KR20060097492A - 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 panels for protecting the outside, a compressor for compressing the refrigerant, an evaporator in which the compressed and expanded refrigerant is evaporated, and a blower fan for allowing cold air near the evaporator to flow to the outside. In the indoor unit of the water-cooled air-conditioning system included, at least one of the panel is characterized in that the refrigerant pipe through which the refrigerant flows, and the cooling water pipe through which the cooling water flows is installed and used as a condenser.

The present invention does not require a separate internal space for placing the condenser, there is an advantage that the internal space of the indoor unit of the water-cooled air conditioning system can be easily secured. And, since the function of the condenser is performed in the side panel portion of the indoor unit, there is an advantage that the heat exchange efficiency is enhanced by the natural convection effect by the air, and even if a relatively small amount of cooling water is supplied, sufficient heat exchange efficiency can be obtained.

Water Cooled, HVAC, Condenser, Side Panel

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 an exploded perspective view of an indoor unit according to another embodiment of the present invention.

7 is an exploded perspective view of an indoor unit according to another embodiment of the present invention.

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

9 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>

35: side panel 74: refrigerant inlet tube 75: refrigerant outlet tube

76: cooling water pipe 82: double pipe condenser

The present invention relates to a water-cooled air conditioning system, and more particularly, to an indoor unit structure of a water-cooled air conditioning system in which the size of the indoor unit of the water-cooled air conditioning system is reduced, and the heat exchange efficiency is improved to improve the operating efficiency of the overall 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. The coolant warmed in the indoor unit forms one cycle of being circulated and cooled again 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 a device in which heat exchange is performed between a coolant and a coolant in an indoor unit, a condenser in which the coolant and the coolant flow through the outer tube and the inner tube, respectively, is generally used.

On the other hand, it is common that the condenser is bent on any one side of the lower side of the indoor unit and rolled into a spiral shape to be concentrated and formed on one side. However, in this way, if the condenser is concentrated on the lower side of the indoor unit, there is a disadvantage in that the utilization of the indoor unit internal space is inferior, and the heat exchange performance is inferior because the compressor is approaching as a heat generating source nearby.

Due to such a problem, there is a problem that the use efficiency of the indoor unit is lowered as a whole.

The present invention has been proposed to solve the above problems, and aims to optimize the arrangement of the indoor unit and improve the operating efficiency of the air conditioner by optimizing the arrangement of the condenser in the indoor unit of the water-cooled air conditioning system.

In addition, an object of the present invention is to propose an indoor unit of a water-cooled air conditioning system in which the heat exchange efficiency of the condenser in the indoor unit is increased.

The indoor unit of the water-cooled air conditioning system according to the present invention for achieving the above object is a plurality of panels for protecting the outside, a compressor for compressing the refrigerant, an evaporator for the compressed and expanded refrigerant is evaporated, and the cold air near the evaporator is external In the indoor unit of the water-cooled air-conditioning system including a blower fan to flow to the, wherein at least one of the panel is a condenser panel is used as a condenser is provided with a refrigerant pipe through which the refrigerant flows, and a cooling water pipe through which the coolant flows do.

In the indoor unit of the water-cooled air-conditioning system of the present invention according to another aspect of the indoor unit of the water-cooled air-conditioning system in which the refrigerant is condensed by cold cooling water flowing from the outside, the indoor unit of the indoor unit includes a plurality of panels to partition the outer space and At least one of the panels is provided with a contact portion in contact with the coolant and the coolant to operate as a condenser panel.

According to the present invention, the condensation efficiency of the indoor unit can be increased, and the arrangement of the indoor unit can be optimized to reduce the overall size of the indoor unit.

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 coolant filled 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. The proportional control flow rate control valve 11 is a valve capable of continuously increasing or decreasing the flow rate of the fluid passing through the valve by a predetermined input signal in which the height is indicated.

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.

As such, the reason why the coolant is to be controlled by the proportional control flow control valve 11 is that, although the cooling load is small, when a large amount of coolant is introduced, liquid refrigerant may flow into the compressor and the compressor may be damaged. This is because a sufficient cooling capacity cannot be obtained when a small amount of cooling water is introduced despite a large cooling load. This is because the water-cooled air conditioning system is different from the air-cooled air conditioning system because the heat transfer is performed by the direct heat transfer method by conduction between the refrigerant and the coolant, and thus the amount of condensation heat of the condenser is directly changed according to the amount of cooling water supplied. .

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 includes a front panel 33, an upper panel 36, a side panel 35, a lower panel 34, and a rear panel 60, respectively. do. In addition, the front panel 33 is formed with an inlet port 31 through which outside air is introduced, and outside air is introduced therein, and the upper panel 36 is formed with a duct connection part 32 to cool the air through a predetermined duct. Discharge to each space in the room.

On the other hand, the side panel 35 serves to protect the side of the indoor unit, and also serves as a condenser. Therefore, the side panel 35 is provided with a coolant inlet tube 71 through which cold coolant flows, and a coolant outlet tube 72 through which warmed coolant flows out. In addition, the side panel 35 is a hollow space inside the cooling water flows from the upper side to the lower side, the refrigerant pipe 73 is accommodated in the empty space of the side panel 35. The refrigerant flows inside the refrigerant pipe 73 from the upper side to the lower side of the side panel 35, so that the refrigerant flows to face the cooling water, thereby improving heat transfer efficiency. Of course, the coolant flows inside the outer circumferential surface of the coolant tube 73 and the coolant flows outside the coolant tube 73 to perform heat exchange.

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 are placed. 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 pressure of the compressor to vary the amount of refrigerant. In addition, the coolant and the coolant are introduced into the side panel 35 to directly exchange heat with each other with the coolant pipe 73 interposed therebetween. Therefore, the side panel 35 may be referred to as a condenser panel.

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 flow path 40. In addition, a drain pan 46 is disposed below the evaporator 45 to smoothly drain the condensed water generated while the refrigerant is evaporated in the evaporator 45. In addition, 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 provided with a drain 39 communicating with a portion of the drain pan 46. Sak drain portion 39 may be formed on the other side panel that is opposite to the side panel 35, in this case it is possible to obtain the advantage that the configuration of the indoor unit more simple.

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.

The operation of the indoor unit 3 will be described with reference to the above configuration. First, the refrigerant is condensed by the side panel 35 in which the role of the condenser is performed. Cooling coolant flows upward from the lower side to the empty space inside the side panel 35, and the coolant flows into the coolant pipe 73 placed in the inner space of the side panel 35, and the coolant flows through the heat exchange between the coolant and the coolant. Is condensed. Therefore, the refrigerant pipe functions as a contacting portion where the coolant and the coolant contact each other.

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. Then, the evaporated refrigerant is introduced into the compressors 41, 42, 43 and further compressed, and then flows back into the refrigerant pipe 73 inside the side panel 35.

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, as a feature of the present invention, the side panel 35 can be seen that the role of the condenser panel and at the same time the role of the protective plate is shielded from the outside of the indoor unit is performed. Therefore, since there is no need for a separate space inside the indoor unit to place the condenser, there is an advantage that can secure a wide space for seating the internal parts of the indoor unit. In addition, since the side panel 35 is placed outside the indoor unit, the heat exchange efficiency of the refrigerant is enhanced by natural convection, and the refrigerant pipe 73 can be located relatively large in a large area of the side panel 35. Therefore, even if the indoor unit becomes a large capacity, there is an advantage that can be appropriately coped.

As another embodiment of the side panel 35 described above, another embodiment of the side panel 35 in which the role of the condenser is performed is presented.

6 is an exploded perspective view of an indoor unit of a water-cooled air conditioning system according to another embodiment. This embodiment is the same as the other embodiment of the other embodiment, except that the flow of the refrigerant and the cooling water flowing inside the side panel is characterized.

A coolant flows in the empty space inside the side panel 35, and a coolant pipe 76 through which coolant flows is placed in the inner space of the side panel 35. As a result, in contrast to the original embodiment, the coolant coolant flows inside a predetermined conduit placed inside the side panel 35, and the hot refrigerant flows through the entire empty space inside the side panel 35 and condenses. It flows out through the refrigerant | coolant outflow pipe 75 formed in the lower side of the 35.

To this end, a coolant inlet pipe 74 through which the coolant flows into the inner space of the side panel is formed on the upper side of the side panel 35, and the coolant is condensed inside the side panel 35 on the lower side of the side panel 5. The coolant outflow pipe 75 which flows out behind is formed. The bent cooling water pipe 76 is inserted into the inner space of the side panel 35 so that the cooling water flows from the lower side to the upper side. The refrigerant in contact with the cooling water pipe 76 is discharged to the outside of the side panel 35 after being condensed by the temperature of the cold cooling water and falling downward. Therefore, the coolant pipe 76 performs a function as a contacting portion where the coolant and the coolant contact each other.

In addition, since the configuration and operation of the indoor unit is the same as the original embodiment, a detailed description thereof will be omitted.

7 is an exploded perspective view of an indoor unit of a water-cooled air conditioning system according to still another embodiment. This embodiment is the same as the original embodiment, the other parts, except that the flow of the refrigerant and the cooling water flowing in the inside of the side panel is characterized.

The double tube condenser 82 is bent a plurality of times in the side panel 35. When the double tube condenser is described in detail, the double tube condenser is formed with an inner tube and an appearance spaced apart from the inner tube by a predetermined distance. Coolant flows through the inner tube, and a coolant flows in the space between the inner tube and the outer tube. Therefore, the coolant comes into contact with the cold outer circumferential surface of the inner tube, and the coolant cools, condenses, and falls downward.

For this operation, a refrigerant inlet tube 79 and a coolant outlet tube 78 are disposed above the side panel 35, and a refrigerant outlet tube 80 and a coolant inlet tube below the side panel 35. 77 lies. In addition, the coolant inlet pipe 79 and the coolant outlet pipe 80 are connected to the outer circumference of the coolant outlet pipe 78 and the coolant inlet pipe 77. It can be easily guessed that the coolant inlet tube 78 and the coolant outlet tube 78 perform the function of the inner tube in the double tube condenser. In addition, the inner tube performs a function as a contact portion where condensation is performed by contacting the coolant and the coolant.

In addition, since the configuration and operation of the indoor unit is the same as the original embodiment, a detailed description thereof will be omitted.

In addition, the double tube condenser 82 may be fixed to the inner side or the outer side of the side panel (35). If it is fixed to the inner surface of the side panel 35, the appearance of the side panel can be obtained a neat effect, if the fixed to the outer surface of the side panel 35, the refrigerant is further condensed by natural convection Therefore, the advantage that the heat exchange efficiency is improved can be obtained.

Also in the other embodiments described above, since the condenser is placed in the position of the side panel, the heat exchange efficiency is improved, and of course, it is possible to secure a large internal space of the indoor unit.

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. 8 illustrates a change diagram of the cooling load according to the operation state of the compressor.

Referring to FIG. 8, 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 42.

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 heat of condensation of the condenser are also increased accordingly. Therefore, at this time, the proportional control flow rate control valve 11 is controlled linearly so that the appropriate amount of cooling water is supplied to the 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 detail, a change in the operating state of the compressors 41, 42, 43 is sensed by the indoor control unit 12, and an appropriate amount of cooling water is determined by such a detection signal. In addition, in order to allow an appropriate amount of cooling water to pass through the proportional control flow control valve 11, a predetermined control signal for controlling the opening degree of the proportional control flow control valve 11 is controlled by the indoor control unit 12. At is to be transmitted to the proportional control flow control valve (11).

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. It works.

As such, since air conditioning is performed by a single control system for one building, there is an advantage that air conditioning of a building can be performed simply and conveniently.

On the other hand, the present embodiment has been described that the side panel is operated as a condenser panel, as long as any panel in contact with the outside, front, rear, top, bottom panel any panel may act as a condenser panel. In addition, when only one panel lacks a function as a condenser, a plurality of panels may be applied to the condenser panel.

The present invention does not require a separate internal space for placing the condenser, there is an advantage that the internal space of the indoor unit of the water-cooled air conditioning system can be easily secured.

In addition, since the function of the condenser is performed in the side panel portion of the indoor unit, there is an advantage that the heat exchange efficiency is enhanced by the natural convection effect by the air, it is possible to obtain a sufficient heat exchange efficiency even if a relatively small amount of cooling water is supplied.

In addition, since the distance from the indoor heat source of the indoor unit is spaced, it is possible to obtain the advantage that the heat from the indoor heat source of the indoor unit is not transferred to the refrigerant.

Claims (11)

In the indoor unit of the water-cooled air conditioning system comprising a plurality of panels to protect the outside, a compressor for compressing the refrigerant, an evaporator for the compressed and expanded refrigerant is evaporated, and a blowing fan for allowing the cold air in the vicinity of the evaporator to flow to the outside, At least one of the panels is a indoor unit of a water-cooled air conditioning system, characterized in that the refrigerant pipe through which the refrigerant flows, and a cooling water pipe through which cooling water flows, and is used as a condenser. The method of claim 1, The condenser panel is a indoor unit of the water-cooled air conditioning system is a side panel. The method of claim 1, The refrigerant pipe is bent in the empty space inside the condenser panel, the cooling water is indoor unit of the water-cooled air conditioning system for flowing the empty space. The method of claim 1, The cooling water pipe is bent in the empty space inside the condenser panel, the refrigerant flows through the empty space. The method of claim 1, And the coolant pipe and the cooling water pipe are double pipes connected to the condenser panel. The method of claim 1, The refrigerant pipe and the cooling water pipe are double pipes, the indoor unit of the water-cooled air conditioning system fixed to the inner space or the inner surface of the condenser panel. The method according to any one of claims 1 to 6, The refrigerant in the indoor unit of the water-cooled air-conditioning system flows from the upper side of the condenser panel to the lower side. The method of claim 1, The indoor unit of the water-cooled air conditioning system in which the amount of cooling water flowing through the cooling water pipe is linearly controlled. In the indoor unit of the water-cooled air conditioning system in which the refrigerant is condensed by cold cooling water flowing from the outside, An indoor unit of the water-cooled air conditioning system, comprising a plurality of panels to allow the internal space of the indoor unit to be partitioned from the outer space, and at least one of the panels is provided with a contact portion in contact with the cooling water and the refrigerant to operate as a condenser panel. . The method of claim 9, The contact unit is an indoor unit of a water-cooled air conditioning system located in the interior space of the condenser panel. The method of claim 9, The contact portion of the indoor unit of the water-cooled air conditioning system provided on either side of the condenser panel.

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