Air conditioner

Abstract

The application relates to an air conditioner, belonging to the technical field of air conditioners. The air conditioner comprises a refrigerant circuit, in which refrigerant is circulated through a compressor, a condenser, a single throttling component and an evaporator in sequence; an indoor heat exchanger and an outdoor heat exchanger, one of which works as an evaporator and the other works as a condenser; a first four-way valve for switching the refrigerant flow direction; a refrigerant heat dissipation module arranged on a pipeline between the outlet of the condenser and the inlet of the evaporator in the refrigerant circuit to dissipate heat of the power module by using the cold energy of the refrigerant; and a single reversing valve arranged on the pipeline between the outlet of the condenser and the inlet of the evaporator, which is connected with the throttling component and the refrigerant heat dissipation module. In the refrigeration mode, the reversing valve makes the refrigerant flowing out of the outlet of the condenser pass through the refrigerant heat dissipation module and the throttling component in sequence and then enter the evaporator.

Description

Technical Field

[0001] This application relates to the technical field of air conditioning, and more particularly to an air conditioner. Background Technology

[0002] Currently, in air conditioning systems, the electronic control module inevitably generates heat during operation. Since the electronic control module is easily damaged or its lifespan reduced at high temperatures, a refrigerant cooling module is typically installed to dissipate heat from the electronic control module. The heat dissipation efficiency of the refrigerant cooling module directly affects the lifespan of the electronic components within the electronic control module. In existing technology, the refrigerant cooling module is usually connected to the air conditioning system, utilizing refrigerant circulation to remove the heat dissipated by the electronic components in the electronic control module, thus ensuring the normal operation of the module.

[0003] In air conditioning systems, refrigerant exists in both low-pressure, low-temperature and high-pressure, high-temperature states. When the refrigerant entering the refrigerant heat dissipation module is in a low-pressure state, its temperature is lower than the air dew point temperature of the electronic control module. This can cause condensation on the surface of the electronic control module, posing a risk of damage. To ensure the normal operation of the refrigerant heat dissipation module, two throttling components are typically installed before and after the module to regulate the state of the refrigerant flowing through it.

[0004] However, the increase in the number of throttling components increases the overall cost of air conditioner production, reduces price competitiveness, and affects consumers' purchasing choices. Utility Model Content

[0005] This application addresses, to at least some extent, one of the technical problems in the related art.

[0006] Therefore, this application aims to provide an air conditioner that, by setting a reversing valve in the refrigerant circuit, ensures the normal operation of the refrigerant heat dissipation module even when the air conditioner has only one throttling component, controls the heat dissipation of the refrigerant heat dissipation module on the electronic controller, reduces the risk of condensation on the surface of the electronic controller, further protects the power module, and reduces the cost of the throttling component in the air conditioner.

[0007] To achieve the above objectives, this application provides an air conditioner, comprising: The refrigerant circuit, in which the refrigerant circulates sequentially through the compressor, condenser, a single throttling component, and evaporator; An indoor heat exchanger and an outdoor heat exchanger, one of which functions as an evaporator and the other as a condenser; The first four-way valve is used to switch the refrigerant flow direction in the refrigerant circuit so that the indoor heat exchanger and the outdoor heat exchanger can switch between the condenser and the evaporator; A refrigerant heat dissipation module is installed in the refrigerant circuit and located on the pipeline between the outlet of the condenser and the inlet of the evaporator, so as to use the cooling capacity of the refrigerant to dissipate heat from the power module. A single reversing valve is provided on the pipeline between the outlet of the condenser and the inlet of the evaporator, and the reversing valve is connected to the throttling component and the refrigerant heat dissipation module; In cooling mode, the reversing valve causes the refrigerant flowing out of the condenser outlet to pass sequentially through the refrigerant heat dissipation module and the throttling component into the evaporator.

[0008] In the technical solution, by setting a reversing valve, when there is a throttling component in the air conditioner, when the air conditioner is running in cooling mode, the high-pressure refrigerant flowing from the compressor flows sequentially through the outdoor heat exchanger and the refrigerant heat dissipation module, so that the refrigerant is always kept at a high pressure before entering the throttling component. This ensures that the temperature of the refrigerant flowing into the refrigerant heat dissipation module is always higher than the dew point temperature, thereby effectively avoiding condensation, ensuring the stable operation of the power module, and reducing the electrical control cost of the air conditioner.

[0009] In some embodiments of this application, the reversing valve is a four-way reversing valve, and the four-way reversing valve includes: The first port is connected to one end of the refrigerant heat dissipation module; The second port is connected to one end of the outdoor heat exchanger; The third port is connected in series between the refrigerant heat dissipation module and the third port; The fourth port is connected to one end of the indoor heat exchanger; In cooling mode, the first port is connected to the second port, and the third port is connected to the fourth port.

[0010] The technical solution describes the connection positions of the four ports of the reversing four-way valve to explain the connection situation of each port of the reversing four-way valve in cooling and heating modes. In cooling mode, the high-pressure refrigerant can first pass through the refrigerant heat dissipation module and then be throttled by the throttling component. This allows the refrigerant heat dissipation module to reduce the possibility of condensation while dissipating heat from the power module, thus protecting the normal operation of the power module.

[0011] In some embodiments of this application, a first refrigerant pipeline is connected between the first port and the third port, and the refrigerant heat dissipation module and the throttling component are connected in series on the first refrigerant pipeline.

[0012] In the technical solution, the connection position of the first refrigerant pipeline is explained. In the cooling mode, the first refrigerant pipeline is used to supply high-pressure refrigerant so that the high-pressure refrigerant can enter the refrigerant heat dissipation module, enabling the refrigerant heat dissipation module to operate normally, reducing the risk of condensation and protecting the power module.

[0013] In some embodiments of this application, the coils of the first four-way valve and the reversing four-way valve are connected in parallel so that the first four-way valve and the reversing four-way valve are synchronously powered on or off.

[0014] In the technical solution, by setting the first four-way valve and the reversing four-way valve to be controlled synchronously, the independent wiring port and connecting cable of the reversing four-way valve are eliminated, thereby saving costs. By reducing electrical connection points, the control is simplified. The flow path switching of the reversing four-way valve is achieved by controlling the command of the first four-way valve, thereby improving efficiency.

[0015] In some embodiments of this application, the reversing valve is a two-position three-way valve, which is connected between the outdoor heat exchanger and the throttling component. The two-position three-way valve includes: The first connection end is connected to one end of the throttling component; The third connection terminal is connected to one end of the outdoor heat exchanger; The second connection terminal is connected to the third connection terminal via the refrigerant heat dissipation module.

[0016] In the technical solution, by setting the reversing valve as a two-position three-way valve, only the first four-way valve exists in the air conditioner, thereby reducing the cost of the four-way valve in the air conditioner and simplifying the number of refrigerant flow pipes in the air conditioner, thus reducing costs.

[0017] In some embodiments of this application, the third connection terminal is connected in series with the outdoor heat exchanger via a first branch; the second connection terminal is connected in series with the outdoor heat exchanger via a second branch; the refrigerant heat dissipation module is connected in series with the second branch, and the first branch and the second branch are connected in parallel.

[0018] The technical solution explains the position and connection of the two-position three-way valve in the air conditioner when the reversing valve is a two-position three-way valve, so as to explain the switching of the control port of the two-position three-way valve so that the refrigerant heat dissipation module can operate normally in the cooling mode.

[0019] In some embodiments of this application, the conduction state of the two-position three-way valve includes a first state position in which the first connection end and the second connection end are connected, and a second state position in which the first connection end and the third connection end are connected; In heating mode, the two-position three-way valve switches between the first state position and the second state position. When the two-position three-way valve is in the first state position, the refrigerant flowing out of the indoor heat exchanger enters the outdoor heat exchanger through the throttling device and the refrigerant heat dissipation module in sequence. When the two-position three-way valve is in the second state position, the refrigerant flowing out of the indoor heat exchanger enters the outdoor heat exchanger through the throttling device.

[0020] In the technical solution, under heating mode, the conduction state of the two-position three-way valve is controlled to control whether the refrigerant passes through the refrigerant heat dissipation module, thereby reducing the risk of condensation on the surface of the electronic controller and improving the operational reliability of the electronic controller.

[0021] In some embodiments of this application, the air conditioner further includes a controller and a first temperature sensor, the first temperature sensor being used to detect the outdoor ambient temperature, the first temperature sensor being electrically connected to the controller, and the output terminal of the controller being electrically connected to the solenoid coil of the two-position three-way valve.

[0022] In the technical solution, a first temperature sensor is set up to detect the outdoor temperature. The controller is connected to the first temperature sensor so that the controller can control the opening state of the two-position three-way valve according to the outdoor temperature, so that the refrigerant enters the refrigerant heat dissipation module and the refrigerant heat dissipation module dissipates heat from the electronic controller.

[0023] In some embodiments of this application, the air conditioner further includes a second temperature sensor electrically connected to the controller, the second temperature sensor being used to detect the temperature of the power module; In heating mode, the controller drives the two-position three-way valve to switch from the first state position to the second state position based on the temperature detected by the second temperature sensor.

[0024] In the technical solution, a second temperature sensor is provided to detect the real-time temperature of the power module. The controller is connected to the second temperature sensor to control the conduction state of the two-position three-way valve. The two-position three-way valve is driven to switch from the first state position to the second state position according to the temperature detected by the second temperature sensor.

[0025] In addition, this application also provides an air conditioner, comprising: The refrigerant circuit, in which the refrigerant circulates sequentially through the compressor, condenser, a single throttling component, and evaporator; An indoor heat exchanger and an outdoor heat exchanger, one of which functions as an evaporator and the other as a condenser; The first four-way valve is used to switch the refrigerant flow direction in the refrigerant circuit so that the indoor heat exchanger and the outdoor heat exchanger can switch between the condenser and the evaporator; A refrigerant heat dissipation module is installed in the refrigerant circuit and located on the pipeline between the outlet of the condenser and the inlet of the evaporator, so as to use the cooling capacity of the refrigerant to dissipate heat from the power module. The second four-way valve is located on the pipeline between the outlet of the condenser and the inlet of the evaporator. The second four-way valve is connected to the throttling component and the refrigerant heat dissipation module. In either cooling or heating mode, the second four-way valve causes the refrigerant flowing out of the condenser outlet to first pass through the refrigerant heat dissipation device and then through the throttling device.

[0026] In the technical solution, by setting a second four-way valve, the refrigerant in a high-pressure state after heat exchange in the condenser is first cooled by the refrigerant heat dissipation module to the power module in both cooling and heating modes, and then its temperature state is changed by the throttling component. This reduces the risk of condensation on the surface of the electronic controller, and ensures that the refrigerant heat dissipation module can still operate normally even with only one throttling component in the air conditioner, thereby reducing the cost of the throttling component in the air conditioner.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the overall structure based on the prior art of this application; Figure 2 This is a schematic diagram of the overall structure of the reversing four-way valve according to an embodiment of this application; Figure 3 This is a schematic diagram of the overall structure of the refrigerant circuit in cooling mode according to the embodiments of this application; Figure 4 This is a schematic diagram of the overall structure of the refrigerant circuit in heating mode according to the embodiments of this application; Figure 5 This is a schematic diagram of the overall structure of a two-position three-way valve according to an embodiment of this application; Figure 6 This is a schematic diagram of the overall structure of the refrigerant circuit in cooling mode according to the embodiments of this application; Figure 7 This is a schematic diagram of the overall structure of the two-position three-way valve in the first state position in heating mode according to the embodiment of this application; Figure 8 This is a schematic diagram of the overall structure of the two-position three-way valve in the second state position under heating mode according to the embodiment of this application; Figure 9 This is a control flow diagram of a two-position three-way valve according to an embodiment of this application; Figure 10 This is an overall flow chart of a two-position three-way valve according to an embodiment of this application.

[0029] In the above diagrams: 100, compressor; 200, indoor heat exchanger; 300, outdoor heat exchanger; 400, throttling device; 500, refrigerant circuit; 600, first four-way valve; 700, refrigerant heat dissipation module; 800, reversing four-way valve; 900, two-position three-way valve; 301, First temperature sensor; 302, Third temperature sensor; 701. Second temperature sensor; 801, First port; 802, Second port; 803, Third port; 804, Fourth port; 805, First refrigerant line; 901, First connection end; 902, Second connection end; 903, Third connection end; 904, First branch; 905, Second branch. Detailed Implementation In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this application. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature. In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0030] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments. In the following, embodiments of this application will be described in detail with reference to the accompanying drawings. As attached Figures 1 to 4 As shown in an illustrative embodiment of the air conditioner of this application, the air conditioner includes a compressor 100, which compresses refrigerant gas into a high-temperature and high-pressure state and discharges the compressed refrigerant gas.

[0031] In some embodiments, the air conditioner may include an indoor heat exchanger 200. When refrigerant passes through the indoor heat exchanger 200, it either evaporates and absorbs heat or condenses and releases heat, thereby changing the state of the refrigerant. When the refrigerant in the indoor heat exchanger 200 evaporates and absorbs heat, the indoor heat exchanger 200 acts as an evaporator, and a refrigeration cycle is performed to cool the room. When the refrigerant in the indoor heat exchanger 200 condenses and releases heat, the indoor heat exchanger 200 acts as a condenser, and a heating cycle is performed to raise the temperature of the room.

[0032] In some embodiments, the air conditioner may include an outdoor heat exchanger 300, the refrigerant state in the outdoor heat exchanger 300 corresponding to the refrigerant state in the indoor heat exchanger 200, the outdoor heat exchanger 300 acting as a condenser when the indoor heat exchanger 200 acts as an evaporator, and the outdoor heat exchanger 300 acting as an evaporator when the indoor heat exchanger 200 acts as a condenser.

[0033] In some embodiments, the air conditioner may include a throttling component 400 located between the outdoor heat exchanger 300 and the indoor heat exchanger 200. The throttling component 400 is used to control the flow rate and pressure of the refrigerant to throttle and reduce the pressure of the refrigerant, so as to facilitate the refrigerant to absorb or release heat in the outdoor heat exchanger 300 or the indoor heat exchanger 200, thereby realizing the recycling of the refrigerant.

[0034] In some embodiments, the air conditioner may include a refrigerant circuit 500, which connects a compressor 100, an outdoor heat exchanger 300, a throttling device 400, and an indoor heat exchanger 200 in series. The refrigerant circuit 500 provides a flow path for the refrigerant, which circulates sequentially through the compressor 100, the condenser, the single throttling device 400, and the evaporator. The refrigerant circulates within the refrigerant circuit 500 under the action of the compressor 100.

[0035] In some embodiments, the air conditioner may include a first four-way valve 600, which is disposed in the refrigerant circuit 500. The first four-way valve 600 is used to switch the refrigerant flow direction in the refrigerant circuit to realize the conversion between the condenser and the evaporator.

[0036] In some embodiments, the air conditioner may include an electronic controller, primarily used for receiving instructions and processing information. The electronic controller may include a power module.

[0037] In some embodiments, the air conditioner may include a refrigerant heat dissipation module 700. The refrigerant heat dissipation module 700 is disposed in the refrigerant circuit 500 and located on the pipeline between the outlet of the condenser and the inlet of the evaporator. The refrigerant heat dissipation module 700 utilizes the characteristic that the temperature of the refrigerant is lower than the operating temperature of the electronic controller, so that when the refrigerant passes through the refrigerant heat dissipation module 700, the temperature of the refrigerant heat dissipation module 700 is lower than the operating temperature of the electronic controller. This allows the refrigerant heat dissipation module 700 to absorb the heat generated by the operation of the power module in the electronic controller, thereby cooling the power module and ensuring the normal operation of the electronic controller.

[0038] In the prior art, as shown in the appendix Figure 1As shown, in an air conditioner, the refrigerant exists in both high-pressure and high-temperature states and low-pressure and low-temperature states during circulation. When the refrigerant entering the refrigerant heat dissipation module 700 is low-temperature and low-pressure, its temperature is below the dew point, causing condensation on the surface of the electronic controller and increasing the risk of damage. Therefore, throttling components 400 are installed on both sides of the refrigerant heat dissipation module 700 to reduce the possibility of condensation and ensure the normal operation of the refrigerant heat dissipation module 700. However, the addition of throttling components 400 increases both the cost of the electronic controller and the cost of the throttling components 400.

[0039] Based on this, this application provides a reversing valve in the refrigerant circuit to ensure the normal operation of the refrigerant heat dissipation module 700 even when there is only one throttling component 400 in the air conditioner, and to reduce the risk of condensation on the surface of the electronic controller.

[0040] By setting a single reversing valve, in cooling mode, the high-temperature, high-pressure refrigerant flowing from compressor 100 first passes through outdoor heat exchanger 300 to become low-temperature, high-pressure refrigerant. Under the action of the reversing valve, the low-temperature, high-pressure refrigerant first absorbs heat through refrigerant heat dissipation module 700, increasing its temperature while maintaining its pressure, thus becoming medium-temperature, high-pressure refrigerant. It then passes through throttling device 400 for further throttling, becoming low-temperature, low-pressure refrigerant, which enters indoor heat exchanger 200 for heat exchange before finally returning to compressor 100, completing one cycle. During this process, because the temperature of the low-temperature, high-pressure refrigerant is higher than its dew point temperature, the possibility of condensation on the surface of the electronic controller is reduced, protecting its normal operation.

[0041] In some embodiments, as shown in the appendix Figure 2 As shown, the reversing valve can be a four-way reversing valve 800, which is connected to the refrigerant heat dissipation module 700. The four-way reversing valve 800 is used to allow the high-pressure refrigerant to first absorb heat through the refrigerant heat dissipation module 700 to cool the electronic controller, and then pass through the throttling component 400 to throttle the flow, changing the state of the refrigerant in preparation for entering the outdoor heat exchanger 300 or the indoor heat exchanger 200 for heat exchange.

[0042] In some embodiments, the reversing four-way valve 800 may include a first port 801, which is connected to one end of the refrigerant heat dissipation module 700.

[0043] In some embodiments, the reversing four-way valve 800 may include a second port 802, which is connected to one end of the outdoor heat exchanger 300.

[0044] In some embodiments, the reversing four-way valve 800 may include a third port 803, and a throttling component 400 is connected in series between the refrigerant heat dissipation module and the third port 803.

[0045] In some embodiments, the reversing four-way valve 800 may include a fourth port 804, which is connected to one end of the indoor heat exchanger 200.

[0046] In some embodiments, as shown in the appendix Figure 3 and Figure 4 As shown, a first refrigerant pipe 805 is connected between the first port 801 and the third port 803. The refrigerant heat dissipation module 700 and the throttling component 400 are connected in series on the first refrigerant pipe 805. The first refrigerant pipe 805 is used to allow high-pressure refrigerant to pass through so that the high-pressure refrigerant can enter the refrigerant heat dissipation module 700.

[0047] In cooling mode, the second port 802 is connected to the first port 801, and the third port 803 is connected to the fourth port 804, so that the high-pressure low-temperature refrigerant flowing out from the outdoor heat exchanger 300 enters the first refrigerant pipeline 805 through the second port 802 and the first port 801, and enters the refrigerant heat dissipation module 700 through the first refrigerant pipeline 805 to absorb heat, thereby increasing the temperature of the high-pressure low-temperature refrigerant. Then, after being throttled by the throttling device 400, it enters the refrigerant circuit 500 through the third port 803 and the fourth port 804 for subsequent refrigerant circulation.

[0048] In heating mode, the fourth port 804 is connected to the first port 801, and the second port 802 is connected to the third port 803, so that the high-pressure low-temperature refrigerant flowing out of the indoor heat exchanger 200 enters the first refrigerant pipeline 805 through the fourth port 804 and the first port 801, and enters the refrigerant heat dissipation module 700 to absorb heat through the first refrigerant pipeline 805. Then the refrigerant is throttled by the throttling device 400. After the refrigerant state is changed, it returns to the refrigerant circuit 500 through the third port 803 and the second port 802 for subsequent refrigerant circulation.

[0049] In some embodiments, as shown in the appendix Figure 3 and Figure 4 As shown, the reversing four-way valve 800 and the first four-way valve 600 have the same structure. The reversing four-way valve 800 will be used as an example for explanation. The reversing four-way valve 800 may include a solenoid pilot valve. The solenoid pilot valve receives energized or de-energized signals from the electronic controller. When the solenoid pilot valve receives an energized signal, its coil is energized, generating magnetic force to drive the reversing four-way valve 800 to switch directions. When the solenoid pilot valve receives a de-energized signal, its coil is de-energized, the magnetic force disappears, and the reversing four-way valve 800 returns to its initial position.

[0050] In some embodiments, the coils of the electromagnetic pilot valves of the first four-way valve 600 and the reversing four-way valve 800 are connected in parallel to the same control circuit interface of the electronic controller, so that the first four-way valve 600 and the reversing four-way valve 800 respond to the same control signal to achieve synchronous power-on or power-off, thereby saving costs and simplifying control. The flow path switching of the reversing four-way valve 800 is achieved by controlling the command of the first four-way valve 600, thereby improving efficiency.

[0051] In some embodiments, as shown in the appendix Figures 5 to 10 As shown, the reversing valve can be a two-position three-way valve 900, which is connected between the outdoor heat exchanger 300 and the throttling component 400. By setting the two-position three-way valve 900, only the first four-way valve 600 exists in the air conditioner, thereby reducing the cost of the four-way valve in the air conditioner, simplifying the number of refrigerant flow pipes in the air conditioner, and reducing costs.

[0052] In some embodiments, as shown in the appendix Figures 6 to 8 As shown, the two-position three-way valve 900 may include a first connection end 901, which is connected to one end of the throttling component 400.

[0053] In some embodiments, the two-position three-way valve 900 may include a third connection end 903, which is connected to one end of the outdoor heat exchanger 300.

[0054] In some embodiments, the two-position three-way valve 900 may include a second connection end 902, and a refrigerant heat dissipation module 700 is connected between the second connection end 902 and the third connection end 903.

[0055] By defining the connection positions of the first connection end 901, the second connection end 902, and the third connection end 903 in the refrigerant circuit 500, the position of the two-position three-way valve 900 in the refrigerant circuit 500 is also defined. This allows the two-position three-way valve 900 to switch between different connection ports in cooling and heating modes. In cooling and heating modes, the refrigerant flow path is switched from the first connection end 901 and the second connection end 902 to the first connection end 901 and the third connection end 903. This controls the heat absorption of the refrigerant heat dissipation module 700 on the electronic controller, thereby reducing condensation on the surface of the electronic controller and protecting it.

[0056] In some embodiments, a first branch 904 is connected in series between the third connection terminal 903 and the outdoor heat exchanger 300, and a second branch 905 is connected in series between the second connection terminal 902 and the outdoor heat exchanger 300. The refrigerant heat dissipation module 700 is connected in series on the second branch 905, and the first branch 904 and the second branch 905 are connected in parallel. One end of the parallel connection between the second branch 905 and the first branch 904 is connected to one end of the outdoor heat exchanger 900. In cooling mode, the first connection terminal 901 and the second connection terminal 902 are connected. High-pressure refrigerant enters the refrigerant heat dissipation module 700 through the second branch 905 to absorb heat, and then flows out from the refrigerant heat dissipation module 700, passing through the second connection terminal 902 and the first connection terminal 901 to enter the refrigerant circuit 500. The refrigerant is throttled by the throttling component 400 to change the refrigerant state, preparing for the refrigerant to enter the indoor heat exchanger 200 for heat exchange.

[0057] In some embodiments, as shown in the appendix Figures 6 to 8 As shown, the air conditioner may include a first temperature sensor 301, which is used to detect the outdoor ambient temperature.

[0058] In some embodiments, the first preset temperature E1 is set by the user, sent from the cloud, or preset by the factory, and the first preset temperature E1 is the outdoor ambient temperature condensation temperature.

[0059] In some embodiments, the first preset temperature E1 ranges from -7℃ to 7℃.

[0060] In some embodiments, in heating mode, the two-position three-way valve 900 has a first state position and a second state position. In the first state position, the first connection terminal 901 and the second connection terminal 902 are connected, and the refrigerant enters the refrigerant heat dissipation module 700 through the first connection terminal 901 and the second connection terminal 902, so that the refrigerant heat dissipation module 700 dissipates heat from the electronic controller, and then enters the refrigerant circuit 500 through the second branch 905 for refrigerant circulation. In the second state position, the first connection terminal 901 and the third connection terminal 903 are connected, and the refrigerant enters the refrigerant circuit 500 directly through the first branch 904. At this time, the electronic controller dissipates heat through self-heating convection.

[0061] In some embodiments, as shown in the appendix Figures 7 to 10 As shown, the air conditioner may include a controller, which includes an indoor controller and an electronic controller. A first temperature sensor 301 is electrically connected to the controller, and the output of the controller is electrically connected to the solenoid coil of a two-position three-way valve. The controller is configured to: in heating mode, control the first temperature sensor 301 to detect the outdoor ambient temperature and obtain a real-time temperature value; when the outdoor ambient temperature is lower than a first preset temperature E1, control the first connection terminal 901 and the second connection terminal 902 of the two-position three-way valve 900 to connect.

[0062] In the technical solution, under heating mode, the refrigerant temperature after throttling is usually higher than the outdoor ambient temperature condensation temperature. However, there is still a risk of condensation in some operating conditions. The controller determines whether the outdoor ambient temperature is lower than the first preset temperature E1. If the outdoor ambient temperature is lower than the first preset temperature E1, the humidity of the outdoor ambient temperature is extremely low, and there is no risk of condensation for the controller.

[0063] In some embodiments, the air conditioner may include a second temperature sensor 701 for detecting the temperature of the power module in the controller. In heating mode, the controller drives a two-position three-way valve to switch between a first state position and a second state position based on the temperature detected by the second temperature sensor 701.

[0064] In some embodiments, the second preset temperature E2 is the minimum operating temperature that the controller can withstand, and the second preset temperature E2 is set by the controller at the factory.

[0065] In some embodiments, as shown in the appendix Figures 7 to 10 As shown, the controller is configured as follows: the second temperature sensor 701 detects the temperature of the power module and obtains the real-time temperature value; it determines whether the temperature of the controller is less than the second preset temperature E2; if the temperature of the controller is less than the second preset temperature E2, it controls the first connection terminal 901 and the third connection terminal 903 of the two-position three-way valve 900 to connect; if the temperature of the controller is greater than or equal to the second preset temperature E2, the controller re-determines whether the outdoor ambient temperature is less than the first preset temperature E1.

[0066] In the technical solution, during heating mode, the controller determines whether the temperature of the electronic controller is lower than the second preset temperature E2. If the temperature is lower than E2, the controller temperature is too low, approaching the condensation temperature. The refrigerant heat dissipation module 700 needs to reduce its heat dissipation to ensure the controller temperature remains within a safe range, preventing condensation from damaging the controller. The controller connects the first connection terminal 901 and the third connection terminal 903 of the two-position three-way valve 900. The refrigerant circulation bypasses the refrigerant heat dissipation module 700 and directly enters the refrigerant circuit 500 under the control of the two-position three-way valve 900. At this time, the refrigerant heat dissipation module 700 does not dissipate heat from the controller; the controller only dissipates heat through natural convection. If the two-position three-way valve 900 is still in the first state, the refrigerant heat dissipation module 700 continuously absorbs heat from the controller, which can easily cause the controller surface temperature to drop below the condensation temperature, leading to condensation and damage to the controller, thus protecting it.

[0067] In some embodiments, the third preset temperature E3 is the highest operating temperature that the controller can withstand, and the third preset temperature E3 is set by the controller at the factory.

[0068] In some embodiments, the controller is configured such that when the two-position three-way valve 900 enters the second state position, the second temperature sensor 701 detects the temperature of the electronic controller and obtains the real-time temperature value, determines whether the temperature of the electronic controller is greater than the third preset temperature E3, and if so, controls the two-position three-way valve 900 to enter the first state position; if not, it determines whether the outdoor ambient temperature is less than the first preset temperature E1.

[0069] When the controller determines that the temperature of the electronic controller is greater than the third preset temperature E3, the temperature of the electronic controller is greater than its own maximum tolerance temperature. At this time, the electronic controller needs to strengthen heat dissipation to avoid damage to the electronic controller due to excessive operating temperature. Therefore, the refrigerant heat dissipation module 700 needs to increase the heat absorption capacity of the electronic controller. The controller controls the first connection terminal 901 and the second connection terminal 902 of the two-position three-way valve 900 to connect, so that the refrigerant flows through the refrigerant heat dissipation module 700. At this time, the refrigerant heat dissipation module 700 absorbs heat from the electronic controller to ensure that the temperature of the electronic controller is lower than the maximum tolerance temperature, so that the electronic controller can operate normally.

[0070] When the controller determines that the temperature of the electronic controller is less than or equal to the third preset temperature E3, the temperature of the electronic controller is within its normal operating tolerance temperature range. At this time, the controller does not need to control the two-position three-way valve 900 to switch to the first state position, and the two-position three-way valve 900 remains in the second state position.

[0071] In some embodiments, the air conditioner may further include a third temperature sensor 302 disposed on the coil of the outdoor heat exchanger 300. The third temperature sensor 302 is used to detect the temperature of the surface of the coil of the outdoor heat exchanger 300, which is close to the evaporation temperature.

[0072] In some embodiments, the reliability of humidity sensor detection is easily affected by the outdoor environment, and the cost of using and maintaining humidity sensors is high. Therefore, to save costs and increase the reliability of humidity detection, an outdoor operating condition humidity factor is derived through experimental data and formula derivation. The larger the outdoor operating condition humidity factor, the higher the outdoor relative humidity.

[0073] In some embodiments, the outdoor operating humidity factor Ty is defined as follows: Ty = (Tout_base - Tout) + (Te - Te_base) + KF * (FF_base), where Tout_base is the preset outdoor temperature, Tout is the outdoor ambient temperature, in heating mode, the outdoor heat exchanger 300 is the evaporator, Te_base is the preset evaporation temperature corresponding to the outdoor wind speed, Te is the evaporation temperature, KF is the preset frequency coefficient corresponding to the wind speed, F is the operating frequency of the compressor 100, and F_base is the operating frequency corresponding to the wind speed.

[0074] Experiments show that relative humidity is a linear function of air moisture content, and evaporation temperature is also a linear function of relative humidity. When humid air flows through a low-temperature evaporator, heat exchange occurs. The higher the relative humidity of the air, the higher the dew point temperature. Therefore, in order to continuously condense water, the evaporation temperature will increase accordingly. That is, the higher the relative humidity, the higher the evaporation temperature, meaning that relative humidity is positively correlated with (Te-Te group).

[0075] Since there is no throttling component between the throttling element 400 and the outdoor heat exchanger 300, the refrigerant temperature after passing through the throttling element 400 is positively correlated with the evaporation temperature at the same relative humidity. As the outdoor temperature decreases, the evaporation temperature increases approximately linearly, meaning the evaporation temperature is positively correlated with the outdoor temperature. Furthermore, since the relative humidity is positively correlated with the evaporation temperature, the relative humidity is also positively correlated with the outdoor temperature, i.e., (Toutbase - Tout).

[0076] Under the same conditions of relative humidity, outdoor temperature, and outdoor fan speed, the evaporation temperature decreases as the operating frequency increases, meaning that the evaporation temperature is negatively correlated with the operating frequency. Since relative humidity is positively correlated with the evaporation temperature, relative humidity is negatively correlated with the operating frequency, i.e., with (FF base).

[0077] In some embodiments, the first humidity preset value is the standard humidity value of the environment where the outdoor heat exchanger 300 is located, and the first humidity preset value is set by the factory.

[0078] In some embodiments, as shown in the appendix Figures 7 to 10 As shown, the controller is configured to: when the two-position three-way valve 900 is in the second state position and the temperature of the controller is less than or equal to the third preset temperature E3, determine whether the outdoor ambient temperature is less than the first preset temperature E1. If yes, control the two-position three-way valve 900 to remain in the second state position; if no, determine whether the outdoor operating humidity factor is less than the first preset humidity value. If yes, control the two-position three-way valve 900 to enter the first state position; if no, the two-position three-way valve 900 remains in the second state position.

[0079] When the temperature of the electronic controller is lower than the third preset temperature E3 and the outdoor ambient temperature is lower than the first preset temperature E1, the outdoor temperature is low and the moisture content in the air is low, resulting in a low dew point temperature. Since the electronic controller generates heat during continuous operation, the surface temperature of the electronic controller is unlikely to fall below the dew point temperature. Under these circumstances, the risk of condensation is extremely low. Therefore, the controller controls the two-position three-way valve 900 to remain in the second state position, and the electronic controller can be cooled by natural convection alone.

[0080] When the temperature of the electronic controller is lower than the third preset temperature E3, and the outdoor ambient temperature is greater than or equal to the first preset temperature, the controller checks whether the outdoor humidity factor Ty is less than the first preset humidity value. If the outdoor humidity factor Ty is less than the first preset humidity value, there is no risk of condensation. The controller then controls the two-position three-way valve 900 to enter the first state position. The controller continues to control the state of the two-position three-way valve 900 based on the temperature of the electronic controller and the second preset temperature.

[0081] If the outdoor humidity condition factor Ty is greater than or equal to the first preset humidity value, there is a risk of condensation. The controller will keep the two-position three-way valve 900 in the second state. At this time, due to the high outdoor temperature, the air conditioner is operating in a low-load heating state, and the compressor operates at a low frequency. Therefore, the module temperature cooling requirement is low. At this time, natural convection is sufficient to cool the controller. Since the controller temperature is higher than the ambient temperature, it is also higher than the dew point temperature, and condensation will not occur on the controller surface.

[0082] In some embodiments, as shown in the appendix Figures 7 to 10 As shown, the controller is configured to: when the outdoor humidity factor Ty is greater than or equal to the first preset humidity value, determine whether the temperature of the controller is greater than the third preset temperature E3. If yes, control the two-position three-way valve 900 to enter the first state position and run for the first preset time t; if no, control the two-position three-way valve 900 to be in the second state position and continue to determine whether the temperature of the controller is greater than the third preset temperature E3.

[0083] When the outdoor humidity factor Ty is greater than or equal to the first preset humidity value and the temperature of the controller is greater than the third preset temperature E3, the controller controls the two-position three-way valve 900 to switch from the second state position to the first state position. At this time, the first connection terminal 901 and the second connection terminal 902 of the two-position three-way valve 900 are connected. The refrigerant enters the refrigerant heat dissipation module 700 through the second connection terminal 902. The heat absorption capacity of the refrigerant heat dissipation module 700 for the controller is enhanced, thereby realizing rapid heat dissipation of the controller to avoid damage to the controller due to excessive temperature.

[0084] When the temperature of the controller is less than or equal to the third preset temperature, it indicates that the temperature of the controller has not exceeded the maximum operating temperature of the controller and the controller will not be damaged. Therefore, the controller controls the two-position three-way valve 900 to be in the second state position, that is, the first connection terminal 901 and the second connection terminal 902 are connected, and the refrigerant enters the refrigerant circuit 500 through the first branch 904. The controller dissipates heat under the action of natural convection.

[0085] In some embodiments, the first preset time t is derived using the formula: t = (AW + BF) / (CTout). Where A is the preset outdoor unit speed, W is the outdoor fan speed, B is the preset compressor 100 frequency, F is the compressor 100 frequency, C is the preset time coefficient of the ambient temperature, and Tout is the ambient temperature. The higher the outdoor fan speed and the higher the compressor 100 frequency, the higher the temperature of the controller. Therefore, the refrigerant cooling module 700 absorbs heat from the controller, resulting in a larger temperature range for lowering the controller temperature to the dew point temperature. At this time, it is necessary to strengthen the heat dissipation of the controller, and the controller controls the two-position three-way valve 900 to remain in the first state position for a longer period.

[0086] In some other embodiments, the air conditioner includes a second four-way valve located on a pipe between the outlet of the condenser and the inlet of the evaporator, and the second four-way valve is connected to the throttling component 400 and the refrigerant heat dissipation module 700.

[0087] In some embodiments, the second four-way valve includes a first connection port, which is connected to one end of the refrigerant heat dissipation module 700.

[0088] In some embodiments, the second four-way valve includes a second connection port that is connected to one end of the outdoor heat exchanger 300.

[0089] In some embodiments, the second four-way valve includes a third connection port, and the throttling component 400 is connected in series between the refrigerant heat dissipation module 700 and the third connection port.

[0090] In some embodiments, the second four-way valve includes a fourth connection port that is connected to one end of the indoor heat exchanger 200.

[0091] In cooling mode, after the refrigerant flows out of the compressor 100, it passes through the outdoor heat exchanger 300, the second connection port, the first connection port, the refrigerant heat dissipation module 700, the throttling component 400, the third connection port, and the fourth connection port in sequence before entering the indoor heat exchanger 200. After heat exchange, it returns to the compressor 100 to complete the cycle.

[0092] In heating mode, after the refrigerant flows out of the compressor 100, it passes through the indoor heat exchanger 200, the fourth connection port, the first connection port, the refrigerant heat dissipation module 700, the throttling component 400, the third connection port, and the second connection port in sequence, and enters the outdoor heat exchanger 300. After heat exchange, it returns to the compressor 100 to complete the cycle.

[0093] By setting a second four-way valve, in both cooling and heating modes, the refrigerant in high-pressure state after heat exchange in the condenser first dissipates heat to the power module through the refrigerant heat dissipation module 700, and then changes its temperature state through the throttling component 400. This reduces the risk of condensation on the surface of the electronic controller, ensuring that the refrigerant heat dissipation module 700 can still operate normally even with only one throttling component 400 in the air conditioner, thereby reducing the cost of the throttling component in the air conditioner.

[0094] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. An air conditioner, characterized in that, It includes: The refrigerant circuit, in which the refrigerant circulates sequentially through the compressor, condenser, a single throttling component, and evaporator; An indoor heat exchanger and an outdoor heat exchanger, one of which functions as an evaporator and the other as a condenser; The first four-way valve is used to switch the refrigerant flow direction in the refrigerant circuit so that the indoor heat exchanger and the outdoor heat exchanger can switch between the condenser and the evaporator; A refrigerant heat dissipation module is installed in the refrigerant circuit and located on the pipeline between the outlet of the condenser and the inlet of the evaporator, so as to use the cooling capacity of the refrigerant to dissipate heat from the power module. A single reversing valve is provided on the pipeline between the outlet of the condenser and the inlet of the evaporator, and the reversing valve is connected to the throttling component and the refrigerant heat dissipation module; In cooling mode, the reversing valve causes the refrigerant flowing out of the condenser outlet to pass sequentially through the refrigerant heat dissipation module and the throttling component into the evaporator.

2. The air conditioner according to claim 1, characterized in that, The reversing valve is a four-way reversing valve, and the four-way reversing valve includes: The first port is connected to one end of the refrigerant heat dissipation module; The second port is connected to one end of the outdoor heat exchanger; The third port is connected in series between the refrigerant heat dissipation module and the third port; The fourth port is connected to one end of the indoor heat exchanger; In cooling mode, the first port is connected to the second port, and the third port is connected to the fourth port.

3. The air conditioner according to claim 2, characterized in that, A first refrigerant pipeline is connected between the first port and the third port, and the refrigerant heat dissipation module and the throttling component are connected in series on the first refrigerant pipeline.

4. The air conditioner according to claim 2, characterized in that, The coils of the first four-way valve and the reversing four-way valve are connected in parallel so that the first four-way valve and the reversing four-way valve are simultaneously energized or de-energized.

5. The air conditioner according to claim 1, characterized in that, The reversing valve is a two-position three-way valve, which is connected between the outdoor heat exchanger and the throttling component. The two-position three-way valve includes: The first connection end is connected to one end of the throttling component; The third connection terminal is connected to one end of the outdoor heat exchanger; The second connection terminal is connected to the third connection terminal via the refrigerant heat dissipation module.

6. The air conditioner according to claim 5, characterized in that, The third connection terminal is connected in series with the outdoor heat exchanger via a first branch; the second connection terminal is connected in series with the outdoor heat exchanger via a second branch; and the refrigerant heat dissipation module is connected in series with the second branch.

7. The air conditioner according to claim 5, characterized in that, The conduction state of the two-position three-way valve includes a first state position in which the first connection end and the second connection end are connected, and a second state position in which the first connection end and the third connection end are connected. In heating mode, the two-position three-way valve switches between the first state position and the second state position. When the two-position three-way valve is in the first state position, the refrigerant flowing out of the indoor heat exchanger enters the outdoor heat exchanger through the throttling component, the two-position three-way valve, and the refrigerant heat dissipation module in sequence. When the two-position three-way valve is in the second state position, the refrigerant flowing out of the indoor heat exchanger enters the outdoor heat exchanger through the throttling component and the two-position three-way valve.

8. The air conditioner according to claim 7, characterized in that, The air conditioner also includes a controller and a first temperature sensor. The first temperature sensor is used to detect the outdoor ambient temperature. The first temperature sensor is electrically connected to the controller, and the output terminal of the controller is electrically connected to the solenoid coil of the two-position three-way valve.

9. The air conditioner according to claim 8, characterized in that, The air conditioner also includes a second temperature sensor electrically connected to the controller, the second temperature sensor being used to detect the temperature of the power module; In heating mode, the controller drives the two-position three-way valve to switch from the first state position to the second state position based on the temperature detected by the second temperature sensor.

10. An air conditioner, characterized in that, It includes: The refrigerant circuit, in which the refrigerant circulates sequentially through the compressor, condenser, a single throttling component, and evaporator; An indoor heat exchanger and an outdoor heat exchanger, one of which functions as an evaporator and the other as a condenser; The first four-way valve is used to switch the refrigerant flow direction in the refrigerant circuit so that the indoor heat exchanger and the outdoor heat exchanger can switch between the condenser and the evaporator; A refrigerant heat dissipation module is located in the refrigerant circuit and connected to the throttling component to dissipate heat from the power module using the cooling capacity of the refrigerant. The second four-way valve is located on the pipeline between the outlet of the condenser and the inlet of the evaporator. The second four-way valve is connected to the throttling component and the refrigerant heat dissipation module. In either cooling or heating mode, the second four-way valve causes the refrigerant flowing out of the condenser outlet to first pass through the refrigerant heat dissipation module and then through the throttling component.

Images