JPH111122A - Automobile air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide functions of cooling and heating, internal air circulation/ outside air introduction, and switching function of discharge ports mode by mode in an automobile air conditioner installed at a roof inside a cabin. SOLUTION: A heat exchanger 1 and a blower unit 4 are built in an automobile air conditioner installed at a vehicle roof 10 in a cabin, and intake air 11, 12 are heated or cooled by the heat exchanger 1 to realize air-conditioning. Air-conditioning control is performed by operating a heat pump system connected to the heat exchanger 1, by a control means provided at a dashboard panel. The roof is provided with an outside air introduction port 16 to introduce outside air 11, and selection of discharge ports mode by mode is realized by providing discharge port doors 5 that can be opened/closed by an air current.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a configuration and a structure of a heat exchange system and a control structure of an air discharge port in an air conditioner for a vehicle installed on a ceiling of a vehicle in a vehicle compartment.

[0002]

2. Description of the Related Art For example, in recent luxury cars and one-box cars having a relatively large cabin space, as shown in FIG. The driver's seat and the passenger's seat in the front area are independently air-conditioned by the front air conditioner 34, and the air conditioner in the rear area by the cooler unit 32 and the floor heater 33 are independently provided by the cooler unit 32 and the floor heater 33. A vehicle air conditioner having a configuration is mounted.

[0003] First, the front seat air conditioner 34 is a general automotive air conditioner, which is provided with a cooling cycle of a general configuration, and is combined with a heater core to provide a desired cooling and heating effect. Can be easily obtained by operating the control means provided in the. In addition, the introduction air can be easily switched between inside air and outside air.For example, if the air in the vehicle interior is contaminated with smoke from cigarettes, etc., fresh outside air is introduced. When traveling, an operation such as recirculation of air to prevent intrusion of exhaust gas can be performed, so that the occupant can always obtain a comfortable vehicle interior environment.

On the other hand, as a means for achieving air conditioning of the seats in the second and subsequent rows of the one-box car 50, that is, the passenger compartment other than the driver's seat and the passenger's seat, the cooling unit 32 and the floor heater 33 have conventionally been used. Has been established.
The cooler unit 32 supplies the introduced air 12 with the suction port 8.
The cooling air 31 is discharged into the vehicle interior by the blower unit 4,
(See FIG. 5A). Also, the floor heater 33 has a blower fan and a heater core inside, and conducts cooling water of the engine to the heater core to exchange heat with vehicle interior air, and discharges it as warm air 35 by the blower fan (FIG. 5). (See (b) and (c)).

In such a configuration, in order to obtain the effect of cooling and heating, it is necessary to selectively use, for example, only the cooler unit 32 during cooling and only the floor heater 33 during heating. Such proper use control is performed by an occupant, and an operation corresponding to the environment in the passenger compartment is required to obtain a fine air conditioning effect.

A place where the floor heater 33 is installed in the passenger compartment is often provided at the rear of the passenger compartment in order to exert its effect sufficiently. In this case, the cooling water of the engine, which is a heat source, is drawn from the engine. Need to be turned around,
In addition, there are design considerations such as installing an air vent valve when replacing cooling water and securing pipe space inside the chassis. In some cases, a method of directing warm air from the heater installed in the dashboard to the rear cabin via the duct to the rear cabin may be implemented. It is necessary to devise a heat insulating property so that the heating efficiency does not decrease due to the temperature decrease.

When air in a passenger compartment of a general one-box car is ventilated while air-conditioning is performed to replace dirty air with fresh air, the ventilation of the driver's seat and the passenger's seat is dashed. It is possible by operating the inside air / outside air switching means provided on the panel. However, for ventilation in the rear passenger compartment, for example, when air is contaminated by smoke from cigarettes, etc., air conditioning and ventilation at the same time rely on means such as opening windows, for example. However, even if it was ventilated, it was exhausted to the conditioned air at the same time, which was different from the ideal state of introducing air-conditioned outside air.

Further, switching to the defrost mode for removing the fogging of the window glass of the rear passenger compartment has not been possible due to the structure of the conventional air conditioner. Although the direction of cold air or warm air discharged from the conventional cooler unit 32 or floor heater 33 could be adjusted within a certain range, a specific effect is obtained by positively changing the air direction. Rather, for example, it is not possible to switch to the defrost mode in which the harmful air is actively blown onto the window glass to achieve the effect of removing the window fog.

[0009]

In such a conventional air conditioner for a vehicle, a cooler unit and a floor heater mounted on the ceiling in the vehicle compartment are used as means for securing the environment in the passenger compartment at the rear. By installing an air conditioner capable of cooling and heating on the ceiling in the cabin, a good air-conditioned environment can be obtained. The introduction of outside air and inside air can also be selected by the occupant arbitrarily, so that a fresh and air-conditioned environment can be obtained. In addition, the conditioned air blowing direction can be set arbitrarily according to the conditions of cooling and heating, the number of occupants, and the seating position. It is an object of the present invention to provide a defroster function for removing fogging of a window by directly blowing conditioned air to the window glass.

[0010]

According to one aspect of the present invention, there is provided an air flow passage having a built-in blower unit installed on a ceiling of a vehicle in a passenger compartment for generating an air flow. A heat exchanger for performing heat exchange between the suction port and the introduced air in order from the upstream side in the air flow passage to perform cooling and heating, and a discharge port, and the heat exchanger is controlled by control means. A solution is provided by using an air conditioner for automobiles, which is connected to a heat pump system that can be controlled arbitrarily by an occupant and is also used for cooling and heating.

According to a second aspect of the present invention, there is provided a butterfly door provided in the air flow passage for controlling the direction of the air flow, and a discharge port door which is opened and closed by the wind pressure controlled by the butterfly door. A solution is provided by using the vehicle air conditioner according to claim 1.

According to a third aspect of the present invention, there is provided an automotive air system according to the first or second aspect, wherein an outside air introduction port having a tilt-up type roof that can be opened and closed is provided to allow introduction of outside air. The solution is to use a harmony device.

This eliminates the need for a floor heater that is used in combination with the conventional air conditioner for a vehicle, which is mounted on the ceiling of a vehicle cabin, and enables not only cooling operation but also heating operation. Become. Further, since an optimal air outlet according to each mode can be selected without using a complicated link mechanism, air conditioning in the vehicle compartment is preferably achieved. Further, since the outside air can be introduced as needed, ventilation of the vehicle interior can be easily performed, and fresh air with air conditioning can be introduced, thereby realizing a favorable vehicle interior environment.

[0014]

Embodiments of the present invention will be described below. FIGS. 1A and 1B show the configuration of one example of an air conditioner for a vehicle in which the present invention is implemented.
(C) is a system diagram of the heat exchange cycle of the present invention. FIG.
Fig. 3 shows an effect of one example of an air conditioner for a vehicle in which the present invention is implemented, wherein (a) shows the time of heating and (b) shows the time of cooling. FIG. 3 shows the configuration of one example of an automotive air conditioner in which the present invention is implemented (a),
This is shown in FIG. FIG. 4 shows an effect of one example of an air conditioner for a vehicle in which the present invention is implemented.
(A) shows the time of heating and (b) shows the time of cooling.

In the example of the embodiment of the present invention shown in FIG. 1, as a schematic diagram of the configuration in FIG. A certain overhead air conditioner 4
2 is attached, and FIG.
It is a state of the internal configuration when the overhead air conditioner 42 is seen through from the 0 side. The overhead air conditioner 42 having such a configuration first sucks the introduced air 12 from the vehicle interior through the intake port 8, and then performs heat exchange in the heat exchanger 1. This heat exchange action produces cold air required for cooling or warm air required for heating.

The heat exchanger 1 is connected to a heat exchange cycle system shown in FIG. 1C, and constitutes a heat pump type air conditioner having such a configuration. This heat exchange cycle system shares the front seat air conditioner 34, and the overhead air conditioner 4 is arranged in parallel with the front seat heat exchanger 21.
Two heat exchangers 1 are connected and interlock. The flow of the heat medium gas compressed by the compressor 22 is switched by the four-way valve 23 to be sent to the outdoor heat exchanger 20 at the time of cooling, and the heat medium gas is also exchanged by the four-way valve 23 at the time of heating. The flow path is switched to be sent to the heat exchanger 1 and the front heat exchanger 21. In a series of these controls, an air conditioning effect desired by the occupant can be obtained by operating control means provided on a dash panel near the driver's seat.

The conditioned air 13 is sent into the air flow passage 15 by the blower unit 4 and as a result,
The internal pressure rises. Here, by switching the butterfly door 2 by rotating it, when the butterfly door 2 is in the horizontal direction as shown in FIG. 1A, for example, the conditioned air 13 flows out of the discharge port 9 into the vehicle interior. At this time, the discharge port door 5 is closed because stress is applied by the door holding spring 14, and the discharge port 9 is not closed by the butterfly door 2. The pressure passes through the discharge port 9 and is released into the vehicle interior.

In a state where the butterfly door 2 is vertically erected so as to close the discharge port 9 as shown in FIG. 1B, all the pressure inside the air flow passage 15 is concentrated on the discharge port door 5, Overcoming the stress of closing the discharge port door 5 of the door holding spring 14, the discharge port door 5 is opened and flows into the vehicle interior.

As described above, the discharge direction of the conditioned air can be set arbitrarily only by rotating the butterfly door 2.
The ejection port selection control means can be configured without providing a complicated link mechanism. Further, since the optimum blowing direction can be given for each operation of the butterfly door 2 at the time of cooling, heating, prevention of fogging of the window, etc., the mode switching control can be easily performed. FIG. 2 shows the flow of conditioned air when the discharge direction is switched to each mode.
(A) is a state in which only the discharge port door 5 is opened, and the harmful warm air 40 blows downward and circulates in the passenger compartment. FIG. 2B shows a state in which the harmful cool air 41 is blown out from only the discharge port 9 toward the ceiling of the cabin and circulates in the cabin.

FIG. 3 shows another embodiment of the present invention, which is different from that of FIG. 1, but is basically the same as the previous embodiment shown in FIG. It has the same configuration. Although the overhead air conditioner 42 shown in FIG. 1 only circulates inside air, the overhead air conditioner 42 shown in FIG.
For example, there is provided an effect that the smoke of the tobacco in the passenger compartment is promptly discharged or fresh outside air is guided into the vehicle compartment while air conditioning. The outside air inlet 16 has a structure that can be freely opened and closed by a tilt-up roof 3.
By closing this, it is possible to completely isolate it from the outside air, and furthermore, by operating the inside / outside air switching door 6, it is possible to arbitrarily change the mixture ratio of the inside air and the outside air.

FIG. 4 illustrates the effect of the overhead air conditioner 42 shown in FIG. 3. FIG. 4 (a) shows that only the discharge door 5 is opened, and the conditioned warm air 40 blows downward, and It seems to be circulating in the room. FIG. 4B shows a state in which the harmful cool air 41 is blown out from only the discharge port 9 toward the ceiling of the cabin and circulates in the cabin.

The embodiments described above are described for facilitating the understanding of the present invention, and are not described for limiting the present invention. Therefore, each element disclosed in the above embodiment is intended to include all design changes and equivalents belonging to the technical scope of the present invention.

[0023]

As described above, according to the present invention, in a conventional vehicle air conditioner, as a means for securing the rear cabin environment, a cooler unit attached to the ceiling in the cabin and a floor stand are used. What relied on heaters,
By installing an air-conditioning apparatus capable of cooling and heating on the ceiling in a passenger room, a favorable air-conditioned environment can be obtained. In addition, the introduction of outside air and inside air can be arbitrarily selected by the occupant, and a fresh and air-conditioned environment can be obtained. In addition, the conditioned air blowing direction can be set arbitrarily according to the conditions of cooling and heating, the number of occupants, and the seating position. The window glass can be provided with a defroster function of directly blowing conditioned air onto the window glass to remove fogging of the window.

[Brief description of the drawings]

1A and 1B show the configuration of one example of an air conditioner for a vehicle in which the present invention is implemented, and FIG.
1 is a system diagram of a heat exchange cycle of the present invention.

FIGS. 2A and 2B show effects of one example of an air conditioner for a vehicle in which the present invention is implemented, wherein FIG. 2A shows heating and FIG. 2B shows cooling.

FIGS. 3A and 3B show the configuration of one example of an air conditioner for a vehicle in which the present invention is implemented.

FIGS. 4A and 4B show effects of one example of an air conditioner for a vehicle in which the present invention is implemented, wherein FIG. 4A shows a time of heating and FIG. 4B shows a time of cooling.

FIG. 5 shows the configuration of a conventional automobile air conditioner (a).
And (b) and (c) show the time of heating and the time of cooling, respectively.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Heat exchanger, 2 ... Butterfly door, 3 ... Tilt-up roof, 4 ... Blower unit, 5 ... Discharge port door, 6 ... Inside / outside air switching door, 7 ... Air filter, 8
... Suction port, 9 ... Discharge port, 10 ... Vehicle ceiling, 11 ...
Outside air, 12 ... introduction air, 13 ... conditioned air,
14: door holding spring, 15: air flow passage, 16: outside air inlet, 20: outdoor heat exchanger, 21: front seat heat exchanger, 2
2 ... Compressor, 23 ... Four-way valve, 24 ... Liquid tank, 25 ... Expansion valve, 26 ... Check valve, 27 ... Heat pump system, 30 ... Evaporator, 31 ... Cool air, 3
2 Cooler unit, 33 Floor heater, 34 Front air conditioner, 35 Hot air, 36 Cold air, 37 Harmonic hot air, 38 Harmonic cold air, 40 Harmonic hot air, 4
1: Harmonic cold wind, 42: Overhead air conditioner, 50:
One box car.

Claims (3)

[Claims] An air flow passage (15) having a built-in blower unit (4) installed on a vehicle ceiling (10) in a vehicle interior to create an air flow.
Are formed in the air flow passage (15) in order from the upstream side.
(8) and a heat exchanger (1) that performs heat exchange with the introduced air (12) to perform heating and cooling, and a discharge port (9), and is provided with the heat exchanger (1). An air conditioner for an automobile, wherein the air conditioner is connected to a heat pump system (27) provided with a control means which can be arbitrarily controlled by an occupant by the control means. 2. A butterfly door (2) provided in the air flow passage (15) for controlling a direction of an air flow, and a discharge port door opened and closed by a wind pressure controlled by the butterfly door (2).
(5) The air conditioner for a vehicle according to claim 1, comprising: 3. The air intake system according to claim 1, wherein an outside air inlet (16) provided with a tilt-up type roof (3) that can be opened and closed is provided to enable the introduction of outside air (11). Automotive air conditioners.