A drum assembly, a washer-dryer

Abstract

The present application provides a kind of drum assembly, washing and drying integrated machine, wherein a kind of drum assembly includes: inner tube and outer tube, the inner tube is located in the outer tube, and, the inner tube with the gap between the outer tube, along the circumference of the outer tube, first connecting pipe is arranged on the inner wall of the outer tube, the first connecting pipe has heat exchange medium, the heat exchange medium can be heat exchanged with the air in the gap by the first connecting pipe, to heat exchange the washing article in the inner tube, according to the present application, the defects that clothes are not heated uniformly in the heat pump drying machine in the prior art can be overcome, and the drying efficiency and user experience are improved.

Description

Technical Field

[0001] This invention relates to the field of washer-dryer technology, specifically to a drum assembly and washer-dryer. Background Technology

[0002] Most heat pump dryers on the market use a combination of condenser and evaporator. The fan draws the hot and humid air from inside the drum to the evaporator for dehumidification, and then heats it again through the condenser before blowing it back into the drum through the air duct. This method can cause the hot air to short-circuit inside the drum. Since the condensed liquid in the air duct can easily enter the fan, the hot air can also short-circuit, resulting in uneven heating of the clothes. As a result, the dried clothes will be partially dry and partially damp.

[0003] Because existing heat pump dryers have technical problems such as liquid condensing in the air duct easily entering the fan, which can cause hot air to short-circuit and result in uneven heating of clothes, this invention researches and designs a drum assembly and washer-dryer combo. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of uneven heating of clothes in the heat pump dryer in the prior art, thereby providing a drum assembly and washer-dryer combo.

[0005] To address the above problems, the present invention provides a roller assembly comprising:

[0006] The device comprises an inner cylinder and an outer cylinder, wherein the inner cylinder is located inside the outer cylinder and there is a gap between the inner cylinder and the outer cylinder. A first connecting pipe is provided on the inner wall of the outer cylinder along the circumference of the outer cylinder. The first connecting pipe contains a heat exchange medium, which can exchange heat with the air in the gap through the first connecting pipe, thereby exchanging heat with the cleaning items inside the inner cylinder.

[0007] In some embodiments, a plurality of heat dissipation plates are spaced apart on the first connecting pipe along its length. Each heat dissipation plate has a first surface facing away from the inner wall of the outer cylinder. An angle A exists between the normal of the first surface and the central axis of the outer cylinder, wherein 0° < A < 90°.

[0008] In some embodiments, an airflow channel is formed between the first connecting pipe and the inner wall of the outer cylinder. The airflow channel includes a spiral channel, through which the first connecting pipe passes. A spiral blade is provided on the inner wall of the outer cylinder, and the spiral channel is formed between the spiral blade and the inner wall of the outer cylinder. The first connecting pipe passes through the spiral blade.

[0009] In some embodiments, the air flows in the opposite direction to the water flow in the first connecting pipe, so that the heat exchange medium can exchange heat with the air through the first connecting pipe.

[0010] In some embodiments, the outlet end of the first connecting pipe is provided with a throttling unit, the throttling unit including a throttling element installed in the outlet pipe of the first connecting pipe, or the throttling unit including a throttling port opened at the outlet end of the first connecting pipe.

[0011] In some embodiments, a groove is provided on the inner wall of the outer cylinder along the circumference, the groove matching the spiral blade, and the spiral blade is installed in the groove.

[0012] In some embodiments, one end of the throttling unit is connected to the first connecting pipe, and the other end is connected to the second connecting pipe. The second connecting pipe is connected to an evaporator, and the evaporator is connected to a compressor. The compressor is connected to the water inlet of the first connecting pipe through a third connecting pipe. The throttling unit, the second connecting pipe, the evaporator, the compressor, the third connecting pipe, and the first connecting pipe form a circulation loop.

[0013] In some embodiments, the first connecting pipe is spirally installed on the inner wall of the outer cylinder, and a fixing member is provided on the first connecting pipe. The fixing member is sleeved on the outer peripheral wall of the first connecting pipe and is provided on the inner wall of the outer cylinder.

[0014] In some embodiments, the surface of the first connecting pipe is coated with a corrosion-resistant protective layer, and the surface of the corrosion-resistant protective layer is coated with an antioxidant protective layer.

[0015] The present invention also provides a washer-dryer combo machine, which includes the drum assembly described in any of the preceding claims.

[0016] The drum assembly and washer-dryer combo provided by this invention have the following beneficial effects:

[0017] By installing a first connecting pipe on the inner wall of the outer cylinder, and arranging the first connecting pipe around the circumference of the outer cylinder, the heat exchange between the inner and outer cylinders can be carried out in all directions during the heat exchange process, further increasing the heat exchange area. The heat exchange medium directly exchanges heat with the air in the gap through the first connecting pipe, avoiding the impact of high temperature and high humidity air in the cylinder on the fan and preventing hot air short circuit. The air after heat exchange further exchanges heat with the cleaning material in the inner cylinder, making the cleaning material heated evenly and improving the drying effect of the cleaning material. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the heat pump system in the drum assembly according to an embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the outer cylinder in the roller assembly according to an embodiment of the present invention.

[0020] The reference numerals in the attached figures are as follows:

[0021] 1. Compressor; 2. Third connecting pipe; 3. First connecting pipe; 4. Throttling device; 5. Second connecting pipe; 6. Evaporator; 7. Outer cylinder. Detailed Implementation

[0022] See also Figure 1 and Figure 2 As shown, according to an embodiment of the present invention, a drum assembly is provided, comprising: an inner drum and an outer drum 7, wherein the inner drum is located inside the outer drum 7, and a gap exists between the inner drum and the outer drum 7. A first connecting pipe 3 is disposed on the inner wall of the outer drum 7 along the circumference of the outer drum 7. The first connecting pipe 3 contains a heat exchange medium, which can exchange heat with the air in the gap through the first connecting pipe 3, thereby heat-exchanging the items to be cleaned inside the inner drum. In this technical solution, by providing the first connecting pipe 3 on the inner wall of the outer drum 7, and arranging the first connecting pipe 3 along the circumference of the outer drum 7, the first connecting pipe 3 can exchange heat in all directions between the inner drum and the outer drum 7 during heat exchange, further increasing the heat exchange area. The heat exchange medium directly exchanges heat with the air in the gap through the first connecting pipe 3, avoiding the influence of high-temperature and high-humidity air inside the drum on the fan and preventing hot air short-circuiting. The heat-exchanged air further exchanges heat with the items to be cleaned inside the inner drum, making the items to be heated evenly and improving the drying effect of the items.

[0023] In some embodiments, multiple heat dissipation plates are spaced apart along the length of the first connecting pipe 3. Each heat dissipation plate has a first surface facing away from the inner wall of the outer cylinder 7. The normal to the first surface forms an angle A with the central axis of the outer cylinder 7, where 0° < A < 90°. This technical solution increases the heat exchange area between the first connecting pipe 3 and the air by spaced-apart heat dissipation plates. The heat dissipation plates are installed at an angle, improving the utilization rate of the outer surface of the first connecting pipe 3, thereby increasing the number of heat dissipation plates installed and ensuring effective heat exchange.

[0024] In some embodiments, an airflow channel is formed between the first connecting pipe 3 and the inner wall of the outer cylinder 7. This airflow channel includes a spiral channel through which the first connecting pipe 3 passes. A spiral blade is provided on the inner wall of the outer cylinder 7, forming the spiral channel with the inner wall of the outer cylinder 7. The first connecting pipe 3 passes through the spiral blade. In this technical solution, the spiral channel facilitates rapid flow of high-temperature, high-humidity air into the cylinder towards the first connecting pipe 3, allowing for sufficient heat exchange between the first connecting pipe 3 and the high-temperature, high-humidity air. The spiral blade guides the airflow, improving airflow efficiency and thus enhancing the drying effect. Specifically, a groove is provided on the inner wall of the outer cylinder 7 along its circumference. This groove matches the spiral blade, which is installed within the groove. The groove is spiral-shaped and matches the spiral blade. The spiral blade is installed within the groove, and the spiral angle and pitch of the groove and the spiral blade are consistent, facilitating installation and fixation via the spiral groove and spiral blade.

[0025] In some embodiments, the air flows in the opposite direction to the water flow in the first connecting pipe 3, so that the heat exchange medium can exchange heat with the air through the first connecting pipe 3. In this technical solution, the air flows in the opposite direction to the water flow in the first connecting pipe 3, the high-temperature and high-humidity gas flows from bottom to top, and the water flows from top to bottom, thereby forming a countercurrent flow of hot and cold media, and carrying out heat convection heat exchange.

[0026] In some embodiments, a throttling unit is provided at the water outlet end of the first connecting pipe 3. The throttling unit includes a throttling element 4 installed in the water outlet pipe of the first connecting pipe 3, or the throttling unit includes a throttling port opened at the water outlet end of the first connecting pipe 3. In this technical solution, by providing a throttling unit at the water outlet end of the first connecting pipe 3, the flow velocity of the water in the first connecting pipe 3 is reduced, the heat exchange time between the water flow and the high-temperature and high-humidity gas is increased, ensuring that the high-temperature and high-humidity gas can be effectively heat-exchanged in the first connecting pipe 3, and also facilitating the connection of the first connecting pipe 3 to the drying system of the washer-dryer combo.

[0027] In some embodiments, one end of the throttling unit is connected to the first connecting pipe 3, and the other end is connected to the second connecting pipe 5. The second connecting pipe 5 is connected to an evaporator 6, and the evaporator 6 is connected to a compressor 1. The compressor 1 is connected to the water inlet of the first connecting pipe 3 via a third connecting pipe 2. The throttling unit, the second connecting pipe 5, the evaporator 6, the compressor 1, the third connecting pipe 2, and the first connecting pipe 3 form a circulation loop. In this technical solution, the compressor 1 compresses the refrigerant into a high-temperature, high-pressure gas, which is then discharged into the first connecting pipe 3. The first connecting pipe 3 acts as a condenser. After sufficient heat exchange with the clothes inside the drum in the first connecting pipe 3, the refrigerant becomes a room-temperature, high-pressure liquid. After being throttled by the throttling unit, it becomes a low-temperature, low-pressure gas-liquid mixture, which then enters the evaporator 6. In the evaporator 6, after heat exchange with the high-temperature, high-humidity return air inside the drum, the refrigerant becomes a low-temperature, low-pressure gas and returns to the compressor 1. The throttling unit uses a capillary tube.

[0028] In some embodiments, the first connecting pipe 3 is spirally installed on the inner wall of the outer cylinder 7. A fixing member is provided on the first connecting pipe 3, which is sleeved on the outer peripheral wall of the first connecting pipe 3 and located on the inner wall of the outer cylinder 7. In this technical solution, the spiral installation of the first connecting pipe 3 on the inner wall of the outer cylinder 7 increases the heat exchange area between the first connecting pipe 3 and the air. The fixing member is sleeved on the outer peripheral wall of the first connecting pipe 3 and located on the inner wall of the outer cylinder 7, and is bolted to the inner wall of the outer cylinder 7. The first connecting pipe 3 can be made of copper, which has good thermal conductivity, or other materials with strong thermal conductivity. Specifically, the surface of the first connecting pipe 3 is coated with a corrosion-resistant protective layer, and the surface of the corrosion-resistant protective layer is coated with an anti-oxidation protective layer. The corrosion-resistant protective layer is a wax emulsion coating or a varnish layer, and the anti-oxidation protective layer is a pine resin paint layer. This prevents the first connecting pipe 3 from being soaked in washing water for too long, which could lead to copper rust and oxidation, affecting heat exchange. You can apply varnish to the copper tube part of the first connecting pipe 3 to prevent the copper tube from being soaked in the washing water for too long and developing copper rust, which would affect heat exchange.

[0029] The present invention also provides a washer-dryer combo machine, including the drum assembly described in any of the preceding claims.

[0030] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A drum assembly, characterized by: The application relates to a drum assembly. The drum assembly comprises an inner drum and an outer drum (7), the inner drum is located in the outer drum (7), and a gap is formed between the inner drum and the outer drum (7); a first connecting pipe (3) is arranged on the inner wall of the outer drum (7) along the circumferential direction of the outer drum (7), the first connecting pipe (3) contains heat exchange medium, and the heat exchange medium can exchange heat with air in the gap through the first connecting pipe (3) so as to exchange heat with cleaning objects in the inner drum; A plurality of heat dissipation plates are arranged on the first connecting pipe (3) along the length direction of the first connecting pipe (3), the heat dissipation plates have first surfaces facing away from the inner wall of the outer drum (7), and the normal line of the first surfaces and the central axis of the outer drum (7) form an included angle A, wherein 0 < A < 90 degrees; An air flow channel is formed between the first connecting pipe (3) and the inner wall of the outer drum (7), the air flow channel comprises a spiral flow channel, the first connecting pipe (3) passes through the spiral flow channel, the inner wall of the outer drum (7) is provided with a spiral fin, and the spiral fin and the inner wall of the outer drum (7) form the spiral flow channel, and the first connecting pipe (3) is arranged on the spiral fin; The flowing direction of air in the air flow channel is opposite to the flowing direction of the heat exchange medium in the first connecting pipe (3), so that the heat exchange medium can exchange heat with the air through the first connecting pipe (3); The liquid outlet end of the first connecting pipe (3) is provided with a throttling unit, one end of the throttling unit is connected with the first connecting pipe (3), the other end of the throttling unit is connected with a second connecting pipe (5), the second connecting pipe (5) is connected with an evaporator (6), the evaporator (6) is connected with a compressor (1), the compressor (1) is connected with the liquid inlet end of the first connecting pipe (3) through a third connecting pipe (2), and the throttling unit, the second connecting pipe (5), the evaporator (6), the compressor (1), the third connecting pipe (2) and the first connecting pipe (3) form a circulation loop.

2. The drum assembly of claim 1, wherein: Grooves are arranged on the inner wall of the outer drum (7) along the circumferential direction of the outer drum (7), the grooves are matched with the spiral fins, and the spiral fins are arranged in the grooves.

3. The drum assembly of claim 1, wherein: The throttling unit comprises a throttling piece (4) arranged on the liquid outlet pipe of the first connecting pipe (3), or the throttling unit comprises a throttling opening arranged on the liquid outlet end of the first connecting pipe (3).

4. The drum assembly of claim 1, wherein: The first connecting pipe (3) is arranged on the inner wall of the outer drum (7) in a spiral shape, the first connecting pipe (3) is provided with a fixing piece, the fixing piece is arranged on the outer peripheral wall of the first connecting pipe (3), and the fixing piece is arranged on the inner wall of the outer drum (7).

5. The drum assembly of claim 1, wherein: A corrosion-resistant protective layer is arranged on the surface of the first connecting pipe (3), and an antioxidant protective layer is arranged on the surface of the corrosion-resistant protective layer.

6. A washer-dryer, characterized by: The drum assembly comprises the drum assembly in any one of claims 1-5. The drum assembly comprises the drum assembly in any one of claims 1-5.

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