36results about How to "Improve cooling reliability" patented technology

The application relates to an apparatus for preparing food. The apparatus includes a housing (1), a food preparation chamber (4) in the housing (1) having an inner wall (5) defining a food receiving space (6) with an air entry aperture (10) and an air discharge aperture (13), a fan (14) for moving a flow of hot air successively through the air entry aperture (10), the food receiving space (6) and the air discharge aperture (13), and an air guide passage (7) for returning the flow of air from the air discharge aperture (13) towards the air entry aperture (10) separate from the food receiving space (6). The housing (1) comprising a cooling air channel (30) and a hot air vent (20) for exhausting the flow of hot air from the food preparation chamber (4) to outside the housing (1) with a constricted section (29) having a reduced cross-sectional area such that a venturi effect is generated in the hot air vent (20). An outlet (35) to the cooling air channel (30) communicates with the hot air vent (20) at the constricted section (29) such that a region of low pressure is formed at the outlet (35) and a flow of cooling air is drawn along the cooling air channel (30) and into the hot air vent (20).

The invention relates to a multi-unit air conditioner and the controlling method thereof, in particular to that in a multi-unit air conditioner consisting of a plurality of outdoor units which are only provided with a compressor with variable capacity for each, the required capacity of the indoor unit can drive an outdoor unit alone through a low load dealt with by an outdoor unit, while in high load, all the outdoor units work by distributing the required capacity of indoor unit evenly, thereby minimizing the damage caused by changing and unloading of the minimum running capacity; even when the outdoor temperature is very low and the required capacity of indoor units is under a certain level, the reliability can be also be raised and the noise of outdoor units can be reduced.

A gas turbine system (1) including a burner arrangement having a tubular combustion chamber (5), a turbine (6) and a transition duct (7) connecting the combustion chamber (5) and the turbine (6), wherein the transition duct (7) is provided with an axially extending cooling air channel (11). The transition duct (7) includes a plurality of axially extending cooling air channels, and wherein each cooling air channel (11) is provided with one single inlet (12) opened to the outside of the transition duct (7) and with one single outlet (12) opened to the inside of the transition duct (7).

The present invention relates to a cooling apparatus and method wherein a supply sump and turbine are below grade. Water cooled from an above grade cooling tower fan and fill flows into the supply sump and is pumped through below grade pipes into a facility. Heat rejected water from the facility then flows through below grade pipes into a below grade collector sump. A collector sump pump pumps the heat rejected water above grade into a nozzle and back into the fill to be cooled. The present invention is constructed such that water is not idle in any above grade component. Accordingly, the risk of water freezing within the above grade components is drastically reduced. Moreover, the heat rejection water can by-pass all above grade components and travel directly into the supply sump in the event of reduced load from the facility.

The invention relates generally to gas turbine engines used for electrical power generation. More specifically, embodiments of the present invention provide systems and ways for improving gas turbine engine reliability through an electric motor backup system for cooling features of the turbine section.

The invention provides an oil tank of a hydraulic machine. With the oil tank, a filtering device and a radiating device are used for removing impurities and cooling for hydraulic oil to ensure stableoperation of the hydraulic machine; the filtering work of the hydraulic oil in a first filtering cylinder and a second filtering cylinder is sequentially completed through a driving device, the cleaning work of the first filtering cylinder is completed, the working strength is greatly reduced, the continuity and the high efficiency of the filtering work of the first filtering cylinder are guaranteed, and the influence on the filtering effect caused by the residue of the filtering impurities is avoided; automation and intelligentization of the filtering device are realized by utilizing a PLC, liquid level sensors and electromagnetic valves, so that cleaning and filtering are more convenient; a main branch pipe plays a shunting role, so that the hydraulic oil is preliminarily cooled in a first radiating pipe, and the heat loss of the hydraulic oil in the first radiating pipe is accelerated by combining water cooling with air cooling; and the hydraulic oil is secondarily cooled through cooling devices, the cooling time of the hydraulic oil in inner pipes is prolonged by utilizing inner and outer spiral structures of a second radiating pipe, and the cooling reliability is greatly improved.

The invention discloses a frequency converter heat management system of an air conditioning unit, the air conditioning unit and a control method. The frequency converter heat management system specifically comprises a control unit, a temperature detection unit, a frequency converter cooling unit, first switch modules and second switch modules, and the control unit is respectively connected with the temperature detection unit, the first switch modules and the second switch modules; the inlet end of the frequency converter cooling unit is connected to a condenser in an air conditioning unit refrigerating system through the second switch modules, and the outlet end of the frequency converter cooling unit is connected to a main evaporator in the air conditioning unit refrigerating system through the first switch modules; and the temperature detection unit is used for detecting the temperature of a refrigerant in the frequency converter cooling unit and sending the temperature to the control unit, and the control unit controls the opening values of the first switch modules and the second switch modules according to the detected temperature so as to maintain the refrigerant in the frequency converter cooling unit within a preset range. According to the above scheme, the advantages of accurate temperature control, high applicability and the like are achieved.

The invention discloses a cabinet-level server cooling system, comprising a compressor, an evaporator and a condenser, wherein the compressor is connected with a condenser through an electromagnetic valve, the condenser is connected with an evaporator through an expansion valve, the evaporator is connected with an input end of the compressor through a gas-liquid separator, and a liquid reservoir is arranged between the condenser and the expansion valve. The compressor sucks the low-pressure steam from the evaporator into the compressor, and the refrigerant enters the condenser with higher pressure and temperature through the compression work of the compressor. In the condenser, the high-temperature and high-pressure refrigerant vapor condenses into low-temperature and high-pressure liquid;The refrigerant enters the evaporator and absorbs heat and vaporizes to reduce the heat generated by the server equipment after passing through the expansion valve and turning into a low temperatureand low pressure vapor-liquid mixture. Through evaporation temperature control technology and air-conditioning bypass technology, the purpose of improving the cooling reliability of the server is achieved, through the different height of the cabinet evaporator with different degrees of refrigeration, that all the servers in the cabinet temperature is the same is ensured.

The invention discloses an integrated water/oil/tar/coal slurry process nozzle with a gas film protection function. The integrated water/oil/tar/coal slurry process nozzle is of a sleeve-type structure and sequentially comprises a nozzle cooling water outer pipe, a nozzle cooling water inner pipe, an outer epoxy pipe, a gas film oxygen pipe, a coal slurry pipe and a central oxygen pipe from the outermost layer to the innermost layer; an ignition rod is arranged in the central oxygen pipe, and the length of the gas film oxygen pipe can be larger than the length of the outer epoxy pipe and can also be 1/2 smaller than the length of the outer epoxy pipe; and the ignition end of the nozzle is in a necking shape, and the outlet end close to the central oxygen pipe is provided with an ignitionrod rotational flow support for supporting the front end of the ignition rod. Through isolation of different channels, direct contact friction between water/oil/tar coal slurry and the inner wall faces of the channels can be greatly reduced, thus the protection effect is achieved, and the service life of the nozzle is greatly prolonged; and the ignition rod rotational flow support is adopted, theaxial speed of the water/oil/tar coal slurry and a central oxygen mixing medium after internal mixing is decreased, the axial speed of the mixing medium is increased, the water/oil/tar slurry and central oxygen are internally mixed more uniformly, and the atomization performance of the nozzle is improved.

The invention provides a hydraulic machine hydraulic oil cooling device. The hydraulic machine hydraulic oil cooling device is good in cooling effect and high in cooling efficiency. According to the hydraulic machine hydraulic oil cooling device, hydraulic oil is distributed through a main distribution pipe and is initially cooled in first radiating pipes; through combination of water cooling andair cooling, cooling water is introduced into cooling strips, fans are used for accelerating air flow between the first radiating pipes so as to accelerate heat loss of the hydraulic oil in the firstradiating pipes; a plurality of arc-shaped grooves formed in each cooling fin form multiple air channels, so that the air passes through the arc-shaped grooves to improve the cooling efficiency; cooling devices are used for secondary cooling of hydraulic oil, and the cooling time of the hydraulic oil in inner pipes is prolonged through internal and external thread structures of second radiating pipes; through the cooling fins, the heat exchange area is increased, and cooling water in outer pipes form turbulent flow to improve the cooling efficiency; and the second radiating pipes are arrangedin a box to form tertiary cooling, and the cooling reliability is greatly improved.

The invention provides a vertical type condensing heat exchanger and a heat exchange method thereof. The vertical type condensing heat exchanger comprises a condenser body, an in-tube cooling liquid heat exchange unit and an out-tube steam condensing heat exchange unit. The condenser body comprises a cylinder unit, a heat exchange tube bundle is arranged in the cylinder body, a first head and a second head are arranged on two sides of the cylinder unit respectively, a condensate collector is arranged between the cylinder unit and the second head, an in-tube cooling liquid cooling unit is arranged in the cylinder unit, and the out-tube steam condensing heat exchange unit is arranged on the cylinder unit. Cooling liquid is partitioned by a partition plate in the upper head to flow in two directions, namely from top to bottom and from bottom to top, and absorbs out-tube steam condensing released heat in in-tube travel, high-pressure steam returns to flow in a shell pass to wash a cooling tube transversely to achieve out-tube condensing, and condensate collected by each baffle board is subcooled in the second head, so that reliability of a heat exchange system is guaranteed.

The invention discloses a crystal growth furnace growth cavity cooling system. The system comprises a cooling pipe, the cooling pipe comprises a cooling medium containing cavity, and an area enclosed by the cooling pipe is set as a crystal growth cavity; a cooling medium inlet and a cooling medium outlet are formed in the cooling pipe, a main cooling medium feeding channel communicates with a cooling medium inlet flow path, and the cooling medium outlet communicates with a main cooling medium discharging channel flow path; the crystal growth furnace growth cavity cooling system further comprises an auxiliary cooling system and an electric control system, a medium outlet of the auxiliary cooling system communicates with the cooling medium inlet flow path, and a cooling medium outlet communicates with a medium inlet flow path of the auxiliary cooling system; and the auxiliary cooling system is controlled by the electric control system, and when media in the main cooling medium feeding channel and/or the main cooling medium discharging channel flow abnormally, the auxiliary cooling system provides cooling media for the cooling medium containing cavity. The crystal growth furnace growth cavity cooling system has the advantages of being reliable in cooling, safe to use, convenient to maintain, high in automation degree and the like.

The invention provides a self-powered internally cooled permanent magnet motor of an overturning magnetic pole speed-regulation mechanism, and belongs to the technical field of electric engineering. Control difficulty of a variable-frequency speed-regulation system during high-speed running of the permanent magnet motor is reduced by a rotary magnetic pole speed-change mode, multi-gear speed change of low speed, middle speed and high speed of a constant-frequency lower permanent magnet motor are finished, the speed-regulation range of the motor is broadened, and thus, the motor runs at high performance in a wide speed range. According to the technical scheme, the position of a pie permanent magnet is adjusted by controlling rotation of a rotating rod, multi-gear speed change of low speed,middle speed and high speed can be realized, and the control difficulty of the variable-frequency speed-regulation system during high-speed running of the motor is reduced favorably; and moreover, a self-powered tangential air-suction-radial air-guiding-axial exhaust integrated ventilating groove is formed in a rotor side, the cooling system is simple in structure, auxiliary equipment such as a fan pressure head and a cooler in a forced cooling mode is omitted, maintenance is facilitated, self-powered cooling on the rotor is realized by an automatic wind inducing mode, and temperature rising of the rotor and the permanent magnet is reduced effectively.

The invention provides a novel integral aluminum piston assembly for an internal combustion engine, and relates to the technical field of internal combustion engine pistons. The novel integral aluminum piston assembly for the internal combustion engine comprises an aluminum piston body, a connecting rod and a piston pin. According to the novel integral aluminum piston assembly for the internal combustion engine, engine oil is continuously supplied to the aluminum piston body through a connecting rod oil duct and a piston pin oil duct, then the integral aluminum piston body can be continuously cooled through oscillation of the engine oil in a cold oil cavity in the integral aluminum piston, the heat exchange efficiency is high, the cooling reliability is high, the cooling effect is good, the thermal load of the piston can be obviously reduced, the reliability of the piston is improved, and the service life of the piston is prolonged; and in addition, the engine oil can achieve forced lubrication on a piston pin hole, the piston pin and a connecting rod small-end bearing bush, the lubrication effect of the fit clearance is enhanced, and the failure risk of the piston pin hole, the piston pin and the connecting rod small-end bearing bush is reduced.