32results about How to "Balanced differential pressure" patented technology

The embodiment of the invention provides a differential pressure balancing method and device for a multi-split air conditioner and the multi-split air conditioner, and belongs to the technical field of air conditioners. The differential pressure balancing method comprises the following two steps that a shutdown instruction is received; and the opening degree of an electronic expansion valve of the multi-split air conditioner is controlled according to the operation condition of the multi-split air conditioner before the shutdown instruction is received, so that the differential pressure balancing speed after the multi-split air conditioner is shut down is increased. The multi-split air conditioner comprises an outdoor unit and multiple indoor units, the outdoor unit and each indoor unit are each provided with a controller and an electronic expansion valve communicating with the controller, and a differential pressure balancing device for the multi-split air conditioner is arranged in the controller of the outdoor unit or any indoor unit, which is used for controlling the multi-split air conditioner to execute the differential pressure balancing method for the multi-split air conditioner. According to the multi-split air conditioner and the differential pressure balancing method and device thereof, the pipeline structure of the multi-split air conditioner can be simplified, the production efficiency is improved, and the production cost is reduced.

The invention provides a respiratory heat dissipation structure for a hub motor. The respiratory heat dissipation structure for the hub motor comprises a hub and a waterproof breathable film component; a breathing hole and projection parts are arranged on the hub; the waterproof breathable film component is arranged within or outside the hub or within the breathing hole; the waterproof breathable film component covers a radial cross section of the breathing hole; the projection parts are arranged on the external side surface of the hub; the projection parts comprise flow guide projections; and the flow guide projections correspond to the breathing hole. According to the respiratory heat dissipation structure for the hub motor, as the flow guide projections are arranged on the external surface of the hub, a pressure difference is formed between two sides of the breathing hole so as to drive hot air within the hub to flow out; therefore, the performance of the hub motor can be furthest developed; in addition, parts within the breathing hole can also be protected to achieve double benefits.

The invention discloses a spindle sealing system for a motor working under a high-temperature or high-pressure environment, which belongs to the technical field of motor equipment. The spindle sealing system comprises a first connector and a second connector; the first connector is connected with a motor housing; the second connector is connected with a spindle, and the first connector and the second connector are connected through screw threads. The spindle sealing system is characterized in that a piston rod sleeves the spindle; the piston rod is connected with a piston; one end of the first connector is connected with a piston end cover; the other end of the first connector is connected with a first sealing element; the second connector is connected with the spindle through a second sealing element; a transitional cavity is defined by the first connector, the second connector and the spindle; an internal cavity is defined by the motor housing, the spindle and the piston end cover; the first connector is provided with a first pressure balance hole, and the piston end cover is provided with a second pressure balance hole. Because the pressure difference between sealing is balanced by the piston, the sealing can work under a zero-pressure-difference environment, consequently, the sealing reliability is improved, and the stable operation of the motor under the high-temperature or high-pressure environment can be ensured.

The invention discloses an infusion apparatus puncture joint. The infusion apparatus puncture joint comprises a base and a puncture head, and is characterized in that an air inlet channel and a liquidoutlet channel are formed in the puncture joint, wherein a one-way air inlet assembly is arranged on the air inlet channel, an air inlet of the air inlet channel is located in the base, and an air outlet of the air inlet channel is located in the puncture head; the liquid outlet channel comprises a liquid inlet section, a liquid storage cavity and a liquid outlet section; a liquid inlet of the liquid inlet section is located in the puncture head, and a liquid outlet of the liquid inlet section communicates with the liquid storage cavity; and a liquid inlet of the liquid outlet section communicates with the liquid storage cavity, and a liquid outlet of the liquid outlet section is located in the base. The infusion apparatus puncture joint has an air filtering function so as to remove air in liquid medicine entering a catheter, and meanwhile can be conveniently recycled, and the stability of inserting connection with a bottle cap of a medicine bottle is improved.

The invention discloses a shell of refrigeration equipment and the refrigeration equipment. The shell stands for a door or a box of the refrigeration equipment. The shell comprises an outer shell andan inner container connected with the outer shell. A foaming cavity is formed between the shell and the inner container. The shell further comprises a ventilation frost reduction device. The ventilation frost reduction device comprises a ventilation hood, a breather pipe and a waterproof ventilation part which are accommodated in the foaming cavity. The ventilation hood is mounted on the inner container and communicates with the inner container. The ventilation hook communicates with the outside through the breather pipe. The waterproof ventilation part is arranged on the breather pipe. The waterproof ventilation part can make external air get into the breather pipe to prevent water molecules of external air from getting into the breather pipe. After the door of the refrigeration equipmentis closed, the internal and external pressure difference of the refrigeration equipment can be quickly balanced, and the door of the refrigeration equipment can be opened easily. Moreover, the waterproof ventilation part can prevent the water molecules of external air from getting into the refrigeration equipment along with the external air, and the frost reduction effect of the refrigeration equipment is improved.

The invention provides an oil gas water well universal type positive cycle type high-efficiency inner bailing combination tool. The oil gas water well universal type positive cycle type high-efficiency inner bailing combination tool comprises a first valve body, an upper through hole is formed at the top end of the first valve body and a lower through hole is formed at the bottom end of the first valve body, and the side walls opposite to each other in the first valve body are provided with a sand-carrying fluid outlet hole which is communicated with the lower through hole and the outside, and a power fluid outlet hole which is communicated with the upper through hole and the outside; at least one rubber cup with an opening facing downward is fixed on the first valve body, and the rubber cups are arranged between the upper portion of the power fluid outlet hole and the lower portion of the sand-carrying fluid outlet hole; The oil gas water well universal type positive cycle type high-efficiency inner bailing combination tool further comprises a second valve body, an upper through hole is formed at the top end of the second valve body and a lower through hole is formed at the bottom end of the second valve body, and the side walls opposite to each other in the second valve body are provided with a sand-carrying fluid inlet hole which is communicated with the lower through hole and the outside, and a power fluid inlet hole which is communicated with the upper through hole and the outside; at least one rubber cup with an opening facing upward is fixed on the second valve body, and the rubber cups are arranged between the upper portion of the power fluid outlet hole and the lower portion of the sand-carrying fluid outlet hole.

The invention discloses a hydraulic-hydraumatic comprehensive driving axle gear box body for a high-speed railway maintaining vehicle. The hydraulic-hydraumatic comprehensive driving axle gear box body comprises a box cover, an upper box body and a lower box body, wherein a motor mounting flange base, a motor input spline shaft bearing base, an input gear shaft bearing base, a middle shaft bearing base and an output shaft bearing base are arranged on the box body; the box body is provided with an upper subdivision part and a lower subdivision part; the motor mounting flange base, the motor input spline shaft bearing base and the input gear shaft bearing base have the same first central axis; the first central axis is located on the upper subdivision part; a second central axis of the middle shaft bearing base and a third central axis of the output shaft bearing base are respectively located on the lower subdivision part and are vertical to each other; the first central axis and the second central axis of the middle shaft bearing base are parallel to each other; the first central axis is deviated from the second central axis for a distance S; the deviating direction is away from one side of a pull arm mounting base. The hydraulic-hydraumatic comprehensive driving axle gear box body has the advantages of compact structure, small volume, reasonable layout and easiness in manufacturing and maintaining.

The disclosure relates to an explosion-proof valve, a battery pack and a vehicle. The explosion-proof valve includes an explosion-proof valve body and a pressure relief structure. A first exhaust channel is formed on the explosion-proof valve body. The connected second exhaust passage, the pressure relief structure is movably connected to the explosion-proof valve body so that the first exhaust passage can selectively communicate with the inside of the battery pack casing; the air pressure inside the battery pack casing is less than the pressure threshold In the first working condition, the pressure relief structure blocks the first exhaust channel, and the inside of the battery pack casing communicates with the outside atmosphere through the second exhaust channel. Under normal circumstances, the pressure relief structure moves away from the first exhaust passage under the action of the air pressure inside the battery pack casing, so that the inside of the battery pack casing communicates with the outside atmosphere through the first exhaust passage and the second exhaust passage. , the explosion-proof valve has strong reliability and high safety factor.

The invention discloses a spindle sealing system for a motor working under a high-temperature or high-pressure environment, which belongs to the technical field of motor equipment. The spindle sealing system comprises a first connector and a second connector; the first connector is connected with a motor housing; the second connector is connected with a spindle, and the first connector and the second connector are connected through screw threads. The spindle sealing system is characterized in that a piston rod sleeves the spindle; the piston rod is connected with a piston; one end of the first connector is connected with a piston end cover; the other end of the first connector is connected with a first sealing element; the second connector is connected with the spindle through a second sealing element; a transitional cavity is defined by the first connector, the second connector and the spindle; an internal cavity is defined by the motor housing, the spindle and the piston end cover; the first connector is provided with a first pressure balance hole, and the piston end cover is provided with a second pressure balance hole. Because the pressure difference between sealing is balanced by the piston, the sealing can work under a zero-pressure-difference environment, consequently, the sealing reliability is improved, and the stable operation of the motor under the high-temperature or high-pressure environment can be ensured.

The invention relates to the technical field of radar equipment, in particular to a welded air tube secondary radar antenna box. The antenna box is formed by welding several segmented boxes in turn, and each segmented box is formed by welding two open ends of U-shaped box plates opposite each other. The antenna box in the invention is formed by tailoring and welding a plurality of sections of thebox body, and each section of the box body is also formed by splicing aluminum alloy plates, replacing the assembly mode of manual riveting, reducing the influence of human factors, and realizing batch production. At the same time, the welding installation method reduces the number of parts and the types of parts, reduces the complexity of installation and shortens the production cycle. In addition, due to the reduction of the number of parts and the types of parts, the phenomenon of wrong installation caused by the use of too many parts is avoided, and the installation accuracy is further improved. Moreover, the reduction in the number of parts reduces the weight of the box and reduces the strength requirements of the mounting base.

The invention discloses a respiration device of a dish washer and a water-tank dish washer. The respiration device of the dish washer includes a respiration device shell and a one-way valve. A drainage channel and a ventilation channel are defined in the respiration device shell, the drainage channel is provided with a sewage inlet and a sewage outlet, the ventilation channel is provided with a drainage venation opening and a respiration opening, the drainage venation opening is communicated with the drainage channel and is located between the sewage inlet and the sewage outlet, and the respiration opening is communicated with external atmosphere; the one-way valve includes a valve body and a valve element, wherein the valve body is arranged in the ventilation channel, an external connector and an internal connector are arranged on the opposite side walls of the valve body respectively, the external connector is communicated with the respiration opening, the internal connector is communicated with the drainage venation opening, the valve element is provided with a limit part and a plugging part, and the plugging part is suitable for plugging the external connector. According to therespiration device of the dish washer, the mode that motion of the valve element is adopted to open or close the respiration opening is very reliable and stable, and the service life is long.

The invention discloses a pressure control device and method in a climate laboratory aircraft engine start-up test room. The device comprises a laboratory thermal insulation wall plate, a positive pressure control mechanism and a negative pressure control mechanism. The positive pressure control mechanism and the negative pressure control mechanism both include The air flow channel and the thermal insulation sealing door assembly, the positive pressure control valve is installed in the air flow channel of the positive pressure control mechanism, and the negative pressure control valve is installed in the air flow channel of the negative pressure control mechanism; the method includes: when the aircraft engine start-up test is not carried out The operation process; the operation process before the start-up test of the aircraft engine; the working process of the positive pressure control valve and the negative pressure control valve during the engine start-up test. The invention solves the problem of excessive pressure difference inside and outside the laboratory caused by the mismatch between the compensation air flow and the exhaust emission of the engine during the driving test of the aircraft engine, and can ensure the safety of the driving test of the aircraft engine, with good sealing performance and fast response speed.

The invention discloses a spindle sealing method for a motor working under a high-temperature or high-pressure environment, which belongs to the technical field of motor equipment. The spindle sealing method is characterized in that a piston rod and a piston are first fitted between a motor housing and a spindle, and a piston end cover is fitted; a first sealing element is fitted on a first connector, and a second sealing element is fitted between a second connector and the spindle; the first connector is connected with the motor housing, the second connector is connected with the first connector, a transitional cavity is formed by the first connector, the second connector and the spindle, an internal cavity is formed by the motor housing, the spindle and the piston end cover, a first pressure balance hole is formed in the first connector, a second pressure balance hole is formed in the piston end cover, and the pressure balance between the transitional cavity and the internal cavity is regulated by means of the motion of the piston. Double sealing is adopted by the invention, the stable operation of the motor can be effectively ensured by the piston balancing the pressure difference between sealing, and the sealing method is simple and reliable.

The embodiment of the present invention provides a multi-connected air conditioner pressure difference balancing method, device and multi-connected air conditioner, which belong to the technical field of air conditioning. The multi-connected air conditioner pressure difference balancing method includes the following two steps: receiving a shutdown command; The operation status of the multi-connected air conditioner controls the opening degree of the electronic expansion valve of the multi-connected air conditioner, so as to increase the speed of differential pressure balance after the multi-connected air conditioner stops. The multi-connected air conditioner includes an outdoor unit and multiple indoor units. The outdoor unit and each indoor unit are equipped with a controller and an electronic expansion valve communicating with the controller. The controller of the outdoor unit or any indoor unit has a built-in multi-connected air conditioner pressure The differential balance device is used to control the multi-connected air conditioner to execute the two steps of the above-mentioned multi-connected air conditioner differential pressure balancing method. The multi-connected air conditioner and its pressure difference balancing method and device can simplify the pipeline structure of the multi-connected air conditioner, improve production efficiency and reduce production cost.