JPS6021886B2 - Vehicle air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioner for wheels used in automobiles and the like, and particularly to an air mix type air conditioner for vehicle steel.

Air mix type air conditioners for train drivers generally have an air intake at one end, and a first air outlet (heater outlet) that blows air mainly toward the feet of passengers seated at the end. a ventilation duct having a second air outlet (vent outlet) that blows air mainly toward the upper body of the occupant seated in the seat; a heating heat exchanger provided across a part of the cross section; a first air flow flowing through the heating heat exchanger; and a first air flow flowing through the heating heat exchanger; and a temperature control damper that separates the air flow into a second air flow that bypasses the air flow.

The temperature of the blown air in the air conditioner as described above is adjusted by controlling the distribution ratio of the first air flow and the second air flow using a temperature control damper. Air at approximately the same temperature is blown out from the air outlet and the second air outlet. By the way, in automobiles, occupants often feel hot and uncomfortable due to sunlight, and in order to eliminate this discomfort, conventional air conditioners reduce the air conditioning temperature inside the vehicle. Since the temperature of the air blown out from the first air outlet and the air blown out from the second air outlet both decrease, the occupants' feet will now feel cold, and if they are under sunlight conditions like this, It is difficult to maintain comfortable air conditioning.

The present invention can selectively lower the temperature of the air blown toward the occupant's upper body than the temperature blown toward the occupant's feet, eliminating the feeling of hot feet and cold feet caused by sunlight or other causes, and providing a comfortable ride. It is an object of the present invention to provide an improved wheel air conditioner capable of performing air conditioning.

According to the present invention, the present invention has an air intake port at one end and a first air outlet which blows air mainly toward the feet of the occupant seated at the other end. a ventilation duct having a second air outlet that blows air mainly toward the upper body of the occupant; and a heating heater provided in one cross section of the ventilation duct across a part of the cross section. an exchanger and a temperature at which the airflow flowing through the ventilation duct is divided into a first airflow flowing through the heating heat exchanger and a second airflow flowing bypassing the heating heat exchanger; an adjustment damper, a cold air passageway that guides only the airflow that does not pass through the heating heat exchanger out of the airflow flowing through the ventilation duct to the second air outlet, and a cold air control damper that opens and closes the cold air passageway. and a temperature setting device, an outside temperature sensor, an inside temperature sensor, a solar radiation sensor that detects solar heat into the vehicle interior, and a control device that controls the temperature adjustment damper and the cold air control damper, and the The control device operates based on a set temperature signal given by the temperature setting device, an outside temperature signal given by the outside temperature sensor, an inside temperature signal given by the inside temperature sensor, and a solar radiation heat signal given by the solar radiation sensor. Calculate a drifting air temperature, calculate a target damper opening degree from the target blowing air temperature, control the temperature adjustment damper based on the target damper opening degree, and control the temperature adjustment damper for the second air flow. When the degree of opening is at least a predetermined value, or when the interior temperature detected by the interior temperature sensor is at least a predetermined value, and when the solar radiation sensor detects solar heat at or above a predetermined value, the cold air is opened so as to open the cold air passage. This is achieved by an air conditioner for vehicle steel, characterized in that it operates to control a control damper.

According to the air conditioner for car sardines configured as described above, the degree of opening of the temperature control damper with respect to the second air flow is equal to or greater than a predetermined value, and therefore the air is heated by passing through the heating heat exchanger. In operating conditions of the air conditioner in which the amount of air blown out without being heated by bypassing the heating heat exchanger increases beyond a certain predetermined ratio, the temperature By opening the adjustment damper, the amount of air that is heated and sent through the heating heat exchanger is reduced, so that the overall temperature of the blown air is no longer lowered, and the air that has passed through the heating heat exchanger is mainly blown out. Unheated air is blown out toward the upper body of the occupant by opening the cold air control damper while maintaining the temperature of the air blown from the first air outlet to maintain heating of the lower body of the occupant. By increasing the flow rate of air, it is possible to achieve an air-conditioning effect that cools the head and warms the feet by changing the degree of heating for the lower and upper body of the occupant.

Further, in the configuration of the wheel air conditioner as described above, when the inside temperature detected by the inside air temperature sensor is equal to or higher than a predetermined value and the solar radiation sensor detects solar heat equal to or higher than a predetermined value, the cold air passage When the second air outlet is opened, heat exchange for heating in the air flow blown out from the second air outlet towards the upper body of the occupant, especially in response to the heating applied only to the upper body of the occupant due to solar radiation. By increasing the flow rate of air that does not pass through the vessel, it is possible to counteract the heating of only the upper body of the occupant due to solar radiation.

Alternatively, according to a modified example of the present invention, the interior temperature sensor in the vehicle air conditioner as described above has a first interior temperature sensor that detects the temperature of the ceiling in the vehicle interior, and a vehicle air conditioner. and a second interior temperature sensor that detects the temperature of the indoor floor, and instead of the solar radiation sensor detecting that solar radiation is above a predetermined value, the first interior temperature sensor It may be configured to detect that the inside temperature detected by the second inside temperature sensor is higher than the inside temperature detected by the second inside temperature sensor by a predetermined value or more.

As mentioned above, first and second interior temperature sensors are provided in place of the solar radiation sensor, and the interior temperature detected by the first interior temperature sensor is higher than the interior temperature detected by the second interior temperature sensor by a predetermined value or more. By detecting this, it is possible to know that the occupant is receiving solar radiation with an intensity exceeding a certain level on the upper body of the occupant. The flow rate of unheated cold air can be increased.

The invention will now be described in detail by way of example embodiments with reference to the accompanying drawings.

FIG. 1 is a schematic configuration diagram showing one embodiment of a wheel air conditioner according to the present invention.

In FIG. 1, 1 indicates a ventilation duct. The ventilation duct has an interior air intake 2 and an exterior air intake 3 at one end.
The vehicle interior air intake 2 and the vehicle exterior air intake 3
One side is selectively opened and the other side is closed by the inside/outside air switching damper 4. The internal/external air switching damper 4 is driven by a suitable internal/external air switching actuator 5 such as a negative pressure operated diaphragm device. Further, the ventilation duct 1 has a heater outlet 6 and a pent outlet 7 at the other end. The heater outlet 6 is often provided below the instrument panel,
Air is blown mainly towards the feet of the occupants seated in the seats. In many cases, the pent outlet 7 is
It is installed on the instrument panel and blows air mainly towards the upper body of the occupant sitting in the seat. The heater outlet 6 and the pent outlet 7 are selectively opened and closed by individual dampers 8 and 9, respectively.

The damper 8 is connected to an air outlet switching actuator 10, and the damper 9 is connected to an air outlet switching actuator 1.
1, respectively. A blower fan 13 that is rotationally driven by an electric motor 12 is provided near the one end of the ventilation duct 1 .

The blower fan 13 is configured to blow air taken in from the inside air intake 2 or the outside air intake 3 toward the heater outlet 6 and the pent outlet 7. In the ventilation duct 1 on the downstream side of the ventilation fan 13 in terms of air flow, cooling is provided across all the airflow flowing through the ventilation duct, that is, in all of one cross section of the ventilation duct. An evaporator 15, which is a heat exchanger, is provided.

The evaporator 15 constitutes a refrigeration cycle together with a compressor, a condenser, etc. (not shown), and is supplied with cold butter. Further, an air mix type temperature control mechanism 19 is provided in the ventilation duct 1 downstream from the location where the evaporator 15 is disposed.

The temperature adjustment mechanism 19 includes a heater element 20 which is a heating heat exchanger provided in a part of the cross section of one cross section of the ventilation duct 1, and an air flow flowing through the ventilation duct 4 provided in the cross section. an air mix damper (temperature control damper) that separates a first air flow that flows through the heated heater element 20 and a second air flow that flows bypassing the heater element 20;
21, the temperature of the blown air is adjusted by adjusting the relationship of the turn pattern and adjusting the distribution ratio of the first and second air flows. The heater element 20' is supplied with engine cooling water (not shown) in a circulating manner. When the damper is located at the position shown by the solid line in the figure, all of the airflow flowing through the ventilation duct 1 passes through the heater element 20, and the temperature of the blown air becomes high. When the airflow is in a low state as shown by the phantom line at , all of the airflow flowing through the ventilation duct bypasses the heater element 20, so that the temperature of the blown air is low. The air mixer damper 21 is driven by an air mixer damper/actuator 23.

Further, a cold air duct 16 is provided for guiding a negative portion of the air that has passed through the evaporator 15 to the pent outlet 7, bypassing the temperature adjustment mechanism. A cold air control damper 17 is provided in the middle of the cold air duct 16 to control the flow rate of air flowing through the duct. The cold air control damper 17 is driven by a diaphragm device 18 between a fully closed position as shown in solid lines in the figure and a fully open position as shown in phantom lines in the figure. The diaphragm device 18 has its diaphragm chamber 18' selectively supplied with negative pressure and atmospheric pressure by an electromagnetic negative pressure switching valve 22. When negative pressure is being supplied, the damper 17 is brought to the fully open position, and the atmospheric pressure is The damper 17 is brought to the fully closed position when the damper 17 is supplied with the damper 17.
The inside/outside air switching actuator 5, the air outlet switching actuators 10, 11, the air mix damper actuator 23, and the electromagnetic negative pressure switching valve 22 are individually controlled based on operation commands generated by a microcomputer 24. It looks like this. The microcomputer 24 receives a set temperature signal from a temperature setting device 25 operated by a passenger such as a driver, an outside temperature signal from an outside temperature sensor 26, an inside temperature signal from two inside temperature sensors 27a and 27b, and a solar radiation sensor. It is configured to receive solar radiation heat (temperature) signals from 28, and output operation command signals to each of the actuators and gate valves based on these signals. The inside air temperature sensor 27a is installed on the ceiling of the vehicle interior and detects the temperature of the air in the upper layer of the vehicle interior.On the other hand, the inside air overflow sensor 27b is installed on the floor of the vehicle interior and detects the temperature of the air in the lower layer of the vehicle interior. It is designed to detect air temperature.

The microcomputer 24 receives a set temperature signal given by the temperature setting device 25, an outside temperature signal given by the outside temperature sensor 26, an inside temperature signal given by the inside temperature sensors 27a and 27b, and a solar radiation heat signal given by the solar radiation sensor 28. A target blowout air temperature is calculated based on the target blowout air temperature, a target damper function is calculated from the target blowout air temperature, and a signal based on the calculation result is sent to the air mix damper actuator 2.
It is designed to output to 3.

As a result, the temperature of the air mix damper 21 is adjusted so that the temperature inside the vehicle reaches the set temperature set by the temperature setting device 25. Further, the computer 24 selectively outputs an operation command signal to the inside/outside air switching actuator 5 and the air outlet switching actuators 10 and 11 according to the target blowout air temperature. Also computer 2
4 is a state in which the opening degree of the air mix damper 21 with respect to the second air flow that bypasses the heater element 20 is switched to be equal to or higher than a predetermined value, or the interior temperature detected by the interior temperature sensor 27a is equal to or higher than a predetermined value. In this state, the inside temperature detected by the inside temperature sensor 27a is
b is higher than the detected internal air overflow by a predetermined value or more, or when the solar radiation sensor 28 detects solar radiation heat of a predetermined value or more, an energization command signal is output to the electromagnetic personnel pressure switching valve 22.

When the electromagnetic negative pressure switching valve 22 is energized, it applies negative pressure to the diaphragm chamber 18' of the diaphragm device 18, bringing the cold air control damper 17 to the fully open position. As mentioned above, when the inside temperature detected by the inside temperature sensor 27a is higher than the inside temperature detected by the inside temperature sensor 27b by a predetermined value or more, that is, when the upper air temperature in the vehicle interior is higher than the lower air temperature by a predetermined value or more. , or when the solar radiation detected by the solar radiation sensor 28 is higher than a predetermined value, that is, when the solar radiation on the vehicle interior is strong, the cold air control damper 17 is brought to the fully open position, and the relatively low temperature air that has passed through the evaporator 15 is temperature regulated. It bypasses the mechanism 19 and flows directly to the pent air outlet 7, from which it passes through the temperature adjustment mechanism 19 and is blown out along with the simmering air, mainly towards the upper body of the occupant seated in the seat.

Since the air blown out from the pent outlet 7 thus contains the air from the cold air duct 16, the temperature of this air is lower than the temperature of the air blown out from the heater outlet 6. By blowing out air in this manner, the occupant's feet are not excessively cooled, the discomfort of heat in the upper body is relieved, and the occupant can enjoy a comfortable feeling of air conditioning. FIG. 2 is a schematic diagram showing another embodiment of the air conditioner for car steel according to the present invention. In FIG. 2, parts corresponding to those in FIG. 1 are designated by the same reference numerals as in FIG.
In such an embodiment, the air intake of the cold air duct 16 is open to the temperature control mechanism 19, and the heater element 20 is open to the temperature control mechanism 19.
A part of the second air flow is guided to the pent air outlet 7 by bypassing the flow. The cold air control damper 17 is provided at the air intake of the cold air duct 16, and is moved by an actuator 29 between a fully closed position as shown by a solid line in the figure and a fully open position as shown by a phantom line in the figure. It is becoming more and more driven by The actuator 29 is driven by the microcomputer 24 in the same manner as in the embodiment described above. Also in such embodiments,
When the cold air control damper 17 is open, the heater element 2
Since the second air flow bypassing the vent outlet 7 is supplied directly to the vent outlet 7, the temperature of the air blown out from the vent outlet 7 is lower than the temperature of the air blown out from the heater outlet 6, making it comfortable. Air conditioning is performed.

Although the present invention has been described in detail with respect to specific embodiments above, it will be appreciated by those skilled in the art that the present invention is not limited to these and that various embodiments can be made within the scope of the present invention. it is obvious.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing one embodiment of the air conditioner for car cocoon according to the present invention, and FIG. 2 is a schematic diagram showing another embodiment of the air conditioner for car cocoon according to the present invention. 1...Ventilation duct, 2...In-vehicle air intake, 3...
・Vehicle outside air intake, 4...Inside/outside air switching damper, 5...
...Internal and external air cutting actuator, 6... Heater outlet, 7... Pent outlet, 8, 9... Damper,
10, 11...Air blowout □ switching actuator, 12...Electric motor, 13...Blower fan, 15...Evaporator, 16...
Cold air duct, 17...Cold air control damper, 18...
-Diaphragm device, 18'...Diaphragm chamber, 19...Temperature adjustment mechanism, 20...Heater element, 21...Air mix damper, 22...
...Solenoid type negative pressure switching valve, 23... Air mixer/actuator, 24... Microcomputer, 25... Temperature setting device, 26...
...Outside temperature sensor, 27a, 27b...Inside temperature sensor, 28...Solar radiation sensor, 29...Actuator. Figure 1 Figure 2

Claims (1)

[Scope of Claims] 1. An air intake port at one end and a first air outlet that blows air mainly toward the feet of the occupant seated at the other end, and the occupant seated at the seat. a ventilation duct having a second air outlet that blows air mainly toward the upper body of the person; and a heating heat exchanger provided in one cross section of the ventilation duct across a part of the cross section. and a temperature regulating damper that divides the airflow flowing through the ventilation duct into a first airflow flowing through the heating heat exchanger and a second airflow flowing bypassing the heating heat exchanger. a cold air passageway that guides only the airflow that does not pass through the heating heat exchanger out of the airflow flowing through the ventilation duct to the second air outlet; and a cold air control damper that opens and closes the cold air passageway. It has a temperature setting device, an outside temperature sensor, an inside temperature sensor, a solar radiation sensor that detects solar radiation heat into the vehicle interior, and a control device that controls the temperature adjustment damper and the cold air control damper,
The control device is based on a set temperature signal given by the temperature setting device, an outside temperature signal given by the outside temperature sensor, an inside temperature signal given by the inside temperature sensor, and a solar radiation heat signal given by the solar radiation sensor. A target blowout air temperature is calculated, a target damper opening degree is calculated from the target blowout air temperature, the temperature adjustment damper is controlled based on the target damper opening degree, and the temperature adjustment damper controls the second air flow. When the degree of opening is at least a predetermined value, or when the interior temperature detected by the interior temperature sensor is at least a predetermined value, and when the solar radiation sensor detects solar heat at or above a predetermined value, the cold air is opened so as to open the cold air passage. An air conditioner for a vehicle, characterized in that it operates to control a control damper. 2. An air intake port at one end, and a first air outlet that blows air mainly toward the feet of the occupants seated at the other end, and a first air outlet that blows air mainly toward the upper body of the occupants seated at the seat. a ventilation duct having a second air outlet for blowing out air; a heating heat exchanger provided in one cross section of the ventilation duct across a part of the cross section; a temperature regulating damper that divides the airflow flowing through the heating heat exchanger into a first airflow flowing through the heating heat exchanger and a second airflow flowing bypassing the heating heat exchanger; a cold air passage that guides only the air flow that does not pass through the heating heat exchanger to the second air outlet; a cold air control damper that opens and closes the cold air passage; a temperature setting device; an air temperature sensor, a first inside temperature sensor that detects the temperature of the ceiling inside the vehicle interior, a second inside temperature sensor that detects the temperature of the floor inside the vehicle interior, the temperature adjustment damper, and the cold air control damper. and a control device for controlling a set temperature signal given by the temperature setting device, an outside temperature signal given by the outside temperature sensor, an inside temperature signal given by the inside temperature sensor, and a set temperature signal given from the solar radiation sensor. A target blowout air temperature is calculated based on the given solar radiation heat signal, a target damper opening is calculated from the target blowout air temperature, the temperature adjustment damper is controlled based on the target damper opening, and the temperature adjustment is performed. The degree of opening of the damper to the second air flow is greater than or equal to a predetermined value, or the inner temperature detected by the first inner temperature sensor is greater than or equal to a predetermined value, and the inner temperature detected by the first inner temperature sensor is greater than or equal to a predetermined value. An air conditioner for a vehicle, characterized in that the vehicle air conditioner operates to control the cold air control damper to open the cold air passage when the inside temperature is higher than a predetermined value or more than the inside temperature detected by the second inside temperature sensor.