US20180372361A1 - Heat exchange type ventilation device - Google Patents

Heat exchange type ventilation device Download PDF

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Publication number
US20180372361A1
US20180372361A1 US16/062,401 US201616062401A US2018372361A1 US 20180372361 A1 US20180372361 A1 US 20180372361A1 US 201616062401 A US201616062401 A US 201616062401A US 2018372361 A1 US2018372361 A1 US 2018372361A1
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United States
Prior art keywords
air
heat exchange
supply
path
exchange element
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Abandoned
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US16/062,401
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English (en)
Inventor
Masahide FUKUMOTO
Yousuke Hamada
Motoki HATA
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 Intellectual Property Management Co Ltd
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Panasonic Intellectual Property Management Co Ltd
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Filing date
Publication date
Priority claimed from JP2015250157A external-priority patent/JP6561313B2/ja
Priority claimed from JP2015250155A external-priority patent/JP6617280B2/ja
Application filed by Panasonic Intellectual Property Management Co Ltd filed Critical Panasonic Intellectual Property Management Co Ltd
Assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. reassignment PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FUKUMOTO, Masahide, HAMADA, YOUSUKE, HATA, Motoki
Publication of US20180372361A1 publication Critical patent/US20180372361A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/46—Improving electric energy efficiency or saving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/76—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by means responsive to temperature, e.g. bimetal springs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • 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
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
    • F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
    • F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
    • 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
    • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
    • F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
    • F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • 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 type ventilation device having a heat exchange element.
  • a heat exchange type ventilation device that allows heat exchange between supplied air and discharged air is effective.
  • a heat exchange type ventilation device includes a heat exchange element that allows heat exchange between the supplied air and the discharged air.
  • a heat exchange type ventilation device is particularly demanded in a cold district where there is a large temperature difference between an inside and an outside of a room.
  • frost is generated inside a heat exchange element. This causes a problem that clogging is likely to be caused in an air discharge path. This is because the warm and humid air inside a room is cooled to be in low temperature, and the moisture in the air is frozen.
  • frosting is remarkable on an air discharge path side in a region where an inlet of an air supply path and an outlet of the air discharge path are in contact with each other via a heat exchanger plate inside the heat exchange element.
  • a heat exchange type ventilation device for a cold district introduce outside air to a heat exchange element after heating the outside air by a heater.
  • the frost is melted (hereinafter referred to as “defrosted”) by circulating warm indoor air inside the heat exchange type ventilation device.
  • heat exchange type ventilation device 101 includes supply air blowing means 102 , discharge air blowing means 103 , and heat exchange element 107 .
  • Supply air blowing means 102 supplies outdoor air to an indoor space.
  • Discharge air blowing means 103 discharges indoor air to an outdoor space.
  • Heat exchange element 107 includes a heat exchanger plate 106 for exchanging total heat. Heat exchanger plate 106 separates air supply path 104 through which a supply air flow generated by supply air blowing means 102 flows, from air discharge path 105 through which a discharge air flow generated by discharge air blowing means 103 flows.
  • Heat exchange type ventilation device 101 is provided with temperature sensor 108 that measures temperature of the outdoor air. Heat exchange type ventilation device 101 allows heat exchange by reducing cold air supply volume while maintaining warm air discharge volume, according to the measured temperature of the outdoor air. Thereby, as the temperature of the entire heat exchange element 107 rises, clogging due to frosting is suppressed in heat exchange element 107 .
  • the air discharge volume is larger than the air supply volume. Accordingly, an outlet side of the air discharge path has negative pressure compared with an inlet side of the air supply path, due to a pressure loss of an air flow flowing inside the heat exchange element. Accordingly, the heat exchanger plate separating the air discharge path from the air supply path is bent toward the air discharge path side, whereby an opening area of the air discharge path becomes smaller. This causes a problem that clogging due to frosting is likely to be caused in the air discharge path.
  • an object of the present invention is to provide a heat exchange type ventilation device capable of suppressing clogging due to frosting in an air discharge path.
  • a heat exchange type ventilation device includes a supply air blower, a discharge air blower, a heat exchange element, and a pressure regulator.
  • the supply air blower supplies outdoor air to an indoor space.
  • the discharge air blower discharges indoor air to an outdoor space.
  • the heat exchange element includes a heat exchanger plate.
  • the heat exchanger plate separates an air supply path through which a supply air flow generated by the supply air blower flows, from an air discharge path through which a discharge air flow generated by the discharge air blower flows, and allows sensible heat or total heat to be exchanged between the air supply path and the air discharge path.
  • the pressure regulator is positioned upstream of the heat exchange element in the air supply path, and regulates pressure of the supply air flow.
  • the heat exchange type ventilation device can suppress clogging due to frosting in the air discharge path.
  • FIG. 1 schematically illustrates an exemplary installation of a heat exchange type ventilation device according to an exemplary embodiment.
  • FIG. 2 is a schematic plan view illustrating a structure of the heat exchange type ventilation device according to the exemplary embodiment.
  • FIG. 3 is a perspective view of a total heat exchange element of the heat exchange type ventilation device according to the exemplary embodiment.
  • FIG. 4 is an exploded perspective view of part of the total heat exchange element of the heat exchange type ventilation device according to the exemplary embodiment.
  • FIG. 5 is a conceptual diagram illustrating an air discharge path of a typical total heat exchange element.
  • FIG. 6A is a schematic cross-sectional view illustrating a vicinity of an outlet of an air discharge path in a total heat exchange element of a conventional heat exchange type ventilation device.
  • FIG. 6B is a schematic cross-sectional view illustrating a state where frost is generated in the vicinity of the outlet of the air discharge path in the total heat exchange element of the conventional heat exchange type ventilation device.
  • FIG. 7A is a schematic cross-sectional view illustrating a vicinity of an outlet of an air discharge path in a total heat exchange element of a heat exchange type ventilation device according to the exemplary embodiment.
  • FIG. 7B is a schematic cross-sectional view illustrating a state where frost is generated in the vicinity of the outlet of the air discharge path in the total heat exchange element of the heat exchange type ventilation device according to the exemplary embodiment.
  • FIG. 8 is a schematic plan view illustrating another structure of a heat exchange type ventilation device according to the exemplary embodiment.
  • FIG. 9 is a schematic plan view illustrating another structure of a heat exchange type ventilation device according to the exemplary embodiment.
  • FIG. 10 is a schematic plan view illustrating a structure of a conventional heat exchange type ventilation device.
  • FIG. 11 schematically illustrates an exemplary installation of a heat exchange type ventilation system according to another exemplary embodiment.
  • FIG. 12 is schematic plan view illustrating a structure of a total heat exchange type ventilation device of the heat exchange type ventilation system according to the other exemplary embodiment.
  • FIG. 13 is a perspective view of the total heat exchange element of the heat exchange type ventilation system according to the other exemplary embodiment.
  • FIG. 14 is an exploded perspective view of part of the total heat exchange element of the heat exchange type ventilation system according to the other exemplary embodiment.
  • FIG. 15 a diagram illustrating an exemplary configuration of the heat exchange type ventilation system according to the other exemplary embodiment.
  • FIG. 16 a diagram illustrating another exemplary configuration of a heat exchange type ventilation system according to the other exemplary embodiment.
  • FIG. 17 a diagram illustrating another exemplary configuration of a heat exchange type ventilation system according to the other exemplary embodiment.
  • a heat exchange type ventilation device includes a supply air blower, a discharge air blower, a heat exchange element, and a pressure regulator.
  • the supply air blower supplies outdoor air to an indoor space.
  • the discharge air blower discharges indoor air to an outdoor space.
  • the heat exchange element includes a heat exchanger plate.
  • the heat exchanger plate separates an air supply path through which a supply air flow generated by the supply air blower flows, from an air discharge path through which a discharge air flow generated by the discharge air blower flows, and allows sensible heat or total heat to be exchanged between the air supply path and the air discharge path.
  • the pressure regulator is positioned upstream of the heat exchange element in the air supply path, and regulates pressure of the supply air flow.
  • the pressure regulator can regulate the pressure of the supply air flow so as to lower the pressure of the air supply path side. Accordingly, bending of the heat exchanger plate toward the air discharge path side is suppressed, and the opening area of the air discharge path is expanded. Therefore, clogging due to frosting in the air discharge path is suppressed.
  • a heat exchange type ventilation device includes a temperature detector and a controller.
  • the temperature detector detects temperature of outdoor air.
  • the controller causes the pressure regulator to regulate the pressure of the supply air flow, based on the temperature of the outdoor air detected by the temperature detector.
  • the pressure of the supply air flow is regulated by the pressure regulator such that the pressure of the air supply path side is lowered. Accordingly, bending of the heat exchanger plate toward the air discharge path side is suppressed, and the opening area of the air discharge path is expanded. Therefore, clogging due to frosting in the air discharge path is suppressed according to the temperature of the outdoor air.
  • a heat exchange type ventilation device includes a differential pressure detector and a controller.
  • the differential pressure detector detects a differential pressure between a vicinity of an inlet of an air supply path in a heat exchange element and a vicinity of an outlet of an air discharge path in the heat exchange element.
  • the controller causes a pressure regulator to regulate pressure of the supply air flow, in response to the differential pressure detected by the differential pressure detector.
  • the pressure of the supply air flow is regulated by the pressure regulator such that the pressure of the air supply path side is lowered, in response to the differential pressure detected by the differential pressure detector. Accordingly, the pressure of the inlet side of the air supply path is kept lower than the pressure of the outlet side of the air discharge path in the heat exchange element. This means that the pressure of the inlet side of the air supply path is kept lower regardless of the magnitude of a pressure loss in each air path as a whole caused by clogging in each air path due to dirt deposited on the each air path, bending of each air path, a length of each air path, and the like. Accordingly, bending of the heat exchanger plate toward the air discharge path side is suppressed, and clogging due to frosting in the air discharge path is suppressed.
  • a pressure regulator is a damper configured to adjust an opening of the damper.
  • the pressure of the supply air flow in the heat exchange element is regulated by the opening of the damper that is a simple mechanism. Therefore, it is possible to provide a heat exchange type ventilation device in which clogging due to frosting is suppressed, at a lower price.
  • a supply air blower has a control function to keep the air volume constant regardless of a pressure change in the supply air flow.
  • the heat exchange type ventilation device can realize ventilation operation with constant air volume.
  • heat exchange type ventilation device 2 is provided inside house 1 .
  • Heat exchange type ventilation device 2 discharges air inside rooms (hereinafter referred to as indoor air) to the outdoor space, as illustrated by black arrows.
  • Heat exchange type ventilation device 2 also supplies air outside rooms (hereinafter referred to as outdoor air) to the indoor space, as illustrated by white arrows.
  • heat exchange type ventilation device 2 performs ventilation. At the time of ventilation, heat exchange type ventilation device 2 transmits heat of indoor air to be discharged to the outdoor space, to outdoor air to be supplied to the indoor space. Thereby, heat exchange type ventilation device 2 suppresses unnecessary heat discharge.
  • heat exchange type ventilation device 2 includes a body case 3 having inner air port 6 , air discharge port 7 , outer air port 9 , and air supply port 10 .
  • Heat exchange type ventilation device 2 also includes, inside body case 3 , total heat exchange element 4 serving as a heat exchange element, air discharge fan 5 serving as a discharge air blower, and air supply fan 8 serving as a supply air blower.
  • Heat exchange type ventilation device 2 drives air discharge fan 5 to suck indoor air from inner air port 6 . Then, heat exchange type ventilation device 2 discharges the sucked indoor air from air discharge port 7 to the outdoor space via total heat exchange element 4 and air discharge fan 5 . This means that air discharge fan 5 discharges indoor air to the outdoor space.
  • Discharge air flow 14 generated by air discharge fan 5 flows through air discharge path 20 that allows inner air port 6 and air discharge port 7 to communicate with each other.
  • Heat exchange type ventilation device 2 also drives air supply fan 8 to suck outdoor air from outer air port 9 . Then, heat exchange type ventilation device 2 supplies the sucked outdoor air to the indoor space from air supply port 10 via total heat exchange element 4 and air supply fan 8 . This means that air supply fan 8 supplies outdoor air to the indoor space. Supply air flow 15 generated by air supply fan 8 flows through air supply path 21 that allows outer air port 9 and air supply port 10 to communicate with each other.
  • Total heat exchange element 4 includes a plurality of layered molded items 13 , as illustrated in FIGS. 3 and 4 .
  • Each of molded items 13 is a member formed by attaching heat exchanger plate 12 to space holding ribs 11 . This means that a plurality of molded items 13 are layered with spaces held by space holding ribs 11 .
  • Discharge air flow 14 and supply air flow 15 flow through alternately every other layer with the space held by space holding ribs 11 .
  • heat exchanger plate 12 separates air supply path 21 from air discharge path 20 .
  • As discharge air flow 14 and supply air flow 15 flow through while sandwiching molded item 13 to which heat exchanger plates 12 are attached heat exchange and moisture exchange are performed via heat exchanger plates 12 .
  • total heat exchange element 4 includes heat exchanger plate 12 . Heat exchanger plate 12 allows air supply path 21 and air discharge path 20 to exchange total heat between them.
  • FIG. 5 is a conceptual diagram illustrating air discharge path 20 of a typical total heat exchange element.
  • indoor air contains humidity due to heating and human expiration, and outdoor air is dry.
  • heat and moisture of discharge air flow 14 are transferred to supply air flow 15 via heat exchanger plates 12 .
  • temperature of discharge air flow 14 is lowered by supply air flow 15 having low temperature.
  • relative humidity of discharge air flow 14 having lowered temperature exceeds 100%, dew condensation is generated.
  • the temperature of discharge air flow 14 further drops down to a degree below zero, the dew condensation is frozen to be frost.
  • a region where frosting is likely to be caused is a region as illustrated by oblique lines in FIG. 5 .
  • frosting is likely to be caused on air discharge path 20 side of a region where an outlet side of air discharge path 20 , through which discharge air flow 14 flows, and an inlet side of air supply path 21 , through which supply air flow 15 flows, are in contact with each other via heat exchanger plate 12 . This is because discharge air flow 14 in this region first exchanges heat with low-temperature supply air flow 15 , and is cooled most.
  • FIG. 6A is a schematic cross-sectional view illustrating a vicinity of an outlet of air discharge path 20 in a total heat exchange element of a conventional heat exchange type ventilation device.
  • FIG. 6B is a schematic cross-sectional view illustrating a state where frost F is generated in the vicinity of the outlet of air discharge path 20 in the total heat exchange element of the conventional heat exchange type ventilation device.
  • FIGS. 6A and 6B are schematic cross-sectional views taken along a plane orthogonal to a flowing direction of discharge air flow 14 (see FIG. 4 ).
  • a pressure loss due to bending of each air path and a length of each air path is smaller compared with a pressure loss caused when each air flow 14 , 15 flows through each air path 20 , 21 of total heat exchange element 4 . Accordingly, the pressure of the outlet side of each air path 20 , 21 becomes lower than the pressure of the inlet side of each air path 20 , 21 due to an effect of a pressure loss caused when each air flow 14 , 15 flows through each air path 20 , 21 of total heat exchange element 4 . Therefore, the pressure of the outlet side of air discharge path 20 through which discharge air flow 14 flows becomes lower than the pressure of the inlet side of air supply path 21 through which supply air flow 15 flows.
  • heat exchanger plate 12 is bent toward air discharge path 20 side, thereby an opening area of air discharge path 20 becomes smaller. Thereby, as illustrated in FIG. 6B , when frost F is generated in air discharge path 20 , clogging is likely to be caused in air discharge path 20 of total heat exchange element 4 .
  • heat exchange type ventilation device 2 of the present invention includes damper 16 that is positioned upstream (that is, outer air port 9 side) of total heat exchange element 4 on air supply path 21 in body case 3 , and serves as a pressure regulator that regulates pressure applied to heat exchanger plate 12 .
  • damper 16 regulates pressure of supply air flow 15 .
  • damper 16 By adjusting an opening of damper 16 to decrease it, an opening area of air supply path 21 , through which supply air flow 15 flows, is reduced at damper 16 . Therefore, a pressure loss in air supply path 21 at damper 16 is increased. In this way, as damper 16 lowers the pressure of supply air flow 15 , the pressure in the vicinity of the inlet of air supply path 21 in total heat exchange element 4 is lowered.
  • FIG. 7A is a schematic cross-sectional view illustrating a vicinity of an outlet of air discharge path 20 in total heat exchange element 4 of heat exchange type ventilation device 2 .
  • FIG. 7B is a schematic cross-sectional view illustrating a state where frost F is generated in the vicinity of the outlet of air discharge path 20 in total heat exchange element 4 of heat exchange type ventilation device 2 .
  • FIGS. 7A and 7B are schematic cross-sectional views taken along a plane orthogonal to a flowing direction of discharge air flow 14 .
  • damper 16 In normal operation, the opening of damper 16 is adjusted to full open. On the other hand, when it is desirable to suppress frosting in total heat exchange element 4 , the opening of damper 16 is adjusted to be decreased.
  • heat exchange type ventilation device 2 may include temperature sensor 17 as temperature detector, and controller 18 .
  • Temperature sensor 17 detects temperature of outdoor air.
  • Controller 18 causes damper 16 to regulate the pressure in the vicinity of the inlet of air supply path 21 in total heat exchange element 4 , based on the outdoor temperature detected by temperature sensor 17 . This means that controller 18 causes damper 16 to regulate the pressure of supply air flow 15 , based on the outdoor temperature detected by temperature sensor 17 .
  • controller 18 adjusts the opening of damper 16 to decrease it only when the temperature of the outdoor air detected by temperature sensor 17 is equal to or lower than temperature at which freezing is expected to be caused inside total heat exchange element 4 .
  • controller 18 adjusts the opening of damper 16 to decrease it only when the temperature is equal to or lower than temperature at which freezing is expected to be caused inside total heat exchange element 4 . Accordingly, a frequency of controlling damper 16 is reduced, whereby exhaustion of damper 16 is suppressed.
  • heat exchange type ventilation device 2 may include differential pressure gauge 19 serving as a differential pressure detector, and controller 18 .
  • Differential pressure gauge 19 detects a differential pressure between the vicinity of the inlet of air supply path 21 in total heat exchange element 4 and the vicinity of the outlet of air discharge path 20 in total heat exchange element 4 .
  • Controller 18 may adjust the opening of damper 16 in response to the differential pressure detected by differential pressure gauge 19 . This means that controller 18 may cause damper 16 to regulate the pressure of supply air flow 15 , in response to the differential pressure detected by differential pressure gauge 19 .
  • controller 18 adjusts the opening of damper 16 to decrease it. Thereby, as described above, the pressure in the vicinity of the inlet of air supply path 21 in total heat exchange element 4 is lowered, and bending of heat exchanger plate 12 toward air discharge path 20 side is suppressed, whereby clogging due to frosting in air discharge path 20 is suppressed.
  • the pressure in the vicinity of the inlet of air supply path 21 in total heat exchange element 4 is kept lower than the pressure in the vicinity of the outlet of air discharge path 20 in total heat exchange element 4 , regardless of the magnitude of a pressure loss caused by clogging in each air path due to dirt deposited on each air path 20 , 21 , bending of each air path, a length of each air path, and the like.
  • This means that the opening area of air discharge path 20 of total heat exchange element 4 is enlarged, whereby clogging due to frosting in air discharge path 20 is suppressed.
  • the inlet of air supply path 21 in total heat exchange element 4 is an inlet on outer air port 9 side of air supply path 21 in total heat exchange element 4 .
  • the outlet of air discharge path 20 in total heat exchange element 4 is an outlet on air discharge port 7 side of air discharge path 20 in total heat exchange element 4 .
  • damper 16 configured to adjust the opening as a pressure regulator, it is possible to provide heat exchange type ventilation device 2 capable of suppressing clogging due to frosting at a low price.
  • air supply fan 8 may include a control function of making air volume constant, regardless of a change in the pressure of supply air flow 15 .
  • heat exchange type ventilation device 2 can realize ventilation operation with constant air volume without depending on the pressure of supply air flow 15 regulated by damper 16 .
  • air supply fan 8 there is a fan having a DC motor.
  • a fan having a DC motor can realize a control function of making the air volume constant, and is likely to suppress power consumption.
  • total heat exchange element 4 is a cross-flow type heat exchange element in the present exemplary embodiment, it may be a hexagonal heat exchange element (not illustrated) in which a counter-flow type and a cross-flow type are combined.
  • frosting is most likely to be caused in a region where the outlet side of air discharge path 20 and the inlet side of air supply path 21 are in contact with each other via heat exchanger plate 12 . Accordingly, by reducing the pressure in the vicinity of the inlet of air supply path 21 in the heat exchange element, the opening area of air discharge path 20 is expanded, whereby clogging due to frosting in air discharge path 20 is suppressed.
  • total heat exchange element 4 that allows heat exchange and moisture exchange is exemplary illustrated as a heat exchange element in the present exemplary embodiment, a sensible heat exchange element that allows only heat exchange may be used. This means that heat exchanger plate 12 may allow only sensible heat to be exchanged between air supply path 21 and air discharge path 20 .
  • an opening area of an air discharge path is enlarged, whereby clogging due to frosting in the air discharge path is suppressed.
  • outdoor air is drier than indoor air.
  • a heat exchange type ventilation system includes a heat exchange type ventilation device, an air supply volume regulator, a temperature detector, and an air supply volume controller.
  • the heat exchange type ventilation device includes an outer air port for sucking outdoor air, an air supply port for supplying air to the indoor space, an inner air port for sucking indoor air, an air discharge port for discharging air to the outdoor space, an air supply path allowing the outer air port and the air supply port to communicate with each other, an air discharge path allowing the inner air port and the air discharge port to communicate with each other, and a heat exchange element that allows heat exchange between the air supply path and the air discharge path.
  • the air supply volume regulator is provided on the air supply path, and regulates the air supply volume.
  • the temperature detector detects outdoor temperature.
  • the air supply volume controller controls the air supply volume regulator based on the outdoor temperature detected by the temperature detector.
  • the heat exchange type ventilation system according to the other exemplary embodiment is capable of suppressing clogging due to dew condensation and freezing in the air discharge path.
  • a heat exchange type ventilation system includes a heat exchange type ventilation device, an air supply volume regulator, a temperature detector, and an air supply volume controller.
  • the heat exchange type ventilation device includes an outer air port for sucking outdoor air, an air supply port for supplying air to the indoor space, an inner air port for sucking indoor air, an air discharge port for discharging air to the outdoor space, an air supply path allowing the outer air port and the air supply port to communicate with each other, an air discharge path allowing the inner air port and the air discharge port to communicate with each other, and a heat exchange element that allows heat exchange between the air supply path and the air discharge path.
  • the air supply volume regulator is provided on the air supply path, and regulates the air supply volume.
  • the temperature detector detects outdoor temperature.
  • the air supply volume controller controls the air supply volume regulator based on the outdoor temperature detected by the temperature detector.
  • the air supply volume controller operates the air supply volume regulator. Then, the air volume of the dry supply air flow, flowing through the air supply path, is increased. Therefore, moisture transfer from the air discharge path to the air supply path is promoted, whereby generation of dew condensation in the air discharge path is suppressed. This means that clogging due to dew condensation and freezing in the air discharge path is suppressed.
  • the temperature detector and the air supply volume controller are provided inside the air supply volume regulator.
  • the air supply volume regulator is provided between the outer air port and the heat exchange element.
  • the temperature detector can be provided with simple construction without wiring a long signal line.
  • the temperature detector is provided between the outer air port and the heat exchange element.
  • the air supply volume regulator and the air supply volume controller are provided between the heat exchange element and the air supply port.
  • the temperature detector communicates with the air supply volume controller.
  • the temperature detector is provided at a position adjacent to the heat exchange element.
  • the temperature detector can detect the outdoor temperature at a position adjacent to the total heat exchange element. Accordingly, the temperature detector can detect the temperature at which freezing is caused inside the total heat exchange element, with high accuracy.
  • FIG. 11 is a schematic diagram illustrating two-story house 201 in which heat exchange type ventilation system 200 is provided.
  • house 201 is configured of a non-residential space where only air discharge is performed, and a residential space where both air supply and air discharge are performed.
  • the non-residential space includes a toilet, a washroom, a bathroom, and the like, for example.
  • the residential space includes a bedroom, a living room, and the like, for example.
  • Heat exchange type ventilation system 200 includes total heat exchange type ventilation device 202 serving as a heat exchange type ventilation device, and air supply auxiliary fan 203 serving as an air supply volume regulator.
  • Heat exchange type ventilation system 200 is provided behind a ceiling of house 201 . In order to supply and discharge air to and from each room, total heat exchange type ventilation device 202 and air supply auxiliary fan 203 are connected with each room via a duct.
  • FIG. 12 schematically illustrates a structure of total heat exchange type ventilation device 202 of heat exchange type ventilation system 200 .
  • total heat exchange type ventilation device 202 includes air supply fan 204 , air discharge fan 205 , and total heat exchange element 206 .
  • Air supply fan 204 sucks outdoor air and supplies it to the indoor space.
  • Air discharge fan 205 sucks indoor air and discharges it to the outdoor space.
  • Total heat exchange element 206 allows heat exchange and moisture exchange between supply air flow 207 sent by air supply fan 204 and discharge air flow 208 sent by air discharge fan 205 .
  • Total heat exchange type ventilation device 202 further includes outer air port 216 for sucking outdoor air, air supply port 217 for supplying air to the indoor space, inner air port 218 for sucking indoor air, air discharge port 219 for discharging air to the outdoor space, air supply path 220 , and air discharge path 221 .
  • Air supply path 220 allows outer air port 216 and air supply port 217 to communicate with each other.
  • Supply air flow 207 flows through air supply path 220 .
  • Air discharge path 221 allows inner air port 218 and air discharge port 219 to communicate with each other.
  • Discharge air flow 208 flows through air discharge path 221 .
  • Total heat exchange element 206 will be described below with use of FIGS. 13 and 14 .
  • FIG. 13 is a perspective view of total heat exchange element 206 of total heat exchange type ventilation device 202 .
  • FIG. 14 is an exploded perspective view of part of total heat exchange element 206 .
  • total heat exchange element 206 includes a plurality of layered molded items 224 .
  • Each of molded items 224 is a member formed by attaching heat exchanger plate 223 to space holding ribs 222 . This means that a plurality of molded items 224 are layered with spaces held by space holding ribs 222 .
  • Supply air flow 207 and discharge air flow 208 flow alternately every other layer with the space held by space holding ribs 222 .
  • total heat exchange element 206 heats supply air flow 207 with use of heat of discharge air flow 208 . Accordingly, discharge air flow 208 is cooled by supply air flow 207 on the contrary. When discharge air flow 208 is cooled down to a temperature below a freezing point, the moisture in discharge air flow 208 is saturated. Then, the moisture that cannot be held any more is condensed and adheres to total heat exchange element 206 . Moreover, the condensed moisture is frozen because it is cooled down to a temperature below the freezing point. The frozen moisture blocks air discharge path 221 through which discharge air flow 208 of total heat exchange element 206 flows.
  • Moisture transfer from discharge air flow 208 to supply air flow 207 is caused when absolute humidity of discharge air flow 208 is higher than absolute humidity of supply air flow 207 .
  • Absolute humidity is indicated by moisture weight contained in 1 kg of dry air.
  • moisture transfer from discharge air flow 208 having high absolute humidity to supply air flow 207 having low absolute humidity is promoted. Accordingly, as the moisture volume of discharge air flow 208 is reduced, saturation of moisture in discharge air flow 208 is suppressed, whereby dew condensation inside total heat exchange element 206 is suppressed.
  • FIG. 15 is a diagram illustrating an exemplary configuration of heat exchange type ventilation system 200 .
  • heat exchange type ventilation system 200 includes total heat exchange type ventilation device 202 , air supply auxiliary fan 203 serving as an air supply volume regulator, connection duct 209 , temperature sensor 210 serving as a temperature detector, and outdoor air connection duct 213 .
  • Air supply auxiliary fan 203 is provided to air supply path 220 , and includes sirocco fan 211 , and control board 212 serving as an air supply volume controller. More specifically, air supply auxiliary fan 203 and control board 212 are provided between air supply port 217 and total heat exchange element 206 . Connection duct 209 is provided between total heat exchange element 206 and air supply auxiliary fan 203 . Outdoor air connection duct 213 is provided between total heat exchange element 206 and outer air port 216 . Temperature sensor 210 is provided inside outdoor air connection duct 213 , and detects outdoor temperature. This means that temperature sensor 210 is provided between outer air port 216 and total heat exchange element 206 .
  • Temperature sensor 210 is electrically connected with control board 212 via signal line 214 that is an outdoor temperature communication member, and performs communication with control board 212 .
  • Control board 212 controls operation of sirocco fan 211 based on the outdoor temperature detected by temperature sensor 210 . This means that control board 212 controls air supply auxiliary fan 203 based on the outdoor temperature detected by temperature sensor 210 .
  • temperature sensor 210 a known temperature detection means can be used.
  • a thermocouple utilizing electromotive voltage generated in a connected portion of different types of metal, a resistance temperature detector, a heat measurement method using a semiconductor, or the like may be used, for example.
  • temperature at which freezing is expected to be caused inside total heat exchange element 206 is previously set to temperature Td.
  • control board 212 transmits a signal to operate sirocco fan 211 .
  • control board 212 transmits a signal to stop sirocco fan 211 .
  • control board 212 controls operation of sirocco fan 211 . Accordingly, the air volume of supply air flow 207 flowing through air supply path 220 is increased, thereby dew condensation and freezing inside total heat exchange element 206 are suppressed.
  • FIG. 16 is a diagram illustrating another exemplary configuration of heat exchange type ventilation system 200 .
  • temperature sensor 210 and control board 212 are provided inside air supply auxiliary fan 203 .
  • Air supply auxiliary fan 203 is provided between outdoor air connection duct 213 and total heat exchange element 206 . This means that air supply auxiliary fan 203 is provided between outer air port 9 and total heat exchange element 206 .
  • temperature sensor 210 can be provided with simple construction without wiring long signal line 214 .
  • FIG. 17 is a diagram illustrating another exemplary configuration of heat exchange type ventilation system 200 .
  • the present exemplary configuration differs from the exemplary configuration illustrated in FIG. 15 in the position where temperature sensor 210 is disposed.
  • temperature sensor 210 is disposed at a position adjacent to total heat exchange element 206 .
  • temperature sensor 210 can detect outdoor temperature in the vicinity of total heat exchange element 206 . Accordingly, temperature sensor 210 can detect temperature at which freezing is caused inside total heat exchange element 206 , with high accuracy.
  • heat exchange type ventilation system 200 is provided behind the ceiling of house 201 , it may be provided under the eaves of house 201 or in a machinery room.
  • sirocco fan 211 another fan of a known type may be used.
  • a fan to be used instead of sirocco fan 211 may be selected according to expected air volume and required static pressure.
  • temperature sensor 210 While temperature sensor 210 performs communication with control board 212 via a wired connection using signal line 214 , it may perform communication via a wireless connection. In the case where temperature sensor 210 performs communication via a wireless connection, as a degree of freedom in construction of temperature sensor 210 and control board 212 is increased, it is more preferable.
  • temperature sensor 210 is provided upstream of sirocco fan 211 , it may be provided downstream of sirocco fan 211 . Even when temperature sensor 210 is provided downstream of sirocco fan 211 , temperature sensor 210 can detect outdoor temperature. However, it is more preferable that temperature sensor 210 is provided upstream of sirocco fan 211 because temperature sensor 210 is less affected by heat generated by sirocco fan 211 .
  • the heat exchange type ventilation system according to the present invention can suppress freezing of total heat exchange element. Therefore, the heat exchange type ventilation system is useful as a ventilation system.
  • the heat exchange type ventilation device according to the present invention can suppress clogging due to frosting effectively. Therefore, it is useful as a heat exchange type ventilation device having a heat exchange element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
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US16/062,401 2015-12-22 2016-12-09 Heat exchange type ventilation device Abandoned US20180372361A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2015250157A JP6561313B2 (ja) 2015-12-22 2015-12-22 熱交換素子を用いた熱交換形換気装置
JP2015-250157 2015-12-22
JP2015-250155 2015-12-22
JP2015250155A JP6617280B2 (ja) 2015-12-22 2015-12-22 熱交換形換気システム
PCT/JP2016/005095 WO2017110055A1 (fr) 2015-12-22 2016-12-09 Dispositif de ventilation de type à échange de chaleur

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11268728B2 (en) * 2018-07-11 2022-03-08 Daikin Industries, Ltd. Ventilation system
US11391480B2 (en) * 2019-12-04 2022-07-19 Johnson Controls Tyco IP Holdings LLP Systems and methods for freeze protection of a coil in an HVAC system

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2571723B (en) * 2018-03-05 2021-11-24 Ventive Ltd Ventilation system including a heat pump
CN113424007A (zh) * 2019-02-27 2021-09-21 松下知识产权经营株式会社 热交换元件以及使用了该热交换元件的热交换型换气装置
JP7352773B2 (ja) * 2019-09-17 2023-09-29 パナソニックＩｐマネジメント株式会社 除湿機能付き熱交換形換気装置
CN113513804A (zh) * 2021-07-22 2021-10-19 中山市万得福电子热控科技有限公司 空气处理设备及其控制方法、计算机可读存储介质

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060117769A1 (en) * 2004-12-07 2006-06-08 American Standard International Inc. Ventilation controller
EP2101137A1 (fr) * 2008-03-14 2009-09-16 Exhausto A/S Échangeur thermique rotatif
US7942193B2 (en) * 2007-11-21 2011-05-17 Nu-Air Ventilation Systems Inc. Heat recovery ventilator with defrost
US20150053381A1 (en) * 2012-04-20 2015-02-26 Mitsubishi Electric Corporation Heat exchange element

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6023643U (ja) * 1983-07-26 1985-02-18 ミサワホ−ム株式会社 空調換気扇
JPS6063728U (ja) * 1983-10-07 1985-05-04 ミサワホーム株式会社 換気装置
JPH0334584Y2 (fr) * 1986-03-25 1991-07-23
JPH08159530A (ja) * 1994-12-02 1996-06-21 Ebara Corp 全熱交換器
FI100132B (fi) * 1995-03-03 1997-09-30 Abb Installaatiot Oy Sovitelma ilmankäsittelykoneen yhteydessä
WO2007069349A1 (fr) * 2005-12-14 2007-06-21 Matsushita Electric Industrial Co., Ltd. Ventilateur du type echangeur de chaleur
US20110036541A1 (en) * 2008-04-16 2011-02-17 Mitsubishi Electric Corporation Heat exchange ventilator
CN103946638B (zh) * 2011-11-16 2017-05-24 松下知识产权经营株式会社 给排型换气装置
JP6035509B2 (ja) * 2012-04-16 2016-11-30 パナソニックＩｐマネジメント株式会社 熱交換形換気装置
JP6142502B2 (ja) * 2012-10-31 2017-06-07 マックス株式会社 換気装置
KR101431211B1 (ko) * 2013-08-12 2014-08-18 주식회사 클린에어나노테크 전열소자를 이용한 대향류 환기장치
JP6274869B2 (ja) * 2014-01-16 2018-02-07 三菱電機株式会社 換気装置
CN203718957U (zh) * 2014-02-21 2014-07-16 广东美的制冷设备有限公司 可双向换气的空调器

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060117769A1 (en) * 2004-12-07 2006-06-08 American Standard International Inc. Ventilation controller
US7942193B2 (en) * 2007-11-21 2011-05-17 Nu-Air Ventilation Systems Inc. Heat recovery ventilator with defrost
EP2101137A1 (fr) * 2008-03-14 2009-09-16 Exhausto A/S Échangeur thermique rotatif
US20150053381A1 (en) * 2012-04-20 2015-02-26 Mitsubishi Electric Corporation Heat exchange element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11268728B2 (en) * 2018-07-11 2022-03-08 Daikin Industries, Ltd. Ventilation system
US11703245B2 (en) 2018-07-11 2023-07-18 Daikin Industries, Ltd. Ventilation system
US11391480B2 (en) * 2019-12-04 2022-07-19 Johnson Controls Tyco IP Holdings LLP Systems and methods for freeze protection of a coil in an HVAC system

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