117 results about "Ice binding" patented technology

The embodiment of the invention provides an automatic activation control method for an intelligent anti-icing and snow-removing control system, and the method comprises the steps: dividing an anti-icing and snow-removing heating region based on the real-time temperature and icing condition data of the surface of an airplane; when it is detected that the icing risk exists in the specific area, the heating device in the corresponding area is activated; dynamically adjusting the power of each heating area according to the environment condition and the flight state; and the working state of each heating area is recorded and analyzed, and the future partitioning strategy is optimized to improve the energy efficiency ratio. Through the scheme of the embodiment of the invention, the problem of how to intelligently partition the heating area to solve the balance problem between the energy consumption and the anti-icing efficiency can be solved.

The invention provides an anti-freezing optical cable freezing expansion pressure detection analysis method and system, and relates to the field of optical cable freezing prevention. The method comprises the steps of analyzing strain and deformation of a protection steel pipe and an optical cable in the protection steel pipe according to an optical cable structure and a protection steel pipe structure, and constructing a strain and deformation calculation model; through basic parameters of the optical cable and the protection steel pipe, calculating a cross sectional area variation by using a strain and deformation calculation model; constructing an optical cable pressure calculation model according to the relationship between the cross sectional area variations; analyzing the pressure caused by the icing layer in the protection steel pipe and a frost heaving strain theory, and constructing a frost heaving strain distribution model under the continuous icing layer condition; and according to the constructed optical cable pressure calculation model and the frost heaving strain distribution model under the continuous icing layer condition, frost heaving pressure calculation and related factor analysis of the internal material of the protection steel pipe are carried out. According to the method, influence factors of optical cable freezing damage are deeply analyzed, and guidance is provided for improving the anti-freezing design of the directly-buried optical cable.

The invention relates to the technical field of circulating water anti-freezing, and discloses a power plant circulating water anti-freezing system suitable for a cold region, and the system comprises a temperature sensing module, an anti-freezing heating module, a water flow disturbance module, an ice layer processing module, an intelligent regulation and control center and a fault safety module; when the circulating water system of the power plant operates in a cold region, the internal water temperature and external environment parameters of key nodes of a circulating water pipe network are monitored in real time, and a low-temperature early warning signal is generated based on a temperature field reconstruction algorithm of machine learning, so that abnormal temperature fluctuation can be recognized in time, early warning delay and false alarm caused by wind speed and humidity interference are avoided, and the working efficiency is improved. And in the circulating water anti-freezing process, the output power of the flexible electric heating body is dynamically adjusted through a graded heating mechanism, and the turbulence generator is linked to optimize water flow distribution, adapt to thermal inertia change of a pipeline and prevent the risk of local icing caused by sudden temperature drop.

The invention discloses a biological material supercooling storage system and a working method thereof. The biological material supercooling storage system comprises a sample carrier for storing and placing a biological material; the sample cavity is used for providing a subcooled storage environment of-30 to-5 DEG C for the biological material; the temperature control module is used for providing a controllable cooling rate for the interior of the refrigeration module, the cooling rate is greater than 2 DEG C / min in a temperature interval of above 5 DEG C, the cooling rate is 1-2 DEG C / min in a temperature interval of 0-5 DEG C, and the cooling rate is less than 1 DEG C / min in a temperature interval of below 0 DEG C; the electromagnetic excitation module is used for generating a low-frequency to very high-frequency 50Hz-300MHz electromagnetic field in the sample, and inhibiting the formation and growth of ice crystals in the sample by using the non-thermal effect of the electromagnetic field; the cooperative control module is used for achieving cooperative control over the cooling rate, the supercooling temperature and the electromagnetic field intensity so as to maintain long-term storage of the samples in a liquid state at the supercooling temperature, the storage temperature of the biological materials is reduced, meanwhile, the biological materials are not frozen, and liquid-state storage of the biological materials with different sources and different sizes at the low temperature can be achieved.

The utility model discloses a water delivery open channel anti-freezing system which is characterized by comprising a turbulent flow control device and a temperature detection module which are installed in a water channel, the turbulent flow control device comprises an impeller which is arranged in the upstream flowing direction, the lower end of the impeller is immersed below the water surface, and a rotating shaft of the impeller is connected with a main shaft through a belt mechanism. The main shaft is connected with a turbulence control motor, the temperature detection module is connected with the control center, and the control center is connected with the turbulence control motor. Water flow energy can be collected when the water temperature is high, turbulent fluctuation is generated when the water temperature is low, freezing prevention is achieved, water conveying efficiency reduction caused by water freezing is avoided, and water flow conveying stability and reliability of a water conveying open channel can be better guaranteed.

The utility model relates to a high-pressure water pump anti-freezing protection system and a high-pressure cleaning vehicle, the high-pressure water pump anti-freezing protection system comprises a water tank, a water pump, a three-way valve, a water outlet pipeline and an anti-freezing liquid tank, the water tank is communicated with a first inlet of the three-way valve, an outlet of the three-way valve is communicated with an inlet of the water pump, and an outlet of the water pump is communicated with the water outlet pipeline; the anti-freezing liquid tank communicates with a second inlet of the three-way valve. The high-pressure cleaning vehicle comprises the high-pressure water pump anti-freezing protection system. Compared with the prior art, the anti-freezing protection system for the high-pressure water pump is provided with the anti-freezing liquid tank, when the anti-freezing protection system is not used in winter, the pipeline and the high-pressure water pump are filled with anti-freezing liquid, the anti-freezing liquid has a lower freezing point and cannot be frozen in winter, and the pipeline and the high-pressure water pump are prevented from being damaged.

The utility model relates to an anti-ice-falling device for the surface of a cross tie beam of a bridge tower, which comprises a plurality of anti-ice-falling devices arranged on the surface of the cross tie beam, each anti-ice-falling device comprises an anti-ice-falling clamp, a plurality of raised fixing pieces and a plurality of extended connecting pieces, and the anti-ice-falling clamps comprise a first anti-ice-falling clamp and a second anti-ice-falling clamp. The first anti-ice-falling clamp and the second anti-ice-falling clamp are fixedly arranged on the edges of the left side and the right side of the cross tie beam respectively, and the first anti-ice-falling clamp and the second anti-ice-falling clamp are connected into a whole through the extending connecting pieces and the protruding fixing pieces and fixed to the upper surface of the cross tie beam. The limiting baffles arranged at certain intervals prevent solid accumulated ice from sliding on the upper surface of the bridge tower cross tie beam, meanwhile, lateral drainage of the upper surface of the cross tie beam cannot be hindered, the phenomenon that a traditional drainage channel becomes a'water blocking channel 'due to icing is avoided, and the size of a single block of ice accumulated on the upper surface of the cross tie beam is limited within a safety threshold value as much as possible.

1. The name of this design product: Vibrating anti-icer. 2. Purpose of this design product: to prevent the contact wire of the railway contact network from icing. 3. The design key point of this appearance design product lies in the shape. 4. The picture or photo that best illustrates the design points: three-dimensional picture.

This invention relates to the field of drying technology, specifically providing a compressor unloading control method for a dryer. The aim is to solve the problems of long unloading times during compressor unloading in existing dryers, leading to frost or even ice buildup on the external heat exchanger, and excessively high unloading frequencies causing performance degradation and reduced lifespan. To this end, the compressor unloading control method for a dryer of this invention includes: acquiring the compressor's operating current; comparing the compressor's operating current with the unloading current and the unloading exit current; and based on the comparison results, selectively controlling the dryer to enter different unloading modes or normal operation modes. This invention can select different unloading modes according to the compressor's operating current, reducing compressor unloading time compared to existing compressor unloading methods, improving the dryer's operational stability and baking quality, and extending its service life.

The invention relates to the technical field of anti-freezing materials, and discloses a bio-based environment-friendly pavement freezing inhibitor and a preparation method thereof, the bio-based environment-friendly pavement freezing inhibitor is prepared from the following raw materials by weight: 20-30 parts of a bio-based anti-freezing agent, 10-15 parts of an organic acid salt, 12-18 parts of polyol, 10-15 parts of a functional auxiliary agent, 6-12 parts of a synergistic auxiliary agent, 5-10 parts of a bio-based corrosion inhibitor, 15-30 parts of a bio-based filler and 30-40 parts of deionized water. The preparation method comprises the following steps: S1, mixing the bio-based antifreeze agent, the organic acid salt, the polyol, the functional additive and the synergistic additive; s2, uniformly spraying the bio-based slow-release agent solution on the surface of the mixed material through an atomizing nozzle; and S3, mixing the bio-based filler, the coated product and deionized water, drying, and crushing to obtain the bio-based environment-friendly pavement freezing inhibitor. The anti-icing device is suitable for anti-icing operation in winter in cold region roads, airports, bridges and other scenes.

The anti-icing automatic defrosting system comprises an evaporator, an expansion valve, a drying bottle, a compressor, a condenser, a heat storage device, an electromagnetic four-way valve, an air outlet and an electric controller, and the evaporator, the expansion valve, the drying bottle, the compressor, the condenser, the heat storage device and the electromagnetic four-way valve are connected through pipelines. The inner walls of the two opposite sides of the heat storage device are connected with a first air inlet pipe, a second air inlet pipe and a heat exchange pipe correspondingly, the first air inlet pipe is connected with the air outlet, an air pump is installed on the first air inlet pipe, and the second air inlet pipe communicates with a pipeline between the compressor and the evaporator. Part of the outer wall of the heat exchange pipe is sequentially attached to the evaporator, the pipeline between the evaporator and the condenser and the outer wall of the condenser. The anti-icing automatic defrosting system of the heating ventilation air conditioner heat pump unit has the effects that the heat loss in a room can be reduced, and defrosting of multiple parts in an air conditioner can be synchronously achieved.

Horizontal tube falling film freezing switching melting ice source heat pump drives multi-effect desalination: the ice source heat pump evaporator provides antifreeze closed-loop cooling capacity, driving multiple sets of horizontal tube falling film freezing heat collectors to extract the falling film freezing latent heat of the open-loop brine flow in parallel, realize multi-effect freezing separation of ice layer and brine, and provide ice storage air conditioning in summer; the condenser provides closed-loop heat, a small amount of which switches to provide the latent heat of melting ice on the inner surface of the ice layer of each set of heat collectors, forcing the remaining ice layer to fall by its own weight, crushed ice, separated by wire mesh and centrifugal separation, while most of it drives the heating cycle and realizes brine concentration simultaneously. The efficient solar energy supplementary heat 0℃ ice melting provides a continuous heat source.

The utility model relates to composite spiral mesh belt conveying equipment. The problems that due to the fact that a spiral track is iced or serious oil accumulation exists in the track, local deformation of a rotary drum is too large, serious mechanical faults such as off tracking, belt stacking, belt turning and even belt tearing and breaking happen to a conveying belt, and the production efficiency is greatly influenced are solved. Oil dirt and stains are accumulated on an inner guide rail, cleaning is difficult, great friction force is generated when the guide rail makes contact with a mesh belt, the operation power is increased, and meanwhile sanitation and safety of food are affected. According to the technical scheme, the self-supporting mesh belt conveyor is composed of a self-supporting main transmission mechanism, an auxiliary conveying mesh belt mechanism and an auxiliary belt returning mechanism. The food conveying device is suitable for conveying quick-frozen food and steamed and baked food.

The present invention relates to a cold station and an antifreeze method thereof, wherein the cold station comprises: a chiller, comprising a condenser and an evaporator; a first fluid circulation component, forming a cooling water circulation path with the condenser; a second fluid circulation component, forming a refrigerated water circulation path with the evaporator; and a heat storage and release component, comprising a water tank, a first and a second pipeline, the water tank being configured to keep the water preset therein warm; the two ends of the first pipeline being respectively connected to the cooling water circulation path, a part of the first pipeline between the two ends being arranged in the water tank, the two ends of the second pipeline being respectively connected to the refrigerated water circulation path, a part of the second pipeline between the two ends being arranged in the water tank; wherein the heat storage and release component is configured to absorb and store heat in the cooling water circulation path through the water tank when the chiller is running, and to release heat to at least one of the refrigerated water circulation path and the cooling water circulation path through the water tank when the chiller stops running. The present invention is used to alleviate the problem of ice formation inside the pipeline.

This utility model relates to an antifreeze device for water supply and drainage pipes, and pertains to the field of water supply and drainage engineering. The water supply and drainage pipe body of this technical solution is protected from freezing by an antifreeze component. The antifreeze component includes a water tank, one side of which is connected to the first end of the input pipe, and the other side of which is connected to the second end of the output pipe. A set of heating blocks is installed inside the water tank, and a microcontroller is mounted on its outer surface. A pump is also included, with its input end connected to the second end of the input pipe and its output end connected to the first end of the output pipe, and is electrically connected to the microcontroller. The output pipe is wound around the water supply and drainage pipe body, and is divided into a front half and a rear half. The rear half of the output pipe is further equipped with a secondary heating component electrically connected to the microcontroller. In this configuration, the cooperation between the antifreeze component and the water supply and drainage pipe body significantly improves the stability of the antifreeze effect, effectively prevents the medium inside the pipe from freezing, and ensures the normal operation of the water supply and drainage system.

The present application relates to a freeze protection control method and device for a gas water heater, wherein the freeze protection control method includes: when detecting that the gas water heater meets preset freeze protection start conditions, obtaining the average water flow rate of a water pump at a first preset power and a first operating time; determining the number of water pump operations based on the pre-stored water storage volume of the gas water heater, the first operating time, and the average water flow rate; determining the operation interval duration of the water pump based on the first operating time, the average water flow rate, and a preset unit water flow rate; controlling an electric heating device to heat according to a preset heating power, and controlling the water pump to operate according to the first preset power, the operating interval duration, the first operating time, and the number of operations during the heating period of the electric heating device, so that the temperature of the stored water is increased by a preset temperature rise value when the water pump operation ends. The embodiments of the present application can prevent the stored water in the gas water heater from freezing in a low temperature environment.

The utility model relates to the technical field of surface air coolers, in particular to an anti-freezing mechanism of a surface air cooler, which comprises a surface air cooler radiating fin, an air heater, an internal heat conduction pipe, an air return pipe and a pipeline positioning plate, and an upper mounting plate and a lower mounting plate are respectively arranged at the top and the bottom of the surface air cooler radiating fin. An air heater is mounted at one end of the top of the upper mounting plate; the air outlet end of the hot-air blower is connected with an air inlet pipe, the air inlet end of the hot-air blower is connected with an air return pipe, an internal heat conduction pipe is embedded in the surface air cooler radiating fins, the air inlet end of the internal heat conduction pipe is communicated with the air inlet pipe through a bent pipe, and the air outlet end of the internal heat conduction pipe is communicated with the air return pipe through a bent pipe; the surface air cooler is provided with a mechanism for carrying out anti-freezing protection on the surface air cooler, the phenomenon that residual water is generated in the pipeline in the surface air cooler to be frozen can be avoided, and the service life of the pipeline in the surface air cooler is prolonged.

Provided is a power plant cooling tower bottom windshield curtain system with an anti-freezing heating device. The utility model relates to a wind shielding curtain system on a cooling tower of a power plant. The problem that a curtain body cannot ascend and descend due to freezing at a track is solved. The device comprises a plurality of curtain windproof units, each curtain windproof unit comprises two lifting guide rails, a curtain body, a curtain folding driving device and a plurality of cross beams, the cross beams are fixed to the surface of the curtain body in parallel, and the two ends of each cross beam are arranged in the corresponding lifting guide rail in a sliding fit mode; the first energy conversion device is used for diffusing heat energy into the lifting guide rail; and the power transmission and distribution system is connected with the first energy conversion device and transmits electric energy to the first energy conversion device. The temperature of the lifting guide rail of the anti-freezing heating device is always above zero, so that water vapor cannot be condensed into ice at the lifting guide rail, and the problem that the curtain body cannot be folded and fall down due to freezing at the lifting guide rail is solved.

The invention relates to an anti-freezing solution based on 2-methyl-1, 3-propylene glycol and a preparation method of the anti-freezing solution. The formula of the anti-freezing solution comprises the following components in percentage by weight: 10-80% of a first component 2-methyl-1, 3-propylene glycol; the second component is 10%-80% of a hydrogen bond acceptor compound; 0.5%-2% of a scale and corrosion inhibitor; 5%-10% of a pH buffer agent; 2%-5% of a coloring agent; and 0.5%-1% of a defoaming agent. The preparation method comprises the following steps: mixing the components in proportion, heating at the temperature of 30-150 DEG C, stirring for 0.1-24 hours, and dissolving to obtain the product. The anti-freezing solution prepared by the invention is applied to the field of engine anti-freezing solutions, can resist corrosion and scale, is anti-freezing at low temperature, is resistant to high temperature, is not easy to burn and explode, has the thermal decomposition temperature of 90 DEG C or above, can ensure the original component concentration of the anti-freezing solution for a long time, does not need to be additionally supplemented and added, and can still keep the anti-freezing solution not frozen at the temperature of-60 DEG C or below; and the paint is nontoxic and harmless, has extremely low metal corrosion, and can be placed for a long time.

The utility model discloses a cold region sewage pretreatment self-heating anti-freezing grid which comprises a main body assembly, and the main body assembly comprises a coarse grid, a limiting frame, a guide column, a fine grid and a pressing ring; the limiting frame is fixedly connected to the rear surface of the thick grid, and the outer side wall of the thin grid is attached to the inner side wall of the limiting frame. According to the utility model, the fine grid is designed into a split structure, so that the electric heating wire can be conveniently mounted, and the sealing ring is arranged between the two grid plates, so that sewage can be prevented from entering the fine grid to corrode the electric heating wire; through cooperation of structures such as a pressing ring, a guide column and a locking nut, the fine grille and the coarse grille can be tightly attached, and heat transfer is facilitated; when the electric heating wire works, heat is transferred to the surface of the grating plate, and the grating plate transfers the heat to the coarse grating, so that the condition that the surface of the grating is frozen can be avoided, a grating opening cannot be blocked by ice bodies and frozen impurities, and the water passing capacity of the grating is guaranteed.

The utility model discloses an anti-icing evaporator of a refrigeration house in the technical field of refrigeration house refrigeration equipment. The anti-icing evaporator comprises an evaporation box body and a circulating device, the evaporation box body is provided with a hollow heat exchange cavity. The front side and the rear side of the evaporation box are provided with an air outlet and an air inlet communicating with the heat exchange cavity correspondingly. The circulating device is arranged in the heat exchange cavity and comprises a plurality of heat exchange pipes, a spraying device used for spraying an anti-freezing solution is arranged above the circulating device, a recovery opening is formed in the lower end of the evaporation box body, and the recovery opening is communicated with the spraying device through a circulating pump. According to the anti-icing evaporator for the refrigeration house, the anti-freezing solution is sprayed to the heat exchange pipe of the circulating device through the spraying device, and condensed water is taken away through the anti-freezing solution with the low freezing point, so that ice blocks or frost are prevented from being formed on the surface of the heat exchange pipe.

The utility model discloses a cold liner anti-freezing structure of a tea purifying and drinking bar machine, which comprises a purifying and drinking machine main body, a cold liner and an ice-making module are arranged in the purifying and drinking machine main body, the ice-making module comprises a water return bin and an ice-making box, the ice-making box is arranged in the water return bin, the cold liner is provided with a first refrigeration evaporator, and the ice-making box is provided with a second refrigeration evaporator. The water purifying and drinking machine body is further provided with a compression refrigeration module used for providing refrigerants for the first refrigeration evaporator and the second refrigeration evaporator. The cold container is provided with a circulating pump, the water inlet end of the circulating pump is connected with the cold container, the water outlet end of the circulating pump is connected with the ice making box, a water return structure is connected between the water return bin and the cold container, and water in the water return bin flows back to the cold container through the water return structure. The device has the effects of high cold water preparation efficiency and effective prevention of freezing of the cold liner.

The utility model discloses a heat tracing band drainage structure for preventing water seepage and frost heaving of a tunnel lining. The heat tracing band drainage structure comprises a drainage pipe embedded in the inner wall of a tunnel, two electric heat tracing bands and a plurality of binding assemblies. The two electric tracing bands are symmetrically attached to the drainage pipe, the multiple binding assemblies are arranged on the drainage pipe at intervals, and the binding assemblies are used for symmetrically attaching the two electric tracing bands to the drainage pipe; the bearing plate and the two first limiting strips form a first limiting groove, and the elastic belt and the two second limiting strips form a second limiting groove; when the binding assembly is connected to the drainage pipe in a sleeving mode, one electric tracing band is located in the first limiting groove, and the other electric tracing band is located in the second limiting groove. According to the utility model, the drainage pipe can be uniformly heated, so that the phenomenon of freezing blockage caused by water seepage in the drainage pipe can be quickly eliminated, and meanwhile, the phenomenon of tunnel lining damage caused by frost heaving damage of the drainage pipe is avoided; in addition, rapid assembly of the electric tracing band is also realized.

The embodiment of the invention provides a method and device for determining a frost heaving prevention result of a concrete pipe pile. The method comprises the steps that the lowest environment temperature of an area where the concrete pipe pile is located and the temperature of accumulated water in an accumulated water containing cavity are obtained; according to the temperature of the accumulated water, the allowed total heat transfer amount of the accumulated water is determined; according to the lowest environment temperature, the temperature difference between the accumulated water freezing point temperature and the lowest environment temperature is determined; according to the temperature difference and the thicknesses of the first plugging plate, the air interlayer and the second plugging plate, the heat transfer speed of the concrete pipe pile is determined; according to the accumulated water allowable total heat transfer amount and the heat transfer speed, the time needed by freezing is determined; and comparing the time required for freezing with set time to obtain a frost heaving prevention result. According to the embodiment of the invention, the first plugging plate, the second plugging plate and the air interlayer are arranged, an efficient heat insulation layer is formed by utilizing the extremely low heat conductivity coefficient of air, heat conduction of external low temperature to the accumulated water containing cavity is remarkably reduced, and accumulated water is prevented from being frozen.

The invention discloses an anti-freezing type efficient air temperature heat exchanger for circulating water cooling, and belongs to the technical field of air temperature heat exchangers. An elastic sensing diaphragm is arranged to serve as a triggering element of an icing state, and only when circulating water in a star-shaped heat exchange pipe is frozen and expands, the elastic sensing diaphragm can sense the icing state; the heat transfer core is driven to make contact with the phase change heat storage material in the heat storage pipe through the hydraulic effect, a heat transfer path is conducted, ice melting protection is conducted on the icing position in a targeted mode, in the normal operation state, the heat transfer core is located in the heat insulation sleeve and keeps isolated from the heat storage material, and only little heat is transferred to the heat exchange pipe, so that the ice melting protection is achieved. The normal working temperature of circulating water is not changed, the heat exchange efficiency of the heat exchange pipe and an external medium is not affected, the anti-freezing function and the heat exchange function are not interfered with each other, solar energy is collected through photo-thermal conversion from a heat source, and the solar energy is converted into heat energy to be stored. The problems that energy is wasted and heat exchange is interfered in a traditional continuous heating scheme are solved.

The utility model relates to the field of water conservancy and hydropower engineering, in particular to an anti-freezing water level monitoring device for water conservancy and hydropower engineering. The technical problems that in the using process of a monitoring device, the monitoring device cannot be flexibly adjusted according to actual using requirements, and a monitoring head does not have a heating function, so that accurate data monitoring cannot be carried out in low-temperature or frozen water are solved. According to the technical scheme, the anti-freezing water level monitoring device for the water conservancy and hydropower engineering comprises a supporting bottom plate and further comprises a lifting assembly, an expansion assembly and a monitoring assembly. By arranging the lifting assembly, the height of the device can be conveniently adjusted according to use requirements, then through the expansion assembly, an expansion rod can drive the monitoring assembly to move front and back for adjustment, and through the monitoring assembly, the height of the heating monitoring head is adjusted through a pull rope. And the heating monitoring head can be effectively prevented from being frozen in a cold environment, and normal work and accurate monitoring of the device are ensured.

The utility model discloses a railway fire water supply pipeline anti-freezing device which comprises a first protective sleeve and a second protective sleeve, the first protective sleeve and the second protective sleeve are semicircular rings, a connecting structure is arranged between the first protective sleeve and the second protective sleeve, heat preservation layers are arranged in the first protective sleeve and the second protective sleeve, heating assemblies are arranged on the two sides of the heat preservation layers, and the heating assemblies are connected with the first protective sleeve and the second protective sleeve. A slot is formed in one end of the protective sleeve I; the beating structure is connected to the inner side of the protective sleeve I; one end of the insertion strip is slidably connected to the interior of the protective sleeve II; the limiting structure is connected to the interior of the second protective sleeve. Compared with the prior art, the device has the advantages that the device not only can be conveniently fixed on the surfaces of fire-fighting water supply pipes with different sizes, but also can crush ice.

The present invention relates to the field of waterproof detection technology, and discloses a demisting heat dissipation module and a camera. The demisting heat dissipation module comprises: a shell and a refrigerator; the refrigerator is located in the shell, the refrigerator has a cold end and a hot end, the shell is provided with a transparent window, and the hot end is thermally connected to the transparent window. In the above-mentioned demisting heat dissipation module, the refrigerator absorbs and conducts the heat near the cold end to the hot end, and then conducts it to the transparent window. On the one hand, the heat inside the shell is promptly dissipated through the transparent window. On the other hand, whether it is cold end refrigeration or external low temperature environment, it is easy to cause condensation on the transparent window to form water mist or frost. By heating the transparent window, the formation of the above-mentioned water mist or frost can be prevented in advance to affect the normal operation of the camera. Alternatively, when the temperature is too low, the hot end heats the transparent window to heat and melt the ice that has been formed. The above-mentioned structure can simultaneously use the refrigerator to dissipate heat inside the shell, and use the heat of the hot end of the refrigerator to de-ice or prevent ice formation.

The application relates to the technical field of aero-engine testing, and discloses an air inlet dustproof mesh cover assembly and a high-altitude simulation test bench. The air inlet dustproof mesh cover assembly comprises: an air inlet dustproof mesh cover which comprises a support framework and a mesh cover main body covering and fixed outside the support framework, the support framework is internally provided with a hollow air inlet channel, and the support framework is provided with a blowing hole for blowing air to the mesh cover main body; and a pneumatic defrosting device which is suitable for continuously feeding air into the air inlet channel and blowing air to the mesh cover main body through the blowing hole. Through the pneumatic defrosting device, the ice and frost on the mesh cover main body can be removed in real time, the screen mesh of the mesh cover main body can be dredged, and the phenomenon of frost blocking the mesh holes can be reduced or avoided, manual defrosting is not needed, the test is not interrupted, the icing test efficiency is improved, the energy consumption is reduced, the test continuity is ensured, the problems of frost blocking the mesh holes of the existing air inlet dustproof mesh cover and manual defrosting needing to pause the test are effectively solved.

The utility model relates to the technical field of water heaters, in particular to an anti-freezing water heater which comprises a shell, a heat exchanger is arranged in the shell, a water inlet pipe and a water outlet pipe are communicated on the heat exchanger, the water inlet pipe extends to the outer side of the shell, a ventilation pipeline is arranged on the water inlet pipe, and a water outlet pipe is arranged on the ventilation pipeline. An air inlet pipeline is detachably connected to the ventilation pipeline, the water heater further comprises an external fan, an air outlet of the external fan directly faces the air inlet pipeline, after the water heater is used, air is supplied to the air inlet pipeline through the external fan, the problems of water accumulation and freezing in the pipeline can be solved, the internal space of the water heater is not occupied, and the water heater is convenient to use. The occupied space of the water heater can be reduced, the fan is easy to replace, and the maintenance cost is low.