156results about How to "Avoid cooling effect" patented technology

The invention discloses a cold-hot compound die molding method for an aluminum alloy sheet metal component, and relates to a molding method for a sheet metal component. The invention aims to solve the technical problems that the conventional hot-state molding method for the aluminum alloy sheet metal component is low in molding efficiency and can easily cause local crinkles and fractures, and provides the cold-hot compound die molding method for the aluminum alloy sheet metal component. The cold-hot compound die molding method comprises the following steps of: 1, heating a lower die to a temperature of between 200 and 900 DEG C; 2, placing an aluminum alloy plate blank on the lower die and heating the aluminum alloy plate blank to the deformation temperature of the aluminum alloy plate blank; 3, closing the die to press the aluminum alloy plate blank into the aluminum alloy sheet metal component; 4, separating the aluminum alloy sheet metal component, an upper die and a blank holder from the lower die; and 5, cooling the upper die and the blank holder, keeping the temperature for a certain period of time, and taking the aluminum alloy sheet metal component down to finish the cold-hot compound die molding of the aluminum alloy sheet metal component. According to the method, a cold-hot compound die in which the upper die is in a cold state and the lower die is in a hot state is adopted to mold the aluminum alloy sheet metal component. The cold-hot compound die molding method is suitable for making the aluminum alloy sheet metal component.

The invention relates to a refrigerator and a control method for a temperature-changing chamber of a refrigerator. The refrigerator comprises the temperature-changing chamber and a control panel for controlling the temperature of the temperature-changing chamber, wherein a cabinet liner of an evaporator is separated into an upper temperature-changing chamber and a lower refrigerating chamber by a heat-insulating separating plate; an air flue is arranged on the rear part of the temperature-changing chamber and the refrigerating chamber; the evaporator is located on the rear part of the air flue; an air door of the temperature-changing chamber and a fan are arranged in the air flue; a first heater is arranged on the heat-insulating separating plate in the temperature-changing chamber; a second heater is arranged on a position corresponding to the rear part of the temperature-changing chamber in the air flue; a temperature sensor is arranged on an inner side wall of the temperature-changing chamber; and the temperature is controlled by the temperature-changing chamber in refrigerating and heating two modes. The suitable heater and mounting position are selected by the refrigerator and an effective control method is used for realizing the adjustment for the temperature-changing chamber in a wide temperature scope under a wide weather condition, under the condition of saving power consumption, so that diverse and individual selections are supplied to users and the food storage requirement is met.

The invention provides an electric automobile air conditioning system in order to overcome the defects that according to an existing automobile air conditioning system adopting a four-way reversing valve, reversing is delayed and is not in place. The electric automobile air conditioning system comprises a refrigerant circulation system and a cooling liquid circulation system. Refrigerants in the refrigerant circulation system flow in the same direction under the working conditions of high-temperature refrigeration, low-temperature refrigeration and normal-temperature refrigeration and heating. Air inside an automobile is heated depending on the cooling liquid circulation system, the refrigerant circulation system is only used for refrigeration, and the refrigerants inside the refrigerant circulation system keep flowing in the same direction under all the working conditions; in this way, the defects that according to the existing air conditioning system, reversing is delayed and is not in place are overcome, it is avoided that due to reversing of the refrigerants, refrigeration or heating is delayed, the comfort of an air conditioner is improved, and the problems that an outdoor heat exchanger is prone to frosting and difficult to defrost are solved.

In order to solve the problem of weak comfort due to refrigeration or heating delay or even if incapability of refrigerating or heating caused by reversing delay or no in-place of reversing of refrigerant in a heat pump air conditioning system in the prior art, the invention provides a heat pump air conditioning system of a pure electric vehicle and the pure electric vehicle. The heat pump air conditioning system of the pure electric vehicle comprises an electric compressor, a gas-liquid separator, an internal first heat exchanger, an external first heat exchanger, an intersystem heat exchanger, a first expansion valve, an external second heat exchanger, a second expansion valve, an electric water pump, an internal second heat exchanger, multiple pipes connected among equipment, and valves arranged on the pipes. The heat pump air conditioning system of the pure electric vehicle realizes the functions of refrigerant refrigeration and secondary heating of coolant of the vehicle air conditioning system, and effectively prevents the refrigeration or heating delay, or even the condition of incapability of refrigerating or heating; and meanwhile, the heat pump air conditioning system of the pure electric vehicle is higher in heating energy efficiency, high in comfort, simple and liable to perform.

The invention relates to a copper-nickel sulfide ore concentrate smelting method through the pyrometallurgy and particularly relates to improvement of the process for smelting the copper-nickel sulfide ore concentrate through the pyrometallurgy. According to the invention, during the process of transferring smelting slag to a sedimentation electric furnace from a smelting furnace, the reduction slagging reaction of magnetic iron oxide is completed in a chute, so that oxides of nickel, copper and cobalt in the slag are vulcanized and converted into sulphonium. The method provided by the invention has the advantages as follows: the depletion of smelting slag and adjustment of slag types can be completed in the reaction chute, so that the operation of the sedimentation electric furnace is facilitated, and the waste slag discharged from the electric furnace contains less valuable metal, and the metal recovery rate is increased; the smelting slag flows through the reaction chute to adjust the types of slag, so that the smelting slag, which does not contain high magnetic iron oxides or copper-nickel oxides, can be subjected to the smelting process so as to product high-grade sulphonium; the separation of iron and copper nickel is completed during the process of smelting, the blowing of white matte is non-slag smelting, so that the low-air pollution is not caused, and the difficulties of treatment of blowing slag are avoided.

The invention discloses a controlling method and device of electronic expansion valves for air conditioner, a computer product and an air conditioner, and relates to the technical field of computers.The problem that flow distribution of refrigerants of indoor units are unbalanced once the indoor units are started up is solved. The controlling method of the electronic expansion valves of the air conditioner comprises the following steps: acquiring refrigerant saturated temperature detection values corresponding to the various indoor units, being started up and operated, in the air conditionerin real time; judging whether an entire entrance condition of a refrigerant flow adjustment process is met when the air conditioner is carried out; using the electronic expansion valves correspondingto the indoor units which meet the entrance condition as to-be-adjusted electronic expansion valves if the entire entrance condition of the refrigerant flow adjustment process is met when the air conditioner is carried out, controlling the entrance of the indoor units into the refrigerant flow adjustment process, and adjusting the openness of the to-be-adjusted electronic expansion valves to ensure that refrigerant flow of the to-be-adjusted electronic expansion valves meets a requirement on cooling ability or heating ability of the indoor units; and continuously carrying out air conditioner and judging whether the entire entrance condition of the refrigerant flow adjustment process is met if the entire entrance condition of the refrigerant flow adjustment process is not met when the air conditioner is carried out. According to the method disclosed by the invention, the refrigerant flow of the various indoor units can meet the requirements on the cooling ability or the heating ability.

The invention relates to the field of household appliances, and provides a method and system of air conditioner noise control to solve the problem that an existing control method of an air conditionerunit cannot flexibly switch realization between air conditioner noise control and the air conditioner function. The control method includes the following steps that a corresponding relationship between a using condition and a noise threshold valve of an air conditioner is set, and after the air conditioner is started, the corresponding noise threshold value is set according to the current using condition of the air conditioner; a noise valve of an air outlet of the air conditioner is detected in real time, and if the noise value is not equal to the noise threshold valve, operating parametersof the air conditioner unit are adjusted according to the ratio of the noise value to the noise threshold valve. The different noise thresholds are set according to the different using conditions of the air conditioner, in the prior art, the influence on the cooling or heating function of the air conditioner by always adopting a fixed preset noise value to control noise is avoided, flexible switching between air conditioner noise control and the air conditioner function is realized, the comfort level of users is improved, and the method and system of air conditioner noise control are suitablefor household air conditioners.

A low-temp throttle refrigerator with switchable gas tank and mixed working medium is composed of refrigerating compressor, switchable gas tank with high-and low-pressure electromagnetic valves, oil-gas separator, and fine oil-gas separator containing fibrous filtering core. Its advantages are high reliability and safety, high oil separating efficiency, and long service life.

The invention provides a multifunctional ice bag heat preservation box. An inner bulge part presses a third elastic communication pipe at an outer bulge part, so that gas in a second elastic air bag cannot flow back gas and can be kept in the second elastic air bag, an annular elastic air bag gradually extends into an annular clamping groove and corresponds to a lower groove portion, a first communication end and a second communication end are correspondingly connected together, the gas in a gas containing cavity enters the annular elastic air bag along a second air circulation layer through asealing air guide pipe, the annular elastic air bag is expanded and tightly attached and buckled to the annular clamping groove, and an outer thread section is matched with an inner thread section toconnect a piston knob and a box cover together for fixation. The heat preservation box is carried upside down, the second elastic air bag can be used for carrying out effective elastic supporting andbuffering on the object according to the elastic supporting force accumulated by the gravity of the object, and a third elastic air bag is used for actively and periodically sucking in hot air and sucking out cold air to continuously, effectively and comprehensively preserve freshness of the object.

The invention provides a central air conditioner starting control method. The central air conditioner starting control method comprises determining the suction-exhaust pressure difference and the normal suction-exhaust pressure difference in dependence on a compressor and a refrigerant; measuring the actual suction pressure and the actual exhaust pressure of the compressor, and calculating the difference between the actual suction pressure and the actual exhaust pressure; and comparing the difference with the suction-exhaust pressure difference. With respect to the central air conditioner starting control method, the adjusting time, the suction pressure descent rate and the freezing water inlet temperature are controlled, circulation pressure difference can be established quickly at the starting phase of the compressor, and the problem that the pressure difference is not satisfied for a long time, and therefore the working condition of the compressor is abnormal, and the whole compressor is poor in refrigeration or heating effect.

The invention relates to a secondary fast forming machine for a sole material. The secondary fast forming machine for the sole material comprises a mold for containing the sole material, a heating mold station for heating the mold, and a first cooling mold station for cooling the mold and further comprises a second cooling mold station for cooling the mold; the first cooling mold station and the second cooling mold station are arranged on the two sides of the heating mold station; the mold comprises a first mold body corresponding to the first cooling mold station and a second mold body corresponding to the second cooling mold station; an automatic transferring mechanism is further included; the first mold body can be arranged on the automatic transferring mechanism in the manner that the first mold body moves between the first cooling mold station and the heating mold station; and the second mold body can be arranged on the automatic transferring mechanism in the manner that the second mold body moves between the second cooling mold station and the heating mold station. The forming machine can greatly improve the work environment of an operator, relieve the workloads of the operator and achieve automatic forming of soles; and meanwhile the energy utilizing rate is increased, and efficient, energy-saving, environment-friendly and reasonable energy transmission is achieved.

The invention discloses infrared-near-infrared wavelength conversion detector which can integrate InAs multi-quantum point infrared detector and light-emitting diode into one chip. The former is made up of InAs / InyGa1-yAs / GaAs which alternately grows for ten cycles. The latter is made up of GaAs barrier layer and InzGa1-zAs active potential well layer. It can transform long wave thermal infrared to near infrared light without grating. This can simplify detecting system structure. The used material has mature preparation technology and good uniformity.

The invention discloses an auxiliary grinding and modifying agent and a preparation method thereof, i.e. the traditional auxiliary grinding agent and the traditional modifying agent are mixed according to a certain proportion to form a novel mixture which has the functions of the auxiliary grinding and modifying and comprises the components of saponification agent, water, diesel and linseed oil. The auxiliary grinding and modifying agent has the characteristics of simple preparation, low costs of the raw materials, and good use effect.

The invention discloses a multiple on-line system, and a refrigerant flow deviation prevention control method and device thereof. The control method comprises following steps that when a multiple on-line system runs in a mixing refrigeration and heating mode, overheat degrees of refrigeration indoor units and overcooling degrees of heating indoor units in multiple indoor units are obtained; the work state of each outdoor heat exchanger is obtained; according to the work state of each outdoor heat exchanger, the overheating degrees of the refirgreation indoor units and the overcooling degrees of the heating indoor units, the opening degree of at least one of multiple outdoor throttling elements and multiple indoor throttling elements is adjusted, and the problem of insufficient refrigerating capacity or liquid returning due to refrigerant lacking or too much refrigerants in the indoor units can be effectively solved.

The invention belongs to the technical field of air conditioning equipment mixing-increasing heat exchange, in particular to a self-oscillation jet-type mixing-increasing heat exchange air outlet device, and aims to solve the problems of fixed air outlet, poor heat exchange capability, non-uniform space temperature distribution, poor personnel comfort and the like in air outlet devices of most existing large-sized central air conditioners. The self-oscillation jet-type mixing-increasing heat exchange air outlet device comprises a main cavity and an odd number of feedback channels which are distributed on the main cavity at equal intervals, wherein the main cavity comprises a main chamber; and an air inlet and an air outlet are formed in two opposite ends of the main chamber respectively, and are in communication with each other through the main chamber. Through adoption of the mixing-increasing heat exchange air outlet device disclosed by the invention, the indoor temperature distribution uniformity is improved, and the comfort of the household living environment is improved greatly. The indoor temperature distribution is more uniform; frequent switching-on / off actions and refrigerating / heating processes of central air conditioning equipment are avoided; and the service life of the air conditioning equipment is prolonged while the running cost of the air conditioner is loweredand the electric energy is saved.

An embodiment of the invention provides an oil return control method and device and an outdoor unit of a variable-frequency air conditioner so as to at least solve the problem that the refrigerating or heating capacity of an air conditioner is decreased when a variable-frequency compressor operates at low-frequency and middle-frequency bands. The variable-frequency air conditioner comprises the outdoor unit, the outdoor unit comprises a variable-frequency compressor and an oil separator communicated with the variable-frequency compressor, the outdoor unit further comprises an outdoor unit electronic expansion valve, one end of the outdoor unit electronic expansion valve is communicated with the oil separator, and the other end is communicated with the variable-frequency compressor. The method comprises steps as follows: the first operating frequency of the variable-frequency compressor is detected; according to the first operating frequency and the pre-stored corresponding relation, a first open degree value of the outdoor unit electronic expansion valve corresponding to the first operating frequency is determined, wherein the corresponding relation is the corresponding relation between the operating frequency and open degree values of the outdoor unit electronic expansion valve; the open degree value of the outdoor unit electronic expansion valve is adjusted to the first open degree value. The invention is applicable to the technical field of air conditioners.

The invention relates to the technical field of refrigerators, in particular to a temperature control method of a single-cycle refrigerator and a single-cycle refrigerator. The temperature control method of the single-cycle refrigerator comprises the following steps: when a refrigerating chamber needs refrigeration, starting up a compressor; and when a freezing chamber needs refrigeration, independently heating up the refrigerating chamber till the refrigerating chamber needs refrigeration. The single-cycle refrigerator is suitable for the temperature control method of the single-cycle refrigerator. The temperature control method for the single-cycle refrigerator and the single-cycle refrigerator can not only achieve multiple temperature control functions but also lower the cost and reduce complaints caused by functional faults.

The invention provides a method for separating and purifying polyhydroxyalkanoate from the interiors of microbial cells. The method includes the following steps: after a microbial strain producing polyhydroxyalkanoate is fermented, the bacterial cells in fermentation broth are collected; in an ultrasonic generator, the bacterial cells are mixed with organic solvent, the dosage of the organic solvent is 10 to 30 times as much as the bacterial cells, and after 20 to 70 minutes of ultrasonic vibration under 40 DEG C to 80 DEG C, solid-liquid mixture is obtained; the solid-liquid mixture is separated centrifugally or by filtration, so that a liquid phase containing polyhydroxyalkanoate is obtained; the liquid phase containing polyhydroxyalkanoate is cooled to 0 DEG C to 10 DEG C, the temperature is kept for 10 to 30 minutes, so that turbid liquid which is formed after polyhydroxyalkanoate crystals are separated out is obtained; the turbid liquid is separated centrifugally or by filtration, so that solid polyhydroxyalkanoate is obtained; and after the solid polyhydroxyalkanoate is dried, finished polyhydroxyalkanoate product is obtained. The method has the advantages of simple process, low energy consumption, low production cost and high product extraction rate, and is easy to operate.

The present invention relates to oxygen-rich comburant method for float glass kiln. The oxygen-rich air the nitrogen making system in the float glass production line produces is pressurized, introduced to two sides of the glass smelting kiln heat accumulating chamber, made to pass through lower branched pipes with control valve, jetted with the oxygen-rich nozzle and mixed with comburant blast to realize local oxygen increasing combustion. The oxygen-rich nozzle is heat resisting rectangular one of stainless steel, is in an angle of 25-50 deg to the central line of the small furnace, and is provided with guide board. The said method can raise the heat efficiency of in-kiln combustion while avoiding local overheat, so as to lower oil consumption, raise output and reduce NOx exhaust.

The invention discloses a high-efficiency grinding aid and a preparation method thereof. The high-efficiency grinding aid is a new mixture formed by mixing traditional grinding aid and modifier according to a certain ratio, and the mixture has the functions of grinding aiding and modification. The high-efficiency grinding aid comprises the following components in parts by weight: 35-45 parts of triethanolamine, 5-10 parts of sodium acetate, 40-55 parts of water, 1.0-3.0 parts of flax seed oil, 1.5-3.5 parts of glycerol and 2-3 parts of silicon oxide. The grinding aid disclosed by the invention has the characteristics of simple manufacturing process, low material cost and good use effect.

The invention belongs to the technical field of machine room heat radiation and aims to solve the problems that a machine cabinet inside a machine room is poor in cooling effect, non-uniform in temperature reduction, and the like. To solve the problems, the invention provides a heat management device and method used for the machine room. At least one machine cabinet is arranged inside the machineroom; at least one air inlet corresponding to the machine cabinet is formed in the bottom of the machine room; the heat management device comprises at least one heat management unit which correspondsto and is assembled with the machine cabinet; air can be introduced into the machine cabinet from the air inlet through the heat management unit, and then the machine cabinet can be cooled. The heat management method comprises the following steps: acquiring the temperature of the machine cabinet; controlling the power of a draft device according to the temperature of the machine cabinet, thereby selectively cooling the machine cabinet. By adopting the heat management device, the machine cabinet can be specifically and precisely cooled; in addition, intelligent regulation and control can be implemented according to load states of different machine cabinets, the energy utilization efficiency can be improved, and the whole machine room can be at an appropriate ambient temperature.

The invention relates to the technical field of air conditioners, and particularly provides an air conditioner control method, a storage medium and a control device. The invention aims to solve the problem that the heat exchange efficiency of a heat exchanger of an outdoor unit is relatively poor due to the problem that the outdoor unit is not cleaned in time or refrigerant leakage is not found in time in the prior art. In order to achieve the purpose, an outdoor unit comprises a heat exchanger, a throttling valve and a pressure detection device arranged at the position, located in front of the throttling valve, of a refrigerant pipeline. The control method comprises the steps of when an air conditioner is in a preset working condition, acquiring the pressure of the position, in front of the throttling valve, of the refrigerant pipeline; comparing the pressure with the first preset pressure and the second preset pressure; and on the basis of the comparison result, selectively sending out prompt information of refrigerant leakage or self-cleaning. According to the air conditioner control method, the storage medium and the control device provided by the invention, the prompt information is selectively sent out according to the pressure detected by the pressure detection device, and a user takes corresponding countermeasures in time according to the prompt information, so that the problems existing in the air conditioner can be solved in time.

The invention provides a method for manufacturing a rare earth permanent magnet ring by adopting a hot pressing-thermal deformation process. The method comprises the following steps of a hot pressingtreatment step: putting a rare earth permanent magnet powder into a hot pressing mold for hot pressing treatment to obtain an isotropic permanent magnet; and a thermal deformation treatment step: carrying out thermal deformation treatment on the isotropic permanent magnet to manufacture a radial rare earth permanent magnet ring. The method has the following advantages that 1) the adopted hot pressing-thermal deformation forming process is beneficial to uniform distribution of a high-temperature flow stress on the magnet and the magnetic ring, and is beneficial to improving formability and uniformity of the radiation orientation permanent magnet ring; 2) the internal stresses in the magnet and the magnetic ring can be effectively released in real time through an intermittent mode in the hotpressing and thermal deformation processes; and 3) a thermal deformation process link is directly entered into after hot pressing so that a cooling link after hot pressing and a heating link before thermal deformation are avoided, a friction degree between the magnet and the die is reduced, and stress reduction, grain refinement, process takt improvement, cost reduction and the like are facilitated.

The invention discloses an integrated digital PCR system and a using method thereof. The system involves a high-density micro-cavity array digital PCR chip integrated with one cavity, an optical detection module, a hot water circulation temperature control module, a fluid control module and a central control module. When the system is applied to nucleic acid sample detection, firstly, the digitalPCR chip is fixed on an objective table of the optical detection module, and through pipes communicating with a sample pipe and a hot water tank are assembled at interfaces of the chip; and then, thecentral control module is started, relevant parameters of a control program are set, and the fluid control module, the hot water circulation temperature control module and the optical detection moduleare controlled through the control program to sequentially achieve sample filling, sample discretization, hot water circulation amplification, chip scanning recording, data analysis and other operations. Based on the combination of the micro-cavity array and the integrated cavity structure of the digital PCR chip, the system can enable the whole process of digital PCR detection to be completed ona single instrument, and the detection efficiency and the result reliability are improved.

The invention relates to an integrated heat management system of vehicle. The purpose of the present invention is to prevent a sharp air-conditioning load change in an air-conditioning device when theair-conditioning device turns ON or OFF a water-cooled cooling device, thereby preventing a decrease in refrigeration performance of the air-conditioning device and a sharp temperature change in exhaust air in a vehicle cabin due to the sharp air-conditioning load change. The integrated heat management system for a vehicle includes an air conditioner configured to cool or heat a passenger compartment using a refrigerant, a water-cooled cooling device configured to cool a specific device using the refrigerant of the air conditioner, and an air conditioning load change preventing unit configured to prevent a sudden change in an air conditioning load of the air conditioner when turning ON or OFF the water-cooled cooling device with respect to the air conditioner.

The invention relates to the technical field of coal mining auxiliary equipment, and discloses coal digging anti-landslide equipment capable of preventing overheating operation and achieving automaticcooling. The coal digging anti-landslide equipment comprises a frame body, wherein a coal discharging cavity is fixedly arranged in the frame body, a lifting cylinder is fixedly arranged at the top end of the coal discharging cavity, and a motor is fixedly arranged below the lifting cylinder at the top end of the coal discharging cavity; and the bottom end of the motor is in transmission connection with a screw rod, coal discharging pipes are fixedly installed at the left side and the right side of the coal discharging cavity through connecting plates, and rotating shafts are rotatably connected to the tops of the coal discharging pipes. According to the coal digging anti-landslide equipment capable of preventing overheating operation and realizing automatic cooling, a vibration part is arranged at the contact end of the coal discharging pipes and the coal discharging cavity, so that a conveying pipeline is effectively prevented from being blocked, and the working efficiency is improved; and the equipment is automatically cooled after the temperature of the equipment rises, and the speed of the working equipment is reduced, so that the service life is prevented from being influenced by equipment damage caused by further operation at high temperature.

The invention discloses a device for maintaining the overall temperature of a working cylinder balanced and a control method of the device. The device mainly comprises a heating device, a heat preservation device, a detection device and a control unit and can achieve slow and balanced change of the temperature of an area where a forming workpiece is located. The control method of the device mainly comprises the following steps: calculating the position and the height of the forming workpiece in the working cylinder via slice preview; calculating the thickness and the shape of the forming workpiece via slice preview; and simulating the heat load data model of the working cylinder. The device and the control method can keep the change rate of temperatures of all areas to be consistent, can reduce warping deformation and defects of mechanical property caused by non-uniform heat dissipation of the forming workpiece due to sudden change of temperature, and can ensure the sintering quality of the forming workpiece.

The invention discloses a tire multi-threshold intelligent explosion-proof system, an intelligent explosion-proof method and a vehicle. The tire multi-threshold intelligent explosion-proof system comprises a first signal detection module, a first signal processing module, a water tank cooling subsystem, an acoustic and optical alarm subsystem, a tail lamp alarm subsystem, an early warning subsystem, a forced deceleration subsystem and an indication circuit. The system adopts a double-threshold detection system, and superior to current most inventions that cooling is manually controlled completely by the experience of drivers, the temperature is decreased more timely; once an abnormal situation occurs, the vehicle is also forced to slow down to prevent accidents caused by a tire failure; bydetecting the tire states in real time, different measures are adopted according to the different states of tires so as to guarantee driving safety, and damage caused by tire burst is lowered; and through intelligent detection treatment of the system, the vehicle travelling safety can be guaranteed, and accidents caused by tire burst are reduced.

The invention provides a refrigerator control method and control device. The refrigerator refrigerating system at least comprises a compressor, a condenser, a drying filter, a capillary pipe and an evaporator which are connected in sequence. The control method comprises the steps of acquiring the environmental temperature of the area where a refrigerator is located; acquiring the temperature of arefrigerant on the inlet side of the drying filter; calculating the temperature difference of the temperature of the refrigerant and the environmental temperature; and adjusting the rotating speed ofthe compressor according to the environmental temperature and temperature difference. Through the refrigerator control method, the pressure of a refrigerator refrigerating cycle system can be adjustedto prevent the problems that the non-refrigerating and poor refrigerating effects are caused when the refrigerator gets close to the heat source, and normal refrigerating cycle of the refrigerator isrealized.

The invention discloses an outdoor unit of an air conditioner, the air conditioner, and a control method of the air conditioner. The outdoor unit of the air conditioner comprises a machine shell, at least one first-grade blower and at least one second-grade blower; the machine shell is provided with an air inlet and an air outlet; the first-grade blower and the second-grade blower are arranged inthe machine shell, the maximum air volume of the first-grade blower is Qmax, and the minimum air volume is Qmin; the maximum air volume of the second-grade blower is qmax, and the minimum air volume is qmin, wherein qmax is not more than Qmax, and qmin is not more than Qmin. According to the outdoor unit of the air conditioner, the air volume adjusting scale of the outdoor unit of the air conditioner can be enlarged by arranging the are arranged in the machine shell, the maximum, the cooling effect of the air conditioner under the low temperature cooling condition is guaranteed; compared withthe technical scheme of adding a low-temperature cooling cover in the prior art, the structure and the processing technique of the outdoor unit of the air conditioner are simplified, and the cost is effectively reduced; besides, the cooling and heating effects of the air conditioner under the normal temperature can be improved, and the energy efficiency of the air conditioner under the normal cooling and heating conditions can be improved.