CN108006807B - Pipeline evacuation structure and air conditioning system comprising same - Google Patents
Pipeline evacuation structure and air conditioning system comprising same Download PDFInfo
- Publication number
- CN108006807B CN108006807B CN201711428918.6A CN201711428918A CN108006807B CN 108006807 B CN108006807 B CN 108006807B CN 201711428918 A CN201711428918 A CN 201711428918A CN 108006807 B CN108006807 B CN 108006807B
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- partition plates
- partition
- liquid
- line
- air conditioning
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 19
- 239000007788 liquid Substances 0.000 claims abstract description 71
- 239000012530 fluid Substances 0.000 claims abstract description 6
- 238000005192 partition Methods 0.000 claims description 89
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 239000012780 transparent material Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 14
- 238000007599 discharging Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- -1 and thus Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/08—Arrangements for drainage, venting or aerating
- F24D19/082—Arrangements for drainage, venting or aerating for water heating systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
Abstract
The invention discloses a pipeline emptying structure and an air conditioning system comprising the same. The pipeline evacuation structure is used for exhausting gas in a liquid pipeline and comprises a shell, a cavity for fluid circulation is formed in the shell, the cavity is divided into a first part and a second part at least partially located above the first part, the first part is communicated with the second part, and a runner capable of being communicated with the liquid pipeline is arranged in the first part. The invention provides a management emptying structure which divides the inner part of a shell into a first part for liquid circulation and a second part for gas circulation, wherein the second part is positioned above the first part and is communicated with the first part, so that gas flowing into the first part along with liquid can flow into the second part and be discharged through the second part. The effect of exhausting the gas in the liquid supply pipeline is achieved.
Description
Technical Field
The invention relates to the technical field related to air conditioning systems, in particular to a pipeline emptying structure and an air conditioning system comprising the same.
Background
In recent years, in middle and northern areas of China, a large amount of primary energy (coal) is consumed for heating each year, the global environment is continuously deteriorated, the requirements of cooling and heating in winter and summer can be met on the premise of ensuring no damage to the environment, and a household central air conditioner unit based on a coal-to-electricity project in Beijing area is generated. The variable frequency integral household central air conditioning unit is a heat pump unit integrating refrigeration and heating, generally adopts an environment-friendly refrigerant R410A, improves the low-temperature heating capacity and the high-temperature refrigerating capacity of the unit through a two-stage enthalpy-increasing compressor and a variable frequency technology, expands the running range and the outlet water temperature range of the unit, and can meet the low-temperature heating requirement of cold areas and the high-temperature air conditioning requirement in summer. Is suitable for the space of increasingly high-grade apartments, complex buildings, high-grade villas, unit office buildings, restaurants, shops, entertainment venues and the like. The frequency conversion integral household central air conditioning system mainly comprises three parts. (1) A frequency conversion integral household central air conditioner host; (2) an end device; (3) water systems, and the like.
Because the household air source heat pump heating system is used by arranging a water pipeline system carrying a heat dissipation end, the water system is emptied to be necessary for the system, whether the water system is emptied is related to the performance and the reliability of the heating system, and the air source heat pump has excessive air, so that the heat exchange of a condenser is poor, and high-pressure protection is frequently reported when the air source heat pump is severe; for the waterway system, excessive air in the system can cause misoperation of elements such as a water flow switch and the like, and the whole machine module is failed to influence use; for the heat exchange tail end, the heat dissipation of the tail end is poor due to the fact that excessive air exists in the system, and the whole machine is frequently stopped due to overheat, so that the whole machine energy consumption is affected.
Although a plurality of end radiators are provided with a plurality of exhaust valves, in the actual use process, the feedback of user experience is poor, the exhaust valve plate of the end radiator cannot be guaranteed to be at the highest point of the whole system, dirty water and air in the system are often sprayed out together in the actual exhaust operation, the exhaust process is time-consuming and labor-consuming, the exhaust effect is poor, and the complete exhaust of air cannot be guaranteed.
Disclosure of Invention
Accordingly, an object of the present invention is to provide a pipe evacuation structure capable of exhausting gas in a liquid supply pipe and a heating system including the same.
In a first aspect, a pipeline emptying structure is provided, and the pipeline emptying structure is used for discharging gas in a liquid pipeline, and comprises a shell, wherein a cavity for fluid circulation is formed in the shell, the cavity is divided into a first part and a second part which is at least partially positioned above the first part, the first part is communicated with the second part, and a runner capable of being communicated with the liquid pipeline is arranged in the first part.
Preferably, a first partition plate is arranged between the first part and the second part, a vent hole is arranged on the first partition plate, and the first part and the second part are communicated through the vent hole.
Preferably, the vent hole is provided with a plurality of vent holes; and/or the number of the groups of groups,
the cross-sectional area of the vent hole is 0.15-0.3 square millimeters.
Preferably, the second portion comprises a vent for gas and/or an overflow for liquid.
Preferably, the second portion further comprises a baffle disposed between the exhaust port and the overflow port.
Preferably, the flow channel is a circuitous channel.
Preferably, a plurality of second partition plates and/or a plurality of fourth partition plates are arranged in the first part, and a plurality of second partition plates and/or a plurality of fourth partition plates are arranged side by side and form the circuitous channel in the first part.
Preferably, the housing includes a side wall plate, one of the adjacent two second partition plates is connected to the side wall plate with a gap therebetween,
and the other is connected with the first partition board and is provided with a gap with the side wall board.
Preferably, the first part is further provided with a third partition board, the third partition board is arranged opposite to the second partition board, the fourth partition board is arranged between the first partition board and the third partition board, one of two adjacent fourth partition boards is connected with the third partition board and has a gap with the first partition board, and the other one is connected with the first partition board and has a gap with the third partition board.
Preferably, the second part comprises a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are positioned at two ends of the flow channel.
Preferably, at least a portion of the housing corresponding to the first portion is a transparent material.
Preferably, a mounting structure for mounting the pipeline evacuation structure is provided on the housing.
In a second aspect, there is provided an air conditioning system comprising a water supply line to which a line drain structure as described above is connected, the line drain structure being connected in parallel to the water supply line.
Preferably, the pipe evacuation structure is disposed vertically higher than the water supply pipe.
Preferably, a switching device is provided on the connection line between the water supply line and the line drain structure.
The invention provides a management emptying structure which divides the inner part of a shell into a first part for liquid circulation and a second part for gas circulation, wherein the second part is positioned above the first part and is communicated with the first part, so that gas flowing into the first part along with liquid can flow into the second part and be discharged through the second part. The effect of exhausting the gas in the liquid supply pipeline is achieved.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 shows a schematic structural diagram of a pipe evacuation structure provided by the present invention;
FIG. 2 shows a schematic side view of a pipe evacuation structure;
fig. 3 shows a schematic diagram of an air conditioning system.
Detailed Description
The present invention is described below based on examples, but the present invention is not limited to only these examples. It will be appreciated by those of ordinary skill in the art that the drawings provided herein are for illustrative purposes and that the drawings are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description, the words "comprise," "comprising," and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The pipeline emptying structure provided by the invention is used for discharging the gas in the pipeline on the liquid supply pipeline, for example, the pipeline emptying structure can be arranged on a waterway of a heating system and used for discharging the gas in the heating waterway so as to ensure that the water pressure is not too high and ensure the efficient operation of the heating system.
In a specific embodiment, as shown in fig. 1, the pipe evacuation structure 1 provided by the present invention includes a housing, in which a cavity is formed for fluid, preferably, a liquid and a gas. The housing comprises a box body 10 and a cover body 20, wherein a cavity for fluid communication is formed between the box body 10 and the cover body 20 after the box body 10 and the cover body 20 are assembled.
The case 10 includes a bottom plate and side panels provided at edges of the bottom plate along the entire circumference of the bottom plate. The box body 10 is internally provided with a first partition plate 130, the first partition plate 130 is a strip-shaped plate, two ends of the first partition plate 130 are connected with side walls of the box body 10, and one side edge of the first partition plate 130 is connected with a bottom plate of the box body 10. The first partition 130 divides the inner cavity of the case 10 into a first portion 110 and a second portion 120, the first portion 110 and the second portion 120 are in communication to allow gas to flow from the first portion 110 into the second portion 120, and the second portion 120 is located above the first portion 110 in use. The first partition 130 is provided with a vent hole for allowing gas to flow therethrough, so that gas can flow from the first portion 110 into the second portion 120. Preferably, the cross-sectional area of the vent is 0.15-0.3mm, preferably 0.2 square millimeters. Or the diameter of the vent hole is 0.3-0.7 mm, preferably 0.5 mm.
The first portion 110 is formed with a flow channel, a liquid inlet 111 and a liquid outlet 112, the liquid inlet 111 and the liquid outlet 112 are communicated with the flow channel, the flow channel is used for allowing liquid to circulate in the first portion 110, the liquid flows in from the liquid inlet 111, passes through the flow channel and flows out from the liquid outlet 112.
Preferably, the flow channel is a circuitous channel, so as to extend the flow path of the fluid, and thus, the gas in the liquid enters the second portion 120 as much as possible, in a specific embodiment, the first portion 110 is provided with a plurality of second separators 113, and the second separators 113 are preferably in a strip-shaped plate structure, and a plurality of second separators 113 are arranged side by side and at a certain distance, preferably, in a use state, a plurality of second separators 113 are in a vertical state. One side of the second partition 113 is connected to the bottom plate, one end of the second partition 113 is connected to the side wall plate or the first partition 130, a gap is left between the second end of the second partition 113 and the first partition 130 or the side wall plate for liquid circulation, one of two adjacent second partitions 113 is connected to the side wall plate, and the other one is connected to the first partition 130, so that the flow passage extends in a serpentine shape to form a circuitous channel. A portion of the gas may be present in the liquid entering the flow channel through the liquid inlet 111, and during the flow of the liquid in the flow channel, the gas may flow into the second portion 120 through the vent hole on the first partition 130 when flowing through the second partition 113, so that the liquid flowing out through the liquid outlet 112 does not contain the gas. In order to ensure that the gas smoothly flows into the second portion 120, a plurality of vent holes are provided in the first separator 130, and the plurality of vent holes cover all areas of the first separator 130 that are not connected to the second separator 113.
Preferably, a third partition 114 is further disposed in the first portion 110, and the third partition 114 is disposed at a middle portion of the arrangement direction of the plurality of second partitions 113 and connected to a part of the second partitions 113. In the use state, the third partition 114 is located above the liquid inlet 111 and the liquid outlet 112, so that a height difference exists between the third partition 114 and the liquid inlet 111 and the liquid outlet 112. Two ends of the third partition board 114 are respectively connected with the two second partition boards 113, one side edge of the third partition board 114 is connected with the bottom board of the box body 10, a fourth partition board 115 is arranged between the third partition board 114 and the first partition board 130, the fourth partition board 115 is arranged side by side with the second partition board 113, part of the end parts of the fourth partition board 115 are connected with the third partition board 114, and a gap is reserved between the end parts of the fourth partition board 115 and the third partition board 114. As shown in fig. 1, an end portion of one of the fourth partitions 115 is connected to the third partition 114, and a gap is left between the end portions of two fourth partitions 115 adjacent thereto and the third partition 114, so that a part of the flow passage is formed between the third partition 114 and the first partition 130. The arrangement of the third partition 114 makes the flow channel located between the third partition 114 and the first partition 130 located above the liquid inlet 111 and the liquid outlet 112, so as to form a certain drop, and air entering the first portion 110 will be in the upper part of the flow channel, so that the liquid inlet 111 and the liquid outlet 112 are located below the liquid level of the liquid, and thus, liquid and gas can be prevented from being discharged from the liquid outlet 112 simultaneously, the emptying effect is ensured, and the emptying efficiency is further improved.
The second portion 120 includes a vent 121, the vent 121 allowing the flow of gas, preferably the vent 121 is disposed on the side panel, and in operation, the vent 121 is disposed on top of the case 10, the vent 121 includes a plurality of holes disposed on the side panel of the case 10 or the vent 121 may further include a grill structure disposed on the side panel of the case 10. Preferably, the second portion 120 further comprises an overflow port 122, the overflow port 122 being provided on the bottom plate or side wall of the box 10, the overflow port 122 being capable of draining liquid into the second portion 120 when the liquid in the first portion 110 flows into the second portion 120 due to the overpressure, the overflow port 122 being preferably provided on the bottom plate of the box 10 at a position close to the exhaust port 121. Further, a baffle 123 is further disposed in the second portion 120, the baffle 123 is disposed between the overflow port 122 and the exhaust port 121, and the baffle 123 is connected to the bottom plate of the box 10 and forms a gap with the side wall of the box 10. The baffle 123 is arranged so that the liquid entering the second portion 120 is not directly ejected from the air outlet 121 with the gas due to excessive pressure, and thus, the liquid is blocked.
Preferably, as shown in fig. 2, a mounting structure 11 is further provided on the pipe evacuation structure 1, and the mounting structure 11 is used for mounting the pipe evacuation structure 1, and preferably, the mounting structure 11 includes a hook structure provided on the box body 10.
The cover 20 is covered on the case 10, preferably, the cover 20 may have a plate structure, and the cover 20 is in sealing contact with the side wall plate of the case 10, the first separator 130, the second separator 113, the third separator 114, and the baffle 123. Preferably, the cover 20 is made of a transparent material, so that the flow of the liquid in the first portion 110 can be observed through the cover 20, and when the liquid flowing into the flow channel through the liquid inlet 111 has no bubble, it means that the liquid does not include gas. Preferably, only a portion of the cover 20 corresponding to the first portion 110 may be provided as a transparent material.
Preferably, in a preferred embodiment, the cover 20 has a housing structure corresponding to the structure of the box 10, and a plate structure corresponding to the first partition 130, the second partition 113, the third partition 114 and the baffle 123 is also disposed in the cover 20, and the cover 20 is covered on the box 10 to increase the volume of the cavity between the two, so that the cover can be used in a system with a larger flow.
The invention also provides an air conditioning system comprising a liquid line, as shown in fig. 3, the line drain structure 1 being connected into a water supply line 2 of the air conditioning system, preferably the line drain structure 1 being connected in parallel with the water supply line 2. Preferably, a switch structure, preferably a stop valve, is disposed on a pipeline connected to the pipeline evacuation structure 1, the switch structure controls whether the pipeline evacuation structure 1 is communicated with the water supply pipeline 2 through the stop valve, and opens the stop valve to enable part of water to flow through the pipeline evacuation structure 1 when the water in the water supply pipeline 2 needs to be exhausted, then the water flow condition in the pipeline evacuation structure 1 is observed, the switch structure indicates that the evacuation is completed when the water flowing into the first part 110 from the liquid inlet 111 does not contain bubbles, and the stop valve is closed.
Alternatively, the pipe evacuation structure 1 may be located at the highest position of the water supply pipe 2 in the vertical direction, and the stop valve may not be provided on the connection pipe of the pipe evacuation structure 1, so that the water in the water supply pipe 2 always flows through the pipe evacuation structure 1 partially, and it may be ensured that the water supply pipe 2 does not contain air.
Preferably, the air conditioning system comprises an air conditioning system, which can be used for cooling and heating. The air conditioning system further includes a heating system, which may include, for example, a water supply line of a heating system, or the like.
The pipeline emptying structure is internally provided with the first part and the second part, and the flow passage is arranged in the first part, so that the gas carried in the liquid can flow into the second part and be discharged by the second part in the process of circulating the liquid in the flow passage, and the aim of discharging the gas in the liquid pipeline is fulfilled. And the overflow port and the baffle are arranged in the second part, so that the liquid entering the second part can be discharged, and the situation that the liquid is sprayed along with the gas is avoided. The pipeline emptying structure provided by the invention is simple in structure and more convenient to install.
It is easy to understand by those skilled in the art that the above preferred embodiments can be freely combined and overlapped without conflict.
It will be understood that the above-described embodiments are merely illustrative and not restrictive, and that all obvious or equivalent modifications and substitutions to the details given above may be made by those skilled in the art without departing from the underlying principles of the invention, are intended to be included within the scope of the appended claims.
Claims (10)
1. A pipe evacuation structure for exhausting gas in a liquid pipe of an air conditioning system, comprising a housing, wherein a cavity for fluid circulation is formed in the housing, the cavity is divided into a first part and a second part at least partially positioned above the first part, the first part is communicated with the second part, and a flow passage capable of being communicated with the liquid pipe is arranged in the first part; the flow channel is a circuitous channel;
a first partition plate is arranged between the first part and the second part, a vent hole is arranged on the first partition plate, and the first part and the second part are communicated through the vent hole;
the second portion includes an exhaust port for exhausting gas;
the first part comprises a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are positioned at two ends of the flow channel;
a plurality of second partition plates, a plurality of fourth partition plates and a third partition plate are arranged in the first part, and a plurality of flow passages of a circuitous channel are formed in the first part, wherein the second partition plates and the fourth partition plates are arranged side by side; the third partition plates are arranged in the middle of the arrangement direction of the second partition plates and are positioned above the liquid inlet and the liquid outlet, so that the third partition plates have height differences with the liquid inlet and the liquid outlet; two ends of the third partition board are respectively connected with the two second partition boards; the fourth partition plates are arranged between the first partition plates and the third partition plates, one of the two adjacent fourth partition plates is connected with the third partition plates and has a gap with the first partition plates, and the other one of the two adjacent fourth partition plates is connected with the first partition plates and has a gap with the third partition plates, so that part of the flow channels are formed between the third partition plates and the first partition plates.
2. The line evacuation structure according to claim 1, wherein the vent hole is provided with a plurality of; and/or the number of the groups of groups,
the cross-sectional area of the vent hole is 0.15-0.3 square millimeters.
3. The line drain structure of claim 1, wherein the second portion further comprises an overflow port for draining liquid.
4. A line evacuation structure as claimed in claim 3 wherein the second portion further comprises a baffle disposed between the exhaust port and the overflow port.
5. The line drain structure according to claim 1, wherein the housing includes a side wall plate, one of the adjacent two second partition plates is connected to the side wall plate with a gap therebetween,
and the other is connected with the first partition board and is provided with a gap with the side wall board.
6. A line drain structure according to any one of claims 1 to 5, wherein at least a portion of the housing corresponding to the first portion is of transparent material.
7. A line drain structure according to any one of claims 1 to 5, wherein the housing is provided with mounting means for mounting the line drain structure.
8. An air conditioning system comprising a water supply line to which a line evacuation structure as claimed in any one of claims 1 to 7 is connected, the line evacuation structure being connected in parallel to the water supply line.
9. The air conditioning system of claim 8, wherein the duct evacuation structure is vertically disposed above the water supply duct.
10. An air conditioning system according to claim 8, characterized in that a switching device is provided on the connection line between the water supply line and the line drain structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711428918.6A CN108006807B (en) | 2017-12-26 | 2017-12-26 | Pipeline evacuation structure and air conditioning system comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711428918.6A CN108006807B (en) | 2017-12-26 | 2017-12-26 | Pipeline evacuation structure and air conditioning system comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108006807A CN108006807A (en) | 2018-05-08 |
| CN108006807B true CN108006807B (en) | 2023-10-24 |
Family
ID=62061409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711428918.6A Active CN108006807B (en) | 2017-12-26 | 2017-12-26 | Pipeline evacuation structure and air conditioning system comprising same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108006807B (en) |
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| KR200310058Y1 (en) * | 2003-01-24 | 2003-04-16 | 주식회사 롯데기공 | Air separator assembly |
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| CN200998609Y (en) * | 2007-01-23 | 2008-01-02 | 章大初 | Separator for water and vapor |
| CN103292382A (en) * | 2013-06-25 | 2013-09-11 | 长沙理工大学 | Device and method for removing air of water heating system |
| CN203816360U (en) * | 2014-04-09 | 2014-09-10 | 苏州杰威尔精密机械有限公司 | Moisture separator |
| CN106765440A (en) * | 2016-12-29 | 2017-05-31 | 张四清 | A kind of GEOTHERMAL WATER drainage arrangement |
| KR20170066956A (en) * | 2015-12-07 | 2017-06-15 | (주)한국밸콘 | Apparatus for discharging air and measuring discharged air |
| CN107477664A (en) * | 2017-07-10 | 2017-12-15 | 珠海格力电器股份有限公司 | A kind of water system empties control method and device |
| CN207990773U (en) * | 2017-12-26 | 2018-10-19 | 珠海格力电器股份有限公司 | Pipeline evacuation structure and air handling system including it |
-
2017
- 2017-12-26 CN CN201711428918.6A patent/CN108006807B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR200310058Y1 (en) * | 2003-01-24 | 2003-04-16 | 주식회사 롯데기공 | Air separator assembly |
| CN2722094Y (en) * | 2004-09-01 | 2005-08-31 | 李伟仁 | Gas separator of heat supply pipe line network |
| CN200998609Y (en) * | 2007-01-23 | 2008-01-02 | 章大初 | Separator for water and vapor |
| CN103292382A (en) * | 2013-06-25 | 2013-09-11 | 长沙理工大学 | Device and method for removing air of water heating system |
| CN203816360U (en) * | 2014-04-09 | 2014-09-10 | 苏州杰威尔精密机械有限公司 | Moisture separator |
| KR20170066956A (en) * | 2015-12-07 | 2017-06-15 | (주)한국밸콘 | Apparatus for discharging air and measuring discharged air |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN108006807A (en) | 2018-05-08 |
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