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WO2014017040A1 - Élément d'échangeur thermique et dispositif de ventilation de récupération de chaleur utilisant un tel élément - Google Patents

Élément d'échangeur thermique et dispositif de ventilation de récupération de chaleur utilisant un tel élément Download PDF

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Publication number
WO2014017040A1
WO2014017040A1 PCT/JP2013/004230 JP2013004230W WO2014017040A1 WO 2014017040 A1 WO2014017040 A1 WO 2014017040A1 JP 2013004230 W JP2013004230 W JP 2013004230W WO 2014017040 A1 WO2014017040 A1 WO 2014017040A1
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WIPO (PCT)
Prior art keywords
air
exhaust
supply
heat exchange
air passage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/004230
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English (en)
Japanese (ja)
Inventor
泰世 杉本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Panasonic Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Panasonic Corp filed Critical Panasonic Corp
Publication of WO2014017040A1 publication Critical patent/WO2014017040A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
    • F24F12/001—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air
    • F24F12/006—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using an air-to-air heat exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/22—Means for preventing condensation or evacuating condensate
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/56—Heat recovery units

Definitions

  • the present invention relates to a heat exchange element and a heat exchange type ventilation device using the heat exchange element.
  • the heat exchange type ventilator exchanges heat between an exhaust flow for exhausting indoor air to the outside and a supply air flow for supplying outdoor air to the room.
  • Heat exchange type ventilation equipment used in cold districts, etc. in the flow path in the heat exchanger in which warm exhaust flow from the room flows when the outdoor temperature becomes low such as ⁇ 10 ° C. or lower in winter.
  • a cold airflow from the outside flows in the flow path of the adjacent air supply, and after dew condensation, it forms ice and clogs. In the conventional heat exchange type ventilator, this clogging was prevented by stopping the operation (for example, see Patent Document 1).
  • FIG. 7 is a conceptual diagram showing a configuration of a conventional heat exchange type ventilation device.
  • the heat exchanger unit 101 performs heat exchange and ventilation between indoor air and outdoor air.
  • the heat exchanger unit 101 includes a heat exchanger 102, an exhaust path 103, an air supply path 104, an exhaust fan 105, an air supply fan 106, a temperature sensor 107, and a control unit.
  • the exhaust path 103 is a path through which indoor air is exhausted to the outside via the heat exchanger 102.
  • the air supply path 104 is a path through which outdoor air is supplied indoors.
  • the exhaust fan 105 is disposed in the exhaust path 103.
  • the air supply fan 106 is disposed in the air supply path 104.
  • the temperature sensor 107 detects the outside air temperature.
  • the control unit controls the operation of the exhaust fan 105 and the supply fan 106 based on the outside air temperature detected by the temperature sensor 107.
  • the control unit performs two freeze suppression controls according to the outside air temperature in order to prevent the heat exchanger 102 from freezing.
  • These two freeze suppression controls are a first freeze suppression control and a second freeze suppression control.
  • the first freezing suppression control is an operation in which the exhaust fan 105 is always operated and the operation of the air supply fan 106 is stopped for the first 15 minutes out of 60 minutes.
  • the second freezing suppression control is freezing suppression control of the heat exchanger 102 that is stronger than the first freezing suppression control when the outside air temperature falls below ⁇ 15 ° C.
  • the second freezing suppression control is an intermittent operation in which the operation is resumed for 5 minutes after the exhaust fan 105 and the air supply fan 106 are suspended for 60 minutes.
  • the operation is stopped for a predetermined time with respect to the problem that the exhaust passage 103 is clogged. Therefore, for example, when only the supply air is stopped, the room becomes negative pressure, and the outdoor air flows from the gaps in the building. As a result, condensation occurs in the cold draft and the indoor space. In addition, when the supply air and the exhaust air are stopped, there is a problem that the necessary ventilation amount in the room cannot be secured.
  • the heat exchange element of the present invention is provided with an exhaust unit in which a plurality of exhaust air passages are formed by providing interval holding portions and a plurality of air passage ribs for holding intervals on a heat transfer plate, and an air supply in which a plurality of air supply air passages are formed. Units are stacked. Further, in the heat exchange element, the exhaust air flowing through the exhaust air passage and the air supply air flowing through the air supply air passage are orthogonally or obliquely crossed at both ends of the exhaust air passage and the air supply air passage, and a central portion between both ends. Are facing each other. Of the plurality of supply air paths, the supply air path closest to the inlet side of the exhaust flow is closed.
  • the exhaust flow of such a heat exchange element is most likely to be frosted in the exhaust air passage, and does not exchange heat in the counterflow portion in the central portion of the air passage closest to the inlet side of the supply air flow, without causing a temperature drop. Can pass through. Therefore, frost formation in the exhaust air passage is suppressed. That is, the exhaust flow is suppressed from a total temperature decrease at the outlet of the exhaust flow even though the temperature is decreased in the cross-flow portion where heat exchange with the supply air flow occurs. As a result, after condensation occurs in the heat exchange element, it does not freeze and clog.
  • the heat exchange type ventilation device using this heat exchange element is free from clogging due to icing of the heat exchange element by the method described above. Therefore, the heat exchange type ventilation device can be continuously operated, and condensation does not occur in the cold draft and the indoor space due to the intermittent operation. In addition, necessary ventilation can be secured.
  • FIG. 1 is a conceptual diagram showing a configuration of a house in which a heat exchange type ventilator according to an embodiment of the present invention is installed.
  • FIG. 2 is a conceptual diagram showing a configuration of the heat exchange type ventilator.
  • FIG. 3 is a perspective view showing a configuration of the heat exchange element.
  • FIG. 4A is a plan view of an exhaust unit constituting an exhaust air passage when the heat exchange element is disassembled.
  • FIG. 4B is a plan view of an air supply unit constituting an air supply air passage when the heat exchange element is disassembled.
  • FIG. 5A is a conceptual diagram showing a normal state of a different configuration of the heat exchange type ventilator. Drawing 5B is a key map showing the state at the time of the airway closure of the different composition of the heat exchange type ventilation equipment.
  • FIG. 6A is a plan view of a normal air supply unit that constitutes an air supply air path when different configurations of the heat exchange element are disassembled.
  • FIG. 6B is a plan view of the air supply unit that constitutes the air supply air passage when the different configurations of the heat exchange element are disassembled when the air passage is closed.
  • FIG. 7 is a conceptual diagram showing a configuration of a conventional heat exchange type ventilation device.
  • FIG. 1 is a conceptual diagram showing a configuration of a house in which a heat exchange type ventilator according to an embodiment of the present invention is installed.
  • the house 1 includes a non-residential space that performs only exhaust and a residential space that supplies and exhausts air.
  • Non-residential spaces are, for example, bathrooms, toilets, and toilets.
  • the living space is, for example, a living room and a bedroom.
  • the exhaust and supply of air in each room is performed by connecting a duct to the heat exchange type ventilation device 2.
  • the heat exchange type ventilator 2 has a built-in heat exchange element 3 for exchanging heat between the outdoor exhaust flow 4 and the outdoor air supply flow 5.
  • FIG. 2 is a conceptual diagram showing the configuration of the heat exchange type ventilator according to the embodiment of the present invention.
  • the heat exchange type ventilation device 2 includes an exhaust air blowing path 4 a, an air supply air blowing path 5 a, an exhaust air blowing part 6, an air supply air blowing part 7, and a heat exchange element 3.
  • the exhaust flow 4 flows through the exhaust air blowing path 4a.
  • the air supply air 5 flows through the air supply air passage 5a.
  • the exhaust blower 6 blows the exhaust flow 4.
  • the supply air blower 7 blows the supply airflow 5.
  • heat exchange element 3 heat exchange between the exhaust flow 4 and the supply air flow 5 is performed.
  • the exhaust air blower 6 and the heat exchange element 3 are provided in the exhaust air passage 4a (solid line arrow in FIG. 2).
  • An air supply air blowing section 7 and a heat exchange element 3 are provided in the air supply air flow path 5a (dotted arrow in FIG. 2).
  • the exhaust air blowing path 4a is from the inside air port 8 for introducing the inside air (RA) to the exhaust port 9 for exhausting (EA) to the outside.
  • the supply air passage 5a extends from an outside air port 10 for introducing outside air (OA) to an air supply port 11 for blowing out air supply (SA) into the room.
  • the exhaust air blowing unit 6 generates an exhaust flow 4 from the inside air port 8 toward the exhaust port 9 in the exhaust air blowing path 4a.
  • the supply air blower 7 generates an air supply air flow 5 from the outside air port 10 toward the air supply port 11 in the air supply air passage 5a.
  • the heat exchange element 3 is disposed at a position where the exhaust air blowing path 4 a and the supply air blowing path 5 a intersect, and performs heat exchange between the exhaust flow 4 and the supply air flow 5.
  • FIG. 3 is a perspective view showing the configuration of the heat exchange element according to the embodiment of the present invention
  • FIG. 4A is a plan view of an exhaust unit constituting the exhaust air passage when the heat exchange element is disassembled
  • FIG. 4B is the same heat exchange.
  • It is a top view of the air supply unit which comprises the air supply air path when an element is decomposed
  • the exhaust air passage 4a in the heat exchange element 3 is the exhaust air passage 14
  • the air supply air passage 5a is the air supply air passage 15
  • the inlet of the exhaust flow 4 of the heat exchange element 3 is the inner air outlet 8a, and the outlet is exhausted.
  • the inlet 9a and the inlet of the supply airflow 5 are referred to as an outside air outlet 10a, and the outlet is referred to as an inlet 11a.
  • the heat exchange element 3 shown in FIG. 3 has a plurality of alternately stacked exhaust units 12 shown in FIG. 4A and air supply units 13 shown in FIG. 4B.
  • the exhaust unit 12 and the air supply unit 13 have substantially hexagonal outer shapes.
  • spacing ribs 12 a and 12 b are provided on the outer periphery of the exhaust unit 12 other than the sides that form the inside air ports 8 a and the exhaust ports 9 a as spacing holding portions that hold the spacing.
  • the exhaust unit 12 includes six air passage ribs 12c that divide air passages that are provided substantially in parallel and at substantially equal intervals.
  • the exhaust unit 12 is provided with interval ribs 12a and 12b that maintain an interval between the heat transfer plate 16 and a plurality of air passage ribs 12c, and a plurality of exhaust air passages 14a, 14b, 14c, 14d, 14e, and 14f. 14g are formed.
  • interval ribs 13a and 13b are provided as interval holding portions for holding intervals.
  • the air supply unit 13 includes six air passage ribs 13c that divide the air passages provided substantially in parallel and at substantially equal intervals. That is, the air supply unit 13 is provided with interval ribs 13a and 13b that hold an interval with the heat transfer plate 16, and a plurality of air passage ribs 13c, and a plurality of air supply air passages 15a, 15b, 15c, 15d, and 15e, 15f and 15g are formed.
  • the heat exchange element 3 is configured such that the exhaust air passages 14 and the air supply air passages 15 are alternately arranged one by one. .
  • the number of stacks of the exhaust unit 12 and the air supply unit 13 is determined by the size of the heat exchange type ventilation device 2 on which the heat exchange element 3 is mounted and the air volume.
  • the exhaust air passage 14 is divided into seven exhaust air passages 14a to 14g by six air passage ribs 12c.
  • the supply air passage 15 is divided into seven supply air passages 15a to 15g by six air passage ribs 13c.
  • the heat transfer plate 16 performs heat exchange between the exhaust flow 4 and the supply air flow 5.
  • a metal plate such as aluminum or a resin plate is used for the heat transfer plate 16.
  • a moisture permeable film such as paper or resin is used for the heat transfer plate 16.
  • the spacing ribs 12a, 12b, 13a, 13b are made of resin or metal.
  • the spacing ribs 12a, 12b, 13a, and 13b are preferably formed by integral molding by inserting the heat transfer plate 16 into a mold and insert injection molding with resin.
  • the exhaust air flow 4 that flows through the exhaust air passage 14 and the air supply air flow 5 that flows through the air supply air passage 15 include both end portions 30 of the exhaust air passage 14 and the air supply air passage 15 (FIG. 4B). In the B part and the D part). And in the center part 31 (C section of FIG. 4B) between the both ends 30, the exhaust flow 4 and the supply airflow 5 oppose.
  • the supply air passage 15g closest to the inlet side of the exhaust flow 4 is closed.
  • both end portions 30 in the embodiment of the present invention indicate the B portion and the D portion in FIG. 4B
  • the central portion 31 indicates the C portion in FIG. 4B.
  • the exhaust air passage 14 and the supply air passage 15 in the central portion 31 are parallel and corrugated, and the corrugations are configured in opposite directions for each layer.
  • the heat exchanging element 3 shown in FIG. 3 is a plane of the exhaust unit 12 of FIG. 4A except for a portion constituting the exhaust air passage 14a of the air passage rib 12c and a portion constituting the supply air passage 15g of the air passage rib 13c.
  • the drawing and the plan view of the air supply unit 13 in FIG. 4B are line symmetric with respect to the line AA in FIG. 4A.
  • the inside air (RA) is introduced from the inside air port 8 by the operation of the exhaust air blowing unit 6 as shown in FIG.
  • the exhaust stream 4 passes through the exhaust air passage 4a.
  • the exhaust stream 4 shown in FIG. 4A passes through the exhaust air passage 14 of the heat exchange element 3, it exchanges heat with the supply air flow 5 passing through the supply air passage 15 of the heat exchange element 3 shown in FIG. Is discharged to the outdoors through the exhaust port 9 shown in FIG.
  • the supply air flow 5 introduces outside air (OA) from the outside air port 10 by the operation of the supply air blowing section 7, and passes through the supply air blowing path 5a.
  • 4B exchanges heat with the exhaust flow 4 passing through the exhaust air passage 14 of the heat exchange element 3 shown in FIG. 4A when passing through the supply air passage 15 of the heat exchange element 3, and then FIG.
  • the air is supplied into the room through the air supply port 11 shown in FIG.
  • the outdoor temperature becomes a low temperature such as ⁇ 10 ° C. or less
  • the temperature of the exhaust stream 4 flowing through the exhaust air passage 14g closest to the outside air port 10a becomes the lowest. That is, frosting starts from the vicinity of the exhaust port 9a of the exhaust air passage 14g.
  • the air supply air passage 15g is closed (shaded portion in the figure) as shown in FIG. 4B.
  • a portion constituting a general normal supply air passage 15g of the air passage rib 13c is indicated by a broken line.
  • the supply air flow 5 does not flow through the supply air passage 15g. That is, the exhaust air flow 4 flowing through the exhaust air passage 14g does not cause heat exchange with the air supply air flow 5 because the air supply air flow 5 does not flow through the central portion 31 that theoretically has high heat exchange efficiency facing the air supply air flow 5. The temperature drop of the exhaust stream 4 is suppressed.
  • the supply air passage 15g closest to the inside air port 8a of the exhaust flow 4 is closed.
  • the exhaust air flow 4 and the supply air flow 5 do not exchange heat, and frost formation in the exhaust air passage 14g is suppressed.
  • FIG. 5A is a conceptual diagram showing a normal state of a different configuration of the heat exchange type ventilator according to the embodiment of the present invention
  • FIG. 5B is a concept showing a state of the heat exchange type ventilator with a different configuration when the air passage is closed
  • FIG. FIG. 6A is a plan view of a normal air supply unit that constitutes an air supply path when different configurations of the heat exchange element of the embodiment of the present invention are disassembled
  • FIG. 6B is an exploded view of different configurations of the heat exchange element. It is a top view at the time of the air path closing of the air supply unit which comprises the air supply air path at the time.
  • the exhaust unit 12 of the heat exchange element 18 shown in FIGS. 5A and 5B has the same shape as the exhaust unit 12 shown in FIG. 4A.
  • the air supply unit 13 of the heat exchange element 18 shown in FIGS. 6A and 6B has a shape symmetrical with the exhaust unit 12, unlike the air supply unit 13 shown in FIG. 4B.
  • the heat exchange type ventilation device 17 includes a damper 19 as an air passage closing portion. Moreover, the wind speed sensor 20 as a frost formation judgment part which judges the presence or absence of frost formation, and the microcomputer 21 are provided.
  • the damper 19 is installed on the outside air port 10 side of the heat exchange element 18. As shown in FIG. 5A, the damper 19 is normally held in a state where the air path of the heat exchange element 18 is not closed.
  • the wind speed sensor 20 is installed in the exhaust air passage 4a.
  • the wind speed sensor 20 detects the wind speed of the exhaust stream 4 and the microcomputer 21 receives the measured value.
  • the frosting determination unit determines that “there is frosting”, assuming that the air volume of the exhaust flow 4 has decreased. .
  • the wind speed sensor 20 detects a wind speed, it can be judged comparatively correctly whether frosting actually occurred.
  • the temperature sensor 22 and the microcomputer 21 may be used as the frost determination unit.
  • the temperature sensor 22 is provided in the air supply air passage 5a close to the outside air port 10, and the temperature of the air supply air flow 5 close to the outside air is measured.
  • the microcomputer 21 that has received the measurement value determines that “there is frost formation”. By measuring the temperature of the supply airflow 5 close to the outside air by the temperature sensor 22, it can be predicted to some extent whether or not frosting will occur at low cost.
  • the microcomputer 21 issues an instruction to the damper 19.
  • the damper 19 closes the inlet of the supply air passage 15 g closest to the inlet side of the exhaust flow 4 in the supply air passage 15 of the heat exchange element 18, that is, held in a closed space. To do.
  • the supply air flow 5 does not flow into the supply air passage 15g. Therefore, the exhaust flow 4 and the supply air flow 5 do not exchange heat in the counterflow portion at the center of the exhaust air passage, and frost formation in the exhaust air passage is suppressed.
  • the heat exchange type ventilation device 17 can suppress frost formation in the exhaust air passage by closing the inlet of the supply air passage 15g during frost formation. Further, at normal times, the entire area of the heat transfer plate 16 is used for heat exchange, and high heat exchange efficiency can be realized. Since the heat exchange efficiency at the normal time is high, the air conditioning load due to ventilation of the house 1 is reduced.
  • the heat exchange element of the present invention and the heat exchange type ventilator using the heat exchange element are useful in cold regions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)
  • Central Air Conditioning (AREA)

Abstract

La présente invention concerne un élément d'échangeur thermique, dans lequel un échangeur thermique à plaques (16) est équipé d'entretoises (13a, 13b) et d'une pluralité de nervures de conduit d'air (13c), et dans lequel une unité d'évacuation d'air, formant une pluralité de conduits d'évacuation d'air, et d'une unité d'alimentation d'air (13), formant une pluralité de conduits d'alimentation d'air sont superposées. En outre, le flux d'évacuation d'air et le flux d'alimentation d'air (5) se croisent orthogonalement ou se croisent obliquement aux deux extrémités (30) du conduit d'évacuation d'air et du conduit d'alimentation d'air (15), et sont en face d'une partie centrale (31). Par ailleurs, le conduit d'alimentation d'air (15g), le plus proche de la face d'orifice d'entrée du flux d'air d'évacuation de la pluralité de conduits d'alimentation d'air (15), est une zone fermée.
PCT/JP2013/004230 2012-07-24 2013-07-09 Élément d'échangeur thermique et dispositif de ventilation de récupération de chaleur utilisant un tel élément Ceased WO2014017040A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2012-163384 2012-07-24
JP2012163384 2012-07-24
JP2012-276494 2012-12-19
JP2012276494A JP6127264B2 (ja) 2012-07-24 2012-12-19 熱交換素子とそれを用いた熱交換型換気機器

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WO (1) WO2014017040A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111397085A (zh) * 2020-04-01 2020-07-10 宁波奥克斯电气股份有限公司 一种检测冷凝器脏堵的方法、装置、介质及空调器

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102245078B1 (ko) * 2020-07-06 2021-04-28 김은경 지형지물의 위치정보를 확인하는 공간영상도화시스템
KR102280852B1 (ko) * 2020-07-06 2021-07-23 주식회사 뉴비전네트웍스 도화의 정밀도를 향상시키는 공간영상도화시스템
KR102280848B1 (ko) * 2020-07-06 2021-07-23 주식회사 뉴비전네트웍스 기준점별 수치지도 데이터를 변화하는 수치지도 시스템
KR102280849B1 (ko) * 2020-07-06 2021-07-23 주식회사 뉴비전네트웍스 기준점에 따라 데이터를 갱신하는 수치지도 인식시스템
JP7523603B2 (ja) 2021-02-10 2024-07-26 三菱電機株式会社 熱交換換気装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS611027U (ja) * 1984-06-11 1986-01-07 ミサワホ−ム株式会社 空調換気扇
JP2009121727A (ja) * 2007-11-13 2009-06-04 Royal Electric Co Ltd 全熱交換型換気装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS611027U (ja) * 1984-06-11 1986-01-07 ミサワホ−ム株式会社 空調換気扇
JP2009121727A (ja) * 2007-11-13 2009-06-04 Royal Electric Co Ltd 全熱交換型換気装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111397085A (zh) * 2020-04-01 2020-07-10 宁波奥克斯电气股份有限公司 一种检测冷凝器脏堵的方法、装置、介质及空调器

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