386results about How to "Prevent frost cracking" patented technology

A method for cleaning sewage by vertical undercurrent type artificial wet land in northern area features that a scientific microbe carrier network consisting filler layers, insulating reproduction layer, etc is disclosed for fast forming a biomembrane system for playing its cleaning role without plants in the winter, a deeply buried multi-layer water tube network can prevent freeze and cracking, and more insulating techniques are used to keep the temp of sewage to be treated to 15-20 deg.C.

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 a quick-frozen dumpling in soup which can prevent soup from blending, the method for preparing the skin of the dumpling in soup is to putting the powder of 100 units for preparing the dumpling block into basin, adding edible glue 0.1-30 units, mixing them uniformly, adding water of 15-40 units to make flour dough, then choosing the stuffing material for dumpling, making dumpling according to the ratio of 0.5:1-3:1 between skin and stuffing, quick freezing under temperature not below five Deg C below zero, and storing. Because of the containing of edible glue, the dumpling is characterized by preventing soup from blending, the shape maintaining during boiling, and the taste equal to that of not frozen.

The invention discloses a heat-conducting medium, comprising the following components of, by weight, 65-90 parts of ethylene glycol or propylene glycol, 15-30 parts of water, 0.15-2.0 parts of sodium benzoate, 0.15-1.5 parts of methyl benzotriazole, 0.35-1.2 parts of sodium molybdate, 0.15-1.0 part of potassium hydroxide, 0.8-1.5 parts of methanol, 0.8-1.2 parts of silicone oil, 0.15-0.7 part of triethanolamine or diethanolamine or monoethanolamine and 0.55-1.5 parts of sodium nitrate or magnesium nitrate. The heat-conducting medium provided by the invention can increase heat efficiency of a boiler, reduce or eliminate corrosion of the heat-conducting medium to a boiler liner or a heat supply system and increase the heat efficiency by 7-10%, without producing precipitates such as water scale and the like. The heat-conducting medium can prevent phenomenon of frozen cracks of equipment when heat is supplied in winter. Besides, the heat-conducting medium provided by the invention is not volatile and is a semi-permanent liquid that can be used for a long time after one time injection.

The invention discloses an instant hot constant temperature solar energy hot-water system comprising a heat collecting pipe, a water storage tank, an upper water pipe, a lower water pipe, a cold water inlet, a hot water outlet, an electromagnetic valve and a three-way valve, wherein, a meter controller is connected in series between the three-way valve and the hot water outlet; the water storage tank is provided with a water tank water level sensor and a water tank temperature sensor; and the meter controller is provided with a heater, an inlet temperature sensor, an outlet temperature sensor and a flow sensor to distinguish a concentration control system in an electric connection meter controller. The instant hot constant temperature solar energy hot-water system monitors the solar energy heater by utilizing the meter controller with the heater and a plurality of sensors; when the water temperature is not high enough, the heater is automatically started to rapidly heat the lower water, thus ensuring the effluent water to achieve the use temperature; when the water temperature achieves the requirement, the heater is closed, thus saving the energy sources; and when the outside air temperature in winter is too low, the pipe wall heater is automatically started, so as to prevent the water pipe from being frozen to crack, thus leading the solar energy water heater to operate all the time, and making fully use of the solar energy sources.

The invention discloses a solar energy full-year collection and storage supply system which comprises a solar collection system and a heating and refrigerating system connected with the solar collection system, wherein the solar collection system comprises a solar thermal collector and a thermal storage system, the thermal storage system is a buried U-shaped pipe arranged underground, and the solar thermal collector is connected with a thermal storage system in the underground soil of a building; the heating and refrigerating system is connected with the solar thermal collector and the thermal storage system, and the heating and refrigerating system comprises a heating and refrigerating fan coil system and a floor radiation heating system; and the solar collection system and the heating and refrigerating system are connected with tap water. The solar energy full-year collection and storage supply system has the advantages of low cost, high efficiency, long service life, increased heating efficiency and reduced cost.

The invention provides a water divider temperature control system with an antifreezing function, belonging to the technical field of heating equipment in construction industry. The water divider temperature control system is characterized in that a stepping motor is arranged on a support in a temperature control valve; the output shaft of the motor is connected with a screw, and the screw is in threaded connection with the upper part of a linkage piece to automatically control opening and closing of the valve; if the ambient temperature is lower than the memory temperature of a memory alloy, the memory alloy shrinks; and under the push of a reset spring, a magnet ring bush moves upwards, and then the valve is open, thus avoiding an indoor radiator or a pipeline freezing crack.

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 relates to the technical field of air conditioning devices used in civil and industrial projects, in particular to an all-air air conditioning set containing all cold sources and heat sources and preparing cooling mediums or heating mediums simultaneously. The air conditioning set comprises a cooling or heating source unit, an externally-output cooling or heating medium unit, an all-air conditioning set and a cold or heat source unit, wherein the cooling or heating source unit prepares the cooling mediums or heating mediums and provides all cooling capacities or heating capacities for the air conditioning set to treat the air heat and humidity load, and no access to other external cold sources and heat sources is required; the externally-output cooling or heating medium unit can output the cooling mediums or heating mediums which treat freezing mediums as carriers toward the exterior, and the cooling mediums and heating mediums are not needed to be arranged additionally in other refrigeration zones or heating zones; the all-air conditioning set can conduct cooling and dehumidification treatment or heating and humidification treatment to fresh air and mixed air; the cold or heat source unit comprises a compressor, an expansion valve and a freezing medium circulation pipeline. According to the all-air air conditioning set, through the novel research and development of an equipment framework theory, the problems that in conventional air conditioning systems, the constitution is complex, a primary air system is independent, and a small local air conditioner cannot be arranged independently are solved.

The invention discloses a refrigerating and heating comprehensive supplying system of a solar air conditioner. The system comprises a solar water heating barrel which is connected with a solar water heater; an absorption type refrigerator is connected with an air source heat pump set through a pipeline; the air source heat pump set is connected with a heating water tank; the heating water tank isconnected with the solar water heating barrel; the absorption type refrigerator, an infrared water heating furnace and the solar water heating barrel are respectively connected with a heat exchangingdevice indoor; the solar water heater, the infrared water heating furnace, the absorption type refrigerator and the heat exchanging device are respectively connected with a controller through leads; the controller is connected with a power supply; and the power supply is respectively connected with a capacitive electric accumulator and a photovoltaic solar panel through an inverter. According to the invention, through combining the absorption type refrigerator and the solar water heating devices, the utilization ratio of solar energy in refrigeration is greatly improved; since the infrared water heating furnace is used as an auxiliary heat source, the electricity-heat conversion efficiency is high, the heat transfer density is high, the heat transfer speed is high, the loading property ishigh, compared with the prior art, the refrigerating and heating comprehensive supplying system greatly reduces the energy source consumption greatly.

The invention discloses an anti-freezing pressurized gas water heater. The anti-freezing pressurized gas water heater comprises a gas water heater shell body, a heat exchanger installed in the gas water heater shell body, a coiled pipe wound on the heat exchanger, a water inlet pipe and a water outlet pipe which are connected with the coiled pipe, and an anti-freezing heating body arranged on the coiled pipe. The anti-freezing pressurized gas water heater is characterized in that a bypass pipe, an electric three-way valve and a booster pump are further arranged in the gas water heater shell body, the water inlet pipe is communicated with the water outlet pipe by the bypass pipe through the electric three-way valve, the water inlet pipe, the coiled pipe and the water outlet pipe form a circulation loop, and the booster pump is arranged on the circulation loop; and a temperature probe is further arranged on the heat exchanger or the coiled pipe, and the anti-freezing heating body, the electric three-way valve, the booster pump and the temperature probe are all connected with a gas water heater main controller. The anti-freezing pressurized gas water heater disclosed by the invention is simple in installation structure; and moreover, water flow is cooperated with the anti-freezing heating body to heat while flowing in a closed-loop pipeline, the water flow is uniformly heated, and double anti-freezing effect is acted, so that the coil pipe of a water-stopping box is effectively prevented from frost cracking.

The invention discloses a water flow sensor and a fuel gas water heater. The water flow sensor comprises a shell. The shell is provided with a Hall flowmeter component. A pressure relief channel is arranged on the shell, the pressure relief channel has a left section and a right section, a piston is arranged in the pressure relief channel, the piston is arranged between the left section and the right section, the left section is connected with an inner cavity of the shell, an elastic component is arranged in the right section. A right side of the right section is provided with an end cover, the end cover is detachably connected to the shell, and the end cover is provided with a venting port. When water in a waterway of the fuel gas water heater freezes and expands outwardly, because a freezing process is a slow process, an ice cube is squeezed towards the piston, the squeezed piston moves to the right, air in the right section is vented to the outside air through the venting port, an enough space is released for the expanded ice cube so as to prevent the shell from being frosted and cracked or the Hall flowmeter component from being damaged, and a protection effect can be achievedunder a condition that the water heater is power off.

The invention discloses a low-clinker high-impermeability field floor hardening material based on dry process desulfurized fly ash. The material comprises, by volume, 10-40 parts of blast furnace slag, 5-45 parts of converter steel slag, 0.1-40 parts of sandy soil, 5-20 parts of sintered desulfurized ash, 5-8 parts of slag powder, 1-2 parts of cement, 0.1-2 parts of an additive and 12-13 parts ofwater. Batching, stirring, paving, rolling and curing construction are carried out in sequence on the components, thus obtaining the low-clinker high-impermeability field floor hardening material. Theinvention adopts blast furnace slag, converter steel slag, sintered desulfurized ash and sandy soil as the main raw materials, and takes an appropriate amount of slag powder and a small amount of cement as the auxiliary materials, the obtained field floor hardening material has a strength grade up to C10-C25, and can replace low-strength grade concrete for application to floors of factories and mines, storage yards and construction sites and roadbases.

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 provides a control method for a forcible-discharge gas water heater. The control method for the forcible-discharge gas water heater comprises the following steps: a temperature in a heatexchanger is detected through a first temperature sensor, and temperature data is fed back to a controller in real time; when the first temperature sensor detects that the temperature in the heat exchanger is lower than a set value of a program, the controller starts a fan or an electric heating assembly, or starts the fan and the electric heating assembly sequentially, or starts the fan and theelectric heating assembly simultaneously, the fan discharges cold air in the vicinity of the heat exchanger from a smoke discharge channel, and the electric heating assembly heats the heat exchanger;after the fan and the electric heating assembly runs in a set time, if the first temperature sensor detects that the temperature in the heat exchanger is higher than the set value of the program, thecontroller turns off the fan and the electric heating assembly, and the gas water heater enters a standby state again; and if the first temperature sensor detects that the temperature in the heat exchanger is still lower than the set value of the program, the controller turns off the fan and the electric heating assembly, and starts a freezing alarm program.

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 solar water heating system with a ceramic sun panel operated and controlled by single water pump. The system consists of a ceramic solar heat collector, a lower circulation pipe, a water pump, a temperature-conservation heat storage water tank, an upper circulation pipe, inlet and outlet air pipes, a heat collector temperature sensor, a water tank temperature sensor and a controller; the circulation system of the solar water heating system of the ceramic sun panel is not provided with any valve so as to ensure the water channels and gas channels to be unimpeded under any condition; and the outlets of the inlet and outlet air pipes are 0.5-2 meters higher than an upper collection pipe. When the temperature in the ceramic solar heat collector reaches the set temperature delta A, the controller orders the water pump to be started, and when the temperature in the ceramic solar heat collector reaches the set temperature delta B, the water pump stops working, the ceramic solar water heating system can not be frozen to be cracked under any condition, the problem of great heat loss in hot water can not happen, and the system has a simple structure and low cost.

The invention discloses a comprehensive cold / heat air supply system of a solar air conditioner, which comprises a solar hot-water bucket, and the solar hot-water bucket is connected with a solar water heater by a first circulation pipeline, respectively connected with an infrared water heater and an absorption refrigerator by pipelines, and connected with a heat transfer device arranged indoors by a pipeline; the heat transfer device is respectively connected with the solar hot-water bucket and the infrared water heater by return water pipes; the solar water heater, the infrared water heater, the absorption refrigerator and the heat transfer device are respectively connected with a controller by guide lines; and the controller is connected with a power supply. The comprehensive cold / heat air supply system has the advantages that through combining the absorption refrigerator with the solar water heater, the utilization ratio of solar energy is greatly improved in the aspect of refrigeration; through taking the infrared water heater as an auxiliary heat source, the comprehensive cold / hot air supply system is high in electro-thermal transfer efficiency, large in heat transfer density, quick in speed, and strong in load performance; and compared with the prior art, the energy consumption is greatly reduced.

The invention provides a heating control method of a gas water heater. The heating control method is characterized by comprising the following steps of: 1, waiting; 2, judging whether hot water is required or not, if so, performing step 5, and if not, performing the next step; 3, detecting whether at least one of the temperature of inlet water and the temperature of outlet water is less than T0 ornot, if so, starting an anti-freezing heating module, and if not, returning to the step 1; 4, detecting whether the temperature of the inlet water and the temperature of the outlet water is simultaneously greater than T1 or not, if so, performing the next step, and if not, returning to the step 1; 5, calculating the heating yield Q; 6, judging whether Q is less than Qmin or not, if so, performingthe next step, and if not, heating by using gas; 7, adopting the anti-freezing heating module; and 8, comparing the outlet water temperature with Tf (time temperature), and adjusting the heating power of the electric heater according to various conditions. The heating control method has the advantages that an electric heater block capable of adjusting the heating power is adopted, so that the problem that the target temperature cannot be reached by small-load combustion in summer is solved, and the temperature adjusting range of the gas water heater is enlarged on the premise that the load area of the gas water heater is not artificially widened.

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 a modified water-separating damper for a water inlet of a covered pipe of a cooler. The modified water-separating damper comprises a cooling pipe and is characterized in that the cooling pipe is provided with a water-separating damper body mounted on the front lateral part of the cooling pipe. The water-separating damper body comprises a front cover recess plate and a back cover plate, a plurality of water outlets are evenly distributed in the back cover plate, the water inlet pipes are connected to the front end face of the front cover recess plate and communicated with the same, dampers are mounted in the middle positions inside the front cover recess plate and welded on the inner side of the front cover recess plate, and face to the water inlet pipes. According to the arrangement,the inflowing water firstly impacts on the dampers, and then evenly impacts on the whole covered pipe inside; since the water does not impact directly on the cooling pipe, impact force generated is greatly reduced, impact on welding points of the cooling pipe inside is further greatly reduced, and service life of equipment is thus prolonged.

The invention discloses a heat collecting module of a metal-glass sheathing heat collecting pipe, belonging to the field of the solar thermal energy utilization technology. The current all-glass vacuum heat collecting pipe is not pressure-bearing, is easy to be explosive and is not anti-freezing, thereby being difficult to be applied to a heat collecting project; a selective heat absorption coating layer (a magnetron sputtering vacuum coating film) of the heat collecting pipe inner pipe outer surface of a vacuum heat pipe is easy to fall off under long-term basking. A vacuum glass pipe in the invention is the heat collecting module of the metal-glass suit heat collecting pipe, which does not contact working medium and is pressure-bearing and antiseptic and has high heat absorption efficiency and low heat emissivity. The heat collecting pipe comprises a glass vacuum heat preservation pipe and a metal heat collecting pipe, the heat collecting pipe is arranged in the glass vacuum heat preservation pipe, the outer surface of the heat collecting pipe is plated with copper chemically and a black nickel layer is electroplated after copper plating is carried out. Meanwhile, a flow channel blind plate is additionally arranged in a water filling circulating flow channel to separate cold and hot water working medium, and the water filling circulating flow channel is directly connected with a water filling pipe to guide cold water to directly reach the bottom part of the metal heating collecting pipe; and a new pressure-bearing connection type of connecting a collecting pipe and the heat collecting pipe is provided.

The invention discloses a direct heat-supply system adopting mine water waste heat. According to the system, mine water is directly adopted for supplying heat to a mine wellhead in winter, it is guaranteed that the air mixing temperature of the mine wellhead is not lower than 2 DEG C, and freezing of side spraying water in an air inlet shaft of a mine is prevented. The system comprises devices ofsubmersible sewage pumps, a quartz sand filter, plate-type heat exchangers, circulating water pumps, a softened water device and a low-temperature-type wellhead heating unit. Compared with the heat-supply modes of traditional coal-fired boilers of coal producing enterprises, according to the system, only a small amount of electric energy is consumed, the automation degree is high, and the operation cost is extremely low; emission of waste gas, waste water and solid waste is completely avoided, and cleanliness and reliability are achieved; and on the premise of effectively guaranteeing safety production of a mine lot, the mine water waste heat resource is fully utilized, and the mine lot is assisted to achieve environment-friendly production.

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 present invention discloses a double-pipe type solar water-heater. Its waterway is divided into upper and lower two water pipes, on the upper water pipe a water-supplying electromagnetic valve and a temperature-measuring probe are mounted, the electroheater in the water tank is controlled by temperature control regulation instrument, on the lower water pipe are successively mounted a pipe electroheater, booster pump and hot water valve, between upper water pipe and lower water pipe a circulation pipeline is connected so as to form a loop, the circulation electromagnetic valve is mounted on the circulation pipeline. Its electric circuit portion includes temperature-measuring probe, temperature sensor, temperature control regulation instrument, level sensor, electromagnetic valve, booster pump and automatic control instrument, etc. Besides, said invention also provides its working principle and its concrete operation method.

The invention provides an anti-freezing fan coil assembly. The anti-freezing fan coil assembly comprises at least one coil pipeline, a water inlet device and a water outlet device, wherein the water inlet device communicates with inlets of all the coil pipelines, and the water outlet device communicates with outlets of all the coil pipelines. The water inlet device is provided with a venting valve, and the water outlet device is provided with an air inlet valve. The venting valve and the air inlet valve are selectively and synchronously opened or closed along with the temperature of an external surface air cooler. According to the fan coil assembly, water in a coil can be automatically drained completely when the air temperature is low, and thus the fan coil can be protected against frost cracks under the condition that the fan coil is not in use in winter.

The invention discloses an anti-blocking and anti-freezing two-cavity sink for a kitchen. The sink comprises a large cleaning cavity and a small cleaning cavity. The large cleaning cavity and the small cleaning cavity are located on the left side and the right side of the sink for the kitchen respectively. Water outlet slot ways are arranged in the large cleaning cavity and the small cleaning cavity respectively and provided with garbage filter nets. The upper portions of the garbage filter nets are provided with drainage valves. The lower end of the large cleaning cavity and the lower end of the small cleaning cavity extend to be provided with drainage pipes. The other ends of the drainage pipes are in sealed connection with a connecting piece. The lower end of the connecting piece is fixedly connected with a garbage processing device. The garbage processing device is communicated with a water outlet pipe through a deodorization bent pipe. Protruding waterproof flanges are arranged on the periphery of the sink for the kitchen, and the side face of the small cleaning cavity is provided with multiple containing grooves. The sink for the kitchen is provided with the garbage processing device, garbage can be smashed and discharged, the drainage pipes of the sink for the kitchen are anti-freezing drainage pipes, hollow layers in the drainage pipes are provided with heating resistance wires, and therefore the drainage pipes can be protected against frost cracking in cold weather.

The invention discloses an air conditioner and a defrosting method thereof and relates to the field of air conditioning. The defrosting method is used for realizing defrosting without lowering the comfort. The air conditioner comprises a first heat exchanger, a second heat exchanger and spraying heads, wherein the spraying heads communicate with the fluid of the first heat exchanger, a pipeline is arranged between the spraying heads and the first heat exchanger, and a drain valve is arranged at the lowest part of the pipeline. According to the technical scheme, by arranging the drain valve, the drain valve is opened for draining accumulated water in the pipeline after defrosting is completed each time, the pipeline is protected against frost splitting, and therefore the use range of the air conditioner defrosted through hot water is expanded, and the air conditioner can be applied to cold areas.

The invention discloses a novel single-row tube bank for cooling air, which comprises a base tube and fins, wherein the fins are arranged on the upper surface and the lower surface of the base tube, the base tube is a rectangular flat tube with chamfers, the base tube and the fins are welded together through whole soldering, the fins are shapes-shaped, and spoiling holes are formed in the fins. The tube bank has the advantages that as the rectangular flat tube with the chamfers is used as the base tube, the effects of shortening the length of the base tube, saving materials, facilitating cleaning, ensuring heat exchange intensity, reducing stress concentration phenomenon, greatly improving rigidity and protecting the deformed base tube from frost-breaking in winter are realized; and as the spoiling holes are formed in the traditional S-shaped flat fins, the laminar flow state of the single-row tube bank during heat exchange is destroyed by the spoiling holes, heat exchange is carried out on cold air among the fins in a turbulent state, an original boundary layer is destroyed, the uninterrupted exchange of the cold air is enhanced, the convection heat exchange intensity on the side of the fins is greatly increased, the heat exchange efficiency of a heat radiator is improved at the same time, and the heat exchange area of the heat radiator is reduced under the condition of same heat load.