The waterproof casing has a housing and a grommet. The grommet is disposed in a hole of the housing. The grommet has a body, a flange, and a lip. The flange extends radially outward from the body. The lip protrudes from an outer peripheral part of the body and extends in a circumferential direction. The lip has a high compression portion in contact with a wall surface of the hole and a low compression portion adjacent to the high compression portion at a further side from the flange. The low compression portion has a lower compressed state than the high compression portion. The housing has a recess to allow the low compression portion to escape radially outward.

Heat transfer devices, electronic devices, and methods for heat transfer with an external body. Heat transfer devices include a first disc, a second disc positioned adjacent to the first disc, and at least one spacer positioned between the first disc and the second disc. The first disc defines an aperture and comprises a pin cooling structure extending from around the aperture. The pin cooling structure comprises a distal end configured to facilitate heat exchange between the pin cooling structure and an external/adjacent/separate body and one or more side walls. At least one of the one or more side walls, the distal end, and the aperture at least partially define a pin volume. The second disc defines an inlet that is configured to (i) receive a fluid, and (ii) allow the fluid to flow from the inlet and into the pin volume.

Cooling plates are generally directed to accommodating static and dynamic variations in heat dissipation requirements across a plurality of heat-dissipating components while maintaining efficient transfer of heat away from the heat-dissipating components. For example, a cooling plate may include a housing, a diaphragm, a plurality of ribs, and at least one fin. The housing and the diaphragm may collectively define a chamber enclosed relative to a contact surface of the diaphragm. The plurality of ribs and the at least one fin collectively defining a plurality of channels in the chamber. The at least one fin may be coupled to the diaphragm in the chamber, and the at least one fin may be movable toward the housing (e.g., to define at least a portion of a subset of the plurality of channels) in response to external pressure on the contact surface from one or more heat-dissipating devices of a circuit pack.

A pressure relief valve for a two-phase immersion cooling system is configured to support fluid flow rates up to 500 cfm, 550 cfm, 600 cfm, or even 2000 cfm. This, in turn, allows the cooling system to support computing systems with a power density greater than 250 kW. This is accomplished by the valve having a relatively large passage (e.g., 2-6 inch diameter), a relatively large spring (e.g., 1.5-1.7 inch diameter), and a guide rod rigidly coupled to the poppet and slidably coupled to a guide plate. The valve may be used as an outlet valve and coupled to an adsorbent chamber to reduce the loss of coolant from the system as air is vented to an ambient environment. The valve may be used as an inlet valve and coupled to an adsorbent chamber to reduce the intake of water vapor as air from the ambient environment flows into the system.

A vibration isolating thermally conductive connector includes a first thermally conductive element configured to draw heat from a heat source, a second thermally conductive element separated from the first thermally conductive element, and a flexible seal connected with the first and second thermally conductive elements and defining an enclosed cavity between the elements. The enclosed cavity contains a thermally conductive liquid, and allows limited movement of the second and first thermally conductive elements with respect to each other while maintaining thermal connection.

A water cooling module includes a flow-guiding main body and a pump set. The flow-guiding main body includes a first inlet, a first outlet and a flow-guiding passage set. The flow-guiding passage set includes a plurality of flow-guiding passages, and the first inlet and the first outlet are respectively communicable with one of the flow-guiding passages. The pump set includes a first pump having a first water inlet and a first water outlet, and a second pump having a second water inlet and a second water outlet. The first water inlet and the first water outlet are respectively communicable with one of the flow-guiding passages; the second water inlet and the second water outlet are also respectively communicable with one of the flow-guiding passages. The flow-guiding main body replaces rubber pipes to guide working fluid without the problem of oxidized and leaked pipes while providing prolonged service life.

A water cooling module includes a flow-guiding main body and a pump set. The flow-guiding main body includes a first inlet, a first outlet and a flow-guiding passage set. The flow-guiding passage set includes a plurality of flow-guiding passages, and the first inlet and the first outlet are respectively communicable with one of the flow-guiding passages. The pump set includes a first pump having a first water inlet and a first water outlet, and a second pump having a second water inlet and a second water outlet. The first water inlet and the first water outlet are respectively communicable with one of the flow-guiding passages; the second water inlet and the second water outlet are also respectively communicable with one of the flow-guiding passages. The flow-guiding main body replaces rubber pipes to guide working fluid without the problem of oxidized and leaked pipes while providing prolonged service life.

A water cooling module includes a flow-guiding main body and a pump set. The flow-guiding main body includes a first inlet, a first outlet and a flow-guiding passage set. The flow-guiding passage set includes a plurality of flow-guiding passages, and the first inlet and the first outlet are respectively communicable with one of the flow-guiding passages. The pump set includes a first pump having a first water inlet and a first water outlet, and a second pump having a second water inlet and a second water outlet. The first water inlet and the first water outlet are respectively communicable with one of the flow-guiding passages; the second water inlet and the second water outlet are also respectively communicable with one of the flow-guiding passages. The flow-guiding main body replaces rubber pipes to guide working fluid without the problem of oxidized and leaked pipes while providing prolonged service life.

A heat transfer system includes a heat source, a first heat exchanger coupled to the heat source to remove heat from the heat source, and a second heat exchanger coupled to the first heat exchanger to remove heat from the first heat exchanger. The heat transfer system also includes a thermal doubler coupled to the second heat exchanger to remove heat from the second heat exchanger, a first heat pipe coupled to the thermal doubler to remove heat from the thermal doubler, and a second heat pipe coupled to the first heat pipe to remove heat from the first heat pipe.

A bellows assembly and related methods are described. The bellows assembly can be used in a two-phase immersion cooling system to regulate pressure in a tank's airspace above a coolant liquid. The bellows assembly can include a flexible container and pressure-release valves located to reduce emissions of coolant liquid vapor into an ambient environment.