JPS6350619B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an air conditioner used for maintaining the temperature and humidity in a room such as a painting booth at a predetermined value.

[Conventional technology]

In a paint booth, if the temperature or humidity inside the booth fluctuates, the drying rate of the paint may change and the paint finish may become uneven.

For this reason, conventionally, as shown in FIG. 1, an air conditioner 2 is connected to a coating booth 1 to keep the temperature and humidity within the coating booth 1 constant.

The air conditioner 2 purifies the outside air introduced into the interior using a saran net 3 and a roll filter 4.
After the purified air is humidified and warmed through an eliminator 5, a shower type humidifier 6, an eliminator 7, and an Erofin heater 8 to which steam is supplied, it is sent into the painting booth 1 by a blower 9. It is common for there to be.

[Problem that the invention seeks to solve]

However, when purified air is first humidified by the shower type humidifier 6 and then humidified by the Erofin heater 8, the humidification and heating of the purified air are performed separately. If the outside air introduced into the air conditioner 2 is dry air with a temperature below zero, the running time necessary to maintain the inside of the painting booth 1 at the optimum temperature of 20°C and humidity of 30%. There was a problem that the cost increased significantly.

In other words, the Erofin heater 8 has poor thermal efficiency, and furthermore requires separate equipment to generate steam as a heat source, and the cost of the steam is very high. Running costs for heating the purified air to a predetermined temperature increased significantly, and energy savings could not be achieved. Furthermore, since the inside of the Erofin heater 8 is easily clogged, frequent maintenance and inspections are required.

Therefore, the present invention applies a gas-liquid contact mechanism using a humidifying filler with high humidifying efficiency as a humidifying device,
Supplying heated water to the humidifying filling of the gas-liquid contact mechanism to simultaneously humidify and warm the purified air,
The purpose is to increase the thermal efficiency of the entire air conditioner and significantly reduce running costs by directly heating a portion of the purified air with combustion gas from a burner without humidifying it.

[Means for solving problems]

In order to achieve this object, the present invention uses a humidifying filler in the passage of purified air in an air conditioner configured to purify, humidify, and warm outside air introduced into the device. A gas-liquid contact mechanism is provided, and a heated water supply device is connected to the gas-liquid contact mechanism for circulating water heated by a submerged combustion burner provided in the recovery water tank to the humidifying filler. , a bypass passage is connected to the passageway for sucking and discharging a part of the purified air from the upstream side of the gas-liquid contact mechanism to the outside of the apparatus and reintroducing it into the apparatus at the downstream side of the gas-liquid contact mechanism; A direct combustion burner for heating purified air is provided in the bypass passage.

[Effect]

According to the present invention, purified air that is not only humidified but also heated through the humidifying filling of a gas-liquid contact mechanism to which water that has been heated with high thermal efficiency by a submerged combustion burner is circulated and supplied; Without passing through the gas-liquid contact mechanism, it is once sucked and discharged outside the air conditioner through a bypass passage from the front and back sides of the gas-liquid contact mechanism, and is directly heated in a dry state with high thermal efficiency by a direct combustion burner installed in the bypass passage. The purified air introduced into the air conditioner again is mixed at the downstream side of the gas-liquid contact mechanism and adjusted to a desired predetermined temperature and humidity. In other words, the purified air introduced into the air conditioner is heated with very high thermal efficiency by using two combustion burners, the submerged combustion burner and the direct combustion burner.

Therefore, the running cost of the air conditioner in winter is significantly reduced.

In addition, the purified air that bypasses the gas-liquid contact mechanism from the front side to the rear side passes through a bypass passage connected to the outside of the air conditioner and is heated by a direct combustion burner installed in the passage. This prevents the cross-sectional area of the air conditioner from becoming too large, and at the same time prevents the humidifying filler used in the gas-liquid contact mechanism from melting due to the high heat generated by the direct combustion burner. do not have.

〔Example〕

Embodiments of the present invention will be specifically described below based on the drawings.

FIG. 2 is a sectional view showing an example of an air conditioner according to the present invention. Note that parts common to those in FIG. 1 are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 2, the eliminator 5 and shower type humidifier 6 shown in FIG. 1 are not provided,
In place of these, a gas-liquid contact mechanism 10 using a humidifying filler is provided next to the roll filter 4, and a heating device 12 having a direct combustion type burner 11 is provided in place of the Erofin heater 8. There is.

The gas-liquid contact mechanism 10 is provided with a water tank 13 that supplies heated water dropwise from the top thereof.
The heated water supplied to the gas-liquid contact mechanism 10 flows down the gap between the humidifying fillers constituting the gas-liquid contact mechanism 10, is received in the pan 14, and is heated from the pan 14 through the water passage 15. Hot water supply device 16
is refluxed to.

The heated water supply device 16 includes a recovery tank 17 that collects and stores heated water, and a submerged combustion burner 18 provided in the recovery tank 17. and an exhaust path 20 with an exhaust fan 19 interposed therebetween.

In addition, a combustion blower 21 is connected to the submerged combustion burner 18, and the output of a temperature regulator 22 is supplied to the submerged combustion burner 18, so that the combustion amount adjusts the water temperature in the recovery water tank 17 to a required setting value (for example, 15 ° C. 20℃).

Then, water heated to a required setting value in the recovery water tank 17 is supplied to the water tank 14 through a water passage 24 in which a pump 23 is interposed, and is supplied from the water tank 14 to the gas-liquid contact mechanism 10 and then 15 and returns to the recovery water tank 17 again.

The heating device 12 also has a suction fan 26 connected to the air intake hole 25 formed in the upper wall surface of the air conditioner 2 between the roll filter 4 and the gas-liquid contact mechanism 10.
part of the purified air (e.g. 5 of the total air volume)
% to 15%), and directly heats this suction air with the combustion gas of the direct combustion burner 11 to introduce it into the downstream side of the gas-liquid contact mechanism 10.

That is, in the purified air passage through which the air introduced into the air conditioner 2 and purified by the saran net 3 and the roll filter 4 flows, a part of the purified air is not passed through the gas-liquid contact mechanism 10, but is placed on the previous stage thereof. A bypass passage 27 is connected thereto, through which purified air is once sucked and discharged outside the apparatus 2 and introduced into the apparatus 2 at a later stage, and a direct combustion type burner 11 for heating purified air is provided within the bypass passage 27.

Note that, on the downstream side of the gas-liquid contact mechanism 10, a square frame annular body 29 is provided in which a large number of ejection holes 28, 28, . . . for ejecting air introduced through the bypass passage 27 are bored.

The above is an example of the configuration of the device of the present invention, and the operation and effects thereof will be explained next.

For example, assuming that the outside temperature is 0°C,
While starting the blower 9, the heating device 12
, and the submerged combustion burner 18 of the heated water supply device 16 are ignited.

As a result, the 0°C outside air introduced into the air conditioner 2 by the suction force of the blower 9 is first purified through the saran net 3 and the roll filter 4, and then most of the purified air (85% to 95%) is fed to the gas-liquid contact mechanism 10, and heated water (15°C to
Humidity 90%~95%, subjected to gas-liquid contact (20℃)
It is humidified and heated to a temperature of 5°C. In addition, the heated water that has been brought into gas-liquid contact with purified air has a temperature of 8℃ to 10℃.
and is collected in the collection tank 17.

On the other hand, a part (5% to 15%) of the air purified through the saran net 3 and the roll filter 4 is passed through the air intake hole 25 formed on the front side of the gas-liquid contact mechanism 10 by the suction fan 26 of the heating device 12. It is sucked into the bypass passage 27 and heated to about 260° C. by the combustion gas of the direct combustion burner 11, and is ejected into the ejection holes 28, 28 of the square frame annular body 29 provided on the downstream side of the gas-liquid contact mechanism 10. It is ejected from.

As a result, water that has been heated with high thermal efficiency by the submerged combustion burner 18 passes through the gas-liquid contact mechanism 10 to which water is circulated and is humidified. High-temperature purified air that has passed through the bypass passage 27 without passing through the contact mechanism 10 and has been directly heated with thermal efficiency by the direct combustion burner 11 is mixed in a predetermined amount on the downstream side of the gas-liquid contact mechanism 10 to achieve the desired purpose. Conditioned air adjusted to a temperature of 20° C. and a humidity of 30% is obtained, and this air is supplied into the painting booth 1 by the blower 9 to maintain the inside of the booth 1 at the desired temperature and humidity.

In this case, the purified air drawn into the bypass passage 27 from the front side of the gas-liquid contact mechanism 10 is
It is not air humidified through the gas-liquid contact mechanism 10, but dry air that has simply been purified through the saran net 3 and roll filter 4, and
Since this dry air is directly heated by the direct combustion burner 11, thermal efficiency is very high.

Therefore, there are various problems that arise when using the Erofin heater 8 as in the past, namely, a separate equipment for generating steam is required, the cost of the steam is very high, the thermal efficiency is poor, and the inside is clogged. All the drawbacks of being easy to use are eliminated.

The temperature and humidity inside the coating booth 1 are measured by a temperature detector 30 and a humidity detector 31, respectively, and based on these detected values, the combustion amount of the submerged combustion burner 18, the discharge amount of the pump 23, and the direct combustion amount are determined. By appropriately controlling the combustion amount of the type burner 11, the air volume of the suction fan 26, etc., the temperature and humidity inside the painting booth 1 are always maintained at appropriate values.

Furthermore, when the painting booth 1 is not operating during breaks or other periods, the direct combustion burner 11 and the submerged combustion burner 18 are stopped from burning, and the output of the suction fan 26 and blower 9 is reduced by 50%. As a result, further energy savings can be achieved.

Furthermore, the purified air that does not pass through the gas-liquid contact mechanism 10 and detours from the front side to the rear side is transferred to the air conditioner 2.
Since the bypass passage 27 connected to the outside of the air conditioner 2 does not pass through the interior thereof, the cross-sectional area of the air conditioner 2 does not become large and the overall size of the air conditioner 2 does not become large. In addition, since the direct combustion type burner 11, which is smaller than the Erofin heater and outputs high energy, is provided not inside the air conditioner 2 but in the bypass passage 27 connected to the outside thereof, the direct combustion type There is no fear that the humidifying filler used in the gas-liquid contact mechanism 10 will melt under the influence of the high heat generated from the burner 11. That is, since it is common to use a hollow ball made of vinyl chloride resin with a large number of perforations as a humidifying filler, the atmosphere around the gas-liquid contact mechanism 10 is 65°C or higher.
When the temperature reaches 80°C, the humidifying filling becomes soft and deformed, and if the temperature rises further, there is a risk that the humidifying filling will completely melt. If the direct combustion type burner 11 is provided in the bypass passage 27, the humidifying filler is reliably prevented from deforming or melting due to the high heat of the direct combustion type burner 11.

It goes without saying that the air conditioner according to the present invention can also be used to adjust the temperature and humidity of rooms other than painting booths.

〔Effect of the invention〕

As described above, according to the present invention, a gas-liquid contact mechanism using a humidifying filler is applied as a humidifier, and a submerged combustion burner with high thermal efficiency is used for the humidifying filler with high gas-liquid contact efficiency. Warmed water is circulated and supplied from the provided heated water supply device, and the purified air passing through the gas-liquid contact mechanism is simultaneously humidified and heated.
Moreover, a part of the purified air is sucked into the bypass passage from the front stage side of the gas-liquid contact mechanism without passing through it, is heated with high thermal efficiency by a direct combustion burner, and is introduced into the rear stage side of the gas-liquid contact mechanism. It passes through a liquid contact mechanism and is mixed with humidified and warmed purified air. Therefore, there is an excellent effect that the thermal efficiency of the entire air conditioner can be significantly increased compared to conventional devices, and running costs can be significantly reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional air conditioner, and FIG. 2 is a sectional view showing an embodiment of the air conditioner according to the present invention. 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... Warming water supply device, 17...
...Recovery tank, 18...Submerged combustion burner, 26...
Suction fan, 27...bypass passage.

Claims (1)

[Claims] 1. In an air conditioner configured to purify, humidify and heat outside air introduced into the device, a gas-liquid contact mechanism using a humidifying filler is provided in the passage of the purified air in the device, and A heated water supply device is connected to the gas-liquid contact mechanism, and a heated water supply device that circulates water heated by a submerged combustion burner provided in the recovery water tank to the humidifying filler is connected to the passage. A bypass passage is connected to which the air is sucked out of the apparatus from the front side of the gas-liquid contact mechanism and then introduced into the apparatus again at the rear side of the gas-liquid contact mechanism. An air conditioner characterized by being equipped with a combustion burner.