JPH07315032A - Heater unit for automobile air conditioner - Google Patents

Abstract

PURPOSE:To prevent an uncomfortable feeling due to sunlight and laps chilling by splitting a ventilation flue, using a partition wall with communicating holes, and by closing and communicating each diffuser and the ventilation flue to provide a difference in air temperature from a side and a front differential gear diffuser. CONSTITUTION:A partition wall 15 having communicating holes 60 upperstream and downstream from a heater core 13 splits into an upper and a lower unit 11, 12 having detours 14a, 14b. Vent and foot diffusers 21, 51 for a driver's upper part of the body and legs are communicated to upper and lower mixing chambers 20a, 20b. Front and side differential gear diffusers 41, 31 for moving cloudiness at the central part and the side parts of a windshield are provided between the communicating hole 60 and the diffuser 21. Control is made by means of each door 22, 32, 52 for vent, differential gear, and foot. Conditioned air in the lower mixing chamber 20b is lead to temperature higher than air flow in the upper mixing chamber 20a in a differential gear foot mode. The diffuser 41 is placed nearby the communicating hole 60. Thus temperature difference is provided to air from the side and the front differential gear diffuser 31, 41 to prevent uncomfortable feeling and chilled knees due to sunlight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner heater having a function of eliminating discomfort in the head due to sunlight while preventing knee cold. Regarding the unit.

[0002]

2. Description of the Related Art When driving in sunny weather in the cold season, the synergistic effect of sunlight and heating may cause the face facing the window to become too warm, causing discomfort.

Therefore, in a conventional vehicle air conditioner in which the conditioned air blown from the vent outlet and the conditioned air blown from the foot outlet are independently controlled, the diff outlet and the foot outlet are opened. Differential foot mode (D /
In F), the temperature of the conditioned air is lowered to eliminate discomfort in the head.

[0004]

However, when the temperature is lowered in the D / F mode and cold air is blown out, the temperature of the conditioned air blown from the diff outlets flowing down into the passenger compartment and guided to the occupants' knees and feet. May cause the passengers to feel a cold knee.

Therefore, in order to prevent the chill of the knee while eliminating the discomfort of the head, the temperature setting lever must be frequently operated, and it cannot bear the complexity.

The present invention has been made in view of the above problems of the prior art, and is a heater unit for an air conditioner for an automobile capable of eliminating discomfort due to sunlight while preventing knee cold. The purpose is to provide.

[0007]

In order to achieve the above object, the present invention provides a detour path that bypasses the heater core at both ends of the heater core that heats the air introduced into the casing. The airflow flowing out of the heater core is divided into two substantially equal parts, and partition walls are provided so as to flow down independently of each other, thereby forming an upper unit and a lower unit in the casing, and the heater core of each unit. In a heater unit of an air conditioner for an automobile, each of which is provided with a mix door for controlling a ratio of air flowing to the heater core side and the detour side on a front surface of the upper unit and the lower unit in the partition wall. In front of the upper unit, with a vent hole that opens conditioned air toward the upper body of the occupant. A front differential outlet that is provided so as to communicate with the upper mixing chamber that is provided on the downstream side of the heater core and that clears the inner surface of the central portion of the windshield adjacent to the front communication hole in the upper unit, A side differential outlet for clearing the inner surface of the side portion is provided so as to be located between the vent outlet and the front differential outlet, and a foot outlet for blowing out conditioned air toward the feet of an occupant is provided in the heater core. A diff foot that is provided so as to communicate with a lower mixing chamber that is provided on the downstream side, has a diff door that opens and closes the side diff outlet and the front diff outlet, and has a foot door that opens and closes the foot outlet. In the mode operation, the temperature is higher than the temperature of the air flowing through the upper mixing chamber, and is controlled by the mix door. A heater for an air conditioner for an automobile, characterized in that the front differential outlet and the communication hole are arranged close to each other so that conditioned air in the lower mixing chamber is guided from the communication hole to the front differential outlet. It is a unit.

[0008]

In the present invention thus constructed, the temperature of the air blown from the side differential outlet and the front differential outlet can be made different, and the face portion facing the window side of the occupant exposed to the sunshine. Is designed to eliminate the discomfort of the head by the cool air blown from the side differential outlets, while the air blown from the front differential outlets that flow down the inside of the windshield into the passenger compartment and are guided to the passengers' knees and feet. Since the temperature is higher than the cold air blown from the side differential outlet,
It is possible to prevent knee chills, and it is possible to eliminate discomfort due to sunlight and prevent knee chills at the same time.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a schematic configuration diagram of an automobile air conditioner according to the present invention, and FIG. 2 is a perspective view of a main part of the device of FIG.

The vehicle air conditioner 1 according to the present invention is
An intake unit 2 that selectively takes in air inside the vehicle compartment and air outside the vehicle compartment, a cooler unit 3 that cools the air, and a heater unit 4 that reheats the cooled air.
It is composed by connecting and in series.

A fan 5 driven by a motor is provided in the intake unit 2, and an inside air inlet 6 is provided.
An intake door 8 is built in for selectively opening and closing the outside air inlet 7 and the outside air inlet 7.

Inside the cooler unit 3 is provided an evaporator 9 into which a refrigerant flows from a refrigerant conduit (not shown) to which an expansion valve is attached.

The heater unit 4 includes an air inlet 1
No. 0 is opened, and the partition wall 15 that divides the air flow from the air inflow port 10 into two is provided in the upstream region and the downstream region of the heater core 13 as described above.
1 and a lower unit 12 are provided.

Inside the heater unit 4, a heater core 13 in which engine cooling water circulates over both units.
Are provided, and detours 14a and 14b are formed at both ends of the heater core 13, respectively. The heater core 13 heats the air introduced from the intake unit 2 and cooled through the cooler unit 3.

Mix doors 18 and 19 are provided on the front surfaces of the heater cores 13 of the units 11 and 12 so as to be openable and closable, respectively. This both mix door 1
8 and 19, the ratios of the amounts of air flowing through the bypasses 14a and 14b and the heater core 13 are adjusted, and the temperatures of the air blown into the vehicle compartment are independently controlled.

Then, in order to mix the warm air that has passed through the heater core 13 and the cold air that does not pass, the downstream side of the heater core 13 in both the units 11 and 12 is
Mixing chambers 20a and 20b are formed respectively.

Further, the partition wall 15 in the downstream region of the heater core 13 is provided with a communication hole 60 which communicates the both mixing chambers 20a and 20b, and the air of the lower unit 12 passes through the communication hole 60 and is communicated with the upper portion. It is possible to flow into the mixing chamber 20a of the unit 11. In particular, the heated air easily passes through the heater core 13.

A vent outlet 21 is provided near the bypass of the upper unit 11 and a bypass 14b of the lower unit 12 is provided.
A foot outlet 51 is provided near the side unit, a side differential outlet 31 and a front differential outlet 41 are opened closer to the communication hole 60 than the vent outlet 21 of the upper unit 11, and the front differential outlet 41 is Communication hole 60
It's getting closer.

Therefore, the mixing chamber 20a of the upper unit 11
The air conditioned in (1) is selectively blown into the vehicle interior from the vent outlet 21, the side differential outlet 31, and the front differential outlet 41 directly or via a duct.

The air conditioned in the mixing chamber 20b of the lower unit 12 is blown out from the foot outlet 51 directly or through a duct into the vehicle compartment, or through the communication hole 60, the mixing chamber 20a of the upper unit 11. Will be blown out.

The side differential outlet 31 and the front differential outlet 41 are for blowing wind (mainly warm air) to the vicinity of the door mirror of the side glass and the inner surface of the windshield to clear the cloud of the window, and the foot outlet 51. Is for sending wind (mainly warm air) to the feet of the occupant, and the vent outlet 21 is for sending wind (mainly cool air) to the upper body of the occupant.

At these outlets, a vent door 22, a differential door 32, a foot door 52 for opening and closing them,
Are rotatably provided.

The air outlet mode of this automobile air conditioner includes, for example, a vent mode (VENT) that opens only the vent outlet 21, a foot mode (FOOT) that opens only the foot outlet 51, and the vent outlet 21. And a bi-level mode (B / L) that opens the foot outlet 51 and
Differential mode (DEF) that opens only differential outlets 31 and 41
There is a differential foot mode (D / F) for opening the differential air outlets 31 and 41 and the foot air outlet 51.

These outlet modes are set by switching the positions of the mode doors 22, 32, 52.

In the air conditioner for an automobile constructed as described above, for example, when the heating operation is performed in the differential foot mode (D / F) that warms the feet and clears the windshield, the mix of the upper unit 11 is performed. Door 18
The opening of the foot door 52 is adjusted to the position shown by the alternate long and short dash line in FIG.
1, the differential door 32 is arranged at the position shown by the solid line in the figure, and the temperature of the air blown into the vehicle compartment is controlled by the lower unit 12.
Control to be lower.

As a result, the mixing chamber 20 of the lower unit 12
Most of the conditioned air in b is the foot outlet 5
A part of the relatively high temperature air blown out from No. 1 and passed through the heater core is guided to the communication hole 60. After passing through the communication hole 60, it is guided by the butterfly type differential door 32 and mainly guided to the front differential outlet 41. On the other hand, the relatively low temperature air conditioned in the mixing chamber 20a of the upper unit 11 is mostly the side differential outlet 31.
Is guided to the front differential outlet 41. Therefore, the temperature of the air blown out from the front differential outlet 41 is higher than the temperature of the air blown out from the side differential outlet 31, and is equal to or higher than the temperature of the air blown out from the foot outlet 51. In the mixing chamber 20a of the unit 11, it mixes with a part of the conditioned air to generate a minute temperature difference.

That is, it becomes possible to make a difference in the temperature of the air blown out from the side differential outlet 31 and the front differential outlet 41, and the face facing the window side of the occupant in the sun is exposed from the side differential outlet 31. While the discomfort of the head is eliminated by the blown cool air, the air blown from the front diff outlet 41 that flows down from the inner surface of the windshield into the passenger compartment and is guided to the knees and feet of the occupant is discharged from the side diff outlet 31. Since the temperature is higher than that of the cold air blown, it is possible to prevent knee cold.

Accordingly, the two air blown into the vehicle compartment have a predetermined temperature difference, and a comfortable head cold foot heat type air conditioning is realized.

[0030]

As described above, according to the present invention, the temperatures of the air blown from the side differential outlet and the front differential outlet can be made different, and the discomfort caused by the sunlight and the knee coldness can be eliminated. Prevention is realized at the same time.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an automobile air conditioner according to the present invention.

FIG. 2 is a perspective view of a main part of the apparatus shown in FIG.

[Explanation of symbols]

4 ... Heater unit, 9 ... Evaporator, 10 ...
Air inlet, 11 ... Upper unit, 12 ... Lower unit, 13 ... Heater core, 15 ... Partition wall,
21 ... Vent outlet, 31 ... Side differential outlet, 41 ... Front differential outlet, 51 ... Foot outlet,
60 ... Communication hole.

Claims (1)

[Claims] 1. A heater core (1) provided at both ends of a heater core (13) for heating air introduced into a casing.
The detour paths (14a, 14b) detouring 3) are formed, and the air flow flowing out from the heater core (13) is divided into two substantially equal parts, and the partition walls (15) are designed to flow down independently. By providing, the upper unit (11) and the lower unit (12) are formed in the casing, and the front side of the heater core (13) of each of these units (11, 12) and the heater core (13) side and the above In a heater unit of an air conditioner for a vehicle, each of which is provided with a mix door (18, 19) for controlling a ratio of air flowing to a side of a detour (14a, 14b), the partition wall (15) is provided with the upper unit (11). ) And the lower unit (12) and a communication hole (60) is opened, and a vent outlet (21) that blows conditioned air toward the upper body of the occupant, Serial upper unit (11) of said heater core (13) the upper mixing chamber provided downstream of (20a)
A front differential air outlet (41) which is provided so as to communicate with the front windshield central portion and clears the inner surface of the windshield is provided adjacent to the front communication hole (60) in the upper unit (11) and at the same time as the windshield side portion. A side differential outlet (31) for clearing the inner surface of the vehicle is provided so as to be located between the vent outlet (21) and the front differential outlet (41), and conditioned air is blown toward the occupant's feet. An outlet (51) is provided so as to communicate with a lower mixing chamber (20b) provided on the downstream side of the heater core (13), and the side differential outlet (31) and the front differential outlet (41) are opened and closed. Open the differential door (32),
A foot door (5) for opening and closing the foot outlet (51)
The lower mixing chamber (18, 19) controlled by the mix door (18, 19) so as to have a temperature higher than the temperature of the air flowing through the upper mixing chamber (20a) during the diff foot mode operation in which (2) is opened. The front differential outlet (41) and the communication hole (60) are arranged close to each other so that the conditioned air of 20b) is guided to the front differential outlet (41) from the communication hole (60). Characteristic heater unit for automobile air conditioner.