JP2021069843A - Sterilization and deodorization device and garbage box - Google Patents

Abstract

To perform sterilization and deodorization conveniently and continuously.SOLUTION: A sterilization and deodorization device 20 has a photocatalyst member 24 provided apart from a substrate 22, a first LED 26 that is provided at a position overlapping the photocatalyst member 24 on the substrate 22 and outputs first ultraviolet light UV1 with a wavelength of 300 nm or more and 400 nm or less to the photocatalyst member 24, and a second LED 28 that is provided at a position not overlapping the photocatalyst member 24 on the substrate 22 and outputs second ultraviolet light UV2 with a wavelength of 200 nm or more and less than 300 nm.SELECTED DRAWING: Figure 3

Description

The present invention relates to a sterilization deodorizer and a trash can.

If you put waste such as kitchen waste and used diapers in the trash can, bad odors and germs will be generated. Offensive odors may be taken by attaching a deodorant to the trash can or spraying a deodorant spray on the waste in the trash can. Further, there is also known a trash can in which an ultraviolet lamp is attached to the inside of the lid of the trash can to sterilize and deodorize the waste by irradiating the waste with ultraviolet rays (see, for example, Patent Document 1).

Utility Model Registration No. 3168998

When a deodorant or deodorant spray is used, the effect is temporary, and it is necessary to replace the deodorant at each replacement time or spray the spray each time, which is laborious. In the case of a device that irradiates ultraviolet rays, it can be expected to have an effect of preventing the generation of germs that cause bad odors, but it is difficult to expect an effect of removing the bad odors themselves.

The present invention has been made in view of these problems, and an object of the present invention is to provide an apparatus capable of sterilizing and deodorizing easily and continuously.

The sterilization and deodorizing device according to an aspect of the present invention is provided at a position where the photocatalyst member provided apart from the substrate and the photocatalyst member on the substrate overlap, and emits first ultraviolet light having a wavelength of 300 nm or more and 400 nm or less toward the photocatalyst member. It includes a first LED that outputs light, and a second LED that is provided at a position not overlapping the photocatalyst member on the substrate and outputs second ultraviolet light having a wavelength of 200 nm or more and less than 300 nm.

According to this aspect, the photocatalyst can be activated by irradiating the photocatalyst member with first ultraviolet light having a wavelength of 300 nm or more and 400 nm or less, and organic substances that cause malodor can be decomposed and deodorized. Further, by irradiating the second ultraviolet light having a wavelength of 200 nm or more and less than 300 nm from a position where it does not overlap with the photocatalyst member, the portion irradiated with the second ultraviolet light can be sterilized. As a result, it is possible to prevent various germs such as mold from propagating and generating a foul odor.

The sterilization and deodorizing device may be mounted inside a trash can with a lid. The sterilization and deodorizing device further includes a detection unit that detects whether or not the lid of the trash can with a lid is in the closed state, and a control unit that turns off the second LED when the detection unit does not detect the closed state of the lid. May be good.

The control unit may turn on the first LED when the detection unit detects the closed state of the lid, and may turn on the second LED when the detection unit continuously detects the closed state of the lid for a predetermined time.

Another aspect of the present invention is a trash can. The trash can may include a container, a lid for closing the opening of the container, and a sterilizing and deodorizing device attached to the inside of the container or inside the lid.

According to the present invention, it is possible to provide an apparatus capable of sterilizing and deodorizing easily and continuously.

It is a perspective view which shows typically the structure of the trash can which concerns on embodiment. It is a top view which shows typically the structure of the sterilization deodorizing apparatus. It is sectional drawing which shows typically the structure of the sterilization deodorizing apparatus. It is a timing chart which shows the operation example of the sterilization deodorizing apparatus.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the description, the same elements are designated by the same reference numerals, and duplicate description will be omitted as appropriate. Further, in order to help understanding the explanation, the dimensional ratio of each component in each drawing does not necessarily match the dimensional ratio of the actual light emitting element.

FIG. 1 is a perspective view schematically showing the configuration of the trash can 10 according to the embodiment. The trash can 10 includes a container 12, a lid 16, and a sterilization / deodorizing device 20. The trash can 10 is a so-called trash can with a lid, and is provided with a lid 16 for closing the opening 14 of the container 12 for accommodating waste. The lid 16 is attached to the upper part of the container 12 via the hinge 18. By rotating the hinge 18, the lid 16 can be displaced with respect to the container 12 between the closed state in which the opening 14 of the container 12 is closed and the open state in which the opening 14 of the container 12 is opened. FIG. 1 shows the lid 16 in the open state.

The sterilization and deodorizing device 20 is attached to the inside of the lid 16. The sterilization and deodorizing device 20 sterilizes and deodorizes the inside of the trash can 10 in which waste is stored. The sterilization and deodorizing device 20 decomposes and deodorizes organic substances that cause malodor generated from the waste contained in the container 12 by photocatalytic action. Further, the sterilization / deodorizing device 20 irradiates the waste contained in the container 12 with ultraviolet light to sterilize the waste, and prevents the generation of foul odor due to the decay of the waste due to the growth of mold and the like.

FIG. 2 is a top view schematically showing the configuration of the sterilization / deodorizing device 20. FIG. 3 is a cross-sectional view schematically showing the configuration of the sterilization / deodorizing device 20. FIG. 3 shows a sterilization and deodorizing device 20 attached to the inside of the closed lid 16. The sterilization and deodorizing device 20 includes a substrate 22, a photocatalyst member 24, a first LED (Light Emitting Diode) 26, a second LED 28, a power supply unit 30, a detection unit 32, and a control unit 34.

The substrate 22 is a printed circuit board or the like, and has a mounting surface 22a and a mounting surface 22b on the opposite side of the mounting surface 22a. A photocatalyst member 24, a first LED 26, and a second LED 28 are provided on the mounting surface 22a. The mounting surface 22b is mounted with respect to the inner surface 16a of the lid 16. The mounting surface 22b is fixed to the inner surface 16a of the lid 16 with double-sided adhesive tape or the like. The substrate 22 is not directly attached to the inner surface 16a of the lid 16, but the sterilization and deodorizing device 20 may be fixed to the lid 16 via a housing (not shown) accommodating the sterilizing and deodorizing device 20.

The photocatalytic member 24 contains a material having a photocatalytic action such as _{titanium dioxide (TiO 2).} The photocatalyst member 24 is composed of, for example, a sheet-like or plate-like base material such as a non-woven fabric or a porous ceramic, and TiO ₂ supported on the base material. The photocatalyst member 24 is provided apart from the mounting surface 22a of the substrate 22. A columnar spacer 36 is provided between the substrate 22 and the photocatalyst member 24, and the photocatalyst member 24 is fixed to the substrate 22 by the spacer 36. A cavity serving as an air passage is provided between the substrate 22 and the photocatalyst member 24.

The first LED 26 outputs the first ultraviolet light UV1 for activating the photocatalyst member 24. The wavelength of the first ultraviolet light UV1 is 300 nm or more and 400 nm or less. As the first LED 26, for example, an LED having a center wavelength or a peak wavelength of about 385 nm can be used. The first LED 26 is provided at a position overlapping the photocatalyst member 24 on the mounting surface 22a of the substrate 22, and is arranged so as to irradiate the first ultraviolet light toward the photocatalyst member 24.

The second LED 28 outputs a second ultraviolet light UV2 for sterilizing the irradiation target. The wavelength of the second ultraviolet light UV2 is 200 nm or more and less than 300 nm. As the second LED 28, for example, an LED having a center wavelength or a peak wavelength of about 260 nm to 285 nm can be used. The second LED 28 is provided at a position on the mounting surface 22a of the substrate 22 so as not to overlap with the photocatalyst member 24, and is arranged so as to irradiate the second ultraviolet light toward the inside 12a of the container 12.

In the example shown in FIG. 2, one second LED 28 is arranged near the center of the mounting surface 22a of the substrate 22, and a plurality of first LEDs 26 are arranged around the second LED 28. Further, the photocatalyst member 24 is arranged at a position where it overlaps with the plurality of first LEDs 26, and is arranged so as to block the first ultraviolet light UV1 output from the plurality of first LEDs 26. An opening 24a is provided in the central portion of the photocatalyst member 24, and is arranged so as not to block the second ultraviolet light UV2 output from the second LED 28.

The power supply unit 30 supplies electric power for lighting the first LED 26 and the second LED 28. The power supply unit 30 is provided on the mounting surface 22a of the board 22. The power supply unit 30 includes, for example, a primary battery and a secondary battery. The power supply unit 30 may be configured to receive power from a commercial power source such as AC 100V. The power supply unit 30 does not have to be provided on the substrate 22, and may be configured as a separate body from the sterilization / deodorizing device 20. The power supply unit 30 may be arranged outside the trash can 10.

The detection unit 32 detects whether or not the lid 16 is in the closed state. The detection unit 32 is provided on the mounting surface 22a of the substrate 22 and is configured to detect the orientation of the lid 16. The detection unit 32 is, for example, an inclination sensor composed of MEMS (Micro Electro Mechanical Systems) or the like, and detects the orientation of the lid 16 by detecting the inclination angle of the substrate 22. The detection unit 32 detects that the lid 16 is in the closed state when the lid 16 is horizontal, and detects that the lid 16 is not in the closed state when the lid 16 is not horizontal. The detection unit 32 may be provided on the substrate 22, or may be provided on the hinge 18 or the like of the trash can 10. The detection unit 32 may detect whether or not the lid 16 is in the closed state by detecting the rotation angle of the hinge 18. When the lid 16 is provided with a locking mechanism, the detection unit 32 may detect whether or not the lid 16 is locked with respect to the container 12. The detection unit 32 may detect that the lid 16 is in the closed state when the lid 16 is locked.

The control unit 34 controls the lighting of the first LED 26 and the second LED 28 according to the detection result of the detection unit 32. The control unit 34 includes an integrated circuit such as an MCU (Micro Controller Unit). The control unit 34 enables the first LED 26 and the second LED 28 to be turned on when the detection unit 32 detects the closed state of the lid 16. When the detection unit 32 does not detect the closed state of the lid 16, the control unit 34 disables the lighting of the first LED 26 and the second LED 28. The control unit 34 makes it possible to turn on the first LED 26 and the second LED 28 only when the lid 16 is closed, thereby preventing ultraviolet light from leaking to the outside of the trash can 10.

When the detection unit 32 detects the closed state of the lid 16, the control unit 34 may intermittently turn on at least one of the first LED 26 and the second LED 28. The control unit 34 may turn on at least one of the first LED 26 and the second LED 28 at predetermined time intervals when the lid 16 continues to be closed. For example, every 5 minutes, every 10 minutes, every 30 minutes, or every hour, at least one of the first LED 26 and the second LED 28 is turned on for 10 seconds, 30 seconds, 1 minute, and 5 minutes, and the remaining time is turned off. May be good.

The control unit 34 may be able to light at least one of the first LED 26 and the second LED 28 only when the closed state of the lid 16 detected by the detection unit 32 continues for a predetermined time. For example, at least one of the first LED 26 and the second LED 28 may be turned on only when the lid 16 is closed for 1 minute, 5 minutes, or 10 minutes. When the lid 16 is opened before the predetermined time continues after the lid 16 is closed, the control unit 34 keeps the lid 16 closed for a predetermined time after the lid 16 is closed. At least one of the first LED 26 and the second LED 28 may be turned on only when it is maintained. This may prevent the lid 16 from being opened while the first LED 26 or the second LED 28 remains on when the lid 16 is repeatedly opened and closed when the trash can 10 is used.

FIG. 4 is a timing chart showing an operation example of the sterilization / deodorizing device 20. FIG. 4 shows a first period 41 in which the lid 16 of the trash can 10 is maintained in a closed state, a second period 42 in which the lid 16 of the trash can 10 is repeatedly opened and closed, and a closed state of the lid 16 of the trash can 10 is maintained. The third period 43 is shown. The first period 41 and the third period 43 correspond to non-use periods in which the trash can 10 is not used and the lid 16 continues to be closed. The second period 42 corresponds to a usage period in which the lid 16 is repeatedly opened and closed in order to put the waste in the trash can 10 and take out the waste from the trash can 10.

In the timing chart of FIG. 4, when the lid 16 is in the closed state, the first LED 26 is continuously lit, while the second LED 28 is intermittently lit. When the lid 16 changes from the open state to the closed state, the first LED 26 is turned on immediately after the lid 16 is closed, while the second LED 28 is turned on until a predetermined time elapses after the lid 16 is closed. I keep it off.

The detection unit 32 detects whether or not the lid 16 is in the closed state. When the lid 16 is in the closed state, the control unit 34 turns on the first LED 26 so that the photocatalyst member 24 is irradiated with the first ultraviolet light UV1. The photocatalyst member 24 is activated by the first ultraviolet light UV1 and decomposes organic substances existing inside the trash can 10 that cause a foul odor by photocatalytic action. The photocatalyst member 24 decomposes and deodorizes organic substances staying in the vicinity of the inner surface 16a of the lid 16.

The control unit 34 intermittently lights the second LED 28 when the lid 16 continues to be closed. The lighting time t1 of the second LED 28 is, for example, 10 seconds, 30 seconds, 1 minute or 5 minutes, and the time cycle t2 for relighting the second LED 28 is, for example, 5 minutes, 10 minutes, 30 minutes or 1 hour. The second ultraviolet light UV2 output from the second LED 28 irradiates the surface of the waste contained in the inside 12a of the container 12 to sterilize the surface of the waste. This prevents the growth of mold and the like on the surface of the waste, and prevents the generation of foul odors due to the decay of the waste.

When the lid 16 is not in the closed state, the control unit 34 turns off the first LED 26 and the second LED 28 to turn them off. When the lid 16 is repeatedly opened and closed in the second period 42, the control unit 34 turns on the first LED 26 and turns it on when the lid 16 is temporarily closed. When the lid 16 is opened and closed, the air inside the trash can 10 moves, so that a bad odor tends to rise from the bottom of the trash can 10. Under such circumstances, by turning on the first LED 26 and activating the photocatalyst member 24, the malodor can be decomposed and removed.

When the lid 16 is repeatedly opened and closed in the second period 42, the control unit 34 keeps the second LED 28 turned off when the lid 16 is temporarily closed. Since the sterilization treatment by the second ultraviolet light UV2 has a poor ability to remove the generated malodor, it is difficult to prevent the malodor even if the second ultraviolet light UV2 is irradiated when the lid 16 is repeatedly opened and closed. Further, since the second ultraviolet light UV2 having a short wavelength has a large influence on the human body, it is preferable that the second LED 28 is surely turned off when the lid 16 is opened. Therefore, the control unit 34 keeps the second LED 28 off when the lid 16 is repeatedly opened and closed so that the second ultraviolet light UV2 does not leak to the outside of the trash can 10 during the period of use of the trash can 10.

The control unit 34 turns on the second LED 28 when the closed state of the lid 16 continues for a predetermined time in the third period 43. The predetermined time t3 from when the lid 16 is closed to when the second LED 28 is turned on is, for example, 5 minutes, 10 minutes, 30 minutes, or 1 hour. By turning on the second LED 28 after the lid 16 has been closed for a predetermined time, it is possible to prevent the second LED 28 from being turned on when the lid 16 is temporarily closed during the period of use of the trash can 10. it can.

According to the present embodiment, the first LED 26 that outputs the first ultraviolet light UV1 having a wavelength of 300 nm or more and the second LED 28 that outputs the second ultraviolet light UV2 having a wavelength of less than 300 nm are combined to deodorize using a photocatalytic action. It is possible to enhance the performance of both the function and the sterilization function by ultraviolet light irradiation. For example, when a germicidal lamp that outputs a germicidal line having a wavelength of around 254 nm is used, the function of activating the photocatalyst and deodorizing it is poor because it contains almost no wavelength component having a wavelength of 300 nm or more. On the other hand, when a black light that outputs ultraviolet light having a wavelength of 300 nm to 400 nm is used, it lacks the function of sterilizing the irradiation target because it contains almost no wavelength component having a wavelength of less than 300 nm. On the other hand, in the present embodiment, by combining two types of LEDs having different wavelengths, it is possible to output ultraviolet light suitable for each of activation of the photocatalyst and ultraviolet sterilization, and both the deodorizing function and the sterilizing function are enhanced. Performance can be improved. This not only removes the malodor generated from the waste, but also prevents the generation of the malodor due to the putrefaction of the waste. As a result, the inside of the trash can can be effectively deodorized and deodorized.

According to the present embodiment, when the lid 16 of the trash can 10 is in the open state, both the first LED 26 and the second LED 28 are turned off to prevent ultraviolet light from leaking to the outside of the trash can 10 and to prevent the device from leaking. It can increase safety. Further, by not turning on the second LED 28 that outputs the second ultraviolet light UV2 having a wavelength of 300 nm or less when the lid 16 is repeatedly opened and closed, the second ultraviolet light UV2 is outside the trash can 10 when the trash can 10 is used. It is possible to prevent it from leaking to the surface more effectively. Thereby, the safety of the device can be further enhanced.

The present invention has been described above based on examples. It will be appreciated by those skilled in the art that the present invention is not limited to the above-described embodiment, various design changes are possible, various modifications are possible, and such modifications are also within the scope of the present invention. It is about to be understood.

In the above-described embodiment, a case where a plurality of first LEDs 26 and one second LED 28 are combined is shown. In another embodiment, the number of the first LED 26 and the second LED 28 may be arbitrary, the number of the first LED 26 and the second LED 28 may be the same, or the number of the second LED 28 may be larger than that of the first LED 26. Good. Further, the first LED 26 may be arranged in the central portion of the substrate 22, and the second LED 28 may be arranged in the peripheral portion of the substrate.

In the above-described embodiment, the case where both the first LED 26 and the second LED 28 are turned off when the lid 16 is in the open state is shown. In another embodiment, the first LED 26 may be turned on when the lid 16 is in the open state.

In the above-described embodiment, the case where the sterilization / deodorizing device 20 is attached to the inner surface 16a of the lid 16 is shown. In another embodiment, the sterilization / deodorizing device 20 may be attached to the inner surface of the container 12, for example, the sterilizing / deodorizing device 20 may be attached to the bottom of the container 12.

The sterilization / deodorizing device 20 may be manufactured and sold as an accessory of the trash can 10, or may be manufactured and sold as a separate item from the container 12 and the lid 16 of the trash can 10. In the latter case, the sterilization / deodorizing device 20 may be retrofitted to the existing trash can with a lid.

The form of the trash can to which the sterilization / deodorizing device 20 is attached is not particularly limited. In the above embodiment, the lid 16 is fixed to the container 12 via the hinge 18, but the trash can lid does not have to be attached to the container so that the lid is placed over the opening of the container. The sterilization / deodorizing device 20 may be applied to the trash can configured in. Further, the lid of the trash can may be provided on the side of the container instead of the upper part of the container, and the lid of the trash can may be configured like a door. In this case, the sterilization / deodorizing device 20 may be attached to the ceiling inside the container of the trash can.

10 ... Trash can, 12 ... Container, 14 ... Aperture, 16 ... Lid, 20 ... Sterilization deodorizer, 22 ... Substrate, 24 ... Photocatalyst member, 26 ... 1st LED, 28 ... 2nd LED, 30 ... Power supply unit, 32 ... Detection unit , 34 ... Control unit.

Claims (4)

A photocatalyst member provided apart from the substrate and
A first LED provided on the substrate at a position overlapping the photocatalyst member and outputting first ultraviolet light having a wavelength of 300 nm or more and 400 nm or less toward the photocatalyst member.
A sterilization and deodorizing apparatus provided on the substrate at a position not overlapping with the photocatalyst member, and comprising a second LED that outputs second ultraviolet light having a wavelength of 200 nm or more and less than 300 nm. The sterilization and deodorizing device is attached to the inside of a trash can with a lid.
A detection unit that detects whether or not the lid of the trash can with a lid is closed, and
The sterilization and deodorizing device according to claim 1, further comprising a control unit for turning off the second LED when the detection unit does not detect the closed state of the lid. The control unit lights the first LED when the detection unit detects the closed state of the lid, and the second LED when the detection unit continuously detects the closed state of the lid for a predetermined time. The sterilization and deodorizing apparatus according to claim 2, wherein the lid is turned on. With the container
A lid for closing the opening of the container and
A trash can comprising the sterilization and deodorizing device according to any one of claims 1 to 3, which is attached to the inside of the container or the inside of the lid.

Images