39results about How to "No increase in volume" patented technology

The invention discloses a multifunctional pressure cooker. The multifunctional pressure cooker comprises a cooker body and a cooker cover, the cooker cover comprises an upper cover body and an inner cover body, and the upper cover body is provided with a water injection port for injecting cooling water to the inner cover body; the multifunctional pressure cooker further comprises a water tank anda shielding cover; the multifunctional pressure cooker has a water-cooled cooking state in which the water tank is installed and a normal cooking state in which the shielding cover is installed, whenthe water tank is installed on the cooker cover, the water tank discharges water to the water injection port, and when the shielding cover is installed on the cooker cover, the shielding cover shieldsthe water injection port. The multifunctional pressure cooker can be used as a water-cooled pressure cooker by installing the water tank and used as a normal pressure cooker without installing the water tank.

The invention discloses a linear power amplification circuit based on the simulation of predistortion, comprising a predistortion amplifier, a first temperature-controlled attenuator, a simulate predistorter, a second temperature-controlled attenuator, a push-pull amplifier, and a last stage high-power amplifier which are sequentially connected. The invention also discloses a method to use the circuit: the simulate predistorter circuit which has relatively simple topological structure is added to produce a distortion signal of a predistortion signal balanced power amplifier; a matching circuit and a bias voltage of a power tube of the push-pull amplifier and that of the last stage high-power amplifier are adjusted to make the two power tubes complement in amplitude and phase to achieve the predistortion effect and to enable better linearity of the RF output signal. The invention is simple in circuit structure, high in working efficiency, low in cost and occupies little PCB area, which is extremely suitable for the multi-carrier linear power amplification circuits in the TD-SCDMA stations and the repeaters systems.

A high-voltage vacuum breaker is used for operation or exit of an electrical apparatus in an electrical power system; the high-voltage vacuum breaker comprises a control panel, a control chamber, an arc-estinguishing chamber, an entrance insulative bushing, a digital relay, an electronic current mutual inductor, an outlet insulative bushing,; the electronic current mutual inductor is provided in the entrance or the outlet insulative bushing and connected with the digital relay; the digital relay is composed of a filtering and amplitude adjusting module, an A/D converting module, a CPU processing module, a liquid crystal display module, and a switch quantity input and output module, and is connected with an operation mechanism of the breaker by the switch quantity input and output module. Compared the invention with a current technic, the volume is not increased, measurement, protection and diagnoses functions in an electrical power line are organically integrated, added functions perform real-time on-line monitoring on a work state, a loop control state, and a coil opening/closing state of the breaker, thereby realizing intelligentized independent operation of the breaker.

The utility model discloses an aerial drift projection device, wherein, a projector and a screen are arranged in the aerial drift device. The projector is positioned in a housing; one end of the housing is sealed and fixed at the inner wall of the aerial drift device, and the other end is sealed with the wall of the aerial drift device through the inner wall. The projector is fixedly positioned at the housing; a viewing mirror is positioned at a lens hole; the viewing mirror and the lens hole are sealed between each other; the screen is fixedly positioned at the aerial drift device. The relative position between the wall of the aerial drift device and the screen is made of transparent materials; a conductor hole and a heat sink are positioned at the end of the housing through the outer wall of an aerial drift display screen. A display screen is positioned at the aerial drift device, and the content of advertisement can be switched under the control of the microcomputer. Drifting in the air without the constrains of the location and the time, the visual field is broad, with wide range of infection, and then a plurality of advertisements can be broadcasted in a sustained period, saving advertising resources and cost.

The invention relates to a universal case for a molded case circuit breaker, the molded case circuit breaker and a residual current circuit breaker. According to the structure of the universal case for the molded case circuit breaker, the external dimensions and the mounting dimensions of the structures of the molded case circuit breaker and the residual current circuit breaker are consistent, and the part universality reaches over 95 percent, namely the size increase is avoided, and the development cost and the die cost are lowered. Moreover, the molded case circuit breaker and the residual current circuit breaker are conveniently arranged and replaced by a user. Unified external dimensions and unified appearance are adopted for the residual current circuit breaker and the molded case circuit breaker with the structure. Arc extinction systems, contact systems and operation systems in the residual current circuit breaker and the molded case circuit breaker are completely consistent, and release structures of the residual current circuit breaker and the molded case circuit breaker are different.

The invention relates to ratchet wrench. It includes handle and sleeve. Its feature is that the handle is formed by upper and lower covers; and the lower one is set one flute to lay the sleeve. Compared with the existing technique, the advantages of the invention are that the upper and lower covers are designed by composite type; it only needs to open the upper cover while taking and putting the sleeve; it can save wrench working time; the processing the upper and lower cover is simple; the production cost is low.

The folded collapsed boxes containing substantially no open gaps are provided. A plurality of different size folded collapsed boxes can be bundled together to yield a display that has the maximum number of folded collapsed boxes displayed thus conserving space.

Disclosed is a wall air conditioner structure, in which an evaporator and an evaporator-putting space length are reduce, so a headspace can be left on their side for putting a modular unit. The modular unit may be a water valve unit or a humidifying unit or an air-cleaning unit or a ventilating unit and the like, so in the headspace can be mounted a specific modular unit according to the user's needs.

The invention provides a method for improving the performance of a seismic exploration moving coil detector and an adjunct circuit. An electromagnetic feedback circuit is additionally arranged outside the signal output end of the detector, and the circuit can be integrated at the front end of a data collecting circuit of a seismic exploration instrument. According to a traditional low-frequency detector, the electromagnetic feedback force of the detector is enhanced by increasing the size of a permanent magnet and a coil. A circuit for enhancing electromagnetic force feedback is additionally arranged at the output end of the moving coil detector, the parameter of the feedback circuit is designed according to the dynamic characteristic of electromagnetic force of the detector, the electromagnetic force of the coil is enhanced through an electronics method, electromagnetic induction is increased, and therefore the low-frequency characteristic of the detector and the bandwidth of frequency responses are improved. Through the low-cost electronics method easy to implement, the characteristic of the low-frequency responses of a common detector is improved. The detecting result indicates that after the detector with the natural frequency of 10 Hz is improved, the defector with the natural frequency equivalent to 3 Hz to 5 Hz can be achieved conveniently.

The invention discloses an automatic braking and accurate control type slurry pulser for petroleum drilling. The automatic braking and accurate control type slurry pulser for petroleum drilling comprises an iron core and a driving shaft. The iron core and the driving shaft are coaxially arranged. The driving shaft is located in the iron core. An outer hollow column and an inner hollow column are arranged between the iron core and the driving shaft and fixedly connected with the inner side wall of the iron core and the outer side wall of the driving shaft correspondingly. Multiple permanent magnets are symmetrically embedded into the side wall of the inner hollow column, multiple installation grooves are symmetrically formed in the outer hollow column, and a solenoid coil and a braking mechanism are fixedly installed in each installation groove. The automatic braking and accurate control type slurry pulser for petroleum drilling is novel in structure and convenient and fast to overhauland replace. The stable tension can be provided for the driving shaft through the devices such as the solenoid coils and the permanent magnets. Braking wheels enable the driving shaft to be rapidly braked, the springback problem cannot appear, and therefore the stroke accuracy of the slurry pulser is higher.