air conditioner

Abstract

This utility model relates to an air conditioner, which includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a refrigerant heat sink. The refrigerant heat sink is provided with a first heat exchange section and a second heat exchange section. The first heat exchange section is formed on the main refrigerant circuit, and one end of the second heat exchange section is connected between the refrigerant heat sink and the indoor heat exchanger. The other end of the second heat exchange section is connected to the suction end of the compressor. A fourth expansion valve is provided on the first refrigerant branch circuit. When the temperature of the electronic components and / or the temperature-regulating components of the control board is too high, the fourth expansion valve opens, and part of the refrigerant in the main refrigerant circuit is transported to the second heat exchange section through the first refrigerant branch circuit. This facilitates the rapid cooling of the electronic components and / or the temperature-regulating components of the control board in conjunction with the refrigerant in the first heat exchange section. In addition, some of the cooling capacity in the second heat exchange section is also transferred to the first heat exchange section, which helps to reduce the temperature of the refrigerant in the main refrigerant circuit and increase the subcooling capacity.

Description

Technical Field

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

[0002] The electronic components of the air conditioner are installed on the main control board. During operation, if the temperature of the electronic components and / or the main control board is too high, there will be a problem of overheating and current limiting. In addition to affecting their own working status, this will also cause the air conditioner's capacity to decrease.

[0003] To address these issues, some air conditioners incorporate a short refrigerant pipe in the refrigerant circulation system, allowing the refrigerant to flow through the main control board. This short pipe provides cooling to the main control board, thereby improving high-temperature cooling capacity. However, if the electronic components and main control board heat up too quickly, the heat dissipation capacity of this short refrigerant pipe is limited, preventing rapid cooling. Furthermore, the low-temperature refrigerant in the short pipe absorbs excessive heat from the surfaces of the electronic components and temperature-regulating elements on the main control board, leading to an increase in the main refrigerant temperature and affecting its normal heat exchange efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide an air conditioner that solves the problems existing in the prior art, such as the electronic components and main control board heating up too quickly, the limited temperature control effect of the refrigerant in the main refrigerant circuit, and the refrigerant temperature rising in the main refrigerant circuit after absorbing heat, which affects the normal refrigerant heat exchange effect.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution:

[0006] In one aspect, this utility model proposes an air conditioner, which includes:

[0007] A compressor, which includes an exhaust end and an intake end;

[0008] Indoor and outdoor heat exchangers connected to the compressor;

[0009] A refrigerant heat dissipation component, which is provided with a first heat exchange section and a second heat exchange section;

[0010] The first heat exchange section is formed on the refrigerant main line connecting the indoor heat exchanger and the outdoor heat exchanger. One end of the second heat exchange section is connected between the refrigerant heat sink and the indoor heat exchanger through the first refrigerant branch line. The other end of the second heat exchange section is connected to the suction end of the compressor through the second refrigerant branch line. A fourth expansion valve is provided on the first refrigerant branch line.

[0011] In some embodiments of this application, the refrigerant heat sink is connected to the electronic device and / or the electronic control board via a heat-conducting component, and the second heat exchange section is located between the first heat exchange section and the electronic control board on the refrigerant heat sink.

[0012] The second heat exchange section is located between the first heat exchange section and the electronic control board. The heat from the electronic control board and electronic devices is first absorbed by the second heat exchange section, and some of the heat in the first heat exchange section is also carried away by the first heat exchange section. This helps to reduce the impact of the temperature of the electronic control board on the first heat exchange section and lower the temperature of the refrigerant in the main refrigerant circuit.

[0013] In some embodiments of this application, a first expansion valve is provided between the indoor heat exchanger and the refrigerant heat sink, and a second expansion valve is provided between the outdoor heat exchanger and the refrigerant heat sink.

[0014] In some embodiments of this application, a four-way valve is also included, the four-way valve including a first valve port, a second valve port, a third valve port and a fourth valve port, the first valve port being connected to the indoor heat exchanger, the second valve port being connected to the outdoor heat exchanger, the third valve port being connected to the output end of the compressor, and the fourth valve port being connected to the suction end of the compressor.

[0015] In cooling mode, the third valve port is connected to the second valve port, and the first valve port is connected to the fourth valve port. The refrigerant output from the compressor's discharge port is delivered to the outdoor heat exchanger through the third valve port and the second valve port. The outdoor heat exchanger acts as a condenser. After the refrigerant exchanges heat in the outdoor heat exchanger, it is delivered to the indoor heat exchanger. The indoor heat exchanger acts as an evaporator. The refrigerant output from the indoor heat exchanger is delivered back to the compressor through the first valve port and the fourth valve port.

[0016] In heating mode, the third valve port is connected to the first valve port, and the second valve port is connected to the fourth valve port. The refrigerant output from the compressor's discharge port is delivered to the indoor heat exchanger through the third valve port and the first valve port. After heat exchange in the indoor heat exchanger, the refrigerant is delivered to the outdoor heat exchanger. The refrigerant output from the outdoor heat exchanger is delivered back to the compressor through the second valve port and the fourth valve port.

[0017] In some embodiments of this application, a gas-liquid separator is further provided between the fourth valve port and the suction end of the compressor, and the second refrigerant branch is connected between the gas-liquid separator and the fourth valve port.

[0018] The refrigerant output from the second refrigerant branch is directly returned to the compressor's suction end through the gas-liquid separator, which helps increase the refrigerant's mass flow rate and plays a role in increasing gas volume and supplementing enthalpy.

[0019] In some embodiments of this application, a controller and a temperature sensing element are also included, the temperature sensing element being used to detect the temperature of the surface of the electronic device and / or the control board, and the controller being configured to control the opening degree of the fourth expansion valve based on the temperature of the surface of the electronic device and / or the control board.

[0020] By controlling the opening of the fourth expansion valve, the flow rate of refrigerant entering the second heat exchange section is controlled, thereby controlling and regulating the temperature of electronic devices, control boards, and other temperature-regulating components.

[0021] In some embodiments of this application, the refrigerant heat dissipation component is provided with at least two second heat exchange sections, and each second heat exchange section is arranged in parallel between the first refrigerant branch and the second refrigerant branch.

[0022] The refrigerant heat exchanger has at least two second heat exchange sections connected in parallel, which is beneficial to the influence of the second heat exchange sections on the refrigerant heat exchanger.

[0023] In some embodiments of this application, a plate heat exchanger is further provided between the output end of the compressor and the third valve port. The plate heat exchanger includes a heating channel and a heat carrying channel. The heating channel is connected between the third valve port and the output end of the compressor. The heat carrying channel is connected to the main refrigerant line between the first expansion valve and the first heat exchange section via a third refrigerant branch, and to the second refrigerant branch between the fourth expansion valve and the second heat exchange section via a fourth refrigerant branch. A third expansion valve is provided on the third refrigerant branch.

[0024] The refrigerant in the heating channel is a high-temperature refrigerant output from the compressor. The refrigerant in the heat transfer channel absorbs heat from the refrigerant in the heating channel and its temperature rises. It is then transported to the second heat exchange section through the second refrigerant branch. It is used to regulate the temperature of the component to be regulated through the refrigerant heat dissipation components to prevent its temperature from being too low and to prevent condensation.

[0025] In some embodiments of this application, a first detection element and a second detection element connected to a controller are also included. The first detection element is used to detect the dry-bulb temperature, and the second detection element is used to detect the wet-bulb temperature. The controller is configured to control the opening degree of the third expansion valve based on the dry-bulb temperature detected by the first detection element and the wet-bulb temperature detected by the second detection element.

[0026] In some embodiments of this application, the second heat exchange section and the first heat exchange section are reciprocated on the refrigerant heat sink to increase the contact area with the refrigerant heat sink.

[0027] On the other hand, this application also proposes an air conditioner comprising:

[0028] The outdoor unit includes a compressor, an outdoor heat exchanger, and a refrigerant heat exchange component. The compressor includes a discharge end and a suction end. The refrigerant heat exchange component is provided with a first heat exchange section and a second heat exchange section.

[0029] Indoor unit, which includes an indoor heat exchanger;

[0030] The compressor is connected to the outdoor heat exchanger, the indoor heat exchanger, and the refrigerant heat sink via a refrigerant main circuit, and the refrigerant heat sink is located between the outdoor heat exchanger and the indoor heat exchanger.

[0031] The first heat exchange section is formed on the refrigerant main line connecting the indoor heat exchanger and the outdoor heat exchanger. The second heat exchange section is connected in parallel with the first heat exchange section through the first refrigerant branch and the second refrigerant branch. A fourth expansion valve is provided on the first refrigerant branch. The second heat exchange section is used to increase the refrigerant subcooling in the refrigerant main line.

[0032] Compared with the prior art, the advantages and positive effects of this utility model are:

[0033] The air conditioner involved in this application has a second heat exchange section in addition to the first heat exchange section connected to the main refrigerant circuit in the refrigerant heat exchange component. One end of the second heat exchange section is connected between the refrigerant heat exchange component and the indoor heat exchanger through the first refrigerant branch circuit, and the other end of the second heat exchange section is connected to the suction end of the compressor through the second refrigerant branch circuit. A fourth expansion valve is provided on the first refrigerant branch circuit.

[0034] When the temperature of electronic components and / or control boards waiting for temperature regulation is too high and the first heat exchange section cannot cool them down quickly, the fourth expansion valve opens. Some of the refrigerant in the main refrigerant circuit is transported to the second heat exchange section through the first refrigerant branch. Because the second heat exchange section is throttled and cooled again by the fourth expansion valve, the temperature of the refrigerant flowing through the second heat exchange section is lower. This is beneficial for working together with the refrigerant in the first heat exchange section to quickly cool down the electronic components and / or control boards waiting for temperature regulation. In addition, some of the cooling capacity in the second heat exchange section is also transferred to the first heat exchange section, which helps to reduce the temperature of the refrigerant in the main refrigerant circuit and increase the subcooling capacity.

[0035] Other features and advantages of this utility model will become clearer after reading the detailed embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is one of the air conditioner system diagrams according to an embodiment;

[0038] Figure 2 This is a schematic diagram of a four-way valve according to an embodiment;

[0039] Figure 3 This is a schematic diagram of refrigerant flow in the heating mode according to the embodiment;

[0040] Figure 4 This is a schematic diagram of refrigerant flow under the refrigeration mode according to the embodiment;

[0041] Figure 5 This is a schematic diagram showing the refrigerant heat exchanger and the component to be regulated, according to an embodiment.

[0042] Figure 6 This is a view of the connection end face between the refrigerant heat exchanger and the component to be regulated;

[0043] Figure 7 This is a second diagram of an air conditioner system according to an embodiment;

[0044] Figure 8 According to Figure 7 A schematic diagram of refrigerant flow in the heating mode of the embodiment;

[0045] Figure 9 According to Figure 7 A schematic diagram of refrigerant flow during the anti-condensation process in the heating mode of the embodiment;

[0046] Figure 10 According to Figure 7 Schematic diagram of refrigerant flow in the refrigeration mode of the embodiment;

[0047] Figure 11 According to Figure 7 Schematic diagram of refrigerant flow during the anti-condensation process in the refrigeration mode of the embodiment;

[0048] Figure label:

[0049] 10. Main refrigerant circuit; 11. First heat exchange section; 21. Second heat exchange section; 20. First refrigerant branch circuit; 30. Second refrigerant branch circuit; 40. Third refrigerant branch circuit; 50. Fourth refrigerant branch circuit;

[0050] 100. Compressor; 11. Gas-liquid separator;

[0051] 200, Four-way valve; 210, First valve port; 220, Second valve port; 230, Third valve port; 240, Fourth valve port;

[0052] 300. Indoor heat exchanger;

[0053] 400. Outdoor heat exchanger;

[0054] 500. Plate heat exchanger;

[0055] 600. Refrigerant heat sink; 610. Electronic control board; 620. Electronic components;

[0056] 710. First expansion valve; 720. Second expansion valve; 730. Third expansion valve; 740. Fourth expansion valve;

[0057] 810. First shut-off valve; 820. Second shut-off valve;

[0058] 910, First inspection piece; 920, Second inspection piece; 930, Temperature inspection piece. Detailed Implementation

[0059] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0060] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0061] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0062] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0063] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0064] The following disclosure provides many different embodiments or examples for implementing various structures of this invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0065] In this application, the air conditioner performs a refrigeration cycle by using a compressor, condenser, expansion valve, and evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to cool or heat an indoor space.

[0066] Low-temperature, low-pressure refrigerant enters the compressor, which compresses it into a high-temperature, high-pressure refrigerant gas 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.

[0067] The expansion valve expands the high-temperature, high-pressure liquid refrigerant that condenses 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. The evaporator achieves its 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 of the indoor space.

[0068] The outdoor unit of an air conditioner refers to the part of the refrigeration cycle that includes the compressor and the outdoor heat exchanger. The indoor unit of an air conditioner includes the indoor heat exchanger, and an expansion valve can be provided in either the indoor or outdoor unit.

[0069] The indoor and outdoor heat exchangers function as either condensers or evaporators. When the indoor heat exchanger is used as a condenser, the air conditioner functions as a heater in heating mode; when the indoor heat exchanger is used as an evaporator, the air conditioner functions as a cooler in cooling mode.

[0070] refer to Figure 1 , Figure 2 In one aspect, this utility model proposes an air conditioner, which includes a compressor 100, an indoor heat exchanger 300, an outdoor heat exchanger 400, and a refrigerant heat dissipation component 600.

[0071] The compressor 100 includes an exhaust end and an intake end, and the compressor 100 is connected to the indoor heat exchanger 300 and the outdoor heat exchanger 400 through the refrigerant main line 10.

[0072] The refrigerant heat sink 600 is specifically used to connect with the electronic device 620 and / or the electronic control board 610 or other temperature control components to regulate the temperature of the electronic device 620 and / or the electronic control board 610.

[0073] Electronic device 620 is mounted on electronic control board 610. Electronic device 620, electronic control board 610 and refrigerant heat sink 600 are connected by heat-conducting component (not shown). The heat generated by electronic device 620 and electronic control board 610 during the operation of temperature control component is transferred to refrigerant heat sink 600 through heat-conducting component.

[0074] Specifically, the heat-conducting component is silicone grease, which has good thermal conductivity and is used to transfer heat from the temperature-controlled component and the electronic control board 610 to the refrigerant heat sink 600, resulting in better heat transfer and a simpler manufacturing process.

[0075] Compared to the traditional refrigerant heat sink 600 which only has a first heat exchange section 11 connected to the main refrigerant circuit 10, the refrigerant heat sink 600 involved in this application also includes at least one second heat exchange section 21.

[0076] Specifically, the first heat exchange section 11 is formed on the refrigerant main line 10 connecting the indoor heat exchanger 300 and the outdoor heat exchanger 400.

[0077] One end of the second heat exchange section 21 is connected between the refrigerant heat sink 600 and the indoor heat exchanger 300 through the first refrigerant branch 20, and the other end of the second heat exchange section 21 is connected to the suction end of the compressor 100 through the second refrigerant branch 30. A fourth expansion valve 740 is provided on the first refrigerant branch 20.

[0078] When the temperature of the electronic device 620 and / or the control board 610 is too high and the first heat exchange section 11 cannot cool it down quickly, the fourth expansion valve 740 opens, and part of the refrigerant in the main refrigerant line 10 is transported to the second heat exchange section 21 through the first refrigerant branch line 20.

[0079] Because the second heat exchange section 21 is throttled and cooled again by the fourth expansion valve 740, the temperature of the refrigerant flowing through the second heat exchange section 21 is lower. This is beneficial for working together with the refrigerant in the first heat exchange section 11 to quickly cool down the electronic device 620 and / or the control board 610 and other temperature-regulating components. In addition, some of the cooling capacity in the second heat exchange section 21 is also transferred to the first heat exchange section 11, which helps to reduce the temperature of the refrigerant in the main refrigerant circuit 10 and increase the subcooling capacity.

[0080] In some embodiments of this application, the second heat exchange section 21 is disposed between the first heat exchange section 11 and the electronic control board 610. The heat of the electronic control board 610 and the electronic device 620 is first absorbed by the second heat exchange section 21, and some of the heat in the first heat exchange section 11 is also carried away by the first heat exchange section 11. This helps to reduce the impact of the temperature of the electronic control board 610 on the first heat exchange section 11 and lower the temperature of the refrigerant in the refrigerant main circuit 10.

[0081] In some embodiments of this application, a first expansion valve 710 is provided between the indoor heat exchanger 300 and the refrigerant heat sink 600, and a second expansion valve 720 is provided between the outdoor heat exchanger 400 and the refrigerant heat sink 600.

[0082] For details, please refer to the following: Figure 2 In some embodiments of this application, a four-way valve 200 is also included. The four-way valve 200 includes a first valve port 210, a second valve port 220, a third valve port 230, and a fourth valve port 240. The first valve port 210 is connected to the indoor heat exchanger 300, the second valve port 220 is connected to the outdoor heat exchanger 400, the third valve port 230 is connected to one end of the heating channel in the plate heat exchanger 500, the other end of the heating channel is connected to the exhaust end of the compressor 100, and the fourth valve port 240 is connected to the suction end of the compressor 100.

[0083] In some embodiments, a first shut-off valve 810 and a second shut-off valve 820 are also provided on the refrigerant main line 10. The first shut-off valve 810 is located between the first expansion valve 710 and the refrigerant heat sink 600, and the second shut-off valve 820 is located between the first valve port 210 and the indoor heat exchanger 300. In the cooling or heating cycle, the shut-off valve can prevent the refrigerant from flowing back in the system and ensure that the refrigerant flows in the correct direction, thereby ensuring the normal operation and efficiency of the system.

[0084] refer to Figure 3 In heating mode, the third valve port 230 is connected to the first valve port 210, and the second valve port 220 is connected to the fourth valve port 240. The refrigerant output from the discharge end of the compressor 100 is transported to the indoor heat exchanger 300 through the third valve port 230 and the first valve port 210. After heat exchange in the indoor heat exchanger 300, the refrigerant is transported to the outdoor heat exchanger 400. The refrigerant output from the outdoor heat exchanger 400 is transported back to the compressor 100 through the second valve port 220 and the fourth valve port 240.

[0085] refer to Figure 4 In cooling mode, the third valve port 230 is connected to the second valve port 220, and the first valve port 210 is connected to the fourth valve port 240. The refrigerant output from the discharge end of the compressor 100 is delivered to the outdoor heat exchanger 400 through the third valve port 230 and the second valve port 220. The outdoor heat exchanger 400 acts as a condenser. After the refrigerant exchanges heat in the outdoor heat exchanger 400, it is delivered to the indoor heat exchanger 300. The indoor heat exchanger 300 acts as an evaporator. The refrigerant output from the indoor heat exchanger 300 is delivered back to the compressor 100 through the first valve port 210 and the fourth valve port 240.

[0086] In some embodiments of this application, a controller and a temperature detection element 930 are also included, the temperature detection element 930 being used to detect the temperature of the surface of the electronic device 620 and / or the control board 610, and the controller being configured to control the opening degree of the fourth expansion valve 740 by the temperature of the surface of the electronic device 620 and / or the control board 610.

[0087] By controlling the opening of the fourth expansion valve 740, the flow rate of refrigerant entering the second heat exchange section 21 is controlled, thereby controlling and adjusting the temperature of electronic devices 620, electronic control board 610 and other temperature-regulating components.

[0088] Specifically, when the controller detects that the temperature rise rate of the surface of the electronic device 620 and / or the control board 610 waiting for temperature regulation is greater than the preset temperature change value within a unit time, it indicates that the electronic device 620 and / or the control board 610 waiting for temperature regulation is experiencing excessively rapid temperature rise.

[0089] In order to prevent the surface temperature of the electronic components 620 and / or the control board 610 from rising too quickly, and to prevent the first heat exchange section 11 from absorbing too much heat and causing the internal refrigerant temperature to be too high, thus affecting the heat exchange effect in the later stage, the controller controls the fourth expansion valve 740 to open when the temperature rise condition is met.

[0090] Part of the refrigerant transported from the main refrigerant line 10 passes through the first refrigerant branch line 20 and is throttled and cooled by the fourth expansion valve 740 before being transported into the second heat exchange section 21. The refrigerant temperature in the second heat exchange section 21 is lower than that in the first heat exchange section 11, which allows it to absorb heat from the surface of the component to be regulated more quickly, thereby reducing the surface temperature of the component and preventing excessive temperature rise.

[0091] At the same time, the second heat exchange section 21 can also absorb the heat of the refrigerant in the first heat exchange section 11, reduce the temperature of the refrigerant in the main refrigerant circuit 10, and increase its subcooling.

[0092] The process of preventing temperature rise may occur during heating or cooling.

[0093] refer to Figure 3 When a temperature rise occurs during the heating process:

[0094] The refrigerant output from the discharge end of the compressor 100 is delivered to the indoor heat exchanger 300 through the third valve port 230 and the first valve port 210. After heat exchange in the indoor heat exchanger 300, the refrigerant is delivered to the outdoor heat exchanger 400.

[0095] Before being delivered to the outdoor heat exchanger 400, the low-temperature refrigerant in the main refrigerant path 10 passes through the first heat exchange section 11 and is cooled by the refrigerant heat dissipation component 600 and the temperature control component and the electronic control board 610.

[0096] When a temperature rise occurs, the fourth expansion valve 740 opens. A portion of the refrigerant passes through the first heat exchange section 11 and is then transported to the outdoor heat exchanger 400. After heat exchange in the outdoor heat exchanger 400, the refrigerant is returned to the compressor 100. Another portion of the refrigerant passes through the fourth expansion valve 740 and is then transported from the first refrigerant branch 20 to the second heat exchange section 21.

[0097] The low-temperature refrigerant in the second heat exchange section 21 absorbs some of the heat from the temperature-controlled element and the first heat exchange section 11, and its temperature rises. It then flows through the second refrigerant branch 30 to the main refrigerant line 10, and is then sent back to the suction end of the compressor 100 through the gas-liquid separator 11.

[0098] Under the action of the second heat exchange section 21, the temperature of the component to be regulated drops rapidly, and the temperature of the refrigerant in the first heat exchange section 11 drops.

[0099] refer to Figure 4 When a temperature rise occurs during the refrigeration process:

[0100] The refrigerant output from the discharge end of the compressor 100 is delivered to the outdoor heat exchanger 400 through the third valve port 230 and the second valve port 220. After heat exchange in the outdoor heat exchanger 400, the refrigerant is delivered to the indoor heat exchanger 300.

[0101] Before being delivered to the indoor heat exchanger 300, the low-temperature refrigerant in the main refrigerant path 10 passes through the first heat exchange section 11 and is cooled by the refrigerant heat dissipation component 600.

[0102] When a temperature rise occurs, the fourth expansion valve 740 opens, and part of the refrigerant output from the first heat exchange section 11 is returned to the compressor 100 after heat exchange in the outdoor heat exchanger 400; another part of the refrigerant output from the first heat exchange section 11 is throttled by the fourth expansion valve 740 on the first refrigerant branch 20 and then transported to the second heat exchange section 21.

[0103] The low-temperature refrigerant in the second heat exchange section 21 absorbs some of the heat from the temperature-controlled element and the first heat exchange section 11, and its temperature rises. It then flows through the second refrigerant branch 30 to the main refrigerant line 10, and is then sent back to the suction end of the compressor 100 through the gas-liquid separator 11.

[0104] Under the action of the second heat exchange section 21, the temperature of the component to be regulated drops rapidly, and the temperature of the refrigerant in the first heat exchange section 11 drops.

[0105] The second heat exchange section 21 can absorb heat from the power module on the electronic control board 610 and the refrigerant in the main refrigerant circuit 10. Finally, the refrigerant in the second heat exchange section 21 becomes a low-pressure gas and returns to the compressor 100 after passing through the gas-liquid separator 11. In addition, this design can also improve the subcooling of the main refrigerant circuit 10. This is because, compared with the traditional circulation system design, the refrigerant in the second heat exchange section 21 has a lower temperature, so the refrigerant flowing through the first heat exchange section 11 absorbs very little or even releases heat.

[0106] In some embodiments of this application, the refrigerant heat dissipation component 600 is provided with at least two second heat exchange sections 21, and each second heat exchange section 21 is arranged in parallel between the first refrigerant branch 20 and the second refrigerant branch 30.

[0107] At least two second heat exchange sections 21 are connected in parallel on the refrigerant heat exchange component 600, which is beneficial to the influence of the second heat exchange section 21 on the refrigerant heat exchange component 600.

[0108] refer to Figure 5 , Figure 6 In some embodiments of this application, the second heat exchange section 21 and the first heat exchange section 11 are reciprocally arranged on the refrigerant heat sink 600 to increase the contact area with the refrigerant heat sink 600.

[0109] In some embodiments of this application, after the temperature rise condition is met, the controller can also adjust the temperature based on the surface temperature T of the component to be adjusted detected by the temperature sensor 930. fin The opening degree of the fourth expansion valve 740 is adjusted.

[0110] When T fin ≤T finmax When -γ is present, the controller keeps the fourth expansion valve 740 closed; otherwise, the controller opens the fourth expansion valve 740.

[0111] Specifically, T finmax -γ <T fin ≤T finmax When -δ1, the opening degree of the fourth expansion valve 740 is K1;

[0112] T finmax -δ1 <T fin ≤T finmax When -δ2, the opening degree of the fourth expansion valve 740 is K2;

[0113] T finmax -δ2 <T fin ≤T finmax When -δ3, the opening degree of the fourth expansion valve 740 is K3;

[0114] ······

[0115] T finmax -δ n-1 <T fin ≤T finmax -δ n At that time, the opening degree of the fourth expansion valve 740 is K. n ;

[0116] After a preset time, the controller periodically adjusts the opening of the fourth expansion valve 740 until T... fin ≤T finmax -γ.

[0117] Among them, T finmax This is the highest temperature on the surface of the part to be conditioned, and the value can be selected from 80~100℃.

[0118] γ>δ1>δ2>δ3>δ4·······>δ n K1 < K2 < K3 <K4<······<Kn。

[0119] γ, δ1, δ2, δ 、 δ4、·····δ n The specific temperature values ​​and the opening degree of the fourth expansion valve 740 in different temperature ranges are determined according to the actual working environment.

[0120] refer to Figure 7 In some embodiments of this application, a plate heat exchanger 500 is further provided between the output end of the compressor 100 and the third valve port 230. The plate heat exchanger 500 includes a heating channel and a heat carrying channel. The heating channel is connected between the third valve port 230 and the output end of the compressor 100. The heat carrying channel is connected to the main refrigerant line 10 between the first expansion valve 710 and the first heat exchange section 11 via a third refrigerant branch 40, and to the second refrigerant branch 30 between the fourth expansion valve 740 and the second heat exchange section 21 via a fourth refrigerant branch 50. A third expansion valve 730 is provided on the third refrigerant branch 40.

[0121] The refrigerant in the heating channel is a high-temperature refrigerant output from the compressor 100. After absorbing the heat from the refrigerant in the heating channel, the temperature of the refrigerant in the heat transfer channel rises. It is then transported to the second heat exchange section 21 via the second refrigerant branch 30. This is used to regulate the temperature of the component to be regulated through the refrigerant heat dissipation component 600, so as to prevent its temperature from being too low and to prevent condensation.

[0122] Condensation occurs in both heating and cooling modes of air conditioning. The following is a detailed explanation of the anti-condensation process in both heating and cooling modes:

[0123] refer to Figure 8 In heating mode, the refrigerant output from the exhaust end of the compressor 100 is delivered to the indoor heat exchanger 300 through the third valve port 230 and the first valve port 210. After heat exchange in the indoor heat exchanger 300, the refrigerant is delivered to the outdoor heat exchanger 400.

[0124] Before being delivered to the outdoor heat exchanger 400, the low-temperature refrigerant in the main refrigerant path 10 passes through the first heat exchange section 11 and is cooled by the refrigerant heat dissipation component 600 and the temperature control component and the electronic control board 610.

[0125] refer to Figure 9 In anti-condensation mode, the fourth expansion valve 740 is closed and the third expansion valve 730 is opened. A portion of the refrigerant is transported through the first heat exchange section 11 to the outdoor heat exchanger 400 for heat exchange, and then returned to the compressor 100; another portion of the refrigerant is transported through the third refrigerant branch 40 to the heat carrying channel in the plate heat exchanger 500.

[0126] After the low-temperature refrigerant in the heat transfer channel absorbs the heat from the high-temperature refrigerant in the heating channel, its temperature rises. It is then transported to the second heat exchange section 21 via the fourth refrigerant branch 50, where it dissipates heat in the refrigerant heat dissipation component 600. This heats the electrical control board 610 and other temperature-regulating components, making it higher than the dew point temperature of the surrounding air, thereby preventing condensation.

[0127] The refrigerant in the second heat exchange section 21 flows through the second refrigerant branch 30 to the main refrigerant line 10. After passing through the gas-liquid separator 11, this part of the refrigerant is sent back to the compressor 100.

[0128] refer to Figure 10 In cooling mode, the refrigerant output from the exhaust end of the compressor 100 first passes through the heating channel in the plate heat exchanger 500. After being output from the heating channel, it is transported to the outdoor heat exchanger 400 through the third valve port 230 and the second valve port 220. After the refrigerant is heat-exchanged in the outdoor heat exchanger 400, it is transported to the indoor heat exchanger 300.

[0129] Before being delivered to the indoor heat exchanger 300, the low-temperature refrigerant in the main refrigerant path 10 passes through the first heat exchange section 11 and is cooled by the refrigerant heat dissipation component 600.

[0130] refer to Figure 11 Under the condition of condensation, the fourth expansion valve 740 closes and the third expansion valve 730 opens. Part of the refrigerant output from the first heat exchange section 11 is returned to the compressor 100 after heat exchange in the indoor heat exchanger 300. The other part of the refrigerant is transported to the heat-carrying channel in the plate heat exchanger 500 through the third refrigerant branch 40. The low-temperature refrigerant in the heat-carrying channel absorbs the heat from the high-temperature refrigerant in the heating channel, and its temperature rises. The heated refrigerant is then transported to the second heat exchange section 21 through the fourth refrigerant branch 50 and dissipates heat in the refrigerant heat dissipation component 600, raising the temperature of the temperature-controlled component and the electronic control board 610 to above the condensation temperature, thereby preventing condensation.

[0131] The refrigerant in the second heat exchange section 21 flows from the second refrigerant branch 30 into the main refrigerant line 10. After passing through the gas-liquid separator 11, this portion of refrigerant is returned to the compressor 100.

[0132] On the other hand, this application also proposes an air conditioner comprising:

[0133] The outdoor unit includes a compressor 100, an outdoor heat exchanger 400, and a refrigerant heat sink 600. The compressor 100 includes an exhaust end and an intake end. The refrigerant heat sink 600 is provided with a first heat exchange section 11 and a second heat exchange section 21.

[0134] Indoor unit, which includes indoor heat exchanger 300.

[0135] The compressor 100 is connected to the outdoor heat exchanger 400, the indoor heat exchanger 300 and the refrigerant heat sink 600 through the refrigerant main line 10, and the refrigerant heat sink 600 is located between the outdoor heat exchanger 400 and the indoor heat exchanger 300.

[0136] The first heat exchange section 11 is formed on the refrigerant main line 10 connecting the indoor heat exchanger 300 and the outdoor heat exchanger 400. The second heat exchange section 21 is connected in parallel with the first heat exchange section 11 through the first refrigerant branch line 20 and the second refrigerant branch line 30. A fourth expansion valve 740 is provided on the first refrigerant branch line 20. The second heat exchange section 21 is used to increase the subcooling of the refrigerant in the main line.

[0137] Refer again Figure 6 In some embodiments of this application, specifically, when the temperature of the electronic device 620 and / or the control board 610 waiting for temperature regulation is too high and the first heat exchange section 11 cannot cool it down quickly, the fourth expansion valve 740 opens, and part of the refrigerant in the main refrigerant line 10 is transported to the second heat exchange section 21 through the first refrigerant branch line 20. Since the second heat exchange section 21 is throttled and cooled again by the fourth expansion valve 740, the temperature of the refrigerant flowing through the second heat exchange section 21 is lower, which is beneficial to work together with the refrigerant in the first heat exchange section 11 to absorb the heat Q2 of the electronic device 620 and / or the control board 610 waiting for temperature regulation, and to quickly cool down the electronic device 620 and / or the control board 610 waiting for temperature regulation.

[0138] In addition, some of the heat Q1 in the first heat exchange section 11 is absorbed by the second heat exchange section 21, which helps to reduce the temperature of the refrigerant in the main refrigerant circuit 10 and increase the subcooling.

[0139] In some embodiments of this application, a plate heat exchanger 500 is further provided between the output end of the compressor 100 and the third valve port 230. The plate heat exchanger 500 includes a heating channel and a heat carrying channel. The heating channel is connected between the third valve port 230 and the output end of the compressor 100. The heat carrying channel is connected to the main refrigerant line 10 between the first expansion valve 710 and the first heat exchange section 11 via a third refrigerant branch 40, and to the second refrigerant branch 30 between the fourth expansion valve 740 and the second heat exchange section 21 via a fourth refrigerant branch 50. A third expansion valve 730 is provided on the third refrigerant branch 40.

[0140] The refrigerant in the heating channel is a high-temperature refrigerant output from the compressor 100. After absorbing the heat from the refrigerant in the heating channel, the temperature of the refrigerant in the heat transfer channel rises. It is then transported to the second heat exchange section 21 via the second refrigerant branch 30. This is used to regulate the temperature of the component to be regulated through the refrigerant heat dissipation component 600, so as to prevent its temperature from being too low and to prevent condensation.

[0141] In cooling or heating mode, refrigerant is transported from indoor heat exchanger 300 to outdoor heat exchanger 400, or from outdoor heat exchanger 400 to indoor heat exchanger 300. When the anti-condensation mode is activated, the fourth expansion valve 740 is closed and the third expansion valve 730 is opened. Part of the refrigerant on the main refrigerant line 10 between indoor heat exchanger 300 and outdoor heat exchanger 400 is transported to the heat transfer channel in plate heat exchanger 500 via the third refrigerant branch line 40.

[0142] After the low-temperature refrigerant in the heat transfer channel absorbs the heat from the high-temperature refrigerant in the heating channel, its temperature rises. It is then transported to the second heat exchange section 21 via the fourth refrigerant branch 50, where it dissipates heat in the refrigerant heat dissipation component 600. This heats the electrical control board 610 and other temperature-regulating components, making it higher than the dew point temperature of the surrounding air, thereby preventing condensation.

[0143] The refrigerant in the second heat exchange section 21 flows through the second refrigerant branch 30 to the main refrigerant line 10. After passing through the gas-liquid separator 11, this part of the refrigerant is sent back to the compressor 100.

[0144] In some embodiments of this application, a first detection element 910 and a second detection element 920 connected to a controller are also included. The first detection element 910 is used to detect dry-bulb temperature, and the second detection element 920 is used to detect wet-bulb temperature. The controller is configured to control the opening degree of the third expansion valve 730 based on the dry-bulb temperature detected by the first detection element 910 and the wet-bulb temperature detected by the second detection element 920.

[0145] The controller uses the dry-bulb temperature t detected by the first sensor 910 and the wet-bulb temperature t detected by the second sensor 920. w The dew point temperature T was calculated. d .

[0146] When the surface temperature T of the part to be heated fin Less than the dew point temperature T d At that time, the controller controls the third expansion valve 730 to open, and adjusts the opening based on the dew point temperature T. d The surface temperature T of the part to be conditioned fin The difference between the values ​​determines the initial opening of the third expansion valve 730.

[0147] Specifically, when the dew point temperature T d The surface temperature T of the part to be conditioned fin The larger the difference between them, the larger the initial opening of the third expansion valve 730, so that more high-temperature refrigerant passes through the second heat exchange section 21 to increase the temperature of the refrigerant heat exchange components and the surface temperature T of the component to be regulated. fin Increase.

[0148] In some embodiments of this application, the dew point temperature Td The relationship with the dry-bulb temperature \(t\) and the wet-bulb temperature \(t_w\) satisfies: w

[0149]

[0150] Where, \(E\) w is the saturated water vapor pressure corresponding to the wet-bulb temperature; \(e\) is the water vapor pressure corresponding to the ambient air, \(A\) is the psychrometric coefficient, and \(T_d\) d is the dew point temperature.

[0151] Where, the relevant parameters and coefficients in the calculation process are all known or obtained through detection.

[0152] The determination of the initial opening of the third expansion valve 730 follows:

[0153] When \(t_1\leq T_d\) d \(-T_d\) fin the initial opening \(E_V(0)=K_1\times E_V\) max ;

[0154] When \(t_2\leq T_d\) d \(-T_d\) fin \(<t_1\), the initial opening \(E_V(0)=K_2\times E_V\) max ;

[0155] ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​

[0160] The opening degree of the third expansion valve 730 is adjusted to meet:

[0161] When, T1 ≤ T d -T fin (n), the opening degree adjustment amount of the third expansion valve 730 is: △EV = k1;

[0162] T2 ≤ T d -T fin (n) < T1, the opening degree adjustment amount of the third expansion valve 730 is: △EV = k2;

[0163] T3 ≤ T d -T fin (n) < T2, the opening degree adjustment amount of the third expansion valve 730 is: △EV = k3;

[0164] ······

[0165] T n ≤ T d -T fin (n) < T n-1 When, the opening degree adjustment amount of the third expansion valve 730 is: △EV = k n ;

[0166] Among them, the opening degree adjustment amounts k1, k 2、 k 3、 k4······k n should be determined according to the actual operation conditions, and k1 > k2 > k3 > k^{4}>······> k n .

[0167] During the anti-condensation process, pay attention to the temperature rise problem of the component to be adjusted. When T fin > T finmax (-γ), close the third expansion valve at the preset valve closing speed.

[0168] Similarly, during the anti-temperature rise control process, pay attention to the condensation situation of the component to be adjusted. When T fin ≤ Td, the controller controls the fourth expansion valve 740 to close the valve.

[0169] Whenever possible, the various aspects and features described and illustrated in the specification may be applied separately, and these separate aspects may be the subject of a divisional application.

[0170] In the description of the above embodiments, the specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

[0171] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An air conditioner, characterized in that, include: A compressor, which includes an exhaust end and an intake end; Indoor and outdoor heat exchangers connected to the compressor; A refrigerant heat dissipation component, which is provided with a first heat exchange section and a second heat exchange section; The first heat exchange section is formed on the refrigerant main line connecting the indoor heat exchanger and the outdoor heat exchanger. One end of the second heat exchange section is connected between the refrigerant heat sink and the indoor heat exchanger through the first refrigerant branch. The other end of the second heat exchange section is connected to the suction end of the compressor through the second refrigerant branch. A fourth expansion valve is provided on the first refrigerant branch.

2. The air conditioner according to claim 1, characterized in that, The refrigerant heat sink is connected to the electronic device and / or the electronic control board via a heat-conducting component. On the refrigerant heat sink, the second heat exchange section is located between the first heat exchange section and the electronic control board.

3. The air conditioner according to claim 1, characterized in that, A first expansion valve is provided between the indoor heat exchanger and the refrigerant heat sink, and a second expansion valve is provided between the outdoor heat exchanger and the refrigerant heat sink.

4. The air conditioner according to claim 3, characterized in that, It also includes a four-way valve, which includes a first valve port, a second valve port, a third valve port and a fourth valve port. The first valve port is connected to the indoor heat exchanger, the second valve port is connected to the outdoor heat exchanger, the third valve port is connected to the output end of the compressor, and the fourth valve port is connected to the suction end of the compressor.

5. The air conditioner according to claim 4, characterized in that, A gas-liquid separator is also provided between the fourth valve port and the suction end of the compressor, and the second refrigerant branch is connected between the gas-liquid separator and the fourth valve port.

6. The air conditioner according to claim 1, characterized in that, It also includes a controller and a temperature sensor for detecting the temperature of the electronic components and / or the surface of the control board, and the controller is configured to adjust the opening of the fourth expansion valve based on the temperature of the electronic components and / or the surface of the control board.

7. The air conditioner according to claim 1, characterized in that, The refrigerant heat dissipation component is provided with at least two second heat exchange sections, and each second heat exchange section is arranged in parallel between the first refrigerant branch and the second refrigerant branch.

8. The air conditioner according to claim 4, characterized in that, A plate heat exchanger is also provided between the output end of the compressor and the third valve port. The plate heat exchanger includes a heating channel and a heat carrying channel. The heating channel is connected between the third valve port and the output end of the compressor. The heat carrying channel is connected to the main refrigerant line between the first expansion valve and the first heat exchange section via a third refrigerant branch, and to the second refrigerant branch between the fourth expansion valve and the second heat exchange section via a fourth refrigerant branch. A third expansion valve is provided on the third refrigerant branch.

9. The air conditioner according to claim 8, characterized in that, It also includes a first detection element and a second detection element connected to the controller. The first detection element is used to detect the dry-bulb temperature, and the second detection element is used to detect the wet-bulb temperature. The controller is configured to control the opening degree of the third expansion valve based on the dry-bulb temperature detected by the first detection element and the wet-bulb temperature detected by the second detection element.

10. An air conditioner, characterized in that, include: The outdoor unit includes a compressor, an outdoor heat exchanger, and a refrigerant heat exchange component. The compressor includes a discharge end and a suction end. The refrigerant heat exchange component is provided with a first heat exchange section and a second heat exchange section. Indoor unit, which includes an indoor heat exchanger; The compressor is connected to the outdoor heat exchanger, the indoor heat exchanger, and the refrigerant heat sink via a refrigerant main circuit, and the refrigerant heat sink is located between the outdoor heat exchanger and the indoor heat exchanger. The first heat exchange section is formed on the refrigerant main line connecting the indoor heat exchanger and the outdoor heat exchanger. The second heat exchange section is connected in parallel with the first heat exchange section through the first refrigerant branch and the second refrigerant branch. A fourth expansion valve is provided on the first refrigerant branch. The second heat exchange section is used to increase the refrigerant subcooling in the refrigerant main line.

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