Control valves, air conditioning systems and air conditioners

Abstract

This invention discloses a control valve, an air conditioning system, and an air conditioner. The control valve includes a valve body and a valve core. The valve body forms a valve cavity with eight ports arranged circumferentially on the valve cavity. The valve core is movably and sealingly installed within the valve cavity. Corresponding to a first working position, the eight ports are in a first connected state. Corresponding to a second working position, the eight ports are in a second connected state, and the eight ports are staggered between the second and first connected states. The movement of the valve core controls the switching of the eight ports between the first and second positions, controlling the flow direction of the refrigerant in the refrigerant circulation loop. This ensures that the refrigerant flows through the indoor heat exchanger in the same direction in both cooling and heating modes. Simultaneously, the refrigerant flows through the indoor heat exchanger in the same direction in both cooling and heating modes. That is, both the indoor and outdoor heat exchangers are in a fully counter-current state under both cooling and heating conditions, thus solving the problem of low heat exchange efficiency in existing control valves.

Description

Technical Field

[0001] This invention relates to the field of heat exchange systems, and more particularly to control valves, air conditioning systems, and air conditioners. Background Technology

[0002] In the heat exchange system of an air conditioner, the refrigerant circulates through the compressor, the outdoor condenser, the expansion valve, and the indoor evaporator. In the heat exchanger, the temperature difference affects the amount of heat transfer. From the heat transfer formula Q=KA(ΔTm), it can be seen that the larger ΔTm is, the larger the heat transfer Q is. Among the heat exchangers, the counter-flow heat exchanger has the largest average temperature difference and the highest heat exchange efficiency. The counter-flow heat exchanger is a heat exchanger in which the flow direction of the refrigerant is opposite to the flow direction of the air exchanging heat with the outside.

[0003] Traditional air conditioning systems are designed for counter-current operation only under a single operating condition. While switching refrigerant through a two-position four-way valve, they can only guarantee counter-current heat exchange under a single operating condition. That is, when the air conditioner switches from cooling mode to heating mode, only the outdoor condenser or the indoor evaporator can be in counter-current mode. It cannot simultaneously satisfy the requirement that both the outdoor condenser and the indoor evaporator are in full counter-current heat exchange. Therefore, it is often not possible to maintain high heat exchange efficiency in both cooling and heating modes, resulting in low heat exchange energy efficiency. Summary of the Invention

[0004] The main objective of this invention is to provide a control valve, an air conditioning system, and an air conditioner, which aims to solve the problem of low heat exchange efficiency in existing control valves.

[0005] To achieve the above objectives, the present invention provides a control valve, wherein the control valve comprises:

[0006] The valve body has a valve cavity, and eight ports are provided on the valve cavity along its circumference; and,

[0007] A valve core is movably and sealingly mounted within the valve cavity to have a first working position and a second working position;

[0008] Corresponding to the first working position, the eight ports have a first connected state in which they are connected in pairs at intervals.

[0009] Corresponding to the second working position, the eight ports have a second connection state in which they are connected in pairs at intervals, and the eight ports are staggered in the second connection state and the first connection state.

[0010] Optionally, the valve core moves along the length of the valve body, and the valve body has a first setting end and a second setting end opposite to each other along its width direction. The first setting end has three ports, and the second setting end has another five ports.

[0011] The valve core is provided with three connecting slots, including a first connecting slot disposed on the valve core facing the first setting end, the first connecting slot being able to switch between connecting two adjacent ports among the three ports;

[0012] The three connecting slots also include two second connecting slots spaced apart along the length of the valve body at the end of the valve core facing the second setting end. One of the second connecting slots can switch between connecting two adjacent ports of the three ports on one side, and the other second connecting slot can switch between connecting two adjacent ports of the three ports on the other side.

[0013] During the active stroke of the valve core, two end communication cavities are formed at both ends in the length direction of the valve cavity, which are used to connect the two ports on the corresponding side.

[0014] The present invention also provides an air conditioning system having a heating mode and a cooling mode, the air conditioning system forming a refrigerant circulation loop, the refrigerant circulation loop including an outdoor refrigerant flow path and an indoor refrigerant flow path, the outdoor refrigerant flow path having an outdoor flow regulating section flowing through an outdoor heat exchanger, and the indoor refrigerant flow path having an indoor flow regulating section flowing through an indoor heat exchanger.

[0015] A flow direction switching device is provided on the refrigerant circulation loop. The flow direction switching device is used to switch the refrigerant flow direction on at least part of the refrigerant circulation loop so that the air conditioning system can switch between the cooling mode and the heating mode.

[0016] The outdoor flow regulating section has the same flow direction in both the cooling and heating modes, and the indoor flow regulating section has the same flow direction in both the cooling and heating modes.

[0017] Optionally, the flow direction switching device includes a control valve, which is configured as described above, and the control valve includes:

[0018] The valve body has a valve cavity, and eight ports are provided on the valve cavity along its circumference; and,

[0019] A valve core is movably and sealingly mounted within the valve cavity to have a first working position and a second working position;

[0020] Corresponding to the first working position, the eight ports have a first connected state in which they are connected in pairs at intervals.

[0021] Corresponding to the second working position, the eight ports have a second connection state in which they are connected in pairs at intervals, and the eight ports are staggered in the second connection state and the first connection state.

[0022] Optionally, the air conditioning system further includes a compressor, an outdoor heat exchanger, a throttling valve, and an indoor heat exchanger;

[0023] The control valve has eight ports, including a first port, a second port, a third port, a fourth port, a fifth port, a sixth port, a seventh port, and an eighth port arranged sequentially on the valve body. The first port, the second port, and the third port are located on one side of the valve body, and the fourth port, the fifth port, the sixth port, the seventh port, and the eighth port are located on the other side of the valve body.

[0024] The outdoor flow diversion section is located between the first inlet and the seventh inlet;

[0025] The indoor flow regulation section is located between the third outlet and the fifth outlet;

[0026] The two ends of the throttle valve are respectively connected to the fourth port and the eighth port;

[0027] The compressor's exhaust port is connected to the second port, and its return port is connected to the sixth port.

[0028] Optionally, the air conditioning system further includes a compressor, and the flow direction switching device includes a four-way valve and a one-way valve assembly;

[0029] The four-way valve is used to switch the connection between the compressor's exhaust port and the refrigerant inlet of the indoor heat exchanger or the refrigerant inlet of the outdoor heat exchanger.

[0030] The one-way valve assembly includes multiple one-way valves, some of which are connected in series and / or in parallel with the outdoor heat exchanger to ensure that the flow direction of the outdoor flow regulating section is the same.

[0031] Some of the one-way valves are connected in series and / or in parallel with the indoor heat exchanger to ensure that the flow direction of the indoor flow regulating section is the same.

[0032] Optionally, the air conditioning system further includes a throttling valve, the four-way valve having a first connecting port, a second connecting port, a third connecting port and a fourth connecting port arranged in sequence;

[0033] The indoor flow regulating section is located between the second connecting port and the throttle valve;

[0034] The outdoor flow regulating section is located between the fourth connecting port and the throttle valve;

[0035] The compressor's exhaust port is connected to the first communication port, and its return port is connected to the third communication port.

[0036] Optionally, the plurality of said one-way valves include:

[0037] Two first series check valves are respectively connected in series at both ends of the outdoor heat exchanger; and,

[0038] Two first parallel check valves, one of which is connected in parallel with the outdoor heat exchanger and a first series check valve, and the other is connected in parallel with the outdoor heat exchanger and another first series check valve.

[0039] The two first series check valves have the same conduction direction, the two first parallel check valves have the same conduction direction, the conduction direction of the first series check valve is opposite to that of the first parallel check valve, and the conduction outlet of the first series check valve located between the fourth connection port and the outdoor heat exchanger is connected to the outdoor heat exchanger.

[0040] Optionally, the plurality of said one-way valves include:

[0041] Two second series-connected one-way valves are respectively connected in series at both ends of the indoor heat exchanger; and,

[0042] Two second parallel check valves, one of which is connected in parallel with the indoor heat exchanger and a second series check valve, and the other is connected in parallel with the indoor heat exchanger and another second series check valve;

[0043] The two second series check valves have the same conduction direction, the two second parallel check valves have the same conduction direction, the conduction direction of the second series check valve is opposite to that of the second parallel check valve, and the conduction inlet of the second series check valve located between the second connection port and the indoor heat exchanger is connected to the indoor heat exchanger.

[0044] The present invention also provides an air conditioner, the air conditioner further comprising the above-described air conditioner system, the air conditioner system comprising:

[0045] The valve body has a valve cavity, and eight ports are provided on the valve cavity along its circumference; and,

[0046] A valve core is movably and sealingly mounted within the valve cavity to have a first working position and a second working position;

[0047] Corresponding to the first working position, the eight ports have a first connected state in which they are connected in pairs at intervals.

[0048] Corresponding to the second working position, the eight ports have a second connection state in which they are connected in pairs at intervals, and the eight ports are staggered in the second connection state and the first connection state.

[0049] In the technical solution provided by this invention, the control valve includes a valve body and a valve core. The valve body forms a valve cavity and eight ports communicating with the valve cavity. The eight ports are arranged circumferentially along the valve cavity. The valve core is movably and sealingly installed within the valve cavity. The eight ports are respectively connected to the refrigerant inlet or outlet of the compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger in the air conditioning system. When the valve core is in the first working position, the eight ports are in a first interconnected state, sequentially connected in pairs, corresponding to the cooling condition of the air conditioning system. When the valve core moves to the second working position, the eight ports are in a second interconnected state, sequentially connected in pairs. In the connected state, the eight ports are staggered between the second connected state and the first connected state. At this time, corresponding to the heating mode of the air conditioning system, the movement of the valve core controls the switching of the eight ports of the control valve between the first position and the second position, controlling the flow direction of the refrigerant in the refrigerant circulation loop, so that the refrigerant flows through the indoor heat exchanger in the same direction in both the cooling mode and the heating mode. At the same time, the refrigerant flows through the indoor heat exchanger in the same direction in both the cooling mode and the heating mode. That is, the indoor heat exchanger and the outdoor heat exchanger are in a full counter-current state in both the cooling and heating modes, so as to solve the problem of low heat exchange efficiency of the existing control valve. Attached Figure Description

[0050] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0051] Figure 1 A schematic diagram of an embodiment of the control valve provided by the present invention in a first working position;

[0052] Figure 2 for Figure 1 A schematic diagram of an embodiment of the control valve in the second operating position;

[0053] Figure 3 This is a schematic diagram of an embodiment of a control valve in the first working position in an air conditioning system provided by the present invention.

[0054] Figure 4 for Figure 3A schematic diagram of the control valve in the second operating position in an air conditioning system;

[0055] Figure 5 This is a schematic diagram of an embodiment of a four-way valve in the first adjustment position in an air conditioning system provided by the present invention.

[0056] Figure 6 This is a schematic diagram of the four-way valve in the second adjustment position in the air conditioner system provided by the present invention.

[0057] Explanation of icon numbers:

[0058]

[0059] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0061] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0062] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0063] In an air conditioning heat exchange system, the refrigerant circulates through a compressor, outdoor condenser, expansion valve, and indoor evaporator. Among the heat exchangers, the counter-current heat exchanger has the largest average temperature difference and the highest heat exchange efficiency. A counter-current heat exchanger is one where the refrigerant flow direction is opposite to the flow direction of the air exchanging heat with the outside. However, traditional air conditioning systems are only designed for a single operating condition. While switching the refrigerant using a two-position four-way valve, they can only ensure that either the outdoor condenser or the indoor evaporator is in a counter-current state. They cannot simultaneously meet the requirement of full counter-current heat exchange in both cooling and heating conditions. This means that high heat exchange efficiency cannot be maintained in both cooling and heating conditions, resulting in low energy efficiency in heat exchange.

[0064] To solve the above problems, the present invention provides a control valve 100. Figures 1 to 2 This is a specific embodiment of the control valve 100 provided by the present invention.

[0065] Please see Figures 1 to 2 The control valve 100 includes a valve body 1 and a valve core 2. The valve body 1 forms a valve cavity, and eight ports are provided on the valve cavity along its circumference. The valve core 2 is sealed and movably installed in the valve cavity to have a first working position and a second working position. Corresponding to the first working position, the eight ports have a first connected state in which they are connected in pairs in sequence. Corresponding to the second working position, the eight ports have a second connected state in which they are connected in pairs in sequence. The eight ports are staggered in their connection in the second connected state and the first connected state.

[0066] In the technical solution provided by this invention, the control valve 100 includes a valve body 1 and a valve core 2. The valve body 1 forms a valve cavity and eight ports communicating with the valve cavity. The eight ports are arranged circumferentially along the valve cavity. The valve core 2 is sealed and movably installed in the valve cavity, and the eight ports are respectively connected to the inlet or outlet of the refrigerant passage of the compressor 200, indoor heat exchanger 400, throttle valve 500, and outdoor heat exchanger 300 in the air conditioning system. When the valve core 2 is in the first working position, the eight ports have a first connected state with sequentially spaced pairs, corresponding to the cooling condition of the air conditioning system. When the valve core 2 moves to the second working position, the eight ports have a second connected state with sequentially spaced pairs. In the second connected state, the eight ports are staggered between the second connected state and the first connected state. This corresponds to the heating mode of the air conditioning system. The movement of the valve core 2 controls the switching of the eight ports of the control valve 100 between the first and second positions, controlling the flow direction of the refrigerant in the refrigerant circulation loop. This ensures that the refrigerant flows through the indoor heat exchanger 400 in the same direction in both the cooling and heating modes. In other words, the refrigerant flows through the indoor heat exchanger 400 in the same direction in both the cooling and heating modes. That is, both the indoor heat exchanger 400 and the outdoor heat exchanger 300 are in a full counter-current state under both cooling and heating conditions, thus solving the problem of low heat exchange efficiency of the existing control valve 100.

[0067] Specifically, the valve body 1 and the valve core 2 are connected to the two ports through a formed communicating cavity. In this embodiment, the valve core 2 is made shorter so that it can move along the length of the valve body 1. To enable the valve core 2 to switch during sliding, eight ports can be provided on two opposite sides of the valve body 1. Specifically, the valve body 1 has a first setting end 1a and a second setting end 1b opposite to each other in its width direction. Three ports are provided on the first setting end 1a, and the other five ports are provided on the second setting end 1b. To connect adjacent ports, multiple grooves can be recessed on the periphery of the valve core 2. A cavity is formed between the inner wall surfaces of the valve chamber, and the length of the groove is sufficient to cover the distance between two adjacent openings, allowing the cavity to connect the two openings. Specifically, in this embodiment, three connecting grooves are provided on the valve core 2, one of which is located on the valve core 2 facing the first setting end 1a. Since the first setting end 1a has three openings, when the valve core 2 moves, as shown in the figure, the connecting groove can switch from connecting the middle opening and an adjacent upper opening to connecting the middle opening and an adjacent lower opening. Thus, the first connecting groove a can connect when switching between cooling and heating modes. Switching between two adjacent ports out of the three ports works on a similar principle. Since the second setting end 1b has five ports, two second connecting grooves b, spaced apart along the length of the valve body 1, are provided at the end of the valve core 2 facing the second setting end 1b. One of the two second connecting grooves b can switch between two adjacent ports on one side of the three ports (as shown in the diagram), connecting the three ports closer to the upper side. The other second connecting groove b can switch between two adjacent ports on the other side of the three ports (as shown in the diagram), connecting the ports closer to the upper side. The three ports on the lower side are designed to allow the uppermost and lowermost ports of the second setting end 1b to switch and connect with the uppermost and lowermost ports of the first setting end 1a. Specifically, since the length of the valve core 2 is shorter than the length of the valve cavity, there is a gap between the two ends of the valve core 2 and the valve cavity. When the valve core 2 moves along the length direction of the valve cavity, the two ends of the valve core 2 will form a cavity with the inner wall surface of the end of the valve cavity. During the movement stroke of the valve core 2, two end connecting cavities c are formed at the two ends in the length direction of the valve cavity, which are used to connect the two ports on the corresponding side. In this way, each pair of three adjacent ports can be staggered and connected.

[0068] Specifically, the valve core 2 can be driven by either electromagnetic or pneumatic methods. As one possible implementation, a control mechanism can be provided at the end of the valve body 1 of the control valve 100. This control mechanism includes a stationary iron core, an elastic component, and a moving iron core. The stationary iron core is fixedly connected to the valve body 1 and connected to the moving iron core via the elastic component. The moving iron core is connected to the valve core 2. An electromagnetic coil is provided on the stationary iron core. When the electromagnetic coil is energized, it generates an electromagnetic force that attracts the moving iron core to move towards the stationary iron core, overcoming the elastic force of the elastic component, thereby moving the valve core 2 to the second working position. When the electromagnetic coil is de-energized, the elastic component uses its own elastic force to drive the moving iron core away from the stationary iron core, thereby moving the valve core 2 to the first working position.

[0069] It should be noted that, considering that the valve core 2 is in direct contact with the inner wall of the valve cavity, in order to ensure the smooth movement and sealing performance of the valve core 2, the valve core 2 can be made of copper or plastic with self-lubricating properties. Of course, the valve body 1 can also be made of copper, or other materials that meet the strength requirements can be used.

[0070] The present invention also provides an air conditioning system 1000, please refer to [link / reference]. Figures 3 to 6Because the air conditioning system 1000 has a heating mode and a cooling mode, in cooling mode, the refrigerant flows from the compressor 200 to the outdoor heat exchanger 300, then through the expansion valve 500 to the indoor heat exchanger 400, and finally back to the compressor 200. In heating mode, the refrigerant flows from the compressor 200 to the indoor heat exchanger 400, then through the expansion valve 500 to the outdoor heat exchanger 300, and finally back to the compressor 200. Therefore, in the refrigerant circulation loop of the air conditioning system 1000, the refrigerant circulation loop includes an outdoor refrigerant flow path and an indoor refrigerant flow path. The outdoor refrigerant flow path has an outdoor flow regulating section flowing through the outdoor heat exchanger 300, and the indoor refrigerant flow path has an indoor flow regulating section flowing through the indoor heat exchanger 400. It can be understood that the outdoor flow regulating section and the indoor flow regulating section are connected in series in the refrigerant circulation loop. In order to achieve the desired effect regardless of whether the outdoor flow regulating section is used for heating or cooling, the refrigerant is used in the indoor heat exchanger 400. In both cooling and heating modes, the airflow direction is the same, i.e., it is set in the opposite direction to the external airflow, forming a fully counter-current outdoor heat exchanger 300. Simultaneously, the indoor airflow regulating section also maintains the same airflow direction in both heating and cooling modes, i.e., it is also set in the opposite direction to the external airflow, forming a fully counter-current indoor heat exchanger 400. In this embodiment, a flow direction switching device is provided on the refrigerant circulation loop. This device switches the overall refrigerant circulation loop's flow direction and also switches the refrigerant flow direction on at least a portion of the refrigerant circulation loop. This ensures that when the air conditioning system 1000 switches between cooling and heating modes, the outdoor airflow regulating section maintains the same flow direction in both modes, and the indoor airflow regulating section maintains the same flow direction in both modes.

[0071] In the technical solution provided by this invention, since the flow direction of the external heat exchange air is fixed, in cooling mode, the refrigerant flows from the compressor 200 to the outdoor heat exchanger 300, then through the throttle valve 500 to the indoor heat exchanger 400, and finally back to the compressor 200. Those skilled in the art can set the flow direction of the external heat exchange air to be opposite to the refrigerant flow direction of both the indoor heat exchanger 400 and the outdoor heat exchanger 300, forming a counter-current heat exchanger to achieve optimal heat exchange. When switching to heating mode, the refrigerant flows from the compressor 200 to the indoor heat exchanger 400, then through the throttle valve 500 to the outdoor heat exchanger 300, and finally back to the compressor 200. However, while the direction of the external heat exchange air flow remains unchanged, in order to ensure that the flow direction of the indoor heat exchanger 400 and the outdoor heat exchanger 300 is... In the case of a 0-degree counter-current heat exchanger, the refrigerant must flow in the same direction as in cooling mode when passing through the indoor heat exchanger 400 and the outdoor heat exchanger 300. This ensures that both heat exchangers achieve full counter-current heat exchange regardless of whether they are in heating or cooling mode. By setting the flow direction switching device to adjust the flow direction of the outdoor and indoor flow adjustment sections, the indoor heat exchanger 400 and the outdoor heat exchanger 300 can be set to flow in the opposite direction to the outside air in both heating and cooling conditions, achieving full counter-current heat exchange. This solves the problem that the existing air conditioning system 1000 can only achieve full counter-current heat exchange in one of its two heat exchangers, resulting in low heat exchange efficiency.

[0072] The full counter-current heat exchange of the air conditioning system 1000 can be achieved by using multiple multi-way valves that work together to switch between each other, or by using a multi-way valve and multiple one-way valves to achieve switching and regulation. However, in order to keep the piping layout as simple as possible and the cost as low as possible, general air conditioning systems aim to achieve the most functions with the simplest structure and wiring layout. For details, please refer to [link / reference]. Figures 3 to 4 In the first embodiment, the flow direction switching device includes a control valve, which is configured as the control valve 100 described above. The eight ports of the control valve 100 can be connected one-to-one with the refrigerant inlet and outlet of the compressor 200, outdoor heat exchanger 300, throttle valve 500, and indoor heat exchanger 400. By switching the eight ports of the control valve 100 between a first position and a second position, the flow direction of the refrigerant in the refrigerant circulation loop is controlled, ensuring that the refrigerant flows through the indoor heat exchanger 400 in the same direction in both the cooling and heating modes.

[0073] Specifically, please refer to Figures 1 to 4In this embodiment, the air conditioning system 1000 further includes a compressor 200, an outdoor heat exchanger 300, a throttling valve 500, and an indoor heat exchanger 400. The compressor 200 has an exhaust port and a return port, the indoor heat exchanger 400 has a refrigerant inlet and a refrigerant outlet, the outdoor heat exchanger 300 has a refrigerant inlet and a refrigerant outlet, and the throttling valve 500 also has a refrigerant inlet and a refrigerant outlet. The control valve 100 has eight ports, including a first port sequentially arranged on the valve body 1. The valve body 1 is provided with a first port 11, a second port 12, a third port 13, a fourth port 14, a fifth port 15, a sixth port 16, a seventh port 17, and an eighth port 18. The first port 11, the second port 12, and the third port 13 are located on one side of the valve body 1, while the fourth port 14, the fifth port 15, the sixth port 16, the seventh port 17, and the eighth port 18 are located on the other side of the valve body 1. The first port 11 is used to connect with the outdoor heat exchanger 300. The first port 11 is connected to the refrigerant inlet of the compressor 200; the second port 12 is connected to the discharge port of the compressor 200; the third port 13 is connected to the refrigerant inlet of the indoor heat exchanger 400; the fourth port 14 is connected to the refrigerant outlet of the throttle valve 500; the fifth port 15 is connected to the refrigerant outlet of the indoor heat exchanger 400; the sixth port 16 is connected to the return port of the compressor 200; and the seventh port 17 is connected to the refrigerant outlet of the outdoor heat exchanger 300. The refrigerant outlet is connected, and the eighth port 18 is used to connect with the refrigerant inlet of the throttle valve 500. This arrangement places the outdoor flow regulating section between the first port 11 and the seventh port 17, and the indoor flow regulating section between the third port 13 and the fifth port 15. The two ends of the throttle valve 500 are respectively connected to the fourth port 14 and the eighth port 18. The exhaust port of the compressor 200 is connected to the second port 12, and the return port is connected to the sixth port 16.

[0074] The air conditioning system operates as follows: When the valve core 2 is in the first working position, the refrigerant is compressed by the compressor 200 to form a high-temperature and high-pressure state. It flows from the refrigerant outlet of the compressor 200 through the second port 12, and then through the first connecting groove a to the first port 11. The refrigerant flows out from the first port 11 and towards the refrigerant inlet of the outdoor heat exchanger 300, where it undergoes condensation heat exchange, achieving sufficient counter-current heat exchange and forming a low-temperature state. The refrigerant then flows from the refrigerant outlet of the outdoor heat exchanger 300 to the seventh port 17 of the control valve 100. The seventh port 17 is connected to the eighth port 18 through the second connecting groove b. The refrigerant flows from the eighth port 18 to the refrigerant inlet of the throttle valve 500. After passing through the throttle valve 500, the refrigerant exits from the throttle valve... The refrigerant outlet of 500 flows to the fourth port 14. The fourth port 14 is connected to the third port 13 through the connecting cavity c formed by the valve core 2 and the inner wall of the valve cavity. The refrigerant flows through the third port 13 to the refrigerant inlet of the indoor heat exchanger 400. In the indoor heat exchanger 400, evaporation heat exchange occurs, absorbing heat from the outside air to form a cooling mode. It also achieves sufficient counter-current heat exchange, forming a relatively high temperature state. Then, it flows from the refrigerant outlet of the indoor heat exchanger 400 to the fifth port 15 of the control valve 100. The fifth port 15 is connected to the sixth port 16 through another second connecting groove b. The refrigerant flows out from the sixth port 16 and flows to the return port of the compressor 200, thus completing a refrigerant circulation circuit. The indoor unit is in cooling mode.

[0075] When the valve core 2 is in the second working position, the refrigerant, after being compressed by the compressor 200, forms a high-temperature and high-pressure state. It flows from the refrigerant outlet of the compressor 200 through the second port 12, and then through the first connecting groove a to the third port 13. The refrigerant flows out from the third port 13 and towards the refrigerant inlet of the indoor heat exchanger 400, where it undergoes condensation heat exchange, achieving sufficient counter-current heat exchange. From the refrigerant outlet of the indoor heat exchanger 400, it flows to the fifth port 15 of the control valve 100. The fifth port 15 is connected to the fourth port 14 through the second connecting groove b. The refrigerant flows from the fourth port 14 to the refrigerant outlet of the throttle valve 500. After passing through the throttle valve 500, the refrigerant flows out from the... The refrigerant inlet of the throttle valve 500 flows to the eighth port 18. The eighth port 18 is connected to the fifth port 15 through the communicating cavity c formed by the valve core 2 and the inner wall of the valve cavity. The refrigerant flows through the fifth port 15 to the refrigerant inlet of the outdoor heat exchanger 300, where it undergoes evaporative heat exchange and achieves sufficient counter-current heat exchange. Then, it flows from the refrigerant outlet of the outdoor heat exchanger 300 to the seventh port 17 of the control valve 100. The seventh port 17 is connected to the sixth port 16 through another second communicating groove b. The refrigerant flows out from the sixth port 16 and flows to the return port of the compressor 200, thus completing a refrigerant circulation circuit. The indoor unit is in heating mode.

[0076] In another embodiment, please refer to Figures 5 to 6The air conditioning system 1000 also includes a compressor 200. The flow direction switching device includes a four-way valve 600 and a one-way valve assembly. The four-way valve 600 is similar in structure and function to a traditional two-position four-way valve 600. The four-way valve 600 is used to switch the connection between the exhaust port of the compressor 200 and the refrigerant inlet of the indoor heat exchanger 400 or the refrigerant inlet of the outdoor heat exchanger 300. However, in the traditional four-way valve 600, when connecting the compressor 200, indoor heat exchanger 400, expansion valve 500 and outdoor heat exchanger 300, one of the heat exchangers is set in the opposite direction to the flow of the outside heat exchange air, and the other heat exchanger is set in the same direction as the flow of the outside heat exchange air. That is, only one of the heat exchangers is set in the same direction as the flow of the outside heat exchange air. One heat exchanger can be in a counter-current heat exchange state. When the refrigerant flow direction is switched, the direction of the refrigerant through the flow regulation section of the indoor heat exchanger 400 and the outdoor heat exchanger 300 is also completely reversed. In this way, only one of the two heat exchangers forms a counter-current heat exchange state. In this embodiment, the one-way valve assembly includes multiple one-way valves. When some of the one-way valves are connected in series, in parallel, or in both series and parallel with the outdoor heat exchanger 300, the flow direction of the outdoor flow regulation section is the same. Similarly, when some of the one-way valves are connected in series, in parallel, or in both series and parallel with the indoor heat exchanger 400, the flow direction of the indoor flow regulation section is the same.

[0077] Furthermore, in this embodiment, the air conditioning system 1000 further includes a throttle valve 500, and the four-way valve 600 includes a four-way valve body 3, the four-way valve body 3 forming a four-way valve cavity, and a first connecting port 31, a second connecting port 32, a third connecting port 33, and a fourth connecting port 34, all of which are connected to the four-way valve cavity. The first connecting port 31 is connected to the exhaust port of the compressor 200, the fourth connecting port 34 is connected to the refrigerant inlet of the outdoor heat exchanger 300, the third connecting port 33 is connected to the return port of the compressor 200, and the second connecting port 32 is connected to the refrigerant outlet of the indoor heat exchanger 400; the four-way valve The body 3 also includes a regulating valve core 4. The regulating valve core 4 forms a first conducting cavity, a second conducting cavity, and a third conducting cavity with the inner wall of the four-way valve cavity. The regulating valve core 4 is movably disposed within the four-way valve cavity to have a first adjusting position and a second adjusting position. In the first working position, the first conducting cavity connects the first connecting port 31 and the fourth connecting port 34, and the second conducting cavity connects the third connecting port 13 and the second connecting port 12. In the second working position, the second conducting cavity connects the fourth connecting port 34 and the third connecting port 33, and the third conducting cavity connects the first connecting port 31 and the second connecting port 32. To achieve switching, the indoor flow regulating section is located between the second connecting port 32 and the throttle valve 500, and the outdoor flow regulating section is located between the fourth connecting port 34 and the throttle valve 500. The exhaust port of the compressor 200 is connected to the first connecting port 31, and the return port is connected to the third connecting port 33.

[0078] Specifically, in this embodiment, the plurality of one-way valves include two first series one-way valves 5 and two first parallel one-way valves 6. The two first series one-way valves 5 are respectively connected in series at both ends of the outdoor heat exchanger 300. One of the two first parallel one-way valves 6 is connected in parallel with the outdoor heat exchanger 300 and one of the first series one-way valves 5, and the other first parallel one-way valve 6 is connected in parallel with the outdoor heat exchanger 300 and the other first series one-way valve 5. It can be understood that, in order to achieve flow, the two first series one-way valves... The first series check valve 5, which is located between the fourth connecting port 34 and the outdoor heat exchanger 300, has its outlet connected to the outdoor heat exchanger 300. When the regulating valve core 4 of the four-way valve 600 is in the first regulating position, the refrigerant flowing out from the second connecting port 32 can enter the refrigerant inlet of the outdoor heat exchanger 300 through one of the first series check valves 5, and the refrigerant outlet of the outdoor heat exchanger 300 can flow into the refrigerant inlet of the throttling valve 500 through another of the first series check valves 5. The two first parallel check valves 6 have the same conduction direction, and the first series check valve 5 has the opposite conduction direction to the first parallel check valve 6. When the regulating valve core 4 of the four-way valve 600 is in the second regulating position, the refrigerant flowing out from the refrigerant outlet of the throttle valve 500 can enter the refrigerant inlet of the outdoor heat exchanger 300 through one of the first parallel check valves 6, and the refrigerant outlet of the outdoor heat exchanger 300 can flow into the second connecting port 32 of the four-way valve 600 through another first parallel check valve 6.

[0079] Specifically, the plurality of one-way valves includes two second series one-way valves 7 and two second parallel one-way valves 8. The two second series one-way valves 7 are respectively connected in series at both ends of the indoor heat exchanger 400. Of the two second parallel one-way valves 8, one is connected in parallel with the indoor heat exchanger 400 and one of the second series one-way valves 7, and the other is connected in parallel with the indoor heat exchanger 400 and the other of the second series one-way valves 7. Similarly, to achieve flow, the two second series one-way valves 7 have the same conduction direction, and the conduction inlet of the second series one-way valve 7 located between the second connection port 32 and the indoor heat exchanger 400 is connected to the indoor heat exchanger 400. When the regulating valve core 4 of the four-way valve 600 is in the first regulating position, the flow from the throttling valve... The refrigerant flowing out of the refrigerant outlet of 500 can enter the refrigerant inlet of the indoor heat exchanger 400 through a second series check valve 7, and flow from the refrigerant outlet of the indoor heat exchanger 400 into the fourth connecting port 34 of the four-way valve 600 through another second series check valve 7. The two second parallel check valves 8 have the same conduction direction, and the conduction direction of the second series check valve 7 is opposite to that of the second parallel check valve 8. When the regulating valve core 4 of the four-way valve 600 is in the second regulating position, the refrigerant flowing out of the fourth connecting port 34 can enter the refrigerant inlet of the outdoor heat exchanger 300 through a second parallel check valve 8, and flow from the refrigerant outlet of the indoor heat exchanger 400 into the refrigerant outlet of the throttling valve 500 through another second parallel check valve 8.

[0080] The present invention also provides an air conditioner, which includes the air conditioner system 1000 described above. The specific structure of the air conditioner system 1000 is as described in the above embodiments. Since the air conditioner adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by all the technical solutions of all the above embodiments, which will not be described in detail here.

[0081] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A control valve, characterized in that, include: The valve body has a valve cavity, and eight ports are provided circumferentially on the valve cavity. The eight ports include a first port, a second port, a third port, a fourth port, a fifth port, a sixth port, a seventh port, and an eighth port arranged sequentially on the valve body. The first port and the seventh port are used to connect to the two ends of the outdoor heat exchanger; the third port and the fifth port are used to connect to the two ends of the indoor heat exchanger; the fourth port and the eighth port are used to connect to the two ends of the throttling valve; the second port is used to connect to the exhaust port of the compressor; and the sixth port is used to connect to the return port of the compressor. as well as, A valve core is movably and sealingly mounted within the valve cavity to have a first working position and a second working position; Corresponding to the first working position, the first port is connected to the second port, the third port is connected to the fourth port, the fifth port is connected to the sixth port, and the seventh port is connected to the eighth port, so as to correspond to the cooling condition of the air conditioning system; Corresponding to the second working position, the second port is connected to the third port, the fourth port is connected to the fifth port, the sixth port is connected to the seventh port, and the eighth port is connected to the first port, so as to correspond to the heating mode of the air conditioning system; The refrigerant flows through the indoor heat exchanger in the same direction under both cooling and heating conditions, and the refrigerant also flows through the outdoor heat exchanger in the same direction under both cooling and heating conditions.

2. The control valve as described in claim 1, characterized in that, The valve core is slidably disposed relative to the valve body. The valve body has a first set end and a second set end located opposite to each other on both sides of the sliding direction of the valve core. The first set end is provided with three ports, and the second set end is provided with another five ports. The valve core is provided with three connecting slots, including a first connecting slot disposed on the valve core facing the first setting end, the first connecting slot being able to switch between connecting two adjacent ports among the three ports; The three connecting slots also include two second connecting slots spaced apart along the length of the valve body at the end of the valve core facing the second setting end. One of the second connecting slots can switch between connecting two adjacent ports of the three ports on one side, and the other second connecting slot can switch between connecting two adjacent ports of the three ports on the other side. During the active stroke of the valve core, two end communication cavities are formed at both ends in the length direction of the valve cavity, which are used to connect the two ports on the corresponding side.

3. An air conditioning system, characterized in that, The air conditioning system has a heating mode and a cooling mode. The air conditioning system forms a refrigerant circulation loop. The refrigerant circulation loop includes an outdoor refrigerant flow path and an indoor refrigerant flow path. The outdoor refrigerant flow path has an outdoor flow regulating section that flows through an outdoor heat exchanger. The indoor refrigerant flow path has an indoor flow regulating section that flows through an indoor heat exchanger. A flow direction switching device is provided on the refrigerant circulation loop. The flow direction switching device is used to switch the refrigerant flow direction on at least part of the refrigerant circulation loop so that the air conditioning system can switch between the cooling mode and the heating mode. Wherein, the outdoor flow regulating section has the same flow direction in both the cooling mode and the heating mode, and the indoor flow regulating section has the same flow direction in both the cooling mode and the heating mode; The air conditioning system also includes a compressor, an outdoor heat exchanger, a throttling valve, and an indoor heat exchanger; The flow direction switching device includes a control valve, which is configured as described in any one of claims 1 to 2.

4. The air conditioning system as described in claim 3, characterized in that, The first port, the second port, and the third port are located on one side of the valve body, while the fourth port, the fifth port, the sixth port, the seventh port, and the eighth port are located on the other side of the valve body.

5. An air conditioning system, characterized in that, The air conditioning system has a heating mode and a cooling mode. The air conditioning system forms a refrigerant circulation loop. The refrigerant circulation loop includes an outdoor refrigerant flow path and an indoor refrigerant flow path. The outdoor refrigerant flow path has an outdoor flow regulating section that flows through an outdoor heat exchanger. The indoor refrigerant flow path has an indoor flow regulating section that flows through an indoor heat exchanger. A flow direction switching device is provided on the refrigerant circulation loop. The flow direction switching device is used to switch the refrigerant flow direction on at least part of the refrigerant circulation loop so that the air conditioning system can switch between the cooling mode and the heating mode. Wherein, the outdoor flow regulating section has the same flow direction in both the cooling mode and the heating mode, and the indoor flow regulating section has the same flow direction in both the cooling mode and the heating mode; The air conditioning system also includes a compressor, and the flow direction switching device includes a four-way valve and a one-way valve assembly; The four-way valve is used to switch the connection between the compressor's exhaust port and the refrigerant inlet of the indoor heat exchanger or the refrigerant inlet of the outdoor heat exchanger. The one-way valve assembly includes multiple one-way valves, some of which are connected in series and / or in parallel with the outdoor heat exchanger to ensure that the flow direction of the outdoor flow regulating section is the same. Some of the one-way valves are connected in series and / or in parallel with the indoor heat exchanger to ensure that the flow direction of the indoor flow regulating section is the same.

6. The air conditioning system as described in claim 5, characterized in that, The air conditioning system also includes a throttling valve, and the four-way valve has a first connecting port, a second connecting port, a third connecting port and a fourth connecting port arranged in sequence; The indoor flow regulating section is located between the second connecting port and the throttle valve; The outdoor flow regulating section is located between the fourth connecting port and the throttle valve; The compressor's exhaust port is connected to the first communication port, and its return port is connected to the third communication port.

7. The air conditioning system as described in claim 6, characterized in that, The plurality of said one-way valves include: Two first series check valves are respectively connected in series at both ends of the outdoor heat exchanger; and, Two first parallel check valves, one of which is connected in parallel with the outdoor heat exchanger and a first series check valve, and the other is connected in parallel with the outdoor heat exchanger and another first series check valve. The two first series check valves have the same conduction direction, the two first parallel check valves have the same conduction direction, the conduction direction of the first series check valve is opposite to that of the first parallel check valve, and the conduction outlet of the first series check valve located between the fourth connection port and the outdoor heat exchanger is connected to the outdoor heat exchanger.

8. The air conditioning system as described in claim 6, characterized in that, The plurality of said one-way valves include: Two second series-connected one-way valves are respectively connected in series at both ends of the indoor heat exchanger; and, Two second parallel check valves, one of which is connected in parallel with the indoor heat exchanger and a second series check valve, and the other is connected in parallel with the indoor heat exchanger and another second series check valve; The two second series check valves have the same conduction direction, the two second parallel check valves have the same conduction direction, the conduction direction of the second series check valve is opposite to that of the second parallel check valve, and the conduction inlet of the second series check valve located between the second connection port and the indoor heat exchanger is connected to the indoor heat exchanger.

9. An air conditioner, characterized in that, Includes the air conditioning system as described in any one of claims 3 to 8.

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