JP7457885B2 - air purifying filter - Google Patents

Description

The present invention relates to an air purifying filter used, for example, in an air conditioner.

Conventionally, this type of air purifying filter consists of a flexible net through which the airflow passes, a reinforcement part, and a frame part. The reinforcing portions include a large number of rod-shaped horizontal reinforcing portions extending in the horizontal direction and a large number of rod-shaped vertical reinforcing portions extending in the vertical direction perpendicular to the horizontal direction. The frame portion is configured to be connected to the reinforcing portion. The net is insert molded into the reinforcing part and the frame part. (Incidentally, as a prior document related to this, there is the following Patent Document 1).

JP 2019-060583 Publication

The problem with conventional air purifying filters is that due to variations in the external dimensions of the net, if the net is small, there will be a defective area where the airflow passes through the area that does not pass through the net. The problem is that during insert molding, the engagement allowance of the frame portion becomes large, causing deformation of the flexible net peripheral edge, resulting in an appearance defect in which the net protrudes from the outside of the frame portion.

To achieve this objective, the present invention provides an air purifying filter comprising a net through which air flows, a lattice-shaped reinforcing portion provided along the surface of the net, a peripheral portion of the net, and a frame portion connecting the ends of the reinforcing portion, the reinforcing portion and the frame portion being injection molded products made of a resin material, the net being fixed to the reinforcing portion and the frame portion, the net, the reinforcing portion, and the frame portion being insert molded products, the filter comprising a leeward frame portion provided along the leeward surface of the net, an annular inner protrusion protruding from the inner edge of the leeward frame portion through the net to the windward side of the net, and an outer protrusion protruding from the leeward frame portion to the windward side of the net at a predetermined distance outside the inner protrusion, the peripheral end of the net being disposed between the inner protrusion and the outer protrusion, thereby achieving the intended objective.

According to the present invention, even if variations occur in the external dimensions of the net, it is possible to obtain the effect of preventing a decrease in the performance of the air purifying filter and the effect of improving the appearance quality.

FIG. 1 is an external perspective view of a dehumidifier according to a first embodiment of the present invention; Interior development diagram of the dehumidifier Schematic AA sectional view of the dehumidification device Schematic BB sectional view of the dehumidification device External perspective view of the radiator of the dehumidifier External perspective view of the heat absorber of the dehumidifier External perspective view and detailed external perspective view of the suction port of the dehumidifier C-C sectional view of the suction port of the dehumidifier CC sectional view of the suction port according to Embodiment 2 of the present invention

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1)
FIG. 1 is an external perspective view of a dehumidifier according to Embodiment 1 of the present invention. FIG. 2 is an exploded perspective view of the dehumidifier according to Embodiment 1 of the present invention. Note that FIGS. 1 and 2 are views of the dehumidifier as viewed from the rear side. 3 and 4 are schematic cross-sectional views of a dehumidifying device according to Embodiment 1 of the present invention. Note that FIG. 3 is a cross-sectional view taken along the line AA in FIG. FIG. 4 is a sectional view taken along line BB in FIG. Note that for convenience of explanation, the following may be described below. That is, as shown in FIG. 1, the vertical direction in a state where the dehumidifier 100 is installed may be described as an up-down direction. Similarly, the upper surface of the dehumidifier 100 in a state where the dehumidifier 100 is installed as shown in FIG. 1 may be referred to as a "top surface." Similarly, as shown in FIG. 1, the front surface of the dehumidifier 100 when it is installed may be referred to as the "front surface", and the rear surface of the dehumidifier 100 may be referred to as the "rear surface". be.

As shown in Figures 1, 2, 3, and 4, the main body case 1 has a horizontally long, approximately rectangular parallelepiped shape. Specifically, the main body case 1 has a shape in which the size in the horizontal direction W is larger than the size in the depth direction D and the vertical direction H, and an intake port 2 is arranged on the rear surface of the main body case 1 (one side surface in the depth direction of the main body case 1). An exhaust port 3 is arranged on the upper part of the main body case 1. The exhaust port 3 has a horizontally long rectangular shape and opens to the top and rear surface of the main body case 1. The rear side of the top surface of the main body case 1 (one side surface in the depth direction of the main body case 1) has a louver 4 that changes the direction of air from the exhaust port 3, and the front side of the top surface of the main body case 1 (the other side in the depth direction of the main body case) has an operation unit 5. The operation unit 5 has multiple switches for turning the power on and off, changing the operating mode, etc.

The main body case 1 includes a heat pump 6, a blower section 7, a dehumidifying rotor section 8, a mounting base 9, a water storage tank section 10, and a control section 11.

The heat pump 6 has a configuration in which a compressor 12, a radiator 13, an expander 14, and a heat absorber 15 are sequentially connected in an annular manner to circulate a refrigerant.

The compressor 12 is arranged on the left side of the main body case 1 (one side surface side in the lateral direction (longitudinal direction) of the main body case 1) when viewed from the front side of the main body case 1. The compressor 12 is fixed on the bottom surface of the main body case 1.

The heat radiator 13 is arranged on the rear surface side of the main body case 1 (one side surface side in the depth direction of the main body case). The heat radiator 13 is arranged on the bottom surface of the main body case 1 so that a gap between adjacent heat radiating fins in the radiator 13 (described later) faces the suction port 2 of the main body case 1.

FIG. 5 is an external perspective view of the radiator of the dehumidifier according to Embodiment 1 of the present invention. Note that FIG. 5 is a diagram of the radiator of the dehumidifying device viewed from the rear side.

As shown in FIG. 5, the heat radiator 13 has a large number of heat radiating fins 13a and a connecting pipe 13b that connects the large number of fins.

The heat dissipation fins 13a are in the shape of vertically elongated rectangular plates and are made of aluminum. The numerous heat dissipation fins 13a are arranged so that the faces of adjacent heat dissipation fins 13a face each other. The gaps between adjacent heat dissipation fins 13a form air passages.

The connecting pipe 13b has a cylindrical shape and is made of copper. The cylindrical connecting pipe 13b is provided in multiple stages in the longitudinal direction of the radiation fin 13a, and is bent multiple times in a meandering manner. A large number of radiation fins 13a are fixed to the straight pipe portion of the connecting pipe 13b. A large number of radiation fins 13a are stacked at predetermined intervals in the direction of the central axis of the straight pipe portion of the connecting pipe 13b.

As shown in FIGS. 2 and 4, the heat absorber 15 is disposed on the right side of the main body case 1 (the other side surface side in the lateral direction of the main body case 1) when viewed from the front of the main body case 1, and the heat absorber 15, which will be described later, It is fixed to the mounting base 9 so that the central axis of the air passage, which is the gap between the adjacent heat-absorbing fins 15a in the main body case 1, extends in the left-right direction of the main body case 1.

FIG. 6 is an external perspective view of the heat absorber of the dehumidifier according to Embodiment 1 of the present invention. Note that FIG. 6 is a view of the radiator of the dehumidifier as viewed from the left side of the main body case.

As shown in FIG. 6, the heat absorber 15 has a large number of heat absorbing fins 15a and a connecting pipe 15b that connects the large number of fins.

The heat absorbing fin 15a has a vertically long rectangular plate shape and is made of aluminum. The large number of heat-absorbing fins 15a are arranged such that the surfaces of adjacent heat-absorbing fins 15a face each other. A gap between adjacent heat absorbing fins 15a becomes an air path.

The connecting pipe 15b has a cylindrical shape and is made of copper. The cylindrical connecting pipe 15b is provided in multiple stages in the longitudinal direction of the heat-absorbing fin 15a, and is bent multiple times in a meandering manner. A large number of heat-absorbing fins 15a are fixed to the straight pipe portion of the connecting pipe 15b. A large number of heat-absorbing fins 15a are stacked at predetermined intervals in the direction of the central axis of the straight pipe portion of the connecting pipe 15b.

As shown in FIGS. 2 and 4, the blower section 7 is arranged to face the radiator 13 and is fixed to the mounting base 9. The air blower 7, the radiator 13, and the suction port 2 of the main case 1 are arranged in a straight line in the depth direction of the main case 1. The blower section 7 includes a motor 16, a fan 17 rotated by the motor 16, and a casing 18 surrounding the fan 17.

The fan 17 is a turbo fan and includes a main plate 17a, a large number of blades 17b, and a suction ring 17c.

The main plate 17a has a substantially disk shape with a downwardly convex central portion, and a cylindrical rotating shaft fixing portion 17d is provided in the central portion. The rotating shaft fixing part 17d has a structure in which the rotating shaft of the motor 16 is inserted and can be fixed to this rotating shaft. The peripheral edge of the main plate 17a has a plurality of blades 17b extending downward from the main plate 17a, and the blades 17b have a wing-shaped horizontal cross section. The end portion of the blade 17b on the peripheral edge side of the main plate 17a has a shape facing in a direction opposite to the rotation direction of the fan 17. A circular suction ring 17c is provided at the lower end of the plurality of blades 17b.

The casing 18 has an intake port 18a on the bottom surface and a discharge port 18b on the top surface. When the fan 17 is rotated by the motor 16, air sucked in from the intake port 18a of the casing 18 flows into the fan 17 through the suction ring 17c of the fan 17. The air that has flowed in is blown out in the radial direction of the fan 17 along the blades 17b, and is blown to the air outlet 3 of the main body case 1 via the outlet 18b of the casing 18.

The dehumidifying rotor section 8 is arranged between the blower section 7 and the heat absorber 15. The heat absorber 15, the dehumidifying rotor section 8, and the air blower section 7 are arranged in a straight line in the lateral direction of the main body case 1. The dehumidifying rotor section 8 includes a dehumidifying rotor 19, a rotor frame 20, a driving section 21, and a heating section 22.

The dehumidifying rotor 19 has a disk shape as a whole. This disc body is a circular ring in which a ventilation body is provided. The ventilation body has a second band (not shown) provided in a zigzag pattern between two first bands (not shown), and is arranged in a spiral shape from the inner circumference to the outer circumference within the circular ring. It has a ventilation structure by winding it around the body. These first and second strips are made of heat-resistant fibers, and a moisture-absorbing substance such as zeolite is adhered to the surface of the fibers using, for example, a silica-based adhesive.

The dehumidifying rotor 19 is formed into a disk shape, is rotatably erected on the rotor frame 20 so that its central axis extends in the left-right direction of the main body case 1, and is rotated by a driving portion 21. The rotor frame 20 is fixed to the mounting base 9. The dehumidifying rotor 19 has a moisture absorption section 19a that adsorbs moisture from the air, and a moisture release section 19b that releases moisture into the air.

The heating portion 22 is installed to face the moisture releasing portion 19b of the dehumidifying rotor 19. The heating portion 22 is arranged on the upstream side of the moisture releasing portion 19b of the dehumidifying rotor 19 in the air path described later.

The mounting base 9 has a box shape with open bottom and front surfaces of the main body case 1, and includes a mounting plate 9a and support legs 9b.

The mounting plate 9a has a substantially rectangular plate shape, and the air blowing section 7, the dehumidifying rotor section 8, and the heat absorber 15 are fixed to the upper surface.

The support legs 9b are three rectangular plates that extend downward from the periphery of the mounting plate 9a. The plate is integrally formed. The support leg 9b has a substantially rectangular parallelepiped-shaped space 9c between the mounting plate 9a and the bottom surface of the main body case 1. The height of the space 9c is approximately the same as the height of the support leg 9b, and the water storage tank 10 is installed in the space 9c.

The water tank section 10 is disposed in the lower space 9c of the main body case 1, and is configured to be detachable from the front surface of the main body case 1 (one side surface in the depth direction of the main body case). The attachment/detachment direction of the water storage tank portion 10 is the front-rear direction of the main body case 1 (the depth direction of the main body case). A ventilation section 7, a dehumidifying rotor section 8, and a heat absorber 15 are arranged above the water storage tank section 10. The water storage tank section 10 includes a flat box-shaped tank 10a with an open top and a funnel-shaped water collecting cover 10b. The water collecting cover 10b is removably provided on the upper part of the tank 10a. That is, the structure is such that dew condensation is caused by the heat absorber 15, and the condensed water is collected by the funnel-shaped water collection cover 10b and flows into the tank 10a.

The control unit 11 is disposed on the right side of the main body case 1 (one side surface side in the lateral direction of the main body case 1) when viewed from the front side of the main body case 1. The control unit 11 is fixed on the bottom surface of the main body case 1. The control section 11 controls the motor 16 of the blower section 7, the compressor 12, and the drive section 21 and heating section 22 of the dehumidifying rotor section 8 based on a switch on the operation section 5 pressed by the user.

The main body case 1 includes a first air passage 23 and a second air passage 24.

The first air passage 23 uses the air blower 7 to suck air from the suction port 2 and supply it to the heat radiator 13 , the heating section 22 , the moisture release section 19 b , the heat absorber 15 , and the moisture absorption section 19 a in this order. This is an air path through which the air is discharged from the air outlet 3.

The second air passage 24 is an air passage in which the air is sucked from the suction port 2 by the air blower 7, supplied to the radiator 13, and is discharged from the air outlet 3 via the air blower 7.

To explain in detail, in the first air passage 23, the indoor air warmed by the radiator 13 is further warmed by the heating portion 22, and is supplied to the moisture radiating portion 19b of the dehumidifying rotor 19. In the moisture release section 19b, the moisture adsorbed by the moisture absorption section 19a is moved to the moisture release section 19b by rotation of the dehumidification rotor 19, and is released into the supplied air by heating of the heating section 22. This high-humidity air is supplied to the heat absorber 15, where it is cooled to form dew condensation, and moisture is extracted as water droplets. Thereafter, the cooled air is supplied to the moisture absorption section 19a of the dehumidification rotor 19, and the moisture in the air is further adsorbed by the moisture absorption section 19a, resulting in dry air. Furthermore, since heat of adsorption is generated when moisture is adsorbed, indoor air is sucked into the air blowing section 7 with reduced humidity and increased temperature, and is blown into the room from the air outlet 3. Note that the moisture condensed in the heat absorber 15 drips downward as water droplets and flows into the tank 10a of the water storage tank section 10.

In the second air passage 24, the indoor air warmed by the radiator 13 is sucked into the air blower 7, and is blown into the room from the air outlet 3. That is, the air passing through the first air passage 23 and the air passing through the second air passage 24 are mixed in the air blowing section 7, and are blown out from the air outlet 3 by the air blowing section 7.

As shown in FIGS. 7 and 8, an air purifying filter 30 is fixed to the suction port 2. As shown in FIGS. Note that the air purifying filter 30 may be configured to be detachable from the suction port 2.
The air purifying filter 30 includes a net 31, a reinforcing portion 32, and a frame portion 33. The reinforcing part 32 and the frame part 33 are made of a resin material and are injection molded, and the net 31 is insert molded into the reinforcing part 32 and the frame part 33 when the reinforcing part 32 and the frame part 33 are injection molded. The reinforcing part 32 and the frame part 33 are injection molded products made of resin material, the net 31 is fixed to the reinforcing part 32 and the frame part 33, and the net 31, the reinforcing part 32, and the frame part 33 are , is an insert molded product.

The net 31 has many small openings through which airflow passes. One example is a flexible structure in which a plurality of resin fibers are arranged in parallel at a certain interval and woven vertically in a lattice pattern.

The reinforcing portion 32 has a grid shape, is provided along the surface of the net 31, and is fixed to the net 31. The reinforcing portion 32 is fixed to the net 31 by entering into the opening of the net 31 and hardening during injection molding.

The frame portion 33 connects the peripheral portion of the net 31 and the end portion of the reinforcing portion 32. The frame portion 33 is fixed to the net 31 by entering into the opening at the end of the net and hardening during injection molding. The frame portion 33 is fixed to the reinforcing portion 32 by connecting and hardening with the reinforcing portion 32 during injection molding.

Here we explain an example of insert molding.

First, the net 31 is attached to a cavity mold (fixed side) for injection molding an air purifying filter. The cavity mold (fixed side) is provided with a plurality of needle-like projections, and the net 31 is inserted into these projections to attach the net 31 to the cavity mold (fixed side). When the net 31 is attached to the cavity mold (fixed side), a part of one side of the net 31 comes into contact with a part of the cavity mold (fixed side).

Next, the core mold (movable side) moves to the cavity mold (fixed side) side. At this time, a part of the core mold (movable side) comes into contact with a part of the other side surface of the net 31. There is a partial gap between the cavity mold (fixed side) that is not in contact with the net 31 and the core mold (movable side) that is not in contact with the net 31.

Next, resin is poured into the gap between the cavity mold (fixed side) and the core mold (movable side). The resin flowing into the gap between the cavity mold (fixed side) and the core mold (movable side) becomes the reinforcing part 32 and the frame part 33. At this time, a portion of the resin that has flowed into the gap between the cavity mold (fixed side) and the core mold (movable side) also enters into the opening of the net 31.

Next, after the resin has hardened, the core mold (movable side) moves together with the air purification filter and separates from the cavity mold (fixed side).

Finally, the air purifying filter is pushed out from the core mold (movable side) by an extrusion pin protruding from the core mold (movable side) and removed.

Generally, in the case of a suction port, the cavity type (fixed side) is on the windward side (exterior side), and the core type (movable side) is on the leeward side (interior side).

The frame portion 33 of the air purifying filter has a leeward side frame portion 34, an inner protrusion 35, and an outer protrusion 36.

The leeward side frame portion 34 is provided along the leeward side surface of the net 31.

The inner protrusion 35 has a square annular shape, and protrudes from the inner edge of the leeward frame portion 34 to the windward side of the net 31 via the net 31.

The outer protrusion 36 has a predetermined distance outside the inner protrusion 35 and protrudes from the leeward frame 34 toward the windward side of the net 31.

A feature of this embodiment is that the peripheral end of the net 31 is arranged between the inner protrusion 35 and the outer protrusion 36.

As a result, if the net 31 is shorter than the regular size due to variations in the outer dimensions of the net 31, the circumferential edge of the net 31 will be sandwiched between the inner protrusion 35 area and the leeward frame 34, so It has the effect of sucking air into the main body.

In addition, even if the net 31 is longer than the standard size due to variations in the external dimensions of the net 31, the peripheral end of the net 31 is sandwiched between the area between the inner protrusion 35 and the outer protrusion 36 and the leeward frame 34. .

Furthermore, in the region between the inner protrusion 35 and the outer protrusion 36, the cavity mold (fixed side) and the vicinity of the peripheral end of the net 31 come into contact, and the net 31 is positioned. As a result, the net does not protrude into the external appearance area outside the outer protrusion 36, but stands out in the area between the inner protrusion 35 and the outer protrusion 36, which are relatively recessed from the appearance area, so that when viewed from the outside, the net 31 has the effect of making the peripheral edge less noticeable. Therefore, even if variations occur in the external dimensions of the net 31, it is possible to prevent the performance of the air purifying filter from deteriorating and to improve the appearance quality.

Further, on the inside of the outer protrusion 36, there is a central protrusion 37 that protrudes from the leeward side frame part 34 to the windward side of the net 31 via the net 31. The central protrusion 37 is connected to the outer protrusion 36 and is spaced from the inner protrusion 35 by a predetermined distance. The dimension in which the central protrusion 37 protrudes from the leeward frame 34 is smaller than the dimension in which the outer protrusion 36 protrudes from the leeward frame 34 .

As a result, when the net 31 is longer than the standard size due to variations in the external dimensions, the peripheral end of the net 31 is sandwiched between the central protrusion 37 and the leeward frame 34, and the cavity side mold comes into contact with the vicinity of the peripheral end of the net 31 in the region between the inner protrusion 35 and the outer protrusion 36, positioning the net 31. Therefore, the peripheral end of the net 31 does not protrude in the external appearance region outside the outer protrusion 36, but protrudes in the central protrusion 37 region that is relatively recessed from the external appearance region. However, since the central protrusion 37 protrudes, the peripheral end of the net 31 is less likely to protrude, which has the effect of making the peripheral end of the net 31 even less noticeable when viewed from the outside. Therefore, even if there is variation in the external dimensions of the net 31, the external appearance quality can be further improved.

(Embodiment 2)
Components similar to those in FIGS. 1 to 7 are denoted by the same reference numerals, and detailed description thereof will be omitted. As shown in FIG. 9, the shape of the leeward side frame portion 34 on the leeward side of the net of the outer protrusion portion 36 and the central protrusion portion 37 includes a leeward frame recessed portion 38 that is recessed toward the windward side of the net 31. .

As a result, the leeward side frame portion 34 on the leeward side of the net is recessed toward the windward side of the net 31 according to the amount of protrusion of the outer protruding portion 36 and the central protruding portion 37, so that the wall thickness of the frame portion 33 is made uniform. Also, the amount of shrinkage of the resin during molding is made uniform. As a result, the outer protrusion 36 and the central protrusion 37 have the effect of preventing sink marks and deformation on the exterior side, so that the exterior quality can be further improved.

The air purifying filter according to the present invention can prevent deterioration in the performance of the air purifying filter and improve the appearance quality, and is therefore useful as a blower device used for air purification.

1 Main body case 2 Suction port 3 Air outlet 4 Louver 5 Operation part 6 Heat pump 7 Air blower part 8 Dehumidification rotor part 9 Mounting base 9a Mounting plate 9b Support leg 9c Space part 10 Water storage tank part 10a Tank 10b Water collection cover 11 Control part 12 Compression Machine 13 Heat sink 13a Heat sink 13b Connecting pipe 14 Expander 15 Heat absorber 15a Heat absorbing fin 15b Connecting pipe 16 Motor 17 Fan 17a Main plate 17b Blade 17c Suction ring 17d Rotating shaft fixing part 18 Casing 18a Inlet port 18b Outlet port 19 Dehumidifying rotor 19 a Moisture absorption part 19b Moisture release part 20 Rotor frame 21 Drive part 22 Heating part 23 First air passage 24 Second air passage 30 Air purifying filter 31 Net 32 Reinforcement part 33 Frame part 34 Downward side frame part 35 Inner protrusion part 36 Outer protrusion part 37 Center protrusion 38 Leeward side frame recess

Claims (3)

A net through which airflow passes,
a lattice-shaped reinforcing portion provided along the surface of the net;
comprising a frame portion connecting a peripheral portion of the net and an end portion of the reinforcing portion;
The reinforcing part and the frame part are injection molded products made of resin material,
The net is fixed to the reinforcing portion and the frame, and the net, the reinforcing portion, and the frame are insert molded products,
The frame portion is
a leeward side frame portion provided along the leeward side surface of the net;
an annular inner protrusion protruding from the inner edge of the leeward side frame portion to the windward side of the net via the net;
an outer protrusion protruding from the leeward side frame part toward the windward side of the net at a predetermined distance outside the inner protrusion part;
The air purifying filter is characterized in that a peripheral end of the net is disposed between the inner protrusion and the outer protrusion. a central protrusion that is located outside the inner protrusion, and on the inner side of the outer protrusion that protrudes from the leeward side frame portion through the net to the windward side of the net;
The central protrusion is connected to the outer protrusion and has a predetermined distance from the inner protrusion,
The dimension of the central protrusion protruding from the leeward side frame is:
The air purifying filter according to claim 1, wherein the size of the outer protrusion is smaller than the size of the outer protrusion that protrudes from the leeward side frame. The air filter according to claim 2 , wherein the leeward side frame portion on the leeward side of the net of the outer protrusion portion and the central protrusion portion has a leeward side frame recessed portion recessed toward the windward side of the net. Clean filter.