371results about How to "Reduce cooling efficiency" patented technology

A rack-mount server system of a liquid cooling system, in which a heat-generating component such as a CPU is cooled by a coolant has a plurality of server modules with heat-generating components which are cooled by the circulating coolant. The server modules are connected in parallel to a circulation coolant path through which the coolant to cool the server modules is circulated. In the middle of the coolant circulation path is a cooling unit that cools the coolant by radiating its heat to the outside air. Furthermore, a bypass route parallel to the server modules and going around the server modules is provided in the coolant circulation path, and the circulation quantity of the coolant is controlled in the bypass route. Alternatively, the flow quantity of the coolant is controlled in each of the server modules.

A roof top cooling unit has an evaporative cooling section that includes at least one evaporative module that pre-cools ventilation air and water; a condenser; a water reservoir and pump that captures and re-circulates water within the evaporative modules; a fan that exhausts air from the building and the evaporative modules and systems that refill and drain the water reservoir. The cooling unit also has a refrigerant section that includes a compressor, an expansion device, evaporator and condenser heat exchangers, and connecting refrigerant piping. Supply air components include a blower, an air filter, a cooling and/or heating coil to condition air for supply to the building, and optional dampers that, in designs that supply less than 100% outdoor air to the building, control the mixture of return and ventilation air.

The invention discloses a method for controlling an inverter compressor. According to the method, a target temperature and a dividing temperature point are preset, and a sensor monitors an actual temperature value. The method comprises the following steps that: a controller judges whether the difference between an actual temperature and the target temperature is zero, and the compressor operates at a minimum frequency for a certain period if the difference between an actual temperature and the target temperature is zero; the controller judges whether the target temperature is reached, and thecompressor stops operation if the target temperature is reached, or the controller initializes a PID parameter to allow an inverter to make the compressor start to raise frequency quickly if the target temperature is not reached; the controller judges whether the preset dividing temperature point is reached, and the PID parameter is adjusted if the preset dividing temperature point is reached, orthe PID parameter is kept constant if the reset dividing temperature point is not reached; and the controller judges whether the target temperature is reached, and the compressor operates at a constant frequency and the frequency inversion is finished if the target temperature is reached, or the compressor raises frequency while keeping the original PID parameter if the target temperature is not reached. Correspondingly, the invention also provides a device for controlling the inverter compressor. The method and the device can realize a quick, energy-saving and stable frequency inversion process at the same time.

Cooling system for motor vehicles with at least one radiator to which in a first operating phase, particularly in the ram pressure phase, a first air stream can be supplied via a first air flow path and which in an alternative or simultaneous second operating phase, particularly during fan operation, can be supplied by means of at least one air-conveying device, with a second air stream flowing along a second air flow path. Among other things, it is also provided that at least in some regions the two air flow paths are oriented at an angle to each other so that the air-conveying device is disposed outside or essentially outside the first air flow path. The invention also related to a corresponding method.

A high-pressure side discharge port of a two-stage compressor (12A) and a condenser (14A) are connected, condenser (14A) and a PMV (15A) are connected, a refrigerating side exit of PMV (15A) is connected to a medium pressure side suction port of two-stage compressor (12A) via an R capillary tube (16A) and an F evaporator (18A), connected to an F evaporator (26A) via an F capillary tube (24A), F evaporator (26A) is connected to a low-pressure side suction port of two-stage compressor (12A) via a low-pressure suction pipe (28A), PMV (15A) can switch a simultaneous cooling mode and a freezing mode, and in the simultaneous cooling mode, a refrigerant flow rate toward R evaporator (18A) is adjusted by PMV (15A), and thereby a temperature difference control is performed so as to make a difference between an entrance temperature and an exit temperature of R evaporator (18A) equal to a preset temperature difference (for example, 4° C.).

A controller (22), on the basis of the detection condition of a temperature sensor (23) for a freezing chamber and a temperature sensor (24) for a refrigerating chamber, controls a freezing cycle device (10). Here, controller (22) controls an opening of a regulating valve (12) so as to make a superheat amount which is a difference between an exit temperature and an entrance temperature of a refrigerating evaporator (5) equal to a target superheat amount, and thereby adjusts a refrigerant flow rate to refrigerating evaporator (5) in a limited state.

In this case, when a power is turned on, the entrance temperature and the exit temperature of refrigerating evaporator (5) are the same, so that controller (22), when the power is turned on, calibrates detected temperatures of an entrance temperature sensor (27) and an exit temperature sensor (26) so as to coincide with each other, and thereby can execute surely the subsequent limiting adjustment of regulating valve (12) on the basis of the superheat amount.

Further, in this case, when a refrigerant supply to refrigerating evaporator (5) is stopped and the temperature of refrigerating evaporator (5) rises suddenly, controller 22 increases an opening of a valve opening (42) to refrigerating evaporator (5) of regulating valve (12) to a predetermined return value, so that the refrigerant supply amount to refrigerating evaporator (5) is increased at a stretch, and thus the refrigerating evaporator can be cooled quickly.

A refrigerator having a two-stage compressor (12A) for cooling efficiently both a refrigerating chamber (2A) and a freezing chamber (5A) will be provided.

When limiting and adjusting a refrigerant flow rate to one evaporator according to an opening of a valve body so as to make a superheat amount of one evaporator appropriate on the basis of the superheat amount which is a difference between an exit temperature and an entrance temperature of one evaporator, a refrigerator for detecting accurately the entrance temperature and the exit temperature of one evaporator will be provided.

When limiting and adjusting a refrigerant flow rate to one evaporator according to an opening of a valve body, a refrigerator for causing no delay in a refrigerant supply to one evaporator will be provided.

In a cooling system having a compressor for supplying refrigerant under pressure, a condenser for condensing the refrigerant supplied from the compressor, a liquid receiver arranged to temporarily store the condensed refrigerant supplied from the condenser, an expansion valve for expanding the refrigerant supplied from the liquid receiver, and an evaporator arranged to effect evaporation of the expanded refrigerant for cooling the surrounding thereof, a bypass conduit is arranged to bypass the liquid receiver and expansion valve, and an electrically operated flow passage changeover valve is provided to selectively connect a supply passage of refrigerant to the liquid receiver and expansion valve and to the bypass conduit so that the supply passage of refrigerant is connected to the liquid receiver and expansion valve during operation at a cooling mode and is connected to the bypass conduit during operation at a defrost mode.

A battery cooling structure includes: a battery provided in a luggage room of a vehicle; an air intake duct, including an air inlet open in a vehicular cabin, for supplying air in the vehicular cabin to the battery as cooling air; and a partition panel standing away from a rear seat with a clearance therebetween so as to section the luggage room and the vehicular cabin and provided with a duct hole in which the air intake duct is inserted. The partition panel is provided with an air exhaust hole for exhausting air in the luggage room to the vehicular cabin. The air exhaust hole is formed at a location spaced away from the duct hole. Such a configuration provides a battery cooling structure suppressing an adverse effect caused by exhaust of heated cooling air.

A system for a vehicle, comprising of a diesel engine having an intake system and an exhaust system, a first EGR loop coupled between said intake system and said exhaust system and having a first valve and a first cooler located therein, a second EGR loop coupled between said intake system and said exhaust system and having a second valve and a second cooler located therein, and a control system operating the first and second valves in a first condition where both valves provide EGR flow to the engine, and at least temporarily increasing flow in the first EGR loop and decreasing flow in the second EGR loop when EGR flow is decreased to a condition where buildup in one of said coolers is increased.

A semiconductor laser device has a heat sink of which laminated plural plates are constituted and a semiconductor laser element mounted on upper surface of the heat sink. The heat sink has a channel in which a coolant flows inside thereof. The heat sink includes a channel-forming plate portion that forms the channel and a mounting plate portion that forms an upper surface of the heat sink that comes into contact with the channel. The mounting plate portion is made of material having a thermal expansion coefficient, which is nearer that of the semiconductor laser element than that of the channel-forming plate portion.

The present disclosure provides an element for emission of thermal radiation. The element comprises particles arranged for receiving thermal energy and emitting at least a portion of the received thermal energy in the form of the thermal radiation. The thermal radiation predominantly has a wavelength or wavelength range within an atmospheric window wavelength range in which the atmosphere of the Earth has a reduced average absorption and emission compared with an average absorption and emission in an adjacent wavelength range whereby absorption by the element of radiation from the atmosphere is reduced.

The invention discloses solar photovoltaic panel dust clearing equipment. The equipment comprises a mounting frame whose upper surface is obliquely arranged, wherein a photovoltaic panel is arranged at the upper end of the mounting frame, a groove is formed in the upper end of the mounting frame, a reciprocating lead screw is rotationally connected to the side wall of the groove, a sliding block is in threaded connection with the reciprocating lead screw, a transverse plate which is obliquely arranged is fixedly connected to the side wall of the sliding block, and a clearing device for clearing the surface of the photovoltaic panel is mounted on the transverse plate. According to the equipment, through arrangement of fan blades fixedly connected to the side wall of the reciprocating lead screw, the fan blades can be driven to rotate when outside air blows, so that the reciprocating lead screw drives the sliding block to reciprocate back and forth, the transverse plate is driven to perform automatic clearing on the surface of the photovoltaic panel, a stretchable airbag fixed to the sliding block and the side wall of the groove is set, so that rainwater in a water tank is extruded into a cavity when the sliding block reciprocates back and forth, and water is sprayed on the surface of the photovoltaic panel through a water outlet hole for clearing.

In a work vehicle, an engine compartment is disposed forwards of a cab. An exhaust gas treatment device is disposed over an engine in the engine compartment. A radiator is disposed forwards of the exhaust gas treatment device (33) in the engine compartment. A blower is configured to generate an airflow passing through the radiator from back to front of the radiator. The exhaust gas treatment device is slanted with respect to a vehicle width direction for increasing a distance between the exhaust gas treatment device and the radiator towards a first lateral face portion. Further, the first lateral face portion includes air inlets facing a space between the exhaust gas treatment device and the radiator.

A cooling structure, a gas turbine combustor, and a method of manufacturing the cooling structure attain a high cooling efficiency without increasing manufacturing cost. The cooling structure includes a first member as a cooling object having a first plane, and a second member arranged above the first plane and having an opposing second plane such that a passage is formed between the first plane and the second plane for a cooling medium to flow. The first member has a plurality of prominences each of which extends upwardly from the first plane, and extends to be inclined along a direction in which the cooling medium flows. A clearance between the second plane and a tip of each prominence is set such that a heat transfer rate between the cooling medium and the first member becomes larger than that when each prominence extends vertically upward from the first plane.

Brackets 3 made of resin are provided between the radiator 1 and the condenser 2, and the heat exchangers 1 and 2 are secured to the brackets 3, so that heat transfer from the radiator 1 to the condenser 2 can be restricted and reduction of the cooling efficiency of the condenser 2 can be prevented. The radiator 1 and the condenser 2 are assembled with and secured to the brackets 3 so that the position of the condenser 2 with respect to the radiator 1 can be easily determined. Therefore, the assembling of the cooling module can be facilitated and no heat exchange between the radiator 1 and the condenser 2 can be restricted due to a predetermined space provided between the core 1c of the radiator 1 and the core 2c of the condenser 2.

An electronic component cooling apparatus comprises a so-called water-cooled heat sink, a radiator to be cooled by a motor-driven fan, first and second coolant paths for circulating a coolant between the heat sink and the radiator, and a motor-driven pump for giving a moving energy to the coolant. A plurality of engaging pieces of the motor-driven fan and a plurality of engaged portion of the radiator are engaged to connect the motor-driven fan and the radiator.

A platform seal strip, in particular for use in a gas turbine blade assembly, is provided. The platform seal strip includes an upper side, a lower side, a first portion and a second portion. The width of the first portion is smaller than the width of the second portion. The first portion and the second portion are at least partially bent downwards such that the upper side includes a convex surface portion and the lower side includes a concave surface portion.

A storage management server collects, stores and displays positions, temperatures and temperature threshold values of physical storage devices from a storage apparatus. It collects, stores and displays positions and power consumptions of variable factor generation sources which are factors that cause the physical storage devices to vary in operation environments, and also calculates the influenceability by variable factor generation sources against the physical storage devices and affected temperatures thereof. It compares the temperature of a given physical storage device to a temperature threshold value of this physical storage device or compares it to an affected temperature thereof due to the variable factor generation sources, thereby moving, for data transfer, an operation position of physical storage device based on a comparison result at such time.