KR100956501B1 - Indoor unit of Air conditioning system cooled by water - Google Patents

Abstract

The indoor unit of the water-cooled air conditioning system according to the present invention includes a plurality of compressors in which refrigerant is compressed; A double tube condenser installed to bend and extend the double tube in the same shape as the side circumference of the indoor unit so that the compressed refrigerant is condensed by contact with the cooling water; And an evaporator which evaporates to supply cold air after the condensed refrigerant is expanded.

According to the present invention, there is no need for a separate space for installation of the double pipe condenser used for the indoor unit of the water-cooled air conditioning system, and furthermore, there is an advantage that the internal space of the indoor unit can be used more efficiently.

In addition, since the double pipe condenser can be installed simply and conveniently, the operator has the advantage that the installation of the double pipe condenser is terminated simply by placing the double pipe condenser along the outer periphery of the lower panel which is conveniently set in advance.

Water-cooled, air conditioning, bottom panel, double pipe condenser

Description

Indoor unit of Air conditioning system cooled by water

1 is a perspective view of a building to which the water-cooled air conditioning system of the present invention is applied.

2 is a diagram illustrating an internal configuration of each floor of a building.

3 is a system configuration diagram of a water-cooled air conditioning system according to the present invention.

4 is a perspective view of a water-cooled air conditioning system indoor unit.

5 is an exploded perspective view of the indoor unit.

6 is a cross-sectional view taken along line II ′ of FIG. 5.

7 is a change diagram of the cooling load according to the operation state of the compressor.

8 is a block diagram of a water-cooled air conditioning system according to the present invention.

<Explanation of symbols for the main parts of the drawings>

44: double pipe condenser 441: cooling water inlet pipe

442: coolant outlet pipe 443, 444: header

445 double pipe

The present invention relates to a water-cooled air conditioning system, and in detail, by improving the shape and structure of the condenser in which the heat exchange of the cooling water and the refrigerant is performed in the indoor unit of the water-cooled air conditioning system, the space arrangement of the indoor unit becomes efficient, and the size of the condenser is controlled. The indoor unit of this free water-cooled air conditioning system.

In general, the water-cooled air conditioning system has higher efficiency and lower noise at the indoor unit than the air-cooled method in which the refrigerant is condensed by air.

In addition, when the above-described water-cooled air conditioning system is applied to a large building, the air pipe or the refrigerant pipe is not exposed to the outside, resulting in a beautiful building appearance, convenient maintenance, and no airtight refrigerant pipe is required. This higher advantage can be obtained.

On the other hand, in recent years, there are many large skyscrapers in large cities, and these skyscrapers cannot create open windows on each floor due to stability problems and high wind speed problems. Therefore, it is common to perform centralized heating and cooling in such a large building.

As a method of performing centralized heating and cooling for a large building under such a background, the above-described water-cooled air conditioning system has been proposed as one method.

The water-cooled air conditioning system includes an indoor unit and an outdoor unit, respectively. The outdoor unit is installed on the roof of a building to take the form of a cooling tower for cooling high temperature cooling water, and the indoor unit is installed on each floor of the building to supply cold coolant cooled in the outdoor unit to condense a refrigerant. do. In addition, the coolant used to heat exchange in the indoor unit is circulated again to form the cycle of cooling to the outdoor unit.

In addition, in the indoor unit, the refrigerant cooled by the cooling water forms one cycle of expansion in the expander, evaporation in the evaporator, and compression in the compressor. Of course, while evaporating in the evaporator to absorb the external heat to lower the temperature of the outside air. In the indoor unit, heat exchange is performed between the coolant and the coolant, and a double tube condenser in which the coolant and the coolant flow through the outer tube and the inner tube, respectively, is heat-exchanged by the contact surface of the inner tube.

On the other hand, the double tube condenser is bent a plurality of times is generally installed intensively at a predetermined position on the lower side of the indoor unit. In other words, the long length double pipe condenser, which is set to fit the cooling capacity, is bent and intensively installed in a narrow area of the indoor unit.

Due to this structure, there is a disadvantage in that the indoor unit needs to provide a separate space for installing the double pipe condenser. If the total length of the double pipe condenser required is long, a separate installation space is required separately. As such, when the installation space of the double pipe condenser is increased, it is natural that the space for installing other components of the indoor unit is also reduced.

The present invention is proposed in order to solve the above problems, and it is an object of the present invention to propose an indoor unit of a water-cooled air conditioning system that can utilize the internal space of the indoor unit intensively because the installation space of the double tube condenser is not widely required.

In addition, since the arrangement of the double tube condenser is convenient, the manufacturing process of the indoor unit is convenient, and an object of the present invention is to propose an indoor unit of the water-cooled air conditioning system that can set the length of the double tube condenser relatively long.

In the indoor unit of the water-cooled air conditioning system according to the present invention for achieving the above object, in the indoor unit of the water-cooled air-conditioning system in which the cooling water and the refrigerant is condensed by the contact method by the double tube condenser, the double tube condenser in the indoor unit It characterized in that it comprises a double pipe formed by bending the outer circumference of the lower side.

According to another aspect of the present invention, an indoor unit of a water-cooled air conditioning system includes a plurality of compressors in which refrigerant is compressed; A double tube condenser installed to bend and extend the double tube in the same shape as the side circumference of the indoor unit so that the compressed refrigerant is condensed by contact with the cooling water; And an evaporator which evaporates to supply cold air after the condensed refrigerant is expanded.

According to the present invention, the indoor unit of the water-cooled air conditioning system can effectively utilize the internal space of the indoor unit, and the double pipe condenser can be easily installed.

Hereinafter, with reference to the drawings will be described in detail a specific embodiment of the present invention. However, the spirit of the present invention is not limited to the embodiments presented, and those skilled in the art who understand the spirit of the present invention may add, change, delete, or add other embodiments within the scope of the same idea. Although it may be easily proposed, this will also be included within the scope of the present invention.

1 is a perspective view of a building to which a water-cooled air conditioning system of the present invention is applied, and FIG. 2 is a diagram illustrating an internal configuration of each floor of a building.

1 and 2, the water-cooled air conditioning system of the present invention includes a building 1, a cooling tower 2 as an outdoor unit placed on the roof of a building, a water-cooled indoor unit 3 placed on each floor of the building, and the cooling tower. (2) a cooling water pipe (4) connecting the water-cooled indoor unit (3), an indoor duct (5) for allowing air cooled by the water-cooled indoor unit (3) to flow into each compartment of the room, and A diffuser 6 is provided at the end of the indoor duct 5 to diffuse widely into the indoor space.

The cooling tower 2 is not a general open cooling tower, but has a structure of a closed cooling tower in which cooling water is cooled by an individual complete air conditioning system in a state where the cooling water is not exposed to the outside. Therefore, it is possible to obtain the advantage that the contamination of the cooling water is prevented and the system efficiency of the air conditioning system is enhanced.

3 is a system configuration diagram of a water-cooled air conditioning system according to the present invention.

Referring to Figure 3 will be described in detail the operation to the operation of the water-cooled air conditioning system of the present invention. The cooling water cooled in the cooling tower 2 is pressurized by the pump 9 and guided to each floor of the building through the supply passage 7. The supply passage 7 is connected to the water-cooled indoor unit 3 on each floor, and a proportional control flow control valve 11 is inserted into each connection passage. The proportional control flow rate control valve 11 allows the amount of cooling water flowing into the water-cooled indoor unit 3 from the supply passage 7 to be linearly controlled. In this way, by supplying the amount of cooling water by the proportional control flow control valve 11, the amount of cooling water supplied to the water-cooled indoor unit 3 can be actively controlled in accordance with the operating state of the indoor unit.

In addition, the air cooled by the water-cooled indoor unit (3) is guided to each compartment of the room through the indoor duct (5), a plurality of dampers (10) formed on the indoor duct (5) is introduced into a specific space Allow the amount of cold to be controlled. A diffuser 6 is installed at the end of the indoor duct 5 to allow cold air to spread to the indoor space.

In addition, the cooling water heated by heat exchange with the refrigerant in the water-cooled indoor unit 3 is discharged to the circulation flow path 8 and flows into the cooling tower 2 again and circulates, and after cooling by the cooling tower 2, It is supplied again through the supply passage (7).

On the other hand, the indoor control unit 12 to control the water-cooled indoor unit (3) is formed on each floor of the building, the indoor control unit 12 is connected to the central control unit 13 of the building to transmit and receive signals. Therefore, the user adjusts the indoor control unit 12 to adjust the driving state of the water-cooled indoor unit 3, and the indoor control unit 12 transmits the operating state of the water-cooled indoor unit 3 to the central control unit 13. To pass.

In addition, the central control unit 13 collects the operating state of the water-cooled indoor unit 3 operated in each floor, so that the air conditioning system for the building as a whole is controlled. For example, when the water-cooled indoor unit 3 of each floor is fully operated, the operation state of the cooling tower 2 can be controlled so that the cooling tower 2 may operate in full.

In addition, the indoor control unit 12 allows the proportional control flow control valve 11 to be controlled according to the operating state of the water-cooled indoor unit 3. For example, in the case where the cooling load of the water-cooled indoor unit 3 is large, the proportional control flow rate control valve 11 has a large opening so that more cooling water flows into the water-cooled indoor unit 3, and the cooling load is reduced. If it is small, the opening degree is small so that a small amount of cooling water flows in.

On the other hand, each floor of the building may be a ventilation device that can directly enter the outside air, and by installing a total heat exchanger at the inlet / outlet end of the ventilator, it is also possible to allow the outside air to flow directly.

Hereinafter, the configuration and operation of the water-cooled indoor unit 3 will be described in detail.

4 is a perspective view of the indoor unit, Figure 5 is an exploded perspective view of the indoor unit.

4 and 5, the indoor unit 3 according to the present invention is a hexahedron having a front panel 33, an upper panel 36, a side panel 35, a lower panel 34, and a rear panel 60. Each is formed. In addition, the front panel 33 is formed with an inlet 31 through which outside air flows into the outside air, and the upper panel 36 has a duct connecting portion 32 formed therein, through which the cooled air passes through a predetermined duct. To be discharged into each space.

In detail, the configuration and operation of the indoor unit 3 will be described.

On the lower panel 34 of the indoor unit 3, a plurality of compressors 41, 42, 43 and a double tube condenser 44 are placed.

In detail, the compressor includes a first constant speed compressor 41 and a second constant speed compressor 43 that operate at a constant speed, and an inverter compressor 42 having a variable operating frequency of the compressor to vary the amount of refrigerant.

In detail, the double tube condenser 44 is composed of an outer tube and an inner tube, and the coolant flows in the inner tube, and the coolant flows in the outer tube, thereby performing heat exchange between the coolant and the refrigerant at the contact surface of the inner tube. In particular, the double tube condenser 44 is formed by turning along the outer periphery of the lower panel 34 of the rectangular indoor unit. Since the double tube condenser 44 is formed in a wide space along the outer circumference of the lower panel 34, it is not necessary to secure a space in which the double tube condenser 44 is separately installed inside the indoor unit. In addition, there is an advantage in that the double pipe condenser 44 is positioned in accordance with the outer circumferential surface of the lower panel 34 without the worker's effort to find a specific installation position when the double pipe condenser 44 is installed. Furthermore, since the double tube condenser 44 can be installed to approach other external panels, since the refrigerant flowing in the exterior can also be performed by external air, the efficiency of heat exchange can be enhanced.

In addition, an evaporator 45 is disposed at an approximately center portion of the indoor unit 3 to cool the air introduced through the suction port 31 and the suction passage 40. In addition, in order to smoothly drain the condensed water generated while the refrigerant is evaporated in the evaporator 45, a drain pan 46 is disposed below the evaporator 45. And, in order to guide the condensed water drained from the drain pan 46 to the outside of the indoor unit 3, the side panel 35 is formed with a drain portion 39 in communication with a portion of the drain pan 46, The cooling water inflow pipe 37 and the cooling water outflow pipe 38 which let cooling water inflow and outflow to the indoor unit 3 are formed below.

In addition, a motor 47 and a blower fan 48 connected to the motor 47 are formed above the evaporator 45 to force the air to flow inside the indoor unit 3. In addition, the air discharged from the blower fan 48 is blown to each indoor space via the duct connecting portion 32 of the upper panel 36.

On the other hand, the present invention has one feature in the arrangement and shape of the double tube condenser 44, the following describes the arrangement and shape of the double tube condenser 44 in detail.

The double pipe condenser 44 has two long pipes installed around the outer circumference of the lower panel 34, and a header is connected to an end of each double pipe 445 pipe. The header includes an inlet header 443 and an outlet header 444 into which the coolant is introduced, and the headers 443 and 444 are connected to the coolant inlet pipe 441 and the coolant outlet pipe 442.

The coolant inlet pipe 447 and the coolant outlet pipe 446 are respectively joined to the outer tube of the double pipe at the end of the double pipe 445. Of course, the inflow side of the refrigerant becomes the outflow side of the cooling water and the outflow side of the refrigerant becomes the inflow side of the cooling water in order to allow the refrigerant and the cooling water to flow to face each other.

As described above, since the plurality of double pipes 445 are bent along the outer periphery of the lower panel 34, the length of the double pipes 445 for condensation is increased depending on the cooling load. Inside the indoor unit for the double pipe 445 is installed can be obtained without the need for separate space consumption. For example, if the length of the double pipe is longer, the double pipe may be installed longer by bending a plurality of times, or one double pipe may be stacked. This embodiment illustrates that one double tube 445 is rolled twice and used. FIG. 6 is a cross-sectional view taken along line II ′ of FIG. 5, and referring to FIG. 6, it will be clearly understood that the double pipe 445 is rolled up and used a plurality of times.

On the other hand, when the double pipe 445 is sufficient to be bent only a few times to be used, the coolant inlet pipe 441 and the coolant outlet pipe without the need for the coolant to be distributed to the double pipe by the header (443, 444) ( It is obvious that 442 may be used directly connected to the double tube 445.

The operation of the indoor unit 3 will be described with reference to the above configuration. First, the refrigerant is condensed by the double tube condenser 44. Cooling water flows through the inner tube of the double tube condenser 44, and a coolant flows through the outer tube condenser 44 to condense the refrigerant by heat exchange between the refrigerant and the cooling water. After the refrigerant is condensed in this way, it is expanded through an expansion valve (not shown), and then the heat in the air is absorbed by the heat of vaporization that flows into the evaporator 45 and is evaporated. After the evaporated refrigerant is further introduced into the compressors (41) (42) (43) and compressed, the refrigerant is introduced again into the double tube condenser (44).

In addition, the condensed water generated while the refrigerant is evaporated in the evaporator 45 is dropped into the drain pan 46 and discharged to the outside of the indoor unit 3 through the drain portion 39.

In addition, the flow of air inside the indoor unit 3 is generated by the blowing fan 48. In detail, when the blower fan 48 is driven, outside air flows into the evaporator 45 through the suction port 31 and the suction passage 40, and the outside air is cooled in the vicinity of the evaporator 45. The cooled outside air is supplied to each indoor space partitioned through the duct connecting portion 32 via the blowing fan 48.

On the other hand, three compressors 41, 42, 43 are placed as shown, so that a plurality of compressors 41, 42, 43 are formed in this way, it is selected from a plurality of compressors in accordance with the cooling load The compression capacity of the refrigerant is changed and performed in some combination. 7 illustrates a change diagram of the cooling load according to the operation state of the compressor.

Referring to FIG. 7, the compressor is selectively operated according to the cooling load of the indoor space. As the cooling load is gradually increased, the compression capacity of the refrigerant is gradually increased as the compression frequency of the inverter compressor 42 is initially increased. In the figure C3 shows the compression capacity of the refrigerant carried by the inverter compressor. However, it should be noted that as the compression frequency of the inverter compressor 42 is gradually increased, the compression capacity of the refrigerant is gradually increased, and thus the cooling capacity by the indoor unit 3 is also gradually increased.

When the cooling load of the indoor space increases and exceeds a predetermined level, the inverter compressor 42 cannot support the increased cooling load alone, and at this time, the first constant speed compressor 41 must be operated. In the figure, C1 shows the compression capacity of the first constant speed compressor. Further, when only the first constant speed compressor 41 and the inverter compressor 42 cannot handle the cooling load, the second constant speed compressor 43 is even operated so that more refrigerant is compressed. In the figure, C2 shows the compression capacity of the second constant speed compressor 43.

As a result, the inverter compressor 42 and the constant speed compressors 41 and 43 are selectively operated in combination, whereby the compression capacity of the refrigerant by the compressor is linearly increased, and is optimally adjusted according to the cooling load of the indoor environment. The compressor is operated in combination.

On the other hand, if the compression capacity of the compressor (41, 42, 43) is changed linearly, it can be easily guessed that the heat of vaporization of the refrigerant, the cooling capacity of the room, and the amount of heat of condensation of the double tube condenser are also increased accordingly. . Therefore, at this time, the proportional control flow rate control valve 11 is controlled linearly, so that an appropriate amount of cooling water is supplied to the double tube condenser 44. The flow rate control of the proportional control flow rate control valve 11 may be performed by the control of the indoor control unit 12.

In addition, in order for the cooling water to be supplied in accordance with the amount of cooling water passing through the overall proportional control flow control valve 11 installed in the building, the operating state of the cooling tower 2 is controlled by the central control unit 13. To work.

Hereinafter, the configuration of a water-cooled air conditioning system according to the present invention will be described in detail with reference to a block diagram. 8 is a block diagram of a water-cooled air conditioning system according to the present invention.

Referring to FIG. 8, a central control unit 13 for controlling the overall air conditioning state of the building, a cooling tower control unit 51 and a pump control unit 52 controlled by the central control unit 13, and the central control unit 13 are provided. The indoor control unit 12 is controlled by a) and placed on each floor of the building or each indoor space that is partitioned.

The cooling tower control unit 51 controls the overall cooling water supply state to be adjusted by the cooling tower 2 so as to be suitable for the overall cooling load of the building, and the pump driving unit 52 circulates the cooling water flowing through the cooling water pipe 4. Let this be controlled.

In addition, the indoor control unit 12 operates in conjunction with a display unit 53 in which the control state of the indoor environment is displayed to the user, and an operation unit 54 for operating the control state of the indoor environment by the user. In addition, the indoor control unit 12 is associated with a plurality of driving units to control the indoor environment. Specifically, the control state of the overall indoor unit 3 including the valve drive unit 55 and the compressors 41, 42, 43 for operating the control state of the proportional control flow control valve 11 is operated. The indoor unit driving unit 56, a damper control unit 57 for adjusting the supply state of the cold air introduced into each space divided into a room, and a ventilation control unit 58 for controlling the inflow of the indoor air.

According to the present invention, there is no need for a separate space for installation of the double pipe condenser used for the indoor unit of the water-cooled air conditioning system, and furthermore, there is an advantage that the internal space of the indoor unit can be used more efficiently.

In addition, since the double pipe condenser can be installed simply and conveniently, the operator has the advantage that the installation of the double pipe condenser is terminated simply by placing the double pipe condenser along the outer periphery of the lower panel which is conveniently set in advance.

In addition, by appropriately increasing the number of double pipes, the overall length of the double pipe can be conveniently adjusted, there is an advantage that can conveniently cope with the cooling load of the room.

Claims (9)

A constant speed compressor and an inverter compressor in which a refrigerant is compressed; A double pipe condenser including a double pipe bent along a lower outer circumference of the indoor unit to condense the compressed refrigerant through contact with the cooling water; An evaporator which evaporates to supply cold air after the condensed refrigerant is expanded; And And according to the cooling load of the indoor space, the indoor control unit for controlling the compression capacity of the refrigerant by the constant speed compressor and the inverter compressor and the amount of cooling water flowing in the double pipe condenser linearly variable; The double pipe is disposed adjacent to the lower inner surface of the indoor unit, The indoor control unit is an indoor unit of a water-cooled air conditioning system that is operated in conjunction with the ventilation control unit to control the indoor inflow of the outside air. The method of claim 1, The plurality of double pipes, the indoor unit of the water-cooled air-conditioning system, the header is placed at the end of the double pipe to distribute the cooling water. The method of claim 1, The double pipe is an indoor unit of a water-cooled air conditioning system is bent in a square. The method of claim 1, The double pipe is stacked up and down indoor unit of the water-cooled air conditioning system is used a plurality. The method of claim 1, The double tube condenser of the indoor unit of the water-cooled air conditioning system is mounted on the lower panel of the indoor unit. delete delete delete delete

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