KR100757312B1 - Method for controlling flux of radient coil - Google Patents

Abstract

A flow control method for a radiant heating coil is provided to prevent non-uniformity of heating operation, overheat, and noise caused due to cavitation when an error has occurred in a valve or excessive amount of hot water is supplied. A flow control method for a radiant heating coil, includes a first step(S10) of inputting a set value of the opening degree of a first valve; a second step(S11) of transmitting a first operating signal corresponding to the set value of the opening degree to the first valve; and a third step(S12,S13) of sensing the opening variation of the first valve in accordance with the first operating signal, and adjusting the degree of opening of a second valve in accordance with the variation of opening of the first valve. The third step includes a step(S16) of transmitting a second operating signal to the second valve if the variation of opening of the first valve is lower than a predetermined level.

Description

Flow control method of radiant heating coil {Method for controlling flux of radient coil}

1 is a flow chart related to the flow rate control method of the radiant heating coil according to the first embodiment of the present invention.

2 is a conceptual diagram related to a flow rate control method of a radiant heating coil according to a first preferred embodiment of the present invention.

Figure 3 is a flow chart related to the flow rate control method of the radiant heating coil according to a second embodiment of the present invention.

4 is a conceptual view of a flow control method of a radiant heating coil according to a second preferred embodiment of the present invention.

Figure 5 is a flow chart related to the flow rate control method of the radiant heating coil according to a third embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

11: first valve 12: second valve

21: First radiant heating coil 22: Second radiant heating coil

31: first block 32: second block

10: control unit 40: control unit

41, 42, 43, 44: valve

51, 52, 53, 54: radiant heating coil

The present invention relates to a flow rate control method of a radiant heating coil.

The heating of residential and active spaces, such as apartments or offices, burns fuel in a boiler, heats the fluid using the heat obtained at this time, and circulates the heated fluid.

In the West, a heating method is used to heat indoor air through a radiator (radiator). A radiator made of cast iron or steel is rapidly changed in temperature according to a change in the amount of heat supplied. The indoor air is heated to perform the heating operation.

On the other hand, in Korea, we use a hot water heating system that heats the floor using hot water and heats the indoor air through heat exchange on the surface of the floor. The hot water heating system uses heat source, pump, hot water distributor and piping for hot water supply. It consists of valves and various valves, and supplies heat to each room to maintain the room temperature by supplying hot water through the pipe when a load occurs.

The flow rate of hot water supplied to the chamber is related to the heat dissipation of the bottom radiant heating panel, and therefore, it is necessary to supply an appropriate hot water flow rate for a better indoor heating environment. If the proper hot water flow rate is not supplied to each room, heating performance may be deteriorated, such as unbalanced heating of the room, overheating, and noise caused by cavitation.

According to the present invention, when an error occurs in a valve and the valve does not operate normally with respect to a signal corresponding to an opening set value, or when a large flow rate is supplied compared to the opening set value, an unbalanced heating of a room, an overheating phenomenon, noise generation due to cavitation, etc. In order to solve the problem of deterioration of heating performance, it is to provide a method of controlling the flow rate of the radiant heating coil to determine whether the valve is in error and to follow up.

According to a first aspect of the present invention, a first valve coupled to a first radiant heating coil and a second valve coupled to a second radiant heating coil are adjusted to control the flow of fluid flowing through the first radiant heating coil and the second radiant heating coil. CLAIMS 1. A method for controlling flow rate, the method comprising: (a) inputting an opening value of a first valve; (b) transmitting a first actuation signal corresponding to the opening degree set value to the first valve; And (c) detecting an opening degree change of the first valve according to the first operation signal, and adjusting the opening degree setting value of the second valve according to the opening degree change of the first valve. do.

At this time, if the opening degree change of the first valve corresponding to the first operation signal in step (c) is less than or equal to the predetermined opening degree change reference value, the second operation signal is transmitted to the second valve, and the first valve corresponding to the first operation signal. When the change in the opening degree is detected, the radiant heating coil is measured by transmitting the second operation signal to the second valve when the temperature of the fluid flowing in the first radiant heating coil is measured and the value increases below a predetermined temperature change reference value. The flow rate of can be controlled.

According to a second aspect of the present invention, a method of controlling the flow rate of a radiant heating coil by adjusting the opening degree setting values of a plurality of valves respectively coupled to a plurality of radiant heating coils is as follows. Inputting a setpoint; (b) determining whether a ratio of the number of valves in which the opening degree setting value is input among the plurality of valves is equal to or less than a predetermined differential pressure compensation reference value; And (c) adjusting the opening degree setting value.

In this case, the opening degree setting value may be adjusted by multiplying the opening degree setting value of the valve by a predetermined proportional constant in step (c). On the other hand, it is also possible to adjust the opening degree setting value by increasing the opening degree setting value of the valve which has a different value for each of a plurality of valves, and has the largest opening degree setting value among a plurality of valves.

Other aspects, features, and advantages other than those described above will become apparent from the following drawings, claims, and detailed description of the invention.

Hereinafter, a preferred embodiment of the flow control method of the radiant heating coil according to the present invention will be described in detail with reference to the accompanying drawings, in the description with reference to the accompanying drawings, the same or corresponding components are given the same reference numerals. And duplicate description thereof will be omitted.

1 is a flow chart according to a first preferred embodiment of the present invention, Figure 2 is a conceptual diagram according to a first preferred embodiment of the present invention. Referring to FIG. 1, the opening degree change reference value (b) and the temperature change reference value (c) are specified. Referring to FIG. 2, the first valve 11, the second valve 12, and the first radiant heating coil 21 are shown. The second radiant heating coil 22, the first block 31, the second block 32 and the control unit 10 are shown.

1 and 2, step S10 is a step of inputting an opening degree setting value to a first valve. The first valve 11 is attached to the first radiant heating coil 21 to adjust the amount of fluid flowing in the radiant heating coil, and the drive unit which can change the opening degree of the valve according to the signal transmitted from the control unit 10. It may include. Opening degree means the opening degree of a valve, and the opening degree of the 1st valve 11 changes according to the opening degree setting value of the 1st valve 11.

Step S11 is a step of transmitting a first operation signal corresponding to the opening degree set value input to the first valve 11. The first valve 11 changes the opening degree by receiving the first operation signal as a step of transmitting the operation signal according to the opening degree set value input in step S10 to the first valve 11.

Step S12 is a step of detecting a change in the opening degree of the first valve 11. When the first operation signal is sent from the control unit, the first valve 11 should be operated at a corresponding opening degree. If the opening degree change is less than or equal to the predetermined opening change threshold value (b), the valve may determine that there is an error. have. The predetermined opening degree change reference value (b) is a reference value for determining whether to operate in correspondence with the opening degree setting value of the first valve, or may be a value obtained by multiplying a predetermined ratio by the opening degree setting value of the first valve, or may be any constant. For example, when the predetermined opening degree change reference value b is 0, when the opening degree change of the valve is less than or equal to the opening degree change reference value b, the valve is not operated at all and the opening degree change is not detected. In other words, if a change in opening degree is detected, it works normally.

When the change in the opening degree is not detected, the step S16 of transmitting the second operation signal to the second valve 12 may be performed. When the opening degree of the valve is changed according to the first operation signal, and the fluid required for the first radiant heating coil 21 must flow, but the necessary fluid cannot be supplied to the first radiant heating coil 21 due to an error of the first valve. The second actuation signal is transmitted to the second valve 12, which is a normal replacement valve for passing the fluid through another radiation heating coil.

At this time, the second valve 12 may mean a valve defined as a replacement valve for the first valve 11, but it is not necessarily determined, and among the valves that are normally operated when there are a plurality of radiant heating coils supplied with the fluid. You can do it with one. In addition, the second actuation signal may be the same as the first actuation signal, but is not necessarily the same as the first actuation signal, and may be changed by changing the opening degree setting value so that a fluid corresponding to the amount of fluid passing through the first valve 11 flows. The operation signal can be transmitted.

On the other hand, if the change in the opening degree is greater than the predetermined opening change reference value (b), it is possible to perform the step (S14) of measuring the temperature change. Although there is no error in the first valve 11, when the supply of fluid is artificially cut off, the temperature of the first radiant heating coil 21 does not increase, so the temperature change is measured and the flow rate of the fluid is controlled accordingly. . . Referring to FIG. 2, there is a first block 31, which is attached to the supply header side of the radiant heating coil to manually control the flow of the fluid.

The temperature change is compared with a predetermined temperature change reference value (c) (S15). At this time, the predetermined temperature change reference value (c) is a reference value for the degree of temperature change which is a standard for determining that normal fluid is not supplied to the radiant heating coil. The predetermined temperature change reference value c may be determined in proportion to the temperature change in normal operation or may be any constant. For example, if the predetermined temperature change reference value c is 0, it is determined that normal operation is not performed when the temperature does not increase.

When the temperature change is less than or equal to the predetermined temperature change reference value (c), the first block 31 is locked, and it is judged that the supply of fluid is artificially shut off, and the excess flow rate is the second radiation heating coil which is an alternative radiation heating coil. Since it has to pass through (22), the step (S16) of transmitting the second operating signal to the second valve 21 is performed.

In the case where the temperature change in step S15 exceeds the predetermined temperature change reference value C, the first valve 11 is normal and the fluid is normally supplied to the first radiant heating coil 21 so that there is no excess fluid. The valve operates normally with no errors. After performing step S16, excess fluid is flowed through the second radiant heating coil 22 to solve problems such as cavitation caused by the excess fluid. Can be.

A second embodiment of the flow rate control method of the radiant heating coil according to the present invention will be described in detail with reference to FIG. 3 is a flowchart according to a second embodiment of the present invention. Referring to FIG. 3, a differential pressure compensation reference value (a) is specified.

When there are a plurality of radiant heating coils, when the ratio of the number of radiant heating coils supplied with the fluid to the total number of coils is less than or equal to the predetermined differential pressure compensation standard value (a), when the fluid is supplied to the radiant heating coils, it is too large compared to the opening degree setting value. Since the flow rate is supplied, there is a fear of cavitation. Cavitation (cavitation) is a phenomenon that bubbles due to the pressure difference due to the pressure difference collapses the bubble can first damage the valve, radiant heating coil, etc., there is a problem that noise occurs.

In order to prevent cavitation, it is necessary to adjust the opening degree setting so that excess flow can flow. This adjustment step is referred to as a differential pressure compensation step, and the opening degree setting value of the valve can be adjusted by performing steps S20 to S24 of FIG. 3.

Step S20 is a step of inputting an opening degree setting value of the valve. Since the number of radiant heating coils is plural, the opening degree setting value is input to the valve of the radiant heating coil to be heated. Inputting the opening degree setting value is to supply a fluid for heating by opening the opening degree of the valve, and the opening degree setting value has a positive value.

Step S21 is a step of determining whether the opening degree setting value with respect to the total number of valves exceeds the predetermined differential pressure compensation reference value a by comparing the ratio of the input valve number with the predetermined differential pressure compensation reference value a. That is, the valve is opened to determine whether the coil supplied with the fluid to be heated exceeds the predetermined differential pressure compensation reference value (a). The predetermined differential pressure compensation reference value (a) is a value that is compared with the ratio of the input valve to the opening degree setting value for all the valves. When the heating is applied only to the radiant heating coil below the predetermined differential pressure compensation reference value (a), fluid is not supplied smoothly. No, there is a need to improve it.

Step S22 is a step of adjusting the opening degree setting value when the ratio of the valve number to which the opening degree setting value is input to the total number of valves is equal to or less than the predetermined differential pressure compensation reference value a.

In this case, the opening degree setting value may be adjusted by multiplying the opening degree setting value by a predetermined proportional constant m. The predetermined proportional constant m is greater than 1 since it is multiplied to make the opening degree set value of the valve larger so that more fluid can pass therethrough.

In addition, the opening degree setting value of the valve can be adjusted to supply an extra flow rate to the radiant heating coil which needs the most heat amount among the valves in which the opening degree setting value is input. That is, the flow rate of the radiant heating coil is controlled by adjusting the opening degree set value of the radiant heating coil having the largest opening degree set value.

Step S24 is a step of transmitting the operation signal to the valve corresponding to the opening degree setting value. At this time, when the ratio of the valve to which the opening degree set value is input is equal to or less than the predetermined differential pressure compensation reference value (a), the operation signal corresponding to the adjusted opening degree setting value is transmitted. Otherwise, the operation signal corresponding to the opening degree setting value input in step S20 is transmitted. To transmit.

The second embodiment of the flow rate control method of the radiant heating coil according to the present invention will be described in detail by substituting specific numerals. In this case, for convenience of description, refer to FIG. 4. 4 is a conceptual diagram of a flow control method of a radiant heating coil according to a second preferred embodiment of the present invention. 4 shows valves 41, 42, 43, 44, radiant heating coils 51, 52, 53, 54 and control unit 40.

In the system composed of four valves 41, 42, 43, 44 and radiant heating coils 51, 52, 53, 54 as in FIG. 4, the four valves have a valve opening value of 60%. ), The valve 42 having an opening degree setting value of 30% and the valves 43 and 44 without inputting the opening degree setting value, the valve 41 having an opening degree setting value of 60% and the opening degree setting value of 30% Only the valve 42 which has it is a valve in which the opening degree set value was input. That is, the number of open valves is two out of four.

If the predetermined differential pressure compensation reference value (a) is 50%, since only two of the four valves have the opening degree setting value input, the ratio of the number of valves with the opening degree setting value inputted to the total number of valves being 50% or less must be passed through the differential pressure compensation step. do.

In the case of changing the opening degree setting value by multiplying the opening degree setting value of the valve by a predetermined proportional constant m, for example, when the predetermined proportionality constant b is 130%, the opening degree of 60% The opening degree set value of the valve 41 having the set value can be adjusted to 78%, and the opening degree set value of the valve 42 having the 30 degree opening degree set value can be adjusted to 39%.

When the opening degree setting value is changed by adjusting the opening degree setting value of the valve having the largest value among the opening degree setting values to a predetermined value, the opening degree setting value of the valve 41 having the opening degree setting value of 60% is the largest. The opening degree setting value of the valve 41 having the opening degree setting value of% can be adjusted to 60% or more, for example, to 100% which is the maximum opening degree.

As such, the partial heating causes the fluid not to go to the place where it needs to be heated, but back to the heat source, which causes unnecessary energy consumption, so that the fluid flows to the radiant heating coil through differential pressure compensation. In this case, it is possible to solve the problem of rising heating energy and deterioration of boiler durability due to frequent on / off of the boiler.

5 is a flowchart illustrating a flow control method of a radiant heating coil according to a third exemplary embodiment of the present invention. The two embodiments of the flow rate control method of the radiant heating coil described above may be simultaneously implemented. 3, the differential pressure compensation reference value (a), the opening degree change reference value (b) and the temperature change reference value (c) are specified. First, it is also possible to control the valve by adjusting the opening degree setting value by determining whether there is an error of the valve through the second embodiment, that is, after the differential pressure compensation step.

Referring to FIG. 5, step S30 is a step of inputting an opening degree set value of the first valve, and step 31 is a step of determining whether the ratio of the number of valves in which the opening degree setting value is input to the total number of valves exceeds a predetermined differential pressure compensation reference value a. When the predetermined differential pressure compensation reference value (a) does not exceed, the step (step S32) of adjusting the opening degree set value of the valve is performed.

The above is the same as in the second embodiment, and controls the valve of the radiant heating coil according to the first embodiment according to the adjusted opening degree setting value. The first operation signal corresponding to the opening degree set value determined by performing steps S30 to S32 is transmitted to the first valve (step S33).

Step S34 is a step of detecting a change in the opening degree of the first valve. When the first operation signal is sent from the control unit, the first valve should be operated at a corresponding opening degree, but if there is no change in the opening degree, the valve may determine that there is an error.

If the change in the opening degree is not detected, the step S38 of transmitting the second operation signal to the second valve may be performed.

In this case, the second valve may mean a valve that is defined as an alternative valve to the first valve, but is not necessarily determined, and when there are a plurality of first radiant heating coils to which fluid is supplied, one of the first valves normally operates. Can be. In addition, the second operation signal is not necessarily the same as the first operation signal, it is possible to transmit a new operation signal by changing the opening degree set value so that the fluid corresponding to the amount of fluid passing through the first valve.

When the change in the opening degree is detected, step S36 is performed. Even if there is no error in the first valve, if the temperature change does not increase as a result of the determination in step S37, the first block is locked, and an extra flow rate must be passed through the second radiation heating coil, which is an alternative radiation heating coil. Therefore, the step S38 of transmitting the second operation signal to the second valve is performed.

If the temperature change increases in step S37, the first valve is normal, and since the fluid is normally supplied to the first radiant heating coil, there is no error in the valve in the absence of excess fluid, and after the step S38 is performed, By passing the excess fluid through the second radiation heating coil can solve the problem such as cavitation (excessive cavitation) by the excess fluid.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

According to a preferred embodiment of the present invention as described above, when a large amount of fluid is supplied to the radiant heating coil as compared to the valve opening degree, an unbalanced overheating phenomenon of each room heating is caused by passing an extra fluid that does not pass by adjusting the opening degree setting value. It is possible to prevent deterioration of heating performance such as noise generated by cavitation.

Claims (6)

A method of controlling a flow rate of a fluid by adjusting an opening degree of a first valve coupled to a first radiant heating coil and a second valve coupled to a second radiant heating coil, (a) inputting an opening degree setting value of the first valve; (b) transmitting a first actuation signal corresponding to the opening degree setting value to the first valve; And (c) detecting the change in the opening degree of the first valve according to the first operation signal and adjusting the opening degree set value of the second valve according to the change in the opening degree of the first valve. Way. The method of claim 1, Step (c) is, And transmitting a second operation signal to the second valve when the opening degree change of the first valve is equal to or less than a predetermined opening degree change threshold value. The method of claim 1, Step (c) is, When the opening degree of the first valve is sensed, the temperature of the fluid flowing in the first radiant heating coil is measured, and when the value increases below a predetermined temperature change reference value, a second operation signal is transmitted to the second valve. Flow rate control method of the radiant heating coil comprising the step of. As a method of controlling the flow rate of the radiant heating coil by adjusting the opening degree of the plurality of valves respectively coupled to the radiant heating coil, (a) inputting an opening degree setting value to each of some of the plurality of valves; (b) determining whether a ratio of the number of valves in which the opening degree setting value is input among the plurality of valves is equal to or less than a predetermined differential pressure compensation reference value; And (c) controlling the flow rate of the radiant heating coil according to the determination result of the step (b). The method of claim 4, wherein Step (c) is, And regulating the opening degree setting value by multiplying the opening degree setting value by a predetermined proportional constant. The method of claim 4, wherein Step (c) is, And the opening degree setting value has a different value for each of the plurality of valves, and increasing the opening degree setting value of the valve having the largest opening degree setting value among the plurality of valves. .

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