JPH0569568B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to devices used, for example, when dehumidified heated air is circulated and sent into a dryer when drying synthetic resin materials. A dehumidifying circulation line that passes air through at least one of a plurality of dehumidifying cylinders filled with moisture to remove moisture, heats the air, and circulates the heated air through the material to be dried; The present invention relates to a dehumidifying device that includes at least a regeneration line that regenerates adsorbent by sending hot air thereto, and that each of these lines is sequentially switched by a valve device.

Conventionally, as this type of dehumidification device, the one described in Patent Application Publication No. 11368 of 1982 is known.

This device has a plurality of dehumidifying tubes arranged on the same circumference around the rotation axis, a sliding valve control device is provided at both the upper and lower ends of each dehumidifying tube, and a fixed lid is placed on the outside of the valve control device. However, each dehumidifying cylinder is rotated integrally with the perforated plate in the slide valve control device by rotation of the rotating shaft, and the dehumidifying circulation line and the regeneration circulation line are sequentially switched.

However, according to this method, (1) each dehumidifying tube must be rotated integrally with the perforated plate to perform switching, which has the disadvantage of increasing power consumption;
There is a disadvantage that the valve control device is large and complicated. In addition, (2) outside air is pumped in midway through the regeneration circulation line, so if the outside air is humid with a high moisture content, especially in the summer,
There are some disadvantages in regenerating the adsorbent.

In this invention, both upper and lower ends of a plurality of dehumidifying cylinders are connected and fixed to a fixed valve box via connecting pipes, and the fixed valve box has a ventilation passage and a cooling communication passage adapted to communicate with the opening of the connecting pipe. A valve body is rotatably fitted, and the valve body is covered with a fixed valve box and a fixed valve cover, and the valve cover is in communication with the ventilation passage of the valve body. A dehumidifying conduit, a cooling conduit that serves as a cooling communication path, and a regeneration conduit that communicates with the regeneration communication path are respectively formed, and the dehumidification conduit, the ventilation path, and the dehumidifying tube are passed through. After heating the air with a heater and passing it through a drying section,
A dehumidification circulation line is formed in which the air is returned through a cooling device attached to the dehumidification circulation conduit, and the air passed through the cooling conduit, the cooling communication path, and the dehumidification cylinder is not passed through the drying section. A cooling circulation line is formed through a cooling conduit whose one end is connected to the latter half of the dehumidification circulation conduit located in front of the cooling device, and a cooling circulation line is formed between the valve body and the valve cover by attaching and detaching the cooling circulation line. The above-mentioned inconvenience is attempted to be solved by a configuration in which a partition plate is provided that allows selection of the dehumidification circulation line and the dehumidification circulation line.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 11.

Reference numerals 1, 2, 3, and 4 are dehumidifying cylinders provided at equal positions on the same circumference, and an adsorbent 5 such as a molecular sieve is provided in each dehumidifying cylinder 1 to 4. At both upper and lower ends of each of these dehumidifying tubes 1 to 4, there are
As shown in the figure, a fixed valve box 8 and a valve body 9 are connected via a connecting pipe 6.
A pair of upper and lower valve devices 7, 7a comprising a valve cover 10 and a valve cover 10.
is installed.

That is, as shown in FIGS. 2 to 4, the fixed valve box 8 has a roughly shaped cross section, and one end of the connecting pipe 6 is connected and fixed at evenly spaced positions on the outer peripheral side wall. A valve body 9 is rotatably fitted in the storage portion.

As shown in FIGS. 2 to 4 and 6, the valve body 9 is connected to a ventilation passage 11 for cooling, which corresponds to the opening 6a of each of the connecting pipes 6 and the connecting hole 8a of the fixed valve box 8. It has a communication passage 12 and a regeneration communication passage 13, and the regeneration communication passage 13 is divided into an elbow shape by a partition wall 14 from the center of rotation to the connection hole 8a of the fixed valve box 8. There is. The valve body 9 is airtightly covered with a valve cover 10 which is superimposed on and fixed to the outer surface of the fixed valve box 8. Inner cylinder part 14a
In addition, an inner cylindrical portion 10a hanging down at the center of the lower part of the valve lid 10 is fitted inside to maintain airtightness.

As shown in FIGS. 2 to 4 and 7, the valve lid 10 includes a dehumidification passage 15 communicating with the ventilation passage 11 of the valve body 9, and a cooling passage 16 communicating with the cooling passage 12. A regeneration conduction path 17 communicating with the regeneration communication path 13 is formed.

At the center of both the upper and lower valve devices 7, 7a, there is a valve body 9.
A rotary shaft 18 for rotating the rotary shaft 18 is fitted in the vertical direction, and a motor 19 is provided at the upper end of the rotary shaft 18, and a positioning member 20 such as a magnet 20a and a reed switch 20b or a cam and a limit switch is installed at the lower end. On the other hand, a valve body 9 is fixed to this rotating shaft 18 with a key 21. Therefore,
When the rotary shaft 18 is rotated via the motor 19, the valve body 9 is intermittently moved between the fixed valve box and the valve cover 10 due to the operation of a timer attached to the motor 19, for example.
The positioning member 20 is rotated by 90° in a certain direction.
The ventilation passage 11, cooling conduit 12, and regeneration communication passage 1 of the valve body 9 are controlled by
3 sequentially switches the corresponding positions of the fixed-side valve cover 10 and the fixed valve box 8 with the respective conductive parts.

As shown in Figure 8, a dehumidification circulation conduit 22 is disposed between the dehumidification conduit passages 15, 15 of the two upper and lower valve covers 10, 10 to form a dehumidification circulation line.
A lower valve device 7a, a drying heater 23, a drying section 24 which is a dryer attached to the synthetic resin forming machine, a cooling device 25, a blower 26, and an upper valve device 7 are installed in this dehumidification circulation line in this order. Therefore, the dehumidification conduction path 15 and the ventilation path 11
The dehumidified air is passed through the dehumidifying tubes (1 and 2 in FIG.
After passing through the dehumidification circulation conduit 22, it is returned to the blower 26 through the cooling device 25 attached to the latter half of the dehumidification circulation conduit 22.
It will be used again in circulation.

In addition, the cooling conduction path 16 of both valve lids 10, 10,
16, when the blower 26 is the starting point, one end is connected to the latter half of the dehumidification circulation conduit 22 located in front of the cooling device 25, and the other end is connected to the dehumidification from the blower 26 to the upper valve cover 10. A cooling conduit 2 is branched from an appropriate position of the circulation conduit 22 and communicated with a desired dehumidifying cylinder (3 in FIG. 8).
By adhering a partition plate 33 (to be described later) between the valve body 9 and the valve cover 10, the cooling passage 16, the cooling communication passage 12, and the dehumidifying tube (dehumidifying tube) are connected. In Fig. 8, the air passed through 3) is not passed through the drying section 24, but instead flows through the cooling conduit 2.
7 and is cooled by a cooling device 25 and a blower 26
It is returned to the factory and used again in the same circulation line.

Furthermore, as shown in Figures 2, 4, and 8,
The regeneration conduit 17 of the upper valve device 7, that is, the upper valve cover 10, is connected to an upper regeneration conduit 28 that takes in outside air from one end, and this regeneration conduit 2
A filter 29 is attached to the outside air intake part of the regeneration conduit 28 of No. 8, and a regeneration blower 30 and a regeneration heater 3 are installed before reaching the upper valve cover 10.
1, the regeneration conduit 17 of the lower valve cover 10 is connected to the lower regeneration conduit 32,
The tip of the conduit 32 is a discharge port 32a. The area from the filter 29 to the discharge port 32a is a regeneration line, and the outside air taken in from the filter 29 is heated by a regeneration heater 31, and the hot air is used to blow the dehumidifying tube (4 in FIG. 8) above the regeneration line. The adsorbent inside is dried and regenerated, and the hot air after use is discharged to the outside of the system from an outlet 32a.

As shown in FIGS. 2 and 5, between the inner cylinder part 14a of the valve body 9 and the middle cylinder part 10b of the valve lid 10, there is a substantially horse-shaped bottom plate part 34, and the bottom plate A partition plate 33 is removably attached to the outer circumferential edge of the section 34 and includes an outer peripheral wall section 35 and a cooling hole section 36 that communicates with the cooling communication passage 12 of the valve body 9. 3
Reference numeral 7 denotes a mounting hole for a fastening member such as a screw or bolt, through which the partition plate 33 is removably mounted on the outer surface of the valve body 9.

That is, when the partition plate 33 is attached to the upper and lower two valve devices 7 and 7a as shown in FIGS. 2 and 3,
As shown in FIG. 8, two dehumidifying cylinders are used as a dehumidifying circulation line to dehumidify, one dehumidifying cylinder is regenerated as a regeneration line, and the remaining one is cooled as a cooling circulation line. This processing operation can be carried out by rotating the valve bodies 9, 9, 9 to 1.
1 is similar as shown in FIG. The reason for this is that, for example, the air sent from the cooling passage 16 of the upper valve lid 10 is transferred between the middle cylinder portion 10b of the valve lid 10 and the partition plate 33.
After passing through an airtight space with the cooling hole 36, the valve body 9 is
This is because it has no choice but to pass through the cooling communication passage 12, and the same reason applies to the lower valve device 7a.

Conversely, the partition plate 3
When 3 and 33 are removed, the cooling circulation line is removed and the three dehumidifying tubes (for example, 1, 2, and 3) are merged into the dehumidifying circulation line, and the regeneration line is connected to the other two lines. Since it is separated from the conduit section, one dehumidifying tube (for example, 4) is always used as a regeneration liner.

Furthermore, if the upper valve device 7 is equipped with the partition plate 33 and the lower valve device 7a is not equipped with the partition plate 33, two dehumidifying cylinders are dehumidified, one dehumidifying cylinder is regenerated, and the remaining one is Although the dehumidifying cylinder is cooled in the same way as in the first example, it cannot be used as a cooling circulation line, so it can be connected to the dehumidifying circulation conduit 22 via a branch pipe and used as a dehumidifying circulation line. In addition, if you do not want to use the cooling circulation line, you can make various design changes such as covering the conduit of the line with a blind cover.

In this manner, the cooling circulation line or the dehumidifying circulation line can be selected by attaching or detaching the partition plate 33.

FIGS. 12 and 13 show a modification in which a heat exchanger is attached to the middle of the dehumidification circulation conduit 22. FIG.

In FIG. 12, a heat exchanger 38 is attached in front of the drying heater 23 provided at a suitable position in the dehumidifying circulation conduit 22, and the hot air passing through the drying section 24 is transferred to the drying heater 23.
The low-temperature hot air is taken in immediately before the connection part 27a. With this configuration, it is possible to preheat the drying heater 23 and to precool the cooling device 25 to cool the area after the connecting portion 27a, thereby achieving reuse of thermal energy.

Figure 13 shows the lower regeneration conduit 32 of the regeneration line.
The heat discharged to the outside of the system is taken into the dehumidifying circulation conduit 22 via the heat exchanger 39 and discharged to the outside of the system. This has the advantage that exhaust heat from the regeneration liner can be recovered.

The operation of this embodiment will be explained below.

The air sent from the blower 26 is branched into three directions by the upper valve device 7 and passed through the dehumidifying cylinders 1, 2, and 3, and the air dehumidified in the dehumidifying cylinders 1, 2 is dried via the dehumidifying circulation conduit 22. A dehumidifying circulation line is formed in which the material to be dried is dried by a heater 23, passed through a drying section 24, dried, and then cooled by a cooling device 25 and returned to a blower 26 again.

On the other hand, the air that has passed through the dehumidifying tube 3 passes through the lower valve device 7a and the cooling conduit 27, and is then mixed with the hot air coming out of the drying section 24 at the connecting section 27a, and is mixed with the cooling device 2.
5 and returns to the blower 26 again.

The remaining dehumidifying tube 4 is a regeneration heater 31 of a regeneration liner, which heats the adsorbent 5 that has sufficiently absorbed moisture in the previous process so that it can be recycled.

When a predetermined period of time has elapsed, the motor 19 is activated by the operation of, for example, a timer attached to the motor 19 and the rotating shaft 18 is rotated by 90 degrees, and the valve bodies 9, 9 of the upper and lower valve devices 7, 7a are simultaneously rotated by 90 degrees. Therefore, the dehumidification circulation line I, the regeneration line I, and the cooling circulation line I are sequentially switched.

Such operations are repeated intermittently. (See Figures 2, 3, and 8 to 11).

In addition, although the number of dehumidifying cylinders is four in the embodiment, the present invention is not limited thereto and may be any number of dehumidifying cylinders. The number of dehumidifying tubes used during operation of the dehumidifying circulation line can also be determined.

Furthermore, the drying section 24 is not limited to a dryer that dries synthetic resin materials, but may also be a dryer that dries or controls the humidity of, for example, medical materials, foods, and other indoor spaces.

Furthermore, the object to be dehumidified is not limited to air, but may be other gases.

According to the present invention having the above configuration, the dehumidification circulation line, the regeneration line, and the cooling circulation line can be switched by simply rotating the valve body, without rotating each dehumidification cylinder via a valve device as in the conventional case. Therefore, power consumption is low, and together with the miniaturization of the valve device, the sealing surface is smaller, which improves airtightness, which has the effect of preventing gases with different temperatures and humidity from mixing in each line. There is.

In addition, there is a partition plate between the valve body and the valve cover that allows you to select between the cooling circulation line and the dehumidification circulation line by attaching and detaching it, so you can quickly adapt to the drying conditions of the material to be dried and the moisture content of the air. It has the advantage of being able to be selected as appropriate.

In addition to the configuration of this partition plate, the air passed through the cooling conduit, the cooling communication path, and the dehumidifying tube is not passed through the drying section, but is connected at one end to the rear half of the dehumidifying circulation conduit located in front of the cooling device. A cooling circulation line is formed which is circulated through a cooling conduit, and the hot air from the dehumidifying circulation line is circulated and used as it is, instead of using outside air as in the conventional case. Therefore, according to the conventional cooling method by introducing outside air, although the adsorbent that has sufficiently adsorbed moisture in the gas in the dehumidifying circulation line is regenerated in the regeneration line, the outside air containing moisture is Since the adsorbent is cooled by water, the moisture content reduces the regeneration efficiency of the adsorbent. This drawback is especially noticeable in summer when the moisture content is sometimes high (when the plum blossoms enter).

On the other hand, in the cooling circulation line of the present invention,
As mentioned above, since the hot air with a low water content used in dehumidification circulation A is cooled and passed through the regenerated adsorbent, moisture does not adhere to the regenerated adsorbent due to the cooling. Experimental results showed that the regeneration ability of the adsorbent was greatly improved.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of the dehumidifying device, FIG. 2 is a partial vertical sectional right side view of FIG. 1, and FIG. 3 is a partial vertical sectional view of FIG. 4
The figure is a cross-sectional view taken along the lines shown in Fig. 2, Fig. 5 is a plan view of the partition plate, Fig. 6 is a plan view of the valve body, Fig. 7 is a partially cutaway cross-sectional view of the valve cover, and Fig. 8 is a plan view of the partition plate. FIGS. 9 to 11 are partial configuration diagrams showing states in which the valve device is switched, and FIGS. 12 and 13 are schematic configuration diagrams of modified examples. A...Dehumidification circulation line, B...Cooling circulation line, C...Regeneration line, 1, 2, 3, 4...Dehumidification tube, 5...Adsorbent, 6...Connection pipe, 7...Upper valve device , 7a...lower valve device, 8...fixed valve box, 9
... Valve body, 10 ... Valve lid, 11 ... Ventilation passage, 12
... Cooling communication path, 13 ... Regeneration communication path, 14
... Partition wall, 15 ... Dehumidification conduction path, 16 ... Cooling conduction path, 17 ... Regeneration conduction path, 18 ... Rotating shaft, 19 ... Motor, 20 ... Positioning member,
22...Dehumidifying circulation conduit, 23...Drying heater, 24...Drying section, 25...Cooling device, 26...
... Blower, 27 ... Cooling conduit, 30 ... Regeneration blower, 31 ... Regeneration heater, 33 ... Partition plate, 35 ... Outer peripheral wall, 38, 39 ... Heat exchanger.

Claims (1)

[Claims] 1 Both upper and lower ends of a plurality of dehumidifying cylinders are fixed and communicated with a fixed valve box via connecting pipes, and the fixed valve box has a ventilation passage, a cooling communication passage, and a regeneration passage that are connected to the opening of the connecting pipe. A valve body having a communication passage is rotatably fitted, and the valve body is covered with a fixed valve box and a fixed valve cover, while the valve cover has a dehumidification conduit communicating with the ventilation passage of the valve body. A passageway, a cooling conduction passage communicating with the cooling communication passage, and a regeneration conduction passage communicating with the regeneration communication passage are respectively formed, and dehumidification is carried out through the dehumidification conduction passage, the ventilation passage, and the dehumidification cylinder. The dehumidified air is heated by a drying heater, passed through a drying section, and then returned through a cooling device attached to a dehumidification circulation conduit to form a dehumidification circulation line, and a cooling conduit and a cooling communication path. A cooling circulation line is formed in which the air passed through the dehumidifying tube is not passed through the drying section, but is circulated through a cooling conduit whose one end is connected to the rear half of the dehumidification circulation conduit located in front of the cooling device, Furthermore, the dehumidification device is characterized in that a partition plate is provided between the valve body and the valve cover so that a cooling circulation line and a dehumidification circulation line can be selected by attaching and detaching the partition plate.