WO2023026623A1 - 空気調和装置の室内機 - Google Patents
空気調和装置の室内機 Download PDFInfo
- Publication number
- WO2023026623A1 WO2023026623A1 PCT/JP2022/022282 JP2022022282W WO2023026623A1 WO 2023026623 A1 WO2023026623 A1 WO 2023026623A1 JP 2022022282 W JP2022022282 W JP 2022022282W WO 2023026623 A1 WO2023026623 A1 WO 2023026623A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light source
- indoor unit
- air
- casing
- suction port
- Prior art date
Links
- 238000004378 air conditioning Methods 0.000 title claims abstract description 8
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 22
- 239000000428 dust Substances 0.000 claims abstract description 17
- 230000001681 protective effect Effects 0.000 claims description 51
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 9
- 239000003507 refrigerant Substances 0.000 description 9
- 238000004140 cleaning Methods 0.000 description 8
- 230000001678 irradiating effect Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006864 oxidative decomposition reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0007—Indoor units, e.g. fan coil units
- F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
- F24F1/0073—Indoor units, e.g. fan coil units with means for purifying supplied air characterised by the mounting or arrangement of filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
- F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
Definitions
- the present disclosure relates to an indoor unit of an air conditioner.
- an indoor unit (so-called cassette type) equipped with a downward suction port has been widely used in air conditioners for air conditioning indoor spaces such as office buildings.
- dust contained in the air sucked into the casing is collected by a collecting member (filter).
- the dust collected by the collecting member contains bacteria and the like, and the collecting member that has collected the dust generates harmful components and odor components.
- an indoor unit having a function of cleaning (sterilizing) the inside of a casing has been developed (see Patent Document 1).
- the indoor unit of the air conditioner described in Patent Document 1 includes a discharge unit (active species generator) that generates active species.
- the indoor unit drives the discharge unit and supplies active species to the periphery of the heat exchanger, drain pan, etc. inside the indoor unit, thereby decomposing harmful components and odorous components present inside the indoor unit and cleaning them. can be disinfected.
- An object of the present disclosure is to provide an indoor unit having a higher ability to clean the inside of the casing.
- An indoor unit of an air conditioner is an indoor unit of an air conditioner that performs air conditioning in an indoor space, and includes a casing formed with a downward suction port that opens toward the indoor space. a fan for sucking air in the indoor space into the casing from the suction port; a first collecting member for collecting dust contained in the air sucked from the suction port; 1. A light source for irradiating ultraviolet rays on the upstream side of a collection member, and a shielding member for shielding ultraviolet rays directed from the light source to the suction port.
- the shielding member can prevent ultraviolet rays emitted from the light source from irradiating the indoor space. As a result, it is possible to provide an indoor unit having a function of cleaning the first collection member with ultraviolet rays, and to enhance the cleaning performance of the interior of the casing of the indoor unit.
- the indoor unit of the air conditioner of the present disclosure further includes a mesh-shaped protective member that covers the suction port on the upstream side of the first collection member in the air flow direction, and A first mesh size in a first region located around the light source is smaller than a second mesh size in a second region of the protective member located farther from the light source than the first region. , it is preferable that the first mesh size is such that a test finger having an outer diameter of ⁇ 8.5 cannot be inserted.
- the first region of the protective member can prevent the user from inserting his/her finger into the casing. Thereby, it is possible to prevent the user's finger from being irradiated with the ultraviolet rays emitted from the light source.
- the indoor unit of the air conditioner of the present disclosure is provided with the protective member detachable from the casing, and further includes a switch that is turned on and off in conjunction with the attachment/detachment operation of the protective member, The switch enables the light source to emit ultraviolet light when the protective member is attached to the casing, and disables the light source to emit ultraviolet light when the protective member is detached from the casing. is preferable.
- the surface on the upstream side of the first collection member in the air flow direction is a first surface configured as a plane, and the light source causes the first It is preferable to irradiate one surface with ultraviolet rays.
- the first collection member can be reliably cleaned by the ultraviolet rays emitted from the light source.
- a second collecting member collects dust contained in the air sucked from the suction port on the downstream side of the first collecting member in the air flow direction. It is preferable that a collecting member is further provided, wherein the first collecting member and the second collecting member are filters, and the first collecting member has a coarser mesh than the second collecting member.
- the second collecting member in addition to the first collecting member, it is possible to reliably collect dust and the like contained in the air.
- the light source is arranged at a position away from the flow of air flowing from the suction port to the first collection member.
- a surface on the upstream side of the first collection member in the air flow direction is a first surface configured as a plane, and It is preferable that the light source irradiates the first collection member with ultraviolet rays in a state in which the line is inclined from the vertically downward direction to the light source side.
- the first collection member can be reliably cleaned by the ultraviolet rays emitted from the light source.
- the indoor unit of the air conditioner of the present disclosure further includes a generator that generates active species on the upstream side of the first collection member in the air flow direction.
- the ability to clean the inside of the casing can be further enhanced by providing the light source and the generator.
- FIG. 1 is a schematic configuration diagram of an air conditioner provided with an indoor unit of the present disclosure
- FIG. FIG. 2 is a perspective view showing an indoor unit of the air conditioner of the present disclosure
- the perspective view which shows the indoor unit of the state which removed the decorative panel.
- the bottom view which shows the indoor unit of the state which removed the decorative panel.
- FIG. 5 is a cross-sectional view taken along the line AA in FIG. 4;
- the perspective view which shows the indoor unit of the state which removed the decorative panel and the protective member.
- the bottom view which shows the indoor unit of the state which removed the decorative panel and the protective member.
- the perspective schematic diagram which shows a 1st filter and a 2nd filter.
- the partial expansion perspective view which shows an ultraviolet irradiation part and a limit switch.
- FIG. 4 is a partially enlarged perspective view showing the ultraviolet irradiation unit with the shielding member (second member) removed and the limit switch with the protective cover removed.
- FIG. 4 is a schematic partial cross-sectional view showing a state of ultraviolet irradiation by an ultraviolet irradiation unit; The perspective view which shows a shielding member (2nd member).
- FIG. 4 is a partially enlarged perspective view showing an active species generator; The perspective view which shows a protection member (a frame and a mesh body).
- 4A and 4B are schematic diagrams showing the operation of the limit switch;
- FIG. FIG. 4 is a schematic partial cross-sectional view showing a state of irradiation of ultraviolet rays by an ultraviolet irradiation unit (when the first filter is inclined and arranged);
- FIG. 1 is a schematic configuration diagram of an air conditioner provided with an indoor unit of the present disclosure.
- the air conditioner 10 shown in FIG. 1 is a device capable of cooling and heating an indoor space S1 constructed inside a building B by performing a vapor compression refrigeration cycle.
- the air conditioner 10 includes an indoor unit 11, which is an example of the indoor unit of the air conditioner according to the present disclosure.
- the air conditioner 10 further includes an outdoor unit 12 and refrigerant pipes 13 .
- the refrigerant pipe 13 includes a liquid pipe 13L and a gas pipe 13G.
- a refrigerant circuit is configured by connecting the indoor unit 11 and the outdoor unit 12 with refrigerant pipes 13 .
- the indoor unit 11 is arranged in the indoor space S1, and the outdoor unit 12 is arranged in the outdoor space S2.
- the outdoor space S2 in this description 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.
- the air conditioner 10 shown in FIG. 1 one indoor unit 11 is connected to one outdoor unit 12, but a plurality of indoor units 11 are connected to one outdoor unit 12.
- the air conditioner 10 that performs cooling and heating by circulating the refrigerant in the refrigerant circuit is illustrated, but the air conditioner according to the indoor unit of the present disclosure is not limited to this, and the heat source It may be an air conditioner that performs cooling and heating by circulating cold water and hot water supplied from the device, and the indoor unit may be a so-called fan coil unit.
- FIG. 2 is a perspective view showing the indoor unit of the air conditioner of the present disclosure.
- FIG. 3 is a perspective view showing the indoor unit with the decorative panel removed.
- FIG. 4 is a bottom view of the indoor unit with the decorative panel removed.
- 5 is a cross-sectional view taken along the line AA in FIG. 4.
- the indoor unit 11 has a so-called cassette type configuration and includes a casing 20 and a decorative panel 30 .
- the casing 20 has a substantially rectangular shape in bottom view, and is composed of a first casing 21 arranged on the upper side and a second casing 22 arranged on the lower side. contains.
- a space A for housing an indoor fan 25, a heat exchanger 26, a collecting member 40, an ultraviolet irradiation section 50, an active species generation section 60, etc., which will be described later. formed.
- the space A also serves as an air flow path within the casing 20 .
- a suction port 23 is formed in a rectangular central portion, and four air supply ports 24 are formed surrounding the suction port 23.
- the suction port 23 and the air supply port 24 are openings formed at the lower end of the space A (see FIG. 5).
- a protective member 71 which will be described later, is arranged in the suction port 23 .
- the lower end of the second casing 22 is covered with a decorative panel 30 (see FIG. 2).
- the decorative panel 30 has a substantially rectangular shape when viewed from the bottom.
- a blowout port 32 is provided.
- a slit-shaped opening 33 is formed in the intake grille 31 .
- the opening 33 communicates with the space A (see FIG. 5) through the suction port 23 (see FIG. 3).
- the blowout port 32 of the decorative panel 30 communicates with the space A (see FIG. 5) through the air supply port 24 (see FIG. 3).
- the indoor unit 11 sucks the air in the indoor space S1 (see FIG. 1) into the casing 20 through the intake grille 31 and the suction port 23, and the air sucked into the casing 20 through the air supply port 24 and the blowout port 32 into the indoor space.
- S1 is supplied with air.
- the indoor unit 11 includes an indoor fan 25 and a heat exchanger 26 inside the casing 20 (space A).
- 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 the refrigerant is circulated between the heat exchanger 26 and the outdoor unit 12 through the refrigerant pipe 13 .
- the indoor unit 11 sucks the air (return air RA) in the indoor space S1 into the casing 20 from the intake grille 31 (see FIG. 2) and the intake port 23 and passes through the heat exchanger 26.
- cooled or heated air supplied to the indoor space S1 from the air supply port 24 and the blowout port 32 (see FIG. 2).
- FIG. 6 is a perspective view showing the indoor unit with the decorative panel and the protective member removed.
- FIG. 7 is a bottom view showing the indoor unit with the decorative panel and the protective member removed.
- FIG. 8 is a schematic perspective view showing a collecting member.
- the indoor unit 11 has a collection 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.
- the collection member 40 includes a first filter 41 as the first collection member 40 and a second filter 42 as the second collection member 40 .
- the second filter 42 is a filter for collecting (finer) dust that the first filter 41 cannot collect. ⁇ 95%).
- the first filter 41 is coarser than the second filter 42 .
- the 2nd collection member 40 is a filter is illustrated in this embodiment, it may be an electric dust collector.
- the first filter 41 is arranged upstream of the second filter 42 in the direction of air flow.
- the surface of the first filter 41 on the upstream side in the air flow direction is referred to as a first surface 41a.
- the first filter 41 has a flat first surface 41a.
- the term “flat surface” as used herein means that the surface has no unevenness (pleats), etc., and that there is no shadowed part when the surface is irradiated with light from an oblique direction.
- the collection member 40 shown in this embodiment includes the first filter 41 and the second filter 42, the collection member in the indoor unit of the present disclosure may be only the first filter.
- the air (return air RA) sucked into the casing 20 from the suction grill 31 (see FIG. 2) and the suction port 23 passes through the collecting member 40 .
- dust contained in the return air RA is collected by the first filter 41 and the second filter 42 .
- dust that causes harmful components and odor components adheres to the first surface 41 a of the first filter 41 .
- FIG. 9 is a partially enlarged perspective view showing an ultraviolet irradiation section and limit switches.
- FIG. 10 is a partially enlarged perspective view showing the ultraviolet irradiation section with the shielding member (second member) removed and the limit switch with the protective cover removed.
- FIG. 11 is a schematic partial cross-sectional view showing the state of ultraviolet irradiation by the ultraviolet irradiation unit.
- FIG. 12 is a perspective view showing a shielding member (second member).
- the indoor unit 11 includes an ultraviolet irradiation section 50.
- the ultraviolet irradiation section 50 is a part for irradiating the first surface 41 a of the first filter 41 with ultraviolet rays, and includes a light source 51 and a shielding member 52 .
- the light source 51 includes an LED element that emits ultraviolet rays when energized.
- a lens (not shown) is attached to the light source 51, and the lens diffuses the ultraviolet rays emitted from the light source 51 over substantially the entire surface of the first surface 41a.
- the light source 51 shown in this embodiment is fixed to the casing 20 and irradiates the first surface 41a with ultraviolet rays from a fixed position. Alternatively, the first surface 41a may be irradiated with ultraviolet rays while the light source 51 is displaced by the displacement mechanism.
- the ultraviolet irradiation section 50 is arranged at a position away from the flow of air flowing from the suction port 23 toward the collecting member 40 .
- the ultraviolet irradiation section 50 is arranged at a position that does not overlap the suction port 23 and the collection member 40 in bottom view. If the ultraviolet irradiation section 50 is arranged in the flow of air flowing from the suction port 23 toward the collecting member 40, the ultraviolet irradiation section 50 causes an increase in airflow resistance.
- an increase in airflow resistance is suppressed by arranging the ultraviolet irradiation unit 50 at a position away from the flow of air flowing from the suction port 23 toward the collection member 40 .
- the ultraviolet irradiation section 50 has a shielding member 52.
- the shielding member 52 is a member for limiting the irradiation range of the ultraviolet rays emitted from the light source 51 .
- the shielding member 52 is composed of a first member 53 that supports the light source 51 from the casing 20 and a second member 54 that covers the light source 51 supported by the first member 53. It is The shield member 52 also serves as a member for supporting the light source 51 with respect to the casing 20 and is screwed to the casing 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 integral shielding member 52 .
- the shielding member 52 may be configured using a material other than metal (for example, resin).
- the first member 53 has an opening 53a for arranging the light source 51. As shown in FIG. 11, the first member 53 has an opening 53a for arranging the light source 51. As shown in FIG. The light source 51 is screwed to the first member 53 while being fitted in the opening 53a.
- the second member 54 has a box-shaped body portion 54a.
- the second member 54 and the first member 53 are used by arranging the first member 53 inside the body portion 54a and combining them.
- a space X surrounded by the main body portion 54a and the first member 53 is formed.
- the ultraviolet irradiation unit 50 arranges the light source 51 in the space X. As shown in FIG.
- the body portion 54a has an opening portion 54b. As shown in FIG. 11, the ultraviolet rays UV emitted from the light source 51 in the space X are irradiated to the space A outside the shielding member 52 through the opening 54b. In other words, of the ultraviolet rays UV emitted by the light source 51 in the space X, the ultraviolet rays UV directed in directions other than the opening 54b are blocked by the shielding member 52 .
- the body portion 54a further includes a collar portion 54c around the opening portion 54b. As a result, part of the ultraviolet rays UV passing through the opening 54b toward the space A is blocked by the collar 54c.
- the main body part 54a and the flange part 54c of the shielding member 52 are arranged between the light source 51 and the suction port 23, and shield the ultraviolet rays UV going to the suction port 23 among the ultraviolet rays UV going to the space A from the light source 51.
- the opening 54b and the flange 54c are arranged so that the shielding member 52 does not shield the ultraviolet rays UV from the light source 51 toward the first surface 41a of the first filter 41.
- the body portion 54a and the flange portion 54c are also arranged between the opening and the light source 51. preferably.
- the shielding member 52 is not limited to the configuration shown in this embodiment.
- the shielding member when the light source 51 is not accommodated in the space X and is arranged in the space A in an exposed state, the shielding member is formed in a plate-like shape (not having the space X) and placed on the upstream side of the light source 51. may be placed.
- the shielding member of the present disclosure may have a form capable of suppressing irradiation of the indoor space S1 with the ultraviolet rays emitted from the light source 51 .
- the indoor unit 11 has an active species generator 60 .
- the active species generator 60 is a part for supplying active species to the air passing through the casing 20, and includes a housing 63 in which a suction port 61 and a discharge port 62 are formed.
- the active species generating unit 60 has a discharge unit (not shown) provided with a needle electrode and a counter electrode inside a housing 63, and a type of plasma discharge is generated by applying a high voltage to the discharge unit. A streamer discharge is generated.
- the active species generator 60 generates active species with high oxidative decomposition power by generating streamer discharge.
- the active species generated by the active species generation unit 60 include high-speed electrons, ions, hydroxyl radicals, excited oxygen molecules, and the like. Decomposes harmful and odorous components.
- the active species generator 60 takes in part of the air in the casing 20 from the suction port 61 into the housing 63, and releases the active species generated by the discharge unit from the discharge port 62 together with the air. As shown in FIG. 13, the suction port 61 and the discharge port 62 are arranged upstream of the first filter 41 in the direction of air flow. Therefore, the active species generator 60 generates active species on the upstream side of the first filter 41 .
- the indoor unit 11 includes a light source 51 and an active species generator 60, and the first surface 41a of the first filter 41 can be cleaned (sterilized) with ultraviolet rays and further cleaned with active species. can. For this reason, the indoor unit 11 has a higher ability to clean the inside of the casing 20 than a conventional indoor unit having only an active species generator.
- the active species generating section 60 is arranged at a position facing the ultraviolet irradiation section 50 with the suction port 23 and the first filter 41 interposed therebetween. Such a configuration suppresses unevenness in the degree of cleanliness of the first surface 41a.
- the indoor unit 11 includes a protection section 70 for protecting the user from ultraviolet rays emitted from the ultraviolet irradiation section 50 .
- the protection section 70 includes a protection member 71 and limit switches 75 .
- FIG. 14 is a perspective view showing a protective member (frame and mesh body).
- the protection member 71 shown in FIGS. 3 to 5 is a member for preventing a part of the human body (especially a finger) from entering the ultraviolet radiation range inside the casing 20 .
- the protective member 71 covers the suction port 23 and prevents fingers from entering the space A (see FIG. 5) from the indoor space S1 side of the suction port 23 .
- the protective member 71 includes a frame 72 and a mesh body 73.
- the protection member 71 further includes stays 74 .
- the frame 72 is a member in which steel materials are assembled into a substantially rectangular shape, and has mounting holes 72a and protrusions 72b.
- the projecting portion 72b protrudes toward the upper surface side of the frame 72 (the side facing upward when attached to the casing 20).
- the mesh body 73 is attached to the lower surface side of the frame 72 (the side that is downward when attached to the casing 20).
- a pair of stays 74 are attached to the lower end of the second casing 22 .
- the protective member 71 is attached to the casing 20 by inserting the stay 74 into the attachment hole 72 a and hooking the frame 72 on the stay 74 .
- the frame 72 and the mesh body 73 are detachable from the casing 20.
- the frame 72 and the mesh body 73 are swingable with respect to the casing 20 with the contact portion between the frame 72 and the stay 74 as a fulcrum.
- the indoor unit 11 arranges the protective member 71 at a position covering the suction port 23 while the indoor space S1 is being air-conditioned.
- the indoor unit 11 arranges the protective member 71 at a position spaced apart from the suction port 23 when the air conditioning of the indoor space S ⁇ b>1 is stopped and the inside of the casing 20 is maintained.
- the protection member 71 is configured to be detachable from the casing 20 .
- the mesh body 73 is a member configured by assembling steel wires in a grid pattern, and has a first region 73a and a second region 73b. 3, 4 and 14, the first region 73a is shown surrounded by a thick solid line.
- the first region 73 a is a region of the mesh body 73 that is arranged in the vicinity of the ultraviolet irradiation section 50 .
- the second region 73b is a region of the mesh body 73 other than the first region 73a.
- the second region 73b is a region located farther from the ultraviolet irradiation section 50 than the first region 73a.
- the finger is irradiated with the ultraviolet rays emitted from the ultraviolet irradiation unit 50.
- This is an area where there is a possibility that Even if the user's finger (a part of the human body) is inserted into the casing 20 through the protective member 71, the second region 73b is exposed to the ultraviolet rays emitted from the ultraviolet irradiation unit 50 with respect to the finger. is an area where there is no possibility of being irradiated.
- the size of the mesh body 73 of the first region 73a is the first mesh size M1
- the size of the mesh body 73 of the second region 73b is the second mesh size M2.
- the mesh (lattice) formed on the protective member 71 is rectangular, and the size of the short side is called "mesh size”.
- the first mesh size M1 of the first region 73a is smaller than the second mesh size M2 of the second region 73b.
- the first region 73a of the present embodiment is configured by arranging steel wires with a wire diameter of 2 mm at a pitch of 9 mm on the short side, and the opening size on the short side is about 7 mm. That is, the first mesh size M1 of the first region 73a is a size that cannot insert a test finger having an outer diameter of ⁇ 8.5. Therefore, in the first region 73a, it is impossible for the user to insert his/her finger into the mesh gap.
- the protective member 71 can prevent the ultraviolet rays emitted from the ultraviolet irradiation section 50 from being emitted toward the human body.
- the second region 73b of the present embodiment is configured by arranging steel wires with a wire diameter of 2 mm at a pitch of 13.5 mm on the short side, and the opening size on the short side is about 11.5 mm. That is, the second mesh size M2 of the second region 73b is a size that allows insertion of a test finger having an outer diameter of ⁇ 8.5. In the indoor unit 11, the weight of the protective member 71 is reduced by limiting the range of the first region 73a.
- FIG. 15 is a schematic diagram showing the operation of limit switches.
- the limit switch 75 has a switch body 76 and a protective cover 77.
- the limit switch 75 is arranged inside the casing 20.
- the limit switch 75 is a device for preventing the human body from being irradiated with ultraviolet rays when the user removes the protective member 71 from the casing 20 .
- the protective cover 77 is formed with an opening 77a.
- the protrusion 72b (see FIG. 14) of the protective member 71 is inserted into the protective cover 77 through the opening 77a.
- the switch body 76 is arranged inside the protective cover 77 .
- the switch body 76 has a pressed portion 76a.
- the limit switch 75 is connected to a power supply circuit 80 that supplies power to the light source 51 .
- the limit switch 75 allows power to be supplied from the power supply circuit 80 to the light source 51 when the pressed portion 76a of the switch body 76 is pressed (see the lower diagram of FIG. 15). At this time, the light source 51 emits ultraviolet rays UV.
- the limit switch 75 cuts off the power supply from the power supply circuit 80 to the light source 51 when the pressed portion 76a is not pressed (see the upper diagram of FIG. 15). At this time, the light source 51 does not emit ultraviolet rays UV.
- the protective portion 70 allows the light source 51 to irradiate the ultraviolet rays by the limit switch 75 (see the lower diagram of FIG. 15).
- the limit switch 75 disables the ultraviolet irradiation from the light source 51 (see the upper diagram of FIG. 15).
- the limit switch 75 prevents the ultraviolet irradiation unit 50 from irradiating the human body with ultraviolet rays.
- FIG. 16 is a schematic partial cross-sectional view showing a situation of irradiation of ultraviolet rays by the ultraviolet irradiation section (when the first filter is arranged to be inclined).
- the first filter 41 is arranged with the normal line of the first surface 41a facing vertically downward (see FIG. 11). may be arranged so that the normal to is inclined with respect to the vertical direction.
- the first filter 41 is arranged such that the normal line L2 of the first surface 41a is inclined at an angle ⁇ toward the light source 51 with respect to the vertical line L1.
- the light source 51 irradiates the first surface 41a with ultraviolet rays.
- the normal line L2 of the first surface 41a is inclined at an angle ⁇ from the vertically downward direction toward the light source 51 side, and the first filter 41 is positioned from the light source 51 toward the first filter 41.
- the incident angle ⁇ of the ultraviolet rays UV to the first surface 41a becomes larger than when the filter 51 is arranged at a position away from the air flow, and the irradiation intensity Y2 of the ultraviolet rays to the first filter 41 can be improved. Therefore, in the indoor unit 11 shown in FIG. 16, it is possible to ensure sufficient irradiation intensity for cleaning the first surface 41a of the ultraviolet rays emitted from the light source 51, and the first filter 41 can be reliably cleaned. It becomes possible to It should be noted that the first filter 41 may be provided in a state of being always inclined at an angle ⁇ with respect to the casing 20, or may be configured to be inclined only when ultraviolet rays are emitted from the light source 51 using a mechanism (not shown). may
- the operation of the air conditioner 10 can be turned on and off by operating a remote controller (not shown) placed in the indoor space S1 or the like.
- the indoor unit 11 irradiates the first surface 41a of the first filter 41 with ultraviolet rays from the light source 51 for a predetermined time when the operation of the air conditioner 10 is started.
- the first filter 41 can be cleaned each time the operation is started without the user being conscious of the timing of ultraviolet irradiation.
- the indoor unit 11 may be configured to perform residual operation for a predetermined time when the operation of the air conditioner 10 is stopped, and to irradiate the first surface 41a of the first filter 41 with ultraviolet rays from the light source 51 during this residual operation. In this case, the user can clean the first filter 41 at the end of the operation without being conscious of the timing of ultraviolet irradiation, and the next operation can be started with the inside of the casing 20 cleaned. .
- the light source 51 employed 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 as the irradiation time increases, the irradiation time of one ultraviolet ray is increased. In this case, even if the cumulative operating time of the indoor unit 11 increases and the irradiation intensity of the light source 51 decreases, the first filter 41 can be reliably cleaned.
- the indoor unit 11 may limit the irradiation time of the light source 51 for one time. As a result, it is possible to prevent the light source 51 from reaching the end of its life before the indoor unit 11 reaches the end of its product life. As a result, even if the light source 51 is not replaced, the cleaning function of the first filter 41 by the ultraviolet irradiation section 50 can be maintained until the indoor unit 11 reaches the end of its product life.
- the indoor unit 11 shown in the above embodiment is the indoor unit 11 of the air conditioner 10 that air-conditions the indoor space S1, and is formed with the downward suction port 23 that opens toward the indoor space S1.
- an indoor fan 25 for sucking air in the indoor space S1 into the casing 20 from the suction port 23; 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 on the upstream side of the first filter 41 in the flow direction, and a shielding member 52 for shielding ultraviolet rays directed from the ultraviolet irradiation unit 50 toward the suction port 23 are provided.
- Such an indoor unit 11 can prevent the indoor space S1 from being irradiated with the ultraviolet rays emitted from the ultraviolet irradiation section 50 by the shielding member 52 . As a result, it is possible to provide the indoor unit 11 having a function of cleaning the first filter 41 with ultraviolet rays, and the ability to clean the interior of the casing 20 of the indoor unit 11 can be enhanced.
- the indoor unit 11 shown in the above embodiment further includes a mesh-like protective member 71 that covers the suction port 23 on the upstream side of the first filter 41 in the air flow direction.
- the first mesh size M1 in the first region 73a located in the periphery of the protective member 71 is larger than the second mesh size M2 in the second region 73b located farther from the light source 51 than the first region 73a of the protective member 71.
- the first mesh size M1 is too small to insert a test finger having an outer diameter of ⁇ 8.5.
- the first region 73 a of the protective member 71 can prevent the user from inserting his/her finger into the casing 20 . Thereby, it is possible to prevent the user's finger from being irradiated with the ultraviolet rays emitted from the light source 51 .
- the indoor unit 11 shown in the above embodiment has the protective member 71 detachably attached to the casing 20, and further includes a limit switch 75 that is turned on and off in conjunction with the attachment/detachment operation of the protective member 71. I have.
- the limit switch 75 enables irradiation of ultraviolet rays by the ultraviolet irradiation unit 50 when the protective member 71 is attached to the casing 20, and when the protective member 71 is detached from the casing 20, Irradiation of ultraviolet rays by the ultraviolet irradiation unit 50 is disabled.
- the surface on the upstream side of the first filter 41 in the direction of air flow is the first surface 41a configured as a plane.
- the light source 51 irradiates the first surface 41a with ultraviolet rays.
- the first filter 41 can be reliably cleaned by the ultraviolet rays irradiated from the ultraviolet irradiation section 50 .
- the indoor unit 11 shown in the above embodiment has a second filter that collects dust contained in the air sucked from the suction port 23 on the downstream side of the first filter 41 in the air flow direction. 42 are further provided.
- the first filter 41 in the indoor unit 11 has a coarser mesh than the second filter 42 .
- the ultraviolet irradiation section 50 is arranged at a position away from the flow of air flowing from the suction port 23 to the first filter 41 .
- the ultraviolet irradiation section 50 can prevent the ventilation resistance of the air flowing through the casing 20 from increasing.
- the normal line L2 of the first surface 41a is inclined at an angle ⁇ from the vertical line L1 toward the ultraviolet irradiation unit 50. irradiates the first filter 41 with ultraviolet rays.
- the ultraviolet irradiation section 50 in a configuration in which the ultraviolet irradiation section 50 is arranged at a position away from the air flow, it is possible to ensure the irradiation intensity of the ultraviolet rays irradiated from the ultraviolet irradiation section 50 to the first surface 41a. As a result, the first filter 41 can be reliably cleaned by the ultraviolet rays irradiated from the ultraviolet irradiation section 50 .
- the indoor unit 11 shown in the above embodiment further includes an active species generator 60 that generates active species on the upstream side of the first filter 41 in the air flow direction.
- the ability to clean the inside of the casing 20 can be further enhanced.
- Air conditioner 11 Indoor unit 20: Casing 23: Suction port 25: Indoor fan (fan) 41: first filter (first collection member) 41a: first surface 42: second filter (second collecting member) 50: UV irradiation section 51: Light source 52: Shielding member 60: Active species generation section (generation section) 71: Protective member 73a: First region 73b: Second region 75: Limit switch (switch) S1: Indoor space M1: First mesh size M2: Second mesh size
Abstract
Description
図1は、本開示の室内機を備えた空気調和装置の概略的な構成図である。図1に示す空気調和装置10は、蒸気圧縮式の冷凍サイクルを行うことによって、建物Bの内部に構築された室内空間S1の冷房及び暖房を行うことが可能な装置である。空気調和装置10は、本開示に係る空気調和装置の室内機の一例である室内機11を備えている。空気調和装置10は、さらに、室外機12及び冷媒配管13を備えている。冷媒配管13は、液管13L及びガス管13Gを含んでいる。空気調和装置10では、冷媒配管13によって室内機11及び室外機12を接続することで冷媒回路が構成されている。室内機11は、室内空間S1に配置されており、室外機12は、室外空間S2に配置されている。なお、本説明における室外空間S2には、建物B内における室内空間S1の外側の空間も含まれるが、本実施形態の室外機12は、室外空間S2のうちの建物Bの外部に配置されている。なお、図1に示す空気調和装置10では、1台の室外機12に対して1台の室内機11が接続されているが、複数の室内機11が1台の室外機12に対して接続されていてもよい。なお、本実施形態では、冷媒回路において冷媒を循環させて冷房及び暖房を行う空気調和装置10を例示しているが、本開示の室内機に係る空気調和装置は、これに限定されず、熱源装置から供給される冷水及び温水を循環させて冷房及び暖房を行う空気調和装置であってもよく、室内機は所謂ファンコイルユニットであってもよい。
図2は、本開示の空気調和装置の室内機を示す斜視図である。図3は、化粧パネルを外した状態の室内機を示す斜視図である。図4は、化粧パネルを外した状態の室内機を示す底面図である。図5は、図4におけるA-A線断面矢視図である。図1及び図2に示すように、室内機11は、所謂カセット型の形態を有しており、ケーシング20及び化粧パネル30を備えている。
図6は、化粧パネル及び保護部材を外した状態の室内機を示す斜視図である。図7は、化粧パネル及び保護部材を外した状態の室内機を示す底面図である。図8は、捕集部材を示す斜視模式図である。図6及び図7に示すように、室内機11は、ケーシング20の内部において、捕集部材40を備えている。捕集部材40は、室内空間S1の空気(還気RA)に含まれる塵埃を捕集するための部材である。図8に示すように、捕集部材40は、第1の捕集部材40である第1フィルタ41と、第2の捕集部材40である第2フィルタ42とを含んでいる。第2フィルタ42は、第1フィルタ41では捕集しきれない(より微細な)塵埃を捕集するためのフィルタであり、第1フィルタ41に比べて目が細かく、より高い捕集効率(60~95%程度)を有している。言い換えると、第1フィルタ41は、第2フィルタ42に比べて目が粗い。なお、本実施形態では、第2の捕集部材40がフィルタである場合を例示しているが、電気集塵器であってもよい。
図9は、紫外線照射部及びリミットスイッチを示す部分拡大斜視図である。図10は、遮蔽部材(第2部材)を外した状態の紫外線照射部及び保護カバーを外した状態のリミットスイッチを示す部分拡大斜視図である。図11は、紫外線照射部による紫外線の照射状況を示す概略的な部分断面図である。図12は、遮蔽部材(第2部材)を示す斜視図である。図5~図7、図9及び図10に示すように、室内機11は、紫外線照射部50を備えている。紫外線照射部50は、第1フィルタ41の第1面41aに紫外線を照射するための部位であり、光源51及び遮蔽部材52を備えている。光源51は、通電することによって紫外線を発するLED素子を備えている。光源51には図示しないレンズが装着されており、当該レンズによって、光源51で発せられた紫外線を第1面41aの略全面に拡散させる。なお、本実施形態で示した光源51は、ケーシング20に固定されており、第1面41aに対して定位置から紫外線を照射するが、光源51をケーシング20に対し変位させる変位機構をさらに備え、前記変位機構によって光源51を変位させながら第1面41aに対して紫外線を照射する構成としてもよい。
図6、図7及び図9~図11に示すように、紫外線照射部50は、遮蔽部材52を備えている。遮蔽部材52は、光源51から照射される紫外線の照射範囲を制限するための部材である。
図6、図7及び図13に示すように、室内機11は、活性種発生部60を備えている。活性種発生部60は、ケーシング20を通過する空気に対して活性種を供給するための部位であり、吸込口61及び放出口62が形成された筐体63を備えている。活性種発生部60は、筐体63の内部に針状電極と対向電極とを備えた放電部(図示省略)を有しており、前記放電部に高電圧を印加することによりプラズマ放電の一種であるストリーマ放電を発生させる。活性種発生部60は、ストリーマ放電を発生させることによって、酸化分解力の高い活性種を生成する。活性種発生部60で生成する活性種には、高速電子、イオン、水酸化ラジカル及び励起酸素分子などが含まれ、アンモニア類や、アルデヒド類、窒素酸化物等の小さな有機分子からなる空気中の有害成分や臭気成分を分解する。
図4に示すように、室内機11は、紫外線照射部50から照射される紫外線からユーザを保護するための保護部70を備えている。保護部70は、保護部材71及びリミットスイッチ75を含んでいる。
図14は、保護部材(フレーム及びメッシュ体)を示す斜視図である。図3~図5に示す保護部材71は、ケーシング20内における紫外線の照射範囲に、人体の一部(特に指)が侵入することを抑止するための部材である。保護部材71は、吸込口23を覆っており、吸込口23の室内空間S1側から空間A(図5参照)内への指の侵入を抑止する。図14に示すように、保護部材71は、フレーム72及びメッシュ体73を含んでいる。図3及び図4に示すように、保護部材71は、さらにステー74を含んでいる。
図15は、リミットスイッチの動作を示す概略的な模式図である。図9及び図10に示すように、リミットスイッチ75は、スイッチ本体76及び保護カバー77を備えている。図6、図7、図9及び図10に示すように、リミットスイッチ75は、ケーシング20の内部に配置されている。リミットスイッチ75は、ユーザがケーシング20から保護部材71を取り外した際に、紫外線が人体に照射されるのを抑止するための装置である。
図16は、紫外線照射部による紫外線の照射状況(第1フィルタを傾斜させて配置する場合)を示す概略的な部分断面図である。上記で説明した室内機11では、第1面41aの法線を鉛直下方に向けた姿勢で第1フィルタ41を配置している(図11参照)が、第1フィルタ41は、第1面41aの法線が鉛直方向に対して傾斜するように配置してもよい。図16に示す室内機11では、鉛直向きの線L1に対して第1面41aの法線L2を光源51側に角度θで傾斜させて第1フィルタ41を配置している。図16に示す室内機11では、この状態で、光源51から第1面41aに紫外線を照射する。
空気調和装置10は、室内空間S1等に配置されたリモコン(図示省略)の操作によって、運転を入り切りすることができる。室内機11は、空気調和装置10の運転開始時に、所定時間の間、光源51から第1フィルタ41の第1面41aに紫外線を照射する。これにより、ユーザが紫外線照射のタイミングを意識することなく、運転を開始する度に第1フィルタ41を清浄化することができる。室内機11は、空気調和装置10の運転停止時に、所定時間の残留運転を行い、この残留運転中に光源51から第1フィルタ41の第1面41aに紫外線を照射する構成としてもよい。この場合、ユーザが紫外線照射のタイミングを意識することなく、運転終了時に第1フィルタ41を清浄化することができ、ケーシング20内が清浄化された状態で次回運転を開始することが可能となる。
室内機11で採用している光源51は、照射時間の増大とともに、照射強度が低下する特性を有している。室内機11は、光源51の照射時間を記録する機能を有しており、照射時間の増大に伴って、1回の紫外線の照射時間を増大させるようにしている。この場合、室内機11の積算運転時間が大きくなり光源51の照射強度が低下した場合であっても、第1フィルタ41を確実に清浄化することができる。
(1)上記実施形態で示した室内機11は、室内空間S1の空気調和を行う空気調和装置10の室内機11であって、室内空間S1に向けて開口する下向きの吸込口23が形成されているケーシング20と、室内空間S1の空気を吸込口23からケーシング20の内部に吸い込む室内ファン25と、吸込口23から吸い込まれた空気に含まれる塵埃を捕集する第1フィルタ41と、空気の流れ方向における第1フィルタ41の上流側に紫外線を照射する紫外線照射部50と、紫外線照射部50から吸込口23に向かう紫外線を遮蔽する遮蔽部材52と、を備えている。
11 :室内機
20 :ケーシング
23 :吸込口
25 :室内ファン(ファン)
41 :第1フィルタ(第1捕集部材)
41a :第1面
42 :第2フィルタ(第2捕集部材)
50 :紫外線照射部
51 :光源
52 :遮蔽部材
60 :活性種発生部(発生部)
71 :保護部材
73a :第1領域
73b :第2領域
75 :リミットスイッチ(スイッチ)
S1 :室内空間
M1 :第1メッシュサイズ
M2 :第2メッシュサイズ
Claims (8)
- 室内空間(S1)の空気調和を行う空気調和装置(10)の室内機(11)であって、
前記室内空間(S1)に向けて開口する下向きの吸込口(23)が形成されているケーシング(20)と、
前記室内空間(S1)の空気を前記吸込口(23)から前記ケーシング(20)の内部に吸い込むファン(25)と、
前記吸込口(23)から吸い込まれた空気に含まれる塵埃を捕集する第1捕集部材(41)と、
空気の流れ方向における前記第1捕集部材(41)の上流側に紫外線を照射する光源(51)と、
前記光源(51)から前記吸込口(23)に向かう紫外線を遮蔽する遮蔽部材(52)と、
を備える、空気調和装置(10)の室内機(11)。 - 前記空気の流れ方向における前記第1捕集部材(41)の上流側で前記吸込口(23)を覆うメッシュ状の保護部材(71)をさらに備え、
前記保護部材(71)のうちの前記光源(51)の周辺に位置する第1領域(73a)における第1メッシュサイズ(M1)が、前記保護部材(71)のうちの前記第1領域(73a)よりも前記光源(51)に対して遠部に位置する第2領域(73b)における第2メッシュサイズ(M2)よりも小さく、
前記第1メッシュサイズ(M1)が、外径φ8.5のテストフィンガーを挿入不能な大きさである、請求項1に記載の空気調和装置(10)の室内機(11)。 - 前記保護部材(71)が前記ケーシング(20)に対して着脱可能に設けられており、
前記保護部材(71)の着脱操作に連動して入切されるスイッチ(75)をさらに備え、
前記スイッチ(75)が、
前記保護部材(71)が前記ケーシング(20)に装着されている場合に、前記光源(51)による紫外線の照射を可能とし、前記保護部材(71)が前記ケーシング(20)から離脱されている場合に、前記光源(51)による紫外線の照射を不能とする、請求項1又は請求項2に記載の空気調和装置(10)の室内機(11)。 - 前記空気の流れ方向における前記第1捕集部材(41)の上流側の面が、平面で構成された第1面(41a)であり、
前記光源(51)によって、前記第1面(41a)に紫外線が照射される、請求項1から請求項3の何れか一項に記載の空気調和装置(10)の室内機(11)。 - 前記空気の流れ方向における前記第1捕集部材(41)の下流側において、前記吸込口(23)から吸い込まれた空気に含まれる塵埃を捕集する第2捕集部材(42)をさらに備え、
前記第1捕集部材(41)及び前記第2捕集部材(42)は、フィルタであり、
前記第1捕集部材(41)は、前記第2捕集部材(42)よりも目が粗い、請求項1から請求項4の何れか一項に記載の空気調和装置(10)の室内機(11)。 - 前記光源(51)が、前記吸込口(23)から前記第1捕集部材(41)に流れる空気の流れから外れた位置に配置されている、請求項1から請求項5の何れか一項に記載の空気調和装置(10)の室内機(11)。
- 前記空気の流れ方向における前記第1捕集部材(41)の上流側の面が、平面で構成された第1面(41a)であり、
前記第1面(41a)の法線(L2)が鉛直下方から前記光源(51)側に傾斜している状態で、前記光源(51)によって前記第1捕集部材(41)に紫外線が照射される、請求項6に記載の空気調和装置(10)の室内機(11)。 - 前記空気の流れ方向における前記第1捕集部材(41)の上流側で活性種を発生させる発生部(60)をさらに備える、請求項1から請求項7の何れか一項に記載の空気調和装置(10)の室内機(11)。
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