JP2005059756A - Vehicular air-conditioning control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce noise of an in-vehicle air introduction fan without degrading the performance of an in-vehicle air temperature detection means. <P>SOLUTION: The vehicular air-conditioning control device comprises an air cooling means to cool air, an air heating means to heat air, a blower fan to feed air, an in-vehicle air temperature detection means to detect the air temperature in a cabin, and an in-vehicle air introduction fan to introduce the in-vehicle air to the in-vehicle air temperature detection means. The in-vehicle air is introduced to the in-vehicle air temperature detection means by the in-vehicle air introduction fan to detect the in-vehicle temperature. the air cooling means, the air heating means and the blower fan are controlled so that the detected in-vehicle air temperature reaches the set value. A voltage setting means is provided, which sets the in-vehicle air introduction fan motor voltage to be applied to an in-vehicle air introduction fan motor of the in-vehicle air introduction fan so as to be changed according to the blower fan motor voltage to be applied to a blower fan motor of the blower fan. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vehicle air-conditioning control device, and more particularly to a vehicle air-conditioning control device that can reduce the noise of an inside air introduction fan without degrading the performance of the inside air temperature detecting means.

  Some vehicles are provided with a vehicle air-conditioning control device in order to make the environment in the passenger compartment comfortable and to prevent fogging and frosting of windows.

  The vehicle air conditioning control device includes an air cooling means for cooling air, an air heating means for heating air, a blower fan for pressure-feeding air, an inside air temperature detecting means for detecting the inside air temperature in the passenger compartment, and this inside air temperature detecting means. An inside air introduction fan for guiding inside air, the inside air is introduced to the inside air temperature detection means by the inside air introduction fan to detect the inside air temperature, and the air cooling means and the air heating means so that the detected inside air temperature becomes a set temperature. There is a so-called auto air conditioner that controls the blower fan.

Such a vehicle air conditioning control device includes at least a control means for determining a deviation from a temperature setter and an in-vehicle temperature sensor, an aspirator fan for sending air to the in-vehicle temperature sensor, and a control signal from the control means. Some have variable speed means that varies so as to increase the motor rotation speed of the aspirator fan until the deviation between the set temperature and the room temperature becomes a certain value or less when the air conditioner is started.
Further, the conventional vehicle air conditioning control device is provided with an indoor air sensor at a position where a negative pressure is generated by the operation of a cooler blower that supplies room air to the evaporator, and an internal air sensor motor and a fan that send the indoor air to the indoor air sensor are provided. When the cooler blower is activated, the temperature of the indoor air sucked by negative pressure is detected by the room temperature sensor, and when the cooler blower is stopped, the temperature of the room air forcedly sucked by the motor and fan for the room air sensor is detected by the room temperature sensor. There is something to do.
Further, in a conventional vehicle air conditioning control device, a motor for driving a fan for sucking air in the passenger compartment and an air temperature sensor for detecting the air temperature of the air flow generated by the fan are attached to the room temperature detection aspirator frame. The connection terminal for connecting the motor to the power supply and the connection terminal for connecting the temperature sensor to the control circuit are directly connected to the wiring of the printed circuit board provided behind the operation panel in the vehicle interior. In addition, there is one that protrudes from the outer surface of the aspirator frame.
JP-A-60-255520 JP 7-89329 A Japanese Utility Model Publication No. 5-505

  By the way, in the vehicle air control apparatus provided with the inside air introduction fan that guides the inside air to the inside air temperature detecting means, there is a problem that noise is generated according to the air volume supplied by the inside air introduction fan.

  Especially when the vehicle interior is quiet, such as when the blower fan is stopped or driven at a low speed, or when the radio is turned off or listening at a low volume, the wind noise generated by the inside air introducing fan is There is a problem that sounds loud.

  In order to avoid the problem of the noise of the inside air introduction fan, if the inside air introduction fan is abolished, the inside air cannot be guided to the inside air temperature detecting means. There is a problem that the temperature of the inside air cannot be accurately detected due to a difference between the inside air temperature and the reliability of the detected value is lowered.

  For this reason, in the conventional vehicle air control device, there is a disadvantage that it is difficult to achieve both the performance of the inside air temperature detecting means and the noise reduction of the inside air introduction fan.

  Therefore, in order to eliminate the above-described disadvantages, the present invention provides an air cooling means for cooling air, an air heating means for heating air, a blower fan for supplying air, and an inside air temperature detection for detecting the inside air temperature in the vehicle interior. And an inside air introduction fan for introducing inside air to the inside air temperature detecting means, and the inside air is guided to the inside air temperature detecting means by the inside air introducing fan to detect the inside air temperature, and the detected inside air temperature becomes the set temperature. In the vehicle air conditioning control apparatus for controlling the air cooling means, the air heating means, and the blower fan, the inside air introduction fan motor voltage supplied to the inside air introduction fan motor of the inside air introduction fan is expressed as the blower fan blower. Voltage setting means is provided for setting to change according to the blower fan motor voltage supplied to the fan motor.

The vehicular air conditioning control device of the present invention can increase or decrease the air volume of the inside air introduction fan according to the air volume of the blower fan, thereby always guiding the inside air to the inside air temperature detecting means and accurately detecting the inside air temperature. On the other hand, if the blower fan motor voltage is low and the blower fan air volume is low, the inside air introduction fan motor voltage can be lowered to reduce the air volume of the inside air introduction fan. Can be reduced.
For this reason, this vehicle air conditioning control device can reduce the noise of the inside air introduction fan without degrading the performance of the inside air temperature detecting means.

The vehicular air conditioning control device of the present invention reduces the noise of the inside air introduction fan without degrading the performance of the inside air temperature detecting means.
Embodiments of the present invention will be described below with reference to the drawings.

  1 to 4 show an embodiment of the present invention. In FIG. 3, 2 is a vehicle air conditioning control device 2 mounted on a vehicle (not shown). The vehicle air conditioning control device 2 is provided with an air conditioning passage 6 formed by an air conditioning duct 4, and supplies air cooling means 8 for cooling air flowing through the air conditioning passage 6, air heating means 10 for heating air, and air. Air supply means 12 is provided.

  The air cooling means 8 includes at least a compressor 14 and an evaporator 16. The compressor 14 is driven via an electromagnetic clutch 18 by an engine (not shown) to compress the refrigerant. The evaporator 16 is arrange | positioned in the middle of the air-conditioning channel | path 6, and cools and dehumidifies the air which passes by the vaporization latent heat of the refrigerant | coolant compressed by the compressor 14. FIG.

  The air heating means 10 includes a heater core 20. The heater core 20 is disposed on the downstream side of the evaporator 16 and heats air using engine cooling water as a heat source.

  The air supply means 12 includes a blower fan 22. The blower fan 22 is disposed on the upstream side of the evaporator 14 and is driven by the blower fan motor 24 to blow the air in the air conditioning passage 6 into the vehicle interior.

  The heater core 20 is arranged so as to be biased to one side in the width direction intersecting the flow direction of the air conditioning passage 6. As a result, the air conditioning passage 6 where the heater core 20 is disposed is parallel to the heater core passage 26 where the heater core 20 is disposed on one side in the width direction of the air conditioning passage 6 and the heater core passage 26 on the other side in the width direction of the air conditioning passage 6. The bypass passage 28 is divided into two parts.

  An air mix damper 30 is disposed in the air conditioning passage 6 on the downstream side of the evaporator 16 and upstream of the heater core passage 26 and the bypass passage 28. The air mix damper 30 is driven by the air mix actuator 32 and distributes the air cooled and dehumidified by the evaporator 16 to the heater core passage 26 and the bypass passage 28.

  The upstream end of the air-conditioning duct 4 is branched into an inside air circulation duct 34 that introduces inside air that is air inside the vehicle compartment (not shown) and an outside air introduction duct 36 that introduces outside air that is outside the vehicle interior. An internal air circulation port 38 that communicates with the vehicle interior and an external air introduction port 40 that communicates with the outside of the vehicle interior are provided at the upstream end.

  An inside / outside air switching damper 42 is provided in the air conditioning passage 6 at a portion of the air conditioning duct 4 that branches into the inside air circulation duct 34 and the outside air introduction duct 36. The inside / outside air switching damper 42 is driven by the inside / outside air switching actuator 44 and switches the air conditioning passage 6 so that either the inside air circulation port 38 or the outside air introduction port 40 communicates.

  The downstream end of the air-conditioning duct 4 is branched into a defrost duct 46, a vent duct 48, and a foot duct 50 for introducing the air in the air-conditioning passage 6 into the vehicle interior. A defrost outlet 52, a vent outlet 54, and a foot outlet 56 are provided.

  A defrost outlet damper 58, a vent outlet damper 60, and a foot outlet damper 62 are provided in the air conditioning passage 6 of the air conditioning duct 4 where the defrost duct 46, the vent duct 48, and the foot duct 50 are branched. Provided. The defrost outlet damper 58, the vent outlet damper 60, and the foot outlet damper 62 are connected to each other, and are driven by the mode actuator 64 to link the defrost outlet 52, the vent outlet 54, and the foot outlet 56 together. Open and close.

  The electromagnetic clutch 18, the blower fan motor 24, the air mix actuator 32, the inside / outside air switching actuator 44, and the mode actuator 64 are connected to the control means 66 of the vehicle air conditioning control device 2.

  The control means 66 includes an evaporator temperature sensor 68 for detecting the temperature of the evaporator 16 on the downstream side of the evaporator 16, an outside air temperature sensor 70 for detecting the outside air temperature outside the vehicle compartment, and an inside air temperature detecting means for detecting the inside air temperature inside the vehicle compartment. The inside air temperature sensor 72, the inside air introduction fan motor 76 that drives the inside air introduction fan 74 that guides the inside air to the inside air temperature sensor 72, the water temperature sensor 78 that detects the temperature of the engine cooling water, and the vehicle interior. A solar radiation amount sensor 80 for detecting the solar radiation amount and an operation panel 82 of the vehicle air conditioning control device 2 are connected to each other.

  The operation panel 82 of the vehicle air conditioning control device 2 is provided on an instrument panel (not shown) in the vehicle interior. The vehicle air-conditioning control device 2 performs ON / OFF, setting of the temperature of the air blown into the vehicle interior, and the like through the operation panel 82.

  As shown in FIG. 4, the vehicle air conditioning control device 2 is provided with an air conditioning controller case 84 on the back side of the operation panel 82. Inside the air conditioning controller case 84, an inside air introduction passage 88 is provided by a passage wall 86. The inside air introduction passage 88 is communicated with the vehicle interior by inside air inlets 90 and inside air outlets 92 at both ends. In the inside air introduction passage 88, an inside air temperature sensor 72 is provided on the inside air inlet 90 side, and an inside air introduction fan 74 and an inside air introduction fan motor 76 are provided on the inside air outlet 92 side.

  The inside air introduction fan 74 driven by the inside air introduction fan motor 76 sucks the inside air in the vehicle compartment from the inside air suction port 90 into the inside air introduction passage 88 and guides it to the inside air temperature sensor 72. The inside air after the inside air temperature is detected by the inside air temperature sensor 72 is blown out from the inside air outlet 92 into the passenger compartment.

  The vehicle air-conditioning control device 2 drives the inside air introduction fan 76 by the inside air introduction fan motor 76 by the control means 66, and the inside air introduction fan 76 guides the inside air to the inside air temperature sensor 72 to detect the inside air temperature. The air cooling means 8, the air heating means 10, and the blower fan 22 are controlled so that the inside air temperature thus set becomes the set temperature set by the operation panel 82.

  In the vehicle air conditioning control device 2, a voltage setting unit 94 is provided in the control unit 66. The voltage setting means 94 changes the inside air introduction fan motor voltage V1 supplied to the inside air introduction fan motor 76 of the inside air introduction fan 74 in accordance with the blower fan motor voltage V2 supplied to the blower fan motor 24 of the blower fan 22. Set as follows. Further, as shown in FIG. 2, the voltage setting means 94 sets the inside air introduction fan motor voltage V1 so as to increase as the blower fan motor voltage V2 increases.

  Next, the operation of this embodiment will be described.

  As shown in FIG. 1, the vehicle air-conditioning control device 2 turns on the inside air introduction fan motor voltage supplied to the inside air introduction fan motor 76 that drives the inside air introduction fan 76 when a main switch (not shown) of the operation panel 82 is turned on. The setting process of V1 is started (100), the blower fan motor voltage V2 supplied to the blower fan motor 24 that drives the blower fan 22 is read (102), and the inside air introduction fan motor voltage V1 is set (104).

  The inside air introducing fan motor voltage V1 is set by a calculation formula of V1 = A * V2 (A is a setting coefficient). At this time, the inside air introduction fan motor voltage V1 is set to increase as the blower fan motor voltage V2 increases as shown in FIG.

  It is determined whether or not the set internal air introduction fan motor voltage V1 exceeds the maximum value Vmax (106).

  When the inside air introduction fan motor voltage V1 exceeds the maximum value Vmax (V1> Vmax) and the determination (106) is YES, the inside air introduction fan motor voltage V1 is limited to the maximum value Vmax (V1 = Vmax) (108). Then, the driving process of the inside air introducing fan motor 76 is performed so that the inside air introducing fan motor voltage V1 is limited to the maximum value Vmax (110), and the processing is ended (112).

  When the inside air introduction fan motor voltage V1 is not more than the maximum value Vmax (V1 ≦ Vmax) and the determination (106) is NO, the inside air introduction fan motor 76 is driven so that the set inside air introduction fan motor voltage V1 is obtained. (110) and the process ends (112).

  The process for driving the inside air introduction fan motor 76 includes, for example, an open loop drive circuit, and outputs a pulse having a duty ratio corresponding to the set inside air introduction fan motor voltage V1 to the inside air introduction fan motor 76. The inside air introduction fan motor 76 is driven with a 100% pulse when the inside air introduction fan motor voltage V1 is 10V, and is driven with a 50% pulse when the inside air introduction fan motor voltage V1 is 5V.

  In this way, the vehicle air conditioning control device 2 supplies the inside air introduction fan motor voltage V <b> 1 supplied to the inside air introduction fan motor 76 of the inside air introduction fan 74 to the blower fan motor 24 of the blower fan 22 by the voltage setting means 94. The blower fan motor voltage V2 is set so as to change.

  That is, when the blower fan motor voltage V2 supplied to the blower fan motor 24 is high, the air volume of the blower fan 22 is large and the wind noise is large, so the inside air introduction fan motor voltage V1 supplied to the inside air introduction fan motor 76 is set. Set high. On the other hand, when the blower fan motor voltage V <b> 2 supplied to the blower fan motor 24 is low, the air volume of the blower fan 22 is small and the wind noise is small, so the inside air introduction fan motor voltage V <b> 1 supplied to the inside air introduction fan motor 76 is set. Set low.

  When the blower fan motor voltage V2 is low and the air volume of the blower fan 22 is small, the air volume of the inside air introduction fan 72 may be small and the vehicle interior thermal environment is stable. The difference from the actual inside air temperature in the passenger compartment is small, and even if the amount of inside air guided to the inside air temperature sensor 72 by the inside air introduction fan 74 is reduced, the possibility of erroneous detection is low.

  For this reason, this vehicle air-conditioning control device 2 reduces the wind noise of the inside air introduction fan 74 felt by the passenger in the vehicle interior by setting the inside air introduction fan motor voltage V1 supplied to the inside air introduction fan motor 76 to be low. At the same time, the function of the inside air temperature sensor 72 for detecting the inside air temperature can be ensured without erroneously detecting the inside air temperature in the vehicle interior.

  Thus, the vehicle air conditioning control device 2 can increase or decrease the air volume of the inside air introduction fan 74 in accordance with the air volume of the blower fan 22, and always guides the inside air to the inside air temperature sensor 72 to accurately detect the inside air temperature. On the other hand, when the blower fan motor voltage V2 is low and the air volume of the blower fan 22 is small, the inside air introduction fan motor voltage V1 can be lowered to reduce the air volume of the inside air introduction fan 74. The noise generated by 74 can be reduced.

  For this reason, this vehicle air conditioning control device 2 can reduce the noise of the inside air introduction fan 74 without degrading the performance of the inside air temperature sensor 72.

  Further, the vehicle air conditioning control device 2 sets the inside air introduction fan motor voltage V1 so as to increase as the blower fan motor voltage V2 increases, so that the inside air is not impaired without impairing the comfort of the vehicle interior. The detection accuracy of the temperature sensor 72 can be increased.

  In this embodiment, the internal air introduction fan motor voltage V1 is set to increase as the blower fan motor voltage V2 increases. However, the blower fan motor voltage V2 does not have to be increased. ”, The inside air introduction fan motor voltage V1 is set to“ 0 ”, but it may not be“ 0 ”.

  In the vehicle air conditioning control device 2, the inside air temperature sensor 72, the inside air introduction fan 74, and the inside air introduction fan motor 76 are provided in the inside air introduction passage 88 in the air conditioning controller case 84. By connecting the air outlet 92 to the air conditioning passage 6 on the upstream side of the blower fan 22, the blower fan 22 can be used to suck inside air from the inside air suction port 90 and guide the inside air to the inside air temperature sensor 72. The fan 74 and the inside air introduction fan motor 76 can be omitted.

  Further, the vehicle air conditioning control device 2 reduces the noise generated by the inside air introduction fan 74 by lowering the inside air introduction fan motor voltage V1 when the blower fan motor voltage V2 is low. When V2 drops below the set value, the drive of the inside air introduction fan 74 is stopped, and when the blower fan motor voltage V2 exceeds the set value, the drive of the inside air introduction fan 74 is started, thereby introducing the inside air. Noise generated by the fan 74 can be further reduced.

  The vehicle air-conditioning control device of the present invention can reduce the noise of the inside air introduction fan without degrading the performance of the inside air temperature detecting means, and can be applied to the noise reduction use of industrial equipment including the fan.

It is a flowchart of control which shows the Example of a vehicle air-conditioning control apparatus. It is a figure which shows the relationship between internal air introduction fan motor voltage and blower fan motor voltage. It is a schematic block diagram of the vehicle air-conditioning control apparatus. It is sectional drawing of the controller case for an air conditioning.

Explanation of symbols

2 Air Conditioning Control Device for Vehicle 4 Air Conditioning Duct 6 Air Conditioning Passage 8 Air Cooling Means 10 Air Heating Means 12 Air Feeding Means 22 Blower Fan 24 Blower Fan Motor 66 Control Means 72 Inside Air Temperature Sensor 74 Inside Air Introducing Fan 76 Inside Air Introducing Fan Motor 84 Air Conditioning Controller case 88 Inside air introduction passage 90 Inside air inlet 92 Inside air outlet 94 Voltage setting means

Claims (3)

  An air cooling means for cooling air, an air heating means for heating air, a blower fan for supplying air, an inside air temperature detecting means for detecting the inside air temperature in the passenger compartment, and an inside air introduction fan for guiding the inside air to the inside air temperature detecting means, The inside air is introduced to the inside air temperature detecting means by the inside air introduction fan to detect the inside air temperature, and the air cooling means, the air heating means, and the blower fan are set so that the detected inside air temperature becomes a set temperature. In the vehicle air-conditioning control apparatus for controlling the internal air, the inside air introduction fan motor voltage supplied to the inside air introduction fan motor of the inside air introduction fan is changed according to the blower fan motor voltage supplied to the blower fan motor of the blower fan. A vehicle air-conditioning control device comprising voltage setting means for setting in such a manner.   In the air conditioning controller case of the vehicle air conditioning control device, an inside air introduction passage communicated with the inside of the vehicle interior by an inside air suction port and an inside air outlet at both ends is provided, and the inside air introduction passage is provided on the side of the inside air suction port. The vehicle air conditioning control device according to claim 1, wherein a temperature detecting means is provided, and the inside air introduction fan and the inside air introduction fan motor are provided on the inside air outlet side.   2. The vehicle air conditioning control device according to claim 1, wherein the voltage setting unit sets the inside air introduction fan motor voltage to increase as the blower fan motor voltage increases.

Images