Power conversion device

Abstract

A power conversion device includes a housing having an internal space in which a power conversion component is built, a cavity disposed apart from the internal space of the housing, a filter coupled to a side of the cavity and configured to prevent moisture and foreign matter from entering the cavity from the outside, and a valve disposed between the internal space of the housing and the cavity to block communication between the internal space of the housing and the outside, and configured to be selectively opened and closed by a pressure difference between the internal space of the housing and the cavity.

Description

Technical Field

[0001] Various embodiments of the present invention relate to a power conversion device that can ensure the durability of the power conversion component by adding a valve between the power conversion component and the external environment that opens under pressure conditions (e.g., only under specific or predetermined pressure conditions). Background Technology

[0002] Inverters and other power conversion devices are units that perform AC / DC conversion, DC / AC conversion, and power control functions, and contain various power conversion components. When these built-in power conversion components are operating, heat is generated during the power conversion process, which raises the internal temperature of the device, leading to increased pressure and the expulsion of air to the outside. Conversely, when the power conversion components are not operating, the internal temperature and pressure decrease, allowing air to flow in from the outside.

[0003] With repeated air intake and exhaust, temperature fluctuations inside the device can cause condensation. That is, moisture evaporated due to the high internal temperature is cooled by incoming outside air, forming condensate. This condensate can damage power conversion components and surrounding circuitry, potentially leading to device performance degradation and malfunctions.

[0004] Condensation can negatively impact the reliability and durability of electronic devices and may threaten the operational safety of power conversion components. Therefore, a technology that effectively manages temperature and pressure variations within power conversion devices and prevents damage to power conversion components by inhibiting condensation can help improve the reliability of power conversion devices and enhance (e.g., optimize) the performance of the overall system.

[0005] Various methods have been tried to address condensation problems in various types of power conversion devices, but most methods are limited in functionality or cost, thus restricting their practicality. For example, attempts have been made to control temperature and pressure through air circulation systems, but such systems incur additional installation and maintenance costs and increase the size of the power conversion device. Furthermore, other attempted methods do not respond immediately to temperature changes and have limited ability to prevent condensation before it occurs.

[0006] To overcome these limitations, there is an increasing demand for effective technologies to control the temperature and pressure inside power conversion devices.

[0007] The above description of the background art is intended to enhance the understanding of the background of the present invention. Summary of the Invention

[0008] Therefore, the present invention aims to provide a power conversion device with enhanced waterproof and dustproof effects, which is opened by installing a one-way valve or a two-way valve (e.g., only) in response to the pressure in the internal space with the power conversion component or the cavity communicating with the outside reaching a pressure condition not lower than (e.g., a specific or preset) to allow fluid to flow between the two, thereby preventing damage to the power conversion component.

[0009] This invention is not limited to the technical problems described herein, and those skilled in the art to which this invention pertains may understand other technical problems not mentioned in the description herein.

[0010] To achieve the objectives of this invention, the power conversion device of this invention may include: a housing having a power conversion component built into its internal space; a cavity being configured to be separated from the internal space of the housing; a filter being attached to the side (e.g., one side) of the cavity and configured to prevent moisture and foreign matter from entering the cavity from the outside; and a valve being disposed between the internal space of the housing and the cavity to block communication between the internal space of the housing and the outside, and the valve being configured to selectively open and close based on the pressure difference between the internal space of the housing and the cavity.

[0011] In the power conversion device of the present invention, the valve may include at least one elastomer, wherein the elastomer may be configured to operate under different conditions depending on the pressure difference between the internal (e.g., inner) space of the housing and the cavity, thereby enabling temporary communication between the internal space of the housing and the outside.

[0012] In the power conversion device of the present invention, the valve can be configured to be operated by the elastic force of an elastomer, such that when the elastic force is greater than the pressure difference, the elastomer expands and closes the valve; and when the elastic force is less than the pressure difference, the elastomer contracts and opens the valve.

[0013] In the power conversion device of the present invention, the valve may include a plurality of valves, each of which causes fluid to flow (e.g., only) in one direction; and when each valve is different from the others, it causes the fluid to flow in different directions respectively.

[0014] In the power conversion device of the present invention, each of the plurality of valves is provided with an elastic body, wherein each elastic body contracts in a different direction, thereby causing each of the plurality of valves to open in a different direction.

[0015] In the power conversion device of the present invention, multiple valves may include a first valve and a second valve. The first valve and the second valve respectively include a first elastic body and a second elastic body. The first elastic body and the second elastic body can contract in different directions, thereby causing the first valve and the second valve to open in different directions.

[0016] In the power conversion device of the present invention, in response to the opening of the first valve, fluid can flow from the cavity to the internal space of the housing; and in response to the opening of the second valve, fluid can flow from the internal space of the housing to the cavity.

[0017] In the power conversion device of the present invention, the first valve opens in response to the pressure difference between the internal space of the cavity and the housing being greater than the elastic force of the first elastic body; and the second valve opens in response to the pressure difference being greater than the elastic force of the second elastic body.

[0018] In the power conversion device of the present invention, since the elastic forces of the first elastic body and the second elastic body can be different from each other, the opening pressure difference between the first valve and the second valve can also be different.

[0019] In the power conversion device of the present invention, the valve can be an integrated valve that can be opened in both directions. The integrated valve has multiple elastic bodies inside, and each of the multiple elastic bodies has a different contraction direction.

[0020] In the power conversion device of the present invention, the integrated valve may be provided with an inlet elastomer and an outlet elastomer. In response to the contraction of the inlet elastomer, fluid may flow from the cavity to the internal space of the housing; and in response to the contraction of the outlet elastomer, fluid may flow from the internal space of the housing to the cavity.

[0021] In the power conversion device of the present invention, the introduced elastomer and the discharged elastomer can contract according to the pressure difference between the internal space of the housing and the cavity, and since the introduced elastomer and the discharged elastomer have different elastic forces, the pressure difference when the introduced elastomer and the discharged elastomer contract is also different.

[0022] In the power conversion device of the present invention, in response to the pressure difference between the internal space of the cavity and the housing being greater than the elastic force of the introduced elastic body, the introduced elastic body can contract, allowing fluid to flow into the internal space of the housing; and in response to the pressure difference being greater than the elastic force of the discharged elastic body, the discharged elastic body contracts, allowing fluid to flow into the cavity.

[0023] In the power conversion device of the present invention, a regulator is provided inside the integrated valve. The side of the regulator (e.g., one side) contacts the inlet elastomer fixed to the integrated valve. The other side of the regulator can be connected to the cavity, and the outlet elastomer can be contained inside the regulator.

[0024] In the power conversion device of the present invention, the regulator may further include: an adjustment orifice disposed in a direction facing the internal space of the housing, such that fluid in the integrated valve can enter and exit the regulator; and an adjustment ball disposed inside the regulator, in contact with the adjustment orifice, which opens and closes the adjustment orifice by introducing or discharging the contraction of an elastomer, wherein the end of the discharging elastomer (e.g., one end) is connected to the adjustment ball, and the other end is fixed inside the regulator.

[0025] In the power conversion device of the present invention, in response to the fluid being introduced into the regulator within the integrated valve, the regulating ball can apply pressure to the discharge elastomer, causing the discharge elastomer to contract.

[0026] In the power conversion device of the present invention, the adjustment orifice is closed by the adjustment ball in response to the contraction of the introduced elastomer; and the adjustment orifice is opened in response to the contraction of the discharged elastomer.

[0027] In the power conversion device of the present invention, in response to the pressure difference between the internal space of the cavity and the housing being less than the elastic force of the discharge elastomer, the adjustment orifice is closed by the adjustment ball; and in response to the pressure difference between the internal space of the cavity and the housing being greater than the elastic force of the discharge elastomer, the discharge elastomer contracts and the adjustment orifice opens.

[0028] In the power conversion device of the present invention, the filter can be connected to the outside, and as outside air flows into the cavity through the filter, a pressure difference can be generated between the internal space of the housing and the cavity.

[0029] In the power conversion device of the present invention, the cavity may be located inside the housing, the filter may be attached to the externally facing side of the cavity (e.g., one side), and the valve may be attached to the other side of the cavity facing the internal space of the housing.

[0030] As described above, the power conversion device of the present invention can prevent condensation (e.g., the phenomenon), thereby preventing damage to the power conversion components, and the durability of the power conversion components is improved due to the improved waterproof and dustproof capabilities.

[0031] The improvements (e.g., effects) that can be obtained by the present invention are not limited to those described above, and other improvements not mentioned can be understood by those skilled in the art from the description herein. Attached Figure Description

[0032] The above and other objects, features and advantages of the present invention can be understood through detailed description and in conjunction with the accompanying drawings, wherein:

[0033] Figure 1 This is a diagram illustrating a power conversion device according to one embodiment;

[0034] Figure 2 It shows the basis Figure 1 An enlarged view of part A of the power conversion device in the illustrated embodiment;

[0035] Figure 3 This is a diagram illustrating a power conversion device according to another embodiment. Detailed Implementation

[0036] In describing the embodiments disclosed in this specification, a detailed description of the relevant known art may be omitted if it is determined that such a description would obscure the spirit of the embodiments disclosed herein. Furthermore, the accompanying drawings are intended to aid in understanding the embodiments disclosed herein; the technical concepts disclosed herein are not limited by the drawings, and variations included in the features of the invention are to be understood as including equivalents or alternatives. The following disclosure is not intended to limit one to the forms described or a particular field of the invention, and various alternative embodiments and modifications of the invention are contemplated as possible, whether or not (e.g., explicitly) set forth herein or implied. Those skilled in the art will recognize that the form and details of the invention can be changed.

[0037] The present invention has been described with reference to various embodiments. However, as will be understood by those skilled in the art, the various embodiments disclosed herein can be modified or implemented in various other ways without departing from the characteristics of the invention. Therefore, the following description should be considered exemplary and intended to teach those skilled in the art how to make and use the various embodiments. The forms of disclosure shown and described herein should be understood as representative embodiments. Equivalent elements, materials, processes, or steps may replace those representative examples and descriptions herein. When words such as “comprising,” “including,” “incorporated,” “consisting of,” “having,” and “are” are used in the description of the invention, they are to be understood as non-proprietary expressions, that is, these words can be understood to allow the inclusion of objects, parts, or elements not expressly listed. Furthermore, references to the singular can be understood to include references to the plural.

[0038] Furthermore, the various embodiments disclosed herein should be viewed in an illustrative and explanatory manner and should not be construed as limiting the scope of the invention. Any reference to engagement (e.g., attachment, fixation, bonding, connection, etc.) is used to facilitate understanding of the invention and does not constitute any limitation on the location, orientation, or purpose of any component or method disclosed herein. Therefore, engagement references can be interpreted broadly when they are present. Moreover, these engagement references do not imply that two or more elements are directly connected to each other. Any numerical terms, such as “first,” “second,” “third,” “primary,” “secondary,” “main,” or any other general or numerical terms, should be considered as identifiers that aid in understanding the various components, configurations, variations, or modifications of the invention and do not imply any limitation on the components, configurations, variations, or modifications, nor any limitation regarding their order or priority. That is, these expressions can be used to describe various components, but the components are not limited by these expressions. The purpose of using these expressions is to distinguish one component from another.

[0039] The terms “module” and “component” used to describe parts in the following text are used interchangeably for the convenience of writing instructions and do not have different meanings or functions in themselves.

[0040] When a component is "connected" or "linked" to another component, it can be understood as directly connecting or linking it to that other component, although there may be other components in between. On the other hand, when it is said that a component is "directly connected" or "directly linked" to another component, it can be understood as there are no other components in between.

[0041] Furthermore, any configuration described herein may include any number or variety of components. These components may include any combination of the features described herein and may be arranged in various configurations as described herein. The structural concepts and component arrangements of the present invention, as well as their use and operation, can be applied in any combination to any number of embodiments, and not just the specific embodiments described herein. Embodiments including various features and arrangements will be described below with reference to the accompanying drawings.

[0042] Figure 1 This is a diagram illustrating a power conversion device according to one embodiment. Figure 2 It shows the basis Figure 1 An enlarged view of section A of the power conversion device in the illustrated embodiment, and Figure 3 This is a diagram illustrating a power conversion device according to another embodiment.

[0043] The various embodiments disclosed in this specification will now be described in detail with reference to the accompanying drawings. Regardless of the reference numerals, (e.g., the same or) similar parts are labeled with the same reference numerals, and repeated descriptions thereof are omitted.

[0044] Inside power conversion devices such as inverters, temperature and pressure rise due to the heat generated by the power conversion components during operation, causing air to be expelled. Conversely, when these components are not operating, air is drawn in. During this process, temperature changes can trigger condensation, which can damage the power conversion components and circuitry, leading to performance degradation and malfunctions. Therefore, effective temperature and pressure management techniques can help prevent condensation and maintain the reliability and performance of the device.

[0045] To ensure the durability of the power conversion components inside the power conversion device, it is necessary to guarantee waterproof and dustproof performance, and (e.g., simultaneously) prevent condensation inside the power conversion device by limiting fluid exchange with the outside. To this end, the present invention provides a method that minimizes condensation by allowing fluid to flow between the power conversion components and the outside only when the pressure reaches or exceeds (e.g., a specific) threshold.

[0046] Meanwhile, the following uses an inverter as an example to illustrate power conversion devices, but in addition to inverters, various types of power conversion devices can be used, such as converters, rectifiers, uninterruptible power supplies (UPS), voltage regulators and similar devices.

[0047] The power conversion device of the present invention can be applied to vehicles. For example, in the power system of an electric vehicle, an inverter is a device that converts direct current stored in a battery into alternating current, which can drive the vehicle motor and improve vehicle performance through efficient power conversion. The advantage of these inverters is that they are protected from temperature changes and vibrations that may occur in the vehicle's driving environment, and in particular, they can prevent condensation caused by changes in heat and pressure inside the inverter.

[0048] Temperature and pressure in the vehicle environment can change rapidly, which can cause condensation inside power conversion devices such as inverters. For example, when the external temperature drops sharply and the internal temperature of the inverter is relatively high, moisture may condense on cold surfaces, forming condensate. Condensation can also occur due to the flow of cooling water within the power conversion device. This condensate can damage power conversion components and circuitry, ultimately leading to performance degradation or even malfunction of the power conversion device. Therefore, temperature and pressure management technologies that minimize condensate generation are beneficial for power conversion devices used in vehicles.

[0049] Therefore, when the power conversion device of the present invention is applied to a vehicle, the temperature and pressure difference inside the inverter can be managed by a design including: a cavity 300 that isolates the internal space 120 of the housing 100 from the outside; and a valve 700 that controls the fluid flow between the internal space 120 and the outside air. Specifically, when the pressure difference inside the inverter increases beyond (e.g., a specific) level, the airflow between the outside and the internal space 120 can be controlled by selectively opening and closing the valve 700. This prevents excessive moisture condensation and safely protects the inverter. Furthermore, the valve 700 can automatically open and close to prevent the pressure difference from becoming (e.g., excessively) large, thereby controlling the airflow to maintain pressure balance inside the inverter.

[0050] Furthermore, vibrations and shocks in the vehicle environment also need to be considered. These external factors can damage the internal components of the inverter, so in addition to waterproofing and dustproofing, a durable design is also important. The filter 500 and valve 700 constructed in this invention operate effectively even in various driving environments in a vehicle, thereby preventing foreign objects or moisture from entering the inverter and maintaining the durability of the power conversion components.

[0051] Therefore, the following description will focus on inverters suitable for vehicles as (e.g., representative) examples to aid in understanding the invention. Besides inverters, it can be applied to various power conversion devices, and in addition to vehicles, it can be used in various fields such as power generation systems, backup power systems, high-speed railways, ships, and aircraft.

[0052] Referring to the accompanying drawings, a power conversion device applicable to various fields, including vehicles, is described in detail.

[0053] First, refer to Figure 1 The power conversion apparatus according to various embodiments of the present invention will be described.

[0054] In one embodiment, the power conversion device may include a housing 100, a cavity 300, a filter 500, and a valve 700. The housing 100 may house the power conversion components within an internal space 120 and may include a cavity 300 separated from the internal space 120 of the housing 100. Furthermore, the filter 500 may be integrated into a side (e.g., one side) of the cavity 300 to prevent moisture and foreign matter from entering the cavity 300 from the outside. Additionally, the valve 700 may be disposed between the internal space 120 of the housing 100 and the cavity 300 to block communication between the internal space 120 of the housing 100 and the outside, and may selectively open and close based on the pressure difference between the internal space 120 of the housing 100 and the cavity 300.

[0055] Meanwhile, the filter 500 described in the embodiment is a membrane filter, which removes foreign objects by filtering the material through micropores in the form of a thin membrane. When the waterproof or dustproof performance of the internal space 120 of the housing 100 can be ensured by preventing a large amount of moisture or foreign objects from entering the cavity 300, various types of filters other than membrane filters, such as cartridge filters and bag filters, can also be used.

[0056] Furthermore, the valve 700 described in the embodiment is a bypass valve that allows air to pass through in one direction (e.g., only) when the pressure reaches a threshold not lower than (e.g., a specific) threshold. However, in addition to bypass valves, various types of valves, such as sliding gate valves, rotary disc valves, and valves that use electrical signals, can also be used.

[0057] In such Figure 1 In the illustrated embodiment, the internal space 120 of the built-in power conversion component can be disposed within the housing 100, and a cavity 300 connecting the internal space 120 and the external environment can be provided. Additionally, as... Figure 1As shown in section A, the filter 500 can be disposed on the left side near the outside, and the valve 700 can be disposed between the cavity 300 and the internal space 120. However, this configuration is merely exemplary, and various types of power conversion components and cavities 300 can be considered for the layout within the power conversion device, and the filter 500 and valve 700 can also be combined with the cavity 300 in different positions, or disposed between the internal space 120 of the housing 100 and the cavity 300.

[0058] In one embodiment, the valve 700 disposed between the internal space 120 of the housing 100 and the cavity 300 may include at least one of elastomers 722 and 742, 764 and 766. In this case, the elastomers 722, 742, 764 and 766 may be configured to operate under different conditions depending on the pressure difference between the internal space 120 of the housing 100 and the cavity 300, thereby temporarily communicating the internal space of the housing 100 with the outside. Furthermore, foreign objects or large amounts of moisture from the outside cannot enter the power conversion component, so foreign objects or moisture can be initially filtered by the filter 500, and then the communication between the cavity 300 and the internal space 120 is blocked by the valve 700 for secondary filtration.

[0059] However, in some embodiments, when air is (e.g., completely) blocked from entering the internal space 120 of the housing 100 containing the built-in power conversion component, the pressure difference between the inside and outside of the housing 100 may be too large, posing a potential risk of damaging seals and the like, and making it difficult to ensure waterproof and dustproof performance. Simultaneously, when the internal space 120 of the housing 100 (where the power conversion component is located) is freely connected to the outside, condensation or foreign matter may directly damage the power conversion component. However, when the connection is (e.g., completely) blocked, the seals may be damaged, making it even more difficult to ensure waterproof and dustproof performance. Therefore, it is necessary to determine an appropriate pressure difference level and waterproof and dustproof performance.

[0060] Therefore, in this embodiment, the aforementioned problem can be solved by using a valve 700 comprising at least one of elastomers 722, 742, 764, and 766. More specifically, the valve 700 is configured to be operated by the elastic force of at least one of the elastomers 722, 742, 764, and 766. When the elastic force is greater than the pressure difference between the internal space 120 of the housing 100 and the cavity 300, at least one of the elastomers 722, 742, 764, and 766 expands to close the valve 700, and when the elastic force is less than the pressure difference, at least one of the elastomers 722, 742, 764, and 766 contracts to open the valve 700. By controlling the elastic force of at least one of the elastomers 722, 742, 764, and 766 contained in the valve 700, a suitable pressure difference can be maintained between the internal space 120 of the housing 100 and the cavity 300 communicating with the outside, preventing excessive moisture or foreign matter from entering.

[0061] Next, refer to Figure 2 A one-way (e.g., one-direction) valve 700 according to various embodiments of the present invention will be described.

[0062] In one embodiment, valve 700 may be configured as a plurality of valves, each of which allows fluid to flow in (e.g., only) one direction. Since each valve allows fluid to flow in (e.g., only) one direction, different valves can be arranged in different directions to ensure different flow directions. This design maintains pressure balance between the internal space 120 of housing 100 and cavity 300.

[0063] In one embodiment, as described above, elastomers 722, 742, 764, and 766 are individually disposed in each of the plurality of valves. The contraction directions of each elastomer 722, 742, 764, and 766 may be different from each other, such that each valve opens in a different direction. To improve application efficiency, a bypass valve may be used. The plurality of valves may be arranged between the cavity 300 and the internal space 120, enabling them to open toward both the cavity 300 and the internal space 120 of the housing 100.

[0064] Specifically, in one embodiment, valve 700 may include a first valve 720 and a second valve 740, wherein the first valve 720 and the second valve 740 respectively include a first elastic body 722 and a second elastic body 742. The first elastic body 722 and the second elastic body 742 can contract in different directions, thereby causing the opening directions of the first valve 720 and the second valve 740 to be different from each other.

[0065] In one embodiment, when the first valve 720 is open, fluid can flow from the cavity 300 to the internal space 120 of the housing 100. Conversely, when the second valve 740 is open, fluid can flow from the internal space 120 of the housing 100 to the cavity 300.

[0066] In this embodiment, whether the first valve 720 and the second valve 740 open depends on the pressure difference between the internal space 120 of the housing 100 and the cavity 300. Specifically, when the pressure difference between the cavity 300 and the internal space 120 of the housing 100 is greater than the elastic force of the first elastic body 722, the first valve 720 opens, allowing fluid to flow from the cavity 300 to the internal space 120 of the housing 100. Similarly, when the pressure difference is greater than the elastic force of the second elastic body 742, the second valve 740 opens, allowing fluid to flow from the internal space 120 of the housing 100 to the cavity 300.

[0067] In this embodiment, since the elastic forces of the first elastomer 722 and the second elastomer 742 are different, the opening pressure differentials of the first valve 720 and the second valve 740 are also different. Specifically, the elastomers 722, 742, 764, and 766 used in this invention can be springs, and the opening force due to the pressure differential can be adjusted by setting different spring constants for each spring. For example, when the elastic modulus of the first elastomer 722 is set to be greater than that of the second elastomer 742, it may be more difficult for fluid to flow from the cavity 300 to the internal space 120 of the housing 100 than to flow from the internal space 120 of the housing 100 to the cavity 300. In this case, since the elastic coefficient of the first elastomer 722 is set to be greater than that of the second elastomer 742, the pressure differential required to open the first valve 720 (e.g., as needed) can be greater than the pressure differential required to open the second valve 740 (e.g., as needed).

[0068] The following will refer to Figure 3 An integrated valve 760 according to various embodiments of the present invention will be described.

[0069] In embodiments, in addition to (e.g., one-way) valve 700, an integral valve 760 may be used as a valve suitable for the present invention. The integral valve 760 is a valve that can be opened in (two) opposite directions and may include a plurality of elastomers 722, 742, 764, and 766. Each of the elastomers 722, 742, 764, and 766 may have a different direction of contraction.

[0070] In one embodiment, the integrated valve 760 may include an inlet elastomer 766 and an outlet elastomer 764. The inlet elastomer 766 may be an elastomer configured to contract when fluid is introduced into the internal space 120 of the housing 100, while the outlet elastomer 764 may be an elastomer configured to contract when fluid is discharged from the internal space 120 of the housing 100. Accordingly, when the inlet elastomer 766 contracts, fluid may flow from the cavity 300 to the internal space 120 of the housing 100, and when the outlet elastomer 764 contracts, fluid may flow from the internal space 120 of the housing 100 to the cavity 300.

[0071] In this embodiment, both the inlet elastomer 766 and the outlet elastomer 764 contract according to the pressure difference between the internal space 120 of the housing 100 and the cavity 300. The inlet elastomer 766 and the outlet elastomer 764 may have different elastic forces, and therefore the pressure difference when they contract may also be different. Similar to the above-described (e.g., one-way) valve 700, in the case of using an integrated valve 760, different elastic coefficients can be set for the multiple elastomers 722, 742, 764, and 766 used internally, thereby setting appropriate pressure values ​​for the fluid introduced into or discharged from the internal space 120 of the housing 100.

[0072] For example, in one embodiment, when the elastic modulus of the introduced elastomer 766 is greater than that of the discharged elastomer 764, it is more difficult to introduce fluid into the internal space 120 of the housing 100 than to discharge fluid from the internal space 120. By adjusting the elastic moduli of the elastomers 722, 742, 764, and 766 in this way, the waterproof or dustproof performance of the power conversion components located in the internal space 120 of the housing 100 can be ensured, and the pressure balance inside and outside the housing 100 can be maintained.

[0073] In one embodiment, when the pressure difference between the cavity 300 and the internal space 120 of the housing 100 is greater than the elastic force of the introduced elastomer 766, the introduced elastomer 766 contracts, and fluid flows into the internal space 120 of the housing 100. Similarly, when the pressure difference between the cavity 300 and the internal space 120 of the housing 100 is greater than the elastic force of the discharged elastomer 764, the discharged elastomer 764 contracts, and fluid flows into the cavity 300.

[0074] In the implementation method, such as Figure 3 As shown, the integrated valve 760 has an internal regulator 761 that can contact an inlet elastomer 766 fixed to the integrated valve 760. Specifically, one end of the inlet elastomer 766 is fixed to the side of the integrated valve 760 near the internal space 120 of the housing 100, and the other end can contact the regulator 761. In addition, the side (e.g., one side) of the regulator 761 can contact the inlet elastomer 766 fixed to the integrated valve 760, and the other side can be connected to the cavity 300, while the outlet elastomer 764 can be integrated into the interior of the regulator 761.

[0075] In one embodiment, the regulator 761 may include an adjustment orifice 762, an adjustment ball 763, and a discharge elastomer 764. The adjustment orifice 762 of the regulator 761 is positioned facing the internal space 120 of the housing 100, allowing fluid within the integrated valve 760 to flow into and out of the regulator 761. Furthermore, depending on whether the inlet elastomer 766 or the outlet elastomer 764 contracts, the adjustment ball 763 can open or close the adjustment orifice 762 by contacting it. Additionally, the outlet elastomer 764 is connected to the adjustment ball 763 on one side (e.g., one side) and fixed to the interior of the regulator 761 on the other side, allowing the adjustment ball 763 to apply pressure to the outlet elastomer 764 in the contraction direction when fluid flows into the interior of the regulator 761 from the outside.

[0076] In this embodiment, when the introduced elastomer 766 contracts, fluid flows from the cavity 300 to the internal space 120 of the housing 100. As the regulator 761 contracts as a whole, fluid can be introduced into the internal space 120 of the housing 100 through the space between the regulator 761 and the integrated valve 760. In this case, since the discharged elastomer 764 does not contract, the regulating ball 763 can remain in the closed regulating port 762 state.

[0077] In this embodiment, when the discharge elastomer 764 contracts, fluid flows into the cavity 300. Therefore, fluid from the internal space 120 of the housing 100 flows into the integrated valve 760 and further into the regulator 761 through the regulating hole 762, allowing the regulating ball 763 to pressurize the discharge elastomer 764. In this case, fluid can flow into the space between the regulator 761 and the integrated valve 760 and into the cavity 300.

[0078] In this embodiment, when the pressure difference between the cavity 300 and the internal space 120 of the housing 100 is less than the elastic force of the discharge elastomer 764, the adjusting hole 762 is closed by the adjusting ball 763. Conversely, when the pressure difference is greater than the elastic force of the discharge elastomer 764, the discharge elastomer 764 contracts to open the adjusting hole 762.

[0079] Although the invention has been shown and described in conjunction with various embodiments, it will be clear to those skilled in the art that various modifications and alterations can be made to the invention without departing from the technical features of the invention as defined in the appended claims.

Claims

1. A power conversion device, comprising: A housing having an internal space, wherein a power conversion component is built into the internal space; The cavity is separated from the internal space of the housing; A filter, integrated into the side of the cavity, is configured to prevent moisture and foreign matter from entering the cavity from the outside; and A valve is disposed between the interior space of the housing and the cavity to block communication between the interior space of the housing and the outside, and the valve is configured to selectively open and close by means of a pressure difference between the interior space of the housing and the cavity.

2. The power conversion device according to claim 1, wherein, The valve includes: At least one elastomer, The elastomer is configured to operate under different conditions depending on the pressure difference between the internal space of the housing and the cavity, thereby temporarily connecting the internal space of the housing with the outside.

3. The power conversion device according to claim 2, wherein, The valve is configured to operate by the elastic force of the elastomer, such that when the elastic force is greater than the pressure difference, the elastomer expands and closes the valve; and when the elastic force is less than the pressure difference, the elastomer contracts and opens the valve.

4. The power conversion device according to claim 2, wherein, The valve includes: Multiple valves, Wherein, when each of the plurality of valves is identical, each valve causes the fluid to flow in the same direction; and when each of the plurality of valves is different from one another, each valve causes the fluid to flow in different directions.

5. The power conversion device according to claim 4, wherein, Each of the plurality of valves is provided with an elastic body, wherein each elastic body contracts in a different direction, thereby causing each of the plurality of valves to open in a different direction.

6. The power conversion device according to claim 4, wherein, The plurality of valves includes: A first valve and a second valve, the first valve including a first elastic body and the second valve including a second elastic body, wherein the first elastic body and the second elastic body contract in different directions, thereby causing the first valve and the second valve to open in different directions.

7. The power conversion device according to claim 6, wherein, In response to the opening of the first valve, fluid flows from the cavity to the interior space of the housing; and in response to the opening of the second valve, fluid flows from the interior space of the housing to the cavity.

8. The power conversion device according to claim 6, wherein, The first valve opens in response to a pressure difference between the internal space of the cavity and the housing being greater than the elastic force of the first elastomer; and the second valve opens in response to a pressure difference being greater than the elastic force of the second elastomer.

9. The power conversion device according to claim 8, wherein, Because the elastic forces of the first elastomer and the second elastomer are different, the opening pressure difference between the first valve and the second valve is also different.

10. The power conversion device according to claim 3, wherein, The valve is an integrated valve that can be opened in both directions. The integrated valve has multiple elastic bodies inside, and each of the multiple elastic bodies has a different contraction direction.

11. The power conversion device according to claim 10, wherein, The integrated valve is provided with an inlet elastomer and an outlet elastomer, wherein, in response to the contraction of the inlet elastomer, fluid flows from the cavity to the interior space of the housing; and in response to the contraction of the outlet elastomer, fluid flows from the interior space of the housing to the cavity.

12. The power conversion device according to claim 11, wherein, The introducing elastomer and the discharging elastomer contract according to the pressure difference between the internal space of the housing and the cavity, and because the introducing elastomer and the discharging elastomer have different elastic forces, the pressure difference when the introducing elastomer and the discharging elastomer contract is also different.

13. The power conversion device according to claim 11, wherein, In response to the pressure difference between the cavity and the interior space of the housing being greater than the elastic force of the introduced elastomer, the introduced elastomer contracts, causing fluid to flow into the interior space of the housing; Furthermore, in response to the pressure difference being greater than the elastic force of the discharge elastomer, the discharge elastomer contracts, causing fluid to flow into the cavity.

14. The power conversion device according to claim 13, wherein, The integrated valve has a regulator inside, one side of which contacts the inlet elastomer fixed to the integrated valve, the other side of which is connected to the cavity, and the outlet elastomer is contained inside the regulator.

15. The power conversion device according to claim 14, wherein, The regulator also includes: An adjustment port, positioned facing the interior space of the housing, allows fluid within the integrated valve to enter and exit the regulator; and An adjusting ball, disposed inside the regulator and in contact with the adjusting orifice, opens and closes the adjusting orifice by the contraction of the introducing elastomer or the discharging elastomer. One end of the discharge elastomer is connected to the regulating ball, and the other end is fixed inside the regulator.

16. The power conversion device according to claim 15, wherein, In response to fluid being introduced into the regulator within the integrated valve, the regulating ball applies pressure to the discharge elastomer, causing the discharge elastomer to contract.

17. The power conversion device according to claim 15, wherein, In response to the contraction of the introduced elastomer, the adjusting orifice is closed by the adjusting ball; and in response to the contraction of the discharged elastomer, the adjusting orifice is opened.

18. The power conversion device according to claim 15, wherein, In response to the pressure difference between the internal space of the cavity and the housing being less than the elastic force of the discharge elastomer, the adjustment hole is closed by the adjustment ball; In response to the pressure difference between the cavity and the internal space of the housing being greater than the elastic force of the discharge elastomer, the discharge elastomer contracts and the adjustment hole opens.

19. The power conversion device according to claim 1, wherein, The filter is in communication with the outside, and as outside air flows into the cavity through the filter, a pressure difference is generated between the interior space of the housing and the cavity.

20. The power conversion device according to claim 1, wherein, The cavity is located inside the housing, the filter is attached to the outer side of the cavity, and the valve is attached to the other side of the cavity facing the interior space of the housing.

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