Laundry treatment apparatus and method for operating the same

Patent metadata

Field	Value
Publication number	US-12247345-B2
Application number	US-202117217614-A
Country	US
Kind code	B2
Filing date	Mar 30, 2021
Priority date	Mar 30, 2020
Publication date	Mar 11, 2025
Grant date	Mar 11, 2025

Abstract

A laundry treatment apparatus includes a cabinet, a condensed water collector that is disposed in the cabinet and defines a collection space configured to receive condensed water therein, a discharge pump assembly disposed at the condensed water collector and configured to pump the condensed water from the condensed water collector, a water discharge container configured to receive the condensed water collector pumped from the condensed water collector, and a sterilization module configured to sterilize the condensed water in the condensed water collector.

First claim

What is claimed is:

1. A laundry treatment apparatus comprising:
a cabinet;
a heat pump configured to heat air for drying laundry and to condense moisture from the air that is used for drying the laundry;
a circulation fan configured to circulate the air;
a condensed water collector that is disposed in the cabinet and defines a collection space configured to receive condensed water therein;
a discharge pump assembly comprising a discharge pump that is disposed at the condensed water collector and configured to pump the condensed water from the condensed water collector;
a water discharge container configured to receive the condensed water pumped from the condensed water collector;
a sterilization module configured to sterilize the condensed water in the condensed water collector by irradiating ultraviolet light; and
a controller configured to control the heat pump, the circulation fan, the discharge pump assembly, and the sterilization module,
wherein the controller is configured to:
operate the discharge pump to circulate the condensed water in the condensed water collector, and
control the sterilization module to irradiate the ultraviolet light to the condensed water circulated by operating the discharge pump.

2. The apparatus of claim 1 , wherein the discharge pump assembly further comprises a pump cover that covers the condensed water collector, and
wherein the sterilization module is disposed at the pump cover.

3. The apparatus of claim 2 , wherein the pump cover defines a light-transmitting hole through the pump cover, and
wherein the sterilization module is configured to provide light to the condensed water in the condensed water collector through the light-transmitting hole.

4. The apparatus of claim 3 , wherein the light-transmitting hole passes through a top surface of the pump cover, and
wherein the sterilization module is disposed on an outer side of the top surface of the pump cover.

5. The apparatus of claim 4 , wherein the light-transmitting hole is defined at a position of the top surface of the pump cover to thereby face the condensed water flowing into the condensed water collector.

6. The apparatus of claim 4 , wherein the sterilization module comprises a circuit board and a light emitting diode (LED) mounted on the circuit board, the LED being configured to emit ultraviolet light.

7. The apparatus of claim 6 , wherein the sterilization module further comprises:
a casing that defines an installation space accommodating the circuit board, and an irradiation hole at a bottom surface of the casing, the irradiation hole being in communication with the light-transmitting hole;
a transmissive window that is disposed at the bottom surface of the casing and covers the irradiation hole; and
a sealing that couples the transmissive window to the casing.

8. The apparatus of claim 7 , wherein a bottom surface of the sealing covers a portion of the top surface of the pump cover and surrounds the light-transmitting hole, the sealing being configured to block introduction of the condensed water through the light-transmitting hole.

9. The apparatus of claim 8 , wherein the bottom surface of the sealing defines a communication-hole that is in communication with the irradiation hole and the light-transmitting hole.

10. The apparatus of claim 9 , wherein the bottom surface of the sealing defines a recess that surrounds the communication-hole and receives the transmissive window.

11. The apparatus of claim 10 , wherein a recess depth of the recess is greater than a thickness of the transmissive window.

12. The apparatus of claim 7 , wherein the sealing has a circular ring shape and defines a communication-hole at a center of the sealing.

13. The apparatus of claim 12 , wherein a bottom surface of the sealing defines at least one of a circular concave pattern or a circular convex pattern that surrounds the communication-hole.

14. The apparatus of claim 7 , wherein the casing is fastened to the top surface of the pump cover by a screw or a bolt.

15. The apparatus of claim 4 , further comprising a collection port disposed on the top surface of the pump cover and configured to collect water overflown from the water discharge container, and
wherein the light-transmitting hole is located adjacent to the collection port.

16. The apparatus of claim 1 , wherein the sterilization module comprises a circuit board and an LED mounted on the circuit board, the LED being configured to emit ultraviolet light.

17. A laundry treatment apparatus comprising:
a heat pump configured to heat air for drying laundry and to condense moisture from the air that is used for drying the laundry;
a circulation fan configured to circulate the air;
a condensed water collector configured to receive condensed water from the heat pump;
a discharge pump configured to pump the condensed water from the condensed water collector;
a sterilization module configured to irradiate ultraviolet light to the condensed water in the condensed water collector; and
a controller configured to control the heat pump, the circulation fan, the discharge pump, and the sterilization module,
wherein the controller is configured to:
activate the heat pump and the circulation fan,
deactivate the heat pump and the circulation fan,
operate the discharge pump to circulate the condensed water in the condensed water collector, and
control the sterilization module to irradiate the ultraviolet light to the condensed water circulated by operating the discharge pump.

18. The apparatus of claim 17 , wherein the controller is configured to activate the sterilization module to irradiate the ultraviolet light before deactivating the heat pump and the circulation fan.

19. The apparatus of claim 17 , wherein the controller is configured to alternately activate and deactivate the discharge pump.

20. The apparatus of claim 19 , wherein the controller is configured to set an activation duration for operating the discharge pump and a deactivation duration for stopping operation of the discharge pump, and
wherein the activation duration is less than the deactivation duration.

Assignees

• Lg Electronics Inc

Inventors

• Lee Kwangjo
• Jeong Gayeong
• Joo Hyojin
• Choi Jangan

Classifications

• D06F39/06

  Arrangements for preventing or destroying scum · CPC title

• D06F39/20

  Arrangements for water recovery · CPC title

• D06F25/00

  Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air  (control of washing or of washing and drying D06F33/00, D06F34/00; domestic laundry dryers D06F58/00) · CPC title

• D06F33/69

  Control of cleaning or disinfection of washer-dryer parts, e.g. of tubs · CPC title

• D06F58/206

  Heat pump arrangements · CPC title