JPH0558143A - Car air conditioner - Google Patents

Abstract

PURPOSE:To provide an airconditioner for car, which can blow a air consisting of well mixed cold wind and warm wind to the driver and passengers. CONSTITUTION:No.1 rotary damper 12 is installed in No.1 air mix chamber 15 which is located at the intersection of No.1 cold wind passage 7 and No.1 warm wind passage 9. Now the heading of the warm wind having passed through the No.1 warm wind passage 9 is changed in compliance with the curvature of the No.1 rotary damper 12b, and this wam wind and a cold wind having passed through the No.1 cold wind passage 7 collide with each other within the No.1 air mix chamber 15 and mix thoroughly. No.2 rotary damper 13b is installed in No.2 air mix chamber 17 which is located at the intersection of No.2 cold wind passage 8 and No.2 warm wind passage 10. Now the heading of the cold wind having passed through the No.2 cold wind passage 6 is changed in compliance with the curvature of the No.2 rotary damper, and this cold wind and the warm wind having passed through the No.2 warm wind passage 10 collide with each other within the No.2 air mix chamber 17 and mix thoroughly.

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 for adjusting the temperature of air blown into a vehicle compartment.

[0002]

2. Description of the Related Art In a conventional vehicle air conditioner, as shown in FIG. 14, the amount of cold air passing through the evaporator 2 and the amount of warm air passing through the heater 3 are adjusted by a flat air mix damper. It was

[0003]

When the amount of cold air and the amount of warm air are adjusted with a flat plate-shaped air mix damper as in the prior art, as shown in FIG. 14, the adjusted cold air and warm air are In the air mix chambers 15 and 17 at the intersection, the air flows in the same direction as each other, and the cold air and the warm air are not sufficiently mixed and are blown into the vehicle compartment in two layers. As a result, the occupant felt uncomfortable, feeling warm air and cold air on his skin.

Therefore, an object of the present invention is to provide an air conditioning system for a vehicle, which blows out air in which cold air and warm air are sufficiently mixed to an occupant.

[0005]

To achieve the above object, the present invention provides an evaporator for cooling blown air,
A heater for heating the air, a cold air passage through which cold air cooled by the evaporator bypasses the heater, a hot air passage for hot air heated by the heater, and the cold air passage. An intersection where the warm air passage intersects with each other, a cold-warm air ratio adjusting unit that adjusts a ratio of the amount of the cold air flowing to the intersection and the amount of the warm air, and a downstream of the intersection, An air outlet for blowing the air, in which the amount of cold air and the amount of warm air are adjusted, into the vehicle interior, and the intersection, which is provided at the intersection, forms a curved shape, and rotates in the bending direction. For a vehicle provided with a barrier that guides one of the cold air and the warm air so that the cold air and the hot air substantially face each other and controls the opening area of the outlet by the rotation. An air conditioner is the main point.

[0006]

In the present invention, the cool air and the warm air after passing through the cool / warm air ratio adjusting means hit the barriers each having a curved shape, and the respective directions thereafter are substantially opposite to each other. In other words, both cold air and warm air are sufficiently mixed by hitting each other at the intersection where the cold air passage and the hot air passage intersect, so that the occupant feels warm air or cold air on his skin. There is no problem of feeling uncomfortable.

Further, according to the present invention, the amount of air blown from the air outlet is adjusted by rotating the barrier to control the opening area of the air outlet. That is, the barrier in the present invention not only sufficiently mixes cold air and warm air, but also adjusts the amount of air blown from the air outlet.

[0008]

According to the present invention, since the temperature of the air blown into the passenger compartment is prevented from becoming uneven, the passenger can always feel the comfortable passenger compartment temperature. Further, in the present invention, since the barrier is used not only for sufficient mixing of cold air and warm air but also for controlling the opening area of the air outlet, the barrier and air outlet for mixing of cold air and warm air are used. Since it is not necessary to separately provide a barrier for controlling the opening area of, the cost can be reduced.

[0009]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing the structure of an air conditioner unit used in the present invention. Reference numeral 1 is a case for housing the air conditioner unit. Reference numeral 2 is an evaporator through which a refrigerant whose inside has been cooled flows, and cools the air passing through the evaporator 2. Reference numeral 20 denotes a drain water discharge port for discharging the drain water generated on the surface of the evaporator 2 to the outside of the vehicle compartment. Reference numeral 3 denotes a heater core through which engine cooling water warmed by heat of an engine (not shown) flows, and heats air passing through the heater core 3.

The case 1 is formed with air outlets 4, 5, and 6 for blowing air to various places in the vehicle compartment. Specifically, 4a is a front heat outlet for blowing air to the feet of an occupant sitting in the front seat, 4b is a rear heat outlet for blowing air to the feet of an occupant sitting in the rear seat, and 5 is the upper body of the occupant. A vent outlet for blowing air into the windshield, and 6 are differential outlets for blowing air into the windshield.

Reference numerals 7 and 8 are a first cold air passage and a second cold air passage, respectively, through which the cool air cooled by the evaporator 2 bypasses the heater core 3. Reference numerals 9 and 10 are a first warm air passage and a second warm air passage through which warm air heated by the heater core 3 passes. Reference numeral 11 denotes a differential passage for flowing cool air cooled by the evaporator 2 and hot air heated by the heater core 3 toward the differential air outlet 6.

The curved shapes 12a and 12b share a rotation shaft (not shown) connected to a servo motor (not shown), and the first rotary is rotatably arranged around the rotation shaft. It is a damper (see FIG. 2). That is, 12a and 12b are interlocked.

The first rotary damper 12a is designated by 1 in FIG.
The portion indicated by 4 is rotated about the rotation axis while always slid to adjust the opening area ratio between the first cold air passage 7 and the first warm air passage 9. By adjusting the opening area ratio, the amount of cold air and the amount of warm air flowing into the first air mix chamber 15 which is the intersection of the first cold air passage 7 and the first warm air passage 9 are adjusted, The outlet 6 degrees from the front heat outlet 4a and the rear heat outlet 4b is adjusted.

The first rotary damper 12b is shown at 16 in the figure.
While always moving the part shown in, rotate about the rotation axis,
The opening area of the front heat outlet 4a and the opening area of the rear heat outlet 4b are adjusted. Then, the amount of air blown from the front heat outlet 4a and the rear heat outlet 4b is adjusted.

When the first rotary damper 12 is fixed at an arbitrary position and the amount of cold air and warm air into the first air mix chamber 15 is determined to be an arbitrary amount, the temperature of the air flowing into the first air mix chamber 15 is determined. Wind is the first rotary damper 12
The airflow direction is changed along the curved shape of b and collides with the cold air flowing into the first air mix chamber 15 through the first cold air passage 7. As a result, the cold air and the warm air are firmly mixed in the first air mix chamber 15, and the air whose temperature is reliably adjusted is blown into the vehicle compartment from the front heat outlet 4a and the rear heat outlet 4b.

The curved parts 13a and 13b share a turning shaft (not shown) connected to a servo motor (not shown), and the second rotary is rotatably arranged around the turning shaft. It is a damper (see FIG. 2). That is, 13a and 13b are interlocked.

The second rotary damper 13a is rotated around the rotation axis while always moving the upper end surface of the heater core 3 in the figure, and the second cold air passage 8 and the second warm air passage 10 are opened. Adjust the area ratio. By adjusting the opening area ratio, the amount of cold air and the amount of warm air that flow into the second air mix chamber 17, which is the intersection of the second cold air passage 8 and the second warm air passage 10, are adjusted, The blowout temperature from the vent outlet 5 is adjusted.

The second rotary damper 13b is 18 in the figure.
While always moving the part shown in, rotate about the rotation axis,
The opening area of the vent outlet 5 and the opening area of the differential outlet 6 are adjusted. Then, the amount of air blown from the vent outlet 5 is adjusted. The amount of air blown out from the differential outlet 6 is controlled by the opening degree of the differential damper 19 arranged in the differential passage 11.

When the second rotary damper 13 is fixed at an arbitrary position and the cool air and the warm air into the second air mix chamber 17 are determined to be arbitrary amounts, the cool air flowing into the second air mix chamber 17 is determined. Is the second rotary damper 13
The airflow direction is changed along the curved shape of b and collides with the hot air flowing into the second air mix chamber 17 through the second hot air passage 10. As a result, the cold air and the warm air are firmly mixed in the second air mix chamber 17, and the air whose temperature is reliably adjusted is blown out from the vent outlet 5 into the passenger compartment.

Next, the first rotary damper 1 will be described with reference to FIG.
The shapes of the second and second rotary dampers 13 will be briefly described. The first rotary damper 12 and the second rotary damper 13 have the same shape.

FIG. 2A is a side view of the first rotary damper 12, and FIG. 2B is A-A in FIG. 2A.
FIG. As shown in FIG. 2 (a), the first rotary damper 12 is formed by cutting out a hollow-cylindrical cylinder having an upper bottom and a lower bottom at a portion indicated by 21 in the figure. That is, the portion indicated by reference numeral 21 in the drawing can be ventilated in the direction perpendicular to the paper surface.

The rotating shafts 24 are provided on the upper bottom 22 and the lower bottom 23, and these two rotating shafts 24 are respectively attached to the case 1.
The first rotary damper 12 is made rotatable by being supported by the. A servo motor (not shown) (see FIG. 3) is connected to one of the rotating shafts 24.
The motor rotates the rotary shaft 24 to rotate the first rotary damper 12.

Although only the air conditioner unit is shown in FIG. 1, a blower unit for generating air in this air conditioner unit is connected at a portion indicated by 25 in FIG. Hereinafter, the blower unit will be briefly described with reference to FIG. FIG. 3 is a perspective view showing both units when the air conditioner unit and the blower unit are integrated.

In FIG. 3, the left half is a blower unit and the right half is an air conditioner unit. In the blower unit, reference numeral 26 is an inside air inlet for taking in the air inside the vehicle into the blower unit, and 27 is an outside air inlet for taking in the air outside the vehicle into the blower unit.
Control of whether air is taken in from the vehicle interior or outside the vehicle is performed by an inside / outside air switching damper (not shown). Reference numeral 28 is a blower case that houses a blower for generating an air flow, and 29 is a part of a blower motor that drives the blower. Then, the airflow generated by the blower is blown to the portion indicated by 25 in FIG. 1 through the communication case 30, and is blown to the entire air conditioner unit. Further, reference numeral 31 in the figure is a first server for driving the first rotary damper 12.
The reference numeral 32 designates a second servo motor for driving the second rotary damper 13, and the arrow in the figure indicates the flow of air.

Next, the control system of this embodiment will be described with reference to FIG. FIG. 4 is a block diagram showing the control system of this embodiment. The output signal T _r from the inside air sensor 33 that detects the temperature inside the vehicle, and the outside air sensor 34 that detects the temperature outside the vehicle
Output signal T _am , an output signal T _s from a solar radiation sensor 35 that detects the position of the sun and the intensity of solar radiation, an output signal T _setr from a right side temperature setter 36 for setting the indoor temperature of the driver's seat, and The output signal T _setl from the left side temperature setting device 37 for setting the passenger compartment indoor temperature is all ECU
It is input to 38.

The ECU 38 is a central processing unit (CP).
U), ROM, RAM, and a well-known microcomputer having an input / output interface. Then, the blower motor 29, the first servo motor 31, and the second servo motor 29 are arithmetically processed according to a predetermined program and map based on the respective output signals.
And a signal for controlling the servo motor 41 that drives the inside / outside air switching damper (not shown).

Based on the above output signals, the microcomputer uses the predetermined mathematical formulas shown in the following mathematical formulas 1 and 2 to calculate the required outlet temperature TA of the driver's seat.
The required blowout temperature TAO1 for Or and the passenger seat is calculated.

[0028]

[Number 1] _{TAOr = K1 * f (T setr} , l) -K2 * T r -K3 * T am -K4 * T sr + K5

[0029]

[Number 2] TAOl = TAOr-K1 * (T setr -T setl) + K4 * (T sr -T sl) F (T _{setr, l)} in the equation (1) represents the function of the T _setr and T _SETL, it may be an average value of, for example, T _setr and T _SETL.

According to the above equations 1 and 2, TAOr
And TAOl (hereinafter, both are collectively referred to as TAO)
Then, the voltage applied to the blower motor 29 is obtained in order to obtain the blown air volume of the blower according to the map shown in FIG. Here, FIG. 5 is a map showing the voltage applied to the blower motor 29 according to TAO.

Switching control signal between the inside air and the outside air, and the first
The control signal to the rotary damper 12 and the control signal to the second rotary damper 13 are also obtained according to the TAO.

FIG. 6 is a front view showing an air conditioner panel used in this embodiment. In FIG. 6, reference numeral 39 is a blower switch for adjusting the blower air flow rate when the air conditioner is used manually instead of automatically. If the air flow rate is turned counterclockwise from the position shown in the figure, the air volume becomes smaller, and if it is turned clockwise. The air volume becomes large. Reference numeral 40 denotes a right side vent switch for adjusting the blowing temperature and the blowing air volume of only the vent in the driver's seat when the blowing mode is the bi-level mode. The temperature decreases and the air volume increases by rotating it counterclockwise from the position shown in the figure. To do. If it is turned clockwise, the temperature rises and the air volume decreases. Reference numeral 41 denotes a left vent switch for adjusting the blowing temperature and the blowing air volume of only the vent of the passenger seat when the blowing mode is the bi-level mode. The temperature decreases and the air volume increases by rotating it counterclockwise from the position shown in the figure. To do. If it is turned clockwise, the temperature rises and the air volume decreases.

How the present embodiment operates in the above-described structure will be described below with reference to the drawings. In addition,
The description given below is for the driver's seat only, and the description for the passenger seat is omitted.

For example, as shown in the left side of FIG. 7, when the right vent switch 40 is set to the intermediate position and the room temperature is set to 16 ° C. by the right temperature setting device 36, the first rotary damper 12 and the second rotary damper 13 are set. Moves to the position shown on the right side of FIG. In other words, the front heat outlet 4a and the rear heat outlet 4b (hereinafter, both are collectively referred to as the heat outlet 4) are all blocked, and the vent outlet 5 is fully opened. Further, since the second rotary damper 13 blocks the second warm air passage 10 and the second air mix chamber 17, the vent outlet 5
The blowout temperature is the lowest. Further, the diff damper 19 blocks all the diff outlets 6.

When the right vent switch 40 is fixed at the intermediate position and the set temperature is gradually raised to set the room temperature to 22 ° C. as shown on the left side of FIG. 8, the first rotary damper 12 and the second rotary damper 12 are rotated. 13 moves to the position shown on the right side of FIG. That is, the first rotary damper 12
The heat outlet 4 is opened about half and the first cold air passage 7 and the first warm air passage 9 are opened so that both the cold air and the hot air are taken into the first air mix chamber 15. Further, the second rotary damper 13 opens the vent outlet 5 and the differential passage 11 by about half each, and the second cold air passage 8 and the second cold air passage 8 are provided so that both the cool air and the hot air are taken into the second air mix chamber 17. The warm air passage 10 is opened. At this time, the diff damper 19 has the diff outlet 6
Since a slight opening is made, a little air flows into the passenger compartment from the differential air outlet 6.

Similarly, when the set temperature is changed while the right vent switch 40 is fixed and the indoor temperature is set to 28 ° C. as shown in the left side of FIG. 9, the first rotary damper 1
The second and second rotary dampers 13 move to the positions shown on the right side of FIG. That is, the heat mode is in which all the heat outlets 4 are opened and all the vent outlets 5 are shut off. Since the first cold air passage 7 and the second cold air passage 8 are all blocked by the first rotary damper 12 and the second rotary damper 13, the blowout temperatures from the heat outlet 4 and the differential outlet 6 are highest. At this time the differential damper 19
Has slightly opened the differential air outlet 6.

When the mode is switched from auto to differential as in the case where the window glass suddenly becomes cloudy while driving the vehicle,
The first rotary damper 12 and the second rotary damper 13 move to the position shown on the right side of FIG. That is, the first rotary damper 12 blocks all the heat outlets 4,
The rotary damper 13 blocks all the vent outlets 5. Then, the diff damper 19 opens all the diff outlets 6.

In this embodiment, the upper and lower independent temperatures can be controlled in addition to the left and right independent temperatures. As shown in the left of FIG. 11, the right temperature setting device 3
When the indoor temperature is set to 22 ° C by 6 and the position of the right vent switch 40 is set to the intermediate position, if the driver feels uncomfortable with the vent air flow, the position of the right vent switch 40 is adjusted. This discomfort can be eliminated. The right side of FIG. 11 shows the right side temperature setting device 3.
11 shows the positions of the first rotary damper 12 and the second rotary damper 13 when the 6 and the right vent switch 40 are set to the left position in FIG. 11.

For example, when the driver feels heat in the upper body when the right temperature setting device 36 and the right vent switch 40 are set as shown in the left of FIG. 11, the right vent switch 40 is moved to the left of FIG. Rotate it counterclockwise as shown. Then, as shown in the right side of FIG. 12, the first rotary damper 12 does not move, but only the second rotary damper 13 rotates counterclockwise. as a result,
The second rotary damper 13 gradually shuts off the second warm air passage 10 and at the same time gradually opens the second cold air passage 8. And finally, the vent outlet temperature becomes the lowest. Further, the opening area of the vent outlet 5 also gradually increases, and finally the vent air volume becomes maximum.

Since the vent outlet temperature and the vent outlet air volume can be controlled by the turning degree of the right side vent switch 40, the turning degree of the right side vent switch 40 is adjusted according to the degree of heat felt by the driver's upper body. Can be eliminated.

On the other hand, when the driver feels a cold sensation in the upper half of the body, the right vent switch 40 may be rotated clockwise as shown in the left of FIG. Then, as shown in the right side of FIG. 13, the first rotary damper 12 does not move, but only the second rotary damper 13 rotates clockwise. As a result, the second rotary damper 13 gradually opens the second warm air passage 10 and at the same time the second cold air passage 8 is opened.
Will be shut off gradually. Finally, the temperature inside the second air mix chamber 17 becomes the highest. Further, the second rotary damper 13 gradually shuts off the vent outlet 5, and finally air is not blown out from the vent outlet 5.

As described above, the right vent switch 4
By rotating 0 clockwise, the vent outlet temperature gradually increases and the vent outlet air volume gradually decreases.
Therefore, the cooling feeling can be eliminated by adjusting the turning degree of the right side vent switch 40 according to the cooling feeling felt by the driver's upper body and lowering the vent outlet temperature and the air volume at the same time.

As described above in detail, in the present embodiment, the first rotary damper and the second rotary damper are formed in the curved shape, so that the first air mix chamber and the second air mix chamber are firmly fixed. Cold air and warm air can be mixed. As a result, the blowing air does not have two layers, and the occupant can experience a comfortable blowing temperature.

Further, in this embodiment, the first rotary damper 12a for performing the air-mixing operation and the first rotary damper 12b for controlling the opening area of the air outlet are driven by one servo motor, so that the first Rotary damper 12
a and the first rotary damper 12b are provided as separate supports.
This leads to cost reduction compared to driving with a motor. The same effect can be obtained for the second rotary damper 13a and the second rotary damper 13b.

The evaporator in the present invention is constituted by the evaporator 2 in the above embodiment, and the heater is constituted by the heater core 3. The cold air passages are the first cold air passage 7 and the second cold air passage 8, and the warm air passages are the first warm air passage 9 and the second warm air passage 10. The intersection is the first air mix chamber 15 and the second air mix chamber 17. The cool / warm air ratio adjusting means is the first rotary damper 12a and the first rotary damper 13a. The outlets are the heat outlet 4 and the vent outlet 5. The barriers are the first rotary damper 12b and the second rotary damper 13b.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of an air conditioner unit used in an embodiment of the present invention.

2A and 2B are views showing a shape of a first rotary damper in the above-described embodiment, FIG. 2A is a side view, and FIG.
FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing a combined state of the air conditioner unit and the blower unit in the above embodiment.

FIG. 4 is a block diagram showing a control system of the one embodiment.

FIG. 5 is a map showing a voltage applied to a blower motor according to a required blowout temperature TAO in the above one embodiment.

FIG. 6 is a front view showing an air conditioner panel of the above embodiment.

FIG. 7 is a schematic diagram showing the position of each rotary damper in the vent mode in the above embodiment.

FIG. 8 is a schematic diagram showing the position of each rotary damper in the bi-level mode in the above embodiment.

FIG. 9 is a schematic diagram showing the position of each rotary damper in the heat mode in the above embodiment.

FIG. 10 is a schematic diagram showing the position of each rotary damper in the diff mode in the above embodiment.

FIG. 11 is a schematic diagram showing the position of each rotary damper when the right vent switch is set to the intermediate position in the bi-level mode in the position embodiment.

FIG. 12 is a schematic diagram showing the position of each rotary damper when the right vent switch is set to the position where the right vent switch is fully turned to the left in the bilevel mode in the position embodiment.

FIG. 13 is a schematic diagram showing the position of each rotary damper when the right vent switch is set to the position where the right vent switch is fully turned to the right in the bilevel mode in the position embodiment.

FIG. 14 is a cross-sectional view showing a configuration of a conventional air conditioner unit.

[Explanation of symbols]

2 Evaporator 3 which is an evaporator 3 Heater core which is a heater 4 Heat outlet 5 which is an outlet 5 Vent outlet which is an outlet 7 First cold air passage which is a cold air passage 8 Second cold air passage which is a cold air passage 9 Temperature First hot air passage 10 which is a wind passage 10 Second hot air passage which is a hot air passage 12a First rotary damper 13a which is a cool and warm air proportion adjusting means Second rotary damper 12b which is a cool and warm air proportion adjusting means First which is a barrier Rotary damper 13b Second rotary damper 15 which is a barrier 15 First air mix chamber which is an intersection 17 Second air mix chamber which is an intersection

Claims (1)

[Claims] 1. An evaporator for cooling blown air, a heater for heating the air, a cold air passage through which cold air cooled by the evaporator bypasses the heater, and the heater. A hot air passage through which hot air heated by the hot air passage passes, an intersection where the cold air passage and the hot air passage intersect, and a ratio of the amount of the cold air flowing to the intersection to the amount of the hot air is adjusted. A cool / warm air ratio adjusting means, a blower outlet formed downstream of the intersection, for blowing out the air, in which the ratio of the amount of the cold air and the amount of warm air is adjusted, into the vehicle interior, and provided at the intersection. And has a curved shape, rotates in the bending direction, and guides one of the cold air and the warm air so that the cold air and the hot air substantially face each other, and And a barrier that controls the opening area of the air outlet by a motion. Air conditioning system, characterized in that.