KR100986091B1 - Apparatus for automatic control of constant flow - Google Patents

Abstract

PURPOSE: An automatic control apparatus of constant flow is provided to possessively perform interior temperature control through a heat exchanger by automatically controlling the constant-rate flow corresponding to indoor temperature. CONSTITUTION: An automatic control apparatus of constant flow comprises a body(210), a chamber(220), a diaphragm(230), a moving body(240), an actuator(250), a strainer(260), and a temperature control unit(270). A sheet is formed between an inlet(211) and an outlet(212). A hydraulic path is formed on the chamber. The diaphragm is deformed by the pressure difference between the inlet fluid pressure and the sheet fluid pressure. The moving body adjusts the cross section, connected from the sheet to the outlet, by the pressure difference. The actuator comprises a drive body(251) and a moving rod(252).

Description

Compound constant flow automatic control device {APPARATUS FOR AUTOMATIC CONTROL OF CONSTANT FLOW}

The present invention relates to a hybrid constant flow automatic control device.

The heating system used in multi-family houses or large buildings uses individual heating to heat the fluid by means of a heat source such as a boiler installed independently in each household, and heats the fluid by an external heating source installed outside the household. After heating, the heated fluid is supplied to each household, and it is divided into the group heating.The group heating is again divided into the central heating using a heat source such as a central boiler in a multi-family complex or a large building, and the outside of the multi-family complex. Distinguished by district heating using the same heat source as the local power plant.

In general, such a heating system uses water as a heating fluid. Particularly, in a group heating system, a supply pipe branched into each generation from a central supply pipe supplied with hot water heated from a heat source is provided with a hot water supply header, a plurality of hot water pipes, and hot water return. Each generation is heated by a household hot water distributor system including a header and a return pipe, and afterwards, the return pipes of each generation are concentrated back to the central return pipe and have a circulation system that is returned to the heat source.

1 is an explanatory view showing a conventional flow control device for a heat exchanger.

As shown in Figure 1, the feed water supplied from the heat source (boiler or freezer) through the supply pipe (1) is introduced into the heat exchanger 100 to end the heat exchange with the ambient air is returned through the return pipe (2), The return pipe (2) is provided with a strainer (3) for filtering the foreign matter contained in the fluid.

In addition, a separate shut-off valve (4) for controlling the flow of fluid on the return pipe (2) is provided separately from the strainer (3), the shut-off valve (4) is on (on) or off (off) function Because only this is done, the fluid flows entirely or is blocked 100%.

In addition, on the return pipe (2), a manual flow control valve (5) is provided separately from the shutoff valve (4), the manual flow control valve (5) is the flow rate of the fluid flowing through the return pipe (2) By limiting the flow rate, the user can limit the required flow rate in each heat exchanger by using a tool such as a driver if necessary within the maximum flow rate range.

In addition, a differential pressure valve 6 is installed between the supply pipe 1 and the return pipe 2 to maintain the pressure constant when a pressure change of the fluid occurs.

As described above, in order to control the flow rate in the related art, a strainer, a shutoff valve, a manual constant flow valve, and a differential pressure valve are required, respectively, and all of them need to be installed in the return pipe.

In addition, in the related art, since the user controls the manual flow valve as necessary, the flow rate is limited, and thus, the use is very cumbersome and there is a problem in that the temperature cannot be accurately controlled by the flow rate.

The present invention is to solve the problems described above, the object is to integrate the functions of the conventional strainer, shut-off valve, manual constant flow valve, differential pressure valve in one component to reduce the cost and further simplify the installation work It is.

In addition, the present invention is to control the amount of heat generated by the heat exchanger more actively by automatically adjusting the flow rate corresponding to the room temperature.

In order to solve the above-mentioned problems,

A body having a flow path communicating with the inlet and the outlet therein and having a sheet formed between the inlet and the outlet; A chamber in which a hydraulic passage is formed so that the inlet side hydraulic pressure and the seat side hydraulic pressure respectively act on an inner side of the body; A diaphragm installed to separate the chamber so that the inlet side hydraulic pressure and the seat side hydraulic pressure are acted on both sides thereof and deformed by the pressure difference; A movable body coupled to one side of the diaphragm and elastically installed to adjust a cross-sectional area leading from the seat to the outlet by a pressure difference in the chamber; At the other side of the body, the actuator for controlling the cross-sectional area from the inlet to the seat by the electrical signal; A strainer installed on a flow path of the body to filter foreign matter contained in the fluid passing through the body; It provides a combined constant flow rate automatic control device including a temperature control unit for controlling the actuator by comparing the indoor temperature and the desired temperature setting function and the indoor temperature measurement function and the desired temperature setting function.

Here, the actuator, the drive body electrically connected to the temperature control unit for converting the electrical signal of the temperature control unit into the kinetic force; And a moving rod extending from the driving body and inserted into the body, the moving rod being moved to adjust a cross-sectional area from the inlet side toward the seat.

The drive body, the temperature sensor for measuring the ambient temperature; A display unit which displays an indoor temperature and a desired temperature as necessary; A control unit provided with a basic control unit for setting a desired temperature, and a selection control unit for forcibly controlling the moving rod irrespective of the signal of the temperature control unit by selecting a priority between the temperature control unit and the actuator; Characterized in that the included.

The movable body, the head portion coupled to the diaphragm; A stem portion extending from the head portion toward the seat to adjust a cross-sectional area leading from the seat to the outlet according to the deformation of the diaphragm; And an elastic member installed between the movable body and the chamber so that the movable body is restored when both pressures are the same based on the diaphragm.

According to the present invention, since the flow rate is automatically adjusted according to the room temperature, the room temperature control through the heat exchanger is more actively performed, and when the flow rate is adjusted, it can be opened in the range of 0 to 100%, replacing the conventional shutoff valve function. And the built-in strainer has the advantage of filtering foreign matter contained in the fluid.

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

Figure 2 is an explanatory view for explaining the configuration and operation of the hybrid constant flow automatic control apparatus according to the present invention, Figure 3 is a front view showing another embodiment of the drive body according to the present invention, Figure 4 is Sectional drawing which shows the internal structure of the drive body used.

First, as shown in FIG. 2, the present invention includes a body 210, a chamber 220, a diaphragm 230, a movable body 240, an actuator 250, a strainer 260, and a temperature controller 270. It relates to a composite constant flow automatic control device comprising a.

The present invention may be installed on a supply pipe through which a fluid is supplied from a heat exchanger 100, such as a fan coil unit, for example. It can also be installed in the appropriate, according to the needs of the implement may be appropriately adopted.

An inlet 211 is formed at one side of the body 210 to receive the fluid to be returned, and an outlet 212 is formed at the other side thereof to the fluid. The body 210 has the inlet 211. A flow path through which the outlet 212 communicates is provided therein.

In addition, the body 210 has a sheet 213 is formed between the inlet 211 and the outlet 212 to reduce the cross-sectional area of the flow path and the fluid introduced into the body 210 through the inlet 211 is Passed through the sheet 213 is discharged to the outside through the outlet (212).

In addition, the chamber 220 is a predetermined space formed inside one side of the body 210, the hydraulic passage so that the hydraulic pressure of the inlet 211 side and the sheet 213 side hydraulic pressure acts on the chamber 220, respectively. 221, 222 are formed.

Referring to FIG. 2, the chamber 220 has a first hydraulic passage 221 communicating with the inlet 211 side so that the hydraulic pressure of the inlet 211 side is formed, and the hydraulic pressure of the seat 213 side is formed. A second hydraulic passage 222 is formed in communication with the seat 213 side.

Accordingly, the chamber 220 includes a first hydraulic chamber 223 communicating with the first hydraulic passage 221 and a second hydraulic chamber 224 communicating with the second hydraulic passage 222. Is separated by).

The diaphragm 230 is installed in the chamber 220 so that the first hydraulic chamber 223 and the second hydraulic chamber 224 are separated from each other, and both sides of the diaphragm 230 face the inlet 211. When the hydraulic pressure and the hydraulic pressure on the seat 213 side act, respectively, they are deformed by the pressure difference.

The movable body 240 is coupled to one side of the diaphragm 230 is elastically installed to adjust the cross-sectional area of the flow path from the seat 213 toward the outlet 212 by the pressure difference in the chamber 220 When the diaphragm 230 is deformed due to the pressure difference of the chamber 220, the diaphragm 230 receives the deformation force to approach the sheet 213.

Here, the movable body 240 includes a head portion 241, a stem portion 242, and an elastic member 243, wherein the head portion 241 is coupled to the diaphragm 230. to be.

In addition, the stem portion 242 extends from the head portion 241 toward the seat 213 and passes through the cross-sectional area of the flow path passing from the seat 213 toward the outlet 212 according to the deformation of the diaphragm 230. It is a part to regulate.

Therefore, the stem portion 242 is moved in accordance with the deformation of the diaphragm 230 while increasing or decreasing the cross-sectional area from the seat 213 toward the outlet 212 to lower or lower the hydraulic pressure at the seat 213 side. Raised.

The second hydraulic passage 222 communicating with the second hydraulic chamber 224 may be formed in the body 210 so as to communicate with the seat 213 side. However, in the present invention, the second hydraulic passage may be formed. 222 may be formed inside the stem 242.

Accordingly, the second hydraulic chamber 224 communicates with the seat 213 through the second hydraulic passage 222 formed in the stem 242.

In addition, when the first hydraulic chamber 223 and the second hydraulic chamber 224 are in the same pressure state, the movable body 240 should be restored to an initial position as shown in FIG. 243 is installed between the movable body 240 and the chamber 220.

When the fluid of a certain hydraulic pressure enters the body 210 and a high pressure fluid is higher than this at any moment, the hydraulic pressure of the inlet 211 becomes higher than the hydraulic pressure of the seat 213, and thus the inlet 211. The pressure of the first hydraulic chamber 223 in communication with the () is higher than the pressure of the second hydraulic chamber 224 in communication with the seat 213 bar pressure due to this pressure difference The diaphragm 230 is bent toward the second hydraulic chamber 224 by acting toward the second hydraulic chamber 224, and the movable body 240 is caused by the deformation of the diaphragm 230. The end of the movable body 240 is pushed toward the seat 213 to reduce the cross-sectional area leading from the seat 213 toward the outlet 212.

When the cross-sectional area leading from the seat 213 toward the outlet 212 is reduced, the oil pressure in the seat 213 gradually rises and finally reaches a state equal to the oil pressure of the inlet 211 side. When the hydraulic pressure of the seat 213 side becomes the same, the pressure of the first hydraulic chamber 223 and the second hydraulic chamber 224 reaches an equilibrium state, and the movable body 240 is restored to its original position by the elastic force.

As such, the chamber 220, the diaphragm 230, and the movable body 240 are configured such that the hydraulic pressure at the inlet 211 side and the seat 213 side can always be maintained the same. The reason for maintaining the same is that the pressure at the inlet 211 side and the sheet 213 side should be the same so that the desired flow rate can be precisely controlled by adjusting the cross-sectional area of the flow rate from the inlet 211 side to the sheet 213 side. Because.

On the other hand, when the hydraulic pressure of the inlet 211 side and the seat 213 side is maintained in the same state by the above configuration, the flow rate passing through the seat 213 by the actuator 250 is adjusted.

The actuator 250 is installed on the other side of the body 210, and adjusts the actual flow rate by adjusting the cross-sectional area from the inlet 211 toward the seat 213 by the electrical signal provided from the temperature control unit 270 In this configuration, the actuator 250 can control the flow rate by substantially adjusting the cross-sectional area passing from the inlet 211 side to the seat 213 side.

The actuator 250 includes a driving body 251 and a moving rod 252 largely, the driving body 251 is electrically connected to the temperature control unit 270 to be described later the temperature control unit 270 Receiving an electrical signal from) converts it to kinetic force.

The driving force of the driving body 251 is transmitted to the moving rod 252 and the cross-sectional area passing from the inlet 211 side toward the seat 213 is adjusted by the length change according to the movement of the moving rod 252. .

Meanwhile, as shown in FIG. 2, it is preferable that a strainer 260 is installed on the flow path of the body 210 so as to filter out foreign substances contained in the fluid passing through the body 210.

Although the strainer 260 is shown in the present invention as installed on the inlet 211 side, it is not necessarily limited thereto, and it may be anywhere if it is installed on the flow path inside the body 210.

In addition, the strainer 260 may be integrally installed inside the body 210, but is detachably installed through a separate pipe member 261 and the coupling 262 to facilitate the exchange of the strainer 260. It is good.

In addition, the temperature control unit 270 serves as both the indoor temperature measurement function and the desired temperature setting function, and is usually installed at one side of the room to control the actuator 250 by comparing the indoor temperature with the desired temperature by itself. .

For example, when the room temperature is 18 ° C. and the desired temperature is 24 ° C., the temperature control unit 270 increases the flow rate by increasing the cross sectional area from the inlet 211 toward the seat 213 for heating. Increase the calorific value at 100.

In this case, the driving body 251 may be implemented to control the moving rod 252 by receiving an electrical signal from the temperature control unit 270 as in the basic embodiment of the present invention shown in FIG.

However, regardless of the signal of the temperature controller 270, the user needs to forcibly control the moving rod 252, or set the priority between the temperature controller 270 or the actuator 250 The driving body 251 may include a temperature sensor 251a, a display unit 251b, and an adjusting unit 251c to control the moving rod 252.

Therefore, according to another embodiment of the driving body 251 according to the present invention as shown in Figure 3, the driving body 251 is provided with a temperature sensor 251a for measuring the temperature of the ambient air, the driving body One side of 251 is provided with a display unit 251b for displaying the room temperature and the desired temperature as needed, the basic control unit for setting the desired temperature, as well as the temperature control unit 270 or actuator 250 The control unit 251c is provided with a selection control unit for forcibly controlling the moving rod 252 irrespective of the temperature control unit 270 signal by selecting a priority between the and the signal.

Here, the basic control unit and the selection control unit of the adjustment unit 251c may be made of any one of a button form, a dial form, or a touch screen form displayed on the display unit 251b. Although the unit 251c is implemented as being implemented in the form of a button, it is not necessarily limited thereto and may be in the form of a dial or a touch screen.

That is, according to another embodiment of the present invention, the drive main body 251 already includes the function of the temperature control unit 270, and the drive main body 251 is measured by the temperature sensor 251a. The moving rod 252 may be controlled by comparing a temperature with a desired temperature set through the control unit 251c.

Therefore, when the temperature controller 270 is separately provided as shown in FIG. 2, to control the moving rod 252 by the temperature controller signal, selecting the temperature controller from the control unit 251 c of the driving body. If the selection control unit is pressed and the moving rod 252 is controlled by the actuator 250 signal, the selection control unit for selecting the actuator in the control unit 251c may be pressed.

If the temperature control unit 270 is not provided, the moving rod 252 may be controlled only by the driving body 251. In this case, the selection control unit should be selected as an actuator.

Here, the drive main body 251 has a structure as shown in Figure 4, the temperature control unit 270 is electrically connected to the drive motor 253 of the drive main body 251, the drive motor 253 ), The drive motor 253 applies a rotational force to the drive gear 255 through the reduction gear 254.

Although not shown in FIG. 4, the drive gear 255 is connected to the moving rod 252 so as to be power-transmitted to provide an external force for the linear movement of the moving rod 252.

In this case, since the control unit can know the flow rate passing from the inlet 211 side to the seat 213 side only when the control unit receives the information on the position of the linear movement rod 252, the drive gear 255 The power is connected to the sensor gear 257 through the connecting gear 253.

Accordingly, when the driving gear 255 is rotated, the sensor gear 257 is rotated in conjunction with the sensor gear 257. The sensor gear 257 has a variable resistor 258, which is generally known, and the variable resistor 258. Since the output value of is input to the controller, the controller can receive the output value of the variable resistor 258 in real time to know the amount of rotation of the drive gear 255, that is, the position of the moving rod 252. .

The drive gear 255 may be rotated one or more times, but since the sensor gear 257 must be rotated in contact with the variable resistor 258, the number of revolutions is limited to less than one time. It is preferable that an appropriate gear ratio is set between the drive gear 255 and the sensor gear 257. For reference, in the present invention, the rotation angle of the sensor gear 257 is limited to 270 degrees or less, and a variable resistor 258 is installed within the rotation angle range, and the control unit moves distance and seat of the moving rod 252. Various parameters, such as the diameter of 213, are input and the flow rate can be estimated if the moving distance of the moving rod 252 is known.

As such, the movable rod 252 extends from the driving body 251 and receives a force from the driving body 251 to enter the sheet 213 toward the seat 213 while being inserted into the body 210. The flow rate is controlled as the moving rod 252 adjusts the cross-sectional area of the sheet 213.

At this time, the outer diameter of the movable rod 252 is preferably set to a size corresponding to the inner diameter of the seat 213, the fluid can flow at all when the movable rod 252 is completely fitted to the seat 213 The flow rate is " 0 ".

For example, when the room temperature measured by the temperature controller 270 reaches 24 ° C. equal to the desired temperature, the driving body 251 may be moved because the moving body 252 does not need to be heated anymore. The sheet 213 is moved to fit completely into the sheet 213 so that the flow rate of the sheet 213 is "0". As such, when the passage flow rate is "0", the flow rate supplied to the heat exchanger 100 is cut off and the heating is stopped.

 In addition, the initial set flow rate of the hybrid constant flow rate automatic control device according to the present invention (the static flow rate in the state that the moving rod 252 is not controlled by the temperature control unit 270) is a heat exchanger (100) It is preferable to set to the optimum flow rate value required for this, which is set to the initial position of the moving rod 252 so that the fixed flow rate corresponding to the optimum flow rate value of the heat exchanger 100 and the temperature control unit 270 at this position In accordance with the signal of), the moving rod 252 may be controlled so that the flow rate is controlled.

That is, when the driving body 251 does not receive an electrical signal from the temperature controller 270, the driving body 251 causes the moving rod 252 to be in the set initial position. What is necessary is just to set the position of the said moving rod so that the flow volume of the sheet 213 of the heat exchanger may be an optimal flow rate value in the heat exchanger.

As mentioned above, although this invention was demonstrated in detail using the preferable Example, the scope of the present invention is not limited to the specific Example described, and the person of ordinary skill in the art is not limited within the scope of this invention. Substitution and modification of the components are possible, which also belongs to the rights of the present invention.

1 is an explanatory view showing a conventional flow control device for a heat exchanger;

2 is an explanatory diagram for explaining the configuration and operation of the hybrid constant flow automatic control device according to the present invention;

3 is a front view showing another embodiment of a driving body according to the present invention;

Figure 4 is a cross-sectional view showing the internal structure of the drive body used in the present invention.

<Description of the symbols for the main parts of the drawings>

210: body 211: entrance

212: exit 213: sheet

220: chamber 221: first hydraulic passage

222: the second hydraulic passage 223: the first hydraulic chamber

224: second hydraulic chamber 230: diaphragm

240: movable body 241: head portion

242: stem portion 243: elastic member

250: actuator 251: driving body

252: Moving Rod 260: Strainer

270 temperature control unit

Claims (4)

A body 210 having a flow path in which the inlet 211 and the outlet 212 communicate with each other, and a seat 213 formed between the inlet 211 and the outlet 212; A chamber 220 in which a hydraulic passage is formed on one side of the body 210 so that the hydraulic pressure of the inlet 211 side and the hydraulic pressure of the seat 213 side are respectively acted on; The diaphragm 230 is installed so that the chamber 220 is separated and the hydraulic pressure of the inlet 211 side and the sheet 213 side hydraulic act on both sides thereof, the diaphragm 230 is deformed by the pressure difference; A movable body 240 coupled to one side of the diaphragm 230 and elastically installed to adjust a cross-sectional area of the sheet 213 toward the outlet 212 by a pressure difference in the chamber 220; A driving body 251 that receives an electrical signal and converts it into a kinetic force, and extends from the driving body 251 is inserted into the body 210 and adjusts the cross-sectional area leading from the inlet 211 toward the seat 213. An actuator 250 having a moving rod 252 that is moved to make; A strainer 260 installed on a flow path of the body 210 so that foreign matter contained in the fluid passing through the body 210 is filtered; It includes; a temperature control unit 270, which combines the indoor temperature measurement function and the desired temperature setting function, and controls the actuator 250 by comparing the indoor temperature and the desired temperature. The drive body 251, A temperature sensor 251a for measuring the ambient temperature; A display unit 251 b for displaying an indoor temperature and a desired temperature as necessary; Between the basic control unit for setting the desired temperature, and the temperature control unit 270 or the actuator 250 to forcibly control the moving rod 252 irrespective of the signal of the temperature control unit 270 And a control unit (251c) having a selection control unit for selecting a priority. delete delete The method according to claim 1, The moving body 240, A head portion 241 coupled to the diaphragm 230; A stem portion 242 extending from the head portion 241 toward the seat 213 to adjust a cross-sectional area from the seat 213 toward the outlet 212 according to the deformation of the diaphragm 230; And an elastic member 243 disposed between the movable body 240 and the chamber 220 so that the movable body 240 is restored when the pressures on both sides of the diaphragm 230 are equal to each other. Type constant flow automatic control device.

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