Low-cost modular frequency converter

Abstract

The utility model relates to the technical field of modularized frequency converters, in particular to a low-cost modularized frequency converter, which comprises a square frame and a screen plate, the outer side of the square frame is fixedly connected with the inner side of the screen plate, the inner side of the square frame is fixedly connected with the modularized frequency converter, and the upper side and the lower side of the square frame are respectively connected with a moisture-proof structure. Vertical plates are fixedly connected to the rear portions of the upper side and the lower side of the modular frequency converter respectively, a round plate drives a straight rod to move outwards, the inner side of the outer wall of the straight rod is separated from a damp-proof plate, meanwhile, the round plate stretches a spring, and then a handle is pulled outwards to drive the damp-proof plate to move outwards to be separated from the interior of a square frame. And then a new handle is held to insert the new moisture-proof plate into the square frame, and then the circular plate spring is loosened to provide resilience force, so that the circular plate drives the convex rod to move towards the inner side, and the inner side of the outer wall of the convex rod is inserted into the circular opening of the outer wall of the moisture-proof plate, thereby ensuring the protection performance of the modular frequency converter and ensuring the service life of the modular frequency converter.

Description

Technical Field

[0001] The utility model relates to the technical field of low-cost modular frequency converters, in particular to a low-cost modular frequency converter. Background Art

[0002] Modular inverter is a power control device that uses frequency conversion technology and microelectronics technology to control AC motors by changing the frequency of the motor's working power supply.

[0003] For example, an inverter with the authorization announcement number "CN111509951B" can prevent some impurity particles from entering the inverter body through the air inlet slot by installing the air inlet filter assembly at the bottom of the inverter body. At the same time, through the cooperation of the two baffles and the guide plate in the air inlet filter assembly, some magazines and dust can be discharged from the air outlet. The moisture absorption plate can absorb the water vapor contained in the gas to prevent the gas from being mixed with water vapor, which causes corrosion to the internal parts of the inverter. However, when the modular inverter is used, the moisture-proof plate is located on the guide plate, which makes it impossible to replace the moisture-proof plate. The modular inverter needs to continuously dissipate heat during operation, which means that the moisture-proof plate needs to continuously absorb moisture in the air. However, the moisture-proof plate has a saturation level of moisture absorption. When the moisture-proof plate is saturated with moisture, the air will still enter the interior of the modular inverter with moisture, reducing the protection performance of the modular inverter and shortening the service life of the modular inverter. Utility Model Content

[0004] The utility model aims to solve the problem of reducing the protection performance of the modular frequency converter and shortening the service life of the modular frequency converter, and proposes a low-cost modular frequency converter.

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

[0006] A low-cost modular inverter is designed, comprising a square frame and a mesh plate, wherein the outer side of the square frame is fixedly connected to the inner side of the mesh plate, the inner side of the square frame is fixedly connected to the modular inverter, the upper and lower sides of the square frame are respectively connected to moisture-proof structures, the upper and lower rear sides of the modular inverter are respectively fixedly connected to vertical plates, the inner walls of the vertical plates are connected to fixed structures, the rear end face of the modular inverter is fixedly connected to a bottom plate, and the four corners of the outer wall of the bottom plate are respectively processed with round openings.

[0007] Preferably, the moisture-proof structure includes a moisture-proof board and a sheath, the outer wall of the moisture-proof board is plugged into the outer wall groove of the square frame, the outer wall end of the moisture-proof board is fixedly connected to the inner wall of the sheath, a handle is fixedly connected to the outer side of the moisture-proof board, straight rods are respectively plugged into the front and rear sides of the moisture-proof board, a circular plate is fixedly connected to the outer side of the straight rod, a spring is sleeved on the outer wall of the straight rod, and both ends of the spring are respectively fixedly connected to the inner side of the circular plate and the outer wall of the square frame.

[0008] Preferably, the outer wall of the straight rod is plugged into the circular opening of the outer wall of the square frame.

[0009] Preferably, the outer wall of the sheath fits in with the outer wall notch of the square frame.

[0010] Preferably, the fixing structure comprises a convex rod and a baffle, the outer wall of the convex rod is plugged into the inner wall of the vertical plate, the front face of the convex rod is fitted with the rear end face of the baffle, and the rear end face of the convex rod is fixedly connected with a curved plate.

[0011] Preferably, the rear end face of the baffle is in contact with the front face of the vertical plate, and the inner wall of the curved plate is processed with a round opening.

[0012] The utility model proposes a low-cost modular inverter, which has the following beneficial effects: by holding the handle in the moisture-proof structure and then pulling the circular plate outward, the circular plate moves the straight rod outward, so that the inner side of the outer wall of the straight rod is separated from the moisture-proof plate, and at the same time the circular plate stretches the spring, and then the handle is pulled outward to move the moisture-proof plate outward and separate from the inside of the square frame, and then a new handle is held to insert the new moisture-proof plate back into the square frame, and then the circular plate spring is released to provide a rebound force, so that the circular plate moves the convex rod inward, so that the inner side of the outer wall of the convex rod is plugged into the circular opening of the outer wall of the moisture-proof plate, thereby ensuring the protection performance of the modular inverter and ensuring the service life of the modular inverter. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 for Figure 1 A schematic diagram of the connection relationship between the middle moisture-proof plate, the sheath and the handle;

[0015] Figure 3 for Figure 1 Schematic diagram of the connection relationship between the neutral plate, the straight rod and the baffle;

[0016] Figure 4 for Figure 1 The structural diagram of A in the figure;

[0017] Figure 5 for Figure 2 Schematic diagram of the structure of B;

[0018] Figure 6 for Figure 1 Schematic diagram of the Chinese frame structure.

[0019] In the figure: 1, square frame, 2, moisture-proof structure, 201, moisture-proof board, 202, sheath, 203, handle, 204, straight rod, 205, round plate, 206, spring, 3, fixed structure, 301, convex rod, 302, baffle, 303, curved plate, 4, modular inverter, 5, mesh plate, 6, bottom plate, 7, vertical plate, 8, fin plate. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] Example 1: Please refer to Figure 1-6 In the present embodiment, a low-cost modular inverter includes a square frame 1 and a mesh plate 5. The outer side of the square frame 1 is fixedly connected to the inner side of the mesh plate 5. The mesh plate 5 is made of stainless steel and is filled with a PP filter to block dust. A modular inverter 4 is fixedly connected to the inner side of the square frame 1. How to operate and use the modular inverter 4 is already existing technology and will not be elaborated on. The model is selected according to usage requirements. The upper and lower sides of the square frame 1 are respectively connected to a moisture-proof structure 2, and the upper and lower sides of the modular inverter 4 are respectively fixedly connected to vertical plates 7 at the rear, and the inner wall of the vertical plate 7 is connected to a fixed structure 3. The rear end face of the modular inverter 4 is fixedly connected to a bottom plate 6, and the four corners of the outer wall of the bottom plate 6 are respectively processed with round openings.

[0022] The moisture-proof structure 2 includes a moisture-proof plate 201 and a sheath 202. The outer wall of the moisture-proof plate 201 is plugged into the outer wall groove of the square frame 1. The moisture-proof plate 201 is made of melamine. The outer wall end of the moisture-proof plate 201 is fixedly connected to the inner wall of the sheath 202. The sheath 202 is made of rubber. A handle 203 is fixedly connected to the outer side of the moisture-proof plate 201. The handle 203 is convenient for driving the moisture-proof plate 201 to move up and down. The front and rear sides of the moisture-proof plate 201 are respectively A straight rod 204 is inserted, a circular plate 205 is fixedly connected to the outside of the straight rod 204, a spring 206 is sleeved on the outer wall of the straight rod 204, and the two ends of the spring 206 are respectively fixedly connected to the inner side of the circular plate 205 and the outer wall of the square frame 1. After the circular plate 205 is forced to move outward, it rebounds by the elastic force of the spring 206, the outer wall of the straight rod 204 is inserted into the circular opening of the outer wall of the square frame 1, and the outer wall of the sheath 202 is fitted with the outer wall notch of the square frame 1;

[0023] By holding the handle 203 in the moisture-proof structure 2, the circular plate 205 is then pulled outward, and the circular plate 205 moves the straight rod 204 outward, so that the inner side of the outer wall of the straight rod 204 is separated from the moisture-proof plate 201. At the same time, the circular plate 205 stretches the spring 206, and then the handle 203 is pulled outward to move the moisture-proof plate 201 outward and away from the inside of the square frame 1. Then, a new handle 203 is held to insert the new moisture-proof plate 201 back into the square frame 1, and then the circular plate 205 is released. The spring 206 provides a rebound force, so that the circular plate 205 moves the protruding rod 301 inward, so that the inner side of the outer wall of the protruding rod 301 is plugged into the circular opening of the outer wall of the moisture-proof plate 201, thereby ensuring the protection performance of the modular inverter and ensuring the service life of the modular inverter.

[0024] The fixing structure 3 includes a protruding rod 301 and a baffle 302. The outer wall of the protruding rod 301 is plugged into the inner wall of the vertical plate 7. The front of the protruding rod 301 fits with the rear end face of the baffle 302. The baffle 302 can prevent the vertical plate 7 from sliding forward. The rear end face of the protruding rod 301 is fixedly connected with a curved plate 303. The rear end face of the baffle 302 fits with the front of the vertical plate 7. The inner wall of the curved plate 303 is processed with a round opening.

[0025] Working principle:

[0026] Modular inverters control the main circuit through the control circuit. The rectifier in the main circuit converts AC power into DC power. The DC intermediate circuit smoothes and filters the DC power. The inverter finally converts the DC power into AC power of the required frequency and voltage. Some inverters will also add components such as CPU to the circuit to perform necessary torque calculations to control the power control equipment and realize differentiated control of a single inverter, also known as inverter module control. There is no need to set up multiple inverters to control power equipment, which reduces the cost of use.

[0027] Modular inverter installation:

[0028] Make the bottom plate 6 at the rear of the modular inverter 4 fit with the connection, then thread the bolt from the right front to the rear to fix it to the bottom plate 6. When the circular opening on the outer wall of the bottom plate 6 is misaligned and cannot be installed, push the protruding rod 301 backward on the inner wall of the vertical plate 7, and the moving support rod 301 moves the curved plate 303 backward, so that the rear of the curved plate 303 fits with the connection, and then thread the bolt from the right front to the rear to fix it to the curved plate 303.

[0029] Modular inverter moisture-proof plate replacement:

[0030] The air enters the square frame 1 through the mesh plate 5 and then enters the interior of the modular inverter 4 through the square frame 1, so that the ventilation inside the modular inverter 4 is realized to complete the heat dissipation. The moisture-proof plate 201 can absorb the moisture in the air. When replacing the moisture-proof plate 201, hold the handle 203 and then pull the circular plate 205 outward. The circular plate 205 moves the straight rod 204 outward, so that the inner side of the outer wall of the straight rod 204 is separated from the moisture-proof plate 201. At the same time, the circular plate 205 stretches the spring 206 and then pulls the handle 203 outward to move the moisture-proof plate 201 outward and away from the interior of the square frame 1. Then, hold the new handle 203 to insert the new moisture-proof plate 201 back into the square frame 1, and then release the circular plate 205. The spring 206 provides a rebound force, so that the circular plate 205 moves the convex rod 301 inward, so that the inner side of the outer wall of the convex rod 301 is plugged into the circular opening of the outer wall of the moisture-proof plate 201.

[0031] Example 2: Please refer to Figure 1-6 In this embodiment, a low-cost modular inverter further includes a fin plate 8, and the outer walls of the plurality of fin plates 8 are respectively fixedly connected to the upper and lower sides of the modular inverter 4.

[0032] Working principle:

[0033] Since the inner end of the fin plate 8 fits with the components on the inner wall of the modular inverter 4, the fin plate 8 can dissipate the heat generated by the internal components of the modular inverter 4 through its own copper material, thereby improving the heat dissipation performance of the modular inverter 4.

[0034] Although the present invention has been shown and described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A low-cost modular frequency converter, comprising a square frame (1) and a mesh plate (5), characterized in that: The outer side of the square frame (1) is fixedly connected to the inner side of the mesh plate (5), the inner side of the square frame (1) is fixedly connected to a modular inverter (4), the upper and lower sides of the square frame (1) are respectively connected to moisture-proof structures (2), the upper and lower sides of the modular inverter (4) are respectively fixedly connected to vertical plates (7) at the rear, the inner wall of the vertical plate (7) is connected to a fixed structure (3), the rear end surface of the modular inverter (4) is fixedly connected to a bottom plate (6), and the outer wall of the bottom plate (6) is respectively processed with round openings at four corners.

2. A low-cost modular inverter according to claim 1, characterized in that: The moisture-proof structure (2) comprises a moisture-proof plate (201) and a protective sleeve (202); the outer wall of the moisture-proof plate (201) is plugged into the outer wall notch of the square frame (1); the outer wall end of the moisture-proof plate (201) is fixedly connected to the inner wall of the protective sleeve (202); a handle (203) is fixedly connected to the outer side of the moisture-proof plate (201); straight rods (204) are respectively plugged into the front and rear sides of the moisture-proof plate (201); a round plate (205) is fixedly connected to the outer side of the straight rod (204); a spring (206) is sleeved on the outer wall of the straight rod (204); and two ends of the spring (206) are respectively fixedly connected to the inner side of the round plate (205) and the outer wall of the square frame (1).

3. A low-cost modular inverter according to claim 2, characterized in that: The outer wall of the straight rod (204) is plugged into the circular opening of the outer wall of the square frame (1).

4. A low-cost modular inverter according to claim 2, characterized in that: The outer wall of the protective sleeve (202) fits in a notch on the outer wall of the square frame (1).

5. A low-cost modular inverter according to claim 1, characterized in that: The fixing structure (3) comprises a protruding rod (301) and a baffle (302); the outer wall of the protruding rod (301) is plugged into the inner wall of the vertical plate (7); the front face of the protruding rod (301) is in contact with the rear end face of the baffle (302); and the rear end face of the protruding rod (301) is fixedly connected to a curved plate (303).

6. A low-cost modular inverter according to claim 5, characterized in that: The rear end surface of the baffle (302) fits the front surface of the vertical plate (7), and the inner wall of the curved plate (303) is processed with a round opening.

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