Clothes dryer and control method thereof

Abstract

The application discloses a clothes dryer and a control method thereof. The clothes dryer comprises a condenser, a circulating pipeline, an auxiliary condensing device and a refrigerating device. The condenser has a condensing channel, and a condensing medium is arranged in the condensing channel to condense air in a drying channel of the clothes dryer. The circulating pipeline is in communication with liquid inlets and outlets of the condensing channel. The auxiliary condensing device is in communication with the circulating pipeline and is used for heat exchange with the air to reduce the temperature of the condensing medium in the circulating pipeline. The refrigerating device is arranged outside the circulating pipeline and is used for reducing the temperature of the condensing medium in the circulating pipeline. The condensing medium in the condenser is guided out through the circulating pipeline, and the condensing medium is transported back into the condenser after being cooled by the auxiliary condensing device and the refrigerating device. The temperature of the condensing medium can be greatly reduced, the clothes drying efficiency of the clothes dryer is improved, the clothes drying energy consumption is reduced, and a larger space in the drying channel is not occupied.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of clothes drying, in particular, relates to a clothes dryer and a control method thereof. BACKGROUND

[0002] In the prior art, the condensing clothes dryer has a condenser in the circulating air duct, and will not emit moisture to the surrounding environment during operation, and has a small impact on the surrounding environment during fast drying, and is therefore deeply loved by people. The working principle of the condensing clothes dryer is that the motor drives the fan to rotate to make the air flow in a closed air duct in a directional circulation, the clothes are placed in the drum of the clothes dryer after being washed and dewatered, the air is heated by the heating element and then enters the drum, exchanges heat with the rolling and shaking clothes, and then carries away the water vapor, the moisture in the humid air is cooled down by the condenser, the cooling water is pumped to the water storage box by the water pump, and the air continues to flow to the heating element, is heated and then enters the drum, and the cycle is repeated to continuously carry away the moisture on the clothes until drying. However, the condensing effect of the existing condenser is limited, and the clothes drying efficiency is low, and the clothes drying efficiency is improved by increasing the volume of the condenser or setting an auxiliary condensing device.

[0003] To solve the above problems, the auxiliary condensing device is provided to condense the humid and hot air in the drying channel, and a cooling device is needed to cool the auxiliary condensing device, but the existing auxiliary condensing device has limited auxiliary cooling capacity, large power consumption, and large space occupation in the air duct.

[0004] Therefore, the present application is proposed. SUMMARY

[0005] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and the purpose is to provide a clothes dryer which can use an auxiliary condensing device and a refrigeration device to cool the condensing medium in the condenser, achieve fast condensation of the condenser, improve the clothes drying efficiency, and reduce the energy consumption of the clothes dryer.

[0006] Another purpose of the present application is to provide a control method of the clothes dryer.

[0007] To solve the above technical problems, the basic idea of the technical solution of the present application is to provide a clothes dryer, which comprises,

[0008] a condenser, the condenser having a condensing channel, and a condensing medium being arranged in the condensing channel for condensing the air in the drying channel of the clothes dryer;

[0009] a circulating pipeline, two ends of the circulating pipeline being communicated with the liquid inlet and the liquid outlet of the condensing channel respectively, for guiding the circulation of the condensing medium;

[0010] an auxiliary condensing device, the auxiliary condensing device being communicated with the circulating pipeline, for heat exchange with the air to reduce the temperature of the condensing medium in the circulating pipeline;

[0011] A refrigeration device is arranged outside the circulation pipeline and is used to reduce the temperature of the condensing medium in the circulation pipeline.

[0012] The condenser of the present application can condense the air in the drying channel, the condensing medium in the condenser is guided out through the circulation pipeline, and the condensing medium is transported back into the condenser after being cooled by the auxiliary condensing device and the refrigeration device. The auxiliary condensing device and the refrigeration device cooperate with the condenser through the circulation pipeline, which can greatly reduce the temperature of the condensing medium, improve the drying efficiency of the clothes dryer, reduce the energy consumption of drying clothes, and does not need to occupy a large space in the drying channel.

[0013] Further, the refrigeration device is arranged on one end of the circulation pipeline close to the liquid inlet of the condenser, and the auxiliary condensing device is arranged on one end of the circulation pipeline close to the liquid outlet of the condenser.

[0014] Preferably, a circulating pump is further arranged in the circulation pipeline to drive the flow of the condensing medium in the circulation pipeline.

[0015] Further, the refrigeration device comprises a semiconductor condensing device, and the semiconductor condensing device further comprises a shell arranged outside the cold end of the semiconductor condensing device; and the circulation pipeline is arranged in the shell.

[0016] Further, the cold end of the semiconductor condensing device is arranged in contact with the outer peripheral wall of the circulation pipeline.

[0017] Further, the condenser has a plurality of condensing plates arranged at intervals, and each of the plurality of condensing plates has a condensing channel; the plurality of condensing plates are arranged in air heat exchange to reduce the temperature of the condensing medium in the condensing channel.

[0018] The plurality of condensing channels are arranged in parallel, and the liquid inlets and outlets of the plurality of condensing channels are respectively communicated with two ends of the circulation pipeline.

[0019] Further, the auxiliary condensing device comprises

[0020] a plurality of flow channels connected in parallel in the circulation pipeline;

[0021] a plurality of heat dissipation fins arranged outside the flow channels and used for air heat exchange to reduce the temperature of the condensing medium in the plurality of flow channels;

[0022] a fan, and an air outlet of the fan is arranged towards the heat dissipation fins and / or the condenser.

[0023] The present application also provides a control method of the clothes dryer, comprising the following steps,

[0024] S1, controlling the clothes dryer to start drying;

[0025] S2, acquiring whether the temperature T1 in the drying drum is greater than or equal to a first preset temperature Ta, and if yes, controlling the condensing medium to circulate;

[0026] S3, acquiring whether the ambient temperature T2 is greater than or equal to a second preset temperature value Tb, and if yes, controlling the refrigeration device to work to refrigerate.

[0027] Further, the step S2 comprises the following steps:

[0028] S21, detecting the temperature T1 in the drying drum;

[0029] S22, judging whether the temperature T1 in the drying drum is greater than or equal to the first preset temperature value Ta, and if yes, controlling the condensing medium to circulate; and if no, executing the step S21.

[0030] Further, if the step S2 is judged as yes, the step S3 comprises the following steps:

[0031] S31, detecting the ambient temperature T2;

[0032] S32, judging whether the ambient temperature T2 is greater than or equal to the second preset temperature Tb, and if yes, controlling the refrigeration device to start working to refrigerate until the drying ends.

[0033] Further, in the step S3, the second preset temperature value Tb ranges from 35℃ to 45℃.

[0034] After the above technical solution is adopted, the present application has the following beneficial effects compared with the prior art.

[0035] (1) The condenser of the present application can condense the air in the drying channel, and the condensing medium in the condenser is guided out through the circulating pipeline, and is delivered back into the condenser after being cooled by the auxiliary condensing device and the refrigeration device. The auxiliary condensing device can exchange heat with the air, thereby reducing the temperature of the condensing medium in the circulating pipeline, and thus reducing the temperature of the condensing medium in the condenser, and improving the drying efficiency of the clothes dryer. By setting the refrigeration device, the refrigeration device can be controlled to exchange heat with the condensing medium in the circulating pipeline, thereby further reducing the temperature of the condensing medium in the circulating pipeline, and further improving the drying efficiency of the clothes dryer. The auxiliary condensing device and the refrigeration device cooperate with the condenser through the circulating pipeline, which can greatly reduce the temperature of the condensing medium, improve the drying efficiency of the clothes dryer, reduce the drying energy consumption, and does not need to occupy a larger space in the drying channel.

[0036] (2) By setting the auxiliary condensing device on one end of the circulation pipeline near the liquid outlet of the condenser, the present invention can initially cool the condensing medium flowing out of the condenser. If the temperature of the condensing medium after the initial cooling is still high, the refrigeration device can further cool the condensing medium to ensure that the condensing medium flowing back into the condenser has a lower temperature, thereby improving the condensing efficiency of the condenser, thus improving the drying efficiency of the dryer and reducing the drying cost.

[0037] (3) During the drying process of the present invention, when the temperature inside the drying drum reaches the first preset temperature Ta, the flow of the condensing medium in the circulation pipeline is controlled, which can reduce the temperature of the condensing medium and improve the drying efficiency. When the ambient temperature reaches the second preset temperature Tb, the heat exchange efficiency between the auxiliary condensing device and the air may be low, and the temperature of the condensing medium cannot be effectively reduced. Controlling the refrigeration device to start refrigeration can effectively reduce the temperature of the condensing medium, improve the drying efficiency of the dryer, avoid the energy waste caused by starting the refrigeration device at the beginning of drying, and reduce the drying cost of the dryer.

[0038] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0039] The accompanying drawings, as part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0040] Figure 1 This is a schematic diagram of a clothes dryer according to the present invention;

[0041] Figure 2 This is a schematic diagram of the connection of a circulation pipeline according to the present invention;

[0042] Figure 3 This is a schematic diagram of a condenser according to the present invention;

[0043] Figure 4 This is the present invention. Figure 3 A cross-sectional schematic diagram;

[0044] Figure 5 This is a schematic diagram of a condenser plate according to the present invention;

[0045] Figure 6 This is a flowchart of a dryer control method according to the present invention;

[0046] Figure 7 This is a flowchart of a clothes dryer control method according to the present invention.

[0047] In the diagram: 1. Cabinet; 11. Opening; 12. Frame; 2. Drying drum; 21. Clothes inlet; 22. Sliding cover; 3. Condenser; 31. Condensing plate; 32. Condensation channel; 33. Liquid inlet; 34. Liquid outlet; 35. Air duct; 4. Circulation pipeline; 41. Circulation pump; 5. Auxiliary condensing device; 51. Flow channel; 6. Semiconductor condensing device; 61. Cover; 7. Front panel; 71. Receiving cavity; 72. Lint filter; 73. Auxiliary heater; 8. Drying air duct structure; 81. Main fan; 82. Main heater; 9. Drive motor.

[0048] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0050] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0051] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] like Figures 1 to 5 As shown, the dryer of the present invention includes a condenser 3, a circulation pipeline 4, an auxiliary condensation device 5, and a refrigeration device.

[0053] The condenser 3 has a condensation channel 32 containing a condensing medium for condensing the air in the drying channel of the dryer. The two ends of the circulation pipe 4 are connected to the inlet 33 and outlet 34 of the condensation channel 32, respectively, to guide the circulation of the condensing medium. The auxiliary condensing device 5 is connected to the circulation pipe 4 and exchanges heat with the air to reduce the temperature of the condensing medium in the circulation pipe 4. The refrigeration device is located outside the circulation pipe 4 to further reduce the temperature of the condensing medium within it.

[0054] The condenser 3 of this invention can condense the air in the drying channel. The condensing medium in the condenser 3 is discharged through the circulation pipe 4. After the condensing medium is cooled by the auxiliary condensing device 5 and the refrigeration device, it is transported back to the condenser 3. The auxiliary condensing device 5 can exchange heat with the air, reducing the temperature of the condensing medium in the circulation pipe 4, thereby reducing the temperature of the condensing medium in the condenser 3 and improving the drying efficiency of the dryer. By setting the refrigeration device, the refrigeration of the refrigeration device and the heat exchange of the condensing medium in the circulation pipe 4 can be controlled, further reducing the temperature of the condensing medium in the circulation pipe 4 and further improving the drying efficiency of the dryer. The auxiliary condensing device 5 and the refrigeration device cooperate with the condenser 3 through the circulation pipe 4 to greatly reduce the temperature of the condensing medium, improve the drying efficiency of the dryer, reduce drying energy consumption, and do not require a large space in the drying channel.

[0055] Preferably, the condenser 3 is disposed within the drying channel of the dryer. The circulation pipe 4 contains a condensing medium. The refrigeration end of the refrigeration device is disposed close to the outer peripheral wall of the circulation pipe 4. The refrigeration device is disposed at the end of the circulation pipe 4 near the liquid inlet 33 of the condenser 3, and the auxiliary condensing device 5 is disposed at the end of the circulation pipe 4 near the liquid outlet 34 of the condenser 3.

[0056] This invention, by placing an auxiliary condensing device 5 on one end of the circulation pipeline 4 near the liquid outlet 34 of the condenser 3, can initially cool the condensing medium flowing out of the condenser 3. If the temperature of the condensing medium is still high after the initial cooling, it can be further cooled by the refrigeration device, thereby reducing the temperature of the condensing medium entering the condenser 3, improving the condensing efficiency of the condenser 3, thereby improving the drying efficiency of the dryer and reducing the drying cost.

[0057] Preferably, the condenser 3 is disposed in the drying channel. The circulation pipe 4 passes through the drying channel. The auxiliary condensing device 5 and the refrigeration device are disposed outside the drying channel, which can improve the heat exchange efficiency.

[0058] Furthermore, the drying channel includes a receiving cavity 71 for accommodating the lint filter 72 and a drying air passage structure 8 disposed inside the dryer housing 1. The air inlet of the receiving cavity 71 is connected to the front end of the drying drum 2, and the air outlet of the receiving cavity 71 is connected to the drying air passage structure 8. The drying air passage structure 8 is connected to the rear end of the drying drum 2.

[0059] Preferably, the condenser 3 is disposed within the drying air duct structure 8. The circulation pipe 4 passes through the drying air duct structure 8. The auxiliary condensing device 5 and the refrigeration device are disposed outside the drying air duct structure 8.

[0060] The dryer also includes a drying drum 2, a front panel 7, a frame 12, and a drive motor 9.

[0061] The front of the housing 1 has an opening 11, which can be closed or opened by a front panel 7. A frame 12 is disposed inside the housing 1 and connected to the front panel 7 to form an installation space. A clothes dryer 2 is disposed within the installation space, and its rear end is rotatably supported on the rear end of the frame 12. A drive motor 9 is disposed on the rear side wall of the frame 12.

[0062] The clothes drying drum 2 has a clothes inlet 21 on its peripheral wall, and a sliding cover 22 is provided on the clothes drying drum 2 to close or open the clothes inlet 21. After the clothes drying drum 2 extends outside the box body 1, the user can take out and put in clothes through the clothes inlet 21 without having to bend over.

[0063] The frame 12 can move inward and outward through the opening 11, causing the clothes inlet 21 of the clothes dryer 2 to extend to the outside of the box 1, or causing the clothes inlet 21 of the clothes dryer 2 to retract into the box 1.

[0064] The receiving cavity 71 is disposed inside the front side plate 7, below the opening of the drying drum 2. The air inlet of the receiving cavity 71 is located at the top, and the air outlet of the receiving cavity 71 is located at the rear.

[0065] The drying airflow structure 8 is located below the drying drum 2. The front end of the drying airflow structure 8 is detachably connected to the air outlet of the receiving cavity 71.

[0066] The circulation pipeline 4, the auxiliary condensing device 5, and the refrigeration device are located above the condenser 3.

[0067] The rear end of the drying air path structure 8 is also equipped with a main fan 81 and a main heater 82.

[0068] The front panel 7 closes the opening of the drying drum 2, and an air inlet / outlet structure is provided on the front panel 7 opposite to the opening. An auxiliary heater 73 is provided inside the front panel 7 opposite to the opening to heat the incoming air. The heated air enters the drying drum 2 through the air inlet / outlet structure to dry clothes.

[0069] like Figures 1 to 2 As shown, the dryer also includes a circulation pump 41, which is installed in the circulation pipeline 4 to drive the flow of the condensing medium in the circulation pipeline 4 and accelerate the heat dissipation of the condensing medium in the circulation pipeline 4.

[0070] Preferably, the circulation pump 41 is installed on the circulation pipeline 4 outside the drying channel.

[0071] Furthermore, the refrigeration device includes a semiconductor condenser 6, the cold end of which is attached to the outer peripheral wall of the circulation pipe 4, which can increase the heat exchange between the cold end of the semiconductor condenser 6 and the condensing medium in the circulation pipe 4.

[0072] The semiconductor condenser 6 also includes a housing 61, which covers the outside of the cold end of the semiconductor condenser 6. The circulation pipe 4 passes through the housing 61.

[0073] By providing a cover 61 outside the cold end of the semiconductor condenser 6, and passing through the cover 61 to exchange heat with the cold air inside the cover 61, the cold air around the cold end of the semiconductor condenser 6 can be prevented from exchanging heat with the outside, thereby further improving the heat exchange efficiency between the cold end of the semiconductor condenser 6 and the condensing medium in the circulation pipe 4 and reducing the temperature of the condensing medium in the circulation pipe 4.

[0074] Preferably, the circulation pipe 4 enters the housing 61 from one end and exits from the other end of the housing 61. The circulation pipe 4 extends in close contact with the cold end of the semiconductor condensation device 6.

[0075] Preferably, the semiconductor condenser 6 is disposed within the drying airflow structure 8. The hot end of the semiconductor condenser 6 is located inside the drying airflow structure 8, on the air outlet side of the condenser 3, and can be used to preheat the air. The cold end of the semiconductor condenser 6 is located outside the drying airflow structure 8.

[0076] like Figures 3 to 5The condenser 3 has a plurality of spaced-apart condensing plates 31, each of which has a condensing channel 32. The condensing plates 31 exchange heat with air to reduce the temperature of the condensing medium in the condensing channels 32. The condensing channels 32 are arranged in parallel, and the liquid inlet 33 and liquid outlet 34 of the condensing channels 32 are respectively connected to both ends of the circulation pipeline 4.

[0077] The plurality of condensing plates 31 are arranged at intervals to form an air duct 35. As the air flows in the air duct 35, it carries away the heat on the condensing plates 31, realizing the heat exchange between the air and the condensing plates 31. The condensing medium flows in the condensing channel 32. The condensing plates 31 can carry away the heat of the condensing medium in the condensing channel 32, thereby reducing the temperature of the condensing medium. A large amount of condensing medium is not required to condense and dry the air in the channel.

[0078] Preferably, the plurality of condenser plates 31 are arranged horizontally and spaced apart along the vertical direction.

[0079] The auxiliary condensation device 5 includes several flow channels 51 (see reference). Figure 2 ), heat dissipation fins (not shown in the figure) and fan (not shown in the figure).

[0080] The plurality of flow channels 51 are connected in parallel within the circulation pipe 4. The heat dissipation fins are disposed on the outside of the flow channels 51 for heat exchange with air to reduce the temperature of the condensing medium within the plurality of flow channels 51. The air outlet of the fan is oriented toward the heat dissipation fins and / or the condenser 3.

[0081] The fan can accelerate the heat dissipation of the heat dissipation fins and also blow air into the air duct 35 between the condensing plates 31 to accelerate the heat dissipation of the condensing plates 31, reduce the temperature of the condensing medium, and improve the condensing efficiency of the condenser 3.

[0082] The heat dissipation fins are respectively disposed on the outer peripheral walls of the plurality of flow channels 51.

[0083] Preferably, the condenser 3 includes a blown plate condenser 3. The auxiliary condensation device 5 includes a finned heat exchanger. The circulation pump 41 includes a water pump.

[0084] The condensing medium can be water, glycerol, ethylene glycol, or similar types. Preferably, the condensing medium is water.

[0085] This invention uses a water pump to circulate the condensing medium through the condenser 3, auxiliary condenser 3, and circulation pipe 4. Heat is dissipated through the condensing medium and then cooled in a finned heat exchanger. When the drying efficiency is low, the semiconductor condenser 6 can be controlled to operate for cooling, exchanging heat with the condensing medium in the circulation pipe 4 to further cool the condensing medium, thereby reducing the temperature of the condensing medium entering the condenser 3 and achieving rapid condensation.

[0086] like Figures 6 to 7 As shown, the present invention also provides a control method for a clothes dryer having any of the above-described features, comprising the following steps:

[0087] S1: Control the dryer to start drying;

[0088] S2. Check if the temperature T1 inside the dryer is greater than or equal to the first preset temperature Ta. If so, control the circulation of the condensing medium.

[0089] S3. Check if the ambient temperature T2 is greater than or equal to the second preset temperature value Tb. If so, control the refrigeration device to work and refrigerate.

[0090] In the drying process of this invention, when the temperature inside the drying drum reaches the first preset temperature Ta, the flow of the condensing medium in the circulation pipeline is controlled to reduce the temperature of the condensing medium and improve the drying efficiency. When the ambient temperature reaches the second preset temperature Tb, the heat exchange efficiency between the auxiliary condensing device and the air may be low, and the temperature of the condensing medium cannot be effectively reduced. Controlling the refrigeration device to start cooling can effectively reduce the temperature of the condensing medium, improve the drying efficiency of the dryer, avoid energy waste caused by starting the refrigeration device at the beginning of drying, and reduce the drying cost of the dryer.

[0091] In step S1, drying begins. The main heater heats the air, and the main fan starts, circulating the air within the drying channel to guide the hot air into the drying drum to dry the clothes. Then, the hot and humid air is discharged from the drying drum and cooled and condensed by the condenser.

[0092] In step S3, the ambient temperature T2 can be the ambient temperature outside the dryer, the ambient temperature around the circulation pipes inside the dryer, or the ambient temperature around the refrigeration device inside the dryer. The refrigeration device is a semiconductor condenser.

[0093] like Figure 7 The step S2 includes the following steps:

[0094] S21. Detect the temperature T1 inside the clothes dryer;

[0095] S22. Determine whether the temperature T1 inside the dryer is greater than or equal to the first preset temperature value Ta. If yes, control the circulation of the condensing medium; otherwise, execute step S21.

[0096] In step S22, the condensate in the circulation pipeline is circulated by controlling the start of the circulation pump.

[0097] If the determination in step S2 is yes, then the circulation of the condensing medium is controlled, and step S3 includes the following steps:

[0098] S31. Detect ambient temperature T2;

[0099] S32. Determine whether the ambient temperature T2 is greater than or equal to the second preset temperature Tb. If so, control the refrigeration device to start working and refrigerate until the drying is finished.

[0100] When the ambient temperature T2 is higher than the second preset temperature Tb, the refrigeration device is controlled to work and cool, which can further reduce the temperature of the condensing medium, ensure the condensing efficiency of the condenser, improve the drying efficiency of the dryer, and reduce the drying cost.

[0101] In step S3, the range of the second preset temperature value Tb is 35℃≤Tb≤45℃. Preferably, the second preset temperature value Tb is 40℃.

[0102] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. The implementation schemes in the above embodiments can also be further combined or replaced. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A clothes dryer, characterized in that: include, A condenser having a condensation channel containing a condensing medium for condensing air in the drying channel of a clothes dryer; The circulation pipeline is connected at both ends to the liquid inlet and liquid outlet of the condensation channel, respectively, to guide the condensation medium to circulate. An auxiliary condensing device, connected to the circulation pipeline, is used to exchange heat with the air to reduce the temperature of the condensing medium in the circulation pipeline; A refrigeration device is installed outside the circulation pipeline to reduce the temperature of the condensing medium inside the circulation pipeline. The refrigeration device includes a semiconductor condenser, which also includes a housing covering the outside of the cold end of the semiconductor condenser, with circulation pipes passing through the housing. The drying channel includes a drying air path structure set inside the dryer's housing, a condenser set inside the drying air path structure, a circulation pipe passing through the drying air path structure, a hot end of a semiconductor condenser located inside the drying air path structure and on the air outlet side of the condenser, and a cold end of the semiconductor condenser located outside the drying air path structure.

2. A clothes dryer according to claim 1, characterized in that: The refrigeration device is located at one end of the circulation pipeline near the liquid inlet of the condenser, and the auxiliary condensation device is located at one end of the circulation pipeline near the liquid outlet of the condenser.

3. A clothes dryer according to claim 2, characterized in that, It also includes a circulation pump, which is installed in the circulation pipeline to drive the flow of condensate in the circulation pipeline.

4. A clothes dryer according to claim 3, characterized in that: The cold end of the semiconductor condenser is fitted to the outer peripheral wall of the circulation pipeline.

5. A clothes dryer according to any one of claims 1-4, characterized in that: The condenser has a plurality of spaced-apart condensing plates, each of which has a condensing channel. The plurality of condensing plates exchange heat with the air to reduce the temperature of the condensing medium in the condensing channel. The plurality of condensation channels are arranged in parallel, and the liquid inlet and liquid outlet of the plurality of condensation channels are respectively connected to the two ends of the circulation pipeline.

6. A clothes dryer according to any one of claims 1-4, characterized in that: The auxiliary condensation device includes Several flow channels are connected in parallel in the circulation pipeline; Heat dissipation fins are disposed outside the flow channels to exchange heat with the air and reduce the temperature of the condensing medium in the flow channels. A fan, wherein the air outlet of the fan is positioned toward the heat dissipation fins and / or the condenser.

7. A control method for a clothes dryer according to any one of claims 1-6, characterized in that: Includes the following steps, S1: Control the dryer to start drying; S2. Check if the temperature T1 inside the dryer is greater than or equal to the first preset temperature Ta. If so, control the circulation of the condensing medium. S3. Check if the ambient temperature T2 is greater than or equal to the second preset temperature value Tb. If so, control the refrigeration device to work and refrigerate.

8. The control method according to claim 7, characterized in that: Step S2 includes the following steps: S21. Detect the temperature T1 inside the clothes dryer; S22. Determine whether the temperature T1 inside the dryer is greater than or equal to the first preset temperature value Ta. If yes, control the circulation of the condensing medium; otherwise, execute step S21.

9. The control method according to any one of claims 7-8, characterized in that: If the determination in step S2 is yes, then step S3 includes the following steps: S31, Detect ambient temperature T2; S32. Determine whether the ambient temperature T2 is greater than or equal to the second preset temperature Tb. If so, control the refrigeration device to start working and refrigerate until the drying is finished.

10. The control method according to claim 7, characterized in that: In step S3, the range of the second preset temperature value Tb is 35℃≤Tb≤45℃.

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