Patent Publication Number: US-10330395-B2

Title: Liquid cooling

Description:
PRIORITY INFORMATION 
     This application is a continuation of U.S. application Ser. No. 15/717,313 filed on Sep. 27, 2017, which is a continuation of U.S. application Ser. No. 14/764,341 filed on Jul. 29, 2015 and issued on Oct. 31, 2017 as U.S. Pat. No. 9,803,937, which claims priority to International Application No. PCT/US2013/024037 filed on Jan. 31, 2013. The entire contents of which are incorporated herein by reference. 
    
    
     BACKGROUND 
     Electronic devices have temperature requirements. Heat from the use of the electronic devices is controlled using cooling systems. Examples of cooling systems include air and liquid cooling. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Non-limiting examples of the present disclosure are described in the following description, read with reference to the figures attached hereto and do not limit the scope of the claims. In the figures, identical and similar structures, elements or parts thereof that appear in more than one figure are generally labeled with the same or similar references in the figures in which they appear. Dimensions of components and features illustrated in the figures are chosen primarily for convenience and clarity of presentation and are not necessarily to scale. Referring to the attached figures: 
         FIG. 1  illustrates a block diagram of an assembly to provide liquid cooling according to an example; 
         FIG. 2  illustrates an exploded view of the assembly of  FIG. 1  according to an example; 
         FIG. 3  illustrates a perspective view of the assembly of  FIG. 1  according to an example; 
         FIG. 4  illustrates a block diagram of a cooling system according to an example; 
         FIG. 5  illustrates a cross-sectional view of the cooling system of  FIG. 4  according to an example; 
         FIG. 6  illustrates a schematic diagram of the cooling system of  FIG. 4  according to an example; 
         FIG. 7  illustrates a perspective diagram of the cooling system of  FIG. 4  according to an example; and 
         FIG. 8  illustrates a flow chart of a method to remove heat from a first and second electronic device according to an example. 
     
    
    
     DETAILED DESCRIPTION 
     In the following detailed description, reference is made to the accompanying drawings which form a part hereof, and in which is depicted by way of illustration specific examples in which the present disclosure may be practiced. It is to be understood that other examples may be utilized and structural or logical changes may be made without departing from the scope of the present disclosure. 
     Electronic system designs must balance conflicts between power density, spatial layout, temperature requirements, acoustic noise, and other factors. Air cooling systems typically use heat sinks and fans to remove “waste” heat from the system. The use of heat sinks and fans increase the electrical power required to operate an electronic device in an electronic system, and may cause excessive acoustic noise and lower system density. Liquid cooling can be more efficient than air cooling; however, the liquid cooling typically includes plumbing connections within the electronic devices. As the liquid goes through the plumbing connections the risk of leakage of liquid within the electronic device is introduced. 
     In examples, an assembly is provided. The assembly connects to an electronic device to provide liquid cooling. The heat from the electronic device transfers to the assembly via a dry disconnect. The assembly includes a thermal member, a support member, and a gasket. The thermal member includes an array of cooling pins formed of a thermally conductive material that extend from the thermal member. The support member includes an inlet channel and an outlet channel. The inlet channel to provide a fluid to the array of cooling pins. The outlet channel to receive the fluid from the array of cooling pins. The gasket between the thermal member and the support member to form a cooling channel with a fluid tight seal therebetween. The assembly may be positioned outside of the electronic device to enable the liquid cooling to occur away from the electronic device, reducing the risk of fluid leakage within the electronic device. 
       FIG. 1  illustrates a block diagram of an assembly to provide liquid cooling according to an example. The assembly  100  includes a thermal member  120 , a support member  140 , and a gasket  160 . The thermal member  120  includes an array of cooling pins  122  formed of a thermally conductive material to extend from the thermal member  120 . The support member  140  includes an inlet channel  142  and an outlet channel  144 . The inlet channel  142  to provide a fluid to the array of cooling pins  122 . The outlet channel  144  to receive the fluid from the array of cooling pins  122 . The gasket  160  to be positioned between the thermal member  120  and the support member  140  to form a cooling channel with a fluid tight seal therebetween. 
       FIG. 2  illustrates an exploded view of the assembly of  FIG. 1  according to an example. The thermal member  120  includes the array of cooling pins  122  on one side and a mating member  224  on an opposite side. The array of cooling pins  122  are formed of a thermally conductive material that extend from the thermal member  120  towards the gasket  160  and receive the fluid therebetween. For example, the array of cooling pins  122  may include a plurality of solid protrusions arranged in an array of columns and rows to transfer heat to the fluid. The solid protrusions extend from a planar portion of the thermal member  120 , i.e., a portion that forms the mating member  224 , and extend towards the gasket  160 , The mating member  224  to be positioned adjacent to a heat block that is thermally connected to the electronic device. The mating member  224  receives heat from an electronic device via the heat block. The fluid is distributed to a cooling channel where the fluid contacts the array of cooling pins  122  to remove the heat therefrom. 
     The support member  140  includes an inlet channel  142  and an outlet channel  144 . For example, the support member  140  may be formed of an aluminum extrusion with the inlet and outlet channels  142 ,  144  or cavities formed therein. The inlet and outlet channels  142 ,  144  are separated by a wall and/or an air channel  246  that reduces thermal transfer between the inlet and outlet channels  142 ,  144 . The support member  140  may further be utilized to retain a clamp member  270  or other securement structures useable with the assembly  100 . For example, the air channel may be used to retain the clamp member  270 . The support member  140  may further include additional structural members, such as a guide structure formed in the aluminum extrusion to position the support member  140  as it is being inserted into a rack or shelf in alignment with the compute module. The guide structures may mate or engage with the rack or shelf to hold the support member  140  in an engaged position. 
     The inlet channel  142  to provide a fluid to the array of cooling pins  122 . The inlet channel  142  receives the fluid and transports the fluid therethrough towards the cooling channel. The fluid enters the cooling channel via an inlet interface  267  formed therein. The inlet channel  142  may include a fluid control mechanism  243  including at least one protrusion  245  extending across the inlet channel  142  to evenly or uniformly distribute the fluid to a cooling channel. For example, the fluid may encounter an array of protrusions and/or at least one elongated protrusion  245  to slow the flow of the fluid. The fluid control mechanism  243  controls the flow of the fluid using resistance, such as hydraulic or fluid resistance, to evenly or uniformly distribute the fluid across each of the thermal members  120 , The resistance prevents the fluid from flowing past any one of the inlet apertures  266 , which would shift the balance of the pressure. 
     The outlet channel  144  to receive the fluid from the array of cooling pins  122 . The outlet channel  144  receives the fluid from the cooling channel and transports the fluid away from the cooling channel. The outlet channel  144  receives the fluid via an outlet interface  269  formed therein. The outlet channel  144  may also include a fluid control mechanism  243  similar to that described with respect to the inlet channel  142 . The fluid control mechanism  243  to control the flow of the fluid out of the outlet channel  144  and balance the pressure in the assembly  100 . 
     The flow of the fluid in the assembly  100  may further be controlled by at least one valve  250 , such as a thermally actuated valve or a valve actuated by other control mechanisms. The valve  250  may be positioned in the cooling channel, inlet channel  142 , and/or outlet channel  144  depending on design and pressure constraints. For example, valve  250  includes at least one thermally actuated valve to control the flow of the fluid through the cooling channel by extending and retracting based on the temperature of the fluid in the cooling channel. The thermally actuated valve connects to the support member  140 . The thermally actuated valve extends through the outlet channel  144  and the gasket  160  into a cooling channel formed between the thermal member  120  and the gasket  160 . The gasket  160  may provide a seal between the outlet channel  144  and the cooling channel, for example, a seal formed between the outlet apertures  268  and the outlet interface  269 . 
     The thermally actuated valve includes a valve fitting  252 , a valve body  254 , and a resilient member  256  therebetween, The valve fitting  252  includes, for example, a threaded installation fitting within the valve fitting  252 . The valve fitting  252  is fastened to the support member  140 , such that the valve fitting  252  is securely attached and not moveable, 
     The valve body  254  is illustrated as a hollow “bell” chamber that contains the wax member therein. For example, the wax member expands as the temperature of the fluid contacting the valve body  254  increases in temperature. The expansion of the wax member causes a diaphragm (not shown) within the hollow “bell” chamber to press on a rod (not shown) that extends from the valve fitting  252  into the center of the valve body  254 . The valve fitting  252  and rod do not move since the valve fitting  252  is fastened to the support member  140 . However, the pressure on the rod causes the valve body  254  to extend into the cooling channel to enable the flow of the fluid through the outlet apertures  268  and the outlet interface  269  as the thermally actuated valve extends. 
     The resilient member  256  enables the valve fitting  252  to extend and retract based on the thermal expansion and contraction of the wax member within the valve body  254 . For example, the resilient member  256  may be a return spring that provides a return force that retracts the resilient member  256  as the temperature of the wax decreases and the wax member contracts. The retraction of the resilient member  256  causes the rod to retract and restrict the flow of the fluid past the thermally actuated valve when closed. 
     The thermally actuated valve controls the temperature of the fluid within the cooling channel by controlling the amount of fluid that flows out of the support member  140 . For example, the thermally actuated valve controls the effective aperture opening of the outlet aperture  268  as a function of the fluid temperature. In other words, the fluid at a predefined temperature causes the thermally actuated valves to extend and increase the outlet aperture  268  openings. While at a lower temperature, the thermally actuated valves may be fully retracted, thereby decreasing the outlet aperture  268  openings. 
     The thermally actuated valves may also control the removal of the fluid by blocking the outlet apertures  268  until a predefined temperature is attained. For example, the thermally actuated valves retard heat removal if the fluid is less than the predefined temperature. By regulating the temperate at which the fluid exits the cooling channel and the assembly  100 , the heat contained within the fluid may be consistently reused for other purposes, such as heating a building that houses the electronic device. The thermally actuated valves may also improve performance in “energy re-use” applications, such as using “waste” heat from a server rack to heat a building. 
     Even when the valve  250  is closed, a small amount of fluid may be allowed to flow out of the cooling channel, into the outlet channel  144 , and out of the assembly  100  through the outlet member  294 . The small amount of fluid is continuously released via, for example, a fluid release member  258 , illustrated as a small aperture extending from the outlet apertures  268  and/or the outlet interface  269 . The fluid release member  258  allows air to escape from the cooling channel when the fluid initially flows across the array of cooling pins  122 . Thereafter, the fluid release member  258  allows a small continual flow of fluid through the assembly  100 . The fluid release member  258  is optional and may be used to ensure that fluid contacting the valve  250  is representative of the temperature of the fluid in the thermal member  120 . 
     The release of the heated fluid via the valves  250  also enables the fluid at a lower temperature to be continually supplied, which regulates the temperature of the fluid that flows across the array of cooling pins  122  and continually enables removal of heat from the thermal member  120 . It should be noted that the valves  250  are intended to alter the flow of the fluid. The use of the thermally activated valves to regulate flow of the fluid may increase or reduce the volume of the water flowing through the cooling channel. For example, the valves  250  may limit the flow of the fluid to only allow the fluid to exit when the fluid reaches a predefined temperature. 
     The gasket  160  to be positioned between the thermal member  120  and the support member  140  to form a cooling channel with a fluid tight seal therebetween, i.e., along the perimeter of the cooling channel  326 . The gasket  160  includes a seal member  264 . The seal member  264  extends between the thermal member  120  and the support member  140  and selectively compresses to align the mating member  224  flush with a heat block that receives heat from an electronic device. For example, the seal member  264  extends past the perimeter of the thermal member  120  and support member  140  to provide a fluid tight seal therebetween. The seal member  264  may be formed of a silicone or rubber material. The fluid tight seal also prevents fluid from leaking and/or bypassing the array of cooling pins  122 . The array of cooling pins  122  may extend to contact the gasket  160  to provide additional assurance that the fluid does not bypass the cooling pins. The compressible gasket  160  enables the array of cooling pins  122  to contact the gasket  160  and form the fluid tight seal. 
     The compressibility of the seal member  264  also provides the ability to properly align the thermal member  120  against the heat block such that the thermal member  120  lies flush with the heat block and forms a thermal connection that transfers heat therebetween via a dry disconnect. For example, the seal member  264  may be compressed one to two millimeters to enable fine alignment of the thermal member  120  and account for adjustments necessary to accommodate tolerances between the thermal member  120  and the heat block and improve surface contact therebetween. 
     The gasket  160  further includes an inlet aperture  266  and at least one outlet aperture  268 , illustrated as two outlet apertures. The inlet aperture  266  interfaces with the inlet channel  142  at the inlet interface  267  and the outlet aperture  268  interfaces with the outlet channel  144  at the outlet interface  269 . The inlet and outlet apertures  266 ,  268  may provide a seal around the openings to prevent leaks around to inlet and outlet interfaces  267 ,  269 . Moreover, when the valve  250  is inserted through the inlet and/or outlet apertures  266 ,  268 , the inlet and outlet apertures  266 ,  268  provide thermal isolation to prevent contamination of the fluids in the inlet and/or outlet channels  142 ,  144  from being heated or cooled by the water in the cooling channel, i.e., the fluid surrounding the array of cooling pins  122 . 
     A support member  140  supports at least one thermal member  120 . For example, the assembly  100  illustrated includes two thermal members  120  connected to a support member  140 . The thermal members  120  may be connected to the support member  140  and the gasket  160  using, for example, at least one fastener  229 , such as such as a clip, an adhesive gasket, and/or a screw. The fluid control mechanism  243  may be a separate insert to slideably attach to the inlet channel  142 . For example, the fluid control mechanism  243  may include an orifice or a first protrusion  245  prior to the inlet interface  267  of the first thermal member  120 A and a second protrusion  245  prior to the inlet interface  267  of the second thermal member  120 B. The assembly  100  also illustrates that the support members  140  may be connected to one another using a connector member  280  that enables movement or adjustment between the support members  140 . The movement allows for the thermal member  120  to mate and align with a heat block by taking into account tolerance and alignment variations between adjacent heat blocks, i.e., the movement allows angular adjustments. 
     The assembly  100  may further include a clamp member  270  that encases the support member  140 . The clamp member  270  may hold the thermal member  120  and gasket  160  together. The clamp member  270  may also hold the whole assembly  100  against the heat block to provide pressure and improve the thermal connection between the thermal member  120  and the heat block. For example, the clamp member  270  is formed of stainless to provide strength and withstand high yield stress. The clamp member  270  may include a straddle clamp to engage with the air channel  246 . A spring or springs may be used to provide a force to pull the thermal member  120  towards the heat block on the electronic device. The spring may be loaded and/or unloaded using, for example, a mechanical assembly with gears to load and unload the springs. 
     The assembly  100  may also include an end cap  290  with an inlet member  292  and an outlet member  294 . The end cap  290  may be formed of a rigid member, such as a dense piece of foam. The inlet member  292  and the outlet member  294  are connected to the inlet channel  142  and the outlet channel  144 , respectively. For example, the inlet member  292  and the outlet member  294  are positioned diagonal to one another. A fluid supply line  196  is connected to the inlet member  292  to supply fluid to the inlet channel  142  and fluid return line  298  is connected to the outlet member  194  to remove the fluid from the outlet channel  144 . A fastener  299 , such as a clip, an adhesive gasket, and/or a screw, may also be used to secure the end cap  290  to the support member  140 . 
     The fluid enters the assembly  100  at the end cap  290 . The temperature of the fluid that enters the assembly  100  may be optionally monitored and set at a predefined temperature (range) prior to use in the assembly  100 . The fluid temperature rises as the fluid absorbs heat from the thermal members  120 . The fluid typically exits the assembly  100  at a higher temperature. The fluid exchanges between the end cap  290 , the inlet and outlet channels  142 ,  144 , the gasket  160 , and the thermal member  120  are the only fluid exchanges required in the assembly  100 . The assembly  100  provides an efficient liquid cooling method that cools electronic devices by removing heat transported to the heat block, such as an outer surface of electronic device without the risk of leakage within the electronic device. For example, in a server the liquid cooling occurs at the rack level instead of the server level where the central processing unit and other electronic components are located. 
       FIG. 3  illustrates a perspective view of a portion of the assembly  100  of  FIG. 1  according to an example. The assembly  100  illustrates an alternate example of the thermal member  120  with an array of cooling pins  122 , the gasket  160  with a flexible side wall  366 , and a clamp member  270 . The array of cooling pins  122  extend from the thermal member  120  towards the gasket  160 . 
     The gasket  160  includes a seal member  264  to engage with the support member  140 . The seal member  264  includes a flexible side wall  366  formed to extend from the perimeter of the thermal member  120 . The flexible side walls  366  encase the array of cooing pins  122  therein to form a cooling channel  326 . The flexible side wall  366  selectively compresses to align the mating member  224  flush with a heat block that receives heat from an electronic device. 
     The clamp member  270  includes a first clamp  372 , a second clamp  374 , and a cross bar  376  between the first clamp  372  and the second clamp  374 . The cross bar  376  engages with a load structure  378  that allows the assembly  100  to pivot when the flexible side walls  366  are compressed, to provide better contact and alignment with a mating surface of the heat block. 
       FIG. 4  illustrates a block diagram of a cooling system  400  according to an example. The cooling system  400  includes a thermal member  120 , a support member  140 , a gasket  160 , and a connector member  280 . 
     The thermal member  120  includes an array of cooling pins  122  formed of a thermally conductive material that extend from the thermal member  120 . The support member  140  includes an inlet channel  142  and an outlet channel  144 . The inlet channel  142  to provide a fluid to the array of cooling pins  122 . The outlet channel  144  to receive the fluid from the array of cooling pins  122 . The gasket  160  to be positioned between the thermal member  120  and the support member  140  to form a cooling channel  326  with a fluid tight seal therebetween. The connector member  280  extends from the support member  140  to provide movement of the support member  140  during alignment of the thermal member  120  with a heat block. 
       FIG. 5  illustrates a cross-sectional view of the cooling system of  FIG. 4  according to an example. The thermal member  120  includes the array of cooling pins  122  on one side and a mating member  224  on an opposite side. The array of cooling pins  122  are formed of a thermally conductive material that extend from the thermal member  120  towards the gasket  160  and receive the fluid therebetween. For example, the array of cooling pins  122  may include a plurality of solid protrusions arranged in an array of columns and rows. The solid protrusions extend from a planar portion of the thermal member  120  and extend towards the gasket  160 . The mating member  224  to be positioned adjacent to a heat block such that the mating member  224  receives heat from an electronic device. The fluid is distributed to a cooling channel  326  and contacts the array of cooling pins  122  to remove the heat therefrom. 
     The support member  140  includes an inlet channel  142  and an outlet channel  144 . The inlet channel  142  to provide a fluid to the array of cooling pins  122 . The inlet channel  142  receives the fluid and transports the fluid therethrough towards the cooling channel  326 . The inlet channel  142  may include a fluid control mechanism  243  including at least one protrusion  245  extending across the inlet channel  142  to evenly or uniformly distribute the fluid to a cooling channel  326 . The outlet channel  144  to receive the fluid from the array of cooling pins  122 . The outlet channel  144  to receive the fluid from the cooling channel  326  and transport the fluid away from the cooling channel  326 . 
     At least one valve  250  connects to the support member  140 . The valve  250  includes a thermally actuated valve or a valve actuated by other control mechanisms. The valve  250  extends through the outlet channel  144  and the gasket  160  into a cooling channel  326  formed between the thermal member  120  and the gasket  160 . For example, a thermally actuated valve controls the flow of the fluid through the cooling channel  326  by extending and retracting based on the temperature of the fluid in the cooling channel  326 , as described above with reference to  FIG. 2 . The gasket  160  may provide a seal between the outlet channel  144  and the cooling channel  326 , for example, a seal formed between the outlet apertures  268  and the outlet interface  269 . 
     The gasket  160  to be positioned between the thermal member  120  and the support member  140  to form a cooling channel  326  with a fluid tight seal therebetween, i.e., along the perimeter of the cooling channel  326 . The gasket  160  includes a seal member  264  to mate with the support member  140 . The seal member  264  extends between the thermal member  120  and the support member  140 . The seal member  264  may be formed of a silicone or rubber material. The compressible gasket  160  enables the array of cooling pins  122  to contact the gasket  160  and form a fluid tight seal. 
     The compressibility of the seal member  264  also provides the ability to properly align the thermal member  120  against the heat block such that the thermal member  120  lies flush with the heat block and forms a thermal connection that transfers heat therebetween via a dry disconnect. The seal member  264  selectively compresses to align the mating member  224  flush with a heat block that receives heat from an electronic device. For example, the seal member  264  may be compressed one to two millimeters to enable fine alignment of the thermal member  120  and account for adjustments necessary to accommodate tolerances between the thermal member  120  and the heat block and improve surface contact therebetween. 
     The gasket  160  further includes an inlet aperture  266  and at least one outlet aperture  268 , illustrated as two outlet apertures. The inlet aperture  266  interfaces with the inlet channel  142  at an inlet interface  267  and the outlet aperture  268  interfaces with the outlet channel  144  at an outlet interface  269 . The inlet and outlet apertures  266 ,  268  may provide a seal around the openings to prevent leaks around to inlet and outlet interfaces  267 ,  269 . Moreover, when the valve  250  is inserted through the inlet and/or outlet apertures  266 ,  268 , the inlet and outlet apertures  266 ,  268  provide thermal isolation to prevent contamination of the fluids in the inlet and/or outlet channels  142 ,  144  from being heated or cooled by the water in the cooling channel  326 , i.e., the fluid surrounding the array of cooling pins  122 . 
     When assembled, a cooling channel  326  is formed between the thermal member  120  and the gasket  160 . The cooling channel  326  forms in the space between the array of cooling pins  122  and the support member  140 . The array of cooling pins  122  are illustrated in  FIG. 5  as contacting the gasket  160  and the support member  140  to distribute stress of the compression across the whole array of cooling pins  122  and aid in maintaining the fluid tight seal. However, other arrangements of the array of cooling pins  122  may vary and a portion of the array of cooling pins  122  may not contact the gasket  160 . 
     The gasket  160  seals the fluid in the cooling channel  326 . For example, the seal member  264  extends past the perimeter of the thermal member  120  and support member  140  to provide a fluid tight seal therebetween. The fluid tight seal also prevents fluid from leaking and/or bypassing the array of cooling pins  122 . The array of cooling pins  122  may extend to contact the gasket  160  to provide additional assurance that the fluid does not bypass the cooling pins. 
     A support member  140  supports at least one thermal member  120 . For example, two thermal members  120  may be connected to a support member  140 . The thermal members  120  may be connected to the support member  140  and the gasket  160  using, for example, at least one fastener  229 , such as a clip, an adhesive gasket, and/or a screw. The fluid control mechanism  243  may be a separate insert to slideably attach to the inlet channel  142 . For example, the fluid control mechanism  243  illustrated above in  FIG. 2  includes a first protrusion  245  prior to the inlet interface  267  of the first thermal member  120 A and a second protrusion  245  prior to the inlet interface  267  of the second thermal member  120 B. The support member  140  may be encased by a clamp member  270  that holds the thermal member  120  and gasket  160  together. For example, the clamp member  270  is a stainless steel straddle clamp. 
     The cooling system  400  illustrates that the support members  140  may be connected to one another using a connector member  280  that enables movement or adjustment between the support members  140 . The movement allows for the thermal member  120  to mate and align with a heat block by taking into account tolerance and alignment variations between adjacent heat blocks, i.e., the movement allows angular adjustments. The alignment variations enable angular rotation and positioning of the thermal member  120  and support member  140 . For example, the support member  140  includes a first support member  140 A and a second support member  140 B, and a connector member  280  therebetween. The first support member  140 A and the second support member  140 B to provide movement of the first support member  140 A and the second support member  140 B independent of one another using flexibility built into the connector member  280  and the compressible gasket  160 . 
     The connector member  280  includes an inlet connector  582  and an outlet connector  584 . For example, the inlet connector  582  and the outlet connector  584  form a channel connector to connect to the inlet channel  142  and the outlet channel  144 . The inlet and outlet connectors  582 ,  584  may be formed in the support members  140 , such that the inlet connector  582  receives a flexible inlet channel  586  and the outlet connector  584  receives a flexible outlet channel  588 . The flexible inlet channel  586  to provide a flexible connection with the inlet channel  142  via the inlet connector  582 . The flexible outlet channel  588  to provide a flexible connection with the outlet channel  144  via the outlet connector  584 . The flexible inlet and outlet channels  586 ,  588  may be formed of flexible tubes that may be inserted into the inlet and outlet connectors  582 ,  584  respectively to allow for movement and/or alignment of the thermal members  120  for optimal mating with a heat block. The inlet and outlet connectors  582 ,  584  may be formed within a connector cap  581  that is attached to a portion  583  of the support member  140 . The connector cap  581  may be formed of a rigid member, such as a dense piece of foam, that is formed to receive the flexible inlet and outlet channels  586 ,  588 . The connector caps  581  to allow inlet and outlet tubes of various lengths to be slideably inserted therein. 
     The support member  140  may also include an end cap  290  with an inlet member  292  and an outlet member  294  attached thereto, as illustrated in  FIG. 2 . The inlet member  292  and the outlet member  294  are connected to the inlet channel  142  and the outlet channel  144 , respectively. For example, the inlet member  292  and the outlet member  294  are positioned diagonal to one another. A fluid supply line  196  is connected to the inlet member  292  to supply fluid to the inlet channel  142  and fluid return line  298  is connected to the outlet member  194  to remove the fluid from the outlet channel  144 . A fastener  299 , such as a clip, an adhesive gasket, and/or a screw, may also be used to secure the end cap  290  to the support member  140 . 
       FIG. 6  illustrates a schematic diagram of the cooling system  400  of  FIG. 4  according to an example. The cooling system  400  is illustrated connected to an electronic device  600 . The mating member  224  of the thermal member  120  is illustrated as mated with a heat block  630 . The heat block  630  may include, for example, a condenser plate that includes a thermal mating surface  631  that aligns with the mating member  224 , such that the heat is transferred via the thermal mating surface  631 . The heat block  630  may optionally include a thermal interface  633  connected thereto. The thermal interface  633  may be formed of a graphite or elastomer member that fills in the micro structure between the heat block  630  and the mating member  224  of the thermal member  120  to provide a better thermal connection therebetween. Alternatively, the thermal interface  633  may be connected to the mating member  224 . 
     The heat block  630  thermally connects to a heat pipe  632 . The heat pipe  632  thermally connects to a heat sink  634 , such as an evaporator block, to passively remove heat from the heat sink  634 . The heat sink  634  removes heat from an electronic component  636 . The heat sink  634  engages with the electronic component  636  and forms a thermal connection therebetween. The electronic components  636  include, for example, a central processing unit (CPU), a graphical processing unit (GPU), a printed circuit board (PCB), and/or heat producing supplementary devices such as, memory, power supply devices within the electronic component. 
     As illustrated in  FIG. 6 , the fluid enters the cooling system  400  and only enters and exits the cooling system  400  at the end cap  290 . The temperature of the fluid that enters the cooling system  400  may be optionally monitored and/or set to a predefined temperature (range) prior to entry into the cooling system  400 . The fluid temperature rises as the fluid absorbs heat from the thermal members  120 . The fluid typically exits the cooling system  400  at a higher temperature. The fluid exchanges remain within the cooling system  400  and do not enter the electronic device  600 . The cooling system  400  provides an efficient liquid cooling method that cools electronic devices by removing heat transported to the heat block  630 , such as an outer surface of electronic device without the risk of leakage within the electronic device  600 . For example, in a server the liquid cooling occurs at the rack level instead of the server level where the central processing unit and other electronic components  636  are located. 
       FIG. 7  illustrates a perspective diagram of the cooling system  400  of  FIG. 4  according to an example. The cooling system  400  illustrates how heat from an electronic device  600 , such as a server within a server enclosure is collected at the heat sink  634 . The heat leaves the heat sink  634  via heat pipes  632 . The heat is transferred from the heat pipes  632  to a heat block  630  that provides a dry disconnect  730  between the electronic device  600  and the thermal member  120 . For example, the dry disconnect  730  is between the server and the server rack  705  that includes the cooling system  400 , including the thermal member  120 , the support member  140 , the gasket  160 , and the connector member  280  as described above. 
     As illustrated and described above in  FIGS. 1-5  the heat is transferred to the thermal member  120 . The heat is transferred from the thermal member  120  to the fluid using the array of cooling pins  122 . The heat exits the thermal member  120  with the fluid, for example the fluid at a higher temperature. The fluid at the higher temperature is removed from the assembly  100  and/or the cooling system  400 , via, for example, the outlet member  294  and the fluid return line  298  of  FIGS. 3 and 5 . 
     Referring back to  FIG. 7 , once removed from the assembly  100 , the fluid is sent  710  to a cooling facility that removes the heat from the fluid using a cooling mechanism, such as a heat exchanger  735 . The fluid with the heat removed therefrom, for example a fluid at a lower temperature, is sent back  720  to the inlet channel  142 , via, for example, the inlet member  292  of  FIGS. 2 and 5 , and through the support member  140  as the process repeats. 
     The modular design of the cooling system  400  simplifies manufacturing, assembly, and maintenance. For example, the electronic device  600  includes a heat block  630  that lines up with the thermal member  120 . The other aspects of the electronic device  600 , such as the electronic components  636 , the heat pipes  632  and heat sink  634  may vary and be interchangeable. Moreover, the modular nature of the cooling system  400  makes it easier to maintain electronic devices, such as allowing for removal of one of the servers without disrupting the other servers. 
       FIG. 8  illustrates a flow chart  800  of a method to remove heat from a first and second electronic device according to an example. The method positions a first support member to thermally connect a first thermal member with a first heat block in block  820 . The first thermal member to receive heat from a first electronic device. In block  840 , a second support member aligned to thermally connect a second thermal member with a second heat block. The second thermal member to receive heat from a second electronic device. 
     The fluid is transported via an inlet channel in block  860 . The inlet channel transports the fluid to the first support member and a first cooling channel receives the fluid and removes heat from the first thermal member. The inlet channel transports the fluid to the second support member via a connector member. A second cooling channel receives the fluid and removes heat from the second thermal member. In block  880 , the fluid is removed via an outlet channel. The outlet channel transports the fluid away from the first support member and the first cooling channel via an outlet member. The outlet channel transports the fluid away from the second support member and a second cooling channel via the connector member that transports the fluid towards the outlet member. 
     Although the flow diagram of  FIG. 8  illustrates specific orders of execution, the order of execution may differ from that which is illustrated. For example, the order of execution of the blocks may be scrambled relative to the order shown. Also, the blocks shown in succession may be executed concurrently or with partial concurrence. All such variations are within the scope of the present invention. 
     The present disclosure has been described using non-limiting detailed descriptions of examples thereof and is not intended to limit the scope of the present disclosure. It should be understood that features and/or operations described with respect to one example may be used with other examples and that not all examples of the present disclosure have all of the features and/or operations illustrated in a particular figure or described with respect to one of the examples. Variations of examples described will occur to persons of the art. Furthermore, the terms “comprise,” “include,” “have” and their conjugates, shall mean, when used in the present disclosure and/or claims, “including but not necessarily limited to.” 
     It is noted that some of the above described examples may include structure, acts or details of structures and acts that may not be essential to the present disclosure and are intended to be exemplary. Structure and acts described herein are replaceable by equivalents, which perform the same function, even if the structure or acts are different, as known in the art. Therefore, the scope of the present disclosure is limited only by the elements and limitations as used in the claims.