36results about How to "Prevent frost damage" patented technology

The invention discloses a high-efficiency and environment-friendly compound water reducer. The high-efficiency and environment-friendly compound water reducer comprises the following raw materials in parts by weight: 100-120 parts of a polycarboxylate-type water reducer, 8-15 parts of a corrosion inhibitor, 1-5 parts of a defoaming agent, 5-16 parts of an antifreezing agent, 22-35 parts of an initiator and 300-350 parts of water. The high-efficiency and environmental-friendly compound water reducer is prepared by the following steps: adding the polycarboxylate-type water reducer and water into a reaction kettle during preparation, heating to 55 DEG C, and stirring for 30-45 minutes; heating to 90 DEG C, adding the defoaming agent and the initiator, and stirring for 2-3 hours; cooling to 45 DEG C, adding the corrosion inhibitor and the antifreezing agent, and stirring for 0.6-0.8 hour. Concrete prepared from the high-efficiency and environmental-friendly compound water reducer has the beneficial effects that the water-reducing rate is relatively high and exceeds 28%, and the gas content is relatively low; the concrete is applicable to seasons with relatively high or low temperature.

A water source heat pump air conditioner operating system belongs to the field of control devices for water source heat pump air conditioners. It is characterized in that it also includes a computer master controller and a one-way water flow switch; the one-way water flow switch is connected to the computer master controller; the computer master controller is connected to and controls the start and stop of the well water pump and the compressor; the one-way water flow switch is installed On the well water inlet pipe; the one-way water flow switch can detect the water flow in the well water inlet pipe, and when the detected water flow is lower than the preset value, the computer master controller turns off the well water pump and the compressor. The present invention can ensure the normal use of the above-mentioned air-conditioning circulation system, and at the same time coordinate and control the organic, orderly, scientific and reasonable operation of each component; it can also avoid damage to important equipment such as compressors and well water pumps due to dry burning or frost damage caused by outdoor environments. Damage, prolong the service life and quality of the air conditioning circulation system.

The invention provides a liquid pipeline emptying anti-freezing device. A water injection and drainage electromagnetic valve is arranged at the upper end of a water pipe, a drainage electromagnetic valve is arranged at the lower end of the water pipe, a water supply electromagnetic valve is arranged on the water pipe between the drainage electromagnetic valve and the water injection and drainage electromagnetic valve through a tap water pipe, and a drainage nozzle is arranged on the water pipe. The water injection and drainage electromagnetic valve and the drainage electromagnetic valve are controlled through a drainage electric switch and a water injection electric switch. Because the water injection and drainage electromagnetic valve and the drainage electromagnetic valve are arranged at the upper end and the lower end of the water pipe respectively, an emptying pipe can be communicated with a drainage pipe by the actions of the electromagnetic valves, accumulated water in the waterpipe is drained, and the water pipe is prevented from being frozen. The device has the characteristics of simple structure, reliable operation, convenience, practicability and convenience for control. The device is suitable to be installed in a solar water heater or other device for injecting and draining anti-freezing liquid.

The invention provides a banana interplanting method suitable for the Zhangzhou area. It selects Zhangzhou local variety "Tianbao dwarf banana" and the disease-resistant variety "Nantianhuang" for interplanting, and transplants and plants Tianbao dwarf banana in the field in May every year. Cultivate cup seedlings, and then plant Nantianhuang seedlings at 1 / 3 of the distance between two Tianbao bananas in February of the following year, and cut off 1 / 2 of the stems after Tianbao dwarf bananas are harvested, and then The ripe fruits of Nantianhuang will be harvested from March to April of the next year, and then planted in cycles. The interplanting method of the present invention can not only effectively avoid the damage of typhoon and frost, but also allow different banana varieties to be rotated, so that the varieties with longer growth period can also be "harvested once a year", which can increase the economic income of banana farmers, Improve the utilization rate and output rate of land.

The invention provides an automatic water supply pipe emptier and a solar water heater provided with the automatic water supply pipe emptier. The automatic water supply pipe emptier comprises a drain valve and a water tank, wherein the drain valve comprises an upper fixing rod, a lower fixing rod, a center shaft, a propeller, a spring, a plug piece, a plug piece limit stop and a plug piece connecting rod; a water return pipe is arranged on one side of the top of the water tank; a water supply pipe is arranged at the bottom of the water tank; the top end of the water supply pipe is provided with a solenoid valve; the bottom end of the water supply pipe is provided with a water supply valve; the water supply pipe between the drain valve and the solenoid valve is provided with a connecting pipe; one end of the connecting pipe is communicated with the upper end of the water tank. The automatic water supply pipe emptier has the beneficial effects that the automatic water supply pipe emptier is simple, practical, low in manufacturing cost, convenient to mount, simple in structure, safe to use and easy to promote, and the water supply pipe can be prevented from being frozen off or cracked through a simple device; meanwhile, water cannot be remained after the water supply pipe supplies water, and the phenomenon that water resource is wasted by draining water before hot water is used is avoided.