Abstract: A compressor and a refrigeration system are provided. The compressor has a shell, an air cylinder assembly and a pressure relief device. The shell has a containing cavity. The air cylinder assembly is disposed in the containing cavity, and has an air suction cavity and a pressure relief channel. The pressure relief channel communicates with the air suction cavity and the containing cavity, and has a pressure relief opening. The pressure relief device is connected with the air cylinder assembly. The pressure relief device moves in the axis direction of the pressure relief channel, so as to open or close the pressure relief opening.

Abstract: A heat exchange device includes a heat exchanger and a water guider. The water guider is arranged on the heat exchanger and has a water guide groove, and condensed water on at least a part of the heat exchanger can flow out through the water guide groove. The heat exchange device has a good drainage performance, can prevent the condensed water from accumulating, and thus improves a heat exchange area and a heat exchange efficiency of the heat exchanger.

Abstract: A hormone mass spectrometric detection method based on antibody-coupled enrichment technology. The method includes the following steps: coupling antibodies and magnetic beads, adding a high-concentration methanol solution, removing endogenous hormone small molecule compounds carried on the antibodies by vortex, then restoring the activity of the antibodies to obtain antibody magnetic beads that can enrich hormone small molecule compounds. The antibodies are immobilized by magnetic beads and cooperate with the 80% methanol aqueous solution to elute hormone small molecule compounds, and then the hormone small molecule compounds are tested by mass spectrometry, thereby improving the specificity of test.

Abstract: A heat exchanger and an air conditioning unit with multiple refrigeration systems. The heat exchanger includes a first header, a second header, a third header, a fourth header, a heat exchange tube including a first heat exchange tube and a second heat exchange tube alternately arranged in a length direction of the header, and fins. The first heat exchange tube or the second heat exchange tube or both has a bent section and includes a first section, a middle section, and a second section, and the heat exchanger includes a first part including the first section, a middle part, and a second part. The middle part of the heat exchanger includes the middle section and the fins, and air flowing through the heat exchanger passes through the middle part and then the first part, or passes through the first part and then the middle part.

Abstract: A flat tube, a multi-channel heat exchanger, and an air conditioning and refrigeration system. The flat tube has n groups of flow channels extending in a length direction of the flat tube, and the n groups of flow channels are distributed to be spaced apart in a width direction of the flat tube; and a flow cross-sectional area of a first group of the flow channels is A1, . . . , a flow cross-sectional area of kth group of the flow channels is Ak, . . . , a flow cross-sectional area of an nth group of the flow channels is An, 1<k?n, Ak?1.2Ak?1, and k is an integer greater than 1.

Abstract: An electromagnetic scattering film, and an electronic device with the electromagnetic scattering film are provided. The electromagnetic scattering film includes a metal layer, wherein the metal layer is provided with a through hole penetrating through an upper surface and a lower surface of the metal layer, and a maximum value of the distance s between any two points on a contour of a section of the through hole is less than the wavelength ? of a microwave emitted into the through hole, such that the microwave is diffracted after being emitted into the through hole. By arranging, on the metal layer, a through hole being smaller than the wavelength of a microwave, the microwave, which was originally transmitted in a linear manner, is diffracted after being emitted into the through hole, thereby expanding a microwave transmission and/or receiving space range.

Abstract: A flat tube and a heat exchanger are provided. The flat tube has a first end and a second end spaced apart in a length direction of the flat tube, and a first side surface and a second side surface spaced apart in a width direction of the flat tube. The first side surface and the second side surface of the first end are provided with a first concave part and a second concave part, respectively. The first concave part and the second concave part have a first length and a second length that extend from an end surface of the first end in the length direction of the flat tube, and have a first depth and a second depth that extend in the width direction of the flat tube. The first length is not equal to the second length.

Abstract: A heat exchanger, the heat exchanger including flat tubes and fins. The flat tubes are provided at intervals along the thickness direction of the flat tubes. The flat tubes are internally provided with fluid channels extending along the longitudinal direction of the flat tubes. The fins are provided between adjacent flat tubes. A plurality of fins between adjacent flat tubes are provided at intervals along the transverse direction of the flat tubes. Each fin extends along the longitudinal direction of the flat tubes. Ventilation windows are provided on the fins.

Abstract: A liquid reservoir, a method for manufacturing the liquid reservoir, and a compressor having the liquid reservoir are disclosed. The liquid reservoir has a barrel, an air inlet tube, an air outlet tube, and a valve. The valve has a partition plate arranged in the barrel. An outer periphery of the partition plate is coupled to an inner peripheral wall of the barrel to divide the internal space of the barrel into an air inlet chamber and an air outlet chamber. The partition plate has a valve hole communicating the air inlet chamber with the air outlet chamber. A limit plate is arranged in the air outlet chamber and at least partially spaced apart from the partition plate. An outer periphery of the limit plate is coupled to the inner peripheral wall of the barrel. The limit plate has a connection hole and a guide hole.

Abstract: A method for manufacturing an antenna printed circuit board includes the following steps: providing a flexible-rigid printed circuit board comprising a flexible region and a rigid region. The flexible region comprises at least one first connecting pad and at least one second connecting pad arranged opposite sides of the rigid region. At least one antenna module is attached to the first connecting pad through a conductive paste. The antenna module is fixed on the rigid region by a first reflow soldering process. At least one radio frequency integrated circuit structure is attached to the second connecting pad through a conductive paste. The radio frequency integrated circuit is fixed on the rigid region by a second reflow soldering process. A gap between the antenna module and the rigid region and a gap between the radio frequency integrated circuit structure and the rigid region are filled with dielectric materials and cured.

Abstract: A method for manufacturing an antenna printed circuit board includes the following steps: providing a flexible-rigid printed circuit board comprising a flexible region and a rigid region. The flexible region comprises at least one first connecting pad and at least one second connecting pad arranged opposite sides of the rigid region. At least one antenna module is attached to the first connecting pad through a conductive paste. The antenna module is fixed on the rigid region by a first reflow soldering process. At least one radio frequency integrated circuit structure is attached to the second connecting pad through a conductive paste. The radio frequency integrated circuit is fixed on the rigid region by a second reflow soldering process. A gap between the antenna module and the rigid region and a gap between the radio frequency integrated circuit structure and the rigid region are filled with dielectric materials and cured.

Abstract: Described are an image decoding method, a decoder and a storage medium. The image decoding method comprises: receiving code stream data, and parsing the code stream data to obtain a coding tree unit corresponding to the code stream data; detecting an ith node of an ith layer corresponding to the coding tree unit to obtain an ith detection result, i being an integer greater than 0; acquiring, according to the ith detection result, a (i+1)th node of a (i+1)th layer corresponding to the coding tree unit; continuing to detect the (i+1)th node, and traversing all the nodes corresponding to the coding tree unit until all the coding unit data corresponding to the coding tree unit is obtained; and generating a decoded image corresponding to the code stream data according to all the nodes and all the coding unit data.

Abstract: A control method and system for refrigeration, oil return and noise reduction of a multi-split air-conditioner. The method comprises: when the accumulative time that the frequency of a compressor is smaller than the set frequency threshold reaches the oil return cycle and a standby indoor unit exists, conducting an oil return running mode; resetting the accumulative time; starting counting the oil return running time; calculating the indoor unit starting load; determining the opening degree of an expansion valve of the standby indoor unit according to the indoor unit starting load and whether there is anyone in a room where the standby indoor unit is located; controlling the compressor to run according to the set oil return frequency; and when the oil return running time reaches the oil return set time, exiting the oil return running mode, and conducting a normal refrigerating running mode.

Abstract: The present disclosure discloses a control method for an air conditioning system. The air conditioning system at least includes a compressor, a heat exchanger and a throttle device. The operation phase of the air conditioning system at least includes a start-up phase and a stable phase. The control method includes an action that in the start-up phase, the operating time of the compressor is set as t, when t is greater than 0 and less than 60s, an operating frequency F of the compressor is controlled to be less than 75 Hz, and a frequency rise speed per second Vf of the compressor is controlled to be less than 1.25 Hz/s.

Abstract: A hierarchical control method for an island power grid energy storage system for increasing new energy generation fluctuation is disclosed. The method includes implementing a rolling dispatch method based on an idea of model predictive control; comprehensively considering a response capability of the energy storage system to grid-wide economic dispatch instructions and life loss of energy storage lithium batteries, and constructing an objective function of an intraday control model of the energy storage system with economic optimization; and constructing, on a basis of satisfying the objective function of the intraday control model, a real-time control model of the energy storage system and solving the model, and determining charge and discharge plans of a lithium battery energy storage system and a supercapacitor energy storage system.

Abstract: An image decoding method, a decoder and a storage medium are porovided. The method includes: receiving code stream data, and parsing the code stream data to obtain a coding tree unit corresponding to the code stream data; parsing an i-th node of i-th layer corresponding to the coding tree unit to obtain i-th state parameter and i-th flag parameter corresponding to the i-th node; performing detection processing on the i-th node according to the i-th state parameter and the i-th flag parameter to obtain an i-th detection result; acquiring a (i+1)th node of a (i+1)th layer corresponding to the coding tree unit; continuing to perform detection processing on the (i+1)th node, and traversing all the nodes corresponding to the coding tree unit until all the coding unit data corresponding to the coding tree unit is obtained; and generating a decoded image corresponding to the code stream data.

Abstract: Disclosed are a heat exchange tube, a processing method for same, and a heat exchanger having same. The heat exchange tube (10a, 10b, 10c, 10d, 10e) includes a body portion (11a, 11b, 11c, 11d, 11e) provided with a plurality of flow channels (111a, 111b, 111c, 111d, 111e) arranged in parallel and spaced apart with each other, the length direction of the flow channel (111a, 111b, 111c, 111d, 111e) being parallel to the length direction of the body portion (11a, 11b, 11c, 11d, 11e); at least one side of the body portion (11a, 11b, 11c, 11d, 11e) is provided with an extension portion (12a, 12b, 12c, 12d, 12e) along the width direction of the body portion (11a, 11b, 11c, 11d, 11e); and the extension portion (12a, 12b, 12c, 12d, 12e) and at least part of the body portion (11a, 11b, 11c, 11d, 11e) are formed by folding the same plate material.

Abstract: A heat exchanger includes a collecting pipe, a number of heat exchange tubes and a distribution pipe. A pipe wall of the distribution pipe defines a number of through holes communicating with the collecting pipe. The through holes are a first through hole, . . . an (n?1)th through hole and an nth through hole disposed in sequence along a direction from a first end to a second end of the distribution pipe. A distance between an (i+1)th through hole and an ith through hole is: di=?iL0, i=1,2, . . . n?1, ?=0.618, L0 is a distance between adjacent heat exchange tubes. As a result, uniformity of refrigerant distribution in the heat exchanger is improved.

Abstract: A heat exchanger has a collecting pipe, a separator and a number of heat exchange tubes. The collecting pipe has a pipe wall and an inner cavity. The separator is provided in the inner cavity. The separator extends along a lengthwise direction of the collecting pipe. The separator divides the collecting pipe into a first cavity and a second cavity. The heat exchange tubes are arranged along the lengthwise direction. Each heat exchange tube has a first end and an inner cavity. The first end of the heat exchange tube sequentially passes through the pipe wall of the collecting pipe, the first cavity and the separator to be inserted into the second cavity. The inner cavity of the heat exchange tube is communicated with the second cavity. As a result, uniformity of refrigerant distribution in the heat exchanger is improved.

Abstract: A double-row bent heat exchanger is provided. The heat exchanger includes: a first header and a second header; flat tubes each divided into a first straight segment connected to the first header, a second straight segment connected to the second header and a twisted segment connected between the first straight segment and the second straight segment, along a length direction of the flat tube; and fins disposed between adjacent first straight segments and between adjacent second straight segments. The flat tube is bent at the twisted segment around a first bending axis (L) to provide a first bending portion. The first header and the second header are bent around at least one second bending axis (K) to provide at least one second bending portion.