105results about How to "Improve defrosting speed" patented technology

The invention discloses a defrosting control method of an air conditioner. The control method comprises the following steps that environment temperature and the temperature of an outdoor heat exchanger outlet or the temperature of a super cooling section are obtained; whether the defrosting condition is met or not is judged according to the environment temperature and the temperature of the outdoor heat exchanger outlet or the temperature of the super cooling section; when the judgment result shows that the defrosting condition is met, the wind speed of an indoor fan is decelerated, an electronic expansion valve is controlled to be lowered to the first opening degree state, an outdoor fan is closed, a compressor is regulated to the defrosting frequency, after the preset time, and the first ascending speed is used for controlling the electronic expansion valve to be raised to the second opening degree state, wherein the opening degree value of the second opening degree state is greater than the opening value of the first opening degree state. The defrosting control method of the air conditioner has the advantages that the defrosting can be realized without stopping the compressor, the method is simple, and the reliability is high. The invention also provides the air conditioner.

The invention relates to the field of air conditioners, and discloses an air conditioner defrosting control device and a method. The air conditioner comprises an outdoor draft fan. The air conditioner defrosting control device comprises a controller for implementing the following steps: judging whether the air conditioner is in a defrosting phase; and controlling the outdoor draft fan to rotate reversely for exchanging the heat through convection if the air conditioner is in the defrosting phase. By the technical scheme, the defrosting speed of the outdoor heat exchanger is accelerated, accordingly increasing the using efficiency of the air conditioner, avoiding the uncomfortable feeling in the customer use, and increasing the defrosting degree, increasing the low temperature heating capacity, and thereby increasing the seasonal energy efficiency.

The invention provides a control method for a draught fan of a refrigerator compartment. The method comprises the following steps of: detecting a first temperature of a compartment, if the first temperature of the compartment is higher than a first predetermined temperature, refrigerating the compartment and detecting a door of the compartment whether the door is opened or not, if the door is closed, controlling the start of the draught fan; if the first temperature of the compartment is lower than a second predetermined temperature, stopping refrigeration and closing the draught fan, and detecting an evaporator of the compartment whether is defrosted or not, if the evaporator is defrosted, controlling the start of the draught fan and judging a setting temperature of the compartment whether the setting temperature is higher than a third predetermined temperature, if the setting temperature is higher than the third predetermined temperature, judging defrosting is ended or not, if the defrosting is ended, controlling the closing of the draught fan; if the setting temperature is lower than the third predetermined temperature, judging the defrosting time whether reaches scheduled time or not, if the defrosting time reaches the scheduled time, controlling the closing of the draught fan; wherein the second predetermined temperature is lower than the first predetermined temperature. In the embodiment disclosed by the method, when the evaporator is defrosted, the draught fan can be selectively started, therefore, humidity of the compartment can be effectively improved, a moisture preserving demand of the compartment can be met, and freshness retaining time of foods can be improved.

The invention discloses a heat pump system, which comprises a compressor, a four-way valve, a liquid-vapor separator, an indoor heat exchanger, an outdoor heat exchanger, a first throttling mechanism and a first bypass valve for selectively bypassing the first throttling mechanism. According to the heat pump system provided by the embodiment of the invention, the flow rate of a refrigerant in the system can be increased by opening the first bypass valve, the evaporating temperature of the refrigerant entering the outdoor heat exchanger is raised, and frost on the surface of the outdoor heat exchanger is slowly thawed without performing a defrosting reverse cycle. Since the refrigerant reverse cycle is not required during defrosting, the indoor heat exchanger can be used as a condenser to produce heat all the time, the temperature fluctuation of the indoor heat exchanger is reduced, and the operation efficiency of the system is also obviously improved. The defrosting can be performed when a small amount of frost is accumulated by the outdoor heat exchanger, so that the frost on the surface of the outdoor heat exchanger is discontinuously removed, thereby keeping stable operation of the system.

The invention provides an intelligent defrosting method of a variable frequency air conditioner. The intelligent defrosting method comprises the following steps that S1, the air conditioner is turnedon for heating; S2, whether a pre-defrosting condition of the air conditioner is met or not is judged, and if yes, a pre-defrosting stage is entered; S3, the air conditioner changes a preset temperature of heating to a preset pre-defrosting temperature, and heating is continued; S4, whether a defrosting condition of the air conditioner is met or not is judged, and if yes, a defrosting stage is entered; and S5, defrosting is carried out on the air conditioner, whether a defrosting end condition is met or not is judged, and if yes, the defrosting process is ended. According to the method, when the air conditioner is not frosted, or the frosting condition is light and not sufficient to start frosting, the pre-defrosting judgment is carried out firstly and then the pre-defrosting process is carried out, and the indoor temperature before defrosting is improved; and then defrosting is performed after the defrosting starting condition is met, the defrosting speed is increased, the time required for defrosting is shortened, the defrosting efficiency of the air conditioner is improved, and the indoor temperature is prevented from excessively falling, the fluctuation range of indoor temperature before and after defrosting is reduced, and the comfort degree of the user is improved.

The invention discloses a multifunctional freezing, fresh-keeping and unfreezing storehouse used for solving the problems that nutrients of food are seriously lost in the freezing and unfreezing processes and the quality of the food is low. The multifunctional freezing, fresh-keeping and unfreezing storehouse comprises a warehouse body and a freezing and unfreezing device installed in the warehouse body. A shelf where food is placed is arranged inside the warehouse body. The freezing and unfreezing device comprises a refrigerating device, a steam heating device and an electric field device, wherein the refrigerating device is used for generating cold air to reduce the temperature in the storehouse body, the steam heating device is used for increasing the temperature and humidity in the storehouse body, and the electric field device is used for generating an electric field so that the food on the shelf can be in an electric field environment. In the freezing process, the refrigerating device and the electric field device are started so that the food on the shelf can be in a low temperature and electric field environment to be cooled and frozen; in the unfreezing process, the steam heating device and the electric field device are started so that the food on the shelf can be in a high temperature and electric field environment to be heated, moisturized and unfrozen, wherein the electric field intensity set in the freezing process is higher than that set in the unfreezing process.

The invention relates to an air conditioner and a defrosting method thereof. The air conditioner comprises a compressor, an outdoor heat exchanger and an indoor heat exchanger, wherein the compressor, the outdoor heat exchanger and the indoor heat exchanger are communicated through a pipeline. The air conditioner further comprises a first four-way valve and a second four-way valve. The first four-way valve comprises a port a1, a port b1, a port c1 and a port d1. The second four-way valve comprises a port a2, a port b2, a port c2 and a port d2. An outlet of the compressor is communicated with the port a1 through a pipeline, and an inlet of the compressor is communicated with the port c1 through a pipeline. The two ends of the outdoor heat exchanger are communicated with the port b2 and the port d2 through pipelines respectively. The two ends of the indoor heat exchanger are comminuted with the port b1 and the port c2 through pipelines respectively. The port d1 and the port a2 are communicated through a pipeline. Through control over on-off of the two four-way valves, switching between a heating mode and a defrosting mode is achieved, so that the defrosting speed is increased, the defrosting effect is improved, and large fluctuation of the room temperature is avoided.

The invention provides a defrosting method of a variable-frequency air source heat pump unit. The defrosting method comprises the following steps that when a defrosting condition is reached, a compressor is reduced to the lowest frequency and kept for 5 seconds, a defrosting mode is started, the frequency of the compressor is increased to the defrosting frequency, the expansion opening degree is adjusted to the defrosting opening degree, then the defrosting frequency is reduced by 5Hz every 30 seconds, the defrosting opening degree is reduced by 4%, and the adjustment is stopped until the frequency is reduced to the defrosting lower limit frequency; and the air exchange temperature, the unit high-pressure value and the defrosting duration are monitored, when any one of the three parametersexceeds a set value, the unit exits the defrosting mode, the frequency of the compressor is reduced to the lowest frequency and kept for 5 seconds, a fan is started and waits for 5 seconds, and the unit is switched back to normal heating. The method can reduce the defrosting switching impact of the air source heat pump, improves the unit safety, and reduces the noise. Meanwhile, the real-time matching of the defrosting heat demand and the unit heat supply can be kept, the total defrosting time is shortened, and the defrosting energy consumption is reduced.

The invention provides a non-stop defrosting system and an air-conditioner. The non-stop defrosting system comprises a compressor, a first four-way valve, a second four-way valve, a first three-way valve, a second three-way valve, a first outdoor heat exchanger, a second outdoor heat exchanger, an indoor heat exchanger, a first throttling device and a second throttling device. According to the technical scheme, each outdoor heat exchanger is composed of two parts and the flowing direction of refrigerating fluid can be controlled through one four-way valve and one three-way valve; after the outdoor heat exchangers are frosted, compressor non-stop and indoor unit ceaseless heating can be achieved through the alternate defrosting mode of the two outdoor heat exchangers, heating operation efficiency of the air-conditioner is greatly improved, and thus the heating comfort of the air-conditioner is increased; and meanwhile, the problem of frequent start and stop of main electric parts like the compressor is effectively avoided, the defrosting speed is increased, and therefore the effect of reducing energy consumption is achieved, the failure rate of the main electric parts like the compressor can be better lowered, and user experience is improved.

The invention provides a defrosting control method for a variable-capacity compressor system. The variable-capacity compressor system comprises a variable-capacity compressor, a four-way valve, as well as a first control tube and a second control tube which are selectively connected with a variable-capacity control port of the variable-capacity compressor through a variable-capacity switchover valve. The method comprises the step of after detecting and knowing that the variable-capacity compressor system runs in a defrosting manner and first preset conditions are reached, controlling the variable-capacity switchover valve to connect the first control tube or the second control tube with the variable-capacity control port, so as to enable the variable-capacity compressor to work in a first defrosting mode with a plurality of working cylinders. According to the defrosting control method for the variable-capacity compressor system, which is provided by the invention, after the defrosting running is completed and the first preset conditions are reached, the variable-capacity switchover valve is controlled to introduce a high pressure, thus the variable-capacity compressor works in the first defrosting mode with the plurality of working cylinders, and then a refrigerant circulation quantity is increased, a defrosting speed is increased, and the great lowering of an indoor environment temperature due to a too long defrosting time is avoided.

The invention discloses an air conditioner and a defrosting system thereof. The defrosting system comprises an enthalpy increasing compressor, an outdoor heat exchanger, an indoor heat exchanger and an economizer unit; the enthalpy increasing compressor comprises a medium-pressure chamber and an enthalpy nozzle which communicates with the medium-pressure chamber; an outlet end of the outdoor heat exchanger is connected with a flow dividing capillary tube and a defrosting liquid accumulation tube in parallel; the economizer unit is provided with a first flow channel and a second flow channel; a first end of the first flow channel selectively communicates with one of the flow dividing capillary tube and the defrosting liquid accumulation tube via a first pipeline system; a second end of the first flow channel communicates with the indoor heat exchanger via a main pipeline; the first end of the second flow channel is connected with the main pipeline via an auxiliary pipeline; the second end of the second flow channel is connected with the enthalpy nozzle of the enthalpy increasing compressor via a second pipeline system; the second pipeline system is provided with a valve device; and the auxiliary pipeline is provided with a throttling and pressure reducing component. By the arrangement, the defrosting system of the air conditioner disclosed by the invention can shorten the defrosting time and satisfy the comfort requirement of a user.

The invention provides a multi-split air conditioner defrosting control method and an air conditioner multi-split air conditioner system. The multi-split air conditioner defrosting control method is applied to the air conditioner multi-split air conditioner system. The air conditioner multi-split air conditioner system comprises a plurality of indoor units. The multi-split air conditioner defrosting control method comprises the steps that when a defrosting instruction is received, the accumulated running time of each indoor unit is obtained; according to the accumulated running time, the multiple indoor units are divided into the common indoor units and the target indoor units; and when the preset time duration is reached after the defrosting instruction is received, inner draught fans ofthe common indoor units are controlled to be stopped, and inner draught fans of the target indoor units are controlled to run at the high wind gear till defrosting is over. In the defrosting period, except a compressor acts and provides the defrosting heat, in the high-wind-gear running process of the target indoor units, heat can be absorbed from the corresponding installing indoor space, heat energy is provided for defrosting, accordingly, the defrosting speed is increased, and bad experience brought to users due to the too long defrosting time is avoided.

The invention discloses a refrigerating system and a refrigerator with the refrigerating system. The refrigerating system comprises a freezing compressor, a freezing condenser, a freezing evaporator, a refrigeration compressor, a flow direction controller, a refrigeration condenser, a condensing heater, a refrigeration evaporator and a refrigeration fan, wherein an inlet of the flow direction controller is connected with an inlet of the refrigeration compressor, the inlet of the refrigeration condenser is connected with a first outlet of the flow direction controller; an inlet of the condensing heater is connected with a second outlet of the flow direction controller; an outlet of the condensing heater is connected with the inlet of the refrigeration condenser; the condensing heater is close to the freezing evaporator; an inlet of the refrigeration evaporator is connected with an outlet of the refrigeration condenser; an outlet of the refrigeration evaporator is connected with the inlet of the refrigeration compressor; and the refrigeration fan is matched with the refrigeration evaporator. The refrigerating system provided by the embodiment of the invention has the advantages of low energy consumption and the like.

The invention provides an air-conditioner defrosting control method and device, an air conditioner and a computer-readable storage medium. The defrosting control method comprises the following steps that when the air conditioner receives a defrosting signal, a four-way valve is controlled to reverse; an electrical auxiliary heating device is started, and a current set temperature Ts and a currentinner ring temperature Tin of the air conditioner are detected continuously; an inner motor is rotated reversely and operates at an initial speed N; and the speed of the inner motor is adjusted according to the detected set temperature and the detected inner ring temperature. According to the air-conditioner defrosting control method and device, the air conditioner and the computer-readable storage medium, defrosting can be accelerated, the indoor temperature is kept stable, and user experience is improved.

The invention provides a fixed-frequency air conditioner and a control method and device for an indoor draught fan thereof. The method comprises the steps of obtaining the current temperature of an indoor heat exchanger; detecting and identifying that the current temperature is less than or equal to a shutdown protection temperature, and continuously operating for a preset time; and according to the current temperature, controlling the rotating speed of the indoor draught fan to be adjusted, so that the defrosting period of the air conditioner is effectively shortened, the downtime of a compressor is shortened, the refrigerating effect is improved, and the refrigerating experience of users is guaranteed.

The invention belongs to the technical field of air conditioners, and provides a self-cleaning control method for an air conditioner. The method aims to solve the problem that the normal experience ofthe user is influenced due to long self-cleaning time caused by the fact that an existing self-cleaning control mode of the air conditioner is generally slow in frosting speed. 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 storage box. The self-cleaning control method comprises the following steps that under a heating working condition, a compressor undergoes frequency reduction, a four-way valve is reversed, the opening degree of an electronic expansionvalve is reduced and the rotating speed of the liquid pump is improved, so that an indoor heat exchanger frosted; after the indoor heat exchanger is frosted, the electronic expansion valve is shut off first, and then an electromagnetic valve at the low pressure side of the compressor is shut off after preset time; and the 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 is improved.

The invention provides an air conditioner defrosting control method, a control device and an air conditioner. The control method comprises the steps of after the relative air humidity RH and the outdoor unit coil temperature T meet the first preset conditions, enabling the air conditioner to enter a defrosting mode; enabling a compressor to defrost at high frequency, and converting the compressorto defrost at low frequency after the outdoor unit coil temperature T meets the second preset condition; and when the outdoor unit coil temperature T meets the third preset condition, exiting the defrosting mode. By reasonably controlling the frequency of the compressor, not only can the defrosting speed be accelerated, but also a defrosting effect can be guaranteed.

The invention discloses a heat pump system which comprises a compressor, a four-way valve, an indoor machine, an outdoor machine, a throttling device and a first on-off valve. A first valve port of the four-way valve is connected with a compressor outlet, and a third valve port of the four-way valve is connected with a compressor inlet. The indoor machine is provided with a first indoor machine opening and a second indoor machine opening, the outdoor machine is provided with a first outdoor machine opening and a second outdoor machine opening, the first indoor machine opening is connected with a second valve port, and the first outdoor machine opening is connected with a fourth valve port. A first opening of the throttling device is connected with the second indoor machine opening, and a second opening of the throttling device is connected with the second outdoor machine opening. A first port of the first on-off valve is connected with the fourth valve port and the first outdoor machine opening, and a second port of the first on-off valve is connected with the second outdoor machine opening and the second opening of the throttling device. The heat pump system has the advantages of being fast in defrosting, small in heating fluctuation, high in efficiency and the like.