33results about How to "Reduce the risk of freezing" patented technology

The invention provides a water reducing agent and a preparation method thereof, an antifreeze agent and its use, and concrete, and relates to the technical field of antifreeze. The water reducing agent includes the following raw materials: prenol polyoxyethylene ether and allyl alcohol polyoxyethylene ether, and at least one of acrylic acid and maleic anhydride, wherein the prenol polyoxyethylene ether and the The molar ratio of the allyl alcohol polyoxyethylene ether is 1:(0.5-1). Antifreezes include the aforementioned water reducers and non-oxidizing salts. In the water reducing agent, isoprenol polyoxyethylene ether and allyl alcohol polyoxyethylene ether are used to synthesize the water reducing agent. Workability, when the water reducer is used in antifreeze, because the water reducer has strong early strength properties, it can effectively reduce the use of antifreeze early strength components in antifreeze; antifreeze is safe and conducive to Reducing the alkali content in concrete can effectively reduce the risk of concrete bleeding.

The invention relates to a distributed heat collection and energy storage system with molten salt as the medium, including four subsystems: a heat collection subsystem, a molten salt pipe network, an energy storage subsystem and a heat exchange subsystem. The heat collection subsystem includes a collection The heat module and the heat collection module are connected to the energy storage subsystem through the molten salt pipe network. The molten salt pipe network adopts double pipes of high-temperature molten salt pipes and low-temperature tank and cold molten salt storage tank, the heat exchange subsystem includes a heat exchanger, wherein the hot molten salt in the hot molten salt storage tank exchanges heat with water through the heat exchanger to generate hot steam, and the molten salt after heat exchange The salt becomes cold molten salt, which flows into the cold molten salt storage tank. The invention has strong design innovation, reasonable and clear system design, and effectively solves the problem of molten salt transportation and energy storage in the field of distributed photothermal power generation through unique technology and flow, especially the large-scale molten salt pipe network has freezing blockage The problem of risk ensures the stable and efficient operation of the system.

The invention discloses an anti-freezing system of a natural draft cooling tower and a cooling water temperature controlling method. The anti-freezing system of the natural draft cooling tower comprises a cooling tower body and a fin-tube type air-water heat exchange system. The fin-tube type air-water heat exchange system comprises air deflectors, fin-tube type air-water heat exchangers, louver type adjusting dampers and a temperature monitoring module. The air deflectors divide an air intake cavity into air heater areas and non-heating areas which are alternate. The fin-tube type air-water heat exchangers are arranged in the air heater areas, and the heat ends of the fin-tube type air-water heat exchangers are connected with a heat cycle water phase of a steam condenser of a steam turbine generator set through water inflow adjusting valves. Air inlets of each air heater area and each non-heating area are both the louver type adjusting dampers controlled by drive motors. The temperature monitoring module comprises an air temperature sensor and a cooling water temperature sensor. The anti-freezing system of the natural draft cooling tower effectively solves the anti-freezing safetyproblem in cold seasons of the natural draft cooling tower and enables the outlet water temperature of the cooling tower to be controlled according to the optimal parameters of cold end optimized operation of the set, and therefore the environmental resources are fully utilized to improve the economical efficiency of set operation.

The invention relates to a water pump and unit operation control method and device and a water pump system. The water pump and unit operation control method comprises the following steps that operation parameter information of a water pump and a unit are acquired before and after water flow switch protection is generated, according to the operation parameter information of the water pump and the unit, the water flow condition is determined when the water flow switch protection is generated, and the operation state of the water pump and the operation state of the unit are controlled according to the water flow condition. By adopting the water pump and unit operation control method, the water flow condition during water flow switch protection can be effectively distinguished, the unit and the water pump are controlled to adopt different operation strategies based on the different water flow conditions, the control method can enable the unit to be started and operate in an anti-freezing mode under the premise that the unit is not damaged, the risk of freezing of the unit in winter is reduced, and the economic loss of users is reduced.

The invention relates to a novel method for configuring a heat preservation box. The method comprises the following steps of: (1) setting a heat preservation box configuration table; (2) determining conditions when an object to be subjected to heat preservation is transported; (3) selecting a corresponding configuration scheme according to the set heat preservation box configuration table, and determining the type and the number of a coolant, a treatment method and an assembly method; and (4) boxing the coolant and the object to be subjected to heat preservation according to the heat preservation box configuration table, and preparing for transportation, wherein the heat preservation box comprises a box body, a box cover and a box bottom; four side faces of the box body have double-layer structures; the outer layer of each side face is a heat preservation layer, and the inner layer of each side face is an isolation layer; and an insertion slot is formed between the inner layer and the outer layer. According to the novel method for configuring the heat preservation box, the temperature of the heat preservation box can be controlled flexibly according to a requirement instead of being influenced by the season and the change of the ambient temperature; furthermore, medicines and the coolants can be separated from each other; the coolants are put at fixed positions; the coolants and the medicines are easy to package; therefore, the storage or transportation safety of the medicines is guaranteed effectively.

The embodiment of the present invention provides a multi-connected air-conditioning floor heating system and its antifreeze control method, which relate to the field of air conditioning technology and can solve the problem of refrigerant leakage caused by the blockage of the throttling element of the floor heating water module in the prior art, thereby causing the problem of the floor heating water module. The problem of the heat exchanger being damaged by freezing. The antifreeze control method includes: obtaining the difference between the return water temperature or the outlet water temperature of the floor heating water module and the temperature of the refrigerant liquid pipe of the floor heating water module, and the closing time of the throttling element of the floor heating water module; when the return water temperature or the outlet water temperature When the difference between the temperature of the refrigerant liquid pipe and the temperature of the refrigerant liquid pipe is greater than or equal to the first preset threshold, and the closing time of the throttling element is greater than or equal to the second preset threshold, the water pump of the floor heating water module is controlled to turn on, and the throttling element is controlled at the same time. throttling according to the opening degree; or, control the water pumps of the heating unit and the floor heating water module to turn on. The invention is used for antifreezing of floor heating water modules.

The invention discloses an anti-freezing method and a device of a water cooling threaded rod unit and the water cooling threaded rod unit. The method includes the following steps of acquiring the temperature of cooling water in the water cooling threaded rod unit and the temperature of freezing water in the water cooling threaded rod unit; judging whether the temperature of the cooling water is less than the first cooling water temperature threshold value or not, and meanwhile judging whether the temperature of the freezing water is less than the first freezing water temperature threshold value or not; when the fact that the temperature of the cooling water is less than the first cooling water temperature threshold value is judged, controlling a cooling water pump of the water cooling threaded rod unit to start, so that the cooling water in the water cooling threaded rod unit is in a flow state; and when the fact that the temperature of the freezing water is less than the first freezing water temperature threshold value is judged, controlling a freezing water pump of the water cooling threaded rod unit to start, so that the freezing water in the water cooling threaded rod unit is in a flow state. According to the method, when the temperature of the cooling water or the freezing water in the water cooling threaded rod unit is too low, the corresponding water pump can be started automatically to make the cooling water or the freezing water flow, so that the risk of freezing is reduced.

The invention discloses a control method and a control device of a windscreen wiper, and a vehicle. The method comprises the steps that gear information of the vehicle and environmental information are acquired; a door lock control signal is received; and according to the gear information, the environmental information and the door lock control signal, a working state of the windscreen wiper can be controlled automatically. In this way, freezing risks of the windscreen wiper can be reduced effectively; a user's use demands can be satisfied; and the user's use experience can be improved.

The invention provides an integrated device and operation method for efficiency enhancement and antifreeze of a photothermal assisted indirect air cooling tower, which includes a multi-flow transparent air duct with a heat storage medium inside, the outlet of which is connected to the inlet of a tapered pipe, and the outlet of the tapered pipe passes through The connecting pipe is connected to the inlet of the air supply pipe. The air supply pipe includes two air outlet branches. The first air outlet is located inside the indirect air cooling tower, close to the inner wall of the indirect air cooling tower, and the air outlet direction is obliquely upward. The second air outlet is located in the air cooling cooling tower. Above the triangular area formed by the device and the louvers, the air outlet direction is vertically downward; it also includes a first temperature sensor, a second temperature sensor and a third temperature sensor, respectively measuring the air temperature T inside the indirect air cooling tower a1 , Air temperature T at the air inlet of the air-cooled radiator a2 , The air temperature T before the bifurcation of the two outlet branch pipes of the air supply duct a3 . The invention can not only improve the cooling capacity of the indirect air-cooling tower under the summer working condition, but also reduce the antifreezing pressure of the radiator of the indirect air-cooling tower under the winter working condition.

The present invention provides a molten salt heat storage system for a solar thermal power station, the molten salt heat storage system comprising: a high temperature molten salt storage tank (1), a mixer (7), a preheater (4), Low-temperature molten salt storage tank (2), mirror field (13) and multiple pipelines; the technical solution provided by the present invention uses a mixer to mix the high-temperature molten salt in the high-temperature molten salt storage tank with the low-temperature molten salt at the outlet of the steam generator , which increases the temperature of the molten salt entering the inlet of the preheater and reduces the risk of freezing of the preheater due to factors such as load adjustment and the environment; The salt is mixed, which increases the temperature of the molten salt flowing into the mirror field pipeline, increases the margin for safe operation of the molten salt in the mirror field circuit at night, and reduces the risk of molten salt freezing in the mirror field circuit. The technical scheme provided by the invention reduces the self-consumption power for heat tracing of a photothermal power plant and improves the economic benefits of the power plant.