JPH1099627A - Filter device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] A filter provided at the air suction port of an industrial medium temperature package or a packaged air conditioner indoor unit is often replaced one by one. Was. In addition, the work involved in climbing high places was dangerous. A filter (1) is supported by capstan rollers (3 'and 3') having opposing expansion and contraction functions. One end of the filter (1) is passed over a drum rotor (2), and when a differential pressure set by a differential pressure detector (9) is detected, a control unit (7) is activated. A driving command is transmitted to the motor 6 and the power is transmitted to the capstan rollers 4 and 4 ′ via the reduction gear 5, and the drum rotor 2 also starts to rotate, and while being pressed by the filter pressing spring, the air guide cover 10. , 11 are forwarded sequentially.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a filter device.

[0002]

2. Description of the Related Art In conventional package air conditioners, temperature control is mainly performed only by a person. However, in accordance with the needs of customers, in recent years, industrial medium temperature control has been performed on both surfaces of people and food. Packages are coming out.

However, it is not an exception that the model is installed in a room where the atmosphere such as dust and dirt is not good because the range of the installation place is expanded, and a long life filter is provided in front of the air suction port of the indoor unit. And high-performance filters. The above-mentioned filters are effective against air passing through one surface, and it is necessary to replace them when they become dirty, as with any filter. The short, dirty, high-ceiling replacement was cumbersome and dangerous. Therefore, there is an urgent need to develop a device for automatically replacing a filter with a new one when the filter becomes dirty. In addition, as a filter device for an air conditioner that removes artificial snow instead of dust and dust, Japanese Patent Laid-Open No.
Japanese Patent Publication No. 4-366328 is disclosed. When the above filter is used as it is for dust and dirt, if the material of the filter used is very high in hygroscopicity, dirt easily permeates into the filter and the dirty filter is used repeatedly. On the other hand, if the filter device has low hygroscopicity, no filter device has been found which has solved the problem that dust and dirt adhering to the filter are drawn to the heat exchanger and more than the remaining problems.

[0004]

What is important for the filter of the above-mentioned industrial medium temperature package is that it can be automatically replaced with a new filter when it becomes dirty.

[0005] For this purpose, a method in which a filter wound in a roll is pulled in one direction and a new filter is successively used like a camera automatic film loading apparatus is used efficiently. The apparatus comprises a capstan roller, a roll-wound filter, a motor, and a reduction gear.

In addition, a clogging detection device is mounted near the filter as described in claim 2 so as to interlock with the filter device so that the timing of filter replacement can be grasped.

[0007]

The key point of the present invention is:
It was in the nature of dust and dust. Since dust and dirt easily permeate when attached to the filter, it is not preferable to recycle a used filter and scrape and reuse the dust and dirt. Therefore, this time, the disposable method was selected. Use the filter until it gets dirty to a certain degree, and when it gets dirty get a new one, and when it gets dirty, get the next one. This requires movement like a camera's automatic film loading device. The configuration of the element is such that two sets of drive and driven capstan rollers are disposed at both ends of the front surface of the air suction port of the indoor unit, and one end of a roll-shaped filter provided on the driven side is applied to the drive side capstan roller. This is a method in which, when the transfer is completed and the timing for replacement is reached, the capstan roller on the driving side is turned to wind up the dirty filter. Also, in order to grasp the timing of replacement due to contamination of the filter, a filter clogging device formed by a pressure sensor or a light emitting sensor and a light receiving sensor is attached near the filter, and the filter is automatically replaced by connecting with the above filter device. Was made possible.

[0008]

Next, a filter device according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a filter device most applicable to products in the present invention. FIG. 2 is a schematic sectional view of the filter device to which the air guide cover is attached. FIG. 3 shows an alternative in which the clogging detection device in the filter device is composed of a light emitting element and a light receiving element. The filter device is installed in front of the air suction port of the indoor unit of the industrial medium temperature package in such a manner that the air guide body cover 11 covers the air suction port.
The present apparatus is configured such that, when one end of a filter 1 in which a nonwoven fabric mainly composed of pulp is rolled is passed over a drum rotor 2 and the differential pressure detector 9 detects clogging of the filter 1 with a set differential pressure, the control unit 7, a section from the capstan rollers 4, 4 ′ on the driving side to the capstan rollers 3, 3 ′ on the driven side is forwarded to the motor 6, and the motor 6 is transmitted via the reduction gear 5 to the capstan roller. The rollers 4 and 4 'are driven to wind up the filter 1. The filter 1 on the driven side is supported by rod-shaped capstan rollers 3, 3 'having a function of expanding and contracting by a spring. The drum rotor 2 on the driving side is also supported by rod-shaped capstan rollers 4 and 4 'having a function of expanding and contracting by a spring similarly to the driven side. The expansion and contraction function of the capstan roller is for easily mounting the filter 1 and removing the unnecessary filter wound around the drum rotor 2, and detaches the filter by expanding and contracting the rod in the spring installation direction. The filter presser spring 8 is a component having a function of winding around the filter 1 that is fed forward while guiding one end of the filter 1. The drum roller 2 is splined, and the capstan rollers 4 and 4 ′ are also formed in a gear shape in the same manner so that the power from the motor 6 can be efficiently transmitted by the function of the telescopic rod. The control unit 7 issues a command to sequentially feed the filter 1 by a predetermined amount, and is constituted by the same hardware as a fixed amount feeding mechanism of paper by a rotary encoder used in a printer. As a simple alternative to this unit, the time required for the filter 1 to move from the drive-side capstan roller to the driven-side capstan roller is measured, and a resistance value and a capacitor capacity corresponding to the time are given. Alternatively, it may be constituted by an electronic circuit called one shot. The air guide cover shown in FIG. 2 plays a role in appropriately guiding the air to be sucked into the air filter 1 and also preventing the filter 1 from being unnecessarily caught in the air suction port of the industrial medium temperature package indoor unit. Tension roller 12, 1
No. 3 was installed so that the filter 1 might be stretched well. In addition, the air guide main body cover 11 and the air guide front cover 10 can be divided into two around the hinge 14. This makes it easy to mount the filter 1 and the drum rotor 2
The used filter wound around can be removed. FIG. 3 shows a light-emitting element 15 and a light-receiving element 16 as an alternative to the filter clogging detection apparatus. This alternative was difficult because the sensor became difficult to react when the filter became thicker.

[0009]

As described above, the following effects are obtained by the filter device constituted by the filter progressive feeding mechanism of the first aspect and the clogging detecting device of the second aspect.

(A) In contrast to the conventional filter of one sheet,
Since the continuous end roll filter is used gradually, the filter replacement interval becomes longer.

The following effects are further obtained by the above effects.

1) The number of times of filter replacement work on a high ceiling is reduced, which is effective in preventing a fall accident.

2) Even a person with a fear of heights is very effective because the number of filter replacements is reduced.

(B) The degree of dirt is always managed by the sensor until one roll-shaped filter is used up.

(C) Like a conventional filter of one sheet,
Since no filter frame is required, it is economically effective.

[Brief description of the drawings]

FIG. 1 is a perspective view of a filter device according to the present invention.

FIG. 2 is a sectional view of a filter device with an air guide cover attached.

FIG. 3 is a perspective view in which a clogging detection device in the filter device includes a light emitting element and a light receiving element.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Filter, 2 ... Drum rotor, 3, 3 '... Capstan roller (driven side), 4, 4' ... Capstan roller (drive side), 5 ... Reduction gear, 6 ... Motor, 7 ... Control unit, 8 ... Filter holding spring, 9 ... Differential pressure detector.

Claims (1)

[Claims] 1. A filter in which two sets of capstan rollers are arranged in parallel with the suction port at the left, right, upper and lower ends of the front face of the suction port of the indoor unit, and the one set of capstan rollers is wound in a roll shape. A filter device, wherein the other set of capstan rollers is driven by a drive shaft including a motor and a reduction gear, and has a structure in which one end of the filter is wound.