Clothes dryer

Abstract

The embodiment of the present application belongs to the technical field of household appliances, and particularly relates to a clothes dryer. The embodiment of the present application aims to solve the problem of slow drying speed of clothes in related heat pump clothes dryers. The clothes dryer of the embodiment of the present application comprises a drying drum and a heat pump system, the heat pump system comprises a compressor, a condenser, a throttling device, a first evaporator and a second evaporator, and the drying drum has an air inlet side and an air outlet side. Through the above arrangement, part of the hot and humid air discharged from the air outlet side is cooled and condensed to water at the first evaporator, and another part of the hot and humid air is cooled and condensed to water at the second evaporator. After the cooling of the hot and humid air by the first evaporator and the second evaporator, the air discharged from the drying drum can be cooled more effectively, and water can be condensed, so that the dryness of the air returned from the heat pump system into the drying drum is increased, and the air is drier, which can take away more water on the surface of the clothes, thereby accelerating the drying speed and shortening the drying time.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, specifically to a clothes dryer. Background Technology

[0002] A clothes dryer is a device used to dry damp clothes. It works by using hot, dry air to flow over the surface of the clothes, heating them and carrying away the evaporated moisture, thus drying the clothes quickly. Clothes dryers include vented, condenser, and heat pump types. Heat pump dryers, with their more even drying, fluffier fabrics, less damage to clothes, and lower energy consumption, have become the mainstream drying equipment.

[0003] In related technologies, a heat pump dryer includes a housing, a drying drum, a fan, and a heat pump system. The drying drum, fan, and heat pump system are all housed within the housing. The drying drum is used to hold clothes and includes an air inlet and an air outlet. The heat pump system includes an air inlet and an air outlet, with the air inlet connected to the air outlet and the air outlet connected to the air inlet. The heat pump system is used to convert humid hot air from the air outlet into dry hot air, which is then blown out from the air outlet. The fan is used to circulate air between the heat pump system and the drying drum. The dry hot air from the heat pump system dries the damp clothes inside the drying drum.

[0004] However, heat pump systems dry at low temperatures. While low-temperature drying causes less damage to clothes, it also results in slower drying speeds and longer drying times. Summary of the Invention

[0005] To address the aforementioned problems in related technologies, specifically the slow drying speed of clothes in related heat pump dryers, this invention provides a dryer comprising: a drying drum and a heat pump system. The heat pump system includes a compressor, a condenser, a throttling device, a first evaporator, and a second evaporator. The outlet of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the throttling device, and the outlet of the throttling device is connected to the inlets of the first and second evaporators. The outlets of both the first and second evaporators are connected to the inlet of the compressor. The first evaporator has a first air inlet and a first air outlet, the second evaporator has a second air inlet and a second air outlet, and the condenser has a third air inlet and a third air outlet. Both the first and second air outlets are connected to the third air inlet. The drying drum has an air inlet side and an air outlet side, the third air outlet is connected to the air inlet side, and the air outlet side is connected to the first and second air inlets.

[0006] In the preferred embodiment of the above-mentioned dryer, the air outlet side is connected to the first air inlet end through a first air duct, the second air inlet end is connected to the first air duct through a second air duct, and a first control switch is provided at the junction of the second air duct and the first air duct. The first control switch is used to control the connection or disconnection between the first air inlet end and the air outlet side, and to control the connection or disconnection between the second air inlet end and the air outlet side. The outlet of the throttling device is connected to the inlet of the second evaporator through a first pipe, and a second control switch is provided on the first pipe.

[0007] In the preferred embodiment of the above-mentioned dryer, the dryer further includes a temperature detection device and a controller. The temperature detection device is used to detect the air temperature inside the drying drum. The temperature detection device, the first control switch, and the second control switch are all electrically connected to the controller.

[0008] In the preferred embodiment of the above-mentioned dryer, the third air outlet is connected to the air inlet via a third air duct, and the dryer also includes a heater for heating the air in the third air duct.

[0009] In the preferred embodiment of the above-mentioned dryer, the heater includes a heating wire, which is disposed within the third air duct.

[0010] In the preferred embodiment of the above-mentioned dryer, the heater is electrically connected to the controller.

[0011] In the preferred embodiment of the above-mentioned dryer, the dryer further includes a fan, which is used to circulate air between the drying drum and the heat pump system.

[0012] In the preferred embodiment of the above-mentioned dryer, the fan is disposed within the third air duct.

[0013] In the preferred embodiment of the above-mentioned dryer, the dryer further includes a water box for collecting condensate from the first evaporator and the second evaporator.

[0014] In the preferred embodiment of the above-mentioned dryer, the dryer further includes a drive device for driving the drying drum to rotate.

[0015] Those skilled in the art will understand that the dryer of this embodiment includes a drying drum and a heat pump system. The heat pump system includes a compressor, a condenser, a throttling device, a first evaporator, and a second evaporator. The outlet of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the throttling device, the outlet of the throttling device is connected to the inlets of the first and second evaporators, and the outlets of both the first and second evaporators are connected to the inlet of the compressor. The first evaporator has a first air inlet and a first air outlet, the second evaporator has a second air inlet and a second air outlet, and the condenser has a third air inlet and a third air outlet. Both the first and second air outlets are connected to the third air inlet. The drying drum has an air inlet side and an air outlet side, the third air outlet is connected to the air inlet side, and the air outlet side is connected to the first and second air inlets. With the above configuration, part of the hot and humid air discharged from the air outlet is cooled and condensed into moisture at the first evaporator, and the other part is cooled and condensed into moisture at the second evaporator. After being cooled by the first and second evaporators, the hot and humid air discharged from the dryer drum can be cooled more effectively and condensed into moisture. This increases the dryness of the air returning from the heat pump system into the dryer drum. The drier air can remove more moisture from the surface of the clothes, thereby speeding up the drying process and shortening the drying time. Attached Figure Description

[0016] A preferred embodiment of the clothes dryer according to the present invention will now be described with reference to the accompanying drawings. The drawings are as follows:

[0017] Figure 1 This is a schematic diagram of the structure of the clothes dryer according to an embodiment of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic diagram of the heat pump system in the dryer according to an embodiment of the present invention;

[0019] Figure 3 This is a schematic diagram of the structure of the clothes dryer according to an embodiment of the present invention. Figure 2 .

[0020] In the attached image:

[0021] 100. Clothes dryer; 200. Heat pump system;

[0022] 400. Heater; 500. Fan;

[0023] 600, Water box; 700, Motor;

[0024] 101. Air inlet side; 102. Air outlet side;

[0025] 210. Compressor; 220. First evaporator;

[0026] 221. First air inlet; 222. First air outlet;

[0027] 230. Second evaporator; 231. Second air inlet;

[0028] 232. Second air outlet; 240. Condenser;

[0029] 241. Third air inlet; 242. Third air outlet;

[0030] 250. Throttling valve; 260. First pipeline;

[0031] 270. Second control switch; 301. First air duct;

[0032] 302. Second air duct; 303. First control switch;

[0033] 304. Third air duct. Detailed Implementation

[0034] First, those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0035] Secondly, it should be noted that in the description of the embodiments of the present invention, the terms "inner" and "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the embodiments of the present invention.

[0036] Furthermore, it should be noted that, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In related technologies, a heat pump dryer includes a housing, a drying drum, a fan, and a heat pump system. The drying drum, fan, and heat pump system are all housed inside the housing. The drying drum is used to hold clothes. A belt is fitted on the outer wall of the drying drum. The belt is connected to the drying drum for transmission. A motor drives the belt to rotate, thereby causing the drying drum to rotate around its own axis.

[0039] A heat pump system includes a compressor, condenser, expansion valve, and evaporator. The compressor, condenser, expansion valve, and evaporator are connected by pipes through which refrigerant flows. The compressor compresses the low-pressure gaseous refrigerant into a high-pressure gaseous refrigerant. The high-pressure gaseous refrigerant is delivered to the condenser, where it dissipates heat and becomes a high-pressure liquid refrigerant. It then enters the evaporator through the expansion valve. The high-pressure liquid refrigerant exiting the condenser decreases in pressure as it passes through the expansion valve again, becoming a low-pressure liquid refrigerant. This low-pressure liquid refrigerant enters the evaporator, where it absorbs heat and becomes a low-pressure gaseous refrigerant. The low-pressure gaseous refrigerant flows back to the compressor, which compresses it into a high-pressure gaseous refrigerant. This cycle repeats, causing the refrigerant to release heat and condense in the condenser, and evaporate and absorb heat in the evaporator.

[0040] The clothes dryer includes an air inlet and an air outlet. The air inlet is located near the condenser, and the air outlet is located near the evaporator. A fan directs air from the air outlet to the evaporator and then to the condenser, before returning it to the dryer from the air inlet. The hot, humid air discharged from the air outlet condenses into cool, dry air at the evaporator. This cool, dry air is then heated into hot, dry air at the condenser. The hot, dry air returns to the dryer from the air inlet, flowing over the surface of the clothes, heating them and carrying away the moisture that has evaporated from them, thus drying the clothes quickly.

[0041] To minimize damage to clothes during the drying process, the temperature of the condenser is generally kept below 60°C. However, this also results in a slow drying speed and a longer drying time for clothes.

[0042] In addition, the water vapor in the hot and humid air discharged from the air outlet usually cannot be completely condensed at the evaporator. Some water vapor will still return to the drying drum, which reduces the amount of moisture that the hot and humid air can remove from the surface of the clothes, thus reducing the drying speed of the clothes dryer.

[0043] This embodiment provides a clothes dryer with two evaporators, which allow water vapor in the hot and humid air discharged from the drying drum to be completely condensed. This increases the dryness of the air returning from the heat pump system to the drying drum, and the drier air can remove more moisture from the surface of the clothes, thereby accelerating the drying speed of the clothes.

[0044] The principles and features of the embodiments of the present invention are described below with reference to the accompanying drawings. The examples given are only used to explain the embodiments of the present invention and are not intended to limit the scope of the embodiments of the present invention.

[0045] like Figure 1 As shown, the clothes dryer provided in this embodiment of the invention includes a housing, a drying drum 100, a heat pump system 200, and a fan 500. The drying drum 100, the heat pump system 200, and the fan 500 can be arranged inside the housing. The drying drum 100 is used to hold clothes that need to be dried, and the axis of the drying drum 100 can be parallel to the horizontal plane.

[0046] Continue to refer to Figure 1 and Figure 2 The heat pump system 200 includes a compressor 210, a condenser 240, a throttling device, a first evaporator 220, and a second evaporator 230 connected by pipes. Refrigerant flows through the pipes. The outlet of the compressor 210 is connected to the inlet of the condenser 240. The outlet of the condenser 240 is connected to the inlet of the throttling device. The outlet of the throttling device is connected to the inlet of the first evaporator 220 and the second evaporator 230. The outlets of the first evaporator 220 and the second evaporator 230 are both connected to the inlet of the compressor 210.

[0047] The throttling device may include a throttling valve 250, a capillary tube, etc., as long as it can convert high-pressure refrigerant into low-pressure refrigerant. This embodiment is described using a throttling device including a throttling valve 250 as an example.

[0048] Compressor 210 compresses low-pressure gaseous refrigerant into high-pressure gaseous refrigerant. The high-pressure gaseous refrigerant is delivered to condenser 240, where it dissipates heat and becomes high-pressure liquid refrigerant. The high-pressure liquid refrigerant is then reduced in pressure by throttling valve 250, becoming low-pressure liquid refrigerant. Part of the low-pressure liquid refrigerant enters the first evaporator 220, where it absorbs heat and becomes low-pressure gaseous refrigerant. The other part of the low-pressure liquid refrigerant enters the second evaporator 230, where it absorbs heat and becomes low-pressure gaseous refrigerant. The low-pressure gaseous refrigerant discharged from the first evaporator 220 and the second evaporator 230 both flow to compressor 210, which compresses the low-pressure gaseous refrigerant into high-pressure gaseous refrigerant. This cycle continues, causing the refrigerant to release heat and condense at condenser 240, and to evaporate and absorb heat at the first evaporator 220 and the second evaporator 230.

[0049] Continue to refer to Figure 1 and Figure 3The first evaporator 220 has a first air inlet 221 and a first air outlet 222, the second evaporator 230 has a second air inlet 231 and a second air outlet 232, and the condenser 240 has a third air inlet 241 and a third air outlet 242. The first air outlet 222 and the second air outlet 232 are both connected to the third air inlet 241. The clothes dryer 100 has an air inlet side 101 and an air outlet side 102. The third air outlet is connected to the air inlet side 101, and the air outlet side 102 is connected to the first air inlet 221 and the second air inlet 231.

[0050] Part of the hot and humid air discharged from the air outlet 102 is cooled and condensed into moisture at the first evaporator 220, and another part is cooled and condensed into moisture at the second evaporator 230. After being cooled by the first evaporator 220 and the second evaporator 230, the hot and humid air discharged from the dryer drum 100 can be cooled more effectively and condensed into moisture. This increases the dryness of the air returning from the heat pump system 200 to the dryer drum 100. The drier air can remove more moisture from the surface of the clothes, thereby speeding up the drying process and shortening the drying time.

[0051] Meanwhile, more heat from the hot and humid air discharged from the dryer drum 100 can be absorbed by the first evaporator 220 and the second evaporator 230 and returned to the heat pump system 200, making the dryer more energy-efficient and environmentally friendly during operation.

[0052] The dry, cold air that has been cooled and condensed by the first evaporator 220 and the second evaporator 230 is heated into dry, hot air at the condenser 240. The dry, hot air returns to the drying drum 100 from the air inlet side 101. The dry, hot air flows over the surface of the clothes, heats the clothes and carries away the moisture that has evaporated from the clothes, so that the clothes dry quickly.

[0053] The clothes dryer in this embodiment includes a drying drum 100 and a heat pump system 200. The heat pump system 200 includes a compressor 210, a condenser 240, a throttling device, a first evaporator 220, and a second evaporator 230. The outlet of the compressor 210 is connected to the inlet of the condenser 240, the outlet of the condenser 240 is connected to the inlet of the throttling device, and the outlet of the throttling device is connected to the inlets of the first evaporator 220 and the second evaporator 230. The outlets of both the first evaporator 220 and the second evaporator 230 are connected to the inlet of the compressor 210. The first evaporator 220 has a first air inlet 221 and a first air outlet 222, the second evaporator 230 has a second air inlet 231 and a second air outlet 232, and the condenser 240 has a third air inlet 241 and a third air outlet 242. The first air outlet 222 and the second air outlet 232 are both connected to the third air inlet 241. The clothes dryer 100 has an air inlet side 101 and an air outlet side 102. The third air outlet is connected to the air inlet side 101, and the air outlet side 102 is connected to the first air inlet 221 and the second air inlet 231. With the above configuration, a portion of the hot and humid air discharged from the air outlet 102 is cooled and condensed into moisture at the first evaporator 220, and another portion is cooled and condensed into moisture at the second evaporator 230. After being cooled by the first evaporator 220 and the second evaporator 230, the hot and humid air discharged from the dryer drum 100 can be cooled more effectively and condensed into moisture, thereby increasing the dryness of the air returning from the heat pump system 200 to the dryer drum 100. The drier air can remove more moisture from the surface of the clothes, thus speeding up the drying process and shortening the drying time.

[0054] Continue to refer to Figure 3 In some embodiments, the air outlet 102 is connected to the first air inlet 221 through a first air duct 301, and the second air inlet 231 is connected to the first air duct 301 through a second air duct 302. A first control switch 303 is provided at the junction of the second air duct 302 and the first air duct 301. The first control switch 303 is used to control the connection or disconnection between the first air inlet 221 and the air outlet 102, and to control the connection or disconnection between the second air inlet 231 and the air outlet 102.

[0055] The first control switch 303 can also be set at the junction of the second air duct 302 and the first air duct 301 and between the first air inlet end 221 to control the connection or disconnection between the air outlet side 102 and the first air inlet end 221.

[0056] Continue to refer to Figure 1 and Figure 2 The outlet of the throttling device is connected to the inlet of the second evaporator 230 through the first pipe 260, and the first pipe 260 is equipped with a second control switch 270.

[0057] The first control switch 303 may include a solenoid valve or other device that can control the opening or closing of the first air duct 301. The second control switch 270 may include a solenoid valve or other device that can control the opening or closing of the first pipeline 260.

[0058] When the user starts the dryer, the first control switch 303 controls the first air inlet 221 to disconnect from the air outlet 102 and controls the second air inlet 231 to connect with the air outlet 102; the second control switch 270 controls the throttle valve 250 to disconnect from the second evaporator 230.

[0059] When the dryer is first started, the air temperature inside the dryer's duct is relatively low. At this time, the second control switch 270 disconnects the throttle valve 250 from the second evaporator 230. Within the heat pump system 200, the compressor 210 compresses the low-pressure gaseous refrigerant into a high-pressure gaseous refrigerant. The high-pressure gaseous refrigerant is then transported to the condenser 240, where it dissipates heat and becomes a high-pressure liquid refrigerant. The high-pressure liquid refrigerant then passes through the throttle valve 250, where its pressure decreases, becoming a low-pressure liquid refrigerant. This low-pressure liquid refrigerant enters the first evaporator 220, where it absorbs heat and becomes a low-pressure gaseous refrigerant. The low-pressure gaseous refrigerant flows back to the compressor 210, which again compresses it into a high-pressure gaseous refrigerant. This cycle repeats, causing the refrigerant to release heat and condense at the condenser 240, and evaporate and absorb heat at the first evaporator 220.

[0060] When the dryer is first started, the air temperature in the dryer's air duct is relatively low. At this time, only the air duct between the second evaporator 230 and the drum is connected. The air discharged from the air outlet 102 flows only to the second evaporator 230. Since the second evaporator 230 is disconnected from the expansion valve 250, there is no refrigerant flowing in the second evaporator 230. Therefore, the air discharged from the air outlet 102 only flows through the second evaporator 230 to the condenser 240 and is not cooled at the second evaporator 230. At the same time, since there is refrigerant flowing in the condenser 240, the air discharged from the air outlet 102 is heated at the condenser 240, which causes the air temperature in the air duct to rise rapidly, speeding up the drying speed and shortening the drying time.

[0061] In some embodiments, the dryer further includes a temperature detection device and a controller. The temperature detection device is used to detect the air temperature inside the drying drum 100. The temperature detection device, the first control switch 303, and the second control switch 270 are all electrically connected to the controller.

[0062] The temperature detection device may include a temperature sensor, an electronic thermometer, etc. The temperature sensor is electrically connected to the controller to transmit the temperature information inside the dryer 100 to the controller.

[0063] The controller is electrically connected to the first control switch 303 and the second control switch 270. The controller controls the first control switch 303 and the second control switch 270 based on the temperature information inside the dryer drum 100. For example, when the temperature inside the dryer drum 100 is lower than a preset temperature, the controller controls the first control switch 303 and the second control switch 270, causing the first control switch 303 to disconnect the first air inlet 221 from the air outlet 102 and to connect the second air inlet 231 to the air outlet 102, and causing the second control switch 270 to disconnect the throttle valve 250 from the second evaporator 230. For example, the preset temperature can be between 40°C and 50°C; specifically, the preset temperature can be 40°C, 45°C, or 50°C, etc.

[0064] When the temperature inside the dryer 100 is equal to or greater than the preset temperature, the controller controls the first control switch 303 to connect the first air inlet 221 to the air outlet 102 and to connect the second air inlet 231 to the air outlet 102; the controller also controls the second control switch 270 to connect the throttle valve 250 to the second evaporator 230. In this way, refrigerant flows in both the first evaporator 220 and the second evaporator 230. Part of the hot and humid air discharged from the air outlet 102 is cooled and condensed into moisture at the first evaporator 220, and the other part is cooled and condensed into moisture at the second evaporator 230. After being cooled by the first evaporator 220 and the second evaporator 230, the hot and humid air discharged from the dryer drum 100 can be cooled more effectively and condensed into moisture. This increases the dryness of the air returning from the heat pump system 200 to the dryer drum 100. The drier air can remove more moisture from the surface of the clothes, thereby speeding up the drying process and shortening the drying time.

[0065] Continue to refer to Figure 3 In some embodiments, the third air outlet 242 is connected to the air inlet side 101 through the third air duct 304. The dryer also includes a heater 400, which is used to heat the air in the third air duct 304.

[0066] The heater 400 may include an electric heating wire, an electromagnetic heater 400, etc. The heater 400 may be installed inside or outside the third air duct 304, as long as it can heat the air flowing through the third air duct 304. Preferably, the heater 400 includes an electric heating wire, which is installed inside the third air duct 304 to improve the heating effect on the air inside the third air duct 304.

[0067] After the air in the duct is heated by the condenser 240, the heater 400 heats the air again, which further increases the temperature of the hot dry air entering the dryer drum 100, thereby speeding up the drying process and shortening the drying time.

[0068] Furthermore, the heater 400 can also be electrically connected to the controller. The controller can also be used to control the heater 400 to operate when the temperature inside the dryer 100 is lower than the preset temperature; and to control the heater 400 to stop operating when the temperature inside the dryer 100 is equal to or greater than the preset temperature.

[0069] For example, when the dryer is first started, the air temperature in the dryer's air duct is lower than the preset temperature. At this time, the controller controls the first control switch 303 to disconnect the first air inlet 221 from the air outlet 102 and connect the second air inlet 231 to the air outlet 102. The controller also controls the second control switch 270 to close the first pipe 260. The controller also controls the heater 400 to make the heater 400 work.

[0070] The air discharged from the air outlet side 102 flows through the second evaporator 230 to the condenser 240. It does not participate in heat exchange at the second evaporator 230, but is only heated at the condenser 240. After the air is discharged from the condenser 240, it is further heated by the heater 400 in the third air duct 304, which raises the temperature of the air entering the drying drum 100 from the air inlet side 101, thereby speeding up the drying speed and shortening the drying time.

[0071] When the temperature inside the drying drum 100 is equal to or greater than the preset temperature, the controller controls the first control switch 303 to connect the first air inlet 221 to the air outlet 102 and to connect the second air inlet 231 to the air outlet 102. The controller also controls the second control switch 270 to connect the throttle valve 250 to the second evaporator 230. In addition, the controller controls the heater 400 to stop working, thereby reducing energy consumption while ensuring the drying speed.

[0072] Continue to refer to Figure 3 The aforementioned fan 500 is used to circulate air between the dryer 100 and the heat pump system 200. The fan 500 can be installed in the third air duct 304. Of course, the fan 500 can also be installed in the first air duct 301 between the air outlet side 102 and the air duct automatic adjustment device.

[0073] Continue to refer to Figure 1 and Figure 3 The dryer described above may also include a water tank 600, which may be located below the first evaporator 220 and the second evaporator 230 to collect the condensate flowing down from the first evaporator 220 and the second evaporator 230.

[0074] Continue to refer to Figure 1 and Figure 3 In some embodiments, the dryer may further include a drive device, which may include a motor 700. The motor 700 has a motor shaft that passes through the drying drum 100. The axis of the motor shaft may be collinear with the axis of the drying drum 100. The motor 700 drives the motor shaft to rotate, and the motor shaft drives the drying drum 100 to rotate. During the rotation of the drying drum 100, hot dry air can flow over all parts of the surface of the clothes, making the clothes dry more evenly.

[0075] In other embodiments, the driving device may include a motor 700 and a belt, which is sleeved on the outside of the dryer drum 100 and is connected to the motor 700 for transmission. The motor 700 drives the belt to rotate, thereby driving the dryer drum 100 to rotate.

[0076] In summary, the dryer of this embodiment includes a drying drum 100 and a heat pump system 200. The heat pump system 200 includes a compressor 210, a condenser 240, a throttling device, a first evaporator 220, and a second evaporator 230. The outlet of the compressor 210 is connected to the inlet of the condenser 240, the outlet of the condenser 240 is connected to the inlet of the throttling device, and the outlet of the throttling device is connected to the inlets of the first evaporator 220 and the second evaporator 230. The outlets of both the first evaporator 220 and the second evaporator 230 are connected to the outlets of the compressor 210. The inlet is connected; the first evaporator 220 has a first air inlet 221 and a first air outlet 222, the second evaporator 230 has a second air inlet 231 and a second air outlet 232, and the condenser 240 has a third air inlet 241 and a third air outlet 242. The first air outlet 222 and the second air outlet 232 are both connected to the third air inlet 241; the clothes dryer 100 has an air inlet side 101 and an air outlet side 102. The third air outlet is connected to the air inlet side 101, and the air outlet side 102 is connected to the first air inlet 221 and the second air inlet 231. With the above configuration, a portion of the hot and humid air discharged from the air outlet 102 is cooled and condensed into moisture at the first evaporator 220, and another portion is cooled and condensed into moisture at the second evaporator 230. After being cooled by the first evaporator 220 and the second evaporator 230, the hot and humid air discharged from the dryer drum 100 can be cooled more effectively and condensed into moisture, thereby increasing the dryness of the air returning from the heat pump system 200 to the dryer drum 100. The drier air can remove more moisture from the surface of the clothes, thus speeding up the drying process and shortening the drying time.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A clothes dryer, characterized in that, include: A clothes dryer and a heat pump system, wherein the heat pump system includes a compressor, a condenser, a throttling device, a first evaporator and a second evaporator, wherein the outlet of the compressor is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the throttling device, the outlet of the throttling device is connected to the inlets of the first evaporator and the second evaporator, and the outlets of the first evaporator and the second evaporator are both connected to the inlet of the compressor; The first evaporator has a first air inlet and a first air outlet, the second evaporator has a second air inlet and a second air outlet, the condenser has a third air inlet and a third air outlet, and both the first air outlet and the second air outlet are connected to the third air inlet; the clothes dryer has an air inlet side and an air outlet side, the third air outlet is connected to the air inlet side, and the air outlet side is connected to both the first air inlet and the second air inlet. The dryer also includes a temperature detection device and a controller, wherein the temperature detection device is used to detect the air temperature inside the drying drum; The air outlet side is connected to the first air inlet end through a first air duct, and the second air inlet end is connected to the first air duct through a second air duct. A first control switch is provided at the junction of the second air duct and the first air duct. The outlet of the throttling device is connected to the inlet of the second evaporator via a first pipe, and a second control switch is provided on the first pipe; the throttling device includes a throttling valve. The temperature detection device, the first control switch, and the second control switch are all electrically connected to the controller. When the temperature inside the drying drum is equal to or greater than the preset temperature, the controller controls the first control switch to connect the first air inlet to the air outlet and to connect the second air inlet to the air outlet; the controller also controls the second control switch to connect the throttle valve to the second evaporator.

2. The clothes dryer according to claim 1, characterized in that, The first control switch is used to control the connection or disconnection between the first air inlet and the air outlet, and to control the connection or disconnection between the second air inlet and the air outlet.

3. The clothes dryer according to claim 2, characterized in that, The third air outlet is connected to the air inlet via a third air duct. The dryer also includes a heater for heating the air in the third air duct.

4. The clothes dryer according to claim 3, characterized in that, The heater includes a heating wire disposed within the third air duct.

5. The clothes dryer according to claim 3, characterized in that, The heater is electrically connected to the controller.

6. The clothes dryer according to claim 3, characterized in that, The dryer also includes a fan for circulating air between the dryer drum and the heat pump system.

7. The clothes dryer according to claim 6, characterized in that, The fan is installed inside the third air duct.

8. The clothes dryer according to claim 1, characterized in that, The dryer also includes a water tank for collecting condensate from the first evaporator and the second evaporator.

9. The clothes dryer according to claim 1, characterized in that, The dryer also includes a drive unit for driving the drying drum to rotate.

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