34results about How to "Reduce refrigerant flow" patented technology

The invention discloses an anti-condensation control method for electronic control on the refrigerant heat dissipation of an air conditioner. The anti-condensation control method comprises the following steps: an environment temperature T1 and a refrigerant heat dissipation pipe temperature T2 are acquired, and the temperature difference value t between the environment temperature T1 and the refrigerant heat dissipation pipe temperature T2 is calculated; if the temperature difference value t is greater than a first preset temperature, the opening degree of an electronic expansion valve of an outdoor unit is controlled to be increased in a preset control manner; and because the opening degree of the electronic expansion valve of the outdoor unit is increased, interception for a refrigerant is reduced and then the flow rate of the refrigerant is increased, the refrigerant flows through a refrigerant heat dissipation pipe and then the refrigerant heat dissipation pipe temperature T2 rises, and the temperature difference value t is reduced in the case of the invariable environment temperature T1, so that an electronic control board is prevented from generating condensation. The invention further discloses an anti-condensation control device for electronic control on the refrigerant heat dissipation of an air conditioner. The method and the device solve the problem that the electronic control board generates dew to influence the electronic control reliability when the refrigerant heat dissipation pipe temperature is lower than a dew point temperature during the running of the air conditioner.

The invention discloses a control method for preventing bias flow of refrigerants during heating of a multi-connected air conditioning unit. The method comprises the following steps of: a, starting the multi-connected air conditioning unit; b, measuring a middle temperature T0 of an indoor heat exchanger (2), wherein an indoor machine of which the T0 is the highest has the most refrigerants, and the indoor machine of which the T0 is the lowest has the fewest refrigerants; c, measuring an outlet temperature T1min of the indoor heat exchanger (2) of the indoor machine which has the fewest refrigerants, measuring an outlet temperature T1max of the indoor heat exchanger (2) of the indoor machine which has the most refrigerants, and calculating a difference value delta T between the T1min and the T1max; d, judging whether the delta T is more than or equal to 5, if so, increasing the aperture of an indoor machine electronic expansion valve (4) of the indoor machine which has the fewest refrigerants, and decreasing the aperture of the indoor machine electronic expansion valve (4) of the indoor machine which has the most refrigerants; and e, repeating the steps b to d at certain intervalsuntil the multi-connected air conditioning unit is shut down. By the method, heating effect of each indoor machine is better, and waste is avoided.

A canned linear motor armature and a canned linear motor of water cooling type are provided. The insulation reliability of a canned linear motor armature is improved. The temperature rises of both the linear motor surface and the armature winding are reduced. Even if the coolant pressure increases, the can neither breaks nor deforms. The weight of the armature is lightened. The viscosity braking force is reduced. In the canned linear motor armature, the armature winding (104) is surrounded with a picture-frame-shaped case (111), both the openings of the case (111) are closed with flat can (121), and coolant passages (131) are provided inside the can (121) and on the top surface of the coil side of the armature winding (104).

The invention discloses a refrigerant control system and a method. The refrigerant control system comprises an acquisition device, a calculating device and an electronic expansion valve, wherein the acquisition device is used for acquiring discharge temperature, suction temperature, high-pressured pressure and low-pressured pressure; the calculating device is used for calculating discharge superheat, target suction superheat and actual suction superheat, judging whether the actual suction superheat is higher than the target suction superheat or not, and sending a judgment result to the electronic expansion valve; the electronic expansion valve is used for increasing refrigerant flux when the actual suction superheat is higher than the target suction superheat, and reducing the refrigerant flux when the actual suction superheat is lower than the target suction superheat. According to the refrigerant control system provided by the invention, the acquisition and the calculation of the temperature and the pressure are utilized, so that the refrigerant volume flowing into a compressor can be ensured to be within a controlled range, and engine oil of the compressor can be prevented from being diluted by more refrigerant, and the safe and stable operation of the system is ensured. The invention also discloses an air conditioner comprising the refrigerant control system.

The invention relates to the field of air conditioners and discloses a variable-frequency air conditioner and a condensation prevention control method for a variable-frequency module radiator of the variable-frequency air conditioner. The variable-frequency air conditioner comprises a main refrigerant flow way (512a) capable of cooling the variable-frequency module radiator (6) and a parallel connection refrigerant flow way (512b), wherein the parallel connection refrigerant flow way and the main refrigerant flow way are arranged in parallel. The condensation prevention control method comprises the steps of S1, the temperature detection, wherein the temperature Tf of the variable-frequency module radiator (6) and the temperature Ti of the environment where the variable-frequency module radiator is located are detected; S2, the temperature control, wherein when Tf is smaller than Ti, the flow of a refrigerant flowing the parallel connection refrigerant flow way (512b) is increased to reduce the flow of the refrigerant flowing the main refrigerant flow way (512a), so that the situation that the flow of the refrigerant taking participating in the cooling variable-frequency module radiator is excessive, and consequently the surface temperature of the cooling variable-frequency module radiator is lowered to below the air dew point temperature of the environment is avoided, and condensed water is effectively prevented from being generated on the variable-frequency module radiator on the premise of guaranteeing the good heat dissipation effect.

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 discloses a heat exchanger structure. The heat exchanger structure comprises fins and a flat pipe connected with the fins in a locating manner, wherein grooves are concavely formed inwards on two side surfaces of the flat pipe and extend along the length direction of the flat pipe. The invention also discloses an assembly process of the heat exchanger structure, comprising the following steps of: (1) sequentially piling and fixing the fins; (2) embedding a lug boss of a welding material sheet into each groove in a matching manner, and connecting the welding material sheet and the flat pipe in the locating manner; (3) locating the flat pipe connected with the welding material sheet in the locating manner and the fins; and (4) placing the flat pipe and the fins in a brazing furnace to weld. By using the heat exchanger structure and the assembly process thereof, the welding material uniformity is improved, a connecting region is beneficially formed by the welding material around a contact point of the fins and the flat pipe, the welding strength is improved, and because the grooves are arranged in the middle of the flat pipe, the density of microchannels in the center of the flat pipe is reduced, the phenomenon, such as freezing and the like caused by too low temperature in the center is improved, the pipeline groove radius can be correspondingly increased while the welding quality is ensured, and a flanging height is beneficially designed.

An air conditioner comprises a compressor, a first indoor heat exchanger, a second indoor heat exchanger and a dehumidifying restricting device, which is connected between the first indoor heat exchanger and the second indoor heat exchanger, and used as a restricting device in the dehumidifying operation, wherein the airflow speed of an indoor fan used for ventilating the first indoor heat exchanger and the second indoor heat exchanger, is variable in the dehumidifying operation. The air conditioner comprises: a function of setting the indoor fan as a low air flow speed operation or a high air flow rate speed operation; and a function of operating the compressor with a higher capacity in the high air flow rate speed than in the low air flow speed operation.

The invention relates to the technical field of air conditioners, and discloses an air conditioner control method and device, an air conditioner and a storage medium. The method comprises the steps that when the air conditioner is in a refrigeration mode, the current operation frequency of a compressor is obtained; when the current operation frequency reaches the minimum limiting frequency, whether the indoor temperature of the indoor environment where the air conditioner is located is smaller than the set temperature or not is judged; and when the indoor temperature of the indoor environment where the air conditioner is located is smaller than the set temperature, the opening degree of a first electronic expansion valve is increased, and the opening degree of a second electronic expansion valve is reduced, so that the refrigerant pressure between an outdoor heat exchanger and a flash evaporator is reduced, the refrigerant flow at an indoor heat exchanger is reduced, and therefore liquid refrigerant entering the indoor heat exchanger is decreased, the output cooling load of the air conditioner can better meet the actual requirement, the condition the compressor of the air conditioner maintains the stable indoor temperature in a non-stop state is ensured, meanwhile, the risk of liquid return is reduced, the system reliability is enhanced, and the purpose of improving the comfort of a user is achieved.

The invention discloses an air conditioner. The air conditioner comprises a refrigerant circulation loop composed of a compressor with a gas-liquid separator, a four-way valve, an outdoor exchanger and an indoor heat exchanger; the air conditioner further comprises a throttling device arranged on the refrigerant circulation loop; the throttling device is formed by connecting a throttling assembly and a control valve; one end of the throttling device is connected with the outdoor exchanger, the other end of the throttling device is connected with the indoor heat exchanger, and the invention further discloses an air conditioner control method and device and a computer readable storage medium; through the throttling assembly and the control valve of the throttling device, the flow of refrigerants flowing through the position between the outdoor exchanger and the indoor heat exchanger is controlled, the flow of flowing refrigerants is reduced, the refrigerant flow flowing back to the compressor is reduced, and therefore the exhaust temperature and the compressor bottom temperature during system running can be improved, the bottom overheat degree and the exhaust overheat degree of the compressor are improved, and the reliable running of the compressor can be ensured.

An air conditioner, comprises a compressor, an outdoor heat exchanger, an outdoor fan, a first indoor heat exchanger and a second indoor heat exchanger, a dehumidifying restricting device, and an indoor fan. The air conditioner includes a refrigerant flow path on the upstream side of the air flow in the first indoor heat exchanger, which is used as a refrigerant entrance in the dehumidifying and cooling operation of the first indoor heat exchanger, and then as a refrigerant export in the heating operation, so as to form a refrigerant flow in a flowing system; other refrigerant flow pathes disposed on the downstream side of the refrigerant in the dehumidifying and cooling operation of the first indoor heat exchanger, so as to form refrigerant flows in two or more flowing systems; and another refrigerant flow path with two or more flowing systems in the second indoor heat exchanger, which is provided in the air flow downstream side of the refrigerant with two or more flowing systems.

The present disclosure relates to a tumble dryer 1 with a rotatable drum 11 and a heat pump for drying process air that enters the drum, the heat pump comprising a condenser 19, a compressor 17, and an evaporator 15. In order to improve energy efficiency, the rotatable drum comprises a circular rear wall with air inlet openings and a radial cylindrical wall with air outlet openings, the compressor 17 is adapted to be run by an inverter 29, allowing the compressor output to be varied, and the expansion 16 is controllable. This allows the heat pump arrangement to be controlled to an optimum heat pump cycle envelope.

The invention provides a server heat dissipation device and a server heat dissipation method. The heat dissipation device comprises a water tank, wherein the water tank comprises a liquid inlet, a liquid outlet, a bottom wall and a side wall arranged above the bottom wall, the side wall and the bottom wall jointly form a containing cavity for containing a server, and the containing cavity is provided with a server inlet and outlet; a baffle which is arranged in the containing cavity and divides the containing cavity into a liquid collecting cavity and a server containing cavity, wherein the liquid collecting cavity is communicated with the liquid inlet, the server containing cavity is communicated with the liquid outlet, a plurality of servers are placed in the server containing cavity, and flow guide through holes are formed in the positions, opposite to the servers, of the baffle; and an opening adjusting part which is arranged on at least one flow guide through hole to adjust the opening degree of the flow guide through hole. According to the scheme, the refrigerant flow of the server nodes can be independently controlled to achieve independent and controllable heat dissipation of the server nodes, the heat dissipation effect of each server node is guaranteed while the refrigerant flow is reduced, the heat dissipation efficiency is improved, and energy is saved.

The invention relates to the technical field of intelligent household appliances, and discloses an anti-freezing control method for an air conditioner evaporator. Two air outlets can be formed in the cabinet air conditioner, and a first evaporator and a first throttling valve are arranged on the cabinet air conditioner; after the first air outlet of the air conditioner is closed, the first temperature of a coil pipe on the first evaporator is obtained, when the first temperature is lower than the preset temperature, the opening degree of the first throttling valve is adjusted, so that the flow of a refrigerant flowing through the first throttling valve is reduced, so that the first temperature of the first coil pipe is increased, so that the surface of the first evaporator is prevented from freezing, and the first evaporator is prevented from freezing after the first air outlet is closed while a user experiences an air conditioner refrigeration mode through the second air outlet. The invention further discloses an anti-freezing device for the air conditioner evaporator and the cabinet air conditioner.

The invention discloses a refrigeration device heat dissipation control method. The refrigeration device heat dissipation control method comprises the steps that the temperature of an electric controlmodule in a refrigeration device is acquired at regular time; the dew point temperature corresponding to the outdoor environment of the refrigeration device is acquired; and when the temperature of the electric control module is lower than the dew point temperature, the opening degree of a flow control part is adjusted to reduce the flow of refrigerants in a refrigerant flow path. The invention further discloses a refrigeration device heat dissipation control device, the refrigeration device and a computer readable storage medium. According to the refrigeration device heat dissipation controlmethod and device, the refrigeration device and the computer readable storage medium, when the temperature of the electric control module is lower than the dew point temperature, the flow of the refrigerants in the refrigerant flow path is reduced by the flow control part so that heat exchange between the refrigerants and the electric control module can be reduced, and the temperature of the electric control module can be increased to avoid condensation of the electric control module.

The invention relates to the technical field of refrigeration, and discloses an air conditioner with double heat exchangers and a control method thereof. The air conditioner with the double heat exchangers comprises a compressor, a reversing device, an outdoor heat exchanger, a first heat exchanger, a first throttling device and a second heat exchanger which are sequentially connected through pipelines. One end of the second heat exchanger is connected with the reversing device through a pipeline, the first throttling device and the second heat exchanger are connected with a first adjusting valve in parallel, and the first throttling device and the first heat exchanger are connected with a second adjusting valve in parallel. According to the air conditioner, refrigerant distribution of the two heat exchangers can be adjusted according to actual needs, unnecessary refrigerant flow is reduced, energy saving is facilitated, meanwhile, dehumidification can be carried out under the condition that cooling is not carried out, and the implementation mode is simple and reliable.

The invention discloses an air conditioner outdoor unit which comprises a bidirectional variable flow pipeline. An outdoor heat exchanger of the air conditioner outdoor unit comprises an upper heat exchange part and a lower heat exchange part; the bidirectional variable flow pipeline comprises a throttling element and a first one-way valve which are connected in parallel; in the heating mode, a refrigerant enters the lower heat exchange part from the throttling element for heat exchange, and the flow of the refrigerant flowing through the lower heat exchange part is reduced through the throttling element, so that the heat exchange efficiency of the lower heat exchange part is improved; during defrosting, the refrigerant flowing through the lower heat exchange part does not pass through the throttling element, so that the refrigerant flow of the lower heat exchange part is increased, the defrosting speed of the lower heat exchange part is increased, and the defrosting time of the lower heat exchange part is shortened; and through the flow path design of the bidirectional variable flow pipeline, the refrigerant quantity at different positions of the outdoor heat exchanger is in the optimal state in the heating mode and the defrosting mode, the overall heat exchange efficiency is improved, the overall defrosting time is shortened, and the technical problem that the flow path design of the heating mode and the defrosting mode of an existing air conditioner outdoor unit cannot be optimal at the same time is solved.

The invention discloses a heat exchanger and an indoor unit of the air conditioner. The heat exchanger comprises a heat exchanger main body and a plurality of refrigerant sub inlet tubes, wherein eachrefrigerant sub inlet tube communicates with a heat exchange tube in the heat exchanger main body; the refrigerant sub inlet tubes are arranged in the height direction of the heat exchanger main body; and tube diameters of the refrigerant sub inlet tubes are different. According to the heat exchanger disclosed by the invention, flow of a refrigerant on the upper part of the heat exchanger is reduced, and flow of the refrigerant on the lower part of the heat exchanger is increased, so that uneven refrigerant distribution as a result of too great flow on the upper part of the heat exchanger dueto the inertia effect of the refrigerant can be neutralized, and therefore, refrigerant flow of each runner is more uniform, temperature uniformity of outlet air of the air hole of the air conditioner is improved, and comfort is improved.

The invention relates to the technical field of air conditioner control, particularly provides a refrigerant flow control method and system of an air conditioner. The problems of how to accurately detect whether a liquid refrigerant exists or not at the bottom of a compressor and how to prevent liquid return of the compressor are solved. The refrigerant flow control method comprises the steps that the heating state of the air conditioner is analyzed according to the environment temperature of an outdoor unit and the bottom temperature of the compressor during heating of the air conditioner (if the environment temperature of the outdoor unit is smaller than or equal to a first temperature threshold value and whether the bottom temperature of the compressor is smaller than or equal to a second temperature threshold value, if yes, the air conditioner is in a low-temperature heating state and the liquid refrigerant is generated at the bottom of the compressor, otherwise, the air conditioner is in a conventional heating state), different flow adjusting strategies are selected according to the heating state to adjust the flow of the refrigerant flowing into an evaporator, so that it is guaranteed that a large amount of liquid refrigerant cannot be generated at the bottom of the compressor in the heating process of the air conditioner and is sucked into the compressor, and compressor internal parts are damaged.