger 500, so that the indoor temperature can be effectively increased during dehumidification, and heating and dehumidification in the room can be realized.

[0043] As Figure 1 and Figure 3 shown, when constant temperature dehumidification is required, the air conditioner can operate in the cooling mode. The electronic expansion valve 530 operates for throttling, and the throttling device 400 is fully open without throttling. In this way, the refrigerant flowing into the upper-stream sub-heat exchanger has passed through the outdoor heat exchanger 300, and the heating capacity in the upstream sub-heat exchanger is relatively reduced, so as to realize constant temperature dehumidification in the room.

[0044] In this way, the air-conditioning system of this embodiment can flexibly switch modes such as cooling, heating, cooling and dehumidifying, constant temperature dehumidifying and heating and dehumidifying through the switching of the four-way valve 200, and the opening degrees of the electronic expansion valve 530 and the throttling device 400. When dehumidifying, it takes into account the indoor temperature adjustment, can increase the indoor temperature during dehumidification, increases the dehumidification function of the air-conditioning system, and improves the comfort and usage experience of users.

[0045] In some alternative embodiments, such as Figures 1 to 4As shown, the flow path switching assembly 600 includes a first one-way valve 610, a second one-way valve 620, a third one-way valve 630, and a fourth one-way valve 640. The inlet end of the first one-way valve 610 is communicated with the first port, and the outlet end of the first one-way valve 610 is communicated with the refrigerant outlet. The inlet end of the second one-way valve 620 is communicated with the second port, and the outlet end of the second one-way valve 620 is communicated with the refrigerant outlet. The inlet end of the third one-way valve 630 is communicated with the refrigerant inlet, and the outlet end of the third one-way valve 630 is communicated with the second port. The inlet end of the fourth one-way valve 640 is communicated with the refrigerant inlet, and the outlet end of the fourth one-way valve 640 is communicated with the first port.

[0046] In this embodiment, the first port of the flow path switching assembly 600 is communicated with the four-way valve 200, the second port is communicated with the throttling device 400, and the refrigerant flow at the first port and the second port is bidirectional.

[0047] The inlet end of the first one-way valve 610 is communicated with the first port, the outlet end of the first one-way valve 610 is communicated with the refrigerant outlet, and the outlet end of the fourth one-way valve 640 is communicated with the first port. In this way, the first one-way valve 610 and the fourth one-way valve 640 can make the refrigerant flowing into from the first port flow out through the refrigerant outlet.

[0048] The inlet end of the third one-way valve 630 is communicated with the refrigerant inlet, the outlet end of the third one-way valve 630 is communicated with the second port, the inlet end of the second one-way valve 620 is communicated with the second port, and the outlet end of the second one-way valve 620 is communicated with the refrigerant outlet. Since the high-temperature and high-pressure refrigerant flowing out of the compressor 100 flows through the refrigerant outlet at this time, the refrigerant pressure at the outlet end of the second one-way valve 620 is greater than the pressure at the inlet end of the second one-way valve 620. The refrigerant flowing out of the indoor heat exchanger 500 can flow through the refrigerant inlet and the third one-way valve 630 in sequence and then flow out from the second port to flow to the throttling device 400.

[0049] The inlet end of the second one-way valve 620 is communicated with the second port, the outlet end of the second one-way valve 620 is communicated with the refrigerant outlet, and the outlet end of the third one-way valve 630 is communicated with the second port. In this way, the second one-way valve 620 and the third one-way valve 630 can make the refrigerant flowing into from the second port flow out through the refrigerant outlet.

[0050] The inlet end of the fourth one-way valve 640 is communicated with the refrigerant inlet, the outlet end of the fourth one-way valve 640 is communicated with the first port, the inlet end of the third one-way valve 630 is communicated with the refrigerant inlet, and the outlet end of the third one-way valve 630 is communicated with the second port. The pressure of the refrigerant flowing into the flow path switching assembly 600 through the second port by the throttling device 400 is greater than the pressure of the refrigerant flowing into the flow path switching assembly 600 through the refrigerant inlet by the indoor heat exchanger 500. At this time, the refrigerant flowing out of the indoor heat exchanger 500 can flow through the refrigerant inlet and the fourth one-way valve 640 in sequence and then flow out from the first port to flow to the four-way valve 200.

[0051] In this way, by setting the first one-way valve 610, the second one-way valve 620, the third one-way valve 630 and the fourth one-way valve 640, the refrigerant can be automatically switched in different modes, and the refrigerant flow path in the indoor heat exchanger 500 is unique. When the air-conditioning system switches the working mode, the flow direction of the refrigerant in the indoor heat exchanger 500 is not changed, so that the refrigerant can quickly respond to the flow direction of the heat exchange circuit and improve the switching efficiency.

[0052] Moreover, by integrating multiple one-way valves in the flow path switching assembly 600, the simplified design of the complex flow path is realized, the structural complexity and manufacturing cost of the air-conditioning system are reduced, and the reliability and maintenance convenience of the air-conditioning system are improved.

[0053] Exemplarily, as Figure 2 and Figure 3 shown, the flow path switching assembly 600 further includes a first pipeline 650, a second pipeline 660, a third pipeline 670 and a fourth pipeline 680. The two ends of the first pipeline 650 are respectively communicated with the outlet end of the first one-way valve 610 and the outlet end of the second one-way valve 620, and the first pipeline 650 is provided with a refrigerant outlet. The two ends of the second pipeline 660 are respectively communicated with the inlet end of the second one-way valve 620 and the outlet end of the third one-way valve 630, and the second pipeline 660 is provided with a second port.

[0054] The two ends of the third pipeline 670 are respectively communicated with the inlet end of the third one-way valve 630 and the inlet end of the fourth one-way valve 640, and the third pipeline 670 is provided with a refrigerant inlet. The two ends of the fourth pipeline 680 are respectively communicated with the outlet end of the fourth one-way valve 640 and the inlet end of the first one-way valve 610, and the fourth pipeline 680 is provided with a first port.

[0055] In this embodiment, by setting the first pipeline 650, the second pipeline 660, the third pipeline 670 and the fourth pipeline 680, the multiple one-way valves can be connected according to the set requirements, the complexity of setting the flow path switching assembly 600 and the manufacturing cost are reduced, and the reliability and maintenance convenience of the system are improved.

[0056] In some alternative embodiments, the flow path switching assembly 600 is configured to be disposed outdoors.

[0057] In this embodiment, the flow path switching component 600 is integrated into a single component, which facilitates installation for the user and reduces the difficulty of connecting the flow path switching component 600 to the heat exchange circuit.

[0058] The flow path switching component 600 is disposed outdoors to reduce the occurrence of noise generated when the refrigerant flows through the flow path switching component 600 from disturbing the user and improve the user experience.

[0059] In some alternative embodiments, as Figure 1 and Figure 4 shown, the first check valve 610, the second check valve 620, the third check valve 630, and the fourth check valve 640 are respectively float-type check valves arranged vertically.

[0060] In this embodiment, the first check valve 610, the second check valve 620, the third check valve 630, and the fourth check valve 640 are respectively float-type check valves arranged vertically. That is to say, the installation height of the inlet end of the first check valve 610 is lower than the installation height of the outlet end of the first check valve 610, the installation height of the inlet end of the second check valve 620 is lower than the installation height of the outlet end of the second check valve 620, the installation height of the inlet end of the third check valve 630 is lower than the installation height of the outlet end of the third check valve 630, and the installation height of the inlet end of the fourth check valve 640 is lower than the installation height of the outlet end of the fourth check valve 640. In this way, the refrigerant is connected when flowing upward in the check valve and cut off when flowing downward, so as to reduce the occurrence of liquid leakage when the check valve is placed horizontally or upside down, and improve the stability and reliability of the operation of the air conditioning system.

[0061] Exemplarily, as Figures 1 to 4 shown, along the horizontal direction, the first check valve 610, the second check valve 620, the third check valve 630, and the fourth check valve 640 are arranged in sequence or in an array.

[0062] In this embodiment, along the horizontal direction, the first check valve 610, the second check valve 620, the third check valve 630, and the fourth check valve 640 are arranged in sequence or in an array, which can make the arrangement of multiple check valves more compact and improve the utilization rate of space.

[0063] As Figure 3 and Figure 4 shown, along the horizontal direction, the first check valve 610, the second check valve 620, the third check valve 630, and the fourth check valve 640 are arranged in sequence, which facilitates the user to identify different check valves through the installation positions and improves the installation efficiency.

[0064] As Figure 1 and Figure 2As shown, the first check valve 610, the second check valve 620, the third check valve 630 and the fourth check valve 640 are arranged in an array, which facilitates the connection between the corresponding check valves, can shorten the length between the corresponding communication pipelines, reduce the resistance of the refrigerant during the flow process, improve the flow efficiency of the refrigerant, and thus improve the overall energy efficiency of the air-conditioning system.

[0065] In some alternative embodiments, the float check valve includes a valve body, a valve seat and a valve core. The valve body encloses an internal passage having an inlet end and an outlet end. The valve seat is disposed in the internal passage, and the valve seat is provided with a flow port. The valve core is disposed in the internal passage, and the valve core is located on one side of the valve seat facing the outlet end of the internal passage. The valve core is used to open or close the flow port.

[0066] In this embodiment, the installation height of the inlet end of the float check valve is lower than the installation height of the outlet end of the float check valve. That is to say, along the vertical direction, the valve core is disposed above the valve seat. In this way, when the refrigerant flows from the inlet end to the outlet end and the pressure at the inlet end is greater than the pressure at the outlet end, the refrigerant can overcome the gravity of the valve core to open the flow port, and the float check valve is connected. When the refrigerant flows from the outlet end to the inlet end, the gravity of the refrigerant and the valve core will press the valve core on the valve seat to close the flow port to cut off the float check valve, and the refrigerant does not flow.

[0067] In some alternative embodiments, as Figures 1 to 4 shown, the plurality of sub-heat exchangers include a first sub-heat exchanger 510 and a second sub-heat exchanger 520. The inlet end of the first sub-heat exchanger 510 is communicated with the refrigerant outlet, the outlet end of the second sub-heat exchanger 520 is communicated with the refrigerant inlet, and both ends of the electronic expansion valve 530 are respectively communicated with the outlet end of the first sub-heat exchanger 510 and the inlet end of the second sub-heat exchanger 520.

[0068] In this embodiment, the inlet end of the first sub-heat exchanger 510 is communicated with the refrigerant outlet, the outlet end of the second sub-heat exchanger 520 is communicated with the refrigerant inlet, and both ends of the electronic expansion valve 530 are respectively communicated with the outlet end of the first sub-heat exchanger 510 and the inlet end of the second sub-heat exchanger 520. In this way, the inlet end of the first sub-heat exchanger 510 is the inlet end of the indoor heat exchanger 500, the outlet end of the second sub-heat exchanger 520 is the outlet end of the indoor heat exchanger 500, the sub-heat exchanger upstream of the electronic expansion valve 530 mentioned above is the first sub-heat exchanger 510, and the sub-heat exchanger downstream of the electronic expansion valve 530 is the second sub-heat exchanger 520. During constant temperature dehumidification or heating dehumidification, the first sub-heat exchanger 510 is a condenser to provide heat to the room, and the second sub-heat exchanger 520 is an evaporator to reduce the indoor humidity.

[0069] In some alternative embodiments, the air conditioning system further includes an indoor blower, which is disposed on the side of the second sub-heat exchanger 520 away from the first sub-heat exchanger 510, and the indoor blower can drive air to flow through the first sub-heat exchanger 510 and the second sub-heat exchanger 520 in sequence.

[0070] In this embodiment, during constant temperature dehumidification and heating dehumidification, the first sub-heat exchanger 510 is always a condenser, which can provide heat to the room, and the second sub-heat exchanger 520 is always an evaporator, which can provide cold to the room to dehumidify the indoor air.

[0071] The indoor blower is disposed on the side of the second sub-heat exchanger 520 away from the first sub-heat exchanger 510, and the indoor blower can drive air to flow through the first sub-heat exchanger 510 and the second sub-heat exchanger 520 in sequence. In this way, by setting the flow path switching component 600, the flow direction of the refrigerant in the indoor heat exchanger 500 can be made unique. In this way, whether the air conditioning system is operating in cooling or heating mode, the first sub-heat exchanger 510 is always a condenser, and the second sub-heat exchanger 520 is always an evaporator, so that the indoor blower can drive air to pass through the evaporator for dehumidification first and then through the condenser for heating during constant temperature dehumidification or heating dehumidification, improving the consistency of air flow, reducing the situation where air is heated first and then dehumidified under different dehumidification modes, and improving the dehumidification and heating effects.

[0072] In some alternative embodiments, the ratio range of the heat exchange area of the first sub-heat exchanger 510 to the heat exchange area of the second sub-heat exchanger 520 is 0.8 to 1.2.

[0073] Adopting this alternative embodiment, the ratio of the heat exchange area of the first sub-heat exchanger 510 to the heat exchange area of the second sub-heat exchanger 520 is between 0.8 and 1.2, making the heat exchange capacities of the first sub-heat exchanger 510 and the second sub-heat exchanger 520 relatively close, reducing the situation where the dehumidification or heating capacity is weak due to too large a difference in heat exchange capacity, and improving the balance of the heat exchange capacities of the first sub-heat exchanger 510 and the second sub-heat exchanger 520.

[0074] Exemplarily, the ratio of the heat exchange area of the first sub-heat exchanger 510 to the heat exchange area of the second sub-heat exchanger 520 can be 0.8, 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.05 or 1.2.

[0075] In some alternative embodiments, the air conditioning system further includes a temperature sensing device, a humidity sensing device and a controller. The temperature sensing device is used to detect the indoor temperature, the humidity sensing device is used to detect the indoor humidity, and the temperature sensing device, the humidity sensing device, the throttling device 400 and the electronic expansion valve 530 are all connected to the controller. The controller is used to receive the indoor temperature and the indoor humidity, and adjust the opening degrees of the throttling device 400 and the electronic expansion valve 530 according to the indoor temperature and the indoor humidity.

[0076] In this embodiment, the controller can receive the indoor temperature and indoor humidity, and adjust the opening degrees of the throttling device 400 and the electronic expansion valve 530 according to the indoor temperature and indoor humidity, so as to adjust the heat exchange modes of multiple sub-heat exchangers, making different sub-heat exchangers in different condensation heat release states or evaporation heat absorption states, so as to adjust the heat exchange amounts of multiple sub-heat exchangers, realizing heating, cooling, cooling and dehumidifying, constant temperature dehumidifying, heating and dehumidifying and other modes of the air conditioning system, and taking into account the indoor temperature adjustment during dehumidification, being able to increase the indoor temperature during dehumidification, increasing the dehumidification function of the air conditioning system, and improving the comfort and user experience of the user.

[0077] When the indoor humidity is greater than or equal to the first preset humidity and the indoor temperature is less than the preset temperature, the controller controls the air conditioning system to operate in heating mode, the electronic expansion valve 530 is opened to the first opening degree, and the throttling device 400 is fully opened without throttling, so that the first sub-heat exchanger 510 operates in the first heating mode and the second sub-heat exchanger 520 operates in the first cooling mode.

[0078] In this embodiment, when the indoor humidity is greater than the first preset humidity and the indoor temperature is less than the preset temperature, it indicates that the indoor humidity is relatively high and the indoor temperature is relatively low, such as in the "returning south" weather. At this time, the controller controls the air conditioning system to operate in heating mode, the first sub-heat exchanger 510 operates in the first heating mode, and the second sub-heat exchanger 520 operates in the first cooling mode. In this way, the refrigerant flowing out of the compressor 100 first flows into the first sub-heat exchanger 510 through the flow path switching component 600, increasing the heating capacity of the first sub-heat exchanger 510. The refrigerant flowing out of the first sub-heat exchanger 510 flows into the second sub-heat exchanger 520 and the outdoor heat exchanger 300. The second sub-heat exchanger 520 operates in the first sub-cooling mode. At this time, both the second sub-heat exchanger 520 and the outdoor heat exchanger 300 are evaporators, and the heat exchange amount of the second sub-heat exchanger 520 is less than that of the first sub-heat exchanger 510, so that the overall heating capacity of the indoor heat exchanger 500 is greater than the cooling capacity, being able to increase the indoor temperature during dehumidification and improving the comfort and user experience of the user.

[0079] When the air conditioning system operates in heating mode, after the refrigerant flows out of the compressor 100, it can flow sequentially in the first sub-heat exchanger 510, the electronic expansion valve 530, the second sub-heat exchanger 520, the throttling device 400 and the outdoor heat exchanger 300.

[0080] The electronic expansion valve 530 is opened to the first opening degree, and the throttling device 400 is fully opened without throttling. The electronic expansion valve 530 can throttle and depressurize the refrigerant. In this way, the first sub-heat exchanger 510 is a condenser, and the second sub-heat exchanger 520 and the outdoor heat exchanger 300 are evaporators, so that the first sub-heat exchanger 510 can operate in the first heating mode and the second sub-heat exchanger 520 can operate in the first cooling mode.

[0081] Optionally, when the indoor humidity is less than the first preset humidity, and the indoor humidity is greater than or equal to the second preset humidity, the indoor temperature is less than the preset temperature, and the indoor temperature is greater than or equal to the second preset temperature, the controller controls the air-conditioning system to operate in heating mode, the electronic expansion valve 530 is opened to the second opening degree, and the throttling device 400 is fully opened without throttling; wherein, the first opening degree is less than the second opening degree. So that the first sub-heat exchanger 510 operates in the second heating mode, the second sub-heat exchanger 520 operates in the second cooling mode, and the cooling capacity of the first cooling mode is greater than the cooling capacity of the second cooling mode.

[0082] In this embodiment, when the indoor humidity is less than the first preset humidity, and the indoor humidity is greater than or equal to the second preset humidity, and the indoor temperature is less than the preset temperature, it indicates that the indoor humidity is relatively small, but still needs dehumidification, and the temperature is relatively low. At this time, the controller controls the air-conditioning system to operate in heating mode, the first sub-heat exchanger 510 operates in the second heating mode, the second sub-heat exchanger 520 operates in the second cooling mode, and the cooling capacity of the second cooling mode is less than the cooling capacity of the first cooling mode. In this way, the cooling capacity of the second sub-heat exchanger 520 is relatively small, which can reduce the cooling effect on the indoor temperature while meeting the air dehumidification requirement, so as to further increase the indoor temperature and improve the heating effect on the indoor during dehumidification.

[0083] The controller controls the electronic expansion valve 530 to be opened to the second opening degree, and the second opening degree is greater than the first opening degree, that is, the throttling effect of the electronic expansion valve 530 on the refrigerant when it is opened to the second opening degree is less than the throttling effect of the electronic expansion valve 530 on the refrigerant when it is opened to the first opening degree, thereby reducing the cooling capacity of the second sub-heat exchanger 520 when it operates in the second cooling mode.

[0084] In some alternative embodiments, when the indoor humidity is greater than or equal to the first preset humidity and the indoor temperature is greater than or equal to the preset temperature, the controller controls the air-conditioning system to operate in cooling mode, the electronic expansion valve 530 is opened to the third opening degree, and the throttling device 400 is fully opened without throttling, so that the first sub-heat exchanger 510 operates in the third heating mode and the second sub-heat exchanger 520 operates in the third cooling mode.

[0085] In this embodiment, when the indoor humidity is greater than or equal to the first preset humidity and the indoor temperature is greater than or equal to the preset temperature, it indicates that the indoor humidity is relatively high and the indoor temperature is appropriate. At this time, the controller controls the air-conditioning system to operate in the cooling mode. The first heat exchanger operates in the third heating mode, and the second sub-heat exchanger 520 operates in the third cooling mode. In this way, the refrigerant flowing out of the compressor 100 flows into the first sub-heat exchanger 510 after passing through the outdoor heat exchanger 300, so that the heating capacity in the first sub-heat exchanger 510 is less than the heating capacity when the first sub-heat exchanger 510 operates in the first cooling mode or the second cooling mode, thereby reducing the heating capacity in the first sub-heat exchanger 510 and making the difference between the heating capacity in the first sub-heat exchanger 510 and the cooling capacity in the second sub-heat exchanger 520 relatively small, so as to maintain the current indoor temperature and improve the stability of the constant-temperature dehumidification of the air-conditioning system.

[0086] When the air-conditioning system operates in the cooling mode, after the refrigerant flows out of the compressor 100, it can flow sequentially through the outdoor heat exchanger 300, the throttling device 400, the first sub-heat exchanger 510, the electronic expansion valve 530, and the second sub-heat exchanger 520. The electronic expansion valve 530 is opened to the third opening degree, the throttling device 400 is fully opened without throttling, and the electronic expansion valve 530 can throttle and depressurize the refrigerant. The outdoor heat exchanger 300 and the first sub-heat exchanger 510 are condensers, and the second sub-heat exchanger 520 is an evaporator to reduce the heating capacity of the first sub-heat exchanger 510, thereby maintaining the indoor temperature.

[0087] Optionally, when the indoor humidity is less than the first preset humidity, the indoor humidity is greater than or equal to the second preset humidity, and the indoor temperature is greater than or equal to the preset temperature, the controller controls the air-conditioning system to operate in the cooling mode, the electronic expansion valve 530 is opened to the fourth opening degree, and the throttling device 400 is fully opened without throttling, where the third opening degree is less than the fourth opening degree, so that the first sub-heat exchanger 510 operates in the fourth heating mode, the second sub-heat exchanger 520 operates in the fourth cooling mode, and the cooling capacity of the third cooling mode is greater than the cooling capacity of the fourth cooling mode.

[0088] With this optional embodiment, when the indoor humidity is less than the first preset humidity, the indoor temperature is greater than or equal to the first preset temperature, the indoor humidity is greater than or equal to the second preset humidity, and the indoor temperature is greater than or equal to the preset temperature, it indicates that the indoor humidity is relatively small, but still needs to be dehumidified, and the indoor temperature is appropriate. At this time, the controller controls the air-conditioning to operate in the cooling mode. The first sub-heat exchanger 510 operates in the fourth heating mode, the second sub-heat exchanger 520 operates in the fourth cooling mode, and the cooling capacity of the fourth cooling mode is less than the cooling capacity of the fourth cooling mode. In this way, the cooling capacity of the second sub-heat exchanger 520 is relatively small, and the cooling effect on the indoor temperature is reduced while meeting the air dehumidification requirement, so as to improve the stability of the indoor temperature.

[0089] The controller controls the electronic expansion valve 530 to start to the fourth opening degree, and the fourth opening degree is greater than the third opening degree. That is, when the electronic expansion valve 530 is opened to the fourth opening degree, the throttling effect on the refrigerant is less than that when the electronic expansion valve 530 is opened to the third opening degree, thereby reducing the refrigerating capacity of the second sub-heat exchanger 520 when operating in the fourth refrigeration mode.

[0090] Optionally, the air conditioning system further includes an outdoor fan, and the outdoor fan is used to drive the outdoor air flow through the outdoor heat exchanger 300 so that the outdoor heat exchanger 300 can exchange heat with the outdoor air.

[0091] In some alternative embodiments, when the indoor humidity is greater than or equal to the first preset humidity and the indoor temperature is greater than or equal to the preset temperature, the controller further controls the outdoor fan to operate at the first speed;

[0092] When the indoor humidity is less than the first preset humidity, and the indoor humidity is greater than or equal to the second preset humidity, and the indoor temperature is greater than or equal to the preset temperature, the controller further controls the outdoor fan to operate at the second speed; wherein, the first speed is less than the second speed.

[0093] In this embodiment, when the first sub-heat exchanger 510 operates in the third heating mode, the outdoor fan operates at the first speed, and when the first sub-heat exchanger 510 operates in the fourth heating mode, the outdoor fan operates at the second speed. The heat exchange amount of the outdoor heat exchanger 300 when the outdoor fan operates at the first speed is less than the heat exchange amount of the outdoor heat exchanger 300 when the outdoor fan operates at the second speed. In this way, the heating capacity of the first sub-heat exchanger 510 when operating in the third heating mode is greater than the heating capacity of the first sub-heat exchanger 510 when operating in the fourth heating mode, so that the heating capacity of the first sub-heat exchanger 510 is adapted to the refrigerating capacity of the second sub-heat exchanger 520, improving the temperature stability of the air conditioning system during constant temperature dehumidification and enhancing the user experience.

[0094] Optionally, when the indoor humidity is less than the second preset humidity, that is, it indicates that the indoor air does not need to be dehumidified, the controller controls the electronic expansion valve 530 to be fully opened without throttling, and the controller controls the air conditioning system to operate in the refrigeration or heating mode in the conventional design according to the indoor temperature. Those skilled in the art can set it according to actual needs or experience and will not be specifically limited herein.

[0095] The above description and the drawings fully illustrate embodiments of the present disclosure so that those skilled in the art can practice them. Other embodiments may include structural and other changes. Embodiments represent only possible variations. Unless explicitly required, individual components and functions are optional, and the order of operations may vary. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments. Embodiments of the present disclosure are not limited to the structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An air conditioning system, characterized in that, Comprising: A heat exchange circuit, including a compressor, a four-way valve, an outdoor heat exchanger, a throttling device, and an indoor heat exchanger connected through heat exchange pipelines. Among them, the indoor heat exchanger includes a plurality of connected sub-heat exchangers and an electronic expansion valve, and the electronic expansion valve is arranged between two sub-heat exchangers; A flow path switching component, provided with a first port, a second port, a refrigerant inlet, and a refrigerant outlet. The first port is connected to the four-way valve, the second port is connected to the throttling device, the refrigerant outlet is connected to the inlet end of the indoor heat exchanger, and the refrigerant inlet is connected to the outlet end of the indoor heat exchanger; The second port can be connected to the refrigerant inlet, and the first port can be connected to the refrigerant outlet; or, the second port can be connected to the refrigerant outlet, and the first port can be connected to the refrigerant inlet.

2. The air conditioning system according to claim 1, characterized in that, The flow path switching component includes: A first check valve, with the inlet end connected to the first port and the outlet end connected to the refrigerant outlet; A second check valve, with the inlet end connected to the second port and the outlet end connected to the refrigerant outlet; A third check valve, with the inlet end connected to the refrigerant inlet and the outlet end connected to the second port; A fourth check valve, with the inlet end connected to the refrigerant inlet and the outlet end connected to the first port.

3. The air-conditioning system according to claim 2, characterized in that, The flow path switching component further includes: A first pipeline, with both ends respectively connected to the outlet ends of the first check valve and the second check valve, and provided with a refrigerant outlet; A second pipeline, with both ends respectively connected to the inlet end of the second check valve and the outlet end of the third check valve, and provided with a second port; A third pipeline, with both ends respectively connected to the inlet ends of the third check valve and the fourth check valve, and provided with a refrigerant inlet; A fourth pipeline, with both ends respectively connected to the outlet end of the fourth check valve and the inlet end of the first check valve, and provided with a first port.

4. The air conditioning system according to claim 2, wherein The first check valve, the second check valve, the third check valve, and the fourth check valve are respectively vertical float type check valves; In the horizontal direction, the first check valve, the second check valve, the third check valve, and the fourth check valve are arranged in sequence.

5. The air conditioning system according to claim 2, wherein The first check valve, the second check valve, the third check valve, and the fourth check valve are respectively vertical float type check valves; In the horizontal direction, the first check valve, the second check valve, the third check valve, and the fourth check valve are arranged in an array.

6. The air conditioning system according to claim 1, wherein The flow path switching component is used to be arranged outdoors.

7. The air conditioning system according to any one of claims 1 to 6, wherein The plurality of sub-heat exchangers include a first sub-heat exchanger and a second sub-heat exchanger. The inlet end of the first sub-heat exchanger is connected to the refrigerant outlet, the outlet end of the second sub-heat exchanger is connected to the refrigerant inlet, and both ends of the electronic expansion valve are respectively connected to the outlet end of the first sub-heat exchanger and the inlet end of the second sub-heat exchanger.

8. The air conditioning system according to claim 7, wherein The ratio range of the heat exchange area of the first sub-heat exchanger to the heat exchange area of the second sub-heat exchanger is 0.8 to 1.

2.

9. The air conditioning system according to claim 7, wherein The air-conditioning system further includes an indoor fan, which is arranged on the side of the second sub-heat exchanger facing away from the first sub-heat exchanger, and the indoor fan can drive air to flow through the first sub-heat exchanger and the second sub-heat exchanger in sequence.

10. The air-conditioning system according to any one of claims 1 to 6, characterized in that, It further includes: a temperature sensing device for detecting the indoor temperature; a humidity sensing device for detecting the indoor humidity; a controller, the temperature sensing device, the humidity sensing device, the throttling device and the electronic expansion valve are all connected to the controller, and the controller is used to receive the indoor temperature and the indoor humidity, and adjust the opening degrees of the throttling device and the electronic expansion valve according to the indoor temperature and the indoor humidity.

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