Condenser and dish washer including same

Abstract

A condenser according to one embodiment may include a housing configured to allow cleaning water and refrigerant to flow separately inside. The housing may form the outer shape of the condenser. The condenser may include tubes. A plurality of tubes may be provided, separated from one another, inside the housing. Cleaning water may flow through the tubes. The condenser may include closures disposed at each of the two ends of the housing. The closures may close the two ends of the housing. A tube may be disposed through the closures. The condenser may include a sealing portion disposed to contact the closures. The sealing portion may be formed of a material having a melting temperature lower than that of the closures.

Description

Technology Field

[0001] The present invention relates to a dishwasher, and more specifically, to a dishwasher equipped with a heat pump system for heating washing water. Background Technology

[0002] The content described in this section merely provides background information regarding the present invention and does not constitute prior art.

[0003] A dishwasher is a device that uses detergent and washing water to clean dirt, such as food residue, stuck to dishes or cooking utensils.

[0004] A typical dishwasher includes a tub that provides a washing space, a rack provided within the tub for holding dishes, a spray arm that sprays wash water onto the rack, a sump that stores wash water, and a pump that supplies wash water stored in the sump to the spray arm.

[0005] The washing water used in a dishwasher may be at room temperature, but using high-temperature washing water can improve washing efficiency and reduce washing time. Therefore, washing or rinsing of dishes can be performed using high-temperature washing water in at least some of the processes during the operation of the dishwasher.

[0006] A heating device for heating the washing water may be equipped with, for example, an electric heater of the electric heating type, a heat pump system, etc.

[0007] Since heat pump systems are more energy-efficient than electric heaters, the adoption of heat pump systems for heating wash water in dishwashers has been increasing recently.

[0008] A heat pump system may be equipped with a condenser that heats the wash water by exchanging heat between the high-temperature refrigerant and the relatively low-temperature wash water. The wash water can be heated to a high temperature as it passes through the condenser.

[0009] In the condenser, the refrigerant and the wash water can flow separately. Accordingly, heat is transferred from the high-temperature refrigerant to the wash water, causing the refrigerant to condense and the wash water to be heated.

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

[0011] In the condenser, the refrigerant and flushing water must flow separately. If a leak occurs and water infiltrates the space where the refrigerant flows, the water can enter the compressor that circulates the refrigerant. Water entering the compressor can impact components such as the scroll and rotor, which can cause the compressor to fail.

[0012] In addition, the flushing water contains foreign substances such as food residue. If the water penetrates into the refrigerant flow space, these foreign substances also flow through the refrigerant circulation system along with the water, which can damage various devices, such as compressors, equipped in the circulation system. Furthermore, these foreign substances can cause the refrigerant piping in the refrigerant circulation system to become clogged.

[0013] Therefore, it is necessary to effectively block water from entering the refrigerant flow space from the condenser. The problem to be solved

[0014] The objective of the present invention is to provide a condenser having a structure capable of effectively blocking water from entering the refrigerant flow space.

[0015] In addition, the objective of the present invention is to provide a condenser comprising a sealing portion that blocks the inflow of water into the refrigerant flow space.

[0016] In addition, the objective of the present invention is to provide a dishwasher comprising the aforementioned condenser.

[0017] The objects of the present invention are not limited to those mentioned above, and other unmentioned objects and advantages of the present invention may be understood from the following description and will be more clearly understood from the embodiments of the present invention. Furthermore, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof set forth in the claims. means of solving the problem

[0018] A dishwasher according to one embodiment may include a condenser that condenses a refrigerant.

[0019] A condenser according to one embodiment may include a housing configured to allow cleaning water and refrigerant to flow separately inside. The housing may form the outer shape of the condenser.

[0020] The condenser may include tubes. Multiple tubes may be provided, separated from one another, within the housing. Washing water may flow through the tubes.

[0021] The condenser may include closures disposed at each of both ends of the housing. The closures may close both ends of the housing. A tube may be disposed through the closures.

[0022] The condenser may include a sealing portion positioned to be in contact with the closing portion. The sealing portion may be formed of a material having a melting temperature lower than that of the closing portion.

[0023] The closure part can be formed of stainless steel. The sealing part can be formed of copper.

[0024] The closing portion and the sealing portion may be formed in a disc shape. The sealing portion may include a first through-hole through which a tube passes. The closing portion may include a second through-hole through which a tube passes. The closing portion may include a second through-hole through which a tube passes.

[0025] The sealing portion may be provided to be melted by heating to seal the gap between the tube and the second through hole. Additionally, the molten sealing portion may be provided to seal the gap between the closure portion and the inner circumference of the housing.

[0026] The sealing portion may be positioned to contact the surface facing the inside of the housing of the closure portion.

[0027] The condenser may include an inlet portion through which refrigerant flows into the housing. The inlet portion may protrude from the housing. The condenser may include an outlet portion through which refrigerant is discharged from the housing. The outlet portion may protrude from the housing.

[0028] The inlet and outlet sections can be spaced apart from each other along the longitudinal direction of the housing.

[0029] The condenser may include a refrigerant flow guide that forms a refrigerant flow path. The refrigerant flow guide may be formed inside the housing.

[0030] A refrigerant flow guide may be provided to extend the flow length of the refrigerant in the housing by blocking the flow of the refrigerant and changing the direction of flow.

[0031] The refrigerant flow guides may be provided in multiple units spaced apart along the longitudinal direction of the housing.

[0032] Adjacent refrigerant flow guides can be alternately arranged in a zigzag pattern along the longitudinal direction of the housing. Accordingly, the refrigerant flow guides can be provided to block a portion of the refrigerant flow path formed inside the housing.

[0033] The dishwasher may include a fitting socket, one side of which is connected to a housing. The fitting socket may be provided such that the diameter of the side connected to the housing is larger than that of the other side.

[0034] The fitting socket may include a first cell connected to a condenser. The fitting socket may include a second cell disposed on the other side of the first cell.

[0035] The fitting socket may include a third cell positioned between the first cell and the second cell. The diameter of the third cell may gradually decrease as it approaches the second cell.

[0036] A condenser according to another embodiment may include a housing configured to allow cleaning water and refrigerant to flow separately inside. The housing may form the outer shape of the condenser.

[0037] The condenser may include an inlet portion through which refrigerant flows into the housing. The inlet portion may protrude from the housing. The condenser may include an outlet portion through which refrigerant is discharged from the housing. The outlet portion may protrude from the housing.

[0038] The condenser may include tubes. Multiple tubes may be provided, separated from one another, within the housing. Washing water may flow through the tubes.

[0039] The condenser may include closures disposed at each of both ends of the housing. The closures may close both ends of the housing. A tube may be disposed through the closures.

[0040] The condenser may include a sealing portion positioned to be in contact with the closing portion. The sealing portion may be formed of a material having a melting temperature lower than that of the closing portion.

[0041] A dishwasher according to one embodiment may include a tub in which dishes are received. The dishwasher may include a machine room disposed below the tub. The dishwasher may include a condenser received in the machine room.

[0042] The dishwasher may include a compressor housed in the machine room. The compressor may be connected to a condenser. The compressor may compress the refrigerant. Effects of the invention

[0043] In the condenser according to the present invention, the closing portion can be firmly joined to both sides of the housing by using a sealing portion made of a material having a lower melting temperature than the closing portion. At this time, the closing portion can be joined to the housing by brazing welding. The sealing portion can act as a filler material.

[0044] Therefore, the sealing portion can melt to completely seal the gap between the closure portion and the housing. Accordingly, it is possible to effectively block cleaning water from penetrating into the refrigerant flow space of the housing.

[0045] In addition, in the condenser according to the present invention, a pair of sealing parts may be disposed within the space formed by the housing and a pair of closing parts. Accordingly, when brazing welding is performed after the assembly of the condenser is completed, the sealing parts may not flow out of the condenser even if they are melted.

[0046] The filler material melts within the refrigerant flow path. Therefore, the exposure of the filler material to the outside of the closed section equipped with a metal disc can be minimized. In other words, by minimizing the external exposure of corrosive materials, such as copper filler material, rust formation can be suppressed. In particular, contact between the filler material and the wash water and the wash water flow path can be minimized. This means that even if rust occurs, contact with the wash water is minimized, which helps enhance the cleaning effect.

[0047] Accordingly, the molten sealing part can effectively seal the first gap and the second gap.

[0048] In addition, in the condenser according to the present invention, a sealing portion may be disposed to contact the closure portion in the space of the condenser formed by the housing portion and the closure portion. The sealing portion may be melted by performing brazing welding. The melted sealing portion can completely seal the gap between the housing and the closure portion. Additionally, the melted sealing portion can completely seal the gap between the tube and the closure portion.

[0049] Accordingly, the gap between the closed portion, where multiple holes are formed, and the housing, which may be formed with a complex structure and shape, can be effectively sealed. Therefore, compared to using a separate sealing mechanism, the structure of the condenser can be simplified while improving the reliability of the condenser seal.

[0050] In addition to the effects described above, the specific effects of the present invention are described together with the specific details for implementing the invention below. Brief explanation of the drawing

[0051] FIG. 1 is a cross-sectional view of a dishwasher according to one embodiment. FIG. 2 is a drawing for explaining a part placed on a base in a dishwasher according to one embodiment. FIG. 3 is a cross-sectional view of a condenser according to one embodiment. Fig. 4 is a perspective view of Fig. 3. Figure 5 is a drawing for explaining the structure of a condenser according to one embodiment. FIG. 6 is a drawing for explaining the structure of a condenser according to another embodiment. FIG. 7 is a drawing for explaining the structure of a condenser according to another embodiment. FIG. 8 is a drawing for explaining the structure of a condenser according to another embodiment. FIG. 9 is a drawing for explaining a refrigerant flow path guide according to one embodiment. FIG. 10 is a drawing for explaining the condenser mounting structure of a refrigerant flow path guide according to one embodiment. FIG. 11 is a drawing for explaining the condenser mounting structure of a refrigerant flow path guide according to another embodiment. FIG. 12 is a drawing for explaining the condenser mounting structure of a refrigerant flow path guide according to another embodiment. FIG. 13 is a drawing for explaining a refrigerant flow guide according to another embodiment and a condenser mounting structure of such a refrigerant flow guide. FIG. 14 is an exploded view of a condenser according to one embodiment. Figure 15 is a drawing showing the state in which the closing part and the sealing part are combined with the tube. FIG. 16 is a drawing showing a sealing portion according to one embodiment. Figure 17 is a drawing showing the closed portion coupled to the tube and housing. Figure 18 is a drawing showing the state after the brazing welding in Figure 17 is completed. Specific details for implementing the invention

[0052] The aforementioned objectives, features, and advantages are described in detail below with reference to the attached drawings, thereby enabling those skilled in the art to easily implement the technical concept of the present invention. In describing the present invention, detailed descriptions of known technologies related to the present invention are omitted if it is determined that such descriptions would unnecessarily obscure the essence of the invention. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, the same reference numerals are used to indicate the same or similar components.

[0053] Although terms such as "first," "second," etc., are used to describe various components, it goes without saying that these components are not limited by these terms. These terms are used merely to distinguish one component from another, and unless specifically stated otherwise, the first component may also be the second component.

[0054] Throughout the specification, unless specifically stated otherwise, each component may be singular or plural.

[0055] Singular expressions used in this specification include plural expressions unless the context clearly indicates otherwise. In this application, terms such as "composed of" or "comprising" should not be interpreted as necessarily including all of the various components or steps described in the specification, and should be interpreted as meaning that some of the components or steps may be omitted or additional components or steps may be included.

[0056] Throughout the specification, "A and / or B" means A, B, or A and B unless specifically stated otherwise, and "C to D" means C or more and D or less unless specifically stated otherwise.

[0057] In the specifications, terms such as "top," "bottom," and "side" are used to refer to parts or directions of the dishwasher as it is installed for general use.

[0058] FIG. 1 is a cross-sectional view of a dishwasher according to one embodiment. A dishwasher according to one embodiment may include a case (11) forming an exterior, a tub (12) in which dishes to be washed are received, a door (20) provided on the front of the tub (12) to open and close the tub (12), and a sump (100) provided on the lower side of the tub (12) in which washing water is stored.

[0059] Additionally, the dishwasher may include a plurality of spray arms (13, 14, 15) provided in a tub (12) for spraying washing water, a filter (110) provided in a sump (100) for filtering washing water sprayed from at least one of the plurality of spray arms (13, 14, 15) and recovered to the sump (100), a washing pump (150) for transporting washing water stored in the sump (100), and a switching valve (130) for flowing washing water transported by the washing pump (150) to at least one of the plurality of spray arms (13, 14, 15).

[0060] The tub (11) is formed in the shape of a cuboid with an open front, and a washing chamber (12a) can be formed inside. A communication hole is formed in the bottom (12b) of the tub (11) through which washing water flows into the sump (100). The washing chamber (12a) is provided with a plurality of racks (16, 17) for storing items to be washed. The plurality of racks (16, 17) may include a lower rack (16) positioned at the bottom of the washing chamber (12a) and an upper rack (17) positioned at the top. The lower rack (16) and the upper rack (17) are spaced apart vertically and can be slid out toward the front of the tub (11).

[0061] A plurality of spray arms (13, 14, 15) are arranged in an up-and-down direction. The plurality of spray arms (13, 14, 15) may include a lower spray arm (13) positioned at the bottom and spraying washing water from the bottom to the top toward the lower rack (16), an upper spray arm (14) positioned above the lower spray arm (13) and spraying washing water from the bottom to the top toward the upper rack (17), and a tower spray arm (15) positioned at the top of the washing room (12a) above the upper spray arm (14) and spraying washing water from the top to the bottom.

[0062] A plurality of spray arms (13, 14, 15) receive washing water from a washing pump (150) through a plurality of spray arm connecting channels (18, 19, 21). The plurality of spray arm connecting channels (18, 19, 21) may include a lower spray arm connecting channel (18) connected to a lower spray arm (13), an upper spray arm connecting channel (19) connected to an upper spray arm (14), and a tower spray arm connecting channel (21) connected to a tower spray arm (15).

[0063] The lower sandstone (13), upper sandstone (14) and tower sandstone (15) can each receive washing water from the washing pump (150) through the upper sandstone connecting channel (18), upper sandstone connecting channel (19), and tower sandstone connecting channel (21).

[0064] A sump (100) is positioned below the bottom (12b) of a tub (12) to collect wash water. A filter (110) can filter contaminants from the wash water moving from the tub (12) to the sump (100).

[0065] Washing water sprayed through multiple spray arms (13, 14, 15) falls to the bottom (12b) of the tub (12) along with contaminants adhering to the object to be washed. Accordingly, the dishware containing contaminants passes through a filter (110) arranged to communicate with the bottom (12b) of the tub (12), thereby filtering out the contaminants and allowing it to be stored in the sump (100).

[0066] During the washing operation, the washing water can wash dishes contained in the rack (16, 17) while circulating through the sump (100), spray arms (13, 14, 15), tub (12), and filter (110).

[0067] The washing pump (150) supplies washing water stored in the sump (100) to at least one of a plurality of spray arms (13, 14, 15). The washing pump (150) may include a washing motor that generates rotational force and an impeller that is rotated by the washing motor to transport washing water. The washing pump (150) may be connected to a switching valve (130) and a washing water supply path (180).

[0068] When the washing pump (150) is driven, the washing water stored in the sump (100) flows into the washing pump (150) through the collection channel (170) and can then be transferred to the switching valve (130) through the washing water supply channel (180).

[0069] The switching valve (130) selectively supplies washing water, which is transported by the washing pump (150), to at least one of the lower part sand arm (13), the upper part sand arm (14), and the top part sand arm (15). The switching valve (130) can selectively connect at least one of the washing water supply path (180) and the plurality of sand arm connection paths (18, 19, 21).

[0070] The sump (100) is connected to a water supply channel (23) through which washing water supplied from an external water source flows. The water supply channel (23) may be equipped with a water supply valve (22) that controls the washing water supplied from the external water source. The water supply valve (22) can supply washing water from the external water source to the sump (100). When the water supply valve (22) is opened, the washing water supplied from the external water source can flow into the sump (100) through the water supply channel (23).

[0071] A sump (100) may be connected to a drain channel (24) that drains washing water to the outside of the dishwasher. A drain pump (25) that drains washing water within the sump (100) through the drain channel (24) may be provided in the drain channel (24). When the drain pump (25) is operated, washing water stored in the sump (100) can be drained to the outside of the case (11) through the drain channel (24).

[0072] A heating device for heating the washing water may be provided inside the sump (100) or in the washing pump (150). The heating device may be provided, for example, as an electric heater, a heat pump system, etc.

[0073] In the embodiment, the washing water can be heated using a heat pump system. The heat pump system will be described first below.

[0074] A heat pump system is a system that pumps heat from a low-temperature environment to a high-temperature environment. At this time, such heat pumping can be implemented, for example, using a compressor (500). In an embodiment, a heat pump system can be implemented using a so-called two-phase flow refrigeration cycle, in which the temperature of the refrigerant is raised by compressing the two-phase flowing refrigerant in a gaseous state using a compressor (500).

[0075] A heat pump system carrying out a two-phase flow refrigeration cycle may include a compressor (500), a condenser (300), an expansion device, and an evaporator (600). Each of these components is connected to one another by piping, and as the refrigerant flows and circulates through these components, a phase change occurs and the temperature changes, allowing it to absorb heat from the surroundings or release heat to the surroundings.

[0076] The refrigerant may be introduced into the compressor (500) in a low-temperature gaseous state. In the compressor (500), the refrigerant may be compressed. At the outlet of the compressor (500), the refrigerant may be introduced into the condenser (300) in a superheated gaseous state at high temperature and high pressure.

[0077] In the condenser (300), the refrigerant and the washing water can flow separately. The refrigerant flows into the condenser (300) and exchanges heat with the washing water, and the washing water can be heated by receiving heat from the refrigerant.

[0078] The refrigerant can undergo a phase change from a superheated gaseous state to a saturated state where liquid and gas coexist while maintaining the same pressure in the condenser (300).

[0079] The refrigerant is introduced into the condenser (300) in a superheated state and transfers heat to the washing water, causing the temperature to drop. When it reaches a saturated state, the proportion of liquid can theoretically increase gradually at the same temperature. During this liquefaction process, the refrigerant releases a large amount of heat of liquefaction, and the washing water can be heated by receiving this heat.

[0080] The refrigerant may be introduced into the expansion device in a saturated liquid or super-cooled liquid state from the condenser (300). This expansion device may be equipped with, for example, an expansion valve or a capillary device.

[0081] The refrigerant can undergo adiabatic expansion in the expansion device, that is, theoretically, an expansion with the same enthalpy. During this expansion process, a portion of the refrigerant vaporizes, and consequently, the pressure of the refrigerant can be lowered. As a portion of the refrigerant vaporizes and releases heat of vaporization to the surroundings, the temperature of the entire refrigerant can be lowered. In other words, as the refrigerant passes through the expansion device, it can enter the evaporator (600) in a low-temperature and low-pressure state.

[0082] The refrigerant introduced into the evaporator (600) can gradually increase the proportion of gas while absorbing heat from the surroundings, which are at a relatively high temperature. In the evaporator (600), the proportion of gas can gradually increase while theoretically maintaining the same pressure and the same temperature.

[0083] The refrigerant discharged from the evaporator (600) may flow into the compressor (500) with some liquid present or slightly superheated. The refrigerant flowing into the compressor (500) may circulate through the compressor (500), condenser (300), expansion device, and evaporator (600) while repeating the process described above.

[0084] Typically, a refrigeration device is a device that utilizes the absorption of heat by a refrigerant in an evaporator (600). The heat pump system of the embodiment can utilize the heat released by the refrigerant in a condenser (300).

[0085] In a heat pump system, heat exchange occurs between a high-temperature refrigerant and a relatively low-temperature washing water in a condenser (300), and the washing water can be heated accordingly. The high-temperature washing water heated by the condenser (300) can wash or rinse dishes more easily compared to when it is at room temperature.

[0086] Meanwhile, this heat pump system does not need to always operate while the dishwasher is running. For example, when washing or rinsing with room temperature water, the compressor (500) is not operated, so that room temperature water can be sprayed onto the dishes without heating the washing water.

[0087] Even when the compressor (500) is stopped and the washing water is not heated, the washing water can pass through the condenser (300) and circulate throughout the dishwasher.

[0088] In another embodiment, by forming a bypass path that bypasses the condenser (300), the cleaning water can be diverted through the bypass path when the compressor (500) stops operating, thereby improving the performance of the condenser (300) and extending its lifespan.

[0089] FIG. 2 is a drawing for explaining components placed on a base (30) in a dishwasher according to one embodiment. Components constituting a heat pump system may be placed, for example, on the lower side of a tub (12).

[0090] The dishwasher may include a base (30) provided on the lower side of the tub (12). A heat pump system and other devices for driving the dishwasher may be placed on the base (30). The base (30) forms a space on the lower side of the tub (12), and this space may become a machine room where various machine parts are placed.

[0091] Accordingly, the dishwasher may include a machine room located at the lower side of the tub (12). The dishwasher may include a condenser (300) housed in the machine room. The dishwasher may include a compressor (500) housed in the machine room. The compressor (500) may be connected to the condenser (300). The compressor (500) may compress a refrigerant.

[0092] The dishwasher may include a mounting portion (40) on which a condenser (300) is mounted. The mounting portion (40) may be placed on the base (30). The mounting portion may be placed on the lower side of the tub (12).

[0093] The mounting portion (40) can generally be formed in a plate shape. Various parts can be attached to the upper surface of the mounting portion (40).

[0094] The mounting part (40) can be placed inside the base (30). The base (30) can be easily separated from the base (30). For example, the mounting part (40) can be mounted to the base (30) by a fastening mechanism. The mounting part (40) can be separated from the base (30) by releasing the fastening mechanism and sliding it as shown by the arrow in FIG. 2.

[0095] Alternatively, the mounting part (40) may be provided to be guided by a guide rail formed on the inner side of the base (30) and to slide from the base (30).

[0096] A condenser (300) can be placed in a mounting portion (40). A refrigerant and a cleaning water can flow separately in the condenser (300). The refrigerant can be condensed in the condenser (300). As the refrigerant condenses, it releases heat of liquefaction, and the cleaning water can be heated by the released heat of liquefaction.

[0097] Although not shown, the expansion valve can be placed in a suitable location on the mounting part (40). Since the expansion valve is small compared to other parts, it can be placed in a suitable space on the mounting part (40).

[0098] The dishwasher may include a water softening unit (41) that produces soft water. The water softening unit (41) may be mounted on a mounting unit (40). Soft water is water that has a very low content of minerals such as calcium and magnesium, or is water that does not contain them. When washing with soft water, the washing efficiency of the dishes can be improved, and the lifespan of the dishes can also be increased. Therefore, it is necessary to wash with soft water as needed.

[0099] In the embodiment, washing water is introduced into the water softening unit (41), and after being softened using the water softening unit (41), it can be used for dishwashing. However, the water softening unit (41) is not an essential component of the dishwasher.

[0100] The water softening section (41) can be connected to the sump (100) via piping. Therefore, water flowing into the water softening section (41) can be softened by the water softening section (41). The softened water discharged from the water softening section (41) can flow into the sump (100) and be used for cleaning.

[0101] The dishwasher may include a sump (100) in which wash water is stored. The sump (100) may be mounted on a mounting portion (40). The sump (100) may be positioned on the lower side of a tub (12).

[0102] Washing water stored in the sump (100) can be flowed by the washing pump (150) to wash dishes contained in the tub (12) while circulating through the sump (100), washing pump (150), a plurality of spray arms (13, 14, 15), and tub (12).

[0103] Of course, the washing water can be heated by a heat pump system and sprayed from a plurality of spray arms (13, 14, 15) at a high temperature to wash or rinse dishes contained in the tub (12), thereby improving washing efficiency.

[0104] Additionally, a cleaning pump (150) may be mounted on the mounting portion (40). Additionally, a compressor (500) may be mounted on the mounting portion (40). The compressor (500) may be connected to a condenser (300). The compressor (300) may compress a refrigerant.

[0105] In addition, an evaporator (600) can be mounted on the mounting part (40).

[0106] As described above, the compressor (500), condenser (300), expansion device, and evaporator (600) constituting the heat pump system are connected to each other by piping, and the refrigerant circulates through each component, undergoing a phase change and changing temperature and pressure.

[0107] Meanwhile, when the washing pump (150) is operated, the washing water flows sequentially through the washing pump (150), the condenser (300), the plurality of spray arms (13, 14, 15), the tub (12), and the sump (100), and then flows back into the washing pump (150) to circulate through the aforementioned components again.

[0108] In the condenser (300), heat exchange may occur between the refrigerant and the washing water. Accordingly, the washing water may be heated by absorbing heat from the refrigerant.

[0109] In order to increase the heat exchange performance between the refrigerant and the washing water, it is necessary to extend the flow length of the refrigerant inside the condenser (300). Due to this structure, the area and time during which heat exchange occurs between the refrigerant and the washing water are increased, thereby improving the heat exchange performance.

[0110] A good way to extend the flow length of the refrigerant is to extend the overall length of the condenser (300). However, this method has limitations due to spatial constraints inside the base (30).

[0111] Therefore, it is necessary to develop a structure that extends the flow length of the refrigerant in a condenser (300) of limited length. This structure will be explained in detail below.

[0112] FIG. 3 is a cross-sectional view of a condenser (300) according to one embodiment. FIG. 4 is a perspective view of FIG. 3.

[0113] The condenser (300) may include a housing (310) configured to allow cleaning water and refrigerant to flow separately inside. The housing (310) may form the outer shape of the condenser (300). A tube (320) may be accommodated inside the housing (310).

[0114] The housing (310) can generally be formed in a cylindrical shape with an internal space. The housing (310) can be formed from a robust material with excellent corrosion resistance, such as copper, aluminum, or stainless steel, so as to withstand high-pressure refrigerant.

[0115] A space through which a refrigerant flows may be formed inside the housing (310). As high-temperature refrigerant flows into this space, heat may be dissipated to the outside of the housing (310). Since such heat dissipation degrades the performance of the condenser (300), an insulating material may be provided on the outer surface of the housing (310) to surround the housing (310) in order to suppress external heat dissipation.

[0116] The condenser (300) may include tubes (320). The tubes (320) may be provided in multiple numbers that are separated from each other and arranged inside the housing (310). Washing water may flow through the tubes (320). The tubes (320) may be formed, for example, as pipes with a cylindrical cross-section and a hollow interior.

[0117] Each tube (320) may be spaced apart from each other. Specifically, each tube (320) may be spaced apart from each other in the diameter direction of the housing (310).

[0118] By providing multiple tubes (320), the contact area between the refrigerant and the washing water, i.e., the heat transfer area, can be improved. Additionally, as a result, uniform heat transfer occurs throughout the flowing refrigerant and washing water, thereby improving heat transfer efficiency.

[0119] The condenser (300) can be positioned so that its length direction is oriented toward the side of the dishwasher. The internal space of the base (30) on which the condenser (300) is positioned can be formed with a relatively narrow width in the vertical direction of the dishwasher and a relatively wide width in the lateral direction. This structure is formed to save the overall volume of the dishwasher.

[0120] Considering the structure of the internal space of the base (30), the condenser (300) can be positioned along the side of the dishwasher in the longitudinal direction. Accordingly, the condenser (300) can be efficiently positioned in the internal space of the relatively narrow base (30).

[0121] The condenser (300) may include an inlet portion (331) through which refrigerant flows into the housing (310). The inlet portion (331) may protrude from the housing (310). The condenser (300) may include an outlet portion (332) through which refrigerant is discharged from the housing (310). The outlet portion (332) may protrude from the housing (310).

[0122] For example, as shown in FIGS. 3 and 4, the inlet (331) and the outlet (332) may be formed in the shape of pipes having a predetermined length that protrudes in a direction intersecting the longitudinal direction of the housing (310).

[0123] One end of the inlet section (331) and the outlet section (332) can be connected to a pipe through which refrigerant flows.

[0124] The inlet (331) and the protrusion can be positioned in relation to the flow direction of the washing water and the refrigerant.

[0125] For example, if designed as an opposing type condenser (300) in which the flow directions of the washing water and the refrigerant are opposite to each other, the inlet section (331) may be positioned in a location adjacent to the outlet of the washing water in the condenser (300), and the outlet section (332) may be positioned in a location adjacent to the inlet of the washing water in the condenser (300).

[0126] As another example, when the condenser (300) is designed such that the flow directions of the washing water and the refrigerant are the same, the inlet section (331) may be positioned in a location adjacent to the inlet of the washing water in the condenser (300), and the outlet section (332) may be positioned in a location adjacent to the outlet of the washing water in the condenser (300).

[0127] The inlet section (331) and the outlet section (332) may be spaced apart from each other along the longitudinal direction of the housing (310). Since the refrigerant introduced into the housing (310) may not flow and may stagnate in the corners of the housing (310), it is necessary to position the inlet section (331) and the outlet section (332) in a way that can reduce such stagnation areas.

[0128] The inlet section (331) and the outlet section (332) can be positioned between adjacent tubes (320) among a plurality of tubes (320). Thus, the refrigerant can pass through the gap between adjacent tubes (320).

[0129] It is necessary to set the diameter of the tube (320) to be as large as possible so that foreign substances, such as food residue, do not get stuck inside the tube (320) when the cleaning water moves into the tube (320). Accordingly, the tube (320) can be installed so that it comes into contact with or comes as close as possible to the inner wall of the housing (310). Therefore, the area where the tube (320) comes into contact with or is close to the inner wall is narrow, making it difficult for the refrigerant to pass through.

[0130] Therefore, it is appropriate to place the inlet (331) or outlet (332) in a relatively wide space between adjacent tubes (320). Accordingly, the refrigerant can smoothly flow into the housing (310) or be discharged from the housing.

[0131] The inlet section (331) and the outlet section (332) can be positioned at the bottom of the housing (310) of the condenser (300). Therefore, when maintaining the condenser (300), the work can be performed by opening only the front of the dishwasher and working through the gap in the front, without the need to remove the mounting section (40) from the base (30) or disassemble the mounting section (40).

[0132] The condenser (300) may be positioned along the side of the dishwasher in a longitudinal direction. Accordingly, the inlet (331) and the outlet (332) may be positioned spaced apart from each other along the side of the dishwasher.

[0133] Since the refrigerant introduced into the housing (310) may not flow and may become stagnant in the corners of the housing (310), it is necessary to position the inlet (331) and outlet (332) to reduce such stagnant areas.

[0134] The inlet section (331) and the outlet section (332) can be positioned adjacent to each of the two ends of the condenser (300). With this structure, the area where the refrigerant does not flow and remains stagnant at each corner inside the housing (310) can be reduced.

[0135] However, the inlet section (331) and the outlet section (332) may be provided at a location that avoids the position where the refrigerant flow guide (340) is placed in order to ensure smooth flow of the refrigerant.

[0136] The outlet portion (332) can be formed to penetrate the housing (310) at the bottom of the condenser (300).

[0137] In the drawings from Figure 3 onwards, the arrow and the letter G indicate the direction in which gravity acts, that is, the direction of gravity (G).

[0138] The refrigerant is introduced into the condenser (300) in a gaseous state and can be liquefied as it flows through the condenser (300) and releases heat. Therefore, as the refrigerant approaches the outlet (332), it changes entirely into liquid or almost entirely into liquid.

[0139] The liquid can descend under the influence of gravity. If the outlet (332) is positioned at the top of the condenser (300) and protrudes in a direction opposite to the direction of gravity (G), the liquid refrigerant will have difficulty escaping the condenser (300).

[0140] Accordingly, in the embodiment, the outlet portion (332) can be formed to penetrate the housing (310) at the bottom of the condenser (300). Accordingly, the outlet portion (332) can be positioned so that its longitudinal direction protrudes toward the direction of gravity (G).

[0141] Due to this structure, the liquid refrigerant accumulated near the outlet (332) can be smoothly discharged from the condenser (300) through the outlet (332) by gravity. Therefore, the refrigerant can flow smoothly throughout the condenser (300).

[0142] The dishwasher may include a fitting socket (400) on one side that is connected to a housing (310). The fitting socket (400) may be provided such that the diameter of the side connected to the housing (310) is larger than that of the other side.

[0143] The fitting socket (400) can be detachably connected to the housing (310) or the washing water pipe.

[0144] The fitting sockets (400) may be provided as a pair connected to each side of the condenser (300). The pair of fitting sockets (400) may be provided to have a shape symmetrical with respect to the condenser (300).

[0145] The fitting socket (400) can connect the housing (310) of the condenser (300) with a large diameter and the cleaning water pipe with a small diameter. Cleaning water can flow from the cleaning water pipe into the housing (310).

[0146] Additionally, the washing water can be discharged from the housing (310) and flow into the washing water pipe. The fitting socket (400) can connect the housing (310) and the washing water pipe with different diameters.

[0147] The fitting socket (400) may include a first cell (410) connected to a condenser (300). The first cell (410) may have a larger diameter than the second cell (420). The fitting socket (400) may include a second cell (420) positioned on the other side of the first cell (410). The second cell (420) may have a smaller diameter than the first cell (410).

[0148] The fitting socket (400) may include a third cell (430) positioned between the first cell (410) and the second cell (420). The diameter of the third cell (430) may gradually decrease as it approaches the second cell (420). The diameter of the third cell (430) may gradually decrease along the direction of flow of the washing water.

[0149] As the washing water passes through the third cell (430), the flow cross-sectional area may gradually increase or decrease due to the structure of the third cell (430). Due to this structure, the flow of washing water discharged from the condenser (300) can be relatively stabilized compared to cases where the flow cross-sectional area rapidly increases or decreases. Accordingly, the flow resistance of the washing water can be reduced.

[0150] Therefore, the flow cross-sectional area of ​​the cleaning water flowing into the tube (320) accommodated in the housing (310) of the condenser (300) can gradually increase as it passes through the fitting socket (400). Thus, the cleaning water can flow smoothly into the condenser (300).

[0151] Additionally, the flow cross-sectional area of ​​the washing water discharged from the condenser (300) can be gradually reduced as it passes through the fitting socket (400). Therefore, the washing water can be discharged smoothly from the condenser (300). Furthermore, the washing water can flow smoothly in the subsequent washing water piping.

[0152] The condenser (300) may include a closure (350) disposed at each of both ends of the housing (310). The closure (350) may close both ends of the housing (310). A tube (320) may be disposed through the closure (350).

[0153] The closure portion (350) can generally be formed in a disc shape. The closure portion (350) can seal the internal space of the housing (310) by blocking both sides of the cylindrical housing (310). The closure portion (350) can be provided as a pair, each positioned on both sides of the housing (310).

[0154] Since high-pressure refrigerant flows through the internal space of the housing (310), the closure part (350) needs to be firmly connected to the housing (310). In addition, the space between the closure part (350) and the housing (310) needs to be completely sealed.

[0155] Accordingly, the closure (350) may be formed of the same metal material as the housing (310). Additionally, the closure (350) and the housing (310) may be firmly joined, for example by brazing welding, so that the space between them is completely sealed.

[0156] A hole through which a tube (320) passes may be formed in the closure portion (350). Since the tube (320) is provided in multiple numbers, such a hole may also be provided in multiple numbers corresponding to the number of tubes (320).

[0157] It is necessary to seal the gap between the hole and the tube (320) so that no gap is formed. Accordingly, the tube (320) can also be firmly joined to the closure (350) by brazing welding at the point where it passes through the hole. As a result, the gap between the tube (320) and the closure (350) can be completely sealed.

[0158] The condenser (300) may include a refrigerant flow guide (340) that forms a refrigerant flow path. The refrigerant flow guide (340) may be formed inside the housing (310).

[0159] The refrigerant flow guide (340) can be in the form of a plate. The refrigerant flow guide (340) can be in the form of a circular disc.

[0160] The refrigerant flow guide (340) can be a baffle used in a heat exchanger. That is, it can be a thin plate or sheet positioned perpendicular to the direction of fluid flow inside the housing (310).

[0161] The refrigerant flow guide (340) can block the flow of the refrigerant to change the flow path of the refrigerant. Accordingly, the flow length of the refrigerant can be extended. 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 the heat pump system and the dishwasher equipped with it can be improved.

[0162] Additionally, foreign substances such as food residue may remain inside the tube (320). The refrigerant may strike the refrigerant flow guide (340) vertically, causing vibration in the tube (320) and helping to discharge the foreign substances remaining inside the tube (320).

[0163] The refrigerant flow guide (340) may be positioned at a location spaced apart from the inlet section (331) and the outlet section (332) along the longitudinal direction of the housing (310). For example, as shown in FIG. 3, when a plurality of refrigerant flow guides (340) are provided, the inlet section (331) and the outlet section (332) may be positioned between adjacent refrigerant flow guides (340).

[0164] If the refrigerant flow guide (340) is positioned in a location that overlaps with the inlet section (331) or the outlet section (332), the refrigerant flow guide (340) may obstruct the refrigerant from flowing into the housing (310). Alternatively, the refrigerant flow guide (340) may obstruct the refrigerant from being discharged from the housing (310).

[0165] In an embodiment, the refrigerant flow guide (340) can be positioned at a location spaced apart from the inlet (331) and the outlet (332) in the housing (310). This allows the refrigerant flow guide (340) not to obstruct the inflow of refrigerant from the inlet (331) and the outlet (332). Accordingly, the flow of refrigerant in the condenser (300) can proceed smoothly.

[0166] The refrigerant flow guide (340) may protrude from the inner wall surface of the housing (310). The refrigerant flow guide (340) may be positioned to protrude in a direction intersecting the longitudinal direction of the housing (310).

[0167] The refrigerant introduced into the housing (310) can flow along the longitudinal direction of the housing (310). As the refrigerant flows in the housing (310), it can exchange heat with the cleaning water.

[0168] The refrigerant flow guide (340) protrudes to intersect the longitudinal direction of the housing (310) and can block the refrigerant flowing along the longitudinal direction of the housing (310). Therefore, the refrigerant can flow by bypassing the refrigerant flow guide (340). Accordingly, the flow length of the refrigerant in the housing (310) can be extended.

[0169] Meanwhile, the refrigerant flow guide (340) can be combined with a plurality of tubes (320) to support these tubes (320). Additionally, the refrigerant flow guide (340) can maintain a spacing between the plurality of tubes (320).

[0170] Hereinafter, with reference to the drawings, the structure in which the refrigerant flow guide (340) is placed in the internal space of the housing (310) will be described in detail.

[0171] FIG. 5 is a drawing for explaining the structure of a condenser (300) according to one embodiment. In FIG. 5 to 9 below, the illustration of the tube (320) has been omitted for clear explanation.

[0172] As illustrated in FIG. 5, the refrigerant flow guide (340) may be positioned between the inlet (331) and the outlet (332) of the housing (310). For example, the refrigerant flow guide (340) may be provided as a single unit. In this case, the refrigerant introduced into the inlet (331) may proceed toward the outlet (332), but a portion of it may be blocked by the refrigerant flow guide (340).

[0173] The refrigerant blocked by the refrigerant flow guide (340) has its flow direction changed and can continue to flow toward the outlet section (332) through the passage between the edge of the refrigerant flow guide (340) and the inner surface of the housing (310).

[0174] Accordingly, a portion of the refrigerant flowing through the housing (310) may be blocked by the refrigerant flow guide (340) and its flow direction may be changed. The refrigerant may flow by bypassing the refrigerant flow guide (340). Therefore, the refrigerant flow guide (340) can extend the flow length of the refrigerant in the housing (310).

[0175] FIG. 6 is a drawing for explaining the structure of a condenser (300) according to another embodiment. A plurality of refrigerant flow guides (340) may be provided spaced apart along the longitudinal direction of the housing (310). When a plurality of refrigerant flow guides (340) are provided, the flow length of the refrigerant may be further extended.

[0176] However, if multiple refrigerant flow guides (340) are positioned at the same or similar locations along the longitudinal direction of the housing (310), the flow length of only a portion of the refrigerant may be extended. In areas where refrigerant flow guides (340) are not positioned along the longitudinal direction of the housing (310), the refrigerant may flow without changing the direction of flow.

[0177] Accordingly, in order to extend the flow length of as much refrigerant as possible, a plurality of refrigerant flow guides (340) can be arranged in a zigzag shape along the length of the housing (310).

[0178] As shown in FIG. 6, adjacent refrigerant flow guides (340) can be alternately arranged in a zigzag pattern along the longitudinal direction of the housing (310). Accordingly, the refrigerant flow guides (340) can be provided to block a portion of the refrigerant flow path formed inside the housing (310).

[0179] For example, a portion of the refrigerant flow guide (340) may be positioned at the top of the housing (310). Another portion of the refrigerant flow guide (340) may be positioned at the bottom of the housing (310). Adjacent refrigerant flow guides (340) may be positioned at different locations within the housing (310). Thus, a plurality of refrigerant flow guides (340) may be alternately positioned in a zigzag pattern along the longitudinal direction of the housing (310).

[0180] For example, the refrigerant introduced into the housing (310) may flow along the longitudinal direction of the housing (310) and be blocked by a refrigerant flow guide (340) positioned at the top of the housing (310). The refrigerant may then flow downward again along the longitudinal direction of the housing (310). The refrigerant may then be blocked again by a refrigerant flow guide (340) positioned at the bottom of the housing (310). The refrigerant may then flow upward again along the longitudinal direction of the housing (310).

[0181] Accordingly, the refrigerant can sequentially flow horizontally, downward, horizontally, upward, and horizontally within the housing (310), for example. Accordingly, the flow length of the refrigerant within the housing (310) can be effectively extended.

[0182] In an embodiment, the refrigerant flow guides (340) may be provided in multiple numbers. The multiple refrigerant flow guides (340) may be spaced apart from each other along the longitudinal direction of the housing (310). The multiple refrigerant flow guides (340) may be arranged alternately in a zigzag pattern along the longitudinal direction of the housing (310).

[0183] Due to this structure, the refrigerant in the housing (310) can be blocked by a plurality of refrigerant flow guides (340), allowing the flow direction to be changed multiple times. Accordingly, the flow length of the refrigerant in the housing (310) can be effectively extended. As a result, the heat exchange performance between the refrigerant and the cleaning water in the condenser (300) can be improved.

[0184] FIG. 7 is a drawing for explaining the structure of a condenser (300) according to another embodiment. FIG. 7 is a structure in which a larger number of refrigerant flow guides (340) are arranged along the longitudinal direction of the housing (310) compared to the refrigerant flow guide (340) shown in FIG. 6.

[0185] As the number of refrigerant flow guides (340) placed in the housing (310) increases, the flow length of the refrigerant can be extended further. However, in this case, the flow resistance of the refrigerant inside the housing (310) increases, and the manufacturing cost of the condenser (300) may increase. In addition, in this case, the amount of liquid refrigerant condensed inside the housing (310) that cannot be discharged outside the housing (310) and remains in the housing (310) may increase.

[0186] Therefore, considering the aforementioned trend, the number of refrigerant flow guides (340) needs to be appropriately selected.

[0187] FIG. 8 is a drawing for explaining the structure of a condenser (300) according to another embodiment. As shown in FIG. 8, the refrigerant flow guide (340) may be formed in a threaded shape along the longitudinal direction of the housing (310).

[0188] The refrigerant is guided by a threaded refrigerant flow guide (340) and can flow in a threaded shape along the longitudinal direction of the housing (310). Accordingly, the flow length of the refrigerant in the housing (310) can be effectively extended compared to linear flow.

[0189] The specific shape of the refrigerant flow guide (340) and the mounting structure in the condenser (300) will be described in detail below with reference to the drawings.

[0190] FIG. 9 is a drawing for explaining a refrigerant flow guide (340) according to one embodiment. The refrigerant flow guide (340) may include a through hole (341) through which a tube (320) passes. The refrigerant flow guide (340) may include a seating groove (342) into which the tube (320) is seated.

[0191] The tubes (320) may be provided in multiple numbers inside the housing (310). Accordingly, the through holes (341) and the seating grooves (342) may be provided in multiple numbers so that multiple tubes (320) can be mounted.

[0192] The refrigerant flow guide (340) may have a straight section (343) in which a plurality of seating grooves (342) are formed. The refrigerant flow guide (340) may have a curved section (344) connected to the straight section (343) and forming an outer circumference. The refrigerant flow guide (340) may be formed in a semicircular shape.

[0193] The refrigerant flow guides (340) may be provided in multiple units spaced apart along the longitudinal direction of the housing (310). Of course, as previously described, the refrigerant flow guides (340) may be arranged to intersect each other in a zigzag pattern along the longitudinal direction of the housing (310). Accordingly, the flow length of the refrigerant can be effectively extended.

[0194] FIG. 10 is a drawing for explaining the mounting structure of a condenser (300) of a refrigerant flow path guide (340) according to one embodiment.

[0195] As illustrated in FIG. 10, some of the plurality of refrigerant flow guides (340) may be positioned at the bottom of the housing (310). At this time, the refrigerant flow guides (340) may be positioned such that the straight portion (343) is on the upper side and the curved portion (344) is on the lower side.

[0196] Of course, some of the plurality of refrigerant flow guides (340) may be positioned on the upper part of the housing (310), and the plurality of refrigerant flow guides (340) may be arranged in a zigzag shape along the longitudinal direction of the housing (310) overall. The plurality of refrigerant flow guides (340) may be positioned at locations symmetrical to each other with respect to the center of the housing (310) overall.

[0197] This structure can effectively guide the flow direction of the refrigerant in the housing (310) when both the inlet section (331) and the outlet section (332) are provided at the bottom of the housing (310).

[0198] However, in this structure, some of the refrigerant flow guides (340) block the flow of refrigerant at the bottom of the internal space of the housing (310). The refrigerant can condense inside the housing (310). The condensed liquid refrigerant can move in the direction of gravity (G). As a result, the liquid refrigerant can accumulate at the bottom of the internal space of the housing (310).

[0199] Therefore, in the structure illustrated in FIG. 10, the refrigerant flow guide (340) may obstruct the flow of liquid refrigerant to the outlet (332). It is necessary to improve this problem. A structure that improves this is the structure disclosed in FIG. 11 to FIG. 13.

[0200] FIG. 11 is a drawing for explaining the mounting structure of a condenser (300) of a refrigerant flow guide (340) according to another embodiment. The refrigerant flow guide (340) may be provided in multiple units spaced apart along the longitudinal direction of the housing (310).

[0201] As illustrated in FIG. 11, a plurality of refrigerant flow guides (340) may be provided such that the direction of the straight portion (343) is parallel to the up-down direction of the condenser (300). The plurality of refrigerant flow guides (340) may be arranged at positions that are symmetrical to each other with respect to the center of the housing (310) overall.

[0202] Due to this structure, at least a portion of the bottom of the internal space of the housing (310) can be left open without being blocked by the refrigerant flow guide (340). Therefore, liquid refrigerant accumulated at the bottom of the internal space of the housing (310) due to gravity can move smoothly to the outlet (332) through the open area without being obstructed by the refrigerant flow guide (340).

[0203] Accordingly, the phenomenon of liquid refrigerant remaining inside the housing (310) can be effectively suppressed.

[0204] FIG. 12 is a drawing for explaining the mounting structure of a condenser (300) of a refrigerant flow guide (340) according to another embodiment. The refrigerant flow guide (340) may be provided in multiple units spaced apart along the longitudinal direction of the housing (310).

[0205] As shown in FIG. 12, a plurality of refrigerant flow guides (340) may be positioned at a location spaced apart from the lower part of the housing (310). The plurality of refrigerant flow guides (340) may be positioned such that the direction of the straight portion (343) is inclined with respect to the vertical direction of the condenser (300).

[0206] At this time, a plurality of refrigerant flow guides (340) may be arranged to intersect in a zigzag pattern along the longitudinal direction of the housing (310). However, all refrigerant flow guides (340) may be spaced apart from the lower part of the housing (310). Additionally, all refrigerant flow guides (340) may be arranged so that the direction of the straight section (343) is inclined with respect to the vertical direction of the condenser (300).

[0207] As described above, due to this structure, at least a portion of the bottom of the internal space of the housing (310) can be left open without being blocked by the refrigerant flow guide (340). Therefore, the liquid refrigerant accumulated in the lower part of the internal space of the housing (310) due to gravity can move smoothly to the outlet (332) through the open area without being obstructed by the refrigerant flow guide (340).

[0208] FIG. 13 is a drawing for explaining a refrigerant flow guide (340) according to another embodiment and a mounting structure for a condenser (300) of the refrigerant flow guide (340). The refrigerant flow guide (340) may be provided in multiple units spaced apart along the longitudinal direction of the housing (310).

[0209] As shown in FIG. 13, the refrigerant flow guide (340) may be formed in an arc shape. At this time, the angle of the arc of the refrigerant flow guide (340) may be generally 90°. The refrigerant flow guide (340) may be arranged in multiple numbers, for example, two or three, in the circumferential direction of the housing (310).

[0210] Additionally, the circumferential position of the housing (310) of each refrigerant flow guide (340) can be positioned at different angle positions. Due to this structure, the refrigerant guided by the refrigerant flow guide (340) can flow in a threaded shape along the longitudinal direction of the housing (310). Accordingly, the flow length of the refrigerant in the housing (310) can be further extended.

[0211] Some of the multiple refrigerant flow guides (340) may be arranged so that the straight portion (343) of the outline is parallel to the vertical direction of the condenser (300).

[0212] As described above, due to this structure, at least a portion of the bottom of the internal space of the housing (310) can be left open without being blocked by the refrigerant flow guide (340). Therefore, the liquid refrigerant accumulated in the lower part of the internal space of the housing (310) due to gravity can move smoothly to the outlet (332) through the open area without being obstructed by the refrigerant flow guide (340).

[0213] FIG. 14 is an exploded view of a condenser (300) according to one embodiment.

[0214] In the condenser (300), the refrigerant and the cleaning water need to flow separately. If a leak occurs and water penetrates into the space where the refrigerant flows, the water may flow into the compressor (500) that circulates the refrigerant. The water flowing into the compressor (500) may impact the scroll, rotor, etc. of the compressor (500), which may cause damage to the compressor (500).

[0215] In addition, the washing water contains foreign substances such as food residue. If the water penetrates into the refrigerant flow space, these foreign substances may also flow through the refrigerant circulation system along with the water, potentially damaging various devices such as the compressor (500) installed in the circulation system. Furthermore, these foreign substances may cause the refrigerant pipes in the refrigerant circulation system to become clogged.

[0216] The part where water, i.e., cleaning water, flows into the refrigerant flow space inside the housing (310) in the condenser (300) may be a closed part (350).

[0217] For example, the outer circumference of the closure portion (350) may be joined by contacting the inner circumference of a hollow cylindrical housing (310). At this time, at least a portion between the outer circumference of the closure portion (350) and the inner circumference of the housing (310) may not be sealed, so a gap may occur. Cleaning water from the fitting socket (400) may flow into the refrigerant flow space of the housing (310) through this gap (hereinafter, the first gap).

[0218] Additionally, for example, a second through-hole (351) through which the tube (320) passes may be formed in the closed portion (350). A gap may occur between the outer circumference of the tube (320) and the inner circumference of the second through-hole (351). Cleaning water from the fitting socket (400) may flow into the refrigerant flow space of the housing (310) through this gap (hereinafter referred to as the second gap).

[0219] The aforementioned first and second gaps must be completely sealed to prevent the inflow of cleaning water into the refrigerant flow space of the housing (310). For this sealing, the condenser (300) may be provided with a sealing portion (360).

[0220] FIG. 15 is a drawing showing the state in which the closing part (350) and the sealing part (360) are combined with the tube (320). FIG. 16 is a drawing showing the sealing part (360) according to one embodiment.

[0221] The condenser (300) may include a sealing portion (360) positioned to be in contact with the closing portion (350). The sealing portion (360) may be formed of a material having a melting temperature lower than that of the closing portion (350). Accordingly, when the closing portion (350) and the sealing portion (360) are heated to a temperature at which the closing portion (350) does not melt but the sealing portion (360) melts, the sealing portion (360) melts and can seal the aforementioned first gap and second gap.

[0222] That is, the closure (350) can be joined to the housing (310) and tube (320) by blazing welding. Blazing welding can heat the base material and the filler material at a temperature below the melting point of the base material. In this case, the base material is not melted, but only the filler material is melted, and the base materials are joined together by the filler material.

[0223] In the embodiment, the closure part (350), housing (310) and tube (320) are base materials, and the sealing part (360) can act as a filler material.

[0224] Accordingly, the closing portion (350) may be formed of a material having a higher melting temperature than the sealing portion (360). For example, the closing portion (350) may be formed of stainless steel. The sealing portion (360) may be formed of copper. In this case, stainless steel and copper are materials with high corrosion resistance to cleaning water.

[0225] At this time, the housing (310) and tube (320) that serve as the base material can also be formed of stainless steel.

[0226] In an embodiment, the sealing portion (360) can be firmly joined to both sides of the housing (310) by using a sealing portion (360) made of a material having a lower melting temperature than the sealing portion (350). At this time, the sealing portion (350) can be joined to the housing (310) by brazing welding. The sealing portion (360) can act as a filler material.

[0227] Accordingly, the sealing portion (360) can be melted to completely seal the gap between the closing portion (350) and the housing (310). As a result, the cleaning water can be effectively blocked from penetrating the refrigerant flow space of the housing (310).

[0228] In the embodiment, the closing portion (350) and the sealing portion (360) may be provided with similar shapes. Additionally, the closing portion (350) and the sealing portion (360) may each be provided as a pair to be connected to both sides of the housing (310).

[0229] The closing portion (350) and the sealing portion (360) may be formed in a disc shape. A plurality of tubes (320) may pass through the closing portion (350) and the sealing portion (360).

[0230] Accordingly, the sealing portion (360) may include a first through hole (361) through which the tube (320) passes. The closing portion (350) may include a second through hole (351) through which the tube (320) passes.

[0231] The sealing portion (360) may be provided to be melted by heating to seal the gap between the tube (320) and the second through hole (351). Additionally, the melted sealing portion (360) may be provided to seal the gap between the closing portion (350) and the inner circumference of the housing (310).

[0232] In the absence of the sealing portion (360), a gap, i.e., a first gap, may occur between the closing portion (350) and the inner circumference of the housing (310). Additionally, a gap, i.e., a second gap, may occur between the tube (320) and the second through hole (351). The sealing portion (360) can be melted to completely seal the first gap and the second gap.

[0233] FIG. 17 is a drawing showing the closed portion (350) coupled to the tube (320) and the housing (310).

[0234] The sealing portion (360) may be positioned to contact the surface of the housing (310) facing the interior of the closing portion (350). Referring to FIGS. 15 and 17, a pair of closing portions (350) may each be positioned at both ends of the housing (310). At this time, a pair of sealing portions (360) may be positioned between the pair of closing portions (350). And a pair of sealing portions (360) may be positioned inside the housing (310).

[0235] Due to this structure, the sealing portion (360) may not be visible when viewing the condenser (300) from the outside.

[0236] That is, a pair of sealing parts (360) each contact a pair of closing parts (350), and can be positioned inside the space formed by the housing (310) and the pair of closing parts (350).

[0237] Accordingly, when brazing welding is performed after the assembly of the condenser (300) is completed, the sealing portion (360) may not flow out of the condenser (300) even if it is melted.

[0238] That is, since the molten sealing part (360) is inside the condenser (300) and does not flow out to the outside, the first gap and the second gap can be effectively sealed inside the condenser (300). In addition, because the sealing part (360) is located inside the condenser (300), the trace of the molten sealing part (360) flowing out to the outside of the condenser (300) is relatively small, so it can be visually cleaner.

[0239] When the worker joins the closure part (350) to the housing (310), the work can proceed in the following order.

[0240] First, the operator can assemble the tube (320), housing (310), sealing part (360), and closing part (350). At this time, a pair of sealing parts (360) may be placed inside the housing (310). A pair of sealing parts (360) may be placed to contact each of a pair of closing parts (350).

[0241] Next, the operator can heat the sealing portion (360). The heating device may be equipped with, for example, an electric welding device, a gas welding device, a torch with heat capable of melting copper, or various other devices.

[0242] The sealing portion (360) can be heated and melted. At this time, since the sealing portion (360) is placed inside the condenser (300), the amount of sealing portion (360) melted by brazing welding flowing out of the condenser (300) is small, so work efficiency is improved and convenience can be provided to the worker.

[0243] FIG. 18 is a drawing showing the state in which the brazing welding in FIG. 17 is completed. Once the brazing welding is completed, the sealing part (360) inside the condenser (300) can be melted.

[0244] When the brazing welding is completed, a small amount of molten sealing material (360) may flow out through a first gap forming a large circle between the housing (310) and the closure (350), and a second gap forming a small circle between the housing (310) and the plurality of tubes. The flowed-out sealing material (360) may adhere to and harden on the outer surface of the housing (310) or the closure (350).

[0245] Accordingly, when viewed from outside the condenser (300), as shown in FIG. 18, some molten sealing (360) can be found in the aforementioned gaps.

[0246] In an embodiment, a sealing portion (360) may be positioned to contact the closure portion (350) in the space of the condenser (300) formed by the housing (310) and the closure portion (350). The sealing portion (360) may be melted by brazing welding. The melted sealing portion (360) can completely seal the gap between the housing (310) and the closure portion (350). Additionally, the melted sealing portion (360) can completely seal the gap between the tube (320) and the closure portion (350).

[0247] Accordingly, the gap between the closing part (350), in which multiple holes are formed, and the housing (310), which can be formed with a complex structure and shape, can be effectively sealed. Therefore, compared to the case where a separate sealing mechanism is used, the structure of the condenser (300) can be simplified, and the reliability of the condenser (300) sealing can be improved.

[0248] Although the present invention has been described above with reference to the illustrated drawings, the present invention is not limited by the embodiments and drawings disclosed in this specification, and it is obvious that various modifications can be made by a person skilled in the art within the scope of the technical concept of the present invention. Furthermore, even if the effects of the configuration according to the present invention were not explicitly described while explaining the embodiments of the present invention above, it is natural to acknowledge that the effects predictable by said configuration should also be recognized. Explanation of the symbols

[0249] Condenser (300) Housing (310) Tube (320) Entrance (331) Exit section (332) Refrigerant flow guide (340) Closed part (350) Sealing part (360)

Claims

Claim 1 A dishwasher comprising a condenser, wherein the condenser comprises: a housing having an outer shape and configured to allow washing water and a refrigerant to flow separately inside; a plurality of tubes configured to flow through which washing water flows, each arranged separately from one another inside the housing; a closing portion each disposed at both ends of the housing, closing both ends of the housing, and through which the tubes pass; and a sealing portion disposed to contact the closing portion and formed of a material having a melting temperature lower than that of the closing portion. Claim 2 A dishwasher according to claim 1, wherein the closing portion is formed of stainless steel and the sealing portion is formed of copper. Claim 3 A dishwasher according to claim 1, wherein the closing portion and the sealing portion are formed in a disc shape, the sealing portion includes a first through hole through which the tube passes, and the closing portion includes a second through hole through which the tube passes. Claim 4 A dishwasher according to paragraph 3, wherein the sealing portion is provided to be melted by heating to seal the gap between the tube and the second through hole and the gap between the closure portion and the inner circumference of the housing. Claim 5 A dishwasher according to claim 1, wherein the sealing portion is positioned to contact the surface of the closing portion facing the interior of the housing. Claim 6 A dishwasher according to claim 1, comprising: an inlet portion protruding from the housing and through which a refrigerant flows into the housing; and an outlet portion protruding from the housing and through which a refrigerant is discharged from the housing, wherein the inlet portion and the outlet portion are spaced apart from each other in the longitudinal direction of the housing. Claim 7 A dishwasher according to claim 1, comprising a refrigerant flow guide formed inside the housing and forming a refrigerant flow path, wherein the refrigerant flow guide is configured to block the flow of the refrigerant and change the direction of flow to extend the flow length of the refrigerant in the housing. Claim 8 A dishwasher according to claim 7, wherein the refrigerant flow guides are provided in a plurality spaced apart along the longitudinal direction of the housing, and adjacent refrigerant flow guides are alternately arranged in a zigzag pattern along the longitudinal direction of the housing to block a portion of the refrigerant flow path formed inside the housing. Claim 9 A dishwasher according to claim 1, comprising a fitting socket having one side connected to the housing and the diameter of the one side connected to the housing being larger than that of the other side. Claim 10 A dishwasher according to claim 9, wherein the fitting socket comprises: a first cell connected to the condenser; a second cell disposed on the other side of the first cell; and a third cell disposed between the first cell and the second cell, the diameter of which gradually decreases toward the second cell. Claim 11 A dishwasher comprising: a housing formed to form an outer shape and configured to allow washing water and refrigerant to flow separately inside; an inlet portion protruding from the housing and through which refrigerant flows into the housing; an outlet portion protruding from the housing and through which refrigerant is discharged from the housing; a plurality of tubes configured to be separated from each other and through which washing water flows, wherein the tubes are disposed at each of the two ends of the housing and close the two ends of the housing and through which the tubes pass; and a sealing portion disposed to contact the closing portion and formed of a material having a melting temperature lower than that of the closing portion. Claim 12 A dishwasher according to claim 11, wherein the closing portion and the sealing portion are formed in a disc shape, the sealing portion includes a first through hole through which the tube passes, and the closing portion includes a second through hole through which the tube passes. Claim 13 A dishwasher according to claim 12, wherein the sealing portion is provided to be melted by heating to seal the gap between the tube and the second through hole and the gap between the closure portion and the inner circumference of the housing. Claim 14 A dishwasher according to claim 11, comprising a refrigerant flow guide formed inside the housing and forming a refrigerant flow path, wherein the refrigerant flow guide is configured to block the flow of the refrigerant and change the direction of flow to extend the flow length of the refrigerant in the housing. Claim 15 A dishwasher according to claim 1, comprising: a tub for accommodating dishes; a machine room disposed below the tub; a condenser accommodating the machine room; and a compressor accommodating the machine room, communicating with the condenser, and compressing a refrigerant.

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