JP3699613B2 - Air conditioner for vehicles - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle air conditioner in which a cooler (for example, an evaporator) and a heater (for example, a heater core) are disposed in a case.
[0002]
[Prior art]
FIG. 9 of Japanese Patent Application Laid-Open No. 8-58351 shows a heater core that reheats the air cooled by the evaporator, a door that controls the ratio of guiding the air cooled by the evaporator to the heater core, and the air controlled by this door. There is disclosed a vehicle air conditioner provided with a plurality of air outlet doors that guide the air to a differential air outlet, a vent air outlet, and a foot air outlet at a predetermined air distribution ratio.
[0003]
[Problems to be solved by the invention]
Such conventional air conditioning has the following problems.
(1) Except during extremely cold full hot or severe full heat, the cooling air that is not reheated by the heater core and the reheated air that is reheated by the heater core are mixed to generate temperature-controlled air at an appropriate temperature. It is necessary to blow wind from each outlet. However, in the above-described prior art air conditioner, there is a possibility that cooling air that is not mixed with the reheating air is blown out from the differential air outlet, or reheating air that is not mixed with the cooling air is blown out from the foot air outlet.
(2) When reheated air of the same temperature is sent from the foot outlet opening toward the front seat foot and the rear seat foot, the length of the duct to the outlet becomes inevitably longer. The temperature of the reheated air is lower than the temperature of the reheated air blown out from the air outlet of the front seat foot with a short outlet, and the rear seat is less likely to be warmed compared to the feet of the front seat. turn into.
[0004]
It is an object of the present invention to sufficiently mix uncooled cooling air and reheat air reheated by the heater core, and to blow reheat air warmer than the front seat foot to the rear seat foot. It is providing the vehicle air conditioner.
[0005]
[Means for Solving the Problems]
The present invention will be described with reference to FIG. 1 of one embodiment.
(1) The invention of claim 1 is provided with a first chamber R1 provided with an air introduction opening 113, in which a cooler 12 for cooling the air introduced from the air introduction opening 113 is accommodated, and the first chamber R1. The first chamber R1 is arranged in parallel to the rear of the vehicle across the first partition wall 116, the second chamber R2 in which the heater 13 for reheating the cooling air cooled by the cooler 12 is accommodated, and the first chamber R1 The first door 14 that controls the ratio of the cooling air that is reheated by the heater 13 according to the vehicle thermal load with respect to the cooling air that flows from the chamber R1 to the second chamber R2, and the duct 20 to the vent outlet 4B Is applied to a vehicle air conditioner having a vent blowing opening VA, a defrost blowing opening DA, and a front seat foot blowing opening 114 for a front seat occupant. The above object is achieved by the following configuration. That is, a partition wall 119 is formed in the second chamber R2 so as to extend in a direction perpendicular to the direction of cooling air passing through the first door 14, and the second chamber R2 is located behind the partition wall 119 in the vehicle. A third chamber R3 having a vent blowing opening VA, a front seat foot blowing opening 114, and a rear seat foot blowing opening 115 for a rear seat occupant is provided, and the partition wall 119 includes (a ) Opening and closing the opening 119a and the opening 119a for guiding the non-reheated cooling air passing through the first door 14 across the second chamber R2 to the third chamber R3, and opening at least during full cooling . And (b) a rear seat foot bypass opening for bypassing air immediately after being heated by the heater 13 to the rear seat foot blowing opening 115 at a portion facing the heater 13. 1 8a and a bypass door 18 for opening and closing the opening 118a are provided, and a mixing space M1 in which the reheating air reheated by the heater 13 and the cooling air are mixed is formed above the second chamber R2. The defrost blowing opening DA is formed in the upper end portion 111a of the second chamber R2.
(2) According to the invention of claim 2, the first door 14, the second door 15, the vent blowing opening VA and the vent blowing outlet 4B are arranged in a substantially straight line.
[0006]
【The invention's effect】
(1) According to the present invention, a partition wall having an opening is provided in the second chamber, while a second door that opens and closes the opening is provided, and the cooler 12 is discharged when the second door is closed. A space for mixing the cooling air and the reheating air discharged from the heater 13 is formed in the upper portion of the second chamber. When the second door is open, the cooling air passing through the first door is the second air. Since the vehicle is guided to the third chamber across the opening through the opening, even when the cooler and the heater are arranged in parallel in the vehicle front-rear direction, for example, the first door is fully cool. When in the middle of the full hot, the cooling air and the reheating air can be sufficiently mixed in the mixing space, and in the case of full cool, it flows through the case without reheating and flows to the vent outlet. The pressure loss of the cooling air can be reduced. Further, according to the present invention, the rear seat foot bypass opening for bypassing the air immediately after being heated by the heater to the rear seat foot blowing opening at the portion facing the heater, and the bypass door for opening and closing the opening Therefore, the air immediately after being reheated by the heater can be bypassed to the opening for blowing out the rear seat foot, and reheating air warmer than the front seat foot can be blown out to the rear seat foot.
(2) According to the invention described in claim 2, since the first door, the second door, the vent outlet opening, and the vent outlet are arranged in a substantially straight line, cooling in the vent outlet mode is performed. Wind pressure loss can be further reduced.
[0007]
In the section of the means for solving the above problems, the reference numerals used in the drawings of the embodiment are used, but the present invention is not limited to the embodiment.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a vehicle air conditioner according to the present invention will be described with reference to FIGS. FIG. 1 is a longitudinal sectional view of a center console portion at the center of the vehicle. The engine room 1 and the vehicle compartment 2 are partitioned by a partition wall 3. A center console panel 4 projects from the vehicle compartment 2 at the center of the vehicle, and an air conditioner housing space 5 is formed therein.
[0009]
An air conditioner 10 is accommodated in the accommodating space 5. The air conditioner 10 has a case 11 provided with a first chamber R1 and a second chamber R2 arranged in parallel in the vehicle front-rear direction with a partition wall 116 from the first chamber R1. As shown in FIG. 2, the upper wall 111 of the case 11 includes an upper end portion 111a and an inclined portion 111b inclined downward from the upper end portion 111a toward the vehicle rear side. A defrost blowing opening DA is formed in the upper end portion 111a, and a vent blowing opening VA is formed in the inclined portion 111b. An air introduction port 113 is formed on the left side wall 112 (in FIG. 2) of the case 11, and front seat foot outlet ducts 114 project from the left and right side walls 112. A rear seat foot blowing duct 115 is formed in the front part of the case, and a rear seat foot blowing adapter AD is connected to the duct 115 so that temperature-controlled air is blown to the rear seat.
[0010]
In FIG. 1, a first chamber R <b> 1 is formed between the case rear wall 117 and the partition wall 116 in the case 11, and a second chamber R <b> 2 is formed between the front wall 118 and the partition wall 116. . The evaporator 12 that cools the air introduced into the case 11 from the air introduction port 113 is disposed in the first chamber R1 so as to be inclined forward of the vehicle. The heater core 13 that reheats the cooled air is disposed perpendicularly to the bottom 12L of the second chamber R2, and the air that has passed through the heater core 13 is guided by the inner surface of the front wall 118 of the case 11 and moved upwardly of the case 11. Led. A partition wall 119 is provided in the upper part of the second chamber R2 so as to face the partition wall 116 so as to continue to the front wall 118 in FIG. 1, and is formed between the partition wall 116 and the partition wall 119. The room upper space becomes the mixed space M1.
[0011]
The partition wall 116 is provided with openings 116 a and 116 b communicating with the first chamber R 1 and the second chamber R 2, and the openings 116 a and 116 b are opened and closed by the slide door 14. The slide door 14 is a door that controls the ratio of the air cooled by the evaporator 12 to the heater core 13 according to the vehicle thermal load.
[0012]
The partition wall 119 is formed so as to extend in a direction orthogonal to the blowing direction of the cooling air that passes through the slide door 14, and a third chamber R3 that communicates with the second chamber R2 is provided behind the partition wall 119 in the vehicle. It has been. An opening 119a is formed in the partition wall 119, and the rotary door 15 is provided in the opening 119a. The opening 119a is formed at a position such that the cooling air discharged from the opening 116a that is fully opened at the time of full cooling is guided to the third chamber R3 across the second chamber R2.
[0013]
The rear seat foot bypass opening 118a is formed in a portion of the front wall 118 facing the heater 13, and a bypass door 18 for opening and closing the rear seat foot bypass opening 118a is provided. The bypass door 18 is opened from the position where the opening 118a is fully closed to the rear seat foot blowing duct 115 side. The opening degree of the bypass door 18 is appropriately controlled according to the priority of the rear seat heating. The opening degree is maximized when the priority of the rear seat heating is the maximum, and the opening degree when the priority of the rear seat heating is the minimum. Is minimal. In the foot mode, the air after being mixed with the cooling air in the mixing space M1 is guided to the front seat foot outlet duct 114, and when the bypass door 18 is opened, the warm air before being mixed with the cooling air in the mixing space M1. Air is led from the second chamber R2 to the rear seat foot blowing duct 115, and air warmer than the air led to the front seat foot blowing duct 114 blows out to the rear seat foot. Here, since the bypass door 18 is opened to the rear seat foot blowing duct 115 side, when the bypass door 18 is opened, the air after being mixed with the cooling air in the mixing space M1 in the rear seat foot blowing duct 115. The flow passage of the air is narrowed and the amount of air passing therethrough is reduced. However, warm air flows from the second chamber R2 into the rear seat foot blowing duct 115 so as to compensate for the reduced air flow rate. For this reason, the amount of air blown to the rear seat foot is kept substantially constant regardless of the opening degree of the bypass door 18.
[0014]
A defrost door 16 is provided in the defrost blowing opening DA, and a vent door 17 is provided in the vent blowing opening VA. As shown in FIG. 1, the vent door 17 also serves as a foot door that opens and closes the front seat foot outlet duct 114 to reduce the number of components. A defrost air duct 19 is connected to the defrost outlet opening DA, and the other end of the defrost air duct 19 is connected to a defrost outlet 4 A installed on the dashboard of the center console panel 4. A vent air duct 20 is connected to the vent air outlet VA, and the other end of the vent air duct 20 is connected to the vent air outlet 4B of the center console panel 4.
[0015]
The slide door 14 is switched to a full cool position during extreme heat, a full hot position during extreme cold, and an arbitrary intermediate position between the full cool position and the full hot position. At the full cool position, the opening 116a is fully opened and the opening 116b is fully closed, and the entire amount of air cooled by the evaporator 12 is sent to the mixing space M1 without being reheated by the heater core 13. At the full hot position, the opening 116a is fully closed and the opening 116b is fully opened, and the entire amount of air cooled by the evaporator 12 is reheated by the heater core 13 and sent out to the mixing space M1 and the third chamber R3. When the sliding door 14 is in an intermediate position between them, a part of the air cooled by the evaporator 12 passing through the opening 116b is reheated by the heater core 13, and in the mixing space M1 and the third chamber R3 described later, It is mixed with cold air passing through the opening 116a to generate air of appropriate temperature.
[0016]
The revolving door 15 is opened at least when fully cool and closed when fully hot.
Therefore, at least when the slide door 14 is in the full cool position, the cooling air passing through the opening 116a traverses the second chamber R2 or the mixing space M1 from the opening 119a to the third chamber R3, and hence the vent outlet 4B. Led to. In addition, the air controlled by the slide door 14 is transferred to the defrost blowing opening DA, the vent blowing opening VA, the front seat foot blowing duct 114, and the rear seat foot blowing duct 115 by the rotary door 15. Guided by wind ratio.
[0017]
The temperature control operation of the vehicle air conditioner configured as described above will be described in more detail.
(1) At the time of full cooling in the vent mode At the time of full cooling in the vent mode, the rotary door 15, the defrost door 16 and the vent door 17 are respectively switched to the solid line positions, and the slide door 14 is driven to the lowermost position, and the opening 116a. The air cooled by the evaporator 12 passing through is not reheated by the heater core 13 and is blown out only from the vent outlet 4B. In other words, when the slide door 14 is at the full cool position, the cold air cooled by the evaporator 12 is directly guided to the third chamber R3 across the second chamber R2 or the mixing space M1. At this time, the bypass door 18 is fully closed.
[0018]
(2) When the defrost mode is full hot When the defrost mode is full hot, the rotary door 15, the defrost door 16 and the vent door 17 are respectively switched to the positions of the two-dot chain lines, and the slide door 14 is driven to the uppermost position. The air cooled by the evaporator 12 that passes through the opening 116b is reheated by the heater core 13 to become an appropriate temperature and blown out from the defrost outlet 4A. At this time, the bypass door 18 is fully closed.
(3) When the slide door 14 is in the intermediate position between the full hot and the full cool in the middle of the defrost mode between the full hot and the full cool, the heater core passes through the air cooled by the evaporator 12 and the opening 116b. The air reheated at 13 is mixed in the mixing space M1 and blown out from the differential outlet 4A. At this time, the bypass door 18 is fully closed.
[0019]
(4) At the time of foot mode When the slide door 14 is in the intermediate position between full hot and full cool in the foot mode, the air cooled by the evaporator 12 passing through the opening 116a and the heater core 13 is reheated through the opening 116b. The mixed air is mixed in the mixing space M1 and the third chamber R3 and blown out from the foot outlet. Further, as described above, the opening degree of the bypass door 18 is appropriately controlled according to the priority of the rear seat heating, and the opening degree is maximized when the priority of the rear seat heating is the maximum. When is minimum, the opening is minimum.
[0020]
As described above, in the present embodiment, the evaporator 12 is inclined forward of the vehicle in order to provide the inclined portion 111b at the upper vehicle rear corner of the air conditioner 10. However, in the present embodiment, the mixed space is also provided. In order to make the volume of M1 sufficient, the width dimension of the heater core 13 is lengthened and the height dimension is lowered, and the heater core 13 is disposed on the case bottom surface 12L below the evaporator 12. As a result, the rear volume of the vehicle can be made larger than that of the evaporator 12, and the partition wall 119 passes the cold air discharged from the evaporator 12 through the opening 116a and the temperature reheated by the heater core 13 through the opening 116b. A sufficient mixing space M1 for mixing with the wind can be secured.
[0021]
Further, in the present embodiment, the opening 116a and the vent blowing opening VA are in a positional relationship that substantially faces each other through the opening 119a. As a result, when the vent mode is fully cooled, as shown in FIG. 1, the cold air discharged from the evaporator 12 is guided to the vent blowing opening VA without passing through the tortuous path serving as a resistance. The passage length to the outlet 4B is shortened, and the pressure loss can be reduced. As a result, a large flow of cool air can be discharged even at a low fan voltage, power consumption can be suppressed, and a larger amount of cool air can be blown into the passenger compartment even with a fan voltage similar to the conventional one. improves.
[0022]
In FIG. 1, reference numeral SM denotes a steering member, and both left and right ends of the steering member SM are fixed to a dash side panel 32 integrated with the A pillar 31 as shown in FIG. 3. In the present embodiment, an inclined portion 111b is provided at the rear of the vehicle at the top of the air conditioner 10, and the steering member SM is allowed to pass through a triangular area indicated by T in FIG. As a result, the steering member SM can be made linear, and it is not necessary to increase the shaft diameter, thereby preventing an increase in weight and cost. In addition, space efficiency can be improved. For example, when the steering member SM is not located in the region T, the region T may be a space for storing another device, for example, a pop-up type liquid crystal device inside the dashboard. Even if the steering member SM exists, other devices can coexist as long as they do not interfere with the steering member SM.
[0023]
In the present embodiment, since the vent blow opening VA is provided on the inclined surface 111b, the height of the vent blow opening 4B on the center center console panel 4 is higher than that of a conventional air conditioner having a substantially rectangular cross-sectional area. The degree of freedom of the arrangement is improved.
[0024]
The present invention can also be applied to an air conditioner that uses another cooler equivalent to the evaporator 12 or another heater equivalent to the heater core 13. The sliding door is not limited to the embodiment, and may be a rotary door.
[0025]
Correspondences between the constituent elements of the claims and the constituent elements of the embodiment are as follows. The evaporator 12 is a cooler, the heater core 13 is a heater, the partition 116 is a first partition, the partition wall 119 is a second partition, the sliding door 14 is a first door, and the rotary door 15 is a second. Corresponding to each door.
[Brief description of the drawings]
1 is a longitudinal sectional view showing a vehicle air conditioner mounted on a vehicle according to the present invention. FIG. 2 is an external perspective view of the vehicle air conditioner according to the present invention. FIG. 3 is a perspective view showing a steering member. ]
DESCRIPTION OF SYMBOLS 10: Air conditioner 11: Case 12: Evaporator 13: Heater core 14: Slide door 15: Revolving door 16: Defrost door 17: Vent door 111b: Inclined part 116: Partition 116a, 116b: Opening 119: Partition wall 119a: Opening DA: Defrost blowing opening VA: Vent blowing opening SM: Steering member R1: First chamber R2: Second chamber R3: Third chamber M1: Mixing space

Claims (2)

A first chamber provided with an air introduction opening and containing a cooler for cooling the air introduced from the air introduction opening;
A second chamber in which a heater for reheating the cooling air cooled by the cooler is accommodated in parallel with the first partition across the first partition;
A first door that controls a ratio of cooling air to be reheated by the heater according to a vehicle thermal load with respect to the cooling air flowing from the first chamber to the second chamber;
A vent outlet opening communicating with the vent outlet via a duct;
An opening for defrost blowing,
In a vehicle air conditioner having a front seat foot opening for a front passenger,
In the second chamber, a partition wall is formed that extends in a direction perpendicular to the blowing direction of the cooling air passing through the first door,
A third chamber having a vent blowing opening, a front seat foot blowing opening, and a rear seat foot blowing opening for a rear seat occupant while communicating with the second chamber on the rear side of the partition wall. Is provided,
The partition wall includes: (a) an opening for guiding the non-reheated cooling air passing through the first door across the second chamber to the third chamber, and opening and closing the opening ; A second door that is opened at the time of cooling ; and (b) a rear portion for bypassing the air immediately after being heated by the heater to the rear seat foot blowing opening at a portion facing the heater. A seat foot bypass opening and a bypass door for opening and closing the opening are provided,
A mixing space in which the reheating air reheated by the heater and the cooling air are mixed is formed above the second chamber, and the defrost blowing opening is formed at the upper end of the second chamber. A vehicle air conditioner is formed.   The vehicle air conditioner according to claim 1, wherein the first door, the second door, the vent outlet opening, and the vent outlet are arranged in a substantially straight line.

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