Abstract: A throttling device, including a tank for accommodating liquid refrigerant, with an orifice plate arranged at an outlet of the tank; a floating ball capable of floating on a liquid surface of the refrigerant; a pivot rod pivotally fixed on the tank through a pivot shaft; a connecting rod, with one end thereof fixedly connected with the floating ball, and the other end thereof fixedly connected with the pivot rod; a valve plate fixed on the pivot rod and located near an orifice of the orifice plate, wherein the valve plate is capable of adjusting a flow area of the orifice under the action of the pivot rod; and a limit piece located above the valve plate and being movable to limit the valve plate.

Abstract: This application provides a refrigerating system including a first throttling device control mode setting module and a first throttling device control module. The first throttling device control mode setting module receives at least one parameter associated with operation of a compressor, determines whether the at least one parameter indicates that the compressor is under a preset surge protection condition, and selects between a normal control mode and a surge protection control mode based on the determination. The first throttling device control module controls the first throttling device in the normal control mode in response to the first throttling device control mode setting module selecting the normal control mode, and controls the first throttling device in the surge protection control mode in response to the first throttling device control mode setting module selecting the surge protection control mode.

Abstract: The present application provides a water source heat pump system including a first unit and a second unit. The first unit includes a first compressor, a first condenser and a first evaporator. The second unit includes a second compressor, a second condenser and a second evaporator. The first compressor, the first condenser and the first evaporator are in communication with each other to form a first refrigerant circuit, and the second compressor, the second condenser and the second evaporator are in communication with each other to form a second refrigerant circuit. A fluid pipeline in the first condenser and a fluid pipeline in the second condenser are connected in series to allow a heating fluid to pass through the second condenser and the first condenser in sequence. A fluid pipeline in the first evaporator and a fluid pipeline in the second evaporator are connected in series to allow a heat source fluid to pass through the first evaporator and the second evaporator in sequence.

Abstract: 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.

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: A heat exchange system and a method for reclaiming corrosion inhibitor in a heat exchange system are provided by the present disclosure. The heat exchange system includes a compressor (1), a condenser (2) and an evaporator (3) connected in sequence, and the heat exchange system further includes a system for reclaiming corrosion inhibitor which includes an ejector (6) including a high-pressure fluid inlet (61) connected to an outlet (11) of the compressor, a suction fluid inlet (62) connected to the heat exchange system to extract a liquid-state refrigerant in the heat exchange system, and a fluid outlet (63) leading to bearings of the compressor, wherein a pressurizing device (5) is provided between the outlet of the compressor and the high-pressure fluid inlet of the ejector. The heat exchange system according to the embodiments of the present disclosure can provide sufficient corrosion inhibitor to the bearings of the compressor under various working conditions.

Abstract: 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.

Abstract: 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.

Abstract: A refrigeration system, comprising a compressor, a condenser, a throttle flow path, and an evaporator connected in sequence, wherein a non-adjustable main throttle element is disposed in the throttle flow path; and further comprising a bypass flow path, wherein the bypass flow path is connected to the throttle flow path respectively at the upstream and downstream of the main throttle element, and provided with an adjustable auxiliary throttle element thereon; a liquid level sensor, disposed upstream and/or downstream of the throttle flow path, and configured to detect the liquid level; and a controller, wherein the controller is configured to control the opening of the auxiliary throttle element according to a liquid level signal from the liquid level sensor.

Abstract: A throttling device, including a tank for accommodating liquid refrigerant, with an orifice plate arranged at an outlet of the tank; a floating ball capable of floating on a liquid surface of the refrigerant; a pivot rod pivotally fixed on the tank through a pivot shaft; a connecting rod, with one end thereof fixedly connected with the floating ball, and the other end thereof fixedly connected with the pivot rod; a valve plate fixed on the pivot rod and located near an orifice of the orifice plate, wherein the valve plate is capable of adjusting a flow area of the orifice under the action of the pivot rod; and a limit piece located above the valve plate and being movable to limit the valve plate.

Abstract: A multi-stage refrigeration system (100) includes: a refrigeration loop (110), which includes a gas suction port of a multi-stage compressor (111), a condenser (112), a first throttling element (113), an evaporator (114) and an exhaust port of the multi-stage compressor which are sequentially connected through pipelines; an economizer branch (120), which includes an economizer (121), a second throttling element (122) and a first control valve (123), the economizer having an economizer liquid inlet connected to the condenser via the first throttling element, an economizer liquid outlet connected to the evaporator via the second throttling element, and an economizer exhaust port connected to an intermediate stage of the multi-stage compressor via a control valve; and a bypass branch (130), which is joined to the evaporator from the downstream of the second throttling element and connected to the condenser via the first throttling element, and on which a second control valve (131) is arranged.

Abstract: The present invention provides an economizer, including a housing having a first section and a second section; and a condenser outlet, an evaporator inlet, and a compressor intermediate-stage inlet that are disposed on the second section of the housing; wherein the first section has a contour matching a housing of a commonly used condenser, such that the first section can fit the housing of the condenser. The economizer of the present invention can better match an outer contour of a conventional condenser, so that the both can fit each other in arrangement as much as possible when applied to an overall layout of a refrigeration system, thereby significantly reducing a transverse space occupied by the refrigeration system.

Abstract: A refrigeration system, comprising a compressor, a condenser, a throttle flow path, and an evaporator connected in sequence, wherein a non-adjustable main throttle element is disposed in the throttle flow path; and further comprising a bypass flow path, wherein the bypass flow path is connected to the throttle flow path respectively at the upstream and downstream of the main throttle element, and provided with an adjustable auxiliary throttle element thereon; a liquid level sensor, disposed upstream and/or downstream of the throttle flow path, and configured to detect the liquid level; and a controller, wherein the controller is configured to control the opening of the auxiliary throttle element according to a liquid level signal from the liquid level sensor.

Abstract: A refrigeration system, includes a compressor, a condenser (200), a throttle flow path (100), and an evaporator (300) connected in sequence. A non-adjustable main throttle element (110,120) is disposed in the throttle flow path. A bypass flow path (500) is connected to the throttle flow path respectively at the upstream and downstream of the main throttle element, and provided with an adjustable auxiliary throttle element (510) thereon. A liquid level sensor is disposed upstream or downstream of the throttle flow path, and configured to detect the liquid level. A controller is configured to control the opening of the auxiliary throttle element according to a liquid level signal from the liquid level sensor.

Abstract: A heat exchange system and a method for reclaiming corrosion inhibitor in a heat exchange system are provided by the present disclosure. The heat exchange system includes a compressor (1), a condenser (2) and an evaporator (3) connected in sequence, and the heat exchange system further includes a system for reclaiming corrosion inhibitor which includes an ejector (6) including a high-pressure fluid inlet (61) connected to an outlet (11) of the compressor, a suction fluid inlet (62) connected to the heat exchange system to extract a liquid-state refrigerant in the heat exchange system, and a fluid outlet (63) leading to bearings of the compressor, wherein a pressurizing device (5) is provided between the outlet of the compressor and the high-pressure fluid inlet of the ejector. The heat exchange system according to the embodiments of the present disclosure can provide sufficient corrosion inhibitor to the bearings of the compressor under various working conditions.

Abstract: A multi-stage refrigeration system (100) includes: a refrigeration loop (110), which includes a gas suction port of a multi-stage compressor (111), a condenser (112), a first throttling element (113), an evaporator (114) and an exhaust port of the multi-stage compressor which are sequentially connected through pipelines; an economizer branch (120), which includes an economizer (121), a second throttling element (122) and a first control valve (123), the economizer having an economizer liquid inlet connected to the condenser via the first throttling element, an economizer liquid outlet connected to the evaporator via the second throttling element, and an economizer exhaust port connected to an intermediate stage of the multi-stage compressor via a control valve; and a bypass branch (130), which is joined to the evaporator from the downstream of the second throttling element and connected to the condenser via the first throttling element, and on which a second control valve (131) is arranged.

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 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.

Abstract: A refrigeration system, including: a compressor, a condenser, an economizer, a throttle valve, and an evaporator which are connected via a pipeline; and a pneumatic valve that includes a valve body and a drive gas phase refrigerant chamber, an gas phase refrigerant outlet of the economizer being connected to an interstage gas phase refrigerant inlet of the compressor via the valve body, and the drive gas phase refrigerant chamber being connected to a low pressure portion of the refrigeration system via a first gas phase refrigerant path, the lower pressure portion having a pressure lower than that in the economizer; wherein a first valve for controlling on/off of the first gas phase refrigerant path is disposed on the first gas phase refrigerant path. The refrigeration system can avoid liquid phase refrigerant accumulated in the economizer from entering the compressor during start to cause a liquid impact problem.

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.