GB2450317A - Ventilation heat recovery device - Google Patents

Ventilation heat recovery device Download PDF

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Publication number
GB2450317A
GB2450317A GB0711677A GB0711677A GB2450317A GB 2450317 A GB2450317 A GB 2450317A GB 0711677 A GB0711677 A GB 0711677A GB 0711677 A GB0711677 A GB 0711677A GB 2450317 A GB2450317 A GB 2450317A
Authority
GB
United Kingdom
Prior art keywords
air
heat exchanging
admitting
venting
passageway
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.)
Withdrawn
Application number
GB0711677A
Other versions
GB0711677D0 (en
Inventor
Chia-Pai Lui
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.)
Individual
Original Assignee
Individual
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
Priority to US11/762,826 priority Critical patent/US20080311839A1/en
Application filed by Individual filed Critical Individual
Priority to GB0711677A priority patent/GB2450317A/en
Priority to FR0756324A priority patent/FR2918445A3/en
Publication of GB0711677D0 publication Critical patent/GB0711677D0/en
Publication of GB2450317A publication Critical patent/GB2450317A/en
Withdrawn legal-status Critical Current

Links

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
    • 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
    • F24F13/02—Ducting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0014—Recuperative heat exchangers the heat being recuperated from waste air or from vapors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0025—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes
    • F28D7/0033—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being flat tubes or arrays of tubes the conduits for one medium or the conduits for both media being bent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F28F1/04—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular
    • F28F1/045—Tubular elements of cross-section which is non-circular polygonal, e.g. rectangular with assemblies of stacked elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
    • F28F7/02—Blocks traversed by passages for heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D7/0008—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium
    • F28D7/0016—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one medium being in heat conductive contact with the conduits for the other medium the conduits for one medium or the conduits for both media being bent
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

A ventilation heat recovery device comprises a body 1 including an air admittance passageway 2 for admitting fresh air from outdoors via a fan 21, the air admittance passageway 2 being coupled (adjacent) and in heat exchange relationship with a vent passageway 3 for venting indoor air from indoors via a fan 31 and thereby conducting heat to the fresh air in the air admittance passageway 2. Passageways 2, 3 may be curved (fig 5) or arranged in multi-layers winding throughout the device (fig 6). A plurality of devices may be combined together (fig 7) to improve heat conduction. The speed of the fans 21, 31 may controlled so as to rotate at different speeds to control the amount of air flow. Filters 22, 32 adjacent the fans 21, 31 may be provided. Body 1 may include heat insulation material surrounding the passageways 2, 3 to increase heat conduction.

Description

HEAT EXCHANGING VENTILATOR
BACKGROUND OF THE INVENTION
Field of the Invention
The present invention relates to a heat exchanging ventilator, and more particularly to a heat exchanging ventilator that may exchange air. Likewise, by means of the heat conductivity of air admitting and venting passageways with each other, the indoor air temperature inputted from the air admitting passageway is approximately equivalent to room temperature, thus decreasing the consumption of energy resources.
Description of the Prior Arts
At present, in most places, such as work places or homes, are installed with air conditioning equipments, e.g. air conditioners or heaters, for controlling room temperature at a constant temperature to obtain a comfortable environment.
However, if the indoor air circulates poorly, an uncomfortness will bring about. To improve such a problem, an improved method has been developed. For example, opening window slightly to make fresh air flows in from the outdoors, yet causing a temperature difference between the indoors and outdoors and consuming energy resources.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
SUMMARY OF THE INVENTION
The primary object of the present invention is to provide a heat exchanging ventilator that may exchange air, and by means of the heat conductivity of air admitting and venting passageways with each other, the indoor air temperature inputted from an air admitting passageway is approximately equivalent to room temperature, thus decreasing the consumption of energy resources.
In accordance with one aspect of the present invention, there is provided a heat exchanging ventilator comprising a temperature isolating body including an air admitting passageway and an air venting passageway couplingly arranged therein and allowing to conduct heat with each other. The two ends of the air admitting and venting passageways are in communication with the indoors and outdoors, respectively, and the air admitting and venting passageways are provided at inlets thereof with suction fans, individually, so as to let fresh air to be sucked from the suction fan of the air admitting passageway, while the indoor air may be vented from the suction fan of the air venting passageway, thereby exchanging air. Likewise, by means of the heat conductivity of the air admitting and venting passageways with each other, the indoor air temperature inputted from the air admitting passageway is approximately equivalent to room temperature.
From above-mentioned descriptions, since the air admitting and venting passageways are couplingly arranged together, a progressive heat exchange in the temperature isolating body may be achieved so that the closer the fresh air in the air admitting passageway is near to the outlet of the indoors, the more similar temperature is equal to the set indoor temperature. For example, if an air conditioner is installed indoors, the temperature of the fresh air in the air admitting passageway thereof is lowered for being inputted into the indoors, yet if a heater is installed indoors, the temperature of the fresh air in the air admitting passageway is heated by the air venting passageway for being inputted into the indoors, thus decreasing the consumption of energy resources during air exchanging process.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. I is a plane diagram illustrating the assembly of a heat exchanging ventilator of the present invention; FIG. 2 is a sectional diagram illustrating the operational state of the heat exchanging ventilator of the present invention; FIG. 3 is a perspective diagram illustrating the assembly of the heat exchanging ventilator of the present invention; FIG. 4 is a perspective diagram illustrating the application of the heat exchanging ventilator of the present invention; FIG. 5 is a partial cross sectional diagram illustrating air admitting and venting passageways of the present invention being couplingly arranged together; FIG. 6 is a perspective partial sectional diagram illustrating another air admitting and venting passageways being designed to a multi-layer and wound type.
FIG. 7 is a sectional diagram illustrating another air admitting and venting passageways being designed to a plurality type and combined together.
FIG. 8 is a perspective diagram illustrating another air admitting and venting passageways being designed to another plurality type and combined together.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
A heat exchanging ventilator in accordance with the present invention comprises a temperature isolating body I including an air admitting passageway 2 and an air venting passageway 3 couplingly arranged therein and allowing to conduct heat with each other (as shown in FIG. 1, the air admitting and venting passageways 2, 3 are arranged in a coupling manner. Also, the temperature isolating body 1 may include passages formed therein, and by using a heat conducting plate, the air admitting passageway 2 may be separated from the air venting passageway 3).
The two ends of the air admitting and venting passageways 2 and 3 are in communication with the indoors and outdoors, respectively, and the air admitting and venting passageways 2 and 3 are provided at inlets thereof with suction fans 2 1 and 31, individually (as illustrated in FIGS. 2 and 3), so as to let fresh air to be sucked from the suction fan 21 of the air admitting passageway 2, while the indoor air is vented from the suction fan 31 of the air venting passageway 3, thereby exchanging air. Likewise, by means of the heat conductivity of the air admitting and venting passageways 2, 3 with each other, the indoor air temperature inputted from the air admitting passageway 2 is approximately equivalent to room temperature.
From above-mentioned descriptions, since the air admitting and venting passageways 2, 3 are couplingly arranged together, a progressive heat exchange in the temperature isolating body 1 may be achieved so that the closer the fresh air in the air admitting passageway 2 is near to the outlet of the indoors (as shown in FIG. 4), the more similar temperature is equal to the set indoor temperature. For example, if an air conditioner is installed indoors, the temperature of the fresh air in the air admitting passageway 2 thereof is lowered for being inputted into the indoors, yet if a heater is installed indoors, the temperature of the fresh air in the air admitting passageway 2 is heated by the air venting passageway 3 for being inputted into the indoors, thus decreasing the consumption of energy resources during air exchanging process.
Besides, if the air admitting and venting passageways 2 and 3 are couplingly arranged in a curved manner (as illustrated in FIG. 5), the path and time of heat conductivity may be enhanced so that the air admitting passageway 2 may input the air closer to the indoor temperature.
Furthermore, the above-mentioned air admitting and venting passageways 2 and 3 may be designed to a multi-layer and wound type (as illustrated in FIG. 6).
Also, the air admitting and venting passageways 2 and 3 may be designed to a plurality type and then combined together (as shown in FIGS. 7 and 8), wherein they are arranged in a cross-positioned manner, thereby improving a heat conducting effect.
The suction fans 21 and 3 1 are controlled by way of multi-step switches, respectively, such that during operation, the suction fans 21 and 31 may apply different rotating speeds to control the amount of air flowing, wherein the suction fans 21 and 31 may involve filtering structures 22 and 32 formed therein, respectively.
The suction fans 2 1 and 3 1 of the air admitting and venting passageways 2 and 3 may be attached on the same sides, for instance, they are all disposed in the indoors for diminishing damage due to exposes outside or when they are mounted outdoors, a noise problem occurring indoors may be avoidable. By virtue of the rotations of the suction fans 21 and 31, the air admission of the air admitting passageway 2 and the air exhaust of the air venting passageways 3 may be controlled.
It is because that the sucking and blowing differences may result in so as to improve the air admitting and venting effect.
The temperature insolating body I further includes heat insulating materials wrapped on the air admitting and venting passageways 2 and 3 thereof for increasing heat conducting effect.
The invention is not limited to the above embodiment but various modifications thereof may be made. It will be understood by those skilled in the art that various changes in form and detail may made without departing from the scope and spirit of the present invention.

Claims (16)

  1. WHAT IS CLAIMED 1 1. A heat exchanging ventilator comprising; a
    temperature isolating body including an air admitting passageway and an air venting passageway couplingly arranged therein and allowing to conduct heat with each other, wherein the two ends of said air admitting and venting passageways are in communication with the indoors and outdoors, respectively, and said air admitting and venting passageways are provided at inlets thereof with suction fans, individually, so as to let fresh air to be sucked from said suction fan of said air admitting passageway, while the indoor air may be vented from said Suction fan of said air venting passageway, thereby conducting heat and exchanging air.
  2. 2. The heat exchanging ventilator as claimed in claim I, wherein said air admitting and venting passageways are couplingly arranged in a curved manner.
  3. 3. The heat exchanging ventilator as claimed in claim 2, wherein said air admitting and venting passageways may be designed to a multi-layer and wound type.
  4. 4. The heat exchanging ventilator as claimed in claim 1, wherein said air admitting and venting passageways may be designed to a plurality type and then combined together.
  5. 5. The heat exchanging ventilator as claimed in claim 2, wherein said air admitting and venting passageways may be designed to a plurality type and then combined together.
  6. 6. The heat exchanging ventilator as claimed in claim 3, wherein said air admitting and venting passageways may be designed to a plurality type and then combined together.
  7. 7. The heat exchanging ventilator as claimed in claim 1, wherein said air admitting and venting passageways are arranged in a cross-positioned manner, thereby improving a heat conducting effect.
  8. 8. The heat exchanging ventilator as claimed in claim 2, wherein said air admitting and venting passageways are arranged in a cross-positioned manner, thereby improving a heat conducting effect.
  9. 9. The heat exchanging ventilator as claimed in claim 3, wherein said air admitting and venting passageways are arranged in a cross-positioned manner, thereby improving a heat conducting effect.
  10. 10. The heat exchanging ventilator as claimed in claim 1, wherein said suction fans are controlled by way of multi-step switches, respectively, such that during operation, said suction fans may apply different rotating speeds to control the amount of air flowing.
  11. 11. The heat exchanging ventilator as claimed in claim 10, wherein said suction fans may involve filtering structures formed therein, respectively.
  12. 12. The heat exchanging ventilator as claimed in claim 1, wherein said air admitting and venting passageways are arranged in a coupling manner, respectively.
  13. 13. The heat exchanging ventilator as claimed in claim 1, wherein by using a heat conducting plate, said air admitting passageway may be separated from said air venting passageway.
  14. 14. The heat exchanging ventilator as claimed in claim 1, wherein said suction fans of said air admitting and venting passageways may be attached on the same sides, therefore by virtue of the rotations of said suction fans, the air admission of said air admitting passageway and the air exhaust of said air venting passageways may be controlled.
  15. 15. The heat exchanging ventilator as claimed in claim 1, wherein said temperature insolating body further includes heat insulating materials wrapped on said air admitting and venting passageways thereof for increasing heat conducting effect.
  16. 16. A heat exchanging ventilator substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
GB0711677A 2007-06-14 2007-06-18 Ventilation heat recovery device Withdrawn GB2450317A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US11/762,826 US20080311839A1 (en) 2007-06-14 2007-06-14 Heat exchanging ventilator
GB0711677A GB2450317A (en) 2007-06-14 2007-06-18 Ventilation heat recovery device
FR0756324A FR2918445A3 (en) 2007-06-14 2007-07-06 HEAT EXCHANGER FAN.

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US11/762,826 US20080311839A1 (en) 2007-06-14 2007-06-14 Heat exchanging ventilator
GB0711677A GB2450317A (en) 2007-06-14 2007-06-18 Ventilation heat recovery device
FR0756324A FR2918445A3 (en) 2007-06-14 2007-07-06 HEAT EXCHANGER FAN.

Publications (2)

Publication Number Publication Date
GB0711677D0 GB0711677D0 (en) 2007-07-25
GB2450317A true GB2450317A (en) 2008-12-24

Family

ID=40262311

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0711677A Withdrawn GB2450317A (en) 2007-06-14 2007-06-18 Ventilation heat recovery device

Country Status (3)

Country Link
US (1) US20080311839A1 (en)
FR (1) FR2918445A3 (en)
GB (1) GB2450317A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266301A (en) * 2014-09-23 2015-01-07 济南舜景医药科技有限公司 Indoor air ventilating device
CN106123644A (en) * 2016-06-27 2016-11-16 无锡锡能锅炉有限公司 A kind of heat exchanger for gas fired-boiler

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7534854B2 (en) * 2020-02-27 2024-08-15 三菱重工業株式会社 Heat Exchange Core
CN113108250A (en) * 2021-02-26 2021-07-13 上海福思照明设计有限公司 Exterior wall decorative lamp convenient to assemble
CN113090975A (en) * 2021-02-26 2021-07-09 上海福思照明设计有限公司 High-efficient heat dissipation exterior wall ornament lamp
CN113237148B (en) * 2021-03-26 2022-02-15 深圳通利机电工程有限公司 Household fresh air energy-saving ventilation heat recovery type central air conditioner all-in-one machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2929875A1 (en) * 1979-07-24 1981-02-19 Kloos Horst Ruediger Air conditioning system fresh air preheater - is heat exchanger duct with parallel chambers and double exhaust fan at discharge end
EP0074298A1 (en) * 1981-09-07 1983-03-16 PATENTS AND RESEARCHES ESTABLISHMENT Société de droit du Liechtenstein dite: Device for renewal air in a space
US5000253A (en) * 1988-03-31 1991-03-19 Roy Komarnicki Ventilating heat recovery system
US5036906A (en) * 1986-12-17 1991-08-06 Rylewski Eugeniusz Independent unit for heat exchange between a primary fluid and a secondary fluid, particularly air for ventilation and air conditioning of a room
WO2000031473A1 (en) * 1998-11-20 2000-06-02 Haeusler Peter Device and method for heating and/or ventilating a room
GB2373849A (en) * 2001-03-26 2002-10-02 Christopher John Martin Ventilation heat exchanger

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6612365B1 (en) * 1999-09-17 2003-09-02 Matsushita Electric Industrial Co., Ltd. Heating-element accommodating-box cooling apparatus and method of controlling the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2929875A1 (en) * 1979-07-24 1981-02-19 Kloos Horst Ruediger Air conditioning system fresh air preheater - is heat exchanger duct with parallel chambers and double exhaust fan at discharge end
EP0074298A1 (en) * 1981-09-07 1983-03-16 PATENTS AND RESEARCHES ESTABLISHMENT Société de droit du Liechtenstein dite: Device for renewal air in a space
US5036906A (en) * 1986-12-17 1991-08-06 Rylewski Eugeniusz Independent unit for heat exchange between a primary fluid and a secondary fluid, particularly air for ventilation and air conditioning of a room
US5000253A (en) * 1988-03-31 1991-03-19 Roy Komarnicki Ventilating heat recovery system
WO2000031473A1 (en) * 1998-11-20 2000-06-02 Haeusler Peter Device and method for heating and/or ventilating a room
GB2373849A (en) * 2001-03-26 2002-10-02 Christopher John Martin Ventilation heat exchanger

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104266301A (en) * 2014-09-23 2015-01-07 济南舜景医药科技有限公司 Indoor air ventilating device
CN106123644A (en) * 2016-06-27 2016-11-16 无锡锡能锅炉有限公司 A kind of heat exchanger for gas fired-boiler

Also Published As

Publication number Publication date
GB0711677D0 (en) 2007-07-25
FR2918445A3 (en) 2009-01-09
US20080311839A1 (en) 2008-12-18

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