69results about How to "Effective defrosting" patented technology

The invention discloses an air conditioner. The air conditioner comprises an outdoor unit, an indoor unit, a four-way valve and a compressor which are connected through connecting pipes, and further comprises a first temperature sensor, a second temperature sensor and a controller. The first temperature sensor is arranged on the air inlet side of a heat exchanger of the outdoor unit. The second temperature sensor is arranged on the air outlet side of the heat exchanger of the outdoor unit. The input end of the controller is electrically connected with the first temperature sensor and the second temperature sensor. The output end of the controller is electrically connected with the four-way valve. When the time spent by the air conditioner on heating circulation is longer than a preset first time threshold value and the time duration during which the temperature difference between the air inlet temperature and the air outlet temperature is smaller than or equal to a preset temperature threshold value is larger than a second preset time threshold value, the controller controls valve openings of the four-way valve to be switched, and the air conditioner is switched into defrosting circulation from heating circulation. The invention further discloses a defrosting control method of the air conditioner. By means of the air conditioner and the defrosting control method of the air conditioner, defrosting can be effectively conducted in time, and the situation that defrosting is conducted when no frost exists is avoided.

The invention provides a defrosting control method and device of a refrigerator, computer equipment and a storage medium. By acquiring the running time of a compressor, the running time of the refrigerator is acquired; the door opening accumulated time number of the refrigerator and the door opening accumulated time of the refrigerator are acquired; the environment temperature of the refrigeratoris acquired; according to the environment temperature, a target defrosting mode is determined, and different defrosting modes correspond to different defrosting starting preset condition combinations;and when the running state, formed by at least one data of the running time of the compressor, the running time of the refrigerator, the door opening accumulated time number of the refrigerator and the door opening accumulated time of the refrigerator, of the refrigerator is consistent with any defrosting starting preset condition in the defrosting starting preset condition combination corresponding to the target defrosting mode, defrosting is started for the refrigerator. By monitoring the real-time running state of the refrigerator, the accurate time for starting defrosting on the refrigerator is determined according to the running state of the refrigerator.

A defrosting method for a heat pump comprises following steps: 1, arranging more than one temperature sensor for detecting the temperature of an evaporator on the evaporator of the heat pump; 2, defrosting the heat pump for the first time by a timing defrosting method during running, and carrying out defrosting after the detected temperature of the evaporator keeps lower than 0 DEG C for 40 minutes; and 3, determining a temperature maximum Tmax of the evaporator in a defrosting period, beginning to time after the first defrosting is finished, recording the temperature maximum Tmax of the evaporator after a first time interval T1, and recording the temperature maximum Tmax by a master control chip of the heat pump. On the basis of the traditional intelligent defrosting, and the step 3 is added to automatically judge a reference value which is the temperature maximum Tmax. The defrosting method for the heat pump has the advantages that operation is flexible, defrosting is effective, frostless defrosting can be avoided to the greatest extent, and an application range is wide.

The invention discloses a defrosting control method. The method is applied to the defrosting control device. The device comprises a compressor, wherein an electronic expansion valve is connected withthe compressor. The method comprises steps that after a defrosting mode is started, the exhaust temperature of the compressor is obtained, and the exhaust temperature is compared with the preset exhaust temperature; the opening degree of the electronic expansion valve is adjusted according to the exhaust temperature comparison result; after preset time, the exhaust pressure of the compressor is compared with the preset exhaust pressure, and the opening degree of the electronic expansion valve is adjusted according to the exhaust pressure comparison result. The invention further discloses a defrosting control device, an air conditioner and a readable storage medium. The method is advantaged in that the flow opening degree of the electronic expansion valve is dynamically adjusted based on exhaust parameters of the compressor so that the refrigerant circulation amount of the compressor is adjusted, defrosting can be effectively carried out, and the defrosting time is shortened.

Provided is a refrigerator equipped with a defrosting system with which defrosting can take place in a satisfactory manner while minimizing abnormal heat emission by the defrosting device, and without any loss of ease of use for the user, even in instances in which a large quantity of frost has become deposited on the evaporator. This refrigerator (1) has a basic defrost operation function by which driving of the defrosting device (13) is halted when it is determined that the continuous driving time of the defrosting device (13) has reached a predetermined first time (TM1), and when it is determined that the temperature of the evaporator (11) has reached a predetermined first temperature (TX); and a supplemental defrost operation function by which the necessity for a supplemental defrost operation is determined on the basis of the evaporator (11) temperature information detected when the first time (TM1) has been reached, and driving of the defrosting device (13) is resumed after a predetermined second time (TM2) following the halt has elapsed.

The invention relates to an air-conditioner and a defrosting method and a defrosting device thereof. The defrosting method comprises the steps that after starting of a compressor is completed, running time T1 of the compressor is recorded; when the time T1 is equal to preset time T, a suction pressure value or an evaporation pressure value is detected; when the suction pressure value or the evaporation pressure value is smaller than a preset pressure value, a running pressure specific value of the air-conditioner and continuous time T2 of the air-conditioner are detected; when the pressure specific value and/or the continuous time T2 and a preset pressure specific value meet the defrosting condition, the air-conditioner is controlled to carry out defrosting, thus, frequent defrosting can be avoided, the period of carrying out defrosting in a severe frosting environment can be shortened, intelligent defrosting can be achieved effectively, the good defrosting effect is achieved, a unit can be protected, and reliable running of the unit can be achieved.

The invention relates to the technical field of vehicle manufacturing, in particular to a defrosting device for vehicle glass. The defrosting device for vehicle glass comprises a vehicle-mounted powersource, a refrigerator, a cold water pump, a heating device, a hot water pump, an electromagnetic valve, a vapor generator, a decompression valve, an ejecting device and an operation platform. Waterpumped from the refrigerator by the cold water pump is heated by the heating device, is ejected from the ejecting device from the hot water pump after pressurization, ans is matched with a windshieldwiper for application to melt frost on the vehicle glass; or hot water heated by the heating device enter the vapor generator from the electromagnetic valve to produce water vapor, the water vapor isejected to the vehicle glass through the ejecting device from the decompression valve, and matched with the windshield wiper for application to melt frost on the vehicle glass. According to the defrosting device for the vehicle glass, the vehicle-mounted power source is adopted to apply heat water or produce vapor to the vehicle glass by ejecting to melt frost on the vehicle glass, defrosting is quick and effective, and driving by persons in winter mornings is facilitated.

The embodiment of the invention provides a heat pump air conditioning system which comprises a heat exchanger, a first sensor, a second sensor and an air conditioning controller. The first sensor is arranged on the upstream side, relatively close to the refrigerant flowing direction of the heat exchanger, of a first gas-liquid boundary; the second sensor is arranged on the other side, relatively close to an outlet, of the first gas-liquid boundary and located at the corresponding position of a gas-liquid boundary, namely the second gas-liquid boundary corresponding to a preset bearable heat exchanger frost extreme position; and the air conditioning controller determines whether the frosting area of the heat exchanger reaches the preset frosting extreme position or not according to the signals sent from the first sensor and the second sensor, and makes the heat pump air conditioning system to conduct deforesting treatment if it is judged that the frosting area of the heat exchanger reaches the preset frosting extreme position. In addition, the invention further discloses the heat exchanger of the heat pump air conditioning system and a control method of the heat pump air conditioning system. According to the heat pump air conditioning system, the heat exchanger and the control method of the heat pump air conditioning system, defrosting treatment can be effectively started through monitoring on frosting conditions of the heat pump air conditioning system.

The invention relates to a refrigeration heat-pump circulatory system which at least comprises a compressor, an indoor heat exchanger, a throttling part, an outdoor heat exchanger and a cold and hot four-way reversing valve, wherein, a cooling medium inlet and a cooling medium outlet of the compressor are connected with two interfaces of the cold and hot four-way reversing valve; a third interface of the cold and hot four-way reversing valve is connected with one end of the indoor heat exchanger, the other end of the indoor heat exchanger is connected with the throttling part which is connected with the outdoor heat exchanger by a second out-way reversing valve; the cooling medium inlet and the cooling medium outlet of the outdoor heat exchanger are connected with two interfaces of a second four-way reversing valve; a third interface of the second four-way reversing valve is connected with the throttling part; a fourth interface of the second four-way reversing valve is connected with a fourth interface of the cold and hot four-way reversing valve. In the refrigeration heat-pump circulation system of the invention, when the cooling medium inlet of the outdoor heat exchanger is defrosted to a certain phase, reversing is carried out by the second four-way reversing valve to the cooling medium inlet and the cooling medium outlet of the outdoor heat exchanger to quicken the original defrosting speed at the cooling medium outlet of the outdoor heat exchange, thus ensuring that the defrosting can be finished effectively at both the cooling medium inlet and the cooling medium outlet of the outdoor heat exchanger and leading the defrosting to be more even and faster.

Ice making system and method for a refrigerator is disclosed. The ice making system includes an ice making unit that makes ice cubes; a cold air generator unit that cools air inside a cooling duct so as to produce cold air, a cold air circulation unit that supplies the cold air from the cold air generator to the ice making unit and discharges the cold air from the ice making unit to the cold air generator, and a drainage unit that drains defrost water produced from the cooling duct to an outside.

The invention discloses a high-efficiency safety window glass defrosting device, which comprises a guide wheel, a heater, a casing, a battery, a heating box, an air intake pipe, an air pump, a pressurizing device, an air pipe, a hand-held device, a small motor, a rotating disk, a cleaning block and brush, the shell is provided with a battery, the shell is provided with a heating box, the heating box is provided with a heater, the bottom of the heating box is provided with an air pipe, the other end of the air pipe is provided with a hand-held device, and the hand-held device is equipped with a There is a small motor, the output shaft of the small motor is connected with the rotating shaft, an impeller is arranged on the rotating shaft, a rotating disk is arranged at the bottom of the rotating shaft, multiple groups of brushes are evenly arranged on the rotating disk, and a cleaning block and a defrosting knife are arranged at the bottom of the handheld device. The invention avoids the loss of heat in the heating box, and at the same time preheats the cold air in the intake pipe, saves energy, avoids waste of resources, and is quick and effective in defrosting.

The invention discloses an oil gas defrosting system and method for a condensation method oil gas recovery device. The oil gas recovery device comprises an oil gas inlet and an oil gas outlet and further comprises a heat exchange module installed between the oil gas inlet and the oil gas outlet and used for condensing oil gas, and the defrosting system comprises a heat exchange branch A and a heatexchange branch B which are arranged in the heat exchange module and connected in parallel. The oil gas defrosting system further comprises an induced draft fan, a heat exchanger, a defrosting inletvalve A, a defrosting inlet valve B, a defrosting outlet valve A and a defrosting outlet valve B. By means of branch switching, frosting of the heat exchanger is avoided, and normal operation of the recovery device is guaranteed.

The invention provides a vending machine capable of efficiently performing snow melting and defrosting of a prescribed portion of an outer door or a vending machine body, and allowing suppression of power consumption. The vending machine has: the vending machine body 10 having an opened front face; the outer door 20 for opening/closing the front face of the vending machine; and a defrosting heater 14 for heating the front face opening edge of the vending machine body. The vending machine also has: a temperature detector 41 for detecting an outside air temperature; and a second control part 40 for starting the defrosting heater 14 when the temperature detected by the temperature sensor 41 becomes not more than a prescribed temperature.

The refrigerant circuit (20) is provided with low-stage compressors (101, 102, 121, 122), high-stage compressors (41, 42, 43), an outdoor heat exchanger (44), and a utilization-side heat exchanger ( 83, 93). During the defrosting operation of this refrigeration device (10), the high stage side compressors (41, 42, 43) are operated. The refrigerant discharged from the high-stage compressors (41, 42, 43) is introduced into the use-side heat exchangers (83, 93) to heat the frost from the inside. Thereafter, the refrigerant is evaporated in the outdoor heat exchanger (44), compressed in the high-stage compressors (41, 42, 43), and sent to the use-side heat exchangers (83, 93) again.

The invention relates to a system for heating and unfreezing a winter dump pit of a garbage incineration power plant. The system comprises a continuous blow-down flash tank, an intermittent blow-down flash tank, a blow-down cooling tank and the dump pit, wherein a continuous blow-down hole of a waste heat boiler is accessed to an inlet of the continuous blow-down flash tank; a dewatering hoe of the continuous blow-down flash tank and an intermittent blow-down hole of the waste heat boiler are connected to an inlet of the intermittent blow-down flash tank through a pipeline; an outlet drain of the intermittent blow-down flash tank is divided into three branch pipes through a tee joint, is separately connected to an inlet of the blow-down cooling tank and an unloading hall side of the dump pit, is connected to the blow-down cooling tank and the dump pit; and valves are arranged on all branch pipes. The system effectively heats and unfreezes introduced low-temperature garbage and improves the fermentation effect of the winter dump pit, so that a heat value of garbage in a furnace is increased, an auxiliary combustion system is avoided, and winter operation cost of the power plant is greatly reduced.

The invention relates to a defrosting mechanism of refrigeration equipment. The defrosting mechanism comprises a defrosting portion, a heat collecting portion, a liquid storing box, a connecting pipeand a circulating pump. The defrosting portion is arranged on an evaporator. The heat collecting portion is arranged on a compressor. The liquid storing box is connected with a circulating pump. The circulating pump conveys cooling liquid for the defrosting portion and the heat collecting portion through a connecting pipe. A pipeline switching valve is connected to the circulating pump. Accordingto the mechanism, heat generated in the normal working process of the compressor is utilized for heating the cooling liquid, and when the evaporator needs to be defrosted, the cooling liquid with theheat is introduced into the defrosting portion to carry out defrosting for the evaporator. In the defrosting process, the heat dissipating temperature of the cooling liquid is lowered, then when the refrigeration equipment works normally, the low-temperature cooling liquid can dissipate the heat for the compressor efficiently. Therefore, the evaporator is effectively defrosted, and the energy consumption is effectively reduced.

The invention discloses a domestic refrigerator freeze evaporator integrated assembly device and relates to the technical field of refrigerator equipment. The domestic refrigerator freeze evaporator integrated assembly device comprises a heater integrated assembly and a defrosting tray. The heater integrated assembly comprises a plastic shell terminal, fuses, a thermoplastic pipe and a heating pipe. Two ports of the heating pipe are connected with a power connection portion inside the plastic shell terminal, the heating pipe comprises an R-shaped heating pipe, a straight heating pipe and a curved heating pipe, a rectangular heating pipe formed by the R-shaped heating pipe and the straight heating pipe and the curved heating pipe arranged at one end are of an integrated structure, the two right-angle portions of the rectangular heating pipe are provided with the fuses, a freeze evaporator is installed inside the rectangular heating pipe, and side plates are arranged on the circumferential side of the curved heating pipe installed on the bottom face of the defrosting tray. The domestic refrigerator freeze evaporator integrated assembly device has an obvious heat transfer efficiency improving effect, the whole device can achieve intelligent defrosting and has a protection function for a system after assembling is completed, the product componentized supply capability is improved,and product assembling is easy.

A heating structure is provided. The heating structure, which is for heating a pump installed in a tank so as to discharge a liquid stored in the tank to the outside of the tank, comprises: a flange installed on one side of the interior of the tank; and a heating member coupled to one side of the flange and provided on one side thereof with an accommodation groove in which at least a part of the pump is accommodated, wherein a first discharge tube of the pump having at least a part thereof accommodated in the accommodation groove extends toward the flange and is connected to a second discharge tube formed on the other side of the flange outside the tank, and the heating member is formed to heat at least a part of the pump, the first discharge tube, and at least a part of the second discharge tube.

The invention provides an ultralow-temperature heat pump system used for heating and a control method thereof. The ultralow-temperature heat pump system comprises a first heat pump system and a second heat pump system connected with the first heat pump system in an overlapping mode. The first heat pump system is at a high-temperature grade, and comprises a first compressor (11), a condenser (12) and a first throttling device (13). The second heat pump system is at a low-temperature grade, and comprises a second compressor (21), a gas cooler (22), a high-pressure evaporator (23) and a second throttling device high-pressure evaporator (24). The first heat pump system and the second heat pump system are overlapped and combined together through an evaporative condenser (3). The first heat pump system absorbs heat through the evaporative condenser (3), and the second heat pump system exhausts heat through the evaporative condenser (3). By adoption of the ultralow-temperature heat pump system used for heating and the control method thereof, the defect that a heat pump heating system in the prior art is severe in performance degradation under a low-temperature environment, especially under an environment with the temperature being -25 DEG C or below can be overcome; the system is made to be stable in performance, degradation is not prone to occurring, and the energy efficiency of the system can be maintained at a high level all the time.