JPH07186688A - Air conditioner for vehicle - Google Patents

Abstract

PURPOSE:To maintain the comfortable blow-out air temperature and carry out the proper independent control with the simple constitution, by controlling the air temperature in the first chamber separately from the second chamber, by an air temperature sensor in the first chamber, in the first and the second chambers which correspond to the downstream side and upstream side of the cooling water passage of a ventilating duct. CONSTITUTION:A duct 10 on he downstream of an air mixing part 20 equipped with a heater core is divided to the first chamber 27 on the downstream side of an engine cooling water passage and the second chamber 28 on the upstream side of the engine cooling water passage, by a partitioning wall 26, and both chambers are allowed to correspond to a driver's seat side 35 and an assistant driver's seat side 36, respectively. Further, an air temperature sensor 40 is installed on the first chamber 27 side where the influence of the temperature variation of the engine cooling water is given, and the air temperature on the first chamber 27 side is controlled by driving an air mixing door 22 separately from the second chamber 28, on the basis of the result of the detection of the air temperature sensor 40. Accordingly, the comfortable blow-out temperature can be maintained with the simple constitution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air mix type vehicle air conditioner.

[0002]

2. Description of the Related Art Conventionally, there has been proposed a vehicle air conditioner in which air conditioning control is performed in a state in which the blowing temperature on the driver side is set lower than the blowing temperature on the passenger side by a desired temperature. In other words, it is said that it is preferable from the standpoint of vehicle safety to blow air-conditioned air at a temperature slightly lower than that of the passenger in the passenger seat, focusing on the driver's operation and giving the driver a nervous state. This is because

Japanese Patent Application Laid-Open No. 58-122213 discloses, for example, Japanese Patent Application Laid-Open No. 58-122213.
A vehicle air conditioner as shown in FIG. 12 is disclosed.

That is, the arithmetic control circuit 60 obtains the target outlet temperature TA based on the outside air temperature T0, the vehicle interior temperature Tr, and the amount of solar radiation ST which are the detection results from the outside air sensor 62, the inside air sensor 63, and the sunshine amount sensor 64. In addition, the arithmetic control circuit 60 calculates the target outlet temperature TAR of the right outlet that is the driver side outlet and the target outlet temperature TAL of the left outlet that is the passenger side outlet, and calculates the right outlet The damper opening (damper position) of the air mix damper 65 for the right side and the air mix damper 66 for the left side is obtained so that the blowout temperature and the blowout temperature of the left side outlet become the target blowout temperatures. Here, the ventilation duct 74 is a partition plate 75.
The air mix damper 65 for the right side and the air mix damper 66 for the left side are arranged with the partition plate 75 sandwiched therebetween.

After calculating the damper opening, the arithmetic control circuit 60 sets the opening of the left and right air mix dampers 65 and 66 via the left and right damper actuators 67 and 68.
Further, in the arithmetic control circuit 60, the fan 69 sets the target outlet temperature T
When a control signal is given to the fan speed control device 61 so as to rotate at the optimum fan speed corresponding to A, the fan motor 70
Is driven at the optimum fan speed at that time.

Thus, for example, the right vent outlet 7
The air having the blowout temperature TAR = TA− (ΔT / 2) is blown from 1 toward the driver, and the left vent outlet 72 is provided.
Since the air with the blowout temperature TAL = TA + (ΔT / 2) is blown toward the passenger seat occupant, the driver side must be set to a blowout temperature that is always lower than the passenger side by the set temperature difference ΔT. become.

Further, the air volume to the side not exposed to the sunlight is kept constant, for example, by keeping the air volume to the side not exposed to the sunlight in accordance with the temperature of the vehicle interior, and the air volume to the side exposed to the sunlight is increased to impair the passenger's feeling. An air conditioning control that does not exist is also proposed.

As a device for performing such air conditioning control, for example, Japanese Utility Model Laid-Open No. 2-102807 discloses a control device for an automobile air conditioning device as shown in FIG.

That is, the air sent into the ventilation duct 61 by the blower motor 60 is the air mix section 6
After passing through 2, the air is blown out from the respective air outlets 66, 67 according to the opening amounts of the dampers 63, 64. On the other hand, the air blown out according to the opening amount of the damper 65 is controlled by the opening control of the air distribution door 68, and the air outlets 69, 70,
The air volume from 71 is controlled. At this time, the fixed position of the air distribution door 68 is on the same line as the partition 72, and when the air distribution door 68 rotates in the arrow direction, for example,
Since the airflow resistance of the partition 72 in the upper direction increases, the air volume on the air outlet 69 side decreases, and conversely, the air volume on the air outlet 71 side increases. On the other hand, at the air outlet 70, the sum of the air volume indicated by the solid line arrow and the air volume indicated by the broken line arrow is constant regardless of the rotation of the air distribution door 68.

Therefore, in such an air conditioner, the amount of air blown in a specific direction can be maintained and the amount of air blown in another direction can be changed. For example, the amount of air blown to the side not exposed to insolation is made constant. In this state, it is possible to increase the air volume to the side on which the sunlight is hitting, so that the feeling of the occupant is not impaired.

[0011]

As described above, in the above-described conventional vehicle air conditioner shown in FIG. 12, the inside of the ventilation duct 74 is divided into the right vent outlet 71 side and the left vent outlet 72 side by the partition plate 75. Since it is divided into two, it is possible to blow air with a temperature difference from both outlets 71, 72.

However, in such a vehicle air conditioner, the inside of the ventilation duct 74 is partitioned by the partition plate 75,
The air passages to the left and right outlets 71, 72 are merely divided, and when the air is blown with a preset temperature difference ΔT, the air blow temperature is likely to change due to changes in the external environment, etc. Air-conditioning control may not be performed properly due to the temperature difference.

Further, in the air conditioner of FIG. 13, the air distribution door 6
Although the air volume is changed by changing the ventilation resistance when the opening degree is controlled by No. 8, if the air volume of one air outlet side is changed, the air volume of the other air outlet side is affected by the configuration. There was a problem that the air volume changed on the side that did not need to be changed.

The present invention has been made in consideration of such a situation, and has a simple construction, which can maintain a comfortable blowing air temperature and can appropriately perform independent air volume control. The purpose is to provide a device.

[0015]

In order to achieve the above object, the vehicular air-conditioning system according to claim 1, wherein a ventilation duct downstream of a heater core that utilizes heat of engine cooling water is provided in the engine cooling water. A first room corresponding to the downstream side of the passage for the driver seat and the ventilation duct,
A second room corresponding to the upstream side of the passage of the engine cooling water and for the passenger side, and an air temperature sensor arranged in the first room downstream of the engine cooling water, An air temperature control means for controlling the air temperature of the first room side separately from the air temperature of the second room based on the detection result of the air temperature sensor is provided.

A vehicle air conditioner according to a second aspect of the present invention is a vehicle air conditioner for sending outside air or inside air into a vehicle compartment by a blower motor through a ventilation duct, and an operation formed by partitioning the inside of the ventilation duct by a partition wall. A first room for the seat side, a second room for the passenger side formed by the partition wall, and a partition wall which are provided in the partition wall, and the air flow resistance of the first room and the second room In the case of decreasing the air flow rate changing means for changing the air flow rate in one of the first room and the second room, the air flow rate of the room to be reduced by the air flow rate changing means is increased, and When the rotation speed of the blower motor is decreased and, on the contrary, the air volume of one of the above is increased, the ventilation resistance of the room to be increased is decreased by the air volume changing means. , Characterized in that the air volume control means for increasing the rotational speed of the blower motor is provided.

[0017]

In the vehicle air conditioner of the present invention, the change in the air temperature at the downstream side of the engine cooling water passage due to the temperature change of the engine cooling water which is changed by the opening degree control at the upstream side of the engine cooling water passage is performed. This is intended to be prevented, and the temperature detected by a wind temperature sensor arranged on the first room side, which is the downstream side of the passage of the engine cooling water affected by the temperature change, is fed back to the first room. The side air temperature can be controlled separately from the air temperature in the second room.

Further, in the vehicle air conditioner of the present invention, when the air volume of one of the two is changed, it is intended to eliminate the influence on the air volume of the other one, that is, either the first room or the second room. When decreasing one of the air volumes, increase the ventilation resistance of the room on the side you want to reduce, decrease the rotation speed of the blower motor, and conversely, if you increase one of the air volumes, you want to increase it by the air volume changing means. The ventilation resistance of the room on the side is reduced and the rotation speed of the blower motor is increased.

Therefore, when the other air volume tends to increase, the overall air volume decreases due to the decrease in the rotation speed of the blower motor, and when the other air volume tends to decrease, the overall speed increases due to the increase in the rotation speed of the blower motor. As the air volume is increased, it does not affect the other air volume,
It is possible to control one of the air volumes.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of a vehicle air conditioner according to the present invention. FIG. 1 shows an upstream side of a ventilation duct, and FIG. 2 shows a downstream side of the ventilation duct. As shown in these drawings, an inside / outside air switching damper 12 whose opening / closing operation is controlled by a suction port switching servomotor 11 is provided on the upstream side of the ventilation duct 10, and the outside air or the inside air is driven by a blower motor 13. It is adapted to be fed into the ventilation duct 10.

The drive of the blower motor 13 is controlled by the fan control amplifier 14 supplied with a control signal from the heater control unit 50. A setting signal from the temperature setting unit 51 is supplied to the heater control unit 50, and the heater control unit 50 controls the drive of the blower motor 13 according to the setting signal.

The air sent by the blower motor 13 passes through the evaporator 15 and then the air mix section 20.
Pass through. An air temperature sensor 15a is arranged on the downstream side of the evaporator 15, and the temperature detected by the air temperature sensor 15a is taken into the heater control unit 50. Here, the air mix section 20
Is configured as shown in FIG. 3, and includes a heater core 21 and air mix doors 22 and 23. The opening and closing of the air mix doors 22 and 23 are controlled by the air mix servomotors 24 and 25.

A defroster outlet 16 is provided on the downstream side of the air mix section 20, and the defroster damper 1 is provided.
Air is blown to a windshield (not shown) according to the opening / closing amount of 7. Here, the ventilation duct 10 on the downstream side of the air mix section 20 is divided into a first room 27 and a second room 28 by a partition wall 26, and the above air mix doors 22 and 23 are respectively provided with a first room 27 and a second room 28. The first room 27 and the second room 28 are arranged so as to correspond to each other. Also, the air mix doors 22 and 23
Are located on the downstream side and the upstream side of the passage of the engine cooling water, respectively. The opening / closing amount of the air volume switching door 19 provided on the partition wall 26 is controlled by driving the air volume switching servomotor 18.

An air temperature sensor 40 is disposed downstream of the air mix door 22, and the detection result detected by the air temperature sensor 40 is the heater control unit 5.
Feedback is set to 0.

The first room 2 downstream of the air volume switching door 19
7, a driver seat side heat damper 30 and a driver seat side vent damper 31 controlled by a switching servomotor 29 are provided. In the second chamber 28 on the downstream side of the air volume switching door 19, a passenger seat side heat damper 33 and a passenger seat side vent damper 34 controlled by a switching servomotor 32 are provided.

A driver seat side vent outlet 35 and a passenger seat side vent outlet 36 are provided at the end portions of the first chamber 27 and the second chamber 28. Driver side vent outlet 3
5 and a passenger seat side sunshine sensor 41 and a passenger seat side sunshine sensor 42 are provided near the passenger seat side vent outlet 36.

Next, the operation of the vehicle air conditioner having such a configuration will be described. First, the temperature control on the passenger side will be described with reference to FIGS. 4 and 5. That is, when the temperature A is set by the temperature setting unit 51 during the operation of the vehicle air conditioner (step 501), the heater control unit 50 causes the air mix servomotor 25 to output the air mix opening signal a ( = A /
M) is output (step 502). As a result, the opening degree of the air mix door 23 corresponding to the second room 28, which serves as an air passage to the passenger seat side, is controlled.

On the other hand, the temperature control on the driver's side is shown in FIG.
When the temperature B is set by the temperature setting unit 51 (step 601), the heater control unit 50 causes the air mix servomotor 24 to output the air mix opening signal b (= A) corresponding to the temperature B. / M)
Is output (step 602). As a result, the air mix door 2 of the first room 27, which serves as a ventilation path to the driver's seat side
The opening of 2 is controlled. At this time, the heater control unit 50 detects the temperature β detected by the wind temperature sensor 40 arranged on the downstream side of the air mix door 22.
Is taken in (step 603), and the detected temperature β taken in is compared with the temperature B set by the temperature setting unit 51. When the detected temperature β is lower than the temperature B (step 604), a small value c is added to the air mix opening signal b (= A / M) (step 605), and the added air mix opening signal is added. The opening of the air mix door 22 is controlled by driving the air mix servomotor 24 by b.

As described above, in this embodiment, the engine cooling water passage is controlled by the opening degree control on the upstream side of the engine cooling water so that the temperature is controlled separately for the driver seat side and the passenger seat side. The change of the air temperature on the downstream side of the passage of the engine cooling water due to the temperature change is prevented. Therefore, the ventilation duct 10 corresponds to the downstream side of the passage of the engine cooling water and is used for the driver's seat side in the first room 27.
And a second room 28 corresponding to the upstream side of the passage of the engine cooling water and used for the passenger side, and at the side of the first room 27 affected by the temperature change of the engine cooling water. An air temperature sensor 40 is provided, and this air temperature sensor 4
The air temperature on the side of the first room 27 was controlled based on the detection result of 0.

Therefore, the wind temperature on the driver's seat side and the passenger's seat side can be individually adjusted by the feedback of the detected temperature from the air temperature sensor 40 arranged on the first room 27 side, so that the structure is simple. Moreover, a comfortable blowing air temperature is maintained.

FIG. 7 shows the air volume switching door 19 described above, which has a fan-shaped cross section, and another embodiment in which the opening degree of the air volume switching door 19 is controlled will be described below.

That is, when the air volume switching door 19 is turned to the side of the first room 27 or the second room 28, the ventilation duct 1
The airflow resistance is changed by blocking the wind flowing inside the 0 by the side surface 19a or 19b.

FIG. 8 shows the heater control unit 5
0 shows the internal configuration of 0, and the set value x (%: amount of increase / decrease) by the temperature setting unit 51 is the blower rotation speed setting unit 5.
Taken in 2. The blower rotation speed setting unit 52 sets the blower rotation speed N based on the set value set by the temperature setting unit 51, and outputs the blower rotation speed N to the air volume switching door protrusion amount calculation unit 53 and the blower motor 13. Air volume switching door projection amount calculation unit 5
3 determines the projection amount α of the air volume switching door 19 into the first chamber 27 or the second chamber 28 based on the blower rotational speed N from the blower rotational speed setting unit 52, and determines the opening degree of the air volume switching door 19. To control.

Here, the blower rotation speed N based on the set value x by the temperature setting section 51 is obtained by N = 100 ± x + 100 (1). For example, the air volume A on the side of the first room 27 is obtained by A = ((100 ± x) / 100) · B ... (2). On the other hand, the air volume B on the second room 28 side
Is fixed as B = 100 ... (3). Further, the air volume A corresponding to the projection amount of the air volume switching door 19 is obtained by A = N · (100 + α) / 200 (4). At this time, the air volume B according to the amount of protrusion of the air volume switching door 19 is fixed as follows: B = N · (100−α) / 200 (5) The calculation procedure is (3),
From the equation (5), 100 = N · (100−α) / 200, and by expanding it, α = 100−20000 / N (6), and by substituting N into this (6), The amount of protrusion of the air volume switching door 19 is obtained.

Next, the operation of the vehicle air conditioner having such a configuration will be described. In the drawings described below, the respective air volumes when the air volumes of the first room 27 and the second room 28 are the same are 100 for convenience of explanation.
I am trying.

First, when the air volumes in the first room 27 corresponding to the driver's seat side and the second room 28 corresponding to the passenger seat side are the same, as shown in FIG.
Is located in the center of the first room 27 and the second room 28. The blower rotation speed N at this time is calculated from the above formula (1) by
100 + 100 = 200.

When it is desired to halve the air volume only on the side of the first room 27 corresponding to the driver's seat side, the opening control with the protrusion amount α = 67 of the air volume switching door 19 as shown in FIG. 10 is performed. Done. That is, the blower rotation speed N is calculated as 100 (passenger seat side) +100/2 (driver seat side) = 150 from the above formula (1).

The protrusion amount α of the air volume switching door 19 is obtained as α = 67 by the above equation (6). By the way, the air volume A on the side of the first room 27 is calculated from the equation (4) above.
It is calculated as A≈50. On the other hand, the air volume B of the second room 28 is calculated as B≈100 by the same formula.

Further, when it is desired to increase only the driver's seat side by 30%, as shown in FIG. 11, the opening degree control is performed with the protrusion amount α = 13 of the air volume switching door 19. That is, the blower rotation speed N is N = 2 from the above equation (1).
Required as 30.

The protrusion amount α of the air volume switching door 19 is obtained as α = 13 by the above equation (6). By the way, the air volume A on the side of the first room 27 is calculated from the equation (4) above.
It is calculated as A≈130. On the other hand, the air volume B of the second room 28 is calculated as B≈100 by the same formula.

As described above, in this embodiment, when the air volume of one of the first chamber 27 and the second chamber 28 is reduced while eliminating the influence on the other air volume, the amount of protrusion of the air volume switching door 19 is reduced. Is increased to increase the ventilation resistance, and the rotation speed of the blower motor 13 is decreased, and conversely, when either one of the air volumes is increased, the projection amount of the air volume switching door 19 to the room on the side to be increased is decreased. At the same time, the rotation speed of the blower motor 13 is increased.

Therefore, when the other air volume tends to increase, the overall air volume decreases due to the decrease in the rotation speed of the blower motor 13. When the other air volume tends to decrease, the rotation speed of the blower motor 13 increases. Since the overall air volume is increased, it is possible to control one air volume without affecting the other air volume.

[0043]

As described above, according to the vehicle air conditioner of the present invention, the engine cooling water passage due to the temperature change of the engine cooling water which is changed by the opening degree control on the upstream side of the engine cooling water passage. The temperature detected by the wind temperature sensor disposed on the first room side, which is the downstream side of the passage of the engine cooling water affected by the temperature change, is intended to prevent the change of the wind temperature on the downstream side of the engine. By feeding back the air temperature in the first room, the air temperature in the first room can be controlled separately from the air temperature in the second room.

Therefore, the wind temperature on the driver's seat side and the passenger's seat side can be individually adjusted by the feedback of the detected temperature from the wind temperature sensor arranged on the first room side, so that the structure is simple and comfortable. It is possible to maintain a proper blowing air temperature.

When changing the air volume of either one, it is intended to eliminate the influence on the air volume of the other,
When reducing the air volume of either the first room or the second room, the airflow resistance of the room on the side to be reduced is increased, and the rotation speed of the blower motor is reduced. When increasing, the ventilation resistance of the room on the side to be increased is decreased by the air volume changing means, and the rotation speed of the blower motor is increased.

Accordingly, when the other air volume tends to increase, the overall air volume decreases due to the decrease in the rotation speed of the blower motor, and when the other air volume tends to decrease, the overall speed increases due to the increase in the rotation speed of the blower motor. As the air volume is increased, it does not affect the other air volume,
Since one air volume can be controlled, independent air volume control can be appropriately performed.

[Brief description of drawings]

FIG. 1 is a diagram showing an upstream side of a ventilation duct according to an embodiment of a vehicle air conditioner of the present invention.

FIG. 2 is a diagram showing a downstream side of the ventilation duct in FIG.

FIG. 3 is a perspective view showing a configuration of an air mix section shown in FIGS. 1 and 2.

FIG. 4 is a diagram for explaining the operation of the vehicle air conditioner of FIG. 1.

5 is a flow chart for explaining the operation of the vehicle air conditioner of FIG.

FIG. 6 is a flowchart for explaining the operation of the vehicle air conditioner of FIG.

FIG. 7 is a perspective view showing the air volume switching door of FIG.

8 is a block diagram showing details of a heater control unit in FIG. 1. FIG.

FIG. 9 is a view for explaining the operation of the heater control unit of FIG.

10 is a diagram for explaining the operation of the heater control unit of FIG.

FIG. 11 is a diagram for explaining the operation of the heater control unit of FIG.

FIG. 12 is a diagram showing an example of a conventional vehicle air conditioner.

FIG. 13 is a diagram showing a configuration example of a conventional vehicle air conditioner.

[Explanation of symbols]

 10 Ventilation duct 11 Suction port switching servo motor 12 Inside / outside air switching damper 19 Air volume switching door 20 Air mix section 21 Heater core 22,23 Air mix door 27 First room 28 Second room 40 Air temperature sensor 50 Heater control unit 51 Temperature Setting unit 52 Blower rotation speed setting unit 53 Air volume switching door protrusion amount calculation unit

Claims (2)

[Claims] 1. A first room in which a ventilation duct on the downstream side of a heater core that uses heat of engine cooling water corresponds to a downstream side of a passage of the engine cooling water and is for a driver's seat, A ventilation temperature is provided in a second room corresponding to the upstream side of the engine cooling water passage and for the passenger seat side, and in the first room downstream of the engine cooling water. A sensor and an air temperature control means for controlling the air temperature of the first room side separately from the air temperature of the second room based on the detection result of the air temperature sensor. Characteristic vehicle air conditioner. 2. An air conditioner for a vehicle, which sends outside air or inside air into a vehicle compartment by a blower motor through a ventilation duct, and a first room for a driver's seat formed by partitioning the inside of the ventilation duct by a partition wall. A second room for the passenger side formed by the partition wall, and an air volume changing means provided in the partition wall for changing the air volume of the first room and the second room by increasing or decreasing ventilation resistance, When reducing the air volume of either one of the first room and the second room, the ventilation resistance of the room on the side to be reduced is increased by the air volume changing means, and the rotation speed of the blower motor is reduced, and vice versa. In the case of increasing one of the air volumes, the air flow rate changing means reduces the ventilation resistance of the room on the side to be increased, and the rotation speed of the blower motor is increased. Vehicle air-conditioning apparatus characterized by the air volume control means for increasing is provided.