JP2004106605A - Air conditioner for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a vehicle capable of realizing a suitable environment within a cabin by making a blowoff temperature in a vehicle width direction at a blowoff port more uniform. <P>SOLUTION: A hot air guide plate 27 constituted of a hot air guide part 28 of a vehicle width direction center part and a hot air diffusion part 29 projectingly provided on a vehicle width direction side from the hot air guide part 28 is provided in the vicinity of an outlet 67 of a bypass passage 66. As a result, hot air tending to deviate to both vehicle width direction sides due to pushing of cold air is guided to the vehicle width direction center by the hot air guide part 28, a part of the hot air guided to the width direction center can be diffused to both vehicle width direction sides by the hot air diffusion part 29, and thereby a blow-off temperature difference in the vehicle width direction can be reduced. Since a hot air guide plate 27 is capable of comparatively easily changing width direction lengths and surface shapes of the hot air guide part 28 and the hot air diffusion part 29, uniformity of the blowoff temperature can be easily adjusted. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vehicle air conditioner.
[0002]
[Prior art]
The vehicle air conditioner includes an evaporator, a heater core, and an air mixing door. The hot air that has passed through the heater core in the downstream air mix chamber and the cool air that has bypassed the heater core are mixed, and the conditioned air having a desired temperature is blown toward the vehicle interior. The air mix chamber is provided with a defroster outlet passage, a vent outlet passage, and a foot outlet passage. By controlling the opening and closing of a mode switching door for selectively switching the outlet passage, the air is blown out from a desired outlet passage. (For example, Patent Documents 1 and 2).
[0003]
[Patent Document 1]
JP-A-2000-108636
[Patent Document 2]
JP 2000-71748 A
[0004]
[Problems to be solved by the invention]
However, since the warm air is pushed back to the cool air, during the air mixing of the cool air and the warm air, the cool air is biased toward the center in the width direction of the outlet and the warm air is biased on both sides in the width direction of the outlet, and the outlet temperature in the width direction is reduced. Tends to be non-uniform.
[0005]
The present invention has been made based on such a conventional technique, and an object of the present invention is to provide a vehicle air conditioner capable of realizing a suitable vehicle interior environment by making the blowing temperature in the width direction more uniform.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, an air mix door is provided between the evaporator and the heater core for controlling the amount of cool air to be passed through the heater core and the amount of cool air to bypass the heater core, and a heater core is provided downstream of the heater core. In an air conditioner for a vehicle, which forms an air mixing chamber for mixing hot air that has passed through and cool air that has bypassed a heater core, and has a defroster outlet passage, a vent outlet passage, and a foot outlet passage in the air mix chamber,
A hot air guide section that wind-blocks a central portion in the width direction of the main flow of the cool air flowing from the bypass passage toward the vent outlet passage, and guides a portion of the hot air that has passed through the heater core to the central portion in the width direction; A hot air guide plate provided with a hot air diffusing portion projecting from the guide portion in the width direction and diffusing hot air guided along the hot air guide portion in the width direction. It is assumed that.
[0007]
According to the second aspect of the invention, in the vehicle air conditioner according to the first aspect, the hot air guide plate is provided so as to project from a central portion in the width direction of the hot air guide portion toward a downstream side of the main flow of the cold air, and It is characterized in that it is provided with a partition wall that regulates mutual entrainment of the main stream of cold air divided in the width direction by the hot air guide portion, and is formed in a substantially T-shaped cross section.
[0008]
According to a third aspect of the present invention, in the vehicle air conditioner according to the first or second aspect, the hot air diffusing portion of the hot air guide plate is located at a position where it interferes with the outlet of the bypass passage. It is assumed that.
[0009]
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 air mix door slides in a vertical direction across the bypass passage and the heater core side passage. A vertical hot air passage is formed in the downstream part of the heater core to direct the warm air that has passed through the heater core upward and circulates, and the outlet of the hot air passage faces the outlet of the bypass passage. Is set as an air mixing chamber that mixes cool air and hot air, a foot outlet passage is arranged adjacent to the outlet of the hot air passage provided in the air mix chamber, and a vent outlet passage is located above the foot outlet passage. Are arranged adjacent to each other.
[0010]
According to a fifth aspect of the present invention, in the vehicle air conditioner according to the fourth aspect, a foot outlet passage, a vent outlet passage, and a defroster outlet passage are sequentially connected to the upper side of the outlet of the hot air passage toward the upper side. A compound mode door is provided for opening and closing the gate located in the shortest flow path from the outlet of the hot air passage to the entrance of the foot blow passage and the shortest flow path from the outlet of the bypass passage to the inlet of the vent blow passage. It is characterized by the following.
[0011]
According to a sixth aspect of the present invention, in the vehicle air conditioner according to the fifth aspect, the warm air from the warm air passage is supplied to the central portion in the width direction at a downstream side of the combined mode door and near the warm air passage outlet. And a hot air diffusion plate that diffuses in the width direction from the side is provided.
[0012]
【The invention's effect】
According to the first aspect of the present invention, the warm air which is apt to be biased to both sides in the width direction by the cold air is guided to the center in the width direction by the warm air guide portion, and a part of the warm air in the center in the width direction is heated. Since the air can be diffused to both sides in the width direction by the wind diffusion portion, the difference in the blowing temperature in the width direction can be reduced. In other words, according to the first aspect of the present invention, it is possible to provide a more suitable vehicle interior environment by making the blowing temperature in the width direction at the outlet more uniform.
[0013]
Note that the hot air guide plate guides part of the hot air that has passed through the heater core to the main flow of the cool air that flows from the bypass passage toward the vent outlet. The amount of warm air to the vent outlet where the amount of warm air tends to decrease can be increased, and the amount of warm air to the foot outlet where the amount of warm air tends to increase can be reduced. In other words, the hot air guide plate has an additional effect of reducing the difference (vertical difference temperature) between the vent outlet temperature and the foot outlet temperature in the bilevel mode.
[0014]
According to the second aspect of the present invention, in addition to the effect of the first aspect, the warm air guide plate is formed in a substantially T-shaped cross section by the warm air guide portion and the partition wall. By the portion, warm air can be more effectively attracted to the central portion in the width direction.
[0015]
According to the third aspect of the invention, in addition to the effect of the first or second aspect, the hot air diffusion portion is located at a position where the hot air diffusion portion interferes with the outlet of the bypass passage. This disturbs a part of the main flow of the cold air, whereby the hot air and the cold air are further mixed well, and the uniformity of the blowing temperature in the width direction is further improved.
[0016]
According to the invention as set forth in claim 4, in a layout capable of maintaining the maximum cooling performance at the time of cooling and the maximum cooling performance at the time of heating while making the air mix chamber relatively small, the layout according to claim 1 to claim 3 is provided. The effects of the invention can be obtained.
[0017]
According to the fifth aspect of the invention, in addition to the effect of the fourth aspect of the invention, when the shortest flow path is closed by the combined mode door, the cool air and the hot air bypass the shortest flow path and the passage length is reduced. Since the air flows around the long bypass flow path, the warm air and the cool air are more uniformly mixed, and the temperature difference between the vent outlet and the foot outlet in the bilevel mode (upper / lower temperature difference) can be further reduced.
[0018]
Note that when in the vent mode, it is desirable to open the shortest flow path with the combined mode door to exhibit maximum blowing performance not only during full cooling but also during air mixing. In such a case, if the discharge temperature uniformity is tuned in the flow path passing through the bypass channel by closing the composite mode door, in the blow mode in which the composite mode door is opened and the shortest flow path is circulated, the hot air guide plate Therefore, the center in the width direction tends to be excessive in hot air. The invention described in claim 6 solves this.
[0019]
According to the invention described in claim 6, in addition to the effect of the invention described in claim 5, in addition to the hot air diffusion plate provided downstream of the composite mode door and near the outlet of the hot air passage, when the composite mode door is opened. The hot air diffusion plate acts, and the hot air that is deflected toward the center in the width direction is diffused to the side, so that excess hot air at the center in the width direction can be eliminated. Thereby, the uniformity of the warm air in the width direction can be maintained both when the composite mode door is opened and when it is closed.
[0020]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings. 1 is an overall perspective view showing the vehicle air conditioner of this embodiment, FIG. 2 is an exploded perspective view of a unit case of an air conditioning unit of the vehicle air conditioner, and FIG. 3 is a perspective view showing a main part of the vehicle air conditioner. 4 is a sectional view taken along line SA-SA in FIG. 1, FIG. 5 is a sectional view taken along line SB-SB in FIG. 1, FIG. 6 is a top view near the vent outlet, and FIG. FIG. 8 is a diagram showing the flow of the conditioned air in the vent mode (air mix), and FIG. 9 is a diagram showing the flow of the conditioned air in the bi-level mode (air mix). 10 is a diagram showing the flow of the conditioned air in the foot mode (full hot), FIG. 11 is a diagram showing the flow of the conditioned air in the differential mode (full hot), and FIG. 12 is a diagram showing the flow of the conditioned air in the foot defroster mode (full hot). FIG.
[0021]
As shown in FIG. 1, the air conditioner for a vehicle includes an intake box 70 for selectively introducing inside and outside air, a blower 80 for sending air from the intake box 70 to the downstream, and a temperature controller for air from the blower 80. And a temperature control unit 1 that blows out into the vehicle interior. 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.
[0022]
The temperature control unit 1 of this embodiment is a left and right independent temperature control unit 1 capable of independently adjusting the blow-out temperatures on the driver's seat side and the passenger's seat side, and as shown in FIGS. The wake 6 is divided by a partition plate 3 into two passages, a driver's seat passage and a passenger's seat passage.
[0023]
Hereinafter, the temperature control unit 1 will be described in detail mainly with reference to FIG.
[0024]
The temperature control unit 1 includes an evaporator 5 as a cooling heat exchanger and an air mixing door device 6 in a unit case 2 (see FIGS. 1 and 2) formed by combining divided cases 2a and 2b with a partition plate 3 interposed therebetween. And a heater core 7 as a heat exchanger for heating.
[0025]
The unit case 2 is provided with an inlet 8, a defroster outlet 9, a vent outlet 10, and a foot outlet 11 for blowing air introduced from the inlet 8 and temperature-controlled in the airflow path. ing. As a result, the air blown from the blower 80 is introduced into the unit case 2 from the inlet 8, directed to the both side walls of the case, flows downstream along the both side walls, and blows out the outlets 9, 10, 11. Is selectively blown out from.
[0026]
The defroster outlet 9 blows out conditioned air toward the vehicle front window glass. The vent outlet 10 comprises a center vent outlet 10A at the center of the vehicle and side vent outlets 10B at both sides of the vehicle, and a center vent (not shown) disposed toward the occupant's chest at the center vent outlet 10A. A duct is connected to the side vent outlet 10B, which is connected to a side vent duct (not shown) disposed toward the vehicle side window glass, and blows out conditioned air toward the occupant's chest and the vehicle side window glass. . The foot outlet 11 is connected to a front foot duct and a rear foot duct (not shown) disposed toward the feet of the occupant, and blows conditioned air toward the feet of the occupant.
[0027]
The evaporator 5 is interposed in a refrigeration cycle (not shown) and circulates a refrigerant in a low-temperature and low-pressure state therein to absorb heat from the refrigerant, while the heater core 7 is interposed in a hot water line (not shown). In addition, heat is generated by using the engine cooling water, which has become hot due to the exhaust heat of the engine, as a heat source.
[0028]
The air mix door device 6 is disposed downstream of the evaporator 5 and upstream of the heater core 7, and includes an air mix door 62 in a door case 61. The door case 61 is provided with a cool air introduction portion 63 on the upstream side, and an outlet 65 of a heater core side passage 64 for passing cool air from the evaporator 5 to the heater core 7 in a substantially lower half portion on the downstream side. The half has an outlet 67 of a bypass passage 66 for allowing the cool air from the evaporator 5 to bypass the heater core 7. The air mix door 62 slides up and down over the outlet 65 of the heater core side passage 64 and the outlet 67 of the bypass passage 66 so as to distribute the introduction of cool air to the bypass passage 66 and the heater core side passage 64. It has become. In this embodiment, two air mix doors 62, 62 which are independently driven corresponding to the driver's seat side passage and the passenger side passage behind the air mix door device 6, are provided. Thereby, the blowing temperature can be adjusted independently on the driver's seat side and the passenger's seat side.
[0029]
A vertical wall portion 31 is provided in a downstream portion of the heater core 7 disposed close to the outlet 65 of the heater core side passage 64, and a vertical temperature that allows the warm air that has passed through the heater core 7 to flow upward. An air passage 12 is formed.
[0030]
The outlet 13 of the hot air passage 12 is provided at an outlet 67 of the bypass passage 66, and the confluence of the outlets 13 and 67 is set as an air mixing chamber 14 for mixing the cool air and the hot air. ing.
[0031]
The air mix chamber 14 has an inlet 16 of a foot outlet passage 15 communicating with the foot outlet 11 upward and a vent outlet communicating with the vent outlet 10 above the outlet 13 of the warm air passage 12. An inlet 18 of the passage 17 and an inlet 20 of a defroster outlet passage 19 communicating with the defroster outlet 9 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, the outlet 67 of the bypass passage 66 and the inlet 18 of the vent outlet passage 17 are substantially opposed to each other, so that the blowing performance of the cool air is high.
[0032]
At the entrance 20 of the defroster outlet passage 19, a defroster door 21 for opening and closing the defroster outlet passage 19 is provided, and at a branch point between the foot outlet passage 15 and the vent outlet passage 17, these inlets 16 are provided. A vent foot door 22 that selectively opens and closes 18 is provided. The blow mode can be selected by the blow mode switching doors 21 and 22.
[0033]
In this embodiment, a so-called butterfly-type compound mode door is provided in the air mix chamber 14 in order to reduce the difference in temperature between the vent air outlet 10 and the foot air outlet 11 in the bi-level mode. 23 is supported. The composite mode door 23 constitutes the shortest flow path from the outlet 13 of the warm air passage 12 to the inlet 16 of the foot outlet passage 15 and the shortest flow path from the outlet 67 of the bypass passage 66 to the inlet 18 of the vent outlet passage 17. The first gate 25 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 66 are bypassed by the first gate 25, and It is distributed to the second gate 26. As a result, the length of the passage in which the hot air and the cold air are mixed increases, and even in a combined mode in which the conditioned air is blown from the upper and lower portions of the unit case 2 such as the bi-level mode or the foot defroster mode, an excessive vertical difference is caused. It becomes hard to get warm. In this embodiment, the compound mode door 23 is a revolving door. However, the compound mode door 23 may be, for example, a sliding door that slides along an extension of the vertical wall 31.
[0034]
Here, in order to set a case where both the vent outlet passage 17 and the foot outlet passage 15 are closed (defroster mode), the second gate 26 can be closed by the defroster door 21. In other words, 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 completely closes the first gate 25, whereby the vent outlet passage is opened. The defroster outlet passage 19 is opened while preventing the conditioned air from flowing into both the foot outlet passage 17 and the foot outlet passage 15, so that the conditioned air can be blown out from the defroster outlet passage 19.
[0035]
In the vehicle air conditioner having such a basic configuration, the present embodiment has the following features.
[0036]
First, a first feature is that a warm air guide plate 27 is provided. The hot air guide plate 27 is provided at a substantially central portion in the vehicle width direction in the air mix chamber 14 as shown in FIGS. 2 to 4, and includes a hot air guide portion 28 and a hot air diffusion portion 29. It is formed in a substantially T-shape across the plate 3.
[0037]
The hot air guide portion 28 of the hot air guide plate 27 extends from the outlet 13 of the hot air passage 12 toward the vicinity of the upper end of the outlet 67 of the bypass passage 66, and is provided with a main flow of the cool air flowing from the bypass passage 66 to the vent outlet passage 17. The central portion in the width direction is blocked, and a part of the warm air that has passed through the heater core 7 is guided and circulated to the central portion in the width direction. In this embodiment, since the hot air guide plate 27 has a structure protruding from the partition plate 3, the hot air guide portion 28 is located downstream of the hot air guide portion 28 of the mainstream of the cool air from the widthwise central portion of the hot air guide portion 28. The partition wall 34 protrudes toward the downstream side of the mainstream of the cool air. That is, the warm air guide plate 27 is formed as a T-shaped cross section by the warm air guide portion 28 and the partition wall 34. Therefore, the main flow of the cold air, which is divided into two in the vehicle width direction by the hot air guide portion 28, is restricted from being caught by the partition wall 34, whereby the warm air can be more effectively attracted to the central portion in the vehicle width direction. Has become.
[0038]
The hot air diffusing section 29 projects from the upper portion of the hot air guide section 28 to the side in the vehicle width direction, and removes a part of the hot air guided by the hot air guide section 28 at the center in the vehicle width direction. It diffuses toward the side in the width direction.
[0039]
With such a hot air guide plate 27, a part of the warm air, which tends to be biased to both sides in the vehicle width direction due to the cold air, can be guided to the center in the width direction, and a part thereof can be diffused to both sides in the vehicle width direction. The temperature difference in the vehicle width direction in the mix chamber 14 can be reduced, so that the outlet temperature unevenness in the vehicle width direction at the downstream outlets 9, 10, and 11 can be corrected.
[0040]
As described above, according to the vehicle air conditioner of this embodiment, it is possible to provide a more suitable vehicle interior environment by making the outlet temperature in the vehicle width direction at the outlets 9, 10, and 11 more uniform.
[0041]
Further, since the shape of the hot air guide plate 27 can be easily changed in design, tuning is easy. Further, even when applied to different temperature control units, the uniformity of the blowing temperature can be adjusted relatively easily.
[0042]
Note that the warm air guide plate 27 guides and distributes a part of the warm air that has passed through the heater core 7 to the cool air mainstream flowing from the bypass passage 66 toward the vent outlet 10, and has an additional effect. In the bi-level mode, the amount of warm air to the vent outlet 10 where the amount of warm air tends to decrease can be increased, and the amount of warm air to the foot outlet 11 where the amount of warm air tends to increase can be reduced. That is, the hot air guide plate 27 also has an additional effect of reducing the difference (vertical difference temperature) between the vent outlet temperature and the foot outlet temperature in the bilevel mode.
[0043]
Here, in this embodiment, the warm air diffusion portion 29 is disposed near the outlet 67 of the bypass passage 66 at a position where the warm air diffusion portion 29 interferes with the outlet 67, and goes from the outlet 67 of the bypass passage 66 to the vent outlet passage 17. The upper part of the cool air mainstream is diffused. Therefore, the warm air diffusion unit 29 disturbs the flow of the upper part (part) of the cool air mainstream, and the disturbed part of the cool air flows downstream while entraining the warm air flowing along the warm air diffusion unit 29. . Thereby, even in a structure in which the air mix chamber 14 is set to be narrow, mixing of the warm air and the cool air is further promoted.
[0044]
The second feature is to eliminate the temperature non-uniformity occurring in the structure using the combined mode door 23 and the hot air guide plate 27 together. Specifically, when the temperature uniformity in the vehicle width direction is tuned with the composite mode door 23 closed, when the composite mode door 23 is opened and the shortest flow path is circulated (for example, in the vent mode), hot air The warm air drawn toward the center in the vehicle width direction by the guide plate 27 tends to blow out from the center as soon as it is sufficiently diffused. In this embodiment, in order to solve this, in the downstream of the combined mode door 23 and near the exit 13 of the hot air passage 12, the hot air from the hot air passage 12 is directed from the vehicle width center to the vehicle width direction side. A hot air diffusing plate 33 for diffusing is provided. Thus, even when the temperature uniformity in the vehicle width direction is tuned in a state where the composite mode door 23 is closed, the hot air that is deflected toward the center in the vehicle width direction when the composite mode door 23 is opened is dispensed with the hot air diffusion plate 33. As a result, temperature uniformity in the vehicle width direction can be ensured by diffusing laterally in the vehicle width direction.
[0045]
Hereinafter, the flow of the conditioned air in each mode will be described based on FIGS. 7 to 12.
[0046]
(1) Vent mode (full cool) See Fig. 7
The vent mode is a mode for cooling the vehicle interior. In the vent mode, as shown in FIG. 7, the vent outlet passage 17 is fully opened and the foot outlet passage 15 is fully closed by the vent foot door 22, and the defroster outlet passage 19 is fully closed by the defroster door 21. Only the conditioned air is blown out. In this vent mode, the combined 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 toward the vent outlet passage 17. Thereby, the ventilation resistance against the cool air mainstream flowing from the bypass passage 66 to the vent outlet 17 is kept to a minimum, and the maximum blowing performance from the vent outlet passage 17 is ensured.
[0047]
At the time of full cooling in the vent mode, 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 warm air passage 12 is fully closed and the bypass passage is fully opened. As a result, all the cool air cooled by the evaporator 5 passes through the bypass passage 66, flows smoothly toward the vent outlet passage 17 along the combined mode door 23, and is then blown out from the vent outlet passage 17.
[0048]
(2) Vent mode (air mix) See Fig. 8
During the air mixing in the vent mode, the air mixing door 62 is set above the lower end position. The vent foot door 22 and the defroster door 21 are set at the same position as in the vent mode (full cool). Further, the combined mode door 23 is also set at the same position as the vent mode (full cool) in order to ensure the maximum blowing performance from the vent blowing passage 17. Thereby, the mixed air of the cool air and the warm air is blown out from the vent outlet passage 17.
[0049]
(3) Bi-level mode (air mix) See FIG.
The bi-level mode is a mode in which cool air and warm air are mixed and blown from the vent outlet passage 17 and the foot outlet passage 15. In the bi-level mode, as shown in FIG. 9, the vent outlet passage 22 is half-opened by the vent foot door 22, the foot outlet passage 15 is half-opened, the defroster outlet passage 19 is fully closed by the defroster door 21, and the vent outlet passage 17 is closed. And the temperature-controlled air is blown out from the foot blowing passage 15. In the bi-level mode, the combined mode door 23 closes the first gate 25 so that the cool air and the warm 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.
[0050]
(4) Foot mode (full hot) See Fig. 10
The foot mode is a mode for heating the vehicle interior. In the foot mode, as shown in FIG. 10, the vent outlet passage 17 is fully closed and the foot outlet passage 15 is fully opened by the vent foot door 22, and the defroster outlet passage 19 is slightly opened by the defroster door 21, so that most of the warm air is A small amount of warm air is blown out from the foot outlet passage 15 and leaks from the defroster outlet passage 19. In this foot mode, the composite mode door 23 closes the first gate 25 located in the shortest flow path, and is set so that warm air can easily flow into the defroster outlet passage 19.
[0051]
(5) Defroster mode (full hot) See FIG.
The defroster mode is a mode for clearing the fog of the window on the front glass of the vehicle. In the defroster mode, as shown in FIG. 11, the defroster door 21 fully opens the defroster outlet passage 19 and the second gate 26 is completely closed, and the composite mode door 23 fully closes the first gate 25, and the defroster blowout is performed. Hot air is blown out only from the passage 19. In this case, since the second gate 26 is closed by the defroster door 21 and the first gate 25 is closed by the combined mode door 23, the conditioned air flows through the vent outlet passage 17 and the foot outlet passage 15. It does not flow, and the position of the vent foot door 22 may be anywhere.
[0052]
(6) Foot defroster mode (full hot) See FIG.
The foot defroster mode is a mode in which the interior of the vehicle front glass is cleared of fogging while heating the vehicle interior. In the foot defroster mode, as shown in FIG. 12, the vent outlet passage 17 is fully closed and the foot outlet passage 15 is fully opened by the vent foot door 22, and the defroster outlet passage 19 is half-opened by the defroster door 21, so that the foot outlet passage is opened. Warm air is blown out from 15 and the defroster blowing passage 19. In the foot defroster mode, the combined mode door 23 closes the first gate 25 located in the shortest flow path, and is set so that warm air can easily flow through the defroster outlet passage 19.
[0053]
Here, in the vehicle air conditioner of this embodiment, in all the modes (1) to (6), the conditioned air is set to always leak from the side vent outlet 10B. Specifically, as shown in FIG. 5, a side vent constant communication path 36 is defined in the air mix chamber 14 by a partition wall 35. The side vent communication path 36 is provided outside the range of rotation of the vent foot door 22 and is set so that it cannot be closed by the vent foot door 22. In this embodiment, the vent foot door 22 is provided with a notch at a position corresponding to the side vent always communicating path 36, so that the vent foot door 22 cannot close the side vent always communicating path 36. I have. Further, the combined mode and the defroster door 21 are also formed so as not to interfere with the side vent constantly communicating path 36.
[0054]
According to such a vehicle air conditioner, the following effects can be obtained.
[0055]
First, in the vicinity of the outlet 67 of the bypass passage 66 of the air mix chamber 14, a warm air guide portion 28 at a central portion in the vehicle width direction and warm air protruding from the warm air guide portion 28 to the side in the vehicle width direction. Since the hot air guide plate 27 including the diffusing portion 29 is provided, the hot air which tends to be deflected to both sides in the vehicle width direction by being pushed by the cold air is first guided to the center in the vehicle width direction by the hot air guide portion 28, and the center in the width direction is formed. A part of the guided warm air can be diffused to both sides in the vehicle width direction by the warm air diffusing portion 29. Therefore, the difference in the blowout temperature in the vehicle width direction can be reduced. That is, it is possible to provide a more suitable vehicle interior environment by making the blowing temperature in the vehicle width direction at the outlets 9, 10, and 11 more uniform.
[0056]
Further, since the shape of the hot air guide plate 27 can be changed relatively easily, there is also an effect that the uniformity of the blowing temperature can be easily adjusted.
[0057]
Further, since the warm air guide plate 27 guides and distributes a part of the warm air that has passed through the heater core 7 with respect to the cool air mainstream, the hot air guide plate 27 is connected to the vent outlet 10 where the amount of warm air tends to be small in the bilevel mode. It is possible to increase the amount of warm air and reduce the amount of warm air to the foot outlet 11 where the amount of warm air tends to increase. That is, the hot air guide plate 27 also has an additional effect of reducing the difference between the vent outlet temperature and the foot outlet temperature in the bi-level mode (upper and lower temperature difference).
[0058]
Secondly, since the hot air diffusion unit 29 is located at a position where the hot air diffusion unit 29 interferes with the outlet 67 of the bypass passage 66, the warm air diffusion unit 29 disturbs a part of the flow of the cool air main flow from the bypass passage 66. The cold air is well mixed, and the blowing temperature becomes more uniform in the vehicle width direction.
[0059]
Third, the first gate located in the shortest flow path from the outlet 13 of the warm air passage 12 to the entrance of the foot outlet passage 15 and the shortest flow path from the outlet 67 of the bypass passage 66 to the entrance of the vent outlet passage 17. When the shortest flow path is closed by the combined mode door 23 to provide the combined mode door 23 that opens and closes 25, the cool air and the warm air bypass the first gate 25 and go around to the long second gate 26. The length becomes longer, and the warm air and the cold air are more evenly mixed. Thereby, the temperature difference between the vent outlet 10 and the foot outlet 11 in the bilevel mode (upper / lower temperature difference) can be further reduced.
[0060]
Fourth, it is provided downstream of the combined mode door 23 and near the outlet 13 of the hot air passage 12 so as to extend laterally from the central portion in the vehicle width direction, so that the warm air from the hot air passage 12 is Since the hot air diffusion plate 33 that diffuses in the lateral direction is provided, the hot air diffusion plate 33 acts when the combined mode door 23 is opened, and it is possible to prevent the central portion in the vehicle width direction from becoming excessively hot air.
[0061]
That is, conventionally, when the shape of the hot air guide plate 27 is tuned with the composite mode door 23 closed, the hot air guide plate 27 is drawn to the center of the vehicle when the composite mode door 23 is opened. Shortly after the hot air was sufficiently diffused, the hot air was blown out, and there was excessive hot air in the center in the width direction.
[0062]
However, according to this embodiment, when the composite mode door 23 is opened, the warm air diffusion plate 33 diffuses the warm air biased toward the vehicle width direction center toward the vehicle width direction side. Can avoid excessive warm air. Thereby, the uniformity of the warm air in the width direction can be maintained both when the combined mode door 23 is opened and when it is closed.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a vehicle air conditioner according to an embodiment.
FIG. 2 is an exploded perspective view of a unit case of a temperature control unit of the vehicle air conditioner.
FIG. 3 is a perspective view showing a main part of the vehicle air conditioner.
FIG. 4 is a sectional view taken along the line SA-SA in FIG. 1;
FIG. 5 is a sectional view taken along line SB-SB in FIG. 1;
FIG. 6 is a top view near the vent outlet.
FIG. 7 is a schematic diagram showing the flow of conditioned air in a vent mode (during full cooling).
FIG. 8 is a diagram showing a flow of conditioned air in a vent mode (at the time of air mixing).
FIG. 9 is a diagram showing the flow of conditioned air in a bi-level mode (air mix).
FIG. 10 is a diagram showing a flow of conditioned air in a foot mode (full hot).
FIG. 11 is a diagram showing a flow of conditioned air in a differential mode (full hot).
FIG. 12 is a diagram showing a flow of conditioned air in a foot / defroster mode (full hot).
[Explanation of symbols]
1 Temperature control unit
2 Unit case
2a, 2b split case
3 Partition plate
5 Evaporator
6 Air mix door device
7 heater core
8 Inlet
9 Defroster outlet
10 Vent outlet
11 Foot outlet
12 Hot air passage
13 Hot air passage exit
14 Air Mix Chamber
15 Foot outlet passage
16 Entrance of foot outlet passage
17 Vent outlet passage
18 Entrance of vent outlet passage
19 Defroster outlet passage
20 Defroster outlet passage entrance
21 Defroster door
22 Bent foot door
23 Combined mode door
25 1st gate (gate)
26 Second Gate
27 Hot air guide plate
28 Hot air guide
29 Hot air diffuser
33 Hot air diffuser
34 Partition Wall
35 partition
36 Side vent continuous communication path
61 door case
62 Air Mix Door
63 Cold air inlet
64 Heater core side passage
65 Exit of heater core side passage
66 Bypass passage
67 Bypass passage exit

Claims (6)

An air mix door (62) is provided between the evaporator (5) and the heater core (7) for distributing and controlling the amount of cool air to be passed through the heater core (7) and the amount of cool air to bypass the heater core (7),
An air mix chamber (14) is formed downstream of the heater core (7) for mixing warm air that has passed through the heater core (7) and cool air that has bypassed the heater core (7),
In a vehicle air conditioner having a defroster outlet passage (19), a vent outlet passage (17) and a foot outlet passage (15) provided in the air mix chamber (14),
The central part in the width direction of the main flow of the cool air flowing from the bypass passage (66) toward the vent outlet passage (17) is blocked, and a part of the warm air that has passed through the heater core (7) is guided to the central part in the width direction. A hot air guide portion (28), and diffuses in the width direction the warm air projected from the hot air guide portion (28) in the width direction and guided along the hot air guide portion (28). An air conditioner for a vehicle, comprising: a hot air guide plate (27) including a hot air diffusion portion (29). The vehicle air conditioner according to claim 1,
The hot air guide plate (27) protrudes from the center in the width direction of the hot air guide portion (28) toward the downstream side of the cool air mainstream, and is divided in the width direction by the hot air guide portion (28). An air conditioner for a vehicle, comprising: a partition wall (34) for restricting the cold air from getting into each other and having a substantially T-shaped cross section. The vehicle air conditioner according to claim 1 or 2,
An air conditioner for a vehicle, wherein the hot air diffusing portion (29) of the hot air guide plate (27) is located at a position where the hot air diffusing portion (29) interferes with an outlet (67) of a bypass passage (66). The vehicle air conditioner according to any one of claims 1 to 3,
The air mix door (62) slides vertically across the bypass passage (66) and the heater core side passage (64),
A vertical hot air passage (12) is formed in a downstream portion of the heater core (7) to flow the warm air having passed through the heater core (7) upward and to flow therethrough, and an outlet of the warm air passage (12) is formed. (13) is provided at the outlet (67) of the bypass passage (66), and the confluence of the two outlets (13, 67) is set as an air mixing chamber (14) for mixing cold air and hot air.
A foot outlet passage (15) is disposed adjacent to an outlet (13) of the warm air passage (12) provided to the air mix chamber (14), and a vent outlet passage is provided above the foot outlet passage (15). (17) An air conditioner for a vehicle, wherein (17) is arranged adjacently. The vehicle air conditioner according to claim 4,
A foot outlet passage (15), a vent outlet passage (17), and a defroster outlet passage (19) are successively provided on the upper side of the outlet (13) of the warm air passage (12) upward in order.
In the air mix chamber (14), the shortest flow path from the outlet of the warm air passage (12) to the inlet of the foot blow passage (15) and the outlet of the bypass passage (66) to the vent blow passage (17). An air conditioner for a vehicle, comprising a compound mode door (23) capable of opening and closing a gate (25) located in a shortest flow path to an entrance. The vehicle air conditioner according to claim 5,
The hot air that diffuses the hot air from the hot air passage (12) from the center in the width direction to the side in the width direction in the downstream of the combined mode door (23) and near the outlet (13) of the hot air passage (12). A vehicle air conditioner comprising a diffusion plate (33).

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