WO2023276511A1 - 換気装置 - Google Patents
換気装置 Download PDFInfo
- Publication number
- WO2023276511A1 WO2023276511A1 PCT/JP2022/021807 JP2022021807W WO2023276511A1 WO 2023276511 A1 WO2023276511 A1 WO 2023276511A1 JP 2022021807 W JP2022021807 W JP 2022021807W WO 2023276511 A1 WO2023276511 A1 WO 2023276511A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat exchanger
- air
- air supply
- exhaust
- casing
- Prior art date
Links
- 238000009423 ventilation Methods 0.000 title claims description 24
- 238000007599 discharging Methods 0.000 claims description 4
- 239000003507 refrigerant Substances 0.000 description 48
- 230000004308 accommodation Effects 0.000 description 41
- 230000007246 mechanism Effects 0.000 description 16
- 238000001816 cooling Methods 0.000 description 12
- 238000010438 heat treatment Methods 0.000 description 11
- 238000007689 inspection Methods 0.000 description 9
- 238000005192 partition Methods 0.000 description 8
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005057 refrigeration Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RWRIWBAIICGTTQ-UHFFFAOYSA-N difluoromethane Chemical compound FCF RWRIWBAIICGTTQ-UHFFFAOYSA-N 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 229920006248 expandable polystyrene Polymers 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Images
Classifications
-
- 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
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- 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
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems
-
- 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
-
- 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
- This disclosure relates to a ventilation device.
- the ventilator disclosed in Patent Document 1 is of a floor type.
- the ventilator comprises a casing, a heat exchange element (first heat exchanger) and a cooling and heating coil (second heat exchanger).
- the casing is formed in a vertically long box shape.
- a heat exchange element is positioned above the cooling and heating coils.
- the present disclosure is to reduce the height of the ventilation device.
- the ventilator of the first aspect comprises a casing (12) in which an air supply passage (13) for supplying outdoor air to the room and an exhaust passage (14) for discharging the indoor air to the outside of the room are formed; a first heat exchanger (21) for exchanging heat between the air flowing through the passage (13) and the air flowing through the exhaust passage (14); and the first heat exchanger (21) in the air supply passage (13). and a second heat exchanger (25) disposed downstream, wherein the first heat exchanger (21) and the second heat exchanger (25) are located on the lower surface of the casing (12). Arranged in a first direction along the surface (12b), the first heat exchanger (21) overlaps the second heat exchanger (25) when viewed in the first direction.
- the first heat exchanger (21) and the second heat exchanger (25) are arranged in the first direction along the lower surface of the casing (12).
- the first heat exchanger (21) and the second heat exchanger (25) overlap each other when viewed in the first direction. Therefore, the height of the casing (12) can be shortened.
- the first surface (12b) is formed with an inside air intake port (o4) for introducing the room air into the exhaust passage (14),
- the heat exchanger (21) has an exhaust side inflow surface (21d) into which the air of the exhaust passage (14) flows, and the exhaust side inflow surface (21d) is positioned along the inside air inlet (o4). It is in.
- the inside air intake port (o4) is formed in the first surface (12b), which is the lower surface of the casing (12). Since the exhaust side inflow surface (21d) of the first heat exchanger (21) is located along the inside air intake port (o4), the flow of air from the inside air intake port (o4) to the exhaust side inflow surface (21d) is The flow path can be shortened. Thereby, the height of the casing (12) can be shortened.
- the first heat exchanger (21) has an air supply side outflow surface (21c) from which the air in the air supply passage (13) flows out
- the second heat exchanger (25) has an inflow surface (25b) into which air flows, and the air supply side outflow surface (21c) faces the inflow surface (25b).
- the air supply side outflow surface (21c) of the first heat exchanger (21) does not face the inflow surface (25b) of the second heat exchanger (25), the inflow surface (25b) of the second heat exchanger (25) In 25b), the air may drift. This is because the air flow on the inflow side of the second heat exchanger (25) may be biased.
- the air supply side outflow surface (21c) of the first heat exchanger (21) overlaps the inflow surface (25b) of the second heat exchanger (25). Since the first heat exchanger (21) is designed so that air does not drift, the air tends to flow out evenly from the air supply side outflow surface (21c). As a result, it is possible to prevent the air from drifting along the inflow surface (25b) of the first heat exchanger (21).
- a fourth aspect is, in any one of the first to third aspects, when viewed from a second direction perpendicular to the air supply side outflow surface (21c), the air supply side outflow surface (21c) and It overlaps with the inflow surface (25b) via a space.
- the air supply side outflow surface (21c) and the inflow surface (25b) overlap in the second direction perpendicular to the air supply side outflow surface (21c). Therefore, relatively uniform air flowing out from the air supply side outflow surface (21c) of the first heat exchanger (21) can be directly sent to the inflow surface (25b) of the second heat exchanger (25). . As a result, it is possible to prevent the air from drifting along the inflow surface (25b) of the first heat exchanger (21).
- the area where the projected plane of the air supply side outflow surface (21c) and the projected plane of the inflow surface (25b) overlap is It is 1/2 or more of the area of the air supply side outflow surface (21c).
- the air supply side outflow surface (21c) and the inflow surface (25b) overlap over half or more of the air supply side outflow surface when viewed from the second direction.
- relatively uniform air flowing out from the air supply side outflow surface (21c) of the first heat exchanger (21) is easily sent to the inflow surface (25b) as it is.
- the first heat exchanger (21) and the second heat exchanger (25) when viewed in the first direction, the first heat exchanger (21) and the second heat exchanger (25) The overlapping height ha is 60% or more of the height h1 of the first heat exchanger (21).
- the height of the casing (12) can be shortened.
- the area of the inflow surface (25b) is larger than the area of the air supply side outflow surface (21c).
- the seventh aspect it is possible to suppress the reduction of the channel cross-sectional area of the air supply path (13) in the second heat exchanger (25). As a result, it is possible to suppress an increase in pressure loss in the air supply passage (13) due to a reduction in the cross-sectional area of the flow path in the second heat exchanger (25).
- the casing (12) has an outside air suction port (o1) for introducing the outside air into the air supply passage (13).
- the air supply path (13) extends linearly in the first direction through the outside air inlet (o1), the first heat exchanger (21), and the second heat exchanger (25). extends to
- the air supply path (13) of the eighth aspect is a flow path extending linearly in the first direction through the outside air inlet (o1), the first heat exchanger (21), and the second heat exchanger (25). including. Therefore, it is possible to suppress a change in the direction of the air flow in the air supply passage (13), thereby suppressing an increase in pressure loss in the air supply passage (13).
- a ninth aspect is the eighth aspect, further comprising an air supply fan (22) for conveying air in the air supply path (13), wherein the air supply path (13) includes the outside air inlet (o1), It extends linearly in the first direction across the first heat exchanger (21), the second heat exchanger (25), and the air supply fan (22).
- the air supply path (13) of the ninth aspect extends in the first direction through the outside air inlet (o1), the first heat exchanger (21), the second heat exchanger (25), and the supply fan (22). It includes a channel extending linearly to the Therefore, it is possible to suppress a change in the direction of the air flow in the air supply passage (13), thereby suppressing an increase in pressure loss in the air supply passage (13).
- the air supply fan (22) is located downstream of the second heat exchanger (25), the air is blown out from the air supply fan (22) toward the inflow surface (25b) of the second heat exchanger (25). Compared to the configuration, the drift of the air flowing into the second heat exchanger (25) can be suppressed.
- the casing (12) is formed with an air supply port (o3) for supplying the air in the air supply passage (13) to the indoor space (5)
- the air supply path (13) includes the outside air suction port (o1), the first heat exchanger (21), the second heat exchanger (25), the air supply fan (22), and the air supply port ( o3) extending linearly in the first direction.
- the air supply path (13) of the tenth aspect includes an outside air intake (o1), a first heat exchanger (21), a second heat exchanger (25), an air supply fan (22), and an air supply port ( o3) extending linearly in the first direction. Therefore, it is possible to suppress a change in the direction of the air flow in the air supply passage (13), thereby suppressing an increase in pressure loss in the air supply passage (13).
- an exhaust fan (23) for conveying the air in the exhaust passage (14) is provided, and the exhaust fan (23) moves in the first direction. When viewed, it overlaps the second heat exchanger (25).
- the height of the casing (12) can be reduced by overlapping the exhaust fan (23) and the second heat exchanger (25) when viewed in the first direction.
- FIG. 1 is a schematic configuration diagram of a building in which the ventilation system of Embodiment 1 is installed.
- FIG. 2 is a schematic configuration diagram of a refrigerant circuit of a ventilator.
- FIG. 3 is a perspective view showing the appearance of the ventilator. 4 is a cross-sectional view taken along line IV-IV of FIG. 3.
- FIG. 5 is a cross-sectional view taken along line VV of FIG. 4.
- FIG. FIG. 6 is a bottom view of the ventilator.
- FIG. 7 is a front view of the inflow surface of the utilization heat exchanger as seen from the front side.
- the ventilator (10) of the present disclosure ventilates the indoor space (5).
- a ventilator (10) ventilates an indoor space (5) of a building such as a general house.
- the ventilator (10) supplies outdoor air (OA) in the outdoor space (6) to the room as supply air (SA).
- SA supply air
- the ventilator (10) discharges indoor air (RA) in the indoor space (5) to the outside as exhaust air (EA).
- the “indoor space” referred to here includes a living room such as a living room and a non-living room such as a corridor.
- a ventilator (10) regulates the temperature of the air in the indoor space (5).
- the ventilator (10) performs cooling operation and heating operation.
- the ventilation device (10) has a ventilation unit (11).
- the ventilation unit (11) is arranged in the ceiling space (8) behind the ceiling (7).
- the ventilation unit (11) of this example is a horizontal ventilation unit.
- the ventilation unit (11) has a casing (12).
- the ventilation unit (11) is arranged in such a posture that the longitudinal direction of the casing (12) is substantially horizontal.
- the casing (12) is formed with an air supply path (13) and an exhaust path (14).
- the air supply path (13) is a flow path for supplying outdoor air (OA) indoors.
- the exhaust path (14) is a flow path for discharging indoor air (RA) to the outside of the room.
- the ventilation unit (11) has a supply air fan (22), an exhaust fan (23), a total heat exchanger (21) and a utilization heat exchanger (25).
- the ventilator (10) has a heat source unit (80).
- the heat source unit (80) and the heat utilization heat exchanger (25) are connected via a first communication pipe (86) and a second communication pipe (87).
- a refrigerant circuit (R) is configured by connecting the pipes.
- the refrigerant circuit (R) is filled with refrigerant.
- a refrigerant corresponds to the heat medium of the present disclosure.
- the refrigerant is, for example, R32 (difluoromethane).
- the refrigerant circuit (R) performs a refrigeration cycle by circulating refrigerant.
- the first communication pipe (86) is a gas-side communication pipe.
- the second communication pipe (87) is a liquid-side communication pipe.
- the ventilation unit (11) is connected to an outside air duct (D1), an exhaust duct (D2), and an air supply duct (D3).
- the inflow end of the outdoor air duct (D1) is connected to the outdoor space (6).
- the outflow end of the outside air duct (D1) is connected to the inflow end of the air supply passage (13).
- the inflow end of the exhaust duct (D2) is connected to the outflow end of the exhaust path (14).
- the outflow end of the exhaust duct (D2) is connected to the outdoor space (6).
- the inflow end of the air supply duct (D3) is connected to the outflow end of the air supply path (13).
- the outflow end of the supply air duct (D3) leads to the interior space (5).
- Detailed structure of ventilation unit It comprises a fan (22), an exhaust fan (23), a heat utilization heat exchanger (25), a refrigerant pipe connection (27), a drain pan (28) and a pump (29).
- top”, “bottom”, “left”, “right”, “front”, and “back” are directions when the ventilation unit (11) is viewed from the front as shown in FIGS. .
- the front face of the ventilation unit (11) is a side surface provided with a first duct connection portion (C1) and a second duct connection portion (C2), which will be described later.
- the casing (12) is arranged in the ceiling space (8). As shown in FIGS. 1 and 3-5, the casing (12) is shaped like a rectangular parallelepiped. The casing (12) extends longitudinally along the ceiling (7). In this example, the longitudinal direction of the casing (12) corresponds to the front-rear direction.
- the casing (12) is shaped like a hollow box. In other words, an internal space (16) is formed within the casing (12).
- the casing (12) has an upper plate (12a), a lower plate (12b) and four side plates. The four side plates include a first side plate (12c) and a second side plate (12d) facing each other.
- the upper plate (12a) constitutes the upper surface of the casing (12).
- the lower plate (12b) constitutes the lower surface of the casing (12).
- the upper plate (12a) and the lower plate face each other.
- the first side plate (12c) constitutes a side surface of the casing (12) on the front side in the front-rear direction (one end side in the longitudinal direction).
- the second side plate (12d) constitutes a side surface of the casing (12) on the rear side in the front-rear direction (on the other end side in the longitudinal direction).
- the upper plate (12a) and the lower plate (12b) extend substantially horizontally.
- the first side plate (12c) and the second side plate (12d) extend substantially vertically.
- the first side plate (12c) is provided with a first duct connection portion (C1) and a second duct connection portion (C2) via a duct fixing member (17).
- the duct fixing member (17) is arranged at the front end inside the casing (12).
- the duct fixing member (17) has a rectangular parallelepiped main body and two cylinders protruding forward from the front side surface of the main body.
- a first duct connection (C1) and a second duct connection (C2) are arranged inside each tube.
- the first duct connection part (C1) and the second duct connection part (C2) are formed in a cylindrical shape.
- the first duct connection portion (C1) and the second duct connection portion (C2) protrude forward (laterally) from the outer surface of the first side plate (12c).
- one first duct connection (C1) and one second duct connection (C2) are provided.
- An outflow end of an outside air duct (D1) is connected to the first duct connection portion (C1).
- the inflow end of the exhaust duct (D2) is connected to the second duct connection (C2).
- an outside air suction port (o1) is formed inside the first duct connection port (C1).
- An exhaust port (o2) is formed inside the second duct connection port (c2).
- the outdoor air intake port (o1) is an opening for introducing outdoor air into the air supply passage (13).
- the exhaust port (o2) is an opening for discharging the air in the exhaust passage (14) to the outside of the room.
- the outside air intake port (o1) is located closer to the middle portion in the left-right direction of the first side plate (12c) than the exhaust port (o2).
- a third duct connection portion (C3) is provided on the second side plate (12d).
- the third duct connection portion (C3) is formed in a cylindrical shape.
- the third duct connection portion (C3) protrudes rearward (laterally) from the outer surface of the second side plate (12d).
- five third duct connections (C3) are provided.
- the inflow end of the air supply duct (D3) is connected to the third duct connection (C3).
- only one air supply duct (D3) is illustrated for convenience.
- an air supply port (o3) is formed inside the third connecting portion (C3).
- the air supply port (o3) is an opening for supplying the air in the air supply path (13) to the indoor space (5).
- an inspection opening (18) is formed in front of the lower surface of the casing (12).
- the inspection port (18) communicates with the internal space (16) of the casing (12).
- an interior panel (15) is provided below the inspection opening (18).
- the indoor panel (15) is arranged to cover the inspection door (18). As schematically shown in FIG. 1, the interior panel (15) is provided inside a ceiling opening (7a) passing through the ceiling (7). The interior panel (15) faces the interior space (5). The interior panel (15) is fixed to the casing (12) by fastening members (for example, bolts).
- the interior panel (15) is composed of a flat plate portion (15b) and a frame portion (15c). The flat plate portion (15b) closes the inspection port (18).
- the frame portion (15c) is a frame surrounding the flat plate portion (15b).
- the interior panel (15) is removable.
- a flat plate portion (15b) of the interior panel (15) is formed with an inside air intake port (15a).
- the inside air intake port (15a) is included in the inspection port (18). In other words, part of the inspection port (18) forms the suction port.
- the inside air suction port (15a) sucks in room air.
- the inside air intake port (15a) allows the indoor space (5) and the inflow end of the exhaust passage (14) to communicate with each other.
- the first storage section (31) is arranged on the front side in the casing (12).
- the first accommodation portion (31) is arranged above the inspection opening (18).
- the first storage section (31) is made of expanded polystyrene.
- the first accommodation portion (31) is formed in a rectangular parallelepiped shape.
- the first accommodating portion (31) is open at its upper and lower sides.
- the first housing portion (31) has a partition portion (32), a total heat exchanger housing portion (33), and a housing portion (34).
- the partition (32) is a plate-like portion formed above the center in the vertical direction of the first housing (31).
- the partition (32) partitions the space defined by the first accommodation portion (31) in the casing (12) into a total heat exchanger accommodation space (33a) and a fan accommodation space (34a).
- the total heat exchanger housing space (33a) is formed below the partition (32).
- the total heat exchanger housing space (33a) is a space surrounded by the total heat exchanger housing portion (33) and the indoor panel (15).
- the total heat exchanger housing portion (33) is a box-shaped portion.
- a total heat exchanger (21) and a filter (24) are arranged in the total heat exchanger housing space (33a).
- the fan accommodation space (34a) is formed above the partition (32).
- the fan accommodation space (34a) is a space surrounded by the housing portion (34) and the upper plate (12a) of the casing (12).
- the housing portion (34) is an arcuate portion surrounding the exhaust fan (23).
- the housing portion (34) extends upward from the partition portion (32).
- An exhaust fan (23) is arranged in the fan accommodation space (34a).
- a substantially rectangular first inlet (35) and a first outlet (36) are formed on the front side surface of the first housing portion (31).
- the first inlet (35) communicates with the total heat exchanger housing space (33a).
- the first inlet (35) communicates with the first duct connection portion (C1) via the duct fixing member (17).
- a flow path from the outflow end of the first duct connection portion (C1) to the front side surface of the total heat exchanger (21) via the first inlet (35) constitutes the first flow path (P1).
- the first flow path (P1) forms a flow path of the air supply path (13) on the upstream side of the total heat exchanger (21).
- the first outflow port (36) communicates with the fan housing space (34a).
- the first outflow port (36) communicates with the second duct connection portion (C2) via the duct fixing member (17).
- a substantially circular communication port (39) is formed in the partition (32).
- the communication port (39) is formed above the total heat exchanger (21).
- the communication port (39) communicates the total heat exchanger housing space (33a) and the fan housing space (34a).
- the flow path from the outflow end of the second duct connection portion (C2) to the upper surface of the total heat exchanger (21) via the first outflow port (36) and the communication port (39) is the second flow path (P2 ).
- the second flow path (P2) forms a flow path of the exhaust path (14) on the downstream side of the total heat exchanger (21).
- a substantially rectangular second outflow port (38) is formed on the rear side surface of the first housing portion (31).
- the second outlet (38) communicates with the total heat exchanger housing space (33a).
- a flow path from the rear side surface of the total heat exchanger (21) through the second outlet (38) to the inflow end of the third duct connection portion (C3) constitutes a third flow path (P3).
- the third flow path (P3) forms a flow path of the air supply path (13) on the downstream side of the total heat exchanger (21).
- a substantially rectangular second inlet (37) is formed below the first accommodation portion (31).
- the second inlet (37) communicates with the total heat exchanger housing space (33a).
- the second inlet (37) is formed above the inspection port (18) of the casing (12).
- a channel from the inside air inlet (15a) of the indoor panel (15) through the second inlet (37) to the lower surface of the total heat exchanger (21) constitutes a fourth channel (P4).
- the fourth flow path (P4) forms a flow path of the exhaust path (14) on the upstream side of the total heat exchanger (21).
- the second accommodation portion (41) is accommodated in the casing (12).
- the second accommodation portion (41) is arranged rearward and adjacent to the first accommodation portion (31).
- the second accommodation portion (41) is arranged centrally within the casing (12).
- the second housing portion (41) is made of resin.
- the second accommodation portion (41) is formed in a rectangular parallelepiped shape.
- the second accommodation portion (41) is arranged in the casing (12) such that its longitudinal direction is the left-right direction.
- the lateral length of the second accommodation portion (41) is longer than the lateral length of the first accommodation portion (31).
- the lateral length of the second accommodation portion (41) is substantially the same as the lateral length of the internal space (16) of the casing (12). In other words, the lateral length of the casing (12) is determined by the lateral length of the second housing portion (41).
- the second accommodation portion (41) has an open bottom surface.
- a utilization heat exchanger (25) and a pump (29) are arranged inside the second housing (41).
- An inflow port (42) is formed in the front side surface of the second housing portion (41).
- the inlet (42) is formed at a position corresponding to the second outlet (38) of the first accommodation portion (31).
- the inlet (42) communicates with the total heat exchanger accommodating space (33a) through the second outlet (38) of the first accommodating portion (31).
- An outflow port (43) is formed in the rear side surface of the second accommodation portion (41).
- the outflow port (43) is formed behind the utilization heat exchanger (25).
- a flow path from the inlet (42) to the outlet (43) in the second housing portion (41) constitutes part of the third flow path (P3).
- the third housing (51) is housed inside the casing (12).
- the third accommodation portion (51) is arranged rearward and adjacent to the second accommodation portion (41).
- the third accommodation portion (51) is arranged on the rear side in the casing (12).
- the third accommodation portion (51) is made of foamed polystyrene.
- the third housing portion (51) has a body portion (51a) and a duct fixing portion (51b).
- the main body (51a) has a rectangular parallelepiped shape.
- the third housing portion (51) is arranged in the casing (12) such that the longitudinal direction of the main body portion (51a) is the left-right direction.
- the duct fixing portion (51b) protrudes rearward from the rear side surface of the main body portion (51a).
- the duct fixing portion (51b) is formed in a tubular shape.
- a third duct connection portion (C3) is fixed to the duct fixing portion (51b).
- An air supply fan (22) is arranged inside the third accommodation portion (51).
- the lateral length of the third housing portion (51) is substantially the same as the lateral length of the first housing portion (31). In other words, the lateral length of the third accommodation portion (51) is shorter than the lateral length of the second accommodation portion (41).
- a substantially rectangular inlet (52) is formed on the front side surface of the third accommodation portion (51).
- the inlet (52) is formed at a position corresponding to the outlet (43) of the second accommodation portion (41).
- the inflow port (52) communicates with the internal space of the second accommodation portion (41) through the outflow port (43) of the second accommodation portion (41).
- An outflow port (53) is formed on the rear side surface of the third housing portion (51).
- Five outlets (53) are formed in this example.
- a third duct connection portion (C3) is connected to each outflow port (53).
- a flow passage from the inflow port (42) of the third housing portion (51) to the inflow end of the third duct connection portion (C3) constitutes part of the third flow passage (P3).
- the total heat exchanger (21) corresponds to the first heat exchanger of the present disclosure.
- the total heat exchanger (21) is arranged in the total heat exchanger accommodating space (33a) in the first accommodating portion (31).
- the total heat exchanger (21) exchanges heat between air flowing through the air supply passage (13) and air flowing through the exhaust passage (14).
- a supply side internal flow path (21a) and an exhaust side internal flow path (21b) are formed inside the total heat exchanger (21).
- the air supply side internal flow path (21a) and the exhaust side internal flow path (21b) are orthogonal to each other.
- the inflow part of the air supply side internal flow path (21a) is connected to the first flow path (P1).
- An outflow portion of the air supply side internal channel (21a) is connected to the third channel (P3).
- An inflow portion of the exhaust-side internal channel (21b) is connected to the fourth channel (P4).
- An outflow portion of the exhaust-side internal channel (21b) is connected to the second channel (P2).
- the total heat exchanger (21) transfers heat between the air in the supply side internal flow path (21a) and the air in the exhaust side internal flow path (21b).
- the total heat exchanger (21) moves moisture between the air in the air supply side internal flow path (21a) and the air in the exhaust side internal flow path (21b).
- the total heat exchanger (21) exchanges latent heat and sensible heat between the air in the air supply side internal flow path (21a) and the air in the exhaust side internal flow path (21b).
- the total heat exchanger (21) is arranged such that the inflow surface of the exhaust side internal flow path (21b) is along the opening surface of the internal air intake port (15a).
- the air flowing through the exhaust-side internal flow path (21b) flows substantially vertically.
- the air flowing through the exhaust-side internal flow path (21b) flows from bottom to top.
- the air flowing through the air supply side internal flow path (21a) flows substantially horizontally.
- the air flowing through the air supply side internal channel (21a) flows from front to rear.
- the ventilation unit (11) has a filter (24).
- a filter (24) is arranged in the first flow path (P1).
- the filter (24) is arranged upstream of the total heat exchanger (21) in the air supply path (13).
- the filter (24) is arranged between the first inlet (35) in the first housing (31) and the total heat exchanger (21).
- the filter (24) collects dust in outdoor air (OA).
- a filter may be provided in the fourth channel (P4).
- the air supply fan (22) is arranged in the third flow path (P3).
- the air supply fan (22) is housed inside the third housing (51).
- the air supply fan (22) conveys the air in the air supply path (13).
- the air supply fan (22) is of the Sirocco type.
- the air supply fan (22) may be of turbo type or propeller type.
- the air supply fan (22) is driven by the first motor (M1).
- the rotation speed of the first motor (M1) is variable.
- the first motor (M1) is a regulated DC fan motor.
- the air supply fan (22) is configured such that its air volume is variable.
- the air supply fan (22) is fixed to the third housing via the housing.
- the exhaust fan (23) is arranged in the second flow path (P2).
- the exhaust fan (23) is accommodated in the fan accommodation space (34a) in the first accommodation portion (31).
- the exhaust fan (23) conveys the air in the exhaust path (14).
- the exhaust fan (23) is of the Sirocco type.
- the exhaust fan (23) may be of turbo type or propeller type.
- the exhaust fan (23) is driven by the second motor (M2).
- the rotation speed of the second motor (M2) is variable.
- the second motor (M2) is a regulated DC fan motor.
- the exhaust fan (23) is configured to have a variable air volume.
- the second motor (M2) is fixed to the front side of the upper plate (12a) of the casing (12) in the longitudinal direction. In other words, the second motor (M2) is fixed to the top of the first housing (31).
- the exhaust fan (23) is arranged below the second motor (M2).
- the utilization heat exchanger (25) corresponds to the second heat exchanger of the present disclosure.
- the utilization heat exchanger (25) is arranged in the third flow path (P3).
- the utilization heat exchanger (25) is arranged downstream of the total heat exchanger (21) in the air supply path (13).
- the utilization heat exchanger (25) is arranged in the third flow path (P3) between the air supply side internal flow path (21a) and the air supply fan (22).
- the utilization heat exchanger (25) is arranged on the left side inside the second accommodation section (41).
- the utilization heat exchanger (25) is arranged in a state inclined downward toward the rear.
- the utilization heat exchanger (25) is arranged at an angle of 45 degrees with respect to the vertical direction.
- the upper portion of the utilization heat exchanger (25) is supported on the upper surface of the second accommodation portion (41).
- a lower portion of the utilization heat exchanger (25) is supported by a drain pan (28).
- the utilization heat exchanger (25) exchanges heat between the refrigerant flowing inside and the air flowing through the air supply passage (13).
- the utilization heat exchanger (25) is a fin-and-tube air heat exchanger.
- the utilization heat exchanger (25) has many fins and heat transfer tubes (25a).
- the heat transfer tube (25a) extends in the direction in which the numerous fins are arranged. Refrigerant flows inside the heat transfer tube (25a).
- the heat exchanger (25) used during cooling operation functions as an evaporator and cools the air.
- the heat exchanger (25) used during heating operation functions as a radiator (strictly speaking, a condenser) to heat the air.
- the ventilation unit (11) has a refrigerant pipe connection portion (27).
- the refrigerant pipe connection (27) corresponds to the connection of the present disclosure.
- the refrigerant pipe connecting portion (27) is arranged on the right side of the first accommodating portion (31) in the internal space (16) of the casing (12).
- the refrigerant pipe connecting portion (27) is a connector that connects the utilization heat exchanger (25) and the connecting pipes (86, 87).
- the ventilation unit (11) has a first refrigerant pipe connection (27a) and a second refrigerant pipe connection (27b).
- the drain pan (28) is arranged above the lower plate (12b) of the casing (12).
- the drain pan (28) rests on the bottom plate (12b) of the casing (12).
- the drain pan (28) is arranged below the utilization heat exchanger (25).
- the drain pan (28) is arranged below the second accommodation portion (41).
- the drain pan (28) closes the lower side of the second accommodation portion (41).
- the drain pan (28) is shaped like an open top.
- the drain pan (28) receives condensed water generated around the utilization heat exchanger (25).
- the pump (29) is arranged inside the second storage section (41).
- the pump (29) is arranged above the drain pan (28).
- the pump (29) is arranged on the right side of the utilization heat exchanger (25). In other words, the pump (29) is arranged on the right side of the internal space of the second accommodation portion (41).
- the pump (29) drains the water in the drain pan (28).
- the pump (29) sucks water from its lower part.
- the pump (29) is connected to a drain pipe (29a) via a drain relay pipe (not shown) and a drain pipe connector (29b).
- the drain pipe (29a) is arranged outside the second housing (41).
- the drainage relay pipe connects the upper portion of the pump (29) and the drainage pipe connector (29b).
- the drainage relay pipe is arranged inside the second accommodation portion (41).
- the drain pipe connection (29b) is a connector that connects the drain relay pipe and the drain pipe (29a).
- the drain pipe connection (29b) is arranged in the internal space (16) of the casing (12).
- the drain pipe connection portion (29b) is fixed through the front side surface of the second housing portion (41).
- the drain pipe connection (29b) is arranged above the pump (29).
- the drain pipe connection (29b) is arranged above the first refrigerant pipe connection (27a) and the second refrigerant pipe connection (27b).
- the drain pipe (29a) is arranged in the casing (12) on the right side of the first housing portion (31).
- the heat source unit (80) shown in FIG. 2 is arranged in the outdoor space (6).
- the heat source unit (80) has a heat source fan (81).
- the heat source unit (80) has a compressor (82), a heat source heat exchanger (83), a switching mechanism (84) and an expansion valve (85) as elements of the refrigerant circuit (R).
- the compressor (82) compresses the sucked refrigerant.
- the compressor (82) discharges compressed refrigerant.
- the compressor (82) is a rotary compressor such as a swing piston type, a rolling piston type, or a scroll type.
- the compressor (82) is of an inverter type.
- the heat source fan (81) is arranged near the heat source heat exchanger (83).
- the heat source fan (81) of this example is a propeller fan.
- the heat source fan (81) conveys air passing through the heat source heat exchanger (83).
- the switching mechanism (84) changes the flow path of the refrigerant circuit (R) so as to switch between the first refrigerating cycle, which is the cooling cycle, and the second refrigerating cycle, which is the heating cycle.
- the switching mechanism (84) is a four-way switching valve.
- the switching mechanism (84) has a first port (84a), a second port (84b), a third port (84c) and a fourth port (84d).
- a first port (84a) of the switching mechanism (84) is connected to a discharge portion of the compressor (82).
- the second port (84b) of the switching mechanism (84) is connected to the suction portion of the compressor (82).
- the third port (84c) of the switching mechanism (84) is connected to the gas side end of the heat utilization heat exchanger (25) via the first communication pipe (86).
- the fourth port (84d) of the switching mechanism (84) is connected to the gas side end of the heat source heat exchanger (83).
- the switching mechanism (84) switches between the first state and the second state.
- the switching mechanism (84) in the first state (the state indicated by the solid line in FIG. 3) communicates the first port (84a) and the fourth port (84d) and connects the second port (84b) and the third port (84c).
- the switching mechanism (84) in the second state (indicated by broken lines in FIG. 3) communicates between the first port (84a) and the third port (84c), and connects the second port (84b) and the fourth port (84d).
- the expansion valve (85) has one end connected to the liquid side end of the heat source heat exchanger (83) and the other end connected to the liquid side end of the utilization heat exchanger (25) via the second communication pipe (87). Connect.
- the expansion valve (85) is an electronic expansion valve whose degree of opening is adjustable.
- the refrigerant circuit (R) during cooling operation performs the first refrigeration cycle.
- the heat source heat exchanger (83) functions as a radiator
- the utilization heat exchanger (25) functions as an evaporator.
- the refrigerant compressed by the compressor (82) flows through the heat source heat exchanger (83).
- the refrigerant releases heat to the outdoor air and condenses.
- the refrigerant condensed in the heat source heat exchanger (83) is decompressed by the expansion valve (85) and then flows through the heat utilization heat exchanger (25).
- the heat utilization exchanger (25) the refrigerant absorbs heat from the air in the air supply passage (13) and evaporates.
- the refrigerant evaporated in the heat utilization exchanger (25) is sucked into the compressor (82).
- indoor air (RA) is taken into the fourth flow path (P4) as the exhaust fan (23) operates.
- Outdoor air (OA) is taken into the first flow path (P1) as the air supply fan (22) operates.
- the air in the first flow path (P1) flows through the air supply side internal flow path (21a) of the total heat exchanger (21).
- the air in the fourth flow path (P4) flows through the exhaust-side internal flow path (21b) of the total heat exchanger (21).
- the indoor space (5) is cooled by another air conditioner (A) shown in FIG.
- the temperature of the indoor air (RA) will be lower than the temperature of the outdoor air (OA).
- indoor air (RA) humidity will be lower than outdoor air (OA) humidity. Therefore, in the total heat exchanger (21), the air in the supply side internal flow path (21a) is cooled by the air in the exhaust side internal flow path (21b). At the same time, in the total heat exchanger (21), moisture in the air in the supply side internal flow path (21a) moves to the air in the exhaust side internal flow path (21b).
- This air is cooled by the utilization heat exchanger (25).
- the cooled air flows through the supply air duct (D3) and is supplied to the interior space (5) as supply air (SA).
- the refrigerant circuit (R) during heating operation performs the second refrigeration cycle.
- the utilization heat exchanger (25) functions as a radiator
- the heat source heat exchanger (83) functions as an evaporator.
- the refrigerant compressed by the compressor (82) flows through the utilization heat exchanger (25).
- the utilization heat exchanger (25) the refrigerant releases heat to the room air and condenses.
- the refrigerant condensed in the heat utilization heat exchanger (25) is decompressed by the expansion valve (85) and then flows through the heat source heat exchanger (83).
- the heat source heat exchanger (83) the refrigerant absorbs heat from outdoor air and evaporates.
- the refrigerant evaporated in the heat source heat exchanger (83) is drawn into the compressor (82).
- the indoor space (5) is heated by another air conditioner (A) shown in FIG.
- the temperature of the indoor air (RA) will be higher than the temperature of the outdoor air (OA).
- indoor air (RA) humidity will be higher than outdoor air (OA) humidity. Therefore, in the total heat exchanger (21), the air in the supply side internal flow path (21a) is heated by the air in the exhaust side internal flow path (21b). At the same time, in the total heat exchanger (21), moisture in the air in the exhaust side internal flow path (21b) moves to the air in the air supply side internal flow path (21a).
- the total heat exchanger (21) and the utilization heat exchanger (25) are defined by arranged in a first direction along (12b). Strictly speaking, the first direction is the direction across the first side plate (12c) and the second side plate (12d).
- the first side plate (12c) is a side surface of the casing (12) on which the external air inlet (o1) is formed.
- the second side plate (12d) is a side surface of the casing (12) on which the air supply port (o3) is formed.
- the first direction in this example corresponds to the front-rear direction in the horizontal direction.
- the total heat exchanger (21) overlaps the utilization heat exchanger (25) when viewed in the first direction.
- the air supply side outflow surface (21c) of the total heat exchanger (21) is indicated by a two-dot chain line
- the inflow surface (25b) of the utilization heat exchanger (25) is indicated by a one-dot chain line.
- the air supply side outflow surface (21c) is a ventilation surface through which the air in the air supply side internal flow path (21a) of the total heat exchanger (21) flows out.
- the total heat exchanger (21) of this example is formed in a rectangular parallelepiped shape having six faces.
- the air supply side outflow surface (21c) corresponds to the rear vertical surface of the total heat exchanger (21).
- the inflow surface (25b) of the utilization heat exchanger (25) is a ventilation surface into which air flows in the utilization heat exchanger (25). Specifically, the inflow surface (25b) is formed between the left and right end portions (left and right end plate portions) of the front surface of the heat utilization heat exchanger (25).
- the vertical height of the casing can be reduced.
- the horizontal ventilator can be made compact in the vertical direction.
- the height of the total heat exchanger (21) is h1.
- ha be the height of the overlapping portion of the total heat exchanger (21) and the heat utilization heat exchanger (25) when viewed in the first direction (the paper surface direction of FIG. 7).
- the height ha is 60% or more of the height h1. In this way, by widening the area where the total heat exchanger (21) and the heat utilization heat exchanger (25) overlap in the height direction, the vertical height of the casing (12) can be reduced.
- the air supply side outflow surface (21c) of the total heat exchanger (21) faces the inflow surface (25b) of the utilization heat exchanger (25). As described above, air tends to flow out evenly from the air supply side outflow surface (21c). Therefore, by facing the air supply side outflow surface (21c) to the inflow surface (25b), air drift on the inflow surface (25b) of the heat utilization heat exchanger (25) can be suppressed.
- the air supply side outflow surface (21c) and the inflow surface (25b) overlap through a space.
- the second direction coincides with the first direction (front-rear direction).
- the projection surface of the air supply side outflow surface (21c) and the projection surface of the inflow surface are is 1/2 or more of the area of the air supply side outflow surface (21c).
- the ratio of the air flowing out of the air supply side outflow surface (21c) to be directly sent to the inflow surface (25b) is increased.
- drift of the air flowing into the heat utilization heat exchanger (25) can be suppressed.
- the area of the inflow surface (25b) of the utilization heat exchanger (25) is larger than the area of the air supply side outflow surface (21c).
- the exhaust fan (23) is arranged along the upper surface of the total heat exchanger (21).
- the exhaust fan (23) is arranged so as to vertically overlap the total heat exchanger (21).
- the exhaust fan (23) is placed horizontally so that the shaft of its second motor (M2) faces up and down. Thereby, the casing (12) can be made compact in the vertical direction.
- the exhaust fan (23) overlaps the utilization heat exchanger (25) when viewed in the first direction.
- the utilization heat exchanger (25) overlaps both the exhaust fan (23) and the total heat exchanger (21) when viewed in the first direction.
- the casing (12) can be made compact in the vertical direction.
- the air supply path (13) of this example includes an outside air intake (o1), a It extends linearly in the first direction across the heat exchanger (21), the utilization heat exchanger (25), the air supply fan (22), and the air supply port (o3).
- the air supply side internal flow path (21a) of the total heat exchanger (21) extends in the first direction.
- the first direction in this example is the front-rear direction.
- the air supply path (13) of the present example becomes a linear flow path that does not bend from the outside air suction port (o1) to the air supply port (o3).
- pressure loss in the long air supply passage (13) can be reduced.
- the casing (12) When viewed in the first direction, the outside air inlet (o1), the air supply side internal flow path (21a) of the total heat exchanger (21), the utilization heat exchanger (25), the air supply fan (22), and The air inlets (o3) overlap in the first direction. Thereby, the casing (12) can be made compact in the vertical direction.
- the exhaust side inflow surface (21d) of the total heat exchanger (21) is positioned along the internal air suction port (o4).
- the exhaust-side inflow surface (21d) is a ventilation surface into which air flows from the exhaust-side internal flow path (21b) of the total heat exchanger (21).
- the exhaust side inflow surface (21d) corresponds to the lower horizontal surface of the total heat exchanger (21).
- the total heat exchanger (21) overlaps the utilization heat exchanger (25) when viewed in the front-rear direction, which is the first direction. Thereby, the vertical height of the casing (12) can be reduced. In addition, it is possible to suppress drift of the air flowing into the utilization heat exchanger (25). As a result, it is possible to increase the substantial heat transfer area between the air and the refrigerant in the utilization heat exchanger (25).
- the total heat exchanger (21) has an exhaust side inflow surface (21d) into which air from the exhaust passage (14) flows.
- the exhaust side inflow surface (21d) is positioned along the inside air intake port (o4).
- the air supply side outflow surface (21c) of the total heat exchanger (21) faces the inflow surface (25b) of the utilization heat exchanger (25).
- the air supply fan (22) is arranged between the air supply side outflow surface (21c) and the heat utilization heat exchanger (25)
- the air blown out from the air supply fan (22) flows into the inflow surface (25b).
- air tends to flow uniformly over the entire area of the air supply side outflow surface (21c) of the total heat exchanger (21). Therefore, by facing the total heat exchanger (21) to the air supply side outflow surface (21c), it is possible to effectively suppress the drift of the air in the inflow surface (25b).
- the area of the intake side outflow surface (21c) where the projected surface of the intake side outflow surface (21c) and the projected surface of the inflow surface (25b) overlap is the area of the intake side outflow surface (21c). 1/2 or more. This makes it easier for the air flowing out of the air supply side outflow surface (21c) to be sent directly to the inflow surface (25b). As a result, drift in the inflow surface (25b) can be suppressed.
- the height ha of the first heat exchanger (21) and the second heat exchanger (25) overlap when viewed in the first direction is the height of the first heat exchanger (21). 60% or more of h1. Thereby, the vertical height of the casing (12) can be further reduced.
- the air supply path (13) includes an outside air intake port (o1), a total heat exchanger (21), a heat utilization heat exchanger (25), an air supply fan (22), and an air supply port (o3). extends linearly in the first direction over the Thereby, the total length of the air supply passage (13) can be shortened. It is also possible to suppress bending of the air flow. As a result, pressure loss in the air supply passage (13) can be reduced, and power consumption of the air supply fan (22) can be reduced.
- the exhaust fan (23) overlaps the utilization heat exchanger (25) when viewed in the first direction. Strictly speaking, the exhaust fan (23) and the total heat exchanger (21) are arranged one above the other, both of which overlap the utilization heat exchanger (25) in the first direction. Thereby, the vertical height of the casing (12) can be reduced.
- the air supply path (13) extends in the first direction through the outside air intake (o1), the total heat exchanger (21), and the utilization heat exchanger (25). It should extend in a straight line. In this case, the air supply path (13) does not have to linearly overlap the air supply port (o3) or the air supply fan (22) in the first direction.
- the air supply path (13) extends linearly in the first direction through the outside air inlet (o1), the total heat exchanger (21), the heat utilization heat exchanger (25), and the air supply fan (22). good too. In this case, the air supply path (13) does not have to linearly overlap the air supply port (o3) in the first direction.
- the pressure loss in the air supply path (13) can also be reduced in these configurations.
- the casing (12) can be shortened vertically.
- the entire air supply side outflow surface (21c) of the total heat exchanger (21) may overlap the inflow surface (25b) of the utilization heat exchanger (25) in the first direction.
- the height ha described above may be 80% or more of the height h1, or may be 100%.
- the first heat exchanger (21) may be a sensible heat exchanger that exchanges only sensible heat between the air flowing through the air supply path (13) and the air flowing through the exhaust path (14).
- the switching mechanism (84) does not have to be a four-way switching valve.
- the switching mechanism (84) may be configured by combining four flow paths and on-off valves for opening and closing these, or may be configured by combining two three-way valves.
- the expansion valve (26) may not be an electronic expansion valve, but may be a temperature-sensitive expansion valve or a rotary expansion mechanism.
- a plurality of air supply ducts (D3) may be connected to the air supply path (13).
- the outflow end of each of the plurality of air supply paths (13) is connected to one indoor space (5) or multiple indoor spaces (5).
- the air supply duct (D3) may have one main pipe connected to the air supply path (13) and a plurality of branch pipes branching from the main pipe. In this case, the outflow end of each branch pipe leads to one indoor space (5) or multiple indoor spaces (5).
- the present disclosure is useful for ventilators.
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Abstract
Description
以下、本開示の実施形態について、図面を参照しながら詳細に説明する。なお、本開示は、以下に示される実施形態に限定されるものではなく、本開示の技術的思想を逸脱しない範囲内で各種の変更が可能である。各図面は、本開示を概念的に説明するためのものであるから、理解の容易のために必要に応じて寸法、比、または数を、誇張あるいは簡略化して表す場合がある。
本開示の換気装置(10)は、室内空間(5)を換気する。図1に示すように、換気装置(10)は、一般家屋などの建物の室内空間(5)を換気する。換気装置(10)は、室外空間(6)の室外空気(OA)を供給空気(SA)として室内に供給する。同時に、換気装置(10)は、室内空間(5)の室内空気(RA)を排出空気(EA)として室外に排出する。ここでいう「室内空間」は、居間などの居室と、廊下などの非居室とを含む。換気装置(10)は、室内空間(5)の空気の温度を調節する。換気装置(10)は、冷房運転と暖房運転とを行う。
(2)ダクト
図1に示すように、換気ユニット(11)には、外気ダクト(D1)、排気ダクト(D2)、および給気ダクト(D3)が接続される。外気ダクト(D1)の流入端は、室外空間(6)に繋がる。外気ダクト(D1)の流出端は、給気路(13)の流入端に繋がる。排気ダクト(D2)の流入端は、排気路(14)の流出端に繋がる。排気ダクト(D2)の流出端は、室外空間(6)に繋がる。給気ダクト(D3)の流入端は、給気路(13)の流出端に繋がる。給気ダクト(D3)の流出端は室内空間(5)に繋がる。
換気ユニット(11)は、ケーシング(12)、第1~第3収容部(31,41,51)、全熱交換器(21)、フィルタ(24)、給気ファン(22)、排気ファン(23)、利用熱交換器(25)、冷媒管接続部(27)、ドレンパン(28)、およびポンプ(29)を備える。
ケーシング(12)は、天井裏空間(8)に配置される。図1および図3~5に示すように、ケーシング(12)は、直方体状に形成される。ケーシング(12)は、天井(7)に沿うように前後方向に延びている。本例では、ケーシング(12)の長手方向は、前後方向に対応する。ケーシング(12)は、中空の箱状に形成される。言い換えると、ケーシング(12)内には、内部空間(16)が形成される。ケーシング(12)は、上板(12a)と下板(12b)と4つの側板とを有する。4つの側板は、互いに対向する第1側板(12c)と第2側板(12d)を含む。
第1収容部(31)は、ケーシング(12)内における前側に配置される。第1収容部(31)は、点検口(18)の上部に配置される。第1収容部(31)は、発泡スチロールで構成される。第1収容部(31)は、直方体状に形成される。第1収容部(31)は、その上側と下側が開放されている。第1収容部(31)は、仕切部(32)、全熱交換器収容部(33)、およびハウジング部(34)を有する。
第2収容部(41)は、ケーシング(12)内に収容される。第2収容部(41)は、第1収容部(31)の後方に隣接して配置される。第2収容部(41)は、ケーシング(12)内における中央に配置される。第2収容部(41)は、樹脂で構成される。
第3収容部(51)は、ケーシング(12)内に収容される。第3収容部(51)は、第2収容部(41)の後方に隣接して配置される。第3収容部(51)は、ケーシング(12)内における後側に配置される。第3収容部(51)は、発泡スチロールで構成される。
全熱交換器(21)は、本開示の第1熱交換器に対応する。全熱交換器(21)は、第1収容部(31)における全熱交換器収容空間(33a)に配置される。全熱交換器(21)は、給気路(13)を流れる空気と排気路(14)を流れる空気とを熱交換させる。図5において模式的に示すように、全熱交換器(21)の内部には、給気側内部流路(21a)と、排気側内部流路(21b)とが形成される。給気側内部流路(21a)と排気側内部流路(21b)とは、互いに直交する。
換気ユニット(11)は、フィルタ(24)を有する。フィルタ(24)は、第1流路(P1)に配置される。フィルタ(24)は、給気路(13)における全熱交換器(21)の上流側に配置される。フィルタ(24)は、第1収容部(31)における第1流入口(35)と全熱交換器(21)との間に配置される。フィルタ(24)は、室外空気(OA)中の塵埃を捕集する。第4流路(P4)にフィルタを設けてもよい。
給気ファン(22)は、第3流路(P3)に配置される。給気ファン(22)は、第3収容部(51)の内部に収容される。給気ファン(22)は、給気路(13)の空気を搬送する。給気ファン(22)は、シロッコ型である。給気ファン(22)は、ターボ型やプロペラ型であってもよい。
排気ファン(23)は、第2流路(P2)に配置される。排気ファン(23)は、第1収容部(31)におけるファン収容空間(34a)に収容される。排気ファン(23)は、排気路(14)の空気を搬送する。排気ファン(23)は、シロッコ型である。排気ファン(23)は、ターボ型やプロペラ型であってもよい。
利用熱交換器(25)は、本開示の第2熱交換器に対応する。利用熱交換器(25)は、第3流路(P3)に配置される。利用熱交換器(25)は、給気路(13)における全熱交換器(21)の下流側に配置される。利用熱交換器(25)は、第3流路(P3)において、給気側内部流路(21a)と給気ファン(22)との間に配置される。
図4に示すように、換気ユニット(11)は、冷媒管接続部(27)を有する。冷媒管接続部(27)は、本開示の接続部に対応する。冷媒管接続部(27)は、ケーシング(12)の内部空間(16)における第1収容部(31)の右側方に配置される。冷媒管接続部(27)は、利用熱交換器(25)と連絡配管(86,87)とを接続するコネクタである。換気ユニット(11)は、第1冷媒管接続部(27a)および第2冷媒管接続部(27b)を有する。
図5に示すように、ドレンパン(28)は、ケーシング(12)の下板(12b)の上方に配置される。ドレンパン(28)は、ケーシング(12)の下板(12b)の上に載っている。ドレンパン(28)は、利用熱交換器(25)の下方に配置される。ドレンパン(28)は、第2収容部(41)の下方に配置される。ドレンパン(28)は、第2収容部(41)の下側を閉塞する。ドレンパン(28)は、上側が開放された皿状に形成される。ドレンパン(28)は、利用熱交換器(25)の周囲で発生した凝縮水を受ける。
図4に示すように、ポンプ(29)は、第2収容部(41)の内部に配置される。ポンプ(29)は、ドレンパン(28)の上方に配置される。ポンプ(29)は、利用熱交換器(25)の右側方に配置される。言い換えると、ポンプ(29)は、第2収容部(41)の内部空間における右側に配置される。ポンプ(29)は、ドレンパン(28)内の水を排水する。ポンプ(29)は、その下部から水を吸い込む。
図2に示す熱源ユニット(80)は、室外空間(6)に配置される。熱源ユニット(80)は、熱源ファン(81)を有する。熱源ユニット(80)は、冷媒回路(R)の要素として、圧縮機(82)、熱源熱交換器(83)、切換機構(84)および膨張弁(85)を有する。
換気装置(10)の運転動作について図2を参照しながら説明する。換気装置(10)は、冷房運転と暖房運転とを切り換えて行う。図2では、冷房運転時の冷媒の流れを実線矢印で示し、暖房運転時の冷媒の流れを破線矢印で示している。
冷房運転では、圧縮機(82)および熱源ファン(81)が運転し、切換機構(84)が第1状態となり、膨張弁(85)の開度が調節される。加えて、冷房運転では、給気ファン(22)および排気ファン(23)が運転する。
暖房運転では、圧縮機(82)および熱源ファン(81)が運転し、切換機構(84)が第2状態となり、膨張弁(85)の開度が調節される。加えて、暖房運転では、給気ファン(22)および排気ファン(23)が運転する。
利用熱交換器(25)と他の機器の配置関係の詳細について説明する。
全熱交換器(21)と利用熱交換器(25)とは、ケーシング(12)の下面(第1面)である下板(12b)に沿う第1方向に配列される。厳密には、第1方向は、第1側板(12c)と第2側板(12d)とに亘る方向である。第1側板(12c)は、ケーシング(12)のうち外気吸込口(o1)が形成される側面である。第2側板(12d)は、ケーシング(12)のうち給気口(o3)が形成される側面である。本例の第1方向は、水平方向のうち前後方向に対応する。
図5に示すように、排気ファン(23)は、全熱交換器(21)の上面に沿うように配意される。排気ファン(23)は全熱交換器(21)と上下に重なるように配置される。排気ファン(23)は、その第2モータ(M2)の軸が上下を向くように横置きに配置される。これにより、ケーシング(12)を上下方向にコンパクト化できる。
図5および図6において、一点鎖線の矢印Xにて模式的に示すように、本例の給気路(13)は、外気吸込口(o1)、全熱交換器(21)、利用熱交換器(25)、給気ファン(22)、および給気口(o3)に亘って、第1方向に直線状に延びる。全熱交換器(21)の給気側内部流路(21a)は第1方向に延びる。本例の第1方向は前後方向である。これにより、本例の給気路(13)は、外気吸込口(o1)から給気口(o3)に亘って、曲がることがない直線状の流路となる。この結果、長い給気路(13)の圧力損失を低減できる。
図5に示すように、全熱交換器(21)の排気側流入面(21d)は、内気吸込口(o4)に沿う位置にある。ここで、排気側流入面(21d)は、全熱交換器(21)のうち排気側内部流路(21b)の空気が流入する通風面である。排気側流入面(21d)は、全熱交換器(21)の下側の水平な面に対応する。このように、排気側流入面(21d)を内気吸込口(o4)に沿う位置に配置することで、内気吸込口(o4)から排気側流入面(21d)までの上下方向の流路長さを短くできる。この結果、ケーシング(12)を上下方向にコンパクト化できる。
(8-1)全熱交換器(21)は、第1方向である前後方向に見た場合に、利用熱交換器(25)と重なる。これにより、ケーシング(12)の上下の高さを小さくできる。加えて、利用熱交換器(25)に流入する空気の偏流を抑制できる。この結果、利用熱交換器(25)における、空気と冷媒との実質的な伝熱面積を拡大できる。
上記実施形態については以下のような変形例としてもよい。なお、以下の説明では、原則として実施形態と異なる点について説明する。
給気路(13)は、外気吸込口(o1)、全熱交換器(21)、および利用熱交換器(25)に亘って第1方向に直線状に延びるのがよい。この場合には、給気路(13)は、給気口(o3)や給気ファン(22)と第1方向に直線状に重なっていなくてもよい。
上述した実施形態では、全熱交換器(21)の給気側流出面(21c)と、利用熱交換器(25)の流入面(25b)とは、互いに平行な状態で対向してもよい。給気側流出面(21c)と流入面(25b)とは、互いに45°以下の角度をなすように対向すればよい。
上述した実施形態、およびその変形例においては、以下の構成としてもよい。
o3 給気口
o4 内気吸込口
5 室内空間
10 換気装置
12 ケーシング
12b 第1面
13 給気路
14 排気路
21 第1熱交換器
21c 給気側流出面
21d 排気側流入面
22 給気ファン
23 排気ファン
25 第1熱交換器
25 第2熱交換器
25b 流入面
Claims (11)
- 室外空気を室内に供給する給気路(13)と、室内空気を室外に排出する排気路(14)とが形成されるケーシング(12)と、
前記給気路(13)を流れる空気と前記排気路(14)を流れる空気とを熱交換させる第1熱交換器(21)と、
前記給気路(13)における前記第1熱交換器(21)の下流側に配置される第2熱交換器(25)とを備え、
前記第1熱交換器(21)および前記第2熱交換器(25)は、前記ケーシング(12)の下面である第1面(12b)に沿う第1方向に配列され、
前記第1熱交換器(21)は、前記第1方向に見た場合に、前記第2熱交換器(25)と重なる
換気装置。 - 前記第1面(12b)には、前記室内空気を前記排気路(14)に導入するための内気吸込口(o4)が形成され、
前記第1熱交換器(21)は、前記排気路(14)の空気が流入する排気側流入面(21d)を有し、
前記排気側流入面(21d)は、前記内気吸込口(o4)に沿う位置にある
請求項1に記載の換気装置。 - 前記第1熱交換器(21)は、前記給気路(13)の空気が流出する給気側流出面(21c)を有し、
前記第2熱交換器(25)は、空気が流入する流入面(25b)を有し、
前記給気側流出面(21c)が、前記流入面(25b)と対向する
請求項1または2に記載の換気装置。 - 前記給気側流出面(21c)と垂直な第2方向から見た場合に、前記給気側流出面(21c)と前記流入面(25b)とが空間を介して重なる
請求項1~3のいずれか1つに記載の換気装置。 - 前記第2方向から見た場合に、前記給気側流出面(21c)の投影面と前記流入面(25b)の投影面とが重なる面積が、前記給気側流出面(21c)の面積の1/2以上である
請求項4に記載の換気装置。 - 前記第1方向で見た場合に、前記第1熱交換器(21)と前記第2熱交換器(25)とが重なる高さhaが、該第1熱交換器(21)の高さh1の60%以上である
請求項1~5のいずれか1つに記載の換気装置。 - 前記流入面(25b)の面積が、前記給気側流出面(21c)の面積よりも大きい
請求項1~6のいずれか1つに記載の換気装置。 - 前記ケーシング(12)には、前記室外空気を前記給気路(13)に導入するための外気吸込口(o1)が形成され、
前記給気路(13)は、前記外気吸込口(o1)、前記第1熱交換器(21)、および前記第2熱交換器(25)に亘って前記第1方向に直線状に延びる
請求項1~7に記載の換気装置。 - 前記給気路(13)の空気を搬送する給気ファン(22)を備え、
前記給気路(13)は、前記外気吸込口(o1)、前記第1熱交換器(21)、前記第2熱交換器(25)、および前記給気ファン(22)に亘って前記第1方向に直線状に延びる
請求項8に記載の換気装置。 - 前記ケーシング(12)には、前記給気路(13)の空気を室内空間(5)へ供給するための給気口(o3)が形成され、
前記給気路(13)は、前記外気吸込口(o1)、前記第1熱交換器(21)、前記第2熱交換器(25)、給気ファン(22)、および前記給気口(o3)に亘って前記第1方向に直線状に延びる
請求項9に記載の換気装置。 - 前記排気路(14)の空気を搬送する排気ファン(23)を備え、
前記排気ファン(23)は、第1方向で見た場合に、前記第2熱交換器(25)と重なる
請求項1~10のいずれか1つに記載の換気装置。
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JP4617777B2 (ja) * | 2004-08-27 | 2011-01-26 | マックス株式会社 | 換気装置 |
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