388 results about "Frost crack" patented technology

The present invention relates to one kind of integral high concentration waste water processing apparatus. The apparatus has aerobic baffle plate reactor, water collecting settling tank, aerobic reaction tank or biological contact oxidizing tank and settling tank connected via vertical baffle plates. The unique separating structure and the plug flow mode make each reactor capable of domesticating and culturing microbe colony adaptive to the water quality and environment condition. The present invention is favorable to utilizing the activity of the anaerobic bacteria colony, raising the processing effect and stability of the system and simplifying the system structure. The present invention has small coverage area, low system cost, low power consumption and no frost crack of pipeline.

The invention discloses a quality improver for flour and minor cereal flour and a using method thereof. The improver is mainly prepared by compounding transglutaminase, an enzyme preparation commonly used in flour products, other auxiliary materials and the like according to a certain proportion. The invention relates to the manufacturing of raw wet flour products, baked foods and minor cereal foods by using the quality improver containing the transglutaminase. Specifically, the method comprises the following steps of: 1) adding into the minor cereal flour or the flour according to a certain proportion and mixing; 2) kneading a dough; 3) preserving heat for certain time; and 4) obtaining a finished product. The improver can improve the processability of the minor cereal flour and the flour and the network structure of gluten, noodles are difficult to rupture during the cooking, dissolved matter is reduced, and the frost crack is prevented during the refrigeration; and the improver has the functions of improving the volumes of bread and minor cereal bread, reinforcing side walls of the bread and the minor cereal bread, improving slicing performance, shortening fermentation time, increasing moisture absorption and the like.

The invention provides an anti-cracking method for quickly frozen glue pudding of low production cost and high product quality. In order to reach the goal, the invention adopts the following technical scheme that: 1-8 percent of DHC-F7101 modified starch and 1-8 percent of trehalose by weight percent are added in glutinous rice flour and are evenly mixed. By adopting the technical scheme, the water retaining capacity and the low-temperature stability of the glutinous rice flour are good, and the damage rate and the frost cracking rate caused by water loss and product temperature fluctuation during processing, storage, logistics and sales of the quickly frozen flue pudding are well improved. The glue pudding is prevented from being cracked, so the production cost is reduced, the return rate is reduced, the product quality is improved and the product shelf life is prolonged.

The invention relates to a plant fiber light wall and a manufacturing method thereof. The plant straw renewable waste content in the raw material may reach over 50 percent; active silicon dioxide is adopted in the formula, so the absorbability and fire resistance are improved, the fire-proof, water-proof, anti-frost-cracking, anti-aging-cracking or related performances of the wall plate are realized, the product is suitable to be used both indoor and outdoor, and the application range of the product is expanded; the production process is simple and environment-friendly, large hot-pressing equipment is not needed, waste gas, waste residue and greenhouse carbon dioxide gas are not generated in a production process, and real low-carbon and environment-protection purposes are fulfilled; and the formula of the raw material is mainly plant straws, and the produced product is green building material which is nontoxic, odorless, pollution-free, and radiation-free. The method has the characteristics of environment friendliness, energy conservation, high waste utilization rate, simple process, low cost and the like.

The invention relates to a pipeline fire control liquid which comprises the following components in parts by weight: 15-35 parts of an antifreezing agent, 2-15 parts of a flame retardant, 5-20 parts of an antirust agent, 1-8 parts of an anticrustator, 0.1-10 parts of a preservative, 2-10 parts of a buffer agent, 0.05-1 part of a dye and 30-60 parts of deionized water. The pipeline fire control liquid provided by the invention has a good antifreezing effect, and can prevent a pipeline from frost crack by liquid icing effectively in winter. The pipeline fire control liquid has an antirust effecton the pipeline and valves, and meanwhile has a corrosion-resistant component to prevent breeding microorganisms in the liquid, so that the service life is relatively long, and the pipeline fire control liquid has a certain flame retardant effect.

The invention discloses a composite material of a heat insulation and sound insulation aerogel layer composite breathable membrane and a manufacturing method thereof. The composite material comprises a breathable membrane layer, a bonding connection layer and an aerogel layer, wherein the breathable membrane layer and the aerogel layer are bonded through the bonding connection layer. The manufacturing method of the composite material comprises the steps of performing process preparation, unreeling the breathable membrane, coating the breathable membrane with the bonding connection layer in a rolling way; laying aerogel; spraying and coating the bonding connection layer on the aerogel layer; covering the aerogel layer with the breathable membrane; performing heating rolling pressing and curing; performing rolling. The composite material has the advantages that the flexibility is high; frost crack cannot occur in an environment from the extremely low temperature of -268 DEG C to the temperature of 300 DEG C; the composite material can be widely applied to occasions with requirements of long service life, corrosion protection, outdoor ultraviolet environment aging resistance, heat insulation protection and strong sound isolation.

The invention relates to a method for winter protection of trees by utilizing an aluminum plating reflective membrane. For the winter protection of gardening shrubs such as highbush blueberries and the like and arbor young trees, the aluminum plating reflective membrane used as a winter protection material is made into a tubular bag with proper length; during end-autumn and early-winter, tubular bags are sleeved outside tree bodies of which branches are bound into fasciculation by nylon cords in advance, and then are tightly bounded and sealed; for the winter protection of shrub-like trees such as lowbush blueberries and the like, vine plants such as grape vines and the like, and nursery-grown plants, the aluminum plating reflective membranes are directly covered above the plants, the planted row and a seed bed with necessary winter protection, of which branches are bound in advance, and the aluminum plating reflective membranes are compacted around by soil; and for the prevention of frost crack of trunks of planting tree species, the aluminum plating reflective membrane covers 1 to 2m from the bottom of the trunk. The method has the advantages that: 1, damage to trees caused by overhigh local temperature and overlarge temperature difference between day and night of the trunk due to direct solar irradiation to the day side of the tree is avoided; and 2, the bag covering mode has the effects of heat insulation and moisture resistance, and the method is low in cost and can be easily operated.

The invention relates to water pump equipment, in particular to a frost crack prevention water pump which aims to solve the problem that the traditional anti-freezing water pump cannot fundamentally prevent frost cracks, while some people propose that the inner wall of a water meter or a pipeline is provided with an expansion layer, though the frost cracks can be prevented, freeze is difficult to thaw from outside after icing. The frost crack prevention water pump comprises a pump case, an impeller and a flow guide pipe, wherein the impeller is externally provided with a water outlet cover with an axle center hole, and the water outlet cover divides the internal space of the pump case into an impeller chamber and a front chamber which are mutually communicated; the flow guide pipe is arranged in the front chamber, and one end of the flow guide pipe is connected with a water inlet pipe extending into the pump case, while the other end is connected with the axle center hole of the water outlet cover; the flow guide pipe is externally sleeved with an elastic expansion piece; and the elastic expansion piece is large at both ends and small in the middle, provided with an axle center hole and made of a non-hygroscopic elastic material. The frost crack prevention water pump has the advantages of simple structure, frost crack prevention and easier thawing and is widely suitable for various cold environments.

The invention discloses a downhole coal bed methane extraction method and liquid nitrogen flowing frost cracking devices used in the same. The method includes the steps that 1, liquid nitrogen injection drilled holes and reinforced extraction drilled holes are alternately formed in a coal bed; 2, the fixed liquid nitrogen flowing frost cracking devices are inserted into the liquid nitrogen injection drilled holes; 3, liquid nitrogen is continuously injected into the drilled holes through a liquid nitrogen inlet, and the liquid nitrogen which flows back from a liquid nitrogen outlet is receivedto form a liquid nitrogen flowing loop; 4, the internal temperature of the liquid nitrogen injected into the drilled holes is increased through cable heating, and the liquid nitrogen is rapidly gasified; 5, mixed gas of coal bed methane and the nitrogen is extracted through the reinforced extraction drilled holes. The structure and the method have the advantages that the extraction cost of the coal bed methane is low and the extraction rate is high.

The invention discloses a fireproofing sealing material, which comprises compositions by weight of: 21-31% of resin, 42-58% of stuffing, 13-18% of fire retardant, 1-3% of assistant, 2-5% of anti-crack fibers and 1-5% of tackifier, wherein the sum of weight percentages of the compositions is 100%. The fireproofing sealing material not only has good fire resistance, flame retardance, corrosion resistance, water resistance, oil resistance, humidity resistance, frost crack resistance and the like and has the advantages of being free of halogen and sulphur and environment-friendly.

Design and manufacturing of an ultra-large rectangular or oblong-shaped LNG storage tank are characterized in that the cross section of a tank body of the LNG storage tank is rectangular or in the shape of an oblong, a stressed layer of the tank wall is made of pre-stressed reinforced concrete in a blocked mode or in an integrated mode, longitudinal, transverse and vertical three-direction pre-stressed reinforced concrete beam frames are arranged in the wall of the tank, a top cover of the tank is in the shape of a one-way arc face or a flat top or a slope, and the top cover of the tank is supported on stand columns. A heat-preserving layer is arranged on an outer layer or an inner layer, or both the inner layer and the outer layer are respectively provided with a heat-preserving layer. A material containing layer is an inner coating layer or an inner adhering layer, or the material containing layer is composed of both the inner coating layer and the inner adhering layer, the inner coating layer is made of anti-leakage, anti-frost crack and anti-corrosion coating, the inner adhering layer is made of low-temperature nickel steel, stainless steel, ceramic or low-temperature-resistant plastic boards, and therefore the high-difficulty design and the high-difficulty manufacturing of the ultra-large LNG tank are converted into design and manufacturing of a large conventional pre-stressed reinforced concrete building, successful and rich experience is achieved in both the design and the manufacturing of the large conventional pre-stressed reinforced concrete building by people, people only need to pay attention to selection and utilization of ultra-low-temperature materials, and the design can guarantee that pressure in a 200000m<3>-400000m<3> LNG storage tank can reach 3mpa. The cost for the design and the manufacturing is several times smaller than that of an existing LNG storage tank, and stress, stability, anti-disaster performance and borne inner pressure of the designed and manufactured LNG storage tank are several times higher than those of the LNG storage tank in existing design.

The invention relates to the technical field of engineering construction, in particular to thermosetting emulsified flexible epoxy resin modified emulsified asphalt. The emulsified asphalt is characterized in that alkylphenol polyoxyethylene is used for emulsifying two-component A epoxy resins to prepare epoxy resin water emulsion; the alkylphenol polyoxyethylene is used for emulsifying nonyl phenol-terminated polyurethane resins to prepare the water-emulsified epoxy resin toughening agent; the epoxy resin water emulsion is mixed with the water-emulsified epoxy resin toughening agent to prepare the emulsified flexible epoxy resin; mixture of one or more of modified aliphatic amine, phenolic aldehyde amine and the like and the alkylphenol polyoxyethylene are used for preparing the water-emulsified epoxy resin curing agent; and the emulsified flexible epoxy resin and the water-emulsified epoxy resin curing agent are mixed with emulsified asphalt. The emulsified asphalt has the advantages of convenient construction, conventional construction process and simple tools under normal temperature. The water-emulsified epoxy resin curing agent carries out reactive crosslinking with the emulsified flexible epoxy resin modified asphalt, so the performance of the emulsified asphalt is thoroughly changed, that is, the common emulsified asphalt begins melting at 60 DEG C and is hardened and undergoes frost crack at minus 20 DEG C, but the emulsified asphalt of the invention is not molten at 160 DEG C and is free from brittle rupture at minus 25 DEG C and maintains flexibility for a long time under normal temperature.

The invention relates to the technical field of road pavement. Directed at the problem of easy cracking of a pavement under the condition of a low temperature, the invention provides a frost-crackingproofing pavement. The frost-cracking proofing pavement comprises the following components by mass: 7 to 10 parts of asphalt, 50 to 70 parts of gravels, 15 to 20 parts of fine sand, 7 to 10 parts of mineral powder, 5 to 7 parts of waste rubber particles, 1 to 2 parts of a vulcanizing agent, 0.5 to 1 part of aniline, 1 to 1.5 parts of m-hydroxybenzoic acid and 3 to 4 parts of hollow glass beads. According to the invention, through addition of the waste rubber particles, wastes are easily recovered and utilized, and the natural environment is easily improved; meanwhile, toughness, tensile strength and frost-cracking resistance of the pavement are easily reinforced.

The invention discloses a water meter shell material and a preparation method thereof. The material is characterized by comprising the following raw materials in parts by weight: 75-90 parts of iron ore powder, 10-25 parts of polypropylene, 0.1-1.5 parts of antioxidant and 0.1-0.5 part of anti-ultraviolet agent. By using the iron ore powder as the main preparation material instead of the traditional pure plastic or stainless steel material, the method fully utilizes the wide-source low-price raw material; and the material prepared by mixing, cooling and setting the iron ore powder and molten polypropylene has the advantages of high strength, wide temperature variation resistance range (-30-60 DEG C), low tendency to frost crack, and good explosion resistance. Besides, compared with the traditional stainless steel, the material disclosed by the invention has the advantages of light weight and equivalent strength, and is convenient to install, allocate and transport.

The invention discloses a quick-frozen fresh-keeping deep-fried dough stick and a making method thereof and belongs to the technical field of food processing. The quick-frozen fresh-keeping deep-fried dough stick is mainly composed of, by weight, 110-120 parts of flour special for making deep-fried dough sticks, 8-10 parts of acetylated wheat modified starch, 10-15 parts of white glutinous rice flour, 60-70 parts of water, 2-3 parts of leavening agents, 0.1-0.2 part of yeast, 3-5 parts of soybean oil, 5-10 parts of edible salt, 5-10 parts of eggs and 7-12 parts of white sugar. The flour special for making the deep-fried dough sticks, the acetylated wheat modified starch and the white glutinous rice flour are adopted, so that forming of a gluten network can be promoted, strength and gluten tenacity of the deep-fried dough stick are improved, and frost crack rate of skin of the deep-fried dough stick after quick freezing can be lowered; a low-temperature quick deep-fry method and a quick freezing method are adopted to make the deep-fried dough stick, so that water content, oil content, acid value and peroxide value of the deep-fried dough stick can be lowered, and original freshness and nutrition facts of the deep-fried dough stick can be maintained furthest.

The invention discloses an anti-freezing device for a closed cooling tower. The anti-freezing device comprises a water inlet pipe of the cooling tower and a water outlet pipe of the cooling tower, wherein the water inlet pipe of the cooling tower is connected to the water inlet end of the closed cooling tower, and the water outlet end of the closed cooling tower is connected with the water outlet pipe of the cooling tower. The anti-freezing device for the closed cooling tower is characterized by comprising an anti-freezing machine device. The anti-freezing machine device comprises a water inlet pipe of the anti-freezing machine and a water outlet pipe of the anti-freezing machine, wherein the water inlet pipe of the anti-freezing machine is connected with the outlet pipe of the cooling tower, the water outlet pipe of the anti-freezing machine is connected with the water inlet pipe of the cooling tower; the water inlet pipe of the cooling tower is provided with a first valve; the water outlet pipe of the cooling tower is provided with a second valve; the water inlet pipe of the anti-freezing machine is provided with a third valve; the water outlet pipe of the anti-freezing machine is provided with a fourth valve; and a pipeline at the back of the third valve is provided with a pump and a check valve successively in water flow direction. The anti-freezing device for the closed cooling tower is convenient to operate and reliable in work, can effectively prevent a coil pipe of the closed cooling tower from frost crack in winter, and ensures a normal operation of the closed cooling tower in winter.

The invention discloses a solar thermal collector freezing prevention system and relates to a thermal collector freezing prevention system. The invention solves the problem of frost cracks of valves and pipelines due to residual water in the system by a backflow and exhaust system and the problems of large initial investment and easy environmental pollution of a freezing prevention liquid system. A sewage heat exchanger, a solar thermal collector and the terminal of a heat user are sequentially communicated by a cycle working medium charge pipe; the sewage heat exchanger is communicated with the terminal of the heat user by a cycle working medium backflow pipe; a circulating water pump is installed on the cycle working medium charge pipe; one end of a first communicating pipe is communicated with the cycle working medium charge pipe, and the other end of the first communicating pipe is communicated with the cycle working medium backflow pipe; a first valve is installed on the first communicating pipe, a second valve is installed on the cycle working medium backflow pipe, and a high-temperature sewage pipe and a low-temperature sewage pipe are installed on the sewage heat exchanger. The invention reduces the initial investment of a freezing prevention liquid system of the solar thermal collector and solves the problems of environmental pollution and frost cracks of the pipelines and the valves.

The invention provides a solar water heater intelligent temperature control method. The solar water heater intelligent temperature control method includes: comparing real time water temperature Tt of a water tank with upper limit set temperature T1 and lower limit set temperature T2, controlling a water inlet valve and an emptying valve to move through a comparison result, and achieving intelligent thermoregulation. The invention further provides a thermoregulation emptying device. The thermoregulation emptying device is characterized in that a four way pipe is installed below a water heater, four pipelines of the four way pipe are respectively connected with a tap water pipe, and a vacuum pipe, an overflow pipe and a hot water outlet valve of the solar water heater, and electromagnetic valves are installed on three of the four pipelines of the four way pipe, and control the electromagnetic valves to open through controllers. The solar water heater intelligent temperature control method solves the problems that the temperature of the water tank is high, and an electric auxiliary heating device generates energy waste. The thermoregulation emptying device does not need to change structure of the existing solar water heater, is simple in structure, saves water consumption, recycles and reuses water through a reserved water tank, can effectively reduce living consumption, achieves intelligent water adding and pipeline emptying functions, and effectively avoids frost cracks on a pipeline of the solar water heater in winter.

The invention relates to the technical field of water heaters, and particularly relates to a pipeline frost-crack preventing automatic protective valve in a water heater. A solenoid drain valve is arranged in a valve body; the solenoid drain valve comprises a solenoid valve core, and a solenoid coil arranged outside the solenoid valve core; a drain cavity is also arranged in the valve body; the solenoid valve core is arranged in the drain cavity; the lower part of the drain cavity is connected with a drain opening; a solenoid valve core spring pushing the solenoid valve core is arranged in the drain cavity; the drain opening is opened and closed by the lower end of the solenoid valve core; the lower part of the drain cavity is communicated with a water outlet through a connecting pipeline; the side part of the drain cavity is communicated with a valve upper cavity through a pipeline. The valve solves the problem that pipelines in the water heater are frozen and cracked through the effect of the solenoid drain valve, eliminates the hidden danger of water leakage, and avoids unnecessary economic loss brought to users.

The invention relates to an electric heating water pipe. The electric heating water pipe comprises a water pipe, wherein the pipe wall of the water pipe is provided with an inner layer pipe wall and an outer layer pipe wall, a reinforcing layer is arranged between the inner layer pipe wall and the outer layer pipe wall, the inner layer pipe wall is internally provided with an electric heating wire, one end of the water pipe is provided with a temperature sensor which is tightly attached to the outer layer pipe wall of the water pipe, the temperature sensor is used for measuring the temperature of the pipe wall of the water pipe and controlling the switching on and off of a circuit of the electric heating wire, and the other end of the water pipe is provided with an electric plug which is electrically connected with the electric heating wire and is positioned out of the water pipe. The electric heating water pipe disclosed by the invention has the advantages that the water pipe can be effectively prevented from being subjected to frost cracking, and electric energy can be saved.

The invention provides an anti-freezing protection system for an air conditioner as well as the air conditioner. The system comprises a regulating valve opening degree controller which is used for judging whether an anti-freezing protection signal for presenting that the temperature of gas flowing out from a heat coil pipe is lower than a low-temperature threshold value is obtained or not; if the anti-freezing protection signal is obtained, opening degree of a regulating valve of the heat coil pipe is regulated to be biggest, otherwise, a set gas temperature of an air feeding section of the air conditioner and a gas temperature of a mixing section are obtained; a temperature difference value between the set temperature of the air feeding section and the gas temperature of the mixing section is obtained by calculating; an opening degree value which is matched with the temperature difference value is obtained according to a preset mapping table; opening degree of the regulating valve of the heat coil pipe is regulated according to the opening degree; and a mapping relationship between the temperature difference value and the opening degree value is set in the preset mapping table. The anti-freezing protection system provided by the invention effectively prevents an icing phenomenon, caused by a too small opening degree value of the regulating valve of the heat coil pipe, in a water pipe when the temperature of the mixing section is too low, and prevents the heat coil pipe from frost cracks.

The invention discloses a hydraulic pressure type hot water recovery unit, relating to a water-saving frost crack resistant device and aiming at providing a hydraulic pressure type hot water recovery unit which has simple structure, saves water and energy and can prevent pipelines from frost crack. The recovery unit is composed of a blowoff valve, a cold water pipe, a cold water tank, a cold water valve and a water pump, wherein the blowoff valve comprises three working holes, the first working hole is communicated with a hot water tank, the second working hole is communicated with an outlet valve via a hot water pipe, and the third working hole is communicated with external air; one end of the cold water pipe is connected on the junction of the hot water pipe and the outlet valve, and the other end thereof is arranged in the cold water tank; the water pump and the cold water valve are arranged on the cold water pipe; and the cold water tank is internally provided with a water level sensing device. When the outlet valve is opened, the first working hole and the second working hole of the blowoff valve are communicated, and the cold water valve and the water pump are closed; when the outlet valve is closed, the cold water valve is opened, and the water pump is started; and when the water level sensing device senses a low water level, the water pump is closed, and the second working hole and the third working hole are communicated.

The invention discloses a frost-crack-resistant, waterproof and weather-proof building coating and a preparation method thereof. The building coating comprises the following components in parts by mass: 15-25 parts of polyvinyl alcohol, 15-25 parts of polyacrylate emulsion, 10-20 parts of silica sol, 10-20 parts of polyamide, 10-20 parts of quick lime, 10-20 parts of castor oil, 10-20 parts of potassium oxide, 10-20 parts of zinc oxide, 5-15 parts of aluminum oxide, 5-15 parts of polyvinyl acetate, 5-15 parts of methyl methacrylate, 10-20 parts of phenolic resin, 5-15 parts of ground limestone, 5-15 parts of bentonite, 15-25 parts of nano-silica, 15-25 parts of poly(vinylidene fluoride) resin, 15-25 parts of acrylic resin, 10-20 parts of diethylene glycol monobutyl ether, 10-20 parts of xylene, 5-15 parts of saturated hydroxyl terminated polyester resin, 3-5 parts of an antifoaming agent, 3-5 parts of a plasticizer, 3-5 parts of a dispersing agent, 3-5 parts of a fast dry agent, 3-5 parts of a coalescing agent, 3-5 parts of additives and 25-45 parts of deionized water. The building coating disclosed by the invention has the advantage that the waterproof effect and the like are improved, and can be constructed on base planes of multiple humid or dry materials; the building coating is excellent in waterproof performance, non-toxic and harmless, and meets the actual application requirement.

The invention relates to the field of foods, particularly to a frost cracking resistant dumpling wrapper and a preparation method thereof. The dumpling wrapper comprises the following components in parts by weight: 55 parts of all-purpose flour, 28 parts of canna edulis ker powder, 12 parts of buckwheat and 5 parts of water caltrop powder. The preparation method comprises the following steps: putting the raw materials into a stirrer, stirring the raw materials for 5 minutes, then turning on a water tap to enable weak alkali water of which the water temperature is 45-55 DEG C to drip drop by drop, twisting the stirred raw materials in a clockwise direction so as to make flour to become a dough, and then ceaselessly kneading the dough for at least 10 minutes so that the dough becomes tenacious; then putting the kneaded dough into a basin, wrapping the kneaded dough with a cling film, placing the dough wrapped with the cling film at the temperature of 25-30 DEG C for 1-3 hours so as to achieve a fermenting effect, finally putting the fermented dough into a dumpling wrapper machine, and pressing the fermented dough into dumpling wrappers. Dumplings wrapped by the dumpling wrappers prepared by the preparation method disclosed by the invention are not easy to crack or expose fillings even if the dumplings are cooked after being stored in a refrigerating manner, so that the dumplings maintain integrity and are better mouth in feel in the cooking process.

The invention relates to an anti-freezing control method and system for a heat pump unit. The system comprises a water flow detection device and an anti-freezing control device. The water flow detection device is used for detecting the current water flow value. The anti-freezing control device judges whether the current water flow value is smaller than a water flow safety threshold value or not. If the current water flow value is smaller than the water flow safety threshold value, the anti-freezing control device controls a heat pump unit to enter an anti-freezing protection mode, and the heatpump unit is stopped. If the current water flow value is larger than or equal to the water flow safety threshold value, the anti-freezing control device controls the normal operation of the heat pumpunit. According to the relation between the current water flow value and the water flow safety threshold value, the frost cracking condition of the whole pipeline of a water outlet pipe is judged, and the operation stability and reliability of the heat pump unit are improved.

The invention provides a coiled tube anti-frost-cracking system used for an air conditioner with double heat sources. The coiled tube anti-frost-cracking system comprises an air conditioner coiled tube, a water inlet pipeline, a water outlet pipeline, and further comprises a dewatering branch, a ventilating branch, an inlet water temperature sensing device, an outlet water temperature sensing device and a controller, wherein the dewatering branch is arranged near an inlet of an air conditioner coiled tube; the ventilating branch is arranged near an outlet of the air conditioner coiled tube; the inlet water temperature sensing device is arranged near a water inlet pipeline at an inlet of the air conditioner coiled tube; the outlet water temperature sensing device is arranged on the ventilating branch; the controller is used for controlling, according to a user's instruction and a temperature measured by the inlet water temperature sensing device and the outlet water temperature sensing device, water feeding, water discharging, dewatering and gas exhausting. According to the coiled tube anti-frost-cracking system and the coiled tube anti-frost-cracking method for the air conditioner with double heat sources as well as the air conditioner with double heat sources, the dewatering branch, a dewatering valve, a gas exhausting branch and a gas valve are additionally arranged to timely exhaust water in a fan coiled tube, so that the coiled tube frost-cracking is effectively prevented. Meanwhile, during operation of a heating mode, water in the coiled tube is not heated for a second time, so that energy-saving effect can be achieved.

The invention discloses an automatic drainage frost crack prevention water heater which comprises a shell. A temperature controller, a fuel gas proportional valve, a controller, a yielding water temperature problem, a water outlet, an air inlet, a water yield adjusting knob, a water inlet, a drainage outlet, a drainage electromagnetic valve, a water flow sensor, a burner, a heat exchanger, a windpressure switch and a draught fan are sequentially arranged inside the shell from the upper left portion to the upper right portion. Compared with the prior art, the automatic drainage frost crack prevention water heater is additionally provided with the automatic drainage electromagnetic valve on the basis of an original water heater, when the air temperature is too low in winter, the water heater can automatically sense the outdoor temperature after the water heater is used, sensing signals are transmitted to the drainage electromagnetic valve, the electromagnetic valve moves to start drainage, automatic closing is achieved after drainage is completed, and the effect that the water heater cannot be subjected to frost cracking at the temperature of zero DEG C is guaranteed. The frost cracking probability of internal parts of the water heater for weather variations is avoided, and the service life of the water heater is greatly prolonged.

The invention belongs to the field of electronics and control technology, specifically relates to a control method for saving energy in water circulating pump in winter. Its specific steps are that preinstall turning frequency, turning delay, the minimum and maximum limit of different temperatures pulse frequency. According to the range of temperature between outlet pipe and return pipe the energy-saving control cabinet adopts the PID algorithm to adjust pump operation frequency, when the pump operating frequency is lower than the turning frequency and the break over delay, and then pump operation frequency will be adjusted to the temperature maximum pulse frequency, and maintain a maximum delay time; pump operation frequency is higher than turning frequency and then adjusting by PID regulator; If the pump operating frequency below the turning frequency after adjustment, returning to the steps at the beginning of re-operation; if operation frequency higher than the break over frequency, entered the PID regulator. The invention adopts pulse working to prevent the water pump electricity motor works in the lower frequency limit for long hours, which cause the pipeline freezing and frost cracking because the end of pipeline can't bear under lower temperature long time and couldn't achieve consumer need. To the PWM technology application, the heating temperature is able to adjust heating temperature real-time in accordance with outdoor free air temperature.