Improved Filtration Design for Submerged Cooling Tank Systems

Abstract

A filtration system for a tank includes a filter housing, at least a portion of which is disposed within the tank and in fluid communication with a dielectric fluid within the tank; at least one filtration element disposed within the filter housing; and a fluid pump, at least a portion of which is disposed within the filter housing and immersed in the dielectric fluid, the fluid pump in fluid communication with the at least one filtration element.

Description

Summary of the Invention

[0001] In some aspects herein, a filtration system for a tank is provided that includes a filter housing, at least a portion of the filter housing disposed within the tank and in fluid communication with a dielectric fluid in the tank, at least one filtration element disposed within the filter housing, and a fluid pump, at least a portion of the fluid pump disposed within the filter housing and immersed in the dielectric fluid such that the fluid pump is in fluid communication with the at least one filtration element.

[0002] In some aspects herein, a method of filtering a fluid in a tank is provided, the method including: disposing at least one filtration element in a filter housing including a fluid inlet and a fluid outlet; disposing a fluid pump in the filter housing such that it is in fluid communication with the at least one filtration element, the fluid inlet, and the fluid outlet; immersing at least a portion of the filter housing in a dielectric fluid contained in the tank such that the fluid inlet is in fluid communication with the dielectric fluid; and operating the fluid pump such that the dielectric fluid flows from the fluid inlet through at least a portion of the at least one filtration element to the fluid outlet.

[0003] In some aspects of the invention, an immersion cooling system is provided that includes a tank, at least a portion of which is filled with a dielectric fluid; a filter housing, at least a portion of which is disposed within the tank and in fluid communication with the dielectric fluid, the filter housing including an opening on a surface of the filter housing accessible from outside the tank; at least one filtration element disposed within the filter housing; and a fluid pump, at least a portion of which is disposed within the filter housing and submerged in the dielectric fluid, the fluid pump in fluid communication with the at least one filtration element. [Brief description of the drawings]

[0004] [Figure 1] FIG. 2 is an exploded view of a filter housing assembly according to an embodiment herein. [Diagram 2] FIG. 1 illustrates an exploded view of an immersion cooling system according to an embodiment herein. [Diagram 3] FIG. 2 illustrates a cutaway view of an assembled immersion cooling system according to an embodiment herein. [Figure 4A] 1 is a cutaway view illustrating an embodiment of a sensing system for a filtration system according to an embodiment herein. [Figure 4B] 1 is a cutaway view illustrating an embodiment of a sensing system for a filtration system according to an embodiment herein. [Diagram 5] 1 is a flow chart of a method for filtering a fluid in a tank according to an embodiment herein. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0005] In the following description, reference is made to the accompanying drawings which form a part hereof, and in which various embodiments are shown by way of illustration. The drawings are not necessarily to scale. It is to be understood that other embodiments are contemplated and may be made without departing from the scope or spirit of the specification. Accordingly, the following detailed description is not to be taken in a limiting sense.

[0006] Filtration is a critical part of the operation of immersion cooling tank systems, such as those used to remove excess heat from electronic servers in data centers. Often, materials used in system hardware were not originally designed to be continuously submerged in liquid (e.g., dielectric cooling fluid). Materials (e.g., adhesives, thermal interface materials, sealants, solder pastes, dielectric greases, etc.) can flake off or be extracted from immersed electronic components and redeposit on sensitive electronic components, potentially causing thermal management challenges or corrosion issues. Many immersion cooling systems use filtration systems to clean the fluid of contaminants to avoid costly downtime and system failures.

[0007] Many existing submersion tank designs provide a filtration unit mounted outside the tank. These external filtration systems present several challenges, including external fluid conduits and pump seals that are prone to leaking. Additionally, access to the filters and pump hardware is limited, making system maintenance and associated downtime very expensive.

[0008] To address these issues, according to some aspects herein, a filtration system for a tank (e.g., an immersion cooling system tank) is provided that includes a filter housing, at least one filtration element, and a fluid pump. In some embodiments, the at least one filtration element and the fluid pump are disposed within the filter housing. In some embodiments, at least a portion of the filter housing is disposed within the tank such that the filter housing, the at least one filtration element, and the fluid pump are in fluid communication with a dielectric fluid within the tank.

[0009] In some embodiments, the filtration element may be any suitable filter media or combination of filter media, including, but not limited to, activated carbon, molecular sieves, silica gel, or alumina. In some embodiments, the filtration element may be any suitable commercially available filter "core", such as any of the several filter cores manufactured by the Sporlan Division of Parker Hannifin Corporation, or filter cartridges manufactured by 3M Purification Inc. In some embodiments, the molds and / or forming processes of existing commercially available filtration elements may be modified to make them suitable for a particular housing or application. In some embodiments, a color-changing material (e.g., the organic compound phenolphthalein, or cobalt chloride) may be added to the filtration element to provide an indication of the condition (e.g., remaining life) of the filter media. In some embodiments, one or more sensors may be added on or in proximity to the filtration element so that the condition of the filter media may be provided to a user's external system. In some embodiments, the sensor may be an electronic sensor that monitors the change in the electrical properties of the filter element as it absorbs certain types of contaminants. In some embodiments, the sensor may be a sensor that detects the change in the color-changing material.

[0010] In some embodiments, the fluid pump may be unsealed (i.e., not environmentally sealed against moisture or liquids). In some embodiments, one or more electrical connections from an unsealed pump may be exposed and at least partially submerged in a dielectric fluid. The dielectric fluid may be any suitable dielectric fluid, such as a dielectric cooling fluid (e.g., Novec™ Engineered Fluid manufactured by 3M™, or Galden® perfluoropolyether fluorinated fluid manufactured by Solvay).

[0011] In some embodiments, the filter housing may include an opening (e.g., an open end or access portal) located on a portion of the housing that extends outside the tank (i.e., open and accessible to a system or operator outside the tank). In some embodiments, the filtration system may further include an elongated member (e.g., a central rod or connecting fixture) that connects the filtration element. In some embodiments, the elongated member may also connect a fluid pump to the filtration element. In some embodiments, the filtration element and / or fluid pump may be removable through an opening in the housing using the elongated member (e.g., by pulling the elongated member, the filtration element and / or pump are lifted so that the filtration element and / or pump can be accessed, evaluated, or removed / replaced).

[0012] According to some aspects herein, a method of filtering a fluid in a tank includes disposing at least one filtration element (e.g., filter media) in a filter housing including a fluid inlet and a fluid outlet, disposing a fluid pump in the filter housing such that it is in fluid communication with the at least one filtration element, the fluid inlet, and the fluid outlet, immersing at least a portion of the filter housing in a dielectric fluid contained in the tank such that the fluid inlet is in fluid communication with the dielectric fluid, and operating the fluid pump such that the dielectric fluid flows from the fluid inlet through at least a portion of the at least one filtration element to the fluid outlet. In some embodiments, the fluid inlet and fluid outlet of the filter housing may be the same (i.e., fluid may enter and exit the housing through the same openings / passages in the housing).

[0013] In some embodiments, the method may include including an opening (e.g., an access point) in the filter housing such that the filtration element and / or fluid pump can be removed, observed, or otherwise accessed from outside the tank (i.e., the portion of the filter housing that holds the opening is accessible from a point outside the tank). In some embodiments, the opening may be covered / protected by a cover (e.g., a sanitary lid).

[0014] In some embodiments, the method may include providing a sensor for determining the condition (e.g., remaining life / processing capacity) of the filtration element. In some embodiments, the sensor may be a color change sensor (e.g., a material that changes color through continued exposure to certain conditions, such as reaction with decomposition products in the filter). In some embodiments, the sensor may be an electronic sensor (i.e., a sensor that measures one or more electrical properties of the filter based on the presence or absence of certain compounds or impurities). In some embodiments, the condition indicated by the sensor (i.e., the condition of the filter media) may be obtainable from outside the filter housing without removing the filtration element or fluid pump.

[0015] In some embodiments, one or more electrical connections of the fluid pump may be unsealed (i.e., not environmentally sealed against exposure to fluids or other factors) and may be at least partially submerged in the dielectric fluid in the tank. In some embodiments, the electrical connections for the fluid pump may be simple pin connections that can be easily connected / disconnected for maintenance or replacement of the pump.

[0016] In some embodiments, the method of filtering a fluid in a tank may further include connecting two or more filtration elements or connecting at least one filtration element and a fluid pump, whereby the filtration elements and / or the fluid pump can be removed through an opening in the filter housing using the elongated member. In some embodiments, the elongated member may also be used to insert / install the filtration element and / or the fluid pump into the housing (including connecting an electrical connection of the fluid pump with a mating electrical connection in or accessible through the filter housing).

[0017] According to some aspects of the present disclosure, an immersion cooling system includes a tank at least partially filled with a dielectric fluid, a filter housing at least partially disposed within the tank and in fluid communication with the dielectric fluid, at least one filtration element disposed within the filter housing, and a fluid pump at least partially disposed within the filter housing and submerged in the dielectric fluid, the fluid pump being in fluid communication with the at least one filtration element. In some embodiments, the filter housing includes an opening on a surface of the filter housing that is accessible from outside the tank. In some embodiments, an elongated member (e.g., a connecting central core or bracket) can be used to connect two or more filtration elements or connect at least one filtration element and a fluid pump, and to remove the filtration element and / or the fluid pump through the opening. In some embodiments, the opening can include a removable cover (e.g., a sanitary lid).

[0018] Turning now to the drawings, FIG. 1 provides an exploded cutaway view of a filter housing assembly 100 according to one embodiment herein. In some embodiments, the filter housing assembly 100 may include a filter housing 10. The filter housing 10 may be constructed of any suitable material, particularly any material that does not interact with fluorinated fluids (e.g., dielectric cooling fluids) or contaminants found in the fluid. In some embodiments, these materials may include, but are not limited to, polypropylene, high density polyethylene, and stainless steel. In some embodiments, the filter housing 10 may be generally shaped as a cylindrical or rectangular prism, or any other suitable space that defines a substantially closed internal volume for holding system components (e.g., filter media, fluid pump, etc.). In some embodiments, the filter housing 10 has a cover 50, which may be a lid and / or a sanitary fitting, and may be constructed of the same material as the housing or of a separate material. In some embodiments, the filter housing 10 may have a fluid inlet 14 and a fluid inlet 16. In some embodiments, fluid inlet 14 and fluid outlet 16 may be located in substantially the same location (e.g., different portions of a shared opening in filter housing 10). In some embodiments, fluid inlet 14 and fluid outlet 16 may be located in different portions of filter housing 10. In some embodiments, filter housing 10 includes opening 18 for accessing components housed within filter housing 10.

[0019] In some embodiments, the filter housing assembly 100 may include one or more filter elements 20. The filter elements 20 may be any suitable type of filter media (i.e., a material through which a fluid passes so that some impurities or particles may be removed from the fluid). The filter housing assembly 100 may include any suitable number of filter elements 20, including, but not limited to, 1, 2, 4, 6, 8, 10, or 20. In some embodiments, all of the filter elements 20 may include the same filter media. In some embodiments, one or more subsets of the filter elements 20 may include different filter media. For example, a first subset of the filter elements 20 may include activated carbon to remove hydrocarbon contaminants, a second subset of the filter elements 20 may include activated alumina, and a third subset of the filter elements 20 may include exhibiting alumina (i.e., activated alumina combined with a discoloring material such as phenolphthalein). Any suitable number and combination of filter media may be used within the contemplation of the present disclosure.

[0020] In some embodiments, the filter housing assembly 100 may include a fluid pump 30. In some embodiments, the fluid pump 30 includes electrical contacts 32. In some embodiments, the electrical contacts 32 may not be sealed (i.e., not environmentally sealed against moisture / water). In some embodiments, the electrical contacts 32 may be conductive pins or pads that may be easily connected to mating electrical contacts within the filter housing 10 or may be accessible from outside the filter housing 10 (i.e., by mating with a connector outside the filter housing 10 through an opening in the filter housing 10).

[0021] In some embodiments, the filtration element 20 and the fluid pump 30 may be attached to and connected by the elongated member 40. In some embodiments, the elongated member 40 may be a central core (e.g., a metal shaft that extends over or through the components). In some embodiments, the elongated member 40 may be a mounting fixture or container (e.g., a "sleeve" or cage that encloses the filtration element 20 and / or the fluid pump 30). In some embodiments, the elongated member 40 may connect two or more filtration elements 20 to each other. In some embodiments, the elongated member 40 may connect one or more filtration elements 20 and the fluid pump 30. In some embodiments, the elongated member 40 may be used to remove the filtration element 20 and / or the fluid pump 30 from the opening 18 (i.e., by removing the elongated member 40 through the opening 18, the filtration element 20 and / or the fluid pump 40 may also be removed). In some embodiments, the elongated member 40 may also be used to insert / install the filtration component 20 and / or the fluid pump 30 into the filter housing 10.

[0022] FIG. 2 provides an exploded cutaway view of an immersion cooling system according to one embodiment herein, and FIG. 3 provides a cutaway view of an assembled immersion cooling system. For the following discussion, FIG. 2 and FIG. 3 may be considered together. In some embodiments, immersion cooling system 200 includes a liquid tank 60 and a filter housing assembly 100 (e.g., filter housing assembly 100 of FIG. 1). In some embodiments, assembled filter housing assembly 100 includes a filter housing 10 that houses (or in some embodiments, at least partially houses) a filtration element 20 and a fluid pump 30. In some embodiments, filtration element 20 and fluid pump 30 are connected by elongated member 40 (see FIG. 1). In some embodiments, fluid housing 10 includes a cover 50.

[0023] In some embodiments, tank 60 may be at least partially filled with a dielectric fluid 70 (e.g., a dielectric coolant). In some embodiments, electronics module 65 may be at least partially immersed in dielectric fluid 70. In some embodiments, electronics module 65 may be a computer server, a power supply, one or more memory modules, or any other suitable electronics module or combination thereof.

[0024] In some embodiments, the filter housing assembly 100 may be inserted into the opening or open end 62 of the tank 60 such that the filter housing 10 is at least partially submerged in the dielectric fluid 70 (see FIG. 3). In some embodiments, the dielectric fluid 70 enters the filter housing 10 through the fluid inlet 14 where it is drawn in by the fluid pump 30 and circulated through the interior of the filter housing 10. During circulation through the filter housing 10, the dielectric fluid 70 passes through one or more of the filtration elements 20, which remove impurities from the fluid. After passing through the filter housing 10 and the filtration elements 20, the filtered dielectric fluid 70 may exit the filter housing 10 through the fluid outlet 16 and return to the interior of the tank 60.

[0025] It should be noted that in some embodiments, a portion of the filter housing 10 may extend above or be flush with the outer surface of the tank 60 such that the opening 18 (see FIG. 1 ) of the filter housing 10 is accessible from outside the tank 60. In some embodiments, an operator (not shown) may remove the cover 50 to inspect the filter element 20 and / or the fluid pump 30 and / or remove the filter element 20 and / or the fluid pump 30 from the filter housing 10. In some embodiments, the filter element 20 and the fluid pump 30 are connected by an elongated member 40 and may be removed from the filter housing 10 by pulling the elongated member 40 upward. The electrical connections 32 (see FIG. 1 ) on the fluid pump 30 may be designed to easily connect and disconnect with a mating connector in the filter housing 10 or the tank 60 when removed from the filter housing 10 (e.g., the electrical connector 32 may be a conductive pin conductor that is pressed into a mating receptacle in the filter housing 10 when the pump is lowered into the filter housing 10). The quick connect nature of electrical connection 32 is made possible at least in part by the use of dielectric fluid 70, which is a non-conductive medium that may be used to cool electronic components.

[0026] In some embodiments, the filtration systems described herein may include one or more sensors capable of detecting and indicating the condition of the filter media used (e.g., indicating when a filter replacement is recommended). Figures 4A and 4B provide cutaway views illustrating two alternative embodiments of a sensing system for a filtration system. In the figures, the filtration element 20 and fluid pump 30 are shown as dashed lines to place emphasis on the sensing system.

[0027] In the embodiment of FIG. 4A, the sensing system may include a central electronic module 28 and one or more satellite sensors 24. In some embodiments, the satellite sensors 24 may be connected to the central module 28 via one or more electrical connections 26 (for simplicity, only electrical connections 26 are shown for two of the satellite sensors 24, but in fact one exists for each satellite sensor 24). In some embodiments, the satellite sensors 24 may be sensors that detect a condition or characteristic of the corresponding filtration element 20. For example, in some embodiments, the satellite sensors 24 may be electronic sensors that monitor one or more electrical characteristics of the filtration element 20 (e.g., the ability of the filtration element to conduct electrical current, which may be an indication of the material contained within the filtration element). The central module 28 may receive signals from or poll the individual satellite sensors 24 to determine the condition of the filtration element 20 and provide the condition to an external system or observer (e.g., display an indication that replacement is needed or transmit a message to a control system).

[0028] An alternative type of sensing system is shown in FIG. 4B. In the embodiment of FIG. 4B, the filtration element 20 (shown as 20a / 20b) may be designed such that at least a portion of the filtration element 20b includes a color-changing material (e.g., a material that changes color when reacting with a decomposition product in the filtration element). In such a system, the color-changing sensor 28a may be disposed in an opening on or through the transparent cover 50 so as to optically sense a change in the material covering in the filtration element 20b. In some embodiments, the filtration element 20 may additionally include a section 20a that includes a filter medium but does not include a color-changing material. One advantage of the embodiment of FIG. 4B is that no wired connection is required between the sensing module 28a and the filtration element 20b, which may therefore require less maintenance.

[0029] It should be noted that the sensing systems shown in Figures 4A and 4B are merely examples and are not intended to be limiting in any way. Other sensing methods and sensor types, as well as other arrangements and configurations of filtration elements and fluid pumps, may be contemplated consistent with the present disclosure.

[0030] Finally, FIG. 5 is a flow chart of a method for filtering a dielectric fluid in a tank, such as a tank for an immersion cooling system. In step 510, one or more filter elements (e.g., filter element 20 of FIG. 1) are placed in the filter housing. In step 520, a fluid pump is placed in the filter housing, such that the fluid pump can circulate a fluid (i.e., a dielectric cooling fluid) through the filter housing, and in particular through at least one of the filter elements. In step 530, at least a portion of the filter housing (including the filter elements and the fluid pump) is inserted into a tank at least partially filled with a dielectric fluid, such that at least a portion of the filter housing is immersed in the dielectric fluid. In step 540, the pump is operated such that the dielectric fluid circulates through the filter housing and the filter elements.

[0031] In some embodiments, in an additional step not shown in Figure 5, the filter element and fluid pump may be connected by an elongated member (e.g., a connecting rod, fastener, or a receiving "sleeve") In some embodiments, another additional step is to provide an opening in the filter housing accessible from outside the tank so that the filter element and / or fluid pump can be removed for maintenance or accessed (e.g., removed by grasping and lifting the elongated member connecting the filter element and fluid pump).

[0032] Terms such as "about" will be understood by those of skill in the art in the context in which they are used and described herein. If the use of "about" as applied to quantities describing feature sizes, quantities, and physical characteristics is not clear to those of skill in the art in the context in which it is used and described herein, "about" will be understood to mean within 10 percent of a particular value. A quantity given as about a particular value may be exactly that particular value. For example, if it is not clear to those of skill in the art in the context in which it is used and described herein, an amount having a value of about 1 means that the amount has a value between 0.9 and 1.1, and the value may be 1.

[0033] Terms such as "substantially" will be understood by those of skill in the art in the context in which they are used and described herein. If the use of "substantially equal" is not clear to those of skill in the art in the context in which it is used and described herein, "substantially equal" means approximately equal when approximately is as described above. If the use of "substantially parallel" is not clear to those of skill in the art in the context in which it is used and described herein, "substantially parallel" means within 30 degrees of parallel. Directions or surfaces described as substantially parallel to one another may, in some embodiments, be within 20 degrees of parallel, or within 10 degrees, or may be parallel or nominally parallel. If the use of "substantially aligned" is not clear to those of skill in the art in the context in which it is used and described herein, "substantially aligned" means aligned within 20% of the width of the objects to be aligned. Objects described as being substantially aligned may, in some embodiments, be aligned within 10% or within 5% of the width of the objects to be aligned.

[0034] All references, patents, or patent applications referenced above are hereby incorporated by reference in their entirety. In the event of any inconsistency or contradiction between any portion of the incorporated reference and this application, the information in the foregoing description shall take precedence.

[0035] Descriptions of elements in a figure should be understood to apply equally to corresponding elements in other figures unless otherwise indicated. Although specific embodiments are shown and described herein, those skilled in the art will understand that the specific embodiments shown and described may be replaced by various alternative and / or equivalent embodiments without departing from the scope of the present disclosure. The present application is intended to cover any adaptations or variations of the specific embodiments discussed herein. Accordingly, the present disclosure is intended to be limited only by the claims and their equivalents. Exemplary embodiments are presented below. [Item 1] a filter housing, at least a portion of the filter housing being disposed within the tank and in fluid communication with a dielectric fluid within the tank; at least one filtering element disposed within the filter housing; a fluid pump, at least a portion of which is disposed within the filter housing and submerged in the dielectric fluid, the fluid pump in fluid communication with the at least one filtration element; A filtration system for a tank comprising: [Item 2] Item 14. The filtration system of item 1, wherein the fluid pump is not sealed and the electrical connections of the fluid pump are at least partially immersed in the dielectric fluid. [Item 3] 2. The filtration system of claim 1, wherein the filter housing includes an opening disposed in a portion of the filter housing and accessible from outside the tank, whereby at least one of the at least one filtration element and the fluid pump can be removed through the opening. [Item 4] Item 4. The filtration system of item 3, further comprising an elongated member connecting the at least one filtration element and the fluid pump and accessible through the opening, whereby the filtration element and the fluid pump can be removed through the opening using the elongated member. [Item 5] Item 2. The filtration system of item 1, wherein the tank is an immersion cooling tank for an electronic system. [Item 6] Item 10. The filtration system of item 1, further comprising a sensor for determining a status of the at least one filtration element. [Item 7] 7. The filtration system of claim 6, wherein the sensor is a color change sensor. [Item 8] 7. The filtration system of claim 6, wherein the sensor is an electronic sensor configured to monitor an electrical characteristic of the at least one filtration element. [Item 9] 1. A method of filtering a fluid in a tank, comprising: disposing at least one filtration element within a filter housing having a fluid inlet and a fluid outlet; disposing a fluid pump within the filter housing in fluid communication with the at least one filtration element, the fluid inlet, and the fluid outlet; immersing at least a portion of the filter housing in a dielectric fluid contained within a tank such that the fluid inlet is in fluid communication with the dielectric fluid; operating the fluid pump such that the dielectric fluid flows from the fluid inlet through at least a portion of the at least one filtration element to the fluid outlet; A method comprising: [Item 10] 10. The method of filtering a fluid in a tank according to claim 9, further comprising providing an opening on a portion of the filter housing accessible from outside the tank, whereby at least one of the at least one filtering element and the fluid pump can be removed through the opening. [Item 11] 10. A method for filtering a fluid in a tank according to claim 9, further comprising the step of providing a sensor for determining a condition of the at least one filtering element. [Item 12] 12. A method of filtering a fluid in a tank according to claim 11, wherein the sensor provides a status of the at least one filtering element. [Item 13] 12. The method of filtering a fluid in a tank according to claim 11, wherein the sensor is a color change sensor. [Item 14] 12. The method of filtering a fluid in a tank according to claim 11, wherein the sensor is an electronic sensor configured to monitor an electrical characteristic of the at least one filtering element. [Item 15] 13. The method of filtering a fluid in a tank according to claim 12, wherein the condition of the at least one filtering element is obtainable from the sensor outside the filter housing without removing the at least one filtering element or the fluid pump. [Item 16] 10. The method of filtering a fluid in a tank according to claim 9, wherein the fluid pump is not sealed and an electrical connection of the fluid pump is at least partially immersed in the dielectric fluid. [Item 17] 10. A method for filtering a fluid in a tank according to claim 9, wherein the fluid inlet and the fluid outlet are the same. [Item 18] 10. The method of filtering a fluid in a tank according to claim 9, further comprising the step of connecting the at least one filtering element and the fluid pump with an elongated member, whereby the at least one filtering element and the fluid pump can be removed through an opening using the elongated member. [Item 19] a tank, at least a portion of the tank being filled with a dielectric fluid; and a filter housing, at least a portion of which is disposed within the tank and in fluid communication with the dielectric fluid, the filter housing including an opening on a surface of the filter housing accessible from outside the tank; at least one filtering element disposed within the filter housing; a fluid pump, at least a portion of which is disposed within the filter housing and submerged in the dielectric fluid, the fluid pump in fluid communication with the at least one filtration element; An immersion cooling system comprising: [Item 20] 20. The immersion cooling system of claim 19, further comprising an elongated member connecting the at least one filtration element and the fluid pump, whereby the at least one filtration element and the fluid pump can be removed through the opening using the elongated member.

Claims

1. a filter housing, at least a portion of the filter housing being disposed within the tank and in fluid communication with a dielectric fluid within the tank; at least one filtering element disposed within the filter housing; a fluid pump, at least a portion of which is disposed within the filter housing and submerged in the dielectric fluid, the fluid pump in fluid communication with the at least one filtration element; Equipped with the filter housing includes an opening disposed in a portion of the filter housing and accessible from outside the tank, whereby at least one of the at least one filtration element and the fluid pump can be removed through the opening. Filtration system for tanks.

2. The filtration system of claim 1 , wherein the fluid pump is unsealed and the electrical connections of the fluid pump are at least partially immersed in the dielectric fluid.

3. 2. The filtration system of claim 1, further comprising an elongated member connecting the at least one filtration element and the fluid pump and accessible through the opening, whereby the filtration element and the fluid pump can be removed through the opening using the elongated member.

4. 10. The filtration system of claim 1, wherein the tank is an immersion cooling tank for an electronic system.

5. The filtration system of claim 1 , further comprising a sensor for determining a condition of the at least one filtration element.

6. The filtration system of claim 5 , wherein the sensor is a color change sensor.

7. The filtration system of claim 5 , wherein the sensor is an electronic sensor configured to monitor an electrical characteristic of the at least one filtration element.

8. a tank, at least a portion of the tank being filled with a dielectric fluid; and a filter housing, at least a portion of which is disposed within the tank and in fluid communication with the dielectric fluid, the filter housing including an opening on a surface of the filter housing accessible from outside the tank; at least one filtering element disposed within the filter housing; a fluid pump, at least a portion of which is disposed within the filter housing and submerged in the dielectric fluid, the fluid pump in fluid communication with the at least one filtration element; An immersion cooling system comprising:

9. 10. The submersion cooling system of claim 8, further comprising an elongated member connecting the at least one filtration element and the fluid pump, whereby the at least one filtration element and the fluid pump can be removed through the opening using the elongated member.

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