JP2002098344A - Air conditioner system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fan coil type air conditioner system which can perform heating and cooling operations of suitable temperature suitable for purposes of use even in an intermediate period or the summer and winter seasons. SOLUTION: In the fan coil type air conditioner system, cold and hot water is supplied to a heat exchanging coil through a cold and hot water supply amount control valve from cold and hot water supply forward piping to perform the heating and cooling operations by cold and hot air whose heat is exchanged by the heat exchanging coil A cold water supply pipe, a hot water supply pipe, a three-way valve for connecting the cold water supply pipe to the hot water supply pipe and the heat exchanging coil connected to the three-way valve are provided to perform a supplementary cooling and heating operations. The water supply pipe from the three-way valve is connected to a piping path between the cold and hot water supply amount control valve and the heat exchanging coil to adjust the temperature of cold and hot water supplied to the heat exchanging coil.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioning system of a fan coil type which performs cooling and heating by supplying cold and hot water to a heat exchange coil.

[0002]

2. Description of the Related Art A fan coil type air conditioning system has a supply pipe 3 for cold and hot water as shown in FIG.
02, a heat exchange coil 301, and a blower fan 303 as main components. During cooling, cold water is supplied to the heat exchange coil 301, and indoor air or fresh outside air is introduced to cool the heat exchange coil 3.
The air 304 cooled in step 01 is blown into the room to perform cooling, and at the time of heating, hot water is supplied to the heat exchange coil to perform heating by the same mechanism as described above and to adjust the state to a state suitable for the intended use. .

In this fan coil type air conditioning system, a two-pipe system has been generally used.

As shown in the system diagram of FIG. 3, the two-pipe system has an outgoing pipe 101 to which cold and hot water is supplied, a flow control valve 102 for adjusting the supply of cold and hot water, a heat exchange coil 103, It consisted of a pipe 104 and a blower fan 105 that promotes heat exchange and blows the hot and cold air into the room after the heat exchange.

[0005] In this two-pipe system, the temperature of air exchanged by the heat exchange coil 103 is adjusted by adjusting the amount of cold and hot water supplied and the amount of air blown by the blower fan 105. When the water was cold water, it was used for cooling, and when the water was warm water, it was used for heating.

[0006] For this reason, the two-pipe system is inexpensive in equipment costs, operation costs, and maintenance costs, but it is necessary to adjust the cooling and heating temperature to a room temperature suitable for the purpose of use in the middle period such as spring and autumn or in the summer and winter. It was impossible.

[0007] A four-pipe system that solves the above problems is:
As shown in the system diagram of FIG. 4, a cooling line 100 in which cold water is supplied from a supply pipe 101 and cools air with a heat exchange coil 103, and hot water is supplied from a supply pipe 201 and heats the air with a heat exchange coil 203. It is composed of two heating lines 200, adjusts the supply of cold water and hot water, mixes the generated cool air and warm air, blows the air into the room with the blower fan 105, and enables cooling and heating at a temperature suitable for the middle period. .

[0008] However, in this four-pipe system, equipment costs and construction costs are high, and since it is necessary to constantly supply cold and hot water, operating costs and maintenance costs also rise.
The total cost was significantly higher than a two-pipe system.

[0009]

In the conventional fan coil system based on the two-tube system, the water supplied to the heat exchange coil is either cold water or hot water, and cooling and heating at a temperature suitable for the intermediate period is impossible. There was a problem.

[0010] In addition, in the four-pipe system which can compensate for the above-mentioned problem and can perform cooling and heating even in the interim period, there is a problem that the cost of equipment and operation is greatly increased.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned drawbacks and provides a fan coil capable of adjusting a cooling / heating temperature in a room suitable for a purpose of use even in an intermediate period or a summer / winter period without a significant increase in cost. It is an object of the present invention to provide a system of air conditioning.

[0012]

According to a first aspect of the present invention, cold and hot water is supplied from a cold and hot water supply pipe to a main heat exchange coil through a cold and hot water supply amount control valve, and heat exchange is performed by the main heat exchange coil. An air conditioning system of a fan coil system for performing cooling and heating with the supplied cold and hot air, comprising: a cold water supply pipe, a hot water supply pipe, a three-way valve connecting the cold water supply pipe and the hot water supply pipe, and the three-way valve. An air conditioning system characterized by comprising a sub heat exchange coil connected from a valve to assist cooling and heating.

According to a second aspect of the present invention, cold and hot water is supplied from a cold and hot water supply pipe to a main heat exchange coil via a cold and hot water supply amount control valve, and is cooled and heated by cold and hot air heat exchanged by the main heat exchange coil. A chilled water supply pipe, a hot water supply pipe, and a three-way valve connecting the cold water supply pipe and the hot water supply pipe, wherein water from the three-way valve is provided. The air conditioning system is characterized in that a supply pipe is connected to a piping path between the cold / hot water supply amount control valve and the main heat exchange coil to adjust the temperature of the cold / hot water supplied to the main heat exchange coil.

According to a third aspect of the present invention, the water supplied to the cold water supply pipe and the hot water supply pipe is tap water or hot water supplied to a unit bath. 3. The air conditioning system according to item 2.

According to the air conditioning system of the present invention, cooling and heating in the summer and winter are performed by the main heat exchange coil, and the temperature is supplementarily adjusted by using the auxiliary heat exchange coil in the middle period, or the cold or hot water is used. Is supplied to the cold and hot water supplied to the main heat exchange coil to adjust the water temperature, so that cooling and heating at an intermediate temperature suitable for the interim period or the intended use can be performed by the fan coil method.

This system can be implemented by adding an auxiliary system to the main cooling / heating system, so that the increase in cost is small. Further, tap water and hot water supplied to the unit bath can be used, and omission of piping facilities and It can be used for effective use of water resources.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram of a two-coil system using a main heat exchange coil 3 and a sub heat exchange coil 10. As shown in FIG.

The hot and cold water supply pipe 1 is provided with a supply control valve 2
Is connected to the main heat exchange coil 3 to supply cold water or hot water to the main heat exchange coil 3.

Cooling is supplied when cold water is supplied to the main heat exchange coil 3, and heating is performed when hot water is supplied. The indoor air or outside air is adjusted to a set temperature by the amount of water supplied and the amount of air blown by the blower fan 6. At the time of cooling or heating, cooling and heating are performed using the main heat exchange coil 3.

When the operating temperature is set in the middle period, the auxiliary heat exchange coil 10 is used together in an auxiliary manner, so that the temperature can be adjusted to a temperature suitable for a season in which temperature control such as spring and autumn is difficult.

Cold water is supplied from the cold water supply pipe 7, and hot water is supplied from the hot water supply pipe 8. The three-way valve 9 controls the switching and supply of cold water and hot water. Supplied to

The main heat exchange coil 3 from the cold / hot water supply outgoing pipe 1
When the cooling operation is performed by supplying cold water to the cooling water, the hot water switched by the three-way valve 9 is supplied to the sub heat exchange coil 10 to generate warm air, and the cooling temperature is adjusted.

When hot water is supplied from the cold / hot water supply pipe 1 to the main heat exchange coil 3 and heating operation is performed, cold water switched by the three-way valve 9 is supplied to the sub heat exchange coil 10 to generate cool air. Then, the heating temperature can be adjusted.

The main heat exchange coil 3 from the cold / hot water supply pipe 1
The control of the water supplied to the sub heat exchange coil 10 is different depending on whether the water supplied to the water is cold water or hot water. Therefore, the cold / hot water is monitored by the water temperature sensor 5 and the three-way valve 9 is automatically operated. It is possible to switch between cold and hot water supply systems.

In addition, cold and hot water supply pipes 7 and 8
Both can be supplied only with cold or hot water as required.

In this two-coil system, the main heat exchange coil 3
The main air for cooling and heating, the temperature of which has been adjusted in the above, and the air whose temperature has been adjusted by the auxiliary heat exchange coil 10 are mixed to adjust the temperature to the set temperature, and the air is blown into the room by the blower fan 6 to cool and heat.

The cold or hot water supplied to the cold water supply pipe 7 or the hot water supply pipe 8 can be tap water or hot water supplied to a unit bath which is often used in hotels and the like. When used, it is not necessary to heat the water, so that the operation cost can be reduced and the water resources can be used effectively.

Further, since the water that has been heat-exchanged by the heat exchange coil 10 is drained, it can be intermittently supplied to the heat exchange coil 10 and resources can be saved.

FIG. 2 shows a case where only the main heat exchange coil 23 is used.
FIG. 1 shows a system diagram of a coil system.

The cold / hot water supply pipe 21 is connected to a main heat exchange coil 23 via a supply amount control valve 22, and supplies cold water or hot water to the main heat exchange coil 23.

Cooling and heating in the summer and winter are performed in the same manner as in the above-described two-coil system.
This is performed by supplying cold water or hot water from Step 1.

At the time of setting the use temperature in the intermediate period, the cooling and heating temperature can be adjusted by using the following auxiliary means together.

Cold water is supplied from the cold water supply pipe 27, and hot water is supplied from the hot water supply pipe 28. The three-way valve 9 controls the switching and supply of the cold water and the hot water. It is.

The supply pipe 30 is connected to a pipe path 24 between the cold / hot water supply amount control valve 22 and the main heat exchange coil 23, and the cold or hot water is mixed with the cold / hot water from the cold / hot water supply pipe 21 and the main pipe is mixed. The heat is supplied to the heat exchange coil 23.

When cold water is supplied from the cold / hot water supply pipe 21 to the main heat exchange coil 23 and the cooling operation is being performed, the hot water switched by the three-way valve 29 is supplied to the cold water, and the water whose temperature has been adjusted is mainly supplied to the cold water. The cooling temperature supplied to the heat exchange coil 23 is adjusted.

When hot water is supplied from the cold / hot water supply pipe 21 to the main heat exchange coil 23 and heating operation is performed,
The cold water switched by the three-way valve 29 is supplied to the hot water, and the water whose temperature has been adjusted is supplied to the main heat exchange coil 23 so that the heating temperature can be adjusted.

In the one-coil system, cold or hot water supplied from the cold / hot water supply pipe 21 to the main heat exchange coil 23 is supplied with cold water from the cold water supply pipe 27 or hot water from the hot water supply pipe 28 to supply the main water. The temperature of the water supplied to the heat exchange coil 23 is adjusted, and the temperature of the air exchanged with heat is adjusted.

The control of the water supplied to the supply pipe 30 differs depending on whether the water supplied from the cold / hot water supply pipe 21 to the main heat exchange coil 3 is cold water or hot water.
In 5, monitor the cold / hot water and automatically operate the three-way valve 9,
It is possible to switch between cold and hot water supply systems.

Also in this method, only cold water or hot water can be supplied to both the supply pipes 27 and 28 as needed.

The water temperature can be finely adjusted by connecting the bypass valve 37 to the cold / hot water supply amount control valve 22, draining the water from the bypass pipe 36, and finely adjusting the supply flow of the cold / hot water.

In this one-coil type as well, the cold or hot water supplied to the cold water supply pipe 27 and the hot water supply pipe 28 can use tap water or hot water supplied to a unit bath often used in hotels and the like. it can.

Further, the cold or hot water after the heat exchange is branched off from the three-way valve 32 and can be reused for cooling or warming.

Further, when water subjected to heat exchange in the heat exchange coil 23 is drained, water can be intermittently supplied to the heat exchange coil 23, thereby saving resources.

In this one-coil type system, cooling and heating in the interim period can be performed by adding a cold water supply pipe and a hot water supply pipe to the conventional two-pipe type system, and the equipment cost and the construction cost are greatly increased. Without this, by effectively using water as described above, it is possible to reduce operating costs and suppress an increase in total cost.

As described above, in addition to the main heat exchange coil system for cooling and heating in the summer and winter seasons, a two-coil type system for supplementarily adjusting the air temperature using the auxiliary heat exchange coil system,
Or, like a one-coil system that adjusts the water temperature by supplying cold or hot water to the water supplied to the main heat exchange coil,
The new system based on the fan coil system makes it possible to heat and cool the room temperature suitable for the intended use even in the summer and winter seasons.

Further, in this system, the water of the unit bath used frequently in hotels and the like can be used. Needless to say, surplus water in the hot water supply equipment other than the unit bath can be used, which can save resources and reduce operating costs.

Further, in the one-coil system, the conventional two-
By adding cold water and hot water supply pipes to the tubular system, cooling and heating in the interim period can be performed, and an increase in equipment costs can be suppressed.

[0049]

As described above, according to the air-conditioning system of the present invention, cooling and heating at a temperature suitable for the intended use can be performed even in the middle period or the summer / winter period by the fan coil system, in which the temperature cannot be adjusted conventionally. It can be carried out.

In the one-coil system, cooling and heating can be performed in the interim period by providing supply piping for cold water and hot water. In addition, water can be used effectively, such as by using the water in a unit bath, to save resources. The operating cost can be reduced and the increase in the total cost can be suppressed.

[Brief description of the drawings]

FIG. 1 is a diagram of a two-coil air conditioning system according to an embodiment of the present invention.

FIG. 2 is a diagram of a one-coil air conditioning system according to an embodiment of the present invention.

FIG. 3 is a diagram of a conventional two-tube fan coil type air conditioning system.

FIG. 4 is a diagram of a conventional four-tube fan coil type air conditioning system.

FIG. 5 is a schematic structural view of a fan coil type air conditioner.

[Explanation of symbols]

 1,21 ... cold and hot water supply pipe 2,22 ... supply amount control valve 3,23 ... main heat exchange coil 4,34 ... return pipe 5,25 ... water temperature sensor 6,26 ... blast fan 7 , 8, 27, 28 ... cold and hot water supply pipes 9, 29, 32 ... three-way valve 10 ... slave heat exchange coil 11, 31 ... drain pipe 24, 30 ... water supply pipe 36 ... bypass pipe 37 ... Bypass valve

Claims (3)

[Claims] 1. A fan coil system in which cold and hot water is supplied from a cold and hot water supply pipe to a main heat exchange coil via a cold and hot water supply amount control valve, and the hot and cold air exchanged by the main heat exchange coil performs cooling and heating. Air conditioning system,
A cooling water supply pipe, a hot water supply pipe, a three-way valve connecting the cold water supply pipe and the hot water supply pipe, and a sub heat exchange coil connected from the three-way valve are provided to assist cooling and heating. Air conditioning system. 2. A fan coil system in which cold and hot water is supplied from a cold and hot water supply pipe to a main heat exchange coil via a cold and hot water supply amount control valve, and the hot and cold air exchanged by the main heat exchange coil performs cooling and heating. Air conditioning system,
A cold water supply pipe, a hot water supply pipe, and a three-way valve connecting the cold water supply pipe and the hot water supply pipe; and a water supply pipe from the three-way valve is provided with the cold / hot water supply amount control valve and the main water supply pipe. An air conditioning system connected to a piping path between heat exchange coils and adjusting the temperature of cold and hot water supplied to the main heat exchange coil. 3. The air conditioning system according to claim 1, wherein tap water or hot water supplied to a unit bath is used as the water supplied to the cold water supply pipe and the hot water supply pipe. .