WO2023182147A1 - Unité de climatisation de véhicule - Google Patents

Unité de climatisation de véhicule Download PDF

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Publication number
WO2023182147A1
WO2023182147A1 PCT/JP2023/010337 JP2023010337W WO2023182147A1 WO 2023182147 A1 WO2023182147 A1 WO 2023182147A1 JP 2023010337 W JP2023010337 W JP 2023010337W WO 2023182147 A1 WO2023182147 A1 WO 2023182147A1
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WO
WIPO (PCT)
Prior art keywords
air
heater
blown
vehicle
bypass
Prior art date
Application number
PCT/JP2023/010337
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English (en)
Japanese (ja)
Inventor
良徳 戸高
幸央 鈴木
Original Assignee
株式会社ヴァレオジャパン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ヴァレオジャパン filed Critical 株式会社ヴァレオジャパン
Publication of WO2023182147A1 publication Critical patent/WO2023182147A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices

Definitions

  • the present invention relates to a vehicle air conditioning unit that has a vent opening for blowing air toward the upper body of a front seat occupant and a rear opening for blowing air toward a rear seat occupant.
  • Patent Document 1 discloses that vent air ports that blow air toward the upper body of front seat occupants are formed at the center of the vehicle width and at the ends of the vehicle width, and that there is a register that can adjust the amount of air blown to the rear seat area. It is disclosed that the (rear seat ventilation switching section) is provided at a rear ventilation opening that blows air toward rear seat occupants.
  • FIG. 7 shows a vehicle air conditioning unit 120 according to a comparative example.
  • the vehicle air conditioning unit 120 includes a case 140 through which blown air flows from the front to the rear (from the left to the right in the drawing), an evaporator 132 provided inside the case 140 and capable of cooling the blown air, and this evaporator.
  • a heater 133 that can heat the blown air that has passed through the evaporator 132 and a heater 133 that can be slid up and down in the front upper part of the heater 133 and can adjust the ratio of the amount of air that passes through the upper part of the heater 133 out of the air that passes through the evaporator 132.
  • an upper mix door 150 and a lower mix door 160 which is provided in the front lower part of the heater 133 so as to be slidable up and down and can adjust the ratio of the amount of air passing through the lower part of the heater 133 to the air passing through the evaporator 132. , is the main component.
  • the case 140 includes a side vent opening 142 through which air is blown to the upper part of the front seat and the end in the vehicle width direction, and a center vent opening through which air is blown to the upper part of the front seat and the center in the vehicle width direction. 143 and a rear opening 144 through which air is blown to the rear seats.
  • a rear duct 116 through which air from the rear opening 144 can pass is connected to the rear opening 144, and at the downstream end of the rear duct 116 there is a rear seat air blower that can switch whether or not to blow out the air to the rear seats.
  • a switching section 117 is provided.
  • the rear seat ventilation switching section 117 is formed of a louver, and the occupant can adjust the downstream end of the rear duct 116 from fully closed to fully open by sliding the operating section 117a.
  • the following problems occur when the rear seat ventilation switching section 117 is fully closed and the air flow from the rear opening 144 is suddenly stopped by a rear seat occupant. I found out that it occurs. Note that no problem occurred when the rear duct 116 was fully open.
  • FIG. 8 shows the relationship between the blowing air temperature and the mix door position.
  • the vertical axis shows the blown air temperature
  • the horizontal axis shows the mix door position. In the mixed door position, the left end is at full cool and the right end is at full hot.
  • Full cool means a case where the proportion of air passing through the heater 133 out of the air passing through the evaporator 132 is the smallest. In other words, during full cooling, the amount of overlap between the upper and lower mix doors 150, 160 on the heater 133 is greatest.
  • full hot means a case where the proportion of air passing through the heater 133 out of the air passing through the evaporator 132 is the highest. In other words, the amount of overlap between the upper and lower mix doors 150, 160 on the heater 133 is the smallest when the mixer is fully hot. The proportion of air passing through the heater 133 increases from full cool to full hot, and the temperature of the blown air also becomes high.
  • the relationship between the mix door position and the blowout temperature at the side vent opening 142 is shown by a solid line, and the relationship between the mix door position and the blowout temperature at the center vent opening 143 is shown by a broken line.
  • the temperature conditioning mode which mixes both the cold air that has passed only through the evaporator 132 and the warm air that has passed through the heater 133 to create temperature-balanced air
  • the temperature of the air blown out from the center vent opening 143 is T1.
  • the temperature of the air blown out from the side vent opening 142 was T2.
  • the temperature of the air blown from the side vent opening 142 and the temperature of the air blown from the center vent opening 143 be the same.
  • the air blown out from the respective openings 142 and 143 is blown toward the upper body of the front seat occupant, but if the temperatures of the air hitting the front seat occupant are different, the comfort of the occupant will be impaired.
  • An object of the present invention is to provide a vehicle air conditioning unit with improved comfort.
  • a rear duct (16) for blowing air to the rear seat (13) in the vehicle interior (11), and a rear duct (16) provided in the rear duct (16) for blowing out the air to the rear seat (13).
  • a vehicle air conditioning unit (20) that can be installed in a vehicle and is equipped with a rear seat ventilation switching section (17) that can switch whether or not to A case (40), an evaporator (32) provided inside the case (40) and capable of cooling the blown air, a heater (33) capable of heating the blown air that has passed through the evaporator (32), and the heater an upper cold air bypass (By1) which is a flow path formed above the heater (33) and through which the blown air bypassing the heater (33) can pass; and a flow path formed below the heater (33).
  • a lower cold air bypass (By2) through which the air that bypasses the heater (33) can pass, and air that passes through the upper cold air bypass (By1) and air that passes through the upper part of the heater (33).
  • an upper mix door (50) whose ratio with air can be adjusted; and blown air that is slidably disposed between the evaporator (32) and the heater (33) and passes through the lower cold air bypass (By2).
  • a lower mix door (60) that can adjust the ratio of the blown air passing through the lower part of the heater (33) and the upper part of the heater (33) to the blown air passing through the upper cold air bypass (By1).
  • the upper mix space (Mi1) is a space in which the blown air that has passed through is mixed to form upper conditioned air, and the blown air that has passed through the lower cold air bypass (By2) and the lower part of the heater (33).
  • a lower mix space (Mi2) which is a space where the blown air is mixed with lower conditioned air
  • the case (40) includes a side vent opening (42) for supplying the upper conditioned air to the upper part of the front seat (12) in the vehicle interior (11) and the end in the vehicle width direction; a center vent opening (43) provided below the vent opening (42) for supplying the upper conditioned air to the upper part of the front seat (12) and approximately at the center in the vehicle width direction; and the lower conditioned air.
  • the lower mix door (60) includes a rotating shaft section (61) rotatably supported by the case (40), a pinion section (62) provided on the rotating shaft section (61), and a rotating shaft section (62) that is rotatably supported by the case (40).
  • a shutter body (64) that is formed with a rack part (63) that fits with the part (62) and is slidable from the upstream surface of the heater (33) to the lower cold air bypass (By2);
  • An auxiliary adjustment part (65) that can adjust the flow rate of the blown air by adjusting the flow path area of the lower cold air bypass (By2) is formed in the rotation shaft part (61),
  • the auxiliary adjustment section (65) allows both the blast air that has passed through the lower part of the heater (33) and the blast air that has passed through the lower cold air bypass (By2) to flow toward the rear opening (44).
  • a vehicle air conditioning unit is provided in which the flow passage cross-sectional area of the lower cold air bypass (By2) is narrowed.
  • a vehicle air conditioning unit with improved comfort can be provided.
  • FIG. 1 is a schematic diagram of a vehicle equipped with a vehicle air conditioning unit according to an embodiment.
  • FIG. 2 is a perspective view of the vehicle air conditioning unit shown in FIG. 1.
  • FIG. 3 is a sectional view taken along line 3-3 in FIG. 2.
  • FIG. FIG. 4 is a perspective view of the lower mix door shown in FIG. 3;
  • FIG. 3 is an explanatory diagram of the operation of the vehicle air conditioning unit in the mixed mode.
  • FIG. 3 is an explanatory diagram of the operation of the vehicle air conditioning unit in full cool mode.
  • FIG. 3 is a diagram illustrating the relationship between the blown air temperature and the mix door position in the vehicle air conditioning unit shown in FIG. 2.
  • FIG. 7 is a diagram illustrating the relationship between the temperature
  • Fr indicates the front with respect to the vehicle traveling direction
  • Rr indicates the rear with the vehicle traveling direction as a reference
  • Le is the left as seen from the passenger
  • Ri is the right as seen from the passenger
  • Up is the top
  • Dn is the bottom.
  • FIG. 1 shows a vehicle 10 on which a vehicle air conditioning unit 20 is mounted.
  • the vehicle 10 is, for example, a passenger car, and has left and right front seats 12, 12 provided at the front inside the vehicle interior 11, and a seat provided behind these front seats 12, 12 across both ends in the vehicle width direction. It has a rear seat 13.
  • the vehicle air conditioning unit 20 is provided in front of the front seats 12, 12, and is used to blow air adjusted to a predetermined temperature to the occupants of the front seats 12, 12 and the rear seat 13.
  • front external ventilation switching parts 14, 14 are formed in front of the front seat 12 and on the outside in the vehicle width direction, and are capable of switching whether or not to blow out the blown air.
  • front middle ventilation switching parts 15, 15 are formed that can switch whether or not to blow out the blown air.
  • a rear duct 16 extending toward the rear seat 13 is connected to the vehicle air conditioning unit 20, and air can be blown to the rear seat 13 via the rear duct 16.
  • rear seat ventilation switching parts 17, 17 are provided that can switch whether or not to blow air to the rear seat 13.
  • the rear duct 16 can be arranged, for example, to extend rearward along the lower surface of the center console and upward along the rear surface of the center console. Alternatively, it may pass under the floor of the vehicle interior and stand up along the B pillar. Alternatively, it may be arranged such that it branches in the middle and can blow air to the upper and lower bodies of the rear seat occupant.
  • Each of the air blowing switching parts 14, 15, and 17 is constituted by a louver, and an occupant can switch the air blowing amount from fully open to fully closed by swinging the operating parts 14a, 15a, and 17a.
  • the vehicle air conditioning unit 20 includes a blower section 21 that can take in and blow air from inside the vehicle and/or outside the vehicle, and a temperature control section that can adjust the blown air sent from the blower section 21 to a predetermined temperature. 30.
  • the blowing section 21 can adopt a well-known configuration, and includes a built-in blower fan, for example.
  • the temperature control unit 30 includes a case 40 into which the air from the blower unit 21 (see FIG. 2) is flowed, an evaporator 32 that is provided inside the case 40 and is capable of cooling the air, and a case 40 in which the air from the blower unit 21 (see FIG. 2) is sent.
  • a heater 33 capable of heating air; an upper mix door 50 provided in front of the upper part of the heater 33 and capable of adjusting the amount of air passing through the heater 33; and an upper mix door 50 provided in front of the lower part of the heater 33 and allowing air to pass through the heater 33.
  • the main component is a lower mix door 60 whose amount can be adjusted.
  • the case 40 includes a defroster opening 41 through which air is blown out to blow air toward the windshield, and a front external ventilation switching section 14 (in the passenger compartment 1 a side vent opening 42 for supplying the upper side conditioned air to the upper part of the front seat 12 (the upper part and the end in the vehicle width direction); A center vent opening 43 for supplying lower conditioned air to the upper part of the front seat 12 (approximately the center in the vehicle width direction) and a rear opening 44 for supplying lower conditioned air to the rear seat 13 via the rear duct 16 are formed. has been done.
  • the case 40 has foot openings 45, 45 formed on its left side and right side for supplying lower conditioned air below the front seats 12, 12.
  • the foot openings 45, 45 are not shown in FIG. 3 because they are formed on the right side and left side of the case 40.
  • the rear opening 44 is preferably formed below the case 40 and at the center in the left-right direction.
  • connection can be facilitated.
  • Air volume adjustment doors 36 to 39 are provided in the vicinity of each of the openings 41 to 44 so as to be swingable, and the amount of air blown out can be adjusted by adjusting the degree of opening of the openings 41 to 44. There is. Although not shown, an air volume adjustment door is also provided near the foot openings 45, 45.
  • case 40 is divided into left and right rooms by a partition wall (not shown). Openings 41 to 44 and air volume adjustment doors 36 to 39 are formed in each of the left and right rooms. The same applies to the foot opening 45 and the air volume adjustment door for the foot opening 45.
  • One evaporator 32 is provided so as to be substantially orthogonal to the direction in which air flows (from left to right in the drawing).
  • a refrigerant flows through the evaporator 32, and the air passing through the evaporator 32 is cooled by heat exchange with the refrigerant.
  • Blow air from the blower section 21 is taken into the case 40 from the front of the evaporator 32, is bent approximately 90 degrees, and passes through the evaporator 32.
  • a hot water heater through which hot water is flowed an electric heater that generates heat when energized, or a refrigerant radiator through which a refrigerant is flowed can be used. Moreover, these can also be used in combination.
  • the upper mix door 50 includes an upper rotating shaft section 51 rotatably supported by the case 40, an upper pinion section 52 provided on the upper rotating shaft section 51, and an upper rotating shaft section 51 that fits into the upper pinion section 52.
  • the upper shutter body 54 is slidable from the upstream side of the heater 33 to the upper cold air bypass By1 by rotation of the upper shutter body 54.
  • the upper mix door 50 can adjust the ratio of the blown air that passes through the upper cold air bypass By1 and the blown air that passes through the upper part of the heater 33, depending on the amount of overlap of the upper shutter body 54 with the heater 33.
  • the lower mix door 60 is slidably disposed between the evaporator 32 and the heater 33, and can adjust the ratio of the blown air that passes through the lower cold air bypass By2 and the blown air that passes through the lower part of the heater 33. .
  • the lower mix door 60 includes a lower rotating shaft portion 61 (rotating shaft portion 61) rotatably supported by the case 40, and a lower pinion portion 62 (pinion portion 62) provided on the lower rotating shaft portion 61. and a lower shutter body 64 (shutter body 64) in which a lower rack part 63 (rack part 63) that fits with the lower pinion part 62 is formed and is slidable from the upstream of the heater 33 to the lower cold air bypass By2. ,have.
  • the lower rotating shaft portion 61 is formed with an auxiliary adjustment portion 65 that can adjust the flow rate of the blown air by adjusting the flow path area of the lower cold air bypass By2.
  • the auxiliary adjustment section 65 is constituted by a plate-shaped member extending in the radial direction from the center of the lower rotating shaft section 61.
  • the auxiliary adjustment portion 65 is located overlapping the rear opening 44 with respect to the position in the vehicle width direction and the vertical direction. Further, the auxiliary adjustment portion 65 is located overlapping the center vent opening 43 with respect to the vehicle width direction.
  • the lower shutter body 64 partially overlaps the heater 33 and partially blocks the lower cold air bypass By2. At this time, part of the blown air that has passed through the evaporator 32 passes through the lower part of the heater 33, and part of it passes through the lower cold air bypass By2. In such a case, the auxiliary adjustment section 65 narrows the flow path cross-sectional area of the lower cold air bypass By2. In other words, the auxiliary adjustment unit 65 adjusts the lower cold air bypass By2 when both the air that has passed through the lower part of the heater 33 and the air that has passed through the lower cold air bypass By2 flow toward the rear opening 44. It is provided in the lower rotating shaft portion 61 so as to narrow the cross-sectional area of the flow path.
  • the auxiliary adjustment unit 65 disconnects the flow path of the lower cold air bypass By2. Reduce area. As a result, the flow rate of the blast air passing through the lower cold air bypass By2 decreases. Since the flow rate of the blown air passing through the lower cold air bypass By2 is small, the flow rate of hot air required to adjust the temperature to a predetermined temperature is also small. That is, the flow rate of the blown air passing through the lower part of the heater 33 is also small. Relatively, the flow rate of the blast air passing through the upper cold air bypass By1 and the flow rate of air passing through the upper part of the heater 33 increase.
  • the present inventors closed the rear seat ventilation switching section 17 (see FIG. 3) and calculated the difference between the temperature of the air blown out from the side vent opening 42 and the temperature of the air blown out from the center vent opening 43. I measured it.
  • FIG. 6 shows the relationship between the blowing air temperature and the mix door position.
  • the vertical axis shows the blown air temperature
  • the horizontal axis shows the mix door position. In the mixed door position, the left end is at full cool and the right end is at full hot.
  • the difference (T4-T3) between the temperature T3 of the blown air when the flow path area is narrowed by the auxiliary adjustment unit 65 (see FIG. 5A) and the temperature T4 of the blown air is the difference between the temperature of the blown air when the auxiliary adjustment unit 65 (see FIG. 5A) is not used.
  • the difference was smaller than the difference between the air temperature T1 and the blown air temperature T2 (T2-T1). In other words, (T4-T3) ⁇ (T2-T1).
  • the value of T4-T3 was a sufficiently tolerable difference that did not cause discomfort to the occupants.
  • FIG. 5B shows the vehicle air conditioning unit 20 in full cool mode.
  • the upper and lower rotating shaft parts 51 and 61 rotate, and the upper and lower shutter bodies 54 and 64 slide to substantially cover the front surface of the heater 33.
  • the auxiliary adjustment portion 65 is oriented in the direction along the flow of the blown air. That is, the auxiliary adjustment unit 65 maximizes the flow path cross-sectional area of the lower cold air bypass By2 in the full cool mode in which the amount of blown air passing through the lower part of the heater 33 is the smallest.
  • the difference between the flow rate of cold air passing through the upper cold air bypass By1 and the flow rate of cold air passing through the lower cold air bypass By2 is the smallest.
  • the auxiliary adjustment section 65 may be oriented in any direction.
  • the vehicle air conditioning unit 20 described above has the following effects.
  • the cold air that has passed through the lower cold air bypass By2 flows along the rear wall of the case 40, and is formed downstream of the side vent opening 142 when viewed along the flow direction of the lower conditioned air. It is thought that more air is blown out from the center vent opening 143. In comparison, more of the warm air that has passed through the lower part of the heater 133 is blown out from the side vent opening 142. As a result, it is considered that the difference between the temperature T2 of the conditioned air blown out from the side vent opening 142 and the temperature T1 of the conditioned air blown out from the center vent opening 143 exceeds the predetermined value.
  • the lower cold air bypass By2 is By reducing the opening degree, the amount of air blown into the lower mix space Mi2 in this temperature range can be reduced.
  • the amount of cold air flowing into the center vent opening 43 can be reduced even if the flow path of the rear duct 16 is closed by the rear seat air switching section 17.
  • the amount of hot air flowing into the side vent opening 42 can be reduced.
  • a vehicle air conditioning unit 20 with improved comfort can be provided.
  • the auxiliary adjustment unit 65 maximizes the flow passage cross-sectional area of the lower cold air bypass By2 in the full cool mode. Normally, in the case of full cool mode, it is necessary to rapidly cool the interior of the vehicle interior 11 (see FIG. 1). By supplying blast air to the entire vehicle interior 11 in a situation where rapid cooling is required, the entire vehicle interior 11 can be quickly cooled. In addition, in the full cool mode, since the flow rate of the blown air that passes through the heater 33 is small (or does not pass through it), there is a problem that the temperature of the air blown out at the center vent opening 43 and the side vent opening 42 is different. It doesn't occur in the first place.
  • the auxiliary adjustment section 65 is located overlapping the rear opening 44 when viewed along the flow direction of the lower conditioned air. Even when the rear seat ventilation switching section 17 is suddenly closed, the flow rate of the blast air passing through the lower cold air bypass By2 is reduced in advance, so that the air is blown out from the side vent opening 42 and the center vent opening 43. The influence of the temperature of the conditioned air can be suppressed. The comfort inside the vehicle can be further improved.
  • the auxiliary adjustment section 65 is located overlapping the center vent opening 43 when viewed along the flow direction of the lower conditioned air. Even when the rear seat ventilation switching section 17 is suddenly blocked, the flow rate of the blast air passing through the lower cold air bypass By2 is reduced in advance, so that air is blown out from the center vent opening 43 and the side vent opening 42. The influence of the temperature of the conditioned air can be suppressed. Comfort within the vehicle interior 11 can be further improved.
  • vehicle air conditioning unit according to the present invention has been described using an example in which the case is divided into left and right rooms, it is also applicable to a vehicle air conditioning unit that is not divided into left and right rooms.
  • a guide member in the upper mix space Mi1 to guide the blown air to the side vent opening 42 and the center vent opening 43.
  • the upper mix door 50 has been described as having the slidable upper shutter body 54, it may be configured with a well-known cantilever door or butterfly door.
  • the form of the upper mix door 50 is not limited as long as the ratio of the blown air passing through the upper cold air bypass By1 and the blown air passing through the upper part of the heater 33 can be adjusted.
  • the present invention is not limited to the examples as long as the functions and effects of the present invention are achieved.
  • the vehicle air conditioning unit of the present invention is suitable for being mounted on a passenger vehicle.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

[Problème] Fournir une unité de climatisation de véhicule ayant un confort amélioré. [Solution] Dans une unité de climatisation de véhicule (20), une unité de réglage auxiliaire (65) permettant de régler un débit d'air soufflé par régulation d'une zone de passage d'écoulement d'une dérivation d'air froid inférieure (By2) est formée sur une partie d'arbre rotatif (61) d'une porte de mélange inférieure (60). L'unité de réglage auxiliaire (65) réduit une surface de section transversale de passage d'écoulement de la dérivation d'air froid inférieure (By2) lorsque de l'air soufflé qui a traversé une partie inférieure d'un dispositif de chauffage (33) et de l'air soufflé qui a traversé la dérivation d'air froid inférieure (By2) s'écoule à la fois vers une partie d'ouverture arrière (44). De préférence, une partie d'ouverture d'évent centrale (43) est disposée sur un côté aval d'une partie d'ouverture d'évent latéral (42) telle que vue le long d'une direction d'écoulement d'air conditionné inférieur.
PCT/JP2023/010337 2022-03-22 2023-03-16 Unité de climatisation de véhicule WO2023182147A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022044902A JP2023139394A (ja) 2022-03-22 2022-03-22 車両用空調ユニット
JP2022-044902 2022-03-22

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WO2023182147A1 true WO2023182147A1 (fr) 2023-09-28

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09175147A (ja) * 1995-12-21 1997-07-08 Zexel Corp 車両用空調装置
JP2017074827A (ja) * 2015-10-14 2017-04-20 株式会社ヴァレオジャパン 車両用空調ユニット
US20190092126A1 (en) * 2017-09-28 2019-03-28 Denso International America, Inc. Rotary shaft assembly with nested shaft
JP2021017066A (ja) * 2019-07-17 2021-02-15 株式会社ヴァレオジャパン 車両用エアコン装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09175147A (ja) * 1995-12-21 1997-07-08 Zexel Corp 車両用空調装置
JP2017074827A (ja) * 2015-10-14 2017-04-20 株式会社ヴァレオジャパン 車両用空調ユニット
US20190092126A1 (en) * 2017-09-28 2019-03-28 Denso International America, Inc. Rotary shaft assembly with nested shaft
JP2021017066A (ja) * 2019-07-17 2021-02-15 株式会社ヴァレオジャパン 車両用エアコン装置

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