KR20090078175A - A fan coil unit - Google Patents

Abstract

A fan coil unit is provided to increase air conditioning efficiency by improving heat exchange efficiency of the heat exchanger. A fan coil unit(100) comprises a heat exchanger, a blower unit, a control box(102), a temperature sensor, a flow control valve, a master controller(180), and a remote controller(R). The heat exchanger performs heat-exchange between cold or hot water and indoor air. The control box controls the operation of the blower unit. The temperature sensor measures the temperature of one side of the heat exchanger. The flow control valve selectively controls the flow rate flowing into the heat exchanger. The master controller regulates the opening of the flow control valve by comparing the measured temperature of the temperature sensor with the preset temperature. The remote controller is to set up the preset temperature. The master controller is installed outside an indoor room(I) and electrically connected to the remote controller and the control box.

Description

Fan Coil Unit {A Fan Coil Unit}

1 is a longitudinal sectional view showing a conventional fan coil unit configuration.

Figure 2 is an installation state of the fan coil unit according to the present invention.

Figure 3 is a schematic diagram showing the configuration of a fan coil unit according to the present invention.

Explanation of symbols on the main parts of the drawings

100. Fan coil unit 110. Case

112. Outlet port 114. Duct connector

116. Top panel 120. Filter

130. Heat exchanger 132. Inlet pipe

134. Water outlet pipe 140. Blowing means

142.Motor 144.Blowing Fan

146. Fan housing 160. Temperature sensor

162. Air temperature sensor 164. Intake temperature sensor

166. Water outlet temperature sensor 180. Master controller

200. Flow control valve 220. Refrigerator

240. Boiler 250. Supply pipe

252. Supply shutoff valve 260. Recovery pipe

262. Recovery shutoff valve R. remote

The present invention relates to a fan coil unit, and more particularly, a master controller measuring discharge air temperature or inlet / outlet temperature with a plurality of temperature sensors, and selectively controlling the inflow flow rate by comparing the measured value with a preset temperature value. It relates to a fan coil unit provided.

In general, a fan coil unit receives cold water or hot water from a freezer or a boiler during cooling and heating of a building, passes through a heatexchanger, cools or heats surrounding air, and then blows heat-exchanged air into a fan ( It is an air conditioner for cooling or heating by discharging to a room according to the driving of a blower.

Referring to Figure 1 attached to the structure of such a fan coil unit as follows.

Figure 1 is a longitudinal cross-sectional view showing a conventional fan coil unit configuration.

As shown in the drawing, a conventional fan coil unit has a casing (1) forming an appearance, a heat exchanger (2) installed inclined inside the casing (1) to exchange heat in the room, and the heat exchanger (2). Is installed in the lower part of the drain pan (3) to receive the condensate generated during the heat exchange and discharge to the outside, and blows the air in the room to the heat exchanger (2) for heat exchange, while passing through the heat exchanger (2) A blower fan 4 through which the compressed air is discharged to the outside of the casing, and a filter 6 installed in the inlet port 5 formed at the lower part of the casing 1 to filter dust contained in the indoor air. Consists of.

The blower fan 4 is fixedly installed on the mounting plate 10 and rotates as the motor 8 drives to suck outside air.

Therefore, in the process of supplying the cold or hot water from the refrigerator or the boiler (not shown) to the heat exchanger 2, the indoor air is cascaded through the inlet 5 by the rotation of the blower fan 4 according to the driving of the motor 8. When it is introduced into (1), dust and the like is filtered by the filter (6) and then introduced into the casing (1) to forcibly pass through the heat exchanger (2).

In this way, the air in the room is forced into the casing 1 by the driving of the blower fan 4 and passes through the heat exchanger 2 so that the heat exchange is made cold, or when the air is heated, the upper part of the casing 1 is installed. Since it is discharged to the room through the discharge grill (9), the cooling and heating of the room is made.

However, the air conditioner according to the prior art having the above configuration has the following problems.

That is, the heat exchanger (2) is connected to a refrigerator or a boiler to receive cold water or hot water. At this time, a pump (not shown) for forcing a flow of cold water or hot water between the freezer or the boiler and the heat exchanger (2). ) Is provided.

And, such a pump is added or subtracted the supply amount of cold water or hot water from the freezer or boiler according to the room temperature set by the user.

In other words, when the fan coil unit is operated for the purpose of cooling in the summer, when the user sets the temperature lower, the air conditioning efficiency is increased because the pump is pumped only as much as the flow rate corresponding to the set temperature even though the room is heated by hot heat. There is a problem of deterioration.

In addition, due to the above problem, the user may feel dissatisfaction and, in the end, product satisfaction may be lowered, which is undesirable.

An object of the present invention is to solve the problems of the prior art as described above, by measuring the discharge air temperature or inlet / outlet temperature with a plurality of temperature sensors, and compares the measured value with a predetermined temperature value selectively It is to provide a fan coil unit with a master controller for controlling.

The fan coil unit according to the present invention includes a heat exchanger for exchanging cold or hot water with indoor air, a blowing means for forcing an air flow, a control box for controlling the operation of the blowing means, and a temperature of one side of the heat exchanger. And a temperature sensor to adjust the flow rate flowing into the heat exchanger, a master controller to adjust the opening degree of the flow control valve by comparing the measured temperature and the set temperature of the temperature sensor, and the set temperature. It is configured to include a remote control for setting, the master controller is installed on the outside of the indoor space is characterized in that it is electrically connected to the remote control and the control box.

The temperature sensor is an air temperature sensor for measuring the temperature of the air heat exchanged with hot or cold water in the heat exchanger, an inlet temperature sensor for measuring the water temperature flowing into the heat exchanger, and the water temperature flowing through the heat exchanger Characterized in that it comprises a water output temperature sensor to measure.

When the hot water is supplied to the heat exchanger, and the measured temperature measured by the air temperature sensor is less than the set temperature, the master controller increases the opening degree of the flow control valve.

When the hot water is supplied to the heat exchanger, and the difference between the temperature measured by the intake temperature sensor and the outlet water temperature sensor is more than a set temperature difference, the master controller increases the opening degree of the flow control valve.

When the cold water is supplied to the heat exchanger and the measured temperature measured by the air temperature sensor is equal to or higher than a set temperature, the master controller increases the opening degree of the flow control valve.

When the cold water is supplied to the heat exchanger and the difference between the temperatures measured by the intake temperature sensor and the outlet water temperature sensor is greater than or equal to a set temperature difference, the master controller increases the opening degree of the flow control valve.

According to the present invention having such a configuration, there is an advantage that the heat exchange efficiency is improved.

Hereinafter, with reference to Figure 2 attached to the configuration of the duct-type fan coil unit employing a preferred embodiment of the present invention.

2 is a state diagram of the installation of the fan coil unit according to the present invention.

As shown in the figure, the fan coil unit is installed outside the interior space (I) requiring air conditioning to serve to supply heat-exchanged air to the interior space (I), the inside of the duct (D) It is connected in communication with the interior space.

A damper P is provided at one inner side of the duct. The damper (P) is to allow the air flowing through the duct (D) to selectively enter the indoor space (I), the number corresponding to the number of the indoor space (I) is provided.

In addition, the indoor space I is provided with a remote controller R for manipulating the operation of the fan coil unit 100.

Therefore, as the user manipulates the remote controller R, the damper P selectively opens the duct D, and the air discharged from the fan coil unit 100 is supplied to the indoor space I.

The fan coil unit 100 has a control box 102 for controlling the operation of the fan coil unit 100, the control box 102 is electrically connected to the master controller 180 to be described below. Connected.

Hereinafter, the configuration of the fan coil unit will be described with reference to FIG. 3. 3 is a schematic view showing the configuration of a fan coil unit according to the present invention.

As shown in the figure, the fan coil unit 100 is operated by the user's remote control (R) operation, has a low rectangular parallelepiped shape.

In addition, the right side of the fan coil unit 100 sucks indoor air, and the left side discharges heat-exchanged air into the room.

Therefore, an inlet (not shown) for introducing air into the case 110 is formed on the right side of the case 110 forming the exterior of the fan coil unit 100, and a discharge hole is provided on the left side of the case 110. 112 is formed perforated.

The discharge port is provided with a duct connector 114 so that a duct (not shown) for guiding the heat-exchanged air to move to the room can be connected.

The inner space of the case 110 is shielded by the upper panel 116, and the filter 120 is provided in the inner right space of the case 110. The filter 120 is configured to filter foreign matter contained in the air introduced into the fan coil unit 100 through the suction port, and has a size slightly smaller than the right side surface of the case 110.

The heat exchanger 130 is provided on the left side of the filter 120. The heat exchanger 130 is configured to circulate hot water or cold water to exchange heat and water introduced into the suction port, and has an overall rectangular parallelepiped shape and is installed upright.

An inlet pipe 132 is provided at the front end of the heat exchanger 130 to guide the hot water or the cold water into the heat exchanger 130, and the heat exchanger 130 is spaced to the right side of the inlet pipe 132. A water outlet pipe 134 through which water exchanged with air is discharged through the inside is provided.

The inlet pipe 132 and the outlet pipe 134 is configured to communicate with each other, the inlet pipe 132 is connected to the flow control valve 200.

The flow control valve 200 is for selectively controlling the flow rate flowing into the heat exchanger 130, it is interlocked with the temperature sensor 160 to be described in detail below.

The refrigerator 220 and the boiler 240 are provided between the flow control valve 200 and the water discharge pipe 134. The refrigerator 220 and the boiler 240 are connected to a supply pipe 250, and the supply pipe 250 is provided with a supply shutoff valve 252.

Therefore, the cold or hot water discharged from the refrigerator 220 or the boiler 240 flows along the supply pipe 250, and after the flow rate is controlled by the flow control valve 200, the inlet pipe 132. Through the heat exchanger 130 is supplied.

A recovery pipe 260 is provided between the water discharge pipe 134, the refrigerator 220, and the boiler 240, and the recovery pipe 260 is provided with a plurality of recovery blocking valves 262.

That is, one recovery shutoff valve 262 is provided at the inlet side of the air conditioner and the boiler 240, and the fan coil unit 100 is operated in the cooling or heating mode. One blocks the flow of water.

Blowing means 140 is provided on the left side of the heat exchanger (130). The blowing means 140 is a configuration for forcibly blowing the heat-exchanged air into the room by generating an air flow.

To this end, the blowing means 140 is a motor 142 for generating rotational power when power is applied, a blowing fan 144 for generating wind power by receiving rotational power from the motor 142, and the blowing fan ( 144 comprises a fan housing 146 for guiding the flow direction of the generated air flow.

The motor 142 is fixedly coupled to the fan housing 146, the blowing fan 144 is fixed in a rotatable state without interference inside the fan housing 146.

The tip of the fan housing 146 has an opening and is connected to communicate with the discharge port.

Therefore, the air forced by the blowing fan 144 toward the outer circumferential surface may move along the inner circumferential surface of the fan housing 146 and be discharged to the outside of the fan coil unit 100 through the discharge port.

The control box 102 is provided in front of the blowing means 140. The control box 102 controls the operation of the motor 142 and is electrically connected to the master controller 180 to be described below to receive various control signals from the master controller 180.

On the other hand, the fan coil unit 100 is configured to selectively control the opening degree of the flow control valve 200 according to the temperature of the heat-exchanged air and the temperature difference between the water passing through the inlet pipe 132 and the outlet pipe 134. do.

To this end, the fan coil unit 100 is provided with a temperature sensor 160 for measuring the temperature of one side of the heat exchanger (130).

More specifically, the temperature sensor 160 is fixed to the left side of the heat exchanger 130, the air temperature sensor 162 for measuring the temperature of the air heat exchanged with cold or hot water, and the heat exchanger 130 Inlet temperature sensor 164 for measuring the incoming water temperature, and the outlet water temperature sensor 166 for measuring the water temperature flowing through the heat exchanger 130 is configured to include.

In addition, one side of the fan coil unit 100 is further provided with a master controller 180 for controlling the opening degree of the flow control valve 200 by comparing the temperature value measured by the temperature sensor 160 with the set temperature. .

In more detail, the master controller 180 is provided outside the indoor space I to receive the measured temperature value of the temperature sensor 160 and the control box 102 provides a control signal from the master controller 180. It receives and controls the operation of the fan coil unit 100.

That is, the master controller 180 is measured by the temperature sensor 160 as the water introduced into the heat exchanger 130 changes to hot or cold water when the fan coil unit 100 is operated to cool or heat. By comparing the measured value with the user's set temperature, the flow control valve 200, the damper P, and the motor 142 are controlled.

Hereinafter, the operation of the fan coil unit 100 configured as described above in operation in the summer cooling mode will be described.

First, when the fan coil unit 100 is operated in a cooling mode and the user sets 23 ° C. to a set temperature using the remote controller R, the boiler 240 is stopped and only the refrigerator 220 is operated. Done.

In addition, the recovery blocking valve 262 located on the right side of the recovery pipe 260 is shielded, and the recovery blocking valve 262 located on the left side is opened, and the supply blocking valve 252 located on the right side of the supply pipe 250 is opened. Is shielded, and the supply cutoff valve 252 located on the left side is opened.

In addition, the motor 142 may generate rotational power to help the blowing fan 144 to generate wind power, and the wind power may move along the inner circumferential surface of the fan housing 146 to be discharged into the room through a discharge port. Done.

In this state, when the fan coil unit 100 and the refrigerator 220 are operated, the refrigerator 220 discharges cold water and passes the flow control valve 200 to exchange heat through the inlet pipe 132. 130) It is supplied to the inside.

The cold water supplied into the heat exchanger 130 is heated by heat exchange with the indoor air introduced into the case 110 through the suction port while passing through the heat exchanger 130.

The warmed water is circulated while flowing into the freezer 220 through the water outlet pipe 134 and the recovery pipe 260.

At this time, the air temperature sensor 162 passes through the heat exchanger 130 to measure the temperature of the air heat-exchanged with the cold water is sent to the master controller 180.

At the same time, the water inlet temperature sensor 164 and the water outlet temperature sensor 166 measure the temperature of the water flowing into the heat exchanger 130 and the temperature of the water that flows out of the heat exchanger 130 into the master controller 180. Will be sent to.

The master controller 180 adjusts the opening degree of the flow control valve 200 by comparing the measured value provided from the temperature sensor 160 with a set value.

More specifically, when the measured temperature measured by the air temperature sensor 162 is 25 ° C., which is 23 ° C. or higher, the opening degree of the flow control valve 200 is increased to allow more cold water to pass through the heat exchanger 130. The cooling efficiency of the fan coil unit 100 is increased.

In addition, when the difference between the respective temperatures measured by the water inlet temperature sensor 164 and the water outlet temperature sensor 166 is greater than or equal to a set temperature difference, the master controller 180 increases the opening degree of the flow control valve 200.

More specifically, assuming that the set temperature difference is 15 ° C., and the difference between the temperature measured by the inlet temperature sensor 164 and the outlet water temperature sensor 166 is 18 ° C., the valve controller adjusts the opening degree of the flow control valve 200. Increase the cooling efficiency of the fan coil unit 100 by increasing the amount of cold water via the heat exchanger (130).

On the contrary, when the measured temperature measured by the air temperature sensor 162 is less than the set temperature, or the difference between the respective temperatures measured by the inlet temperature sensor 164 and the outlet water temperature sensor 166 is less than the set temperature difference, the master The controller 180 maintains the opening degree of the flow control valve 200.

Of course, when the indoor temperature is equal to the set temperature by maintaining the opening degree of the flow control valve 200, the room temperature sensor generally provided in the remote control 102 detects this to operate the fan coil unit 100. Stopped.

At the same time, the master controller 180 also controls the operation of the damper P and the motor 142 by comparing the measured value provided from the temperature sensor 160 with a set value.

In more detail, when the measured temperature measured by the air temperature sensor 162 is 25 ° C. equal to or higher than the set temperature 23 ° C., the master controller 180 operates an indoor space I which is operated to perform air conditioning through the remote controller R. The damper (P) corresponding to) maintains the open state of the duct (D), and as the area of the indoor space requiring air conditioning increases, the master controller 180 increases the rotational speed of the motor 142. The control box 102 is controlled to increase.

However, when the indoor temperature measured by the indoor temperature sensor provided in the specific remote controller R among the plurality of indoor spaces I is less than or equal to the set temperature, the master controller 180 receives the measured value from the indoor temperature sensor and then the Through the control box 102 to reduce or shield the opening degree of the corresponding damper (P).

On the other hand, when the fan coil unit 100 is operated in the heating mode, and the user set the 23 ℃ to the set temperature using the remote control (R), the refrigerator 220 is stopped and only the boiler 240 It works.

In addition, the recovery blocking valve 262 located on the left side of the recovery pipe 260 is shielded, and the recovery blocking valve 262 located on the right side is opened, and the supply blocking valve 252 located on the left side of the supply pipe 250 is opened. Is shielded, and the supply cutoff valve 252 located on the right side is opened.

The motor 142 generates rotational power to help the blowing fan 144 generate wind power, and the wind power moves along the inner circumferential surface of the fan housing 146 to be discharged into the room through a discharge port. do.

When the fan coil unit 100 and the boiler 240 operate in this state, the boiler 240 discharges hot water and passes through the flow control valve 200 to exchange heat through the inlet pipe 132 ( 130) It is supplied to the inside.

The hot water supplied into the heat exchanger 130 is cooled by heat exchange with the indoor air introduced into the case 110 through the suction port while passing through the heat exchanger 130.

The cold water is circulated while flowing into the boiler 240 through the outlet pipe 134 and the recovery pipe 260.

At this time, the air temperature sensor 162 measures the temperature of the air heat-exchanged with the hot water while passing through the heat exchanger 130 and sends it to the master controller 180.

At the same time, the water inlet temperature sensor 164 and the water outlet temperature sensor 166 measure the temperature of the water flowing into the heat exchanger 130 and the temperature of the water that flows out of the heat exchanger 130 into the master controller 180. Will be sent to.

The master controller 180 adjusts the opening degree of the flow control valve 200 by comparing the measured value provided from the temperature sensor 160 with a set value.

More specifically, when the measured temperature measured by the air temperature sensor 162 is less than 23 ° C., which is a set temperature, the opening degree of the flow control valve 200 is increased to allow more hot water to pass through the heat exchanger 130. The heating efficiency of the fan coil unit 100 is increased.

In addition, when the difference between the respective temperatures measured by the water inlet temperature sensor 164 and the water outlet temperature sensor 166 is greater than or equal to a set temperature difference, the master controller 180 increases the opening degree of the flow control valve 200.

More specifically, assuming that the set temperature difference is 15 ° C., and the difference between the temperature measured by the inlet temperature sensor 164 and the outlet water temperature sensor 166 is 18 ° C., the master controller 180 controls the flow control valve 200. Increasing the opening degree of) increases the heating efficiency of the fan coil unit 100 by allowing more hot water to pass through the heat exchanger 130.

On the contrary, when the measured temperature measured by the air temperature sensor 162 is greater than or equal to the set temperature, or the difference between the respective temperatures measured by the inlet temperature sensor 164 and the outlet temperature sensor 166 is less than the set temperature difference, the master The controller 180 maintains the opening degree of the flow control valve 200.

Of course, if the room temperature is equal to the set temperature by maintaining the opening degree of the flow control valve 200, the room temperature sensor generally provided in the remote control (R) by providing this measurement temperature to the master controller 180, Operation of the damper P and the motor 142 is controlled.

In more detail, when the measured temperatures measured by the three indoor temperature sensors are all higher than the set temperature, the master controller 180 stops the motor 142 and at the same time shields the plurality of dampers (P).

If only the measured temperature measured by a specific indoor temperature sensor among the three indoor temperature sensors is higher than the set temperature, the master controller 180 shields only the damper corresponding to the indoor temperature sensor and reduces the rotational speed of the motor 142. do.

The scope of the present invention is not limited to the above-exemplified embodiments, and many other modifications based on the present invention will be possible to those skilled in the art within the above technical scope.

In the fan coil unit according to the present invention as described in detail above, the discharge air temperature or inlet / outlet temperature is measured by a plurality of temperature sensors, and the measured value is compared with a preset temperature value to determine the flow rate of the cold or hot water flowing into the heat exchanger. A master controller for selectively controlling is provided.

Therefore, the heat exchange efficiency of the heat exchanger is improved, there is an advantage that the air conditioning efficiency is increased.

In addition, since the user can quickly reach the set temperature set by the user there is an advantage that the product satisfaction is improved.

In addition, since the master controller, the flow control valve and a plurality of temperature sensors are interlocked with each other to automatically control the flow rate of the cold water or the hot water, there is an advantage of convenience of use.

Claims (6)

With heat exchanger for heat exchange of cold or hot water with indoor air, Blowing means for forcing air flow; A control box for controlling the operation of the blowing means; A temperature sensor measuring a temperature of one side of the heat exchanger; A flow control valve for selectively adjusting the flow rate flowing into the heat exchanger; A master controller for adjusting the opening degree of the flow control valve by comparing the measured temperature and the set temperature of the temperature sensor; It is configured to include a remote control for setting the set temperature, The master controller is installed on the outside of the indoor space fan coil unit, characterized in that electrically connected to the remote control and the control box. The method of claim 1, wherein the temperature sensor, An air temperature sensor for measuring the temperature of the air heat exchanged with hot or cold water in the heat exchanger, An inlet temperature sensor for measuring the water temperature flowing into the heat exchanger; Fan coil unit comprising a water extraction temperature sensor for measuring the water temperature flowing through the heat exchanger. The fan coil unit of claim 2, wherein when the hot water is supplied to the heat exchanger and the measured temperature measured by the air temperature sensor is less than a set temperature, the master controller increases the opening degree of the flow control valve. The fan coil unit of claim 2 or 3, wherein the master controller increases the opening degree of the flow control valve when the difference between the temperatures measured by the intake temperature sensor and the outlet temperature sensor is equal to or greater than a set temperature difference. The fan coil unit of claim 2, wherein the cold water is supplied to the heat exchanger, and the master controller increases the opening degree of the flow control valve when the measured temperature measured by the air temperature sensor is equal to or higher than a set temperature. The fan coil unit according to claim 2 or 5, wherein the master controller increases the opening degree of the flow control valve when the difference between the temperatures measured by the inlet temperature sensor and the outlet temperature sensor is greater than or equal to a set temperature difference.

Images