JP6930156B2 - 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. 2016-43105 Japanese Unexamined Patent Publication No. 10-277365

By the way, the heating space portion of the air purifier as described above is exposed adjacent to the outside air (air to be processed passing through the deodorizing filter). Therefore, it takes time for the heating space to heat the deodorizing filter to a predetermined temperature at which the deodorizing ability is regenerated. Further, since the deodorizing filter heated in the heating space is exposed to the outside air immediately after passing through the heating space, the temperature of the deodorizing filter tends to decrease, which causes a decrease in the regeneration efficiency of the deodorizing ability of the deodorizing filter. There is.

The disclosed technique has been made in view of at least one of the above problems, and an object of the present invention is to provide an adsorption unit and an air purifier capable of increasing the regeneration efficiency of the deodorizing ability of the filter.

One aspect of the adsorption unit disclosed in the present application is a filter formed in a plate shape, a heat sink arranged to face a part of the filter, and the heat sink by heating the heat sink through the heat sink. It includes a heater that heats a part of the filter, a drive unit that moves the filter with respect to the heat sink, and a case that covers the heat sink. The internal space of the case includes a heating space portion in which the heater is arranged, a preheating space portion provided on the entry side where the filter enters the heating space portion and warms the filter without arranging the heater. The heating space portion is provided on the exit side where the filter exits from the heating space portion to keep the filter warm without arranging the heater, and the heating space portion and the preheating space portion are separated from each other. It has a partition wall that separates the heat insulating space and the heat insulating space. The preheating space portion and the heat insulating space portion are formed as a heat insulating space along the outer periphery of the case, and when the case is viewed from the thickness direction of the filter, the outer peripheral wall formed along the outer periphery of the case. Is formed over the entire circumference of the case.

According to one aspect of the adsorption unit disclosed in the present application, the regeneration efficiency of the deodorizing ability of the filter can be enhanced.

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 perspective view showing the front side case member of the filter regeneration unit in the embodiment from the inside. FIG. 11 is a perspective view showing the back side case member of the filter regeneration unit in the embodiment from the inside. FIG. 12 is a plan view for explaining the heating space portion, the preheating space portion, and the heat retaining space portion of the back side case member in the embodiment. FIG. 13 is a plan view showing a state in which the back side heat radiating plate is attached to the heating space portion of the back side case member in the embodiment. FIG. 14 is a schematic diagram for explaining the concept of the preheating space portion and the heat retaining space portion in the embodiment. FIG. 15 is a schematic diagram for explaining the actions of the preheating space portion and the heat retaining space portion of the case in the embodiment. FIG. 16 is a graph schematically showing a heated state of the deodorizing filter in the example.

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. 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 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, hereinafter referred to as "lower"). 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 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, heats the catalyst, and decomposes 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 portion. 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 (hereinafter referred to as "internal space") has, for example, a first space portion in which the PTC heater 23b is arranged and a second space portion in which the PTC heater 23b is not arranged, as will be described later. For example, as will be described later, the heating space portion S1 is provided as the first space portion. Further, as the second space portion, there is a preheating space portion S2 that preheats the deodorizing filter 23aa, and a heat retaining space portion S3 that keeps the deodorizing filter 23aa warm. Further, this internal space has inner peripheral walls 23pa and 23pb that separate the heating space portion S1 and the preheating space portion S2 and the heating space portion S1 and the heat retaining space portion S3.

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 regulation surface 23sab (FIG. 11) of the first rib 23sa of the first support portion 23s1 of the back side case member 23eb. As a result, the movement of the PTC heater 23b to both sides 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.

FIG. 10 is a perspective view showing the front side case member 23ea of the filter regeneration unit 23f in the embodiment from the inside. In other words, FIG. 10 is a perspective view showing the front side (front side internal space) of the internal space of the case 23e. FIG. 11 is a perspective view showing the back side case member 23eb of the filter reproducing unit 23f in the embodiment from the inside. In other words, FIG. 11 is a perspective view showing the back side (back side internal space) of the internal space of the case 23e.

For convenience of explanation, the back side case member 23eb will be described first. As shown in FIG. 9, the back side case member 23eb is formed of a synthetic resin material in a substantially triangular shape slightly larger than the outer shape of the back side heat radiating plate 23cc. As shown in FIG. 11, the back side case member 23eb has a heating space portion S1b (corresponding to the back side of the heating space portion S1) as a first space portion inside the case member 23eb. For example, a PTC heater 23b and a heat dissipation plate 23cc on the back side 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.

As shown in FIG. 11, an inner peripheral wall 23pb is formed on the bottom portion 23eda of the back side case member 23eb along the outer periphery of the back side heat radiating plate 23cc. The inner peripheral wall 23pb is formed at a predetermined distance from the first side portion 23edb, the second side portion 23edc, and the third side portion 23edd, and both ends of the inner peripheral wall 23pb are connected to the fourth side portion 23ede. ing. The space surrounded by the bottom portion 23eda and the inner peripheral wall 23pb is the heating space portion S1b. Therefore, the back side internal space formed by the back side case member 23eb is surrounded by the heating space portion S1b surrounded by the bottom portion 23eda and the inner peripheral wall 23pb, the bottom portion 23eda, the second side portion 23edc, and the inner peripheral wall 23pb. It also has a preheating space portion S2b as a second space portion, and a heat insulating space portion S3b as a second space portion formed between the third side portion 23edd and the inner peripheral wall 23pb. The preheating space portion S2b and the heat insulating space portion S3b function as a space (air layer) that insulates the heating space portion S1b and the outside of the case 23e, and also functions as a space in which the inside is heated by the heat transmitted from the heating space portion S1b. .. Therefore, the back-side internal space of the back-side case member 23eb is divided into a heating space portion S1b, a preheating space portion S2b, and a heat-retaining space portion S3b by the inner peripheral wall 23pb. That is, the inner peripheral wall 23pb is integrally formed with the bottom portion 23eda as a partition wall which is an example of a dividing portion for separating the heating space portion S1b, the preheating space portion S2b, and the heat retaining space portion S3b.

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, there are through holes 23xba 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. Bosses 23xb are formed respectively.

Two first support portions 23s1 are formed on the bottom portion 23eda of the back side case member 23eb. The first support portion 23s1 supports the outer peripheral portion 23 bch of the back side heat radiating plate 23 bc, the PTC heater 23 b superposed on the back side heat radiating plate 23 bc, and the outer peripheral portion 23 cah of the front side heat radiating plate 23 ca, respectively. Further, a second support portion 23s2 for supporting the outer peripheral portion 23 kbh of the back side heat radiating plate 23 bc is formed on the bottom portion 23 eda of the back side case member 23 eb.

The first support portions 23s1 are arranged on both sides of the back side case member 23eb in the Y direction, respectively, and are arranged in the vicinity of the boss 23xb, for example, adjacent to the boss 23xb. The first support portion 23s1 regulates the movement of the back side heat radiating plate 23cc (front side heat radiating plate 23ca) with respect to the Z direction in the ZY plane direction, the front side heat radiating plate 23ca, and the PTC heater 23b. The rib 23sa and the second rib 23sb that regulates the movement of the back side heat radiating plate 23cc, the front side heat radiating plate 23ca, and the PTC heater 23b with respect to the Y direction on the ZY surface of the back side heat radiating plate 23cc (front side heat radiating plate 23ca). Have.

The first rib 23sa is formed so as to project from the bottom 23eda of the back side case member 23eb, and the back side heat radiating plate 23cc is formed with a space between the back side heat radiating plate 23cc and the inner surface of the back side case member 23eb. Supports the outer peripheral portion 23 cvh of the. The first rib 23sa is connected to the outer peripheral surface of the boss 23xb. The first rib 23sa includes a support surface 23saa that supports the back side heat dissipation plate 23cc in the X direction, a regulation surface 23sab that regulates the movement of the back side heat dissipation plate 23cc, the front side heat dissipation plate 23ca, and the PTC heater 23b in the Z direction. Has. The second rib 23sb is formed so as to project from the bottom portion 23eda of the back side case member 23eb and straddle the inner peripheral wall 23pb and the second side portion 23edc, or the inner peripheral wall 23pb and the third side portion 23edd. The mechanical strength of is reinforced. The second rib 23sb includes a support surface 23sba that supports the back side heat dissipation plate 23cc in the X direction, a regulation surface 23sbab that restricts the movement of the back side heat dissipation plate 23cc, the front side heat dissipation plate 23ca, and the PTC heater 23b in the Y direction. Has.

The second support portion 23s2 is arranged adjacent to the shaft portion 23xa on one end side (the through hole 23ad side of the deodorizing filter portion 23a) of the back side case member 23eb in the Z direction. The second support portion 23s2 includes a third rib 23sc that regulates the movement of the back side heat radiating plate 23cc with respect to the Z direction on the ZY surface of the back side heat radiating plate 23cc (front side heat radiating plate 23ca), and a back side heat radiating plate 23cc (front side). The heat radiating plate 23ca) has a fourth rib 23sd that regulates the movement of the back side heat radiating plate 23cc with respect to the Y direction on the ZY surface.

The third rib 23sc has a support surface 23sc that supports the back side heat radiating plate 23cc in the X direction, and a regulation surface 23scb that restricts the movement of the back side heat radiating plate 23cc in the Z direction. The fourth rib 23sd has a support surface 23sda that supports the back surface side heat dissipation plate 23cc in the X direction, and a regulation surface 23sdb that restricts the movement of the back surface side heat dissipation plate 23cc in the Y direction. The third rib 23sc and the fourth rib 23sd are formed so as to project from the bottom 23eda of the back side case member 23eb, and a space is opened between the back side heat radiating plate 23cc and the inner surface of the back side case member 23eb. The outer peripheral portion 23 kbh of the back side heat radiating plate 23 bc is supported. The third rib 23sc and the fourth rib 23sd are formed so as to straddle the inner peripheral wall 23pb and the first side portion 23edb, and the mechanical strength of the inner peripheral wall 23pb is reinforced.

As shown in FIGS. 9 and 10, the front side case member 23ea is formed of a synthetic resin material in a substantially triangular shape slightly larger than the outer shape of the front side heat radiating plate 23ca, similarly to the back side case member 23eb. There is. The front side internal space of the front side case member 23ea has, for example, a heating space portion S1a in which the PTC heater 23b and the front side heat radiating plate 23ca are arranged, and the heating space portion S1a passes through the front side heat radiating plate 23ca. It functions as a space for heating the deodorizing filter 23aa.

The front side case member 23ea is formed in a box shape with a bottom, and the bottom portion 23ec, the first side portion 23ecb, the second side portion 23ecc, and the second side portion 23ec as the outer peripheral wall formed along the outer circumference of the front side case member 23ea. It has 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.

As shown in FIG. 10, an inner peripheral wall 23pa is formed on the bottom portion 23eca of the front side case member 23ea along the outer periphery of the front side heat radiating plate 23ca. The inner peripheral wall 23pa is formed at a predetermined distance from the first side portion 23ecb, the second side portion 23ec, and the third side portion 23ecd, and both ends of the inner peripheral wall 23pa are connected to the fourth side portion 23ece. ing. The space surrounded by the inner peripheral wall 23pa is referred to as the heating space portion S1a. Therefore, the front side internal space formed by the front side case member 23ea is surrounded by the heating space portion S1a surrounded by the bottom portion 23eca and the inner peripheral wall 23pa, the bottom portion 23eca, the second side portion 23ecc, and the inner peripheral wall 23pa. It has a preheating space portion S2a, and a heat insulating space portion S3a surrounded by a bottom portion 23eca, a third side portion 23ecd, and an inner peripheral wall 23pa. The preheating space portion S2a and the heat retaining space portion S3a function as a space (air layer) that insulates the heating space portion S1a and the outside of the case 23e, and also functions as a space in which the inside is heated by the heat transmitted from the heating space portion S1a. .. Therefore, the front side internal space of the front side case member 23ea is divided into a heating space portion S1a, a preheating space portion S2a, and a heat retaining space portion S3a by the inner peripheral wall 23pa. That is, the inner peripheral wall 23pa is integrally formed with the bottom 23eca as an example of a partition wall that separates the heating space portion S1a, the preheating space portion S2a, and the heat insulating space portion S3a.

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 shaft seat portion 23xc is formed with a shaft seat portion 23xc to which the tip of the shaft portion 23xa of the back side case member 23eb is abutted. The shaft seat portion 23xc has a through hole 23xca into which the screw 23t is screwed. Further, a boss seat portion 23xd to which the tip of the boss 23xb of the back side case member 23eb is abutted is located on both sides of the bottom portion 23eca of the front side case member 23ea in the Y direction and adjacent to the fourth side portion 23ece. It is formed. The boss seat portion 23xd has a through hole 23xda into which the screw 23t is screwed.

Further, a first rib 23se and a second rib 23sf are formed on the bottom portion 23eca of the front side case member 23ea so as to be adjacent to the boss seat portion 23xd. The first rib 23se and the second rib 23sf are abutted against the first rib 23sa and the second rib 23sb of the first support portion 23s1 of the back side case member 23eb, respectively. Further, the first rib 23se and the second rib 23sf of the front side case member 23ea are in contact with the front side heat radiating plate 23ca to move the front side heat radiating plate 23ca, the PTC heater 23b and the back side heat radiating plate 23cc in the X direction. regulate. The first rib 23se and the second rib 23sf are formed so as to project from the bottom 23eca of the front case member 23ea, and a space (air layer) is formed between the front heat dissipation plate 23ca and the bottom 23eda of the front case member 23ea. The outer peripheral portion 23cah of the front side heat radiating plate 23ca is supported in the open state.

A support portion 23s3 is formed on the bottom portion 23eca of the front side case member 23ea to support the outer peripheral portion 23cah of the front side heat radiating plate 23ca. The support portion 23s3 is arranged adjacent to the shaft seat portion 23xc on one end side (the through hole 23ad side of the deodorizing filter portion 23a) of the front side case member 23ea in the Z direction. The support portion 23s3 has a third rib 23sg that regulates the movement of the front heat dissipation plate 23ca in the Z direction in the ZY plane, and a front surface of the front heat dissipation plate 23ca in the Y direction in the ZY plane. It has a fourth rib 23sh that regulates the movement of the side heat radiating plate 23ca.

The third rib 23sg has a support surface 23sga that supports the front heat dissipation plate 23ca in the X direction, and a regulation surface 23sgb that regulates the movement of the front heat dissipation plate 23ca with respect to the Z direction in the ZY plane inward direction. The fourth rib 23sh has a support surface 23sha that supports the front heat dissipation plate 23ca in the X direction, and a regulation surface 23shb that regulates the movement of the front heat dissipation plate 23ca with respect to the Y direction in the ZY plane inward direction. The third rib 23sg and the fourth rib 23sh are formed so as to project from the bottom 23eca of the front case member 23ea, and a space (air layer) is formed between the front heat dissipation plate 23ca and the bottom 23eca of the front case member 23ea. The outer peripheral portion 23cah of the front side heat radiating plate 23ca is supported in the open state. The third rib 23sg and the fourth rib 23sh are formed so as to straddle the inner peripheral wall 23pa and the first side portion 23ecb, and the mechanical strength of the inner peripheral wall 23pa is reinforced.

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 as a regulating member described later, and the shaft member is passed through the through hole 23ad of the deodorizing filter portion 23a. The deodorizing filter unit 23a is supported via the 23xe. 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 34 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 34 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 characteristic configuration of this embodiment will be described below with respect to the case 23e of the filter reproduction unit 23f configured as described above. FIG. 12 is a plan view for explaining the heating space portion S1b, the preheating space portion S2b, and the heat retaining space portion S3b of the back side case member 23eb in the embodiment. FIG. 13 is a plan view showing a state in which the back side heat radiating plate 23cc is attached to the heating space portion S1b of the back side case member 23eb in the embodiment. Here, for convenience of explanation, the back side case member 23eb will be referred to.

When the case 23e is formed by combining the back side case member 23eb and the front side case member 23ea, the back side case member 23eb is heated in the case 23e as shown in FIGS. 8, 12 and 13. A heating space portion S1 is formed by combining the space portion S1b and the heating space portion S1a of the front side case member 23ea. Further, in the case 23e, a preheating space portion S2 is formed in which the preheating space portion S2b of the back side case member 23eb and the preheating space portion S2a of the front side case member 23ea are combined. Similarly, in the case 23e, a heat insulating space portion S3 is formed in which the heat insulating space portion S3b of the back side case member 23eb and the heat insulating space portion S3a of the front side case member 23ea are combined.

The preheating space portion S2 and the heat retaining space portion S3 are formed along the outer periphery of the case 23e, and are adjacent to the heating space portion S1 with the inner peripheral walls 23pb and 23pa interposed therebetween. The preheating space portion S2 is arranged in the circumferential direction of the deodorizing space portion 23aa on the approach side where the deodorizing filter 23aa enters the heating space portion S1, in other words, on the upstream side in the moving direction of the deodorizing filter 23aa with respect to the heating space portion S1. .. The heat insulating space portion S3 is arranged on the exit side where the deodorizing filter 23aa exits from the heating space portion S1 in the circumferential direction of the deodorizing space portion 23aa, in other words, on the downstream side in the moving direction of the deodorizing filter 23aa with respect to the heating space portion S1. ..

Further, as shown in FIG. 13, the heating space portion S1 includes the outer peripheral portions 23cah and 23kbh of the heat radiating plates 23c (front side radiating plate 23ca, back side radiating plate 23cc) supported in the heating space portion S1 and the inner peripheral wall. It has a predetermined gap d1 between 23pb and 23pa. Therefore, the air layer in the gap d1 prevents the heat of the heat radiating plate 23c from escaping from the outer peripheral portions 23cah and 23cbh of the heat radiating plate 23c to the case 23e through the inner peripheral walls 23pb and 23pa. In the embodiment, for example, the gap d1 is set to about 3 [mm], the distance d2 between the side surface of the heating space portion S1 side and the second side portions 23edc and 23ec, and the inner peripheral walls 23pb and 23pa. The distance d2 between the side surface of the heating space portion S1 side and the third side portions 23edd and 23ecd is set to about 20 [mm].

Therefore, as described above, the preheating space portion S2 and the heat retaining space portion S3 are formed along the outer peripheral side of the heating space portion S1 (the outer peripheral side of the heat radiating plate 23c), and the heat radiating plate 23c in the heating space portion S1 is formed. , The first support portion 23s1 and the second support portion 23s2 of the case 23e are supported with a space between the bottom portions 23eca and 23eda of the case 23e. Therefore, the heat of the heat radiating plate 23c is suppressed from being transferred to the case 23e and discharged to the outside of the case 23e without providing a heat insulating member between the bottom portions 23eca and 23eda of the case 23e and the heat radiating plate 23c. The size of 23e is being reduced.

[Action of preheating space and heat retaining space of case]
FIG. 14 is a schematic diagram for explaining the concept of the preheating space portion and the heat retaining space portion in the embodiment. In FIG. 14, which shows the concept, in order to distinguish it from FIG. It will be described as Si3 and an angle θi. FIG. 15 is a schematic diagram for explaining the actions of the preheating space portion S2 and the heat retaining space portion S3 of the case 23e in the embodiment. The preheating space portion S2 and the heat retaining space portion S3 in the case 23e suppress the temperature drop of the heating space portion S1 by suppressing the heat in the heating space portion S1 from escaping to the outside of the case 23e, and suppress the temperature drop of the heating space portion S1. The deodorizing filter 23aa is efficiently heated by S1. Therefore, in the preheating space portion S2 and the heat retaining space portion S3, the heat from the heating space portion S1 is transferred, so that the temperature inside the preheating space portion S2 and the heat retaining space portion S3 is the outside air (air to be treated that passes through the deodorizing filter). ) Is higher than the temperature.

Therefore, when the deodorizing filter 23aa rotates in the R direction with respect to the heating space portion S1, the preheating space portion S2 located on the approach side of the deodorizing filter 23aa with respect to the heating space portion S1 is immediately before being heated by the heating space portion S1. It has a function of preheating a part of the deodorizing filter 23aa. Similarly, the heat retaining space portion S3 located on the exit side of the deodorizing filter 23aa with respect to the heating space portion S1 has a function of retaining a part of the deodorizing filter 23aa heated in the heating space portion S1.

First, as a concept, as shown in FIG. 14, when the deodorizing filter 23aa rotates in the R direction, the heating space portion Si1 rotates around the center O1 of the through hole 23ad of the deodorizing filter 23aa, that is, with respect to the circumferential direction of the deodorizing filter 23aa. The angle θi1 is formed. In this case, when the preheating space portion S2 forms an angle θi2 around the center O1 and the heat insulating space portion S3 forms an angle θi3 around the center O1, θi1 ≧ θi2 and θi1 ≧ θi3 are set. In the drive unit 23h, as the deodorizing filter 23aa rotates, the region of the deodorizing filter 23aa heated in the preheating space portion Si1 is heated in the heating space portion Si1 and kept warm in the heat retaining space portion Si3. , The deodorizing filter 23aa is rotated at a predetermined cycle. For example, the drive unit 23h is controlled by a drive control circuit (not shown) as a control unit so as to continuously drive the deodorizing filter 23aa. The present invention is not limited to this, and the drive unit 23h may intermittently rotate, for example, the deodorizing filter 23aa. In this case, the drive unit 23h stops the region of the deodorizing filter 23aa stopped in the preheating space portion Si2 in the heating space portion Si1. Further, the drive unit 23h stops the region of the deodorizing filter 23aa stopped in the heating space portion Si1 in the heat retaining space portion Si3. The drive unit 23h intermittently drives the deodorizing filter 23aa in this way. In this way, the control of stopping the deodorizing filter 23aa in the preheating space portion Si2 and then stopping it in the heating space portion Si1 and the control of stopping it in the heating space portion Si1 and then stopping it in the heat insulating space portion Si3 will be performed. Either one may be executed, or both may be executed.

On the other hand, as a specific configuration example, the configuration of Case 23e in this embodiment will be described. In the case 23e of this embodiment, as shown in FIG. 15, the angle θ of the heating space portion S1 is around the center O2, and the position of the center O2 is downward in the figure with respect to the center O1 shown in FIG. It is out of alignment. Further, in this embodiment, the angle formed by the entire case 23e including the preheating space portion S2 and the heat insulating space portion S3, that is, the side surface of one end side of the case 23e (the approach side of the deodorizing filter 23aa) in the circumferential direction of the deodorizing filter 23aa. The angle with respect to the circumference of the center O3 connecting the case 23e with the side surface of the other end side (the exit side of the deodorizing filter 23aa) is formed to be equal to the angle θ1 of the heating space portion S1. Therefore, in the embodiment, the angle θ1 is around the center O2 and around the center O3, and the position is shifted downward in the figure with respect to the center O1 shown in FIG. In this respect, the conceptual diagram of FIG. 14 and the present embodiment are different. However, even in such a case 23e, when the preheated region in the preheating space portion S2 is heated in the heating space portion S1, or the region heated in the heating space portion S1 is the heat retaining space portion. When the heat is kept in S3, the same effect as the conceptual configuration can be obtained.

The region of the angle θ1 in the case 23e in the embodiment is partially expanded by a predetermined dimension (for example, about 5 mm) on both sides of the deodorizing filter 23aa in the circumferential direction with respect to the region of the angle θi1 shown in FIG. As a result, the heating space portion S1 is formed. Further, in the case 23e, the preheating space portion S2 and the heat retaining space portion S3 are formed by expanding the deodorizing filter 23aa on both sides in the circumferential direction with respect to the heating space portion S1 by a predetermined dimension (for example, about 20 mm). .. The angle θ1 is set to, for example, about 22.5 degrees.

[Rotation control of deodorizing filter]
In the case where a part of the deodorizing filter 23a is preheated by the preheating space portion S2 and the deodorizing filter 23a is kept warm by the heat retaining space portion S3, the rotation control of the deodorizing filter 23aa by the driving unit 23h will be described. FIG. 16 is a graph schematically showing a heated state of the deodorizing filter 23aa in the embodiment. In FIG. 16, the vertical axis indicates the temperature [° C.] of the heated portion of the deodorizing filter 23aa, and the horizontal axis indicates time. Further, in FIG. 16, the temperature change of the heated portion of the deodorizing filter 23aa in the embodiment is shown by a solid line. As a comparative example, the temperature change of the heated portion of the deodorizing filter 23aa in the configuration in which only the heating space portion S1 is provided in the case is shown by the alternate long and short dash line.

As an example of rotation control of the deodorizing filter unit 23a, the driving unit 23h continuously rotates the deodorizing filter 23aa at a predetermined rotation speed. In this case, for example, the deodorizing filter 23aa is continuously rotationally driven by the driving unit 23h so as to rotate the deodorizing filter 23aa once in one hour. At this time, as a part of the deodorizing filter 23aa is heated by the heating space portion S1, the temperature of the heated portion of the deodorizing filter 23aa changes. FIG. 16 shows the temperature change of the approach side end portion that starts entering the heating space portion S1 in the circumferential direction of the deodorizing filter 23aa.

First, in the comparative example, the temperature of the deodorizing filter 23aa changes as shown by the alternate long and short dash line in FIG. The approach-side end of the deodorizing filter 23aa that starts entering the heating space S1 enters the heating space S1 at time t2, and the temperature of the entry-side end gradually rises. When the temperature of the approach-side end of the deodorizing filter 23aa, that is, the heated portion rises from room temperature and reaches a predetermined temperature F or higher at time t4, the odorous component adsorbed on the heated portion of the deodorizing filter 23aa is decomposed. , The regenerating action of the deodorizing ability of the heated part occurs.

Subsequently, the heated portion of the deodorizing filter 23aa reaches the maximum temperature by being heated in the heating space portion S1, and is kept at a constant temperature as it is. By exiting the part S1, the temperature gradually decreases. Then, the temperature of the approach-side end of the deodorizing filter 23aa drops below the predetermined temperature F at time t5, and drops to room temperature. Therefore, in the comparative example, the effective time E1 (= t5-t4) is the time when the regenerating action of the deodorizing ability is obtained at the approach side end portion of the deodorizing filter 23aa.

On the other hand, as compared with the comparative example, in the embodiment, as shown by the solid line in FIG. 16, the approach side end portion of the deodorizing filter 23aa enters the preheating space portion S2 at time t1. After that, the temperature of the approach-side end gradually rises from room temperature and reaches the preheating temperature at time t2. Subsequently, the approach-side end of the deodorizing filter 23aa enters the heating space S1. Since the temperature of the approach-side end is preheated to the preheating temperature in the preheating space portion S2, the predetermined temperature F is reached relatively quickly at the time t3 earlier than the time t4 by being heated in the heating space portion S1. .. That is, the approach-side end of the deodorizing filter 23aa is preheated to a temperature higher than room temperature in the preheating space S2 before being heated by the heating space S1, so that the temperature reaches a predetermined temperature F after entering S1. The time it takes to reach is reduced. Subsequently, the approach-side end of the deodorizing filter 23aa reaches the maximum temperature by being heated in the heating space S1, and after being kept at a constant maximum temperature, the entry-side end is the heating space. By exiting from S1, the temperature gradually decreases.

At this time, the approach-side end of the deodorizing filter 23aa that has exited from the heating space S1 enters the heat-retaining space S3, so that the temperature drops slowly. That is, while the end of the deodorizing filter 23aa on the approach side moves in the heat insulating space S3, the time for which the deodorizing filter 23aa is maintained at a predetermined temperature F or higher is extended, and the deodorizing ability regeneration action continues. Then, the temperature of the approach-side end of the deodorizing filter 23aa drops below the predetermined temperature F at time t6 while moving in the heat insulating space S3. Therefore, in the example, the time during which the regeneration action is obtained at the approach side end of the deodorizing filter 23aa is the effective time E2 (= t6-t3), which is secured longer than the effective time E1 in the comparative example. After the temperature drops below the predetermined temperature F, the approach-side end of the deodorizing filter 23aa exits the heat insulating space S3 at time t7 and drops to room temperature. As described above, according to the embodiment, the effective time E2 at which the deodorizing ability regeneration action is obtained in the heated portion of the deodorizing filter 23aa is longer than the effective time E1 of the comparative example, so that the regeneration efficiency of the deodorizing filter 23aa is enhanced. ing.

Further, as another example of rotation control of the deodorizing filter unit 23a, as shown in FIG. 15, the angle of the heating space portion S1 with respect to the circumferential direction (rotation direction R) of the deodorizing filter unit 23aa (center centered on the shaft portion 23xa). When the angle) is θ1, the deodorizing filter 23aa may be intermittently driven by the driving unit 23h at a rotation angle smaller than the angle θ1, for example, a rotation angle of θ1 / 2. Further, in the preheating space portion S2 and the heat retaining space portion S3, the dimension extended from the heating space portion S1 with respect to the circumferential direction of the deodorizing filter 23aa may be set to, for example, an angle θ1 / 2.

By intermittently rotating the deodorizing filter 23aa in this way, the preheated region preheated in the preheating space portion S2 enters the heating space portion S1 and is heated, and the heating region heated in the heating space portion S1. However, the heat-retaining region enters the heat-retaining space portion S3 to be kept warm, and the heat-retaining region kept warm in the heat-retaining space portion S3 exits from the case 23e to the outside. Also in this case, as shown in FIG. 16, the effective time E2 can be appropriately secured.

In the above-mentioned example, the deodorizing filter 23aa is intermittently rotated at an angle θ1 / 2, but the deodorizing filter 23aa may be continuously rotated so as to be rotated by an angle θ1 / 2 at a predetermined time. The same effect as is obtained.

Further, immediately after the start of operation of the air purifier 1, the heat radiating plate 23c is not sufficiently heated by the PTC heater 23b, so that the rotation speed of the deodorizing filter 23aa becomes slow only during the first operation of the filter regeneration unit 23f, for example. By controlling the above, the heating time of the deodorizing filter 23aa may be secured for a long time. As a result, the entire deodorizing filter 23aa can be uniformly heated by the heating space portion S1 in the circumferential direction of the deodorizing filter 23aa.

[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.

During operation, the air purifier 1 continuously energizes the PTC heater 23b and drives the drive unit 23h to rotate, for example, the deodorizing filter unit 23a by a predetermined rotation angle at predetermined time intervals. This predetermined time is a processing time required to regenerate the deodorizing ability of the deodorizing filter unit 23a, and for example, 1.5 hours is exemplified. As a predetermined rotation angle, about 36 degrees is exemplified. 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. ..

As described above, in the internal space of the case 23e of the filter regeneration unit 23f of the deodorizing unit 23 of the embodiment, the first space portion (heating space portion S1) in which the PTC heater 23b is arranged and the PTC heater 23b are not arranged. It has two space portions (at least one of a preheating space portion S2 and a heat retaining space portion S3). When the preheating space portion S2 is provided, the deodorizing filter 23aa exposed to the air (outside air) outside the case 23e is preheated in the preheating space portion S2 before being heated in the heating space portion S1 to heat the deodorizing filter 23aa. Since the time required for the deodorizing filter 23aa to reach the predetermined temperature F at which the regenerating action of the deodorizing ability occurs in the space S1 is shortened, as a result, the effective time E2 at which the regenerating action is obtained at the predetermined temperature F can be extended. can. Further, when the heat insulating space portion S3 is provided, the deodorizing filter 23aa heated in the heating space portion S1 is kept warm in the heat insulating space portion S3 before being exposed to the outside air, so that the deodorizing filter 23aa is kept at a predetermined temperature F. Since the effective time E2 to drip becomes longer, the effective time E2 at which the regeneration action can be obtained at a predetermined temperature F can be extended as a result. Therefore, the heating efficiency of the deodorizing filter 23aa can be increased, and the regeneration efficiency of the deodorizing filter 23aa can be improved.

Further, the drive unit 23h in the deodorizing unit 23 of the embodiment stops the region of the deodorizing filter 23aa stopped in the preheating space portion S2 in the heating space portion S1 and subsequently stops in the heat retaining space portion S3. By intermittently driving the deodorizing filter 23aa, the deodorizing filter 23aa heated in the heating space S1 has a preheating action in the preheating space S2 and a heat retaining action in the heat retaining space S3. Can be effectively obtained.

Further, the preheating space portion S2 and the heat retaining space portion S3 of the case 23e in the deodorizing unit 23 of the embodiment are formed along the outer circumference of the case 23e. As a result, the preheating space portion S2 and the heat retaining space portion S3 can effectively insulate the heating space portion S1 and the outside of the case 23e, and the heating efficiency of the deodorizing filter 23aa in the heating space portion S1 can be improved. Can be enhanced.

Further, the case 23e in the deodorizing unit 23 of the embodiment has inner peripheral walls 23pa and 23pb that partition the heating space portion S1 and the preheating space portion S2 and also partition the heating space portion S1 and the heat retention space portion S3. Thereby, the heating space portion S1 and the preheating space portion S2 can be separated, and the heating space portion S1 and the heat retaining space portion S3 can be separately formed by a simple configuration.

In the embodiment, only one inner peripheral wall 23pa, 23pb is formed between the heating space portion S1 and the outer peripheral wall of the case 23e (for example, the second side portion 23edc, 23ecc, etc.), but the preheating space portion S2 and In the heat insulating space portion S3, for example, another inner peripheral wall may be further formed along the outer peripheral side of the inner peripheral walls 23pa and 23pb at intervals from the inner peripheral walls 23pa and 23pb, and the heat insulating property of the heating space portion S1 may be further formed. Can be further enhanced.

Further, the preheating space portion S2 and the heat retaining space portion S3 of the case 23e in the deodorizing unit 23 of the embodiment are formed by the inner peripheral walls 23pa and 23pb and the outer peripheral walls of the case 23e (for example, the second side portions 23edc and 23ecc). ing. As a result, the case 23e can be miniaturized.

The preheating space portion S2 and the heat retaining space portion S3 in this embodiment are formed to have the same size with respect to the circumferential direction (rotation direction) of the deodorizing filter 23aa. The size of one of the preheating space portion S2 and the heat retaining space portion S3 may be different. Further, although the case 23e in this embodiment has the preheating space portion S2 and the heat insulating space portion S3, it may be changed to a configuration having only one of the preheating space portion S2 or the heat insulating space portion S3.

1 Air purifier 23 Deodorizing unit (adsorption unit)
23a Deodorizing filter section 23a Deodorizing filter (filter)
23b PTC heater (heater)
23c Heat dissipation plate 23ca Front side heat dissipation plate 23cc Back side heat dissipation plate 23f Filter regeneration part 23e Case 23ea Front side case member 23eb Back side case member 23h Drive unit 23pa, 23pb Inner peripheral wall (partition wall)
S1 (S1a, S1b) Heating space part S2 (S2a, S2b) Preheating space part S3 (S3a, S3b) Heat insulation space part d1 Gap

Claims (3)

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 that covers the heat radiating plate is provided.
The internal space of the case includes a heating space portion in which the heater is arranged, a preheating space portion provided on the entry side where the filter enters the heating space portion and warms the filter without arranging the heater. The heating space portion is provided on the exit side where the filter exits from the heating space portion to keep the filter warm without arranging the heater, and the heating space portion and the preheating space portion are separated from each other. It has a partition wall that separates the heat insulating space from the heat insulating space.
The preheating space portion and the heat insulating space portion are formed as a heat insulating space along the outer circumference of the case.
When the case is viewed from the thickness direction of the filter, the outer peripheral wall formed along the outer circumference of the case is a suction unit formed over the entire circumference of the case. The preheating space portion and the heat insulating space portion are formed by the partition wall and the outer peripheral wall.
The adsorption unit according to claim 1. The suction unit according to claim 1 or 2 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.

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