KR20070041297A - Pre-filter for air conditioner and air conditioner using the same - Google Patents

Abstract

The problem of the present invention is that the dust and contaminants adhered to the pre-filter are easily peeled off, and the penetration of the contaminants can be prevented to have a high quality and antibacterial effect by the metal film, and to prevent damage during detachment.

In the present invention, in the pre-filter consisting of a resin fiber network such as PP, PET, ABS, etc. to collect dust of indoor air, and a resin frame supporting the resin fiber network, a metal film such as stainless on the surface of the resin fiber network Processing or sputtering was performed.

Housing, Resin Fiber Mesh, Heat Exchanger, Ventilation Fan, Air Filter

Description

Pre-filter for air conditioner and air conditioner using it {PRE-FILTER FOR AIR CONDITIONER AND AIR CONDITIONER USING THE SAME}

1 is a block diagram of an essential part of an air conditioner showing an embodiment of the present invention.

2 is a block diagram of a pre-filter showing an embodiment of the present invention.

3 is a view showing a state in which sputtering is performed on a resin fiber network.

4 is a diagram illustrating a state in which sputtering is performed on a resin fiber network and calender roll processing is performed.

5 is a graph showing the relationship between line diameter and glossiness.

6 is a graph showing the relationship between the line diameter and the opening;

Fig. 7 is a diagram showing the antimicrobial test results of a resin fiber network subjected to sputtering.

<Explanation of symbols for the main parts of the drawings>

1: housing

1a: suction port

1b: outlet

2: makeup frame

3: die frame

4: dew storage plate

5: heat exchanger

6: ventilating fan

7: air filter

8: prefilter

9: wind vane blade

10: indoor unit

11: prefilter frame

12: pre-filter network

13: metal film

14: longitudinal resin fiber

15: horizontal resin fiber

[Document 1] Japanese Unexamined Patent Publication No. 9-75633

[Document 2] Japanese Unexamined Patent Publication No. 2003-325398

[Document 3] Japanese Patent No. 03587192

TECHNICAL FIELD This invention relates to the air conditioner which has the pre-filter for dust collection which collects the dust contained at the time of sucking air.

The indoor unit of the air conditioner is provided with an indoor heat exchanger for conditioning indoor air. The indoor heat exchanger is formed of a plurality of fins made of aluminum and a copper refrigerant pipe inserted into a hole opened in these fins. The gap between the fin and the fin is a minute gap, and heat exchange is performed between the refrigerant and the air by allowing the air flow in the room to flow therebetween. Downflow of the airflow of the indoor heat exchanger is provided with a perfusion fan for blowing. When the perfusion fan rotates, indoor air is blown out of the air outlet through the heat exchanger and the perfusion fan from the air inlet provided in the indoor unit.

However, when the indoor air containing the dust is directly introduced into the heat exchanger, the dust adheres between the tip of the fin and the fin, thereby inhibiting the flow of air. For this reason, the filter (pre-filter) is provided in the upstream of a heat exchanger in order to collect the dust in air. The general filter is composed of a resin fiber network and a resin frame supporting the resin fiber network.

By the way, the dust adhered to this filter had a problem of trouble to remove the entanglement in the mesh of the filter. In addition, there is a problem in that contaminants including oil components are difficult to remove.

In Patent Document 1, titanium oxide is formed on the surface of the wire rod in order to decompose off-flavor components and contaminants attached to the window or the air conditioner filter through which a net is passed through a gap formed between the wire rods. Is described. However, since the wire rod itself is deteriorated by the photocatalytic action of titanium oxide, a titanium oxide film is formed on the surface of the metal network by sputtering titanium oxide.

On the other hand, Patent Literature 2 and Patent Literature 3 disclose techniques for improving the peelability of fibrous dust attached to an intake filter of a vacuum cleaner. That is, Patent Literature 2 describes improving the peelability of dust adhered to the intake filter by sputtering stainless steel in vacuum on the surface of the resin fiber of the intake filter of the vacuum cleaner. In addition, Patent Document 3 describes disposing the spun cloth sputtered with aluminum on the downstream side of the fine dust filter.

In addition, Patent Literature 2 sets the mesh size (number of meshes in one inch) of the intake filter to 200 to 350, and fine dust intake filter by setting the opening ratio of the mesh in the filter total area to 20 to 50%. It is described to prevent intrusion from the side of the electric blower side.

[Patent Document 1] Japanese Patent Application Laid-Open No. 9-75633

[Patent Document 2] Japanese Unexamined Patent Publication No. 2003-325398

[Patent Document 3] Japanese Patent No. 03587192

In the said patent document 1, when titanium oxide is sputtered directly to the resin wire which forms a net | wire, since a wire deteriorates by a photocatalytic action, there exists a problem that a wire should be made of metal and it becomes expensive.

In addition, in the said patent document 2, as mentioned above, the mesh size which is the number of meshes in 1 inch square of a filter is set to 200-300, and the opening ratio of the mesh in the filter whole area is set to 20-50%. As a result, sputtering is performed on the filter which prevents fine dust from entering the electric blower.

The filter in patent document 2 is for a vacuum cleaner, and must collect the dust suctioned through the suction port and the hose reliably as a characteristic of this filter. When such a filter is mounted as a pre-filter for an air conditioner as it is, there is a problem that the capacity of the refrigeration cycle of the air conditioner is lowered.

On the other hand, although the pre-filter for the indoor unit of the air conditioner is installed at a position exposed when the front panel of the indoor unit is opened, there is a problem that the design is not shiny and the design is bad even though the metal is sputtered onto the net. there was.

An object of the present invention is to provide a filter for an air conditioner in which dust and contaminants adhered easily.

A second object of the present invention is to provide a filter for an air conditioner, in which attached dust and contaminants are easily peeled off, suppressing a decrease in the refrigerating cycle capability of the air conditioner, and also excellent in design. It is an object of the present invention to provide a filter for an air conditioner in which dust and contaminants are easily peeled off.

A third object of the present invention is to provide an air conditioner in which dust and contaminants attached to the prefilter are easily peeled off.

A fourth object of the present invention is to provide an air conditioner equipped with a filter that is easily detached from dust and contaminants, suppresses a decrease in the refrigeration cycle capability of the air conditioner, and is also excellent in design.

The above object is a pre-filter for an air conditioner having a resin fiber net for collecting dust of indoor air and a resin frame for holding and fixing the resin fiber net, wherein the resin fiber net is provided on both surfaces of the resin fiber net or on one surface thereof. It is achieved by making a pre-filter for an air conditioner which made stainless adhere by sputtering.

Moreover, the said 2nd objective is the prefilter for air conditioners provided with the resin fiber net which collects the dust of indoor air, and the resin frame which supports and fixes this resin fiber net, WHEREIN: The surface or one side of both surfaces of the said resin fiber net. Stainless steel is attached to the surface of the cotton by sputtering, and the opening ratio of the resin fiber network is 55% to 60%, and the wire diameter of the wire rod constituting the resin fiber network is 150 µm to 220 µm. It is achieved by making a filter.

In addition, the third object is an indoor unit having an air outlet at the upper portion and a lower portion of the suction port, an indoor heat exchanger installed in the indoor unit, a fan provided between the indoor heat exchanger and the air outlet, and an air flow upstream of the indoor heat exchanger. In the air conditioner provided with the prefilter, the prefilter is achieved by using an air conditioner in which stainless is attached to the surfaces of both sides of the resin fiber network or the surfaces of one side by sputtering.

In addition, the fourth object is an indoor unit having an outlet at the upper portion and a lower portion of the intake port, an indoor heat exchanger installed in the indoor unit, a fan provided between the indoor heat exchanger and the air blower outlet, and a pre-installed upstream of the air flow of the indoor heat exchanger. In the air conditioner provided with a filter, the pre-filter is attached to the surface of both surfaces or one surface of the resin fiber network by sputtering to make the opening ratio of the resin fiber network to 55% to 60%, It is achieved by setting it as the air conditioner which made the wire diameter of the wire rod which comprises a resin fiber network into 150 micrometers-220 micrometers.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First, the air conditioner to which the pre-filter according to the present embodiment is applied will be described with reference to FIG. 1 is a longitudinal sectional view of an indoor unit of an air conditioner to which the prefilter of the present embodiment is applied.

The indoor unit 10 of the air conditioner is composed of the housing 1, the heat exchanger 5 and the ventilation fan 6 as main components.

The housing 1 is comprised of the makeup frame 2 and the die frame 3, and has the inlet port 1a in the upper part and the blowout port 1b in the lower part. The ventilation fan 6 (perfusion fan) is disposed in the center part of the housing 1, and operates to suck the indoor air from the inlet port 1a and to blow it out of the outlet port 1b, as indicated by the white arrow. do. The heat exchanger 5 is arrange | positioned at the suction side of the ventilation fan 6 so that heat exchange with indoor air may be carried out. In this heat exchanger (5), a refrigerant for cooling or heating indoor air flows through the inside. The heat exchanger 5 is formed in substantially inverted V shape, and dew accommodating plates 4a and 4b are provided at both front and rear lower ends of the heat exchanger 5.

The air filter 7 and the prefilter 8 are provided on the suction side of the heat exchanger 5 for dust removal and air purification of indoor air. The air-conditioned room air is blown out from the blowout port 1b to the room. The wind direction blade 9 changes the blowout direction at the time of cooling and heating. In the cooling operation of the air conditioner, the indoor air is sucked into the housing 1 from the inlet port 1a, is dust-repelled and air-cleaned in the prefilter 8 and the air filter 7, and in the heat exchanger 5 After cooling, it is taken out from the ventilation fan 6 to the room via the blowout port 1b.

The prefilter 8 according to the present embodiment is attached so as to close the entire suction port of the front side of the rounded air conditioner due to the structure of the air conditioner. If a lot of dust is attached, the resistance of the air flow becomes low, and the heat exchange performance of the heat exchanger is lowered, thereby lowering the capacity of the refrigeration cycle. For this reason, the user needs to clean the prefilter 8 regularly. The user performs attachment and detachment of the prefilter 8 for cleaning the prefilter 8. At this time, since the front of the air conditioner indoor unit 10 is rounded, the pre-filter is detached by sliding the attachment guide provided on the indoor unit 10. The surface of the pre-filter 8 in which the conventional resin is exposed has a problem of being easily damaged because it comes into contact with the guide.

In the conventional cleaning of the pre-filter 8, after removing dust using a vacuum cleaner or the like, a detergent or the like is applied to a sponge or a soft brush to wash away dust or contaminants that have not been completely sucked. However, a wire whose wire rod is made of resin fibers is thin and easily damaged when rubbed. In addition, the net of the conventional prefilter is the surface in which resin, such as PP, PET, and ABS, was exposed. The shaping | molding method of the net which comprises this filter is the method of injecting melted resin from a nozzle and carrying out a cooling hardening. For this reason, even if the surface of the network to which the resin is exposed is smooth, there are many fine holes. Since the fine particles floating in the air, the smoke of cigarettes, and the like are attached to the fine holes and are introduced into the fine holes, contaminants such as dust entering the fine holes cannot be easily removed even if the prefilter is periodically cleaned. In addition, in recent years, while the orientation for cleanliness has increased, a tool that can be easily cleaned such as a hand mop has been commercially available, and there is a demand for the rapid removal of contaminants using the hand mob. In addition, there has been developed a cleaning mechanism that automatically sucks contaminants attached to the prefilter. The suction force of this cleaning device is very weak compared to the vacuum cleaner which cleans the floor surface. Even with such a weak suction force, it is necessary to peel off the contaminants adhering to the prefilter 8. In addition, there is a need for a prefilter 8 capable of removing contaminants without labor without using a cleaning mechanism.

Moreover, in addition to such a cleanliness orientation, safety orientation is also increasing, and the market of the antimicrobial processed product which has an antimicrobial function among them expands year by year. In recent years, with the densification of houses, it has become a living environment in which bacteria are easily proliferated due to the increase of moisture and lack of ventilation. In order to realize a comfortable and hygienic living environment, the antibacterial requirements of air conditioners are increasing.

Moreover, the prefilter 8 is arrange | positioned in the whole front surface of the front part of the indoor unit 10 of an air conditioner, and it is comparatively easy to see, and it is one of the parts which influences the design and quality of an air conditioner. Adopting the filter which gave a sense of quality improves the design, sense of quality of an air conditioner.

As shown in FIG. 2, the structure of the pre-filter 8 of this embodiment is comprised by the resin frame 12 for supporting and fixing the resin fiber network 11 and the resin fiber network 11. As shown in FIG. The resin fiber net 11 of the conventional prefilter is a surface on which resins such as PP, PET, and ABS are exposed, and since the molding method of the fiber is a method of injecting dissolved resin from a nozzle, cooling, and curing the resin, the resin is exposed. The surface looks smooth, but there are many micropores. Since the air floating dust, tobacco smoke, etc. adhere to these holes and lead them into the fine holes, contaminants such as dust entering the fine holes cannot be removed even if the prefilter 8 is periodically cleaned.

Thus, as shown in the cross-sectional view of the resin fiber network 11 shown in FIG. 3, an inert gas such as argon gas ionized in a vacuum is collided with a metal such as stainless, and the metal particles protruding are deposited on the resin fiber network 11. By the sputtering process, a metal film 13 such as stainless is formed on the surface of the resin fiber network 11. As a result, by filling the fine pores on the surface of the resin fiber network 11 and smoothing the surface to a nano size, dust and contaminants are likely to be peeled off, thereby preventing the infiltration of contaminants.

Here, sputtering is performed on the entire surface of the resin fiber network 11, which is both upstream and downstream of the intake air flow of the indoor air, thereby improving the peeling property of dust and reducing the permeability of contaminants. The effect can be sufficiently obtained by processing only the upstream side with respect to the intake air stream of the indoor air, and the cost can be reduced.

In addition, as shown in Fig. 4, by applying heat to the resin fiber network 11 and pressing the roller with a roller, a flat portion can be formed at the intersection of the longitudinal fibers 14 and the transverse fibers 15, and the resin By making the fiber net 11 more smooth, it can make it easy to peel dust.

Moreover, the design of the prefilter 8 can be improved by the metallic feeling which formed the metal film 13 by sputtering process, and the quality of an air conditioner can be improved.

However, it was judged by various experiments that this metallic feeling, especially glossiness, appeared or did not appear according to conditions. Here, Fig. 5 shows the relationship between the wire diameter of the resin fiber network 11 and the sputtering surface surface glossiness when the resin fiber network 11 is sputtered with a stainless steel material as the metal film 13. . The glossiness was measured using the glossmeter. A thicker wire diameter increases glossiness because it increases the spattered surface. The glossiness of 10 or more is required in order to give the metallic feeling for improving the designability and the high-quality feeling of the prefilter 8, and the wire diameter must be 150 micrometers or more.

In addition, in order to ensure the pressure loss of an air conditioner, the opening ratio of the mesh in the resin fiber network 11 whole area must be 55%-60%. This is because the cleaner must also suck fine dust, whereas the pre-filter 8 for the air conditioner mainly aims at removing the relatively large dust which causes the indoor heat exchanger 5 to be clogged. Therefore, it cannot be set to the opening ratio which degrades the capability of the indoor heat exchanger 5. When the opening ratio is determined, when the wire diameter of the wire rod is made thick, the opening (the distance between the yarn and the yarn of the resin fibrous network 11, the size of the mesh) is enlarged, and large dust passes. 6 shows the relationship between the wire diameter and the opening in the opening ratio of 60%.

5 and 6 show the following. The thicker wire diameter improves the metallic feel, but the larger the opening, the larger the dust. Conversely, the thinner the linear, the smaller the opening, but this time the glossiness is lowered and the design is worse.

For example, when the wire diameter is 230 µm, the glossiness of the surface of the prefilter 8 is good, but the opening is about 800 µm, and the dust collection efficiency is lowered. Usually, an air purifier is equipped with the electrostatic precipitator or the charging filter, and dust below 50 micrometers can be removed by these. If such an electrostatic precipitator or charging filter is attached to the indoor unit 10 as the air filter 7, dust of 50 µm or less can be removed.

On the other hand, when the line diameter of the prefilter 8 is set to 230 µm, dust of 50 µm to 800 µm or less passes through the mesh of the prefilter 8 in principle. However, 800 micrometers or more of long fibers (a yarn baffle) etc. are affixed to the prefilter 8, and it can collect also fine dust on the attached yarn baffle, but passing a dust of 800 micrometers or more is not preferable. This generally means that the distance between the fins of the indoor heat exchanger 5 is around 1.2 mm, and 800 µm is a dust having a dimension of 67% larger than 65% of the gap between the fins. It is difficult for such large dust to pass between two fins at the same time, which causes clogging of the heat exchanger. Therefore, in the present Example, the upper limit of the wire diameter was 220 micrometers. The distance of opening at this time is 766 micrometers, and is 64% of the distance between pins.

From these, a prefilter having a good wire diameter of 150 m to 220 m and a mesh size of 24 to 40 and an opening ratio of 55 to 60%, which does not allow a large dust to pass while maintaining satisfactory glossiness, and has good dust and dirt removal. 8) can be provided.

In addition, you may perform the said sputtering process and calender roll process by any of the honeycomb weave and the plain weave which are the general structures of the resin fiber net 11. However, in the conventional cleaning of the pre-filter 8, after removing dust using a vacuum cleaner or the like, a detergent or the like is applied to a sponge or a soft brush to wash away dust or contaminants that have not been completely sucked. As mentioned above, in recent years, while the orientation for cleaning has been increased, tools that can be easily cleaned such as hand mobs have been commercially available, and there has been a demand to quickly wipe contaminants using the hand mobs. In addition, even if the cleaning mechanism having a weak suction force that automatically sucks the contaminants adhering to the prefilter, it is necessary to allow the contaminants adhering to the prefilter 8 to be peeled off.

Conventionally, the structure of the resin fiber network 11 is a honeycomb structure in which a structure is three-dimensionally woven, and dust collecting efficiency of dust easily sticks to the resin fiber is high. Dust remains on Moreover, even if it moves while inhaling the dust on the surface of the prefilter 8 with the cleaning mechanism of weak suction force, dust will remain in unevenness | corrugation.

Therefore, there is an advantage that the surface of the prefilter 8 can be made smoother by making the structure of the prefilter 8 a plain weave structure, and the user is easy to clean.

The surface of the resin fiber network 11 attached to the resin frame 12 may be attached to either the upstream side or the downstream side with respect to the intake air flow of the indoor air. However, the pre-filter 8 is generally attached to block the entire surface of the inlet port 1a on the front and surface of the air conditioner, which is rounded, and requires frequent cleaning so that the user's detachment operation is frequently performed. All. At this time, the resin frame 12 is attached to the upstream side of the intake air stream of the indoor air because the surface of the prefilter 8 is easily detached to slide along the attachment guide to the air conditioner. Was preventing damage.

However, by sputtering at least the sliding portion of the resin fiber net 11 in contact with the guide, the metal film 13 can be protected, and the damage of the resin fiber net 11 can be prevented. Since the resin frame 12 can be arrange | positioned downstream of the intake air stream of indoor air, there exists an advantage that the unevenness | corrugation by the resin frame 12 disappears in the surface to which dust adheres, and it is easy to clean.

Fig. 7 shows the results of evaluation of the antibacterial performance of the resin fiber net 11 sputtered stainless steel and the resin fiber net 11 without sputtering on the basis of JISZ2801. This measurement was performed by a public institution.

According to this result, it was found that the antibacterial activity of Staphylococcus aureus and Escherichia coli satisfies the standard value of 2.0 or more, and the effect of inhibiting the growth of the bacterium can be obtained. As a result, by forming a metal film 13 made of stainless steel on the surface of the resin fiber network 11 by sputtering, an antibacterial effect can be obtained, and a comfortable and hygienic living environment in response to the antimicrobial demands for recent safety orientations is achieved. In order to realize the air conditioner can be provided.

According to the present invention as described above, it is possible to provide a filter for an air conditioner in which dust and contaminants adhered easily.

Further, according to the present invention, it is possible to provide a filter for an air conditioner, in which dust and contaminants adhered to the surface are easily peeled off, a reduction in the refrigeration cycle capacity of the air conditioner is suppressed, and the design is excellent.

Further, according to the present invention, it is possible to provide an air conditioner in which dust and contaminants adhered to the prefilter are easily peeled off.

Further, according to the present invention, it is possible to provide an air conditioner equipped with a filter that is easy to peel off adhered dust and contaminants, suppresses the decrease in the refrigeration cycle capability of the air conditioner, and is also excellent in design.

Claims (6)

In the pre-filter for an air conditioner provided with the resin fiber net which collects dust of indoor air, and the resin frame which supports and fixes this resin fiber net, A pre-filter for an air conditioner, wherein stainless steel is attached by sputtering to the surfaces of both surfaces or one surface of the resin fiber network. The prefilter for air conditioners of Claim 1 which performed the calender roll process which smoothes the intersection part of the longitudinal fiber of the said resin fiber network. The pre-filter for an air conditioner according to claim 1, wherein stainless steel is attached by sputtering to a portion in sliding contact with a guide installed in the indoor unit of the air conditioner. In the pre-filter for an air conditioner provided with the resin fiber net which collects dust of indoor air, and the resin frame which supports and fixes this resin fiber net, Stainless steel is attached to the surfaces of both surfaces or one surface of the resin fiber network by sputtering, so that the opening ratio of the resin fiber network is 55% to 60%, and the wire diameter of the wire rod constituting the resin fiber network is 150. A prefilter for an air conditioner having a thickness of from mu m to 220 mu m. Air having an indoor unit having a suction port in the upper portion and a blower outlet in the lower portion, an indoor heat exchanger installed in the indoor unit, a fan provided between the indoor heat exchanger and the air outlet, and a pre-filter installed upstream of the air flow of the indoor heat exchanger. In the conditioner, The pre-filter is an air conditioner in which stainless is attached to the surfaces of both surfaces of the resin fiber network or the surfaces of one side by sputtering. Air having an indoor unit having a suction port in the upper portion and a blower outlet in the lower portion, an indoor heat exchanger installed in the indoor unit, a fan provided between the indoor heat exchanger and the air outlet, and a pre-filter installed upstream of the air flow of the indoor heat exchanger. In the conditioner, The pre-filter is formed by sputtering stainless on the surfaces of both surfaces or one surface of the resin fiber network to make the opening ratio of the resin fiber network 55% to 60%, and the wire of the wire rod constituting the resin fiber network. An air conditioner having a diameter of 150 µm to 220 µm.

Images