CN216080128U - Cold accumulation type air conditioning fan - Google Patents
Cold accumulation type air conditioning fan Download PDFInfo
- Publication number
- CN216080128U CN216080128U CN202121171228.9U CN202121171228U CN216080128U CN 216080128 U CN216080128 U CN 216080128U CN 202121171228 U CN202121171228 U CN 202121171228U CN 216080128 U CN216080128 U CN 216080128U
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- Prior art keywords
- cold accumulation
- heat exchange
- type air
- tube
- air conditioning
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- 238000009825 accumulation Methods 0.000 title claims abstract description 79
- 238000004378 air conditioning Methods 0.000 title claims abstract description 48
- 239000003507 refrigerant Substances 0.000 claims abstract description 60
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 30
- 241000894006 Bacteria Species 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract description 4
- 230000036541 health Effects 0.000 abstract description 4
- 238000009395 breeding Methods 0.000 abstract description 3
- 230000001488 breeding effect Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 7
- 230000001105 regulatory effect Effects 0.000 description 6
- 238000004321 preservation Methods 0.000 description 3
- 241000973497 Siphonognathus argyrophanes Species 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920005830 Polyurethane Foam Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000011496 polyurethane foam Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Images
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- Other Air-Conditioning Systems (AREA)
Abstract
The utility model relates to the technical field of household appliances, and provides a cold accumulation type air conditioning fan. The cold accumulation type air conditioning fan comprises a heat exchange tube, a cold accumulation module and a fan; the fan is used for driving air to flow through the heat exchange tube, the cold accumulation module comprises a cold accumulation tube and a cold accumulation unit, two ends of the heat exchange tube are respectively communicated with two ends of the cold accumulation tube to form a closed refrigerant circulation pipeline, and the cold accumulation unit is positioned on the periphery of the cold accumulation tube. The cold accumulation type air conditioning fan provided by the utility model is provided with the cold accumulation module and the closed refrigerant circulation pipeline. And cooling the refrigerant in the refrigerant circulation pipeline by using a cold storage unit in the cold storage module. The refrigerant can be recycled in the closed refrigerant circulation pipeline without replacement, so that the inconvenience that the traditional air-conditioning fan needs to frequently change water is avoided. And the relative humidity of the air in the environment cannot be increased, and the user experience is improved. In addition, the water tank does not need to be cleaned, so that the breeding of bacteria can be reduced, and the damage to the health of a human body is reduced.
Description
Technical Field
The utility model relates to the technical field of household appliances, in particular to a cold accumulation type air conditioning fan.
Background
Under the influence of factors such as price, occupied space, mobility, energy conservation and the like, more and more users buy air conditioning fans to replace air conditioners to adjust indoor temperature. The existing air-conditioning fan comprises a water tank and a fan, when the air-conditioning fan is used, an ice box is placed in the water tank to supply water and cool, and then water is conveyed to a water-absorbing fiber evaporator through a water pump. The wind blown out by the fan passes through the water absorption fiber evaporator, and takes away the heat of the air by utilizing the principle of water evaporation and heat absorption, thereby achieving the effect of blowing out cool wind.
However, the air conditioning fan in the related art has the following problems: the water quantity is gradually consumed, water needs to be added frequently, and the use is inconvenient; the relative humidity of air is high in summer, and the principle of the air conditioning fan is that flowing air is humidified by using water with low temperature, so that the relative humidity of the air is too high, a human body feels uncomfortable, and furniture or clothes are easily damped and moldy; the water tank needs to be cleaned frequently, otherwise the bacteria are easy to breed, and then the bacteria are blown into the air, so that the health of a human body is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model provides a cold accumulation type air conditioning fan, which is used for solving the problems that the air conditioning fan in the prior art is inconvenient to use, is easy to breed bacteria and is easy to cause overhigh relative humidity of indoor air.
The utility model provides a cold accumulation type air conditioning fan, which comprises a heat exchange tube, a cold accumulation module and a fan; the fan is used for driving air to flow through the heat exchange tube, the cold accumulation module comprises a cold accumulation tube and a cold accumulation unit, two ends of the heat exchange tube are respectively communicated with two ends of the cold accumulation tube to form a closed refrigerant circulation pipeline, and the cold accumulation unit is positioned on the periphery of the cold accumulation tube.
According to the cold accumulation type air conditioning fan provided by the utility model, the refrigerant circulating pipeline is provided with the stop valve.
According to the cold accumulation type air conditioning fan provided by the utility model, the stop valve is arranged between the outlet of the heat exchange tube and the inlet of the cold accumulation module.
According to the cold accumulation type air conditioning fan provided by the utility model, the refrigerant circulating pipeline is provided with the flow regulating valve.
According to the cold accumulation type air conditioning fan provided by the utility model, the cold accumulation module comprises a box body, the cold accumulation unit and the cold accumulation pipe are both positioned in the box body, and two ends of the cold accumulation pipe are respectively connected with the side wall of the box body.
According to the cold accumulation type air conditioning fan provided by the utility model, the side wall of the box body is provided with the heat insulation layer.
The cold accumulation type air conditioning fan further comprises a water receiving disc, and the water receiving disc is located below the heat exchange tube.
The cold accumulation type air conditioning fan further comprises a drain pipe, and the drain pipe is communicated with the water pan.
According to the cold accumulation type air conditioning fan provided by the utility model, the number of the heat exchange tubes is multiple, and the heat exchange tubes are arranged in a criss-cross manner.
The cold accumulation type air conditioning fan further comprises a pump, and the pump is mounted on the refrigerant circulating pipeline.
The cold accumulation type air conditioning fan provided by the utility model is provided with the cold accumulation module and the closed refrigerant circulation pipeline, and the cold accumulation unit in the cold accumulation module is used for cooling the refrigerant in the refrigerant circulation pipeline. The refrigerant can be recycled in the closed refrigerant circulation pipeline without replacement, so that the inconvenience that the traditional air-conditioning fan needs to frequently change water is avoided. And the relative humidity of the air in the environment cannot be increased, and the user experience is improved. In addition, the water tank does not need to be cleaned, so that the breeding of bacteria can be reduced, and the damage to the health of a human body is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural view of a cool storage type air conditioning fan provided by the present invention;
reference numerals:
1. a heat exchange pipe; 2. A cold storage module; 21. A cold storage tube;
22. a cold storage unit; 23. A box body; 3. A housing;
4. a stop valve; 5. A flow regulating valve; 6. A water pan;
7. and a water discharge pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Fig. 1 is a schematic structural view of a cool storage type air conditioning fan according to the present invention. The cool storage type air conditioning fan provided by the utility model comprises a heat exchange tube 1, a cool storage module 2 and a fan (not shown in the figure). The fan is used for driving air to flow through the heat exchange tube 1, and the cold accumulation module 2 includes a cold accumulation tube 21 and a cold accumulation unit 22. Two ends of the heat exchange tube 1 are respectively communicated with two ends of the cold accumulation tube 21 to form a closed refrigerant circulation pipeline. The cold storage unit 22 is located at the outer periphery of the cold storage tube 21. The cold storage unit 22 exchanges heat with the refrigerant in the refrigerant circulation line through the cold storage tube 21.
The cold accumulation unit 22 may be a bagged or boxed cold accumulation agent, such as ice crystal, which is packaged independently. The coolant can be taken out from the box body 23 independently and put into a refrigerator for freezing, so as to reduce the temperature and store the cold. When the air conditioning fan is used, the coolant is again loaded into the case 23. The heat exchange tube 1 and the cold accumulation tube 21 can be both disc-shaped tubes or heat exchange tube bundles comprising a plurality of straight tubes so as to increase the heat exchange area of the refrigerant and the cold accumulation unit 22 and air. The heat exchange tube 1 and the cold accumulation tube 21 are made of materials with high heat conductivity coefficient, such as copper or stainless steel.
Specifically, the cool storage type air conditioning fan further includes a housing 3. An air inlet and an air outlet are arranged on the shell 3, and the air inlet and the air outlet are communicated to form a heat exchange air channel. The fan is arranged in the heat exchange air channel and used for driving air to flow out of the shell 3 from the air outlet after exchanging heat with the heat exchange tube 1 from the air inlet shell 3. The fan can be selected from axial flow fan, centrifugal fan, cross flow fan, etc.
When in use, the cold accumulation unit 22 can be taken out and put into a refrigerating device for refrigeration, and then the cold accumulation unit is put into an air conditioning fan after having enough cold energy. The refrigerant in the cold storage tube 21 is cooled by the cold storage unit 22. After the cool storage type air conditioning fan is turned on, the cooled low-temperature refrigerant flows out from the outlet of the cool storage tube 21 and enters the heat exchange tube 1. After the low-temperature refrigerant in the heat exchange tube 1 exchanges heat with the air flowing through the heat exchange tube 1, a high-temperature refrigerant with the temperature equivalent to the room temperature is formed and flows back to the cold accumulation module 2 to enter the next cycle. If the cooling capacity of the cold storage unit 22 is insufficient, the existing cold storage unit 22 is taken out to perform cold storage again or replaced by the cold storage unit 22 with sufficient cooling capacity, so that the cold storage effect is ensured.
The cold accumulation type air conditioning fan provided by the utility model is provided with the cold accumulation module 2 and a closed refrigerant circulation pipeline. The refrigerant in the refrigerant circulation line is cooled by the cold storage unit 22 in the cold storage module 2. The refrigerant can be recycled in the closed refrigerant circulation pipeline without replacement, so that the inconvenience that the traditional air-conditioning fan needs to frequently change water is avoided. And the relative humidity of the air in the environment cannot be increased, and the user experience is improved. In addition, the water tank does not need to be cleaned, so that the breeding of bacteria can be reduced, and the damage to the health of a human body is reduced.
In one embodiment of the present invention, as shown in fig. 1, the cold storage module 2 is located above the heat exchange tube 1. The refrigerant in the cold storage tube 21 is condensed into a low-temperature liquid refrigerant by the cold storage unit 22. The low-temperature liquid refrigerant flows into the heat exchange tube 1 below the cold accumulation module 2 under the action of gravity. The fan drives indoor high-temperature air to pass through the heat exchange tube 1 and exchange heat with liquid refrigerants in the heat exchange tube 1, the low-temperature liquid refrigerants are converted into high-temperature gaseous refrigerants, and the high-temperature gaseous refrigerants naturally rise and flow back to the cold accumulation module 2. The refrigerant returning to the cold accumulation module 2 is re-condensed into a low-temperature liquid refrigerant, and the process is repeated. The refrigerant is gaseous refrigerant after with the air heat transfer after, through setting up cold-storage module 2 in the top of heat exchange tube 1 for at the whole cyclic process of refrigerant, need not to realize the autonomous cycle of refrigerant with the help of pumping device, noiselessness and energy can be saved.
Further, the cool storage type air conditioning fan further includes a pump (not shown). If the refrigerant is still liquid after heat exchange with air, the circulating power of the refrigerant in the refrigerant circulating pipeline can be provided by the pump. Optionally, the pump is installed between the outlet of the cold storage tube 21 and the inlet of the heat exchange tube 1, the inlet of the pump is connected to the outlet of the cold storage tube 21, and the outlet of the pump is connected to the inlet of the heat exchange tube 1, so as to ensure that the pump is located on the liquid refrigerant circulation pipeline.
In another embodiment of the present invention, the cold storage module 2 is located below the heat exchange tube 1. The circulating power of the refrigerant in the refrigerant circulating pipeline is provided by the pump. The cold accumulation module 2 is arranged below the heat exchange tube 1, so that the position of a heat exchange area where the heat exchange tube 1 of the air conditioner fan is located is higher, and the air outlet can be arranged right opposite to the heat exchange area. Therefore, the height of the air outlet can be increased, and the influence on user experience caused by the fact that cold air is in a low-level position due to too low air outlet position is avoided; the length of the air channel between the fan and the air outlet can be reduced to reduce the loss of cold energy of the air after heat exchange.
In the embodiment of the utility model, the refrigerant circulating pipeline is provided with a stop valve 4. When the cool storage type air conditioning fan is turned off, the stop valve 4 is also turned off. So as to prevent the cold loss caused by the continuous flowing of the refrigerant, thereby reducing the times of replacing the cold accumulation unit 22. Optionally, the stop valve 4 is an electronic stop valve.
Optionally, the stop valve 4 is installed between the outlet of the heat exchange tube 1 and the inlet of the cold storage module 2. The air conditioner is used for preventing the gasified refrigerant from continuously flowing back to the cold accumulation module 2 after the cold accumulation type air conditioner fan is closed, so as to prevent the loss of the cold energy of the cold accumulation unit 22.
In the embodiment of the utility model, a flow regulating valve 5 is also arranged on the refrigerant circulating pipeline. The refrigerant flow entering the heat exchange tube 1 can be adjusted by adjusting the opening degree of the flow adjusting valve 5, so that the air outlet temperature can be accurately controlled. The flow regulating valve 5 is an electromagnetic flow regulating valve such as an electronic expansion valve.
The cold accumulation type air conditioner fan further comprises a controller and a temperature sensor, the temperature sensor is in communication connection with the controller, and the temperature sensor is used for sensing the indoor environment temperature. The controller determines the flow of the refrigerant entering the heat exchange tube 1 according to the detected indoor environment temperature and the target temperature set by the user, and then adjusts the opening of the flow adjusting valve 5 according to the refrigerant flow.
The opening degree of the flow rate control valve 5 has a certain correspondence relationship with the refrigerant flow rate flowing therethrough and the indoor ambient temperature. And determining the opening degree of the flow regulating valve 5 according to the corresponding relation and the current indoor environment temperature. Specifically, when it is sensed that the indoor ambient temperature is lower than the target temperature, the opening degree of the flow rate adjustment valve 5 is decreased; when sensing that the indoor ambient temperature is higher than the target temperature, the opening degree of the flow rate adjustment valve 5 is increased, thereby ensuring that the indoor ambient temperature is stabilized near the target temperature.
In the embodiment of the utility model, the cold storage module 2 comprises a box body 23, the cold storage unit 22 and the cold storage tube 21 are both located in the box body 23, and both ends of the cold storage tube 21 are respectively connected with the side wall of the box body 23. Specifically, the side wall of the box body 23 is provided with an inlet pipe orifice and an outlet pipe orifice. The outlet of the heat exchange tube 1 is communicated with the inlet of the cold accumulation tube 21 through a tube inlet, and the inlet of the heat exchange tube 1 is communicated with the outlet of the cold accumulation tube 21 through a tube outlet. The inlet of the cold accumulation tube 21 is fixed on the inlet tube mouth, and the outlet of the cold accumulation tube 21 is fixed on the outlet tube mouth. The plurality of cold storage units 22 are placed around the cold storage tubes 21. Optionally, two ends of the cold storage tube 21 respectively penetrate through the side wall of the box body 23 to be connected with the heat exchange tube 1, or two ends of the heat exchange tube 1 respectively penetrate through the side wall of the box body 23 to be connected with the cold storage tube 21. The cold accumulation tube 21 and the heat exchange tube 1 can be an integrated pipeline or a separated and detachable pipeline.
Further, the lateral wall of box body 23 is equipped with the heat preservation, forms the heat preservation box. Wherein the heat-insulating layer is made of heat-insulating materials, such as polyurethane foam, polystyrene board, EPS, XPS, phenolic foam, glass wool, rock wool and the like. The heat preservation layer can reduce the heat exchange between the cold accumulation unit 22 in the box body 23 and the external environment, and the cold quantity is saved.
In the embodiment of the utility model, the cold accumulation type air conditioning fan further comprises a water receiving disc 6. The water pan 6 is positioned below the heat exchange tube 1. When the surface temperature of the heat exchange pipe 1 is lower than the indoor air temperature, the surface of the heat exchange pipe 1 generates condensed water. The water-receiving tray 6 is used for receiving the condensed water flowing down from the heat exchange pipe 1. The drip tray 6 is made of a rust-resistant material, such as a stainless steel tray.
Further, the cool storage type air conditioning fan further includes a drain pipe 7. The drain pipe 7 is communicated with the water pan 6. Specifically, a drain hole is formed at the bottom of the water pan 6, and the drain pipe 7 is connected with the drain hole. The condensed water is discharged to the outside of the air conditioning fan through the drain pipe 7.
In the embodiment of the utility model, the number of the heat exchange tubes 1 is multiple, and the heat exchange tubes 1 are arranged in a criss-cross manner. Specifically, two ends of each heat exchange tube 1 are respectively communicated with two ends of the cold storage tube 21, so that the low-temperature refrigerant enters the plurality of heat exchange tubes 1 at the same time. The plurality of heat exchange tubes 1 are arranged in a staggered manner to increase the heat exchange area and the heat exchange efficiency of the air and the heat exchange tubes 1.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A cold accumulation type air conditioning fan is characterized by comprising a heat exchange tube, a cold accumulation module and a fan; the fan is used for driving air to flow through the heat exchange tube, the cold accumulation module comprises a cold accumulation tube and a cold accumulation unit, two ends of the heat exchange tube are respectively communicated with two ends of the cold accumulation tube to form a closed refrigerant circulation pipeline, and the cold accumulation unit is positioned on the periphery of the cold accumulation tube.
2. The cool storage type air conditioning fan according to claim 1, wherein a shutoff valve is provided on the refrigerant circulation line.
3. The cool storage type air conditioning fan as claimed in claim 2, wherein the cut-off valve is installed between the outlet of the heat exchange pipe and the inlet of the cool storage module.
4. The cool storage type air conditioning fan according to claim 1, wherein a flow rate adjusting valve is provided in the refrigerant circulation line.
5. The cool storage type air conditioning fan as claimed in claim 1, wherein the cool storage module comprises a box body, the cool storage unit and the cool storage tube are both located in the box body, and both ends of the cool storage tube are respectively connected to the side walls of the box body.
6. The cool storage type air conditioning fan according to claim 5, wherein the side wall of the case body is provided with an insulating layer.
7. The cool storage type air conditioning fan according to claim 1, further comprising a water pan located below the heat exchange tube.
8. The cool storage type air conditioner fan as claimed in claim 7, further comprising a drain pipe, wherein the drain pipe is communicated with the water pan.
9. The cool storage type air conditioning fan according to claim 1, wherein the number of the heat exchange tubes is plural, and the plural heat exchange tubes are arranged in a criss-cross manner.
10. The cool storage type air conditioner fan as claimed in claim 1, further comprising a pump installed on the refrigerant circulation line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121171228.9U CN216080128U (en) | 2021-05-27 | 2021-05-27 | Cold accumulation type air conditioning fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121171228.9U CN216080128U (en) | 2021-05-27 | 2021-05-27 | Cold accumulation type air conditioning fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216080128U true CN216080128U (en) | 2022-03-18 |
Family
ID=80662694
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121171228.9U Active CN216080128U (en) | 2021-05-27 | 2021-05-27 | Cold accumulation type air conditioning fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216080128U (en) |
-
2021
- 2021-05-27 CN CN202121171228.9U patent/CN216080128U/en active Active
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