93results about How to "Improve defrosting effect" patented technology

The invention discloses a preparation method and application of a polydimethylsiloxane super-hydrophobic anti-icing and deicing material, and belongs to the technical field of polydimethylsiloxane coatings and anti-icing and deicing coating paints in the fields of ships, airplanes, high-speed rails, ocean engineering and the like, and the preparation method comprises the following steps: preparing PDMS / CNTs porous foam by using polydimethylsiloxane and carbon nanotubes; and carrying out spraying modification on the PDMS / CNTs porous foam by using the CNTs / SiO2 super-hydrophobic composite coating solution, and curing to obtain the polydimethylsiloxane super-hydrophobic anti-icing and deicing material. The prepared polydimethylsiloxane super-hydrophobic anti-icing and deicing material can be used for photo-thermal deicing and defrosting, and has excellent photo-thermal stability, excellent super-hydrophobicity, good corrosion resistance and good wear resistance. The polydimethylsiloxane super-hydrophobic anti-icing and deicing material prepared by the preparation method disclosed by the invention has a good ice melting effect and defrosting capability.

The invention discloses a ventilator shell anti-icing device and an installation method, and relates to the technical field of air blowers. An anti-icing device for a ventilator shell comprises a heating module, a supporting module and an emptying module. The heating module comprises a coil pipe, and heating fluid is arranged in the coil pipe; the coil pipe is pressed and connected to the bottom position of the outer side wall of the fan shell through the supporting module; the emptying module comprises an emptying pipe, one end of the emptying pipe is connected with the fan shell, and a valve body is installed at the other end of the emptying pipe. The emptying pipe is communicated with the bottom of the inner cavity of the fan shell. The supporting module enables the heating module to be installed at the bottom of the outer side wall of the fan shell, the heating module heats water in the fan shell and an inner cavity of the fan shell, liquid water is prevented from being frozen into ice or solid ice is prevented from being melted into liquid water, and then the liquid water is discharged out of the fan through the emptying module, so that the anti-freezing effect is achieved, and the service life of the fan is prolonged. And the operation safety is improved.

The invention discloses a frozen coal unfreezing device for truck transportation, which belongs to the technical field of coal transportation and comprises a turnover assembly, a first heating assembly, a second heating assembly, a driving assembly and a water inlet assembly. According to the invention, a plurality of working infrared heating tubes heat frozen coal in the compartment and two sides of the compartment, hot water is sprayed to one side of the interior of the compartment, the unfrozen hot water is heated by the heated compartment, and the frozen coal is unfrozen continuously by the hot water heated by the compartment; the working infrared heating pipes can heat the side face and the bottom of the carriage, and meanwhile the working infrared heating pipes heat water at the bottom of the carriage, so that the hot water at the bottom of the carriage can unfreeze frozen coal making contact with the bottom of the carriage. The first heating assembly and the second heating assembly synchronously rotating with the carriage can enhance the unfreezing effect of frozen coal in the carriage, unfreezing and unloading can be carried out at the same time, the unloading time is shortened, and the transportation cost of the frozen coal is reduced.

The utility model belongs to the technical field of rapid thawing of meat, and particularly relates to a rapid thawing device for meat, which comprises a base, a shell cover is fixedly connected to the base, a supporting frame is fixedly connected to the shell cover, fixing columns are welded to the two sides of the top of the supporting frame, material storage bottles are fixedly connected to the two fixing columns, one-way valves are assembled on discharging pipes of the material storage bottles, springs are fixedly connected to the top ends of sleeves, and movable blocks are fixedly connected to the other ends of the springs. A movable block is fixedly connected to the support frame, a movable rod is fixedly connected to the movable block, the bottom end of the movable rod penetrates through a sleeve to be fixedly connected with a hammer head, a sleeve is fixedly connected to the top of the support frame, an air pipe is connected between the sleeve and the sleeve, a piston is arranged in the sleeve, a support seat is fixedly connected to the support frame, and a first motor is mounted on the support seat. When frozen meat is thawed, the frozen meat can be quickly thawed, meanwhile, the surface of a meat product can be prevented from being damaged, and the normal sales of the product is ensured.

The invention relates to a defrosting method and device of an air conditioner, the air conditioner and a storage medium, and belongs to the technical field of air conditioner control. The method comprises the steps that it is recognized that the air conditioner needs to be defrosted, a compressor is controlled to enter a frequency-increasing heat storage process, and the frequency-increasing heat storage process comprises the steps that the compressor is controlled to be increased from the current operation frequency to the upper frequency limit, and the heat storage duration time threshold value is operated at the upper frequency limit; and when the accumulated heat storage operation duration of the air conditioner reaches the heat storage duration threshold value, the compressor is controlled to enter the defrosting process. Therefore, according to the scheme, the compressor is controlled to enter the frequency-increasing heat storage process before defrosting, and the situation that the air conditioner absorbs a large amount of heat from the indoor space during defrosting is avoided. And when the accumulated heat storage operation duration of the air conditioner reaches the heat storage duration threshold value, the compressor is controlled to enter the defrosting process, the defrosting reliability can be guaranteed, the defrosting capacity of the air conditioner is improved, and the thermal comfort in the defrosting period is further improved.

The utility model discloses a precooling defrosting device of a medium-temperature type freeze dryer for COFs material production, which comprises a dryer body, a driving component is arranged on the top surface of the dryer body, a rotating shaft is rotatably mounted in the dryer body, a mounting frame is fixedly mounted at the bottom end of the rotating shaft, and the mounting frame is fixedly mounted on the top surface of the dryer body. A scraping assembly is arranged at one end of the mounting frame, through the arrangement of the driving assembly, a second gear rotates, then a rotating shaft is driven to rotate, the mounting frame rotates, then a mounting plate is driven to rotate, a scraping plate can rotate back and forth in a reciprocating mode, and frost condensed on the inner wall of the drying machine body is scraped; hot air generated by the hot-air blower is input into the air injection header pipe through the connecting hose and then sprayed out through the nozzles, and the air injection header pipe can rotate back and forth along with the mounting frame, so that the nozzles rotate back and forth with the rotating shaft as the center to spray the hot air to the inner wall of the dryer body to melt a frost layer which is difficult to scrape by the scraper blade. And the defrosting effect on the interior of the drying machine body is better.

The utility model relates to the technical field of household appliances, and discloses an evaporator which comprises an evaporator body and a protective plate, and the evaporator body is provided with a refrigerant pipe; the protective plate is arranged on the side part of the evaporator main body; the protection plate is provided with a first opening part and a second opening part, at least part of the refrigerant pipe penetrates through the first opening part, the second opening part is configured to enable airflow to flow to the surface, away from the evaporator body, of the protection plate through the second opening part, and the airflow circulates between the first opening part and the second opening part. And defrosting on the surface, deviating from the evaporator main body, of the protective plate is facilitated. The utility model further discloses the refrigeration equipment.

The utility model discloses fluidized quick-freezing equipment for mutton processing, which belongs to the technical field of quick-freezing equipment and comprises a mounting box and a conveying belt, a plurality of fans are fixedly mounted at the lower end in the mounting box, a plurality of evaporating pipes are symmetrically and fixedly mounted on the lower portion in the mounting box, and the evaporating pipes are arranged side by side; the outer walls of the multiple evaporation pipes are slidably connected with sliding pipes in a sleeving mode, and connecting rods are fixedly installed between the sliding pipes slidably connected with the side walls of the multiple evaporation pipes in a sleeving mode. And screws are transversely, symmetrically and rotationally mounted on the inner wall of the mounting box, the two screws are located on the two sides of the multiple evaporation pipes, the outer walls of the driving screws are sleeved with sleeves in a threaded mode, and fixing rods are fixedly mounted between the sleeves and the side walls of the adjacent sliding pipes. Compared with the prior art, the defrosting device can effectively defrost the evaporator in the fluidized quick-freezing equipment for mutton processing.

The utility model relates to the technical field of heat pumps, and discloses a non-azeotropic mixed working medium heat pump system which comprises a compressor and a refrigerant circulation loop which is connected with the compressor and forms a loop with the compressor, and a condenser, a first throttling device, a liquid storage device and an evaporator are sequentially arranged on the refrigerant circulation loop in the refrigerant flow direction. The liquid storage device is provided with a refrigerant inlet, a first refrigerant outlet and a second refrigerant outlet, the refrigerant inlet is connected with the first throttling device, the first refrigerant outlet is connected with an inlet of the evaporator, the second refrigerant outlet is connected with the inlet of the evaporator through a bypass pipeline, and an electric control valve is arranged on the bypass pipeline. According to the heat pump system, low-boiling-point components in gaseous working media account for a large amount, namely, refrigerant components actually participating in the whole defrosting circulation account for a large amount, so that high pressure in the defrosting circulation is improved, mass flow is increased, finally, acting of a compressor is larger, namely, condensation heat dissipating capacity of defrosting of an evaporator is larger, and energy consumption is reduced. Therefore, the defrosting effect of the non-azeotropic mixed working medium heat pump system is improved.

The utility model discloses a defrosting air duct structure of a vehicle air conditioner and the vehicle air conditioner, and belongs to the technical field of vehicle air conditioning equipment.The defrosting air duct structure comprises an air supply outlet and air supply channels communicating with the air supply outlet, and the air supply channels comprise the first air supply channel, the second air supply channel, the third air supply channel and the fourth air supply channel; the first air supply channel is provided with a first air outlet facing left glass of a main driving position of a vehicle body, the second air supply channel is provided with a second air outlet facing front glass of the main driving position of the vehicle body, and the third air supply channel is provided with a third air outlet facing front glass of a co-driving position of the vehicle body. The fourth air supply channel is provided with a fourth air outlet facing right glass of the copilot position of the vehicle body. According to the defrosting air duct structure, respective corresponding glass can be independently defrosted, a driver or a co-driver does not need to adjust the air supply position of the defrosting air duct structure in the defrosting process, and a guarantee is provided for the driver to have an all-dimensional clear and good driving view.

The application discloses a cold air machine air inlet water blocking structure and a cold air machine. The cold air machine air inlet water blocking structure comprises side plates arranged on both sides of an air inlet of a cabinet body, at least one water blocking plate connected between the two side plates, a heating pipe installed on an end surface of the water blocking plate away from the air inlet, and at least one closing plate connected between the two side plates. The closing plate is arranged on the side of the water blocking plate away from the air inlet, and a heating cavity for accommodating the heating pipe is formed between the closing plate and the water blocking plate. When defrosting operation is performed, the heating pipe can effectively defrost frost layers condensed on the surface of the water blocking plate, and the defrosting efficiency is improved.

The invention relates to a controller control method and device, electronic equipment, a medium and a program product. The controller control method comprises the steps that frosting information of the outdoor heat exchanger is obtained, wherein the frosting information is used for representing the frosting condition of each defrosting area; according to the frosting information, a target circulation branch connected with the defrosting branch is determined in the first circulation branch; and the target circulation branch and the defrosting branch are controlled to be conducted through the switching device, so that a refrigerant medium in the defrosting branch flows into the target circulation branch under driving of the compressor, and a defrosting area where the target circulation branch is located is defrosted. Therefore, the purpose of defrosting different defrosting areas in a targeted mode is achieved, the defrosting effect is improved, then the heating performance of the air conditioner and the comfort experience of a user are improved, and electric energy is saved.

According to the cascade type active enhanced vapor injection heat pump system and the control method thereof, the first stage is a low-temperature-stage conventional enhanced vapor injection heat pump, the supercooling degree is improved through conventional enhanced vapor injection so as to absorb more air energy, and a heat source is provided for the evaporation side of a second-stage high-temperature-stage heat pump; heat storage hot water is generated through heating of the low-temperature-stage heat pump and serves as an external heat source for active enhanced vapor injection of the second-stage high-temperature heat pump; the second stage is a high-temperature-stage active enhanced vapor injection heat pump, heat storage heat is converted into heating capacity in the form of injection enthalpy difference, and the performance of the heat pump unit is greatly improved. Besides, during defrosting of the system, the high-temperature-stage heat pump system does not participate in defrosting and keeps heating operation, the low-temperature-stage heat pump system performs heat storage defrosting through heat storage heat, enhanced vapor injection is performed in the defrosting process, the refrigerant circulation amount participating in defrosting operation is increased, the low pressure is increased, the defrosting speed is increased, and the defrosting effect is improved. And the exhaust superheat degree of the compressor in the defrosting process can be improved, and compressor damage caused by liquid return in the defrosting process is avoided.

The utility model relates to the technical field of heat pumps, in particular to a frostless air source heat pump. A frostless air source heat pump comprises an electric control system, a compressor, a refrigerator and an evaporator, the compressor, the refrigerator and the evaporator are communicated with one another through communication assemblies, a plurality of heat dissipation plates are arranged at one end of the evaporator, a shell is arranged on the surface of the evaporator, and an air inlet matched with the heat dissipation plates is formed in one end of the shell. The heat exchange effect of the evaporator is enhanced by increasing the heat exchange area through the heat dissipation plate, and the heat dissipation plate can be cleaned through the cleaning assembly, so that the heat dissipation plate is kept clean and tidy, the heat exchange efficiency is guaranteed, and more serious frosting is avoided. Therefore, the air conditioner has good heating and defrosting effects.

The invention discloses a quick-frozen food quick thawing device, and relates to the technical field of food thawing, the quick-frozen food quick thawing device comprises a device box and a box cover arranged at the top of the device box, and further comprises a conveying mesh belt horizontally arranged in the device box, and material stirring assemblies are arranged on the belt surface of the conveying mesh belt; and the two vibration assemblies are arranged on the inner walls of the two opposite sides of the device box correspondingly, through rotation of the conveying net belt, the material stirring assemblies are driven to move along the vibration assemblies, the vibration assemblies can be used for driving the material stirring assemblies to act, and the material stirring assemblies moving and acting along with the conveying net belt are used. According to the invention, continuous operation can be realized, the unfreezing efficiency can be improved, food can be vibrated and turned over, the food is heated more uniformly, adhesion is effectively prevented, the unfreezing uniformity is improved, the unfreezing effect is improved, waste heat can be effectively recovered, the energy consumption is reduced, and the purposes of saving energy and reducing the operation cost are realized.

The present invention relates to the technical field of horizontal freezers, and discloses a horizontal freezer with a defrosting function, comprising a freezer body, wherein a heat-insulating layer plate is fixedly connected inside the freezer body. The electric push rod is started to drive the push block to move to the right to push the sealing plate 1, and drive the pull rod to move downward, and the top of the pull rod drives the fixing frame to move downward through the fixed shaft, through which the sealing plate 1 seals the top of the air outlet pipe, and the sealing plate 2 is away from the air inlet slot to open it, at this time, the cold air will not enter the flow cavity, and the external hot air will enter the flow cavity through the air inlet slot, and enter the heat-insulating layer plate through the cold air inlet, melt the frost layer attached to the surface of the heat-insulating layer plate, and achieve the effect of defrosting, and at the same time, the heating wire is heated to transfer the heat to the surface of the heat-insulating layer plate, which can play the defrosting function again, improve the defrosting effect, and can achieve a more efficient defrosting effect without affecting the freezing, and does not require the staff to clean it again later.

The invention discloses an unfreezing device and a control method thereof and a refrigerator wherein the unfreezing device comprises an unfreezing chamber divided into an unfreezing area and a humidity compensation area; unfreezing equipment and flow guide equipment are arranged in the unfreezing area, the unfreezing equipment is used for unfreezing frozen articles, and the flow guide equipment is used for guiding unfrozen water generated in the unfreezing process to the humidity compensation area; the humidity compensation area is connected with the unfreezing area and is used for storing the unfreezing water and performing humidity compensation on the unfreezing area in the unfreezing process. The problem that in the prior art, thawing water generated by a thawing device is accumulated in a refrigerator is solved, the thawing water is effectively guided out and utilized, the accumulation problem is avoided, meanwhile, the situation that the appearance and quality are affected by air drying in the thawing process of objects is avoided, and the thawing effect of the objects is improved.

The utility model relates to the technical field of central air conditioners, and provides a central air conditioner condenser pipe defrosting device which comprises a base, a plurality of sets of supporting connecting rods, a water collecting disc assembly, an ice crushing assembly, a supporting assembly, a condensing coil pipe assembly and a top heating assembly. The water collecting disc assembly is arranged above the base through the supporting connecting rod, the condensing coil assembly is arranged above the water collecting disc assembly, the condensing coil assembly is fixedly installed on the water collecting disc assembly through the supporting assembly, the ice crushing assembly is fixedly installed in the water collecting disc assembly, and the ice crushing assembly is arranged below the condensing coil assembly. The top heating assembly fixedly installed on the supporting connecting rod is arranged above the condensing coil assembly. The defrosting device is reasonable in structure and convenient to use, the defrosting effect is enhanced, and the defrosting efficiency is improved.

The invention discloses a robot with a railway tunnel frost cleaning function, and relates to a railway tunnel cleaning machine, the robot comprises a chassis, the chassis is rotatably connected with hydraulic cylinders symmetrically distributed along the chassis, the chassis is rotatably connected with a rotating frame, piston rods of the hydraulic cylinders are rotatably connected with the rotating frame, and the hydraulic cylinders are rotatably connected with the rotating frame. The rotating frame is connected with a sliding frame in a sliding mode, at least one air cylinder is fixedly connected in the rotating frame, the telescopic end of the air cylinder is fixedly connected with the sliding frame, the sliding frame is connected with a measuring frame in a sliding mode, and the side, away from the air cylinder, of the measuring frame is connected with a roller in a rotating mode. The size of the through hole of the ball valve is automatically adjusted through extrusion fit of the roller and the frost surface, so that the rotating speed of the rotating frame driving the sliding frame and the cleaning roller to rotate along the frost surface of the inner wall of the tunnel is adjusted, the cleaning speed is adjusted according to the thickness of the frost, excessive defrosting in a thin area can be avoided, insufficient defrosting in a thick area can be avoided, and the cleaning efficiency is improved. The operation difficulty is low and the cost is low.

The present invention discloses a raw material thawing device and method for processing soaked duck feet, relates to the technical field of soaked duck feet processing, and aims to solve the technical problem that the existing soaked duck feet thawing device is difficult to reduce the operating burden and processing cost while ensuring the thawing efficiency, and includes a top cover, an outer cylinder, a chassis arranged below the outer cylinder, a sealed bearing, a thawing component and a bracket. The present invention designs an elastic component, a pressure component, a thawing component and a threaded rod, and when starting the motor, it is necessary to adjust the motor to run forward first, so that the device can complete the sinking of materials and continuously stir the liquid inside the device only by running forward, increase the flow rate of the water flow, improve the contact efficiency of the water flow and the raw materials, and accelerate the thawing effect of the raw materials. At the same time, it is convenient to take out the materials when running in the reverse direction, and the air is continuously discharged through the fan, thereby increasing the temperature of the liquid, so that the liquid temperature is synchronized with the room temperature, and the thawing efficiency of the soaked duck feet is further guaranteed.

The utility model relates to refrigeration equipment technical field, the utility model provides a refrigerator, include: casing, inner bag, frost plate, refrigeration subassembly and defrosting subassembly, the inner bag is located in the casing, and the inner bag includes bottom wall and a plurality of side walls, the inner surface of at least one side wall is equipped with frost plate, and the inner surface of frost plate is spaced and is equipped with a plurality of flow guide grooves along the first direction, and the flow guide groove extends along the second direction, and the inner surface bottom of frost plate is equipped with water collecting structure, and the flow guide groove is linked together with water collecting structure, and water collecting structure is equipped with drain, refrigeration subassembly includes compressor and coil evaporator, and the compressor is connected with coil evaporator, and the compressor is located in the casing, and coil evaporator is located in the outer surface of the side wall with frost plate, defrosting subassembly is located in the casing, and defrosting subassembly is used for heating frost plate to defrost frost plate.

The utility model discloses an anti-frosting glass curtain wall which comprises a frame body and glass arranged in the frame body, the frame body is connected with a defrosting mechanism through a lifting mechanism, the defrosting mechanism comprises a U-shaped connecting frame, a first motor is arranged in the U-shaped connecting frame, the first motor is connected with a first threaded rod, and the first threaded rod is connected with a second threaded rod. A plurality of first gears are arranged on the first threaded rod at equal intervals, a plurality of defrosting heads are rotationally connected to the side, close to the glass, of the U-shaped connecting frame, a second gear is arranged at one end of each defrosting head, and the first gears are meshed with the second gears. The anti-frosting glass curtain wall is simple in structure and convenient to use, the defrosting work of glass is achieved by arranging the defrosting mechanism capable of ascending and descending on the frame body, and meanwhile the defrosting effect can be improved by arranging the multiple defrosting heads.

The invention provides a defrosting control method and device of a heat pump unit and the heat pump unit. The defrosting control method of the heat pump unit comprises the steps that it is determined that the heat pump unit is in a heating mode, and the water inlet temperature and the water outlet temperature of a hot water pipe of the heat pump unit are obtained; determining that the water inlet temperature and the water outlet temperature meet a first set condition, and obtaining change parameters of working parameters of the heat pump unit within set time; and determining that the change parameter meets a second set condition, and controlling the heat pump unit to enter a special defrosting mode. According to the defrosting control method and device of the heat pump unit and the heat pump unit, the defrosting problem at different water temperatures can be fundamentally solved, the heating capacity of the unit is improved by improving the defrosting effect of the condenser, and the user experience is improved.

The application provides a defrosting device, a defrosting control method and a storage medium, which comprises a low-temperature space in a refrigeration chamber, a semiconductor module with a cold end and a hot end, a special air duct, a heat dissipation fan, a first temperature sensor, a second temperature sensor and a controller. In response to the start of the defrosting function, the controller controls the evaporator to stop cooling, controls the semiconductor module to be powered on and controls the heat dissipation fan to start, acquires a first evaporator temperature value detected by the first temperature sensor, controls the semiconductor module to be powered off when the first evaporator temperature value reaches a first preset temperature value, controls the evaporator to resume cooling, acquires a second evaporator temperature value detected by the first temperature sensor and a low-temperature space temperature value detected by the second temperature sensor, and controls the heat dissipation fan to stop when the second evaporator temperature value is lower than a second preset temperature value and the low-temperature space temperature value is lower than a third preset temperature value. The application solves the problems of low defrosting efficiency and high temperature rise in the refrigeration chamber in the prior art.

The invention discloses a control method of an air conditioner, the air conditioner and a storage medium, and relates to the technical field of air conditioners. An exhaust port and an air return port of a compressor in the air conditioner, a first heat exchanger and a second heat exchanger all communicate with a reversing assembly; a first pipe section between the first heat exchanger and the first throttling device is in heat exchange connection with a second pipe section on an air supply branch, one end of the air supply branch is connected with a third pipe section between the first pipe section and the first throttling device, the other end of the air supply branch is connected with an air supply port of the compressor, and the air supply branch is provided with an air supply valve. The method comprises the steps that the air conditioner is controlled to operate so that the first heat exchanger can be in a condensation state and the second heat exchanger can be in an evaporation state; under the condition that the air conditioner meets the defrosting starting condition, the first throttling device is controlled to increase the opening degree to the defrosting opening degree for operation, and the gulp valve is controlled to be opened; wherein the defrosting starting condition indicates that the second heat exchanger is in a frosting state. The indoor comfort in the defrosting process is improved, and meanwhile the defrosting effect is improved.

The application discloses an air conditioner comprising a refrigerant circulation system comprising a compressor, a first heat exchanger, a second heat exchanger, an electronic expansion valve and a third heat exchanger which are connected in sequence, and the second heat exchanger comprises a refrigerant pipeline and a water pipeline for heat exchange; the water circulation system comprises an air disc, an expansion water tank and a water pump which are sequentially connected in parallel, an outlet of the water pump is connected with an inlet of the water pipeline of the second heat exchanger, and an inlet of the air disc is connected with an outlet of the water pipeline of the second heat exchanger. The invention further discloses a method for controlling the air conditioner. The method comprises the steps that whether the air conditioner is frosted or not is determined according to the return air pressure of the compressor and the surface temperature of the third heat exchanger; and controlling the power of a water pump and / or the frequency of a compressor and the opening degree of an electronic expansion valve according to the condition whether the air conditioner is frosted or not. The defrosting heat is increased, the defrosting speed and the defrosting effect are improved, the liquid impact phenomenon of the compressor is reduced, and the reliability of the compressor and even the system is improved.

This invention discloses an energy-saving defrosting fresh air system and its control method, device, and storage medium. The control method of the fresh air system includes: controlling the fresh air system to operate in a first working mode, in which the preheating device is working; detecting environmental parameters in the exhaust side duct, and determining the environmental state of the heat exchanger based on the detection results of the environmental parameters; if the heat exchanger is in a frosting environment, controlling the preheating device to work, reducing the speed of the intake fan, and controlling the opening of the third air path. In the embodiment provided by the invention, based on the conventional use of the preheating device to defrost the heat exchanger, a portion of the indoor airflow is drawn back into the room using the third pipe to enhance the defrosting effect, while maintaining the introduction of fresh air. This reduces the fresh air volume while maintaining stable indoor air pressure, avoiding negative indoor pressure, ensuring the fresh air effect while achieving efficient and energy-saving defrosting.

The utility model relates to the technical field of refrigerators, and discloses a refrigerator with a defrosting device, which comprises a refrigerator main body and a sealing door movably arranged above the front side of the refrigerator main body, a fan is fixedly arranged on the top of the refrigerator main body close to the left side, an air inlet pipe is fixedly arranged on the right side of the fan, and an air outlet pipe is fixedly arranged on the right side of the air inlet pipe. A connecting pipe is fixedly installed on the left side of the fan, a heater is fixedly installed at the left end of the connecting pipe, a conveying pipe is fixedly installed in the middle of the bottom of the heater, and through mutual cooperation of a fixing rod, a threaded sleeve, a threaded rod, a flat plate, a servo motor and a supporting frame, a scraping plate can be driven to move downwards; therefore, defrosting operation can be conducted on the side face of the refrigerator body, the defrosting work can be completed without the help of tools such as a scraper knife by workers, certain heat can be provided for the air outlet mesh grid through operation of the draught fan and the heater, part of frost can be melted through hot air, and the defrosting effect is better.

The invention relates to the technical field of air conditioners and particularly provides an air conditioner and an air conditioner control method.The air conditioner comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger which are arranged on a refrigerant circulation loop, and the outdoor heat exchanger comprises a first heat exchange area and a second heat exchange area which are separated from each other; the first heat exchange area is arranged on the refrigerant circulation loop; one end of the refrigerant branch is arranged in front of an inlet of the first heat exchange area, the other end of the refrigerant branch is arranged behind an outlet of the first heat exchange area, and the second heat exchange area is arranged on the refrigerant branch; the first throttling valve is arranged in front of an inlet of the first heat exchange area, and the second throttling valve is arranged behind an outlet of the first heat exchange area; the third throttle valve is arranged in front of an inlet of the second heat exchange area, and the fourth throttle valve is arranged behind an outlet of the second heat exchange area; and the fifth throttle valve is arranged between the indoor heat exchanger and the outdoor heat exchanger. In the defrosting process, opening and closing of the throttling valve are controlled, and the outdoor heat exchanger can be defrosted in a partitioned mode while continuous indoor heating is achieved.