Refrigerator

Patent metadata

Field	Value
Publication number	US-10921040-B2
Application number	US-201816204824-A
Country	US
Kind code	B2
Filing date	Nov 29, 2018
Priority date	Dec 13, 2017
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A refrigerator includes a compressor, a condenser, a first evaporator connected with a first evaporator inlet path and a first evaporator outlet path, a second evaporator connected with a second evaporator inlet path and a second evaporator outlet path, a third evaporator connected with a third evaporator inlet path and a third evaporator outlet path, a path switching device, and a controller for controlling the compressor and the path switching device based on at least one mode.

First claim

What is claimed is:

1. A refrigerator comprising:
a main body including a first storage chamber, a second storage chamber and a third storage chamber;
a compressor connected with a compressor suction path and a compressor discharge path;
a condenser connected with the compressor discharge path and a condenser outlet path; a first evaporator to cool the first storage chamber and connected with a first evaporator inlet path and a first evaporator outlet path;
a second evaporator to cool the second storage chamber and connected with a second evaporator inlet path and a second evaporator outlet path;
a third evaporator to cool the third storage chamber and connected with a third evaporator inlet path and a third evaporator outlet path;
a valve connected with the condenser outlet path and the first evaporator inlet path, the second evaporator inlet path and the third evaporator inlet path; and
a controller to control the compressor and the valve based on at least one mode,
wherein:
the first evaporator inlet path is directly connected to the valve and the first evaporator outlet path is directly connected to the compressor suction path downstream of the third evaporator,
the second evaporator inlet path is directly connected to the valve and the second evaporator outlet path is directly connected to the first evaporator inlet path, and
the third evaporator inlet path is directly connected to the valve and the third evaporator outlet path is directly connected to the compressor suction path.

2. The refrigerator of claim 1 , further comprises:
a first storage chamber fan;
a second storage chamber fan;
a third storage chamber fan; and
a condenser fan.

3. The refrigerator of claim 1 ,
wherein a maximum target temperature of the third storage chamber is lower than each of a maximum target temperature of the first storage chamber and a maximum target temperature of the second storage chamber.

4. The refrigerator of claim 1 , further comprises a check valve to prevent refrigerant of the compressor suction path from flowing back to the third evaporator.

5. The refrigerator of claim 1 ,
wherein the second storage chamber is located between the first storage chamber and the third storage chamber.

6. The refrigerator of claim 1 , wherein a difference between a target temperature upper-limit value and a target temperature lower-limit value of each of the first storage chamber and the second storage chamber is less than a difference between a target temperature upper-limit value and a target temperature lower-limit value of the third storage chamber.

7. The refrigerator of claim 1 , wherein the controller selectively performs:
a first mode to control the valve in a second evaporator supply mode such that refrigerant is supplied to both the first evaporator and the second evaporator;
a second mode to control the valve in a first evaporator supply mode such that the refrigerant is supplied to the first evaporator; and
a third mode to control the valve in a third evaporator supply mode such that refrigerant is supplied to the third evaporator.

8. The refrigerator of claim 7 , wherein the controller:
performs the first mode until a temperature of the second storage chamber is satisfied;
performs the second mode until a temperature of the first storage chamber is satisfied, after the temperature of the second storage chamber is satisfied; and
performs the third mode until a temperature of the third storage chamber is satisfied, after the temperature of the first storage chamber is satisfied.

9. The refrigerator of claim 7 , wherein the controller:
starts the first mode if the temperature of the second storage chamber is dissatisfied; and
ends the first mode if the temperature of the second storage chamber is satisfied.

10. The refrigerator of claim 7 , wherein the controller:
starts the second mode if the temperature of the first storage chamber is dissatisfied; and
ends the second mode if the temperature of the first storage chamber is satisfied.

11. The refrigerator of claim 7 , wherein the controller terminates the third mode and resumes the first mode, if the temperature of the third storage chamber is satisfied and the temperature of the second storage chamber is dissatisfied in the third mode.

12. The refrigerator of claim 7 , wherein, in the first mode, the controller drives the compressor, the first storage chamber fan, the second storage chamber fan, and the condensing fan, and does not drive the third storage chamber fan.

13. The refrigerator of claim 7 , wherein, in the second mode, the controller drives the compressor, the first storage chamber fan, and the condensing fan, and does not drive the second storage chamber fan and the third storage chamber fan.

14. The refrigerator of claim 7 , wherein, in the third mode, the controller drives the compressor, the third storage chamber fan, and the condensing fan, and does not drive the first storage chamber fan and the second storage chamber fan.

15. The refrigerator of claim 7 , wherein the controller terminates the third mode and stops the compressor and the third storage chamber fan when the temperature of the third storage chamber is satisfied and the temperature of the second storage chamber is satisfied in the third mode.

16. The refrigerator of claim 1 , wherein a temperature range of the second storage chamber is equal to or lower than that of the first storage chamber and is higher than that of the third storage chamber.

17. The refrigerator of claim 16 ,
wherein a temperature range of the first storage chamber is 12 C to 18 C,
a temperature range of the second storage chamber is 12 C to 18 C or 6 C to 11 C, and
a temperature range of the third storage chamber is 0 C to 7 C or −2 C to 0 C or −24 C to −16 C.

18. The refrigerator of claim 1 , further comprises a heater to defrost the third evaporator.

19. The refrigerator of claim 18 , wherein in a defrosting mode, the controller drives the heater and the third storage chamber fan while the compressor is operated.

20. A refrigerator comprising:
a main body including a first storage chamber, a second storage chamber and a third storage chamber;
a compressor connected with a compressor suction path and a compressor discharge path;
a condenser connected with the compressor discharge path and a condenser outlet path;
a first evaporator to cool the first storage chamber and connected with a first evaporator inlet path and a first evaporator outlet path being connected to the compressor suction path;
a second evaporator to cool the second storage chamber and connected with a second evaporator inlet path and a second evaporator outlet path being connected to the first evaporator inlet path;
a third evaporator to cool the third storage chamber and connected with a third evaporator inlet path and a third evaporator outlet path being connected to the compressor suction path;
a valve connected with the condenser outlet path and the first evaporator inlet path, the second evaporator inlet path and the third evaporator inlet path; and
a controller to control the compressor and the valve based on at least one mode,
wherein the controller selectively performs:
a first mode to control the valve in a second evaporator supply mode such that refrigerant is supplied to both the first evaporator and the second evaporator;
a second mode to control the valve in a first evaporator supply mode such that the refrigerant is supplied to the first evaporator; and
a third mode to control the

Assignees

• Lg Electronics Inc

Inventors

• Chung Myungjin
• Kim Kyungseok
• Kim Kyeongyun
• Seong Giseok

Classifications

• F25B41/20

  Disposition of valves, e.g. of on-off valves or flow control valves (expansion valves F25B41/31) · CPC title

• F25D11/022 Primary

  with two or more evaporators · CPC title

• F25B5/02

  arranged in parallel · CPC title

• F25D29/00

  Arrangement or mounting of control or safety devices · CPC title

• F25D19/006

  Thermal coupling structure or interface · CPC title