44results about How to "Frosting evenly" patented technology

The invention discloses an air conditioner indoor/outdoor unit cleaning method. The method comprises the steps of: controlling a heat exchanger to be cleaned to enter a self-cleaning mode; adjusting the operation frequency of an air conditioner, the openness of a throttling device and the rotating speed of a fan corresponding to the heat exchanger to be cleaned, and controlling the evaporation temperature of the heat exchanger to be cleaned to keep in a preset range to condense the surface of the heat exchanger to be cleaned; condensing the heat exchanger to be cleaned by t1 time; detecting if the high/low pressure difference of the air conditioner reaches preset conditions; controlling a four-way valve to change the direction to perform the defrosting switching of indoor and outdoor heat exchangers when the high/low pressure difference of the air conditioner reaches the preset conditions; and adjusting air conditioner operation parameters when the high/low pressure difference of the air conditioner dose not reach the preset conditions, and then, controlling the four-way valve to change the direction to perform the defrosting switching of the indoor and outdoor heat exchangers when the high/low pressure difference of the air conditioner reaches the preset conditions. As the direction change of the four-way valve can be controlled through detecting if the high/low pressure difference of the air conditioner reaches the preset conditions, the higher shock on the compressor caused by excessive high/low pressure difference of the air conditioner can be prevented.

The invention discloses an air-conditioner internal and external unit cleaning method. The method comprises the steps that an indoor heat exchanger is controlled to enter a frosting mode; operation frequency of an air-conditioner, the opening degree of a throttling device and the rotating speed of an indoor fan are adjusted to enable evaporating temperature of the indoor heat exchanger to be kept within the preset range and the surface of the indoor heat exchanger to be frosted; frosting of the indoor heat exchanger lasts for time t1, later, frequency of a compressor is reduced, a four-way valve is controlled to be reversed, an outdoor heat exchanger enters a frosting mode, and meanwhile, the indoor heat exchanger is defrosted; the operation frequency of the air-conditioner, the opening degree of the throttling device and the rotating speed of an outdoor fan are adjusted, the evaporation temperature of the outdoor heat exchanger is kept within the preset range, and the surface of the outdoor heat exchanger is frosted; frosting of the outdoor heat exchanger lasts for time t2, the compressor is controlled to be shut down, and the indoor fan and the outdoor fan are kept starting until cleaning is completed. According to the air-conditioner internal and external unit cleaning method, the problem that in the prior art, the surface of the heat exchanger is cleaned through condensate water, and the effect is poor can be solved.

The invention provides a wall-mounted air conditioner and a self-cleaning control method thereof. The self-cleaning control method is characterized in that according to the structure characteristic ofthe air conditioner with two cross-flow fans, in the self-cleaning refrigerating process, a left air area and a right air area are frosted separately, that is, the first cross-flow fan is started firstly, and a heat exchanger corresponding to the second cross-flow fan is frosted firstly; and then the first cross-flow fan is turned off, the second cross-flow fan is turned on, and at the moment, aheat exchanger corresponding to the first cross-flow fan is frosted then. In the self-cleaning process of the method, at most one air outlet discharges air, so that the cold amount output by an indoorunit in the refrigerating process is reduced, a user is prevented from feeling cold, and the use experience of the user is improved.

The invention provides a heat pump system. The heat pump system comprises at least one reversing valve, a compressor, at least one indoor heat exchanger, at least one outdoor heat exchanger and at least one throttling device. The outdoor heat exchanger comprises at least two independent flow paths and has three alternative work patterns, wherein the at least two independent flow paths in the outdoor heat exchanger respectively run as an evaporator when the first work pattern is selected, at least one of the at least two independent flow paths in the outdoor heat exchanger is at least partly used for defrosting and the rest of the at least two independent flow paths respectively run as the evaporator when the second work pattern is selected, and the at least two independent flow paths in the outdoor heat exchanger respectively run as a condenser when the third work pattern is selected.

The invention discloses a micro-channel evaporator and a control method thereof. The micro-channel evaporator comprises three liquid collecting pipes, flat pipes, fins, an electromagnet, a power supply and a throttle plate, wherein the throttling plate is added in the middle of the third liquid collecting pipe, throttling holes are formed in the throttling plate, the throttling plate is made of amagnetic material, the third liquid collecting pipe is provided with a protruding channel, and the electromagnet is arranged in the protruding channel. According to the evaporator, when the micro-channel evaporator works under a frosting working condition, the power supply is powered on, and the throttling plate can throttle a refrigerant flowing from a front-row heat exchanger, so that the temperature of a rear-row heat exchanger of the micro-channel evaporator is lower, the frosting capacity of the rear-row heat exchanger is higher, frosting performs towards the rear-row heat exchanger, uniform frosting of the micro-channel evaporator is achieved, and the performance of the micro-channel evaporator under the frosting working condition is improved; and when the micro-channel heat exchangeevaporator works under a non-frosting working condition, the power supply is cut off, and the throttling plate does not play a throttling role at the moment, so that the resistance of the micro-channel evaporator is reduced, and the improvement of the energy efficiency of the micro-channel evaporator is facilitated.

Cooler (107) provided on the back surface side of a refrigerator, the cooler for generating cool air, defrosting heater (132) provided below cooler (107), and cooler cover (120) having cool air return port (135) are provided. Center of defrosting heater (132) is set on the upper side of a lower surface of a freezing compartment, projection member (136) protruding into the interior side is arranged on the lower surface of the freezing compartment, and a lower end of cool air return port (135) and an upper end of projection member (136) are overlapped with each other in the height direction.

The application relates to the technical field of air conditioners, and discloses a method for self-clean control of an air conditioner. The method for self-clean control of the air conditioner comprises the following steps of after the air conditioner enters a self-clean mode, determining operation parameters of the air conditioner according to environment temperature and environment humidity; and controlling the air conditioner to operate according to the operation parameters to enable the surface of a heat exchanger to frost. According to the method disclosed by the invention, the operationparameters of the air conditioner can be subjected to self-adaption adjustment according to the environment temperature and the environment humidity, so that the accurate control of the self-clean function of the air conditioner is realized, frosting is more uniform, and the user experience is improved. The application also discloses a device for self-clean control of the air conditioner and theair conditioner.

The invention provides a return air duct which comprises a return air inlet, a first return air part, at least two branch return air parts and two return air outlets, wherein the return air inlet is positioned on a refrigeration box bladder; the top end of the first return air part is connected with the return air inlet; the at least two branch return air parts are respectively connected with the bottom end of the first return air part; and the two return air outlets correspond to the at least two branch return air parts and are spaced by a preset distance to ensure that an evaporator of a refrigerator uniformly frosts. Through the return air duct, return air can be guided to both sides of the refrigerator so as to ensure that the evaporator uniformly frosts, thereby the working efficiency of a frost melting heater is greatly improved, and the energy consumption is reduced.

The invention discloses a novel U-shaped fin tube heat exchanger and a fixing mode thereof. A common U-shaped fin tube heat exchanger is designed into a horizontal U-shaped heat exchanger with an upward opening, a gas collecting tube assembly is horizontally arranged, the gas collecting tube assembly and a dispenser assembly are respectively assembled outside one side of the fin tube heat exchanger, and an end plate I and an end plate II are respectively shaped into a U-shaped structure. The invention has the advantages of ensuring that pressure drops of refrigerants of all refrigerant loops are consistent and wind circulation of each refrigerating system is more uniform, effectively solving the problem of nonuniform defrosting of heat exchangers adopting other fixing modes, and reducing the height of the whole set because an outdoor condensing fan blade and a motor are installed in a space in the U-shaped fin tube heat exchanger.

The invention relates to a spliced aluminum alloy fin calandria evaporator which comprises a plurality of parallelly arranged aluminum alloy fin tubes, elbows, guide screws, partition tubes and holding nuts, wherein every two adjacent aluminum alloy fin tubes and one elbow are connected to form a U-shaped parallel unit, the two aluminum alloy fin tubes of each parallel unit respectively serve as a liquid inlet tube and a liquid outlet tube; the calandria evaporator provided by the invention is also provided with a liquid distributor; and the liquid distributor is provided with a liquid inlet and liquid outlets the quantity of which is same as that of the liquid inlet tubes, the liquid inlet tube of each parallel unit is communicated with a refrigerating fluid inlet tube through the liquid distributor, and the liquid outlet tube of each parallel unit is communicated with a refrigerating fluid outlet tube. The spliced aluminum alloy fin calandria evaporator provided by the invention has the advantages of adopting a parallel connection method to realize more uniform refrigeration, avoiding the problem that the temperature of a refrigerating fluid is increased along with the increment of the length of the passed distance, meeting the requirement of a large cold storage, ensuring the temperature in the large cold storage to be uniform, adopting the aluminum alloy fin tubes, ensuring good heat exchange effect, and ensuring uniformly frosting on fins.

The invention relates to the technical field of an electric refrigerator in household appliances, in particular to a fin evaporator, which comprises a fixing plate, two lines or a plurality of lines of evaporation pipes and a plurality of fins, wherein the evaporation pipes are arranged on the fixing plate, the fins are sheathed on the evaporation pipes, and the evaporation pipes enter the evaporator from the top layer, spirally go downwards in a snake shape at each layer, and are sent out of the evaporator at the bottom layer. The air supply direction is upward from the bottom, the flowing direction of refrigerants in a pipeline is generally opposite to the air supply direction, through adopting the convection mode, the heat exchange is enhanced, and the cooling capacity transfer efficiency is improved. The refrigerant pipeline direction is integrally downward from the top, and the distance between an inlet section and an outlet section of each evaporation pipe reaches the maximum value. The temperature differences of the inlet section and the outlet section of each evaporation pipe are great, the heat exchange of the traditional evaporator through the fins since the inlet section and the outlet section of the evaporation pipe are adjacent is avoided, i.e., the cooling capacity grade reduction is avoided, and the cooling capacity utilization rate is improved. The frosting non-uniformity of the fins on the air supply cross section of the traditional evaporator, and the air supply non-uniformity and the heat exchange efficiency reduction due to the frosting non-uniformity are avoided.

The invention relates to a staggered-parallel-type aluminum alloy finned tube evaporator which comprises a plurality of finned tubes and a bend tube; the plurality of finned tubes are arrayed in parallel; the two adjacent finned tubes are staggered up and down; the upper fins of the lower finned tubes are corresponding to the lower fins of the upper finned tubes; two finned tubes at intervals are at the same level; two ends of the bend tube are respectively connected with two finned tubes, thus a parallel unit is formed; two finned tubes of each parallel unit are respectively a liquid inlet tube and a liquid outlet tube, and are provided with a liquid distributor; the liquid distributor is provided with a liquid inlet and liquid outlets the number of which is corresponding to the number of the liquid inlet tubes; the liquid inlet tubes of each parallel unit are communicated with a refrigerant liquid inlet pipeline through a liquid distributor; and the liquid outlet tubes of each parallel unit are communicated with the refrigerant liquid inlet pipeline. According to the invention, through adopting the up and down staggered array mode of the finned tubes, the mutual influence between the adjacent finned tubes is reduced, the refrigeration speed is accelerated, more uniform refrigeration is realized through the parallel connection mode, the frosting on the fins is uniform.

The invention provides a direct cooling refrigerator. The direct cooling refrigerator comprises an inner container, wherein an evaporation tube stack is arranged between the inner container and a direct cooling refrigerator shell; the evaporation tube stack at least comprises a first evaporation tube and a second evaporation tube; at least one of the first evaporation tube and the second evaporation tube is a container-winding evaporation tube. By adopting the direct cooling refrigerator, the effect of saving energy can be achieved.

The invention belongs to the technical field of air conditioners, and particularly relates to a frosting control method of an air conditioner. In order to guarantee frosting uniformity of the air conditioner to improve defrosting efficiency, the defrosting control method of the air conditioner is provided for the air conditioner provided with double fans on an outdoor unit. The method comprises steps as follows: detecting a temperature t(upper) of the upper part of an outer coil pipe and a temperature t(lower) of the lower part of the outer coil pipe in a heating operation process of the air conditioner; detecting current I(upper) of an upper fan and current I(lower) of a lower fan under the conditions that t(upper) is lower than or equal to a dew point temperature and t(lower) is lower than or equal to the dew point temperature; controlling the revolution speed of the lower fan to be increased by first preset number of revolution if I(upper) is larger than I(lower); controlling the revolution speed of the upper fan to be increased by first preset number of revolution if I(upper) is smaller than I(lower); and controlling revolution speeds of the upper fan and the lower fan to be equal if I(upper) is equal to I(lower). According to the method, frosting uniformity can be controlled reasonably, frosting of the outdoor unit is more uniform, defrosting is facilitated by the aid of uniform frosting, and the defrosting efficiency is improved.

The invention relates to a gas guide device used for a freeze dryer condenser which comprises a cylinder body and a plurality of three-stage heat exchange plates that are arranged in the cylinder body in a fan shape, wherein the cylinder body is connected with an external vacuum pump through a pipeline, the pipeline is provided with a vacuum aspirating hole, the gas guide device comprises a guide plate and a plurality of bent fixing plates connected to one side surface of the guide plate at intervals, a clamping structure is formed to be clamped and fixed on the three-stage heat exchange plate close to the vacuum aspirating hole, the guide plate supports against one side surface of the three-stage heat exchange plat, and the top edge of the guide plate supports against the inner wall of the cylinder body. The invention effectively ensures that airflow is uniformly distributed on the periphery of the three-stage heat exchange plates so as to play a role of uniformly guiding to make the surfaces of the three-stage heat exchange plates frost uniformly, thereby avoiding reducing the condensing capacity of the condenser.