CN217272125U - Converter and shell thereof - Google Patents
Converter and shell thereof Download PDFInfo
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- CN217272125U CN217272125U CN202220839903.9U CN202220839903U CN217272125U CN 217272125 U CN217272125 U CN 217272125U CN 202220839903 U CN202220839903 U CN 202220839903U CN 217272125 U CN217272125 U CN 217272125U
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Abstract
The utility model discloses a converter and a shell thereof, wherein the shell is provided with a cavity for accommodating electric parts, the shell is provided with an air inlet valve and an air outlet valve, the air inlet valve and the air outlet valve are of a one-way valve structure, the air inlet valve is used for conducting the air path from the outside to the cavity in one way, and the air outlet valve is used for conducting the air path from the cavity to the outside in one way; the air inlet valve is connected with the shell in an airtight mode, the air outlet valve is connected with the shell in an airtight mode, the air inlet valve is used for filling inert gas into the cavity, and the inert gas is flame retardant gas. Through structural optimization, the damage to the electric parts in the shell can be avoided in the switching operation of a high-temperature environment and a low-temperature environment, and the safety performance is improved.
Description
Technical Field
The utility model relates to a converter technical field especially relates to a converter and casing thereof.
Background
Taking the DC/DC converter as an example, the assembly of the housing is performed in a clean room, and the gas present in the housing after the assembly is air. When switching between low-temperature and high-temperature environments, for example, after the end of the offline test, the DC/DC converter is transferred to a warehouse with a lower air temperature for storage, or in some extreme conditions of cold and heat shock, a small amount of moisture contained in the air in the DC/DC converter housing may be condensed on the surface of the electrical parts inside the housing due to the sudden temperature change, thereby causing short circuit or damage to the electrical parts.
In addition, a small amount of moisture in the air inside the housing can cause oxidation, aging, or corrosion of critical electrical components over time.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a converter and casing thereof through configuration optimization, can avoid the damage to the internal electric part of casing in the switching operation of high temperature environment and low temperature environment, improves the security performance.
In order to solve the technical problem, the utility model provides a housing of a converter, the housing has a cavity for accommodating electrical components, the housing is provided with an air inlet valve and an air outlet valve, the air inlet valve and the air outlet valve are both of one-way valve structures, the air inlet valve is used for conducting the air path from the outside to the cavity in one way, and the air outlet valve is used for conducting the air path from the cavity to the outside in one way; the air inlet valve is connected with the shell in an airtight mode, the air outlet valve is connected with the shell in an airtight mode, the air inlet valve is used for filling inert gas into the cavity, and the inert gas is flame retardant gas.
The utility model provides a shell of converter, install admission valve and air outlet valve that are the check valve structure on the shell, in other words, admission valve can only one-way conduction external to the passageway between the cavity of shell, only allow the external gas to flow to the cavity direction of shell promptly, do not allow the gas in the cavity to flow to the external direction, air outlet valve can only one-way conduction cavity of shell to the passageway between the external world, only allow the gas in the cavity to flow to the external direction promptly, do not allow the external gas to flow to the cavity direction; the air inlet valve and the air outlet valve are connected with the shell in an air-tight manner so as to ensure the air tightness of a cavity of the shell and ensure the reliable working environment of the electrical components arranged in the shell; the air inlet valve is used for filling inert gas into the cavity of the shell, and the inert gas is flame-retardant gas; in practical application, after the shell of the converter is assembled, the shell can be filled with inert and flame-retardant gas by using the air inlet valve and the air outlet valve, and original air in the shell is exhausted outside, namely the shell is filled with the inert and flame-retardant gas, so that the problem of potential safety hazard of short circuit or damage of electrical components caused by condensation of water vapor in air is solved and the safety performance of the converter is improved in the switching operation of a high-temperature environment and a low-temperature environment because no air exists in the shell, and meanwhile, the problems of oxidation, aging or corrosion of the electrical components in the shell can be avoided because the shell has no oxygen or moisture; because the inert gas is also flame retardant gas, the possibility of fire caused by the failure of the electrical components in the shell is reduced.
The shell of the converter is configured to be in an opening state when the external air pressure is greater than the air pressure in the cavity by a first set value; the air outlet valve is configured to be in an open state when the air pressure in the cavity is larger than the external air pressure by a second set value.
According to the shell of the converter, the value range of the first set value or the second set value is 0.08-0.12 of atmospheric pressure.
In the case of the transducer as described above, the first set value is specifically 0.1 atm, or the second set value is specifically 0.1 atm.
The casing of the converter, the one-way valve structure comprises a valve body, a valve core and an elastic piece, the valve body is provided with an air channel which can be communicated with the outside and the chamber, the air channel is provided with a valve opening part, and the valve core closes the valve opening part under the action of the elastic piece.
The shell of the converter, the one-way valve structure further comprises a sealing cover, and the sealing cover is detachably connected with the valve body and used for sealing an end opening of the air passage communicated with the outside.
The casing of the converter, the casing has a mounting hole for mounting the one-way valve structure, the valve body passes through the mounting hole, part of the valve body is positioned in the cavity, and the rest part of the valve body is positioned outside the casing; and the valve body is hermetically connected with the hole wall of the mounting hole.
In the case of the inverter as described above, the inert gas is carbon dioxide.
The utility model also provides a converter, include the casing and locate electrical component in the casing, the casing be above-mentioned arbitrary the casing.
Since the housing has the technical effects, the inverter comprising the housing also has corresponding technical effects, and the discussion is not repeated here.
The converter as described above is a DC/DC converter.
Drawings
Fig. 1 is a schematic structural diagram of a casing of a DC/DC converter provided by the present invention;
FIG. 2 is a cross-sectional view of the engagement of the one-way valve with the shell side wall of the housing in an embodiment.
Description of reference numerals:
a housing 10, a housing top wall 11, a housing side wall 12;
an inlet valve 20, an outlet valve 30;
Detailed Description
In order to make the technical field better understand the solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and the detailed description.
Without loss of generality, the casing structure of the DC/DC converter is described below as an example, and it is understood that in practical applications, other converters with similar problems may also adopt the casing structure.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a casing of a DC/DC converter according to the present invention.
In this embodiment, the housing 10 of the DC/DC converter has a chamber that accommodates electrical components. In the illustrated example, the housing 10 is of a generally rectangular parallelepiped configuration and includes a housing top wall 11, a housing bottom wall disposed opposite the housing top wall 11, and four housing side walls 12 connected between the housing top wall 11 and the housing bottom wall. The housing 10 has a cavity for accommodating electrical components, and its wall may be provided with related accessories such as an interface for connecting internal electrical components with external related components, and it is specifically referred to the existing DC/DC converter design, and it is not considered as the point of the invention herein, and it will not be described in detail here.
In this embodiment, all the inlet valves 20 and the outlet valves 30 are mounted on the housing 10, and the inlet valves 20 and the outlet valves 30 are of a one-way valve structure; the air inlet valve 20 is used for conducting an air path from the outside to the cavity of the housing 10 in a one-way manner, that is, the air inlet valve 20 is arranged to only allow the outside air to flow toward the cavity of the housing 10, and not to allow the air in the cavity of the housing 10 to flow toward the outside, and the air outlet valve 30 is arranged to conduct a path from the cavity of the housing 10 to the outside in a one-way manner, that is, the air outlet valve 30 is arranged to only allow the air in the cavity of the housing 10 to flow toward the outside, and not to allow the outside air to flow toward the cavity of the housing 10.
The inlet valve 20 and the outlet valve 30 are hermetically connected to the housing 10, and the inlet valve 20 is used for filling the cavity of the housing 10 with inert gas, which is also a flame retardant gas.
After the housing 10 provided in this embodiment is assembled, the intake valve 20 and the exhaust valve 30 may be used to fill the housing 10 with the inert and flame-retardant gas, that is, the intake valve 20 and the exhaust valve 30 are opened, and the intake valve 20 fills the housing 10 with the inert and flame-retardant gas while the exhaust valve 30 discharges the air in the original housing 10, so that the inert and flame-retardant gas is finally filled in the housing 10, therefore, in the switching action between the high-temperature environment and the low-temperature environment, because there is no air in the housing 10, the potential safety hazard problem of short circuit or damage of the electrical components in the housing 10 due to the condensation of water vapor in the air is avoided, the safety performance of the DC/DC converter is improved, and meanwhile, because there is no oxygen and no water in the housing 10, the problems of oxidation, aging, or corrosion of the electrical components in the housing 10 can also be avoided; because the inert gas is also a flame retardant gas, the possibility of fire due to failure of the electrical components inside the housing 10 is reduced.
In practical applications, the step of filling the housing 10 with the inert and flame-retardant gas may be performed after assembling the electrical components with the housing 10 and before performing the complete machine aging test. Of course, other steps in the assembly process may be performed according to the actual application requirements.
In a specific embodiment, the air inlet valve 20 is configured to be in an open state when the ambient air pressure is greater than a first set value of the air pressure in the cavity of the housing 10, and the air outlet valve 30 is configured to be in an open state when the ambient air pressure in the cavity of the housing 10 is greater than a second set value of the ambient air pressure.
Specifically, the first set value and the second set value may be in the same range, for example, both of the first set value and the second set value are 0.08 to 0.12 atm, and more specifically, both of the first set value and the second set value may be set to 0.1 atm. In application, the first setting value and the second setting value may be set according to requirements, and may be set identically or differently, and are not limited to the foregoing range.
In a specific embodiment, the check valve structures of the inlet valve 20 and the outlet valve 30 may be the same or different, and may be selected from check valves in different existing forms.
In this embodiment, as shown in figure 1, the inlet valve 20 and the outlet valve 30 are mounted on the same shell side wall 12 of the shell 10 to facilitate valve operation and inflation. It will be appreciated that the inlet valve 20 and the outlet valve 30 may be mounted on the top wall 11 or the bottom wall of the housing, or both may be mounted on different walls, depending on the design layout requirements.
Referring to fig. 2, fig. 2 is a cross-sectional view of a fitting portion of a check valve and a shell side wall 12 of a housing 10.
As shown in fig. 2, the check valve structure provided in this embodiment includes a valve body 41, an elastic member 42, and a valve core 43, wherein the valve body 41 has an air passage 411, after the valve body 41 is mounted on the shell side wall 12 of the housing 10, the air passage 411 can communicate the cavity of the housing 10 with the outside, the air passage 411 has a valve port portion 412, the valve core 43 can close the valve port portion 412 under the action of the elastic member 42 to block the air passage 411, i.e., close the passage between the cavity of the housing 10 and the outside, and when the air pressure acts on the valve core 43 to overcome the elastic force of the elastic member 42, the valve core 43 can open the valve port portion 412 to communicate the air passage 411, so as to communicate the outside with the cavity of the housing 10.
Referring to fig. 2, it can be understood that the valve port 412 divides the air passage 411 into two parts, the first part is communicated with the outside, the second part is communicated with the chamber of the housing 10, and the valve port 412 is used as a structure for communicating the two air passage parts, and the two air passage parts can be communicated or cut off under the opening and closing action of the valve core 43.
In the orientation shown in fig. 2, assuming that the space below the shell side wall 12 is the side of the cavity of the housing 10, the one-way valve shown in fig. 2 is the air inlet valve 20, and when the inflator is communicated with the port of the air inlet valve 20, the one-way valve can be inflated, and when the inflation pressure is greater than the elastic force of the elastic member 42, the valve core 43 can be pushed to move downwards against the elastic force, so that the air can be inflated into the cavity of the housing 10; assuming that the space below the housing sidewall 12 is the outside and the space above the housing sidewall 12 is the chamber side of the housing 10, the one-way valve shown in fig. 2 is the air outlet valve 30, and when the pressure in the chamber of the housing 10 is greater than the elastic force of the elastic member 42, the valve element 43 is pushed to move downwards against the elastic force, so that the air in the chamber of the housing 10 is exhausted.
Obviously, during assembly, the installation direction is determined according to the function of the one-way valve, and the description is omitted here.
During specific setting, a mounting hole matched with the valve body 41 is formed in the shell side wall 12 of the shell 10, the valve body 41 can be arranged through the mounting hole, one part of the valve body 41 is located in the cavity, and the other part of the valve body 41 is located outside the shell 10; the valve body 41 may be connected to the mounting hole in a threaded sealing manner, and of course, other airtight connections may be adopted, for example, a sealing ring is disposed between the valve body 41 and the mounting hole.
Specifically, the check valve structure may further include a sealing cover (not shown in the figure), which is detachably connected to the valve body 41, and is used for sealing an end opening of the air passage 411 communicating with the outside, so as to prevent external impurities from entering the air passage 411 when the valve is not used, and thus the performance of the valve is not affected.
In practical application, the inert gas filled in the cavity of the housing 10 is carbon dioxide, and the carbon dioxide is also a flame retardant gas, so that the carbon dioxide is easy to obtain and low in cost; in addition, nitrogen dioxide can also provide better low temperature insulation for the housing 10.
Of course, other convenient inert and flame-retardant gases may be used in the actual setting.
In this embodiment, the housing 10 is filled with an inert and flame retardant gas in the following manner:
firstly, opening an air inlet valve 20 and an air outlet valve 30 which are arranged on a shell 10, namely opening the sealing covers of the valves; the air charging device and the air inlet valve 20 are installed, the shell 10 is charged through the air inlet valve 20, carbon dioxide gas with set air pressure and set temperature can be charged at fixed flow during air charging, for example, the carbon dioxide gas is charged at the flow of 100L/min and the air temperature is 50 ℃ under 1.25 atmospheric pressures, and the air charging is stopped after the air charging is continued for set time, for example, after 10 min; closing the inlet valve 20 and the outlet valve 30, i.e., installing a cover for each valve; finally, the airtightness of the intake valve 20 and the exhaust valve 30 is checked.
In practical applications, relevant parameters of the filling gas can be adjusted according to needs, and are not limited to the above.
In addition to the housing 10, the present invention further provides a converter, which includes the housing 10, and other structures of the converter can refer to the existing design, which is not described herein again.
In a specific application, the converter can be a DC/DC converter or other converters with similar problems.
The converter and the housing thereof provided by the present invention have all been described in detail above. The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the method and its core ideas of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the scope of the appended claims.
Claims (10)
1. The shell of the converter is characterized in that the shell is provided with a cavity for accommodating electrical components, the shell is provided with an air inlet valve and an air outlet valve, the air inlet valve and the air outlet valve are of a one-way valve structure, the air inlet valve is used for conducting air paths from the outside to the cavity in a one-way mode, and the air outlet valve is used for conducting air paths from the cavity to the outside in a one-way mode; the air inlet valve is connected with the shell in an airtight mode, the air outlet valve is connected with the shell in an airtight mode, the air inlet valve is used for filling inert gas into the cavity, and the inert gas is flame-retardant gas.
2. The transducer housing of claim 1 wherein the inlet valve is configured to be open when ambient air pressure is greater than a first set point air pressure within the chamber; the air outlet valve is configured to be in an open state when the air pressure in the cavity is larger than the external air pressure by a second set value.
3. The casing of claim 2, wherein the first set point or the second set point is in a range of 0.08 to 0.12 atm.
4. A housing for a transformer according to claim 3, characterized in that the first set point is in particular 0.1 atmosphere or the second set point is in particular 0.1 atmosphere.
5. The casing of the inverter according to any one of claims 1 to 4, wherein the one-way valve structure includes a valve body having an air passage capable of communicating with the outside and the chamber, a valve body having a valve port portion, and an elastic member, the valve body closing the valve port portion by the action of the elastic member.
6. The transducer housing of claim 5 wherein the one-way valve structure further comprises a cover removably attached to the valve body for closing off an end opening of the air passage communicating with the environment.
7. The housing of the transducer of claim 5 wherein the housing has a mounting hole for mounting the one-way valve structure, the valve body passing through the mounting hole, a portion of the valve body being located within the chamber and the remainder being located outside the housing; and the valve body is hermetically connected with the hole wall of the mounting hole.
8. A housing for a transducer according to any one of claims 1 to 4 wherein the inert gas is carbon dioxide.
9. An inverter comprising a housing and electrical components disposed within the housing, wherein the housing is according to any one of claims 1 to 8.
10. The converter according to claim 9, wherein the converter is a DC/DC converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220839903.9U CN217272125U (en) | 2022-04-11 | 2022-04-11 | Converter and shell thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220839903.9U CN217272125U (en) | 2022-04-11 | 2022-04-11 | Converter and shell thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217272125U true CN217272125U (en) | 2022-08-23 |
Family
ID=82875217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220839903.9U Active CN217272125U (en) | 2022-04-11 | 2022-04-11 | Converter and shell thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217272125U (en) |
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2022
- 2022-04-11 CN CN202220839903.9U patent/CN217272125U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee after: WEICHAI POWER Co.,Ltd. Patentee after: Weichai New Energy Power Technology Co.,Ltd. Address before: 261061 Shandong city in Weifang province Fu hi tech Industrial Development Zone, East Street No. 197 Patentee before: WEICHAI POWER Co.,Ltd. Patentee before: Weichai New Energy Technology Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |