13results about How to "Prevent frost cracking" patented technology

The application relates to the technical field of heat pumps, in particular to a fluorine cooling and water cooling coupled heat dissipation driving plate system, which comprises a compressor, a first heat exchanger, a second heat exchanger, a first electronic expansion valve and a driving plate radiator, one end of the compressor is communicated with one end of the first heat exchanger, the other end of the compressor is communicated with one end of the second heat exchanger, the other end of the first heat exchanger is communicated with the other end of the second heat exchanger, the first electronic expansion valve is connected in series in a passage communicated between the first heat exchanger and the second heat exchanger, and a water inlet pipe of the first heat exchanger, the driving plate radiator and a water outlet pipe of the first heat exchanger are communicated in sequence. The fluorine cooling and water cooling coupled heat dissipation driving plate system can overcome the low heat exchange efficiency of the existing fluorine cooling heat pump unit, can improve the heat exchange efficiency under the condition that the ambient temperature is relatively low, can reduce the waste of resources, and can improve the energy-saving economy of the system.

The water path structure comprises a first filter element, a raw water path, a pure water path and a waste water path, one end of the raw water path is communicated with a raw water opening, the other end of the raw water path is communicated with a water inlet of the first filter element, a water inlet valve and a booster pump are arranged on the raw water path, and the booster pump is located between the water inlet valve and the first filter element; the pure water path is communicated with a pure water outlet of the first filter element; the wastewater path is communicated with a wastewater outlet of the first filter element, and an air inlet valve is arranged on the pure water path, so that external air can enter the pure water path; the water path structure further comprises an emptying water path, the water inlet end of the emptying water path is connected with the pure water path, the water outlet end of the emptying water path is connected with the raw water path, and an emptying valve is arranged on the emptying water path. The waterway structure and the water purifier can effectively prevent the problem of frost crack of the filter shell caused by freezing of water retained in the waterway and the filter element in a low-temperature environment, are reliable in operation, and do not influence the normal work of the whole machine.

This utility model relates to a leak-proof and freeze-proof structure for furnace top water supply, including a leak-proof and freeze-proof pipe. The leak-proof and freeze-proof pipe includes a connecting section and a drain section. Two connecting sections are directly connected and respectively disposed at both ends of the drain section. There is a pipe diameter between the two connecting sections that allows for straight-line connection, ensuring that the water flow has low resistance during use and can converge to the lowest point during draining. The two ends of the connecting section are respectively connected to the main water supply pipe through a first solenoid valve and a second solenoid valve. The drain section includes a first drain pipe that slopes downward from both ends toward the middle. The bottom surface of the first drain pipe is lower than the bottom surface of the connecting section. A second drain pipe is disposed at the lowest point of the drain section. The second drain pipe slopes downward and connects to the return water tank, and a third solenoid valve is disposed at its end. This application prevents leakage into the furnace and affects the furnace condition by setting up a leak-proof and freeze-proof pipe, while also preventing the water from freezing and causing the pipes and valves to crack.

This utility model relates to the field of vehicle-mounted home appliance technology and discloses a vehicle-mounted water dispenser, including a four-way connector. A water pipe is fixedly connected to one end of the inner wall of the water tank. A cold water pump is fixedly connected to the other end of the water pipe. The cold water pump is fixedly connected to a cold water valve via a water pipe. The cold water valve is fixedly connected to the four-way connector via a water pipe. Each of the four ends of the four-way connector is fixedly connected to a water pipe. The four-way connector is fixedly connected to one end of a three-way solenoid valve via a water pipe. One end of the three-way solenoid valve is fixedly connected to one end of a water pipe, and the other end of the three-way solenoid valve is fixedly connected to a water tank. In this utility model, when cold water is needed, the cold water pump draws water from the water tank, which flows sequentially through the cold water valve, water pipe to the four-way connector, then through the three-way solenoid valve, water pipe, and three-way adapter, before flowing out from the outlet pipe. This ensures the water dispenser can be used stably throughout the year and solves the problem of water pipes freezing and cracking due to water expansion during low winter temperatures.

The application provides a heat preservation rubber tube, which is a modified nitrile rubber heat preservation rubber tube; the outer side of the tube wall of the heat preservation rubber tube is provided with a heat preservation layer with air holes. In the vulcanization process, micro air holes are formed, a heat preservation layer with low heat transfer effect is formed on the outer layer of the rubber tube, the air movement in the bubbles is seriously hindered, and the 'convective heat conductor' effect formed by the micro holes on the rubber material prevents the air from flowing, thereby preventing the heat transfer and achieving good heat preservation effect and avoiding the rubber tube from being frozen and cracked. The application effectively avoids the limitation of rubber material selection, avoids the multi-stage processing of the rubber material, improves the production efficiency, achieves the heat preservation effect through the microstructure change after the vulcanization of the rubber material, and is more convenient to operate. The preparation process provided by the application is simple, the conditions are mild, and the controllability is strong, so that the application is more conducive to industrialization promotion and application.

The invention discloses a fuel cell solid hydrogen storage thermal management circulating system and a control method, and belongs to the technical field of fuel cell thermal management and hydrogen storage. The system comprises a high-pressure hydrogen source, a solid-state hydrogen storage auxiliary heat source device, a fuel cell stack, a heat exchange mechanism, a pipeline switching unit and a controller, wherein the controller is in signal connection with each component and performs staged control; the control method depends on the system, in the starting stage, high-pressure hydrogen is controlled to enter the solid-state hydrogen storage auxiliary heat source device to absorb hydrogen and release heat to preheat an electric pile, the engine heating time is 1-10 min, and the temperature of the electric pile is increased to 310-340 k; in the normal operation stage, the stack waste heat is used for driving the solid hydrogen storage auxiliary heat source device to absorb heat and release hydrogen and supply hydrogen to the stack, and external heat supply is not needed; in the shutdown stage, high-pressure hydrogen is introduced again to enable the solid hydrogen storage auxiliary heat source device to absorb hydrogen and release heat, residual water vapor blowing and freezing prevention are carried out on the galvanic pile for 0.5-5 min, and the solid hydrogen storage auxiliary heat source device can be widely applied to fuel cell vehicles, engineering machinery, ships and fixed power stations.

The invention relates to the technical field of faucets, in particular to a modular faucet which comprises a faucet pipe body, an adjusting assembly is arranged on the surface of the faucet pipe body and comprises a connecting pipe connected to the water inlet end of the faucet pipe body, and a rectangular box is arranged above the connecting pipe; the rectangular box is communicated with the connecting pipe through a branch pipe, a rectangular cover is fixedly connected to the top of the rectangular box, a sealing piston is slidably connected to the interior of the rectangular cover in a sealed mode, and a longitudinal plate is fixedly connected to the top of the sealing piston; when a pipeline is locally frozen, water pressure in the connecting pipe changes, a sealing piston and a longitudinal plate are driven to move downwards, an optical shaft transversely moves along an inclined sliding groove, a first motor or a second motor of an auxiliary assembly is triggered to operate, a hollow plate is driven to move, and therefore a wrench is driven to rotate a valve element, the water outlet flow is automatically increased or decreased, and high-speed water flow can wash and melt ice blockage; normal circulation of the pipeline is recovered, and frost cracking of the pipeline is effectively prevented.

The utility model belongs to air conditioning ventilation technical field, concretely relates to a kind of energy-saving air conditioning ventilation device, including filter mechanism and split heat recovery mechanism, the side of filter mechanism away from split heat recovery mechanism is fixedly connected with pipeline one, the side of split heat recovery mechanism away from filter mechanism is fixedly connected with pipeline two, and one side of pipeline two fixed on the split heat recovery mechanism is equipped with circulating pipeline, the side of pipeline two away from circulating pipeline is equipped with shunt pipeline, and the connecting place of pipeline two inside close to pipeline two and shunt pipeline is equipped with heat exchange mechanism, the utility model can control the path of the new air inhaled and the operation of split heat recovery mechanism by the value of indoor and outdoor temperature difference according to different seasonal conditions by multiple temperature sensors detecting the air temperature of different regions.

This application belongs to the technical field of aluminum-plastic door and window profiles, and discloses an aluminum-plastic door and window profile with enhanced wind pressure resistance, including a top plastic profile, a middle aluminum profile, and a bottom plastic profile. The bottom of the top plastic profile has a middle aluminum profile at its bottom, and the bottom plastic profile has a bottom plastic profile at its bottom. A support block is provided inside the top plastic profile, and the support block has several equidistantly distributed pressure-resistant grooves inside. A connecting component is provided between the top plastic profile and the middle aluminum profile, and a support component is provided between the middle aluminum profile and the bottom plastic profile. Baffles are provided on both sides of the top of the bottom plastic profile. This application enhances the connection strength between the top plastic profile and the middle aluminum profile by providing connecting components, and enhances the connection strength between the bottom plastic profile and the middle aluminum profile by providing support components, thereby improving the wind pressure resistance and strength of the aluminum-plastic door and window, and increasing the stability and service life of the door and window.

The application provides a freeze-proof system and method of a heat pump unit and the heat pump unit. The freeze-proof device is arranged on a pipeline connected with a plate heat exchanger and a fin heat exchanger, and whether the refrigerant flows through the freeze-proof device for preheating is controlled according to the temperature of the liquid refrigerant in the liquid refrigerant pipeline of the plate heat exchanger, so that the temperature of the liquid refrigerant entering the plate heat exchanger in the defrosting mode is improved, the plate heat exchanger is prevented from being frozen and cracked, and the safety of system operation is improved.

This invention discloses a nanocomposite phase change antifreeze water-reducing agent and its preparation method, comprising water and the following components in parts by weight: 5-8 parts polycarboxylate superplasticizer mother liquor, 6-10 parts ethylene glycol, 8-10 parts calcium formate, 2-4 parts sodium nitrite, 5-8 parts methanol, 2-5 parts sodium metasilicate, 1-2 parts sodium thiocyanate, 0.3-0.6 parts air-entraining agent, 6-8 parts modified nano titanium dioxide, and 8-10 parts ternary phase change material. This nanocomposite phase change antifreeze water-reducing agent is a composite functional admixture that introduces nanomaterials and phase change materials into traditional antifreeze water-reducing agents. It not only prevents concrete from freezing at low temperatures but also regulates the internal temperature changes of concrete through "phase change" characteristics, thereby improving the durability of concrete under freeze-thaw cycles.

The utility model provides a low-temperature-resistant frost-crack-resistant wire and cable, which relates to the technical field of wires and cables and comprises a heat-insulating layer, an isolating layer for protecting the heat-insulating layer is arranged on the surface of the heat-insulating layer, and a sizing anti-freezing net made of insulating materials is arranged on the surface of the isolating layer. And a reinforcing sleeve for supporting and protecting the shaping anti-freezing net is arranged on the surface of the shaping anti-freezing net. The advantages of the utility model are that the surface of the wire cable formed by the conductive wire core and the insulation protection sleeve is provided with the thermal insulation layer to carry out thermal insulation protection on the inside, and the shaped anti-freezing net is arranged to carry out reinforcement protection on the shaped thermal insulation layer; the overall stability and connectivity of the heat-preservation and anti-freezing structure of the electric wire and cable are enhanced through the connection between the reinforcing sleeve and the shaping anti-freezing net, meanwhile, the slotted hole structure in the shaping anti-freezing net can be used for intercepting permeating water to a certain degree, and it is avoided that the surface of the electric wire and cable is frozen to damage a heat-preservation layer of the electric wire and cable; and the thermal insulation performance of the wire cable can be effectively improved.

The application provides a freezing prevention device and a compressor, which comprise an evaporator, the evaporator having a plurality of heat exchange pipes for circulating refrigerant; the plurality of heat exchange pipes are arranged at intervals; a blocking component is connected with the evaporator, the blocking component has a containing cavity and an inlet and an outlet communicated with the containing cavity, the inlet is arranged corresponding to the water outlet of each heat exchange pipe, so that the fluid in the plurality of heat exchange pipes flows out from the outlet after passing through the containing cavity; the containing cavity comprises a circulation cavity for the fluid in the heat exchange pipe to flow through and a storage cavity communicated with the circulation cavity, the storage cavity is located below the circulation cavity; a measuring device is arranged in the circulation cavity, and the measuring device is used for measuring the volume of the fluid in the storage cavity. The freezing prevention device and the compressor solve the technical problem that the icing of the pipeline in the compressor is not easy to be found in the related art.