CN215175486U - Fresh air induction device - Google Patents
Fresh air induction device Download PDFInfo
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- CN215175486U CN215175486U CN202121267660.8U CN202121267660U CN215175486U CN 215175486 U CN215175486 U CN 215175486U CN 202121267660 U CN202121267660 U CN 202121267660U CN 215175486 U CN215175486 U CN 215175486U
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Abstract
The utility model provides a fresh air inducing device; the fresh air inducing device comprises a shell, a fresh air heat exchanger, a nozzle, an inducing heat exchanger, an air return inlet and an air supply outlet; the shell is connected with a fresh air inlet pipe; by arranging the fresh air heat exchanger, heating or refrigerating or dehumidifying the fresh air entering the shell from the fresh air inlet pipe to obtain pretreated fresh air; the induction heat exchanger heats or refrigerates or dehumidifies the air entering the shell from the air return inlet to obtain pretreated air; the pretreated fresh air is mixed with the pretreated air after passing through the nozzle to obtain mixed air, and the mixed air is supplied through the air supply outlet. The utility model discloses a new trend heat exchanger carries out the preliminary treatment to the new trend, can accelerate the efficiency of treated air, regulates and control the indoor environment sooner to satisfy people and reach the demand of comfortable environment fast to the indoor air conditioning environment.
Description
Technical Field
The utility model relates to an air conditioning equipment technical field, very much relate to a new trend induction system.
Background
With the widespread use of central air conditioning systems, people are beginning to focus on the health and comfort of the indoor air conditioning environment. The central air conditioning system universally existing in the market consists of a cold and heat source and an indoor air conditioner, the indoor air conditioner extracts air through a fan and exchanges heat with a heat exchanger, and the basic requirements of people on the air conditioning environment can be met. However, the central air conditioning system also has some technical problems, which affect the life of people. The indoor air circulation is driven by the fan, and even the most advanced noise reduction fan is adopted, certain noise can not be generated. When people are quiet at night, the noise of the equipment can interfere the sleep of people and influence the body health of users. The air outlet of the indoor air conditioning equipment is short in length and concentrated in air speed. When the air is blown in summer, cold air is blown to the human body quickly, so that the comfort is poor, and people can catch a cold easily. Indoor central air conditioning equipment adopts circulation air supply, does not have fresh air, leads to carbon dioxide gathering, has reduced indoor air quality, also can produce adverse effect to people's health.
The technical problem that above-mentioned most central air conditioning system exists can be improved to current chilled beam device, but current chilled beam device is not fast enough owing to the efficiency of handling the speed to the air, can not satisfy people and reach comfortable environment's demand fast to the room air conditioning environment. In addition, when current chilled beam device lets in low temperature medium in the coil pipe pipeline, especially in summer and plum rain season, the wet reaction takes place to separate out in the low temperature coil pipe met to vapor in the air, produces the comdenstion water, can appear the comdenstion water and instil into indoor problem.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a new trend induction system has improved the efficiency problem of process air to can accelerate the speed of handling room air, reach the demand of comfortable environment fast to the room air conditioning environment with satisfying people.
In order to achieve the purpose, the utility model provides a fresh air inducing device, which comprises a shell, a fresh air heat exchanger, a nozzle, an inducing heat exchanger, an air return inlet and an air supply outlet; the shell is connected with a fresh air inlet pipe; the fresh air heat exchanger, the nozzle and the induction heat exchanger are all arranged in the shell, and the air return inlet and the air supply outlet are arranged on the shell;
the fresh air heat exchanger is used for heating or refrigerating or dehumidifying the fresh air entering the shell from the fresh air inlet pipe to obtain pretreated fresh air;
the induction heat exchanger is used for heating or refrigerating or dehumidifying the air entering the shell from the air return inlet to obtain pretreated air;
the pretreatment fresh air passes through the nozzle and then is mixed with the pretreatment air to obtain mixed air, and the mixed air is supplied through the air supply outlet.
Optionally, the fresh air inducing device further comprises a mixed water collecting disc and a drain pipe; the mixed water accumulation disc is arranged in the shell and below the induction heat exchanger, and is used for collecting condensed water generated by the induction heat exchanger;
the drain pipe with mix ponding dish and be connected for with the comdenstion water that mixes ponding dish collection discharges fresh air induction system.
Optionally, the fresh air inducing device further comprises a fresh air water collecting disc and a flow guide pipe, the fresh air water collecting disc is installed in the casing, the fresh air water collecting disc is arranged below the fresh air heat exchanger, and the fresh air water collecting disc is used for collecting condensed water generated by the fresh air heat exchanger;
fresh air ponding dish with mix the ponding dish and pass through the honeycomb duct is connected, the honeycomb duct is used for with the comdenstion water that fresh air ponding dish was collected leads to mix the ponding dish.
Optionally, a pipeline with a U-shaped structure is arranged at a connection section of the draft tube connecting the fresh air water collecting tray and the mixed water collecting tray.
Optionally, the fresh air inducing device further comprises a heat insulating layer, wherein the heat insulating layer is made of heat insulating materials and covers part of the inner wall of the shell.
Optionally, the fresh air induction device further comprises a constant air volume valve installed on the shell, the shell is connected with the fresh air inlet pipe through the constant air volume valve, and the constant air volume valve is used for controlling the air volume of the fresh air entering the shell.
Optionally, both the induction heat exchanger and the fresh air heat exchanger are inclined with respect to a horizontal plane.
Optionally, the system further comprises a tail end heat exchanger and/or a front end heat exchanger;
the tail end heat exchanger is arranged in the shell and close to the air supply outlet, and is used for heating or humidifying the mixed air;
the front-end heat exchanger is arranged in the shell and is close to the air return opening, and the front-end heat exchanger is used for heating or humidifying the air entering from the air return opening.
Optionally, the air supply outlet comprises a blade, and the angle of the blade can be adjusted.
Optionally, the number of the fresh air inducing devices is at least two, and at least two of the fresh air inducing devices are arranged in series.
The utility model provides a new trend induction system has following advantage:
firstly, the fresh air induction device provided by the utility model is provided with the fresh air heat exchanger, so that the fresh air is heated or refrigerated or dehumidified to obtain the pretreated fresh air, the mixed air obtained by mixing the follow-up air with the pretreated air is more uniform, the speed of processing the indoor air can be accelerated, and the indoor environment can be regulated and controlled more quickly, so as to meet the demand of people on rapidly reaching the comfortable environment to the indoor air conditioning environment;
the fresh air inducing device provided by the utility model has the functions of condensate water discharge and dehumidification, and the fresh air water collecting disc and the mixed water collecting disc are arranged to collect the condensate water generated during the operation of the fresh air heat exchanger and the induced heat exchanger and discharge the condensate water out of the fresh air inducing device through the drain pipe; on one hand, condensed water can be prevented from dripping into the room from an air supply outlet or an air return inlet, and user experience is prevented from being influenced; on the other hand, due to the addition of the function of discharging condensed water, when the fresh air heater and the induction heat exchanger are of a coil pipe structure, the temperature of a medium introduced into a coil pipe is lower without worrying about the generation of condensed water, and the fresh air and the vapor in the air are subjected to a low-temperature coil pipe to generate a moisture precipitation reaction, so that the dehumidification effect is realized;
thirdly, the fresh air inducing device provided by the utility model is provided with a front end heat exchanger and/or a tail end heat exchanger; the front-end heat exchanger can heat or humidify the air entering from the air return opening, and the tail-end heat exchanger can reprocess the mixed air; when the fresh air heater and the induction heat exchanger are of coil structures, the temperature of media introduced into a coil pipeline can be lower, the adjustable range of mixed air to indoor temperature is enlarged, and the working power of the fresh air induction device is further increased; under the condition of higher humidity, the fresh air can be refrigerated through the fresh air heat exchanger, the induction heat exchanger is closed, and then the air entering from the air return port is heated through the front end heat exchanger, so that the indoor temperature and humidity can reach a more appropriate state.
Drawings
Fig. 1 is a schematic view of an internal structure of a fresh air inducing device according to a preferred embodiment of the present invention;
fig. 2 is an appearance schematic diagram of a fresh air inducing device according to a preferred embodiment of the present invention.
Wherein the reference numerals are as follows:
101-a housing; 102-an insulating layer; 103-fixed air volume valve; 104-fresh air water accumulation plate; 105-air return; 106-a flow guide pipe; 107-induction heat exchanger; 108-air supply outlet; 109-end heat exchanger; 110-fresh air heat exchanger; 111-a mixed water tray; 112-a nozzle; 113-a drain pipe; 201-fresh air inlet pipe.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the form, quantity and proportion of each component in actual implementation may be changed at will, and the layout of the components may be more complicated.
Furthermore, each embodiment described below has one or more technical features, which does not mean that all technical features of any embodiment need to be implemented simultaneously by a person using the present invention, or that all technical features of different embodiments can be implemented separately. In other words, in the implementation of the present invention, based on the disclosure of the present invention, and depending on design specifications or implementation requirements, a person skilled in the art can selectively implement some or all of the technical features of any embodiment, or selectively implement a combination of some or all of the technical features of a plurality of embodiments, thereby increasing the flexibility in implementing the present invention. In addition, as used in this specification, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise.
The core idea of the utility model is to provide a fresh air inducing device, which comprises a shell, a fresh air heat exchanger, a nozzle, an inducing heat exchanger, an air return inlet and an air supply outlet; the shell is connected with a fresh air inlet pipe; the fresh air heat exchanger, the nozzle and the induction heat exchanger are arranged in the shell, and the air return inlet and the air supply outlet are arranged on the shell; the fresh air heat exchanger is used for heating or refrigerating or dehumidifying fresh air entering the shell from the fresh air inlet pipe to obtain preprocessed fresh air; the induction heat exchanger is used for heating or refrigerating or dehumidifying the air entering the shell from the air return inlet to obtain pretreated air; the pretreated fresh air is mixed with the pretreated air after passing through the nozzle to obtain mixed air, and the mixed air is supplied through the air supply outlet. It should be understood that the treatment modes of the fresh air heat exchanger and the induction heat exchanger can be the same or different, but when the fresh air heat exchanger and the induction heat exchanger are in the coil structure of the same pipeline, the treatment modes of the fresh air heat exchanger and the induction heat exchanger are the same or one of the fresh air heat exchanger and the induction heat exchanger needs to be closed.
Fig. 1 is a schematic view of an internal structure of a fresh air inducing device according to a preferred embodiment of the present invention; fig. 2 is an appearance schematic diagram of a fresh air inducing device according to a preferred embodiment of the present invention.
As shown in fig. 1 and fig. 2, the present embodiment provides a fresh air inducing device, which is installed in a ceiling of an indoor room, and includes a housing 101, a fresh air heat exchanger 110, a nozzle 112, an inducing heat exchanger 107, an air return opening 105, and an air supply opening 108; the casing 101 is connected with a fresh air inlet pipe 201. The fresh air heat exchanger 110, the nozzle 112 and the induction heat exchanger 107 are all disposed in the casing 101, and the return air opening 105 and the supply air opening 108 are all disposed on the casing 101.
Furthermore, the fresh air induction device further comprises a constant air volume valve 103, the constant air volume valve 103 is installed on the shell 101, the shell 101 is connected with a fresh air inlet pipe 201 through the constant air volume valve 103, fresh air enters the shell 101 from the constant air volume valve 103 through the fresh air inlet pipe 201, and the fresh air inlet volume of the fresh air can be controlled through the constant air volume valve 103 according to the fresh air demand of indoor personnel. The set value of the constant air volume valve 103 is determined by the fresh air demand of indoor personnel, and the fresh air volume of each person can be guaranteed to be not less than 30m3H is used as the reference value. The utility model discloses do not do special restriction to the position of deciding air volume valve 103, can set up outside casing 101, can also set up in casing 101.
In practical application, after entering the casing 101, the fresh air is first heated, cooled or dehumidified by the fresh air heat exchanger 110 to obtain the pretreated fresh air. Preferably, the fresh air heat exchanger 110 is a coil structure, and includes fins and pipes, and the medium in the pipes may be water, or gaseous or other liquid refrigerant. On prior art's basis, the utility model discloses increased new trend heat exchanger 110, carried out the preliminary treatment to the new trend and can accelerate the follow-up temperature and the humidity control to the mixed wind, temperature and humidity in the adjustment room that can be better to improve indoor environment's travelling comfort.
In addition, after the pretreated fresh air passes through the nozzle 112, the wind speed is increased, and according to the bernoulli equation, negative pressure is formed around the nozzle 112, so that the air in the room is induced to enter the shell 101 from the air return opening 105. Under the condition of no fan, the air supply of the air conditioner with the air quantity 6 times that of the fresh air can be realized through high-speed fresh air induction, the effects of temperature regulation and fresh air supplement are realized, and basic conditions are provided for realizing the comfortable environment of the traditional large public space central air conditioner in a narrow space. The utility model discloses do not do special restriction to the structure of return air inlet 105, return air inlet 105 can design into the grid of installation on the furred ceiling, also can combine the interior decoration design to do the trompil of other forms, only need guarantee that the trompil area can satisfy the requirement of return air wind speed can.
The induction heat exchanger 107 is used for heating or refrigerating or dehumidifying the air entering the housing 101 from the return air inlet 105 to obtain the pre-treated air. In addition, the pre-treated fresh air passes through the nozzle 112 and then is mixed with the pre-treated air to obtain mixed air. In this way, the air conditioner fan does not need to be installed indoors by utilizing an induction mode, and noise is avoided. Preferably, the induction heat exchanger 107 is a coil structure, and includes fins and tubes, and the medium in the tubes may be water, or gaseous or other liquid refrigerant.
In summer or plum rain season, due to the fact that the dew point temperature of the fresh air is high, moisture of the air is separated out, and condensate water is generated. Preferably, the fresh air inducing device further comprises a mixing water tray 111 and a drain pipe 113. Wherein, the mixed water-collecting tray 111 is installed in the shell 101, the mixed water-collecting tray 111 is arranged below the induction heat exchanger 107, and the mixed water-collecting tray 111 is used for collecting the condensed water generated by the induction heat exchanger 107 in operation. The drain pipe 113 is connected to the mixed drip tray 111, and condensed water collected by the mixed drip tray 111 can be discharged out of the chilled beam assembly through the drain pipe 113.
Further, the fresh air inducing device further comprises a fresh air water accumulating plate 104 and a guide pipe 106. Fresh air water accumulation plate 104 is installed in casing 101, and fresh air water accumulation plate 104 sets up the below at fresh air heat exchanger 110, and fresh air water accumulation plate 104 is used for collecting the comdenstion water that fresh air heat exchanger 110 produced in the work. The honeycomb duct 106 is connected with the mixed ponding dish 111, the fresh air ponding dish 104 is connected with the mixed ponding dish through 111 through the honeycomb duct 106, and the honeycomb duct 106 also leads the condensate water collected by the fresh air ponding dish 104 to the mixed ponding dish 111 to collect the drainage in a unified way. Furthermore, the fresh air inducing device is discharged together by a drain pipe 113 connected to the mixed water collecting tray 111.
Preferably, the connecting section of the draft tube 106 connecting the fresh air water collecting tray 104 and the mixed water collecting tray 111 is designed as a pipeline with a U-shaped structure. The reason is that the fresh air and water accumulating disk 104 and the mixed water accumulating disk 111 have different air pressures and static pressure difference, and the U-shaped structure of the draft tube 106 can prevent the fresh air from leaking from the draft tube 106 and directly discharging out of the fresh air inducing device.
Furthermore, the induction heat exchanger 107 and the fresh air heat exchanger 110 are both obliquely arranged relative to the horizontal plane, so that the surface areas of the induction heat exchanger 107 and the fresh air heat exchanger 110 can be increased, and more fins and pipelines can be arranged; on the other hand, the induction heat exchanger 107 and the fresh air heat exchanger 110 are obliquely arranged, so that the generated condensate water can be converged to the lower parts of the induction heat exchanger 107 and the fresh air heat exchanger 110 respectively, and the sizes of the mixed water collecting disc 111 and the fresh air water collecting disc 104 can be reduced.
After the pretreatment fresh air and the pretreatment air are mixed, the obtained mixed air is sent into the room through the air supply outlet 108. The air supply airflow organization of the fresh air induction device is more uniform, and the air supply speed can be kept at 1-3 m/s. The air supply outlet 108 is used for adjusting the air flow organization, and the air is supplied to the activity area of the personnel at a lower air speed and temperature difference, so that the air supply is more comfortable. Preferably, the supply air opening 108 includes a blade, and an angle of the blade is adjustable. Through the blade angle of adjustment supply-air outlet 108, change the air supply direction, can guide the air supply direction of mixing the wind, preferably, make the attached in furred ceiling of wind, realize the effect of comfortable air supply. Especially, when cold air is sent in summer, the mixed air can be guided to be horizontally and uniformly sent out by adjusting the angle of the blades, an attached wall is formed on the surface of an indoor building, the mixed air moves along the ceiling and the side wall to form a coanda effect, and the air conditioning air is prevented from directly blowing to a human body. The mixed air fully mixes the indoor air in the air supply process, the air speed and the temperature difference of the personnel activity area are reduced, cold wind feeling on the personnel is avoided, and the comfortable effect of no blowing feeling is achieved.
This fresh air induction device realizes indoor partial air cycle through the fresh air induction, compares with the conventional art, does not have fan and other power equipment, does not have mechanical noise, has solved traditional central air conditioning's equipment noise problem. Meanwhile, the air is supplied in a centralized manner, so that the energy consumption of the air conditioner is reduced, and the energy-saving effect can be realized.
Preferably, the fresh air inducing device further comprises a terminal heat exchanger 109 and/or a front end heat exchanger (not shown). The end heat exchanger 109 is disposed in the casing 101 at a position close to the air supply outlet 108; the end heat exchanger 109 is used to heat or humidify the mixed air before blowing. The front-end heat exchanger is arranged in the casing 101 and close to the air return opening 105, and is used for heating or humidifying the air entering from the air return opening 105.
The operation modes of the end heat exchanger 109 and the front heat exchanger are set according to the indoor temperature and humidity and are freely adjusted by indoor personnel. In practical applications, when the fresh air heat exchanger 110 and the induction heat exchanger 107 are coil structures, the same pipeline is used, that is, when the fresh air heat exchanger 110 and the induction heat exchanger 107 work simultaneously, only cooling or heating can be performed simultaneously. Especially, under the condition of high humidity, the fresh air can be refrigerated by the fresh air heat exchanger 110, the induction heat exchanger 107 is closed, and the air entering from the air return opening 105 is heated by the front end heat exchanger, so that the indoor temperature and humidity can reach the appropriate state.
The utility model does not limit the specific structure of the end heat exchanger 109 and the front end heat exchanger, the end heat exchanger 109 and the front end heat exchanger can be electric heating structures, and can also be coil structures or other components; when the end heat exchanger 109 and the front heat exchanger are in a coil structure, including fins and tubes, the medium in the tubes may be water, or a gaseous or other liquid refrigerant.
Furthermore, the fresh air inducing device further comprises an insulating layer 102, wherein the insulating layer 102 is made of an insulating material and covers part of the inner wall of the shell 101. As shown in fig. 1, preferably, the insulating layer 102 covers the inner wall of the area where the fresh air enters and is pretreated in the casing 101, so that the contact between the fresh air, the mixed air and the indoor air can be effectively isolated, and the phenomenon of cold bridge generation and condensation on the surface of the casing 101 can be avoided.
The quantity of the new trend induction system that this embodiment provided can more than or equal to two, sets up through the series connection between at least two new trend induction system. One end of the shell of the first fresh air inducing device is connected with a fresh air inlet pipe 201; the other end of the shell of the first fresh air inducing device is connected with one end of the shell of the second fresh air inducing device, which is connected with a fresh air inlet pipe; the other end of the shell of the second fresh air inducing device is connected with one end of the shell of the third fresh air inducing device, which is connected with a fresh air inlet pipe; by analogy, the other end of the tail-end fresh air induction device is plugged by an end cover or connected with a fresh air outlet pipe. When facing great indoor space, establish ties a plurality of new trend induction system and can avoid arranging extra tuber pipe in the furred ceiling, the installation is convenient and can reach fast again comfortable air supply effect. Usually in practical application, can use three new trend induction system at most in series, and further, when not needing all new trend induction system to work together, can realize some new trend induction system work through increasing the end cover and blocking up between new trend induction system.
Claims (10)
1. A fresh air induction device is characterized by comprising a shell, a fresh air heat exchanger, a nozzle, an induction heat exchanger, an air return inlet and an air supply outlet; the shell is connected with a fresh air inlet pipe; the fresh air heat exchanger, the nozzle and the induction heat exchanger are all arranged in the shell, and the air return inlet and the air supply outlet are arranged on the shell;
the fresh air heat exchanger is used for heating or refrigerating or dehumidifying the fresh air entering the shell from the fresh air inlet pipe to obtain pretreated fresh air;
the induction heat exchanger is used for heating or refrigerating or dehumidifying the air entering the shell from the air return inlet to obtain pretreated air;
the pretreatment fresh air passes through the nozzle and then is mixed with the pretreatment air to obtain mixed air, and the mixed air is supplied through the air supply outlet.
2. The fresh air induction device according to claim 1, further comprising a mixed water tray and a drain pipe; the mixed water accumulation disc is arranged in the shell and below the induction heat exchanger, and is used for collecting condensed water generated by the induction heat exchanger;
the drain pipe with mix ponding dish and be connected for with the comdenstion water that mixes ponding dish collection discharges fresh air induction system.
3. The fresh air induction device according to claim 2, further comprising a fresh air water accumulation disc and a flow guide pipe, wherein the fresh air water accumulation disc and the flow guide pipe are installed in the shell, the fresh air water accumulation disc is arranged below the fresh air heat exchanger, and the fresh air water accumulation disc is used for collecting condensed water generated by the fresh air heat exchanger;
fresh air ponding dish with mix the ponding dish and pass through the honeycomb duct is connected, the honeycomb duct is used for with the comdenstion water that fresh air ponding dish was collected leads to mix the ponding dish.
4. The fresh air induction device according to claim 3, wherein a U-shaped pipeline is arranged at the connecting section of the draft tube connecting the fresh air water collecting tray and the mixed water collecting tray.
5. The fresh air induction device according to claim 1, further comprising an insulating layer made of an insulating material covering a portion of the inner wall of the housing.
6. The fresh air induction device according to claim 1, further comprising a constant air volume valve mounted on the housing, wherein the housing is connected to the fresh air inlet pipe through the constant air volume valve, and the constant air volume valve is used for controlling the volume of fresh air entering the housing.
7. A fresh air induction device according to any one of claims 2 to 4 wherein the induction heat exchanger and the fresh air heat exchanger are both inclined to the horizontal.
8. The fresh air induction device according to claim 1, further comprising a terminal heat exchanger and/or a front end heat exchanger;
the tail end heat exchanger is arranged in the shell and close to the air supply outlet, and is used for heating or humidifying the mixed air;
the front-end heat exchanger is arranged in the shell and is close to the air return opening, and the front-end heat exchanger is used for heating or humidifying the air entering from the air return opening.
9. The fresh air induction device according to claim 1, wherein the air supply opening includes a blade, and an angle of the blade is adjustable.
10. The fresh air induction device according to claim 1, wherein the number of the fresh air induction devices is at least two, and at least two of the fresh air induction devices are arranged in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121267660.8U CN215175486U (en) | 2021-06-07 | 2021-06-07 | Fresh air induction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121267660.8U CN215175486U (en) | 2021-06-07 | 2021-06-07 | Fresh air induction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215175486U true CN215175486U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121267660.8U Active CN215175486U (en) | 2021-06-07 | 2021-06-07 | Fresh air induction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215175486U (en) |
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2021
- 2021-06-07 CN CN202121267660.8U patent/CN215175486U/en active Active
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