JPH10238813A - Air conditioning system device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system device in which the deterioration of the cooling capability of an air conditioner can be compensated and the stable operating environment of indoor devices can be maintained even when outside temperature terribly rises, heat load applied to the air conditioner can be levelled even when there is 'unevenness' in indoor temperature distribution, exhaust heat energy can be effectively used for colling a room and a high energy saving effect can be obtained. SOLUTION: A pre-cooling unit 80 is provided in an inlet port on the upper surface of each air conditioning unit 20 in a machine chamber B. An absorption type refrigerating machine 60 is operated under the exhaust heat energy of a gas range 40. Cold heat obtained by the absorption type refrigerating machine 60 is guided to each pre-cooling unit 80 through a water circulating cycle and a natural refrigerant circulating cycle. Then, air absorbed to each air conditioning unit 20 is pre-cooled by each pre-cooling unit 80.

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 used for air conditioning of a machine room in which high heat generating devices such as a computer and a communication device are installed.

[0002]

2. Description of the Related Art In a so-called machine room in which high heat generating devices such as a computer and a communication device are installed, an air conditioner is installed in the room to cope with a large amount of heat generation. As this air conditioner, a refrigerant circulation type is generally adopted (non-aqueous) in consideration of the fact that equipment in the machine room dislikes water. This consists of an indoor unit installed in the machine room and an outdoor unit installed on the roof of a building, etc., and sucks air in the machine room from the suction port of the indoor unit, cools the sucked air with a refrigerant, and It blows out from the unit into the machine room.

On the other hand, a gas engine is operated to supply the operating power of various air conditioners in a building, and an absorption chiller is operated by utilizing the exhaust heat of the gas engine to obtain the absorption chiller. There is a case where cooling heat is guided to a heat exchange unit in a living room by a water circulation cycle to cool the living room. Since there is nothing that dislikes water in the living room, such a water circulation cycle system can be installed.

[0004]

In the case of a refrigerant circulation type air conditioner including an indoor unit and an outdoor unit, the cooling capacity may be reduced in a situation where the outside air temperature rises sharply, such as in summer. In this case, the heat radiation of the equipment in the machine room cannot be completely processed, and there is a possibility that the operation of the equipment may be hindered.

[0005] Looking at the temperature distribution in the machine room, there are places where the room temperature rises high and places where the room temperature does not rise very much according to the type and arrangement of the equipment and the operating conditions of each equipment. is there. Such “variation” in the room temperature distribution appears as “variation” in the heat load applied to the air conditioner. The capacity of the air conditioner must be controlled in accordance with the "variation" of the heat load.

[0006] The present invention has been made in view of the above circumstances,
The purpose is to maintain the stable operating environment of indoor equipment by compensating for the decrease in cooling capacity of the air conditioner even in a situation where the outside air temperature rises sharply, and there is "variation" in the indoor temperature distribution. It is still another object of the present invention to provide an air conditioning system device that can level the heat load applied to the air conditioner, and can effectively use the heat energy for indoor cooling, thereby obtaining a high energy saving effect. .

[0007]

Means for Solving the Problems First Invention (Claim 1)
Air-conditioning system equipment draws indoor air from the suction port,
An air conditioner that cools the intake air and blows the air into the room, an air heat exchanger provided at a position corresponding to a suction port of the air conditioner, and a heat exchanger. A refrigerant natural circulation cycle that naturally circulates refrigerant between the heat exchanger, an absorption refrigerator that operates by receiving heat energy, and a heat exchanger that cools the heat obtained by the absorption refrigerator to the refrigerant natural circulation cycle. And a heat supply means for supplying the heat to the air.

An air conditioning system according to a second aspect of the present invention corresponds to an air conditioner that sucks room air from a suction port, cools the suction air and blows the air into a room, and a suction port of the air conditioner. A refrigerant natural circulation cycle having an air heat exchanger provided at a position, a water / refrigerant heat exchanger, and naturally circulating refrigerant between the water / refrigerant heat exchanger and the air heat exchanger; An absorption refrigerator that operates by receiving energy, and a water circulation cycle that guides cold generated by the absorption refrigerator to the water / refrigerant heat exchanger of the refrigerant natural circulation cycle by circulating water.

An air conditioning system apparatus according to a third aspect of the present invention comprises an indoor unit and an outdoor unit. The indoor air is sucked from a suction port on the upper surface of a housing of the indoor unit, and the sucked air is cooled by a refrigerant. An air conditioner that blows into the room,
It has an air heat exchanger, has a pre-cooling unit provided on the upper surface of the housing of the indoor unit, and has a water / refrigerant heat exchanger, and has a water / refrigerant heat exchanger and the air heat exchanger. A natural circulation cycle for naturally circulating the refrigerant in the refrigerator, an absorption refrigerator operating by receiving heat energy, and a water circulation for guiding the cold heat obtained by the absorption refrigerator to the water / refrigerant heat exchanger by circulating water. And a cycle.

An air conditioning system apparatus according to a fourth aspect of the present invention comprises an indoor unit and an outdoor unit, and sucks air in a machine room in which high heat-generating equipment is installed from a suction port on a top surface of a housing of the indoor unit. A plurality of air conditioners, each of which has a plurality of air conditioners, which cools the intake air with a refrigerant and blows the air into a machine room; an air heat exchanger; A refrigerant natural circulation cycle that has a refrigerant heat exchanger and naturally circulates refrigerant between the water / refrigerant heat exchanger and each of the air heat exchangers; and an absorption refrigeration system that operates by receiving heat energy from the outside. Machine and
A water circulation cycle that guides cold heat obtained by the absorption refrigerator to the water / refrigerant heat exchanger by circulating water.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, there is a building 1 having a living room A, a plurality of machine rooms B for installing communication devices, and a machine room C for installing a cogeneration device. Each room is partitioned into upper and lower floors by a floor (also a ceiling) 2.

On the floor 2 of the living room A and each machine room B,
A double floor structure in which the upper floor 3 is placed with a predetermined gap is adopted. The space between the floors (hereinafter referred to as the underfloor space) is used for laying communication cables and for ventilation.

An air conditioning unit (= indoor unit) 10 and a heat exchange unit 15 are installed on the upper floor 3 of the living room A. The air conditioning unit 10 constitutes a refrigerant circulation type air conditioner together with the outdoor unit 11 installed on the rooftop of the building 1, and sucks air in the living room A from an intake port on the front of the housing as shown by an arrow. Then, the suction air is cooled by a refrigerant and blown out to the living room A from an outlet on the front surface of the housing.

The heat exchange unit 15 sucks the air in the living room A from a suction port on the front of the housing, as indicated by an arrow.
The intake air is cooled by cold water guided by a water circulation cycle 63 described later, and is blown out to the living room A from an outlet on the front surface of the housing.

A plurality of air conditioning units (= indoor units) 20 are installed on the upper floor 3 of each machine room B, respectively. These air conditioning units 20 constitute a refrigerant circulation type air conditioner together with an outdoor unit 21 installed on the roof of the building 1, and as shown by arrows, draw air in the machine room B into a suction port ( The air is sucked through a suction port 20a described below, and the suctioned air is cooled by a refrigerant and blown out from an outlet on the lower surface of the housing (an outlet 20b described later) into the underfloor space.

The cooling air blown into the underfloor space passes through the underfloor space as shown by the arrow, and is guided to a high heat generating device 30 such as a computer or a communication device installed on the upper floor 3. The cooling air guided to the high heat-generating device 30 removes heat from the device and is released into the room. The released air flows through the indoor space and is sucked into the air conditioning unit 20 again.

In the machine room C, a cogeneration apparatus (referred to as CGS) mainly including the gas engine 40 is installed, and further, an exhaust gas boiler 50 and an absorption refrigerator 60 are installed.

The gas engine 40 is operated using city gas as fuel, and drives the generator 100. The gas engine 40 is provided with a cooling tower 41 for radiating engine cooling water. Generator 1
The generated power of 00 is used as drive power for various air conditioners in the building 1.

Exhaust gas generated by the combustion of the gas engine 40 is supplied to an exhaust gas boiler 50 through a pipe 42. The exhaust gas boiler 50 generates steam by the thermal energy of the exhaust gas. This steam is supplied to the absorption refrigerator 6 by the pipe 51.
0 is supplied. The exhaust gas from which heat has been removed by the exhaust gas boiler 50 is discharged out of the building 1 by the pipe 52.

Further, hot water generated by the combustion of the gas engine 40 is supplied to the absorption refrigerator 60 through the hot water circulation pipe 43. The absorption refrigerator 60 includes an evaporator, an absorber, a low-temperature regenerator, a high-temperature regenerator, and a condenser, and further includes a cooling water circulation pipe 61 and a roof-mounted cooling tower 6.
2 is provided, and as heat energy from the outside, heat of steam supplied from the exhaust gas boiler 50 and hot water supplied from the gas engine 40 are supplied to each regenerator and supplied from a cooling water circulation pipe 61. The operation is performed by introducing cooling water to an absorber and a condenser to generate cold heat via an evaporator.

The cold heat obtained by the absorption refrigerator 60 is supplied to a heat exchange unit 1 in the living room A by a water circulation cycle (heat supply means) composed of a cold water circulation pipe 63 and a water pump 64.
5, and a plurality of heat exchange units 70.

Each heat exchange unit 70 is provided corresponding to each machine room B. Refrigerant circulation pipes 71 extend from the heat exchange units 70 into the machine room B. A plurality of pre-cooling units 80 are connected to the end of the refrigerant circulation pipe 71.

Each pre-cooling unit 80 is mounted and fixed on the upper surface of the housing of each air-conditioning unit 20 (having an outlet). FIG. 2 shows a specific configuration from the absorption refrigerator 60 to the heat exchange unit 70, each precooling unit 80, and each air conditioning unit 20.

The cold water circulation pipe 63 is composed of a pair of pipes 63.
a, 63b. The refrigerant circulation pipe 71 includes a pipe 71a through which a liquid refrigerant flows, and a pipe 71b through which a gas refrigerant flows.

Each heat exchange unit 70 has a water / refrigerant heat exchanger 72, a liquid receiver (also called a receiver) 73, and a liquid refrigerant 74 filled in the liquid receiver 73. The heat exchange unit 70 and each of the refrigerant circulation pipes 71 constitute a refrigerant natural circulation cycle for naturally circulating the refrigerant between the water / refrigerant heat exchanger 72 and each of the pre-cooling units 80.

Each pre-cooling unit 80 has a thin box shape, and has a suction port 80a on the upper surface of the housing and an air outlet 80b on the lower surface of the housing, and air is provided between the air inlet 80a and the air outlet 80b. The heat exchanger 81 is housed.

Each air conditioning unit 20 has a suction port 20a on the upper surface of the housing and an air outlet 20b on the lower surface of the housing.
A heat exchanger (evaporator) 22 and a fan 23 are provided in a ventilation passage extending from a to the outlet 20b.

Each pre-cooling unit 80 is mounted such that the lower surface of the housing is in close contact with the upper surface of the housing of each air conditioning unit 20. By this attachment, the outlet 80b of each pre-cooling unit 80 communicates with the inlet 20a of each air conditioning unit 20, and a ventilation path is formed from the inlet 80a of each pre-cooling unit 80 to the outlet 20b of each air conditioning unit 20. Is done.

Next, the operation of the above configuration will be described. When each air conditioning unit 20 is operated, cooling air is blown out from each air conditioning unit 20 and is guided to the high heat generating equipment 30 in the machine room B through the underfloor space. Thereby, the high heat generating device 30 is cooled. The air after cooling (temperature rising) is discharged into the room space of the machine room B.

The room air in the machine room B is first sucked into the pre-cooling unit 80 above the air conditioning unit 20, and is cooled (pre-cooled) when passing through the air heat exchanger 81. Due to this cooling, room air having a temperature of, for example, 27 ° C. is reduced to a temperature of, for example, 24 ° C.

The air precooled by the air heat exchanger 81 flows into the air conditioning unit 20 and is cooled when passing through the heat exchanger 22 to become cooling air. By the cooling in the air conditioning unit 20, the air which has been lowered to the above-mentioned temperature of 24 ° C. is further lowered to, for example, a temperature of 19 ° C.

As described above, by performing pre-cooling by the pre-cooling unit 80 before performing cooling by the air-conditioning unit 20, even when the cooling capacity of the air-conditioning unit 20 is reduced in a situation where the outside air temperature rises sharply such as in summer. Thus, a stable operating environment of the high heat generating device 30 can be maintained by compensating for the decrease in the cooling capacity.

Looking at the temperature distribution in the machine room B, depending on the type and arrangement of the high heat generating devices 30 and the operating conditions of the high heat generating devices 30, there are places where the room temperature rises high, and cases where the room temperature rises. Some places do not go very well. This “variation” of the room temperature distribution appears as “variation” of the heat load applied to each air conditioning unit 20, and the “variation” of the heat load is leveled in advance by the pre-cooling of each pre-cooling unit 80. become.
That is, since the refrigerant naturally circulates in the air heat exchanger 81 of each pre-cooling unit 80, the higher the suction air temperature, the more the evaporation amount is promoted,
Therefore, more heat exchange is performed in a place where the heat load is high. Thus, the heat load is leveled.

The gas engine 40 and the exhaust gas boiler 5
0, heat exchange unit 1 by operation of absorption refrigerator 60
Cold water is sent to 5 and the inside of the living room A is cooled through the heat exchange unit 15. Further, the cold energy obtained by the absorption refrigerator 60 is effectively and preferentially used for pre-cooling of each pre-cooling unit 80, that is, for cooling the room. Thereby, a high energy saving effect can be obtained.

By the way, in general, a cooling unit (corresponding to the heat exchange unit 15 of the living room A) utilizing the exhaust heat energy of the gas engine 40 is often positioned as an additional installation. In addition, the air conditioning units 20 are often distributed and installed in the machine room B in accordance with the heat generation load balance.
It is often difficult to secure an installation place by additionally installing a cooling unit using the exhaust heat energy of the above. further,
Since the cooling unit using the exhaust heat energy of the gas engine 40 is often positioned as an additional installation, the heat load at the installation location does not always match the location of the heat load to be preferentially processed. Further, simply installing a cooling unit is not preferable in terms of wind balance.

On the other hand, each pre-cooling unit 8
0 is installed above each of the air conditioning units 20 already installed, so that optimal pre-cooling can be performed without adversely affecting the heat balance and the air volume balance in the machine room B.

The cooling heat obtained in the absorption refrigerator 60 is transferred to each machine room B by a water circulation cycle. A refrigerant circulation cycle is provided in the machine room B on each floor, and the refrigerant circulation cycle and the water circulation cycle are separated. Between the water / refrigerant heat exchanger 7
Since the configuration is such that water is prevented from entering into each machine room B with the interposition of 2, non-watering of each machine room B can be maintained, and high reliability of the communication system can be secured. .

Further, since the exhaust heat energy of the gas engine 40 is guided not only to the circulation system using the refrigerant but also to the machine room B on each floor including the water circulation cycle, there is a concern that the high-pressure gas safety regulation may be in conflict. There is no. In other words, if an air conditioning system is created using only a refrigerant circulation cycle, the amount of refrigerant charged must be at least 20 refrigeration tons and a notification based on the high-pressure gas safety regulations must be made. , Such a treatment becomes unnecessary. A favorable effect can be obtained in terms of costs such as maintenance and labor costs.

The cooling heat obtained by the absorption refrigerator 60 is used for cooling in a relatively high temperature range from 27 ° C. to 24 ° C. (= pre-cooling in the air heat exchanger 81), and the pre-cooling is performed. In the air heat exchanger 81 that performs the above, the natural circulation of the refrigerant is performed, and the higher the suction air temperature, the more the evaporation amount is promoted, so that the efficient use of the heat energy becomes possible. Also in this respect, the energy saving effect can be improved.

Since the pre-cooling is performed in a high temperature range, the temperature of the cold heat obtained by the absorption refrigerator 60, and thus the temperature of the cold water flowing through the water circulation cycle, can be set relatively high. That is, the cold water production efficiency can be reduced, which can contribute to downsizing and cost reduction of refrigeration equipment such as the absorption chiller 60.

The additional installation of the pre-cooling unit 80 enables the water / water cooling without stopping the operation of each air conditioning unit 20.
It can be completed only by making a pipe connection with the refrigerant heat exchanger 72. Therefore, the high heat generating equipment 3 in each machine room B
0 can always be processed without delay.

Even if a failure occurs in any of the gas engine 40, the exhaust gas boiler 50, and the absorption chiller 60, the operation of each air conditioning unit 20 is continued. Can be processed without delay, and the reliability of the communication system can be maintained.

By preparing a larger number of pre-cooling units 80 in advance than the number of air-conditioning units 20 to be installed, the gas engine 40 can be installed depending on the subsequent installation of the air-conditioning units 20. Exhaust heat energy can be used up. This also leads to an improvement in the energy saving effect.

In the above embodiment, each air conditioning unit 2
Although the housing of each pre-cooling unit 80 is placed on the upper surface of the housing 0, the housing of each air-conditioning unit 20 and the housing of each pre-cooling unit 80 may be integrated. With this configuration, the workability can be improved.

In the above embodiment, the case where the heat source of the exhaust heat energy is the gas engine 40 has been described as an example. However, the present invention can be similarly applied to other heat sources. In addition, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the invention.

[0046]

As described above, according to the present invention, an air conditioner which sucks room air from a suction port, cools the suction air and blows the air into a room, and a device provided at a position corresponding to the suction port of the air conditioner. And a refrigerant natural circulation cycle having a heat exchanger, a natural circulation of refrigerant between the heat exchanger and the air heat exchanger, and an absorption refrigeration system that receives heat energy and operates. And a heat supply means for supplying the heat obtained by the absorption refrigerator to the heat exchanger of the refrigerant natural circulation cycle, so that the cooling capacity of the air conditioner is reduced even in a situation where the outside air temperature rises sharply. To maintain a stable operating environment of the indoor equipment, and even if the indoor temperature distribution has a “variation”, the heat load applied to the air conditioner can be leveled. Effectively used for cooling It can be provided an air conditioning system unit high energy-saving effect can Rukoto is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of an embodiment.

FIG. 2 is a view showing a specific configuration of a main part in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Building A ... Living room B ... Machine room C ... Machine room 2 ... Floor surface 3 ... Upper floor 10 ... Air conditioning unit 15 ... Heat exchange unit 20 ... Air conditioning unit 30 ... High heat generation equipment 40 ... Gas engine 50 ... Exhaust gas boiler 60 ... Absorption refrigerator 70 Heat exchange unit 72 Water / refrigerant heat exchanger 73 Liquid receiver 74 Liquid refrigerant 80 Precooling unit 81 Air heat exchanger

Claims (4)

[Claims] 1. An air conditioner that sucks room air from a suction port, cools the suction air, and blows the air into a room, an air heat exchanger provided at a position corresponding to the suction port of the air conditioner, and heat exchange. A refrigerant natural circulation cycle that naturally circulates refrigerant between the heat exchanger and the air heat exchanger; an absorption refrigerator that operates by receiving heat energy; An air conditioning system comprising: a heat supply unit that supplies the obtained cold heat to a heat exchanger of the refrigerant natural circulation cycle. 2. An air conditioner that sucks room air from a suction port, cools the suction air, and blows the air into the room, an air heat exchanger provided at a position corresponding to the suction port of the air conditioner, A refrigerant natural circulation cycle that has a refrigerant heat exchanger and that naturally circulates refrigerant between the water / refrigerant heat exchanger and the air heat exchanger; an absorption refrigerator that operates by receiving heat energy; An air-conditioning system comprising: a water circulation cycle that guides cold generated by the absorption refrigerator to a water / refrigerant heat exchanger of the refrigerant natural circulation cycle by circulating water. 3. An indoor unit and an outdoor unit,
An air conditioner that sucks indoor air from a suction port on the upper surface of the housing of the indoor unit, cools the sucked air with a refrigerant, and blows the air into the room; and an air heat exchanger, which is provided on the upper surface of the housing of the indoor unit. A pre-cooling unit, a water / refrigerant heat exchanger, and a natural refrigerant cycle for naturally circulating refrigerant between the water / refrigerant heat exchanger and the air heat exchanger. An air-conditioning system apparatus comprising: an absorption refrigerator that performs the following; and a water circulation cycle that guides cold generated by the absorption refrigerator to the water / refrigerant heat exchanger by circulating water. 4. An indoor unit and an outdoor unit,
A plurality of air conditioners, which suck air from inside the machine room where high heat-generating equipment is installed from the suction port on the upper surface of the housing of the indoor unit, cool the sucked air with refrigerant, and blow it out into the machine room, and an air heat exchanger A plurality of pre-cooling units provided on the upper surface of the housing of each indoor unit; and a water / refrigerant heat exchanger. A refrigerant natural circulation cycle for naturally circulating the refrigerant; an absorption refrigerator that operates by receiving heat energy from the outside; and cold heat obtained by the absorption refrigerator being guided to the water / refrigerant heat exchanger by circulating water. An air conditioning system device comprising: a water circulation cycle.