CN215175461U - Air treatment unit - Google Patents
Air treatment unit Download PDFInfo
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- CN215175461U CN215175461U CN202121449321.1U CN202121449321U CN215175461U CN 215175461 U CN215175461 U CN 215175461U CN 202121449321 U CN202121449321 U CN 202121449321U CN 215175461 U CN215175461 U CN 215175461U
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- heat exchanger
- air
- valve
- pipeline
- return
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 238000004891 communication Methods 0.000 claims description 6
- 239000003507 refrigerant Substances 0.000 abstract description 5
- 238000007791 dehumidification Methods 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 238000004378 air conditioning Methods 0.000 description 4
- 238000004887 air purification Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Abstract
The utility model discloses an air handling unit, which comprises an indoor unit and an outdoor unit; the indoor unit is provided with a hollow cavity, an air supply pipeline and an air return pipeline; a first heat exchanger, a throttle valve and a second heat exchanger are sequentially arranged in the hollow cavity from front to back; a three-way control valve is connected between the throttle valve and the second heat exchanger; the outdoor unit is provided with a compressor and a third heat exchanger connected with the second heat exchanger in parallel; the compressor, the second heat exchanger, the throttle valve, the three-way control valve and the first heat exchanger are sequentially connected in series; the third heat exchanger is connected between the compressor and the three-way control valve. The utility model discloses an air handling unit when dehumidifying the air, adjusts the flow that gets into the refrigerant in the second heat exchanger through the tee bend control valve, can adjust the temperature of second heat exchanger to realize air supply temperature's control.
Description
Technical Field
The utility model relates to an air purification handles technical field, especially relates to an air treatment unit.
Background
With the improvement of living standard of people, people have higher and higher requirements on indoor air quality, and some customers or specific environments need to dehumidify air.
In the prior art, a dehumidifier is often adopted to dehumidify air, but the existing dehumidifier only has a dehumidification function and cannot control the temperature of heating and air supply of the dehumidified air.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an air handling unit, it adjusts the flow that gets into the refrigerant in the second heat exchanger through the tee bend control valve to realize air supply temperature's control.
The technical scheme of the utility model provides an air handling unit, which comprises an indoor unit and an outdoor unit;
the indoor unit is provided with a hollow cavity, an air supply pipeline and an air return pipeline, the air return pipeline is positioned outside the hollow cavity, and the air supply pipeline passes through the hollow cavity;
fans are respectively arranged in the air supply pipeline and the air return pipeline;
a first heat exchanger, a throttle valve and a second heat exchanger are sequentially arranged in the hollow cavity from front to back;
a three-way control valve is connected between the throttle valve and the second heat exchanger;
the outdoor unit is provided with a compressor and a third heat exchanger connected with the second heat exchanger in parallel;
the compressor, the second heat exchanger, the throttle valve, the three-way control valve and the first heat exchanger are sequentially connected in series;
the third heat exchanger is connected between the compressor and the three-way control valve.
In one optional technical scheme, the outdoor unit is further provided with a four-way reversing valve;
two ends of the throttling valve are also connected with a first bypass pipe, and a first check valve is mounted on the first bypass pipe;
the outlet of the compressor is connected with the first valve port of the four-way reversing valve through a pipeline;
the second heat exchanger is connected with a second valve port of the four-way reversing valve through a pipeline;
the third heat exchanger is connected with a second valve port of the four-way reversing valve through a pipeline;
the third heat exchanger is connected with the three-way control valve through a pipeline;
a second one-way valve is arranged on the pipeline of the third heat exchanger connected with the three-way control valve, two ends of the second one-way valve are connected with a second bypass pipe, and a capillary tube is arranged on the second bypass pipe;
the first heat exchanger is connected with a third valve port of the four-way reversing valve through a pipeline;
the inlet of the compressor is connected with the fourth valve port of the four-way reversing valve through a pipeline.
In an optional technical scheme, a fourth heat exchanger for exchanging heat with an external water source is further installed in the hollow cavity, and the fourth heat exchanger is located on the front side of the first heat exchanger.
In one optional technical scheme, an input port of the fourth heat exchanger is connected with a water supply pipe, and an output port of the fourth heat exchanger is connected with a water return pipe;
and a communicating pipe for adjusting the size of water flow entering the fourth heat exchanger is connected between the water supply pipe and the water return pipe.
In an optional technical scheme, a three-way valve is arranged on the water return pipe, one end of the communicating pipe is connected with the water supply pipe, and the other end of the communicating pipe is connected with one valve port of the three-way valve.
In one optional technical scheme, a total heat exchanger core is installed in the indoor unit;
the air supply pipeline and the air return pipeline are crossed at the front side of the hollow cavity, and the full heat exchanger core is installed at the crossed position of the air supply pipeline and the air return pipeline.
In an optional technical solution, a bypass valve is arranged between the return air pipeline and the hollow chamber, and is used for allowing the airflow in the return air pipeline to enter the hollow chamber, and the bypass valve is located at the rear side of the total heat exchanger core and at the front side of the first heat exchanger.
In one optional technical scheme, an air inlet end of the air supply pipeline, an air supply end of the air supply pipeline and an air return end of the air return pipeline are respectively provided with an air purification device.
In one optional technical scheme, the fan in the air supply pipeline is positioned at an air supply end of the air supply pipeline;
the fan in the return air pipeline is positioned at the air exhaust end of the return air pipeline.
In one optional technical solution, the outdoor unit further includes a fan for dissipating heat of the third heat exchanger.
By adopting the technical scheme, the method has the following beneficial effects:
the utility model provides an air handling unit, when the air dehumidification, first heat exchanger release cold volume is to the air dehumidification of flowing through, and the air after the second heat exchanger heat release is heated the dehumidification, and the third heat exchanger heat release is used for taking away the heat that the compressor produced, adjusts the flow that gets into the refrigerant in the second heat exchanger through the tee bend control valve, can adjust the temperature of second heat exchanger to realize air supply temperature's control.
Drawings
Fig. 1 is a schematic structural diagram of an air handling unit according to an embodiment of the present invention;
FIG. 2 is a schematic view of a first port, a second port, a third port, and a fourth port of a four-way reversing valve;
FIG. 3 is a schematic view of Freon circulating in summer when air is dehumidified;
FIG. 4 is a schematic view of Freon circulating in winter when air needs to be heated.
Detailed Description
The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
As shown in fig. 1 to 4, an air handling unit according to an embodiment of the present invention includes an indoor unit 100 and an outdoor unit 200.
The indoor unit 100 includes a hollow chamber 101, a blowing duct 102, and a return duct 103, the return duct 103 being located outside the hollow chamber 101, and the blowing duct 102 passing through the hollow chamber 101.
A blower 104 is installed in each of the air supply line 102 and the air return line 103.
The hollow cavity 101 is sequentially provided with a first heat exchanger 1, a throttle valve 3 and a second heat exchanger 2 from front to back.
A three-way control valve 4 is connected between the throttle valve 3 and the second heat exchanger 2.
The outdoor unit 200 includes a compressor 6 and a third heat exchanger 7 connected in parallel to the second heat exchanger 2.
The compressor 6, the second heat exchanger 2, the throttle valve 3, the three-way control valve 4 and the first heat exchanger 1 are connected in series in sequence.
The third heat exchanger 7 is connected between the compressor 6 and the three-way control valve 4.
The utility model provides an air treatment unit can be used for dehumidifying and rising temperature to the air.
The air handling unit includes an indoor unit 100 and an outdoor unit 200. The indoor unit 100 has a hollow chamber 101 therein, and the first heat exchanger 1, the throttle valve 3 and the second heat exchanger 2 are installed in the hollow chamber 101 in sequence from front to rear. The indoor unit 100 includes an air supply duct 102 and a return duct 103, the return duct 103 is located outside the hollow chamber 101, and the air supply duct 102 passes through the hollow chamber 101. The air intake end of the air supply duct 102 is disposed at the front side of the indoor unit casing for the outdoor air to enter the air supply duct 102. The air supply end of the air supply duct 102 is provided at the rear side of the indoor unit casing for supplying air indoors. The return air end of the return air duct 103 is provided at the rear side of the indoor unit casing for the indoor return air to enter the return air duct 103. The discharge end of the return air duct 103 is provided on the front side of the indoor unit casing for discharging the return air to the outside.
The first heat exchanger 1 and the second heat exchanger 2 are communicated with each other through a pipeline, and the throttle valve 3 is installed between the first heat exchanger 1 and the second heat exchanger 2 on the communication pipeline. The three-way control valve 4 is also arranged on a communication pipeline between the first heat exchanger 1 and the second heat exchanger 2. The three-way control valve 4 is located on the rear side of the throttle valve 3. The three-way control valve 4 can adopt an electromagnetic valve and can remotely control and adjust the opening degree of each valve port.
The outdoor unit 200 includes a compressor 6 and a third heat exchanger 7. The third heat exchanger 7 is connected in parallel with the second heat exchanger 2 for taking away heat of the compressor 6. The compressor 6, the second heat exchanger 2, the throttle valve 3, the three-way control valve 4 and the first heat exchanger 1 are sequentially connected in series to form an air conditioning system capable of refrigerating.
The third heat exchanger 7 is connected between the three-way control valve 4 and the compressor 6 through a pipeline, the flow of the refrigerant entering the third heat exchanger 7 and the second heat exchanger 2 can be adjusted and controlled through the three-way control valve 4, the temperature of the second heat exchanger 2 can be adjusted, and the exhaust air temperature can be adjusted.
When the air is dehumidified, the first heat exchanger 1 is equivalent to an evaporator, the first heat exchanger releases cold for dehumidifying the passing air, the second heat exchanger 2 and the third heat exchanger 7 are equivalent to condensers for releasing heat, the second heat exchanger 2 is used for heating the dehumidified air, and the third heat exchanger 7 is used for taking away the heat generated by the compressor 6.
When the air is dehumidified, the fan 104 is turned on, the air enters the hollow chamber 101 through the air supply pipeline 102, is dehumidified by the first heat exchanger 1, is heated by the second heat exchanger 2, and is finally delivered into the room from the air supply end of the air supply pipeline 102.
In some circumstances, the compressor 6 may be turned off, and the indoor unit 100 may circulate air to the outside and inside through the fan 104.
In one embodiment, as shown in FIG. 1, the compressor 6 also has a four-way reversing valve 8.
The throttle valve 3 is further connected with a first bypass pipe 31 at both ends thereof, and a first check valve 32 is installed on the first bypass pipe 31.
The outlet of the compressor 6 is connected to the first port 81 of the four-way selector valve 8 via a conduit 61.
The second heat exchanger 2 is connected to the second port 82 of the four-way selector valve 8 via a line 21.
The third heat exchanger 7 is connected to the second port 82 of the four-way selector valve 8 via a line 71.
The third heat exchanger 7 is connected to the three-way control valve 4 via a line 72.
A second check valve 73 is provided on a pipe 72 connecting the third heat exchanger 7 and the three-way control valve 4, a second bypass pipe 74 is connected to both ends of the second check valve 73, and a capillary tube 75 is attached to the second bypass pipe 74.
The first heat exchanger 1 is connected with a third valve port 83 of the four-way reversing valve 8 through a pipeline 11.
The inlet of the compressor 6 is connected to the fourth port 84 of the four-way reversing valve 8 via a conduit 62.
In this embodiment, the air conditioning system can realize cooling and heating. The first check valve 32 and the second check valve 73 can be electromagnetic valves, and the switches can be controlled by a remote controller.
During cooling of the air conditioning system, the second check valve 73 is opened, the first check valve 32 is closed, and freon circulates in a manner shown in fig. 3, and freon flows out of the compressor 8, enters the four-way selector valve 8 through the pipe 61 and the first valve port 81, and then flows out of the second valve port 82. One part of the freon enters the second heat exchanger 2 through the pipeline 21, the freon flowing out of the second heat exchanger 2 passes through the three-way control valve 4, the other part of the freon enters the third heat exchanger 7 through the pipeline 71, and the freon flowing out of the third heat exchanger 7 passes through the pipeline 72 and the second one-way valve 73 and flows to the three-way control valve 4. The freon collected by the three-way control valve 4 enters the first heat exchanger 1 through the throttle valve 3, and the freon flowing out of the first heat exchanger 1 enters the four-way reversing valve 8 through the pipeline 11 and the third valve port 83 and then returns to the compressor 6 through the fourth valve port 83 and the pipeline 62.
In the above process, the first heat exchanger 1 is used as an evaporator, and the first heat exchanger 1 cools down for dehumidifying the passing air. The second heat exchanger 2 and the third heat exchanger 7 are used as condensers, the second heat exchanger 2 is used for heating the dehumidified air, and the third heat exchanger 7 is used for taking away heat of the compressor 6.
When the air conditioning system heats, the second one-way valve 73 is closed, the first one-way valve 32 is opened, the three-way control valve 4 is closed at the valve port connected with the second heat exchanger 2, the circulation mode of the freon is shown in fig. 4, the freon flows out of the compressor 8, enters the four-way reversing valve 8 through the pipeline 61 and the first valve port 81, then enters the first heat exchanger 1 through the third valve port 83 and the pipeline 11, and the freon flowing out of the first heat exchanger 1 enters the three-way control valve 4 through the first bypass pipe 31. Then enters a second bypass conduit 74 via conduit 72, passes through capillary tube 75 and enters the third heat exchanger 7, and the freon exiting the third heat exchanger 7 enters the four-way reversing valve 8 via conduit 71 and second valve port 82, and then returns to the compressor 6 via fourth valve port 84 and conduit 62.
In the above process, the first heat exchanger 1 is used as a condenser for heating the passing air. The third heat exchanger 7 is used as an evaporator.
In one embodiment, as shown in fig. 1, a fourth heat exchanger 5 for exchanging heat with an external water source is further installed in the hollow chamber 101, and the fourth heat exchanger 5 is located at the front side of the first heat exchanger 1.
The external water source may be a cold source or a heat source. In summer, the external water source is underground water, and the fourth heat exchanger 5 can dehumidify passing air in advance, so that the load of the compressor 6 can be reduced. In winter, boiler water is used as an external water source, the fourth heat exchanger 5 can heat passing air in advance, and the load of the compressor 6 can be reduced.
In one embodiment, as shown in fig. 1, the input port of the fourth heat exchanger 5 is connected to a water supply pipe 51, and the output port of the fourth heat exchanger 5 is connected to a water return pipe 52.
A connection pipe 53 for adjusting the amount of water flowing into the fourth heat exchanger 5 is connected between the water supply pipe 51 and the water return pipe 52.
The size of the water flow entering the fourth heat exchanger 5 can be changed by changing the flow rate of the communicating pipe 53, so as to change the heat exchange temperature of the fourth heat exchanger 5.
In one embodiment, as shown in fig. 1, a three-way valve 54 is disposed on the water return pipe 52, one end of a communication pipe 53 is connected to the water supply pipe 51, and the other end of the communication pipe 53 is connected to one port of the three-way valve 54. The three-way valve 54 can be an electromagnetic valve, and the opening degree of the valve port can be controlled by a remote controller to change the water flow rate of the communicating pipe 53.
In one embodiment, as shown in fig. 1, a total heat exchanger core 105 is installed in the indoor unit 100.
The air supply duct 102 and the air return duct 103 cross at the front side of the hollow chamber 101, and the total heat exchanger core 105 is installed at the intersection of the air supply duct 102 and the air return duct 103.
The heat exchange between the fresh air in the air supply pipeline 102 and the return air in the return air pipeline 103 can be realized through the total heat exchanger core 105, and the heat exchange comprises temperature and humidity exchange so as to fully utilize the heat or cold of the return air.
In summer, the air temperature in the return air duct 103 is lower than the temperature of the outdoor air, and the air humidity in the return air duct 103 is lower than the humidity of the outdoor air, so that when passing through the total heat exchanger core 105, the air temperature and humidity in the supply air duct 102 can be exchanged, the air in the supply air duct 102 can be cooled and dehumidified in advance, and the load of the compressor 6 can be reduced.
In winter, the air temperature in the return air duct 103 is higher than the temperature of the outdoor air, and the air humidity in the return air duct 103 is higher than the humidity of the outdoor air, so that the air in the supply air duct 102 can be subjected to temperature exchange and humidity exchange while passing through the total heat exchanger core 105, so that the air in the supply air duct 102 can be heated and humidified in advance, and the load of the compressor 6 can be reduced.
In one embodiment, as shown in fig. 1, a bypass valve 106 is provided between the return air pipeline 103 and the hollow chamber 101 for the air flow in the return air pipeline 103 to enter the hollow chamber 101, and the bypass valve 106 is located at the rear side of the total heat exchanger core 105 and at the front side of the first heat exchanger 1.
The mixing mode and the internal circulation mode can be realized by configuring the bypass valve 106. The bypass valve 106 is a solenoid valve, and can be controlled to open and close by a remote controller.
A wind mixing mode:
when the bypass valve 106 is partially opened during dehumidification in summer, a part of return air in the return air pipeline 103 enters the hollow cavity 101, and is then dehumidified by the first heat exchanger 1 and heated by the second heat exchanger 2 and then discharged. Since the temperature of the return air is lower than that of the outdoor air and the humidity of the return air is lower than that of the outdoor air, the load of the compressor 6 can be reduced. When the bypass valve 106 is fully open, all of the return air in the return air line 103 enters the hollow chamber 101.
In winter heating, when the bypass valve 106 is partially opened, a part of return air in the return air pipeline 103 enters the hollow cavity 101, and is then heated by the first heat exchanger 1 and discharged. Because the temperature of return air is higher than the temperature of outdoor air, can reduce the load of compressor 6, because the humidity of return air is greater than the humidity of outdoor air, can play the humidification effect of certain degree to the new trend. When the bypass valve 106 is fully opened, all the return air in the return air pipeline 103 enters the hollow chamber 101.
An internal circulation mode:
the air inlet of the air supply pipeline 102 and the air outlet of the air return pipeline 103 are closed, the bypass valve 106 is fully opened, and air can circulate in the room, the air return pipeline 103, the bypass valve 106 and the air supply pipeline 102. The internal circulation mode may be used when the outdoor temperature is low.
In one embodiment, as shown in fig. 1, an air inlet end of the air supply pipeline 102, an air supply end of the air supply pipeline 102 and a return air end of the return air pipeline 103 are respectively provided with an air purification device 107. The air cleaning device 107 may select an air filter element to filter the air passing therethrough.
In one embodiment, as shown in fig. 1, the fan 104 in the supply duct 102 is located at the supply end of the supply duct 102 to facilitate the supply of fresh air into the room. The fan 104 in the return air pipeline 103 is positioned at the air exhaust end of the return air pipeline 103, so that the return air is favorably exhausted to the outside.
In one embodiment, as shown in fig. 1, the compressor 6 further includes a fan 9 for dissipating heat of the third heat exchanger 7, so as to facilitate heat dissipation of the third heat exchanger 7.
To sum up, the utility model provides an air handling unit both can be to the air humidification, can also heat the air, when to the air dehumidification, first heat exchanger release cold volume is to the air dehumidification of flowing through, and the second heat exchanger releases heat and heats the air after the dehumidification, and the third heat exchanger releases heat and is used for taking away the heat that the compressor produced, adjusts the flow that gets into the refrigerant in the second heat exchanger through the three way control valve, can adjust the temperature of second heat exchanger to realize air supply temperature's control.
According to the needs, the above technical schemes can be combined to achieve the best technical effect.
What has been described above is merely the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, on the basis of the principle of the present invention, several other modifications can be made, and the protection scope of the present invention should be considered.
Claims (10)
1. An air handling unit is characterized by comprising an indoor unit and an outdoor unit;
the indoor unit is provided with a hollow cavity, an air supply pipeline and an air return pipeline, the air return pipeline is positioned outside the hollow cavity, and the air supply pipeline passes through the hollow cavity;
fans are respectively arranged in the air supply pipeline and the air return pipeline;
a first heat exchanger, a throttle valve and a second heat exchanger are sequentially arranged in the hollow cavity from front to back;
a three-way control valve is connected between the throttle valve and the second heat exchanger;
the outdoor unit is provided with a compressor and a third heat exchanger connected with the second heat exchanger in parallel;
the compressor, the second heat exchanger, the throttle valve, the three-way control valve and the first heat exchanger are sequentially connected in series;
the third heat exchanger is connected between the compressor and the three-way control valve.
2. The air handling unit of claim 1, wherein the outdoor unit further comprises a four-way reversing valve;
two ends of the throttling valve are also connected with a first bypass pipe, and a first check valve is mounted on the first bypass pipe;
the outlet of the compressor is connected with the first valve port of the four-way reversing valve through a pipeline;
the second heat exchanger is connected with a second valve port of the four-way reversing valve through a pipeline;
the third heat exchanger is connected with a second valve port of the four-way reversing valve through a pipeline;
the third heat exchanger is connected with the three-way control valve through a pipeline;
a second one-way valve is arranged on the pipeline of the third heat exchanger connected with the three-way control valve, two ends of the second one-way valve are connected with a second bypass pipe, and a capillary tube is arranged on the second bypass pipe;
the first heat exchanger is connected with a third valve port of the four-way reversing valve through a pipeline;
the inlet of the compressor is connected with the fourth valve port of the four-way reversing valve through a pipeline.
3. The air handling unit according to claim 1, wherein a fourth heat exchanger for exchanging heat with an external water source is further installed in the hollow chamber, and the fourth heat exchanger is located at a front side of the first heat exchanger.
4. The air handling unit of claim 3, wherein an input port of the fourth heat exchanger is connected with a water supply pipe, and an output port of the fourth heat exchanger is connected with a water return pipe;
and a communicating pipe for adjusting the size of water flow entering the fourth heat exchanger is connected between the water supply pipe and the water return pipe.
5. The air handling unit according to claim 4, wherein a three-way valve is disposed on the water return pipe, one end of the communication pipe is connected to the water supply pipe, and the other end of the communication pipe is connected to a valve port of the three-way valve.
6. The air handling unit of claim 1, wherein a total heat exchanger core is installed in the indoor unit;
the air supply pipeline and the air return pipeline are crossed at the front side of the hollow cavity, and the full heat exchanger core is installed at the crossed position of the air supply pipeline and the air return pipeline.
7. The air handling unit of claim 6, wherein a bypass valve is provided between the return air duct and the hollow chamber for airflow in the return air duct into the hollow chamber, the bypass valve being located on a rear side of the total heat exchanger core and on a front side of the first heat exchanger.
8. The air handling unit as claimed in claim 1, wherein the air inlet end of the air supply pipeline, the air supply end of the air supply pipeline and the air return end of the air return pipeline are respectively provided with an air purifying device.
9. The air handling unit of claim 1, wherein the fan in the supply air line is at the supply end of the supply air line;
the fan in the return air pipeline is positioned at the air exhaust end of the return air pipeline.
10. The air handling unit of claim 1, further comprising a fan in the outdoor unit for dissipating heat from the third heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121449321.1U CN215175461U (en) | 2021-06-28 | 2021-06-28 | Air treatment unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121449321.1U CN215175461U (en) | 2021-06-28 | 2021-06-28 | Air treatment unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215175461U true CN215175461U (en) | 2021-12-14 |
Family
ID=79380179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121449321.1U Active CN215175461U (en) | 2021-06-28 | 2021-06-28 | Air treatment unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215175461U (en) |
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2021
- 2021-06-28 CN CN202121449321.1U patent/CN215175461U/en active Active
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