JPS60190259A - Air conditioning apparatus - Google Patents

Abstract

PURPOSE:To prevent painting inferiority such as repellency or blister caused by the generation of water droplets by uniformly heating air, by providing a hot air generator for directly supplying hot air as a heating means in an air intake side. CONSTITUTION:A hot air generator 6 for directly supplying hot air is provided in an air intake side and the temp. of hot air blown into a container main body 1 from the hot air generator 6 is regulated corresponding to the variation in the heating load of air taken into said main body 1 to enable the uniform heating of air passing through the container main body 3 of an air conditioning apparatus 1. By this mechanism, in performing humidification by a humidifier 7 wherein steam is directly sprayed to a temp. conditioned gaseous mixture, humidification can be performed without generating partial oversaturation and, therefore, the generation of water droplets in conditioned air supplied into a painting booth is prevented and painting inferiority caused by water droplets is avoided.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner used to adjust the temperature and humidity inside a paint booth.

[Prior art]

In general, the quality of the paint finish depends on the temperature and humidity inside the paint booth, so the quality of the paint finish will depend on the temperature and humidity inside the paint booth.
In a painting booth that paints objects to be painted, it is required not only to remove dust from the supplied air, but also to strictly control temperature and humidity.

For this reason, conventionally, an air conditioner as shown in FIG. 3 has been widely used. In FIG. 3, reference numeral 50 denotes an air conditioner, and this air conditioner 50 is provided with a gear 52 on the air intake side of a container body 51, and an air supply fan 53 on the discharge side. A roll filter 54 made of nonwoven fabric, a heater 55 that supplies heat to the atmosphere by supplying steam to the heat transfer tube, and a humidifier 56 that directly sprays steam are arranged from the gear 52 side toward the air supply fan 53 side. The heater 55 and humidifier 56 are arranged in sequence, and are connected to a steam supply source 58 through supply pipes 57a and 57b.

The air taken into the container body 51 from the gear gallery 52 is purified by removing dust when it passes through the roll filter 54, and is heated by the steam flowing inside the heat transfer tube when passing through the heater 55. Be warmed. When the heated air passes through the humidifier 56, steam is ejected t9r and humidified, and the air is supplied to the painting booth as conditioned air adjusted to a predetermined temperature and humidity.

However, in such an air conditioner, when the heat load on the heater 55 is small, the heater 55 is
The temperature distribution of the air that has passed through the air becomes uneven. For this reason, the steam sprayed from the humidifier 56 becomes partially supersaturated, and it becomes small water droplets that fly into the painting booth.
However, there is a problem in that the water droplets land on the surface of the object to be coated, causing defects in the coating of brushes, blisters, etc.

[Purpose of the invention]

The present invention was made to solve the above-mentioned problems, and its purpose is to drain the air taken into the container body (
To provide an air conditioner that can prevent the generation of water droplets and prevent coating defects such as splashing and blistering by directly heating with one wind.

[Structure of the invention]

In order to achieve the above object, the configuration of an air conditioner according to the present invention is an air conditioner that supplies clean air whose temperature and humidity are controlled into a painting booth, and a container of the air conditioner. The main body is equipped with a hot air generator that directly supplies hot air and a humidifier that directly sprays steam, so that the air introduced into the container body is heated by the hot air and humidified by the steam. be.

[Action of the invention]

In such an air conditioner, the air taken into the container body is directly heated by the hot air when it passes through a hot air generator that directly supplies hot air, and when it passes through a humidifier that directly sprays steam, the air is heated by the hot air. It is sprayed and humidified. The conditioned air, which has been adjusted to a predetermined temperature and humidity, is then supplied to the painting booth.

〔Effect of the invention〕

As mentioned above, as a heating means on the air intake side,
Since we have installed a hot air generator that directly supplies hot air, by adjusting the temperature of the hot air blown out from the hot air generator in response to fluctuations in the air heating load, we can uniformly heat the air that passes through the container body of the air conditioner. It becomes possible. As a result, when humidifying heated air with a humidifier that directly sprays g-air, it will not become partially oversaturated and will prevent the formation of water droplets in the conditioned air supplied into the paint booth. This prevents the occurrence of paint defects such as brush marks and blisters.

〔Example〕

Hereinafter, one embodiment of the present invention will be described in detail based on the drawings.

FIG. 1 is a schematic sectional view of an air conditioner according to the present invention, and FIG.
The figure shows an psychrometric diagram of the air conditioner according to the present invention.

(Configuration of the embodiment) In Fig. 1, ■ is an air conditioner, and this air conditioner 1 is connected to an air supply duct 2 of a painting booth (not shown) to one side, and an intake duct 1'' 1a to the other side. A container body 3 is formed with a gear ring 4 provided at the intake D I a of the container body 3, a roll filter 5 that removes dust in the air taken into the container body 3, and a roll filter 5. The hot air generator 6 directly supplies hot air to warm the clean air that has passed through the air, and the humidifier 7 humidifies the heated air by directly spraying steam onto the heated air. , temperature control by hot air generator 6 and humidifier 7,
Conditioned air with controlled humidity is supplied into the painting booth by an air supply fan 8 provided in an air supply duct 2.

The roll filter 5 described above is made of a non-woven fabric, a gi filter, a cloth filter, etc. with a thickness of about 2,011 mm, and is stretched from the top to the bottom inside the container body 1, and is extended from one end to the other as necessary. It is designed to be rolled up at the end of the

The hot air generator 6 includes a hot air blowing section 9 provided inside the container body 3 and a hot air generating section 10 provided outside the container body 3. In the hot air blowing section 9, a plurality of ducts 9a are arranged at intervals in the vertical direction, and each of the ducts 9a is provided with a blowing nozzle 9b.
Hot air is blown out on opposite sides.

In addition, the hot air generating section IO has a circulation duct 10a disposed in the upper part of the container body 3, and one end of the circulation duct 10a is connected to a roll filter 5.
The duct 9 of the hot air blowing section 9 is opened at the rear of the
There is an opening in a. A bulge Job is formed in the center of the circulation duct 10a, a combustion burner 10c is disposed inside the bulge Job, and a circulation fan IOd is provided downstream of the bulge Job. Moreover, the supply pipes 10e are connected to the combustion burner 10'c, and the other end is connected to the fuel supply device II. A valve 10 (is provided in the middle of the supply pipe 10e,
It comes to adjust the amount of fuel supplied to the combustion burners l, oc.

Further, the humidifier 7 has a plurality of supply pipes 7a arranged at intervals in the vertical direction, and the supply pipes 7a are provided with an initial number of nostles 7b. Furthermore, one end of the air supply pipe 7C is connected to the negative end of the supply pipe 7a, and the other end is connected to the steam supply device 12. And air supply pipe 7
A valve 7d is installed in the middle of C, and the supply pipe 7
The amount of steam supplied to a is adjusted.

Further, a temperature detector 13 and a humidity detector 14 are provided downstream of the air supply fan 8 provided in the air supply duct 2, and the temperature detector 13 is connected to the valve 10f of the hot air generator 6 by a conductor 15a. The humidity detector 14 is connected to the valve 7a of the humidifier 7. The temperature of the conditioned air supplied to the painting booth is detected by a temperature detector 13, and when the temperature exceeds a predetermined temperature range, a valve 10f is opened and closed, and fuel is supplied to a combustion burner 10c from a fuel supply device 11. is supplied, and the temperature of the air taken into the container body 3 is adjusted to a predetermined temperature. Further, the humidity is detected by a humidity detector 14, and when the humidity is out of a predetermined humidity range, a valve 7d is opened and closed, and steam is supplied from the steam supply device 12 to the supply pipe 7a and the heated air is heated. Humidity is adjusted to a predetermined humidity.

(Operation of the embodiment) The operation of the air conditioner 1 configured as described above will be explained with reference to FIG. 2.

In Fig. 2, the degree of odor supplied into the container body 3 of the air conditioner l is also expressed as the absolute humidity ['(+
The purpose is to set the temperature of the conditioned air finally supplied to the painting booth to be t, and to adjust the absolute humidity to Hz.

Simultaneously with the start of operation of the coating booth, the air conditioner 1 is activated, the air supply fan 8 rotates, and air is taken into the container body 3 through the intake port la. On the other hand, the snow kite launcher 6 and the humidifier 7 are operating, and the fuel supply device 11
The combustion gas is supplied from the combustion burner lOc to the combustion burner lOc, and the combustion gas is supplied into the container body 3 from the blow-off nozzle 9d through the circulation duct 10a and the duct 9a by the circulation fan 10d.

Further, steam is supplied from the steam supply device 12 to the supply pipe 7a, and the steam is sprayed into the container body 3 from the nozzle 7b.

Then, the air taken into the container body 3 passes through the hot air generator 6 for 1 Jrl. At this time, the combustion valve lof is controlled by the temperature sensor 13 so that the atmospheric temperature inside the container body 3 is at 12, and the combustion gas and air introduced into the container body 3 are mixed. When the mixed air passes through the hot air generator 6, its temperature becomes t2, the absolute temperature becomes Hl, and the air is supplied to the power generator 7.

Note that this mixing ratio is such that the ratio of air is much larger than that of combustion gas.

Further, when the mixed air passes through the humidifier 7, steam is sprayed, and the temperature of the mixed air becomes t3, and the absolute temperature becomes FI2.

In winter, conditioned air with a temperature of 18° C. and a relative humidity of 80% is supplied to the painting booth.

As explained above, as a heating means on the air intake side, the hot air generator 6 that directly supplies hot air is used instead of the conventional heater that supplies heat to the atmosphere by flowing steam through a heat transfer tube. The air conditioner 1
This makes it possible to uniformly heat the air passing through the container body 3.

As a result, when humidifying with the humidifier 7 that directly sprays steam into the mixed gas adjusted to 414 degrees, it is possible to humidify without partially oversaturating the gas, so that the steam is not supplied into the painting tooth. This has the effect of preventing the generation of water droplets in the conditioned air, and preventing the occurrence of coating defects such as repelling and blistering of objects being coated in the coating booth.

[Brief explanation of drawings]

FIG. 1 is a schematic cross-sectional view of an air 81 weathering device according to the present invention. 2nd 1 is an psychrometric diagram of the air conditioner according to the present invention. FIG. 3 is a schematic cross-sectional view of a conventional air conditioner. 1-.-Air conditioner 3-Container body 5-Roll filter 6--Hot air generator 7--Humidifier 9-Hot air blowing section 10--Hot air generating section 11--・Fuel supply device 12-----1 Steam supply device 13---1-Temperature detector 14--Humidity detector Applicant: Yota Automobile Forestry Co., Ltd. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] Air that supplies clean air with controlled temperature and humidity inside the painting booth! T! This is a J-sum device, in which a hot air generator that directly supplies hot air and a humidifier that directly sprays steam are installed in the container body of this air conditioner, and the air introduced into the container body is heated by hot air. An air conditioner characterized by heating and humidifying using steam.