Clothes dryer

Abstract

The embodiment of the invention provides a clothes dryer. The clothes dryer comprises a shell; the clothes drying roller is arranged in the shell and provided with an air inlet and an air outlet; a heat pump system and a liquid cooling circulation heat dissipation system are further arranged in the shell, and the heat pump system is connected with an air inlet of the clothes drying roller; the controller is connected with the heat pump system and the liquid cooling circulation heat dissipation system, and the controller is used for controlling the exhaust temperature of a compressor to rise to a first temperature threshold value range and then maintain the exhaust temperature within the first temperature threshold value range if the exhaust temperature of the compressor of the heat pump system does not reach the first temperature threshold value range; when the air outlet temperature of the clothes drying roller reaches the second temperature threshold value or above, the liquid cooling circulation heat dissipation system is started to enable the air inlet temperature of the clothes drying roller to be maintained within the second temperature threshold value range; when it is detected that the moisture content of the clothes in the clothes drying roller does not reach the preset moisture content threshold value, the liquid cooling circulation heat dissipation system is controlled to be started to reduce the air inlet temperature of the clothes drying roller till drying is finished. The clothes drying speed can be increased.

Description

Technical Field

[0001] The present application relates to the technical field of clothes dryers, and in particular to a clothes dryer. Background Art

[0002] A clothes dryer is a cleaning household appliance that uses heating wire or heat pump system to evaporate the water in washed clothes instantly. At present, the drying method of clothes dryers is mainly to dry with hot air. Taking the heat pump system as an example, the air is heated by the condenser in the heat pump system and becomes high-temperature and low-humidity air. Generally, the temperature of the air entering the barrel is ≥60℃ and the relative humidity of the air entering the barrel is ≤30%. The temperature difference and humidity difference between the clothes in the barrel and the air entering the barrel are used to absorb moisture and dry the clothes.

[0003] In order to speed up the drying rate of clothes, the existing technology uses auxiliary heating or increasing the frequency of the compressor to increase the temperature of the air entering the barrel. However, since the heat pump system is a closed-circuit system, the increase in the temperature of the air entering the barrel will also cause the load of the heat pump system to increase. Excessive load on the heat pump system will reduce the drying rate of clothes.

[0004] Therefore, there is an urgent need for a clothes dryer that can effectively increase the drying rate of clothes. Summary of the invention

[0005] In order to solve the above technical problems, an embodiment of the present application provides a clothes dryer.

[0006] In a first aspect, an embodiment of the present application provides a dryer, comprising: a shell; a dryer drum arranged in the shell, the dryer drum having an air inlet and an air outlet; a heat pump system and a liquid cooling circulation heat dissipation system are also arranged in the shell, the heat pump system is connected to the air inlet of the dryer drum; a controller is connected to the heat pump system and the liquid cooling circulation heat dissipation system, the controller is configured to perform the following steps: if the exhaust temperature of the compressor of the heat pump system does not reach a first temperature threshold, the exhaust temperature of the compressor is controlled to rise to a first temperature threshold range and then maintained within the first temperature threshold range; when the air outlet temperature of the dryer drum reaches above a second temperature threshold, the liquid cooling circulation heat dissipation system is controlled to be turned on so that the air inlet temperature of the dryer drum is maintained within the second temperature threshold range; when it is detected that the moisture content of the clothes in the dryer drum does not reach a preset moisture content threshold, the liquid cooling circulation heat dissipation system is controlled to be turned on to reduce the air inlet temperature of the dryer drum until the drying is completed.

[0007] In one embodiment of the present application, based on the aforementioned solution, the controller is further configured to: increase the exhaust temperature of the compressor by increasing the frequency of the compressor and / or turning on the heating pipe.

[0008] In one embodiment of the present application, based on the aforementioned solution, the controller is further configured to: maintain the exhaust temperature of the compressor within the first temperature threshold range by reducing the frequency of the compressor and / or turning off the heating tube.

[0009] In one embodiment of the present application, based on the aforementioned scheme, the controller is further configured to: when the liquid cooling circulation heat dissipation system is turned on, determine the operating speed of the water pump according to the current operating conditions; and control the operating speed of the water pump to maintain the inlet air temperature of the drying drum within the second temperature threshold range.

[0010] In one embodiment of the present application, based on the above-mentioned solution, the controller is further configured to: determine the moisture content of the clothes in the drying drum according to the temperature and / or humidity of the clothes in the drying drum.

[0011] In one embodiment of the present application, based on the above scheme, the controller is further configured to: when it is detected that the moisture content of the clothes in the drying drum does not reach a preset moisture content threshold, further reduce the frequency of the compressor to reduce the load of the heat pump system.

[0012] In one embodiment of the present application, based on the aforementioned scheme, the controller is also configured to: after turning on the liquid cooling circulation heat dissipation system, detect the exhaust temperature or intake temperature of the compressor; if the exhaust temperature does not reach the third temperature threshold, or the intake temperature does not reach the fourth temperature threshold, control the liquid cooling circulation heat dissipation system to be turned off.

[0013] In one embodiment of the present application, based on the aforementioned scheme, the heat pump system includes: the compressor; a condenser connected to the air outlet of the compressor; an evaporator connected to the air outlet of the condenser, and the air outlet of the evaporator is connected to the air inlet of the compressor; and a throttle valve respectively connected to the condenser and the evaporator.

[0014] In one embodiment of the present application, based on the aforementioned scheme, the liquid-cooled circulating heat dissipation system includes: a water pump; a liquid-cooled heat exchanger connected to the water outlet of the water pump; a cold discharge chamber connected to the water outlet of the liquid-cooled heat exchanger, and the water outlet of the cold discharge chamber is connected to the water inlet of the water pump.

[0015] In one embodiment of the present application, based on the aforementioned solution, the liquid-cooled heat exchanger is disposed adjacent to the evaporator to reduce the temperature of the evaporator.

[0016] In the technical solution provided in the embodiments of the present application:

[0017] The dryer controls the operation of the heat pump system and the liquid cooling circulation heat dissipation system in the shell based on the detection of gas temperature. When it is detected that the air outlet temperature of the dryer drum reaches above the second temperature threshold, it indicates that the current load of the heat pump system in the shell is high. Then the liquid cooling circulation heat dissipation system is turned on to reduce the air inlet temperature of the dryer drum. Since the heat pump system is a closed-loop system, the reduction in the air inlet temperature of the dryer drum can also effectively reduce the load of the heat pump system; and the air inlet temperature of the dryer drum is maintained within the second temperature threshold range, thereby reducing the load of the heat pump system while improving the drying rate of clothes.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present application, and together with the specification, are used to explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0020] Figure 1 is a structural schematic diagram of a clothes dryer shown in an exemplary embodiment of the present application;

[0021] Figure 2 is a structural schematic diagram of a heat pump system shown in an exemplary embodiment of the present application;

[0022] Figure 3 is a structural schematic diagram of a liquid cooling circulation heat dissipation system shown in an exemplary embodiment of the present application;

[0023] Figure 4 is based on Figure 3 The gas circulation schematic diagram of the liquid cooling circulation heat dissipation system shown;

[0024] Figure 5 is a structural schematic diagram of a liquid cooling circulation heat dissipation system shown in another exemplary embodiment of the present application;

[0025] Figure 6 is based on Figure 5 The gas circulation schematic diagram of the liquid cooling circulation heat dissipation system shown;

[0026] Figure 7 is a structural schematic diagram of a heat pump system combined with a liquid cooling circulation system shown in an exemplary embodiment of the present application;

[0027] Figure 8is a control flow chart of a controller in a clothes dryer shown in an exemplary embodiment of the present application. DETAILED DESCRIPTION

[0028] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0029] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities may be implemented in software form, or in one or more hardware modules or integrated circuits, or in different networks and / or processor devices and / or microcontroller devices.

[0030] The flowcharts shown in the accompanying drawings are only exemplary and do not necessarily include all the contents and operations / steps, nor must they be executed in the order described. For example, some operations / steps can be decomposed, and some operations / steps can be combined or partially combined, so the actual execution order may change according to actual conditions.

[0031] It should also be noted that the "multiple" mentioned in this application refers to two or more than two. "And / or" describes the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship.

[0032] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present application and the drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device comprising a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units inherent to these processes, methods, products or devices.

[0033] In order to speed up the drying rate of clothes, the existing technology uses auxiliary heating or increases the frequency of the compressor to increase the temperature of the air entering the barrel. However, since the heat pump system is a closed-circuit system, the increase in the temperature of the air entering the barrel will also cause the load of the heat pump system to increase. Excessive load on the heat pump system will reduce the drying rate of clothes.

[0034] In order to solve the above technical problems, the present application proposes a clothes dryer. Figure 1 FIG. 1 is a schematic diagram of the structure of a clothes dryer provided by an exemplary embodiment of the present application. Figure 1 As shown, the clothes dryer 10 includes a housing 11, a clothes drying drum 12, an air inlet 13 of the clothes drying drum, an air outlet 14 of the clothes drying drum, a heat pump system, a liquid cooling circulation heat dissipation system and a controller. Each part of the clothes dryer 10 will be introduced one by one below.

[0035] The housing 11 is the external structure of the dryer 10 and is used to fix and protect the internal components. The housing 11 is usually made of metal or plastic, and is usually provided with a control panel, operation buttons, a display screen, etc., for triggering operation instructions and monitoring the operating status of the dryer 10.

[0036] The drying drum 12 is a main component of the clothes dryer 10, and is used to provide enough space for placing clothes. The drying drum 12 is usually composed of a metal grid or a stainless steel cylinder, and the clothes are evenly heated by rotation, thereby achieving an effect of uniform drying of the clothes.

[0037] The air inlet 13 of the drying drum is usually located on one side or the back of the drying drum 12, and is used to introduce fresh air or circulating air into the drying drum 12. The air inlet 13 of the drying drum is usually provided with a filter to prevent dust and impurities from entering the drying drum 12, thereby ensuring the cleanliness and effectiveness of the clothes drying process.

[0038] The air outlet 14 of the drying drum is usually located at the other side or the top of the drying barrel 12, and is used to discharge moisture and hot air to maintain air circulation during the drying process and to quickly dry the clothes.

[0039] The structure of the heat pump system is as follows Figure 2 As shown, the heat pump system 20 includes a compressor 21, a condenser 22, a throttle valve 23 and an evaporator 24. The air outlet of the compressor 21 is connected to the condenser 22, the air outlet of the condenser 22 is connected to the evaporator 24, the two ends of the throttle valve 23 are respectively connected to the condenser 22 and the evaporator 24, and the air outlet of the evaporator 24 is connected to the air inlet of the compressor 21.

[0040] The various parts of the heat pump system 20 will be introduced one by one below.

[0041] The compressor 21 is used to convert the absorbed gas into a high-temperature and high-pressure gas to increase the exhaust temperature of the compressor 21. The condenser 22 is used to receive the high-temperature and high-pressure gas. The condenser 22 is usually in the form of a radiator, and heat is dissipated by transferring heat to the outside air to increase the air inlet temperature of the drying drum 12. The throttle valve 23 (also called an expansion valve) is located between the condenser 22 and the evaporator 23, and is used to adjust the speed and pressure change of the gas output by the condenser 22 to the evaporator 23. The evaporator 24 is used to absorb the heat of the low-temperature and low-pressure gas from the outside environment, thereby converting it into a high-temperature and low-pressure steam state.

[0042] The structure of the liquid cooling circulation heat dissipation system can be as follows Figure 3 As shown, the liquid cooling circulation heat dissipation system 30 includes a cold row chamber 31, a liquid cooling heat exchange wall 32, a water pump 33 and a fan 34. Figure 3 The gas circulation proposed by the liquid cooling circulation heat dissipation system shown in FIG. Figure 4 As shown, the air outlet of the drying drum passes through the liquid-cooled heat exchange wall, the evaporator, and the condenser in sequence before entering the air inlet of the drying drum.

[0043] In another exemplary embodiment, the liquid cooling heat exchange wall 32 in the liquid cooling circulation heat dissipation system 30 may also be replaced with a liquid cooling heat exchanger, thereby forming another liquid cooling circulation heat dissipation system such as Figure 5 As shown, the liquid cooling circulation heat dissipation system 50 includes a cold discharge chamber 51 connected to the water outlet of the liquid cooling heat exchanger, a liquid cooling heat exchanger 52 connected to the water outlet of the water pump 53, a water pump 53 and a fan 54. Figure 5 The gas circulation proposed by the liquid cooling circulation heat dissipation system shown in FIG. Figure 6 As shown, the air outlet of the drying drum passes through the liquid-cooled heat exchanger, the evaporator, and the condenser in sequence before entering the air inlet of the drying drum.

[0044] The following will introduce each part of the liquid cooling circulation heat dissipation system one by one.

[0045] The cold row chamber 31 and the cold row chamber 41 are both used to accommodate the cold row of the heat dissipation device, and are generally made of high thermal conductivity materials to ensure that the liquid cooling medium (usually water or other coolants) can effectively absorb the heat in the air.

[0046] The liquid-cooled heat exchange wall 32 is used to transfer heat between the liquid cooling medium and the heat dissipation device. The liquid-cooled heat exchange wall 32 is usually made of a metal material and has good thermal conductivity.

[0047] The liquid cooling heat exchanger 42 can replace the liquid cooling heat exchange wall 32. The liquid cooling heat exchanger 42 is usually composed of a series of metal sheets or aluminum sheets, and there are small gaps between these metal sheets or aluminum sheets to increase the heat dissipation surface area. When the liquid cooling medium passes through the liquid cooling heat exchanger, the heat is transferred from the cooling medium to the heat exchanger and released to the surrounding environment by heat dissipation.

[0048] The water pump 33 and the water pump 43 are both used to circulate the liquid cooling medium, extract the liquid cooling medium from the cold row chamber 31, and then transport it to the heat dissipation device (such as the liquid cooling heat exchange wall 32 or the liquid cooling heat exchanger 42) through the pipeline system to complete the heat transfer process. The water pump 33 and the water pump 43 have a certain flow rate and pressure capacity to ensure that the liquid cooling medium can circulate smoothly and effectively absorb and take away heat.

[0049] Fan 34 and fan 44 are effective auxiliary heat dissipation devices that help dissipate heat by generating airflow. The fans can be driven by a power supply or a motor and operate at different speeds and rotation speeds according to actual needs.

[0050] See also Figure 7 , Figure 7 It is a structural schematic diagram of a heat pump system combined with a liquid cooling circulation system shown in an exemplary embodiment of the present application. The figure includes a compressor 71, a condenser 72, a throttle valve 73, an evaporator 74, a liquid cooling heat exchanger 75, a cold exhaust chamber 76, a fan 77 and a water pump 78. Among them, the liquid cooling heat exchanger 75 and the evaporator 74 are separated and arranged within a certain distance range, and the liquid cooling heat exchanger 75 and the evaporator 74 are connected through a heat transfer medium (such as heat transfer oil or cooling water). The cold medium exchanges heat with the heat transfer medium through the liquid cooling heat exchanger, and the heat transfer medium exchanges heat with the evaporator 74, thereby reducing the temperature of the evaporator 74. In addition, multiple heat exchange stages can be set between the liquid cooling heat exchanger 75 and the evaporator 74. Through the step-by-step heat exchange process, the temperature of the evaporator is gradually reduced, so that the heat exchange efficiency can be improved while ensuring a large temperature difference.

[0051] The controller is disposed in the housing 11 and is connected to the heat pump system and the liquid cooling circulation heat dissipation system. The controller is configured to perform the following steps:

[0052] If the exhaust temperature of the compressor of the heat pump system does not reach the first temperature threshold, controlling the exhaust temperature of the compressor to rise to within the first temperature threshold range and then maintain within the first temperature threshold range;

[0053] When the air outlet temperature of the drying drum reaches above the second temperature threshold, the liquid cooling circulation heat dissipation system is controlled to be turned on so that the air inlet temperature of the drying drum is maintained within the second temperature threshold range;

[0054] When it is detected that the moisture content of the clothes in the drying drum has not reached the preset moisture content threshold, the liquid cooling circulation heat dissipation system is controlled to start to reduce the inlet air temperature of the drying drum until the drying is completed.

[0055] If it is detected that the exhaust temperature of the compressor in the heat pump system does not reach the first temperature threshold, the compressor frequency can be increased and / or the heating pipe can be turned on to increase the exhaust temperature of the compressor. When the exhaust temperature of the compressor rises to within the first temperature threshold range, the current compressor frequency and / or the heating pipe operation are controlled to maintain the exhaust temperature of the compressor within the first temperature threshold range. If the exhaust temperature of the compressor rises above the first temperature threshold range, the compressor frequency is reduced and / or the heating pipe is turned off to maintain the exhaust temperature of the compressor within the first temperature threshold range.

[0056] It should be noted that the first temperature threshold is the minimum value within the first temperature threshold range, and the rise exceeding the first temperature threshold range means the rise exceeds the maximum value within the first temperature threshold range.

[0057] Exemplarily, the first temperature threshold range is 90°C-110°C, and the first temperature threshold is 90°C. If it is detected that the exhaust temperature of the compressor has not reached 90°C, the exhaust temperature of the compressor is controlled to rise to 90°C-110°C. If it is detected that the exhaust temperature of the compressor has risen to more than 110°C, the exhaust temperature of the compressor is maintained within 90°C-110°C by reducing the frequency of the compressor and / or turning off the heating pipe.

[0058] When the air outlet temperature of the drying drum reaches above the second temperature threshold, indicating that the current load of the heat pump system in the housing is high, the liquid cooling circulation heat dissipation system is controlled to be turned on to reduce the air inlet temperature of the drying drum, so that the air inlet temperature of the drying drum is maintained within the second temperature threshold range. When the liquid cooling circulation heat dissipation system is turned on, the water pump also starts to run, wherein the water pump can run at a constant speed or at a variable speed.

[0059] In another exemplary embodiment, the controller is further configured to perform the following steps:

[0060] When the liquid cooling circulation system is turned on, the running speed of the water pump is determined according to the current working conditions;

[0061] The operating speed of the water pump is controlled so that the air inlet temperature of the drying drum is maintained within the second temperature threshold range.

[0062] Specifically, the operating speed of the water pump is determined according to the current working conditions. If the air outlet temperature of the dryer drum in the current working conditions exceeds the second temperature threshold and exceeds the preset limit, it indicates that heat dissipation is urgently needed, and the water pump is controlled to operate at a higher speed; if the air outlet temperature of the dryer drum in the current working conditions exceeds the second temperature threshold but does not exceed the preset limit, it indicates that the current heat dissipation demand is not strong, and the water pump is controlled to operate at a relatively lower speed.

[0063] Furthermore, since the second temperature threshold corresponds to the air outlet temperature of the drying drum, the second temperature threshold range corresponds to the air inlet temperature of the drying drum, and the air inlet of the drying drum will inevitably cause heat loss in the drying drum, any value within the second temperature threshold range is greater than the second temperature threshold. Exemplarily, the second temperature threshold is any value between 40°C and 55°C, and the second temperature threshold range can be between 55°C and 75°C. When the second temperature threshold is 55°C, the second temperature threshold range must be greater than 55°C.

[0064] When it is detected that the moisture content of the clothes in the drying drum has not reached (i.e. has not exceeded) the preset moisture content threshold, preferably, the preset moisture content is 3%-10%, indicating that the clothes in the drying drum are about to be dried, the liquid cooling circulation heat dissipation system is controlled to start, and the frequency of the compressor is reduced or disconnected to reduce the inlet air temperature of the drying drum, thereby reducing the load of the heat pump system and cooling the clothes in the drying drum until the drying is completed.

[0065] The moisture content of the clothes in the drying drum may be determined only according to the humidity of the clothes, may be determined only according to the temperature of the clothes, or may be determined jointly according to the humidity of the clothes and the temperature of the clothes.

[0066] When determining the moisture content of clothes according to the humidity of clothes, a clothing humidity-clothing moisture content model is pre-established, and the moisture content of clothes is determined according to the detected clothing humidity and the clothing humidity-clothing moisture content model; when determining the moisture content of clothes according to the temperature of clothes, a clothing temperature-clothing moisture content model is pre-established, and the moisture content of clothes is determined according to the detected clothing temperature and the clothing temperature-clothing moisture content model. When determining the moisture content of clothes according to both the humidity of clothes and the temperature of clothes, a clothing humidity temperature-clothing moisture content model is pre-established, and the moisture content of clothes is determined according to the detected clothing temperature, the clothing temperature, and the clothing humidity temperature-clothing moisture content model.

[0067] For example, the initial moisture content of the clothes is 50%, and as the drying process proceeds, the moisture in the clothes gradually decreases. After a period of drying time, the temperature of the clothes is 60°C and the humidity is 20%. The moisture content of the clothes is determined according to a pre-established clothes humidity temperature-clothing moisture content model. For example, the model shows that the moisture content of the clothes is 30% when the temperature is 60°C and the humidity is 20%.

[0068] In another exemplary embodiment, the controller is further configured to perform the following steps:

[0069] After starting the liquid cooling circulation heat dissipation system, detect the exhaust temperature or suction temperature of the compressor;

[0070] If the exhaust temperature does not reach the third temperature threshold, or the intake temperature does not reach the fourth temperature threshold, the liquid cooling circulation heat dissipation system is controlled to be closed.

[0071] After the liquid cooling circulation heat dissipation system is turned on, the exhaust temperature of the compressor or the suction temperature of the compressor is monitored in real time. If it is detected that the exhaust temperature of the compressor has not reached the third temperature threshold, or the suction temperature of the compressor has not reached the fourth temperature threshold, indicating that the heat dissipation demand of the current working conditions is not strong, the liquid cooling circulation heat dissipation system is controlled to be shut down.

[0072] As can be seen from the above, the dryer in this embodiment controls the operation of the heat pump system and the liquid cooling circulation heat dissipation system in the shell based on the detection of the gas temperature. When it is detected that the air outlet temperature of the drying drum reaches above the second temperature threshold, it indicates that the current load of the heat pump system in the shell is relatively high, and then the liquid cooling circulation heat dissipation system is turned on to reduce the air inlet temperature of the drying drum. Since the heat pump system is a closed-loop system, the reduction in the air inlet temperature of the drying drum can also effectively reduce the load of the heat pump system; and the air inlet temperature of the drying drum is maintained within the second temperature threshold, so that the drying rate of clothes can be improved while reducing the load of the heat pump system.

[0073] See also Figure 8 , Figure 8This is a control flow chart of a controller in a clothes dryer shown in an exemplary embodiment of the present application. Based on the button operation on the shell or the indication operation on the mobile terminal by the user, the controller starts to run; after the controller starts to run, it determines whether the exhaust temperature of the compressor (i.e., Texhaust) is less than or equal to the first temperature threshold (i.e., T1). If it is determined to be yes, the auxiliary heat is turned on and / or the frequency of the compressor is increased until the exhaust temperature of the compressor is greater than the first temperature threshold. If it is determined to be no, the auxiliary heat is turned off and / or the frequency of the compressor is reduced; then it is determined whether the outlet air temperature of the drying drum (i.e., Tout) is less than the second temperature threshold (i.e., T2). If it is determined to be yes, the water pump is turned on. If If it is determined to be yes, the water pump is turned off; after turning on the water pump, it is determined whether the exhaust temperature of the compressor (i.e., Texhaust) is less than or equal to the third temperature threshold (i.e., T3), or the suction temperature of the compressor (i.e., Tinhalation) is less than or equal to the fourth temperature threshold (i.e., T4). If it is determined to be yes, the water pump is turned off; if it is determined to be no, the water pump is turned on; then, it is detected whether the moisture content of the clothes is less than or equal to the preset moisture content threshold (i.e., c1). If it is determined to be no, it returns to continue to determine "Texhaust ≤ T3 or Tinhalation ≤ T4". If it is determined to be yes, the water pump is turned on to cool down the clothes until the drying is completed.

[0074] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the embodiments disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary technical means in the art that are not disclosed in the present application.

[0075] It should be understood that the above content is only a preferred exemplary embodiment of the present application and is not intended to limit the implementation scheme of the present application. A person skilled in the art can easily make corresponding changes or modifications based on the main concept and spirit of the present application. Therefore, the scope of protection of the present application shall be based on the scope of protection required by the claims.

Claims

1. A clothes dryer, characterized in that: include: case; A clothes drying drum disposed in the housing, the clothes drying drum having an air inlet and an air outlet; A heat pump system and a liquid cooling circulation heat dissipation system are also provided in the housing, and the heat pump system is connected to the air inlet of the drying drum; A controller is connected to the heat pump system and the liquid cooling circulation heat dissipation system, and the controller is configured to perform the following steps: If the exhaust temperature of the compressor of the heat pump system does not reach the first temperature threshold, controlling the exhaust temperature of the compressor to rise to within the first temperature threshold range and then maintain within the first temperature threshold range; When the air outlet temperature of the drying drum reaches above a second temperature threshold, the liquid cooling circulation heat dissipation system is controlled to be turned on so that the air inlet temperature of the drying drum is maintained within the second temperature threshold range; When it is detected that the moisture content of the clothes in the drying drum does not reach the preset moisture content threshold, the liquid cooling circulation heat dissipation system is controlled to be turned on to reduce the inlet air temperature of the drying drum until the drying is completed.

2. The clothes dryer according to claim 1, characterized in that: The controller is also configured to: The exhaust temperature of the compressor is increased by increasing the frequency of the compressor and / or turning on the heating pipe.

3. The clothes dryer according to claim 2, characterized in that: The controller is also configured to: The exhaust temperature of the compressor is maintained within the first temperature threshold range by reducing the frequency of the compressor and / or turning off the heating tube.

4. The clothes dryer according to claim 1, characterized in that: The controller is also configured to: When the liquid cooling circulation heat dissipation system is turned on, the operating speed of the water pump is determined according to the current working conditions; The operating speed of the water pump is controlled so that the air inlet temperature of the drying drum is maintained within the second temperature threshold range.

5. The clothes dryer according to claim 1, characterized in that: The controller is also configured to: The moisture content of the clothes in the drying drum is determined according to the temperature of the clothes and / or the humidity of the clothes in the drying drum.

6. The clothes dryer according to claim 1, characterized in that: The controller is also configured to: When it is detected that the moisture content of the clothes in the drying drum does not reach a preset moisture content threshold, the frequency of the compressor is further reduced to reduce the load of the heat pump system.

7. The clothes dryer according to claim 1, characterized in that: The controller is also configured to: After the liquid cooling circulation heat dissipation system is turned on, the exhaust temperature or the suction temperature of the compressor is detected; If the exhaust temperature does not reach the third temperature threshold, or the intake temperature does not reach the fourth temperature threshold, the liquid cooling circulation heat dissipation system is controlled to be closed.

8. The clothes dryer according to any one of claims 1 to 7, characterized in that: The heat pump system comprises: the compressor; a condenser connected to the air outlet of the compressor; an evaporator connected to the air outlet of the condenser, wherein the air outlet of the evaporator is connected to the air inlet of the compressor; The throttle valves are respectively connected to the condenser and the evaporator.

9. The clothes dryer according to claim 8, characterized in that: The liquid cooling circulation heat dissipation system comprises: Water pump; a liquid-cooled heat exchanger connected to the water outlet of the water pump; A cold discharge chamber connected to the water outlet of the liquid-cooled heat exchanger, wherein the water outlet of the cold discharge chamber is connected to the water inlet of the water pump.

10. The clothes dryer according to claim 9, characterized in that: The liquid-cooled heat exchanger is disposed adjacent to the evaporator to reduce the temperature of the evaporator.

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