KR20080060862A - Air conditioner and method for controlling thereof - Google Patents

Abstract

An air conditioner and a method for controlling thereof are provided to adjust hot water flow and cold water flow that enters the fan coil unit according to load capacity of each indoor space. An air conditioner comprises a cold water storage(20), a hot water storage(10), a plurality of fan coil units, water pipes(40,42), a water pump(44), and a fan coil valve(50). The cold water storage stores cold water. The hot water storage stores hot water. The fan coil units purify indoor air by heat exchange. The water pipes guide the flow of water. The water pump is provided on one side of the water pipes to force water flow. The fan coil valve is provided on each fan coil unit, to control the water flow entering each fan coil unit.

Description

Air conditioner and control method

1 is a block diagram showing the configuration of a preferred embodiment of an air conditioner according to the present invention.

Figure 2 is a flow chart showing a preferred embodiment of the control method of the air conditioner according to the present invention.

Explanation of symbols on the main parts of the drawings

10. Hot water source 12. Hot water supply pipe

14. Hot water recovery pipe 20. Cold water heat source

22. Cold water supply pipe 24. Cold water recovery pipe

30. Fan coil unit 40. Supply piping

42. Return piping 50. Fan coil valve

60. Supply Basin Pipe 70. Recovery Basin Pipe

The present invention relates to an air conditioner, and more particularly, the water of any one of the cold water source and the hot water source is selectively supplied to the plurality of fan coil units, the amount of water introduced into each of the plurality of fan coil units is each room It relates to an air conditioner and a control method which are adjusted according to the load capacity.

An air conditioner is a device for cooling or heating air using a device called a fan coil unit, and is generally used in buildings such as hospitals, officetels, offices, hotels, and the like. That is, after passing a heat source water (for example, cold water or hot water) supplied from a freezer or a boiler to a fan coil unit provided with a heat exchanger coil therein, the surrounding air is cooled or heated, and then the cold or warm air is heated. By discharging to the indoor space, the room is cooled and heated.

However, in the conventional air conditioner, it is inconvenient to perform a work every time so that any one of a heat source (freezer or boiler) for supplying hot or cold water is selectively connected. That is, in order to cool the indoor space, a rework is performed so that the refrigerator is connected to the fan coil unit, and the cold water is configured to exchange heat while passing through the fan coil unit. On the contrary, in order to heat the indoor space, the refrigerator connected to the fan coil unit is removed, and the boiler is connected to the fan coil unit to configure the hot water to exchange heat while passing through the fan coil unit.

As described above, in the related art, a connection operation of a refrigerator or a boiler must be performed separately at each time of heating or cooling.

In addition, in the related art, cold water or hot water is uniformly supplied to a plurality of fan coil units. That is, it is made of a structure that can not control the cold water or hot water supplied to each indoor space. Therefore, there is a problem that it is difficult to properly cool or heat according to the actual load capacity required for each indoor space.

Accordingly, an object of the present invention is to solve the problems of the prior art as described above, and to provide an air conditioner configured to selectively connect the cold water heat source and the hot water heat source to the pacoil unit as needed.

Another object of the present invention is to provide a control method of an air conditioner in which the amount of hot or cold water introduced into a plurality of fan coil units is adjusted according to the load capacity of each indoor space.

Air conditioner according to the present invention for achieving the above object,

A cold water heat source for storing cold water; A hot water heat source in which hot water is stored; A plurality of fan coil units for purifying air in the indoor space by heat exchange; A water pipe for guiding water flow; A water pump provided at one side of the water pipe to force water flow; And a fan coil valve installed on each of the plurality of fan coil units to control an amount of water introduced into each fan coil unit.

The water pipe may include a supply pipe for guiding the water of the cold water heat source or the hot water heat source to be supplied to the plurality of fan coil units, and the water supplied to the plurality of fan coil units to be recovered back to the cold water heat source or the hot water heat source. It is characterized by having a configuration including a recovery pipe to guide.

One end of the supply pipe, a water supply valve for controlling any one of the cold water of the cold water heat source or the hot water of the hot water heat source flows into the supply pipe; One end of the recovery pipe, characterized in that the water recovery valve for controlling the cold water or hot water flowing through the recovery pipe is recovered to any one of the cold water heat source or hot water heat source.

The water supply valve and the water recovery valve is characterized in that the three-way valve capable of three-way water flow.

The fan coil valve is characterized in that the opening degree is controlled according to the load capacity required in the indoor space in which each fan coil unit is installed.

In addition, the control method of the air conditioner according to the present invention,

(a) operating the fan coil unit installed in the indoor space; (b) turning on a water pump to supply water to the fan coil unit; (c) determining whether the setting mode is a heating mode or a cooling mode; (d) opening either the hot water flow path or the cold water flow path; (e) measuring a load capacity of the indoor space in which each fan coil unit is installed; (f) adjusting the opening and opening degree of the fan coil valve for controlling the amount of water supplied to each fan coil unit; (g) determining whether all of the fan coil valves for controlling the amount of water supplied to each of the fan coil units are closed; (h) turning off the water pump to supply water to the fan coil unit; And so on.

In the step (f), the fan coil valve opening degree is adjusted according to the load capacity of each indoor space measured in the step (e).

As a result of the determination in step (g), when all of the fan coil valves are not closed, steps (e) and (f) are performed.

According to the air conditioner according to the present invention having such a configuration, there is an advantage that can be appropriately cooled or heated to meet the actual load of each indoor space.

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

Figure 1 schematically shows a preferred embodiment of the air conditioner according to the present invention.

As shown in the drawing, the air conditioner according to the present invention includes a hot water heat source 10 in which hot water is stored, a cold water heat source 20 in which cold water is stored, and a plurality of fans for purifying air in an indoor space by heat exchange. The coil unit 30, the water pipes 40 and 42 for guiding the water flow, the water pump 44 for forcing the water flow, and controls the amount of water flowing into each of the fan coil unit 30 Fan coil valve 50 or the like.

The hot water heat source 10 is a device for supplying high temperature water, made of a boiler or the like. In addition, the cold water heat source 20 is a device for supplying low-temperature cooled water, and consists of a refrigerator or the like.

On the left and right of the hot water source 10 is a hot water supply pipe 12 and hot water recovery pipe 14 for the supply and recovery of hot water is installed. That is, a hot water supply pipe 12 for guiding hot water supplied from the hot water heat source 10 is connected to the right side of the hot water heat source 10, and the hot water heat source 10 is provided on the left side of the hot water heat source 10. Hot water recovery pipe 14 for guiding the flow of hot water introduced into the is provided.

The hot water recovery pipe 14 is a pipe for guiding the hot water that has undergone heat exchange with the fan coil unit 30 to be recovered to the hot water heat source 10 again.

Cold water supply pipes 22 and cold water recovery pipes 24 for supplying and recovering cold water are installed on left and right sides of the cold water heat source 20. That is, the cold water supply pipe 22 for guiding the cold water supplied from the cold water heat source 20 is connected to the right side of the cold water heat source 20, and to the cold water heat source 20 on the left side of the cold water heat source 20. Cold water recovery pipe 24 for guiding the flow of cold water is provided.

The cold water collection pipe 24 is a pipe for guiding the cold water, which has undergone heat exchange while passing through the fan coil unit 30, to be recovered to the cold water heat source 20 again.

The fan coil unit 30 is generally installed in the interior of a building to heat or cool air in an indoor space. Therefore, although not shown, the fan coil unit 30 is provided with a heat exchanger having a heat exchange coil, a blower fan forcing the flow of air, and a motor for driving the blower fan. .

The fan coil unit 30 is provided with a plurality. That is, the fan coil unit 30 is installed one each in a plurality of indoor space. Therefore, the fan coil unit 30 is preferably provided with the same quantity as the number of indoor space.

FIG. 1 illustrates an example in which three fan coil units 30 are connected in parallel. That is, the fan coil unit 30 is composed of the first fan coil unit 32, the second fan coil unit 34, and the third fan coil unit 36 and the like, such three fan coil unit 30 Is installed in parallel to the water pipe (40, 42).

The water pipes 40 and 42 are pipes for selectively guiding cold water or hot water, and are composed of a supply pipe 40 for guiding water supply and a recovery pipe 42 for guiding water recovery.

The supply pipe 40 is a pipe that guides the water (cold water or hot water) of the cold water heat source 20 or the hot water heat source 10 to the plurality of fan coil units 30. One end of the supply pipe 40 is in communication with the hot water supply pipe 12 and the cold water supply pipe 22, the other end is connected to communicate with the supply branch pipe 60 to be described below.

A water supply valve 46 is installed at a connection portion between the supply pipe 40, the hot water supply pipe 12, and the cold water supply pipe 22. The water supply valve 46 is a valve for controlling any one of the cold water of the cold water heat source 20 or the hot water of the hot water heat source 10 flows into the supply pipe 40, the three-way water flow is possible It consists of a three-way valve.

Therefore, the water supply valve 46 selectively communicates with the hot water supply pipe 12 and any one of the cold water supply pipe 22 by the water supply valve 46. That is, when the air conditioner according to the present invention is used for heating, the water supply valve 46 allows the hot water supply pipe 12 and the supply pipe 40 to communicate with each other, on the contrary is used for cooling In this case, the cold water supply pipe 22 and the supply pipe 40 to communicate with each other.

Meanwhile, the water pump 44 is installed in the supply pipe 40. The water pump 44 is to force the hot water of the hot water source 10 or the cold water of the cold water source 20 to be supplied to the plurality of fan coil units 30 along the supply pipe 40, such as Since the configuration of the water pump 44 is the same as that of a general pump, a detailed description thereof will be omitted.

The recovery pipe 42 is supplied with water (cold water or hot water) from the cold water heat source 20 or the hot water heat source 10 to the plurality of fan coil units 30, and then again to the cold water heat source 20 or the hot water heat source. (10) to guide the return to the tube.

One end (the upper end in FIG. 1) of the recovery pipe 42 communicates with the hot water recovery pipe 14 and the cold water recovery pipe 24, and the other end (the lower end in FIG. 1) is a recovery branch pipe ( 70) is connected in communication with the installation.

A water recovery valve 48 is installed at the connection portion between the recovery pipe 42, the cold water recovery pipe 24, and the hot water recovery pipe 14. The water recovery valve 48 is a valve for controlling cold water or hot water recovered through the water recovery valve 48 to flow into the hot water recovery pipe 14 or the cold water recovery pipe 24. It consists of a three-way valve capable of water flow.

Therefore, the water recovery valve 48 selectively communicates with the hot water recovery pipe 14 and any one of the cold water recovery pipe 24 by the water recovery valve 48. That is, when the air conditioner according to the present invention is used for heating, the water recovery valve 48 allows the hot water recovery pipe 14 and the recovery pipe 42 to communicate with each other, on the contrary, used for cooling If the cold water recovery pipe 24 and the recovery pipe 42 is in communication with each other.

A supply branch pipe 60 is connected to the lower end of the supply pipe 40. The supply branch pipe 60 is to allow the hot water or cold water flowing through the supply pipe 40 to be divided into the plurality of fan coil units 30, respectively, and is connected to the first fan coil unit 32. A first supply branch pipe 62, a second supply branch pipe 64 connected to the second fan coil unit 34, a third supply branch pipe 66 connected to the third fan coil unit 36, and the like. Is done.

The fan coil valve 50 is installed in the supply branch pipe 60. The fan coil valve 50 includes a first valve 52 installed in the first supply branch pipe 62, a second valve 54 installed in the second supply branch pipe 64, and the third supply powder. It consists of a third valve 56 installed in the branch pipe (66).

Accordingly, the first valve 52 controls the amount of cold water or hot water flowing into the first fan coil unit 32, and the second valve 54 is connected to the second fan coil unit 34. The amount of cold water or hot water introduced is adjusted, and the third valve 56 adjusts the amount of cold or hot water introduced into the third fan coil unit 36.

The opening degree of the fan coil valve 50 is preferably adjusted automatically. That is, the opening degree is automatically controlled according to the load capacity required in the indoor space in which the fan coil unit 30 is installed.

In more detail, after the load capacity of the indoor space in which the first fan coil unit 32 is installed is measured, the opening and opening degree of the first valve 52 are adjusted according to the load capacity of the indoor space.

For example, when the air in the indoor space in which the first fan coil unit 32 is installed has a large difference from the set temperature, the first valve 52 is opened a lot, and the air is supplied through the first supply branch pipe 62. A relatively large amount of hot or cold water flows into the first fan coil unit 32. On the contrary, when the air in the indoor space in which the first fan coil unit 32 is installed does not have a large difference from the set temperature, the opening of the first valve 52 is less likely to occur, through the first supply branch pipe 62. A relatively small amount of hot or cold water flows into the first fan coil unit 32. When the air in the indoor space in which the first fan coil unit 32 is installed is equal to the set temperature, the first valve 52 is completely closed to block the flow of hot or cold water.

The second valve 54 and the third valve 56 are also controlled by the same process as the operation of the first valve 52 as described above.

The recovery branch pipe 70 is installed at the lower end (in FIG. 1) of the water recovery valve 48. The recovery branch pipe 70 guides the hot or cold water that has passed through the first fan coil unit 32, the second fan coil unit 34, and the third fan coil unit 36, respectively.

Accordingly, the recovery branch pipe 70 may include a first recovery branch pipe 72 connected to the left side of the first fan coil unit 32, and a second connection branch connected to the left side of the second fan coil unit 34. The second recovery branch pipe 74 and the third recovery branch pipe 76 is connected to the left side of the third fan coil unit 36. The left end of the first recovery branch pipe 72, the second recovery branch pipe 74 and the third recovery branch pipe 76 is connected to each other to contact the recovery pipe 42.

Figure 2 schematically shows a control method of the air conditioner according to the present invention having the configuration as described above. That is, a flowchart showing the operating state of the air conditioner according to the present invention is shown.

The control method of the air conditioner according to the present invention includes the step (a) of operating the plurality of fan coil units 30 installed in the indoor space (S100), so that water is supplied to the fan coil unit 30. (B) step (S110) of turning on the water pump 44, the step (c) of determining whether the setting mode is the heating mode or cooling mode (S120), any one of the hot water flow path or cold water flow path (D) opening the step (S130), and measuring the load capacity of the indoor space where each fan coil unit 30 is installed (e) step (S140), and each fan coil unit (30) (F) step (S150) of controlling the opening and opening degree of the fan coil valve 50 for controlling the amount of water supplied, and the fan coil valve for adjusting the amount of water supplied to each of the fan coil unit 30 (G) step (S160) of determining whether or not all of the (50) is closed, and the water pump 44 to supply water to the fan coil unit (30) It is executed by (h) step S170 or the like which turns off.

With reference to Figure 2 will be described in more detail. First, when power is applied from the outside, the fan coil unit 30 is operated. In other words, the first fan coil unit 32, the second fan coil unit 34 and the third fan coil unit 36 are operated in accordance with the power supply, this step is the step (a) (S100).

Then (b) step (S110) is performed, which is the process of operating the water pump 44, the hot water or cold water flows through the supply pipe (40).

Step (c) (S120) is a process of determining whether a user's setting is a heating mode or a cooling mode. That is, the heating mode is to be performed in the winter, the cooling mode is to be performed in the summer, it is determined that the set mode.

After the setting mode is determined by step (c) (S120), step (d) (S130) of opening either the hot water flow path or the cold water flow path is performed according to the result. That is, the hot water flow path is opened when the heating mode is performed in step (c) (S120) as described above, and the cold water flow path is opened when the cooling mode is performed.

The opening of the hot water flow path and the cold water flow path is made by the water supply valve 46 and the water recovery valve 48.

Specifically, the hot water flow path is a flow path for the hot water of the hot water heat source 10 to be supplied to the fan coil unit 30, the hot water supply pipe 12 and the supply pipe 40 and the recovery pipe 42, the supply portion It consists of a branch pipe (60), a recovery branch pipe (70), and the hot water collection pipe (14).

Therefore, in this case, the water supply valve 46 shields the cold water supply pipe 22 so that the hot water supply pipe 12 and the supply pipe 40 communicate with each other. The water recovery valve 48 shields the cold water recovery pipe 24 so that the recovery pipe 42 and the hot water recovery pipe 14 communicate with each other.

In this case, the hot water of the hot water heat source 10 is recovered again after passing through the fan coil unit 30 to form one cycle. At this time, the air in the indoor space is heated by the fan coil unit 30 to heat the interior.

On the other hand, the cold water flow path is a flow path for supplying the cold water from the cold water source 20 to the fan coil unit 30, the cold water supply pipe 22 and the supply pipe 40 and the recovery pipe 42, supply branch pipe 60, the recovery branch pipe 70, and the cold water collection pipe 24 and the like.

Therefore, in this case, the water supply valve 46 shields the hot water supply pipe 12 so that the cold water supply pipe 22 and the supply pipe 40 communicate with each other. The water recovery valve 48 shields the hot water recovery pipe 14 so that the recovery pipe 42 and the cold water recovery pipe 24 communicate with each other.

In this case, the cold water of the cold water heat source 20 is recovered again after passing through the fan coil unit 30 to form one cycle. At this time, the air in the indoor space is cooled by the fan coil unit 30 to perform indoor cooling.

The step (e) (S140) is a step of measuring the load capacity of the indoor space where each fan coil unit 30 is installed. That is, determining the load requirement of the indoor space by measuring the size or temperature of the space in which the first fan coil unit 32, the second fan coil unit 34, and the third fan coil unit 36 are installed. to be.

The step (f) (S150) is a step of adjusting the opening and opening degree of the fan coil valve 50 according to the load capacity of each indoor space calculated by the step (e) (S140). That is, when the load capacity of the indoor space in which the first fan coil unit 32 is installed is large, the first valve 52 is opened to open a lot of hot or cold water introduced into the first fan coil unit 32. Increase the amount, and if the load capacity of the indoor space in which the first fan coil unit 32 is installed is small, the first valve 52 is slightly opened to flow into the first fan coil unit 32. Reduce the amount of hot or cold water.

The second valve 54 and the third valve 56 are also operated on the same principle as the first valve 52. That is, the opening width of the second valve 54 and the third valve 56 varies depending on the load capacity of the indoor space in which the second fan coil unit 34 and the third fan coil unit 36 are installed. You lose.

In addition, the step (f) (S150) also controls the fan coil valve 50 is completely closed. That is, since the environment of the indoor space in which the first fan coil unit 32 is installed is the same as the setting environment, and when the load capacity is zero, the first valve 52 is completely shut off, so that the first fan coil unit is (32) Hot water or cold water inflow does not occur inside.

The step (g) (S160) is a step of determining whether all of the fan coil valve 50 is closed. That is, when the air conditioning for each indoor space is completed, the setting environment and the indoor environment are the same, so that the first valve 52, the second valve 54, and the third valve 56 are all closed. It is the step of determining the same state.

When it is confirmed that all of the fan coil valves 50 are closed by the step (g) (S160), the step (h) (S170) is performed next, the water pump 44 is stopped. When the water pump 44 is stopped, the cold coil or hot water is not supplied to the fan coil unit 30.

When at least one of the plurality of fan coil valves 50 is not completely closed in step (g), steps (e) (S140) and (f) (S150) continue again. Is performed.

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.

As described above, in the air conditioner according to the present invention, the supply pipe and the recovery pipe is provided with a water supply valve and a water recovery valve at the end so that any one of the hot water source and the cold water heat source is selectively connected to the supply pipe and the recovery pipe. To control. Therefore, according to the present invention, there is an advantage that the switching operation between the cooling mode and the heating mode is easy. That is, since only the flow path is simply changed by the water supply valve and the water recovery valve, which are three-way valves, there is an advantage in that the operation is more convenient than in the related art.

In addition, in the present invention, a fan coil valve is installed at each inlet of the plurality of fan coil units to adjust the amount of water supplied to the fan coil unit. The opening of the fan coil unit is automatically controlled according to the load capacity of each indoor space. Therefore, a large number of indoor spaces have the effect of enabling proper cooling or heating individually, thereby improving convenience of use.

Claims (8)

A cold water heat source for storing cold water; A hot water heat source in which hot water is stored; A plurality of fan coil units for purifying air in the indoor space by heat exchange; A water pipe for guiding water flow; A water pump provided at one side of the water pipe to force water flow; And a fan coil valve installed on each of the plurality of fan coil units to control an amount of water introduced into each fan coil unit. According to claim 1, wherein the water pipe, A supply pipe guiding the water of the cold water heat source or the hot water heat source to be supplied to the plurality of fan coil units; And a recovery pipe for guiding the water supplied to the plurality of fan coil units to be recovered to the cold water heat source or the hot water heat source. The water supply valve of claim 2, wherein one end of the supply pipe is provided with a water supply valve configured to control one of cold water of the cold water heat source and hot water of the hot water heat source to flow into the supply pipe; At one end of the recovery pipe, a water recovery valve for controlling the cold water or hot water flowing through the recovery pipe to be recovered to any one of the cold water source or hot water heat source is installed. The water supply valve and the water recovery valve of claim 3, Air control device characterized in that the three-way valve capable of three-way water flow. The method of claim 1, wherein the fan coil valve, The air conditioner, characterized in that the opening degree is controlled according to the load capacity required in each indoor space in which the fan coil unit is installed. (a) operating the fan coil unit installed in the indoor space; (b) turning on a water pump to supply water to the fan coil unit; (c) determining whether the setting mode is a heating mode or a cooling mode; (d) opening either the hot water flow path or the cold water flow path; (e) measuring a load capacity of the indoor space in which each fan coil unit is installed; (f) adjusting the opening and opening degree of the fan coil valve for controlling the amount of water supplied to each fan coil unit; (g) determining whether all of the fan coil valves for controlling the amount of water supplied to each of the fan coil units are closed; (H) turning off the water pump to supply water to the fan coil unit (off). The method of claim 6, wherein in step (f), And controlling the opening degree of each fan coil valve according to the load capacity of each indoor space measured in step (e). According to claim 6 or 7, wherein as a result of the determination in step (g), if all of the fan coil valve is not closed, the control of the air conditioner characterized in that the steps (e) and (f) is performed Way.

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