Fluid treatment device with fluid branching and converging means

Abstract

The present disclosure relates to a fluid treatment device having fluid branching and converging members. The fluid treatment device includes a housing separated by a fluid treatment region, a fluid inlet region on an upstream side of the fluid treatment region and having a fluid inlet, and a fluid outlet region on a downstream side of the fluid treatment region and having a fluid outlet; a hollow fluid channel tube disposed in the fluid treatment region of the housing; an ultraviolet emitting unit disposed in the fluid outlet region of the housing; and a fluid branching and converging member disposed above the fluid inlet region and the fluid treatment region of the housing and fixed to the housing by ribs.

Description

Technical Field

[0001] The presently disclosed subject matter relates to fluid treatment devices utilizing ultraviolet light. Background Art

[0002] Generally, a fluid processing apparatus using ultraviolet (UV) light is used as a fluid sterilizer, a fluid disinfector, a fluid purifier, or the like.

[0003] Fig.10 is a longitudinal sectional view showing a fluid treatment device of the prior art (see: JP2017-51290A).

[0004] exist Fig.10 In the embodiment of the present invention, the fluid treatment device is divided by a fluid treatment area A, a fluid inlet area B on the upstream side of the fluid treatment area A, and a fluid outlet area C on the downstream side of the fluid treatment area A. In addition, in more detail, the fluid treatment device is composed of the following elements: a hollow fluid channel tube 101 disposed in the fluid treatment area A; a rectifying plate 102 having a plurality of small circular openings 102a used as a rectifying mechanism at the upstream side edge of the hollow fluid channel tube 101 between the fluid inlet area B and the fluid treatment area A; and an ultraviolet (UV) emitting unit 103, which includes an ultraviolet emitting element such as an ultraviolet (light) emitting (device) (UV-LED) element 103a disposed between the downstream side edge of the hollow fluid channel tube 101 and the fluid outlet OUT for emitting ultraviolet rays, a rod lens 103b, and an ultraviolet window 103c. The treated water W enters a housing (not shown) on the side of the fluid inlet IN, and is then rectified by the rectifying plate 102, so that the treated water W flows in parallel in a laminar state in the hollow fluid channel tube 101. As a result, the treated water W is effectively irradiated with ultraviolet rays UV parallel to the axial direction of the hollow fluid channel tube 101, thereby improving the treatment efficiency of the fluid treatment device. Then, the treated water W passes through the side of the ultraviolet emitting unit 103. Finally, the treated water W is discharged from the fluid outlet OUT. Note that the ultraviolet emitting unit 103 is formed of a waterproof structure to prevent water from penetrating therein.

[0005] However, in Fig.10 In the fluid treatment device, the ultraviolet rays UV leak from the small circular opening 102a, and further leak from the joint of the housing (not shown) to the outside. As a result, the leaked ultraviolet rays UV affect the human body, and the pipe connected to the joint is damaged due to the leaked ultraviolet rays UV.

[0006] In addition, Fig.10 In the fluid treatment device of the embodiment, the diameter of each small circular opening 102a is small, that is, about 2 mm, so as to generate a laminar flow in the fluid treatment area A. Therefore, the area is greater than about 3.14 mm of the area of ​​each small circular opening 102a.2 Foreign matter will be blocked in the small circular opening 102a. In particular, long and thin hair, flat scales, etc. will be blocked in the small circular opening 102a. As a result, the pressure loss of the device will increase. Moreover, the flow of the treated water W will be hindered by the blocked small circular opening 102a. In addition, the blocked small circular opening 102a will be a hotbed for bacteria, etc.

[0007] In addition, Fig.10 In the fluid treatment device, since the flow velocity of the treated water W along the wall of the hollow fluid channel tube 101 is suppressed by the rectifying plate 102 compared with the flow velocity of the treated water W along the central axis of the hollow fluid channel tube 101, the flow velocity of the treated water W in the hollow fluid channel tube 101 will be uneven. Summary of the invention

[0008] The presently disclosed subject matter seeks to address one or more of the above-mentioned problems.

[0009] According to the subject matter disclosed at present, a fluid treatment device includes: a shell, the shell is divided by a fluid treatment area, a fluid inlet area on the upstream side of the fluid treatment area and having a fluid inlet, and a fluid outlet area on the downstream side of the fluid treatment area and having a fluid outlet; a hollow fluid channel tube, the hollow fluid channel tube is arranged in the fluid treatment area of ​​the shell; an ultraviolet emitting unit, the ultraviolet emitting unit is arranged in the fluid outlet area of ​​the shell; a fluid branching and merging member, the fluid branching and merging member is arranged above the fluid inlet area and the fluid treatment area of ​​the shell and is fixed to the shell by ribs. The inner diameter of the shell in the fluid treatment area is greater than the inner diameter of the fluid inlet. The fluid branching and merging member includes: an ultraviolet absorption and fluid branching member, the ultraviolet absorption and fluid branching member having a first conical structure, the first conical structure having a first vertex opposite to the fluid inlet and a first vertical angle of the first vertex; and an ultraviolet reflection and fluid merging member, the ultraviolet reflection and fluid merging member having a second conical structure, the second conical structure having a second vertex opposite to the fluid outlet and a second vertical angle of the second vertex, the second vertical angle being smaller than the first vertical angle. The bottom surface of the ultraviolet absorbing and fluid branching member is fixed to the bottom surface of the ultraviolet reflecting and fluid merging member.

[0010] According to the presently disclosed subject matter, since ultraviolet rays are reflected and absorbed by the fluid branching and merging member, and ultraviolet rays are hardly leaked from the outer periphery of the fluid branching and merging member, ultraviolet rays leaking to the outside are reduced. Therefore, the leaked ultraviolet rays hardly affect the human body, and the pipe connected to the joint is not damaged.

[0011] Moreover, since the openings of the fluid branching and merging members adjacent to the ribs are radially longer and circumferentially wider, the openings can be larger than the small circular openings of the prior art, with an area larger than 3.14 mm 2 Foreign matter will not get stuck in the radially long and circumferentially wide opening. In particular, long and thin hairs, flat scales, etc. will not get stuck in the radially long and circumferentially wide opening. As a result, the pressure loss of the device will not increase. Moreover, the treated water flow will not be hindered by the radially long and circumferentially wide opening. In addition, there is no hotbed for bacteria, etc.

[0012] In addition, since the suppression of the flow velocity of the treated water along the wall of the hollow fluid channel tube can be less than the suppression of the flow velocity of the treated water in the center of the hollow fluid channel tube, the maximum flow velocity of the treated water can be small enough to make the flow velocity distribution in the hollow fluid channel tube uniform, and the pressure loss can also be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The above and other advantages and features of the presently disclosed subject matter will be more apparent from the following description of certain embodiments compared to the prior art, in conjunction with the accompanying drawings, in which:

[0014] Figure 1 is a longitudinal cross-sectional view showing an embodiment of a fluid treatment device according to the presently disclosed subject matter;

[0015] Figure 2A It is used to illustrate Figure 1 A longitudinal cross-sectional view of the ultraviolet reflection / transmission characteristics of the fluid branching and merging components;

[0016] Figure 2B It is shown Figure 1 Figure 1 shows a simulated UV leakage of a fluid handling device;

[0017] Figure 2C It is shown Fig.10 Figure 1 shows a simulated UV leakage of a fluid handling device;

[0018] Figure 3A It is used to illustrate Figure 1 A partial longitudinal cross-sectional view of the radial length and circumferential width of an opening of a fluid treatment device;

[0019] Figure 3B It is along Figure 3A A cross-sectional view taken along line B-B of ;

[0020] Figure 4A It is used to illustrate Figure 1 A longitudinal cross-sectional view of a flow rate of a fluid treatment device;

[0021] Figure 4B It is shown Figure 4AA graph of the total fluid channel cross-section in the fluid treatment device and the average flow rate of the treated water;

[0022] Figure 5 It is shown Figure 1 FIG. 1 is a diagram of a fluid analysis (Fluent) result of a longitudinal fluid flow velocity distribution of a fluid treatment device and an amplified distribution thereof, wherein when the average flow velocity of the treated water W in the fluid treatment area A is 8 L / min, the UV ray reflecting and fluid merging components are plate-shaped, hemispherical and conical, respectively;

[0023] Figure 6 It is shown Figure 1 FIG. 1 is a diagram of a fluid analysis (Fluent) result of a longitudinal fluid flow velocity distribution of a fluid treatment device and an amplified distribution thereof, wherein when the average flow rate of the treated water W in the fluid treatment area A is 8 L / min, the vertical angles β of the UV ray reflection and fluid merging components are 80°, 90° and 60°, respectively;

[0024] Figure 7 It is shown Figure 1 FIG. 1 is a diagram of a fluid analysis (Fluent) result of a longitudinal fluid flow velocity distribution of a fluid treatment device and an amplified distribution thereof, wherein when the average flow rate of the treated water W in the fluid treatment area A is 8 L / min, the inner edge surfaces of the hollow fluid channel tube are a flat surface, a C30° surface, and an R30 mm surface, respectively;

[0025] Figure 8 It is shown Figure 1 A side view of a first variation of a fluid branching and merging member;

[0026] Fig. 9 It is shown Figure 1 a side view of a second variation of a fluid branching and merging member; and

[0027] Fig.10 is a longitudinal view showing a fluid treatment device of the prior art. DETAILED DESCRIPTION

[0028] Figure 1 is a longitudinal cross-sectional view showing an embodiment of a fluid treatment device according to the presently disclosed subject matter.

[0029] exist Figure 1In the embodiment, the fluid treatment device is divided by a fluid treatment area A, a fluid inlet area B on the upstream side of the fluid treatment area A, and a fluid outlet area C on the downstream side of the fluid treatment area A. In addition, in more detail, the fluid treatment device is composed of the following elements: a shell (or reactor) 1 disposed above the fluid inlet area B, the fluid treatment area A, and the fluid outlet area C; a shell 1' disposed in the fluid outlet area C; a hollow fluid channel tube 2 in the fluid treatment area A; a fluid branching and merging member 3 serving as a rectifying mechanism in the shell 1 above the fluid treatment area A; an ultraviolet emitting unit 4 located in the shell 1 in the fluid outlet area C; a fluid inlet IN disposed in the upstream side edge of the shell 1 in the fluid inlet area B; and a fluid outlet OUT disposed in the downstream side edge of the shell 1'.

[0030] The shells 1 and 1' are made of metal or an ultraviolet absorbing resin such as polypropylene (PP) and are used in combination as one shell. The shells 1 and 1' are separated from each other to incorporate the ultraviolet emitting unit 4 therein. The diameter of the shell 1 in the fluid inlet area B around the fluid inlet IN is small enough to increase the average flow rate of the treated water W. In addition, the diameter of the shell 1 in the fluid treatment area A is made larger than the diameter of the shell 1 around the fluid inlet IN to reduce the average flow rate of the treated water W. On the other hand, the diameter of the shell 1 in the fluid outlet area C on the side of the fluid treatment area A is larger than the diameter of the shell 1 in the fluid treatment area A, thereby accommodating the ultraviolet emitting unit 4 in the fluid outlet area C.

[0031] The hollow fluid channel tube 2 is made of an ultraviolet reflective material such as polytetrafluoroethylene (PTFE). The inner edge of the hollow fluid channel tube 2 on the fluid inlet IN side is made into a curved surface by a circular (R) surface 2a, and the R surface 2a is represented by R30mm with a radius of 30mm, for example. In other words, in the case of R30mm, R30mm shows a curved surface by a portion of the periphery having a radius of 30mm in its cross section. The flow velocity of the treated water W is caused by the friction of the R surface 2a, so that the flow velocity of the treated water W at the central axis of the fluid treatment area A is suppressed. As a result, the fluid channel cross-section S in the fluid treatment area A gradually increases, so that the average flow velocity of the treated water W in the fluid treatment area A gradually increases. Therefore, in the fluid treatment area A on the downstream side of the R surface 2a, the flow velocity distribution of the treated water W can be uniform.

[0032] The fluid branching and merging member 3 is composed of a conical ultraviolet absorption and fluid branching member 31 and a conical ultraviolet reflection and fluid merging member 32. The conical ultraviolet absorption and fluid branching member 31 has a vertex A opposite to the fluid inlet IN of the fluid inlet area B. α and vertex A αThe conical ultraviolet reflection and fluid confluence member 32 has a vertex A opposite to the fluid outlet OUT of the fluid outlet area C. β and vertex A β vertical angle β (<α). In this case, the bottom of the conical ultraviolet absorption and fluid branching member 31 is connected to the mirror adhesion of the bottom of the conical ultraviolet reflection and fluid merging member 32 by an O-ring 33. In addition, the inner diameter D1 of the fluid inlet IN is smaller than the inner diameter D2 formed at the fluid inlet IN by extending along the envelope of the cone of the conical ultraviolet absorption and fluid branching member 31, so that the treated water W does not vertically collide with the conical ultraviolet absorption and fluid branching member 31, thereby not generating convection. In addition, the maximum outer diameter of the fluid branching and merging member 3 is larger than the inner diameter of the shell 1. The conical ultraviolet absorption and fluid branching member 31 is made of an ultraviolet reflecting material such as PP, and the conical ultraviolet reflecting and fluid merging member 32 is made of an ultraviolet reflecting material such as PTFE. The fluid branching and merging member 3 is fixed to the shell 1 by the three ribs of the conical ultraviolet absorption and fluid branching member 31, so that three radially long and circumferentially wide openings 31b are formed between the ribs 31a (see Figure 3B ). It is preferred that the rib 31a is provided on the upstream-side conical ultraviolet absorption and fluid branching member 31 in consideration of the sealing property; however, the rib 31a may be provided on the downstream-side conical ultraviolet reflection and fluid converging member 32. The number of the ribs 31a is 2 or more; however, since the greater the number of the ribs 31a, the smaller the total cross-section of the treated water W, the number of the ribs 31a is preferably three. As a result, long and thin hairs, flat scales, and foreign matter pass through the radially long and circumferentially wide opening 31b (see Figure 3B On the other hand, the treated water W sucked at the fluid inlet IN passes through the housing 1 in the fluid inlet region B, and then passes through the radially long and circumferentially wide opening 31b on one side of the fluid branching and merging member 3 (see Figure 3B ). In addition, the treated water W passes through the housing 1 in the fluid treatment area A, and then passes through the side of the ultraviolet emitting unit 4. Finally, the treated water W is discharged from the fluid outlet OUT. In this case, the average flow rate of the treated water W is reduced by the conical ultraviolet absorption and fluid branching member 31, and then, the average flow rate of the treated water W is reduced by the radially long and circumferentially wide opening 31b between the ribs 31a. Finally, the average flow rate of the treated water W is gradually reduced by the conical ultraviolet reflection and fluid converging member 32, so that the flow rate of the treated water W is uniform, thereby achieving a laminar flow state of the flow rate of the treated water W.

[0033] exist Figure 1 Note that the end 2a of the R surface 2a e Located at the vertex A of the conical ultraviolet reflection and fluid converging member 32 βHowever, the end 2a of the R surface 2a e It can be located at the vertex A of the conical ultraviolet reflection and fluid confluence member 32 β downstream side.

[0034] The ultraviolet emitting unit 4 has an ultraviolet (light) emitting (device) LED element 4a and an ultraviolet window 4b, which cannot be immersed in the treated water W due to the waterproof structure. The LED element 4a emits ultraviolet UV with a wavelength of about 200nm to 350nm. In particular, deep ultraviolet DUV with a short wavelength of about 210nm to 300nm can be used for disinfection, sterilization, purification, etc.

[0035] exist Figure 1 In the embodiment, the ultraviolet light UV from the ultraviolet emitting unit 4 passes through the hollow fluid channel tube 2 and is then reflected by the conical ultraviolet reflection and fluid confluence member 32 to improve the utilization efficiency of the ultraviolet light UV, which can improve the disinfection efficiency, etc. In this case, the ultraviolet light UV that is not reflected by the conical ultraviolet reflection and fluid confluence member 32 is absorbed by the conical ultraviolet reflection and fluid confluence member 32 itself and the conical ultraviolet absorption and fluid branching member 31, so that the ultraviolet light UV can be attenuated. Moreover, since the maximum diameter of the fluid branching and confluence member 3 is larger than the inner diameter of the housing 1 in the fluid inlet area B, it is possible to prevent the ultraviolet light UV emitted from the ultraviolet emitting unit 4 from passing through the fluid inlet IN to the outside.

[0036] Will refer to Figure 2A , Figure 2B and Figure 2C illustrate Figure 1 Leakage of ultraviolet light (UV) in fluid handling devices.

[0037] like Figure 2AAs shown, the ultraviolet rays UV are diffusely reflected by the conical ultraviolet reflection and fluid confluence member 32, and then the ultraviolet rays UV are absorbed by the conical ultraviolet absorption and fluid branching member 31. For example, when the conical ultraviolet reflection and fluid confluence member 32 located at the same axis of the housing 1 in the fluid inlet area B is made of 10 mm thick PTTE, the reflectivity R2 is about 99.84%, and the transmittance T2 is about 0.16%, so that most of the ultraviolet rays UV are reflected by the conical ultraviolet reflection and fluid confluence member 32. On the other hand, when the conical ultraviolet absorption and fluid branching member 31 located at the same axis of the housing 1 in the fluid inlet area B is made of 5 mm thick PP, the transmittance T1 is about 0.16%. As a result, the leakage of the ultraviolet rays UV from the fluid inlet IN through the fluid branching and confluence member 3 is suppressed to less than about 0.0003%. On the other hand, the ultraviolet rays UV passing through the opening 31b that is long in the radial direction and wide in the circumferential direction are reflected from the inner surface of the housing 1 in the fluid inlet IN toward the conical ultraviolet absorption and fluid branching member 31, and then absorbed by the conical ultraviolet absorption and fluid branching member 31.

[0038] like Figure 2B As shown, it shows Figure 1 The simulated optical analysis (ASAP) results of the leakage of ultraviolet light UV at the fluid inlet IN of the fluid treatment device are shown in Figure 1. The leakage illumination LI at the fluid inlet IN is 0.05 mW / cm 2 On the other hand, Figure 2C As shown, it shows Fig.10 The simulated optical analysis (ASAP) result of the leakage of ultraviolet light UV at the fluid inlet IN of the prior art fluid treatment device is shown in FIG. 1 . The leakage illumination LI at the fluid inlet IN is 0.5 mW / cm 2 That is, Fig.10 Compared with the fluid treatment device of the prior art, the leakage of ultraviolet light UV at the fluid inlet IN is reduced to about 1 / 20, which represents a great improvement.

[0039] refer to Figure 3A and Figure 3B Detailed description Figure 1 The radial length and circumferential width of the opening 31b. Here, Figure 3A yes Figure 1 A partial longitudinal view of a fluid handling device, Figure 3B It is along Figure 3A A cross-sectional view taken along line BB.

[0040] like Figure 3A and Figure 3BAs shown, the ultraviolet absorption and fluid branching member 31 has three equidistant ribs 31a, which form three radially long and circumferentially wide openings 31b having a radial length L and a circumferential width WW. For example, when the inner diameter of the housing 1 is 36 mm and the outer diameter of the conical ultraviolet absorption and fluid branching member 31 is 26 mm, the radial length L and the circumferential width WW are 5 mm and 32 mm respectively, the area of ​​each radially long and circumferentially wide opening 31b is approximately Fig.10 The opening 102a (whose area is 3.14mm 2 ). Therefore, the area is about 142mm 2 Foreign matter such as long and thin hair, flat scales, etc. can be easily transmitted through the radially long and circumferentially wide openings 31b. Therefore, the radially long and circumferentially wide openings 31b are hardly blocked. As a result, the pressure loss is small, so that the treated water W can flow easily, and there is no breeding ground for bacteria, etc. Note that when the radial length L of the radially long and circumferentially wide openings 31b is 5mm, all the radially long and circumferentially wide openings 31b have the following total cross-section:

[0041] 142mm 2 ×3=426mm 2

[0042] In this case, if Figure 4B As shown, the minimum cross-section MIN of the treated water W in the fluid treatment area A is:

[0043] Minimum value = 426mm 2

[0044] In contrast, Fig.10 In the fluid treatment device, the total cross-section of the treated water W in the rectifying plate 102 is:

[0045] 3.14mm 2 ×12=41mm 2

[0046] And it is much smaller than the minimum cross-section MIN of the treated water W in the opening 31b of radial length and circumferential width.

[0047] Now refer to Figure 4A and Figure 4B illustrate Figure 1 Here, Figure 4A is a partial longitudinal cross-sectional view showing the flow velocity V of the treated water W, Figure 4B is a graph showing the total cross section S of the treated water W and the average flow velocity MV.

[0048] The total cross-section S and the average flow velocity MV have the following relationship:

[0049] S·MV=Q

[0050] Wherein Q is the flow rate of treated water W, which is a fixed value such as 8 L / min.

[0051] First, from x=0 at the fluid inlet IN to the vertex A of the ultraviolet absorption and fluid branching member 31 α At x = x1, the total cross-section S of the treated water W is determined, i.e., about 220 mm 2 As a result, the mean flow velocity MV is also determined, which is about 0.61 m / s.

[0052] Next, from x=x1 to x=x2 where the rib 31a is located, the treated water W contacts the conical ultraviolet absorbing and fluid branching member 31, so that the total cross section S of the treated water W increases rapidly. As a result, the average flow velocity MV of the treated water W decreases rapidly.

[0053] Next, from x=x2 to x=x3 where the upstream side of the conical ultraviolet reflecting and fluid merging member 32 is located, the total cross section S of the treated water W decreases rapidly due to the presence of the ribs 31a. As a result, the average flow velocity MV of the treated water W increases rapidly.

[0054] Next, from x=x3 to the vertex A of the conical ultraviolet reflection and fluid confluence member 32 β Where x = x4, the total cross-section S of the treated water W is about 410 mm 2 Gradually increases to about 620mm 2 As a result, the average flow velocity MV of the treated water W gradually decreases to about 0.32 m / s. Note that the curved surface of the R surface 2a contributes to this gradual increase in the total cross-section S, ie, the gradual decrease in the average flow velocity MV.

[0055] Finally, the total cross-section S of the treated water W is determined, which is about 620 mm 2 As a result, the mean flow velocity MV is also determined, which is about 0.22 m / s.

[0056] Therefore, according to Figure 4A and Figure 4B , the average flow velocity MV is rapidly reduced by the conical ultraviolet absorption and fluid branching member 31, and then gradually reduced by the conical ultraviolet reflection and fluid converging member 32. Finally, from x=x4, the average flow velocity MV is determined to improve the treatment efficiency.

[0057] Now refer to Figure 5 illustrate Figure 1 The rectifying effect of the fluid handling device is assumed to be Figure 1The ultraviolet reflection and fluid converging components have a plate structure, a hemispherical structure and a conical structure, respectively, to obtain a fluid analysis (Fluent) result under the condition that the flow rate of the treated water W is 8 L / min.

[0058] like Figure 5 As shown, if the ultraviolet reflecting and fluid converging member is plate-shaped or hemispherical, the total cross-section S of the treated water W increases rapidly, thereby generating a stagnant area SR where the flow velocity V is 0. In contrast, when the ultraviolet reflecting and fluid converging member according to the presently disclosed subject matter is conical, the total cross-section S of the treated water W increases gradually due to the conical structure, thereby not generating a stagnant area SR.

[0059] Now refer to Figure 6 illustrate Figure 1 The rectifying effect of the fluid handling device is assumed to be Figure 1 The ultraviolet reflecting and fluid converging member has vertex β values ​​of 180°, 90° and 60°, respectively, to obtain a fluid analysis (Fluent) result under the condition that the flow rate of the treated water W is 8 L / min.

[0060] like Figure 6 As shown, if the vertex β of the ultraviolet reflection and fluid confluence member is 180° or 90°, the total cross-section S of the treated water W increases rapidly, thereby generating a stagnant area SR where the flow velocity V is 0. In contrast, when the vertex β of the ultraviolet reflection and fluid confluence member according to the presently disclosed subject matter is 60°, the total cross-section S of the treated water W gradually increases due to the vertex β (=60°), thereby not generating a stagnant area SR. In this case, considering the rectifying effect and the average flow velocity MV, the vertex β is preferably 45° to 80°; however, for the vertex β, 60° is optimal.

[0061] Now refer to Figure 7 illustrate Figure 1 The rectifying effect of the fluid handling device is assumed to be Figure 1 The inner edge surfaces of the hollow fluid channel tube respectively have a flat surface, a cutout (C) 30° surface and an R30mm surface to obtain a fluid analysis (Fluent) result under the condition that the flow rate of the treated water W is 8 L / min.

[0062] like Figure 7As shown, if the inner edge surface of the hollow fluid channel tube 2 is a flat surface, the fluid inlet side edge of the hollow fluid channel tube 2 resists the treated water W, making the flow rate of the treated water W uneven. As a result, the maximum flow rate MAXV at the transverse section T in the fluid treatment area A is 0.49m / s. In addition, if the inner edge surface of the hollow fluid channel tube 2 is a C30° surface, the fluid inlet side edge of the hollow fluid channel tube 2 is less tolerant to the treated water W than the inner edge surface of the flat surface. However, the treated water W will collide with the C30° surface, and the flow rate of the treated water W will still fluctuate. As a result, the maximum flow rate MAXV at the transverse section T in the fluid treatment area A is 0.31m / s. In contrast, when the inner edge surface of the hollow fluid channel tube 2 is an R30mm surface, the total cross-section of the treated water gradually increases, so that the friction of the hollow fluid channel tube 2 suppresses the flow rate V along the side wall of the hollow fluid channel tube 2 compared with the flow rate at the center of the hollow fluid channel tube 2. As a result, the flow velocity in the fluid treatment area A becomes uniform, so that the maximum flow velocity MAXV is 0.27 m / s at the transverse section T. Therefore, the treatment efficiency can be improved.

[0063] Instead of polypropylene (PP), the conical ultraviolet absorption and fluid branching member 31 can be made of a resin such as polyphenylene sulfide (PPS) and other ultraviolet absorption members such as chromium, black aluminum oxide and carbon black. In addition, weathering additives, glass fillers, titanium oxide or zinc oxide can be added to prevent resin degradation. In addition, non-ultraviolet transmission materials such as SUS and anodized aluminum can be used.

[0064] Instead of polytetrafluoroethylene (PTFE), the conical ultraviolet reflecting and fluid joining member 32 may be made of fluororesin such as tetrafluoroethylene·perfluoroalkyl vinyl ether (PFA) copolymer, tetrafluoroethylene·hexafluoropropylene (FEP) copolymer, polychlorotrifluoroethylene (PCTFE) or polyvinylidene fluoride (PVDF).

[0065] In the above-mentioned embodiment, the conical ultraviolet absorption and fluid branching member 31 is a linearly changing conical shape; however, it is possible to use a conical shape such as Figure 8 The tapered ultraviolet absorption and fluid branching member 31' shown is a tapered shape that changes stepwise. In this case, since the contact area between the treated water W and the tapered ultraviolet absorption and fluid branching member 31' can be increased to increase the amount of reduction in the flow rate of the treated water W, this improves the rectifying effect. Note that the tapered ultraviolet reflection and fluid converging member 32 should not be a stepped tapered shape in consideration of the uneven flow rate. Therefore, the tapered ultraviolet absorption and fluid branching member 31 and the tapered ultraviolet reflection and fluid converging member 32 can be simple tapered shapes.

[0066] In addition, the conical ultraviolet absorption and fluid branching member 31 can be made of the same ultraviolet reflection material as the conical ultraviolet reflection and fluid confluence member 32. Of course, the leakage amount of ultraviolet rays will increase, which will not cause problems. In this case, when the conical ultraviolet absorption and fluid branching member 31 and the conical ultraviolet reflection and fluid confluence member 32 are made of a single material, the manufacturing loss can be reduced.

[0067] In addition, if Fig. 9 As shown, the conical ultraviolet absorption and fluid branching component 31 can be formed by a polygonal conical component 31" (for example, a first triangular pyramidal component having a first bottom surface), and the conical ultraviolet reflection and fluid converging component 32 can be formed by a second polygonal conical component 32", and the second bottom surface is connected to the first bottom surface by an O-ring 33.

[0068] The fluid handling device can be applied to water storage tanks such as ice makers, water pipes, hot water suppliers, water servers, cooling water circulators, water coolers, beverage servers, medical pure water production units, dental chairs, and dishwashers.

[0069] It will be apparent to those skilled in the art that various modifications and variations may be made in the presently disclosed subject matter without departing from the spirit or scope of the presently disclosed subject matter. Therefore, the presently disclosed subject matter is intended to cover modifications and variations of the presently disclosed subject matter as long as they are within the scope of the appended claims and their equivalents. All related or prior art references described above and in the background section of this specification are incorporated herein by reference in their entirety.

[0070] CROSS-REFERENCE TO RELATED APPLICATIONS

[0071] This application claims priority from Japanese patent application JP2023-146759 filed on September 11, 2023, the disclosure of which is incorporated herein by reference in its entirety.

Claims

1. A fluid processing device, comprising: a housing divided by a fluid treatment region, a fluid inlet region on an upstream side of the fluid treatment region and having a fluid inlet, and a fluid outlet region on a downstream side of the fluid treatment region and having a fluid outlet; a hollow fluid channel tube disposed in the fluid processing region of the housing; an ultraviolet emitting unit, the ultraviolet emitting unit being disposed in the fluid outlet region of the housing; as well as a fluid branching and merging member disposed above the fluid inlet region and the fluid processing region of the housing and fixed to the housing by ribs, The inner diameter of the housing in the fluid processing area is larger than the inner diameter of the fluid inlet. The fluid branching and merging member comprises: an ultraviolet absorbing and fluid branching member having a first conical structure having a first vertex opposite to the fluid inlet and a first vertical angle of the first vertex; and an ultraviolet reflection and fluid converging member, the ultraviolet reflection and fluid converging member having a second conical structure, the second conical structure having a second vertex opposite to the fluid outlet and a second vertical angle of the second vertex, the second vertical angle being smaller than the first vertical angle, The bottom surface of the ultraviolet absorbing and fluid branching member is fixed to the bottom surface of the ultraviolet reflecting and fluid merging member.

2. The fluid treatment device according to claim 1, wherein: The second vertex is 45° to 80°.

3. The fluid treatment device according to claim 1, wherein: The inner edge surface of the hollow fluid channel tube on the fluid inlet side forms a curved surface so that the fluid channel cross section gradually decreases from the inner edge surface on the fluid inlet side to the ultraviolet reflection and fluid merging member.

4. The fluid treatment device according to claim 1, wherein: The inner diameter of the fluid inlet is smaller than the inner diameter formed at the fluid inlet by extension of the envelope of the first conical structure.

5. The fluid processing device according to claim 1, wherein: The first tapered structure includes a stepped tapered structure.

6. The fluid treatment device according to claim 1, wherein: The first cone-shaped structure includes a circular or polygonal cone-shaped structure.

7. The fluid treatment device according to claim 1, wherein: The second cone-shaped structure includes a circular or polygonal cone-shaped structure.

8. The fluid treatment device according to claim 1, wherein: The UV absorbing and fluid branching member and the UV reflecting and fluid joining member include the same UV reflecting material.

9. The fluid treatment device according to claim 8, wherein: The UV absorbing and fluid branching member and the UV reflecting and fluid merging member include a single UV reflecting material.

10. The fluid treatment device according to claim 1, wherein: The ribs are mounted on the ultraviolet absorbing and fluid branching member.

11. The fluid treatment device according to claim 1, further comprising an O-ring interposed between the ultraviolet absorbing and fluid branching member and the ultraviolet reflecting and fluid merging member.

12. The fluid treatment device according to claim 1, wherein: The hollow fluid channel tube includes an ultraviolet reflecting material.

13. The fluid treatment device according to claim 1, wherein: The housing includes a first housing disposed above the fluid inlet area, the fluid processing area, and the fluid outlet area, and a second housing disposed above the fluid outlet area, the first housing and the second housing being separated from each other to combine the ultraviolet emitting unit.

14. The fluid treatment device according to claim 13, wherein: A diameter of the first housing in the fluid outlet region on the fluid processing region side is larger than a diameter of the first housing in the fluid processing region to accommodate the ultraviolet emitting unit in the fluid outlet region.

15. The fluid treatment device according to claim 1, wherein: The maximum outer diameter of the fluid branching and merging member is greater than the inner diameter of the housing in the fluid inlet region.

16. The fluid treatment device according to claim 1, wherein: The ultraviolet absorbing and fluid branching member includes a first polygonal cone member having a first bottom surface, and the ultraviolet reflecting and fluid joining member includes a second polygonal cone member having a second bottom surface coupled to the first bottom surface.

Images