Air conditioner outdoor unit

Abstract

The utility model discloses an air conditioner outdoor unit, an air conditioner applying the air conditioner outdoor unit comprises a refrigerant circulation system, the refrigerant circulation system comprises a compressor, a condenser, an evaporator and a throttling device, and the evaporator is arranged on a second refrigerant flow path between the throttling device and an air return port of the compressor. The part, located in the air conditioner outdoor unit, of the second refrigerant flow path is an outdoor unit low-temperature part. The air conditioner outdoor unit comprises an electric control box and an air duct structural part, the electric control box comprises a box body and a circuit board, the circuit board is arranged in the box body, the electric control box comprises a heat dissipation air duct located outside the box body and used for heat dissipation, the air duct structural part defines a refrigeration air duct, and the refrigeration air duct is matched with a low-temperature part of the outdoor unit in a heat exchange mode and communicated with the heat dissipation air duct. The low-temperature air flow flowing through the refrigeration air duct is guided to the electric control box to dissipate heat of the electric control box, the heat dissipation effect of the electric control box is improved under the condition that the specification of devices is not needed to be improved and the size of a heat dissipation piece is not needed to be increased, the manufacturing cost is reduced, and the working reliability of the air conditioner outdoor unit is improved.

Description

Technical Field

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

[0002] The power devices of the air conditioner's electronic control generate heat during operation. Moreover, the greater the power of the electronic control, the more heat is generated. If this heat cannot be dissipated in time, it will cause the temperature of the power devices to rise. The greater the heat, the higher the temperature. When the temperature exceeds the critical operating temperature of the devices, it will cause damage to the devices. Therefore, in the air conditioning system, it is very important to design good heat dissipation for the electronic control, which is related to whether the air conditioner can operate reliably, continuously, and at full load.

[0003] In the related art, the air-cooled heat dissipation method is used to dissipate heat from the electronic control. The heat dissipation effect depends on the flow of the air current in the surrounding environment and is easily affected by external factors. When the outdoor air current temperature is relatively high, the heat dissipation effect is poor. Often, additional measures such as using large heat sinks or increasing the device specifications are required to enhance and accelerate heat dissipation, resulting in an increase in volume and manufacturing cost. Content of the Utility Model

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. For this reason, the utility model provides an outdoor unit of an air conditioner, which can improve the heat dissipation effect of the electronic control box without increasing the device specifications and the volume of the heat dissipation components, thereby reducing the manufacturing cost and improving the working reliability of the outdoor unit of the air conditioner.

[0005] According to an embodiment of the utility model, the air conditioner of the outdoor unit of the air conditioner includes a refrigerant circulation system. The refrigerant circulation system includes a compressor, a condenser, an evaporator, and a throttling device. The condenser is provided on a first refrigerant flow path from the exhaust port of the compressor to the throttling device. The evaporator is provided on a second refrigerant flow path between the throttling device and the suction port of the compressor. The part of the second refrigerant flow path located inside the outdoor unit of the air conditioner is the low-temperature part of the outdoor unit. The outdoor unit of the air conditioner includes: an electronic control box, which includes a box body and a circuit board. The circuit board is provided inside the box body. The electronic control box includes a heat dissipation air duct located outside the box body and used for heat dissipation; an air duct structure member that defines a refrigeration air duct. The refrigeration air duct is in heat exchange cooperation with the low-temperature part of the outdoor unit and is communicated with the heat dissipation air duct.

[0006] An outdoor unit of an air conditioner according to an embodiment of the present utility model forms a refrigeration air duct that exchanges heat with a low-temperature part of the outdoor unit through a duct structure member. The refrigeration air duct communicates with a heat dissipation air duct, and guides the low-temperature air flow flowing through the refrigeration air duct to an electronic control box to dissipate heat from the electronic control box. Without the need for components to improve specifications and increase the volume of heat dissipation components, the heat dissipation effect of the electronic control box is improved, the working temperature of the circuit board of the electronic control box is effectively reduced, the manufacturing cost is reduced, and the working reliability of the outdoor unit of the air conditioner is improved.

[0007] In some embodiments, at least a part of the low-temperature part of the outdoor unit is arranged in the refrigeration air duct to cooperate with the refrigeration air duct for heat exchange.

[0008] In some embodiments, the low-temperature part of the outdoor unit includes a refrigerant pipe, and at least a part of the refrigerant pipe extends into the refrigeration air duct.

[0009] In some embodiments, the outdoor unit of the air conditioner further includes a radiator, the radiator is located in the refrigeration air duct, and is in contact heat transfer with the refrigerant pipe.

[0010] In some embodiments, the radiator includes a plurality of heat dissipation fins arranged at intervals, and the refrigerant pipe passes through the plurality of heat dissipation fins.

[0011] In some embodiments, the radiator is arranged closer to the inlet of the refrigeration air duct relative to the outlet of the refrigeration air duct, and the flow-through gap formed between adjacent heat dissipation fins faces the inlet of the refrigeration air duct and is open.

[0012] In some embodiments, the part of the low-temperature part of the outdoor unit arranged in the refrigeration air duct is arranged closer to the inlet of the refrigeration air duct relative to the outlet of the refrigeration air duct.

[0013] In some embodiments, the inlet area of the refrigeration air duct is larger than the outlet area of the refrigeration air duct.

[0014] In some embodiments, the outdoor unit of the air conditioner includes a housing and a middle partition plate arranged in the housing. The space in the housing includes a blower cavity and a compressor cavity separated on both sides of the middle partition plate. A blower is arranged in the blower cavity, the compressor is arranged in the compressor cavity, the housing is provided with a ventilation opening corresponding to the compressor cavity, the duct structure member is located in the compressor cavity, the refrigeration air duct communicates with the ventilation opening, the air duct inlet of the heat dissipation air duct is located in the compressor cavity and communicates with the refrigeration air duct, and the air duct outlet of the heat dissipation air duct is located in the blower cavity and communicates with the air inlet side of the blower.

[0015] In some embodiments, the air duct structural member is formed in the form of a wind cylinder with both ends open. One end of the air duct structural member extends towards the ventilation opening so that the refrigeration air duct communicates with the ventilation opening, and the other end of the air duct structural member extends to the air duct inlet of the heat dissipation air duct to communicate with the heat dissipation air duct.

[0016] In some embodiments, the air duct structural member is formed in a gradually expanding cylindrical shape with a gradually increasing cross-section from the heat dissipation air duct to the ventilation opening.

[0017] In some embodiments, the electronic control box is arranged above the middle partition board, the air duct structural member is arranged above the compressor, and the ventilation opening is located on one side of the compressor cavity away from the fan cavity.

[0018] In some embodiments, the air conditioner includes an outdoor heat exchanger and an indoor heat exchanger, and the refrigerant circulation system includes a four-way valve. The four-way valve is used to switch one of the outdoor heat exchanger and the indoor heat exchanger to be used as the condenser while the other is used as the evaporator; the low-temperature part of the outdoor unit includes a refrigerant pipe; wherein, the refrigerant pipe includes a first refrigerant pipe connected between the four-way valve and the suction port of the compressor, and at least part of the first refrigerant pipe extends into the refrigeration air duct to cooperate with the refrigeration air duct for heat exchange; alternatively, the refrigerant pipe includes a second refrigerant pipe connected between the throttling device and the indoor heat exchanger, and at least part of the second refrigerant pipe extends into the refrigeration air duct to cooperate with the refrigeration air duct for heat exchange.

[0019] In some embodiments, the air conditioner includes an outdoor heat exchanger and an indoor heat exchanger, the air conditioner is a single-cooling air conditioner, the outdoor heat exchanger is used as the condenser, and the indoor heat exchanger is used as the evaporator; the low-temperature part of the outdoor unit includes a refrigerant pipe; wherein, the refrigerant pipe includes a third refrigerant pipe connected between the throttling device and the indoor heat exchanger, and at least part of the third refrigerant pipe extends into the refrigeration air duct to cooperate with the refrigeration air duct for heat exchange; alternatively, the refrigerant pipe includes a fourth refrigerant pipe connected between the indoor heat exchanger and the suction port of the compressor, and at least part of the fourth refrigerant pipe extends into the refrigeration air duct to cooperate with the refrigeration air duct for heat exchange.

[0020] In some embodiments, the box body is a sealed box; and / or, the electronic control box includes an outer cover, and a heat dissipation air duct is formed between the outer cover and the box body.

[0021] Additional aspects and advantages of the present utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0022] Figure 1Schematic diagram of a refrigerant circulation system according to an embodiment of the present utility model;

[0023] Figure 2 Partial structural schematic diagram of an outdoor unit of an air conditioner according to an embodiment of the present utility model;

[0024] Figure 3 Cross-sectional view of an outdoor unit of an air conditioner according to an embodiment of the present utility model;

[0025] Figure 4 Is according to Figure 2 Partial enlarged view of area A shown in the example;

[0026] Figure 5 Partial structural schematic diagram of an outdoor unit of an air conditioner from another angle according to an embodiment of the present utility model;

[0027] Figure 6 Schematic diagram of a refrigerant circulation system according to another embodiment of the present utility model;

[0028] Figure 7 Schematic diagram of a refrigerant circulation system according to still another embodiment of the present utility model;

[0029] Figure 8 Schematic diagram of a refrigerant circulation system according to yet another embodiment of the present utility model.

[0030] Reference numerals:

[0031] Refrigerant circulation system 200; Compressor 201; Condenser 202; Evaporator 203; Throttling device 204; Four-way valve 205; First refrigerant flow path 206; Second refrigerant flow path 207;

[0032] Outdoor unit 100 of an air conditioner;

[0033] Electric control box 1; Box body 11; Circuit board 12; Heat dissipation air duct 13; Air duct inlet 13a of the heat dissipation air duct; Air duct outlet 13b of the heat dissipation air duct; Outer cover 14; Electric control radiator 15;

[0034] Air duct structure member 2; Refrigeration air duct 21; Inlet 21a of the refrigeration air duct; Outlet 21b of the refrigeration air duct;

[0035] Low-temperature part 3 of the outdoor unit; Refrigerant pipe 3a; First refrigerant pipe 31; Second refrigerant pipe 32; Third refrigerant pipe 33; Fourth refrigerant pipe 34;

[0036] Radiator 4; Heat dissipation fins 41; Flow-through gap 42;

[0037] Housing 5; Fan cavity 5a; Compressor cavity 5b; Ventilation opening 51;

[0038] Middle partition 6;

[0039] Outdoor heat exchanger 7;

[0040] Indoor heat exchanger 8. Detailed implementation manners

[0041] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0042] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or letters in different examples. Such repetition is for the purpose of simplification and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art may be aware of the applicability of other processes and / or the use of other materials.

[0043] An air conditioner outdoor unit 100 according to an embodiment of the present utility model will be described below with reference to the drawings.

[0044] The air conditioner outdoor unit 100 according to an embodiment of the present utility model, as Figure 1 shown, the air conditioner to which the air conditioner outdoor unit 100 is applied includes a refrigerant circulation system 200. The refrigerant circulation system 200 includes a compressor 201, a condenser 202, an evaporator 203, and a throttling device 204. The condenser 202 is provided on a first refrigerant flow path 206 from the exhaust port of the compressor 201 to the throttling device 204. The evaporator 203 is provided on a second refrigerant flow path 207 between the return air port of the throttling device 204 and the compressor 201. The portion of the second refrigerant flow path 207 located inside the air conditioner outdoor unit 100 is an outdoor unit low temperature part 3.

[0045] The compressor 201 compresses the refrigerant into a high-temperature and high-pressure gaseous refrigerant. After the high-temperature and high-pressure gaseous refrigerant is discharged from the exhaust port of the compressor 201, it flows along the first refrigerant flow path 206 to the condenser 202. The refrigerant liquefies and releases heat in the condenser 202, heating the flowing air stream. Subsequently, the liquefied low-temperature and high-pressure liquid refrigerant flows along the first refrigerant flow path 206 to the throttling device 204. The throttling device 204 reduces the pressure of the refrigerant, and the low-temperature and low-pressure liquid refrigerant flows along the second refrigerant flow path 207 to the evaporator 203. The refrigerant vaporizes and absorbs heat in the evaporator 203, cooling the flowing air stream. Subsequently, the vaporized low-temperature and low-pressure gaseous refrigerant flows back to the compressor 201 along the second refrigerant flow path 207.

[0046] Among them, the refrigerant in the second refrigerant flow path 207 is a low-temperature refrigerant. Therefore, the temperature of the air stream flowing through the second refrigerant flow path 207 will decrease after heat exchange with the second refrigerant flow path 207. The part of the second refrigerant flow path 207 located in the outdoor unit 100 of the air conditioner is the outdoor low-temperature part 3. The outdoor low-temperature part 3 can participate in the heat dissipation of the electronic control box 1 of the outdoor unit 100 of the air conditioner, improving the heat dissipation effect of the electronic control box 1.

[0047] As Figure 2 and Figure 3 shown, the outdoor unit 100 of the air conditioner includes: an electronic control box 1 and an air duct structure member 2. The electronic control box 1 includes a box body 11 and a circuit board 12. The circuit board 12 is arranged in the box body 11. The electronic control box 1 includes a heat dissipation air duct 13 located outside the box body 11 and used for heat dissipation. The air duct structure member 2 defines a refrigeration air duct 21. The refrigeration air duct 21 is in heat exchange cooperation with the outdoor low-temperature part 3 and is communicated with the heat dissipation air duct 13.

[0048] When the electronic control box 1 works, heat will be generated. And the greater the power of the electronic control box 1, the greater the heat generated by the circuit board 12 and the heating devices. The heat of the circuit board 12 and the heating devices is conducted to the box body 11, and the box body 11 exchanges heat with the air stream in the heat dissipation air duct 13 outside the box body 11 to dissipate heat from the electronic control box 1. However, the outdoor unit 100 of the air conditioner is arranged outdoors, and the temperature of the outdoor air stream is relatively high. The way of only using the outdoor air stream to dissipate heat from the box body 11 has a poor heat dissipation effect, resulting in a relatively high working temperature of the electronic control box 1, and there is a risk of damaging the electronic control box 1 and causing failure. In the related art, a large-sized electronic control box and a large radiator are used to accelerate the heat dissipation of the electronic control box to ensure the normal operation of the air conditioner. This way will increase the manufacturing cost; or the way of reducing the operating frequency of the compressor to reduce the heat generation of the electronic control box is used to ensure the normal operation of the air conditioner, which greatly affects the refrigeration effect of the air conditioner in the case of a relatively high outdoor use environment temperature and reduces the refrigeration effect of the air conditioner.

[0049] Therefore, the air conditioner outdoor unit 100 according to the embodiment of the present utility model is provided with an air duct structural member 2. The air duct structural member 2 defines a refrigeration air duct 21. The refrigeration air duct 21 is in heat exchange cooperation with the low-temperature part 3 of the outdoor unit. The air flow in the refrigeration air duct 21 exchanges heat with the low-temperature part 3 of the outdoor unit, so that the temperature of the air flow in the refrigeration air duct 21 is relatively low, and the low-temperature air flow in the refrigeration air duct 21 is guided to the heat dissipation air duct 13. The refrigeration air duct 21 forms an air duct that can provide cold by heat exchange cooperation with the low-temperature part 3 of the outdoor unit.

[0050] It should be noted that the heat exchange cooperation mode between the refrigeration air duct 21 and the low-temperature part 3 of the outdoor unit can be that the low-temperature part 3 of the outdoor unit is in direct contact with the air duct structural member 2 for heat exchange to cooperate with the refrigeration air duct 21; or it can also be that the low-temperature part 3 of the outdoor unit exchanges heat with the refrigeration air duct 21 at a distance through other components; or it can also be that the low-temperature part 3 of the outdoor unit exchanges heat with the refrigeration air duct 21 by thermal radiation, etc., all of which fall within the protection scope of the present utility model.

[0051] The temperature-lowered air flow after heat exchange with the low-temperature part 3 of the outdoor unit is used to dissipate heat from the electronic control box 1, improving the heat dissipation effect of the electronic control box 1, without the need to increase the volume of the electronic control box 1 or add a large radiator 4 to accelerate the heat dissipation of the electronic control box 1, reducing the manufacturing cost. And since the heat dissipation of the electronic control box 1 is good, there is no need to reduce the operating frequency of the compressor 201 to reduce the heat generation of the electronic control box 1, which can ensure the refrigeration effect of the air conditioner in a high outdoor use ambient temperature situation.

[0052] According to the air conditioner outdoor unit 100 of the embodiment of the present utility model, a refrigeration air duct 21 that exchanges heat with the low-temperature part 3 of the outdoor unit is formed through the air duct structural member 2. The refrigeration air duct 21 is communicated with the heat dissipation air duct 13, and the low-temperature air flow flowing through the refrigeration air duct 21 is guided to the electronic control box 1 to dissipate heat from the electronic control box 1. Without the need for components to improve specifications and increase the volume of the heat dissipation components, the heat dissipation effect of the electronic control box 1 is improved, effectively reducing the working temperature of the circuit board 12 of the electronic control box 1, which not only reduces the manufacturing cost but also improves the working reliability of the air conditioner outdoor unit 100.

[0053] In some embodiments of the present utility model, as Figure 2 and Figure 4 shown, at least a part of the low-temperature part 3 of the outdoor unit is arranged in the refrigeration air duct 21 for heat exchange cooperation with the refrigeration air duct 21.

[0054] At least a part of the low-temperature part 3 of the outdoor unit is directly arranged in the refrigeration air duct 21, and the air flow in the refrigeration air duct 21 directly contacts the low-temperature part 3 of the outdoor unit for heat exchange, which can improve the heat exchange efficiency, reduce energy loss, and is beneficial to improving the heat dissipation effect of the low-temperature air flow on the electronic control box 1.

[0055] In some embodiments of the present utility model, as Figure 4 shown, the low-temperature part 3 of the outdoor unit includes a refrigerant pipe 3a, and at least a part of the refrigerant pipe 3a extends into the refrigeration air duct 21. As Figure 4and Figure 5 As shown, the refrigerant flow path in the refrigerant pipe 3a is as shown by the dotted line with arrows in the figure.

[0056] It should be noted that the second refrigerant flow path 207 is connected between the throttling device 204 and the suction port of the compressor 201. The second condensation flow path is not only the refrigerant pipe 3a. The second refrigerant flow path 207 also includes components such as a gas-liquid separator communicated with the refrigerant pipe 3a. In some embodiments of the present invention, at least part of the refrigerant pipe 3a of the air conditioner outdoor unit 100 extends into the refrigeration air duct 21 to cooperate with the refrigeration air duct 21 for heat exchange.

[0057] The refrigerant pipe 3a has a small volume and weak interference with the air flow in the refrigeration air duct 21, which can improve the air flow mobility in the refrigeration air duct 21. And the refrigerant in the refrigerant pipe 3a circulates, which can continuously exchange heat with the refrigeration air duct 21 and improve the air flow heat exchange effect in the refrigeration air duct 21.

[0058] In some embodiments of the present invention, as Figure 4 and Figure 5 shown, the air conditioner outdoor unit 100 further includes a radiator 4. The radiator 4 is located in the refrigeration air duct 21 and conducts heat transfer in contact with the refrigerant pipe 3a.

[0059] The radiator 4 conducts heat transfer in contact with the refrigerant pipe 3a. The radiator 4 and the refrigerant pipe 3a have good thermal conductivity. By setting the radiator 4, the contact heat exchange area between the air flow and the refrigerant pipe 3a can be increased, and the heat exchange effect between the air flow and the refrigerant pipe 3a can be enhanced.

[0060] In some embodiments of the present invention, as Figure 4 and Figure 5 shown, the radiator 4 includes a plurality of heat dissipation fins 41 arranged at intervals. The plurality of heat dissipation fins 41 can further increase the contact heat exchange area with the air flow, thereby improving the heat exchange effect of the air flow.

[0061] The refrigerant pipe 3a passes through a plurality of heat dissipation fins 41. The heat dissipation fins 41 are arranged circumferentially around the refrigerant pipe 3a. The heat dissipation fins 41 are in contact with the entire circumference of the refrigerant pipe 3a. On the one hand, the installation stability of the heat dissipation fins 41 can be improved, and on the other hand, the heat transfer effect between the radiator 4 and the refrigerant pipe 3a can be improved.

[0062] In some embodiments of the present invention, as Figure 5 shown, the heat dissipation fins 41 are arranged at intervals in the thickness direction, and the refrigerant pipe 3a passes through a plurality of heat dissipation fins 41 in the thickness direction of the heat dissipation fins 41.

[0063] In some embodiments of the present invention, as Figure 3 shown, the radiator 4 is arranged closer to the inlet 21a of the refrigeration air duct than the outlet 21b of the refrigeration air duct. As Figure 5As shown, the flow-through gap 42 formed between adjacent heat dissipation fins 41 opens towards the inlet 21a of the refrigeration air duct.

[0064] The temperature of the air flow after passing through the radiator 4 decreases, making the temperature of the air duct section from the radiator 4 to the outlet 21b of the refrigeration air duct lower. By arranging the radiator 4 close to the inlet 21a of the refrigeration air duct and increasing the length of the air duct section from the radiator 4 to the outlet 21b of the refrigeration air duct, the heat exchange efficiency of the air flow during its flow in the refrigeration air duct 21 can be improved. And by arranging the radiator 4 close to the inlet 21a of the refrigeration air duct, the air resistance at the outlet 21b of the refrigeration air duct can be reduced, and the flow effect of the air flow flowing to the heat dissipation air duct 13 can be enhanced.

[0065] The air flow flows into the refrigeration air duct 21 from the inlet 21a of the refrigeration air duct and then can pass through the flow-through gap 42 and flow through the radiator 4. When the air flow flows in the flow-through gap 42, it fully contacts the heat dissipation fins 41, improving the heat exchange efficiency. By opening the flow-through gap 42 towards the inlet 21a of the refrigeration air duct, not only can the heat exchange effect of the air flow be improved, but also the air flow can be guided, which helps to form an orderly air flow path, improve the fluidity of the air flow, and is beneficial to the heat dissipation of the electronic control box 1.

[0066] In some embodiments of the present invention, as Figure 3 shown, the part of the low-temperature part 3 of the outdoor unit disposed in the refrigeration air duct 21 is arranged closer to the inlet 21a of the refrigeration air duct relative to the outlet 21b of the refrigeration air duct.

[0067] As Figure 3 shown, the distance L1 between the part of the low-temperature part 3 of the outdoor unit disposed in the refrigeration air duct 21 and the inlet 21a of the refrigeration air duct is less than the distance L2 between the part of the low-temperature part 3 of the outdoor unit disposed in the refrigeration air duct 21 and the outlet 21b of the refrigeration air duct. By arranging the low-temperature part 3 of the outdoor unit close to the inlet 21a of the refrigeration air duct, the length of the air duct section from the low-temperature part 3 of the outdoor unit to the outlet 21b of the refrigeration air duct is longer, and the heat exchange efficiency of the air flow during its flow in the refrigeration air duct 21 can be improved. And by arranging the low-temperature part 3 of the outdoor unit close to the inlet 21a of the refrigeration air duct, the air resistance at the outlet 21b of the refrigeration air duct can be reduced, and the flow effect of the air flow flowing to the heat dissipation air duct 13 can be enhanced.

[0068] In some embodiments of the present invention, as Figure 3 shown, the area of the inlet 21a of the refrigeration air duct is larger than the area of the outlet 21b of the refrigeration air duct.

[0069] The inlet 21a of the refrigeration air duct has a large area, which can increase the flow area of the air flow entering the refrigeration air duct 21, and is beneficial to improving the air intake volume of the refrigeration air duct 21. The outlet 21b of the refrigeration air duct has a small area, so that the flow speed of the air flow from the inlet 21a to the outlet 21b of the refrigeration air duct is accelerated, and the air flow can be quickly introduced into the heat dissipation air duct 13, reducing the energy loss of the air flow and improving the heat dissipation effect on the electronic control box 1.

[0070] And the part of the low-temperature part 3 of the outdoor unit located in the refrigeration air duct 21 is arranged relatively closer to the inlet 21a of the refrigeration air duct than the outlet 21b of the refrigeration air duct. At the same time, the inlet 21a of the refrigeration air duct has a relatively large area, which can make the air flow velocity at the inlet 21a of the refrigeration air duct relatively low, so that the air flow can fully contact and exchange heat with the low-temperature part 3 of the outdoor unit.

[0071] In some embodiments of the present invention, as Figure 2 shown, the air conditioner outdoor unit 100 includes a housing 5 and a middle partition 6 arranged in the housing 5. The space in the housing 5 includes a blower cavity 5a and a compressor cavity 5b separated on both sides of the middle partition 6. A blower is arranged in the blower cavity 5a, and the compressor 201 is arranged in the compressor cavity 5b.

[0072] As Figure 3 and Figure 4 shown, the housing 5 is provided with a ventilation opening 51 corresponding to the compressor cavity 5b. The air duct structure member 2 is located in the compressor cavity 5b. The refrigeration air duct 21 is communicated with the ventilation opening 51. The air duct inlet 13a of the heat dissipation air duct is located in the compressor cavity 5b and is communicated with the refrigeration air duct 21. The air duct outlet 13b of the heat dissipation air duct is located in the blower cavity 5a and is communicated with the air inlet side of the blower.

[0073] When the blower in the blower cavity 5a operates, air convection is generated in the blower cavity 5a, that is, a negative pressure is formed at the air duct outlet 13b. Under the action of the negative pressure, the air duct inlet 13a of the heat dissipation air duct sucks the air flow from the refrigeration air duct 21, and the air flow flows into the heat dissipation air duct 13 to dissipate heat from the electronic control box 1. As Figure 3 shown, the dotted line with an arrow is the air flow direction. The air flow flows from the refrigeration air duct 21 into the air duct inlet 13a and flows along the heat dissipation air duct 13, and finally flows out from the air duct outlet 13b of the heat dissipation air duct.

[0074] At the same time, the flow of the air flow in the heat dissipation air duct 13 also drives the outside air flow to flow into the compressor cavity 5b from the ventilation opening 51 and flow into the refrigeration air duct 21 for heat exchange to provide a flowing heat dissipation air flow for the heat dissipation air duct 13.

[0075] Using the operation of the wind wheel to drive the air flow in the refrigeration air duct 21 into the heat dissipation air duct 13 can save the cost of separately arranging a driving member in the heat dissipation air duct 13 or the refrigeration air duct 21, and can also reduce the structural complexity and the air flow resistance.

[0076] In some embodiments of the present utility model, as Figure 3 shown, the electric control box 12 further includes an electric control radiator 15. The electric control radiator 15 is at least partially located outside the box body 11, and the electric control radiator 15 is arranged at the air duct outlet 13b of the heat dissipation air duct.

[0077] The electric control radiator 15 is used for heat exchange with the heating devices in the electric control box 1, and conducts the heat to the radiator 4, thereby accelerating the heat dissipation of the electric control box 1. It should be noted that the heat exchange method between the radiator 4 and the heating devices is not limited. For example, it can be direct or indirect contact heat transfer, or heat radiation heat transfer with a small gap, etc.

[0078] By arranging the electric control radiator 15 at the air duct outlet 13b of the heat dissipation air duct, the temperature of the air flow flowing through the heat dissipation air duct 13 and exchanging heat with the box body 11 is still lower than the outdoor air flow temperature. By using the air flow flowing through the heat dissipation air duct 13 and exchanging heat with the box body 11 to exchange heat with the electric control radiator 15 again, the air flow can be reused, and the electric control box 1 can be cooled again, improving the heat dissipation effect of the electric control box 1.

[0079] In some embodiments of the present utility model, as Figure 4 and Figure 5 shown, the air duct structure member 2 is formed in the form of a wind cylinder with both ends open. One end of the air duct structure member 2 extends towards the ventilation opening 51 so that the refrigeration air duct 21 communicates with the ventilation opening 51, and the other end of the air duct structure member 2 extends to the air duct inlet 13a of the heat dissipation air duct to communicate with the heat dissipation air duct 13. For example, in some examples, one end of the air duct structure member 2 can extend to the ventilation opening 51 and cover the ventilation opening 51 to communicate with the ventilation opening 51. At this time, the radiator 4 can be completely located inside the air duct structure member 2. Or, in some other examples, one end of the air duct structure member 2 can also extend to a certain distance from the ventilation opening 51, that is, it does not reach the position of the ventilation opening 51. At this time, the radiator 4 can be at least partially located inside the air duct structure member 2.

[0080] The refrigeration air duct 21 defined by the air duct structure member 2 introduces the air flow outside the housing 5 from the ventilation opening 51, and the air flow exchanges heat in the refrigeration air duct 21 and then flows into the heat dissipation air duct 13 to dissipate heat from the electric control box 1.

[0081] As Figure 4 shown, the ventilation opening 51 is arranged adjacent to the inlet 21a of the refrigeration air duct to facilitate transporting the air flow outside the housing 5 into the refrigeration air duct 21, and can reduce the structural complexity of the air duct structure member 2 and save the manufacturing cost.

[0082] In some embodiments of the present utility model, as Figure 3 and Figure 4 shown, the air duct structure member 2 is formed in a gradually expanding cylindrical shape with a gradually increasing cross-section from the heat dissipation air duct 13 to the ventilation opening 51.

[0083] The cross-sectional area of the refrigeration air duct 21 at the connection between the air duct structure member 2 and the ventilation opening 51 is larger than that of the refrigeration air duct 21 at the connection between the air duct structure member 2 and the heat dissipation air duct 13, which is beneficial to increasing the air intake volume of the refrigeration air duct 21, and the flow rate of the air flowing from the ventilation opening 51 to the heat dissipation air duct 13 is increased, so that the air can be quickly introduced into the heat dissipation air duct 13, reducing the air flow energy loss and improving the heat dissipation effect on the electronic control box 1.

[0084] In some embodiments of the present invention, such as Figure 2 and Figure 5 shown, the air conditioner outdoor unit 100 further includes an outdoor heat exchanger 7.

[0085] In some embodiments of the present invention, such as Figure 2 shown, the electronic control box 1 is arranged above the middle partition 6, the air duct structure member 2 is arranged above the compressor 201, and the ventilation opening 51 is located on the side of the compressor chamber 5b away from the fan chamber 5a.

[0086] The air duct structure member 2 is arranged above the compressor 201, and the arrangement height of the air duct structure member 2 is similar to the installation height of the electronic control box 1, which is beneficial to transporting the external air flow of the housing 5 into the refrigeration air duct 21, and can reduce the structural complexity of the air duct structure member 2 and save the manufacturing cost. And arranging the air duct structure member 2 above the compressor 201 can reduce the interference with the compressor 201 and facilitate the arrangement of the air duct structure member 2.

[0087] The fan chamber 5a is used for heat exchange of the outdoor heat exchanger 7. Arranging the ventilation opening 51 on the side of the compressor chamber 5b away from the fan chamber 5a can reduce the heat interference of the outdoor heat exchanger 7 on the air intake of the refrigeration air duct 21.

[0088] In some embodiments, the middle partition 5 separates the outdoor heat exchanger 7 in the fan chamber 5a. When the fan operates, air convection is generated, and air enters the fan chamber 5a to dissipate heat from the outdoor heat exchanger 7. The compressor 201 is arranged in the compressor chamber 5b, which can reduce the heat interference of the outdoor heat exchanger 7 on the compressor 201.

[0089] In some embodiments of the present invention, such as Figure 6 and Figure 7 shown, the air conditioner includes an outdoor heat exchanger 7 and an indoor heat exchanger 8. The refrigerant circulation system 200 includes a four-way valve 205, and the four-way valve 205 is used to switch one of the outdoor heat exchanger 7 and the indoor heat exchanger 8 as the condenser 202 while the other is used as the evaporator 203.

[0090] The four-way valve 205 can switch the circulation path of the refrigerant in the refrigerant circulation system 200, such as Figure 6 and Figure 7As shown, the solid line with an arrow represents the circulation path of the refrigerant in the refrigerant circulation system 200 when the air conditioner cools the indoor space. At this time, the four-way valve 205 connects the exhaust port of the compressor 201 to the outdoor heat exchanger 7 and the suction port of the compressor 201 to the indoor heat exchanger 8. The outdoor heat exchanger 7 serves as the condenser 202, and the indoor heat exchanger 8 serves as the evaporator 203.

[0091] After the refrigerant is discharged from the exhaust port of the compressor 201, it flows through the four-way valve 205 to the outdoor heat exchanger 7 which is connected, and the outdoor heat exchanger 7 serves as the condenser 202. Subsequently, the refrigerant flows from the outdoor heat exchanger 7 to the throttling device 204, and then from the throttling device 204 to the indoor heat exchanger 8. The refrigerant vaporizes and absorbs heat in the indoor heat exchanger 8 to cool the indoor space, and the indoor heat exchanger 8 serves as the evaporator 203. Finally, the refrigerant flows back to the compressor 201 through the four-way valve 205 from the evaporator 203, completing the refrigerant cycle.

[0092] As Figure 6 and Figure 7 shown, the dashed line with an arrow represents the circulation path of the refrigerant in the refrigerant circulation system 200 when the air conditioner heats the indoor space. At this time, the four-way valve 205 connects the exhaust port of the compressor 201 to the indoor heat exchanger 8 and the suction port of the compressor 201 to the outdoor heat exchanger 7. The outdoor heat exchanger 7 serves as the evaporator 203, and the indoor heat exchanger 8 serves as the condenser 202.

[0093] After the refrigerant is discharged from the exhaust port of the compressor 201, it flows through the four-way valve 205 to the indoor heat exchanger 8 which is connected. The high-temperature and high-pressure gaseous refrigerant liquefies and releases heat in the indoor heat exchanger 8, and the indoor heat exchanger 8 serves as the condenser 202. Subsequently, the refrigerant flows from the indoor heat exchanger 8 to the throttling device 204, and then from the throttling device 204 to the outdoor heat exchanger 7. The refrigerant vaporizes and absorbs heat in the outdoor heat exchanger 7, and the outdoor heat exchanger 7 serves as the evaporator 203. Finally, the refrigerant flows back to the compressor 201 through the four-way valve 205 from the evaporator 203, completing the refrigerant cycle.

[0094] In some embodiments of the present invention, as Figure 6 shown, the refrigerant pipe 3a includes a first refrigerant pipe 31 connected between the four-way valve 205 and the suction port of the compressor 201. At least a part of the first refrigerant pipe 31 extends into the refrigeration air duct 21 to cooperate with the refrigeration air duct 21 for heat exchange.

[0095] The refrigerant in the first refrigerant pipe 31 has flowed through the evaporator 203 and flows back to the suction port of the compressor 201 through the four-way valve 205. The refrigerant in the first refrigerant pipe 31 is low-temperature refrigerant. At least a part of the first refrigerant pipe 31 extends into the refrigeration air duct 21 to cooperate with the refrigeration air duct 21 for heat exchange, so as to reduce the temperature of the air flow in the refrigerant air duct and improve the heat dissipation effect of the electronic control box 1.

[0096] In other embodiments of the present invention, asFigure 7 As shown, the refrigerant pipe 3a includes a second refrigerant pipe 32 connected between the throttling device 204 and the indoor heat exchanger 8, and at least a part of the second refrigerant pipe 32 extends into the refrigeration air duct 21 to cooperate with the refrigeration air duct 21 for heat exchange.

[0097] The refrigerant in the second refrigerant pipe 32 has not yet flowed through the evaporator 203. The refrigerant in the second refrigerant pipe 32 is a low-temperature refrigerant. At least a part of the second refrigerant pipe 32 extends into the refrigeration air duct 21 to cooperate with the refrigeration air duct 21 for heat exchange, so as to reduce the temperature of the air flow in the refrigerant air duct and improve the heat dissipation effect of the electronic control box 1.

[0098] In some embodiments of the present invention, as Figure 1 and Figure 8 shown, the air conditioner includes an outdoor heat exchanger 7 and an indoor heat exchanger 8. The air conditioner is a single-cooling air conditioner. The outdoor heat exchanger 7 is used as a condenser 202, and the indoor heat exchanger 8 is used as an evaporator 203. As Figure 1 shown, the refrigerant pipe 3a includes a third refrigerant pipe 33 connected between the throttling device 204 and the indoor heat exchanger 8, and at least a part of the third refrigerant pipe 33 extends into the refrigeration air duct 21 to cooperate with the refrigeration air duct 21 for heat exchange.

[0099] The refrigerant in the third refrigerant pipe 33 has not yet flowed through the evaporator 203. The refrigerant in the third refrigerant pipe 33 is a low-temperature refrigerant. At least a part of the third refrigerant pipe 33 extends into the refrigeration air duct 21 to cooperate with the refrigeration air duct 21 for heat exchange, so as to reduce the temperature of the air flow in the refrigerant air duct and improve the heat dissipation effect of the electronic control box 1.

[0100] In other embodiments of the present invention, as Figure 8 shown, the refrigerant pipe 3a includes a fourth refrigerant pipe 34 connected between the indoor heat exchanger 8 and the suction port of the compressor 201, and at least a part of the fourth refrigerant pipe 34 extends into the refrigeration air duct 21 to cooperate with the refrigeration air duct 21 for heat exchange.

[0101] The refrigerant in the fourth refrigerant pipe 34 has already flowed through the evaporator 203. The temperature of the refrigerant in the fourth refrigerant pipe 34 is still relatively low. At least a part of the fourth refrigerant pipe 34 extends into the refrigeration air duct 21 to cooperate with the refrigeration air duct 21 for heat exchange, so as to reduce the temperature of the air flow in the refrigerant air duct and improve the heat dissipation effect of the electronic control box 1.

[0102] In some embodiments of the present invention, the throttling device 204 in the refrigerant circulation system 200 is an electronic expansion valve.

[0103] In some embodiments of the present invention, as Figure 3 shown, the box body 11 is a sealed box.

[0104] It should be noted that with the improvement of environmental protection requirements for the refrigerant in the air conditioner, refrigerant R290 is gradually replacing traditional refrigerants such as R32 in air conditioners due to its cleanliness, which does not damage the ozone layer and has a minimal impact on the greenhouse effect. However, R290 refrigerant is flammable. When the R290 refrigerant leaks at a low concentration, it may catch fire and explode when encountering a low-energy spark. Therefore, the safety performance of using R290 refrigerant needs to be ensured.

[0105] In some embodiments of the present invention, by designing the box body 11 of the electric control box 1 as a sealed box, it is possible to prevent the leakage of flammable refrigerant from coming into contact with the heating devices and electrical components inside the electric control box 1, thus improving safety.

[0106] In some embodiments of the present invention, such as Figure 3 and Figure 4 shown, the box body 11 is a sealed box. The electric control box 1 includes an outer cover 14, and a heat dissipation air duct 13 is formed between the outer cover 14 and the box body 11.

[0107] The box body 11 is a sealed box, which isolates the components inside the box body 11 from the external environment, improving the safety of use. The heat of the circuit board 12 and the heating devices is conducted to the box body 11, and heat dissipation is carried out through the air flow in the heat dissipation air duct 13 formed between the box body 11 and the outer cover 14.

[0108] In some embodiments of the present invention, such as Figure 3 and Figure 4 shown, the outer cover 14 is configured as a structure that opens towards the box body 11, and the outer cover 14 and the box body 11 are spaced apart to form a heat dissipation air duct 13 between the outer cover 14 and the box body 11.

[0109] In some other embodiments of the present invention, the electric control box 1 includes an outer cover 14, a heat dissipation air duct 13 is formed between the outer cover 14 and the box body 11, and there is also an air flow channel for air flow inside the box body 11. The air flow transported from the refrigeration air duct 21 can flow into the heat dissipation air duct 13 to dissipate heat from the box body 11, and the air flow can also directly flow into the box body 11 to directly contact and exchange heat with the circuit board 12 and the heating devices inside the box body 11.

[0110] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0111] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0112] In the present utility model, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication connection; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0113] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0114] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc., mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0115] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.

Claims

1. An outdoor unit of an air conditioner, characterized in that, The air conditioner to which the outdoor unit of the air conditioner is applied includes a refrigerant circulation system. The refrigerant circulation system includes a compressor, a condenser, an evaporator, and a throttling device. The condenser is provided on a first refrigerant flow path from the exhaust port of the compressor to the throttling device. The evaporator is provided on a second refrigerant flow path between the throttling device and the suction port of the compressor. The portion of the second refrigerant flow path located inside the outdoor unit of the air conditioner is the low-temperature part of the outdoor unit; The outdoor unit of the air conditioner includes: An electric control box, which includes a box body and a circuit board. The circuit board is provided inside the box body. The electric control box includes a heat dissipation air duct located outside the box body and used for heat dissipation; An air duct structure member that defines a refrigeration air duct. The refrigeration air duct is in heat exchange cooperation with the low-temperature part of the outdoor unit and is communicated with the heat dissipation air duct.

2. The air conditioner outdoor unit according to claim 1, characterized in that, At least a part of the low-temperature part of the outdoor unit is provided inside the refrigeration air duct to be in heat exchange cooperation with the refrigeration air duct.

3. The air conditioner outdoor unit according to claim 2, characterized in that, The low-temperature part of the outdoor unit includes a refrigerant pipe, and at least a part of the refrigerant pipe extends into the refrigeration air duct.

4. The air conditioner outdoor unit according to claim 3, characterized in that, The outdoor unit of the air conditioner further includes a radiator, which is located inside the refrigeration air duct and is in contact heat transfer with the refrigerant pipe.

5. The air conditioner outdoor unit according to claim 4, characterized in that, The radiator includes a plurality of heat dissipation fins arranged at intervals, and the refrigerant pipe passes through a plurality of the heat dissipation fins.

6. The air conditioner outdoor unit according to claim 5, characterized in that, The outlet of the radiator relative to the refrigeration air duct is arranged closer to the inlet of the refrigeration air duct, and the flow-through gap formed between adjacent heat dissipation fins faces the inlet of the refrigeration air duct and is open.

7. The air conditioner outdoor unit according to claim 2, wherein, The part of the low-temperature part of the outdoor unit provided inside the refrigeration air duct is arranged closer to the inlet of the refrigeration air duct relative to the outlet of the refrigeration air duct.

8. The air conditioner outdoor unit according to claim 7, wherein The inlet area of the refrigeration air duct is larger than the outlet area of the refrigeration air duct.

9. The air conditioner outdoor unit according to any one of claims 1-8, characterized in that, The outdoor unit of the air conditioner includes a housing and a middle partition plate provided inside the housing. The space inside the housing includes a blower cavity and a compressor cavity separated on both sides of the middle partition plate. A blower is provided in the blower cavity, the compressor is provided in the compressor cavity, the housing is provided with a ventilation opening corresponding to the compressor cavity, the air duct structure member is located in the compressor cavity, the refrigeration air duct is communicated with the ventilation opening, the air duct inlet of the heat dissipation air duct is located in the compressor cavity and is communicated with the refrigeration air duct, and the air duct outlet of the heat dissipation air duct is located in the blower cavity and is communicated with the air inlet side of the blower.

10. The air conditioner outdoor unit according to claim 9, wherein, The air duct structure member is formed in the form of a wind cylinder with both ends open. One end of the air duct structure member extends towards the ventilation opening so that the refrigeration air duct is communicated with the ventilation opening, and the other end of the air duct structure member extends to the air duct inlet of the heat dissipation air duct to be communicated with the heat dissipation air duct.

11. The air conditioner outdoor unit according to claim 10, characterized in that, The air duct structure member is formed in a gradually expanding cylindrical shape with a gradually increasing cross-section from the heat dissipation air duct to the ventilation opening.

12. The air conditioner outdoor unit according to claim 10, characterized in that, The electric control box is provided above the middle partition plate, the air duct structure member is provided above the compressor, and the ventilation opening is located on the side of the compressor cavity far from the blower cavity.

13. The outdoor air conditioner according to any one of claims 3-8, characterized in that, The air conditioner includes an outdoor heat exchanger and an indoor heat exchanger. The refrigerant circulation system includes a four-way valve, and the four-way valve is used to switch one of the outdoor heat exchanger and the indoor heat exchanger to be used as the condenser while the other is used as the evaporator; The low-temperature part of the outdoor unit includes a refrigerant pipe; Among them, the refrigerant pipe includes a first refrigerant pipe connected between the four-way valve and the suction port of the compressor, and at least a part of the first refrigerant pipe extends into the refrigeration air duct to cooperate with the refrigeration air duct for heat exchange; Alternatively, the refrigerant pipe includes a second refrigerant pipe connected between the throttling device and the indoor heat exchanger, and at least a part of the second refrigerant pipe extends into the refrigeration air duct to cooperate with the refrigeration air duct for heat exchange.

14. The air conditioner outdoor unit according to any one of claims 3-8, characterized in that, The air conditioner includes an outdoor heat exchanger and an indoor heat exchanger. The air conditioner is a single-cooling air conditioner. The outdoor heat exchanger is used as the condenser, and the indoor heat exchanger is used as the evaporator; The low-temperature part of the outdoor unit includes a refrigerant pipe; Among them, the refrigerant pipe includes a third refrigerant pipe connected between the throttling device and the indoor heat exchanger, and at least a part of the third refrigerant pipe extends into the refrigeration air duct to cooperate with the refrigeration air duct for heat exchange; Alternatively, the refrigerant pipe includes a fourth refrigerant pipe connected between the indoor heat exchanger and the suction port of the compressor, and at least a part of the fourth refrigerant pipe extends into the refrigeration air duct to cooperate with the refrigeration air duct for heat exchange.

15. The air conditioner outdoor unit according to claim 1, characterized in that, The box body is a closed box; and / or, the electric control box includes an outer cover, and a heat dissipation air duct is formed between the outer cover and the box body.

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