214 results about "Refrigerant reclamation" patented technology

A refrigerant recovery unit is provided that can recover and recharge refrigerant. The unit is further configured with a pair of service hoses and a refrigerant control circuit operable to receive and transport the refrigerant between the hoses and the storage vessel and to process the refrigerant to substantially remove contaminants from the refrigerant. A fluid connector is provided in fluid communication with the hoses to enable the refrigerant to flow between the hoses and to establish a closed loop through the refrigerant control circuit, and a controller is operatively connected to the refrigerant control circuit and configured to control a flow of the refrigerant through the refrigerant control circuit and through the fluid connector.

The invention discloses an automatic recovery and fill system of a refrigeration system, comprising a refrigerant recovery and fill device, a vacuum extractor and a refrigeration oil recovery and fill device, wherein, the refrigerant recovery and fill device comprises a gas-liquid separation evaporating drum, a compressor, an oil separator, a condenser and a fluid reservoir; the refrigeration oil recovery and fill device comprises an oilway filter, an oil reservoir and an oil flowmeter. As an outlet of the oil separator of the system additionally has the refrigeration oil recovery and fill device, both refrigerant recovery and refrigeration oil recovery are realized, also, the refrigeration oil can be filled into the refrigeration system and the compressor. The gas-liquid separation evaporating drum of the invention can separate gas and liquid fully, while a heating strip under the drum enables liquid refrigerant in the drum to evaporate at every moment, which prevents the return liquid damaging the compressor. The system has the effects of energy saving and environmental protection.

A refrigerating cycle apparatus having a hot gas bypass heating mode that quickly recovers refrigerant in the condenser side to the evaporator side to maximize the work performed by the compressor in the hot gas bypass heating mode, to thereby maximize hot gas bypass heating capacity. Specifically, in a refrigerating cycle apparatus in which operation of a hot gas bypass heating mode is carried out with the inlet side of a condenser closed and the inlet side of a hot gas bypass conduit opened by valves, refrigerant in the condenser side is recovered to the evaporator side by operating the compressor for a predetermined time with the inlet sides of both the condenser and the hot gas bypass conduit closed by the valves.

A heat pump liquid heater for heating a liquid comprising: a heat pump; a liquid tank in heat communication with the heat pump, wherein the liquid tank comprises the liquid; and at least one metal condenser tube immersed into the liquid, wherein the metal condenser tube forms at least one coil. The metal condenser tube has a flattened double-tube configuration and a cross-section defined by concentric ovals such that at least a portion of the concentric ovals is in contact with one another thereby minimizing space between the flattened double-tubes. The heat pump comprises a tube-in-tube heat exchanger and a compressor, wherein the tube-in-tube heat exchanger recovers heat from refrigerant returning from the liquid tank and transfers the recovered heat to refrigerant going to the compressor thereby superheating the refrigerant.

An apparatus and method providing a refrigeration servicing system that comprises a clean refrigerant source, a recovery circuit and a flushing circuit. The recovery circuit can be configured to recover refrigerant from a cooling system. After recovery cycle is completed, the flushing circuit that is coupled to the recovery circuit can flush clean refrigerant through the recovery circuit. A housing can be provided and configured to house the refrigerant source, the recovery circuit and the flushing circuit.

The invention relates to the technical field of air conditioner maintenance, and in particular relates to a refrigerant recovering and filling machine of a vehicle air conditioner. The machine consists of a recovery part, a vacuumization part, an oil replenishing part, an oil filling part, an air exhaust part and a pressure checking part. The refrigerant recovering and filling machine of the vehicle air conditioner integrates recovery, vacuumization, oil replenishing, oil filling, air exhaust and pressure checking, so as to be capable of being used for directly maintaining a vehicle air conditioner system without scattered maintenance tools, such as a screwdriver special for dismounting a vehicle air conditioner valve core, a bottle opener, a system pressure gauge set and a vacuum pump, so that the work efficiency is improved, and the management cost is reduced; the refrigerant recovering and filling machine can be used for directly recovering the refrigerant without discharging the refrigerant to the atmosphere, so that resources are saved, and the environment is protected; and a weighting sensor is used for measuring the refrigerant filling amount without need of estimating the refrigerant filling amount according to experience, so that the risk of damaging the vehicle air conditioner or harming the personnel due to inaccurate refrigerant filling amount is reduced.

The invention relates to a test system and method for detection of an air conditioning system. The test system comprises an air conditioning system to be tested, a pressure maintaining loop, a vacuum pumping loop, a refrigerant charging and recovering loop and a control unit, wherein the pressure maintaining loop, the vacuum pumping loop and the refrigerant charging and recovering loop are connected with one other in parallel, and respectively connected with a low pressure pipe interface and a high pressure pipe interface of the air conditioning system to be tested through connecting pipes; all the loops are connected in series with solenoid valves for controlling the on/off of the loops; the solenoid valves are connected with the control unit. According to the invention, the functions of pressure maintaining, vacuum pumping, refrigerant recovering and charging and the like of the air conditioning system are integrated; the equipment is simple and convenient to operate; full automatic control is achieved; the accuracy of detection data of pressure maintaining, vacuum pumping, refrigerant recovering and charging is increased.

A method for converting a refrigerant recovery unit from use with a first refrigerant to use with a second refrigerant includes the steps of opening, with a controller, solenoids along a refrigerant path to remove residue of the first refrigerant into a holding vessel, operating a vacuum pump, as indicated by the controller, to further remove the residue of the first refrigerant from the refrigerant path, introducing, via the controller, an amount of the second refrigerant into the refrigerant path, determining, with a refrigerant identifier, a purity of the second refrigerant in the refrigerant path. A kit is also provided to convert the refrigerant recovery unit for use with the first refrigerant to the second refrigerant.

There are provided a refrigerating device capable of efficiently performing a refrigerant recovering operation even in a case where there are disposed a plurality of heat absorbing units functioning in different temperature zones, and a refrigerator including this refrigerating device. A refrigerating device 30 includes a compressor 1, a radiator 2, an expansion valve 3, a gas-liquid separator 4, a first heat absorbing unit 10 through which a liquid refrigerant from this gas-liquid separator 4 flows, and a second heat absorbing unit 11, and the refrigerating device performs a refrigerant recovering operation of stopping circulation of the refrigerant into the second heat absorbing unit 11, operating the compressor 1, recovering the refrigerant stored in a heat sink 58, and sending the refrigerant to the gas-liquid separator 4 to store the refrigerant in a state in which circulation of the refrigerant into the first heat absorbing unit 10 is stopped after ending a freezing operation.

The invention discloses a vacuum membrane distillation type sewage treatment device capable of recycling heat. The vacuum membrane distillation type sewage treatment device comprises a heating tank which is provided with a heater and used for heating sewage, wherein a sewage outlet of the heating tank is communicated with a sewage inlet of a membrane evaporator through a liquid circulating pump, and a sewage outlet of the membrane evaporator is communicated with a sewage backflow inlet of the heating tank; a refrigerant inlet and a refrigerant outlet of a heat pump condenser in the membrane evaporator are communicated with a refrigerant inlet and a refrigerant outlet of a heat pump evaporator through pipelines; and a steam inlet of the heat pump evaporator is communicated with a steam outlet of the membrane evaporator, a liquid water outlet of the heat pump evaporator is connected with a steam-water separator, and a gas outlet of the steam-water separator is connected with a circulating water vacuum pump, so that a vacuum system is formed. The vacuum membrane distillation type sewage treatment device is suitable for treating waste liquids containing heavy metal ions or purified seawater, has three functions of recycling water, concentrating waste liquid and saving energy and is characterized in that a refrigerant is used for recycling heat emitted by phase change of water steam, and the heat is used for heating sewage in the evaporator, so that the heat recycling effect is realized.

The invention provides a monitoring system of an air conditioning refrigerant recovery and filling device. A first electromagnetic valve for controlling connection and disconnection of a low-pressure pipe is arranged at the position of the low-pressure pipe of the air conditioning refrigerant recovery and filling device, a second electromagnetic valve for controlling connection and disconnection of a high-pressure pipe is arranged at the position of the high-pressure pipe of the air conditioning refrigerant recovery and filling device, and a relay respectively connected with the first electromagnetic valve and the second electromagnetic valve is used for controlling opening and closing of the first electromagnetic valve and the second electromagnetic valve and generating corresponding relay signals. A weighing device is arranged at the bottom of a working tank of the air conditioning refrigerant recovery and filling device and used for monitoring weight of refrigerant in the working tank in real time and generating corresponding weight monitoring signals. A control device respectively and electrically connected with the relay and the weighing device is used for receiving and recording the relay signals and the weight monitoring signals when the air conditioning refrigerant recovery and filling device is operated and comparing the received signals with a standard monitoring signal set in advance to generate a monitoring report.

The invention discloses a recycle system of air-conditioning outdoor machine refrigerant, comprising a refrigerating device and a refrigerant circulation loop composed of a compressor, a four-way reversing valve, a coil, a throttle mechanism and a heat exchanger; the air-conditioning outdoor machine is arranged on the air outlet of an air flue; the recycle system of air-conditioning outdoor machine refrigerant is provided with a recovering tank in which the coil is contained; when the refrigerant is recovered, refrigerant is communicated with the air-conditioning outdoor machine via a recovering tank ingress pipe; when the refrigerant is filled, the refrigerant is communicated with the air-conditioning outdoor machine via the recovering tank delivery pipe. The recycle system of air-conditioning outdoor machine refrigerant provided in the invention not only can thoroughly recover a great amount of air-conditioning outdoor machine refrigerant to be recovered but also can directly fill recovered refrigerant into an air conditioning to be reused without complicated processing, thus realizing environment protection and lowering cost.

A refrigerant recovery machine having two opposed and off-set pistons and its use are provided. The pistons are received in cylinders that are able to move depending on the alignment of the pistons. The two pistons in the compressor allow more volume of refrigerant than a single piston and because they are opposed and off-set allows for more even load on the motor.

A method and apparatus for ensuring a user to change a filter dryer of a refrigerant recovery unit having a refrigerant determining module that is configured to determine a condition of the refrigerant or an amount of refrigerant that has passed through the filter dryer, or a condition of the filter dryer, an alert device that notifies the user to change the filter dryer in response to the condition, a pressure module that regulates the pressure in the filter dryer, and a pressure-sensing device that is configured to detect a change of pressure in response to filter dryer maintenance. The refrigerant recovery unit is disabled from recovering refrigerant when the refrigerant determining module determines that the filter dryer needs to be replaced, and it is activated in response to the change of pressure detected by the pressure-sensing device.

A vehicle air-conditioning system of a dual air-conditioner type exhibiting a hot gas heater function, which is designed to efficiently recover not only dormant refrigerant at the heater side, but also dormant refrigerant at the rear seat evaporator, which system sets the refrigeration cycle to a cooling mode and engages in a refrigerant recovery operation when starting up the heating mode by a hot gas heater cycle, then switches the refrigeration cycle to the heating mode, sets the front seat air-conditioning unit to the outside air mode at the time of the heating mode to blow outside air to the front seat evaporator by the front seat blower, then, when judging that the inside air temperature is high due to the refrigerant temperature of the rear seat evaporator at the time of the heating mode, operates the rear side blower to blow inside air to the rear seat evaporator.

A refrigerant recovery unit is provided that is capable of communicating with a vehicle diagnostic tool. The diagnostic tool can retrieve vehicle information, such as vehicle identifying information or vehicle diagnostic information. The refrigerant recovery unit can diagnose the vehicle and provide fixes to the user using the database stored therein or from a remote location. The refrigerant recovery unit includes various hardware and software to communicate with electronic control units in the vehicle.

A method for using refrigerant to check for a leak in a refrigerant system is provided that establishing fluid communication between a refrigerant recovery unit and a refrigerant system. The refrigerant recovery unit passes a refrigerant through the refrigerant recovery unit, compresses the refrigerant utilizing the refrigerant recovery unit, and transfers the compressed refrigerant from the refrigerant recovery unit directly into the refrigerant system. Additional refrigerant is added into the refrigerant system until a desired system pressure is reached, and then the refrigerant system is checked for leaks.

First, a system for providing liquid refrigerant subcooling, subsequent to that subcooling accomplished by the primary condenser, by means of direct geothermal heat exchange and if required, secondary (or more) fluid(s) supplementary cooling of the liquid refrigerant contiguous with the direct geothermal subcooling. This system could be utilized with standard condensers for higher efficiency air conditioning, heat pump in the cooling mode, or refrigeration operation of any kind. No modifications to the actual condenser would be required, but a larger evaporator surface could be required.Secondly, a system for providing supplemental heat to the primary evaporator of a heat pump operating in the heating mode, by means of a direct geothermal heat exchange, coupled with heat reclaim of the liquid refrigerant, and if necessary with secondary (or more) fluid(s). This system would require some modification of a standard heat pump in addition to the installation of the direct geothermal liquid refrigerant reclaim, secondary (or more) fluid heat postheater. Next, a system that would provide liquid refrigerant subcooling by means of direct geothermal heat exchange and if required, secondary (or more) fluid(s) supplementary subcooling, coupled with a system that would provide direct geothermal, plus a possible secondary (or more) fluid, supplementary heat, to a postheater of a heat pump in the heating mode. That said postheater becoming a precooler of the hot gas refrigerant when the heat pump is in the cooling mode. Finally, a system that would provide liquid refrigerant subcooling by means of direct geothermal heat exchange and if required, a secondary (or more) fluid(s) supplementary subcooling coupled with a system that would provide direct geothermal heat exchange precooling of the hot gas refrigerant and if required, a secondary (or more) fluid(s) precooling of the hot gas refrigerant. This system could be utilized with standard air source or water source air conditioning or refrigeration condensers for producing more capacity and higher efficiency.

A system and methods associated therewith for providing a load controller for a refrigerant recovery unit are disclosed. The load controller can be controlled to operate when the current drawn by the motor increases due to pressure changes caused by abnormal refrigerant flow or during activation of the motor in order to lower the pressure. In some aspects of the present disclosure, the load controller can lower the pressure by recirculating some of the pressure load through the opening of a compressor bypass loop line. In some embodiments, the current/pressure load may be monitored during the operation of the refrigerant recovery unit and set to act as an emergency shut off and alert system to the user when the system malfunctions.

The present invention provides a liquid cooling system for a server main board. The system comprises a vertically positioned cooling cylinder in which an insulation refrigerant is arranged, a vertically positioned refrigerant recovery vat and a mobile machine arranged between the cooling cylinder and the refrigerant recovery vat; and the server main board is immersed in the insulation refrigerant in the cooling cylinder, and an openable and closeable cover plate capable of allowing the mobile machine to extend in is arranged at the top of each of the cooling cylinder and the refrigerant recovery vat. By adopting the liquid cooling system provided by the present invention, while the server main board is effectively cooled, the maintenance of the server main board is enabled to be more convenient and the insulation refrigerant is effectively recycled; the cooling and maintenance of the server main board are implemented in an environmentally-friendly, energy-saving and high-efficiency manner; the steam of the insulation refrigerant is prevented from leaking and dissipating, and the cooling capability of the cooling system is ensured; the personal safety of system operators is ensured; and the working efficiency of the server main board is improved and the working life of the server main board is prolonged, so that the service life of a computer that applies the server main board is prolonged and the and reliability of the computer that applies the server main board is improved.

A heat pump system and a method for starting a heat pump system are provided. The method comprises: receiving a start instruction; controlling the heat pump system to enter a start mode according to the start instruction; recycling refrigerant in the heat pump system under the start mode; determining whether the start mode is completed; and if yes, controlling the heat pump system to enter an operation mode.

A refrigerant recovery system includes a recovery apparatus and a refrigerant recovery unit. The recovery apparatus includes a heat sink, a capture tank, and a hose. The capture tank is in thermal contact with the heat sink. The capture tank is configured to capture a first refrigerant from a refrigeration system. The hose is to fluidly connect the capture tank to the refrigerant system. The refrigerant recovery unit includes a refrigerant storage unit, a refrigerant circuit, a processor and a memory. The refrigerant storage unit is configured to store a second refrigerant. The refrigerant circuit is in fluid connection with the heat sink. The refrigerant circuit is configured to circulate the second refrigerant through the heat sink, a compressor, and a condenser. The processor is configured to control the refrigerant recovery unit. The memory is to store diagnostic software and operating software to operate the refrigerant recovery unit.

The invention provides a test tool for an air conditioner indoor unit, which is provided with a condenser unit for forming a refrigerant circulation loop with an evaporator unit in the air conditioner indoor unit and is further provided with a compressor and a four-way valve, wherein the compressor is selectively and serially connected or disconnected with an air inlet pipeline of the condenser unit via the four-way valve. On the other hand, the invention further provides a method for online test and refrigerant recovery of the air conditioner indoor unit, and the air conditioner indoor unit is the indoor unit with the compressor built therein. The method comprises the following steps: 1, connecting the indoor unit with the test tool provided by the invention in order to perform online test on the indoor unit; and 2, reversing the four-way valve after the online test is completed, so that the residual refrigerant in the indoor unit is recovered by the compressor to the condenser unit of the test tool. The test tool provided by the invention not only realizes the online test of the indoor unit, but can also recovers the refrigerant in the indoor unit, in addition, the refrigerant recovery cost is low as the fluorine recovery machine is not used.