30results about How to "No added noise" patented technology

The invention discloses a range hood. The range hood comprises a box body structure and a fan frame used for arranging a fan system, the box body structure is arranged below the fan frame and comprises a lower box body, a first air inlet and a second air inlet are formed in the lower box body in a left-right spaced mode, a first cavity and a second cavity which are independent and serve as air inlet cavities are formed in the lower box body, the first cavity corresponds to the first air inlet, and the second cavity corresponds to the second air inlet; the range hood further comprises an annular oil filtering plate, the oil filtering plate comprises a net-shaped structure, the part, located on the left side of the position where the net-shaped structure abuts against the bottom of the lower box body, of the net-shaped structure is a ventilation area corresponding to the first cavity, and the part, located on the right side of the position where the net-shaped structure abuts against the bottom of the lower box body, of the net-shaped structure is a ventilation area corresponding to the second cavity; and the oil filtering plate can rotate around a rotating shaft extending in the front-back direction, and therefore the areas of the ventilation areas on the left side and the right side of the net-shaped structure are adjusted.

The invention consists of a sealed cabinet and an air valve, and at one end of the sealed cabinet is disposed an air intake and at the other end is disposed an air blowing-in port. There is an air-diffusing board between the air intake and the air blowing-in port. On one side of the sealed cabinet is set an air return port, outside which is disposed a side cabinet connected with the air return port, and at each end of the side cabinet is disposed the air intake separately. The air valve disposed in the air return port is connected electrically with a controller disposed in the electrical apparatus box jointed firmly with the sealed cabinet. Because of connecting a by-pass pipeline between the air intake and the air blowing-in port, the present invention can automatically regulate the aperture of the air valve to make the residual hot-air and cold-air return to the air return system of the ceiling directly.

The invention discloses a range hood. The range hood comprises a box body structure and a fan frame used for arranging a fan system, the box body structure comprises a lower box body, a first air inlet and a second air inlet which are arranged in a left-right spaced manner are formed in the lower box body, and a first cavity and a second cavity which are independent and serve as air inlet cavities are formed in the lower box body; the first cavity corresponds to the first air inlet, and the second cavity corresponds to the second air inlet; and the range hood further comprises a first filter and a second filter, the first filter corresponds to the first cavity, and the second filter corresponds to the second cavity. The first filter comprises a first filter screen, the second filter comprises a second filter screen, the left part, abutting against the bottom of the lower box body, of the first filter screen is a ventilation area, and the right part, abutting against the bottom of the lower box body, of the second filter screen is a ventilation area; and the first filter and the second filter can rotate around a rotating shaft extending in the front-back direction, and therefore the area of the ventilation area of the first filter screen and the area of the ventilation area of the second filter screen are adjusted.

The invention disclose a range hood. The range hood comprises a box body structure and a fan frame used for arranging a fan system, the box body structure comprises a lower box body, a first air inlet and a second air inlet are formed in the lower box body, a first cavity and a second cavity which are independent and serve as air inlet cavities are formed in the lower box body, the first cavity corresponds to the first air inlet, and the second cavity corresponds to the second air inlet; a flow distribution cavity is formed in the box body structure; a first partition plate is arranged in the flow distribution cavity and divides the flow distribution cavity into a left part and a right part, a first filter screen and a second filter screen are arranged on the left side and the right side of the first partition plate respectively, the first filter screen corresponds to the first cavity, and the second filter screen corresponds to the second cavity; and an adjusting plate is arranged on the first partition plate, two ends of the adjusting plate extend to the first filter screen and the second filter screen respectively, and the adjusting plate can rotationally adjust the area of the ventilation area of each filter screen.

The invention provides an image processing method for eliminating a false contour. The method comprises the following steps of: detecting each false contour pixel point which corresponds to a certain pixel value and belongs to the false contour; and eliminating the false contour by changing the spatial distribution of the pixel values. By changing the spatial distribution of color values and generating new color values by using the vision average characteristics of human eyes, the false contour in an image is eliminated. During elimination of the false contour, details of the image cannot be lost, an additional noise is avoided, bit depth is not required to be increased, and hardware resources are greatly saved.

The invention discloses a microbial degradation closestool, which belongs to the technical field of environment-friendly closestools. The closestool comprises a closestool seat which is provided witha degradation cavity and is also provided with a closestool opening and an exhaust pipe opening communicated with the degradation cavity; the closestool further comprises an air draft device which isarranged on the outer side of the closestool seat, and a part of an air draft opening of the air draft device is communicated with the degradation cavity through an air draft pipe orifice; the closestool further comprises an exhaust pipe, one end of the exhaust pipe is connected with the other part of the exhaust opening of the exhaust device, and the other end of the exhaust pipe penetrates through the exhaust pipe opening, extends to the position below the closestool opening and is communicated with the degradation cavity. According to the microbial degradation closestool, odor is sucked through the exhaust pipe extending to the closestool opening, and therefore, a better odor suction effect is achieved.

The invention discloses a dryer which comprises a body, a thermoelectric refrigerating unit and a drying chamber, wherein a containing cavity is defined inside the body provided with a through hole, and the containing cavity is communicated with the outside through the through hole. The thermoelectric refrigerating unit is arranged inside the containing cavity and is provided with a heating cavity and a cooling cavity, and an inlet of the heating cavity and an outlet of the cooling cavity are both communicated with the outside. An inlet of the drying chamber is connected with an outlet of the heating cavity, and an outlet of the drying chamber is connected with an inlet of the cooling cavity. According to the embodiment, the dryer has the advantages of being convenient to install and use, low in noise, high in drying efficiency, low in energy consumption and the like.

The invention provides a guiding device of an electronically controlled electric vehicle door. The system comprises vehicle door systems (1) and a door head mechanism (7), wherein each vehicle door system (1) comprises left and right door leaves (1-1) and a shifting fork (1-2). The guiding device is characterized in that a door control unit (6) gives an instruction, then a motor drives variable diameter screws to rotate, and variable diameter nuts drive the shifting fork and the door leaves to carry out linear motion along the axis direction of the screws, thus quick opening and closing of the vehicle door are achieved through screwing of a minor-diameter nut-screw pair, and quick self-locking of the vehicle door is achieved through screwing of a major-diameter nut-screw pair. According to the guiding device, a locking device and a transmission device are combined into a whole; the minor-diameter part achieves quick opening and closing of the vehicle door; the closing speed is improved to 1.5-4.5s; spherical guide wheels and guide rails form point contact; when the guide wheels roll, the frictional resistance is low and the frictional heat is still maintained at the original level, so that noises can not be added; the screw-nut screw pairs achieve self-lubricating and the operating states are ensured without oiling, thus reducing the maintenance cost; and a more advanced, reasonable, safe and quick vehicle door system is formed.

The invention provides a serial-parallel centrifugal fan and a control method thereof. The serial-parallel centrifugal fan comprises a left volute (1), a left centrifugal fan blade (2), a right volute(3), a right centrifugal fan blade (4), a motor assembly (5) and an outer cover (6). The left volute (1) is provided with a left volute air inlet (1.1) and a left volute air outlet (1.2). The right volute (3) is provided with a right volute air inlet (3.1), a right volute air outlet (3.2), a second air outlet (3.3) and an air outlet control assembly (3.4). The outer cover is provided with an outer cover left air inlet (6.1) and an outer cover left air inlet control assembly (6.2). The opening or closing of the right volute air outlet (3.2) and the second air outlet (3.3) is controlled throughthe air outlet control assembly (3.4), the opening or closing of the outer cover left air inlet (6.1) is controlled through the outer cover left air inlet control assembly (6.2), and the switching operation of the centrifugal fan in three modes of the small air volume high static pressure mode, the large air volume low static pressure mode and the middle air volume middle static pressure mode isrealized through different combinations, so that the requirements of products for different working conditions of the centrifugal fan are met.

The invention relates to a four-wheel vehicle driven by electric power, in particular to an electric sedan. The sedan comprises a bodywork, a chassis, an accumulator positioned on the chassis and an electric control device; a rotary wheel in the front of the rear row of seats of the bodywork is a handwheel; the handwheel is connected with a gear transmission device of the handwheel through a gimbal transmission shaft; the gear transmission device of the handwheel is fixedly connected with a generator I; the generator I is connected with the accumulator through a conducting wire; a rotary wheel in the front of a codriver seat of the bodywork is a pedal rotary wheel; the pedal rotary wheel is fixedly connected with a gear transmission device of the pedal rotary wheel; the gear transmission device of the pedal rotary wheel is fixedly connected with a generator II; and the generator II is connected with the accumulator through the conducting wire. The electric sedan with the structure improves continuous navigating capacity of the sedan, does not increase the driving resistance of the sedan and noise generated in the driving process; and the whole sedan has lighter weight, is green and environment-friendly and has a simple structure and easy operation.

The invention discloses a range hood which comprises a box body structure and a fan frame used for arranging a fan system. The box body structure is arranged below the fan frame, an air inlet is formed at the bottom of the box body structure, and a lampblack airflow channel is formed between the air inlet and the fan frame. The range hood is characterized in that a filter is mounted in the box body structure, the filter is in a hollow column shape, so that lampblack airflow enters the filter from the peripheral wall and is discharged from the axial end part, the filter is divided into a filtering part for the lampblack airflow to pass through and a non-filtering part for preventing the lampblack airflow from passing through along the peripheral direction, and the filter can rotatably change the ventilation area of the filtering part towards the lampblack airflow. Compared with the prior art, the range hood has the advantages that the filter is divided into the filtering part and the non-filtering part in the circumferential direction, and the passing air volume can be adjusted through rotation, so that different actual requirements are met, and the lampblack suction effect is improved.

The present invention discloses an image illumination correcting method based on color gamut mapping. The brightness of input image and R, G, B values after color space decomposition are separated and processed. Then, the brightness obtained by brightness enhancement calculation is multiplied by the R, G, B values after color space decomposition for restoring the image after illumination correction. The color space decomposition and brightness enhancement can increase the image contrast, better retains the color of original image and does not increase the noise of image. Simultaneously the illumination correction method adopted by the invention processes based on the pixel of image. The image switching and counting of image information are not required. The computing complexity is reducedand the hardware realization of the method is facilitated. Additionally, a complementary operation of image is adopted for high-brightness illumination environment so that the brightness enhancement operation has better versatility and can simultaneously process a plurality of complex illumination conditions.

The invention relates to an air conditioner device. According to the main technical scheme, the air conditioner device comprises an air conditioner inner unit and an air conditioner outer unit. The air conditioner inner unit comprises a shell, a heat exchanger, a first pipeline and a draught fan system. A wind outlet and a wind return opening are formed in the shell. The heat exchanger is arranged in the shell and used for exchanging heat with return wind entering the shell. One end of the first pipeline is arranged in the shell, and the other end of the first pipeline is arranged outdoors. The draught fan system is arranged in the shell and used for making outdoor fresh air enter the shell through the first pipeline and making fresh air and return air entering the shell conveyed outdoors through the wind outlet in the shell. The air conditioner device is mainly used for supplying fresh air, free of additional power devices, low in energy consumption and beneficial to user health.

The invention discloses a range hood, comprising a box body structure and a fan frame for setting a fan system. The box body structure is arranged below the fan frame, and an air inlet is opened at the bottom of the box body structure. An oil fume airflow channel is formed between the air inlet and the fan frame, and it is characterized in that: a filter is arranged in the box structure, and the filter is in the form of a hollow column, so that the oil fume airflow enters the filter from the peripheral wall and flows from the axial direction to the filter. The end is discharged, and the filter is divided into a filter part for supplying the oil fume flow and a non-filter part for blocking the oil fume flow along the circumferential direction. The filter can rotatably change the ventilation area of ​​the filter part toward the oil fume flow. Compared with the prior art, the present invention has the advantages that: by dividing the filter into a filtering part and a non-filtering part in the circumferential direction, the passing air volume can be adjusted by rotation, thereby meeting different actual requirements and improving the effect of absorbing oil fume.

A multi-isotope magnetic resonance signal synchronous excitation and detection method and device thereof are disclosed. The measurement method comprises using a plurality of AC magnetic fields to simultaneously perform excitation and measurement on a work element containing a plurality of isotopes, wherein the number of AC magnetic fields is consistent with the number of isotopes and the ratio of center frequencies of the AC magnetic fields is constant and is the same as the ratio of magnetogyric ratios of the respective isotopes. The different AC magnetic fields use the same low frequency sinusoidal signal for modulation and detected signals are demodulated by another signal on the same frequency as the low frequency signal. The method and device of the invention save the process of extracting the isotopes of the element, save the cost, weaken the interference between the magnetic resonance signals of all the isotopes, are used in an Mz magnetometer, and improve the accuracy and sensitivity of the magnetic resonance signal extraction.

The present invention discloses a method for eliminating the heat exchanging corner and an air condenser thereof. According to the method, the air outlet of an axial flow fan is provided with one group of guiding plate for changing the air direction partially and flowing to the heat exchanging corner. The air condenser manufactured according to the method of the invention comprises a steam distributing pipe (1) which is connected with a condensation water tank (3) through two groups of heat exchanging pipes (2). The axial flow fan (4) which is equipped with a fan cover plate (5) is provided below the heat exchanging pipe. One group of guiding plates (6) is provided on the fan cover plate, wherein the guiding direction of the guiding plate is oriented to the heat exchanging corner (8) at the bottom of the heat exchanging pipe. According to the invention, the air flow and the heat exchanging efficiency at the bottom corner of the heat exchanging pipe can be increased with lower cost andsimple method at the state that the noise is not increased.

The invention discloses a range hood, comprising a fan frame for setting a fan system, the range hood further comprising a hollow lower box body, the lower box body is located under the fan frame and is in fluid communication, the The bottom of the lower box is provided with a first air inlet and a second air inlet arranged at intervals on the left and right, and a first chamber and a second chamber as air inlet chambers are formed inside the lower box. The air outlet corresponds to the first chamber, and the second air inlet corresponds to the second chamber; the range hood further includes a filter device, and the filter device allows the oil fume of the first chamber and the second chamber to pass through, And the filter device can move left and right, so as to change the ratio of the oil fume flow in the first chamber and the second chamber. Compared with the prior art, the present invention has the advantage that the total air volume does not need to be increased, so as to solve the problem that the same side of the corresponding range hood can greatly improve the effect of absorbing range hood when one side is stir-frying and cooking.

The present invention claims to protect an InGaAs single-photon avalanche photodiode with wide spectral response, including a substrate, a short-wave light transmission window is arranged on the substrate, an n-electrode is arranged on one side of the substrate, and an n-electrode is arranged on the other side. There is a corrosion cut-off layer, and an InGaAs standard wavelength absorption layer, a long-wave absorption layer, a gradient layer, a charge layer, a multiplication layer and a passivation layer are sequentially arranged on the corrosion cut-off layer. A ladder-type PN junction is arranged in the multiplication layer, and a p-electrode and a passivation layer are arranged on the other side of the multiplication layer. The p-electrode, the ladder-type PN junction, and the light-transmitting window are all on the same axis. The invention adopts the long-wave absorbing layer to absorb photons with a wavelength of 1700nm-1800nm, and at the same time prevents the photons in the 760nm-900nm band from being absorbed in the substrate material through the light-transmitting window on the substrate. The response wavelength range of the InGaAs single-photon avalanche photodiode is extended from 900nm-1700nm to 760nm-1800nm, and the detection sensitivity of a single photon is provided in this wavelength range.

The present invention discloses an image illumination correcting system based on color gamut mapping. The brightness signal of input image and R, G, B signals after color space decomposition are separated and processed. Then, the brightness value of brightness signal obtained by brightness adjustment is multiplied by the R separation color signal, G separation color signal and B separation color signal after color space decomposition for recovering and obtaining image after illumination correction. The novel color space decomposition and brightness adjusting can better retain the color of original image while the picture contrast is increased and the noise of image is not increased. Simultaneously, the illumination correcting system adopted by the invention strengthens the dark-light partand suppresses the high-light part in a brightness adjusting calculating module. The image containing high-light and dark-light can be processed.