JPS6181216A - Air conditioner for automobile - Google Patents

Abstract

PURPOSE:To obtain blowoff of cold air at a relatively low temperature by providing a partition board disposed in the downstream portion of a bypass passage through which air flows to bypass a heater core in a body case of an air conditioner so that a part of cold air can be directly introduced into a vent spit hole. CONSTITUTION:An automobile air conditioner comprises a body case 1 in which there are provided in sequence an in-car air-outside air change-over damper 3, electric blower 4, refrigerant evaporator 5 in the refrigerating cycle and heater core 6. Further, there is provided at the front end of the heater core 6 a temperature control damper 8 pivotally mounted for regulating the rate of amounts of warm air passing through the heater core 6 and cold air passing through a bypass passage 7 bypassing the heater core 6. In this case, the bypass passage 7 is provided downstream thereof with a partition board 10. Thus, a cold air passage 11 is defined between the partition board 10 and the body case 1 through which a part of cold air is directly introduced to a vent spit hole 16 in the by-level mode, and there is provided a by-level damper 12 which is opened and closed in the cold air passage 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement in the high-level health mode in an air mix type automobile air conditioner.

[Conventional technology]

Conventionally, when the high-level health mode is set in an automobile air conditioner, in order to obtain a comfortable temperature distribution of cold head and foot heat, the temperature of the air blown out of the vent outlet is lower than that of the heater outlet.

Various efforts have been made.

For example, according to Japanese Utility Model Publication No. 57-28653, an auxiliary cold air passage that connects a bypass passage downstream of a temperature control damper (air mix damper) and a vent outlet is provided, and a damper that opens and closes this is provided. , the auxiliary cold air passage is opened to lower the temperature of the air blown out from the vent outlet 1).

[Problem that the invention seeks to solve]

However, according to the above-mentioned publication, the auxiliary cold air passage is provided protruding from the outside of the main body case in which the heater core etc. are housed, which increases the external dimensions of the air conditioner and limits the installation space such as in automobiles. This will cause problems during installation.

Furthermore, since a new duct must be installed separately from the main body case, this results in a significant change in layout, resulting in a cost increase.

Therefore, the present invention has been made to achieve the technical problem of forming a cold air passage inside the main body case in which the heater core is housed, in order to improve the temperature distribution in the high-level health mode.

[Means for solving problems]

In order to achieve the above-mentioned technical problem, the present invention has been made to increase the air volume ratio between the hot air passing through a heater core disposed inside the main body case and the cold air passing through a bypass path provided on the side of the heater core. In the automobile air conditioner, the air conditioner has a temperature control damper to control, and is configured to control the temperature of the air blown out from the vent and the heater outlet according to the opening degree of the temperature control damper. A partition plate that partitions the heater core and the main body case is provided on the downstream side of the path, and between the partition plate and the Mii main body case, a part of the cold air is directly guided to the GENT outlet during the bilevel mode. A technical means is adopted in which a passage is formed and a bilevel damper is provided to open and close the cold air passage.

[Effect]

By adopting the above technical means, a partition plate is provided inside the main body case in which the heater core is housed on the downstream side of the bypass path, and a cold air passage is formed by this partition plate, so that a bilevel By opening the GJ and bilevel damper in the mode, a part of the cold air that has passed through the bypass passage is introduced into the cold air passage, and is guided rectangularly to the GENT outlet [-1] without mixing with the warm air that has passed through the heater core. It will be destroyed. Therefore, the temperature of the air blown into the vehicle interior from the Ghent outlet 1-1 in the high-level health mode can be lower than the temperature of the air blown out from the heater outlet.

In addition, if the opening degree of the bilevel damper can be set to an appropriate position, the amount of air flow to the vent outlet can be adjusted appropriately, and compared to when the bilevel damper is fully opened, the vent outlet Also, the temperature of the air blown out from the heater outlet can be reduced.

〔Effect of the invention〕

As described above, according to the present invention, a cold air passage can be formed by disposing the partition plate and the bilevel damper on the downstream side of the bypass passage in the main body case.
Therefore, there is an effect that the temperature difference between the upper and lower sides of the blown air at high level can be made suitable without significantly changing the external shape of the main body case.

In other words, the automotive air conditioner of the present invention has the effect of being extremely practical because it can achieve a suitable Suita temperature distribution in high-level health mode without reducing the ease of assembly into a vehicle, and at a low cost. There is.

〔Example〕

The present invention will be described below based on embodiments shown in the drawings. 1st
The figure shows the internal structure of the main body case 1 made of resin.
The outside air inlet 1a and the inside air inlet 1b are opened, and on the downstream side there are a front seat heater outlet 21 that blows warm air toward the occupant's feet, and a vent outlet that blows cool air toward the upper body of the occupant. 16. A defroster outlet 18 is opened to blow out warm air onto the windshield of an automobile.

Inside this main body case 1, the above-mentioned internal and external air introductions 1a and 1b are provided.
An internal/external air switching damper 3 is provided to switch between opening and closing, and an electric blower 4 is provided downstream of the damper 3 for blowing air sucked in from the two groove inlets 1a, 1b downstream. Further downstream of this, an evaporator 5 for the refrigerant of the refrigeration cycle and a heater core 6 whose heat source is automobile engine cooling water are arranged.

This heater taco°? 6 is disposed in the main body case 1 so as to face parallel to a bypass passage 7 provided on the side thereof, and is disposed orthogonal to the evaporator 5. heater core 6
A temperature control damper 8 is rotatably provided at the front end of the
As shown in FIG. 1, this temperature control damper 8 can have any opening degree selected from a MAX cool (maximum cooling position) 8a to a MAX hot (maximum heating position) 8b, and the temperature control damper 8 can be used to connect warm air passing through the heater core 6 to a bypass path. The temperature of the blown air is adjusted by adjusting the air volume ratio with the cold air passing through the air filter 7.

On the downstream side of the bypass passage 7, a partition plate 10 is provided between the heater core 6 and the main body case 1 by integral molding with the main body case. Therefore, downstream of the bypass passage 7 by this partition plate IO, there is a mixing chamber where the cold air that has passed through the bypass passage 7 and the warm air that has passed through the heater core 6 are mixed, and a cold air where only the cold air that has passed through the bypass passage 7 is introduced. A passage 1) is formed. At the downstream end of the cold air passage 1), there is a first opening 1)a communicating with the vent outlet 16.

A second opening 1)b communicating with the mixing chamber 9 is provided, and a piereher damper 12 for opening and closing the openings ILa and Ilb is also provided. .

This high level damper 12 has a m l opening] 1
Any opening degree between the fully closed position 12a of a and the fully closed position of the second opening tib can be selected.

Further, downstream of the mixing chamber 9, an outlet switching damper 13 is configured to selectively open and close a cold air inlet 14 and a hot air inlet 15. A hot air passage 19 is formed downstream of the hot air inlet 15 by a partition wall 17 integrally formed with the main body case 1 . This hot air passage 19 includes a heater outlet 2
A defroster damper 20 is provided to selectively open and close an opening for introducing hot air into the defroster air outlet 1 and the defroster outlet. The main body case 1 having the above-mentioned internal configuration is arranged in a space on the back side of an instrument panel (not shown) so as to form a ventilation path from the passenger seat to the center of the instrument panel.

FIG. 2 shows an operation panel 30 of the automotive air conditioner according to this embodiment, in which a mode switching lever 31 is connected to the outlet switching damper 13, the high-speed hell damper 12, and the defroster damper 20 via cables and links (not shown). , Vent Mode (■ENT), Pyre Hell Mode (BI
-LEVEL), heater mode (HEAT), defroster mode (DEF), and defroster/pyreher mode (DBFB/L) can be selected.

32 is a temperature control lever connected to the temperature control damper 3 via a link or the like (not shown), and is operated from the maximum cooling position (C00L position in Fig. 2) to the maximum heating position (WA in Fig. 2).
RM position), and depending on the operating position, the temperature control Danha 8 can be operated from MAX Cool 8a to MAX Cool 8a.
Continuously changes between hot 8b.

33 is an inside/outside air switching lever connected to the inside/outside air switching damper 3 via a link or cable (not shown);
is a blower switch for adjusting the rotational speed of the electric blower 4, and the air blowing amount can be adjusted in three stages: low speed, medium speed, and high speed. Further, 35 is an air conditioner switch for driving a compressor of a refrigeration cycle driven by an automobile engine (not shown).

Next, the operation of this embodiment having the above configuration will be explained.

(1) Vent mode When the air conditioner switch 35 and the blower switch 34 are turned on, the compressor of the refrigeration cycle is driven, the refrigeration cycle circulates, and the evaporator 5 cools the air blown by the electric blower 4 and turns it into cold air. When the mode switching lever 31 is set to the vent mode, the pile hell damper 12 fully closes the first opening 1)a, and the outlet switching damper 13 fully closes the hot air inlet, as shown in FIG. . Therefore, by appropriately operating the temperature control damper 8, the evaporator 5
A part of the cold air cooled by is introduced into the mixing chamber 9 through the bypass path 7, and the rest is heated as it passes through the heater core 6 and becomes warm air, which is uniformly distributed perpendicularly to the cold air in the mixing chamber. The air is mixed, brought to a predetermined temperature, passes through the cold air inlet 14, and is blown out from the vent outlet 16 into the vehicle interior. In this case, the partition plate IO and the partition wall 17 serve as air guide plates. In this case, if the temperature control lever 32 is switched to the maximum cooling position, the temperature control damper 8
is switched to the MAX COOL 8aL position, and the cold air cooled by the evaporator 5 is blown out into the vehicle interior from the vent outlet 16 through the bypass path without being heated by the heater core 6.

In addition, by stopping the compressor of the refrigeration cycle in the intermediate temperature range during spring and autumn and stopping the cooling action by the evaporator 5, the ventilation mode by introducing outside air can be changed to the vent outlet 1.
6 can be used.

(2) Heater mode When the mode switching lever 31 is operated to the heater mode position, the bilevel damper 12 moves to the position where the first opening 1)a is closed, and the outlet switching damper 13 moves the hot air inlet 15 to the fully open position. , the defroster damper 20 switches the openings of the 18 defroster outlets to slightly open positions, as shown by solid lines in FIG. Therefore, the warm air heated by the heater core 6 is blown out from the heater outlet 21 towards the feet of the occupant, and from the defroster outlet 18.
A small amount of warm air is blown towards the windshield.

(3) Defroster mode When the mode switching lever 20 is switched to the defroster mode, the defroster damper 20 changes from the heater mode state.
As shown by the dashed line in FIG. 4, the openings of the 21 heater outlets are switched to a slightly open position. Therefore, most of the warm air heated by the heater is blown out from the defroster outlet 18 and a portion is blown out from the heater outlet 21.

(4) Defroster standby level mode mode 1'9] When the ti lever 31 is switched to the defroster standby level mode, the bilevel damper I2 is in the fully closed position of the first opening 1)a, and the outlet switching damper 13 is in the position of the cold air. The defroster damper 20 is placed at an intermediate position between the inlet 13 and the hot air inlet 15, and the defroster damper 20 is switched to a position slightly open from the opening on the heater outlet 21 side.

The cold air and the hot air are mixed in the mixing chamber 9 to reach a predetermined air temperature, and a portion of the air is blown out from the vent outlet 16 toward the occupant's head and thorax, and most of the remaining air is , from the defroster outlet, and a part of it from the heater outlet 21
Each is blown out from the

In this case, although the cold air and hot air are mixed uniformly in the mixing chamber 9, the cold air in the cold air passage is mixed in the second stream downstream of the mixing chamber 9.
Since the air flows in through the opening, the temperature of the air blown out from the vent outlet 16 is lower than the temperature of the air blown out from the defroster outlet 18 and the heater outlet 21 . The temperature difference in this case can be adjusted to an appropriate state by rotating the temperature control damper 8 by appropriately operating the temperature control lever.

(5) Bi-level mode When the mode switching lever 31 is switched to the bi-level mode position, the bi-level damper 12 can be moved to any position between the first opening 1) a and the second opening 1) b. The outlet switching damper 13 is switched to an intermediate position between the cold air inlet 14 and the hot air inlet 15, and the defroster damper 20 is switched to a position where the opening on the defroster outlet 18 side is slightly opened.

In addition, as the mode switching lever is operated from the A position to the 8th position in FIG.
It changes continuously from the vicinity of the opening 1) a to the vicinity of the second opening 1) b.

Therefore, the cold air and the hot air are uniformly mixed in the mixing chamber 9, and a part of the cold air is introduced from the cold air inlet 13 to the vent outlet 16, and most of the remaining air is introduced from the heater outlet 20, and the remaining part is introduced from the heater outlet 20. portions are blown out from the defroster outlet 18, respectively. At this time, in addition to the above-mentioned mixed air, the cold air in the cold air passage ll is directly introduced into the vent outlet 16 from the first opening 1) a, so that it is blown out from the vent outlet 16. The air temperature is, for example, 1
The temperature can be as low as 0 to 30°C. Note that the temperature difference between the air blown out from the vent outlet 16 and the heater outlet 21 can be freely adjusted by adjusting the opening degree of the bilevel damper 12.

(I4) That is, the closer the bilevel damper 12 is to the second opening ttb, the lower the temperature of the air blown out from the vent outlet 16 becomes, and the larger the temperature difference becomes. Part 1) The closer to a, the vent outlet 16
, there is no difference in the temperature of the air blown out from the heater outlet 21.

Therefore, according to this embodiment, in the high level moat, the temperature difference between the air blown out from the vent outlet 16 and the heater outlet 21 can be selected from a very wide range from almost the same temperature to a considerable temperature difference. This allows passengers to obtain the desired temperature difference between the upper and lower sides.

Further, according to this embodiment, the partition plate 10 is integrally molded with the main body case 1 inside the main body case, so it can be manufactured easily.Moreover, since the bilevel damper 12 is also housed inside the main body case 1, the partition plate 10 can be easily manufactured. Since the case 1 has the same external shape as the conventional one, the main case 1 can be easily installed in a narrow space behind the instrument panel without requiring any special measures. Can be attached to.

Furthermore, in this embodiment, since the heater core 6 is disposed so as to face parallel to the bypass passage 7, the cold air that has passed through the bypass passage 7 and the warm air that has passed through the heater core 6 are mixed in the mixing chamber 9. Since they collide perpendicularly to each other, they are excellent in making the mixing of cold air and hot air uniform.

Note that the present invention is not limited to the above-described embodiments, and various modifications as described below are possible.

(]) Although the opening degree of the high level damper 2 is continuously changed, it may be opened and closed intermittently.

(2) The bilevel damper 12 may be provided at the upstream end of the cold air passage or in the middle thereof.

(3) In addition to the above, the heater core 6 may be provided with its air suction surface facing the evaporator 5.

(4) The present invention can be applied to a heating device that does not have the evaporator 5 in the same way.

[Brief explanation of the drawing]

The drawings all show embodiments of the present invention, and FIG. 1 is a schematic sectional view showing the internal structure of the main body case of the present automobile air conditioner,
The figure shows the operation of this automotive air conditioner (plan view of the flannel, 3rd
Figures 4, 5, and 6 show the main body in normal mode, heater (differential I'J star) mode, defroster high level mode, and normal mode, respectively.
- FIG. 6 is a schematic cross-sectional view showing the operation state of each damper inside the space. 1... Main body case, 5... Evaporator, 6... Heater core. 7... Bypass path, 8... Temperature control damper, lO.
... Partition i, 1) ... Cold air passage 312 ... Bilevel damper.

Claims (2)

[Claims] (1) It has a temperature control damper that controls the air volume ratio of warm air passing through a heater core disposed inside the main body case and cold air passing through a bypass path provided on the side of the heater core, and In an automotive air conditioner configured to control the temperature of air blown out from a vent outlet and a heater outlet according to the opening degree of a control damper, the heater core and the main body case are provided on the downstream side of the bypass path. A partition plate is provided for partitioning, a cold air passage is formed between the partition plate and the main body case to directly guide a part of the cold air to the vent outlet in a bilevel mode, and a bilevel damper is provided for opening and closing the cold air passage. An air conditioner for an automobile, characterized in that: (2) The automobile air conditioner according to claim 1, wherein the bilevel damper is configured to continuously change its opening degree.