JPS6061328A - Automatic controlling air conditioner - Google Patents

Abstract

PURPOSE:To make a device confromable to a state of anything trouble happening, by separating temperature related elements from a control in time of trouble happening in operation of control in a system, while installing an emergency circuit which actuates at least a part of these elements directly with a power source. CONSTITUTION:Taking notice of anything unusual, when an emergency switch 212 is closed, a coil of a relay 213 is excited and a normally closed contact is opened. Therefore, a heating unit 203, a blower unit 204, a water cock 205 and an air valve 206 are all no longer supplied with power. On the other hand, the normally closed contact is closed as usualy by excitation in the relay 213, and also a relay 211B keeps its exciting state whereby its contact is closed so that a blower motor 208 rotates without passing through a motor control circuit 202. Accordingly, when the switch 212 for emergency switch rotation is made into circuit, it can be set down to a defroster mode performing warm air blowing off from both defroster and floor sides.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automatically controlled air conditioner, and more particularly to an emergency circuit in the event of a control abnormality.

(Prior art) In recent years, arithmetic and control devices such as microcomputers have been used to
Automatically controlled air conditioners have appeared that control the temperature inside the vehicle toward a target value according to the passenger's settings.

This type of air conditioner has many input signals.

Furthermore, there are many objects to be controlled based on this, and the arithmetic control itself is extremely complex.

Therefore, even if a malfunction occurs in part of the control system, it often immediately affects the entire control system.

However, no countermeasures have been taken in the past when such an abnormal situation occurs.

(Objective of the Invention) This invention was made based on the above-mentioned circumstances, and its purpose is to provide an automatically controlled air conditioner that can respond when an abnormal situation occurs in the control system. .

(Structure of the Invention) In order to achieve this object, according to the present invention, a detection means for detecting a temperature-related physical environmental factor and outputting it as an electric signal, and a temperature-related physical environmental factor in the vehicle interior are set. A setting means for transmitting an electric signal according to a setting operation by an occupant, a drive device for driving an operating element related to temperature, and an optimum environment for creating an optimal environment in the vehicle interior based on the output signals of the detection means and the setting means. In the automatic control air conditioner, the automatic control air conditioner is equipped with an arithmetic and control device that performs arithmetic calculations based on the calculation results and sends a command signal to the drive device based on the calculation results, when an abnormality occurs in the calculation or control of the arithmetic and control device. An emergency switch circuit is provided so that at least a part of the drive device can be operated directly by the power supply circuit by separating the drive device from the control of the arithmetic and control unit.

(Effects of the Invention) With the above configuration, the present invention can provide an automatic air conditioning control device that has the following effects.

■ By installing an emergency switch, it is possible to take at least a minimal response in the event of an abnormal situation.

By turning on the emergency switch, the heating system unit is set to a predetermined state, for example, the warmest state, and it becomes possible to adjust the warm air by turning on and off the main switch of the air conditioner.

■Also, by being able to blow out warm air.

Safe driving can be ensured by removing fog from a car's windshield.

■ Under the scorching sun, there is no need to worry about running, and air will flow in as long as it runs, so no countermeasures are required unless conditions are bad for all culms. but.

Without a certain amount of warm air during cold weather, the driver's winter will also affect the health of other passengers. For this reason, it is desirable to obtain an effect similar to the previous (scent) term.

(Example of the invention) Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a system diagram showing an embodiment of the present invention.

According to the figure, a system chamber 10° for internal and external air and a drive device 20. A portion 30 including a detection means, a vehicle interior setting means, etc. and an arithmetic and control unit 40.

System chamber 10, outside air introduction duct, 11.

Inside air introduction duct 12. Inside/outside air switching door 13. -Proafan 14. Evaporator 15. Heater core 1B, air mix door 1? A, 17B, 17C, a floor door 18A, a ventilator door 18B, and a defroster door 18C. Depending on the selection of each door 18A to 18C, any two of the footwell outlet A, ventilator outlet B, and defroster outlet C can be used. Execute the selected two-layer blowout control.

The outside air introduction duct 11 is a duct for introducing air outside the vehicle interior, and the internal regulation introduction duct 12 is a duct for reintroducing air inside the vehicle interior. Choose whether to let in air.

The proa fan 14 sends out air introduced from the ducts 11 and 12 toward the interior of the vehicle. An evaporator 15 is disposed immediately after the proafan 14, and generates cold air by introducing refrigerant.

The heater core 16 forms warm air and appropriately mixes it with the cold air from the evaporator 15. A
~L? Adjust the mixing ratio depending on the opening degree of C.

In this way, the switching force +ii+ of the inside/outside air switching door 13, the rotation speed of the proa fan 14, and the air mix 1ζa 17
A~l? The optimum amount of air is sent into the passenger compartment depending on the opening degree of c.

In addition, each element 13.14. ．． 17A-17C, 18A-1
8C is operated by one crew member or automatically, and is referred to as an "operating element" in this specification as necessary.

The drive device 20 includes the aforementioned temperature-related operating elements 13.1.
4.17A This is for driving N17C, 18A to 18C, and includes an inside/outside air switching actuator 21° motor control circuit 22. It is equipped with an opening adjustment actuator 23° and a switching actuator 24. The switching actuator 21 receives the command signal CCt+, so the internal/external air switching door 1
3 in a predetermined switching direction.

The motor control circuit 22 determines the rotation speed of the proa fan 14 based on the command signal Cc2. The opening adjustment actuator 23 determines the opening of the air mix doors 17A-17C based on the command signal CC3. The J switching actuator 24 is determined based on the command signal CC3.

The switching actuator 24 opens and closes the doors 18A to 18C in response to the command signal CC4, and selects any two air outlets as described above.

The portion 30 includes a detection means for detecting temperature-related physical environmental factors and outputting them as electrical signals, and an in-vehicle setting that sends out electrical signals according to setting operations by the occupant to set temperature-related physical environmental factors in the vehicle interior. and other means.

The detection means includes a head room temperature sensor 31 that detects the temperature near the head within the vehicle interior. A foot room room temperature sensor 32 detects the temperature near the foot of the vehicle interior, and a differential air outlet sensor 33 detects the air outlet temperature on the defroster side. Vent side blowout sensor 34 that detects the blowout temperature on the ventilator side. A solar radiation sensor 35 that detects the amount of radiation. Also provided is an outside temperature sensor 3B that detects the temperature of outside air.

As the vehicle interior setting means, a set temperature switch 37 is provided for setting a desired vehicle interior temperature.

Other means are an AD controller and a temperature display. The AD converter 38 converts the signals from each detection means and in-vehicle setting means into digital signals for post-processing.

The temperature display device 38 displays the temperature set by the set temperature switch 37.

Various methods other than segment display using fluorescent tubes, LEDs, liquid crystals, etc. are possible.

Further, each sensor 31 to 3B has a detection signal 5S1-
3S6 is detected, and the set temperature switch 37 receives the set temperature signal CS.
Send out.

In this specification, physical environmental factors related to temperature include not only temperature, but also humidity9, solar radiation, etc., and also include factors that affect the temperature inside the vehicle, such as single speed, as necessary. This includes:

The arithmetic and control device 40 sends out a control command signal cci-CC4 based on the signals SSI-3S6 and C9 from each detection means and setting means, etc., so as to create an optimal environment in the vehicle interior.

Incidentally, the relationship between the power supply circuit of such an air conditioner and the engine mechanical system is as shown in FIG.

According to the figure, an arithmetic and control device 200, which is the same as the above-mentioned arithmetic and control device 40, receives input signals Sl from various sensors (including setting means) 201, and drives a motor, which is a more detailed representation of the drive device 20 of FIG. control circuit 202, heating unit) 203. Proa unit 204, water cock 2
A control command signal 205 is sent out at 04, respectively.

Motor control circuit 202 is similar to circuit 22 in FIG. 1, and controls the rotation speed of proar motor 208.

The heating unit 203 includes a heater core and an actuator for the air mix door. Air mix doors 17A to 17C of this heating unit 203
(FIG. 1) shows, for example, a fully open state when the control signal S3 is removed. The lower unit 204 includes the switching actuator 21, the door 13, the switching actuator 24, and the doors 18A to 18C shown in FIG. This floor unit 205 is in a state where the control signal S4 is no longer present.

For example, it is possible to introduce outside air and blow it out from the floor side A and the defroster side C. Each door like this13.18
The state of A-18C is determined by the mechanical neutral point of the actuator when there is no signal.

The water cock 205 supplies hot water to the heater core 1B to generate warm air. In a state where the control signal S5 is no longer present, the water valve 205 is fully opened, for example.

Air valve 206 opens air valve 206 based on air from the engine system, heating unit) 203. Floor unit 2o4. Air is sent to the water cock 205 to operate each actuator. This air valve 2
06 is open because the power supply circuit 209 is powered on.

In addition, according to the figure, the main switch 210 of the air conditioner.
Relays 211A and 211B operate accordingly.

Also shown are a switch 212 and a relay that constitute the emergency switch circuit.

Next, the operation of this embodiment will be explained.

The state shown in FIG. 2 is a state in which the device can operate normally. Therefore, when main switch 210 is closed, voltage from power supply circuit 208 is applied to relay 211A.

211B contacts are closed. Therefore, the heating unit is connected through the contacts of the relay 211A and the normally closed contacts of the relay 213) 203. Pro unit 204゜Water cock 205. Air valve 206 is energized.

Also, since the relay 211B is energized via the contacts of the relay 211A (from the relay 211B to the arithmetic and control unit 200
), the contacts of relay 211B are closed and blower motor 208 is driven.

At this time, the power supply voltage is supplied from the power supply circuit 209 to the arithmetic and control unit 200 via the contacts of the relay 211A and the coil of the relay 211B, so that the unit 200 operates as expected and the target air conditioning control can be achieved. I'll do it like that.

At this point, crew member 1 noticed an abnormality in the air conditioner and switched on emergency switch 2.
12 is closed.

This energizes the coil of relay 213 and opens its normally closed contacts. For this reason, heating unit) 20
3. Floor unila l-204, 'Footakotoku 205
．． Power is no longer supplied to the air valve 2013, and each door 13.18A-18c becomes as described above, for example.

On the other hand, the normally closed contact is closed by the excitation of the relay 213, and the contact of the relay 211B is also closed because the energized state is maintained by the switch 212, and the blower motor 208 rotates without going through the motor control circuit 202.

Therefore, when the switch 212 of the emergency switch circuit is turned on, the defroster mode can be set in which warm air is blown from the defroster side and the floor side.

Of course, other blowing modes can be achieved by adjusting the neutral point of the actuator when there is no signal and the rotational speed of the blower motor to appropriate conditions.

This invention is not limited to nine or more embodiments, but can include any various modifications within the scope that can achieve the purpose of this invention. For example, in the nine and above embodiments, a two-layer flow type system in which the air mix doors 17A to 17G are provided above and below the heater core 16 has been described, but it goes without saying that a single-layer flow type system having one air mix door may be used.

[Brief explanation of drawings]

Fig. 1 is a system diagram showing an embodiment of this invention, and Fig. 2 is a system diagram showing an embodiment of the present invention.
FIG. 2 is a system diagram showing main parts of the embodiment shown in the figure. 10... System chamber, 20... Drive device, 3
1 to 3B...detection means, 37 setting means, 40, 20
0... Arithmetic control device, 202... Motor control circuit,
208...Power supply circuit. 212, 213...Emergency switch circuit. Patent applicant: Nissan Shatai Co., Ltd. Sub-agent Patent attorney: Hiroshi Fujiwara

Claims (3)

[Claims] (1) Detection means that detects physical environmental factors related to temperature and outputs them as electrical signals, and sends out electrical signals according to the setting operation by the occupant to set physical and physical environmental factors in the vehicle interior related to temperature. a setting means, a drive device for driving an f-operation element in relation to the temperature, and a calculation based on the output signals of the detection means and the setting means to form an optimum environment in the vehicle interior, and based on the calculation result. In an automatic control air conditioner comprising an arithmetic and control device that sends a command signal to the drive device, when an abnormality occurs in the calculation or control of the arithmetic and control device, the drive device is separated from the control of the arithmetic and control device. An automatically controlled air conditioner, characterized in that it is provided with an emergency switch circuit such that at least a part of the drive unit can be actuated directly by the power supply circuit. (2) The automatically controlled air conditioner according to item 1, wherein at least a portion of the drive device is a motor control circuit for a pro-a-fan that sends air into the vehicle interior. (3) In the device according to item 2, the actuator of the air mix door of the heater core that regulates warm air in the drive device is positioned in a predetermined state by turning on a switch of the emergency switch circuit. Automatically controlled air conditioner.