Abstract: A refrigeration system and a lubricating method thereof. The refrigeration system (100) includes: a compressor (110), a condenser (120), an evaporator (130), and a lubrication circuit (200), the lubrication circuit including a post-lubrication flow path (230,240,260) connected from the compressor into the condenser and the evaporator respectively; and a pre-lubrication flow path (210,220,250) connected from the condenser and the evaporator into the compressor respectively; wherein after flowing from the condenser via the pre-lubrication flow path to the compressor for lubrication, a part of refrigerant for lubrication can flow back to the evaporator via the post-lubrication flow path; or after flowing from the evaporator via the pre-lubrication flow path to the compressor for lubrication, the part of refrigerant for lubrication can flow back to the condenser via the post-lubrication flow path.

Abstract: The present utility model relates to a deflector for a condenser. The condenser has an inlet in communication with a compressor, and a deflector for guiding a refrigerant gas flow from the compressor is arranged in the condenser and at a position close to the inlet. The deflector is provided with a deflecting structure projecting toward the inlet, and the deflecting structure is configured as impermeable to the refrigerant gas flow. The present utility model further provides a condenser having the deflector for a condenser and a refrigeration system equipped with the condenser. The deflector for a condenser according to the present utility model not only can alleviate the impact of high-temperature high-pressure gas from the compressor but also can reduce noise and vibration.

Abstract: A refrigeration system, including: an electronic control unit, including a housing and an electronic device arranged in the housing; a refrigeration loop, including a compressor, a condenser, a primary throttling element, and an evaporator sequentially connected through a pipeline and forming a closed loop; and an electronic device cooling branch connected into the refrigeration loop from the condenser, and connected back to the refrigeration loop from the evaporator; the electronic device cooling branch including an electronic device cooling unit, a secondary throttling element, and an electromagnetic valve; and the electronic device cooling unit being arranged in the housing and spaced apart from the electronic device, for reducing the temperature and humidity of the electronic device and an environment in the housing.

Abstract: The present invention provides a refrigerating system, including: a refrigerating loop (100), including a compressor (190), a condenser (110), a main throttling element (180), and an evaporator (120) that are connected in sequence through a pipeline; and a purification loop (200), including a purification compressor (210), a purification condenser (220), a purification throttling element (240), and a low-temperature separator (230) that are connected in sequence through a pipeline, the purification loop being bidirectionally connected to the refrigerating loop through the low temperature separator and configured to separate a non-condensable gas in the refrigerating loop; wherein the purification condenser is capable of exchanging heat with a refrigerant in the refrigerating loop. Thus, efficient and reliable separation of the refrigerant and the non-condensable gas is achieved.

Abstract: A heating, ventilation and air conditioning (HVAC) system includes a compressor, a condenser operably connected to the compressor, and an evaporator operably connected to the compressor and to the condenser. A relocatable interface panel is in operable communication with one or more components of the HVAC system to issue commands to the HVAC system via operator inputs at the interface panel. An electrical lead connects the interface panel to the one or more components. A plurality of installation points are located at the HVAC system for installation of the interface panel thereto. The interface panel is selectably installed to an installation point of the plurality of installation points at an installation site of the HVAC system.

Abstract: The present invention provides a refrigerating system, including: a refrigerating loop, including a compressor, a condenser, a throttling element, and an evaporator that are connected in sequence through a pipeline; and a purification loop, connected to the refrigerating loop and configured to separate a pressure maintaining gas in the refrigerating loop; wherein the refrigerating loop is connected into the purification loop from the top of the condenser or the top of the compressor. The present invention further provides a purification method for a refrigerating system, including: in a first time period, performing S1: charging, into the refrigerating system, a refrigerant that satisfies a designed refrigerating capacity; and S2: charging a pressure maintaining gas into the refrigerating system, so that pressure in the refrigerating system is higher than atmospheric pressure; and in a second time period, performing S3: separating and discharging the pressure maintaining gas in the refrigerating system.

Abstract: A purge system for removing contamination from a chiller system includes a purge chamber including a degassing membrane, the degassing membrane dividing the purge chamber into an inlet portion and an outlet portion, the inlet portion for fluid communication with the chiller system, the degassing membrane to pass contamination from the inlet portion to the outlet portion; a valve coupled to the outlet portion of the purge chamber, the valve providing an exit for contamination from the outlet portion of the purge chamber; and a controller to open or close the valve in response to pressure in the outlet portion of the purge chamber.

Abstract: Disclosed is a refrigeration system including a heat transfer fluid circulation loop configured to allow a refrigerant to circulate therethrough. A purge gas outlet is in operable communication with the heat transfer fluid circulation loop. The system also includes at least one gas permeable membrane having a first side in operable communication with the purge gas outlet and a second side. The membrane includes a porous inorganic material with pores of a size to allow passage of contaminants through the membrane and restrict passage of the refrigerant through the membrane. The system also includes a permeate outlet in operable communication with a second side of the membrane.

Abstract: A flange cover mounting and dismounting device, which comprises: a base part, comprising a fastener element with a fastener hole array, and being fastened on a flange cover mounting surface by the fastener hole array; and a jib arm assembly, having a first end being pivotally connected to the fastener element, and a second end being connected to the flange cover. The flange cover mounting and dismounting device can be fixed to the flange cover mounting surface having a corresponding fastener hole array, which is convenient for mounting and dismounting a flange cover. In addition, under most circumstances, the fastener hole array on the flange cover mounting surface is intrinsically owned by the devices, which originally can be applied to connect modules of each device or used for other applications.

Abstract: A refrigeration system, including: an electronic control unit, including a housing and an electronic device arranged in the housing; a refrigeration loop, including a compressor, a condenser, a primary throttling element, and an evaporator sequentially connected through a pipeline and forming a closed loop; and an electronic device cooling branch connected into the refrigeration loop from the condenser, and connected back to the refrigeration loop from the evaporator; the electronic device cooling branch including an electronic device cooling unit, a secondary throttling element, and an electromagnetic valve; and the electronic device cooling unit being arranged in the housing and spaced apart from the electronic device, for reducing the temperature and humidity of the electronic device and an environment in the housing.

Abstract: A heating, ventilation and air conditioning (HVAC) system includes a compressor, a condenser operably connected to the compressor, and an evaporator operably connected to the compressor and to the condenser. A relocatable interface panel is in operable communication with one or more components of the HVAC system to issue commands to the HVAC system via operator inputs at the interface panel. An electrical lead connects the interface panel to the one or more components. A plurality of installation points are located at the HVAC system for installation of the interface panel thereto. The interface panel is selectably installed to an installation point of the plurality of installation points at an installation site of the HVAC system.

Abstract: A purge system for removing contamination from a chiller system includes a purge chamber including a degassing membrane, the degassing membrane dividing the purge chamber into an inlet portion and an outlet portion, the inlet portion for fluid communication with the chiller system, the degassing membrane to pass contamination from the inlet portion to the outlet portion; a valve coupled to the outlet portion of the purge chamber, the valve providing an exit for contamination from the outlet portion of the purge chamber; and a controller to open or close the valve in response to pressure in the outlet portion of the purge chamber.

Abstract: A variable frequency drive system including an alternating current electrical power source, an alternating current motor and a variable frequency drive connected to the power source and the motor. The variable frequency drive provides electrical power to the motor, and includes an active rectifier to convert a first alternating current from the power source to a direct current and an inverter to convert the direct current to a second alternating current. A variable frequency drive output voltage is greater than a variable frequency drive input voltage, compensating for the motor apparent current. A method of electrical power conversion includes urging a first alternating current from a power source to a variable frequency drive. The first alternating current is converted to direct current via an active rectifier of the variable frequency drive, and the direct current is converted to a second alternating current via an inverter of the variable frequency drive.

Abstract: A dual refrigeration circuit, watercooled chiller has its respective evaporators and condensers interconnected by waterboxes, with each waterbox having an inlet flow and outlet flow connection, and with three passages interconnected with the respective evaporators/condensers of the first and second circuit, and with each of the condensers/evaporators having return bends at their ends to provide a two-pass flow arrangement. The flow in the condenser waterbox passes into a first passage and then in one direction to the condenser of one circuit while the flow into the evaporator waterbox passes into a first passage and then in the opposite direction to one of the circuit evaporators. In this manner, a series counterflow arrangement with two water passes is achieved.

Abstract: A dual refrigerant circuit chiller (10) has a first refrigerant circuit (100) including a first condenser (130) and a first evaporator (140), a second refrigerant circuit (200) including a second condenser (230) and a second evaporator (240), a condenser assembly (30) including the first condenser (130) and the second condenser (230) interconnected in a series cooling fluid circuit, and an evaporator assembly (40) including the first evaporator (140) and the second evaporator (240) interconnected in a series fluid circuit with a waterbox (50) disposed intermediate the first evaporator (140) and the second evaporator (240). The evaporator assembly (40) has a chilled fluid inlet (45) and a chilled fluid outlet (43) that are disposed at opposite longitudinal ends of the evaporator assembly (40). Each of the first and second evaporators (140, 240) embodies a multiple pass circuit fluid-to-refrigerant heat exchanger.

Abstract: A compression machine includes a refrigerant condenser, an expansion device, a refrigerant evaporator, a first compressor and a second compressor. Each compressor is arranged to receive lower pressure refrigerant vapor from the evaporator and to deliver higher pressure vapor to the condenser independently of the other compressor. The first compressor operates when the compression machine is operating in a first duty mode, for example a water-cooling mode. The second compressor operates when the compression machine is operating in a second duty mode, for example one of a water-heating mode or a brine cooling. The first compressor is selected for optimal performance in the first duty only and the second compressor is selected for optimal performance in the second duty mode only.

Abstract: A dual refrigeration circuit watercooled chiller has its respective evaporators and condensers interconnected by waterboxes such that the first circuit tubes discharge into the respective waterbox and the flow of water then passes from the respective waterboxes to the respective evaporator/condenser tubes of the second circuit. Instrumentation is attached to the waterboxes to enable the measurement of the leaving temperature differential to provide improved control. Since the first and second circuit tubes are separate and independent, both serviceability and flexibility in design are substantially enhanced.

Abstract: A dual refrigeration circuit, watercooled chiller has its respective evaporators and condensers interconnected by waterboxes, with each waterbox having an inlet flow and outlet flow connection, and with three passages interconnected with the respective evaporators/condensers of the first and second circuit, and with each of the condensers/evaporators having return bends at their ends to provide a two-pass flow arrangement. The flow in the condenser waterbox passes into a first passage and then in one direction to the condenser of one circuit while the flow into the evaporator waterbox passes into a first passage and then in the opposite direction to one of the circuit evaporators. In this manner, a series counterflow arrangement with two water passes is achieved.

Abstract: Related components of a refrigeration system are cooled by refrigerant drawn from the system condenser by a pump which serves to raise the pressure of the condensate and move the condensate through the system related component. The condensate is reduced to a vapor as it absorbs parasitic heat losses in the components and is returned to the condenser where the parasitic heat losses are carried out of the system by the condenser coolant so that the system performance is not adversely effected.

Abstract: Apparatus for cooling the power electronics components of a variable frequency drive for the motor of a refrigerant system compressor. The components are mounted upon a heat sink and refrigerant from the system condenser is passed through the heat sink by means of a flow line and returned to the low pressure side of the system. A control valve is mounted in the flow line which throttles refrigerant passing through the line to produce cooling of the heat sink to maintain the temperature of the components within a desired range.