JPS6013687Y2 - Automotive air conditioner - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to an improvement in an air conditioner for an automobile, particularly an air conditioner that fully automates air conditioning and heating in a vehicle (hereinafter simply referred to as an auto air conditioner).

(Technical background) Some recent automobiles are fully automated in order to ensure safe driving, and do not require manual heating and cooling of the interior of the vehicle.

However, this automation uses sensors to detect the temperature inside and outside the car, and then opens and closes various doors installed in the air conditioner (e.g. intake door, air mix door, defrost door, etc.) based on the detected temperature information. This is done by doing it automatically.

Therefore, although the temperature inside the vehicle is appropriately controlled, the humidity is left unchecked.

For this reason, even though the automatic air conditioner is activated and the temperature of the air inside the vehicle is controlled, the humidity is not controlled, so the windshield fogs up and the user has to manually switch from auto mode to differential mode. There may be no.

This cannot be said to be a completely automatic air conditioner, and switching modes while driving is dangerous because it diverts attention from driving.

(Purpose of the invention) The present invention was made in view of the above-mentioned defects.A humidity sensor is installed in the vehicle interior to detect the humidity in the vehicle interior, and the humidity sensor detects when the humidity in the vehicle interior has exceeded a predetermined humidity. If there is a warning signal, this is given top priority and even if the auto mode automatically air-conditions the interior of the vehicle, the auto mode switches to the defrost mode to immediately remove fog from the windshield. The purpose is to provide automatic air conditioning equipment.

(Structure of the invention) The automatic air conditioner for automobiles of the invention senses the temperature inside the vehicle with a sensor, inputs the signal from the sensor to an amplifier, and operates various door operating devices based on the output signal from the amplifier. In an automatic air conditioner for a car, which is activated to control the opening degree of various doors and to control the temperature inside the vehicle interior to a predetermined temperature, the humidity inside the vehicle interior is detected at an appropriate location in the vehicle interior, and the humidity is measured. A humidity sensor is provided that inputs the signal to the amplifier, and this humidity sensor is connected to the amplifier. When this humidity sensor detects a predetermined humidity, that is, the humidity immediately before the windshield fogs up, it receives a signal of this predetermined humidity. The adjustment mechanism outputs a signal instructing to open the defrost door when a predetermined humidity signal is input to the amplifier and added to this amplifier, and the amplifier outputs a signal instructing to open the defrost door. This output signal activates the actuator that opens the defrost door, and as soon as the inside of the vehicle reaches the specified humidity,
The feature is that the defrost door is opened preferentially regardless of the opening degree of the various doors, so that the driver does not have to worry about the fogging of the windshield at any time and under any circumstances. This is an automatic air conditioner for automobiles that allows safe and comfortable driving.

(Example) Hereinafter, an automatic air conditioner for an automobile according to the present invention will be described in detail based on an example shown in the drawings.

FIG. 1 is an explanatory diagram showing the outline of the air conditioner, and shows the relationship between the auto air conditioner body 1 and the negative pressure/electrical system.

An automatic air conditioner generally rotates various doors within the air conditioner appropriately based on a signal from a temperature sensor to blow desirable conditioned air into the vehicle interior.

The various doors are rotated by an actuator powered by negative pressure via a link mechanism or the like.

This main body 1 consists of an intake unit 2, a cooler unit 3, and a heater unit 5, which are interconnected.

The intake unit 2 has an outside air intake 6 and an inside air circulation lower, which are selectively opened and closed by an actuator 8 operated under negative pressure by rotation of an intake door 9 connected via a link. .

Therefore, when the fan device 10 rotates, air flows into the intake unit 2 from the opening on the side selected by the intake door 9.

A cooler unit 3 is installed at the outlet of this intake unit 2.
is connected.

This cooler unit 3 is composed of a casing 11 and an evaporator 12 installed inside the casing 11, and exchanges heat between the refrigerant flowing in a refrigerant conduit 13 communicating with the evaporator 12 and the air sent from the fan device 10, thereby generating cool air. is led to the next heater unit 5 through the outlet 14.

This heater unit 5 guides engine cooling water to the heater core 4 and heats the cold air.

At the front of this heater core 4, there is an air mix door 16.
is provided, and the air mix state between the amount of heated air and the amount of cold air is changed by adjusting the opening degree of the mix door 16.

The air mix door 16 is opened and closed by a power servo 17 that generates a negative pressure.

Therefore, since this power servo 17 adjusts the temperature of the air blown into the vehicle interior by its displacement operation amount,
This is extremely important for vehicle interior air conditioning.

Various types of ducts are provided downstream of the heater core 4, and these ducts are provided with various doors to separate cold air and the like.

That is, as shown in FIG. 2, these various ducts include a defrost duct 18 that blows air toward the windshield, a floor duct 19 that blows air toward the feet, and a vent duct 20 that blows air toward the occupant's chest.

Each of these ducts is provided with a defrost door 18a, a floor door 19a, and a vent door 20a, respectively.
Each door is operated collectively by an actuating device A consisting of a link mechanism 22 and a shift actuator 21 that operates the link mechanism.

This collective operation is not directly related to the present invention and will not be described in detail, but the main link 23 constituting the link mechanism 22 connected to the shift actuator 21 is
The main link 23 and three sub-links 24, 25, 26 connected to the main link 23 allow each door to have a predetermined opening degree.

On the other hand, the negative pressure electrical system shown in FIG. 1 includes a transducer 27 that selectively guides the negative pressure that operates the power servo 17.

This transducer 27 has an excitation coil 29 connected to an amplifier 28 that concentrates various conditions and outputs various control signals based on the conditions, and an actuation rod 30 that is inserted through the excitation coil 29.

This actuating rod 30 selectively communicates with a negative pressure source 33 or with the atmosphere through on-off valves 31 and 32 provided at its tip.

Here, the inside and outside air temperature of the car sensed by the inside air sensor 34 and the outside air sensor 35 is added to the amplifier 28 as an input signal.

This input signal is compared with a predetermined value set in advance by a comparison circuit (not shown), and is output as a signal for operating the transducer 27.

The operational displacement value of the power servo 17 operated by the transducer 27 is detected by the potentiometer register 36 and output as a position detection signal.

This position detection signal is input to the amplifier 28 and compared with a preset value in a comparator circuit.

In addition, 37 in the figure is a balance control potentiometer, and its resistance value is changed by a balance lever (not shown) which is located inside the car and is operated by the operator.
The speed of the fan device 10 is controlled.

In particular, in the present invention, the inside and outside air sensor 34.35
In addition, a humidity sensor 38 is provided in the vehicle interior, and a signal from this humidity sensor 38 is also applied to the amplifier 28 as an input signal.

It is desirable that this humidity sensor 3B is provided close to the windshield, for example.

Further, the amplifier 28 is provided with an adjustment mechanism that outputs a signal instructing to open the defrost door when the humidity sensor 38 detects a predetermined humidity and receives a signal of the predetermined humidity. ing.

Furthermore, as an embodiment of the present invention, the link mechanism 2
The present invention has an actuating device A such as a defrost door 18a using the second defrost door 18a, and a separate actuating device B for the defrost door 18a, which is different from the actuating device A.

This actuating device B operates the defrost door 18 when a signal instructing to open the defrost door is output from the aforementioned amplifier.
The actuating rod 4 is an actuating device that releases the defrost door 18a, and is connected to an actuator 43, which will be described later, such as the defrost door 18a, and transmits the operation of the actuator 43 to the defrost door 18a.
5, the actuator 43 operated by the negative pressure from the negative pressure source 33 to open and close the defrost door 18a, and provided between the actuator 43 and the negative pressure source 33,
A transducer 39 conducts negative pressure to the actuator 43 in response to a signal from the humidity sensor 38.

This transducer 39 is equipped with an excitation coil 40 and an on-off valve 41, and opens and closes the on-off valve 41 in response to a signal from the autoamplifier 28, thereby conducting negative pressure to the actuator 43. ing.

This operating device operates as follows.

When a signal is input from the humidity sensor 38 to the amplifier 28 indicating that the humidity inside the vehicle has exceeded the predetermined humidity, that is, the humidity immediately before fogging occurs on the windshield.
In response to this signal, the amplifier outputs a signal instructing the opening of the defrost door, and immediately the transducer 39
The excitation coil 40 is energized, and the valve stem 42 having the open valve 41 at its end is moved to the right.

Accordingly, the negative pressure source 33 and the negative pressure chamber 4 of the actuator 43
4 will be in communication, and the defrost door 18a, which is in communication with the operating rod 45 of this actuator 43, will be opened.

However, in this case, the defrost door 18a may be set to a predetermined mode other than defrost, such as heat or pie level, by the shift actuator 21 as described above.

Even in such a case, if there is a signal from the humidity sensor 38, it is necessary to give top priority to the defrost circuit.

Therefore, the actuating device A operates the defrost door by the shift actuator 21 via the link mechanism 22.
In order to immediately shut off the signal from the humidity sensor 38, the shift actuator 21 shown in FIG.
A vacuum selector 47 equipped with an electromagnetic valve 46 for selecting the operation of the shift actuator 21 is provided with an OFF mechanism that cuts off all circuits of the shift actuator 21.

If there is a signal from the humidity sensor 38, the transducer 39 of the separate actuating device B and the OFF mechanism of the vacuum selector 47 are simultaneously activated to open the defrost circuit, and the shift actuator 21 All circuits are cut off.

As a result, the link mechanism 22 becomes free, and the actuator 43 opens the defrost door.

With this configuration, no matter what state the various doors in the auto air conditioner body 1 are in, if a predetermined signal from the humidity sensor 38 is input to the amplifier 28, the defrost door will open and the windshield will become foggy. It will be removed.

In the above embodiment, all the negative pressure circuits of the shift actuator 21 are cut off and the separate actuating device B is operated, but the present invention is not limited to this. It is also possible to eliminate the actuating device B and use the aforementioned actuating device A, which actuates all the doors at once, as the actuating device for actuating the defrost door.

In a conventional automatic air conditioner, when the driver wants to enter the defrost mode, he or she presses the defrost button installed on the control panel when the driver feels it necessary, and the vacuum selector 47 is activated by the solenoid valve 46 mentioned above, and the shift actuator 21 is activated. Operate the defrost door so that negative pressure is conducted to the negative pressure circuit in the differential mode, and open the defrost door.
I am trying to make the default mode appear.

To automatically open the defrost door using this actuating device A, a solenoid valve 46 is further incorporated into the circuit connecting the humidity sensor 38 and the amplifier, and if there is a signal from the sensor 38, the [ The defrost door can be opened by operating the vacuum selector 47 using the magnetic valve 46 in the same manner as described above.

(Effects of the invention) As is clear from the above explanation, according to the invention, a humidity sensor circuit is connected to an amplifier used in an automatic air conditioner, and the signal from this humidity sensor is given top priority. Since the defrost door opens immediately regardless of the mode it is in, the windshield is always clear and the driver is safe and does not have to worry about the windshield fogging up at any time. This has an extremely excellent effect of allowing comfortable driving.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of an automatic air conditioner for an automobile according to the present invention, and FIG. 2 is a schematic explanatory diagram of the main part of FIG. 1 viewed from the side. 18... Defrost duct, 18a...
・Defrost door, 21...Shift actuator, 22...Link mechanism, 28...
Amplifier, 33...Negative pressure source, 34...Inside air sensor 35...Outside air sensor, 3B...
... Humidity sensor, 39 ... Transducer, 43 ... Actuator, 46 ...
··solenoid valve.

Claims (1)

[Claim for Utility Model Registration] The temperature inside the vehicle is sensed by a sensor, the signal from the sensor is input to an amplifier, and the operating devices for various doors are operated based on the output signal from the amplifier to open the various doors. An automatic air conditioner for a car that controls the interior of the vehicle to a predetermined temperature includes: (a) a humidity sensor that detects the temperature in the vehicle interior and inputs the humidity as a signal to an amplifier; and (b) the humidity sensor. an amplifier equipped with an adjustment mechanism that detects a predetermined humidity and outputs a signal instructing to open the defrost door when a signal of the predetermined humidity is input; An automatic vehicle for an automobile, characterized in that the defrost door is opened preferentially, regardless of the opening degree of the various doors, as soon as the interior of the vehicle reaches a predetermined humidity. Air conditioner.