JP2566001Y2 - Air conditioning unit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an air conditioning unit, and more particularly to a structure of an air mixing door provided in a unit case.

[0002]

2. Description of the Related Art In recent years, there has been a demand for downsizing of an air conditioner housed in an instrument panel of a vehicle in order to secure a passenger space of the vehicle or mount safety equipment such as an air bag.

On the other hand, in the conventional air conditioner, the ratio of the air passing through the heater core and the air bypassing the heater core is changed by controlling the opening of the air mix door. A large space is required between the evaporator and the heater core in order to secure the air conditioner, which is one of the factors that hinder miniaturization of the air conditioner.

[0004] This is the opposite, it is possible to narrow the space between the evaporator and the heater core by reducing the operating region of the air mix door, means that the turn size of the air conditioner can be reduced.

[0005] Therefore, a device for reducing the operating area of the air mix door by sliding the door body of the air mix door up and down has already been known (see Japanese Utility Model Laid-Open No. 3-1812).

[0006]

However, in the structure of the air-mix door disclosed in the above-mentioned reference, a single door body is slid up and down to provide a warm air passage passing through the heater core and a cool air passage bypassing the heater core. Therefore, the ratio between the cross-sectional area of the hot air passage and the cross-sectional area of the cool air passage must be necessarily equal.

For this reason, the maximum air volume (at full hot) flowing into the hot air passage is the maximum air volume (full air volume) flowing into the cold air passage.
Becomes equal to the cool time), the heater core because the air volume of hot air is reduced in comparison with the cold air that bypasses the heater core for ventilation resistance is large, not obtained a blowout air quantity required at the time of full-hot and the hot air There was a disadvantage that the cold air could not be mixed properly.

To solve this inconvenience, the cross section of the hot air passage may be made larger than the cross section of the cold air passage in consideration of the ventilation resistance of the heater core. For example, if the door area is adjusted to the cross-sectional area of the cold air passage, the hot air passage cannot be completely closed.On the contrary, if the door area is adjusted to the cross-sectional area of the hot air passage, part of the hot air passage is also closed when closing the cold air passage. The inconvenience of doing so occurs.

In view of the above problems, the present invention
In addition to adopting a sliding-type air mix door, the air volume of hot air is prevented from decreasing compared to the air volume of cold air .
It is an object of the present invention to provide an air-mixing door structure of an air conditioner that can appropriately close a hot air passage and a cold air passage even when a cross-sectional area of a hot air passage is larger than a cross-sectional area of a cold air passage.

[0010]

Means for Solving the Problems To achieve the above object, the invention is arranged in a unit case.
An evaporator that is provided on the downstream side of the evaporator, a warm air passage heater core Ru is disposed, said evaporator
A cold air passage provided alongside the hot air passage downstream of the heater ;
Adjust the air flow rate passing through the hot air passage and the cold air passage.
And an air mix door to save, wherein the hot air passage is
In an air conditioning unit having a larger cross-sectional area than a cold air passage , the air mixing door includes the cold air passage and the cold air passage.
Multiple door bodies sliding on the upstream side of the hot air passage
The air mix door closes the hot air passage.
During full cooling, the door bodies have minimum weight.
The warm air passage is closed by overlapping,
At the time of full hot when the door closes the cold air passage,
A plurality of door bodies overlap at the maximum overlap rate and the cold air passage
The air between the full cool and full hot
When the doors are open, the door bodies overlap at a predetermined overlap rate.
To open the hot air passage and the cold air passage at a predetermined ratio.
Interlocking mechanism for interlocking the plurality of door bodies so as to open
Certain to be equipped.

[0011]

Accordingly, an air filter formed from a plurality of door bodies is provided.
Doors, while changing the overlapping rate of the multiple door bodies
Because it can slide, it is cool air flow at full hot
When closing a road, increase the overlapping rate of multiple door bodies.
To reduce the area, and close the hot air passage at full cooling
Shiteso reduce the duplication rate of multiple of the door body in the case of busy
The area of the hot air passage can be increased
Air conditioning unit with an area larger than the cross-sectional area of the cold air passage
The above problem can be solved.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

Referring to FIGS. 1 to 5, a blower unit 2 is shown.
The structure of the air conditioner 1 according to the present invention, which includes a temperature control unit 3 and a mixing chamber 4, is shown.

The blower unit 2 has an inside / outside air switching box 5 in which an inside air introduction port 6 and an outside air introduction port 7 are formed. The inside / outside air switching box 5 is provided with air (not shown). An inside / outside air switching door for appropriately selecting between inside air and outside air is housed.

A blower (not shown) is disposed in a blower case 8 formed integrally with the inside / outside air switching box 5 at a lower portion thereof, and the air introduced from the inside / outside air introduction ports 6 and 7 by the rotation of the blower. Temperature control unit 3 from opening 9
To be sent to

An evaporator 15 is housed on the upstream side of the temperature control unit 3. The evaporator 15 is connected at least to a condenser (not shown), a compressor, a liquid tank, and an expansion valve to form a refrigerant circulation cycle.
The air passage introduced into the temperature control unit 3 is cooled so as to substantially cover the cross section of the passage.

On the downstream side of the evaporator 15, a hot air passage 17 in which a heater core 16 for reheating the air cooled by the evaporator 15 using the exhaust heat generated from the traveling engine is provided; Hot air passage 1
7 and a cold air passage 18 which bypasses the air passage 7. still,
A partition plate 19 is provided above the heater core 16 so that air flowing through the cold air passage 18 is not heated by the heater core 16.
Is provided.

Further, a mixing chamber 4 is arranged following the passages 17 and 18, and a foot outlet 21, a defrost outlet 22 and a vent outlet 23 are opened in the mix chamber 4. Each outlet 21 to 23
Are provided with a heater door, a differential door, and a vent door (not shown) for controlling the opening and closing of the outlets 21 to 23 in accordance with each mode such as heat, differential, and vent .

With the above configuration, the air cooled by the evaporator 15 is separated into air flowing into the hot air passage 17 and air flowing into the cold air passage 18 at a desired ratio by an air mixing door 30 described below. since thereby it is mixed with cold air Toka mix chamber 4 bypassing the warm air and the heater core 16 which is heated by the heater core 16, warm
It can blow conditioned air into the cabin.
You.

The air mixing door 30 is located rearward of the evaporator 15 and has a function of separating the air flowing into the hot air passage 17 and the air flowing into the cold air passage 18 at a desired ratio. In front of passage 18
It is provided in.

The air mix door 30 is constituted by, for example, two door bodies 32 and 33 . These two
The door bodies 32 and 33 are paired with each other in the temperature control unit case 14.
Rails 31a, 3 provided adjacent to the facing side inner wall
1b is slidably fitted into the rail portion 31 made of
By sliding in the direction crossing the air passage 17 and the cold air passage 18
I am able to do it.

To describe a more specific structure, the door body 33 is fitted into the rail 31b on the heater core 16 side.
The cold air passage 18 is formed so that the length in the sliding direction can be approximately closed. In the vicinity of the lower portion of the door body 33, a protrusion 33a is formed extending toward the hot air passage 17 toward the downstream side, and air flows from the hot air passage 17 to the cold air passage 18 during full hot. Has been prevented.

On the other hand, the door body 32 slides by being fitted into the rail 31a on the evaporator 15 side, so that the hot air passage 17 can be closed with some overlap between the door bodies 32 and 33. In addition, the length in the sliding direction is formed smaller than that of the other door body 33. A projection 32a is formed on the upper part of the door main body 32 and projects into the cold air passage 18 toward the downstream side.
Is a partition plate 19 provided at the upper end of the heater core 16 at the time of full cooling (the state shown in FIG. 2 in which the hot air passage 18 is fully closed) .
To prevent air from flowing from the cold air passage 18 side to the hot air passage 17 side, and at the time of full hot (the cold air passage 1).
7 is fully closed) as shown in FIG. 1) to prevent a gap from being formed between the case 14 and the inner wall of the case 14.

A pin 42 projecting toward the evaporator 15 is formed below the door body 32, and a pin 43 projecting toward the evaporator 15 is formed at a position where the door body 33 does not interfere with the door body 32. A door lever 35 described below is engaged with the pins 42 and 43 to link the door bodies 32 and 33.

The door lever 35 is connected to the temperature control unit case 1
4, a power transmission unit 37 that is rotatably supported by a rotating shaft 36 attached to the outside of the side wall and that transmits power from a drive motor or the like.
The power transmission portion 37 is extended substantially opposite to the power transmission portion 37 and inserted into the temperature control unit case 14, and the pins 42, 43
And a door operating section 38 connected to the door.

The power transmission portion 37 has a hole 40 at the distal end side, and is connected to the actuator via a rod (not shown).
Thus, for example, when the cold air passage 17 is moved in a direction to be opened, the power transmission unit 37 is rotated in the direction A shown in FIG.

On the other hand , the door operating portion 38 is rotated in the direction B shown in FIG. 4 with the rotation of the power transmission portion 37 in the direction A , and the sliding hole 4 in which the pin 42 of the door body 32 is locked.
4 and a sliding hole 45 in which the pin 43 of the door body 33 is locked.

The sliding hole 44 is provided with the B
When the pin 42 is pressed against the edge of the slide hole 44 with the rotation in the direction, the door body 32 has a long hole shape capable of sliding downward.

The sliding hole 45 is also provided in the door operating portion 3.
When the pin 43 is pressed against the edge of the sliding hole 45 with the rotation in the direction indicated by the arrow 8 in FIG.

Therefore, as the door operating portion 38 rotates in the direction B, the pin 42 of the door body 32 and the pin 43 of the door body 33 slide in the sliding holes 44 and 45 at the same time. , 43 in which the door body 32 and the door body 33 slide together.

[0031] With this configuration, in a state with the door lever 35 to the position of FIG. 4, the door main body 33 with the door body 32 as shown in FIG. 1 is slid to the uppermost end of the rail portion 31 is the protrusion 32a of the door body 32 The door body 32 and the door body 33
And the overlap ratio with the maximum, the projection 32a of the door body 32
And the door body 33, the cold air passage 18 is completely closed.
Therefore , a full hot state can be obtained.

When the door lever 35 is in the position shown in FIG. 5, the door main body 33 is connected to the rail as shown in FIG.
The door body 32 slides to the lowermost end of the portion 31 and
Slides to a position where the protrusion 32a of the door abuts against the partition plate 19 of the heater core 16, the door body 32 and the door
Since overlap rate between the main body 33 is minimized, because the door body 32 and the door body 33 fully closes the hot air passage 17, the full click
Control status can be obtained.

Further, as shown in FIG.
In the middle air-mix state at the time of cool, the door body 32
Has an opening between the upper wall of the temperature control unit case 14
And the door body 33 is a temperature control unit.
At the position where the opening is formed between the case 14 and the lower wall
Therefore, the air passing through the evaporator 15 is
Flow through the cold air passage 17 and the hot air passage 18
Therefore, an air mix state can be obtained. Ma
In addition, the state of the air mix is determined by the door bodies 32 and 33.
Fine adjustment of the position of the
It can be adjusted strangely.

[0034] Thus, when closing the cool air passage 18 to increase the overlap ratio of the door body 32, 33, can be set small overlap rate of the door body 32, 33 in the case of closing the warm air passage 17 , and inconvenience that warm air passage 17 that occurs when the cross-sectional area larger than the cross-sectional area of the cool air passage 18 of the warm air passage 17 is not completely closed, one warm air passage 17 when closing the cool air passage 18 There is no inconvenience that the part is also closed.

In addition, in the conventional structure,
The case where the door body of the door 30 has two pieces has been described.
However, it is not necessarily limited to this, and three or more sheets may be used.
It is a thing. The door lever 35 is also a cam type.
There is no limitation, and a gear or the like may be used instead.
You.

[0036]

[Effect of the invention] As described above, according to the invention, the door
Even if the main unit adopts a sliding air mix door,
In the air where the cross-sectional area of the air passage is larger than that of the cold air passage
Control unit, so the hot air volume is
Prevents the airflow resistance from decreasing compared to the volume of cold air
It is possible to obtain the required amount of blowing air even at full hot
In addition, it is possible to appropriately mix the hot air and the cold air.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an air conditioner showing a position of a door body at the time of full hot.

FIG. 2 is a cross-sectional view of the air conditioner showing a position of a door body during a full cool.

FIG. 3 is a cross-sectional view of the air conditioner illustrating a position of a door body during air mixing.

FIG. 4 is a vertical sectional view of the air conditioner showing the positions of the door body and the door drive mechanism at the time of full hot.

FIG. 5 is a vertical cross-sectional view of the air conditioner showing the positions of the door body and the door drive mechanism during full cooling.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Air conditioner 14 Temperature control unit case 15 Evaporator 16 Heater core 17 Hot air passage 18 Cold air passage 30 Air mix door 32 Door main body 33 Door main body 35 Door lever

Claims (1)

(57) [Scope of request for utility model registration] And Ebapore <br/> data which is arranged to 1. A within the unit case, provided downstream of the evaporator, a warm air passage heater core Ru are arranged, downstream of the evaporator
A cold air passage provided adjacent to the hot air passage;
And an air mixer that adjusts the proportion of airflow passing through the cold air passage.
And the hot air passage is greater than the cold air passage.
In the air conditioning unit having a large cross-sectional area , the air mixing door includes the cold air passage and the hot air passage.
Consists of multiple door bodies sliding on the upstream side of the road
The air mix door closes the hot air passage
During full cool, the multiple door bodies are
Overlap and close the hot air passage, the air mix door
When the hot air is closed to close the cold air passage,
Door body closes the cold air passage at the maximum overlap rate
Air mix between full cool and full hot
Sometimes, the plurality of door bodies overlap at a predetermined overlap rate.
Open the hot air passage and the cold air passage at a predetermined ratio
And an interlocking mechanism for interlocking the plurality of door bodies.
Air conditioning unit, characterized in that the.