Electrolytic biocide generating device

Abstract

A biocide generating device, comprising: a housing defining an inlet and an outlet for allowing water to pass through the housing; and an electrode arrangement for generating a biocide in the water passing through the housing. The housing includes a tank having an open end and a closed end, where the tank defines an inlet and an outlet. The shell further comprises a removable cover used for covering the open end of the can body. Various components of the housing may have molded plastic constructions with stiffeners to improve strength and durability. A circuit arrangement for controlling operation of an electrode arrangement, the circuit arrangement may be housed within a circuit housing, the circuit housing being removably mounted on a cover of the housing.

Description

Cross Reference to Related Applications

[0001] This application claims the benefit of U.S. Provisional Application Serial No. 63 / 518,420, filed August 9, 2023, the disclosure of which is incorporated by reference herein in its entirety. BACKGROUND

[0002] Biological growth can cause clogging of water systems and result in inefficient operation, overheating, and failure of equipment that relies on the water system, resulting in costly downtime and expensive repairs. For some applications, the problem of biological growth within water systems is addressed by periodic cleaning of the water system. Cleaning is expensive, time consuming, and often involves the use of irritating and hazardous chemicals. Improvements in this field are needed. SUMMARY

[0003] One aspect of the disclosure relates to a biocide generating device including a housing defining a chamber. The housing has a molded plastic construction including a plastic material defining a port in fluid communication with the chamber. The plastic material defines a helical thread within the port. A port reinforcement ring is integrated with the housing and surrounds a port axis of the port for reinforcing the plastic material of the housing defining the port. The port reinforcement ring has a metal construction. An electrode arrangement is positioned within the chamber for generating a biocide within the chamber.

[0004] Another aspect of this disclosure relates to a biocidal agent generating device comprising a housing defining a chamber and having a molded plastic construction. The housing includes a canister body having an open end and a closed end. The canister body has an inlet port and an outlet port in fluid communication with the chamber. The housing further includes a cover assembly adapted to be removably secured to the open end of the canister body to close the open end of the canister body. The cover assembly includes a molded plastic cap secured to the open end of the canister body by a molded plastic retaining ring fastened to the canister body to capture the molded plastic cap within a recess defined at the open end of the canister body. The recess is defined by an annular shoulder supporting a sealing ring, which is captured and compressed between the molded plastic cap and the annular shoulder. A reinforcing ring is molded within the molded plastic retaining ring. The reinforcing ring has a metallic construction and is positioned to coincide with the outer circumferential portion of the molded plastic cap when the cap assembly is mounted on the tank body. The outer circumferential portion of the molded plastic cap includes a portion of the molded plastic cap that abuts the sealing ring against the tank body. The biocidal agent generating device also includes an electrode arrangement positioned within the chamber for generating biocidal agent within the chamber.

[0005] Another aspect of this disclosure relates to a biocidal agent generating device comprising a molded plastic housing defining a chamber. The housing includes a canister body having an open end and a closed end. The canister body has an inlet port and an outlet port in fluid communication with the chamber. The housing further includes a cover assembly adapted to be removably secured to the open end of the canister body to close the open end of the canister body. The cover assembly includes a molded plastic cap secured to the open end of the canister body by a molded plastic retaining ring fastened to the canister body to capture the molded plastic cap within a recess defined at the open end of the canister body. The molded plastic retaining ring defines a fastener opening. The plastic retaining ring is secured to the canister body by a threaded fastener extending through the fastener opening and threadedly engaged within an internally threaded reinforcing insert molded within the canister body. The internally threaded reinforcing insert has a metallic construction and includes at least two outer annular ribs separated by an annular gap. During molding, plastic material from the can body flows into the annular gap to provide reinforced retention of the internally threaded reinforcing insert within the can body. The biocidal agent generating device also includes an electrode arrangement positioned within the chamber for generating biocidal agent within the chamber.

[0006] Another aspect of this disclosure relates to a biocidal agent generating device comprising a housing defining a chamber. The housing includes a canister body having an open end and a closed end. The canister body has an inlet port and an outlet port in fluid communication with the chamber. The housing also includes a canister lid adapted to be removably secured to the open end of the canister body to close the open end of the canister body. The biocidal agent generating device further includes: an electrode arrangement including a first electrode and a second electrode positioned within the chamber for generating a biocidal agent within the chamber; a circuit housing removably mounted on top of the canister lid, the circuit housing being able to be mounted on and removed from the canister lid while its interior remains closed; and a power cord extending into the circuit housing for providing power to the electrode arrangement. The biocidal agent generating device also includes a circuit arrangement housed within the circuit housing. The circuit arrangement includes a power conversion circuit for providing power conversion to the electrical power supplied from the power line to the electrode arrangement, and also includes a switching circuit for switching the polarity of the first electrode and the second electrode.

[0007] Various additional inventive aspects will be set forth in the following description. Aspects of the invention may relate to individual features and combinations thereof. It should be understood that both the foregoing general description and the following detailed description are exemplary and illustrative only, and do not limit the broad inventive concept upon which the embodiments disclosed herein are based. Attached Figure Description

[0008] The accompanying drawings illustrate several aspects of this disclosure and are incorporated in and constitute a part of this specification. A brief description of the drawings is as follows:

[0009] Figure 1 A water transport vehicle including an organic water-carrying system is shown, which incorporates a biocidal agent generating device according to the principles of this disclosure.

[0010] Figure 2 It describes what can be used for Figure 1 A perspective view of a biocidal agent generating apparatus in a system according to an embodiment of the present disclosure.

[0011] Figure 3 It describes Figure 2 A perspective view of the biocidal agent generating device.

[0012] Figure 4 It describes Figure 3 An exploded perspective view of the main body of the tank of a biological agent generating device.

[0013] Figure 5 It describes Figure 4 A sectional view of the main body of the tank.

[0014] Figure 6 It describes Figure 5 An enlarged anatomical view of a portion of the main body of the tank.

[0015] Figure 7 Through Figure 2 A cross-sectional view taken from the inlet and outlet of the biocidal agent generating device.

[0016] Figure 8 It describes Figure 7 An enlarged cross-sectional view of a part of a biological agent generating device.

[0017] Figure 9A It describes Figure 2 A cross-sectional view of the retaining ring of the biocidal agent generating device.

[0018] Figure 9B It describes what is suitable for strengthening Figure 9A A cross-sectional view of the reinforcing ring of the retaining ring.

[0019] Figure 10 Is it through Figure 2 A cross-sectional view of the upper part of the biocidal agent generating device.

[0020] Figure 11 It describes Figure 2 A perspective view of the fasteners and internally threaded inserts of the biocidal agent generating device.

[0021] Figure 12 This is an exploded view depicting another biocidal agent generating device based on the principles of this disclosure.

[0022] Figure 13 yes Figure 12 A schematic diagram of the circuit layout of the biocidal agent generating device.

[0023] Figure 14 yes Figure 12 A perspective view of a biocidal agent generating device.

[0024] Figure 15 yes Figure 14 A top view of the biocidal agent generating device.

[0025] Figure 16 yes Figure 14 Side view of the inlet of the biocidal agent generating device.

[0026] Figure 17 yes Figure 14 A partial exploded view of the biocidal agent generating device.

[0027] Figure 18 Depicting Figure 14 A biocidal agent generating device, wherein the control components of the biocidal agent generating device are removed from the tank cover of the main housing of the biocidal agent generating device.

[0028] Figure 19 It is along Figure 15 The section line 19-19 intercepts Figure 14 A cross-sectional view of a biocidal agent generating device.

[0029] Figure 20 It is along Figure 15 The section line 20-20 intercepts Figure 14 A cross-sectional view of a biocidal agent generating device.

[0030] Figure 21 yes Figure 14 A cross-sectional view of the circuit housing of a biocidal agent generating device, with the circuit arrangement removed.

[0031] Figure 22 Depicting Figure 21The circuit housing, in which the top dome has been removed to expose the circuit board, which supports... Figure 14 The circuit layout of the biological pesticide generating device.

[0032] Figure 23 Depicting Figure 22 The arrangement, in which the circuit boards were removed.

[0033] Figure 24 yes Figure 14 A top perspective view of the lower base of the circuit housing of the biocidal agent generating device.

[0034] Figure 25 This is a perspective view of the radiator, which is installed... Figure 14 Inside the circuit housing of the biological pesticide generating device.

[0035] Figure 26 schematically depicted Figure 14 An example of the heat flow path of a biocidal agent generating device.

[0036] Figure 27 Another control component based on the principles of this disclosure is depicted, which is shown having a corresponding tank cover and electrode arrangement.

[0037] Figure 28 yes Figure 27 An exploded view of the control components, showing the control components isolated from the tank cover and electrode arrangement.

[0038] Figure 29 yes Figure 27 Another exploded view of the control components.

[0039] Figure 30 It was installed on the tank lid. Figure 27 A cross-sectional view of the control components.

[0040] Figure 31 yes Figure 30 A magnified view of a portion of the image. Detailed Implementation

[0041] This disclosure relates to apparatus and systems for generating biocides for water treatment systems. Examples of biocides include chlorine and its derivatives, copper, and other biocides. Certain aspects of this disclosure relate to characteristics that enhance the robustness and lifespan of structural components, including biocide generating apparatus and systems. Exemplary aspects of this disclosure will now be referenced in detail to the accompanying drawings. Where possible, the same reference numerals will be used throughout the drawings to refer to the same or similar components.

[0042] One aspect of this disclosure relates to a biocidal agent generating apparatus comprising a composite housing defining an electrolytic cell chamber. Compared to an all-metal housing, the composite housing can have reduced weight and cost. In one example, the composite housing includes one or more reinforcing inserts that are at least partially embedded relative to one or more molded plastic parts (e.g., injection-molded plastic parts) of the composite housing. Example materials for the molded plastic parts may have a material composition comprising plastic materials such as polypropylene, polyamide, polycarbonate, or other plastic materials. The reinforcing inserts may be made of a material having a higher strength than the molded plastic material of the molded parts (e.g., a metallic material, such as a metal alloy (e.g., stainless steel) or a metallic element (e.g., titanium)). In one example, the composite housing may include a molded tank body and a cover assembly having an open end and an opposite closed end, the cover assembly being adapted to be removably secured to the open end of the tank body to close the open end of the tank body. The cover assembly can be selectively removed from the tank body for servicing the biocidal agent generating apparatus. In some embodiments, one or more reinforcing inserts may be configured to reinforce an internally threaded port (e.g., an inlet port, outlet port, recirculation port, discharge port) defined by a molded tank body communicating with the electrolyzer chamber. In one example, the internally threaded port is partially defined within a molded main wall of the tank body and partially defined within a molded external port protrusion projecting from the molded main wall of the tank body, and the port reinforcing insert is configured to be mounted on and around the port protrusion as a reinforcing ring (e.g., a cap). The port reinforcing insert may extend around the exterior of the port protrusion to provide increased circumferential strength to the molded port protrusion. In some examples, during molding of the insert, the molded plastic of the port protrusion flows into internal features (e.g., openings, notches, slots, etc.) of the port reinforcing insert to integrate and retain the reinforcing insert relative to the tank body. In some examples, the cap assembly may include a molded plastic cap secured to the open end of the can body by a molded plastic retaining ring fastened to the can body to capture the cap within a recess defined at the open end of the can body. The recess may be defined by an annular shoulder supporting a sealing ring, which is captured and compressed between the cap and the annular shoulder. A reinforcing insert, such as a reinforcing ring, may be molded within the plastic retaining ring. The reinforcing ring may have a metallic construction and may be positioned to align with an outer circumferential portion of the cap when the cap assembly is mounted on the can body. The outer circumferential portion of the cap includes a portion of the cap that presses the sealing ring against the annular shoulder of the can body. In one example, the reinforcing ring may overlap with the outer circumferential edge of the plastic cap. In one example, the reinforcing ring may have an inner diameter smaller than the outer diameter of the cap and an outer diameter larger than the outer diameter of the cap.In one example, the inner diameter of the reinforcing ring can be between the inner diameter of the sealing ring and / or the annular shoulder and the outer diameter of the sealing ring and / or the annular shoulder. In another example, the outer diameter of the reinforcing ring can be larger than the outer diameter of the sealing ring and / or the annular shoulder. In some examples, the plastic retaining ring includes a plastic lug that aligns with a plastic lug defined by a molded plastic can body. The lug of the plastic retaining ring can be secured to the lug of the can body by a threaded fastener threadedly connected within an internally threaded reinforcing insert molded within the lug of the plastic can body. The internally threaded reinforcing insert can have a metallic construction (e.g., stainless steel, titanium, etc.) and can include at least one (and preferably two) outer annular ribs spaced apart by an annular gap into which plastic material from the lug of the can body flows during molding to provide reinforced retention of the internally threaded reinforcing insert within the lug of the can body. The outer circumferential surface of the annular ribs can be knurled.

[0043] This disclosure relates to apparatus and systems for generating biocides to suppress biofouling within water systems. Exemplary biocides may include chlorine and its derivatives, copper, and other biocides. Example biocide generating apparatuses may include an electrolyzer comprising electrodes adapted to generate a biocide, such as chlorine and its derivatives, when an electric current flows through the electrodes. In some examples, the biocide generating apparatus or system introduces a biocide in situ (e.g., in real-time during operation of the water system) into water flowing through the water system. Preferably, the biocide is introduced at a sufficiently high concentration to prevent biomass growth within components of the water system. Example water system components through which the biocide-treated water flows may include heat exchangers for air conditioning and cooling systems.

[0044] Figure 1A watercraft 20 with an onboard water system 22 is shown, the onboard water system 22 including a biocidal agent generating device 21 according to the principles of this disclosure. The watercraft 20 is shown supported on a body of water 26. The onboard water system 22 includes an inlet 28, an outlet 30, and a water flow path 32 extending from the inlet 28 through the watercraft 20 to the outlet 30. The inlet 28 is configured to draw water from the body of water 26 into the water flow path 32. The inlet 28 is located below the water line 34 of the watercraft 20 and preferably at the bottom of the housing of the watercraft 20. The inlet 28 can be opened and closed by a valve 36, such as a seacock valve. The outlet 30 is configured to discharge water that has passed through the water flow path 32 back into the body of water 26. Preferably, the outlet 30 is positioned above the water line 34. The onboard water system 22 may include a plurality of components positioned along the water flow path 32. The water flow path 32 may include a plurality of conduits 38 (e.g., hoses, pipes, tubes, etc.) extending between components of the airborne water system 22 and used to deliver water between the various components along the water flow path 32. Figure 1 As shown, the depicted components include a biocidal agent generating device 21 (which may include an integrated filter), a pump 42, and one or more systems and / or devices 44 that use water delivered via a water flow path 32. The biocidal agent generating device 21 is adapted to generate a biocidal agent in the water flowing through the water flow path 32. The biocidal agent is configured to inhibit biodegradation within a conduit 38 and within one or more components located along the water flow path 32. A recirculation line 31 can recirculate treated water from a location downstream of the pump 42 back to the biocidal agent generating device 21. It will be understood that the biocidal agent may also be referred to as a disinfectant or a cleaning agent, as it may also include both disinfecting and cleaning properties.

[0045] It will be understood that examples of the types of systems and / or devices 44 that could benefit from biocide treatment may include cooling systems (such as air conditioners or coolers), where water drawn from water body 26 can be used as a cooling medium to cool the refrigerant in the cooling system. In other examples, water from water flow path 32 may be used to provide engine cooling. In other examples, water from water flow path 32 may be used for sanitation systems or watercraft propulsion systems.

[0046] Figure 2 An example configuration for a biocidal agent generating device 21 according to the principles of this disclosure is depicted. The biocidal agent generating device 21 includes a housing 102 defining a chamber 104 (see [link]). Figure 5In a preferred example, housing 102 has a molded plastic construction comprising a plastic material defining a plurality of ports 103 in fluid communication with chamber 104. In some examples, the plastic material may have a composition comprising materials such as polypropylene, polyamide, and polycarbonate. The plastic material may include a composition comprising individual compounds, combinations of compounds, and additives. In the illustrated example, housing 102 defines an inlet port 103a for guiding water from water flow path 32 into chamber 104, and an outlet port 103b for discharging water treated with biocides from chamber 104 to a downstream portion of water system 32. Housing 102 may also define a recirculation port 103c and a discharge port 103d in fluid communication with chamber 104. The recirculation port 103c may be connected to a recirculation line 31. Biocide generating device 21 also includes an electrode arrangement 112 positioned in chamber 104 (see [link to documentation]). Figure 7 The biocidal generator 21 generates a biocidal agent (e.g., chlorine and its derivatives) in the water flowing through chamber 104 for use in water treatment system 32. For example, when an electric current flows through the electrodes, the biocidal generator 21 can generate a biocidal agent in the water flowing through chamber 104. Electrode arrangement 112 may include a first electrode and a second electrode, the first electrode including a first set of electrode components (such as electrode plate 114a) and the second electrode including a second set of electrode components (such as electrode plate 114b), which are preferably staggered relative to each other when mounted in housing 102. During biocidal generation, one set of plates 114a, 114b serves as the anode, and the other set of plates 114a, 114b serves as the cathode. Preferably, the polarity of plates 114a, 114b is shifted alternately to reduce scaling. An example switching configuration for switching the polarity of plate groups 114a and 114b is disclosed in PCT International Publication No. WO2019 / 070877, which allows the system to alternate between a state where plate 114a is used as an anode and plate 114b is used as a cathode, and another state where plate 114a is used as a cathode and plate 114b is used as an anode. This PCT International Publication is incorporated herein by reference in its entirety. In some examples, the filter may also be integrated within the housing 102 of the biocidal agent generating device 21.

[0047] exist Figures 2 to 5 In the depicted example, the plastic material defining the port 103 of the housing 102 defines a helical thread 105 within the port 103. Additionally, a port reinforcing ring 116 is integrated with the housing 102 and surrounds the port axis 117 of each port 103 (see [link to example]). Figure 6The plastic material is used to reinforce the defining ports 103 of the housing 102. Individual port axes 117a to 117d are depicted for each of the ports 103a to 103d. The port reinforcing rings 116 each have a metallic construction. Figure 4 As shown, housing 102 includes sidewall 118 and port protrusions 120, which project from the outside of sidewall 118 at each of ports 103. Each port 103 extends through a corresponding port protrusion 120 in the sidewall 118 and port protrusion 120. Port reinforcing ring 116 is configured as a cap secured to the port protrusion 120. Figures 6 to 8 As shown, the cap includes a circumferential portion 122 and a flange portion 126. The circumferential portion 122 has an inner surface 124 radially facing the axes 117a to 117d of the ports 103a to 103d. The flange portion 126 protrudes radially inward from the circumferential portion 122 and is opposite to the axial end 128 of the port protrusion 120.

[0048] like Figure 2 As shown, the flange portion 126 is oriented perpendicularly to the axis 117 of the port 103. The inner surface 124 of the circumferential portion 122 of the cap faces the outer circumferential surface 130 of the port protrusion 120. Each inner surface 124 of the circumferential portion 122 defines an interlocking structure (such as at least one recess 132) into which the plastic material of the port protrusion 103 is molded to provide retention of the cap on the port protrusion 103. Alternatively, the cap may include an interlocking structure (such as a protrusion / gap) into which the plastic material of the port protrusion 103 is molded, such that the protrusion / gap is embedded in the plastic material to provide reinforced retention. The cap provides reinforced circumferential strength to the port protrusion 103, which helps prevent deformation and / or breakage when the fitting is threaded into the port 103. In some examples, the recess 132 defines a channel into which a portion of the liquid plastic material of the housing 102 can flow and solidify during the molding / forming of the port protrusion 120 of the housing 102, to improve the adhesion of the cap to the plastic material forming the port protrusion 120. In some examples, the recess 132 is a circumferential groove.

[0049] refer to Figure 5 , Figure 6 and Figure 6 The housing 102 includes a gusset plate 150, which is integrally (e.g., monolithically) molded with the outer peripheral surface 130 of the port protrusion 120 and also integrally (e.g., monolithically) molded with the sidewall 118 of the housing 102 to reinforce the port protrusion 120 relative to the sidewall 118 of the housing 102. In some examples, the cap has an axial length L1 (see...). Figure 6The axial length L1 extends from the outer end of the port protrusion 120 to the gusset plate 150. In some examples, the port protrusion 120 has an axial length L2 (see...). Figure 6 The axial length L2 is the nominal thickness T of the sidewall 118 (see...). Figure 4 At least twice that of ).

[0050] Reference Figure 5 and Figure 2 The housing 102 includes a tank body 160 having an open end 162 and a closed end 164. The tank body 160 includes a sidewall 118, and a port 103 is defined through the sidewall 118. The sidewall 118 extends between the open end 162 and the closed end 164. The housing 102 also includes a cover assembly 170 (see...). Figure 3 , Figure 7 and Figures 7 to 10 The cover assembly 170 is adapted to be removably secured to the open end 162 of the can body 160 to close the open end 162 of the can body 160. The cover assembly 170 may include a molded plastic cap 172 secured to the open end 162 of the can body 160 by a molded plastic retaining ring 174, which is fastened to the can body 160 to capture the molded plastic cap 172 within a recess defined at the open end 162 of the can body 160. The recess 176 is defined by an annular shoulder 177 supporting a sealing ring 178, which is captured and compressed between the molded plastic cap 172 and the annular shoulder 177. A reinforcing ring 179 (see...) Figure 7 The reinforcing ring 179 is molded within a molded plastic retaining ring 174. The reinforcing ring 179 has a metallic construction and is positioned to coincide (e.g., positioned above) the outer circumferential portion 180 of the molded plastic cap 172 when the cap assembly 170 is mounted on the tank body 160. The outer circumferential portion 180 of the molded plastic cap 172 includes a portion of the molded plastic cap 172 positioned to compress the sealing ring 178 against the annular shoulder 177 of the tank body 160. The reinforcing ring 179 may include a circumferential notch at its outer diameter. During molding the molded plastic retaining ring 174 onto the reinforcing ring 179, the notch may be filled with plastic material from the molded plastic retaining ring 174 to enhance retention of the reinforcing ring 179 within the molded plastic retaining ring 174. The molded plastic cap 172 may include a rib 199 (e.g., an annular protrusion) concentric with the center of the cap 172, and when the cap 172 is secured to the can body 160, the rib 199 is pressed into the sealing ring 178 to enhance the seal. The reinforcing ring 179 may be configured to reduce deformation of the molded plastic retaining ring 179 and ensure sufficient and preferably uniform compression of the sealing ring 178 around its entire circumference.

[0051] The reinforcing ring 179 is configured to overlap the outer circumferential edge 182 of the molded plastic cap 172 when the cap assembly 170 is mounted on the tank body 160. The inner diameter D1 of the reinforcing ring 179 is smaller than the outer diameter D2 of the molded plastic cap 172, and the outer diameter D3 of the reinforcing ring 179 is larger than the outer diameter D2 of the molded plastic cap 172. The inner diameter D1 of the reinforcing ring 179 is designed to lie between the inner diameter D4 of the sealing ring and / or the outer diameter D5 of the sealing ring and / or the annular shoulder. The outer diameter D3 of the reinforcing ring 179 is designed to be larger than the outer diameter D5 of the sealing ring and / or the annular shoulder. In some examples, when assembling the housing, the reinforcing ring 179 is positioned above at least a portion of the sealing ring 178. In some examples, when assembling the housing, the reinforcing ring 179 is positioned on at least 30%, 25%, 20%, or 15% of the outermost radius of the cap 172.

[0052] The molded plastic retaining ring 174 includes a flange with a plastic lug 200 that aligns with a plastic lug 202 defined by the can body 160. The plastic lug 200 of the retaining ring 174 is secured to the lug 202 of the can body 160 by a threaded fastener 204 threadedly connected to an internally threaded reinforcing insert 206 (see [link to fastener]). Figure 11 and Figures 12 to 26 Within the can body 160, the internally threaded reinforcing insert 206 is molded into the ear 202. The internally threaded reinforcing insert 206 has a metallic construction and includes at least two outer annular ribs 210 spaced apart by annular gaps 212. During molding, plastic material from the ear 202 of the can body 160 flows into the annular gaps 212 to provide reinforced retention of the internally threaded reinforcing insert 206 within the ear 202 of the can body 160. As shown, the outer circumferential surface 214 of the annular ribs 210 is knurled. The insert 206 may also be engaged into the flange of the can body 206 in areas other than the ear 202.

[0053] Electrode arrangement 112 is mounted (e.g., fastened to) cover 172 and carried together with cover 172. Access to electrode arrangement 112 is provided by removing cover 172 from tank body 160, thereby simultaneously removing electrode arrangement 112 carried together with cover 172 from tank body 160, and thus enabling cleaning and / or replacement of electrode arrangement 112 as needed. Thereafter, cover 172 can be re-secured to tank body 160 via retaining ring 174 and fastener 204, wherein elastomeric sealing ring 178 provides a fluid tight seal between retaining ring 174 and fastener 204. Because electrode arrangement 112 is carried together with cover 172, electrode arrangement 112 is re-installed in tank body 160 while cover 172 is installed on tank body 160.

[0054] Figure 12 Another biocidal agent generating device 321 according to the principles of this disclosure is depicted. In one example, the biocidal agent generating device 321 includes a main housing 302, which may include a reinforcing plastic structure including one or more of the reinforcing features described above. The main housing 302 defines a chamber 303 through which water flows and generates a biocidal agent. The main housing 302 includes a tank body 304, which may have a similar or identical construction to that of a tank body 160. The tank body 304 has an open end 306 and a closed end 308. The tank body 304 includes a sidewall 310 extending between the open end 306 and the closed end 308. The tank body 304 defines ports 312 through the sidewall 310 (e.g., a water inlet port 312a for directing water into the chamber 303, a water outlet port 312b for directing water to the outside of the chamber 303, a recirculation port 312c for recirculating treated water back into the chamber 303, and a discharge port 312d for discharging water from the chamber 303 during maintenance). The main housing 302 also includes a cover assembly 320 (see...). Figure 12The lid assembly 320 may include a can lid 322 adapted to be removably secured to an open end 306 of a can body 304 to close the open end 306 of the can body 304. The can lid 322 may have a molded plastic construction. The lid assembly 320 also includes a retaining ring 324 fastened to the can body 304 (e.g., via a fastener such as a threaded fastener 305) to secure the can lid 322 to the can body 304 above the open end 306 of the can body 304. In one example, the can lid 322 is disposed within a recess 326 defined at the open end 306 of the can body 304. The recess 326 is depicted as being defined by an annular shoulder 327 supporting a sealing ring 328 which is captured and compressed between the can lid 322 and the annular shoulder 327. In one example, retaining ring 324 can be reinforced in the same way as retaining ring 174.

[0055] The biocidal agent generating device 321 also includes an electrode arrangement 330 comprising a first electrode 330a and a second electrode 330b positioned within a chamber 303 for generating a biocidal agent within the chamber 303. The biocidal agent generating device 321 also includes a control assembly 331 (e.g., a control module) comprising a circuit housing 332 removably mounted on the exterior of a tank lid 322. The circuit housing 332 can be mounted on and removed from the tank lid 322 while its interior 334 remains sealed, maintaining an environmentally sealed environment. Figure 13 The circuit housing 332 is shown after being removed from the can lid 322.

[0056] The control assembly 331 includes a power line 336 (i.e., a power cable) extending into the circuit housing 332 to provide electrical power to the electrode arrangement 330. The circuit housing 332 may be sealed at the point where the power line 336 enters the circuit housing 332, and may be provided with a sheath 337 to provide stress relief for the power line 336 at this point. The power line 336 may include one or more conductive wires for transmitting power in the form of electricity from an external power source 341 (e.g., a battery, generator, or other power source, in some examples ranging from about 12 volts to about 240 volts of alternating current (AC) or direct current (DC)) to the circuit arrangement 338 of the control assembly 331 housed within the circuit housing 332. The power cord 336 may also include one or more communication lines for connecting the circuit arrangement 338 to other components, such as sensors (e.g., a water flow sensor 339 for sensing the flow of water through the biocidal generator 321 (e.g., at the outlet of the biocidal generator)), a main controller, one or more water pumps, a remote display, a remote controller, and other components.

[0057] refer to Figure 23The circuit arrangement 338 may include an electronic controller 344, a polarity switching arrangement 346, a first power conversion circuit 348, and a second power conversion circuit 350, etc. The first power conversion circuit 348 provides power conversion to reduce the voltage of the supplied power from an external power source 341 delivered to the circuit arrangement 338 via power line 336 to a voltage level suitable for allowing a relatively high level of current to be applied across the electrode arrangement 330 to facilitate the generation of biocides in the water flowing through the biocide generating device. In a preferred example, the first power conversion circuit 348 provides direct current (DC) to direct current (DC) voltage conversion, but it may also provide alternating current (AC) to (DC) conversion if the power supplied from the external power source is AC power. The second power conversion circuit 350 can provide power conversion to convert the power from the external power source 341 to a voltage suitable for use with the electronic processor of the controller 344. The polarity switching arrangement 346 is configured to periodically switch the polarity of the first electrode 330a and the second electrode 330b during biocide generation to reduce scaling. The circuit arrangement 338 may include isolation circuitry (e.g., ground isolation of the circuitry from an external power source) for electrically isolating the electrolysis circuitry. To coordinate and implement the application of current (e.g., DC current) across electrodes 330a, 330b during biocide generation, the electronic controller 344 may have one or more processors that may interface with software, firmware, and / or hardware. In some embodiments, the controller 344 may include digital or analog processing capabilities and may interface with optional memory (e.g., random access memory, read-only memory, or other data storage devices). In some embodiments, the controller 344 may include a programmable logic controller, one or more processors, or similar structures. The controller 344 may also interface with a user interface 352 (e.g., control buttons, switches, etc.), which in some embodiments may include one or more displays 354 (e.g., indicator lights, LEDs, display screens, etc.). In some examples, circuit arrangement 338 can be used as a constant current power supply to generate a constant DC current across electrodes 330a, 330b during biocide generation. In some examples, electronic controller 344 is coupled to flow sensor 339 to sense the water flow through biocide generation device 321 and to change the magnitude of the constant current based on the sensed water flow. In a preferred example, circuit arrangement 338 is supported by circuit board 355 housed within circuit housing 332. An example circuit arrangement providing a constant current source, voltage conversion, electrical isolation, and polarity shifting is disclosed in PCT International Publication No. WO2019 / 070877, the entire contents of which are incorporated herein by reference. Connector 357 (see Figure 14 (This can be used as a wire to connect circuit board 355 to power line 336.)

[0058] In one example, the display 354 and / or the user interface 352 may be integrated with the circuit housing 332 (e.g., as shown in the image). Figure 19 The circuit housing 332 shown is integrated on its top wall. In some examples, the display 354 on the circuit housing 332 can be coupled to a controller to display the real-time rate of water flow through the biocidal agent generating device 321, sensed by the water flow sensor 339. In some examples, the display 354 on the circuit housing 332 can provide real-time indications of operating status (system running, system shut down, error indication, alarm indication, low flow indication, filter clog indication, error code, etc.).

[0059] In some examples, the electrode arrangement 330 is mounted to the can lid 322, and the electrode arrangement 330 is carried along with the can lid 322 when the can lid 322 is mounted on or removed from the can body 304. In some examples, when the circuit housing 332 is removed from the can lid 322 (e.g., disassembled), the circuit arrangement 338 is simultaneously electrically disconnected from the electrode arrangement 330; and when the circuit housing 332 is coupled (e.g., mechanically fastened) to the can lid 322, the circuit arrangement 338 is simultaneously electrically connected to the electrode arrangement 330. In some examples, the terminals of electrode arrangement 330 are configured to engage with fasteners such as threaded fasteners (e.g., nuts) to provide two or more of the following results / functions: a) removably and mechanically securing circuit housing 332 to tank cover 322; b) disconnectably and electrically connecting electrode arrangement 330 to circuit arrangement 338; and c) completing the heat transfer path between components of circuit arrangement 338 and electrode arrangement 330.

[0060] refer to Figure 20 and Figure 20The first electrode 330a includes a plurality of first electrode plates 356a electrically connected to a first terminal 358a via a connecting plate 360a; and the second electrode 330b includes a plurality of second electrode plates 356b electrically connected to a second terminal 358b via a second connecting plate 360b. Components of electrodes 330a and 330b may each be configured to resist corrosion and conduct both electricity and heat. In one example, components of electrodes 330a and 330b are made of a material having a composition including metals (e.g., metallic elements such as titanium, or metallic alloys such as stainless steel). The first terminal 358a and the second terminal 358b extend through a canister cover 322 (e.g., through a cover opening 362 in the canister cover 322). A seal 364 (e.g., a sealing member, which may include an elastomeric gasket such as an O-ring) concentrically surrounds the opening 362 and the terminals 358a, 358b, and provides a seal between the inside of the tank cover 322 and the upper sides of the connecting plates 360a, 360b to prevent leakage of water from the chamber 303 through the opening 362. Electrode fasteners 366 are secured to the first terminal 358a and the second terminal 358b to mount the electrode arrangement 330 to the tank cover 322. As shown, a threaded engagement is provided between the electrode fasteners 366 and the first terminal 358a and the second terminal 358b. For example, the first terminal 358a and the second terminal 358b are depicted as having external threads 368 that engage with the internal threads 370 of the electrode fasteners 366. By threading electrode fasteners 366 onto the first and second terminals 358a and 358b, the canister cap 322 can be clamped between the electrode fasteners 366 and the connecting plates 360a and 360b, thereby securing the electrode arrangement 330 to the canister cap 322 and compressing the seal 364 located between the inner side of the canister cap 322 and the top side of the connecting plates 360a and 360b. As shown, two electrode fasteners and a washer 372 in the electrode fasteners 366 are secured to each of the first and second terminals 358a and 358b. As shown, the fastener 366 is shaped as a disc nut with features (e.g., a notch) present in the top side of the fastener 366, which are adapted to engage torque transmission tools (such as a key wrench). By mating the fasteners 366 onto each of the terminals 358a and 358b, the mated fasteners 366 work against each other to resist loosening. Fastener 366 provides a securing function for fixing electrode arrangement 330 to tank cover 322, and also provides a spacing / support function for engaging and supporting the bottom side of circuit housing 332 when the circuit housing 332 is mounted to the outside of tank cover 322.

[0061] When the circuit housing 332 is mounted on the can lid 322, the first terminal 358a and the second terminal 358b extend through the circuit housing 332, and the circuit housing fastener 380 is secured to the first terminal 358a and the second terminal 358b to secure the circuit housing 332 to the can lid 322. A threaded engagement can be provided between the first terminal 358a and the second terminal 358b and the circuit housing fastener 380. For example, as shown, the circuit housing fastener 380 is depicted as a nut having an internal thread 381 and an external wrench face. The internal thread 381 is adapted to engage the external thread 368 of the first terminal 358a and the second terminal 358b. By tightening the circuit housing fasteners 380 on the first terminal 358a and the second terminal 358b to a sufficient tightness (e.g., to a sufficient torque level), the circuit housing 332 can be secured to the first terminal 358a and the second terminal 358b by being clamped between the circuit housing fasteners 380 and the canister cap 322.

[0062] refer to Figure 21 and Figure 21 The circuit housing 332 has an upper dome 400 with an open bottom 402. The circuit housing 332 also includes a lower base 404 mounted to the upper dome 400 to cover the bottom 402 of the opening. In one example, the upper dome 400 is detachable from the lower base 404. In one example, when the upper dome 400 and the lower base 404 are secured together, the upper dome 400 and the lower base 404 are sealed relative to each other from the environment. In one example, the environmental seal is a watertight seal. For example, as... Figure 20 As shown, the lower base 404 is mounted inside the lower portion of the upper dome 400, and a seal 406 (e.g., an elastomeric seal member, which may include a gasket member such as an O-ring) provides a seal (e.g., a radial seal) between the upper dome 400 and the lower base 404. The upper dome 400 and the lower base 404 may each have a polymer construction (e.g., a molded plastic construction).

[0063] The upper dome 400 includes a main dome body 412 and a first sleeve 414a and a second sleeve 414b projecting downward from the main dome body 412. The first sleeve 414a and the second sleeve 414b include an open upper end portion 416 and a lower end portion 418. The lower end portion 418 of the first sleeve 414a and the second sleeve 414b defines a sleeve shoulder 420. Figure 21As shown, the first terminal 358a and the second terminal 358b extend through the lower base 404 and enter (e.g., at least partially through) the first sleeve 414a and the second sleeve 414b, respectively. The circuit housing fastener 380 engages within the first sleeve 414a and the second sleeve 414b and is accessible from the open upper ends 416 of the first sleeve 414a and the second sleeve 414b via the first sleeve 414a and the second sleeve 414b. The lower ends 418 of the first sleeve 414a and the second sleeve 414b engage in the first recess 422a and the second recess 422b defined by the lower base 404, respectively (see...). Figure 24 and Figure 24 )Inside.

[0064] The circuit layout 338 of the biocidal agent generating device 321 includes a first terminal plate 424a and a second terminal plate 424b (see...). Figure 20 The first end plate 424a and the second end plate 424b are at least partially embedded in the polymer material of the lower base 404. The first end plate 424a and the second end plate 424b are preferably adapted to resist corrosion and conduct both electricity and heat. In some examples, the first end plate 424a and the second end plate 424b are made of a material containing a metallic element (e.g., a metallic element such as titanium or a metallic alloy such as stainless steel). The first end plate 424a and the second end plate 424b define a threaded base retaining opening 430 located at the bottom region of the first recess 422a and the second recess 422b. The biocidal agent generating device 321 includes base retaining fasteners 432a and 432b, which are disposed on sleeve shoulders 420 within the first sleeve 414a and the second sleeve 414b, and are threadedly connected within a base retaining opening 430 to secure the lower base 404 to the upper dome 400. Figure 22As shown, the first terminal 358a and the second terminal 358b extend through the base retaining fasteners 432a and 432b, respectively, and the circuit housing fastener 380 is mounted on the base retaining fasteners 432a and 432b. The first terminal 358a and the second terminal 358b are electrically connected to the first terminal plate 424a and the second terminal plate 424b, respectively, through the circuit housing fastener 380 and the base retaining fasteners 432a and 432b. Electrical conductors within the circuit housing 332 can electrically connect the first power conversion circuit 348 on the circuit board 355 to the first terminal plate 424a and the second terminal plate 424b. The biocidal agent generating device also includes an elastomeric seal 435, which is coaxial with respect to a corresponding terminal of terminals 358a, 358b, and is installed in the first recess 422a and the second recess 422b, and seals between the lower end 418 of the first sleeve 414a and the second sleeve 414b and the lower base 404 (e.g., against the end plates 424a, 424b of the lower base 414).

[0065] The circuit board 355, housed within the circuit housing 332, defines an opening 440 (see...). Figure 25 The first sleeve 414a and the second sleeve 414b extend through the opening 440. The biocidal agent generating device 321 also includes a heat sink 450 located within a circuit housing 332 below the circuit board 354 for transferring heat from one or more heat-generating components on the circuit board 354 (e.g., the first power conversion circuit 348 and the second power conversion circuit 350) to at least one of the first termination plates 424a and the second termination plate 424b. The first termination plate 424a and the second termination plate 424b are configured to transfer heat to the first terminal 358a and the second terminal 358b, respectively. The heat sink 450 may be constructed of a material containing a metal suitable for heat transfer (e.g., a metallic element, a metallic alloy, or a metallic compound). The heat sink 450 includes an open end 452 and a closed end 454. In one example, the heat sink 450 is C-shaped or horseshoe-shaped (see [reference needed]). Figure 26When the power cable 336 enters the circuit housing 332, the power cable 336 passes through the open end 452 of the heat sink 450. In this way, the presence of the heat sink 450 does not interfere with the wiring of the power cable 336 into the circuit housing 332. The heat sink 450 includes an enlarged heat sink block 456 at a closed end 454, which defines one or more upper heat sink surfaces 458 opposite to one or more heat-generating components (e.g., the first power conversion circuit 348 and the second power conversion circuit 350), and one or more lower heat sink surfaces 459 opposite to the first termination plate 424a and the second termination plate 424b. The enlarged heat sink block 456 is configured to conduct heat from the heat-generating component to a first termination plate 424a and a second termination plate 424b, which in turn conduct heat to the electrode arrangement 330 via first and second terminals 358a and 358b (e.g., heat is conducted via first and second terminals 358a and 358b to electrode plates 356a, 356b, where heat is conducted to the water flowing through the biocidal agent generating device 321). In some examples, a thermal pad may be disposed between the plates 424a, 424b and the lower surface 459 of the heat sink.

[0066] The upper dome 400 includes a sidewall 460 defining a circular shape. The heat sink 450 has an outer circular shape that extends along and faces the inner surface of the sidewall 460 of the upper dome 400. The heat sink 450 includes a first leg 462 and a second leg 464 extending from an enlarged heat sink block 456 located at the closed end 454 of the heat sink 450 to the open end 452 of the heat sink 450. Each of the first leg 462 and the second leg 464 has an L-shaped cross-section formed by a leg bottom wall 466 and a leg side wall 468, the leg bottom wall 466 facing the lower base 404 of the circuit housing, and the leg side wall 468 facing the inner surface of the sidewall 460 of the upper dome 400 of the circuit housing 332. The first leg 462 and the second leg 464 are configured to transfer heat outward from inside the circuit housing 332 through the side wall 460 (e.g., via the leg side wall 468) and through the lower base 404 (e.g., via the leg bottom wall 466).

[0067] Figures 27 to 30Thermal flow arrows are provided to depict the flow of heat within the circuit housing 322. As shown, the enlarged heat sink block 456 transfers heat from the heat-generating components on the bottom of the circuit board 355 to the first termination plate 424a and the second termination plate 424b. Heat from the first termination plate 424a and the second termination plate 424b is transferred through the electrode arrangement 330 to the water flowing through the biocidal agent generating device. Circuit housing fasteners 380 and base retaining fasteners 432a, 432b facilitate the transfer of heat from the termination plates 424a, 424b to the electrode arrangement 330. The first leg 462 and the second leg 464 of the heat sink 450 facilitate the transfer of heat through the peripheral walls (e.g., side walls and bottom walls) of the circuit housing 322.

[0068] Figures 27 to 30 Another control assembly 531, adapted to control the operation of an electrode arrangement 330 (which includes terminals 358a, 358b connected to electrode plates 356a, 356b via plate connecting members 357a, 357b, respectively), is depicted according to the principles of this disclosure. Except for being modified for use with a heat-conducting tank cover 522 to enhance heat transfer from the control assembly 531 through the tank cover 522 to the tank body 160 and / or to the water flowing through the electrolyzer (i.e., through the tank body 160), the control assembly 531 has the same configuration as the control assembly 331 (e.g., including a circuit arrangement 338, an upper dome 400, circuit housing fasteners 380, and base retaining fasteners 432a, 432b). For example, control assembly 531 includes an improved radiator 550 and an improved lower base 504, which have been designed to enhance heat transfer from within the circuit housing 532 through the tank lid 522 to the tank body 160 and / or to enhance heat transfer to the water flowing through the tank body 160 of the electrolytic cell. The radiator 550 is made of a thermally conductive material (e.g., metal) and is positioned below the circuit board 355, and is configured to transfer heat from one or more heat-generating components on the circuit board 355 through the lower base 504 of the circuit housing 532 to the tank lid 522 when the circuit housing 532 is mounted on the tank lid 522. The tank lid 522 is configured to transfer heat to other parts of the tank and / or the water flowing through the tank, and preferably has a construction suitable for heat transfer, such as a metallic construction (e.g., stainless steel, titanium, etc.) or a plastic construction (containing plastic impregnated with heat-transfer additives).

[0069] In some examples, at least a portion of the lower base 504 has a thickness of less than 1.5 mm between the heat sink 550 and the canister cap 522 to increase heat transfer. In some examples, the lower base 504 comprises a lower base material that is an elastomer, which is compressed during mounting of the circuit housing 532 onto the canister cap 522 to reduce air gaps caused by surface defects on the opposing surfaces of the lower base 504 and the canister cap 522, thereby increasing heat transfer. In some examples, the elastomer defines at least 30%, 40%, or 50% of the bottom surface region of the lower base 504. In some examples, the heat sink 550 has a bottom surface region that contacts the elastomer lower base material, wherein the bottom surface region of the heat sink 550 in contact with the elastomer lower base material is at least 20%, 25%, 30%, 40%, or 50% of the region defined by the periphery of the bottom of the lower base 504. In one example, the elastomer lower base material comprises or is based on silicone resin.

[0070] In some examples, electrode arrangement 330 is mounted to tank cover 522, and the biocidal agent generating device includes a dielectric insulating plate 600 positioned between the bottom side 601 of tank cover 522 and a plurality of first electrode plates 356a and second electrode plates 356b. The dielectric insulating plate 600 includes an insulating sleeve 602 that projects upward from the body 603 of the dielectric insulating plate 602 into an opening in tank cover 522 through which first terminals 358a and second terminals 358b extend. The first terminals 358a and second terminals 358b extend through the insulating sleeve 602, and the insulating sleeve 602 electrically isolates the first terminals 358a and second terminals 358b from tank cover 522. Tank cover 522 may have a metallic construction. A first elastomeric seal 605 may be disposed around each of the first terminal 358a and the second terminal 358b for sealing between the bottom side 606 of the body 603 of the dielectric insulator plate 600 and the plate connecting members 357a, 357b, thereby providing electrical connection between the first terminal 358a and the second terminal 358b and the plurality of first electrode plates 356a and second electrode plates 356b. A second elastomeric seal 609 may be disposed around each of the first terminal 358a and the second terminal 358b for sealing between the top side 610 of the body 603 of the dielectric insulator plate 600 and the bottom side 601 of the tank cover 522.

[0071] In some examples, the lower base 504 has a composite structure comprising an inner portion 620 and an outer portion 622 surrounding the inner portion 620, the inner portion 620 being made of a first polymer material and the outer portion 622 being made of a second polymer material. Preferably, the second polymer material is softer than the first polymer material (i.e., the outer portion 622 has a softer construction than the inner portion 620). In some examples, the inner portion 620 and the outer portion 622 are co-molded relative to each other. In some examples, the first polymer material is a thermoplastic material and the second polymer material comprises a siloxane. In some examples, the first polymer material is a plastic and the second polymer material is an elastomer.

[0072] like Figures 27 to 30 As shown, the outer portion 622 defines a central opening 624 in which the inner portion 620 is positioned. As depicted for illustrative purposes, the inner portion 620 and the outer portion 622 are shown as separate, but in preferred practice, they are molded together as a single component. The outer portion 622 extends radially outward from the inner portion 620. A heat sink 550 defines a heat sink opening 552 in which the inner portion 620 is positioned. The heat sink 550 includes a bottom surface 553 opposite to the bottom wall portion 625 of the outer portion 622. The outer portion 622 also includes an integral sealing portion 627 circumferentially surrounding the outer portion 622, wrapping around the periphery of the heat sink 550, and sealing the lower base 504 relative to the upper dome 400 of the circuit housing 532. The bottom wall portion 625 of the outer portion 622 and the sealing portion 627 are formed as a single integral part. As shown, when the circuit housing 532 is assembled, the sealing portion 627 forms a radial seal relative to the interior of the upper dome 400.

[0073] In some examples, the bottom wall portion 625 has a thickness T of less than 1.5 mm between the bottom surface of the radiator 550 and the top surface of the tank cover 522 to increase heat transfer. In some examples, at least 20%, or at least 30%, or at least 40% of the bottom surface of the radiator is opposite to and in contact with the thin bottom wall. ​ In the example, the bottom wall portion 625 is an elastomer that is compressed during the installation of the tank cover 522 to reduce the air gap caused by surface defects on the opposing surfaces of the bottom wall portion 625 and the tank cover 522, thereby increasing heat transfer.

[0074] Similar to the previously described example, electrode arrangement 330 is mounted to canister cover 522. For example, first terminal 358a and second terminal 358b extend through canister cover 522, and electrode fasteners 366 are secured to the first terminal 358a and second terminal 358b to mount electrode arrangement 330 to canister cover 522. Dielectric spacers 367 (e.g., dielectric washers) are mounted on terminals 358a, 358b between electrode fasteners 366 and canister cover 522 to electrically isolate electrode fasteners 366 from canister cover 522. When circuit housing 532 is mounted on canister cover 522, first terminal 358a and second terminal 358b extend through interior portion 620 of lower base 504. Circuit housing fasteners 380 are secured to the first terminal 358a and second terminal 358b to secure circuit housing 532 to canister cover 522.

[0075] In the illustrated example, the first terminating plate 630a and the second terminating plate 630b are at least partially embedded in the interior portion 620 of the lower base 504. The first terminating plate 630a and the second terminating plate 630b define threaded base retaining openings 634a, 634b, and base retaining fasteners 432a, 432b are threaded into these threaded base retaining openings 634a, 634b to secure the lower base 504 to the upper dome 400 of the circuit housing 532. The first terminal 358a and the second terminal 358b extend through the base retaining fasteners 432a, 432b. A circuit housing fastener 380 is disposed on the base retaining fasteners 432a, 432b. The first terminal 358a and the second terminal 358b are electrically connected to the first terminating plate 630a and the second terminating plate 630b respectively via the circuit housing fastener 380 and the base retaining fasteners 432a, 432b. The electrical conductors within the circuit housing 532 can electrically connect the power conversion circuit to the first terminal block 630a and the second terminal block 630b.

[0076] In some examples, the can lid according to this disclosure may have a plastic or metal construction (e.g., stainless steel, titanium, etc.). The plastic construction may include a construction with or without heat transfer additives. The plastic construction may contain materials such as thermoplastic materials.

[0077] As shown in the figures, in some embodiments, the electrode assembly of the biocidal agent generating device disclosed herein may be in the form of electrode plates (e.g., anode and cathode plates interleaved with each other), which may be electrically connected to a circuit configured to apply current to the electrodes to drive an electrolytic reaction, thereby producing a biocidal agent (e.g., chlorine, copper, etc., and their derivatives). In some examples, at least one electrode arrangement in the electrode arrangement comprises one or more of copper, aluminum, zinc, silver, or another electrical conductor (such as carbon or a conductive polymer) mixed with an inhibitory material having bioinhibitory properties. In some embodiments, the electrode assembly may be coated with a catalyst material (e.g., oxides of iridium, ruthenium, titanium, tantalum, niobium, etc.) for catalyzing the production of chlorine or its derivatives.

[0078] For brine applications, the preferred biocide produced by the biocide generating apparatus of the type disclosed herein comprises chlorine and / or its derivatives. Other biocides can be produced depending on the type of salt or ions present in the water. The process for producing the biocide may include an in-situ process, wherein ionized water (e.g., seawater, ocean water, brackish water, salt pond water, etc.) undergoes electrolysis as water flows through the biocide generating apparatus. A first electrode and a second electrode may define an anode (e.g., positive) and a cathode (e.g., negative), respectively, wherein current flows directly through the water between the anode and cathode, thereby driving the electrolysis. The polarity of the electrodes may be periodically shifted to reduce scaling on the electrodes.

[0079] Preferred aspects and embodiments of this disclosure have been described, and modifications and equivalents of the disclosed concepts will readily occur to those skilled in the art. However, these modifications and equivalents are intended to be included within the scope of the appended claims.

Claims

1. A biocide generating device, comprising: a main housing defining a chamber, the main housing comprising a canister body having an open end and a closed end, the canister body having an inlet port and an outlet port in fluid communication with the chamber, wherein the main housing further comprises a canister lid adapted to be removably secured to the open end of the canister body to close the open end of the canister body; an electrode arrangement comprising a first electrode and a second electrode positioned within the chamber for generating a biocide within the chamber; and a control assembly comprising: - a circuit housing removably mounted at a top of the canister lid, the circuit housing being mountable on and removable from the canister lid while an interior of the circuit housing remains enclosed; - a power cord extending into the circuit housing for providing electrical power to the electrode arrangement; and - a circuit arrangement housed within the circuit housing, the circuit arrangement comprising a power conversion circuit for providing power conversion of electrical power provided from the power cord to the electronic arrangement, the circuit arrangement further comprising a switching circuit for switching polarity of the first electrode and the second electrode.

2. The bio-kill agent generating device of claim 1, wherein, the circuit arrangement comprising an electronic controller, wherein the power conversion circuit is a first power conversion circuit for reducing voltage of electrical power provided from the power cord to the electrode arrangement, and wherein the circuit arrangement comprises a second power conversion circuit for providing power conversion of electrical power provided from the power cord to the electronic controller.

3. The biopesticide generating device of claim 2, wherein, the circuit arrangement comprising a constant current source for driving current between the first electrode and the second electrode, wherein the electronic controller interfaces with a flow sensor for sensing flow of water through the biocide generating device and varies a magnitude of the constant current based on the sensed flow, and wherein the circuit arrangement is supported by a circuit board housed within the circuit housing.

4. The bio-kill agent generating device of claim 1, wherein, the electrode arrangement being mounted to the canister lid, wherein the first electrode comprises a plurality of first electrode plates electrically coupled to a first terminal post, wherein the second electrode comprises a plurality of second electrode plates electrically coupled to a second terminal post, wherein the first terminal post and the second terminal post extend through the canister lid and an electrode fastener is secured to the first terminal post and the second terminal post to mount the electrode arrangement to the canister lid, wherein the first terminal post and the second terminal post extend through the circuit housing when the circuit housing is mounted on the canister lid, and wherein a circuit housing fastener is secured to the first terminal post and the second terminal post to secure the circuit housing to the canister lid.

5. The bio-kill agent generating device of claim 4, wherein, The first and second terminal posts have external threads, and the electrode and circuit housing fastener has internal threads that engage the external threads of the first and second terminal posts.

6. The biopesticide generating device of claim 5, wherein, The circuit housing has an upper dome with an open bottom and a lower base that mounts to the upper dome to cover the open bottom, wherein the upper dome includes a main dome body and first and second sleeves that project downwardly from the main dome body, the first and second sleeves including open upper and lower ends, the lower ends of the first and second sleeves defining sleeve shoulders, wherein the first and second terminal posts extend through the lower base and respectively through the first and second sleeves, wherein the circuit housing fastener fits within the first and second sleeves and is accessible from the open upper ends of the first and second sleeves through the first and second sleeves, and wherein the lower ends of the first and second sleeves respectively fit within first and second recesses defined by the lower base.

7. The biopesticide generating device of claim 6, wherein, The first and second terminal posts are at least partially embedded in the lower base, wherein the first and second terminal posts define threaded base retention openings, wherein the biocide generating device includes a base retention fastener that seats on the sleeve shoulders within the first and second sleeves and threadably connects within the base retention openings to secure the lower base to the upper dome, wherein the first and second terminal posts extend through the base retention fastener, wherein the circuit housing fastener seats on the base retention fastener, wherein the first and second terminal posts are respectively electrically connected to the first and second terminal plates by the circuit housing fastener and the base retention fastener, and wherein electrical guides within the circuit housing electrically connect the power conversion circuit to the first and second terminal plates.

8. The biocide generating device of claim 7, further comprising a first seal between the upper dome and the lower base, and a second seal that fits within the first and second recesses and seals between the lower ends of the first and second sleeves and the lower base.

9. The biocide generating device of claim 7, further comprising a circuit board within the circuit housing for supporting the circuit arrangement, the circuit board defining an opening through which the first sleeve and the second sleeve extend, the biocide generating device further comprising a heat sink positioned within the circuit housing below the circuit board for transferring heat from one or more heat-generating components on the circuit board to at least one of the first terminal plate and the second terminal plate, and wherein, The first and second terminal plates are configured to respectively transfer heat to the first and second terminal posts.

10. The biopesticide generating device of claim 9, wherein, The one or more heat generating components include the power conversion circuit.

11. The biopesticide generating device of claim 9, wherein, The heat sink includes an open end and a closed end, wherein the power cable enters the circuit housing through the open end. The first and second terminal posts have external threads, and the electrode and circuit housing fastener has internal threads that engage the external threads of the first and second terminal posts. The circuit housing has an upper dome with an open bottom and a lower base that mounts to the upper dome to cover the open bottom, wherein the upper dome includes a main dome body and first and second sleeves that project downwardly from the main dome body, the first and second sleeves including open upper and lower ends, the lower ends of the first and second sleeves defining sleeve shoulders, wherein the first and second terminal posts extend through the lower base and respectively through the first and second sleeves, wherein the circuit housing fastener fits within the first and second sleeves and is accessible from the open upper ends of the first and second sleeves through the first and second sleeves, and wherein the lower ends of the first and second sleeves respectively fit within first and second recesses defined by the lower base. The first and second terminal plates are at least partially embedded in the lower base, wherein the first and second terminal plates define threaded base retention openings, wherein the biocide generating device includes a base retention fastener that seats on the sleeve shoulders within the first and second sleeves and threadably connects within the base retention openings to secure the lower base to the upper dome, wherein the first and second terminal posts extend through the base retention fastener, wherein the circuit housing fastener seats on the base retention fastener, wherein the first and second terminal posts are respectively electrically connected to the first and second terminal plates by the circuit housing fastener and the base retention fastener, and wherein electrical guides within the circuit housing electrically connect the power conversion circuit to the first and second terminal plates.

8. The biocide generating device of claim 7, further comprising a first seal between the upper dome and the lower base, and a second seal that fits within the first and second recesses and seals between the lower ends of the first and second sleeves and the lower base. The first and second terminal plates are configured to respectively transfer heat to the first and second terminal posts. The one or more heat generating components include the power conversion circuit. The heat sink includes an open end and a closed end, wherein the power cable enters the circuit housing through the open end.

12. The biopesticide generating device of claim 11, wherein, The heat sink includes an enlarged heat sink block at the closed end, the enlarged heat sink block defining one or more heat sink upper surfaces opposite the one or more heat-generating components, and one or more heat sink lower surfaces opposite the first end plate and the second end plate.

13. The biopesticide generating device of claim 12, wherein, The upper dome includes a sidewall defining a circular shape, and wherein the heat sink has an outer circular shape extending along and opposite an inner surface of the sidewall of the upper dome.

14. The biopesticide generating device of claim 13, wherein, The heat sink includes first and second legs extending from the enlarged heat sink block at the closed end of the heat sink to the open end of the heat sink, wherein each of the first and second legs has an L-shaped cross-section formed by a leg bottom wall opposite the lower base of the circuit housing and a leg sidewall opposite the inner surface of the sidewall of the upper dome of the circuit housing.

15. The biocide generating device of claim 1, further comprising a circuit board within the circuit housing for supporting the circuit arrangement, the biocide generating device further comprising a heat sink positioned within the circuit housing below the circuit board for transferring heat from one or more heat generating components on the circuit board to the side or bottom wall of the circuit housing and / or the electrode arrangement, wherein the heat sink comprises an open end and a closed end, wherein, The power cable enters the circuit housing through the open end.

16. The biopesticide generating device of claim 15, wherein, The one or more heat-generating components include the power conversion circuit.

17. The biopesticide generating device of claim 15, wherein, The heat sink includes an enlarged heat sink block at the closed end, the enlarged heat sink block defining one or more heat sink upper surfaces opposite the one or more heat-generating components.

18. The biopesticide generating device of claim 17, wherein, The circuit housing includes a sidewall defining a circular shape, and wherein the heat sink has an outer circular shape extending along and opposite an inner surface of the sidewall of the upper dome.

19. The biopesticide generating device of claim 18, wherein, The heat sink includes first and second legs extending from the enlarged heat sink block at the closed end of the heat sink to the open end of the heat sink, wherein each of the first and second legs has an L-shaped cross-section formed by a leg bottom wall opposite the lower base of the circuit housing and a leg sidewall opposite the inner surface of the sidewall of the circuit housing.

20. The biocide generating device of claim 1, further comprising a circuit board within the circuit housing for supporting the circuit arrangement, the control assembly further comprising a heat sink positioned within the circuit housing below the circuit board for transferring heat from one or more heat generating components on the circuit board through a lower base of the circuit housing into the canister lid when the circuit housing is mounted on the canister lid, and wherein, The tank lid is configured to transfer heat to other portions of the tank and / or water flowing through the tank, respectively.

21. The biopesticide generating device of claim 20, wherein, At least a portion of the lower base has a thickness of less than 1.5 mm between the heat sink and the tank lid to increase heat transfer.

22. The biopesticide generating device of claim 20, wherein, The lower base includes a lower base material that is an elastomer that is compressed during installation of the circuit housing on the tank lid to reduce air gaps resulting from surface imperfections of opposing surfaces of the lower base and the tank lid to increase heat transfer.

23. The biopesticide generating device of claim 22, wherein, The lower base material includes or is based on silicone.

24. The biopesticide generating device of claim 20, wherein, The tank lid has a construction that includes a plastic impregnated with a heat transfer additive. The tank lid has a construction that includes a plastic impregnated with a heat transfer additive.

25. The biopesticide generating device of claim 20, wherein, The canister lid has a metal construction, wherein the electrode arrangement includes a conductor electrode post that extends through an opening in the canister lid, and wherein an electrical insulator sleeve is disposed around the conductor electrode post within the opening in the canister lid to electrically isolate the conductor electrode post from the canister lid.

26. The biopesticide generating device of claim 25, wherein, The metal construction of the canister lid includes titanium or stainless steel.

27. The biocide generating device of any one of claims 20 to 23, wherein, The electrode arrangement is mounted to the canister lid, wherein the first electrode includes a plurality of first electrode plates electrically coupled to a first terminal post, wherein the second electrode includes a plurality of second electrode plates electrically coupled to a second terminal post, wherein the first terminal post and the second terminal post extend through the canister lid, and an electrode fastener is secured to the first terminal post and the second terminal post to mount the electrode arrangement to the canister lid, wherein the first terminal post and the second terminal post extend through the circuit housing when the circuit housing is mounted on the canister lid, and wherein a circuit housing fastener is secured to the first terminal post and the second terminal post to secure the circuit housing to the canister lid, wherein the canister lid has a metal construction, wherein the biocide generation device includes a dielectric insulator plate positioned between a bottom side of the canister lid and the plurality of first electrode plates and plurality of second electrode plates, wherein the dielectric insulator plate includes an insulator sleeve that protrudes upwardly from a body of the dielectric insulator plate into an opening of the canister lid through which the first terminal post and the second terminal post extend, wherein the first terminal post and the second terminal post extend through the insulator sleeve and the insulator sleeve electrically isolates the first terminal post and the second terminal post from the canister lid.

28. The biopesticide generating apparatus of claim 27, further comprising: A first elastomeric seal and a second elastomeric seal, the first elastomeric seal surrounding each of the first terminal post and the second terminal post for sealing between a bottom side of the body of the dielectric insulator plate and a plate connection member that provides electrical connection between the first terminal post and the second terminal post and the plurality of first electrode plates and plurality of second electrode plates; The second elastomeric seal surrounds each of the first terminal post and the second terminal post for sealing between a top side of the body of the dielectric insulator plate and the bottom side of the canister lid.

29. The biological disinfectant generating device of claim 20, wherein, The lower base has a composite construction including an inner portion and an outer portion surrounding the inner portion, the inner portion being composed of a first polymeric material, the outer portion being composed of a second polymeric material, wherein the second polymeric material is softer than the first polymeric material.

30. The biopesticide generating device of claim 29, wherein, The inner portion and outer portion are co-molded.

31. The biological disinfectant generating device of claim 29, wherein, The first polymeric material is a thermoplastic material and the second polymeric material includes silicone.

32. The biological disinfectant generating device of claim 29, wherein, The first polymeric material is a plastic and the second polymeric material is an elastomer.

33. The biological disinfectant generating device of claim 29, wherein, The outer portion defines a central opening, the inner portion is positioned in the central opening, wherein the outer portion extends radially outward from the inner portion, wherein the heat sink defines a heat sink opening, the inner portion is positioned in the heat sink opening, wherein the heat sink includes a bottom surface that opposes and is in contact with a bottom wall portion of the outer portion, wherein the outer portion further includes an integral seal portion that circumferentially surrounds the outer portion, the integral seal portion wraps around a perimeter portion of the heat sink, and seals the lower base relative to a top cover of the electrical circuit housing.

34. The biological disinfectant generating device of claim 33, wherein, The bottom wall portion has a thickness between the heat sink and the canister cover of less than 1.5 mm to increase heat transfer, and wherein the bottom wall portion is an elastomer that is compressed during installation of the canister cover to reduce air gaps created by surface imperfections of opposing surfaces of the bottom wall portion and the canister cover to increase heat transfer.

35. The biopesticide generating device of claim 34, wherein, The electrode arrangement is mounted to the canister cover, wherein the first electrode includes a plurality of first electrode plates electrically coupled to first terminal posts, wherein the second electrode includes a plurality of second electrode plates electrically coupled to second terminal posts, wherein the first terminal posts and the second terminal posts extend through the canister cover and electrode fasteners are secured to the first terminal posts and the second terminal posts to mount the electrode arrangement to the canister cover, wherein the first terminal posts and the second terminal posts extend through the inner portion of the lower base when the electrical circuit housing is mounted on the canister cover, and wherein electrical circuit housing fasteners are secured to the first terminal posts and the second terminal posts to secure the electrical circuit housing to the canister cover.

36. The biopesticide generating device of claim 35, wherein, The first terminal plate and the second terminal plate are at least partially embedded in the inner portion of the lower base, wherein the first terminal plate and the second terminal plate define a threaded base retention opening, wherein the biocide generation device includes a base retention fastener that is threadably connected within the threaded base retention opening to secure the lower base to the top cover of the electrical circuit housing, wherein the first terminal posts and the second terminal posts extend through the base retention fastener, wherein the electrical circuit housing fasteners are seated on the base retention fastener, wherein the first terminal posts and the second terminal posts are electrically connected to the first terminal plate and the second terminal plate, respectively, by the electrical circuit housing fasteners and the base retention fastener, and wherein electrical guides within the electrical circuit housing electrically connect the power conversion circuit to the first terminal plate and the second terminal plate.

37. A biocide generation device, comprising: a housing defining a chamber, the housing having a molded plastic construction including a plastic material defining a port in fluid communication with the chamber, the plastic material defining a helical thread within the port; A port reinforcement ring integrated with the housing and surrounding a port axis of the port for reinforcing the plastic material of the housing, the housing defining the port, the port reinforcement ring having a metallic construction; and An electrode arrangement positioned within the chamber for generating a biocide within the chamber.

38. The biological disinfectant generating device of claim 37, wherein, The housing includes a side wall and a port protrusion protruding from an exterior of the side wall, wherein the port extends through the side wall and the port protrusion.

39. The biological disinfectant generating device of claim 38, wherein, The port reinforcement ring is configured as a cap to be secured on the port protrusion, the cap including a circumferential portion having an inner surface facing radially towards an axis of the port, and a flange portion protruding radially inwardly from the circumferential portion and opposite an axial end of the port protrusion.

40. The biopesticide generating apparatus of claim 39, wherein, The flange portion is perpendicularly oriented relative to the axis of the port.

41. The biological disinfectant generating device of claim 39, wherein, The inner surface of the circumferential portion of the cap opposes an outer circumferential surface of the port protrusion, and wherein the inner surface of the circumferential portion defines at least one interlocking structure to provide interlocking between the cap and the plastic material of the port protrusion, thereby providing retention of the cap on the port protrusion.

42. The biopesticide generating device of claim 41, wherein, The recess is a circumferential groove.

43. The biological disinfectant generating device of claim 41, wherein, The housing includes a gusset integrally molded with the outer circumferential surface of the port protrusion and also integrally molded with the side wall of the housing for reinforcing the port protrusion relative to the side wall of the housing.

44. The biological disinfectant generating device of claim 37, wherein, The port is a first port defining a water inlet in fluid communication with the chamber, wherein the port axis is a first port axis, wherein the housing further defines a second port defining a water outlet in fluid communication with the chamber, wherein the second port defines a second port axis, wherein the housing further defines a third port defining a recirculation port in fluid communication with the chamber, wherein the third port defines a third port axis, wherein the port reinforcement ring is a first port reinforcement ring, wherein the plastic material of the housing defining the second port is reinforced by a second port reinforcement ring integrated with the housing and surrounding the second port axis, wherein the plastic material of the housing defining the third port is reinforced by a third port reinforcement ring integrated with the housing and surrounding the third port axis, and wherein the second and third port reinforcement rings each have a metallic construction.

45. The biopesticide generating device of claim 39, wherein, The cap defines at least one interlocking structure to provide interlocking between the cap and the plastic material of the port protrusion during molding of the port protrusion for improving adhesion of the cap to the plastic material forming the port protrusion.

46. The biological disinfectant generating device of claim 37, wherein, The housing includes a can body having an open end and a closed end, wherein the port is defined through a wall of the can body, wherein the housing further includes a cover plate assembly adapted to be removably secured to the open end of the can body to close the open end of the can body, wherein the cover assembly includes a molded plastic cover secured to the open end of the can body by a molded plastic retention ring fastened to the can body to capture the molded plastic cover within a recess defined at the open end of the can body, wherein the recess is defined by an annular shoulder supporting a sealing ring captured and compressed between the molded plastic cover and the annular shoulder, wherein a reinforcement ring is molded within the molded plastic retention ring, wherein the reinforcement ring has a metal construction and is positioned to overlap an outer peripheral portion of the molded plastic cover when the cover assembly is mounted on the can body, and wherein the outer peripheral portion of the molded plastic cover includes a portion of the molded plastic cover that compresses the sealing ring against the annular shoulder of the can body.

47. The biopesticide generating apparatus of claim 46, wherein, The reinforcement ring is configured to overlap an outer peripheral edge of the plastic cover when the cover assembly is mounted on the can body.

48. The biopesticide generating device of claim 46, wherein, An inner diameter of the reinforcement ring is smaller than an outer diameter of the cover, and an outer diameter of the reinforcement ring is larger than the outer diameter of the cover.

49. The biological disinfectant generating device of claim 46, wherein, An inner diameter of the reinforcement ring is sized between an inner diameter of the sealing ring and / or the annular shoulder and an outer diameter of the sealing ring and / or the annular shoulder.

50. The biological disinfectant generating device of claim 46, wherein, An outer diameter of the reinforcement ring is sized larger than an outer diameter of the sealing ring and / or the annular shoulder.

51. The biological disinfectant generating device of claim 46, wherein, The molded plastic retention ring includes a plastic ear aligned with a plastic ear defined by the can body, wherein the plastic ear of the plastic retention ring is secured to the ear of the can body by a threaded fastener threaded within an internally threaded reinforcement insert molded within the ear of the can body, wherein the internally threaded reinforcement insert has a metal construction and includes at least two outer annular ribs separated by an annular gap into which plastic material of the ear of the can body flows during molding to provide reinforcement retention of the internally threaded reinforcement insert within the ear of the can body.

52. The biological disinfectant generating device of claim 51, wherein, An outer peripheral surface of the annular rib is knurled.

53. The biological disinfectant generating device of claim 37, wherein, The shell includes a canister body having an open end and a closed end, wherein the port is defined through a wall of the canister body, wherein the shell further includes a cover assembly adapted to be removably secured to the open end of the canister body to close the open end of the canister body, wherein the cover assembly includes a molded plastic cover secured to the open end of the canister body by a molded plastic retention ring secured to the canister body, wherein a sealing ring is compressed between the molded plastic cover and the canister body, wherein a reinforcement ring is molded within the molded plastic retention ring.

54. The biological disinfectant generating device of claim 53, wherein, The reinforcement ring is positioned over the molded plastic cover when the molded plastic cover is secured to the canister by the molded plastic retention ring.

55. The biopesticide generating device of claim 54, wherein, The reinforcement ring is positioned over at least a portion of an outer 30% of a radius of the molded plastic cover when the molded plastic cover is secured to the canister by the molded plastic retention ring.

56. A biocide generating device comprising: a shell defining a chamber, the shell having a molded plastic construction, the shell including a canister body having an open end and a closed end, the canister body having an inlet port and an outlet port in fluid communication with the chamber, wherein the shell further includes a cover assembly adapted to be removably secured to the open end of the canister body to close the open end of the canister body, the cover assembly including a molded plastic cover secured to the open end of the canister body by a molded plastic retention ring secured to the canister body to capture the molded plastic cover within a recess defined at the open end of the canister body, wherein the recess is defined by an annular shoulder supporting a sealing ring captured and compressed between the molded plastic cover and the annular shoulder, wherein a reinforcement ring is molded within the molded plastic retention ring, wherein the reinforcement ring has a metal construction and is positioned in alignment with an outer circumferential portion of the molded plastic cover when the cover assembly is mounted on the canister body, and wherein the outer circumferential portion of the molded plastic cover includes a portion of the molded plastic cover that compresses the sealing ring against the annular shoulder of the canister body; and an electrode arrangement positioned within the chamber for generating a biocide within the chamber.

57. The biological disinfectant generating device of claim 56, wherein, The reinforcement ring is configured to overlap an outer circumferential edge of the plastic cover when the cover assembly is mounted on the canister body.

58. The biological disinfectant generating device of claim 56, wherein, An inner diameter of the reinforcement ring is less than an outer diameter of the cover and an outer diameter of the reinforcement ring is greater than the outer diameter of the cover.

59. The biological disinfectant generating device of claim 56, wherein, An inner diameter of the reinforcement ring is sized between an inner diameter and an outer diameter of the sealing ring and / or the annular shoulder.

60. The biopesticide generating apparatus of claim 56, wherein, An outer diameter of the reinforcing ring is sized larger than an outer diameter of the sealing ring and / or the annular shoulder.

61. The biological disinfectant generating device of claim 56, wherein, The molded plastic retaining ring includes plastic ears that align with plastic ears defined by the can body, wherein the plastic ears of the plastic retaining ring are secured to the ears of the can body by threaded fasteners that threadedly connect within internally threaded reinforcing inserts that are molded within the ears of the can body, wherein the internally threaded reinforcing inserts have a metal construction and include at least two outer annular ribs that are separated by an annular gap into which plastic material of the ears of the can body flows during molding to provide reinforcing retention of the internally threaded reinforcing inserts within the ears of the can body.

62. The biological disinfectant generating device of claim 61, wherein, An outer circumferential surface of the annular rib is knurled.

63. A biocide generating device comprising: a housing defining a chamber, the housing having a molded plastic construction, the housing including a can body having an open end and a closed end, the can body having an inlet port and an outlet port in fluid communication with the chamber, wherein the housing further includes a cover plate assembly adapted to be removably secured to the open end of the can body to close the open end of the can body, the cover plate assembly including a molded plastic cover secured to the open end of the can body by a molded plastic retaining ring, wherein a sealing ring is compressed between the molded plastic cover and the can body when the molded plastic cover is secured to the can body, wherein a reinforcing ring is molded within the molded plastic retaining ring, wherein the reinforcing ring has a metal construction and is positioned above the molded plastic cover when the cover assembly is mounted on the can body; and an electrode arrangement positioned within the chamber for generating a biocide within the chamber.

64. The biological disinfectant generating device of claim 63, wherein, The reinforcing ring is positioned at least partially on an outermost 30% of a radius of the molded plastic cover when the molded plastic cover is secured to the can by the molded plastic retaining ring.

65. A biocide generating device comprising: A housing defining a chamber, the housing having a molded plastic construction, the housing including a canister body having an open end and a closed end, the canister body having an inlet port and an outlet port in fluid communication with the chamber, wherein the housing further includes a cover plate assembly adapted to be removably secured to the open end of the canister body to close the open end of the canister body, the cover plate assembly including a molded plastic cover secured to the open end of the canister body by a molded plastic retention ring secured to the canister body to capture the molded plastic cover within a recess defined at the open end of the canister body, wherein the molded plastic retention ring includes a fastener opening, wherein the plastic retention ring is secured to the canister body by a threaded fastener extending through the fastener opening and threadably connected within an internally threaded reinforcement insert molded within the canister body, wherein the internally threaded reinforcement insert has a metallic construction and includes at least two outer annular ribs separated by an annular gap into which plastic material of the canister body flows during molding to provide reinforced retention of the internally threaded reinforcement insert within the canister body; and An electrode arrangement positioned within the chamber for generating a biocide within the chamber.

66. The biological disinfectant generating device of claim 65, wherein, An outer circumferential surface of the annular ribs is knurled, and wherein the reinforcement insert is molded within an ear of the canister body. An outer circumferential surface of the annular ribs is knurled, and wherein the reinforcement insert is molded within an ear of the canister body.

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