US20120152503A1 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- US20120152503A1 US20120152503A1 US13/393,868 US201013393868A US2012152503A1 US 20120152503 A1 US20120152503 A1 US 20120152503A1 US 201013393868 A US201013393868 A US 201013393868A US 2012152503 A1 US2012152503 A1 US 2012152503A1
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- United States
- Prior art keywords
- air
- exhaust
- suction port
- flow path
- supply
- 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.)
- Abandoned
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Classifications
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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
- 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
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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
- 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
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
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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
- 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
- F24F2012/007—Use of energy recovery systems in air conditioning, ventilation or screening with heat-exchange between supplied and exhausted air using a by-pass for bypassing the heat-exchanger
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- 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 exchanger for ventilating rooms.
- FIG. 10 is a side structure view illustrating placement of a conventional heat exchanger.
- FIG. 11 is a bottom structure view illustrating placement of the heat exchanger.
- apparatus body 114 includes inspection cover 101 on its lower surface and, further, includes, in its side surfaces, indoor suction port 102 , indoor exhaust port 103 , outdoor suction port 104 , and outdoor exhaust port 105 . Further, at a center portion of apparatus body 114 , air-exhaust blade 106 and air-supply blade 107 are mounted on motor 108 . Further, in apparatus body 114 , air-exhaust fan casing 109 is provided outside of air-exhaust blade 106 , and air-supply fan casing 110 is provided outside air-supply blade 107 .
- Air-supply air-flow path 112 extends from outdoor suction port 104 to indoor exhaust port 103 , through air-supply air-flow path structural plate 115 , heat exchanging devices 111 , air-supply blade 107 , and exhaust pipe 117 .
- air-exhaust air-flow path 113 extends from indoor suction port 102 to outdoor exhaust port 105 , through air-exhaust air-flow path structural plate 116 , heat exchanging devices 111 , air-exhaust blade 106 , and exhaust pipe 117 (refer to PTL 1, for example).
- Heat exchanging devices 111 perform heat exchanging between air passing through air-exhaust air-flow path 113 and air passing through air-supply air-flow path 112 . Specifically, heat exchanging devices 111 recover heat in the indoor space being subjected to air conditioning, from the air passing through air-exhaust air-flow path 113 , and, using this heat, cool (or heat) the outdoor air passing through air-supply air-flow path 112 , before this outdoor air is supplied to the inside of the room.
- the pitch of heat transfer plates stacked therein should be made smaller, and the number of the heat transfer plates in the heat exchanging devices 111 within the volume of apparatus body 114 should be increased, for attaining larger amounts of heat exchanges therein.
- a conventional heat exchanger if stacking pitch of the heat transfer plates in the heat exchanging devices is made smaller, and the number of the heat transfer plates therein is made larger, within the limited volume of the apparatus body, this will increase the ventilation resistance inside the heat exchanging devices. This will increase the resistances in the air-flow paths (the ventilation resistances) inside the apparatus body, thereby inducing the problem of insufficient amounts of ventilation.
- the present invention provides a heat exchanger including an apparatus body with a box shape which is provided, in its side surfaces, with an indoor suction port, an indoor exhaust port, an outdoor suction port, and an outdoor exhaust port; a motor on which an air-exhaust blade and an air-supply blade are mounted, at a center portion of the apparatus body; an air-exhaust fan casing provided outside the air-exhaust blade; an air-supply fan casing provided outside the air-supply blade; a plurality of heat exchanging devices which are placed on outer peripheral portions of the air-exhaust fan casing and the air-supply fan casing, each includes stacked heat transfer plates adapted to flow air streams of different temperatures along alternate ones of the heat transfer plates for exchanging heat; an air-supply air-flow path which extends from the outdoor suction port through the heat exchanging device and the air-supply blade and communicates with the indoor exhaust port; and an air-exhaust air-flow path which extends from the indoor suction port through the heat exchanging device and the air-
- FIG. 1 is a side structure view illustrating a heat exchanger according to a first exemplary embodiment of the present invention.
- FIG. 2 is a bottom structure view of the heat exchanger.
- FIG. 3A is a perspective view illustrating a stacking pitch of heat transfer plates in heat exchanging devices other than those immediately after an outdoor suction port and an indoor suction port, in the heat exchanger.
- FIG. 3B is a perspective view illustrating a stacking pitch of heat transfer plates in heat exchanging devices immediately after the outdoor suction port and the indoor suction port, in the heat exchanger.
- FIG. 3C is a perspective view illustrating a stacking pitch of heat transfer plates in heat exchanging devices which are positioned in the middle of an air-supply flow path and an air-exhaust flow path in the heat exchanger.
- FIG. 4 is a perspective view illustrating sizes of heat exchanging devices in a stacking direction therein, in the heat exchanger.
- FIG. 5 is a perspective view illustrating the structure of heat exchanging devices employing a mixture of different stacking pitches, in the heat exchanger.
- FIG. 6 is a bottom structure view illustrating placement of bypass air-flow paths in a heat exchanger according to a second exemplary embodiment of the present invention.
- FIG. 7 is a perspective view illustrating the structure of a bypass air-flow path in the heat exchanger.
- FIG. 8 is a bottom structure view illustrating placement of bypass air-flow paths in the heat exchanger.
- FIG. 9 is a bottom structure view illustrating placement of filters in bypass air-flow paths in the heat exchanger.
- FIG. 10 is a side structure view illustrating placement of a conventional heat exchanger.
- FIG. 11 is a bottom structure view illustrating placement of the heat exchanger.
- FIG. 1 is a side structure view illustrating a heat exchanger according to a first exemplary embodiment of the present invention
- FIG. 2 is a bottom structure view illustrating the heat exchanger.
- the heat exchanger includes apparatus body 5 having a box shape which is provided, in its side surfaces, with indoor suction port 1 , indoor exhaust port 2 , outdoor suction port 3 , and outdoor exhaust port 4 .
- air-exhaust blade 6 and air-supply blade 7 are mounted on motor 8 .
- Air-exhaust fan casing 9 is provided outside air-exhaust blade 6
- air-supply fan casing 10 is provided outside air-supply blade 7 .
- On the outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10 there are placed a plurality of heat exchanging devices 11 .
- heat exchanging devices 11 there are heat transfer plates 20 laminated therein, and warm air and cold air at different temperatures alternately flow therethrough, so that heat transfer plates 20 perform heat exchanges therebetween.
- air-supply air-flow path 12 extends from outdoor suction port 3 through heat exchanging devices 11 and air-supply blade 7 to indoor exhaust port 2 .
- Air-exhaust air-flow path 13 extends from indoor suction port 1 through heat exchanging devices 11 and air-exhaust blade 6 to outdoor exhaust port 4 .
- FIG. 3A is a perspective view illustrating a stacking pitch of the heat transfer plates in heat exchanging devices other than those immediately after the outdoor suction port and the indoor suction port, in the heat exchanger according to the first exemplary embodiment of the present invention.
- FIG. 3B is a perspective view illustrating a stacking pitch of the heat transfer plates in heat exchanging devices immediately after the outdoor suction port and the indoor suction port, in the heat exchanger.
- FIG. 3C is a perspective view illustrating a stacking pitch of the heat transfer plates in the heat exchanging devices which are positioned in the middle of the air-supply air-flow path and the air-exhaust air-flow path in the heat exchanger. As illustrated in FIG.
- the stacking pitch of heat transfer plates 20 in heat exchanging devices 11 other than those immediately after outdoor suction port 3 and indoor suction port 1 is defined as first stacking pitch 15 a.
- the stacking pitch of heat transfer plates 20 in heat exchanging devices 11 a immediately after outdoor suction port 3 in air-supply air-flow path 12 and in heat exchanging devices lib immediately after indoor suction port 1 in air-exhaust air-flow path 13 is defined as second stacking pitch 15 b.
- second stacking pitch 15 b is made larger than first stacking pitch 15 a .
- air-supply fan casing 10 and indoor exhaust port 2 are communicated with each other, and air-exhaust fan casing 9 and outdoor exhaust port 4 are communicated with each other, through respective exhaust pipes 14 .
- the heat exchanger having the aforementioned structure will be described, in terms of operations thereof. If motor 8 is operated, this causes air-exhaust blade 6 and air-supply blade 7 to rotate. Outdoor air is sucked through outdoor suction port 3 in air-supply air-flow path 12 , and the outdoor air flows around the bottom surface in FIG. 1 , namely to the bottom surfaces of heat exchanging devices 11 , and further flows into heat exchanging devices 11 . The outdoor air having passed through heat exchanging devices 11 is sucked into air-supply blade 7 and, thereafter, is supplied to the inside of the room through indoor exhaust port 2 .
- air inside the room is sucked through indoor suction port 1 in air-exhaust air-flow path 13 , and the air inside the room flows around the top surface in FIG. 1 , namely to the top surfaces of heat exchanging devices 11 , and further flows into heat exchanging devices 11 .
- the air having passed through heat exchanging devices 11 is sucked into air-exhaust blade 6 and, thereafter, is exhausted to the outdoor through outdoor exhaust port 4 .
- heat exchanging devices 11 perform heat exchanges between air passing through air-supply air-flow path 12 and air passing through air-exhaust air-flow path 13 .
- Heat exchanging devices immediately after outdoor suction port 3 in air-supply air-flow path 12 and immediately after indoor suction port 1 in air-exhaust air-flow path 13 are adjacent to outdoor exhaust port 4 and indoor exhaust port 2 , respectively. Therefore, the areas of the air-flow paths are minimized, thereby maximizing the ventilation resistances therein.
- second stacking pitch 15 b of the heat transfer plates in heat exchanging devices 11 a and 11 b immediately after outdoor suction port 3 in air-supply air-flow path 12 and immediately after indoor suction port 1 of air-exhaust air-flow path 13 is locally made larger. As a result thereof, the ventilation resistances immediately after outdoor suction port 3 and immediately after indoor suction port 1 can be decreased, without largely degrading the heat exchanging efficiency.
- third stacking pitch 15 c of heat transfer plates 20 in heat exchanging devices 11 c which are positioned in the middle of air-supply air-flow path 12 and, also, in the middle of air-exhaust air-flow path 13 is made smaller than first stacking pitch 15 a.
- Air inside the room and outdoor air is sucked through indoor suction port 1 and outdoor suction port 3 , respectively, and part of the sucked air flows inside heat exchanging devices 11 c including heat transfer plates 20 having third stacking pitch 15 c defined as smaller. Further, part of the sucked air is sucked into air-exhaust fan casing 9 and air-supply fan casing 10 and is discharged, through outdoor exhaust port 4 and indoor exhaust port 2 .
- heat exchanging devices 11 c are spaced apart from outdoor suction port 3 in air-supply air-flow path 12 and from indoor suction port 1 in air-exhaust air-flow path 13 and are positioned in the middle of the respective air-flow paths. Heat exchanging devices 11 c are spaced apart from the minimum-distance air-flow path portions through which larger amounts of air flow from indoor suction port 1 toward air-exhaust fan casing 9 and from outdoor suction port 3 toward air-supply fan casing 10 . Therefore, heat exchanging devices 11 c are less influenced by pressure losses induced by air flows.
- third stacking pitch 15 c of heat transfer plates 20 in heat exchanging devices 11 c is locally made smaller, the ventilation resistance in apparatus body 5 is prevented from being significantly increased. Further, these heat exchanging devices 11 c can attain larger amounts of heat exchanges than those by heat exchanging devices 11 placed immediately after outdoor suction port 3 and indoor suction port 1 , thereby increasing the heat exchanging efficiency of the entire heat exchanger.
- FIG. 4 is a perspective view illustrating sizes of heat exchanging devices in a stacking direction therein, in the heat exchanger according to the first exemplary embodiment of the present invention.
- Heat exchanging devices 11 are adapted such that their sizes in the direction of stacking pitch 15 of heat transfer plates 20 (sizes 16 in the stacking direction therein) are different from each other.
- FIG. 5 is a perspective view illustrating the structure of heat exchanging devices employing a mixture of different stacking pitches, in the heat exchanger according to the first exemplary embodiment of the present invention.
- Individual heat exchanging devices 11 placed on the outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10 may be formed to have a mixture of different stacking pitches 15 .
- FIG. 6 is a bottom structure view illustrating placement of bypass air-flow paths in a heat exchanger according to a second exemplary embodiment of the present invention.
- FIG. 7 is a perspective view illustrating the structure of the bypass air-flow paths in the heat exchanger.
- the same components as those of the first exemplary embodiment will be designated by the same reference marks and will not be described herein, in detail.
- a plurality of heat exchanging devices 11 are placed and, also, bypass air-flow paths 17 ( FIG. 7 ) are placed, on the outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10 .
- part of air passing through air-supply air-flow path 12 is directly sucked into air-supply blade 7 through bypass air-flow paths 17 and, then, is directly supplied to the inside of the room.
- part of air passing through air-exhaust air-flow path 13 is directly sucked into air-exhaust blade 6 through bypass air-flow paths 17 and, then, is directly discharged to the outdoor.
- heat exchanging devices 11 and bypass air-flow paths 17 are placed such that they are mixed therein.
- By adjusting the positions at which bypass air-flow paths 17 are placed it is possible to adjust the heat exchanging efficiency of the heat exchanger and the ventilation resistance inside apparatus body 5 .
- FIG. 8 is a bottom structure view illustrating placement of bypass air-flow paths in the heat exchanger according to the second exemplary embodiment of the present invention.
- bypass air-flow paths 17 illustrated in FIG. 8 are placed on the entire outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10 .
- FIG. 9 is a bottom structure view illustrating placement of filters in bypass air-flow paths in the heat exchanger according to the second exemplary embodiment of the present invention.
- bypass air-flow paths 17 provided with filters 18 inside thereof are placed on the outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10 .
- filters 18 mounted in bypass air-flow paths 17 it is possible to employ dust filters and deodorization filters.
- filters 18 mounted in bypass air-flow paths 17 it is possible to employ acoustical materials, which can reduce ventilation noises inside apparatus body 5 .
- the present invention can be applied to applications of blowing apparatuses and the like which include heat exchangers required to have reduced ventilation resistances in the apparatus bodies in such a way as to maintain the sizes of the apparatus bodies.
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
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Abstract
Description
- The present invention relates to a heat exchanger for ventilating rooms.
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FIG. 10 is a side structure view illustrating placement of a conventional heat exchanger.FIG. 11 is a bottom structure view illustrating placement of the heat exchanger. - As illustrated in
FIGS. 10 and 11 ,apparatus body 114 includesinspection cover 101 on its lower surface and, further, includes, in its side surfaces,indoor suction port 102,indoor exhaust port 103,outdoor suction port 104, andoutdoor exhaust port 105. Further, at a center portion ofapparatus body 114, air-exhaust blade 106 and air-supply blade 107 are mounted onmotor 108. Further, inapparatus body 114, air-exhaust fan casing 109 is provided outside of air-exhaust blade 106, and air-supply fan casing 110 is provided outside air-supply blade 107. - On the outer peripheral portions of air-
exhaust fan casing 109 and air-supply fan casing 110, there are placedheat exchanging devices 111. Air-supply air-flow path 112 extends fromoutdoor suction port 104 toindoor exhaust port 103, through air-supply air-flow pathstructural plate 115,heat exchanging devices 111, air-supply blade 107, andexhaust pipe 117. On the other hand, air-exhaust air-flow path 113 extends fromindoor suction port 102 tooutdoor exhaust port 105, through air-exhaust air-flow pathstructural plate 116,heat exchanging devices 111, air-exhaust blade 106, and exhaust pipe 117 (refer toPTL 1, for example). -
Heat exchanging devices 111 perform heat exchanging between air passing through air-exhaust air-flow path 113 and air passing through air-supply air-flow path 112. Specifically,heat exchanging devices 111 recover heat in the indoor space being subjected to air conditioning, from the air passing through air-exhaust air-flow path 113, and, using this heat, cool (or heat) the outdoor air passing through air-supply air-flow path 112, before this outdoor air is supplied to the inside of the room. - In order to increase the heat exchanging efficiency in
heat exchanging devices 111, within the limited volume ofapparatus body 114, the pitch of heat transfer plates stacked therein should be made smaller, and the number of the heat transfer plates in theheat exchanging devices 111 within the volume ofapparatus body 114 should be increased, for attaining larger amounts of heat exchanges therein. With such a conventional heat exchanger, if stacking pitch of the heat transfer plates in the heat exchanging devices is made smaller, and the number of the heat transfer plates therein is made larger, within the limited volume of the apparatus body, this will increase the ventilation resistance inside the heat exchanging devices. This will increase the resistances in the air-flow paths (the ventilation resistances) inside the apparatus body, thereby inducing the problem of insufficient amounts of ventilation. - Patent Literature
- PTL 1: Unexamined Japanese Patent Publication No. 2006-349223
- The present invention provides a heat exchanger including an apparatus body with a box shape which is provided, in its side surfaces, with an indoor suction port, an indoor exhaust port, an outdoor suction port, and an outdoor exhaust port; a motor on which an air-exhaust blade and an air-supply blade are mounted, at a center portion of the apparatus body; an air-exhaust fan casing provided outside the air-exhaust blade; an air-supply fan casing provided outside the air-supply blade; a plurality of heat exchanging devices which are placed on outer peripheral portions of the air-exhaust fan casing and the air-supply fan casing, each includes stacked heat transfer plates adapted to flow air streams of different temperatures along alternate ones of the heat transfer plates for exchanging heat; an air-supply air-flow path which extends from the outdoor suction port through the heat exchanging device and the air-supply blade and communicates with the indoor exhaust port; and an air-exhaust air-flow path which extends from the indoor suction port through the heat exchanging device and the air-exhaust blade and communicates with the outdoor exhaust port, wherein a first stacking pitch of the heat transfer plates in the heat exchanging devices placed at positions other than that immediately after the outdoor suction port in the air-supply air-flow path and at positions other than that immediately after the indoor suction port in the air-exhaust air-flow path is smaller than a second stacking pitch of the heat transfer plates in the heat exchanging devices immediately after the outdoor suction port in the air-supply air-flow path and immediately after the indoor suction port in the air-exhaust air-flow path.
- As a result thereof, air inside the room and outdoor air are sucked through the indoor suction port and the outdoor suction port, respectively, and part of the sucked air flows through the insides of the heat exchanging devices including the heat transfer plates having the larger stacking pitch. Further, this air is sucked into the air-exhaust fan casing and the air-supply fan casing and, then, is discharged through the outdoor exhaust port and the indoor exhaust port. This prevents the ventilation resistance from being increased and, further, prevents the amount of ventilation from being insufficient.
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FIG. 1 is a side structure view illustrating a heat exchanger according to a first exemplary embodiment of the present invention. -
FIG. 2 is a bottom structure view of the heat exchanger. -
FIG. 3A is a perspective view illustrating a stacking pitch of heat transfer plates in heat exchanging devices other than those immediately after an outdoor suction port and an indoor suction port, in the heat exchanger. -
FIG. 3B is a perspective view illustrating a stacking pitch of heat transfer plates in heat exchanging devices immediately after the outdoor suction port and the indoor suction port, in the heat exchanger. -
FIG. 3C is a perspective view illustrating a stacking pitch of heat transfer plates in heat exchanging devices which are positioned in the middle of an air-supply flow path and an air-exhaust flow path in the heat exchanger. -
FIG. 4 is a perspective view illustrating sizes of heat exchanging devices in a stacking direction therein, in the heat exchanger. -
FIG. 5 is a perspective view illustrating the structure of heat exchanging devices employing a mixture of different stacking pitches, in the heat exchanger. -
FIG. 6 is a bottom structure view illustrating placement of bypass air-flow paths in a heat exchanger according to a second exemplary embodiment of the present invention. -
FIG. 7 is a perspective view illustrating the structure of a bypass air-flow path in the heat exchanger. -
FIG. 8 is a bottom structure view illustrating placement of bypass air-flow paths in the heat exchanger. -
FIG. 9 is a bottom structure view illustrating placement of filters in bypass air-flow paths in the heat exchanger. -
FIG. 10 is a side structure view illustrating placement of a conventional heat exchanger. -
FIG. 11 is a bottom structure view illustrating placement of the heat exchanger. - Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.
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FIG. 1 is a side structure view illustrating a heat exchanger according to a first exemplary embodiment of the present invention, andFIG. 2 is a bottom structure view illustrating the heat exchanger. The heat exchanger includesapparatus body 5 having a box shape which is provided, in its side surfaces, withindoor suction port 1,indoor exhaust port 2,outdoor suction port 3, andoutdoor exhaust port 4. At a center portion ofapparatus body 5, air-exhaust blade 6 and air-supply blade 7 are mounted onmotor 8. Air-exhaust fan casing 9 is provided outside air-exhaust blade 6, and air-supply fan casing 10 is provided outside air-supply blade 7. On the outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10, there are placed a plurality ofheat exchanging devices 11. - In
heat exchanging devices 11, there areheat transfer plates 20 laminated therein, and warm air and cold air at different temperatures alternately flow therethrough, so thatheat transfer plates 20 perform heat exchanges therebetween. Further, insideapparatus body 5, there are formed air-supply air-flow path 12 and air-exhaust air-flow path 13. In this case, air-supply air-flow path 12 extends fromoutdoor suction port 3 throughheat exchanging devices 11 and air-supply blade 7 toindoor exhaust port 2. Air-exhaust air-flow path 13 extends fromindoor suction port 1 throughheat exchanging devices 11 and air-exhaust blade 6 tooutdoor exhaust port 4. -
FIG. 3A is a perspective view illustrating a stacking pitch of the heat transfer plates in heat exchanging devices other than those immediately after the outdoor suction port and the indoor suction port, in the heat exchanger according to the first exemplary embodiment of the present invention.FIG. 3B is a perspective view illustrating a stacking pitch of the heat transfer plates in heat exchanging devices immediately after the outdoor suction port and the indoor suction port, in the heat exchanger.FIG. 3C is a perspective view illustrating a stacking pitch of the heat transfer plates in the heat exchanging devices which are positioned in the middle of the air-supply air-flow path and the air-exhaust air-flow path in the heat exchanger. As illustrated inFIG. 3A , the stacking pitch ofheat transfer plates 20 inheat exchanging devices 11 other than those immediately afteroutdoor suction port 3 andindoor suction port 1 is defined asfirst stacking pitch 15 a. Further, as illustrated inFIG. 3B , the stacking pitch ofheat transfer plates 20 inheat exchanging devices 11 a immediately afteroutdoor suction port 3 in air-supply air-flow path 12 and in heat exchanging devices lib immediately afterindoor suction port 1 in air-exhaust air-flow path 13 is defined assecond stacking pitch 15 b. In this case,second stacking pitch 15 b is made larger thanfirst stacking pitch 15 a. Further, air-supply fan casing 10 andindoor exhaust port 2 are communicated with each other, and air-exhaust fan casing 9 andoutdoor exhaust port 4 are communicated with each other, throughrespective exhaust pipes 14. - The heat exchanger having the aforementioned structure will be described, in terms of operations thereof. If
motor 8 is operated, this causes air-exhaust blade 6 and air-supply blade 7 to rotate. Outdoor air is sucked throughoutdoor suction port 3 in air-supply air-flow path 12, and the outdoor air flows around the bottom surface inFIG. 1 , namely to the bottom surfaces ofheat exchanging devices 11, and further flows intoheat exchanging devices 11. The outdoor air having passed throughheat exchanging devices 11 is sucked into air-supply blade 7 and, thereafter, is supplied to the inside of the room throughindoor exhaust port 2. - On the other hand, air inside the room is sucked through
indoor suction port 1 in air-exhaust air-flow path 13, and the air inside the room flows around the top surface inFIG. 1 , namely to the top surfaces ofheat exchanging devices 11, and further flows intoheat exchanging devices 11. The air having passed throughheat exchanging devices 11 is sucked into air-exhaust blade 6 and, thereafter, is exhausted to the outdoor throughoutdoor exhaust port 4. At this time,heat exchanging devices 11 perform heat exchanges between air passing through air-supply air-flow path 12 and air passing through air-exhaust air-flow path 13. - In this case, air inside the room and outdoor air are sucked, through
indoor suction port 1 andoutdoor suction port 3, respectively. Part of the sucked air flow insideheat exchanging devices 11 a and lib includingheat transfer plates 20 having second stackingpitch 15 b defined as larger. Further, part of the sucked air is sucked into air-exhaust fan casing 9 and air-supply fan casing 10 and, further, is discharged, throughoutdoor exhaust port 4 andindoor exhaust port 2. - Heat exchanging devices immediately after
outdoor suction port 3 in air-supply air-flow path 12 and immediately afterindoor suction port 1 in air-exhaust air-flow path 13 are adjacent tooutdoor exhaust port 4 andindoor exhaust port 2, respectively. Therefore, the areas of the air-flow paths are minimized, thereby maximizing the ventilation resistances therein. To cope therewith, in the heat exchanger according to the first exemplary embodiment of the present invention, second stackingpitch 15 b of the heat transfer plates inheat exchanging devices outdoor suction port 3 in air-supply air-flow path 12 and immediately afterindoor suction port 1 of air-exhaust air-flow path 13 is locally made larger. As a result thereof, the ventilation resistances immediately afteroutdoor suction port 3 and immediately afterindoor suction port 1 can be decreased, without largely degrading the heat exchanging efficiency. - Further, as illustrated in
FIG. 3C , third stackingpitch 15 c ofheat transfer plates 20 inheat exchanging devices 11 c which are positioned in the middle of air-supply air-flow path 12 and, also, in the middle of air-exhaust air-flow path 13 is made smaller than first stackingpitch 15 a. - Air inside the room and outdoor air is sucked through
indoor suction port 1 andoutdoor suction port 3, respectively, and part of the sucked air flows insideheat exchanging devices 11 c includingheat transfer plates 20 having third stackingpitch 15 c defined as smaller. Further, part of the sucked air is sucked into air-exhaust fan casing 9 and air-supply fan casing 10 and is discharged, throughoutdoor exhaust port 4 andindoor exhaust port 2. - In the heat exchanger according to the first exemplary embodiment of the present invention,
heat exchanging devices 11 c are spaced apart fromoutdoor suction port 3 in air-supply air-flow path 12 and fromindoor suction port 1 in air-exhaust air-flow path 13 and are positioned in the middle of the respective air-flow paths. Heat exchangingdevices 11 c are spaced apart from the minimum-distance air-flow path portions through which larger amounts of air flow fromindoor suction port 1 toward air-exhaust fan casing 9 and fromoutdoor suction port 3 toward air-supply fan casing 10. Therefore,heat exchanging devices 11 c are less influenced by pressure losses induced by air flows. Accordingly, even though third stackingpitch 15 c ofheat transfer plates 20 inheat exchanging devices 11 c is locally made smaller, the ventilation resistance inapparatus body 5 is prevented from being significantly increased. Further, theseheat exchanging devices 11 c can attain larger amounts of heat exchanges than those byheat exchanging devices 11 placed immediately afteroutdoor suction port 3 andindoor suction port 1, thereby increasing the heat exchanging efficiency of the entire heat exchanger. -
FIG. 4 is a perspective view illustrating sizes of heat exchanging devices in a stacking direction therein, in the heat exchanger according to the first exemplary embodiment of the present invention. Heat exchangingdevices 11 are adapted such that their sizes in the direction of stackingpitch 15 of heat transfer plates 20 (sizes 16 in the stacking direction therein) are different from each other. - By doing this, with the plurality of
heat exchanging devices 11 havingdifferent sizes 16 in the stacking direction ofheat transfer plates 20, it is possible to clarify the positions at which heat exchangingdevices 11 should be mounted,inside apparatus body 5, thereby preventing the occurrence of mistakes in mountingheat exchanging devices 11. This enables certainly mountingheat exchanging devices 11 during the fabrication ofapparatus body 5 and, in addition thereto, enables improvement of the maintainability ofheat exchanging devices 11 being used, during cleaning thereof, and the like. -
FIG. 5 is a perspective view illustrating the structure of heat exchanging devices employing a mixture of different stacking pitches, in the heat exchanger according to the first exemplary embodiment of the present invention. Individualheat exchanging devices 11 placed on the outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10 may be formed to have a mixture of different stacking pitches 15. - By doing this, it is possible to adjust the heat exchanging efficiency and the ventilation resistance inside
apparatus body 5, throughheat exchanging devices 11 themselves, rather than through mixed placement ofheat exchanging devices 11. Further, it is possible to mountheat exchanging devices 11 inapparatus body 5 without inducing mistakes. This enables certainly mountingheat exchanging devices 11 therein during the fabrication ofapparatus body 5. Further, it is possible to improve the maintainability ofheat exchanging devices 11 being used, during cleaning thereof, and the like. -
FIG. 6 is a bottom structure view illustrating placement of bypass air-flow paths in a heat exchanger according to a second exemplary embodiment of the present invention.FIG. 7 is a perspective view illustrating the structure of the bypass air-flow paths in the heat exchanger. In the second exemplary embodiment of the present invention, the same components as those of the first exemplary embodiment will be designated by the same reference marks and will not be described herein, in detail. - As illustrated in
FIG. 6 , in the heat exchanger according to the second exemplary embodiment of the present invention, a plurality ofheat exchanging devices 11 are placed and, also, bypass air-flow paths 17 (FIG. 7 ) are placed, on the outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10. Specifically, part of air passing through air-supply air-flow path 12 is directly sucked into air-supply blade 7 through bypass air-flow paths 17 and, then, is directly supplied to the inside of the room. On the other hand, part of air passing through air-exhaust air-flow path 13 is directly sucked into air-exhaust blade 6 through bypass air-flow paths 17 and, then, is directly discharged to the outdoor. - In the heat exchanger according to the second exemplary embodiment of the present invention,
heat exchanging devices 11 and bypass air-flow paths 17 are placed such that they are mixed therein. As a result thereof, by adjusting the positions at which bypass air-flow paths 17 are placed, it is possible to adjust the heat exchanging efficiency of the heat exchanger and the ventilation resistance insideapparatus body 5. -
FIG. 8 is a bottom structure view illustrating placement of bypass air-flow paths in the heat exchanger according to the second exemplary embodiment of the present invention. In the heat exchanger, bypass air-flow paths 17 illustrated inFIG. 8 are placed on the entire outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10. - By doing this, it is possible to realize a blower capable of supplying air and exhausting air at the same time, while maintaining the shape of
apparatus body 5. -
FIG. 9 is a bottom structure view illustrating placement of filters in bypass air-flow paths in the heat exchanger according to the second exemplary embodiment of the present invention. In the heat exchanger, bypass air-flow paths 17 provided withfilters 18 inside thereof are placed on the outer peripheral portions of air-exhaust fan casing 9 and air-supply fan casing 10. - By doing this, it is possible to purify air to be supplied to the inside of the room, without providing an additional filter
outside apparatus body 5. - As
filters 18 mounted in bypass air-flow paths 17, it is possible to employ dust filters and deodorization filters. - Further, as
filters 18 mounted in bypass air-flow paths 17, it is possible to employ acoustical materials, which can reduce ventilation noises insideapparatus body 5. - It is possible to reduce the ventilation resistance inside the apparatus body without largely degrading the heat exchanging efficiency and, therefore, the present invention can be applied to applications of blowing apparatuses and the like which include heat exchangers required to have reduced ventilation resistances in the apparatus bodies in such a way as to maintain the sizes of the apparatus bodies.
-
- 1 Indoor suction port
- 2 Indoor exhaust port
- 3 Outdoor suction port
- 4 Outdoor exhaust port
- 5 Apparatus body
- 6 Air-exhaust blade
- 7 Air-supply blade
- 8 Motor
- 9 Air-exhaust fan casing
- 10 Air-supply fan casing
- 11, 11 a, 11 b, and 11 c Heat exchanging device
- 12 Air-supply air-flow path
- 13 Air-exhaust air-flow path
- 14 Exhaust pipe
- 15 Stacking pitch (of heat transfer plates)
- 15 a First stacking pitch
- 15 b Second stacking pitch
- 15 c Third stacking pitch
- 16 Size in the stacking direction
- 17 Bypass air-flow path
- 18 Filter
- 20 Heat transfer plate
Claims (15)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009207710A JP5333084B2 (en) | 2009-09-09 | 2009-09-09 | Heat exchange equipment |
JP2009-207710 | 2009-09-09 | ||
PCT/JP2010/005480 WO2011030535A1 (en) | 2009-09-09 | 2010-09-07 | Heat exchanger |
Publications (1)
Publication Number | Publication Date |
---|---|
US20120152503A1 true US20120152503A1 (en) | 2012-06-21 |
Family
ID=43732215
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/393,868 Abandoned US20120152503A1 (en) | 2009-09-09 | 2010-09-07 | Heat exchanger |
Country Status (5)
Country | Link |
---|---|
US (1) | US20120152503A1 (en) |
JP (1) | JP5333084B2 (en) |
KR (1) | KR101287238B1 (en) |
CN (1) | CN102549345B (en) |
WO (1) | WO2011030535A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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ES2447642A1 (en) * | 2012-09-11 | 2014-03-12 | Soler & Palau Research, S.L. | Heat recovery unit for controlled mechanical ventilation systems |
US20150253019A1 (en) * | 2012-06-15 | 2015-09-10 | Global Plasma Solutions, Llc | Ion generation device |
US11041654B2 (en) * | 2018-02-01 | 2021-06-22 | Berg Companies, Inc. | Air handling unit |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN115218322B (en) * | 2021-04-18 | 2024-05-24 | 大金工业株式会社 | Air treatment device |
CN114151902B (en) * | 2021-12-01 | 2022-12-13 | 珠海格力电器股份有限公司 | Air duct assembly, fresh air environment control all-in-one machine and control method thereof |
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Also Published As
Publication number | Publication date |
---|---|
KR20120041792A (en) | 2012-05-02 |
CN102549345B (en) | 2014-07-23 |
KR101287238B1 (en) | 2013-07-17 |
CN102549345A (en) | 2012-07-04 |
WO2011030535A1 (en) | 2011-03-17 |
JP5333084B2 (en) | 2013-11-06 |
JP2011058701A (en) | 2011-03-24 |
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