67results about How to "Improve frosting" patented technology

The invention discloses a micro channel heat exchanger for an air-conditioner heat pump. The heat exchanger comprises an upper head pipe, a lower head pipe, a plurality of flat pipes and a plurality of fins, wherein the upper head pipe is parallel with the lower head pipe; the plurality of flat pipes connect the upper head pipe and the lower head pipe and are parallel at intervals; opening holes communicating with the insides of the upper head pipe and the lower head pipe are reserved in the flat pipes; the plurality of fins are arranged between adjacent flat pipes along the length direction of the flat pipes; and the distribution density of the fins is reduced gradually from the upper head pipe to the lower head pipe along the length direction of the flat pipes. According to the micro channel heat exchanger, the air side heat transfer coefficient of the heat exchanger can be improved and the air side flow resistance can be reduced; and the surface tension born by condensate water on the surfaces of the flat pipes is low both under cooling and heating working conditions and the condensate water is hard to stay in gaps of the fins, so that the wind resistance is reduced and heat transfer is not influenced, the discharge of the condensate water is improved, and frost formation is also improved at the same time.

The invention relates to an air conditioner comprising a refrigerating / heating loop and an air conditioner controlling device, wherein the refrigerating / heating loop is formed by connecting a compressor, a four-way valve, an indoor heat exchanger, a throttling mechanism and an outdoor heat exchanger in sequence; the air conditioner controlling device is used for controlling various components of the air conditioner to act according to a control signal; the refrigerating / heating loop is provided with an injection enthalpy-gaining bypass loop and a defrosting bypass loop; one end of the injection enthalpy-gaining bypass loop is connected with an air-suction port in the middle of the compressor and the other end of the injection enthalpy-gaining bypass loop is connected between the throttling mechanism and the indoor heat exchanger; the injection enthalpy-gaining bypass loop is at least provided with an injection enthalpy-gaining throttling mechanism; one end of the defrosting bypass loop is connected between the four-way valve and the indoor heat exchanger and the other end of the defrosting bypass loop is connected between the throttling mechanism and the outdoor heat exchanger; the defrosting bypass loop is provided with an automatic defrosting control valve and a throttling mechanism for defrosting; the air conditioner is also internally provided with a defrosting condition detection unit; and the defrosting condition detection unit and the automatic defrosting control valve are in signal connection with the air conditioner controlling device.

The invention discloses a refrigerating and defrosting method for a movable air conditioner and further discloses the movable air conditioner and a storage medium. The refrigerating and defrosting method for the movable air conditioner comprises the steps that when the movable air conditioner is in a refrigerating mode, the temperature of an indoor heat exchanger is detected; whether the temperature of the indoor heat exchanger is lower than the preset frosting temperature or not is judged; and when the temperature of the indoor heat exchanger is lower than the frosting temperature, operatingparameters of the movable air conditioner are adjusted to increase the temperature of the indoor heat exchanger. According to the technical scheme, by detecting the temperature of the indoor heat exchanger and judging whether the temperature of the indoor heat exchanger is lower than the preset frosting temperature or not, whether the frosting risk exists in the indoor heat exchanger or not is determined, when the frosting risk exists in the indoor heat exchanger, the operating parameters of the movable air conditioner are adjusted to improve the frosting situation of the indoor heat exchanger, thus the frosting situation of the indoor heat exchanger can be improved without operating stopping of a compressor, and the user experience is improved while the heat exchanging effect and system operating reliability are ensured.

The invention discloses a manufacture method of a micro-channel heat exchanger and a device in the technical field of heat exchange devices. Firstly, a framework of the micro-channel heat exchanger is formed through a cold extruding process, then, fins are tightly fixed in the framework of the micro-channel heat exchanger through an assembling mechanism, finally, glue is coated at the contact positions of finned flat tubes, and the micro-channel heat exchanger is manufactured. The micro-channel heat exchanger comprises the framework of the heat exchanger and a plurality of fins, wherein the framework of the heat exchanger is composed of collecting mains and the flat tubes, the fins are arranged on the framework of the heat exchanger, conduits which are used for being inserted into the flat tubes are arranged on the collecting mains and a plurality of micro-channel structures are arranged inside the flat tubes. The manufacture method of the micro-channel heat exchanger and the device solve the problem of high energy consumption in the manufacture process of the micro-channel heat exchanger, production consumption is saved, and cost of the heat exchanger is reduced.

The invention discloses a fin evaporator applied to a refrigerator, a manufacturing method and the refrigerator with the fin evaporator. The fin evaporator applied to the refrigerator comprises a plurality of evaporating pipes, multiple groups of fins and multiple U-shaped connecting pipes, wherein the evaporating pipes are respectively U-shaped and mutually and vertically arranged at intervals; the fins are horizontally arranged side by side, the evaporating pipes penetrate the fins sequentially, each group of fins comprise a plurality of sub-fins arranged side by side, and the lengths of every two adjacent sub-fins are unequal; and the evaporating pipes are sequentially connected through the connecting pipes. According to the fin evaporator provided by the invention, as the plurality of U-shaped evaporating pipes are adopted and penetrate the multiple groups of the fins, the matching of the fins and pipelines of the U-shaped evaporating pipes are more tight, so that the heat exchange effect of the fin evaporator is improved; and as the sub-fins in different lengths are arranged, the heat exchange superficial area of the fin evaporator is increased, so that the heat exchange efficiency of the fin evaporator is effectively improved.

The invention discloses an air-cooling heat pump using the excess heat of a compressor for frost prevention, comprising a refrigeration agent loop, a flat panel loop heat pipe and an outdoor unit fan; wherein the refrigeration agent loop is formed by the compressor, an outdoor heat exchanger, a throttling device and an indoor heat exchanger; an exhaust pipe of the compressor is connected with an inlet of the indoor heat exchanger, and an outlet of the indoor heat exchanger is connected with an inlet of the throttling device; an outlet of the throttling device is connected with an inlet of the outdoor heat exchanger, and an outlet of the outdoor heat exchanger is connected with an air suction pipe of the compressor; the flat panel loop heat pipe is formed by a metal evaporation cavity, a condensation part, a vapor phase metal pipeline, a liquid phase metal pipeline and a metal heat dissipation fin; when in heating operation in the winter, the air-cooling heat pump clings to the metal evaporation cavity on the top of the compressor to be heated under the condition of needing no extra power, a working medium inside the cavity is evaporated and vaporized, and the heat is brought to the condensation part and used for heating the air at the inlet of the outdoor heat exchanger, so that frost formation can be prevented.

The invention provides a solar heat pump system based on phase change heat storage and heat pipe heat transfer. The solar heat pump system comprises an expansion valve, a compressor, a condenser, a solar heat collection evaporator, heat pipes and an energy accumulator; the solar heat collection evaporator comprises a evaporator body and solar radiation plates, wherein the solar radiation plates form a box body structure, the evaporator body is located in the box body structure, and the box body structure is internally filled with a liquid medium and is used for storing heat energy absorbed by the solar radiation plates in a liquid medium; the evaporator body is connected to the compressor, the condenser and the expansion valve in sequence through pipelines to form a closed loop; one ends of the heat pipes are inserted into the box body structure, and the other ends of the heat pipes are inserted into the energy accumulator; and the heat pipes are closed metal pipes, and the interiors of the heat pipes are filled with a phase change material. According to the solar heat pump system, the evaporation temperature of a heat pump can be improved, the frosting problem in the heating process of an air source heat pump in winter can be solved, and the heat transfer efficiency in the the energy storage and energy release processes of the phase change material can be improved.

The invention relates to a finned tube evaporator for an air-cooled refrigerator and an air-cooled refrigerator. The evaporator is arranged in an evaporator cavity of the air-cooled refrigerator and comprises a plurality of layers of finned tubes, each finned tube is composed of an evaporator tube and a plurality of fins; along the vertical direction, the number of the evaporator tubes on each layer of finned tubes is unequal. According to the finned tube evaporator, the number of the tubes gradually increases from the bottom to the top, the number of the windward pipes of the evaporator is increased, the problem that a large amount of frost is accumulated at the bottom of the evaporator can be effectively relieved, the heat generated by the electric heater in the defrosting process can rapidly reach the top of the evaporator, so that the defrosting synchronism is improved, and the defrosting energy consumption is reduced.

The invention provides a heating heat pump system used in an ultralow-temperature environment. The heating heat pump system comprises a main circulation loop which is composed of a first compressor (1), a first condenser (2), a vortex tube (4) and an evaporator (7), wherein the first condenser (2) is used for exchanging heat with a first water pipe (16) to make hot water or achieve heating, and a second condenser (5) is arranged on a pipeline between the first condenser (2) and the evaporator (7). The heating heat pump system further comprises an auxiliary circulation loop which is connected with the main circulation loop in an overlying mode through the second condenser (5), wherein the auxiliary circulation loop is used for exchanging heat with a second water pipe (17) to make hot water or achieve heating. By means of the heating heat pump system, heat of refrigerant in the main circulation loop can be further absorbed, intermediate-temperate water is made through the overlying circulation loop and is supplied together with high-temperature water made through the first condenser, the temperature range of made hot water is widened, intelligent regulation of the water temperature is achieved, and different demands of different users for hot water are met; energy at the hot end of the vortex tube is effectively utilized, and the COP of the system is improved.

The invention discloses a double-layer parallel flow evaporator which comprises two groups of cooling core bodies which are vertically arranged adjacent to each other, wherein the upper-layer cooling core body consists of a first collector tube, a second collector tube, and a plurality of flat tubes connected between the first collector tube and the second collector tube; the lower-layer cooling core body consists of a third collector tube, a fourth collector tube, and a plurality of flat tubes connected between the third collector tube and the fourth collector tube; separation plates are arranged among the first collector tube, the second collector tube, the third collector tube and the fourth collector tube; the left part of the first collector tube is connected with a liquid inlet tube, and the right part of the first collector tube is connected with a gas outlet tube; and the corresponding parts of the left and right parts of the second collector tube and the fourth collector tube are communicated with each other. According to the double-layer parallel flow evaporator, a refrigerant flows horizontally and is uniform in flow velocity; and according to the collector tubes which are vertically arranged, the cycle efficiency of compressor refrigeration oil is improved, the maintenance rate of an air-conditioning system is reduced, the utilization rate of the radiating area is improved, and the problem that the evaporator is frosted and wetted is effectively improved.

The invention discloses a capacitive frosting thickness detection device and a capacitive frosting thickness detection method, which relate to the technical field of frosting thickness detection. The capacitive frosting thickness detection device is characterized in that: a sampling region capacitance plate, an intermediate capacitance plate and a reference region capacitance plate are sequentially fixed on a fixing bracket in parallel at equal distance, a sampling region is form between the sampling region capacitance plate and the intermediate capacitance plate, a reference region is form between the intermediate capacitance plate and the reference region capacitance plate, and the reference region is filled with a reference dielectric; and a sampling circuit is connected to the outer side of the sampling region capacitance plate, and is connected to a data storage and analysis device by means of a data transmission line. According to the capacitive frosting thickness detection device and the capacitive frosting thickness detection method, the sampling reference is established by means of the intermediate capacitance plate and the reference region capacitance plate, and the capacitance between the sampling region capacitance plate and the intermediate capacitance plate is compared with the sampling reference, thus real-time detection of frosting thickness is realized, and defrosting is conducted conveniently when the frosting thickness reaches a defrosting requirement; and the precision of frosting thickness judgment is greatly increased, thereby avoiding energy waste caused by ineffective defrosting because the frosting thickness does not match the empirical criterion.

Provided is a heat pipe heat storage type air conditioner heat pump device capable of recovering waste heat. The device comprises an air conditioning system module and a heat pump system module, wherein the air conditioning system module comprises an air conditioner compressor and an air conditioner condenser which are connected with each other, and the heat pump system module comprises an anti-disturbing water tank and a combined heat pipe condensation evaporator; the device also comprises a phase change heat storage tank, a waste water collection tank and a heat source heat exchange tank; the phase change heat storage tank is provided with an air conditioner exhaust pipe and a phase change heat pipe condensation section, and the air conditioner exhaust pipe is connected to the air conditioner compressor and the air conditioner condenser separately; the heat source heat exchange tank comprises a heat source tank body and a heat source heat exchange tube, the heat source heat exchangetube is in annular loop connection with the phase change heat pipe condensation section, and the heat source tank body is connected with the anti-disturbing water tank; the waste water collection tankcomprises a waste water tank body and a waste water heat exchange tube, and the waste water heat exchange tube is connected with a water supply source and the heat source tank body. The heat pipe heat storage type air conditioner heat pump device capable of recovering the waste heat can effectively improve the thermal efficiency of the operation of an air conditioner and an air source heat pump water heater, improve the frosting phenomenon of a heat pump evaporator during low temperature evaporation, and effectively recover the waste heat of bath waste water.

The invention relates to the technical field of air conditioner defrosting, and discloses a control method for air conditioner defrosting. The control method comprises the following steps that the temperature of a first indoor coil is obtained under the condition that an air conditioner enters a reverse cycle defrosting mode; if the temperature of the first indoor coil meets a heating opening condition, liquid inlet refrigerant of an indoor heat exchanger is controlled to be heated; and when a heating duration meets a set duration condition, a compressor is controlled for air supplementing. According to the control method, under the condition that the air conditioner runs in the reverse cycle defrosting mode, the liquid inlet refrigerant of the indoor heat exchanger is controlled to be heated according to the temperature of the indoor coil, and air supplementing is carried out on the compressor according to the heating duration; and the temperature and the flow rate of gaseous refrigerant in air return refrigerant of the compressor are improved by utilizing the liquid inlet refrigerant of the heat exchanger in a heating chamber and the air supplementing mode of the compressor so asto solve the problem that the defrosting capacity of the air conditioner decreases with time. The invention further discloses a control device for air conditioner defrosting and the air conditioner.

The invention relates to the technical field of low-temperature or ultralow-temperature application, in particular to a liquefied natural gas filling device, in particular to a vacuum anti-freezing filling gun. The vacuum anti-freezing filling gun comprises an outer sleeve, an inner sleeve and a one-way valve core assembly. The inner sleeve can be sleeved with the outer sleeve, and the outer sleeve can slide relative to the inner sleeve. The one-way valve core assembly is assembled at one end of the inner sleeve in a sealed manner. A vacuum layer is arranged in the sleeve wall of the inner sleeve. Due to the mechanism mentioned above, low-temperature conduction can be reduced through the vacuum layer of the inner sleeve, so that the frosting possibility and freezing possibility of handle mechanisms, a locating ring and clamping claw movement mechanisms are relieved and lowered in the filling process, and the operating flexibility is guaranteed to the maximum extent; due to the fact that a pull rod and other movable connecting components are eliminated, size adjustment of the pull rod is not needed, the size of a main body structure is more stable through the design and structure guarantee, and the potential safety hazards such as the condition that a filling gun retreats by accident due to insufficient pressure relief are eliminated; and meanwhile shaft sleeve locating is added between the inner sleeve and the outer sleeve, locating accuracy is higher, and the effect that the handle mechanisms are free of loosening, swinging and other phenomena in the use process is guaranteed, so that operation is more stable and convenient.

The invention provides a dehumidifier and a control method thereof. The dehumidifier comprises a compressor, a condenser, a throttling device and an evaporator which are connected with one another in sequence through pipelines, and further comprises an auxiliary heat exchanger and a control device, wherein one end of the auxiliary heat exchanger is connected with the output end of the compressor through a first pipeline; the other end of the auxiliary heat exchanger is connected with the input end of the throttling device through a second pipeline; the control device is connected with the first pipeline and the second pipeline and is used for acquiring a temperature value of the evaporator, and controlling connection and disconnection between the first pipeline and the second pipeline to enable the auxiliary heat exchanger to exchange heat with the evaporator so as to prevent the evaporator from being frosted. According to the dehumidifier provided by the invention, by virtue of adding bypass heat exchange of the auxiliary heat exchanger for preventing the evaporator from being frosted, the dehumidification amount of the dehumidifier under a low-temperature working condition is increased, and the problems of frosting on the surface of the evaporator of the dehumidifier under the low-temperature working condition and deterioration of heat exchange due to the frosting are solved.

The invention provides an air cooling refrigerator and a defrosting control method thereof. Firstly, whether the wind volume changing speed of airflow flowing through an evaporator of the air coolingrefrigerator is larger than the preset wind volume changing speed threshold value or not is judged, if the wind volume changing speed of airflow flowing through the evaporator of the air cooling refrigerator is larger than the preset wind volume changing speed threshold value, whether a compressor of the air cooling refrigerator meets the defrosting condition or not is judged, and if the defrosting condition is met, the defrosting process of the air cooling refrigerator is triggered. When the compressor meets the defrosting condition, it is not indicated that the evaporator needs to be defrosted, if evaporator defrosting can influence the refrigeration effect of the air cooling refrigerator at the time and the defrosting degree of the evaporator surface is different, the wind volume changing speed of airflow flowing through the evaporator of the air cooling refrigerator can change, and therefore whether the evaporator needs to be defrosted or not is jointly judged according to the windvolume changing speed and the compressor defrosting condition, and air cooling refrigerator defrosting control accuracy can be improved.

The invention provides a solar heat pump system based on phase change heat storage. The solar heat pump system based on phase change heat storage comprises a hot water system and a heat pump system. The hot water system comprises an evacuated tubular solar heater, a water pump and a heat insulation tank. The water pump is in closed-loop connection with the evacuated tubular solar heater and the heat insulation tank through a pipeline in sequence. The evacuated tubular solar heater is filled with a liquid medium and stores solar energy absorbed by the evacuated tubular solar heater in the liquid medium. The heat pump system comprises a condenser, an expansion valve, an evaporator and a compressor. The compressor is in closed-loop connection with the condenser, the expansion valve and the evaporator through a pipeline in sequence. The evaporator is located in the heat insulation tank. An inlet and an outlet of the evaporator are located in a shell of the heat insulation tank. The heat insulation tank is filled with functional hot fluid. The evaporator and the liquid medium are made to conduct heat exchange through the functional hot fluid. The solar heat pump system based on phase change heat storage can prevent frosting in winter. The performance of the COP solar heat pump system can be improved.

The invention provides a high-efficiency air-condition heat exchanger fin and a heat exchanger, which can solve the problem of low heat exchange efficiency and the like existing in the prior art. The invention has the technical scheme that the high-efficiency air-condition heat exchanger fin is provided with at least one column of fins; each column of fins is provided with a plurality of copper pipe holes; the upper side and the lower side of each copper pipe hole are symmetrically provided with identical window slice units; each window slice unit is formed by symmetrically arranging identical window slice groups left and right; each window slice group comprises the identical short window slice groups which are arranged up and down at intervals at the outer side and a middle long window slice group; the short window slice groups and the long window slice group are provided with a plurality of window slices; and each window slice is obliquely arranged at the same angle. The heat exchange ability and the overall energy efficiency ratio can be improved by adopting heat exchanger of the fin, and the cost is reduced to a greater degree; simultaneously, the frosting problem of the external heat exchanger of an air-condition chamber is considered, so the fin structure is more convenient for frost removal.

The invention discloses a cleaning method of an air conditioner. The method comprises the following steps of identifying that the air conditioner receives a cleaning instruction; controlling the surface of an outdoor heat exchanger to frost; controlling the outdoor heat exchanger to defrost so as to remove dust of the outdoor heat exchanger. According to the method, after identifying that the airconditioner receives the cleaning instruction, frosting and defrosting can be carried out on the surface of the outdoor heat exchanger on the basis of controlling the air conditioner, and then all fans in the outdoor heat exchanger are continuously controlled to perform reverse operation at different rotating speed combinations after defrosting is finished, so that a front air field can be formed,the outdoor heat exchanger is subjected to dust removal, accumulated dust on the surface of the outdoor heat exchanger can be reduced, the heat exchange effect of the outdoor heat exchanger of the air conditioner is guaranteed, and the air conditioner can play the best performance.

The invention discloses a refrigerator with an air pressure adjusting structure, and relates to the technical field of refrigerators. The refrigerator comprises a refrigerator body and a door body. The door body comprises a door shell, a door lining and a lower decorative strip. First air holes are formed in one surface of the door lining. Second air holes are formed in the lower surface of the lower decorative strip. A breather pipe is vertically arranged between the door shell and the door lining. The breather pipe comprises a first branch pipe and a second branch pipe. The lower end of thefirst branch pipe abuts against the upper end openings of the second air holes. The upper end of the first branch pipe is connected with the lower end of the second branch pipe. The outer wall of thesecond branch pipe is radially connected with a shunt pipe communicating with the second branch pipe. One end of the shunt pipe abuts against the inner end openings of the first air holes. A frost blocking part is arranged in the lower end of the first branch pipe. The frost blocking part is used for filtering water vapor in the external air when the external air enters the refrigerator body through the breather pipe. And a floating ball is arranged in the second branch pipe. By means of the refrigerator with the air pressure adjusting structure, the pressure difference between the inside andthe outside of the refrigerator can be effectively balanced, and the market application value is high.

The invention belongs to the technical field of air conditioners, and discloses a fluid compensation type air conditioning system, a control method, computer equipment and a terminal. Under a heating mode, a high-temperature refrigerant discharged from a compressor enters an evaporator to exchange heat, and flows into a flow distributor through a throttling device; at an initial moment, a B-direction channel of the flow distributor is closed, so that all refrigerant flows out from a C-direction channel, enters from the lower end of a micro-channel heat exchanger to reversely circulate in an S-shaped mode, and flows out from the upper end of the heat exchanger; a pressure measuring meter and a temperature measuring meter are arranged at the outlet to detect pressure and temperature at the outlet every 30s; and a saturated temperature value Tpn is calculated according to a measured saturated pressure value Pn, and a test value Tn is compared with the calculated value Tpn. Heating performance under the heating mode of the micro-channel heat exchanger can be improved, so that the problem that a micro-channel is liable to frost is solved, continuous heating is realized, heating comfort is improved, and a frosting condition of the air conditioner is effectively improved.

The invention discloses a heat exchange system which comprises at least one heat exchanger. The heat exchanger comprises a first collecting pipe and a second collecting pipe, multiple heat exchange pipes used for circulation of a first heat exchange medium and spacing parts, wherein two ends of each of heat exchange pipes are connected to the first collecting pipe and the second collecting pipe respectively, each of the heat exchange pipes comprises at least three straight sections and at least two bent sections, the multiple heat exchange pipes are arranged to form multiple heat exchange units, and the straight sections of each of the heat exchange pipes of the same heat exchange unit are mutually parallel; each of the spacing parts is disposed between the adjacent heat exchange pipes ofthe same heat exchange unit, the spacing part between the adjacent heat exchange pipes are disposed at an interval along the length direction of the heat exchange pipes and thus a through hole is formed; and a flow direction of a second heat exchange medium which passes through the through hole is not parallel with the straight sections, so the second heat exchange medium successively flows through the different straight sections of each of the heat exchange pipes. The heat exchange system disclosed by the embodiment of the invention is characterized in that heat exchange is mainly realized bythe heat exchange pipes and has the beneficial effects that heat exchange efficiency is high; heat exchange capability is high, etc.

The invention provides an air-cooled refrigerator with an ice making function. The air-cooled refrigerator comprises a refrigerator body, a cold storage chamber, a freezing chamber and a cold storagechamber door body for opening and closing the cold storage chamber. An ice making chamber is arranged on the cold storage chamber door body. And the air-cooled refrigerator further comprises: an evaporator, which is used for cooling air flowing through the evaporator; a freezing air supply duct, which is used for conveying the air cooled by the evaporator into the freezing chamber; an ice-making air supply duct, which has one end communicated with the freezing chamber and the other end communicated with the ice-making chamber; and an ice-making air feeder, which is used for blowing cold air inthe freezing chamber to the ice-making air feeding duct; wherein the ice-making air feeder is arranged in the freezing chamber or the freezing air supply duct and is close to the ice-making air supply duct. The ice-making air feeder directly sucks air from the freezing chamber and does not directly suck air through the evaporator or supply air through the evaporator, so that the air suction resistance is small, the air volume is large, and the frosting condition of the evaporator can be greatly improved.

The invention belongs to the technical field of air conditioners, and aims to solve the problem that the self-cleaning control mode of an existing air conditioner is generally slow in frosting speed,so that the whole self-cleaning time is long, and the normal experience of a user is influenced. In order to solve the problem, the invention provides a self-cleaning control method for an air conditioner. The air conditioner comprises a refrigerant circulation system and a solution circulation system composed of an indoor solution film, an outdoor solution film, a liquid pump and a liquid storagetank; the self-cleaning control method comprises the steps that under the refrigeration working condition, frequency ascending is carried out on a compressor, an indoor fan of the air conditioner isclosed, and the rotating speed of the liquid pump is increased, so that an indoor heat exchanger is frosted; after the indoor heat exchanger is frosted, an electronic expansion valve is closed firstly, and then an electromagnetic valve at the low pressure side of the compressor is closed after a preset time; and the indoor heat exchanger is heated, so that the indoor heat exchanger is subjected todefrosting cleaning. According to the self-cleaning control method for the air conditioner, the self-cleaning efficiency of the indoor heat exchanger can be improved, and the user experience can be improved.

The invention relates to the technical field of low-temperature or ultralow-temperature application, in particular to a liquefied natural gas filling device, in particular to a vacuum anti-freezing filling gun. The vacuum anti-freezing filling gun comprises an outer sleeve, an inner sleeve and a one-way valve core assembly. The inner sleeve can be sleeved with the outer sleeve, and the outer sleeve can slide relative to the inner sleeve. The one-way valve core assembly is assembled at one end of the inner sleeve in a sealed manner. A vacuum layer is arranged in the sleeve wall of the inner sleeve. Due to the mechanism mentioned above, low-temperature conduction can be reduced through the vacuum layer of the inner sleeve, so that the frosting possibility and freezing possibility of handle mechanisms, a locating ring and clamping claw movement mechanisms are relieved and lowered in the filling process, and the operating flexibility is guaranteed to the maximum extent; due to the fact that a pull rod and other movable connecting components are eliminated, size adjustment of the pull rod is not needed, the size of a main body structure is more stable through the design and structure guarantee, and the potential safety hazards such as the condition that a filling gun retreats by accident due to insufficient pressure relief are eliminated; and meanwhile shaft sleeve locating is added between the inner sleeve and the outer sleeve, locating accuracy is higher, and the effect that the handle mechanisms are free of loosening, swinging and other phenomena in the use process is guaranteed, so that operation is more stable and convenient.

The invention provides a low wind resistance type thin evaporator and an indoor unit of an air conditioner and can be used for solving the problems in the prior art that the heat exchange efficiency and the energy-efficiency ratio can not be improved and the cost simultaneously can not be reduced, and the minimization is not beneficial. According to the technical scheme, the evaporator is in a two-folding three-section structure, and is divided into an evaporator A, an evaporator B and an evaporator C; the evaporator A and the evaporator B are respectively in a double-row structure; the evaporator C is in a single-row structure; the evaporator A is connected with the evaporator B; the evaporator C is connected with the evaporator B; and the evaporator C is located at the lower part of the evaporator B. The evaporator provided by the invention adopts a single-row and double-row combined manner, so that that the ultrathin design can be realized; the entire wind resistance of the evaporator can be reduced; the requirement on small space size can be met; and the structure is relatively compact.

The invention discloses an airflow circulation structure and a dehumidifier. The airflow circulation structure comprises a shell, a heating device and an air supply component, wherein the heating device and the air supply component are arranged in the shell. The air supply component comprises a cover and a driving device, wherein the cover and the driving device are spliced with the shell to forman air cavity; the shell comprises an air outlet plate; the air outlet plate comprises an air outlet; the cover comprises an air suction hole; the air cavity comprises an air suction cavity and an airoutlet cavity; the inner space of the air cavity is diffused from the air suction cavity to the air outlet cavity; and the driving device comprises a motor and fan blades. The airflow circulation structure further comprises a controller and a temperature sensor. Compared with the prior art, the airflow circulation structure can improve the air inlet temperature of the dehumidifier and alleviate the frosting problem of the dehumidifier; and meanwhile, the temperature of a heating structure can be reduced, and the heat dissipation performance of the dehumidifier can be improved.

The invention belongs to the technical field of air conditioners, and aims to solve the problem that the self-cleaning control mode of an existing air conditioner is generally slow in frosting speed,so that the whole self-cleaning time is long, and the normal experience of a user is influenced. In order to solve the problem, the invention provides a self-cleaning control method for an air conditioner. The air conditioner comprises a refrigerant circulation system and a solution circulation system composed of an indoor solution film, an outdoor solution film, a liquid pump and a liquid storagetank; the self-cleaning control method comprises the following steps that under the heating working condition, frequency reducing is carried out on a compressor, a four-way valve is reversed, frequency ascending is carried out on the compressor, an indoor fan of the air conditioner is closed, and the rotating speed of the liquid pump is improved, so that an indoor heat exchanger is frosted; afterthe indoor heat exchanger is frosted, an electronic expansion valve is closed firstly, and then an electromagnetic valve at the low pressure side of the compressor is closed after a preset time; andthe indoor heat exchanger is heated, so that the indoor heat exchanger is subjected to defrosting cleaning. According to the self-cleaning control method for the air conditioner, the self-cleaning efficiency of the indoor heat exchanger can be improved, and the user experience can be improved.

The invention belongs to the technical field of air conditioners, aims to solve the problems that by means of a self-cleaning control mode of an existing air conditioner generally, the frosting speedis generally slow, so that the whole self-cleaning time is long, and the normal experience of a user is influenced, and provides a self-cleaning control method for an air conditioner. The air conditioner comprises a refrigerant circulation system and a solution circulation system which is composed of an indoor liquid film, an outdoor liquid film, a liquid pump and a liquid storage box. The self-cleaning control method comprises the steps that under a refrigeration working condition, frequency reducing is carried out on a compressor, and reversing is carried out on a four-way valve; the openingdegree of an electronic expansion valve is reduced, the rotating speed of an outdoor fan of the air conditioner is reduced, and the rotating speed of the liquid pump is improved, so that an outdoor heat exchanger is frosted; after the outdoor heat exchanger is frosted, the electronic expansion valve is closed, and then a solenoid valve at the low-pressure side of the compressor is closed after preset time; and the outdoor heat exchanger is heated, so that the outdoor heat exchanger is defrosted and cleaned. The method can improve the self-cleaning efficiency of the outdoor heat exchanger andimprove the user experience.