36results about How to "Achieve antifreeze effect" patented technology

The invention discloses a concrete early strength agent and a preparation method thereof. The concrete early strength agent is prepared from the following components in parts by weight: 1-3 parts of sodium chloride, 1-3 parts of sodium nitrite, 10-20 parts of sodium sulfate, 3-6 parts of calcium chloride, 2-6 parts of urea, 5-15 parts of methacrylic acid, 1-3 parts of silane, 1-5 parts of calcium gluconate, 1-5 parts of triisopropanolamine, 5-10 parts of fatty glyceride, 50-80 parts of polycarboxylate superplasticizer and 2-4 parts of finely grinded cement stone. The concrete early strength agent has the beneficial effects of rapidly drying concrete even in a low-temperature environment.

The invention discloses a freeze-resistant type heat exchanger with a three-dimensional air cavity. The freeze-resistant type heat exchanger with the three-dimensional air cavity comprises a shell-and-tube type heat exchanger body and a plurality of concentric circular rings, wherein, the concentric circular rings are formed by the method that a multi-circuit parallel connection metal pipe is winded in the shell-and-tube type heat exchanger body, the concentric circular rings are mutually connected from big to small, and the adjacent circular rings are separated through sleeves. The freeze-resistant type heat exchanger with the three-dimensional air cavity has the beneficial effects that the freeze-resistant effect of the heat exchanger is achieved by building multi-loop passageways by using sleeves with different sizes and the air cavities, and big heat exchange amount is achieved through multi-loop heat exchanging in a small volume.

The invention discloses a gas water heater with a microcirculation waterway. The gas water heater comprises a heat exchanger, a constant-temperature cabin, a controller, a water inlet pipe and a water outlet pipe, wherein the controller is arranged in the water heater, the water inlet pipe is connected with the heat exchanger, the water outlet pipe is connected to the constant-temperature cabin, and the constant-temperature cabin is connected downstream the water direction of the heat exchanger. The gas water heater is characterized in that a microcirculation bypass is arranged between the constant-temperature cabin and the water inlet pipe, a check valve and a circulating pump are arranged on the microcirculation bypass, a control switch of the water pump is electrically connected with the controller, a temperature sensor is arranged on the constant-temperature cabin, and the temperature sensor is connected with the controller. According to the gas water heater, the microcirculation bypass is additionally arranged, so that the effective use heat of the constant-temperature cabin is increased, the amount of ignition cooling water is reduced, the neutralizing effect of the constant-temperature cabin is increased, and the bath comfort of a user is increased. In an antifreezing area in winter, a microcirculation function is started, and the internal cycle combustion of the whole machine is realized, so that the antifreezing effect is achieved, and gas is saved.

The invention provides an antifreezing flat-plate solar heater, relating to the technical field of solar heaters. The antifreezing flat-plate solar heater comprises a heat insulation water tank and at least one group of flat-plate heat collectors, wherein the heat insulation water tank is provided with a heat insulation tank water inlet pipe, a heat insulation water tank water outlet pipe, a heat insulation water tank circulation water inlet pipe and a heat insulation water tank circulation water outlet pipe; and each flat-plate heat collector comprises heat absorption plates, heat absorption pipes, a first header and a second header, the water inlet end of each first header is connected with the water outlet end of the heat insulation water tank circulation water outlet pipe, the water outlet end of each second header is connected with the water inlet end of the heat insulation water tank circulation water inlet pipe, each heat absorption pipe is arranged horizontally, the first headers and the second headers are arranged vertically, the water inlet ends of the first headers and the water outlet ends of the second headers are respectively arranged at the upper part of the heat collector. The antifreezing flat-plate solar heater disclosed by the invention has a simple and reasonable structure and the cost can be reduced, therefore the flat-plate solar heater can be generalized easily.

The invention provides a heat-insulation PVC (polyvinyl chloride) plastic pipeline which comprises a PVC pipe, a metal heat-conducting layer, a heat-insulation layer, an anticorrosion layer and a solar cell panel. The heat-insulation layer encircles the PVC pipe, the anticorrosion layer is coated on an outer layer of the heat-insulation layer, the metal heat-conducting layer can generate heat under the effect of the solar cell panel, is a netted resistance layer and is connected with wires, resistance wires are longitudinally and transversely staggered on one another to form the netted resistance layer, and the other ends of the wires and the solar cell panel are connected with one another to form a closed circuit. The heat-insulation PVC plastic pipeline has the advantages that currents can be generated by the solar cell panel under the sun illumination conditions in the daytime and can be conducted to the netted resistance layer via the wires, electric energy can be converted into heat energy, the heat can be sustained at night by the aid of the heat-insulation layer, and accordingly freeze protection effects an be realized for the PVC pipe without external power sources; owing to protection of the anticorrosion layer which is the outermost layer, the heat-insulation PVC plastic pipeline can be buried under the ground, and is excellent in water resistance, impact resistance, anticorrosion property and flame resistance, simple in structure and easy to manufacture.

The invention provides an ice-melting snow-removing asphalt mixture, a preparation method thereof, an ice-melting snow-removing asphalt concrete pavement and a construction method thereof, and relatesto the technical field of pavement construction. The preparation method disclosed by the invention comprises the following steps: (a) on the basis of determining the synthesis gradation of an asphaltmixture without a salinization substance, taking the salinization substance as a filler, adjusting the gradation of the asphalt mixture by screening the salinization substance, and determining an asphalt-aggregate ratio a according to a target mixing ratio, on the basis of the asphalt-aggregate ratio a of the asphalt mixture, adopting the salinization substance to replace a part of mineral powder, conducting mix proportion design again, and determining the optimal asphalt-aggregate ratio of the asphalt mixture doped with the salinization substance and the gradation of the asphalt mixture through a Marshall test; and (b) adding raw materials in the asphalt mixture according to the mixing sequence, and conducting mixing to obtain the mixture. According to the invention, the road skid resistance and the ice melting and snow removing performance of the asphalt concrete pavement can be improved.

The invention belongs to the technical field of natural gas extraction, and particularly provides an anti-freezing corrosion inhibition foam drainage scale inhibitor and a preparation method thereof.The anti-freezing corrosion inhibition foam drainage scale inhibitor is prepared from the following components by mass: 15-20% of an organic phosphoric acid corrosion inhibitor, 15-20% of an organic phosphine corrosion inhibitor, 25-30% of a quaternary ammonium salt corrosion inhibitor, 4-10% of a scale inhibitor, 3-5% of an emulsifier, 15-20% of an ampholytic surfactant, and 5-10% of a dispersingagent. The problems that when a large gas field aims at the problems of wellbore scaling, wellbore corrosion, gas well drainage gas recovery and the like, injected traditional scale inhibitors, corrosion inhibitors and foam drainage agents are single in agent performance, tedious in injection system and large in agent injection workload and do not have the anti-freezing effect are solved, the functions of scale prevention, corrosion inhibition, corrosion prevention, foam drainage and freezing prevention are achieved, and the application prospect is wide. One-dose multi-effect is achieved, themedicament filling efficiency is improved, the medicament filling workload is reduced, the safety risk in the medicament filling process is reduced, and the problem that a traditional medicament is frozen in winter is solved.

The invention discloses pesticide spraying equipment with an anti-freezing function for garden gardening. The pesticide spraying equipment comprises a base, wherein a supporting shell is fixed to the top of the base, a pesticide liquid box is fixed to the top of the supporting shell, a spraying mechanism capable of adjusting the spraying range is arranged at the top of the pesticide liquid box, a heat generating mechanism and a driving mechanism used for driving the spraying mechanism to swing are arranged in the supporting shell, a lifting mechanism is arranged at the inner bottom of the supporting shell below the heat generating mechanism, the heat generating mechanism comprises a sliding frame, the sliding frame is vertically and slidably mounted on the inner side wall of the supporting shell, a friction plate and a moving plate are horizontally and slidably installed on the inner wall of the sliding frame, and springs are fixed to the opposite faces of the friction plate and the moving plate. According to the pesticide spraying equipment, by arranging the heat generation mechanism, the driving mechanism and the lifting mechanism, the effect of dynamic heat generation is achieved through temperature changes, and then the effect of preventing pesticide water from freezing is achieved.

The invention relates to an environmental monitoring type anti-freezing water meter. The water meter comprises a water meter body and an intelligent control module arranged below the body; the intelligent control module comprises an amplification circuit, an A / D conversion module, a single-chip computer and a switching circuit; an electric heating wire is arranged in the body; a temperature sensoris arranged in the body, the temperature sensor is electrically connected with the input end of the amplification circuit through a guiding wire, the output end of the amplification circuit is electrically connected with the input end of the A / D conversion module, and the output end of the A / D conversion module is electrically connected with the single-chip computer; the single-chip computer is electrically connected with the control input end of the switching circuit, and the switching circuit is electrically connected with a strong current power supply and the electric heating wire. According to the water meter, water in the water meter is heated by arranging the electric heating wire to prevent the water in the water meter from freezing and ensure that the temperature of the water in the water meter is above zero DEG C all the time, so that a full-scale anti-freezing effect is achieved to prevent the water flow in the water meter from icing and expanding resulting in damage of thewater meter, the manufacture process is simple and the prices of materials are low.

The invention discloses a toilet with an automatic dirt collecting function.The toilet comprises a chamber, a toilet bowl located in the chamber, a flushing system for flushing the interior of the toilet bowl, a suction mechanism, a dirt collecting assembly and a first valve.The suction mechanism comprises a gas-liquid separation box, a vacuumizing device and a dirt inflow pipe.The gas-liquid separation box comprises a box body and a conical net, a vacuum connector is arranged on the top of the box body, a dirt inflow opening is formed in one side of the box body, a dirt outlet is formed in the bottom of the box body, the conical net is fixedly arranged in the box body and located above the dirt inlet, and the external diameter of the conical net is gradually reduced from top to bottom.The dirt collecting assembly comprises a dirt discharge pipe and a dirt collecting bag, the upper end of the dirt discharge pipe is used for being communicated with the dirt outlet, the dirt collecting bag is detachably installed at the lower end of the dirt discharge pipe, and the interior of the dirt collecting bag is communicated with the lower end of the dirt discharge pipe.The first valve is installed between the dirt discharge pipe and the dirt outlet and used for controlling communication or isolation of the dirt discharge pipe and the dirt outlet.Dirt of the toilet bowl can be automatically collected, and an anti-freezing effect can be achieved.

The invention relates to a preparation method of an anti-dry and anti-freezing hydrogel. The hydrogel is prepared from a monomer, a solvent, a crosslinking agent, an initiator, an additive and hygroscopic molecules, the anti-dry performance of the anti-dry and anti-freezing hydrogel prepared by the preparation method is that the elasticity is still kept after the hydrogel is placed in a dry environment with a humidity of 11%-13% RH for 1-7 months in an open mode at the room temperature, the anti-freezing performance is that the hydrogel is still not frozen after being dried in a vacuum dryingbox at the temperature of -50 DEG C for 1-7 days, and good elasticity is kept. The anti-dry anti-freezing hydrogel is adopted to load an explosive detection reagent and is directly used for detectingcorresponding explosive particles or liquid. Therefore, the problem that a detection device taking hydrogel as a substrate inhibits ion transmission due to freezing below zero DEG C or loss of water when used in a dry environment and further limits the use of the detection device in a low-temperature and dry environment is solved.

The invention discloses a manual emptying defroster for a water supplying and draining pipeline, which comprises a water supplying valve, a water draining valve, a water supplying and draining pipe and a water tank. The invention is characterized in that the upper end of the water supplying and draining pipe is downward bent to enter the water tank, one end of an emptying air inlet pipe is inwardinserted in a water inlet direction at the bent top end of the water supplying and draining pipe, the other end of the emptying air inlet pipe is connected with a manual emptying air inlet valve, theupper part of the water draining valve is connected with a water leading pipe, and the water leading pipe is connected with a manual water leading valve. The manual emptying defroster for the water supplying and draining pipeline can overcome the defect of the prior art, and has the characteristics of simple structure, convenient use, low production cost, long service life, water conservation, automatic defrosting and the like.

The invention relates to the field of lined or sheathed plastic molding or connection, in particular to a continuous fiber prepreg tape winding pipe with hollow walls. The continuous fiber prepreg tape winding pipe with the hollow walls comprises a tubular pipe body (1) and is characterized by further comprising a continuous fiber reinforced supporting layer (2), a protection surface layer (4) andsupporting ribs (5). The continuous fiber reinforced supporting layer (2) is attatched to the outer side wall of the pipe body (1), the protection surface layer (4) is arranged outside the continuousfiber reinforced supporting layer (2) in a sleeving mode, and a hollow wall layer (3) is formed between the continuous fiber reinforced supporting layer (2) and the protection surface layer (4), theouter side wall of the continuous fiber reinforced supporting layer (2) is connected with the inner side wall of the protection surface layer (4) through at least three supporting ribs (5), and the supporting ribs (5) are uniformly distributed around the continuous fiber reinforced supporting layer (2). The continuous fiber prepreg tape winding pipe is good in uniformity, long in service life, high in thermal insulation property and high in mechanical strength.

The invention discloses an igniting temperature control device of a gas water heater.The device comprises a heat exchanger made of a stainless steel material, a burning device used for supplying high-temperature flue gas to the heat exchanger, a water channel communicated with the heat exchanger, a first temperature detection device arranged on the heat exchanger or the water channel and a controller; when the temperature detected by the first temperature detection device is lower than or equal to the first preset temperature or the lowering speed of the temperature detected by the first temperature detection device is higher than or equal to a first preset value, the controller controls the burning device to run in the state that the thermal bearing capacity requirement of the stainless steel heat exchanger is met.According to the igniting temperature control device of the gas water heater, the heat exchanger made of the stainless steel has the good thermal inertia and the excellent thermal insulation property, therefore, the burning device is started to perform heating when the igniting temperature control device of the gas water heater is in a halt mode, and it can be guaranteed that the heat exchanger is not failed while the anti-freezing effect is achieved.

A water-based fire extinguishing agent that can be adjusted in proportion. The water-based fire extinguishing agent includes A component, B component and water; A component includes the following raw materials in parts by weight: 5-20 parts of fire extinguishing components, 0.5-3 parts of surfactant, 0.01-0.1 part of water-soluble natural essence and 2-5 parts of EDTA metal salt; component B includes the following raw materials in parts by weight: 8-15 parts of flame retardant, 5-10 parts of antifreeze, and 1-3 parts of glyoxime. When the combination ratio of A and B components in the fire extinguishing agent of the present invention is ≤1, the fire extinguishing agent is suitable for Class A fires, and when the above ratio is greater than 1, the fire extinguishing agent is suitable for Class B fires. Flexible preparation can not only extinguish fire efficiently but also avoid waste of resources; on the one hand, the addition of raw material pentaerythritol can effectively prevent flashback and reburning, on the other hand, it can also make the amount of antifreeze lower than the conventional amount, that is, at a lower amount Finally, it was unexpectedly found that the addition of glyoxime can synergize with the fire extinguishing agent and flame retardant to further improve the fire extinguishing effect.

The invention discloses an anti-freezing control method of a low-temperature air source heat pump heater. By means of the method, a required anti-freezing level can be judged automatically according to the temperature, and then corresponding devices are started for anti-freezing treatment. When the environment temperature is not very low, a water pump is started to run intermittently, and a watersystem is made to generate current to prevent freezing; when the environment temperature is low and water is still in a low-temperature state even after a first-stage freezing prevention mode of the water pump is started, a second-stage freezing prevention mode is started, heating starts, special treatment is carried out on defrosting at low water temperature, efficiency reduction caused by excessive frosting in the running process is avoided, and the water temperature is increased quickly to prevent freezing; and under the situation that the system cannot implement the second-stage freezing prevention mode due to refrigerant absence, start failure of a compressor and the like, a third-stage freezing prevention mode can be started, and an auxiliary electric heater of the water system is started to directly heat water to increase the temperature, so that the anti-freezing effect is achieved. By adoption of three-stage anti-freezing design, freezing prevention of the water system when the air source heat pump heater is in a standby state or shutdown state or failure state under the low-temperature environment is thoroughly achieved.

The invention discloses a water pump anti-freezer. The water pump anti-freezer comprises a power input device. The water pump anti-freezer is characterized by further comprising an electronic temperature controller (1), a power line (2), a temperature control probe (4) and a heating rod (4), wherein the heating rod (4) is inserted at a water blowing port of a water pump, the temperature control probe (3) is attached to the surface of a pump body of the water pump, and the electronic temperature controller (1) controls the temperature control probe (3) and the heating rod (4). The water pump anti-freezer can heat water in a pump head of the water pump to achieve the anti-freezing effect, heating anti-freezing is automatically controlled, and therefore great convenience is brought to the development of the water pump industry.

The invention discloses a floor heating system with an antifreezing heat pump. The system comprises a heat pump main machine, a connecting pipe, a water dividing and collecting device, several groupsof territory tubes, a heating circulating water pump and an exhaust water escape valve, wherein the water dividing and collecting device is arranged on one side of the heat pump main machine, and is connected to the heat pump main body through the connecting pipe; the territory tubes are arranged on one side of the water dividing and collecting device; the heating circulating water pump is arranged on the other side of the water dividing and collecting device, and is connected to the water dividing and collecting device through a pipeline; and the exhaust water escape valve is connected to thesurface of one side of the bottom of the water dividing and collecting device. The system can monitor the temperatures in the territory tubes effectively through temperature sensors, and also can send monitoring data to a controller. Through the controller, a temperature adjuster and a heating block can be controlled to operate effectively to prevent the territory tubes from being frozen as the temperature is too low; and the temperature adjustor can adjust the heating temperature of the heating block flexibly, so that the floor heating temperature can be compensated, and the heating efficiency is improved.

The invention discloses an anti-freezing device for a coal mine shaft. According to the anti-freezing device, an electric heating mode is adopted for providing hot air, so that the efficiency is improved, the energy is saved, the environment is protected, and meanwhile, the anti-freezing effect of the shaft is achieved. According to the technical scheme, one end of an electric heating module is connected to a power module, the other end of the electric heating module is connected to a hot air conveying module, a power supply module is connected to the electric heating module and is used for supplying power to the electric heating module, and through the power module, the electric heating module sends generated heat to a mine shaft roadway through the hot air conveying module; multiple cylinder bodies of the electric heating module are connected together in sequence, multiple heating bands are arranged on the exteriors of the cylinder bodies, multiple supports are arranged at the bottomparts of the cylinder bodies, and lifting lugs are arranged at the top parts of the cylinder bodies; and the power module and the hot air conveying module are fixedly connected to the electric heating module through bolts. The anti-freezing device can be widely applied to the field of anti-freezing equipment of the coal mine shaft.

A drainable and antifreezing solar water heater comprises a solar water heater storage tank (1), an electromagnetic valve (2) and an air inlet pipe (3). The electromagnetic valve comprises a power source (11), a power source switch (10), an electromagnet (8), a sucking plate (7), a driving piece (6) and a driving disc (5). The electromagnet (8) is connected with a power source switch (10) and a power source (11) via leads and is fixed on the support, and the driving disc (5) is fixed on a valve handle (4). Since the air inlet pipe is communicated with a water pipe, water in the water pipe can be quickly drained out when the electromagnetic valve is turned off, and thus antifreezing effect is realized.

The invention discloses a toilet with an automatic dirt collecting function.The toilet comprises a chamber, a toilet bowl located in the chamber, a flushing system for flushing the interior of the toilet bowl, a suction mechanism, a dirt collecting assembly and a first valve.The suction mechanism comprises a gas-liquid separation box, a vacuumizing device and a dirt inflow pipe.The gas-liquid separation box comprises a box body and a conical net, a vacuum connector is arranged on the top of the box body, a dirt inflow opening is formed in one side of the box body, a dirt outlet is formed in the bottom of the box body, the conical net is fixedly arranged in the box body and located above the dirt inlet, and the external diameter of the conical net is gradually reduced from top to bottom.The dirt collecting assembly comprises a dirt discharge pipe and a dirt collecting bag, the upper end of the dirt discharge pipe is used for being communicated with the dirt outlet, the dirt collecting bag is detachably installed at the lower end of the dirt discharge pipe, and the interior of the dirt collecting bag is communicated with the lower end of the dirt discharge pipe.The first valve is installed between the dirt discharge pipe and the dirt outlet and used for controlling communication or isolation of the dirt discharge pipe and the dirt outlet.Dirt of the toilet bowl can be automatically collected, and an anti-freezing effect can be achieved.

An embodiment of the invention provides self-service selling equipment with an anti-freezing function. The equipment comprises a first heat preservation lamp which is disposed in an equipment body; asecond heat preservation lamp which is arranged in the equipment body; a temperature control module, which is arranged in the equipment body and is connected with the first heat preservation lamp andthe second heat preservation lamp; and a power supply module, which is arranged in the equipment body and is connected with the first heat preservation lamp, the second heat preservation lamp and thetemperature control module. The self-service selling equipment with the anti-freezing function can realize the anti-freezing function.

The invention discloses an intelligent water meter with a winter anti-freezing structure and a method thereof, relates to the technical field of intelligent water supply equipment, and aims to solve the problems that heat dissipation of a fixed intelligent water meter is inconvenient in hot summer, the service life of the intelligent water meter is shortened, manual installation is troublesome in operation and the like because the anti-freezing mechanism is directly installed on the intelligent water meter. According to the anti-freezing device, through an installation driving mechanism and an anti-freezing protection mechanism arranged at the upper end of the installation driving mechanism, a sealing assembly is elastically connected with an anti-freezing protection shell, the upper end of the anti-freezing protection shell can be automatically covered with the sealing assembly, and a movable transmission assembly is arranged in the middle of the lower end of the anti-freezing protection shell; the anti-freezing effect of the intelligent water meter in winter can be improved, full-automatic operation is achieved, the trouble of manual operation is reduced, the influence caused by too large instrument heat dissipation when the intelligent water meter is in an anti-freezing state is avoided, and the anti-freezing effect of the water supply end of the intelligent water meter is achieved in an auxiliary mode.

The invention discloses a solar water heater having an anti-freezing function. The solar water heater comprises a water storage box, the water storage box and solar water heating pipes are fixed to alight-reflecting plate through supports, the water outlet end of the water storage box is connected with the water inlet ends of the solar water heating pipes, electric heating wires are embedded intothe side wall of an inner cavity of the water storage box and the side walls of inner cavities of the solar water heating pipes, first connecting sleeves are installed at the water outlet end of thewater storage box, first electrodes are arranged on the side walls of the first connecting sleeves, second connecting sleeves are arranged at the water inlet ends of the solar water heating pipes, second electrodes are arranged on the side walls of the second connecting sleeves, the electric heating wires embedded into the side wall of the inner cavity of the water storage box and the electric heating wires embedded into the side walls of the inner cavities of the solar water heating pipes are connected through the first electrodes and the second electrodes, and a box body is arranged on a shell of the water storage box. The solar water heater having the anti-freezing function is simple in structure, low in manufacturing cost, convenient to use, easy to maintain, good in anti-freezing effect and easy to popularize.

The invention relates to an antifreeze solar street lamp with cleaning function based on the Internet of Things, which includes a lamp pole, a solar panel and two lighting mechanisms. The solar panel is fixed on the top of the lamp pole, and the two lighting mechanisms are respectively arranged on the lamp pole. On both sides of the light pole, a cleaning mechanism is provided in the light pole. An anti-freeze mechanism is provided on both sides below the solar panel. The lighting mechanism includes a rotating component and a cooling component. The cleaning mechanism includes a power component and two cleaning components. Component, the rotating component includes a support rod, a rotating rod, a rotating motor, a rotating gear, a rotating gear, a lamp arm and a notch. The antifreeze solar street light with cleaning function based on the Internet of Things achieves cleaning through the rotating component and the cleaning mechanism. Function, not only that, but also achieves the anti-freeze effect of the street light through the cooling component and anti-freeze mechanism.

The invention provides a permeable brick and a preparation method thereof. In the present invention, the integral permeable brick is designed as a two-part structure, that is, the surface layer part and the bottom layer part. The two parts are formed by different ingredients, wherein the surface layer raw materials include waste ore, cement, silica fume, additives and Water; the base material includes a certain proportion of waste ore, cement, iron tailings and water. The above-mentioned different raw material formulas are used to form the surface layer and the bottom layer respectively, which not only effectively utilizes industrial solid waste (waste ore and iron tailings), but also meets the performance requirements of permeable bricks to achieve high water permeability, high strength, and wear resistance. , Antifreeze effect.

An environment-friendly flame-retardant antifreeze water-based fire extinguishing agent, the water-based fire extinguishing agent includes the following raw materials in parts by weight: 5-20 parts of fire-extinguishing components, 2-5 parts of EDTA metal salt, 0.5-5 parts of surfactant, and 0.01 parts of water-soluble natural essence ‑0.1 part, 1‑3 part of pentaerythritol, 4.9‑7.8 part of flame retardant, 2‑7.5 part of antifreeze, make up to 100 parts of water. The compounding of pentaerythritol and ethylene glycol and other antifreezing agents of the present invention can effectively achieve the antifreezing effect at a relatively low amount of antifreezing agent; the flame retardant and pentaerythritol can form a non-combustible carbon layer, which can resist backfire and recombustion, and is beneficial to fire extinguishing The inventor also found unexpectedly that adding quantitative sodium ammonium phosphate in the flame retardant can further shorten the average fire extinguishing time of the fire extinguishing agent, the average number of fire extinguishing times and reduce the surface tension of water. The fire extinguishing agent of the present invention is transparent, stable in storage, environment-friendly, low temperature resistant, suitable for extinguishing class A fires and class B fires, and has simple preparation method, cheap and easy-to-obtain raw materials, and is a high-efficiency water-based fire extinguishing agent suitable for large-scale industrial production .

An anti-freezing device of a solar water heater is installed on a water storage tank of the solar water heater; a coil 1, a power source 2, a power switch 3, a valve 4, an actuation board 5 and a spring 6 are arranged in an electromagnetic switch; the switch, the coil and the power source are connected together through wires; the actuation board is made of iron materials and fixed on a valve handle; the power switch is turned on, electromagnetic force is generated in the coil and attracts the actuation board to move forwards, and therefore the valve is opened and hot water in the solar water heater flows out; the spring is installed on the actuation board, the other end of the spring is fixed on a support, when the power source is turned off, the spring pulls the actuation board to return to the original position, and the valve is closed.

The invention discloses a positive accumulated temperature ventilation regulation and control device and method for a tunnel drainage system in a cold region. The regulation and control device comprises a drainage system ventilation device and a temperature data collection and analysis system, wherein the drainage system ventilation device comprises a ventilation unit and a control unit, the temperature data collection and analysis system comprises an out-of-tunnel weather station thermometer and a temperature data processor, and the out-of-tunnel weather station thermometer is arranged outside a tunnel portal. According to the ventilation regulation and control device and method, a positive accumulated temperature principle and a ventilation regulation and control concept are creatively applied to heat preservation and freezing prevention of the cold region tunnel drainage system, high-temperature air in a tunnel is introduced into a heat preservation ditch of the drainage system through the ventilation unit, and therefore heat is stored in the drainage system and rock stratums around the drainage system to achieve the freezing prevention effect of the drainage system; the ventilation unit is adopted for conveying air into the heat preservation ditch, and the space within the clearance and outside the clearance of the tunnel can be fully utilized; and the long-term reliability and the anti-freezing effect of the device and the method are superior to those of a steam heating method and a cable heating method.