CN216123378U - Electrical device and frequency conversion device - Google Patents
Electrical device and frequency conversion device Download PDFInfo
- Publication number
- CN216123378U CN216123378U CN202122480880.5U CN202122480880U CN216123378U CN 216123378 U CN216123378 U CN 216123378U CN 202122480880 U CN202122480880 U CN 202122480880U CN 216123378 U CN216123378 U CN 216123378U
- Authority
- CN
- China
- Prior art keywords
- heat dissipation
- heat
- air
- board
- heat sink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses an electrical device and a frequency conversion device, wherein the electrical device comprises: the heat dissipation device comprises a shell, a heat dissipation substrate and a power plate, wherein the shell is provided with an accommodating cavity, and the accommodating cavity is provided with a heat dissipation port; the heat dissipation substrate is fixed on the shell and used for plugging a heat dissipation port of the accommodating cavity; the power board is fixed on the shell and is positioned in the accommodating cavity; the main power device on the power board is exposed at the heat dissipation opening and is attached to the heat dissipation substrate. The technical scheme of the utility model aims to avoid the problem of difficult heat dissipation of the power plate caused by the blockage of the air channel.
Description
Technical Field
The utility model relates to the technical field of electrical equipment, in particular to electrical equipment and frequency conversion equipment.
Background
Traditional electrical equipment is in the in-process of using, the heat that the power board (the circuit board that is provided with the main power device) in the electrical equipment cavity can produce is more, in order to dispel the heat to the main power device in the cavity, the design has the wind channel in the cavity, except the radiator in the wind channel, still there may be business turn over wind baffle, the fan, the aviation baffle, sealing part and cable etc. in case there is the pollutant (like cotton fibre, dust, piece etc.) to get into in the wind channel, it discharges it from circulation system by the wind channel hardly, finally can pile up in electrical equipment's wind channel is inside, and manual cleaning operation is also difficult. On the other hand, the accumulated pollutants affect the air exchange in the air duct, so that the heat dissipation of the main power device is difficult, and finally, the product failure is caused, and the service life of the product is affected.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model mainly aims to provide electrical equipment and frequency conversion equipment, and aims to avoid the problem that a main power device on a power board is difficult to dissipate heat due to blockage of an air duct.
In order to solve the above-described problems, an electrical device according to an embodiment of the present invention includes: the heat dissipation device comprises a shell, a heat dissipation substrate and a power plate, wherein the shell is provided with an accommodating cavity, and the accommodating cavity is provided with a heat dissipation port; the heat dissipation substrate is fixed on the shell and used for plugging a heat dissipation port of the accommodating cavity; the power board is fixed on the shell and is positioned in the accommodating cavity; the main power device on the power board is exposed at the heat dissipation opening and is attached to the heat dissipation substrate.
In an embodiment of the present invention, the electrical apparatus further includes a heat sink disposed on a surface of the heat dissipation substrate facing away from the power board.
In an embodiment of the present invention, the heat sink is a gear shaping heat sink, a tooth relief heat sink, a profile heat sink, a heat pipe heat sink or a liquid cooling heat sink.
In an embodiment of the present invention, the main power device on the power board is coated with a heat conductive silicone grease, and is attached to the heat dissipation substrate.
In an embodiment of the present invention, the electrical device further includes a driving board, the driving board is disposed perpendicular to the power board and electrically connected to the power board; and the casing is provided with a heat radiation piece for radiating the drive board.
In an embodiment of the present invention, the heat sink includes an air guiding cover and a fan, the driving board is fixed on a side wall of the casing, the air guiding cover is disposed on the driving board to form an air channel by enclosure, and the air guiding cover is used for covering the heating device on the driving board in the air channel; the side wall of the air guide cover is provided with an air inlet and an air outlet which are communicated with the air duct; the air inlet area is communicated with the air inlet, the air outlet area is communicated with the air outlet, and the fan is arranged in the air channel and used for introducing air flow from the air inlet and leading out air flow from the air outlet.
In an embodiment of the present invention, a sealing rubber strip is disposed between the wind scooper and the driving plate.
In an embodiment of the present invention, the heat dissipation member is a heat dissipation plate, and the heat dissipation plate covers a heat dissipation opening formed on a side wall of the casing; the driving board is attached to the inner side surface of the heat dissipation plate.
In an embodiment of the utility model, the electrical device further includes a power terminal, and the power terminal is disposed on the housing and electrically connected to the power board through a flat cable.
In order to solve the above technical problem, the present invention further provides a frequency conversion device, where the frequency conversion device includes: the heat dissipating substrate may be a heat dissipating substrate that is integrally provided with the plurality of electrical devices.
According to the technical scheme, the main power device on the power board is directly attached to the heat dissipation substrate, the heat dissipation substrate is directly communicated with the outside, the heat of the main power device on the power board is directly transmitted to the outside through the heat dissipation substrate, the quick heat dissipation of the main power device on the power board is realized, the traditional heat dissipation mode of arranging a heat radiator in an air duct is replaced, the problem that the air duct is easily blocked is avoided, the problem of poor heat dissipation efficiency caused by the blockage of the air duct is further prevented, and the reliability of a product is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of an electrical apparatus according to the present invention;
FIG. 2 is a schematic view of a portion of the electrical apparatus of the present invention;
FIG. 3 is a schematic cross-sectional view of an electrical apparatus according to the present invention;
FIG. 4 is a schematic structural diagram of one embodiment of the frequency conversion apparatus according to the present invention;
fig. 5 is a schematic structural diagram of one embodiment of the frequency conversion device according to the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
16 | |
| 10 | Casing (CN) | 17 | |
| 11 | |
20 | |
| 12 | |
30 | |
| 13 | Control display | 40 | |
| 14 | |
41 | |
| 15 | Power terminal cover |
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides electrical equipment, and aims to avoid the problem that the heat dissipation of the electrical equipment is difficult due to the blockage of an air duct.
The specific structure of the electrical apparatus proposed by the present invention will be explained below in specific embodiments:
in the technical solution of the present embodiment, as shown in fig. 1 and fig. 3, an electrical device 110 includes a casing 10, a heat dissipation substrate 11 and a power board 20, wherein the casing 10 is provided with an accommodating cavity, and the accommodating cavity is provided with a heat dissipation opening; the heat dissipation substrate 11 is fixed on the casing 10 and used for plugging a heat dissipation port of the accommodating cavity; the power board 20 is fixed on the casing 10 and is positioned in the accommodating cavity; the main power device on the power board 20 is exposed at the heat dissipation opening and attached to the heat dissipation substrate 11.
Understandably, the main power device on the power board 20 is directly attached to the heat dissipation substrate 11, the heat dissipation substrate 11 is directly communicated with the outside, and heat emitted by the main power device on the power board 20 is directly transmitted to the outside through the heat dissipation substrate 11, so that the quick heat dissipation of the main power device on the power board 20 is realized, the problem that a traditional air channel is easily blocked is avoided, and the problem that the heat dissipation of the main power device on the power board 20 is influenced due to the blockage of the air channel is further prevented; the reliability of the product is improved.
Specifically, the electrical device 110 includes a casing 10, a heat dissipation substrate 11 and a power board 20, the casing 10 is provided with an accommodating cavity, the heat dissipation substrate 11 is fixed on a bottom plate of the casing 10 provided with a heat dissipation port for plugging the heat dissipation port of the accommodating cavity, a main power device on the power board 20 is attached to the heat dissipation substrate 11 through the heat dissipation port, and thus, one side surface of the heat dissipation substrate 11 is directly attached to the main power device on the power board 20; the other side surface opposite to the first side surface faces the outside and is used for radiating heat to the outside; therefore, heat generated by the main power device attached to the power board 20 on the heat dissipation substrate 11 can be directly transmitted to the outside through the heat dissipation substrate 11, and rapid heat dissipation is realized.
In a possible embodiment, the heat dissipation substrate 11 is a liquid-cooled heat dissipation plate, and fins are provided on a side of the liquid-cooled heat dissipation plate away from the power board 20 for more rapid heat dissipation.
In a possible embodiment, the surface of the heat dissipation substrate 11 facing away from the power board 20 is provided with a relieved heat sink for rapid heat dissipation.
Specifically, the electric device 100 includes a rectifier and an inverter.
In an embodiment of the present invention, the electrical apparatus 100 further includes a heat sink disposed on a surface of the heat dissipation substrate 11 facing away from the power board 20.
It is understood that the heat sink is disposed on a surface of the heat dissipating substrate 11 facing away from the power board 20 for dissipating heat from the heat dissipating substrate.
In one possible embodiment, the heat dissipation substrate 11 may be a substrate of a heat sink.
In an embodiment of the present invention, the heat sink is a gear shaping heat sink, a tooth relief heat sink, a profile heat sink, a heat pipe heat sink or a liquid cooling heat sink.
It can be understood that different radiators can be arranged to be used in combination with the radiating substrate 11 corresponding to different radiating environments, and the radiator can be a gear shaping radiator, a relieved-tooth radiator, a section bar radiator, a heat pipe radiator or a liquid cooling radiator.
In a feasible manner, under the condition of small heat dissipation environment, as shown in fig. 1, a liquid cooling radiator can be arranged, a liquid cooling plate of the liquid cooling radiator is connected to the heat dissipation substrate 11, and the heat can be dissipated quickly by utilizing the larger specific heat capacity of the liquid in the liquid cooling radiator; alternatively, a heat dissipating member such as a heat dissipating fin is provided on the heat dissipating substrate 11.
In an embodiment of the present invention, the main power device on the power board 20 is coated with a heat conductive silicone grease, and is attached to the heat dissipation substrate 11.
It can be understood that, for better heat dissipation, by disposing the heat conductive silicone grease between the power board 20 and the heat dissipation substrate 11 and fixing by screws, seamless connection between the power board 20 and the heat dissipation substrate 11 is achieved, and further by the heat conductive silicone grease, better heat transfer can be achieved.
In an embodiment of the present invention, as shown in fig. 3, the electrical device 100 further includes a driving board 30, wherein the driving board 30 is disposed perpendicular to the power board 20 and electrically connected to the power board 20; and the case 10 is provided with a heat sink 40 for dissipating heat from the driving board 30.
It can be understood that, in order to save the installation space of the electric device 110, by disposing the power board 20 perpendicularly to the driving board 30, the internal space of the receiving cavity is fully utilized, the power board 20 with a larger heat generation amount is disposed on the heat dissipation substrate 11, and the driving board 30 is disposed on the side wall of the casing 10; and a heat dissipation member 40 for dissipating heat from the driving board is disposed on the housing 10, so as to achieve independent heat dissipation of the driving board 30, which may be a heat dissipation plate or an independent heat dissipation air duct.
In an embodiment of the present invention, as shown in fig. 3, the heat sink 40 includes an air guiding cover 41 and a fan, the driving board 30 is fixed on a side wall of the casing 10, the air guiding cover 41 covers the driving board 30 to form an air duct by enclosing, and is used for covering the heating device on the driving board 30 in the air duct; the side wall of the wind scooper 41 is provided with an air inlet and an air outlet which are communicated with the air duct; the casing 10 is provided with an air inlet, which is provided with an air inlet area and an air outlet area, the air inlet area is communicated with the air inlet, the air outlet area is communicated with the air outlet, and the fan is arranged in the air duct and is used for introducing air flow from the air inlet and leading out the air flow from the air outlet.
The heat dissipation member 40 includes an air guide cover 41 and a fan, wherein the air guide cover 41 covers the driving board 30 to form an air channel, and is used for covering the heating device on the driving board 30 in the air channel to dissipate heat of the heating device on the driving board; the side wall of the wind scooper 41 is provided with an air inlet and an air outlet which are communicated with the air duct; the casing 10 is provided with an air inlet, which is provided with an air inlet area and an air outlet area, the air inlet area is communicated with the air inlet, the air outlet area is communicated with the air outlet, and the fan is arranged in the air duct and is used for introducing air flow from the air inlet and leading out the air flow from the air outlet.
In a possible embodiment, a partition is disposed in the wind scooper 41, the partition separates the wind channel into a U-shaped wind channel, the wind inlet is located at the lower side of the U-shaped wind channel, the wind outlet is located at the upper side of the U-shaped wind channel, wind enters the U-shaped wind channel from the lower side of the U-shaped wind channel, passes through the surface of the driving plate 30, carries away heat generated by electronic components on the driving plate 30, and is discharged from the upper side of the wind outlet. A fan is arranged in the air guide channel, and when the fan is arranged at one end of the lower side of the U-shaped air channel, the fan faces the air guide channel and blows air to the air guide channel to accelerate the flow of air flow; when the fan is arranged at one end of the lower side of the U-shaped air channel, the fan faces the outside of the air opening to draw air for the air guide channel and accelerate the flow of air flow; so that in the heat can flow out the wind-guiding passageway fast, and wind scooper 41 covers alone and establishes on drive plate 30, only dispels the heat for electronic components on the drive plate 30, and then can prevent that the pollutant from getting into and hold in the chamber or holding the pollutant entering wind-guiding passageway in the chamber, can dispel the heat to drive plate 30 alone effectively.
In the embodiment, a protrusion is arranged on the wind scooper 41, and the driving plate 30 is fixedly connected with the wind scooper 41 through the protrusion for fixing the driving plate 30 and preventing the driving plate 30 from changing position in the using process.
In an embodiment of the present invention, a sealing rubber strip is disposed between the wind scooper 41 and the driving plate 30.
It can be understood that, in order to prevent the contaminants on the other components in the accommodating cavity from entering the air guiding groove of the air guiding cover 41, the sealing rubber strip is arranged between the air guiding cover 41 and the driving plate 30, so that the contaminants are prevented from entering the air guiding groove from the gap, and the problem of blockage of the air inlet is effectively prevented.
In an embodiment of the present invention, the heat dissipation member 40 is a heat dissipation plate, and the heat dissipation plate covers a heat dissipation opening formed on a side wall of the casing 10; the driving board 30 is attached to the inner surface of the heat radiating plate.
As can be understood, in order to achieve better heat dissipation, the heat dissipation member 40 is a heat dissipation plate, and the heat dissipation plate covers the heat dissipation opening formed on the side wall of the casing 10; the driving board 30 is attached to the inner side surface of the heat dissipation plate to realize rapid heat dissipation of the driving board 30; the heat dissipation plate is vertically connected with the heat dissipation substrate 11, and secondary heat dissipation can be performed through the heat dissipation substrate 11, so that rapid heat dissipation is realized.
In an embodiment of the utility model, as shown in fig. 2, the electrical device 110 further includes a power terminal 12, the power terminal 12 is disposed on the casing 10, and the power terminal 12 is electrically connected to the power board 20 through a flat cable 17.
It can be understood that, in order to avoid a messy cable in the accommodating cavity, the flat cable 17 can be arranged according to a certain rule by electrically connecting the power terminal 12 and the power board 20 through the flat cable 17, and directly connecting the power terminal 12 and the power board 20 together; the power terminals 12 are disposed on the top of the casing 10 corresponding to the power board 20, and the flat cable 17 may be a copper or aluminum row.
Specifically, the electrical device 110 further includes a control display 13, a power terminal cover 15, and a face cover plate 14; the control display 13 is arranged at the top of the casing 10 and is positioned at one end far away from the power terminal 12; the panel 14 is arranged on the casing 10 in parallel with the control display 13. The control display 13 is arranged at the top of the casing 10, control wiring is arranged at the position of the casing 10 corresponding to the control display 13, one end of the control wiring is connected with the control display 13 and used for transmitting control signals and video signals, and the other end of the control wiring is connected with a controller in the driving board 30; the surface cover plate 14 and the control display 13 are arranged on the machine shell 10 in parallel in a covering mode, the surface cover plate 14 is used for being fixed on the machine shell 10, and the control terminal is arranged below the surface cover plate 14 and used for being connected with the control display 13, preventing the control terminal from being exposed outside and protecting the control terminal and achieving the effect of attractive appearance; the power terminal cover 15 is provided to cover the power terminal 12.
In an embodiment of the present invention, as shown in fig. 2, the casing 10 is provided with heat dissipation holes 16.
It can understand, in order to hold the intracavity to casing 10 and take a breath, louvre 16 has been seted up on casing 10 to the accessible for the intercommunication holds the chamber, take a breath for holding the chamber, and the heat that holds the intracavity can follow louvre 16 effluvium, louvre 16 is located between power terminal 12 and the power board 20, mainly dispels the heat for the heat that power board 20, power terminal 12 and winding displacement 17 produced, through the setting of aluminium row or copper bar, effectively reduces and holds the probability that the pollutant appears in the chamber.
In order to solve the above technical problem, the present invention further provides a frequency conversion device, as shown in fig. 4 and 5, the frequency conversion device includes: in the plurality of electrical devices 110, the plurality of electrical devices 110 are arranged in parallel, and the heat dissipation substrates 11 on the plurality of electrical devices 110 are integrally provided.
It can be understood that, after the plurality of electrical devices 110 are assembled and installed in the cabinet body, for better installation and heat dissipation, the plurality of heat dissipation substrates 11 are integrally arranged, and the heat dissipation substrates 11 are provided with installation and fixing hole sites and screw avoiding hole sites for integrated installation; when the electrical equipment 110 with an integrated structure is installed in a cabinet, the heat dissipation substrate 11 can be directly embedded into the heat dissipation air duct of the cabinet body, so that the protection of the cabinet body is improved, and the reliability and the service life of the system are also improved.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An electrical device, comprising:
the heat dissipation device comprises a shell, a heat dissipation plate and a heat dissipation plate, wherein the shell is provided with an accommodating cavity;
the heat dissipation substrate is fixed on the shell and used for plugging a heat dissipation port of the accommodating cavity; and
the power board is fixed on the shell and is positioned in the accommodating cavity; the main power device on the power board is exposed at the heat dissipation opening and is attached to the heat dissipation substrate.
2. The electrical apparatus of claim 1, further comprising a heat sink disposed on a surface of the heat-dissipating substrate facing away from the power board.
3. The electrical apparatus of claim 2, wherein the heat sink is a gear tooth heat sink, a relieved heat sink, a profile heat sink, a heat pipe heat sink, or a liquid cooled heat sink.
4. The electrical apparatus of claim 1, wherein the primary power devices on the power board are coated with a thermally conductive silicone grease that is applied to the heat-dissipating substrate.
5. The electrical apparatus of claim 1, further comprising a drive board disposed perpendicular to the power board and electrically connected to the power board; and a heat radiating piece used for radiating the driving board is arranged in the shell.
6. The electrical equipment as claimed in claim 5, wherein the heat dissipating member comprises an air guiding cover and a fan, the driving board is fixed on the side wall of the casing, the air guiding cover is arranged on the driving board to enclose an air channel, and the air guiding cover is used for covering the heating device on the driving board in the air channel; the side wall of the air guide cover is provided with an air inlet and an air outlet which are communicated with the air duct;
the air inlet area is communicated with the air inlet, the air outlet area is communicated with the air outlet, and the fan is arranged in the air channel and used for introducing air flow from the air inlet and leading out air flow from the air outlet.
7. The electrical equipment of claim 6, wherein a sealing strip is disposed between the wind scooper and the drive plate.
8. The electrical equipment of claim 5, wherein the heat sink is a heat sink plate that covers a heat sink opening formed in a side wall of the housing; the driving board is attached to the inner side surface of the heat dissipation plate.
9. The electrical apparatus of any one of claims 1 to 8, further comprising a power terminal provided on the housing and electrically connected to the power board by a flat cable.
10. An inverter device comprising a plurality of electrical devices according to any one of claims 1 to 9, wherein the plurality of electrical devices are arranged side by side, and wherein the heat dissipation substrates of the plurality of electrical devices are integrally provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122480880.5U CN216123378U (en) | 2021-10-14 | 2021-10-14 | Electrical device and frequency conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122480880.5U CN216123378U (en) | 2021-10-14 | 2021-10-14 | Electrical device and frequency conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216123378U true CN216123378U (en) | 2022-03-22 |
Family
ID=80692781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122480880.5U Active CN216123378U (en) | 2021-10-14 | 2021-10-14 | Electrical device and frequency conversion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216123378U (en) |
-
2021
- 2021-10-14 CN CN202122480880.5U patent/CN216123378U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9433123B2 (en) | Electric apparatus | |
| CN216123378U (en) | Electrical device and frequency conversion device | |
| CN216391914U (en) | Power equipment cabinet | |
| CN214070457U (en) | Heat radiation structure of converter group or multi-frequency converter group | |
| CN217283820U (en) | Power supply with air cooling and liquid cooling device | |
| CN215412220U (en) | Automatically controlled box, outer machine of air conditioner and air conditioner | |
| CN211128745U (en) | Motor controller | |
| CN210405072U (en) | Converter with directional heat dissipation function | |
| CN210624740U (en) | Electrical box assembly, outdoor unit and air conditioner | |
| CN114760810A (en) | Energy storage power supply | |
| CN210133520U (en) | Circuit board with plastic package structure | |
| CN209840293U (en) | Outdoor unit and air conditioner with same | |
| CN113508571A (en) | Heat radiation structure, camera and unmanned vehicles | |
| CN218124539U (en) | Power device and electric energy router | |
| CN216451729U (en) | HDMI distributor with simple heat radiation structure and high heat radiation efficiency | |
| CN214800318U (en) | Power electronic equipment | |
| CN218602539U (en) | Heat abstractor, power supply unit and integral type energy storage equipment | |
| CN218103960U (en) | Control device convenient for heat dissipation | |
| CN217484842U (en) | High-efficient radiating power module structure | |
| CN113543607B (en) | Explosion-proof control cabinet for high-power frequency converter | |
| CN219868202U (en) | Saddle type window machine | |
| CN219868201U (en) | Saddle type window machine | |
| CN218831066U (en) | Air-cooled heat conduction type spliced LED display device | |
| CN219372780U (en) | Electric control box and movable air conditioner | |
| CN220367516U (en) | Projection equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |