A condensing system of a clothes dryer, a clothes dryer and a control method thereof

Abstract

The application discloses a clothes dryer condensing system, a clothes dryer and a control method thereof. The condensing system comprises a water collecting part arranged below a circulating air duct and used for collecting condensed water in the circulating air duct, and a water tank in communication with the water collecting part and used for storing the condensed water discharged from the water collecting part. The water tank is in communication with the circulating air duct through an air guide part. The air guide part introduces part of the hot and humid circulating air into the water tank, and the hot and humid circulating air is discharged after being cooled by the condensed water. The water tank is provided with a first water level sensor and a second water level sensor. The two sensors are arranged at positions corresponding to a first water level threshold and a second water level threshold respectively. When the water level in the water tank is lower than the first water level threshold or reaches the second water level threshold, an alarm is sent to the user. When the water level in the water tank returns to the water level threshold range, the alarm is ended. Through the above scheme, the circulating air entering the water tank is fully condensed, the influence on the external environment of the clothes dryer is avoided, and the condensed water is prevented from overflowing into the circulating air duct to affect the drying effect.

Description

Technical Field

[0001] This invention belongs to the field of dryer technology, and specifically relates to a dryer condensation system, a dryer, and a control method thereof. Background Technology

[0002] As a household appliance that can quickly dry clothes, clothes dryers allow people to wear dry and comfortable clothes even in humid weather, reduce the space required for drying clothes, and improve people's quality of life. Therefore, clothes dryers are becoming increasingly popular among users.

[0003] With the increasing use of clothes dryers, users have placed higher demands on the drying speed and energy consumption of clothes dryers. Therefore, current improvements to clothes dryers mainly focus on how to increase the drying speed while controlling the energy consumption of clothes dryers.

[0004] To address this issue, Chinese invention patent application CN201510489302.4 discloses a pre-cooling device for a heat pump dryer, including a spray device located between the evaporator inlet and the drying chamber to spray and cool the air duct. The spray device includes a first water pump, a spray head, and a water pipe. The first water pump extracts condensate from the water collection tray and sprays it into the air duct through the spray head to achieve spray cooling of the circulating air in the air duct. Although the above solution improves the condensation effect by reusing the condensate of the dryer, the condensate remaining in the air duct may lead to increased humidity in the air duct, which is not conducive to the smooth drying process. Furthermore, the water collection tray is located near the circulating air duct and is easily affected by the high temperature around the circulating air duct, resulting in a reduction in the condensation effect of the condensate.

[0005] In view of this, the present invention is proposed. Summary of the Invention

[0006] One of the objectives of this invention is to provide a condensation system for a clothes dryer that addresses the problems in the prior art. By guiding a portion of the hot and humid circulating air to a water tank away from the circulating air duct for condensation, the high temperature around the air duct is avoided from affecting the temperature of the condensate in the water tank, thus improving the condensation effect.

[0007] Another object of the present invention is to provide a clothes dryer having the above-mentioned condensation system, which reduces the workload of the cooling device in the circulating air duct by guiding part of the circulating air to the water tank for cooling, thereby improving the drying efficiency without increasing the energy consumption of the clothes dryer.

[0008] Another object of the present invention is to provide a control method for a clothes dryer, which avoids the problem of insufficient or excessive condensate in the water tank, which would prevent the circulating air from being cooled properly, by controlling the water level in the water tank within a preset water level threshold range.

[0009] To achieve the above objectives, a first aspect of the present invention provides a dryer condensation system, comprising a circulating air duct;

[0010] A water collection section is located below the circulating air duct and is used to collect condensate generated in the circulating air duct during the drying process.

[0011] A water tank, located inside the dryer away from the circulating air duct, is used to store condensate discharged from the water collection section;

[0012] The air guide section has one end connected to the circulating air duct and the other end connected to the water tank, and is used to guide part of the hot and humid circulating air in the circulating air duct to the water tank for cooling.

[0013] In the above solution, the hot and humid circulating air in the circulating air duct is diverted by the air guide, and part of the hot and humid circulating air is guided to the water tank far away from the circulating air duct for condensation. Since the heat of the hot and humid air introduced into the circulating air duct and the heat generated by the heating device will be released to the outside through the circulating air duct, placing the water tank far away from the circulating air duct can avoid the heat released by the circulating air duct from affecting the temperature of the condensate in the water tank, thereby achieving sufficient condensation of the circulating air and improving the cooling effect.

[0014] Furthermore, the water tank includes,

[0015] The water tank body stores the condensate discharged from the water collection section;

[0016] A water level sensor is installed inside the water tank and is connected to the computer board of the dryer to obtain water level information in the water tank and send corresponding signals to the computer board based on the water level information.

[0017] Furthermore, the water level sensor includes,

[0018] The first water level sensor is located inside the water tank and is used to send a corresponding signal to the computer board when the water level in the water tank is lower than the setting position of the first sensor.

[0019] The distance between the first water level sensor and the bottom of the water tank is not zero.

[0020] In the above scheme, the distance between the first water level sensor and the bottom of the water tank is not zero, so as to avoid insufficient condensate in the water tank, which would prevent the circulating air from being condensed smoothly.

[0021] Preferably, the distance from the first water level sensor to the bottom of the water tank is 1 / 5 of the height of the water tank.

[0022] Furthermore, the air guide unit communicates with the water tank from the top, and the water level sensor also includes...

[0023] The second water level sensor is spaced apart from the first water level sensor and located above the first water level sensor. It is used to send a corresponding signal to the computer board when the water level in the water tank reaches the set position of the second water level sensor.

[0024] The distance between the second water level sensor and the top of the water tank is not zero.

[0025] In the above solution, the air guide is connected to the water tank from the top, which avoids the water pressure in the water tank being too high, which would prevent the circulating air from entering the water tank smoothly. It also prevents too much condensate in the water tank from overflowing from the top and entering the air duct along the air guide, thus affecting the drying effect.

[0026] Preferably, the distance from the second water level sensor to the top of the water tank is 1 / 8 of the height of the water tank.

[0027] The above-mentioned preferred solution is a relatively optimal solution derived by technical personnel based on extensive research. It can ensure the smooth entry of circulating air and the sufficient condensation of circulating air while storing a large amount of condensate in the water tank.

[0028] Furthermore, the water tank also includes,

[0029] The water supply pipe connects the water tank to the dryer's water inlet pipe.

[0030] The water inlet valve, which is connected to the computer board, is located on the water supply pipe.

[0031] In the above scheme, the water tank is connected to the water inlet pipe through a water replenishment pipe, which can quickly replenish the condensate when there is little condensate in the water tank, thus avoiding insufficient condensation of the circulating air due to insufficient condensate.

[0032] A second aspect of the present invention provides a clothes dryer having the above-described condensation system.

[0033] A third aspect of the present invention provides a control method for the above-mentioned dryer, specifically comprising:

[0034] The system acquires real-time water level information in the water tank during the drying process and controls the water level in the tank to remain within a preset water level threshold range based on this information.

[0035] The above solution controls the water level in the water tank to always be within the preset water level threshold range during the drying process. This avoids insufficient condensate water from failing to fully condense the circulating air, while also preventing excessive condensate water from flowing back into the circulating air duct and affecting the drying efficiency, thus improving the stability of the dryer's operation.

[0036] Specifically, the water level information in the water collection box is acquired in real time during the drying process and defined as the first parameter;

[0037] The water level threshold range includes,

[0038] The first water level threshold is the setting position of the first water level sensor;

[0039] An alarm is triggered when the first parameter is lower than the first water level threshold. The alarm ends when the user adds water to the water tank or the dryer automatically adds water to the water tank until the first parameter reaches the first water level threshold.

[0040] Furthermore, the water level threshold range also includes,

[0041] The second water level threshold is the setting position of the second water level sensor;

[0042] When the first parameter reaches the second water level threshold, an alarm is issued to remind the user that the water level is too high. The user then drains the water from the tank, or the dryer automatically drains the water until the first parameter is below the second water level threshold, at which point the alarm ends.

[0043] When the water level in the tank reaches a specific height and triggers the corresponding water level sensor, the computer board receives the signal sent by the triggered water level sensor and performs different actions accordingly, thus improving the intelligence level of the dryer.

[0044] Alternatively, as an alternative to the above solution, a suspended body can be installed inside the water tank, and the corresponding sensor can be triggered according to the suspension height of the suspended body.

[0045] Alternatively, the sensor can directly acquire the water level in the tank and send it directly to the computer board. The computer board then compares the water level with the preset water level threshold information to determine the next steps.

[0046] Furthermore, if the first parameter is not within the preset water level threshold range, the drying process is paused; if the first parameter is restored to the preset water level threshold range, the drying process continues.

[0047] The above solution pauses the drying process when the water level is too high or too low. This prevents the circulating air from being discharged outside the dryer before it is sufficiently cooled, thus avoiding the impact on the external environment. It also prevents condensate from overflowing into the circulating air duct and affecting the drying efficiency. This ensures that the dryer always operates in a stable state, reducing drying energy consumption and improving drying efficiency.

[0048] The beneficial effects of the above scheme are as follows:

[0049] 1. The hot and humid circulating air in the circulating air duct is diverted, and part of it is introduced into the water tank for condensation before being discharged. This reduces the load on the cooling device inside the dryer, improves drying efficiency, and avoids the high temperature of the discharged circulating air from affecting the external environment of the dryer.

[0050] 2. The water tank is positioned far from the circulating air duct to prevent heat escaping from the surrounding area from affecting the temperature of the condensate in the water tank, thus allowing the condensate to more effectively cool the circulating air.

[0051] 3. During the drying process, the water level of the condensate in the water tank is controlled within the preset water level threshold range to avoid the water level in the water tank being too low to fully condense the circulating air, and also to prevent too much condensate from overflowing into the circulating air duct, which would affect the drying efficiency.

[0052] 4. When the water level in the water tank is not within the preset water level threshold range, the drying process will be paused to prevent the dryer from running continuously in a high power consumption state, which would lead to increased energy consumption and damage to the dryer. It would also prevent the water tank from failing to adequately cool the circulating air, which would cause the external ambient temperature of the dryer to rise and reduce the user experience. Attached Figure Description

[0053] Figure 1 This is a schematic diagram of the first structure of the condenser system of the dryer described in this invention.

[0054] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0055] Figure 3 This is a schematic diagram of a second structure of the condenser system of the dryer described in this invention.

[0056] Figure 4 This is a simplified flowchart of the control method for the clothes dryer described in this invention.

[0057] Figure 5 This is a more detailed flowchart of the control method for the clothes dryer described in this invention.

[0058] In the diagram: 1. Circulating air duct; 2. Water collection section; 3. Water tank; 4. Air guide section; 5. One-way valve; 6. Cooling device; 7. Heating device; 8. Water pump; 9. First water level sensor; 10. Second water level sensor. Detailed Implementation

[0059] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. Those skilled in the art will understand that the following embodiments are only used to explain the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0060] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set" and "connection" 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 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 according to the specific circumstances.

[0061] 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.

[0062] This invention provides a condensation system for a clothes dryer, such as... Figure 1 As shown, including,

[0063] Circulating air duct 1;

[0064] Water collection section 2 is located below the circulating air duct 1 and is used to collect condensate generated in the circulating air duct 1 during the drying process.

[0065] Water tank 3, located inside the dryer away from the circulating air duct 1, is used to store condensate discharged from the water collection section 2;

[0066] The air guide 4 is connected at one end to the circulating air duct 1 and at the other end to the water tank 3, and is used to guide part of the hot and humid circulating air in the circulating air duct 1 into the water tank 3 for cooling.

[0067] After the hot and humid circulating air in the circulating air duct 1 is diverted by the air guide section 4, part of it continues to circulate in the circulating air duct 1, while the other part enters the water tank 3 containing a large amount of condensate along the air guide section 4. After fully exchanging heat with the condensate, it becomes low-temperature and low-humidity gas and is discharged to the outside of the dryer, thus avoiding the direct discharge of circulating air from affecting the external environment of the dryer. The cooled low-temperature and low-humidity gas can also return to the circulating air duct 1 for circulation, reducing the workload of the cooling device 6 in the circulating air duct 1 and improving the drying efficiency.

[0068] The water tank 3 is positioned away from the circulating air duct 1 to prevent the heat escaping from the circulating air duct 1 from affecting the temperature of the condensate in the water tank 3. This allows the condensate to condense the circulating air more thoroughly. In addition, the circulating air duct 1 in existing dryers is usually located at the bottom or rear of the dryer. To avoid the high temperature around the circulating air duct 1 affecting the water tank 3, the water tank 3 is positioned at the top and front of the dryer. This not only improves the condensation efficiency of the circulating air but also makes it easier for users to operate the water tank 3, thus improving the user experience.

[0069] A more detailed description will be given here with reference to specific embodiments.

[0070] Example 1

[0071] As an embodiment of the present invention, this embodiment provides a dryer condensation system, such as... Figure 1 As shown, the circulating air duct 1 is located at the bottom of the dryer, with both ends connected to the drying chamber. Inside, there is a cooling device 6 for cooling the circulating air and a heating device 7 for heating the circulating air. At the bottom of the circulating air duct 1, there is a water collection section 2, which is connected to a water tank 3 located at the top of the dryer. When there is a lot of condensate in the water collection section 2, the condensate is discharged into the water tank 3 by a water pump 8 for storage. The water tank 3 is connected to the circulating air duct 1 through a guide section 4. The hot and humid circulating air enters the water tank 3 along the guide section 4, and after being fully condensed, it is discharged to the outside of the dryer, avoiding the impact on the external environment of the dryer.

[0072] In this embodiment, as Figure 2 As shown, a water level sensor is installed inside the water tank 3. The water level sensor can continuously detect the water level in the water tank 3. The water level sensor includes a first water level sensor 9. When the water level in the water tank 3 is lower than the set position of the first water level sensor 9, the first water level sensor 9 is triggered and sends a corresponding signal to the computer board. After receiving the signal, the computer board determines that the water level in the water tank 3 is too low and issues an alarm to the user to add water to the water tank 3. The alarm ends after the user adds water to the water tank 3 or the dryer automatically adds water to the water tank 3 until the water level is higher than the set position of the first water level sensor 9.

[0073] In order to ensure that the circulating air is fully cooled and to reduce the impact of the circulating air on the external environment of the dryer, the distance between the first water level sensor 9 and the bottom of the water tank 3 is not 0. More preferably, the distance between the first water level sensor 9 and the bottom of the water tank 3 is not less than 1 / 5 of the height of the water tank 3.

[0074] Furthermore, to prevent the condensate in water tank 3 from affecting the entry of circulating air, such as... Figure 1 As shown, the air guide 4 is connected to the inside of the water tank 3 from the top, so that the circulating air will not be unable to enter the water tank 3 due to excessive water pressure. While realizing the condensation of the circulating air, it can also store more condensate in the water tank 3, thereby improving the condensation efficiency.

[0075] Based on the above solution, in order to prevent excessive condensate in the water tank 3 from overflowing from the top of the water tank 3 along the air guide 4 into the circulating air duct 1 and affecting the drying efficiency, a second water level sensor 10 is installed in the water tank 3. The second water level sensor 10 is located above the first water level sensor 9, and the distance between the second water level sensor 10 and the top of the water tank 3 is not less than 1 / 8 of the height of the water tank 3.

[0076] The location of the water level sensor mentioned above is a range determined by technicians based on extensive research. This allows for sufficient condensation of the circulating air while preventing excessive condensate from affecting the smooth entry of the circulating air. This results in smaller temperature fluctuations in the discharged circulating air after condensation, thus improving the user experience.

[0077] When the water level of the condensate in the water tank 3 is higher than the set position of the second water level sensor 10, the second water level sensor 10 sends a corresponding signal to the dryer's computer board. After receiving the signal, the computer board determines that the water level in the water tank 3 is too high and issues an alarm to prompt the user to take action, or to drain the condensate in the water tank 3 by itself. The alarm ends when the condensate level is lower than the second water level sensor 10, and drainage continues until the condensate level reaches the set position of the first water level sensor 9, at which point drainage ends.

[0078] By diverting the hot and humid circulating air through the above scheme, the workload of the cooling device 6 in the circulating air duct 1 is reduced. The diverted portion of the circulating air is cooled and then discharged to the outside of the dryer, avoiding any impact on the external environment of the dryer and improving the user experience.

[0079] Example 2

[0080] As another embodiment of the present invention, this embodiment is further modified based on Embodiment 1, specifically as follows:

[0081] In this embodiment, as Figure 3 As shown, water tank 3 also includes,

[0082] Water supply pipe 11 connects water tank 3 to the dryer's water inlet pipe;

[0083] The inlet valve, which is connected to the computer board, is located on the water supply pipe 11.

[0084] An alarm is triggered when the water level in water tank 3 is too low. Users can add water to water tank 3 manually, or they can confirm the addition of water from the dryer or a mobile terminal connected to the dryer. The dryer will then automatically add water to water tank 3. The automatic water addition process is as follows: the first water level sensor 9 sends a corresponding signal to the computer board, which controls the water inlet valve to open and replenish condensate water to water tank 3. When the water level in water tank 3 exceeds the set position of the first water level sensor 9, the first water level sensor 9 sends a signal to the computer board again, which then controls the water inlet valve to close, ending the water inlet process.

[0085] Alternatively, as an alternative to the above solution, the first water level sensor 9 detects the water level in the water tank 3 and continuously sends a first signal to the computer board. When the water level is lower than the set position of the first water level sensor 9, the first water level sensor 9 sends a second signal to the computer board. When the computer board receives the second signal, it controls the inlet valve to open. When the water level in the water tank 3 exceeds the set position of the first water level sensor 9, the first water level sensor 9 sends a first signal to the computer board again, and the computer board controls the inlet valve to close.

[0086] The above solution enables the dryer to automatically replenish water when there is little condensate in the water tank 3, thus improving the level of intelligence of the dryer.

[0087] Furthermore, a one-way valve 5 is installed on the air guide section 4 to prevent overflowing condensate from entering the air duct and affecting the drying efficiency.

[0088] Example 3

[0089] As another embodiment of the present invention, the difference between this embodiment and Embodiment 1 is that a third water level sensor is installed inside the water tank 3. The third water level sensor acquires the water level information in the water tank 3 in real time and feeds the water level information back to the computer board in real time. The computer board compares the real-time water level in the water tank 3 with the water level range preset in the computer board, specifically:

[0090] If the real-time water level is lower than the preset water level range, it is determined that the water level in water tank 3 is too low and an alarm is issued to prompt the user to add water. The user can add water manually or send a command to control the dryer to automatically add water until the real-time water level reaches the preset water level range, and then the alarm stops.

[0091] If the real-time water level is higher than the preset water level range, it is determined that the water level in water tank 3 is too high, and an alarm is issued to prompt the user to take action. The user can drain the water himself or send a command to the dryer to control the dryer to automatically drain the condensate in water tank 3. When the real-time water level reaches the preset water level range, the alarm stops. When the real-time water level reaches the minimum value within the preset water level range, drainage stops.

[0092] The present invention also provides a dryer employing the above-described control method for a dryer, specifically:

[0093] Example 4

[0094] As another embodiment of the present invention, this embodiment provides a clothes dryer having the condensation system described in Embodiment 2, comprising,

[0095] The alarm device communicates with the computer board and is used to issue an alarm to the user when the water level in the water tank is not within the preset water level threshold range.

[0096] Specifically, alarm devices can alert users through sound, light, vibration, or simultaneous sound and light.

[0097] The alarm device can be integrated into the dryer or it can be connected to the dryer. It can emit sound, light, and vibration to alert the user's mobile terminal. When the computer board determines that the water level in the water tank is too high or too low, it controls the alarm device in the dryer to sound an alarm. It can also send a signal to the mobile terminal connected to the dryer to issue an alarm to the user through the mobile terminal.

[0098] Furthermore, users can issue commands to the dryer from the dryer itself or from a mobile device, and the dryer will execute the corresponding actions based on the commands.

[0099] The above solution enables users to know the operating status of the dryer in a timely manner and remotely control the dryer, improving the level of intelligence of the dryer and avoiding the problem of drying not being able to proceed when the user is not near the dryer.

[0100] The present invention also provides a control method for a clothes dryer having the above-mentioned condensation system, as follows:

[0101] Example 5

[0102] This embodiment provides a control method for the dryer described in Embodiment 4, which acquires water level information in the water tank in real time during the drying process and controls the water level in the water tank to be within a preset water level threshold range during the drying process based on the water level information.

[0103] In this embodiment, the water level information in the water tank is acquired in real time during the drying process and defined as a first parameter. The water level threshold range includes a first water level threshold, which is the setting position of the first water level sensor. When the first parameter is less than the first water level threshold, the dryer issues an alarm to remind the user that the condensate water level in the water tank is too low. The user adds water to the water tank manually, or the dryer automatically adds water to the water tank until the condensate water level reaches the first water level threshold, at which point the alarm is deactivated. This achieves timely reminders to the user to add water when the water level in the water tank is too low, ensuring that the circulating air entering the water tank can be fully condensed and discharged, avoiding any impact on the external environment of the dryer and improving the user experience.

[0104] Furthermore, the water level threshold also includes a second water level threshold, which is the setting position of the second water level sensor. When the first parameter reaches the second water level threshold, the dryer will issue an alarm to remind the user that there is too much condensate in the water tank. The user can handle it himself or the dryer can automatically drain the condensate in the water tank until the condensate level is lower than the second water level threshold and then the alarm will be lifted.

[0105] Furthermore, when users handle the situation themselves, the water level in the tank may fall below the preset first threshold due to excessive condensate being poured out. In this case, the user may add water to the tank again, or the dryer may automatically add water until the water level reaches the first threshold.

[0106] While the dryer is automatically draining the condensate from the water tank, it continues to monitor the water level in the tank. When the water level in the tank reaches the first water level threshold, it stops draining.

[0107] The above solution can accurately control the water level of the condensate in the water tank, allowing the circulating air to smoothly enter the water tank and fully condense inside. This avoids large temperature fluctuations in the circulating air discharged to the outside of the dryer and also prevents the circulating air from failing to enter the water tank smoothly, which would reduce drying efficiency.

[0108] Example 5

[0109] As another embodiment of the present invention, this embodiment is further improved based on embodiment four, specifically as follows:

[0110] In this embodiment, when the first parameter is not within the preset water level threshold range, that is, when the first parameter is less than the first water level threshold, or when the first parameter reaches the second water level threshold, the drying process is paused. The above solution avoids the impact on the external environment of the dryer by pausing the drying process, and also avoids the drying efficiency being reduced because the circulating air cannot be fully condensed.

[0111] Furthermore, the first parameter is restored to the preset water level threshold range, and the drying process continues.

[0112] 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 condensing system for a clothes dryer, characterized in that, Comprising, a circulating air duct; a water collecting part arranged below the circulating air duct for collecting condensed water generated in the circulating air duct during the drying process; a water tank body arranged inside the drying machine away from the circulating air duct for storing the condensed water discharged from the water collecting part, the water tank body being provided with a first water level sensor and a second water level sensor, the first water level sensor being arranged inside the water tank body for sending a corresponding signal to the computer board when the water level in the water tank is below the setting position of the first water level sensor, the second water level sensor being arranged above the first water level sensor and spaced apart from the first water level sensor for sending a corresponding signal to the computer board when the water level in the water tank reaches the setting position of the second water level sensor; an air guiding part having one end in communication with the circulating air duct and the other end in communication with the water tank for guiding part of the hot and humid circulating air in the circulating air duct into the water tank for cooling.

2. The condensing system of a clothes dryer according to claim 1, characterized in that, The distance between the first water level sensor and the bottom of the water tank is not 0.

3. The clothes dryer condensing system of claim 1, wherein, The distance from the first water level sensor to the bottom of the water tank is not less than 1 / 5 of the height of the water tank.

4. The clothes dryer condensing system of claim 1, wherein, The air guiding part is in communication with the water tank from the top of the water tank, and the distance between the second water level sensor and the top of the water tank is not 0.

5. The clothes dryer condensing system of claim 1, wherein, The distance from the second water level sensor to the top of the water tank is not less than 1 / 8 of the height of the water tank.

6. The clothes dryer condensing system of claim 1, wherein, The water tank further comprises, a water replenishing pipe for connecting the water tank with the water inlet pipe of the drying machine; a water inlet valve in communication with the computer board and arranged on the water replenishing pipe.

7. A clothes dryer characterized by A drying machine condensing system as claimed in any one of claims 1-6.

8. A control method for a drying machine as claimed in claim 7, characterized in that, the water level information in the water tank is acquired in real time during the drying process, and the water level in the water tank during the drying process is controlled to be within a preset water level threshold range according to the water level information.

9. The control method of the clothes dryer according to claim 8, characterized in that, the water level information in the water collecting box is acquired in real time during the drying process, which is defined as a first parameter; the water level threshold range comprises, a first water level threshold, which is the setting position of the first water level sensor; when the first parameter is below the first water level threshold, an alarm is issued, the user adds water to the water tank, or the drying machine automatically adds water to the water tank until the first parameter reaches the first water level threshold, and the alarm is ended.

10. The control method of the clothes dryer according to claim 9, characterized in that, the water level threshold range further comprises, a second water level threshold, which is the setting position of the second water level sensor; when the first parameter reaches the second water level threshold, an alarm is issued to prompt the user that the water level is too high, the user discharges the water in the water tank, or the drying machine automatically discharges the water until the first parameter is below the second water level threshold, and the alarm is ended.

11. The control method of the clothes dryer according to claim 10, characterized in that, when the first parameter is not within the preset water level threshold range, the drying process is paused, and when the first parameter returns to the preset water level threshold range, the drying process is continued.

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