Clothes treatment apparatus

Patent metadata

Field	Value
Publication number	US-11293134-B2
Application number	US-202016896796-A
Country	US
Kind code	B2
Filing date	Jun 9, 2020
Priority date	Aug 1, 2016
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

A clothes treatment apparatus, including a drum rotatably provided within a cabinet to accommodate washing and drying objects; and a heat pump including an evaporator, a compressor, a condenser, and an expansion valve, through which refrigerant is circulated, to provide heat to air discharged from the drum and circulated to the drum, wherein the heat pump further includes an internal heat exchanger configured to exchange heat between refrigerant discharged from the condenser and refrigerant passing through the evaporator.

First claim

What is claimed is:

1. A clothes treatment apparatus, comprising:
a drum rotatably provided within a cabinet; and
a heat pump including an evaporator, a compressor, a condenser, and an expansion valve, through which refrigerant is circulated to provide heat to air circulated through the drum,
wherein the heat pump further includes an internal heat exchanger provided within the evaporator,
wherein the internal heat exchanger includes an internal heat exchange pipe located between an air inlet of the evaporator and an air outlet thereof, and
the internal heat exchange pipe is above a refrigerant pipe of the evaporator, and
the internal heat exchanger includes a connection pipe to connect the condenser directly to the internal heat exchange pipe and to allow the refrigerant discharged from the condenser to pass to the internal heat exchange pipe, and
the internal heat exchanger is configured to exchange heat between the refrigerant passing along the connection pipe to the internal heat exchange pipe and refrigerant of the evaporator, and the internal heat exchange pipe is separated from the refrigerant pipe of the evaporator.

2. The clothes treatment apparatus of claim 1 , wherein the internal heat exchanger includes a fin-and-pipe type heat exchanger.

3. The clothes treatment apparatus of claim 1 , wherein the internal heat exchanger includes:
the internal heat exchange pipe located within the evaporator; and
the connection pipe connecting a refrigerant outlet of the condenser to the internal heat exchange pipe to introduce the refrigerant discharged from the condenser into the internal heat exchange pipe.

4. The clothes treatment apparatus of claim 3 , wherein the internal heat exchanger is provided at a downstream side of the evaporator with respect to a movement direction of the air.

5. The clothes treatment apparatus of claim 4 , wherein the internal heat exchanger shares at least one heat exchange fin with the evaporator to exchange heat between the refrigerant discharged from the condenser and the refrigerant of the evaporator through the at least one heat exchange fin.

6. The clothes treatment apparatus of claim 5 , wherein a refrigerant outlet of the evaporator is provided at a downstream side of the evaporator, and the internal heat exchanger exchanges heat between the refrigerant discharged from the condenser and refrigerant at an outlet side of the evaporator.

7. The clothes treatment apparatus of claim 3 , wherein the internal heat exchange pipe includes:
a plurality of straight pipes spaced apart in a first direction at a downstream side of the evaporator with respect to a movement direction of the air; and
a plurality of connection pipes protruding from at least one heat exchange fin of the evaporator to connect ends of two straight pipes adjacent to each other among the plurality of straight pipes.

8. The clothes treatment apparatus of claim 7 , wherein the plurality of straight pipes are provided in a last row at the downstream side of the evaporator with respect to the movement direction of the air.

9. The clothes treatment apparatus of claim 8 , wherein the plurality of straight pipes are provided in a first part of the last row of the evaporator, and the refrigerant pipe of the evaporator is located in a second part of the last row of the evaporator, wherein the first part of the last row of the evaporator is above the second part of the last row of the evaporator.

10. The clothes treatment apparatus of claim 9 , wherein the plurality of straight pipes are above the refrigerant pipe of the evaporator.

11. The clothes treatment apparatus of claim 8 , wherein the plurality of straight pipes are further arranged in a row upstream from the last row of the evaporator.

12. The clothes treatment apparatus of claim 7 , wherein a total number of internal heat exchanger pipes is ⅕ to ⅓ of a total number of refrigerant pipes of the evaporator.

13. The clothes treatment apparatus of claim 7 , wherein the plurality of straight pipes is adjacent to a refrigerant outlet of the evaporator.

14. The clothes treatment apparatus of claim 7 , wherein the plurality of straight pipes is adjacent to a refrigerant inlet of the evaporator.

15. A clothes treatment apparatus, comprising:
a tub provided within a cabinet;
a drum rotatably provided within the tub; and
a heat pump including an evaporator, a compressor, a condenser, and an expansion valve, through which refrigerant is circulated to provide heat to air circulated through the drum,
wherein the heat pump further includes:
a heat exchange duct configured to accommodate the evaporator and the condenser and connected to the tub to form a flow path to circulate the air; and
an internal heat exchanger provided within the evaporator, the internal heat exchanger including an internal heat exchange pipe extending from the condenser to an inside of the evaporator to exchange heat between the internal heat exchange pipe and a refrigerant pipe of the evaporator within the evaporator, wherein the internal heat exchange pipe is separated from the refrigerant pipe of the evaporator,

wherein the internal heat exchange pipe is located between an air inlet of the evaporator and an air outlet thereof, and
the internal heat exchange pipe is above the refrigerant pipe of the evaporator.

16. The clothes treatment apparatus of claim 15 , wherein the internal heat exchanger includes a connection pipe connecting a refrigerant outlet pipe of the condenser and the internal heat exchange pipe to introduce refrigerant discharged from the condenser into the internal heat exchange pipe, and
the internal heat exchanger is configured to exchange heat between the refrigerant passing along the connection pipe to the internal heat exchange pipe and refrigerant within the refrigerant pipe of the evaporator.

17. The clothes treatment apparatus of claim 16 , wherein the heat pump further includes:
a suction fan provided at a first side of the heat exchange duct to introduce air discharged from the drum into the drum through the evaporator and the condenser to circulate the air.

18. The clothes treatment apparatus of claim 16 , wherein the heat exchange duct is arranged at an upper portion and a front side of the tub, and the evaporator and the condenser are sequentially formed in a lateral direction from a center line in a vertical direction of the tub and spaced apart from each other in the lateral direction.

19. The clothes treatment apparatus of claim 18 , wherein a lower side of the condenser extends in a downward direction to be below a lower side of the evaporator.

20. The clothes treatment apparatus of claim 18 , wherein an air inlet side of the heat exchange duct is communicably connected to an upper left rear side of the tub, and an air outlet side of the heat exchange duct is communicably connected to an upper right front side of the tub, and a movement direction of the air is directed from a left rear side of the tub to a right front side of the tub.

21. The clothes treatment apparatus of claim 20 , wherein the condenser is provided at a downstream side of the evaporator with respect to the movement direction of the air, and the refrigerant of the condenser flows in a direction opposite to the movement direction of the air.

22. The clothes treatment apparatus of claim 21 , wherein the internal heat exchange pipe is arranged in one row or two rows at the downstream side of the evaporator with respect to the movement direction of the a

Assignees

• Lg Electronics Inc

Inventors

• Hong Sogkie
• Ko Cheolsoo
• Kim Hyeonjoong
• Kim Hyojun

Classifications

• D06F2105/30

  Blowers · CPC title

• D06F58/04

  Details  (controlling or regulating devices D06F34/00) · CPC title

• D06F58/24

  Condensing arrangements · CPC title

• D06F58/206 Primary

  Heat pump arrangements · CPC title

• D06F2105/28

  Electric heating · CPC title