KR900002120Y1 - Timer with thermal - control function - Google Patents

Abstract

No content.

Description

Timer with temperature control

1 is a display showing a keypad of the present invention.

2 is a circuit diagram of the present invention.

Figure 3 is a graph for explaining the temperature and time control of the air conditioner equipped with the present invention.

* Explanation of symbols for main parts of the drawings

TI: Dummyster R TC: Real-time Call Block Unit

MCU: Microcomputer Unit ICI: Monostable Multivibrator

SR: Shift register TB1, TB2: Transistor buffer

The present invention relates to a timer having a temperature control function, and more particularly, to a timer that can be attached to a heating and cooling device to simultaneously control temperature and time.

Conventionally, the air conditioner has been used by attaching a timer that has room temperature control function. However, the conventional timer was able to control only the temperature by setting one point of temperature, such as operating temperature or set temperature. By adopting the analog approach, it was economically costly.

In addition, since only one temperature point is controlled, there is an inconvenience in that the user must modify the room temperature according to the time zone, thereby causing fuel waste.

The present invention compensates for the shortcomings of the above-mentioned conventional devices, and enables time and temperature control to be automatically controlled by digital method, and the control temperature is divided into operating temperature and boundary temperature so that two points of temperature can be set. It is an object of the present invention to provide a more economical and convenient timer that allows the temperature of the two points can be automatically controlled in the time zone desired by the user.

The timer of the present invention consists of a constant voltage source, a variable resistor, a dummyster, a condenser, and a monostable multivibrator to generate the number of pulses increased or decreased in accordance with a change in ambient temperature to achieve the above object. Back up) It is connected to the selection circuit for selecting any one of the power supplies, it is connected to the crystal oscillator for signal oscillation in 0.5sec period, and it has RAM memory element therein, and the material inside A real time clock unit formed of a CMOS semiconductor element to perform a digital clock function and a memory function, a keypad formed of a switch circuit for providing a command button to a user, a current temperature input from the pulse generator and a user's command button The real time clock unit and a function of comparing and comparing the boundary temperature and the operating temperature input by The pulse generator and the keypad are connected to each other to perform the function of comparing the current time from the on time and the on / off time input by the user's command button, and the long time real time clock unit Address data, bus line read / write (R / W) control bus line, microcomputer unit connected via interrupt line and reset line, divided into seven sections to provide the user with confirmation of execution of the keypad An indicator formed of a diode and configured to display status by a combination of a selection pulse transmitted via a line from the microcomputer unit and a driving pulse delivered through the line from the microcomputer unit, the indicator being generated from the microcomputer unit Shift registers and phases for generating the indicator drive pulses sequentially And a transistor buffer for amplifying the select pulse generated from the conventional microcomputer unit and the shift register sequential pulse, respectively.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a display diagram illustrating a gizmo pad 3 of the present invention, FIG. 2 is a circuit diagram of the present invention, and FIG. 3 is a graph for explaining time and temperature control of a heating and cooling device to which the present invention is attached.

Figure 1 shows a command button of the present invention, the characteristic part of which is equipped with operating temperature, boundary temperature, on / off time setting and clock function button.

In FIG. 2, the pulse generator 2 includes a variable resistor RI, a dummyster T, a condenser C, and a monostable multivibrator IC. Generate.

Here, the dummy skirt (TI) has a negative coefficient and forms a periodic signal by combining with the variable resistor (RI) and the capacitor (C) by using the characteristic that the resistance value changes in inverse proportion to the change in temperature. The periodic signal is converted into a pulse signal by the monostable multivibrator, and this pulsed pulse signal is sent to the microcomputer unit (MCU).

The Real Time Clock Unit (RTC) has a RAM memory device inside it, which is connected to a crystal oscillator (OS) to perform a clock function, and shuts down and backs up the constant voltage source (1) during a power failure. Up) is connected to the selection circuit SC for continuously receiving the voltage by the power supply.

The crystal oscillator (OS) oscillates a 4.1943 MHz frequency signal and the real time clock unit (RTC) divides the oscillated signal to form a time pulse of 0.5 sec, which is then sent to the microcomputer unit (MCU). At the same time, a 0.5 sec time pulse is counted within itself to form a digital clock, which is supplied to the microcomputer unit (MCU) via the bus line L2.

The internal memory device (RAM) of the real-time clock unit (RTC) has a capacity to store the current time, operating temperature, boundary temperature, and on / off time, and the stored contents are stored in the MCU through the bus line L2. You will send and receive from.

In addition, the real-time clock unit (RTC) is a CMOS semiconductor chip that allows the power to be used for a long time based on the low power consumption.

The microcomputer unit (MCU) reads the contents of the internal memory (RAM) of the real time clock unit (RTC) or reads the contents of the user's command button from the key pad.

If one of the command buttons of the keypad 6 is pressed, the input line L9 of the MCU goes low (L), which is processed according to the command stored in the ROM of the MCU. In the case of the operating temperature and the boundary temperature, the indicator 4 is driven through the address data bus line L2 and the transistor buffer TBI and stored in the corresponding memory address of the real time clock unit RTC.

The MCU is also connected to the shaft register (SR), to generate a sequential pulse for driving the indicator (4), which is amplified through the transistor buffer (TB2) to drive the indicator (4). do.

The microcomputer unit (MCU) always counts pulses that are inversely proportional to the room temperature from the pulse generator 2 and converts them into current temperature values. The converted values are converted into lines L6, transistor buffers TB1, and lines L7. L8 and the transistor buffer TB2 are used to drive the indicator 4 and to store it in the internal RAM of the microcomputer unit MCU in the illustration.

The microcomputer unit (MCU) operates as follows according to the stored present temperature value and present time and operating temperature, boundary temperature, and on / off time stored in the real time clock unit (RTC).

The microcomputer unit (MCU) is controlled by the read / write control bus line L3 whenever a 0.5 sec cycle pulse signal is input from the real time clock unit (RTC) through the interrupt terminal Int and the line L4. The current time on / off time, boundary temperature and operating temperature are read from the real time clock unit (RTC), and the current time is displayed on the indicator and the time is stored in the on / off time zone stored in the real time clock unit (RTC). Compare the presence.

If the compared value is in the on / off time zone, the operating temperature is read from the real time clock unit (RTC) in the on time zone and the boundary temperature is read in the off time zone.

The stored temperature is compared with the present temperature, and if the operating temperature is greater than the present temperature, the microcomputer unit MCU sends a high signal through the output line L5 to drive the heating / cooling device.

On the contrary, when the operating temperature is lower than the present temperature, the low (L) signal is sent out through the output line (L5) so as not to operate the heating and cooling equipment.

The boundary temperature at the off time zone is also implemented by the above principle.

The operating state of the FIG. 2 circuit can be clearly seen by referring to the graph of FIG.

As shown in Figure 3, if the user sets the on-time zone from 1 o'clock to 2 o'clock, the operating temperature is set to 20 ° C, the off-time zone is after 2 o'clock, and the boundary temperature is 15 ° C. The operation of the air conditioner with the timer is as shown in the graph.

As described above, the present invention is a timer having a digital temperature control function, and when the user sets the on / off time zone and the operating / boundary temperature value in advance, the timer automatically controls the time and temperature, which is more convenient. Economic effect. I

Claims (1)

A pulse generator (2) for generating a pulse portion increased or decreased in accordance with the ambient temperature change, a real time clock device (RTC) including a digital time pulse generation means for checking the current time and a reservation time memory means, and a command button to the user It is connected to a keypad (3) configured as a switch circuit, the pulse generator (2) and the real time clock device (RTC) for providing, the current temperature input from the pulse generator (2) and the user's command A first comparison means for comparing the operating temperature and the boundary temperature inputted by the button with each other, and a second comparison comparing the current time from the real-time clock device (RTC) with the reservation time reserved by the user's command button. Means and control means for controlling the air conditioning equipment to operate at a set operating temperature during the reservation time zone, and to operate the set boundary temperature air conditioning equipment outside the reservation time. And a digital display means for providing a user with confirmation of execution of the keypad 3 in succession to the microcomputer unit (MCU), the real time clock device (RTC) and the microcomputer unit (MCU). The timer, characterized in that to automatically adjust the operating temperature, boundary temperature and time.