Protective device and power converter
By adopting pressure transfer channels and sealed space protection devices in power conversion equipment, the problem of the breathable valve being unable to isolate the external environment is solved, the internal and external pressure difference of the electronic device is balanced, and the reliability is improved.
Patent Information
- Application Number
- CN202422757626.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-26
- Estimated Expiration
- 2034-11-12
AI Technical Summary
In existing power conversion equipment, the vent valve cannot completely isolate the external environment, causing corrosion or failure of electronic components and affecting reliability.
A protective device is used to achieve pressure balance inside and outside the accommodating cavity through a pressure transfer channel, and a sealed space is formed between the pressure transfer channel and the accommodating cavity to prevent water vapor, pollutant gas and dust from entering.
The internal and external pressure difference of the electronic device is balanced, the reliability of the electronic device is improved, and corrosion and failure are prevented.
Smart Images
Figure CN223391535U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of power conversion equipment, and more specifically, to a protection device and a power converter. Background Art
[0002] In power conversion equipment, electronic components are typically placed in a sealed electronic cavity. This affects the internal and external pressure balance of the electronic cavity. Therefore, a vent valve is often installed on the cavity wall to achieve pressure balance. However, this vent valve cannot completely isolate the external environment, which can easily cause corrosion or failure of the electronic components inside.
[0003] Therefore, how to improve the reliability of electronic devices has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content
[0004] In view of this, an object of the present application is to provide a protection device to improve the reliability of electronic devices.
[0005] Another object of the present application is to provide a power converter having the above protection device.
[0006] To achieve the above objectives, this application provides the following technical solutions:
[0007] A protective device comprising:
[0008] The box body defines a housing cavity for accommodating electronic devices, the inner and outer sides of the housing cavity are connected by a pressure transfer channel, the pressure transfer channel is used to transfer pressure from a high-pressure side to a low-pressure side so as to balance the pressure inside and outside the housing cavity, and the pressure transfer channel and the housing cavity are enclosed to form a sealed space.
[0009] Optionally, in the above-mentioned protective device, the box body includes a sleeve, which limits the cavity, and a first air port and a second air port are respectively provided at both ends of the sleeve, the first air port is connected to the inner side of the accommodating cavity, and the second air port is connected to the outer side of the accommodating cavity to form the pressure transfer channel.
[0010] Optionally, in the above-mentioned protective device, a movable sealing member is provided in the cavity of the sleeve, and the sealing member is in contact with the inner wall of the sleeve.
[0011] Optionally, in the above protective device, at least one end of the sleeve is connected to the sealing member via a reset elastic member.
[0012] Optionally, in the above-mentioned protective device, the box body includes an airbag, the airbag limits an airbag cavity, the airbag cavity is provided with a third air port, and the third air port is used to communicate with the inner side or the outer side of the accommodating cavity to form the pressure transfer channel.
[0013] Optionally, in the above-mentioned protective device, the airbag is located inside the accommodating cavity, and the third air port is communicated with the outside of the accommodating cavity;
[0014] When the pressure inside the accommodating cavity is greater than the pressure outside the accommodating cavity, the airbag cavity contracts and deforms;
[0015] When the pressure inside the accommodating cavity is lower than the pressure outside the accommodating cavity, the airbag cavity expands and dilates.
[0016] Optionally, in the above-mentioned protective device, the airbag is located outside the accommodating cavity, and the third air port is communicated with the inside of the accommodating cavity;
[0017] When the pressure inside the accommodating cavity is greater than the pressure outside the accommodating cavity, the airbag cavity expands and dilates;
[0018] When the pressure inside the accommodating cavity is lower than the pressure outside the accommodating cavity, the airbag cavity contracts and deforms.
[0019] Optionally, in the above-mentioned protective device, a plurality of support rings are arranged at intervals in the airbag cavity.
[0020] Optionally, in the above-mentioned protective device, the box body includes a fourth air port, which is respectively connected to the inner and outer sides of the accommodating cavity to form the pressure transfer channel, and an elastic membrane is provided at the position of the fourth air port, and the elastic membrane is used to expand toward the low-pressure side.
[0021] A power converter comprises an electronic device and the protective device as described in any one of the above items, wherein the electronic device is located inside the protective device.
[0022] The protective device provided by the present application places the electronic device in the accommodating cavity of the box. When the electronic device heats up and the pressure inside the accommodating cavity increases to a value greater than the pressure outside the accommodating cavity, the pressure can be transferred from the inside of the accommodating cavity to the outside through the pressure transfer channel, so that the pressure inside the accommodating cavity and the pressure outside the accommodating cavity are balanced, that is, the pressure difference between the inside and outside of the accommodating cavity is balanced; when the pressure outside the accommodating cavity is greater than the pressure inside the accommodating cavity, the pressure can be transferred from the outside of the accommodating cavity to the inside through the pressure transfer channel, so that the pressure inside the accommodating cavity and the pressure outside the accommodating cavity are balanced, that is, the pressure difference between the inside and outside of the accommodating cavity is balanced. At the same time, the pressure transfer channel and the accommodating cavity are surrounded to form a sealed space, which can prevent water vapor, polluting gases and dust from entering. As can be seen from the above example, the protective device provided by the present application can realize the pressure transfer from the high pressure side to the low pressure side through the pressure transfer channel, thereby achieving a balance in the pressure difference between the inside and outside of the accommodating cavity that accommodates the electronic device. At the same time, the pressure transfer channel and the accommodating cavity are surrounded to form a sealed space, which can prevent water vapor, polluting gases and dust from entering, thereby improving the reliability of the electronic device.
[0023] The technical features mentioned above, the technical features described below, and the technical features shown individually in the accompanying drawings may be combined arbitrarily, as long as the combined technical features do not conflict with each other. All possible feature combinations are technical contents explicitly described in this document. Any of the multiple sub-features included in the same statement can be applied independently and does not necessarily have to be applied in conjunction with the other sub-features. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.
[0025] Figure 1 A schematic diagram of the structure of the protective device provided in Example 1 of the present application;
[0026] Figure 2 Schematic diagram of the structure of the airbag provided in Example 2 of this application Figure 1 ;
[0027] Figure 3 Schematic diagram of the structure of the airbag provided in Example 2 of this application Figure 2 ;
[0028] Figure 4 Schematic diagram of the structure of the protective device provided in Example 2 of this application Figure 1 ;
[0029] Figure 5 Schematic diagram of the structure of the protective device provided in Example 2 of this application Figure 2 ;
[0030] Figure 6 Schematic diagram of the structure of the protective device provided in Example 2 of this application Figure 3 ;
[0031] Figure 7 Schematic diagram of the structure of the protective device provided in Example 2 of this application Figure 4 ;
[0032] Figure 8 This is a schematic diagram of the structure of the protective device provided in Example 3 of the present application.
[0033] Wherein, 100 is a box body, 101 is a receiving cavity;
[0034] 200 is a sleeve, 201 is a cavity, 202 is a first air port, 203 is a second air port, 204 is a sealing member, and 205 is a resetting elastic member;
[0035] 300 is the airbag, 301 is the airbag cavity, 302 is the third air port, and 303 is the support ring;
[0036] 400 is the fourth air port, and 401 is the elastic membrane. DETAILED DESCRIPTION
[0037] The core of this application is to provide a protection device to improve the reliability of electronic devices.
[0038] Another core of the present application is to provide a power converter having the above-mentioned protection device.
[0039] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0040] In power conversion equipment, electronic components are typically placed in a sealed electronic cavity. This affects the internal and external pressure balance of the electronic cavity. Therefore, a vent valve is often installed on the cavity wall to achieve pressure balance. However, this vent valve cannot completely isolate the external environment, which can easily cause corrosion or failure of the electronic components inside.
[0041] To this end, an embodiment of the present application discloses a protective device, including a box body 100, which limits a housing cavity 101 for accommodating electronic devices. The box body 100 can transfer pressure from a high-pressure side to a low-pressure side through a pressure transfer channel, thereby achieving a balance in the pressure difference between the inner and outer sides of the housing cavity 101 for accommodating electronic devices. At the same time, the pressure transfer channel and the housing cavity 101 are enclosed to form a sealed space, which can prevent water stains and dust from entering, thereby improving the reliability of the electronic devices.
[0042] The following will be combined Figures 1 to 8 The protective device disclosed in the embodiments of the present application is specifically explained and illustrated.
[0043] Among them, Figure 1 As shown, the housing 100 has a housing cavity 101 for accommodating electronic components. By placing the electronic components of the power converter in the housing cavity 101 of the housing 100, the electronic components are protected. At the same time, the inside and outside of the housing cavity 101 are connected by a pressure transfer channel to transfer the pressure from the higher pressure side to the lower pressure side, so that the pressure inside the housing cavity 101 and the pressure outside the housing cavity 101 are balanced, thereby achieving a balance in the pressure difference between the inside and outside of the housing cavity 101 for accommodating the electronic components. The pressure transfer channel and the housing cavity 101 are enclosed to form a sealed space, which can prevent the entry of water vapor, polluting gases and dust, thereby improving the reliability of the electronic components.
[0044] When the electronic device generates heat and the pressure inside the accommodating cavity 101 increases to a level greater than the pressure outside the accommodating cavity 101, the pressure can be transferred from the inside to the outside of the accommodating cavity 101 through the pressure transfer channel, so that the pressure inside and the pressure outside the accommodating cavity 101 are balanced, that is, the pressure difference between the inside and outside of the accommodating cavity 101 is balanced; when the pressure outside the accommodating cavity 101 is greater than the pressure inside the accommodating cavity 101, the pressure can be transferred from the outside to the inside of the accommodating cavity 101 through the pressure transfer channel, so that the pressure inside and the pressure outside the accommodating cavity 101 are balanced, that is, the pressure difference between the inside and outside of the accommodating cavity 101 is balanced, thereby improving the reliability of the electronic device.
[0045] In some embodiments, as Figure 1As shown, the housing 100 may include a sleeve 200, and the sleeve 200 has a cavity 201 for gas transfer. At the same time, a first gas port 202 and a second gas port 203 are respectively provided at both ends of the sleeve 200. The first gas port 202 is in communication with the inner side of the accommodating cavity 101, and the second gas port 203 is in communication with the outer side of the accommodating cavity 101. A pressure transfer channel is formed through the first gas port 202, the cavity 201 of the sleeve 200, and the second gas port 203. This allows pressure to be transferred from the side with higher pressure to the side with lower pressure, thereby balancing the pressure inside and outside the accommodating cavity 101, thereby achieving a balanced pressure difference between the inner and outer sides of the accommodating cavity 101 that accommodates the electronic device.
[0046] In order to achieve the sealing of the box 100, in some embodiments, as Figure 1 As shown, a seal 204 is provided in the cavity 201 of the sleeve 200, and the seal 204 is in contact with the inner wall of the sleeve 200 to ensure the sealing of the accommodating cavity 101. At the same time, the seal 204 can slide with the inner wall of the sleeve 200 so that the seal 204 can move along the inner wall of the sleeve 200 toward the side with less pressure. Specifically, the seal 204 divides the cavity 201 of the sleeve 200 into two chambers. For ease of understanding, the chamber connected to the inner side of the accommodating cavity 101 is defined as the inner chamber, and the chamber connected to the outer side of the accommodating cavity 101 is defined as the outer chamber. The inner chamber is connected to the inner side of the accommodating cavity 101 through the first air port 202, and the outer chamber is connected to the outer side of the accommodating cavity 101 through the second air port 203. When the air pressure inside the accommodating chamber 101 is higher than the air pressure outside, the sealing member 204 moves toward the outer chamber. At this time, the pressure inside the accommodating chamber 101 gradually decreases, and finally the pressure difference between the inside and outside of the accommodating chamber 101 is balanced. On the contrary, when the air pressure inside the accommodating chamber 101 is lower than the air pressure outside, the sealing member 204 moves toward the inner chamber. At this time, the pressure inside the accommodating chamber 101 gradually increases, and finally the pressure difference between the inside and outside of the accommodating chamber 101 is balanced.
[0047] In order to better achieve the pressure balance between the inner and outer sides of the accommodating chamber 101, as shown in FIG. Figure 1As shown, in some embodiments, at least one end of the sleeve 200 can be connected to the sealing member 204 via a reset elastic member 205, wherein the reset elastic member 205 can be a compression spring. When the air pressure inside the accommodating chamber 101 is higher than the air pressure outside, the sealing member 204 moves toward the outer chamber, at which time the reset elastic member 205 is stretched, and the pressure inside the accommodating chamber 101 gradually decreases, ultimately achieving a balance between the pressure difference between the inside and outside of the accommodating chamber 101; conversely, when the air pressure inside the accommodating chamber 101 is lower than the air pressure outside, the sealing member 204 moves toward the inner chamber, at which time the reset elastic member 205 is compressed, and the pressure inside the accommodating chamber 101 gradually increases, ultimately achieving a balance between the pressure difference between the inside and outside of the accommodating chamber 101. It can be seen from the above example that by setting the reset elastic member 205, the accommodating chamber 101 of the box body 100 can better automatically achieve a balanced pressure difference between the inner and outer sides of the accommodating chamber 101 without manual intervention. At the same time, the elastic potential energy of the reset elastic member 205 can be used to quickly reset the seal 204.
[0048] In the above embodiment, if Figure 1 As shown, the reset elastic member 205 can be connected to the inner chamber of the sleeve 200. Of course, the reset elastic member 205 can also be connected to the outer chamber of the sleeve 200, or the reset elastic member 205 can be connected to both the inner chamber and the outer chamber of the sleeve 200. This is not limited in this article.
[0049] It should be noted that the sleeve 200 can be arranged inside the accommodating cavity 101 of the box body 100, or can be arranged outside the accommodating cavity 101 of the box body 100, or part of the sleeve 200 can be located inside the accommodating cavity 101, and part of the sleeve 200 can be located outside the accommodating cavity 101. The specific arrangement of the sleeve 200 can be determined according to actual usage requirements. For example, when the accommodating cavity 101 of the box body 100 occupies a large space, part or all of the sleeve 200 can be placed outside to ensure that there is a large space in the accommodating cavity 101 of the box body 100. Of course, the structural shape of the sleeve 200 can adopt a cylindrical structure, a cubic structure or a triangular prism structure, etc., and the sealing member 204 can adopt a circular, rectangular or triangular shape that is compatible with the structural shape of the sleeve 200, etc., which is not limited herein.
[0050] In some embodiments, as Figures 2 to 7 As shown, the box 100 may also include an air bag 300. Figure 2 and Figure 3 As shown, the airbag 300 has an airbag cavity 301, and the airbag cavity 301 is provided with a third air port 302. The third air port 302 can be connected to the inner side or the outer side of the accommodating cavity 101 to form a pressure transfer channel, so that the volume of the airbag cavity 301 can be changed through the expansion and contraction or elastic deformation of the airbag 300, thereby achieving a balance of the pressure difference between the inside and outside of the accommodating cavity 101. Of course, as Figure 4and Figure 5 As shown, the airbag 300 can be arranged outside the accommodating cavity 101 of the box body 100, or can be arranged inside the accommodating cavity 101 of the box body 100, as shown in FIG. Figure 6 and Figure 7 As shown, the specific arrangement of the airbag 300 can be determined according to actual usage requirements. For example, when the accommodating cavity 101 of the box body 100 occupies a large space, the airbag 300 can be placed outside to ensure that there is a larger space inside the accommodating cavity 101 of the box body 100.
[0051] In some embodiments, as Figure 4 and Figure 5 As shown, the airbag 300 can be arranged outside the accommodating cavity 101 of the box body 100, and the third air port 302 of the airbag 300 is connected to the inner side of the accommodating cavity 101. When the air pressure inside the accommodating cavity 101 is higher than the air pressure outside the accommodating cavity 101, the airbag cavity 301 of the airbag 300 expands and becomes larger, as shown in FIG. Figure 4 As shown, at this time, the pressure inside the accommodating cavity 101 gradually decreases, and finally the pressure difference between the inside and outside of the accommodating cavity 101 reaches equilibrium; when the air pressure inside the accommodating cavity 101 is lower than the air pressure outside the accommodating cavity 101, the airbag cavity 301 of the airbag 300 shrinks and deforms, as shown in FIG. Figure 5 As shown, at this time, the pressure inside the accommodating chamber 101 gradually increases, and finally the pressure difference between the inside and outside of the accommodating chamber 101 reaches equilibrium.
[0052] In some embodiments, as Figure 6 and Figure 7 As shown, the airbag 300 can be arranged inside the accommodating cavity 101 of the box body 100, and the third air port 302 of the airbag 300 is connected to the outside of the accommodating cavity 101. When the air pressure inside the accommodating cavity 101 is higher than the air pressure outside the accommodating cavity 101, the airbag cavity 301 of the airbag 300 shrinks and deforms, as shown in FIG. Figure 6 As shown, at this time, the pressure inside the accommodating cavity 101 gradually decreases, and finally the pressure difference between the inside and outside of the accommodating cavity 101 reaches equilibrium; when the air pressure inside the accommodating cavity 101 is lower than the air pressure outside the accommodating cavity 101, the airbag cavity 301 of the airbag 300 expands and becomes larger, as shown in FIG. Figure 7 As shown, at this time, the pressure inside the accommodating chamber 101 gradually increases, and finally the pressure difference between the inside and outside of the accommodating chamber 101 reaches equilibrium.
[0053] In the above embodiment, to enhance the strength of the airbag 300, multiple support rings 303 may be spaced apart within the airbag cavity 301 of the airbag 300. The support rings 303 may be made of an elastic rubber material, thereby ensuring that the airbag 300 can be expanded or deformed elastically while also enhancing the strength of the airbag 300 and preventing damage from excessive pressure. Two, three, or more support rings 303 may be provided, or a single support ring may be provided, and this is not a limitation herein.
[0054] In some embodiments, as Figure 8 As shown, the housing 100 may also include a fourth air port 400, which may be connected to the inside and outside of the accommodating chamber 101 to form a pressure transfer channel. At the same time, an elastic membrane 401 may be provided at the location of the fourth air port 400 to achieve a sealing effect on the fourth air port 400 of the housing 100, and the elastic membrane 401 may expand toward the side with lower pressure, thereby achieving a balance in the pressure difference between the inside and outside of the accommodating chamber 101. When the air pressure inside the accommodating chamber 101 is higher than the air pressure outside the accommodating chamber 101, the elastic membrane 401 may expand toward the outside of the accommodating chamber 101, at which point the pressure inside the accommodating chamber 101 gradually decreases, ultimately achieving a balance in the pressure difference between the inside and outside of the accommodating chamber 101. When the air pressure inside the accommodating chamber 101 is lower than the air pressure outside the accommodating chamber 101, the elastic membrane 401 may expand toward the inside of the accommodating chamber 101, at which point the pressure inside the accommodating chamber 101 gradually increases, ultimately achieving a balance in the pressure difference between the inside and outside of the accommodating chamber 101. Of course, if Figure 8 As shown, the elastic membrane 401 can be disposed on the outer side of the accommodating cavity 101, or on the inner side of the accommodating cavity 101. This description will not be repeated here. It should be noted that the shape of the elastic membrane 401 can be rectangular, diamond-shaped, circular, etc., as long as it covers the fourth gas port 400 and ensures sealing. This is not limited here.
[0055] In the above embodiment, the elastic membrane 401 and the airbag 300 can be made of rubber material or latex material, so that they have good elastic deformation ability and toughness.
[0056] It should be noted that, in the above embodiments, the sleeve 200, the airbag 300 and the elastic membrane 401 can be provided independently, or they can be provided in combination according to actual needs. For example, the airbag 300 and the sleeve 200 can be provided on the box body 100, or the airbag 300 and the elastic membrane 401 can be provided on the box body 100, etc. This article does not limit this.
[0057] The present application also discloses a power converter, including an electronic device and a protective device. The protective device is the protective device disclosed in the above embodiment, and therefore has all the technical effects of the above protective devices, which will not be described in detail herein. Among them, the power converter can be an inverter, a converter, etc., which is not limited herein. The electronic device is located inside the protective device to provide better protection for the electronic device. It should be noted that the electronic device may include power semiconductors, control and drive circuits, sensors, detection elements, filters, capacitors, etc.
[0058] The terms "first," "second," and so on in the specification, claims, and drawings of this application are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements and may include steps or elements that are not listed.
[0059] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present application. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A protective device, characterized in that: include: A box body (100) is provided, wherein the box body (100) defines a housing cavity (101) for accommodating electronic devices, wherein the inner side and the outer side of the housing cavity (101) are connected via a pressure transfer channel, wherein the pressure transfer channel is used to transfer pressure from a high-pressure side to a low-pressure side so as to balance the pressure inside and outside the housing cavity (101), and the pressure transfer channel and the housing cavity (101) are enclosed to form a sealed space.
2. The protective device according to claim 1, characterized in that The housing (100) comprises a sleeve (200), the sleeve (200) restricting a cavity (201), and a first air port (202) and a second air port (203) are respectively provided at both ends of the sleeve (200), the first air port (202) being in communication with the inner side of the accommodating cavity (101), and the second air port (203) being in communication with the outer side of the accommodating cavity (101), so as to form the pressure transfer channel.
3. The protective device according to claim 2, characterized in that: A movable sealing member (204) is provided in the cavity (201) of the sleeve (200), and the sealing member (204) is in contact with the inner wall of the sleeve (200).
4. The protective device according to claim 3, characterized in that: At least one end of the sleeve (200) is connected to the sealing member (204) via a resetting elastic member (205).
5. The protective device according to claim 1, characterized in that The box body (100) includes an airbag (300), the airbag (300) limits an airbag cavity (301), the airbag cavity (301) is provided with a third air port (302), and the third air port (302) is used to communicate with the inner side or the outer side of the accommodating cavity (101) to form the pressure transfer channel.
6. The protective device according to claim 5, characterized in that: The airbag (300) is located inside the accommodating cavity (101), and the third air port (302) is in communication with the outside of the accommodating cavity (101); When the pressure inside the accommodating cavity (101) is greater than the pressure outside the accommodating cavity (101), the airbag cavity (301) contracts and deforms; When the pressure inside the accommodating cavity (101) is lower than the pressure outside the accommodating cavity (101), the airbag cavity (301) expands and dilates.
7. The protective device according to claim 5, characterized in that: The airbag (300) is located outside the accommodating cavity (101), and the third air port (302) is in communication with the inside of the accommodating cavity (101); When the pressure inside the accommodating cavity (101) is greater than the pressure outside the accommodating cavity (101), the airbag cavity (301) expands and dilates; When the pressure inside the accommodating cavity (101) is lower than the pressure outside the accommodating cavity (101), the airbag cavity (301) contracts and deforms.
8. The protective device according to claim 5, characterized in that: A plurality of support rings (303) are arranged at intervals in the airbag cavity (301).
9. The protective device according to claim 1, characterized in that: The box body (100) includes a fourth air port (400), the fourth air port (400) being connected to the inner side and the outer side of the accommodating cavity (101) to form the pressure transfer channel, and an elastic membrane (401) is provided at the position of the fourth air port (400), and the elastic membrane (401) is used to expand toward the lower pressure side.
10. A power converter, characterized in that: The protective device comprises an electronic device and the protective device according to any one of claims 1 to 9, wherein the electronic device is located inside the protective device.