KR101743722B1 - Cooling and heating system with fan coil unit and control method thereof - Google Patents

Abstract

The present invention provides a fan coil unit comprising: a fan coil unit installed in a room and having a blowing fan for circulating room air, and a heat exchanger provided in contact with the room air sprayed from the blowing fan; A heating pipe installed on an indoor floor; A supply passage for supplying cold water or hot water supplied from a central control unit to the heat exchanger or the heating pipe; A discharge duct for returning cold water or hot water discharged from the heat exchanger or the heating pipe to the central control unit; A water supply temperature sensor installed in the supply passage and sensing the temperature of the cold water supplied to the heat exchanger or the hot water supplied to the heating pipe; A circulating water temperature sensor for sensing the temperature of the cold water that is returned from the heat exchanger or the hot water that is circulated in the heating pipe; A supply valve installed in the supply passage so as to adjust the supply amount and the supply amount of the hot water supplied to the heat exchanger or the hot water supplied to the heating pipe; An indoor temperature sensor for sensing the indoor temperature and transmitting a temperature signal; And determining a difference between a feed water temperature and a water return temperature by a temperature signal received from the feed water temperature sensor and the return water temperature sensor and determining a difference between a temperature signal received from the room temperature sensor and a target temperature, And a control unit for controlling the opening amount.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling / heating system having a fan coil unit,

The present invention relates to a cooling and heating system having a fan coil unit and a control method thereof, and more particularly, to a cooling and heating system having a fan coil unit, in which a cooling operation or a heating operation is selected by operating one controller, And a fan coil unit capable of preventing the accumulation of foreign matter in the fan coil unit performing the cooling operation and capable of humidifying the room while the heating operation proceeds, and a control method thereof will be.

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 has a problem that the cooling operation or the heating operation corresponding to the user's taste is difficult to be performed for each household because the cooling / heating operation is performed by the operation in the central machine room.

In addition, since the heat exchange efficiency of the room air passing through the heat exchanger is lowered when foreign substances accumulate in the heat exchanger installed in the fan coil unit, the cooling / heating system according to the related art can not reduce the cost required for the cooling operation .

In addition, the conventional air conditioning and heating system may be detrimental to the user's health because the indoor is kept dry during the dry winter heating operation, and a separate humidifier must be purchased and driven to increase the humidity of the room There is a problem.

Therefore, there is a need for improvement.

A cooling operation or a heating operation can be selected by operating one controller and cooling operation or heating operation can be separately controlled in each generation and the accumulation of foreign matter in the fan coil unit for cooling operation can be prevented And a fan coil unit capable of humidifying the room while the heating operation is proceeding, and a control method thereof.

The present invention provides a fan coil unit comprising: a fan coil unit installed in a room and having a blowing fan for circulating room air, and a heat exchanger provided in contact with the room air sprayed from the blowing fan; A heating pipe installed on an indoor floor; A supply passage for supplying cold water or hot water supplied from a central control unit to the heat exchanger or the heating pipe; A discharge duct for returning cold water or hot water discharged from the heat exchanger or the heating pipe to the central control unit; A water supply temperature sensor installed in the supply passage and sensing the temperature of the cold water supplied to the heat exchanger or the hot water supplied to the heating pipe; A circulating water temperature sensor for sensing the temperature of the cold water that is returned from the heat exchanger or the hot water that is circulated in the heating pipe; A supply valve installed in the supply passage so as to adjust the supply amount and the supply amount of the hot water supplied to the heat exchanger or the hot water supplied to the heating pipe; An indoor temperature sensor for sensing the indoor temperature and transmitting a temperature signal; And determining a difference between a feed water temperature and a water return temperature by a temperature signal received from the feed water temperature sensor and the return water temperature sensor and determining a difference between a temperature signal received from the room temperature sensor and a target temperature, And a control unit for controlling the opening amount.

The supply passage of the present invention may further comprise: a cold water supply passage connected to the heat exchanger to supply cold water to the heat exchanger; And a hot water supply channel connected to the heating pipe to supply hot water to the heating pipe, wherein the discharge channel includes a cold water discharge channel connected to the heat exchanger to discharge cold water having undergone heat exchange in the heat exchanger; And a hot water discharge channel connected to the heating pipe so as to discharge hot water subjected to heat exchange in the heating pipe, wherein the water supply temperature sensing sensor comprises: a first water supply sensor installed in the cold water supply channel; And a second water supply sensor installed in the hot water supply passage, wherein the water return temperature sensor comprises: a first water detection sensor installed in the cold water discharge channel; And a second water detection sensor installed in the hot water discharge passage, wherein the supply valve includes: a first cold water valve installed in the cold water supply passage; And a first hot water valve provided in the hot water supply passage.

Further, the present invention may further include a water return valve for regulating the discharge amount of cold water discharged from the heat exchanger or hot water discharged from the heating pipe, wherein the water return valve includes: a second cold water valve installed in the cold water discharge channel; And a second hot water valve installed in the hot water discharge passage.

Further, the present invention may include a sensing unit for measuring an accumulation amount of foreign matter accumulated in the heat exchanger and transmitting an accumulated signal; And a washing unit for injecting wash water into the heat exchanger when a driving signal transmitted from the controller is input according to an accumulated signal received from the sensing unit.

In addition, the sensing unit of the present invention may include a light emitting unit mounted on a plurality of cooling fins provided in the heat exchanger and emitting light; And a light receiving unit for sensing light received through the space between the cooling fins and the cooling fins and for transmitting an accumulated signal.

Also, the washing unit of the present invention may include a drain pan for desiccating the condensed water falling from the heat exchanger and discharging the condensed water to one side; A storage tank for storing condensed water discharged from the drain pan; A circulation pipe extending from the storage tank to the heat exchanger and having a plurality of nozzles installed therein; And a pump installed in the circulation pipe to supply condensed water desalinated to the storage tank to the nozzle when a driving signal is transmitted from the control unit according to an accumulated signal transmitted from the light receiving unit.

The cooling / heating system including the fan coil unit according to the present invention and the control method thereof control the cooling operation by driving the fan coil unit by one controller and the control unit and the heating operation by circulating the hot water through the heating pipe It is possible to reduce the time and cost required for the installation of the air-conditioning system and to reduce the space required for installing the air-conditioning system.

The cooling / heating system including the fan coil unit according to the present invention and the control method thereof are provided with a supply valve or a water return valve for regulating the supply amount and supply amount of hot water supplied to the fan coil unit and the heating pipe The cooling operation and the heating operation can be easily switched and controlled and the temperature control can be performed by adjusting the supply amount of the cold water or hot water so that the heat exchange efficiency can be improved and the cost for cooling operation and heating operation can be reduced .

Also, the cooling / heating system including the fan coil unit according to the present invention and the control method thereof include a cleaning unit for removing foreign substances accumulated in the fan coil unit, thereby preventing accumulation of foreign matter in the heat exchanger, , It is advantageous in that the cost required for the cooling operation can be reduced.

In the cooling / heating system and the control method of the present invention including the fan coil unit according to the present invention, when the user inputs the target temperature, the cooling / heating operation is determined by determining the difference between the room temperature and the target temperature. It is possible to select either one of the cooling operation or the heating operation by using one controller to reduce the cost of installing the cooling and heating system and to easily control the cooling operation or the heating operation .

1 is a configuration diagram illustrating a cooling / heating system including a fan coil unit according to an embodiment of the present invention.
2 is a block diagram of a sensing unit and a cleaning unit of a cooling / heating system having 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 control method of a cooling / heating system including a fan coil unit according to an embodiment of the present invention.

Hereinafter, an embodiment of a cooling and heating system including a fan coil unit according to the present invention and a control method thereof 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 configuration diagram illustrating a cooling / heating system including a fan coil unit according to an embodiment of the present invention. FIG. 2 is a block diagram of 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.

1 to 3, a cooling and heating system including a fan coil unit according to an embodiment of the present invention includes a blowing fan 12 installed in a room for circulating room air, A fan coil unit 10 having a heat exchanger 14 installed in contact with the indoor air to be sprayed, a heating pipe 16 provided on the floor of the room, and a cold or hot water supplied from the central control unit to the heat exchanger A supply flow path 30 for supplying cold water or hot water discharged from the heat exchanger 14 or the heating piping 16 to a central control section; A water supply temperature sensing sensor 50 installed in the heat exchanger 14 for sensing the temperature of the cold water supplied to the heat exchanger 14 or the hot water supplied to the heating pipe 16 and the cold water or the heating pipe 16 ), The temperature of the hot water A supply valve 80 provided in the supply passage 30 for controlling the supply amount and supply amount of the hot water supplied to the cold water or the heating pipe 16 supplied to the heat exchanger 14, 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 temperature signal received from the sensor 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 The supply amount control is performed.

The opening amount of the first cold water valve 82 decreases in accordance with the driving signal transmitted from the control unit 17 so that the flow rate of the cold water supplied to the heat exchanger 14 .

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.

In the heating operation, the first cold water valve 82 is shut off, the first hot water valve 84 is opened, and hot water supplied through the hot water supply passage 34 is circulated along the heating pipe 16 So that the heating operation is performed.

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 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.

The present invention further includes a washing unit 24 that blows washing water to the heat exchanger 14 when the cooling operation is started and the washing unit 24 supplies a constant amount of water from the outside of the fan coil unit 10 A supply pipe 24b to which a plurality of nozzles 24c are installed and a cleaning valve 24d to be installed in the supply pipe 24b.

Accordingly, when the cleaning valve 24d is opened according to the driving signal transmitted from the control unit at the beginning of the cooling operation, the cleaning water is supplied along the supply pipe 24b, and the cleaning water is supplied through the plurality of nozzles 24c installed in the supply pipe 24b The washing water is sprayed on the heat exchanger 14 and dropped together with foreign matters such as dust accumulated in the cooling fin 14b and is drained to the drain pan 14a.

When the cooling operation is performed in the state where the foreign substances accumulated in the heat exchanger 14 are removed, the heat exchanger 14 is operated to perform the cleaning operation as described above, It is possible to reduce the supply flow rate of the cold water, thereby reducing the cost of the cooling operation.

The washing unit 24 further includes a humidifying unit 24a connected to the supply pipe 24b and storing and heating the water to discharge the steam. Therefore, hot water is supplied to the heating pipe 16 during the winter, If the humidity signal is transmitted to the controller 17 from the humidity sensor that detects the room humidity during the heating operation and the humidity signal is less than the set value, 24d are opened and the humidifying portion 24a is driven.

The constant water supplied through the supply pipe 24b is stored in the humidifying unit 24a and then heated to generate steam and is discharged to the outside of the fan coil unit 10 by the driving of the blowing fan 12, .

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, An abnormality notification unit is connected to the core 21 to detect noise generated in the BLDC motor 20 and to report an abnormal state when an abnormality 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.

A control method of the cooling / heating system including the fan coil unit according to the embodiment of the present invention will be described as follows.

4 is a flowchart illustrating a control method of a cooling / heating system including a fan coil unit according to an embodiment of the present invention.

Referring to FIGS. 1 to 4, a method for controlling a cooling / heating system including a fan coil unit according to an embodiment of the present invention includes a step (S10) of determining whether a target temperature is inputted when a cooling / heating system is driven, (S20) of determining a cooling operation or a heating operation by sensing a room temperature and calculating a temperature difference between a room temperature and a target temperature, determining whether the cooling operation is determined (S30), cooling operation (S40) of spraying washing water to the heat exchanger (14) constituting the fan coil unit (10) for a set time to remove foreign substances accumulated in the heat exchanger (14) The first cold water valve 82 provided in the cold water supply passage 32 for supplying the cold water to the fan coil unit 10 is opened and the room air is blown toward the heat exchanger 14, ) Is driven to cool And a step (S50) to proceed with the former.

The user operates the controller to start the heating and cooling system. When the target temperature is inputted, the indoor temperature is sensed by the temperature sensor installed in the fan coil unit so that the indoor temperature is sensed and the temperature signal is transmitted to the control unit.

When the target temperature is lower than the room temperature, it is determined that the cooling operation is performed. If the target temperature is higher than the room temperature, it is determined that the heating operation is performed.

The cleaning valve 24d provided in the supply pipe 24b is opened and a constant water supplied from the outside of the fan coil unit 10 is supplied into the fan coil unit 10 along the supply pipe 24b The washing water is sprayed from the supply pipe 24b disposed above the heat exchanger 14 through the nozzle 24c to remove the foreign substances accumulated in the heat exchanger 14. [

The washing water sprayed to the heat exchanger 14 flows downward along the cooling fins 14b of the heat exchanger 14 and is drained to the drain pan 14a together with foreign matters such as dust accumulated in the heat exchanger 14, And is discharged to the outside of the fan coil unit 10 along the drain pipe 14c provided in the fan 14a.

In the present embodiment, if the target temperature is not inputted in the step of determining whether the target temperature is re-inputted (S10), the step S60 where the last target temperature inputted before the end of the operation is set is performed, The cooling operation or the heating operation is determined (S20).

Therefore, if the user does not input the target temperature after driving the cooling / heating system, the target temperature that was input when the cooling / heating system was last driven is set again.

Therefore, even if the user does not input the target temperature separately, the control unit 17 sets the target temperature as the final target temperature so as to perform the cooling operation or the heating operation.

In the present embodiment, the step S40 of spraying the washing water to the heat exchanger 14 is omitted if it is determined that the cooling operation is not performed in the cooling operation (S30), and the heating pipe The first hot water valve 84 of the hot water supply passage 44 connected to the first hot water valve 16 is opened and the heating operation is started.

Therefore, during the heating operation, the first cold water valve 82 is closed and the cold water is not supplied to the fan coil unit 10, and hot water is supplied to the heating pipe 16 to perform the heating operation. At this time, When the humidity sensor for sensing the humidity is driven and the humidity of the room is lowered below the set value, the cleaning valve 24d is opened and the supplied water is supplied to the humidifier 24a.

The humidifying unit 24a generates steam by heating the water supplied through the supply pipe 24b and the steam generated from the humidifying unit 24a can be sprayed into the room by driving the blowing fan 12. [

Here, the flow path provided to the humidifying unit 24a with the constant water provided along the supply pipe 24b can be easily carried out by those skilled in the art who are aware of the technical constitution of the present invention, so detailed drawings and explanations will be omitted.

Thus, the cold water supplied from the central control unit can be supplied to the fan coil unit to perform the cooling operation, and the hot water supplied from the central control unit can be supplied to the heating pipe provided on the floor of the room to perform the heating operation. It is possible to provide a cooling / heating system having a fan coil unit capable of controlling the supply amount of hot water and a control method thereof.

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. .

The cooling / heating system including the fan coil unit and the control method thereof have been described as an example. However, the cooling / heating system and the control method of the present invention are not limited to the cooling / Its control method 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 (9)

A fan coil unit installed in the room and having a fan for circulating indoor air and a heat exchanger installed in contact with the indoor air sprayed from the fan;
A heating pipe installed on an indoor floor;
A supply passage for supplying cold water or hot water supplied from a central control unit to the heat exchanger or the heating pipe;
A discharge duct for returning cold water or hot water discharged from the heat exchanger or the heating pipe to the central control unit;
A water supply temperature sensor installed in the supply passage and sensing the temperature of the cold water supplied to the heat exchanger or the hot water supplied to the heating pipe;
A circulating water temperature sensor for sensing the temperature of the cold water that is returned from the heat exchanger or the hot water that is circulated in the heating pipe;
A supply valve installed in the supply passage so as to adjust the supply amount and the supply amount of the hot water supplied to the heat exchanger or the hot water supplied to the heating pipe;
An indoor temperature sensor for sensing the indoor temperature and transmitting a temperature signal; And
A difference between a feed water temperature and a water return temperature is determined by a temperature signal received from the feed water temperature sensor and the return water temperature sensor, and a difference between a temperature signal received from the room temperature sensor and a target temperature is determined, And a control unit for controlling the metering,
The blowing fan is driven by a BLDC motor. The BLDC motor includes a first cable connected to a hall sensor for sensing a rotational motion of the blowing fan, and a second cable connected to a second sensor for supplying a variable power to control the rotational force of the BLDC motor. A cable, a third cable for supplying a constant power source of a set value to provide a driving force to the BLDC motor, a fourth cable constituting a ground line of the BLDC motor, and a constant current source for supplying a driving power of the BLDC motor. And an output unit for outputting a noise sensing signal is connected to the ferrite core connected to the fifth cable when a noise exceeding a reference value generated in the BLDC motor is sensed,
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;
A lamp member installed in the closed loop circuit to perform a light emission operation;
A branching circuit connected in parallel to the closed loop circuit;
And a capacitor installed in the branch circuit and storing a power when the high frequency noise is received, and a capacitor for supplying an electric energy to the lamp member to transmit an output signal.
The apparatus according to claim 1,
A cold water supply passage connected to the heat exchanger to supply cold water to the heat exchanger; And
And a hot water supply channel connected to the heating pipe to supply hot water to the heating pipe,
The discharge passage
A cold water discharge passage connected to the heat exchanger to discharge cold water having undergone heat exchange in the heat exchanger; And
And a hot water discharge channel connected to the heating pipe so as to discharge hot water subjected to heat exchange in the heating pipe,
The water supply temperature sensor includes:
A first water supply sensor installed in the cold water supply passage; And
And a second water supply sensor installed in the hot water supply passage,
The return water temperature sensor includes:
A first water detection sensor installed in the cold water discharge path; And
And a second water detection sensor installed in the hot water discharge passage,
Wherein the supply valve comprises:
A first cold water valve installed in the cold water supply passage; And
And a first hot water valve provided in the hot water supply passage.
3. The method of claim 2,
Further comprising a water return valve for regulating the discharge amount of the cold water discharged from the heat exchanger or the hot water discharged from the heating pipe,
The water-
A second cold water valve installed in the cold water discharge passage; And
And a second hot water valve installed in the hot water discharge passage.
4. The method according to any one of claims 1 to 3,
Further comprising a washing unit for injecting wash water into the heat exchanger when the cooling operation is started,
The cleaning unit includes:
A supply pipe supplying a constant water from the outside of the fan coil unit and having a plurality of nozzles installed therein; And
And a cleaning valve installed in the supply pipe.
5. The method of claim 4,
Wherein the cleaning unit further comprises a humidifying unit connected to the supply pipe to store and heat the water to discharge the steam.
delete (a) determining whether a target temperature is inputted when the cooling / heating system is driven;
(b) determining a cooling operation or a heating operation by sensing a room temperature when the target temperature is input and calculating a temperature difference between the room temperature and the target temperature;
(c) determining whether cooling operation has been determined;
(d) when the cooling operation is started, washing water is sprayed to the heat exchanger constituting the fan coil unit for a preset time period to remove foreign substances accumulated in the heat exchanger;
(e) When the washing water injection is completed in the heat exchanger, the first cold water valve installed in the cold water supply passage for supplying the cold water to the fan coil unit is opened and the blower fan is driven to circulate indoor air by blowing indoor air to the heat exchanger And performing a cooling operation,
The steps (a), (b), (c), (d) and (e)
The fan coil unit;
A heating pipe installed on an indoor floor;
A supply passage for supplying cold water or hot water supplied from a central control unit to the heat exchanger or the heating pipe;
A discharge duct for returning cold water or hot water discharged from the heat exchanger or the heating pipe to the central control unit;
A water supply temperature sensor installed in the supply passage and sensing the temperature of the cold water supplied to the heat exchanger or the hot water supplied to the heating pipe;
A circulating water temperature sensor for sensing the temperature of the cold water that is returned from the heat exchanger or the hot water that is circulated in the heating pipe;
A supply valve installed in the supply passage so as to adjust the supply amount and the supply amount of the hot water supplied to the heat exchanger or the hot water supplied to the heating pipe;
An indoor temperature sensor for sensing the indoor temperature and transmitting a temperature signal; And
A difference between a feed water temperature and a water return temperature is determined by a temperature signal received from the feed water temperature sensor and the return water temperature sensor, and a difference between a temperature signal received from the room temperature sensor and a target temperature is determined, And a fan coil unit including a control unit for controlling the amount of air supplied by the fan coil unit,
The blowing fan is driven by a BLDC motor. The BLDC motor includes a first cable connected to a hall sensor for sensing a rotational motion of the blowing fan, and a second cable connected to a second sensor for supplying a variable power to control the rotational force of the BLDC motor. A cable, a third cable for supplying a constant power source of a set value to provide a driving force to the BLDC motor, a fourth cable constituting a ground line of the BLDC motor, and a constant current source for supplying a driving power of the BLDC motor. And an output unit for outputting a noise sensing signal is connected to the ferrite core connected to the fifth cable when a noise exceeding a reference value generated in the BLDC motor is sensed,
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;
A lamp member installed in the closed loop circuit to perform a light emission operation;
A branching circuit connected in parallel to the closed loop circuit;
And a capacitor installed in the branch circuit and storing a power source when high frequency noise is received, and supplying a power signal to the lamp member to transmit an output signal.
8. The method of claim 7,
Wherein if the target temperature is not input in the step (a), the step of setting the final target temperature inputted before the end of the operation is performed, and the step (b) is performed. Way.
8. The method of claim 7,
If the cooling operation is not determined in the step (c), the step (d) is omitted, and the first hot water valve of the hot water supply channel connected to the heating pipe installed on the floor of the room is opened, Wherein the fan coil unit is a fan coil unit.

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