Dishwasher

Abstract

A dishwasher is provided. The dishwasher includes a tub in which dishes are received. The dishwasher includes a sump disposed below the tub. Wash water is stored in the sump. The dishwasher includes a filter mounted at the sump. The filter filters the wash water to be collected in the sump. The dishwasher includes a condenser disposed below the tub. Wash water and refrigerant flow through the condenser. The condenser includes a housing defining an outer shape. The wash water and the refrigerant flow separately in the housing. The condenser includes a first tube received within the housing. The refrigerant flows through the first tube.

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 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] 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.

[0012] 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.

[0013] In addition, there is a need to develop a dishwasher with a structure that can improve the heat exchange performance between the refrigerant and the washing water in the condenser. Summary of the Invention

[0014] The technical objective of this disclosure is to provide a dishwasher with a structure capable of inhibiting the accumulation of foreign matter in the condenser.

[0015] Another technical objective of this disclosure is to provide a dishwasher with a condenser having a structure that improves the heat exchange performance between the refrigerant and the wash water.

[0016] The purpose of this disclosure is not limited to the purposes mentioned above. Other unmentioned purposes and advantages of this disclosure may be understood based on the following description and may 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.

[0017] According to an embodiment, a dishwasher may include a bucket in which tableware is contained.

[0018] Dishwashers may include a water collector located below the tub. Wash water can be stored in the water collector.

[0019] Dishwashers may include a filter installed in the water collector. The filter can filter the wash water that will be collected in the water collector.

[0020] The dishwasher may include a condenser disposed below the tub. Wash water and refrigerant may flow through the condenser.

[0021] A condenser may include a housing that defines the external shape of the condenser. The housing may be configured such that wash water and refrigerant flow separately therein.

[0022] The condenser may include a first tube housed within a casing. Refrigerant may flow through the first tube.

[0023] The magnitude of the first distance, defined as the distance between the inner surface of the housing and the outer surface of the first tube, can be set to be greater than the diameter of each through hole formed in the filter through which the washing water flows.

[0024] The first tube can be formed in the form of a spiral coil and arranged inside the shell.

[0025] In this respect, the magnitude of the first distance, defined as the shortest straight-line distance between the inner surface of the housing and the outer surface of the first tube, can be set to be greater than the diameter of each through hole in the through hole.

[0026] In a shell-and-coil condenser, the second distance, defined as the shortest straight-line distance between the outer surfaces of adjacent portions of the coil, can be greater than the diameter of each through-hole in the through-hole.

[0027] In the dishwasher according to this disclosure, at least one of the first distance or the second distance can be in the range of 1.5 to 2.5 times the diameter of each through hole in the through hole.

[0028] The cross-sectional area of ​​the condenser's wash water flow can be equal to or greater than the cross-sectional area of ​​the wash water flow in the wash water pipe connected to the wash pump used to deliver wash water to the condenser.

[0029] Another embodiment of the condenser may include a housing defining its external appearance. The housing may be configured such that wash water and refrigerant flow separately therein.

[0030] The condenser may include a second tube housed within the casing. Wash water may flow through the second tube.

[0031] The second tube may include a plurality of second tubes, wherein the plurality of second tubes are received within the housing and arranged to be spaced apart from each other in the diametrical direction of the housing. Each of the plurality of second tubes is oriented such that its longitudinal direction is parallel to the longitudinal direction of the housing.

[0032] The total water flow cross-sectional area of ​​the multiple second pipes can be equal to or greater than the water flow cross-sectional area of ​​the washing water pipe connected to the washing pump used to deliver washing water to the second pipes.

[0033] As the second tubes are arranged sequentially along the diametrical direction from the edge toward the center of the internal space of the shell, the corresponding inner circumferential diameters of the second tubes can be decreased sequentially.

[0034] As each of the second tubes extends along the flow direction of the washing water, the outer circumferential diameter of each of the second tubes can be reduced.

[0035] Specifically, the condenser has a washing water inlet area and a washing water outlet area. Washing water is introduced into the washing water inlet area and discharged from the washing water outlet area. As each of the second tubes extends from the washing water inlet area to the washing water outlet area, the outer circumferential diameter of each of the second tubes can be reduced.

[0036] The condenser may include: a refrigerant inlet portion protruding outward from the housing, wherein refrigerant is introduced into the housing through the refrigerant inlet portion; and a refrigerant outlet portion protruding outward from the housing, wherein refrigerant from inside the housing is discharged through the refrigerant outlet portion.

[0037] The refrigerant inlet and refrigerant outlet can be arranged to be spaced apart from each other in the longitudinal direction of the casing.

[0038] The condenser may include a refrigerant flow path guide that defines the refrigerant flow path. The refrigerant flow path guide may be formed within the housing.

[0039] Refrigerant flow path guides can block the flow of refrigerant to change its flow direction, thereby increasing the flow length of the refrigerant within the casing.

[0040] The condenser may also include a mounting socket having a side that connects to the housing. The diameter of the side connected to the housing may be larger than the diameter of the opposite side of the mounting socket.

[0041] The mounting socket may include a first battery having one side connected to the housing; and a second battery disposed on the other side of the first battery and spaced apart from the first battery.

[0042] The mounting socket may also include a third battery disposed between the first and second batteries. As the third battery extends toward the second battery, the diameter of the third battery gradually decreases.

[0043] The refrigerant flow path guide can be arranged at a position spaced apart from each of the refrigerant inlet and refrigerant outlet portions along the longitudinal direction of the housing.

[0044] The refrigerant flow path guide can protrude outward from the inner wall surface of the housing. The refrigerant flow path guide can also protrude in a direction intersecting the longitudinal direction of the housing.

[0045] In the dishwasher according to this disclosure, when the maximum diameter of a foreign object contained in the washing water is greater than the diameter of each of the through holes, the foreign object can be filtered by the filter as the washing water flows through the through holes. Therefore, the foreign object contained in the washing water introduced into the condenser through the through holes can have a maximum diameter smaller than the diameter of each of the through holes.

[0046] The first distance, which serves as the width of the wash water flow space in the condenser, can be greater than the maximum diameter of any foreign object introduced into the condenser. Therefore, the foreign object can flow smoothly through the wash water flow space, which is larger than the object itself, without adhering to the surface of the casing or the first tube. This effectively prevents the accumulation of foreign objects in the wash water flow space of the condenser.

[0047] Furthermore, in the dishwasher according to this disclosure, in the coil-tube condenser, each of the first distance and the second distance can be formed to be larger than the diameter of the respective through holes. This can effectively suppress the accumulation of foreign matter introduced into the condenser on the surface of the coil or the inner surface of the housing. Therefore, it is possible to effectively prevent the accumulation of foreign matter in the washing water flow space of the condenser.

[0048] Furthermore, in the dishwasher according to this disclosure, at least one of the first distance or the second distance can be in the range of 1.5 to 2.5 times the diameter of each through hole in the through hole.

[0049] Because of this structure, foreign objects can flow smoothly in the condenser's wash water flow space, which is a space large enough for the size of the foreign object. Furthermore, the first or second distance is large enough that even if the first or second distance is slightly smaller than its design value due to the installation or operation of the condenser, sufficient space is still ensured for the smooth passage of foreign objects.

[0050] This effectively prevents foreign objects from accumulating in the wash water flow space of the condenser.

[0051] Furthermore, in the dishwasher according to this disclosure, as the second tubes are arranged sequentially along the diametrical direction of the internal space of the housing in the direction from the edge toward the center, the corresponding inner circumferential diameters of the second tubes decrease sequentially.

[0052] In this way, the flow velocity of the washing water in all the multiple second pipes can be uniform in the diametrical direction of the housing. Furthermore, the diameter of the second pipe at the center in the diametrical direction of the internal space of the housing decreases, such that the cross-sectional area of ​​the washing water flow in the second unit of the mounting socket and the total cross-sectional area of ​​the washing water flow in the second pipe of the condenser can be similar to each other.

[0053] Due to this structure, the heat exchange performance between the refrigerant and the washing water in the condenser can be improved.

[0054] Furthermore, in the dishwasher according to this disclosure, the outer circumferential diameter of the second tube can be set to decrease as the second tube extends along the flow direction of the washing water.

[0055] Therefore, the outer circumferential diameter of the second tube is increased in the wash water inlet region of the condenser. Consequently, the heat exchange area of ​​the second tube can be increased accordingly. Therefore, the amount of heat exchange in the wash water inlet region of the condenser can be increased. Thus, the heat exchange performance in the condenser can be effectively improved.

[0056] 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 achieve this disclosure. Attached Figure Description

[0057] Figure 1 This is a cross-sectional view of a dishwasher according to an embodiment.

[0058] Figure 2 This is a schematic diagram illustrating components arranged in the base of a dishwasher according to an embodiment.

[0059] Figure 3 This is a plan view illustrating the lid of a bucket.

[0060] Figure 4 This is a perspective view illustrating a portion of a condenser according to an embodiment.

[0061] Figure 5 yes Figure 4 Cross-sectional view.

[0062] Figure 6 This is a perspective view illustrating a portion of a condenser according to another embodiment.

[0063] Figure 7 yes Figure 6 Cross-sectional view.

[0064] Figure 8 This is an example Figure 6 The diagram illustrates a portion of the coil in a condenser.

[0065] Figure 9 This is a perspective view illustrating a portion of a condenser according to yet another embodiment.

[0066] Figure 10 This is a cross-sectional view illustrating a condenser according to yet another embodiment. Detailed Implementation

[0067] 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.

[0068] 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".

[0069] Throughout this document, unless otherwise stated, each part may be singular or plural.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] The tub 12 can be formed in the shape of a hexahedron 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] In this implementation, a heat pump system can be used to heat the wash water. This heat pump system will be described first below.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] The condenser 300 can be arranged below the tank 12. Wash water and refrigerant can flow in the condenser 300.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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.

[0105] Figure 2This 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.

[0106] 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.

[0107] 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.

[0108] The mounting portion 40 can typically be formed as a plate. Various components can be attached to the upper surface of the mounting portion 40.

[0109] 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 2 As indicated by the arrow, it moves in a sliding manner, thus allowing it to be removed from the base 30.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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.

[0120] In addition, the evaporator 600 can be installed on the mounting section 40.

[0121] 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.

[0122] 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.

[0123] exist Figure 2The image shows a shell-and-tube condenser 300. However, the condenser 300 can be provided in various shapes and structures different from those of a shell-and-tube condenser. The condenser 300 can be provided in tube-in-tube, shell-and-coil, shell-and-tube, and other types.

[0124] The structure and features of various types of condensers 300 will be described below.

[0125] Figure 3 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 detachably attached to the bucket 12.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] Therefore, it is necessary to suppress the phenomenon that such foreign matter does not exit from the condenser 300 but accumulates in the condenser 300.

[0132] Figure 4 This is a perspective view illustrating a portion of a condenser 300 according to an embodiment. Figure 5 yes Figure 4 A cross-sectional view. In Figure 4 The example shown is a tube-in-tube condenser 300.

[0133] The condenser 300 may include a housing 310 defining the external shape of the condenser. The housing 310 may be configured such that wash water and refrigerant flow separately within the housing 310. A first pipe 320a may be housed within the housing 310.

[0134] The housing 310 can typically be formed as a cylinder with an internal space formed therein. The housing 310 can be made of, for example, a solid material with excellent corrosion resistance, such as copper, aluminum, stainless steel, etc.

[0135] The condenser 300 may include a first tube 320a received within a housing 310. Refrigerant may flow through the first tube 320a. The first tube 320a may be made of, for example, a pipe having a cylindrical cross-section and a hollow space.

[0136] To increase the heat exchange area between the refrigerant and the washing water, the length of each of the housing 310 and the first tube 320a can be increased. In this case, to reduce the volume of the condenser 300, the entire condenser 300 can be bent at appropriate locations to have an overall Z-shaped shape.

[0137] In the condenser 300, wash water can flow in and along the space between the inner surface of the housing 310 and the outer surface of the first tube 320a. Foreign matter contained in the wash water can flow through the wash water flow space.

[0138] In the washing water flow space, foreign objects can adhere to and deposit on the inner surface of the housing 310 or the outer surface of the first tube 320a. Therefore, it is necessary to prevent the accumulation of foreign objects on them.

[0139] Therefore, in the embodiment, the first distance D1, which is defined as the shortest straight distance between the inner surface of the housing 310 and the outer surface of the first tube 320a, can be greater than the diameter of each through hole in the through hole 111 formed in the filter 110 through which the washing water flows.

[0140] 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 while 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.

[0141] The first distance D1, which serves as the width of the wash water flow space in the condenser 300, can be greater than the maximum diameter of any 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 surface of the housing 310 or the first tube 320a. Thus, the accumulation of foreign objects in the wash water flow space of the condenser 300 can be effectively prevented.

[0142] 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 each through-hole in through-hole 111.

[0143] Therefore, when the first distance D1 is greater than the diameter of 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 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.

[0144] Figure 6 This is a perspective view illustrating a portion of a condenser 300 according to another embodiment. Figure 7 yes Figure 6 Cross-sectional view. Figure 8 This is an example Figure 6 A diagram showing a portion of the coil 321 in the condenser 300. Figure 6 The example shown is a shell-and-coil condenser 300.

[0145] The first tube 320a can be formed in the form of a spiral coil 321 and can be arranged inside the housing 310. Refrigerant can flow in and along the first tube 320a. A washing water flow space can be formed between the outer surface of the first tube 320a and the inner surface of the housing 310 through which washing water flows.

[0146] Because the first tube 320a is formed in the form of a spiral coil 321, the overall volume of the condenser 300 can be reduced. At the same time, compared with the total volume of the condenser 300, the heat exchange area of ​​the first tube 320a can be significantly increased.

[0147] Even in the shell-and-coil type condenser 300, the first distance D1, defined as the shortest straight-line distance between the inner surface of the shell 310 and the outer surface of the first tube 320a, can be greater than the diameter of each through hole in the through hole 111. Its detailed description is the same as described above.

[0148] In the shell-and-coil type condenser 300, the second distance D2, defined as the shortest straight-line distance between the outer surfaces of adjacent portions of the coil 321, can be greater than the diameter of each through hole in the through hole 111. In this case, adjacent portions of the coil 321 mean that a single coil 321 is wound in a helical manner, such that a portion of the coil 321 and another portion of the coil 321 are arranged adjacent to each other.

[0149] In the shell-and-coil type condenser 300, foreign objects can also be trapped between adjacent portions of the coil 321. Therefore, when the first distance D1 is greater than the diameter of each through hole in the through hole 111, the second distance D2 between adjacent portions of the coil 321 can be greater than the diameter of each through hole in the through hole 111.

[0150] Therefore, foreign matter can flow smoothly along the space between adjacent portions of the coil 321, which is formed with a space larger than the size of the foreign matter, and can avoid adhering to the surface of the coil 321. Thus, it is possible to effectively prevent the accumulation of foreign matter in the wash water flow space of the condenser 300.

[0151] In the shell-and-coil type condenser 300, each of the first distance D1 and the second distance D2 can be greater than the diameter of each through hole in the through hole 111. Therefore, it is possible to effectively prevent foreign matter introduced into the condenser 300 from accumulating on the outer surface of the coil 321 or the inner surface of the shell 310. Therefore, it is possible to effectively prevent foreign matter from accumulating in the wash water flow space of the condenser 300.

[0152] In one embodiment, the condenser 300 can be manufactured with the first distance D1 and the second distance D2 having the design values ​​described above. However, during the installation of the condenser 300 into the dishwasher or during use of the dishwasher, deformation occurs in the condenser 300, so each of the first distance D1 or the second distance D2 may be less than its design value.

[0153] Taking into account this size variation, the first distance D1 or the second distance D2 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.

[0154] 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.

[0155] 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 dimension of its diagonal 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 in the range of ratios between at least one of the first distance D1 and the second distance D2 and the diameter of each through-hole in through-hole 111. Even when through-hole 111 has a circular shape, considering the fact that foreign matter that has passed through through-hole 111 expands and increases in volume due to washing water, a suitable minimum value in the range of ratios between at least one of the first distance D1 and the second distance D2 and the diameter of each through-hole in through-hole 111 is 1.5 times.

[0156] Due to this structure, foreign objects can flow smoothly in the wash water flow space of the condenser 300, which is large enough compared to the size of the foreign object. In addition, the first distance D1 or the second distance D2 is large enough that even if the first distance D1 or the second distance D2 is slightly smaller than its design value during the installation or operation of the condenser 300, the size can still be adequately ensured to allow foreign objects to pass smoothly.

[0157] Therefore, it can effectively prevent the accumulation of foreign objects in the washing water flow space of the condenser 300.

[0158] The cross-sectional area of ​​the washing water flow in the condenser 300 can be equal to or greater than the cross-sectional area of ​​the washing water flow in the washing water pipe that connects the washing pump 150 and the condenser 300 to each other.

[0159] exist Figure 4 and Figure 5 In the condenser 300 shown, the cross-sectional area of ​​the washing water flow of the condenser 300 can be, for example, a value obtained by subtracting the size of the cross-sectional area defined by the outer circumference of the first tube 320a from the size of the cross-sectional area defined by the inner circumference of the housing 310.

[0160] The fact that the cross-sectional area of ​​the washing water flow in the condenser 300 is equal to or greater than the cross-sectional area of ​​the washing water flow in the washing water pipe can prevent the pressure of the washing water introduced into the condenser 300 from increasing inside the condenser 300.

[0161] This prevents the flow rate of the wash water from increasing within the condenser 300 due to increased pressure. Additionally, it increases the duration of heat exchange between the refrigerant and the wash water. Therefore, the heat exchange performance within the condenser 300 can be effectively improved.

[0162] Figure 9 This is a perspective view showing a portion of a condenser 300 according to yet another embodiment. Figure 10 This is a cross-sectional view illustrating a condenser 300 according to yet another embodiment. Figure 9 The example shown is a shell-and-tube condenser 300.

[0163] Figure 9 and Figure 10 The arrows in the diagram indicate the direction of water flow during washing. The following explains... Figure 9 and Figure 10 The common structure of the condenser 300 shown.

[0164] The condenser 300 may include a housing 310 defining its external shape. The housing 310 may be configured to allow wash water and refrigerant to flow separately therein. A second pipe 320b may be housed within the housing 310.

[0165] The housing 310 can typically be formed as a cylinder with an internal space formed therein. The housing 310 can be made of, for example, a solid material with excellent corrosion resistance (e.g., copper, aluminum, stainless steel, etc.) to withstand high-pressure refrigerants.

[0166] A space for refrigerant to flow can be formed inside the housing 310. When the high-temperature refrigerant flows through this space, heat can be released from the refrigerant to the outside of the housing 310. Since this heat release reduces the performance of the condenser 300, an insulating material can be coated on the outer surface of the housing 310 to surround the housing 310, thereby suppressing heat dissipation to the outside.

[0167] The condenser 300 may include a second pipe 320b received within the housing 310. Wash water may flow into and along the second pipe 320b, which extends along the length of the housing.

[0168] The second tube 320b may include a plurality of second tubes 320b, which are received within the housing 310 and arranged to be spaced apart from each other in their diametrical direction. The second tube 320b may be implemented as, for example, a pipe having a cylindrical cross-section and a hollow space.

[0169] The second tubes 320b can be arranged to be spaced apart from each other. Specifically, the second tubes 320b can be arranged to be spaced apart from each other in the diametrical direction of the housing 310.

[0170] Because multiple second tubes 320b are incorporated, the contact area between the refrigerant and the washing water, i.e., the heat exchange area, can be increased. Furthermore, this structure ensures uniform heat exchange between the flowing refrigerant and the entire washing water system, thereby improving heat exchange efficiency.

[0171] The condenser 300 can be oriented such that its longitudinal direction is generally parallel to the transverse direction of the dishwasher. The internal space of the base 30 where the condenser 300 is located can have a relatively small dimension in the vertical direction of the dishwasher, while having a relatively large dimension in the transverse direction. This structure can save on the overall volume of the dishwasher.

[0172] Considering the structure of the internal space of the base 30, the condenser 300 can be oriented such that its longitudinal direction is parallel to the transverse direction of the dishwasher. Therefore, the condenser 300 can be effectively disposed within the relatively narrow internal space of the base 30.

[0173] The condenser 300 may include a refrigerant inlet portion 331 through which refrigerant is introduced into the housing 310. The refrigerant inlet portion 331 may protrude outward from the housing 310. The condenser 300 may include a refrigerant outlet portion 332 through which refrigerant is discharged from the interior of the housing 310 to the exterior. The refrigerant outlet portion 332 may protrude outward from the housing 310.

[0174] For example, such as Figure 9 and Figure 10 As shown, each of the refrigerant inlet portion 331 and the refrigerant outlet portion 332 can be formed as a pipe of predetermined length protruding in a direction intersecting the longitudinal direction of the housing 310.

[0175] Each of one end of the refrigerant inlet portion 331 and one end of the refrigerant outlet portion 332 can be connected to a refrigerant pipe through which the refrigerant flows.

[0176] The refrigerant inlet section 331 and the refrigerant outlet section 332 can be positioned relative to the flow direction of each of the washing water and the refrigerant.

[0177] For example, when the condenser 300 is implemented as a condenser 300 in which the flow directions of the washing water and the refrigerant are opposite to each other, the refrigerant inlet portion 331 can be arranged at a position adjacent to the washing water outlet of the condenser 300, and the refrigerant outlet portion 332 can be arranged at a position adjacent to the washing water inlet of the condenser 300.

[0178] In another example, when the condenser 300 is implemented such that the flow directions of the washing water and the refrigerant are the same, the refrigerant inlet portion 331 can be arranged adjacent to the washing water inlet of the condenser 300, and the refrigerant outlet portion 332 can be arranged adjacent to the washing water outlet of the condenser 300.

[0179] The refrigerant inlet 331 and refrigerant outlet 332 can be arranged to be spaced apart from each other in the longitudinal direction of the housing 310. The refrigerant introduced into the housing 310 does not flow but stagnates at the corners of the housing 310. Therefore, it is necessary to select the positions of the refrigerant inlet 331 and refrigerant outlet 332 to reduce the refrigerant stagnation area.

[0180] The condenser 300 can be oriented such that its longitudinal direction is parallel to the transverse direction of the dishwasher. Accordingly, the refrigerant inlet portion 331 and the refrigerant outlet portion 332 can be arranged to be spaced apart from each other in the transverse direction of the dishwasher.

[0181] The refrigerant introduced into the housing 310 can be stagnant and will not flow at the corners of the housing 310. Therefore, it is necessary to select the positions of the refrigerant inlet portion 331 and the refrigerant outlet portion 332 so as to reduce the refrigerant stagnation area.

[0182] The refrigerant inlet portion 331 and the refrigerant outlet portion 332 can be positioned adjacent to two opposite ends in the longitudinal direction of the condenser 300, respectively. This structure can reduce the refrigerant stagnation area in the corners of the housing 310 where the refrigerant does not flow.

[0183] However, the refrigerant inlet portion 331 and the refrigerant outlet portion 332 can be located at positions that avoid the location of the refrigerant flow path guide 340, in order to facilitate smooth refrigerant flow.

[0184] The condenser 300 may include a refrigerant flow path guide 340 that defines a refrigerant flow path. The refrigerant flow path guide 340 may be formed inside the housing 310.

[0185] The refrigerant flow path guide 340 can block the flow of refrigerant to change its flow path. Therefore, the flow length of the refrigerant in the condenser can be increased.

[0186] A refrigerant flow path guide 340 can be arranged in the refrigerant flow path to obstruct the refrigerant flow. The refrigerant can collide with the refrigerant flow path guide 340, and thus its flow path can be altered. Because the refrigerant flows to bypass the refrigerant flow path guide 340, the flow length of the refrigerant to the housing 310 can be increased.

[0187] In this embodiment, the refrigerant flow path guide 340 can be received within the housing 310. The refrigerant flow path guide 340 can block the flow of refrigerant to alter its flow path. Therefore, the flow length of the refrigerant within the housing 310 can be increased. As a result, the heat exchange efficiency between the refrigerant and the washing water in the condenser 300 can be improved. Therefore, the performance of both the heat pump system and the dishwasher having the heat pump system can be improved.

[0188] The refrigerant flow path guide 340 can be arranged at a position spaced apart from each of the refrigerant inlet portion 331 and the refrigerant outlet portion 332 along the longitudinal direction of the housing 310. For example, as Figure 10 As illustrated, when multiple refrigerant flow path guides 340 are provided, the refrigerant flow path guides 340 can be provided in the longitudinal direction of the housing 310 between the refrigerant inlet portion 331 and the refrigerant outlet portion 332.

[0189] If the refrigerant flow path guide 340 is arranged at a position overlapping with the refrigerant inlet portion 331 or the refrigerant outlet portion 332, the refrigerant flow path guide 340 can prevent refrigerant from flowing into the housing 310. Alternatively, the refrigerant flow path guide 340 can prevent refrigerant from discharging from the housing 310.

[0190] In this embodiment, the refrigerant flow path guide 340 can be arranged in the housing 310 at a position spaced apart from each of the refrigerant inlet portion 331 and the refrigerant outlet portion 332 in the longitudinal direction of the housing. Therefore, the refrigerant flow path guide 340 does not interfere with the inflow of refrigerant into the refrigerant inlet portion 331 and the outflow of refrigerant from the refrigerant outlet portion 332. Thus, the flow of refrigerant in the condenser 300 can proceed smoothly.

[0191] The refrigerant flow path guide 340 can protrude inward from the inner wall surface of the housing 310. The refrigerant flow path guide 340 can protrude in a direction intersecting the longitudinal direction of the housing 310.

[0192] The refrigerant introduced into the housing 310 can flow in the longitudinal direction of the housing 310. When the refrigerant flows in the housing 310, it can exchange heat with the washing water.

[0193] The refrigerant flow path guide 340 can protrude to intersect with the longitudinal direction of the housing 310 to block the refrigerant from flowing in the longitudinal direction of the housing 310. Therefore, the refrigerant can flow around the refrigerant flow path guide 340. Thus, the flow length of the refrigerant within the housing 310 can be increased.

[0194] The refrigerant flow path guide 340 can be connected to a plurality of second pipes 320b to support the second pipes 320b. In addition, the refrigerant flow path guide 340 can be used to maintain the spacing between adjacent second pipes among the plurality of second pipes 320b.

[0195] Reference Figure 10 Multiple refrigerant flow path guides 340 can be arranged spaced apart from each other in the longitudinal direction of the housing 310. When multiple refrigerant flow path guides 340 are provided, the flow length of the refrigerant into the housing 310 can be further increased. Although in Figure 10 Three refrigerant flow path guides 340 are shown, but four or more refrigerant flow path guides 340 may be arranged to be spaced apart from each other in the longitudinal direction of the housing 310.

[0196] The refrigerant flow path guide 340 can be arranged in a staggered or Z-shaped manner along the longitudinal direction of the housing 310 in the vertical or diametrical direction. Therefore, the refrigerant flow path guide 340 can be provided to block a portion of the refrigerant flow generated within the housing 310.

[0197] For example, in a cross-sectional view, some refrigerant flow path guides 340 can be arranged in the upper part of the interior space of the housing 310. In a cross-sectional view, other refrigerant flow path guides 340 can be arranged in the lower part of the interior space of the housing 310. Adjacent refrigerant flow path guides 340 can be arranged at different positions in the vertical direction of the housing 310. Therefore, multiple refrigerant flow path guides 340 can be arranged alternately with each other in a Z-shape or staggered manner in the vertical or diametrical direction of the housing 310 in the longitudinal direction of the housing 310.

[0198] For example, the refrigerant introduced into the housing 310 can flow in the longitudinal direction of the housing 310, and can be blocked in the cross-sectional view by the refrigerant flow path guide 340 arranged in the upper part of the internal space of the housing 310. The refrigerant can flow downward and then flow again in the longitudinal direction of the housing 310. In the cross-sectional view, the refrigerant can again be blocked by the refrigerant flow path guide 340 arranged in the lower part of the internal space of the housing 310. The refrigerant can flow upward and then flow again in the longitudinal direction of the housing 310.

[0199] Therefore, the refrigerant can flow horizontally within the housing 310, then downwards, then horizontally again, then upwards, and then horizontally again. This effectively increases the flow length of the refrigerant within the housing 310.

[0200] In this embodiment, a plurality of refrigerant flow path guides 340 may be provided. The plurality of refrigerant flow path guides 340 may be arranged to be spaced apart from each other in the longitudinal direction of the housing 310. The plurality of refrigerant flow path guides 340 may be arranged alternately in a Z-shape or staggered manner in the vertical or diametrical direction of the housing 310 in the longitudinal direction of the housing 310.

[0201] Due to this structure, the refrigerant in the housing 310 can be blocked by multiple refrigerant flow path guides 340, and its flow direction can be changed several times. Therefore, the flow length of the refrigerant in the housing 310 can be effectively increased. Consequently, the heat exchange performance between the refrigerant and the washing water in the condenser 300 can be improved.

[0202] The dishwasher may include a mounting socket 400, one side of which is connected to the housing 310. The mounting socket 400 may be configured such that the diameter of the side connected to the housing 310 is larger than the diameter of the opposite side. The mounting socket 400 may be detachably connected to the housing 310 or the wash water line.

[0203] The mounting socket 400 may include a pair of mounting sockets that are respectively connected to two opposite sides in the longitudinal direction of the condenser 300. The pair of mounting sockets 400 may have a shape that is symmetrical to each other around the condenser 300.

[0204] The mounting socket 400 allows the housing 310, which has a large diameter condenser 300, to be connected to a wash water pipe with a small diameter. Wash water can be introduced into the housing 310 from the wash water pipe.

[0205] Additionally, washing water can be discharged from housing 310 and introduced into the washing water pipe. A mounting socket 400 can connect housing 310 and washing water pipes of different diameters to each other.

[0206] The mounting socket 400 may include a first unit 410 connected to the condenser 300. The mounting socket 400 may include a second unit 420 disposed on the other side of the first unit 410. The first unit 410 may have a diameter larger than that of the second unit 420. The second unit 420 may have a diameter smaller than that of the first unit 410.

[0207] The mounting socket 400 may include a third unit 430 disposed between the first unit 410 and the second unit 420. The diameter of the third unit 430 may gradually decrease as the third unit extends toward the second unit 420. The diameter of the third unit 430 may gradually decrease as the third unit extends along the flow direction of the washing water.

[0208] As the washing water flows through the third unit 430, the cross-sectional area of ​​the water flow can gradually increase or decrease due to the structure of the third unit 430. Because of this structure, the flow of washing water discharged from the condenser 300 can be relatively stable compared to situations where the flow cross-sectional area increases or decreases rapidly. Therefore, the flow resistance of the washing water can be reduced.

[0209] Therefore, the washing water introduced into the second pipe 320 housed in the casing 310 of the condenser 300 can gradually increase its flow cross-sectional area as it flows through the assembly socket 400. Thus, the washing water can be smoothly introduced into the condenser 300.

[0210] Furthermore, the cross-sectional area of ​​the wash water discharged from the condenser 300 gradually decreases as it passes through the mounting socket 400. Therefore, the wash water can be discharged smoothly from the condenser 300. Additionally, the wash water can flow smoothly in subsequent wash water pipes.

[0211] The total flow cross-sectional area of ​​the multiple second pipes 320b can be equal to or greater than the flow cross-sectional area of ​​the washing water between the washing pump 150 used to transport washing water and the second pipes 320b. The total flow cross-sectional area of ​​the second pipes 320b refers to the flow cross-sectional area of ​​the washing water in the condenser 300.

[0212] As described above, the cross-sectional area of ​​the washing water flow in the condenser 300 being equal to or greater than the cross-sectional area of ​​the washing water pipe can prevent the pressure of the introduced washing water from increasing within the condenser 300.

[0213] This prevents the flow rate of the wash water from increasing within the condenser 300 due to increased pressure. Additionally, it increases the duration of heat exchange between the refrigerant and the wash water. Therefore, the heat exchange performance within the condenser 300 can be effectively improved.

[0214] The second tube 320b can be oriented such that its longitudinal direction is parallel to the longitudinal direction of the housing 310. Therefore, the washing water introduced into the second tube 320b can be heated while flowing longitudinally along the housing 310.

[0215] As the washing water flows along the direction from the second unit 420, which serves as the inlet of the assembly socket 400, to the first unit 410, the cross-sectional area of ​​the washing water flow can be increased.

[0216] If the total cross-sectional area of ​​the wash water flow in the multiple second pipes 320b in the condenser 300 is greater than the cross-sectional area of ​​the wash water flow in the second unit 420 of the assembly socket 400, the delivery pressure of the wash water can be reduced. Therefore, the flow of wash water in the second pipes 320b is not smooth, and the flow rate in the second pipes 320b may be uneven.

[0217] If the flow rate in the multiple second tubes 320b becomes uneven, the heat exchange performance in the condenser 300 may deteriorate. Therefore, it is necessary to make the washing water flow cross-sectional area of ​​the assembly socket 400 similar to the total washing water flow cross-sectional area of ​​the second tubes 320b, and to make the flow rate of the washing water in the second tubes 320b uniform.

[0218] Due to friction with the inner wall of the socket 400 in the area adjacent to it (i.e., at the edge of the interior space of the socket 400), the washing water introduced into the socket 400 has a relatively slow flow rate. Meanwhile, the flow rate of the washing water is relatively faster at the center of the interior space of the socket 400.

[0219] As a result of this effect, the flow rate of the washing water in the multiple second pipes 320b can be distributed such that the flow rate of the washing water in the second pipes at the edges of the internal space of the housing 310 in the diametrical direction is relatively slow, while the flow rate of the washing water in the second pipes at the center of the internal space of the housing 310 in the diametrical direction is relatively fast.

[0220] Reference Figure 9 As the second tubes 320b are arranged sequentially in the diametrical direction from the edge toward the center of the internal space of the housing 310, the corresponding inner circumferential diameter ID of the second tubes 320b can be decreased sequentially.

[0221] For example, in an arrangement of multiple second tubes 320b, the inner circumferential diameter ID2 of the second tube 320b arranged near the center in the diametrical direction of the internal space of the housing 310 can be smaller than the inner circumferential diameter ID1 of the second tube 320b arranged near the edge in the diametrical direction of the internal space of the housing 310.

[0222] Due to this structure, the flow rate of the washing water is fast, but the flow cross-sectional area in the second pipe 320b with a small inner diameter ID at the center of the internal space of the housing 310 in the diametrical direction is small. Conversely, in the second pipe 320b with a large inner circumferential diameter ID at the edge of the internal space of the housing 310 in the diametrical direction, the flow rate is slow, but the flow cross-sectional area is large.

[0223] In this way, the flow rate of the washing water can be uniform in the plurality of pipes arranged along the diametrical direction of the internal space of the housing 310. Furthermore, the diameter of the second pipe 320b located at the center of the internal space of the housing 310 in the diametrical direction can be reduced. Therefore, the cross-sectional area of ​​the washing water flow in the second unit 420 of the mounting socket 400 can be similar to the total cross-sectional area of ​​the washing water flow in the second pipe 320b of the condenser 300.

[0224] This structure improves the heat exchange performance between the refrigerant and the washing water in the condenser 300.

[0225] Furthermore, the wash water can have a low temperature in the wash water inlet region A1 of the condenser 300 and a high temperature in its wash water outlet region A2. When the temperature difference between the refrigerant and the wash water increases, the heat exchange efficiency can increase. Therefore, in order to increase the heat exchange performance between the refrigerant and the wash water, it is necessary to increase the heat exchange area between the refrigerant and the wash water in the wash water inlet region A1 of the condenser 300, which has low-temperature wash water.

[0226] Reference Figure 10 As each of the second tubes extends along the flow direction of the washing water, the outer circumferential diameter OD of each of the second tubes 320b can be reduced. Specifically, the condenser 300 can be configured such that the outer circumferential diameter OD of the second tube 320b decreases as the second tube extends from the washing water inlet region A1 where the washing water is introduced to the washing water outlet region A2 where the washing water is discharged.

[0227] In the condenser 300, the outer circumferential diameter OD1 of the second tube 320b in the washing water inlet region A1 can be greater than the outer circumferential diameter OD2 of the second tube 320b in the washing water outlet region A2.

[0228] The outer circumferential diameter OD of the second tube 320b is large in the wash water inlet region A1 of the condenser 300, allowing the heat exchange area of ​​the second tube 320b to be correspondingly increased in the wash water inlet region A1 of the condenser 300. Therefore, the heat exchange capacity in the wash water inlet region A1 of the condenser 300 can be increased. Thus, the heat exchange performance in the condenser 300 can be effectively improved.

[0229] However, if the outer circumferential diameter OD of each of the multiple second tubes 320b is constant in the longitudinal direction of the housing 310, the internal space through which the refrigerant flows can be significantly reduced. This can decrease the refrigerant flow rate. Therefore, the heat exchange performance of the condenser 300 may deteriorate.

[0230] Therefore, in the wash water inlet region A1 of the condenser 300, the outer circumferential diameter OD of the second tube 320b can be relatively reduced. This ensures sufficient space within the housing 310 through which the refrigerant flows.

[0231] 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; A water collector, which is arranged below the bucket and configured to store washing water therein; A filter, installed at the water collector and configured to filter wash water to be collected toward the water collector, wherein the filter has through-holes for the wash water to flow through; and A condenser is arranged below the tank, wherein the 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 washing water and the refrigerant flow separately within the housing; and A first tube, which is received inside the housing, through which the refrigerant flows. The first distance, defined by the shortest straight-line distance between the inner surface of the housing and the outer surface of the first tube, is set to be greater than the diameter of each through hole in the through hole.

2. The dishwasher according to claim 1, wherein, The first tube is formed in the form of a spiral coil and is arranged inside the housing. The second distance, defined by the shortest straight-line distance between the outer surfaces of adjacent portions of the coil, is set to be greater than the diameter of each through hole in the through hole.

3. The dishwasher according to claim 2, wherein, The first distance or the second distance is in the range of 1.5 to 2.5 times the diameter of each of the through holes in the through hole.

4. The dishwasher according to claim 1, wherein, The size of the washing water flow cross-sectional area of ​​the condenser is set to be equal to or greater than the washing water flow cross-sectional area of ​​the washing water pipe, which is connected to a washing pump for delivering the washing water to the condenser.

5. A dishwasher, the dishwasher comprising a condenser through which wash water and refrigerant flow, wherein, The condenser includes: A housing that defines the external shape of the condenser and is configured such that the washing water and the refrigerant flow separately within the housing; and A second pipe, which is received inside the housing, through which the washing water flows. The second tube comprises a plurality of second tubes, which are received within the housing and arranged spaced apart from each other in the diametrical direction of the housing. Each of the plurality of second tubes is oriented such that the longitudinal direction of the second tube is parallel to the longitudinal direction of the housing. The total cross-sectional area of ​​water flow in the plurality of second pipes is equal to or greater than the cross-sectional area of ​​water flow in the washing water pipe, and the washing water pipe is connected to a washing pump for conveying the washing water to the second pipes.

6. The dishwasher according to claim 5, wherein, As the second tubes are arranged sequentially in the diametrical direction of the internal space of the housing from the edge toward the center, the corresponding inner circumferential diameters of the second tubes decrease sequentially.

7. The dishwasher according to claim 5, wherein, As each of the second tubes extends along the flow direction of the washing water, the outer circumferential diameter of each of the second tubes decreases.

8. The dishwasher according to claim 7, wherein, The condenser has a wash water inlet area and a wash water outlet area, wherein the wash water is introduced into the wash water inlet area and discharged from the wash water outlet area. As each of the second pipes extends from the washing water inlet area to the washing water outlet area, the outer circumferential diameter of each of the second pipes decreases.

9. The dishwasher according to claim 5, wherein, The condenser includes: A refrigerant inlet portion, the refrigerant inlet portion protruding outward from the housing, wherein the refrigerant is introduced into the housing through the refrigerant inlet portion; and The refrigerant outlet portion protrudes outward from the housing, wherein refrigerant from the interior of the housing is discharged through the refrigerant outlet portion. The refrigerant inlet portion and the refrigerant outlet portion are arranged to be spaced apart from each other in the longitudinal direction of the housing.

10. The dishwasher according to claim 9, wherein, The condenser includes a refrigerant flow path guide formed within the housing to block the flow of the refrigerant, thereby changing the flow direction of the refrigerant and increasing the flow length of the refrigerant within the housing.

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