US 4,084,405 AGranted

Refrigerating system

AssigneeSvenska Rotor Maskiner Aktiebolag

InventorsHjalmar Schibbye, Tord Holmstrom

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Abstract

A refrigerating system comprises a liquid refrigerant supply line connecting the outlet of a condensor with a throttle valve connected to the inlet of an evaporator, a first liquid refrigerant receiver tank intermittently disconnected from the supply line and connected to a special suction line for performing a liquid refrigerant precooling sequence by drawing vapor from the receiver tank during time periods when the refrigerating cycle is continuously maintained via an additional receiver tank connected between the condensor and the throttle valve.

Claims11

Dependent claims

A refrigerating system comprising:

an evaporator (6) having an inlet and an outlet;
a condenser (2) having an inlet and an outlet;
a compressor device (1), the output of which is coupled to said condenser inlet;
a supply line (5) coupled to said inlet of said evaporator (6);
a throttle valve (V3) located in said supply line (5) to said inlet of said evaporator (6);
a closed receiver tank (3) containing a liquid refrigerant and having an inlet and an outlet;
an inlet valve (V1;
V11) coupling an inlet of said closed receiver tank (3) to said outlet of said condenser (2);
an outlet valve (V2;
V21) coupling an outlet of said closed receiver tank (3) to said supply line (5) for said evaporator (6);
control means (12;
121) coupled to said closed receiver tank (3) for controlling the amount of liquid refrigerant in said closed receiver tank (3), said control means being further controllably coupled to said inlet and outlet valves for controlling the operation of said inlet and outlet valves;
said compressor device (1) including a first inlet channel (7) permanently communicating with said outlet of said evaporator (6), and an additional inlet channel (9);
means including an additional valve (V4;
V41) coupling said additional inlet channel (9) of said compressor device (1) to the top of said closed receiver tank (3), said additional valve (V4;
V41) being coupled to said control means (12;
121);
said control means (12;
121) controlling said valves (V1, V2, V4;
V11, V21, V41) for intermittent disconnection of said closed receiver tank (3) from said condenser (2) and evaporator (6) and corresponding intermittent connection of the top of said closed receiver tank (3) to said additional inlet channel (9) for a time interval;
and
an additional receiver tank (4) containing a controlled amount of liquid refrigerant coupled to said condenser (2) and further coupled to said evaporator (6) for feeding said evaporator (6) under the influence of the condenser pressure supplied to said additional receiver tank (4), thereby maintaining the refrigerating cycle during said intermittent time interval.

19 more elements

Dependencies are inferred from the claim text.

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Abstract

A refrigerating system comprising:

an evaporator (6) having an inlet and an outlet;
a condenser (2) having an inlet and an outlet;
a compressor device (1), the output of which is coupled to said condenser inlet;
a supply line (5) coupled to said inlet of said evaporator (6);
a throttle valve (V3) located in said supply line (5) to said inlet of said evaporator (6);
a closed receiver tank (3) containing a liquid refrigerant and having an inlet and an outlet;
an inlet valve (V1;
V11) coupling an inlet of said closed receiver tank (3) to said outlet of said condenser (2);
an outlet valve (V2;
V21) coupling an outlet of said closed receiver tank (3) to said supply line (5) for said evaporator (6);
control means (12;
121) coupled to said closed receiver tank (3) for controlling the amount of liquid refrigerant in said closed receiver tank (3), said control means being further controllably coupled to said inlet and outlet valves for controlling the operation of said inlet and outlet valves;
said compressor device (1) including a first inlet channel (7) permanently communicating with said outlet of said evaporator (6), and an additional inlet channel (9);
means including an additional valve (V4;
V41) coupling said additional inlet channel (9) of said compressor device (1) to the top of said closed receiver tank (3), said additional valve (V4;
V41) being coupled to said control means (12;
121);
said control means (12;
121) controlling said valves (V1, V2, V4;
V11, V21, V41) for intermittent disconnection of said closed receiver tank (3) from said condenser (2) and evaporator (6) and corresponding intermittent connection of the top of said closed receiver tank (3) to said additional inlet channel (9) for a time interval;
and
an additional receiver tank (4) containing a controlled amount of liquid refrigerant coupled to said condenser (2) and further coupled to said evaporator (6) for feeding said evaporator (6) under the influence of the condenser pressure supplied to said additional receiver tank (4), thereby maintaining the refrigerating cycle during said intermittent time interval.

19 more elements