JP2007240118A - Dew condensation prevention system for attached room of multistory building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent dew condensation in a peripheral attached room of a building such as a clean room by a simple and inexpensive structure. <P>SOLUTION: A dew condensation prevention system for an attached room of a multistory building comprises a supply fan with a heating means installed at least on the ground floor of an attached room annexed to the periphery of a multistory building to take in and heat outside air and supply it to the attached room, a circulating fan with a heating means installed at least on a middle layer of the attached room to heat the air from the lower layers of the attached room and supply it to the upper layers, and an exhaust fan installed at least on the top floor of the attached room to exhaust the air in the attached room out of the building. The ventilative supply of heated outside air of low absolute humidity to the attached room prevents an air temperature drop in the attached room and lowers the absolute humidity of the attached room to prevent dew condensation in the attached room. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a dew condensation prevention system for an annex room of a multi-story building, and in particular, takes measures against dew condensation by heating ventilation for an atrium-like annex attached to the outer periphery of a building such as a clean room formed on the multi-story floor. The present invention relates to a dew condensation prevention system for a multi-storey building.

  2. Description of the Related Art Conventionally, as a method for preventing condensation, a method is known in which indoor air is prevented from being lowered to a dew point temperature or less by increasing the heat insulation of a building.

  For example, the roof, walls, and soil sections that make up a building can be seamlessly formed by in-situ foaming, and an internal ventilation layer and an external ventilation layer can be provided in the wall structure. In order to prevent the deterioration of the cooling and heating efficiency due to the thermal bridge (heat bridge), or the building structure of a highly airtight and highly insulated building (for example, see Patent Document 1 etc.) Thermal insulation of buildings that inserts heat insulating material such as expanded polystyrene foam into the gaps such as hole-down hardware used as bridges to block external heat and prevent condensation in the walls and indoors due to thermal bridges A construction method (see, for example, Patent Document 2) is known.

Also, with recent improvements in building airtightness and thermal insulation performance, air conditioning systems that actively ventilate air are needed. For example, when the outdoor air taken in via the intake passage is heated or cooled by an indoor air conditioner and supplied to each room and common space in the building, intake air heating / cooling means is provided in the intake passage, and intake air heating / cooling is provided. By supplying high-temperature fluid or low-temperature fluid generated by a heat pump type hot water supply device to the preheated or cooled outdoor air flowing through the intake passage, no condensation or icing occurred in the intake heating / cooling section Whole building ventilation air conditioning systems are known (see, for example, Patent Document 3).
JP 2001-98656 A JP 2003-129585 A Japanese Patent Laying-Open No. 2005-30706

  However, in the conventional method of preventing condensation by increasing the heat insulation of the building, the walls, windows, and floors of the building are subject to high heat insulation work, and a large amount of heat insulating material is required. There is a problem of requiring construction. Furthermore, even if high thermal insulation construction is performed, it is difficult to prevent partial dew condensation on the joinery frames such as windows, doors or shutters.

  On the other hand, it is conceivable to prevent the temperature of the indoor air from dropping below the dew point temperature without increasing the heat insulation of the building, but it is not possible to suppress an increase in the absolute humidity of the indoor air. Therefore, there is a problem that the dew point temperature of the indoor air also rises and condensation tends to occur.

  Furthermore, in an air conditioning system that uses a heat pump type hot water supply device as described above to prevent condensation and icing in the intake air heating / cooling section, a heat pump type hot water supply device must be installed, which requires a large equipment configuration. In addition, there is a problem that the cost becomes high.

  The present invention has been made in view of such circumstances, and in particular, condensation that tends to occur in a clean room in a cold district factory or the like, or in a room attached to the outer periphery of a building that employs heating humidification air conditioning that requires comfort. It is an object of the present invention to provide a dew condensation prevention system for an attached room of a multi-story building that can be prevented at a low cost with a simple configuration.

  In order to achieve the above object, the invention according to claim 1 is a system for preventing dew condensation in an ancillary room provided on the outer periphery of a multi-story building, and is provided at least on the first floor part of the ancillary room. An air supply fan provided with heating means for taking in and heating the outside air and supplying it into the attached room, and at least the middle layer of the attached room, and heats the air in the lower part of the attached room to the upper part A circulation fan provided with a heating means for supplying air, and an exhaust fan provided on at least the uppermost floor of the annex room and exhausting the air in the annex room to the outside of the building, and heats the outside air having a low absolute humidity The multi-layer floor is characterized in that, by supplying and ventilating the inside of the attached room, a decrease in the air temperature in the attached room is prevented, and dew condensation in the attached room is prevented by lowering the absolute humidity in the attached room. Condensation prevention system in the building annex To provide.

  This prevents the temperature in the attached room from decreasing and lowers the absolute humidity in the air, so that the attached room provided adjacent to the outer periphery of the multi-storey building, especially the staircase of a clean room in a cold district factory, etc. Condensation that tends to occur in the outer peripheral room of a building adopting heating humidification air conditioning that requires comfort can be prevented at a low cost by a simple configuration.

  According to a second aspect of the present invention, the building is a clean room formed on a multi-story floor, and the auxiliary room is a staircase.

  As described above, the present invention has a great effect in preventing dew condensation in a staircase of a clean room formed on a multilayer floor particularly in a cold region.

  According to a third aspect of the present invention, when the outside air is supplied into the staircase by the air supply fan, the inside of the staircase is pressurized within a range in which the air in the staircase does not flow into the clean room. It is characterized by that.

  Thereby, it is possible to suppress the air having high absolute humidity such as surplus air in the clean room from flowing into the staircase, and it is possible to prevent condensation in the staircase more effectively.

  Further, as shown in claim 4, a sensor for detecting temperature and humidity and an air supply fan provided with heating means are arranged at predetermined locations on each floor of the building, and the temperature and humidity detection results by the sensors are within a predetermined range. The air heated by the air supply fan is blown to the place where the air enters, and the blowing is stopped when the detection result of the temperature and humidity by the sensor deviates from a predetermined range.

  Thereby, it is possible to efficiently prevent dew condensation by detecting a place where dew condensation is likely to occur, not the entire building, and blowing heated air only to that place.

  Moreover, as shown in Claim 5, while arrange | positioning the said sensor in the air retention part of each floor of the said building, air retention is carried out by ventilating heating air from the air supply fan provided with the said heating means in the said air retention part. It is characterized by eliminating the part.

  In particular, it is possible to prevent condensation more effectively by blowing heated air to an air retaining part such as under the stairs where condensation is likely to occur.

  Further, as shown in claim 6, the detection data from the sensor is electrically compared with the wet air diagram data, and the air heated by the air supply fan is blown to the place where the condensation has occurred. When the temperature and humidity detection data by the sensor deviate from the dew condensation generation range, the blowing is stopped.

  Thereby, a place where condensation is likely to occur can be detected, and condensation can be efficiently prevented.

  As described above, according to the present invention, an annex room provided adjacent to the outer periphery of a multi-story building, particularly a cold district, can be prevented by preventing the temperature of the annex room from decreasing and lowering the absolute humidity in the air. Condensation that tends to occur in the staircase of a clean room in a factory, etc., or in a room attached to the outer periphery of a building that employs heating humidification air conditioning that requires comfort can be prevented at a low cost.

  Hereinafter, with reference to the accompanying drawings, a dew condensation prevention system for an attached room of a multi-story building according to the present invention will be described in detail.

  The present invention, for example, in a clean room in a cold factory or the like, or in a door, window and wall surface or floor surface of a peripheral room of a building that employs a heating / humidifying air conditioning system that requires comfort, may cause condensation. The problem is solved by ventilating by supplying heated air under pressure.

  FIG. 1: is a schematic block diagram which shows a part of building which applied the dew condensation prevention system of the attached room of the multi-storey building which concerns on one Embodiment of this invention.

  A building 1 in which the dew condensation prevention system according to the present embodiment shown in FIG. 1 is adopted is formed in a clean room 10 formed over multiple floors in a cold district, and on the outer periphery of the building 1 adjacent to the clean room 10. It is composed of an attached room 12 made up of a stairwell or the like.

  As shown in FIG. 1, an annex room 12 as a staircase provided adjacent to a clean room 10 on a multi-story floor is provided with a plurality of landings 14 alternately, and a plurality of staircases 16 are folded back between the landings 14. As shown in FIG. In addition, the wall surface 13 of the ancillary room 12 is partially glazed, for example, from an aesthetic point of view.

  The clean room 10 has a high humidity (absolute humidity), and in such a building 1, excess air with a high absolute humidity from the clean room 10 flows into the annex room 12, so that condensation occurs in the annex room 12 particularly in winter. There is a problem that occurs.

  This dew condensation is due to the warm air in the clean room 10 being cooled below the dew point temperature by the cold outer wall surface of the attached room 12 provided in the outer peripheral part of the building 1.

  The mechanism of this condensation will be briefly described below.

  FIG. 2 is a moist air diagram showing the properties of air containing steam (humid air). FIG. 2 shows the relationship between the dry bulb temperature and absolute humidity for each relative humidity (% RH), with the horizontal axis representing the dry bulb temperature (° C.) and the vertical axis representing the absolute humidity (kg / kg DA). It is a thing.

Here, dry bulb temperature is air temperature, and absolute humidity is the ratio of the amount of water vapor contained in the air to the dry air unit weight (kg / kg DA (DryAir)), which does not contain any water vapor. Alternatively, it represents the amount of water vapor (g / m ³ ) contained in a unit volume of air, and the relative humidity is usually simply referred to as humidity, and the amount of water vapor contained in the air is saturated at the same temperature as the air. Say ratio to.

For example, referring to FIG. 2, when the air with a relative humidity of 60% RH is seen, when the temperature of the air is 30 ° C., the absolute humidity is 0.016, so the air with an air temperature of 30 ° C. has a relative humidity of 60% RH. Will contain 0.016 g of water vapor in 1 m ³ of this air.

  Further, when a line of 0.016 absolute humidity is traced horizontally, it intersects with a curve of about 21% at a relative humidity of 100% RH. Accordingly, when the temperature of this air (temperature 30 ° C., relative humidity 60% RH) decreases to 21 ° C., the relative humidity becomes 100% RH and the water vapor becomes saturated, so the water vapor contained in the air becomes water droplets. Condensation will begin to appear.

  On the other hand, if the water vapor contained in the air (absolute humidity 0.016) at a temperature of 30 ° C. and a relative humidity of 60% RH is reduced and the absolute humidity is reduced to, for example, 0.008, the relative humidity of this air is 30% RH. Become. This air (temperature 30 ° C, relative humidity 30% RH), when the temperature drops to how many times condensation occurs, follow the line of absolute humidity 0.008 sideways and the intersection with the curve of relative humidity 100% RH Can be found that the temperature is 10 ° C.

  That is, when the absolute temperature is 0.016 (the relative humidity is 60% RH), the air at a temperature of 30 ° C has a dew point of about 21 ° C, and condensation occurs when the temperature drops below 21 ° C. On the other hand, if the water vapor in the air is reduced and the absolute humidity is lowered to 0.008 (the relative humidity is lowered to 30% RH at this time), the dew point temperature is about 10 ° C. and the temperature does not fall below 10 ° C. Condensation does not occur.

  Therefore, as a method for preventing condensation, it is considered effective to lower the dew point temperature by lowering the absolute humidity of the indoor air by heating and supplying outside air having a low absolute humidity for ventilation.

  Returning to FIG. 1 again, a dew condensation prevention system is installed in which the outside air having a low absolute humidity is heated and supplied to the ancillary room 12 provided in the outer periphery of the building 1 where condensation is likely to occur.

  As shown in FIG. 1, the ancillary room 12 is a staircase provided adjacent to the clean room 10 on the multi-story floor. Stairs 16 are formed from the first floor to the top floor, and the staircase portion is blown out. Yes. Usually, such a staircase 16 (and a part or the entire surface of the landing 14) is composed of a grating plate, and the staircase 16 has a shape without a kick plate.

  As described above, the attached room 12 has, for example, a part of the wall surface 18 facing outside from the aesthetic point of view, and is more easily affected by the outside air, and condensation is likely to occur.

  In order to heat and supply the outside air having a low absolute humidity to such an attached room 12, an air supply fan 20 that takes in the outside air having a low absolute humidity is attached to the wall surface 13 of the first floor portion. The outside air taken in by the air supply fan 20 is heated by an electric heater as a heating means attached to the air supply fan 20 and is supplied into the auxiliary chamber 12. Since this heated warm air is light, it flows upward.

  Further, as shown by arrows in the figure, in order to flow this air more efficiently, a circulation fan 22 to which an electric heater as a heating means is attached is provided on the wall surface 13 of the intermediate floor. An exhaust fan 24 is installed on the wall 13 on the top floor.

  As described above, the dew condensation prevention system according to this embodiment includes the air supply fan 20, the circulation fan 22, and the exhaust fan 24 that include the electric heater.

  In the example shown in FIG. 1, these fans are installed on the wall surface 13 of the attached room 12, but the installation location of the fan is not limited to the wall surface 13 in this way.

  For example, these fans (the air supply fan 20, the circulation fan 22, and the exhaust fan 24) may be provided on the ceiling of the auxiliary room 12 or the lower part of the landing 14. In this case, for example, an opening serving as an intake port or an exhaust port may be provided on the wall surface 13 of the attached chamber 12, and the opening may be connected to the supply fan 20 or the exhaust fan 24 by a duct.

  Further, the air supply fan 20 and the circulation fan 22 are provided with a filter for removing the sucked outside air or dust generated in the auxiliary chamber 12 to clean the air.

 In addition, although the concrete numerical value in this embodiment is shown next, this is an example to the last and this invention is not limited to this.

  The clean room 10 is set to, for example, a room temperature of 23 ° C. and a humidity (relative humidity) of 60% RH. At this time, as can be seen from the wet air diagram of FIG. A. And the dew point temperature is 14.8 ° C.

  At this time, the outside air is, for example, a temperature of −5 ° C., a humidity of 88%, and an absolute humidity of 0.0022 kg / kg D.D. A. The dew point temperature is −6.49 ° C.

The air volume of the air supply fan 20, the circulation fan 22 and the exhaust fan 24 is 700 CMH (m ³ / h), and a 3 kW electric heater is attached to each of the air supply fan 20 and the circulation fan 22.

 In this way, by supplying air by heating the outside air having a low absolute humidity by the air supply fan 20 to which the electric heater is attached, the absolute humidity of the air in the attached room 12 is lowered and the room temperature is prevented from being lowered. To do.

  The supplied heated air is efficiently circulated in the auxiliary chamber 12 by the circulation fan 22 to which the electric heater is attached, and an air supply port (the air supply fan 20) and an exhaust port ( The temperature distribution and room temperature drop due to the building load generated with the exhaust fan 24) are prevented, and condensation on the upper wall surface of the building is prevented.

  Further, by exhausting the air in the chamber 12 whose absolute humidity has increased by circulating in the chamber 12 to the outside by the exhaust fan 24, the absolute humidity in the chamber 12 is kept low, Condensation can be prevented by preventing an increase in absolute humidity and a decrease in air in the attached room 12 to a dew point temperature or lower.

  At this time, for example, by adjusting the air volume of the air supply fan 20 and the exhaust fan 24 to pressurize the inside of the auxiliary room 12 when supplying outside air with low absolute humidity, the surplus of the clean room 10 with high absolute humidity is obtained. Condensation can be more effectively prevented by suppressing the inflow of air into the auxiliary chamber 12 and suppressing the increase in absolute humidity and dew point temperature in the auxiliary chamber 12.

  The pressurization of the air in the attached room 12 is conversely that if the air is pressurized too much, the air in the attached room 12 flows into the clean room 10. It is assumed that the excess air does not flow into the attached chamber 12.

  In the embodiment described with reference to FIG. 1 above, the supply fan 20 is provided on the first floor, one circulation fan 22 is arranged on the middle floor, and the exhaust fan 24 is arranged on the top floor. However, the present invention is not limited to such a fan arrangement. For example, these fans may be installed on each floor.

  In addition, a sensor for detecting temperature and humidity and an air supply fan equipped with heating means are arranged at predetermined locations on each floor, and the detected temperature / humidity data is transferred to the humid air line based on the detection result of the temperature / humidity detection sensor. By comparing whether these values are within the predetermined range (condensation occurrence range) where the occurrence of condensation is expected as described above, it is possible to detect where condensation is likely to occur. However, heated air may be blown to such a location. In particular, condensation is likely to occur in a place where the air flow stays, such as under a staircase. Therefore, it is preferable to arrange a temperature / humidity detection sensor in such an air staying part. When it is determined that condensation is likely to occur based on temperature / humidity detection data from the temperature / humidity detection sensor as described above, heated air is blown to the air retention portion. An air retention part can be eliminated and condensation can be prevented more effectively. In these cases, the detection data of the temperature / humidity detection sensor is electrically compared with the wet air diagram data, and if it deviates from the predetermined range where condensation is expected (condensation occurrence range), the heated air is blown. By stopping, condensation can be prevented without waste.

  According to this embodiment, it was possible to prevent condensation in the winter of the attached room 12 as the staircase of the clean room 10 in a cold region at low cost by such simple equipment.

  In the summer, the room temperature of the clean room 10 is 23 ° C., whereas the outside air is 30 ° C., and the outside air is higher so that no condensation occurs in the attached room 12. It is not necessary to drive the dew condensation prevention system of this embodiment.

  As described above, the dew condensation prevention system for the multi-storey building of the present invention has been described in detail. However, the present invention is not limited to the above examples, and various improvements and modifications can be made without departing from the gist of the present invention. Of course, you may also do.

It is a schematic block diagram which shows a part of building which applied the dew condensation prevention system which concerns on one Embodiment of this invention. It is a wet air diagram.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Building, 10 ... Clean room, 12 ... Annex room, 13 ... Wall surface, 14 ... Landing place, 16 ... Staircase, 18 ... Partially wall surface of glass (20), 20 ... Supply fan, 22 ... Circulation fan, 24 ... Exhaust fan

Claims (6)

A system for preventing condensation in an ancillary room provided on the outer periphery of a multi-story building,
An air supply fan provided with a heating means for taking in and heating outside air provided at least in the first floor of the annex room and supplying the air into the annex room;
A circulation fan provided with heating means provided at least in the middle layer of the auxiliary chamber and heating the air in the lower layer in the auxiliary chamber and sending the air to the upper layer;
An exhaust fan that is provided at least on the top floor of the annex room and exhausts the air in the annex room to the outside of the building;
The outdoor air having a low absolute humidity is heated to supply and ventilate the interior room, thereby preventing a decrease in the air temperature in the interior room and reducing the absolute humidity in the interior room. An anti-condensation system for an annex room of a multi-story building characterized by preventing condensation.   The dew condensation prevention system for a multi-storey building according to claim 1, wherein the building is a clean room formed on a multi-layer floor, and the annex room is a staircase.   3. The staircase is pressurized within a range in which air in the staircase does not flow into the clean room when outside air is supplied into the staircase by the air supply fan. Condensation prevention system for multi-storey building annex.   An air supply fan provided with a sensor for detecting temperature and humidity and a heating means is arranged at a predetermined location on each floor of the building, and the air supply fan for a location where the temperature and humidity detection results by the sensor fall within a predetermined range. The multi-storey building annex room according to any one of claims 1 to 3, wherein the heated air is blown and the blowing is stopped when the temperature and humidity detection results by the sensor deviate from predetermined ranges. Anti-condensation system.   The sensor is disposed in an air retention portion of each floor of the building, and the air retention portion is eliminated by blowing heated air from an air supply fan provided with the heating means in the air retention portion. The dew condensation prevention system for an annex room of a multi-story building according to claim 4. The detection data from the sensor is electrically compared with the wet air diagram data, the air heated by the air supply fan is blown to the place where the condensation has occurred, and the temperature and humidity detection data by the sensor 5. The dew condensation prevention system for a multi-storey floor building according to claim 4, wherein the blower is stopped when the dew falls outside the dew condensation generation range.

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