KR0127780Y1 - Temperature controller of on/off combustion type hot water supplier - Google Patents

Abstract

The present invention relates to a gas boiler of the on / off method, and more particularly, to reduce the variation of the hot water temperature generated when using the hot water mode of the on / off type gas boiler that can stably control the temperature of the hot water supplied It relates to a hot water temperature control device.

The hot water temperature control device of the on / off type gas boiler of the present invention includes: a direct water supply pipe (6) to which direct water is supplied, a heat exchanger (3) for raising the cold water of the direct water supply pipe (6), and the heat exchanger ( In the gas boiler including a hot water supply pipe (7) for tapping the hot water heated from 3) and a microcomputer (14) for controlling the entire stroke, both ends of the direct water supply pipe (6) and the hot water supply pipe (7) A pipe 12 for connecting; An solenoid valve 11 installed in the middle of the pipe 12 to control the movement of water; And a hot water temperature sensor 13 for measuring a temperature of hot water, wherein the solenoid valve 11 is controlled by the microcomputer 14.

Description

Hot water temperature control device of on / off type gas boiler

1 is a schematic configuration diagram of a gas boiler conventionally used.

Figure 2 is a partial cross-sectional view showing the installation state of the hot water temperature control device according to the present invention.

3 is a partial block diagram of a circuit used in the present invention.

4 is a flowchart showing the operating state of the hot water temperature control device of the present invention.

* Explanation of symbols for main parts of the drawings

1: gas valve 2: burner

3: heat exchanger 4: exhaust fan

5: Flow valve 6: Direct water supply pipe

7: hot water supply pipe 8: circulation pump

9: three-way valve 11: solenoid valve

12 pipe 13 hot water temperature sensor

14: micom

The present invention relates to a gas boiler of the on / off method, and more particularly, to reduce the variation of the hot water temperature generated when using the hot water mode of the on / off type gas boiler that can stably control the temperature of the hot water supplied It relates to a hot water temperature control device.

Gas boilers use clean fuel gas to prevent environmental pollution and are increasingly being used due to their convenience in operation.

1 shows a schematic configuration of a conventionally used gas boiler, and an operation state thereof will be described with reference to this. Gas whose gas supply amount is controlled by the gas valve 1 is supplied to the burner 2 through the gas supply pipe. The gas supplied to the burner 2 is ignited and combusted by the flame discharged from the spark igniter operated by the control signal output from the main controller M. The hot heat generated by the combustion heats the heat exchanger 3 located on the upper side.

The gas valve 1 determines the gas pressure in the main controller M according to the temperature set by the user, and opens the gas valve 1 by applying a predetermined current value to the gas valve 1 to generate the determined gas pressure. do. Thereafter, the main controller M outputs a control signal to the exhaust fan 4 so as to rotate the exhaust fan 4 at a predetermined rotation speed in order to supply the air volume suitable for the gas pressure.

In the heating mode, the heating water heated in the heat exchanger 3 is moved through a pair of pipes installed on the side. That is, the heated heating water passes through the heating pipe installed in the room through the pipe S, and returns through the pipe R again. After the returned heating water flows into the water tank, it passes through the pipe S again through the three-way side 9 and flows into the heat exchanger 3. The pipe S is a heating water supply pipe, the pipe R is a heating return pipe, and the pipe B is a discharge pipe.

On the other hand, when hot water is supplied, direct water (cold water) flows into the heat exchanger (3) through the direct water supply pipe (6), and is heated by heat exchange with heating water in the heat exchanger (3) and then through the hot water supply pipe (7). Supplied to the user. Reference numeral 5 is a flow valve that detects the inflow of direct water and informs the main controller (M). At this time, the operation state of the three-way side (9) blocks the moving path to the pipe (B) in accordance with the control signal of the main controller (M), the heating water is pipe (S)-three-way (9)-circulation The closed circuit of the pump 8-heat exchanger 3 is circulated.

In the on / off gas boiler operating as described above, when the hot water temperature exceeds the set temperature while using hot water in the hot water mode, the microcomputer detects this and outputs a control signal to control the hot water temperature to shut off the gas valve. It was. After that, when the temperature of the hot water was lower than the set temperature again, the gas valve was controlled to burn the burner again.

However, since the on / off is repeated in the burner of the gas boiler as described above, the temperature of the hot water is too high or lower than the set value, and even cold water is tapping.

The present invention is devised to solve the above problems, the object of the present invention is to provide a convenience in using hot water by reducing the deviation of the hot water temperature generated when using hot water in the on / off gas boiler. It is.

It is another object of the present invention to provide a hot water temperature control device that operates stably by minimizing on / off that is frequently generated when hot water is used in an on / off boiler.

Hot water temperature control device of the on / off type gas boiler of the present invention for achieving the above object: a direct water supply pipe (6) is supplied with direct water, and a heat exchanger (3) for raising the cold water of the direct water supply pipe (6) And a hot water supply pipe (7) for tapping hot water heated from the heat exchanger (3), and a microcomputer (14) for controlling the entire stroke, wherein the direct water supply pipe (6) and the hot water supply pipe A pipe 12 connecting the both ends of (7); An solenoid valve 11 installed in the middle of the pipe 12 to control the movement of water; And a hot water temperature sensor 13 for measuring a temperature of hot water, wherein the solenoid valve 11 is controlled by the microcomputer 14.

Hereinafter, the hot water temperature control device of the on / off gas boiler of the present invention will be described in detail with reference to the accompanying drawings.

The hot water temperature control device of the present invention is for preventing the temperature non-uniformity of hot water generated during the use of hot water in the hot water mode of the on / off gas boiler, between the hot water supply pipe connected to the heat exchanger (3) and the hot water supply pipe. By installing a separate pipe with a small diameter, by supplying direct water directly to the hot water to change the hot water temperature is to adjust the hot water temperature.

2 is a partial cross-sectional view showing a state in which the hot water temperature control device according to the present invention is installed. As shown, a direct water supply pipe 6 connected to one side of the conventional heat exchanger 3 and supplied with cold cold water, and a hot water supply pipe 7 for supplying hot water heated after being heated up by the heat exchanger 3. Is indicated.

In addition, between the direct water supply pipe 6 and the hot water supply pipe 7 is further provided with a separate pipe 12 for connecting them. The pipe 12 should use less than the diameter of the supply pipes 6,7, which can be changed as long as it does not interfere with the supply of hot water to the diameter of the supply pipes 6,7 actually used.

In the middle of the pipe 12 is provided a solenoid valve 11 as a means for controlling the amount of water passing through the pipe 12. When the solenoid valve 11 is turned on, the direct water passing through the direct water supply pipe 6 flows into the hot water supply pipe 7 and is mixed with hot water of high temperature. Thus, the temperature of the hot water drops.

In order to adjust the amount of water to be mixed, it is preferable that the solenoid valve 11 uses a variable valve of a kind whose opening degree varies depending on the current value or the voltage value input to the valve.

In addition, the lower end side surface of the hot water supply pipe 7 is attached with a hot water temperature sensor 13 for measuring the temperature of the hot water being tapped. The hot water temperature sensor 13 may use a temperature measuring element such as a thermistor which is commonly used, and both terminals of the sensor 13 are connected to the microcomputer 14 by an electric wire (not shown).

When the temperature of the hot water is measured, the change value of the voltage is output through the terminal, and the microcomputer 14 detects the voltage value and measures the temperature of the hot water. At this time, since the temperature data according to the voltage value is built in the microcomputer 14, the microcomputer 14 can detect the temperature value of the hot water.

In addition, in order to prevent a case in which hot water flows back into the direct water supply pipe 6 when direct water is supplied from the direct water supply pipe 6 to the hot water supply pipe 7, a backflow prevention device is installed in a portion of the pipe 12. It is also possible.

The operation and effect of the hot water temperature control device of the on / off type gas boiler according to the present invention having the above structure will be described in detail with reference to the block diagram of FIG. 3 and the flowchart of FIG. 4.

3 is a block diagram showing a connection state of the device of the present invention, in which a microcomputer 14, a hot water temperature sensor 13, a solenoid valve 11, and a gas valve 1 are connected. The operating state of each of the components is the same as in the above description, in the initial state the solenoid valve 11 is turned off, that is, to block the pipe 12 to maintain a state of no movement of water.

After the user sets the hot water temperature to use hot water, the hot water tapping valve (not shown: typically, a water valve in the shower or a hot water valve in the sink) is supplied with cold water to the boiler. The direct water is supplied through the direct water supply pipe (6). The supply of the direct water outputs a signal indicating the inflow of the direct water from the flow valve 5. The microcomputer 14 detects this and controls the gas valve 1 to supply gas to the burner 2.

The gas supplied to the burner 2 is combusted after being ignited by the spark igniter. The high temperature heat generated by this combustion heats the heat exchanger 3, and the heating water inside the heat exchanger 3 is heated and forcedly circulated by the circulation pump 8 in a closed circuit of the hot water mode. The combusted gas passing through the heat exchanger 3 is forcibly discharged to the outside by the exhaust fan 4. Heat exchange is performed between the high temperature heating water in the heat exchanger 3 and the cold water in the direct water supply pipe 6, and the hot water heated by the heat exchange is discharged again through the hot water supply pipe 7.

At this time, the temperature of the hot water discharged is measured by the hot water temperature sensor (13). The measured hot water temperature is converted into a corresponding voltage or current value and input to the microcomputer 14. The microcomputer 14 has a pre-stored hot water temperature data set by the user. The microcomputer 14 compares the input hot water temperature with a user set hot water temperature. At this time, the temperature comparison method compares the voltage value proportional to the measured hot water temperature and the height of the voltage value (or current value) corresponding to the preset hot water temperature. This is done using the comparator built into the microcomputer.

If the user set temperature is higher than the hot water temperature currently tapping, the microcomputer 14 turns on the solenoid valve 11 to open the inlet. A portion of the cold water that is moving the direct water supply pipe 6 along the open inlet is moved to the hot water supply pipe 7 and mixed with the hot water. Therefore, hot water and cold water are mixed, so the temperature of the hot water drops.

In this case, in order to appropriately adjust the amount of water flowing into the solenoid valve 11, it is preferable to use a variable valve in which the opening degree of the inlet varies according to the applied voltage or current value. This can be easily accomplished by the prior art. After the solenoid valve 11 is opened, the microcomputer 14 continuously measures the hot water temperature data input from the hot water temperature sensor 13 and closes the solenoid valve 11 when the user set temperature and the hot water temperature have the same value. Shut off the supply of water.

If the user set temperature is lower than the hot water temperature currently being tapped while using hot water, the microcomputer 14 turns off the solenoid valve 11 to close the inlet. At this time, the microcomputer 14 can adjust the closing degree of the solenoid valve 11 based on the measured hot water temperature. If the user set temperature and the hot water temperature has the same value, the microcomputer 14 outputs a control signal to turn off the solenoid valve 11. For example, when the temperature difference is -5 ° C, the degree of opening of the solenoid valve 11 is adjusted to supply the amount of water directly to X per second.

However, it is preferable to set the allowable range of the set temperature and the hot water temperature because it is very difficult to have the same value as the user set temperature and the hot water temperature as described above. This is a factor that can be determined when designing a program stored in the microcomputer. For example, the temperature allowable range may be set to about ± 5 ° C based on the set temperature (T1) set by the user. Of course, it is preferable that the above range has a lower value than the conventionally used allowable range.

Therefore, if the set temperature is 50 ℃ the temperature range of the hot water may be 45 ~ 55 ℃ range. It is obvious to those skilled in the art to which the present invention pertains that the above temperature range is, of course, intended to be illustrative and not limited thereto. In this way, frequent on / off of the solenoid valve 11 can be prevented. This temperature polarization is preferably set to a temperature deviation such that the user does not feel a large temperature deviation.

In addition, by adjusting the temperature of the hot water tapping through the hot water supply pipe in accordance with the set temperature as described above, it is also possible to prevent deterioration of the boiler by reducing the on / off operation of the gas boiler caused by the overheating of the conventional hot water.

As described above, according to the present invention, there is an advantage that uniform hot water can be used by reducing a temperature difference in hot water generated when hot water is used in an on / off gas boiler.

Although the present invention has been described in detail only with respect to the embodiments described, it will be apparent to those skilled in the art that the present invention may be modified or changed within the spirit and scope of the present invention. something to do.

Claims (3)

A direct water supply pipe 6 through which direct water is supplied, a heat exchanger 3 for heating up the cold water of the direct water supply pipe 6, a hot water supply pipe 7 for tapping hot water heated from the heat exchanger 3, In the gas boiler comprising a microcomputer (14) for controlling the entire stroke, the pipe 12 for connecting both ends of the direct water supply pipe (6) and hot water supply pipe (7); A solenoid valve (11) installed in the middle of the pipe (12) to control the movement of water, and on / off according to a control signal of the microcomputer (14); And a hot water temperature sensor 13 for measuring the temperature of the hot water to be heated and transferring the measured hot water temperature data to the microcomputer 14. . The pipe 12 is further provided with a backflow prevention device for preventing hot water from flowing back to the direct water supply pipe 6 through which the cold water flows from the hot water supply pipe 7 through which the hot water is tapped out. Hot water temperature control device of on / off type gas boiler. The hot water temperature control apparatus of on / off type gas boiler according to claim 1, wherein the solenoid valve is a variable solenoid valve whose degree of opening varies according to a control signal applied thereto.