KR960004849B1 - Safety device for boiler - Google Patents

Abstract

The device prevents a boiler from freezing and enhances the reliability. Each of the thermostats(Th1, Th2) is installed on a main body(1) and a circulation pipe(17) respectively. The anti-freezing mode is started when one of the thermostats detects the freezing temperature. The mode is stopped when all the thermostats detect temperature higher than a reference temperature.

Description

Boiler freezing prevention method and apparatus

1 is a block diagram of a controller for explaining an apparatus of the present invention.

2 is a schematic configuration diagram of a gas boiler to which the present invention is applied.

3 is a flowchart for explaining the method of the present invention.

4A and 4B are schematic configuration diagrams of a gas boiler for explaining a conventional freezing prevention device.

* Explanation of symbols for main parts of the drawings

1: Main body 2: Manual operation device

11: control unit 11 ': microcomputer

13: heat exchanger 14: circulation pump

15,16: temperature detection unit 17: circulation pipe

18: pump drive 111-113: A / D converter

114: freezing operation mode determination unit 115: temperature recognition unit

116: temperature comparison unit 118: drive output unit

117: freezing operation transition unit 119: control part drive unit

Th1, Th2: Dummyster

The present invention relates to a method for preventing a freezing of a boiler and an apparatus thereof, and in particular, a predetermined dummyster is installed in a circulation pipe and a main body of a boiler to detect a freezing temperature in any one of them. A method and apparatus for preventing freezing of a boiler to be performed.

In the conventional gas boiler, a predetermined dummyster Th2 is installed inside or outside the main body 31 of the boiler as shown in FIG. 4A of FIG. 4, or as shown in FIG. 4B of FIG. 4, the heat exchanger 32 and the heating pipe ( 33) A predetermined dummyster (Th1) is installed in the circulation pipe connected between and detects the temperature inside the pipe, the inside of the main body or the outside through each dummyster, and when the freezing temperature is detected, freezes to drive the circulation pump (P). It was the structure which prevented operation was performed.

However, in the system in which the dummyster Th2 is installed inside or outside the main body 31 to perform the freezing prevention operation, when the boiler is installed indoors, the temperature of the room generally falls below the freezing detection temperature. Although it is difficult, there is a problem that the outdoor cold air enters the boiler during the shutdown of the boiler and freezes the pipe such as the heat exchanger 32.

That is, the cold air coming in the flue first stays or flows in the inner space of the duct and the heat exchanger, so in the case of the boiler installed only the dummyster Th2, the diffusion of the cold air into the inner space of the main body is delayed. There is a problem that the heating circulation water in the pipe around the heat exchanger is frozen before Th2) detects the freezing temperature and performs the freezing operation.

In addition, in the case of the boiler in which only the dummyster Th1 is installed in the circulation pipe between the heat exchanger 32 and the heating pipe 33, first, when the boiler is installed indoors, the ventilation hole or the like is stopped while the boiler operation is stopped. Even though the water circulation system of the boiler reached the freezing temperature due to the introduction of cold air into the room, or the temperature inside the main body reached the freezing temperature due to the influence of the outside air temperature when the sealer was installed outdoors, During the use of the boiler, the dummyster (Th1) in the circulation pipe delays the freezing temperature by the time it takes for the heated water temperature to fall to room temperature, so that the freezing operation starts after the heating piping part or the distributor is already frozen. .

An object of the present invention, when the temperature in the circulation pipe formed inside or outside the main body of the boiler or between the heat exchanger and the heating pipe is detected as a freezing temperature below a predetermined temperature, the freezing operation is performed immediately so that the installation position of the boiler (indoor or outdoor) Regardless of the present invention, there is provided a method and apparatus for preventing freezing of a boiler which can prevent freezing and thereby further improve reliability of a product.

The above object can be achieved by installing predetermined dummysters in the circulation pipe and the main body of the boiler, respectively, so that the freezing prevention operation is performed when the freezing temperature is detected in any one of them.

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

As shown in Figs. 2 and 3, the method of the present invention comprises: a control unit 11 connected to an external manual operation device 2 inside the main body 1 to control the overall operation of the boiler; A water tank 12 for storing heating circulation water; A heat exchanger 13 for warming water; In a boiler in which a circulation pump (14) for circulating heating water is provided, a freezer temperature detection dummy (Th2) is installed inside or outside the main body (1), and a heat exchanger (13) and a heating pipe ( 19) In the circulation pipe 17 between the tapping temperature detection dummyster (Th1) is installed, if any of the freezing prevention operation temperature point is detected in the control unit 11 performs a freeze operation immediately, two more When the freezing operation stop temperature point is detected at both the Mr (Th1, Th2), the freeze protection operation is stopped.

That is, when the operation switch is turned 'off' while the power cord of the boiler is plugged in, the temperature detected through the dummyster Th1 installed in the circulation pipe 17 is equal to or lower than a predetermined temperature (Y ° C.), or the main body 1 Continuously detect whether the temperature detected by the dummy (Th2) installed inside or outside is below a predetermined temperature (Z ° C) so that the temperature detected by the dummy (Th1) is below the freezing temperature (Y ° C) or the dummyster If the temperature detected in Th2 is equal to or lower than the freezing temperature (Z ° C.), the freezing prevention operation is performed, and the temperatures detected by the dummysters Th1 and the dummysters Th2 during the freezing prevention operation as described above. At the same time detects whether the freezing prevention operation stop temperature (P ℃) or (Q ℃) or more if the conditions are satisfied with the process of stopping the freeze protection operation, wherein the freezing prevention operation temperature point and the temperature of the stop P ℃> Q ℃> Y ℃> Z ℃ conditions Have

FIG. 1 is a detailed block diagram of the control unit 11 of the apparatus of the present invention, centered on the microcomputer 11 '. The temperature of the dummysters Th1 and Th2 output as analog signals through the temperature detectors 15 and 16, respectively. A / D converters 111 and 112 for converting detection signals into predetermined digital values, respectively; An A / D converter 113 for converting various analog operation signals output from the manual operation device 2 into predetermined digital values; A freezing operation mode determination unit 114 which receives an operation signal of the manual operation apparatus 2 output through the A / D converter 113 and determines whether the operation mode is in a freezing operation mode; A temperature recognition unit 115 for receiving a control signal output from the freezing operation mode determination unit 114 and receiving a predetermined signal output from the A / D converters 111 and 112 to recognize a detection temperature; A temperature comparison unit 116 for receiving an output signal from the temperature recognition unit 115 and comparing a predetermined freezing operation temperature with a copper crystallization temperature; A freezing operation shifting unit 117 for outputting a freezing operation signal when a freezing temperature is detected by the temperature comparing unit 116; When the predetermined freezing operation signal is output from the freezing operation shifting unit 117, the control part driving unit 119 drives the circulation pump 14 through the driving output unit 118 and the pump driving unit 18.

Referring to the effects of the present invention as follows.

First, since both a dummyster Th2 for detecting a freezing temperature and a dummyster Th1 for detecting a tapping temperature and a freezing temperature of heating water are installed inside or outside the main body 1 of the boiler and the circulation pipe 17. For example, the cold air from the outside enters the boiler during the shutdown of the boiler and freezes the pipes near the heat exchanger (13), or the outside cold air flows into the room where the boiler is located through the ventilation holes, and the heating piping It is possible to prevent the freezing of the parts or the dispenser in advance. In other words, if the freezing temperature is detected in any one of the dummysters Th1 and Th2, the freezing operation is performed immediately. Therefore, the freezing and venting of the heat exchanger 13 near the heat exchanger 13 by the external cold air entering the boiler is performed. It is possible to prevent freezing of the heating piping and the distributor by the external cold air introduced through.

In other words, when the user stops the operation of the boiler and the combustion lamp of the boiler is stopped, the dummyster Th1 receives the external cold air through the year when the boiler is installed in the room disconnected from the outside. Since it is installed at a position that can detect the freezing temperature much faster than the freezing temperature, it is possible to detect the freezing temperature near the heat exchanger 13 due to the inflow of cold external air through the flue in a short time, and also the dummyster (Th2) When the boiler is installed outdoors is installed in a position that can detect the outside temperature faster than the dummy (Th1), the boiler is stopped during use to the circulation pipe (17) where the temperature of the dummy (Th1) was maintained at a high temperature Due to its inherent relationship, even if it is maintained at a temperature higher than the inside or outside of the boiler and room temperature, the detection of the dummyster Th2 is higher than the detection temperature of the dummyster Th1. Since the temperature detects the freezing prevention operation temperature first, the dummy heaters (Th1, Th2), which are complementary detection devices regardless of the indoor or outdoor installation of the boiler, allow the pipes and heating pipes near the boiler heat exchanger (13). 19) and the dispenser can be prevented from freezing in advance.

The temperature detectors 15 and 16 connected to the dummysters Th1 and Th2 respectively receive the output changes of the dummysters Th1 and Th2, respectively, to convert the A / Ds in the microcomputer 11 'of the controller 11. The A / D converters 111 and 112 receive the detected temperature output from the temperature detectors 15 and 16 as analog signals, and convert the temperature into a predetermined digital signal. Output to the recognition unit 115.

In addition, the temperature comparison unit 116 continuously receiving a predetermined output signal from the temperature recognition unit 115 compares whether the detected detection temperature is the predetermined freezing temperature and freezes the result. Output to the transition unit 117.

As a result, when any of the temperatures detected by the dummysters Th1 and Th2 reaches the freezing temperature, the freezing operation transition unit 117 sends a predetermined freezing operation signal to the control component drive unit 119 and the drive output unit 118. Since it is output to the pump driving unit 18 through), the circulation pump 14 is driven to prevent freezing regardless of the installation position (indoor or outdoor) of the boiler.

In this case, the temperature recognition unit 115 outputs a freeze operation transition signal when any of the temperatures detected by the dummysters Th1 and Th2 reaches the freezing temperature, but stops the freezing operation. The temperature condition of FIG. 3, that is, P ℃> Q ℃> Y ℃> Z ℃ is compared to the temperature point higher than Y ℃ and Z ℃ which are the freezing operation detection temperatures of the dummysters Th1 and Th2. When the temperature value is finally detected, the freezing operation stop signal is output to the freezing operation transition unit 117.

3 is a flowchart for explaining the method of the present invention. When the operation switch is 'off' while the power cord of the boiler is plugged in, the temperature detected through the dummyster Th1 installed in the circulation pipe 17 is increased. It continuously detects whether the temperature detected by the dummy temperature Th or below the predetermined temperature (Y ° C.) or the main body 1 is lower than or equal to the constant temperature (Z ° C.).

At this time, the predetermined freezing temperature (Y ° C.) detected by the dummy (Th1) is set higher than the freezing temperature (Z ° C.) detected by the dummy (Th2), which is built into the circulation pipe (17) and frozen. The detection temperature of the dummyster Th1 that detects the temperature is always higher than the temperature inside or outside the main body 1 by a latent heat of tapping of the heat exchanger, so that the detection temperature of the dummyster Th1 is set to compensate for this. The value is set higher than the detection temperature set value of the dummy freezer Th2 which is the actual freezing temperature.

If the temperature detected by the dummyster Th1 is equal to or less than the predetermined temperature (Y ° C) or the temperature detected by the dummyster Th2 is equal to or less than the predetermined temperature (Z ° C), the circulation pump 14 Freeze protection operation is performed.

In this way, while the freezing prevention operation is being performed, the temperature detected through the dummyster Th1 is higher than or equal to the predetermined temperature (P ° C) which is set higher than the freezing temperature (Y ° C), and is detected through the dummyster Th2. It is continuously detected whether the temperature is higher than the predetermined temperature (P ° C) set higher than the freezing temperature (Z ° C).

That is, while performing the freezing prevention operation, the ambient temperature of the circulating pipe rises above the predetermined temperature (P ℃) higher than the freezing temperature (Y ℃), and the outside air temperature inside or outside the boiler body is freezing temperature (Z ℃). If the temperature rises above a certain temperature (P ℃), the water circulation system and the heating piping or distributor in the boiler do not have to be frozen even if the freezing prevention operation is not performed. do.

The reason for having a temperature condition of P ° C> Q ° C> Y ° C> Z ° C is that Y °, which is the freezing operation detection temperature of the dummyster Th1, is higher than the freezing operation detection temperature (Z ° C) of the dummyster Th2. (Y ° C> Z ° C) In this regard, the freezing operation stop temperature is also set higher than P °, which is the freezing operation stop temperature of the dummyster Th1, than the Q ° C which is the freezing operation stop temperature of the dummyster Th2.

In addition, since Y ° C, which is the freezing operation detection temperature of the dummyster Th1, was not higher than P ° C or Q ° C which is the freezing operation stop temperature, Y ° C was set lower than P ° C or Q ° C.

That is, for example, if Y ° C is 10 ° C and Z ° C is 8 ° C, P ° C is 15 ° C and Q ° C is 12 ° C.

When the operation state is described in more detail with the above temperature value, the freezer operation is activated when the dummyster Th1 detects 10 ° C. or the dummyster Th2 at 8 ° C. first during either operation of the boiler. The freezing prevention operation is stopped when the temperature of the dummyster Th1 is 15 ° C or more and the temperature of the dummyster Th2 is 12 ° C or more.

Here, the reason why the freezing prevention operation stop temperature is a simultaneous detection value is that the freezing temperature may be the first of the heat exchanger pipe side as described above, or the heating piping or the distributor may be the first, depending on the installation location of the boiler. In either case, the freeze protection operation was activated once the freeze protection temperature was reached. However, for example, when the boiler was installed outdoors, the temperature of the dummyster Th2 became 8 ° C. or lower, and then the freeze protection operation was performed. The temperature of the dummyster Th1 detected 25 degreeC because it stopped using heating.

Afterwards, the boiler installed outside keeps detecting below 8 ℃ due to the influence of the outside temperature, but even though the heating water is being circulated by the pump 14, there may be a case where it maintains above 15 ℃ due to the residual heat during the heating circulation. Can be.

Therefore, if the freezing prevention operation stop temperature is stopped at P ℃ or Q ℃ or higher, the dummyster Th2 continues to be 8 ° C or lower, so the freezing operation condition or the dummyster Th1 is 15 ° C or higher, so the freeze operation stop temperature Although the actual outside temperature is below 8 ℃, which is the freezing prevention temperature point, if the freezing prevention operation is stopped due to the influence of the dummyster (Th1), the heating piping or the distributor, etc., is below 8 ℃ by the outside temperature (-5 ℃). Or -10 ° C.).

Therefore, the freezing stop temperature must be satisfied when two stop values (P ℃, Q ℃) are satisfied at the same time.

As described above, according to the present invention, a dummyster is installed in each of the circulation pipes formed inside and outside the main body of the boiler or between the heat exchanger and the heating pipe so that the freezing operation is immediately performed when the freezing temperature is detected in any one of them. The temperature point at which the preventive operation is performed is set higher than the dummyster Th1 installed in the circulation pipe than the dummyster Th2 installed inside or outside the boiler body, so that the delay time or the outside air that is changed from room temperature by latent heat after the boiler stops. The temperature is compensated for the dummyster Th1 in the circulating pipe that maintains a temperature higher than the dummyster Th2 exposed to the temperature, and the temperature point at which the freezing prevention temperature is terminated is the dummyster Th1 and the boiler in the circulation pipe. All of the dummysters Th2 installed inside or outside the main body are above a certain temperature (Th1≥P ℃ AND Th2≥Q ℃) Prevents freezing of heating pipes and distributors by cold air flowing in through the cooling vents and freezing near the heat exchanger by outside cold air coming into the boiler in the year by stopping the operation. It is possible to further improve the reliability of the product.

Claims (5)

A control unit 11 connected to an external manual operation device 2 inside the main body 1 to control the overall operation of the boiler; A water tank 12 for storing heating circulation water; A heat exchanger 13 for warming water; In a boiler in which a circulation pump (14) for circulating heating water is provided, a freezer temperature detection dummy (Th2) is installed inside or outside the main body (1), and a heat exchanger (13) and a heating pipe are installed. In the circulating pipe 17 between the installation 19 and the tapping temperature detecting dummy (Th1) is installed in any one of the freezing prevention operation temperature point is detected in the control unit 11 immediately performs a freeze operation, two Freezing prevention method of the boiler, characterized in that the process is made to stop the freezing prevention operation when detecting the freezing operation stop temperature point in the dummyster (Th1, Th2). The method of claim 1, wherein the freezing prevention operation temperature point is characterized in that the freezing temperature (Y ℃) detected by the dummy (Th1) is set higher than the freezing temperature (Z ℃) detected by the dummy (Th2). How to prevent freezing of boilers. According to claim 1, wherein the freeze prevention operation stop temperature point is the freeze operation stop temperature (P ℃) detected by the dummy (Th1) and the freeze operation stop temperature (Q ℃) detected by the dummy (Th2) is further. Freezing temperature (Y ℃) detected by the Mr (Th1) and freezing prevention method of the boiler, characterized in that it is set higher than the freezing temperature (Z ℃) detected by the dummy (Th2). The method of claim 2 or 3, wherein the freezing temperature (Y ℃, Z ℃) and freezing operation stop temperature (P ℃, Q ℃) has a temperature condition of P ℃> Q ℃> Y ℃> Z ℃ Freezing prevention method of the boiler characterized in that. The microcomputer 11 ′ in the control unit 11 controlling overall operation of the boiler receives the temperature detection signals of the dummysters Th1 and Th2 output as analog signals through the temperature detectors 15 and 16, respectively. And A / D converters 111 and 112 respectively converting them to; An A / D converter 113 for converting various analog operation signals output from the manual operation device 2 into predetermined digital values; A freezing operation mode determination unit 114 which receives an operation signal of the manual operation apparatus 2 output through the A / D converter 113 and determines whether the operation mode is in a freezing operation mode; A temperature recognition unit 115 for receiving a control signal output from the freezing operation mode determination unit 114 and receiving a predetermined signal output from the A / D converters 111 and 112 to recognize a detection temperature; A temperature comparison unit 116 which receives the output signal of the temperature recognition unit 115 and compares a predetermined freezing operation temperature with a freezing operation stop temperature; A freezing operation shifting unit 117 for outputting a freezing operation signal when a freezing temperature is detected by the onbo comparator 116; When the predetermined freezing operation signal is output from the freezing operation transition unit 117 is characterized in that it consists of a control component drive unit 119 for driving the circulation pump 14 through the drive output unit 118 and the pump driving unit 18. Freezing prevention device of the boiler.