JP6930174B2 - Suction unit and air purifier - Google Patents

Description

The present invention relates to a suction unit and an air purifier.

Conventionally, an air purifier has been known in which the deodorizing ability of the deodorizing filter is regenerated by adsorbing the odorous components contained in the air to the deodorizing filter by passing the indoor air through the deodorizing filter and heating the deodorizing filter. There is. Among such air purifiers, there is known an air purifier in which a plate-shaped deodorizing filter is rotatably provided and a heating space portion for heating a part of the deodorizing filter by a heat radiating plate is provided.

Japanese Unexamined Patent Publication No. 2016-49402

In the above-mentioned air purifier, after stopping the rotation of the deodorizing filter with respect to the heating space, a part of the deodorizing filter located in the heating space is heated to a predetermined temperature, so that the deodorizing catalyst of the deodorizing filter has an odor component. Causes the action of decomposing. The deodorizing filter regenerates a part of the adsorption performance of the deodorizing filter by decomposing the odorous component adsorbed on the deodorizing filter by the decomposing action of the heated deodorizing catalyst. In such an air purifier, a part of the deodorizing filter is heated in the heating space, and then the deodorizing filter is rotated to move a part of the next deodorizing filter following the heated part into the heating space. It is stopped and the adsorption performance of the deodorizing filter is repeatedly regenerated.

At this time, a part of the deodorizing filter that has escaped from the inside of the heating space is exposed to the air that passes through the deodorizing filter outside the heating space, so that the temperature of the part that is heated drops sharply, and the deodorizing catalyst The decomposition action is lost. Therefore, in the ventilation space outside the heating space, the deodorizing filter could not decompose the odorous component.

The technique disclosed is made in view of the above, and an object of the present invention is to provide an adsorption unit and an air purifier capable of increasing the efficiency of removing adsorbed substances.

One aspect of the suction unit disclosed in the present application is a filter formed in a plate shape, a heat radiating plate arranged so as to face a part of the filter, and the heat radiating plate is heated to pass through the heat radiating plate. A heater for heating a part of the filter, a driving unit for moving the filter with respect to the heat sink, and a case having a heating space for arranging the heater and the heat sink are provided. On the outside, a decomposition space portion for decomposing the adsorbed substance of the filter is provided adjacent to the downstream side in the moving direction of the filter with respect to the heating space portion. The drive unit moves the filter with respect to the heating space portion so that the decomposition space portion is generated while heating the filter by the heater.

According to one aspect of the adsorption unit disclosed in the present application, the efficiency of removing the adsorbed substance can be increased.

FIG. 1 is a perspective view showing the appearance of the air purifier of the embodiment. FIG. 2 is a plan view showing the air purifier of the embodiment. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1 showing the air purifier of the embodiment. FIG. 4 is a cross-sectional view taken along the line BB in FIG. 1 showing the air purifier of the embodiment. FIG. 5 is a perspective view showing a deodorizing unit of the embodiment. FIG. 6 is an exploded perspective view showing the deodorizing unit of the embodiment. FIG. 7 is a perspective view showing a deodorizing filter portion of the deodorizing unit of the embodiment. FIG. 8 is a cross-sectional view taken along the line CC in FIG. 6 showing the filter regeneration unit of the deodorizing unit of the embodiment. FIG. 9 is an exploded perspective view showing a filter regeneration unit of the deodorizing unit of the embodiment. FIG. 10 is a schematic diagram for explaining the decomposing action of the odor component of the deodorizing filter in the deodorizing unit of the embodiment. FIG. 11 is a graph for explaining the efficiency of decomposing odorous components in the air in the deodorizing unit of the embodiment. FIG. 12 is a schematic view showing a modified example of the decomposition space portion in the deodorizing unit of the embodiment.

Hereinafter, examples of the adsorption unit and the air purifier disclosed in the present application will be described in detail with reference to the drawings. The adsorption unit and the air purifier disclosed in the present application are not limited by the following examples.

[Air purifier configuration]
FIG. 1 is a perspective view showing the appearance of the air purifier of the embodiment. As shown in FIG. 1, the air purifier 1 of one embodiment includes a main body housing 11, a front panel 12, a front panel 13, and a rear panel 14. The main body housing 11 is made of a synthetic resin material and is formed in a substantially rectangular parallelepiped shape. The main body housing 11 includes a top panel 11a, a right side panel 11b, a left side panel 11c, and a bottom portion 11d. The bottom portion 11d forms the lower portion of the main body housing 11, and is placed on the installation surface on which the air purifier 1 is installed. The right side panel 11b and the left side panel 11c are arranged so as to face each other to form a side surface of the main body housing 11, and their lower ends are joined to the bottom portion 11d. The top panel 11a forms the upper part of the main body housing 11, and is joined to the upper end of the right side panel 11b and the upper end of the left side panel 11c. The front panel 12 is arranged on the front surface of the main body housing 11. The front panel 13 is arranged in front of the front panel 12.

An upper surface suction port 13a, a right side suction port 13b, a left side suction port 13c, and a lower suction port 13d are formed between the front panel 13 and the front panel 12. The upper surface suction port 13a is arranged on the upper side of the front panel 13. The right side suction port 13b is arranged on the side of the right side panel 11b of the front panel 13. The left side suction port 13c is arranged on the side of the left side panel 11c of the front panel 13. The lower suction port 13d is arranged on the side of the bottom portion 11d of the front panel 13.

The air purifier 1 further includes an operation unit 15. The operation unit 15 is arranged on the upper surface of the air purifier 1 so as to cover a part of the upper surface suction port 13a. The operation unit 15 has a button and a display unit. The button includes a power button, an operation mode switching button, and the like, and is used when operating the air purifier 1. The display unit displays the operating state of the air purifier 1 and the detection result of a detector such as a dust sensor (not shown).

FIG. 2 is a plan view showing the air purifier of the embodiment. The rear panel 14 is made of a synthetic resin material and is arranged on the back surface opposite to the front surface on which the front panel 12 is arranged, as shown in FIG. An upper surface outlet 14a, a right side outlet 14b, and a left side outlet 14c are formed between the main body housing 11 and the rear panel 14. The top air outlet 14a is arranged on the side of the top panel 11a of the rear panel 14. The right side air outlet 14b is arranged on the side of the right side panel 11b of the rear panel 14. The left side air outlet 14c is arranged on the side of the left side panel 11c of the rear panel 14.

The air purifier 1 sucks air sucked into the main body housing 11 from each of the upper surface suction port 13a, the right side suction port 13b, the left side suction port 13c, and the lower side suction port 13d into the upper surface air outlet 14a and the right side air outlet. Air dust removal treatment, humidification treatment, and deodorization treatment are performed before blowing out from each of 14b and the left side air outlet 14c.

In FIGS. 1 and 1, the front-rear direction (depth direction) of the air purifier 1 is shown as the X direction, the width direction of the air purifier 1 is shown as the Y direction, and the height direction of the air purifier 1 is shown as the Z direction. Further, in the following description, the side on which the front panel 12 of the main body housing 11 is arranged is referred to as the “front side”, and the side on which the rear panel 14 of the main body housing 11 is arranged is referred to as the “back side”.

FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1 showing the air purifier of the embodiment. As shown in FIG. 3, the main body housing 11 has a ventilation passage 10 formed inside. The ventilation passage 10 communicates the upper surface suction port 13a, the right side suction port 13b, the left side suction port 13c, and the lower suction port 13d with the upper surface air outlet 14a, the right side air outlet 14b, and the left side air outlet 14c. ing.

The air purifier 1 further includes a pre-filter 21, a dust collecting unit 22, a deodorizing unit 23 as an adsorption unit, a humidifying unit 24, and a blower 25 as a blower unit. The pre-filter 21, dust collecting unit 22, deodorizing unit 23, humidifying unit 24, and blower 25 are arranged in a ventilation passage 10 inside the main body housing 11.

The pre-filter 21 is formed as, for example, a network structure in which a thread-like PET (polyethylene terephthalate) material is woven. The pre-filter 21 is arranged on the front side of the ventilation passage 10. The pre-filter 21 collects dust contained in the air sucked into the ventilation passage 10 inside the main body housing 11 from the upper surface suction port 13a, the right side suction port 13b, the left side suction port 13c, and the lower suction port 13d. do.

The dust collecting unit 22 is arranged on the back side of the pre-filter 21 in the ventilation passage 10. The main body housing 11 further includes a partition plate 16. The partition plate 16 is arranged on the back side of the front panel 13 and forms a part of the main body housing 11. The dust collector unit 22 has a first electrostatic precipitator 22a and a second electrostatic precipitator 22b. The first electrostatic precipitator 22a and the second electrostatic precipitator 22b are arranged in the vertical direction and supported by the partition plate 16. The first electrostatic precipitator 22a and the second electrostatic precipitator 22b each have a housing, a discharge electrode, and a dust collection electrode (not shown). A discharge electrode and a dust collection electrode are supported inside the housing. The discharge electrode charges fine dust, pollen, etc. not collected by the pre-filter 21 by corona discharge. The dust collecting electrode collects dust, pollen, etc. charged by the discharge electrode. The dust collector unit 22 is formed by forming, for example, a non-woven fabric into a pleated shape by forming a first electrostatic precipitator 22a and a second electrostatic precipitator 22b with a discharge electrode, a dust collector electrode, and a housing. The air resistance is smaller than that of the dust collection filter.

The deodorizing unit 23 is arranged on the back side of the pre-filter 21 in the ventilation passage 10. The humidifying unit 24 is arranged on the back side of the deodorizing unit 23 in the ventilation passage 10. The humidification unit 24 has a humidification filter 24a and a water storage tank 24b. Water is stored in the water storage tank 24b. The humidifying filter 24a is formed in a disk shape, and is arranged so that a part of the humidifying filter 24a is immersed in the water stored in the water storage tank 24b. The humidifying filter 24a is further rotatably supported by a rotating shaft so that a portion immersed in water stored in the water storage tank 24b moves, and is rotated by a motor (not shown). The humidifying unit 24 humidifies the air flowing through the ventilation passage 10 by passing air through the humidifying filter 24a moistened by the water stored in the water storage tank 24b.

The humidifying unit 24 is not limited to the above configuration, and is, for example, like a water wheel that draws water stored in the water storage tank 24b into a plurality of recesses formed on the outer peripheral side of the humidifying filter 24a to moisten the humidifying filter 24a. It may be configured in. In this case, the humidifying filter 24a may be provided so as not to be immersed in the water stored in the water storage tank 24b. Further, the humidifying filter 24a may be provided so as not to rotate. In this case, the humidifying filter 24a may be replaced with another humidifying filter that sucks up the water stored in the water storage tank 24b by the capillary phenomenon.

The blower 25 is arranged on the back side of the humidifying unit 24 in the ventilation passage 10. The blower 25 has a turbofan 25a and a fan motor 25b. The fan motor 25b has a variable rotation speed and rotates the turbofan 25a. The turbofan 25a is made of a synthetic resin material and is connected to the output shaft of the fan motor 25b. By rotating the turbofan 25a, the upper surface suction port 13a, the right side suction port 13b, the left side suction port 13c and the lower suction port 13d, the upper surface outlet 14a, the right side outlet 14b and the left side outlet 14c Let the air flow toward. That is, the blower 25 takes in air into the air purifier 1 from the upper surface suction port 13a, the right side suction port 13b, the left side suction port 13c, and the lower suction port 13d, and passes the air along the ventilation path 10. Let me. The blower 25 further discharges the air that has passed through the ventilation passage 10 to the outside of the air purifier 1 through the upper surface outlet 14a, the right side outlet 14b, and the left side outlet 14c.

The blower 25 is arranged so that the height D at the center of the fan motor 25b coincides with the height of the space between the first electrostatic precipitator 22a and the second electrostatic precipitator 22b of the dust collector unit 22. Since the air flow due to the rotation of the turbofan 25a is small near the center of the fan motor 25b, the air flow in the space near the center of the fan motor 25b in the ventilation passage 10 is small. Air does not pass between the first electrostatic precipitator 22a and the second electrostatic precipitator 22b in the dust collector unit 22. Therefore, the dust collecting unit 22 can remove dust with high efficiency by arranging the first electrostatic precipitator 22a and the second electrostatic precipitator 22b in a space where there is a large air flow.

FIG. 4 is a cross-sectional view taken along the line BB in FIG. 1 showing the air purifier 1 of the embodiment. As shown in FIG. 4, the pre-filter 21 is formed in an arch shape whose center is convex toward the front surface side. Therefore, as compared with the case where the pre-filter 21 is formed flat, the pre-filter 21 has a main body housing 11 from the upper surface suction port 13a, the right side suction port 13b, the left side suction port 13c, and the lower suction port 13d. The area where the air sucked into each of the air passes through the pre-filter 21 is large. As a result, the pre-filter 21 has even more dust from the air sucked into the main body housing 11 from the upper surface suction port 13a, the right side suction port 13b, the left side suction port 13c, and the lower suction port 13d. It is possible to collect.

[Structure of deodorizing unit]
FIG. 5 is a perspective view showing a deodorizing unit of the embodiment. As shown in FIG. 5, the deodorizing unit 23 as the adsorption unit of the embodiment has a deodorizing filter unit 23a, a filter regeneration unit 23f, and a holding unit 23g. The deodorizing filter portion 23a is formed in a disk shape. The filter regenerating portion 23f is formed in a substantially triangular prism shape, and covers a part of both sides of the deodorizing filter portion 23a in the circumferential direction. The holding portion 23g is fixed to the main body housing 11 and supports the deodorizing filter portion 23a and the filter regenerating portion 23f.

FIG. 6 is an exploded perspective view showing the deodorizing unit 23 of the embodiment. As shown in FIG. 6, the holding portion 23g is formed in a substantially square shape by a synthetic resin material, and a circular opening 23gd corresponding to the shape of the deodorizing filter portion 23a is formed in the center. Further, the holding portion 23g corresponds to the shape of the filter reproducing portion 23f above the opening 23gd (a portion that is on the upper side when the holding portion 23g is arranged in the ventilation passage 10. Hereinafter referred to as “upper”). A concave regenerated portion storage portion 23ge is formed.

Further, the deodorizing unit 23 has two rollers 23m, a rotation detection gear 23k, a rotation detection unit 23r, a drive unit 23h, a drive gear 23j, and four pressing members 23z. Each of the two rollers 23 m is made of a synthetic resin material and has a tubular portion 23 mb, an upper flange 23 mc and a lower flange 23 md. The tubular portion 23 mb is formed in a cylindrical shape having a hole of 23 ma. The upper flange 23 mc and the lower flange 23 md are each formed in a disk shape having a diameter larger than that of the tubular portion 23 mb, and project from both ends of the tubular portion 23 mb toward the outer peripheral side. Two first shafts 23ga are formed in the holding portion 23g. The two first shafts 23ga are arranged at both corners below the holding portion 23g (the portion that becomes the lower side when the holding portion 23g is arranged in the ventilation passage 10). The two first shafts 23ga are rotatably supported by the two rollers 23m by being inserted into the holes 23ma of the two rollers 23m, respectively.

The rotation detection gear 23k is made of a synthetic resin material. A second shaft 23 gb is further formed on the holding portion 23 g. The second shaft 23gb is arranged on the left side of the reproduction unit storage unit 23ge (the left side when the deodorizing filter unit 23a is viewed from the front side). The second shaft 23gb rotatably supports the rotation detection gear 23k by inserting the rotation detection gear 23k. The rotation detection unit 23r detects the rotation of the rotation detection gear 23k. For example, a photo interrupter is used as the rotation detection unit 23r. The photo interrupter has a light emitting unit and a light receiving unit, and the light emitting unit and the light receiving unit are arranged so as to face each other with the detection target interposed therebetween. The photo interrupter can detect the presence / absence and position of a detection target by detecting the light emitted from the light emitting unit with the light receiving unit.

The drive gear 23j is made of a synthetic resin material. The drive unit 23h has, for example, a stepping motor, and the drive gear 23j is attached to the output shaft of the stepping motor. The holding portion 23g is further formed with a driving portion fixing portion 23gc. The drive unit fixing unit 23 gc is arranged on the right side of the regenerator unit storage unit 23ge (the right side when the deodorizing filter unit 23a is viewed from the front side) and supports the drive unit 23h. The drive unit 23h rotates the drive gear 23j.

The four pressing members 23z are formed of a synthetic resin material as a substantially pentagonal plate material, and are formed in a shape that can be fitted into the holding portion 23g. The pressing member 23z is fitted into the holding portion 23g after the two rollers 23m, the rotation detection gear 23k, the driving portion 23h, and the driving gear 23j are mounted on the holding portion 23g. The pressing member 23z presses the two rollers 23m, the rotation detection gear 23k, the driving portion 23h, and the driving gear 23j by being fitted into the holding portion 23g, and supports the holding portion 23z so as not to come off from the holding portion 23g. ..

FIG. 7 is a perspective view showing a deodorizing filter unit 23a of the deodorizing unit of the embodiment. As shown in FIG. 7, the deodorizing filter unit 23a includes a deodorizing filter 23aa, an outer peripheral filter cover 23ac, and an inner peripheral filter cover 23ae.

The deodorizing filter 23aa is formed in a disk shape, and a through hole 23aao is formed in the center. The deodorizing filter 23aa is formed so that air passes in the thickness direction of the deodorizing filter 23aa. The deodorizing filter 23aa contains an adsorbent that adsorbs an odorous component as an adsorbent and a deodorizing catalyst that has an action of decomposing the odorous component. The deodorizing filter 23aa of the present embodiment separately contains an adsorbent and a deodorizing catalyst, but the present invention is not limited to this. Therefore, for example, the deodorizing filter 23aa may contain a catalyst having adsorption performance (adsorption deodorizing catalyst). The deodorizing filter 23aa adsorbs the odorous component from the passing air and heats it by the PTC heater 23b described later to decompose the adsorbed odorous component. For example, the deodorizing filter 23aa has a base material (not shown) and a catalyst layer formed on the base material. The base material is formed of a plate material such as aluminum, and is formed in a porous structure exemplified by a honeycomb structure. The catalyst layer is formed by a catalyst and covers the surface of the base material. The catalyst adsorbs an odorous component from the air flowing in the vicinity of the catalyst layer and heats the odorous component to decompose the adsorbed odorous component. The air resistance of the deodorizing filter 23aa is small because it is formed in a porous structure and because the filter regenerating portion 23f covers only a part of the deodorizing filter 23aa and does not cover most of the deodorizing filter 23aa.

The outer peripheral filter cover 23ac is formed in a substantially annular shape, and is arranged along the outer peripheral portion of the deodorizing filter 23aa. The outer peripheral filter cover 23ac covers the outer peripheral edge of the deodorizing filter 23aa and protects the end surface of the outer peripheral edge of the deodorizing filter 23aa. The inner peripheral filter cover 23ae is formed in a substantially annular shape and is arranged inside the through hole 23aa of the deodorizing filter 23aa, and covers the inner peripheral edge of the deodorizing filter 23aa to protect the end face of the inner peripheral portion. ing. A through hole 23ad is formed in the inner peripheral filter cover 23ae.

Further, on the outer peripheral filter cover 23ac, first convex portions 23acp protruding in the thickness direction of the deodorizing filter 23aa are integrally formed on both sides of the deodorizing filter 23aa in the thickness direction (X direction). Further, similarly to the outer peripheral filter cover 23ac, the inner peripheral filter cover 23ae has second convex portions 23aep protruding in the thickness direction of the deodorizing filter 23aa on both sides in the thickness direction (X direction) of the deodorizing filter 23aa. It is formed integrally. The distance between the heat radiating plate 23c and the deodorizing filter 23aa is properly regulated by the first convex portion 23acp and the second convex portion 23aep in the thickness direction of the deodorizing filter 23aa.

[Structure of filter playback unit]
FIG. 8 shows a CC cross section in FIG. 6 showing the filter regeneration unit 23f of the deodorizing unit 23 of the embodiment. As shown in FIG. 8, the filter regeneration unit 23f includes a case 23e, a heat radiating plate 23c, and a PTC (Positive Temperature Coafficient) heater 23b. The case 23e is formed in a box shape having a substantially triangular prism shape. The case 23e covers a part of the deodorizing filter portion 23a in the circumferential direction. The case 23e has a pair of front side case members 23ea and a back side case member 23eb to be combined. The front side case member 23ea forms a front side portion of the case 23e. The back side case member 23eb forms a back side portion of the case 23e. A space is formed inside the case 23e composed of the front side case member 23ea and the back side case member 23eb. This space becomes, for example, a heating space portion S1 in which the PTC heater 23b is arranged, as will be described later.

The heat radiating plate 23c has a set of front side heat radiating plates 23ca and a back side heat radiating plate 23cc arranged so as to face each other. The front heat dissipation plate 23ca is supported inside the case 23e. The front heat dissipation plate 23ca faces a part of the deodorizing filter portion 23a in the circumferential direction. In the deodorizing filter portion 23a, a part of the deodorizing filter portion 23a is covered from the front side by the front side heat radiating plate 23ca. Similarly, the back side heat radiating plate 23cc is supported inside the case 23e. The back side heat radiating plate 23cc faces a part of the deodorizing filter portion 23a in the circumferential direction. In the deodorizing filter portion 23a, a part of the deodorizing filter portion 23a is covered from the back side by the heat radiating plate 23cc on the back side.

The PTC heater 23b has a property of generating heat when energized and the resistance value increases as the temperature rises, and the amount of heat generated is self-controlled by utilizing this property. The PTC heater 23b is formed in a rectangular parallelepiped shape and is provided inside the case 23e. The PTC heater 23b is arranged on the outer peripheral side of the deodorizing filter portion 23a, and is sandwiched and supported between the front side heat radiating plate 23ca and the back side heat radiating plate 23cc. The PTC heater 23b is abutted against the positioning projection 23cf (FIG. 9) of the back side heat radiating plate 23cc, which will be described later. Further, the PTC heater 23b is abutted against the support portion formed on the back side case member 23eb, so that the movement of the PTC heater 23b in the Z direction is restricted.

FIG. 9 is an exploded perspective view showing the filter regeneration unit 23f of the deodorizing unit of the embodiment. The front heat sink 23ca and the back heat sink 23cc are formed of a material having good thermal conductivity, such as an aluminum material or an aluminum alloy material. As shown in FIG. 9, the front side heat radiating plate 23ca is arranged on the front side of the deodorizing filter portion 23a. The outer shape of the front side heat radiating plate 23ca is formed in a substantially triangular shape in which the width dimension in the left-right direction (circumferential direction of the deodorizing filter portion 23a) increases from the through hole 23ad of the deodorizing filter portion 23a toward the outer peripheral side of the deodorizing filter portion 23a. Has been done. The front heat dissipation plate 23ca has a filter facing surface 23caa and a cover facing surface 23ca. The filter facing surface 23caa is one surface of the front side heat radiating plate 23ca, and the cover facing surface 23ca is the other surface of the front side heat radiating plate 23ca. The front side heat radiating plate 23ca is formed with a through hole 23ca corresponding to the through hole 23ad of the deodorizing filter portion 23a. The shaft portion 23xa of the back side case member 23eb, which will be described later, is inserted into the through hole 23cab.

The back side heat radiating plate 23cc is arranged so as to face the back side of the deodorizing filter portion 23a. The outer shape of the heat radiating plate 23cc on the back side is formed in a substantially triangular shape in which the width dimension in the left-right direction (circumferential direction of the deodorizing filter portion 23a) increases toward the outer peripheral side from the through hole 23ad of the deodorizing filter portion 23a. The heat radiating plate 23cc on the back side has a filter facing surface 23cba and a cover facing surface 23cbb. The filter facing surface 23cba is one surface of the back surface side heat radiating plate 23cc, and the cover facing surface 23cbb is the other surface of the filter facing surface 23cba.

As shown in FIGS. 8 and 9, a positioning protrusion 23cf for positioning the PTC heater 23b is provided on the filter facing surface 23cca of the back side heat radiating plate 23cc, and the positioning protrusion 23cf hits the outer peripheral surface of the PTC heater 23b. Therefore, the position of the PTC heater 23b with respect to one side in the Z direction (the inner peripheral side of the deodorizing filter portion 23a) is regulated. Further, similarly to the back side heat radiating plate 23cc, the filter facing surface 23caa of the front side heat radiating plate 23ca is also provided with a positioning protrusion 23cg for positioning the PTC heater 23b (see FIG. 8). A through hole 23cbg through which the shaft portion 23xa of the back side case member 23eb, which will be described later, is inserted is formed at the inner peripheral side end portion of the back side heat radiating plate 23cc.

The PTC heater 23b has a front side heat radiating plate 23ca and a back side heat radiating plate on the outer peripheral side edge portion of the deodorizing filter portion 23a on the filter facing surface 23caa of the front side heat radiating plate 23ca and the filter facing surface 23cba of the back side heat radiating plate 23cc. It is sandwiched between 23 cc and supported. The front side heat radiating plate 23ca is arranged so that the filter facing surface 23ca faces the deodorizing filter portion 23a. The back side heat radiating plate 23cc is arranged so that the filter facing surface 23cba faces the deodorizing filter portion 23a. A heat conductive grease or the like may be applied between the PTC heater 23b and the front side heat sink 23ca and the back side heat sink 23cc in order to enhance the heat conductivity.

For convenience of explanation, the back side case member 23eb will be described first. The back side case member 23eb is made of a synthetic resin material. As shown in FIG. 9, the outer shape of the back side case member 23eb is formed to be one size larger than the outer shape of the back side heat radiating plate 23cc. The back side case member 23eb has a heating space portion S1b (corresponding to the back side of the heating space portion S1) inside the case member 23eb. For example, a PTC heater 23b and a back surface side heat radiating plate 23cc are arranged in the heating space portion S1b. The heating space portion S1b functions as a space for heating the deodorizing filter 23aa.

The back side case member 23eb is formed in a bottomed box shape, and the back side case member 23eb is a first side portion as an outer peripheral wall formed along the outer periphery of the bottom portion 23eda and the back side case member 23eb. It has a 23edb, a second side portion 23edc, a third side portion 23edd, and a fourth side portion 23ede. The bottom 23eda is formed in the shape of a substantially triangular plate. The first side portion 23edb, the second side portion 23edc, the third side portion 23edd, and the fourth side portion 23ede are each formed so as to rise from the outer peripheral portion of the bottom portion 23eda. The first side portion 23edb is formed in a portion of the outer peripheral portion of the bottom portion 23eda that is arranged on the through hole 23ad side of the deodorizing filter portion 23a. The fourth side portion 23ede is formed on a portion of the outer peripheral portion of the bottom portion 23eda that is arranged on the outer peripheral side of the deodorizing filter portion 23a. The second side portion 23edc and the third side portion 23edd are formed on both sides of the outer peripheral portion of the bottom portion 23eda in the Y direction. The space surrounded by the bottom portion 23eda, the first side portion 23edb, the second side portion 23edc, the third side portion 23edd, and the fourth side portion 23ede is the back side internal space.

A shaft portion 23xa that is inserted through a through hole 23ad of the deodorizing filter portion 23a and rotatably supports the deodorizing filter portion 23a is formed in the bottom portion 23eda of the back side case member 23eb. The shaft portion 23xa has a through hole 23xa into which a screw 23t or the like as a coupling member is screwed. Further, on both sides of the bottom portion 23eda of the back side case member 23eb in the Y direction, a boss having through holes into which screws 23t or the like as a connecting member for integrally fixing the front side case member 23ea and the back side case member 23eb are screwed. 23xb is formed respectively.

As shown in FIGS. 8 and 9, the front side case member 23ea is made of a synthetic resin material like the back side case member 23eb. The outer shape of the front side case member 23ea is formed to be one size larger than the outer shape of the front side heat radiating plate 23ca. The front side case member 23ea has a heating space portion S1a (corresponding to the front side of the heating space portion S1) inside the case member 23ea. For example, a PTC heater 23b and a front heat sink 23ca are arranged in the heating space portion S1a. The heating space portion S1a functions as a space for heating the deodorizing filter 23aa via the front heat sink 23ca.

The front side case member 23ea is formed in a bottomed box shape, and the bottom portion 23ec, the first side portion 23ecb and the second side portion 23ecc as outer peripheral walls formed along the outer circumference of the front side case member 23ea. , A third side portion 23 ecd and a fourth side portion 23 ec. The bottom 23eca is formed in the shape of a substantially triangular plate. The first side portion 23ecb, the second side portion 23ecc, the third side portion 23ecd, and the fourth side portion 23ece are each formed so as to rise from the outer peripheral portion of the bottom portion 23eca. The first side portion 23ecb is formed in a portion of the outer peripheral portion of the bottom portion 23eca that is arranged on the through hole 23ad side of the deodorizing filter portion 23a. The fourth side portion 23ece is formed on a portion of the outer peripheral portion of the bottom portion 23eca that is arranged on the outer peripheral side of the deodorizing filter portion 23a. The second side portion 23ec and the third side portion 23ecd are formed on both sides of the outer peripheral portion of the bottom portion 23eca in the Y direction. The space surrounded by the bottom portion 23 ec, the first side portion 23 ecb, the second side portion 23 ec, the third side portion 23 ecd, and the fourth side portion 23 ec is the front side internal space.

A shaft seat portion 23xc is formed on the bottom portion 23eca of the front side case member 23ea at a position facing the through hole 23ad of the deodorizing filter portion 23a. The tip of the shaft portion 23xa of the back side case member 23eb is abutted against the shaft seat portion 23xc. The shaft seat portion 23xc has a through hole into which the screw 23t is screwed.

By combining the front side case member 23ea and the back side case member 23eb, the case 23e in which the PTC heater 23b, the front side heat radiating plate 23ca, the back side heat radiating plate 23cc, and a part of the deodorizing filter portion 23a are housed inside can be obtained. It is composed. The shaft portion 23xa of the back side case member 23eb is inserted into the through hole 23ad of the deodorizing filter portion 23a, so that the deodorizing filter portion 23a is rotatably supported by the shaft portion 23xa. Further, as shown in FIGS. 8 and 9, the shaft portion 23xa is passed through the cylindrical shaft member 23xe, and is deodorized via the shaft member 23xe passed through the through hole 23ad of the deodorizing filter portion 23a. It supports the filter portion 23a. The shaft member 23xe is formed of, for example, a metal material having thermal conductivity such as stainless steel.

In the deodorizing unit 23 assembled as described above, as shown in FIG. 6, the filter regeneration unit 23f is housed in the regeneration unit storage unit 23ge of the holding unit 23g. Further, in the deodorizing filter portion 23a, the gear portion 38 of the outer peripheral filter cover 23ac is meshed with the drive gear 23j and is rotated by the drive portion 23h. Further, in the deodorizing filter unit 23a, the gear portion 38 of the outer peripheral filter cover 23ac is meshed with the rotation detection gear 23k, and the rotation is detected by the rotation detection unit 23r.

The deodorizing filter unit 23a configured as described above will be described below with a characteristic configuration of this embodiment. FIG. 10 is a schematic diagram for explaining the decomposing action of the odor component of the deodorizing filter 23aa in the deodorizing unit 23 of the embodiment.

As shown in FIG. 10, in the deodorizing unit 23 of the embodiment, the deodorizing filter 23aa is rotated in the R direction by the driving unit 23h while heating the deodorizing filter 23aa in the heating space portion S1 in the case 23e. At this time, the drive unit 23h is at a temperature at which the decomposition action of the adsorbed substance on the deodorizing catalyst of the deodorizing filter 23aa increases to a level required by the deodorizing catalyst of the deodorizing filter 23aa while a part of the deodorizing filter 23aa passes through the heating space portion S1. The deodorizing filter 23aa is moved so as to be heated to a predetermined temperature). Therefore, on the downstream side of the heating space portion S1 with respect to the R direction, which is the rotation direction of the deodorizing filter 23aa, for example, a region S2 having a temperature zone lower than a predetermined temperature and higher than the air to be processed (hereinafter, “decomposition space portion”). S2 ”) is generated adjacent to the heating space portion S1.

In order to properly generate the decomposition space portion S2, for example, the drive unit 23h keeps rotating the deodorizing filter 23aa at a predetermined speed. As a result, the deodorizing filter 23aa heated in the heating space portion S1 continues to be sequentially supplied to the ventilation passage 10. As a result, in the deodorizing filter 23aa, a deodorizing catalyst having a temperature lower than a predetermined temperature and higher than the air to be treated is maintained in the decomposition space portion S2 on the downstream side of the heating space portion S1. In other words, in the drive unit 23h, the stepping motor is driven and controlled by a drive control circuit (not shown) as a control unit, so that the temperature of a part of the deodorizing filter 23aa heated in the heating space portion S1 is set. The deodorizing filter 23aa is rotated so that the temperature is maintained above a predetermined temperature in the decomposition space portion S2. Further, in the deodorizing unit 23 of the embodiment, when a part of the deodorizing filter 23aa is heated by the PTC heater 23b in the heating space portion S1, the blower 25 blows air to the deodorizing filter 23aa.

Therefore, in the decomposition space portion S2 adjacent to the heating space portion S1, the decomposition action of the deodorizing catalyst of the deodorizing filter 23aa is maintained, so that the decomposition of the odorous components adsorbed on the deodorizing filter 23aa continues and the deodorizing filter is deodorized. The odorous components in the air passing through 23aa are also decomposed. In this way, in the decomposition space portion S2, the odor component adsorbed on the deodorizing filter 23aa and the odor component in the air passing through the deodorizing filter 23aa are decomposed, respectively, and the deodorizing filter is formed in the ventilation passage 10. The amount of odorous components removed by 23aa increases.

Further, in the circumferential direction of the deodorizing filter 23aa rotating in the R direction, the temperature of the deodorizing filter 23aa is, for example, the same temperature as the air to be processed between the downstream side of the decomposition space portion S2 and the upstream side of the heating space portion S1. There is a region S3 (hereinafter, referred to as “normal temperature space portion S3”) that becomes (hereinafter referred to as “normal temperature”). In the room temperature space portion S3, the temperature of the deodorizing filter 23aa becomes normal temperature due to the air passing through the deodorizing filter 23aa. Therefore, in the room temperature space portion S3, the decomposing action of the odor component is reduced, and the deodorizing filter 23aa mainly adsorbs the odor component of the air to be treated.

In this embodiment, when the temperature of the deodorizing catalyst of the deodorizing filter 23aa becomes 80 ° C. or higher, which is a predetermined temperature, with respect to the size (angle) of the heating space portion S1 and the decomposition space portion S2 with respect to the circumferential direction of the deodorizing filter 23aa. The level of decomposition action required for the deodorizing catalyst was assumed to occur, and the heating time required to heat the deodorizing filter 23aa to 80 ° C. was calculated as about 30 seconds. When a part of the deodorizing filter 23aa is heated to a predetermined temperature in the heating space S1 and then exits from the heating space S1, the temperature drops to around room temperature in 1 minute.

Based on this, when the angle θ1 formed by the heating space portion S1 around the center O1 (around the shaft portion 23xa) is set to 36 °, the angle θ1 = 36 ° of the heating space portion S1 is passed over 30 seconds. The rotation speed of the stepping motor required for this is 160 [PPS]. Then, when the stepping motor is rotated at 160 [PPS], the angle at which the deodorizing filter 23aa rotates in 1 minute is 160 [PPS] × 60 seconds = 9600 pulses ≈72 °. Therefore, in this embodiment, the angle θ2 formed by the disassembled space portion S2 around the center O1 is set to about 72 °. Therefore, the ratio of the heating space portion S1, the decomposition space portion S2, and the room temperature space portion S3 in the circumferential direction of the deodorizing filter 23aa is set to 36 °: 72 °: 252 ° = 1: 2: 7.

FIG. 11 shows the measurement results regarding the cleaning ability of the deodorizing unit 23 of the example. FIG. 11 is a graph for explaining the efficiency with which the deodorizing unit 23 of the embodiment decomposes the odorous component (formaldehyde) in the air. In FIG. 11, the vertical axis represents the concentration [ppm] of formaldehyde as an odor component, and the horizontal axis represents the time [minutes]. In the example, the operation of rotating the deodorizing filter 23aa while heating the deodorizing filter 23aa in the heating space portion S1 was performed as described above. In the comparative example, the rotation of the deodorizing filter 23aa was stopped when the deodorizing filter 23aa was heated in the heating space S1, and the deodorizing filter 23aa was rotated after the deodorizing filter 23aa was heated in the heating space S1. .. In FIG. 11, an embodiment is shown by a solid line, and a comparative example is shown by a broken line.

As shown in FIG. 11, in the examples, the concentration of formaldehyde was suppressed to a low level immediately after the start of operation of the air purifier 1 and the efficiency of reducing the concentration of formaldehyde was improved as compared with the comparative example. Further, according to the examples, the concentration of formaldehyde after 60 minutes from the start of operation was reduced to 1/4 or less of the concentration in the comparative example. The result of promoting the decomposition of formaldehyde in the examples in this way is expressed by CADR (Clean Air Delivery Rate) as follows. CADR is defined as the amount of clean air that can be supplied per hour (m ³ / h). When the air volume is 426 [m ³ / h], the CADR [m ³ / h] of ^{formaldehyde is 24 [m 3} / h] in the ^{example as compared with 16 [m 3} / h] in the comparative example. It becomes. Therefore, the CADR of the example is 50% higher than the CADR of the comparative example.

Note that this embodiment is not limited to the rotational operation of continuously rotating the deodorizing filter 23aa while heating a part of the deodorizing filter 23aa in the heating space S1, but the deodorizing filter 23aa in the heating space S1. The deodorizing filter 23aa may be rotated intermittently while heating a part of the filter. The drive unit 23h is a part of the deodorizing filter 23aa by, for example, intermittently rotating the deodorizing filter 23aa at an angle smaller than the angle θ formed by the heating space portion S1 around the center O1 (around the shaft portion 23xa). It becomes possible to easily secure a time for staying in the heating space portion S1, that is, a heating time for a predetermined time. Further, by intermittently rotating the deodorizing filter 23aa, the size (angle) of the heating space portion S1 with respect to the circumferential direction of the deodorizing filter 23aa can be reduced.

If necessary, the decomposition space portion S2 may be provided with another heating portion for heating the deodorizing filter 23aa. By heating the deodorizing filter 23aa using another heating portion in the decomposition space portion S2, the temperature of the deodorizing filter 23aa can be easily maintained at a predetermined temperature at which the decomposition action of the deodorizing catalyst can be obtained.

FIG. 12 is a schematic view showing a modified example of the decomposition space portion S2 in the deodorizing unit of the embodiment. As shown in FIG. 12, an auxiliary heater and auxiliary heat radiating plates 32a and 32b as auxiliary heating portions are provided in the decomposition space portion S2. The disassembly space portion S2 has PTC auxiliary heaters 31a and 31b as auxiliary heaters, for example. It also has a set of auxiliary heat sinks 32a, 32b that are heated by the PTC auxiliary heaters 31a, 31b. A set of auxiliary heat radiating plates 32a and 32b are arranged so as to face both sides of the deodorizing filter 23aa in the thickness direction. The PTC auxiliary heaters 31a and 31b are arranged on the outer peripheral side of the deodorizing filter 23aa along the outer peripheral side of the deodorizing filter 23aa, and are sandwiched between a set of auxiliary heat radiating plates 32a and 32b. The auxiliary heat radiating plates 32a and 32b are formed in a fan shape corresponding to the size (angle) of the deodorizing filter 23aa in the decomposition space S2 with respect to the circumferential direction, and are punched metal or wire mesh having a plurality of ventilation holes 33. Is used. Since the auxiliary heat radiating plates 32a and 32b have a plurality of ventilation holes 33, the air sent from the blower 25 can smoothly pass through the deodorizing filter 23aa.

Further, in the disassembled space portion S2 of the above-described modified example, the deodorizing filter 23aa was directly heated by the heat of the PTC auxiliary heaters 31a and 31b via the auxiliary heat sinks 32a and 32b, but the deodorizing was performed by the heat of the auxiliary heater. The filter 23aa may be indirectly heated. Although not shown, this configuration includes, for example, an auxiliary heater and a heat radiating member heated by the auxiliary heater. The heat radiating member is arranged between the blower 25 that blows air to the deodorizing filter 23aa and the deodorizing filter 23aa, for example, at a position facing the deodorizing filter 23aa in the decomposition space S2. The heat radiating member has a plurality of heat radiating fins, and the air sent from the blower 25 is heated by the heat radiating fins to become hot air, and the hot air passes through the deodorizing filter 23aa to indirectly pass the deodorizing filter 23aa through the hot air. Heat to. Further, although the auxiliary heater is provided in the above-described modified example, the auxiliary heater may not be provided. In this case, for example, the PTC heater 23b in the heating space portion S1 may be used as the heat source for the auxiliary heat sinks 32a and 32b.

Further, in the configuration of heating using the auxiliary heater in the decomposition space portion S2, the circumferential direction of the deodorizing filter 23aa depends on the rotation speed of the deodorizing filter 23aa, the predetermined temperature at which the deodorizing catalyst of the deodorizing filter 23aa is decomposed, and the like. The angle of the decomposition space portion S2 with respect to the relative can be arbitrarily adjusted.

In the above-described embodiment, the decomposition space portion S2 is provided on the downstream side of the case 23e with respect to the rotation direction of the deodorizing filter 23aa, that is, outside the case 23e, but the decomposition space portion S2 is provided inside the case 23e. May be good. In the case of this configuration, for example, the case 23e is extended so as to cover the decomposition space portion S2, and in order to ensure air permeability to the deodorizing filter 23aa in the region corresponding to the decomposition space portion S2 in the case 23e. Vents may be provided. Auxiliary heat radiating plates 32a and 32b may be integrally formed on a part of the case 23e by punching metal, wire mesh, or the like. Further, a partition wall for partitioning the heating space portion S1 and the decomposition space portion S2 may be provided in the case 23e.

[Operation of air purifier]
The air purifier 1 starts operation when the user operates the operation unit 15. When the air purifier 1 starts operation, the blower 25 is driven, the first electrostatic precipitator 22a and the second electrostatic precipitator 22b of the dust collecting unit 22 are energized, and the humidifying filter 24a of the humidifying unit 24 rotates. Start. In the air purifier 1, when the blower 25 is driven, air is sucked into the main body housing 11 from the upper surface suction port 13a, the right side suction port 13b, the left side suction port 13c, and the lower suction port 13d. ..

The air sucked into the main body housing 11 is from the upper surface suction port 13a, the right side suction port 13b, the left side suction port 13c and the lower suction port 13d, the upper surface outlet 14a, the right side outlet 14b and the left side surface. It flows through the ventilation passage 10 toward the air outlet 14c. First, dust is collected by the pre-filter 21 in the air flowing through the ventilation passage 10. As for the air in which dust is collected by the pre-filter 21, fine dust, pollen, and the like that are not collected by the pre-filter 21 are collected by the dust collection unit 22. A part of the air collected by the dust collecting unit 22 is supplied to the deodorizing unit 23, and the rest is supplied to the humidifying unit 24.

The air supplied to the deodorizing unit 23 is supplied to the ventilation surface not covered by the filter regenerating portion 23f in the deodorizing filter 23aa through the opening 23gd of the holding portion 23g. The air supplied to the ventilation surface of the deodorizing filter 23aa is deodorized by removing the odor component by passing through the deodorizing filter 23aa. At this time, in the deodorizing filter 23aa of the deodorizing unit 23, the air supplied to the deodorizing unit 23 is removed by the pre-filter 21 and the dust collecting unit 22 in advance, so that dust, pollen and the like are removed. Prevents clogging.

A part of the air deodorized by the deodorizing unit 23 is supplied to the humidifying unit 24, and the rest is supplied to the blower 25. The air supplied to the humidifying unit 24 is humidified by the humidifying unit 24. The air humidified by the humidifying unit 24 is supplied to the blower 25. The air supplied to the blower 25 is blown out of the air purifier 1 from the upper surface outlet 14a, the right side outlet 14b, and the left side outlet 14c.

The air purifier 1 continuously energizes the PTC heater 23b and drives the drive unit 23h during operation. At this time, for example, the deodorizing filter unit 23a is continuously rotated so as to rotate once in a predetermined time, or the deodorizing filter unit 23a is intermittently rotated so as to rotate by a predetermined angle at predetermined time intervals. The air purifier 1 regenerates the deodorizing ability of the portion covered by the filter regeneration unit 23f in the circumferential direction of the deodorizing filter 23aa by rotating the deodorizing filter unit 23a. That is, the air purifier 1 regenerates the deodorizing ability at the position covered by the filter regenerating portion 23f of the deodorizing filter 23aa, and deodorizes the air passing through the portion not covered by the filter regenerating portion 23f of the deodorizing filter 23aa. .. Further, in this embodiment, by passing air through the deodorizing filter 23aa while rotating the deodorizing filter 23aa, the deodorizing filter 23aa is maintained in the decomposition space S2 while maintaining the regenerating action of the deodorizing ability of the deodorizing filter 23aa. Decomposes odorous components in the air that passes through.

As described above, the deodorizing unit 23 of the embodiment is adjacent to the outside of the case 23e and adjacent to the downstream side in the moving direction of the deodorizing filter 23aa with respect to the heating space S1, and decomposes the adsorbed substance of the deodorizing filter 23aa. Is provided. As a result, the odorous components adsorbed on the deodorizing filter 23aa continue to be decomposed, and the odorous components in the air passing through the deodorizing filter 23aa are also decomposed. Therefore, the adsorptivity of the odor component to the deodorizing filter 23aa can be enhanced. As a result, the purification performance of the odor component can be improved.

Further, the drive unit 23h included in the deodorizing unit 23 of the embodiment moves the deodorizing filter 23aa with respect to the heating space portion S1 when the deodorizing filter 23aa is heated by the PTC heater 23b. As a result, the decomposition space portion S2 can be appropriately provided on the downstream side of the heating space portion S1 in the moving direction of the deodorizing filter 23aa. At this time, the deodorizing filter 23aa may be continuously or intermittently moved with respect to the heating space portion S1.

Further, the drive unit 23h of the deodorizing unit 23 of the embodiment reaches a predetermined temperature at which the deodorizing catalyst of the deodorizing filter 23aa decomposes the adsorbed substance while a part of the deodorizing filter 23aa passes through the heating space S1. The deodorizing filter 23aa is moved so as to be heated. As a result, the decomposition space portion S2 can be appropriately provided on the downstream side of the heating space portion S1 in the moving direction of the deodorizing filter 23aa.

Further, in the decomposition space portion S2 of the deodorizing unit 23 of the embodiment, for example, PTC auxiliary heaters 31a and 31b and auxiliary heat sinks 32a and 32b are arranged as auxiliary heating portions for heating a part of the deodorizing filter 23aa. .. Thereby, the temperature of the deodorizing filter 23aa can be easily maintained in the decomposition space portion S2 to be equal to or higher than the predetermined temperature at which the decomposition action of the odorous component occurs.

Further, the deodorizing unit 23 of the embodiment includes a blower 25 that blows air to the deodorizing filter 23aa when the deodorizing filter 23aa is heated by the PTC heater 23b. As a result, the odorous component in the air passing through the deodorizing filter 23aa can be decomposed in the decomposition space portion S2, so that the purification performance of the odorous component can be improved.

1 Air purifier 23 Deodorizing unit (adsorption unit)
23a Deodorizing filter section 23a Deodorizing filter (filter)
23ac outer peripheral filter cover (cover)
23b PTC heater (heater)
23c Heat dissipation plate 23h Drive unit 25 Blower (blower unit)
S1 (S1a, S1b) Heating space part S2 Disassembly space part 31a, 31b PTC auxiliary heater (auxiliary heating part)
32a, 32b Auxiliary heat dissipation plate 33 Vent

Claims (5)

A plate-shaped filter and
A heat sink arranged to face a part of the filter and
A heater that heats a part of the filter through the heat sink by heating the heat sink.
A drive unit that moves the filter with respect to the heat radiating plate,
A case having a heating space in which the heater and the heat radiating plate are arranged is provided.
The outside of the case, said adjacent on the downstream side in the moving direction of the filter to the heating space, decomposing space to decompose the adsorbent material of the filter is provided, et al is,
The drive unit is an adsorption unit that heats the filter by the heater and moves the filter with respect to the heating space so that the decomposition space is generated. The driving unit moves the filter so that the filter is heated to a predetermined temperature at which a decomposition action of an adsorbed substance occurs while a part of the filter passes through the heating space.
The adsorption unit according to claim 1. In the decomposition space portion, an auxiliary heating portion having an auxiliary heater for heating a part of the filter is arranged.
The adsorption unit according to claim 1 or 2. The adsorption unit according to any one of claims 1 to 3 is provided.
The filter adsorbs the odorous component contained in the air when the air passes through it, and decomposes the odorous component when heated.
Air cleaner. A blower unit that blows air to the filter when the filter is heated by the heater of the suction unit is further provided.
The air purifier according to claim 4.

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