30results about How to "Stable pressure balance" patented technology

The invention relates to an air conditioner for vehicles and ships at an ultra-low temperature environment. An indoor unit is sequentially connected with a refrigeration compressor, an air-cooled condenser, a liquid accumulator, a drying and filtering device and an expansion valve of an outdoor unit; the air-cooled condenser is formed by combining more than two condensers in parallel; electromagnetic valves are arranged at the inlets of any one condenser or all the condensers; one-way valves are arranged at the outlets of any one condenser or all the condensers; a cooling fan is controlled by and connected with a variable frequency motor; and the electromagnetic valves and the variable frequency motor are connected with an electric control cabinet. The number of the condensers participating in cooling of the air-cooled condenser can be adjusted through the combined action of the electromagnetic valves and one-way valves, and the cooling fan is adjusted through the coordination of the variable frequency motor so that corresponding air cooling in an adjustable air cooling area is satisfied so as to meet the cooling requirements for the variation of different outer environments and inner environments in which the vehicles and ships are positioned, the refrigeration use in a global environment can be satisfied, and the usable range of the air conditioner is wide.

The invention discloses a device for alternately switching a part of an evaporator into a condenser to defrost in due time. The device for alternately switching the part of the evaporator into the condenser to defrost in due time comprises a compressor, a gas-liquid segregator, a four-way reversing valve, a condenser, a liquid storing device, a filter, an expansion valve, a liquid separator, original evaporator bodies, standby evaporator bodies, defrosting sensors, three-way reversing valves and electromagnetic valves. The original evaporator bodies are in parallel connection with the standby evaporator bodies. The defrosting sensors are arranged on the original evaporator bodies and the standby evaporator bodies, the upper ends of the standby evaporator bodies are in series connection with the electromagnetic valves, and the two ends of each evaporator body are connected with the corresponding three-way reversing valves correspondingly, the upper ends of all the evaporator bodies are connected with the compressor, the gas-liquid segregator, the four-way reversing valve and the upper end of the condenser. The lower ends of all the evaporator bodies are connected with the liquid storing device, the filter, the expansion valve, liquid separator and the lower end of the condenser. According to the device for alternately switching the part of the evaporator into the condenser defrosting in due time, defrosting efficiency is high, it is not needed to absorb heat in a heat preservation water storing tank and air for defrosting, and energy consumption is low.

The invention relates to an air conditioner used for cars and ships in ultralow temperature environment and a controlling method thereof. The air conditioner is characterized in that an indoor machine is successively connected with a refrigeration compressor of an outdoor machine, an air cooling condenser, a reservoir, a dry filter and an expansion valve, wherein the air cooling condenser is composed of two or more condensers through assembling in a parallel manner, electromagnetic valves are arranged on any inlet or all the inlets of the condenser, and one-way valves are arranged on any outlet or all the outlets of the condenser; and the cooling fan is controlled by and connected with a frequency conversion motor, and the electromagnetic valves and the frequency conversion motor are all connected with an electric control box. By the combined action between the electromagnetic valves and the one-way valves, the number of condensers which perform actions in cooling in the air cooling condenser can be adjusted, the frequency conversion motor is cooperated to adjust the cooling fan, the corresponding air cooling of the adjustable air cooling area is met, the cooling requirement of different external environment and internal environment transformations of the cars and ships are adapted, the air conditioner can be used for refrigerating under global environment, and the application range is wide.

The invention discloses mucilage production equipment and a mucilage production method. The mucilage production equipment comprises a base, a gluing box, a vibration emulsification structure, an air inlet heating structure and a pressure relief structure, the gluing box is installed on the top side of the base, the vibration emulsification structure is installed in the gluing box, and the air inlet heating structure is installed at the bottom of the gluing box; the pressure relief structure is installed at the top of the gluing box, through the vibration emulsification structure, in the rotating process, a vibration motor works, a rotating disc is driven to rotate, a steel wire rope is pulled under cooperation of a positioning rod, vertical reciprocating motion of an insertion rod in a rodhole is achieved, vibration emulsification of mucilage is achieved under cooperation of a vibration rod, and stirring and vibration can be conducted at the same time, the emulsifying efficiency is greatly improved, meanwhile, stirring dead angles are avoided, it is guaranteed that mucilage is emulsified evenly, through air heating, it can be guaranteed that heat has a larger contact surface withthe mucilage, the heat exchange process is achieved more quickly, the heating effect of the mucilage is improved, and the mixing quality of the mucilage is improved.

The invention provides freeze-thaw test equipment for simulating an ultralow temperature-large temperature difference freeze-thaw process of concrete, and relates to the technical field of freeze-thaw tests. The freeze-thaw test equipment for simulating the ultralow temperature-large temperature difference freeze-thaw process of concrete comprises a test cabin, a refrigeration compressor and a nitrogen supply device. The test cabin is used for placing a target piece for a freeze thawing test, and the refrigeration compressor is configured to reduce the temperature in the test chamber. The nitrogen supply device is configured to provide liquid nitrogen into the test chamber so as to reduce the temperature in the test chamber. The freezing and thawing test equipment for simulating the ultralow temperature-large temperature difference freezing and thawing process of concrete is provided with two cooling devices, namely the refrigeration compressor and the nitrogen supply device, and the refrigeration compressor and the nitrogen supply device are different in cooling capacity, so that different environment temperatures can be simulated, the simulated environment is closer to the actual engineering environment of a target piece; and therefore, the accuracy of the thermal performance test of the target piece is improved.

The invention discloses a novel double-vertical-pipe water discharging system, and belongs to the technical field of a building indoor water discharging system. Through a water vapor separation module, water and gas in a water discharging transverse support pipe are respectively communicated with a water discharging vertical pipe and a ventilation vertical pipe, so that a water seal device communicated with the water discharging transverse branch pipe cannot be influenced by the gas pressure fluctuation of the water discharging vertical pipe; a water vapor separation and gas circulation waterdischarging system is formed; the circulation supplementation of gas in the water discharging vertical pipe is favorably realized; the gas pressure balance in the water discharging vertical pipe is stabilized; the smooth discharging of water flow in the water discharge vertical pipe is ensured; the water discharging capability is improved; the ventilation process and realization path of a conventional H type communication double-vertical-pipe water discharging system are fundamentally changed; the problems that the water discharging transverse pipe and the water discharging vertical pipe are communicated in a sealed way, the indirect communication mode of the water discharging vertical pipe and the ventilation pipe H connecting pipe is used, so that the odor returns from a floor drain canbe solved; meanwhile, the technical problem that the ventilation pipe or the annular ventilation pipe of the existing device is singly communicated with the ventilation vertical pipe, so that the surface mounting is needed is also solved.

The invention relates to the technical field of collecting and measuring the moisture content of the pore air in a plurality of surface types of soil, and discloses a soil pore air water acquiring device, comprising a first acquiring probe, a second acquiring probe, a first switching component, a water collector, an air sucking pump, an air supply pump, a dryer, a mast and a sealing cover having an opening, wherein the two acquiring probes are disposed in the mast; the first acquiring probe comprises a first outlet and a first inlet; the second acquiring probe includes a second inlet, a secondoutlet, and a third outlet; the first switching component controls the second outlet or the third outlet to be separately connected to the second inlet; the mast is inserted into the sealing cover; the dryer is connected to the second inlet and the air supply pump; the water collector is connected to the first outlet and the air sucking pump; the first inlet and the second outlet penetrate through the mast and are located inside the sealing cover; and the third outlet penetrates through the top of the mast. The soil pore air water acquiring device of the invention is convenient to be used inwild cold or dry environment.

The invention discloses a method for automatically controlling a dry red mud filter press system, comprising the following steps: enabling the pressure of a red mud feeding system for a filter press to be balanced and stable by adopting the variable-frequency adjustment, reducing the rotating speed of a motor at variable frequency in the time interval between the ending of one red mud feeding period and the starting of the next red mud feeding period to make the motor run without stop; reducing the frequency of starting and stopping high-capacity electrical equipment; arranging an electrical switching valve and an electrical adjusting vale, and connecting the high-low red mud positions of a red mud feeding slot with a red mud feeding pump; making the red mud circulate internally and the high-capacity electrical equipment run without stop when the filter press running wrong; and arranging an upper unit state displaying device to display and store the running, failing and alarming information of the dry red mud filter press system. In the invention, the peripheral equipment and the filter press are integrated into a whole control system by considering the whole situation of the control system, thus the working efficiency of the filter press is improved, the automatic balancing capacity of the dry red mud filter press system is improved, the pressure of the red mud feeding system is made to be balanced and stable, and the maintenance load of the filter press is greatly reduced.

The invention discloses a combined oil cylinder anti-explosion valve assembly. The combined oil cylinder anti-explosion valve assembly comprises two oil paths; and each oil path comprises an oil cylinder, an explosion-proof valve, a plate-type ball valve, a pressure measuring joint, a pressure gauge, a pressure gauge switch, an overflow valve, a ball valve, a one-way valve, an explosion-proof valve, a plate ball valve, a pressure measuring joint, a pressure gauge, a pressure gauge switch, an overflow valve, a ball valve and a one-way valve, wherein the anti-explosion valve set is arranged on the cylinder side valve block. Under the normal condition, oil can quickly pass through the explosion-proof valve bank, and meanwhile, the pressure gauge of the cylinder side valve block monitors the oil way pressure in real time, so that a good preventive effect can be achieved for the emergency situation; the internal pressure can be adjusted in the maintenance process, so that the internal pressure and the pressure difference of the system under the normal working state are achieved; and meanwhile, when an oil cylinder breaks down, the ball valve and the one-way valve can provide safety guarantee for overhauling, the overflow valve in the assembly can also play a good pressure maintaining effect, the oil cylinder can run stably, and the service life of the oil cylinder is guaranteed.