Door plate structure for inverter and inverter cabinet

Abstract

The embodiment of the utility model provides a door plate structure for an inverter and an inverter cabinet, the door plate structure is connected to the inverter cabinet, the door plate structure comprises a connecting part and a noise reduction part, the connecting part is fixedly connected to the first end of the noise reduction part along the length direction, and the connecting part is used for being movably connected to the inverter cabinet; an outer hard plate layer, a sound insulation layer, a sound absorption layer and a perforated plate layer are sequentially stacked on the noise reduction part in the thickness direction of the noise reduction part so as to carry out sound insulation and noise reduction on an inverter located in the inverter cabinet. According to the door plate structure for the inverter disclosed by the embodiment of the invention, the connecting part and the noise reduction part are arranged, so that a noise reduction door plate with high reliability can be provided for the high-power inverter, the structure is simple, and the installation is convenient.

Description

Technical Field

[0001] The embodiments of the present disclosure belong to the technical field of inverter noise reduction, and particularly relate to a door panel structure for an inverter and an inverter cabinet. Background Art

[0002] At present, ordinary inverters are widely used in all walks of life, and high-power inverters are generally used in some specific occasions. Due to their complex structure and multiple noise sources, there are too few products with mature noise reduction design solutions. In some specific use environments, noise must be reduced. Therefore, as the "shortcoming" of sound insulation treatment, the design of door panels is particularly critical. Only by using cabinet door panels with high sound insulation can the actual effect of the entire sound insulation system be achieved. Utility Model Content

[0003] The embodiments of the present disclosure aim to solve at least one of the technical problems existing in the prior art, and provide a door panel structure for an inverter and an inverter cabinet.

[0004] In one aspect, an embodiment of the present disclosure provides a door panel structure for an inverter, wherein the door panel structure is connected to an inverter cabinet, and the door panel structure includes a connecting portion and a lowering portion.

[0005] Noise department:

[0006] The connecting portion is fixedly connected to a first end of the noise reduction portion along the length direction thereof, and the connecting portion is used for being movably connected to the inverter cabinet;

[0007] The noise reduction part is stacked with an outer hard board layer, a sound insulation layer, a sound absorption layer and a perforated board layer in sequence along the thickness direction thereof, so as to soundproof and reduce the noise of the inverter located in the inverter cabinet.

[0008] Optionally, the connecting portion includes a connecting sub-portion and a limiting protrusion sub-portion, and the sound absorbing layer is provided with a limiting groove at a first end along its length direction;

[0009] The limiting protrusion sub-portion is fixedly connected to the noise reduction portion through the limiting groove, and the connecting sub-portion is fixedly connected to a side of the limiting protrusion sub-portion away from the noise reduction portion.

[0010] Optionally, the door panel structure further includes an electromagnetic shielding strip, and the connecting sub-part is provided with a groove;

[0011] A portion of the electromagnetic shielding strip is disposed in the groove, and another portion of the electromagnetic shielding strip is located outside the groove, so that the connecting portion is sealed and connected to the inverter cabinet through the electromagnetic shielding strip.

[0012] Optionally, the perforated plate layer is screwed to the sound absorbing layer, and the perforated plate layer is provided with through holes arranged in an array and having an inner diameter of 10 mm to 11 mm.

[0013] Optionally, the noise reduction part further includes glass fiber cloth, which is coated on the sound absorbing layer and located between the sound absorbing layer and the perforated plate layer.

[0014] Optionally, the thickness of the connecting portion is the same as the thickness of the noise reduction portion.

[0015] Optionally, the outer hard plate layer is a steel outer hard plate layer; and / or;

[0016] The sound insulation layer is a damping sound insulation layer; and / or,

[0017] The sound absorbing layer is a fireproof sound absorbing cotton layer; and / or,

[0018] The perforated plate layer is a stainless steel perforated plate layer.

[0019] Optionally, the thickness of the outer hard plate layer ranges from 1.5 mm to 2.5 mm; and / or,

[0020] The thickness of the sound insulation layer is in the range of 1 mm to 2 mm; and / or,

[0021] The thickness of the sound absorbing layer is in the range of 7 mm to 8 mm; and / or,

[0022] The thickness of the perforated plate layer ranges from 0.5 mm to 1.5 mm.

[0023] Optionally, a conductive rubber sealing strip is circumferentially provided on one side of the door panel structure facing the inverter cabinet.

[0024] On the other hand, an embodiment of the present disclosure further provides an inverter cabinet, the inverter cabinet comprising a cabinet body and the door panel structure described above;

[0025] The door panel structure is movably connected to the cabinet to provide sound insulation and noise reduction for the inverter located in the cabinet.

[0026] A door panel structure and an inverter cabinet for an inverter according to an embodiment of the present disclosure can provide a high-reliability noise-reducing door panel for a high-power inverter through the provided connection part and the noise reduction part, and can strengthen the vibration isolation and sealing of the connection part of the inverter cabinet, thereby preventing the transmission of vibration from causing secondary excitation to generate noise and preventing the transmission of noise through gaps; and the structure is simple and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a cross-sectional view of a door panel structure for an inverter according to an embodiment of the present disclosure;

[0028] Figure 2This is a schematic diagram of a perforated plate layer of a door plate structure for an inverter according to another embodiment of the present disclosure. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0030] An inverter is a device that converts direct current into alternating current. It consists of an inverter main circuit, a controller, a heat dissipation system, etc. Among them, the inverter main circuit is mainly composed of a power switching unit, a DC / AC power conversion unit, and a transformer filter output unit. The inverter input is connected to the filter, and then the DC bus is powered by the conversion switch. The DC / AC unit of the latter stage converts the DC into AC, which is output to the three-phase AC load after being isolated by the transformer and filtered by the filter. Inverters are widely used in various electrical circuits because of their high conversion efficiency, fast startup, good safety performance, good physical properties, load adaptability and strong stability.

[0031] The main noise sources of high-power inverters are: AC output power frequency transformer, AC output power frequency filter reactor, cooling fan and air duct, cooling pipe, IGBT (insulated gate bipolar transistor). Excessive noise will cause sound pollution. In some specific use environments, strict requirements are placed on the vibration and noise indicators of the inverter cabinet.

[0032] In view of this, the inventor has designed a door panel structure 100 for an inverter, which is used in conjunction with an inverter cabinet to achieve sound insulation and noise reduction. Figure 1 As shown, the door panel structure 100 is connected to the inverter cabinet (not shown in the figure), and the door panel structure 100 includes a connecting portion 110 and a noise reduction portion 120. The connecting portion 110 is fixedly connected to the first end of the noise reduction portion 120 along its length direction, and the connecting portion 110 is used to be movably connected to the inverter cabinet. The noise reduction portion 120 is sequentially stacked with an outer hard plate layer 121, a sound insulation layer 122, a sound absorption layer 123 and a perforated plate layer 124 along its thickness direction to soundproof and reduce the noise of the inverter located in the inverter cabinet.

[0033] Specifically, Figure 1As shown, the door panel structure 100 is used in conjunction with the inverter cabinet. Among them, the connecting part 110 is used to be movably connected to the inverter cabinet, and the bottom of the connecting part 110 is fixed to the top of the noise reduction part 120. The noise reduction part 120 is provided with an outer hard board layer 121, a sound insulation layer 122, a sound absorption layer 123 and a perforated board layer 124 from left to right. The setting of the outer hard board layer 121 can ensure the structural strength, and the setting of the sound insulation layer 122 can weaken the vibration of the outer hard board layer 121 and improve the sound insulation effect. The sound absorption layer 123 is used to absorb the noise generated by the inverter in the inverter cabinet. The perforated board layer 124 is used as a surface material on the one hand, and as a Helmholtz resonance sound absorption structure on the other hand, to improve the sound absorption effect of the door panel structure 100.

[0034] The door panel structure for the inverter of the embodiment of the present disclosure can provide a high-reliability noise-reducing door panel for a high-power inverter through the provided connection part and the noise reduction part, and can strengthen the vibration isolation and sealing of the connection part of the inverter cabinet, so as to prevent the transmission of vibration from causing secondary excitation to generate noise, and prevent the transmission of noise through the gap. The inverter located in the inverter cabinet can be effectively soundproofed and noise-reduced, and the structure is simple and easy to install.

[0035] For example, Figure 1 As shown, the connecting portion 110 includes a connecting sub-portion 111 and a limiting protrusion sub-portion 112, and the sound absorbing layer 123 is provided with a limiting groove (not marked in the figure) at the first end along its length direction. The limiting protrusion sub-portion 112 is fixedly connected to the noise reduction portion 120 through the limiting groove, and the connecting sub-portion 111 is fixedly connected to the side of the limiting protrusion sub-portion 112 away from the noise reduction portion 120.

[0036] Specifically, Figure 1 As shown, one end of the limiting protrusion sub-portion 112 is fixedly connected to the noise reduction portion 120 through the limiting groove, and the other end of the limiting protrusion sub-portion 112 is fixedly connected to the connecting sub-portion 111. The connecting sub-portion 111 is connected to the inverter cabinet.

[0037] The door panel structure for the inverter in the embodiment of the present disclosure can stably fix the connecting sub-part and the limiting protrusion sub-part in the limiting groove of the noise reduction part through the provided connecting sub-part, limiting protrusion sub-part and limiting groove, thereby increasing its structural stability.

[0038] For example, Figure 1 As shown, the door panel structure 100 further includes an electromagnetic shielding strip 130, and the connecting sub-portion 111 is provided with a groove 112. A portion of the electromagnetic shielding strip 130 is disposed in the groove 112, and another portion of the electromagnetic shielding strip 130 is located outside the groove 112, so that the connecting portion 110 is sealed and connected to the inverter cabinet through the electromagnetic shielding strip 130.

[0039] Specifically, Figure 1 As shown, a portion of the electromagnetic shielding strip 130 is embedded in the groove 112 and connected to the connecting sub-portion 111 , and another portion of the electromagnetic shielding strip 130 is located outside the groove 112 , so that the connecting portion 110 is sealed and connected to the inverter cabinet through the electromagnetic shielding strip 130 .

[0040] It should be noted that, as a specific example, Figure 1 As shown, the thickness of the connecting portion 110 is the same as the thickness of the noise reduction portion 120. That is, the thickness of the connecting portion 110 from left to right is set to be the same as the thickness of the noise reduction portion 120 from left to right. Of course, the thickness of the connecting portion 110 and the thickness of the noise reduction portion 120 can also be set to be different, and the embodiments of the present disclosure do not specifically limit this.

[0041] The door panel structure for the inverter in the embodiment of the present disclosure can make the connection part sealed and connected to the inverter cabinet through the provided electromagnetic shielding strips and grooves, so as to perform electromagnetic shielding on the inverter located in the inverter cabinet.

[0042] For example, Figure 1 and Figure 2 As shown, the perforated plate layer 124 is screwed to the sound absorbing layer 123 , and the perforated plate layer 124 is provided with through holes 1241 arranged in an array and with an inner diameter of 10 mm to 11 mm.

[0043] Specifically, Figure 2 As shown, a plurality of honeycomb through holes 1241 arranged in an array and having an inner diameter of 10 mm to 11 mm are provided on the perforated plate layer 124. As a specific example, the inner diameter of each through hole 1241 is set to 10.4 mm.

[0044] The door panel structure for the inverter in the embodiment of the present disclosure can further improve the sound absorption effect of the perforated plate layer by means of the specific through holes provided in the perforated plate layer.

[0045] For example, Figure 1 As shown, the noise reduction part 120 further includes a glass fiber cloth 125, which is coated on the sound absorbing layer 123 and is located between the sound absorbing layer 123 and the perforated plate layer 124. The glass fiber cloth can wrap the sound absorbing layer to prevent it from leaking out, and can also protect the perforated plate layer, so that a spacing barrier is formed between the limiting protrusion sub-part and the sound absorbing layer and the perforated plate layer.

[0046] For example, Figure 1As shown, a conductive rubber sealing strip (not shown in the figure) is provided along the circumferential direction on one side of the door panel structure 100 facing the inverter cabinet. Through the provided conductive sealing strip, the connection between the door panel structure and the door panel structure, and the connection between the door panel structure and the frame of the inverter cabinet can be compressed by the conductive sealing strip, thereby ensuring the sound insulation and sealing performance.

[0047] For example, Figure 1 As shown, the outer hard plate layer 121 can be set as a steel outer hard plate layer. The sound insulation layer 122 can be set as a damping sound insulation layer. The sound absorption layer 123 can be set as a fireproof sound absorption cotton layer. The perforated plate layer 124 can be set as a stainless steel perforated plate layer. Through the specific setting of the steel outer hard plate layer, the damping sound insulation layer, the fireproof sound absorption cotton layer and the stainless steel perforated plate layer, the vibration isolation and sealing of the inverter cabinet connection parts can be further strengthened, further preventing the transmission of vibration from causing secondary excitation to generate noise, and preventing the transmission of noise through the gap.

[0048] Exemplarily, the thickness of the outer hard plate layer 121 ranges from 1.5 mm to 2.5 mm. As a specific example, the thickness of the outer hard plate layer 121 is set to 2 mm. The thickness of the sound insulation layer 122 ranges from 1 mm to 2 mm. As a specific example, the thickness of the sound insulation layer 122 is set to 1.5 mm. The thickness of the sound absorption layer 123 ranges from 7 mm to 8 mm. As a specific example, the thickness of the sound absorption layer 123 is set to 7.5 mm. The thickness of the perforated plate layer 124 ranges from 0.5 mm to 1.5 mm. As a specific example, the thickness of the perforated plate layer 124 is set to 1 mm.

[0049] The door panel structure for the inverter in the embodiment of the present disclosure can further improve the sound insulation performance of the door panel structure through the specific thickness of the outer hard board layer, the sound insulation layer, the sound absorption layer and the perforated board layer, and is convenient for use with the inverter cabinet.

[0050] On the other hand, an embodiment of the present disclosure provides an inverter cabinet, the inverter cabinet comprising a cabinet body and the door panel structure described above, the specific structure of the door panel structure can refer to the relevant records in the above text, and will not be described in detail here. The door panel structure is movably connected to the cabinet body to soundproof and reduce noise of the inverter located in the cabinet body.

[0051] The inverter cabinet of the embodiment of the present disclosure can strengthen the vibration isolation and sealing of the inverter cabinet connection parts through the cooperation of the cabinet body and the door panel structure, so as to prevent the transmission of vibration from causing secondary excitation and generating noise, and prevent the transmission of noise through the gap. The inverter located in the inverter cabinet can be effectively soundproofed and noise reduced, and the structure is simple and easy to install.

[0052] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present disclosure, but the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and substance of the present disclosure, and these modifications and improvements are also considered to be within the scope of protection of the present disclosure.

Claims

1. A door panel structure for an inverter, wherein the door panel structure is connected to an inverter cabinet, characterized in that: The door panel structure includes a connecting portion and a noise reduction portion: The connecting portion is fixedly connected to a first end of the noise reduction portion along the length direction thereof, and the connecting portion is used for being movably connected to the inverter cabinet; The noise reduction part is stacked with an outer hard board layer, a sound insulation layer, a sound absorption layer and a perforated board layer in sequence along the thickness direction thereof, so as to soundproof and reduce the noise of the inverter located in the inverter cabinet.

2. The door panel structure according to claim 1, characterized in that: The connecting portion includes a connecting sub-portion and a limiting protrusion sub-portion, and the sound absorbing layer is provided with a limiting groove at a first end along its length direction; The limiting protrusion sub-portion is fixedly connected to the noise reduction portion through the limiting groove, and the connecting sub-portion is fixedly connected to a side of the limiting protrusion sub-portion away from the noise reduction portion.

3. The door panel structure according to claim 2, characterized in that: The door panel structure further comprises an electromagnetic shielding strip, and the connecting sub-part is provided with a groove; A portion of the electromagnetic shielding strip is disposed in the groove, and another portion of the electromagnetic shielding strip is located outside the groove, so that the connecting portion is sealed and connected to the inverter cabinet through the electromagnetic shielding strip.

4. The door panel structure according to any one of claims 1 to 3, characterized in that: The perforated plate layer screws are installed on the sound absorbing layer, and the perforated plate layer is provided with through holes arranged in an array and having an inner diameter of 10 mm to 11 mm.

5. The door panel structure according to any one of claims 1 to 3, characterized in that: The noise reduction part further comprises a glass fiber cloth, and the glass fiber cloth is coated on the sound absorbing layer and is located between the sound absorbing layer and the perforated plate layer.

6. The door panel structure according to any one of claims 1 to 3, characterized in that: The thickness of the connecting portion is the same as the thickness of the noise reduction portion.

7. The door panel structure according to any one of claims 1 to 3, characterized in that: The outer hard plate layer is a steel outer hard plate layer; and / or; The sound insulation layer is a damping sound insulation layer; and / or, The sound absorbing layer is a fireproof sound absorbing cotton layer; and / or, The perforated plate layer is a stainless steel perforated plate layer.

8. The door panel structure according to any one of claims 1 to 3, characterized in that: The thickness of the outer hard plate layer ranges from 1.5 mm to 2.5 mm; and / or, The thickness of the sound insulation layer is in the range of 1 mm to 2 mm; and / or, The thickness of the sound absorbing layer is in the range of 7 mm to 8 mm; and / or, The thickness of the perforated plate layer ranges from 0.5 mm to 1.5 mm.

9. The door panel structure according to any one of claims 1 to 3, characterized in that: A conductive rubber sealing strip is circumferentially arranged on one side of the door panel structure facing the inverter cabinet.

10. An inverter cabinet, characterized in that: The inverter cabinet comprises a cabinet body and a door panel structure according to any one of claims 1 to 9; The door panel structure is movably connected to the cabinet to provide sound insulation and noise reduction for the inverter located in the cabinet.

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