Air conditioner

Abstract

The utility model relates to the technical field of air conditioning equipment, in particular to an air conditioner. Specifically, the air conditioner comprises a refrigerant circulation system, an electric control board and a cooling pipeline, and the refrigerant circulation system comprises a compressor, a reversing valve, an outdoor unit heat exchanger, a throttling valve and an indoor unit heat exchanger which are sequentially connected through a refrigeration circulation pipeline. The first end of the cooling pipeline communicates with a refrigerant circulating pipeline located between the throttling valve and the outdoor unit heat exchanger or the indoor unit heat exchanger, the other end of the cooling pipeline is blocked, a heat dissipation plate is arranged on the high-temperature area of the electric control board, and the cooling pipeline is arranged on the heat dissipation plate. And heat emitted by the high-temperature area is taken away by a refrigerant introduced into the refrigerant circulating system. The cooling pipeline is arranged on the heat dissipation plate of the electric control board, and the cooling pipeline can introduce a refrigerant of the refrigerant circulation system, take away heat dissipated by a high-temperature area on the electric control board and transmit the heat to the refrigerant circulation pipeline so as to cool the electric control board.

Description

Technical Field

[0001] The utility model relates to the technical field of air conditioning equipment, in particular to an air conditioner. Background Art

[0002] The high-power electric control device is set in the strong electric area of the air conditioner's electric control panel, which causes high heat in this area and difficulty in heat dissipation. The above-mentioned high-power electric control devices mainly include IPM (Intelligent Power Module), IGBT (Insulated Gate Bipolar Transistor), diode, rectifier bridge, etc. Among them, the heat generated by IPM accounts for about 60% of the total heat generation and has the highest heat flux density.

[0003] In the prior art, air cooling is generally used to dissipate heat from the electric control board. However, air cooling requires additional heat dissipation components to be added to the air conditioner, which takes up a large space and has a poor cooling effect.

[0004] Therefore, this field needs a new technical solution to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above technical problem, that is, to solve the problem that the existing cooling scheme for the electric control panel of the air conditioner is not good.

[0006] In a first aspect, the utility model provides an air conditioner, the air conditioner comprising a refrigerant circulation system, an electric control panel and a cooling pipeline.

[0007] The refrigerant circulation system includes a compressor, a reversing valve, an outdoor unit heat exchanger, a throttle valve and an indoor unit heat exchanger which are sequentially connected by a refrigerant circulation pipeline. The reversing valve is used to change the flow direction of the refrigerant in the refrigerant circulation system so that the air conditioner operates in a cooling mode or a heating mode. The first end of the cooling pipeline is communicated with the refrigerant circulation pipeline located between the throttle valve and the outdoor unit heat exchanger or the indoor unit heat exchanger, and the other end of the cooling pipeline is blocked.

[0008] A heat sink is provided on the high temperature area of the electric control board, and the cooling pipeline is arranged on the heat sink. The refrigerant introduced into the refrigerant circulation system takes away the heat emitted from the high temperature area.

[0009] In a preferred technical solution of the above air conditioner, the first end of the cooling pipeline is connected to the refrigerant circulation pipeline located between the throttle valve and the outdoor unit heat exchanger.

[0010] In a preferred technical solution of the above air conditioner, the cooling pipe is arranged upward from its first end to its second end.

[0011] In the preferred technical solution of the above air conditioner, the number of the cooling pipelines is at least two.

[0012] In the preferred technical solution of the above air conditioner, the heat dissipation plate includes a first plate body and a second plate body which are fixedly connected, the first plate body and the second plate body are arranged oppositely, and the cooling pipelines are located between the first plate body and the second plate body.

[0013] In the preferred technical solution of the above air conditioner, a first groove is arranged on one side of the first plate body opposite to the second plate body, a second groove is arranged on one side of the second plate body opposite to the first plate body, the first groove and the second groove jointly define a pipe groove, and the cooling pipelines are located in the pipe groove.

[0014] In the preferred technical solution of the above air conditioner, the cooling pipelines are attached to the inner wall of the pipe groove.

[0015] In the preferred technical solution of the above air conditioner, the first plate body and the second plate body are detachably and fixedly connected.

[0016] In the preferred technical solution of the above air conditioner, a heat-conducting medium is arranged between the cooling pipelines and the heat dissipation plate.

[0017] In the preferred technical solution of the above air conditioner, the electronic control board is installed in the outdoor unit of the air conditioner; and / or the reversing valve is a four-way reversing valve.

[0018] In the case of adopting the above technical solution, the air conditioner of the present utility model arranges the cooling pipelines on the heat dissipation plate of the electronic control board. The cooling pipelines can introduce the refrigerant in the refrigerant circulation system, take away the heat dissipated from the high-temperature area on the electronic control board, and transfer the heat to the refrigerant circulation pipeline to cool down the electronic control board.

[0019] Furthermore, the present utility model makes the first end of the cooling pipeline communicate with the refrigerant circulation pipeline located between the throttle valve and the outdoor unit heat exchanger and makes the cooling pipeline set upward from its first end to its second end. When the air conditioner operates in the heating mode, it is beneficial to reduce the risk of condensation on the electronic control board. Description of the Drawings

[0020] The following describes the preferred embodiments of the present utility model with reference to the drawings, in which:

[0021] Figure 1 is a schematic diagram of the refrigerant circulation system of the air conditioner of the present utility model;

[0022] Figure 2 is a schematic diagram of the structure of the electronic control box and the cooling pipelines of the air conditioner of the present utility model;

[0023] Figure 3 is a schematic structural diagram of the electronic control board and the cooling pipeline of the air conditioner of the present utility model;

[0024] Figure 4 is a schematic structural diagram of the heat dissipation plate and the cooling pipeline of the air conditioner of the present utility model;

[0025] Figure 5 is an exploded view of the heat dissipation plate and the cooling pipeline of the air conditioner of the present utility model.

[0026] List of reference numerals:

[0027] 110, compressor; 120, reversing valve; 130, outdoor heat exchanger; 140, throttle valve; 150, indoor heat exchanger; 160, cooling pipeline; 210, heat dissipation plate; 211, first plate body; 212, second plate body; 213, first groove; 214, second groove; 220, electric control box; 230, electronic control board. Specific embodiments

[0028] The following describes the preferred embodiments of the present utility model with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principle of the present utility model and are not intended to limit the protection scope of the present utility model.

[0029] It should be noted that in the description of the present utility model, the terms indicating directions or positional relationships such as "upper", "lower", "top", "bottom", etc. are based on the directions or positional relationships shown in the drawings. This is only for convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In addition, it should also be noted that in the description of the present utility model, unless otherwise clearly specified and limited, the terms "set", "connected", "installed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0031] Specifically, the present utility model provides an air conditioner. The air conditioner of the present utility model includes an outdoor unit, an indoor unit, and an electronic control board 230. The outdoor unit and the indoor unit are connected to each other through a refrigerant circulation pipeline and an electrical circuit. The refrigerant circulation pipeline is used to connect the refrigeration components in the indoor unit and the refrigeration components in the outdoor unit into a refrigerant circulation loop, and the heat exchange between the indoor and outdoor is realized through the circulating flow of the refrigerant.

[0032] As Figure 1 shown, the indoor unit includes an indoor heat exchanger 150, an indoor fan (not shown in the figure), etc. It can be set in various structures such as wall-mounted, floor-standing or ceiling-mounted. The indoor fan is used to promote the formation of an air flow flowing through the indoor heat exchanger 150 to adjust the temperature of the indoor environment.

[0033] As Figure 1 shown, the outdoor unit includes components such as a compressor 110, an outdoor heat exchanger 130, an outdoor fan (not shown in the figure), and a throttle valve 140. The compressor 110 preferably uses a variable-frequency compressor driven by a variable-frequency motor. According to the refrigeration demand, its speed is adjusted, and the refrigeration capacity of the air conditioner is increased by increasing the speed of the compressor 110. The compressor 110 is used to provide the power for the refrigerant cycle under the drive of the electronic control board 230. By adjusting the power supply frequency through the electronic control board 230, the speed adjustment is realized. The outdoor fan generates a heat dissipation air flow for dissipating heat from the outdoor heat exchanger 130.

[0034] Among them, the electronic control board 230 is preferably arranged at the outdoor unit and is also called the outdoor unit electronic control board. The electronic control board 230 is used to control the operating state of the outdoor unit, including a variable-frequency device for driving the compressor 110, such as an IPM (Intelligent Power Module). When the electronic control board 230 drives the compressor 110 to operate, its power components generate heat. As the refrigeration load increases and the state change frequency increases, the heat generation amount may increase. Among them, the IPM is the component with the largest heat generation amount and is generally also the component with the highest temperature.

[0035] The speed of the compressor 110 is adjusted according to the refrigeration demand. Thus, the refrigeration capacity of the air conditioner is increased by increasing the speed of the compressor 110. The variable-frequency air conditioner uses variable-frequency technology to improve the electric energy efficiency and reduce the temperature fluctuation. Among them, the variable-frequency technology processes the alternating current of the power grid through a series of processes such as rectification, filtering, and inversion to change the power supply frequency of the compressor 110, and its function is generally realized through the electronic control board 230. Since the variable-frequency technology itself is well-known to those skilled in the art, it will not be elaborated here.

[0036] Preferably, as Figure 1 shown, the refrigerant circulation pipeline connects the compressor 110, the outdoor heat exchanger 130, the throttle valve 140, and the indoor heat exchanger 150 in sequence to form a refrigerant circulation system. The compressor 110, as the power of the refrigeration cycle, is driven by an electric motor to rotate continuously, providing the power for the refrigerant circulation. The throttle valve 140 is preferably set as an electronic expansion valve.

[0037] Preferably, as Figure 1As shown, the refrigerant circulation system of the present utility model further includes a reversing valve 120, which is connected to the exhaust port of the compressor 110 and is used to change the flow direction of the refrigerant in the refrigerant circulation system, so that the air conditioner operates in a refrigeration mode or a heating mode.

[0038] Figure 1 The direction of the solid arrow in the figure is the flow direction of the refrigerant when the air conditioner operates in the refrigeration mode. In the refrigeration mode, under the action of the compressor 110, the refrigerant flows through the reversing valve 120 to the outdoor heat exchanger 130, and then returns to the compressor 110 after passing through the throttle valve 140 and the indoor heat exchanger 150.

[0039] Figure 1 The direction of the dashed arrow in the figure is the flow direction of the refrigerant when the air conditioner operates in the heating mode. In the heating mode, under the action of the compressor 110, the refrigerant flows through the reversing valve 120 to the indoor heat exchanger 150, and then returns to the compressor 110 after passing through the throttle valve 140 and the outdoor heat exchanger 130.

[0040] In some preferred embodiments, the reversing valve 120 preferably adopts a four-way reversing valve.

[0041] The electric control box 220 of the air conditioner is generally arranged on the outdoor unit. As Figure 2 and Figure 3 shown, the electric control board 230 is arranged in the electric control box 220. A heat dissipation plate 210 is arranged on the electric control board 230. The heat dissipation plate 210 is arranged at the high-temperature area of the electric control board 230, and by absorbing the heat dissipated during the operation of the electric control board 230, the heat dissipation of the electric control board 230 is accelerated.

[0042] Among them, the heat dissipation plate 210 is generally made of aluminum or other heat-conducting materials. The shape of the heat dissipation plate 210 is generally adapted to the structure of the electric control board 230 and can at least cover the high-temperature area of the electric control board 230 (i.e., cover the power devices of the electric control board 230). The heat dissipation plate 210 is generally fixed to the electric control board 230 by means of screws or bonding. A positioning structure can be arranged on the side of the heat dissipation plate 210 that abuts against the electric control board 230, and heat-conducting silica gel or the like can be attached, so as to reduce the thermal resistance. In some preferred embodiments, the heat dissipation plate 210 can be a rectangular plate body, with one side abutting against the electric control board 230.

[0043] Preferably, as Figures 1 to 5 shown, the air conditioner of the present utility model further includes a cooling pipeline 160. The first end of the cooling pipeline 160 is communicated with the refrigerant circulation pipeline located between the throttle valve 140 and the outdoor heat exchanger 130. The second end of the cooling pipeline 160 is blocked. The cooling pipeline 160 is arranged on the heat dissipation plate 210, and the heat dissipated from the high-temperature area is taken away by introducing the refrigerant of the refrigerant circulation system.

[0044] When the air conditioner is operating, the low-temperature refrigerant in the refrigerant circulation pipeline flows into the cooling pipeline 160, and the heat dissipated by the heat dissipation plate 210 is transferred to the refrigerant circulation pipeline through the cooling pipeline 160 and the refrigerant in the cooling pipeline 160, thereby cooling the electronic control board 230.

[0045] Specifically, when the air conditioner operates in the cooling mode:

[0046] As Figure 1 shown by the solid arrows in the figure, the liquid refrigerant from the outdoor heat exchanger 130 fills the cooling pipeline 160. The liquid refrigerant transfers the relatively low temperature of the refrigerant circulation pipeline to the cooling pipeline 160 (natural convection inside the pipe + heat conduction of the pipe), and the liquid refrigerant cools the electronic control board 230 through the heat dissipation plate 210.

[0047] When the air conditioner operates in the heating mode:

[0048] As Figure 1 shown by the dashed arrows in the figure, the liquid refrigerant from the indoor heat exchanger 150 is throttled by the throttle valve 140, and then the low-temperature refrigerant fills the cooling pipeline 160, and cools the electronic control board 230 through the heat dissipation plate 210.

[0049] It should be noted that those skilled in the art can also connect the first end of the cooling pipeline 160 to the refrigerant circulation pipeline located between the throttle valve 140 and the indoor heat exchanger 150 in actual application. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should all be limited within the protection scope of the present invention.

[0050] Certainly, the present invention preferably connects the first end of the cooling pipeline 160 to the refrigerant circulation pipeline located between the throttle valve 140 and the outdoor heat exchanger 130.

[0051] Preferably, the cooling pipeline 160 is arranged upward from its first end to its second end.

[0052] By arranging the cooling pipeline 160 upward from its first end to its second end, that is to say, the second end of the cooling pipeline 160 is higher than the first end of the cooling pipeline 160. When the air conditioner operates in the heating mode, it is beneficial to reduce the risk of condensation on the electronic control board 230.

[0053] Specifically, when the air conditioner operates in the heating mode, as Figure 1As shown by the dashed arrow in the figure, the liquid refrigerant from the indoor unit heat exchanger 150 becomes a low-temperature gas-liquid mixed refrigerant after throttling by the throttle valve 140. By arranging the cooling pipeline 160 to be upward from its first end to its second end, the gaseous refrigerant fills the cooling pipeline 160, and there is no low-temperature liquid refrigerant in the cooling pipeline 160. The low-temperature gaseous refrigerant can cool the electronic control board 230. Moreover, compared with the liquid refrigerant, the gaseous refrigerant has a lower heat absorption capacity, which is conducive to avoiding the temperature of the electronic control board 230 from being too low, and further conducive to reducing the risk of condensation on the electronic control board 230.

[0054] Preferably, the connection point of the cooling pipeline 160 and the refrigerant circulation pipeline is closer to the throttle valve 140.

[0055] Preferably, as Figures 1 to 5 shown, the number of the cooling pipelines 160 is two.

[0056] Exemplarily, the two cooling pipelines 160 are spaced apart along the width direction of the heat dissipation plate 21.

[0057] Among them, the number of the cooling pipelines 160 is not limited to two. For example, it can also be set to more. By setting multiple cooling pipelines 160, the cooling effect on the electronic control board 230 can be improved.

[0058] Preferably, a heat-conducting medium is provided between the cooling pipeline 160 and the heat dissipation plate 210.

[0059] Among them, the heat-conducting medium can be heat-conducting silica gel or the like.

[0060] Preferably, as Figures 3 to 5 shown, the heat dissipation plate 210 of the present utility model includes a first plate body 211 and a second plate body 212 which are fixedly connected. The first plate body 211 and the second plate body 212 are arranged oppositely, and the cooling pipeline 160 is located between the first plate body 211 and the second plate body 212.

[0061] Exemplarily, one side of the first plate body 211 is used to cover the high-temperature area on the electronic control board 230. Generally, the first plate body 211 fixes itself to the high-temperature area of the electronic control board 230 by setting fasteners or using adhesives or the like. The first plate body 211 and the second plate body 212 can generally be connected by fasteners or adhesives or the like.

[0062] Preferably, as Figure 4 and Figure 5 shown, the first plate body 211 and the second plate body 212 are detachably and fixedly connected.

[0063] Preferably, as Figure 4 and Figure 5As shown, on one side of the first plate body 211 facing the second plate body 212, there is a first groove 213, and on one side of the second plate body 212 facing the first plate body 211, there is a second groove 214. The first groove 213 and the second groove 214 jointly define a pipe groove, and the cooling pipeline 160 is located in the pipe groove.

[0064] Exemplarily, the first plate body 211 is located above the second plate body 212. The top surface of the first plate body 211 covers the high-temperature area on the electronic control board 230. The number of the first grooves 213 is two and they are provided on the bottom surface of the first plate body 211. The number of the second grooves 214 is two and they are provided on the top surface of the second plate body 212. The two second grooves 214 respectively correspond to the two first grooves 213. After the first plate body 211 and the second plate body 212 are buckled together, the two first grooves 213 and the two second grooves 214 jointly define two pipe grooves for passing through the two cooling pipelines 160. The heat dissipation plate 210 forms the pipe groove by combining plate bodies, which is not only convenient for preparation and maintenance, but also convenient for the heat dissipation plate 210 to be connected to the electronic control board 230 itself.

[0065] Preferably, the cooling pipeline 160 is in fit with the inner wall of the pipe groove.

[0066] Wherein, the cross-sectional shape of the pipe groove is adapted to the shape of the cooling pipeline 160, and can be set as circular, oval, square, rectangular, etc. For example. In this embodiment, it is preferably to use a circular cooling pipeline 160 and a pipe groove with a circular cross-section. A heat-conducting medium such as heat-conducting silica gel is also coated between the cooling pipeline 160 and the inner wall of the pipe groove.

[0067] Those skilled in the art can understand that although some embodiments described herein include certain features included in other embodiments rather than other features, the combination of features of different embodiments means that it is within the scope of this application and forms different embodiments. For example, in the claims of this application, any one of the claimed embodiments can be used in any combination.

[0068] So far, the technical solution of the present utility model has been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present utility model is obviously not limited to these specific embodiments. Without departing from the principle of the present utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present utility model.

Claims

1. An air conditioner, characterized in that, The air conditioner includes a refrigerant circulation system, an electric control panel and a cooling pipeline. The refrigerant circulation system includes a compressor, a reversing valve, an outdoor unit heat exchanger, a throttle valve and an indoor unit heat exchanger which are sequentially connected by a refrigerant circulation pipeline. The reversing valve is used to change the flow direction of the refrigerant in the refrigerant circulation system so that the air conditioner operates in a cooling mode or a heating mode. The first end of the cooling pipeline is communicated with the refrigerant circulation pipeline located between the throttle valve and the outdoor unit heat exchanger or the indoor unit heat exchanger, and the second end of the cooling pipeline is blocked. A heat sink is provided on the high temperature area of the electric control board, and the cooling pipeline is arranged on the heat sink. The refrigerant introduced into the refrigerant circulation system takes away the heat emitted from the high temperature area.

2. The air conditioner according to claim 1, characterized in that, The first end of the cooling pipeline is communicated with the refrigerant circulation pipeline between the throttle valve and the outdoor unit heat exchanger.

3. The air conditioner according to claim 2, characterized in that, The cooling pipe is arranged upward from its first end to its second end.

4. The air conditioner according to claim 1, wherein, The number of the cooling pipelines is at least two.

5. The air conditioner according to claim 1, wherein The heat sink comprises a first plate body and a second plate body which are fixedly connected, the first plate body and the second plate body are arranged opposite to each other, and the cooling pipeline is located between the first plate body and the second plate body.

6. The air conditioner according to claim 5, characterized in that, A first groove is provided on a side of the first plate body opposite to the second plate body, and a second groove is provided on a side of the second plate body opposite to the first plate body. The first groove and the second groove together define a pipe groove, and the cooling pipeline is located in the pipe groove.

7. The air conditioner according to claim 6, characterized in that, The cooling pipeline is in contact with the inner wall of the pipe groove.

8. The air conditioner according to claim 5, wherein The first plate body and the second plate body are detachably fixedly connected.

9. The air conditioner according to claim 1, characterized in that, A heat conducting medium is provided between the cooling pipeline and the heat sink.

10. The air conditioner according to any one of claims 1 to 9, characterized in that, The electric control panel is installed in the outdoor unit of the air conditioner; and / or The reversing valve is a four-way reversing valve.

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