73 results about "Refrigerant reclamation" patented technology

The present invention provides a heat pump air conditioning system, wherein the refrigerant circuit includes a compressor, an air-side outdoor heat exchanger, a water-side outdoor heat exchanger, and an indoor heat exchanger. The indoor heat exchanger is connected to the air-side outdoor heat exchanger and the water-side outdoor heat exchanger via a liquid-side connecting pipe, an air-side pipeline, and a water-side pipeline, respectively. A detection unit is configured to infer flammable refrigerant leakage, and a control unit is configured to perform refrigerant recovery control and correct the opening of the air-side throttling device based on the temperature difference of the flammable refrigerant in the air-side pipeline and the water-side pipeline, and correct the opening of the water-side throttling device based on the temperature difference of the flammable refrigerant in the water-side pipeline and the air-side pipeline, so that the opening changes of both devices under refrigerant recovery control do not exceed a set range. The present invention can avoid the problem of premature liquid filling during the refrigerant recovery process, which may cause system shutdown and lead to recovery failure, and ensure complete and stable refrigerant recovery.

A device for recovery of refrigerant from a sealed heat transfer system includes a refrigerant conduit formed in the device for guiding a flow of refrigerant from the heat transfer system to a refrigerant outlet of the device, a refrigerant inlet to the refrigerant conduit. The refrigerant inlet can be provided in a surface of the device. The device can include a tool for providing an opening between an opening area of a part of the heat transfer system and the refrigerant inlet, a driver to drive a movement of the tool in order to provide the opening in the opening area. The device further includes a first gas conduit formed in the device for guiding a flow of gas between a first internal gas opening being provided in a surface of the device and a first external gas opening of the device.

The utility model relates to the technical field of refrigeration equipment maintenance, in particular to a refrigeration equipment maintenance refrigerant recovery device which comprises a protective shell, a recovery barrel is rotatably matched with the lower side of the inner wall of the protective shell, a plurality of partition cavities are formed in the upper side of the recovery barrel, and a liquid inlet is formed in the upper side of the protective shell; a connecting pipe is arranged on the inner wall of the liquid inlet; and the upper side of the recycling barrel is fixedly connected with a rotating shaft extending to the upper side of the protective shell. According to the cooling liquid storage device, the recycling barrel and the spacing cavities are arranged, the cooling liquid storage device can be connected with an external refrigerant outlet through the connecting pipe, the cooling liquid can be conveyed into the spacing cavities through the connecting pipe, and when different cooling liquids are stored, the recycling barrel can be rotated to enable the different spacing cavities to be aligned with the liquid inlet; and when the upper portion of the recycling barrel abuts against the upper side of the inner wall of the protective shell, different cooling liquid can be stored separately, the multiple cooling liquid can be recycled conveniently, and the application range of the cooling liquid recycling device is widened.

The present invention relates to a ventilation structure for a refrigerant recovery unit. To address the lack of protection for the springs of the intake and / or exhaust valves of a conventional refrigerant recovery unit when impacted by liquid refrigerant, the present invention provides the following solution. The ventilation structure for a refrigerant recovery unit includes a valve seat (1) with an air hole, a valve body (2, 2A) axially movable relative to the air hole, a compression spring (7, 7A) attached to the valve body, and a protection unit (6, 6A) mounted on the valve seat. The protection unit has an annular wall (621) surrounding the compression spring, with a predetermined distance between the compression spring and the valve seat. The region of the protection unit located between the compression spring and the valve seat forms a radial ventilation passage. The beneficial effect of the ventilation structure for a refrigerant recovery unit of the present invention is that it reduces or avoids the impact of liquid refrigerant on the compression spring due to radial airflow.

The present invention provides a refrigeration cycle device that prevents refrigerant recovered in the heat source side's refrigerant circuit from leaking into the utilization side's refrigerant circuit through a closed valve. [Solution] The refrigeration cycle device includes a refrigerant circuit (10) including a heat source side circuit (20a) and a utilization side circuit (40a), a utilization unit (40) for air conditioning the target space (S), a refrigerant leak sensor (70) for detecting refrigerant leaks in the utilization side circuit (40a), and a first shut-off valve that, when the refrigerant leak sensor (70) detects a refrigerant leak, shuts off the flow of refrigerant from one end of the heat source side circuit (20a) to the utilization side circuit (40a). The system includes (43), a second shut-off valve (26) that shuts off the flow of refrigerant from the other end of the heat source side circuit (20a) to the utilization side circuit (40a), and a control unit (100) that performs a first recovery operation to recover refrigerant to the heat source side circuit (20a) when the refrigerant circuit (10) is shut off by the first shut-off valve (43) and the second shut-off valve (26) and a first condition regarding refrigerant leakage to the utilization side circuit (40a) is met.

The present application provides an air conditioner and an automatic refrigerant recovery method. The air conditioner comprises an indoor unit, an outdoor unit, and a recovery assembly. The recovery assembly comprises a detection module, a control module, and an execution module; the detection module is used for acquiring air conditioner operation data and refrigerant detection data of an indoor space; the execution module is used for controlling connection / disconnection of pipes of the air conditioner and achieving recovery of a refrigerant from the indoor unit to the outdoor unit; and the control module is communicatively connected to the detection module and the execution module. In the air conditioner and the automatic refrigerant recovery method provided by the present application, by means of the structure of the air conditioner itself, the refrigerant is recovered to an outdoor heat exchanger for storage, thereby simplifying the structures of automatic refrigerant recovery apparatuses, and thus lowering the design difficulty, installation cost and maintenance cost of the automatic refrigerant recovery apparatuses.

The present application relates to an air source heat pump system, through the setting of combined liquid accumulator and the improved start-up and shutdown anti-liquid return control program matched with the combined liquid accumulator, the liquid return during the start-up process of the unit can be effectively avoided, the time from the start-up to the stable operation of the refrigeration system is shortened, the problem of liquid strike of the compressor during the start-up process is effectively solved, the reliability and service life of the unit are improved, and during the shutdown process of the compressor, the excessive refrigerant of the system is recycled to the combined liquid accumulator, so that the problem of excessive refrigerant of the unit during the next stage start-up for a short time is avoided.

The application provides a refrigerant recovery system and a control method thereof. The refrigerant recovery system comprises a liquid cooling circuit and a refrigerant circuit. The refrigerant circuit is connected with an air conditioner to be recovered. The refrigerant of the air conditioner to be recovered can flow into the refrigerant circuit, and the liquid cooling circuit can exchange heat with the refrigerant circuit. The refrigerant circuit comprises a compressor, a condenser, a throttling device and a first heat exchanger. The compressor, the condenser, the throttling device and the first heat exchanger are sequentially connected to form a first circulation circuit. The throttling device is connected with the air conditioner to be recovered. The first heat exchanger is further connected with a liquid storage tank. The refrigerant of the air conditioner to be recovered sequentially passes through the throttling device, the first heat exchanger, the compressor and the condenser, and then flows into the liquid storage tank through the first heat exchanger. According to the application, the high and low pressure ratio of the refrigerant recovery system in the prior art is overcome, the slow recovery speed and low efficiency of the refrigerant are improved, and the recovery efficiency is improved.

The invention relates to the technical field of energy-saving refrigerating equipment, in particular to an energy-saving refrigerating unit with a refrigerant recovery function, which comprises a compressor, an evaporator and a storage module. A first pipeline and a second pipeline are respectively arranged on the compressor; the condenser is communicated with the first pipeline, a third pipeline is arranged on the condenser, and a fourth pipeline is arranged between the first pipeline and the third pipeline; the evaporator is respectively communicated with the second pipeline and the third pipeline; valves are respectively arranged on the first pipeline, the second pipeline, the third pipeline and the fourth pipeline; a recovery pipe group is arranged on the storage module and communicates with the first pipeline, the second pipeline and the third pipeline; the compressor can extract a gaseous refrigerant in the storage module through the recovery pipe set and convert the gaseous refrigerant into superheated steam, and the superheated steam can flow into the storage module through the first pipeline, the fourth pipeline, the third pipeline and the recovery pipe set in sequence. The air conditioner has the effect of reducing residual refrigerant.

The invention provides refrigerant recovery and purification equipment. The refrigerant recovery and purification equipment comprises a recovery module, a water removal module and an oil removal module. A water removal module and an oil removal module are introduced into the recovery equipment, so that the problem of pollution caused by refrigerant recovery from the device is solved; the flow direction of the valve bank is controlled in the recovery mode, when the quality of a refrigerant to be recovered is high, a direct recovery mode is adopted, only the recovery module is started, and the refrigerant is recovered only through the recovery module; and in the purification and recovery mode, the refrigerant sequentially passes through the water removal module, the oil removal module and the recovery module. Through cooperation of different modules under different conditions, the recovery speed is greatly increased.

This air conditioner comprising a refrigerant circuit, indoor units, and an outdoor unit comprises: liquid piping which enables a refrigerant to flow between an outdoor heat exchanger and indoor unit expansion valves; a bypass pipe which is for bypassing of the refrigerant from the liquid piping to an accumulator; a supercooling heat exchanger which is provided to the liquid piping and is configured to exchange heat between the refrigerant flowing through the bypass pipe and the refrigerant flowing through the liquid piping; a supercooling expansion valve which is provided to the bypass pipe and is capable of adjusting the flow rate of the refrigerant flowing from the liquid piping to the supercooling heat exchanger; a liquid-side shutoff valve which is provided to the liquid piping between the supercooling heat exchanger and indoor heat exchangers; an discharge pressure sensor which detects the discharge pressure of the refrigerant that is discharged from a compressor; and a control part which controls operation of the air conditioner. Upon receiving a refrigerant leakage detection signal from a refrigerant leakage sensor, the control part: closes the liquid-side shutoff valve; performs a refrigerant recovery operation for moving the refrigerant, which is circulating in the refrigerant circuit, to the outdoor unit; and, during the refrigerant recovery operation, changes the opening degree of the supercooling expansion valve according to a detection value of the discharge pressure sensor.

A connector device for quickly charging an electric vehicle according to exemplary embodiments of the present invention comprises: a power supply line for supplying power; a refrigerant supply line for introducing a refrigerant; a refrigerant recovery line for recovering the introduced refrigerant; a connector unit that is coupled to each of the refrigerant supply line and the refrigerant recovery line, and can be connected to a charging terminal of the electric vehicle in order to supply power to the electric vehicle; and a refrigerant bypass line which is provided inside the connector unit and to which one of the two ends of the refrigerant supply line and one of the two ends of the refrigerant recovery line are connected. At least a portion of the refrigerant bypass line may be provided with a short-circuit prevention unit provided to maintain an insulating function even in a cryogenic state imparted by the refrigerant, and thus the charging efficiency of the connector device for quickly charging the electric vehicle may be significantly improved.

The present invention discloses a refrigerant recovery device and a control method thereof, and relates to the field of refrigerant recovery technology. The present invention includes a recovery unit, a vibration component, a self-cleaning component and a valve component. The recovery unit includes a recovery pipeline. The vibration component is arranged on the outer surface of the recovery pipeline to peel off the oil stains attached to the inner wall of the recovery pipeline. The self-cleaning component includes a self-cleaning pipeline, which is connected to the recovery pipeline and is used to self-clean the pipeline by introducing external airflow to blow the recovery pipeline. The valve component is arranged in the recovery pipeline and the self-cleaning pipeline for pipeline switching when the operating mode of the refrigerant recovery equipment is changed. In this way, the oil stains attached to the refrigeration machine recovery equipment can be cleaned without stopping the machine for disassembly and cleaning, thereby improving the cleaning convenience of the refrigeration machine recovery equipment and reducing the flow resistance in the recovery pipeline, thereby greatly improving the recovery efficiency of the refrigerant recovery equipment.

The utility model provides an air conditioner. The air conditioner comprises an indoor unit, an outdoor unit and a recovery assembly, the recovery assembly comprises a detection module, a control module (7) and an execution module, and the detection module is used for obtaining air conditioner operation data and refrigerant detection data of indoor space; the execution module is used for controlling on-off of an air conditioner pipeline and recycling refrigerants in the indoor unit to the outdoor unit, and the control module (7) is in communication connection with the detection module and the execution module. According to the air conditioner, the refrigerant is recycled into the outdoor heat exchanger to be stored through the structure of the air conditioner, the structure of an automatic refrigerant recycling device is simplified, and therefore the design difficulty, the installation cost and the maintenance cost of the automatic refrigerant recycling device are reduced.

Methods are directed to on-site recovery and repurposing of refrigerant. The on-site recovery and / or repurposing recovers an original refrigerant and converts, in-situ, the original refrigerant into a converted refrigerant different from the original refrigerant. The converted refrigerant has a relatively lower global warming potential than the original refrigerant.

The invention relates to the field of refrigerant recovery, in particular to a full-automatic refrigerant recovery system and a refrigerant flow control method thereof. The method comprises the following steps that when a main control unit detects that a user sends a refrigerant recovery instruction based on an interface, the initial safe opening degree is calculated; generating a recovery control instruction based on the initial safety opening degree, and sending the recovery control instruction to a flow regulating valve to perform refrigerant recovery operation; real-time vibration recovery detection and liquid cooling impact risk analysis are conducted on refrigerant recovery operation according to the vibration detection unit, and the liquid impact risk of the current valve opening degree is obtained; carrying out convergence adjustment on the opening degree of the valve based on the liquid impact risk, and continuously monitoring a vibration signal of the recycling machine; whether the liquid impact residual phenomenon exists or not is determined based on the recycling machine vibration signal, and when it is determined that no liquid impact phenomenon exists, the opening degree of a flow adjusting valve is maintained; the weight value of the recycled steel cylinder is detected based on the metering unit. According to the invention, efficient and safe full-automatic refrigerant recovery management is realized.

The utility model discloses an efficient refrigerant recycling device, which belongs to the field of refrigerant recycling and comprises a refrigerant recycling machine body, a collecting pipe is connected to a collecting opening of the refrigerant recycling machine body, a tightening ring is connected to the collecting pipe in an external threaded manner, and a sealing ring is arranged on one side, close to the collecting pipe, of the tightening ring. A recycling head is fixedly mounted at the end, away from the refrigerant recycling machine body, of the collecting pipe. The sealing ring is arranged to be matched with the sealing plug, so that after a refrigerant is recycled, the driving extrusion state of the collecting sliding plug is removed by reversely rotating the sealing ring, and the collecting sliding plug moves towards the recycling head under the action of the compression spring and the arc-shaped filter screen, is attached to the conical surface groove and seals the collecting pipe, and a closed environment is formed; therefore, the situation that after recycling is completed, the refrigerant left in the collecting pipe leaks into the external environment, and air pollution is caused is avoided, and the effect of improving the environmental protection performance of the refrigerant recycling machine is achieved.

The present invention comprises: a high pressure connection port that communicates with a high pressure-side connection opening of a high pressure-side pipe of a refrigeration cycle device; a low pressure connection port that communicates with a low pressure-side connection opening of a low pressure-side pipe of the refrigeration cycle device; a suction connection port that connects to a suction opening of a recovery machine; a discharge connection port that connects to a discharge opening of the recovery machine; a liquid connection port that connects to a liquid opening of a cylinder; a gas connection port that connects to a gas opening of the cylinder; a switching unit that switches between a flow passage of a liquid recovery mode in which liquid refrigerant within the refrigeration cycle device is recovered and a flow passage of a gas recovery mode in which gas refrigerant within the refrigeration cycle device is recovered; and a control device that performs the switching of the flow passage of the switching unit. The control device includes: a determination unit that determines a switch from the gas recovery mode to the liquid recovery mode on the basis of the temperature of a liquid reservoir of the refrigeration cycle device; and a switching processing unit that performs a flow passage switching process of the switching unit.

The present invention relates to a refrigerant recovery device, comprising an air-cooled heat exchanger, a control box, a compressor having an input port and an output port, a recovery structure, a first pipeline connected to an external device and the air-cooled heat exchanger, a second pipeline connected to the air-cooled heat exchanger and the input port of the compressor, a third pipeline connected to the output port of the compressor and the air-cooled heat exchanger, a fourth pipeline connected to the air-cooled heat exchanger and the recovery structure, and a detection device for detecting the superheat of the refrigerant output by the external device. A first control valve is provided on the first pipeline, which automatically adjusts its opening according to the superheat of the refrigerant. The control box is connected to the first control valve and the detection device and is configured to adjust the opening of the first control valve according to the superheat of the refrigerant. This refrigerant recovery device achieves automatic recovery, reduces tedious manual operations, and has the advantages of being easy to operate, safe, and reliable.

According to the four-pipe unit and the control method thereof, in the four-pipe unit, an exhaust port is connected with a D port, an E port is connected with a T port, a first throttling element is arranged on a first branch, the first branch is connected with a P port and an R port, a second branch is connected with an O port and an air suction port, an S port is connected with the second branch, a C port is connected with an M port, and a third branch is connected with an N port and the first branch; a first switch valve is arranged on the fourth branch, the fourth branch is connected with the N port and the low-pressure injection inlet, a second switch valve is arranged on the fifth branch, the fifth branch is connected with the exhaust port and the high-pressure injection inlet, and the mixing outlet is connected with the air suction port. According to the four-pipe unit and the control method thereof, the refrigerant in the balance heat exchanger is recycled into the refrigerant circulation loop through the ejector, and the problem that the refrigerant in the system circulation loop is insufficient can be solved.

The invention discloses an energy-saving refrigerating unit with a refrigerant recovery function and a method, and relates to the technical field of refrigerating units. The device comprises a refrigeration main machine arranged in a refrigeration outer box, and further comprises a recycling box, a liquid suction assembly is arranged between the recycling box and the refrigeration main machine, and a liquid drainage mechanism is arranged on the recycling box; the supporting plate and the partition plate are fixedly installed in the recycling box and used for supporting, and a servo motor is arranged on the supporting plate; the liquid squeezing unit comprises a reciprocating assembly and a squeezing assembly; the impurity removing unit comprises a linkage assembly and a shoveling assembly. The refrigerant recovery device has the advantages that a refrigerant can be quickly sucked and removed in a direct pumping mode, the recovery efficiency is high, a pipeline cannot be damaged, meanwhile, the liquid outlet efficiency of the refrigerant can be further improved by adopting a mode that reciprocating extrusion is matched with a filtrate hole for filtering liquid outlet, impurities in the refrigerant can be filtered and removed during liquid outlet, and the refrigerant recovery device is convenient to use. And the recovered refrigerant is purer, and the recovery effect is better.

The invention discloses an automobile air-conditioning heat exchanger test system and a refrigerant recovery method, the automobile air-conditioning heat exchanger test system with an automatic refrigerant recovery device comprises a compressor, an automatic refrigerant recovery device, an automatic refrigerant recovery device, an automatic refrigerant recovery device and an automatic refrigerant recovery device, the inlet is connected with a tested evaporator outlet and an auxiliary evaporator outlet; the high-low voltage protector is connected with the compressor in parallel; the condenser is arranged at an outlet of the compressor; an inlet of the liquid accumulator is connected with an outlet of the condenser, and an outlet of the liquid accumulator is connected with an auxiliary steam inlet through an automatic ball valve in front of an auxiliary steam valve and an auxiliary steam expansion valve in sequence and further connected with an inlet of an automatic ball valve in front of a main loop valve; an outlet of the main loop valve front automatic ball valve is connected with an inlet of a flowmeter or an outlet of a tested condenser; an outlet of the main expansion valve is connected with a tested evaporator inlet or an auxiliary evaporator inlet. Refrigerant waste can be avoided, and compared with the prior art, the device is more energy-saving and environment-friendly, lower in testing cost, lower in safety risk and more simplified in experimental process.

The present application relates to the first compressor field, specifically to a kind of refrigerant recovery system and control method, mixed tank, for storing refrigerant to be recycled;First heat exchanger, with first passage and second passage are coupled with each other;The inlet of first passage is communicated with the outlet of mixed tank;First compressor, its inlet is communicated with the outlet of first passage;Separation device, its inlet is communicated with the outlet of first compressor;Separation device includes first outlet and second outlet, second passage is easy adsorption component from first outlet discharge, difficult adsorption component is discharged from second outlet, part of heat of difficult adsorption component discharged from second outlet is used to make the refrigerant flowing through first passage temperature rise;First storage device, for storing easy adsorption component from first outlet discharge;Second storage device, for storing difficult adsorption component from second outlet discharge, to effectively utilize the heat generated in the process of adsorption separation, improve separation efficiency.

An air conditioning system (1) comprises a first throttling device (217), a second throttling device (218), a third pipeline (350), a fourth pipeline (360) and a control part (13). The control part (13) is configured to control the air conditioning system (1) to execute a refrigerant recovery mode when leakage of the refrigerant occurs. The control part (13) is further configured to correct the opening degree of the first throttling device (217) based on the difference value between the temperature of the refrigerant in the third pipeline (350) and the temperature of the refrigerant in the fourth pipeline (360) when the air conditioning system (1) executes the refrigerant recovery mode; correcting the opening degree of the second throttle device (218) on the basis of the difference between the temperatures of the refrigerant in the fourth line (360) and the third line (350); and controlling the opening change of the first throttling device (217) and the second throttling device (218) in the refrigerant recovery mode not to exceed a preset range.

The first recovery device (16) recovers the compressed and condensed refrigerant generated by compressing and condensing the air-conditioning refrigerant. The adsorption device (418) includes an adsorption module (468). The adsorption module (468) has an adsorbent (350) that adsorbs the gas component (423) of the air-conditioning refrigerant in the mixed gas (22) composed of the gas component (423) of the air-conditioning refrigerant and the non-condensable gas (26) contained in the inside of the first recovery device (16) that recovered the compressed and condensed refrigerant. The desorption device (19) desorbs the gas component (423) of the air-conditioning refrigerant adsorbed to the adsorbent (350) and accumulates the desorbed gas component (423) of the air-conditioning refrigerant.

The utility model provides a refrigerant recovery device and a refrigerant recovery purification system, the refrigerant recovery device comprises a recovery tank, the recovery tank is provided with a refrigeration recovery port, and the refrigerant recovery device further comprises a distillation tank and a refrigeration part; the distillation retort is arranged close to the recovery tank, the refrigeration part is arranged between the distillation retort and the recovery tank, the refrigeration part is provided with a cold end and a hot end, the cold end faces the recovery tank and supplies cold energy to the recovery tank, and the hot end faces the distillation retort and supplies heat to the distillation retort; the distillation retort is provided with a distillation inlet and a distillation outlet. The refrigerant recovery device is simple in structure, the pressure of the recovery tank can be reduced, meanwhile, the distillation tank can be heated, the situation that the temperature of a refrigerant in the distillation tank is too low and influences the distillation effect due to continuous evaporation is prevented, meanwhile, the pressure of an air inlet of the compressor is increased, and the recovery rate can be increased.

A refrigerant recovery system includes a refrigerant circuit having a vacuum pump, a first connection port, a second connection port, a discharge port, and a multi-way valve that selectively fluidly connects the ports to the vacuum pump. The multi-way valve has a first configuration, a second configuration, and a third configuration for fluidly connecting the ports to the suction port and the discharge port of the vacuum pump. One method is to recover refrigerant from a refrigerant circuit using a refrigerant recovery system. The method includes operating the refrigerant recovery system in a liquid recovery configuration to transfer liquid refrigerant in the refrigerant circuit into one or more recovery cylinders; and operating the refrigerant recovery system in a gas recovery configuration to transfer gaseous refrigerant in the refrigerant circuit into one or more recovery cylinders. The recovery vehicle includes a transfer circuit of the refrigerant recovery system.

A refrigerant recovery system includes a refrigerant circuit with a vacuum pump, a first connection port, a second connection port, an exhaust port, and multiple-way valves that selectively fluidly connect said ports to the vacuum pump. The multiple-way valves have a first configuration, a second configuration, and a third configuration for fluidly connecting the ports to a suction inlet and a discharge outlet of the vacuum pump. A method is for recovering refrigerant from a refrigerant circuit using a refrigerant recovery system. The method includes operating the refrigerant recovery system in a liquid recovery configuration to transfer liquid refrigerant in an refrigerant circuit into one or more recovery cylinders and operating the refrigerant recovery system in a gas recovery configuration to transfer gaseous refrigerant in the refrigerant circuit into the one or more recovery cylinders. A recovery cart includes a transfer circuit of a refrigerant recovery system.