JPS5827846Y2 - Automotive air conditioner - Google Patents

Description

[Detailed description of the invention] The present invention is an air-conditioning system for automobiles, more specifically, an air-mix system for automobiles equipped with a dash panel that partitions an engine room and a single room.
type) air conditioner.

This type of air mix type air conditioner generally has the following characteristics:
A duct, a cooling device provided in the duct that cools the air that is made to flow through the duct by a blower, and air that is provided in the duct and passes through the cooling device downstream of the cooling device. It has a heating device for heating the air, and an air mixing chamber provided in the duct downstream of the heating device.

In conventional air mix type air conditioners, the space inside the duct between the cooling device and the heating device is connected to the air mixing chamber by bypassing the heating device using a separate bypass duct, and the air is passed through the bypass duct. The air flowing into the air mixing chamber through the heating device and the air flowing into the air mixing chamber through the heating device are mixed with each other, and the mixed air is sent into the vehicle interior.

Alternatively, instead of the bypass duct, the heating device is inclined within the duct, and the space formed between the heating device and the duct wall by the inclination is used as a bypass passage, and the space between the cooling device and the heating device is used as a bypass passage. The space within the duct is communicated with the air mixing chamber by bypassing the heating device through the bypass passage.

As mentioned above, conventional air mix type air conditioners are equipped with a separate bypass duct, which requires a large installation space. If this is necessary, the interior space of the vehicle will become smaller accordingly.

When forming a bypass passage by tilting the heating device as described above instead of the bypass duct,
Although the need for a large installation space is eliminated, the slanted heating device increases the resistance to airflow passing through the heating device, reducing air blowing efficiency.

The present invention was devised in view of the problems of the prior art as described above, and its purpose is to provide an air-mix type automobile air conditioner that does not require a bypass duct or bypass passage. That's true.

The object of the present invention is to install a cooling device, a heating device, etc. in an engine compartment, and to open a first space in a duct between the cooling device and the heating device through a first opening provided in a dash panel. A second space in the duct downstream of the heating device is connected directly to an air mixing chamber in the passenger compartment through a second opening provided in the dash panel, i.e. a first space formed in the engine compartment. The second space and the air mixing chamber in the vehicle interior are closely related to each other through the dash panel.

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

As shown in FIG. 1, an automobile generally has a dash panel 15 that partitions an engine room 11 and a passenger compartment 13, and a front body 17 is attached to the engine room 11 side for the purpose of heat insulation and protection of units. A fixed hard rubber or metal blade 19 is provided defining a space 21 between the blade and the dash panel 15.

The space 21 is the windshield 2 of the dash panel 15.
A large number of slits 25 provided in a top plate 23 protruding forward from the top plate 2 communicate with the outside air, and main components of the air conditioner are installed within the space 21.

The air conditioner according to the invention consists of: - As clearly illustrated in FIG. It has a duct 27 and an air blower that causes air to flow through the duct, and the air blower includes a centrifugal fan 29 and a fan motor 31 that rotates the fan.

As shown in FIG. 1, the air intake port (not shown) of the fan 29 is communicated with outside air through an opening 35, a space 21, and a slit 25 provided in a guide duct 33 surrounding the air intake port. Along with the dash panel 1
The vehicle compartment 13 is opened through the opening 39 provided in the bottom plate 37 of the
The damper 4 is connected to the openings 35 and 39.
1 is associated.

The damper 41 is pivotable between a position where the opening 35 is fully closed and a position where the opening 39 is fully closed. or those openings 35 and 3
The ratio of outside air and cabin air passing through the fan fan 9 is adjusted to allow a mixture of the outside air and cabin air to flow into the fan air intake port.

As shown in FIG. 2, the air conditioner further includes a duct 2
An evaporator (
a cooling device 43 consisting of a refrigerant evaporator of a refrigeration cycle;
It has a heating device 45 which is disposed in the duct downstream of the cooling device and heats the air that has passed through the cooling device 43 with engine cooling water or exhaust gas.

As shown, the cooling device 43 and the heating device 45 are arranged substantially perpendicular to the direction of air flow indicated by the arrow 47 flowing within the duct 27, in other words, the cooling device 43 and the heating device 45 The flow passages are arranged substantially parallel to the direction of the air flow, thus minimizing flow resistance as the air flow through the duct 27 passes through the cooling device 43 and the heating device 45. ing.

The dash panel 15 has two openings 5, a first and a second opening.
1 and 53, and the first opening 51 is the cooling device 4.
The second opening 53 communicates with a first space 55 formed in the duct 27 between the heating device 4 and the heating device 4.
It communicates with a second space 57 formed in the duct on the downstream side of 5.

A cover member 59 is also provided on the surface of the dash panel 15 facing the vehicle interior 13 so as to cover the openings 51 and 53.
is attached in a sealed state via a seal 61 and defines an air mixing chamber 63 between it and the dash panel 59,
The chamber 63 communicates directly with the space 55 through the opening 51 and with the space 57 through the opening 53.

A regulating valve 65 made of a flat damper is associated with the opening 51 and the heating device 45, and the regulating valve 65 is placed in a position where the opening 51 is fully closed and an air flow path in the heating device 45 is fully closed. the amount of air that has passed through the cooling device 43 flows directly into the air mixing chamber 63 through the opening 51 and through the heating device 45 through the opening 53. The ratio of the amount flowing into the air mixing chamber 63 is adjusted.

A duct 71 is connected to the cover member 59, and a known rotary damper 73 formed in a cylindrical shape and rotationally driven is provided in the duct 71, and three ducts are connected to the duct 71. 75, 77 and 79 and their ducts 71 are switched.

One of the three ducts 75 is connected to a hot air outlet for the occupant's feet, and the other duct 77 is a cold air outlet that opens toward the occupant's upper body, that is, a vent ( vent) and another duct 7
9 communicates with a defroster nozzle that opens toward the windshield 22.

Next, the operation of the air conditioner described above will be explained.

When the fan 29 is rotated by the fan motor 31,
An amount of outside air adjusted by the rotational position of the damper 41 is passed through the slit 25, the space 21 and the opening 31, and/or
Alternatively, the air inside the vehicle compartment 13 flows into the air intake port of the fan 29 through the opening 39, and the air flows inside the duct 27 in the direction indicated by the arrow 4.
It flows in the direction of 7.

The air first passes through the cooling device 43 and is cooled, and the cooled air is distributed to the opening 51 and to the heating device 45 in a proportion determined by the rotational position of the control valve 65.

The air that has passed through the opening 51 flows directly into the air mixing chamber 63, and the air that has passed through the heating device 45 is heated and flows into the space 57, from where it passes through the opening 53 and flows into the air mixing chamber 63. 63 and is mixed with the air that has flowed into the air mixing chamber through the opening 51, and the mixed air is pumped out of the ducts 75, 77, 79 by the rotary damper 73 in the duct 71 as necessary. one or two of
The water is allowed to flow into the vehicle compartment 13 through two channels.

When the control valve 65 is placed in a position to completely close the air flow path in the heating device 45, the entire amount of air that has passed through the cooling device 43 and has been cooled flows into the air mixing chamber 63 through the opening 51, and the rotary The damper 73 causes the air to flow into the passenger compartment through the duct 77 to obtain maximum cooling.

When the control valve 65 is placed in a position that fully closes the opening 51,
The total amount of air that has passed through the cooling device 43 is heated through the heating device 45, flows from the space 57 through the opening 53 into the air mixing chamber 63, and is moved by the rotary damper 73 into the duct 7.
5 and flows into the passenger compartment to obtain dehumidifying heating or maximum heating.

In this case, the cooling device 43 may be set to an inactive state so that the air passing through it is not cooled.

The position where the control valve 65 fully closes the opening 51 and the heating device 4
By being placed at an intermediate position between the position in which the air flow path is fully closed in 5 and the position in which the air flow path is fully closed, a part of the air that has passed through the cooling device 43 passes through the opening 51, and the rest is passed through the heating device 45 and the space 57.
and the opening 53, and flow into the mixing chamber 63, where they are mixed.

Thus, depending on the position of the control valve 65, the openings 51 and 53
The proportion of air flowing into the mixing chamber 63 through each is adjusted, so that the temperature of the air mixed in the mixing chamber is
That is, the temperature of the air blown from the mixing chamber into the vehicle interior is adjusted.

As described above, in the automotive air conditioner according to the present invention, the cooling device 43, heating device 45, etc. are installed in the engine compartment 11, while the air mixing chamber 63 is installed in the passenger compartment 13, and the The mixing chamber 63 has a cooling device 43 and a heating device 4.
5 and its heating device 45
Because they are located close to the downstream duct interior space 57 and are in direct communication with each other through the openings 51 and 53 provided in the dash panel 15, respectively, the separate This eliminates the need for a bypass duct or the need to form a bypass passage by tilting the heating device, making it possible to narrow the installation space required for the entire air conditioner and increase the interior space of the vehicle. Since there is no need to tilt the device, it is possible to reduce the air flow resistance through the heating device.

Further, the temperature of the air blown into the vehicle interior can be suitably adjusted by the action of the control valve 41.

Further, by installing the blower devices 29, 31 in the engine compartment 11 (this itself is not an essential requirement of the present invention), it is possible to reduce the noise inside the vehicle.

The configuration described above is merely an example, and the present invention can be modified in various ways.

For example, by reversing the positions of the blower device 29.31 and the cooling device 43, by associating the control valve 65 with the opening 53,
Alternatively, the same effects as described above can be obtained by relating the damper to both the openings 51 and 53, or by using a flat damper instead of the rotary damper 73.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing the vicinity of a dash panel of an automobile, and FIG. 2 is a cross-sectional view taken along the line ■-■ in FIG. 1. 11...engine room, 13...vehicle compartment, 15...
・Dash panel, 17...Front body 119・
...Blade, 21...Space, 22...Windshield, 23...Top plate, 25...Slit, 27...
・Duct, 29... Fan, 31... Blower motor, 33... Guide duct, 35... Opening, 37...
・Bottom plate, 39...opening, 41...damper, 43・
...Cooling device, 45...Heating device, 47...Arrow,
51.53...1st. Second opening, 55, 57...
・First. Second duct interior space, 59... cover member,
61... Seal, 63... Air mixing chamber, 65...
Control valve, 71...Duct, 73...Rotary damper, 75, 77.79...Duct.

Claims (1)

[Claims for Utility Model Registration] An air conditioner for an automobile equipped with a dash panel that partitions an engine room and a passenger compartment, which includes a duct installed in the engine room and a device for flowing air into the duct. a cooling device disposed in the duct to cool the air passing through the duct; and a cooling device disposed in the duct downstream of the cooling device to cool the air passing through the cooling device. a heating device for heating; and a heating device provided in the dash panel and within the duct.
a first opening communicating with a first space between the cooling device and the heating device; a first opening provided in the dash panel and within the duct;
a second opening that communicates with a second space on the downstream side of the heating device; an air mixing chamber provided in the vehicle interior that communicates with the first space through the first opening; and an air mixing chamber directly communicating with the second space through the second opening and for mixing the air flowing in through the first and second openings with each other; An air conditioner for an automobile, comprising: a control valve for adjusting the amount of air flowing into the air mixing chamber through the first and second openings, respectively.