291results about How to "Reduce exhaust pressure" patented technology

PCT No. PCT/JP97/03706 Sec. 371 Date Apr. 14, 1999 Sec. 102(e) Date Apr. 14, 1999 PCT Filed Oct. 14, 1997 PCT Pub. No. WO98/16696 PCT Pub. Date Apr. 23, 1998The flush toilet has a waste receipt surface section (10) of a bowl section (1) formed continuously integrally with an inner rim wall surface section (15) of the rim portion disposed at a peripheral edge of an upper opening (13) of the bowl section (1) as a curved surface; and the inner rim wall surface section (15) of the rim portion acts as a flush water passage (16) of the bowl section. The flush water passage (16) of the bowl section is further configured such that the inner rim wall surface section (15) of the rim portion is shaped in an overhanging form inclining so as to hang over inside of the bowl section (1). The flush toilet of this configuration can be cleaned with ease and kept clean in sanitation.

The invention discloses a pressure control method of an air conditioning system. The pressure control method comprises the following steps: S1, respectively comparing detected outdoor ambient temperature and exhaust pressure of a compressor with a preset temperature range and preset pressure, judging whether to reduce the exhaust pressure or not according to comparison results, and if so, starting the step S2; S2, reducing the rotational speed of an indoor fan during refrigeration and reducing the rotational speed of an outdoor fan during heating; S3, comparing detected degree of superheat of inhaled air or exhaust pressure with preset degree of superheat or preset exhaust pressure, judging whether to withdraw from the control of reducing the exhaust pressure or not according to the comparison results, and if so, starting the step S4; S4, stopping the reduction of the rotational speed of the indoor fan during refrigeration and stopping the reduction of the rotational speed of the outdoor fan during heating. Through the adoption of the pressure control method of the air conditioning system disclosed by the invention, the exhaust pressure of the system can be controlled within a certain range; furthermore, the method is low in cost and good in effects, and cannot impact the reliability of the air conditioning system.

The invention relates to the field of heating ventilation air conditioners, in particular to an improved air treatment method and a fresh air conditioner device. The invention improves the problems of traditional fresh air treatment and air conditioners and particularly emphasizes that a plate-type air-air heat exchanger and indirect water evaporative cooling are used for recycling energy of sensible heat and latent heat in air exhaust in the fresh air treatment process of damp and hot regions in summer and condensed water is directly evaporated on an evaporator to improve the working condition of a compressor. Under the condition of quantificationally supplying outdoor fresh air, the energy efficiency ratio of the fresh air conditioner is increased, the thermal pollution, damp pollution and noise pollution of the fresh air conditioner to environments are reduced, the indoor air quality is improved, and meanwhile, the fresh air conditioner provides the manufacture, installation and using convenience for a local region all-air central air conditioner. The fresh air conditioner provided by the invention and a design and manufacture method of the fresh air conditioner are applicable throughout the year in various regions, particularly in the damp and hot regions; and the fresh air system provides controlled, comfortable and healthy air environments for indoor activity space of people and air conditioner environments for technology for processing, storage and the like.

The invention provides a control method and a control device of an air-conditioner, and an air-conditioner, wherein the air-conditioner comprises a refrigeration system, an indoor fan, and an outdoor fan; the control method of the air-conditioner comprises the following steps: when an instruction of starting the air-conditioner is received, detecting an operating mode of the air-conditioner and detecting a discharge pressure of a compressor in the refrigeration system; and controlling the indoor fan and/or the outdoor fan according to the discharge pressure and the operating mode of the air-conditioner so as to control a pressure of the refrigeration system. The technical solution of the present invention is capable of immediately controlling the indoor fan and/or the outdoor fan to ensure that the system pressure is adjusted to a non-stop pressure range upon detecting abnormal discharge pressure of the compressor; in such a manner, smooth start and reliable operation of the air-conditioner system are guaranteed, and therefore, the comfort of a user using the air-conditioner is improved.

The invention discloses an indirect air cooling method and a system with the working fluid of parallel-connected obverse and inverse refrigeration cycles. Based on the phase transition in the working fluid cooling process, a double-phase transition heat exchanger and a single-phase transition heat exchanger are respectively coupled with an obverse refrigeration cycle and an inverse refrigeration cycle which are connected in parallel; the saturated gaseous refrigerant from the phase-transition heat exchangers is compressed, boosted and then sent to an air-cooled radiator for exothermic condensation, then the condensed refrigerant enters a liquid storage tank and is decompressed through a throttle valve and sent to the phase-transition heat exchangers so as to complete the obverse refrigeration cycle; or the saturated gaseous refrigerant from the phase-transition heat exchangers is throttled and decompressed through a thermal expansion valve and then sent to the air-cooled radiator and the liquid storage tank, pressurized by a booster pump and finally sent back to the phase-transition heat exchangers so as to complete the inverse refrigeration cycle. The method and the system can be widely applied to the cooling systems of the condensers in thermal power, nuclear power and other turbine-generator units or the cooling systems of the intercoolers in petroleum, chemical and other industries to reduce energy consumption, save investments, as well as improve water-saving rate and the adaptability of the cooling system to the environment; therefore, the method and the system are provided with promotional values and can produce larger social environmental benefits and economic benefits after implementation.

A gasifying agent supply path A from an axial flow compressor 21 which boosts pressure of a gasifying agent to a gasifying furnace 2 is branched, and a gasifying agent bypass path D having an escaping pressure adjusting valve 23 is provided. The flow quantity or pressure of the gasifying agent supplied to the gasifying furnace 2 from the gasifying agent supply path A can be adjusted according to the degree of opening of the adjusting valve 23 disposed in the gasifying agent bypass path D, whereby providing a control valve in the gasifying agent supply path A is no longer necessary. Thus, pressure loss at the gasifying agent supply path A can be suppressed, and the discharge pressure of the axial flow compressor 21 can be greatly reduced.

The invention discloses a method for producing pressure oxygen by air separation. The compressed air is divided into two paths: one path of the compressed air is pressurized to enter a main heat exchanger for cooling, enter an oxygen pressurizer to exchange heat with pressure liquid oxygen to be condensed into a liquid state and enter a lower tower for rectification; and the other path of the compressed air enters the main heat exchanger for cooling and is divided into two parts, and one part of the air is expanded to be fed to an upper tower for rectification. The nitrogen obtained by the lower tower enters a condensing evaporator to be condensed into two parts, namely one part of the nitrogen serving as reflux returns to the lower tower and the other part of the nitrogen is subcooled through a subcooler and divided into two paths. One path of the nitrogen serving as liquid nitrogen is led out, and the other path of the nitrogen enters the top of the upper tower. Dirty liquid air extracted from the lower tower and the obtained liquid air are subcooled through the subcooler, enter the upper tower for rectification once again and pass through the condensing evaporator so as to form liquid oxygen. The liquid oxygen which is pressurized or subjected to liquid oxygen pump pressurization enters the oxygen pressurizer to be evaporated into pressure oxygen and reheated in the main heat exchanger for output. The method for producing the pressure oxygen has the advantages of optimized flow organization, low equipment input cost, and capacity of obviously reducing the energy consumption.

The invention discloses a system for improving the low-temperature heat source power generation capacity by using an injection pump. In order to increase the operating differential pressure between aturbine and an air cooler, an injection pump is connected in series between the turbine and the air cooler; a steam generator is additionally connected in series behind a first-level steam generator;a water side of the first-level steam generator is connected in series with a water side of a second-level steam generator; a working medium side of the first-level steam generator is connected in series with the turbine, the injection pump, the air cooler and a first working medium pump to form a closed loop; and a working medium side of the second-level steam generator is connected in series with the injection pump, the air cooler and a second working medium pump to form another closed loop. The invention reduces the backpressure of the turbine, increases the operating differential pressureand enhances the working ability. The low-temperature heat source performs secondary heat release in the second-level steam generator, and the steam after heat exchange is used as the working steam ofthe injection pump, thereby realizing the graded use of energy and improving the energy use ratio.

The present invention provides a method and apparatus for supplying process liquid s for a machine tool, which are able to reduce the consumption power and power factor of the pump 21 to a large extent in comparison with prior arts while maintaining the effects of process liquid s according to prior arts. The invention is embodied so that process liquid s such as coolant or cleaning fluid is supplied to necessary points by causing the process liquid s to flow down, which is stored in a sub tank 20 installed at a suitable height in a machine tool, by a gravity action when intermittently supplying the process liquid s such as coolant or cleaning fluid to the necessary points such as a workrest 2 and a workpiece w fixed thereon; the supplied process liquid s is collected into a main tank 19 on the other hand; and the process liquid s stored in the main tank 19 is transferred into the sub tank 20 by the pump 21.

The invention discloses a heating system modifying method for realizing combination of heat and power by a straight condensing unit. The heat system modifying method is characterized by comprising two implementation manners, consisting of an intermediate exhaust steam extraction manner and a high exhaust steam extraction manner, wherein the implementation manners comprise the following steps of: (1) the intermediate exhaust steam extraction manner: perforating a communication pipe of a turbine for communicating an intermediate-pressure cylinder with a low-pressure cylinder so as to be connected with a heating steam extraction pipe, and arranging a heating steam extraction pipe network to be connected to heat-supplied users; and (2) the high exhaust steam extraction manner: perforating a cold-section pipe in the front of an inlet of a reheater so as to be connected with the heating steam extraction pipe, or perforating a hot-section pipe at the back of an outlet of the reheater so as to be connected with the heating steam extraction pipe by taking exhausted steam of a high-pressure cylinder of the turbine as a heating source, and arranging a heating steam extraction network to be connected to the heat-supplied users, wherein the heating steam extraction pipe is provided with a steam extraction pressure regulating valve, a safety valve and a check valve. The invention provides a method for modifying a generator unit to be a heat and power combined device; and heat is supplied for the users by utilizing steam of a turboset and the advantages of environment friendliness, energy conservation and good economic benefits are achieved.

A crankshaft of an internal combustion engine has journals provided with shaft oil passages for carrying the oil to crankpins, and guide grooves having parts in which the shaft oil passages open, respectively, and opening in the cylindrical surfaces of the journals, respectively. The guide grooves has downstream end parts into which the shaft oil passages open, respectively, and extend in a circumferential direction in which the crankshaft rotates from the downstream end parts, respectively. First half bearing members of bearings are provided in their bearing surfaces with oil grooves through which the oil is supplied to the guide grooves, respectively. Each of the oil grooves are diametrically opposite to each of the guide grooves. The oil grooves have an axial width (W5) smaller than the axial width (W3) of the guide grooves. Thus oil leakage from gaps between each of the bearings and each of the journals of the crankshaft is reduced and hence an oil pump having a small capacity can be used.

The improvement system of energy efficiency for the refrigeration cycle is comprised of: an auxiliary heat exchanger unit for heat-exchanging between refrigerant liquid having high pressure and refrigerant vapor having low pressure; and a cabinet which houses a pressure support value placed at an inlet of an inner pipe of the auxiliary heat exchanger unit, and a pressure of the refrigerant liquid having high pressure condensed at the outdoor heat exchanger is decreased by the pressure support value, and a condensed pressure of the outdoor heat exchanger is maintained. The system can be used to accompany with the ordinary air cooler and heat pump etc., and a conventional refrigerator can be utilized for both heating and cooling like the heat pump, thus leading to an increase of coefficient of performance and a decrease of consumption of electric power.

The invention discloses an energy-saving cooling method and an energy-saving cooling system for reducing exhaust steam pressure of an air-cooled unit in a power plant, which are used for solving the problem that power output of the air-cooled unit is blocked in summer. According to the method, the exhaust steam pressure of the air-cooled unit is reduced by setting refrigerating equipment and adopting the following measures: (a), the working solution of a water-ring vacuum pump is cooled by chilled water prepared by the refrigerating circulating equipment through a cooler, and the temperature of the working solution is reduced to a set value; (b), the industrial desalted water is cooled by the chilled water prepared by the refrigerating circulating equipment through the cooler, one part ofthe cooled industrial desalted water is used for evaporative cooling of the outlet air of an axial flow fan of the air-cooled unit through a nozzle, and the other part of the cooled industrial desalted water enters a steam turbine exhaust pipeline; and (c), the condensed water is divided into two parts through a condensed water pump, wherein one part of the condensed water enters a steam turbine heat regenerator and is delivered to a boiler, and the other part of the condensed water is cooled by the chilled water prepared by the refrigerating circulating equipment through the cooler, enters the steam turbine exhaust pipeline and is mixed with the exhaust steam to absorb latent heat of vaporization. By the improvement, the exhaust steam pressure of the air-cooled unit in the power plant can be effectively reduced, and safe and economic operation of the unit in summer is ensured.

The invention belongs to the technical field of air separation and particularly relates to a process for making nitrogen by air separation or making nitrogen and simultaneously producing oxygen in an attached manner. The process comprises the following steps of: cooling purified air and introducing into a distillation system, wherein the distillation system at least is a secondary distillation system composed of an upper distillation tower and a lower distillation tower connected into a whole by a condensate evaporator; dividing the purified air into two paths, wherein one path is to introduce the purified air into an expander for expansion refrigeration and introducing expanded air into the middle part of the upper distillation tower, and the other path is to introduce the purified air into the lower distillation tower for distillation after the purified air is cooled to the saturation temperature; and finally obtaining a nitrogen product at the top part of the upper distillation tower. The process has the beneficial effects that an air compressor is low in exhaust pressure and low in energy consumption, so that the energy consumption requirements of a nitrogen production device by air separation are greatly reduced; the current requirements of energy conservation and emission reduction in China on high energy consuming industries are satisfied; and meanwhile, the extraction rate of the nitrogen can be up to 85-97%, and the energy consumption is 0.1-0.18 kWh/Nm3N2.

The invention discloses an air conditioner outdoor unit, an air conditioning unit and a refrigeration control method and a heating control method thereof. The air conditioner outdoor unit comprises an outdoor unit shell and a wind valve, wherein the wind valve covers an intake port of the outdoor unit shell. The air conditioner outdoor unit is provided with the wind valve for covering the intake port of the outdoor unit shell, so that the intake quantity of the outdoor unit shell can be adjusted through the wind valve, that is, the heat exchange quantity of an outdoor heat exchanger with external environment can be adjusted; and in particular, in low-temperature refrigeration and high-temperature heating of the air conditioning unit, the heat exchange quantity of the outdoor heat exchanger with the external environment is reduced, so that the low-temperature refrigeration operation stability and the high-temperature heating operation stability of the air conditioning unit are improved, and the service life of a compressor can be prolonged.

The invention discloses a power station air cooling system adopting combined refrigeration with shaft seal steam leakage of a steam turbine and continuous blow-down waste heat of a boiler. The system is characterized in that the steam turbine is communicated with a steam source, the steam turbine is connected with an electric generator, and the steam turbine is sequentially communicated with an air-cooling condenser, a condensate pump and boiler feedwater; the steam turbine is sequentially communicated with a steam leakage condenser, a steam leakage condensate pump and the boiler feedwater; boiler blow-down water is sequentially communicated with a flash tank, a deaerator, a working medium superheater and a drainage ditch; the steam leakage condenser is sequentially communicated with the working medium superheater, and a generator is communicated with the steam leakage condenser through a working medium circulating pump; the generator is sequentially communicated with a condenser, a first throttling valve and an evaporator, the evaporator is communicated with an absorber, and the generator is sequentially communicated with a second throttling valve, the absorber, a solution pump and a generator; and air is sequentially communicated with the evaporator, an induced draft fan and the air-cooling condenser. A method for predicting a heat-transfer coefficient of the air-cooling condenser is further provided.