High-sealing vector type frequency converter

Abstract

The utility model relates to the field of frequency converters, in particular to a high-sealing vector type frequency converter. The frequency converter comprises: a housing; the positive pressure ventilation structure comprises an air supply structure mounted at the bottom of the shell and heat dissipation holes formed in the top of the shell; the air supply structure comprises an air pipe joint mounted at the bottom of the shell, an external air source communicated with the air pipe joint, and filter cotton mounted at the end part of the air pipe joint; blocking pieces capable of being turned over upwards are arranged at the heat dissipation holes, and the blocking pieces are configured to be turned over when air flow penetrates through the heat dissipation holes to flow upwards and seal the heat dissipation holes when the air flow stops flowing upwards. The high-sealing vector-type frequency converter has two effects of heat dissipation and dust prevention, external dust can be prevented from entering the frequency converter along with airflow, the heat dissipation effect of the frequency converter is ensured, and the service life of the frequency converter is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of frequency converter, concretely relates to a high sealing vector type frequency converter. BACKGROUND

[0002] The frequency converter is the application frequency conversion technology and microelectronic technology, through the change motor work power frequency mode to control the electric power control equipment of AC motor.

[0003] The existing frequency converter carries out heat dissipation through the airflow flow. However, this frequency converter is often provided with the heat dissipation hole to ensure the heat dissipation effect, leading to the external dust entering the frequency converter inside along with the airflow, and the dust is accumulated on the electronic component, which influences the service life of the electronic component.

[0004] Therefore, the prior art needs a new technical scheme to solve the above problems. SUMMARY

[0005] In order to improve or solve the technical problems that the dust is accumulated on the electronic component in the prior art, which influences the service life of the frequency converter, the utility model provides a high sealing vector type frequency converter. The frequency converter includes: a shell, a positive pressure ventilation structure including a blowing structure installed at the bottom of the shell and a heat dissipation hole opened at the top of the shell, the blowing structure including a wind pipe joint installed at the bottom of the shell, an external air source communicated with the wind pipe joint and filter cotton installed at the end of the wind pipe joint, and a baffle arranged at the heat dissipation hole and capable of being turned up, the baffle being configured to turn when the airflow flows upward through the heat dissipation hole and close the heat dissipation hole when the airflow stops flowing upward.

[0006] In the high sealing vector type frequency converter, the positive pressure ventilation structure includes the blowing structure and the heat dissipation hole, and the blowing structure and the heat dissipation hole are arranged at the top and bottom of the shell respectively, so that the airflow flows from bottom to top to dissipate heat in the frequency converter. The blowing structure includes the wind pipe joint, the external air source and the filter cotton, which can filter the airflow entering the shell, so as to prevent dust from entering the frequency converter. The baffle is arranged at the heat dissipation hole and attached to the heat dissipation hole, which can prevent dust from entering the shell through the heat dissipation hole. When the blowing structure blows at the positive pressure state in the shell, that is, the air pressure in the shell is greater than the air pressure outside the shell, the airflow can turn the baffle, so that the airflow flows out of the heat dissipation hole, ensuring the heat dissipation of the frequency converter. Through the above arrangement, the high sealing vector type frequency converter has both heat dissipation and dust prevention effects, which can prevent external dust from entering the frequency converter along with the airflow, ensure the heat dissipation effect of the frequency converter and enhance the service life of the frequency converter.

[0007] Further, the material of the baffle is rubber.

[0008] Further, the thickness of the baffle is 0.1mm-0.3mm.

[0009] Further, the shell is formed with a mounting step along the circumference of the heat dissipation hole at the heat dissipation hole, the baffle is arranged on the mounting step, and one side of the baffle is fixedly connected with the mounting step.

[0010] Further, a dustproof curtain matched with the heat dissipation hole is further arranged on the top of the shell and arranged directly above the heat dissipation hole.

[0011] Further, a flow dispersing plate is further arranged in the shell and covers the outside of the air pipe joint.

[0012] Further, the shell comprises a rear shell and a front shell which is detachably connected with the rear shell, and the rear shell is formed with a mounting hole suitable for being connected with the frequency conversion control cabinet.

[0013] In summary, compared with the prior art, the utility model has the following beneficial effects:

[0014] The air supply structure comprises an air pipe joint, an external air source and filter cotton, can filter the airflow sent into the shell, avoids dust from entering the frequency converter; the baffle is arranged at the heat dissipation hole, the baffle is attached to the heat dissipation hole, can prevent dust from entering the shell from the heat dissipation hole; and when the air supply structure is in a positive pressure state due to air supply inside the shell, that is, the air pressure inside the shell is greater than the air pressure outside the shell, the airflow can blow the baffle to overturn, so that the airflow flows out from the heat dissipation hole, and the heat dissipation of the frequency converter is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] The preferred embodiments of the utility model will be described below with reference to the drawings, in which:

[0016] Figure 1 is the schematic diagram of an embodiment of the utility model of a high-sealing vector type frequency converter;

[0017] Figure 2 is the schematic diagram of the cross section structure of the utility model of a high-sealing vector type frequency converter.

[0018] List of reference signs: 1, shell; 11, rear shell; 12, front shell; 13, mounting hole; 21, air pipe joint; 22, heat dissipation hole; 23, flow dispersing plate; 24, baffle; 25, dustproof curtain. DETAILED DESCRIPTION

[0019] The preferred embodiments of the utility model will be described below with reference to the drawings, in which: Those skilled in the art should understand that these embodiments are only used for explaining the technical principles of the utility model and are not intended to limit the protection scope of the utility model.

[0020] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the direction or positional relationship of the terms based on the direction or positional relationship shown in the drawings, which is merely for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In addition, it should be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] In order to improve or solve the technical problems that dust accumulates on electronic components, affecting the service life of the frequency converter in the prior art, the utility model provides a kind of high sealing vector type frequency converter.The frequency converter includes: shell 1;Positive pressure ventilation structure, including the air supply structure of being installed in the bottom of shell 1 and the heat dissipation hole 22 of being opened in the top of shell 1;Air supply structure includes the air pipe joint 21 of being installed in the bottom of shell 1, the air source of being communicated with air pipe joint 21, and the filter cotton of being installed in the end of air pipe joint 21;Upwardly reversible baffle 24 is arranged at heat dissipation hole 22, baffle 24 is configured to be reversed when air flow passes through heat dissipation hole 22 and flows upward, and heat dissipation hole 22 is closed when air flow stops flowing upward.

[0023] Figure 1 It is the schematic diagram of an embodiment of the utility model of a kind of high sealing vector type frequency converter, Figure 2 As shown in Figure 1 And Figure 2 The utility model of a kind of high sealing vector type frequency converter includes shell 1 and positive pressure ventilation structure.

[0024] Continue to refer to Figure 1 And Figure 2The shell 1 comprises a rear shell 11 and a front shell 12 detachably connected with the rear shell 11. Specifically, mounting holes 13 are formed at four corners of the rear shell 11 for connecting with the frequency conversion control cabinet. Further, the rear shell 11 and the front shell 12 are connected through a clamping structure. Specifically, a sealing ring is arranged between the rear shell 11 and the front shell 12 to prevent dust from entering the shell 1 from the connection between the rear shell 11 and the front shell 12 and to enhance the sealing performance of the shell 1.

[0025] With reference to the drawings Figure 1 and Figure 2 The positive pressure ventilation structure is installed on the shell 1. In one or more embodiments, the positive pressure ventilation structure comprises a blowing structure installed at the bottom of the shell 1 and a heat dissipation hole 22 formed at the top of the shell 1. Specifically, the blowing structure comprises a wind pipe joint 21 installed at the bottom of the shell 1, an external air source in communication with the wind pipe joint 21, and filter cotton installed at the end of the wind pipe joint 21. Exemplarily, the external air source can be an air compressor or a blower. The wind pipe joint 21 is installed on the bottom wall of the shell 1 through a threaded structure. The external air source is in communication with the wind pipe joint 21 through an air pipe. The filter cotton is arranged in the air pipe and located at one end of the air pipe close to the wind pipe joint 21. Exemplarily, the air pipe can be divided into two sections, the two sections of the air pipe are sealingly connected through flanges, and the filter cotton is clamped between the flanges. Further, two wind pipe joints 21 are arranged side by side. Further, a flow distribution plate 23 is arranged in the shell 1, the flow distribution plate 23 is in a general frame shape, covers the outside of the wind pipe joint 21, and can distribute the airflow blown out by the wind pipe joint 21 to avoid the airflow directly impacting the electrical elements in the frequency converter. A plurality of through holes are arranged on the flow distribution plate 23 to distribute the airflow.

[0026] With reference to the drawings Figure 1 and Figure 2The array of heat dissipation holes 22 is arranged on the top of the shell 1. In one or more embodiments, the heat dissipation holes 22 are arranged on the rear shell 11, and a baffle 24 is arranged in each heat dissipation hole 22. Specifically, a mounting step is formed in the heat dissipation hole 22, and the mounting step is arranged along the circumference of the heat dissipation hole 22. The baffle 24 is shaped to match the shape of the heat dissipation hole 22, and is arranged on the mounting step to close the heat dissipation hole 22. Further, the baffle 24 is made of rubber, and one side of the baffle 24 is fixed on the mounting step, and the other side only contacts the mounting step. Specifically, the baffle 24 is a flexible rubber sheet, which can be bent and turned up when blown by the wind, so that the airflow flows out of the heat dissipation hole 22. The baffle 24 can be fixed on the mounting step by bonding, bolt connection or the like. Further, the thickness of the baffle 24 is 0.1mm-0.3mm. For example, the thickness of the baffle 24 is 0.2mm, which can be blown up when the difference between the air pressure in the shell 1 and the external air pressure is 5pa-10pa. Alternatively, the material of the baffle 24 can be replaced by plant fiber, i.e. a paper baffle. Further, a dust screen 25 is arranged on the top of the shell 1, one dust screen 25 is arranged above one corresponding heat dissipation hole 22, which can prevent dust from directly falling into the heat dissipation hole 22. Specifically, the dust screen 25 is wrapped outside the circumference of the heat dissipation hole 22, and an opening towards the rear is formed between the dust screen 25 and the shell 1. The airflow flowing out of the heat dissipation hole 22 is discharged through the opening.

[0027] The technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, those skilled in the art can make equivalent changes or replacements to the related technical features, and the technical cases after these changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A high-sealing vector inverter, characterized in that, include: Shell (1); The positive pressure ventilation structure includes an air supply structure installed at the bottom of the housing (1) and a heat dissipation hole (22) opened at the top of the housing (1); the air supply structure includes a duct connector (21) installed at the bottom of the housing (1), an external air source communicating with the duct connector (21), and a filter cotton installed at the end of the duct connector (21); a baffle (24) that can be flipped upward is arranged at the heat dissipation hole (22), the baffle (24) being configured to flip up when the airflow passes through the heat dissipation hole (22) and to close the heat dissipation hole (22) when the airflow stops flowing upward.

2. The high-sealing vector inverter according to claim 1, characterized in that, The baffle (24) is made of rubber.

3. A high-sealing vector inverter according to claim 2, characterized in that, The thickness of the baffle (24) is 0.1mm-0.3mm.

4. A high-sealing vector inverter according to claim 2, characterized in that, The housing (1) has an installation step formed around the heat dissipation hole (22) in the circumferential direction. The baffle (24) is placed on the installation step, and one side of the baffle (24) is fixedly connected to the installation step.

5. A high-sealing vector inverter according to claim 1, characterized in that, A dustproof curtain (25) matching the heat dissipation hole (22) is also arranged on the top of the housing (1), and the dustproof curtain (25) is arranged directly above the heat dissipation hole (22).

6. A high-sealing vector inverter according to claim 1, characterized in that, A diffuser plate (23) is also provided inside the housing (1), and the diffuser plate (23) covers the outside of the duct joint (21).

7. A high-sealing vector inverter according to claim 1, characterized in that, The housing (1) includes a rear housing (11) and a front housing (12) detachably connected to the rear housing (11). The rear housing (11) has mounting holes (13) suitable for connecting to the frequency converter control cabinet.

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