JPH0517289Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention generally relates to an air conditioner for an automobile;
In particular, the present invention relates to an air conditioner for an automobile equipped with a vehicle speed recognition device.

[Conventional technology]

As a conventional air conditioner for automobiles,
55-4794, so it will be explained based on a simplified example of FIG. 2.
The automobile air conditioner shown in FIG. 2 detects the outside air temperature value A output from the temperature sensor 101 installed in front of the engine of the vehicle, the temperature value B detected inside the vehicle, and the air mixture door detection. Based on the air blowing temperature value calculated by the calculation unit 108 from various detected values such as the opening value C, the calculation unit 108 supplies various control command signals to the output control unit 111, and as a result, The output control unit 111 outputs various drive command signals to each of the air mix door, compressor, and fan motor (all not shown), and changes the opening angle of the air mix door and controls the compressor and fan motor.
It controls the temperature inside the vehicle to match the set value by controlling the temperature on and off. By the way, the above-mentioned temperature sensor 101 is normally arranged on the back side of the bumper in front of the vehicle, so it is not affected by the blowback of engine heat caused by so-called slow driving when the vehicle is stopped or in traffic jams, or by the impact of the vehicle in front. When the influence of exhaust gas etc. discharged from the air conditioner is significant, it becomes difficult for the temperature sensor 101 to accurately detect the outside air temperature, resulting in the problem that normal temperature confirmation is not performed and highly accurate air conditioning control is not possible. It was hot.

【the purpose】

Therefore, the present invention is intended to improve the above-mentioned problems of the conventional technology, and its purpose is to prevent the temperature sensor from detecting the normal outside temperature due to the effects of engine heat blowback and exhaust gas emitted from other vehicles. An object of the present invention is to provide an air conditioner for an automobile that can control air conditioning with high precision even when detection cannot be performed.

【composition】

A feature of the present invention for achieving the above object is that a temperature sensor 1 is watertightly installed in the front part of the engine of a vehicle, and air conditioning in the vehicle interior is controlled based on outside air temperature information from the temperature sensor. An air conditioner for an automobile is provided with a vehicle speed sensor 2 for detecting whether the vehicle speed has fallen below a predetermined value, and a memory 3 for appropriately storing outside air temperature information from the temperature sensor 1. Sometimes, the air conditioning inside the vehicle is performed based on the outside air temperature information obtained directly from the temperature sensor 1, and when the vehicle speed falls below a predetermined value, the outside air temperature stored in the memory 3 immediately before the vehicle speed falls below the predetermined value is used. Based on the information
This is an air conditioner for an automobile that outputs drive command signals to the air mix door, compressor, and fan motor to control air conditioning in the vehicle interior.

[Effect]

In the above configuration, when the vehicle speed detected by the vehicle speed sensor 2 is equal to or higher than a predetermined value, the air conditioning in the vehicle interior is controlled based on the outside air temperature information directly obtained from the temperature sensor 1, and the vehicle speed sensor 2 When the vehicle speed detected by the vehicle speed becomes less than a predetermined value, the air conditioning inside the vehicle is controlled based on the outside air temperature information stored in the memory 3 immediately before the vehicle speed became less than the predetermined value. be.

【Example】

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram of an air conditioner for an automobile according to an embodiment of the present invention. In FIG. 1, reference number 1 is a temperature sensor;
As described above, the temperature sensor 1 is disposed on the back side of the bumper in front of the engine compartment, and detects and outputs the outside air temperature. Vehicle speed sensor 2 converts the detected vehicle speed into an electrical signal and outputs it. The temperature sensor 6 is designed to detect and output the temperature inside the vehicle. A potential balance register (hereinafter referred to as "PBR") section 7 detects the opening degree of an air mix door (not shown) and outputs this. The switch input section 9 includes a plurality of switch groups for setting a target temperature when controlling the temperature of the air inside the vehicle by the air conditioner. The display section 10 is configured to display, for example, the target temperature set at the switch input section 9 digitally. The output control section 11 is configured to output a drive command signal to the air mix door, compressor, and fan motor (none of which are shown) based on the air blowing temperature value calculated by the calculation section 8 as described above. . The vehicle speed recognition/judgment section 4 has its input side connected to the aforementioned vehicle speed sensor 2, and its output side connected to the outside air temperature data switching section 5, respectively. When the vehicle speed recognition/determination section 4 determines that the vehicle speed value detected by the vehicle speed sensor 2 is in a region larger than the vehicle speed reference value corresponding to slow driving, the vehicle speed recognition/determination section 4 sends a message to the outside air temperature data switching section 5. A predetermined signal representing "vehicle speed detection value>vehicle speed reference value" is output, and it is determined that the vehicle speed value detected by the vehicle speed sensor 2 is in a region smaller than the vehicle speed reference value corresponding to the sluggish driving. Sometimes, it is configured to output a predetermined signal to the outside air temperature data switching section 5 representing "vehicle speed detection value<vehicle speed reference value". The outside air temperature data switching section 5 has its input side connected to the aforementioned temperature sensor 1, the vehicle speed recognition/judgment section 4, and the output side of the outside air temperature data storage memory 3, respectively, and its output side is connected to the calculation section 8. and the input side of the outside air temperature data storage memory 3, respectively. The outside air temperature data switching section 5 switches the outside air temperature data sequentially provided from the temperature sensor 1 when the vehicle speed value detected and output from the vehicle speed recognition/judgment section 4 indicates that it is in a region larger than the above-mentioned vehicle speed reference value. The temperature value data is supplied as is to the calculation unit 8. Further, the outside air temperature value data is stored in the outside air temperature data storage memory 3. Next, when a signal indicating that the detected value has become smaller than the reference value is output from the vehicle speed recognition/judgment section 4, the input from the temperature sensor 1 is blocked, and the input is stopped immediately before the blocked time. This data is read out from the outside air temperature data storage memory 3 and output to the calculation section 8. The calculation section 8 reads the target temperature value outputted from the switch input section 9, outputs a display command signal to display it digitally on the display section 10, and stores the target temperature value in an internal memory. The calculation unit 8 successively takes in the detection value data C, B output from the PBR unit 7 and the temperature sensor 6, and the outside air temperature data A′ given via the outside air temperature data switching unit 5, and adjusts the vehicle interior temperature to the target. The output control unit calculates the air blowing temperature value to match the temperature, and uses the calculation result to drive and control various control command signals for controlling the opening angle of the air mix door and driving the compressor and fan motor ON and OFF. Give to 11. The operation of the above configuration will be explained below. While the vehicle speed recognition/judgment unit 4 compares the vehicle speed detection value sequentially output from the vehicle speed sensor 1 with a preset vehicle speed reference value and determines that the detected value is larger than the reference value, A predetermined signal representing "vehicle speed detection value>vehicle speed reference value" is output from the vehicle speed recognition/judgment section 4 to the outside air temperature data switching section 5. While this signal is being applied, the outside air temperature data switching unit 5 continues to send out the outside air temperature data sequentially outputted from the temperature sensor 1 to the calculation unit 8 and the outside air temperature data storage memory 3 as they are. As a result, the calculation unit 8 performs the same calculation as the calculation unit 108 shown in FIG. 2, and outputs the calculation result to the output control unit 111. In other words, this means that if the detected vehicle speed value is greater than the vehicle speed reference value corresponding to the vehicle speed, it indicates that the vehicle is in a smooth running state. This is because the influence of engine heat blowback or exhaust gas emitted from other vehicles can be ignored. On the other hand, when the vehicle speed recognition/determination section 4 recognizes that "vehicle speed detection value < vehicle speed reference value" as a result of the comparison, the outside air temperature data switching section 5
A predetermined signal representing "vehicle speed detection value<vehicle speed reference value" is output. Outside air temperature data switching section 5
When this signal is given, it blocks the input of the outside air temperature data that had been successively output from the temperature sensor 1, and also prevents the input of the outside air temperature data that has been inputted from the temperature sensor 1 immediately before the signal is inputted to the outside air temperature data switching section 5. The stored data is read out from the outside air temperature data storage memory 3 and output to the calculation unit 8. As a result, the calculation unit 8 performs the same calculation as the calculation “vehicle speed detection value>vehicle speed reference value” and outputs the calculation result to the output control unit 11. In other words, a state in which the detected vehicle speed value is smaller than the vehicle speed reference value indicates that the own vehicle is stopped or stuck in a traffic jam and is in a state of so-called slow driving, and the temperature sensor 1 outputs this state. Engine heat blowback against outside temperature data,
Alternatively, it is possible to solve the conventional problem that air conditioning control based on the data results in inaccurate control because the influence of exhaust gas emitted from other vehicles is extremely large.

【effect】

As explained above, according to the present invention, even when the temperature sensor cannot normally detect the outside temperature due to the influence of engine heat blowback or the influence of exhaust gas emitted from other vehicles, it is possible to achieve high accuracy. Accordingly, it is possible to provide an air conditioner for an automobile that is capable of controlling air conditioning.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an air conditioner for an automobile according to an embodiment of the present invention, and FIG. 2 is a block diagram of an air conditioner for an automobile according to the prior art. 1...Temperature sensor (for outside air), 2...Vehicle speed sensor, 3...Memory for storing outside air temperature data, 4...
Vehicle speed recognition judgment unit, 5...Outside temperature data switching unit,
6...Temperature sensor (inside the vehicle), 7...PBR section, 8
. . . Arithmetic section, 9 . . . Switch input section, 10 . . . Display section, 11 . . . Output control section.

Claims (1)

[Scope of utility model registration request] In an air conditioner for an automobile, a temperature sensor 1 is watertightly installed in the front part of the engine of a vehicle, and air conditioning in the vehicle interior is controlled based on outside temperature information from the temperature sensor. A vehicle speed sensor 2 for detecting whether or not the vehicle has become accustomed to the temperature, and a memory 3 for appropriately storing outside temperature information from the temperature sensor 1 are provided. 1, and when the vehicle speed sensor 2 detects a vehicle speed below a predetermined value, the information is stored in the memory 3 immediately before the vehicle speed becomes below a predetermined value. What is claimed is: 1. An air conditioner for an automobile, which outputs a drive command signal to an air mixer door, a compressor, and a fan motor based on outside air temperature information to control air conditioning in a vehicle interior.