JPS6294414A - Air conditioner for car - Google Patents

Abstract

PURPOSE:To secure the bilevel mode simply and certainly by installing a warm air guide for introducing the warm air flowing into an air mixing damper towards a heating blow-out port, onto an opening and closing deflection damper at a defrost blow-out port. CONSTITUTION:The air inhaled from an outside air suction inlet 1 or an inside air suction inlet 2 by a blower 4 is dehumidified by an evaporator 6, and divided into the flow which passes through a heater core 7 and is warmed and the flow passing through a cold air bypass passage 6a by an air mixing damper 8, and therefore, the warm air (a) and cold air (b) are blown out at the outlet port of a heat exchange part B. In this case, the warm air (a) is obstructed by a warm air guide 30 installed in projection onto the undersurface of a deflection damper 20 in bilevel mode, and deflected so as to be introduced towards a heating blow-out port 14. While, in defrosting mode, the deflection damper 20 is opened, and the warm air guide 30 shifts, and the warm air (a) smoothly flows to a defrost blow-out port 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application] The present invention relates to an air conditioner for an automobile equipped with a mechanism for bringing the temperature distribution inside the vehicle into a so-called cold-head-warm state.

[Prior art] Since the driving performance of automobiles, especially passenger cars, has reached a nearly satisfactory level, technological development is currently particularly active in order to further improve the comfort inside the vehicle interior. is being carried out.

For example, an air conditioning system has been developed that gives a more comfortable feeling of warmth by creating a so-called cool head/feet heat indoor temperature distribution that makes the lower space of the vehicle interior warmer than the upper space when the air system is in operation. It is also useful for efficient use of heating energy. 1-special m1ll
1357-178914 J k: ltl The technique shown is one example, and an air conditioning heat exchanger is designed so that cold air passages bypassing the heat exchanger are formed on both left and right (or upper and lower) sides of the air conditioning heat exchanger. In addition to being installed in the center of the duct, the air mix area for mixing cold and hot air downstream of the heat exchanger is divided into two sections connected to separate air outlets, and the air mix damper installed in each of these sections ,
A method for individually adjusting the temperature of the air blown from the mountain outlet is shown. According to this method, it is possible to selectively and reliably make the temperature distribution in the vehicle interior uneven to any degree in the left-right direction or the vertical direction.

In addition, as a way to create a simpler temperature distribution for cold feet and heat,
For the so-called pie-level blowout air conditioning mode, which bypasses the air mix area for mixing hot and cold air and sends cold air directly to the ventilation air outlet into the bypass cold air path,
A method of providing a pie level blowout branch duct with a pie level damper is becoming common.

[Problems to be solved by the invention] For example, [as in the technique of JP-A-57-1789144, 2
One method is to use two air mix dampers, each dedicated to adjusting the temperature of each outlet, in order to blow out m different types of air from one air-conditioning outlet.
In addition to the complicated structure of the air conditioner, the difficulty of individually operating each air mix damper poses new problems.

The present invention provides a type of air-conditioning heat exchanger equipped with an air mix damper for arbitrarily changing the air volume ratio of hot air and cold air, and an air mix chamber for mixing cold and hot air. The direction of cold air and warm air flowing into the air mix chamber can be guided as necessary, so that relatively warm air can be blown out from one of the two outlets and relatively cold air can be blown out from the other. The purpose is to provide an air conditioner for automobiles.

[Means for Solving the Problems] In order to achieve the above object, the automotive air conditioner of the present invention has an air conditioner provided with an inlet for conditioned air, and outlets for penderation, heat, and defrost. An air conditioner for automobiles that incorporates an air conditioning heat exchanger, a blower, an air mix damper for controlling outlet temperature, and a damper for opening and closing each outlet in the duct, and is equipped with an air mix chamber for mixing cold and warm air. A warm air guide for guiding warm air flowing into the air mix chamber toward the heat outlet is actuated on the differential damper for opening and closing the defrost outlet so that the differential damper opens the defrost outlet. In such a case, we adopted a structure in which the defrost outlet is installed in a manner that does not prevent ventilation from flowing into the defrost outlet.

[Function] In the device of the present invention having the above-described configuration, when the defrost outlet is closed with both the ventilation air conditioner and heat outlets open, the air provided at the upstream side of each of these outlets is released. The warm air flowing into the mix chamber is directed toward the heat outlet by the hot air guide attached to the differential damper, so the direction of the warm air from the heat outlet is relatively higher than that from the ventilator air outlet. = 5- Warm air can be blown out to create a clear temperature difference between the mountain outlet air temperature.

On the other hand, when blowing air out of the defrost outlet,
The warm air guide rotates together with the defrost damper and is moved to a position where it does not obstruct air flowing into the defrost outlet.

[Embodiment 1] A specific configuration of the present invention will be described below based on an embodiment shown in the accompanying drawings. 1 to 4 show an embodiment of the present invention, and FIG. 1 is a schematic cross-sectional view thereof.

The device is roughly divided into three parts: an introduction part A for the conditioned air, an air heat exchange part B, and a mixing and blowing part C for the heat-exchanged cool air and warm air.

The air introduction section A includes an outside air intake port 1, an inside air intake port 2, an inside/outside air switching damper 3 for selectively opening and closing the entrances to both eyes, and a blower 4 disposed downstream thereof. 5 is a blower motor. The heat exchange section B occupies the downstream side of the air conditioning duct 10 that forms the exterior body of the device, and has an evaporator 6 as a cooling heat exchanger on the most upstream side, and a hot water heating heat exchanger on the downstream side thereof. A heater core 7 as an exchanger and a cold air bypass passage 6a are provided to bypass the heater core 7 and cause the cold air to flow downstream. Reference numeral 8 denotes an air mix damper for arbitrarily changing the ratio of the air passing through the heater 7 and the air passing through the cold air bypass passage 6a, and serves to adjust the blowing temperature of the conditioned air. cold·
The warm air mixing blowout section C occupies the 1st stream side portion of the air conditioning duct 10, and forms a boundary between it and the heat exchange section B on the opposing inner wall surface of the air conditioning duct 10 (in this case, The air mix chamber 9 is constructed by attaching relatively narrow partition walls 10a and 10b of 1J to the left and right inner wall surfaces. An extremely short duct 11a is attached to the front of the air mix chamber 9 (the surface facing the driver's cab), and a ventilation air outlet 11 is attached to the end of the duct 11a.
is open. 12 is a vent damper for opening and closing the ventilation outlet 11, 13a is a ventilation duct, and 13 is a pendeletion outlet grille. A heat outlet 14 is opened in the bottom wall surface of the air mix chamber 9, and is connected to the indoor heat outlet 16 via a duct 16a. 15 is a heat damper for opening and closing the heat outlet 14.

A defrost outlet 21 is opened on the top wall surface of the air mix chamber 9, and is opened and closed by rotating the defrost damper 20. The rotation shaft 20a of the differential damper 20 is installed so that its axial direction is parallel to the air flow direction in the air conditioning duct 10. A warm air guide 30 is installed in a downward direction so as to block the flow of 1 ffl flowing into the air mix chamber 9 when it is in the closed solid line position in FIG. The hot air guide 30 of this embodiment has a rectangular plate shape, and is integrated with the differential damper 20 made of a metal plate or synthetic resin. Of course, the warm air guide 30 is created separately from the damper 20, and is not limited to the upstream edge described above.
It may be attached to an appropriate location in a manner that achieves the purpose of the present invention.

In Fig. 2, D is the windshield and E is the driver's seat.

Next, the operation of the above embodiment device will be explained. As is well known, automotive air conditioners generally have an operation panel built into the driver's instrument panel, which is not shown in the attached figure, for controlling the operation of the device and selecting the desired air conditioning state. ,
In addition to the operating lever for the inside/outside air switching damper 3, the blowing capacity switching lever for the blower 4, and the rotating lever for the temperature control air mix damper 8, an air conditioning mode switching lever is incorporated.

By moving this air conditioning mode switching lever, the vent damper 12, heat damper 15, and differential damper 20 are opened and closed in a predetermined interlocking relationship by a link mechanism (not shown). In addition to being able to select the vent air conditioning mode in which only the air outlet 11 is opened, the heat outlet mode in which only the heat outlet 14 is opened, and the afrost air conditioning mode in which only the defrost outlet 21 is opened, the ventilation outlet 11 and P1~ It is also possible to select a pie level outlet air conditioning mode in which the outlet ports 14 are opened at the same time.

At this time, the differential damper 20 occupies the closed position.

The feature of the pie level air conditioning mode is that the pendeletion air outlet grille 1 is installed at the height of the passenger's chest.
By blowing out relatively cold air from 3 and as warm air as possible from the indoor heat outlet 16 that opens toward the occupant's feet, we achieve a cold head and foot condition that is considered to be the ideal indoor thirst distribution during heating. The point is to make it happen. Here, to explain with reference to FIG. 1, the conditioned air sucked in by the blower 4 from the suction port 1 or 2 and pushed out is dehumidified by passing through the evaporator 6 which is operated as needed. In addition, the air mix damper 8 separates the flow into the flow that passes through the heater core 7 and is warmed, and the flow that passes through the cold air bypass passage 6a while still being cold, so that the outlet area of the heat exchange section B has a flow indicated by an arrow (A) in the figure. The warm air shown and the cold air shown by the arrow (mouth) are blown out after the separation state. For example, as in the method described in the prior art section, such divided flows of cold and hot air are not mixed immediately, but instead are created using ventilation blow-off rods and heat blow-off rods each incorporating an independent air mix damper. Unless special measures are taken such as sending the air into an outlet duct, the air is literally mixed together by being sent into the air mix chamber 9 connected downstream of the heat exchange section B, and the ventilation outlet grill 13 and the indoor heat outlet 16 Air of the same temperature as the air conditioner is blown out from and.

However, in this embodiment, the hot air flowing from the heat exchange section B into the 1-mix chamber 9 in the flow direction shown by the arrow (A) in FIG. The hot air guide 30 protruding from the lower surface (of the device) of the closed differential damper 20 blocks the flow of the air and avoids direct merging with the cold air indicated by the arrow (B) as much as possible. The air is deflected directly toward the heat outlet 14 which is opened on the bottom wall surface of the air mix chamber 9. However, even if the direction of the hot air is deflected in this way, the original function of the air mix chamber 9, which is to mix cold and hot air, is not completely lost; Conditioned air is blown out which is relatively less warm than the air outlet 14. Therefore, compared to the conventional method of providing dedicated air mix chambers for the ventilation and heat outlet, it is much easier than the method of attaching a branch duct for pie level outlet, and it is much easier to avoid cold head and feet. It is possible to realize a so-called pie-level blowout air conditioning mode that can sufficiently emphasize the degree of air conditioning. However,
The object of the present invention can be better achieved by attaching the hot air guide according to the present invention to a device equipped with a branch duct for pie level blowing.

When the differential damper 20 hangs down into the air mix chamber 9 and assumes the open position as shown by the broken line in FIG. 2, the hot air guide 30 also moves to the broken line position in the figure. Warm air for preventing fogging of the window glass is supplied to the defrost outlet 21 due to the presence of the warm air guide 30.
There is no need to worry about any inconvenience that may obstruct your path.

As already mentioned, the hot air guide 30 is not limited to a simple flat plate-like body, but can have an appropriate shape to most effectively perform its function for automotive air conditioners with various design specifications. It is desirable to select. For example, a warm air guide 30° curved along the flow direction of the hot air is attached to the differential damper 20 shown as an external view in FIG. 4.

The hot air guide 30 may also have a three-dimensional shape such as a foam molded body of hard synthetic resin.

[Effects of the Invention] The device of the present invention having the above-mentioned configuration 2 blows relatively cooler air from the ventilation outlet that opens toward the upper space of the vehicle interior, and then directs it toward the lower space of the vehicle interior. The so-called pie-level blowout air conditioning mode, which blows out as warm air as possible from the opening heat outlet, is fully emphasized by simply attaching a hot air guide to the differential damper of the conventional device. can be realized.

When the defrost air conditioning is activated, the warm air guide is moved along with the defrost damper to a position where it does not get in the way so that it does not block the defrost warm air from flowing into the defrost outlet, thereby impairing the defrost function. Does not cause any inconvenience.

[Brief explanation of drawings]

1 to 4 are views relating to an embodiment of the device according to the present invention, in which FIG. 1 is a schematic cross-sectional view, and FIG. 2 is a schematic cross-sectional view of the device, and FIG. FIG. 3 is a schematic side sectional view of the installed state, FIG. 3 is a sectional view taken from (c) to (c) of FIG. 1, and FIG. 4 is a perspective view of the differential damper. In the diagram, 2...Air intake port 4...Blower 6...
・Heat exchanger for cooling 7...Heat exchanger for heating 8...
Air mix damper 9... Air mix chamber
10... Air conditioning duct 11... Ventilation outlet 14... Heat outlet 21... Defrost outlet 20... Defrost damper 12.15... Outlet damper 30... Warm air guide

Claims (1)

[Scope of Claims] An air conditioning heat exchanger, a blower, an air mix damper for controlling the outlet temperature, and each blower are installed in an air conditioning duct provided with an inlet for conditioned air and outlets for ventilation, heat, and defrost. In an air conditioner for an automobile, which incorporates a damper for opening and closing an outlet and is equipped with an air mix chamber for mixing cold and warm air, the warm air flowing into the air mix chamber is connected to the defrost outlet opening/closing defrost damper. An air vehicle for an automobile, characterized in that a warm air guide for guiding the air toward the outlet is installed in such a way that when the defrost damper operates to open the defrost outlet, ventilation to the defrost outlet cannot be prevented. harmonization device.