washing machine

Abstract

The present invention relates to a washing machine, which comprises a washing tub forming an inner space for putting in laundry to be treated, and a washing tub heat exchanger for maintaining the temperature of carbon dioxide in the washing tub constant; a distillation tub for separating contaminant substances contained in liquid carbon dioxide discharged from the washing tub; a compressor for sucking in gaseous carbon dioxide stored in the distillation tub and discharging it; a cooler for condensing and liquefying the gaseous carbon dioxide discharged from the distillation tub; and a mixer for mixing at least two or more selected from a detergent supplied to the washing tub, an additive, at least one chemical additive, and liquid carbon dioxide passed through the cooler.

Description

Technical Field

[0001] This invention relates to washing machines, and more specifically, to washing machines that utilize carbon dioxide for washing and other garment treatment. Background Technology

[0002] Typically, a carbon dioxide (CO2) washing machine, which is a waterless washing machine, is a device that converts gaseous carbon dioxide into liquid carbon dioxide by compressing and cooling it, and then uses the liquid carbon dioxide like water to wash the clothes to be washed.

[0003] In this type of washing machine that utilizes carbon dioxide, the washing tub is filled with both gaseous and liquid carbon dioxide during washing and rinsing. To utilize carbon dioxide for washing, a storage tank supplies carbon dioxide to the washing tub. When the washing cycle ends and carbon dioxide is discharged from the washing tub to the distillation tank, the storage tank recovers the carbon dioxide from the distillation tank for reuse.

[0004] At this point, the pollutants supplied from the washing tub to the distillation tank can be discharged to the outside or stored separately.

[0005] Existing washing machines that utilize carbon dioxide recover the contaminated liquid carbon dioxide after washing into a distillation tank, and then liquefy the contaminated liquid carbon dioxide using a cooler after distillation in the distillation tank, thereby obtaining pure liquid carbon dioxide, which is then stored in a storage tank or supplied to the washing tub.

[0006] According to the liquefaction method using a cooler as described above, an outdoor unit of a refrigeration unit is installed externally, and a plate heat exchanger is installed between the distillation tank and the storage tank, thereby delivering the low-temperature refrigerant generated by the refrigeration unit to the plate heat exchanger, where carbon dioxide gas flowing from the distillation tank to the storage tank is liquefied.

[0007] As mentioned above, in order to reuse carbon dioxide, compressors, refrigeration units, vacuum pumps, valves, etc. are required to operate, and these components require electricity to operate, resulting in high electricity costs.

[0008] The refrigerator consumes the most electricity, accounting for over 50% of the total power consumption. Therefore, in order to both reuse carbon dioxide and reduce the overall power consumption of the washing machine, it is necessary to reduce the power consumption of the refrigerator, which accounts for the largest share of power consumption.

[0009] Typically, washing machines that use carbon dioxide employ an automatic detergent supply system, which uses a hydraulic detergent pump to apply pressure to the detergent dispenser or nozzle, pushing it into the washing tub.

[0010] As an example, the pump's inlet side is connected to the detergent dispenser via a hose, and the pump's outlet side is connected to the washing tub via a hose.

[0011] Depending on the type of detergent, multiple pumps may also be included.

[0012] Furthermore, once the washing cycle begins, the pump starts operating, adding a predetermined amount of detergent to the washing machine.

[0013] Current detergent dispensing methods utilize hydraulic pumps to supply detergent to the washing tub, followed by vacuuming the tub and then supplying carbon dioxide from a storage tank. While this method effectively removes fat-soluble stains, it has limitations in removing water-soluble stains.

[0014] Because carbon dioxide is a non-polar solvent, it does not mix well with polar water-soluble detergents. Additives are needed to ensure thorough mixing. Even with additives, the washing process involves adding the detergent and additives to the tub first, followed by the carbon dioxide. Only clothes in the tub that have come into contact with the detergent and additives are effectively washed, while clothes not exposed to these substances experience relatively poor washing performance. Summary of the Invention

[0015] Technical problems to be solved

[0016] The purpose of this invention is to provide a washing machine that, after washing, can recover liquid carbon dioxide from inside the washing tub to a distillation tank for distillation, and liquefy gaseous carbon dioxide for reuse.

[0017] In addition, the present invention aims to provide a washing machine that mixes detergent and additives and provides them to the washing tub.

[0018] In addition, the present invention aims to provide a washing machine in which a mixture of detergent, additives and carbon dioxide is supplied to the washing tub.

[0019] means of solving technical problems

[0020] The present invention is made to achieve the above-mentioned objectives and includes: a washing tub having an internal space for receiving and processing laundry, and including a washing tub heat exchanger for maintaining a constant temperature of carbon dioxide in the washing tub; a distillation tank for separating pollutants contained in liquid carbon dioxide discharged from the washing tub; a compressor for drawing in and discharging gaseous carbon dioxide stored in the distillation tank; and a cooler for condensing and liquefying the gaseous carbon dioxide discharged from the distillation tank.

[0021] Additionally, it includes a mixer that mixes at least two of the detergent, additives, and liquid carbon dioxide from the cooler to be supplied to the washing tub.

[0022] In addition, the carbon dioxide liquefied during the cooling process can be supplied to the mixer to be mixed with the detergent and additives.

[0023] In addition, the carbon dioxide liquefied by the aforementioned cooler can be provided to the aforementioned washing tub, and the detergent and additive mixture mixed in the aforementioned mixer merges with the aforementioned liquid carbon dioxide as it flows toward the aforementioned washing tub and is then provided to the aforementioned washing tub.

[0024] In addition, the carbon dioxide liquefied by the aforementioned cooler can be supplied to the aforementioned washing tub, and the detergent and additive mixture mixed in the aforementioned mixer is supplied to the aforementioned washing tub separately from the aforementioned liquid carbon dioxide.

[0025] Additionally, it may include: a detergent dispenser connected to the mixer for storing detergent; and an additive dispenser connected to the mixer for storing additives.

[0026] Additionally, it may include: a detergent supply pipe for connecting the detergent dispenser and the mixer; a detergent valve disposed on the detergent supply pipe for controlling the flow of detergent to the mixer; an additive supply pipe for connecting the detergent dispenser and the mixer; and an additive valve disposed on the additive supply pipe for controlling the flow of additive to the mixer.

[0027] Furthermore, when the washing tub and the mixer are under vacuum, and the detergent valve and the additive valve are opened, due to the pressure difference, the detergent in the detergent box can flow to the mixer, and the additive in the additive box can flow to the mixer.

[0028] Additionally, it may include a second conduit for connecting the mixer and the washing tub, thereby transferring the mixture mixed in the mixer to the washing tub.

[0029] Additionally, it may include: a first discharge pipe for connecting the lower part of the mixer and the second pipe; a first discharge valve disposed on the first discharge pipe for controlling the flow of the mixture from the mixer to the second pipe; a second discharge pipe for connecting the upper part of the mixer and the second pipe; and a second discharge valve disposed on the second discharge pipe for controlling the flow of the mixture from the mixer to the second pipe.

[0030] Alternatively, the second discharge valve can be opened to supply the mixture located at the top of the mixer to the washing tub, and the first discharge valve can be opened to supply the mixture located at the bottom of the mixer to the washing tub.

[0031] Additionally, an agitator can be installed in the aforementioned mixer. The agitator is connected to a motor and rotates to generate forced flow, thereby mixing the detergent, additives, or carbon dioxide flowing into the mixer.

[0032] Alternatively, it may include: a first conduit that bypasses the cooler and connects to the upper part of the distillation tank and the mixer.

[0033] Furthermore, with detergent and additives supplied to the mixer, the gaseous carbon dioxide from the distillation tank can be supplied to the mixer through the first pipe.

[0034] In addition, the liquid carbon dioxide condensed in the cooler can be supplied to the mixer through a third pipe, where it is mixed with detergent and additives and then supplied to the washing machine.

[0035] In addition, the third pipe can merge with the first pipe, and the liquid carbon dioxide condensed in the cooler can be supplied to the mixer by merging with the first pipe as it flows along the third pipe.

[0036] In addition, one side of the first pipe can be connected to the upper part of the distillation tank, and the other side can penetrate the side of the mixer and bend downward inside the mixer to form a discharge section.

[0037] In addition, a carbon dioxide discharge port can be formed at the lower end of the aforementioned discharge section, and the discharge port is formed adjacent to the lower end of the aforementioned mixer.

[0038] Additionally, it may include: a third conduit that guides the liquid carbon dioxide condensed during the cooling process to the washing tub side; and a second conduit that is connected on one side to the mixer and merges with the third conduit on the other side, thereby guiding the detergent and additives mixed in the mixer to the third conduit.

[0039] Additionally, a confluence portion with a narrower inner diameter can be formed in the third pipe, and the second pipe can merge with the confluence portion.

[0040] Additionally, the aforementioned confluence portion may include: a narrowing portion, which is formed such that its inner diameter gradually decreases along the flow direction of carbon dioxide; an intermediate portion, which is connected to the narrowing portion and is formed such that the narrowed inner diameter is kept constant; and an expanding portion, which is connected to the intermediate portion and is formed such that its inner diameter gradually increases.

[0041] Additionally, it may include: a third conduit that guides the liquid carbon dioxide condensed during the passage of the aforementioned cooler to the washing tub side; and a storage tank located in the aforementioned third conduit that stores the liquid carbon dioxide before supplying it to the aforementioned washing tub.

[0042] Additionally, it may include a second conduit, one side of which is connected to the mixer and the other side to the washing tub, to guide the detergent and additives mixed in the washing tub into the washing tub.

[0043] Invention Effects

[0044] According to the washing machine of the present invention configured as described above, the contaminated liquid carbon dioxide remaining in the washing tub after washing the clothes is recycled in the carbon dioxide washing machine and then reused through distillation and condensation, thereby having the advantage of reducing the cost of using carbon dioxide.

[0045] In addition, according to the present invention, it has the advantage of using a mixer to mix detergent and additives and then supplying them to the washing tub.

[0046] In addition, according to the present invention, it has the advantage of using a mixer to mix detergent, additives and carbon dioxide and then supplying them to the washing tub.

[0047] Furthermore, according to the present invention, a washing machine utilizing carbon dioxide can remove not only grease-soluble contaminants but also water-soluble contaminants, thereby having the advantage of achieving differentiated washing performance compared to existing washing machines that primarily remove grease-soluble contaminants.

[0048] In addition, according to the present invention, there is no need to use a hydraulic pump for delivering detergent and additives to the mixer and washing tub. Detergent and additives are provided due to pressure differences in the mixer and washing tub under vacuum conditions, which also has the advantage of reducing component prices and pump maintenance costs.

[0049] In addition, it has the advantage of being able to supply gaseous carbon dioxide to the washing tub as needed, and also being able to supply liquid carbon dioxide to the washing tub.

[0050] In addition, it has the advantage of providing carbon dioxide from the gas discharged from the compressor to the washing tub, thereby increasing the temperature of the washing tub as needed.

[0051] In addition, it has the advantage of using the carbon dioxide emitted from the compressor as a heat source when distilling liquid carbon dioxide in the distillation tank. Attached Figure Description

[0052] Figure 1 This is a schematic diagram of the basic structure and cycle of a washing machine according to an embodiment of the present invention.

[0053] Figure 2 This is a schematic diagram of an example of the main structure of the present invention, namely the mixer.

[0054] Figure 3 This is another schematic diagram of the main structure of the present invention, namely the mixer.

[0055] Figure 4 This is a basic structure and cycle diagram of a washing machine according to a second embodiment of the present invention.

[0056] Figure 5 yes Figure 4 A detailed schematic diagram of the confluence structure is shown.

[0057] Figure 6 This is a basic structure and cycle diagram of a washing machine according to a third embodiment of the present invention. Detailed Implementation

[0058] The following description is for illustrative purposes only. Therefore, those skilled in the art will be able to implement various devices that, while not explicitly described or illustrated in this specification, achieve the principles of the invention and are included within the concept and scope of the invention. Furthermore, in principle, all conditional terms and embodiments listed in this specification are intended only to aid in understanding the concept of the invention and should not be construed as limiting the invention to these specifically listed embodiments and states.

[0059] Furthermore, it should be understood that the principles, viewpoints, and embodiments of the present invention, as well as all detailed descriptions exemplifying specific embodiments, are intended to include structural and functional equivalents of the foregoing. Additionally, it should be understood that these equivalents include not only currently known equivalents but also those developed in the future, i.e., all elements designed to perform the same function, regardless of their structure.

[0060] In the claims of this specification, the constituent components described in terms of means for implementing the functions described in the specific embodiments are intended to include all methods capable of implementing those functions, such as combinations of circuit elements or various forms of software such as firmware / microcode, and are combined with adapter circuitry for executing the software to perform the functions. The invention as defined by these claims is constructed by combining the functions provided by various enumerated means in the manner claimed in the claims; therefore, all means capable of providing the above functions should be considered equivalent to what is disclosed in this specification.

[0061] The above-mentioned objects, features, and advantages will become clearer through the accompanying drawings and related detailed descriptions, thereby enabling those skilled in the art to readily implement the technical concept of the present invention. Furthermore, in describing the present invention, detailed descriptions of prior art related to the present invention are omitted where it is determined that such detailed descriptions might unnecessarily obscure the spirit of the present invention.

[0062] In the following description, the suffixes “module” and “section” used for the constituent elements are added only for the purpose of writing this specification, and the above “module” and “section” can be used interchangeably.

[0063] Hereinafter, washing machines according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0064] Figure 1 This is a schematic diagram of the basic structure and cycle of a washing machine according to an embodiment of the present invention. Furthermore, Figure 2 This is a schematic diagram of an example of the main structure of the present invention, namely the mixer. Furthermore, Figure 3 This is another schematic diagram of the main structure of the present invention, namely the mixer.

[0065] Reference Figures 1 to 3 The washing machine of the present invention utilizes carbon dioxide to wash, rinse and process various clothes, quilts and other items waiting to be washed, so it may include constituent elements capable of storing or processing carbon dioxide.

[0066] Specifically, a washing machine can be divided into a carbon dioxide supply section, a washing section for handling laundry, and a regeneration section for handling used carbon dioxide.

[0067] The supply unit may include at least one storage tank for storing liquid carbon dioxide.

[0068] The storage tank may include a storage tank, a distillation tank 120, and a replenishment tank (not shown). In this invention, these are equivalent to either the storage tank or the distillation tank 120.

[0069] The washing unit may include a washing tub 110, into which carbon dioxide, at least one chemical additive, detergent and the clothes to be washed are put together.

[0070] In the following description, detergent and additives may refer to chemical additives.

[0071] Furthermore, the regeneration unit may include a pollutant separation device (not shown) for separating pollutants dissolved in liquid carbon dioxide after washing, a cooler 140 for changing gaseous carbon dioxide into liquid, a distillation tank 120 for separating pollutants contained in liquid carbon dioxide, and a pollutant separator 150 for storing and separating pollutants separated after distillation in the distillation tank 120.

[0072] The distillation tank 120 described above can be used as both a supply unit and a regeneration unit.

[0073] If there is no storage tank for storing purified liquid carbon dioxide, then the distillation tank 120 is used as both a supply unit and a regeneration unit.

[0074] Conversely, if a separate storage tank is provided, the storage tank is used as a supply unit, and the distillation tank 120 is used only as a regeneration unit.

[0075] The replenishment tank in the supply section can store carbon dioxide supplied to the washing tub 110. Of course, the replenishment tank is a storage tank that can be used when carbon dioxide replenishment is needed; it may not be necessary when carbon dioxide replenishment is not required. Alternatively, the replenishment tank may not be present under normal circumstances, but may be integrated with the washing machine as needed to replenish carbon dioxide; after replenishment is complete, the replenishment tank is detached from the washing machine.

[0076] In an embodiment of the present invention, the carbon dioxide supplied to the washing tub 110 can be recovered and reused, so there is no need for a replenishment tank, and therefore it is natural that there is no replenishment tank.

[0077] The accompanying drawings briefly show the reference numerals, omitting several valves, control units, and parts of the connecting flow channels. Solid lines represent the flow channels for carbon dioxide movement, and arrows indicate the direction of carbon dioxide movement.

[0078] Referring to the accompanying diagram, a washing machine that uses carbon dioxide to treat the clothes to be washed is described.

[0079] According to an embodiment of the present invention, the washing machine can perform at least one of the following washing operations on the laundry to be washed, namely washing, rinsing, dehydrating and drying, to remove contaminants from the laundry to be washed, by circulating carbon dioxide instead of water, to perform the laundry to be washed operation.

[0080] The washing machine according to an embodiment of the present invention includes a washing tub 110, a distillation tank 120, a compressor 130, and a cooler 140.

[0081] The washing tub 110 of the washing machine can use carbon dioxide to process the laundry items contained therein.

[0082] The washing tub 110 may include a sensor for measuring the amount of liquid carbon dioxide stored inside the washing tub 110. When it is confirmed that liquid carbon dioxide has been supplied to the washing tub 110 at a level exceeding a reference value, the sensor can stop the supply of carbon dioxide via a control unit (not shown). Specifically, the reference value for measuring the amount of liquid carbon dioxide can be determined based on the amount of laundry to be washed by the washing machine and can be proportional to the amount of laundry.

[0083] Additionally, the washing tub 110 may include a washing tub heat exchanger 111 for maintaining a constant temperature of carbon dioxide within the washing tub 110. The washing tub heat exchanger 111 supplies heat to the washing tub 110, thereby preventing a sharp drop in temperature that could cause the laundry to harden or become damaged when liquid or gaseous carbon dioxide is discharged from the washing tub 110.

[0084] To maximize the contact area with the carbon dioxide contained in the washing tub 110, the washing tub heat exchanger 111 can be configured as a serrated shape with multiple bends in the tube. The washing tub heat exchanger 111 can be supplied with high-temperature, high-pressure carbon dioxide gas supplied from the distillation tank 120 and discharged by the compressor 130.

[0085] The washing tub 110 may include a pressure sensor for monitoring the internal pressure of the washing tub 110. In order to provide a solution in the case where the internal pressure of the washing tub 110 is a vacuum and the door (not shown) cannot be opened, the washing tub 110 is provided with an air supply hole (not shown) so that outside air can flow into the washing tub 110 and the door of the washing tub 110 can be opened.

[0086] The laundry tub 110 (not shown) has a door on one side, and the entrance can be opened or closed. By opening the entrance through the door, the user can put clothes to be washed into the laundry tub 110 or take out clothes that have finished washing.

[0087] The air supply port (not shown) is a one-way valve, which can be a check valve that allows gas to flow in only one direction. With the door of the washing tub 110 closed in a vacuum state, opening the air supply port (not shown) allows outside air to flow into the washing tub 110. When the pressure inside the washing tub 110 becomes the same as atmospheric pressure, the door of the washing tub 110 can be easily opened.

[0088] In order to separate impurities from the carbon dioxide used in the washing and rinsing steps, i.e., the carbon dioxide used at the end of the washing tub 110, before using the carbon dioxide again, the distillation tank 120 can perform distillation.

[0089] The distillation tank 120 can utilize the heat energy generated by the compressor 130 to vaporize liquid carbon dioxide, thereby separating carbon dioxide and pollutants. At this time, the vaporized gaseous carbon dioxide is located in the upper part of the distillation tank 120, while the pollutants, contained in the sludge generated during the washing process, are located in the lower part of the distillation tank 120.

[0090] The pollutants remaining in the lower part of the distillation tank 120 are temporarily stored after moving to the pollutant separator 150, which is used to store and separate the pollutants.

[0091] Furthermore, when pollutants are separated in the pollutant separator 150, additives are left behind. These additives are temporarily stored after moving to the additive regenerator 160.

[0092] Furthermore, the additives that have been regenerated in the additive regenerator 160 are stored after being moved to the detergent and the additive box 170.

[0093] The detergent and additive box 170 mentioned above includes a detergent box 171 and an additive box 172.

[0094] Furthermore, the additives that have been regenerated in the additive regenerator 160 can be moved to the additive box 172 and stored.

[0095] Furthermore, the detergent and additives stored in the detergent and additive box 170 can move to the mixer 180 and mix with liquefied carbon dioxide while passing through the cooler 140 before being supplied to the washing tub 110.

[0096] The characteristics of the above-mentioned detergent and additives being supplied to the mixer 180 and the characteristics of mixing the detergent, additives and liquid carbon dioxide are described in detail below.

[0097] In addition, the pollutants remaining in the lower part of the distillation tank 120 can be temporarily stored after being moved to the pollutant separator 150 for storing and separating pollutants.

[0098] Furthermore, when pollutants are separated in the pollutant separator 150, detergent remains and is temporarily stored after moving to the detergent regeneration tank.

[0099] Furthermore, the detergent that has been regenerated in the detergent regeneration tank can be temporarily stored after being moved to the detergent and additive box 170.

[0100] The detergent and additive box 170 mentioned above includes a detergent box 171 and an additive box 172.

[0101] Furthermore, the detergent that has been regenerated in the detergent regeneration tank can be moved to the detergent box 171 and stored.

[0102] Furthermore, the detergent and additives stored in the detergent and additive box 170 can move to the mixer 180 and be mixed with liquefied carbon dioxide in the cooler 140 before being supplied to the washing tub 110.

[0103] The characteristics of the above-mentioned detergent and additives being supplied to the mixer 180 and the characteristics of mixing the detergent, additives and liquid carbon dioxide are described in detail below.

[0104] On the other hand, the distillation tank 120 is a storage tank for storing carbon dioxide discharged from the washing tank 110.

[0105] The liquid carbon dioxide discharged from the washing tub 110 can flow to the distillation tank 120 through the recovery pipe 201.

[0106] The aforementioned recovery pipe 201 can be connected to the lower end of the aforementioned washing tub 110 and the upper part of the aforementioned distillation tank 120.

[0107] In addition, a separate recovery valve 202 may be provided in the recovery pipe 201 to control the flow of fluid flowing in the recovery pipe 201.

[0108] Therefore, if the recovery valve 202 is opened, the liquid carbon dioxide in the washing tub 110 flows along the recovery pipe 201 to the distillation tank 120, and can then be stored in the distillation tank 120.

[0109] Additionally, the system may include a compressor 130 located outside the distillation tank 120 that draws in and compresses gaseous carbon dioxide from the distillation tank 120, and a distillation tank heat exchanger 121 located inside the distillation tank 120 and connected to the compressor 130 for heat exchange between the compressed gaseous carbon dioxide and the liquid carbon dioxide stored inside the tank. Preferably, the distillation tank heat exchanger 121 is located at the lower part of the distillation tank 120 to facilitate heat exchange with the liquid carbon dioxide inside the distillation tank 120.

[0110] Additionally, the distillation tank 120 may include a cooler 140 for condensing and liquefying the distilled carbon dioxide.

[0111] Preferably, the distillation tank 120 is located at a lower position than the washing tub 110 so that the liquid carbon dioxide inside the washing tub 110 can be received by gravity.

[0112] The compressor 130 can draw in and compress gaseous carbon dioxide stored inside the distillation tank 120 at the inlet side, and discharge the compressed gaseous carbon dioxide at the outlet side.

[0113] In detail, the gaseous carbon dioxide stored inside the distillation tank 120 flows to the compressor 130 through the first gas pipe 203 connected to the upper end of the distillation tank 120.

[0114] Furthermore, the gaseous carbon dioxide discharged from the compressor 130 can be transformed into a high-temperature and high-pressure state through the compression action of the compressor 130.

[0115] Gaseous carbon dioxide discharged from compressor 130 can be supplied to the distillation tank 120 side via washing tank heat exchanger 111.

[0116] In detail, the carbon dioxide gas passing through the washing tub heat exchanger 111 flows to the distillation tank heat exchanger 121 through the second gas pipe 204.

[0117] In addition, the gaseous carbon dioxide discharged from the compressor 130 can be supplied directly to the distillation tank 120 side through other bypass channels instead of the washing tub heat exchanger 111.

[0118] In addition, the gaseous carbon dioxide discharged from the compressor 130 can be transferred to the cooler 140 through the distillation tank heat exchanger 121.

[0119] The inlet of the distillation tank heat exchanger 121 of the distillation tank 120 can be connected to the outlet side of the compressor 130, and the outlet side of the distillation tank heat exchanger 121 of the distillation tank 120 can be connected to the inlet of the cooler 140.

[0120] Cooler 140 may be a condenser for condensing and liquefying gaseous carbon dioxide discharged from compressor 130 and supplied to distillation tank 120 after passing through washing tank 110.

[0121] Cooler 140 can condense high-temperature and high-pressure gaseous carbon dioxide and convert it into liquid carbon dioxide before supplying it to the washing tub 110 side.

[0122] The liquid carbon dioxide from the cooler 140 can be directly supplied to the washing tub 110.

[0123] In addition, the liquid carbon dioxide from the cooler 140 can be supplied to the mixer 180, which is located in the flow channel connecting the washing tub 110 and the cooler 140, and then mixed with detergent and additives in the mixer 180 before being supplied to the washing tub 110.

[0124] On the other hand, heat may be generated during the condensation of gaseous carbon dioxide in the cooler 140. When the washing or rinsing action in the processing of the items to be washed is completed, the heat generated in the cooler 140 is supplied as the heat energy of the distillation process of liquid carbon dioxide and pollutants inside the distillation tank 120 through the distillation tank heat exchanger 121 included in the distillation tank 120.

[0125] On the other hand, the aforementioned cooler 140 can use nighttime electricity to generate cool air.

[0126] Furthermore, the cold air generated by the aforementioned cooler 140 can be stored in a separate cold storage tank.

[0127] Furthermore, the gaseous carbon dioxide discharged from the compressor 130 and passing through the distillation tank 120 undergoes heat exchange when passing through the cold storage tank, thereby being condensed and liquefied.

[0128] On the other hand, the gaseous carbon dioxide used for the washing process is discharged from the washing tub 110 by the suction pressure of the compressor 130, and can be recycled and stored in the distillation tank 120.

[0129] In addition, due to gravity, the liquid carbon dioxide used to process the clothes to be washed in the washing tub 110 can be recovered and stored in the distillation tank 120.

[0130] In addition, the liquid carbon dioxide used in the washing tub 110 to process the laundry can be recovered and stored in the distillation tank 120 by using other pumps.

[0131] On the other hand, most of the gaseous carbon dioxide discharged from the washing tub 110 by the suction pressure of the compressor 130 is discharged from the inside of the washing tub 110. As a result, the inside of the washing tub 110 becomes a vacuum state below atmospheric pressure.

[0132] In addition, the aforementioned washing tub 110 can be connected to the vacuum pump 270 via a separate vacuum pipe 260.

[0133] The aforementioned vacuum pipe 260 can be connected to various locations of the aforementioned washing tub 110.

[0134] The vacuum pipe 260 may be equipped with a vacuum valve 261 for controlling the flow of air from the washing tub 110 to the vacuum pump 270.

[0135] When the vacuum valve 261 is opened and the vacuum pump 270 is activated, the air inside the washing tub 110 is forcibly expelled, and the inside of the washing tub 110 can become a vacuum state below atmospheric pressure.

[0136] The pressure inside the washing tub 110 decreases while the compression ratio of the compressor 130 increases, so the gaseous carbon dioxide is discharged to a level that will not affect reliability, in order to avoid reliability problems of the compressor 130, and the operation of the compressor 130 is stopped.

[0137] At this time, when all the carbon dioxide inside the washing tub 110 is expelled and the pressure inside the washing tub 110 becomes a vacuum, external air flows in through the air supply hole (not shown), thereby opening the door of the washing tub 110.

[0138] A mixer 180 is provided in the connecting channel between the cooler 140 and the washing tub 110 to mix carbon dioxide, detergent and washing additives.

[0139] In this invention, the above-mentioned detergent additive can be understood as having the same structure as the additive.

[0140] The carbon dioxide from the cooler 140, the detergent supplied from the detergent container 171, and the detergent additive supplied from the additive container 172 can be added into the mixer 180 for mixing.

[0141] In a typical washing machine, water is used as the washing solvent. Similarly, liquid and gaseous carbon dioxide can also be used. It should be noted that the washing power decreases when using carbon dioxide to remove water-soluble substances; therefore, detergents or surfactants used to remove these substances are further employed.

[0142] Before performing the washing process, the washing tub 110 and the mixer 180 create a vacuum inside each of their constituent elements.

[0143] During the process of handling the items to be washed, in order to perform the washing action, the control unit supplies gaseous and liquid carbon dioxide to the washing tub 110 by control.

[0144] As an example, the control unit controls the supply of liquid carbon dioxide stored inside the distillation tank 120, which functions as a carbon dioxide storage tank, from the distillation tank 120 to the washing tank 110 according to the user's control.

[0145] In addition, the control unit controls the process so that gaseous carbon dioxide from the distillation tank 120 is liquefied in the cooler 140 by the suction pressure of the compressor 130, and the liquefied liquid carbon dioxide is supplied to the mixer 180.

[0146] Furthermore, the control unit controls the mixing of carbon dioxide, detergent, and detergent additives in the mixer 180 before supplying them to the washing tub 110.

[0147] Carbon dioxide, detergent, and additives stored in mixer 180 can be supplied to washing tub 110 via connecting channels.

[0148] The washing tub 110 of the washing machine, which receives and contains liquid and gaseous carbon dioxide supplied from the distillation tank 120 under the control of the control unit, can perform at least one of the following washing operations to remove contaminants from the laundry: washing, rinsing, dehydration, and drying.

[0149] By utilizing the friction between the laundry items to be washed, which are contained in the washing tub 110 for washing or rinsing in the washing machine, and carbon dioxide, a washing cycle can be performed to separate pollutants from the laundry items.

[0150] The washing cycle refers to a series of processes performed by the washing machine when the user selects a program to wash the clothes. The washing cycle may include a pressurization step and a supply step of supplying liquid and gaseous carbon dioxide from the distillation tank 120 to the washing tub 110; a washing step in which the washing tub 110 is rotated at a predetermined speed to separate contaminants from the clothes by utilizing the friction between carbon dioxide and the clothes to be washed; and a rinsing step in which the washing tub 110 is rotated at a predetermined speed to separate contaminants from the clothes by utilizing the friction between carbon dioxide and the clothes to be washed.

[0151] A distillation step may be included after the washing and rinsing steps described above. As mentioned above, distillation refers to heating liquid carbon dioxide mixed with pollutants using the heat exchanger 121 of the distillation tank 120, and then vaporizing (or evaporating) the carbon dioxide and cooling it again to separate pure liquid carbon dioxide.

[0152] The separated liquid carbon dioxide can be stored in distillation tank 120 and reused in subsequent steps.

[0153] In this way, the washing tub 110 uses liquid and gaseous carbon dioxide to wash or rinse the clothes to be washed. After the washing or rinsing is completed, the liquid carbon dioxide and the pollutants generated during the washing or rinsing process can be discharged into the distillation tank 120.

[0154] At this point, the vaporized carbon dioxide is located in the upper part of the distillation tank 120, while the pollutants are located in the lower part. The pollutants remaining in the lower part of the distillation tank 120 are temporarily stored after moving to the pollutant separator 150, which is used to store and separate the pollutants.

[0155] On the other hand, according to embodiments of the present invention, a scheme for recovering carbon dioxide from the washing tub 110 is provided so that the carbon dioxide remaining in the washing tub 110 after washing can be recovered and reused.

[0156] The process of recovering carbon dioxide remaining inside the washing tub 110 of the washing machine after the washing process is completed is explained.

[0157] The liquid and gaseous carbon dioxide remaining in the washing tub 110 are recovered and reused in the distillation tank 120, instead of being discharged to the outside through the exhaust pipe.

[0158] First, most of the liquid carbon dioxide that has been processed in the washing tub 110 can be recovered by gravity and stored in the distillation tank 120.

[0159] As an example, when the recovery valve 202 is opened, the liquid carbon dioxide in the washing tub 110 flows along the recovery pipe 201 to the distillation tank 120, and can then be stored in the distillation tank 120.

[0160] Additionally, due to the suction pressure of the compressor 130, the gaseous carbon dioxide used for the processing of clothes to be washed in the washing tub 110 is discharged from the washing tub 110, and the gaseous carbon dioxide discharged from the washing tub 110 is supplied to the cooler 140.

[0161] The gaseous carbon dioxide supplied to the cooler 140 is condensed and liquefied in the cooler 140, changing into liquid carbon dioxide. The liquid carbon dioxide liquefied in the cooler 140 can then be recovered and stored in the distillation tank 120.

[0162] Conversely, the gaseous carbon dioxide supplied to the cooler 140 is condensed and liquefied in the cooler 140, changing into liquid carbon dioxide. The liquid carbon dioxide liquefied in the cooler 140 can then be stored in the mixer 180.

[0163] Conversely, the gaseous carbon dioxide supplied to the cooler 140 is condensed and liquefied in the cooler 140, changing into liquid carbon dioxide. The liquid carbon dioxide liquefied in the cooler 140 can then be supplied to the washing tub 110 via the mixer 180.

[0164] At this time, most of the gaseous carbon dioxide is discharged from the washing tub 110 by the suction pressure of the compressor 130, so that it can become a vacuum state below atmospheric pressure.

[0165] Furthermore, in the aforementioned washing tub 110, when the aforementioned vacuum valve 261 is opened and the aforementioned vacuum pump 270 is activated, the air inside the washing tub 110 is forcibly discharged through the vacuum pipe 260 by the suction pressure of the aforementioned vacuum pump 270, and the interior of the aforementioned washing tub 110 can become a vacuum state lower than atmospheric pressure.

[0166] When the pressure inside the washing tub 110 becomes a vacuum state below atmospheric pressure, the compression ratio of the compressor 130 increases, which may lead to reliability issues with the compressor 130. When a reliability problem occurs with the compressor 130, the compressor 130 is damaged or its function deteriorates, thus preventing it from performing its normal function as a compressor 130.

[0167] Therefore, before the compressor 130 experiences reliability issues, gaseous carbon dioxide is discharged, and the operation of the compressor 130 is stopped.

[0168] Furthermore, due to the heat from the washing tub heat exchanger 111, the pressure of a portion of the gaseous carbon dioxide remaining in the washing tub 110 increases. Therefore, due to the pressure difference, it can be recovered from the washing tub 110 and stored in the distillation tank 120.

[0169] Furthermore, due to the heat from the washing tub heat exchanger 111, the pressure of some of the gaseous carbon dioxide remaining in the washing tub 110 increases, so due to the pressure difference, it can also flow from the washing tub 110 to the cooler 140.

[0170] As described above, when the carbon dioxide in the washing tub 110 is recovered to the distillation tank 120 or the cooler 140, the inside of the washing tub 110 is in a vacuum state or a state below atmospheric pressure, making it impossible to open the door of the washing tub 110. Therefore, external air can be supplied to the washing tub 110 through an air supply port (not shown) to open the door of the washing tub 110 and remove the clothes to be washed.

[0171] By supplying external air into the washing tub 110, the inside and outside of the washing tub 110 are in a state of pressure equilibrium, which makes it easy to open the door of the washing tub 110 and take out the clothes to be washed.

[0172] In this way, the carbon dioxide remaining in the washing tub 110 after washing the clothes is recovered into the distillation tank 120 for reuse instead of being discharged to the outside. This eliminates the need for an exhaust chimney structure for discharging carbon dioxide, reducing the weight and size of the washing machine and lowering the cost of using carbon dioxide.

[0173] When describing other embodiments of the washing machine according to the present invention, the same reference numerals are used for configurations that are the same as those in one embodiment of the present invention and configurations that have the same function, and detailed descriptions of these configurations are omitted to avoid repetition.

[0174] According to another embodiment of the present invention, the washing machine performs at least one of the following washing operations on the laundry to be washed, namely washing, rinsing, dehydrating and drying, for removing contaminants from the laundry to be washed, and then terminates the operation by the control unit.

[0175] After the washing process is completed, the liquid carbon dioxide and pollutants inside the distillation tank 120 are vaporized into carbon dioxide through a distillation process, thereby separating the pollutants.

[0176] At this point, the vaporized gaseous carbon dioxide is located in the upper part of the distillation tank 120, while the pollutants and liquid carbon dioxide are located in the lower part of the distillation tank 120.

[0177] Pollutants contained in liquid carbon dioxide are separated in the distillation tank 120, and the separated pollutants are temporarily stored after moving to the pollutant separator 150.

[0178] Furthermore, when pollutants are separated in the pollutant separator 150, additives are left behind. These additives are temporarily stored after moving to the additive regenerator 160.

[0179] Furthermore, the additives that have been regenerated in the additive regenerator 160 are stored after being moved to the detergent and the additive box 170.

[0180] Furthermore, the detergent and additives stored in the detergent and additive box 170 can move to the mixer 180 and be mixed with the carbon dioxide liquefied during the cooling process 140 before being supplied to the washing tub 110.

[0181] In addition, the pollutants remaining in the lower part of the distillation tank 120 are temporarily stored after moving to the pollutant separator 150, which is used to store and separate pollutants.

[0182] Furthermore, after the pollutants are separated in the pollutant separator 150, the detergent is left behind and is temporarily stored after moving to the detergent regeneration tank.

[0183] Furthermore, the detergent that has been regenerated in the detergent regeneration tank can be stored after being moved to the detergent and additive box 170.

[0184] Furthermore, the detergent and additives stored in the detergent and additive box 170 can move to the mixer 180 and be mixed with the carbon dioxide liquefied during the cooling process 140 before being supplied to the washing tub 110.

[0185] The process of supplying carbon dioxide to the washing tub 110 is the same as that in the above embodiment, so detailed description of this is omitted and the carbon dioxide recovery process will be described.

[0186] The washing tub 110 of the washing machine, which receives and contains liquid and gaseous carbon dioxide supplied from the distillation tank 120 via the control unit, can perform washing, rinsing, dehydration, and drying processes on the clothes to be washed to remove contaminants.

[0187] In order to perform washing or rinsing actions in the washing machine, the washing tub 110 uses liquid and gaseous carbon dioxide to wash or rinse the clothes to be washed. After the washing or rinsing action is completed, the liquid carbon dioxide and the pollutants generated during the washing or rinsing of the clothes to be washed can be discharged into the distillation tank 120.

[0188] Distillation tank 120 can separate liquid carbon dioxide and pollutants through a distillation process. In this case, distillation tank 120 can utilize the heat energy generated by the operation of compressor 130 to separate carbon dioxide and pollutants.

[0189] That is, the carbon dioxide supplied to the distillation tank 120 can supply heat energy to the liquid carbon dioxide and pollutants inside the distillation tank 120 through the distillation tank heat exchanger 121 included in the distillation tank 120. The liquid carbon dioxide and pollutants inside the distillation tank 120 can be distilled by the received heat energy.

[0190] During distillation, liquid carbon dioxide is vaporized and can remain in a gaseous state at the top of the distillation tank 120. Meanwhile, pollutants can remain at the bottom of the distillation tank 120.

[0191] The pollutants separated by distillation in the distillation tank 120 are moved to the pollutant separator 150 and stored.

[0192] Furthermore, when pollutants are separated in the pollutant separator 150, additives are left behind. These additives are temporarily stored after moving to the additive regenerator 160.

[0193] Furthermore, the additives that have been regenerated in the additive regenerator 160 are stored after being moved to the detergent and the additive box 170.

[0194] Furthermore, the detergent and additives stored in the detergent and additive box 170 can move to the mixer 180 and be mixed with the carbon dioxide liquefied during the cooling process 140 before being supplied to the washing tub 110.

[0195] In addition, the pollutants remaining in the lower part of the distillation tank 120 are temporarily stored in the pollutant separator 150, which is used to store and separate pollutants.

[0196] Furthermore, after the pollutants are separated in the pollutant separator 150, the detergent is left behind and is temporarily stored after moving to the detergent regeneration tank.

[0197] Furthermore, the detergent that has been regenerated in the detergent regeneration tank is stored after it moves to the detergent and additive box 170.

[0198] Furthermore, the detergent and additives stored in the detergent and additive box 170 move to the mixer 180 and are mixed with the carbon dioxide that has been liquefied during the cooling process 140 before being supplied to the washing tub 110.

[0199] In embodiments of the present invention, the control unit can control the washing tub 110, compressor 130, cooler 140, various valves, and components. The control unit can control the constituent elements included in the washing machine based on user command signals input via a control panel (not shown) included in the washing machine, and may include a memory and at least one processor. That is, the control panel may include at least one input means for receiving user operations corresponding to predetermined requests or commands related to the actions of the washing machine (at least one of washing, rinsing, spin-drying, and drying of the laundry).

[0200] The processor included in the control unit can provide the functions according to embodiments of the present invention. For example, the processor executes a program stored in the memory included in the control unit, thereby enabling overall control of the constituent elements included in the washing machine.

[0201] In embodiments of the present invention, the processor may be implemented by at least a portion of a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), and an AP (Application Processor), but the types of processors according to the present invention are not limited to these.

[0202] The control unit can control the rotation of the washing tub 110 according to the processing action of the clothes to be washed by controlling the operation of the motor (not shown) included in the washing machine.

[0203] The control unit can control the operation of the compressor 130 and the cooler 140 included in the washing machine. In an embodiment of the present invention, the processor starts the compressor 130 and the cooler 140 to depressurize the inside of the storage tank according to the operating mode of the washing machine. When the pressure inside the storage tank reaches a safe range, the operation of the compressor 130 and the cooler 140 can be stopped.

[0204] On the other hand, the aforementioned cooler 140 can generate cool air using electricity at night.

[0205] Furthermore, the cold air generated by the aforementioned cooler 140 can be stored in a separate cold storage tank.

[0206] Furthermore, the gaseous carbon dioxide discharged from the compressor 130 and passing through the distillation tank 120 undergoes heat exchange while passing through the cold storage tank, thereby being condensed and liquefied.

[0207] On the other hand, when the present invention uses carbon dioxide for washing, carbon dioxide (CO2) is non-polar in terms of solvent properties, which limits its ability to wash water-soluble stains. To overcome this limitation, it is necessary to use detergents that can remove water-soluble stains. However, water-soluble detergents and carbon dioxide are not easily mixed, so a washing additive is needed to make the two mix thoroughly.

[0208] In other words, washing machines that use carbon dioxide as a solvent are good at removing fat-soluble stains, but relatively difficult to remove water-soluble stains. To remove water-soluble stains, detergents are needed, but water-soluble detergents are difficult to mix with carbon dioxide as a solvent. Therefore, even when detergent is added to the washing tub, water-soluble stains are difficult to remove, except for the portion of the clothing that comes into contact with the detergent. This invention provides a detergent dispensing structure in a carbon dioxide-based washing machine that can wash water-soluble stains.

[0209] Refer again Figures 1 to 3 The present invention is a washing machine that uses carbon dioxide as a solvent. In order to remove not only fat-soluble pollutants but also water-soluble pollutants, detergent and additives can be supplied from detergent box 171 and additive box 172 respectively, and carbon dioxide can be supplied from distillation tank 120. It is not necessary to add it separately to washing tub 110. It is fully mixed before being added to washing tub 110.

[0210] Furthermore, in order to fully mix the detergent, detergent additives, and carbon dioxide before supplying them to the washing tub, a mixer 180 is included to mix the detergent, detergent additives, and liquid carbon dioxide.

[0211] Liquid carbon dioxide from the distillation tank 120 and cooler 140 is supplied to mixer 180, and detergent and additives from detergent and additive box 170 are also supplied to mixer 180 for mixing.

[0212] Similar to the distillation tank 120 described above, the mixer 180 can be configured as a pressure vessel.

[0213] Furthermore, detergent and detergent additives need to be supplied to the mixer 170 first, and then gaseous carbon dioxide in the distillation tank 120 is supplied to the mixer 180 and adjusted to a certain pressure to prevent the detergent in the mixer 180 from freezing. After that, liquid carbon dioxide is supplied to the mixer 180.

[0214] For this purpose, a first pipe 210 may also be included to connect the distillation tank 120 and the mixer 180.

[0215] The first pipe 210 is connected to the upper part of the distillation tank 120, thereby supplying the gaseous carbon dioxide from the distillation tank 120 to the upper side of the mixer 180.

[0216] The first pipe 210 can bypass the cooler 140 and be connected to the mixer 180.

[0217] In addition, the mixture in the mixer 180, that is, the mixture of carbon dioxide, detergent and additives, can be supplied to the washing tub 110 through the second pipe 220.

[0218] Furthermore, the flow of the mixed liquid supplied from the mixer 180 to the washing tub 110 can be regulated by switching on or off the upper or lower valve provided in the mixer 180.

[0219] In addition, the mixer 180, which is designed to mix detergent, detergent additives and carbon dioxide, is kept at a certain pressure and temperature to prevent the water-soluble detergent from freezing. Therefore, gaseous carbon dioxide is received from the distillation tank 120 to prevent the water-soluble detergent in the mixer 180 from freezing. The mixture of detergent, additives and carbon dioxide (hereinafter referred to as "mixture") mixed in the mixer 180 is then supplied to the washing tub 110.

[0220] In addition, it has the following structure: when the mixture is delivered from the mixer 180 to the washing tub 110, flow channels are formed in the upper and lower parts of the mixer 180 respectively, and these flow channels are opened or closed individually or simultaneously, so that the mixture moves to the washing tub 110.

[0221] Alternatively, the present invention can have a structure with two storage tanks, a washing tank 110 and a distillation tank 120, or a structure with three storage tanks, a washing tank 110, a distillation tank 120, and a storage tank 190. Furthermore, the present invention can also have a structure with four or more storage tanks, including a washing tank 110, a distillation tank 120, a storage tank 190, and a replenishment tank.

[0222] The present invention comprises a washing tub 110, a distillation tank 120, a compressor 130, a cooler 140, a contaminant separator 150, an additive regenerator 160, a detergent box 171, an additive box 172, a mixer 180, and a plurality of valves capable of opening or closing the pipes (channels) connecting each component.

[0223] In a washing machine having two storage tanks, a washing tub 110 and a distillation tank 120, after the Nth wash in the washing tub 110, the contaminated carbon dioxide solvent is transferred to the distillation tank 120 for storage. Then, during the N+1th wash, pure carbon dioxide and contaminants are separated from the distillation tank 120. The pure carbon dioxide is discharged in gaseous form and, after being condensed by the cooler 140, is supplied back to the washing tub 110. Conversely, the contaminants remaining in the distillation tank 120 are transferred to the contaminant separator 150 and discharged to the outside. In this invention, to effectively remove water-soluble contaminants, a water-soluble contaminant removal detergent and a detergent additive that helps mix the detergent with carbon dioxide are used. After the pure carbon dioxide is separated in the distillation tank 120, the remaining contaminants and detergent additives are discharged in the additive regenerator 160. The detergent additives are regenerated and stored in the additive box 172.

[0224] Additionally, a detergent box 171 is arranged adjacent to the additive box 172, and each of them is individually connected to the mixer 180. The mixer 182 is a component that uniformly mixes the detergent, detergent additives, and carbon dioxide. When carbon dioxide, which serves as a solvent, is supplied from the distillation tank 120, the detergent, detergent additives, and carbon dioxide are mixed and then supplied to the washing tub 110. The mixer 180 is designed to contain carbon dioxide, so a high-pressure container is required.

[0225] At this point, the carbon dioxide supplied from the distillation tank 120 is condensed as it passes through the cooler 140, and then supplied to the mixer 180 through the third pipe 230.

[0226] Furthermore, the third pipe 230 can merge with the aforementioned first pipe 210.

[0227] Furthermore, one end of the first pipe 210 passes through the side of the mixer 180 and then bends downward to form a discharge section 212. A discharge port is formed at the lower end of the discharge section 212, and the discharge port is adjacent to the bottom surface of the mixer 180. Gas or liquid carbon dioxide from the first pipe 210 is discharged towards the bottom surface of the mixer 180 through the discharge port of the discharge section 212.

[0228] As described above, when the outlet is located at the lower end of the mixer 180, the additives and detergents, which are located below due to their greater specific gravity, mix more thoroughly with the emitted carbon dioxide.

[0229] For reference, comparing the specific gravity of detergents, additives, and carbon dioxide, additives have the highest specific gravity, while carbon dioxide has the lowest. Furthermore, detergents have a specific gravity similar to or lower than additives but higher than carbon dioxide.

[0230] Therefore, when the detergent and additives are supplied and contained inside the mixer 180, and carbon dioxide is supplied to the lower part of the mixer 180, the relatively low density carbon dioxide flows upward toward the detergent and additives, and in this process, the detergent and additives are mixed with the carbon dioxide.

[0231] Furthermore, water-soluble detergents contain a significant amount of water, so they may freeze at low temperatures. To prevent this, a pressure gauge 181 is installed in the mixer 180 or in a pipeline capable of measuring the pressure of the mixer 180 to regulate the pressure and prevent the pressure of the mixer 180 from falling into the range where the detergent could freeze. The pressure of the mixer 180 can be regulated by the amount of carbon dioxide gas supplied from the distillation tank 120 through the first pipeline 210. The first pipeline 210 may be equipped with a first valve 211 that controls the flow of carbon dioxide gas toward the mixer 180.

[0232] By configuring the first valve 211 described above, the amount of carbon dioxide supplied from the storage tank 190 to the mixer 180 can be adjusted.

[0233] In addition, the detergent dispenser 171 is provided with a detergent inlet at the top and a detergent dispenser lid 173 for opening or closing the inlet. The detergent dispenser lid 173 can be opened to add detergent into the detergent dispenser 171 through the inlet. After the detergent is dispensed, the inlet is closed again with the detergent dispenser lid 173.

[0234] In this invention, after the washing tub 110 and the mixer 180 connected to the washing tub 110 are made into a vacuum state, the detergent and additives in the detergent box 171 and the additive box 172 can be supplied to the mixer 180 by means of pressure difference.

[0235] At this time, the washing tub 110 and the mixer 180 connected to the washing tub 110 can be made into a vacuum state by the suction pressure of the compressor 130.

[0236] In addition, the washing tub 110 and the mixer 180 connected to the washing tub 110 can be made into a vacuum state below atmospheric pressure by the suction pressure generated when the vacuum pump 270 is running.

[0237] The detergent in the detergent box 171 is supplied to the mixer 180 through the detergent supply pipe 241 connecting the upper part of the detergent box 171 and the lower part of the mixer 180, and the additive in the additive box 172 is supplied to the mixer 180 through the additive supply pipe 242 connecting the upper part of the additive box 172 and the lower part of the mixer 180.

[0238] The detergent supply pipe 241 and the additive supply pipe 242 mentioned above are respectively equipped with a detergent valve 243 and an additive valve 244.

[0239] The detergent dispenser 171 and the additive dispenser 172 are at atmospheric pressure (1 bar). Under this condition, the washing tub 110 and the mixer 180 connected to the washing tub 110 are made into a vacuum state. The detergent valve 243 and the additive valve 244 are opened. Then, due to the force caused by the pressure difference, the detergent in the detergent dispenser 171 and the additive in the additive dispenser 172 flow to the mixer 180.

[0240] In addition, turning the mixer 180 into a vacuum reduces the pressure, causing detergent and additives to move into the mixer 180. As a result, the temperature inside the mixer 180 drops, and the detergent and other substances freeze.

[0241] Therefore, by opening the first valve 211, gaseous carbon dioxide from the distillation tank 120 is supplied to the mixer 180 through the first pipe 210, thereby increasing the pressure inside the mixer 180. At this point, gaseous carbon dioxide can be supplied to create a pressure that prevents the water-soluble detergent supplied from the mixer 180 from freezing.

[0242] Furthermore, as described above, carbon dioxide gas is supplied from the distillation tank 120 to the mixer 180 for the first mixing of detergent and additives in the mixer 180. Then, carbon dioxide, which is supplied from the distillation tank 120 and condensed in the liquid phase via the cooler 140, flows into the mixer 180 for the second mixing.

[0243] Furthermore, the mixture of detergent, additives, and carbon dioxide solvent is supplied to the washing tub 110 through the second pipe 220.

[0244] In this way, the mixture of detergent, additives, and carbon dioxide solvent is supplied to the washing tub 110, so that the detergent can come into even contact with the clothes, making it easier to remove water-soluble stains from the clothes to be washed.

[0245] On the other hand, when a mixture of detergent, washing additives and carbon dioxide solvent is delivered from mixer 180 to washing tub 110, the mixture flows to second pipe 220 through multiple pipes 221, 222 and multiple valves 223, 224.

[0246] The second pipe 220 can be connected to the lower side of the mixer 180 via the first discharge pipe 221 and to the upper side of the mixer 180 via the second discharge pipe 222.

[0247] Furthermore, the first discharge pipe 221 may be equipped with a first discharge valve 223, and the second discharge pipe 222 may be equipped with a second discharge valve 224.

[0248] As an example, when the mixture is supplied from the mixer 180 to the washing tub 110, the upper second discharge valve 224 can be opened to supply the mixture to the second pipe 220 through the second discharge pipe 222. Then, the lower first discharge valve 223 can be opened to supply the mixture to the second pipe 220 through the first discharge pipe 221.

[0249] The mixture supplied to the second pipe 220 as described above is supplied to the washing tub 110.

[0250] Furthermore, the second pipe 220 may be equipped with a second pipe valve 225 for switching on and off the flow of the mixture to the side of the washing tub 110.

[0251] The second pipeline valve 225 can be controlled to open only when it is necessary to supply the mixed liquid to the washing tub.

[0252] On the other hand, the reason for supplying the mixture to the second discharge pipe 222 located at the upper part of the mixer 180 first, as described above, and then supplying the mixture to the first discharge pipe 221 located at the lower part of the mixer 180 is as follows.

[0253] Since the mixer 180 is a pressure vessel, it is advantageous to design it with a small diameter and long length for the same volume. Furthermore, since the additives and detergents have a higher specific gravity, they are located at the lower end of the mixer 180. Also, in the initial stage, the carbon dioxide supplied to the distillation tank 120 is more thoroughly mixed, resulting in a mixture of detergent, additives, and carbon dioxide in the upper part of the mixer 180. Therefore, the mixture in the upper part can be supplied to the washing tub 110. Thus, the mixture is first supplied to the second discharge pipe 222 located in the upper part of the mixer 180.

[0254] Afterwards, the mixture that has remained in the upper part for a certain period of time is transported to the washing tank 110. If carbon dioxide is not supplied from the distillation tank 120, the detergent and additives will settle downwards due to density differences.

[0255] Furthermore, the mixture of detergent, additives, and carbon dioxide is located at the lower part of the mixer 180. Therefore, it is necessary to supply the well-mixed mixture at the lower part of the mixer 180 to the washing tub 110. For this purpose, the mixture is later supplied to the first discharge pipe 221 located at the lower part of the mixer 180.

[0256] That is, the mixture located on the upper side of the mixer 180 is first supplied to the washing tub 110, and then the mixture located on the lower side of the mixer 180 is supplied to the washing tub 110, so that a fully mixed mixture can be supplied to the washing tub 110.

[0257] In addition, the detergent, additives and carbon dioxide supplied to the mixer 180 can be mixed by the flow generated when the carbon dioxide supplied to the lower part of the mixer 180 rises due to its relatively low specific gravity.

[0258] Additionally, a stirrer 182 may be provided inside the mixer 180 for uniformly mixing detergent, additives, and carbon dioxide.

[0259] The agitator 182 is connected to the motor 183 and can rotate inside the mixer 180 to ensure that the detergent, additives and carbon dioxide flowing into the mixer 180 are mixed evenly.

[0260] The stirrer 182 described above can rotate in a manner that mixes the fluid inside the mixer 180 in the up-down direction.

[0261] The stirrer 182 described above can also rotate to mix the fluid inside the mixer 180 in a horizontal direction.

[0262] Alternatively, detergent and additives can be added to mixer 180 first, and then carbon dioxide that has been condensed from distillation tank 120 and cooled by cooler 140 can be supplied to mixer 180. At the same time, stirrer 182 is started to evenly mix detergent, detergent additives and carbon dioxide, and then the mixture is delivered from mixer 180 to washing tank 110.

[0263] Furthermore, when the stirrer 182 is installed inside the mixer 180, the mixer 180 becomes a state in which detergent, additives, and carbon dioxide are uniformly mixed. Therefore, by opening the second discharge valve 224, the mixture can be supplied to the second discharge pipe 222 located at the top of the mixer 180.

[0264] The process of supplying a mixture of detergent, additives, and carbon dioxide to the washing tub 110 in the structure described above is explained below.

[0265] First, during the process of vacuuming the washing tub 110 after the laundry is placed into the washing tub 110, the mixer 180 also becomes a vacuum.

[0266] For reference, the compressor 130 can be started to put the washing tub 110 and the mixer 180 into a vacuum state.

[0267] Alternatively, the vacuum pump 270 can be activated to bring the washing tub 110 and the mixer 180 connected to the washing tub 110 into a vacuum state.

[0268] At this time, the second pipe valve 225 is opened, so that in addition to the air in the washing tub 110, the air in the mixer 180 also flows to the washing tub 110 side through the second pipe 220 and can be drawn into the vacuum pump 270.

[0269] At this time, the second pipe valve 225 is opened, so that in addition to the air in the washing tub 110, the air in the mixer 180 also flows to the washing tub 110 side through the second pipe 220 and can be drawn into the vacuum pump 270.

[0270] Furthermore, the detergent in detergent box 171 and the additive in additive box 172 are moved toward the vacuum mixer 180 by the pressure difference.

[0271] For reference, detergent dispenser 171 and additive dispenser 172 are at atmospheric pressure.

[0272] Furthermore, it can also be equipped with a separate pump, through which the operation of the pump moves the detergent in the detergent box 171 and the additive in the additive box 172 toward the mixer 180.

[0273] Furthermore, a portion of the gaseous carbon dioxide from the distillation tank 120 is supplied to the mixer 180 to create pressure that prevents the detergent and additives from freezing.

[0274] Next, the liquid carbon dioxide supplied from the distillation tank 120 and passed through the cooler 140 is conveyed to the mixer 180, and the mixed detergent, additives and carbon dioxide mixture is supplied to the washing tank 110.

[0275] Figure 4 This is a schematic diagram illustrating the basic structure and cycle of a washing machine according to a second embodiment of the present invention. Furthermore, Figure 5 yes Figure 4 A detailed schematic diagram of the confluence structure is shown. In this embodiment, only detergent and additives are mixed in the mixer 180 described above.

[0276] Furthermore, the carbon dioxide supplied from the distillation tank 120 and condensed in the cooler 140 can be combined with the detergent and additives that flow from the mixer 180 to the washing tank 110 and then supplied to the washing tank 110.

[0277] That is, carbon dioxide supplied from distillation tank 120 and condensed in cooler 140 can be supplied to washing tank 110 without passing through mixer 180.

[0278] Reference Figure 4 The present invention is a washing machine that uses carbon dioxide as a solvent. In order to remove not only fat-soluble pollutants but also water-soluble pollutants, detergent and additives are supplied from detergent box 171 and additive box 172 respectively and then mixed. The mixed detergent and additives are supplied to washing tub 110 through second pipe 220.

[0279] Furthermore, carbon dioxide supplied from the distillation tank 120 and condensed in the cooler 140 is supplied to the washing tank 110 via the third pipe 230.

[0280] At this point, the third pipe 230 merges with the second pipe 220.

[0281] At this point, the second pipe 220 and the third pipe 230 mentioned above can also merge.

[0282] Furthermore, at the junction 250 of the second pipe 220 and the third pipe 230, the mixture of detergent and additives can be mixed with the carbon dioxide from the third pipe 230 and then supplied to the washing tub 110.

[0283] Similar to the distillation tank 120 described above, the mixer 180 can be configured as a pressure vessel.

[0284] Furthermore, detergent and detergent additives need to be supplied to the mixer 170 first, and then gaseous carbon dioxide in the distillation tank 120 is supplied to the mixer 180 and adjusted to a certain pressure to prevent the detergent in the mixer 180 from freezing. Liquid carbon dioxide is then supplied to the mixer 180.

[0285] For this purpose, a first pipe 210 may also be included to connect the distillation tank 120 and the mixer 180.

[0286] The first pipe 210 is connected to the upper part of the distillation tank 120, and supplies the gaseous carbon dioxide from the distillation tank 120 to the upper side of the mixer 180.

[0287] The first pipe 210 can bypass the cooler 140 and be connected to the mixer 180.

[0288] In addition, the mixture in the mixer 180, i.e. the mixture containing detergent and additives, can be supplied to the washing tub 110 through the second pipe 220.

[0289] At this point, the carbon dioxide supplied from the distillation tank 120 is condensed as it passes through the cooler 140 and then supplied to the washing tank 110 through the third pipe 230.

[0290] Furthermore, the second pipe 220 can merge with the third pipe 230.

[0291] contrast Figure 1 and Figure 4 Except for the feature that carbon dioxide via cooler 140 is not supplied to mixer 180 but to washing tub 110 via third pipe 230, and the second pipe 220 and third pipe 230 merge, the rest of the configuration is the same.

[0292] Reference Figure 4 Carbon dioxide supplied via cooler 140 to mixer 180 will not mix with detergent and detergent additives. It will be supplied to washing tub 110 after passing through the junction of second pipe 220 and third pipe 230, i.e., junction 250.

[0293] At this point, the liquid carbon dioxide flowing along the third pipe 230 and the detergent and additive mixture flowing along the second pipe 220 need to be evenly mixed and then supplied to the washing tub 110.

[0294] Reference Figure 5 The aforementioned confluence 250 may be formed in the third conduit 230. The aforementioned confluence 250 may be formed in the second conduit 220. The aforementioned confluence 250 may be formed on both sides of the aforementioned second conduit 220 and the third conduit 230.

[0295] In the following description, the case in which the confluence 250 is formed in the third conduit 230 will be used as an example.

[0296] The aforementioned confluence 250 has a structure similar to an ejector, where its flow channel length direction, i.e., its inner diameter, is reduced and then maintained within a certain range before expanding again.

[0297] That is, it is possible to form an inner diameter from the direction of carbon dioxide flow (with) Figure 5 The left and right directions are the reference points. Figure 5 (Based on the left side) to the other side (with) Figure 5 The narrowing portion 251 (with the right side as the reference) gradually decreases, the middle portion 252 has a constant inner diameter, and the enlarged portion 253 has a gradually increasing inner diameter.

[0298] Furthermore, the second pipe 220 can merge with the aforementioned intermediate section 252 so that the detergent and additive mixture supplied from the aforementioned mixer 180 flows into the aforementioned intermediate section 252.

[0299] When the junction 250 is formed as described above, when liquid carbon dioxide flows into the washing tub 110 via the junction 250, the pressure in the junction 250 decreases due to Bernoulli's principle. Due to this decrease in pressure, the detergent and additive mixture located in the mixer 180 is drawn into the junction 250 and merges with the liquid carbon dioxide, moving towards the washing tub 110.

[0300] Therefore, as Figure 5 As shown, the inner diameter A of the third pipe 230 needs to be smaller than the inner diameter B of the intermediate portion 252. (That is, A>B)

[0301] In addition, the greater the difference between the inner diameter A of the third pipe 230 and the inner diameter B of the middle section 252, the greater the pressure drop, and the detergent and additive mixture in the mixer 180 is easily drawn into the confluence section 250 and merged with liquid carbon dioxide.

[0302] Furthermore, the detergent, additive mixture and liquid carbon dioxide are combined in the confluence section 250 and then supplied to the washing tub 110 through the third pipe 230.

[0303] The aforementioned third pipe 230 may be equipped with a third pipe valve 235 for controlling the flow of detergent, additives, and carbon dioxide that converge at the aforementioned confluence 250 to the washing tub 110.

[0304] The process of supplying detergent, additives, and carbon dioxide to the washing tub 110 in the structure described above is explained below.

[0305] First, after the laundry is placed into the washing tub 110, the mixer 180 is also evacuated during the vacuuming process of the washing tub 110.

[0306] For reference, the compressor 130 can be started to bring the washing tub 110 and the mixer 180 into a vacuum state.

[0307] Alternatively, the vacuum pump 270 can be activated to bring the washing tub 110 and the mixer 180 connected to the washing tub 110 into a vacuum state.

[0308] At this time, the second pipe valve 225 is opened, so that in addition to the air in the washing tub 110, the air in the mixer 180 can also flow to the washing tub 110 side through the second pipe 220 and be drawn into the vacuum pump 270.

[0309] Furthermore, the detergent in detergent box 171 and the additive in additive box 172 are moved toward the vacuum mixer 180 by the pressure difference.

[0310] For reference, detergent dispenser 171 and additive dispenser 172 are at atmospheric pressure.

[0311] Furthermore, a separate pump can be installed, through the operation of the aforementioned pump, to move the detergent in the detergent box 171 and the additive in the additive box 172 toward the mixer 180.

[0312] Furthermore, a portion of the gaseous carbon dioxide from the distillation tank 120 is supplied to the mixer 180 to create pressure that prevents the detergent and additives from freezing.

[0313] Next, the liquid carbon dioxide supplied from the distillation tank 120 and then passed through the cooler 140 is transported to the washing tank 110 through the third pipe 230.

[0314] At this time, the third pipe 230 is formed with a confluence 250 that maintains its inner diameter within a certain range. The detergent and additive mixture mixed in the mixer 180 by the pressure difference is drawn into the confluence 250 and then merged with carbon dioxide. Finally, the detergent, additive and carbon dioxide are supplied to the washing tub 110 together.

[0315] Figure 6 This is a schematic diagram of the basic structure and cycle of a washing machine according to a third embodiment of the present invention.

[0316] In this embodiment, only detergent and additives are mixed in the mixer 180.

[0317] Furthermore, the carbon dioxide supplied from the distillation tank 120 and condensed in the cooler 140 is first stored in the storage tank 190 before being supplied to the washing tank 110.

[0318] Furthermore, the detergent and additives that flow from the mixer 180 to the washing tub 110 can be supplied to the washing tub 110 separately from the carbon dioxide.

[0319] That is, the carbon dioxide supplied from the distillation tank 120 and condensed in the cooler 140 does not pass through the mixer 180, but is first stored in the storage tank 190 and then supplied to the washing tank 110.

[0320] Reference Figure 6 The present invention is a washing machine that uses carbon dioxide as a solvent. In order to remove not only fat-soluble pollutants but also water-soluble pollutants, detergent and additives are supplied from detergent box 171 and additive box 172 respectively and then mixed. The mixed detergent and additives are supplied to washing tub 110 through second pipe 220.

[0321] Furthermore, carbon dioxide supplied from the distillation tank 120 and condensed in the cooler 140 is first stored in the storage tank 190 via the third pipe 230 and then supplied to the washing tank 110.

[0322] Reference Figure 6 The third pipe 230 supplies liquid carbon dioxide via the cooler 140 to the washing tub 110 via the distillation tank heat exchanger 121.

[0323] Furthermore, the aforementioned third pipe 230 is provided with a storage tank 190 for storing the condensed carbon dioxide.

[0324] Furthermore, the aforementioned third pipe 230 is equipped with a first intermediate valve 231 for switching on and off the flow of carbon dioxide flowing from the cooler 140 side to the storage tank 190 side.

[0325] In addition, the third pipe 230 is provided with a second intermediate valve 232 for switching on and off the flow of carbon dioxide from the storage tank 190 side to the washing tank 110 side.

[0326] Therefore, when carbon dioxide flows from the cooler 140 side to the storage tank 190 side, the first intermediate valve 231 can be opened, and when carbon dioxide is supplied from the storage tank 190 to the washing tub 110, the second intermediate valve 232 can be opened.

[0327] Similar to the distillation tank 120 described above, the mixer 180 may also be configured as a pressure vessel.

[0328] Furthermore, detergent and detergent additives need to be supplied to the mixer 170 first, and then gaseous carbon dioxide in the distillation tank 120 is supplied to the mixer 180 and adjusted to a certain pressure to prevent the detergent in the mixer 180 from freezing. After that, liquid carbon dioxide is supplied to the mixer 180.

[0329] For this purpose, a first pipe 210 may also be included to connect the distillation tank 120 and the mixer 180.

[0330] The first pipe 210 is connected to the upper part of the distillation tank 120, thereby supplying the gaseous carbon dioxide from the distillation tank 120 to the upper side of the mixer 180.

[0331] The first pipe 210 can bypass the cooler 140 and be connected to the mixer 180.

[0332] In addition, the mixture mixed in the mixer 180, i.e. the mixture containing detergent and additives, can be supplied to the washing tub 110 through the second pipe 220.

[0333] At this point, the carbon dioxide supplied from the distillation tank 120 is condensed as it passes through the cooler 140, and then stored in the storage tank 190 through the third pipe 230 before being supplied to the washing tank 110.

[0334] As another example, the carbon dioxide supplied from the distillation tank 120 is condensed upon passing through the cooler 140 and then directly supplied to the washing tank 110 via the third pipe 230. That is, the aforementioned storage tank 190 may be omitted depending on the circumstances.

[0335] contrast Figure 1 and Figure 6 Except for the feature that the carbon dioxide via the cooler 140 is not supplied to the mixer 180, but is stored in the storage tank 190 via the third pipe 230, the rest of the composition is the same.

[0336] Reference Figure 6Instead of being supplied to the mixer 180 to mix with detergent and detergent additives, the carbon dioxide from the cooler 140 is first stored in the storage tank 190 and then supplied to the washing tub 110 via the third pipe 230.

[0337] At this time, the detergent and additive mixture mixed in the mixer 180 can be supplied to the washing tub 110 through the second pipe 220.

[0338] The process of supplying detergent, additives, and carbon dioxide to the washing tub 110 in the configuration described above is explained below.

[0339] First, during the process of vacuuming the washing tub 110 after the laundry is placed into the washing tub 110, the mixer 180 also becomes a vacuum.

[0340] For reference, the compressor 130 can be started to put the washing tub 110 and the mixer 180 into a vacuum state.

[0341] Alternatively, the vacuum pump 270 can be activated to bring the washing tub 110 and the mixer 180 connected to the washing tub 110 into a vacuum state.

[0342] At this time, the second pipe valve 225 is opened, so that in addition to the air in the washing tub 110, the air in the mixer 180 also flows to the washing tub 110 side through the second pipe 220 and can be drawn into the vacuum pump 270.

[0343] Furthermore, the detergent in detergent box 171 and the additive in additive box 172 are moved toward the vacuum mixer 180 by the pressure difference.

[0344] For reference, detergent dispenser 171 and additive dispenser 172 are at atmospheric pressure.

[0345] Furthermore, a separate pump can be installed, through the operation of the aforementioned pump, to move the detergent in the detergent box 171 and the additive in the additive box 172 toward the mixer 180.

[0346] Furthermore, a portion of the gaseous carbon dioxide from the distillation tank 120 is supplied to the mixer 180 to create pressure that prevents the detergent and additives from freezing.

[0347] Next, the liquid carbon dioxide supplied from the distillation tank 120 and then passed through the cooler 140 is stored in the storage tank 190 via the third pipe 230. Furthermore, carbon dioxide from the storage tank 190 is supplied to the washing tub 110.

[0348] Furthermore, the mixture of detergent and additives mixed in mixer 180 is supplied to washing tub 110 through second pipe 220.

[0349] It should be noted that, at this time, before the liquid carbon dioxide stored in the storage tank 190 is supplied to the washing tub 110, the mixture of detergent and additives mixed in the mixer 180 is first supplied to the washing tub 110.

[0350] Alternatively, in this embodiment, a liquid pipe 280 may be provided for guiding the liquid carbon dioxide stored in the storage tank 190 to the mixer 180 side.

[0351] That is, it may or may not have the above-mentioned liquid pipe 280.

[0352] When the liquid pipe 280 is provided, the liquid pipe 280 may be equipped with a liquid pipe valve 281 for switching on and off the flow of liquid carbon dioxide flowing from the storage tank 190 to the mixer 180.

[0353] Therefore, when the liquid pipe valve 281 is opened, the liquid carbon dioxide in the storage tank 190 can flow to the mixer 180 side.

[0354] The process of supplying detergent, additives, and carbon dioxide to the washing tub 110 in the structure described above is explained below.

[0355] First, during the process of vacuuming the washing tub 110 after the laundry is placed into the washing tub 110, the mixer 180 also becomes a vacuum.

[0356] For reference, the compressor 130 can be started to put the washing tub 110 and the mixer 180 into a vacuum state.

[0357] Alternatively, the vacuum pump 270 can be activated to bring the washing tub 110 and the mixer 180 connected to the washing tub 110 into a vacuum state.

[0358] At this time, the second pipe valve 225 is opened, so that in addition to the air in the washing tub 110, the air in the mixer 180 also flows to the washing tub 110 side through the second pipe 220 and can be drawn into the vacuum pump 270.

[0359] Furthermore, the detergent in detergent box 171 and the additive in additive box 172 are moved toward the vacuum mixer 180 by the pressure difference.

[0360] For reference, detergent dispenser 171 and additive dispenser 172 are at atmospheric pressure.

[0361] Furthermore, a separate pump can be installed, through the operation of the aforementioned pump, to move the detergent in the detergent box 171 and the additive in the additive box 172 toward the mixer 180.

[0362] Furthermore, a portion of the gaseous carbon dioxide from the distillation tank 120 is supplied to the mixer 180 to create pressure that prevents the detergent and additives from freezing.

[0363] Next, the liquid pipe valve 281 is opened, and the liquid carbon dioxide in the storage tank 190 is transported to the mixer 180 through the liquid pipe 280. The detergent, additive and carbon dioxide mixture mixed in the mixer 180 is then supplied to the washing tub 110.

[0364] According to the present invention, a washing machine utilizing carbon dioxide can remove not only grease-soluble contaminants but also water-soluble contaminants, thereby having the advantage of achieving differentiated washing performance compared to existing washing machines that primarily remove grease-soluble contaminants.

[0365] In addition, there is no need to use a hydraulic pump to deliver detergent and additives to the mixer and washing tub. Detergent and additives are supplied by pressure difference while the mixer and washing tub are in a vacuum state, which also has the advantage of reducing component prices and pump maintenance costs.

[0366] The above description of the present invention is merely illustrative. Those skilled in the art should understand that other specific modifications can be easily made without altering the technical concept or essential features of the invention. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is defined by the claims, and it should be interpreted that all modifications or variations derived from the meaning, scope, and equivalent concepts of the claims are included within the scope of the present invention.

Claims

1. A washing machine, comprising: A laundry tub, which forms an internal space for placing and processing laundry items, and includes a laundry tub heat exchanger for maintaining a constant temperature of carbon dioxide within the laundry tub. A distillation tank, used to separate pollutants contained in the liquid carbon dioxide discharged from the aforementioned washing tank; The compressor draws in gaseous carbon dioxide stored in the distillation tank and discharges it. A cooler that condenses and liquefies the gaseous carbon dioxide discharged from the distillation tank; and A mixer that mixes at least two of the detergent, additives and liquid carbon dioxide from the cooler to be supplied to the washing tub.

2. The washing machine according to claim 1, wherein, The carbon dioxide, which is liquefied during the cooling process, is supplied to the mixer to be mixed with at least one chemical additive, detergent, and additive.

3. The washing machine according to claim 1, wherein, Also includes: A detergent dispenser, connected to the aforementioned mixer, is used to store detergent; as well as An additive box, which is connected to the mixer described above, is used to store additives.

4. The washing machine according to claim 3, wherein, include: A detergent supply pipe for connecting the detergent dispenser and the mixer. A detergent valve, located on the detergent supply pipe, controls the flow of detergent to the mixer. An additive supply pipe, used to connect the detergent dispenser and the mixer; and An additive valve is provided on the additive supply pipe to control the flow of the additive to the mixer.

5. The washing machine according to claim 4, wherein, When the washing tub and the mixer are under vacuum, and the detergent valve and the additive valve are opened, due to the pressure difference, the detergent in the detergent box flows to the mixer, and the additive in the additive box flows to the mixer.

6. The washing machine according to claim 1, wherein, Also includes: The second pipe is used to connect the mixer and the washing tub, thereby transferring the mixture prepared by the mixer to the washing tub.

7. The washing machine according to claim 6, wherein, include: The first discharge pipe is used to connect the lower part of the mixer and the second pipe. A first discharge valve is provided on the first discharge pipe to control the flow of the mixture from the mixer to the second pipe. A second discharge pipe is used to connect the upper part of the mixer and the second pipe; and The second discharge valve, which is located in the second discharge pipe, controls the flow of the mixture from the mixer to the second pipe.

8. The washing machine according to claim 7, wherein, By opening the second discharge valve, the mixture located at the top of the mixer is first supplied to the washing tub. Open the first discharge valve to supply the mixture located at the bottom of the mixer to the washing tub.

9. The washing machine according to claim 1, wherein, An agitator is provided in the mixer, which is connected to a motor and rotates to generate forced flow so that detergent, at least one chemical additive, additive, and carbon dioxide flowing into the mixer are mixed.

10. The washing machine according to claim 1, wherein, include: The first pipe bypasses the aforementioned cooler and connects to the upper part of the aforementioned distillation tank and the aforementioned mixer.

11. The washing machine according to claim 10, wherein, While detergent and additives are being supplied to the mixer, carbon dioxide gas from the distillation tank is supplied to the mixer through the first pipe.

12. The washing machine according to claim 10, wherein, The liquid carbon dioxide condensed in the aforementioned cooler is supplied to the aforementioned mixer through a third pipe, where it is mixed with detergent and additives and then supplied to the aforementioned washing machine.

13. The washing machine according to claim 12, wherein, The third pipe merges with the first pipe, and the liquid carbon dioxide condensed in the cooler flows along the third pipe and is supplied to the mixer after merging with the first pipe.

14. The washing machine according to claim 10, wherein, One side of the first pipe is connected to the upper part of the distillation tank, and the other side passes through the side of the mixer and then bends downward inside the mixer to form a discharge section.

15. The washing machine according to claim 14, wherein, The lower end of the aforementioned discharge section has a discharge port for discharging carbon dioxide, and the discharge port is formed adjacent to the lower end of the aforementioned mixer.

16. The washing machine according to claim 1, wherein, include: The third pipe is used to guide the liquid carbon dioxide that is condensed when passing through the aforementioned cooler to the washing tub side. as well as The second pipe, which is connected to the mixer on one side and merges with the third pipe on the other side, guides the detergent and additives mixed in the mixer to the third pipe.

17. The washing machine according to claim 16, wherein, The third pipe forms a confluence where its inner diameter narrows, and the second pipe merges with the confluence.

18. The washing machine according to claim 17, wherein, The aforementioned confluence includes: The narrowing section is formed by its inner diameter gradually decreasing along the direction of carbon dioxide flow; The middle portion, which connects to the aforementioned narrowed portion, is configured to maintain a constant narrowed inner diameter; and The enlarged section, which is connected to the aforementioned intermediate section, is formed such that its inner diameter gradually increases.

19. The washing machine according to claim 1, wherein, include: The third pipe guides the liquid carbon dioxide that is condensed when passing through the aforementioned cooler to the side of the aforementioned washing tub; as well as The storage tank, located in the third pipe mentioned above, stores liquid carbon dioxide and then supplies it to the washing tub.

20. The washing machine according to claim 19, wherein, include: The second pipe, connected on one side to the mixer and on the other side to the washing tub, guides the detergent and additives mixed in the washing tub into the washing tub.

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