CN217817436U - Heating device - Google Patents
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- CN217817436U CN217817436U CN202221564101.8U CN202221564101U CN217817436U CN 217817436 U CN217817436 U CN 217817436U CN 202221564101 U CN202221564101 U CN 202221564101U CN 217817436 U CN217817436 U CN 217817436U
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Abstract
The utility model discloses a heating device, a heater of the device is arranged at the lower part of a shell; the first end of the water inlet pipeline can be connected with an external water storage container, and the second end of the water inlet pipeline is connected with the normally closed end of the first three-way electromagnetic valve; the water inlet of the transmission device is connected with the common end of the first three-way electromagnetic valve, and the water outlet of the transmission device is connected with the common end of the second three-way electromagnetic valve; the water suction pipeline is connected with the accommodating cavity and the normally open end of the first three-way electromagnetic valve; the first end of the water outlet pipeline is connected with the normally closed end of the second three-way electromagnetic valve, and the second end of the water outlet pipeline can be communicated with an external water container; the water supply pipeline is connected with the normally open end and the containing cavity of the second three-way electromagnetic valve. Therefore, the functions of cold water outlet, hot water outlet and steam outlet can be realized by starting and stopping the first three-way electromagnetic valve, the transmission device and the second three-way electromagnetic valve. Meanwhile, the functions of evacuating residual hot water in the accommodating cavity, cleaning the accommodating cavity and descaling the accommodating cavity can be realized.
Description
Technical Field
The utility model relates to a liquid heating technical field especially relates to a heating device.
Background
Inside organisms such as water dispenser, machine of making tea, coffee machine, extraction machine, all there is heating device, for example water heating device, traditional water heating device, or the inside ponding of heater can't be discharged, or install a spiral cover on the heater, unscrew sealed lid when needing evacuation water, the water evacuation of the inside. And traditional water heating device effect is single, only can through the heater, to water heating or boil water, emits hot water or emits steam through steam density through gravity, need swing the machine and just can release water, has the risk of being scalded and damaging the machine.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to at least one defect that prior art exists, a heating device is provided.
The utility model provides a technical scheme that its technical problem adopted is: the heating device comprises a water inlet pipeline, a water suction pipeline, a first three-way electromagnetic valve, a transmission device, a second three-way electromagnetic valve, a water outlet pipeline, a water replenishing pipeline, a shell with an accommodating cavity and a heater, wherein the water inlet pipeline is arranged on the shell;
the heater is arranged at the lower part of the shell; the first end of the water inlet pipeline can be connected with an external water storage container, and the second end of the water inlet pipeline is connected with the normally closed end of the first three-way electromagnetic valve; the water inlet of the transmission device is connected with the common end of the first three-way electromagnetic valve, and the water outlet of the transmission device is connected with the common end of the second three-way electromagnetic valve; the water suction pipeline is connected with the accommodating cavity and the normally open end of the first three-way electromagnetic valve; the first end of the water outlet pipeline is connected with the normally closed end of the second three-way electromagnetic valve, and the second end of the water outlet pipeline can be communicated with an external water container; and the water supplementing pipeline is connected with the normally open end of the second three-way electromagnetic valve and the accommodating cavity.
Preferably, in the heating device of the present invention, the heating device further includes a steam outlet pipe, the steam outlet pipe is connected to the external water container and the steam outlet hole at the top of the accommodating cavity.
Preferably, in the heating device of the present invention, the heating device further includes an exhaust switch valve disposed on the steam outlet pipeline.
Preferably, heating device in, heating device still include certainly holding chamber top extends to the pipe that absorbs water of holding intracavity bottom, absorb water the pipe with the pipeline that absorbs water is connected.
Preferably, in the heating device of the present invention, the heating device further includes a filtering member disposed at the bottom of the barrel.
Preferably, in the heating device of the present invention, the heating device further includes an air inlet hole formed at the top of the accommodating chamber and an air inlet switch valve disposed on the air inlet hole.
Preferably, in the heating device of the present invention, the heating device further includes a temperature sensor; the temperature sensor is lengthwise and is vertically arranged in the accommodating cavity, and the length of the temperature sensor is the set water level depth;
the water level detection device further comprises a circuit board which is respectively electrically connected with the heater, the temperature sensor, the first three-way electromagnetic valve, the transmission device and the second three-way electromagnetic valve and used for judging whether the water in the accommodating cavity reaches a set water level depth or not by detecting the voltage difference between the heater and the temperature sensor.
Preferably, in the heating device of the present invention, the circuit board is electrically connected to the heater, the temperature sensor, the first three-way solenoid valve, the transmission device and the second three-way solenoid valve through a flat cable.
Preferably, in the heating apparatus of the present invention, the temperature sensor includes a conductive housing; the circuit board is electrically connected with the conductive shell of the temperature sensor.
Preferably, in the heating device of the present invention, the housing includes a conductive base and an insulating top cover;
the heater is arranged on the conductive base, and the temperature sensor is arranged on the insulating top cover in a penetrating way;
the circuit board is electrically connected with the heater through the conductive base.
Through implementing the utility model discloses, following beneficial effect has:
the utility model discloses a design a heating device, including inlet channel, water absorption pipeline, first three way solenoid valve, transmission device, second three way solenoid valve, outlet conduit, moisturizing pipeline, have the casing and the heater in holding chamber. Specifically, the heater is arranged at the lower part of the shell; the first end of the water inlet pipeline can be connected with an external water storage container, and the second end of the water inlet pipeline is connected with the normally closed end of the first three-way electromagnetic valve; the water inlet of the transmission device is connected with the common end of the first three-way electromagnetic valve, and the water outlet of the transmission device is connected with the common end of the second three-way electromagnetic valve; the water suction pipeline is connected with the accommodating cavity and the normally open end of the first three-way electromagnetic valve; the first end of the water outlet pipeline is connected with the normally closed end of the second three-way electromagnetic valve, and the second end of the water outlet pipeline can be communicated with an external water container; the water supply pipeline is connected with the normally open end and the containing cavity of the second three-way electromagnetic valve. Therefore, the functions of cold water outlet, hot water outlet and steam outlet can be realized by starting and stopping the first three-way electromagnetic valve, the transmission device and the second three-way electromagnetic valve. Meanwhile, the functions of evacuating residual hot water in the accommodating cavity, cleaning the accommodating cavity and descaling the accommodating cavity can be realized.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
FIG. 1 is a schematic diagram of a heating device according to the present invention;
FIG. 2 is a structural diagram of the heating device of the present invention;
fig. 3 is an exploded view of the heating part of the heating device of the present invention;
FIG. 4 is an exploded view of the heating part of the heating device of the present invention;
fig. 5 is a schematic diagram of the heating device of the present invention, in which the circuit board is electrically connected to the heater, the temperature sensor, the first three-way solenoid valve, the transmission device and the second three-way solenoid valve.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
It should be noted that the flow charts shown in the drawings are only exemplary and do not necessarily include all the contents and operations/steps, nor must they be executed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.
The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.
As shown in fig. 1-4, the present embodiment discloses a heating device, which includes a water inlet pipe 2, a water suction pipe 3, a first three-way electromagnetic valve 4, a transmission device 5, a second three-way electromagnetic valve 6, a water outlet pipe 7, a water replenishing pipe 8, a housing 12 with a containing cavity, and a heater 13.
The heater 13 is arranged at the lower part of the shell 12; a first end of the water inlet pipeline 2 can be connected with the external water storage container 1, and a second end of the water inlet pipeline 2 is connected with a normally closed end of the first three-way electromagnetic valve 4; a water inlet of the transmission device 5 is connected with a common end of the first three-way electromagnetic valve 4, and a water outlet of the transmission device 5 is connected with a common end of the second three-way electromagnetic valve 6; the water suction pipeline 3 is connected with the accommodating cavity and the normally open end of the first three-way electromagnetic valve 4; the first end of the water outlet pipeline 7 is connected with the normally closed end of the second three-way electromagnetic valve 6, and the second end of the water outlet pipeline 7 can be communicated with the external water container 11; the water supply pipeline 8 is connected with the normally open end and the containing cavity of the second three-way electromagnetic valve 6. For example, the transmission device 5 is a water pump, the external water storage container 1 is a water tank, and the external water container 11 is a water cup.
In some embodiments, the heating device further comprises a steam outlet pipe 9, and the steam outlet pipe 9 is connected with the outer water container 11 and a steam outlet hole 18 at the top of the accommodating cavity. Preferably, to avoid the backflow of steam, the heating device further comprises an exhaust switching valve 10, such as a one-way valve or a solenoid valve, provided on the outlet steam duct 9, which is opened when exhaust is required. Wherein, a first end of the water outlet pipe 7 connected with the external water container 11 is provided with a water nozzle, and one end of the steam outlet pipe 9 connected with the external water container 11 is provided with a steam nozzle.
In some embodiments, in order to completely pump out the water inside the accommodating cavity and prevent the residual water inside the heating device from deteriorating and polluting the heating device after the heating device is used, the heating device further includes a water suction pipe 23 extending from the top of the accommodating cavity to the bottom of the accommodating cavity, and the water suction pipe 23 is connected with the water suction pipeline 3. Preferably, in order to avoid the scale inside the containing cavity from being drawn into the pipeline to cause blockage, the heating device further comprises a filter 24 arranged at the bottom of the suction pipe 23.
Specifically, this heating device is still including locating moisturizing hole 16, apopore 17 and the steam outlet 18 at holding chamber top, and moisturizing pipeline 8 is connected with moisturizing hole 16, and pipeline 3 and the pipe 23 that absorbs water are connected with apopore 17 respectively, and steam outlet 9 is connected with steam outlet 18.
In some embodiments, in order to avoid excessive negative pressure generated when water in the device is discharged and water cannot be discharged, the heating device further comprises an air inlet 19 arranged at the top of the accommodating cavity and an air inlet switch valve 20, such as a one-way valve or a solenoid valve, arranged on the air inlet 19, and the solenoid valve is opened when air inlet is required.
In some embodiments, as shown in fig. 3 and 5, the heating device further comprises a temperature sensor 15 and a circuit board 14. The temperature sensor 15 is lengthwise and is vertically arranged in the accommodating cavity, and the length of the temperature sensor 15 is the set water level depth; the circuit board 14 is electrically connected with the heater 13 and the temperature sensor 15, and the circuit board 14 is used for detecting the voltage difference between the heater 13 and the temperature sensor 15 so as to judge whether the water in the accommodating cavity reaches the set water level depth. The circuit board 14 is also electrically connected to the first three-way solenoid valve 4, the transmission device 5, and the second three-way solenoid valve 6, and is configured to supply power to the first three-way solenoid valve 4, the transmission device 5, and the second three-way solenoid valve 6. For example, the circuit board is a power PCB board.
The water level detection device is designed according to the difference of the resistivity of water and gas, and the height of the water level is judged by using the electrodes, so that the water level detection structure is simplified, and the cost is reduced.
When the voltage difference between the two ends of the heater 13 and the temperature sensor 15 is greater than a preset threshold value, indicating that the water is not filled; when the voltage across the terminals is less than a predetermined threshold, it indicates that the water is full. The maximum voltage difference between the two terminals is the input power voltage, for example, the preset threshold is 4V, and the maximum voltage difference is 5V.
In some embodiments, the circuit board 14 is electrically connected to the heater 13, the temperature sensor 15, the first three-way solenoid valve 4, the transmission device 5, and the second three-way solenoid valve 6 by a flat cable. For example, 2PIN strips are merely examples, and other connection means may be used in other embodiments.
In some embodiments, the temperature sensor 15 includes a conductive housing 151, such as a metal housing, and the circuit board 14 is electrically connected to the conductive housing 151 of the temperature sensor 15.
In some embodiments, the housing 12 includes a conductive base 121 and an insulating cap 122, such as a metal base. The heater 13 is arranged at the lower part of the conductive base 121, the temperature sensor 15 is arranged on the insulating top cover 122 in a penetrating way, and the water replenishing hole 16, the water outlet hole 17, the steam outlet hole 18 and the air inlet hole 19 are all arranged on the insulating top cover 122. Further, the circuit board 14 is electrically connected to the heater 13 through the conductive base 121.
Accordingly, a first polarity terminal 152, such as a positive terminal, is provided on the conductive housing 151 for electrical connection with the circuit board 14. The conductive base 121 is provided with a second polarity terminal 131, such as a negative terminal, electrically connected to the circuit board 14.
In some embodiments, to ensure the sealing property, a first sealing member 21, such as a sealing ring, is disposed between the base 121 and the insulating cap 122. A second seal 22, such as a gland, is provided between the temperature sensor 15 and the insulating cap 122.
On the basis of any one of the embodiments of the heating device, the embodiment also discloses a control method of the heating device, which comprises the following steps:
and (3) cold water discharging step: the water inlet pipeline 2 is connected with the external water storage container 1, the water outlet pipeline 7 is communicated with the external water container 11, the first three-way electromagnetic valve 4, the second three-way electromagnetic valve 6 and the transmission device 5 are controlled to be electrified according to a received cold water outlet instruction, and water in the external water storage container 1 is transmitted to the external water container 11 through the water inlet pipeline 2 and the water outlet pipeline 7. And when the amount of the cold water is enough, the first three-way electromagnetic valve 4, the second three-way electromagnetic valve 6 and the transmission device 5 can be controlled to be powered off according to the received stop instruction.
Or, water replenishing step: the water pipeline is connected with the external water storage container 1, the first three-way electromagnetic valve 4 and the transmission device 5 are controlled to be electrified according to the received water supplementing instruction, and water in the external water storage container 1 is transmitted to the accommodating cavity through the water inlet pipeline 2 and the water supplementing pipeline 8. In some embodiments, the water replenishing amount may be controlled according to the received water replenishing instruction and a preset water replenishing time, or according to the received water replenishing instruction containing the water replenishing amount.
Or, water pumping: and controlling the second three-way electromagnetic valve 6 and the transmission device 5 to be electrified according to the received pumping instruction, transmitting the water in the accommodating cavity into the external water container 11 through the water suction pipeline 3 and the water outlet pipeline 7, and simultaneously automatically opening the air inlet switch valve 20. And when the water pumping amount is enough, the second three-way electromagnetic valve 6 and the transmission device 5 can be controlled to be powered off according to the received stopping instruction, and meanwhile, the air inlet switch valve 20 is automatically closed. And the heater 13 can be controlled to be switched on or off according to the temperature value sent by the temperature sensor 15, so as to reach the set temperature of the pumped water. Wherein, the water in the holding chamber can be the hot water after heater 13 heats, takes out the hot water in the holding chamber through the step of drawing water clean, avoids heater 13 to use the back remaining water in the holding chamber to deteriorate, pollutes heating device. The water in the accommodating cavity can also be clean water, the clean water in the water storage container is added into the accommodating cavity for multiple times through the water supplementing step, and then the clean water in the accommodating cavity is pumped out through the water pumping step, so that the function of cleaning the accommodating cavity can be realized. The water storage container can be added with a water softener or a scale removing liquid to remove the scale in the accommodating cavity, so that the scale removing function of the accommodating cavity is realized.
Or, a heating steam-out step: and controlling the heater 13 to be started according to the received heating steam outlet instruction so as to heat water in the accommodating cavity, automatically opening the exhaust switch valve 10 after the water is boiled, and spraying steam out through the steam outlet pipeline 9. And controls the heater 13 to be turned off according to a preset steam outlet time or other instructions.
On the basis of any one of the embodiments of the heating device, the embodiment also discloses a control method of the heating device, which comprises the following steps:
and (3) cold water discharging step: the water inlet pipeline 2 is connected with the external water storage container 1, the water outlet pipeline 7 is communicated with the external water container 11, the circuit board 14 controls the first three-way electromagnetic valve 4, the second three-way electromagnetic valve 6 and the transmission device 5 to be electrified according to a received cold water outlet instruction, and water in the external water storage container 1 is transmitted to the external water container 11 through the water inlet pipeline 2 and the water outlet pipeline 7. And when the amount of the cold water is enough, the circuit board 14 can control the first three-way electromagnetic valve 4, the second three-way electromagnetic valve 6 and the transmission device 5 to be powered off according to the received stop instruction.
Or, water replenishing step: the water pipeline is connected with the external water storage container 1, the circuit board 14 controls the first three-way electromagnetic valve 4, the transmission device 5, the heater 13 and the temperature sensor 15 to be electrified according to the received water supplementing instruction, and water in the external water storage container 1 is transmitted into the accommodating cavity through the water inlet pipeline 2 and the water supplementing pipeline 8. And when the circuit board 14 detects that the water in the accommodating cavity reaches the set water level depth, the first three-way electromagnetic valve 4 and the transmission device 5 are controlled to be powered off.
Or, water pumping: the circuit board 14 controls the second three-way electromagnetic valve 6 and the transmission device 5 to be electrified according to the received pumping instruction, so that the water in the accommodating cavity is transmitted to the external water container 11 through the water suction pipeline 3 and the water outlet pipeline 7, and simultaneously the air inlet switch valve 20 is automatically opened. And when the water pumping amount is enough, the circuit board 14 can control the second three-way electromagnetic valve 6 and the transmission device 5 to be powered off according to the received stop instruction, and the air inlet switch valve 20 is automatically closed. And the heater 13 can be controlled to be switched on and off according to the temperature value sent by the temperature sensor 15, so as to reach the set temperature of the extracted water. Wherein, the water in the holding chamber can be the hot water after heater 13 heats, takes out the hot water in the holding chamber through the step of drawing water clean, avoids heater 13 to use the back remaining water in the holding chamber to deteriorate, pollutes heating device. The water in the accommodating cavity can also be clean water, the clean water in the water storage container is added into the accommodating cavity for multiple times through the water supplementing step, and then the clean water in the accommodating cavity is pumped out through the water pumping step, so that the function of cleaning the accommodating cavity can be realized. The water storage container can be added with a water softener or a scale removing liquid to remove the scale in the accommodating cavity, so that the scale removing function of the accommodating cavity is realized.
Or, a heating steam-out step: the circuit board 14 controls the heater 13 to be started to heat the water in the accommodating cavity according to a received steam heating instruction or when detecting that the water in the accommodating cavity reaches a set water level depth, the exhaust switch valve 10 is automatically opened after the water is boiled, and steam is sprayed out through the steam outlet pipeline 9. And controls the heater 13 to be turned off according to a preset steam outlet time or other instructions.
It should be noted that the cold water outlet instruction, the stop instruction, the water replenishing instruction, the water pumping instruction and the steam heating instruction are all instructions input by a user through voice or input on a touch panel or input on a key.
Through implementing the utility model discloses, following beneficial effect has:
the utility model discloses a design a heating device, include inlet channel, water absorption pipe, first three way solenoid valve, transmission device, second three way solenoid valve, outlet conduit, moisturizing pipeline, have the casing and the heater in holding chamber. Specifically, the heater is arranged at the lower part of the shell; the first end of the water inlet pipeline can be connected with an external water storage container, and the second end of the water inlet pipeline is connected with the normally closed end of the first three-way electromagnetic valve; the water inlet of the transmission device is connected with the common end of the first three-way electromagnetic valve, and the water outlet of the transmission device is connected with the common end of the second three-way electromagnetic valve; the water suction pipeline is connected with the accommodating cavity and the normally open end of the first three-way electromagnetic valve; the first end of the water outlet pipeline is connected with the normally closed end of the second three-way electromagnetic valve, and the second end of the water outlet pipeline can be communicated with an external water container; the water supply pipeline is connected with the normally open end and the containing cavity of the second three-way electromagnetic valve. Therefore, the functions of cold water outlet, hot water outlet and steam outlet can be realized by starting and stopping the first three-way electromagnetic valve, the transmission device and the second three-way electromagnetic valve. Meanwhile, the functions of evacuating residual hot water in the accommodating cavity, cleaning the accommodating cavity and descaling the accommodating cavity can be realized.
It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.
Claims (10)
1. A heating device is characterized by comprising a water inlet pipeline (2), a water suction pipeline (3), a first three-way electromagnetic valve (4), a transmission device (5), a second three-way electromagnetic valve (6), a water outlet pipeline (7), a water replenishing pipeline (8), a shell (12) with an accommodating cavity and a heater (13);
the heater (13) is arranged at the lower part of the shell (12); the first end of the water inlet pipeline (2) can be connected with an external water storage container (1), and the second end of the water inlet pipeline (2) is connected with the normally closed end of the first three-way electromagnetic valve (4); a water inlet of the transmission device (5) is connected with a common end of the first three-way electromagnetic valve (4), and a water outlet of the transmission device (5) is connected with a common end of the second three-way electromagnetic valve (6); the water suction pipeline (3) is connected with the containing cavity and the normally open end of the first three-way electromagnetic valve (4); the first end of the water outlet pipeline (7) is connected with the normally closed end of the second three-way electromagnetic valve (6), and the second end of the water outlet pipeline (7) can be communicated with an external water container (11); and the water supplementing pipeline (8) is connected with the normally open end of the second three-way electromagnetic valve (6) and the accommodating cavity.
2. The heating device according to claim 1, characterized in that it further comprises a steam outlet duct (9), said steam outlet duct (9) being connected to an external water container (11) and to a steam outlet hole (18) at the top of said housing chamber.
3. The heating device according to claim 2, further comprising an exhaust switch valve (10) provided on the steam outlet duct (9).
4. The heating device according to claim 1, further comprising a suction pipe (23) extending from the top of the receiving chamber to the bottom of the receiving chamber, wherein the suction pipe (23) is connected to the suction pipe (3).
5. The heating device according to claim 4, characterized in that it further comprises a filter (24) arranged at the bottom of the suction pipe (23).
6. The heating device according to claim 1, further comprising an air inlet hole (19) formed at the top of the accommodating chamber, and an air inlet on-off valve (20) formed on the air inlet hole (19).
7. The heating device according to claim 1, characterized in that it further comprises a temperature sensor (15); the temperature sensor (15) is lengthwise and is vertically arranged in the accommodating cavity, and the length of the temperature sensor (15) is the set water level depth;
the water level detection device is characterized by further comprising a circuit board (14) which is respectively electrically connected with the heater (13), the temperature sensor (15), the first three-way electromagnetic valve (4), the transmission device (5) and the second three-way electromagnetic valve (6) and used for judging whether water in the accommodating cavity reaches a set water level depth or not by detecting the voltage difference between the heater (13) and the temperature sensor (15).
8. The heating device according to claim 7, wherein the circuit board (14) is electrically connected by means of a flat cable with the heater (13), the temperature sensor (15), the first three-way solenoid valve (4), the transmission device (5) and the second three-way solenoid valve (6).
9. The heating device according to claim 7, wherein the temperature sensor (15) comprises an electrically conductive housing (151); the circuit board (14) is electrically connected to the conductive housing (151) of the temperature sensor (15).
10. The heating device according to claim 7, wherein the housing (12) comprises an electrically conductive base (121) and an insulating top cover (122);
the heater (13) is arranged on the conductive base (121), and the temperature sensor (15) is arranged on the insulating top cover (122) in a penetrating manner;
the circuit board (14) is electrically connected with the heater (13) through the conductive base (121).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221564101.8U CN217817436U (en) | 2022-06-21 | 2022-06-21 | Heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221564101.8U CN217817436U (en) | 2022-06-21 | 2022-06-21 | Heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217817436U true CN217817436U (en) | 2022-11-15 |
Family
ID=83994344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221564101.8U Active CN217817436U (en) | 2022-06-21 | 2022-06-21 | Heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217817436U (en) |
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2022
- 2022-06-21 CN CN202221564101.8U patent/CN217817436U/en active Active
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