57results about How to "Reduce frosting speed" patented technology

The invention discloses an air conditioner control method. The method includes after an air conditioner operates in a heating mode, acquiring the temperature of an evaporation coil of an air conditioner outdoor unit; judging whether the temperature of the evaporation coil is smaller than a first preset temperature or not; if so, increasing the rotation speed of an air conditioner outdoor fan. The invention further discloses an air conditioner. After the air conditioner operates in a heating mode, the temperature of the evaporation coil of the air conditioner outdoor unit is detected, when the temperature of the evaporation coil is smaller than the first preset temperature, the rotation speed of the air conditioner outdoor fan is increased, the heat exchange between the outdoor evaporator and the outdoor air is accelerated, the frosting velocity of the air conditioner outdoor evaporator is decreased, the interval time between two adjacent defrosting operations is prolonged, excessively frequent air conditioner defrosting operation is avoided, the indoor temperature is stable constantly, and the comfort for using the air conditioner to heat is improved for users.

The invention provides a heat pump air-conditioning system and a control method thereof. The heat pump air-conditioning system comprises a compressor (1), at least one outdoor heat exchangers, a firstindoor heat exchanger (15), a second indoor heat exchanger (16), and at least one by-pass lines arranged between the compressor (1) and at least one outdoor heat exchangers; the effluent air of an air cylinder of the compressor (1) is bypassed into at least one outer heat exchangers through the by-pass lines, so that the defrosting of at least one outdoor heat exchangers can be carried out. According to the heat pump air-conditioning system and the control method thereof, when the outdoor heat exchanger is defrosted, the indoor heat exchanger still has some hot air passing through, thereby preventing cold air from entering the room.

The invention relates to technical field of air conditioning, in particular to an energy storage-type air conditioning system. The energy storage-type air conditioning system comprises a compressor, a four-way valve, an outdoor heat exchanger, a first stop valve, an energy storage module and an indoor heat exchanger which are connected in sequence; the energy storage module and the indoor heat exchanger are respectively connected with the four-way valve through a second stop valve; the energy storage module comprises an energy storage coiler, a first expansion valve and a second expansion valve, wherein the first expansion valve and the second expansion valve are respectively arranged at two ends of the energy storage coiler; the energy storage coiler is arranged in a phase-change material; the first expansion valve is connected with the first stop valve; the second expansion valve is connected with the indoor heat exchanger; through the energy storage module and by controlling the opening of all electromagnetic valves and the expansion valves, various running modes of the system are realized, the performance of the existing air conditioning system is improved, and the energy storage-type air conditioning system can use electricity in off-peak hours.

The invention discloses an air conditioner and a control method thereof. The air conditioner comprises a compressor, a detection device and a controller. The detection device is used for acquiring the relative humidity of outdoor air. The controller is connected with the compressor and the detection device, and the controller is used for determining whether the relative humidity of the outdoor air is larger than the first preset relative humidity before the air conditioner works in a defrosting mode, and reducing the operation frequency of the compressor if the relative humidity of the outdoor air is larger than the first preset relative humidity. The air conditioner provided by the embodiment of the invention can reduce the frosting speed of a heat exchanger of an outdoor unit, so as to reduce frosting times of the air conditioner, prolong the time of heating operation, raise the continuity of the heating operation, and raise the users' comfortableness.

The invention provides a heat pump air-conditioning system and a control method of the heat pump air-conditioning system. The heat pump air-conditioning system comprises a compressor, a four-way valve, an indoor heat exchanger, a first throttling device, an outdoor heat exchanger and a second throttling device. The outdoor heat exchanger comprises a main heat exchanger and a defrosting heat exchanger. The defrosting heat exchanger is located on the air flowing upstream side of the main heat exchanger. The second throttling device is connected with the defrosting heat exchanger in series to form a defrosting pipeline. When the heat pump air-conditioning system is under a heating working condition, refrigerant starts from an exhaust opening of the compressor, passes through the indoor heat exchanger and the first throttling device and then is divided into two branches; one branch flows back into the compressor via the main heat exchanger, and the other branch is throttled by the second throttling device, enters the defrosting heat exchanger and then flows back into the compressor. According to the heat pump air conditioning system, the frosting frequency of the main outdoor heat exchanger in the heat pump air conditioning system can be lowered, the heat pump air conditioning system can be under normal heating work condition for a long time, and the work energy efficiency of the heat pump air conditioning system is improved.

The invention provides a control method for an air conditioner, a control device for the air conditioner and the air conditioner. The control method for the air conditioner comprises the steps that the temperature T1 of a coil pipe when the air conditioner is frosted for the first time is recorded; the temperature of the outdoor environment is detected, and a preset strategy and a first preset temperature corresponding to the temperature range of the temperature of the outdoor environment is found out according to the temperature of the outdoor environment; and after the air conditioner finishes frosting for the first time and is switched into a heating mode, the temperature T of the coil pipe is detected, and when T-T1 is less than or equal to the found first preset temperature, the opening degree of an expansion valve and the on-off states of a first heating element are controlled according to the found preset strategy. According to the scheme of the control method for the air conditioner, the control device for the air conditioner and the air conditioner, different treatment strategies can be adopted when the air conditioner is about to be frosted according to the temperature of the outdoor environment so as to control the operation of a heating element in the coil pipe and/or a heating element in an indoor unit and the operation of the expansion valve so that the defrosting period can be shortened, the temperature fluctuation in a room can be reduced, and therefore continuous heating can be achieved.

The invention discloses a heat exchanger. The heat exchanger comprises a plurality of heat exchange cores arranged in the vertical direction, a first collecting main, a second collecting main and a communicating piece. A heat exchange pipe of the upper heat exchange core of every two adjacent heat exchange cores is communicated with a heat exchange pipe of the lower heat exchange core through the communicating piece. Every two adjacent heat exchange cores are located in the different planes. Due to the fact that every two adjacent heat exchange cores are located in the different planes, condensate water generated by every two adjacent heat exchange cores flows in the different planes, multiple different drainage paths are provided for drainage of condensate water, the drainage amount borne by each drainage path is greatly reduced, the drainage efficiency of the heat exchanger is improved, the frosting speed of the heat exchanger is effectively reduced under the outdoor low-temperature and high-humidity working condition, the frosting amount is reduced, the refrigeration and heat exchange capacity and the heat exchange performance of the heat exchanger are improved, and energy consumption is reduced.

The invention provides an air-conditioning heat exchanger using a mixed refrigerant and an air conditioner. The air-conditioning heat exchanger comprises a finned tube exchanger, a collecting pipe, at least two paths of shunting pipes, and a shunt for connecting the collecting pipe with each shunting pipe, wherein the collecting pipe is connected with an inlet end of the shunt; a shunting outlet of the shunt is connected with one end of the each shunting pipe respectively; the other end of the each shunting pipe is connected with a pipeline on the finned tube exchanger; and the air-conditioning heat exchanger is characterized in that: each shunting pipe is vertically arranged and has the same inner diameter of 2.0 to 3.5mm. The mixed refrigerant is a mixture of an HFC-32 (high-frequency current) refrigerant and an HFO-1234ze (high frequency oscillator) or HFO-1234yf refrigerant, and the HFC-32 refrigerant accounts for at least 50 percent of total weight of the mixed refrigerant. The problem of temperature glide of the mixed refrigerant brought by non-azeotropy can be solved. In addition, the heat exchange efficiency and heating capacity of the air-conditioning heat exchanger can be improved.

The invention discloses a control method of an air conditioner, and the control method of the air conditioner can reduce frosting. Specifically, if fins of an outdoor heat exchanger of the air conditioner are hydrophobic coatings, the control method comprises the following steps of: enabling water on the fins of the heat exchanger to form water drops on the hydrophobic coatings when the air conditioner operates in a heating mode, driving a fan of an outdoor unit to reversely rotate, enabling air to blow towards the heat exchanger, and enabling water on the fins of the heat exchanger to drop under action of air. If fins of the outdoor heat exchanger of the air conditioner are hydrophilic coatings, the control method comprises the following steps of: detecting whether an outdoor temperatureis lower than a preset temperature or not when the air conditioner operates in a heating mode, and driving the fan of the outdoor unit to reversely rotate if the outdoor temperature is lower than thepreset temperature; otherwise, driving the fan of the outdoor unit to positively rotate. The control method of the air conditioner solves the problem that the air conditioner is high in frosting speedin winter, and increases heating capacity of the air conditioner when the temperature in winter is low, so that a room reaches a temperature set by a user more quickly, and therefore, user experienceis improved.

The invention discloses a method for reducing the frosting speed of an outdoor machine of an air conditioner system as well as an air conditioner system and an outdoor machine. An adsorption device is arranged on a windward side of a heat exchanger of the outdoor machine of the air conditioner system and used for adsorbing vapor in the air blowing towards the heat exchanger. The adsorption device is arranged on the windward side of the heat exchanger and used for adsorbing the vapor in the air blowing towards the heat exchanger so as to dehumidify the air blowing towards the heat exchanger, so that the vapor content of the air exchanged with the heat exchanger is greatly reduced, the frosting speed on the surface of the heat exchanger is reduced, the heating defrosting period is prolonged, and the heating capacity is improved.

The invention provides a heat pump air conditioning system and a control method thereof. The system comprises a compressor, a four-way valve, an indoor heat exchanger, a first throttling device, a second throttling device, a main heat exchanger and a defrosting heat exchanger, the defrosting heat exchanger is located on the air flowing upstream side of the main heat exchanger, and the second throttling device and the defrosting heat exchanger are connected in series to form a defrosting pipeline. Under the heating working condition, a refrigerant passes through the indoor heat exchanger, the first throttling device and the main heat exchanger from an exhaust port of the compressor, is throttled by the second throttling device, enters the defrosting heat exchanger after being throttled by the second throttling device, and then flows back to the compressor. A refrigerant heating device is arranged on at least one of the exhaust pipeline, the air suction pipeline and the defrosting pipeline of the compressor. According to the heat pump air conditioning system, the frosting frequency of the main outdoor heat exchanger can be reduced, the heat input of a refrigerant of the whole system can be enhanced, the heating duration is prolonged, and continuous indoor heat supply is achieved in the defrosting period.

The invention provides a heat pump air conditioning system and a control method thereof. The system comprises a compressor, a four-way valve, an indoor heat exchanger, a first throttling device, a second throttling device, a main heat exchanger and a defrosting heat exchanger, the defrosting heat exchanger is located on the air flowing upstream side of the main heat exchanger, and the second throttling device and the defrosting heat exchanger are connected in series to form a defrosting pipeline. Under the heating working condition, a refrigerant passes through the indoor heat exchanger, the first throttling device and the main heat exchanger from an exhaust port of the compressor, is throttled by the second throttling device, enters the defrosting heat exchanger after being throttled by the second throttling device, and then flows back to the compressor. A refrigerant heating device is arranged on at least one of the exhaust pipeline, the air suction pipeline and the defrosting pipeline of the compressor. According to the heat pump air conditioning system, the frosting frequency of the main outdoor heat exchanger can be reduced, the heat input of a refrigerant of the whole system can be enhanced, the heating duration is prolonged, and continuous indoor heat supply is achieved in the defrosting period.`.

The invention provides an air-conditioning system. The air-conditioning system comprises a frequency conversion compressor, condensers, a super-cooling device, an air-conditioning expansion valve and an evaporator which are connected through refrigerant pipelines. The super-cooling device is configured to receive a total flow path refrigerant flowed out from the condensers. The total flow path refrigerant is distributed into a main pipeline and a branch pipeline of the super-cooling device when the total flow path refrigerant is flowed into the super-cooling device. The refrigerant flowed into the branch pipeline is subjected to throttling expansion through a super-cooling expansion valve arranged on the branch pipeline, then cools the refrigerant in the main pipeline or the total flow path refrigerant through heat exchange, and finally flows into a refrigerant input pipe of the frequency conversion compressor, so that the working temperature of the frequency conversion compressor can be reduced to a preset temperature range. By employing the air-conditioning system, the operation stability of the compressor is improved, and the heating is not attenuated under an outdoor low temperature condition.

The invention belongs to the technical field of air conditioner control, and particularly relates to a heating control method and device for an air conditioner, the air conditioner and a storage medium. The heating control method for the air conditioner provided by the invention comprises the following steps: determining whether or not first temperature difference between an initial first temperature of an outer coiled tube and a current second temperature of the outer coiled tube is greater than or equal to a preset first temperature threshold value; increasing opening degree of an electronicexpansion valve; judging whether second temperature difference between a third temperature of the outer coiled tube and the first temperature is smaller than a second temperature threshold value if the first temperature difference is judged to be within first preset time length; and if the judged result is yes, regulating the electronic expansion valve according to a preset target gas exhaust temperature of a compressor, and entering a defrosting mode if the judged result is no. According to the heating control method and device for the air conditioner, the air conditioner and the storage medium provided by the invention, frosting speed of an outdoor unit of the air conditioner can be reduced, heating time is effectively prolonged, frequency of making the air conditioner enter the defrosting mode is reduced, and ability of evenly heating within single defrosting period is improved.

The invention belongs to the technical field of air conditioners, and particularly relates to a control method for suppressing frosting of an air conditioner. In order to effectively suppress the frosting speed of the air conditioner, the control method for suppressing frosting of the air conditioner comprises the following steps: a current value of an outdoor fan of the air conditioner is detected in real time; if the detected real-time current value is equal to a standard current value, the current value I<n> of the outdoor fan of the air conditioner is detected every first preset time, andif the difference between I<n> and I<n-1> is greater than or equal to a set current value, the rotating speed of the outdoor fan is controlled to be the second rotating speed, wherein the standard current value is the current value, measured in the state that the outdoor fan is not frosted, of the outdoor fan; 50 revolutions subtracted from the first rotating speed is the second rotating speed; and I<n-1> is the current value detected in the previous time of I<n>, n is a positive integer greater than 1, and the first rotating speed is the rotating speed when the outdoor fan is at the highest gear. The rotating speed of the outdoor fan is adaptively adjusted according to the current of the outdoor fan, and thus the frosting speed of the air conditioner is effectively decreased.

The invention belongs to the technical field of air conditioners, and particularly relates to a frosting inhibition control method for an air conditioner. In order to effectively suppress the frostingspeed of the air conditioner, the frosting inhibition control method for the air conditioner comprises the following steps that the current value of an outdoor fan of the air conditioner is detected;and the rotating speed of the outdoor fan is controlled according to the current value of the outdoor fan. According to the method, the rotating speed of the outdoor fan is controlled mainly by utilizing the current value of the outdoor fan, and the frosting speed of the air conditioner is delayed as much as possible on the premise of ensuring the heating operation efficiency of the air conditioner, so that the defrosting frequency is reduced, and the influence on the indoor temperature is reduced. Particularly, by comparing the real-time current value of the outdoor fan with a standard current value, the growth trend of the current of the outdoor fan is judged, and the possibility of frosting of the outdoor unit and the frosting speed can be more accurately judged according to the growthtrend of the current of the outdoor fan, so that the rotating speed of the outdoor fan is adaptively adjusted, and the frosting speed of the air conditioner is effectively reduced.

The invention provides an air conditioner self-cleaning control method and device, an air conditioner and a storage medium. The air conditioner self-cleaning control method comprises the step that when the air conditioner is in a self-cleaning mode, an indoor heat exchanger is controlled to cool and frost stage by stage, wherein the operation of controlling the indoor heat exchanger to cool and frost stage by stage comprises the steps that target tube temperatures corresponding to all the stages are acquired sequentially, and the indoor heat exchanger is controlled to cool based on the targettube temperatures corresponding to all the stages. Through the method, cooling speed of the indoor heat exchanger can be reduced, and noise generated in the frosting process can be lowered.

The invention discloses a hot-gas bypass and surface cooler supercooling defrosting device, comprising a compression engine, a first heat interchanger, a first solenoid valve and a second heat interchanger which are sequentially connected by a pipeline and form a loop; wherein the heat exchange tube in the second heat interchanger is composed of a supercooling section heat exchange tube at the bottom and an upper part section heat exchange tube, and the supercooling section heat exchange tube is connected with the upper part section heat exchange tube by an expansion valve. Another solenoid valve is also connected between the compression engine and the upper part section heat exchange tube. Compared with the prior art, the invention greatly reduces frosting speed, thus the hot-gas bypass defrosting effect is more rapid and effective; besides, through the supercooling of an evaporator, system energy efficiency ratio is improved, energy consumption is saved, and economic cost is reduced.

The invention provides an evaporator of an air source heat pump and a design method and the air source heat pump comprising the same for solving the problems that the frosting speeds of surfaces of fins of the air source heat pump evaporator are relatively high, the speeds of the frosted layers plugging a channel are relatively high and the defrosting period is relatively short in the prior art. The evaporator of the air source heat pump comprises a refrigerant pipeline and a plurality of fins mounted on the refrigerant pipeline in a serial manner. The design method comprises a step of designing a guiding structure capable of guiding water vapor in air to be liquefied rather than condensed on a windward sides of the fins, so that water vapor in the air is frozen rather than frosted, and therefore, purposes that the frosting and defrosting periods are prolonged, the defrosting energy consumption is reduced, and the integral performance of a unit is improved are achieved. The defrostingperiod of the evaporator of the air source heat pump in a same working condition and under a defrosting condition is about three times of an original period, so that the defrosting period is prolongedgreatly, and the work efficiency of the air source heat pump is improved. The evaporator of the air source heat pump is simple and reasonable in structure, low in cost and easy to implement and doesnot affect normal operation of the system.

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 control method and system for reducing a frosting speed of an air conditioner and the air conditioner. The control method comprises the steps of judging whether the air conditioner has a defrosting condition after the air conditioner operates in a heating mode for first preset time, and continuously judging whether defrosting is finished under a condition that the defrosting condition exists; and under the condition that the defrosting is determined to be finished, an outdoor unit operates at a set rotating speed higher than a normal rotating speed for second preset time, and operates at the normal rotating speed after the second preset time. Under the condition that the defrosting of the air conditioner is finished, the rotating speed of an outdoor unit fan is rapidly increased, and residual water and attached dust after defrosting on a heat exchanger are removed through a suction capacity of a draught fan so that the residual water and the attached dust do not exist on the heat exchanger before the air conditioner is started next time, at the moment, water in air condensed on the heat exchanger needs a certain period of time to be frosted, and thereforean effect of delaying a frosting speed is achieved.

The invention belongs to the technical field of air conditioners, and particularly relates to an anti-frosting control method for an indoor unit of an air conditioner in order to solve the problem that the user experience is affected due to loss of refrigerating capacity of the air conditioner during defrosting of the indoor unit. The anti-frosting control method comprises following steps: S110, detecting internal coil pipe temperature Tz at intervals of preset time under the condition of a refrigeration mode of the air conditioner; S120, judging a temperature interval where the internal coilpipe temperature Tz is located; and S130, selectively controlling opening of an expansion valve of the air conditioner according to the temperature interval. According to the steps, the opening of theexpansion valve is controlled according to the interval of the internal coil pipe temperature, then refrigerant flow in the air conditioner pipeline is controlled, slow defrosting of an indoor evaporator is realized, frosting speed of the indoor unit is reduced, and the air conditioner is enabled to less enter the frosting period, so that defrosting carried out by closing the expansion valve is as little as possible.

The invention provides an air conditioner, a high-temperature sterilization and defrosting control method and device thereof and a storage medium. The method comprises the steps of after receiving a high-temperature sterilization instruction, judging the current running state of the air conditioner; if the air conditioner is in the heating operation state currently, judging whether the air conditioner meets the preset critical defrosting condition or not; if not, immediately controlling the air conditioner to enter a high-temperature sterilization mode so as to execute the high-temperature sterilization action; and when the air conditioner meets the conventional defrosting condition in the process of executing the high-temperature sterilization action, controlling an indoor motor to reduce the rotating speed until the air conditioner meets the preset high-temperature sterilization exit condition. According to the air conditioner, the high-temperature sterilization and defrosting control method and device thereof and the storage medium provided by the invention, the problems that in the high-temperature sterilization process of the air conditioner, defrosting is carried out due to the fact that the air conditioner meets the defrosting condition, the high-temperature sterilization time is prolonged, and the sterilization effect is affected can be solved, so that the user experience is improved while the sterilization effect is guaranteed.

The invention discloses a heat exchanger with heating and cooling functions and a control method thereof. The heat exchanger comprises a fixing frame, a refrigerating pipe, a connecting pipe, a heater and fins, wherein the refrigerating pipe and the connecting pipe are respectively mounted on the fixing frame; the heater is mounted in the connecting pipe; and the refrigerating pipe is integrally connected with the connecting pipe through the fins. According to the heat exchanger, the refrigerating pipe and the connecting pipe with the heater which independently work respectively are connected by adopting the fins, and heat is transferred through the fins between the refrigerating pipe and the connecting pipe, so that the heat exchange area is enlarged and the heat exchange capacity is increased; and air can be also pre-cooled in a refrigeration mode, so that the frosting speed of the refrigerating pipe is reduced and the running reliability and stability of a product are improved. The heat exchanger is simple and compact in structure, simple to assemble and lower in cost; and meanwhile, the heater is mounted in the connecting pipe, so that the damage to surrounding materials caused by overheating of the heater is reduced and the safety and the reliability of the product are improved. Therefore, the heat exchanger has good application value.

The invention relates to the technical field of air conditioning, in particular to a heating control method of an air conditioner. The invention aims to solve the problems that the frosting speed is high and the user experience is affected when the air conditioner operates in a heating mode in the low-temperature and high-humidity environment. In order to achieve the purpose, the heating control method provided by the invention comprises the steps of determining the condensation temperature of an outdoor environment; obtaining the temperature of an outer coil pipe of an outdoor heat exchanger; comparing the temperature of the outer coil pipe with a first temperature threshold value and the condensation temperature; and when the temperature of the outer coil pipe is smaller than the first temperature threshold value and larger than or equal to the condensation temperature, adjusting the opening degree of a throttling valve according to the temperature interval where the temperature of the outer coil pipe is located. According to the control method provided by the invention, the frosting speed of the outdoor heat exchanger can be delayed, the situation that under the special outdoor environment condition, the opening degree of the throttling valve is controlled only according to the target exhaust temperature, and the throttling valve is smaller when being closed is avoided, the heating capacity curve is ensured to be stable, attenuation is slow, and the user experience is improved.

The invention provides a high-precision stepping type electronic expansion valve control method and system, the method is applied to a main control module of a stepping type electronic expansion valve drive circuit, and the method comprises the steps that parameters of an electronic expansion valve are initialized; calculating the opening degree deviation according to the current opening degree and the target opening degree of the electronic expansion valve, and calculating the current time interval according to the current time and the last valve adjusting time; judging that the opening degree deviation is smaller than a set adjusting threshold value; further judging whether the current time interval is greater than or equal to a fine tuning period; calculating a first average opening degree and a second average opening degree; and respectively calculating the closeness degrees of the first average opening degree and the second average opening degree with the target opening degree, and adjusting the opening degree of the electronic expansion valve. The control precision of the electronic expansion valve can be improved on the premise that the cost of the driving circuit and the electronic expansion valve is not increased.