KR102390030B1 - Dishwasher - Google Patents

Abstract

The present invention provides a tub that is inserted into a receiving unit through an open surface and accommodates a washing target, a jet unit that sprays washing water to the washing target, and a space in which washing water is stored, and the washing water injected into the tub through the jet unit is provided. A recovered sump, a housing fixed to an outer circumferential surface of the tub and positioned between the receiving portion and the tub, a water supply passage portion provided in the housing and connecting at least one of the tub and the sump to a water supply source; The present invention relates to a dishwasher including a guider for preventing the housing from colliding with the accommodating part when the tub is inserted into the accommodating part.

Description

Dishwasher {DISHWASHER}

The present invention relates to a dishwasher.

Dishwasher is a home appliance that removes foreign substances remaining on the object to be washed by spraying washing water on the object to be washed.

Conventional dish washing machines include a tub that provides a washing space, a rack provided in the tub to receive a washing object, a jet arm that sprays washing water into the rack, a sump that stores washing water, and a sump that supplies washing water stored in the sump to the jet arm. It is common to include a pump (Patent Publication No. 10-2007-0105048, European Patent Application Publication EP2684508, Patent Publication No. 10-2013-0025263, Publication No. 10-2005-0045368, DE19844898) .

On the other hand, some of the conventional dishwashers can wash or sterilize the object to be washed by using heated washing water (hot water) or supplying steam to the object to be washed.

Dishwasher using hot water generally generates hot water by heating washing water stored in the sump through a heater provided inside the sump. In this case, since the heater is exposed inside the sump and has to contact the washing water, the conventional dishwasher has a disadvantage in that the water level inside the sump must be controlled so that the heater is not exposed to prevent overheating of the heater.

In addition, since heat transfer was possible only when the heater was in contact with the washing water, there was a problem in that the heat exchange efficiency was deteriorated due to the attachment of foreign substances to the surface of the heater, or the surface of the heater was corroded and the durability was reduced.

Meanwhile, a dishwasher using steam is divided into a case in which steam is generated through a heater provided in the sump and a case in which a separate steam generator is provided to generate steam.

A dishwasher generating steam through a heater provided in the sump has the same problem as a dish washing machine generating hot water through a heater provided in the sump. When the steam generator is provided as a storage unit for storing water and a heater provided inside the storage unit to heat water, the dishwasher generating steam through a separate steam generator also supplies hot water through a heater provided inside the sump. It has the same problem as the dishwasher it generates.

On the other hand, the sump provided in the conventional dish washing machine is provided to not only store the washing water supplied from the water supply source but also to recover the washing water sprayed from the jet arm to the washing object. There was a method of supplying washing water to the furnace (tub water supply type) and a method of directly connecting the sump and the water supply source (sump water supply type).

Unlike the tub water supply type, the sump water supply type has a problem in that the washing water stored in the sump moves toward the water supply source when negative pressure occurs in the water supply source (the washing water is discharged from the sump).

An object of the present invention is to provide a dishwasher that prevents the washing water stored in the sump from being discharged to the outside of the sump even when a negative pressure occurs in the water supply source.

Another object of the present invention is to provide a dishwasher having a flow path that prevents the washing water stored in the sump from being discharged to the outside of the sump even when a negative pressure is generated in the water supply source.

Another object of the present invention is to provide a dishwasher capable of preventing damage to a flow passage during assembly or installation.

Another object of the present invention is to provide a dishwasher that simultaneously performs a function of heating washing water and a function of circulating washing water.

In order to solve the above problems, the present invention is a receiving portion provided with an open surface; a tub inserted into the accommodating part through the open surface and accommodating the object to be washed; a spraying unit for spraying washing water to the washing object; a sump providing a space in which washing water is stored and in which the washing water injected into the tub through the spraying unit is recovered; a housing fixed to the outer circumferential surface of the tub and positioned between the accommodating part and the tub; a water supply passage part provided in the housing and connecting at least one of the tub and the sump to a water supply source; A guider for preventing the housing from colliding with the receiving unit when the tub is inserted into the receiving unit; provides a dishwasher including a.

The guider may include a guider body extending from the housing and a bending part provided by bending a free end of the guider body.

The guider body may be positioned on the same plane as the housing.

The accommodating part may be provided as a cabinet forming the exterior of the tub.

The accommodating part may be provided as furniture or a wall having a space in which the tub can be accommodated.

The housing further includes; a first communication part for communicating the tub and the inside of the housing, wherein the water supply passage part includes a water supply passage connected to a water supply source; a first flow passage for communicating the water supply passage with the first communication unit; and a second flow passage for guiding the washing water supplied from the water supply passage to the sump.

The present invention provides a water supply connection pipe connecting the second flow path and the sump; It may further include; a water softener provided in the water supply connection pipe to lower the hardness (hardness) of the washing water.

The present invention provides a second communication unit for communicating the inside of the housing with the outside of the housing; a drain passage provided inside the housing to guide the washing water discharged from the sump to the outside of the accommodating part and passing through a position higher than the highest water level set in the sump; It may further include; a siphon brake that communicates with the drain passage and the second communication part according to the pressure inside the drain passage.

The present invention provides a first chamber into which the washing water stored in the sump is introduced; a second chamber communicating with the first chamber and the injection unit; an impeller rotatably provided inside the second chamber to move the washing water flowing into the first chamber to the injection unit; a heat transfer unit forming a bottom surface of the first chamber and detachable from the first chamber; It may further include; a heating unit fixed to the heat transfer unit, positioned outside the first chamber, and configured to heat the heat transfer unit.

The present invention can achieve the effect of providing a dishwasher in which the washing water stored in the sump is prevented from being discharged to the outside of the sump even when a negative pressure is generated in the water supply source.

In addition, the present invention can achieve the effect of providing a dishwasher having a flow path that prevents the washing water stored in the sump from being discharged to the outside of the sump even when a negative pressure is generated in the water supply source.

In addition, the present invention can achieve the effect of providing a dishwasher capable of preventing damage to the flow path during assembly or installation.

In addition, the present invention can achieve the effect of providing a dishwasher that simultaneously performs a function of heating the washing water and a function of circulating the washing water.

1 illustrates an example of a dishwasher according to the present invention.
2 and 3 show an example of a flow path provided in the present invention.
Figure 4 shows an example of the guider provided in the flow passage.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. On the other hand, the configuration or control method of the device to be described below is only for explaining the embodiment of the present invention, not for limiting the scope of the present invention, and the same reference numbers used throughout the specification refer to the same components represent them

As shown in FIG. 1 , the dishwasher according to the present invention includes a receiving unit 1 , a tub 11 provided inside the receiving unit to receive a washing object, a spraying unit 3 for spraying washing water to the washing target, and washing water. may include a sump 13 in which is stored, and a circulation pump 8 that supplies the washing water stored in the sump to the spray unit 3 .

The accommodating part 1 is provided to surround the tub 11 and may be provided as a cabinet forming the exterior of the dishwasher, and kitchen furniture (sink, etc.) or a wall having a space in which the tub 11 can be accommodated. (wall) may be provided.

Racks 191 and 193 for accommodating the object to be washed are provided inside the tub 11, and the racks may be provided with a first rack 191 and a second rack 193 positioned under the first rack. can

The washing space provided by the tub 11 is opened and closed by the door 16 . Accordingly, the user can withdraw the racks from the washing space or insert the racks into the washing space by opening the door.

The tub 11 is supported by a base 12, and the sump 13 is fixed to the base and positioned below the tub. The sump 13 receives washing water through the water supply connection pipe 131 and discharges the washing water to the outside of the sump through the drain connection pipe 135 and the drain pump 137 .

The water supply connection pipe 131 may further include a water softener 133 for lowering the hardness of the washing water. The hardness of water is a value expressed by converting the amounts of calcium and magnesium contained in water into ppm of calcium carbonate. ) is a means to solve this problem.

A sump cover 15 is provided between the sump 13 and the tub 11, and the sump cover is provided with a recovery hole 151 for communicating the inside of the tub and the sump. Accordingly, the washing water sprayed to the tub by the spraying unit 3 will be recovered to the sump through the recovery hole.

When the tub is provided with a first rack and a second rack, the spraying unit 3 is configured with a first spraying arm 31 for spraying washing water to the first rack 191 and the second rack 193 . It may be provided as a second spray arm 33 for spraying washing water.

The first jet arm and the second jet arm receive washing water through a dark flow path 35 , and the dark flow path is provided to connect the respective jet arms 31 and 33 and the circulation pump 8 .

The female passage 35 includes a connection passage 351 connected to the circulation pump 8, a first arm passage 353 connecting the connection passage and the first injection arm 31, and the connection passage and the second injection arm. It may be provided as a second arm flow path 355 connecting the 33 . Accordingly, when the circulation pump 8 operates, the washing water inside the sump 13 flows into the connection passage 351 and then is supplied to the arms 31 and 33 through the respective arm passages 353 and 355 .

However, the first arm flow path 353 and the second arm flow path 355 may be provided as the connection flow path 351 is branched. In this case, a switching valve ( 357) may be provided. The selector valve 357 may selectively open the first arm flow path and the second arm flow path, or open at the same time.

The circulation pump 8 communicates with a pump body 81 located inside the base 12, a first chamber 82 provided inside the pump body and communicating with the sump 13, and the first chamber, It may be provided with a second chamber 85 to which the female passage 35 is connected, and an impeller 87 provided in the second chamber.

The first chamber 82 and the second chamber 85 are separated from each other by a partition wall 811 provided inside the pump body 81 . A partition wall through hole 813 for communicating the first chamber and the second chamber should be provided in the partition wall.

The first chamber 82 is connected to the sump 13 through the chamber inlet 821 , and the second chamber 85 is connected to the connection passage 351 through the chamber outlet 851 .

The impeller 87 is rotated by a driving unit 89 located outside the pump body 81 . Therefore, when the impeller rotates, the washing water inside the sump 13 flows into the first chamber 82, and the washing water flowing into the first chamber flows into the second chamber 85 through the partition wall through hole 813. It is supplied to the connection passage 351 through the chamber outlet 851.

A heater 88 for heating the washing water may be provided in the first chamber 82 . The heater may include a heat transfer unit 881 forming the bottom surface of the first chamber 82 and a heating unit 883 heating the heat transfer unit. The heating unit 883 is fixed to the heat transfer unit 881 and is located outside the first chamber, and may be provided as a heating element that generates heat when current is supplied.

In a conventional dishwasher, a heater for heating washing water is generally located inside a chamber storing washing water. In this case, there is a disadvantage in that the controller of the dishwasher can prevent overheating of the heater only by controlling the water level inside the chamber so that the heater is not exposed to the outside of the washing water.

However, in the present invention, since the entire bottom surface of the first chamber 82 is composed of a heat transfer part 881 (conductor), and the heat transfer part is heated by the heating part 883 located outside the first chamber, the first chamber The present invention can prevent overheating of the heater even without controlling the water level in the interior.

As shown in FIG. 2 , the water supply connection pipe 131 provided in the sump is connected to the water supply source through the flow path 9 , and the drain connection pipe 135 is connected to the sump through the flow path 9 . 13) Discharge the washing water from the inside to the outside of the dishwasher.

As shown in FIG. 3 , the flow path part 9 is a housing 91 fixed to one surface of the tub 11 , and is provided inside the housing to connect the water supply connection pipe 131 and the water supply source S. It may be provided with a water supply passage part 95 and a drain passage part 97 connected to the drain connection pipe 135 .

The housing 91 includes a first communication part 911 communicating with the tub 11, and the water supply flow passage 95 is a water supply passage 951 connected to the water supply source S, supplied from the water supply passage. It may be provided as a first flow path 952 for guiding the washing water to be used to the first communication unit 911 and a second flow path 955 for connecting the water supply flow path and the water supply connection pipe 131 .

The dishwasher having the above-described structure can prevent the washing water stored in the sump 13 from flowing back into the housing 91 through the second flow path 955 even when negative pressure occurs in the water supply source S. there is. The first flow passage 952 and the second flow passage 955 are provided by branching the water supply passage 951 , and the branching point of the first passage 952 and the second passage 955 is a first communication part 911 . It is connected to the tub 11 through the. Therefore, according to the present invention, the air inside the tub can be supplied to the water supply passage 951 , so that even if a negative pressure occurs in the water supply source S, the washing water stored in the sump can be prevented from moving to the housing 91 .

In order to control the amount of washing water supplied to the sump 13 , a flow rate measuring unit 9511 may be provided in the water supply passage 951 , and the water supply passage 951 may be opened and closed by a valve 9513 . can Accordingly, the control unit (not shown) may control the amount of washing water supplied to the sump through the valve and the flow rate measurement unit.

The drain passage part 97 may be provided in the housing 91 as a drain passage 971 connected to the drain connection pipe 135 . The drain passage 971 should be provided so that the sump 13 passes through a point L2 that is higher than the maximum water level L1 of the wash water that can be stored. This is to ensure that a certain amount of washing water can be stored inside the sump.

In the above-described dishwasher, when the drain pump 137 operates, the washing water inside the sump will be discharged to the outside of the dishwasher through the drain connection pipe 135 and the drain passage 971 .

On the other hand, when the washing water inside the sump 13 is discharged by the drain pump 137 to the outside of the sump, even if the operation of the drain pump 137 is stopped, the washing water inside the sump 13 is caused by a siphon phenomenon. will all drain out of the sump. That is, the washing water will not remain in the drain connection pipe 135 and the drain passage 971 due to the siphon phenomenon.

However, when the drain passage 971 is connected to the sewer, if the washing water does not remain in the drain connection pipe 135 or the drain passage 971 , an odor may be introduced into the sump 13 . In order to prevent such a problem, siphon brakes 973 and 975 may be provided in the drain passage 971 .

The siphon brakes 973 and 975 may include a connection chamber 973 connected to the drain passage 971 and a check valve 975 for opening and closing the connection chamber. The check valve is a means for communicating the inside of the drain passage 971 with the inside of the housing 91 according to the pressure inside the drain passage 971 .

When the drain pump 137 operates, the check valve 975 will close the connection chamber 973 . However, when the drain pump stops operating, the check valve 975 opens the connection chamber 973 to communicate the inside of the connection chamber 973 with the inside of the housing 91 .

The housing 91 is connected to the inside of the tub 11 through the first communication part 911 . Accordingly, when the connection chamber 973 is opened by the check valve 975 , air will flow into the drain passage 971 , so that some of the washing water in the drain passage 971 is passed through the sewage pipe to the outside of the dishwasher. The remaining part of the washing water inside the drain passage 971 will remain in the drain connection pipe 135 . Therefore, according to the present invention, it is possible to prevent odor from entering the sump 13 through the washing water remaining inside the drain connection pipe 135 .

In order to more effectively implement the function of the siphon brake, the housing 91 may further include a second communication part 913 for communicating the inside of the housing and the outside of the housing.

An air flow path 915 connected to the second communication part 913 to introduce air into the housing may be further provided in the housing 91, and an air discharge end provided in the air flow path 915 ( 917) is preferably provided at a higher position than the check valve (975). This is to prevent the washing water from being discharged to the outside of the housing through the air passage even if the washing water leaks into the housing 91 through the check valve.

The flow path part 9 having the above-described structure has a risk of being damaged by the receiving part 1 when the tub 11 is coupled to the accommodating part 1 . Accordingly, the flow path part 9 may further include a guider 93 for preventing the flow path part 9 from colliding with the receiving part 1 when the tub 11 is coupled to the receiving part 1 . .

As shown in FIG. 4 , the guider 93 includes a guider body 931 fixed to the housing 91 and a bent portion 933 provided by bending the free end of the guider body 931 . may include

In this case, the guider body 931 extending from the housing 91 is preferably provided to form the same plane as the housing 91 . However, the guider body 931 may be fixed to protrude from the surface of the housing 91 .

The present invention may be modified and implemented in various forms, but the scope of the rights is not limited to the above-described embodiments. Therefore, if the modified embodiment includes the elements of the claims of the present invention, it should be regarded as belonging to the scope of the present invention.

100: dishwasher 1: receiving part 11: tub
12: base 13: sump 131: water supply connector
133: soft water unit 135: drain connection pipe 137: drain pump
15: sump cover 151: recovery hole 16: door
3: injection part 35: dark flow path 351: connecting flow path
353: first arm flow path 355: second arm flow path 357: selector valve
8: circulation pump 81: pump body 811: bulkhead
813: bulkhead through hole 82: first chamber opening surface 821: chamber inlet
85: second chamber 851: chamber outlet 87: impeller
89: driving part 88: heater 9: flow path part
91: housing 911: first communication part 913: second communication part
915: air passage 917: air outlet 93: guider
931: guider body 933: bent part 95: water supply passage part
951: water supply channel 952: first euro 955: second euro
97: drain passage part 971: drain passage 973: connection chamber
975: check valve

Claims (9)

Receiving portion provided with an open surface;
a tub inserted into the accommodating part through the open surface and accommodating the object to be washed;
a spraying unit for spraying washing water to the washing object;
a sump providing a space in which washing water is stored and in which the washing water sprayed into the tub through the spray unit is recovered;
a housing fixed to the outer circumferential surface of the tub and positioned between the accommodating part and the tub;
a water supply passage part provided in the housing and connecting at least one of the tub and the sump to a water supply source;
A guider for preventing the housing from colliding with the receiving unit when the tub is inserted into the receiving unit;
The distance from one surface of the receiving part facing the outer circumferential surface of the tub to which the housing is fixed to the guider,
The dish washing machine, characterized in that the distance from one surface of the accommodating part to the contact surface of the housing and the tub is equal to or shorter than the distance from one surface of the accommodating part to the contact surface of the housing and the tub. According to claim 1,
The guider includes a guider body extending from the housing and a bending part provided by bending a free end of the guider body. 3. The method of claim 2,
The guider body is a dishwasher, characterized in that located on the same plane as the housing. 4. The method according to any one of claims 1 to 3,
The accommodating part is a dishwasher, characterized in that it is provided as a cabinet forming the exterior of the tub. 4. The method according to any one of claims 1 to 3,
The accommodating part is a dishwasher, characterized in that it is provided as a wall or furniture having a space in which the tub can be accommodated. According to claim 1,
The housing further includes a first communication part for communicating the tub and the inside of the housing;
The water supply passage unit may include: a water supply passage connected to a water supply source; a first flow passage for communicating the water supply passage with the first communication unit; and a second flow path for guiding washing water supplied from the water supply flow path to the sump. 7. The method of claim 6,
a water supply connection pipe connecting the second flow path and the sump;
The dishwasher according to claim 1, further comprising a water softener provided in the water supply connection pipe to lower the hardness of the washing water. 7. The method of claim 6,
a second communication part communicating the inside of the housing with the outside of the housing;
a drain passage provided inside the housing to guide the washing water discharged from the sump to the outside of the accommodating part, and passing through a position higher than the highest water level set in the sump;
The dishwasher according to claim 1, further comprising: a siphon brake for communicating the drain passage with the second communication unit according to a pressure inside the drain passage. According to claim 1,
a first chamber into which the washing water stored in the sump is introduced;
a second chamber communicating with the first chamber and the injection unit;
an impeller rotatably provided inside the second chamber to move the washing water flowing into the first chamber to the spray unit;
a heat transfer unit forming a bottom surface of the first chamber and detachable from the first chamber;
and a heating unit fixed to the heat transfer unit, positioned outside the first chamber, and configured to heat the heat transfer unit.

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