JP2004268712A - Air-conditioning device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioning device for a vehicle, which can increase the heating at the time of a full hot mode in a structure wherein a by-pass passage and a hot air passage are compactly constituted while maintaining the cold air maximum blow out performance. <P>SOLUTION: The by-pass passage 13 is formed into an approximately linear shape, and in the meantime, a rear stream part 12B of the hot air passage 12 is curved to the by-pass passage 13 side, and thus, the by-pass passage 13 and the hot air passage 12 are formed into a compact structure while ensuring the cold air maximum blow out performance. In the structure, a flow control projection 33 is provided at a location interfering the by-pass passage side end part 7u of a heater core 7 on the upstream part 12A of the hot air passage 12. When the hot air passage entrance 12 is totally opened by the air mixing door 62, the air which tends to be inclined to the by-pass passage side 7u of the heater core 7 is diffused to the central side of the heater core 7 by the projection 33, and the total ventilation surface of the heater core 7 can effectively be utilized. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle air conditioner.
[0002]
[Prior art]
FIG. 5 shows a conventional vehicle air conditioner. The conventional vehicle air conditioner includes an evaporator 5, a heater core 7, and an air mixing door 62 in an air conditioning case 2, and mixes hot air that has passed through the heater core 7 and cool air that has bypassed the heater core 7 in an air mixing chamber 14. And blows out from the outlets 9, 10, 11 into the vehicle interior. The blowout temperature of the conditioned air is determined by the distribution control of the amount of warm air and the amount of cool air by the air mix door 62. Reference numerals 21, 22, and 23 are doors for selectively opening and closing the outlets 9, 10, and 11.
[0003]
In this type of vehicle air conditioner, the inlet 65 of the warm air passage 12 and the inlet 66 of the bypass passage 13 are arranged in parallel, the bypass passage 13 is formed substantially linearly, The portion 12B is formed to be curved on the bypass path 13 side. Thereby, the bypass passage 13 and the hot air passage 12 are configured to be compact while the maximum blowing performance of the cold air is ensured, so that the entire apparatus can be downsized (for example, see Patent Document 1).
[0004]
[Patent Document 1]
Japanese Patent Application Laid-Open No. Hei 10-217779
[Problems to be solved by the invention]
However, in the conventional vehicle air conditioner, in the full hot mode (temperature control mode in which the hot air passage 12 in which the bypass passage 13 is fully closed and the hot air passage 12 is fully opened) as shown in FIG. The wind tends to contract at the end 7u. That is, at the time of full hot, the wind tends to be biased toward the in-corner side path of the hot air passage 12 curved to the bypass passage 13 side, so that the heater core 7 cannot be fully utilized, and there is room for improvement of the heating performance. Is left.
[0006]
The present invention has been made based on such a conventional technique, and has a structure in which the bypass passage and the hot air passage are compactly configured, while improving the heating performance in the full hot mode while ensuring the maximum blowing performance of the cold air. It is an object of the present invention to provide an air conditioner for a vehicle that can be operated.
[0007]
[Means for Solving the Problems]
According to the first aspect of the present invention, a hot air passage in which a heater core is disposed and a bypass passage that bypasses the hot air passage and allows cool air to pass therethrough are provided downstream of the evaporator. An air mix door is provided which is arranged in parallel with the inlet of the warm air passage, and selectively opens and closes the bypass passage inlet and the warm air passage inlet. The air conditioning for the vehicle, in which the wake of the heater core is curved toward the bypass passage side, mixes the cool air from the bypass passage and the warm air from the hot air passage to form a conditioned air at a predetermined temperature, and blows out from the outlet of the wake. In the device,
A rectifying projection is provided at a position downstream of the inlet of the warm air passage and upstream of the heater core, at a position where the straightening protrusion interferes with an end of the heater core on the side of the bypass passage.
[0008]
According to a second aspect of the present invention, in the vehicle air conditioner according to the first aspect, the partition wall section for partitioning the bypass passage and the hot air passage and the guide wall are integrally formed. Is what you do.
[0009]
According to a third aspect of the present invention, in the vehicle air conditioner according to the first or second aspect, the hot air guide wall that guides the hot air that has passed through the heater core toward the bypass path is provided by the air flow through the heater core. It is characterized in that it is arranged close to and substantially parallel to the rear surface.
[0010]
According to a fourth aspect of the present invention, in the vehicle air conditioner according to any one of the first to third aspects, the upstream portion of the hot air passage is gradually widened toward a side opposite to the partition wall. The vertical width of the heater core is set to be larger than the vertical width of the inlet of the hot air passage.
[0011]
According to a fifth aspect of the present invention, in the vehicle air conditioner according to any one of the first to fourth aspects, the air mix door is slidable along the bypass passage entrance and the hot air passage entrance. It is configured as a slide-type air mix door for distributing and adjusting the flow rate to the bypass passage inlet and the warm air passage inlet, and the bypass passage inlet and the warm air passage inlet are arranged close to the rear surface of the evaporator. It is assumed that.
[0012]
【The invention's effect】
According to the first aspect of the present invention, the bypass passage and the hot air passage have a compact structure while ensuring the maximum blowing performance of the cold air as in the related art. In this structure, when the inlet of the warm air passage is fully opened by the air mix door, the air that tends to be biased toward the bypass passage side of the heater core is diffused toward the center of the heater core by the rectifying protrusion, and the entire heater core is effectively used. it can.
[0013]
That is, according to the first aspect of the present invention, the heating performance in the full hot mode can be improved in a structure in which the bypass passage and the hot air passage are compactly configured while ensuring the maximum blowing performance of the cold air.
[0014]
According to the second aspect of the present invention, there is no need to separately install a rectifying projection, so that the cost is reduced.
[0015]
According to the third aspect of the invention, the hot air passage can be made more compact. In addition, when the hot air is suddenly changed to the bypass passage side as described above, since the wind is more likely to be biased toward the end of the heater core on the bypass passage side, the rectifying protrusion according to claim 1 acts more effectively.
[0016]
According to the invention described in claim 4, the ventilation area of the heater core can be set large, and high heating performance can be maintained. In addition, in the case of such a structure, a large difference in the amount of air flow between the end of the heater core on the bypass passage side and the end on the opposite side is likely to occur, so that the rectifying projection according to claim 1 is more effective. Act on.
[0017]
According to the fifth aspect of the invention, the size of the device can be further reduced.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall cross-sectional view of a temperature control unit of the vehicle air conditioner of this embodiment, FIG. 2 is an explanatory diagram showing the flow of conditioned air in the vehicle air conditioner at full cooling, and FIG. 3 is the vehicle air conditioner. And FIG. 4 is an explanatory diagram showing the flow of the conditioned air when the vehicle air conditioner is full hot.
[0019]
As shown in FIG. 1, the vehicle air conditioner includes an intake box (not shown) for selectively introducing inside and outside air, a blower (not shown) for sending air from the intake box to a downstream side, and air from the blower. And a temperature control unit 1 that controls the temperature and blows out the vehicle interior.
[0020]
The temperature control unit 1 of this embodiment is an integrated temperature control unit 1 in which a heater unit and a cooler unit are integrally formed. Hereinafter, the temperature control unit 1 will be described in detail.
[0021]
The temperature control unit 1 includes an evaporator 5, an air mix door device 6, a heater core 7, and doors 21, 22, 23 in a ventilation path formed in the temperature control case 2.
[0022]
In the temperature control case 2, an inlet 8 as an upstream end of the air passage and outlets 9, 10, and 11 as a downstream end of the air passage are opened. The blown air flows along the side walls of the case and is blown out from the outlets 9, 10 and 11.
[0023]
The evaporator 5 as a heat exchanger for cooling is interposed in a refrigeration cycle (not shown), and circulates a refrigerant in a low-temperature and low-pressure state therein to absorb heat, thereby cooling and dehumidifying the passing air. It is.
[0024]
The heater core 7 serving as a heat exchanger for heating is interposed in a hot water line (not shown), and radiates heat of engine cooling water, which has been heated by exhaust heat of the engine, as a heat source, thereby heating the ventilation air.
[0025]
The air mixing door device 6 is disposed downstream of the evaporator 5 and upstream of the heater core 7, and controls the driving force of a door case 61, an air mixing door 62 in the door case 61, and a driving unit (not shown). And a link mechanism (not shown) for transmitting the air to the air mix door 62.
[0026]
The door case 61 includes a plate-shaped upstream wall that is disposed substantially parallel to the rear ventilation surface 5b of the evaporator 5 and a downstream wall that is bulged in an arc shape on the downstream side. A cool air introduction portion 63 is formed on the upstream wall. On the other hand, in the arc-shaped downstream wall, an inlet 65 of the warm air passage 12 for passing the cool air from the evaporator 5 to the heater core 7 is formed in a substantially lower half part, and the cool air from the evaporator 5 is formed in a substantially upper half part. Is formed at the entrance 66 of a bypass passage which allows the air to flow through the heater core 7.
[0027]
The air mix door 62 is formed in an arc shape like the downstream wall. The air mix door 62 slides up and down along the wake wall of the door case 61 over the warm air passage entrance 65 and the bypass passage entrance 66, whereby the bypass passage 13 and the warm air passage 12 are moved. Distribute and adjust the amount of cold air to
[0028]
The bypass passage 13 is formed substantially linearly.
[0029]
On the other hand, the hot air passage 12 is formed such that its subsequent flow is curved toward the bypass passage. Specifically, the downstream side of the heater core 7, that is, the downstream side portion 12 </ b> B of the hot air passage 12, is provided with a hot air guide wall 30 that is disposed in parallel with and close to the ventilation rear surface 7 b of the heater core 7, thereby forming an upper bypass. It is curved toward the passage 13. The hot air guide wall 30 is formed so as to be curved above the partition wall 31 that divides the bypass passage 13 and the hot air passage 12, so that the outlet 12a of the warm air passage 12 is connected to the bypass passage inlet. I'm facing 66.
[0030]
The heater core 7 is disposed close to the inlet 65 of the hot air passage 12, and a passage from the inlet 65 of the hot air passage 12 to the heater core 7, that is, an upstream portion 12 </ b> A of the hot air passage 12 is connected to the partition wall 31. Is gradually widened toward the opposite side (the lower side in FIG. 1), so that the vertical width H7 of the heater core 7 is set to be larger than the vertical width H1 of the hot air passage entrance 65.
[0031]
The downstream junction of the bypass passage 13 and the hot air passage 12 is set as an air mixing chamber 14 for mixing the cool air and the hot air.
[0032]
In the air mix chamber 14, a defroster outlet passage communicating with the foot outlet 11, a vent outlet 10, and the defroster outlet 9 sequentially above the hot air outlet 12 a. 19 and an entrance 20 are connected to each other. Thus, while the air mix chamber 14 is small, the blowing performance of cold air from the vent outlet 10 (blowing performance during cooling) and the blowing performance of warm air from the foot outlet 11 (blowing performance during heating) ) And the layout can be compatible. In particular, in this embodiment, since the bypass passage 13 and the vent outlet 10 are located substantially opposite to each other, the structure has a high cooling air blowing performance.
[0033]
Here, the defroster outlet 9 blows out conditioned air toward the vehicle front window glass. The vent outlet 10 is connected to a center vent duct disposed toward the occupant's chest and a side vent duct disposed toward the vehicle's side window glass, and supplies air-conditioned air toward the occupant's chest and the vehicle side window glass. It blows out. The foot outlet 11 is connected to a front foot duct and a rear foot duct arranged toward the occupant's feet, and blows out conditioned air toward the occupant's feet.
[0034]
In this embodiment, a so-called butterfly type composite mode door 23 is provided in the air mix chamber. This composite mode door is for reducing the difference in temperature (upper and lower temperature difference) between the outlet temperature of the vent outlet 10 and the foot outlet 11 in the bi-level mode, and foot outlet from the outlet 12 a of the hot air passage 12. The first gate 25 that forms the shortest flow path from the bypass passage entrance 66 to the vent outlet 10 in the shortest flow path to the entrance 16 of the passage 15 is opened and closed. That is, at the time of air mixing, by closing the first gate 25 with the composite mode door 23, the warm air from the hot air passage 12 and the cool air from the bypass passage 13 are bypassed by the first gate 25, It is distributed to the second gate 26. As a result, the length of the passage in which the warm air and the cool air are mixed becomes longer, and even in the combined mode in which the conditioned air is blown from the upper and lower portions of the temperature control case 2 such as the bi-level mode and the foot defroster mode, too large a vertical direction. The difference in temperature can be avoided.
[0035]
In order to set a case in which both the vent outlet 10 and the foot outlet passage 15 are closed (defroster mode), the second gate 26 can be closed by the defroster door 21. That is, in the defroster mode, the defroster door 21 fully opens the defroster outlet passage 19 and completely closes the second gate 26, and the combined mode door 23 fully closes the first gate 25, thereby opening the vent outlet. By opening the defroster outlet passage 19 while preventing the conditioned air from flowing into both the 10 and the foot outlet passage 15, the conditioned air can be blown out from the defroster outlet passage 19.
[0036]
By the way, in this embodiment, while the bypass passage 13 is formed substantially linearly as described above, in the structure in which the downstream portion 12B of the hot air passage 12 is formed to be curved from the heater core 7 toward the bypass passage 13 side, A rectifying projection 33 is provided at a position downstream of the hot air passage inlet 12 and upstream of the heater core 7 at a position in the effective ventilation surface of the heater core 7 that interferes with the bypass passage side end 7u.
[0037]
"Action"
Hereinafter, the flow of the conditioned air in the main mode of the vehicle air conditioner of this embodiment will be described with reference to FIGS.
[0038]
Full cool (Fig. 2)
At the time of full cooling, the air mix door 62 is set at the lower end position as shown in FIG. That is, at the time of full cooling, the hot air passage 12 is fully closed and the bypass passage 13 is fully opened, whereby all the cool air cooled by the evaporator 5 passes through the bypass passage 13 and the cool air is blown out from the predetermined outlet.
[0039]
The blow mode at the time of the full cool is generally a vent mode as shown in FIG. That is, the vent outlet 10 fully opens the vent outlet 10 and the foot outlet passage 15 is fully closed, the defroster door 21 fully closes the defroster outlet passage 19, and the conditioned air is blown only from the vent outlet 10. In this vent mode, the composite mode door 23 is set so as to open the first gate 25 located in the shortest flow path and substantially along the direction from the bypass passage 13 to the vent outlet 10. Thereby, the ventilation resistance against the cool air mainstream flowing from the bypass passage 13 toward the vent outlet 10 is minimized.
[0040]
At the time of air mixing (Fig. 3)
At the time of air mixing, the air mixing door 62 is adjusted and set between a lower end position and an upper end position in accordance with a required blowing temperature. That is, both the hot air passage 12 and the bypass passage 13 at the time of air mixing are opened, whereby the cool air that has passed through the bypass passage 13 and the warm air that has passed through the hot air passage 12 are mixed, and the cool air flows from a predetermined outlet. Be blown out.
[0041]
In the example of FIG. 3, the blowing mode is the bi-level mode. That is, the defroster door 21 is fully closed, the vent foot door 22 is set at the intermediate position, and the temperature-controlled air is simultaneously blown from the vent outlet 10 and the foot outlet passage 15. In the bi-level mode, the combined mode door 23 closes the first gate 25, and the cool air and the hot air bypass the shortest flow path (the first gate 25). Therefore, the passage for mixing the cool air and the warm air becomes longer, the cool air and the warm air are more uniformly mixed, and the temperature difference between the vent outlet 10 and the foot outlet 11 (upper / lower temperature difference) becomes smaller. I have.
[0042]
Full hot (Fig. 4)
At the time of full hot, the air mix door 62 is set at the upper end position as shown in FIG. That is, at the time of full hot, the hot air passage 12 is fully opened and the bypass passage 13 is fully closed, whereby all the air cooled and dehumidified by the evaporator 5 passes through the hot air passage 12 and the hot air is blown out from a predetermined outlet. You.
[0043]
In the example of FIG. 4, the blowing mode is the foot mode. That is, the vent outlet 10 is completely closed and the foot outlet passage 15 is fully opened by the vent foot door 22, the defroster outlet passage 19 is fully closed by the defroster door 21, and hot air is blown only from the foot outlet 11.
[0044]
"Action"
Here, in the vehicle air conditioner of this embodiment, the air mix door 62 closes the bypass passage entrance 66 and fully opens the warm air passage entrance 65 at the time of full hot, so that the bypass passage side 7u of the heater core 7 is closed. The wind that tends to be biased (upward) (see FIG. 5 in the related art) is diffused toward the center of the heater core 7 by the rectification protrusion 33. Thereby, the entire ventilation surface of the heater core 7 can be effectively used.
[0045]
"effect"
That is, according to the vehicle air conditioner of this embodiment, first, in a structure in which the bypass passage 13 and the hot air passage 12 are compactly configured while ensuring the maximum blowing performance of the cold air, the heating performance in the full hot mode is improved. Can be improved.
[0046]
Secondly, according to the vehicle air conditioner of this embodiment, since the rectifying projections 33 are integrally protruded from the partition wall 31, there is no need to separately attach the rectifying projections 33, and the cost is reduced.
[0047]
Thirdly, according to the vehicle air conditioner of this embodiment, the warm air passage 12 can be made more compact because the warm air guide wall 30 is disposed in close proximity to the rear ventilation surface 7b of the heater core 7. Moreover, when the warm air passage 12 is sharply curved toward the bypass passage 13 as described above, the wind is more likely to be biased toward the bypass passage-side end 7u of the heater core 7, so that the rectifying projection 33 acts more effectively. .
[0048]
Fourth, according to the vehicle air conditioner of this embodiment, the portion 12A from the hot air passage entrance 65 of the hot air passage 12 to the heater core 7 is gradually directed toward the opposite side (lower side) from the partition wall 31. Since the heater core 7 is formed to be wider and the vertical width H2 of the heater core 7 is set to be larger than the vertical width H1 of the warm air passage entrance 65, the ventilation area of the heater core 7 is set to be large while maintaining a compact size in the vehicle longitudinal direction. By doing so, high heating performance can be demonstrated. In addition, in the case of such a structure, a large difference in the amount of air between the bypass core side end (upper side) 7u and the opposite end (lower side) 7d of the heater core is likely to occur, so that the rectification projection is formed. 33 works even more effectively.
[0049]
Fifth, according to the vehicle air conditioner of this embodiment, the air mix door 62 is slidably provided along the bypass passage entrance 66 and the hot air passage entrance 65, and the bypass passage entrance 66 and the hot air passage entrance are provided. The evaporator 5 and the heater core 7 are arranged as a slide-type air mix door 62 for distributing and adjusting the amount of air flowing to the evaporator 65, and the bypass passage inlet 66 and the hot air passage inlet 65 are arranged close to the evaporator 7 ventilation outlet surface 7b. (In this embodiment, the vehicle front-rear direction).
[0050]
In short, according to the present invention, the bypass passage is formed substantially linearly, and the downstream portion of the warm air passage is curved toward the bypass passage side, so that the bypass is achieved while ensuring the maximum blowing performance of the cool air. In a structure in which the passage and the hot air passage are compactly formed, the rectifying projection can improve the heating performance in the full hot mode.
[Brief description of the drawings]
FIG. 1 is a sectional view of a temperature control unit of a vehicle air conditioner according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram showing the flow of conditioned air during full cooling of the vehicle air conditioner.
FIG. 3 is an explanatory diagram showing a flow of conditioned air at the time of air mixing of the vehicle air conditioner.
FIG. 4 is an explanatory view showing the flow of conditioned air when the vehicle air conditioner is full hot.
FIG. 5 is a cross-sectional view of a temperature control unit of a conventional vehicle air conditioner, illustrating the flow of conditioned air at the time of full hot.
[Explanation of symbols]
5 evaporator 5b evaporator rear ventilation surface 7 heater core 7d heater core ventilation rear surface 7u heater heater bypass side end 12 hot air passage 12A upstream 12B downstream W12a hot air outlet 13 bypass passage 14 ... air mix chamber 30 ... warm air guide wall 31 ... partition wall 33 ... rectification protrusion 65 ... warm air passage entrance 66 ... bypass passage entrance H1 ... vertical width H7 ... vertical width

Claims (5)

A hot air passage (12) in which a heater core (7) is arranged and a bypass passage (13) for bypassing the hot air passage (12) and passing cool air as it is provided downstream of the evaporator (5). An air mixing door (62) that is arranged in parallel with the passage entrance (66) and the warm air passage entrance (65) and selectively opens and closes the bypass passage entrance (66) and the warm air passage entrance (65); The bypass passage (13) is formed substantially linearly, while the downstream portion (12B) of the warm air passage (12) is curved toward the bypass passage (13), and is formed from the bypass passage (13). In the vehicle air conditioner, the cold air and the hot air from the hot air passage (12) are mixed and blown out from the downstream outlets (9, 10, 11).
A rectifying projection (33) is provided downstream of the hot air passage inlet (65) and upstream of the heater core (7) at a position where the flow straightening protrusion (33u) interferes with a bypass passage side end (7u) of the heater core (7). Vehicle air conditioner. The vehicle air conditioner according to claim 1,
An air conditioner for a vehicle, wherein a partition wall (31) for partitioning the bypass passage (13) and the hot air passage (12) and the rectifying protrusion (33) are integrally formed. The vehicle air conditioner according to claim 1 or 2,
A hot air guide wall (30) for guiding the hot air that has passed through the heater core (7) toward the bypass path (13) is disposed substantially parallel to and near the rear surface (7b) of the heater core (7). Characteristic vehicle air conditioner. The vehicle air conditioner according to any one of claims 1 to 3, wherein an upstream portion (12A) of the hot air passage (12) is gradually widened toward a side opposite to the partition wall (31). An air conditioner for a vehicle, wherein a vertical width (H2) of the heater core (7) is set larger than a vertical width (H1) of the hot air passage entrance (65). The vehicle air conditioner according to any one of claims 1 to 4, wherein the air mix door (62) is slidably provided along the bypass passage entrance (66) and the hot air passage entrance (65). A sliding air mix door (62) for distributing and adjusting the amount of air flow to the bypass passage inlet (66) and the warm air passage inlet (65);
An air conditioner for a vehicle, wherein the bypass passage entrance (66) and the hot air passage entrance (65) are arranged close to the ventilation rear surface (5b) of the evaporator (5).

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