Cap-type frequency converter structure

Abstract

The utility model discloses a cap-type frequency converter structure, which comprises a fan, a component to be cooled, a heat dissipation component and a shell, the fan, the component to be cooled and the heat dissipation component are all arranged in the shell; an air inlet is formed in the top of the shell; the component to be cooled is arranged above the fan; the heat dissipation component is arranged above the fan and is adjacent to the component to be cooled, and the component to be cooled and the heat dissipation component are located below the air inlet. According to the utility model, the negative pressure area generated during rotation of the fan is utilized to attract air to flow to the fan from the air inlet through the heat dissipation component, and the air flowing to the fan is used for cooling the component to be cooled, so that the utilization rate of the cooling air of the frequency converter is improved, the axial space of the motor is fully utilized, and the service life of the motor is prolonged. Related parts or assemblies are compactly arranged, and the influence on the radial space of the motor is reduced.

Description

Technical Field

[0001] The utility model relates to the field of frequency converter assembly structures, in particular to a cap-type frequency converter structure. Background Art

[0002] The existing integrated variable frequency motor uses the wind generated by the positive pressure of the motor cooling fan to cool the power module in the inverter. However, this method has two problems. First, the positive pressure cooling wind will spread all around, and the cooling of the power module can only use a part of the cooling wind. When the motor power density is high and the air volume is small, only a part of the air volume is used, and the power module cannot be cooled. In order to cool the power module, only a cooling fan can be added, which also increases the failure point; second, the entire inverter protrudes from the outside of the motor, increasing the radial size of the motor. Utility Model Content

[0003] The utility model aims to provide a cap-type frequency converter structure, improve the frequency converter's utilization rate of cooling air, reduce the frequency converter's height increase on the motor's radial space, and assemble the frequency converter and the motor into a whole.

[0004] In order to solve the above technical problems, the utility model provides a cap-type inverter structure, including a fan, a component to be cooled, a heat dissipation component and a housing;

[0005] The fan, the component to be cooled and the heat dissipation component are all arranged in the housing;

[0006] The top of the housing is provided with an air inlet;

[0007] The component to be cooled is arranged above the fan; the heat dissipation component is arranged above the fan and is adjacent to the component to be cooled, and the component to be cooled and the heat dissipation component are located below the air inlet.

[0008] Furthermore, it also includes a control component; the control component includes a circuit board, a capacitor, a power connector and a signal connector, the circuit board is installed on a side of the shell and is connected to the component to be cooled; the capacitor is located in the space formed by the component to be cooled, the shell and the circuit board; the power connector and the signal connector are installed on the shell.

[0009] Furthermore, the power connector and the signal connector are installed on an outer side wall of the housing.

[0010] Furthermore, the power connector and the signal connector are mounted on the bottom wall of the front side of the housing.

[0011] Furthermore, it also includes a motor; the motor is installed below the fan, and the motor is provided with a wiring port.

[0012] Furthermore, the outer shell includes a square shell, a semicircular shell, a U-shaped metal bracket and a protective cover; the semicircular shell is arranged on an outer side surface of the square shell, and an inclined structure is arranged between the side wall of the square shell and the upper surface of the semicircular shell; a plurality of mounting holes are arranged on the square shell and the U-shaped metal bracket, the U-shaped metal bracket is sleeved on the outside of the motor, and is connected to the square shell and the motor through a fixing part; the protective cover is arranged at the air inlet.

[0013] Furthermore, the components to be cooled and the heat dissipation components are both arranged in the square shell; and the fan is arranged at the junction of the semicircular shell and the square shell.

[0014] Furthermore, the square shell and the U-shaped metal bracket are both provided with assembly openings of the same size as the wiring openings.

[0015] Furthermore, the shell is also provided with a back cover; the back cover is installed on an outer side surface of the square shell, located above the semicircular shell and connected to the semicircular shell.

[0016] Furthermore, it also includes a lifting ring; the lifting ring is connected to the housing and the motor through a fixing member.

[0017] Compared with the prior art, the utility model has at least the following beneficial effects:

[0018] In the design of the cap-type inverter structure, the component to be cooled is arranged above the fan; the heat dissipation component is arranged above the fan, and the negative pressure area generated when the fan rotates is used to attract the surrounding air from the air inlet through the heat dissipation component to flow to the fan, and the wind flowing to the fan is used to cool the component to be cooled, thereby improving the utilization rate of the inverter cooling air, making full use of the axial space of the motor, compactly arranging related components or components, and reducing the impact on the radial space of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of a cap-type frequency converter structure in one embodiment of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of a cap-type frequency converter structure after removing the outer shell in one embodiment of the utility model;

[0021] Figure 3 An exploded view of the structure of a cap-type frequency converter in one embodiment of the utility model;

[0022] Figure 4 It is a three-dimensional diagram of another side of the structure of the cap-type frequency converter in one embodiment of the utility model;

[0023] Figure 5 It is a side view of the structure of a cap-type frequency converter in one embodiment of the utility model;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of a cap-type frequency converter structure in another embodiment of the utility model;

[0025] Figure 7 This is a schematic diagram of the structure of a cap-type frequency converter structure in another embodiment of the utility model after removing the square housing and the semicircular housing;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of another side of the cap-type inverter structure in another embodiment of the utility model.

[0027] Figure numbers: 1. Housing; 2. Fan; 3. Parts to be cooled; 4. Heat dissipation parts; 5. Circuit board; 6. Capacitor; 7. Power connector; 8. Signal connector; 9. U-shaped metal bracket; 10. Mounting hole; 11. Protective cover; 12. Motor; 13. Air inlet; 14. Back cover; 15. Lifting ring. DETAILED DESCRIPTION

[0028] The following is a more detailed description of a cap-type frequency converter structure of the utility model in conjunction with a schematic diagram, which shows a preferred embodiment of the utility model. It should be understood that those skilled in the art can modify the utility model described herein and still achieve the beneficial effects of the utility model. Therefore, the following description should be understood as being widely known to those skilled in the art and not as a limitation to the utility model.

[0029] The present invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the accompanying drawings are in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0030] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0031] like Figures 1 to 8As shown, the embodiment of the utility model proposes a cap-type inverter structure, including a fan 2, a component to be cooled 3, a heat dissipation component 4 and a housing 1.

[0032] Specifically, the fan 2, the component to be cooled 3 and the heat dissipation component 4 are all arranged in the housing 1; the component to be cooled 3 is arranged above the fan 2; the heat dissipation component 4 is arranged above the fan 2 and is adjacent to the component to be cooled 3, and the component to be cooled 3 and the heat dissipation component 4 are located below the air inlet 13, and the air inlet 13 is connected.

[0033] The negative pressure area generated when the fan 2 rotates is used to attract surrounding air from the air inlet 13 through the heat dissipation component 4 to flow toward the fan 2, and the air flowing toward the fan 2 is used to cool the component to be cooled 3.

[0034] In this embodiment, the heat dissipation component 4 can be selected as a radiator, and the component to be cooled 3 can be selected as a power module. The heat dissipation component 4 and the component to be cooled 3 are closely arranged, which can reduce the space occupancy rate and thus reduce the radial dimension of the integrated design of the inverter.

[0035] In a preferred embodiment, the housing 1 includes a square shell, a semicircular shell, a U-shaped metal bracket 9 and a protective cover 11 .

[0036] The semicircular shell is arranged on an outer side of the square shell. The component to be cooled 3 and the heat dissipation component 4 are both arranged in the square shell, and the fan 2 is arranged at the junction of the semicircular shell and the square shell, so as to facilitate cooling the heat dissipation component 4 by the wind flowing to the fan 2. An inclined portion is also arranged between the side wall of the square shell and the upper surface of the semicircular shell, which provides stable support and facilitates the rapid diversion of wind to another part of the fan 2, thereby increasing the air flow rate and further improving the heat dissipation effect of the heat dissipation component 4.

[0037] The square housing and the U-shaped metal bracket 9 are both provided with a plurality of mounting holes 10, and the U-shaped metal bracket 9 is sleeved on the outside of the motor 12 and connected to the square housing and the motor 12 by screws. The mounting holes 10 on both sides of the U-shaped metal bracket 9 also serve as support points for the center of gravity of the inverter, further supporting the housing 1, so that the installation of the inverter is more stable.

[0038] In addition, an air inlet 13 is provided at the top of the housing 1, so that wind enters the housing 1 from the air inlet 13. The protective cover 11 is arranged at the air inlet 13 and is combined with the housing 1 to form a sealed space, which serves as an installation space for the inverter components and protects the inverter components.

[0039] In a specific example, the housing 1 made of plastic material can be produced by injection molding. The housing 1 can serve as both a converter housing and a fan cover of the motor 12, thereby simplifying the overall structure.

[0040] In this embodiment, the cap-type inverter structure further includes a motor 12; the motor 12 is installed below the fan 2, and the motor 12 is provided with a wiring port for wiring.

[0041] In addition, the cap-type inverter structure also includes a control component, which is used to control the operation of the motor. The control component includes a circuit board 5, a capacitor 6, a power connector 7 and a signal connector 8. The circuit board 5 is installed on a side of the housing 1 and connected to the component to be cooled; the capacitor 6 is located in the space formed by the component to be cooled 3, the housing 1 and the circuit board 5, and the power connector 7 and the signal connector 8 are installed on the housing 1, thereby improving the utilization of space and reducing the volume of the entire device.

[0042] In Example 1, the square housing and the U-shaped metal bracket 9 are both provided with an assembly opening of the same size as the wiring opening, and the assembly opening exposes the wiring opening for easy wiring. The power connector 7 and the signal connector 8 are mounted on an outer side wall of the housing.

[0043] In Example 2, the housing 1 is further provided with a back cover 14, which is mounted on an outer side of the square housing, located above the semicircular housing and connected to the semicircular housing, for protecting the internal structure. The square housing and the U-shaped metal bracket 9 are not provided with assembly ports, and the power connector 7 and the signal connector 8 are mounted on the bottom wall of the front side of the housing 1. In addition, the cap-type inverter structure also includes a lifting ring 15, which is connected to the housing 1 and the motor 12 by screws to reduce damage to the equipment during transportation.

[0044] In summary, the cap-type inverter structure proposed in the utility model can improve the utilization rate of the inverter cooling air, make full use of the axial space of the motor, compactly arrange the capacitors, power lines and signal lines, and reduce the impact of these components on the radial space of the motor. This design not only allows the inverter to be directly installed on the universal asynchronous motor, but also eliminates the junction box and fan cover, reducing the volume required for installing the inverter by 40%-50%. In addition, on the basis that the fan used for the traditional asynchronous motor with a power of 5.5KW meets the cooling air volume required by the 11KW inverter, the structure proposed in the utility model can control the temperature rise of the power module of the inverter within 50K, meet the actual operation requirements, and is particularly suitable for the integrated design of high power density variable frequency motors.

[0045] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A cap-type inverter structure, characterized in that: Including fans, components to be cooled, heat dissipation components and housing; The fan, the component to be cooled and the heat dissipation component are all arranged in the housing; The top of the housing is provided with an air inlet; The component to be cooled is arranged above the fan; the heat dissipation component is arranged above the fan and is adjacent to the component to be cooled, and the component to be cooled and the heat dissipation component are located below the air inlet.

2. The cap-type inverter structure according to claim 1, characterized in that: It also includes a control component; the control component includes a circuit board, a capacitor, a power connector and a signal connector, the circuit board is installed on a side of the shell and is connected to the component to be cooled; the capacitor is located in a space formed by the component to be cooled, the shell and the circuit board; the power connector and the signal connector are installed on the shell.

3. The cap-type inverter structure according to claim 2, characterized in that: The power connector and the signal connector are mounted on an outer side wall of the housing.

4. The cap-type inverter structure according to claim 2, characterized in that: The power connector and the signal connector are mounted on the bottom wall of the front side of the housing.

5. The cap-type inverter structure according to claim 1, characterized in that: It also includes a motor; the motor is installed below the fan and is provided with a wiring port.

6. The cap-type inverter structure according to claim 1, characterized in that: The outer shell includes a square shell, a semicircular shell, a U-shaped metal bracket and a protective cover; the semicircular shell is arranged on an outer side of the square shell, and an inclined structure is arranged between the side wall of the square shell and the upper surface of the semicircular shell; a plurality of mounting holes are arranged on the square shell and the U-shaped metal bracket, the U-shaped metal bracket is sleeved on the outside of the motor, and is connected to the square shell and the motor through a fixing part; the protective cover is arranged at the air inlet.

7. The cap-type inverter structure according to claim 6, characterized in that: The components to be cooled and the heat dissipation components are both arranged in the square shell; the fan is arranged at the junction of the semicircular shell and the square shell.

8. The cap-type inverter structure according to claim 6, characterized in that: The square shell and the U-shaped metal bracket are both provided with assembly openings of the same size as the wiring openings.

9. The cap-type inverter structure according to claim 6, characterized in that: The shell is also provided with a back cover; the back cover is installed on an outer side surface of the square shell, located above the semicircular shell and connected to the semicircular shell.

10. The hat-type inverter structure according to claim 1, characterized in that: It also includes a lifting ring; the lifting ring is connected to the housing and the motor through a fixing piece.

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