Ultrasonic welding device for washing machine top cover and welding method thereof

Abstract

The invention belongs to the technical field of ultrasonic welding, and discloses an ultrasonic welding device for a top cover of a washing machine and a welding method thereof.The ultrasonic welding device comprises a device body, a welding structure is arranged in the device body, a storage table is arranged below the welding structure, and a purification assembly is arranged in the device body; the purification assembly comprises a negative pressure fan arranged in the device body, a first connecting pipe is installed on one side of the negative pressure fan, a second connecting pipe is fixedly connected to the bottom end of the first connecting pipe, air suction pipes are evenly arranged at the bottom end of the second connecting pipe, a filter cavity is formed in the top end of the first connecting pipe, and the filter cavity is formed in the device body. When the washing machine top cover is subjected to ultrasonic welding, the negative pressure fan is started, the first connecting pipe is connected with the second connecting pipe, gas during welding is sucked into the filter cavity through the gas suction pipe, and finally the gas is discharged out of the device from the gas outlet pipe after being filtered by water in the filter cavity, so that the working environment quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic welding, and in particular relates to an ultrasonic welding device for a washing machine top cover and a welding method thereof. Background Art

[0002] Ultrasonic welding equipment converts 50 / 60 Hz current into high-frequency electrical energy (such as 15, 20, 30 or 40KHz) through an ultrasonic generator, and then converts this high-frequency electrical energy into mechanical vibration energy of the corresponding frequency through a transducer. This mechanical vibration energy is transmitted to the welding head through a horn device, and the welding head then directly transmits the vibration energy to the joint of the workpiece to be welded. At the joint, the vibration energy is converted into heat energy through friction to melt the plastic or other materials. When the ultrasonic wave stops working, the melt is solidified on the bonding surface by maintaining a certain pressure to form a strong molecular chain, thereby achieving the purpose of welding;

[0003] Due to its unique welding principle and advantages, ultrasonic welding equipment has been widely used in many industries, especially in the welding application of washing machine top cover. The energy generated by ultrasonic vibration can efficiently weld the washing machine top cover plate parts together without adding any auxiliary welding materials, and the welding effect is good.

[0004] After searching, such as patent: CN221870889U, an ultrasonic drum washing machine top cover welding device comprises an outer box, a base is fixedly installed at the bottom of the outer box, a fixing device is arranged on the inner side of the outer box, the fixing device comprises a placement box, a first motor, a threaded rod, a movable sleeve, a support plate, a second motor, a first bevel gear, a second bevel gear, a rotating rod and a pressing plate, the outer side of the placement box is fixedly installed with a first motor, the ultrasonic drum washing machine top cover welding device first starts the first motor, the output shaft thereof rotates to drive the threaded rod to rotate, the threaded rod rotates to drive the movable sleeve on the outer side to move toward each other, and the left and right sides of the cover are fixed, and then the second motor is started, the output shaft thereof drives the rotating rod and the pressing plate to rotate, the pressing plate rotates and then drives the cover to rotate, so as to facilitate welding of the cover at different angles, and finally the third motor is started, the output shaft thereof drives the placement box to rotate, and the welding direction of the cover is adjusted, which is convenient and practical;

[0005] However, when ultrasonic welding is performed on the top cover of a washing machine, the ultrasonic welding machine will generate smoke, particles or other harmful gases during operation. If these gases remain in the operating environment for a long time, they may affect the health of nearby workers. Summary of the invention

[0006] The object of the present invention is to provide an ultrasonic welding device and a welding method for a washing machine top cover to solve the problems raised in the above background technology.

[0007] In order to achieve the above-mentioned object, the present invention provides the following technical solution: an ultrasonic welding device for a washing machine top cover, comprising a device body, a welding structure is arranged inside the device body, a storage platform is arranged below the welding structure, and a purification component is arranged inside the device body;

[0008] Among them, the purification component includes a negative pressure fan arranged inside the device body, a first connecting pipe is installed on one side of the negative pressure fan, the bottom end of the first connecting pipe is fixedly connected to the second connecting pipe, the bottom end of the second connecting pipe is evenly provided with an intake pipe, the top end of the first connecting pipe is provided with a filter chamber, the filter chamber is opened inside the device body, and the top end of the filter chamber is provided with an outlet pipe.

[0009] As a further technical solution of the present invention, a one-way valve is installed on the outer wall of the first connecting pipe.

[0010] As a further technical solution of the present invention, a third connecting pipe is arranged above the intake pipe, the third connecting pipe is fixedly installed on one side of the second connecting pipe, the top of the third connecting pipe is fixedly connected to a fourth connecting pipe, and a control component is arranged inside the fourth connecting pipe.

[0011] As a further technical solution of the present invention, a second rotating shaft is arranged inside the filter cavity, and second filter plates are evenly installed on the outer wall of the second rotating shaft in a ring array.

[0012] As a further technical solution of the present invention, the second rotating shaft is rotatably installed inside the device body.

[0013] As a further technical solution of the present invention, a first filter is installed inside the air outlet pipe.

[0014] As a further technical solution of the present invention, the control component includes a control plate arranged inside the fourth connecting tube, and two control plates are provided. Both control plates are rotatably installed inside the fourth connecting tube through a first rotating shaft, one end of each of the two first rotating shafts is fixedly connected to a first gear, one side of each of the two first gears is meshedly connected to a first rack plate, one side of one of the first rack plates is meshedly connected to a second gear, and a second rack plate is fixedly installed at the bottom end of the other first rack plate, the second rack plate is meshedly connected to the second gear, and a cylinder is installed at the top of the second rack plate.

[0015] As a further technical solution of the present invention, sealing gaskets are fixedly installed on the inner walls of the third connecting pipe, the fourth connecting pipe and the air outlet pipe.

[0016] As a further technical solution of the present invention, an activated carbon plate is installed inside the fourth connecting pipe.

[0017] A welding method of an ultrasonic welding device for a washing machine top cover comprises the following steps:

[0018] S1: When ultrasonic welding is performed on the washing machine top cover, the washing machine top cover is first placed on the top of the storage table, and then welded through the welding structure;

[0019] S2: When welding, the negative pressure fan is started, connected with the second connecting pipe through the first connecting pipe, and the gas during welding is sucked into the filter chamber through the suction pipe and the third connecting pipe, and then discharged into the outlet pipe after being filtered by the water inside the filter chamber and the second filter plate, and finally discharged from the device after being filtered again by the first filter screen;

[0020] S3: After welding, the second rack plate is driven downward by the cylinder, and the movement of the second rack plate drives one of the first rack plates to move downward. At the same time, the movement of the second rack plate drives the rotation of the second gear, and the rotation of the second gear drives the other first rack plate to move, so that the two first rack plates move at the same time, the movement of the first rack plate drives the rotation of the first gear, the rotation of the first gear drives the rotation of the first rotating shaft, and the rotation of the first rotating shaft drives the rotation of the control board, so that the control board inside the fourth connecting pipe rotates to open the fourth connecting pipe, one of the control boards rotates to the inside of the third connecting pipe to close the passage between the third connecting pipe and the second connecting pipe, and the other control board rotates to the inside of the air outlet pipe to close the passage between the filter chamber and the air outlet pipe. At this time, the welding gas inhaled from the intake pipe is filtered through the filter chamber and then guided through the fourth connecting pipe to finally be discharged from the third connecting pipe. The temperature of the gas filtered by the water in the filter chamber is reduced, and it is blown to the top cover of the washing machine welded on the surface of the storage table to cool it down.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The present invention sets a purification component. When ultrasonic welding is performed on the top cover of the washing machine, the top cover of the washing machine is first placed on the top of the storage table, and then welded through the welding structure. During welding, the negative pressure fan is started, connected to the second connecting pipe through the first connecting pipe, and the gas during welding is sucked into the filter chamber through the suction pipe. Finally, the gas is discharged from the device through the outlet pipe after being filtered by the water inside the filter chamber, which helps to improve the quality of the working environment.

[0023] 2. The present invention is provided with a control component. After the top cover of the washing machine is ultrasonically welded, the second rack plate is driven downward by the cylinder drive. The movement of the second rack plate drives one of the first rack plates to move downward. At the same time, the movement of the second rack plate drives the rotation of the second gear. The rotation of the second gear drives another first rack plate to move, so that the two first rack plates move simultaneously. The movement of the first rack plate drives the rotation of the first gear. The rotation of the first gear drives the rotation of the first rotating shaft. The rotation of the first rotating shaft drives the rotation of the control board, so that the control board inside the fourth connecting pipe rotates to open the fourth connecting pipe. One of the control boards rotates to the inside of the third connecting pipe to close the passage between the third connecting pipe and the second connecting pipe. The other control board rotates to the inside of the air outlet pipe to close the passage between the filter chamber and the air outlet pipe. At this time, the welding gas inhaled from the air intake pipe is filtered through the filter chamber and then guided through the fourth connecting pipe to finally be discharged from the third connecting pipe. The temperature of the gas after being filtered by the water in the filter chamber is reduced, and it is blown to the top cover of the washing machine welded on the surface of the storage table to cool it, accelerate the cooling and solidification process of the welding part, and indirectly improve the production efficiency.

[0024] 3. The present invention provides a sealing gasket. When both control panels are located inside the fourth connecting pipe, the sealing gasket on one side of the control panel is used to seal the gap between the control panel and the fourth connecting pipe to prevent gas from entering the fourth connecting pipe during normal exhaust. When the two control panels are rotated and located inside the exhaust pipe and the third connecting pipe respectively, they are sealed by the sealing gasket to ensure the stability of gas flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention;

[0027] Figure 3 For the present invention Figure 2 A schematic diagram of the structure enlargement in the middle;

[0028] Figure 4 For the present invention Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0029] Figure 5 It is a schematic diagram of the structure of the air intake pipe, the third connecting pipe, the fourth connecting pipe and the air outlet pipe of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of the control panel of the present invention;

[0031] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at C in the middle;

[0032] Figure 8 It is a structural schematic diagram of the second filter plate of the present invention.

[0033] In the figure: 1. Device body; 2. Welding structure; 3. Negative pressure fan; 4. First connecting pipe; 5. Second connecting pipe; 6. Intake pipe; 7. One-way valve; 8. Filter chamber; 9. Exhaust pipe; 10. First filter screen; 11. Third connecting pipe; 12. Fourth connecting pipe; 13. Control board; 14. First rotating shaft; 15. Sealing gasket; 16. First gear; 17. First rack plate; 18. Second gear; 19. Second rack plate; 20. Cylinder; 21. Second filter plate; 22. Activated carbon plate; 23. Storage table; 24. Second rotating shaft. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] like Figures 1 to 8 As shown, in an embodiment of the present invention, an ultrasonic welding device for a washing machine top cover includes a device body 1, a welding structure 2 is arranged inside the device body 1, a storage table 23 is arranged below the welding structure 2, and a purification component is arranged inside the device body 1;

[0036] Among them, the purification component includes a negative pressure fan 3 arranged inside the device body 1, a first connecting pipe 4 is installed on one side of the negative pressure fan 3, the bottom end of the first connecting pipe 4 is fixedly connected to the second connecting pipe 5, the bottom end of the second connecting pipe 5 is evenly provided with an intake pipe 6, and the top of the first connecting pipe 4 is provided with a filter chamber 8, the filter chamber 8 is opened inside the device body 1, and the top of the filter chamber 8 is provided with an outlet pipe 9.

[0037] Water is arranged inside the filter chamber 8, and pollutants in the air are captured and dissolved in the water, thereby achieving air purification;

[0038] Purification components are provided on both sides of the device body 1;

[0039] By setting the purification component, when ultrasonic welding is performed on the washing machine top cover, the washing machine top cover is first placed on the top of the storage table 23, and then welded by the welding structure 2;

[0040] When welding, the negative pressure fan 3 is started, connected with the second connecting pipe 5 through the first connecting pipe 4, and the gas during welding is sucked into the filter chamber 8 through the suction pipe 6, and finally discharged from the device through the outlet pipe 9 after being filtered by the water inside the filter chamber 8, which helps to improve the quality of the working environment.

[0041] like Figure 3 and Figure 5 As shown, a one-way valve 7 is installed on the outer wall of the first connecting pipe 4 .

[0042] The water in the filter chamber 8 is prevented from flowing back, so as to ensure the stability of gas purification.

[0043] like Figure 3 and Figure 5 As shown, a third connecting pipe 11 is arranged above the air intake pipe 6, and the third connecting pipe 11 is fixedly installed on one side of the second connecting pipe 5. A fourth connecting pipe 12 is fixedly connected to the top of the third connecting pipe 11, and a control component is arranged inside the fourth connecting pipe 12.

[0044] When ultrasonic welding is performed on the top cover of the washing machine, the two control panels 13 are both located inside the fourth connecting pipe 12, so that the fourth connecting pipe 12 is in a sealed state. The gas during welding is sucked away from the third connecting pipe 11 and the suction pipe 6, which can increase the area and effect of sucking away the welding gas.

[0045] like Figure 3 and Figure 8 As shown, a second rotating shaft 24 is disposed inside the filter chamber 8, and second filter plates 21 are evenly mounted on the outer wall of the second rotating shaft 24 in a ring array.

[0046] The second filter plate 21 is disposed in the water source in the filter chamber 8. When the gas passes through the water layer, impurities such as suspended matter and particulate matter in the gas are intercepted and removed by the second filter plate 21, thereby improving the purification effect.

[0047] like Figure 3 and Figure 8 As shown, the second rotating shaft 24 is rotatably installed inside the device body 1.

[0048] like Figure 4 As shown, a first filter screen 10 is installed inside the air outlet pipe 9 .

[0049] When the welding gas is filtered by the water in the filter chamber 8 and the second filter plate 21, it is discharged into the outlet pipe 9 and filtered again by the first filter screen 10, which further improves the purification effect of the welding gas and thus improves the safety of the device.

[0050] like Figure 3 , Figure 4 , Figure 6 and Figure 7As shown, the control component includes a control board 13 arranged inside the fourth connecting tube 12, and two control boards 13 are provided. The two control boards 13 are both rotatably installed inside the fourth connecting tube 12 through the first rotating shaft 14, and one end of the two first rotating shafts 14 is fixedly connected to the first gear 16, and one side of the two first gears 16 is meshedly connected to the first rack plate 17, one side of one of the first rack plates 17 is meshedly connected to the second gear 18, and the bottom end of the other first rack plate 17 is fixedly installed with a second rack plate 19, the second rack plate 19 is meshedly connected to the second gear 18, and the top end of the second rack plate 19 is installed with a cylinder 20.

[0051] Through the setting of the control component, after the ultrasonic welding of the washing machine top cover, the cylinder 20 drives the second rack plate 19 to move downward, and the movement of the second rack plate 19 drives one of the first rack plates 17 to move downward. At the same time, the movement of the second rack plate 19 drives the rotation of the second gear 18, and the rotation of the second gear 18 drives the other first rack plate 17 to move, so that the two first rack plates 17 move at the same time, the movement of the first rack plate 17 drives the rotation of the first gear 16, and the rotation of the first gear 16 drives the rotation of the first rotating shaft 14, and the rotation of the first rotating shaft 14 drives the rotation of the control board 13, so that the inside of the fourth connecting pipe 12 The control panel 13 is rotated to open the fourth connecting pipe 12, one of the control panels 13 is rotated to the inside of the third connecting pipe 11 to close the passage between the third connecting pipe 11 and the second connecting pipe 5, and the other control panel 13 is rotated to the inside of the air outlet pipe 9 to close the passage between the filter chamber 8 and the air outlet pipe 9. At this time, the welding gas sucked from the air intake pipe 6 is filtered by the filter chamber 8 and then guided through the fourth connecting pipe 12 to be finally discharged from the third connecting pipe 11. The temperature of the gas after being filtered by the water in the filter chamber 8 is reduced, and it is blown to the top cover of the washing machine welded on the surface of the storage table 23 to cool it down, thereby accelerating the cooling and solidification process of the welding part, and indirectly improving the production efficiency.

[0052] like Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, sealing gaskets 15 are fixedly installed on the inner walls of the third connecting pipe 11 , the fourth connecting pipe 12 and the air outlet pipe 9 .

[0053] Sealing pads 15 are provided on both sides of the two control panels 13;

[0054] When both control boards 13 are located inside the fourth connecting pipe 12, the gap between the control board 13 and the fourth connecting pipe 12 is sealed by the sealing gasket 15 on one side of the control board 13 to prevent gas from entering the fourth connecting pipe 12 during normal exhaust.

[0055] When the two control plates 13 are rotated and located inside the gas outlet pipe 9 and the third connecting pipe 11 respectively, they are sealed by the sealing gasket 15 to ensure the stability of gas flow.

[0056] like Figure 3 As shown, an activated carbon plate 22 is installed inside the fourth connecting pipe 12 .

[0057] When the gas is discharged downward from the inside of the fourth connecting pipe 12, the activated carbon 22 adsorbs the water vapor in the gas, thereby reducing the humidity of the gas when it is blown.

[0058] A welding method of an ultrasonic welding device for a washing machine top cover comprises the following steps:

[0059] S1: When ultrasonic welding is performed on the top cover of the washing machine, the top cover of the washing machine is first placed on the top of the storage table 23, and then welded through the welding structure 2;

[0060] S2: When welding, the negative pressure fan 3 is started, connected with the second connecting pipe 5 through the first connecting pipe 4, and the gas during welding is sucked into the filter chamber 8 through the suction pipe 6 and the third connecting pipe 11, and then discharged into the outlet pipe 9 after being filtered by the water inside the filter chamber 8 and the second filter plate 21, and finally discharged from the device after being filtered again by the first filter screen 10;

[0061] S3: After welding, the cylinder 20 drives the second rack plate 19 to move downward, and the movement of the second rack plate 19 drives one of the first rack plates 17 to move downward. At the same time, the movement of the second rack plate 19 drives the rotation of the second gear 18, and the rotation of the second gear 18 drives the other first rack plate 17 to move, so that the two first rack plates 17 move at the same time, the movement of the first rack plate 17 drives the rotation of the first gear 16, and the rotation of the first gear 16 drives the rotation of the first rotating shaft 14, and the rotation of the first rotating shaft 14 drives the rotation of the control plate 13, so that the fourth connecting pipe 1 2, the control panel 13 inside rotates to open the fourth connecting pipe 12, one of the control panels 13 rotates to the inside of the third connecting pipe 11 to close the passage between the third connecting pipe 11 and the second connecting pipe 5, and the other control panel 13 rotates to the inside of the air outlet pipe 9 to close the passage between the filter chamber 8 and the air outlet pipe 9. At this time, the welding gas sucked from the air intake pipe 6 is filtered by the filter chamber 8 and then guided through the fourth connecting pipe 12 to finally be discharged from the third connecting pipe 11. The temperature of the gas filtered by the water in the filter chamber 8 is reduced, and it is blown to the top cover of the washing machine welded on the surface of the storage table 23 to cool it down.

[0062] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic welding device for a washing machine top cover, comprising a device body (1), characterized in that: A welding structure (2) is arranged inside the device body (1), a storage table (23) is arranged below the welding structure (2), and a purification component is arranged inside the device body (1); The purification component comprises a negative pressure fan (3) arranged inside the device body (1); a first connecting tube (4) is installed on one side of the negative pressure fan (3); the bottom end of the first connecting tube (4) is fixedly connected to a second connecting tube (5); the bottom end of the second connecting tube (5) is evenly provided with an air intake tube (6); the top end of the first connecting tube (4) is provided with a filter chamber (8); the filter chamber (8) is opened inside the device body (1); and the top end of the filter chamber (8) is provided with an air outlet pipe (9).

2. The ultrasonic welding device for a washing machine top cover according to claim 1, characterized in that: A one-way valve (7) is installed on the outer wall of the first connecting pipe (4).

3. The ultrasonic welding device for a washing machine top cover according to claim 1, characterized in that: A third connecting pipe (11) is arranged above the air intake pipe (6), the third connecting pipe (11) is fixedly installed on one side of the second connecting pipe (5), the top end of the third connecting pipe (11) is fixedly connected to a fourth connecting pipe (12), and a control component is arranged inside the fourth connecting pipe (12).

4. The ultrasonic welding device for a washing machine top cover according to claim 1, characterized in that: A second rotating shaft (24) is arranged inside the filter cavity (8), and second filter plates (21) are evenly mounted on the outer wall of the second rotating shaft (24) in an annular array.

5. The ultrasonic welding device for a washing machine top cover according to claim 4, characterized in that: The second rotating shaft (24) is rotatably mounted inside the device body (1).

6. The ultrasonic welding device for a washing machine top cover according to claim 1, characterized in that: A first filter screen (10) is installed inside the air outlet pipe (9).

7. The ultrasonic welding device for a washing machine top cover according to claim 3, characterized in that: The control assembly comprises a control panel (13) arranged inside the fourth connecting tube (12), wherein two control panels (13) are provided, and the two control panels (13) are both rotatably mounted inside the fourth connecting tube (12) via a first rotating shaft (14), one end of each of the two first rotating shafts (14) is fixedly connected to a first gear (16), one side of each of the two first gears (16) is meshedly connected to a first rack plate (17), one side of one of the first rack plates (17) is meshedly connected to a second gear (18), a second rack plate (19) is fixedly mounted at the bottom end of the other first rack plate (17), the second rack plate (19) is meshedly connected to the second gear (18), and a cylinder (20) is mounted at the top end of the second rack plate (19).

8. The ultrasonic welding device for a washing machine top cover according to claim 3, characterized in that: The inner walls of the third connecting pipe (11), the fourth connecting pipe (12) and the air outlet pipe (9) are all fixedly mounted with sealing pads (15).

9. The ultrasonic welding device for a washing machine top cover according to claim 8, characterized in that: An activated carbon plate (22) is installed inside the fourth connecting pipe (12).

10. A welding method for an ultrasonic welding device for a washing machine top cover, the method being applicable to the ultrasonic welding device for a washing machine top cover as claimed in claims 1 to 9, characterized in that: The following steps are involved: S1: When ultrasonic welding is performed on the top cover of the washing machine, the top cover of the washing machine is first placed on the top of the storage table (23), and then welded using the welding structure (2); S2: When welding, the negative pressure fan (3) is started, connected to the second connecting pipe (5) through the first connecting pipe (4), and the gas during welding is sucked into the filter chamber (8) through the suction pipe (6) and the third connecting pipe (11), and then discharged into the outlet pipe (9) after being filtered through the water inside the filter chamber (8) and the second filter plate (21), and finally filtered again through the first filter screen (10) before being discharged from the device; S3: After welding, the cylinder (20) drives the second rack plate (19) to move downward, and the movement of the second rack plate (19) drives one of the first rack plates (17) to move downward. At the same time, the movement of the second rack plate (19) drives the second gear (18) to rotate, and the rotation of the second gear (18) drives the other first rack plate (17) to move, so that the two first rack plates (17) move simultaneously, the movement of the first rack plate (17) drives the rotation of the first gear (16), the rotation of the first gear (16) drives the rotation of the first rotating shaft (14), and the rotation of the first rotating shaft (14) drives the rotation of the control plate (13), so that the fourth connecting pipe (12) is rotated. The control panel (13) of the part is rotated to open the fourth connecting pipe (12), one of the control panels (13) is rotated to the inside of the third connecting pipe (11) to close the passage between the third connecting pipe (11) and the second connecting pipe (5), and the other control panel (13) is rotated to the inside of the air outlet pipe (9) to close the passage between the filter chamber (8) and the air outlet pipe (9). At this time, the welding gas sucked from the air intake pipe (6) is filtered by the filter chamber (8) and then guided through the fourth connecting pipe (12) to finally be discharged from the third connecting pipe (11). The temperature of the gas after being filtered by the water in the filter chamber (8) is reduced, and it is blown toward the top cover of the washing machine welded on the surface of the storage table (23) to cool it.

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