Indoor unit of air conditioner

Abstract

An indoor unit (11) is an indoor unit (11) of an air conditioning device (10) for performing air conditioning of an indoor space (S1), comprising: a casing (20) having a downward suction port (23) opened toward the indoor space (S1); an indoor fan (25) for sucking air of the indoor space (S1) from the suction port (23) into the casing (20); a first filter (41) for collecting dust contained in the air sucked from the suction port (23); an ultraviolet irradiation unit (50) for irradiating ultraviolet rays toward the upstream side of the first filter (41) in the flow direction of air; and a shielding member (52) for shielding ultraviolet rays from the ultraviolet irradiation unit (50) toward the suction port (23).

Description

Technical Field

[0001] The present disclosure relates to an indoor unit of an air conditioning device. Background Art

[0002] In the past, in air conditioning devices for air conditioning indoor spaces such as office buildings, indoor units (so-called cassette-type) including downward suction ports were widely used. In such indoor units, dust contained in the air sucked into the casing is captured by a capturing member (filter). The dust captured by the capturing member contains bacteria and the like, and the capturing member that captures the dust will produce harmful components and odor components. In recent years, indoor units with the function of cleaning (sterilizing) the inside of the casing have been developed (see Patent Document 1). The indoor unit of the air conditioning device described in Patent Document 1 includes a discharge unit (active species generating unit) that generates active species. The indoor unit can decompose harmful components and odor components present in the indoor unit by driving the discharge unit and supplying active species to the surroundings of a heat exchanger, a drain pan, etc. inside the indoor unit, thereby cleaning (sterilizing) the indoor unit.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-35517 Summary of the invention

[0006] Technical problem to be solved by the invention

[0007] In recent years, there is a demand for further improvement in the cleaning capability of the interior of the casing of an indoor unit of an air conditioning apparatus. An object of the present disclosure is to provide an indoor unit having further improved cleaning capability of the interior of the casing.

[0008] Technical solutions adopted to solve technical problems

[0009] (1) The indoor unit of the air-conditioning device disclosed in the present invention is an indoor unit of the air-conditioning device for performing air conditioning in an indoor space, comprising: a casing, the casing being formed with a downward suction port opening toward the indoor space; a fan, the fan sucking the air of the indoor space from the suction port into the interior of the casing; a first collecting member, the first collecting member collecting dust contained in the air sucked from the suction port; a light source, the light source irradiating ultraviolet rays to the upstream side of the first collecting member in the flow direction of the air; and a shielding member, the shielding member shielding the ultraviolet rays from the light source toward the suction port.

[0010] The indoor unit of the air conditioner disclosed in the present invention can prevent ultraviolet rays emitted from a light source from irradiating the indoor space by a shielding member, thereby providing an indoor unit having a function of cleaning the first collecting member by ultraviolet rays and improving the cleaning capability of the interior of the housing of the indoor unit.

[0011] (2) In the indoor unit of the air-conditioning device disclosed in the present invention, it is preferred that it further includes a mesh protection member covering the suction port at the upstream side of the first collecting member in the flow direction of the air, wherein a first mesh size in a first area of ​​the protection member located around the light source is smaller than a second mesh size in a second area of ​​the protection member located farther from the light source than the first area, and the first mesh size is a size that a test finger with an outer diameter of φ8.5 cannot be inserted.

[0012] In this case, in the first region of the protection member, the user can be prevented from inserting his fingers into the housing, thereby preventing the ultraviolet rays emitted from the light source from being irradiated to the user's fingers.

[0013] (3) In the indoor unit of the air-conditioning device disclosed in the present invention, it is preferred that the protective component is configured to be detachable relative to the outer casing, and also includes a switch that can be turned on and off in conjunction with the detachment and removal operation of the protective component, and the switch can enable the light source to irradiate ultraviolet rays when the protective component is installed on the protective component, and cannot enable the light source to irradiate ultraviolet rays when the protective component is detached from the outer casing.

[0014] In this case, when the user removes the protective member to perform work, it is possible to prevent the user from being irradiated with ultraviolet rays emitted from the light source.

[0015] (4) In the indoor unit of the air conditioner of the present disclosure, preferably, a surface on the upstream side of the first collecting member in the air flow direction is a first surface configured as a plane, and ultraviolet rays are irradiated to the first surface from the light source.

[0016] In this case, by irradiating ultraviolet rays from the light source to the first plane-composed first surface, it is possible to suppress the generation of a portion of the first collecting member on the upstream side in the air flow direction that is not irradiated by ultraviolet rays. Thus, the first collecting member can be reliably cleaned by ultraviolet rays irradiated from the light source.

[0017] (5) In the indoor unit of the air-conditioning device disclosed in the present invention, it is preferred that it further includes a second collecting member, which is located on the downstream side of the first collecting member in the flow direction of the air, and collects dust contained in the air sucked in from the suction port. The first collecting member and the second collecting member are filters, and the mesh of the first collecting member is coarser than the mesh of the second collecting member.

[0018] In this case, since the second collecting member is provided in addition to the first collecting member, dust and the like contained in the air can be reliably collected.

[0019] (6) In the indoor unit of the air conditioner of the present disclosure, it is preferable that the light source is arranged at a position away from the flow of air flowing from the air inlet to the first collecting member.

[0020] In this case, it is possible to prevent the ventilation resistance of the air flowing in the casing from increasing due to the light source.

[0021] (7) In the indoor unit of the air-conditioning device disclosed in the present invention, it is preferred that the surface on the upstream side of the first collecting member in the flow direction of the air is a first surface constructed as a plane, and when the normal line of the first surface is in a state where it is inclined from the vertical direction toward the light source, ultraviolet rays are irradiated from the light source to the first collecting member.

[0022] In this case, in a structure where the light source is arranged at a position away from the air flow, the irradiation intensity of ultraviolet rays irradiated from the light source to the first surface can be ensured. Thus, the first collecting member can be reliably cleaned by ultraviolet rays irradiated from the light source.

[0023] (8) The indoor unit of the air conditioner of the present disclosure preferably further includes a generating unit that generates active species on an upstream side of the first collecting member in the flow direction of the air.

[0024] In this case, by including the light source and the generating unit, the cleaning capability of the interior of the housing can be further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of an air conditioning apparatus including the indoor unit of the present disclosure.

[0026] Figure 2 It is a perspective view showing an indoor unit of the air-conditioning apparatus of the present disclosure.

[0027] Figure 3 It is a perspective view showing the indoor unit in a state where the decorative panel is removed.

[0028] Figure 4 It is a bottom view of the indoor unit showing a state where the decorative panel is removed.

[0029] Figure 5 yes Figure 4 AA line section view in.

[0030] Figure 6It is a perspective view showing the indoor unit in a state where the decorative panel and the protective member are removed.

[0031] Figure 7 It is a bottom view of the indoor unit showing a state where the decorative panel and the protective member are removed.

[0032] Figure 8 It is a perspective schematic diagram showing the first filter and the second filter.

[0033] Fig. 9 It is a partially enlarged perspective view showing the ultraviolet irradiation part and the limit switch.

[0034] Fig.10 It is a partially enlarged perspective view showing the ultraviolet irradiation unit in a state where the shielding member (second member) is removed and the limit switch in a state where the protective cover is removed.

[0035] Fig.11 It is a schematic partial cross-sectional view showing the irradiation state of ultraviolet rays emitted from the ultraviolet irradiation section.

[0036] Fig.12 It is a perspective view showing a shielding member (second member).

[0037] Fig.13 It is a partially enlarged perspective view showing the active species generating section.

[0038] Fig.14 It is a perspective view showing a protection member (frame and mesh body).

[0039] Fig.15 This is a schematic diagram showing the operation of the limit switch.

[0040] Fig.16 It is a schematic partial cross-sectional view showing the irradiation state of ultraviolet rays emitted from the ultraviolet irradiation section (a case where the first filter is arranged to be inclined). DETAILED DESCRIPTION

[0041] (Overview of air conditioning equipment)

[0042] Figure 1 This is a schematic structural diagram of an air conditioning apparatus including the indoor unit of the present disclosure. Figure 1The air conditioning device 10 shown is a device that can cool and heat the indoor space S1 constructed inside the building part B by performing a vapor compression refrigeration cycle. The air conditioning device 10 includes an indoor unit 11 as an example of the indoor unit of the air conditioning device disclosed in the present invention. The air conditioning device 10 also includes an outdoor unit 12 and a refrigerant pipe 13. The refrigerant pipe 13 includes a liquid pipe 13L and a gas pipe 13G. In the air conditioning device 10, a refrigerant circuit is formed by connecting the indoor unit 11 and the outdoor unit 12 with the refrigerant pipe 13. The indoor unit 11 is arranged in the indoor space S1, and the outdoor unit 12 is arranged in the outdoor space S2. In addition, the outdoor space S2 in this description also includes the space outside the indoor space S1 in the building B, but the outdoor unit 12 of the present embodiment is arranged outside the building B in the outdoor space S2. In addition, in Figure 1 In the air conditioning device 10 shown, one indoor unit 11 is connected to one outdoor unit 12, but a plurality of indoor units 11 may be connected to one outdoor unit 12. In addition, in the present embodiment, the air conditioning device 10 that circulates the refrigerant in the refrigerant circuit to perform cooling and heating is illustrated, but the air conditioning device involved in the indoor unit of the present disclosure is not limited thereto, and may be an air conditioning device that circulates cold water and hot water supplied from a heat source device to perform cooling and heating, and the indoor unit may be a so-called fan coil unit.

[0043] (Structure of indoor unit)

[0044] Figure 2 It is a perspective view showing an indoor unit of the air-conditioning apparatus of the present disclosure. Figure 3 It is a perspective view showing the indoor unit in a state where the decorative panel is removed. Figure 4 It is a bottom view of the indoor unit showing a state where the decorative panel is removed. Figure 5 yes Figure 4 AA line section view in. Figure 1 as well as Figure 2 As shown, the indoor unit 11 has a so-called box-type form, and includes a casing 20 and a decorative panel 30 .

[0045] like Figure 3 as well as Figure 4 As shown, the housing 20 has a substantially rectangular shape when viewed from below, and includes a first housing 21 disposed on the upper side and a second housing 22 disposed on the lower side. Figure 5 As shown, a space A for accommodating the indoor fan 25, the heat exchanger 26, the collection member 40, the ultraviolet irradiation unit 50, and the active species generating unit 60 described later is formed inside the housing 20. The space A also serves as a flow path for the air in the housing 20. Figure 3 as well as Figure 4As shown, at the lower end of the housing 20, an air inlet 23 is formed in the central part of the rectangle, and four air supply ports 24 are formed to surround the air inlet 23. The air inlet 23 and the air supply port 24 are formed in the space A (refer to Figure 5 ) is an opening at the lower end of the second housing 22. A protective member 71 described below is disposed at the air inlet 23. In the indoor unit 11 in a normal use state, the lower end of the second housing 22 is covered by a decorative panel 30 (see Figure 2 ).

[0046] like Figure 2 As shown, the decorative panel 30 has a substantially rectangular shape when viewed from above, and includes an inlet grille 31 disposed in the center of the rectangle and four outlets 32 disposed around the inlet grille 31. A slit-shaped opening 33 is formed in the inlet grille 31. The opening 33 is connected to the inlet port 23 (see FIG. Figure 3 ) and space A (refer to Figure 5 The air outlet 32 ​​of the decorative panel 30 is connected via the air supply port 24 (see Figure 3 ) and space A (refer to Figure 5 The indoor unit 11 passes the indoor space S1 (see Figure 1 ) is sucked into the casing 20, and the air sucked into the casing 20 is supplied to the indoor space S1 from the air supply port 24 and the blow-off port 32.

[0047] like Figure 5 As shown in FIG. 1 , the indoor unit 11 includes an indoor fan 25 and a heat exchanger 26 in the interior (space A) of the housing 20. The indoor fan 25 is a fan for circulating the air in the indoor space S1. The heat exchanger 26 constitutes a part of the refrigerant circuit and circulates the refrigerant between the indoor fan 25 and the outdoor unit 12 through the refrigerant pipe 13. The indoor unit 11 drives the indoor fan 25 to draw the air (return air RA) in the indoor space S1 from the suction grille 31 (see FIG. 1 ). Figure 2 ) and the suction port 23 are sucked into the housing 20 and passed through the heat exchanger 26, and the cooled or heated air (supply air SA) is discharged from the supply air port 24 and the blow-off port 32 (refer to Figure 2 ) is supplied to the indoor space S1.

[0048] (Collection component)

[0049] Figure 6 It is a perspective view showing the indoor unit in a state where the decorative panel and the protective member are removed. Figure 7 It is a bottom view of the indoor unit showing a state where the decorative panel and the protective member are removed. Figure 8 is a three-dimensional schematic diagram showing a collection component. Figure 6 as well as Figure 7As shown in FIG. 1 , the indoor unit 11 includes a collecting member 40 inside the casing 20. The collecting member 40 is a member for collecting dust contained in the air (return air RA) of the indoor space S1. Figure 8 As shown, the collecting member 40 includes a first collecting member 40, i.e., a first filter 41, and a second collecting member 40, i.e., a second filter 42. The second filter 42 is a filter for collecting dust that cannot be collected by the first filter 41 (finer dust), and has a finer mesh than the first filter 41, thereby having a higher collection efficiency (about 60 to 95%). In other words, the mesh of the first filter 41 is coarser than the mesh of the second filter 42. In addition, in this embodiment, the second collecting member 40 is illustrated as a filter, but it may also be an electrostatic precipitator.

[0050] like Figure 5 As shown, the first filter 41 is arranged on the upstream side of the second filter 42 in the flow direction of the air. In the following description, the surface of the upstream side of the first filter 41 in the flow direction of the air is referred to as the first surface 41a. The first surface 41a of the first filter 41 is a plane. The "plane" mentioned here means that the surface has no bumps (folds) and the like, and no shadow area is generated when light is irradiated to the surface from an oblique direction. In addition, the capture component 40 shown in this embodiment includes the first filter 41 and the second filter 42, but the capture component in the indoor unit of the present invention may also be only the first filter.

[0051] In the indoor unit 11, the air is sucked from the suction grille 31 (see Figure 2 ) and the air (return air RA) sucked into the casing 20 through the suction port 23 passes through the collecting member 40. At this time, dust contained in the return air RA is collected by the first filter 41 and the second filter 42. In the indoor unit 11, dust, which is a source of harmful components and odor components, adheres to the first surface 41a of the first filter 41.

[0052] (Ultraviolet irradiation area)

[0053] Fig. 9 It is a partially enlarged perspective view showing the ultraviolet irradiation part and the limit switch. Fig.10 It is a partially enlarged perspective view showing the ultraviolet irradiation unit in a state where the shielding member (second member) is removed and the limit switch in a state where the protective cover is removed. Fig.11 It is a schematic partial cross-sectional view showing the irradiation state of ultraviolet rays emitted from the ultraviolet irradiation section. Fig.12 : is a three-dimensional diagram showing a shielding member (second member). Figure 5 to Figure 7 , Fig. 9 as well as Fig.10As shown, the indoor unit 11 includes an ultraviolet irradiation unit 50. The ultraviolet irradiation unit 50 is a portion for irradiating ultraviolet rays to the first surface 41a of the first filter 41, and includes a light source 51 and a shielding member 52. The light source 51 includes an LED element that emits ultraviolet rays when powered. A lens not shown is installed on the light source 51, and the ultraviolet rays emitted by the light source 51 are diffused to substantially the entire surface of the first surface 41a through the lens. In addition, the light source 51 shown in this embodiment is fixed to the housing 20 and irradiates ultraviolet rays to the first surface 41a from a fixed position, but it can also be configured to also include a displacement mechanism that displaces the light source 51 relative to the housing 20, and irradiates ultraviolet rays to the first surface 41a while displacing the light source 51 through the displacement mechanism.

[0054] like Figure 5 As shown, the ultraviolet irradiation unit 50 is arranged at a position away from the flow of air flowing from the air inlet 23 to the collecting member 40. In other words, the ultraviolet irradiation unit 50 is arranged at a position that does not overlap with the air inlet 23 and the collecting member 40 when viewed from above. If the ultraviolet irradiation unit 50 is arranged in the flow of air flowing from the air inlet 23 to the collecting member 40, the ultraviolet irradiation unit 50 becomes a major factor that increases the ventilation resistance. In the indoor unit 11 of the present disclosure, the ultraviolet irradiation unit 50 is arranged at a position away from the flow of air flowing from the air inlet 23 to the collecting member 40, thereby suppressing the increase in ventilation resistance.

[0055] (Shielding components)

[0056] like Figure 6 , Figure 7 as well as Figures 9 to 11 As shown in FIG. 1 , the ultraviolet irradiation unit 50 includes a shielding member 52 . The shielding member 52 is a member for limiting the irradiation range of ultraviolet rays irradiated from the light source 51 .

[0057] like Figures 9 to 11 As shown, the shielding member 52 is composed of a first member 53 that supports the light source 51 through the housing 20 and a second member 54 that covers the light source 51 supported by the first member 53. The shielding member 52 also serves as a member for supporting the light source 51 relative to the housing 20, and is screwed to the housing 20. The first member 53 and the second member 54 are made of metal, and the two members 53 and 54 are combined to form an integrated shielding member 52. In addition, the shielding member 52 can also be composed of a material other than metal (such as resin).

[0058] like Fig.11 As shown, the first member 53 includes an opening 53a for arranging the light source 51. The light source 51 is screwed to the first member 53 in a state of being fitted into the opening 53a.

[0059] like Fig. 9, Fig.11 as well as Fig.12 As shown, the second member 54 includes a box-shaped main body 54a. The second member 54 and the first member 53 are used in combination by placing the first member 53 inside the main body 54a. In the shielding member 52 in a state where the first member 53 and the second member 54 are combined, a space X is formed by surrounding the main body 54a and the first member 53. The ultraviolet irradiation unit 50 places the light source 51 in the space X.

[0060] The main body 54a includes an opening 54b. Fig.11 As shown in FIG. 5 , the ultraviolet light UV emitted from the light source 51 in the space X passes through the opening 54b and is irradiated to the space A outside the shielding member 52. In other words, among the ultraviolet light UV emitted by the light source 51 in the space X, the ultraviolet light UV that is directed to a direction other than the opening 54b is shielded by the shielding member 52. The main body 54a further includes a flange 54c around the opening 54b. Thus, a portion of the ultraviolet light UV that passes through the opening 54b and is directed to the space A is shielded by the flange 54c.

[0061] The main body 54a and the flange 54c of the shielding member 52 are arranged between the light source 51 and the suction port 23, and shield the ultraviolet UV from the light source 51 toward the space A toward the ultraviolet UV of the suction port 23. In other words, in the ultraviolet irradiation unit 50, the configuration of the opening 54b and the flange 54c is determined in such a way that the ultraviolet UV from the light source 51 toward the first surface 41a of the first filter 41 is not shielded by the shielding member 52. In addition, in the housing 20, when there is an opening facing the indoor space S1 in addition to the suction port 23, it is preferred that the main body 54a and the flange 54c are also arranged between the opening and the light source 51. In addition, the shielding member 52 is not limited to the structure shown in the present embodiment. For example, when the light source 51 is not stored in the space X and is arranged in the space A in an exposed state, the shielding member can also be arranged in a plate-like form (without the space X) on the upstream side of the light source 51. In other words, the shielding member of the present disclosure may have a configuration capable of suppressing the ultraviolet rays emitted from the light source 51 from being irradiated to the indoor space S1 .

[0062] (Active species production unit)

[0063] like Figure 6 , Figure 7 as well as Fig.13As shown, the indoor unit 11 includes an active species generating section 60. The active species generating section 60 is a portion for supplying active species to the air passing through the outer casing 20, and includes a frame 63 formed with an inlet 61 and an outlet 62. The active species generating section 60 has a discharge section (not shown) including a needle electrode and an opposing electrode inside the frame 63, and a high voltage is applied to the discharge section to generate a type of plasma discharge, namely, diamond discharge. The active species generating section 60 generates active species with high oxidative decomposition power by causing diamond discharge. The active species generated by the active species generating section 60 include high-speed electrons, ions, hydroxyl radicals, and excited oxygen molecules, which decompose harmful components and odor components in the air composed of small organic molecules such as ammonia, aldehydes, and nitrogen oxides.

[0064] The active species generating unit 60 introduces a portion of the air in the housing 20 into the frame 63 from the inlet 61, and discharges the active species generated in the discharge unit together with the air from the outlet 62. Fig.13 As shown, the suction port 61 and the discharge port 62 are arranged on the upstream side of the first filter 41 in the air flow direction. Therefore, the active species generating unit 60 generates active species on the upstream side of the first filter 41. In the indoor unit 11, the light source 51 and the active species generating unit 60 are included, so that the first surface 41a of the first filter 41 can be cleaned (sterilized) by ultraviolet rays, and can also be cleaned by active species. Therefore, the indoor unit 11 can further improve the cleaning ability of the inside of the casing 20 compared with the existing indoor unit that only includes the active species generating unit.

[0065] like Figure 6 as well as Figure 7 As shown, in the indoor unit 11 of the present disclosure, the active species generating unit 60 is disposed at a position facing the ultraviolet irradiation unit 50 across the air inlet 23 and the first filter 41. With such a structure, variations in the cleanliness of the first surface 41a are suppressed.

[0066] (Ministry of Conservation)

[0067] like Figure 4 As shown, the indoor unit 11 includes a protection portion 70 for protecting a user from ultraviolet rays irradiated from the ultraviolet irradiation portion 50. The protection portion 70 includes a protection member 71 and a limit switch 75.

[0068] (Protective components)

[0069] Fig.14 : is a three-dimensional diagram showing a protective member (frame and mesh body). Figure 3 to Figure 5The protective member 71 shown is a member for preventing a part of the human body (particularly a finger) from entering the ultraviolet irradiation range in the housing 20. The protective member 71 covers the inlet 23, thereby preventing the finger from entering the space A from the indoor space S1 side of the inlet 23 (see Figure 5 ) Fig.14 As shown, the protective member 71 includes a frame 72 and a mesh body 73. Figure 3 as well as Figure 4 As shown, the protection member 71 further includes a stay 74 .

[0070] like Fig.14 As shown, the frame 72 is a member obtained by assembling steel materials into a substantially rectangular shape, and is formed with a mounting hole 72a and a protrusion 72b. The protrusion 72b protrudes toward the upper surface side of the frame 72 (the upper side when mounted to the housing 20). The mesh body 73 is attached to the lower surface side of the frame 72 (the lower side when mounted to the housing 20).

[0071] like Figure 3 as well as Figure 4 As shown, a pair of stays 74 are attached to the lower end of the second housing 22. The protection member 71 is mounted to the housing 20 by inserting the stays 74 into the mounting holes 72a and hanging the frame 72 on the stays 74. Among the parts 72 to 74 constituting the protection member 71, the frame 72 and the mesh body 73 are detachable relative to the housing 20. The frame 72 and the mesh body 73 can swing relative to the housing 20 with the contact portion between the frame 72 and the stays 74 as a fulcrum. When the indoor unit 11 performs air conditioning of the indoor space S1, the protection member 71 is arranged at a position covering the air inlet 23. When the indoor unit 11 stops air conditioning of the indoor space S1 and performs maintenance inside the housing 20, the protection member 71 is arranged at a position away from the air inlet 23. The protection member 71 is configured to be detachable relative to the housing 20.

[0072] The mesh body 73 is a member formed by assembling steel wires in a lattice shape, and has a first region 73a and a second region 73b. Figure 3 , Figure 4 as well as Fig.14 , the first region 73a is surrounded by a thick solid line. The first region 73a is a region of the mesh body 73 disposed near the ultraviolet irradiation unit 50. The second region 73b is a region other than the first region 73a of the mesh body 73. The second region 73b is a region disposed at a position farther from the ultraviolet irradiation unit 50 than the first region 73a.

[0073] The first area 73a is an area where the user's finger (a part of the human body) may be irradiated by the ultraviolet rays emitted from the ultraviolet irradiation section 50 when the user's finger (a part of the human body) is inserted from the protective member 71 into the interior of the housing 20. The second area 73b is an area where the user's finger (a part of the human body) is not irradiated by the ultraviolet rays emitted from the ultraviolet irradiation section 50 when the user's finger (a part of the human body) is inserted from the protective member 71 into the interior of the housing 20. The size of the mesh body 73 in the first area 73a is the first mesh size M1, and the size of the mesh body 73 in the second area 73b is the second mesh size M2. In addition, in the present embodiment, the mesh (lattice) formed in the protective member 71 is a rectangular shape, and the size of the short side is referred to as the "mesh size".

[0074] In the protection part 70, the first mesh size M1 of the first area 73a is made smaller than the second mesh size M2 of the second area 73b. Specifically, the first area 73a of the present embodiment is composed of steel wires with a wire diameter of 2 mm arranged at a pitch of 9 mm on the short side, and the opening size of the short side is about 7 mm. That is, the first mesh size M1 of the first area 73a is a size that a test finger with an outer diameter of φ8.5 cannot be inserted. Therefore, in the first area 73a, it is impossible for the user to insert a finger into the gap of the mesh. In the indoor unit 11, the protection member 71 can prevent the ultraviolet rays emitted from the ultraviolet irradiation unit 50 from irradiating the human body.

[0075] On the other hand, the second area 73b of the present embodiment is composed of steel wires with a wire diameter of 2 mm arranged at a pitch of 13.5 mm on the short side, and the opening size of the short side is about 11.5 mm. That is, the second mesh size M2 of the second area 73b is a size that a test finger with an outer diameter of φ8.5 can be inserted. In the indoor unit 11, by limiting the range of the first area 73a, the protection member 71 is lightweight.

[0076] (Limit switch)

[0077] Fig.15 This is a schematic diagram showing the action of the limit switch. Fig. 9 as well as Fig.10 As shown, the limit switch 75 includes a switch body 76 and a protective cover 77. Figure 6 , Figure 7 , Fig. 9 as well as Fig.10 As shown, the limit switch 75 is disposed inside the housing 20. The limit switch 75 is a device for preventing ultraviolet rays from irradiating the human body when the user removes the protection member 71 from the housing 20.

[0078] like Fig. 9As shown, the protective cover 77 has an opening 77a. When the protective member 71 is mounted at a predetermined position of the housing 20, the protrusion 72b (see Fig.14 ) is inserted into the protective cover 77 from the opening 77a.

[0079] like Fig.10 As shown, the switch body 76 is arranged inside the protective cover 77. The switch body 76 includes a pressed portion 76a. When the protective member 71 is mounted at a predetermined position of the housing 20, the protrusion 72b (see FIG. 24 ) inserted from the opening 77a into the protective cover 77 is pressed. Fig.14 ) presses the pressed portion 76a.

[0080] like Fig.15 As shown, the limit switch 75 is connected to a power supply circuit 80 that supplies power to the light source 51. The limit switch 75 is in a state where the pressed portion 76a of the switch body 76 is pressed (see Fig.15 ), power can be supplied from the power circuit 80 to the light source 51. At this time, the light source 51 emits ultraviolet light UV. The limit switch 75 is in a state where the pressed portion 76a is not pressed (see Fig.15 ), the supply of power from the power supply circuit 80 to the light source 51 is blocked. At this time, the light source 51 does not emit ultraviolet rays UV.

[0081] When the protection member 71 is mounted at a predetermined position of the housing 20, the protection portion 70 enables the light source 51 to irradiate ultraviolet light through the limit switch 75 (see Fig.15 ), when the protective member 71 is removed from the housing 20, the light source 51 is prohibited from irradiating ultraviolet rays by the limit switch 75 (refer to Fig.15 In this way, in the indoor unit 11, the limit switch 75 prevents ultraviolet rays from being irradiated from the ultraviolet irradiation unit 50 to the human body.

[0082] (Regarding another embodiment)

[0083] Fig.16 1 is a schematic partial cross-sectional view showing the irradiation state of ultraviolet rays emitted by the ultraviolet irradiation unit (when the first filter is arranged at an inclination). In the indoor unit 11 described above, the first filter 41 is arranged in a posture with the normal line of the first surface 41a facing vertically downward (see FIG. 1 ). Fig.11 ), but the first filter 41 may also be configured such that the normal line of the first surface 41a is inclined relative to the vertical direction. Fig.16 In the indoor unit 11 shown in FIG. 1 , the first filter 41 is disposed so that the normal line L2 of the first surface 41a is inclined at an angle θ toward the light source 51 with respect to the vertical line L1. Fig.16In the indoor unit 11 shown in the figure, in this state, ultraviolet rays are irradiated from the light source 51 onto the first surface 41a.

[0084] The cleaning ability of the first filter 41 by ultraviolet rays can be evaluated by the product of the irradiation intensity of the ultraviolet rays and the irradiation time. For example, when ultraviolet rays UV with an irradiation intensity Y1 are irradiated to the first surface 41a at an incident angle α, the irradiation intensity Y2 of the ultraviolet rays on the first surface 41a is cosα times the irradiation intensity Y1 (Y2=Y1cosα).

[0085] like Fig.16 As shown, in the indoor unit 11 of the present disclosure, ultraviolet rays are irradiated from the light source 51 to the first surface 41a of the first filter 41 in a state where the normal line L2 of the first surface 41a is tilted at an angle θ from the vertical downward direction to the light source 51 side. In such a structure, compared with the case where the first filter 41 is not tilted (the case where θ=0°), the incident angle α of the ultraviolet rays UV relative to the first surface 41a can be made close to 90°, thereby increasing the incident angle α of the ultraviolet rays UV relative to the first surface 41a compared with the case where the light source 51 is arranged at a position away from the air flow, thereby increasing the irradiation intensity Y2 of the ultraviolet rays to the first filter 41. Therefore, in Fig.16 In the indoor unit 11 shown, the ultraviolet rays irradiated from the light source 51 can ensure sufficient irradiation intensity to clean the first surface 41a, so that the first filter 41 can be reliably cleaned. In addition, the first filter 41 can also be set in a state of being always inclined at an angle θ relative to the housing 20, or can be configured to be inclined only when ultraviolet rays are irradiated from the light source 51 using a mechanism not shown in the figure.

[0086] (About the timing of ultraviolet irradiation)

[0087] The air conditioner 10 can start and stop operation by operating a remote controller (not shown) disposed in the indoor space S1 or the like. When the operation of the air conditioner 10 starts, the indoor unit 11 irradiates ultraviolet rays from the light source 51 to the first surface 41a of the first filter 41 for a predetermined time. Thus, the user will not be aware of the timing of ultraviolet irradiation, and the first filter 41 can be cleaned each time the operation starts. The indoor unit 11 can also be configured to perform residual operation for a predetermined time when the operation of the air conditioner 10 stops, and irradiate ultraviolet rays from the light source 51 to the first surface 41a of the first filter 41 during the residual operation. In this case, the user will not be aware of the timing of ultraviolet irradiation, and the first filter 41 can be cleaned at the end of the operation, and the next operation can be started in the cleaned state in the housing 20.

[0088] (About UV exposure time)

[0089] The light source 51 used in the indoor unit 11 has a characteristic that the irradiation intensity decreases as the irradiation time increases. The indoor unit 11 has a function of recording the irradiation time of the light source 51, and increases the irradiation time of ultraviolet rays once as the irradiation time increases. In this case, even if the irradiation intensity of the light source 51 decreases as the cumulative operation time of the indoor unit 11 increases, the first filter 41 can be reliably cleaned.

[0090] In addition, the indoor unit 11 may also set a limit on the irradiation time of the light source 51 at one time. Thus, it is possible to prevent the light source 51 from reaching its life before the indoor unit 11 reaches its product life. Thus, without replacing the light source 51, the cleaning function of the first filter 41 achieved by the ultraviolet irradiation unit 50 can be maintained before the indoor unit 11 reaches its product life.

[0091] [Effects of the Embodiments]

[0092] (1) The indoor unit 11 shown in the above embodiment is an indoor unit 11 of an air conditioning device 10 for performing air conditioning of an indoor space S1, and includes: a casing 20, wherein the casing 20 is formed with a downward suction port 23 opened to the indoor space S1; an indoor fan 25, wherein the indoor fan 25 sucks the air of the indoor space S1 from the suction port 23 into the interior of the casing 20; a first filter 41, wherein the first filter 41 captures dust contained in the air sucked from the suction port 23; an ultraviolet irradiation unit 50, wherein the ultraviolet irradiation unit 50 irradiates ultraviolet rays toward the upstream side of the first filter 41 in the flow direction of the air; and a shielding member 52, wherein the shielding member 52 shields the ultraviolet rays from the ultraviolet irradiation unit 50 toward the suction port 23.

[0093] The indoor unit 11 can prevent the ultraviolet rays emitted from the ultraviolet irradiation unit 50 from irradiating the indoor space S1 by the shielding member 52. Thus, the indoor unit 11 having the function of cleaning the first filter 41 by ultraviolet rays can be provided, and the cleaning capability inside the casing 20 of the indoor unit 11 can be improved.

[0094] (2) The indoor unit 11 shown in the above embodiment also includes a grid-shaped protective member 71 that covers the air inlet 23 at the upstream side of the first filter 41 in the air flow direction, and a first mesh size M1 of a first area 73a located around the light source 51 in the protective member 71 is smaller than a second mesh size M2 of a second area 73b located farther from the light source 51 than the first area 73a in the protective member 71, and the first mesh size M1 is a size that a test finger with an outer diameter of φ8.5 cannot be inserted.

[0095] In this case, in the first area 73a in the protection member 71, it is possible to prevent the user from putting his fingers into the housing 20. Thus, it is possible to prevent the ultraviolet rays emitted from the light source 51 from being irradiated to the user's fingers.

[0096] (3) The protection member 71 of the indoor unit 11 shown in the above embodiment is provided to be detachable relative to the housing 20, and the indoor unit 11 further includes a limit switch 75 that is turned on and off in conjunction with the detachment operation of the protection member 71. The limit switch 75 of the indoor unit 11 enables the ultraviolet irradiation unit 50 to irradiate ultraviolet rays when the protection member 71 is attached to the housing 20, and disables the ultraviolet irradiation unit 50 to irradiate ultraviolet rays when the protection member 71 is detached from the housing 20.

[0097] In the above-described structure, when the user removes the protection member 71 and performs work, it is possible to prevent the user from being irradiated with ultraviolet rays emitted from the ultraviolet irradiation unit 50 .

[0098] (4) In the indoor unit 11 shown in the above embodiment, the surface of the first filter 41 upstream in the air flow direction is the first surface 41a configured as a plane. In the indoor unit 11, ultraviolet rays are irradiated from the light source 51 onto the first surface 41a.

[0099] In this case, by irradiating the first surface 41a formed into a plane with ultraviolet rays from the ultraviolet irradiation unit 50, it is possible to suppress the generation of a portion of the first filter 41 on the upstream side in the air flow direction that is not irradiated with ultraviolet rays. Thus, the first filter 41 can be reliably cleaned by the ultraviolet rays irradiated from the ultraviolet irradiation unit 50.

[0100] (5) The indoor unit 11 shown in the above embodiment further includes a second filter 42 as a filter for collecting dust contained in the air sucked from the suction port 23, downstream of the first filter 41 in the air flow direction. The first filter 41 in the indoor unit 11 has a larger mesh than the second filter 42.

[0101] In this case, since the second filter 42 is provided in addition to the first filter 41 , dust and the like contained in the air can be surely captured.

[0102] (6) In the indoor unit 11 shown in the above embodiment, the ultraviolet irradiation unit 50 is arranged at a position away from the flow of air flowing from the air inlet 23 to the first filter 41 .

[0103] In this case, it is possible to prevent the ventilation resistance of the air flowing in the housing 20 from increasing due to the ultraviolet irradiation unit 50 .

[0104] (7) In the indoor unit 11 shown in the above-mentioned other embodiment, ultraviolet rays are irradiated to the first filter 41 by the ultraviolet irradiation unit 50 while the normal line L2 of the first surface 41 a is inclined at an angle θ from the vertical line L1 toward the ultraviolet irradiation unit 50 .

[0105] In this case, in the structure where the ultraviolet irradiation unit 50 is arranged away from the air flow, the irradiation intensity of the ultraviolet rays irradiated to the first surface 41a from the ultraviolet irradiation unit 50 can be ensured. Therefore, the first filter 41 can be reliably cleaned by the ultraviolet rays irradiated from the ultraviolet irradiation unit 50.

[0106] (8) The indoor unit 11 shown in the above embodiment further includes an active species generating unit 60 that generates active species on the upstream side of the first filter 41 in the air flow direction.

[0107] In this case, by including the light source 51 and the active species generating unit 60 , the cleaning capability of the interior of the housing 20 can be further improved.

[0108] In addition, the present disclosure is not limited to the above-mentioned examples, but is shown by the scope of claims, and is intended to include the meaning equivalent to the scope of claims and all modifications within the scope.

[0109] Explanation of symbols

[0110] 10. Air conditioning unit;

[0111] 11 indoor units;

[0112] 20 housing;

[0113] 23 suction port;

[0114] 25Indoor fan (fan);

[0115] 41 a first filter (a first collecting member);

[0116] 41a first surface;

[0117] 42 second filter (second capturing member);

[0118] 50 ultraviolet irradiation part;

[0119] 51 light sources;

[0120] 52 shielding member;

[0121] 60 active species producing part (producing part);

[0122] 71 protection components;

[0123] 73a first area;

[0124] 73b Second area;

[0125] 75 limit switch (switch);

[0126] S1 indoor space;

[0127] M1 first mesh size;

[0128] M2 second mesh size.

Claims

1. An indoor unit (11) of an air-conditioning device (10), the indoor unit (11) of an air-conditioning device (10) being an indoor unit (11) of an air-conditioning device (10) for performing air conditioning of an indoor space (S1), characterized in that: include: A housing (20) formed with a downward suction port (23) opening toward the indoor space (S1); a fan (25), wherein the fan (25) sucks air in the indoor space (S1) from the suction port (23) into the interior of the housing (20); a first collecting member (41), the first collecting member (41) collecting dust contained in the air sucked from the suction port (23); a light source (51) that irradiates ultraviolet rays to an upstream side of the first collecting member (41) in a flow direction of air; a shielding member (52) for shielding ultraviolet rays from the light source (51) toward the suction port (23); as well as a mesh-shaped protective member (71) covering the suction port (23) at the upstream side of the first collecting member (41) in the flow direction of the air, A first mesh size (M1) in a first region (73a) of the protective member (71) located around the light source (51) is smaller than a second mesh size (M2) in a second region (73b) of the protective member (71) located farther from the light source (51) than the first region (73a), The first grid size (M1) is such a size that a test finger with an outer diameter of φ8.5 cannot be inserted.

2. An indoor unit (11) of an air-conditioning device (10), the indoor unit (11) of an air-conditioning device (10) being an indoor unit (11) of an air-conditioning device (10) for performing air conditioning of an indoor space (S1), characterized in that: include: A housing (20) formed with a downward suction port (23) opening toward the indoor space (S1); a fan (25), wherein the fan (25) sucks air in the indoor space (S1) from the suction port (23) into the interior of the housing (20); a first collecting member (41), the first collecting member (41) collecting dust contained in the air sucked from the suction port (23); a light source (51) that irradiates ultraviolet rays to an upstream side of the first collecting member (41) in the flow direction of air and is arranged at a position away from the flow of air flowing from the suction port (23) to the first collecting member (41); and a shielding member (52) for shielding ultraviolet rays from the light source (51) toward the suction port (23); The shielding member (52) includes a first member (53) and a second member (54), wherein the first member (53) supports the light source (51), and the second member (54) has an opening (54b) and includes a box-shaped main body (54a) covering the light source (51). Ultraviolet rays emitted by the light source (51) are irradiated to a space (A) outside the shielding member (52) through the opening (54b).

3. An indoor unit (11) of an air-conditioning device (10), the indoor unit (11) of an air-conditioning device (10) being an indoor unit (11) of an air-conditioning device (10) for performing air conditioning of an indoor space (S1), characterized in that: include: A housing (20) formed with a downward suction port (23) opening toward the indoor space (S1); a fan (25), wherein the fan (25) sucks air in the indoor space (S1) from the suction port (23) into the interior of the housing (20); a first collecting member (41), the first collecting member (41) collecting dust contained in the air sucked from the suction port (23); a second collecting member (42), the second collecting member (42) being arranged on the downstream side of the first collecting member in the air flow direction, having a mesh finer than that of the first collecting member, and collecting dust contained in the air sucked in from the suction port; a light source (51) that irradiates ultraviolet rays to an upstream side of the first collecting member (41) in the flow direction of air and is arranged at a position away from the flow of air flowing from the suction port (23) to the first collecting member (41); and a shielding member (52) for shielding ultraviolet rays from the light source (51) toward the suction port (23); The surface of the first collecting member (41) on the upstream side in the flow direction of the air is a first surface (41a) formed as a plane. Ultraviolet rays are irradiated from the light source (51) onto the first surface (41a).

4. The indoor unit (11) of the air conditioning device (10) according to claim 1, characterized in that: The protective member (71) is configured to be detachable relative to the housing (20). The indoor unit (11) of the air conditioner (10) further includes a switch (75) that is turned on and off in conjunction with the removal operation of the protection member (71). When the protective member (71) is mounted on the housing (20), the switch (75) enables the light source (51) to radiate ultraviolet light, and when the protective member (71) is detached from the housing (20), the switch (75) does not enable the light source (51) to radiate ultraviolet light.

5. The indoor unit (11) of the air conditioning device (10) according to claim 3, characterized in that: The first collecting member (41) and the second collecting member (42) are filters.

6. The indoor unit (11) of the air conditioning device (10) according to claim 3, characterized in that: In a state where a normal line (L2) of the first surface (41a) is inclined from a vertical downward direction toward the light source (51), ultraviolet rays are irradiated from the light source (51) to the first collecting member (41).

7. The indoor unit (11) of the air conditioning device (10) according to any one of claims 1 to 6, characterized in that: The indoor unit (11) of the air conditioning device (10) further includes a generating section (60) that generates active species at an upstream side of the first collecting member (41) in the flow direction of the air.

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