Dishwasher

Abstract

A dishwasher is provided. The dishwasher includes a tub in which tableware is accommodated, and a condenser disposed below the tub. Wash water and a refrigerant flow in the condenser in a manner separated from each other while exchanging heat with each other in the condenser. The condenser includes a case defining an outer shape thereof. The wash water and the refrigerant flow in the case, respectively. The condenser includes a tube received in an inside of the case. The refrigerant flows through the tube. The tube is wound to form a plurality of cylindrical structures which are arranged in series to be spaced apart from each other in a diameter direction of the case. Each of a plurality of tube portions extends in a longitudinal direction of the case, thereby being wound around a center of the case in a manner of a spiral coil to form each of the plurality of cylindrical structures.

Description

Technical Field

[0001] This disclosure relates to a dishwasher, and more specifically, to a dishwasher equipped with a heat pump system for heating the wash water. Background Technology

[0002] The content described in this section provides only background information about this disclosure and does not constitute prior art.

[0003] A dishwasher is a device that uses detergent and washing water to wash food residue (such as food crumbs) off dishes or cookware.

[0004] A typical dishwasher includes: a tub that provides washing space; shelves that are placed in the tub and hold dishes; spray arms that spray washing water onto the shelves; a water reservoir that stores the washing water; and a pump that supplies the washing water stored in the water reservoir to the spray arms.

[0005] The temperature of the wash water used in a dishwasher can be room temperature. However, using hot wash water can improve washing efficiency and shorten washing time. Therefore, hot wash water can be used for washing or rinsing dishes for at least a portion of the dishwasher's operation.

[0006] A heating device for heating washing water can be configured as, for example, an electric heater, a heat pump system, etc.

[0007] Because heat pump systems are more energy efficient than electric heaters, in recent years, there has been an increasing trend of incorporating heat pump systems into dishwashers for heating washing water.

[0008] A heat pump system can be equipped with a condenser, which heats the wash water through heat exchange between a high-temperature refrigerant and the relatively low-temperature wash water. The wash water can be heated to a high temperature as it flows through the condenser.

[0009] The refrigerant and wash water can flow separately from each other in the condenser. Therefore, heat is transferred from the high-temperature refrigerant to the wash water, thus condensing the refrigerant while simultaneously heating the wash water.

[0010] Heat exchange can occur between the refrigerant and the wash water in the condenser. Therefore, the wash water can be heated by absorbing heat from the refrigerant.

[0011] To improve the heat exchange performance between the refrigerant and the wash water in the condenser, it is necessary to define the flow paths of each of the refrigerant and the wash water.

[0012] Furthermore, preferably, the components constituting the heat pump system (e.g., the condenser located in a dishwasher) are easy to repair. For this purpose, these components need to be constructed to be easily removed from the dishwasher.

[0013] In addition, the wash water flowing through the condenser may contain foreign objects such as food waste. As the wash water flows continuously through the condenser, these foreign objects may accumulate inside the condenser.

[0014] These foreign objects can interfere with the heat exchange between the refrigerant and the wash water in the condenser, and may also interfere with the flow of the wash water. Therefore, there is a need to develop a dishwasher with a structure that can inhibit the accumulation of foreign objects in the condenser. Summary of the Invention

[0015] The technical objective of this disclosure is to provide a dishwasher that includes a condenser having a structure that improves heat exchange performance between the refrigerant and the washing water within the condenser.

[0016] Another technical object of this disclosure is to provide a dishwasher having a structure in which the various components constituting the heat pump system can be easily removed from the dishwasher.

[0017] Another technical objective of this disclosure is to provide a dishwasher having a structure capable of inhibiting the accumulation of foreign matter within the condenser.

[0018] The purpose of this disclosure is not limited to the purposes mentioned above. Other unmentioned purposes and advantages of this disclosure can be understood based on the following description and can be more clearly understood based on embodiments according to this disclosure. Furthermore, it will be readily understood that the purposes and advantages of this disclosure can be achieved using the means or combinations thereof as shown in the claims.

[0019] According to an embodiment, a dishwasher may include a bucket in which tableware is contained.

[0020] The dishwasher may include a condenser disposed below the tub. Wash water and refrigerant can flow through the condenser. When the wash water and refrigerant flow separately in the condenser, they can exchange heat with each other.

[0021] The condenser according to an embodiment may include a housing defining its external shape. The housing may be configured such that wash water and refrigerant flow separately therein.

[0022] A condenser may include pipes housed within a casing. Refrigerant can flow through these pipes.

[0023] The tube can be wound to form multiple cylindrical structures, which are arranged sequentially and spaced apart from each other in the diametrical direction of the housing.

[0024] Each of the multiple cylindrical structures may include a portion of a tube, wherein each portion of the tube may extend in the longitudinal direction of the housing and be wound around the center of the housing in a spiral coil manner to form each of the multiple cylindrical structures.

[0025] Each of the multiple tube sections of the tube can be wound in a spiral coil manner to form multiple coils, which are arranged to be spaced apart from each other in the longitudinal direction of the shell.

[0026] As multiple cylindrical structures are arranged outwards along the diameter of the shell, the corresponding diameters of the multiple cylindrical structures can be increased sequentially.

[0027] As multiple cylindrical structures are arranged sequentially inward along the diameter of the shell, the corresponding diameters of the multiple cylindrical structures can be decreased sequentially.

[0028] The condenser may include a cap that is removably connected to an open side of the housing. A refrigerant inlet and a refrigerant outlet section through which pipes pass may be formed in the cap.

[0029] The shell can be formed in a cylindrical shape with a hollow space.

[0030] The cap may include a closed end portion attached to the housing to close one open side of the housing.

[0031] The cap may include an extended connecting portion, which is formed as a hollow cylinder extending circumferentially from the closed end portion. The extended connecting portion may be attached to the outer circumferential surface of the housing.

[0032] The condenser may include a first wash water inlet / outlet portion formed to extend through the cap. Wash water can be introduced into or discharged from the housing through the first wash water inlet / outlet portion.

[0033] The condenser may include a second wash water inlet / outlet portion formed to extend through the housing. Wash water can be introduced into or discharged from the housing through the second wash water inlet / outlet portion.

[0034] The first washing water inflow / outflow portion can be formed to protrude linearly outward from the outer circumferential surface of the cap in a direction intersecting with the circumferential direction of the cap.

[0035] The second washing water inlet / outlet portion can be arranged at the opposite end to the end of the housing connected to the cap. The second washing water inlet / outlet portion can be formed to protrude outward from the outer circumferential surface of the housing in a direction intersecting the circumferential direction of the housing.

[0036] The dishwasher may also include a base positioned below the drum.

[0037] The dishwasher may also include a mounting section set in the base.

[0038] The dishwasher may also include a sub-plate mounted on the mounting portion, which is configured to be removable from the mounting portion. A condenser may be mounted on the sub-plate.

[0039] The dishwasher may further include: a compressor in fluid communication with the condenser and configured to compress the refrigerant; an expansion device in fluid communication with the condenser and configured to expand the refrigerant; and an evaporator in fluid communication with the expansion device and configured to evaporate the refrigerant. The compressor, the expansion device, and the evaporator may be mounted on a sub-plate.

[0040] The dishwasher may further include a water collector disposed below the tub and configured to store wash water therein; and a wash pump in fluid communication with the water collector and configured to deliver the wash water. The water collector and the wash pump may be mounted on the mounting portion.

[0041] The water collector and the washing pump can be arranged in the central area of ​​the installation section.

[0042] The auxiliary plate can be installed on the mounting section in a location that avoids the water collection tank and the washing pump. At least a portion of the auxiliary plate can be arranged in the front area of ​​the mounting section.

[0043] The expansion device and the evaporator can be arranged to overlap each other in the vertical direction of the dishwasher. The expansion device with a relatively small volume can be arranged on top of the evaporator with a relatively large volume.

[0044] The support plate on which the expansion device is mounted can be positioned between the expansion device and the evaporator.

[0045] The washing pump may include a water discharge section that is in fluid communication with either a first washing water inlet / outlet section or a second washing water inlet / outlet section and is configured to selectively supply washing water to the condenser.

[0046] The dishwasher may also include a filter installed at the water collector and configured to filter the wash water to be collected in the water collector, wherein through-holes are formed in the filter for the wash water to flow through. A first distance, defined as the shortest straight-line distance between the inner surface of the housing and the outer surface of the outermost cylindrical structure among a plurality of cylindrical structures, can be set to be equal to or greater than the diameter of each through-hole in the through-holes.

[0047] The second distance, defined as the shortest straight-line distance between adjacent cylindrical structures in a plurality of cylindrical structures spaced apart from each other in the diametrical direction of the shell, can be set to be equal to or greater than the diameter of each through hole in the through hole.

[0048] The third distance, defined as the shortest straight-line distance between adjacent coils in the longitudinal direction of the housing, can be set to be equal to or greater than the diameter of each through hole in the through hole.

[0049] In the dishwasher according to this disclosure, the tubes are wound to form multiple cylindrical structures, which are arranged to be spaced apart from each other in the diametrical direction of the housing, and thus the total length of the tubes within the condenser can be significantly increased. Consequently, the heat exchange area of ​​the tubes in the condenser can be significantly increased. Furthermore, the duration for which the refrigerant remains in the condenser can be significantly increased. Therefore, the heat exchange performance between the refrigerant and the washing water in the condenser can be significantly improved.

[0050] Furthermore, in the dishwasher according to this disclosure, since the first washing water inlet / outlet portion and the second washing water inlet / outlet portion are respectively provided on the edges of the outer circumferential surfaces of the housing and the cap, the washing water introduced into the condenser can flow in a vortex shape or a spiral shape.

[0051] Due to this flow pattern of the wash water, convective heat transfer can actively occur within the condenser. Therefore, the wash water can achieve a uniform temperature distribution throughout the condenser.

[0052] This prevents a temperature difference between the wash water temperature in the part of the condenser that contacts the tubes and the wash water temperature in the part of the condenser that does not contact the tubes. Therefore, the heat exchange performance of the condenser can be effectively improved.

[0053] Furthermore, in the dishwasher according to this disclosure, all components of the heat pump system are housed on a sub-plate, and the sub-plate, having an area much smaller than that of the mounting portion, can be removed from the mounting portion. Therefore, maintenance of the components of the heat pump system can be performed easily and smoothly.

[0054] Furthermore, in the dishwasher according to this disclosure, a first distance, defined as the shortest straight-line distance between the inner surface of the housing and the outer surface of the outermost cylindrical structure of the tube, can be equal to or greater than the maximum diameter of the foreign object introduced into the condenser. Therefore, the foreign object can flow smoothly through the washing water flow space, which is larger than the size of the foreign object, and will not adhere to the surface of the housing or tube. This effectively prevents the accumulation of foreign objects in the washing water flow space of the condenser.

[0055] As described above, since the tube is wound to form multiple cylindrical structures, foreign objects can also be trapped between the outer surfaces of the cylindrical structures. Therefore, the second distance, which is the shortest distance between the outer surfaces of the cylindrical structures that are spaced apart from each other in the diametrical direction of the shell, can be equal to or greater than the diameter of each through hole in the through hole, because the first distance is equal to or greater than the diameter of each through hole in the through hole.

[0056] Therefore, foreign matter can flow smoothly in the space between adjacent coils, where the space is larger than the size of the foreign matter, and can avoid adhering to the outer surface of the coils. This effectively prevents foreign matter from accumulating in the wash water flow space of the condenser 300.

[0057] In the condenser, foreign matter can also be trapped between adjacent coils. Therefore, the third distance between adjacent coils can be equal to or greater than the diameter of the through-hole, since the first distance is equal to or greater than the diameter of each through-hole in the through-hole.

[0058] Therefore, foreign matter can flow smoothly in the space between adjacent coils, where the space is larger than the size of the foreign matter, and can avoid adhering to the outer surface of the coils. This effectively prevents foreign matter from accumulating in the condenser's wash water flow space.

[0059] In addition to the effects described above, the specific effects of this disclosure will be described together with the description of the specific matters used to implement this disclosure. Attached Figure Description

[0060] Figure 1 This is a cross-sectional view of a dishwasher according to an embodiment.

[0061] Figure 2A This is a diagram illustrating the components arranged in the base of a dishwasher according to an embodiment.

[0062] Figure 2B This is a plan view illustrating the lid of a bucket.

[0063] Figure 3 This is a perspective view illustrating the mounting portion with a condenser installed according to an embodiment.

[0064] Figure 4This is a perspective view illustrating a condenser according to an embodiment.

[0065] Figure 5 This is a three-dimensional view showing the tubes arranged in the condenser.

[0066] Figure 6 This is a cross-sectional view of the condenser.

[0067] Figure 7 It is the condenser in relation to Figure 6 Observe the cross-sectional views of the condenser from different directions.

[0068] Figure 8A This diagram uses arrows to show the flow of wash water in the condenser.

[0069] Figure 8B This is a diagram illustrating another embodiment of the condenser.

[0070] Figure 9 The diagram shows a cross-section of the washing water flowing through the condenser, indicated by arrows.

[0071] Figure 10 This is a plan view illustrating the state of the sub-plate being installed on the mounting section.

[0072] Figure 11 This diagram illustrates the state where the sub-plate has been removed from the mounting section.

[0073] Figure 12 This is a diagram illustrating a washing pump according to an embodiment.

[0074] Figure 13 This is a diagram showing the connection between the washing pump and the condenser. Detailed Implementation

[0075] The aforementioned objects, features, and advantages will be described in detail below with reference to the accompanying drawings, so that those skilled in the art to which this disclosure pertains can easily practice the technical ideas of this disclosure. In describing this disclosure, detailed descriptions of well-known technologies related to this disclosure will be omitted where it is determined that such detailed descriptions might unnecessarily obscure the main points of this disclosure. Hereinafter, preferred embodiments of this disclosure will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals are used to denote the same or similar components.

[0076] Although terms such as "first" and "second" are used to describe various components, these components are not limited by these terms. These terms are only used to distinguish one component from another, and unless there is an explicit statement to the contrary, "first component" can also be "second component".

[0077] Throughout this document, unless otherwise stated, each part may be singular or plural.

[0078] As used herein, unless the context clearly indicates otherwise, singular expressions include plural expressions. In this application, terms such as “consisting of” or “comprising” should not be construed as necessarily including all of the components or steps described herein, but should be interpreted as possibly excluding some of the components or steps, and may also include additional components or steps.

[0079] Throughout this disclosure, unless otherwise stated, “A and / or B” means A, B or A and B, and unless otherwise stated, “C to D” means including C to D.

[0080] As used in this article, terms such as “upper,” “lower,” and “side” are used to refer to a portion of the dishwasher in its normally installed state, or in one direction.

[0081] Figure 1 This is a cross-sectional view of a dishwasher according to an embodiment. The dishwasher according to the embodiment may include: a housing 11 that defines the appearance of the dishwasher; a tub 12 in which dishes to be washed are housed; a door 20 disposed on the front surface of the tub 12 to open and close the tub 12; and a water collector 100 disposed below the tub 12 to store washing water therein.

[0082] The dishwasher may also include: a plurality of spray arms 13, 14 and 15 disposed in a tub 12 and spraying wash water; a filter 110 disposed in a water collector 100 and filtering the wash water sprayed from at least one of the plurality of spray arms 13, 14 and 15 and returning it to the water collector 100; a wash pump 150 that delivers wash water stored in the water collector 100; and a switching valve 130 that controls the selective flow of wash water delivered by the wash pump 150 to at least one of the plurality of spray arms 13, 14 and 15.

[0083] The tub 12 can be formed into a hexahedral shape with an open front surface and can have a washing chamber 12a defined therein. A connecting hole is formed in the bottom portion 12b of the tub 12, through which washing water flows into the water collector 100. In the washing chamber 12a, a plurality of shelves 16 and 17 are arranged therein, which accommodate washing objects. The plurality of shelves 16 and 17 may include a lower shelf 16 arranged in the lower region of the washing chamber 12a and an upper shelf 17 arranged in the upper region of the washing chamber 12a. The lower shelf 16 and the upper shelf 17 are arranged to be spaced apart from each other in the vertical direction and can slide in the forward direction of the tub 12 and extend from the tub 12.

[0084] Multiple spray arms 13, 14, and 15 are arranged vertically. The multiple spray arms may include: a lower spray arm 13, which is arranged at the lowest end and sprays washing water upward toward the lower shelf 16; an upper spray arm 14, which is arranged on top of the lower spray arm 13 and sprays washing water upward toward the upper shelf 17; and a top spray arm 15, which is arranged at the upper end of the washing chamber 12a and on top of the upper spray arm 14, and sprays washing water downward.

[0085] Multiple spray arms 13, 14, and 15 are supplied with washing water from the washing pump 150 via multiple spray arm connection flow paths 18, 19, and 21. The multiple spray arm connection flow paths 18, 19, and 21 may include: a lower spray arm connection flow path 18, which connects to the lower spray arm 13; an upper spray arm connection flow path 19, which connects to the upper spray arm 14; and a top spray arm connection flow path 21, which connects to the top spray arm 15.

[0086] The lower spray arm 13, the upper spray arm 14, and the top spray arm 15 can be supplied with washing water from the washing pump 150 through the lower spray arm connecting flow path 18, the upper spray arm connecting flow path 19, and the top spray arm connecting flow path 21, respectively.

[0087] The water collector 100 can be arranged below the bottom portion 12b of the tub 12 and can collect washing water. The filter 110 can filter out contaminants from the washing water flowing from the tub 12 to the water collector 100.

[0088] Wash water sprayed by multiple spray arms 13, 14 and 15, along with contaminants deposited on and removed from the target object, falls into the bottom portion 12b of the tank 12. Thus, the contaminant-containing wash water can be filtered as it flows through a filter 110 connected to the bottom portion 12b of the tank 12, allowing contaminant-free wash water to be stored in the collector 100.

[0089] During the washing operation, the washing water circulates through the water collector 100, spray arms 13 to 15, tub 12 and filter 110, while washing the tableware contained in shelves 16 and 17.

[0090] Washing pump 150 supplies washing water stored in water collector 100 to at least one of a plurality of spray arms 13, 14 and 15. Washing pump 150 may include a washing motor that generates rotational force and an impeller that is rotated by the washing motor to deliver washing water. Washing pump 150 may be connected to switching valve 130 and washing water supply flow path 180.

[0091] When the washing pump 150 is operating, the washing water stored in the water collector 100 can be introduced into the washing pump 150 through the water collection flow path 170, and then delivered to the switching valve 130 through the washing water supply flow path 180.

[0092] The switching valve 130 selectively supplies washing water, delivered by the washing pump 150, to at least one of the lower spray arm 13, the upper spray arm 14, and the top spray arm 15. The switching valve 130 can selectively connect the washing water supply flow path 180 to at least one of the multiple spray arm connection flow paths 18, 19, and 21.

[0093] The water collector 100 is connected to a water supply flow path 23 through which washing water supplied from an external water source flows. A water supply valve 22 for controlling the flow rate of washing water supplied from the external water source can be installed in the water supply flow path 23. The water supply valve 22 controls the amount of washing water supplied from the external water source to the water collector 100. When the water supply valve 22 is opened, washing water supplied from the external water source can be introduced into the water collector 100 through the water supply flow path 23.

[0094] The water collector 100 can be connected to a drain flow path 24 for discharging washing water to the outside of the dishwasher. A drain pump 25 can be installed in the drain flow path 24 for discharging washing water from the water collector 100 through the drain flow path 24. When the drain pump 25 operates, the washing water stored in the water collector 100 can be discharged to the outside of the housing 11 through the drain flow path 24.

[0095] The heating device for heating the washing water can be housed inside the water collector 100 or in the washing pump 150. This heating device can be, for example, an electric heater, a heat pump system, etc.

[0096] In this implementation, a heat pump system can be used to heat the wash water. This heat pump system will be described first below.

[0097] A heat pump system is a system that pumps heat from a low-temperature environment to a high-temperature environment. In this regard, a compressor 500 can be used, for example, to achieve the heat pumping. In one implementation, the heat pump system can be implemented using a so-called two-phase flow refrigeration cycle, which raises the temperature of the refrigerant by compressing the two-phase flowing refrigerant into a gaseous state using the compressor 500.

[0098] A heat pump system for performing a two-phase flow refrigeration cycle may include a compressor 500, a condenser 300, an expander, and an evaporator 600. These components are interconnected via piping. As the refrigerant flows and circulates through these components, its phase and temperature change, allowing it to absorb or release heat from the surrounding environment.

[0099] The refrigerant can be introduced into the compressor 500 in a low-temperature gaseous state. The refrigerant is compressed in the compressor 500. From the outlet of the compressor 500, the refrigerant can be introduced into the condenser 300 in a high-temperature and high-pressure superheated gaseous state.

[0100] The condenser 300 can be arranged below the tank 12. Wash water and refrigerant can flow in the condenser 300.

[0101] The refrigerant and the wash water can flow separately in the condenser 300. The refrigerant can be introduced into the condenser 300 and exchange heat with the wash water, and the wash water can be heated after receiving heat from the refrigerant.

[0102] In condenser 300, the refrigerant can undergo a phase change from a superheated gaseous state to a saturated state in which liquid and gas coexist, while the refrigerant is maintained at the theoretically same pressure.

[0103] The refrigerant flows into the condenser 300 in a superheated state, transferring heat to the wash water and thus lowering its temperature. Then, as the refrigerant reaches saturation, the liquid content can be gradually increased while the refrigerant is theoretically maintained at a constant temperature. During this liquefaction process, the refrigerant releases a large amount of latent heat of liquefaction, which the wash water absorbs and is then heated.

[0104] The refrigerant from the condenser 300 can be introduced into the expansion device in a saturated liquid or super-cooled liquid state. This expansion device can be configured as, for example, an expansion valve or a capillary tube device.

[0105] The refrigerant may undergo adiabatic expansion, meaning that its entropy remains theoretically constant within the expansion device. During this expansion, a portion of the refrigerant vaporizes, thus potentially reducing its pressure. As this portion of the refrigerant vaporizes to dissipate its heat of vaporization to the surrounding environment, the overall temperature of the refrigerant may decrease. In other words, the refrigerant can be introduced into the evaporator 600 under a low-temperature, low-pressure condition obtained while flowing through the expansion device.

[0106] When refrigerant is introduced into evaporator 600, the proportion of gas in the refrigerant can gradually increase while absorbing heat from the relatively high-temperature environment. Within evaporator 600, the proportion of gas in the refrigerant may gradually increase while theoretically maintaining the same pressure and temperature for the refrigerant.

[0107] The refrigerant discharged from the evaporator 600 can be introduced into the compressor 500 in which a small amount of liquid is present or in a slightly superheated state. The refrigerant introduced into the compressor 500 can circulate through the compressor 500, condenser 300, expansion unit and evaporator 600 while repeating the above process.

[0108] Typically, refrigeration devices utilize the principle that refrigerant absorbs heat in the evaporator 600. The heat pump system of this embodiment can utilize the heat released by the refrigerant in the condenser 300.

[0109] In a heat pump system, heat exchange occurs between the high-temperature refrigerant and the relatively low-temperature wash water in the condenser 300, thereby heating the wash water. The high-temperature wash water heated by the condenser 300 makes it easier to wash or rinse dishes than wash water at room temperature.

[0110] In this respect, the heat pump system does not always need to operate while the dishwasher is washing or rinsing. For example, when washing or rinsing with room temperature water, the compressor 500 does not operate, allowing room temperature water to be sprayed directly onto the dishes without heating the water.

[0111] Even if the compressor 500 stops operating and the wash water is not heated, the wash water can still flow through the condenser 300 and circulate throughout the dishwasher.

[0112] In another embodiment, a bypass flow path can be defined to bypass the condenser 300. Therefore, when the compressor 500 stops operating, the wash water can flow along this bypass flow path to bypass the condenser, thereby improving the performance of the condenser 300 and extending its service life.

[0113] Figure 2A This is a schematic diagram illustrating the components arranged in the base 30 of a dishwasher according to an embodiment. Components constituting the heat pump system may be arranged, for example, below the tub 12.

[0114] The dishwasher may include a base 30 disposed below the tub 12. A heat pump system and other devices for driving the dishwasher may be disposed in the base 30. The base 30 has an internal space defined therein and positioned below the tub 12, and this internal space may be used as a machine room in which various mechanical components are disposed.

[0115] The dishwasher may include a mounting portion 40 on which a condenser 300 is mounted. The mounting portion 40 may be arranged in the base 30. The mounting portion 40 may be arranged below the tub 12.

[0116] The mounting portion 40 can be generally formed as a plate. Various components can be attached to the upper surface of the mounting portion 40.

[0117] The mounting portion 40 can be disposed inside the base 30. The mounting portion 40 can be easily removed from the base 30. For example, the mounting portion 40 can be mounted to the base 30 using a fastening device. This fastening device can be loosened, and the mounting portion 40 can be removed as follows: Figure 2A As indicated by the arrow, it moves in a sliding manner, thus allowing it to be removed from the base 30.

[0118] While the mounting portion 40 is guided by guide rails formed on the inner surface of the base 30, the mounting portion can slide to extend from the base 30.

[0119] The condenser 300 can be arranged on the mounting portion 40. The refrigerant and wash water can flow separately in the condenser 300. The refrigerant can be condensed in the condenser 300. The refrigerant can be condensed to release its latent heat of condensation, allowing the wash water to be heated by the heat released by the refrigerant.

[0120] Although not shown, the expansion valve can be positioned appropriately in the mounting portion 40. Since the expansion valve is smaller than the other components constituting the heat pump system, it can be appropriately positioned within the available space of the mounting portion 40.

[0121] The dishwasher may include a water softening device 41 for generating soft water. The water softening device 41 may be installed on the mounting portion 40. Soft water refers to water containing very few or no minerals (e.g., calcium and magnesium). When using soft water to wash dishes, the washing efficiency can be improved, and the lifespan of the dishes can be extended. Therefore, it is necessary to use soft water to wash dishes as needed.

[0122] In one embodiment, washing water can be introduced into a water softening device 41, and the water can be converted into soft water using the water softening device 41, which can then be used for washing dishes. However, the water softening device 41 is not a necessary component of a dishwasher.

[0123] The water softening device 41 can be connected to the water collector 100 via a pipe. Therefore, water introduced into the water softening device 41 can be softened by the water softening device 41. The softened water discharged from the water softening device 41 can be introduced into the water collector 100 and used for washing dishes.

[0124] The dishwasher may include a water collector 100 therein, which stores washing water. The water collector 100 may be mounted on the mounting portion 40. The water collector 100 may be arranged below the tub 12.

[0125] The washing water stored in the water collector 100 can flow under the operation of the washing pump 150, and can wash the dishes contained in the tub 12 while circulating through the water collector 100, the washing pump 150, the multiple spray arms 13, 14 and 15 and the tub 12.

[0126] In this regard, the washing water is heated by a heat pump system and sprayed at high temperature from multiple spray arms 13, 14 and 15 to wash or rinse the dishes contained in the tub 12, thereby improving washing efficiency.

[0127] Furthermore, a washing pump 150 can be installed on mounting section 40. Additionally, a compressor 500 can be installed on mounting section 40. The compressor 500 can be connected to the condenser 300. The compressor 500 compresses the refrigerant.

[0128] In addition, the evaporator 600 can be installed on the mounting section 40.

[0129] As described above, the compressor 500, condenser 300, expansion device and evaporator 600 that constitute the heat pump system are interconnected by pipes, and the refrigerant may undergo a phase change as it circulates through the components that constitute the heat pump system, resulting in changes in its temperature and pressure.

[0130] In addition, when the washing pump 150 is operating, the washing water can flow sequentially through the washing pump 150, the condenser 300, the multiple spray arms 13, 14 and 15, the tank 12 and the water collector 100, and can be reintroduced into the washing pump 150 and circulated through the above-mentioned components again.

[0131] Figure 2B This is a plan view showing the lid 12c of the bucket 12. The lid 12c can form part of the bottom portion 12b of the bucket 12. The lid 12c can separate the bucket 12 from the water collector 100. The lid 12c can be removably attached to the bucket 12.

[0132] The cover 12c can be connected to the filter 110. Therefore, removing the cover 12c from the container 12 will also allow the filter 110 to be removed from the container 12 together with the cover.

[0133] The lid 12c can be used as a screen filter. The surface of the lid 12c has a mesh structure with smaller gaps than the mesh of the filter 110, allowing water from the bucket 12 to be drained into the water collector 100 located below it, and it can also function as a filtration device. However, the mesh surface of the lid is not shown in the accompanying drawings because the mesh is very fine. This mesh surface of the lid is only used to aid drainage. The filter 110 functions as a basic filtration device for filtering the wash water circulating in the dishwasher.

[0134] A mesh-like connecting section can be formed on the top of the filter 110. Washing water sprayed from the tub 12 and used for washing dishes, dripping onto the bottom portion 12b of the tub 12, can be introduced into the collector 100 through the connecting section. The connecting section can have multiple through holes 111 through which washing water flows. The multiple through holes 111 can be arranged to be spaced apart from each other in the column and row directions in the plan view of the connecting section.

[0135] The through-holes 111 can be used to filter out foreign matter that accumulates on the bottom portion 12b of the tub 12, thus preventing foreign matter from being introduced into the water collector 100. However, if the diameter of each through-hole in the through-holes 111 is too small, the washing water may not flow smoothly into the water collector 100. Therefore, some small-sized foreign matter contained in the washing water can pass through the through-holes 111 and be introduced into the water collector 100.

[0136] Because foreign matter contained in the washing water introduced into the water collector 100 circulates through the washing water circulation system, it can be introduced into the condenser 300. When these foreign matter accumulates inside the condenser 300, it may interfere with the heat exchange between the refrigerant and the washing water in the condenser 300, and may also interfere with the flow of the washing water.

[0137] Therefore, it is necessary to prevent such foreign matter from accumulating in the condenser 300 instead of being discharged from the condenser 300. The relevant structure will be described in detail below with reference to the accompanying drawings.

[0138] Figure 3 This is a perspective view illustrating the mounting portion 40 on which the condenser 300 is mounted, according to an embodiment. Figure 4 This is a perspective view illustrating a condenser 300 according to an embodiment.

[0139] The dishwasher may include a tub 12 in which dishes are housed. The dishwasher may include a condenser 300 disposed below the tub 12. Wash water and refrigerant may flow separately within the condenser 300. The wash water and refrigerant may exchange heat with each other while flowing separately within the condenser 300.

[0140] The condenser 300 according to an embodiment may include a housing 310 defining an external shape. The housing 310 may be configured such that wash water and refrigerant flow separately within the housing 310.

[0141] The condenser 300 may include pipes 320 housed within a housing 310. Refrigerant may flow through pipes 320.

[0142] Figure 5 This is a perspective view illustrating the tube 320 arranged in the condenser 300. Figure 6 This is a cross-sectional view of condenser 300.

[0143] The tube 320 may have a structure in which the individual tube sections are wound in a spiral coil manner 321. Due to this structure, the outer surface area of ​​the tube 320 can be effectively increased. Therefore, the heat exchange area between the refrigerant flowing through the tube 320 and the washing water flowing through the housing 310 can be increased. Thus, the heat exchange performance between the refrigerant and the washing water can be improved.

[0144] Furthermore, due to this structure, the flow path length of the refrigerant within the condenser 300 can be significantly increased. Therefore, the refrigerant flow rate within the condenser 300 can be increased, and the duration of refrigerant residence within the condenser 300 can be increased. Consequently, the heat exchange performance between the refrigerant and the washing water can be improved.

[0145] In addition, when the length of the tube 320 in the condenser 300 is further increased to further increase the heat exchange area and the refrigerant residence time, the heat exchange performance between the refrigerant and the wash water can be further improved.

[0146] Therefore, in one embodiment, the tube 320 can be wound to form a plurality of cylindrical structures, which are arranged sequentially around the center of the housing 310 and spaced apart from each other in the diametrical direction of the housing 310.

[0147] For example, tube 320 may include a generally cylindrical first cylindrical structure, in which a first tube portion is wound around its center at a first predetermined position in the diametrical direction of housing 310. Tube 320 may include a generally cylindrical second cylindrical structure, in which a second tube portion is wound around its center at a second predetermined position outward from the first predetermined position in the diametrical direction of housing 310. Thus, tube 320 may include an nth cylindrical structure of generally cylindrical shape, in which an nth tube portion is wound around its center at a nth predetermined position outward from the (n-1)th predetermined position in the diametrical direction of housing 310.

[0148] In this respect, multiple cylindrical structures, for example, are... Figure 6The example is illustrated as three cylindrical structures. However, embodiments of this disclosure are not limited to this. Considering the volume of the housing 310, the cross-sectional area of ​​the tube 320, etc., the plurality of cylindrical structures may be configured as two cylindrical structures or four or more cylindrical structures.

[0149] Because the tubes 320 have multiple cylindrical structures arranged spaced apart from each other in the diametrical direction of the shell 310, the total length of the tubes 320 in the condenser 300 can be significantly increased. Therefore, the heat exchange area of ​​the tubes 320 in the condenser 300 can be significantly increased. Furthermore, the duration of refrigerant residence in the condenser 300 can be significantly increased. Therefore, the heat exchange performance between the refrigerant and the washing water in the condenser 300 can be significantly improved.

[0150] Each of the multiple tube sections constituting tube 320 can be wound to form multiple coils 321 spaced apart from each other in the longitudinal direction of condenser 300. Due to this structure, the coils 321 constituting each of the multiple cylindrical structures as described above can extend continuously in the longitudinal direction of condenser 300.

[0151] The coils 321 can be arranged in a staggered manner along the diameter of the condenser 300, such that the overlapping area of ​​adjacent coils 321 in the diameter of the condenser 300 is reduced. Therefore, the spacing between adjacent coils 321 in the diameter of the housing can be increased.

[0152] Therefore, the spacing between adjacent coils 321 in the diameter direction of the casing can be greater than the spacing D3 between adjacent coils in the longitudinal direction of the casing. Compared to the case where the coils 321 are arranged in a non-staggered manner in the radial direction of the casing, this structure can reduce the overall volume of the coils 321. This can reduce the internal flow resistance in the condenser 300 and effectively prevent foreign matter from being trapped inside the condenser 300.

[0153] However, in another embodiment, taking into account various design conditions such as ease of manufacture, the coils 321 can be arranged in a row or in a non-staggered manner in the diametrical direction of the housing.

[0154] Figure 7 It is the condenser 300 in relation to Figure 6 Observe the cross-sectional views of the condenser from different directions.

[0155] The structure in which tube 320 is wound to form a plurality of cylindrical structures arranged sequentially and spaced apart from each other in the diametrical direction of the shell can be formed, for example, in the following manner.

[0156] Each of the tube portions constituting the first to the nth tube portions of the shell extends along the length direction of the shell and is wound in a spiral manner to form each of the first to the nth cylindrical structures. The first to the nth cylindrical structures are arranged sequentially and are spaced apart from each other in the diameter direction of the shell.

[0157] In this respect, the first cylindrical structure can be the innermost cylindrical structure, and the nth cylindrical structure can be the outermost cylindrical structure. Therefore, the diameter of the first cylindrical structure is the smallest, while the diameter of the nth cylindrical structure can be the largest.

[0158] like Figure 7 As illustrated, when the cross-section of the condenser 300 in the diametrical direction is viewed in a direction parallel to the longitudinal direction of the condenser 300, the tube 320 can be shown as a structure wound in a spiral shape.

[0159] For example, the outer part of tube 320 extends continuously in the length direction of the shell, thereby spirally winding in the outer region in the diameter direction of the shell to form an outer cylindrical structure with a large diameter.

[0160] Furthermore, as the outer portion of tube 320 extends continuously along the length of the shell, thus spiraling around the outer region of the shell in the diametrical direction, the outer diameter of the tube can remain constant. As the outer cylindrical structure extends along the length of the shell, the diameter of the outer cylindrical structure can also be constant.

[0161] For example, the interior of tube 320 extends continuously along the length of the shell, thereby spirally winding around the interior region in the diameter direction of the shell to form an internal cylindrical structure with a small diameter.

[0162] Furthermore, as the interior of tube 320 extends continuously along the length of the shell, it spirally winds around the interior region in the diameter direction of the shell, allowing the internal diameter of the tube to remain constant. Similarly, as the internal cylindrical structure extends along the length of the shell, the diameter of the internal cylindrical structure can also be constant.

[0163] In other words, the tube portions constituting the first to nth tube portions of tube 320 extend along the length of the shell and are wound in a spiral manner to form the first to nth cylindrical structures, which are arranged sequentially and spaced apart from each other in the diameter direction of the shell. In this case, as the first to nth cylindrical structures are arranged outward from the center of the shell along the radial direction of the shell in this order, the diameters of the first to nth cylindrical structures can increase sequentially.

[0164] Furthermore, as each of the cylindrical structures from the first to the nth cylindrical structure extends along the length of the shell, the diameter of each of the cylindrical structures from the first to the nth cylindrical structure can be constant.

[0165] Due to this structure, such as Figure 6 As shown, when viewed from the diameter direction of the housing 310 of the condenser 300, the cross section of the housing 310 of the condenser 300 along the length direction shows that the tube 320 can be formed such that a plurality of coils 321 wound in a spiral manner constitute each of a plurality of cylindrical structures arranged on the diameter of the housing.

[0166] In another embodiment, the tube 320 may extend in the length direction of the housing, thereby spiraling around the center of the housing 310 to form a cylindrical structure, such that the diameter of the cylindrical structure gradually increases as the cylindrical structure extends in the longitudinal direction of the condenser 300.

[0167] Therefore, multiple cylindrical structures can be arranged to be spaced apart from each other in the diameter direction of the shell, such that the diameter of each cylindrical structure in the cylindrical structure of tube 320 gradually increases as each cylindrical structure extends in the longitudinal direction of condenser 300.

[0168] Furthermore, the diameter of each cylindrical structure reaches its maximum value at a specific position along the length of the shell. From this specific position, each cylindrical structure extends further along the length of the shell, such that the diameter of each cylindrical structure in the cylindrical structure of tube 320 gradually decreases as each cylindrical structure extends along the longitudinal direction of condenser 300.

[0169] As each cylindrical structure in the cylindrical structure of tube 320 extends along the entire length of condenser 300 in the length direction of condenser 300, sections with gradually decreasing diameters and sections with gradually increasing diameters of each cylindrical structure in the cylindrical structure of tube 320 can be repeatedly arranged in the length direction of the shell.

[0170] In addition, in order to further increase the total length of the tube 320 in the condenser 300, the tube 320 extends from one side of the condenser 300 to the other side in the longitudinal direction of the condenser 300 in a spiral winding manner, and extends from the other side to one side in the longitudinal direction of the condenser 300 in a spiral winding manner again.

[0171] When the tube 320 is wound in this way, it can be formed into a very dense coil 321 within the shell 310 of the condenser 300. Therefore, the length and heat exchange area of ​​the tube 320 in the condenser 300 can be significantly improved.

[0172] Due to the winding structure of tube 320, the length and heat exchange area of ​​tube 320 in condenser 300 can be significantly improved.

[0173] The condenser 300 may include a cap 325 detachably connected to an open side of the housing 310. A refrigerant inlet portion 331 and a refrigerant outlet portion 332 through which the pipe 320 passes may be formed on the cap 325.

[0174] The refrigerant inlet portion 331 and the refrigerant outlet portion 332 can be arranged on the same side of the condenser 300, so that the total extension length of the tubes 320 in the condenser 300 can be further increased compared to the case where the refrigerant inlet portion 331 and the refrigerant outlet portion 332 are respectively arranged on two opposite sides along the length of the condenser 300. Therefore, as described above, the heat exchange performance of the condenser 300 can be effectively improved.

[0175] The housing 310 can be configured as a cylindrical shape in which a hollow space is formed. The cap 325 connected to the housing 310 can have a cross-sectional shape corresponding to the diameter of the housing 310.

[0176] The cap 325 may include a closed end portion 3251 attached to the housing 310 to close one side of the housing 310.

[0177] The cap 325 may include an extended connecting portion 3252, which is formed as a hollow cylindrical shape extending circumferentially from the closed end portion 3251 in the longitudinal direction of the housing. The extended connecting portion 3252 may be attached to the outer circumferential surface of the housing 310.

[0178] The extension connection portion 3252 and the housing 310 can be connected to each other, for example, by an interference fit. In another example, the extension connection portion 3252 and the housing 310 can be connected to each other by a helical connection.

[0179] In addition, a sealing member can be provided between the extension connection portion 3252 and the housing 310 to effectively suppress water leakage between the extension connection portion 3252 and the housing 310.

[0180] Due to the structure of the cap 325 and housing 310 described above, the cap 325 can be easily removed from and attached to the housing 310. Therefore, for repairing the condenser 300 or removing foreign matter accumulated in the condenser 300, the operator can easily remove the cap 325 and housing 310. This provides convenience for workers.

[0181] Figure 8A The diagram shows the flow of washing water in condenser 300, indicated by arrows. Figure 8BThis is a diagram illustrating another embodiment of the condenser.

[0182] Figure 9 This is a cross-sectional view showing the flow of wash water in condenser 300, indicated by arrows. Figure 8A , Figure 8B and Figure 9 In the diagram, the shape and direction of the washing water flow are indicated by arrows.

[0183] The wash water can flow in the space other than that occupied by the pipe 320 inside the housing 310 to exchange heat with the refrigerant. The condenser 300 may be provided with a wash water inlet / outlet section through which the wash water is introduced into the cap 325 and the housing 310 and discharged from the cap 325 and the housing 310.

[0184] The condenser 300 may include a first wash water inlet / outlet portion 326 formed to extend through the cap 325. Wash water can be introduced into or discharged from the housing through the first wash water inlet / outlet portion 326.

[0185] The condenser 300 may include a second wash water inlet / outlet portion 327, which is formed to extend through the housing 310. Wash water can be introduced into or discharged from the housing through the second wash water inlet / outlet portion 327.

[0186] Wash water can be introduced into the housing through the first wash water inlet / outlet portion 326 and discharged from the housing through the second wash water inlet / outlet portion 327. Alternatively, wash water can be introduced into the housing through the second wash water inlet / outlet portion 327 and discharged from the housing through the first wash water inlet / outlet portion 326. The inlet / outlet positions of the wash water in the condenser 300 can be appropriately selected according to the design.

[0187] Reference Figure 8A In the condenser 300 according to the embodiment, the refrigerant inlet portion 331 and the refrigerant outlet portion 332 may be formed on one side of the condenser 300, for example, cap 325.

[0188] Reference Figure 8B In another embodiment of the condenser 300, the refrigerant inlet portion 331 and the refrigerant outlet portion 332 may be formed on two opposite sides along the length of the condenser 300. For example, the refrigerant inlet portion 331 and the refrigerant outlet portion 332 may be formed on the cap 325 and the housing 310, respectively.

[0189] exist Figure 8A and Figure 8BThe positions of the refrigerant inlet portion 331 and the refrigerant outlet portion 332 illustrated in the figure can be appropriately selected taking into account the arrangement, position, and total length of the portion of the pipe 320 outside the condenser 300.

[0190] exist Figure 8A , Figure 8B and Figure 9 In this process, washing water can be introduced into the first washing water inlet / outlet portion 326, and washing water can be discharged from the second washing water inlet / outlet portion 327.

[0191] Conversely, as will be described later... Figure 13 In this process, washing water can be introduced into the second washing water inlet / outlet portion 327, and washing water can be discharged from the first washing water inlet / outlet portion 326.

[0192] The first washing water inflow / outflow portion 326 can be formed to protrude outward in a straight line from the outer circumferential surface of the cap 325 in a direction intersecting with the circumferential direction of the cap 325.

[0193] The second washing water inlet / outlet portion 327 can be arranged at the opposite end of the housing 310 to the end connected to the cap 325. The second washing water inlet / outlet portion 327 can be formed to protrude outward from the outer circumferential surface of the housing 310 in a direction intersecting the circumferential direction of the housing 310.

[0194] Since the first washing water inflow / outflow portion 326 and the second washing water inflow / outflow portion 327 are respectively provided on the edges of the outer circumferential surfaces of the cap 325 and the housing 310, the washing water introduced into the condenser 300 can flow in a vortex or spiral shape.

[0195] Due to this flow pattern of the wash water, convective heat transfer of the wash water in the condenser 300 can occur actively. Therefore, the wash water can have a uniform temperature distribution throughout the condenser 300.

[0196] This prevents a temperature difference between the temperature of the wash water in the part of the condenser 300 that contacts the tube 320 and the temperature of the wash water in the part of the condenser 300 that does not contact the tube 320. Therefore, the heat exchange performance of the condenser 300 can be effectively improved.

[0197] Figure 10 This is a plan view illustrating the state in which the sub-plate 42 is mounted on the mounting portion 40. Figure 11 This diagram illustrates the state where the sub-plate 42 has been removed from the mounting section 40.

[0198] The dishwasher may include a base 30 disposed below the tub 12.

[0199] The dishwasher may include a mounting portion 40 arranged in the base 30. The condenser 300 may be mounted on the mounting portion 40.

[0200] The dishwasher may include a sub-plate 42 disposed on the mounting portion 40. The sub-plate 42 may be configured to be removable from the mounting portion 40. A condenser 300 may be disposed on the sub-plate 42.

[0201] The sub-plate 42 can generally be formed in a plate shape. Components constituting the heat pump system can be mounted on the sub-plate 42. As described above, the condenser 300 can be mounted on the sub-plate 42.

[0202] Additionally, a compressor 500, which communicates with the condenser 300 and compresses the refrigerant, can be arranged on the sub-plate 42. An expansion device 700, which communicates with the condenser 300 and expands the refrigerant, can be arranged on the sub-plate 42. An evaporator 600, which communicates with the expansion device 700 and evaporates the refrigerant, can be arranged on the sub-plate 42.

[0203] That is, the compressor 500, condenser 300, expansion device 700 and evaporator 600 that constitute the heat pump system can be arranged on the sub-plate 42.

[0204] All components of a heat pump system require continuous maintenance to maintain their performance. For example, the compressor 500 has components that rotate at high speeds, making it susceptible to failure and requiring servicing for proper operation. Furthermore, there is a possibility of refrigerant leakage, and it may be necessary to replenish refrigerant into the heat pump system.

[0205] For this reason, the individual components of the heat pump system can be removed from the base 30 for maintenance.

[0206] If all the components of the heat pump system are fixedly mounted on the mounting portion 40, then the entire mounting portion 40, which has a relatively large area, needs to be removed from the base 30, where components such as the washing pump 150 and the water collector 100 are installed. This causes inconvenience to the operator.

[0207] Therefore, when the heat pump system can be pulled out or extended separately from the base 30, the maintenance and repair of the components of the heat pump system can be very convenient.

[0208] Therefore, in this embodiment, all heat pump system components can be arranged on the sub-plate 42, and the sub-plate 42, having an area much smaller than that of the mounting portion 40, can be removed from the mounting portion 40. Thus, maintenance of the heat pump system components can be performed easily and smoothly.

[0209] Sub-plate 42 can be arranged on mounting portion 40. Sub-plate 42 can slide on and along mounting portion 40 to be mounted on mounting portion 40, or easily removed from mounting portion 40.

[0210] In this respect, the sub-plate 42 can be stably connected to the mounting portion 40 via a connecting mechanism such as screws. Therefore, the components arranged on the sub-plate 42 can be stably mounted on the mounting portion 40 and can operate in a stable manner. By disassembling the connecting mechanism, the sub-plate 42 can be easily removed from the mounting portion 40.

[0211] A water collector 100, located below the tub 12 and storing the washing water therein, can be installed on the mounting portion 40. A washing pump 150, which is in fluid communication with the water collector 100 and delivers the washing water, can be installed on the mounting portion 40.

[0212] The water collector 100 can occupy a large space on the mounting portion 40, and the washing pump 150 can be arranged on the mounting portion 40 adjacent to the water collector 100. The water collector 100 can be arranged in the central area of ​​the mounting portion 40.

[0213] Therefore, the sub-plate 42 needs to have a suitable structure so that the sub-plate 42 can be easily removed from the mounting portion 40 without interfering with the water collector 100 and washing water, which occupy a large space on the mounting portion and are arranged in the central area of ​​the mounting portion 40.

[0214] The water collector 100 and the washing pump 150 can be arranged on the central part of the mounting section 40.

[0215] The auxiliary plate 42 can be positioned away from the water collector 100 and the washing pump 150. At least a portion of the auxiliary plate 42 can be arranged to overlap with the front area of ​​the mounting portion 40.

[0216] like Figure 10 and Figure 11 As shown, a portion of the sub-plate 42 may overlap with, for example, the front region of the mounting portion 40, while another portion may overlap with a side region of the mounting portion. Therefore, the entire sub-plate can be configured in an "L" shape. Due to this shape, the sub-plate 42 can be mounted on the mounting portion 40 to avoid the water collector 100 and the condenser 300.

[0217] Dishwashers are typically installed indoors in a built-in manner. Therefore, when the dishwasher is not being moved, only the front of the dishwasher is exposed to the user.

[0218] Therefore, the sub-plate 42 can be pulled out or extended from the dishwasher in a forward direction to access the components of the heat pump system mounted thereon. This is very convenient for the operator or user.

[0219] In one embodiment, at least a portion of the sub-plate 42 can be arranged to overlap with the front of the mounting portion 40. Therefore, when a user or operator in front of the dishwasher opens the front cover that covers the base 30 in the front area of ​​the dishwasher, the front of the sub-plate 42 is directly grasped by the user or operator's hand, allowing the sub-plate 42 to be easily pulled out from or extended from the base 30 and mounting portion 40. This provides convenience for operation.

[0220] The expansion unit 700 and the evaporator 600 can be arranged to overlap each other in the vertical direction of the dishwasher. The expansion unit 700, which has a relatively small volume, can be arranged on top of the evaporator 600, which has a relatively large volume.

[0221] Because of this structure, the evaporator 600 does not need to occupy separate space on the sub-plate 42. Therefore, the size of the sub-plate 42 can be reduced, and the volumetric efficiency of the sub-plate 42 can be increased.

[0222] The expansion device 700 can be configured such that relatively thin pipes made of metallic material are connected to two opposite sides of the body of the expansion device. Alternatively, the expansion device 700 can be positioned on top of the evaporator 600, spaced apart from the evaporator 600.

[0223] Therefore, due to this structure, when the expansion device 700 is subjected to external impact, the connecting pipe may be damaged or the expansion device 700 itself may be damaged. Therefore, a structure capable of stably supporting the expansion device 700 is needed.

[0224] In one embodiment, the support plate 43 may be arranged between the expansion device 700 and the evaporator 600, with the expansion device 700 located on the support plate 43.

[0225] The support plate 43 can be formed in the form of a plate and can be connected to the upper surface of the evaporator 600, which has a generally hexahedral shape, by means of a connecting mechanism such as screws.

[0226] The expansion device 700 can be located on the upper surface of the support plate 43 to contact the support plate 43. Therefore, the expansion device 700 can be stably supported by the support plate 43.

[0227] Therefore, even when an external impact is applied to the expansion device 700, damage to the expansion device 700 or the pipes connected to the expansion device 700 can be effectively suppressed.

[0228] Figure 12 This is a diagram illustrating a washing pump 150 according to an embodiment. Figure 13 This is a diagram illustrating the connection between the washing pump 150 and the condenser 300.

[0229] The heat pump system can operate when heated wash water is supplied to tub 12. Room temperature wash water that is not heated during dishwasher operation can be supplied to tub 12 under the operation of wash pump 150.

[0230] Therefore, the heat pump system can only operate when the wash water is heated, and the wash water can be supplied to the condenser 300. When room temperature wash water is supplied to the tank 12, it is reasonable not to supply wash water to the condenser 300 and not to operate the heat pump system.

[0231] Therefore, the washing pump 150 needs a structure that allows it to be selectively opened and closed, and to selectively supply washing water to the condenser 300.

[0232] The washing pump 150 may include a discharge section 152 connected to one of the first washing water inlet / outlet section 326 and the second washing water inlet / outlet section 327. The discharge section 152 may supply washing water to the condenser 300.

[0233] The discharge section 152 can be separately installed in the washing pump 150 from the water outlet section 151, which is connected to the spray arms 13, 14, and 15 installed in the tank 12. The discharge section 152 can be connected to the washing water inlet / outlet section of the condenser 300 via the discharge pipe 153.

[0234] Therefore, when room temperature washing water is supplied to the tub 12, the discharge section 152 can be closed, and the washing water can be discharged through the outlet section 151 to supply the spray arms 13, 14 and 15 and the tub 12.

[0235] When heated wash water is supplied to the tank 12, the drain section 152 can be opened and the outlet section 151 can be closed. The wash water can be introduced into the condenser 300 through the drain section 152 and the drain pipe 153, and is heated in the condenser 300.

[0236] The wash water inlet / outlet of the condenser 300 can be connected to the spray arms 13, 14 and 15. The wash water heated in the condenser 300 can be discharged from the condenser 300 again and then supplied to the spray arms 13, 14 and 15 and the tank 12.

[0237] In the following text, reference will be made to Figure 6 and Figure 7 Describe a structure that can inhibit the accumulation of foreign matter in the condenser 300.

[0238] The dishwasher may include a filter 110 installed at the water collector 100. The filter 110 can filter the wash water to be collected toward the water collector 100.

[0239] The wash water can flow within the internal space of the housing 310 of the condenser 300. Foreign matter contained in the wash water can flow through the wash water flow space.

[0240] In the washing water flow space, foreign objects can adhere to and accumulate on the surface of the housing 310 or the pipe 320. Therefore, it is necessary to prevent the accumulation of foreign objects on it.

[0241] Therefore, in the embodiment, the first distance D1, defined as the shortest straight-line distance between the inner surface of the housing 310 and the outer surface of the outermost cylindrical structure of the tube 320, can be equal to or greater than the diameter of each through hole in the through hole 111 formed in the filter 110 through which the washing water flows.

[0242] When the maximum diameter of the foreign object is greater than the diameter of each through hole in the through hole 111, the foreign object contained in the washing water can be filtered by the filter 110 as the washing water flows through the through hole 111. Therefore, the foreign object contained in the washing water introduced into the condenser 300 through the through hole 111 can have a maximum diameter smaller than the diameter of each through hole in the through hole 111.

[0243] The first distance D1, defined as the shortest straight-line distance between the inner surface of the housing 310 and the outer surface of the outermost cylindrical structure of the tube 320, can be equal to or greater than the maximum diameter of the foreign object introduced into the condenser 300. Therefore, the foreign object can flow smoothly through the wash water flow space, which is larger than the size of the foreign object, and can avoid adhering to the surfaces of the housing 310 or the tube 320. Thus, the accumulation of foreign objects in the wash water flow space of the condenser 300 can be effectively prevented.

[0244] Reference Figure 1 In addition to the structure in which through-holes 111 are formed in the connecting portion, filter 110 may also include a cup-shaped mesh structure. Therefore, foreign matter passing through through-holes 111 is again captured in the cup-shaped mesh structure, and finally, the maximum diameter of the foreign matter that has passed through filter 110 and flows into condenser 300 can be much smaller than the diameter of the individual through-holes in through-holes 111.

[0245] Therefore, when the first distance D1 is equal to or greater than the diameter of each through hole in the through hole 111, the size of the foreign matter introduced into the condenser 300 will be much smaller than the first distance D1. Therefore, setting the size of the first distance D1 to be equal to or greater than the diameter of each through hole in the through hole 111 can have a significant effect on suppressing the accumulation of foreign matter in the condenser 300.

[0246] In an embodiment, the second distance D2, defined by the shortest straight-line distance between the outer surfaces of adjacent cylindrical structures among a plurality of cylindrical structures spaced apart from each other in the diametrical direction of the housing 310, can be equal to or greater than the diameter of each through hole in the through hole 111.

[0247] Since the tube 320 is wound to form multiple cylindrical structures as described above, foreign objects can also be trapped between the outer surfaces of the cylindrical structures. Therefore, the second distance D2, which is the shortest distance between the outer surfaces of the cylindrical structures spaced apart from each other in the diametrical direction of the shell, can be equal to or greater than the diameter of each through hole in the through hole 111, because the first distance D1 is equal to or greater than the diameter of each through hole in the through hole 111.

[0248] Therefore, foreign matter can flow smoothly in the space between adjacent coils 321, which is larger than the size of the foreign matter, and the foreign matter can avoid adhering to the outer surface of the coils 321. In this way, it is possible to effectively prevent foreign matter from accumulating in the wash water flow space of the condenser 300.

[0249] In an embodiment, the third distance D3, defined by the shortest straight-line distance between the outer surfaces of the coils 321 that are adjacent to each other in the longitudinal direction of the housing, can be equal to or greater than the diameter of each through hole in the through hole 111.

[0250] In this case, the coils 321 being adjacent to each other means that one coil 321 is wound in a spiral shape, such that a portion of the coil 321 and another portion thereof are arranged adjacent to each other in the longitudinal direction of the condenser 300.

[0251] In the condenser 300, foreign matter may also be trapped between adjacent coils 321. Therefore, when the first distance D1 or the second distance D2 is equal to or greater than the diameter of each through hole in the through hole 111, the third distance D3 between adjacent coils 321 in the longitudinal direction of the housing can be equal to or greater than the diameter of each through hole in the through hole 111.

[0252] Therefore, foreign matter can flow smoothly in the space between adjacent coils 321, where the space is larger than the size of the foreign matter, and can avoid adhering to the outer surface of the coils 321. In this way, it is possible to effectively prevent foreign matter from accumulating in the wash water flow space of the condenser 300.

[0253] In this embodiment, the condenser 300 can be manufactured with the first distance D1, the second distance D2, and the third distance D3 having the design values ​​described above. However, during the installation of the condenser 300 into the dishwasher or during the use of the dishwasher, deformation occurs in the condenser 300, so each of the first distance D1, the second distance D2, or the third distance D3 may be less than its design value.

[0254] Considering this size variation, the first distance D1, the second distance D2, or the third distance D3 can be sufficiently larger than the diameter of each through hole in the through hole 111 to effectively suppress the accumulation of foreign matter in the washing water flow space of the condenser 300.

[0255] Therefore, in the implementation, the size of at least one of the first distance D1 or the second distance D2 can be in the range of 1.5 to 2.5 times the diameter of each through hole in the through hole 111.

[0256] The through-hole 111 of filter 110 can be circular, quadrilateral, or rhomboid in shape. Assuming the through-hole 111 of filter 110 is square, the diagonal dimension will be 1.4 times the length of one side (the square root of 2). Therefore, considering tolerances, 1.5 times is the minimum value within the range of ratios between at least one of the first distance D1 or the second distance D2 and the diameters of the individual through-holes in through-hole 111. Even when the through-hole 111 has a circular shape, considering the fact that foreign matter that has passed through the through-hole 111 expands and increases in volume due to the washing water, a suitable minimum value within the range of ratios between at least one of the first distance D1 or the second distance D2 and the diameters of the individual through-holes in through-hole 111 is 1.5 times.

[0257] Due to this structure, the foreign object can flow smoothly and sufficiently within the wash water flow space of the condenser 300, relative to its size. Furthermore, the first distance D1, the second distance D2, or the third distance D3 is large enough that even if the first distance D1, the second distance D2, or the third distance D3 is slightly smaller than its design value during the installation or operation of the condenser 300, the size is still sufficiently ensured to allow the foreign object to pass smoothly.

[0258] Therefore, it can effectively prevent the accumulation of foreign objects in the washing water flow space of the condenser 300.

[0259] The present disclosure has been described above with reference to the accompanying drawings illustrated herein. However, the present disclosure is not limited to the embodiments and drawings disclosed herein, and it will be apparent to those skilled in the art that various modifications can be made to it within the scope of the technical concept of the present disclosure. Furthermore, even if the effects of the configuration according to the present disclosure are not explicitly described and explained in the description of the embodiments of the present disclosure, it should be apparent that the predictable effects arising therefrom should be appreciated.

Claims

1. A dishwasher, the dishwasher comprising: A bucket, the bucket being configured to hold tableware therein; as well as A condenser is disposed below the tank, wherein wash water and refrigerant flow separately within the condenser. The condenser includes: A housing that defines the external shape of the condenser and is configured such that the wash water and the refrigerant flow separately therein; and A tube is housed inside the housing, in which the refrigerant flows and along the tube. The tube is wound to form multiple cylindrical structures, which are arranged sequentially at intervals along the diameter of the shell. Each of the plurality of cylindrical structures includes each of the plurality of tube portions of the tube. Each of the plurality of tube portions extends in the longitudinal direction of the housing and is wound around the center of the housing in a spiral coil manner to form each of the plurality of cylindrical structures.

2. The dishwasher according to claim 1, wherein, The tube portions of the tube are wound in a spiral coil manner to form a plurality of coils, which are spaced apart from each other in the longitudinal direction of the housing.

3. The dishwasher according to claim 2, wherein, As the plurality of cylindrical structures are arranged outward along the diametrical direction of the shell, the corresponding diameters of the plurality of cylindrical structures increase sequentially.

4. The dishwasher according to claim 3, wherein, As the plurality of cylindrical structures are arranged inward along the diametrical direction of the shell, the corresponding diameters of the plurality of cylindrical structures decrease sequentially.

5. The dishwasher according to claim 1, wherein, The condenser includes a cap that can be detachably connected to an open side of the housing. The cap contains a refrigerant inlet and a refrigerant outlet for the tube to pass through.

6. The dishwasher according to claim 5, wherein, The shell is formed in a cylindrical shape with a hollow space. The cap includes: A closed end portion, said closed end portion being coupled to the housing to close said one opening side of the housing; and An extended connecting portion is formed in the shape of a hollow cylinder extending circumferentially from the closed end portion, wherein the extended connecting portion is connected to the outer circumferential surface of the housing.

7. The dishwasher according to claim 5, wherein, The condenser includes: A first washing water inlet / outlet portion is formed to extend through the cap, wherein the washing water is introduced into or discharged from the housing through the first washing water inlet / outlet portion; and The second washing water inlet / outlet portion is formed to extend through the housing, wherein the washing water is introduced into or discharged from the housing through the second washing water inlet / outlet portion.

8. The dishwasher according to claim 7, wherein, The first wash water inflow / outflow portion is formed to protrude linearly outward from the outer circumferential surface of the cap in a direction intersecting with the circumferential direction of the cap. The second washing water inlet / outlet portion is located at the end opposite to the end of the housing connected to the cap. The second washing water inflow / outflow portion is formed to protrude outward from the outer circumferential surface of the housing in a direction intersecting with the circumferential direction of the housing.

9. The dishwasher according to claim 1, wherein, The dishwasher also includes: A base, which is arranged below the barrel; The mounting portion is disposed in the base; and A sub-plate is mounted on the mounting portion and configured to be removable from the mounting portion, wherein the condenser is mounted on the sub-plate.

10. The dishwasher according to claim 9, wherein, The dishwasher also includes: A water collector, wherein the water collector is disposed below the bucket and configured to store the wash water in the water collector; and A washing pump, which is in fluid communication with the water collector and configured to deliver the washing water. The water collector and the washing pump are mounted on the mounting portion. The water collector and the washing pump are arranged in the central area of ​​the installation section. The auxiliary plate is arranged on the mounting portion at a position that avoids the water collector and the washing pump. At least a portion of the sub-plate is arranged on the front region of the mounting portion.

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