KR101774570B1 - Flow control method for cold and hot water in cooling and heating system with fan coil unit - Google Patents

Flow control method for cold and hot water in cooling and heating system with fan coil unit Download PDF

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Publication number
KR101774570B1
KR101774570B1 KR1020150190218A KR20150190218A KR101774570B1 KR 101774570 B1 KR101774570 B1 KR 101774570B1 KR 1020150190218 A KR1020150190218 A KR 1020150190218A KR 20150190218 A KR20150190218 A KR 20150190218A KR 101774570 B1 KR101774570 B1 KR 101774570B1
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South Korea
Prior art keywords
temperature
water
cooling
cold
hot water
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KR1020150190218A
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Korean (ko)
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KR20170079532A (en
Inventor
임형선
임송배
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(주)에이피
(주)드림이엔지
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F25B41/046—
    • F25B41/06—
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/029—Control issues
    • F25B2313/0292—Control issues related to reversing valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/029—Control issues
    • F25B2313/0293—Control issues related to the indoor fan, e.g. controlling speed
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2700/00—Sensing or detecting of parameters; Sensors therefor
    • F25B2700/21—Temperatures

Abstract

(A) measuring a water supply temperature supplied to a cooling / heating system provided with a fan coil unit for performing a cooling operation and a heating pipe installed at an indoor floor, a temperature of a water discharged from the heating / cooling system, and a room temperature; (b) determining whether the room temperature has reached the target temperature; (c) shutting off the supply valve for controlling whether the cold or hot water is supplied to the fan coil unit or the heating pipe when the room temperature reaches the target temperature; (d) opening the supply valve if the room temperature has not reached the target temperature; (e) when the supply valve is opened, determining that the temperature difference between the water supply temperature and the water return temperature is reduced to be included in the set range; And (f) decreasing the opening ratio of the supply valve when the temperature difference between the water supply temperature and the water return temperature is reduced so as to be included in the setting range.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for controlling the flow rate of hot and cold water in a cooling / heating system having a fan coil unit,

The present invention relates to a method for controlling the flow rate of cold and hot water in a cooling and heating system having a fan coil unit and more particularly to a method for controlling the flow rate of cold and hot water in a cooling / The present invention relates to a method for controlling the flow rate of cold and hot water in an air-conditioning system having a fan coil unit that adjusts a supply amount of cold water or hot water and can calculate an air-conditioning cost or a heating cost based on the supply amount of cold water or hot water.

Apartments, residential complexes, etc. In the existing apartment housing complex, the district heating system is operated by constructing a cogeneration power plant within the complex, and an air conditioner is installed separately in each household or space for cooling.

Because the district heating system does not provide cold water or heat source for cooling, it is necessary to install air conditioner separately and install the outdoor unit accordingly.

In this case, there is a space for installing the air conditioner and the outdoor unit, and the cost for purchasing the equipment is high, and it is inconvenient to move them together when moving.

Also, since the outdoor unit is usually installed on the side of the window, hot heat can be returned to the inside when the window is opened.

Individual heating requires individual boilers and air conditioners. In this case, the boiler needs to be installed more than the district heating system.

In order to solve the above problems, a geothermal heating and cooling system has been developed. In the geothermal heating and cooling system according to the related art, a ground heat exchanger and a heat pump for supplying a heat source from an underground heat exchanger to each household of a multi- A cold and hot water supply header for supplying a heat source from the heater pump to each household, a cooling switching valve and a heating switching valve for switching heating and cooling modes, and a heat source heat-exchanged in the heat pump from a central machine room And a cold and hot water return header for exchanging cold and hot water from each generation by heat exchange with the cooling / heating pipe or fan coil installed on the ceiling of each household.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 10-2010-0128520 (entitled " Centralized Geothermal Heating and Cooling System of Apartment House "

The cooling / heating system according to the related art determines whether the room temperature reaches the target temperature during the cooling operation or the heating operation, and when the room temperature approaches the target temperature, the output of the fan of the fan coil unit is decreased and controlled, When the temperature reaches the target temperature, the driving of the blowing fan is interrupted and the supply of cold water or hot water is cut off. Therefore, the variation range of the room temperature is increased more than necessary and the cooling and heating system is driven Or the flow rate is not maintained.

In the cooling / heating system according to the related art, since the cooling ratio or the heating ratio is calculated according to the supply amount of the cold water or the hot water, the driving degree of the blowing fan is gradually decreased to circulate the room air, When the room temperature reaches the target temperature, the logarithmic mean temperature value decreases, and the difference between the supply temperature and the return temperature decreases. Therefore, the use of energy is reduced, but the problem is not reflected in the cooling cost or the heating cost have.

Therefore, there is a need for improvement.

The present invention adjusts the supply amount of cold water or hot water based on the temperature of cold water or hot water supplied to the room and the temperature difference between cold water or hot water discharged from the room, And a fan coil unit capable of calculating a cooling / heating flow rate of the cooling / heating system.

(A) measuring a water supply temperature supplied to a cooling / heating system provided with a fan coil unit for performing a cooling operation and a heating pipe installed at an indoor floor, a temperature of a water discharged from the heating / cooling system, and a room temperature; (b) determining whether the room temperature has reached the target temperature; (c) shutting off the supply valve for controlling whether the cold or hot water is supplied to the fan coil unit or the heating pipe when the room temperature reaches the target temperature; (d) opening the supply valve if the room temperature has not reached the target temperature; (e) when the supply valve is opened, determining that the temperature difference between the water supply temperature and the water return temperature is reduced to be included in the set range; And (f) decreasing the opening ratio of the supply valve when the temperature difference between the water supply temperature and the water return temperature is reduced so as to be included in the setting range.

(G) increasing the opening amount of the supply valve if the temperature difference between the water supply temperature and the water return temperature is not included in the setting range in the step (e), wherein the step ) Step is performed, the step (e) is performed.

Further, the step (b) may be performed after the step (c) of the present invention is performed.

Further, the present invention is characterized in that a cooling rate or a heating ratio is calculated by sensing a flow rate of cold / hot water supplied to the fan coil unit or the heating pipe.

The present invention also relates to a cooling system for a cooling / heating system, comprising (a) a water supply temperature supplied to a cooling / heating system provided with a fan coil unit for performing a cooling operation or a heating operation and a heating pipe provided at an indoor floor, ; (b) determining whether the room temperature is controlled to exceed the target temperature; (c) shutting off the water supply valve for controlling whether the cold water or hot water is supplied to the fan coil unit or the heating pipe when the room temperature is controlled to exceed the target temperature, and stopping the blowing fan of the fan coil unit; (d) determining whether the room temperature and the target temperature are identical if the room temperature is not controlled beyond the target temperature; (e) when the room temperature and the target temperature are the same, the output of the blowing fan is driven in the "weak" mode, and the opening rate of the water supply valve proceeds in the "lower"mode; (f) determining whether the temperature difference between the water supply temperature and the water return temperature is within the set range if the room temperature and the target temperature are not the same in step (d); (g) when the temperature difference between the water supply temperature and the water return temperature is within the set range, the output of the blowing fan is driven in the "medium" mode and the opening rate of the water supply valve is advanced to the " And (h) if the temperature difference between the water supply temperature and the water return temperature is not within the set range in the step (f), the output of the blowing fan is driven in the "strong" mode, And a step of processing the image data.

In the cooling / heating water flow control method of the cooling / heating system having the fan coil unit according to the present invention, when the difference between the supplied water temperature and the return water temperature is reduced to be within the set range, the amount of opening of the supply valve is decreased to reduce the supply amount of cold water or hot water, The supply of cold water or hot water is blocked when the temperature reaches the target temperature, so that the flow rate of the cold water or the hot water required for the cooling operation or the heating operation is reduced, thereby reducing the cost required for the cooling operation and the heating operation.

Also, the method for controlling cold / hot water in a cooling / heating system having a fan coil unit according to the present invention measures a cooling rate or a heating rate by measuring the flow rate of cold water or hot water, thereby reducing the flow rate of cold water or hot water required for cooling operation or heating operation It is possible to reduce the cooling cost or the heating cost and reduce the deviation between the target temperature and the room temperature, thereby improving the efficiency of cooling operation or heating operation.

Also, the method for controlling cold / hot water in a cooling / heating system having a fan coil unit according to the present invention controls the supply amount of cold water or hot water by detecting the water supply temperature and the water return temperature of cold water or hot water for cooling and heating, Since the supply amount of the cold water or the hot water and the output of the blowing fan are controlled according to the temperature difference of the temperature, the cold / hot water control can be performed more precisely and the cost required for the cooling operation and the heating operation can be effectively reduced.

1 is a flowchart illustrating a method for controlling the flow rate of cold and hot water in a cooling / heating system having a fan coil unit according to an embodiment of the present invention.
2 is a configuration diagram illustrating a cooling / heating system including a fan coil unit according to an embodiment of the present invention.
3 is a circuit diagram illustrating a cooling / heating system including a fan coil unit according to an embodiment of the present invention.
4 is a flowchart illustrating a method for controlling the flow rate of cold and hot water in a cooling / heating system having a fan coil unit according to another embodiment of the present invention.

Hereinafter, a method for controlling the flow rate of cold and hot water in a cooling / heating system having a fan coil unit according to the present invention will be described with reference to the accompanying drawings.

In this process, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation.

In addition, the terms described below are terms defined in consideration of the functions of the present invention, which may vary depending on the intention or custom of the user, the operator.

Therefore, definitions of these terms should be made based on the contents throughout this specification.

FIG. 1 is a flowchart illustrating a method for controlling the flow rate of cold and hot water in a cooling / heating system having a fan coil unit according to an embodiment of the present invention. FIG. 3 is a circuit diagram illustrating a cooling / heating system including a fan coil unit according to an embodiment of the present invention. Referring to FIG.

1 to 3, a method for controlling cold / hot water flow in a cooling / heating system having a fan coil unit according to an embodiment of the present invention includes a fan coil unit 10 for performing a cooling operation, a heating pipe (S10) of measuring the temperature of the water supplied to the cooling / heating system provided with the indoor unit (16), the temperature of the water discharged from the cooling / heating system, and the room temperature, determining whether the room temperature has reached the target temperature (S20) (S30) of shutting off a supply valve (80) for controlling whether the cold water or hot water is supplied to the fan coil unit (10) or the heating pipe (16) when the room temperature reaches the target temperature, A step S40 of opening the supply valve 80 if the supply valve 80 is not reached, a step S50 of decreasing the temperature difference between the water supply temperature and the water return temperature so as to be included in the set range when the supply valve 80 is opened, And water temperature And a step (S60) for reducing the opening rate of the docha smaller when the supply valve 80 to be included in the set range.

When the cooling / heating system according to the present embodiment is operated, the supply valve 80 is opened and the cold water is supplied to the fan coil unit 10 to perform cooling operation or hot water is supplied to the heating pipe 16 to perform the heating operation .

When the cooling operation or the heating operation is started, the cold water or hot water supply temperature, cold water or hot water return temperature and room temperature are sensed.

At this time, when the target temperature inputted by the user is different from the room temperature, the cooling / heating operation or heating operation proceeds and the cold / hot water flow control method according to the present embodiment proceeds until the room temperature becomes equal to the target temperature.

Increasing the opening amount of the supply valve 80 if the temperature difference between the water supply temperature and the water return temperature is not included in the set range in the step S50 of determining whether the temperature difference between the water supply temperature and the water return temperature is included in the set range S70). After the step S70 of increasing the opening rate of the supply valve 80 is performed, a step S50 is performed to determine whether the temperature difference between the water supply temperature and the water return temperature is included in the set range.

When the temperature difference between the water supply temperature and the water return temperature is outside the set range and the large temperature difference is maintained, the amount of opening of the supply valve 80 is increased to the maximum value to increase the supply amount of the cold and hot water. So that a large amount of cold air is supplied to the room.

After a certain period of time has elapsed and the cooling operation or the heating operation progresses, the temperature difference between the room temperature and the target temperature decreases. When the temperature difference between the room temperature and the target temperature decreases to be within the set range, The amount of opening of the supply valve 80 is reduced and the flow rate of the cold / hot water supplied to the room is reduced.

During the cooling operation, the supply amount of the cold water is reduced and the output of the air blowing fan 12 is also reduced, so that the flow rate of cool air blown into the room is decreased.

As described above, when the temperature difference between the room temperature and the target temperature is reduced, the intermittent operation for reducing the supply flow rate of the cold / hot water proceeds, thereby reducing the cost required for driving the cooling / heating system.

When the indoor temperature and the target temperature are equal to each other, the supply valve 80 is shut off in response to the driving signal transmitted from the controller 17. In the cooling operation, Is stopped.

After the step S30 of shutting off the supply valve 80 of the present embodiment proceeds, step S20 is performed to determine whether the room temperature has reached the target temperature. Therefore, every time the set time elapses When the indoor temperature is raised or lowered differently from the target temperature, the supply valve 80 is opened again, and in the case of the cooling operation, the blowing fan 12 is driven to proceed the cooling operation or the heating operation.

Therefore, the intermittent operation is performed so that the room temperature is maintained within the set range from the target temperature, so that a pleasant indoor environment can be maintained.

The cooling / heating water flow control method of the cooling / heating system according to the present embodiment detects the flow rate of the cold / hot water supplied to the fan coil unit 10 or the heating pipe 16 to calculate the cooling ratio or the heating ratio.

Therefore, the cooling rate or the rising rate of the heating cost is reduced during the intermittent operation in which the opening amount of the supply valve 80 is reduced, so that the energy saving by the intermittent operation of the air conditioning and heating system can lead to the reduction of the expenditure cost of the user.

The cooling / heating system for controlling the flow rate of cold and hot water in the cooling / heating system as described above includes a blowing fan 12 installed in the room for circulating indoor air, and a heat exchanger (not shown) provided in contact with the room air sprayed from the blowing fan 12 A heating pipe 16 provided at the bottom of the room; a supply duct 16 for supplying cold water or hot water supplied from the central control unit to the heat exchanger 14 or the heating pipe; (40) for returning cold water or hot water discharged from a heat exchanger (14) or a heating pipe (16) to a central control unit; A water supply temperature sensor 50 sensing the temperature of hot water supplied to the cold water or the heating pipe 16 and the temperature of the hot water recovered from the cold water or the heating pipe 16 recovered from the heat exchanger 14 The temperature sensor of return temperature (60) A supply valve 80 installed in the supply passage 30 for controlling the supply of and supply of hot water to the cold water supplied to the heat exchanger 14 or the heating pipe 16, A temperature sensor for transmitting a signal and a temperature signal received from the water supply temperature sensor 50 and the water return temperature sensor 60 to determine the difference between the feed water temperature and the water return temperature, And a controller 17 for determining the difference between the signal and the target temperature and adjusting the amount of opening of the supply valve 80.

The indoor unit includes a cabinet having a suction port and a discharge port, a blowing fan (12) provided inside the discharge port for circulating indoor air, and a heat exchanger (14) disposed between the blowing fan (12) A fan coil unit 10 is provided.

Therefore, when the cold water supplied along the supply flow passage 30 is circulated through the heat exchanger 14, when the room air is discharged from the heat exchanger 14 by the blowing fan 12, cold air is sprayed into the room, .

The supply valve 80 is controlled according to the driving signal transmitted to the control unit 17 so that the cold water supplied to the heat exchanger 14 is shut off and the hot water is supplied to the heating pipe. .

In this embodiment, the cooling operation can be performed while the fan coil unit 10 is driven by one control unit 17, and the heating operation by the hot water circulated through the heating pipe 16 can be selectively performed.

The control unit 17 is driven by a controller 18 that transmits an operation signal in accordance with whether or not the user operates the apparatus. The controller 18 is provided with an operation knob for selecting a cooling operation or a heating operation, And an adjustment key.

Accordingly, the user can select the cooling operation or the heating operation by the operation of the controller 18, adjust the supply flow rate of the cold water or hot water, and the driving degree of the blowing fan 12 by setting the target temperature.

The present embodiment is characterized in that the temperature of the cold water or the hot water supplied to the room by the water supply temperature sensor 50 provided in the supply passage 30 and the return water temperature sensor 60 provided in the discharge passage 40, The temperature is controlled based on the difference between the water supply temperature and the water return temperature by sensing the temperature of the cold water or hot water discharged from the room.

The supply passage 30 is connected to the cold water supply passage 32 connected to the heat exchanger 14 so as to supply cold water to the heat exchanger 14 and to the heating pipe 16 to supply hot water to the heating pipe 16 And a hot water supply passage 34 for supplying hot water.

The discharge flow path 40 includes a cold water discharge flow path 42 connected to the heat exchanger 14 so as to discharge the cold water subjected to the heat exchange in the heat exchanger 14, And a hot water discharge passage 44 connected to the pipe 16.

The water supply temperature detection sensor 50 includes a first water supply sensor 52 installed in the cold water supply channel 32 and a second water supply sensor 54 installed in the hot water supply channel 34.

The water temperature sensor 60 includes a first water detection sensor 62 installed in the cold water discharge path 42 and a second water detection sensor 64 installed in the hot water discharge path 44.

The supply valve 80 includes a first cold water valve 82 provided in the cold water supply passage 32 and a first hot water valve 84 provided in the hot water supply passage 34.

Accordingly, when the first cold water valve 82 is opened and the first hot water valve 84 is closed according to the driving signal transmitted from the control unit 17, the cold water provided from the central control unit is supplied to the heat exchanger 14, The indoor air circulated by the blowing fan 12 is contacted to the heat exchanger 14 and sprayed to perform the cooling operation.

At this time, on the basis of the temperature signal received from the first water sensor 52 and the temperature signal received from the first water sensor 62, the control unit 17 determines whether the cold water So that the intermittent operation can be achieved by controlling the supply amount.

When the temperature difference between the water supply temperature and the water return temperature falls within the set range during the cooling operation, the first cold water valve 82 The amount of cold water supplied to the heat exchanger 14 is reduced.

Accordingly, the amount of heat absorbed and returned from the indoor air is reduced, so that the cooling operation can be performed while reducing the cost of supplying cold water. When the indoor temperature is lowered to the target temperature, the first cold water valve 82 is shut off At the same time, the blowing fan 12 is stopped to stop the cooling operation.

The first cold water valve 82 is shut off and the first hot water valve 84 is opened and the hot water supplied through the hot water supply passage 34 The heating operation is performed while circulating the indoor floor along the heating pipe 16.

At this time, the temperature difference between the water supply water temperature and the water return temperature is determined according to the temperature signal received from the second water supply sensor 54 and the second water discharge sensor 64, The amount of opening of the first hot water valve 84 is reduced to control the heating operation while reducing the hot water supply.

The blowing fan 12 of this embodiment is driven by the BLDC motor 20 and the BLDC motor 20 is provided with a first cable 22 connected to a hall sensor for sensing the rotational motion of the blowing fan 12, A second cable 24 for supplying a variable power source to control the rotational force of the BLDC motor 20, a third cable 26 for supplying a constant power to provide a driving force to the BLDC motor 20, a BLDC motor 20 And a fifth cable 28 connected to the fifth cable 28 for supplying a constant power source of a predetermined value or more to provide a driving force of the BLDC motor 20 are connected to the fifth cable 28, The core 21 is connected to an output unit for detecting noise generated in the BLDC motor 20 and for informing an abnormal state when a reference value is detected.

Therefore, if electromagnetic disturbance noise [EMI] due to high frequency is generated during driving of the blowing fan 12, noise detection signals are outputted through the output part by sensing noise, and thus it is possible to install an electronic device which may malfunction due to high frequency generation, So that the electronic device can be used in a state where the driving of the blowing fan 12 is stopped when the medical device is placed at a position adjacent to the blowing fan 12. [

As described above, the present embodiment makes it possible to prevent malfunctioning of peripheral electronic equipment due to high-frequency noise that may occur during driving of the blowing fan 12.

The output section includes a diode 23 installed in a closed loop circuit electrically connected to the ferrite core 21, a resistor 23a provided in the closed loop circuit, and an LED And a branch circuit 25 connected in parallel to the closed loop circuit. The branch circuit 25 stores electric power when the high frequency noise is received and supplies electric energy to the lamp member 29 to transmit an output signal And a capacitor 25a.

When a high frequency noise is generated in the BLDC motor 20, high frequency noises are received in the closed loop circuit connected to the ferrite core 21. At this time, electric energy is accumulated in the capacitor 25a by the electric field generated in the closed loop circuit And supplies power to the lamp member 29.

When a high frequency power is applied to the output terminal of the ferrite core 21, a constant charge is charged in the capacitor 25a to form a constant reference voltage between the first and second nodes (in a steady state) (In case of an abnormal state), that is, a current exceeding the reference voltage passes through the diode D1 and emits LED to check the abnormal state.

Accordingly, when the high frequency noise is generated in the BLDC motor 20, light is irradiated from the lamp member 29 provided on the outer wall of the fan coil unit 10 to determine whether or not noise is generated. It is possible to prevent an electronic device such as a device from malfunctioning beforehand.

The present embodiment further includes a water return valve 90 for regulating the amount of cold water discharged from the heat exchanger 14 or the amount of hot water discharged from the heating pipe 16, A second cold water valve 92 provided in the flow path 42 and a second hot water valve 94 provided in the hot water discharge path 44. [

The water return valve 90 controls the flow rate of the cold water discharged from the heat exchanger 14 and the hot water discharged from the heating pipe 16 so that the cold water or hot water sufficiently exchanges heat while circulating the room, So that the effect of improving the performance of the system is improved.

Therefore, when the difference between the water supply temperature and the water return temperature is lower than the set value and the difference between the room temperature and the target temperature appears to be out of the setting range, the opening of the second cold water valve 92 or the second hot water valve 94 And the amount of heat is reduced, so that the heat exchanged in the room can be achieved.

Thus, the supply amount of the cold water or the hot water is adjusted based on the temperature of the cold water or the hot water supplied to the room and the temperature difference between the cold water or the hot water discharged from the room, and the cooling cost or the heating cost is calculated It is possible to provide a cold / hot water flow rate control method for a cooling / heating system having a fan coil unit capable of cooling /

4 is a flowchart illustrating a method for controlling the flow rate of cold and hot water in a cooling / heating system having a fan coil unit according to another embodiment of the present invention.

Referring to FIG. 4, a method for controlling cold / hot water flow in a cooling / heating system having a fan coil unit according to another embodiment of the present invention includes a fan coil unit for performing a cooling operation or a heating operation and a heating pipe The method comprising the steps of: measuring a water supply temperature supplied to the cooling / heating system, a temperature of the water discharged from the cooling / heating system, and a room temperature; determining whether the room temperature is controlled to exceed a target temperature; A step of shutting off a water supply valve for controlling whether or not cold water or hot water is supplied to the fan coil unit or the heating pipe and stopping the blowing fan of the fan coil unit when the room temperature is not controlled to exceed the target temperature; And if the room temperature and the target temperature are the same, the output of the blowing fan is driven in the "weak" mode, When the indoor temperature and the target temperature are not equal to each other in the step of determining whether the room temperature and the target temperature are the same, whether the temperature difference between the water supply temperature and the water return temperature is within the set range And when the temperature difference between the water supply temperature and the water return temperature is within the set range, the output of the blowing fan is driven in the "medium" mode and the opening rate of the water supply valve proceeds to the " The output of the blowing fan is driven in the "strong" mode when the temperature difference between the water supply temperature and the water return temperature is not within the set range, and the opening rate of the water supply valve is " Phase "mode. ≪ / RTI >

Here, the step in which the room temperature is controlled to exceed the target temperature includes the case where the cooling operation is performed and the case where the heating operation is performed, and in the cooling operation, the room temperature is controlled to be lower than the target temperature. The room temperature is controlled to be higher than the target temperature.

Accordingly, the step of determining whether the temperature difference between the water supply and the return water is included in the set range when the cooling operation is performed includes the step of determining whether the water supply temperature is lower than the water return temperature, It can be seen that the water supply temperature is higher than the water return temperature.

The step of determining whether the temperature difference between the room temperature and the target temperature is within the set range includes the steps of: when the room temperature is higher than the target temperature in the cooling operation; It is low.

As described above, a concrete example of controlling the cold / hot water flow rate by the difference between the room temperature and the target temperature will be described as follows.

When the room temperature is higher than the target temperature by more than 2 degrees in the cooling operation, the blowing fan output of the cooling / heating system including the fan coil unit according to the present embodiment is higher than the set temperature When 1 degree is lowered, it stops.

The blowing fan output of the cooling / heating system according to the present embodiment is such that when the room temperature is lower than the target temperature by 2 degrees or less in the heating operation, strong wind is blown, when 1 degree is low, If the temperature is high, it is stopped.

As described above, when the output of the blowing fan is controlled, the opening rate of the water supply valve for determining the flow rate of the cold / hot water is controlled to be interlocked with each other, so that more precise control can be performed.

When the opening rate of the water supply valve that determines whether or not the guttering cold / hot water is supplied is opened to the maximum, the set flow rate is 100% when the cold / hot water flow rate is "Up ", 70% of the set flow rate when the cold / hot water flow rate is & When the flow rate is "approx.", It is controlled to 49% of the set flow rate, and to 0% of the set flow rate when the water supply valve is closed and the cold / hot water supply is shut off.

The set flow rate refers to a value for setting the opening degree so that the flow rate varies depending on the valve opening value, which is opened by the flow rate required in the present embodiment.

 For example, when a valve having a cold / hot water flow rate of 28 LPM is applied when the water supply valve is opened, if the cold / hot water flow rate required by the fan coil unit is 20 LPM and the opening value at this time is 70, the set value is 70 100%.

As described above, the cold / hot water supply amount and the output of the blower fan can be controlled based on the temperature difference between the water supply temperature and the water return temperature, and the temperature difference between the room temperature and the target temperature.

Thus, the supply amount of the cold water or the hot water is adjusted based on the temperature of the cold water or the hot water supplied to the room and the temperature difference between the cold water or the hot water discharged from the room, and the cooling cost or the heating cost is calculated It is possible to provide a cold / hot water flow rate control method for a cooling / heating system having a fan coil unit capable of cooling /

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. .

In addition, although the cold / hot water flow rate control method of the cooling / heating system having the fan coil unit is described as an example, this is merely an example, and other than the cold / hot water flow control method of the cooling / heating system including the fan coil unit, A method of controlling the flow rate of cold and hot water in the system can be used.

Accordingly, the true scope of the present invention should be determined by the following claims.

10: fan coil unit 12: blowing fan
14: heat exchanger 14a: drain pan
14b: cooling pin 14c: drain pipe
16: heating pipe 17:
18: controller 24: cleaning unit
24a: Humidifier portion 24b: Supply pipe
24c: nozzle 24d: cleaning valve
30: supply flow path 32: cold water supply flow path
34: hot water supply channel 50: water temperature sensor
52: first water sensor 54: second water sensor
60: a return water temperature sensor 62: a first water return sensor
64: second water detection sensor 70: flow meter
72: cold water meter 74: hot water meter
80: supply valve 82: first cold water valve
84: first hot water valve 90: return valve
92: second cold water valve 94: second hot water valve

Claims (5)

(a) measuring a water supply temperature supplied to a cooling / heating system provided with a fan coil unit for performing a cooling operation and a heating pipe installed at an indoor floor, a temperature of a water returning from the heating / cooling system, and a room temperature;
(b) determining whether the room temperature has reached the target temperature;
(c) shutting off the supply valve for controlling whether the cold or hot water is supplied to the fan coil unit or the heating pipe when the room temperature reaches the target temperature;
(d) opening the supply valve if the room temperature has not reached the target temperature;
(e) when the supply valve is opened, determining that the temperature difference between the water supply temperature and the water return temperature is reduced to be included in the set range;
(f) decreasing the opening rate of the supply valve when the temperature difference between the water supply temperature and the water return temperature falls within the set range; And
(g) increasing the opening amount of the supply valve if the temperature difference between the water supply temperature and the water return temperature is not included in the setting range in the step (e)
After the step (g), the step (e) is performed,
The blowing fan for circulating indoor air to the heat exchanger side of the fan coil unit is driven by the BLDC motor,
In the BLDC motor,
A first cable connected to a hall sensor for sensing a rotational motion of the blowing fan;
A second cable for supplying variable power to control the rotational force of the BLDC motor;
A third cable supplying a constant power source to provide a driving force to the BLDC motor;
A fourth cable constituting a ground line of the BLDC motor; And
A fifth cable for supplying a constant power source of a set value or more is connected to provide the driving force of the BLDC motor,
The ferrite core connected to the fifth cable is connected to an output unit for detecting noise generated in the BLDC motor and for notifying an abnormal state when a reference value is detected,
The output unit includes:
A diode installed in a closed loop circuit electrically connected to the ferrite core;
A resistor installed in the closed loop circuit;
An LED installed in the closed loop circuit to perform a light emission operation;
A branching circuit connected in parallel to the closed loop circuit; And
And a capacitor provided in the branch circuit and storing an electric power when receiving the high frequency noise and supplying electric energy to the lamp member to transmit an output signal,
When a high frequency power is applied to the output terminal of the ferrite core, a constant charge is charged in the capacitor to form a constant reference voltage between the first node and the second node to indicate a steady state, and when an electromagnetic disturbance noise occurs, Wherein a current exceeding the reference voltage passes through the diode to cause the LED to emit light. A method for controlling a flow rate of cold and hot water in a cooling / heating system, comprising:
delete The method according to claim 1,
Wherein the step (b) is performed after the step (c) is performed.
The method according to claim 1,
Wherein a cooling rate or a heating ratio is calculated by sensing a flow rate of cold / hot water supplied to the fan coil unit or the heating pipe, and the cooling / heating ratio is calculated.
(a) measuring a water supply temperature supplied to a cooling / heating system provided with a fan coil unit for performing a cooling operation or a heating operation and a heating pipe installed at an indoor floor, a temperature of the water discharged from the cooling / heating system, and a room temperature;
(b) determining whether the room temperature is controlled to exceed the target temperature;
(c) shutting off the water supply valve for controlling whether the cold water or hot water is supplied to the fan coil unit or the heating pipe when the room temperature is controlled to exceed the target temperature, and stopping the blowing fan of the fan coil unit;
(d) determining whether the room temperature and the target temperature are identical if the room temperature is not controlled beyond the target temperature;
(e) when the room temperature and the target temperature are the same, the output of the blowing fan is driven in the "weak" mode, and the opening rate of the water supply valve proceeds in the "lower"mode;
(f) determining whether the temperature difference between the water supply temperature and the water return temperature is within the set range if the room temperature and the target temperature are not the same in step (d);
(g) when the temperature difference between the water supply temperature and the water return temperature is within the set range, the output of the blowing fan is driven in the "medium" mode and the opening rate of the water supply valve is advanced to the " And
(h) if the temperature difference between the water supply temperature and the water return temperature is not within the set range in the step (f), the output of the blowing fan is driven in the "strong" mode, Comprising an ongoing step,
Wherein the blowing fan is driven by a BLDC motor,
In the BLDC motor,
A first cable connected to a hall sensor for sensing a rotational motion of the blowing fan;
A second cable for supplying variable power to control the rotational force of the BLDC motor;
A third cable supplying a constant power source to provide a driving force to the BLDC motor;
A fourth cable constituting a ground line of the BLDC motor; And
A fifth cable for supplying a constant power source of a set value or more is connected to provide the driving force of the BLDC motor,
The ferrite core connected to the fifth cable is connected to an output unit for detecting noise generated in the BLDC motor and for notifying an abnormal state when a reference value is detected,
The output unit includes:
A diode installed in a closed loop circuit electrically connected to the ferrite core;
A resistor installed in the closed loop circuit;
An LED installed in the closed loop circuit to perform a light emission operation;
A branching circuit connected in parallel to the closed loop circuit; And
And a capacitor provided in the branch circuit and storing an electric power when receiving the high frequency noise and supplying electric energy to the lamp member to transmit an output signal,
When a high frequency power is applied to the output terminal of the ferrite core, a constant charge is charged in the capacitor to form a constant reference voltage between the first node and the second node to indicate a steady state, and when an electromagnetic disturbance noise occurs, Wherein a current exceeding the reference voltage passes through the diode to cause the LED to emit light. A method for controlling a flow rate of cold and hot water in a cooling / heating system, comprising:
KR1020150190218A 2015-12-30 2015-12-30 Flow control method for cold and hot water in cooling and heating system with fan coil unit KR101774570B1 (en)

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KR102181309B1 (en) * 2020-06-02 2020-11-20 대륙종합건설주식회사 Pigsty formed a cooling system using an air-conditioning tube
KR102524281B1 (en) * 2022-05-31 2023-04-21 (주)에이피 Up-and-down heating operation type fan coil cooling and heating system with refrigerant flow interlocking inverter turbofan

Citations (3)

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Publication number Priority date Publication date Assignee Title
KR101031701B1 (en) * 2009-05-28 2011-04-29 코오롱건설주식회사 Cooling and heating system in housing using a radiation and convection
KR101393618B1 (en) * 2012-08-16 2014-05-27 주식회사 한성시스코 Auto-control heating system and method for controlling the same
KR101532635B1 (en) * 2013-10-25 2015-06-30 현대디지탈시스템(주) Temperature control system of a return water for district heating

Patent Citations (3)

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Publication number Priority date Publication date Assignee Title
KR101031701B1 (en) * 2009-05-28 2011-04-29 코오롱건설주식회사 Cooling and heating system in housing using a radiation and convection
KR101393618B1 (en) * 2012-08-16 2014-05-27 주식회사 한성시스코 Auto-control heating system and method for controlling the same
KR101532635B1 (en) * 2013-10-25 2015-06-30 현대디지탈시스템(주) Temperature control system of a return water for district heating

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