Air conditioner outdoor unit and air conditioner

Abstract

The air conditioner outdoor unit comprises a condenser, a draught fan and an electric appliance box, an electric device capable of heating is arranged in the electric appliance box, the electric appliance box is provided with a first air inlet and an air outlet, the draught fan can generate negative pressure at the air outlet when working, and therefore the negative pressure can be generated at the air outlet under the condition that no extra draught fan is added. Forced convection of the electric appliance box is achieved, and the cooling efficiency of the electric appliance box is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and particularly relates to an outdoor unit of an air conditioner and an air conditioner. Background Art

[0002] With the development of air conditioner technology, air conditioning equipment has continuously broken through the refrigeration and heating technologies under extreme working conditions. Therefore, it is necessary to ensure the stable operation of the outer electrical box, and it is necessary to cool the components on the main board inside the electrical box.

[0003] In the prior art, in order to improve the cooling of the electrical box, it is necessary to additionally set up a fan to force the air to flow, so as to accelerate the cooling of the electrical box. For this reason, the components near the electrical box increase, and the outdoor unit of the air conditioner becomes more complex, which also leads to an increase in the noise of the outer diameter.

[0004] How to improve the cooling efficiency of the electrical box of the air conditioner without adding an additional fan is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0005] The present invention provides an outdoor unit of an air conditioner and an air conditioner, which can achieve forced convection of the electrical box without adding an additional fan, and improve the cooling efficiency of the electrical box.

[0006] On the one hand, the present invention provides an outdoor unit of an air conditioner, including a condenser, a fan and an electrical box. An electrical component capable of generating heat is arranged in the electrical box. The electrical box is provided with a first air inlet and an air outlet, and the operation of the fan can generate negative pressure at the air outlet.

[0007] In some embodiments, the outdoor unit of the air conditioner includes a partition board. The electrical box and the partition board together form a separating member, and the separating member divides the inner cavity of the outdoor unit of the air conditioner into a first cavity and a second cavity. The fan is arranged in the first cavity, the first air inlet faces the second cavity, and the air outlet faces the first cavity.

[0008] In some embodiments, the electrical component includes a circuit board, and a first flow path is formed between the circuit board and the side wall of the electrical box. The first flow path communicates the first air inlet and the air outlet.

[0009] In some embodiments, a second air inlet is further arranged on the side wall of the electrical box. The first air inlet is located at the bottom of the electrical box. The second air inlet is located above the first air inlet and faces the second cavity. The second air inlet and the air outlet are located on both sides of the circuit board; a second flow path is formed between the second air inlet and the first air inlet.

[0010] In some embodiments, a plurality of through holes are arranged on the circuit board.

[0011] In some embodiments, the first air inlet is rectangular, and the width of the first air inlet is not greater than 1 mm.

[0012] In some embodiments, the air outlet is above the first air inlet and at least 100 mm higher than the first air inlet.

[0013] In some embodiments, the electrical box includes a heat dissipation part, and the heat dissipation part includes a plurality of heat dissipation fins. When a first cavity is provided, the plurality of heat dissipation fins are arranged in the first cavity, and the extending direction of the interval between two adjacent heat dissipation fins is consistent with the flowing direction of the air flow generated by the operation of the fan.

[0014] In some embodiments, the heat dissipation part is in contact with the circuit board; a first heat generating component and a second heat generating component are arranged on the circuit board. Per unit time, the first heat generating component generates more heat than the second heat generating component; in the projection in the thickness direction of the circuit board, at least part of the heat dissipation part coincides with the first heat generating component, and at least part of the second heat generating component coincides with the first flow passage.

[0015] On the other hand, the present invention also provides an air conditioner, including the air conditioner outdoor unit described above.

[0016] By providing an air outlet and a first air inlet in the electrical box in the present invention, the fan originally existing in the air conditioner outdoor unit forms a negative pressure at the air outlet during operation. This negative pressure can control the air to enter the electrical box from the first air inlet and discharge from the air outlet. In this way, the circuit board in the electrical box can be cooled. Compared with the prior art, it is possible to achieve forced driving of the air in the electrical box without additionally arranging a fan to drive the air flow, improving the cooling efficiency of the electrical box and simplifying the structure of the outdoor unit of the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. The drawings in the following description are only exemplary. For those of ordinary skill in the art, without creative efforts, other implementation drawings can be obtained according to the provided drawings.

[0018] Figure 1 is a schematic diagram of the air conditioner outdoor unit in the embodiment of the present invention after removing the outer shell;

[0019] Figure 2 is a schematic diagram of the electrical box from the first perspective in the embodiment of the present invention;

[0020] Figure 3 is a schematic diagram of the electrical box from the second perspective in the embodiment of the present invention;

[0021] Figure 4 It is a first perspective view schematic diagram when the electrical box of the embodiment of the present invention is provided with a heat dissipation part;

[0022] Figure 5 It is a second perspective view schematic diagram when the electrical box of the embodiment of the present invention is provided with a heat dissipation part;

[0023] The reference signs are as follows:

[0024] 1. Electrical box; 2. Circuit board; 3. Condenser; 401. First air inlet; 402. Second air inlet; 501. First cavity; 502. Second cavity; 6. Air outlet; 7. Partition board; 8. Heat dissipation part. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment below is actually only illustrative and in no way restricts the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation words such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description. Without contrary explanations, these orientation words do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation, so they cannot be understood as limiting the protection scope of the present invention; the orientation words "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0027] For ease of description, spatial relative terms, such as "above", "over", "on the upper surface", "upper", etc., may be used herein to describe the spatial positional relationship of one device or feature to other devices or features as shown in the figures. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "over" other devices or structures will then be positioned "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can include both the orientations of "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations of the spatial relative descriptions used herein will be made.

[0028] In addition, it should be noted that the use of terms such as "first" and "second" to define components is only for the convenience of differentiating the corresponding components. Without additional statements, the above terms have no special meanings and thus should not be construed as limiting the protection scope of the present invention.

[0029] The present invention provides an outdoor unit of an air conditioner and an air conditioner, which can achieve forced convection of an electrical box without adding an additional fan, and improve the cooling efficiency of the electrical box.

[0030] Referring to Figures 1-5 As shown, an outdoor unit of an air conditioner includes a condenser 3, a fan, and an electrical box 1. An electrical component capable of generating heat is disposed in the electrical box 1. The electrical box 1 is provided with a first air inlet 401 and an air outlet 6. When the fan operates, a negative pressure can be generated at the air outlet 6.

[0031] "Negative pressure" is lower than one standard atmospheric pressure compared with the standard atmospheric pressure.

[0032] The fan is a fan of an existing outdoor unit of an air conditioner. The airflow generated by the operation of the fan passes through the condenser 3, accelerating the heat exchange between the condenser 3 and the air. The airflow generated by the operation of the fan generates a negative pressure at the air outlet 6. This negative pressure enables the air in the electrical box 1 to flow out from the air outlet 6. The air flowing out from the air outlet 6 of the electrical box 1 further causes a negative pressure to be generated in the electrical box 1. The air outside the electrical box 1 enters the electrical box 1 from the first air inlet 401 under the action of the negative pressure inside the electrical box 1. Thus, the operation of the fan can enable the external air to enter the electrical box 1 through the first air inlet 401 and flow out from the air outlet 6. The air flows in the electrical box 1 and passes through the electrical components, accelerating the heat exchange between the electrical components in the electrical box 1 and the air, and thereby improving the heat dissipation efficiency of the electrical components. The operation of the fan forms the effect of forced convection.

[0033] Further, the blower is an axial-flow blower. The condenser 3 is located on the side where the axial-flow blower generates negative pressure.

[0034] Further, the outer shell of the electrical box 1 is made of high-strength plastic, having good weather resistance and anti-aging performance.

[0035] Further, insect-proof nets can be provided at the first air inlet 401 and the air outlet 6.

[0036] Preferably, as Figure 1 shown, the air conditioner outdoor unit includes a partition 7. The electrical box 1 and the partition 7 together form a separating member. The separating member divides the inner cavity of the air conditioner outdoor unit into a first cavity 501 and a second cavity 502. The blower is arranged in the first cavity 501. The first air inlet 401 faces the second cavity 502, and the air outlet 6 faces the first cavity 501.

[0037] By the electrical box 1 and the partition 7 together forming a separating member, the second cavity 502 and the first cavity 501 are connected via the electrical box 1. The electrical box 1 is also provided with a flow passage. When the blower works, the air in the second cavity 502 can basically only enter the electrical box 1 from the first air inlet 401 and then be discharged from the air outlet 6. In this way, it is avoided that the air discharged from the air outlet 6 enters the electrical box 1 again from the first air inlet 401, improving the heat dissipation efficiency of the electrical box 1.

[0038] The natural flow (natural convection) of air can also form a cooling effect on the electrical box 1.

[0039] Preferably, as Figure 5 shown, the electrical component includes a circuit board 2. A first flow path is formed between the circuit board 2 and the side wall of the electrical box 1. The first flow path communicates the first air inlet 401 and the air outlet 6.

[0040] By forming a first flow path between the circuit board 2 and the side wall of the electrical box 1, and the first flow path communicating the first air inlet 401 and the air outlet 6, the circuit board 2 forms the boundary of the first flow path. When air flows in the electrical box 1, the air exchanges heat fully with the circuit board 2, improving the heat dissipation effect on the circuit board 2.

[0041] The circuit board 2 (including various components) is responsible for controlling the various functions of the electrical box 1.

[0042] Preferably, as Figure 2 and Figure 3As shown, a second air inlet 402 is further provided on the side wall of the electrical box 1. The first air inlet 401 is located at the bottom of the electrical box 1. The second air inlet 402 is above the first air inlet 401 and faces the second cavity 502. The second air inlet 402 and the air outlet 6 are located on both sides of the circuit board 2. A second flow path is formed between the second air inlet 402 and the first air inlet 401.

[0043] That is to say, the second air inlet 402 and the air outlet 6 are respectively arranged on two opposite side walls of the electrical box 1. Air can not only enter the interior of the electrical box 1 from the first air inlet 401 located at the bottom of the electrical box 1, but also enter the interior of the electrical box 1 from the second air inlet 402. Since the second air inlet 402 and the air outlet 6 are respectively arranged on both sides of the circuit board 2, after the air enters the electrical box 1, the air can flow through both sides of the circuit board 2, thereby performing sufficient heat exchange on the circuit board 2 and the components on the circuit board 2, improving the heat dissipation efficiency of the circuit board 2. Since there are electronic components on the circuit board 2, the electronic components will also generate a large amount of heat. No matter which side of the circuit board 2 the electronic components are arranged on, they can fully exchange heat with the air.

[0044] Preferably, a plurality of through holes are provided on the circuit board 2.

[0045] The air entering the electrical box 1 can pass through the through holes on the circuit board 2. On the one hand, it improves the heat dissipation of the circuit board 2. On the other hand, it increases the flow path of the air inside the circuit board 2, and can improve the heat exchange efficiency between the air and the circuit board 2 and the electronic components on the circuit board 2.

[0046] Preferably, as Figure 3 shown, the first air inlet 401 is rectangular, and the width of the first air inlet 401 is not greater than 1 mm.

[0047] By making the width of the first air inlet 401 not greater than 1 mm, it is beneficial to prevent insects from entering the interior of the electrical box 1.

[0048] Preferably, as Figure 3 shown, the air outlet 6 is above the first air inlet 401 and is at least 100 mm higher than the first air inlet 401.

[0049] By arranging the air outlet 6 above the first air inlet 401 and being 100 mm higher than the first air inlet 401, it is possible to prevent external rainwater from entering the electrical box 1 from the first air inlet 401.

[0050] Preferably, as Figure 1 and Figure 4As shown, the electrical box 1 includes a heat dissipation part 8, and the heat dissipation part 8 includes a plurality of heat dissipation fins. When a first cavity 501 is provided, the plurality of heat dissipation fins are arranged in the first cavity 501, and the extending direction of the interval between two adjacent heat dissipation fins is consistent with the flowing direction of the air flow generated by the operation of the fan.

[0051] By providing the heat dissipation fins, the heat dissipation effect of the electrical box 1 is improved. The extending direction of the interval formed by the heat dissipation fins is consistent with the flowing direction of the current generated by the operation of the motor. When the motor operates, air can flow through the interval. In this way, the convective heat transfer effect between the heat dissipation fins and the air is accelerated; at the same time, the heat dissipation fins also have a guiding effect on the flow of air, enabling the air to flow more quickly and stably, increasing the speed of the air flowing through the condenser 3, and improving the heat exchange efficiency between the air and the condenser 3.

[0052] Furthermore, the fan can rotate forward and backward. When the weather is hot (such as in summer, when the weather temperature is higher than 30°C), the air conditioner cools, and the fan rotates backward. Under the action of the fan, air first flows through the heat dissipation fins and then through the condenser 3, preventing the temperature of the air from being too high after flowing through the condenser 3, which may lead to a decrease in the heat dissipation effect of the heat dissipation fins. When the weather is cold (such as in winter, when the weather temperature is lower than 10°C and higher than 0°C), the air conditioner heats. Since the energy required for the air conditioner to cool is lower than the energy required for the air conditioner to heat, the power required for the air conditioner to raise the temperature of the air by a certain amount during heating is much higher than the power required for the air conditioner to lower the temperature of the air by a certain amount during cooling. This means that when the air conditioner is heating, the electrical box 1 generates more heat. When the air conditioner is heating, the fan rotates forward. Under the action of the fan, air first flows through the condenser 3 and then through the heat dissipation fins. When the air flows through the condenser 3, since the temperature of the condenser 3 is lower, the temperature of the air is also lower. The lower-temperature air can cool the electrical box 1 more quickly when flowing through the heat dissipation fins. Even further, when the weather temperature is lower than 0°C and the electrical box 1 is inside the outdoor unit, only outdoor air is needed to cool the electrical box 1. At this time, the fan rotates backward, and the air first flows through the heat dissipation fins. After the air flows through the heat dissipation fins, its temperature rises. The air with the increased temperature then flows through the condenser 3, which is beneficial to improving the heat exchange effect between the condensation inside the condenser 3 and the external air, and is beneficial to improving the heating effect of the air conditioner.

[0053] Preferably, the heat dissipation part 8 is in contact with the circuit board 2; a first heat generating component and a second heat generating component are provided on the circuit board 2. Per unit time, the first heat generating component generates more heat than the second heat generating component; in the projection in the thickness direction of the circuit board 2, the heat dissipation part 8 at least partially overlaps with the first heat generating component, and the second heat generating component at least partially overlaps with the first flow path.

[0054] Since the heat absorption rate of the heat dissipation part 8 from the circuit board 2 in contact with the circuit board 2 is higher than that of the air from the circuit board 2 in contact with the circuit board 2. The heat generated by the first heat generating component per unit time is higher than that generated by the second heat generating component per unit time. Through the above settings, the heat generated by the first heat generating component will be transferred to the circuit board 2, and the heat dissipation part 8 can dissipate heat from this part of the circuit board 2 more quickly; the heat generated by the second heat generating component will also be transferred to the circuit board 2, and the air flowing in the first flow path dissipates heat from this part of the circuit board 2 (the circuit board 2 where the second heat generating component is provided). By dissipating heat from different parts of the circuit board 2 as described above, the limited heat dissipation part 8 can dissipate heat from the first heat generating component with higher heat dissipation requirements, avoiding excessive local temperature of the circuit board 2 and enabling the circuit board 2 to operate stably.

[0055] The present invention also provides an air conditioner, including the outdoor unit of the air conditioner described above.

[0056] The electrical box of the air conditioner can be maintained at a lower temperature and can operate at a stable temperature, and the air conditioner operates stably.

[0057] It is easy for those skilled in the art to understand that, on the premise of no conflict, the advantageous technical features of the above various methods can be freely combined and superimposed.

[0058] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An outdoor unit of an air conditioner, comprising a fan and an electrical box (1), characterized in that, An electrical component capable of generating heat is provided inside the electrical box (1). The electrical box (1) is provided with a first air inlet (401) and an air outlet (6). When the blower operates, a negative pressure is generated at the air outlet (6).

2. The air conditioner outdoor unit according to claim 1, characterized in that, The outdoor unit of the air conditioner includes a partition (7). The electrical box (1) and the partition (7) together form a separator, which divides the inner cavity of the outdoor unit of the air conditioner into a first cavity (501) and a second cavity (502). The blower is arranged in the first cavity (501). The first air inlet (401) faces the second cavity (502), and the air outlet (6) faces the first cavity (501).

3. The outdoor air conditioner according to claim 2, wherein The electrical component includes a circuit board (2). A first flow path is formed between the circuit board (2) and the side wall of the electrical box (1), and the first flow path communicates the first air inlet (401) and the air outlet (6).

4. The air conditioner outdoor unit according to claim 3, characterized in that, A second air inlet (402) is further provided on the side wall of the electrical box (1). The first air inlet (401) is located at the bottom of the electrical box (1). The second air inlet (402) is located above the first air inlet (401) and faces the second cavity (502). The second air inlet (402) and the air outlet (6) are located on both sides of the circuit board (2). A second flow path is formed between the second air inlet (402) and the first air inlet (401).

5. The air conditioner outdoor unit according to claim 4, characterized in that, A plurality of through holes are provided on the circuit board (2).

6. The air conditioner outdoor unit according to claim 1, wherein, The first air inlet (401) is rectangular, and the width of the first air inlet (401) is not greater than 1 mm.

7. The air conditioner outdoor unit according to claim 4, characterized in that, The air outlet (6) is above the first air inlet (401) and is at least 100 mm higher than the first air inlet (401).

8. The air conditioner outdoor unit according to claim 3, wherein, The electrical box (1) includes a heat dissipation part (8). The heat dissipation part (8) includes a plurality of heat dissipation fins. When the first cavity (501) is provided, the plurality of heat dissipation fins are arranged in the first cavity (501), and the extending direction of the interval between adjacent two heat dissipation fins is consistent with the flowing direction of the air flow generated by the operation of the blower.

9. The air conditioner outdoor unit according to claim 8, characterized in that, The heat dissipation part (8) is in contact with the circuit board (2). A first heat generating component and a second heat generating component are provided on the circuit board (2). In unit time, the first heat generating component generates more heat than the second heat generating component. In the projection in the thickness direction of the circuit board (2), the heat dissipation part (8) at least partially coincides with the first heat generating component, and the second heat generating component at least partially coincides with the first flow path.

10. An air conditioner, characterized in that, An outdoor unit of an air conditioner according to any one of claims 1-9 is included.

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