The present invention provides an economizer component, including: a housing; an economizer chamber and an inter-stage flow path chamber, formed inside the housing by using a separator; a condenser connecting port and an evaporator connecting port, disposed on the economizer chamber; a first connecting port and a second connecting port, connected in a multi-stage compressor unit and disposed on the inter-stage flow path chamber; and the economizer chamber being in fluid connection with the inter-stage flow path chamber inside the housing. The economizer component provided in the present invention can reduce complexity of pipe passages of a refrigeration system in which the economizer component is applied.

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.

The present invention provides 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 air chamber, an air outlet of the economizer being connected to an interstage air inlet of the compressor via the valve body, and the drive air chamber being connected to a low pressure portion of the refrigeration system via a first air 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 air path is disposed on the first air 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.

The present invention provides an economizer component, including: a housing; an economizer chamber and an inter-stage flow path chamber, formed inside the housing by using a separator; a condenser connecting port and an evaporator connecting port, disposed on the economizer chamber; a first connecting port and a second connecting port, connected in a multi-stage compressor unit and disposed on the inter-stage flow path chamber; and the economizer chamber being in fluid connection with the inter-stage flow path chamber inside the housing. The economizer component provided in the present invention can reduce complexity of pipe passages of a refrigeration system in which the economizer component is applied.

A method of maintaining a fluid flow rate in a heating, ventilating, air conditioning, and refrigeration (HVAC-R) system while maintaining superheat in the HVAC-R system at a desired level includes: continuously measuring an operating fluid temperature of the HVAC-R system, continuously calculating HVAC-R system superheat at a pre-determined rate, determining if the calculated HVAC-R system superheat is stable, measuring and recording the operating fluid pressure of the HVAC-R system each time the calculated HVAC-R system superheat is stable, recording an average operating fluid pressure each subsequent time the superheat is stable, calculating an output PWM according to the equation: Output PWM=(Flow Rate Component)+(Superheat Component), and reducing fluid flow through a metering valve in the HVAC-R system when an actual HVAC-R system PWM is greater than the calculated output HVAC-R system PWM by adjusting a PWM signal to a microvalve in the metering valve, and increasing fluid flow through the metering valve in the HVAC-R system when the actual HVAC-R system PWM is less than the calculated output HVAC-R system PWM by adjusting the PWM signal to the microvalve in the metering valve.

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.

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.

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.