Electrical equipment noise reduction device and inverter

Abstract

The utility model relates to the technical field of electrical equipment heat dissipation, and discloses an electrical equipment noise reduction device and an inverter, the noise reduction device comprises an air duct plate, a fixing frame and a fan, the interior of the air duct plate is a cavity, the air duct plate is suitable for being installed on the outer wall of one side, provided with a radiator, of a box body, the air duct plate is provided with an air inlet and an air outlet, and the fixing frame is installed in the air duct plate. An air inlet channel is formed between the fixing frame and the air channel plate and communicated with the air inlet, an air outlet channel is formed between the fixing frame and the radiator and communicated with the air outlet, the fan is fixedly installed on the fixing frame and suitable for conveying air from the air inlet channel to the air outlet channel, and the fan and the air inlet are arranged in a staggered mode in the height direction. According to the utility model, the air inlet and the fan are staggered, so that the noise of the fan can be prevented from being transmitted out by directly aligning to the air inlet, the noise generated in the operation process of the fan is reduced, and the use experience of a user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation of electrical equipment, in particular to a noise reduction device and an inverter for electrical equipment. Background Art

[0002] With the continuous development of the new energy industry, the power of electrical equipment is getting bigger and bigger. In order to better dissipate heat from the equipment, more and more fans are installed in the equipment. At the same time, the running noise of the equipment is getting louder and louder. Noise reduction has become a difficulty for the equipment.

[0003] Take the inverter as an example. The inverter is a device that converts direct current into alternating current. It is widely used in new energy industries such as photovoltaic power generation and wind power generation. During continuous use, the inductor and other devices installed in the inverter will generate heat, which will have an adverse effect on the normal use of the inverter. Therefore, a fan is usually installed in the inverter to dissipate heat from the inverter.

[0004] In the prior art, a fan guard is usually provided at the air inlet on the inverter box. The sound produced by the vibration of the round edge of the fan guard when the airflow passes through is lower than the sound produced by the vibration of the edge of the sheet metal opening. Since the fan generates broadband noise when it is running, it brings a bad user experience. Utility Model Content

[0005] In view of this, the utility model provides an electrical equipment noise reduction device and an inverter to solve the problem in the prior art that the inverter fan generates noise, thereby bringing a bad user experience.

[0006] In the first aspect, the utility model provides a noise reduction device for electrical equipment, including an air duct plate, a fixing frame and a fan. The interior of the air duct plate is a cavity. The air duct plate is suitable for being installed on the outer wall of a box body on one side of which a radiator is arranged. The air duct plate is provided with an air inlet and an air outlet. The fixing frame is installed inside the air duct plate. An air inlet channel is formed between the fixing frame and the air duct plate, and the air inlet channel is connected to the air inlet. An air outlet channel is formed between the fixing frame and the radiator, and the air outlet channel is connected to the air outlet. The fan is fixedly installed on the fixing frame. The fan is suitable for transporting air from the air inlet channel to the air outlet channel. The fan and the air inlet are staggered in height.

[0007] Beneficial effect: When the utility model installs the air duct plate on the box body, an air inlet channel is formed between the fixing frame and the air duct plate, and an air outlet channel is formed between the fixing frame and the radiator. The fan can input air into the air inlet channel from the air inlet, and output air from the air outlet channel to the air outlet. During the air flow, the heat in the radiator can be taken away, thereby reducing the temperature of the radiator. Since the fan and the air inlet are staggered in height, the air inlet and the fan are misaligned, which can prevent the fan noise from being directly transmitted to the air inlet, thereby reducing the noise generated by the fan during operation and improving the user experience.

[0008] In an optional embodiment, an air guide portion is provided on the fixing frame, the air guide portion is fixedly connected to the air inlet, and an air inlet channel is formed between the air guide portion and the air duct plate.

[0009] Beneficial effect: The utility model fixedly connects the air guide part with the air inlet and covers the air inlet. On the one hand, it can make the external air enter the air inlet channel smoothly, and on the other hand, it can prevent the backflow of air into the air duct plate, thereby ensuring the direction of airflow from the air inlet to the air outlet.

[0010] In an optional implementation, the distance between the air duct plate and the air guide portion is not less than 20 mm.

[0011] Beneficial effect: The utility model sets the distance between the air duct plate and the air guide portion to be no less than 20 mm, which can ensure that there is sufficient air intake in the air inlet channel.

[0012] In an optional implementation, the electrical equipment noise reduction device further includes a sound absorbing member, and the sound absorbing member is disposed on a side of the fixing frame facing the air duct plate.

[0013] Beneficial effect: The utility model arranges a sound absorbing member on the side of the fixing frame facing the air duct plate, so that the noise generated by the fan can be reflected on the inner wall of the air inlet channel and absorbed by the sound absorbing member, thereby reducing the noise output to the external environment.

[0014] In the second aspect, the utility model also provides an inverter, including the above-mentioned electrical equipment noise reduction device, a box radiator and a heating element, the radiator is arranged on the side wall of the box, the heating element is fixedly installed on the box, and the heating element is located on the air outlet channel.

[0015] Beneficial effect: The utility model arranges the radiator and the heating element on the air outlet channel. When the air flows from the air inlet to the air outlet, the heat in the radiator and the heating element can be output to the external environment, thereby reducing the temperature in the inverter. Since the fan and the air inlet are staggered in height, a misalignment is formed between the air inlet and the fan, which can avoid the fan noise from being directly transmitted to the air inlet, thereby reducing the noise generated by the fan during operation and improving the user experience.

[0016] In an optional embodiment, the air outlet includes a first air outlet and a second air outlet, the first air outlet is arranged at the top of the box, and the second air outlet is arranged at the bottom of the box, and the air inlet includes a first air inlet and a second air inlet, the first air inlet is connected to the first air outlet, and the second air inlet is connected to the second air outlet.

[0017] Beneficial effect: The utility model can form two cooling air ducts in the air duct plate by arranging the first air inlet, the second air inlet, the first air outlet and the second air outlet, so as to realize the heat dissipation of the heat generating components in different parts, thereby improving the heat dissipation efficiency.

[0018] In an optional embodiment, the heating element includes a first heating element and a second heating element, the first heating element is close to the first air outlet, and the second heating element is close to the second air outlet.

[0019] In an optional embodiment, the heat-generating element is provided with heat-dissipating fins, and an air duct is formed between adjacent heat-dissipating fins, and the air duct is arranged on the air outlet passage.

[0020] Beneficial effect: The utility model improves the heat dissipation effect of the heating element by forming an air duct between adjacent heat dissipation fins and arranging the air duct on the air outlet channel.

[0021] In an optional embodiment, a groove is provided on the heat sink, and the groove is suitable for placing a fan.

[0022] In an optional implementation, a mounting portion is provided on the fixing frame, the fan is fixedly mounted on the mounting portion, and the mounting portion matches the groove.

[0023] Beneficial effect: The utility model installs the fan on the installation part located in the groove, which can reduce the installation space occupied by the fan. At the same time, the side of the fixing frame close to the air duct plate forms an air inlet channel, and the side of the fixing frame close to the radiator forms an air outlet channel, thereby realizing the output of heat on the radiator to the external environment and reducing the temperature of the inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 An exploded diagram of an inverter according to an embodiment of the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of an inverter according to an embodiment of the utility model;

[0027] Figure 3 A side view of a noise reduction device for electrical equipment according to an embodiment of the utility model;

[0028] Figure 4 This is an airflow direction diagram of an electrical equipment noise reduction device according to an embodiment of the utility model.

[0029] Description of reference numerals:

[0030] 1. Air duct plate;

[0031] 2. Air inlet; 201. First air inlet; 202. Second air inlet;

[0032] 3. Air outlet; 301. First air outlet; 302. Second air outlet;

[0033] 4. fixing frame; 401. air guide portion; 402. mounting portion;

[0034] 5. Fan;

[0035] 6. Sound-absorbing parts;

[0036] 7. Box body;

[0037] 8. Radiator;

[0038] 9. Heat generating element; 901. first heat generating element; 902. second heat generating element. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0040] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.

[0041] According to an embodiment of the present utility model, on the one hand, as Figures 1 to 4As shown, a noise reduction device for electrical equipment is provided, including an air duct plate 1, a fixing frame 4 and a fan 5. The interior of the air duct plate 1 is a cavity. The air duct plate 1 is suitable for being installed on the outer wall of a box body 7 on one side of which a radiator 8 is arranged. An air inlet 2 and an air outlet 3 are provided on the air duct plate 1. The fixing frame 4 is installed inside the air duct plate 1. An air inlet channel is formed between the fixing frame 4 and the air duct plate 1. The air inlet channel is connected to the air inlet 2. An air outlet channel is formed between the fixing frame 4 and the radiator 8. The air outlet channel is connected to the air outlet 3. The fan 5 is fixedly installed on the fixing frame 4. The fan 5 is suitable for conveying air from the air inlet channel to the air outlet channel. The fan 5 and the air inlet 2 are staggered in height.

[0042] Specifically, in this embodiment, the air duct plate 1 is in the shape of a rectangular shell, and its size is not larger than that of the inverter box 7. The air duct plate 1 is covered on one side of the box 7 where the radiator 8 is provided. The air inlet 2 and the air outlet 3 are respectively provided on two adjacent side surfaces of the air duct plate 1.

[0043] In this embodiment, the fixing frame 4 is fixedly installed in the cavity inside the air duct plate 1, and a fan 5 is installed on the fixing frame 4. The fan 5 is not arranged directly opposite the air inlet 2. When the fan 5 is working, air enters the air inlet channel from the air inlet 2 from the external environment, and the fan 5 then passes the air through the air outlet channel through the radiator 8 and is output from the air outlet 3.

[0044] The utility model forms an air inlet channel between the fixing frame 4 and the air duct plate 1, and an air outlet channel between the fixing frame 4 and the radiator 8 when the air duct plate 1 is installed on the box body 7. The fan 5 can input air into the air inlet channel from the air inlet 2, and output air from the air outlet channel to the air outlet 3. During the air flow, the heat in the radiator 8 can be taken away, thereby reducing the temperature of the radiator 8. Since the fan 5 and the air inlet 2 are staggered in height, the air inlet 2 and the fan 5 are misaligned, which can prevent the noise of the fan 5 from being directly directed to the air inlet 2, thereby reducing the noise generated by the fan 5 during operation and improving the user experience.

[0045] In one embodiment, Figure 1 and Figure 3 As shown, the air guide portion 401 is fixedly connected to the air inlet 2 , and an air inlet channel is formed between the air guide portion 401 and the air duct plate 1 .

[0046] Specifically, in this embodiment, an air inlet channel is formed between the air duct plate 1 and the side of the air guide portion 401 facing the air duct plate 1, and an air outlet channel is formed between the air guide portion 401 and the side of the box body 7 facing the box body 7. In this embodiment, the air guide portion 401 is cavity-shaped on the side of the air duct plate 1, and the air guide portion 401 is covered and fixedly installed on the air inlet 2.

[0047] The utility model fixes the air guide part 401 to the air inlet 2 and covers the air inlet 2, which can allow external air to enter the air inlet channel smoothly on the one hand, and prevent the air from entering the air duct plate 1 and causing backflow on the other hand, thereby ensuring that the airflow direction flows from the air inlet 2 to the air outlet 3.

[0048] In one embodiment, the distance between the air duct plate 1 and the air guiding portion 401 is not less than 20 mm.

[0049] In the present invention, the distance between the air duct plate 1 and the air guide portion 401 is set to be no less than 20 mm, which can ensure that there is enough air intake in the air intake channel.

[0050] In one embodiment, Figure 1 and Figure 3 As shown, the electrical equipment noise reduction device further includes a sound absorbing member 6 , which is arranged on a side of the fixing frame 4 facing the air duct plate 1 .

[0051] Specifically, in this embodiment, the sound-absorbing element 6 can be made of porous materials such as sound-absorbing cotton, sound-absorbing blankets, and sound-absorbing panels. Its sound absorption mechanism is that sound waves penetrate into the pores of the material, and the pores are mostly open holes that penetrate each other internally. They are subjected to friction and viscous resistance of air molecules, and small fibers are mechanically vibrated, thereby converting sound energy into heat energy to achieve noise absorption.

[0052] The utility model provides a sound absorbing member 6 on the side of the fixing frame 4 facing the air duct plate 1, so that the noise generated by the fan 5 is reflected on the inner wall of the air inlet channel and absorbed by the sound absorbing member 6, thereby reducing the noise output to the external environment.

[0053] According to an embodiment of the present utility model, on the other hand, Figures 1 to 4 As shown, an inverter is also provided, including the above-mentioned electrical equipment noise reduction device, a box body 7, a radiator 8 and a heating element 9, the radiator 8 is arranged on the side wall of the box body 7, the heating element 9 is fixedly installed on the box body 7, and the heating element 9 is located on the air outlet channel.

[0054] Specifically, in this embodiment, a power device is arranged in the box 7, and the power device generates heat when working. The radiator 8 is arranged on the side wall of the box 7, and is used to dissipate heat from the power device in the box 7; a heating element 9 is also arranged on the box 7, and a heat dissipation fin is arranged on the heating element 9. The heating element 9 is adjacent to the radiator 8, and the heating element 9 is also arranged on the air outlet channel. In this embodiment, the heating element 9 is a reactance.

[0055] The utility model arranges the radiator 8 and the heating element 9 on the air outlet channel. When the air flows from the air inlet 2 to the air outlet 3, the heat in the radiator 8 and the heating element 9 can be output to the external environment, thereby reducing the temperature in the inverter. Since the fan 5 and the air inlet 2 are staggered in height, the air inlet 2 and the fan 5 are misaligned, which can prevent the noise of the fan 5 from being directly directed to the air inlet 2, thereby reducing the noise generated by the fan 5 during operation and improving the user experience.

[0056] In one embodiment, Figures 1 to 4 As shown, the air outlet 3 includes a first air outlet 301 and a second air outlet 302, the first air outlet 301 is arranged at the top of the box body 7, and the second air outlet 302 is arranged at the bottom of the box body 7, and the air inlet 2 includes a first air inlet 201 and a second air inlet 202, the first air inlet 201 is connected to the first air outlet 301, and the second air inlet 202 is connected to the second air outlet 302.

[0057] The utility model can form two cooling air ducts in the air duct plate 1 by setting the first air inlet 201, the second air inlet 202, the first air outlet 301 and the second air outlet 302, so as to realize heat dissipation for power devices and heating elements 9 in different parts, thereby improving the heat dissipation efficiency.

[0058] In one embodiment, Figure 1 and Figure 3 As shown, the heating element 9 includes a first heating element 901 and a second heating element 902 . The first heating element 901 is close to the first air outlet 301 , and the second heating element 902 is close to the second air outlet 302 .

[0059] Specifically, in this embodiment, there are two heating elements 9. The first heating element 901 is arranged above the box body 7 near the first air outlet 301, and the second heating element 902 is arranged below the box body 7 near the second air outlet 302. A plurality of heat dissipating fins are provided on the heating element 9. The heating element 9 is located in the air outlet channel. When the air flow passes through the air outlet channel, the heat dissipated by the heating element 9 can be output from the air outlet 3, thereby reducing the temperature of the heating element 9.

[0060] In one embodiment, Figure 1 As shown, the heat-generating element 9 is provided with heat-dissipating fins, and air ducts are formed between adjacent heat-dissipating fins, and the air ducts are arranged on the air outlet passage.

[0061] Specifically, in this embodiment, the heating element 9 is provided with multiple vertical heat dissipation fins, which are arranged in parallel. Air ducts are formed between adjacent heat dissipation fins. The heat in the heating element 9 can be output to the air duct through the heat dissipation fins. The air duct is set on the air outlet channel in the same direction as the outflow of the air flow.

[0062] The utility model improves the heat dissipation effect of the heating element 9 by forming an air duct between adjacent heat dissipation fins and arranging the air duct on the air outlet channel.

[0063] In one embodiment, Figure 1 and Figure 3 As shown, a groove is provided on the heat sink 8, and the groove is suitable for placing the fan 5.

[0064] Specifically, in this embodiment, the radiator 8 is arranged in the middle position of the side of the box body 7. The radiator 8 can be an integrated structure with a groove in the middle, or two radiators 8 can be installed at intervals to reserve a groove for placing the fan 5 installed on the fixing frame 4.

[0065] In one embodiment, Figure 1 and Figure 3 As shown, the fixing frame 4 is provided with a mounting portion 402 , and the fan 5 is fixedly mounted on the mounting portion 402 , and the mounting portion 402 matches the groove.

[0066] Specifically, in this embodiment, the fixing frame 4 has a "J"-shaped structure, the mounting portion 402 is located at a protruding portion on the fixing frame 4, the air guide portion 401 is located on both sides of the mounting portion 402 on the fixing frame 4, and the mounting portion 402 connects the air inlet channel and the air outlet channel. When the fan 5 is installed on the mounting portion 402, the fan 5 can transport external air from the air inlet 2 along the air inlet channel to the air outlet channel, and the low-temperature air is output from the air outlet 3 after heat exchange with the radiator 8 and the heating element 9.

[0067] The utility model installs the fan 5 on the installation portion 402 located in the groove, which can reduce the installation space occupied by the fan 5. At the same time, the side of the fixing frame 4 close to the air duct plate 1 forms an air inlet channel, and the side of the fixing frame 4 close to the radiator 8 forms an air outlet channel, thereby outputting the heat on the radiator 8 to the external environment and reducing the temperature of the inverter.

[0068] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A noise reduction device for electrical equipment, characterized in that: include: An air duct plate (1), the interior of the air duct plate (1) is a cavity, the air duct plate (1) is suitable for being installed on the outer wall of a box (7) on which a radiator (8) is arranged, and the air duct plate (1) is provided with an air inlet (2) and an air outlet (3); A fixing frame (4), the fixing frame (4) being installed inside the air duct plate (1), an air inlet channel being formed between the fixing frame (4) and the air duct plate (1), the air inlet channel being connected to the air inlet (2), an air outlet channel being formed between the fixing frame (4) and the radiator (8), the air outlet channel being connected to the air outlet (3); A fan (5), wherein the fan (5) is fixedly mounted on the fixing frame (4), and the fan (5) is suitable for conveying air from the air inlet channel to the air outlet channel, and the fan (5) and the air inlet (2) are arranged in a staggered manner in height.

2. The electrical equipment noise reduction device according to claim 1, characterized in that: The fixing frame (4) is provided with an air guide portion (401), the air guide portion (401) is fixedly connected to the air inlet (2), and the air inlet channel is formed between the air guide portion (401) and the air duct plate (1).

3. The electrical equipment noise reduction device according to claim 2, characterized in that: The distance between the air duct plate (1) and the air guide portion (401) is not less than 20 mm.

4. The electrical equipment noise reduction device according to claim 1, characterized in that: Also includes: A sound absorbing member (6), wherein the sound absorbing member (6) is arranged on a side of the fixing frame (4) facing the air duct plate (1).

5. An inverter, characterized in that: include: The electrical equipment noise reduction device according to any one of claims 1 to 4; Box body (7); A radiator (8), wherein the radiator (8) is arranged on a side wall of the box body (7); A heating element (9), the heating element (9) is fixedly mounted on the box body (7), and the heating element (9) is located on the air outlet channel.

6. The inverter according to claim 5, characterized in that: The air outlet (3) comprises a first air outlet (301) and a second air outlet (302), wherein the first air outlet (301) is arranged at the top of the box body (7), and the second air outlet (302) is arranged at the bottom of the box body (7); the air inlet (2) comprises a first air inlet (201) and a second air inlet (202), wherein the first air inlet (201) is connected to the first air outlet (301), and the second air inlet (202) is connected to the second air outlet (302).

7. The inverter according to claim 6, characterized in that: The heating element (9) comprises a first heating element (901) and a second heating element (902), wherein the first heating element (901) is close to the first air outlet (301), and the second heating element (902) is close to the second air outlet (302).

8. The inverter according to any one of claims 5 to 7, characterized in that: The heating element (9) is provided with heat dissipation fins, and an air duct is formed between adjacent heat dissipation fins, and the air duct is arranged on the air outlet channel.

9. The inverter according to claim 5, characterized in that: The heat sink (8) is provided with a groove, and the groove is suitable for accommodating the fan (5).

10. The inverter according to claim 9, characterized in that: The fixing frame (4) is provided with a mounting portion (402), the fan (5) is fixedly mounted on the mounting portion (402), and the mounting portion (402) matches the groove.

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