KR920007975Y1 - Heating system of vehicle - Google Patents

Abstract

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Description

Open door alarm circuit of vehicle heating system

1 is a block diagram of the present invention.

2 is a detailed circuit diagram of the present invention.

3 is a waveform diagram showing a drive output of a microprocessor.

* Explanation of symbols for main parts of the drawings

m-pro: Microprocessor A: Acc detector

D: Door detection part B: Buzzer driving part

Q1-Q5: transistor R1-R10: resistor

BZ: Buzzer D / SW: Door Switch

The present invention relates to a control device applied to a heating system (Heating System) for vehicles, in particular, in parallel with the heating device installed in the existing vehicle or to control the heating device in the control device made to perform the unique heating function In order to increase the heating efficiency when operating the heating system for the heating system and to detect the opening of the door of the vehicle according to the user's intention to drive the alarm means to alert the user with an audible sound. The present invention relates to an open door alarm circuit of a system.

In accordance with the rapidly increasing demand of vehicles, vehicles are used not only as a means of transportation but also for leisure, and thus their uses are diversified and additional devices are increasing.

In addition, the application of a separate heating system is useful for long-distance land vehicle.

In this respect, the heating system for single heating has been widespread, but the conventional heating system has no warning means for opening the door of the vehicle.

Of course, it is well known that vehicle safety devices allow warnings through lamps or buzzers on the instrument panel when the door is not open or fully closed.

However, the object and the technical configuration of the present invention to be solved is different.

The present invention warns that the door is opened while the heating system is running while the engine of the vehicle is not started, so that the door is opened for long time parking and the driver getting off the vehicle is alerted to turn off the heating system or the engine is turned off. The purpose of this is to prevent the loss of heating energy due to the door being opened or not completely closed when the room heating is performed by the heating system while the vehicle is not turned off and operated.

Hereinafter, with reference to the accompanying drawings looks at the configuration of the present invention.

Like the program control by the micro (processor) (m-pro) described in detail in the present invention of the applicant's patent application (89-12887), the present invention is basically a micro that performs memory, information processing, arithmetic logic, etc. The sensor output of the Acc detection unit A and the door detection unit D is compared to the processor m-pro by the microprocessor m-pro to drive the buzzer driving unit B. It is configured to be.

In more detail, to detect the input at the Acc position present in the key / box of the vehicle, the Acc detection unit A grounds the transistor Q1 to emitter ground and connects the Vcc to the collector. It is composed of resistors (R1, R2, R3) to be input to m-pro, and the door detection unit (D) is a normal open (NO) contact of the door switch (D / SW) and a reverse polarity Darlington. The bias power supply VBE is coupled between the base of the one-side transistor Q2 connected to the resistor R4-R7 and the transistor Q3, and the emitter power supply VCE of the transistor Q3 is turned into a collector output. Input is connected to the processor (m-pro) and control is executed according to these two detection elements so that the buzzer drive output of the microprocessor (m-pro) is connected through the buzzer drive circuit (B) connected to the reverse polarity Darlington. It is made by connecting for driving.

Let's look at the effects and effects on the present invention made as described above.

Already through the previous application, the operation of the heating system can be seen that the operation by reservation even if the key of the vehicle is missing. However, in the present invention, the buzzer driving according to the detection of both the key and the door can be selectively performed.

In the state of starting, the Acc input is biased to the base of the transistor Q1 through the resistor R2 of the Acc sensing unit A, so that the transistor Q1 is turned on and Vcc flows to the ground side. The "L" level is input to the microprocessor m-pro. Of course, the microprocessor (m-pro) detects the "L" input as the start state.

The door sensing unit D flows the bias power supply VBE of the one-side transistor Q2 connected to the reverse polarity Darlington to the ground side when the door is completely closed, thus turning the transistors Q2 and Q3 into the microprocessor. The "L" level potential is also input to (m-pro).

On the other hand, the control operation of the microprocessor (m-pro) means that the heating system is operating, and the input of the Acc detector (A) indicates that the key is turned off, that is, the "L" level input (the microprocessor (m-pro) ) Input is performed in the initial state of open door detection.

Therefore, the door is closed and compared to detect whether the door (BZ) drive unit B outputs the output of the "L" level in the case of affirmative.

As shown in FIG. 3, when there is an Acc input (“H” level) among the sensing units A and D, the detection of the open door is not performed. On the other hand, when the door is opened when the Acc input, it can be seen that the door detection unit (D) input to the microprocessor (m-pro) is displaced to the "H" level.

At this time, if the heating system is running, the output of the microprocessor (m-pro) changes state and is output as "H". Thus, the transistors Q4 and Q5 of the reverse polarity Darlington circuit are turned on and thereby the buzzer BZ. Power is applied to cause driving.

On the other hand, the buzzer BZ driving output of the microprocessor m-pro is intermittently generated, so that the buzzer BZ is also driven by intermittent (---).

As a result, the user has an effect of deciding whether to turn off the heating system and get off or to maintain the operation of the heating system as it is if the vehicle is temporarily stopped (parking).

The present invention prevents the loss of heating calories and at the same time prevents unnecessary fuel consumption and excessive battery discharge due to carelessness of the user when parking for a long time, and has various effects such as having a method effect depending on the application thereof. It is a very informative design.

Claims (1)

In forming a control device for a vehicle system, an Acc detector A consisting of transistors Q ₁ and resistors R ₁ -R ₃ is connected to a microprocessor m-pro and connected to the collector output Vcc. Acc power is connected to the base of transistor Q ₁ through resistor R ₂ and the door sensing unit D having reverse polarity Darlington connected transistors Q ₂ and Q ₃ and resistors R ₄ -R ₇ . Connect the NO contact of the door switch (D / SW) to the bias power supply (VBE) of the circuit between ground and the emitter power supply (Vcc) of the transistor (Q ₃ ) to the microprocessor (m-pro) as the collector output. It is made by connecting the buzzer driver B made of reverse polarity Darlington transistors Q ₄ and Q ₅ and resistors R ₈ -R ₁₀ to the comparative detection output terminal of the microprocessor (m-pro) to be intermittently driven. Open door alarm circuit of a vehicle heating system characterized in that.