CN215416567U - Computer machine case convenient to it is clean - Google Patents
Computer machine case convenient to it is clean Download PDFInfo
- Publication number
- CN215416567U CN215416567U CN202120848566.5U CN202120848566U CN215416567U CN 215416567 U CN215416567 U CN 215416567U CN 202120848566 U CN202120848566 U CN 202120848566U CN 215416567 U CN215416567 U CN 215416567U
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- Prior art keywords
- plate
- exhaust
- air inlet
- side plate
- assembly
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- 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.)
- Expired - Fee Related
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- 238000001914 filtration Methods 0.000 claims abstract description 52
- 238000002955 isolation Methods 0.000 claims description 14
- 230000001681 protective effect Effects 0.000 claims description 6
- 230000003670 easy-to-clean Effects 0.000 claims description 4
- 238000009434 installation Methods 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- 239000000428 dust Substances 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 6
- 238000009423 ventilation Methods 0.000 description 6
- 241000886569 Cyprogenia stegaria Species 0.000 description 5
- 230000017525 heat dissipation Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
The utility model discloses a computer case convenient to clean, which comprises a shell component, an air inlet filtering component and an air exhaust filtering component, wherein the shell component comprises a main case, a front case and a rear case, the front case and the rear case are respectively installed at the front end and the rear end of the main case, a side plate is detachably installed on the side part of the main case, the air inlet filtering component and the air exhaust filtering component are both installed in combination with the side plate, and the air inlet filtering component and the air exhaust filtering component both penetrate through the side plate. The computer case convenient to clean is convenient and quick to clean and has good energy saving performance.
Description
Technical Field
The utility model relates to the technical field of computer hardware, in particular to a computer case convenient to clean.
Background
Along with the continuous progress of science and technology, the popularity of computers is gradually increased, and computers become necessary electronic equipment in work and life of people. The desktop computer host which is most widely applied generally comprises a case and components such as a main board, a power supply, a hard disk, a cooling fan and the like which are arranged in the case, wherein the case is a basic component of the computer host, the main board, the power supply, the hard disk, the cooling fan and the like are all arranged in the case, and the case mainly plays a role in supporting and protecting.
Because the host computer can produce certain heat at the operation in-process, in order to realize the heat dissipation function, generally be equipped with some fretwork areas on the current quick-witted case, install radiator fan on the position that corresponds with the fretwork area on the machine incasement wall, install air inlet fan and exhaust fan respectively in different fretwork areas usually, realize quick-witted case heat dissipation function. Set up the fretwork region on the quick-witted case and be favorable to realizing the heat dissipation function, but inside external dust also can get into quick-witted incasement portion through the fretwork region, the dust gets into quick-witted incasement portion back, can gather on the part of quick-witted incasement, and the dust is gathered too much and can be influenced the performance and the life of computer. Therefore, the computer host using the prior art chassis needs to perform cleaning process on the inside thereof periodically.
Computer machine case of prior art generally need dismantle when clean, expose inner space, and clean operation is very inconvenient, has greatly influenced the maintenance efficiency of computer.
SUMMERY OF THE UTILITY MODEL
In view of the above, an object of the present invention is to provide a computer case that is easy to clean, so as to improve the maintenance efficiency of the computer.
In order to achieve the purpose, the utility model provides a computer case convenient to clean, which comprises a shell assembly, an air inlet filtering assembly and an air exhaust filtering assembly, wherein the shell assembly comprises a main case, a front case and a rear case, the front case and the rear case are respectively installed at the front end and the rear end of the main case, a side plate is detachably installed on the side part of the main case, the air inlet filtering assembly and the air exhaust filtering assembly are both installed in combination with the side plate, and the air inlet filtering assembly and the air exhaust filtering assembly penetrate through the side plate.
Preferably, the air inlet filtering assembly comprises an air inlet plate, a filtering assembly and a fan assembly, one side edge of the air inlet plate is rotatably connected with the outer side of the side plate, the air inlet plate is of a hollow structure, air inlet through holes are formed in the positions, corresponding to the air inlet plate, of the side plate, and when the air inlet plate rotates to be parallel to the side plate, the air inlet through holes are completely shielded by the air inlet plate; the filter assembly is arranged on one side of the air inlet plate, and when the air inlet plate rotates to be parallel to the side plate, the filter assembly is embedded into the air inlet through hole; the fan assembly is installed on the inner side of the side plate, and the fan assembly completely covers the air inlet through hole.
Preferably, the exhaust filtering assembly comprises an exhaust plate, a filtering assembly and a fan assembly, one side of the exhaust plate is rotatably connected with the outer side of the side plate, the exhaust plate is of a hollow structure, the side plate and the exhaust plate are provided with exhaust through holes at corresponding positions, and when the exhaust plate rotates to be parallel to the side plate, the exhaust plate completely shields the exhaust through holes; the filter assembly is arranged on one side of the exhaust plate, and is embedded into the exhaust through hole when the exhaust plate rotates to be parallel to the side plate; the fan assembly is installed at the inner side of the side plate, and the fan assembly completely covers the air exhaust through hole.
Preferably, one side edge of the air inlet plate is rotatably connected with the side plate through a hinge, and an air inlet plate knob is arranged at one end, far away from the hinge, of the air inlet plate; when the air inlet plate rotates to be parallel to the side plate, the air inlet plate is detachably connected with the side plate through the air inlet plate knob.
Preferably, one side edge of the exhaust plate is rotatably connected with the side plate through a hinge, and one end, far away from the hinge, of the exhaust plate is provided with an exhaust plate knob; when the exhaust plate rotates to be parallel to the side plate, the exhaust plate is detachably connected with the side plate through the exhaust plate knob.
Preferably, the fan assembly comprises an isolation net, a fan housing, a plurality of motors and a plurality of fan blades, the isolation net is fixedly connected with the side plate, the fan housing is aligned with the isolation net, the fan housing is located on one side, away from the side plate, of the isolation net, the motors are installed inside the fan housing, the fan blades are installed on each motor, a plurality of protective nets are embedded on one side, away from the side plate, of the fan housing, and the protective nets are respectively aligned with the motors.
Preferably, the front casing is provided with a control assembly, the control assembly comprises a control box and a temperature sensor, the temperature sensor is electrically connected with the control box, and the control box is electrically connected with the air inlet filtering assembly and the air exhaust filtering assembly.
Preferably, a display screen and a control board are installed on the front case, and the display screen and the control board are electrically connected with the control box.
Preferably, the top end of the front casing is provided with a slope structure, the slope structure part of the front casing is provided with a starting button and a restoring button, and the middle part of the front casing is provided with a first external plugboard and a protection plate.
Preferably, a power socket and a second externally-arranged plug board are embedded in the rear shell, the power socket is located at the end part of the rear shell, and the second externally-arranged plug board is located in the middle of the rear shell.
Compared with the prior art, the computer case convenient to clean disclosed by the utility model has the advantages that: the computer case convenient to clean is provided with the filter elements at the air inlet and air exhaust positions, so that dust is prevented from entering the case, the dust is prevented from accumulating in the case, the adverse effect of the dust on the operation of the computer is effectively prevented, and the inside of the case is not required to be cleaned; the side plates are provided with detachable air inlet plates and air exhaust plates corresponding to the filter element, the filter element can be cleaned by removing the air inlet plates and the air exhaust plates, and the cleaning operation is convenient and rapid; through setting up the control assembly, can detect the temperature of quick-witted incasement to according to the operating condition that the temperature information that detects switches fan assembly, can effectively avoid the electric energy extravagant, energy-conservation nature is better.
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 drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a computer case convenient to clean according to the present invention.
FIG. 2 is a right side view of a computer chassis of the present invention that is easy to clean.
FIG. 3 is a front partial cross-sectional view of a computer chassis that is easy to clean according to the present invention.
Fig. 4 is a partial cross-sectional view of the left side of a computer case of the present invention for easy cleaning.
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.
As shown in fig. 1 to 4, the computer case convenient to clean according to the present invention includes a case assembly 100, an intake filter assembly 200, and an exhaust filter assembly 300, wherein the case assembly 100 includes a main case 1, a front case 6, and a rear case 15, the front case 6 and the rear case 15 are respectively installed at front and rear ends of the main case 1, a side plate 9 is detachably installed at a side portion of the main case 6, the intake filter assembly 200 and the exhaust filter assembly 300 are both installed in combination with the side plate 9, and the intake filter assembly 200 and the exhaust filter assembly 300 both penetrate through the side plate. The computer case inner space convenient to clean is only communicated with the outside through the air inlet filtering component 200 and the air exhaust filtering component 300, and external dust is blocked by the air inlet filtering component 200 and the air exhaust filtering component 300 and cannot enter the case inner part, so that the dust is effectively prevented from accumulating in the case inner part, the dust is effectively prevented from causing adverse effects on the operation of the computer, and the case inner part is not required to be cleaned.
Specifically, the side plate 9 is detachably connected to the main chassis 1 by a plurality of fixing screws 12. Preferably, four corners of the side plate 9 are detachably connected to the main chassis 1 by four fixing screws 12, respectively. The side plate 9 can be removed by screwing down the fixing screw 12, and operations such as installation and maintenance of the internal components of the main unit can be performed.
The intake air filtering assembly 200 comprises an intake plate 11, a filtering assembly 210 and a fan assembly 220, wherein one side edge of the intake plate 11 is rotatably connected with the outer side of the side plate 9, the intake plate 11 is of a hollow structure, intake through holes are formed in the positions of the side plate 9 corresponding to the intake plate 11, and when the intake plate 11 rotates to be parallel to the side plate 9, the intake through holes are completely shielded by the intake plate 11. The filter assembly 210 is installed at one side of the air inlet panel 11, and when the air inlet panel 11 is rotated to be parallel to the side panel 9, the filter assembly 210 is inserted into the air inlet through hole. The fan assembly 220 is installed inside the side plate 9, and the fan assembly 220 completely covers the intake through-hole. The fan assembly 220 is arranged to wind from the outside of the side plate 9 to the inside of the side plate 9. The ventilation effect of the air inlet plate 11 with the hollow structure is good, and the air inlet plate can protect the filtering component 210 and the fan component 220. The dust is blocked by the filtering component 210 and cannot enter the interior of the case, the filtering component 210 can be taken out of the case from the side plate 9 to be cleaned by rotating the air inlet plate 11, and the operation is convenient.
Specifically, one side edge of the air inlet plate 11 is rotatably connected with the side plate 9 through a hinge, one end, away from the hinge, of the air inlet plate 11 is provided with an air inlet plate knob 13, and when the air inlet plate 11 rotates to be parallel to the side plate 9, the air inlet plate 11 is detachably connected with the side plate 9 through the air inlet plate knob 13. The air inlet plate 11 can be fixedly connected with the side plate 9 by operating the air inlet plate knob 13. Meanwhile, the opening and closing of the air inlet plate 11 can be conveniently realized by operating the air inlet plate knob 13, and the filtering component 210 is convenient to clean.
The exhaust filtering assembly 300 comprises an exhaust plate 10, a filtering assembly 210 and a fan assembly 220, one side of the exhaust plate 10 is rotatably connected with the outer side of the side plate 9, the exhaust plate 10 is of a hollow structure, the side plate 9 and the exhaust plate 10 are provided with exhaust through holes in corresponding positions, and when the exhaust plate 10 rotates to be parallel to the side plate 9, the exhaust plate 10 completely shields the exhaust through holes. The filter assembly 210 is installed at one side of the discharge plate 10, and the filter assembly 210 is inserted into the discharge through-hole when the discharge plate 10 is rotated to be parallel to the side plate 9. The fan assembly 220 is installed inside the side plate 9, and the fan assembly 220 completely covers the ventilating through-hole. The fan assembly 220 is arranged to wind from the inside of the side plate 9 to the outside of the side plate 9. The ventilation effect of the ventilation board 10 with the hollow structure is good, and the ventilation board can protect the filtering component 210 and the fan component 220. The dust is blocked by the filtering component 210 and cannot enter the interior of the case, the filtering component 210 can be taken out of the case from the side plate 9 to be cleaned by rotating the exhaust plate 10, and the operation is convenient.
Specifically, a side edge of the exhaust plate 10 is rotatably connected with the side plate 9 through a hinge, an exhaust plate knob 14 is arranged at one end, away from the hinge, of the exhaust plate 10, and when the exhaust plate 10 rotates to be parallel to the side plate 9, the exhaust plate 10 is detachably connected with the side plate 9 through the exhaust plate knob 14. The ventilation plate 10 can be fixedly connected to the side plate 9 by operating the ventilation plate knob 14. Meanwhile, the opening and closing of the exhaust plate 10 can be conveniently realized by operating the exhaust plate knob 14, and the filtering component 210 is convenient to clean.
The filter assembly 210 is preferably a filter cartridge 22, the filter cartridge 22 is connected to the air inlet panel 11 or the air discharge panel 10, and the filter cartridge 2 is inserted into the air inlet hole or the air discharge hole when the air inlet panel 11 or the air discharge panel 10 is rotated to be parallel to the side panel 9. Preferably, the filter element 22 is detachably connected with the air inlet plate 11 or the air exhaust plate 10, and the filter element 22 can be detached for independent cleaning during cleaning, so that the operation is more convenient.
The fan assembly 220 comprises an isolation net 23, a fan shell 20, a plurality of motors 25 and a plurality of fan blades 24, the isolation net 23 is fixedly connected with the side plate 9, the fan shell 20 is aligned with the isolation net 23, the fan shell 20 is located on one side, away from the side plate 9, of the isolation net 23, the motors 25 are installed inside the fan shell 20, the fan blades 24 are installed on each motor 25, a plurality of protective nets 21 are embedded on one side, away from the side plate 9, of the fan shell 20, and the protective nets 21 are respectively aligned with the motors 25. The isolation net 23 plays a role in isolation and protection, and the protection net 21 plays a role in protection.
The front casing 6 is provided with a control assembly 400 in combination, the control assembly 400 comprises a control box 18 and a temperature sensor 19, the temperature sensor 19 is electrically connected with the control box 18, and the control box 18 is electrically connected with the intake air filtering assembly 200 and the exhaust air filtering assembly 300. The temperature sensor 19 detects the temperature inside the case, and transmits temperature data to the control box 18, and the control box 18 controls the working states of the intake air filtering component 200 and the exhaust air filtering component 300 according to the temperature data, so that the dynamic control is realized, and the energy can be effectively saved.
Furthermore, a display screen 7 and a control panel 8 are installed on the front case 6, and both the display screen 7 and the control panel 8 are electrically connected with the control box 18. Through the display screen 7 and the control panel 8, a user can conveniently check the operating parameters of the case and adjust the working parameters of the control box 18.
The top end of the front case 6 has a slope structure, and the slope structure of the front case 6 is partially provided with the start button 2 and the restore button 3. The middle part of the front shell 6 is provided with a first external plugboard 4 and a protection board 5, which is convenient for connecting external devices. The rear shell 15 is provided with a power socket 16 and a second external plug board 17 in an embedded manner. A power socket 16 is located at the end of the rear housing 15 for connection to a power cord. The second external plugboard 17 is positioned in the middle of the rear shell 15, so that the connection with external equipment is facilitated.
When the computer case convenient to clean is used, the control box 18 controls the working states of the air inlet filtering component 200 and the air exhaust filtering component 300 according to the temperature data collected by the temperature sensor 19, and automatically switches the three heat dissipation modes of natural or air exhaust opening or double opening to dynamically adapt to different heat dissipation requirements, so that the energy consumption is reduced while the temperature in the case is not over standard, and the energy conservation is better. The external dust is blocked by the filter element 22, and can not enter the interior of the case, so that the interior of the case does not need to be cleaned, and only the filter element 22 needs to be cleaned. The filter element 22 is installed on the air inlet plate 11 and the air exhaust plate 10, the air inlet plate 11 and the air exhaust plate 10 can be unscrewed through the air inlet plate knob 13 and the air exhaust plate knob 14, the filter element 22 is cleaned, the operation is convenient, and the cleaning efficiency of the computer is improved. The computer case convenient to clean is reasonable in structure arrangement, convenient to install and maintain, high in intelligent degree, convenient to use and capable of saving energy.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a computer machine case convenient to it is clean, its characterized in that, includes shell subassembly, air inlet filtering component and the filtering component that airs exhaust, shell subassembly includes mainframe shell, preceding casing and back casing, preceding casing reaches back casing is installed respectively both ends around the mainframe shell, mainframe shell lateral part detachable installation curb plate, air inlet filtering component reaches the filtering component that airs exhaust all with the curb plate combines the installation, just air inlet filtering component reaches the filtering component that airs exhaust all pierces through the curb plate.
2. The computer case convenient to clean as claimed in claim 1, wherein the intake air filtering assembly comprises an intake plate, a filtering assembly and a fan assembly, one side of the intake plate is rotatably connected with the outer side of the side plate, the intake plate is a hollow structure, the side plate has intake air through holes at positions corresponding to the intake plate, and when the intake plate rotates to be parallel to the side plate, the intake air through holes are completely blocked by the intake plate; the filter assembly is arranged on one side of the air inlet plate, and when the air inlet plate rotates to be parallel to the side plate, the filter assembly is embedded into the air inlet through hole; the fan assembly is installed on the inner side of the side plate, and the fan assembly completely covers the air inlet through hole.
3. The computer case convenient to clean of claim 1, wherein the exhaust filtering assembly comprises an exhaust plate, a filtering assembly and a fan assembly, one side of the exhaust plate is rotatably connected with the outer side of the side plate, the exhaust plate is of a hollow structure, the side plate is provided with exhaust through holes at positions corresponding to the exhaust plate, and when the exhaust plate rotates to be parallel to the side plate, the exhaust plate completely shields the exhaust through holes; the filter assembly is arranged on one side of the exhaust plate, and is embedded into the exhaust through hole when the exhaust plate rotates to be parallel to the side plate; the fan assembly is installed at the inner side of the side plate, and the fan assembly completely covers the air exhaust through hole.
4. The easy-to-clean computer case of claim 2, wherein one side of the air inlet plate is rotatably connected to the side plate by a hinge, and an air inlet plate knob is disposed at an end of the air inlet plate away from the hinge; when the air inlet plate rotates to be parallel to the side plate, the air inlet plate is detachably connected with the side plate through the air inlet plate knob.
5. The computer case convenient to clean of claim 3, wherein one side edge of the exhaust plate is rotatably connected with the side plate through a hinge, and an exhaust plate knob is arranged at one end of the exhaust plate, which is far away from the hinge; when the exhaust plate rotates to be parallel to the side plate, the exhaust plate is detachably connected with the side plate through the exhaust plate knob.
6. The computer case convenient to clean as claimed in any one of claims 2 or 3, wherein the fan assembly includes an isolation net, a fan housing, a plurality of motors, and a plurality of fan blades, the isolation net is fixedly connected to the side plate, the fan housing is aligned with the isolation net, the fan housing is located on one side of the isolation net away from the side plate, the plurality of motors are installed inside the fan housing, each motor is provided with a plurality of fan blades, one side of the fan housing away from the side plate is embedded with a plurality of protective nets, and the protective nets are respectively aligned with the motors.
7. The computer case convenient to clean of claim 1, wherein the front housing is combined with a control assembly, the control assembly comprises a control box and a temperature sensor, the temperature sensor is electrically connected with the control box, and the control box is electrically connected with the intake air filtering assembly and the exhaust air filtering assembly.
8. The computer case convenient to clean of claim 7, wherein a display screen and a control panel are mounted on the front housing, and the display screen and the control panel are electrically connected with the control box.
9. The computer case convenient to clean as claimed in claim 1, wherein the top end of the front housing has a slope structure, the slope structure of the front housing is partially provided with a start button and a recovery button, and the middle part of the front housing has a number one peripheral board and a protection board.
10. The computer case convenient to clean as claimed in claim 1, wherein a power socket and a second external plug board are embedded in the rear housing, the power socket is located at the end of the rear housing, and the second external plug board is located in the middle of the rear housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120848566.5U CN215416567U (en) | 2021-04-23 | 2021-04-23 | Computer machine case convenient to it is clean |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120848566.5U CN215416567U (en) | 2021-04-23 | 2021-04-23 | Computer machine case convenient to it is clean |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215416567U true CN215416567U (en) | 2022-01-04 |
Family
ID=79672680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120848566.5U Expired - Fee Related CN215416567U (en) | 2021-04-23 | 2021-04-23 | Computer machine case convenient to it is clean |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215416567U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116036756A (en) * | 2023-03-31 | 2023-05-02 | 深圳市昱森机电有限公司 | Motor air inlet filter equipment |
-
2021
- 2021-04-23 CN CN202120848566.5U patent/CN215416567U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116036756A (en) * | 2023-03-31 | 2023-05-02 | 深圳市昱森机电有限公司 | Motor air inlet filter equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220104 |
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| CF01 | Termination of patent right due to non-payment of annual fee |