Air conditioner

Abstract

The utility model discloses a kind of air conditioners, air conditioner includes: compressor;Indoor heat exchanger;Outdoor heat exchanger;Four-way valve;Throttling unit, one end of throttling unit is connected with the third end of outdoor heat exchanger, and another end of throttling unit is connected with the first end of indoor heat exchanger;First check valve, one end of first check valve is connected with the outlet of compressor, another end of first check valve is connected with the first interface of four-way valve, and first check valve only allows refrigerant to flow from the outlet of compressor to the first interface of four-way valve;On-off valve, on-off valve is connected between the third end of outdoor heat exchanger and the first end of indoor heat exchanger, and on-off valve is connected with throttling unit in series.According to the air conditioner of the utility model embodiment, refrigerant can be sealed in condenser by first check valve and on-off valve when compressor stops, to avoid refrigerant flowing from condenser to evaporator or back to compressor, which is conducive to reducing the power and energy consumption of compressor, and facilitating compressor to start again.

Description

Technical Field

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

[0002] Air conditioners in related technologies typically include a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a four-way valve connected in a refrigerant circuit. By switching the state of the four-way valve, the flow direction of the refrigerant can be adjusted, thereby controlling one of the outdoor heat exchanger and the indoor heat exchanger to act as a condenser and the other as an evaporator, so as to provide cooling or heating for the indoor environment.

[0003] Furthermore, the air conditioner also includes a throttling unit, which can throttle and cool the refrigerant flowing through it to increase the subcooling of the refrigerant, thereby improving the heat exchange efficiency between the refrigerant and the air when it flows through the indoor or outdoor heat exchanger.

[0004] However, when the compressor stops, because the condenser side is the high-pressure side and the evaporator side is the low-pressure side, before the pressure is balanced, the refrigerant will continue to flow from the condenser to the evaporator or back to the compressor under the action of the pressure difference. When the compressor is restarted, there will be too much refrigerant flowing from the evaporator to the compressor, resulting in a large load on the compressor and difficulty in starting it. This leads to an increase in the compressor power. Furthermore, when the compressor restarts, it must move the refrigerant from the low-pressure side to the high-pressure side, which will result in the consumption of additional electricity and increase the energy consumption of the compressor. Utility Model Content

[0005] This utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of this utility model is to provide an air conditioner in which, when the compressor stops, the refrigerant can be sealed in the condenser through a first one-way valve and an on / off valve, so as to prevent the refrigerant from flowing from the condenser to the evaporator or back to the compressor, which helps to reduce the power and energy consumption of the compressor and facilitates the restart of the compressor.

[0006] To achieve the above objectives, an air conditioner is provided according to an embodiment of the present invention. The air conditioner includes: a compressor having an inlet and an outlet; an indoor heat exchanger having a first end and a second end for exchanging heat with indoor air; an outdoor heat exchanger having a third end and a fourth end for exchanging heat with outdoor air, wherein the third end of the outdoor heat exchanger is connected to the first end of the indoor heat exchanger; and a four-way valve having: a first port connected to the outlet; a second port connected to the fourth end of the outdoor heat exchanger; a third port connected to the inlet; and a fourth port connected to the second end of the indoor heat exchanger. The four-way valve controls the connection between the first port and the fourth port. The second interface is connected to the third interface, or the four-way valve controls the first interface to connect to the second interface and the third interface to connect to the fourth interface; the air conditioner further includes: a throttling unit, one end of which is connected to the third end of the outdoor heat exchanger, and the other end of which is connected to the first end of the indoor heat exchanger; wherein, the air conditioner further includes: a first one-way valve, one end of which is connected to the outlet of the compressor, and the other end of which is connected to the first interface of the four-way valve, the first one-way valve only allowing refrigerant to flow from the outlet of the compressor to the first interface of the four-way valve; an on-off valve, which is connected between the third end of the outdoor heat exchanger and the first end of the indoor heat exchanger, and the on-off valve is connected in series with the throttling unit.

[0007] The above technical solution has the following advantages or beneficial effects: When the compressor stops, the first one-way valve can prevent refrigerant from flowing back from the condenser to the compressor, and the on / off valve can close instantaneously. In this way, at the moment the compressor stops, refrigerant can be prevented from flowing from the high-pressure side condenser to the low-pressure side evaporator. Thus, by combining the first one-way valve and the on / off valve, the high-pressure refrigerant can be sealed in the condenser, preventing the refrigerant from flowing to the low-pressure side evaporator under the action of pressure difference. That is, when the compressor stops, there is no refrigerant flow between the condenser, the evaporator, and the compressor. The refrigerant in the condenser can be maintained at a high pressure, and the refrigerant in the evaporator can be maintained at a low pressure. This allows the distribution of refrigerant when the compressor stops to be consistent with the distribution when the compressor is running stably. In this way, when the compressor restarts, the amount of refrigerant in the compressor will not be excessive. The compressor can use a lower output power to enable the air conditioning system to quickly perform heat exchange response, thereby reducing the energy consumption of the compressor and improving the seasonal energy efficiency ratio of the air conditioner.

[0008] According to some embodiments of the present invention, the on / off valve is located between the third end of the outdoor heat exchanger and the throttling unit; or, the on / off valve is located between the first end of the indoor heat exchanger and the throttling unit.

[0009] The above technical solution has the following advantages or beneficial effects: When the compressor is running normally, the on-off valve is in the open state, and the refrigerant can flow between the indoor heat exchanger and the outdoor heat exchanger through the on-off valve. The refrigerant can be throttled and cooled by the throttling unit to reduce the temperature of the refrigerant. When the compressor stops running, the on-off valve is in the closed state. The on-off valve can prevent the refrigerant from flowing between the indoor heat exchanger and the outdoor heat exchanger, which can prevent the refrigerant from flowing from the condenser on the high-pressure side to the evaporator on the low-pressure side. This can prevent refrigerant migration from causing excessive energy loss during compressor start-up and operation, which is conducive to improving the energy efficiency of the air conditioner.

[0010] According to some embodiments of the present invention, the air conditioner further includes: an exhaust pipe, the exhaust pipe being connected between the outlet of the compressor and the first interface, and the first one-way valve being disposed in the exhaust pipe and adjacent to the first interface.

[0011] The above technical solution has the following advantages or beneficial effects: This setting can create a longer buffer space between the first check valve and the compressor outlet, and the first check valve can be far away from the compressor outlet to ensure that a certain internal space is formed between the compressor outlet and the first check valve, which is beneficial to reduce the load when the compressor restarts.

[0012] According to some embodiments of the present invention, the throttling unit includes: a first throttling element, one end of which is connected to the first end of the indoor heat exchanger; a second throttling element, one end of which is connected to the other end of the first throttling element, and the other end of which is connected to the third end of the outdoor heat exchanger; and a second one-way valve, one end of which is connected to the other end of the first throttling element, and the other end of which is connected to the third end of the outdoor heat exchanger, wherein the second one-way valve only allows refrigerant to flow from the outdoor heat exchanger to the indoor heat exchanger.

[0013] The above technical solution has the following advantages or beneficial effects: When the air conditioner is in cooling mode, the on / off valve is in the open state, and the first throttling element can throttle and cool the refrigerant to improve the heat exchange efficiency of the refrigerant through the indoor heat exchanger and the indoor air; while when the air conditioner is in heating mode, the outdoor temperature is usually low. At this time, by throttling and cooling the refrigerant through the first and second throttling elements in sequence, the temperature of the refrigerant can be further reduced, so that the refrigerant can more fully absorb the heat of the outdoor air through the outdoor heat exchanger.

[0014] According to some embodiments of the present invention, the first throttling element is a capillary tube or a throttling valve; and the second throttling element is a capillary tube or a throttling valve.

[0015] The above technical solution has the following advantages or beneficial effects: by setting the first throttling element and the second throttling element as capillary tubes or throttling valves, the structure is simple and easy to install. Furthermore, the refrigerant flowing through can be throttled and depressurized through the capillary tubes or throttling valves, thereby increasing the cooling capacity of the refrigerant. This allows the refrigerant to absorb heat from the outside air more fully through the evaporator, resulting in higher heat exchange efficiency.

[0016] According to some embodiments of the present invention, the throttling unit includes: a third throttling element, one end of which is connected to the first end of the indoor heat exchanger, and the other end of which is connected to the third end of the outdoor heat exchanger.

[0017] The above technical solution has the following advantages or beneficial effects: that is, the throttling unit only has one third throttling element, which simplifies the structure of the throttling unit, facilitates installation and saves costs, and can use the third throttling element to throttle and cool the refrigerant flowing through it, so as to further reduce the temperature of the refrigerant and thus improve the heat exchange efficiency of the evaporator.

[0018] According to some embodiments of this utility model, the third throttling element is a capillary tube or a throttling valve.

[0019] The above technical solution has the following advantages or beneficial effects: by setting the third throttling element as a capillary tube or throttling valve, the structure of the third throttling element can be simplified and it is easy to install. Furthermore, the third throttling element can throttle and cool the refrigerant flowing through it, thereby increasing the cooling capacity of the refrigerant. This allows the refrigerant to absorb heat from the outside air more fully through the evaporator, resulting in higher heat exchange efficiency.

[0020] According to some embodiments of the present invention, the first one-way valve includes: a housing having an inlet and an outlet; a valve seat disposed within the housing and having a one-way channel communicating with the inlet and the outlet respectively; a magnetic ring connected to the valve seat and located within the one-way channel, the magnetic ring having a through hole at its center; and a magnetic diaphragm movably disposed within the one-way channel and located on the side of the magnetic ring facing the outlet, the magnetic diaphragm blocking the through hole when it abuts against the magnetic ring, thereby blocking the one-way channel.

[0021] The above technical solution has the following advantages or beneficial effects: When high-temperature and high-pressure refrigerant enters from the inlet of the first one-way valve, and the inlet pressure is greater than the sum of the outlet pressure, the pre-tightening force of the magnetic diaphragm, and the attraction between the magnetic diaphragm and the magnetic ring, the magnetic diaphragm can move along the axial direction of the first one-way valve towards the outlet under pressure. The magnetic diaphragm deforms under pressure, and the circumferential direction of the deformed magnetic diaphragm will separate from the valve seat sealing surface and form an annular or slit-like flow path. The refrigerant can flow to the outlet through the through hole of the magnetic ring and the gap between the magnetic diaphragm and the valve seat to achieve forward conduction. When the inlet pressure is less than the sum of the outlet pressure, the pre-tightening force of the magnetic diaphragm, and the attraction between the magnetic diaphragm and the magnetic ring, the pressure difference can cause the magnetic diaphragm to abut against the magnetic ring to block the through hole, thus achieving reverse shut-off.

[0022] According to some embodiments of the present invention, the inner wall of the one-way channel is constructed with an annular groove, the magnetic diaphragm is movably disposed in the annular groove and along the axial direction of the first one-way valve, the side of the annular groove adjacent to the magnetic ring is constructed as a first limiting surface, and the side of the annular groove adjacent to the outlet is constructed as a second limiting surface, the first limiting surface and the second limiting surface respectively stop and limit the magnetic diaphragm.

[0023] The above technical solution has the following advantages or beneficial effects: Thus, at the extreme position, the magnetic diaphragm can be stopped and limited by the second limiting surface or the first limiting surface to prevent the magnetic diaphragm from leaving the unidirectional channel, and the structural setting is more reasonable.

[0024] According to some embodiments of the present invention, the first one-way valve further includes a filter screen, which is disposed inside the housing and located on the side of the valve seat facing the inlet.

[0025] The above technical solution has the following advantages or beneficial effects: the filter screen can filter the refrigerant flowing in from the inlet, preventing impurities from entering the interior of the first one-way valve. This can prevent impurities in the refrigerant from remaining between the magnetic diaphragm and the valve seat to form a narrow gap, thereby improving the sealing between the magnetic diaphragm and the valve seat and preventing leakage of the first one-way valve.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1This is a schematic diagram of the first and second throttling elements of an air conditioner according to an embodiment of the present invention, which are capillary tubes. Figure 2 This is a schematic diagram of the first and second throttling elements of an air conditioner according to another embodiment of the present invention, which are capillary tubes. Figure 3 This is a schematic diagram of the first and second throttling elements of an air conditioner according to an embodiment of the present invention, which are throttling valves. Figure 4 This is a schematic diagram of the first and second throttling elements of an air conditioner according to another embodiment of the present invention, which are throttling valves. Figure 5 This is a schematic diagram of an air conditioner according to an embodiment of the present invention, where the throttling unit is a third throttling element; Figure 6 This is a schematic diagram of an air conditioner according to another embodiment of the present invention, wherein the throttling unit is a third throttling element; Figure 7 This is a schematic diagram illustrating the refrigerant flow principle during heating in an air conditioner according to an embodiment of the present invention. Figure 8 This is a schematic diagram illustrating the refrigerant flow principle during air conditioning cooling according to an embodiment of the present invention. Figure 9 This is a schematic diagram of the compressor according to an embodiment of the present utility model; Figure 10 This is a schematic diagram of the internal structure of the first check valve according to an embodiment of the present utility model.

[0028] Figure label: 100. Compressor; 110. Import; 120. Export; 200, Indoor heat exchanger; 210, First end; 220, Second end; 300, Outdoor heat exchanger; 310, Third end; 320, Fourth end; 400, Four-way valve; 410, First port; 420, Second port; 430, Third port; 440, Fourth port; 500, Throttling unit; 510, First throttling element; 520, Second throttling element; 530, Second check valve; 540, Third throttling element; 600, First one-way valve; 610, Housing; 611, Inlet; 612, Outlet; 620, Valve seat; 621, One-way passage; 622, Annular groove; 623, First limiting surface; 624, Second limiting surface; 630, Magnetic ring; 640, Magnetic diaphragm; 650, Filter screen; 700, On / off valve; 800, Exhaust pipe. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0032] In the description of this utility model, "multiple" means two or more, and "several" means one or more.

[0033] An air conditioner according to an embodiment of the present invention is described below with reference to the accompanying drawings.

[0034] like Figures 1-10 As shown, the air conditioner according to the embodiment of the present utility model may include a compressor 100, the compressor 100 having an inlet 110 and an outlet 120, the refrigerant in the compressor 100 can flow out through the outlet 120, and the refrigerant in the refrigerant circuit can flow back into the compressor 100 through the inlet 110.

[0035] An air conditioner may include an indoor heat exchanger 200, which has a first end 210 and a second end 220. The indoor heat exchanger 200 is used for heat exchange with indoor air. Thus, the refrigerant flowing through the indoor heat exchanger 200 can exchange heat with the indoor air through the indoor heat exchanger 200. The refrigerant can absorb heat from the indoor air through the indoor heat exchanger 200 to cool the room, or the refrigerant can release heat to the indoor air through the indoor heat exchanger 200 to heat the room.

[0036] The air conditioner may include an outdoor heat exchanger 300, which has a third end 310 and a fourth end 320. The outdoor heat exchanger 300 is used for heat exchange with outdoor air, and the third end 310 of the outdoor heat exchanger 300 is connected to the first end 210 of the indoor heat exchanger 200. In this way, the refrigerant can flow to the outdoor heat exchanger 300 after flowing through the indoor heat exchanger 200, or the refrigerant can flow to the indoor heat exchanger 200 after flowing through the outdoor heat exchanger 300. Furthermore, the refrigerant flowing through the outdoor heat exchanger 300 can exchange heat with the outdoor air through the outdoor heat exchanger 300. The refrigerant can absorb heat from the outdoor air through the outdoor heat exchanger 300, or the refrigerant can release heat to the outdoor air through the outdoor heat exchanger 300.

[0037] The air conditioner may include a four-way valve 400, which has a first port 410 connected to an outlet 120, through which refrigerant from the compressor 100 outlet 120 may flow to the first port 410.

[0038] Specifically, the four-way valve 400 has a second port 420, which is connected to the fourth end 320 of the outdoor heat exchanger 300. The refrigerant flowing out of the second port 420 can flow to the outdoor heat exchanger 300, or the refrigerant flowing out of the outdoor heat exchanger 300 can flow to the second port 420.

[0039] The four-way valve 400 has a third port 430, which is connected to the inlet 110. The refrigerant can flow through the third port 430 to the inlet 110 and then flow back into the compressor 100.

[0040] The four-way valve 400 has a fourth port 440, which is connected to the second end 220 of the indoor heat exchanger 200. The refrigerant flowing out of the fourth port 440 can flow to the indoor heat exchanger 200, or the refrigerant flowing out of the indoor heat exchanger 200 can flow to the fourth port 440.

[0041] The four-way valve 400 controls the connection between the first port 410 and the fourth port 440 and the second port 420 and the third port 430, or the four-way valve 400 controls the connection between the first port 410 and the second port 420 and the third port 430 and the fourth port 440.

[0042] In other words, the refrigerant flow direction can be changed by controlling the different port connections of the four-way valve 400. Specifically, when the air conditioner is in heating mode, the four-way valve 400 can control the connection of the first port 410 and the fourth port 440, and the connection of the second port 420 and the third port 430. In this way, the high-temperature refrigerant flowing out of the outlet 120 of the compressor 100 can flow to the indoor heat exchanger 200 through the first port 410 and the fourth port 440 of the four-way valve 400. At this time, the indoor heat exchanger 200 acts as a condenser, and the high-temperature refrigerant can release heat into the room through the indoor heat exchanger 200 to heat the room. Then, the cooled refrigerant can flow from the indoor heat exchanger 200 to the outdoor heat exchanger 300. The outdoor heat exchanger 300 acts as an evaporator, and the refrigerant can absorb heat from the outdoor air through the outdoor heat exchanger 300. Subsequently, it can flow to the inlet 110 through the second port 420 and the third port 430 of the four-way valve 400 to flow back to the compressor 100, realizing the heating cycle of the air conditioner.

[0043] When the air conditioner is in cooling mode, the four-way valve 400 can control the connection between the first port 410 and the second port 420, and the connection between the third port 430 and the fourth port 440. In this way, the high-temperature refrigerant flowing out of the outlet 120 of the compressor 100 can flow to the outdoor heat exchanger 300 through the first port 410 and the second port 420 of the four-way valve 400. At this time, the outdoor heat exchanger 300 acts as a condenser, and the high-temperature refrigerant can release heat to the outdoor air through the outdoor heat exchanger 300 to cool down. Then, the cooled refrigerant can flow from the outdoor heat exchanger 300 to the indoor heat exchanger 200. The indoor heat exchanger 200 acts as an evaporator, and the refrigerant can absorb heat from the indoor air through the indoor heat exchanger 200 to cool down the room. Then, the refrigerant can flow to the inlet 110 through the fourth port 440 and the third port 430 of the four-way valve 400 to flow back to the compressor 100, realizing the cooling cycle of the air conditioner.

[0044] The air conditioner may also include a throttling unit 500, one end of which is connected to the third end 310 of the outdoor heat exchanger 300, and the other end of which is connected to the first end 210 of the indoor heat exchanger 200.

[0045] The throttling unit 500 can throttle and cool the refrigerant flowing through it, thereby further reducing the temperature of the refrigerant and increasing its cooling capacity. This improves the heat exchange efficiency of the indoor heat exchanger 200 or the outdoor heat exchanger 300 when the refrigerant flows through them.

[0046] The air conditioner may also include a first one-way valve 600, one end of which is connected to the outlet 120 of the compressor 100, and the other end of which is connected to the first port 410 of the four-way valve 400. The first one-way valve 600 only allows refrigerant to flow from the outlet 120 of the compressor 100 to the first port 410 of the four-way valve 400.

[0047] With this configuration, when the compressor 100 stops, the first one-way valve 600 can prevent refrigerant from flowing back from the condenser to the compressor 100, so as to avoid a large amount of refrigerant flowing back into the compressor 100 from the outlet 120. In this way, when the compressor 100 restarts, the output power of the compressor 100 can be reduced.

[0048] The air conditioner may also include an on / off valve 700, which is connected between the third end 310 of the outdoor heat exchanger 300 and the first end 210 of the indoor heat exchanger 200, and the on / off valve 700 is connected in series with the throttling unit 500.

[0049] For example, the on / off valve 700 can be a solenoid valve, but is not limited to this. When the air conditioner is in heating mode, the indoor heat exchanger 200 acts as the condenser and the outdoor heat exchanger 300 acts as the evaporator. When the compressor 100 is running, the on-off valve 700 is open, allowing refrigerant to flow from the indoor heat exchanger 200 to the outdoor heat exchanger 300. When the compressor 100 is off, the on-off valve 700 is closed, and there is no refrigerant flow between the outdoor heat exchanger 300 and the indoor heat exchanger 200. When the air conditioner is in cooling mode, the outdoor heat exchanger 300 acts as the condenser and the indoor heat exchanger 200 acts as the evaporator. When the compressor 100 is running, the on-off valve 700 is open, allowing refrigerant to flow from the outdoor heat exchanger 300 to the indoor heat exchanger 200. When the compressor 100 is off, the on-off valve 700 is closed, and there is no refrigerant flow between the outdoor heat exchanger 300 and the indoor heat exchanger 200.

[0050] Furthermore, when the compressor 100 stops, the on / off valve 700 can close instantaneously. This prevents refrigerant from flowing from the high-pressure side condenser to the low-pressure side evaporator at the moment the compressor 100 stops. Thus, by combining the first one-way valve 600 and the on / off valve 700, the high-pressure refrigerant can be sealed in the condenser, preventing it from flowing to the low-pressure side evaporator under the pressure difference. That is, when the compressor 100 stops, there is no refrigerant flow between the condenser, evaporator, and compressor. The refrigerant in the condenser can maintain a high-pressure state, and the refrigerant in the evaporator can maintain a low-pressure state. This ensures that the distribution of refrigerant when the compressor 100 stops is consistent with the distribution when the compressor 100 is running stably. As a result, when the compressor 100 restarts, the amount of refrigerant in the compressor 100 will not be excessive. The compressor 100 can quickly respond to heat exchange in the air conditioning system with a lower output power, thereby reducing the compressor's energy consumption and improving the seasonal energy efficiency ratio of the air conditioner.

[0051] Thus, according to the present invention, when the compressor 100 is stopped, the air conditioner can use the first one-way valve 600 and the on / off valve 700 to seal the refrigerant in the condenser, so as to prevent the refrigerant from flowing from the condenser to the evaporator or back to the compressor 100, which is beneficial to reduce the power and energy consumption of the compressor 100 and facilitates the restart of the compressor 100.

[0052] In some specific embodiments of this utility model, such as Figures 1-4 As shown, the on / off valve 700 is located between the third end 310 of the outdoor heat exchanger 300 and the throttling unit 500.

[0053] Alternatively, the on / off valve 700 is located between the first end 210 of the indoor heat exchanger 200 and the throttling unit 500.

[0054] It is understandable that the on / off valve 700 is used to control the refrigerant flow between the indoor heat exchanger 200 and the outdoor heat exchanger 300. By changing the relative positions of the on / off valve 700 and the throttling unit 500, the function of the on / off valve 700 or the throttling unit will not be affected. Therefore, both of the above settings are feasible solutions, and the specific arrangement can be flexibly set according to the structure of the air conditioner.

[0055] When the compressor 100 is operating normally, the on-off valve 700 is in the open state, allowing the refrigerant to flow smoothly between the indoor heat exchanger 200 and the outdoor heat exchanger 300. When the refrigerant flows through the throttling unit 500, it is throttled and cooled, thus lowering its temperature and improving the heat exchange efficiency between the refrigerant and the air as it flows through the indoor or outdoor heat exchanger 200. When the compressor 100 stops operating, the on-off valve 700 is in the closed state, preventing the refrigerant from flowing between the indoor and outdoor heat exchangers 200 and 300. This prevents the refrigerant from flowing from the high-pressure condenser to the low-pressure evaporator, thus avoiding excessive energy loss during compressor startup caused by refrigerant migration and improving the air conditioner's energy efficiency.

[0056] Among them, the on / off valve 700 can be a solenoid valve. When the solenoid valve coil is energized, the solenoid valve is in the open state, and when the solenoid valve coil is de-energized, the solenoid valve is in the closed state. Furthermore, the de-energization action of the solenoid valve coil follows the following control logic: When the air conditioner is cooling, the external plate temperature represents the level of condensing pressure. When the external plate temperature is >58℃, the solenoid valve coil is de-energized 5 seconds after the compressor 100 stops running; when the external plate temperature is 50℃ <58℃, the solenoid valve coil is de-energized 2 seconds after the compressor 100 stops running; when the external plate temperature is ≤50℃, the solenoid valve coil is de-energized synchronously with the compressor 100 stopping running.

[0057] When the air conditioner is heating, the inner panel temperature represents the level of condensing pressure. When the inner panel temperature is >58℃, the solenoid valve coil is de-energized 5 seconds after the compressor 100 stops running; when the inner panel temperature is 50℃ <58℃, the solenoid valve coil is de-energized 2 seconds after the compressor 100 stops running; when the inner panel temperature is ≤50℃, the solenoid valve coil is de-energized synchronously with the compressor 100 stopping running.

[0058] In some specific embodiments of this utility model, such as Figure 1 and Figure 9 As shown, the air conditioner may also include an exhaust pipe 800, which is connected between the outlet 120 of the compressor 100 and the first interface 410. A first one-way valve 600 is provided in the exhaust pipe 800 and adjacent to the first interface 410.

[0059] In other words, the first check valve 600 is located between and adjacent to the four-way valve 400 and the compressor 100. This arrangement allows for a longer buffer space between the first check valve 600 and the outlet 120 of the compressor 100. The first check valve 600 can be located away from the outlet 120 of the compressor 100 to ensure that a certain internal space is formed between the outlet 120 of the compressor 100 and the first check valve 600, which helps to reduce the load when the compressor 100 is restarted.

[0060] In some specific embodiments of this utility model, such as Figures 1-4 As shown, the throttling unit 500 may include a first throttling element 510, one end of which is connected to the first end 210 of the indoor heat exchanger 200.

[0061] The throttling unit 500 may include a second throttling element 520, one end of which is connected to the other end of the first throttling element 510, and the other end of which is connected to the third end 310 of the outdoor heat exchanger 300.

[0062] The throttling unit 500 may include a second one-way valve 530, one end of which is connected to the other end of the first throttling element 510, and the other end of which is connected to the third end 310 of the outdoor heat exchanger 300. The second one-way valve 530 only allows refrigerant to flow from the outdoor heat exchanger 300 to the indoor heat exchanger 200.

[0063] In other words, the second throttling element 520 can be connected in parallel with the second one-way valve 530 and then connected in series with the first throttling element 510.

[0064] like Figure 1 and Figure 3As shown, when the on-off valve 700 is located between the throttling unit 500 and the outdoor heat exchanger 300, one end of the on-off valve 700 is connected to the second one-way valve 530 and the second throttling element 520, respectively, and the other end of the on-off valve 700 can be connected to the third end 310 of the outdoor heat exchanger 300. Thus, when the air conditioner is in cooling mode, the refrigerant flowing from the outdoor heat exchanger 300 can flow sequentially through the on-off valve 700, the second one-way valve 530, and the first throttling element 510 before flowing to the indoor heat exchanger 200. The first throttling element 510 can throttle and cool the refrigerant to improve refrigerant flow. The heat exchange efficiency between the indoor heat exchanger 200 and the indoor air is considered. When the air conditioner is in heating mode, the refrigerant flowing out of the indoor heat exchanger 200 can flow sequentially through the first throttling element 510, the second throttling element 520, and the on / off valve 700 before flowing to the outdoor heat exchanger 300. It can be understood that when the air conditioner is running in heating mode, the outdoor temperature is usually low. At this time, by throttling and cooling the refrigerant through the first throttling element 510 and the second throttling element 520, the temperature of the refrigerant can be further reduced, so that the refrigerant can more fully absorb the heat of the outdoor air through the outdoor heat exchanger 300.

[0065] like Figure 2 and Figure 4 As shown, when the on / off valve 700 is located between the throttling unit 500 and the indoor heat exchanger 200, one end of the on / off valve 700 can be connected to the first end 210 of the indoor heat exchanger 200, and the other end of the on / off valve 700 can be connected to the first throttling element 510. When the air conditioner is in cooling mode, the refrigerant flowing out of the outdoor heat exchanger 300 can flow sequentially through the second one-way valve 530, the first throttling element 510, and the on / off valve 700 before flowing into the indoor heat exchanger 200. The first throttling element 510 can throttle and cool the refrigerant to improve the refrigerant's passage through the indoor heat exchanger. The heat exchange efficiency between the indoor heat exchanger 200 and the indoor air; when the air conditioner is in heating mode, the refrigerant flowing out from the indoor heat exchanger 200 can flow sequentially through the on / off valve 700, the first throttling element 510 and the second throttling element 520 to the outdoor heat exchanger 300. It can be understood that when the air conditioner is running in heating mode, the outdoor temperature is usually low. At this time, by throttling and cooling the refrigerant through the first throttling element 510 and the second throttling element 520, the temperature of the refrigerant can be further reduced, so that the refrigerant can more fully absorb the heat of the outdoor air through the outdoor heat exchanger 300.

[0066] In some specific embodiments of this utility model, the first throttling element 510 is a capillary tube or a throttling valve, and the second throttling element 520 is a capillary tube or a throttling valve.

[0067] For example, such as Figure 1 and Figure 3 As shown, the first throttling element 510 and the second throttling element 520 can be capillaries; or, as... Figure 2 and Figure 4 As shown, the first throttling element 510 and the second throttling element 520 can be throttling valves. The throttling valve can be an electronic expansion valve.

[0068] By setting the first throttling element 510 and the second throttling element 520 as capillary tubes or throttling valves, the structure is simple and easy to install. The refrigerant flowing through can be throttled and depressurized through the capillary tubes or throttling valves, thereby increasing the cooling capacity of the refrigerant. This allows the refrigerant to absorb heat from the outside air more fully through the evaporator, resulting in higher heat exchange efficiency.

[0069] In other specific embodiments of this utility model, such as Figure 5 and Figure 6 As shown, the throttling unit 500 may include a third throttling element 540, one end of which is connected to the first end 210 of the indoor heat exchanger 200, and the other end of which is connected to the third end 310 of the outdoor heat exchanger 300.

[0070] That is, the throttling unit 500 has only one third throttling element 540. The third throttling element 540 is connected in series with the on / off valve 700 and is located between the indoor heat exchanger 200 and the outdoor heat exchanger 300. This simplifies the structure of the throttling unit 500, makes it easier to install and saves costs. Furthermore, the third throttling element 540 can be used to throttle and cool the refrigerant flowing through it, thereby further reducing the temperature of the refrigerant and improving the heat exchange efficiency of the evaporator.

[0071] Furthermore, such as Figure 5 and Figure 6 As shown, the third throttling element 540 is a capillary tube or a throttling valve. The throttling valve can be an electronic expansion valve.

[0072] By setting the third throttling element 540 as a capillary tube or a throttling valve, the structure of the third throttling element 540 can be simplified and it is easier to install. Furthermore, the third throttling element 540 can throttle and cool the refrigerant flowing through it, thereby increasing the cooling capacity of the refrigerant. This allows the refrigerant to absorb heat from the outside air more fully through the evaporator, resulting in higher heat exchange efficiency.

[0073] In some specific embodiments of this utility model, such as Figure 10 As shown, the first check valve 600 may include a housing 610, which has an inlet 611 and an outlet 612. Refrigerant can enter the first check valve 600 through the inlet 611 and exit the first check valve 600 through the outlet 612.

[0074] The first one-way valve 600 may include a valve seat 620, which is disposed within the housing 610 and has a one-way channel 621 connected to an inlet 611 and an outlet 612. Refrigerant flowing into the first one-way valve 600 from the inlet 611 can flow along the one-way channel 621 to the outlet 612 and exit the first one-way valve 600 through the outlet 612.

[0075] The first one-way valve 600 may include a magnetic ring 630, which is connected to the valve seat 620 and located in the one-way channel 621. The magnetic ring 630 has a through hole at its center (not shown in the figure).

[0076] The first one-way valve 600 may include a magnetic diaphragm 640, which is movably disposed in the one-way channel 621 and located on the side of the magnetic ring 630 facing the outlet 612. When the magnetic diaphragm 640 abuts against the magnetic ring 630, it blocks the through hole to block the one-way channel 621.

[0077] For example, the magnetic diaphragm 640 can be a metal diaphragm, allowing it to be magnetically connected to the magnetic ring 630 to seal the through-hole of the magnetic ring 630. Furthermore, it is understood that the first one-way valve 600 is located between the outlet 120 of the compressor 100 and the four-way valve 400. The refrigerant flowing from the outlet 120 of the compressor 100 is under high temperature and pressure; tests have shown that the refrigerant flowing from the outlet 120 of the compressor 100 can reach 110°C. By constructing the magnetic diaphragm 640 as a metal diaphragm, deformation of the magnetic diaphragm 640 due to high temperature can be prevented when the high-temperature, high-pressure refrigerant flows through the first one-way valve 600, thus ensuring the internal sealing of the first one-way valve 600.

[0078] Specifically, when high-temperature and high-pressure refrigerant enters from the inlet 611 of the first one-way valve 600, and the pressure at the inlet 611 is greater than the pressure at the outlet 612, the pre-tightening force of the magnetic diaphragm 640, and the sum of the attraction between the magnetic diaphragm 640 and the magnetic ring 630, the magnetic diaphragm 640 can move along the axial direction of the first one-way valve 600 towards the outlet 612 under pressure. The magnetic diaphragm 640 deforms under pressure, and the circumferential direction of the deformed magnetic diaphragm 640 will separate from the sealing surface of the valve seat 620 and form an annular or slit-like flow path. The refrigerant can flow to the outlet 612 through the through hole of the magnetic ring 630 and the gap between the magnetic diaphragm 640 and the valve seat 620, so as to realize the one-way flow of refrigerant from the outlet 120 of the compressor 100 to the first interface 410 of the four-way valve 400, thus achieving forward conduction.

[0079] When the pressure at the inlet 611 is less than the pressure at the outlet 612, the pre-tightening force of the magnetic diaphragm 640, and the attraction between the magnetic diaphragm 640 and the magnetic ring 630, the magnetic diaphragm 640 can be stopped by the magnetic ring 630 under the action of the pressure difference to block the through hole. This can prevent the refrigerant from flowing from the outlet 612 to the inlet 611 along the one-way channel 621, so as to achieve reverse cut-off.

[0080] Furthermore, such as Figure 10 As shown, the inner wall of the one-way channel 621 is constructed with an annular groove 622. The magnetic diaphragm 640 is movably disposed in the annular groove 622. Along the axial direction of the first one-way valve 600, the side of the annular groove 622 adjacent to the magnetic ring 630 is constructed as a first limiting surface 623, and the side of the annular groove 622 adjacent to the outlet 612 is constructed as a second limiting surface 624. The first limiting surface 623 and the second limiting surface 624 respectively stop and limit the magnetic diaphragm 640.

[0081] Therefore, when the pressure at the inlet 611 is greater than the pressure at the outlet 612, the pre-tightening force of the magnetic diaphragm 640, and the attraction between the magnetic diaphragm 640 and the magnetic ring 630, the magnetic diaphragm 640 can move axially towards the outlet 612 within the annular groove 622 under pressure. At its extreme position, the magnetic diaphragm 640 can be stopped and limited by the second limiting surface 624 to prevent it from detaching from the one-way channel 621. Conversely, when the pressure at the inlet 611 is less than the pressure at the outlet 612, the pre-tightening force of the magnetic diaphragm 640, and the attraction between the magnetic diaphragm 640 and the magnetic ring 630, the magnetic diaphragm 640 can move axially towards the inlet 611 within the annular groove 622. At its extreme position, the magnetic diaphragm 640 can be stopped and limited by the first limiting surface 623 to prevent it from detaching from the one-way channel 621. This structural design is more reasonable.

[0082] In some specific embodiments of this utility model, such as Figure 10 As shown, the first one-way valve 600 may also include a filter screen 650, which is disposed inside the housing 610 and is located on the side of the valve seat 620 facing the inlet 611.

[0083] Therefore, the filter 650 can filter the refrigerant flowing in from the inlet 611, preventing impurities from entering the interior of the first one-way valve 600. This avoids impurities in the refrigerant remaining between the magnetic diaphragm 640 and the valve seat 620 to form a narrow gap, thereby improving the sealing between the magnetic diaphragm 640 and the valve seat 620 and preventing leakage from the first one-way valve 600.

[0084] Other components and operations of the air conditioner according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0085] The air conditioner of this invention performs a refrigeration cycle by using a compressor 100, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the conditioned and heat-exchanged air.

[0086] The compressor 100 compresses the refrigerant gas under high temperature and high pressure and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and the heat is released to the surrounding environment through the condensation process.

[0087] The expansion valve expands the high-temperature, high-pressure liquid refrigerant condensed in the condenser into a low-pressure liquid refrigerant. The evaporator evaporates the expanded refrigerant in the expansion valve and returns the low-temperature, low-pressure refrigerant gas to the compressor 100. The evaporator achieves a cooling effect by utilizing the latent heat of refrigerant evaporation to exchange heat with the material being cooled. Throughout the cycle, the air conditioner regulates the temperature and humidity of the indoor space.

[0088] In the description of this specification, references to terms such as "specific embodiment" and "specific example" refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example that is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0089] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air conditioner, comprising: The compressor has an inlet and an outlet; An indoor heat exchanger having a first end and a second end, the indoor heat exchanger being used for heat exchange with indoor air; An outdoor heat exchanger having a third end and a fourth end, the outdoor heat exchanger being used for heat exchange with outdoor air, and the third end of the outdoor heat exchanger being connected to the first end of the indoor heat exchanger. A four-way valve, wherein the four-way valve has: A first interface, which is connected to the outlet; The second interface is connected to the fourth end of the outdoor heat exchanger; A third interface, which is connected to the inlet; The fourth interface is connected to the second end of the indoor heat exchanger. The four-way valve controls the first interface to be connected to the fourth interface and the second interface to be connected to the third interface, or the four-way valve controls the first interface to be connected to the second interface and the third interface to be connected to the fourth interface. Its features are, The air conditioner also includes: A throttling unit, one end of which is connected to the third end of the outdoor heat exchanger, and the other end of which is connected to the first end of the indoor heat exchanger; in, The air conditioner also includes: A first one-way valve, one end of which is connected to the outlet of the compressor, and the other end of which is connected to the first port of the four-way valve, the first one-way valve only allows refrigerant to flow from the outlet of the compressor to the first port of the four-way valve; An on / off valve is connected between the third end of the outdoor heat exchanger and the first end of the indoor heat exchanger, and the on / off valve is connected in series with the throttling unit.

2. The air conditioner according to claim 1, characterized in that, The on / off valve is located between the third end of the outdoor heat exchanger and the throttling unit; or... The on / off valve is located between the first end of the indoor heat exchanger and the throttling unit.

3. The air conditioner according to claim 1, characterized in that, Also includes: An exhaust pipe is provided between the outlet of the compressor and the first interface, and a first one-way valve is provided in the exhaust pipe and adjacent to the first interface.

4. The air conditioner according to claim 1, characterized in that, The throttling unit includes: A first throttling element, one end of which is connected to the first end of the indoor heat exchanger; The second throttling element has one end connected to the other end of the first throttling element, and the other end of the second throttling element is connected to the third end of the outdoor heat exchanger. A second one-way valve is provided, with one end of the second one-way valve connected to the other end of the first throttling element and the other end of the second one-way valve connected to the third end of the outdoor heat exchanger. The second one-way valve only allows refrigerant to flow from the outdoor heat exchanger to the indoor heat exchanger.

5. The air conditioner according to claim 4, characterized in that, The first throttling element is a capillary tube or a throttling valve; and, The second throttling element is a capillary tube or a throttling valve.

6. The air conditioner according to claim 1, characterized in that, The throttling unit includes: The third throttling element has one end connected to the first end of the indoor heat exchanger and the other end connected to the third end of the outdoor heat exchanger.

7. The air conditioner according to claim 6, characterized in that, The third throttling element is a capillary tube or a throttling valve.

8. The air conditioner according to claim 1, characterized in that, The first check valve includes: A housing, wherein the housing is provided with an inlet and an outlet; A valve seat is disposed within the housing and has a one-way channel that is connected to the inlet and the outlet respectively. A magnetic ring, which is connected to the valve seat and located within the one-way channel, has a through hole at its center; A magnetic diaphragm is movably disposed within the one-way channel and located on the side of the magnetic ring facing the outlet. When the magnetic diaphragm abuts against the magnetic ring, it blocks the through hole to seal the one-way channel.

9. The air conditioner according to claim 8, characterized in that, The inner wall of the one-way channel is constructed with an annular groove. The magnetic diaphragm is movably disposed in the annular groove and along the axial direction of the first one-way valve. The side of the annular groove adjacent to the magnetic ring is constructed as a first limiting surface, and the side of the annular groove adjacent to the outlet is constructed as a second limiting surface. The first limiting surface and the second limiting surface respectively stop and limit the magnetic diaphragm.

10. The air conditioner according to claim 8, characterized in that, The first check valve further includes: A filter screen is disposed inside the housing and is located on the side of the valve seat facing the inlet.

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