72 results about "Evaporation duct" patented technology

The invention discloses a parameter optimization method based on an evaporation waveguide and troposphere scattering mixed channel, and the method comprises the steps: calculating the loss of a microwave propagation path through simulating a near sea surface evaporation waveguide and troposphere scattering environment in combination with an evaporation waveguide model, a troposphere scattering model, an atmospheric absorption attenuation model and a parabolic equation model; and obtaining the optimal transmitting antenna height, the optimal receiving antenna height and the optimal electromagnetic wave frequency under the evaporation waveguide and troposphere scattering mixed channel by using the target function and a global optimization algorithm. The method disclosed by the invention can adapt to application scenes such as complex offshore beyond visual range communication, can provide a flexible optimization scheme for different offshore propagation conditions and distances, and realizes all-weather beyond visual range communication by combining the advantages of an evaporation waveguide channel and a troposphere scattering channel; the influence of communication system parameters on electromagnetic wave propagation under an evaporation waveguide and troposphere scattering mixed channel can be effectively reflected, the loss of an electromagnetic wave propagation path is remarkably reduced, and the reliability of signal transmission is improved.

The invention relates to the technical field of aerospace meteorology, and particularly discloses a domestic numerical weather forecast mode-based evaporation waveguide height determination method, which comprises the following steps of: obtaining meteorological coupling data output by a domestic numerical weather forecast mode CMA-MESO; determining parameters according to the meteorological coupling data and a turbulent flux algorithm COARE; constructing a temperature vertical profile and a specific humidity vertical profile according to the parameters, the Monin-Obchhoff similarity theory and an NPS model; constructing a modified refractive index profile according to the temperature vertical profile and the specific humidity vertical profile; and determining the height of the evaporation waveguide according to the height corresponding to the lowest point of the corrected refractive index profile. The method is suitable for determining the evaporation waveguide height in a domestic business meteorological mode.

The invention relates to the field of radio transmission, and discloses an evaporation waveguide-based beyond-visual-range communication parameter dynamic adjustment method, which comprises the following steps of: installing a meteorological sensor and a hydrological sensor at a specified height of an offshore launching platform, and obtaining meteorological and hydrological data at the specified height; calculating to obtain an evaporation waveguide height diagnostic value and an atmospheric correction refractive index profile by using the obtained meteorological and hydrological data; according to the obtained atmosphere correction refractive index profile, the lowest trapping frequency and the critical incident angle in the current environment are obtained through calculation; determining a communication frequency range and antenna parameter ranges of the transmitting end and the receiving end; and searching in a communication frequency range and an antenna parameter range by adopting a particle swarm optimization algorithm to obtain the communication frequency with the minimum propagation loss and the optimal antenna parameter configuration. According to the method disclosed by the invention, the optimal frequency capable of carrying out beyond visual range communication in the evaporation waveguide environment can be output in real time, and the antenna parameters of the system are dynamically adjusted through the antenna servo system according to the meteorological and hydrological environment.

The invention discloses a regional evaporation waveguide prediction method based on path loss inversion, and relates to the technical field of maritime communication. Actual measurement path losses corresponding to the multiple propagation signals are obtained through a point-to-point microwave propagation link, inversion is carried out on the actual measurement path losses corresponding to the multiple propagation signals, and the long-time-sequence evaporation waveguide height is obtained; taking the long-time-sequence evaporation waveguide height and the corresponding long-time-sequence meteorological and hydrological characteristics as a training sample set, training a recurrent neural network, and obtaining an evaporation waveguide height prediction model; the meteorological and hydrological characteristics comprise wind speed, air temperature, humidity, sea surface temperature, evaporation capacity, atmospheric pressure and rainfall capacity; predicting an evaporation waveguide height prediction value of each grid point in the target area through an evaporation waveguide height prediction model; and generating continuous regional evaporation waveguide height distribution through inverse distance weighted interpolation according to the evaporation waveguide height prediction value of each grid point in the target region. The method improves the prediction accuracy of the regional evaporation waveguide.

The present invention relates to the technical field of airtightness detection of pipes, and specifically to a leakage detection device for a fuel evaporation pipe, which includes a detection chassis and a detection mechanism arranged inside the detection chassis. An adjustment mechanism is also arranged inside the detection chassis. The adjustment mechanism includes a group of adjustment boxes movably installed on the side wall of the detection chassis. An activity port is opened on the front surface of the adjustment box, and a carrier plate is arranged outside the activity port. A main connector is arranged at the center position of the front surface of the carrier plate and serves as a detection port for airtightness detection. By arranging a number of replacement mechanisms, according to the model of the evaporation pipe actually detected, the spare connectors in different positions of the replacement mechanism are selected to be connected to the main connector, so as to realize multi-purpose use of one machine and improve convenience. By arranging a rotation mechanism to finely adjust the main connector, the direction of the detection port of the main connector is changed, which reduces the bending and twisting degrees of the evaporation pipe when it is connected to a certain extent and avoids affecting the finished product quality of the evaporation pipe.

An evaporation duct diagnosis method based on EDH-SimUNet uses a variety of data collected within a region as input to the evaporation duct model and predicts the evaporation duct height above the sea surface in the region. The evaporation duct model is structured using EDH-SimUNet, which uses depthwise separable convolution for downsampling, transposed convolution for upsampling, and skip connections to mitigate gradient vanishing and information loss. EDH-SimUNet avoids the significant discrepancies in diagnostic results caused by the determination of universal functions, stability correction functions, and scale parameters in physical models under inhomogeneous and strongly stable atmospheric conditions. This diagnostic method effectively addresses the high time cost of iterative calculations in traditional physical evaporation duct models when diagnosing duct height. It can also adapt to changing data and environments, automatically adjusting parameters to optimize performance, and easily expand to new datasets and tasks.

The utility model discloses an evaporator assembly and refrigeration equipment, evaporator assembly is used for installing in refrigeration equipment, and evaporator assembly includes two groups of evaporation pipeline that set up adjacently, a plurality of fin fixedly on every group of evaporation pipeline, heating device for heating defrosting, and heating device includes two groups of heating wire, in the thickness direction of evaporator assembly, two groups of heating wire and two groups of evaporation pipeline are alternately arranged and set, and heating wire is fixed on fin. The utility model adopts two groups of heating wire and two groups of evaporation pipeline and alternately sets, and the heat of heating wire between two groups of evaporation pipeline can conduct to the evaporation pipeline position of both sides to heat defrosting to the frost on the both sides surface of evaporator assembly, to improve the efficiency of evaporator assembly heating defrosting. And, heating wire is directly contacted with fin, and the heat of heating wire is conducted to the surface of evaporator assembly through fin.

A heat dissipation cabinet includes a cabinet body and a heat dissipation apparatus. A first accommodation region of the cabinet body can accommodate a plugboard in a stacked manner, and heat source components of the plugboard dissipate heat through the heat dissipation apparatus. An evaporator, a condenser, and an evaporation pipeline of the heat dissipation apparatus are connected to a liquid return pipeline to form a heat exchange loop, and the evaporator is in thermal contact with an outer surface of a heat source component. The condenser is disposed in a second accommodation region and located above the evaporator. A refrigerant flows in the heat exchange loop, to draw heat of the heat source component far to the condenser, and take away heat of the condenser using air generated by a fan. A second accommodation region is used as an independent air duct whose path is relatively short.

The invention relates to the technical field of wireless communication, and discloses an offshore wireless propagation path loss hybrid modeling method suitable for an evaporation waveguide condition, which comprises the following steps: defining a coherent transition distance and a sight distance limit distance, and dividing a propagation area into a coherent interference dominant area, a transition area and an evaporation waveguide dominant area; constructing a CI-MTR core model used for describing the path loss of the coherent interference dominant region; based on a parabolic equation method, calculating path loss under an evaporation waveguide condition, and calculating an environmental excess loss item used for representing path loss change caused by a refraction effect; designing a transition weighting function for smooth fusion model prediction in the transition region; and combining the CI-MTR core model, the environmental excess loss item and the transition weighting function by adopting a piecewise function to form a unified mixed path loss model CI-MTR-PE. And path loss prediction with high precision, high physical interpretability and high calculation efficiency in a full-distance range is realized.

A kind of mute dehumidifier, including evaporator, collector, condenser, compressor, throttling element and connecting pipeline, evaporator, condenser, compressor and throttling element are connected by connecting pipeline;Evaporator is fixedly arranged in the first side of wall in indoor, evaporator includes evaporation pipe and temperature guide plate, evaporation pipe is fixedly installed temperature guide plate away from wall side, temperature guide plate covers at least part wall, collector is located below temperature guide plate, for collecting water drop condensed and fallen of temperature guide plate;Or, evaporator is fixedly arranged below floor or roof in indoor, temperature guide plate is arranged below evaporator, temperature guide plate is partially or entirely inclined at a certain angle, so that condensate can slide along temperature guide plate to lower position, collector is located below temperature guide plate, for collecting water drop condensed and fallen of temperature guide plate.The mute dehumidifier of the application removes fan, uses natural convection mode, not only can realize energy saving, but also can realize mute function.

The invention relates to the technical field of radar signal processing, and discloses an evaporation waveguide height prediction method for radar sea clutter, and the method comprises the steps: optimizing an initial population based on an elite reverse learning strategy to construct an initial solution population; wherein the initial solution population is composed of estimated angle values; classifying the initial solution population according to the fitness values of the king butterfly individuals in the initial solution population to obtain a high-quality population and a suboptimal population; updating individual positions of the empire butterfly of the high-quality population and the suboptimal population based on an optimized MBO algorithm; iterating the combined solution population based on a compound mutation operator to obtain a target solution population; wherein the combined solution population is generated by combining the updated high-quality population and the suboptimal population. According to the method, the evaporation waveguide height prediction accuracy and stability can be improved. The invention also discloses an evaporation waveguide height prediction device for radar sea clutter, detection equipment and a storage medium.

The application discloses a plate-tube type freezing evaporator in the technical field of refrigeration equipment, which comprises an evaporation plate and an evaporation pipe, the evaporation pipe is fixed on the evaporation plate, both ports of the evaporation pipe are located on the same side of the evaporation plate, a plurality of punching ports are arranged on the evaporation plate, the punching ports are oppositely arranged in pairs, a first folding edge is arranged at the opposite end of the opposite punching ports, the evaporation pipe is arranged on the inner side region opposite to the first folding edge, and the evaporation pipe can be arranged in a single-pipe independent fixing mode or a double-pipe parallel fixing mode in the inner side region, a second folding edge and a third folding edge are sequentially connected to the two sides of the evaporation plate, notches are arranged at the upper and lower ends of the second folding edge, and the two ports of the evaporation pipe penetrate the notches.

This invention relates to the field of aero-engine technology, disclosing a combustion assembly and an aero-engine. The invention includes: a flame tube; an evaporator tube comprising a main pipe and several branch pipes, one end of the main pipe forming an evaporator tube inlet, the branch pipes corresponding to the other end of the main pipe, and the ends of the branch pipes away from the main pipe forming several evaporator tube outlets, which are located within the flame tube; and a fuel supply structure connected to the evaporator tube inlet. This invention, by arranging the branched evaporator tubes in a blood vessel-like pattern on the flame tube, increases the probability of fuel breaking up upon impact with the wall under the action of the branched structure, resulting in better fuel atomization. Simultaneously, because the branched evaporator tubes have a larger contact area with the hot wall surface, they absorb more heat, thus allowing the fuel to be heated more fully, thereby evaporating more fuel and ultimately improving combustion efficiency.

The invention discloses a dual-mode low-emission combustion chamber matched with a standing vortex evaporation tube and a method. The combustion chamber comprises a multi-channel diffuser, an inner casing, an outer casing, a flame tube and a high-energy ignition electric nozzle. The flame tube comprises an outer ring wall plate, an inner ring wall plate, a single-concave-cavity structure, a cap cover, a cross flame supporting plate and M * N evaporation pipes. The trapped vortex combustion chamber is combined with two low-emission advanced combustion organization technologies of RQL and LPP, different combustion modes are adopted in different states or different areas in the whole flight cycle so as to adapt to the oil-gas ratios in different states, and the pollutant emission in the whole working condition range is reduced. And meanwhile, the M * N evaporation pipes can also be used for solving the problem that multiphase fuel oil is difficult to supply normally under the aviation kerosene phase state change caused by fuel oil regenerative cooling.

The application provides an air conditioning system and a control method thereof. The air conditioning system comprises a compressor, a condenser, a first evaporator, a second evaporator, a condensing pipeline and an evaporating pipeline. The condensing pipeline comprises a total condensing main pipeline and parallelly connected first and second condensing branch pipelines. The compressor is connected to the condenser. The condenser is connected to the first and second evaporators through the condensing pipeline. The evaporating pipeline comprises a total evaporating main pipeline and parallelly connected first and second evaporating branch pipelines. The first and second evaporators are both connected to the compressor through the evaporating pipeline. The horizontal height of the inlet of the first condensing branch pipeline is lower than that of the outlet of the first condensing branch pipeline.

The application relates to the technical field of aviation modified engines and discloses an annular backflow combustion chamber and an aero-engine. The annular backflow combustion chamber comprises an inner casing assembly, an outer casing assembly provided with a first nozzle mounting seat, a flame tube comprising an outer ring assembly and an inner ring assembly, an evaporation cavity assembly which is connected between the outer ring assembly and the inner ring assembly and is located at the head of the flame tube, and the evaporation cavity assembly is provided with a first nozzle hole; and an evaporation nozzle which is arranged in the outer casing assembly and the nozzle outlet of the evaporation nozzle is arranged in the evaporation cavity assembly. Compared with the mode that the evaporation pipe is arranged outside the outer ring of the flame tube, the evaporation cavity assembly of the application is connected between the outer ring assembly and the inner ring assembly of the flame tube and is located at the head of the flame tube, so that the evaporation cavity assembly is not affected by the limitation of the radial dimension of the combustion chamber, sufficient evaporation length and oil-gas mixing space can be ensured, fuel atomization and evaporation are more sufficient, and the combustion efficiency of the annular backflow combustion chamber is improved.

The utility model discloses an evaporative tube structure of ice maker, including evaporative tube and ice maker frame, and the spiral is formed in its inside through the ice maker frame to evaporative tube, and the inlet pipe and the outlet pipe of evaporative tube through the ice maker frame are arranged adjacently, and the wall of frame has big gap, and there are also two semicircular first small gaps in big gap for placing the inlet pipe and the outlet pipe of evaporative tube, still include briquetting, and the overall shape of briquetting is identical with big gap to can with big gap and is fixed through screw, and the second small gap of two semicircular of briquetting also has, and with first small gap one to one correspondence and is split into complete circular, and the circular of first small gap and second small gap split into and the inlet pipe and the outlet pipe of evaporative tube interference fit. The utility model discloses one side can fix evaporative tube on the frame, make it will not change position because of buoyancy etc.

A gas heat exchange device for micro direct current variable frequency air conditioner or fixed frequency air conditioner, comprising an evaporation pipe and a ventilation pipe arranged in the evaporation pipe and penetrating the evaporation pipe at both ends; a cavity for conveying refrigerant is formed between the inner wall of the evaporation pipe and the outer wall of the ventilation pipe, the first end of the evaporation pipe is provided with a capillary pipe in communication with the cavity, and the tail end of the evaporation pipe is provided with a conveying pipe in communication with the cavity. The present application can replace the traditional fin type evaporator, has high heat exchange efficiency, small volume and is suitable for small and micro air conditioners.

The invention discloses refrigeration equipment which comprises an inner container and an evaporation pipe wound on the periphery of the inner container, a storage chamber is defined by the inner container, the refrigeration equipment further comprises a temperature equalizing module arranged in the storage chamber, and the temperature equalizing module is connected with the inner container and exchanges heat with the inner container; the temperature equalizing module comprises a shell and an air duct formed in the shell, and an air outlet of the air duct is formed in the position, close to an opening of the storage chamber, of the shell. A first air guide part is arranged at the end, close to the opening of the storage chamber, of the air outlet, the included angle alpha between the air guide inclined face of the first air guide part and the first direction is an acute angle, and the first direction is the direction opposite to the opening direction of the storage chamber. According to the storage room, the uniformity of cold distribution in the storage room can be improved, and the effects of saving energy and preventing condensation of the door body are achieved.

The utility model discloses an evaporative pipe of inner surface heat exchange relates to refrigeration equipment technical field, the utility model discloses an evaporative pipe main part, heat exchange subassembly, heat conduction board and heat insulating sheet, the inner wall of evaporative pipe main part is fixed with heat exchange subassembly to be annular array, the periphery of evaporative pipe main part is fixed with the connecting piece, and the side of connecting piece away from evaporative pipe main part is fixed with heat insulating sheet, and the periphery symmetry of evaporative pipe main part is fixed with heat conduction board, and heat conduction board is away from heat insulating sheet and sets up, and the length direction of heat conduction board is same with the length direction of evaporative pipe main part.

An ice-making module having a flow-guiding function, relating to the technical field of ice makers. The ice-making module comprises: an evaporator assembly (1), wherein the evaporator assembly (1) is provided with an evaporation tube (12) and a plurality of ice-making cells (11); a flow-guiding plate (2), wherein the flow-guiding plate (2) is fixed on the evaporator assembly (1), the flow-guiding plate (2) is provided with a plurality of through-holes (21) and a plurality of flow-guiding blocks (22), the through-holes (21) are arranged corresponding to the ice-making cells (11), and the flow-guiding blocks (22) are arranged corresponding to the through-holes (21); and a water spray tube (3), wherein the water spray tube (3) is fixed above the flow-guiding plate (2), the water spray tube (3) is provided with a plurality of water spray holes (31), and the water spray holes (31) are arranged corresponding to the flow-guiding plate (2). During ice making, water is introduced from the outside into the water spray tube (3) and is sprayed out from the water spray holes (31). The water flows downward along the surface of the flow-guiding plate (2), accumulates at the top of a through-hole (21) under the action of a flow-guiding block (22), and flows into the interior of an ice-making cell (11) under the surface tension of the water and fills the entire surface of the ice-making cell (11). Part of the water flowing into the ice-making cell (11) freezes into ice, and the unfrozen water flows out from the ice-making cell (11), passes through the next flow-guiding block (22), and then flows into the next ice-making cell (11), until the water flows through the bottommost ice-making cell (11).

The utility model discloses a horizontal type shell pass falling film fluorine evaporation tube pass steam condenser, relates to the technical field of heat pumps, and aims to solve the problems that a fluorine system of an existing horizontal type steam condenser carries liquid when being started, reliable operation of a centrifugal compressor is not facilitated, and a vertical type steam condenser is low in heat exchange efficiency, low in cost and the like. According to the technical scheme, the vertical steam condenser comprises a barrel, the two ends of the barrel are fixedly connected with a first tube plate and a second tube plate respectively, and a plurality of internal and external reinforced efficient heat exchange tubes are fixedly connected between the first tube plate and the second tube plate; and the multiple internal and external reinforced efficient heat exchange pipes penetrate through the interior of the barrel side by side, and two falling film distributor end sealing plates are fixedly connected to the top of the inner wall of the barrel. The effects of being compact in structure, low in cost, higher in heat exchange efficiency and capable of preventing steam from being discharged before condensation are achieved.

The present invention discloses a high heat flux density base station environment cooling system and control method based on natural cold sources, including a natural cold source energy storage unit, a refrigeration unit circulation unit, an air cooling unit, and a refrigerant control unit. The natural cold source energy storage unit includes an air-cooled circulation pipeline passing through a phase change energy storage tank, and an air cooler and a first circulation pump are arranged on the air-cooled circulation pipeline. The evaporation pipeline of the refrigeration unit circulation unit passes through the phase change energy storage tank, and a cold supply circulation pipeline is arranged in the phase change energy storage tank. The cold supply circulation pipeline is connected to a refrigeration coil located at the base station air supply outlet through a second circulation pump. The air cooling unit includes a fan arranged at the base station air supply outlet. The refrigerant control unit includes a control module connected to the fan, the first circulation pump, the second circulation pump, and the refrigeration unit circulation unit, and the control module is connected to a temperature sensor unit. The present invention can make full use of natural cold sources to adjust the temperature of the base station and ensure the stability of the temperature in the communication base station at the same time.

The present invention discloses a falling film evaporator with enhanced heat exchange and uniform heating, belonging to the technical field of falling film evaporators, comprising a feed chamber, an evaporation tube and a liquid collecting chamber which are sequentially arranged and connected from top to bottom, a feed port is arranged on the top surface of the feed chamber, the evaporation tube comprises an evaporation tube shell and an evaporation tube inner core, the evaporation tube shell is fixedly connected to and connected with the feed chamber, a first air inlet and a second air inlet are symmetrically arranged on both sides of the top of the evaporation tube shell, an air outlet is arranged on one side of the bottom of the evaporation tube shell, and the evaporation tube inner core comprises a liquid distributor arranged in the evaporation tube shell. By symmetrically arranging the first air inlet and the second air inlet on both sides of the top of the evaporation tube shell, during the operation of the equipment, high-temperature steam collides after entering, and highly turbulent areas and vortex areas are generated inside the equipment. With the continuous entry of high-temperature steam, the areas generated by the two collisions greatly increase the heat exchange and the uniformity of the distribution of high-temperature steam between dense pipes.

The application discloses a regional evaporation duct prediction method based on path loss inversion, and relates to the technical field of maritime communication. A plurality of measured path losses corresponding to a plurality of propagation signals are obtained through a point-to-point microwave propagation link, and the plurality of measured path losses corresponding to the plurality of propagation signals are inverted to obtain long-time evaporation duct heights; the long-time evaporation duct heights and corresponding long-time meteorological and hydrological characteristics are taken as a training sample set to train a recurrent neural network to obtain an evaporation duct height prediction model; the meteorological and hydrological characteristics include a wind speed, an air temperature, a humidity, a sea surface temperature, an evaporation amount, an atmospheric pressure and a rainfall amount; an evaporation duct height prediction value of each grid point in a target region is predicted through the evaporation duct height prediction model; and a continuous regional evaporation duct height distribution is generated through inverse distance weighted interpolation according to the evaporation duct height prediction value of each grid point in the target region. The method improves the prediction accuracy of the regional evaporation duct.

The utility model discloses an even heat exchange air conditioner evaporator which comprises a frame and an evaporation pipe, an inlet is formed in one end of the upper portion of the frame, an outlet is formed in one end of the lower portion of the frame, and a sweeping mechanism used for sweeping dust on the surface of the evaporation pipe is arranged at one end of the side face of the frame. One end of the side face of the frame is provided with a flow gathering mechanism allowing airflow to evenly pass through, and one end of the side face of the sweeping mechanism is provided with a motor. According to the air conditioner, the evaporation pipe can make contact with airflow more evenly through the sweeping mechanism and the flow gathering mechanism, the situation that partial area is incomplete in refrigeration evaporation and the other area is excessive in evaporation is avoided, the refrigeration effect of the air conditioner is more even, dust on evaporation can be swept through the sweeping mechanism, and the air conditioner is more convenient to use. Dust is prevented from being accumulated on the evaporation pipe to affect the heat exchange rate, dust and bacteria are prevented from polluting indoor air through air conditioner circulating air, and the indoor air quality is guaranteed.

The utility model provides an indoor unit heat exchanger, an indoor unit and an air conditioner, relates to the technical field of air conditioners, and solves the technical problem that no heat exchanger structure matched with an axial flow fan exists. The indoor heat exchanger is a fin type heat exchanger and comprises an evaporation pipe set and heat exchange fins. The heat exchange fins are spirally arranged by taking the center of the indoor heat exchanger as the center; the evaporation pipe set is arranged in the multiple circles of heat exchange fins in a penetrating mode. The heat exchange fins are arranged to be of the spiral structure, air flow spirally flowing at the outlet of the axial flow fan passes through the heat exchanger without hindrance, wind resistance is reduced, and the problem that the flowing direction of the air flow at the outlet of the axial flow fan is not matched with that of the air flow of the heat exchanger is solved. Meanwhile, spiral flowing is beneficial to increasing the actual flowing distance of airflow passing through the heat exchanger, the heat exchange efficiency of the heat exchanger is improved, and the size of the heat exchanger is reduced with the same heat exchange amount; compared with a traditional evaporator, resistance is reduced by 35%, and the heat exchange effect is improved by 40%; the fins of the heat exchanger are integrated, so that the stamping process is reduced.

The invention discloses a gas distribution system and a gas distribution method, and relates to the technical field of gas detection.The gas distribution system comprises an evaporation pipe, a heating part and a gas bag, one end of the evaporation pipe is connected with a background gas storage part, and a liquid injection opening is formed in the pipe wall of the evaporation pipe; the heating part is used for evaporating liquid in the evaporation pipe into a gas state; a mixed gas inlet and a mixed gas outlet are formed in a bag opening of the gas bag, the mixed gas inlet is communicated with the other end of the evaporation pipe, and the mixed gas outlet is communicated with detection equipment through an exhaust pump; a mixed gas inlet valve is arranged at the mixed gas inlet, a mixed gas exhaust valve is arranged at the mixed gas exhaust port, and the gas bag is made of a flexible material and can be shrunk under the action of external air pressure in the exhaust process; the problem that volatile organic compound mixed gas is inconvenient to prepare by adopting a conventional method is solved, low-concentration gas can be flexibly prepared, and the problem that the gas distribution concentration is limited by the flow of a gas flowmeter is solved.

The invention belongs to the field of power ring main unit equipment and facilities, and provides an SF6 ring main unit internal operation environment adjusting mechanism, which comprises a secondary low-voltage chamber adjusting component and a cable chamber adjusting component, the secondary low-voltage chamber adjusting component comprises a rear cover, at least three groups of heat pipe assemblies, a transition pipe fitting, a bottom cover and a heat conduction piece, each heat pipe assembly comprises two evaporation pipes and one condensation pipe, the transition pipe fitting is used for introducing gas generated in the two evaporation pipes into the condensation pipe, the heat conduction piece comprises a heat conduction disc, one side of the heat conduction disc is provided with a heat conduction core column connected with the interiors of the evaporation pipes, and the other side of the heat conduction disc is provided with a plurality of contact pins; the cable chamber adjusting part comprises a cable winding roller, and the roller surface of the cable winding roller is used for dispersing and winding cables. According to the invention, the design is reasonable, no extra electric appliance is added, and especially no new air needs to be introduced into the secondary low-voltage chamber, so that dust cannot be attached to a bus device in a large area, heat dissipation is facilitated, the sealing performance is relatively good, the safety is relatively high, and the device is suitable for large-scale popularization.

The invention discloses an ice-making evaporator, which comprises an evaporator main body and an evaporator pipeline, a channel is arranged in the evaporator main body, the evaporator pipeline is two evaporation pipes which are mutually staggered and inclined, and the evaporation pipes are communicated with the channel in the evaporator main body to form a continuous circulation channel. The evaporation pipes are obliquely arranged in a staggered mode, the installation space is saved, compared with evaporation pipes vertically or horizontally arranged in parallel, a longer pipeline can be arranged in the same volume through oblique staggered arrangement, the flowing time of refrigerants in a channel is prolonged, the refrigerants have longer time for heat exchange in the channel, and the heat exchange efficiency of the refrigerants is improved. And the heat exchange efficiency of unit volume is improved.