32results about How to "Avoid frequent defrosting" patented technology

The invention relates to a control method and system for defrosting judgment of an air conditioner. The control method for defrosting judgment of the air conditioner comprises the following steps that S1, the continuous operation time T in a heating mode state is collected; S2, whether the continuous operation time T is lager than or equal to a target time T1 is judged, the step S3 is executed if yes, and the step S1 is executed again if not; S3, whether the current temperature Tt of a condenser coiler is smaller than a target temperature Ta or not is judged, the step S4 is executed if yes, and the step S2 is executed again if not; S4, operation in the defrosting mode is controlled according to the dropping speed of the temperature of the condenser coiler. According to the control method and system for defrosting judgment of the air conditioner, whether defrosting is needed for a condenser or not is judged by dynamically acquiring the dropping speed of the temperature of the condenser coiler, the thickness of a frost layer can be intelligently and accurately reflected by the dropping speed of the temperature of the condenser coiler, and the problems that due to the fact that the defrosting mode is started frequently, the heating effect of the air conditioner is affected, fluctuation of the indoor temperature is caused, and use comfort is affected are solved.

The invention provides a defrosting control method and system and a heat pump type air conditioner. The defrosting control method for the heat pump type air conditioner comprises the steps that after a heating operation mode of the heat pump type air conditioner is detected, the operation current of an outdoor fan is detected in real time, and the operation time T1 of a compressor is recorded; whether the operation current is larger than a preset operation current or not is judged, timekeeping is started when the operation current is larger than the preset operation current, and the accumulated operation time T2 of the operation current is recorded; whether T2 is larger than a first preset time value or not is judged, and whether T1 is larger than a second preset time value or not is judged when T2 is larger than or equal to the first preset time value; and defrosting is conducted when T1 is larger than the second preset time value. According to the defrosting control method provided by the invention, the effect that defrosting is conducted through the influences of frosting of the air conditioner on loads of the outdoor fan is achieved, whether the air conditioner needs defrosting or not can be judged correctly, the defrosting speed and defrosting efficiency are effectively improved, and the heating efficiency of the air conditioner is improved.

The invention provides a defrosting control method of an air conditioner and an outdoor unit thereof. In the defrosting control method, a heating index temperature of an indoor unit is continuously monitored; and a mean value of the heating index temperature in a heating time period is calculated according to the heating index temperature. The mean value expresses the mean heating capacity of theair conditioner in the whole heating process; and when the mean value is lowered, an optimal defrosting beginning point of a heat exchanger of the outdoor unit is reached. When the heating index temperature is lower than the mean value of the heating index temperature, the outdoor unit of the air conditioner is defrosted, so that the optimal defrosting effect can be achieved. The defrosting methodcan defrost in the optimal time point, prevents frequent defrosting of the air conditioner to save the energy, guarantees the heating effect of the air conditioner, and improves the use experiences of users.

The invention provides a defrosting judgment method, a defrosting judgment system and an air conditioner. The defrosting judgment method comprises the steps that in the heating running process of the air conditioner, the rotating speed of a draught fan is detected; if the time when the rotating speed exceeds the rotating threshold value is larger than the first preset time, the change rate of the rotating speed of the draught fan is determined; under the condition that the change rate is not negative, the preset condition of the draught fan is determined; if the continuous time when the running parameter of the draught fan meets the preset condition is larger than the second preset time, the air conditioner is subject to defrosting operation. Through the technical scheme, the defrosting condition in the process that no frost exists or slight frosting happens is avoided, and the heating effect is improved.

The invention provides an air conditioner defrosting control method and device as well as an air conditioner. The air conditioner defrosting control method comprises the following steps: obtaining anouter coil tube temperature of an air conditioner every preset time interval, and determining a first-order derivative and a second-order derivative of the outer coil tube temperature; and controllingthe air conditioner to defrost while the first-order derivative and the second-order derivative meet set conditions. By determining the first-order derivative and the second-order derivative of the outer coil tube temperature, defrosting can be determined to perform on the air conditioner according to the first-order derivative and the second-order derivative, and a defrosting condition can be intuitively determined; when frosting degree of the air conditioner is relatively light, defrosting is not performed, so that precise defrosting is performed while frost is relatively thick; and meanwhile, frequent defrosting caused by incomplete defrosting can be avoided.

The invention discloses a ternary-cycle air cooled refrigerator. An electrical control device internally stores parameters such as a refrigerating fan operating target time parameter LCFSJ. The defrosting method comprises a freezing chamber defrosting method, a refrigerating chamber defrosting method and a variable temperature chamber defrosting method. The freezing chamber defrosting method comprises a defrosting entering preparing step, a defrosting preparing step, a defrosting entering step, a defrosting step and a defrosting existing step. According to the ternary-cycle air-cooled refrigerator and the defrosting method thereof, considering specific working conditions in the operation process of the refrigerator, accurate matching of the defrosting control and the actual working conditions is realized, the defrosting effect is ensured, the condition that defrosting is carried out when defrosting is not needed is avoided, frequent defrosting is avoided, excessive starting of a defrosting electrical heater is avoided, so that energy is saved, and a phenomenon that defrosting cannot exit is prevented.

The invention relates to the technical field of defrosting, in particular to a defrosting control method and device of an air conditioner and the air conditioner. According to the scheme, when the airconditioner works, different environmental temperature intervals are divided according to outer loop temperature and air humidity, so as to cover all the temperature ranges of unit operation; whetherdefrosting conditions are met or not is judged according to the outer loop temperature and air humidity; and a defrosting actions corresponding to each environmental temperature interval is executedaccording to the environmental temperature interval. Accurate defrosting is achieved, frequent defrosting is prevented, an outdoor heat exchanger is divided into a first heat exchanger unit and a second heat exchanger unit during defrosting, and the two units perform defrosting alternately, so that the air conditioner can operate efficiently without frost while requirements on defrosting and customer comfort are met.

The invention relates to an air-conditioner and a defrosting method and a defrosting device thereof. The defrosting method comprises the steps that after starting of a compressor is completed, running time T1 of the compressor is recorded; when the time T1 is equal to preset time T, a suction pressure value or an evaporation pressure value is detected; when the suction pressure value or the evaporation pressure value is smaller than a preset pressure value, a running pressure specific value of the air-conditioner and continuous time T2 of the air-conditioner are detected; when the pressure specific value and / or the continuous time T2 and a preset pressure specific value meet the defrosting condition, the air-conditioner is controlled to carry out defrosting, thus, frequent defrosting can be avoided, the period of carrying out defrosting in a severe frosting environment can be shortened, intelligent defrosting can be achieved effectively, the good defrosting effect is achieved, a unit can be protected, and reliable running of the unit can be achieved.

The invention provides a method for preventing frost from being formed on an evaporator and an air conditioner. The method for preventing frost from being formed on the evaporator comprises the stepsthat condenser outer plate temperature is obtained in a low-temperature refrigeration mode; if the condenser outer plate temperature is lower than a condenser outer plate temperature threshold value,the continuous working time of condenser refrigeration is obtained; if the continuous working time of condenser refrigeration is greater than a condenser refrigeration working time threshold value, adefrosting mode is enabled, wherein the continuous working time is the continuous refrigeration working time of the condenser after the condenser outer plate temperature is lower than the condenser outer plate temperature threshold value. According to the method for preventing frost from being formed on the evaporator and the air conditioner, the frosting situation of the evaporator can be accurately judged during low-temperature refrigeration by detecting the condenser outer plate temperature and the operating situation of a compressor, thus frost is effectively prevented from being formed onthe evaporator, and the abnormal situation is avoided.

The invention relates to the field of defrosting control, in particular to an adjustable defrosting control method and system, equipment and a readable storage medium. The defrosting time at present is recorded, and when the time exceeds a preset defrosting time M, it is regarded that the frosting amount is large; when the defrosting period at the next time is reduced by X hours, the next defrosting can be promoted to come as quickly as possible, and the phenomenon that frost on a refrigerator evaporator cannot be removed completely for several times and real ice is formed to influence refrigeration of a refrigerator is prevented; when the time is shorter than a preset defrosting time N, it is regarded that the frosting amount is small, and when the next defrosting period is increased by Yhours, the next defrosting can be delayed; and meanwhile frequent defrosting of the refrigerator can be prevented, and power consumption of the refrigerator is reduced. By adoption of the method, therefrigerator defrosting period difference of different regions can be effectively eliminated completely, the effect that the refrigerator evaporator cannot form the real ice by means of frosting is guaranteed, and normal refrigeration of the refrigerator is ensured. Meanwhile, the effect that the refrigerator cannot be defrosted frequently is guaranteed, and the power consumption of the refrigerator is reduced.

The invention belongs to the technical field of air conditioners, and particularly relates to a defrosting control method of an air conditioner. In order to prevent the room temperature fluctuation from being too big during defrosting, the defrosting control method comprises the following steps of starting from the fact that the air conditioner enters in the defrosting mode after starting up, calculating the accumulative consumed power W accumulation of the air conditioner in real time; and comparing the accumulative consumed power W accumulation with preset consumed power W, and judging whether the air conditioner enters in the defrosting mode again or not according to the comparative result. According to the defrosting control method of the air conditioner provided by the invention, thepreset consumed power W is adopted as a baseline, so that the time for the air conditioner to enter in the defrosting mode can be accurately judged, and the phenomenon of frequent defrosting is avoided. In addition, according to the accumulative consumed power of the air conditioner, the influence of the defrosting process on the indoor temperature can be reduced to the great extent, and the indoor temperature cannot be fluctuated greatly.

The invention provides a frosting and defrosting system and method for an external heat exchanger of an electric automobile. The frosting and defrosting system comprises a compressor, an internal condenser, an evaporator, the external heat exchanger, a throttling device, the evaporator and a refrigerant temperature sensor; when the frosting and defrosting system is in a heating mode, an exhaust refrigerant of the compressor enters the internal condenser for condensation and heat release, after being throttled by the throttling device, the refrigerant enters the external heat exchanger for evaporation and heat absorption, the refrigerant at the outlet of the external heat exchanger returns to the compressor, and the refrigerant temperature sensor is arranged at the outlet end of the external heat exchanger; and when the frosting and defrosting system is in a defrosting mode, an exhaust refrigerant of the compressor enters the external heat exchanger for condensation and heat release, the refrigerant temperature sensor detects the inlet temperature of the external heat exchanger, and outlet refrigerant of the external heat exchanger enters the evaporator after being throttled by thethrottling device and then returns to the compressor. According to the frosting and defrosting system and method for the external heat exchanger of the electric automobile, the judgment method is simple, accurate and low in cost; parameters can be adjusted in a self-adaptive mode along with use of a vehicle; and the situations that a refrigerant leaks, and a heat exchanger outside the vehicle getsdirty and blocked are considered.

The invention belongs to the technical field of air conditioners, and particularly relates to an air conditioner defrosting control method. In order to prevent excessive room temperature fluctuation during defrosting, the defrosting control method comprises the following steps that the accumulated heating capacity Q accumulation of the air conditioner is calculated in real time, and the calculation starts from the time when the air conditioner enters the defrosting mode for the first time after the air conditioner is started; and the accumulated heating capacity Q accumulation is compared withthe preset heating capacity Q, and whether the air conditioner enters the defrosting mode again or not is judged according to the comparison result, wherein the time for entering the defrosting modeof the air conditioner for the first time after the air conditioner is started is determined according to the following modes that the time T for entering the defrosting mode of another air conditioner consistent with the air conditioner in model for the first time after each starting in the same environment and under the same operating condition is acquired, and the time for entering the defrosting mode of the current air conditioner for the first time after the current air conditioner is started is determined according to the time T. According to the air conditioner defrosting control method, the time for entering the defrosting mode of the air conditioner for the first time after the air conditioner is started can be judged more accurately, and the influence on the indoor temperature inthe defrosting process can be reduced to the maximum extent.

The invention discloses a defrosting method applicable to an outdoor air absorbing port of an air blower in a cold area. The method comprises the following steps: detecting actual temperature T of theair absorbing port; detecting the air absorbing resistance and the air inlet volume of an air channel of the air blower in case that the actual temperature T1 is not beyond preset temperature T; if the detected air absorbing resistance value continuously increases, starting to time when the detected air inlet value continuously decreases; continuously detecting the air absorbing resistance and the air inlet volume of the air channel of the air blower, wherein the continuous detecting lasting time is t; if the detected air absorbing resistance value, the detected air inlet volume resistance orthe variation of the air absorbing resistance and the air inlet volume meets the defrosting requirement, controlling a defrosting mechanism to perform the defrosting action again. With the adoption of the method and the device, defrosting can be effectively intelligently carried out, and good defrosting effect is achieved; and the air blower, boiler equipment and a generation set can reliably run.

The invention discloses a control method and device used for an air conditioner and capable of modifying defrosting conditions. The control method includes the steps that the content of particulate matters in a target environment is detected, and the target environment is the environment where a heat exchanger of an air conditioning unit is located; and when the content of the particulate mattersin the target environment is higher than the preset content, the defrosting control conditions of the air conditioning unit are modified, and the defrosting control conditions of the air conditioningunit are temperature conditions to control the air conditioning unit to execute defrosting. Through the control method and the control device, the problem that in correlation techniques, particulate matters in the air are attached to a heat exchanger and affect the heat exchange effect, as a result, the unit misjudges defrosting conditions and carries out defrosting frequently is solved.

The invention relates to an ionic solution three-cycle coupling low-temperature heat supply system and a using method. The ionic solution three-cycle coupling low-temperature heat supply system comprises a low-temperature heat collection subsystem, a heat pump energy supply subsystem and an enthalpy increasing regeneration subsystem. The low-temperature heat collection subsystem is provided with an ionic solution heat collection circulation loop, and the heat pump energy supply subsystem is provided with an ionic solution energy supply circulation loop. And the enthalpy increasing regeneration subsystem is provided with an ionic solution regeneration circulation loop. The low-temperature heat collection subsystem and the enthalpy increasing regeneration subsystem are communicated with each other through the ionic solution regeneration circulation loop, and the enthalpy increasing regeneration subsystem supplies and conveys a regenerated ionic solution to the low-temperature heat collection subsystem through the ionic solution regeneration circulation loop. The low-temperature heat collection subsystem and the heat pump energy supply subsystem are communicated with each other through the ionic solution energy supply circulation loop, and the low-temperature heat collection subsystem transfers heat to the heat pump energy supply subsystem through the ionic solution energy supply circulation loop. According to the ionic solution three-cycle coupling low-temperature heat supply system and the using method, a small amount of electric energy is input through a heat pump unit, and thus low-temperature heat energy below the freezing point can be transferred to the high-temperature position. And the requirements of building heating and heat supply are met.

The invention belongs to the field of air-conditioners and discloses a defrosting control method and system of an air processing unit, a storage medium and a processor. The method includes the steps that after the unit runs, the temperature and the pressure value of an outdoor coil pipe are obtained; when the temperature of the outdoor coil pipe is lower than a first preset temperature and the cumulative time exceeds first preset duration, the outdoor environment temperature is obtained; whether the outdoor environment temperature is higher than or equal to a second preset temperature or not is judged; if yes, the outdoor environment temperature is corrected through a first preset coefficient, and otherwise, the outdoor environment temperature is corrected through a second preset coefficient; the temperature differential value between the corrected outdoor environment temperature and the temperature of the outdoor coil pipe is calculated; and when the temperature differential value islarger than the pressure value, operation enters a defrosting process. The set judgment condition for entering the defrosting process is more suitable for the actual running situation of the unit, thesituation that operation enters the defrosting process too early or too late is avoided, and thus the unit heating efficiency is improved.

The invention belongs to the technical field of air conditioners and particularly relates to a defrosting control method of an air conditioner. For preventing overlarge temperature fluctuation of a room in a defrosting process, the defrosting control method provided by the invention comprises the following steps of: calculating the accumulated consumed power W<accumulation> of the air conditionerin real time from the moment when the air conditioner enters a defrosting mode for the first time after the air conditioner is started; comparing the accumulated consumed power W<accumulation> with preset consumed power W, and judging whether the air conditioner should enter the defrosting mode again according to the comparison result, wherein the time when the air conditioner enters the defrosting mode for the first time after the air conditioner is started is determined according to the following ways of: acquiring the time T when the same type of air conditioner enters the defrosting mode for the first time after the air conditioner is started every time under the same environment and the same running work condition; and acquiring the time when the current air conditioner enters the defrosting mode for the first time after the current air conditioner is started according to the time T. The defrosting control method provided by the invention can be used for judging the moment when the air conditioner enters the defrosting mode more accurately and farthest reduces the influences on the indoor temperature in the defrosting process.

The invention provides a refrigerator and a defrosting control method thereof. The refrigerator comprises an evaporator, a first heater and a second heater, a first air return opening and a second air return opening are arranged beside the evaporator, the first air return opening is arranged close to the bottom of the evaporator, and the second air return opening is arranged above the first air return opening in a spaced manner. The first heater is arranged at the bottom of the evaporator, the second heater is arranged above the first heater, and the position of the second heater corresponds to the position of the second air return opening. The defrosting control method comprises the steps that the starting rate N of a second chamber in a set period is obtained, and then the defrosting mode is determined according to the starting rate N. According to the refrigerator and the defrosting control method, frequent defrosting can be avoided, the defrosting efficiency can be improved, the defrosting heating time can be shortened, energy consumption can be reduced, and the temperature in refrigerator chambers can be kept stable easily.

The invention discloses a defrosting control method for an intelligent heat pump. The defrosting control method for the intelligent heat pump comprises the following steps: according to the starting operation time t1 of a heat pump and the coil pipe temperature T1 of an evaporator, carrying out first-time defrosting judgment; combining with an atmosphere situation to give different defrosting judgment ways; after a difference value between environment temperature and the coil pipe temperature of the evaporator during a rain weather is greater than or equal to a set value, entering a defrostingprocess; during non-rain weathers, according to the water level of condensate water, carrying out subsequent defrosting judgment; when the condensate water is in the presence in a condensate water pan, shortening defrosting time intervals; when the condensate water is in the absence in the condensate water pan, prolonging a defrosting time interval; taking a previous defrosting time interval as areference for the judgment of each defrosting time interval so as to guarantee that the defrosting operation is similar to the operation working condition of the heat pump so as to determine the defrosting time interval; after the defrosting process is started, when the coil pipe temperature of the evaporator achieves a certain value, exiting the defrosting process so as to save energy while comfortable hot water supply experience is provided for users.

The invention discloses a three-circulation air-cooled refrigerator. Various parameters such as a refrigerating fan running target time parameter LCFSJ are stored in an electric control device. The defrosting method includes a freezing chamber defrosting method, a cold chamber defrosting method and a variable temperature chamber defrosting method. The method for defrosting the freezer includes entering a defrosting preparation step, defrosting preparation step, entering defrosting step, defrosting step and exiting defrosting step. The three-cycle air-cooled refrigerator and its defrosting method of the present invention take into account various specific working conditions during the operation of the refrigerator, so that the defrosting control and the actual working conditions of the refrigerator can be finely matched, which not only ensures the defrosting effect, It also avoids defrosting when defrosting is not needed, avoids frequent defrosting, and avoids excessively turning on the defrosting electric heater, thereby saving energy and preventing the phenomenon that defrosting cannot be exited.