JPH0340337Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a dehumidifier that can be used for dehumidifying and drying wood, food, and various other articles.

(Prior art) Fig. 6 and Fig. 7 are diagrams showing an example of a conventional method, in which 1 is a drying chamber, and 2 is a function of circulating the air in the drying chamber and applying wind to the surface of an object to be dried 4 such as wood. 3 is a humidity sensor that detects the relative humidity of the air in the drying room and controls the operation and stop of the dehumidifier via a humidity controller.

10 is a refrigerant compressor 11a, 11b, a condenser 12a, 12b for reheating the air, an evaporator 13a, 13b for cooling and dehumidifying the air, an air circulation blower 14a, 14b, and an evaporator 13a, 13b for condensation. This is a dehumidifier equipped with drainage ports 15a, 15b, etc. for collecting moisture in the air and discharging it to the outside.
It is separated from the system dehumidifier 10b by a partition plate 18. In addition, the compressor 1 of the first system dehumidifier 10a
1a and the blower 14a, and the compressor 11b and the blower 14b of the second system dehumidifier 10b are operated and stopped in synchronization, respectively.

Further, 16 is a suction duct for sucking air into the drying chamber 1 into the dehumidifier 10, and 17 is a suction duct for the dehumidifier 10.
This is a blow-off duct for blowing air from the drying chamber 1 to the drying chamber 1.

In the above dehumidifier, when the air in the drying chamber 1 is circulated, when this air passes between the objects 4 to be dried, it promotes evaporation of moisture from the surface of the objects 4, and the moisture content of the objects 4 to be dried gradually decreases. I will do it. On the other hand, as the moisture in the air increases (humidity increases), the latent heat of evaporation is taken away and the temperature decreases.

Therefore, in order to remove the moisture in the air, a part of the circulating air in the drying chamber 1 is guided to the dehumidifier 10 by the blowers 14a and 14b, and the air is guided to the evaporator 1 in the dehumidifier 10.
The air is cooled and dehumidified through the condensers 12a and 13b, then reheated through the condensers 12a and 12b to raise the temperature, and then blown into the drying chamber 1 again. Evaporator 1
The water condensed in 3a and 13b is drained from drain ports 15a and 1.
5b to the outside, and the moisture content of the material to be dried 4 decreases by the amount of condensed moisture.

Depending on the type of material to be dried 4, for example, in the case of wood, drying may proceed if the dehumidifier 10 is operated continuously to gradually lower the moisture content, but the wood may become distorted, cracked, etc., and its commercial value may decrease. It will disappear. To prevent this, the dehumidifier 10 is controlled according to an appropriate drying schedule (reducing the moisture content).

As for this control method, the cheapest and most popular method is to detect the relative humidity value of the air unit in the drying room 1 with a humidity sensor 3, and then use a humidity controller with two relative humidity settings to control the first system dehumidifier. In this method, the dehumidifier 10a and the second system dehumidifier 10b are operated and stopped at appropriate relative humidity values to control the dehumidifying capacity.

(Problems to be Solved by the Invention) In the conventional device described above, the drying chamber 1 and the dehumidifier 10 are communicated through one suction duct 16 and one blowout duct 17, and the first system dehumidifier 10a
The ventilation path of the second system dehumidifier 10b is the suction duct 1.
6 and a blowout duct 17, respectively. First system dehumidifier 10a and second system dehumidifier 10
b is operated and stopped by a humidity controller, but depending on the dehumidifying load condition, only one of them may be stopped. In this case, not only the compressor but also the blower are stopped at the same time. Figure 6 and 7
The first system dehumidifier 10 is operating as shown in the figure.
The air blown out from a is connected to the second system dehumidifier 1 at a point.
0b and the ventilation resistance between the items to be dried 4 in the drying chamber, one branch passes through the blowout duct 17 as indicated by the broken line arrow, and is connected to the second system dehumidifier 1.
The air flows backward through the air 0b and bypasses the air, mixes with the air that has circulated between the objects to be dried 4 in the suction duct 16, and is sucked into the first system dehumidifier 10a.

When some dehumidifier systems are stopped due to dehumidification load conditions, the air blown out from the operating dehumidifier system flows back through the stopped dehumidifier system and bypasses the dehumidifier system. When the amount of circulating air to the product is reduced, drying time becomes longer, and the operation is stopped, the blower is stopped at the same time as the compressor to prevent re-evaporation of water condensed on the surface of the evaporator fins. However, there have been problems in that the air blown from the dehumidifier system during operation bypasses the dehumidifier system in a reverse flow, which reduces its effectiveness and reduces the dehumidification efficiency.

(Means for solving the problem) The present invention uses multiple systems of dehumidifiers consisting of a refrigerant circuit consisting of a compressor, a condenser, an evaporator, etc., and a blower that is operated and stopped in synchronization with the refrigerant circuit. In a dehumidifier in which multiple systems of dehumidifiers are installed in parallel and connected to a drying room via an air suction duct and an air blowing duct, each of the air outlet ports of the multiple systems of dehumidifiers is The above problem has been solved by providing a backflow prevention shutter that opens and closes in synchronization with the operation and stop of the dehumidifier's blower.

(Function) Since it has the backflow prevention shutter as described above, the air outlet from the dehumidifier system that has been stopped is closed by the shutter at the same time as the dehumidifier system is stopped.
Therefore, the blown air does not bypass into the dehumidifier system that is stopped, and all of the blown air can be blown out to the drying room.

(Example) Figures 1 to 3 show an example of the present invention, and 1 to 18 in the figures are the same as those shown in Figures 6 and 7. Backflow prevention shutters 20a, 20b are provided at the air outlets of the first and second system dehumidifiers 10a, 10b.
The backflow prevention shutters 20a and 20b are wind pressure type shutters in which a plurality of blades 21 are rotatably supported on a frame 23 via a support shaft 22, as shown in FIGS. 3a and 3b. When the machine is operated, the wind pressure causes the blades 21 to open as shown, and when the machine stops, the blades 21 close as shown.

Note that these shutters 20a and 20b are
As shown in Figures a and b, each blade 21 is connected to the connecting rod 2.
4, and the blower 14a, 1 is connected by the motor 25.
It may be configured to open and close in synchronization with the operation and stop of 4b.

Moreover, the dehumidifier 10 can also be installed in the upper part of the drying chamber 1 as shown in FIG.

In the above example, if some of the dehumidifier systems are stopped due to dehumidification load conditions, the backflow prevention shutter provided at the outlet of the dehumidifier system that has stopped will also be shut down in synchrony with this. be done. Therefore, the air blown from the dehumidifier system in operation does not flow backwards and bypass the dehumidifier system when it is stopped, and all the air blown out can be circulated between the items to be dried in the drying chamber. Become.

(Effects) As is clear from the above, according to the present invention, there is no backflow bypass of the blown air to the dehumidifier system when it is stopped, and all the blown air can be circulated to the drying room, so moisture from the material to be dried can be removed. The amount of evaporation increases, the drying time can be shortened, and the water condensed on the surface of the evaporator fins in the stopped system can be prevented from re-evaporating, thereby improving the dehumidification efficiency.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1, and Fig. 3 a and b are a front view a and a side view showing the structure of the backflow prevention shutter. b, Fig. 4 is a front view a and side view b showing the configuration of another embodiment of the backflow prevention shutter, Fig. 5 is a vertical sectional view showing another embodiment, and Fig. 6 is an example of a conventional one. The vertical sectional view, FIG. 7, is a BB sectional view of FIG. 6. 1... Drying room, 10... Dehumidifier, 10a... First system dehumidifier, 10b... Second system dehumidifier, 11
a, 11b... Compressor, 12a, 12b... Condenser, 13a, 13b... Evaporator, 14a, 14b
...Blower, 16...Suction duct, 17...Blowout duct, 18...Partition plate, 20a, 20b...Backflow prevention shutter.

Claims (1)

[Scope of utility model registration request] Equipped with multiple dehumidifier systems consisting of a refrigerant circuit consisting of a compressor, condenser, evaporator, etc., and a blower that operates and stops in synchronization with the refrigerant circuit, and the dehumidifiers of the same multiple systems are installed in parallel with each other. In a dehumidifier connected to a drying room through an air intake duct and an air outlet duct, the air outlets of the plurality of dehumidifier systems are opened and closed in synchronization with the operation and stop of the blower of each dehumidifier. A dehumidifier characterized by being equipped with a backflow prevention shutter.