Regular blowback system for heat dissipation filter screen of frequency converter

Abstract

The utility model discloses a regular blowback system for a frequency converter heat dissipation filter screen, which relates to the technical field of frequency converter heat dissipation and comprises an outer filter screen, two groups of reverse air blowing structures are mounted on the back of the outer filter screen and connected through a main air pipe, and an air source structure is mounted at the tail of the main air pipe. A filter cotton structure is mounted on the back of the outer filter screen; the two groups of reverse air-blowing structures comprise two air-blowing seats, air-blowing pipes and a plurality of air-blowing nozzles; the two air blowing seats are respectively mounted on the back surface of the outer filter screen; according to the utility model, the heat dissipation filter screen which needs to be cleaned manually is replaced by regularly cleaning the filter screen by a machine, so that the heat dissipation filter screen of the frequency converter can be kept in a clean and good ventilation state for a long time, and the phenomenon that heat in the frequency converter cannot be dissipated due to poor ventilation of the filter screen can be avoided; therefore, the high-voltage frequency converter gives a high-temperature alarm fault and even the frequency converter jumps and stops.

Description

Technical Field

[0001] The utility model relates to the technical field of frequency converter heat dissipation, in particular to a regular back-blowing system for a heat dissipation filter screen of a frequency converter. Background Technique

[0002] A frequency converter is a power control device that applies frequency conversion technology and microelectronics technology to control an AC motor by changing the working power frequency of the motor. The frequency converter mainly consists of a rectifier (AC to DC), a filter, an inverter (DC to AC), a braking unit, a drive unit, a detection unit, a microprocessing unit, etc. The frequency converter adjusts the voltage and frequency of the output power supply by the on-off of the internal IGBT, provides the required power supply voltage according to the actual needs of the motor, and thus achieves the purpose of energy saving and speed regulation. In addition, the frequency converter also has many protection functions, such as overcurrent, overvoltage, overload protection, etc.

[0003] The operation of the frequency converter requires active heat dissipation. Especially for high-voltage frequency converters, not only active heat dissipation is required, but also in order to ensure the stability of the operation, the air inlet for active heat dissipation needs to be filtered. However, the heat dissipation filter screen is just a simple filter screen with a layer of filter cotton inside. After a long time, the filter cotton will be blocked by dust, and workers need to regularly remove it and blow the dust with a hair dryer. This completely depends on workers, and the disadvantages are obvious. Some on-site workers clean it only once in a long time, or never clean the filter screen at all. Until the frequency converter has a problem, if it is caused by heat dissipation problems, it will only attract attention, but it is too late. Content of the Utility Model

[0004] The purpose of the utility model is to solve the disadvantages existing in the prior art, and a regular back-blowing system for a heat dissipation filter screen of a frequency converter is proposed.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A regular back-blowing system for a heat dissipation filter screen of a frequency converter, comprising: an outer filter screen, two reverse air-blowing structures are installed on the back of the outer filter screen, the two reverse air-blowing structures are connected by a main air pipe, a gas source structure is installed at the tail of the main air pipe, and a filter cotton structure is installed on the back of the outer filter screen; the two reverse air-blowing structures include: two air-blowing seats, an air-blowing pipe and a plurality of air-blowing nozzles; the two air-blowing seats are respectively installed on the back of the outer filter screen, the air-blowing pipe is installed on the back of the two air-blowing seats, and the plurality of air-blowing nozzles are respectively installed on the front of the air-blowing pipe.

[0007] The present utility model is further configured such that the air source structure includes: an air source hose, an electromagnetic valve, and an air compressor; one end of the air source hose is installed on the back of the main air pipe, the electromagnetic valve is installed outside the air source hose, and the air outlet of the air compressor is connected to the other end of the air source hose.

[0008] The present utility model is further configured such that the filter cotton structure includes: a filter cotton fixing frame and a fine-pore filter cotton; the fine-pore filter cotton is fixed to the back of the outer filter net through the filter cotton fixing frame, and the filter cotton fixing frame is fixed to the back of the outer filter net by four bolts.

[0009] The present utility model is further configured such that the outer filter net is provided with a plurality of filter holes having relatively large apertures.

[0010] The present utility model is further configured such that a fixing frame is provided outside the air compressor.

[0011] The present utility model is further configured such that the electromagnetic valve can be controlled by a time relay.

[0012] The beneficial effects of the present utility model are as follows: The present utility model changes the heat dissipation filter net that needs to be manually cleaned to using a machine to regularly clean the filter net. In this way, the heat dissipation filter net of the frequency converter can be kept clean and well-ventilated for a long time, and it can avoid the high-temperature alarm fault caused by the heat inside the frequency converter not being dissipated due to poor ventilation of the filter net, and even the frequency converter tripping.

[0013] 1. For the regular reverse blowing system of the heat dissipation filter net of the frequency converter, by providing an air source structure and a reverse air blowing structure, the air source structure can provide high-pressure air flow for the reverse air blowing structure, and the reverse air blowing structure can clean the outer filter net and the filter cotton structure, ensuring the cleanliness of the filter structure.

[0014] 2. For the regular reverse blowing system of the heat dissipation filter net of the frequency converter, by providing a filter cotton structure, the filter cotton structure can filter relatively fine impurities in the air, ensuring the stable and safe operation of the frequency converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 FIG. 1 is a schematic diagram of the first overall structure of the regular reverse blowing system of the heat dissipation filter net of the frequency converter proposed by the present utility model;

[0016] Figure 2 FIG. 2 is a schematic diagram of the second overall structure of the regular reverse blowing system of the heat dissipation filter net of the frequency converter proposed by the present utility model;

[0017] Figure 3 FIG. 3 is a schematic diagram of the partial structure of the regular reverse blowing system of the heat dissipation filter net of the frequency converter proposed by the present utility model;

[0018] Figure 4 This is a partial structural explosion diagram of the regular reverse blowing system for the heat dissipation filter net of the frequency converter proposed by the present utility model.

[0019] In the figure: 1. Outer filter net; 2. Air blowing seat; 3. Air blowing pipe; 4. Air blowing nozzle; 5. Air source hose; 6. Electromagnetic valve; 7. Air compressor; 8. Filter cotton fixing rack; 9. Fine pore filter cotton; 10. Fixing rack. Specific embodiments

[0020] The technical solutions of this patent will be further described in detail below in combination with specific embodiments.

[0021] The embodiments of this patent will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain this patent and should not be construed as a limitation of this patent.

[0022] In the description of this patent, it should be understood that the orientation or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing this patent 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, and therefore should not be construed as a limitation of this patent.

[0023] In the description of this patent, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", "connection", "setting" should be understood in a broad sense. For example, it can be fixedly connected and set, or detachably connected and set, or integrally connected and set. For those of ordinary skill in the art, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0024] Refer to Figures 1-4, Inverter heat dissipation filter screen regular reverse blowing system, including: outer filter screen 1, two groups of reverse air blowing structures are installed on the back of the outer filter screen 1, the two groups of reverse air blowing structures are connected by a main air pipe, a gas source structure is installed at the tail of the main air pipe, and a filter cotton structure is installed on the back of the outer filter screen 1; the two groups of reverse air blowing structures include: two air blowing seats 2, air blowing pipes 3 and a number of air blowing nozzles 4; the two air blowing seats 2 are respectively installed on the back of the outer filter screen 1, the air blowing pipes 3 are installed on the back of the two air blowing seats 2, and a number of air blowing nozzles 4 are respectively installed on the front of the air blowing pipes 3, the gas source structure includes: a gas source hose 5, an electromagnetic valve 6 and an air compressor 7; one end of the gas source hose 5 is installed on the back of the main air pipe, the electromagnetic valve 6 is installed outside the gas source hose 5, and the air outlet of the air compressor 7 is connected to the other end of the gas source hose 5, the outer filter screen 1 is provided with a number of filter holes with larger apertures, a fixing frame 10 is provided outside the air compressor 7, the electromagnetic valve 6 can be controlled by a time relay, the gas source structure can provide high-pressure air flow for the reverse air blowing structure, and the reverse air blowing structure can clean the outer filter screen 1 and the filter cotton structure, and the cleanliness of the filter structure of Baocheng.

[0025] Specifically, the filter cotton structure includes: a filter cotton fixing frame 8 and a fine hole filter cotton 9; the fine hole filter cotton 9 is fixed to the back of the outer filter screen 1 through the filter cotton fixing frame 8, and the filter cotton fixing frame 8 is fixed to the back of the outer filter screen 1 by four bolts. The filter cotton structure can filter relatively fine impurities in the air and ensure the stable and safe operation of the inverter.

[0026] Working principle: The utility model cannot be used alone and needs to be used in cooperation with the existing high-voltage inverter electric cabinet. The operator fixes the outer filter screen 1 to the air inlet of the high-voltage inverter electric cabinet through bolts. At this time, when the high-voltage inverter electric cabinet conducts air-cooled heat dissipation inside, the external cold air needs to pass through the outer filter screen 1 and the fine hole filter cotton 9 before it can enter the inside of the high-voltage inverter electric cabinet. The dust and impurities in the air can be filtered out, which can ensure the safe and stable operation of the high-voltage inverter. After using for a period of time, the electromagnetic valve 6 is controlled by the time relay to open. The air inside the air compressor 7 will enter a number of air blowing nozzles 4 through the gas source hose 5 and the air blowing pipes 3. Finally, the gas is sprayed onto the fine hole filter cotton 9 and the outer filter screen 1 in the form of a surface, so as to blow off the impurities attached to the fine hole filter cotton 9 and the outer filter screen 1 and play a cleaning role. The operator can determine the start time and interval time of the time relay according to the specific use situation. At the same time, when a longer period of time has passed, if too much dust that cannot be cleaned accumulates inside the fine hole filter cotton 9, the operator can remove the filter cotton fixing frame 8 and replace it with a new fine hole filter cotton 9 to ensure a larger air flow rate.

[0027] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution and the inventive concept of the present utility model, making equivalent substitutions or changes should be covered within the protection scope of the present utility model.

Claims

1. Inverter heat dissipation filter regular reverse blowing system, comprising: External filter screen (1), characterized in that two groups of reverse air blowing structures are installed on the back surface of the external filter screen (1), the two groups of reverse air blowing structures are connected by a main air pipe, an air source structure is installed at the tail of the main air pipe, and a filter cotton structure is installed on the back surface of the external filter screen (1); The two groups of reverse air blowing structures include: two air blowing seats (2), an air blowing pipe (3) and a plurality of air blowing nozzles (4); The two air blowing seats (2) are respectively installed on the back surface of the external filter screen (1), the air blowing pipe (3) is installed on the back surfaces of the two air blowing seats (2), and the plurality of air blowing nozzles (4) are respectively installed on the front surface of the air blowing pipe (3).

2. The regular reverse blowing system for the heat dissipation filter net of the frequency converter according to claim 1, wherein The air source structure includes: an air source hose (5), an electromagnetic valve (6) and an air compressor (7); One end of the air source hose (5) is installed on the back surface of the main air pipe, the electromagnetic valve (6) is installed outside the air source hose (5), and the air outlet of the air compressor (7) is connected to the other end of the air source hose (5).

3. The regular back-blowing system for the heat dissipation filter net of the frequency converter according to claim 1, wherein The filter cotton structure includes: a filter cotton fixing frame (8) and a fine pore filter cotton (9); The fine pore filter cotton (9) is fixed on the back surface of the external filter screen (1) through the filter cotton fixing frame (8), and the filter cotton fixing frame (8) is fixed on the back surface of the external filter screen (1) by four bolts.

4. The regular back-blowing system for the heat dissipation filter screen of the frequency converter according to claim 1, wherein The external filter screen (1) is provided with a plurality of filter holes with larger apertures.

5. The regularly back-blowing system for the heat dissipation filter net of the frequency converter according to claim 2, wherein A fixing frame (10) is provided outside the air compressor (7).

6. The regular back-blowing system for the heat dissipation filter screen of the frequency converter according to claim 2, wherein The electromagnetic valve (6) can be controlled by a time relay.

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