69results about How to "Easy to defrost" patented technology

The invention discloses a defrosting method and a defrosting system for an air conditioner. The defrosting method comprises the following steps of: 10, electrifying the air conditioner for running and heating; 20, judging, namely (A) judging whether the outdoor environmental temperature is smaller than and equal to first preset temperature, (B) judging whether continuous running time of a heating compressor reaches first preset time, and judging whether accumulative running time reaches second preset time, (C) judging whether the continuous running time of the heating compressor reaches third preset time, and making accumulative running time reach fourth preset time, (D) judging whether the temperature of a defrosting sensor Te or Tc is smaller tan and equal to second preset temperature, keeping the temperature for fifth preset time, and making the accumulative running time reach fifth preset time, and (E) judging whether to defrost manually; and 30, determine to perform timing defrost, automatically defrost, manually defrost or not defrost according to a judging result obtained in the step 20. By the scheme, the problems that when the air conditioner is used for heating, a heating effect is influenced due to a relatively long defrosting period, and the air conditioner cannot defrost, or defrosts after a long time because the environmental temperature is relatively low can be solved.

A heat recovery ventilator defrost system utilizing a bypass section which supplies warm air in both channels of the heat exchanger to accelerate defrost, continue some ventilation of stale warm air, and recirculate a portion of the stale air flow, so as to warm incoming cold fresh air. When the system is in defrost mode, warm exhaust air to be expelled enters an exhaust inlet port and into an exhaust plenum. Because the air being exhausted (by way of the exhaust fan) through the exhaust plenum is under a positive pressure, the stale air will still be sucked out through exhaust passageway into discharge plenum, but also through the passive non-motorized bypass section into inlet plenum. Further, because fresh air continues to be drawn into inlet plenum, due to the positive pressure, the warm stale air which has passed through the bypass section (flap) into inlet plenum is then drawn through the heat exchanger along the inlet passageway into supply plenum, and out through supply port into the enclosure or dwelling. In this way, the heat recovery ventilators defrost system of the present invention supplies warm air in both channels of the heat exchanger.

Disclosed herein are a refrigerator and a defrost control method thereof that are capable of sensing an amount of frost formed on an evaporator based on a change amount of absolute humidity in the refrigerator to control a defrost operation. A defrost control method of a refrigerator including a storage chamber and an evaporator to cool the storage chamber, includes sensing absolute humidity in the storage chamber, determining an estimated amount of frost formed on the evaporator using time segments in which the absolute humidity in the storage chamber decreases, and controlling a defrost operation based on the estimated amount of frost. According to the present embodiments, it is possible to perform the defrost operation at the point of time for optimum defrost, thereby maximizing energy efficiency and cooling efficiency.

The invention discloses a frost prevention coating. The frost prevention coating is composed of a component A and a component B. The mass ratio of the component A and the component B is (4-8):1. The component A comprises, by mass, 20%-80% of fluorosilicon resin containing hydroxyl, 1%-50% of nano particles and / or titanium dioxide, 0.1%-20% of dispersing agents, 0.1%-1% of antifoaming agents, 0.1%-1% of rheological additives, 0.1%-2% of flatting agents, 0.1%-3% light stabilizer, 0.1%-1% of dryer and 20%-80% of solvent A. The component B comprises, by mass, 20%-80% of polyisocyanates curing agents and 20%-80% of solvent B. The frost prevention coating is simple in preparation process, wide in application range and excellent in hydrophobicity and frost protection performance, raw materials are easy to obtain, frosting and freezing of the cold surface can be relieved effectively, normal use efficiency of a device is improved beneficially, and defrosting is more easily achieved.

The horizontal freezer with defrost function includes one cabinet, and compressor, condensator, drying filter, capillary and evaporator connected successively through pipeline in the cabinet. In the pipeline, there is one valve, manual or electric, to short circuiting the condensator, and the valve is connected between the compressor and the condensator and has one end connected through pipe to the evaporator. Normally, the valve is shut off to reach refrigerating aim; and during defrost, the valve is opened to short circuit the condensator and the high temperature compressed refrigerant the compressor exhausts can enter directly to the evaporator for defrosting. The present invention has fast defrosting, and is safe, energy saving, simple and easy in maintenance.

The invention discloses a frost-free refrigerating system for a cold storage warehouse, which can remove frost in time in the use process to save energy, ensure uniform temperature field in the warehouse and achieve convenient use. The frost-free refrigerating system comprises an evaporator consisting of a plurality of groups of fin heat exchangers arranged at intervals and connected with each other in parallel, a water receiving tray arranged below each group of the fin heat exchangers, a telescopic water baffle connected with the water receiving tray and capable of wrapping the lower part of the fin heat exchanger when unfolded, a telescopic drive mechanism connected with the telescopic water baffle, a refrigerating system controller connected with the telescopic drive mechanism, and a water outlet on the lower end of the water receiving tray. The plurality of groups of fin heat exchangers can be operated flexibly by dividing into the plurality of groups, thus ensuring uniform temperature field in the warehouse. The refrigerating system is very convenient in processing the thawed frost water, and has the advantages of simple and convenient defrost operation, timely defrosting, improved refrigeration efficiency and energy saving.

The invention relates to a parallel circulation system with hot gas defrosting and cooling capacity recovery for a two-temperature refrigerator. A compressor outlet is divided into two ways connectedwith a condenser inlet and a three-way valve inlet; a condenser, a drying filter and a three-way valve are connected sequentially; two outlets of the three-way valve are connected with a refrigeratingchamber capillary inlet and a freezing chamber capillary inlet; a refrigerating chamber capillary outlet is connected with a refrigerating chamber evaporator inlet; a refrigerating chamber evaporatoroutlet is connected with a pipeline of a three-way valve outlet so as to be connected with a compressor inlet; a freezing chamber capillary is provided with two paths of outlets; one path is connected with a freezing chamber evaporator inlet and a one-way valve inlet; a one-way valve outlet is connected with a pipeline between the three-way valve outlet and the refrigerating chamber capillary inlet; the other path is connected with the freezing chamber evaporator inlet; a freezing chamber evaporator outlet is connected with one connector of the three-way valve; and the other connector of thethree-way valve is connected with the refrigerating chamber evaporator outlet so as to be connected with a compressor air suction port. According to the parallel circulation system with hot gas defrosting and cooling capacity recovery for the two-temperature refrigerator provided by the invention, the defrosting efficiency of a freezing chamber is improved, and meanwhile, a cooling performance thefreezing energy efficiency of a cooling system are further improved remarkably.

The invention discloses an energy-saving type air cooler and aims at providing an air cooler which can prevent defrost heat from entering cold environment, ensure the evenness of temperature field of a refrigerator, avoid the influence of the frost thawing on the quality of goods in the refrigerator and meet the storage requirement of the refrigerator. Two ends of an air channel are provided with an air inlet and an air outlet respectively; the air inlet is provided with an air inlet wind baffle for sealing the air inlet after being closed; the air outlet is provided with an air outlet wind baffle for sealing the air outlet after being closed; the inside of the air channel is provided with a heat exchanger; and a draught fan is arranged between the heat exchanger and the air outlet. In the energy-saving type air cooler, the air outlet of the air cooler is provided with the wind baffle which prevents the heat dissipation during the defrosting. The air inlet is provided with the wind baffle; during the defrosting, the wind baffle can avoid the influence of the frost thawing on the quality of the goods in the refrigerator, does not pollute the goods in the refrigerator and does not generate large fluctuation on the temperature of the refrigerator so as to ensure convenient, rapid, safe and reliable frost thawing and meet the storage requirement of the refrigerator.

The invention provides a refrigeration cycling device which processes a condensation effect in a condensation heat exchanger and at the same time is in favor of removing frost of an air heat exchanger. The refrigeration cycling device is provided with a compressor (1), the condensation heat exchanger (2), an expansion valve (3), and an evaporating heat exchanger (4). The evaporating heat exchanger (4) is provided with the air heat exchanger (41) and a heat source heat exchanger (42). An exhaust port (1o) connected with the compressor (1) and a bye-pass (71) and a bypass valve (72) of the air heat exchanger (41) are arranged. When implementing a defrosting mode, a control unit (6) makes refrigerant flow to the heat source heat exchanger (42), and at the same time arranges the flow rate that the refrigerant is supplied to the air heat exchanger (41) as 0 or reduces the flow rate, and makes the bypass valve (72) and supplies the refrigerant with high temperature and pressure from the compressor (1) to the air heat exchanger (41) via the bypass valve (72) and the bye-pass (71).

A radiant floor heating fan coil refrigerated wind source heat pump device comprises a compressor, wherein the compressor is connected with a tee joint and a heat exchanger through a four-way valve, and a one-way valve, a capillary tube, a filter and a liquid storage tank are further installed on a connecting pipe for connecting the heat exchanger and the tee joint in sequence. One outlet of the tee joint is connected with an indoor fan coil, the other outlet of the tee joint is connected with an indoor buried pipe, and the compressor, the fan, the four-way valve, the indoor fan coil and an indoor control panel are connected with a host power supply and a control panel. The radiant floor heating fan coil refrigerated wind source heat pump device is low in input power, large in heating capacity, high in energy efficiency ratio, low in noise and convenient to install, the heating effect meets the physiological needs of a human body, and the heating energy is saved by about 60%. The device is convenient, quick, safe and stable during refrigeration and has high promotional value.

The invention provides a multi-fan air conditioner defrosting method and an air conditioner. The air conditioner defrosting method is used for a multi-fan air conditioner, and comprises the steps of acquiring a current indoor ambient temperature; calculating the difference value Delta T between the current indoor ambient temperature and a user preset ambient temperature; comparing the Delta T witha preset temperature difference value Delta T0 under a hot air defrosting condition to determine whether a hot air defrosting condition is satisfied or not; and if the hot air defrosting condition issatisfied, at the time, reducing the air outlet amount per unit time of an upper air outlet and a lower air outlet, and making the air outlet amount per unit time of the upper air outlet less than the air outlet amount per unit time of the lower air outlet to enter a defrosting mode. According to the multi-fan air conditioner defrosting method and the air conditioner, the problems of great indoorambient temperature fluctuation and poor body sense of user caused during defrosting process of the air conditioner are solved.

The present invention provides a heat accumulating type air conditioning plant and a control method thereof. The heat accumulating type air conditioning plant is able to be driven through double heat sources and double loads of a heat storage tank. The heat accumulating type air conditioning plant comprises a compressor, an outer heat exchanger, an indoor heat exchanger and a heat storage tank, and also comprises a first valve device and a second valve device which are used for switching the flow direction of refrigerating fluid compressed in the compressor; a first branch part arranged at the outlet of the compressor and configured to perform branching the refrigerating fluid compressed in the compressor to the first valve and the second valve or the heat storage tank; a first storage tank connection pipe configured to extend from the first branch part to the heat storage tank, a condenser pipe configured to extend from the outer heat exchanger to the indoor heat exchanger, and a second storage tank connection pipe configured to extend from the heat storage tank to the condenser pipe.

A defrosting and cleaning device for an automobile rear view mirror comprises a lens holder and a lens disposed inside the lens holder. Three water spray holes are formed in the boundary between the place above the lens and a frame, the water spray holes are located in front of a connecting pipe inside a rearview mirror body, and the tail end of the pipe passes through a connecting support of therearview mirror and an automobile to be connected to a cleaning liquid storage tank installed inside the automobile. The cleaning liquid storage tank is provided with a built-in low-power electric heating wire in series connection with a temperature-controlled switch that is off at 60 DEG C and powered by a flexible solar thin film panel on a console. Two air outlets are formed in the boundary ofthe place above the lens and the frame, and the tail end of each air outlet passes through the connecting support of the rearview mirror and the automobile to be connected with an air outlet of an automobile air conditioner fan. The device can defrost the rearview mirror by heating the cleaning liquid, and can clean and dry the rearview mirror. The device has the advantage of being good in defrosting effect, environmentally friendly, compact in structure, simple and practical, thereby facilitating the travel.

Liquefied hydrocarbon gas carried by a tanker (78) is transferred to an import terminal (10) where the liquefied gas is heated to vaporize it and to heat the cold gas to at least −30° C. but preferably about 0° C., with the warmed gas transferred to a gas receiving facility (20, 83). Vaporizing and heating is accomplished by using a large number (more than 10) of vertically mounted air vaporizers (84) of a known type, which use environmental air that flows down the exterior of the finned tubes in which the liquefied or cold gas flows. In the present invention a large number of individual vaporizers are positioned in close proximity to each other, i.e. within a distance that is smaller than half the vertical height of the vaporizer tubes. Their close proximity allows many units to be installed on a small plot space, and also affects their thermal performance.

A heat exchanger (10) and a method and apparatus for manufacturing the same are provided. The heat exchanger (10) includes a refrigerant tube (100) through which a refrigerant flows, a heat-exchange fin (110) into which the refrigerant tube (100) is inserted, a plurality of tube treatment parts (130, 135, 138) laminated on a surface of the refrigerant tube (100), and a plurality of fin treatment parts (140, 145, 148) laminated on a surface of the heat-exchange fin (110).

Provided are a refrigerator frost collection plate and a defrosting prompt system and a control method of the refrigerator frost collection plate. The frost collection plate comprises a frost collection plate body and a clear frost plate fixed to the frost collection plate body in a spliced mode. The refrigerator frost collection plate body is tightly fixed to the upper surface of a top evaporator, the clear frost plate is located on the front side of the top evaporator, and the frost collection plate body is located on the rear side of the top evaporator. The system comprises the refrigerator frost collection plate, an evaporator temperature sensor, a freezing chamber compartment temperature sensor, a defrosting indicator light and a controller, wherein the evaporator temperature sensor is fixed to the bottom of the top evaporator, the freezing chamber compartment temperature sensor is arranged in the middle of a freezing chamber, the defrosting indicator light is fixed to the front of a refrigerator, the controller is connected with the evaporator temperature sensor, the freezing chamber compartment temperature sensor and the defrosting indicator light, and the controller is also connected with a compressor. Water vapor of the freezing chamber is guided by the frost collection plate to gather and frost at a specific position, and the surface of the evaporator is slightly frosted or is frostless; when defrosting conditions are reached, the defrosting indicator light sends out a defrosting prompt to remind people of defrosting; defrosting is convenient and fast, a power failure does not occur during defrosting, and time and labor are saved.

The invention discloses a refrigerator. The refrigerator comprises a refrigerator body, a refrigeration evaporator, a first freezing evaporator, a second freezing evaporator and a magnetic valve, wherein the refrigerator body comprises a casing, a refrigeration box inner container and a freezing box inner container, and the refrigeration box inner container and the freezing box inner container are arranged in the casing. The refrigeration evaporator is arranged on a lateral wall of the refrigeration box inner container. The first freezing evaporator is arranged on a lateral wall of the freezing box inner container and communicated with the refrigeration evaporator. The second freezing evaporator is arranged on the lateral wall of the freezing box inner container. The magnetic valve is connected with the refrigeration evaporator and the second freezing evaporator to control a refrigerant to enter the refrigeration evaporator and the second freezing evaporator. When the refrigerator refrigerates, the first freezing evaporator and the second freezing evaporator work alternatively, temperature difference in a freezing chamber is small, frosting is not easily produced in the freezing chamber, and frost layers in the freezing chamber are distributed on four lateral walls of the freezing box inner container in frosting, so that frost are convenient to remove, and energy consumption can be reduced.

The invention discloses a defrosting system of an air-source heat pump. The defrosting system comprises an outdoor unit, an indoor unit, a phase-change energy accumulator, a compressor, a four-way valve and a throttling element, wherein a port A of the four-way valve is communicated with the indoor unit through a pipeline provided with a first electromagnetic valve, and is communicated with the phase-change energy accumulator through a pipeline provided with a second electromagnetic valve; a port B of the four-way valve is communicated with an air suction opening of the compressor through a pipeline; a port C of the four-way valve is communicated with the outdoor unit through a pipeline; a port D of the four-way valve is communicated with an air exhaust opening of the compressor through apipeline; the indoor unit and the phase-change energy accumulator are communicated with the throttling element respectively through pipelines which are provided with a check valve and a third electromagnetic valve; the throttling element is communicated with the outdoor unit through a pipeline; an inlet of the check valve is communicated with the indoor unit; an outlet of the check valve is communicated with the throttling element. The defrosting system of the air-source heat pump has a simple structure, and residual heat of a heating cycle can be effectively utilized to carry out defrosting.

The invention relates to a multiple-refrigerating system used for a refrigerator and belongs to the technical field of refrigerators. The multiple-refrigerating system used for the refrigerator comprises a compressor, a condenser, a first freezing evaporator, a refrigeration evaporator, a variable temperature evaporator and a power-driven changeover valve. An outlet of the condenser is connected with an inlet of the power-driven changeover valve. The multiple-refrigerating system used for the refrigerator further comprises a second freezing evaporator. An outlet of the power-driven changeover valve is connected with an outlet of the refrigeration evaporator through a refrigeration capillary tube, connected with an outlet of the variable temperature evaporator through a variable temperature capillary tube and connected with an outlet of the second freezing evaporator through a freezing capillary tube. An outlet of the refrigeration evaporator and an outlet of the variable temperature evaporator are connected with an inlet of the first freezing evaporator. An outlet of the first freezing evaporator and an outlet of the second freezing evaporator are connected with an inlet of the compressor. The first freezing evaporator and the second freezing evaporator are both arranged between a thermal insulation layer and a freezing chamber liner of an existing refrigerator. The multiple-refrigerating system used for the refrigerator is low in startup rate and short in working time.

The invention discloses an automobile remote deicing system and method, an automobile and a storage medium. The automobile comprises an automobile gateway, an automobile body controller, a temperature sensor, a vehicle-mounted air conditioner, a camera, an image processor, a heating module and a CAN bus. The automobile gateway, the automobile body controller, the temperature sensor, the vehicle-mounted air conditioner and the heating module are all connected to the CAN bus, and the camera is connected with the CAN bus through the image processor; the heating module is used for heating a rearview mirror or a rear windshield of the automobile; the automobile remote deicing system further comprises a home gateway and an intelligent door lock; and the home gateway is in communication connection with the automobile gateway, and the intelligent door lock is connected with the home gateway. According to the system, a user can conveniently and remotely defrost and deice glass and rearview mirrors of the automobile in advance, the waiting time needed when the automobile is used in cold weather is shortened, and the use efficiency and safety of the automobile are improved. The system and method can be widely applied to the technical field of automobiles.

The invention provides an air conditioner defrosting and dust removing method and an air conditioner defrosting method and relates to the technical field of air conditioners. The technical problems that an air conditioner in the prior art adopts a defrosting mode to perform defrosting on a condenser, the indoor comfort is lowered easily, and user experience is affected are solved. The air conditioner defrosting and dust removing method includes the following steps that the dust accumulating and frosting condition of an air conditioner heat exchanger is judged; and a defrosting device on the air conditioner heat exchanger is started to perform defrosting on the heat exchanger or a dust removing device is started to perform dust removing on the air conditioner heat exchanger. The air conditioner defrosting and dust removing method is used for defrosting and dust removing treatment of the air conditioner heat exchanger.

The invention discloses a heat exchanger used for a refrigerator and a manufacturing method of the heat exchanger. The heat exchanger used for the refrigerator comprises a heat exchange tube and a plurality of fins, wherein the fins are arranged on the heat exchange tube at intervals; each fin is provided with a mounting part and a plurality of fan-shaped blades; the fan-shaped blades are connected with the mounting part and are arranged at intervals along the circumferential direction of the mounting part; the mounting part is provided with an axial mounting hole; the heat exchange tube passes through the axial mounting hole and is matched inside the axial mounting hole so that the fins are arranged on the heat exchange tube. The heat exchanger used for the refrigerator according to the embodiment of the invention has the advantages of being high in heat exchange efficiency, small in frost quantity, easy to defrost, and the like.

The invention provides an air source heat pump defrosting and deashing device and method based on shock wave and heat pipe technologies. A heat pipe set is arranged in an outdoor heat pipe heat exchanger, an inductor and an air shock wave generator are arranged on the outdoor heat pipe heat exchanger, and the air shock wave generator and the inductor are connected with a controller through USB cables correspondingly. A steam channel is arranged in a heat pipe of the heat pipe set, a liquid absorbing pipe core is arranged on the inner side of a pipe wall, and a fixed support and heat exchanging fins are arranged outside the pipe wall; one end of the heat pipe set communicates into a combined collection pipe, and an intermediate bulkhead or a baffle plate is arranged on the heat pipe set. The method comprises the following steps that (1), parameters are set; (2), a cooling mode is conducted; and (3), a heating mode is conducted. According to the air source heat pump defrosting and deashing device and method based on the shock wave and heat pipe technologies, traditional chemical modes of manual cleansing and defrosting through heating are replaced with a shock wave mode, pollution cannot be generated on a water source and air, and the phenomena that the indoor temperature is lowered, or heating is stopped, and electric energy is wasted caused by defrosting, so that operating efficiency of a heat pump is lowered are avoided; and operational cost is low, the service life is long, operation is easy, control, overhaul and maintenance are convenient, and safety and reliability are achieved.

This invention to air source heat pump outdoor exchanger frozen slow-down method and its air source heat pump, which belongs to air condition technique field. The method is to cool down the air before it enters the outdoor heat exchanger. The air source heat pump comprises outdoor exchanger and the cooling and drying device in series connection with the exchanger. The drying device and the exchanger both adopt fin pipe exchanger, wherein the cooling and drying device both are set with disc pipe with heat conductive wires.

The invention discloses a defrosting method and a defrosting system for an air conditioner. The defrosting method comprises the following steps of: 10, electrifying the air conditioner for running and heating; 20, judging, namely (A) judging whether the outdoor environmental temperature is smaller than and equal to first preset temperature, (B) judging whether continuous running time of a heating compressor reaches first preset time, and judging whether accumulative running time reaches second preset time, (C) judging whether the continuous running time of the heating compressor reaches third preset time, and making accumulative running time reach fourth preset time, (D) judging whether the temperature of a defrosting sensor Te or Tc is smaller tan and equal to second preset temperature, keeping the temperature for fifth preset time, and making the accumulative running time reach fifth preset time, and (E) judging whether to defrost manually; and 30, determine to perform timing defrost, automatically defrost, manually defrost or not defrost according to a judging result obtained in the step 20. By the scheme, the problems that when the air conditioner is used for heating, a heating effect is influenced due to a relatively long defrosting period, and the air conditioner cannot defrost, or defrosts after a long time because the environmental temperature is relatively low can be solved.

The invention discloses an anti-freezing defrosting device for a vertical air conditioner. The anti-freezing defrosting device comprises a cabinet installed indoors and a box body installed outdoors,the middle part of the cabinet is provided with a support plate, each side of the support plate is fixedly connected to the inner side wall of the cabinet, the lower end of the support plate is provided with an air blowing mechanism, the bottom ends of the two sides of the cabinet are provided with circular grooves, the ends, getting close to each other, of the two circular grooves are provided with vent holes, the insides of the two circular grooves are slidably connected with rings, and louvers are fixedly mounted in the middle portions of the two rings. The anti-freezing defrosting device has the advantages that defrosting is convenient and quick; the box body is closed through a moving heat insulation layer, so that heat generated by an electric heating plate is retained, the temperature in the box body is rapidly increased, and the effect of rapid defrosting is achieved; and cold air does not need to be exchanged into a room, a user can replace a filter screen quickly and easily,and the icing problem caused by unsmooth air circulation caused by blockage of the filter screen is avoided.

The invention discloses an evaporator assembly for a refrigerator. The evaporator assembly comprises an evaporator and a metal plate. The evaporator is arranged in a chamber of the refrigerator to be used for refrigerating the chamber. The metal plate is attached to the surface of the evaporator detachably. According to the evaporator assembly for the refrigerator, the metal plate is arranged on the surface of the evaporator, so that the problem of difficult and inconvenient defrosting of evaporators in the prior art is solved, and the evaporator assembly is simple in structure, easy to mount and low in energy consumption.

The invention relates to the technical field of air conditioners, and particularly provides an air conditioner, a defrosting control method thereof, a storage medium and a control device. The air conditioner comprises an outdoor heat exchanger. The control method comprises the steps that the air conditioner enters a reverse circulation defrosting mode; and on the premise of ensuring that the reverse circulation defrosting mode is always established, the path of refrigerant flowing through the outdoor heat exchanger is adjusted so that at least one part of the outdoor heat exchanger can be defrosted better relative to other parts. Through the arrangement mode, when the air conditioner is defrosted, on the premise that reverse circulation defrosting is reserved, a frost layer of the outdoor heat exchanger can be better removed; for example, on the premise of dividing the local importance of the outdoor heat exchanger, a better defrosting mechanism is configured for the local part with high importance or the highest importance; and for example, the refrigerant can flow through the local part for multiple times or the refrigerant with better heat carrying capacity can flow through the local part and the like.

A simple defrosting device for a refrigerator includes a first ice shovel and a second ice shovel. The inner side face of the first ice shovel and the inner side face of the second ice shovel are in close contact with each other, the rear end of the first ice shovel is provided with a grab handle, the grab handle is internally provided with a sliding slot, the second ice shovel is in sliding connection with the sliding interior of the sliding slot in the extension direction of the first ice shovel, and the rear end of the grab handle is provided with a forward pushing device for pushing the second ice shovel forwards. Physical defrosting is achieved by the cooperation of the first ice shovel and the second ice shovel without refrigerator defrosting or defrosting by heating the object.

The invention discloses a frosting detection device and method of a heat exchanger and an air conditioning system. The frosting detection device comprises a light source, a color collecting unit and acontrol unit, wherein the light source is used for emitting white light and irradiating the light on the surface of the heat exchanger; the color collecting unit is used for collecting the light reflected from the surface of the heat exchanger, and obtaining the color of the surface of the heat exchanger according to the reflected light; and the control unit is connected to the color collecting unit, the control unit is used for judging whether the heat exchanger is frosted or not according to the color of the surface of the heat exchanger, and a frosting signal is output when the heat exchanger is frosted. According to the frosting detection device, whether the heat exchanger is frosted or not can be accurately judged so that the heat exchanger can be conveniently defrosted, the air conditioning system can run stably, and energy sources are saved.