35results about How to "Normal open" patented technology

The invention discloses a refrigeration device of a triple generation system. The refrigeration device comprises an absorption type refrigeration unit, an electric refrigeration unit and a cold storage tank. An absorption type refrigeration unit water inlet selectively communicates with an air conditioner water return port, and an absorption type refrigeration unit water outlet selectively communicates with an air conditioner water supply port. An electric refrigeration unit water inlet selectively communicates with the air conditioner water return port, and an electric refrigeration unit water outlet selectively communicates with the air conditioner water supply port. A first opening of the cold storage tank selectively communicates with the electric refrigeration unit water inlet, the absorption type refrigeration unit water outlet or the absorption type refrigeration unit water inlet. A second opening of the cold storage tank selectively communicates with the electric refrigeration unit water outlet, the air conditioner water supply port or the absorption type refrigeration unit water outlet. According to the refrigeration device, in the process of switchover from refrigeration of the electric refrigeration unit to refrigeration of the absorption type refrigeration unit, freezing water reaching the rated water outlet temperature can be provided, and it can be ensured that the absorption type refrigeration unit has enough circulation water flow so that the absorption type refrigeration unit can be normally started.

A bilaterally rotatable end surface mechanical sealing structure with dovetail grooves comprises two mechanical sealing rings including a movable ring and a fixed ring. A plurality of bilaterally rotatable dovetail grooves are arranged on end surfaces of at least one of the movable ring and the fixed ring and are circumferentially distributed along the end surfaces of the movable ring or the fixed ring, each dovetail groove comprises a pair of spiral grooves and an arc groove, the spiral grooves of each dovetail groove are reverse to each other, roots of the spiral grooves of each dovetail groove are connected with each other by the corresponding arc groove, so that each profiled groove with the shape similar to a dovetail is formed, each spiral groove is positioned on a high-pressure side, namely the upstream, each arc groove is positioned on a low-pressure side, namely the downstream, and directions of spiral angles of the spiral grooves which are reverse to one another correspondingly are opposite to one another.

A downlink level shifting circuit includes a high side input network, a common gate voltage-withstanding structure and a low side latch circuit; the high side input network consists of two parallel PMOS devices of a common source structure, and transmits an input signal to the common gate voltage-withstanding structure; the common gate voltage-withstanding circuit includes a pair of common gate PMOS transistors, a pair of common gate NMOS transistors and two clamp diodes; and the low side latch circuit includes two pairs of NMOS transistors used as linear resistors and a latch structure formedby a pair of cross-coupled NMOS devices, and enables a high-side signal to be transmitted to a low-voltage region when a high-side voltage difference is very small.

The invention discloses a fast downlink level shift circuit with low working voltage. An MOS tube is used as a linear resistor to replace a simple resistor in the 20181084311 application, and two paths of feedback loops composed of PMOS tubes are adopted. When a PMOS tube needs to output a low level, a branch for outputting a low-side low level VSS is conducted; the transmission process of reducing the output level to the low level is accelerated, the transmission delay caused by increasing the resistance is reduced, the delay of the level shift circuit is effectively reduced, the problem thatthe signal is too lagged is solved, and the downlink level shift circuit can work quickly. The HVIC protection module can be applied to the signal conversion process from a high side level to a low side level in an HVIC, more complete transmission of various protection signals can be ensured in a larger working voltage range, and the HVIC protection module can better adapt to different working environments at a higher working speed, so that an HVIC circuit is better protected, and the protection efficiency of the protection module is improved.

The invention discloses an intelligent door lock control system and control method. The control system comprises a door lock control assembly and an intelligent key assembly; the door lock control assembly comprises an induction device for collecting triggering signals, a low-frequency door receiving-transmitting module, a high-frequency door receiving module and a door control module; the intelligent key assembly comprises a low-frequency key receiving module, an analog signal processing module, a high-frequency key transmitting module, a power supply module and a key control module; the low-frequency door receiving-transmitting module and the low-frequency key receiving module achieves judgment of a position of the intelligent key assembly through interaction of low-frequency signals; the high-frequency door receiving module and the high-frequency key transmitting module achieves information confirmation of the intelligent key assembly through high-frequency signals. According to the intelligent door lock control system and control method, the control system has the advantages of simple structure, low cost, good reliability and high security coefficient, and the control method is convenient to operate and is suitable for a wide range of promotion and application.

The invention relates to a fireproof lockset, in particular to the fireproof airtight protection structure of the fireproof lockset that is used for the fireproof door, the theftproof door and the door which has the dual fireproof and theftproof function. The invention comprises a bolt, a tapered ned, a tumbler and a lock case which is punched with a mounting hole; two fireproof seal boxes are arranged at both sides of the lock case, a graphite material that is for fireproof sealing purpose is filled inside the fireproof seal box, two heat-insulating adjustment pads which are made of asbestos sheet are arranged at both sides of the graphite material, an aluminum silicate needled wool is filled at the bottom of the lock case and an aluminum silicate wool is filled between the outsides of the lock case and the fireproof seal box and the door. When the temperature is higher than 300 DEG C in fire, the graphite material in the fireproof seal box starts to expand, which fills the clearance between the cylinder of the lockset, the tumbler, a mounting lever and other parts and the lock case, the external heat and smoke cannot enter the inside of the lock case, and thus, the fireproof and heat-insulating and smokeproof effect of a fireproof lock is realized, which guarantees that the fireproof lock is not damaged in fire and can be unlocked normally.

The invention discloses a method and a device for detecting figure infra-acoustic frequency signals. The method comprises: A. signals in an infra-acoustic frequency segment can be acquired form received signals; B. the signals in the infra-acoustic frequency segment can be in hard decision to obtain an objective sequence; C. the obtained objective sequence and a preinstalled figure infra-acoustic frequency sequence can be compared; D. when the objective sequence and the preinstalled figure infra-acoustic frequency sequence are identical and different in digits to satisfy a setting scope, the figure infra-acoustic frequency signals are ensured to be detected. In a detective process, the setting scope is used and a gray coding process can be omitted so as to effectively reduce calculated amount and simply the detective process. Furthermore, polarity of signals of a sending side and a receiving side can be taken into consideration. Therefore, the method and the device for detecting figure infra-acoustic frequency signals can be applied to rapidly and accurately to detect the figure infra-acoustic frequency signals so that a squelch circuit can be normally guaranteed to be opened and closed.

The invention relates to the field of elevators, in particular to an elevator provided with a sub-control system for detecting the running state of the elevator. An elevator safety control system comprises an elevator main control system, an elevator door gear, a driving gear providing power for the elevator door gear, an elevator guide rail, an elevator input port, a sub-control system, a torsion limiting device installed on the elevator door gear, and locking devices arranged on the two sides of the elevator guide rails and close to each layer of elevator door. By adopting the independent sub-control system in parallel with the main control system, the elevator can be monitored in real time during running, and the safety of the elevator is improved.

The invention provides a car lamp turning on control strategy for inhibiting instantaneous surge current based on ambient temperature, and relates to a car lamp turning on control method. Through the method, the problem of the existing car lamp turning on control method that as the ambient temperature is not considered, the turning on of the car lamp is limited is solved. The method comprises the steps of: according to the using ambient temperature, the interval between the former turning off and the current turning on time of the lamp filament, judging the resistance of the lamp filament; and by controlling conducting time of an FET (field effect transistor) power tube, controlling current of the car lamp, and reducing the instantaneous surge current, thereby controlling the turning on of the car lamp. The strategy is suitable for controlling the turning on of the car lamp.

The invention discloses a phosphogypsum building block autoclaving system. The system comprises a control system and a preheating room arranged on a transferring table. Third guide rails are located in the preheating room. A plurality of openings corresponding to the third guide rails are formed in the preheating room, and an electric roller shutter is installed above each opening. One side of each autoclaving kettle is provided with a steam main pipe, each steam main pipe communicates with the corresponding autoclaving kettle through a plurality of steam branch pipes, an exhaust main pipe isarranged on one side of the preheating room, and one end of the exhaust main pipe communicates with the preheating room through a plurality of exhaust branch pipes. The control system comprises a PLCand a temperature sensor arranged on the preheating room, the temperature sensor transmits monitored signals to the PLC, and the PLC controls an exhaust fan, first electromagnetic valves, second electromagnetic valves and the electric roller shutters. The system is used for solving the problems of steam waste, high production cost and energy waste of an existing phosphogypsum building block autoclaving kettle.

The invention discloses an air conditioner. The air conditioner comprises a compressor, an electric heating belt, a detection unit, a judging unit and a control unit, wherein the electric heating belt is used for heating the refrigerant oil in the compressor; the detection unit is used for detecting parameters representing the working state of the electric heating belt; the judging unit is used for judging whether the parameters meet preset conditions or not; and the control unit is connected with the electric heating belt, the judging unit and the compressor, and the control unit is configured to control the compressor to be started when the judging unit judges that the parameters meet the preset conditions and the compressor is not started. By feeding back the working state of the electric heating belt, normal starting of the air conditioner compressor is guaranteed, and the starting reliability of the compressor of the air conditioner is improved.

The invention discloses a hard T-shaped currency cassette structure. The hard T-shaped currency cassette structure comprises a cassette body and a cassette cover, wherein the cassette cover covers the cassette body; outer sides of four side walls of the cassette body are in the shape of a step with the large top and the small bottom; inner sides of the four side walls of the cassette body correspond to the outer sides of the four side walls of the cassette body and are in the shape of a step with the large top and the small bottom; the whole body of the outside of the cassette body is T-shaped; the size of the lower part of the outside of the cassette body is matched with that of the upper part of the inside of the cassette body; and *-shaped reinforcing ribs are arranged on the outer sides of the four side walls of the cassette body and the outer side of the bottom of the cassette body. The hard T-shaped currency cassette structure has the advantages that the structural design is quite reasonable, storage is facilitated, the whole currency cassette has a T-shaped structure, height space occupied during storage is greatly saved, the *-shaped reinforcing ribs are arranged on the outer sides of the four side walls of the cassette body and the outer side of the bottom of the cassette body so that the strength of the cassette body is greatly improved, the anti-falling performance is good, an experiment proves that when falling from a position distant from the ground by 3 meters, the currency cassette can be complete and cannot be damaged no matter which part of the currency cassette is in contact with the ground at first, and the currency cassette can be normally opened and closed.

The invention relates to a screw-nut transmission device for a steel gate. The screw-nut transmission device comprises a screw; a sleeve sleeves the screw; the lower end of the screw is provided with a connecting rod; a nut is arranged in an inner cavity at the upper end of the connecting rod and sleeves the lower end of the screw; the outer circle of the upper end of the connecting rod is provided with a flange; the upper end of the flange is provided with a sealing gasket; the upper end of the sealing gasket is provided with a pressing plate and is connected with the flange through a bolt. The screw-nut transmission device is simple in structure, scum in water can be prevented from entering the screw-nut transmission device, the seizure between the screw and the nut can be avoided, and the steel gate can be normally opened and closed.

The invention discloses a window opener convenient to open under a nonelectric state. The window opener comprises a shell, wherein a window opening component is arranged in the shell; the window opening component is connected to a reduction gear unit arranged on the shell; a fixed shaft is fixed, on the right of the reduction gear unit, in the shell; the fixed shaft is hinged to a mounting plate; a screw motor matched with the reduction gear unit is fixed on the mounting plate; the mounting plate is provided with a spring capable of enabling a screw of the screw motor to be far away from the reduction gear unit; meanwhile, the shell is hinged to a handle; a 7-shaped gear slot is formed in the shell; the handle slides in the gear slot; the handle and the screw motor are linked. The window opener has the advantage that a smoke discharge window can be normally opened under the nonelectric state.

The invention discloses electrical equipment, a standby control circuit and a control method of the standby control circuit, and the standby control circuit is connected with a main chip and a power panel of the electrical equipment and comprises a protection module, a switch module and an adjustment module; the protection module outputs a control signal output by the main chip to the switch module; when the control signal is a first level signal, the switch module outputs a corresponding trigger signal according to the control signal to control the power panel to be started; when the controlsignal is a second level signal, the switch module outputs a corresponding trigger signal according to the control signal to control the power panel to be standby; and the adjusting module adjusts thevoltage value of the trigger signal when the power panel is started, so that the standby power consumption of the electrical equipment in a standby state is effectively reduced, and the power panel can be normally started according to application requirements.

The invention relates to ship equipment, in particular to an improvement of a sonar detection naval ship sonar port rolling sliding door. The naval ship sonar port V-shaped rolling sliding door comprises a door-sliding box, wherein a rotatable winding drum is arranged in the door-sliding box; two parallel groove-shaped tracks are arranged beside the bottom of the sliding door, and a plurality of V-shaped door plates which can move along the groove-shaped tracks are arranged between the two groove-shaped tracks; through holes are formed in the two sides of each V-shaped door plate correspondingly, and the direction of the through holes is the same as that of the V-shaped door plates moving along the groove-shaped tracks; and steel wire ropes are arranged in the through holes, one end of each steel wire rope is connected to the winding drum, and the other end of the steel wire rope is connected to the last V-shaped door plate. The sliding door has the characteristics of being simple in structure, reliable in operation and not prone to jamming.

The invention relates to an anti-winding device for an itineration host swing door. The anti-winding device comprises a movable door plate (1), wherein a protective bushing (8), a nut plate (7), a pressure plate (9) and a hinge base (6) are respectively arranged at the outer side of the movable door plate (1); the two ends of the protective bushing (8) are respectively embedded between the nut plate (7) and the movable door plate (1) and between the pressure plate (9) and the movable door plate (1); a hinge is connected to the hinge base (6); a spacer bush (5) is arranged between the protective bushing (8) and the movable door plate (1); a pin roll (4) is arranged inside the spacer bush (5); and a left torsional spring (2) and a right torsional spring (3) are respectively arranged on the left and right ends of the pin roll (4). The anti-winding device for the itineration host swing door solves a problem that the spring is caught and tangled by fibre, so that the swing door is normally opened and closed, thereby avoiding a phenomenon that the fibre is caught by and tangled with the itineration host.

The invention discloses a water conservancy and hydropower assembly protection device and a using method thereof, and particularly relates to the technical field of water conservancy projects. The water conservancy and hydropower assembly protection device comprises a gate and a protection mechanism installed on the gate; the gate comprises a first door body and a second door body, a cavity is formed in the first door body, and the second door body is inserted into the cavity and is in sliding connection with the cavity; and the protection mechanism comprises vertical plates which are distributed at intervals, open grooves for containing the vertical plates are formed in the outer side of the first door body, the adjacent vertical plates are arranged in an attached mode, and connecting blocks are fixedly arranged at the top end and the bottom end of each vertical plate. According to the water conservancy and hydropower assembly protection device and the using method thereof, by arranging the protection mechanism, the multiple connecting blocks can rotate with a rotating rod as the center, so that the vertical plates are driven to be opened, water outlets are formed between the adjacent vertical plates, water flow can directly penetrate through the water outlets to flow out, the stress area of the first door body is reduced, then the workload of a forward and reverse motor in the transmission mechanism is reduced, and the service life is prolonged.

The invention discloses a pulley capable of preventing a flexible shaft from being derailed. The pulley is arranged on the flexible shaft of a switch cabinet valve opening mechanism. The pulley comprises a step shaft; a first protection plate, a ball bearing and a second protection plate are arranged on the step shaft; a square hole in the top of the first protection plate is blocked by a prism atthe end of a step on the step shaft so that the first protection plate cannot rotate; and the second protection plate connected with the first protection plate also cannot rotate either, and simply the ball bearing clamped between the two protection plates can make rotary motion on the step shaft, so that the situation that the ball bearing is the only moving component is guaranteed. When the pulley is in use, the flexible shaft, according to the requirement of a transmission path, penetrates into gaps of a screw and the ball bearing, so that the flexible shaft can surround the external wallof the ball bearing in a half manner. The flexible shaft makes linear motion, and the friction between the flexible shaft and the ball bearing allows the ball bearing to roll. The screw prevents the flexible shaft from falling off the pulley, the problems of flexible shaft clamping stagnation and winding are solved, and the situation that a switch cabinet valve can be opened normally is ensured.