JPH10329525A - Air conditioner for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioner for an automobile which can control the temperature difference of an upper/lower blow out wind at the compound mode time properly and improve the comfortableness and wind distribution property by the reduction of an aeration resistance. SOLUTION: In this air conditioner, a partition wall 11 extended vertically is formed in a mix zone 5 and a cold wind from a bypass passage B goes to a lower blow out port through a first passage 15a formed between this partition wall 11 and heater core 2 and the warm wind from a lower passage 4 goes to an upper chamber 10 through the second passage 15b formed between the partition wall 11 and case side wall Ca.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle, which can appropriately control a temperature difference between upper and lower blowing air in a combined mode to improve comfort.

[0002]

2. Description of the Related Art Some conventional air conditioners for automobiles are of a vertical type. As shown in FIG. 9, the vertical type air conditioner for a vehicle is provided such that an evaporator 1 and a heater core 2 are provided upright in a case C, and the air introduced from an inlet O is cooled by the evaporator 1. Then, the mixture is made to flow by the mixing door 3 in two vertical directions.

[0003] The lower air flow of the two divided air flows is:
The air is heated by the heater core 2 to become hot air and flows through the lower passage 4, and the upper air flow (cold air) flows through the bypass passage B that bypasses the heater core 2 and is mixed with the warm air in the mix zone 5. And reaches a predetermined temperature, and air is distributed from various outlets F (general term of vent outlet Fv, differential outlet Fd, and foot outlet Ff) toward the vehicle interior according to various air distribution modes, or The air is blown out with cold air or hot air without the mixing.

[0004] The temperature of the cool air or warm air blown from each outlet F is controlled by the position of the mix door 3.

[0005] Here, as is well known, a low-temperature low-pressure refrigerant decompressed by an expansion valve or the like during a cooling cycle flows through the inside thereof, and the air introduced therein is cooled by heat exchange with the refrigerant. Is what you do. Further, the "heater core" is one in which high-temperature engine cooling water flows inside, and heats the air introduced therein by heat exchange with the high-temperature engine cooling water.

The various air distribution modes include a vent mode (a mode in which cold air is blown to the upper body of the occupant), a bi-level mode (a mode in which warm air is blown to the upper body of the occupant and a warm air in the lower body, a so-called head-and-foot heat mode) and a defrost mode. (Mode for clearing cloudy windows), foot mode (mode for blowing warm air to the lower body of the occupant), and differential-foot mode (mode for blowing warm air to the lower body of the occupant while clearing cloudy windows).

In the vent mode and the defrost mode among these modes, since the cool air or the hot air is distributed to the upper part of the vehicle interior, the vent outlet Fv and the differential outlet Fd are:
It is preferable to provide the foot outlet Ff in the lower part of the case C because it is preferable to provide it in the upper part of the case C. In the case of the foot mode, warm air is distributed to the lower part in the vehicle interior.

Therefore, in the vertical type air conditioner for a vehicle, an upper air outlet which is a vent air outlet Fv or a differential air outlet Fd is provided at an upper portion of the case C, and a lower air outlet which is a foot air outlet Ff is provided at a lower portion. I have.

[0009]

However, in the vertical type air conditioner for a vehicle, the upper outlet is opened near the side where the cool air flows, and the lower outlet is heated by the heater core 2. In the combined mode in which cool air or hot air is blown from the upper and lower outlets, respectively, such as in bi-level mode or differential-foot mode, Temperature tends to increase.

That is, in the bi-level mode, the vent door Dv for opening and closing the vent outlet Fv and the foot door Df for opening and closing the foot outlet Ff are opened, and the cool air passing through the bypass passage B flows from the vent outlet Fv. The warm air heated by the heater core 2 is blown out from the foot outlet Ff.

As a result, as shown in FIG. 10, the temperature difference between the temperature of the cold air blown from the vent outlet Fv (broken line a2) and the temperature of the hot air blown from the foot outlet Ff (broken line b2) is It gets bigger, the head gets cold, the feet become hot, and comfort is impaired.

This is the same tendency in the differential foot mode.

FIG. 10 shows an automotive air conditioner with improved air mix properties. The air conditioner for an automobile has a vertical wall 6 on the downstream side of the heater core 2.
A foot outlet Ff is formed between the upright wall 6 and the side wall Ca of the case C, and the warm air heated by the heater core 2 and flowing through the lower passage 4 is once raised to the cool air side, and then passed through the bypass passage B. There are also some that collide with cold air to enhance the air mix.

However, in this case, since the upright wall 6 hinders the flow of the airflow particularly to the foot outlet, there is a possibility that the ventilation resistance may increase.

Also, in the combined mode, even if the cold air and the hot air collide with each other, one of them tends to fly or reflect the other depending on the air volume, and is not sufficiently mixed. There is a tendency to flow out of the outlet Ff, and the above-mentioned increase in the temperature difference between the upper and lower sides is not surely eliminated.

The present invention has been made to solve the above-mentioned problems of the prior art, and can appropriately control the temperature difference between the upper and lower blowing winds in the combined mode, improve the comfort, and improve the ventilation resistance. It is an object of the present invention to provide an air conditioner for a vehicle that can improve air distribution by reducing the air conditioner.

[0017]

According to a first aspect of the present invention, there is provided an air conditioner for a vehicle, wherein cooled air flowing through a case is converted into upper cold air and lower cold air by a mixing door. Separately, the lower cold air is heated through the heater core to generate hot air, and the upper cool air is guided to a bypass passage that bypasses the heater core, and an upper outlet including a differential outlet and a vent outlet is provided adjacent to the bypass passage. An opened upper chamber is provided, a lower outlet serving as a foot outlet is provided adjacent to the lower passage through which the warm air flows, and the cool air from the bypass passage and the warm air from the lower passage are mixed in a mix zone. In an air conditioner for an automobile, in which air is distributed to a vehicle interior from the various outlets, a partition wall extending vertically in the mix zone is formed, and The cool air from the bypass passage passes through the first passage formed between the wall and the heater core toward the lower outlet, and passes through the second passage formed between the partition wall and the case side wall. The warm air from the lower passage is directed to the upper chamber.

In this way, in the case of the composite mode,
Since the cool air passing through the bypass passage passes through the first passage toward the lower outlet and is mixed with the warm air passing through the lower passage, the temperature of the warm air blown out from the lower outlet decreases,
Also, some of the cold air is mixed with the mixed
Since the air passes through the passage toward the upper chamber, the temperature difference between the upper and lower sides is reduced, and the comfort in the combined mode is improved.

Further, since there is no wall or partition plate against which the hot air heated by the heater core or the cold air passing through the bypass passage collides, the ventilation resistance does not increase.

In the invention described in claim 2, the partition wall is provided with a communicating portion for guiding cool air to the upper chamber at an upper end of the partition wall, and a cool air control door is provided to open and close the communicating portion. And

In this way, the cool air passing through the bypass passage can be guided directly to the upper outlet, so that if cool power is desired, the cool air can be blown out very smoothly and quickly.

According to a third aspect of the present invention, the case has a first throttle portion projecting from both sides of the case at a lower end portion of the first passage so as to throttle the flowing air flow and increase the flow velocity. And

In this way, in the case of the composite mode,
When the cold air that has passed through the bypass passage passes through the first passage toward the lower outlet, it is throttled by the first throttle and the flow velocity is increased, so that it becomes easier to mix with the warm air that passes through the lower passage. Comfort is further improved.

Moreover, the cool air squeezed by the first throttle portion creates a calm state around the outlet of the first throttle portion, so that the warm air from the lower passage is directed upward by utilizing the calm state portion. This makes it easier to flow, which can also prevent an increase in the temperature difference between the upper and lower sides, thereby further improving the comfort in the combined mode.

Further, if the drawn portion protrudes from both sides of the case, the molding is simplified, and the rigidity of the unit case itself is improved.

According to a fourth aspect of the present invention, the case has a second throttle portion projecting from both sides of the case at the upper end of the second passage so as to draw the flowing airflow to the central portion. And

With this configuration, the warm air flowing upward by using the portion of the no-wind state around the outlet of the first throttle section is moved to the second air flow.
The narrow portion allows the air to be brought closer to the center of the second passage, so that the mixability between the cool air and the warm air is improved, the temperature of the cool air blown from the upper outlet is increased, and the difference between the air blown from above and below is increased. The temperature will be reduced and the comfort in combined mode will be further improved.

[0028]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an automotive air conditioner according to an embodiment of the present invention, FIG. 2 is a schematic sectional view taken along line 2-2 in FIG. 1, and FIG. 3 is taken along line 3-3 in FIG. FIG. 4 is a schematic sectional view, FIG. 4 to FIG. 7 are sectional views showing a door state in each mode of the embodiment, and FIG. 8 is a sectional view showing another embodiment of the present invention. Components common to those shown in FIGS. 9 and 11 are denoted by the same reference numerals, and description thereof is omitted.

The vertical type air conditioner for a vehicle according to the present embodiment shown in FIG. 1 is disposed in the front-rear direction of the vehicle.
It is taken in from inside or outside of the vehicle from a blower (not shown), and is introduced from the vehicle width direction (the direction perpendicular to the plane of FIG.
The air introduced therethrough is bent in the longitudinal direction of the vehicle in the case C, and is cooled through the evaporator 1.

In the case C, an upper chamber 10 having a vent outlet Fv and a differential outlet Fd is formed above the bypass passage B, and a partition wall 11 is formed from the lower end of the upper chamber 10 to the mix zone 5. Have been.

The partition wall 11 does not completely separate the bypass passage B or the mixing zone 5 from the upper chamber 10 side.
Are divided into front and rear (left and right in the figure). That is, it is provided so as to extend the center portion of the mix zone 5 up and down.

Here, "up and down" does not necessarily mean only vertical, but also includes a case where it is slightly inclined.

However, this partition wall 11 may be curved gently as shown to allow the cool air flowing down the bypass passage B to smoothly flow toward the mix zone 5 and the foot outlet Ff. preferable.

A bypass passage B is provided between the upper end of the partition wall 11 and the case C (the lower end of the upper chamber 10).
A communication section 12 is formed so that the upper chamber 10 and the upper chamber 10 communicate with each other. The formation of the communication portion 12 is for, for example, easily guiding the cool air flowing in the bypass passage B to the upper chamber 10 side.

The communicating portion 12 may be a simple through-hole depending on the shape of the partition wall 11 or the opening area thereof. However, preferably, a cold air control door 13 is provided here so as to be openable and closable, and is closed. It is desirable that the cool air flowing in the bypass passage B smoothly flow toward the mix zone 5 and the foot outlet Ff.

The cold air control door 13 operates a drive unit such as an actuator in response to a signal from a controller (not shown) to open and close by rotating the rotary shaft 13a. , The mixing door 3 or the various mode doors D (general term for the vent door Dv, the differential door Dd, and the foot door Df) via a link mechanism and may be configured to interlock with each other, or may operate independently.

When such a partition wall 11 is formed, a first passage 15a is formed between the partition wall 11 and the support wall 2a of the heater core 2, and the first passage 15a is formed between the partition wall 11 and the case C. The second passage 15b is formed between the second passage 15b and the side wall Ca.

Therefore, the cold air passing through the first passage 15a can be directed to the lower outlet, which is the foot outlet Ff, and the hot air mixed in the mix zone 5 through the second passage 15b. Wind vent outlet Fv
Or the upper outlet including the differential outlet Fd.

However, at the lower end of the first passage 15a according to the present embodiment, as shown in FIG.
A throttle portion 16a (indicated by a dashed line in FIG. 1) is formed, and a case C is formed at the upper end of the second passage 15b so that the flowing air flows toward the center as shown in FIG. A second throttle portion 16b (shown by a dashed line in FIG. 1) protruding from both sides is formed.

In this embodiment, the first throttle section 16a
The width of the foot outlet F is, as shown by the dashed line in FIG.
f so that the flowing air flow is smoothly guided to the foot outlet Ff.

Note that the first throttle unit 16a and the second throttle unit 16
There are various ways to form b, but it is preferable to form the unit case by deforming the case itself inward from both sides. That is, the first
Since the width of the passage 15a is the same as the width of the heater core 2 and the width of the unit case, when the case is injection-molded with resin, a part of the case is deformed so as to bulge inward. In this way, both squeezing sections 1
Forming the 6a allows the two narrowed portions 16a to be provided integrally with the unit case, so that there is an advantage that the molding is simplified and the rigidity of the unit case itself is also improved. Is also advantageous.

If the first throttle portion 16a is formed in the first passage 15a, for example, in the case of the composite mode, the bypass passage B
When the cool air that has passed through the first passage 15a toward the lower outlet, the flow is restricted, whereby the flow velocity is increased, and the cool air easily enters the flow of the warm air in the lower passage 4, and the mixability of the two is improved. As a result, the temperature difference between the upper and lower parts when the air is blown out in the vehicle interior is reduced, and the comfort in the vehicle interior is improved.

Further, since the width of the first throttle portion 16a is smaller than the width of the heater core 2, the cool air squeezed by the first throttle portion 16a keeps the vicinity of the outlet of the first throttle portion 16a in a windless state. Therefore, the warm air in the lower passage 4 that has passed through the heater core 2 easily flows upward by using the portion in the no-wind state, whereby the temperature difference between the upper and lower sides can be reduced.

Further, the second throttle portion 16b is provided in the second passage 15b.
Is formed, the warm air flowing along both sides of the second passage 15b flows upward by using the portion of the no-wind state generated by the first throttle portion 16a, and the hot air flows through the second throttle portion 16b through the second throttle portion 16b.
Since the air can be brought closer to the central portion of the passage 15b, the mixability of the cool air and the warm air is improved, the temperature of the cool air blown out from the upper outlet is reduced, and the upper and lower temperature difference can be reduced.

Next, the operation of the embodiment will be described. << Vent Mode >> The vent mode is a mode for cooling the vehicle interior. In this vent mode, as shown in FIG. 4, the vent door Dv is set to "open", the foot door Df is set to "closed", and the differential door Dd is set to "closed". The cool air control door 13 is set to open the communication section 12 by a signal from a controller (not shown).

In the vent mode, in the case of a full cool mode in which the whole amount of cold air is blown into the vehicle compartment without being heated,
The position of the mix door 3 is set at the lowermost F / C position in the vertical direction, and is set at the middle C position in the vertical direction when an intermediate temperature state is set.

In the case of the full cool mode, the supply of the hot water to the heater core 2 is stopped, and the mix door 3 is in the full cool position F / C for closing the entrance of the heater core 2 (the state shown by the dashed line in FIG. 4). Becomes

Thus, the air flow cooled by the evaporator 1 flows through the bypass passage B in its entirety, then goes almost straight to the vent outlet Fv, passes through the vent duct (not shown), and enters the vehicle interior. It is distributed to the wind.
Therefore, the ventilation resistance in this vent mode is reduced,
A large amount of cold air is guided into the passenger compartment to improve the cooling performance.

In the case of the intermediate temperature state, the mix door 3 is set at the intermediate C position, so that the air flow cooled by the evaporator 3 is partially bypassed through the upper part of the mix door 3. Vent outlet Fv from passage B
, The remaining airflow passes through the lower portion of the mix door 3 and is heated by the heater core 2, from the lower passage 4 to both the first passage 15 a and the second passage 15 b to the upper chamber 10, where It merges with the cool air from the bypass passage B, mixes and forms an airflow at a predetermined temperature, flows into the vent outlet Fv, and travels from the vent outlet Fv to the vehicle interior through a vent duct (not shown). . In this case, even if the partition wall 11 is formed, since both the passages 15a and 15b are used, there is no fear that the ventilation resistance increases. Further, the first throttle portion 16a and the second throttle portion 16b allow the warm air to rise appropriately, mix with the cool air, and blow out as a wind having a temperature corresponding to the position of the mix door.

<< Foot Mode >> The foot mode is a mode for heating the vehicle interior. In this mode, FIG.
, The vent door Dv is closed, and the foot door D
f is set to “open”, and the differential door Dd is set to “closed”.

In the foot mode, in the case of a full hot mode in which the entire amount of cold air from the evaporator 1 is heated by the heater core 2 and blown into the vehicle interior, the position of the mix door 3 is at the uppermost F / H position in the vertical direction. When the temperature is set to an intermediate temperature state, it is set to the middle C position in the vertical direction. The cold air control door 13 is
The communication unit 12 is closed by a signal from a controller (not shown).

In the case of the full hot mode, the air flow cooled by the evaporator 1 is entirely heated by the heater core 2 to become hot air, which flows directly into the foot outlet Ff through the lower passage 4. Then, air is distributed from a foot duct (not shown) toward the feet of the occupant. Therefore, the ventilation resistance in this mode is reduced, and the amount of warm air is large and the heating performance can be high.

In the case of the intermediate temperature state, the mix door 3 is at the intermediate C position, so that the air flow cooled by the evaporator 3 partially passes through the upper portion of the mix door 3 to control the cool air. The air flows along the door 13 and the partition wall 11, and flows from the bypass passage B to the first passage 15 a.
And flows into the foot outlet Ff from the lower passage 4.

However, the flow (solid arrow) of the cool air flowing through the first passage 15a is restricted by the first throttle portion 16a, thereby increasing the flow velocity. (Indicated by white arrows), and the mixability of the two is improved. In particular, in the foot mode, the mix door is adjusted to a position where the amount of warm air is relatively large, so that the amount of warm air flowing through the lower passage 4 is large. When the flow velocity is increased by the throttle section 16a, the mixability of the cool and hot air is improved. As a result, the temperature of the flow of hot air (hatched arrow) flowing into the foot outlet Ff can be reliably controlled to a predetermined temperature.

<Bi-level mode> In this mode, cool air is distributed from the vent outlet Fv through the vent duct toward the upper body of the occupant in the passenger compartment, and hot air is supplied to the foot outlet F.
In this mode, the air is distributed from f through the foot duct toward the feet of the occupant in the vehicle compartment.

In this mode, mix door 3
Is set at the middle position C in the vertical direction, and the vent door Dv
And the foot door Df is set to "open" and the differential door Dd
Is “closed”. The cold air control door 13 is connected to the normal communication passage 12.
Is set to close, but in some cases, it may be opened and closed slightly as shown by a dashed line or a two-dot chain line in the figure.

In this state, a part of the air flow cooled by the evaporator 1 flows through the upper portion of the mix door 3, and flows from the bypass passage B to the mix zone 5 through the first passage 15a, and the remainder. The air flow passes through the lower portion of the mix door 3 and is heated by the heater core 2 and reaches the mix zone 5 through the lower passage 4.

However, the flow of the cool air that has passed through the first passage 15a is restricted by the first throttle portion 16a, thereby increasing the flow velocity. , The mixability of both is improved,
As a result, the temperature of the warm air flowing into the foot outlet Ff decreases.

In the bi-level mode, since the vent outlet Fv is open, not all the cool air that has passed through the first passage 15a mixes with the warm air, and some of the cool air is Then, the light is reflected and sought to ascend through the second passage 15b.

In this case, since the flow of the warm air is narrowed by the first throttle portion 16a from the width of the heater core 2, a portion of the windless state is generated downstream of the first throttle portion 16a. Then, the warm air that has passed through the heater core 2 easily flows upward.

Therefore, the cool air that rises through the second passage 15b includes the warm air that is going to rise using the no-air portion along the second passage 15b.
It flows through passage 15b.

However, in the upper part of the second passage 15b, the second passage
Since the throttle portion 16b is provided, the warm air flowing along both sides of the second passage 15b is brought to the central portion by the second throttle portion 16b, mixed with the cool air flowing through the central portion, and The temperature of the cool air blown from the outlet rises.

As a result, the temperature of the warm air flowing into the foot outlet Ff decreases, and the temperature of the cool air blown out from the vent outlet Fv increases.
The temperature characteristics are as shown by the solid lines a1 and b1 in FIG. 10, and a comfortable bi-level state without a sense of incongruity is achieved.

In the bi-level mode, when the cool air control door 13 is moved upward as shown by the dashed line a in the figure to open the communication passage 12, a part of the cool air from the bypass passage B is removed. Since the air is directly introduced into the vent outlet Fv, a bi-level state where the upper side of the occupant tends to have a low temperature is obtained. On the other hand, when the cool air control door 13 is moved downward as shown by the two-dot chain line b in the figure to open the communication passage 12, the amount of cool air passing through the first passage 15a is reduced, so that the occupant's feet But a warm bi-level condition is obtained.

In other words, various bi-level states can be set by controlling not only the mix door 3 but also the cool air control door 13, and fine control of the bi-level becomes possible.

<< Defrost Mode >> The defrost mode is a mode for preventing and clearing the windshield and the like. In this mode, the vent door Dv is set to "close", the differential door Dd is set to "open", and the foot door Df is set to "close". The cool air control door 13 closes the communication section 12 in response to a signal from a controller (not shown).

When blowing out high-temperature air from the differential duct, the mixing door 3 is moved to the upper end, and when blowing out medium-temperature air, the mixing door 3 is set at the intermediate position.

In the case of this medium-temperature air, the warm air heated by the heater core 2 is mixed with the cool air that has passed through the bypass passage B and the first passage 15a in the same manner as described above, and reaches a predetermined temperature. The air is guided to a differential air outlet Fd, and is distributed to a windshield and the like via a differential duct.

<< Diff-Foot Mode >> This differential-foot mode is not specifically shown, but is, for example, a state in which the differential door Dd is opened (shown by a dashed line) in FIG. 7 at foot door Df
Is open (indicated by a dashed line).

In this manner, similarly to the case of the bi-level mode, the air flow in which the cool air and the hot air are mixed to reach the predetermined temperature flows through the second passage 15b and the differential air outlet F
This leads to a mode in which fogging of the window is prevented while heating the feet.

The present invention is not limited to the above-described embodiment, but can be variously modified without departing from the gist of the present invention. For example, in the above-described embodiment, the rotating shaft 13a of the cool air control door 13 is provided on the upstream side of the airflow flowing through the bypass passage, but may be provided on the downstream side in some cases.

Further, in the above-described embodiment, the cool air control door 13 is a cantilever type door, but the present invention is not limited to this, and as shown in FIG. The cold air control door 13 may be used. With this butterfly-type door, the door 13 functions as a guide for cold air or hot air, so that it is possible to provide a vehicle air conditioner that has less airflow resistance and that is comfortable in the combined mode.

[0073]

As described above, according to the first aspect of the present invention, in the combined mode, the cool air is directed to the lower outlet through the first passage, so that the temperature passing through the lower passage is reduced. The temperature of the wind drops, the temperature difference between the top and bottom can be reduced, and the comfort in the combined mode is improved. In addition, since the cool air mixed with the warm air passes through the second passage toward the upper chamber, the temperature difference between the upper and lower sides is also reduced, and the comfort in the combined mode is further improved. Furthermore, since there is no wall or partition plate against which the air flow collides, the ventilation resistance does not increase.

According to the second aspect of the present invention, the cool air passing through the bypass passage can be guided directly to the upper outlet, so that even when cooling power is desired, the cool air can be blown out very smoothly and quickly.

According to the third aspect of the present invention, in the combined mode, the cool air passing through the first passage is throttled by the first throttle portion to increase the flow velocity and to flow into the flow of warm air passing through the lower passage. , Making it easier to mix and further improving the comfort in combined mode.

Further, since the narrowed cold air generates a windless state around the outlet of the first throttle portion, the warm air in the lower passage easily flows upward, which can also prevent an increase in the temperature difference between the upper and lower parts. Thus, the comfort in the combined mode is further improved. Further, if the drawn portion protrudes from both sides of the case, the molding is simplified, and the rigidity of the unit case itself is improved.

According to the fourth aspect of the present invention, the warm air flowing upward by using the no-wind state is removed by the second throttle section to the second
Since it is possible to approach the central portion of the passage, the mixability of the cool air and the warm air is improved, the temperature difference between the upper and lower sides is reduced, and the comfort in the combined mode is further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a schematic sectional view taken along line 2-2 of FIG.

FIG. 3 is a schematic sectional view taken along line 3-3 in FIG.

FIG. 4 is a sectional view showing a door state in the vent mode according to the embodiment.

FIG. 5 is a sectional view showing a door state in the foot mode of the embodiment.

FIG. 6 is a cross-sectional view showing a door state in the bi-level mode of the embodiment.

FIG. 7 is a sectional view showing a door state in a defrost mode of the embodiment.

FIG. 8 is a cross-sectional view showing another embodiment of the present invention.

FIG. 9 is a schematic sectional view illustrating a conventional automotive air conditioner.

FIG. 10 is a diagram showing temperature control characteristics in a combined mode.

FIG. 11 is a schematic sectional view showing another conventional air conditioner for a vehicle.

[Explanation of symbols]

 2 ... heater core, 4 ... lower passage, 5 ... mix zone, 10 ... upper chamber, 11 ... partition wall, 12 ... communication part, 13 ... cold air control door, 15a ... first passage, 15b ... second passage, 16a ... second 1 throttle portion, 16b: second throttle portion, B: bypass passage, C: case, Ca: case side wall, F: various outlets, Fd: differential outlet, Fv: vent outlet, Ff: foot outlet.

Claims (4)

[Claims] 1. A cooled air flowing through a case (C) is divided into an upper cold air and a lower cold air by a mixing door (3), and the lower cold air is heated through a heater core (2) to produce hot air. It is led to a bypass passage (B) that flows by bypassing the heater core (2), and adjacent to the bypass passage (B),
An upper chamber (10) provided with an upper outlet comprising a differential outlet (Fd) and a vent outlet (Fv) is provided, and a foot outlet (Ff) is provided adjacent to a lower passage (4) through which the warm air flows. The lower air outlet is provided, and the cool air from the bypass passage (B) and the warm air from the lower passage (4) are mixed in the mixing zone (5), and the air is distributed into the passenger compartment from the various air outlets (F). A partition wall (11) extending up and down in the mix zone (5).
And the bypass passage passes through a first passage (15a) formed between the partition wall (11) and the heater core (2).
A second passage formed between the partition wall (11) and the case side wall (Ca) so that the cool air from (B) is directed to the lower outlet.
An air conditioner for an automobile, wherein warm air from the lower passage (4) is directed to the upper chamber (10) through (15b). 2. A communication part (12) for guiding the cool air to the upper chamber (10) at an upper end of the partition wall (11).
And a cold air control door to open and close the communication section (12).
The vehicle air conditioner according to claim 1, wherein (13) is provided. 3. The case (C) is connected to the first passage (15a).
3. A motor vehicle according to claim 1, further comprising a first throttle portion (16a) projecting from both sides of the case (C) at a lower end portion of the case so as to reduce a flowing air flow and increase a flow velocity. Air conditioner. 4. The case (C) is connected to the second passage (15b).
The air conditioner according to claim 3, wherein a second throttle portion (16b) projecting from both sides of the case (C) is provided at an upper end portion of the case so as to bring a flowing air flow to a central portion. apparatus.