CN110670322A

CN110670322A - Clothes dryer and clothes drying method thereof

Info

Publication number: CN110670322A
Application number: CN201910830601.8A
Authority: CN
Inventors: 王黎明; 凌弋龙
Original assignee: Zhejiang Hui Sheng Heat Technology Co Ltd
Current assignee: Zhejiang Hui Sheng Heat Technology Co Ltd
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-01-10
Anticipated expiration: 2039-09-04
Also published as: CN110670322B

Abstract

The invention provides a clothes dryer and a clothes drying method thereof, and belongs to the technical field of clothes drying. The electric heating type clothes dryer solves the problems that an existing electric heating type clothes dryer is high in energy consumption and not environment-friendly. The invention comprises a case and a heat pump unit, wherein a drying cavity is arranged in the case, a roller is arranged in the drying cavity, a first air channel and a second air channel are also arranged in the case, the heat pump unit comprises a compressor, a condenser group and an evaporator, the condenser group comprises a first condenser and a second condenser, the first condenser and the second condenser are arranged in parallel, a valve is arranged between the second condenser and the compressor, the evaporator and the first condenser are arranged in the first air channel and are sequentially arranged along the air flow direction of the first air channel, the second condenser is arranged in the second air channel, and the cold quantity released by the evaporator in unit time is less than the total heat quantity released by the first condenser and the second condenser. The invention has the advantages of full-closed internal circulation type drying, high heating efficiency, high clothes drying efficiency, energy saving and environmental protection.

Description

Clothes dryer and clothes drying method thereof

Technical Field

The invention belongs to the technical field of clothes drying, and particularly relates to a clothes dryer and a clothes drying method thereof.

Background

At present, a common clothes dryer in the market is mainly an electric heating clothes dryer, the electric heating clothes dryer increases the air temperature in an electric heating mode, hot air flows across the surface of clothes under the action of a fan, moisture on the clothes is taken away through heat and moisture exchange and moisture evaporation promotion, and accelerated drying of the clothes is realized; the electric heating type clothes dryer occupies most market share due to simple structure and low price, but the electric heating type clothes dryer directly uses the electric heating wire to heat air, consumes a large amount of electric energy, and directly discharges high-temperature and high-humidity air flow of clothes into a room, so that heat and humidity pollution can be caused to the room.

Disclosure of Invention

The invention aims to overcome the defects of the conventional electric heating clothes dryer, and provides the clothes dryer which is capable of drying clothes by adopting a heat pump unit, drying in a totally-enclosed internal circulation mode, realizing high heating efficiency, synchronously dehumidifying during heating, dehumidifying at constant temperature, having high clothes drying efficiency, saving energy and protecting environment.

The purpose of the invention can be realized by the following technical scheme:

a clothes dryer comprises a machine case and a heat pump unit arranged in the machine case, wherein a drying cavity is arranged in the machine case, a roller for containing clothes is arranged in the drying cavity, the roller can rotate under the drive of a drive mechanism, a plurality of vent holes are distributed on the roller, the drying cavity is provided with an air inlet and an air outlet, a first air channel and a second air channel which are communicated with the drying cavity are also arranged in the machine case, the air inlet ends of the first air channel and the second air channel are communicated with the air outlet, the air outlet ends of the first air channel and the second air channel are communicated with the air inlet, a plurality of fans which can enable air to circularly flow in the drying cavity, the first air channel and the second air channel are also arranged in the machine case, the heat pump unit comprises a compressor, a condenser unit and an evaporator which are connected in a closed loop mode through refrigerant pipelines, the condenser unit comprises a first condenser and a second condenser, and the first condenser and the, and a valve for enabling the second condenser and the compressor to be switched on and off is further arranged between the second condenser and the compressor, the evaporator and the first condenser are arranged in the first air channel and are sequentially arranged along the air flow direction of the first air channel, the evaporator is close to the first condenser, the second condenser is arranged in the second air channel, and the cold quantity released by the evaporator in unit time is less than the total heat quantity released by the first condenser and the second condenser. The double condensers release heat, the heating efficiency is high, the temperature rise is fast, and meanwhile, the evaporators can condense air to perform dehumidification, so that when the three are in working states, the air is in a fast heating state, and the dehumidification is performed synchronously in the heating process, and the clothes drying efficiency is high; when the clothes are heated to a certain temperature, the valve is closed, the second condenser stops working, the heating speed can be greatly reduced, even the temperature is not increased or reduced, the clothes are in a pure dehumidification mode at the moment, air is quickly dried, the drying efficiency is ensured, the energy consumption is reduced, the clothes fibers can be prevented from being damaged due to overhigh temperature, and the clothes maintaining effect is achieved; the whole machine body is internally circulated in a closed manner in the working process, no damp and hot waste gas is discharged, and the machine body has the effect of environmental protection.

In the clothes dryer, the cold energy released by the evaporator per unit time is larger than or close to the heat released by the first condenser. When the cold energy released by the first evaporator is close to the heat energy released by the first condenser, the cold energy released by the evaporator is balanced by the heat energy of the first condenser due to the mutual balance action of the evaporator and the first condenser, so that the temperature of the air passing through the evaporator and the first condenser is not changed greatly or is changed slowly, and constant-temperature dehumidification can be realized.

In the above dryer, an auxiliary heating device is further disposed in the cabinet. The auxiliary heating device can perform auxiliary heating in a heating stage or a pure dehumidification stage, and is favorable for improving the drying efficiency.

In the above-mentioned one clothes dryer, the auxiliary heating device is an electric heater.

In the clothes dryer, the fans are divided into the first fan and the second fan, the first fan is arranged in the first air channel, and the second fan is arranged in the second air channel. The double-fan setting accelerates air circulation, realizes rapid heating up and dehumidification, improves drying efficiency.

In the clothes dryer, the first fan and the second fan are both located at the air outlet.

In the above dryer, a temperature sensor is further disposed in the cabinet. The temperature sensor can feed back the temperature information of the air in the case, and the working mode is controlled by matching with the controller, so that the automation degree is improved.

In the above clothes dryer, a humidity sensor is further disposed in the cabinet. The humidity sensor can feed back the humidity information of air in the case, and the working mode is controlled by matching with the controller, so that the automation degree is improved.

In the above clothes dryer, an ozone generator is further arranged in the cabinet. The ozone generated by the ozone generator can sterilize and disinfect the clothes in the roller.

In the above clothes dryer, the first condenser and the second condenser are disposed at the air inlet.

In the above clothes dryer, the air inlet is disposed at the top of the drying chamber, and the air outlet is disposed at the bottom of the drying chamber.

In the above clothes dryer, the first air duct and the second air duct are respectively arranged at two sides of the drying cavity.

In the above clothes dryer, the cabinet is divided into an upper part and a lower part which are separately arranged up and down, the upper part is detachably fixed on the lower part, the evaporator, the first condenser and the second condenser are arranged in the upper part, and the drum is arranged in the lower part. The case is arranged in a split manner, so that the assembly is convenient.

In the clothes dryer, the clothes dryer further comprises a self-cleaning device, the self-cleaning device comprises an upper water tank and a lower water tank which are arranged from top to bottom, and a water spraying device connected with the lower water tank, the upper water tank and the lower water tank are communicated from top to bottom and are separated by a filtering device, the self-cleaning device further comprises a water receiving tank arranged below the evaporator, a water outlet is formed in the water receiving tank, the water outlet is connected with the upper water tank through a water pipe, the lower water tank is connected with the water spraying device through a water pump, and a feedback device used for feeding back the blocking condition of the filtering device is further arranged on the upper water tank. The self-cleaning device can clean the evaporator, and the normal work of the evaporator is ensured.

In the above-mentioned clothes dryer, the filtering device is detachably disposed. The filtering device is detachable and convenient to clean or replace.

In the above-mentioned clothes dryer, the filtering device is a first filtering net.

In the above clothes dryer, the feedback device is a first liquid level sensor or a first liquid level switch for detecting when the upper water tank reaches a high water level. Whether the first filter screen is blocked or not is reflected by detecting whether the water level in the upper water tank reaches a high water level or not, namely, if the filter screen is seriously blocked, the water passing speed is low, and the water level in the upper water tank quickly rises and can quickly rise to the high water level.

In the above clothes dryer, the first liquid level sensor or the first liquid level switch is electrically connected to a blockage alarm device. The first liquid level sensor or the first liquid level switch is communicated with the blockage alarm device, and when the high water level is reached, the blockage alarm device gives an alarm to remind of cleaning the filter device.

In the clothes dryer, a second liquid level sensor or a second liquid level switch for detecting that the lower water tank reaches a low water level is further arranged in the lower water tank. The liquid level condition of the lower-layer water tank can be reflected through the second liquid level sensor or the second liquid level switch, and the water pump is prevented from being pumped out in a dry mode.

In the above clothes dryer, the second liquid level sensor or the second liquid level switch is electrically connected to a water shortage alarm device. The second liquid level sensor or the second liquid level switch is communicated with the water shortage alarm device, and the water shortage alarm device can give an alarm when the lower-layer water tank is at a low water level, so that the water pump is prevented from being damaged by dry pumping.

In the clothes dryer, the upper-layer water tank is further provided with an overflow port, the overflow port is provided with a second filter screen, and the overflow port is communicated with the lower-layer water tank through a water pipe. The overflow port can assist in filtering the condensed water.

In the above clothes dryer, the water spraying device includes a plurality of nozzles, one side of the evaporator is an air inlet side, the other side of the evaporator is an air outlet side, and the nozzles are located on the air inlet side of the evaporator.

In the clothes dryer, the spray head is positioned above the evaporator, and the spray head is inclined downwards to face the evaporator.

In the clothes dryer, the clothes dryer further comprises a controller, and the controller is electrically connected with the heat pump unit, the temperature sensor, the humidity sensor and the ozone generator.

In the clothes dryer, a machine door is arranged on the machine case, a contact switch is arranged at the machine door, and the contact switch is electrically connected with the controller.

In the clothes dryer, the driving mechanism is a motor, and the motor is in transmission connection with the drum through a belt assembly.

In the above clothes dryer, the controller is a PLC controller.

A drying method of a clothes dryer, comprising the steps of:

firstly, clothes to be dried are put into a roller, a heat pump unit works, the valve is in an open state, the roller rotates, an evaporator absorbs heat, a first condenser and a second condenser release heat, air in a first air channel is cooled by the evaporator and then heated by the first condenser and then flows into a drying cavity, air in a second air channel is heated by the second condenser and then flows into the drying cavity, the air in the drying cavity flows into the roller through a vent hole and then flows out of the roller, and finally flows into the first air channel and the second air channel from an air outlet respectively, and the temperature of the air is continuously increased in a circulating flow process;

when the temperature sensor detects that the temperature of the air reaches a set value, the valve is closed, the second condenser stops working, the evaporator continues absorbing heat, the first condenser continues releasing heat, the air in the first air channel is cooled by the evaporator, heated by the first condenser and then flows into the drying cavity, and the air is kept at a constant temperature in the circulating flow process;

and thirdly, when the humidity sensor detects that the humidity of the air reaches a set value, the ozone generator works to generate ozone.

Compared with the prior art, the invention has the advantages that:

1. the double condensers heat, the temperature can be raised quickly, the heating efficiency is high, the moisture is dried quickly, the evaporators dry the air while heating, and the drying efficiency is high;

2. the two condensers are arranged in parallel, the second condenser can be independently closed through a valve, excessive temperature rise is prevented, constant temperature or slow temperature reduction can be kept, a dehumidification mode is entered, the energy consumption is greatly reduced while the drying effect is ensured, and meanwhile, the clothes maintenance effect is achieved;

3. the auxiliary heating device is arranged, auxiliary heating is carried out in a heating stage or a dehumidifying stage, and the drying efficiency is improved;

4. the totally-enclosed internal circulation mode is adopted, and no damp and hot waste gas and other gases are discharged, so that the environment is protected;

5. the ozone generator is arranged to sterilize and disinfect the clothes;

6. the temperature and humidity conditions in the working process are monitored through detection elements such as a temperature sensor and a humidity sensor, the intervention time of each work is controlled, and the automation degree is high;

7. the intervention of ozone is carried out according to the air humidity, so that the clothes are prevented from being oxidized and damaged due to overhigh water content, and meanwhile, the sterilization effect is prevented from being reduced due to overlow water content;

8. when dehumidification is carried out at constant temperature, ozone is introduced at high temperature, so that the ozone can be better blended into clothes, and the sterilization effect is better;

9. the self-cleaning device can clean the evaporator, and the normal work of the evaporator is ensured.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

FIG. 3 is a schematic diagram of heat pump unit connections.

FIG. 4 is a schematic diagram of a self-cleaning apparatus.

In the figure, 1, upper part; 2. a lower portion; 3. a drying cavity; 4. an arc-shaped plate; 5. an air inlet; 6. an air outlet; 7. a first air duct; 8. a second air duct; 9. a first fan; 10. a second fan; 11. a drum; 12. a refrigerant pipeline; 13. a compressor; 14. an expansion valve; 15. an evaporator; 16. a first condenser; 17. a second condenser; 18. a valve; 19. an upper water tank; 20. a lower water tank; 21. a filtration device; 22. a water pump; 23. a water receiving tank; 24. a first liquid level switch; 25. a second liquid level switch; 26. an overflow port; 27. a spray head; 28. a machine door; 29. a contact switch.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in figures 1 and 2, the clothes dryer provided by the invention comprises a machine case, a heat pump unit and a controller, wherein the heat pump unit and the controller are arranged in the machine case, the machine case is divided into an upper part 1 and a lower part 2 which are separately arranged up and down, the upper part 1 is detachably fixed on the lower part 2 through a threaded fastener, the inner parts of the upper part 1 and the lower part 2 are communicated, an oval drying cavity 3 is arranged in the machine case, the drying cavity 3 is positioned in the lower part 2 and is formed by enclosing two arc-shaped plates 4, an air inlet 5 is arranged at the top of the drying cavity 3, an air outlet 6 is arranged at the bottom of the drying cavity 3, a first air duct 7 and a second air duct 8 are respectively arranged at two sides of the drying cavity 3, the first air duct 7 is positioned at the left side of the drying cavity 3, the second air duct 8 is positioned at the right side of the drying cavity 3, the air inlet ends of the first, the air inlet department in first wind channel 7 is equipped with first fan 9, the air inlet department in second wind channel 8 is equipped with second fan 10, first fan 9 and second fan 10 are located the bottom department of lower part 2 and blow up, the air flows down in stoving chamber 3, divide into two the tunnel respectively and flow into in first wind channel 7 and the second wind channel 8 after flowing out from the air outlet 6 of 3 bottoms in stoving chamber, the air in first wind channel 7 and second wind channel 8 flows upwards, and finally assemble again and flow into stoving chamber 3 from the air intake 5 at 3 tops in stoving chamber.

A roller 11 for placing clothes is arranged in the drying cavity 3, the roller 11 is concentric with the drying cavity 3, a gap is reserved between the periphery of the roller 11 and the two arc-shaped plates 4, a plurality of ventilation holes are uniformly distributed on the circumference of the roller 11, and air in the drying cavity 3 can enter the roller 11 through the ventilation holes; the roller 11 is connected with the motor through a belt assembly in a transmission mode, the belt assembly and the motor are both located on the back face of the case, and the belt assembly comprises a driving wheel, a driven wheel and a belt connected with the driving wheel and the driven wheel.

As shown in fig. 3, the heat pump unit mainly includes a compressor 13, a condenser set, an expansion valve 14, an evaporator 15, etc. connected in a closed loop by a refrigerant pipeline 12, a refrigerant, such as freon, flows through the refrigerant pipeline 12, the condenser set includes a first condenser 16 and a second condenser 17 arranged in parallel, i.e. the refrigerant inlets of the first condenser 16 and the second condenser 17 are both connected with the refrigerant outlet of the compressor 13, the refrigerant outlets of the first condenser 16 and the second condenser 17 are both connected with the expansion valve 14, a valve 18 for connecting or disconnecting the first condenser 16 and the compressor 13 is further arranged on the refrigerant pipeline 12 between the two, and the valve 18 may be an electromagnetic valve: the compressor 13 compresses the high-temperature low-pressure gaseous refrigerant into a high-temperature high-pressure gaseous refrigerant, when the electromagnetic valve is in an open state, the refrigerant is divided into two paths, the two paths of refrigerant respectively enter the first condenser 16 and the second condenser 17 for heat dissipation, the high-temperature high-pressure gaseous refrigerant after heat dissipation becomes a low-temperature high-pressure liquid refrigerant, the two paths of refrigerant are merged into one path again, the pressure is released by the expansion valve 14, the evaporator 15 absorbs heat, the two paths of refrigerant become the high-temperature low-pressure gaseous refrigerant, and finally the refrigerant returns. In this process, the first condenser 16 and the second condenser 17 heat up the ambient air, and the evaporator 15 cools down the ambient air. The compressor 13 is located outside the case and is installed on the lower portion 2, and the heat pump unit further includes other accessory components such as a dry filter and a liquid storage device.

As shown in fig. 2, the first condenser 16, the second condenser 17 and the evaporator 15 are all located in the upper portion 1 of the cabinet, the first condenser 16 and the evaporator 15 are located in the first air duct 7 on the left side, the evaporator 15 is located on the left side of the first condenser 16 and is close to the first condenser 16, according to the air flow direction, air is cooled through the evaporator 15, then heated through the first condenser 16, and then flows into the drying chamber 3, the second condenser 17 is located in the second air duct 8 on the right side, and air is heated through the second condenser 17 and then flows into the drying chamber 3.

In the unit time, because the heat quantity released by the first condenser 16 and the second condenser 17 is larger than the cold quantity released by the evaporator 15, when the first condenser 16, the second condenser 17 and the evaporator 15 are all in the working state, the air is in the continuous heating state in the circulating flow process.

In unit time, the cold quantity released by the evaporator 15 is slightly larger than or equal to or close to the heat quantity released by the first condenser 16, therefore, when the electromagnetic valve is closed, the second condenser 17 stops working, and the air is in a state of not increasing temperature and maintaining temperature balance or slowly reducing temperature in the circulation flowing process, and the dehumidification mode is adopted.

The machine case is also internally provided with an auxiliary heating device which is an electric heater, the electric heater can be arranged in the first air duct 7, the second air duct 8 or the drying cavity 3, and the electric heater can intermittently work in the heating stage in the previous stage or the dehumidifying stage in the later stage according to the requirement.

The machine case is also internally provided with a humidity sensor for detecting air humidity and a temperature sensor for detecting air temperature, the temperature sensor and the humidity sensor can be arranged at any position such as the inside of the first air channel 7, the inside of the second air channel 8 or the inside of the drying cavity 3, and the air inlet 5 is preferably selected.

The machine case is also provided with an ozone generator which generates ozone, the ozone is brought into the roller 11 through air circulation flow, so that clothes in the roller 11 can be sterilized and disinfected, the ozone generator can also be arranged in any position such as the first air duct 7, the second air duct 8 or the drying cavity 3, and the air inlet 5 is preferably selected.

The machine case is also internally provided with a self-cleaning device, as shown in fig. 4, the self-cleaning device comprises an upper water tank 19 and a lower water tank 20 which are arranged up and down and a water spraying device connected with the lower water tank 20, the upper water tank 19 and the lower water tank 20 are communicated up and down and are separated by a filtering device 21, the upper water tank 19 and the lower water tank 20 are detachably connected up and down, the filtering device 21 is a first filter screen which is detachably fixed at the bottom of the upper water tank 19 or at the top of the lower water tank 20, and the lower water tank 20 is connected with the water spraying device through a water pump 22.

Upper water tank 19 is used for collecting the comdenstion water, and the below of evaporimeter 15 is equipped with a water receiving tank 23, and the cross section of water receiving tank 23 is narrow structure down wide, and water receiving tank 23 extends along the length direction of evaporimeter 15, and the comdenstion water on the evaporimeter 15 is low naturally to fall to in the water receiving tank 23, and the lower of water receiving tank 23 is equipped with down the mouth of a river, and lower mouth of a river is connected to upper water tank 19 of below through a water pipe, and the comdenstion water leads to pipe and flows in upper water tank 19.

The upper water tank 19 is also provided with a feedback device for feeding back the blockage condition of the first filter screen, the feedback device is a first liquid level switch 24, the first liquid level switch 24 can be a floating ball type liquid level switch, according to the water flow speed of the first filter screen during normal filtration and the normal flow speed of the condensed water flowing out of the water receiving tank 23, the water level in the upper layer water tank 19 has a water level interval during normal filtration, when the filter screen is blocked, the water level in the upper water tank 19 can quickly rise, the water level in the water tank can be higher than the water level interval and is in a high water level state, the first liquid level switch 24 is used for detecting whether the upper water tank 19 reaches the high water level, the first liquid level switch 24 is electrically connected with the controller, the controller is electrically connected with a blocking alarm device, when the upper water tank 19 reaches a high water level, the first liquid level switch 24 is triggered, the blockage alarm device gives an alarm, and the first filter screen is reminded to be cleaned.

Still be equipped with second liquid level switch 25 in lower floor's water tank 20, second liquid level switch 25's effect is used for detecting whether lower floor's water tank 20 reaches the low water level, it is greater than the filtration velocity of flow (first filter screen blocks up or water pump 22 draws water too fast) to draw water when water pump 22, water level in lower floor's water tank 20 can descend fast, cross lowly or when not having water when the water level, water pump 22 can be taken out futilely, the water pump 22 can be damaged to the time overlength of taking out futilely, 24 electric connection controllers of first liquid level switch, a controller is electric connection water shortage alarm device still, when lower floor's water tank 20 reaches the low water level, trigger second liquid level switch 25, the alarm device of water shortage reports to.

An overflow port 26 is further arranged on the upper-layer water tank 19, a second filter screen is arranged at the position of the overflow port 26, the overflow port 26 is communicated with the lower-layer water tank 20 below through a water pipe, and the overflow port 26 is located below the high water level when the first liquid level switch 24 is triggered.

The water spraying device comprises a plurality of spray heads 27 which are sequentially arranged along the length direction of the evaporator 15 at equal intervals, one side of the evaporator 15 is an air inlet side, the other side of the evaporator 15 is an air outlet side, the spray heads 27 are positioned on the air inlet side of the evaporator 15 and above the evaporator 15, the spray heads 27 incline downwards to face the evaporator 15, the inclination angle of the spray heads 27 is preferably 45 degrees, and the sprayed water lifts 50 cm.

The controller can be a PLC controller, and is electrically connected with the heat pump unit, the temperature sensor, the humidity sensor, the ozone generator and the like to control the devices to work coordinately.

The front side of the cabinet is provided with a machine door 28, the machine door 28 is used for opening and closing the roller 11, a contact switch 29 is arranged at the machine door 28, the contact switch 29 is electrically connected with the controller, when the machine door 28 is opened, the machine door 28 is contacted with the contact switch 29, the controller controls the clothes dryer to stop and stop working, and therefore accidents caused by mistaken door opening in the clothes dryer working process are prevented.

The clothes drying method of the clothes dryer comprises the following steps: firstly, opening a machine door 28, putting clothes to be dried into a roller 11, then closing the machine door 28, starting up, operating a heat pump unit, wherein a valve 18 is in an open state, the roller 11 rotates, a first fan 9 and a second fan 10 work, an evaporator 15 absorbs heat, a first condenser 16 and a second condenser 17 release heat, air in a first air channel 7 is cooled by the evaporator 15, then is heated by the first condenser 16 and then flows into a drying cavity 3, air in a second air channel 8 is heated by the second condenser 17 and then flows into the drying cavity 3, air flowing out of the first air channel 7 and the second air channel 8 is mixed in the drying cavity 3 and enters the roller 11 from a vent hole of the roller 11 to exchange heat with the clothes in the roller 11, water vapor is emitted from the heated clothes and is mixed with hot air to form damp and hot air, and the damp and hot air flows downwards in the roller 11 under the action of the fans, and the wet and hot air flows out from the air outlet 6 of the drying cavity 3, under the action of the first fan 9 and the second fan 10, the wet and hot air is divided into two paths and respectively enters the first air channel 7 and the second air channel 8, the wet and hot air entering the first air channel 7 is condensed and dehumidified by the evaporator 15, then is heated by the first condenser 16 and then flows into the drying cavity 3 again, the wet and hot air entering the second air channel 8 directly enters the air again after being heated by the second condenser 17, and meanwhile, the electric heater can synchronously start auxiliary heating according to requirements.

Secondly, when the temperature sensor detects that the temperature of the air is heated to a set value, for example, 80 ℃ or 90 ℃, the electromagnetic valve is closed to stop the second condenser 17, the evaporator 15 continues to absorb heat, the first condenser 16 continues to release heat, the first fan 9 continues to work, and the second fan 10 can be stopped or can also continue to work, at this time, a simple dehumidification mode is entered, the hot and humid air flowing out of the drying cavity 3 firstly passes through the condenser to be cooled and dehumidified, then passes through the first condenser 16 to be heated, and then flows into the drying cavity 3 again, because the second condenser 17 does not work, if the cold and heat release amount of the evaporator 15 and the first condenser 16 in unit time is close, a constant temperature dehumidification state is entered, namely, the air is always maintained in a relatively stable or slightly changed temperature range in the circulation process, if the cold amount released by the evaporator 15 in unit time is slightly larger than the heat released by the first, the temperature of the air slowly drops during the cycle.

Thirdly, when the humidity sensor detects that the humidity of the air reaches a first set value, the moisture content of the air is preferably 40% -50%, the ozone generator works to generate ozone, and the ozone enters the drum 11 through air circulation to sterilize and disinfect the clothes in the drum 11.

And fourthly, when the humidity sensor detects that the humidity of the air reaches a second set value, the preferred air moisture content of the second set value is below 5%, stopping the machine, and finishing drying.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be interpreted in an open-ended sense, i.e., in a sense equivalent to "including at least … …", and not in a closed sense, i.e., in a sense not to be interpreted as "including only … …".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Claims

1. The clothes dryer is characterized by comprising a machine case and a heat pump unit arranged in the machine case, wherein a drying cavity (3) is arranged in the machine case, a roller (11) used for containing clothes is arranged in the drying cavity (3), the roller (11) can be driven by a driving mechanism to rotate, a plurality of ventilation holes are distributed in the roller (11), the drying cavity (3) is provided with an air inlet (5) and an air outlet (6), the machine case is also provided with a first air channel (7) and a second air channel (8) which are communicated with the drying cavity (3), the air inlet ends of the first air channel (7) and the second air channel (8) are communicated with the air outlet (6), the air outlet ends of the first air channel (7) and the second air channel (8) are communicated with the air inlet (5), the machine case is also provided with a plurality of fans, and the heat pump unit comprises a compressor (13) and a compressor (12) which are connected in a closed loop mode, The condenser group comprises a first condenser (16) and a second condenser (17), the first condenser (16) and the second condenser (17) are arranged in parallel, a valve (18) capable of enabling the first condenser (17) and the compressor (13) to be switched on and off is further arranged between the second condenser (17) and the compressor (13), the evaporator (15) and the first condenser (16) are arranged in the first air duct (7) and are sequentially arranged along the air flow direction of the first air duct (7), the second condenser (17) is arranged in the second air duct (8), and the cold quantity released by the evaporator (15) in unit time is smaller than the total heat quantity released by the first condenser (16) and the second condenser (17).

2. Laundry drying machine according to claim 1, characterized in that the cold released by the evaporator (15) per unit of time is greater than or close to the heat released by said first condenser (16).

3. Clothes dryer according to claim 1 or 2, characterized in that auxiliary heating means are also provided in said cabinet.

4. The clothes dryer according to claim 3, characterized in that the fans are divided into a first fan (9) and a second fan (10), the first fan (9) being disposed in the first air duct (7) and the second fan (10) being disposed in the second air duct (8).

5. The clothes dryer of claim 4 wherein a temperature sensor is further disposed within the cabinet.

6. The clothes dryer of claim 4 wherein a humidity sensor is further disposed within the cabinet.

7. The clothes dryer of claim 6 wherein an ozone generator is further disposed within the cabinet.

8. Laundry dryer according to any one of claims 5-7, characterized in that the cabinet is divided into an upper part (1) and a lower part (2) which are arranged separately from each other, the upper part (1) being detachably fixed to the lower part (2), the evaporator (15), the first condenser (16) and the second condenser (17) being arranged in the upper part (1), and the drum (11) being arranged in the lower part (2).

9. The clothes dryer according to any one of claims 5 to 7, characterized in that the clothes dryer further comprises a self-cleaning device, the self-cleaning device comprises an upper water tank (19) and a lower water tank (20) which are arranged up and down, and a water spraying device connected with the lower water tank (20), the upper water tank (19) and the lower water tank (20) are communicated up and down and are separated by a filtering device (21), the self-cleaning device further comprises a water receiving tank (23) arranged below the evaporator (15), the water receiving tank (23) is provided with a water outlet, the water outlet is connected with the upper water tank (19) through a water pipe, the lower water tank (20) is connected with the water spraying device through a water pump (22), and the upper water tank (19) is further provided with a feedback device for feeding back the blocking condition of the filtering device (21).

10. A clothes drying method of a clothes dryer is characterized by comprising the following steps:

firstly, clothes to be dried are put into a roller (11), a heat pump unit works, a valve (18) is in an open state, the roller (11) rotates, an evaporator (15) absorbs heat, a first condenser (16) and a second condenser (17) release heat, air in a first air channel (7) is cooled by the evaporator (15), then is heated by the first condenser (16) and then flows into a drying cavity (3), air in a second air channel (8) is heated by the second condenser (17) and then flows into the drying cavity (3), air in the drying cavity (3) flows into the roller (11) through a vent hole and then flows out of the roller (11), and finally flows into the first air channel (7) and the second air channel (8) again from an air outlet (6), and the air is continuously heated in a circulating flow process;

when the temperature sensor detects that the temperature of the air reaches a set value, the valve (18) is closed, the second condenser (17) stops working, the evaporator (15) continues absorbing heat, the first condenser (16) continues releasing heat, the air in the first air channel (7) is cooled by the evaporator (15), heated by the first condenser (16) and then flows into the drying cavity (3), and the air is kept at a constant temperature in the circulating flow process;