JP3206030B2 - Vehicle air conditioner - Google Patents

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 controlling 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 an evaporator 2 and the amount of warm air passing through a heater 3 are adjusted by a flat air mix damper. Was.

[0003]

When the amount of cold air and the amount of warm air are adjusted by a flat plate-shaped air mix damper as in the prior art, as shown in FIG. In the air mix chambers 15 and 17, which are the intersections, the air blows in substantially the same direction, and the cold air and the hot air are blown into the vehicle compartment in a state of being separated into two layers without being sufficiently mixed. As a result, the occupants felt uncomfortable, feeling warm air or cold air on their skin.

Accordingly, an object of the present invention is to provide an air conditioner for a vehicle that blows air, in which cold air and warm air are sufficiently mixed, to an occupant.

[0005]

In order to achieve the above object, the present invention provides an evaporator for cooling the blown air,
A heater that heats the air, a cool air passage through which the cool air cooled by the evaporator bypasses the heater, a hot air passage through which the warm air heated by the heater passes, and the cold air passage. An intersection where the hot air passage intersects, a cool / hot air ratio adjusting means for adjusting a ratio between an amount of the cold air and an amount of the hot air flowing to the intersection, and formed at a downstream of the intersection; An outlet for blowing the air, in which the ratio of the amount of the cool air and the amount of the hot air is adjusted, into the vehicle interior, is provided at the intersection, has a curved shape, and rotates in the bending direction. A vehicle that guides one of the cold air and the hot air so that the cold air and the hot air substantially oppose each other and controls the opening area of the air outlet by the rotation. An air conditioner is the gist.

[0006]

According to the present invention, the cold air and the hot air after passing through the cool / hot air ratio adjusting means hit the curved barriers, and the respective directions thereafter substantially oppose each other. In other words, both the cold air and the hot air are sufficiently mixed by colliding with each other at the intersection where the cold air passage and the hot air passage intersect, so that the occupant feels warm air on the skin or cold air on the skin. The problem of unpleasant feelings disappears.

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

[0008]

According to the present invention, since the temperature of the air blown into the vehicle compartment is prevented from being uneven, the occupant can always feel the comfortable vehicle interior temperature. Further, in the present invention, the barrier is used not only for sufficient mixing of the cold air and the hot air but also for controlling the opening area of the air outlet, so that the barrier and the air outlet for the mixing of the cold air and the hot air are used. There is no need to provide a separate barrier for controlling the opening area of the device, which leads to cost reduction.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing a configuration of an air conditioner unit used in the present invention. Reference numeral 1 denotes a case for housing the air conditioner unit. Reference numeral 2 denotes an evaporator through which a refrigerant having cooled inside flows, and cools the air passing through the evaporator 2. Reference numeral 20 denotes a drain water discharge port for discharging 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 heated by the heat of an engine (not shown) flows, and heats air passing through the heater core 3.

The case 1 is provided 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 the occupant sitting in the front seat, 4b is a rear heat outlet for blowing air to the feet of the occupant sitting in the rear seat, and 5 is the upper body of the occupant. Reference numeral 6 denotes a vent outlet for discharging air to the windshield, and reference numeral 6 denotes a differential outlet for discharging air to the windshield.

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

The curved rotary members 12a and 12b share a rotating shaft (not shown) connected to a servo motor (not shown), and a first rotary member rotatably disposed about the rotating shaft. It is a damper (see FIG. 2). That is, 12a and 12b are linked.

The first rotary damper 12a is a
4 is rotated around the rotation axis while always sliding, and the opening area ratio between the first cold air passage 7 and the first hot air passage 9 is adjusted. 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 cool air passage 7 and the first warm air passage 9, are adjusted. The blowout from the front heat outlet 4a and the rear heat outlet 4b is adjusted at 6 degrees.

The first rotary damper 12b has a
Rotate around the rotation axis while always sliding the part shown in
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 the cool air and the amount of the hot air into the first air mix chamber 15 are determined to be arbitrary amounts, the temperature flowing into the first air mix chamber 15 is reduced. Wind is the first rotary damper 12
The airflow direction is changed along the curved shape of b, and the airflow collides with the cool air flowing into the first air mix chamber 15 through the first cool air passage 7. As a result, the cold air and the hot air are mixed firmly in the first air mix chamber 15, and the air whose temperature has been reliably adjusted is blown out from the front heat outlet 4a and the rear heat outlet 4b into the vehicle interior.

The curved rotary members 13a and 13b share a rotary shaft (not shown) connected to a servo motor (not shown) and are rotatably disposed about the rotary shaft. It is a damper (see FIG. 2). That is, 13a and 13b are linked.

The second rotary damper 13a rotates about the rotation axis while always sliding on the upper end surface of the heater core 3 in the drawing, and opens the second cold air passage 8 and the second hot air passage 10. Adjust the area ratio. By adjusting the opening area ratio, the amount of the cool air and the amount of the warm air flowing into the second air mix chamber 17, which is the intersection of the second cool air passage 8 and the second warm air passage 10, are adjusted. The outlet temperature from the vent outlet 5 is adjusted.

The second rotary damper 13b is connected to
Rotate around the rotation axis while always sliding the part shown in
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 air outlet 6 is controlled by the opening degree of a differential damper 19 provided in the differential passage 11.

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

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 sectional view taken along a line AA in FIG.
It is arrow sectional drawing. As shown in FIG. 2A, the first rotary damper 12 is formed by cutting out a hollow cylinder having an upper bottom and a lower bottom, and cutting out a portion shown in FIG. That is, the portion indicated by reference numeral 21 in the drawing is capable of ventilating in the direction perpendicular to the paper surface.

The rotating shafts 24 are provided on the upper bottom 22 and the lower bottom 23, respectively.
, The first rotary damper 12 is rotatable. A servo motor (not shown) (see FIG. 3) is connected to one of the rotating shafts 24.
The first rotary damper 12 is rotated by the rotation of the rotary shaft 24 by the motor.

Although only the air conditioner unit is shown in FIG. 1, a blower unit for generating air in the 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 the blower unit and the right half is the air conditioner unit. In the blower unit, reference numeral 26 denotes an inside air inlet for taking in air in the vehicle compartment into the blower unit, and reference numeral 27 denotes an outside air inlet for taking air outside the vehicle compartment into the blower unit.
Control of whether to take in air from inside or outside of the vehicle compartment is performed by an inside / outside air switching damper (not shown). Reference numeral 28 denotes a blower case for housing a blower for generating an air flow, and reference numeral 29 denotes a part of a blower motor for driving the blower. Then, the airflow generated by the blower is blown through the communication case 30 to the portion shown in FIG. In the drawing, reference numeral 31 denotes a first service for driving the first rotary damper 12.
Reference numeral 32 denotes a second servo motor for driving the second rotary damper 13, and arrows in the drawing indicate 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 a control system of this embodiment. An output signal _Tr from the inside air sensor 33 for detecting the temperature inside the vehicle compartment, and an outside air sensor 34 for detecting the temperature outside the vehicle compartment.
The output signal from the T _am, the output signal T _s from the solar radiation sensor 35 for detecting the intensity of the position and the solar radiation of the sun, the output signal T _setr from the right temperature setter 36 for setting the indoor temperature of the driver's seat, and The output signals T _setl from the left-side temperature setting device 37 for setting the passenger room temperature are all set by the ECU.
38.

The ECU 38 has a central processing unit (CP)
U), a known microcomputer having a ROM, a RAM, and an input / output interface. Then, arithmetic processing is performed according to a predetermined program and map based on the output signals, and the blower motor 29, the first servo motor 31, and the second servo motor are processed.
And outputs a signal for controlling a servo motor 41 for driving an internal / external air switching damper (not shown).

Based on each of the output signals, the microcomputer obtains the required blowing temperature TA of the driver's seat by using a predetermined formula such as the following formulas 1 and 2.
Calculate Or and the required outlet temperature TAOl of the passenger seat.

[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 (both are collectively referred to as TAO)
Is determined, the voltage applied to the blower motor 29 is determined in order to determine 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.

A switching control signal for switching between inside air and outside air;
The control signal to the rotary damper 12 and the control signal to the second rotary damper 13 are also obtained according to the above TAO.

FIG. 6 is a front view showing an air conditioner panel used in this embodiment. In FIG. 6, reference numeral 39 denotes a blower switch for adjusting the blower blow-off air volume when the air conditioner is used manually instead of automatically. When the air-conditioner is turned counterclockwise from the position shown in the drawing, the air volume becomes smaller. The air volume increases. Reference numeral 40 denotes a right side vent switch for adjusting the outlet temperature and the amount of the outlet air only at the vent of the driver's seat when the outlet mode is the bi-level mode. I do. Turning clockwise increases the temperature and decreases the air volume. Reference numeral 41 denotes a left vent switch for adjusting the outlet temperature and the outlet air volume of only the vent on the passenger seat when the outlet mode is the bi-level mode. I do. Turning clockwise increases the temperature and decreases the air volume.

The operation of the present embodiment in the above-described configuration will be described below with reference to the drawings. In addition,
The following description relates only to the driver's seat, and the description of the passenger seat is omitted.

For example, as shown in FIG. 7 left, 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 Moves to the position shown on the right side of FIG. In other words, a vent mode in which all the front heat outlets 4a and the rear heat outlets 4b (hereinafter, both are collectively referred to as the heat outlets 4) are shut off, and the vent outlets 5 are all opened. Further, since the second rotary damper 13 blocks the second hot air passage 10 and the second air mix chamber 17, the vent outlet 5
The temperature of the air blown out of is the lowest. The differential damper 19 shuts off all the differential air outlets 6.

With the right vent switch 40 fixed at the intermediate position, the set temperature is gradually increased, and when the room temperature is set to 22 ° C. as shown on the left side of FIG. 8, the first rotary damper 12 and the second rotary damper Reference numeral 13 moves to the position shown on the right side of FIG. That is, the first rotary damper 12
Has about half opening of the heat outlet 4 and opens the first cold air passage 7 and the first hot air passage 9 so as to take in both the cold air and the hot air into the first air mixing chamber 15. Further, the second rotary damper 13 opens the vent outlet 5 and the differential passage 11 about half each, and the second cold air passage 8 and the second cold air passage 8 so as to take in both the cold air and the hot air into the second air mixing chamber 17. The hot air passage 10 is opened. At this time, the differential damper 19 is located at the differential outlet 6.
, A little air flows from the differential outlet 6 into the vehicle interior.

Similarly, while the right vent switch 40 is fixed, the set temperature is changed, and when the room temperature is set to 28 ° C. as shown in FIG.
The second and second rotary dampers 13 move to the positions shown on the right in FIG. That is, the heat mode is such that all the heat outlets 4 are opened and all the vent outlets 5 are shut off. Since the first cool air passage 7 and the second cool air passage 8 are all shut off by the first rotary damper 12 and the second rotary damper 13, the temperature of air blown from the heat outlet 4 and the differential outlet 6 becomes highest. At this time, the differential damper 19
Slightly opens the differential outlet 6.

When the mode is switched from auto to differential, such as when the window glass suddenly becomes cloudy while driving the vehicle,
The first rotary damper 12 and the second rotary damper 13 move to the positions shown in the right of FIG. That is, the first rotary damper 12 shuts off all the heat outlets 4 and the second
The rotary damper 13 shuts off all the vent outlets 5. Then, the differential damper 19 opens all the differential air outlets 6.

Further, in this embodiment, the configuration is such that the vertical independent temperature control can be performed in addition to the left and right independent temperature control. As shown in the left of FIG.
6, when the indoor temperature is set to 22 ° C. and the position of the right vent switch 40 is set to the middle position, if the driver feels uncomfortable with the vent blowout wind, the position of the right vent switch 40 is adjusted. This discomfort can be eliminated. The right side of FIG.
6 shows the positions of the first rotary damper 12 and the second rotary damper 13 when the right vent switch 40 is set to the left position in FIG.

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 on the left in FIG. 11, the right vent switch 40 is moved to the left in FIG. What is necessary is just to rotate counterclockwise as shown. Then, as shown in the right of FIG. 12, the first rotary damper 12 does not move, whereas only the second rotary damper 13 rotates counterclockwise. as a result,
The second rotary damper 13 gradually opens the second cool air passage 8 at the same time as gradually blocking the second warm air passage 10. Eventually, the vent outlet temperature becomes the lowest. In addition, the opening area of the vent outlet 5 gradually increases, and finally the vent air volume reaches a maximum.

Since the vent air temperature and vent air volume can be controlled by the degree of turning of the right vent switch 40, the degree of turning of the right 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, if the driver feels a cold sensation in the upper body, the right vent switch 40 may be rotated clockwise as shown in FIG. Then, as shown on the right side of FIG. 13, the first rotary damper 12 does not move, whereas only the second rotary damper 13 rotates clockwise. As a result, the second rotary damper 13 gradually opens the second hot air passage 10 and at the same time
Is gradually cut off. Finally, the temperature in the second air mix chamber 17 becomes the highest. Further, the second rotary damper 13 gradually shuts off the vent outlet 5, and finally, no air is blown out from the vent outlet 5.

As described above, the right vent switch 4
By turning 0 clockwise, the vent outlet temperature gradually increases, and the vent outlet air volume gradually decreases.
Therefore, by adjusting the degree of turning of the right vent switch 40 in accordance with the cooling sensation felt in the upper body of the driver, and lowering the vent outlet temperature and at the same time reducing the air volume, the above cooling sensation can be eliminated.

As described above in detail, in the present embodiment, the first rotary damper and the second rotary damper are formed in a curved shape, so that the first rotary damper and the second rotary damper are firmly provided in the first air mix chamber and the second air mix chamber. Cold air and hot 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 servomotor. Rotary damper 12
a and the first rotary damper 12b are separate services.
This leads to a cost reduction compared to driving by a motor. The same effect can be obtained for the second rotary damper 13a and the second rotary damper 13b.

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

[Brief description of the drawings]

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

FIG. 2 is a view showing a shape of a first rotary damper in the embodiment, FIG. 2 (a) is a side view, and FIG. 2 (b).
FIG. 2 is a cross-sectional view taken along the line AA in FIG.

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

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

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

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

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

FIG. 8 is a schematic diagram showing the position of each rotary damper in the bilevel mode in the embodiment.

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

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

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

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

[Explanation of symbols]

2 evaporator which is an evaporator 3 heater core which is a heater 4 heat outlet which is an outlet 5 vent outlet which is an outlet 7 first cold air passage which is a cool air passage 8 second cold air passage which is a cool air passage 9 temperature The first hot air passage which is a wind passage 10 The second hot air passage 12a which is a hot air passage 12a The first rotary damper 13a which is a cool / hot air ratio adjusting means 13a The second rotary damper 12b which is a cold / hot air ratio adjusting means The first which is a barrier Rotary damper 13b Second rotary damper 15 as a barrier 15 First air mix chamber as an intersection 17 Second air mix chamber as an intersection

Claims (1)

(57) [Claims] An evaporator that cools the blown air; a heater that heats the air; a cool air passage through which the cool air cooled by the evaporator bypasses the heater; A hot air passage through which the warm air heated by the hot air flows, an intersection where the cold air passage intersects with the hot air passage, and a ratio between the amount of the cold air flowing to the intersection and the amount of the hot air. A cool / hot air ratio adjusting means; an outlet formed downstream of the intersection, for blowing the air into which the ratio of the amount of the cold air to the amount of the warm air is adjusted into the vehicle interior; and an outlet provided at the intersection. And forming a curved shape, rotating in the curved direction, and guiding one of the cold air and the hot air so that the cold air and the hot air are substantially opposed to each other. A barrier for controlling an opening area of the outlet by movement. Air conditioning system, characterized in that.