JP2023033175A - Protection structure of heating member and liquid processing device - Google Patents

Abstract

To provide a protection structure which can be used preferably in a liquid processing device etc., which is immersed in a liquid to be used, make heating components, such as light emitting elements, waterproof, and radiate heat.SOLUTION: In a protection structure of a heating member, a heating component housed in a sealing member is installed at a heat radiation member. Further, the sealing member and the heat radiation member are connected through a connection member which may be fixed to the sealing member and the heat radiation member in a watertight manner.SELECTED DRAWING: Figure 1

Description

The present invention relates to a protective structure for a heat-generating member such as a light-emitting element, and is particularly suitable for waterproofing a light-emitting element in a liquid processing apparatus that is used while immersed in a liquid.

Ultraviolet light is known to have a sterilizing ability, and a liquid treatment apparatus that sterilizes sewage or the like by irradiating it with ultraviolet light is used. Some liquid processing apparatuses are used by being immersed in a liquid, and in such apparatuses, electric parts such as light emitting elements are waterproofed.

Electrical components can generate heat, so heat dissipation must also be taken into consideration. In particular, in a liquid treatment apparatus using a light emitting element, if the power supplied to the light emitting element is increased in order to increase the treatment capacity, the amount of heat generated by the light emitting element also increases. It is necessary to promote heat dissipation of the light emitting element.

Liquid processing equipment that is immersed in a liquid is cooled by the surrounding liquid, so the heat dissipation of the heat-generating parts is promoted to some extent, but the heat dissipation effect is limited due to waterproof protection. become a thing. For example, in the waterproof structure described in Patent Document 1, the periphery of the light emitting element is sealed with resin, so the resin acts as a resistance against heat conduction.

Moreover, in the case of a waterproof structure in which an air layer exists around the light emitting element as described in Patent Document 2, the air layer functions as a heat insulating layer, so the liquid cannot be expected to have a heat dissipation effect.

When there is an air layer around the light-emitting element, heat dissipation from the light-emitting element can be promoted by using a cooling fan as described in Patent Document 3, but there are problems such as an increase in size and complexity of the device. do.

JP 2012-89466 A Japanese Unexamined Patent Application Publication No. 2015-2032 JP-A-10-293540

SUMMARY OF THE INVENTION An object of the present invention is to provide a protective structure capable of both waterproofing and heat radiation of a heat-generating component such as a light-emitting element, which can be preferably used in a liquid processing apparatus or the like that is used while immersed in a liquid.

As a result of intensive studies on the protective structure, the inventors of the present invention have developed a connecting member that allows the heat-generating components housed in the sealing member to be installed on the heat-dissipating member, and that can be water-tightly fixed to both the sealing member and the heat-dissipating member. By connecting the sealing member and the heat dissipating member through the gap, the above problem was solved.

The present invention is a protective structure for a heat-generating component, which has a heat-dissipating member having a first region and a second region, the heat-generating component is installed in the first region, and a sealing member is provided inside at least the first region. The connecting member accommodates therein the transition portion from the first region to the second region of the heat radiating member, the sealing member is connected to one end side of the connecting member, and the second region of the heat radiating member is connected It is characterized by being watertightly fixed to the other end side of each member.

According to the present invention having the above configuration, the following functions and effects are achieved.

(a) Since the heat-generating component can be waterproofed while a part of the heat-radiating member on which the heat-generating component is installed is brought into contact with the liquid, both waterproofing and heat radiation of the heat-generating component can be achieved.

(b) Dissipation of heat from heat-generating components can be facilitated without excessively increasing the size and complicating the protective structure.

(c) Since the heat-generating component has an excellent heat dissipation effect, it is possible to increase the power supplied to the light-emitting element in the liquid processing apparatus using the light-emitting element as the heat-generating element, thereby contributing to the improvement of the performance of the liquid processing apparatus.

It is the basic configuration of the present invention. It is an example of the concrete shape of the 2nd area|region of the heat radiating member used for this invention. It is a specific example (pipe joint) of the connecting member used in the present invention. 1 is an example of a liquid treatment apparatus using the present invention; It is a modified example of a liquid treatment apparatus using the present invention. It is an example of a holding member used when using a plurality of protective structures of the present invention in combination. It is an example of a liquid treatment apparatus configured by combining a plurality of protective structures of the present invention. It is a modified example of a liquid treatment apparatus configured by combining a plurality of protective structures of the present invention. It is a liquid treatment apparatus of a comparative example.

The present invention will be described below with reference to FIG. FIG. 1 shows the basic configuration of the protection structure of the present invention, in which a heat-generating component 10 is installed in a first region 21 existing on one end side of a heat-dissipating member 20, and inside a sealing member 30, a first region 21 is provided. 21 are housed.

The second region 22 exists on the other end side of the heat dissipation member 20 via the transition portion 25 , and the connection member 40 is provided so as to accommodate the transition portion 25 .

What is characteristic of the present invention is that the sealing member 30 is watertightly fixed to one end of the connection member 40 and the second region 22 of the heat dissipation member 20 is fixed to the other end of the connection member 40 . It must be fixed watertight.

A portion of the second region 22 is configured to contact the fluid (air or liquid) present around the protective structure so that the heat dissipation member 20 is cooled by the fluid. Since the heat-generating component 10 is installed in the first region 21 of the heat-radiating member 20, the heat generated from the heat-generating component 10 is radiated into the fluid through the heat-radiating member 20, and the heat-radiating component 10 dissipates heat. Promoted.

When the second region 22 comes into contact with the liquid, the problem is to prevent the liquid from entering the heat generating component 10 installed in the first region 21 from the second region 22 along the surface of the heat dissipation member 20. It is to prevent. In the present invention, the connection member 40 solves this problem.

In the present invention, the transition portion 25 of the heat radiating member 20 is accommodated inside the connecting member 40, and the second region 22 of the heat radiating member 20 is watertightly fixed to the other end side of the connecting member 40. Since the infiltration path of the liquid from the area 22 side to the first area 21 side is blocked, infiltration of the liquid into the heat generating component 10 along the surface of the heat radiating member 20 can be prevented.

In the present invention, the contact portion between the sealing member 30 that accommodates a portion of the first region 21 and another member that is in contact with the sealing member 30 can also serve as a path for liquid to enter the heat-generating component 10. . By watertightly fixing the sealing member 30 to one end side of the connecting member 40, this path is also blocked, so that the heat-generating component 10 is ensured to be waterproof against the surrounding liquid.

Since the heat dissipating member 20 is used to promote heat dissipation from the heat generating component 10, it is preferably made of a material with excellent thermal conductivity, such as copper or aluminum. You may process.

A specific aspect of the heat radiating member 20 is not particularly limited, and any aspect can be appropriately selected and used as long as it does not significantly hinder the heat dissipation of the heat generating component 10 and the desired heat dissipation performance can be obtained.

From the viewpoint of facilitating the heat dissipation of the heat-generating component 10 , it is preferable that the portion of the first region 21 where the heat-generating component 10 is installed be in a state in which a contact area with the heat-generating component 10 can be secured. For example, when the heat-generating component 10 is a chip-shaped LED, there is an aspect in which the portion to be installed is flat. Alternatively, the heat-generating component 10 itself may be modified to facilitate heat dissipation, such as by mounting the chip-shaped LED on a wiring board with high heat dissipation and placing this wiring board in the first region 21 .

From the same point of view, it is preferable that the portion of the second region 22 that contacts the fluid has a shape that can increase the surface area. The simplest form of the second region 22 is the columnar shape shown in FIG. 2(a). It is possible to adopt the mode of FIG. 2(c) imitating the shape of pin fins used in various heat dissipating members, the mode of FIG. 2(d) imitating the shape of plate fins used in various heat dissipation members, etc. A mode in which the surface is provided with unevenness to increase the surface area can also be adopted.

Alternatively, a heat sink that is in direct contact with the fluid may be separately prepared, and the second region 22 may be shaped in consideration of connection with the heat sink. For example, as shown in FIG. 2(e), the tip of the second region 22 may be formed into a flat plate shape and provided with a mounting hole for fixing to the heat sink. In this case, it can be considered that the second region 22 is formed by integrating the other end side of the heat radiating member 20 and a separately prepared heat sink.

The heat radiating member 20 may be integrally molded or may be a combination of a plurality of members.
From the viewpoint of facilitating the heat radiation of the heat-generating component 10, a mode of integral molding can be preferably used, and from the viewpoint of ease of assembly of the protective structure, a mode of combining a plurality of members can be preferably used.

When configuring the heat radiating member 20 by combining a plurality of members, a first member having a region to be the first region 21 formed according to the mode of the heat generating component 10 and a second member having a predetermined fin shape are provided. By combining a member having a region that becomes the region 22, the heat dissipation of the heat-generating component 10 can be efficiently performed while ensuring the easiness of assembly of the protective structure.

When the heat dissipation member 20 is configured by combining a plurality of members, a mode in which a plurality of first members having a region to be the first region 21 are combined with a second member having a region to be the second region 22 is selected. You can also

Since the heat-generating component 10 normally operates by being supplied with electric power, the protective structure of the present invention is provided with power supply means for supplying power to the heat-generating component 10 . A power supply line is a typical power supply means, but when the power supply line 50 is used as the power supply means, liquid enters the inside of the sealing member 30 from between the sealing member 30 and the power supply line 50. In order to prevent this, it is preferable to fix the power line 50 to the sealing member 30 in a watertight manner. When fixing, a filler may be provided between the power line 50 and the sealing member 30 if necessary.

When the power line 50 is watertightly fixed to the sealing member 30, a method for strengthening the fixation can be appropriately selected and used. One example is a method of using the same kind of material for the covering material of the power line 50 and the material for forming the sealing member 30 . As will be described later, when a tubular member made of fluororesin is used as the sealing member 30, an electric wire coated with fluororesin can be preferably used as the power supply wire 50. FIG. When a filler is also used, it is preferable that the filler be of the same kind as the covering material of the power line 50 and the material of the sealing member 30 .

The connection member 40 used in the present invention is not particularly limited, and any aspect can be appropriately selected and used as long as the object of the present invention can be achieved.

From the standpoint of reliably watertightly fixing the second region 22 and the sealing member 30 and easily obtaining the protective structure of the present invention, a pipe joint used for piping or the like can be preferably used as the connecting member 40 .

A specific example of a pipe joint 41 that can be preferably used in the present invention is shown in FIG.

One end side of the pipe joint 41 accommodates a tubular member such as a pipe, and is configured so that the tubular member can be watertightly fixed by tightening a fixing screw 42 . By using the tubular sealing member 30 and the pipe joint 41 , the sealing member 30 can be reliably and simply watertightly fixed to the pipe joint 41 .

A male thread 43 is formed on the other end side of the pipe joint 41, and by winding a sealing tape around the male thread 43 and screwing it with the female thread, it can be watertightly fixed to a member having a female thread. can be done. A female thread is provided in the second region 22 of the heat radiating member 20 and screwed into the male thread 43 of the pipe joint 41 via a seal tape, so that the second region 22 of the heat radiating member 20 can be securely and firmly attached to the pipe joint 41 . It can be fixed watertight easily.

The protective structure of the present invention exerts a desired effect on the liquid existing around the heat generating component 10 by the function of the heat generating component 10, or detects the state of the liquid existing around the heat generating component 10 by the heat generating component 10. It is intended to be used as a waterproof structure against

Specific examples of the heat-generating component 10 used in the present invention include a light-emitting element that emits light to the liquid present outside the sealing member 30, and a light-receiving element that detects the light emitted to the liquid. .

Specific examples of light-emitting elements include visible light LEDs for illuminating liquids, deep ultraviolet LEDs/ultraviolet LEDs for sterilizing liquids, and semiconductor lasers for measuring the concentration, turbidity, contamination state, and the like of liquids. The wavelength band of the light emitted by the light emitting element can be selected from the ultraviolet region, the visible light region, and the infrared region depending on the application.

When a deep ultraviolet LED or ultraviolet LED, which is a type of light-emitting element, is used as the heat-generating component 10, the protective structure of the present invention can be used as a liquid treatment apparatus that sterilizes liquid by operating the heat-generating component 10. Available.

A specific example of the light-receiving element is a photodiode that detects laser light or the like for measuring the concentration, degree of contamination, or the like of the liquid.

Considering that a light-emitting element, a light-receiving element, or the like is used as the heat-generating component 10, the sealing member 30 is made of a translucent material.

Examples of light-transmitting materials include optical glass such as quartz glass, light-transmitting ceramic materials, and resin materials such as acrylic resins and fluorine resins.

Considering that the pipe joint 41 is used as the connecting member 40, the sealing member 30 preferably has a tubular shape such as a pipe or a tube.

In addition, it is necessary to apply stress to the sealing member 30 when watertightly fixing the sealing member 30 to the pipe joint 41, and it is difficult to handle the liquid treatment apparatus using the protective structure of the present invention. Considering ease of installation, the sealing member 30 is preferably made of a material that is not easily damaged, and a resin material can be suitably used. If the sealing member 30 is made of a material that is difficult to break, it is possible to suppress scattering of the material into the liquid due to breakage.

Considering the translucency and durability to the light emitted by the light emitting element and the antifouling property to the liquid, fluororesin is preferably used as the material for forming the sealing member 30. A cut piece can be used as the sealing member 30 . As the fluorine resin, PFA, FEP, ETFE, PTFE, etc. can be appropriately selected and used.

Additionally, the protective structure of the present invention may comprise a sensing member for sensing the state of the liquid present around the sealing member 30 . Specific examples of detection members include a water level sensor that determines whether the protective structure is immersed in a liquid, a concentration sensor that measures the concentration of a specific component contained in the liquid, a temperature sensor that measures the temperature of the liquid, and a liquid flow rate. and a flow sensor that measures the

When the detection member is provided, the member constituting the protection structure of the present invention may be changed to a mode suitable for the intended detection, if necessary. For example, when an optical water level sensor is provided in the sealing member 30, the outer peripheral surface of the sealing member 30 may be changed into a shape suitable for water level detection.

When a detection member is provided, the operation of the heat-generating component 10 may be controlled based on the detection result. For example, when the detection member is a water level sensor, the heat-generating component 10 is operated when the protective structure is immersed in the liquid, and the heat-generating component 10 is stopped when the protective structure is out of the liquid. When the detection member is a concentration sensor, the control is such that the heat-generating component 10 is operated when the concentration of the component to be detected exceeds a predetermined threshold value.

As described above, the protective structure of the present invention can be applied to a liquid processing apparatus that performs predetermined processing on liquid by the operation of the heat-generating component 10 .

Moreover, the protective structure of the present invention can be used alone, or can be used in combination with a plurality of protective structures. For example, a plurality of protective structures in which the second regions 22 are formed in a cylindrical shape are prepared and fixed to a holding member 60 formed with a plurality of holding holes 61 capable of accommodating the second regions 22 shown in FIG. processing equipment.

As an example of a liquid treatment apparatus in which a plurality of protective structures are fixed to a holding member 60, the embodiment shown in FIG. 7 can be given. The liquid treatment apparatus shown in FIG. Each of the holding holes 61 formed in the holding member 60 has the heat-generating component 10 facing radially outward of the holding member 60 . In this embodiment, the protective structure in which the second region 22 is formed in a cylindrical shape is fixed.

Like the heat radiating member 20 , the holding member 60 is preferably made of a material having excellent thermal conductivity, and the heat radiating member 20 and the holding member 60 can be integrally formed to promote heat dissipation from the heat generating component 10 .

In the liquid processing apparatus shown in FIG. 7, the heat-generating component 10 (light-emitting element) watertightly protected together with the holding member 60 is immersed in the liquid, so that the liquid processing by the heat-generating component 10 is performed while the holding member 60 is cooled by the liquid. The heat generated from the heat-generating component 10 is dissipated into the liquid via the heat-radiating member 20 to the holding member 60, and heat radiation from the heat-generating component 10 is promoted.

Another example of the liquid treatment apparatus in which a plurality of protective structures are fixed to the holding member 60 is the embodiment shown in FIG. 8. The liquid treatment apparatus shown in FIG. In each of the holding holes 61 formed in the holding member 60 of the embodiment, the heat-generating component 10 faces radially inwardly of the holding member 60 . In this embodiment, the protective structure in which the second region 22 is formed in a cylindrical shape is fixed.

The holding member 60 shown in FIG. 6B has a channel hole 62 penetrating through the center thereof, and a tubular channel 70 is inserted through the channel hole 62 as shown in FIG.

In the liquid processing apparatus shown in FIG. 8, the liquid flowing through the channel 70 is irradiated with light from the heat-generating components 10 (light-emitting elements) arranged so as to surround the channel 70 to process the liquid. The holding member 60 is cooled by the liquid flowing through, and as a result, the heat dissipation of the heat-generating component 10 is promoted.

In the liquid processing apparatus shown in FIG. 8, the holding member 60 is cooled by the liquid flowing through the flow path 70. However, if necessary, the holding member 60 may be immersed in a coolant for further cooling. Cooling of the holding member 60 by the liquid flowing through the flow path 70 can be appropriately selected from cooling via a tubular member forming the flow path 70 or cooling by bringing the liquid into direct contact with the holding member 60 .

An example of a liquid treatment apparatus to which the protective structure of the present invention is applied will be described below.

[Example 1]
A liquid processing apparatus 100-1 of Example 1 is shown in FIG. The liquid processing apparatus 100-1 was configured as follows.

As a heat generating component 10, an ultraviolet LED 11 with a maximum output of 65 mW and a recommended operating temperature of 65° C. or less used as a light source of an ultraviolet sterilizer is mounted on a high heat dissipation wiring board 12 mainly made of aluminum with a width of 5 mm and a length of 17 mm. use stuff.

A two-core cable with a jacket 51 made of fluorine resin was used as the power supply line 50 , and each cable was connected to the positive electrode and the negative electrode of the wiring board 12 .

The heat radiating member 20 is integrally formed by processing a columnar member made of copper, and has a first region 21 on one end side and a second region 22 on the other end side. The heat radiating member 20 has a disk portion 203, a body portion 202, and a cylindrical projecting portion 201, which will be described below.

A total of five disk portions 203 having a diameter of 14 mm and a thickness of 2 mm are provided on the other end side of the heat radiating member 20 to function as plate fin-shaped heat radiating fins. The interval between the disk portions 203 is 3 mm, and the thickness of the small diameter portion present between the disk portions 203 is 5 mm.

A trunk portion 202 having a diameter of 14 mm and a length of 15 mm is provided continuously with the disk portion 203 on one end side of the disk portion 203 . One end of the trunk portion 202 is formed with a female screw hole having a length of 7.5 mm, into which a male screw 43 of a copper pipe joint 41 to be described later is screwed. The disc portion 203 and the trunk portion 202 correspond to the second region 22 .

A cylindrical protrusion 201 with a diameter of 5 mm and a length of 65 mm is provided at the center of the bottom of the female screw hole and protrudes toward one end. By removing, a flat portion having a width of 5 mm and a length of 20 mm is formed on one end side of the columnar protrusion 201 . This flat portion corresponds to the first region 21 .

The heat-generating component 10 to which the power line 50 is connected is fixed to the center of the flat portion formed on the cylindrical projecting portion 201 .

A fluorocarbon resin tube having a length of 90 mm, an inner diameter of 6 mm, and an outer diameter of 8 mm was prepared as the sealing member 30, and the other end side was prepared as the connection member 40. One end side of a copper pipe joint 41 (applicable pipe outer diameter: 8 mm). be watertight. At the same time, the male thread 43 formed on the other end side of the pipe joint 41 is wrapped with a sealing tape.

The cylindrical protrusion 201 of the heat radiating member 20 to which the heat generating component 10 is fixed is inserted from the other end side of the fluororesin tube 30 to which the pipe joint 41 is fixed, and the one end of the heat radiating member 20 is inserted from the one end side of the pipe joint 41 . protrude side.

At the same time, the male thread 43 of the pipe joint 41 wrapped with the sealing tape is screwed into the female thread formed on the trunk portion 202 of the heat radiating member 20 to fix the heat radiating member 20 and the pipe joint 41 in a watertight manner. At this time, part of the columnar projecting portion 201 becomes the transition portion 25 accommodated inside the pipe joint 41 .

Finally, one end of the fluororesin tube 30 is heat-sealed to the fluororesin jacket 51 of the power supply line 50 over a length of 30 mm to fix them watertightly. The processing apparatus 100-1 is completed.

[Example 2]
A liquid processing apparatus 100-2 of Example 2 is shown in FIG. The liquid treatment apparatus 100-2 is obtained by changing the shape of the second region 22 of the heat dissipation member 20 from the liquid treatment apparatus 100-1 of the first embodiment. A second region 22 is used in which the surface area is increased by providing holes.

The heat dissipating member 20 of Example 2 also has a first region 21 on one end side and a second region 22 on the other end side, which is integrally molded by processing a cylindrical member made of copper. The heat radiating member 20 has a cavity portion 204, a body portion 202, and a cylindrical projecting portion 201, which will be described below.

A trunk portion 202 having a diameter of 14 mm and a length of 40 mm is provided on the other end side of the heat radiating member 20 . A total of six holes 204 with a diameter of 3 mm and a depth of 25 mm are formed on the other end side of the trunk portion 202 .

One end of the trunk portion 202 is formed with a female screw hole with a length of 7.5 mm, into which the male screw 43 of the copper pipe joint 41 is screwed, as in the first embodiment. A body portion 202 provided with a hole portion 204 corresponds to the second region 22 .

The second region 22 of the heat radiating member 20 of Example 2 has a smaller surface area than that of Example 1, and is expected to have lower heat dissipation performance. It has the advantage that it can be manufactured in

At the center of the bottom of the female screw hole, a columnar protrusion 201 and a first region 21 are formed by removing one end of the columnar protrusion 201 in a semicircular shape, as in the first embodiment.

The heat-generating component 10 to which the power line 50 is connected is fixed to the center of the flat portion formed on the cylindrical projecting portion 201 .

Other configurations are the same as those of the first embodiment.

[Example 3]
A liquid treatment apparatus 100-3 of Example 3 is an embodiment in which a plurality of protective structures of the present invention are combined with a holding member 60. FIG.

6(b) is used as the holding member 60, and in the liquid treatment apparatus 100 shown in FIG. 8, the connection member 40 is replaced with the pipe joint 41 shown in FIG. corresponds to the liquid processing apparatus 100-3 of FIG.

The holding member 60 has a diameter of 68 mm and a length of 40 mm, and as shown in FIG. .

A channel hole 62 having a diameter of 8 mm is provided in the center of the holding member 60, and a fluororesin tube as a channel 70 is inserted therethrough.

The protective structure used in Example 3 is different from the liquid treatment apparatus 100-1 of Example 1 in that the shape of the second region 22 of the heat radiating member 20 is changed.

In addition, the ultraviolet LED 11 was changed to one with a maximum output of 100 mW and a recommended temperature of 85° C. or less.

The heat dissipating member 20 of Example 3 also has a first region 21 on one end side and a second region 22 on the other end side, which is integrally molded by processing a cylindrical member made of copper. The heat radiating member 20 has a body portion 202 and a cylindrical projecting portion 201, which will be described below.

A trunk portion 202 having a diameter of 14 mm and a length of 40 mm is provided on the other end side of the heat radiating member 20 , and this trunk portion 202 corresponds to the second region 22 . A female threaded hole to be screwed into the male thread 43 of the copper pipe joint 41 is formed on one end side of the body 202 as in the first embodiment.

Other parts of the heat radiating member 20 are the same as those of the first embodiment.

An ultraviolet LED 11 to which a power line 50 is connected is fixed to the center of the flat portion formed on each columnar protrusion 201 .

The sealing member 30 and the pipe joint 41 are the same as those in the first embodiment, and are water-tightly fixed. 41 are fixed in a watertight manner.

Next, the power line 50 and the sealing member 30 were watertightly fixed to complete the protective structure of the present invention.

A total of six body portions 202 having the protective structure described above are inserted into the respective holding holes 61 of the holding member 60, and the side surfaces of the body portions 202 are stopped with the ultraviolet LEDs 11 facing radially inward of the holding member 60. Fixing was performed by pressing with a screw (not shown), and the liquid processing apparatus 100-3 of Example 3 was completed.

[Comparative example]
As a liquid treatment apparatus 100' of a comparative example, the portion corresponding to the second region 22 and the pipe joint 41 are omitted from the liquid treatment apparatus 100-1 of the first embodiment, and the other end of the sealing member 30 (fluororesin tube) is A liquid treatment apparatus 100' (see FIG. 9) was fabricated with the sides sealed watertight by heat sealing.

[Cooling performance test 1]
The following cooling performance test was performed on the liquid treatment apparatuses of Examples 1 and 2 and Comparative Example prepared as described above to evaluate the performance.

A state in which the ultraviolet LED 11 emits light at the maximum output is defined as a state with an output rate of 1.0, and the current and voltage supplied to the ultraviolet LED 11 are adjusted so that the output rate varies within the range of 0.6 to 1.0. .

The liquid processing apparatus 100 is installed in the air at 25° C. or in the water at 25° C., the output rate is changed in the range of 0.6 to 1.0 to operate the ultraviolet LED 11, and the wiring board on which the ultraviolet LED 11 is mounted. The temperature of 12 is measured with a thermocouple. Table 1 shows the temperature measurement results.

In the air test of the liquid treatment apparatus 100' of the comparative example, the measured temperature reached 65°C or higher before the output rate reached 0.6, and the test was stopped at that point. Although the liquid treatment apparatus 100' of the comparative example is also assumed to be used in water, it is judged to be impractical in a state where the recommended operating temperature is exceeded before the output rate reaches 0.6 in air. However, the test in water was omitted.

On the other hand, the liquid treatment apparatus 100-1 of Example 1 reached a measured temperature of 65° C. or higher when the output rate was 0.8 in the test in air. From this result, it was confirmed that the liquid treatment apparatus 100-1 adopting the protection structure of the present invention can obtain the heat dissipation effect of the ultraviolet LED 11 even in the air.

In addition, in the underwater test, the liquid treatment apparatus 100-1 of Example 1 had a measured temperature of 44° C. even when the output rate was 1.0, which is sufficiently lower than the threshold value of the recommended use temperature of 65° C. , it was confirmed that a sufficient heat dissipation effect was obtained when used in water. Since the application of the present invention can achieve an output ratio of 1.0, it also contributes to improving the performance of the liquid treatment apparatus 100-1.

Moreover, no water leakage into the sealing member 30 was confirmed, and it was also confirmed that the sealing member 30 had a sufficient waterproof effect.

In the test in air, the liquid treatment apparatus 100-2 of Example 2 reached a measured temperature of 65° C. or higher when the output rate was 0.8. Although the measured temperature at the output rate of 0.6 to 0.7 is higher than that in Example 1 due to the difference in the shape of the second region 22, it was confirmed that the UV LED 11 has a heat dissipation effect in the air. .

In the underwater test, the liquid treatment apparatus 100-2 of Example 2 had a higher measured temperature than Example 1 due to the difference in the shape of the second region 22, but even when the output rate was 1.0, the measured temperature remained at 51°C, which is well below the recommended operating temperature threshold of 65°C. From this result, it can be evaluated that this is a mode in which a practically acceptable level of heat radiation effect can be obtained when used in water.

Moreover, no water leakage into the sealing member 30 was confirmed, and it was also confirmed that the sealing member 30 had a sufficient waterproof effect.

Although the difference between Example 1 and Example 2 is the specific shape of the second region 22, the heat dissipation effect could be obtained even if the shape of the second region 22 was different. From this, the heat dissipation effect in the present invention is obtained because the second region 22 of the heat dissipation member 20, in which the heat generating component 10 is installed in the first region 21, is configured to be in direct contact with the fluid. It can be evaluated that

On the other hand, as long as the second region 22 has a shape that takes heat dissipation into consideration, there is a range of choices for the specific shape, and the shape of Example 1 that emphasizes heat dissipation and ease of manufacture are different. It can be said that the shape and the like of the second embodiment, which is emphasized, can be appropriately selected and used.

[Cooling performance test 2]
The following cooling performance test was performed on the liquid processing apparatus 100-3 of Example 3.

With the other end side of the liquid processing apparatus 100-3 facing downward, the holding member 60 is immersed in water at 20.degree.

While flowing water of 20° C. in the flow path 70 from the lower side to the upper side of the liquid processing device 100-3, all the six ultraviolet LEDs 11 were operated at an output rate of 1.0, and each ultraviolet LED 11 was mounted. The temperature of each wiring board 12 is measured by a thermocouple.

In Example 3, the measured temperature of each wiring substrate 12 was less than 30° C., and it was confirmed that the heat dissipation effect of the ultraviolet LEDs 11 was obtained.

As described above, the protective structure of the present invention is capable of both waterproofing and heat dissipation of the heat-generating parts, and can be suitably used in a liquid processing apparatus that is used while being immersed in a liquid.

The embodiment described above is an example of the aspect of the present invention, and the present invention is not limited to this aspect, and can be appropriately modified within the scope of the technical idea of the present invention. For example, the heat-generating component 10 is not limited to the one using the ultraviolet LED 11, and it goes without saying that the heat-generating component 10 can be appropriately selected according to the application of the device adopting the protective structure of the present invention. Depending on the desired heat dissipation performance, the shape adopted in various heat sinks can be appropriately selected and used.

The protective structure of the present invention can be suitably applied to a liquid treatment device, a liquid sterilization device, a liquid concentration control device, a lighting device, etc., which are used while immersed in a liquid. In addition, even if it is not immersed in a liquid, it can be suitably used in an environment where protection of heat-generating parts and heat dissipation are required, such as dust proofing.

10 Exothermic part 11 Ultraviolet LED
12 Wiring board 20 Heat dissipation member 21 First region 22 Second region 25 Transition part 201 Cylindrical projecting part 202 Body part 203 Disc part 30 Sealing member 40 Connecting member 41 Pipe joint 42 Fixing screw 43 Male screw part 50 Power line 51 Jacket 60 Holding member 61 Holding hole 62 Channel hole 70 Channel 100 Liquid treatment device

Claims (13)

A protective structure for heat-generating components,
Having a heat dissipation member having a first region on one end side and a second region on the other end side,
The heat-generating component is installed in the first region,
the sealing member accommodates at least a portion of the first region therein;
The connecting member accommodates therein a transition portion from the first region to the second region of the heat radiating member, and
The protective structure, wherein the sealing member is watertightly fixed to one end of the connecting member, and the second region of the heat radiating member is watertightly fixed to the other end of the connecting member. 2. The protective structure according to claim 1, wherein said connecting member is a pipe joint. A protective structure for heat-generating components,
Having a heat dissipation member having a first region on one end side and a second region on the other end side,
The heat dissipation member is configured by combining a first member having a region to be the first region and a second member having a region to be the second region,
The heat-generating component is installed in the first region,
the sealing member accommodates at least a portion of the first region therein;
The connecting member accommodates therein a transition portion from the first region to the second region of the heat radiating member, and
The protective structure, wherein the sealing member is watertightly fixed to one end of the connecting member, and the second region of the heat radiating member is watertightly fixed to the other end of the connecting member. 4. Protective structure according to claim 3, characterized in that said connecting member is a pipe joint. A protective structure for a light emitting element,
Having a heat dissipation member having a first region on one end side and a second region on the other end side,
The light emitting element is installed in the first region,
the sealing member is made of a translucent material and accommodates at least part of the first region therein;
The pipe joint accommodates therein a transition portion from the first region to the second region of the heat radiating member, and
The protective structure, wherein the sealing member is watertightly fixed to one end side of the pipe joint, and the second region of the heat radiating member is watertightly fixed to the other end side of the pipe joint. 6. The protective structure according to claim 5, characterized in that it is used in an environment in which liquid is present and at least part of said second region is in contact with said liquid. 7. A liquid treatment apparatus having the protection structure according to claim 6 and performing a predetermined treatment on the liquid. A protective structure for a light emitting element,
Having a heat dissipation member having a first region on one end side and a second region on the other end side,
The heat dissipation member is configured by combining a first member having a region to be the first region and a second member having a region to be the second region,
The light emitting element is installed in the first region,
the sealing member is made of a translucent material and accommodates at least part of the first region therein;
The pipe joint accommodates therein a transition portion from the first region to the second region of the heat radiating member, and
The protective structure, wherein the sealing member is watertightly fixed to one end side of the pipe joint, and the second region of the heat radiating member is watertightly fixed to the other end side of the pipe joint. 9. Protective structure according to claim 8, characterized in that it is used in an environment in which liquid is present and at least part of said second region is in contact with said liquid. 10. A liquid treatment apparatus having the protection structure according to claim 9 and performing a predetermined treatment on the liquid. A protective structure comprising a plurality of protective structures according to any one of claims 1 to 5 and 8 fixed to a holding member. 12. The protective structure according to claim 11, characterized in that it is used in an environment in which liquid is present and at least part of said holding member is in contact with said liquid. 13. A liquid treatment apparatus having the protection structure according to claim 12 and performing a predetermined treatment on the liquid.

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