A frequency converter shell for a variable frequency compressor and a variable frequency compressor

Abstract

This utility model belongs to the field of variable frequency compressor technology, specifically disclosing a variable frequency compressor housing and a variable frequency compressor. The variable frequency compressor housing of this utility model adopts a multi-faceted hollow design, with several heat dissipation vents on the front and sides of the second housing. Simultaneously, heat sinks are exposed externally, covering the heat dissipation vents on the front and sides of the second housing. This not only achieves heat dissipation for the heat-generating components on the back of the variable frequency board but also improves the heat dissipation efficiency for the heat-generating components on the front, thereby meeting the comprehensive heat dissipation needs of the heat-generating components on both sides of the variable frequency board and improving the overall heat dissipation performance of the variable frequency compressor. Furthermore, the first, second, and third housings of this utility model together form a stable receiving cavity. Placing the variable frequency board in the receiving cavity allows for multi-faceted heat dissipation through a single installation, thus simplifying the installation process.

Description

Technical Field

[0001] This utility model belongs to the field of variable frequency compressor technology, and relates to a variable frequency compressor housing and a variable frequency compressor. Background Technology

[0002] As a core control component in the operation of a variable frequency compressor, the stable operation of the frequency converter is crucial. Frequency converters generate considerable heat during operation, especially when equipped with DC or AC reactors and the frequency converter board is enclosed in a housing. This often leads to excessively high inverter temperatures. The failure rate of the frequency converter increases with rising temperatures, and its lifespan is correspondingly reduced. To ensure the performance and reliability of the frequency converter, an effective heat dissipation structure is required for the frequency converter board.

[0003] In recent years, with the widespread application of frequency converter technology globally, different regions have presented varying requirements for the heat dissipation of frequency converters. Inverters in general regions often employ built-in aluminum fin heat dissipation solutions. However, in wide-voltage regions, due to more demanding operating conditions, higher requirements are placed on the heat dissipation capabilities of frequency converters, leading to a preference for externally thickened aluminum fins to enhance heat dissipation. However, existing planar heat sink designs primarily focus on dissipating heat from components on the back of the frequency converter board, resulting in relatively low efficiency in dissipating heat from components on the front. This makes it difficult to meet the comprehensive heat dissipation needs of components on both sides of the frequency converter board, directly impacting the overall heat dissipation performance of the frequency converter.

[0004] Therefore, the structure of the inverter housing for variable frequency compressors in the existing technology needs further improvement. Utility Model Content

[0005] The purpose of this utility model is to provide a variable frequency compressor housing and a variable frequency compressor to meet the heat dissipation requirements of the heat-generating components on both sides of the variable frequency board, thereby improving the heat dissipation effect of the variable frequency compressor.

[0006] To achieve the above objectives, this utility model adopts the following technical solution:

[0007] A variable frequency compressor housing includes a first housing, a second housing, a third housing, and heat sinks;

[0008] The first housing and the second housing are connected to each other at opposite ends, and the third housing is disposed on the side of the first housing and the second housing. The first housing, the second housing and the third housing together enclose a cavity for mounting the frequency converter board.

[0009] The front and sides of the second housing have several perforated heat dissipation vents;

[0010] The heat sink is located on the outside of the second housing and covers the heat dissipation port.

[0011] Preferably, the heat sink has several raised surfaces on the side facing the heat dissipation port.

[0012] Preferably, thermally conductive adhesive is used to fill the space between the raised surface and the frequency converter board.

[0013] Preferably, the inner wall of the first housing is provided with a plurality of support columns for abutting against the upper surface of the inverter board, and the support columns protrude from the inner wall of the first housing.

[0014] Preferably, the second housing has a placement plane for the frequency converter board that abuts against the lower surface of the frequency converter board on the side facing the receiving cavity.

[0015] Preferably, the second housing is provided with a snap-fit ​​support and a positioning support on the side facing the receiving cavity for cooperating with the slotted position of the frequency converter board, and the snap-fit ​​support and the positioning support are distributed at intervals;

[0016] The snap-on support is used to snap onto the edge of one side of the inverter board.

[0017] Preferably, the opposite ends of the first housing and the second housing are connected to each other by a snap fastener.

[0018] Preferably, the third housing is connected to the side of the first housing by screws, and the third housing is connected to the side of the second housing by snap-fit.

[0019] Preferably, the third housing is provided with a cable outlet, and the second housing forms a cable harness outlet at the corresponding position of the cable outlet. The cable harness outlet and the cable outlet match to form a channel for the cable harness to pass through.

[0020] A variable frequency compressor, wherein the variable frequency compressor is provided with the aforementioned variable frequency compressor inverter housing.

[0021] Compared with the prior art, this utility model has the following advantages:

[0022] As described above, this utility model relates to a variable frequency drive (VFD) housing for a variable frequency compressor. When applied to a VFD compressor, the VFD housing of this utility model adopts a multi-faceted hollow design. Several heat dissipation vents are provided on the front and sides of the second housing, while heat sinks are exposed externally, covering the heat dissipation vents on the front and sides of the second housing. This not only achieves heat dissipation for the heat-generating components on the back of the VFD board but also improves the heat dissipation efficiency for the heat-generating components on the front, thereby meeting the comprehensive heat dissipation needs of the heat-generating components on both sides of the VFD board and improving the overall heat dissipation performance of the VFD. Furthermore, the first, second, and third housings of this utility model together form a stable receiving cavity, which is easy to install. Placing the VFD board in the receiving cavity allows for multi-faceted heat dissipation through a single installation, and simplifies the installation process. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is a perspective view of the inverter housing for the variable frequency compressor in this embodiment of the present invention;

[0025] Figure 2 This is a front view of the inverter housing for the variable frequency compressor in this embodiment of the present invention;

[0026] Figure 3 This is a left view of the inverter housing for the variable frequency compressor in this embodiment of the present invention;

[0027] Figure 4 This is a right view of the inverter housing for the variable frequency compressor in this embodiment of the present invention;

[0028] Figure 5 This is a top view of the inverter housing for the variable frequency compressor in this embodiment of the present invention;

[0029] Figure 6 This is a bottom view of the inverter housing for the variable frequency compressor in this embodiment of the present invention;

[0030] Figure 7 This is a front view of the first housing in an embodiment of the present utility model;

[0031] Figure 8 The three-dimensional representation of the first shell in this utility model embodiment Figure 1 ;

[0032] Figure 9 The three-dimensional representation of the first shell in this utility model embodiment Figure 2 ;

[0033] Figure 10 The three-dimensional representation of the first shell in this utility model embodiment Figure 3 ;

[0034] Figure 11 This is a front view of the second housing in an embodiment of the present invention;

[0035] Figure 12 This is a perspective view of the second housing in an embodiment of the present utility model;

[0036] Figure 13 The three-dimensional representation of the third shell in this utility model embodiment Figure 1 ;

[0037] Figure 14 The three-dimensional representation of the third shell in this utility model embodiment Figure 2 ;

[0038] Figure 15 The three-dimensional representation of the third shell in this utility model embodiment Figure 3 ;

[0039] Figure 16 This is a perspective view of the heat sink in an embodiment of the present utility model;

[0040] Wherein, 1-first housing, 101-screw hole support, 102-pre-installed buckle, 103-first reinforcing rib, 104-stepped surface, 105-bracket fixing structure, 106-bracket mating structure, 107-water guide channel, 108-chamfered structure, 109-heat sink fixing structure, 110-support, 111-matting buckle structure;

[0041] 2-Second housing, 201-Snap fastener, 202-Post support with snap fastener, 203-Wire harness outlet, 204-Heat dissipation hole, 205-Heat dissipation fin mounting slot, 206-Inverter board placement plane, 207-Matching buckle, 208-Positioning post, 209-Heat dissipation vent;

[0042] 3-Third housing, 301-Cable outlet, 302-Wire clamping post, 303-Screw hole, 304-Second reinforcing rib;

[0043] 4-Heat sink, 401-Hole, 402-Raised surface, 403-Bent structure. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0045] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0046] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0047] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0049] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0050] Example 1

[0051] like Figures 1 to 6 As shown, in this embodiment, the inverter housing for the variable frequency compressor includes a first housing 1, a second housing 2, a third housing 3, and a heat sink 4.

[0052] The first housing 1 and the second housing 2 are connected to each other at opposite ends, and the third housing 3 is disposed on the side of the first housing 1 and the second housing 2. The first housing 1, the second housing 2 and the third housing 3 together enclose a cavity for mounting the frequency converter board.

[0053] exist Figure 11 In the direction shown, the side of the second housing 2 facing the observation direction is taken as the front of the second housing 2, and the side of the second housing 2 parallel to the observation direction is taken as the side of the second housing 2. Several hollow heat dissipation holes 209 are provided on the front and side of the second housing 2.

[0054] Heat sink 4 is disposed on the outside of the second housing 2, and the heat sink 4 covers the heat dissipation vents 209 on the front and sides of the second housing 2, thereby achieving multi-faceted heat dissipation. Domestic and European standard inverter boards have lower heat dissipation requirements, while wide voltage inverter boards have higher heat dissipation requirements. The use of external heat sink 4, which has a more flexible installation method, can meet the different heat dissipation requirements of inverters in different regions while ensuring compatibility of the solution.

[0055] The first housing 1, the second housing 2, the third housing 3, and the heat sink 4 are described in detail below.

[0056] The opposite ends of the first housing 1 and the second housing 2 are preferably connected to each other by a snap-fit. For example... Figures 7 to 10 As shown, a stepped surface 104 is provided on the side of the first housing 1, which is used to engage with the snap fastener 201 of the second housing 2. The first housing 1 also has a mating snap fastener structure 111, which abuts against the mating snap fastener 207 of the second housing 2. The first housing 1 also has a chamfered structure 108, which is used for a clearance fit with the second housing 2, facilitating the installation of the interlocking structure formed by the mating snap fastener structure 111 and the mating snap fastener 207. The opposite ends of the first housing 1 and the second housing 2 are interlocked with each other through the interlocking structure and the snap fastener structure, saving the screw connection process.

[0057] The first housing 1 is provided with a heat sink fixing structure 109, which is used to fit with the second housing 2 and the bending structure 403 of the heat sink 4 with a clearance, so that the heat sink 4 can be close to the heat-generating components.

[0058] The third housing 3 is connected to the side of the first housing 1 by screws. Specifically, the first housing 1 is provided with a pre-installed buckle 102, which is used for pre-installation before the first housing 1 and the third housing 3 are screwed together, and helps to position the third housing 3 and the first housing 1 for installation. The first housing 1 is provided with a screw hole support 101, which is used to engage with screws. The third housing 3 and the first housing 1 are connected by screws and screw hole support 101.

[0059] To prevent the inverter board from shaking and causing noise or other adverse effects, the inner wall of the first housing 1 is provided with a plurality of support pillars 110 for abutting against the upper surface of the inverter board. The support pillars 110 protrude from the inner wall of the first housing 1. In this embodiment, the first housing 1 is provided with two support pillars 110, which are used to directly contact the surface of the inverter board.

[0060] The first housing 1 is also provided with a bracket fixing structure 105, which is used for relay bracket screw connection. The bracket fixing structure 105 adopts a hole-post structure. The through hole of the hole-post structure facilitates compatibility with screws of different lengths and avoids hole-post cracking. The first housing 1 is also provided with a bracket mating structure 106, which is used for clearance mating of the relay bracket.

[0061] In addition, a first reinforcing rib 103 is provided on the first housing 1. The first reinforcing rib 103 provided around the bracket fixing structure 105 is used to strengthen the structural strength of the screw hole stress surface and prevent stress hole cracking. The vertical first reinforcing rib 103 provided on the side of the first housing 1 is used to strengthen the structural strength of the outer shell plane and optimize vibration noise.

[0062] In addition, a water guide groove 107 is provided on the first housing 1. The function of the water guide groove 107 is to drain the water that seeps into the inverter housing and prevent the components from failing due to water ingress.

[0063] like Figures 11 to 12 As shown, in this embodiment, the second housing 2 is provided with two snaps 201 and one mating snap 207, which are used for installation with the stepped surface 104 and the mating snap structure 111 of the first housing 1, respectively.

[0064] For the installation of the inverter board, the second housing 2 is provided with a snap-on support 202 and a positioning support 208 on the side facing the receiving cavity for cooperating with the slotted position of the inverter board. The snap-on support 202 and the positioning support 208 are distributed at intervals. The snap-on support 202 is used to snap onto the edge of one side of the inverter board, and the snap-on structure on the positioning support 208 can hold the inverter board in place to ensure proper installation.

[0065] The second housing 2 is also provided with a frequency converter board placement plane 206 on the side facing the receiving cavity for abutting against the lower surface of the frequency converter board. The frequency converter board placement plane 206 is preferably located at the four corners of the side of the second housing 2 facing the receiving cavity. Its function is to support the bottom surface of the frequency converter board at the four corners and ensure a safe distance between the components and component pins on the bottom surface of the frequency converter board and the second housing 2.

[0066] In addition, the second housing 2 is provided with a heat sink mounting groove 205, which is used to fix the bent structure 403 of the heat sink 4. The heat dissipation vent 209 on the second housing 2 is used to increase heat dissipation. The heat sink 4 covers the heat dissipation vent 209, and thermally conductive adhesive is filled between the heat sink 4 and the inverter board. The second housing 2 is also provided with component heat dissipation holes 204, which are used to locate the positions where thermally conductive adhesive is added.

[0067] In addition, the second housing 2 is provided with a wire harness outlet 203, which is used to cooperate with the outlet 301 of the third housing 3, and its function is to fix the outlet position of the wire.

[0068] like Figures 13 to 15 As shown, the third housing 3 is installed with the screw hole support 101 of the first housing 1 through the screw hole 303, and is further secured by the pre-installed buckle 102.

[0069] The third housing 3 is provided with a cable outlet 301. The second housing 2 forms a cable harness outlet 203 at the position corresponding to the cable outlet 301. The cable harness outlet 203 and the cable outlet 301 match to form a channel for the cable harness to pass through. The cable harness outlet 203 and the cable outlet 301 cooperate to ensure the cable outlet space. The third housing 3 is also provided with a clamping post 302. In this embodiment, there are two clamping posts 302. The clamping posts 302 are used to clamp the input cable harness to ensure that the cable harness is not displaced under force and to ensure that the terminals of the frequency converter board are not affected by force.

[0070] In addition, to increase the strength of the surface structure, a second reinforcing rib 304 is provided on the third shell 3.

[0071] like Figure 16 As shown, the heat sink 4 is secured and positioned by engaging with the corresponding screw holes in the second housing 2 via holes 401. The heat sink 4 is provided with a bending structure 403, which is designed to align with the heat sink mounting slot 205 in the second housing 2, facilitating close contact with the heat-generating components on the front of the inverter board and ensuring adequate heat dissipation.

[0072] In addition, several raised surfaces 402 are provided on the side of the heat sink 4 facing the heat dissipation port 209. Thermally conductive adhesive is filled between the raised surfaces 402 and the inverter board. The function of the raised surfaces 402 is to contact the thermally conductive adhesive and the IGBT heat dissipation components on the back of the inverter board to ensure sufficient heat dissipation.

[0073] In this utility model, the inverter housing for a variable frequency compressor comprises a first housing 1, a second housing 2, and a third housing 3, which together form a stable receiving cavity. The second housing 2 is assembled to the first housing 1 using a fixing clip, and the third housing 3 is connected to the side of the second housing 2 via clips. The third housing 3 is assembled to the first housing 1 using pre-installed clips 102 and screws. The second housing 2 is assembled to the heat sink 4 using screws and a spacing fit, ensuring ease of installation while increasing structural stability.

[0074] The inverter board inside the inverter housing is fixed in direct contact with the lower surface of the inverter board via four inverter board placement planes 206 of the second housing 2. The two support pillars 110 of the first housing 1 are in direct contact with the upper surface of the inverter board. Simultaneously, the snap-fit ​​structure of the snap-fit ​​support pillars 202 of the second housing 2 is in direct contact with the upper surface of the inverter board, ensuring that the inverter board has no vertical movement space. The inverter board inside the inverter housing, through its four-sided spacing with the second housing 2, and the snap-fit ​​support pillars 202 and positioning support pillars 208, ensures that the inverter board has no horizontal movement space, thus guaranteeing structural stability.

[0075] To meet the heat dissipation requirements of the heat-generating components on both sides of the inverter board, the heat sink 4 covers the heat dissipation vents 209 on the front and sides of the second housing 2, thereby improving the heat dissipation efficiency for the heat-generating components on the front of the inverter. The second housing 2 and the heat sink 4 can achieve multi-faceted heat dissipation through a single installation, simplifying the operation process. Preferably, the side of the heat sink 4 facing the heat dissipation vent 209 is provided with several raised surfaces 402, and thermally conductive adhesive is filled between the raised surfaces 402 and the inverter board. The inverter housing of this utility model adopts a multi-faceted hollow design, with the heat sink 4 exposed externally while being connected to the internal components for heat dissipation through thermally conductive adhesive, achieving a good heat dissipation effect.

[0076] This utility model provides an effective protective cover solution for the inverter housing of a variable frequency compressor. By bending and punching holes in the heat sink 4, the heat dissipation area is increased. Simultaneously, the protruding parts of the holes, i.e., the raised surfaces 402, are close to the heat-generating components, thereby improving heat dissipation. The bending structure 403 of the heat sink 4, in conjunction with the spacing between the cover formed by the first housing 1, the second housing 2, and the third housing 3, achieves multi-faceted heat dissipation, satisfying both installation convenience and uniformity. This utility model's inverter housing not only effectively protects the inverter board and meets relevant electrical safety inspection requirements, but also optimizes the inverter's heat dissipation.

[0077] Example 2

[0078] A variable frequency compressor is disclosed, comprising the inverter housing described in Embodiment 1. The inverter housing in this compressor adopts a multi-faceted perforated design, with several heat dissipation vents on the front and sides of the second housing. Exposed heat sinks cover the heat dissipation vents on the front and sides of the second housing, enabling heat dissipation not only for the heat-generating components on the back of the inverter but also for the heat-generating components on the front, thus meeting the comprehensive heat dissipation needs of the heat-generating components on both sides of the inverter board and improving the overall heat dissipation performance of the inverter. Furthermore, the first, second, and third housings of this invention together form a stable receiving cavity. Placing the inverter board within this cavity allows for multi-faceted heat dissipation through a single installation, thereby simplifying the installation process.

[0079] The present embodiment has now been described in detail with reference to the accompanying drawings. Based on the above description, those skilled in the art should have a clear understanding of the inverter housing for the variable frequency compressor and the variable frequency compressor of this utility model. Of course, the above description is only a preferred embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made under the inventive concept of this utility model using the content of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model and should be protected by this utility model.

Claims

1. A frequency inverter housing for a variable frequency compressor, characterized by, It includes a first housing, a second housing, a third housing, and a heat sink; The first housing and the second housing are connected to each other at opposite ends, and the third housing is disposed on the side of the first housing and the second housing. The first housing, the second housing and the third housing together enclose a cavity for mounting the frequency converter board. The front and sides of the second housing have several perforated heat dissipation vents; The heat sink is located on the outside of the second housing and covers the heat dissipation port.

2. The inverter housing for a variable frequency compressor according to claim 1, characterized in that, The heat sink has several raised surfaces on the side facing the heat dissipation port.

3. The inverter housing for a variable frequency compressor according to claim 2, characterized in that, Thermally conductive adhesive is used to fill the space between the raised surface and the inverter board.

4. The inverter housing for a variable frequency compressor according to claim 1, characterized in that, The inner wall of the first housing is provided with multiple support columns for abutting against the upper surface of the inverter board, and the support columns protrude from the inner wall of the first housing.

5. The inverter housing for a variable frequency compressor according to claim 1, characterized in that, The second housing has a placement plane for the inverter board that abuts against the lower surface of the inverter board on the side facing the receiving cavity.

6. The inverter housing for a variable frequency compressor according to claim 1, characterized in that, The second housing is provided with a snap-fit ​​support and a positioning support on the side facing the receiving cavity, which are used to mate with the slotted position of the frequency converter board. The snap-fit ​​support and the positioning support are distributed at intervals. The snap-on support is used to snap onto the edge of one side of the inverter board.

7. The inverter housing for a variable frequency compressor according to claim 1, characterized in that, The opposite ends of the first and second housings are connected to each other by a snap-fit.

8. The inverter housing for a variable frequency compressor according to claim 1, characterized in that, The third housing is connected to the side of the first housing by screws, and the third housing is connected to the side of the second housing by snap-fit.

9. The inverter housing for a variable frequency compressor according to claim 1, characterized in that, The third housing has a cable outlet, and the second housing forms a cable harness outlet at the corresponding position of the cable outlet. The cable harness outlet and the cable outlet match to form a channel for the cable harness to pass through.

10. A variable frequency compressor, characterized in that, The variable frequency compressor is provided with a variable frequency inverter housing as described in any one of claims 1 to 9.

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