JP2019076643A - Fluid treatment apparatus - Google Patents

Abstract

To provide a fluid treatment apparatus having a small-sized and simplified structure, and capable of cooling efficiently a light source part.SOLUTION: A fluid treatment apparatus 100 includes a passage, and a light source part 3 for irradiating a fluid passing through the passage with light, in which the passage includes a treatment passage 4 where the fluid is irradiated with light, and a cooling passage 5 for allowing the fluid for cooling the light source part 3 to pass therethrough.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fluid processing apparatus for irradiating a fluid with light, and more particularly to an apparatus for irradiating a fluid with ultraviolet light for sterilization and purification.

It is known that the ultraviolet light has a sterilizing ability, and an apparatus for irradiating the ultraviolet light is used for the sterilization treatment at a site of medical treatment or food processing. Moreover, the apparatus which disinfects a fluid continuously by irradiating a fluid with an ultraviolet-ray is also used.

Patent Document 1 describes a sterilizing apparatus provided with an ultraviolet LED on the outside of a sterilizing tube through which a fluid to be sterilized passes.

Generally, in a device using a light source such as an LED, it is necessary to dissipate the heat of the light source in order to prevent the deterioration of the light source and the decrease in the output. A structure for passing a fluid near the light source for cooling has been proposed.

Patent Document 2 describes a water purifier having a cooling water passage for cooling a light source in a modification 2-1.
A portion of the water passing through the flow path flows into the cooling flow path from the branch port, and the water purifier is structured to return to the flow path from the merging port.

However, in the structure shown in Patent Document 2, there is a concern that the water that has passed through the cooling flow path is not irradiated with ultraviolet light, so that purification of the water may be insufficient. In addition, since the structure becomes complicated, there is a problem that the entire apparatus becomes large and the manufacturing cost becomes high.

JP, 2013-158722, A JP, 2014-233646, A

An object of the present invention is to provide a fluid processing apparatus having a compact and simple structure and capable of efficiently cooling a light source unit.

The gist of the present invention is as follows.

(1) A flow path and a light source unit for irradiating light to the fluid passing through the flow path, and the flow path includes a processing flow path through which the light is irradiated to the fluid and cooling for passing the fluid for cooling the light source portion A channel is provided.
(2) In the fluid processing apparatus, it is preferable that at least a part of the fluid also passes through the cooling channel after all the fluid passes through the processing channel.
(3) In the fluid processing apparatus, it is preferable that all the fluid also passes through the processing channel after at least a part of the fluid passes through the cooling channel.
(4) In the fluid processing apparatus, preferably, the light source unit is in thermal contact with a jig for fixing the processing flow channel.
(5) In the fluid processing apparatus, it is preferable that a heat dissipation member thermally connected to the light source unit is in thermal contact with a jig for fixing the processing flow channel.
(6) The fluid processing apparatus, further comprising: a heat dissipation member thermally connected to the light source portion, a part of the heat dissipation member is embedded in the processing flow path, and the heat dissipation member and the fluid are thermally It is preferable that it is a structure which contacts.
(7) In the fluid processing apparatus, it is preferable that a reflective member that reflects the light emitted by the light source be provided on at least a part of the outer periphery of the processing flow channel.

According to the present invention, the following excellent effects can be expected.

(1) Since the cooling flow passage for passing the fluid for cooling the light source unit is provided, it is possible to prevent the deterioration and the output reduction of the light source unit due to the heat generation of the light source unit.
(2) Since the same fluid passes through the processing flow path and the cooling flow path, downsizing and simplification of the fluid processing apparatus can be realized.
(3) The light source unit and / or the heat dissipating member thermally connected to the light source unit has a structure in which it is in thermal contact with the jig for fixing the processing flow path, so that the light source unit is efficient Cooling can be performed.
(4) The reflecting member is a structure that reflects the light emitted by the light source at least in part,
The light emitted from the light source can be efficiently used for fluid processing.

FIG. 1 shows a schematic view of a fluid processing device according to a first embodiment. FIG. 2 shows a schematic view of a fluid processing device according to a second embodiment. FIG. 7 shows a schematic view of a fluid processing apparatus according to a third embodiment. FIG. 7 shows a schematic view of a fluid processing apparatus according to a fourth embodiment. The schematic diagram of the fluid processing apparatus concerning 5th Embodiment is shown. The schematic diagram of the fluid processing apparatus concerning 6th Embodiment is shown.

Hereinafter, embodiments of a fluid processing apparatus of the present invention will be described with reference to the drawings.

The first embodiment shown in FIG. 1 is a typical configuration of the fluid processing apparatus in the present invention.
The fluid processing apparatus 100 of FIG. 1 includes a light source unit 3 having a light source 1 and a substrate 2, a processing flow channel 4, and a cooling flow channel 5. The light source unit 3 is provided outside the processing flow channel 4, and the cooling flow channel 5 is in thermal contact with the light source unit 3 so as to cool the light source unit 3.

The fluid processing apparatus 100 of FIG. 1 has a structure in which the same fluid passes through the processing flow path 4 and the cooling flow path 5.
Since it is not necessary to separately use a cooling fluid or the like for the light source unit 3, the cost of the fluid processing apparatus can be reduced. In addition, the structure without the flow path branching leads to simplification and downsizing of the fluid processing apparatus.

The type of the light source 1 is not particularly limited, but in consideration of downsizing of the device and electrification, LEDs are preferable.
The wavelength of the light emitted by the light source 1 is not particularly limited. For example, ultraviolet light is suitable for sterilization and purification of the fluid.
The number and arrangement of the light sources 1 are not particularly limited, and the wavelength and output of the light source 1 (power consumption etc.), the amount of fluid, and the like according to the application and the processing efficiency of the fluid (for example, sterilization efficiency of fluid). It is arbitrarily selected according to the speed, temperature, type (e.g. water, air, etc.), contamination level of fluid before treatment, and the like.

The cooling channel 5 preferably has a high thermal conductivity and is in thermal contact with the light source unit 3. Due to the high thermal conductivity of the cooling channel 5, the cooling channel 5 itself is cooled by the fluid passing therethrough. Furthermore, when the cooling channel 5 and the light source unit 3 are in thermal contact, the light source unit 3 is also cooled. That is, the fluid flowing through the cooling channel 5 contributes to the cooling of the light source unit 3.
Examples of the material of the cooling channel 5 include metal substances such as copper and aluminum.
The cross-sectional shape of the cooling channel 5 is not particularly limited. For example, a circle, a square, etc. are mentioned.
The number of cooling channels 5 is one in FIG. 1 but is not particularly limited. It is arbitrarily selected according to the number of light sources 1 and the flow rate of fluid.
In addition, a branched structure or the like may be used so that all the fluid does not pass through the cooling channel 5, but in consideration of the cooling efficiency of the light source unit 3 and the miniaturization and simplification of the device A structure in which the fluid passes through the cooling channel 5 is preferable.

The material of the processing flow channel 4 is not particularly limited, but a material having a high transmittance to the wavelength of light irradiated by the light source 1 is preferable. For example, in the case of ultraviolet light, materials having high durability and transparency to ultraviolet light, such as fluorine resin and quartz, may be mentioned.
The cross-sectional shape of the processing channel 4 is not particularly limited. For example, a circle, a square, etc. are mentioned.
Although the number of the processing flow paths 4 is one in FIG. 1, it is not particularly limited. It is arbitrarily selected according to the number of light sources 1 and the flow rate of fluid.
As described above, the characteristics required for the cooling channel 5 and the processing channel 4 are different. When different materials are used for the cooling channel 5 and the processing channel 4, it is preferable to connect using a joint 10 or the like as shown in FIG. 1.
Furthermore, the cooling efficiency of the light source unit 3 can be enhanced by suitably changing the configuration of the processing channel 4. In FIG. 2 and subsequent figures, a preferred configuration of the processing channel 4 is shown.

In the present invention, a jig 6 for fixing the processing channel 4 may be provided. This configuration is a second embodiment shown in FIG.
When providing the jig 6, it is preferable to make thermal contact with the light source unit 3. With this structure, it is possible to transmit the heat generated by the light source unit 3 to the jig 6 and to prevent the deterioration of the light source unit 3 and the output reduction.
When the jig 6 and the housing 11 are in thermal contact, the heat generated by the light source unit 3 is finally transmitted to the housing 11. When a material having a high thermal conductivity is used for the housing 11, the heat radiation of the light source unit 3 can be more effectively promoted.
By combining the cooling effect of the light source unit 3 by the fluid passing through the cooling flow passage 5 (not shown) described above, the light source unit 3 can be further efficiently cooled.
The material of the jig 6 is preferably a material having a high thermal conductivity. In consideration of cost, processability, etc., metal materials such as aluminum are more preferable.
The structure capable of simultaneously performing the light irradiation to the fluid and the cooling of the light source unit leads to simplification and downsizing of the fluid processing apparatus.

In the present invention, a heat dissipation member 7 thermally connected to the light source unit 3 may be provided. This configuration is the third embodiment shown in FIG.
In the case of this configuration, the heat generated by the light source unit 3 is transmitted to the heat dissipation member 7, so that the deterioration and the output reduction of the light source unit 3 can be prevented.
By combining the cooling effect of the light source unit 3 by the fluid passing through the cooling flow passage 5 (not shown) described above, the light source unit 3 can be further efficiently cooled.
The material of the heat dissipation member 7 is preferably a material having a high thermal conductivity. In consideration of cost, processability, etc., metal materials such as aluminum are more preferable.
Furthermore, since the shape of the heat dissipation member 7 is not limited, the cooling efficiency of the light source unit 3 can be further enhanced by the shape of the heat dissipation member 7. Suitably, the shape etc. whose surface shown in FIG. 3 is uneven are mentioned.

As another form of the structure of FIG. 3, a part of the heat dissipation member 7 may be embedded in the processing flow path 4 and the heat dissipation member 7 may be in thermal contact with the fluid. This configuration is the fourth embodiment shown in FIG.
In the case of this structure, the heat dissipation member 7 is cooled by the fluid passing through the processing flow channel 4. Furthermore, when the heat dissipation member 7 and the light source unit 3 are in thermal contact with each other, the light source unit 3 is also cooled. That is, when the fluid flowing through the processing flow path 4 contributes to the cooling of the light source unit 3, it is possible to prevent the deterioration and the output decrease of the light source unit 3.
By combining the cooling effect of the light source unit 3 by the fluid passing through the cooling flow passage 5 (not shown) described above, the light source unit 3 can be further efficiently cooled.

As another form of the structure of FIG. 4, the reflecting member 8 provided with the window part 9 which permeate | transmits the light which the light source 1 irradiates may be provided. This configuration is the fifth embodiment shown in FIG.
When providing the reflecting member 8, a structure that covers at least a part of the outer periphery of the processing flow channel 4 is preferable.
Furthermore, the reflecting member 8 and the heat radiating member 7 may be in thermal contact with each other. In this configuration, the heat of the light source unit 3 is dissipated more efficiently.
The window portion 9 is preferably an air gap, but a material having high durability and transmittance may be used for the wavelength of light irradiated by the light source 1. For example, in the case of ultraviolet light, fluorine resin or quartz may be mentioned.
The light emitted from the light source 1 passes through the window 9 and is emitted to the fluid in the processing flow channel 4. Thereafter, the light is reflected by at least a part of the inner circumferential surface of the reflecting member 8, whereby the reflected light is irradiated to the fluid again. Therefore, the fluid can be processed efficiently.
By combining the cooling effect of the light source unit 3 with the fluid passing through the processing flow channel 4 and the cooling flow channel 5 (not shown) described above, efficient cooling of the light source unit 3 can be performed.

As another form of the structure of FIG. 4, a reflecting member 8 that reflects the light emitted by the light source 1 may be provided. This configuration is a sixth embodiment shown in FIG.
When providing the reflecting member 8, a structure that covers at least a part of the outer periphery of the processing flow channel 4 is preferable.
The light source 1 is provided on the inner peripheral surface of the reflecting member 8.
After the light emitted from the light source 1 is irradiated to the fluid in the processing flow path 4, the reflected light is irradiated to the fluid again by the light being reflected by at least a part of the inner peripheral surface of the reflecting member 8 . Therefore, the fluid can be processed efficiently.
By combining the cooling effect of the light source unit 3 with the fluid passing through the processing flow channel 4 and the cooling flow channel 5 (not shown) described above, efficient cooling of the light source unit 3 can be performed.

Examples of the fluid treatment apparatus (FIG. 1) of the present invention will be specifically described below, but the scope of the present invention is not limited thereto.

As a process flow path, a tube made of fluorine resin is used. The cross-sectional shape is circular, and the inner diameter is 8 mm and the outer diameter is 10 mm.
A copper pipe and a copper block are used as the cooling channel. The cross-sectional shape of the copper tube is circular, with an inside diameter of 4.35 mm and an outside diameter of 6.35 mm. Through holes are made in the copper block, and the copper block and the copper tube are in close contact with each other.
A joint is provided between the processing flow channel and the cooling flow channel, and all the fluids passing through the processing flow channel also pass through the cooling flow channel.

Four LEDs are used as a light source. The emission length of the LED is 265 nm, and the power consumption per LED is 2.1 W. Specifically, the consumption voltage per unit is 6 V, and the consumption current per unit is 350 mA.
The LED is placed on the top surface of the copper block that is the cooling channel.

  The fluid to be treated is water, and the flow rate is 100 ml / min. The temperature of the water before treatment is about 20 ° C.

About the example, as a result of measuring the temperature of LED in the fluid processing apparatus in working, it was confirmed that it is always 60 degrees C or less.
Usually, an LED that emits ultraviolet light rises in temperature above 80 ° C. without a cooling means. Therefore, it can be confirmed that the cooling effect of the LED is obtained by the structure of the embodiment.

In general, when the temperature of the LED exceeds 80 ° C., the operating temperature range of the LED is deviated, and problems such as a decrease in the output of the LED due to heat generation and deterioration of the LED occur.
Also, in general, an LED that emits ultraviolet light as in the example has a high conversion efficiency from electricity to light, so heat tends to be generated. Therefore, it is particularly important to have an effective means of cooling the LEDs that emit ultraviolet light.

  The structure of the fluid processing device in the embodiment leads to a reduction in the cost of the fluid processing device because it is not necessary to separately use a cooling fluid or the like. In addition, the structure without the flow path branching leads to simplification and downsizing of the fluid processing apparatus.

The fluid processing apparatus of the present invention has a compact and simple structure, and can efficiently cool the light source at low cost. In particular, it is useful in an apparatus for irradiating a fluid with ultraviolet light to perform sterilization and purification, but the application is not limited.

DESCRIPTION OF SYMBOLS 1 light source 2 board | substrate 3 light source part 4 processing flow path 5 cooling flow path 6 jig 7 heat dissipation member 8 reflection member 9 window part 10 coupling 11 case 100 to 105 fluid processing apparatus

Claims (7)

The flow path includes a flow path and a light source unit that emits light to the fluid passing through the flow path. The flow path includes a processing flow path through which light is irradiated to the fluid, and a cooling flow path that passes the fluid that cools the light source portion. A fluid processing apparatus comprising:
The fluid processing apparatus is characterized in that at least a part of the fluid also passes through the cooling channel after all the fluid passes through the processing channel.
The fluid processing device according to claim 1.
The fluid processing apparatus is characterized in that after at least a part of the fluid passes through the cooling channel, all the fluid also passes through the processing channel.
The fluid processing device according to claim 1.
In the fluid processing apparatus, the light source unit is in thermal contact with a jig for fixing the processing flow path.
The fluid processing apparatus according to any one of claims 1 to 3.
In the fluid processing apparatus, a heat dissipation member thermally connected to the light source unit is in thermal contact with a jig for fixing the processing flow path.
The fluid processing apparatus according to any one of claims 1 to 4.
The fluid processing apparatus includes a heat dissipation member thermally connected to the light source unit, a part of the heat dissipation member is embedded in the processing flow path, and a fluid is in thermal contact with the heat dissipation member. Characterized by being a structure,
The fluid processing apparatus according to any one of claims 1 to 5.
In the fluid processing apparatus, at least a part of an outer periphery of the processing flow path is characterized by including a reflecting member that reflects light emitted by the light source.
The fluid processing apparatus according to any one of claims 1 to 6.

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