JP7571573B2 - Ultraviolet Therapy Device - Google Patents

Description

The present invention relates to an ultraviolet light therapy device that treats skin diseases by irradiating them with ultraviolet light.

Conventionally, phototherapy has involved ultraviolet light therapy using ultraviolet light in wavelength ranges such as UVA (wavelength 320 nm to 400 nm) and UVB (wavelength 280 to 320 nm). Ultraviolet light therapy is a therapy that achieves therapeutic effects by suppressing the immune system through ultraviolet light irradiation.
For example, Patent Document 1 discloses an ultraviolet treatment device that uses an LED as an ultraviolet light source. This ultraviolet treatment device is equipped with a heat sink for cooling the light source, and the light source is cooled by blowing cooling air onto the heat sink. However, the ultraviolet treatment device does not disclose a specific structure for sucking the cooling air into the housing and exhausting it to the outside of the housing.

For example, Patent Document 2 discloses a light irradiation device that has a cooling fan that sucks in air heated by heat generated in the light source to cool the light source, and expels warm air exhausted from the cooling fan from a light irradiation port.
Furthermore, for example, Patent Document 3 discloses a light-irradiating cosmetic device in which cooling air for cooling a light source is taken in from the front of the light-emitting head, cools the internal light source, and is exhausted from the main body in the direction of the user.

JP 2020-49142 A JP 2013-106876 A JP 2018-33923 A

In the techniques described in Patent Documents 2 and 3, cooling air for cooling the light source inside the device is exhausted toward the user or patient.
However, in the case of an ultraviolet treatment device in which cooling air is exhausted toward a patient undergoing treatment, the cooling air hits the patient, causing the patient to feel uncomfortable. Also, depending on the temperature of the exhausted air, there is a risk of burns on the part of the patient that the air hits.
Furthermore, in the case of an ultraviolet treatment device having a structure in which cooling air is exhausted toward a user (e.g., a doctor), there is a risk that treatment may be hindered.

Therefore, the present invention aims to provide an ultraviolet light therapy device that can prevent cooling air from hitting the user or patient.

In order to solve the above problems, one aspect of the ultraviolet therapy device of the present invention is an ultraviolet therapy device including a light source unit that irradiates therapeutic light including ultraviolet light onto an affected area, the light source unit including a housing, a light source disposed inside the housing and radiating the ultraviolet light, a window member disposed at the front end of the housing and radiating the therapeutic light, an intake fan that takes in cooling air into the housing, an exhaust port disposed at the bottom of the housing on the opposite side of the window member from the light source, and an exhaust fan that exhausts the cooling air from inside the housing through the exhaust port , wherein an intake direction in which the intake fan takes in cooling air into the housing and an exhaust direction in which the exhaust fan exhausts the cooling air from inside the housing through the exhaust port intersect .
In this way, the cooling air is exhausted from the rear bottom of the housing, so it is possible to prevent the cooling air from hitting the user or patient, which in turn prevents the treatment by the user, such as a doctor, from being hindered, and prevents the patient from feeling uncomfortable during treatment.
In addition, the structure can be designed to make it difficult for hot air exhausted from the housing to be drawn in, thereby preventing a decrease in the cooling effect.

Furthermore, in the above-mentioned ultraviolet treatment device, the light source unit may further include an air intake port provided on the opposite side of the front end portion of the housing where the window member is provided, and the air intake fan may take in cooling air from the air intake port into the inside of the housing.
In this case, since the cooling air is taken in from the rear of the housing, the patient in front of the window member does not feel that the cooling air is flowing. Also, since the intake direction and the exhaust direction differ by 90 degrees, it is possible to make it more difficult to take in the warm air exhausted from the housing.

In the ultraviolet therapy device, the intake fan may be disposed on the side of the light source in a plane parallel to the window member, and may blow cooling air toward the light source. In this case, heat generated by the light source can be appropriately dissipated.
Furthermore, in the ultraviolet treatment device, the intake fans may be disposed on both sides of the light source on a plane parallel to the window member, sandwiching the light source therebetween. In this case, the heat generated by the light source can be dissipated more efficiently. Also, uneven cooling of the light source can be reduced.

In addition, in the above-mentioned ultraviolet therapy device, the light source unit is arranged opposite the window member and includes a board on which the light source is mounted, and a heat sink attached to the surface of the board opposite the window member and dissipating heat from the board, and the intake fan blows cooling air taken into the inside of the housing to the side of the heat sink, and the heat sink may be provided with fins extending in the direction in which the cooling air is blown by the intake fan.
In this case, the heat generated by the light source and transferred to the substrate can be efficiently dissipated by the heat sink, and the light source can be appropriately cooled.

Furthermore, in the above ultraviolet treatment device, the light source may be an LED. In this case, it is possible to reduce the size and weight of the device.

The present invention makes it possible to prevent cooling air from reaching the user or patient.

1 is a diagram showing an overall configuration of an example of an ultraviolet ray treatment device according to an embodiment of the present invention; FIG. 2 is a diagram illustrating an example of the appearance of a light source unit. 4 is a cross-sectional view showing a specific example of the configuration of a light source unit. FIG. 4 is a cross-sectional view showing a specific example of the configuration of a light source unit. FIG. FIG. 4 is a perspective view showing a specific configuration example of a light source unit. FIG. 4 is a perspective view showing a specific configuration example of a light source unit. FIG. 4 is a diagram illustrating the flow of cooling air. FIG. 4 is a diagram illustrating the flow of cooling air. FIG. 2 is a diagram showing a state in which an attachment is attached to a light source unit.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram showing an overall configuration of an example of an ultraviolet ray treatment device 10 according to the present embodiment.
This ultraviolet light therapy device 10 is a device for treating skin diseases, which performs UVA1 therapy by irradiating an affected area with therapeutic light having a spectrum in the UVA1 region.
UVA1 therapy is a treatment that uses ultraviolet rays of 340 nm to 400 nm, and is characterized by its ability to reach deeper into the skin compared to treatments that use ultraviolet rays in the UV-B region. Therefore, it is effective against diseases that have their etiology in the dermis, and is known to be highly effective against atopy, prurigo, and scleroderma.
In this embodiment, a case will be described in which the ultraviolet light therapy device 10 is a therapy device for treating scleroderma.

1, the ultraviolet ray treatment device 10 includes a light source unit 20 and a control unit 30 that controls the light source unit 20. The light source unit 20 and the control unit 30 are supported by a support body 11.
The support body 11 includes a platform 12 supported on a floor surface via wheels 18, a support column 13 extending upward from the center of the platform 12, and an operating arm 14 that supports a light source unit 20 at the upper end of the support column 13 so that the light source unit 20 can swing freely relative to the support column 13. In the support body 11, the light source unit 20 is attached to the tip of the operating arm 14. The light source unit 20 is configured to be capable of tilt rotation about a rotation axis 27e provided in the horizontal direction.

The control unit 30 is attached to, for example, the center of the support 13 by a fixing member (not shown).
The control unit 30 includes, for example, a rectangular parallelepiped housing 37 and a graphic operation panel 39 provided on a side of the housing 37. The graphic operation panel 39 can be operated by an operator of the ultraviolet treatment device 10 (for example, a doctor).

FIG. 2 is a diagram showing an example of the external appearance of the light source unit 20. As shown in FIG.
2, the light source unit 20 includes a housing 27 and a rectangular window member 28 provided at the front end of the housing 27, and emits therapeutic light from the window member 28. The window member 28 is a light irradiation window for irradiating the therapeutic light to an affected area of a patient.
As shown in FIG. 1, the light source unit 20 may be provided with a manual lever 19 for manually swinging the light source unit 20 .

3 and 4 are cross-sectional views showing a specific configuration of the light source section 20. Here, Fig. 3 is a cross-sectional view of the light source section 20 as viewed from above, and Fig. 4 is a cross-sectional view of the light source section 20 as viewed from the side.
3 and 4, the light source section 20 includes a light source unit 21 disposed in a storage section 27a formed inside a housing 27. The light source unit 21 is disposed in the storage section 27a so as to face a window member 28. The window member 28 is disposed so as to close an opening 29 at a front end of the storage section 27a.

The light source unit 21 includes a plurality of LED elements 22a as light sources. The plurality of LED elements 22a are mounted on, for example, a rectangular flat LED board 22b. For example, the plurality of LED elements 22a can be arranged in a lattice shape on the LED board 22b, arranged vertically and horizontally at a predetermined interval. For example, when 64 LED elements 22a are used, the LED elements 22a can be arranged in a lattice shape of 8×8 vertically and horizontally. Note that the number and arrangement of the LED elements 22a are not limited to the above.
Furthermore, the light source unit 20 may include a reflector 27b on the inner surface of the housing 27a, which reflects the light emitted from the LED element 22a. One end of the reflector 27b is connected to the outer edge of the LED board 22b, and the other end of the reflector 27b is connected to the outer edge of the window member 28, and the reflector 27b forms a light guide path that guides the light emitted from the LED element 22a to the window member 28. Note that the inner surface of the housing 27a may be given a reflective characteristic by performing mirror finishing or the like on the inner surface of the housing 27a.

Each of the LED elements 22a emits ultraviolet light having a peak wavelength of 365 nm. Ultraviolet light with a peak wavelength of 365 nm is the most effective light for treating scleroderma. The ultraviolet light emitted by the LED elements 22a also includes light with a wavelength of 350 nm or less. Specifically, the LED elements 22a emit ultraviolet light (UVA1) having a peak wavelength of 365 nm and in the wavelength range of 340 nm to 400 nm.
The LED element 22a may be, for example, a surface mount type LED element made of an AlInGaN-based semiconductor.

A cable (not shown) for supplying power to the multiple LED elements 22a included in the light source unit 21 is electrically connected to the light source unit 21. This cable electrically connects the light source section 20 (light source unit 21) and the control section 30 shown in FIG.
The control unit 30 has control units such as an LED driving power supply unit and a PLC (programmable logic controller) arranged inside the housing 37, and can drive and control the multiple LED elements 22a provided in the light source unit 20, and control the irradiance and emission time of the light emitted by the light source unit 20.
The control unit 30 may be capable of individually controlling the driving of the plurality of LED elements 22a. In this case, the control unit 30 can selectively light up some of the plurality of LED elements 22a according to the size and shape of the affected area.

The light source unit 20 further includes a filter 23 disposed in the housing 27a between the LED elements 22a and the window member 28. The filter 23 substantially cuts out (blocks) light having a wavelength of 350 nm or less, preferably 355 nm or less, of the light emitted by the LED elements 22a. Note that since the LED elements 22a emit light in the UVA1 wavelength range (340 nm to 400 nm), the filter 23 may substantially cut out light having a wavelength of 340 nm or more and 350 nm or less, preferably 340 nm or more and 355 nm or less.
The filter 23 may be, for example, a colored glass filter, and may be made of a material such as silicate glass or phosphate glass.

Thus, the light source unit 20 has a plurality of LED elements 22a that emit light having a peak wavelength at 365 nm, and the filter 23 receives the light emitted from the LED elements 22a, substantially cuts out light having a wavelength of 350 nm or less, preferably 355 nm or less, and emits the transmitted light as therapeutic light. The therapeutic light that is transmitted through the filter 23 is then emitted from the window member 28.
Here, it is preferable to use a material for the window member 28 that has optical transparency to the above-mentioned therapeutic light and high mechanical strength. Specific examples of materials for the window member 28 include quartz glass. By using quartz glass as the material for the window member 28, it is possible to provide high mechanical strength and prevent breakage due to impact. Furthermore, when dirt adheres to the window member 28, it is possible to easily clean it with alcohol or the like.

The light source section 20 also includes a heat sink 24 for cooling the light source unit 21 outside the housing section 27 a on the opposite side of the light source unit 21 to the window member 28 .
The heat sink 24 is composed of a base portion 24a attached to the surface of the LED board 22b opposite to the surface on which the LED elements 22a are mounted, and a number of fins 24b attached to the base portion 24a. The fins 24b are arranged horizontally and in parallel. The heat sink 24 (base portion 24a, fins 24b) can be composed of aluminum, copper, or the like having high thermal conductivity.

3, the rear end portion of the housing 27 (the surface opposite to the surface on which the window member 28 is provided) is provided with air intake ports 27c for drawing air from outside the housing 27 into the housing 27. Specifically, the air intake ports 27c are formed on both sides of the heat sink 24 and at positions behind the heat sink 24.
As shown in FIGS. 3 and 4, an exhaust port 27 d is formed in the bottom surface of the housing 27 behind the heat sink 24 for exhausting gas inside the housing 27 to the outside of the housing 27 .

Furthermore, the light source unit 20 includes intake fans 25 (see FIG. 3) arranged on both sides of the heat sink 24 within the housing 27 and in front of the intake port 27c, and an exhaust fan 26 (see FIG. 4) arranged above the exhaust port 27d within the housing 27.
The intake fan 25 is disposed with its intake port facing the intake port 27 c and its exhaust port facing the side surface of the heat sink 24 .
Further, the exhaust fan 26 is disposed with its intake port facing upward and its exhaust port facing the exhaust port 27d.

As shown by the arrows in Fig. 7, the intake fan 25 takes in outside air (cooling air) from the intake port 27c into the housing 27 and blows the cooling air toward the side surface of the heat sink 24. The intake fan 25 may be, for example, a sirocco fan. In this way, the cooling air is introduced into the heat sink 24 from both the left and right sides as shown by the arrows in Fig. 7. At this time, since the fins 24b of the heat sink 24 extend in the blowing direction of the cooling air, the cooling air introduced into the heat sink 24 flows parallel to the fins 24b of the heat sink 24.
The cooling air introduced from both the left and right sides of the heat sink 24 and flowing through the flow paths between the fins 24b collide, for example, at the center of the heat sink 24 and flows rearward of the heat sink 24 as shown by the arrows in Figures 7 and 8. Then, as shown by the arrow in Figure 8, the exhaust fan 26 sucks in the cooling air that has flowed rearward of the heat sink 24 and exhausts it from the exhaust port 27d to the outside of the housing 27. The exhaust fan 26 can be, for example, an axial fan.

In this way, the intake fan 25 takes in cooling air from the rear of the housing 27, and the exhaust fan 26 exhausts the cooling air toward the bottom of the housing 27. In other words, the intake direction in which the intake fan 25 takes in cooling air into the housing 27 is different from (intersects with) the exhaust direction in which the exhaust fan exhausts the cooling air inside the housing 27 to the outside of the housing 27. Specifically, the intake direction by the intake fan 25 and the exhaust direction by the exhaust fan 26 differ by 90°.
Here, the amount of air drawn by the intake fan 25 and the amount of air exhausted by the exhaust fan 26 are substantially the same.

Of the two intake fans 25 arranged on either side of the heat sink 24, one of the intake fans 25 (front of FIG. 6) may have its outlet facing the upper side surface of the heat sink 24 and introduce cooling air to the upper side of the heat sink 24. The other intake fan 25 (back of FIG. 6) may have its outlet facing the lower side surface of the heat sink 24 and introduce cooling air to the lower side of the heat sink 24.
6, a guide member 25a may be provided to guide the cooling air discharged from the intake fan 25 to a targeted position on the heat sink 24. Also, a wind stopper 25b may be provided to block the cooling air that is blown by the intake fan 25 and flows through the flow path between the fins 24b of the heat sink 24.

In this way, by using a plurality of intake fans 25 to introduce cooling air into different positions of the heat sink 24, even if the volume of air from each intake fan 25 is weak, it is possible to introduce cooling air into the entire heat sink 24. This allows the intake fans 25 to be made smaller and the costs to be reduced.
In addition, by arranging a plurality of intake fans 25 on both the left and right sides of the heat sink 24 and blowing cooling air from both the left and right sides of the heat sink 24, it is possible to reduce uneven cooling caused by only cooling one side, such as the left or right side.

9, an attachment 40 for irradiation can be attached to the front of the window member 28 (the side from which the therapeutic light is emitted) at a distance from the window member 28. The attachment 40 can be made of, for example, resin. The attachment 40 can have a thickness of, for example, 3 cm.
By attaching the attachment 40, it is possible to physically prevent the treatment area of the patient from coming into contact with the window member 28. Furthermore, by bringing the attachment 40 into contact with the treatment area of the patient, it is possible to irradiate ultraviolet rays while maintaining a constant distance from the light source to the treatment area, thereby making it possible to keep the ultraviolet irradiance constant and thus maintain a constant therapeutic effect.
The attachment 40 is configured to be detachable from the housing 27. For example, the attachment 40 can be attached to and detached from the housing 27 by a magnet or the like. Note that the method of attaching and detaching the attachment 40 is not limited to the above.

When using the ultraviolet light therapy device 10, the operator grasps the manual lever 19 shown in FIG. 1 and places the light source unit 20 in a position where the window member 28 faces the diseased area of the patient. From the viewpoint of ensuring stable irradiance, it is preferable that the ultraviolet light therapy device 10 is used with the diseased area and the attachment 40 in contact with each other. Then, when the operator operates the graphic operation panel 39 of the control unit 30, the LED element 22a in the light source unit 20, which receives power from the control unit 30, is turned on, and the treatment light is irradiated (surface irradiation) onto the diseased area of the patient.

In the ultraviolet light therapy device 10 of this embodiment, the therapeutic light emitted from the light source unit 20 has a peak wavelength of 365 nm. Therefore, by irradiating the affected area with the therapeutic light, collagenase (MMP1), an enzyme that decomposes and fragments collagen, which is the cause of skin hardening in scleroderma, can be expressed with a significant difference. Therefore, an excellent therapeutic effect against scleroderma can be obtained.
In the ultraviolet therapy device 10 of this embodiment, the therapeutic light emitted from the light source unit 20 is light from which light with a wavelength of 350 nm or less has been substantially cut off. Light with a wavelength of around 340 nm is likely to cause an immediate darkening effect that darkens the skin immediately after irradiation with ultraviolet light. Furthermore, light with a wavelength of 328 nm or less is more likely to cause an erythema effect the shorter the wavelength. By substantially removing light with a wavelength of 350 nm or less from the therapeutic light, it is possible to suppress the erythema effect and immediate darkening effect that would occur if the therapeutic light were irradiated onto an affected area.

The ultraviolet light therapy device 10 of this embodiment may further include an attachment 40 that is disposed on the therapeutic light emitting side of the window member 28 and spaced apart from the window member 28 and has an opening through which the therapeutic light passes.
If the irradiation attachment is not used, there is a problem that human sebum adheres to the window member 28 during treatment, and the transmittance of ultraviolet light decreases due to the oil adhering to the window member 28. There is also a problem that the oil on the window member 28 heats up that part, causing the window member 28 to deteriorate.
By using the irradiation attachment as in this embodiment, it is possible to physically prevent the treatment area of the patient from contacting the window member 28. Furthermore, by bringing the treatment area of the patient into contact with the irradiation attachment, it is possible to irradiate ultraviolet rays while maintaining a constant distance from the light source to the treatment area.

Furthermore, in the ultraviolet therapy device 10 of this embodiment, the light source section 20 is equipped with an intake fan 25 that takes in cooling air for cooling the light source unit 21 into the inside of the housing 27, and an exhaust fan 26 that exhausts the cooling air that has cooled the light source unit 21 from an exhaust port 27d provided at the rear bottom of the housing 27.
In this way, the cooling air that has cooled the light source unit 21 is exhausted from the bottom of the housing 27 on the opposite side of the window member 28 from the LED elements 22a, so that the cooling air does not hit users such as doctors or patients. As a result, it is possible to prevent the cooling air from interfering with treatment by doctors or the like, or causing discomfort to patients during treatment.
In addition, the exhaust port 27d is provided at the bottom of the housing portion that protrudes rearward from the housing portion surrounding the housing portion 27a that houses the LED element 22a. Therefore, the cooling air that has cooled the light source unit 21 and is warmed can be exhausted outside the housing 27 without hitting the housing portion surrounding the housing portion 27a, and a decrease in the cooling effect can be suppressed.

Furthermore, the light source section 20 is provided with an intake port 27c on the side opposite to the front end of the housing 27 where the window member 28 is provided, and the intake fan 25 can take in cooling air from the intake port 27c into the housing 27. In other words, the cooling air that cools the light source unit 21 is drawn into the housing 27 from the rear surface thereof, so that the patient in front of the window member 28 does not feel that cooling air is flowing.
In addition, since the intake direction in which cooling air is taken in by the intake fan 25 into the inside of the housing 27 and the exhaust direction in which the exhaust fan 26 exhausts the cooling air inside the housing 27 from the exhaust port 27d intersect (different by 90°), a structure can be designed in which the warm air exhausted from the housing 27 is not sucked in, thereby preventing a decrease in the cooling effect.

Furthermore, the intake fans 25 can be disposed on the sides of the light source unit 21 in a plane parallel to the window member 28. Specifically, the intake fans 25 can be disposed on both the left and right sides of the light source unit 21, more specifically, on both the left and right sides of the heat sink 24 attached to the LED board 22b.
This allows cooling air to be blown to the heat sink 24 from both sides thereof, and efficiently dissipates heat from the light source unit 21. Also, since the heat sink 24 includes fins 24b extending in the horizontal direction, which is the blowing direction of the cooling air by the intake fan 25, the cooling air blown by the intake fan 25 can be appropriately directed through the flow paths between the fins 24b, and the cooling effect can be improved.

Furthermore, if the cooling air blown from both sides of the heat sink 24 collides at the center of the width of the heat sink 24 and flows rearward, it becomes easier to exhaust the cooling air from the exhaust port 27d formed at the center position of the width of the rear bottom of the housing 27.
In addition, in the ultraviolet treatment device 10 of this embodiment, the light source unit 20 is configured to be tiltable around a rotation axis 27e provided at the rear of the housing 27. From the viewpoint of posture and stability of operation, a heavy component such as the heat sink 24 is disposed near the rotation axis 27e. That is, the light source unit 21 is disposed at the rear of the housing 27. Therefore, by configuring the cooling air to be sucked in from the rear of the housing 27 and exhausted from the rear bottom of the housing 27, the fresh cooling air sucked into the housing 27 can be appropriately blown to the heat sink 24, and the warm air that has taken heat from the heat sink 24 can be quickly exhausted to the outside of the housing 27.

As described above, the ultraviolet therapy device 10 of this embodiment takes in cooling air into the housing 27 from a direction where there are no people, such as users or patients, and exhausts it from a direction where there are no people, making it an ultraviolet therapy device in which cooling air does not reach people.

(Modification)
In the above embodiment, the case where the intake fans 25 are arranged on both the left and right sides of the light source unit 21 has been described, but the intake fans 25 may be arranged on the sides of the light source unit 21. For example, the intake fan 25 may be arranged on only one side of the light source unit 21. However, when the intake fan 25 is arranged on only one side of the light source unit 21, depending on the air volume of the intake fan 25, etc., uneven cooling may occur, such that only the side on which the intake fan 25 is arranged is cooled. Therefore, in such a case, it is preferable to arrange the intake fans 25 on both sides of the light source unit 21.

In the above embodiment, the case where the intake direction of the intake fan 25 and the exhaust direction of the exhaust fan 26 are perpendicular to each other has been described, but the intake direction and the exhaust direction may intersect. If the intake direction and the exhaust direction do not coincide with each other, the exhaust air can be prevented from being mixed with the cooling air taken into the housing 27, so the intersection angle is not limited to 90°.
In the above embodiment, the light source is an LED, but the light source may be, for example, a lamp.
Furthermore, in the above embodiment, the therapeutic light has a peak wavelength of 365 nm. However, the wavelength of the therapeutic light can be set arbitrarily depending on the disease.
The ultraviolet light therapy device of the present invention is not limited to the above-described embodiment, and various modifications can be made.

10...UV therapy device, 20...light source section, 21...light source unit, 22a...LED element, 22b...LED board, 23...filter, 24...heat sink, 25...intake fan, 26...exhaust fan, 27...housing, 27a...accommodation section, 27b...reflector, 27c...intake port, 27d...exhaust port, 28...window member, 30...control section, 40...attachment

Claims (6)

An ultraviolet light therapy device having a light source unit that irradiates an affected area with therapeutic light including ultraviolet light,
The light source unit includes:
A housing and
A light source disposed inside the housing and emitting the ultraviolet light;
a window member provided at a front end of the housing and configured to emit the therapeutic light;
an intake fan that takes in cooling air into the housing;
an exhaust port provided at a bottom portion of the housing on a side opposite to the window member with respect to the light source;
an exhaust fan that exhausts cooling air from inside the housing through the exhaust port ,
An ultraviolet treatment device characterized in that the intake direction in which cooling air is taken into the inside of the housing by the intake fan and the exhaust direction in which the cooling air inside the housing is exhausted from the exhaust port by the exhaust fan intersect . the light source unit further includes an air intake port provided on a side of the housing opposite to the front end portion where the window member is provided,
2. The ultraviolet treatment device according to claim 1 , wherein the intake fan takes in cooling air from the intake port into the inside of the housing. 3. The ultraviolet treatment device according to claim 1, wherein the intake fan is disposed to the side of the light source in a plane parallel to the window member, and blows cooling air toward the light source. 4. The ultraviolet treatment device according to claim 3 , wherein the intake fans are disposed on both sides of the light source, sandwiching the light source, in a plane parallel to the window member. The light source unit includes:
a substrate on which the light source is mounted, the substrate being disposed opposite the window member;
a heat sink attached to a surface of the substrate opposite to the window member and configured to dissipate heat from the substrate;
The intake fan blows the cooling air taken into the housing against a side surface of the heat sink,
5. The ultraviolet treatment device according to claim 3 , wherein the heat sink is provided with fins extending in a direction in which the cooling air is blown by the intake fan. 6. The ultraviolet ray treatment device according to claim 1, wherein the light source is an LED.

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