Air conditioner

Abstract

The utility model relates to an air conditioner, which belongs to the technical field of air conditioners and comprises an indoor heat exchanger, a thermostatic expansion valve, an outdoor heat exchanger, a first three-way pipe and a second three-way pipe, the thermostatic expansion valve is communicated with the indoor heat exchanger, the first three-way pipe is provided with a first connector, a second connector and a third connector, and the second connector is communicated with the thermostatic expansion valve. The second three-way pipe is provided with a fourth connector, a fifth connector and a sixth connector, the fourth connector communicates with the third connector, the fifth connector communicates with the outdoor heat exchanger, and the sixth connector communicates with the first connector; the one-way valve is used for conducting the refrigerant to flow from the sixth connector to the first connector; the first three-way pipe and the second three-way pipe are arranged in parallel, the two ends of the electronic expansion valve are connected with one end of the first three-way pipe and one end of the second three-way pipe respectively, and the two ends of the one-way valve are connected with the other end of the first three-way pipe and the other end of the second three-way pipe respectively. And the compact design of the pipeline is realized.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioners, and in particular to an air conditioner. Background Art

[0002] Air conditioning, or air conditioner, refers to a device that uses artificial means to adjust and control the temperature, humidity, flow rate and other parameters of the ambient air in a building or structure.

[0003] The indoor unit of the air-conditioning system in North America can usually be matched with the outdoor unit of different brands, commonly known as a replacement unit. The indoor unit is an American duct unit, which consists of a box body, evaporator components, and wind wheel components.

[0004] At present, American duct air conditioners are equipped with a thermal expansion valve at the inlet of the evaporator, which is used to adjust the liquid supply to the indoor evaporator of the air conditioner. Due to its structure and the characteristics of the temperature-sensing package, the thermal expansion valve has no function of adjusting the amount of refrigerant when the air conditioner heating valve body is fully opened. At this time, the electronic expansion valve of the outdoor unit is required to adjust the liquid supply. The electronic expansion valve is connected by a pipeline to realize the heating and liquid supply adjustment of the outdoor unit electronic expansion valve. However, the pipeline connection form in the prior art is complicated and occupies a large space. Utility Model Content

[0005] The utility model solves one of the technical problems in the related art at least to a certain extent.

[0006] To this end, the present application aims to provide an air conditioner, in which a first three-way pipe and a second three-way pipe are arranged in parallel, the two ends of the electronic expansion valve are respectively connected to one end of the first three-way pipe and one end of the second three-way pipe, and the two ends of the one-way valve are respectively connected to the other end of the first three-way pipe and the other end of the second three-way pipe. The pipeline is simple and the space utilization rate of the box is improved.

[0007] In order to achieve the above object, the utility model provides an air conditioner, comprising:

[0008] Indoor heat exchanger;

[0009] A thermal expansion valve, which is arranged indoors and communicated with the indoor heat exchanger;

[0010] Outdoor heat exchanger;

[0011] A compressor having an air intake port and an air discharge port;

[0012] A four-way valve, wherein the four-way valve is respectively connected to the air intake port, the air exhaust port, the indoor heat exchanger and the outdoor heat exchanger;

[0013] A first three-way pipe, wherein the first three-way pipe has a first interface, a second interface and a third interface, and the second interface is connected to the thermal expansion valve;

[0014] A second three-way pipe, wherein the second three-way pipe has a fourth interface, a fifth interface and a sixth interface, the fourth interface is connected to the third interface, the fifth interface is connected to the outdoor heat exchanger, and the sixth interface is connected to the first interface;

[0015] a one-way valve, the one-way valve being used to conduct the refrigerant to flow from the sixth interface to the first interface;

[0016] Controller;

[0017] An electronic expansion valve, the electronic expansion valve is electrically connected to the controller, two ends of the electronic expansion valve are respectively connected to the third interface and the fourth interface, and the controller is used to control the opening of the electronic expansion valve;

[0018] a first refrigerant circuit, wherein the first refrigerant circuit is sequentially connected to the compressor, the four-way valve, the indoor heat exchanger, the fifth interface, the sixth interface, the first interface, the second interface, the thermal expansion valve, and the indoor heat exchanger;

[0019] A second refrigerant circuit, wherein the second refrigerant circuit is sequentially connected to the compressor, the four-way valve, the indoor heat exchanger, the thermal expansion valve, the second interface, the third interface, the electronic expansion valve, the fourth interface, the fifth interface, and the outdoor heat exchanger;

[0020] The electronic expansion valve is in a closed state, the refrigerant flows along the first refrigerant circuit, and the thermal expansion valve adjusts the supply amount of the refrigerant;

[0021] The electronic expansion valve is in an open state, and when the refrigerant flows along the second refrigerant circuit, the electronic expansion valve adjusts the liquid supply of the refrigerant.

[0022] In the technical solution, the first three-way pipe and the second three-way pipe are arranged in parallel, the two ends of the electronic expansion valve are respectively connected to one end of the first three-way pipe and one end of the second three-way pipe, and the two ends of the one-way valve are respectively connected to the other end of the first three-way pipe and the other end of the second three-way pipe. The pipeline is simple, which can effectively reduce the pipeline, low cost, and improve the space utilization rate of the box.

[0023] In addition, the present application also provides an air conditioner, which includes:

[0024] A thermal expansion valve, wherein the thermal expansion valve is arranged indoors;

[0025] An indoor heat exchanger, the indoor heat exchanger is arranged indoors and is connected to the thermal expansion valve;

[0026] An outdoor heat exchanger, wherein the outdoor heat exchanger is arranged outdoors;

[0027] A compressor having an air intake port and an air discharge port;

[0028] A four-way valve, wherein the four-way valve is respectively connected to the air intake port, the air exhaust port, the indoor heat exchanger and the outdoor heat exchanger;

[0029] A first three-way pipe, wherein the first three-way pipe has a first interface, a second interface and a third interface, and the second interface is connected to the thermal expansion valve;

[0030] A second three-way pipe, wherein the second three-way pipe has a fourth interface, a fifth interface and a sixth interface, the fourth interface is connected to the third interface, the fifth interface is connected to the outdoor heat exchanger, and the sixth interface is connected to the first interface;

[0031] a one-way valve, the one-way valve being turned on when the refrigerant flows from the sixth interface to the first interface;

[0032] An electronic expansion valve, wherein two ends of the electronic expansion valve are respectively connected to the third interface and the fourth interface;

[0033] A controller, the controller is electrically connected to the electronic expansion valve, and the controller is used to control the opening of the electronic expansion valve;

[0034] The controller receives a refrigeration signal to control the electronic expansion valve to close, and the high-temperature and high-pressure gaseous refrigerant output by the compressor flows into the outdoor heat exchanger through the four-way valve, and the medium-temperature and high-pressure liquid refrigerant flowing out of the outdoor heat exchanger flows through the fifth interface, the sixth interface, the first interface, the second interface, the thermal expansion valve, and the indoor heat exchanger in sequence, and the low-temperature and low-pressure gaseous refrigerant flowing out of the indoor heat exchanger flows back to the compressor through the four-way valve;

[0035] The controller receives a refrigeration signal to control the opening of the electronic expansion valve. The high-temperature and high-pressure gaseous refrigerant output by the compressor flows into the indoor heat exchanger through the four-way valve. The medium-temperature and high-pressure liquid refrigerant flowing out of the indoor heat exchanger flows through the thermal expansion valve, the second interface, the third interface, the electronic expansion valve, the fourth interface, the fifth interface, and the outdoor heat exchanger in sequence. The low-temperature and low-pressure gaseous refrigerant flowing out of the outdoor heat exchange flows back to the compressor through the four-way valve, so that the electronic expansion valve can adjust the refrigerant liquid supply.

[0036] In the technical solution, the first three-way pipe and the second three-way pipe are arranged in parallel, the two ends of the electronic expansion valve are respectively connected to one end of the first three-way pipe and one end of the second three-way pipe, and the two ends of the one-way valve are respectively connected to the other end of the first three-way pipe and the other end of the second three-way pipe. The pipeline is simple, which can effectively reduce the pipeline, low cost, and improve the space utilization rate of the box.

[0037] Some embodiments of the present application further include a first branch pipe, wherein the first branch pipe is connected to the first interface and the sixth interface, and the one-way valve is arranged on the first branch pipe.

[0038] In some embodiments of the present application, a second branch pipe and a third branch pipe are further included, and both ends of the electronic expansion valve are respectively connected to one end of the second branch pipe and one end of the third branch pipe, the other end of the second branch pipe is connected to the fourth interface, and the other end of the third branch pipe is connected to the first interface.

[0039] In some embodiments of the present application, the second branch pipe is provided with a first filter, and the third branch pipe is provided with a second filter.

[0040] In some embodiments of the present application, a first stop valve is provided on the pipeline between the indoor heat exchanger and the four-way valve, and a second stop valve is provided on the pipeline between the indoor heat exchanger and the second interface.

[0041] In some embodiments of the present application, the four-way valve has a first port, a second port, a third port and a fourth port, the first port is connected to the exhaust port, the second port is connected to the outdoor heat exchanger, the third port is connected to the air intake port, and the fourth port is connected to the indoor heat exchanger;

[0042] When the electronic expansion valve is in a closed state, the first port is connected to the second port, and the third port is connected to the fourth port;

[0043] When the electronic expansion valve is in an open state, the first port is communicated with the fourth port, and the second port is communicated with the third port.

[0044] Some embodiments of the present application further include a gas-liquid separator having an inlet and an outlet, wherein the inlet is connected to the third port, and the outlet is connected to the air intake port.

[0045] In some embodiments of the present application, the third interface and the fourth interface are located at the same height, and the second interface and the fifth interface are located at the same height.

[0046] In some embodiments of the present application, when the electronic expansion valve is in an open state, the refrigerant flowing out of the fourth interface also flows to the first interface, and the refrigerant flowing out of the first interface flows back to the fourth interface via the third interface.

[0047] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a schematic diagram of a partial structure of a first three-way pipe of an air conditioner according to an embodiment of the present application;

[0049] Figure 2 is a partial structural exploded view of a first three-way pipe of an air conditioner according to an embodiment of the present application;

[0050] Figure 3 is a partial structural schematic diagram of the second three-way pipe of the air conditioner according to the embodiment of the present application;

[0051] Figure 4 is a schematic diagram of a partial structure of a one-way valve of an air conditioner according to an embodiment of the present application;

[0052] Figure 5 is a schematic diagram of a partial structure of an electronic expansion valve of an air conditioner according to an embodiment of the present application;

[0053] Figure 6 is a schematic diagram of the partial structure of the first branch of the air conditioner according to the implementation mode of the present application;

[0054] Figure 7 is a schematic diagram of the partial structure of the second branch pipe of the air conditioner according to the implementation mode of the present application;

[0055] Figure 8 It is a schematic diagram of local pipe connection at the first three-way pipe of the air conditioner according to the embodiment of the present application;

[0056] Fig. 9 is a schematic diagram of pipe connections of an air conditioner according to an embodiment of the present application;

[0057] Fig.10 is a schematic diagram of the flow direction of the refrigerant in the cooling mode of the air conditioner according to the embodiment of the present application;

[0058] Fig.11 It is a schematic diagram of the flow direction of the refrigerant in the heating mode of the air conditioner according to the embodiment of the present application.

[0059] In the above figures: 100, indoor heat exchanger; 200, thermal expansion valve; 300, outdoor heat exchanger; 400, compressor; 500, four-way valve; 600, first three-way pipe; 601, first interface; 602, second interface; 603, third interface; 700, second three-way pipe; 701, fourth interface; 702, fifth interface; 603, sixth interface; 800, one-way valve; 900, electronic expansion valve; 110, first branch pipe; 120, second branch pipe; 130, third branch pipe; 140, first filter; 150, second filter; 160, first stop valve; 170, second stop valve; 180, gas-liquid separator. DETAILED DESCRIPTION

[0060] In the description of the present invention, it needs to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0061] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] In the present utility model, unless otherwise clearly stipulated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0063] In the present utility model, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0064] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.

[0065] In the present application, the wall mounted air conditioner performs a refrigeration cycle of the air conditioner indoor unit by using a compressor, a condenser, an expansion valve and an indoor heat exchanger. The refrigeration cycle includes a series of processes involving compression, condensation, expansion and evaporation, and supplies refrigerant to the conditioned and heat exchanged air.

[0066] The compressor compresses the refrigerant gas at low temperature and low pressure and discharges the refrigerant gas at high temperature and high pressure. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into liquid phase, and the heat is released to the surrounding environment through the condensation process. The expansion valve expands the liquid phase refrigerant at high temperature and high pressure condensed in the condenser into a low pressure liquid phase refrigerant.

[0067] The indoor heat exchanger evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low temperature and low pressure state to the compressor. The indoor heat exchanger can achieve a refrigeration effect by utilizing the latent heat of evaporation of the refrigerant to exchange heat with the material to be cooled.

[0068] In the whole cycle, the air conditioner indoor unit can adjust the temperature of the indoor space. The outdoor unit of the air conditioner indoor unit refers to the part of the refrigeration cycle including the compressor and the outdoor heat exchanger, the indoor unit of the air conditioner indoor unit includes the indoor heat exchanger, and the expansion valve can be provided in the indoor unit or the outdoor unit.

[0069] The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an indoor heat exchanger. When the indoor heat exchanger functions as a condenser, the air conditioner indoor unit functions as a heater in a heating mode, and when the indoor heat exchanger functions as an indoor heat exchanger, the air conditioner indoor unit functions as a cooler in a cooling mode.

[0070] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0071] As attached Figures 1 to 3 As shown, in an illustrative embodiment of the air conditioner of the utility model, the air conditioner includes an indoor heat exchanger 100, and the indoor heat exchanger 100 performs heat exchange on the air passing through the indoor heat exchanger 100 to form a heat exchange airflow.

[0072] The air conditioner includes a thermal expansion valve 200 . The thermal expansion valve 200 is disposed indoors. The thermal expansion valve 200 is connected to the indoor heat exchanger 100 .

[0073] The air conditioner includes an outdoor heat exchanger 300, which condenses the compressed refrigerant into a liquid phase, and releases heat to the surrounding environment through the condensation process.

[0074] The air conditioner includes a compressor 400 having an air intake port and an air discharge port. The compressor 400 is used to compress low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharge it to a condenser.

[0075] The air conditioner includes a four-way valve 500, which is respectively connected to the air intake port, the air exhaust port, the indoor heat exchanger 100 and the outdoor heat exchanger 300. The four-way valve 500 is used to control the flow direction of the refrigerant so that the outdoor heat exchanger 300 and the indoor heat exchanger 100 can be switched between serving as a condenser and an evaporator.

[0076] The air conditioner includes a first three-way pipe 600 . The first three-way pipe 600 has a first interface 601 , a second interface 602 and a third interface 603 . The second interface 602 is connected to the thermal expansion valve 200 .

[0077] The air conditioner includes a second three-way pipe 700 , which has a fourth interface 701 , a fifth interface 702 and a sixth interface 603 . The fourth interface 701 is connected to the third interface 603 , the fifth interface 702 is connected to the outdoor heat exchanger 300 , and the sixth interface 603 is connected to the first interface 601 .

[0078] The air conditioner includes a one-way valve 800 , which is used to conduct the refrigerant from the sixth interface 603 to the first interface 601 .

[0079] The air conditioner includes a controller, which is the central control element of the air conditioner and can receive and transmit electrical signals.

[0080] The air conditioner includes an electronic expansion valve 900, which is electrically connected to a controller. The electronic expansion valve 900 is disposed on a pipeline between the third interface 603 and the fourth interface 701. The controller is used to control the opening of the electronic expansion valve 900, thereby forming a cooling circulation loop for the flow of refrigerant.

[0081] The air conditioner includes a first refrigerant circuit, which is sequentially connected to the compressor 400, the four-way valve 500, the indoor heat exchanger 100, the fifth interface 702, the sixth interface 603, the first interface 601, the second interface 602, the thermal expansion valve 200, and the indoor heat exchanger 100.

[0082] The air conditioner includes a second refrigerant circuit, which is connected in sequence to the compressor 400, the four-way valve 500, the indoor heat exchanger 100, the thermal expansion valve 200, the second interface 602, the third interface 603, the electronic expansion valve 900, the fourth interface 701, the fifth interface 702, and the outdoor heat exchanger 300.

[0083] The electronic expansion valve 900 is in a closed state, the refrigerant flows along the first refrigerant circuit, and the thermal expansion valve 200 adjusts the supply amount of the refrigerant.

[0084] The electronic expansion valve 900 is in an open state. When the refrigerant flows along the second refrigerant circuit, the electronic expansion valve 900 adjusts the supply amount of the refrigerant.

[0085] Through the above technical solution, the first three-way pipe 600 and the second three-way pipe 700 are arranged in parallel, the two ends of the electronic expansion valve 900 are respectively connected to one end of the first three-way pipe 600 and one end of the second three-way pipe 700, and the two ends of the one-way valve 800 are respectively connected to the other end of the first three-way pipe 600 and the other end of the second three-way pipe 700. The pipeline is simple and low in cost, which improves the space utilization of the box, optimizes the internal pipeline structure of the box, saves pipeline space, reduces the difficulty of pipeline design, and realizes compact pipeline design.

[0086] The first three-way pipe 600 and the second three-way pipe 700 are arranged in parallel, which can not only ensure the fluidity of the refrigerant in the air conditioner, but also ensure that the thermal expansion valve 200 or the electronic expansion valve 900 can throttle and reduce the pressure of the refrigerant in the air conditioner when the air conditioner is running different functions, thereby improving the normal operation of the air conditioner and improving the working reliability of the air conditioner.

[0087] The electronic expansion valve 900 adjusts the refrigerant supply during the heating process of the air conditioner. It does not throttle during the cooling process of the air conditioner and does not affect the flow of the refrigerant, thereby realizing the different functions of the electronic expansion valve 900 in cooling and heating. The electronic expansion valve 900 has a wide adjustment range and a fast adjustment speed, thereby reducing the energy consumption of the system.

[0088] As attached Figures 4 to 7 As shown, in some embodiments, the air conditioner may include a first branch pipe 110 , the first branch pipe 110 is connected to the first interface 601 and the sixth interface 603 , and the one-way valve 800 is disposed on the first branch pipe 110 .

[0089] In some embodiments, the first branch pipe 110 is a U-shaped pipe, one end of the first branch pipe 110 is connected to the first interface 601 , and the other end of the first branch pipe 110 is connected to the sixth interface 603 .

[0090] In some embodiments, the first tube is a straight tube, one end of which is connected to the first interface 601, and the other end of which is connected to the sixth interface 603. The straight tube is short, thus saving pipeline space.

[0091] In some embodiments, one end of the one-way valve 800 is directly connected to the first interface 601, and the other end of the one-way valve 800 is directly connected to the sixth interface 603. The one-way valve 800 installed in this way can both limit the flow direction of the refrigerant and keep the pipeline tidy.

[0092] In some embodiments, the air conditioner may include a second branch pipe 120 and a third branch pipe 130, and the two ends of the electronic expansion valve 900 are respectively connected to one end of the second branch pipe 120 and one end of the third branch pipe 130, the other end of the second branch pipe 120 is connected to the fourth interface 701, and the other end of the third branch pipe 130 is connected to the first interface 601.

[0093] The second branch pipe 120 can be the liquid inlet pipe of the electronic expansion valve 900, or it can be the liquid outlet pipe of the electronic expansion valve 900; the third branch pipe 130 can be the liquid outlet pipe of the electronic expansion valve 900, or it can be the liquid inlet pipe of the electronic expansion valve 900, wherein, when the second branch pipe 120 is the liquid inlet pipe, the second connecting pipe is the liquid outlet pipe.

[0094] In some embodiments, the second branch pipe 120 is parallel to the third branch pipe 130 , and the second branch pipe 120 is parallel to the first branch pipe 110 , thereby improving the space utilization of the box.

[0095] In some embodiments, when the air conditioner is operating in heating mode, the electronic expansion valve 900 maintains a maximum opening, which can ensure the heat exchange efficiency between the refrigerant and the indoor heat exchanger 100 and ensure the heating effect of the air conditioner on the indoor temperature.

[0096] As attached Figure 8 As shown, in some embodiments, a first filter 140 is provided on the second branch pipe 120, and a second filter 150 is provided on the third branch pipe 130. The first filter 140 and the second filter 150 are used to filter impurities in the refrigerant, thereby reducing the failure rate of the system and improving stability.

[0097] In some embodiments, a first stop valve 160 is provided on the pipeline between the indoor heat exchanger 100 and the four-way valve 500 , and a second stop valve 170 is provided on the pipeline between the indoor heat exchanger 100 and the second interface 602 .

[0098] In some embodiments, the first stop valve 160 is a rough stop valve, which is used to control the delivery of the refrigerant between the indoor heat exchanger 100 and the four-way valve 500, so as to control the delivery of the refrigerant from the indoor heat exchanger 100 to the four-way valve 500. The rough stop valve can adjust the flow of the refrigerant between the indoor heat exchanger 100 and the four-way valve 500.

[0099] In some embodiments, the second stop valve 170 is a fine stop valve, which is used to control the transmission of the refrigerant between the outdoor heat exchanger 300 and the indoor heat exchanger 100 .

[0100] In the cooling mode, the fine stop valve controls the connection of the refrigerant flow path between the outdoor heat exchanger 300 and the indoor heat exchanger 100 to control the delivery of the refrigerant from the outdoor heat exchanger 300 to the indoor heat exchanger 100, or the fine stop valve controls the cutting off of the refrigerant flow path between the outdoor heat exchanger 300 and the indoor heat exchanger 100. In addition, the fine stop valve can adjust the flow of the refrigerant between the outdoor heat exchanger 300 and the indoor heat exchanger 100.

[0101] In some embodiments, the second stop valve 170 is disposed on the pipeline between the indoor heat exchanger 100 and the thermal expansion valve 200 to control the cutoff of the refrigerant flow path between the thermal expansion valve 200 and the indoor heat exchanger 100 .

[0102] In some embodiments, the second shut-off valve 170 is disposed on the pipeline between the first three-way pipe 600 and the thermal expansion valve 200 to control the cutoff of the refrigerant flow path between the first three-way pipe 600 and the indoor heat exchanger 100 .

[0103] In some embodiments, the four-way valve 500 has a first port, a second port, a third port and a fourth port, the first port is connected to the exhaust port, the second port is connected to the outdoor heat exchanger 300, the third port is connected to the air intake port, and the fourth port is connected to the indoor heat exchanger 100. The four-way valve 500 plays a reversing role for the refrigerant in the air conditioner, ensures the fluidity of the refrigerant in the air conditioner, and can improve the normal operation of the air conditioner.

[0104] When the electronic expansion valve 900 is in the closed state, the first port and the second port are connected, and the third port and the fourth port are connected. When the air conditioner is in the cooling mode, the electronic expansion valve 900 prevents the refrigerant from flowing from the fourth interface 701 to the third interface 603, but the refrigerant can flow from the sixth interface 603 to the first interface 601, completing the refrigeration cycle.

[0105] When the electronic expansion valve 900 is in the open state, the first port and the fourth port are connected, and the second port and the third port are connected. When the air conditioner is in the heating mode, the opening of the electronic expansion valve 900 can be adjusted to control the heating effect and the flow of the refrigerant. Adjusting the opening of the electronic expansion valve 900 can achieve the purpose of accurately controlling the indoor temperature and reducing the energy consumption of the equipment.

[0106] The opening size of the electronic expansion valve 900 can be adjusted. When the opening of the electronic expansion valve 900 is adjusted to the minimum, the refrigerant cannot continue to flow through the electronic expansion valve 900. When the opening of the electronic expansion valve 900 is adjusted to the maximum, the flow rate of the refrigerant through the electronic expansion valve 900 is the largest. When the opening of the electronic expansion valve 900 is adjusted to an appropriate level, the flow rate of the refrigerant through the electronic expansion valve 900 is appropriate.

[0107] When the air conditioner runs the refrigeration system, the opening of the electronic expansion valve 900 is set to zero to prevent the circulation of the refrigerant. The thermal expansion valve 200 can reduce the pressure of the refrigerant when it flows from the outdoor heat exchanger 300 to the indoor heat exchanger 100, thereby increasing the heat exchange area between the refrigerant and the indoor heat exchanger 100, improving the heat exchange efficiency of the indoor heat exchanger 100, and improving the refrigeration effect of the air conditioner.

[0108] When the air conditioner is operating the heating system, the electronic expansion valve 900 is normally opened to control the refrigerant flow. The electronic expansion valve 900 can reduce the pressure of the refrigerant when it flows from the indoor heat exchanger 100 to the outdoor heat exchanger 300, thereby increasing the heat exchange area between the refrigerant and the outdoor heat exchanger 300, and converting the refrigerant flowing from the outdoor heat exchanger 300 to the compressor 400 into a low-temperature and low-pressure gas, thereby improving the working efficiency of the compressor 400.

[0109] During the heating process, the refrigerant directly enters the outdoor heat exchanger 300 after being throttled and reduced in pressure by the electronic expansion valve 900, thereby reducing the pressure drop and improving the heating performance of the unit.

[0110] In some embodiments, the controller is configured to: when the air conditioner is in cooling mode, control the opening degree of the electronic expansion valve 900 to be zero; when the air conditioner is in heating mode, control the electronic expansion valve 900 to be in a throttling state.

[0111] In some embodiments, a gas-liquid separator 180 is further included, and the gas-liquid separator 180 has an inlet and an outlet, the inlet is connected to the third port, and the outlet is connected to the air intake port. The gas-liquid separator 180 uses a common cylindrical container, which can facilitate the production and installation of the gas-liquid separator 180 and reduce the production cost of the air conditioner.

[0112] The gas-liquid separator 180 can separate and remove moisture from the refrigerant. The cylindrical container can make it easier for moisture to adhere to the gas-liquid separator 180, thereby optimizing the effect of the gas-liquid separator 180 and improving the dryness of the refrigerant fluid entering the compressor 400.

[0113] In some embodiments, the third interface 603 and the fourth interface 701 are located at the same height, and the second interface 602 and the fifth interface 702 are located at the same height.

[0114] In some embodiments, the first three-way pipe 600 is installed vertically, the second three-way pipe 700 is installed vertically, and the third interface 603 and the fourth interface 701 are located at the same height to ensure the smoothness of the refrigerant flowing from the third interface 603 to the fourth interface 701. The second interface 602 and the fifth interface 702 are located at the same height, which makes the arrangement of the pipelines more neat and beautiful, and saves the installation space of the pipelines.

[0115] In some embodiments, the fourth interface 701 and the sixth interface 603 are arranged on the same horizontal plane, and the fifth interface 702 is arranged below the fourth interface 701 and the sixth interface 603 .

[0116] In some embodiments, the first interface 601 and the third interface 603 are arranged on the same horizontal plane, and the second interface 602 is arranged below the first interface 601 and the third interface 603. Such an arrangement is not only conducive to the flow of the refrigerant, but also makes the pipeline tidy.

[0117] As attached Fig. 9 As shown, in some embodiments, when the electronic expansion valve 900 is in the open state, the refrigerant flowing out of the fourth interface 701 also flows to the first interface 601, and the refrigerant flowing out of the first interface 601 flows back to the fourth interface 701 through the third interface 603, forming a dynamic cycle with the refrigerant that previously flowed to the second interface 602 through the second stop valve 170.

[0118] In some embodiments, the controller is electrically connected to the compressor 400, the indoor heat exchanger 100, the electronic expansion valve 900, the outdoor heat exchanger 300, the four-way valve 500 and the gas-liquid separator 180. The controller can control the compression power of the compressor 400, control and adjust the air volume and air speed of the air conditioner, and control the internal flow path of the four-way valve 500 when the air conditioner runs different functions, thereby ensuring the working reliability of the air conditioner in realizing multiple functions.

[0119] In some embodiments, the first tee pipe 600 includes but is not limited to a flattened tee, a Y-shaped tee, a T-shaped tee, and other structural forms.

[0120] In some embodiments, the second tee pipe 700 includes but is not limited to a flattened tee, a Y-shaped tee, a T-shaped tee, and other structural forms.

[0121] In some embodiments, the first three-way pipe 600 and the second three-way pipe 700 have the same structure, and the first three-way pipe 600 and the second three-way pipe 700 are connected in parallel, so that the pipeline distribution is neat and simple.

[0122] In some embodiments, the one-way valve 800 is a solenoid valve, which is electrically connected to a controller, and the controller controls the opening or closing of the solenoid valve. In the air conditioning cooling mode, the solenoid valve is controlled to be opened, and the refrigerant flows from the sixth interface 603 to the first interface 601. In the air conditioning heating mode, the solenoid valve is controlled to be closed.

[0123] In some embodiments, the air conditioner includes an indoor unit, the indoor unit is hollow, the thermal expansion valve 200 is disposed inside the indoor unit, and the indoor heat exchanger 100 is disposed inside the indoor unit.

[0124] In some embodiments, the air conditioner includes an outdoor unit, which is hollow, and a compressor 400, a four-way valve 500, an electronic expansion valve 900, a first three-way pipe 600, and a second three-way pipe 700 are arranged inside the outdoor unit.

[0125] When the air conditioner is running in cooling mode, the indoor unit can provide cold air to the location. When the air conditioner is running in heating mode, the indoor unit can provide hot air to the location.

[0126] In some embodiments, the air conditioner may include a fourth branch pipe, which is disposed between the thin stop valve and the second interface 602. The air conditioner may include a fifth branch pipe, which is disposed between the outdoor heat exchanger 300 and the fifth interface 702.

[0127] In some embodiments, the fourth branch pipe is parallel to the fifth straight pipe, which saves pipeline space, reduces the difficulty of pipeline design, and realizes a compact pipeline design.

[0128] In some embodiments, the first three-way pipe 600, the second three-way pipe 700, the one-way valve 800 and the electronic expansion valve 900 can be connected as an integral component, and when maintenance or replacement is required, the entire component can be removed for maintenance or replacement. During the air conditioner pipeline assembly process, the integral component can be assembled into an integral component first and then installed into the air conditioner pipeline, which has high assembly efficiency.

[0129] As attached Figure 10 to Figure 11 As shown, the principle of realizing refrigerant flow control by the piping scheme of the present application is as follows: in the cooling mode of the air conditioner, the refrigerant flows to the second three-way pipe 700 after dissipating heat through the outdoor heat exchanger 300. At this time, the refrigerant flow has two options: flowing to the sixth interface 603 or flowing to the fourth interface 701. The installation direction of the one-way valve 800 is to connect the sixth interface 603 to the first interface 601. The opening of the electronic expansion valve 900 between the fourth interface 701 and the third interface 603 is zero, which prevents the refrigerant from circulating, so that the electronic expansion valve 900 does not throttle and does not affect the refrigerant flow.

[0130] The refrigerant flows to the first interface 601 through the one-way valve 800, and then flows to the second interface 602. At this time, the refrigerant has two options: flowing to the fine stop valve or flowing to the third interface 603. Since the opening of the electronic expansion valve 900 between the fourth interface 701 and the third interface 603 is zero, the refrigerant is prevented from flowing, and the electronic expansion valve 900 is not throttled, which does not affect the refrigerant flow. The refrigerant flows to the fine stop valve, then enters the thermal expansion valve 200 for throttling, and finally evaporates through the indoor heat exchanger 100 and returns to the compressor 400 through the four-way valve 500 to complete the refrigeration cycle.

[0131] In the air conditioning heating mode, the refrigerant enters the fine stop valve and then flows to the first three-way pipe 600. At this time, the refrigerant has two flow directions: flowing to the first interface 601 or flowing to the third interface 603. The installation direction of the one-way valve 800 is to block the first interface 601 to the sixth interface 603. After the refrigerant flows to the first interface 601, it can no longer flow to the sixth interface 603, so the refrigerant flows to the third interface 603.

[0132] The electronic expansion valve 900 is normally opened to control the refrigerant flow, and the electronic expansion valve 900 regulates the refrigerant supply. After the refrigerant flows out of the electronic expansion valve 900, it flows to the fourth interface 701 and the fifth interface 702. At this time, the refrigerant has two options: to flow to the check valve 800 and the outdoor heat exchanger 300. The installation direction of the check valve 800 is to conduct from the sixth interface 603 to the first interface 601. The refrigerant flows to the first interface 601 through the check valve 800, and finally flows to the second interface 602, forming a dynamic cycle with the refrigerant that initially flows to the first interface 601 through the stop valve.

[0133] The refrigerant flowing out of the fifth interface 702 eventually flows to the outdoor heat exchanger 300, and after passing through the outdoor heat exchanger 300, returns to the compressor 400 through the four-way valve 500, completing the heating cycle.

[0134] In addition, the present application also provides an air conditioner, which includes a thermal expansion valve 200, which is arranged indoors. The thermal expansion valve 200 throttles and depressurizes high-temperature and high-pressure liquid refrigerant to form a low-temperature and low-pressure vapor-liquid mixture that is easy to evaporate.

[0135] The air conditioner includes an indoor heat exchanger 100 . The indoor heat exchanger 100 is disposed indoors and is connected to a thermal expansion valve 200 .

[0136] The air conditioner includes an outdoor heat exchanger 300, which is disposed outdoors. The outdoor heat exchanger 300 and the indoor heat exchanger 100, one of which works as a condenser, and the other works as an evaporator.

[0137] The air conditioner includes a compressor 400 having an air intake port and an air discharge port.

[0138] The air conditioner includes a four-way valve 500, which is connected to an air intake port, an air discharge port, an indoor heat exchanger 100, and an outdoor heat exchanger 300, respectively.

[0139] The air conditioner includes a first three-way pipe 600 . The first three-way pipe 600 has a first interface 601 , a second interface 602 and a third interface 603 . The second interface 602 is connected to the thermal expansion valve 200 .

[0140] The air conditioner includes a second three-way pipe 700 , which has a fourth interface 701 , a fifth interface 702 and a sixth interface 603 . The fourth interface 701 is connected to the third interface 603 , the fifth interface 702 is connected to the outdoor heat exchanger 300 , and the sixth interface 603 is connected to the first interface 601 .

[0141] The air conditioner includes a one-way valve 800 , and the one-way valve 800 is turned on when the refrigerant flows from the sixth interface 603 to the first interface 601 .

[0142] The air conditioner includes an electronic expansion valve 900 , which is disposed on a pipeline between the third interface 603 and the fourth interface 701 .

[0143] The air conditioner includes a controller, which is electrically connected to the electronic expansion valve 900, and is used to control the opening of the electronic expansion valve 900. The controller can calculate and judge and send instructions to other components in the air conditioner, and can store certain settings to control the operating conditions of the air conditioner, realize automatic operation adjustment of the air conditioner, which is conducive to improving the intelligence of the air conditioner and can improve the user experience.

[0144] The controller receives the refrigeration signal to control the electronic expansion valve 900 to close. The high-temperature and high-pressure gaseous refrigerant output by the compressor 400 flows into the outdoor heat exchanger 300 through the four-way valve 500. The medium-temperature and high-pressure liquid refrigerant flowing out of the outdoor heat exchanger 300 flows through the fifth interface 702, the sixth interface 603, the first interface 601, the second interface 602, the thermal expansion valve 200, and the indoor heat exchanger 100 in sequence. The low-temperature and low-pressure gaseous refrigerant flowing out of the indoor heat exchanger 100 flows back to the compressor 400 through the four-way valve 500.

[0145] The controller receives the refrigeration signal to control the electronic expansion valve 900 to open. The high-temperature and high-pressure gaseous refrigerant output by the compressor 400 flows into the indoor heat exchanger 100 through the four-way valve 500. The medium-temperature and high-pressure liquid refrigerant flowing out of the indoor heat exchanger 100 flows through the thermal expansion valve 200, the second interface 602, the third interface 603, the electronic expansion valve 900, the fourth interface 701, the fifth interface 702, and the outdoor heat exchanger 300 in sequence. The low-temperature and low-pressure gaseous refrigerant flowing out of the outdoor heat exchange flows back to the compressor 400 through the four-way valve 500, so that the electronic expansion valve 900 can adjust the refrigerant liquid supply.

[0146] Through the above technical solution, the first three-way pipe 600 and the second three-way pipe 700 are arranged in parallel, the two ends of the electronic expansion valve 900 are respectively connected to one end of the first three-way pipe 600 and one end of the second three-way pipe 700, and the two ends of the one-way valve 800 are respectively connected to the other end of the first three-way pipe 600 and the other end of the second three-way pipe 700. The pipeline is simple, which saves pipeline space, reduces the difficulty of pipeline design, and realizes a compact pipeline design.

[0147] In some embodiments, the indoor unit is an American duct, and the outdoor unit is a replacement unit. The indoor unit is provided with a thermal expansion valve 200 at the inlet of the indoor heat exchanger 100 to adjust the liquid supply of the indoor heat exchanger 100 during the cooling process of the air conditioner.

[0148] In some embodiments, the compressor 400 is a variable frequency refrigeration compressor 400, and the driving mode of the compressor 400 is a DC or AC drive. The compressor 400 is a main functional element in the air conditioner cooling and heating system. The refrigerant after heat exchange in the indoor heat exchanger 100 can enter the compressor 400 from the compressor 400 inlet. After compression, condensation, expansion, and evaporation of the compressor 400, the high-temperature and high-pressure refrigerant gas is discharged from the exhaust port.

[0149] The compressor 400 can provide power and heat for the refrigerant to flow in the air conditioner, so that the air conditioner can cool and heat the room. The air conditioner can adjust the indoor temperature to the temperature specified by the user, thereby ensuring the cooling and heating effects of the air conditioner.

[0150] During the cooling process of the air conditioner, the high-temperature and high-pressure refrigerant gas flowing out of the compressor 400 passes through the outdoor heat exchanger 300, releases heat and condenses in the outdoor heat exchanger 300, and is converted into a medium-temperature and high-pressure refrigerant liquid. During the heating process of the air conditioner, the medium-temperature and high-pressure refrigerant liquid flowing out of the indoor heat exchanger 100 passes through the outdoor heat exchanger 300, absorbs heat and vaporizes in the outdoor heat exchanger 300, and is converted into a low-temperature and low-pressure refrigerant gas.

[0151] The air conditioner also includes a receiver, a controller electrically connected to the electronic expansion valve 900, and the receiver is electrically connected to the controller. The receiver is used to receive cooling or heating instructions, and the controller is used to control the opening or closing of the electronic expansion valve 900 according to the cooling or heating instructions.

[0152] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. An air conditioner, characterized in that: It includes: Indoor heat exchanger; A thermal expansion valve, which is arranged indoors and communicated with the indoor heat exchanger; Outdoor heat exchanger; A compressor having an air intake port and an air discharge port; A four-way valve, wherein the four-way valve is respectively connected to the air intake port, the air exhaust port, the indoor heat exchanger and the outdoor heat exchanger; A first three-way pipe, wherein the first three-way pipe has a first interface, a second interface and a third interface, and the second interface is connected to the thermal expansion valve; A second three-way pipe, wherein the second three-way pipe has a fourth interface, a fifth interface and a sixth interface, the fourth interface is connected to the third interface, the fifth interface is connected to the outdoor heat exchanger, and the sixth interface is connected to the first interface; a one-way valve, the one-way valve being used to conduct the refrigerant to flow from the sixth interface to the first interface; Controller; An electronic expansion valve, the electronic expansion valve is electrically connected to the controller, two ends of the electronic expansion valve are respectively connected to the third interface and the fourth interface, and the controller is used to control the opening of the electronic expansion valve; a first refrigerant circuit, wherein the first refrigerant circuit is sequentially connected to the compressor, the four-way valve, the indoor heat exchanger, the fifth interface, the sixth interface, the first interface, the second interface, the thermal expansion valve, and the indoor heat exchanger; A second refrigerant circuit, wherein the second refrigerant circuit is sequentially connected to the compressor, the four-way valve, the indoor heat exchanger, the thermal expansion valve, the second interface, the third interface, the electronic expansion valve, the fourth interface, the fifth interface, and the outdoor heat exchanger; The electronic expansion valve is in a closed state, the refrigerant flows along the first refrigerant circuit, and the thermal expansion valve adjusts the supply amount of the refrigerant; The electronic expansion valve is in an open state, and when the refrigerant flows along the second refrigerant circuit, the electronic expansion valve adjusts the liquid supply of the refrigerant.

2. An air conditioner, characterized in that: It includes: A thermal expansion valve, wherein the thermal expansion valve is arranged indoors; An indoor heat exchanger, the indoor heat exchanger is arranged indoors and is connected to the thermal expansion valve; An outdoor heat exchanger, wherein the outdoor heat exchanger is arranged outdoors; A compressor having an air intake port and an air discharge port; A four-way valve, wherein the four-way valve is respectively connected to the air intake port, the air exhaust port, the indoor heat exchanger and the outdoor heat exchanger; A first three-way pipe, wherein the first three-way pipe has a first interface, a second interface and a third interface, and the second interface is connected to the thermal expansion valve; A second three-way pipe, wherein the second three-way pipe has a fourth interface, a fifth interface and a sixth interface, the fourth interface is connected to the third interface, the fifth interface is connected to the outdoor heat exchanger, and the sixth interface is connected to the first interface; a one-way valve, the one-way valve being turned on when the refrigerant flows from the sixth interface to the first interface; An electronic expansion valve, wherein two ends of the electronic expansion valve are respectively connected to the third interface and the fourth interface; A controller, the controller is electrically connected to the electronic expansion valve, and the controller is used to control the opening of the electronic expansion valve; The controller receives a refrigeration signal to control the electronic expansion valve to close, and the high-temperature and high-pressure gaseous refrigerant output by the compressor flows into the outdoor heat exchanger through the four-way valve, and the medium-temperature and high-pressure liquid refrigerant flowing out of the outdoor heat exchanger flows through the fifth interface, the sixth interface, the first interface, the second interface, the thermal expansion valve, and the indoor heat exchanger in sequence, and the low-temperature and low-pressure gaseous refrigerant flowing out of the indoor heat exchanger flows back to the compressor through the four-way valve; The controller receives a refrigeration signal to control the opening of the electronic expansion valve. The high-temperature and high-pressure gaseous refrigerant output by the compressor flows into the indoor heat exchanger through the four-way valve. The medium-temperature and high-pressure liquid refrigerant flowing out of the indoor heat exchanger flows through the thermal expansion valve, the second interface, the third interface, the electronic expansion valve, the fourth interface, the fifth interface, and the outdoor heat exchanger in sequence. The low-temperature and low-pressure gaseous refrigerant flowing out of the outdoor heat exchange flows back to the compressor through the four-way valve, so that the electronic expansion valve can adjust the refrigerant liquid supply.

3. The air conditioner according to claim 1 or 2, characterized in that: It also includes a first branch pipe, the first branch pipe is connected to the first interface and the sixth interface, and the one-way valve is arranged on the first branch pipe.

4. The air conditioner according to claim 1 or 2, characterized in that: It also includes a second branch pipe and a third branch pipe, the two ends of the electronic expansion valve are respectively connected to one end of the second branch pipe and one end of the third branch pipe, the other end of the second branch pipe is connected to the fourth interface, and the other end of the third branch pipe is connected to the first interface.

5. The air conditioner according to claim 4, characterized in that: The second branch pipe is provided with a first filter, and the third branch pipe is provided with a second filter.

6. The air conditioner according to claim 1 or 2, characterized in that: A first stop valve is provided on the pipeline between the indoor heat exchanger and the four-way valve, and a second stop valve is provided on the pipeline between the indoor heat exchanger and the second interface.

7. The air conditioner according to claim 1 or 2, characterized in that: The four-way valve has a first port, a second port, a third port and a fourth port, the first port is connected to the exhaust port, the second port is connected to the outdoor heat exchanger, the third port is connected to the air intake port, and the fourth port is connected to the indoor heat exchanger; When the electronic expansion valve is in a closed state, the first port is communicated with the second port, and the third port is communicated with the fourth port; When the electronic expansion valve is in an open state, the first port is communicated with the fourth port, and the second port is communicated with the third port.

8. The air conditioner according to claim 7, characterized in that: It also includes a gas-liquid separator, which has an inlet and an outlet, the inlet is connected to the third port, and the outlet is connected to the air intake port.

9. The air conditioner according to claim 1 or 2, characterized in that: The third interface and the fourth interface are located at the same height, and the second interface and the fifth interface are located at the same height.

10. The air conditioner according to claim 1 or 2, characterized in that: When the electronic expansion valve is in an open state, the refrigerant flowing out of the fourth interface also flows to the first interface, and the refrigerant flowing out of the first interface flows back to the fourth interface via the third interface.

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