Air conditioning system

Abstract

The invention discloses an air conditioning system. The air conditioning system comprises a refrigerant circulation system and an electric control box device, the refrigerant circulation system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, a first throttling component, a second throttling component, an air cooler and an electric control heat dissipation component, the outdoor heat exchanger, the first throttling component, the electric control heat dissipation component, the second throttling component, the air cooler and the indoor heat exchanger are connected in sequence to form a circulation loop, the electric control heat dissipation component is thermally connected to the electric control box device to dissipate heat from the electric control box device, the electric control box device is provided with a heat dissipation duct for air to flow through, and the air cooler is located on the air inlet side of the heat dissipation duct. The air conditioning system of the invention can dissipate heat from the electric control box device when the ambient temperature is high, avoid a large temperature difference between the airflow and the inside of the electric control box device, which causes the inside of the electric control box device to be damp and damaged, thereby improving the refrigeration effect under the condition of high outdoor ambient temperature and improving the user's comfort.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to an air conditioning system. Background Art

[0002] The power devices of the air conditioner electronic control will generate heat during operation, and as the power of the electronic control increases, the heat generated will also increase; if the heat cannot be dissipated in time, the temperature of the power device will increase. The greater the heat, the higher the temperature. When the temperature exceeds the critical operating temperature of the device, the device will be damaged. Therefore, in the air-conditioning system, it is very important to design a good heat dissipation for the electronic control, which is related to whether the air conditioner can operate reliably, continuously and at full load. However, in the related technology, air cooling dissipates heat for the electronic control through air convection, and refrigerant cooling uses a refrigerant equivalent to the ambient temperature to dissipate heat for the electronic control. In a high temperature environment, the air flow and refrigerant temperature flowing through the electronic control are high, and the temperature of the electronic control cannot be reduced to a reliable temperature range, causing the air conditioner to need to reduce the frequency of operation to reduce the heat generation of the electronic control, affecting the cooling effect of the air conditioner. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0004] To this end, one object of the present invention is to propose an air-conditioning system that can use a low-temperature refrigerant to dissipate heat to an electronic control box device, and can avoid a large temperature difference between the airflow and the interior of the electronic control box device during air cooling, which would cause the interior of the electronic control box device to become damp and damaged, thereby improving the cooling effect when the outdoor environment temperature is high and improving the user's comfort.

[0005] According to an air-conditioning system of an embodiment of the present invention, the air-conditioning system includes: a refrigerant circulation system and an electronic control box device, the refrigerant circulation system includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, a first throttling component, a second throttling component, an air cooler and an electronically controlled heat dissipation component, the first throttling component is connected between the outdoor heat exchanger and the second throttling component, the second throttling component is connected between the indoor heat exchanger and the first throttling component, the electronically controlled heat dissipation component includes a first refrigerant pipe, the first refrigerant pipe is connected between the first throttling component and the second throttling component, the air cooler includes a second refrigerant pipe, the second refrigerant pipe is connected between the second throttling component and the indoor heat exchanger, the electronically controlled heat dissipation component is thermally connected to the electronic control box device for heat dissipation of the electronic control box device, the electronic control box device is provided with a heat dissipation duct for air to flow through, the air cooler is located on the air inlet side of the heat dissipation duct, and is used to cool the air flowing to the heat dissipation duct.

[0006] The air-conditioning system according to the embodiment of the present invention can use low-temperature refrigerant to dissipate the heat of the electric control box device, and can avoid a large temperature difference between the airflow and the inside of the electric control box device during air cooling, which may cause the inside of the electric control box device to become damp and damaged, thereby improving the cooling effect when the outdoor environment temperature is high and improving the user's comfort.

[0007] Optionally, the refrigerant circulation system also includes a reversing component, the air-conditioning system has a cooling mode and a heating mode, the reversing component is used to switch between the cooling mode and the heating mode, the second throttling component is a one-way throttle valve, and in the cooling mode, the second throttling component throttles in one direction.

[0008] Optionally, at least a portion of the second refrigerant pipe is bent and extended.

[0009] Optionally, the air cooler further comprises a plurality of cooling fins, each of the cooling fins being provided with a through hole, the second refrigerant pipe being passed through the through holes of the plurality of cooling fins, and adjacent cooling fins being spaced apart to form an air flow channel.

[0010] Optionally, the heat dissipation air duct has an air flow inlet and an air flow outlet, and the air cooler is opposite to the air flow inlet or at least a part of the air cooler is accommodated in the air flow inlet.

[0011] Optionally, the heat dissipation air duct has an air flow inlet and an air flow outlet, and the air flow inlet is arranged opposite to the air flow outlet.

[0012] Optionally, the air cooler is fixed to the electric control box device.

[0013] Optionally, the electric control box device includes an electric control box body and an electric control board assembly arranged in the electric control box body, the heat dissipation duct is formed in the electric control box body, the heat dissipation duct has an air flow inlet and an air flow outlet, and the air flow inlet and the air flow outlet are formed in the electric control box body.

[0014] Optionally, the electric control board assembly includes an electric control board and components arranged on the electric control board, and at least part of the components are located in the heat dissipation duct.

[0015] Optionally, the electric control heat dissipation component is located in the electric control box body and is thermally connected to the electric control board component.

[0016] Optionally, the electric control board assembly includes an electric control board and components arranged on the electric control board, the components include power devices, the electric control heat dissipation assembly is thermally connected to the power device, and the power device is located in the heat dissipation duct.

[0017] Optionally, the air flow inlet and the air flow outlet are arranged opposite to each other, and at least part of the power devices are located between the air flow inlet and the air flow outlet.

[0018] Optionally, the electrically controlled heat dissipation component further comprises a heat dissipation plate, the first refrigerant pipe is thermally connected to the heat dissipation plate, the heat dissipation plate is thermally connected to the electrically controlled board component, and the heat dissipation plate and the electrically controlled board component (22) are arranged in parallel.

[0019] Optionally, at least part of the air cooler is accommodated in the air flow inlet, the side of the air flow inlet facing the inside of the electrical control box body is an inner edge of the inlet, the air cooler is located on a side of the inner edge of the inlet away from the inside of the electrical control box body, and extends in a direction away from the inner edge of the inlet.

[0020] Optionally, at least part of the air cooler is accommodated in the air flow inlet, and a guide surface is formed on the bottom wall of the air flow inlet, and the guide surface extends obliquely downward in a direction from inside the electric control box body to outside the electric control box body.

[0021] Optionally, the air cooler also includes a plurality of cooling fins, each of which is provided with a through hole, the second refrigerant pipe is passed through the through holes of the plurality of cooling fins, adjacent cooling fins are spaced apart to form an air flow channel, and the cooling fins extend downwardly and obliquely in a direction from inside the electrical control box body to outside the electrical control box body.

[0022] Optionally, it includes an outdoor casing and an outdoor fan, the outdoor fan, the outdoor heat exchanger and the compressor are all arranged in the outdoor casing, and a middle partition is provided in the outdoor casing to divide the space in the outdoor casing into a compressor chamber and a fan chamber, the outdoor heat exchanger and the outdoor fan are located in the fan chamber, the compressor is located in the compressor chamber, an outdoor air inlet and an outdoor air outlet are formed on the outdoor casing, the fan chamber connects the outdoor air inlet and the outdoor air outlet, the air flow inlet of the heat dissipation duct is connected to the compressor chamber, and the air flow outlet of the heat dissipation duct is connected to the fan chamber.

[0023] Optionally, the compressor cavity and the fan cavity are arranged along a first direction, and the air flow inlet and the air flow outlet are arranged opposite to each other along the first direction.

[0024] Optionally, the air flow inlet is located in the fan cavity, and the air flow outlet is located in the compressor cavity.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0027] Figure 1 Schematic diagram of a refrigerant circulation system in some embodiments of the present invention.

[0028] Figure 2 Schematic diagram of an electric control box device and an air cooler in some embodiments of the present invention.

[0029] Figure 3 1 is a diagram of the internal structure of an electric control box device and an air cooler in some embodiments of the present invention.

[0030] Figure 4 1 is an internal structure diagram of an electric control box device and an air cooler in other embodiments of the present invention.

[0031] Figure 5 yes Figure 3 Front view of an embodiment.

[0032] Figure 6 yes Figure 3 Rear view of the embodiment.

[0033] Figure 7 is a front view of an air cooler in some embodiments of the present invention.

[0034] Figure 8 is an isometric view of an air cooler in some embodiments of the present invention.

[0035] Fig. 9 1 and 2 are front and side views of the second refrigerant tube and the cooling fin in some embodiments of the present invention.

[0036] Fig.10 Schematic diagram of an air conditioner outdoor unit in some embodiments of the present invention.

[0037] Reference numerals:

[0038] Refrigerant circulation system 10, compressor 11, outdoor heat exchanger 12, indoor heat exchanger 13, first throttling component 14, second throttling component 15, electronically controlled heat dissipation assembly 16, first refrigerant pipe 161, heat dissipation plate 162, air cooler 17, second refrigerant pipe 171, cooling fin 172, through hole 1721, air flow channel 173, reversing assembly 18, electronic control box device 20, electronic control box body 21, electronic control board assembly 22, electronic control board 221, power device 222, heat dissipation duct 23, air flow outlet 24, outdoor casing 30, outdoor fan 40, middle partition 50, compressor cavity 60, fan cavity 70. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the related art, the heat dissipation of the electric control box device can be done by air cooling and refrigerant cooling, but air cooling is affected by air flow and ambient temperature; while refrigerant cooling is more efficient than air cooling, when the ambient temperature is high, the refrigerant temperature for cooling the electric control box device is usually set to be equivalent to the ambient temperature to avoid condensation inside the electric control box device, which may cause damage to electronic devices and the like due to moisture. Therefore, when the ambient temperature is too high, the heat dissipation effect of the electric control becomes worse. To avoid damage to the electric control, the normal operation of the air conditioner can be ensured by reducing the operating frequency of the compressor, thereby reducing the heating of the electric control. However, this greatly affects the cooling effect of the air conditioner when the ambient temperature is high outdoors, affecting the user's comfort.

[0041] Therefore, the present invention proposes an air-conditioning system that can use low-temperature refrigerant to dissipate heat to the electric control box device 20, and can avoid a large temperature difference between the airflow and the inside of the electric control box device 20 during air cooling, which would cause the inside of the electric control box device 20 to become damp and damaged, thereby improving the cooling effect when the outdoor environment temperature is high and improving the user's comfort.

[0042] like Figures 1 to 10 As shown, according to an air-conditioning system of an embodiment of the present invention, the air-conditioning system includes a refrigerant circulation system 10 and an electric control box device 20. The refrigerant circulation system 10 is used to dissipate heat inside the electric control box device 20. The electric control box device 20 allows air flow to flow in to achieve air-cooled heat dissipation, and the refrigerant circulation system 10 can cool the air flow entering the electric control box device 20. In this way, it is possible to avoid the large temperature difference between the inside of the electric control box device 20 and the air flow to generate condensed water, which can lead to moisture damage.

[0043] Among them, the refrigerant circulation system 10 includes a compressor 11, an outdoor heat exchanger 12, an indoor heat exchanger 13, a first throttling component 14, a second throttling component 15, an air cooler 17 and an electronically controlled heat dissipation component 16; the first throttling component 14 is connected between the outdoor heat exchanger 12 and the second throttling component 15, and the second throttling component 15 is connected between the indoor heat exchanger 13 and the first throttling component 14; in short, the compressor 11, the outdoor heat exchanger 12, the first throttling component 14, the electronically controlled heat dissipation component 16, the second throttling component 15, and the indoor heat exchanger 13 are connected in sequence to form a closed circulation loop, and the refrigerant can circulate in the refrigerant circulation system 10. While meeting the cooling or heating needs of the air-conditioning system, the electronic control box device 20 is cooled to improve the working efficiency of the air-conditioning system.

[0044] Specifically, the electronically controlled heat dissipation component 16 includes a first refrigerant pipe 161, which is connected between the first throttling component 14 and the second throttling component 15. The air cooler 17 includes a second refrigerant pipe 171, which is connected between the second throttling component 15 and the indoor heat exchanger 13. The electronically controlled heat dissipation component 16 is thermally connected to the electronically controlled box device 20 to dissipate heat from the electronically controlled box device 20. The electronically controlled box device 20 is provided with a heat dissipation duct 23 for air to flow through. The air cooler 17 is located on the air inlet side of the heat dissipation duct 23. to cool the air flowing to the heat dissipation duct 23; in this way, the electronic control heat dissipation component 16 can dissipate heat to the electronic control box device 20 with the help of the refrigerant in the refrigerant circulation system 10, so as to reduce the working temperature of the electronic control box device 20 and improve the working performance of the electronic control box device 20; in addition, the electronic control box device 20 can be air-cooled through the heat dissipation duct 23, and the air cooler 17 can cool the airflow on the air inlet side of the heat dissipation duct 23 with the help of the refrigerant in the refrigerant circulation system 10, so as to avoid a large temperature difference between the inside of the electronic control box device 20 and the airflow, which may cause moisture damage.

[0045] like Figure 1 In the direction of the dotted line shown, during cooling, the refrigerant flows from the outdoor heat exchanger 12 to the indoor heat exchanger 13, and flows through the first throttling component 14, the electronically controlled heat dissipation component 16, the second throttling component 15 and the air cooler 17 on the way; wherein, the first throttling component 14 throttles the refrigerant once to reduce the temperature of the refrigerant, and the electronically controlled heat dissipation component 16 dissipates heat to the electronic control box device 20 with the help of the refrigerant after the first throttling, and then the second throttling component 15 throttles the refrigerant for a second time to reduce the temperature of the refrigerant again, and the air cooler 17 cools the air flowing to the heat dissipation duct 23 with the help of the refrigerant after the second throttling; it can be understood that the refrigerant temperature at the air cooler 17 is lower than the refrigerant temperature at the electronically controlled heat dissipation component 16, so that the air cooler 17 can make the air flow temperature lower than the temperature inside the electronic control box device 20, which can avoid the generation of condensed water when the electronic control box device 20 dissipates heat and is damaged by moisture.

[0046] Or, if Figure 1In the direction of the solid line shown, during heating, the refrigerant flows from the indoor heat exchanger 13 to the outdoor heat exchanger 12, and flows through the air cooler 17, the second throttling component 15, the electronically controlled heat dissipation component 16 and the first throttling component 14 on the way; wherein, when the electronic control box device 20 is installed in the outdoor unit of the air conditioner, due to the low temperature of the external environment, the second throttling component 15 may not throttle or slightly throttle the refrigerant, and the electronically controlled heat dissipation component 16 dissipates heat from the electronic control box device 20 with the help of the non-throttling or throttled refrigerant, and then the first throttling component 14 may throttle the refrigerant once to facilitate the refrigerant to absorb heat in the outdoor heat exchanger 12; it can be understood that due to the low temperature of the external environment, the airflow entering the heat dissipation duct 23 is lower than the temperature inside the electronic control box device 20, and when the electronic control box device 20 is air-cooled to dissipate heat, condensation water will not be formed inside the electronic control box device 20, thereby preventing the electronic control box device 20 from being damaged by moisture.

[0047] Of course, according to actual conditions, when the electric control box device 20 is installed in the indoor unit of the air conditioner, the heat of the electric control box device 20 can be dissipated while preventing the electric control box device 20 from being damaged by moisture.

[0048] It should be noted that the first throttling component 14 can be one or more combinations of a one-way throttling valve, a capillary tube, and an electronic expansion valve for one-way throttling of the refrigerant in the refrigerant circulation system 10 when the air-conditioning system is cooling; the second throttling component 15 is the same and will not be repeated here.

[0049] Therefore, according to the air-conditioning system of the embodiment of the present invention, a low-temperature refrigerant can be used to dissipate the heat of the electric control box device 20, and a large temperature difference between the airflow and the inside of the electric control box device 20 during air cooling can be avoided, which would cause the inside of the electric control box device 20 to become damp and damaged, thereby improving the cooling effect when the outdoor environment temperature is high and improving the user's comfort.

[0050] For ease of understanding, unless otherwise specified, the description is given by taking the installation of the electric control box device 20 in the outdoor unit of the air conditioner as an example.

[0051] like Figure 1 As shown, in some embodiments of the present invention, the refrigerant circulation system 10 also includes a reversing component 18, the air-conditioning system has a cooling mode and a heating mode, the reversing component 18 is used to switch the cooling mode and the heating mode, and the second throttling component 15 is a one-way throttle valve. In the cooling mode, the second throttling component 15 throttles in one direction; such a setting can realize the switching of the air-conditioning system between the cooling mode and the heating mode, and meet the heat dissipation requirements of the electronic control box device 20 in different modes, and prevent the electronic control box device 20 from being damaged by moisture.

[0052] Specifically, the reversing component 18 is connected between the indoor heat exchanger 13 and the outdoor heat exchanger 12, and the reversing component 18 is connected to the compressor 11 to form a circulation loop; when the air-conditioning system is switched to the cooling mode, the refrigerant flows forward in the refrigerant circulation system 10, and when it needs to flow through the compressor 11, the reversing component 18 can change the flow direction of the refrigerant, guide the refrigerant to enter from the inlet of the compressor 11, and discharge from the outlet of the compressor 11; when the air-conditioning system is switched to the heating mode, the refrigerant flows reversely in the refrigerant circulation system 10, and when it needs to flow through the compressor 11, the reversing component 18 can change the flow direction of the refrigerant, guide the refrigerant to enter from the inlet of the compressor 11, and discharge from the outlet of the compressor 11; in this way, the air-conditioning system can be switched between the cooling mode and the heating mode.

[0053] In addition, in combination with the above, when the air flow is cooled and dissipated by the heat dissipation duct 23, the temperature of the air flow needs to be lower than the temperature inside the electric control box device 20. In this way, during cooling, the refrigerant can be throttled twice by the first throttling component 14 and the second throttling component 15, so that the temperature of the air flow is lower than the temperature inside the electric control box device 20, thereby preventing the electric control box device 20 from being damaged by moisture; while during heating, due to the low temperature of the external environment, the second throttling component 15 may not throttle or slightly throttle, and the first throttling component 14 throttles. Therefore, in the cooling mode, the second throttling component 15 throttles in one direction; it can be understood that the second throttling component 15 can be a one-way throttle valve, which throttles the refrigerant in the cooling mode and allows the refrigerant to flow smoothly in the heating mode.

[0054] It should be explained that the one-way throttle valve includes a one-way valve and a throttle valve in parallel. When the fluid flows in from the inlet end, the valve core moves under the pressure, opening the channel to allow the fluid to flow through. At this time, the one-way throttle valve acts as a one-way valve, allowing the fluid to flow in one direction only. When the fluid flows in from the other direction (i.e. the outlet end), the valve core will block part of the channel and play a throttling role. By adjusting the gap between the valve core and the valve seat, the flow rate of the fluid can be controlled.

[0055] like Figures 2 to 5 , Figures 7 to 9 As shown, in some embodiments of the present invention, at least part of the second refrigerant pipe 171 is bent and extended. In this way, the space occupied by the second refrigerant pipe 171 can be reduced by bending and extending the second refrigerant pipe 171, the space utilization rate of the air conditioning system can be improved, and the part of the second refrigerant pipe 171 on the air inlet side of the heat dissipation duct 23 can be increased, thereby improving the cooling efficiency of the air cooler 17 on the air flow and preventing the interior of the electric control box device 20 from being damaged by moisture. In addition, the bent and extended second refrigerant pipe 171 can help the pipeline to be arranged on the same side of the electric control box device 20, thereby improving the space utilization rate of the air conditioning system.

[0056] like Figures 2 to 5 , Figures 7 to 9As shown, in some embodiments of the present invention, the air cooler 17 also includes a plurality of cooling fins 172, each of which is provided with a through hole 1721, and the second refrigerant pipe 171 is passed through the through holes 1721 of the plurality of cooling fins 172, and adjacent cooling fins 172 are spaced apart to form an air flow channel 173; in this way, the cooling efficiency of the air cooler 17 on the air flow can be improved, and the internal part of the electric control box device 20 can be prevented from being damaged by moisture.

[0057] In detail, multiple cooling fins 172 are thermally connected to the second refrigerant tube 171, and two adjacent cooling fins 172 are spaced apart to form an airflow channel 173. In this way, the heat conduction area between the second refrigerant tube 171 and the airflow can be increased by the multiple cooling fins 172, so that the airflow entering the heat dissipation duct 23 can be cooled more quickly, thereby preventing the interior of the electric control box device 20 from being damaged by moisture.

[0058] Furthermore, the cooling fin 172 is provided with a penetration hole 1721 , and the second refrigerant pipe 171 can be penetrated in the penetration hole 1721 , so that the second refrigerant pipe 171 can be fixed on the air inlet side of the heat dissipation duct 23 , so that the second refrigerant pipe 171 can cool the airflow.

[0059] like Figures 2 to 4 As shown, in some embodiments of the present invention, the heat dissipation duct 23 has an air flow inlet (not shown) and an air flow outlet 24. The air flow enters the heat dissipation duct 23 from the air flow inlet and is discharged from the air flow outlet 24 to dissipate the internal air cooling of the electric control box device 20. The air cooler 17 is opposite to the air flow inlet, so that the air cooler 17 can cool the air flow passing through the air flow inlet with the help of refrigerant, and the air cooler 17 plays a role in intercepting the air flow to increase the residence time of the air flow at the air flow inlet, thereby improving the cooling efficiency of the air cooler 17 on the air flow; or, at least a portion of the air cooler 17 is accommodated in the air flow inlet, so that the air flow passing through the air flow inlet can fully contact with the air cooler 17, and the air cooler 17 can cool the air flow, thereby improving the cooling effect and preventing the internal part of the electric control box device 20 from being damaged by moisture.

[0060] like Figures 2 to 4 As shown, in some embodiments of the present invention, the heat dissipation duct 23 has an air flow inlet and an air flow outlet 24, and the air flow inlet and the air flow outlet 24 are arranged relative to each other, so that the air flow can form convection between the air flow inlet and the air flow outlet 24, so that the air flow can quickly take away the heat inside the electric control box device 20, thereby achieving the purpose of air cooling and heat dissipation.

[0061] like Figures 2 to 5As shown, in some embodiments of the present invention, the air cooler 17 is fixed to the electric control box device 20, so that the integration of the air conditioning system can be improved, the volume of the air conditioning system can be reduced, and the space utilization rate can be improved. In some specific examples, a plurality of cooling fins 172 are connected to the air flow inlet edge of the heat dissipation duct 23, and the second refrigerant pipe 171 is penetrated in the penetration holes 1721 of the plurality of cooling fins 172, so that the air cooler 17 is fixed to the electric control box device 20 to improve the integration of the air conditioning system.

[0062] like Figures 3 to 6 As shown, in some embodiments of the present invention, the electric control box device 20 includes an electric control box body 21 and an electric control board assembly 22 arranged in the electric control box body 21, and a heat dissipation duct 23 is formed in the electric control box body 21, and the heat dissipation duct 23 has an air flow inlet and an air flow outlet 24, and the air flow inlet and the air flow outlet 24 are formed in the electric control box body 21; it can be understood that when the electric control box device 20 is working, the electric control board assembly 22 serves as the heat source of the electric control box device 20, and can be air-cooled through the heat dissipation duct 23 of the electric control box body 21, and the electric control box device 20 is cooled by refrigerant in combination with the refrigerant, which can improve the heat dissipation efficiency of the electric control board assembly 22.

[0063] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the electric control board assembly 22 includes an electric control board 221 and components arranged on the electric control board 221, and at least some of the components are located in the heat dissipation duct 23; it can be understood that when the electric control box device 20 is working, the components on the electric control board 221 are heat sources. In order to maintain the components within a predetermined temperature range, at least some of the components can be located in the heat dissipation duct 23, and the components are cooled by air through the airflow flowing through the heat dissipation duct 23, and the electric control box device 20 is cooled by refrigerant in combination with the refrigerant, which can improve the heat dissipation efficiency of the components.

[0064] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the electric control heat dissipation component 16 is located in the electric control box body 21 and is thermally connected to the electric control board assembly 22; specifically, in combination with the foregoing, the electric control heat dissipation component 16 may include a first refrigerant pipe 161, and the first refrigerant pipe 161 may be thermally connected to the electric control board assembly 22, for performing refrigerant heat dissipation on the electric control board assembly 22, and air-cooling the electric control board assembly 22 through the heat dissipation duct 23, and cooling the air flow entering the heat dissipation duct 23 through the air cooler 17, so as to avoid moisture damage to the electric control board assembly 22 while dissipating the heat of the electric control board assembly 22.

[0065] Further, the electric control board assembly 22 includes an electric control board 221 and components arranged on the electric control board 221, the components include a power device 222, the electric control heat dissipation assembly 16 is thermally connected to the power device 222, and the power device 222 is located in the heat dissipation duct 23; specifically, the first refrigerant pipe 161 of the electric control heat dissipation assembly 16 is thermally connected to the power device 222, and is used to perform refrigerant heat dissipation on the power device 222, and air-cooling and heat dissipation of the power device 222 through the heat dissipation duct 23, and the air cooler 17 is used to cool the airflow entering the heat dissipation duct 23, so as to prevent the airflow from forming condensed water on the power device 222 and causing moisture damage while dissipating the power. Among them, the power device 222 can be a PM (power module), an IGBT (insulated gate bipolar transistor), an FRD (fast recovery diode), a rectifier bridge, etc.

[0066] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the air flow inlet and the air flow outlet 24 are arranged relative to each other, so that convection can be formed between the air flow inlet and the air flow outlet 24, and at least part of the power device 222 is located between the air flow inlet and the air flow outlet 24, and the heat of the power device 222 is quickly taken away by the convection between the air flow inlet and the air flow outlet 24, thereby achieving the effect of rapid heat dissipation.

[0067] like Figure 3 and Figure 4 As shown, in some embodiments of the present invention, the electric control heat dissipation component 16 also includes a heat sink 162, the first refrigerant tube 161 is thermally connected to the heat sink 162, and the heat sink 162 is thermally connected to the electric control board component 22. In this way, the heat dissipation area between the first refrigerant tube 161 and the electric control board component 22 can be increased through the heat dissipation class, thereby increasing the refrigerant heat dissipation effect of the first refrigerant tube 161 on the electric control board component 22. In combination with the above, the electric control board component 22 includes an electric control board 221 and a power device 222. In practice, the power device 222 is used as a heat source of the electric control board component 22. The power device 222 can be thermally connected to the heat sink 162, thereby increasing the heat dissipation area between the first refrigerant tube 161 and the power device 222, and improving the heat dissipation effect.

[0068] In addition, the heat sink 162 is arranged in parallel with the electric control board assembly 22; it can be understood that, in practice, the electric control box body 21 is in the shape of a rectangular parallelepiped and is placed horizontally in the outdoor housing 30, and the electric control board assembly 22 is generally placed horizontally in the electric control box body 21. Therefore, the heat sink 162 can be placed flat in the electric control box body 21 and connected to the electric control board assembly 22 to improve the space utilization of the electric control box body 21, and enable the electric control board assembly 22 to bear the force of the heat sink 162 more evenly to avoid damage to the electric control board assembly 22; and the heat sink 162 can guide the airflow to flow evenly through the electric control board assembly 22 to better dissipate heat for the electric control board assembly 22.

[0069] like Figures 3 to 5 As shown, in some embodiments of the present invention, at least a portion of the air cooler 17 is accommodated in the air flow inlet, and the side of the air flow inlet facing the inside of the electric control box body 21 is the inner edge of the inlet, and the air cooler 17 is located on the side of the inner edge of the inlet away from the inside of the electric control box body 21, and extends in a direction away from the inner edge of the inlet; it can be understood that the air cooler 17 can be set at the air flow inlet, but is not located in the electric control box body 21, and the air cooler 17 extends in a direction away from the inner edge of the inlet, so that when the external ambient temperature is higher than the temperature of the air cooler 17, the condensed water formed at the air cooler 17 can be away from the interior of the electric control box body 21, so as to prevent the condensed water from entering the electric control box body 21 and causing the electric control box device 20 to be damaged by moisture.

[0070] In other embodiments of the present invention, at least a portion of the air cooler 17 is accommodated in the air flow inlet, and a guide surface is formed on the bottom wall of the air flow inlet, which extends obliquely downward in a direction from the inside of the electric control box body 21 to the outside of the electric control box body 21; it can be understood that when the external ambient temperature is higher than the temperature of the air cooler 17, the condensed water formed at the air cooler 17 can be guided to the outside of the electric control box body 21 under the guiding effect of the guide surface of the air flow inlet and the action of gravity, thereby preventing the condensed water from entering the interior of the electric control box body 21 and causing the electric control box device 20 to be damaged by moisture.

[0071] In some further embodiments of the present invention, the air cooler 17 also includes a plurality of cooling fins 172, each of which is provided with a through hole 1721, and the second refrigerant tube 171 is passed through the through holes 1721 of the plurality of cooling fins 172, and adjacent cooling fins 172 are spaced apart to form an air flow channel 173, and the cooling fins 172 extend downwardly and obliquely in a direction from the inside of the electrical control box body 21 to the outside of the electrical control box body 21; in this way, the condensed water formed at the air cooler 17 can be directed to the outside of the electrical control box device 20 to prevent the electrical control box device 20 from being damaged by moisture.

[0072] Specifically, an air flow channel 173 is formed between two adjacent ones of the multiple cooling fins 172, and the cooling fins 172 extend downwardly and obliquely in the direction from the inside of the electric control box body 21 to the outside of the electric control box body 21, so that the air flow channel 173 also extends downwardly and obliquely in the direction from the inside of the electric control box body 21 to the outside of the electric control box body 21. In this way, when the external ambient temperature is higher than the temperature of the air cooler 17, the condensed water formed at the air cooler 17 can drip in a direction away from the air flow inlet under the action of gravity, thereby preventing the condensed water from entering the interior of the electric control box device 20 and causing the electric control box device 20 to be damaged by moisture.

[0073] Furthermore, the cooling fin 172 includes a plurality of first fins and a plurality of second fins, the plurality of first fins are arranged in a horizontal direction and spaced apart, the upper ends of the plurality of first fins are connected to the second fins, and the lower ends of the plurality of second fins are connected to the second fins to form a plurality of air flow channels 173, and the second fins extend downwardly and obliquely in a direction from inside the electric control box body 21 to outside the electric control box body 21, so that the second fins can guide condensed water to the outside of the electric control box device 20 to prevent condensed water from entering the inside of the electric control box device 20 and causing the electric control box device 20 to be damaged by moisture.

[0074] like Fig.10 As shown, in some embodiments of the present invention, an outdoor casing 30 and an outdoor fan 40 are included. The outdoor fan 40, the outdoor heat exchanger 12 and the compressor 11 are all arranged in the outdoor casing 30. A middle partition 50 is provided in the outdoor casing 30 to divide the space in the outdoor casing 30 into a compressor chamber 60 and a fan chamber 70. The outdoor heat exchanger 12 and the outdoor fan 40 are located in the fan chamber 70, and the compressor 11 is located in the compressor chamber 60. In this way, the outdoor fan 40 can be separated from the compressor 11 by the middle partition 50 to prevent the fan from throwing water droplets to the compressor 11 on rainy days, thereby affecting the normal operation of the compressor 11.

[0075] An outdoor air inlet and an outdoor air outlet are formed on the outdoor casing 30, the fan cavity 70 is connected to the outdoor air inlet and the outdoor air outlet, the air flow inlet of the heat dissipation duct 23 is connected to the compressor cavity 60, and the air flow outlet 24 of the heat dissipation duct 23 is connected to the fan cavity 70; it can be understood that when the outdoor fan 40 is working, it can drive the air flow from the outdoor air inlet into the fan cavity 70 and be discharged from the outdoor air outlet. During this process, the outdoor fan 40 can create a negative pressure in the heat dissipation duct 23, so that the air flow flows from the air flow inlet through the heat dissipation duct 23 and is discharged from the air flow outlet 24. In other words, the electrical control box device 20 can use the outdoor fan 40 to achieve air cooling and heat dissipation, so as to improve the heat dissipation effect of the power device 222, without the need for additional air flow driving parts, and the cost is low.

[0076] like Fig.10 As shown, in some embodiments of the present invention, the compressor cavity 60 and the fan cavity 70 are arranged along the first direction, and the airflow inlet and the airflow outlet 24 are arranged relatively along the first direction; it can be understood that the arrangement direction of the compressor cavity 60 and the fan cavity 70 is consistent with the relative direction of the airflow inlet and the airflow outlet 24 of the heat dissipation duct 23, so that when the electric control box device 20 is air-cooled and dissipated, the resistance of the airflow can be reduced, so that the airflow can flow smoothly along the compressor cavity 60, the airflow inlet, the heat dissipation duct 23, the airflow outlet 24 and the fan cavity 70, thereby improving the heat dissipation efficiency of the electric control box device 20. Among them, the first direction can be Figure 4 Indicates the left and right direction.

[0077] like Fig.10As shown, in some embodiments of the present invention, the air flow inlet is located in the fan cavity 70, and the air flow outlet 24 is located in the compressor cavity 60; in this way, the integration of the air conditioning system can be improved and the space utilization rate can be improved.

[0078] Furthermore, in some specific examples, the electrical control box device 20 is connected to the inner top wall of the outdoor casing 30, the upper end of the middle partition 50 is connected to the inner top wall of the outdoor casing 30 and the outer surface of the electrical control box device 20, and the lower end of the middle partition 50 is connected to the inner bottom wall of the outdoor casing 30, thereby dividing the interior of the outdoor casing 30 into a fan cavity 70 and a compressor cavity 60 arranged in the left and right directions, and the air flow inlet and air flow outlet 24 of the heat dissipation duct 23 are also opposite to each other in the left and right directions; when the air-conditioning system is running, the air flow can flow from the compressor cavity 60 through the interior of the electrical control box device 20 to the fan cavity 70, so as to achieve air-cooling and heat dissipation of the electrical control box device 20.

[0079] In the related art, there is a method of using refrigerant heat dissipation to fix the main heat-generating components of the electronic control, such as PM, IGBT, FRD, rectifier bridge, etc., on a metal substrate. The substrate is close to the refrigerant tube, and the heat is transferred from the device to the refrigerant tube through the heat dissipation substrate, and the heat is quickly taken away by the flowing refrigerant. Compared with air cooling, refrigerant heat dissipation is more efficient. In order to prevent condensation, the refrigerant flowing through the electronic control is usually controlled at a temperature equivalent to the environment. The electronic control heat dissipation component 16 is connected in series between the indoor heat exchanger 13 and the outdoor heat exchanger 12, and the temperature of the refrigerant flowing therethrough is controlled to be equivalent to the ambient temperature through the front and rear throttling components. Therefore, when the ambient temperature is too high, the refrigerant temperature is too high, the heat taken away is limited, and the heat dissipation of the electronic control becomes poor. The only way to reduce the heating of the electronic control is to limit the frequency, which affects the normal operation of the air conditioner.

[0080] Therefore, an embodiment of the present invention proposes an air-conditioning system, in which the electronically controlled power device 222 uses a low-temperature refrigerant after primary throttling to dissipate heat. To avoid the occurrence of condensed water, a refrigerant with an even lower temperature after secondary throttling is used to cool the air and then fill the air around the refrigerant heat dissipation device, so that the surrounding air temperature is lower than the temperature of the device. When the low-temperature refrigerant is used for heat dissipation, the occurrence of condensed water can be avoided, thereby improving the heat dissipation effect of the electronic control.

[0081] Specifically, the air conditioning system includes: a compressor 11, a fan, a heat exchanger, a first throttling component 14, a second throttling component 15, and a refrigerant pipe and an electric control connecting the components. The compressor 11 is used to compress the refrigerant; the heat exchanger is used to exchange heat between the refrigerant flowing therein and the outside; the refrigerant pipe connects the compressor 11 and the heat exchanger and carries the refrigerant therein; the electric control is the electrical control component of the air conditioning outdoor unit. The system refrigerant loop includes: a compressor 11, a reversing component 18, an outdoor heat exchanger 12, an indoor heat exchanger 13, a first throttling component 14, an electric control heat dissipation component 16, a second throttling component 15, and an air cooler 17. The electric control heat dissipation component 16 and an air connector are connected in series between the outdoor heat exchanger 12 and the indoor heat exchanger 13; the first end of the first throttling component 14 is connected to the second end of the outdoor heat exchanger 12, the second end of the first throttling component 14 is connected to the first end of the electric control heat dissipation component 16, the second end of the electric control heat dissipation component 16 is connected to the first end of the second throttling component 15, the second end of the second throttling component 15 is connected to the first end of the air cooler 17, and the second end of the air cooler 17 is connected to one end of the indoor heat exchanger 13. The second end of the indoor heat exchanger 13 is connected to the first end of the outdoor heat exchanger 12 through the compressor 11 and the reversing device.

[0082] How the air conditioning system works:

[0083] When the air conditioner switches between cooling and heating, the refrigerant flow path is reversed through the reversing component 18. When heating, the refrigerant flows from the indoor heat exchanger 13 to the air cooler 17 in the direction of the solid arrow, flows into the electronically controlled heat dissipation component 16 after passing through the second throttling component 15, and then flows into the outdoor heat exchanger 12 through the first throttling component 14. When heating, the second throttling component 15 does not throttle or throttles slightly (the temperature difference of the refrigerant before and after the second throttling component 15 is within 5°C); when cooling, the refrigerant flows from the outdoor heat exchanger 12 to the electronically controlled heat dissipation component 16 through the first throttling component 14 in the direction of the dotted arrow, and then flows into the air cooler 17 after passing through the second throttling component 15, and then flows into the indoor heat exchanger 13 after passing through the air cooler 17. When cooling, the second throttling component 15 throttles (the temperature difference of the refrigerant before and after the second throttling component 15 is above 3°C).

[0084] The throttling component can be a combination of one or more of a one-way throttling valve, a capillary tube, and an electronic expansion valve. During cooling, the first throttling component 14 and the second throttling element throttle; during heating, the first throttling component 14 throttles, and the second throttling component 15 does not throttle or throttles slightly. The air cooler 17 is located at the entrance of the heat dissipation duct 23, and cools the air entering the duct, and reduces its temperature to below the ambient temperature under cooling conditions. The power device 222 uses refrigerant to dissipate heat, and the power components IGBT, IPM, rectifier bridge, etc. are in contact with the electronically controlled heat dissipation component 16, and transfer heat to the refrigerant pipe; the refrigerant flows in the refrigerant pipe to transport heat. The device that uses refrigerant to dissipate heat is located in the duct from the entrance to the outlet of the duct.

[0085] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0086] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0087] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0088] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0089] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An air conditioning system, characterized in that: include: A refrigerant circulation system and an electronically controlled box device, wherein the refrigerant circulation system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, a first throttling component, a second throttling component, an air cooler and an electronically controlled heat dissipation component, wherein the first throttling component is connected between the outdoor heat exchanger and the second throttling component, and the second throttling component is connected between the indoor heat exchanger and the first throttling component. The electronically controlled heat dissipation component comprises a first refrigerant pipe, which is connected between the first throttling component and the second throttling component. The air cooler comprises a second refrigerant pipe, which is connected between the second throttling component and the indoor heat exchanger. The electronically controlled heat dissipation component is thermally connected to the electronically controlled box device for dissipating heat from the electronically controlled box device. The electronically controlled box device is provided with a heat dissipation duct for air to flow through. The air cooler is located on the air inlet side of the heat dissipation duct for cooling the air flowing to the heat dissipation duct.

2. The air conditioning system according to claim 1, characterized in that: The refrigerant circulation system also includes a reversing component. The air-conditioning system has a cooling mode and a heating mode. The reversing component is used to switch between the cooling mode and the heating mode. The second throttling component is a one-way throttle valve. In the cooling mode, the second throttling component performs one-way throttling.

3. The air conditioning system according to claim 1, characterized in that: At least a portion of the second refrigerant pipe is bent and extended; And / or, the air cooler further comprises a plurality of cooling fins, each of the cooling fins being provided with a through hole, the second refrigerant pipe being passed through the through holes of the plurality of cooling fins, and adjacent cooling fins being spaced apart to form an air flow channel.

4. The air conditioning system according to claim 1, characterized in that: The heat dissipation air duct has an air flow inlet and an air flow outlet, the air cooler is opposite to the air flow inlet or at least part of the air cooler is accommodated in the air flow inlet; And / or, the heat dissipation air duct has an air flow inlet and an air flow outlet, and the air flow inlet is arranged opposite to the air flow outlet.

5. The air conditioning system according to claim 1, characterized in that: The air cooler is fixed to the electric control box device.

6. The air conditioning system according to claim 1, characterized in that: The electric control box device includes an electric control box body and an electric control board assembly arranged in the electric control box body. The heat dissipation duct is formed in the electric control box body. The heat dissipation duct has an air flow inlet and an air flow outlet. The air flow inlet and the air flow outlet are formed in the electric control box body.

7. The air conditioning system according to claim 6, characterized in that: The electric control board assembly includes an electric control board and components arranged on the electric control board, and at least part of the components are located in the heat dissipation duct.

8. The air conditioning system according to claim 6, characterized in that: The electric control heat dissipation component is located in the electric control box body and is thermally connected to the electric control board component.

9. The air conditioning system according to claim 8, characterized in that: The electric control board assembly includes an electric control board and components arranged on the electric control board, the components include power devices, the electric control heat dissipation assembly is thermally connected to the power devices, and the power devices are located in the heat dissipation duct.

10. The air conditioning system according to claim 9, characterized in that: The air flow inlet and the air flow outlet are arranged opposite to each other, and at least part of the power devices are located between the air flow inlet and the air flow outlet.

11. The air conditioning system according to claim 8, characterized in that: The electronically controlled heat dissipation component further comprises a heat dissipation plate, the first refrigerant pipe is thermally connected to the heat dissipation plate, the heat dissipation plate is thermally connected to the electronic control board component, and the heat dissipation plate and the electronic control board component are arranged in parallel.

12. The air conditioning system according to claim 6, characterized in that: At least part of the air cooler is accommodated in the air flow inlet, a side of the air flow inlet facing the inside of the electric control box is an inner edge of the inlet, the air cooler is located on a side of the inner edge of the inlet away from the inside of the electric control box, and extends in a direction away from the inner edge of the inlet; And / or, at least part of the air cooler is accommodated in the air flow inlet, and a guide surface is formed on the bottom wall of the air flow inlet, and the guide surface extends obliquely downward in a direction from inside the electric control box body to outside the electric control box body; And / or, the air cooler also includes a plurality of cooling fins, each of which is provided with a through hole, the second refrigerant pipe is passed through the through holes of the plurality of cooling fins, adjacent cooling fins are spaced apart to form an air flow channel, and the cooling fins extend downwardly and obliquely in a direction from inside the electrical control box body to outside the electrical control box body.

13. The air conditioning system according to any one of claims 1 to 12, characterized in that: It includes an outdoor casing and an outdoor fan, the outdoor fan, the outdoor heat exchanger and the compressor are all arranged in the outdoor casing, and a middle partition is provided in the outdoor casing to divide the space in the outdoor casing into a compressor chamber and a fan chamber, the outdoor heat exchanger and the outdoor fan are located in the fan chamber, the compressor is located in the compressor chamber, an outdoor air inlet and an outdoor air outlet are formed on the outdoor casing, the fan chamber is connected with the outdoor air inlet and the outdoor air outlet, the air flow inlet of the heat dissipation duct is connected with the compressor chamber, and the air flow outlet of the heat dissipation duct is connected with the fan chamber.

14. The air conditioning system according to claim 13, characterized in that: The compressor cavity and the fan cavity are arranged along a first direction, and the air flow inlet and the air flow outlet are arranged opposite to each other along the first direction; And / or, the air flow inlet is located in the fan cavity, and the air flow outlet is located in the compressor cavity.

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