215 results about "Heating cycle" patented technology

The invention belongs to the technical field of refrigerants, and provides a mixed refrigerant for replacing R290 and a preparation method and application thereof, the mixed refrigerant comprises a first component, a second component and a third component; the first component is trans-1, 2-difluoroethylene, the second component is 2, 3, 3, 3-tetrafluoropropene, and the third component is trifluoromethyl methyl ether; compared with R290 refrigerants in the prior art, the mixed refrigerant has the advantages that flammable and explosive components do not exist, and high-risk combustible gas clusters cannot be formed due to density layering after leakage, so that the mixed refrigerant has high safety performance, and the safety level can be not lower than A2L; the mixed refrigerant has the environment-friendly characteristic of low GWP, the GWP is smaller than or equal to 150, and the environment-friendly requirement is met; the thermophysical property and the refrigeration and / or heating cycle performance of the mixed refrigerant are similar to or better than those of R290; the mixed refrigerant can be used for directly replacing an R290 refrigerant.

The invention discloses a special composite enamel coating for a chromium-nickel alloy base material and a preparation method of the special composite enamel coating, when the special composite enamel coating structurally comprises one layer, the special composite enamel coating comprises the following components in parts by mass: 40-65 parts of a basic glass phase, 30-55 parts of a high-melting-point ceramic reinforced phase, 2-10 parts of a thermal expansion coefficient regulator and 0.5-5 parts of an interface bonding accelerant. Compared with the prior art, the enamel coating can achieve nearly perfect thermal expansion coefficient matching with a chromium-nickel alloy matrix, a tough chemical bonding interface is formed, the enamel coating can stably work for a long time in the extreme high-temperature environment of 1,100 DEG C or above, and meanwhile the enamel coating has the excellent abrasion resistance, repeated rapid cooling and rapid heating cycle resistance and thermal shock resistance.

The invention discloses an air energy-soil composite heat pump cross-seasonal energy storage and winter combined heating system and an application method, and relates to the technical field of building energy conservation. Comprising the following steps: acquiring quantitative data of heat unbalance; when a heat unbalance phenomenon exists, determining a soil initial temperature and a maximum rising temperature before heat compensation, and calculating a heat compensation amount; determining a heat compensation operation time period and a system type selection of an air source heat pump; determining an initial rising temperature, a heat compensation initial investment and a preset age limit; the operation cost is determined, when the number of times of heat compensation is larger than a preset year limit, the sum of the initial investment of heat compensation and the operation cost within the preset year limit is recorded, and when it is detected that the total soil temperature increasing value is not lower than the maximum temperature increasing value, the air source heat pump system is determined again; and the strategy with the minimum operation cost and the minimum initial heat compensation investment is used as the optimal soil heat compensation strategy. The system obviously improves the utilization rate of renewable energy sources, and has the advantages of high energy efficiency, wide adaptability and low whole life cycle cost.

The invention relates to a method for a regeneration of a nitric acid, in which the used nitric acid is fed into a regeneration device that comprises a heated receiving tank B and a condenser C connected to it and a collection tank D, and where the regeneration is carried out in two stages. The nitric acid to be regenerated fed to receiving tank B in both the first stage and the second stage is heated under vacuum in receiving tank B in two separate heating cycles.

The present application relates to the technical field of microcontroller, and discloses a photovoltaic heating segmented control system based on a microcontroller.The system comprises a photovoltaic power generation module, an energy storage module, a heating module and a control module with a built-in microcontroller, and each module is configured with a standardized quick plug structure.The microcontroller executes a multi-scene segmented control program, which contains temperature threshold driven heating cycle control, energy storage charging and discharging priority segmented scheduling, photovoltaic output winter enhancement logic, valley electricity priority grid auxiliary heating logic and module fault adaptation and tool-free autonomous maintenance logic.The system realizes full-process collaborative segmented scheduling of multi-source energy flow, dynamically matches power according to photovoltaic output attenuation and load fluctuation, maintains continuous operation of the heating loop in extremely low temperature, and realizes autonomous replacement and maintenance of the modules.

The application provides an air conditioner, and belongs to the technical field of air conditioners. In the application, the gas conveying pipeline is coupled with the evaporator and the condenser, and the high-temperature air compressed by the air compressor module is cooled by using the refrigeration and heating cycles of the air conditioner itself. This method can reduce the consumption of additional energy and improve the overall energy efficiency. At the same time, since the molecular sieve has higher working efficiency at a suitable temperature, this design helps to improve the oxygen production efficiency. The air conditioner can automatically adjust the use of the gas conveying pipeline according to the refrigeration mode and the heating mode. This design enables the system to be flexibly adjusted according to the current operation mode, so as to achieve the best cooling effect.

To provide a refrigeration cycle system that can suppress malfunctions of the four-way valve at low ambient temperatures. [Solution] The refrigeration cycle device comprises a four-way valve and a control unit. The four-way valve has a compressor, an indoor heat exchanger, an expansion valve, and an outdoor heat exchanger, and switches the direction of flow of the refrigerant that is circulated by the compressor in a refrigerant circuit and connected to the refrigerant circuit. The control unit controls the compressor and switches between heating operation, in which the refrigerant is circulated in a heating cycle, cooling operation, in which the refrigerant is circulated in a cooling cycle with the opposite flow direction to the heating cycle, and defrosting operation, in which frost has formed on the outdoor heat exchanger due to heating operation is removed in the cooling cycle, by switching the four-way valve. When the control unit receives an operation stop signal and is performing defrosting operation, it stops the compressor after performing heating operation for a predetermined time or longer after the completion of defrosting operation.

The application provides a heat management method and an absorption type combined cooling and heating system, and comprises the following steps: detecting the ambient temperature in a factory building; if the ambient temperature is less than a first temperature threshold, controlling a first three-way valve, a second three-way valve, a third three-way valve, a fourth three-way valve and a four-way valve to switch to a heating switch state respectively, so that the waste heat generated by auxiliary equipment and steam waste heat are used as a heating source for driving a heating cycle, and the heating cycle is completed through a circulating working medium; if the ambient temperature is greater than a second temperature threshold, controlling the first three-way valve, the second three-way valve, the third three-way valve, the fourth three-way valve and the four-way valve to switch to a cooling switch state respectively, so that the steam waste gas and heat absorbed from cooling water in a cooling cycle are used as a heating source for driving the cooling cycle, and the cooling cycle is completed through the circulating working medium. The steam waste gas, a hot water production and distribution system and a cooling water system are integrated as a whole, and the energy utilization rate is improved by switching the operation mode of the whole system.

This invention provides a variable frequency control method, system, computer, and readable storage medium for a heater. The method includes calculating a temperature difference; calculating a heating cycle and a stabilization power based on the temperature difference; determining the heating power of the heater based on the heating cycle; calculating a first airflow rate and a first oil injection rate of the fan based on the heating power; controlling the heater's heating according to the first airflow rate and the first oil injection rate; determining whether the temperature difference is within a preset range; if the temperature difference is not within the preset range, continuing to control the heater's heating according to the first airflow rate and the first oil injection rate; if the temperature difference is within the preset range, calculating a second airflow rate and a second oil injection rate of the fan; and controlling the heater's stabilization heating according to the second airflow rate and the second oil injection rate, thereby achieving variable frequency control of the heater. This invention can significantly reduce the energy consumption of the heater, while achieving heating and temperature stabilization of the heater in the fastest and most energy-efficient manner.

The application relates to the technical field of kitchen equipment, and provides a control method of a cooking utensil, the cooking utensil and a storage medium. The cooking utensil comprises a pressure cavity, an emulsification cavity, a jet hole and a heating piece. The jet hole is communicated with the pressure cavity and the emulsification cavity. The heating piece is used for heating the pressure cavity. The control method comprises the following steps: obtaining a food material quantity in the emulsification cavity; and adjusting a working parameter of the heating piece based on the food material quantity, so that a fluid in the pressure cavity intermittently boils, wherein the working parameter comprises at least one of a heating period and a heating power. The control method of the cooking utensil, the cooking utensil and the storage medium provided by the application can strengthen emulsification of soup liquid.

Electric heating clothing typically includes an electric heater and a battery. Battery energy is finite, and if the battery supplying energy to heat the clothing discharges in extremely cold weather, the user's health and life are at risk. This invention discloses a system for electric heating clothing, comprising means for converting energy present in the surrounding natural environment into electrical energy for heating the clothing and extending its heating cycle. The energy is obtained using one or more means selected from wind-induced vibration, acoustic vibration, ambient air humidity, snow friction generators using snow, temperature fluctuations in ambient air, and the temperature difference between the ground surface temperature and the ambient air temperature.

The utility model discloses a photovoltaic photo-thermal two-stage heat pump system which comprises a photovoltaic photo-thermal system, a first-stage heat pump system, a buffer water tank system and a second-stage heat pump system, an outlet of a heat collector refrigerant pipe of the photovoltaic photo-thermal system is divided into two paths, one path is connected with an inlet in one side of a first-stage evaporator through a first pipeline, and the other path is connected with an outlet in the other side of a second-stage evaporator through a second pipeline. An outlet in one side of the first-stage evaporator is connected to a refrigerant inlet of the heat collector through a fourth valve; the other path is connected to a first path inlet of the second-stage evaporator through a first pipeline, and a first path outlet of the second-stage evaporator is connected with a refrigerant inlet of the heat collector; the first-stage heat pump system comprises a first-stage heat pump heating circulating system and a first-stage heat pump refrigerating circulating system. According to the utility model, the heat pump can be utilized to take away the power generation waste heat of the photovoltaic module in time, and the phenomenon of power generation efficiency reduction caused by overhigh temperature of the photovoltaic module is relieved; the evaporation temperature of the heat pump can be increased through solar energy, the thermal performance of the system is improved, and therefore advantage complementation and gradient utilization of clean energy are achieved.

The application discloses a kind of equipment for studying the stability of MICP mineralization product under dry-wet-freeze-thaw cycle, comprising: soil column test unit, refrigeration cycle system, heating cycle system, temperature monitoring system and water injection unit;Soil column test unit includes temperature guide plate, soil column sample cylinder, heat preservation layer and water permeable plate;Refrigeration cycle system includes refrigeration device, cooling liquid inlet pipe and cooling liquid outlet pipe;Heating cycle system includes heating device, hot liquid inlet pipe and hot liquid outlet pipe;Temperature monitoring system includes temperature sensor and data acquisition equipment;Water injection unit includes water storage tank and peristaltic pump;Soil column sample cylinder is also provided with water outlet for discharging water in soil column sample cylinder.The equipment can simulate the dry-wet and freeze-thaw cycle environment of soil column sample, obtain the stability parameters of soil column sample under the action of dry-wet cycle and freeze-thaw cycle alone or coupling, and evaluate the stability effect of MICP technology in repairing heavy metal pollution, providing theoretical and practical basis.

This application discloses a structure for an integrated heating and cooling refrigeration unit, including an outdoor compressor, an outdoor condenser core, and an indoor evaporator core. It also includes: a refrigeration solenoid valve, with the compressor connected to the condenser core via an outlet pipe, and the refrigeration solenoid valve installed on the outlet pipes of both the compressor and the condenser core; a defrost solenoid valve, with the compressor connected to the evaporator core via an outlet pipe, and the defrost solenoid valve installed on the outlet pipes of both the compressor and the evaporator core; and a suction pressure regulating valve, with the evaporator core connected to the compressor via a return pipe, and the suction pressure regulating valve installed on the return pipes of both the evaporator core and the compressor. This integrated heating and cooling refrigeration unit constructs a highly efficient refrigeration and heating cycle system, achieving rapid switching and stable output of refrigeration and heating functions. This better adapts to the transportation of diverse goods, ensuring cargo quality and safety.

The invention relates to the technical field of air conditioners, in particular to a heat pump air conditioning system. The invention aims to solve the problems of high cost and poor stability caused by the fact that a CO2 heat pump air conditioning system needs to be additionally provided with a liquid storage device. In order to achieve the purpose, the heat pump air-conditioning system comprises a compressor, a first heat exchanger, a second heat exchanger, a third heat exchanger, an ejector, a gas-liquid separator, a heat exchange flow path and the like, in a refrigeration mode, the second heat exchanger and the third heat exchanger are both in a refrigeration cycle, and the demand quantity of refrigeration working media is larger; the liquid refrigerant in the gas-liquid separator can be fully transferred, in the heating mode, only the third heat exchanger is in the heating cycle, the quantity demanded for the refrigerant is small, the redundant refrigerant can be stored in the gas-liquid separator, and therefore the quantity demanded for the refrigerant can be adjusted without additionally arranging a liquid storage device; the cost is reduced, and the operation stability of the system is improved.

Disclosed are systems and methods of a novel framework to improve the performance and reduce resource usage of a water heater. By adaptively stopping the heating of the tank at a lower temperature, which can be predicted by past use to supply adequate hot water (energy), and then heating prior to a learned use demand period, the disclosed systems and methods provide functionality that enables the standby temperature to be optimized for energy loss. Among other benefits, this not only reduces the expenditure of resources, but also improves the accuracy and efficiency of the water heater system.

The application provides a multi-mode energy-saving semiconductor temperature control device and a control method thereof, which comprises a refrigeration system, a circulating liquid system and a PID controller; the refrigeration system comprises a compressor, an evaporator, a three-way valve, a water condenser, an air condenser, a refrigeration quick-opening electromagnetic valve and a hot gas bypass electromagnetic valve; the circulating liquid system comprises a heater and an outlet temperature sensor; the PID controller controls the conduction of the interface of the three-way valve to control the heat exchange switching of the water condenser and an air speed regulator; the PID controller determines an output percentage according to a first temperature value collected by the outlet temperature sensor and a target temperature value; in the case of a first constant temperature control mode, the refrigeration quick-opening electromagnetic valve and the hot gas bypass electromagnetic valve are switched on and off in a refrigeration cycle according to the output percentage; in the case of a second constant temperature control mode, the power-on time of the heater in a heating cycle is controlled according to the output percentage. The multi-operation mode and energy-saving temperature control purposes are achieved.

The utility model provides a heating circulation bin for preparing raw materials of nylon particles, which relates to the technical field of circulation heating and comprises a fixed base, a circulation heating mechanism is arranged above the fixed base and comprises a heating tank, and the outside of the heating tank is fixedly connected with supporting blocks which are symmetrically distributed. The lower ends of the two supporting blocks are fixedly connected with the upper end of the fixed base, a gear circulating pump in the circulating heating mechanism drives materials to circulate in a reciprocating mode, a dynamic heat exchange environment is constructed, in the circulating stirring mechanism, a servo motor works to enable a spiral scraping blade, stirring blades and a variable-diameter spiral piece to cooperatively operate, the spiral scraping blade scrapes off high-temperature materials on the tank wall, and the stirring efficiency is improved. The stirring blades disturb middle-layer materials, heat transfer is promoted, bottom materials are conveyed upwards through the variable-diameter spiral pieces, alternate circulation of inner-layer materials and outer-layer materials is achieved in cooperation with the gear circulating pump, temperature layering is eliminated, it is guaranteed that nylon raw materials are evenly heated, the carbonization deterioration risk is reduced, and the product quality is improved.

The present invention relates to a process for the preparation of crystalline purified terephthalic acid (PTA) having an average crystal size of about 50 to 150 microns, comprising the steps in the following order: a) providing an aqueous PTA solution of a purified terephthalic acid metallized salt (pH 7); b) heating the solution to a maximum crystallization temperature; c) adjusting the pH of the solution to 5; d) subjecting the solution to a cooling-heating cycle to obtain grown PTA crystals, wherein the solution is cooled to a minimum crystallization temperature and then heated to a maximum crystallization temperature; e) adjusting the pH of the PTA solution at the highest crystallization temperature to 1 to 3 for the complete precipitation of crystalline PTA, f) filtering the PTA solution to collect crystalline PTA, g) washing the filtered crystals with cold water, h) drying the crystals.

The invention belongs to the technical field of wall-hanging stoves, and discloses a wall-hanging stove control method and device. The method comprises the steps that the heat exchange duration, the target shower temperature, the shower water flow and the outlet water shower temperature of the current heating period of the wall-hanging stove are obtained, and the outlet water shower temperature serves as the inlet water shower temperature; a first shower load is determined according to the water inlet shower temperature, the target shower temperature, the shower water flow, the specific heat capacity of water, the unit consumption power and a preset load proportionality coefficient, and the opening degree of a proportional valve is controlled according to the first shower load; when the difference value between the target shower temperature and the outlet water shower temperature is continuously within a second preset temperature range and the duration is within a second preset duration range, the current output load is determined according to the opening degree of the proportional valve; and according to the current output load, the target shower temperature, the shower water flow, the specific heat capacity of water and the unit consumption power, the water inlet shower temperature is determined, and the next heating period is started. By adopting the method and the device, the temperature rise of the shower temperature can be accurately controlled.

The application provides an electromagnetic heating device, a cooking utensil and a heating control method. The electromagnetic heating device comprises a rectification filtering module, a zero-crossing detection module, a driving adjustment module, a power switch tube, a resonant heating module and a control module. The rectification filtering module is used for rectifying and filtering an alternating current power supply and supplying the resonant heating module. The zero-crossing detection module is used for detecting a voltage zero-crossing signal of the alternating current power supply. The driving adjustment module is used for providing a driving voltage to the power switch tube so that the power switch tube controls the resonant heating module to work in resonance. The control module is used for, in a first heating period, judging, according to the voltage zero-crossing signal, whether to output a first driving voltage to drive the power switch tube to work before a voltage zero-crossing point of the alternating current power supply by controlling the driving adjustment module; and in a second heating period, outputting a second driving voltage to drive the power switch tube to work by controlling the driving adjustment module. In this way, electromagnetic noise can be continuous during low-power heating.

The utility model relates to the technical field of hot melt adhesive recycling equipment, and discloses a hot melt adhesive waste recycling device which comprises a heating box, a box cover is arranged above the heating box, the heating box is composed of an inner shell and an outer shell, the inner shell is arranged on the inner side of the outer shell, a metal hose is arranged between the heating box and the box cover, and the metal hose is connected with the heating box. A valve is arranged on the surface of the metal hose, and a resistance wire heater is arranged on the outer side face of the heating box. According to the waste material recycling device, waste materials are added into the heating box through the feeding pipe, then the resistance wire heater is started, heating oil between the inner shell and the outer shell is heated, then the heating oil is pumped to the box cover and the main mandrel under the action of the centrifugal pump and finally flows back to the position between the inner shell and the outer shell, and in the flowing process, the waste materials are recycled. The hot melt adhesive is heated in the inner direction and the outer direction, the heat transfer time is shortened, the temperature rising speed of the hot melt adhesive waste is increased, the heating period is effectively shortened, and therefore the production efficiency is improved.

A pneumatically driven cryogenic refrigerator, primarily operating on a Gifford-McMahon (GM) cycle, switches from cooling to heating via a switching valve between a rotary valve and a drive piston that causes the displacer to reciprocate. The rotary valve has ports at two radii: one circulates flow to the displacer, and the second circulates flow to the drive piston. Both ports circulate flow to the top of the drive piston; the "cooling" port optimizes the cooling cycle, while the "heating" port provides a good heating cycle. The switching valve that changes flow from one port to the other can be linearly or rotary actuated. The rotary valve does not reverse direction.

The present application relates to a refrigeration and heating cycle system capable of producing multiple water temperatures, comprising an external medium, a first heat exchange mechanism and a second heat exchange mechanism for heat exchange between the refrigerant for internal circulation and the external medium, a plurality of compression mechanisms, a plurality of expansion mechanisms, a plurality of intermediate heat exchange mechanisms and a refrigerant pipeline arranged between the two mechanisms, the refrigerant pipeline being used to connect the above-mentioned mechanisms into a refrigerant circulation loop; the first heat exchange mechanism adopts an endothermic module, the second heat exchange mechanism adopts an exothermic module, and the intermediate heat exchange mechanism adopts one of the endothermic module or the exothermic module. Advantage: through multi-stage compression and multi-stage expansion, cooperating with the inter-stage heat exchange of the intermediate heat exchange mechanism, the temperature change curve of the refrigerant can closely follow the temperature slip of the external medium, greatly reducing the irreversible temperature difference loss in the heat exchange process, and at the same time breaking the temperature level limitation of the traditional system, a set of system can meet the demand for deep cooling, normal temperature water, high temperature hot water and high pressure steam in industrial production.

The dual one-way valve bidirectional throttling post-heat exchanger air conditioner water heater of the present invention includes: a compressor, a four-way valve, indoor and outdoor heat exchangers, a hot water heat exchanger, two one-way valves, two throttling devices, and a gas-liquid separator; characterized in that: the hot water heat exchanger is placed between the second ports of the indoor and outdoor heat exchangers, and is respectively connected to the second interfaces of the first and second directional flow throttling devices composed of one-way valves and capillary throttling devices; it has three operating modes: hot water production, cooling, and heating; and the cooling circulation pipeline is connected to the cooling process. The sequence is: compressor, four-way valve, outdoor heat exchanger, first check valve, hot water heat exchanger, second throttle, indoor heat exchanger, four-way valve, gas-liquid separator, compressor; the four-way valve switches positions during the heating cycle; in the first operating mode, the heating cycle is executed, the compressor and outdoor fan run, the indoor fan stops, and hot water is produced quickly; in the second mode, the cooling cycle produces cooling gas; in the third mode, the heating cycle provides heating; in the second and third operating modes, the compressor, indoor and outdoor fans all run, and the hot water heat exchanger recovers the subcooled liquid, obviously producing hot water slowly.

The utility model discloses an efficient evaporation device for treating industrial wastewater, which comprises a wastewater inlet pipeline, a device body and a steam pipeline, the wastewater inlet pipeline is arranged on the left side of the device body, the steam pipeline is arranged on the right side of the device body, and the device body is in telecommunication connection with a controller of a production workshop; the device body further comprises an evaporation device and a pollution discharge evaporator, and the evaporation device is arranged on the left side of the pollution discharge evaporator. The device has the function of preventing floating foam coverage from reducing the evaporation efficiency of the device; heating circulation is added, and the heating efficiency of the device is improved; crystallization and precipitation in the device are reduced, the heating efficiency of the device is ensured, and the workload of device maintenance is reduced.

A heat pump system for high-temperature heat source heat capacity characteristics, from driving level, heating level, different configuration and refrigerant four aspects to carry out compound construction multistage compression gradient coupling heating configuration, multistage cascade gradient coupling heating cycle configuration or single compressor intermediate exhaust gradient coupling heating cycle configuration, the heating level is less than or equal to the driving level, and the heating level is at least one;The driving level changes according to the temperature rise of the high-temperature heat source, when the heat source temperature rises, the driving level is increased and the heating level is increased to reduce the heat transfer temperature difference between each level, when the temperature rise is small, the driving level and the heating level are reduced, at this time, the mixed working medium is also changed, so that its temperature glide characteristics match the temperature rise of the heat source.The working medium and the high-temperature heat source enthalpy characteristics gradually approach through the collaborative matching of working medium characteristics and cycle structure, so that the energy efficiency is higher under the condition of large temperature rise and large temperature span, and the energy consumption is greatly reduced.

The present application relates to an air conditioner, belonging to the technical field of air conditioning equipment, the air conditioner comprises: an indoor unit, an air conditioner fan, an indoor heat exchanger, a fresh air fan, an indoor temperature sensor, an aldehyde removal component, an outdoor unit, a formaldehyde sensor, an outdoor temperature sensor and a controller; the air conditioner fan delivers air conditioning air to the indoor; the indoor heat exchanger increases or decreases the temperature of the air conditioning air; the fresh air fan delivers fresh air to the indoor; the aldehyde removal component adsorbs formaldehyde; the formaldehyde sensor detects the concentration of indoor formaldehyde; when the air conditioner runs the formaldehyde removal mode, the outdoor temperature is detected; when the outdoor temperature reaches above the second preset outdoor temperature, the indoor heat exchanger performs a heating cycle to make the indoor temperature reach the second set temperature; the fresh air fan operates to discharge indoor air containing formaldehyde to the outdoor, the formaldehyde sensor detects the indoor formaldehyde content, the higher the indoor formaldehyde content, the faster the speed of the fresh air fan, the speed of the fresh air fan is adjusted according to the indoor formaldehyde concentration, so as to reduce energy consumption.