JP4306354B2 - Waste heat recovery air conditioning mechanism - Google Patents

Description

  The present invention requires a stable room pressure from a special air-conditioning room such as a clean room or a constant temperature and humidity room to a general air-conditioning room, and supplies exhaust from a room where predetermined air-conditioning is performed to other air-conditioned spaces. The present invention relates to an exhaust heat recovery air conditioning mechanism for effective use.

  For example, pharmaceutical facilities have a clean room for manufacturing pharmaceuticals and a warehouse for storing raw materials and products. To prevent quality deterioration during storage, air conditioning that satisfies certain temperature and humidity conditions is also required in the warehouse. Has been. For this reason, the entire product warehouse is air-conditioned, and energy for that purpose is consumed.

  On the other hand, in a clean room, indoor air conditions such as temperature and humidity are maintained throughout the year at, for example, a temperature of about 23 ° C. and a humidity of about 50%. Such air conditions and cleanliness are due to the inflow of air from the outside. In order not to be affected, the room is managed so as to have a constant positive pressure. In other words, in a room where precise air conditioning is required and positive pressure is maintained, it is strictly controlled so that pressurized air supply and exhaust are always performed and a constant room pressure is maintained. Exhaust is controlled by a differential pressure damper or the like so that the required chamber pressure is maintained even when a disturbance such as the above occurs.

  Thus, since a certain amount of room air is exhausted from the clean room at all times, energy can be saved by supplying this exhaust to the warehouse and effectively using it for air conditioning.

  As a mechanism for doing this, theoretically, an air conditioning mechanism in which the downstream side of the exhaust system of the clean room is connected to the supply system of the warehouse can be assumed.

  However, since the clean room is maintained at a temperature of about 23 ° C. and a humidity of about 50% throughout the year as described above, if air having this condition is used for air conditioning of a warehouse in winter, condensation occurs in the warehouse. Therefore, in the winter season, it is necessary to stop the exhaust gas supply operation by an operation such as stopping the exhaust fan or switching the damper.

  However, the clean room is required to strictly control the room pressure, and when the exhaust is used effectively for air conditioning in other air-conditioned spaces, it is an absolute condition that the room pressure should not be disturbed. The above-described exhaust fan stoppage and damper switching operation cannot be performed because they disturb the room pressure.

  Therefore, in the configuration in which the downstream side of the exhaust system of the clean room is directly connected to the supply system of the warehouse, the exhaust of the clean room cannot be effectively used for other air-conditioned spaces.

  The present invention aims to solve such problems. In addition to the clean room described above, the rooms targeted by the present invention include all rooms that require a stable room pressure from a special air conditioning room such as a constant temperature and humidity room to a general air conditioning room.

  In order to solve the above-described problems, in the present invention, an exhaust system of a room where a stable room pressure is required and an air supply system of another air-conditioned space are connected via a chamber opened to the atmosphere. The present invention proposes an exhaust heat recovery air-conditioning mechanism in which an air supply fan can be operated independently of an exhaust fan of an exhaust system.

  In the present invention, the chamber is proposed to be open to the atmosphere through an opening.

  In the present invention, it is proposed that the chamber is open to the atmosphere through an opening provided with a pressure adjusting damper.

  In the present invention, indoor air that requires a stable room pressure is exhausted through an exhaust system by an exhaust fan that is always operating, and is ejected into the chamber.

  At this time, when the air supply fan of the air supply system is in operation, the air blown into the chamber is sucked into the air supply system from the chamber by the air supply fan and flows through the air supply system to other air conditioners. It is supplied to the space and used for air conditioning.

  On the other hand, when the air supply fan of the air supply system is not operated, the air ejected into the chamber is released to the atmosphere without being sucked into the air supply system. In this way, since it is not supplied to the air-conditioned space through the air supply system, it is possible to prevent the occurrence of dew condensation during operation in winter.

  Since the chamber connecting the exhaust system and the air supply system is open to the atmosphere in this way, the exhaust fan of the exhaust system can continue to operate continuously without any trouble, and the air supply of the air supply system Even when the fan shifts from the stopped state to the operating state or from the operating state to the stopped state, the change in the exhaust back pressure in the exhaust system is small and does not disturb the room pressure.

  Thus, in the present invention, a stable room pressure such as a clean room is required in the intermediate period or summer, and the exhaust of the room in which the predetermined air conditioning is performed can be used for air conditioning of another air conditioning space such as a warehouse, The exhaust heat can be recovered and used effectively, and in winter and the like, by preventing the air from the room from being supplied to other air-conditioned spaces, the occurrence of condensation can be prevented.

  In addition to the configuration in which the chamber is opened to the atmosphere through the opening, if the pressure adjusting damper is provided in the opening, the change in the back pressure of the exhaust in the exhaust system can be further reduced, and thus a stable chamber pressure can be obtained. The required impact on the room can be further reduced.

  According to the present invention described above, in various rooms ranging from a special air conditioning room such as a clean room or a constant temperature and humidity room to a general air conditioning room, a stable room pressure is required, and exhaust from a room where predetermined air conditioning is performed. Can be supplied to other air-conditioned spaces for effective use. Therefore, it is possible to reduce the air conditioning equipment cost and the operating cost.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a system diagram conceptually showing a first embodiment of an exhaust heat recovery air-conditioning mechanism of the present invention. Reference numeral 1 in the figure denotes a room such as a clean room where stable room pressure is required. . As described above, the room 1 targeted by the present invention includes, in addition to a clean room, an appropriate room that requires a stable room pressure from a special air conditioning room such as a constant temperature and humidity room to a general air conditioning room.
When the room 1 is a clean room, the indoor air conditions such as temperature and humidity are maintained at, for example, a temperature of about 23 ° C. and a humidity of about 50% throughout the year. The inside of the chamber 1 is managed so as to have a constant positive pressure so as not to be affected by the inflow of air. That is, the chamber 1 is strictly managed so that pressurized air supply and exhaust are always performed and a constant chamber pressure is maintained, and at this time, it is also required when a disturbance such as opening and closing of the door occurs. The exhaust is controlled by a differential pressure damper or the like so that the chamber pressure is maintained. Reference numeral 2 denotes an exhaust system, and the exhaust system 2 is configured to suck and exhaust the air in the chamber 1 through the suction port 4 by an exhaust fan 3. As the configuration of the exhaust system 2, a conventional appropriate configuration in a clean room or the like can be applied.

Next, reference numeral 5 denotes another facility such as a warehouse installed in the vicinity of the room 1, and 6 denotes the air-conditioned space. This facility 5 is a warehouse for products and raw materials such as pharmaceuticals manufactured in a clean room, for example.
Reference numeral 7 denotes an air supply system, and the air supply system 7 is configured to supply air from the air supply port 9 into the air-conditioned space 6 by an air supply fan 8.

  Therefore, in the present invention, the exhaust system 2 and the air supply system 7 are connected via the chamber 10 opened to the atmosphere, and the air supply fan 8 of the air supply system 7 is connected to the exhaust fan 3 of the exhaust system 2. It is configured so that it can be operated independently.

  In the figure, the chamber 10 has a structure in which an opening 11 for opening to the atmosphere is provided on the lower side to prevent intrusion of rainwater or the like.

  In the above configuration, the exhaust fan 3 of the exhaust system 2 is always in operation, and the air in the chamber 1 is sucked from the suction port 4 by the exhaust fan 3, passes through the exhaust system 2, and is ejected into the chamber 10.

  At this time, during the summer and intermediate periods, the air supply fan 8 of the air supply system 7 is operated, so that the exhaust of the chamber 1 ejected into the chamber 10 is supplied from the chamber 10 by the air supply fan 8. The air is drawn into the air-conditioning space 6 of the facility 5 from the air supply port 9 through the air supply system 7 and supplied to the air conditioner.

  In this way, in the middle and summer seasons, a stable room pressure such as a clean room is required, and the exhaust of the room 1 in which predetermined air conditioning is performed can be used for air conditioning of the air conditioning space 6 of another facility 5 such as a warehouse. The exhaust heat can be recovered and used effectively.

  Of course, another facility 5 can be equipped with an air conditioner for that purpose, and the air conditioning space 6 can be air-conditioned in cooperation with the operation of the air supply system 7.

  On the other hand, in the winter season, when it is expected that condensation will occur when the exhaust from the room 1 is supplied to the air-conditioned space 6, the air supply fan 8 of the air supply system 7 stops operation and is air-conditioned only by the air conditioner described above. Air conditioning of the space 6 is performed. Thus, since the exhaust of the chamber 1 is not supplied to the air-conditioned space 6 through the air supply system 7, the occurrence of condensation in the air-conditioned space 6 can be prevented.

  Since the chamber 10 connecting the exhaust system 2 and the air supply system 7 is open to the atmosphere, the exhaust air is dissipated outside the chamber 10 through the opening 11 even if it is not sucked into the air supply system 7. 3 can continue the operation continuously without any trouble, and the exhaust system 2 even when the supply fan 8 of the supply system 7 changes from the stop state to the operation state or from the operation state to the stop state. The change in the back pressure of the exhaust gas is small, so that it does not disturb the chamber pressure of the chamber 1.

Next, FIG. 2 is a system diagram conceptually showing a second embodiment of the exhaust heat recovery air-conditioning mechanism of the present invention. This second embodiment is different from the first embodiment in the configuration of the chamber. The other configurations and operations are the same. Accordingly, in FIG. 2, elements corresponding to those in FIG. 1 of the first embodiment are denoted by the same reference numerals, and redundant description is omitted.
That is, in the second embodiment, the chamber 10 is characterized in that the pressure adjusting damper 12 is provided in the opening 11.

  In the case of this configuration, the exhaust in the chamber 10 is subjected to the action of being maintained at a constant pressure by the pressure adjusting damper 12, so that the supply fan 8 of the supply system 7 is operated from the stopped state as described above. Even when the state changes or the operation state shifts to the stop state, the change in the exhaust back pressure in the exhaust system 2 is further reduced, and therefore the adverse effect on the chamber 1 can be more effectively prevented.

  For example, a differential pressure damper, a check damper, or the like can be used as the pressure adjustment damper 12.

  Since the present invention is as described above, in various rooms ranging from a special air conditioning room such as a clean room or a constant temperature and humidity room to a general air conditioning room, a stable room pressure is required, and from a room where predetermined air conditioning is performed. The exhaust gas can be supplied to another air-conditioned space for effective use. Therefore, it is possible to reduce the air conditioning equipment cost and the operating cost.

1 is a system diagram conceptually showing a first embodiment of an exhaust heat recovery air conditioning mechanism of the present invention. It is a systematic diagram which shows notionally 2nd Embodiment of the waste heat recovery air-conditioning mechanism of this invention.

Explanation of symbols

1 room (clean room, etc.)
2 Exhaust system 3 Exhaust fan 4 Suction port 5 Facility 6 Air-conditioning space 7 Air supply system 8 Air supply fan 9 Air supply port 10 Chamber 11 Opening 12 Pressure adjustment damper

Claims (3)

The exhaust system of the room where stable room pressure is required and the air supply system of another air-conditioned space are connected via a chamber opened to the atmosphere, and the air supply fan of the air supply system is connected to the exhaust fan of the exhaust system Exhaust heat recovery air conditioning mechanism characterized in that it can be operated independently The exhaust heat recovery air conditioning mechanism according to claim 1, wherein the chamber is configured to open to the atmosphere through an opening. The exhaust heat recovery air-conditioning mechanism according to claim 1, wherein the chamber is configured to be opened to the atmosphere through an opening provided with a pressure adjusting damper.

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