Frequency converter

Abstract

The utility model discloses a frequency converter, it relates to electronic equipment technical field, the frequency converter includes: base and cover body, the base has the recess, the recess faces upward, the outer side wall of base has first vertical plane, first horizontal plane and second vertical plane from top to bottom in proper order, the first vertical plane, the first horizontal plane and the second vertical plane face each other. The inner side wall of the cover body is sequentially provided with a third vertical surface, a second horizontal surface and a fourth vertical surface from top to bottom, when the cover body is matched with the base to seal the concave part, the first vertical surface is matched with the third vertical surface, the first horizontal surface is matched with the second horizontal surface, and the fourth vertical surface is matched with the second horizontal surface. The second vertical surface is matched with the fourth vertical surface; and the frequency conversion module is arranged in the concave part. The waterproof performance requirement of the frequency converter can be met on the basis of simple structure.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic equipment, in particular to a frequency converter. Background Art

[0002] In some vacuum equipment or water pump equipment, it is necessary to use a frequency converter to control its operating state in order to achieve higher-precision control and provide better overcurrent / overvoltage / overload protection and other functions. In the process of using a frequency converter to control vacuum equipment or pump equipment, most of the time there are certain requirements for the size of the frequency converter, and usually only a small space is given to install the frequency converter. In order to enable the frequency converter to be installed in the space given by the customer, the frequency converter must be miniaturized. A large part of the frequency converter is occupied by the heat sink. In order to reduce the volume of the frequency converter and maintain or even improve the heat dissipation capacity of the frequency converter, the heat sink structure used for cooling in the frequency converter is replaced with a water-cooled structure, so as to achieve the miniaturization of the frequency converter equipment and improve the heat dissipation effect. With the above structure, the frequency converter has been improved and enhanced in miniaturization and heat dissipation effect.

[0003] But later, many customers put forward new requirements for the inverter, which requires the inverter to have higher waterproof performance. In order to achieve the above purpose, the current inverter is generally waterproof by setting a rubber sealing ring. After setting the rubber sealing ring, it is necessary to use the base and cover of the inverter to press the rubber sealing ring to achieve a better waterproof purpose. This generally requires the use of fasteners such as screws to lock the base and the cover to achieve the purpose of pressing the rubber sealing ring, which makes the assembly steps and required parts between the base and the cover relatively more. Therefore, a new inverter is needed to meet the inverter's waterproof performance requirements on the basis of a simple structure. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present utility model is to provide a frequency converter which can meet the waterproof performance requirements of the frequency converter on the basis of a simple structure.

[0005] The specific technical solution of the embodiment of the utility model is:

[0006] A frequency converter, comprising:

[0007] A base and a cover, wherein the base has a recessed portion, and the recessed portion faces upward, wherein the outer side wall of the base has a first vertical surface, a first horizontal surface, and a second vertical surface in order from top to bottom, and the inner side wall of the cover has a third vertical surface, a second horizontal surface, and a fourth vertical surface in order from top to bottom, and when the cover and the base cooperate to seal the recessed portion, the first vertical surface cooperates with the third vertical surface, the first horizontal surface cooperates with the second horizontal surface, and the second vertical surface cooperates with the fourth vertical surface;

[0008] A frequency conversion module is arranged in the recessed portion.

[0009] Preferably, when the cover body and the base cooperate to seal the recessed portion, the first horizontal surface is in close contact with the second horizontal surface.

[0010] Preferably, the outer wall of the base has a third horizontal plane located at the upper end of the first vertical plane, and the inner wall of the cover body has a fourth horizontal plane located at the upper end of the third vertical plane. When the cover body and the base cooperate to seal the recessed portion, the third horizontal plane cooperates with the fourth horizontal plane.

[0011] Preferably, when the cover body and the base cooperate to seal the recessed portion, the third horizontal plane is in close contact with the fourth horizontal plane.

[0012] Preferably, the inner side wall of the cover body has a fifth horizontal plane located at the lower end of the fourth vertical plane; the second vertical plane extends downward below the fifth horizontal plane to a first preset distance, and the first preset distance is greater than or equal to 1 mm.

[0013] Preferably, the outer side wall of the base has an inclined surface located below the second vertical surface, and the inclined surface gradually protrudes outward in a direction from top to bottom.

[0014] Preferably, the outer side wall of the base has a fifth vertical surface located below the second vertical surface; in the vertical direction, the fifth vertical surface is flush with the outer side wall of the cover body.

[0015] Preferably, the angle between the inclined surface and the horizontal direction is between 10 degrees and 90 degrees.

[0016] Preferably, the outer wall of the base has a sixth vertical surface located above the third horizontal plane, and the inner wall of the cover body has a seventh vertical surface located above the fourth horizontal plane, and when the cover body and the base cooperate to seal the recessed portion, the sixth vertical surface cooperates with the seventh vertical surface.

[0017] Preferably, when the cover body and the base cooperate to seal the recessed portion, the first vertical surface is in contact with the third vertical surface, and the second vertical surface is in contact with the fourth vertical surface.

[0018] The technical solution of the utility model has the following significant beneficial effects:

[0019] In the present application, the recessed portion of the inverter faces upward, and the cover body and the base cooperate to seal the recessed portion. Therefore, under normal circumstances, water splashed from the outside of the inverter will flow downward from the outer walls of the base and the cover body under the action of gravity, and it is difficult to directly enter the recessed portion through the outer wall of the base and the inner wall of the cover body. Secondly, if water wants to enter the recessed portion through the outer wall of the base and the inner wall of the cover, it basically cannot flow in directly. To be precise, water slowly penetrates through the small gap between the outer wall of the base and the inner wall of the cover over a long period of time. Specifically, the external water first slowly penetrates upward through the small gap between the second vertical surface and the fourth vertical surface and then reaches between the first horizontal surface and the second horizontal surface. Since the first horizontal surface and the second horizontal surface are in contact with each other under the action of gravity, the amount of water that penetrates is very small. Later, due to the existence of the first vertical surface and the third vertical surface, the water that penetrates through the first horizontal surface and the second horizontal surface is difficult to continue to penetrate upward across the small gap between the first vertical surface and the third vertical surface and enter the recessed portion under the influence of gravity and the small amount of water. Therefore, based on the above two factors, the inverter in the present application can meet the waterproof performance requirements of the inverter without using components such as sealing rings and fasteners, thereby reducing the number of components of the inverter and simplifying the structure.

[0020] With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Features described and / or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only for illustration purposes to help understand the present invention, and are not intended to specifically limit the shapes and proportional dimensions of the components of the present invention. Under the guidance of the present invention, those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to specific circumstances.

[0022] Figure 1 This is a schematic diagram of the appearance structure of the frequency converter in the embodiment of the utility model;

[0023] Figure 2 An exploded diagram of the frequency converter in the embodiment of the utility model;

[0024] Figure 3 It is a cross-sectional view of the frequency converter in the embodiment of the utility model;

[0025] Figure 4 for Figure 3 A is a schematic diagram of a structure in one implementation mode;

[0026] Figure 5 for Figure 3 A is a schematic diagram of the structure in another implementation mode.

[0027] Reference numerals in the above drawings:

[0028] 1. Base; 11. Recessed portion; 12. First vertical plane; 13. First horizontal plane; 14. Second vertical plane; 15. Third horizontal plane; 16. Inclined plane; 17. Fifth vertical plane; 18. Sixth vertical plane; 2. Cover; 21. Third vertical plane; 22. Second horizontal plane; 23. Fourth vertical plane; 24. Fourth horizontal plane; 25. Fifth horizontal plane; 26. Seventh vertical plane; 3. Frequency conversion module. DETAILED DESCRIPTION

[0029] In combination with the accompanying drawings and the description of the specific embodiments of the present invention, the details of the present invention can be more clearly understood. However, the specific embodiments of the present invention described herein are only used to explain the purpose of the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as "disposed on" another element, it can be directly on the other element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the internal communication of two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] In order to meet the waterproof performance requirements of the inverter based on a simple structure, a inverter is proposed in this application. Figure 1 This is a schematic diagram of the structure of the frequency converter in the embodiment of the utility model. Figure 2 This is a partial cross-sectional view of the frequency converter in the embodiment of the utility model. Figure 3 is a cross-sectional view of the frequency converter in the embodiment of the utility model, as shown Figures 1 to 3 As shown, the frequency converter may include: a base 1 and a cover 2 .

[0032] The base 1 has a recessed portion 11, which faces upward. The recessed portion 11 may be located in the middle of the upper end surface of the base 1. The recessed portion 11 is used to accommodate the frequency conversion module 3. Since the base 1 has the recessed portion 11, the base 1 forms a bottom wall and a side wall, and the side walls of the base 1 are arranged in a circle in the circumferential direction, and the bottom wall and the side walls of the base 1 form the recessed portion 11.

[0033] The cover 2 cooperates with the base 1 to seal the recessed portion 11. The cover 2 has a top wall and a side wall, and the side wall of the cover 2 is embedded with the side wall of the base 1, so as to seal the recessed portion 11.

[0034] Figure 4 for Figure 3 A is a schematic diagram of a structure in one implementation mode, such as Figure 4 As shown, the outer side wall of the base 1 has a first vertical surface 12, a first horizontal surface 13 and a second vertical surface 14 from top to bottom. The connection between the first horizontal surface 13 and the second vertical surface 14 forms a first bending portion. The inner side wall of the cover body 2 has a third vertical surface 21, a second horizontal surface 22 and a fourth vertical surface 23 from top to bottom. The connection between the second horizontal surface 22 and the fourth vertical surface 23 forms a second bending portion.

[0035] When the cover 2 and the base 1 cooperate to seal the recessed portion 11, the first vertical surface 12 cooperates with the third vertical surface 21, the first horizontal surface 13 cooperates with the second horizontal surface 22, and the second vertical surface 14 cooperates with the fourth vertical surface 23. Further, when the cover 2 and the base 1 cooperate to seal the recessed portion 11, the first horizontal surface 13 and the second horizontal surface 22 can be closely attached to each other, so that it is more difficult for water to pass between the first horizontal surface 13 and the second horizontal surface 22. Further, when the cover 2 and the base 1 cooperate to seal the recessed portion 11, the first vertical surface 12 fits with the third vertical surface 21, and the second vertical surface 14 fits with the fourth vertical surface 23, so that it is more difficult for water to penetrate between the second vertical surface 14 and the fourth vertical surface 23, and between the first vertical surface 12 and the third vertical surface 21, or in other words, the amount of water penetrating between the second vertical surface 14 and the fourth vertical surface 23, and between the first vertical surface 12 and the third vertical surface 21 will be less. Further, the length of the second vertical surface 14 and the fourth vertical surface 23 that matches in the vertical direction needs to be greater than or equal to 2mm as much as possible. The length of the first vertical surface 12 and the third vertical surface 21 that matches in the vertical direction needs to be greater than or equal to 2mm as much as possible. The length of the first horizontal surface 13 and the second horizontal surface 22 that matches in the horizontal direction needs to be greater than or equal to 0.5mm as much as possible.

[0036] The frequency conversion module 3 is disposed in the recess 11 . Since the cover 2 cooperates with the base 1 to seal the recess 11 , water outside the frequency converter is unlikely to enter the recess 11 of the base 1 , thus not affecting the frequency conversion module 3 .

[0037] In the present application, the recessed portion 11 of the inverter faces upward, and the cover body 2 cooperates with the base 1 to seal the recessed portion 11. Therefore, under normal circumstances, water splashed from the outside of the inverter will flow downward from the outer walls of the base 1 and the cover body 2 under the action of gravity, and it is difficult to directly enter the recessed portion 11 through the outer wall of the base 1 and the inner wall of the cover body 2. Secondly, if water wants to enter the recessed portion 11 through the outer wall of the base 1 and the inner wall of the cover body 2, it is basically impossible for water to flow in directly. To be precise, water slowly penetrates through the tiny gap between the outer wall of the base 1 and the inner wall of the cover body 2 over a long period of time. Specifically, the external water first slowly penetrates upward through the tiny gap between the second vertical surface 14 and the fourth vertical surface 23 and then reaches between the first horizontal surface 13 and the second horizontal surface 22. Since the first horizontal surface 13 and the second horizontal surface 22 are in contact with each other under the action of gravity, the amount of water that penetrates is very small. Later, due to the existence of the first vertical surface 12 and the third vertical surface 21, the water that has penetrated the first horizontal surface 13 and the second horizontal surface 22 is difficult to continue to penetrate upward through the tiny gap between the first vertical surface 12 and the third vertical surface 21 and enter the recessed portion 11 due to the influence of gravity and the small amount of water. Therefore, based on the above two factors, the inverter in the present application can meet the waterproof performance requirements of the inverter without using components such as sealing rings and fasteners, thereby reducing the number of parts of the inverter and simplifying the structure.

[0038] As feasible, Figure 4 As shown, the outer side wall of the base 1 has a third horizontal surface 15 located at the upper end of the first vertical surface 12. The inner side wall of the cover body 2 has a fourth horizontal surface 24 located at the upper end of the third vertical surface 21. When the cover body 2 and the base 1 cooperate to seal the recessed portion 11, the third horizontal surface 15 can cooperate with the fourth horizontal surface 24. Through the above structure, the possibility of a very small amount of water that penetrates through the tiny gap between the first vertical surface 12 and the third vertical surface 21 and then passes through the third horizontal surface 15 and the fourth horizontal surface 24 can be greatly reduced. Further, when the cover body 2 and the base 1 cooperate to seal the recessed portion 11, the third horizontal surface 15 and the fourth horizontal surface 24 are tightly attached, which can further reduce the possibility of external water penetrating into the recessed portion 11. The connection between the third horizontal surface 15 and the first vertical surface 12 forms a third bending portion. The connection between the fourth horizontal surface 24 and the third vertical surface 21 forms a fourth bending portion.

[0039] As feasible, Figure 4As shown, the inner side wall of the cover body 2 has a fifth horizontal surface 25 located at the lower end of the fourth vertical surface 23. The second vertical surface 14 extends downward below the fifth horizontal surface 25 to a first preset distance, and the first preset distance is greater than or equal to 1 mm. Through the above structure, the possibility of water droplets adhering to the second vertical surface 14 below the fifth horizontal surface 25 can be effectively reduced. Under the action of gravity, water is made to flow downward as much as possible at the second vertical surface 14 to avoid staying at the second vertical surface 14 that is level with the fifth horizontal surface 25, thereby further reducing the possibility of water later penetrating into the space between the second vertical surface 14 and the fourth vertical surface 23 through penetration.

[0040] Further, such as Figure 4 As shown, the outer wall of the base 1 has an inclined surface 16 located below the second vertical surface 14, and the inclined surface 16 gradually protrudes outward in the direction from top to bottom. This structure can make it easier for water to flow downward through the inclined surface 16 at the second vertical surface 14, and avoid it staying at the second vertical surface 14 that is flush with the fifth horizontal plane 25. In order to further ensure that the water flows smoothly downward through the inclined surface 16 at the second vertical surface 14, as a preferred embodiment, the angle between the inclined surface 16 and the horizontal direction can be between 10 degrees and 90 degrees.

[0041] As a feasible method, in order to make the side wall of the inverter more beautiful and smooth, such as Figure 4 As shown, the outer side wall of the base 1 has a fifth vertical surface 17 located below the second vertical surface 14 ; in the vertical direction, the fifth vertical surface 17 is flush with the outer side wall of the cover body 2 .

[0042] As feasible, Figure 5 for Figure 3 A is a schematic diagram of a structure in another embodiment, such as Figure 5 As shown, the outer side wall of the base 1 may have a sixth vertical surface 18 located above the third horizontal surface 15. The inner side wall of the cover body 2 may have a seventh vertical surface 26 located above the fourth horizontal surface 24. When the cover body 2 and the base 1 cooperate to seal the recessed portion 11, the sixth vertical surface 18 cooperates with the seventh vertical surface 26. By providing more corresponding vertical surfaces on the outer side wall of the base 1 and the inner side wall of the cover body 2, the possibility of external water penetrating into the recessed portion 11 can be further reduced.

[0043] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of ... " describing a combination should include determined elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The use of the terms "comprising" or "including" to describe the combination of elements, ingredients, parts or steps here also contemplates the implementation method consisting essentially of these elements, ingredients, parts or steps. Here, by using the term "may", it is intended to illustrate that any attribute described that "may" includes is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "one" used to describe an element, ingredient, part or step is not said to exclude other elements, ingredients, parts or steps.

Claims

1. A frequency converter, characterized in that: The frequency converter comprises: A base and a cover, wherein the base has a recessed portion, and the recessed portion faces upward, wherein the outer side wall of the base has a first vertical surface, a first horizontal surface, and a second vertical surface in order from top to bottom, and the inner side wall of the cover has a third vertical surface, a second horizontal surface, and a fourth vertical surface in order from top to bottom, and when the cover and the base cooperate to seal the recessed portion, the first vertical surface cooperates with the third vertical surface, the first horizontal surface cooperates with the second horizontal surface, and the second vertical surface cooperates with the fourth vertical surface; A frequency conversion module is arranged in the recessed portion.

2. The frequency converter according to claim 1, characterized in that: When the cover body and the base cooperate to seal the recessed portion, the first horizontal surface is in close contact with the second horizontal surface.

3. The frequency converter according to claim 1, characterized in that: The outer wall of the base has a third horizontal plane located at the upper end of the first vertical plane, and the inner wall of the cover body has a fourth horizontal plane located at the upper end of the third vertical plane. When the cover body and the base cooperate to seal the recessed portion, the third horizontal plane cooperates with the fourth horizontal plane.

4. The frequency converter according to claim 3, characterized in that: When the cover body and the base cooperate to seal the recessed portion, the third horizontal plane is in close contact with the fourth horizontal plane.

5. The frequency converter according to claim 1, characterized in that: The inner side wall of the cover body has a fifth horizontal plane located at the lower end of the fourth vertical plane; the second vertical plane extends downward below the fifth horizontal plane to a first preset distance, and the first preset distance is greater than or equal to 1 mm.

6. The frequency converter according to claim 5, characterized in that: The outer side wall of the base has an inclined surface located below the second vertical surface, and the inclined surface gradually protrudes outward in a direction from top to bottom.

7. The frequency converter according to claim 6, characterized in that: The outer side wall of the base has a fifth vertical surface located below the second vertical surface; in the vertical direction, the fifth vertical surface is flush with the outer side wall of the cover body.

8. The frequency converter according to claim 6, characterized in that: The angle between the inclined surface and the horizontal direction is between 10 degrees and 90 degrees.

9. The frequency converter according to claim 3, characterized in that: The outer wall of the base has a sixth vertical surface located above the third horizontal plane, and the inner wall of the cover body has a seventh vertical surface located above the fourth horizontal plane. When the cover body and the base cooperate to seal the recessed portion, the sixth vertical surface cooperates with the seventh vertical surface.

10. The frequency converter according to claim 1, characterized in that: When the cover body and the base cooperate to seal the recessed portion, the first vertical surface is in contact with the third vertical surface, and the second vertical surface is in contact with the fourth vertical surface.

Images