JPH0352163Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an air conditioner for automobiles that has sufficient heating capacity and has low ventilation resistance during cooling.

(Prior Art) Generally, an air conditioner for an automobile is composed of an intake unit 1, a cooler unit 2, and a heater unit 3, as shown in FIG.

The intake unit 1 has an inside air intake 4 that takes in the air inside the vehicle, and an outside air intake 5 that takes in the air outside the vehicle, and an intake door 6 selectively opens and closes these intakes 4 and 5. It's getting old. In addition, there is a fan 7 inside the intake unit 1.
A fan motor M for rotationally driving the fan 7 is installed, and as the fan 7 rotates, air is absorbed from the inside and outside air intake ports 4 and 5 and blown in the direction of the cooler unit 2.

An evaporator 8 is built into the cooler unit 2, and the liquid refrigerant sent through the cooling cycle conduit 9 is atomized through the expansion valve 10, and the atomized refrigerant is vaporized to pass through the evaporator 8. It is designed to cool the air by removing the heat of vaporization from the air.

Inside the heater unit 3, a heater core 11, through which engine cooling water circulates and heats the air passing therethrough, is installed so as to form a bypass passage 12, which is an air flow passage bypassing the heater core 11. A mixer door 13 is rotatably mounted on the upstream side of the heater core 11 in the air flow direction. The mixer door 13 is designed to adjust the ratio of the amount of air passing through the heater core 11 and the amount of air passing through the detour 12, thereby adjusting the temperature of the air distributed into the vehicle interior.

Further, on the downstream side of the heater core 11 and the detour path 12, various air distribution duct outlets are formed, such as a differential duct outlet 14, a vent duct outlet 15, and a foot duct outlet 16. These various air distribution duct outlets 14, 15, and 16 are connected to various air distribution ducts (not shown), through which air outlets installed at various positions in the vehicle interior can be distributed according to the occupant's preference. It is becoming like the wind.

The differential air outlet 14 is an air outlet for distributing air along the inner surface of the windshield, and the differential door 17 is used to control the air distribution state.
is provided. The vent duct outlet 15
is an outlet for distributing air toward the upper body of the occupant, and a vent door 18 is provided to control the air distribution state. The foot duct outlet 16 is an outlet for distributing air to the feet of the occupant, and a foot door 19 is provided to control the air distribution state.

(Problems to be Solved by the Invention) However, in such an air conditioner for an automobile, as shown in FIG. When all the air that has passed through the unit 2 and has been cooled is distributed into the vehicle interior through the vent duct outlet 15, the cooling air flows in a meandering manner as shown by arrow C within the heater unit 3. Increased ventilation resistance has been a problem. This kind of inconvenience is a particularly important problem in automotive air conditioners that are designed for cold regions and have two heater cores installed in series, as shown in Utility Model Application Publication No. 51-55, 547. Ta. In other words, if two heater cores are installed in a heater unit installed in a limited space, the bypass path 1 shown in FIG.
This has the disadvantage that the area of the passage 2 has to become increasingly narrow, and the ventilation resistance during cooling increases.

The present invention has been made in view of the above circumstances, and aims to provide an air conditioner for an automobile that has improved heating capacity and reduced ventilation resistance during cooling.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a built-in heater core that heats the passing air, and supplies temperature-controlled air to the vehicle interior by passing through or bypassing the heater core. In an air conditioner for an automobile having a heater unit provided with outlets for various air distribution ducts for distributing air to and a bypass passage through which the air flow bypassing the heater core goes straight, and an inflow side mix door and a discharge side mix door are provided at a communication opening between the accommodation recess in which the heater core is accommodated and the bypass passage. It is characterized in that the amount of air passing through the heater core and the bypass path is adjusted by the movement of both the mixer doors.

(Function) According to the present invention which employs such a means, during cooling, the cold air goes straight through the bypass path and is distributed throughout the vehicle interior from the outlets for various air distribution ducts, thereby significantly reducing ventilation resistance. Can be reduced. Therefore,
Not only can a sufficient amount of cool air be distributed, but it also contributes to noise reduction. In addition, during heating, the inflow side mix door and the discharge side mix door open the communication openings, and the air flowing through the heater unit is made to make a U-turn in the U-turn passage, so that it passes through the heater core twice. Air is heated in two stages, significantly increasing heating capacity. Therefore,
It can also be used as an air conditioner for air vehicles designed for cold regions.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a schematic sectional view of an air conditioner for an automobile showing an embodiment of the present invention, FIG. 2 is a schematic sectional view of an air conditioner for an automobile according to another embodiment, and FIG.
The same reference numerals are given to members common to those shown in the figures, and some explanations thereof will be omitted.

In the embodiment shown in FIG.
A housing recess 33 is formed therein to accommodate a long-sized heater core 31 such that a U-turn passage 32 is formed at the bottom. This accommodation recess 33
communicates via a communication opening 35 with a bypass passage 34 configured such that the cold air passing through the cooler unit 2 passes straight through.

An inlet mix door 36 is attached to the communication opening 35 on the upstream side of the air flow, and a discharge mix door 37 is attached on the downstream side of the air flow. These mixer doors 36, 37 are connected to the heater core 31.
It is designed to rotate around rotation shafts 38 and 39 located approximately at the center of the . These mix doors 36 and 37 are interlocked and rotated at the same time.
At position A (full hot position) in the figure, the air flowing inside the heater unit 30 is as shown by arrow D.
Make a U-turn, pass through the heater core 31 twice to heat it, and at position B (full cool position) in the figure,
The cooling air that has passed through the cooler unit 2 is directed straight through the bypass passage 34 as shown by arrow E and is blown out from the vent duct outlet 15. Further, the mix doors 36 and 37 can also be set at intermediate positions between positions A and B in the figure. In this case, cold air and warm air will be mixed appropriately.

Note that the present invention is not limited to the embodiment shown in FIG. 1; for example, as shown in FIG.
The inflow side mix door 36a and the discharge side mix door 37a are rotatable about the same rotation axis 38a,
The rotation shaft 38a may be movable in the direction across the bypass path 34 (F in the figure). In the case of this embodiment, when the rotation shaft 38a is moved upward and the mix doors 36a, 37a are rotated to the A position, the full hot position is reached, and when the rotation shaft 38a is moved downward, the mix doors 36a,
When 37a is rotated to position B, it becomes the full cool position. Of course, it is also possible to use a position intermediate between these A and B positions.

This embodiment also provides the same effects as the embodiments described above.

(Effects of the invention) As described above, according to the present invention, there is provided a housing recess for accommodating the heater core so that a U-turn passage is formed in the heater unit, and an air flow that bypasses the heater core. forming a bypass passage through which the heater core is accommodated, and a communication opening between the accommodation recess in which the heater core is accommodated and the bypass passage;
An inlet mix door and a discharge mix door are installed, and the amount of air passing through the heater core and bypass path is adjusted by moving the mix doors, which significantly improves heating performance and reduces ventilation resistance during cooling. This has the excellent effect of reducing the amount of cooling air and providing a comfortable and sufficient cooling air distribution for the passengers.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of an air conditioner for an automobile showing an embodiment of the present invention, FIG. 2 is a schematic sectional view of an air conditioner for an automobile according to another embodiment, and FIG.
FIG. 2 is a schematic cross-sectional view of a conventional automobile air conditioner. 3, 30...Heater unit, 31...Heater core, 32...U-turn passage, 33...Accommodation recess, 34...Bypass path, 35...Communication opening,
36, 36a... Inflow side mix door, 37, 3
7a...Discharge side mix door.

Claims (1)

[Scope of utility model registration request] It has a built-in heater core that heats the air passing through it.
In an air conditioner for an automobile having a heater unit provided with various air distribution duct outlets for distributing temperature-controlled air into the vehicle interior through or around the heater core, A housing recess 33 that accommodates the heater core 31 is formed so that a U-turn passage 32 is formed through which air passes through the heater core 31 twice, and a bypass passage 34 through which the air flow bypassing the heater core 31 goes straight. An inflow side mix door 36 is formed in the communication opening 35 between the accommodation recess 33 in which the heater core 31 is accommodated and the bypass path 34.
36a and discharge side mix doors 37, 37a, and the amount of air passing through the heater core 31 and the bypass path 34 is adjusted by moving the mix doors.