WO2020032714A1

WO2020032714A1 - Dishwasher

Info

Publication number: WO2020032714A1
Application number: PCT/KR2019/010115
Authority: WO
Inventors: 김대규; 김승훈; 김일환; 윤상헌
Original assignee: 엘지전자 주식회사
Priority date: 2018-08-10
Filing date: 2019-08-09
Publication date: 2020-02-13
Also published as: KR20200018014A; KR102541159B1; US20210186299A1

Abstract

The present invention relates to a dishwasher. The dishwasher according to the present invention comprises: a tub for forming a washing chamber for washing an object to be washed; a first circulation duct in which air discharged from the tub flows; an external air introduction duct in which air introduced from the outside flows; a fan assembly for introducing the air flowing in the first circulation duct and the external air introduction duct and then discharging same; a second circulation duct for heating a portion of the air discharged from the fan assembly and supplying same to the tub; and an exhaust duct for discharging, to the outside, the remaining portion of the air discharged from the fan assembly.

Description

dish wash machine

The present invention relates to a dishwasher.

The dishwasher is a device that can wash dishes using water and detergent in a space where the dishes can be stored, and wash the dishes through a rinsing and drying process. Cleaning and rinsing with water and detergent can remove foreign substances from the dishes. In addition, it is possible to finish the washing of the dish through a drying process to remove the water remaining in the dish.

The drying process of the dishwasher increases the temperature of the water sprayed on the tableware, increases the temperature of the tableware, promotes the evaporation of the water on the tableware, and condenses the evaporated water vapor in a cooling duct located inside or outside the washing tank, Absorption can be done.

When the humid air inside the dishwasher is discharged to the outside, the dishes inside the dishwasher can be dried quickly.However, when the humid air is discharged to the outside of the dishwasher, There is a problem that may occur, such as mold or damage the external configuration.

The problem to be solved by the present invention is to provide a dishwasher that can be discharged to the outside by lowering the humidity of the air discharged from the tub.

Another object of the present invention is to provide a dishwasher capable of effectively drying the tub by flowing the air of the tub in a circulating manner.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the dishwasher according to the present invention, the tub to form a washing chamber for washing the washing object; A first circulation duct through which air discharged from the tub flows; External air inlet ducts through which air flows from the outside; A fan assembly for introducing and discharging air flowing through the first circulation duct and the outside air inlet duct; A second circulation duct for heating part of the air discharged from the fan assembly and supplying the tub to the tub; And including an exhaust duct for discharging the remaining part of the air discharged from the fan assembly to the outside, the air discharged from the inside of the tub can be discharged by mixing with the outside air.

The second circulation duct may include a circulation unit heater for heating the air supplied to the tub, and may heat the air introduced into the tub.

A first mixing duct for mixing the first circulation duct and the air introduced from the outside air inlet duct and supplying the air to the fan assembly; And a second mixing duct for supplying air discharged from the fan assembly to the second circulation duct and the exhaust duct, respectively, to mix the air discharged from the inside of the tub, and to divide or discharge the mixed air. Can be.

A first regulating valve controlling a ratio of air introduced into the first mixed duct from the first circulation duct and air introduced into the first mixed duct from the external air inlet duct; The second mixing duct may further include a second control valve for adjusting the ratio of the air discharged from the second circulation duct and the exhaust duct, respectively, it is possible to adjust the ratio of the air is mixed or disposed.

The first control valve is disposed in a portion where the first circulation duct and the outside air inlet duct are laminated, and between the first circulation passage formed inside the first circulation duct and the outside air passage formed inside the outside air inlet duct. By rotating, by adjusting the ratio of the air introduced into the first mixing duct, it is possible to adjust the ratio of the air to be mixed.

The first control valve may be arranged to reduce the amount of inlet air flowing into the outside air inlet duct as the drying step proceeds.

The second control valve is disposed in a portion where the second mixing duct is branched into the second circulation duct and the exhaust duct, and a second circulation passage formed in the second circulation duct and an exhaust passage formed inside the exhaust duct. Rotating therebetween, the ratio of the air discharged from the second mixed duct to the second circulation duct and the exhaust duct may be adjusted to adjust the ratio of the discharged air and the circulated air.

The flow path cross sectional area of the first circulation duct and the flow path cross sectional area of the external air inlet duct are different from each other, so that the ratio of air to be mixed can be adjusted.

The flow path cross sectional area of the second circulation duct and the flow path cross sectional area of the exhaust duct are different from each other, so that the ratio of air discharged or circulated can be adjusted.

The first circulation duct and the outside air inlet duct may be connected to the fan assembly, respectively, and the air and the outside air circulated may be mixed in the fan assembly.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the dishwasher of the present invention, there are one or more of the following effects.

First, by mixing the air circulated in the tub with the outside air, it is discharged in a state of low humidity has the advantage of drying the tub without damaging the surrounding components of the dishwasher.

Second, by mixing the air circulated in the tub with the outside air, and heated and supplied to the tub again, there is an advantage that the drying in the tub can be made quickly.

Third, it is possible to adjust the mixing ratio of air and outside air discharged from the tub, there is an advantage that can adjust the mixing ratio of the outside air according to the progress of the drying.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

1 is a schematic front cross-sectional view of a dishwasher according to one embodiment of the present invention.

2 is a perspective view illustrating a tub, a circulation duct, an outside air inlet duct, and an exhaust duct according to an embodiment of the present invention.

3 is a view for explaining the air flowing in the dishwasher according to an embodiment of the present invention.

Figure 4 is a schematic diagram showing a first control valve for controlling the air flowing between the first circulation passage, the outside air inflow passage in accordance with an embodiment of the present invention.

5 is a schematic diagram illustrating a second control valve for controlling air flowing between the second circulation passage and the exhaust passage according to an embodiment of the present invention.

6 is a view for explaining the air flowing in the dishwasher according to another embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete and common knowledge in the art to which the present invention pertains. It is provided to fully inform the person having the scope of the invention, and the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for describing the dishwasher according to embodiments of the present invention.

Referring to FIG. 1, the dishwasher 10 according to the present embodiment is coupled to a cabinet 12 and a cabinet 12 forming an outer shape, and a door 16 and a cabinet 12 that open and close the inside of the cabinet 12. It includes a tub 14 installed therein and formed with a washing chamber 14a for processing the dishes placed therein. The cabinet 12 and the tub 14 have a form in which the front surface on which the door 16 is disposed is opened.

The dishwasher 10 according to the present embodiment may include a dispenser (not shown) for storing the detergent introduced by the user and injecting the detergent into the tub 14 in the washing step. The dispenser may be disposed in the door 16.

Cabinet 12 according to the present embodiment forms an outer shape, one side may be open.

The tub 14 according to the present embodiment is disposed inside the cabinet 12. The tub 14 according to the present exemplary embodiment may form a space between the cabinet 12 and the heat exchange duct 80 and the

circulation ducts

60 and 70 to be described below. In the upper surface of the tub 14 according to the present embodiment, a circulation duct inlet hole 60b through which air flowing through the washing chamber 14a inside the tub 14 is discharged to the

circulation ducts

60 and 70 is formed. The side of the tub 14 according to the present embodiment is formed with a circulation duct exhaust hole 64b through which air flowing in the

circulation ducts

60 and 70 is discharged into the washing chamber 14a inside the tub 14.

Dishwasher 10 according to the present embodiment is a rack (36, 38) for receiving the dishes in the tub 14, the spray nozzle 30 for spraying the washing water toward the dishes accommodated in the rack (36, 38) 32, 34, a sump 18 for supplying washing water to the

injection nozzles

30, 32, and 34, and a washing pump 20 for pumping the washing water stored in the sump 18 into the injection module.

The racks 36 and 38 include an upper rack 36 disposed above the washing chamber 14a and a lower rack 38 disposed below the upper rack 36. The

spray nozzles

30, 32, and 34 are disposed on the upper side of the washing chamber 14a and disposed between the top spray nozzle 30, the upper rack 36, and the lower rack 38 for spraying the washing water into the washing chamber 14a. It is disposed below the upper injection nozzle 32 and the lower rack 38 for spraying the washing water to the upper rack 36 or the upper rack 36 and the lower rack 38, spraying the washing water to the lower rack (38) It may further include a lower portion four nozzles (34). Each of the plurality of

injection nozzles

30, 32, and 34 may be connected to a plurality of injection

nozzle connecting pipes

40, 42, and 44.

In the washing pump 20, the impeller 22 rotating to supply the washing water in the washing pump 20 to the plurality of injection nozzles, the washing motor 24 rotating the impeller 22, and the washing pump 20 inside the washing pump 20. It may include a heater 26 for heating the wash water. The washing water pumped from the washing pump 20 flows through the washing water supply pipe 46, and the switching valve 28 connects at least one of the plurality of

injection nozzles

30, 32, and 34 to the washing water supply pipe 46.

The dishwasher 10 according to the present embodiment may include a water supply assembly for supplying washing water into the dishwasher and a drainage assembly for draining the water stored in the dishwasher. The water supply assembly according to the present embodiment includes a water supply pipe 48 for forming a water supply passage through which the washing water is supplied from an external water source, a water supply valve 50 for opening and closing the water supply passage formed in the water supply pipe 48, and a sump through the water supply passage. It may include a flow meter (not shown) for measuring the flow rate of the washing water flowing to 18.

The drainage assembly according to the present embodiment is disposed on the drainage pipe 52 in which the drainage flow path for guiding water stored in the sump 18 to the outside and the drainage flow path formed in the drainage pipe 52 is disposed to wash the water in the sump 18. It may be provided with a drain pump 54 for draining to the outside. The drain pump 54 may include a drain motor (not shown) for generating a rotational force.

2 is a perspective view illustrating a tub, a circulation duct, an outside air inlet duct, and an exhaust duct according to an embodiment of the present invention. 3 is a view for explaining the air flowing in the dishwasher according to an embodiment of the present invention. Figure 4 is a schematic diagram showing a first control valve for controlling the air flowing between the first circulation passage, the outside air inflow passage in accordance with an embodiment of the present invention. 5 is a schematic diagram illustrating a second control valve for controlling air flowing between the second circulation passage and the exhaust passage according to an embodiment of the present invention.

Hereinafter, a configuration for drying air in the tub of the dish washing machine according to the present embodiment will be described with reference to FIGS. 2 to 5.

Dishwasher 10 according to the present embodiment is disposed on one side of the tub 14, the air discharged from the tub 14 through the circulation duct inlet (60b) (hereinafter 'first air (A1)') The first air duct 60 that flows, the outside air inflow duct 62 through which the air introduced from the outside (hereinafter referred to as 'second air A2') flows, and the first air that flows through the first circulation duct 60 The fan assembly 68 for introducing and discharging the second air A2 flowing through the A1 and the outside air inlet duct 62 and the air discharged from the fan assembly 68 are heated and supplied to the tub 14. The second circulation duct 64 includes an exhaust duct 66 for exhausting the air discharged from the fan assembly to the outside of the cabinet 12. Here, the air flowing in the second circulation duct 64 is divided into the third air A3 and the air flowing in the exhaust duct 66 is described as the fourth air A4.

In the first circulation duct 60, the air discharged from the washing chamber 14a inside the tub 14 is introduced through the circulation duct inlet hole 60b. In addition, the air flowing through the first circulation duct 60 flows to the fan assembly 68. A first circulation passage 60a through which air discharged from the tub 14 flows is formed in the first circulation duct 60. The first circulation duct 60 according to the present embodiment may be connected to the external air inlet duct 62 at one side.

The outside air inlet duct 62 forms an outside air flow path 62a through which external air introduced from the outside of the cabinet 12 flows. The outside air inlet duct 62 may communicate with the outside at the rear or the bottom of the cabinet 12. It is also possible to communicate with a space formed under the cabinet 12 and the tub 14. The second air A2 flowing through the outside air passage 62a is mixed with the first air A1 to lower the humidity of the circulating air discharged from the tub 14.

The passage cross-sectional area of the first circulation duct 60 and the passage cross-sectional area of the external air inlet duct 62 may be formed differently. Therefore, by adjusting the size of the cross-sectional area of the first circulation passage (60a) and the cross-sectional area of the external air passage (62a), it is possible to adjust the mixing ratio of the outside air flowing into the fan assembly (68).

The second circulation duct 64 forms a second circulation passage 64a through which air mixed with the second air introduced from the outside of the first air A1 discharged from the tub 14 flows. Therefore, the third air A3 flowing through the second circulation duct 64 may maintain a state in which the humidity is lower than that of the first air A1. In the second circulation duct 64, a circulation unit heater 70 for heating air flowing through the second circulation channel 64a is disposed. The circulation heater 70 is disposed at the inlet end of the second circulation duct 64. The circulation heater 70 is disposed downstream of the second control valve 74 to be described below.

Only the third air A3 flowing through the second circulation duct 64 may be heated. The third air A3 flowing through the second circulation duct 64 is heated by the circulation heater 70 and supplied to the washing chamber 14a inside the tub 14.

The exhaust duct 66 forms an exhaust passage 66a through which air mixed with the second air introduced from the outside of the first air A1 discharged from the tub 14 flows. Therefore, the fourth air A4 flowing through the exhaust passage 66a may be exhausted in a state where the humidity is lower than that of the first air A1. Therefore, the humid air discharged from the tub 14 to the outside of the cabinet 12 is not directly discharged.

The flow path cross-sectional area of the second circulation duct 64 and the flow path cross-sectional area of the exhaust duct 66 may be formed differently. Therefore, by adjusting the size of the cross-sectional area of the second circulation passage 64a and the cross-sectional area of the exhaust passage 66a, the flow rate of air circulating the air discharged from the tub 14 and the flow rate of the exhausted air can be adjusted. .

The exhaust duct 66 according to the present exemplary embodiment may form the

exhaust ports

67a and 67b in the upper front of the tub 14. A plurality of

exhaust ports

67a and 67b according to the present embodiment may be formed at the front upper side of the tub 14. The

exhaust ports

67a and 67b according to the present exemplary embodiment may be disposed in an area that does not interfere with the configuration of the door 16 in consideration of the locked state of the door 16.

The fan assembly 68 forms an outer shape, a fan housing (not shown) connecting the first mixing duct 76 and the second mixing duct 78 and a fan disposed inside the fan housing to form a flow of air. (Not shown), a fan motor (not shown) for driving the fan may be included.

The first air A1 and the second air A2 introduced into the fan housing may flow through the inside of the fan housing by a fan rotating inside the fan housing, and may be further mixed. In the fan housing according to the present exemplary embodiment, one inlet port (not shown) communicating with the first mixing duct 76 and one outlet port (not shown) communicating with the second mixing duct 78 may be formed.

The dishwasher 10 according to the present exemplary embodiment includes a first mixing duct 76 and a fan that mix air supplied from the first circulation duct 60 and the air inlet duct 62 and supply the same to the fan assembly 68. And a second mixing duct 78 for supplying the air discharged from the assembly 68 to each of the second circulation duct 64 and the exhaust duct 66.

The first mixing duct 76 is mixed with wet air discharged from the tub 14 flowing the first circulation duct 60 and external air introduced from the outside of the cabinet 12 flowing the outside air inlet duct 62. Flow. Therefore, the air flowing through the first mixing duct 76 may maintain a lower humidity than the first air A1.

In the second mixing duct 78, the air discharged from the fan assembly 68 flows. The air flowing through the second mixing duct 78 may be air in which the first air A1 and the second air A2 are further mixed while passing through the fan assembly 68.

The dishwasher 10 according to the present embodiment includes a first control valve 72 for adjusting a ratio of the first air A1 and the second air A2 introduced into the first mixing duct 76, and the second control valve 72. And a second control valve 74 for controlling the ratio of air discharged from the mixing duct 78 to the second circulation duct 64 and the exhaust duct 66, respectively.

The first control valve 72 may be disposed at a portion where the first circulation duct 60 and the external air inlet duct 62 are laminated. The first control valve 72 rotates between the first circulation passage 60a and the outside air passage 62a, and controls the first air A1 and the second air A2 flowing into the first mixing duct 76. You can adjust the ratio.

The first control valve 72 drives the fan assembly 68, operates the circulation heater 70, and is arranged to reduce the inflow of outside air introduced into the outside air inlet duct 62 when the drying step is performed. Can be. That is, the first control valve 72 is disposed so that the outside air ratio is high in the early stage of the drying step and the outside air ratio is low in the latter stage to discharge the humidity of the mixed air discharged to the exhaust duct 66 to a predetermined level or less. Can be.

That is, referring to FIG. 4, when the fan assembly 68 is driven, the circulation heater 70 is operated, and the drying step is performed, the first control valve 72 is the first circulation passage 60a at the beginning of the progress. ) And the first control valve 72 may be disposed to the outside air flow path 62a side.

The second control valve 74 may be disposed at a portion where the second mixing duct 78 is branched into the second circulation duct 64 and the exhaust duct 66. The second control valve 74 rotates between the second circulation passage 64a and the exhaust passage 66a, and the air discharged from the second mixing duct 78 receives the second circulation duct 64 and the exhaust duct 66. ) The rate of discharge can be adjusted.

Referring to Figure 6, it describes the flow of air in the dishwasher according to another embodiment of the present invention. The dishwasher 10 according to the present exemplary embodiment has a structure in which the first circulation duct 60 and the outdoor air inlet duct 62 are connected to the fan assembly 68, respectively.

Therefore, no separate first mixing duct and first control valve are provided. The fan assembly 68 according to the present embodiment has the same configuration as the fan housing, the fan, and the fan motor, but the fan housing has a first inlet port (not shown) and an external air inlet duct communicating with the first circulation duct 60. A second inlet (not shown) in communication with 62 may be formed.

The size of the cross-section of the first inlet and the size of the second inlet according to the present embodiment may be formed in different sizes. Therefore, the mixing ratio of the outside air introduced into the fan assembly 68 can be adjusted.

Although the above has been shown and described with respect to preferred embodiments of the present invention, the present invention is not limited to the above-described specific embodiments, it is intended in the technical field to which the invention belongs without departing from the spirit of the invention claimed in the claims. Various modifications can be made by those skilled in the art, and these modifications should not be individually understood from the technical spirit or the prospect of the present invention.

Claims

Tub to form a washing chamber for washing the washing object;

A first circulation duct through which air discharged from the tub flows;

External air inlet ducts through which air flows from the outside;

A fan assembly for introducing and discharging air flowing through the first circulation duct and the outside air inlet duct;

A second circulation duct for heating part of the air discharged from the fan assembly and supplying the tub to the tub;

A dishwasher comprising an exhaust duct for discharging the remaining part of the air discharged from the fan assembly to the outside.
The method of claim 1,

The second circulation duct includes a dishwasher including a circulation heater for heating the air supplied to the tub.
The method of claim 1,

A first mixing duct for mixing the first circulation duct and the air introduced from the outside air inlet duct and supplying the air to the fan assembly; And

And a second mixing duct for supplying air discharged from the fan assembly to the second circulation duct and the exhaust duct, respectively.
The method of claim 3, wherein

A first regulating valve controlling a ratio of air introduced into the first mixed duct from the first circulation duct and air introduced into the first mixed duct from the external air inlet duct;

And a second control valve configured to control a ratio of air discharged from the second mixed duct to the second circulation duct and the exhaust duct, respectively.
The method of claim 4, wherein

The first control valve is disposed in a portion where the first circulation duct and the outside air inlet duct are laminated, and between the first circulation passage formed inside the first circulation duct and the outside air passage formed inside the outside air inlet duct. Rotating, dishwasher for adjusting the ratio of air flowing into the first mixing duct.
The method of claim 4, wherein

The first control valve is a dish washer disposed to reduce the amount of inlet air flowing into the air inlet duct as the drying step proceeds.
The method of claim 4, wherein

The second control valve is disposed in a portion where the second mixing duct is branched into the second circulation duct and the exhaust duct, and a second circulation passage formed in the second circulation duct and an exhaust passage formed inside the exhaust duct. Rotating therebetween, and controls the ratio of the air discharged from the second mixed duct to the second circulation duct and the exhaust duct, respectively.
The method of claim 1,

And a flow path cross-sectional area of the first circulation duct and a flow path cross-sectional area of the external air inlet duct are different from each other.
The method of claim 1,

And a channel cross-sectional area of the second circulation duct and a channel cross-sectional area of the exhaust duct are different in size.
The method of claim 1,

And the first circulation duct and the air inlet duct are connected to the fan assembly, respectively.
The method of claim 1,

And a circulation duct inlet hole communicating with the washing chamber and the first circulation duct on an upper surface of the tub.
The method of claim 11,

The fan assembly is disposed in the lower side of the tub, the dishwasher for flowing out the air exited through the circulation duct inlet downwards.
The method of claim 12,

The first circulation duct is disposed outside the one side of the tub, the dish washing machine to be interviewed.
The method of claim 12,

The outside air inlet duct is connected to the first circulation duct at one side of the tub located between the circulation duct inlet hole and the fan assembly.
The method of claim 1,

The exhaust duct is a dish washing machine to form an exhaust port in the upper front of the tub.
The method of claim 1,

The exhaust duct is a dishwasher disposed to be interviewed on one side or the upper surface of the tub.