JP2015108492A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system wherein a general-purpose multi-type air cooling heat pump package is converted to one for a clean room.SOLUTION: An air conditioning system 1 has outdoor equipment that generates a coolant not at an instructed temperature and has the timing to perform protection control for protecting the equipment, and an outside air treatment air conditioning machine that has a coil to be fed with the coolant supplied from the outdoor equipment and having the timing to perform temperature control of the introduced outside air. The system has a plurality of systems comprising a combination of the outdoor equipment and the plurality of coils. At an air flow direction downstream side of the coil of a first system 100, a coil of a second system 200 different from the first system is disposed.

Description

  The present invention relates to an air conditioning system suitable for a clean room.

  Conventionally, in an industrial clean room air conditioning system, cold water and hot water are produced using a heat source system, cold water and hot water are supplied to an outside air processing air conditioner through a piping system, and the temperature and humidity of the outside air are controlled by the cold water and hot water. I was trying to supply this to a clean room.

For example, Patent Document 1 (Japanese Patent Application Laid-Open No. 08-114347) discloses a heat source system in which a cooling tower is used as a cold source in winter when the outside air temperature is low and a refrigerator is used as a cold source in summer when the outside temperature is high. ing.
Japanese Patent Laid-Open No. 08-114347

  Since the heat source system using the cooling tower and the refrigerator as described above is expensive, in order to construct an air conditioning system for a clean room, a corresponding cost has to be taken.

  Therefore, a general-purpose multi-type air-cooled heat pump package comprising an outdoor unit and an outside air processing air conditioner that obtains a refrigerant from the outdoor unit, adjusts the temperature of the outside air with the refrigerant, and introduces it into the room, is an air conditioning system for clean rooms. It is conceivable to divert it.

  However, when the general-purpose multi-type air-cooled heat pump package is diverted to an air conditioning system for a clean room, the following problems occur.

  In general-purpose multi-type air-cooled heat pump packages, in order to perform protection control for the purpose of protecting the self-machine, there is a case where timing for supplying a refrigerant different from the commanded temperature setting to the outside air treatment air conditioner may occur. On the other hand, in order to prevent dust, the inside of the clean room must be set to a positive pressure, so the fan in the outside air processing air conditioner must always be operated. For this reason, when a general-purpose multi-type air-cooled heat pump package is diverted to an air conditioning system for a clean room, there arises a problem that outside air different from the commanded temperature is introduced into the clean room.

  The present invention solves the above problems, and the invention according to claim 1 is an outdoor unit having a timing for generating a refrigerant that is not the commanded temperature and performing protection control for protecting the own unit. An air-conditioning system comprising an outside air processing air conditioner having a coil for controlling the temperature of the introduced outside air through which the refrigerant supplied from the outdoor unit is flowed, and comprising a combination of the outdoor unit and a plurality of the coils A plurality of systems are provided, and a coil of a second system different from the first system is arranged on the downstream side in the air flow direction of the coil of the first system.

  The invention according to claim 2 is the air conditioning system according to claim 1, wherein the capacity of the outdoor unit used in the first system is different from the capacity of the outdoor unit used in the second system. Features.

The invention according to claim 3 is the air conditioning system according to claim 1, wherein the overall length of the pipe for flowing the refrigerant used in the first system, and the total length of the pipe for flowing the refrigerant used in the second system,
Are different.

  The invention according to claim 4 is the air conditioning system according to any one of claims 1 to 3, wherein the protection control is oil return operation control.

  The invention according to claim 5 is the air conditioning system according to any one of claims 1 to 3, wherein the protection control is defrosting operation control.

  The invention according to claim 6 is the air conditioning system according to any one of claims 1 to 3, wherein the protection control is freeze prevention control.

  The invention according to claim 7 is the air conditioning system according to any one of claims 1 to 3, wherein the protection control is high-pressure control.

  The air conditioning system 1 of the present invention is characterized in that a coil of a second system different from the first system is arranged on the downstream side in the air flow direction of the coil of the first system. According to the air conditioning system 1 of the present invention, for example, even if the protection control is activated and the temperature of the coil of the first system is not the commanded temperature, the second system is arranged downstream in the air flow direction. This coil can make up for this, so that a general-purpose multi-type air-cooled heat pump package can be diverted to a clean room.

  Further, the capacity of the outdoor unit used in the first system is different from the capacity of the outdoor unit used in the second system, or the total length of the piping for flowing the refrigerant used in the first system, The probability that the first system and the second system shift to the protection control at the same time can be reduced by making the total length of the pipe for flowing the refrigerant used in this system different.

It is a figure showing typically the outline of air-conditioning system 1 concerning a 1st embodiment of the present invention. It is a figure which shows typically the outline | summary of the air conditioning system 1 which concerns on 2nd Embodiment of this invention. It is a figure which shows typically the outline | summary of the air conditioning system 1 which concerns on 3rd Embodiment of this invention. It is a figure which shows typically the outline | summary of the air conditioning system 1 which concerns on 4th Embodiment of this invention. It is a figure which shows typically the outline | summary of the air conditioning system 1 which concerns on 5th Embodiment of this invention.

  Hereinafter, preferred embodiments of an air conditioning system 1 according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a diagram schematically showing an outline of an air conditioning system 1 according to the first embodiment of the present invention.

  The air conditioning system 1 according to the present invention is configured based on a general-purpose multi-type air-cooled heat pump package. The multi-type air-cooled heat pump package is mainly composed of an outdoor unit for producing a refrigerant, an outside air processing air conditioner 10 having a coil housed in a casing, and a pipe for flowing the refrigerant through the coil. In the air conditioning system 1 according to the invention, at least two or more such configurations are provided. In the drawings, an outdoor unit, a coil, piping, and the like are schematically shown.

  Outside air OA is taken into the casing 11 of the air conditioning system 1, the temperature and humidity are adjusted, and the air is supplied to a clean room (not shown) as the supply air SA.

  The casing 11 is operated so as to always take in the outside air OA by operating the blower fan 22 and supply it to the clean room as the supply air SA, so that the inside of the clean room is always maintained at a positive pressure.

  The air taken into the casing 11 flows through the pre-filter 13 and the medium performance filter 14 to remove dust and the like in the air.

  The first system outdoor unit 105 in the first system 100 generates a refrigerant having a commanded temperature, and this refrigerant passes through the first system pipe 107 and the first system first coil 111 and the first system first in the casing 11. Two coils 112 are circulated.

  The second system outdoor unit 205 in the second system 200 generates a refrigerant having a commanded temperature, and this refrigerant passes through the second system pipe 207 and the second system first coil 211 and the second system first in the casing 11. 2 coils 212 are circulated.

  In the casing 11 in which the coil is installed, two flow paths through which airflow flows are provided. The first system first coil 111 is provided upstream of one flow path, and the second flow path is provided downstream thereof. A system second coil 212 is arranged.

  A second system first coil 211 is disposed upstream of the other flow path, and a first system second coil 112 is disposed downstream thereof.

  By the way, in the general-purpose multi-type air-cooled heat pump package, in order to perform protection control for the purpose of protecting the own machine, there may be a timing when a refrigerant different from the commanded temperature setting is caused to flow through the pipe. Such protection control includes (1) oil return operation control performed to return the oil accumulated in the piping to the compressor (not shown), and (2) to remove frost attached to the heat exchanger of the outdoor unit. There are defrosting operation control to be performed, (3) anti-freezing control to prevent the coil from freezing, and (4) high-pressure control to reduce the pressure in the pipe, and so on. Also in control, what is common is that when protection control is executed, refrigerant having a temperature different from the command value is circulated through the first system pipe 107 and the second system pipe 207.

  Therefore, the air conditioning system 1 of the present invention is characterized in that a coil of a second system different from the first system is always arranged downstream of the first system of coils in the air flow direction.

  According to such an air conditioning system 1 of the present invention, for example, even if the protection control is activated and the temperature of the coil of the first system is no longer the commanded temperature, the first is arranged downstream in the air flow direction. Since the two systems of coils can make up for this, a general-purpose multi-type air-cooled heat pump package can be diverted to a clean room.

  The air conditioning system 1 of the present invention can also use a general-purpose multi-type air-cooled heat pump package that performs protection control other than oil return operation control, defrost operation control, anti-freezing control, and high-pressure control.

The temperature of the air that has passed through the coils of the first system 100 and the second system 200 is adjusted, the humidity is controlled by the water film humidifier 17, the temperature is increased by the reheating coil 20, and the air passes through the HEPA filter 25. The air supply SA is supplied to the clean room.

  Next, another embodiment of the present invention will be described. FIG. 2 is a diagram schematically showing an outline of the air conditioning system 1 according to the second embodiment of the present invention. This embodiment is different from the first embodiment in that a third system 300 is provided in addition to the first system 100 and the second system 200. Thus, in the air conditioning system 1 according to the present invention, the number of systems can be increased more.

  Here, in the present embodiment, in the casing 11 in which the coil is installed, three flow paths through which the airflow flows are provided, and the first system first coil 111 is disposed upstream of the first flow path. However, the second system second coil 212 is arranged on the downstream side.

  A second system first coil 211 is disposed upstream of the second flow path, and a third system second coil 312 is disposed downstream thereof.

  A third system first coil 311 is disposed upstream of the third flow path, and a first system second coil 112 is disposed downstream thereof.

  According to the embodiment in which the number of systems is further increased as in the above-described embodiment, even if the protection control of any system is activated and a refrigerant different from the commanded temperature circulates in the pipe, the temperature by this The probability that the other systems can suppress the fluctuation is further increased, and the effect is higher than in the first embodiment.

Next, another embodiment of the present invention will be described. FIG. 3 is a diagram schematically showing an outline of the air conditioning system 1 according to the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that when viewed from the upstream side,
In addition to the first-stage coil and the second-stage coil, a third-stage coil is arranged. In this way, the number of coil stages can be further increased to suppress temperature fluctuations due to protection control.

  Here, in the present embodiment, in the casing 11 in which the coil is installed, three flow paths through which the airflow flows are provided, and the first system first coil 111 is disposed upstream of the first flow path. However, the second system second coil 212 is arranged on the downstream side, and the third system third coil 313 is arranged further on the downstream side.

  Further, the second system first coil 211 is arranged upstream of the second flow path, the third system second coil 312 is arranged downstream thereof, and the first system third coil 113 is arranged further downstream thereof. ing.

  Further, the third system first coil 311 is disposed upstream of the third flow path, the first system second coil 112 is disposed downstream thereof, and the second system third coil 213 is disposed further downstream thereof. ing.

  Also by such embodiment, the effect similar to previous embodiment can be enjoyed.

  Next, another embodiment of the present invention will be described. FIG. 4 is a diagram schematically showing an outline of an air conditioning system 1 according to the fourth embodiment of the present invention.

  In the embodiments described so far, the probability is extremely low, but it may occur that the protection control timings of two or more systems overlap. When this occurs, air at a temperature not commanded may be supplied to the clean room.

  Therefore, in the present embodiment, the capacity of the first outdoor unit 105 used in the first system 100 and the second system 200 used in the second system 200 to positively shift the protection control timing of each system. The capacity of the two-system outdoor unit 205 is different. Other points are the same as in the first embodiment.

  According to such an embodiment, the probability that the first system 100 and the second system 200 simultaneously shift to protection control can be reduced.

  Next, another embodiment of the present invention will be described. FIG. 5 is a diagram schematically showing an outline of an air conditioning system 1 according to the fifth embodiment of the present invention.

  As in the fourth embodiment, the fifth embodiment also has a configuration for avoiding overlapping of protection control timings of two or more systems.

  In the present embodiment, the timing of the protection control of each system is positively made different from the total length of the pipe for flowing the refrigerant used in the first system 100 and the total length of the pipe for flowing the refrigerant used in the second system 200. I try to shift it.

  Also according to such an embodiment, the probability that the first system 100 and the second system 200 simultaneously shift to protection control can be reduced.

DESCRIPTION OF SYMBOLS 1 ... Air conditioning system 10 ... Outside air processing air conditioner 11 ... Casing 13 ... Pre-filter 14 ... Medium performance filter 17 ... Water film humidifier 20 ... Reheating coil 22 ... Blower fan 25 ... HEPA filter 100 ... first system 105 ... first system outdoor unit 107 ... first system piping 111 ... first system first coil 112 ... first system 2nd coil 113 ... 1st system 3rd coil 200 ... 2nd system 205 ... 2nd system outdoor unit 207 ... 2nd system piping 211 ... 2nd system 1st coil 212 ... 2nd system 2nd coil 213 ... 2nd system 3rd coil 300 ... 3rd system 305 ... 3rd system outdoor unit 307 ... 3rd system piping 311 ... 3rd system 1st Coil 312 ... 3rd system 2nd coil 313 ... 3rd system 3 coil

Claims (7)

An outdoor unit having a timing for generating a refrigerant that is not at the commanded temperature and performing protection control for protecting the own unit;
In an air conditioning system comprising a refrigerant supplied from the outdoor unit and an outside air processing air conditioner having a coil for controlling the temperature of the introduced outside air,
Having a plurality of systems composed of combinations of the outdoor unit and the plurality of coils,
An air conditioning system, wherein a coil of a second system different from the first system is arranged on the downstream side in the air flow direction of the coil of the first system. The air conditioning system according to claim 1, wherein the capacity of the outdoor unit used in the first system is different from the capacity of the outdoor unit used in the second system. 2. The air conditioning system according to claim 1, wherein a total length of a pipe for flowing a refrigerant used in the first system is different from a total length of a pipe for flowing a refrigerant used in the second system. The air conditioning system according to any one of claims 1 to 3, wherein the protection control is oil return operation control. The air conditioning system according to any one of claims 1 to 3, wherein the protection control is defrosting operation control. The air conditioning system according to any one of claims 1 to 3, wherein the protection control is freeze prevention control. The air conditioning system according to any one of claims 1 to 3, wherein the protection control is high-pressure control.

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