36results about How to "Timely defrosting" patented technology

The invention discloses a defrosting method for a heat-pump type air conditioner, which decides whether the defrosting operation mode, namely setting environment determination temperature t<1> and t<2> and three constants a, b and c, is carried out by combination of coil tube temperature T of an outdoor heat exchanger, outdoor temperature T, actual heating time H and set heating time h; under the following conditions, the unit starts the defrosting operation mode: 1. when T is less than or equal to t<1> and more than or equal to t<2>, if the coil tube temperature T of the outdoor heat exchanger meets the condition of T less than a, T plus c and H larger than h in a continuous M minutes, the unit starts to defrost; 2. when T is less than t<2>, if the coil tube temperature T of the outdoor heat exchanger meets the conditions of T less than b, T plus c and H larger than h in a continuous M minutes, the unit starts to defrost. The defrosting method has the advantages of shortening defrosting time, improving defrosting efficiency, leading to thorough defrosting and greatly improving heating efficiency.

The invention provides a method for controlling the defrosting of a refrigerator. The method comprises the following steps of: (A) detecting the environmental moisture and the environmental temperature of a refrigerator; (B) counting the opening frequency and the opening time of the refrigerator to obtain a cumulative opening frequency and a cumulative opening time; and (C) detecting the cumulative opening frequency and the cumulative opening time according to a specified time interval and defrosting the refrigerator when either the cumulative opening frequency or the cumulative opening time is larger than a preset specified value and the environmental moisture and the environmental temperature which are detected are under the specified conditions. Accordingly, a start defrosting point can be accurately confirmed according to practical environmental conditions, the operation conditions to the refrigerator, and the like so as to defrost in time to a certain degree and effectively reduce the power consumption.

The invention provides a defrosting control method of a refrigerator. The method comprises the steps of counting total working hours and door opening and closing times of the refrigerator from the last initialization operation of the refrigerator, and obtaining the ambient temperature and the ambient humidity of the refrigerator; obtaining a defrosting starting condition preset by the refrigerator, wherein the defrosting starting condition is that the number of door opening and closing times reaches a threshold of the number of the door opening and closing times, and the threshold of the number of the door opening and closing times is determined according to the total working hours, the ambient humidity and the ambient temperature; judging whether the refrigerator satisfies the defrosting starting condition, and if the refrigerator satisfies the defrosting starting condition, generating a defrosting starting trigger signal is generated. According to the defrosting control method, the threshold of the number of the door opening and closing times is determined according to the ambient humidity, the ambient temperature and the total working hours of the refrigerator, so that a defrosting starting point can be accurately determined according to the parameters of actual ambient conditions such as the ambient humidity, the ambient temperature and the like and working conditions such as the total working hours and the door opening and closing times of the refrigerator, and defrosting can be accurately performed in time according to actual conditions.

The invention relates to a refrigerator monitoring device based on refrigerator door opening/closing states and humidity detection. The refrigerator monitoring device comprises a plurality of contact-type position sensors, a humidity sensor and a master controller, wherein each contact-type position sensor is positioned on the inner side of a corresponding refrigerator door, and is used for detecting the opening/closing state of the corresponding refrigerator door; the humidity detector is used for detecting the humidity in a refrigerator; the master controller is connected with the humidity detector and each contact-type position sensor, and is used for determining whether to start frost detection and automatic defrosting of the refrigerator according to the received humidity in the refrigerator and the opening/closing states of a plurality of refrigerator doors. Through the refrigerator monitoring device, the frost detection and the automatic defrosting of the refrigerator can be performed timely when the refrigerator doors are opened too long or the humidity in the refrigerator is overhigh, and the defrosting efficiency of the refrigerator is improved.

The invention discloses a defrost control method for an air-conditioner. The method comprises the steps of detecting the refrigerant pressure of a heat exchanger, acquiring a corresponding saturation temperature according to the detected refrigerant pressure of the heat exchanger, acquiring the dew point temperature of the environment, and controlling the air-conditioner to enter a defrost mode when the corresponding saturation temperature is lower than 0 DEG C and lower than or equal to the dew point temperature of the environment. The invention further discloses a defrost control device for an air-conditioner. It can be guaranteed that defrosting can be conducted in time when frost exists, the situation that defrosting is conducted when no frost exists is avoided, energy consumption is reduced, and the service life of the air-conditioner is prolonged.

The invention discloses an air conditioner control method and device, a storage medium and an air conditioner. The method comprises the steps of determining a heat comfort state of an indoor environment of an air conditioner, and determining a frosting situation of an outdoor heat exchanger of the air conditioner; and according to the heat comfort state of the indoor environment and/or the frosting situation of the outdoor heat exchanger, determining a current operation mode of the air conditioner, and controlling the air conditioner to operate according to the current operation mode, whereinthe step of controlling the air conditioner to operate according to the current operation mode comprises: controlling the air conditioner to continuous operate at a heating mode, and controlling the air conditioner to reduce the output heat so as to operate, or controlling the air conditioner to operate at a defrosting mode, or controlling the air conditioner to stop or reduce frequency so as to operate. According to the scheme provided by the invention, the problem that since whether the air conditioner enters the defrosting mode or not is judged according to the temperature of the outdoor heat exchanger or a difference value between the temperature of the outdoor heat exchanger and the outdoor environment temperature, the heat comfort experience of a user is affected due to big indoor temperature drop during defrosting can be solved, and an effect on improving the heat comfort experience of the user during defrosting is achieved.

The invention relates to the field of air-conditioner technology and discloses an air-conditioner defrosting system which comprises a refrigerant circuit. The refrigerant circuit comprises a compressor, an indoor heat exchanger, a throttling device and an outdoor heat exchanger connected through a pipeline, wherein the indoor heat exchanger is arranged in an indoor unit and the indoor unit is provided with an inner blower for indoor air supply. The air-conditioner defrosting system further comprises a bypass shunt, a pipe line temperature sensing bulb, an air-out temperature sensing bulb and a controller, wherein the bypass shunt is used for defrosting the outdoor heat exchanger; a first end of the bypass shunt is connected with the pipeline between the compressor and the indoor heat exchanger; a second end of the bypass shunt is connected with the pipeline between the throttling device and the outdoor heat exchanger and a regulating valve used for regulating the refrigerant flow is arranged on the bypass shunt; the pipe line temperature sensing bulb is used for testing the pipe temperature of the outdoor heat exchanger; the air-out temperature sensing bulb is used for testing the air-out temperature of the inner blower; the controller is in electric connection with the regulating valve, the pipeline temperature sensing bulb and the air-out temperature sensing bulb respectively. The air-conditioner defrosting system and defrosting control method can reduce the failure rate of a reversing valve, simultaneously, avoid blowing cold wind to users and improve comfortableness.

The invention discloses a multi-split outdoor unit defrosting control system and method. The system comprises an imaging sensor arranged on the surface of a multi-split outdoor unit fin, the imaging sensor is connected with a defrosting controller through an imaging signal transmission line, and the defrosting controller is connected to a defrosting system through a defrosting control line. The imaging sensor is used for acquiring multi-split outdoor unit fin surface defrosting image information and transmitting the multi-split outdoor unit fin surface defrosting image information to the defrosting controller. Images are acquired by the imaging sensor, defrosting treatment can be performed once a preset threshold value is achieved, defrosting can be timely performed, defrosting effects aregood, building comfort is improved, and the system is economical, reliable, reasonable in running and convenient to mount. Automatic control is adopted, and expert management is omitted in cold weather.

The invention provides a defrosting control method and device for an air source heat pump system and an air conditioning system. The defrosting control method for the air source heat pump system comprises the steps that the environment temperature, the fin temperature, the fan running current and the duration time are selected to serve as parameter conditions for starting defrosting together; andthe fin temperature or defrosting operation time is selected to serve as a parameter condition for finishing defrosting. According to the defrosting control method of the air source heat pump system,defrosting of the air source heat pump system is accurate and timely.

The invention belongs to the technical field of air conditioning units, and aims at solving the problem that the defrosting judgment accuracy of an existing multi-split air conditioning unit is not high. The invention provides a defrosting control method for the multi-split air conditioning unit. The defrosting control method comprises the following steps: in the process of executing a heating mode by the multi-split air conditioning unit, acquiring the air pipe temperature and the liquid pipe temperature of an indoor unit; calculating the difference value between the air pipe temperature and the liquid pipe temperature of the indoor unit; judging whether the multi-split air conditioning unit meets the outdoor side preset defrosting condition or not; and selectively enabling the multi-split air conditioning unit to execute a defrosting mode according to the difference value and the judgment result of whether the multi-split air conditioning unit meets the outdoor side preset defrosting condition or not. According to the defrosting control method for the multi-split air conditioning unit, the false defrosting condition of the multi-split air conditioning unit can be avoided, the defrosting judgment accuracy is improved, the heating effect of the multi-split air conditioning unit can be truly reflected, defrosting is carried out in time when the heating effect is poor, and the influence on the use experience of a user is avoided.

The invention discloses a defrosting method and belongs to the technical field of air conditioners. The defrosting method comprises the steps that in the unsteady state heating process, the condensingpressure reducing rate index of the current time period is calculated, and whether the condensing pressure reducing rate index is smaller than a preset threshold value or not is judged, wherein the preset threshold value is the condensing pressure reducing rate index of a system achieved when a frost layer is accumulated to preset thickness; and if the condensing pressure reducing rate index is smaller than the preset threshold value, an air conditioner gets into a defrosting mode. The invention further discloses a defrosting device, the air conditioner and a storage medium. Whether the thickness of the frost layer on the surface of a condenser is accumulated to form the frost layer of the preset thickness or not is judged according to the condensing pressure reducing rate index, and thendefrosting is carried out in time.

The invention relates to the technical field of water heaters, in particular to an air-source water heater. The air-source water heater comprises a compression circulating pipeline and a defrosting device; the compression circulating pipeline comprises a compressor, a condenser, a throttling valve and an evaporator which are connected sequentially; an outlet of the evaporator is connected with aninlet of the compressor; the defrosting device is arranged on one side of the evaporator; and compressed air for blowing the surface of the evaporator to provide heat and power which are required during defrosting of the surface of the evaporator is stored inside the defrosting device. The invention further provides a defrosting method of the air-source water heater. Production of hot water by theaid of the air-source water heater is not hindered while defrosting is performed, the defrosting time is short, the efficiency is high, and the energy utilization rate is high.

The invention provides a fixed frequency air conditioner defrosting control method and a computer storage medium. The fixed frequency air conditioner defrosting control method comprises the steps thatwhether a fixed frequency air conditioner meets preset defrosting conditions or not is judged; if yes, the rotating speed of an internal fan of the fixed frequency air conditioner is obtained, wherein the rotating speed of the internal fan can be a high speed, a medium speed and a low speed; the defrosting duration is determined according to the rotating speed of the internal fan; and a defrosting device of the fixed frequency air conditioner is controlled to perform defrosting according to the determined defrosting duration. By means of the scheme, since the frosting situation of a heat exchanger is closely linked to the rotating speed of the internal fan in the fixed frequency air conditioner heating operating process, the defrosting duration is determined according to the rotating speed of the internal fan when the fixed frequency air conditioner meets the preset defrosting conditions, it can be guaranteed that defrosting of the fixed frequency air conditioner is timely and thorough, and in addition, energy wasting is reduced.

The invention provides a defrosting control device and a defrosting control system of a refrigerator, and relates to the technical field of intelligent refrigerators. The defrosting control device comprises an evaporation probe, a refrigerator temperature probe and a temperature data processing controller of the refrigerator; the temperature data processing controller is respectively connected with the refrigerator temperature probe and the evaporation probe; the refrigerator temperature probe is used for detecting the refrigerator body stock temperature of the refrigerator and transmitting the refrigerator body stock temperature to the temperature data processing controller; the evaporation probe is used for detecting the evaporation temperature and transmitting the evaporation temperature to the temperature data processing controller; and the temperature data processing controller is used for controlling the refrigerator to exit the refrigeration working stage and enter the defrosting working stage when the condition that the temperature difference value obtained by subtracting the evaporation temperature from the refrigerator body stock temperature is larger than a preset SET value lasts for a first preset duration in the process that the refrigerator is in the refrigeration working stage. The technical problem that the defrosting control efficiency of the refrigerator is low is solved.