JP4788776B2 - Exhaust system construction method and supply / exhaust system construction method - Google Patents

Description

  The present invention relates to a method for constructing an exhaust system and a method for constructing an air supply / exhaust system for discharging heat dissipated from a heat generating device such as a production apparatus or power consuming equipment installed in a building to the building exterior.

  Conventionally, an air conditioning system as shown in FIG. 1 is generally used in a building such as a factory where a heating device such as a production device is installed.

  As shown in FIG. 1, in the air conditioning system 1, a plurality of air outlets 4 and exhaust ports 5 are provided in the upper part of the building 3 where the heat generating device 2 is installed, and the air outlets 4 and the cold air outlets 7 of the air conditioners 6 are provided. Are connected by the air supply duct 8, the exhaust port 5 and the suction port 9 of the air conditioner 6 are connected by the exhaust duct 10, and air containing hot air generated in the heat generating device 2 installed in the building 3 is exhausted. 5. It introduces into the air conditioner 6 through the exhaust duct 10 and cools it, and blows it out from the outlet 4 through the air supply duct 8, thereby generating hot air generated from the heating device 2 installed in the building 3. Cooling and air conditioning.

  That is, in the air conditioning system 1, air containing hot air generated from the heat generating device 2 is collected by the exhaust duct 10, this is cooled by exchanging heat with the air conditioner 6, and cooled again into the building 3 by the air supply duct 8. , The hot air inside the building 3 is diluted, and the temperature inside the building 3 is lowered.

  As the air conditioner 6, a packaged air conditioner (PAC) is generally used. The air conditioner 6 mainly includes a blower fan (FAN) 6a and a cooling unit 6b that exchanges heat of the air blown from the blower fan 6a and cools it. Although not shown, the cooling unit 6b includes an outdoor unit. Is connected. In the air conditioner 6, the refrigerant recovered by the cooling unit 6 b is introduced into the outdoor unit, and the refrigerant is compressed by a refrigerant gas compressor (compressor), and heat is exchanged with the outside air and the like in the condensing unit, thereby exhausting and cooling the refrigerant. Is circulated to the cooling unit 6b.

  The heat generating device 2 is, for example, an electric furnace. The heat generating device 2 is generally provided with a heat generating device exhaust system 12 separately from the air conditioning system 1 for the purpose of removing gas generated in the heat generating device 2 and cooling the heat generating device 2. The heat generating apparatus exhaust system 12 sucks air in the building 3 to collect heat generated in the heat generating apparatus 2 and discharges the heat to the outside of the building 3.

  In order to balance the exhaust in the building 3 and the supply air in consideration of the exhaust in the exhaust system 12 for the heat generating device, the air conditioning system 1 uses the amount of air exhausted by the exhaust system 12 for the heat generating device. The air is taken in from an outside air intake pipe 11 connected to the exhaust duct 10 and supplied to the air conditioner 6.

  Thus, in the air conditioning system 1, the total amount of air (cold air) blown out from the outlet 4 is larger than the total amount of air exhausted from the exhaust port 5. Therefore, in the air conditioning system 1, although depending on the size of the building 3, the number of the outlets 4 is generally increased to about 3 to 4 times the number of the exhaust ports 5.

  The exhaust port 5 is provided apart from the air outlet 4 in order to avoid the phenomenon (short circuit) that sucks the cold air blown out from the air outlet 4 as it is. In general, the exhaust ports 5 are often provided at four corners of a room apart from the air outlet 4.

  The blower outlet 4 is generally formed in a shape in which a plurality of tapered wings having different diameters are coaxially arranged so that cold air can be blown out in a wide range. The blower outlet 4 is equally provided in the upper part in the building 3 so that cold air can reach the whole inside of the building 3.

  In the air-conditioning system 1, cold air having a large specific gravity is blown out from the air outlet 4 provided above the building 3 to generate an air flow in the building 3 to air-condition the entire building 3. The air containing hot air generated in the heat generating device 2 rises above the building 3 and is exhausted from the exhaust port 5 because the specific gravity is small.

  The prior art document information related to the invention of this application includes the following.

JP 2000-310431 A

  When constructing a factory or the like, it is common to first construct a building (building 3) and construct an air conditioner system 1 and then introduce a heating device 2 such as a production device into the building 3. At this time, the air conditioning system 1 is designed to have a sufficient cooling capacity for an assumed air conditioning load.

  However, in recent years, due to the expansion of the heat generating device 2 due to production expansion or the like, the air conditioning load becomes larger than expected, and the air conditioning load exceeds the cooling capacity of the air conditioner 6 in many cases.

  If the air conditioning load exceeds the cooling capacity of the air conditioner 6 in the air conditioning system 1, even if cold air is blown out from the air outlet 4, the hot air generated in the heating device 2 rises and collides with the cold air and is heated. Therefore, an air flow (downward airflow) does not occur in the building 3, and cold air does not reach the vicinity of the floor surface of the building 3 where workers are present. Furthermore, if the hot air is not sufficiently cooled, the hot air is filled from above the building 3, and eventually the entire inside of the building 3 is filled with hot air.

  Moreover, if the air conditioning system 1 is continuously operated in a state where the air conditioning load exceeds the cooling capacity of the air conditioner 6, the air conditioner 6 continues to operate at the maximum output without being stopped. The blower fan 6a of the air conditioner 6 is not likely to break down because it only rotates and winds around the shaft, but the refrigerant gas compressor (compressor) overheats when used continuously without being paused. It becomes very easy to break down.

  In order to improve such a situation, it is conceivable to add an air conditioner 6. However, it is too costly to add the air conditioner 6 and power consumption increases due to the addition of the air conditioner 6. It is not preferable also from a viewpoint.

  Patent Document 1 proposes a so-called stratified air conditioning system that supplies cold air from below the building 3, collects hot air generated by the heating device 2, and discharges hot air from above the building 3. Unlike the air conditioning system 1 of FIG. 1, this stratified air conditioning system discharges hot air without forcibly cooling it, so it can be said that this stratified air conditioning system is suitable for installing a large number of heating devices 2 inside the building 3 as described above. .

  However, this stratified air conditioning system can be applied when a new building 3 is constructed. However, in order to reconstruct the existing air conditioning system 1 into a stratified air conditioning system, the stratified air conditioning system 1 There is a problem that it requires a large amount of modification and is too expensive.

  Thus, in the existing air conditioning system 1, it is not realistic from the viewpoint of cost to add an air conditioner 6 or apply a stratified air conditioning system.

  Therefore, at present, the air conditioner 6 (refrigerant gas compressor) is frequently repaired and the use of the air conditioner 6 is continued, and the problem of hot air filling the building 3 is left unresolved. Therefore, there has been a demand for a method that can reduce the burden on workers who work in the building 3 and can reconstruct the air conditioning system 1 at low cost.

  The present invention has been made in view of the above circumstances, and an exhaust system construction method and an air supply / exhaust system construction method capable of constructing an exhaust system energy-saving and at low cost based on an existing air conditioning system The purpose is to provide.

  The present invention was devised to achieve the above object, and a plurality of outlets and exhaust outlets are provided in an upper part of a building in which a heating device such as a production apparatus or a power consuming device is installed, and the outlet The air outlet and the cold air outlet of the air conditioner are connected by an air supply duct, and the exhaust port and the air inlet of the air conditioner are connected by an exhaust duct, and air containing hot air generated by a heating device installed in the building is contained. Hot air generated from the heat generating device installed in the building is introduced into the air conditioner through the exhaust port and the exhaust duct and cooled and blown out from the air outlet through the air supply duct. An air conditioning system for cooling and air conditioning is constructed, and then the air conditioning system is reconstructed, the exhaust duct reaching the air inlet of the air conditioner is cut, and the exhaust duct on the exhaust outlet side is closed. The air conditioning The air supply duct from the cold air outlet is cut, the air supply duct on the air outlet side and the exhaust duct on the air conditioner side are connected to form a heat recovery duct, and the air supply duct on the air conditioner side By connecting an external exhaust duct extending to the outdoor part of the building to form an exhaust heat duct, stopping the cold air generation function of the air conditioner and operating only the air blowing function, the heating device installed in the building A method for constructing an exhaust system in which generated air is forcibly exhausted to an outdoor part of the building through the heat recovery duct, the air conditioner, and the exhaust heat duct, using the air outlet as a heat recovery port. is there.

  You may form the outside air entrance for the outside air to penetrate | invade a building interior part under the said building, and a bad place side.

  Further, the present invention provides a plurality of air outlets and exhaust outlets in an upper part of a building in which a heat generating device such as a production apparatus or a power consuming device is installed, and the air outlet duct and the cool air outlet of the air conditioner are connected to the air supply duct. And connecting the exhaust port and the air inlet of the air conditioner with an exhaust duct, and air containing hot air generated by a heat generating device installed in the building through the exhaust port and the exhaust duct. An air conditioning system that cools and air-conditions hot air generated from the heating device installed in the building is constructed by introducing and cooling to an air conditioner and blowing it out from the outlet through the air supply duct. And then reconstructing the air conditioning system, cutting an exhaust duct leading to the air inlet of the air conditioner, cutting an air supply duct from a cold air outlet of the air conditioner, and Air supply duct and air conditioner A heat recovery duct by connecting to an air exhaust duct of the air conditioner, and connecting an external exhaust duct extending to the outdoor part of the building to the air supply duct on the air conditioner side to form a heat exhaust duct. By stopping the cold air generating function and operating only the air blowing function, air containing hot air generated by the heat generating device installed in the building is used as the heat recovery port, the heat recovery duct, and the air conditioner. The exhaust air duct is forcibly exhausted to the outdoor part of the building, and the external air supply duct extending to the outdoor part of the building is connected to the exhaust duct on the exhaust port side to form the external air supply duct. The exhaust duct is connected to an induction duct extending to near the floor surface of the building to supply outside air outside the building to the floor surface of the building through the outside air supply duct and the induction duct. Air supply / exhaust system It is a method of construction.

  The outside air intake side of the outside air supply duct may be disposed below the building and on a sunny place side.

  A pushing fan for pushing outside air into the building may be provided in the outside air supply duct.

  According to the present invention, an effective exhaust system can be constructed at low cost based on an existing air conditioning system, and energy saving can be realized.

It is a schematic sectional drawing which shows the conventional air conditioning system. It is a figure explaining the construction method of the exhaust system of the present invention, and is a schematic sectional view when an exhaust duct and an air supply duct are cut. It is a figure explaining the construction method of the exhaust system of the present invention, and is a schematic sectional view when forming a heat recovery duct. It is a schematic sectional drawing of the exhaust system of this invention. It is a schematic sectional drawing of the air supply / exhaust system of this invention. It is a schematic diagram explaining the air conditioner used for this invention.

  Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

  In the exhaust system construction method according to the present embodiment, when the air conditioning load exceeds the cooling capacity of the air conditioning system due to the addition of a heating device in the building, or when the cooling function of the air conditioning system becomes inefficient For example, the existing air conditioning system is reconstructed.

  The present inventor has made use of an existing air conditioning system, and as a result of repeated examinations to realize an environment where workers feel cool, etc. at low initial cost and low running cost, the air conditioner does not dilute the hot air inside the building. In addition, the exhaust system that lowers the temperature in the building by discharging the hot air to the outside is considered to be the best in terms of energy saving, and the present invention has been achieved.

  First, an example of an existing air conditioning system to which the present invention is applied will be described.

  As shown in FIG. 1, an existing air conditioning system 1 air-conditions a plurality of air outlets 4 and exhaust ports 5 provided in an upper portion of a building 3 in which a heating device 2 such as a production device is installed, and the inside of the building 3. The air conditioner 6 to be connected, the air supply duct 8 that connects the air outlet 4 and the cold air outlet 7 of the air conditioner 6, and the exhaust duct 10 that connects the exhaust port 5 and the suction port 9 of the air conditioner 6 are mainly provided. .

  The air conditioning system 1 introduces air including hot air generated in the heat generating device 2 installed in the building 3 into the air conditioner 6 through the exhaust port 5 and the exhaust duct 10 and cools the air. The hot air generated from the heat generating device 2 installed in the building 3 is cooled and air-conditioned by being blown out from the blowout port 4.

  The air conditioner 6 is a packaged air conditioner (PAC) mainly including a blower fan (FAN) 6a and a cooling unit 6b. The cooling unit 6b is a cooling coil, and an outdoor unit (not shown) is connected to the cooling unit 6b. The refrigerant heat-recovered by the cooling unit 6b is introduced into the outdoor unit and compressed by a refrigerant gas compressor (compressor). The condenser unit is configured to exchange heat with outside air and the like to exhaust heat and cool it, and to circulate it to the cooling unit 6b. Hereinafter, the outdoor unit (including the refrigerant gas compressor) connected to the cooling coil and the cooling coil is collectively referred to as a cooling unit 6b.

  The heat generating device 2 is, for example, an electric furnace. The heat generating device 2 is often provided with a heat generating device exhaust system 12 separately from the air conditioning system 1 for the purpose of removing gas generated in the heat generating device 2 or the like.

  In order to compensate for this exhaust, an external air intake pipe 11 extending to the outdoor part of the building is connected to the exhaust duct 10 in the vicinity of the air conditioner 6, and the air exhausted by the heat generator exhaust system 12 of the heat generator 2. Is supplied to the air conditioner 6.

  In the air conditioning system 1, the exhaust air is exhausted by the heat generating device exhaust system 12 of the heat generating device 2, so the total amount of air (cold air) blown out from the air outlet 4 is larger than the total amount of air exhausted from the air outlet 5. Will also increase. Therefore, in the air conditioning system 1, the number of the outlets 4 is increased to about 3 to 4 times the number of the exhaust ports 5.

  In order to avoid the phenomenon (short circuit) that sucks the cold air blown out from the air outlet 4 as it is, the air outlet 5 is provided apart from the air outlet 4 at, for example, four corners of the room.

  The blower outlet 4 is formed in a shape in which a plurality of tapered wings having different diameters are coaxially arranged so that cold air can be blown over a wide range, and is formed so as to blow cold air from each wing in different directions. . Moreover, the blower outlet 4 is provided in the upper part in the building 3 equally so that cold air can be permeate | distributed to the whole building 3 inside.

  Next, a method of constructing an exhaust system based on the air conditioning system 1 of FIG. 1 when the air conditioning load exceeds the cooling capacity of the air conditioner 6 due to the addition of the heat generating device 2 or the like will be described.

  The hot air generated in the heat generating device 2 rises upward in the building 3 because the specific gravity is small. Therefore, it is preferable that the air containing the hot air generated in the heat generating device 2 is exhausted from above in the building 3.

  As a result of examining a method for efficiently exhausting air including heat generated in the heat generating device 2, the present inventor does not exhaust from the exhaust ports 5 as in the prior art, but compares it with the number of exhaust ports 5. The air containing heat generated in the heat generating device 2 can be efficiently obtained by using the air outlet 4 that is a large number of about 3 to 4 times and is provided uniformly in the upper portion of the heat generating device in the building 3 as a heat recovery port. I found that I could exhaust well.

  That is, in the exhaust system construction method according to the present embodiment, the ducts (the air supply duct 8 and the exhaust duct 10) of the existing air conditioning system 1 are connected, and the air generation function of the air conditioner 6 is stopped to blow the air. By operating only the air, the air containing the heat generated by the heat generating device 2 installed in the building 3 is recovered upward from the outlet 4, that is, the air flow is reversed, and this is recovered via the air conditioner 6. In this method, the air is forcibly exhausted outside the building 3.

  Specifically, as shown in FIG. 2, first, in the existing air conditioning system 1, the exhaust duct 10 reaching the suction port 9 of the air conditioner 6 is cut, and the exhaust duct 10a on the exhaust port 5 side and the air conditioner 6 side are cut off. And the exhaust duct 10b. The cut portion of the exhaust duct 10 a on the exhaust port 5 side is closed by the flat plate 21.

  Further, the air supply duct 8 from the cold air outlet 7 of the air conditioner 6 is cut and divided into an air supply duct 8a on the air outlet 4 side and an air supply duct 8b on the air conditioner 6 side.

  Although not shown, the outside air supply pipe 11 connected to the exhaust duct 10b on the air conditioner 6 side is closed with a flat plate or the like, like the exhaust duct 10a on the exhaust port 5 side.

  Thereafter, as shown in FIG. 3, the heat recovery duct 31 is formed by connecting the air supply duct 8 a on the air outlet 4 side and the exhaust duct 10 b on the air conditioner 6 side. The heat recovery duct 31 connects the air outlet 4 and the air inlet 9 of the air conditioner 6. When connecting the air supply duct 8a on the air outlet 4 side and the exhaust duct 10b on the air conditioner 6 side, it is preferable to connect them using a general method using bolts or caulking fittings.

  Further, as shown in FIG. 4, an external exhaust duct 42 extending to the outside of the building 3 is connected to the air supply duct 8 b on the air conditioner 6 side to form an exhaust heat duct 43. The exhaust heat duct 43 connects the cold air outlet 7 of the air conditioner 6 and the outside of the building 3. When connecting the air supply duct 8b on the air conditioner 6 side and the external discharge duct 42, it is preferable to connect them by a general method using bolts or caulking fittings.

  Further, an outside air entrance 44 for the outside air to enter the inside of the building 3 is formed below the building 3, for example, near the floor and in a place with bad sunlight. Here, the place with bad sunlight means a place where the temperature outside the outside air entrance 44 is the lowest in the surroundings outside the building 3, for example, on the north side of the building 3. is there. When the lower part of the building 3 is affected by the reflection of the ground, the height of the outside air entrance 44 may be adjusted as appropriate.

  In the present embodiment, the case where the outside air entrance 44 is formed in the building 3 will be described. However, as the outside air entrance 44, an entrance of an operator or the like may be used as it is.

  After forming the heat recovery duct 31, the exhaust heat duct 43, and the outside air entrance 44, the cold air generating function of the air conditioner 6 is stopped and only the air blowing function is activated. Thereby, the air containing the hot air generated in the heat generating device 2 installed in the building 3 is used as the heat recovery port 45 as the air outlet 4, and the building 3 through the heat recovery duct 31, the air conditioner 6 and the exhaust heat duct 43. The exhaust system 41 according to the present embodiment is configured to forcibly exhaust to the outside.

  As shown in FIG. 6, the air conditioner 6 includes a cooling fan 6a, a cooling unit 6b including a cooling coil and an outdoor unit (including a refrigerant gas compressor) connected to the cooling coil, a blowing fan 6a, and a cooling unit. A control device 6c connected to 6b, and a power supply device 6d connected to the control device 6c and supplied with power from the outside. The control device 6c controls on / off of power supply from the power supply device 6d to the blower fan 6a or the cooling unit 6b.

  In this embodiment, since the cold air generating function of the air conditioner 6 is stopped and only the air blowing function is operated, power is supplied from the power supply device 6d to the blower fan 6a, and power is not supplied from the power supply device 6d to the cooling unit 6b. The control device 6c is controlled as described above. In other words, power is supplied (switched on) only to the blower fan 6a, and the cooling unit 6b is stopped (switched off). For this reason, for example, even an air conditioner in which the cooling unit 6b is already broken and only the blower fan operates normally can be used as the air conditioner 6 of the present invention.

  In the exhaust system 41, since the cooling unit 6b is not used, the cooling unit 6b can be removed. However, disassembling the existing air conditioner 6 is costly, and removing the cooling unit 6b (cooling coil) reduces the load (air resistance) of the blower fan 6a, causing the blower fan 6a to rotate too much. For this reason, it is preferable to leave the cooling unit 6b without removing it.

  In addition, when a plurality of air conditioners 6 are installed in the existing air conditioning system 1, if the present invention is applied to all the air conditioners 6, excessive ventilation may occur. This is because in the air conditioning system 1, the blower fan 6 a needs to push cold air against the ascending force of air heated in the building 3, so that a certain amount of load is applied to the blower fan 6 a. However, the exhaust system 41 eliminates the load, and the blower fan 6a efficiently discharges air (hot air) in the building 3.

  Therefore, when a plurality of air conditioners 6 are installed, for example, when the number of air conditioners 6 to be used is adjusted so that the number of times of air replacement in the building 3 per hour is about 5 to 20 times. Good. Depending on the size of the building 3, it may be sufficient to use only about half of the air conditioners 6.

  The operation of this embodiment will be described.

  In the exhaust system construction method according to this embodiment, the exhaust duct 10 is cut and the air supply duct 8 is cut, and the air supply duct 8a on the air outlet 4 side and the exhaust duct 10b on the air conditioner 6 side are connected. A heat recovery duct 31 is formed, and an external exhaust duct 42 extending to the outside of the building 3 is connected to an air supply duct 8b on the air conditioner 6 side to form an exhaust heat duct 43. The air containing the hot air generated in the heat generating device 2 installed in the building 3 is made into the heat recovery port 45, the heat recovery duct 31, the air conditioner 6, The exhaust is forcedly exhausted outside the building 3 through the exhaust heat duct 43.

  Thereby, since the exhaust system 41 can be constructed only by connecting ducts based on the existing air conditioning system 1, the exhaust system 41 can be constructed at low cost.

  Moreover, in this embodiment, since the air conditioner 6 operates only a ventilation function without forcibly cooling the hot air inside the building 3 by the air conditioner 6 as in the conventional air conditioning system 1, the air conditioner 6 consumes it. Electric power can be reduced, which is also effective in terms of energy saving.

  Furthermore, the number of exhaust ports 5 is about 3 to 4 times as many as the number of exhaust ports 5, and the outlet 4 provided evenly in the upper part of the building 3 is used as the heat recovery port 45, so that It is possible to collect the hot air as a whole and evenly, and it is possible to efficiently collect the hot air. The blower outlet 4 is generally formed in a shape in which a plurality of tapered wings having different diameters are coaxially arranged so that cold air can be blown out over a wide range. It can be recovered.

  Although it is conceivable to use the exhaust port 5 as a heat recovery port as it is, the number of the exhaust ports 5 is small and is not evenly arranged above the building 3. Have difficulty.

  Moreover, in this embodiment, the outside air entrance 44 for the outside air to enter the inside of the building 3 is formed on the lower side of the building 3 and in a place with bad sunlight. By forming the outside air intrusion port 44, the outside air corresponding to the air exhausted from the heat recovery port 45 can enter the inside of the building 3 through the outside air intrusion port 44.

  That is, the hot air generated in the heat generating device 2 rises due to its low specific gravity, and is easily exhausted from the upper part of the building 3. By this forced exhaust, the hot air is forcibly exhausted from the outside air entrance 44 formed below the building 3. A large amount of air having a specific gravity substantially equal to the air, that is, air having a low temperature flows in.

  Furthermore, by forming the outside air entrance 44 on the side of the place where the sunlight is bad (place where the temperature is the lowest around the building 3), it is possible to make it easier for the outside air having a lower temperature to enter the inside of the building 3, and the building 3 Low temperature air (outside air) can be supplied to the heat generating device 2 such as a production device installed below.

  PMV (Predicted Mean Vote) has been proposed as an indicator of the thermal sensation of the human body, and the thermal sensation of the human body is "temperature", "humidity", "wind speed", "radiation", "clothing amount" It is known that it depends on “momentum”. The outside air entering from the outside air entrance 44 has a higher “temperature” than the cold air-conditioning air, but a large amount of outside air intensively flows into the building 3 and the lower part due to forced exhaust, resulting in an increase in “wind speed”. Therefore, the thermal sensation felt by the human body is not so high. Therefore, it is possible to reduce a burden on an operator who performs work under the building 3.

  In addition, when the present invention is applied to the air conditioning system 1 in which a plurality of air conditioners 6 are installed, the number of operating air conditioners 6, that is, the number of operating FANs can be reduced. Become.

  In the above embodiment, only the outlet 4 is used as the heat recovery port 45, but the exhaust duct 10a on the exhaust port 5 side is connected to the heat recovery duct 31, and both the outlet 4 and the exhaust port 5 are connected to the heat recovery port. You may make it use as 45.

  However, since the exhaust port 5 has a large opening and low air resistance, it can be considered that the heat generating device sucks air only from the exhaust duct 5 that is not below. Therefore, in this case, it is necessary to adjust the air resistance of the exhaust port 5 so that air is equally sucked from both the blower port 4 and the exhaust port 5. However, some exhaust ports 5 cannot be adjusted in opening, and adjustment of air resistance takes time. Therefore, it is preferable not to use the exhaust port 5 for the exhaust system 41.

  Next, the construction method of the air supply / exhaust system according to the present embodiment will be described.

  As shown in FIG. 5, the construction method of the air supply / exhaust system according to the present embodiment is the outside air that extends to the outside of the building 3 in the exhaust duct 10 a on the exhaust port 5 side after the exhaust system 41 of FIG. 4 is constructed. The supply duct 52 is connected to form the outside air supply duct 53, and the induction duct 54 extending to near the floor surface in the building 3 is connected to the exhaust port 5, so that the outside air outside the building 3 is supplied to the outside air supply duct. 53, an air supply system 55 configured to supply air near the floor surface in the building 3 through the exhaust port 5, the induction duct 54.

  In FIG. 5, the heating device 2 is omitted for simplification of the drawing. Although simplified in FIG. 5, the outside air intake side (the right side in the figure) of the outside air supply duct 52 is below the building 3 (near the floor) and is located on the side with poor sunlight (most around the building 3). It is placed on the side where the temperature is low.

  The induction duct 54 may be provided along a wall or a pillar in the building 3, and is preferably arranged at four corners of the building 3. This is because the exhaust ports 5 are often provided at the four corners of the building 3. In FIG. 5, the induction duct 54 is drawn in a straight line, but the induction duct 54 may be bent and piped.

  The distance between the lower end (blowout opening) of the induction duct 54 and the floor surface of the building 3 is preferably 30 cm to 1 m. This is because by supplying outside air having a low temperature near the floor surface, air having a low temperature can be supplied to the feet of the worker or the like, and the temperature experienced by the worker or the like can be lowered.

  The outside air supply duct 53 may be provided with a pushing fan (not shown) for pushing outside air into the building 3. By providing the pushing fan, the outside air can be forced into the vicinity of the floor of the building 3, so that the hot air generated in the heat generating device 2 can be forcibly moved upward in the building 3. This pushing fan may be applied to the case where the airtightness of the building 3 is low and outside air is not efficiently sucked by the air supply system 55, for example, when the ceiling is not formed in the building 3.

  In the construction method of the air supply / exhaust system according to the present embodiment, the air supply system 55 that takes in outside air from the outside of the building 3 using the exhaust duct 10a of the existing air conditioning system 1 is constructed. The air supply system 55 can be constructed at a low cost.

  Moreover, since the induction | guidance | derivation duct 54 which guide | induces air to the floor surface vicinity of the building 3 is provided, external air can be effectively supplied to the downward direction in the building 3. FIG. Thereby, the temperature experienced by the operator or the like can be lowered, and low-temperature air (outside air) can be supplied to the heating device 2 such as a production device installed below the building 3.

  Further, in the air supply / exhaust system 51, the outside air intake side of the outside air supply duct 52 is disposed below the building 3 (near the floor) and on the side of the sun where the sun is bad, and therefore, through the outside air supply duct 53, Outside air having a temperature lower than that inside the building 3 can be supplied. Thereby, an operator's burden etc. can be reduced and the air whose temperature is lower than heat generating devices 2, such as a production apparatus installed under the building 3, can be supplied.

  In the above embodiment, the outside air entrance 44 (or the outside air intake side of the outside air supply duct 52) is arranged below the building 3. However, the present invention is not limited to this, and it is arranged anywhere as long as the outside air can be taken in at a low temperature. May be.

  Moreover, although the said embodiment was the case of the factory in which a production apparatus is installed as a heat generating apparatus, even if it is the case of the installation in which power consumption apparatuses, such as an uninterruptible power supply (UPS), are installed as a heat generating apparatus. good.

DESCRIPTION OF SYMBOLS 1 Air conditioning system 2 Heat generating apparatus 3 Building 4 Outlet 5 Exhaust port 6 Air conditioner 8 Air supply duct 10 Exhaust duct 31 Heat recovery duct 41 Exhaust system 42 External exhaust duct 43 Exhaust heat duct 45 Heat recovery port

Claims (5)

Provided with a plurality of outlets and exhaust outlets in the upper part of the building where a heat generating device such as a production apparatus or power consuming equipment is installed, and connecting the outlet and the cold air outlet of the air conditioner with an air supply duct, The exhaust port is connected to the air intake unit through an exhaust duct, and air containing hot air generated by a heat generating device installed in the building is introduced into the air conditioner through the exhaust port and the exhaust duct. An air conditioning system for cooling and air-conditioning the hot air generated from the heat generating device installed in the building is constructed by cooling and blowing it out from the outlet through the air supply duct, and then the air conditioning system. Is a method of reconstructing
Cutting the exhaust duct leading to the air inlet of the air conditioner, closing the exhaust duct on the exhaust port side, cutting the air supply duct from the cold air outlet of the air conditioner, and the air supply duct on the outlet side Connecting an air duct on the air conditioner side to form a heat recovery duct, and connecting an external exhaust duct extending to the outdoor part of the building to the air supply duct on the air conditioner side to form a heat exhaust duct, By stopping the cold air generation function of the air conditioner and operating only the air blowing function, air containing hot air generated by the heat generating device installed in the building is used as the heat recovery port, the heat recovery duct, An exhaust system construction method characterized by forcibly exhausting air to an outdoor part of the building through the air conditioner and the exhaust heat duct.   The exhaust system construction method according to claim 1, wherein an outside air entrance for allowing outside air to enter the inside of the building is formed below the building and at a place where sunlight is bad. Provided with a plurality of outlets and exhaust outlets in the upper part of the building where a heat generating device such as a production apparatus or power consuming equipment is installed, and connecting the outlet and the cold air outlet of the air conditioner with an air supply duct, The exhaust port is connected to the air intake unit through an exhaust duct, and air containing hot air generated by a heat generating device installed in the building is introduced into the air conditioner through the exhaust port and the exhaust duct. An air conditioning system for cooling and air-conditioning the hot air generated from the heat generating device installed in the building is constructed by cooling and blowing it out from the outlet through the air supply duct, and then the air conditioning system. Is a method of reconstructing
The exhaust duct leading to the air inlet of the air conditioner is cut, the air supply duct from the cold air outlet of the air conditioner is cut, and the air supply duct on the outlet side and the exhaust duct on the air conditioner side are connected. A heat recovery duct is formed, and an external exhaust duct extending to the outdoor part of the building is connected to the air supply duct on the air conditioner side to form an exhaust heat duct, and the cool air generating function of the air conditioner is stopped to blow the air The air containing the hot air generated by the heat generating device installed in the building is used as the heat recovery port, and the heat recovery duct, the air conditioner, and the exhaust heat duct are used. Force exhaust to the outdoor part of the building,
Further, an external air supply duct extending to the outdoor part of the building is connected to the exhaust duct on the exhaust port side to form an external air supply duct, and an induction duct extending to the floor of the building is connected to the exhaust port. And the construction method of the air supply / exhaust system characterized by supplying the external air of a building outdoor part near the floor surface of the said building through the said external air supply duct and the said induction duct.   The method for constructing an air supply / exhaust system according to claim 3, wherein an outside air intake side of the outside air supply duct is arranged below the building and on a sunny place side.   The construction method of the air supply / exhaust system of Claim 3 or 4 which provides the pushing fan for pushing outside air into the said building in the said outside air supply duct.

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