Abstract: A heat exchanger module unit that provides heat exchange between a fluid and a heat medium by indirect heat exchange through a phase-change material disposed between movement paths of the fluid and the heat medium movement paths, includes: a multiple number of plates having a partition, which is formed with a through-hole through which the fluid and the heat medium move, are stacked with a spacing gap, through which the fluid and the heat medium move, at one side of the partition; the spacing gaps are selectively connected through a connector connecting the respective through-holes so as to form a fluid passage and a heat medium passage through which the fluid and the heat medium move independently respectively; the spacing gap, in which the phase-change material is received, is located and disposed between the spacing gaps forming the fluid passage and the heat medium passage through which the fluid and the heat medium move respectively such that heat exchange is made between the fluid and the heat medium th

Abstract: An apparatus for a fired heater is presented. The fired heater is designed with process coils inside a shell, and with a positioning of the burners for reducing the size of the fired heater. The shell has a general rectangular prismatic shape with combustion inlets for admitting combustion gases from the burners, and the process coils include at least two inlet ports and at least one outlet port.

Abstract: A hydraulic motor has a primary side and a secondary side. A hydraulic pump is to be driven by the engine to supply an operation fluid to the primary side. A bypass circuit is to connect the primary side and the secondary side. An electromagnetic valve is configured to control a flowing amount of the operation fluid in the bypass circuit to control an amount of the operation fluid supplied to the primary side. A filter is disposed in a fluid tube connected to the secondary side. A relief valve is disposed between the hydraulic pump and the primary side. A controller is to control the electromagnetic valve to drive the hydraulic motor in a case where a temperature of the operation fluid is low when the engine is started.

Abstract: The electric machine has a casing housing a stator and a rotor and containing a gas, and a dryer for the gas. The dryer is connected to the casing. The dryer includes a separation group, for separating humidity from the gas, a water accumulator, for at least temporally accumulating water discharged from the separation group, at least a detector for the water contained in the water accumulator.

Abstract: A zoned HVAC system comprises an HVAC unit including a climate control system and an air mover. In addition, the system comprises a supply air duct in fluid communication with the outlet of the HVAC unit. Further, the system comprises a return air duct in fluid communication with the inlet of the HVAC unit. Still further, the system comprises a plurality of zones positioned between the supply air duct and the return air duct. Moreover, the system comprises a bypass duct extending between the supply air duct and the return air duct. The bypass duct includes an active bypass damper having an open position, a closed position, and a plurality of partially opened positions. The system also comprises a control device configured to control the position of the bypass duct.

Abstract: A zoned HVAC system comprises an HVAC unit including a climate control system and an air mover. In addition, the system comprises a supply air duct in fluid communication with the outlet of the HVAC unit. Further, the system comprises a return air duct in fluid communication with the inlet of the HVAC unit. Still further, the system comprises a plurality of zones positioned between the supply air duct and the return air duct. Moreover, the system comprises a bypass duct extending between the supply air duct and the return air duct. The bypass duct includes an active bypass damper having an open position, a closed position, and a plurality of partially opened positions. The system also comprises a control device configured to control the position of the bypass duct.

Abstract: It is possible to realize flow rate control regardless of the scale on a load side or a piping system and to achieve energy saving. In a host control device (20) of a heat source system, a bypass valve opening command value is determined by an opening command value determination unit (22) such that a header differential pressure matches a target differential pressure value, and a target opening value according to the header differential pressure or the behavior of the bypass valve opening is set by a target opening value setting unit (24). A heating medium flow rate set value is determined by a heating medium flow rate setting unit (23) using the target opening value set by the target opening value setting unit (24) and the opening command value determined by the opening command value determination unit (22).

Abstract: An exhaust-gas cooler for a motor vehicle is provided that includes a flow path which can be traversed by exhaust gas of an internal combustion engine and which has an inlet region and an outlet region for the exhaust gas, a housing which surrounds the flow path and which has at least one inlet and at least one outlet for a liquid coolant of a coolant circuit, wherein the coolant can flow around the flow path in order to cool the exhaust gas, and wherein the coolant circuit is formed as a main cooling circuit of the internal combustion engine of the motor vehicle, wherein the exhaust-gas cooler is arranged in the main cooling circuit in series with the internal combustion engine.

Abstract: An insert snaps into position in a manifold of a fluid device to perform a baffling function. The insert includes a cradle having a base portion and opposed spring fingers for retaining the insert in position. The base portion can be completely closed to prevent flow through the insert, or have a spring flapper valve or bimetallic flapper valve to permit partial or full flow through the insert under predetermined conditions.

Abstract: An exhaust gas heat exchanger system of a combustion engine has a bypass duct and a heat exchanger duct with a heat exchanger. A valve is controlled by determining when heat is to be transferred from exhaust gas flowing through the exhaust system to the heat exchanger. When heat is to be transferred, the valve is switched into a first position in which all of the exhaust gas flows through the heat exchanger duct. A pressure drop across the heat exchanger system is monitored either directly or indirectly. If the pressure drop reaches a predefined limit, the valve is switched into an intermediate position, resulting in a smaller portion of the exhaust gas flowing through the heat exchanger duct than when the valve is in the first position and a remaining portion flowing through the bypass duct, thereby reducing the pressure drop across the heat exchanger system.

Abstract: A rivet-type flapper valve assembly for a fluid device has a main body part defining a valve orifice communicating with the fluid device. The main body part includes a pin or shaft of a rivet spaced adjacent to the valve orifice. The main body part is permanently attached to the fluid device, such as by brazing. A flapper valve is then mounted on the rivet shaft to cover the valve orifice, and the rivet shaft is deformed to retain the flapper valve in place.

Abstract: Disclosed is a bypass valve assembly for a fluid device, such as a heat exchanger having an inlet and an outlet. The assembly defines a bypass passage communicating with the inlet at one end. A tubular structure communicates with the outlet and has a bypass aperture in a sidewall thereof which communicates with the other end of the bypass passage. A semi-cylindrical spring flapper is fitted in the tubular structure and opens to allow bypass flow when the pressure in the bypass passage exceeds a predetermined limit.

Abstract: A flapper valve assembly attaches to a fluid device, such as a heat exchanger and has a fluid port in communication with the fluid device to provide by-pass flow in cold flow or pressure spike conditions. The flapper valve assembly includes a shim plate and a face plate that together define a slot therebetween. A spring flapper slides into the slot and is retained therein and intermittently blocks flow through the fluid port to provide the by-pass flow when required.

Abstract: An exhaust gas heat exchanger system of a combustion engine has a bypass duct and a heat exchanger duct with a heat exchanger. A valve is controlled by determining when heat is to be transferred from exhaust gas flowing through the exhaust system to the heat exchanger. When heat is to be transferred, the valve is switched into a first position in which all of the exhaust gas flows through the heat exchanger duct. A pressure drop across the heat exchanger system is monitored either directly or indirectly. If the pressure drop reaches a predefined limit, the valve is switched into an intermediate position, resulting in a smaller portion of the exhaust gas flowing through the heat exchanger duct than when the valve is in the first position and a remaining portion flowing through the bypass duct, thereby reducing the pressure drop across the heat exchanger system.

Abstract: A flapper valve assembly has a valve plate for attachment to a fluid device, such as a heat exchanger. The valve plate has a fluid port for permitting intermittent flow to or from a flow chamber in the fluid device. A resilient flapper covers the fluid port and has at least one transverse tab with resilient, laterally disposed tangs, so that the tabs snap into slots in the valve plate to prevent rotation of the flapper.

Abstract: An insert snaps into position in a manifold of a fluid device to perform a baffling function. The insert includes a cradle having a base portion and opposed spring fingers for retaining the insert in position. The base portion can be completely closed to prevent flow through the insert, or have a spring flapper valve or bimetallic flapper valve to permit partial or full flow through the insert under predetermined conditions.

Abstract: A heat exchanger including a suction line for gaseous or two phase refrigerant output from an evaporator and a capillary tube carrying cooled refrigerant to the evaporator. The suction line includes first and second substantially parallel straight cylindrical portions connected in series, with first and second portions of the capillary tube in series and helically wound around the suction line second and first portions, respectively. A valve for bypassing the capillary tube is responsive to a selected pressure differential between the capillary tube inlet and outlet. A U-shaped portion or accumulator connect the suction line first and second portions. An accumulator alternately is between the evaporator and the suction line portion wound by the capillary tube, with a phase separation chamber connected to an accumulator by a vertical pipe. The accumulator includes a discharge opening to return the oil to the system.

Abstract: A flapper valve snaps into position in an inlet or outlet manifold of a heat exchanger to provide by-pass flow in cold flow or pressure spike conditions. The flapper valve includes a cradle having opposed spring fingers for retaining the valve in position. The cradle has a fluid port therein, and a spring flapper is attached to the cradle to cover the fluid port to control the by-pass flow therethrough.

Abstract: An exhaust-gas heat recovery appliance having a heat-exchanger line and a bypass line and a heat exchanger being arranged in the region of the heat-exchanger line. At least one valve device, for the purpose of influencing the mass flow of exhaust gas, is provided in the heat-exchanger line and the bypass line. Further, at least the heat-exchanger line has a slope in the direction of flow of the exhaust gas in the installed position.

Abstract: The present invention provides a cooling system of fuel cell, which solves the gas biting noise problem by trapping bubble in a coolant, gives protection to a stack (MEA) and the membrane of a humidifier by regulating the coolant pressure of fuel cell and improves the life of a ion exchanger by preventing foreign materials (carbonate ion etc.) from dissolving into the coolant.

Abstract: An exhaust-gas heat recovery appliance having a heat-exchanger line and a bypass line and a heat exchanger being arranged in the region of the heat-exchanger line. At least one valve device, for the purpose of influencing the mass flow of exhaust gas, is provided in the heat-exchanger line and the bypass line. Further, at least the heat-exchanger line has a slope in the direction of flow of the exhaust gas in the installed position.

Abstract: A three-way heating system valve having a bypass valve between a heat source supply port and heat exchanger supply and heat source return ports for proportioning flow through the heat exchanger supply and heat source return ports, and including a differential pressure determining device between the heat exchanger supply and return ports. The pressure determining device may be a pressure relief valve and/or a pressure indicator.

Abstract: A transmission fluid cooling system includes a cooler-bypass unit having a banjo bolt relief valve. The banjo bolt relief valve includes a head portion and a body portion. A relief valve is incorporated into the body portion. A valve seat is formed between the head portion and body portion. A ball is biased against the valve seat toward the head portion by a spring within the body portion. When the transmission fluid is cool and viscous, pressure buildup in the head portion overcomes the spring bias of the ball against the valve seat, permitting the flow of transmission fluid through the cooler-bypass unit, bypassing the transmission fluid cooling unit.

Abstract: An aftercooler for cooling a compressed fluid exiting from a compressor, the aftercooler including a radiator unit for receiving the compressed fluid exiting from the compressor and for cooling the compressed fluid, the radiator unit having an inlet for receiving the compressed fluid, an outlet for discharging the compressed fluid and a plurality of heat exchange passageways connecting the inlet and the outlet for transferring heat from the compressed fluid. The aftercooler also includes a bypass channel for bypassing the plurality of heat exchange passageways which extends from a first point substantially adjacent the inlet of the radiator unit to a second point substantially adjacent the outlet of the radiator unit.

Abstract: An air handling system for heating, ventilating and air-conditioning systems to provide a variable air flow between an air treatment section and an air bypass section includes selectively sliding panels to vary the air flow between the air treatment section and the bypass section. Positioning of the panels can direct the flow of incoming air to be conditioned from all incoming air flowing through the air treatment section to all incoming air flowing through the bypass section and a mixture of incoming air flowing through the air treatment section and the bypass section.

Abstract: Disclosed is a heat exchange tube having angled heat-exchange performance-improving indentations on the tube. These angled performance-improving indentations increase the amount of heat transferred to a heat exchange liquid flowing through the tubes without substantially increasing the pressure drop or reducing the flow rate of the heat exchange liquid through the tube. An array of tubes can be made using heat exchange tubes of this invention, and a heat exchanger can be formed from an array or from tubes of this invention. In certain preferred embodiments, heat exchangers of this invention are particularly well-suited for use in solar-heating swimming-pool water or for use in thermal energy storage units.

Abstract: An installation of a pressure control valve provided for cold start in disk-type oil coolers is disclosed. The valve is provided with a valve housing which can be fitted directly into a connection opening between an inlet chamber and a hollow space through which the oil flows. The valve housing is utilized to accommodate a pressure spring which is arranged coaxially and acts upon the valve shutter. The valve housing is provided in the area of the connection opening with at least one desired buckling point such that, when the end of the valve housing impacts on a resistance, the wall of the valve housing will permanently deform to the outside and secure the valve in the connection opening.

Abstract: An aftercooler apparatus condenses vapor in untreated gas discharged from a compressor of a gas drying system. The apparatus includes a radiator, a bypass line and a bypass valve. The radiator features a first inlet, a second inlet and an outlet. The first inlet connects to the compressor from which it receives the untreated gas. The outlet connects to the next component in the gas drying system. The radiator condenses the vapor suspended in the untreated gas and passes aftercooled gas resulting therefrom via its outlet to the next component. The bypass line, through which the untreated gas may flow, connects at one end between the compressor and the first inlet and at another end to the second inlet. The bypass valve senses the difference in pressure between the first inlet and the outlet. The bypass valve also controls the flow of the untreated gas in response to the difference in pressure.

Abstract: A cooler bypass valve, located in a hydraulic circuit between the discharge side of a torque converter and lubrication circuit, includes a valve spool urged by feedback pressure acting in opposition to the force of a compression spring to a bypass cooling mode position where the converter discharge fluid flow is connected to the lubrication circuit bypassing the oil cooler. The bypass valve includes a viscosity-sensitive pressure divider, which includes a series arrangement of a laminar orifice and a sharp-edged orifice located between the converter discharge and an oil sump. As oil temperature increases, flow through the laminar orifice produces a control pressure in opposition to the feedback pressure and additive to a spring force, which combine to move the valve spool to a cooling mode position where substantially all of the converter discharge is directed through the oil cooler.

Abstract: A heat exchanger, in particular an oil cooler for internal combustion engines, composed of several parallel tubes (19) for the heat exchange medium and of lamellar, plate-like heat exchange elements (10) arranged perpendicular to the tubes and fixed thereto. The heat exchange elements (10) are bent at their outer edges (11) and are nested on top of each other. An adapter element (13) is provided for supplying the medium to be cooled. The adapter element (13) has liquid inlet (15), a liquid outlet (18) and a mounting member (14) for the heat exchanger.

Abstract: The invention relates to a method of controlling the flow-rate distribution in the coolant circuit for motor vehicles and, further, to an apparatus for carrying out this method. A throttling member actuated by differential pressure converts the pressure drop into a throttling action.

Abstract: First and second communicating holes are formed in a first formed plate 11, and first and second communicating holes are also formed in a second formed plate 12. The first and second formed plates 11 and 12 are joined to each other to form a joined body 8. When a plurality of joined bodies 8 are stacked, a heat exchanging section 7 is formed that is provided with a plurality of flow pipes 34 in which the first communicating holes are connected with each other in the stacking direction and the second communicating holes are also connected with each other. In the plurality of flow pipes 34 of the heat exchanging section 7, oil passage 35 in which engine oil flows in the stacking direction is formed, and further around the plurality of flow pipes 34, a plurality of cooling water passages 36 in which engine cooling water flows are formed.

Abstract: A cooler bypass valve, located in a hydraulic circuit between the discharge side of a torque converter and lubrication circuit, includes a valve spool urged by feedback pressure acting in opposition to the force of a compression spring to a bypass cooling mode position where the converter discharge fluid flow is connected to the lubrication circuit bypassing the oil cooler. The bypass valve includes a viscosity-sensitive pressure divider, which includes a series arrangement of a laminar orifice and a sharp-edged orifice located between the converter discharge and an oil sump. As oil temperature increases, flow through the laminar orifice produces a control pressure in opposition to the feedback pressure and additive to a spring force, which combine to move the valve spool to a cooling mode position where substantially all of the converter discharge is directed through the oil cooler.

Abstract: According to the present invention, a hot water type heating apparatus includes a heat exchanger and a flow quantity control valve which controls a quantity of hot water to the heat exchanger. The flow quantity control valve includes a valve housing provided with a first inlet pipe to which the hot water flows, a first outlet pipe which returns hot water to an engine, a second outlet pipe which directs the hot water to the heat exchanger, a second inlet pipe to which the hot water from the heat exchanger flows and a bypass circuit which selectively connects the hot water from the first inlet pipe directly with the first outlet pipe, and a valve body for adjusting an opening area between the first inlet pipe and the second outlet pipe. The first inlet pipe and the first outlet pipe extend from a passenger compartment of a vehicle to an engine room thereof, thereby simplifying the work for connecting these pipes.