JP2002139236A - Heat recovery system in air supply and exhaust system for production factory - Google Patents

Abstract

PROBLEM TO BE SOLVED: To build a further effective heat recovery system by solving the prob lem that a coolant forced circulation system heat recovery system to recover heat in exhaust gas from a production device requires a conveyance power cost needed so that this system has disadvantage in terms of energy saving and a conventional natural circulation type heat recovery system is constituted only for the purpose of recovering heat, and is not provided with air cleaning and other functions required by production factory or the like. SOLUTION: In the coolant natural circulation type heat recovery system, a heat exchange coil unit 3 (4) is coated with a photo-catalyst and the heat recovery system in a supply exhaust system at a production factory that a means 12 for daylighting to a heat exchange coil unit is constituted is proposed. By providing a heat exchange coil unit with a spray water distribution means 8, a need for its cleaning is automatically performed and cleaning at the time of maintenance is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat recovery system in a supply / exhaust system of a production factory or the like.

[0002]

2. Description of the Related Art Various production plants, including semiconductor factories, have a large amount of waste heat from production equipment, and various heat recovery systems for recovering and effectively utilizing the waste heat are installed. Have been. For example, as a conventional example of a heat recovery system, a refrigerant forced circulation system as shown in FIG.
There is a refrigerant natural circulation type as shown in FIG.
In this case, the exhaust heat does not indicate only the high-temperature exhaust heat, but includes the cold heat in the cooling period.

In the heat recovery system of the forced circulation type shown in FIG. 9, a first heat exchange coil unit b is installed in an exhaust duct a, and a second heat exchange coil unit d is installed in an outside air intake duct c for ventilation. The first and second heat exchange coil units b and d are connected in a loop to form a circulation path e, and the circulation path e is filled with a refrigerant, and the refrigerant is forced by a circulation pump f. It is configured to be circulated through.

In this configuration, the heat of the exhaust gas flowing through the exhaust duct a is recovered by operating the first heat exchange coil unit b as an evaporator, and the second heat exchange coil unit d operates as a condenser. As a result, the heat recovered by the first heat exchange coil unit b is
The heat is released by the heat exchange coil unit d and transmitted to the outside air flowing through the outside air intake duct c, and the heat recovered in the outside air in this manner is effectively used in an external controller or the like.
The refrigerant liquid condensed in the heat exchange coil unit d is forcibly conveyed to the first heat exchange coil unit b by the circulation pump f.

On the other hand, in the heat recovery system of the refrigerant natural circulation system shown in FIG. 10, in order to circulate the refrigerant naturally, the heat exchange coil unit operated as a condenser is necessarily higher than the heat exchange coil unit operated as an evaporator. To place. That is, in this heat recovery system, the first heat exchange coil unit h installed in the outside air intake duct g and operating as a condenser is installed in the exhaust duct i and the second heat exchange coil unit installed as an evaporator. j, and the first and second heat exchange coil units h and j are connected in a loop to form a circulation path k.
This is a configuration in which the circulation path k is filled with a refrigerant and is naturally circulated.

[0006] In this configuration, the second heat exchange coil unit j installed in the exhaust duct i operates as an evaporator to recover the heat of the exhaust flowing through the exhaust duct i, and the second heat exchange coil unit j. The refrigerant evaporated at j rises on one path of the circulation path k, that is, the path on the right side in the figure, and moves to the first heat exchange coil unit h due to the pressure difference. ,
Releasing heat to the outside air flowing through the outside air intake duct g,
The refrigerant itself condenses, and then the condensed refrigerant moves on the other path of the circulation path k by its own weight, reaches the second heat exchange coil unit j, and is circulated.

[0007]

As described above, in the heat recovery system of the forced refrigerant circulation system, a circulating pump for the refrigerant is used, so that a transportation power cost is required, which is disadvantageous in terms of energy saving. In view of the above, an object of the present invention is to solve the problem of such a heat recovery system of a forced refrigerant circulation type by configuring a heat recovery system of a natural refrigerant circulation type.

On the other hand, the conventional refrigerant natural circulation type heat recovery system is configured only for heat recovery.
If the air purification and other functions required in a production factory or the like can be added to this, a more effective heat recovery system can be constructed. Therefore, an object of the present invention is to provide a more effective heat recovery system by adding such a function.

[0009]

In order to solve the above-mentioned problems, according to the present invention, a first heat exchange unit is provided in an exhaust duct to install a first heat exchange coil unit, and an outside air for ventilation is provided. A second heat exchanging unit is formed in the intake duct, a second heat exchanging coil unit is installed, and the first and second heat exchanging coil units are connected in a loop to form a circulation path, and a circulation path is formed. The path is filled with a refrigerant, and the heat exchange coil unit installed on the upper side is operated as a condenser, and the heat exchange coil unit installed on the lower side is operated as an evaporator. The heat exchange coil unit is coated with a photocatalyst, and the first and second heat exchange units are provided with a heat recovery system in a supply / exhaust system of a production factory or the like which constitutes a lighting unit for the heat exchange coil unit. Suggest.

According to the present invention, in the above configuration, the daylighting means may be configured such that an inner surface of a portion of the duct outside of the heat exchange coil unit is a mirror surface, or a portion of the duct outside of the heat exchange coil unit. It is proposed that at least a part of is configured to be translucent.

In the present invention, it is proposed that the heat exchange coil unit be provided with a spray sprinkler for spraying water supplied by the water supply unit.

Further, according to the present invention, in the above configuration,
It is proposed that a part of the heat transfer tube of the heat exchange coil unit has a double tube structure in which small-diameter inner tubes are installed concentrically.

Further, the present invention proposes to provide a refrigerant reserve tank in the circulation path in the above configuration.

Further, according to the present invention, in the above configuration,
In the exhaust duct and the outside air intake duct, it is proposed to configure a switching duct mechanism upstream and downstream of the heat exchange coil unit.

According to the present invention, heat can be recovered in the air supply / exhaust system of a production factory or the like by the natural circulation of the refrigerant, and in addition, the heat exchange coil unit installed in the duct is exposed to light by the lighting means. The action of the active oxygen generated by the coated photocatalyst, that is, the action of the decomposition of organic substances and odor components, the action of sterilization, etc., can be used to purify the outside air passing through the outside air intake duct in the heat exchange coil unit. .

If the water supplied by the water supply unit is sprayed to the heat exchange coil unit by spraying and spraying, a so-called self-cleaning effect can be exhibited by the interaction with the photocatalyst.
It is possible to reduce the adhesion of dirt and to collect latent heat.

A part of the heat transfer tube of the heat exchange coil unit is
By adopting a double-pipe structure in which the small-diameter inner pipes are installed concentrically, heat exchange between the exhaust gas and the refrigerant is adjusted, so that a decrease in thermal efficiency can be prevented.

By providing a refrigerant reserve tank in the circulation path, it is possible to follow fluctuations in the heat of the exhaust gas and the outside air.

Further, by providing a switching duct mechanism upstream and downstream of the first and second heat exchange coil units, it is possible to recover hot and cold heat.

[0020]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows the first embodiment of the heat recovery system of the present invention.
FIG. 2 is a system diagram conceptually showing an embodiment of the present invention, and FIG. 2 is a conceptual perspective view showing an embodiment of a heat exchange coil unit. In FIG. 1, the arrangement of the components is generally shown in an elevational view. In the drawing, reference numeral 1 denotes an exhaust duct from a production device of a production plant or the like to the outside, and 2 denotes an outside air intake duct for ventilation from the outdoors to the air conditioner. A first heat exchange unit is provided to install the first heat exchange coil unit 3, and a second heat exchange unit is provided near the outdoor end of the outside air intake duct 2 to form a second heat exchange coil. Unit 4 is installed.
As shown in the figure, the second heat exchange coil unit 4 is disposed above the first heat exchange coil unit 3. The first and second heat exchange coil units 3 and 4 are connected by pipes in a loop to form a circulation path 5, and the circulation path 5 is filled with a refrigerant. Reference numeral 6 denotes a water supply unit, and a water supply pipe 7 connected to the water supply unit 6 is extended into the first and second heat exchange coil units 3 and 4 to constitute a spray watering unit 8. As shown in FIG.
The heat exchange coil units 3 and 4 are composed of a heat transfer tube 9 and a fin 1
A drain receiver 11 for receiving water sprayed and sprayed on the heat transfer tube 9 and the fins 10 by the spraying and spraying unit 8 is provided below.

In the above configuration, in the present invention, the first,
The heat transfer tubes 9 and the fins 10 of the second heat exchange coil units 3 and 4 are coated with a photocatalyst such as titanium oxide, and the exhaust duct 1 and the outside air intake duct 2 have lighting means for the heat exchange coil units 3 and 4. 12.

FIG. 3 shows a first embodiment of the daylighting means 12. In the ducts 1 and 2, portions 1o and 2o on the outdoor side of the heat exchange coil units 3 and 4 are indoors. This is the configuration in the case where it is located. In this embodiment, the inner surfaces of the outdoor portions 1o and 2o of the ducts 1 and 2 are mirror-finished, the transparent hood 13 is connected to the open end thereof, and the lighting reflector 14 is provided in the transparent hood 13. Has been installed.

In this configuration, the sunlight passes through the transparent hood 13 located outdoors, and enters the inner surfaces of the portions 1o and 2o of the ducts 1 and 2 directly or through reflection on the lighting reflector 14. The light is reflected by the inner mirror surface and is projected onto the photocatalyst coating the heat transfer tubes 9 and the fins 10 of the heat exchange coil units 3 and 4.

Next, FIG. 4 shows a second embodiment of the daylighting means 12, which is a portion 1o, 2 of the ducts 1, 2 on the outdoor side of the heat exchange coil units 3, 4.
This is the configuration when o is located outdoors. In this embodiment, the outdoor portions 1o and 2o of the ducts 1 and 2 are:
At least a part thereof is configured to emit light. That is,
In the illustrated embodiment, the inner surfaces of the portions 1o and 2o are mirror-finished in the same manner as in the above embodiment, and a small light-projecting window 15 is provided on a part of the upper surface.

In this configuration, the sunlight passes through the small window 15 on the upper surface of the portions 1o and 2o located outdoors and transmits the portions 1o and 2o.
The light enters the inner surface of 2o, is reflected by the mirror surface of the inner surface, and is projected on the photocatalyst coated on the heat transfer tubes 9 and the fins 10 of the heat exchange coil units 3 and 4 as described above.

In the second embodiment, the small window 15 can be formed not only on the upper surface but also on the side surface and the like, and all of the outdoor portions 1o and 2o of the ducts 1 and 2 can be made of light-transmitting material. In this configuration, sunlight is transmitted through the outdoor portions 1o and 2o of the ducts 1 and 2 and is directly projected on the photocatalyst coated on the heat transfer tubes 9 and the fins 10.

Further, the daylighting means 12 can be constituted by making a part or all of the ducts 1 and 2 in which the heat exchange coil units 3 and 4 are installed translucent.

Next, the heat recovery operation according to the present invention will be described first. The high-temperature exhaust gas from the production device flows through the exhaust duct 1 and passes through the first heat exchange coil unit 3, where it exchanges heat with the refrigerant in the heat transfer tube 9 to evaporate the refrigerant. Is reduced, and the air is exhausted to the outside through the outdoor portion 1o. The refrigerant evaporates in the first heat exchange coil unit 3 and rises along the path 5b on one side of the circulation path 5 to reach the second heat exchange coil unit 4, where it exchanges heat with the outside air to be heated to the outside air. And itself condenses. That is, the outside air flows from outside into the outside air intake duct 2 via the outdoor side portion 2o, passes through the second heat exchange coil unit 4, and at this time, the temperature increases due to heat exchange with the refrigerant, and the outside air It flows through the intake duct 2 and goes to an external conditioner (not shown). Thus, in the external controller, the heat recovered from the high-temperature exhaust gas can be used for air conditioning and the like. On the other hand, the second
The refrigerant condensed by heat exchange with the outside air in the heat exchange coil unit 4 flows down the path 5 a on the other side of the circulation path 5 by its own weight and returns to the first heat exchange coil unit 3.

In the above configuration, if the reserve tank 16 is installed in the path 5a through which the condensed refrigerant flows down as shown by the two-dot chain line in the figure, the above operation, that is, the heat pump operation, causes Circulation volume,
Therefore, the amount of heat to be exchanged can be made to follow a change in the temperature of the exhaust gas or the temperature of the outside air.

Further, in the above configuration, as shown in FIG. 5, at least a part of the heat transfer tube 9 of the heat exchange coil unit 3 operating as an evaporator is a double tube structure in which the small-diameter inner tube 17 is installed concentrically. By doing so, the heat exchange between the exhaust gas and the refrigerant is adjusted, so that a decrease in thermal efficiency can be prevented.

As described above, according to the present invention, heat can be recovered in the air supply / exhaust system of a production factory or the like by natural circulation of the refrigerant. , 4 heat transfer tubes 9 and fins 1
0 and a photocatalyst, and a lighting device 12 is provided as shown in the configuration of FIG. 3 or FIG. It is projected on the photocatalyst coated on the surface, and the photocatalyst works in this way, so that the action of the generated active oxygen, that is, the action of decomposing and sterilizing organic substances and odor components can be exhibited.

Therefore, in the heat exchange coil unit 4 installed on the side of the outside air intake duct 2, an effect of purifying the outside air to be taken can be expected.

In any of the heat exchange coil units 3 and 4 on either side, the decomposition effect and hydrophilicity of the photocatalyst make it difficult for dirt to adhere to the heat transfer tubes 9 and the fins 10, and dirt is removed by water. It will be easy to flush.

That is, in the above embodiment, when the water supply unit 6 is operated to spray water for washing from the spray watering unit 8 to the heat exchange coil units 3 and 4 via the water supply pipe 7, the hydrophilicity of the photocatalyst is improved. Accordingly, the dirt can be easily washed off, and a so-called self-cleaning effect by the photocatalyst can be exhibited.

If the spray units 8 are provided in the heat exchange coil units 3 and 4 as described above, the water supply units 6
, It is possible to easily remove contaminants attached to the heat transfer tubes 9 and the fins 10 of the heat exchange coil units 3 and 4 by the operation up to that time, and cleaning at the time of maintenance is not required. . Further, the heat exchange coil unit 4 installed on the side of the outside air intake duct 2 also helps in purifying the outside air to be taken in this point as well.

However, when cleaning or the like at the time of maintenance or maintenance is permitted, as shown in FIG. 6, the heat exchange coil units 3 and 4 are provided with the spray water spray unit 8 as shown in FIG.
Need not be provided.

In the above description, the heat recovery system of the present invention is operated by recovering the heat of the high-temperature exhaust gas to the outside air and effectively using the heat in the external controller.
The present invention, as will be described later, recovers the heat of low-temperature exhaust gas, that is, cold heat to outside air, and can effectively use this in an external air conditioner. In such an operation,
By spraying and spraying water on the heat transfer tubes and fins of the heat exchange coil unit operated as a condenser, the latent heat can be recovered.

FIGS. 7 and 8 are system diagrams conceptually showing a second embodiment of the heat recovery system according to the present invention. This heat recovery system is capable of recovering hot and cold heat and operates all year round. Is made possible. 20 is a production factory,
Here, a clean room is shown, and 21 is a production device. Reference numeral 22 denotes an outside air conditioner that processes outside air supplied to the clean room 20. Reference numeral 23 denotes an exhaust duct from the production device 21, and reference numeral 24 denotes an outside air intake duct from the external conditioner 22 to the clean room 20. on the other hand,
Reference numeral 25 denotes an exhaust fan, to which an outdoor portion of the exhaust duct 23 is connected. Reference numeral 26 denotes an outside air intake, to which an outside air intake duct 24 is connected.

Reference numerals 27 and 28 denote first and second heat exchanging portions, respectively, formed in ducts. The first heat exchanging portion 27 is disposed at a position higher than the second heat exchanging portion 28. . Then, first and second heat exchange coil units 29 and 30 are installed in these first and second heat exchange units 27 and 28, respectively, and these first and second heat exchange coil units 29 and 30 are installed.
30 is connected in a loop to form a circulation path 31;
The circulation path 31 is filled with a refrigerant. As in the above-described embodiment, the heat transfer tubes and the fins of the first and second heat exchange coil units 29 and 30 are coated with a photocatalyst such as titanium oxide, and the first and second heat exchange coils are also provided. The units 27 and 28 constitute a lighting unit (not shown).
The daylighting means may employ any of the above-described configurations such as the configurations shown in FIGS. 3 and 4, and may further include a duct portion forming the first and second heat exchange units 27 and 28. It can also be configured to be translucent. In addition, the first and second heat exchange coil units 29 and 30 can apply any of the above-described configurations.

In the above configuration, the exhaust duct 23 branches off on the side of the production apparatus 21 and the dampers 32a, 32b
Are connected to one side of the first and second heat exchange units 27 and 28, that is, to the production device 21 side, through the paths 23a and 23b having the first and second heat exchange units, respectively. Paths 32c and 32d that are connected to the other side of 27 and 28, that is, the outdoor side, and have dampers 32c and 32d, respectively, merge. On the other hand, the outside air intake duct 24 branches off on the outdoor side and passes through the first and second heat exchange units 2 via paths 24a and 24b having dampers 33a and 33b, respectively.
7 and 28, and on the production apparatus 21 side, paths 24c and 24d respectively connected to one side of the first and second heat exchange units 27 and 28 and having dampers 33c and 33d, respectively. Are merged.

Next, the operation of this embodiment will be described. First, FIG. 7 shows the operation state in winter, and among the dampers, the damper 32 not hatched in the figure.
b, 32d, 33c, and 33a are open, and the hatched dampers 32a, 32c, 33b, and 33d are closed. In this state, the high-temperature exhaust gas from the production device 21 reaches one side of the lower second heat exchange unit 28 through the path 23b of the exhaust duct 23, and the second heat exchange unit 2
8 to exchange heat with the refrigerant of the second heat exchange coil unit 30, and then from the other side of the second heat exchange unit 28 to the path 23.
d, the air is exhausted outside by the exhaust fan 25 through the outdoor portion of the exhaust duct 23. The above exhaust flow is indicated by a solid line in the figure. On the other hand, the outside air flowing in through the outside air intake 26 is
a to the other side of the upper first heat exchange unit 27, and flows through the first heat exchange unit 27 to exchange heat with the refrigerant of the first heat exchange coil unit 29. Heat exchange unit 27
From one side to the external conditioner 22 via the path 24c, and after being processed in the external conditioner 22, is supplied into the clean room 20. The flow of the outside air described above is indicated by a broken line in the figure. In the above operation, the refrigerant in the second heat exchange coil unit 30 that has exchanged heat with the exhaust gas in the second heat exchange section 28 evaporates by removing the heat of the exhaust gas, and
The first heat exchange coil unit 29 of the first heat exchange unit 27 rises along a path on one side of the first heat exchange unit 27 as shown by a two-dot chain line in the figure.
Here, heat is released to the outside air and condenses itself, and the other side of the circulation path 31 descends as shown by a one-dot chain line in the figure, and the second heat of the second heat exchange unit 28 It returns to the exchange coil unit 30 and is used for circulation. By the above operation, the heat of the high-temperature exhaust gas discharged from the production device 21 through the exhaust duct 23 is recovered, and the temperature of the external air taken in through the external air intake duct 24 from the outside air intake 26 for ventilation is raised. Thus, the amount of heat to be processed by the external conditioner 22 due to intake of outside air having a temperature lower than a predetermined temperature of the air supplied to the clean room 20 can be reduced.

Next, FIG. 8 shows an operation state in the summer season. Among the dampers, dampers 32b, 32d, 33c, and 33a indicated by hatching in the figure are closed, and dampers 32a without hatching are indicated. 32c, 33b, 33
d is open. In this state, the low-temperature exhaust gas from the production device 21 reaches one side of the upper first heat exchange unit 27 through the path 23a of the exhaust duct 23, and flows through the first heat exchange unit 27. First heat exchange coil unit 29
After exchanging heat with the refrigerant, the air is exhausted to the outside by the exhaust fan 25 from the other side of the first heat exchange unit 27 through the path 23c and the outdoor part of the exhaust duct 23. The flow of the exhaust gas described above is indicated by a solid line in FIG. On the other hand, the high-temperature outside air that has flowed in through the outside air intake 26 passes through the path 24b of the outside air intake duct 24 to reach the other side of the lower second heat exchange unit 28, and the second heat exchange unit 28 To exchange heat with the refrigerant of the second heat exchange coil unit 30, and then from one side of the second heat exchange unit 28 to the path 2
After passing through 4d, it reaches the external conditioning machine 22. After being processed in this external conditioning machine 22, it is supplied into the clean room 20. The flow of the outside air described above is also indicated by broken lines in the figure, as in FIG. In the above operation, the refrigerant in the second heat exchange coil unit 30 that has exchanged heat with the exhaust gas having a high temperature in the second heat exchange unit 28 evaporates by removing the heat of the outside air, and the one side of the circulation path 31 Rises as shown by the two-dot chain line in the figure to reach the first heat exchange coil unit 29 of the first heat exchange unit 27, where heat is released to the exhaust gas having a low temperature and condenses itself. Then, the path on the other side of the circulation path 31 descends as shown by a dashed line in the figure, returns to the second heat exchange coil unit 30 of the second heat exchange unit 28, and is subjected to circulation. By the above operation, the exhaust duct 2 is
The heat of the low-temperature exhaust gas discharged through the air outlet 3, i.e., the cold heat, can be recovered and used for cooling the outside air taken in from the outside air intake 26 through the outside air intake duct 24 for ventilation, and thus the clean room The amount of heat to be processed by the external conditioner 22 at the time of taking in outside air having a temperature higher than the required temperature at 20 can be reduced.

As can be seen from the above description, in this embodiment, the upper first heat exchange coil unit 29 is used as a condenser and the lower second heat exchange coil unit is operated in both winter and summer. By operating the heat exchange coil unit 30 as an evaporator, the heat and cold heat of the exhaust gas can be recovered to the outside air and used effectively by natural circulation of the refrigerant.

Also in this embodiment, similarly to the above-described embodiment, the heat transfer tubes and the fins of the first and second heat exchange coil units 29 and 30 are coated with a photocatalyst such as titanium oxide. In addition, since the first and second heat exchanging units 27 and 28 constitute daylighting means (not shown), the photocatalyst can exert an action such as decomposition and sterilization of organic substances and odorous components. In the same manner as described in the above-described embodiment, the effect of purifying the outside air to be taken in, the effect of making it difficult for dirt to adhere, and the effect of easily removing dirt with water can be exhibited.

In this embodiment, if the spray units are provided in the heat exchange coil units 29 and 30, contaminants adhering to the heat transfer tubes 9 and the fins 10 can be easily removed. In addition to the effect that cleaning at the time is not required, it is possible to spray water to the heat exchange coil unit operated as a condenser, that is, the heat transfer tube 9 and the fin 10 of the first heat exchange coil unit 29 in the summer operation. By doing so, the latent heat can be recovered.

[0046]

As described above, the present invention has the following effects. a. Heat (including cold heat) in exhaust gas from a production device such as a production factory can be recovered and used effectively by a natural circulation system without using a refrigerant circulation pump unlike a refrigerant forced circulation system. b. By the action of the photocatalyst coated on the heat exchange coil unit, the taken-in outside air can be purified. c. Due to the action of the photocatalyst coated on the heat exchange coil unit, the heat exchange coil unit is less likely to be soiled, and the soil can be easily washed off with water and removed. d. By providing a spray watering unit in the heat exchange coil unit and performing spray watering as needed, cleaning of the heat exchange coil unit at the time of maintenance can be eliminated.

[Brief description of the drawings]

FIG. 1 is a system diagram conceptually showing a first embodiment of a heat recovery system of the present invention.

FIG. 2 is a conceptual perspective view showing a first embodiment of the heat exchange coil unit.

FIG. 3 is a conceptual perspective view showing a first embodiment of the daylighting means.

FIG. 4 is a conceptual perspective view showing a second embodiment of the daylighting means.

FIG. 5 is a conceptual perspective view showing a second embodiment of the heat exchange coil unit.

FIG. 6 is a conceptual perspective view showing a second embodiment of the heat exchange coil unit.

FIG. 7 is a system diagram conceptually showing a heat recovery system according to a second embodiment of the present invention.

FIG. 8 is a system diagram conceptually showing a second embodiment of the heat recovery system of the present invention at an operation different from that in FIG.

FIG. 9 is a conceptual system diagram showing a conventional heat recovery system of a refrigerant forced circulation system.

FIG. 10 is a conceptual system diagram showing a conventional heat recovery system of a natural refrigerant circulation system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Exhaust duct 1o Outdoor side part 2 Outdoor air intake duct 2o Outdoor side part 3 1st heat exchange coil unit 4 2nd heat exchange coil unit 5 Circulation path 6 Water supply unit 7 Water supply pipe 8 Spray water spray part 9 Heat transfer pipe 10 Fin 11 Drain receiver 12 Lighting means 13 Transparent hood 14 Reflector for lighting 15 Small window 16 Reserve tank 17 Small inner pipe 20 Clean room 21 Production equipment 22 External controller 23 Exhaust duct 23a, 23b, 23c, 23d Route 24 Outside air intake duct 24a , 24b, 24c, 24d path 25 exhaust fan 26 outside air intake 27 first heat exchange section 28 second heat exchange section 29 first heat exchange coil unit 30 second heat exchange coil unit 31 circulation path 32a, 32b , 32c, 32d Dampers 33a, 33b, 33c, 33d Bumpers

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F28D 15/02 101 F28D 15/02 101K 15/06 F28G 9/00 M F28G 9/00 F28D 15/02 105D (72) Inventor Hiroshi Ito F-term (reference) 3L058 BE02 BG03 BG05 in 1-25-1, Nishishinjuku, Shinjuku-ku, Tokyo

Claims (7)

[Claims] 1. A first heat exchange unit is formed in an exhaust duct to install a first heat exchange coil unit, and a second heat exchange unit is formed in a ventilation outside air intake duct to form a second heat exchange unit. A heat exchange coil unit is installed, the first and second heat exchange coil units are connected in a loop to form a circulation path, and the circulation path is filled with a refrigerant. The coil unit is operated as a condenser, and the heat exchange coil unit installed on the lower side is operated as an evaporator. The first and second heat exchange coil units are coated with a photocatalyst.
A heat recovery system in a supply / exhaust system of a production factory or the like, wherein the first and second heat exchange units are provided with lighting means for a heat exchange coil unit. 2. The heat recovery system in a supply / exhaust system of a production plant or the like according to claim 1, wherein the lighting means is configured such that an inner surface of a portion of the duct outside of the heat exchange coil unit is a mirror surface. 3. A light source for a production plant or the like according to claim 1, wherein the daylighting means is configured so that at least a part of a portion of the duct outside the heat exchange coil unit is translucent. Heat recovery system in exhaust system 4. The production plant according to claim 1, wherein the heat exchange coil unit is provided with a spray watering unit for spraying water supplied by the water supply unit. Heat recovery system for air supply and exhaust systems 5. The heat exchanger according to claim 1, wherein a part of the heat transfer tube of the heat exchange coil unit has a double tube structure in which small-diameter inner tubes are installed concentrically. Heat recovery system in the supply and exhaust system of production factories, etc. 6. A heat recovery system in a supply / exhaust system of a production plant or the like according to claim 1, wherein a reserve tank for the refrigerant is provided in the circulation path. 7. The production according to any one of claims 1 to 6, wherein a switching duct mechanism is configured in the exhaust duct and the outside air intake duct on the upstream side and the downstream side of the heat exchange coil unit. Heat recovery system for supply and exhaust systems in factories, etc.