JPS6146346Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air conditioner for maintaining the temperature and humidity in a painting booth or other room at a predetermined value.

For example, in a paint booth, it is known that when the temperature and/or humidity inside the booth changes, the drying rate of the paint changes, resulting in uneven paint finish. Therefore, in a painting booth without air conditioning equipment, the paint thinner formulation must be changed one by one depending on the temperature and humidity inside the booth, and this adjustment is extremely troublesome. A uniform coating finish is achieved by keeping temperature and humidity approximately constant. That is, as shown in FIG. 1, an air conditioner 2 connected to a paint booth 1 supplies air purified through a saran net 3 and a roll filter 4 to an eliminator 5, a shower-type humidifier 6, and an eliminator 7, and further converts it into steam. Erofin heater 8 supplied with
Usually, the air is supplied to the painting booth 1 by a blower 9 via the air blower 9.

According to this configuration, air is first humidified by the shower type humidifier 6, then heated by the Erofin heater 8, and then supplied to the painting booth 1. When the temperature is close to zero, the dew point temperature is reached near the wall surface on the rear stage of the Erofin heater 8, and dew condensation occurs.
This has the disadvantage that rust occurs within the device, significantly reducing its durability, and also adversely affecting temperature and humidity adjustment, making it impossible to perform accurate air conditioning control.

In view of the above, the present invention aims to improve the durability of the device by preventing the temperature drop on the downstream side of the heating device and preventing condensation, and to provide a new air conditioner that can perform accurate air conditioning control. The purpose is to provide.

In order to achieve the above object, the present invention provides an air conditioner that purifies outside air and then humidifies and heats it. The purified air is divided on the front side of the mechanism and the heated air is heated by a direct combustion burner, and the heated air is distributed along the wall surface arranged on the rear side of the humidifying gas-liquid contact mechanism and has a plurality of jet holes. It is characterized in that a part of the heated air supplied to the pipe and ejected from the ejection pipe is ejected toward or along the wall surface.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

FIG. 2 is a cross-sectional view showing one embodiment of the device of the present invention, and the parts corresponding to those in FIG. The eliminator 5 and the shower type humidifier 6 are omitted, and a roll filter 4 is used instead.
Gas-liquid contact mechanism 10 using a humidifying filler in the latter stage
A heating device 12 having a direct combustion type burner 11 is provided in place of the Erofin heater 8.

A required amount of heated water is dripped onto the gas-liquid contact mechanism 10 from a water tank 13 formed on the upper wall surface, and the water overflowing from the gas-liquid contact mechanism 10 is received by a pan 14 formed at the bottom. It is supplied to the heating device 16 through the water passage 15. The heating device 16 is composed of a recovery water tank 17 and a submerged combustion burner 18 disposed within the recovery water tank 17.
7 is connected to the water passage 15 and an exhaust passage 20 in which an exhaust fan 19 is inserted;
In addition, the submerged combustion burner 18 has a combustion blower 21.
is connected, and the output of the temperature regulator 22 is supplied, so that the amount of combustion is controlled so that the water temperature in the recovery water tank 17 reaches a required setting value, for example, 15 to 20°C. The heated water in the recovery water tank 17 is supplied to the water tank 13 through the water passage 24 by the pump 23, and while passing through the gas-liquid contact mechanism 10, it comes into contact with the outside air and the water temperature drops to 8 to 10°C. do.

In addition, the heating device 12 supplies a portion of the purified air (for example, about 5 to 15% of the total amount of air) from an intake hole 25 formed on the upper wall surface between the roll filter 4 and the gas-liquid contact mechanism 10 through a circulation fan 26. ) is aspirated,
This suction air is supplied to a circulation path 27 in which a direct combustion type burner 11 is arranged and heated, and this heated air is passed through a large number of blow-off holes 28 arranged at the downstream side of the gas-liquid contact mechanism 10. It has a configuration in which the gas is supplied to the rectangular frame annular pipe 29 and refluxed to the downstream side of the gas-liquid contact mechanism 10. Here, as shown in FIG. 3, the annular pipe 29 has pipes connected in a cross-shaped shape, and has a large number of ejection holes 28 formed on its back side, and a plurality of ejection holes 30 on each side facing the wall surface. formed,
It is configured so that heated air is blown out against the wall surface.

In addition, as shown in FIG. 3, when the lower end of the annular pipe 29 is close to or in contact with a wall surface, the jet hole facing the wall surface is omitted and the heated air flows along the wall surface from the jet hole 28 on the back of the lower end. You may use a substitute.

The above is an example of the configuration of the devised device, and next, its operation will be explained.

For example, assuming that the outside air temperature is 0° C., the blower 9 is started, the direct combustion burner 11 of the heating device 12 is ignited, and the submerged combustion burner 18 of the heating device 16 is ignited.

As a result, outside air is purified and introduced into the air conditioner 2 through the wire mesh 3 and the roll filter 4,
Most of this purified air is in the gas-liquid contact mechanism 10
and is brought into gas-liquid contact with the heated water heated by the submerged combustion burner 18 supplied to the humidifying filler 10, for example, at a humidity of 90 to 95% and a temperature of 5°C.
humidified and heated.

On the other hand, a part of the purified air is sent to the heating device 12, heated to about 260° C. by the direct combustion burner 11, and then ejected from the square frame annular pipe 29. Therefore, the gas-liquid contact mechanism 1 is located at the square frame annular pipe 29 position.
Air humidified and heated by 0 and heating device 12
is mixed with air heated by - Maintains humidity. In this case, the air introduced into the heating device 12 is not air humidified by the gas-liquid contact mechanism 10, but simply purified air, and is heated by the direct combustion burner 11.
There are various problems that arise when using the conventional Erofin heater for heating, namely, separate equipment for producing steam is required, the cost of the steam is very high, and in addition, the Erofin heater itself has poor thermal efficiency. All the drawbacks that the interior was easily clogged have been resolved,
It is possible to obtain an inexpensive air conditioner with very good thermal efficiency, and the injection hole 30 on the side of the annular pipe 29 can be used.
Heated air is blown out towards the wall,
It is possible to prevent the temperature from decreasing on the wall surface of the latter stage of the annular pipe 29, and to prevent the temperature from reaching the dew point temperature. In reality, the temperature and humidity inside the painting booth 1 are measured by the temperature detector 3.
1 and the humidity detector 32, and based on these detected values, the combustion amount of the submerged combustion burner 18, the discharge amount of the pump 23, the combustion amount of the direct combustion burner 11, the air volume of the circulation fan 26, etc. are controlled as appropriate. The temperature and humidity inside the coating booth 1 are always maintained at appropriate values.

In the present invention, a shower type humidifier 6 as shown in FIG. 1 may be used instead of the gas-liquid contact mechanism 10, and the heating device 16 is not limited to the submerged combustion burner 18. Any heating device can be applied, and the heating device itself can be omitted.

Furthermore, it goes without saying that the present invention is applicable not only to paint booths but also to other equipment requiring air conditioning equipment.

As described above, according to the present invention, a direct combustion burner is used as the heating device, and a part of the heated air heated by the direct combustion burner is ejected from the jet pipe toward or along the wall surface. Therefore, even when the outside temperature is low, the area near the wall surface does not reach the dew point temperature, preventing dew condensation, thereby preventing rust and increasing the durability of the equipment. This has the excellent effect of allowing accurate air conditioning control.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a conventional air conditioner, FIG. 2 is a sectional view showing an embodiment of the air conditioner according to the present invention, and FIG. 3 is a sectional view taken along the - line in FIG. Explanation of symbols, 1...Painting booth, 2...Air conditioner, 4...Roll filter, 9...Blower, 10
... Gas-liquid contact mechanism, 11 ... Direct combustion burner, 12
...Heating device, 16...Heating device, 28, 30...
...Blowout hole, 29...Annular pipe.

Claims (1)

[Scope of utility model registration request] In an air conditioner that humidifies and heats outside air after purifying it, a humidifying gas-liquid contact mechanism is disposed in the passage of the purified air, and the purified air is divided on the upstream side of the humidifying gas-liquid contact mechanism. Heated air heated by a direct combustion burner is supplied to an ejection pipe having a plurality of ejection holes along the wall surface disposed on the rear side of the humidifying gas-liquid contact mechanism, and is ejected from the ejection pipe. An air conditioner characterized in that a part of the heated air is blown out toward or along a wall surface.