JPS62196532A - Filter for air conditioner - Google Patents

Abstract

PURPOSE:To protect a low-cost heat exchanger against dust or powder for which washing or replacement is not needed or frequency of washing or replacement is quite low by a method wherein a continuous belt-like filter is arranged to enclose the heat exchanger and means for rotating the filter in the enclosing direction is provided. CONSTITUTION:Since air stream flows through a filter 4 before it passes through a heat exchanger 2, dust powder in the air stream is collected by the filter 4, resulting in that a stain or clogging in the heat exchanger 2 can be prevented. In turn, the filter 4 is rotated by a roll 5 and an electric motor 6 at a speed of one rotation per hour, the dust powder collected at the upstream side of the filter 4 is blown off at the downstream side of the air stream and the filter 4 does not show any clogging at all. A seal member 7 may prevent a leakage of air to be passed through the heat exchanger 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a filter device for an air conditioner that is attached to an indoor heat exchanger of an air conditioner such as a package air conditioner.

[Conventional technology]

Various types of filter backs are attached to the upstream side of the air flow of indoor heat exchangers of various air conditioners such as package air conditioners and room air conditioners.

Filter devices are used to capture all the dust in the air, but their purpose is to purify indoor air.

One example is maintaining the performance of heat exchangers in air conditioners.

Usually, when the purpose is to purify indoor air, a high-performance filter device such as one equipped with an electrostatic precipitator is used, and when the purpose is to maintain the performance of a heat exchanger, a relatively simple filter device is used. Fig. 2 is a configuration diagram showing an example of a conventional filter device of the above-mentioned relatively simple type. The placed heat exchanger, (3) is a blower also placed inside the indoor unit, and (4) is installed in front of the above heat exchanger to capture dust etc. in the air entering the indoor unit. A filter as a filter device,
In a filter device configured in this way, a blower (
As a result of 3), the filter (4) captures all the dust and other particles in the air that are sucked into the indoor unit, completely preventing the surface of the heat exchanger (2) from becoming dirty or clogged and reducing heat exchange performance. .For such a filter (4), a fine net-like filter was generally used.

Here, the filter (4) becomes clogged due to collecting dust, etc., and if left as it is, the air volume of the air conditioner will decrease and the performance will deteriorate, so the filter (4) needs to be regularly cleaned or replaced. . Conventionally, to notify when it is time to clean or replace, a timer is used to measure a certain amount of time,
Methods such as detecting the pressure inside an air conditioner are known. In order to reduce the frequency of primary cleaning and replacement, a method is also known in which a roll-shaped filter is used in the filter device and the filter is wound up.

[Problem that the invention seeks to solve]

xI)'tz Conventional filter devices require periodic cleaning or replacement, and if the indoor unit of an air conditioner is installed in a ceiling, etc., it is extremely troublesome to clean and replace the filter. There was a problem.

This problem cannot be solved by notifying the user when it is time to clean and replace the filter, and using the roll-shaped filter is expensive and the capacity of the filter device is also large.

This invention was made in order to solve these problems, and provides a filter device for air conditioners that does not require cleaning or replacement, or does not require cleaning or replacement very often, and that protects inexpensive heat exchangers from dust. The purpose is to obtain.

[Means to solve the problem J An air conditioner internal filter device according to the present invention.

It is equipped with two continuous strip-shaped filters surrounding a metal heat exchanger and a means for rotating in the direction surrounding them.

[Operation J] In this invention, the filter captures all the dust, etc., in the air flow from the heat exchanger on the upstream side, and releases the captured dust on the downstream side.

[Embodiments of the invention]

FIG. 1 is a block diagram showing an embodiment of the present invention. (1
1 to (3) are the same as the conventional example in FIG.
1 is a rotatably supported roller, (6) is this roller (5
(7) is a sealing material attached to the indoor outer wall (f) of the heat output exchanger (12).

Filter (41), rotation means roll (5), electric motor (6
) to construct an air conditioner filter device.

In the filter device configured in this way.

Since the airflow passes through the filter [4] before passing through the heat exchanger (21), the dust in the entire airflow is captured by the filter (41), and as a result, the heat exchanger (21) can be prevented from becoming dirty or clogged.

On the other hand, the filter f41 is connected to the roll (5) and the electric motor (6).
The filter (41) is rotated at a speed of about one rotation per hour, and the dust captured on the upstream side of the airflow is blown away by wind pressure on the downstream side of the airflow, and the filter (41) does not cause clogging. The sealing material (7) prevents air from leaking through the heat exchanger (21).

In addition to the continuous rotation shown in the above embodiment, the filter (4) can be rotated intermittently at a constant pitch so that a predetermined portion of the filter (4) reciprocates between the upstream and downstream sides of the air flow. good. If the material of the filter (41) is made of Teflon, the removal of dust will be better.Also, in the above embodiment, the filter (4) surrounds only the heat exchanger (21), but it also surrounds the blower (31, etc.). You may.

〔Effect of the invention〕

As described above, in this invention, a continuous band-shaped filter is provided so as to go around the heat exchanger, and by making the filter rotate all the way around, there is an effect that cleaning or replacing the filter is not necessary or the frequency thereof is reduced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a block diagram showing a conventional filter device for an air conditioner. In the figure, (1) is the outer wall of the indoor unit, (2) is the heat exchanger, (3) is the blower, (41 is the filter, (5) is the roller, (6) is the electric motor, and (7) is the sealing material. The same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] a continuous band-shaped filter provided surrounding the heat exchanger so that air entering the heat exchanger of the air conditioner passes; and a rotating means for rotating the filter in a direction surrounding the heat exchanger. A filter device for an air conditioner, characterized by comprising: