KR920010162B1 - Boiler temperature controller - Google Patents

Abstract

The temp. control device comprises a function selector (27) for selecting sleeping, outing, and hot water supplying function, a transmitter (2) made of a signal converter (26) for generating rectangular pulse signal according to the function selecting switches (21)(22)(23) of the selector, and a controller (12). The controller performs the sleeping temp. control function in accordance with the transmitter, and the outing temp. control function to raise the room temp. in short time. The signal from the signal converter is inputted to a micro computer (17) in the controller through a signal discriminator (12) to perform the sleeping and outing function control.

Description

Boiler Temperature Control

1 is a schematic diagram of the present invention.

(a) is a state where the boiler and transmitter are isolated.

(b) The transmitter is installed in the boiler.

2 is a temperature retention characteristic curve at bedtime in the present invention,

(a) is when the weather time is specified in advance.

(b) does not specify a wake up time in advance.

When using a general IC circuit instead of the microcomputer (c).

3 is an operating characteristic diagram of each part in the optimum temperature control when going out in the present invention.

Figure 4 shows an example of a method of transmitting a signal from the transmitter to the controller in the present invention,

(a) A method using five signal transmission lines.

(b) is a method using two signal transmission lines.

FIG. 5 is a circuit diagram showing an exemplary circuit of the two-wire transmission system of (b) in FIG.

FIG. 6 is an embodiment showing signal waveforms in the two-wire transmission method of FIG.

(a) is the output voltage pulse waveform diagram of the waveform shaping circuit generated in the transmitter.

(b) is a pulse voltage waveform appearing across the resistor (R ₈₎ of the signal discriminator.

(c) shows output voltage spread waveform of waveform shaping circuit of signal discriminator.

* Explanation of symbols for the main parts of the drawings

1: boiler 2: transmitter

3: signal transmission line 11: boiler body

12 controller 16 signal discriminator

17: microcomputer (microcom) 21: sleep function selector switch

22: Out function selection switch 23: Hot water function selection switch

24: temperature control switch 25: common terminal

26: signal converter 27: function selector

28: magnification control unit IC ₁ : integrated circuit for timer

IC ₂ : Integrated circuit for signal discrimination R ₀ -R ₁₅ : Resistance

C: capacitor

According to the present invention, the set temperature at the time of going to bed is lowered slightly to maintain the temperature suitable for sleep, and when going out, the boiler pipe is freeze-protected and the room temperature after returning home is quickly activated. It is about a temperature control device of a boiler that can automatically go out (optimum temperature control) function that can raise to a comfortable temperature.

In general, in heating a house using a boiler. The conventional method is an on-off control method in which the indoor temperature is maintained at a predetermined temperature set by a room temperature controller (Romm Themostat) installed indoors, and the water temperature of the boiler is also installed in the boiler body (Aquarstat). It is controlled at a constant temperature set by the water heater and stops operation if there is no water in the boiler, and when the boiler is overheated to an abnormal temperature, it adopts a heating operation method so that the operation is stopped. As a temperature control method based on indoor air temperature, this method is applied to Ondol heating system in Korea as it is. In this situation, the heat dissipation of the heating element floor is suppressed by the futon laid on the floor at bedtime. As the increase in the temperature of the boiler is slowed down, the operating time of the boiler becomes longer, It is not good for the health, such as the waste of fuel, the temperature of the floor is too high, the back is hot, the face is cold and the body's blood circulation is unbalanced. Frequently appeared.

In addition, conventionally, since it took a long time to operate the boiler after returning home for a long time to achieve normal heating, there was a problem that the cold fell for a long time in cold weather.

The present invention is made in view of the deficiency of the conventional boiler, and installed a control device that can automatically perform the bed temperature control function and the optimum temperature control function to go out in the boiler to know the temperature of the floor during sleep It keeps comfortable sleeping temperature and prevents freezing of boiler heating pipes by automatically controlling boiler operation (intermittent driving of boiler) at optimum temperature even when the house is vacant due to long-term outing in cold weather in winter. In addition, the purpose of the present invention is to realize efficient heating by allowing the temperature rise rate to the indoor activity volume temperature after returning home.

Hereinafter, described in detail with reference to the accompanying drawings of the present invention.

FIG. 1 is a block diagram of the present invention, when the user goes to bed in the boiler 1 installed at any place outdoors and the transmitter 2 installed indoors, presses the sleep function selection switch 21 to go out of the sleep signal. When the outgoing signal is transmitted by pressing the outgoing function selection switch 22, the corresponding signal is transmitted to the controller 12 installed in the boiler through the signal transmission line 3 connected thereto. That is, the remote control of the controller 12 is performed by the operation of the transmitter 2.

Here, the controller 12 installed in the boiler 1 may be directly installed in the boiler 1, as shown in FIG. 1, or may be separately installed in any place of the room.

First, assuming that the sleep signal is transmitted to the controller 12, the controller 12 in which the microcomputer (microcomputer) is embedded receives this signal and then receives a predetermined time (e.g., 1 hour) by a predetermined program stored in the microcomputer. The boiler is controlled to maintain the current temperature, but after the designated time elapses, the temperature is controlled to gradually lower the temperature (room temperature) to reach a comfortable temperature at bedtime. An example follows.

Indoor set temperature (℃)-(Indoor set temperature × 0.1) (℃) = Sleep temperature

(In this case, the indoor set temperature means the indoor active comfort temperature before going to bed, and the bed temperature refers to the temperature of the room at the time of sleeping on the heating floor)

In other words, the room set temperature × 0.1 (℃) is the optimal bedtime temperature (10% of the room set temperature)

Sleeping heating by this sleep function keeps up to 30 minutes before the designated weather time and gradually rises to wake up in a room where the fresh indoor temperature is maintained together with a signal (e.g., a melody signal) that informs the weather. This process is shown in diagram 2a.

If the sleep time is not constant and the weather time cannot be predicted, the sleep control release signal may be sent after wake-up, such as the curve of FIG. 2 (b), to control the indoor temperature by the set temperature. Temperature setting value for adjustment, seasonal temperature setting value for statistical heating) If the microcomputer is not used for the controller 12, that is, the temperature from the moment of pressing the sleep function selection switch 21 by slightly modifying the input circuit of the conventional temperature controller. The set value may also fall to bed comfort temperature.

If necessary, the transmitter 2 may be incorporated in the boiler 1 as shown in FIG. 1B.

On the other hand, when explaining the freeze protection function when going out, pressing the outgoing function selection switch 22 installed in the transmitter 2 in Fig. 1 as shown in Fig. 3 the boiler temperature set value for freeze protection from the active comfort temperature The temperature drops to the set temperature (outside optimal temperature, eg 5 ℃ for the room temperature and 35 ℃ for the boiler's heating water temperature) (solid line), and the circulation pump is spaced at regular intervals ( For a short period of time, eg, 5 minutes at 3 hour intervals, when the water cooled in the floor and piping is drawn into the boiler and the temperature is above the freezing protection temperature (safety temperature that can completely prevent freezing) (eg; Burner of a ₁ , b ₁ , d ₁ , point 3 of FIG. 3 is not operated and burner only when boiler temperature drops below set temperature (35 ℃) for freeze protection (e.g. c ₁ , e ₁ point of FIG. 3) while the jamgan (e; c _3, e ₃₎ copper And it is possible to prevent freezing of the next with a minimum of fuel consumption by being stopped plumbing perform combustion operation.

Considering the relationship between the transmitter 2 and the signal transmission line 3 in realizing this function of the present invention, the transmitter 2 is generally made integral with a room themostat installed indoors. Since the embodiment of the present invention will be described with reference to FIG. 4 as shown in FIG. 4A, each function of the transmitter 2 is controlled by the signal transmission line 31 when the sleep function selection switch 21 is pressed. The sleep function selection signal is transmitted, and when the out function selection switch 22 is pressed out, the out function selection signal is transmitted to the controller 12 through the signal transmission line 32, and the hot water function selection switch 23 is When pressed, the hot water control signal is the signal transmission line 33 and the temperature control switch 24 is turned on, and the temperature control signal is the signal transmission line 34, that is, includes a common line 35 connected to the common terminal 25. Each function control signal is transmitted through 5 signal transmission lines Will be sent.

However, in this case, the structure of the transmitter 2 and the controller 12 is simplified, so there is an advantage in manufacturing. However, in general, the structure of the transmitter 2 and the controller 12 can be used for the 2-strand signal transmission line laid for the room temperature controller. There is no difficulty in laying five additional signal transmission lines.

However, as shown in FIG. 4B, a signal converter 26 is added to the transmitter 2 so that each time a function selection switch is pressed, a signal having a different pulse width is generated to generate a single signal transmission line 36. By using a method of transmitting all signals with only the common line 35, it is possible to use two already installed signal transmission lines 35 and 36 for the indoor temperature controller.

Herein, the operation of the signal converter 26 applied to the two-wire transmission method will be described in more detail. When the sleep function selection switch 21 is pressed, the pulse converter has a relatively short pulse duration (for example, 1 ms) in the signal converter 26. A signal is transmitted to the controller 12 through the signal transmission line 36, and when the outgoing function selection switch 22 is pressed, a continuous pulse having a relatively long pulse duration (for example, 2 ms) is generated and transmitted, and a hot water function selection switch ( 23), pulses having a medium pulse duration (e.g., 1.5 ms) of both are transmitted to the control path 12. When the temperature control switch 24 in the magnification control unit 28 is operated, each pulse Signal is extended by n times (e.g., 3 times, 3ms, 4.5ms, 6ms), and six different signals are transmitted through only two signal transmission lines (36) and (35). Will be sent to the controller.

The process of generating and transmitting such a signal, receiving the signal, and determining the signal will be described with reference to the circuit diagram of FIG. 5 and the signal waveform diagram of FIG.

First, the transmitter 2 is connected in series with the resistors R ₁ , R ₂ , and R ₃ , respectively, so that the transmitter 2 is parallel between the input terminal D and the threshold terminal Th of the integrated circuit IC ₁ for time. A function selector 27 configured to select sleep, out, and hot water supply function switches 21, 22, and 23 for selecting sleep, out, and hot water function, an integrated circuit (IC) and a capacitor (C) for a timer. And a resistor (R ₀ ) (R ₄ ) configured to generate an output signal of a square wave having pulse widths of different time constants according to driving states of the function selection switches 21, 22, and 23. (26) and; It consists of a temperature control switch 24 provided between the control voltage terminal (con) of the integrated circuit IC ₁ for the timer and the connection point of the distribution resistor (R ₅ ) (R ₆ ) to drive the temperature control switch (24). It is composed of a magnification control unit 28 for extending the output signal of the signal converter depending on whether or not.

In addition, the controller 12 is composed of a waveform shaping circuit composed of a signal discriminating integrated circuit (IC ₂ ) and resistors (R ₉ -R ₁₅ ) and a distribution resistor (R ₇ R ₈ ) to output from the transmitter (2). A signal discriminator 16 which receives predetermined function selection signals through transmission lines 35 and 36, respectively, and determines a current function selection state and inputs them to the microcomputer 17; If the predetermined function selection signal output from the signal discriminator 16 is recognized as the sleep function selection by executing a predetermined program, the sleep temperature control function is performed to maintain the combustion state of the boiler at a suitable room temperature for sleeping. In addition, it is composed of a microcomputer 17 which performs a control function to prevent the freezing of the pipes of the boiler and to increase the room temperature after returning to the active comfort temperature in a short time if it is recognized as the selection of the outing function.

Here, the control circuit installed in the controller 12 may be configured as a general integrated circuit (IC) in addition to the microcomputer. Or it may be configured as a hybrid integrated circuit.

In FIG. 5, the first sleep among the three function selection switches 21, 22, 23 in the function selection unit 27 connected in parallel between the D terminal and the threshold terminal Th of the timer integrated circuit IC _{1 is} shown. When the function selection switch 21 is pressed, the time constant TW ₁ = αR ₁ C formed together with the capacitor C connected between the trigger terminal Tr and the ground terminal G of the integrated circuit IC ₁ for the timer. A continuous pulse wave having a constant pulse width (e.g., 1 ms) determined by?) Is oscillated so that its output is displayed on the output terminal OUT of the timer integrated circuit IC ₁ .

At this time, if a resistor R ₀ capable of flowing a relatively large current (eg, 10 mA) is connected to the output terminal OUT of the integrated circuit IC ₁ for the timer, the current flowing through the signal transmission line 35 is When the output terminal OUT is at low potential, a relatively small current (for example, 2 mA) is formed, and at high potential, a regular square current pulse is changed to a relatively large current (for example, 12 mA) (see FIG. 6a). .

When the current pulse wave is connected to the input terminal of the signal discriminator 16, the current flowing through the resistor R ₁ changes according to the waveform of the pulse wave, so that the voltage drop value generated at both ends of the resistor R ₇ ( V ₇ ) as shown in FIG. 6B, where the current pulse wave is converted into a voltage pulse wave, and the voltage across the resistor R ₈ is obtained by subtracting the voltage across the resistor R ₇ from the constant voltage power supply Vcc at this time. Since the highest and lowest values of voltage V ₈ (see also FIG. 6b) are changed to high potentials (eg 4V and 3V), these voltage pulses cannot directly enter the digital input circuit of the microcomputer 17. .

Therefore, the divided voltage by the distribution resistor R ₇ (R ₈ ) is determined by the waveform shaping circuit composed of the signal discriminating integrated circuit IC ₁ and the resistors R ₉ -R ₁₅ . The low voltage value suitable for the input voltage is converted into a pulse wave alternately (for example, 0.2 V and 4.7 V) (see also FIG. 6C) so that the voltage pulse waveform is input to the digital input circuit of the micro computer in the controller 12. The computer measures the pulse width of the input signal and recognizes that the sleep function selection signal has been reached.

Therefore, the boiler is switched to sleep operation, which actually stops the heating operation (until the sleep temperature condition is met).

Then, pressing the go function selection switch 22 causes the oscillation of a continuous square wave pulse having a larger pulse width (e.g., 2 ms) with a pulse width equal to the time constant determined by the value of time constant TW ₂ = α R ₂ C. Therefore, a wider voltage pulse wave is formed at the output terminal of the signal discrimination integrated circuit IC ₂ , which enters the microcomputer input terminal, detects the pulse width, and recognizes that the go-out function selection signal has entered. Therefore, the boiler switches to the outgoing function and stops operation (until the outgoing temperature condition is reached).

In this way, when the hot water function selection switch 23 is pressed, a pulse wave having a medium pulse width (for example, 1.5 ms) between the two enters the microcomputer and the computer recognizes this as a hot water function selection signal.

However, when the temperature control switch 24 installed in the magnification control unit 28 of the transmitter 2 built in the room temperature controller becomes 'on', each of the above time constants depends on the ratio of the resistances R ₅ : R ₆ . It is cremated at a constant magnification (eg 3 times) and input to a microcomputer.

For example, in the case where the magnification is 3, the temperature control switch 24 in the magnification control unit 28, which is 'off' because the room temperature is lowered while the sleep function selection switch 21 is pressed (during sleep mode operation), In this case, the sleep function selection signal output in the 1ms width is extended and converted into the pulse width of 3ms and input to the microcomputer in the controller 12 through the signal discriminator 16. Then, the microcomputer recognizes this extended signal as a sleep signal and simultaneously recognizes it as a boiler start signal to operate the boiler below the sleep setting temperature.

In addition, even in the case of the outgoing function selection signal, when the temperature control switch 24, which was 'off' due to a decrease in the room temperature during the outgoing operation operation (a state in which the boiler operation was stopped), was output with a pulse width of 2ms. The go out function selection signal is converted into a pulse width of 6ms and input to the micro computer. Therefore, the micro computer recognizes this extended signal as the go out function selection signal and simultaneously recognizes it as a boiler operation signal. It will be operational.

In addition, in the case of the hot water supply function selection signal, when the hot water supply function selection switch 23 is pressed, the temperature control switch 24 is turned on at the same time, so that the hot water supply signal extended to 4.5 ms is input to the micro computer. In this case, the signal is recognized as the hot water function selection signal, and at the same time, it is recognized as the boiler operation signal to start the boiler below the hot water set temperature.

Therefore, the controller 12 can automatically control the sleep, hot water supply, and the outing function according to each signal input input to the computer according to a predetermined function selection signal input from the transmitter 2.

The description illustrated above relates to the transmitter 2 and the signal discriminator 16 which send four signals to a signal transmission line composed of two wires so that each command can be recognized. Various methods of sending the sleep function selection signal and the outgoing function selection signal will be covered.

As described above, the present invention is to automatically maintain the indoor heating temperature at the active comfort temperature during the time when the person is active, not only to maintain the bed comfort temperature suitable for bedtime during bedtime, but also to maintain the optimum temperature when going out When the normal operation switch of the boiler is pressed after returning home, it is possible to reduce the time to reach the active comfort temperature by preventing freezing and prevent the inconvenience of falling cold until the boiler is operating normally. It is a groundbreaking invention that its practical value is further enhanced.

Claims (9)

Hot water boiler with heating function and hot water supply function. The pulse widths of the different time constants are different depending on the driving state of the function selection unit 27 for selecting the sleep, outing and hot water supply functions, and the function selection switches 21, 22, 23 of the function selection unit 27. A transmitter 2 composed of a signal converter 26 for generating a square wave output signal having; When selecting the sleep function according to the output signal of the transmitter (2) performs a sleep temperature control function that maintains the room temperature suitable for bedtime, and when selecting a going out function, the room temperature after returning home to the active comfort temperature quickly The temperature control device of the boiler, characterized in that consisting of a controller (12) to perform the outgoing temperature control function to recover the rise. According to claim 1, Predetermined function selection signals output from the signal converter 26 in the transmitter 2 via the signal discriminator 16 to the microcomputer 17 in the controller 12 to sleep and go out function Temperature control device of the boiler, characterized in that the control is carried out. The temperature control apparatus of the boiler according to claim 1, wherein the signal converter (26) comprises a timer circuit (IC ₁ ) and a resistor (R ₀ ) (R ₄ ). 2. The function selector 27 is connected in series with resistors R ₁ , R ₂ , and R ₃ , respectively, so that an input terminal D and a threshold terminal of the integrated circuit IC ₁ for a timer are provided. The temperature control device of the boiler, characterized in that composed of the bed, go out and hot water supply selection switch (21) (22) (23) connected in parallel between (Th). The method of claim 1, wherein the predetermined function selection signals output from the signal converter 26 in the transmitter 2 are input to the hybrid integrated circuit or the integrated circuit in the controller 12 so as to be performed with the sleep and go function control. Boiler temperature control device. 3. The signal discriminator (16) according to claim 2, wherein the signal discriminator (16) comprises a waveform shaping circuit composed of a signal discriminating integrated circuit (IC ₂ ) and resistors (R ₉ -R ₁₅ ) and a distribution resistor (R ₇ ) (R ₈ ). Boiler temperature control device characterized in that the configuration. The temperature control device of a boiler according to claim 1 or 2, wherein the temperature of the bed is lowered to a room setting temperature of 0.1 (占 폚) at the time of the sleep function to maintain a sleeping comfort temperature in ondol heating. The temperature control device of the boiler according to claim 1 or 2, wherein the boiler has a function of going out so that the boiler is operated for a while when the room temperature falls to 5 ° C during the function of going out. The temperature control device of the boiler according to claim 1 or 2, wherein the boiler is operated for a while when the temperature of the heating water in the boiler falls below 35 ° C during the outgoing function.

Images