Abstract: A reactor is proposed for entrained flow gasification for operation with pulverized or liquid fuels, with an externally cooled draft tube protecting the slag discharge outlet. An outlet of the draft tube remains above a water line of a sump of the reactor and is formed from Molybdenum, an alloy featuring molybdenum, Tantalum or an alloy featuring Tantalum.

Abstract: A tubular heat exchanger includes a substantially cylindrical sheathing tube having a center piece and two end pieces of a length which is shorter than a length of the center piece. Two perforated bases are respectively received in the end pieces and sized to occupy a cross section thereof, and two end caps are respectively secured to axial ends of the end pieces. Extending in substantial parallel relationship inside the sheathing tube between the perforated bases are a plurality of internal tubes to thereby define a first fluid space between an inner surface of the sheathing tube and outer surfaces of the internal tubes, and a separate second fluid space bounded by inner surfaces of the internal tubes and the end caps on the end pieces. A lateral connection pipe is secured to each end piece and fluidly communicates with the first fluid space in a region adjacent to the perforated bases for supply and drainage, respectively, of a first fluid flowing through the first fluid space.

Abstract: The present invention relates to an exhaust structure for a clothes dryer in an apartment building. The exhaust structure includes at least one riser pipe mounted in a vertical direction crossing every floor of a building, a plurality of branch pipes branched from the riser pipe to a household in the every floor to guide exhaust gas from the household to the riser pipe, a lint filter provided in each of the plurality of branch pipes to filter lint included in the exhaust gas, a first pressure sensor provided in front of the lint filter to sense a pressure in each of the plurality of branch pipes, and a filter controller to determine whether the lint filter is blocked, by receiving a value of the pressure sensed by the first pressure sensor.

Abstract: Air conditioner pertaining to the present invention in which a synthetic polymer case, in which an antibacterial agent impregnated in a medium such as a porous body or water-absorbing polymer is sealed, is arranged in the upstream airflow side and/or downstream airflow side of an evaporator, which air conditioner is characterized in that the thickness of the wall of the case is formed to allow gas permeation of the antibacterial agent, and in that the thickness of the wall on the downstream airflow side is less than the thickness of the wall on the upstream airflow side.

Abstract: A heat exchanger (15) comprising a plurality of generally parallel passages through which air is to pass in a first direction through a first set of passages (16) and in an opposite direction to said first direction through a second set of said passages (22), the passages of said first set (16) being located adjacent the passages of said second set (22). The heat exchanger (15) further comprising sheet material that separates the first set (16) from the second set (22), and provides for the transfer of heat between said first set (16) and said second set of passages (22).

Abstract: A heat and moisture exchanger for both conducting a stream of air produced by a ventilator to a moisturizing medium and internally bypassing the moisturizing medium if aerosolized medication is introduced into the stream includes a housing having a ventilator-side port coupled to an outlet of a ventilator and a source of aerosolized medication. The housing has a patient-side port for coupling to a patient to provide ventilation including either air or air carrying aerosolized medication. A first path conducts air from the ventilator-side port through the moisturizing medium and the patient-side port, and a second path conducts air carrying aerosolized medication from the ventilator-side port directly to the patient-side port. A two-way valve mechanism in the housing selectively couples the ventilator-side port into fluid communication with one or the other of the first and second paths.

Abstract: A fluid cooling device having at least one heat exchanger device (10) for cooling at least one fluid and having at least one filter device (12) for filtering the fluid which can be conducted to a constancy (14) is characterized in that the device has a follow-up auction device (42) which, if required, conducts missing fluid to the suction side of the consumer (14).

Abstract: An air filter (30) intermittently rotates by a predetermined rotation angle at each time, while being in contact with a bristle portion (51b) of a rotating brush (51). Accordingly, dust on the air filter (30) is scraped by the bristle portion (51b). The brush member (51) rotates about an axial center of a shaft (51a) at each stop of the intermittent rotation of the air filter (30), to come into contact with a cleaning brush member (52). According, dust on the brush member (51) is removed by the cleaning brush member (52).

Abstract: A work vehicle operating in a highly contaminated environment has a radiator with a rotary screen debris removal device upstream of the radiator. The debris thus removed passes through a fan for disposal away from the work machine. The engine is an air breathing fuel consuming engine and has a pre-cleaner for removing larger particles of air delivered to the engine for combustion. A conduit extends from the intake air pre-cleaner to a venturi device adjacent to and upstream of the fan for continuously and effectively removing particles from the engine air pre-cleaner.

Abstract: A method and systems for a purged seal for an annular space are provided. The purged seal includes a first baffle element that extends from an inner surface of the annular space into the annular space at an oblique angle and a second baffle element that extends from an outer surface of the annular space above the first baffle element in a direction opposite gravity flow into the annular space wherein the second baffle element extends at an oblique angle. The system also includes a third baffle element that extends from the inner surface above the first baffle element in a direction of gravity flow into the annular space wherein the third baffle element extends into the annular space at an oblique angle with respect to the inner surface and wherein a distal end of the third baffle element is positioned proximate a distal end of the second baffle element.

Abstract: A tank for use in a system that outputs a liquid at a user defined constant temperature in order to regulate the temperature of a piece of equipment includes a body of material having a plurality of walls which collectively define a chamber for receiving and storing the liquid. The top wall has a manual fill port and one of the other walls includes an outlet port. An auxiliary port is located on the manual fill port and a return fluid port is located on the auto refill port. The body further includes a well which extends down into the chamber from an opening in top wall of the tank and which can be removed. The well is sized to accommodate a deionizer cartridge. When the well is removed, either a heater or an immersion pump can be disposed within the chamber. The tank also features a bag filter, a sight gauge and a flow velocity reducer. Finally, a cover assembly is removably mounted on the manual fill port and includes a funnel shaped cover and a removably sealing plug.

Abstract: A cooling device for engine oil and/or transmission oil, particularly in an internal combustion engine, with an oil cooler which is arranged in an oil pan and through which a coolant flows. The oil cooler is formed by a plate heat exchanger (3) with coolant-carrying and oil-carrying plate intermediate spaces (5, 6). At least some of the oil-carrying plate intermediate spaces (6) open into the oil pan (2) in such a way the oil flows out of the oil pan directly via the opening (24) into the oil-carrying plate intermediate spaces (6).

Abstract: A drag reducing fluid pumped (22) through a heat exchanger (12).

Abstract: A heat dissipation device includes a heat sink (10), a fan (20) disposed on top of the heat sink, a fan duct (30) arranged on the fan and a fan guard (40) sandwiched between the fan and the fan duct. The fan defines a through hole (26) at each corner and includes a plurality of positioning blocks (28) extending from each side edge thereof. The fan duct includes a plurality of connecting portions (32) extending from a circumference of the fan duct near the fan. Each connecting portion includes a post fitted in the through hole and a hook engaging with the positioning block.

Abstract: A work vehicle operating in a highly contaminated environment has a radiator with a rotary screen debris removal device upstream of the radiator. The debris thus removed passes through a fan for disposal away from the work machine. The engine is an air breathing fuel consuming engine and has a pre-cleaner for removing larger particles of air delivered to the engine for combustion. A conduit extends from the intake air pre-cleaner to a venturi device adjacent to and upstream of the fan for continuously and effectively removing particles from the engine air pre-cleaner.

Abstract: A liquid filter heat exchanger unit has a heat exchanger having an inlet through which a liquid is supplied to the heat exchanger and a drain through which the liquid exits after having passed through the heat exchanger. The unit also has a liquid filter with a filter housing and a filter element exchangeably arranged in a receiving chamber, wherein the liquid is supplied through the drain of the heat exchanger to an unfiltered side of the filter element. A bypass connects an inlet passage for supplying the liquid to be filtered to the receiving chamber in the filter housing. A switching member opens and closes the bypass. The switching member is formed by the filter element such that the bypass is closed when the filter element is inserted in the filter housing and is opened when the filter element is removed from the filter housing.

Abstract: A fuel reforming apparatus includes a reforming catalyst, a filtering member, a raw material supply flow passage and a processed gas flow passage. The filtering member has a plurality of cells. A reforming catalyst is carried on a surface of a partition on the side of the processed gas flow passage. If raw gas including hydrocarbon fuel is supplied to the fuel reforming apparatus and filtered by the filtering member, soot included in the raw gas is trapped by gaps in the partition, and the hydrocarbon fuel is reformed into reformed gas including hydrogen and carbon monoxide on the reforming catalyst. By increasing the amount of air supplied from a blower at intervals of time, the soot trapped by the partition is removed by combustion.

Abstract: A thermal module includes a centrifugal fan (10), a fin assembly (20) disposed at an air outlet of the centrifugal fan and two heat pipes (30, 40). The fin assembly includes a plurality of fins (21) connected together. Each fin has a front surface (212) and a rear surface (213) opposite the front surface. An elongated protruding member (218) is formed on the fin and protrudes from the rear surface towards the front surface. A recessed concave (219) corresponding to the protruding member is defined in the rear surface of the fin. At least one slit is defined along the protruding member and communicates with the concave. The protruding member divides the fin into first and second fin portions (20a, 20b). The two heat pipes thermally interconnect the first and second fin portions with two heat generating electronic components, respectively.

Abstract: The present invention relates to an improved air conditioning filter and cooling/heating coil that can easily be applied to new and existing air handling systems. The slant design of these components allows a more efficient heat transfer and particle entrapment than their conventional counterparts. By residing at an angle in their air handling enclosures, and by virtue of their oblique prismatic construction, more filter media can be used and more heat transfer surface area can be incorporated without offering any substantial additional impediments to the flow of air. At angles of 45 degrees air friction of the coil and filter are reduced by 40 to 55 percent.

Abstract: Improvement, in hydraulic systems, such as for vehicle transmissions and the like, in the form of a hydraulic reservoir with integrated heat exchanger having fluid supply/return and fluid return ports, including a central section, having inner and outer shell portions with a first gap therebetween, the outer shell being provided with a plurality of radially-spaced, external cooling fins, longitudinally-directed for the length of the central section; the ends of the latter being closed off via respective bottom and top cap portions, thereby defining a central fluid cavity, the top cap portion having spaced outer and inner cap portions, with a second gap therebetween, with a fluid inlet port, in the outer cap portion, directing incoming fluid from the second gap into and through the entire length of the first gap before entering the central fluid cavity, thereby maximizing heat transfer from the fluid via the plurality of cooling fins.

Abstract: The present invention provides a heat exchanger unit that can save space, even when performing air conditioning in addition to ventilation. The heat exchanger unit performs heat exchange ventilation with a supply air channel flowing from an outdoor space to an indoor space and an exhaust air channel flowing from the indoor space to the outdoor space and includes an optical deodorization portion and a first blowing portion. The optical deodorization portion is provided so as to be linked to at least the indoor space and performs air conditioning with a circulation channel. The circulation channel is provided in the vicinity of either the supply air channel or the exhaust air channel. The first blowing portion includes a double-suction first impeller having a first suction inlet and a second suction inlet. Here, one of the supply air channel and the exhaust air channel that is provided in the vicinity of the circulation channel is provided at the first suction inlet side of the first impeller.

Abstract: A powered precleaner separates debris from atmospheric air through the use of a blower and a separation chamber. The chamber includes people are inlet orifice and at least two exit orifices, including an outlet orifice and an exit orifice containing at least one heat exchanger. The blower blows air and debris along an inner surface of the separation chamber and out of the outlet orifice. The outlet orifice is sized to allow large debris to exit the chamber. Sufficient backpressure is created to cause a predetermined amount of precleaned air to flow through the exit orifice containing the heat exchanger. A screen may be added to trap larger light debris and prevent it from flowing to and plugging the heat exchanger.

Abstract: A humidifier system for heating and humidifying respiratory gases has a housing with an inner chamber, a first port at the first end for connection to a ventilator breathing circuit and a second port at the second end for connection to a patient to supply respiratory gases to the patient and to receive exhaled gases from the patient. A body of heat moisture exchange (HME) material is located within the chamber, and a water permeable device is also located within the chamber. The housing has a water refill inlet communicating with the water permeable device. A water supply outside the housing is connected to the water refill inlet to supply water to the water permeable device. A heater mounted outside the housing supplies heat to the housing and maintains the housing at a selected temperature.

Abstract: A cooling apparatus is disclosed for cooling and dehumidifying the inside of a device such as an electronic device installed outdoors The cooling apparatus of the invention comprises a set of dehumidifying parts, each arranged at an open air intake side and an air exhaust side of a housing of the device respectively, and having filtering members for removing humidity from the open air. When air in the housing is saturated with humidity by air blowing from a fan, the rotational direction of the fan is reversed to thereby change the air flowing direction towards the dehumidification part. A dehumidification material thus receives heated and dried exhaust-air from a heating material and discharges moisture accumulated within the material to the outside, thereby recovering moisture absorption capability of the dehumidification material.

Abstract: A cooling water circulation apparatus capable of limiting attachment of microorganisms and scale in an environmentally friendly manner and a method of removing scale in the cooling water circulation apparatus. An electrolytic device 10 is provided on a cooling water circulation route R1. In the arrangement, mineral contents such as calcium ions and magnesium ions contained in cooling water W are deposited as scale S on an electrode 12A or 12B in an electrolytic step, thereby enabling the mineral contents to be removed from the cooling water W. Even if the hardness of the cooling water W is increased by evaporation of the water with elapse of time, the hardness can be reduced by the electrolytic processing. Thus, the deposition of the scale S in the circulation route R1 can be reduced. Further, the scale S deposited on the electrode 12A or 12B can be easily separated by operating while reversing the polarities of the electrodes 12A and 12B at predetermined time intervals.

Abstract: A heat and moisture exchanger for both conducting a stream of air produced by a ventilator to a moisturizing medium and internally bypassing the moisturizing medium if aerosolized medication is introduced into the stream includes a housing having a ventilator-side port coupled to an outlet of a ventilator and a source of aerosolized medication. The housing has a patient-side port for coupling to a patient to provide ventilation including either air or air carrying aerosolized medication. A first path conducts air from the ventilator-side port through the moisturizing medium and the patient-side port, and a second path conducts air carrying aerosolized medication from the ventilator-side port directly to the patient-side port. A two-way valve mechanism in the housing selectively couples the ventilator-side port into fluid communication with one or the other of the first and second paths.

Abstract: A waterproof thermal management module for a portable electronic device that including a housing and a heat source is disclosed. The waterproof thermal management module includes a separated chamber, a heat absorber, a radiator, a heat pipe and a fan. The separated chamber is set inside the housing and has a first air channel and a second air channel, wherein the first and second air channels communicate with the outside of the housing. The heat absorber is set inside the housing for contacting the heat source. The radiator is set inside the separated chamber. The heat pipe extends from inside the housing through the wall of the separated chamber into the separated chamber and connects the heat absorber and the radiator. The cooling fan is set in the separated chamber.

Abstract: The invention relates to a component (20) for supporting a tubular filter member (15) in a portable channel (2) in a plate heat exchanger (1). The invention also relates to a device including the component (20) and the filter member (15). Furthermore, the invention relates to a plate heat exchanger (1), which includes a package of heat transfer plates (3) provided between a first plate (5) and a second plate (6). The filter member (15) has an inner surface and an outer surface. The component (20) includes a first part (21), which is arranged to be introduceable into the filter member (15) to abutment against the inner surface of the filter member, and a second part (22), which is arranged to abut a surface area of one of said first and second plates (5, 6), which surface area extends around the porthole channel (2).

Abstract: A condenser (14) for vehicles, comprising: a pair of mutually parallel distributors (28,30), a plurality of mutually parallel tubes (32) positioned orthogonally to the distributors (28, 30) and with their ends in fluid connection with said distributors (28, 30), in which the tubes are subdivided into a condensation section (62) and into a sub-cooling section (64), a filter body (42) having an inlet (108) in fluid connection with the condensation section (62) and an outlet (110) in fluid connection with the sub-cooling section (64).

Abstract: A heat transfer support surface for heating or cooling food articles placed adjacent the support surface by circulating a heat transfer fluid in the internal passages of the support surface is disclosed. Circulated fluid is heated or cooled by a source. Support surface contains multiple heat transfer elements arranged substantially in parallel and interconnected on both ends. Flow control tubes control the fluid flow and reduce the amount of fluid required. The method of making the support surface is also disclosed.

Abstract: An air routing device for a motor vehicle air conditioning and/or heating system, comprising an air routing housing on which a blower is arranged, wherein the air routing device is formed separately from the air routing housing and can be pushed into the air routing housing through alternate housing orifices located opposite one another.

Abstract: A liquid filter/heat exchanger unit including a liquid filter and a heat exchanger, the liquid filter having a filter element in a filter housing. To bypass the heat exchanger, there is a bypass connecting the heat exchanger inlet directly to the unfiltered side of the filter element. A switching element is provided to control the liquid flow into the heat exchanger or into the bypass. The switching element is a bimetal element which is in a position directing the liquid flow into the bypass at a temperature below a switching temperature.

Abstract: A heat transfer apparatus includes one heat exchanging system having a compressor coupled between a condenser and a heat exchanger. A further heat exchanging system includes a water pump, an ion exchange filter coupled between the water pump and the heat exchanger, to filter negative ions, positive ions, mineral materials, and/or impurities from the water. A temperature detecting member may actuate a heater to maintain the water temperature. A water cycling system includes a water reservoir to maintain the water pressure in the further heat exchanging system. An air relief valve may relieve air bubbles to reduce shocks and vibrations in the heat exchanging system.

Abstract: An agricultural machine is described with a screen for protecting a part of a cooling system of a motor mounted on the agricultural machine, the screen being mounted in its operational position adjacent the cooling system, wherein the screen is movable from the operational position next to the cooling system of the motor to a position in which the screen lies outside the envelope defining the outer form of the agricultural machine, the screen being hingedly connected to the agricultural machine so that the initial trajectory of the screen is horizontal and substantially perpendicular to the longitudinal axis of the agricultural machine, and that a further second trajectory of the screen is horizontal and substantially circular, having its centre of curvature on or adjacent a first hinge position.

Abstract: A compact air-ventilator with high efficiency thermal exchanger and air filter in which the thermal exchanger utilize a light-weight assembly of parallelly stacked thin metallic plates with pre-formed spaces. The high efficiency air filter includes a combination of filter elements including a mesh grid, an activated carbon layer and a HEPA filter. This air-ventilator can be built-in as part of an air-conditioner or as a stand alone unit to provide additional air circulating to conventional air-conditioners to improve indoor air quality. The thermal exchanger as well as the filters can be made with modular design to allow for easy periodic maintenance and replacement.

Abstract: A condenser is provided that makes a liquid droplet of a liquid phase medium drop effectively, the liquid phase medium residing in a lower end opening of a medium passage of the condenser, thereby preventing any degradation in the performance of the condenser. In the condenser, vapor, which is supplied to a cooling pipe (14) connected to cooling fins (16), is cooled, condensed into water, and recovered in a water-collecting tray (21) provided beneath the cooling pipe (14), and a needle-shaped member (24) provided so as to face the lower end opening of the cooling pipe (14) ruptures the droplet that, due to surface tension, resides in the lower end opening of the cooling pipe (14) and makes it drop into the water-collecting tray (21).

Abstract: A heat exchanger includes a pipe having an opening formed therein, and an insert positioned within the pipe. The heat exchanger also includes a cap member for sealing the opening, and a support member for resiliently supporting the insert. Specifically, the support member is positioned between the insert and the cap member.

Abstract: A cooling device includes a cooling unit (10) through which a fluid to be cooled, especially hydraulic oil, can flow and a filter unit (12) for filtering fluid. The cooling unit (10) and the filter unit (12) are joined together as one piece. The filter unit (12) is placed together with the cooling unit (10) inside a device housing (14). The cooling device can be constructed in a manner that is considerably more compact and lighter, while having an output that is comparable to that of prior art solutions.

Abstract: A large flexible plastic bib that is conical or funnel shaped with its large open end supported by a frame for positioning near a source of effluent to be collected, and the bib small open end positioned to direct liquid and debris toward a floor drain.

Abstract: In an apparatus provided with a plate type heat exchanger as a heater and/or a cooler and operated to treat a gas containing an easily blocking substance, a method for preventing the plate type heat exchanger from being blocked is disclosed which is characterized by i) setting the width of a flow path on a plate of the plate type heat exchanger in the apparatus in a range of 6-25 mm and ii) setting the average flow rate of the gas passing the plate type heat exchanger in the apparatus per unit cross-sectional area of the flow path on the plate in the range of 3-15 m/s. In the exchange of heat of an easily blocking substance by the use of a plate type heat exchanger, a method for preventing the plate type heat exchanger from blockage is disclosed which has the plate type heat exchanger provided in the port for introducing a gas containing an easily blocking substance with a gas dispersion plate.

Abstract: A flow distributor for mounting in an inlet of a heat exchanger includes a nose cone and one or more diverting rings. The nose cone is aerodynamically shaped to divert impingent gas flow around the nose cone. A first diverting ring is spaced outwardly from the nose cone and can be oriented such that at least a portion of the gas flow diverted by the nose cone is redirected into the wake of the nose cone. A second diverting ring can be spaced outwardly from the first diverting ring and can be oriented to divert gas flow impingent thereon. Struts connect the nose cone and one or more rings. Refractory on the wall of the inlet is shaped to reduce the recirculation at the outer perimeter thereof. The flow distributor is installed in the inlet with refractory to achieve substantially equal flow across the tube sheet of the heat exchanger.

Abstract: A liquid filter/heat exchanger unit including a liquid filter and a heat exchanger, the liquid filter having a filter element in a filter housing. To bypass the heat exchanger, there is a bypass connecting the heat exchanger inlet directly to the unfiltered side of the filter element. A switching element is provided to control the liquid flow into the heat exchanger or into the bypass. The switching element is a bimetal element which is in a position directing the liquid flow into the bypass at a temperature below a switching temperature.

Abstract: An oil cooler for a vehicle with an automatic transmission that includes a core contained between two end pipes. A first one of the end pipes includes an oil inlet, for directing oil from the transmission, and an oil outlet, directing oil back to the transmission, and a dividing plate having a flow control orifice. An oil filter is positioned around the flow control orifice to filter the oil flowing through the orifice, thereby removing contaminants from the oil, while the oil flowing through the core is cooled.

Abstract: The invention refers to a component (20) for supporting a tubular filter member 815) in a portable channel (2) in a plate heat exchanger (1). The invention also refers to a device including the component (20) and the filter member (15). Furthermore, the invention refers to a plate heat exchanger (1), which includes a package of heat transfer plates (3) provided between a first plate (5) and a second plate (6). The filter member (15) has an inner surface and an outer surface. The component (20) includes a first part (21), which is arranged to be introduceable into the filter member (15) to abutment against the inner surface of the filter member, and a second part (22), which is arranged to abut a surface area of one of said first and second plates (5, 6), which surface area extends around the porthole channel (2).

Abstract: A compact air-ventilator with high efficiency thermal exchanger and air filter in which the thermal exchanger utilise a light-weight assembly of parallelly stacked thin metallic plates with pre-formed spaces. The high efficiency air filter includes a combination of filter elements including a mesh grid, an activated carbon layer and a HEPA filter. This air-ventilator can be built-in as part of an air-conditioner or as a stand alone unit to provide additional air circulating to conventional air-conditioners to improve indoor air quality. The thermal exchanger as well as the filters can be made with modular design to allow for easy periodic maintenance and replacement.

Abstract: An oil cooler for a vehicle with an automatic transmission that includes a core contained between two end pipes. A first one of the end pipes includes an oil inlet, for directing oil from the transmission, and an oil outlet, directing oil back to the transmission, and a dividing plate having a flow control orifice. An oil filter is positioned around the flow control orifice to filter the oil flowing through the orifice, thereby removing contaminants from the oil, while the oil flowing through the core is cooled.

Abstract: An installation for recovering debris stopped by a filter at the inlet of a heat exchanger: a washing water manifold (36) at the outlet of the filter (11) feeds a separator (37) provided with an outlet pipe (39) for water free of debris to which is connected a hydro-ejector (50) which is connected to the outlet pipe (16) of the exchanger (19).

Abstract: A heating and/or air-conditioning system for the interior of a vehicle has an air-conveying device, a heat exchanger and an evaporator. At least one air-conveying assembly of the air-conveying device is designed as a disc fan so that the heating and/or air-conditioning system can have as compact a build as possible and so as to achieve high efficiency.

Abstract: A method and apparatus for filtering particulate matter from internal combustion engine coolant where a replaceable filter is connected between the heater core supply and return lines. A portion of the normal engine coolant flow is directed from a heater hose through a paper or media filter in order to remove particulate matter such as rust and scale. A filter assembly comprised of a housing with inlet and outlet ports may installed in a new engine or may be retrofitted to an existing engine by cutting the heater hoses, installing tees, and connecting the filter housing to the tees with short sections of hose. An alternate embodiment includes a housing that clamps directly to the heater hoses so that a portion of the flow is directed through the filter.

Abstract: A liquid filter, especially including an oil filter cartridge (12) which is contained in a pot-shaped or cylindrical housing (10) with threaded cover (11), into which a cooler (13) is preferably installed. An outlet opening (37a) is contained in the oil cooler (13) which facilitates complete emptying of the cooler when the filter is changed. In this way, a complete replacement of the oil can be performed, so that the replaced oil is not contaminated from the outset by residues of the old oil. Thus, service intervals can be lengthened. To prevent a short circuit of the outlet opening (37a) during operation, the opening is closed by a valve stem (33) coupled to the threaded cover (11) and opened by unscrewing the cover.