JP2007162996A - Air conditioner for paint booth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner for a paint booth provided with an air passage, of which the total length is shortened, as compared with a conventional type air conditioner for a paint booth. <P>SOLUTION: This air conditioner for a paint booth is provided with the air passage, having an outdoor air inflow port and conditioned air flowout port, a preliminary heating/humidifying means and cooling/dehumidifying means, having a preliminary heating/humidifying function and a cooling/dehumidifying function which can be mutually switched over, and arranged in the air passage, and a heating means arranged in the air passage. With regard to air flow in the air passage, the preliminary heating/humidifying means and cooling/dehumidifying means is arranged farther upstream than from the heating means. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

The present invention relates to a coating booth air conditioner.

An air passage having an external airflow inlet and an air-conditioned air outlet, a preheating means, a humidifying means, and a cooling and dehumidifying means which are sequentially arranged in the air passage from the upstream to the downstream with respect to the airflow in the air passage. And an air conditioner for a paint booth characterized by comprising heating means.
In the coating booth air conditioner, in winter, the low temperature and low humidity outside air flowing into the air passage from the outside air flow inlet is preheated by the preheating means as indicated by the solid arrow α in FIG. 1 is humidified as indicated by a solid arrow β in FIG. 1 and then heated by a heating means as indicated by a solid arrow γ in FIG. 1 to be reformed into conditioned air having a temperature and humidity suitable for a painting operation. .
In summer, the hot and humid outside air flowing into the air passage from the outside air flow inlet is humidified by the humidifying means as shown by a broken line arrow δ in FIG. 1, and cooled by the cooling and dehumidifying means as shown by a broken line arrow ε in FIG. It is dehumidified and heated by the heating means as shown by the broken arrow ζ in FIG. 1 to be reformed into conditioned air having a temperature and humidity suitable for the painting operation.
JP-A-9-089350

In the conventional painting booth air conditioner disclosed in Patent Document 1 and the like, the preheating means, the humidifying means, the cooling and dehumidifying means, and the heating means are independent of each other, so that the total length of the air passage is excessive. There is a problem of becoming.
The present invention has been made in view of the above problems, and provides a coating booth air conditioner in which the overall length of the air passage is shortened compared to the conventional coating booth air conditioner disclosed in Patent Document 1 and the like. Objective.

In order to solve the above problems, in the present invention, an air passage having an external air flow inlet and an air-conditioning air outlet, a preheating humidification function and a cooling dehumidification function that can be switched between each other are provided in the air passage. A preheating / humidifying means / cooling dehumidifying means and a heating means arranged in the air passage, and the preheating / humidifying means / cooling / dehumidifying means are arranged upstream of the heating means with respect to the air flow in the air passage. An air conditioner for a painting booth is provided.
In the coating booth air conditioner according to the present invention, in the winter season, the preheating / humidifying means portion of the preheating / humidifying means / cooling / dehumidifying means and the heating means are operated, so that the low temperature and low humidity outside air is suitable for painting work. In the summer, the cooling and dehumidifying means part of the preheating humidifying means and cooling dehumidifying means and the heating means are operated, so that high temperature and high humidity outside air is suitable for painting work. It is reformed to conditioned air having temperature and humidity.
In the coating booth air-conditioning apparatus according to the present invention, the preheating means, the humidifying means, and the cooling and dehumidifying means, which are conventionally independent of each other, are combined into the preheating and humidifying means and the cooling and dehumidifying means, thereby reducing the total length of the air passage. It is shorter than before.

In the present invention, an air passage having an external air flow inlet and an air-conditioning air outlet, a preheating means, a humidifying means disposed in the air passage having a humidifying function and a cooling / dehumidifying function that can be switched between each other. A cooling and dehumidifying means and a heating means disposed in the air passage, and the preheating means is disposed upstream of the humidifying and cooling dehumidifying means with respect to the air flow in the air passage, and the humidifying means and cooling and dehumidifying means. The means is provided upstream of the heating means, and provides an air conditioner for a painting booth.
In the coating booth air-conditioning apparatus according to the present invention, the preliminary heating means, the humidifying means portion of the humidifying and cooling dehumidifying means, and the heating means are operated in winter, and the low-temperature and low-humidity outside air is used for painting work. Air conditioning air having a suitable temperature and humidity is reformed, and in summer, the cooling and dehumidifying means part of the humidifying and cooling dehumidifying means and the heating means are operated, so that high temperature and high humidity outside air is suitable for painting work. It is reformed to conditioned air having temperature and humidity.
In the coating booth air-conditioning apparatus according to the present invention, the humidifying means and the cooling / dehumidifying means, which are conventionally independent from each other, are combined into a humidifying means / cooling / dehumidifying means, thereby reducing the overall length of the air passage. ing.

In a preferred embodiment of the present invention, both the humidifying function and the cooling and dehumidifying function are realized by watering, and the air passage is provided with a first air passage in which air conditioning means other than the heating means are provided, and a heating means. And the cross-sectional area of the first air passage is set to a value smaller than the cross-sectional area of the second air passage.
In the conventional painting booth air conditioner disclosed in Patent Document 1 and the like, the cross-sectional area of the air passage is constant from the external airflow inlet to the conditioned air outlet. A roll filter that removes dust from the air passing through the air passage is disposed in the air passage. If the coating booth air conditioner is configured so that both the humidification function and the cooling and dehumidification function are realized by watering, and the cross-sectional area of the first air passage where watering is performed is narrowed, it can be applied in winter and summer. Since the air passing through the booth air conditioner can be sprayed with high-density water spray, dust in the air can be sufficiently removed only by water spray. As a result, the roll filter can be eliminated, and the overall length of the air passage is further shortened.

In a preferred aspect of the present invention, the first air passage extends vertically, and the second air passage extends horizontally below the first air passage.
In the conventional coating booth air conditioner disclosed in Patent Document 1 and the like, the entire air passage extends horizontally, and there is a problem that low-rise air with much dust is taken into the air passage. By extending the first air passage vertically and extending the second air passage horizontally below the first air passage, it becomes possible to take upper air with less dust into the air passage.

In the coating booth air conditioner according to the present invention, the preheating means, the humidifying means, and the cooling and dehumidifying means, which have been conventionally independent of each other, are combined into the preheating and humidifying means and the cooling and dehumidifying means. It is shortened compared with the past.

A swash plate compressor according to an embodiment of the present invention will be described.

As shown in FIG. 2, the coating booth air conditioner A includes a first air passage 1 that extends vertically and a second air passage 2 that extends horizontally below the first air passage 1. . The upper end of the first air passage forms an external air flow inlet 3. A hood 4 is disposed above the external airflow inlet 3. The lower end of the first air passage 1 is connected to one end of the second air passage 2. The other end of the second air passage 2 forms an air-conditioned air outlet 5. The cross-sectional area of the first air passage 1 is set to a value smaller than the cross-sectional area of the second air passage 2.
A spray 6 is disposed in the first air passage 1. A circulation circuit 7 for circulating water discharged from the spray 6 to the spray 6 is provided. The upstream end of the circulation circuit 7 is connected to a pit 8 formed on the bottom wall of the second air passage below the spray 6. In the middle of the circulation circuit 7, from the upstream end pit 8 to the downstream end spray 6, the strainer 9, the first heat exchanger 10 that cools the circulating water with cold water, the circulating pump 11, and the circulating water is heated with high-temperature steam. The second heat exchangers 12 are sequentially arranged. The members from the spray 6 to the second heat exchanger 12 form a preheating humidifier / cooling dehumidifier 13.
In the second air passage 2, from one end connected to the lower end of the first air passage 1 to the other end forming the air-conditioning air outlet 5, an eliminator 14 for removing water droplets, a heater 15 using high-temperature steam as a heat source, A filter 16 and a fan 17 are sequentially arranged. The exhaust port of the fan 17 is connected to the conditioned air outlet 5.
The conditioned air outlet 5 is connected to a painting booth (not shown) via a duct B.

The operation of the coating booth air conditioner A having the above configuration will be described.
In the winter season, the supply of cold water to the first heat exchanger 10 is stopped, the pump 11 is activated, the high-temperature steam is supplied to the second heat exchanger 12, and the preliminary heating / humidifying device / cooling dehumidifying device 13 is reserved. The portion of the heating / humidifying device is activated, and hot water is sprinkled from the spray 6 in the first air passage 1. Further, the heater 15 and the fan 17 operate in the second air passage 2.
The low-temperature and low-humidity outside air that has flowed into the first air passage 1 from the external airflow inlet 3 is preheated and humidified as shown by a solid arrow a in FIG. It passes through the heater 15 in the air passage 2 and is heated as indicated by a solid line arrow b in FIG. 3 to be reformed into conditioned air having a temperature and humidity suitable for the painting operation.

In the summer, cold water is supplied to the first heat exchanger 10, the pump 11 is activated, the supply of high-temperature steam to the second heat exchanger 12 is stopped, and the cooling and dehumidifying device of the preheating humidifier / cooling dehumidifying device 13 is stopped. This part is activated, and low temperature water is sprinkled from the spray 6 in the first air passage 1. Further, the heater 15 and the fan 17 operate in the second air passage 2.
The hot and humid outside air that has flowed into the first air passage 1 from the external air flow inlet 3 is sprayed with low-temperature water in the first air passage 1 and cooled and dehumidified as indicated by the broken line arrow c in FIG. It passes through the heater 15 in the passage 2 and is heated as indicated by a broken line arrow d in FIG. 3 to be reformed into conditioned air having a temperature and humidity suitable for the painting operation.

In the coating booth air conditioner A, the preheating means, the humidifying means, and the cooling / dehumidifying means, which have been independent of each other in the past, are combined in the preheating / humidifying apparatus / cooling / dehumidifying apparatus 13 so that the total length of the air passage is conventionally increased. It is shorter than that.

In the conventional painting booth air conditioner disclosed in Patent Document 1 and the like, the cross-sectional area of the air passage is constant from the external airflow inlet to the conditioned air outlet. A roll filter that removes dust from the air passing through the air passage is disposed in the air passage. In the coating booth air conditioner A, humidification of low humidity outside air in winter and dehumidification of humid outside air in summer are realized by water spraying from the spray 6, and the cross-sectional area of the first air passage 1 where water spraying is performed is realized. If narrow, the air passing through the air passage can be sprayed with high-density water spray in winter and summer, so that dust in the air can be sufficiently removed only by water spray. As a result, it becomes possible to eliminate the roll filter required in the conventional coating booth air conditioner, and the overall length of the air passage is further shortened.

In the conventional coating booth air conditioner disclosed in Patent Document 1 and the like, the entire air passage extends horizontally, and there is a problem that low-rise air with much dust is taken into the air passage. By extending the first air passage 1 up and down and extending the second air passage 2 horizontally below the first air passage 1, it is possible to take upper air with less dust into the air passage.

When the supply of the high-temperature steam cannot be received, the second heat exchanger 12 is abolished, and the burner is disposed upstream of the spray 6 through the air flow in the air passage 1 as shown by a one-dot chain line in FIG. 18 is disposed. A gas-liquid contact facilitating member 19 such as a wire mesh or a grating is disposed immediately downstream of the spray 6 via the air flow in the air passage 1. The heat source of the heater 15 is also changed to high-temperature combustion gas. The members from the spray 6 to the pump 11 form a humidifier / cooling dehumidifier 13 '.

In the winter season, the burner 18 operates. The supply of cold water to the first heat exchanger 10 is stopped, the pump 11 is activated, the humidifier part of the humidifier / cooling dehumidifier 13 ′ is activated, and water is sprayed from the spray 6 in the first air passage 1. Done. Further, the heater 15 and the fan 17 operate in the second air passage 2.
The low-temperature and low-humidity outside air that has flowed into the first air passage 1 from the outside air flow inlet 3 is exposed to the high-temperature combustion gas of the burner 18 in the first air passage 1, and is preheated as indicated by a one-dot chain line arrow e in FIG. Then, it is sprayed with water and is humidified as shown by a one-dot chain line arrow f in FIG. 3, passes through the heater 15 in the second air passage 2 and is heated as shown by a solid arrow b in FIG. It is reformed to conditioned air having a suitable temperature and humidity.
The arrangement of the gas-liquid contact promoting member 19 increases the contact area between the heated air and the water spray and promotes humidification of the preheated air.

In summer, the operation of the burner 18 stops. Cold water is supplied to the first heat exchanger 10, the pump 11 is operated, the portion of the cooling / dehumidifying device of the humidifying / cooling dehumidifying device 13 'is operated, and the low temperature water is supplied from the spray 6 in the first air passage 1. Is watered. Further, the heater 15 and the fan 17 operate in the second air passage 2.
The hot and humid outside air that has flowed into the first air passage 1 from the external air flow inlet 3 is sprayed with low-temperature water in the first air passage 1 and cooled and dehumidified as indicated by the broken line arrow c in FIG. It passes through the heater 15 in the passage 2 and is heated as indicated by a broken line arrow d in FIG. 3 to be reformed into conditioned air having a temperature and humidity suitable for the painting operation.

In the coating booth air conditioner A according to the second embodiment, the humidifying means and the cooling / dehumidifying means, which are conventionally independent of each other, are combined in the humidifying means / cooling / dehumidifying device 13 ', so that the total length of the air passage is conventionally increased. It is shortened compared to.

The present invention can be widely used for an air conditioner for a painting booth.

It is an air line figure which shows the action | operation of the conventional air conditioner for painting booths. It is an apparatus arrangement | positioning figure of the coating booth air conditioner which concerns on the Example of this invention. It is an air line figure which shows the action | operation of the coating booth air conditioner which concerns on the Example of this invention.

Explanation of symbols

A Air Conditioner for Painting Booth B Duct 1 First Air Passage 2 Second Air Passage 3 External Air Flow Inlet 5 Air Conditioning Air Outlet 6 Spray 7 Circulating Circuit 10 First Heat Exchanger 11 Pump 12 Second Heat Exchanger 13 Preheating Humidifier Cooling and dehumidifying device 13 'Humidifier and cooling and dehumidifying device 15 Heater 17 Fan 18 Burner 19

Claims (4)

An air passage having an external air flow inlet and an air-conditioning air outlet, a preheating humidification function and a cooling dehumidification means disposed in the air passage having a preheating humidification function and a cooling dehumidification function which can be switched with each other; And a heating means disposed in the air passage, wherein the preheating humidifying means and the cooling and dehumidifying means are disposed upstream of the heating means with respect to the air flow in the air passage. apparatus. An air passage having an external airflow inlet and an air-conditioned air outlet, a preheating means, a humidifying and cooling dehumidifying means disposed in the air passage having a humidifying function and a cooling / dehumidifying function that can be switched to each other And a heating means disposed in the air passage, the preheating means being disposed upstream of the humidifying and cooling dehumidifying means with respect to the air flow in the air passage, and the humidifying and cooling dehumidifying means from the heating means An air conditioner for a paint booth, which is also arranged upstream. Both the humidifying function and the cooling and dehumidifying function are realized by watering, and the air passage has a first air passage in which air-conditioning means other than the heating means are provided, and a second air passage in which heating means are provided. The coating booth air conditioner according to claim 1 or 2, wherein the cross-sectional area of the first air passage is set to be smaller than the cross-sectional area of the second air passage. The coating booth air conditioner according to claim 3, wherein the first air passage extends vertically and the second air passage extends horizontally below the first air passage.

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