Clothes processing equipment and control method

Abstract

The invention provides clothes processing equipment and a control method, and belongs to the technical field of clothes processing. The clothes processing equipment comprises an outer cylinder and a drying assembly, a cylinder opening of the outer cylinder is provided with a drying air inlet, and the cylinder wall of the outer cylinder is provided with a drying air outlet; the drying assembly comprises a condensation air duct section, a heating air duct section, a fan and an auxiliary air duct. A fan blade cavity, a fan blade cavity air inlet, a fan blade cavity air outlet and a fan blade cavity ventilation opening are formed in the fan. The condensation air duct section communicates with the drying air outlet and the fan blade cavity air inlet, and the heating air duct section communicates with the fan blade cavity air outlet and the drying air outlet; the auxiliary air duct communicates with the fan blade cavity ventilation opening and the external environment, and auxiliary heating equipment and an air control mechanism are arranged in the auxiliary air duct; when the clothes processing equipment runs a drying program, the power of the auxiliary heating equipment and the air control mechanism are at least cooperatively adjusted according to the drying requirements of clothes at different drying stages; and the auxiliary heating equipment preheats the fresh air, so that the temperature difference between the environment fresh air and the condensation backflow air flow is reduced, and the drying efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of clothing treatment, and particularly relates to a clothing treatment device and a control method thereof. Background Art

[0002] Water-cooled clothes drying treatment devices usually achieve the drying air flow circulation through the coordinated action of a condensation air duct and a heating air duct. Specifically, the humid and hot drying air flow exchanges heat with condensed water in the condensation air duct to form a dry and cold drying air flow; then it is conveyed to the heating air duct by a blower, and is converted into a high-temperature dry gaseous medium by a heating element, and finally enters the outer cylinder to exchange heat with the clothes in the inner cylinder to remove moisture. However, as the drying process progresses, the humidity of the drying air flow continuously rises and the thermodynamic quality gradually deteriorates, resulting in a significant reduction in the heat conduction efficiency, prolonging the drying time and increasing the energy consumption.

[0003] In view of the above problems, the prior art proposes to add a fresh air channel between the heating air duct and the external environment of the device, and optimize the drying efficiency by introducing ambient fresh air to dilute the humidity of the drying air flow and improve the quality of the drying air flow. However, this solution has significant defects in practical applications: firstly, when the fresh air introduction amount is too large, the temperature gradient of the drying air flow will be unbalanced; secondly, when the temperature difference between the external fresh air and the high-temperature drying air flow is large (especially in a low-temperature environment), local low-temperature regions are easily formed after the two are mixed, resulting in uneven overall temperature distribution and a decrease in the average temperature of the drying air flow. This phenomenon not only weakens the drying efficiency of the drying air flow, but also forces the heating element to compensate more energy to maintain the target temperature, ultimately resulting in an increase in energy consumption and an extension of the drying cycle. Summary of the Invention

[0004] In view of this, the present invention provides a clothing treatment device and a control method thereof to solve the problems in the prior art that the flow rate and temperature of the introduced fresh air are not appropriate, resulting in uneven overall temperature distribution and a decrease in the average temperature of the drying air flow, and further reducing the drying efficiency, prolonging the drying cycle and increasing the drying energy consumption.

[0005] The present invention provides a clothing treatment device, and the clothing treatment device includes an outer cylinder and a drying assembly; a drying air inlet is provided at the mouth of the outer cylinder, and a drying air outlet is formed on the cylinder wall of the outer cylinder; the drying assembly includes a main air duct, a blower and a secondary air duct; the main air duct includes a condensation air duct section and a heating air duct section, and the blower forms a wind blade cavity, a wind blade cavity air inlet communicating with the wind blade cavity, a wind blade cavity air outlet and a wind blade cavity ventilation port;

[0006] The condensation air duct section communicates with the drying air outlet and the air inlet of the impeller chamber, and the heating air duct section communicates with the air outlet of the impeller chamber and the drying air inlet; the auxiliary air duct communicates with the ventilation opening of the impeller chamber and the external environment, and the auxiliary air duct is at least used to introduce fresh ambient air into the impeller chamber; an auxiliary heating device is arranged in the auxiliary air duct, and the auxiliary heating device is used to heat the fresh ambient air flowing through the auxiliary air duct, and the power of the auxiliary heating device is adjustable; a wind control mechanism is arranged in the auxiliary air duct or at one end of the auxiliary air duct close to the external environment, and the wind control mechanism is at least used to adjust the flow rate of the fresh ambient air flowing through the auxiliary air duct;

[0007] The auxiliary heating device and the wind control mechanism are configured to: when the laundry treatment device runs a drying program, at least cooperatively adjust the power of the auxiliary heating device and the wind control mechanism according to the drying requirements of the laundry in different drying stages;

[0008] Wherein, the external environment is the environment where the laundry treatment device is located, and the fresh ambient air is the air in the external environment.

[0009] Further optionally, the fan is a double-suction fan, and the fan includes a volute and an impeller; the volute encloses to form the impeller chamber, and the axial direction of the impeller chamber is the vertical direction; a ventilation opening of the impeller chamber is formed at the upper end of the axial direction of the impeller chamber, an air inlet of the impeller chamber is formed at the lower end of the axial direction of the impeller chamber, and an air outlet of the impeller chamber is formed on the side wall of the impeller chamber; the impeller is rotatably arranged in the impeller chamber.

[0010] Further optionally, the auxiliary air duct includes a first auxiliary air duct section and a second auxiliary air duct section arranged in sequence, the first auxiliary air duct section covers the ventilation opening of the impeller chamber, the second auxiliary air duct section is arranged behind the fan, and the ventilation opening of the impeller chamber, the first auxiliary air duct section and the second auxiliary air duct section are communicated in sequence; the flow area of the first auxiliary air duct section is larger than the flow area of the second auxiliary air duct section.

[0011] Further optionally, a through hole of the air duct section is formed at one end of the condensation air duct section close to the drying air outlet;

[0012] The drying assembly further includes a ventilation pipe, and the ventilation pipe includes a ventilation pipe air inlet end, a ventilation pipe air outlet end and a ventilation pipe main body; the ventilation pipe main body connects the ventilation pipe air inlet end and the ventilation pipe air outlet end, and the ventilation pipe main body is arranged in the condensation air duct section; the ventilation pipe air inlet end extends outward from the condensation air duct section through the through hole of the air duct section and communicates with the external environment, and the ventilation pipe air outlet end extends inward into the impeller chamber through the air inlet of the impeller chamber and communicates with the impeller chamber;

[0013] The ambient fresh air entering the ventilation pipe through the air inlet end of the ventilation pipe can exchange heat with the air flowing through the condensation air duct section, and enter the impeller cavity through the air outlet end of the ventilation pipe.

[0014] Further optionally, a main heating device is provided in the heating air duct section. The main heating device is used to heat the drying air flow flowing through the heating air duct section, and the power of the main heating device is adjustable;

[0015] The main heating device, the auxiliary heating device and the air control mechanism are configured to: when the clothing treatment device runs a drying program, at least according to the temperature of the ambient fresh air, the flow rate of the condensation return air flow and the temperature of the condensation return air flow, cooperate to adjust the power of the main heating device, the power of the auxiliary heating device and the air control mechanism;

[0016] Wherein, the condensation return air flow is the drying air flow entering the impeller cavity from the condensation air duct section.

[0017] Further optionally, a condensation water inlet is formed at one end of the condensation air duct section close to the air inlet of the impeller cavity. The condensation water inlet is used to convey condensation water to the condensation air duct section; a condensation water outlet is formed at one end of the condensation air duct section close to the drying air outlet. The condensation water outlet is used to output the condensation water in the condensation air duct section;

[0018] A heat exchange module is provided in the auxiliary air duct. The heat exchange module is formed with a first heat exchange channel and a second heat exchange channel, and the first heat exchange channel and the second heat exchange channel are arranged in an alternating manner; the first heat exchange channel includes a first heat exchange channel air inlet end and a first heat exchange channel air outlet end both communicated with the auxiliary air duct. The ambient fresh air in the auxiliary air duct can enter the first heat exchange channel through the first heat exchange channel air inlet end, and then enter the auxiliary air duct through the first heat exchange channel air outlet end;

[0019] The drying assembly further includes a pump provided outside the condensation air duct section; the condensation water outlet, the pump, the second heat exchange channel, the condensation water inlet and the condensation air duct section are sequentially communicated to form a condensation water loop; when the pump is running, the condensation water can circulate in the condensation water loop;

[0020] The condensation water flowing through the condensation air duct section exchanges heat with the drying air flow, and the condensation water flowing through the second heat exchange channel exchanges heat with the ambient fresh air flowing through the first heat exchange channel.

[0021] Further optionally, the power of the pump is adjustable;

[0022] The pump, the auxiliary heating device, and the air control mechanism are configured to: when the laundry treatment device runs a drying program, jointly adjust the power of the pump, the power of the auxiliary heating device, and the air control mechanism according to the temperature of the condensed water flowing through the pump, the temperature of the ambient fresh air, the flow rate of the condensed return air flow, and the temperature of the condensed return air flow; or,

[0023] The main heating device, the pump, the auxiliary heating device, and the air control mechanism are configured to: when the laundry treatment device runs a drying program, jointly adjust the power of the main heating device, the power of the pump, the power of the auxiliary heating device, and the air control mechanism according to the temperature of the condensed water flowing through the pump, the temperature of the ambient fresh air, the flow rate of the condensed return air flow, and the temperature of the condensed return air flow.

[0024] The present invention further provides a control method for a laundry treatment device, where the laundry treatment device is the laundry treatment device described in any one of the above; when the laundry treatment device runs a drying program, the control method includes:

[0025] According to the drying requirements of the laundry in different drying stages of the drying program, at least jointly adjust the power of the auxiliary heating device and the air control mechanism.

[0026] Further optionally, the step of according to the drying requirements of the laundry in different drying stages of the drying program, at least jointly adjusting the power of the auxiliary heating device and the air control mechanism includes:

[0027] Determine the current drying stage of the laundry treatment device;

[0028] When the current drying stage is the constant temperature dehumidification stage, control the opening of the auxiliary air duct and the operation of both the main heating device and the auxiliary heating device, and jointly adjust the rotation speed of the fan, the air control mechanism, and the power of the auxiliary heating device according to the humidity of the laundry, the temperature of the ambient fresh air, and the temperature of the condensed return air flow, so that the flow rate of the mixed air flow is within a preset flow rate range and the temperature of the mixed air flow is within a preset temperature range;

[0029] Wherein, the condensed return air flow is the drying air flow entering the impeller chamber from the condensed air duct section, and the mixed air flow is the air flow after mixing the ambient fresh air and the condensed return air flow entering the impeller chamber.

[0030] Further optionally, a main heating device is provided in the heating air duct section, and the main heating device is used to heat the drying air flow flowing through the heating air duct section, and the power of the main heating device is adjustable; the step of according to the drying requirements of the laundry in different drying stages of the drying program, at least jointly adjusting the power of the auxiliary heating device and the air control mechanism includes:

[0031] Determine the current drying stage of the laundry treatment device;

[0032] When the current drying stage is the constant temperature and dehumidification stage, control the opening of the auxiliary air duct and the operation of both the main heating device and the auxiliary heating device. According to the humidity of the clothes, the temperature of the ambient fresh air, and the temperature of the condensate return air flow, coordinately adjust the rotation speed of the fan, the air control mechanism, the power of the main heating device, and the power of the auxiliary heating device, so that the flow rate of the mixed air flow is within the preset flow rate range and the temperature of the mixed air flow after being heated by the main heating device is within the preset temperature range;

[0033] Wherein, the condensate return air flow is the drying air flow entering the impeller cavity from the condensate air duct section, and the mixed air flow is the air flow after mixing the ambient fresh air and the condensate return air flow entering the impeller cavity.

[0034] Further optionally, the clothing treatment device is provided with a fresh air mode and an exhaust mode; according to the drying requirements of the clothes in different drying stages of the drying program, at least coordinately adjusting the power of the auxiliary heating device and the air control mechanism further includes:

[0035] When the current drying stage is the heating and temperature rising stage, control the operation of the main heating device, control the closing of the auxiliary air duct and the stop of the auxiliary heating device;

[0036] When the current drying stage is the cooling and temperature dropping stage, control the stop of the main heating device and the auxiliary heating device and the opening of the auxiliary air duct, adjust the rotation speed of the fan, and control the clothing treatment device to alternately switch between the fresh air mode and the exhaust mode;

[0037] Wherein, the maximum rotation speed of the fan in the cooling and temperature dropping stage is lower than the minimum rotation speed of the fan in the constant temperature and dehumidification stage; when the clothing treatment device is in the fresh air mode, the ambient fresh air enters the impeller cavity through the auxiliary air duct and then enters the heating air duct; when the clothing treatment device is in the exhaust mode, the drying air flow in the outer cylinder sequentially flows through the condensate air duct section, the impeller cavity, and the auxiliary air duct and is discharged to the external environment.

[0038] Compared with the prior art, the beneficial effects of the present invention mainly lie in:

[0039] (1)Precisely control the fresh air flow rate and temperature; by dynamically adjusting the flow area of the auxiliary air duct, the introduced ambient fresh air volume can be accurately controlled, avoiding excessive fresh air from diluting the temperature of the drying air flow in the heating air duct section, while ensuring the humidity dilution effect; the auxiliary heating device pre-heats the ambient fresh air, reduces the temperature difference between the fresh air and the high-temperature drying air flow in the heating air duct section, reduces the temperature fluctuation of the drying air flow after mixing, and maintains the thermodynamic quality required for drying; solve the problems in the prior art that excessive fresh air introduced causes the temperature imbalance of the drying air flow or too little fresh air introduced causes poor humidity dilution effect, and solve the problem in the prior art that the fresh air introduced is not heated, resulting in a low temperature of the drying air flow after mixing and a poor drying effect;

[0040] (2)Optimize the drying efficiency in stages; the control module intelligently adjusts the ambient fresh air flow rate and the power of the auxiliary heating device according to the drying stage (such as high humidity in the initial stage and low humidity in the later stage): for example, in the stage of high humidity of the clothes, increase the fresh air flow rate of the drying air flow to quickly dilute the humid and hot drying air flow, and the auxiliary heating power is synchronously increased to avoid a sudden drop in the temperature of the humid and hot drying air flow; in the stage of low humidity of the clothes, reduce the ambient fresh air flow rate to reduce energy consumption, and the power of the auxiliary heating device is correspondingly reduced;

[0041] (3)Improve the energy consumption efficiency and drying uniformity; when the pre-heated ambient fresh air is mixed with the environment in the heating air duct section, the temperature gradient decreases, reducing the additional energy consumption of the main heating device; the temperature distribution of the drying air flow is more uniform, avoiding uneven heating of the clothes caused by local low-temperature areas, and improving the drying efficiency and drying quality. Description of the Drawings

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0043] The structures, ratios, sizes, etc. shown in this specification are only used to cooperate with the content disclosed in the specification for those who are familiar with this technology to understand and read, and are not used to limit the limited conditions under which the present invention can be implemented. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that the technical content disclosed by the present invention can cover.

[0044] Figure 1 Schematic structural diagram of an embodiment of the clothes treatment device provided by the present invention;

[0045] Figure 2aSchematic diagram of the assembly structure of the upper volute and the auxiliary air duct provided by the present invention;

[0046] Figure 2b Schematic sectional view of the assembly structure of the upper volute, the impeller and the auxiliary air duct provided by the present invention;

[0047] Figure 3 Schematic diagram of the assembly structure of the drying component provided by the present invention;

[0048] Figure 4 Schematic diagram of the assembly structure of the auxiliary air duct provided by the present invention;

[0049] Figure 5 Schematic diagram of the structure of the air control baffle and the transmission component provided by the present invention;

[0050] In the figure:

[0051] 11 - outer cylinder; 12 - door seal; 13 - box body;

[0052] 21 - condensation air duct section; 22 - heating air duct section; 23 - auxiliary air duct; 231 - first auxiliary air duct section; 232 - second auxiliary air duct section; 24 - auxiliary heating device; 25 - mounting seat; 26 - ambient fresh air flow path;

[0053] 3 - fan; 31 - impeller cavity; 32 - impeller cavity air inlet; 33 - impeller cavity air outlet; 34 - impeller cavity ventilation opening; 35 - impeller; 361 - upper volute main body; 362 - upper volute air outlet section; 371 - lower volute main body; 372 - lower volute air outlet section;

[0054] 4 - air control mechanism; 41 - air control baffle; 42 - rack; 43 - gear;

[0055] 51 - ventilation pipe main body; 52 - ventilation pipe air inlet end; 53 - ventilation pipe air outlet end. Detailed implementation manners

[0056] The following specific embodiments illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0057] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a", "the" and "said" used in the embodiments of the present invention and the appended claims are also intended to include the plural forms unless the context clearly dictates otherwise. The term "plural" generally includes at least two, but does not exclude the case of including at least one.

[0058] It should be understood that the term "and / or" used herein is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: the existence of A alone, the simultaneous existence of A and B, and the existence of B alone. In addition, the character " / " herein generally indicates that the associated objects before and after are in an "or" relationship.

[0059] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a commodity or system comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such commodity or system. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the commodity or system comprising the said element.

[0060] In the prior art, a fresh air channel is added between the heating air duct and the external environment of the equipment, and the humidity of the drying air flow is diluted and the quality of the drying air flow is improved by introducing ambient fresh air, so as to optimize the drying efficiency; however, when the amount of introduced ambient fresh air is too large, the temperature of the drying air flow in the heating air duct will be unbalanced, and when the amount of introduced ambient fresh air is too small, the dilution effect on humidity is poor; at the same time, when the temperature difference between the ambient fresh air and the temperature of the drying air flow in the heating air duct is large, the temperature distribution of the drying air flow after mixing is uneven, the energy efficiency of the drying air is reduced, and the drying energy consumption is increased;

[0061] The present invention creatively provides a laundry treatment device, including an outer tub and a drying assembly. A drying air inlet is provided at the opening of the outer tub, and a drying air outlet is formed on the barrel wall of the outer tub. The drying assembly includes a main air duct, a fan, and a secondary air duct. The main air duct includes a condensation air duct section and a heating air duct section. The fan forms a wind blade cavity, a wind blade cavity air inlet, a wind blade cavity air outlet, and a wind blade cavity ventilation opening. The condensation air duct section communicates with the drying air outlet and the wind blade cavity air inlet, and the heating air duct section communicates with the wind blade cavity air outlet and the drying air outlet. The secondary air duct communicates the wind blade cavity ventilation opening with the external environment, and the secondary air duct can introduce ambient fresh air into the wind blade cavity. A secondary heating device is provided in the secondary air duct for heating the ambient fresh air flowing through the secondary air duct. A wind control mechanism is provided in the secondary air duct or at one end of the secondary air duct close to the external environment for adjusting the flow rate of the ambient fresh air flowing through the secondary air duct. When the laundry treatment device operates a drying program, at least the power of the secondary heating device and the wind control mechanism are coordinately adjusted according to the drying requirements of the laundry in different drying stages. The introduction amount of the ambient fresh air can be accurately controlled, and the secondary heating device pre-heats the fresh air, reducing the temperature difference between the ambient fresh air and the condensation return air flow, making the temperature distribution of the mixed air flow more uniform, and improving the drying efficiency.

[0062] Embodiment 1

[0063] <Laundry treatment device>

[0064] As Figures 1 to 5 shown, this embodiment provides a laundry treatment device, including an outer tub 11 and a drying assembly. A drying air inlet is provided at the opening of the outer tub 11, and a drying air outlet is formed on the barrel wall of the outer tub 11. The drying assembly includes a main air duct, a fan 3, and a secondary air duct 23. The main air duct includes a condensation air duct section 21 and a heating air duct section 22. The fan 3 forms a wind blade cavity 31, a wind blade cavity air inlet 32 communicating with the wind blade cavity 31, a wind blade cavity air outlet 33, and a wind blade cavity ventilation opening 34. A rotatable wind blade 35 is provided in the wind blade cavity 31, and the wind blade 35 can be controlled to rotate.

[0065] The condensation air duct section 21 communicates with the drying air outlet and the air inlet 32 of the impeller chamber. One end of the condensation air duct section 21 close to the air inlet 32 of the impeller chamber forms a condensation water inlet, which is used to convey condensed water to the condensation air duct section 21. The condensed water in the condensation air duct section 21 can enter the outer cylinder 11 through the drying air outlet and then be discharged from the outer cylinder 11 through a drain pipe communicated with the outer cylinder 11; the heating air duct section 22 communicates with the air outlet 33 of the impeller chamber and the drying air inlet, and a main heating device is arranged in the heating air duct section 22, and the main heating device is used to heat the drying air flow flowing through the heating air duct section 22; the auxiliary air duct 23 communicates with the air vent 34 of the impeller chamber and the external environment, and the auxiliary air duct is at least used to introduce ambient fresh air into the impeller chamber 31; that is, the ambient fresh air can enter the impeller chamber 31 through the auxiliary air duct 23, and then can be mixed with the condensation return air flow. The mixed air flow enters the heating air duct section through the air outlet 33 of the impeller chamber. The main heating device can heat the mixed air flow, and then the mixed air flow can enter the outer cylinder 11 through the drying air inlet; an auxiliary heating device 24 is arranged in the auxiliary air duct 23, and the auxiliary heating device 24 is used to heat the ambient fresh air entering the auxiliary air duct 23 and the power of the auxiliary heating device 24 is adjustable; a wind control mechanism 4 is arranged in the auxiliary air duct 23 or at one end of the auxiliary air duct 23 close to the external environment, and the wind control mechanism 4 is at least used to adjust the flow rate of the ambient fresh air flowing through the auxiliary air duct 23;

[0066] Wherein, the external environment is the environment where the laundry treatment device is located, and the ambient fresh air is the air in the external environment; the condensation return air flow is the drying air flow entering the impeller chamber 31 from the condensation air duct section 21, and the mixed air flow is the air flow after mixing the ambient fresh air entering the impeller chamber 31 and the condensation return air flow;

[0067] The auxiliary heating device 24 and the wind control mechanism 4 are configured to: when the laundry treatment device runs a drying program, at least cooperate to adjust the power of the auxiliary heating device 24 and the wind control mechanism 4 according to the drying requirements of the laundry in different drying stages;

[0068] Specifically, the laundry treatment device further includes a cabinet 13 and an inner cylinder; a cabinet ventilation opening is formed on the rear side wall of the cabinet 13, the outer cylinder 11 is arranged in the cabinet 13, and the axis of the outer cylinder 11 is along the front-rear direction; a door seal 12 is arranged at the opening of the outer cylinder 11, and a drying air inlet is formed at the upper end of the door seal 12; the barrel wall of the outer cylinder 11 includes an outer cylinder peripheral wall and an outer cylinder rear wall, the outer cylinder peripheral wall is circular, the front end of the outer cylinder peripheral wall forms the opening of the outer cylinder 11, the outer cylinder rear wall is arranged at the rear end of the outer cylinder peripheral wall, and the lower end of the outer cylinder rear wall forms a drying air outlet; the inner cylinder is rotatably arranged in the outer cylinder 11 and is used to carry laundry; the air vent 34 of the impeller chamber and the cabinet ventilation opening are communicated through the auxiliary air duct 23, and the auxiliary air duct 23 is arranged on the cabinet 13; both the condensation air duct section 21 and the heating air duct section 22 are arranged outside the outer cylinder. The condensation air duct section 21 is arranged at the rear side of the outer cylinder rear wall, and the heating air duct section 22 is arranged at the top of the outer cylinder peripheral wall;

[0069] Fresh ambient air can enter the secondary air duct 23 through the ventilation opening of the box body, and then enter the impeller cavity 31 through the ventilation opening 34 of the impeller cavity; the secondary heating device 24 is a power heating element such as a PTC or an electric heating element, and the secondary heating device 24 is arranged in the secondary air duct 23 through the mounting seat 25; the fresh ambient air is heated by the secondary heating device 24 to reduce the influence of the fresh ambient air on the condensate reflux air flow, and ensure that the temperature change of the drying air flow in the heating air duct section 22 is maintained within a small range when introducing fresh ambient air.

[0070] The outer cylinder 11, the inner cylinder, the condensate air duct section 21, the impeller cavity 31 and the heating air duct section 22 are sequentially connected to form a drying air flow loop; when there is no need to introduce fresh ambient air, the impeller 35 is controlled to rotate, and the drying air flow can circulate in the drying loop; the drying air flow in the outer cylinder 11 enters the condensate air duct section 21 through the drying air outlet, and the drying air flow exchanges heat with the condensate water when flowing through the condensate air duct section 21, and the humidity decreases; then the drying air flow enters the heating air duct section 22 through the impeller cavity 31, and under the action of the main heating device, the temperature of the drying air flow rises, and then the drying air flow enters the outer cylinder 11 and the inner cylinder again; the drying air flow exchanges heat with the clothes in the inner cylinder to evaporate the moisture of the clothes and achieve the purpose of drying the clothes; when fresh ambient air needs to be introduced, in addition to the drying air flow circulating in the drying air flow loop, the fresh ambient air enters the impeller cavity 31 through the secondary air duct 23, and under the action of the secondary heating device 24, the temperature of the fresh ambient air rises; the fresh ambient air and the condensate reflux air flow are mixed in the impeller cavity 31, and then the mixed air flow enters the heating air duct section 22, and under the action of the main heating device, the temperature of the mixed air flow rises, and then enters the outer cylinder 11 and the inner cylinder; the mixed air flow exchanges heat with the clothes in the inner cylinder to improve the drying efficiency and drying quality of the clothes.

[0071] In summary, according to the drying demand, dynamically adjusting the air control mechanism 4 can accurately control the introduction amount of fresh ambient air, avoid excessive fresh air from diluting the temperature of the drying air flow in the heating air duct section 22, and at the same time ensure the humidity dilution effect; dynamically adjusting the power of the secondary heating device 24 to pre-heat the fresh ambient air, reduce the temperature difference between the fresh ambient air and the condensate reflux air flow, reduce the temperature fluctuation and temperature gradient of the mixed air flow, make the overall temperature distribution of the mixed air flow more uniform, and reduce the additional energy consumption of the main heating device; improve the heating efficiency, reduce the heating time, shorten the drying time, and improve the quality of the air in the outer cylinder 11; avoid uneven heating of the clothes caused by local low-temperature areas, and improve the drying efficiency and drying quality; for example, in the high-humidity stage of the clothes, increase the fresh ambient air flow to quickly dilute the humid and hot drying air flow, and the secondary heating power is increased synchronously to avoid a sudden drop in the temperature of the humid and hot drying air flow; in the low-humidity stage of the clothes, reduce the fresh ambient air flow to reduce energy consumption, and the power of the secondary heating device 24 is correspondingly reduced.

[0072] In some other embodiments, a condenser is provided in the condensation air duct section 21. Condensate can flow through the condenser, which is used for heat exchange between the condensate and the drying air flow passing through the condensation air duct section 21.

[0073] The specific structure of the fan 3 will be further described below. The fan 3 is a double-suction centrifugal fan, and the fan 3 includes a volute and a wind blade 35; the volute encloses a wind blade cavity 31, and the axial direction of the wind blade cavity 31 is the vertical direction; a wind blade cavity ventilation opening 34 is formed at the upper end of the axial direction of the wind blade cavity 31, a wind blade cavity air inlet 32 is formed at the lower end of the axial direction of the wind blade cavity 31, and a wind blade cavity air outlet 33 is formed on the side wall of the wind blade cavity 31;

[0074] Specifically, the volute includes an upper volute and a lower volute which are arranged opposite to each other up and down, and the upper volute is above the lower volute; the upper volute includes an upper volute main body 361 and an upper volute air outlet section 362, and the lower volute includes a lower volute main body 371 and a lower volute air outlet section 372; the upper volute main body 361 and the lower volute main body 371 jointly enclose the wind blade cavity 31, the upper volute main body 361 forms a wind blade cavity ventilation opening 34 at the upper end of the axial direction of the wind blade cavity 31, and the lower volute main body 371 forms a wind blade cavity air inlet 32 at the lower end of the axial direction of the wind blade cavity 31; the side walls of the upper volute main body 361 and the lower volute main body 371 jointly enclose the wind blade cavity air outlet 33;

[0075] The upper volute air outlet section 362 and the lower volute air outlet section 372 jointly enclose a volute air outlet section. One end of the volute air outlet section is communicated with the wind blade cavity 31 through the wind blade cavity air outlet 33, and the other end of the volute air outlet section is communicated with the heating air duct section 22;

[0076] The wind blade 35 is drivingly connected to the wind blade driving motor; when there is no need to introduce ambient fresh air, the wind blade driving motor operates, the wind blade 35 rotates, and then the drying air flow in the outer cylinder 11 can enter the condensation air duct section 21 through the drying air outlet, and then enter the wind blade cavity 31 through the wind blade cavity air inlet 32, and then enter the heating air duct section 22 through the wind blade cavity air outlet 33; when there is a need to introduce ambient fresh air, in addition to the drying air flow circulating in the drying air flow loop, the ambient fresh air enters the wind blade cavity 31 through the auxiliary air duct 23 and the wind blade cavity ventilation opening 34, and then is mixed with the condensate return air flow; the mixed air flow enters the heating air duct section 22, and then enters the outer cylinder 11 through the drying air inlet.

[0077] The structure of the auxiliary air duct 23 will be further described below. The auxiliary air duct 23 includes a first auxiliary air duct section 231 and a second auxiliary air duct section 232 that are arranged in a stepped shape and connected. The first auxiliary air duct section 231 covers the ventilation opening 34 of the impeller cavity. The second auxiliary air duct section 232 is arranged behind the fan 3. The flow area of the first auxiliary air duct section 231 is larger than that of the second auxiliary air duct section 232; the occupied space of the auxiliary air duct 23 is reduced, so that the flow velocity of the ambient fresh air changes when passing through the auxiliary air duct 23, ensuring sufficient heating of the ambient fresh air by the auxiliary heating device 24 and making the temperature distribution of the ambient fresh air more uniform after heating; at the same time, the ambient fresh air can enter the impeller cavity 31 with a larger flow area and mix more evenly with the condensate return air flow;

[0078] Specifically, the auxiliary air duct 23 and the upper volute are detachably connected or integrally formed; preferably, the auxiliary air duct 23 and the upper volute are integrally formed.

[0079] Furthermore, the power of the main heating device is adjustable;

[0080] The main heating device, the auxiliary heating device 24 and the air control mechanism 4 are configured to: when the clothes treatment device runs a drying program, at least according to the temperature of the ambient fresh air, the flow rate of the condensate return air flow and the temperature of the condensate return air flow, cooperate to adjust the power of the main heating device, the power of the auxiliary heating device 24 and the air control mechanism 4;

[0081] Through the linkage adjustment of the power of the main heating device, the power of the auxiliary heating device 24 and the flow rate of the ambient fresh air, the ambient fresh air entering the impeller cavity 31 through the ventilation opening 34 of the impeller cavity and the drying air flow entering the impeller cavity 31 through the air inlet 32 of the impeller cavity are mixed according to a certain flow rate ratio and a certain temperature ratio. The overall temperature distribution of the mixed air flow is uniform and the temperature of the mixed air flow changes little relative to the temperature of the condensate return air flow. Then, through the heating of the main heating device, the temperature of the mixed air flow reaches the preset temperature; subsequently, the mixed air flow enters the outer cylinder 11 and the inner cylinder and exchanges heat with the clothes in the inner cylinder to improve the drying efficiency;

[0082] The ambient fresh air is preheated by the auxiliary heating device 24 to a temperature close to that of the condensate return air flow, reducing the supplementary energy consumption of the main heating device; by introducing ambient fresh air to match the condensate return air flow in both flow rate and temperature, the emission of ineffective thermal energy is reduced and the comprehensive energy efficiency ratio is improved; for example, in the high humidity stage of the clothes, the flow rate of the ambient fresh air is preferentially increased to quickly dilute the humidity in cooperation with the dual heating devices; in the low humidity stage of the clothes, the flow rate of the ambient fresh air is reduced, and the main heating power is finely adjusted to maintain temperature stability, avoiding energy consumption waste caused by excessive dehumidification.

[0083] The structure required for adjusting the flow area of the auxiliary air duct 23 will be further described below. The air control mechanism 4 includes an air control baffle 41; the air control baffle 41 is movably arranged in the auxiliary air duct 23 or at one end of the auxiliary air duct 23 communicating with the external environment;

[0084] The air control baffle 41 can be controlled to move to adjust the flow rate of the ambient fresh air entering the auxiliary air duct 23; preferably, the air control baffle 41 is arranged at one end of the auxiliary air duct 23 close to the ventilation opening of the box body.

[0085] Specifically, the air control baffle 41 is slidably arranged on the rear side wall of the box body 13, and the sliding direction of the air control baffle 41 is perpendicular to the extending direction of the auxiliary air duct 23; when the air control baffle 41 is controlled to slide, the flow area of the auxiliary air duct 23 can be increased or decreased; the air control mechanism 4 further includes a transmission assembly, and the transmission assembly includes a rack 42 and a gear 43. The rack 42 is detachably connected or integrally formed with the air control baffle 41, and the gear 43 meshes with the rack 42; the gear 43 is drivingly connected to the air control baffle driving motor. When the air control baffle driving motor operates, the gear 43 rotates, and the rack 42 can drive the air control baffle 41 to move to adjust the flow area of the auxiliary air duct 23; preferably, the rack 42 and the air control baffle 41 are integrally formed.

[0086] When the tooth profile sizes and the number of teeth of the gear 43 and the rack 42 are different, the sliding speed of the rack 42 is different, and thus the flow rate adjustment speed of the ambient fresh air is different; when the rack 42 is detachably connected to the air control baffle 41, the gear 43 and the rack 42 with corresponding tooth profile sizes and the number of teeth can be adapted according to actual needs, so that the tooth profile sizes and the number of teeth of the gear 43 and the rack 42 meet the requirements for adjusting the flow rate of the ambient fresh air, and the applicable range of the air control mechanism 4 is expanded.

[0087] The air control mechanism 4 further includes a protection baffle. The protection baffle and the air control baffle 41 are arranged opposite to each other front and back with a gap. The protection baffle is in the front and the air control baffle 41 is in the back; the protection baffle is formed with a plurality of ventilation holes, which on the one hand allows the ambient fresh air to pass through the protection baffle smoothly, and on the other hand can prevent small animals such as cockroaches from entering the impeller cavity 31 through the auxiliary air duct 23.

[0088] In addition, the rotation speed of the blower 3 can be adjusted, that is, the power of the impeller 35 driving motor can be adjusted.

[0089] The main heating device, the auxiliary heating device, the rotation speed of the blower 3 and the air control mechanism 4 are configured such that when the laundry treatment device runs a drying program, the power of the main heating device, the power of the auxiliary heating device 24, the rotation speed of the blower 3 and the air control mechanism 4 can be coordinately adjusted according to the temperature of the ambient fresh air, the flow rate of the condensate return air flow and the temperature of the condensate return air flow, so that the flow rate of the mixed air flow is within a preset flow rate range and the temperature of the mixed air flow is within a preset temperature range, the temperature distribution of the mixed air flow is uniform, and the additional energy consumption of the main heating device is low, thereby improving the drying efficiency and drying quality.

[0090] In some other embodiments, a movable air outlet baffle is provided at the drying air outlet. When the air outlet baffle is controlled to move, the flow rate of the drying air flow passing through the drying air outlet can be adjusted.

[0091] The main heating device, the auxiliary heating device 24, the rotation speed of the blower 3, the air control mechanism 4, and the air outlet baffle are configured such that when the laundry treatment device runs a drying program, according to the temperature of the ambient fresh air, the flow rate of the condensate return air flow, and the temperature of the condensate return air flow, the power of the main heating device, the power of the auxiliary heating device 24, the rotation speed of the blower 3, the air control baffle 41, and the air outlet baffle are coordinately adjusted, so that the ambient fresh air and the condensate return air flow are mixed according to a certain flow rate ratio and a certain temperature ratio, and after the ambient fresh air and the condensate return air flow are mixed, the temperature distribution is uniform, and the additional energy consumption of the main heating device is low, improving the drying efficiency and drying quality.

[0092] <Control method>

[0093] This embodiment also provides a control method for a laundry treatment device, where the laundry treatment device is the laundry treatment device described in any one of the above; when the laundry treatment device runs a drying program, the control method includes:

[0094] S1. According to the drying requirements of the laundry in different drying stages of the drying program, at least coordinately adjust the power of the auxiliary heating device 24 and the air control mechanism 4;

[0095] According to the drying requirements, by dynamically adjusting the air control mechanism 4, the flow rate of the ambient fresh air flowing through the auxiliary air duct 23 can be accurately controlled, avoiding excessive fresh air from diluting the temperature of the drying air flow in the heating air duct section 22, and at the same time ensuring the humidity dilution effect; by dynamically adjusting the power of the auxiliary heating device 24, the auxiliary heating device 24 effectively pre-heats the ambient fresh air, reduces the temperature difference between the ambient fresh air and the high-temperature drying air flow in the heating air duct section 22, reduces the temperature fluctuation of the mixed drying air flow, and maintains the thermodynamic quality required for drying; solving the problems in the prior art that the excessive introduction amount of the ambient fresh air causes the temperature imbalance of the drying air flow or the insufficient introduction amount of the ambient fresh air causes poor humidity dilution effect, and solving the problem in the prior art that the introduced ambient fresh air is not heated, resulting in a low ambient temperature after mixing and a poor drying effect.

[0096] Further, the current drying stage of the laundry treatment device includes a heating and warming stage, a constant temperature and dehumidification stage, and a cooling and cooling stage that are sequentially operated according to time; the laundry treatment device is provided with a fresh air mode and an exhaust mode; S1 includes:

[0097] S11. Determine the current drying stage of the laundry treatment device;

[0098] S12. When the current drying stage is the heating and warming stage, control the main heating device to operate, control the auxiliary air duct 23 to be closed, and control the auxiliary heating device 24 to stop operating;

[0099] Closing the auxiliary air duct 23 and focusing on the main heating operation can increase the initial heating rate and shorten the preheating cycle;

[0100] S13. When the current drying stage is the constant-temperature dehumidification stage, control the opening of the auxiliary air duct 23 and the operation of both the main heating device and the auxiliary heating device 24. According to the humidity of the clothes, the temperature of the ambient fresh air, and the temperature of the condensate return air flow, coordinately adjust the rotation speed of the fan, the air control mechanism 4, and the power of the auxiliary heating device 24, or coordinately adjust the rotation speed of the fan, the air control mechanism 4, and the power of the main heating device and the power of the auxiliary heating device 24, so that the flow rate of the mixed air flow is within the preset flow rate range and the temperature of the mixed air flow after being heated by the main heating device is within the preset temperature range;

[0101] By coordinately adjusting the rotation speed of the fan, the flow rate of the ambient fresh air flowing through the auxiliary air duct, the power of the main heating device, and the power of the auxiliary heating device 24, while the humidity of the drying air flow drops rapidly, the temperature is maintained stable, avoiding temperature overshoot or insufficiency caused by single heating in the traditional solution; reducing the odor of the clothes and improving the drying efficiency;

[0102] S14. When the current drying stage is the cooling and temperature reduction stage, control the main heating device and the auxiliary heating device 24 to stop operating and the auxiliary air duct 23 to open, adjust the rotation speed of the fan 3, and control the clothes treatment device to alternately switch between the fresh air mode and the exhaust mode;

[0103] By switching between the fresh air / exhaust mode (such as alternating every 5 minutes), the heat remaining in the outer cylinder 11 is discharged more quickly, the cooling efficiency is improved, and the problem of moisture return caused by the secondary evaporation of condensate water is avoided, reducing the wrinkles of the clothes; during the cooling stage, the fan 3 operates at a reduced speed (such as the rotation speed drops to 60% of the rated speed), reducing mechanical wear;

[0104] Among them, the maximum rotation speed of the fan 3 during the cooling and temperature reduction stage is lower than the minimum rotation speed of the fan 3 during the constant-temperature dehumidification stage; when the clothes treatment device is in the fresh air mode, the ambient fresh air enters the air blade cavity 31 through the auxiliary air duct 23 and then enters the heating air duct; when the clothes treatment device is in the exhaust mode, the air in the outer cylinder 11 flows through the condensate air duct section 21, the air blade cavity 31, and the auxiliary air duct 23 in sequence and is discharged to the external environment; a part of the ambient air is introduced into the outer cylinder 11, and a part of the humid air in the outer cylinder 11 is discharged, solving the problem of low dehumidification efficiency in the prior art;

[0105] Specifically, a gas sensor (such as a MOS-type odor sensor) is provided in the outer cylinder 11 or the main air duct to detect the odor degree of the drying air flow; when the odor degree exceeds the threshold, it automatically switches to the exhaust mode to discharge part of the odorous drying air flow, and then switches back to the fresh air mode to introduce ambient fresh air, improving the quality of the drying air flow; at the same time, the flow rate of the ambient fresh air is adjusted in combination with the moisture content of the clothes. For example, when the moisture content is high, the flow rate of the ambient fresh air is increased to accelerate the discharge of moisture;

[0106] In summary, in this embodiment, through a phased strategy, the humidity control is decoupled from the temperature management, shortening the drying cycle; through the fresh air / ventilation air alternating mode, the humid and hot air is forcibly discharged, reducing the rewetting rate, shortening the cooling time, and avoiding the formation of water vapor condensation on the inner surface of the cabinet 13 that may be caused by the discharge of moisture in the outer cylinder 11, thereby avoiding potential safety problems during the operation of the whole machine; through dynamic speed reduction + mode switching, the cooling energy consumption is reduced, and the service life of the fan 3 is significantly extended.

[0107] Embodiment 2

[0108] Based on Embodiment 1, in this embodiment, it is proposed that a through-hole of the air duct section is formed at one end of the condensation air duct section 21 close to the drying air outlet.

[0109] The drying assembly further includes a ventilation pipe, which includes a ventilation pipe air inlet end 52, a ventilation pipe air outlet end 53, and a ventilation pipe main body 51 connecting the ventilation pipe air inlet end 52 and the ventilation pipe air outlet end 53; the ventilation pipe main body 51 is arranged in the condensation air duct section 21, the ventilation pipe air inlet end 52 extends outward from the through-hole of the air duct section to the outside of the condensation air duct section 21 and communicates with the external environment, and the ventilation pipe air outlet end 53 extends into the inside of the air blade cavity 31 through the air blade cavity air inlet 32 and communicates with the air blade cavity 31; when the air blade 35 is controlled to rotate, a negative pressure is formed at the ventilation pipe air outlet end 53, and under the action of the pressure difference, the ambient fresh air enters the air blade cavity 31 through the ventilation pipe.

[0110] The ambient fresh air entering the ventilation pipe through the ventilation pipe air inlet end 52 can exchange heat with the drying air flow flowing through the condensation air duct, and enters the air blade cavity 31 through the ventilation pipe air outlet end 53; on the one hand, the drying air flow flowing through the condensation air duct can preheat the ambient fresh air flowing through the ventilation pipe, reducing the influence of the ambient fresh air on the temperature of the condensation reflux air flow; on the other hand, the ambient fresh air flowing through the ventilation pipe can condense and dehumidify the drying air flow flowing through the condensation air duct, reducing the water consumption of the condensed water, which is environmentally friendly; at the same time, the ventilation pipe can increase the heat exchange area and heat exchange duration of the drying air flow of the condensed water, improving the condensation dehumidification efficiency.

[0111] Specifically, the ventilation pipe main body 51 is in a serpentine structure or a spiral structure, which can increase the heat exchange area between the ambient fresh air and the drying air flow and the heat exchange area between the condensed water and the drying air flow.

[0112] Furthermore, a valve is connected in series to the ventilation pipe, and the flow rate of the ambient fresh air flowing through the ventilation pipe can be adjusted through the valve.

[0113] The main heating device, the auxiliary heating device, the air control mechanism 4 and the valve are configured to: when the clothes processing device runs a drying program, coordinate and adjust the power of the main heating device, the power of the auxiliary heating device 24, the air control mechanism 4 and the valve at least according to the temperature of the ambient fresh air, the flow rate of the condensate return air flow and the temperature of the condensate return air flow; through the linkage adjustment of the power of the main heating device, the power of the auxiliary heating device 24, the flow rate of the ambient fresh air in the auxiliary air duct and the flow rate of the ambient fresh air in the ventilation pipe, the ambient fresh air entering the air blade cavity 31 through the air blade cavity ventilation opening 34, the drying air flow entering the air blade cavity 31 through the air blade cavity air inlet 32 and the ambient fresh air entering the air blade cavity 31 through the ventilation pipe are mixed according to a certain flow rate ratio and a certain temperature ratio, and the overall temperature distribution of the mixed drying air flow is uniform and the temperature change is not significant relative to the temperature of the drying air flow entering the air blade cavity 31 through the air blade cavity air inlet 32. Then, through the heating of the main heating device, the temperature of the mixed drying air flow reaches the preset temperature; subsequently, the mixed drying air flow enters the outer cylinder 11 and the inner cylinder, and exchanges heat with the clothes in the inner cylinder to improve the drying efficiency.

[0114] Embodiment 3

[0115] Based on Embodiment 1, this embodiment proposes that a condensate water outlet is formed at one end of the condensate air duct section 21 close to the drying air outlet, and the condensate water outlet is used to output the condensate water in the condensate air duct section 21;

[0116] A heat exchange module is provided in the auxiliary air duct 23. The heat exchange module forms a first heat exchange channel and a second heat exchange channel, and the first heat exchange channel and the second heat exchange channel are arranged in an alternating manner; the first heat exchange channel includes a first heat exchange channel air inlet end and a first heat exchange channel air outlet end both communicating with the auxiliary air duct 23. The ambient fresh air in the auxiliary air duct 23 can enter the first heat exchange channel through the first heat exchange channel air inlet end and then enter the auxiliary air duct 23 through the first heat exchange channel air outlet end;

[0117] Specifically, the extending direction of the first heat exchange channel is the same as the extending direction of the auxiliary air duct 23, and the extending direction of the second heat exchange channel is perpendicular to the extending direction of the first heat exchange channel; there are multiple first heat exchange channels and multiple second heat exchange channels. The multiple first heat exchange channels are arranged at intervals, and the multiple second heat exchange channels are arranged at intervals; when the structure of the heat exchange module is different, the flow area and the number of the first heat exchange channels are different, and the flow area and the number of the second heat exchange channels are different; according to actual needs, a heat exchange module with a corresponding flow area and number can be set to improve the heat exchange efficiency between the ambient fresh air and the condensate water; the heat exchange module is detachably arranged in the auxiliary air duct 23, and a heat exchange module with a corresponding structure can be set according to actual needs; when the structure of the heat exchange module is different, the number and the flow area of the first heat exchange channel and the second heat exchange channel are different, and different heat exchange efficiencies can be achieved;

[0118] The drying assembly further includes a pump, a first condensate water pipe, and a second condensate water pipe disposed outside the condensate air duct section 21; a condensate water outlet, the pump, the first condensate water pipe, the second heat exchange duct, the second condensate water pipe, a condensate water inlet, and the condensate air duct section 21 are sequentially connected to form a condensate water loop; when the pump operates, the condensate water can circulate in the condensate water loop;

[0119] The condensate water flowing through the condensate air duct section 21 exchanges heat with the drying air flow, causing the temperature of the condensate water to rise; the condensate water flowing through the second heat exchange duct exchanges heat with the ambient fresh air flowing through the first heat exchange duct to preheat the ambient fresh air.

[0120] Furthermore, the power of the pump is adjustable;

[0121] The pump, the auxiliary heating device 24, and the air control mechanism 4 are configured to: when the laundry treatment device runs a drying program, according to the temperature of the condensate water flowing through the pump, the temperature of the ambient fresh air, the flow rate of the condensate return air flow, and the temperature of the condensate return air flow, cooperate to adjust the power of the auxiliary heating device 24, the power of the pump, and the air control mechanism 4; through the linkage adjustment of the power of the auxiliary heating device 24, the power of the pump, and the flow rate of the ambient fresh air flowing through the auxiliary air duct 23, make full use of the waste heat of the condensate water to preheat the ambient fresh air in the auxiliary air duct 23, and at the same time combine the heating of the ambient fresh air by the auxiliary heating device 24, so that the ambient fresh air and the condensate return air flow are mixed according to a certain flow rate ratio and a certain temperature ratio, and the overall temperature distribution of the mixed air flow is uniform and the temperature change relative to the temperature of the condensate return air flow is small; improve the drying efficiency and drying quality; or,

[0122] The main heating device, the pump, the auxiliary heating device 24, and the air control mechanism 4 are configured to: when the laundry treatment device runs a drying program, according to the temperature of the condensate water flowing through the pump, the temperature of the ambient fresh air, the flow rate of the condensate return air flow, and the temperature of the condensate return air flow, cooperate to adjust the power of the main heating device, the power of the auxiliary heating device 24, the power of the pump, and the air control mechanism 4; through the linkage adjustment of the power of the main heating device, the power of the auxiliary heating device 24, the power of the pump, and the flow rate of the ambient fresh air flowing through the auxiliary air duct 23, make full use of the waste heat of the condensate water to preheat the ambient fresh air in the auxiliary air duct 23, and at the same time combine the heating of the ambient fresh air by the auxiliary heating device 24, so that the ambient fresh air and the condensate return air flow are mixed according to a certain flow rate ratio and a certain temperature ratio, and the overall temperature distribution of the mixed air flow is uniform and the temperature change relative to the temperature of the condensate return air flow is small, and then through the heating of the main heating device, make the temperature of the mixed drying air flow reach the preset temperature; improve the drying efficiency and drying quality.

[0123] Embodiment 4

[0124] Based on Embodiment 1, the double-suction centrifugal fan 3 includes a first blade and a second blade that are oppositely arranged along the axial direction. The structures of the first blade and the second blade are different, achieving air flow classification, solving the problem of air flow mixing interference caused by the single-structure blades of the traditional double-suction fan 3, and improving the fresh air inhalation efficiency.

[0125] In addition, a flow disturbance structure is provided in the blower cavity 31 and near the air outlet 33 of the blower cavity to disrupt the flow states of the ambient fresh air and the drying air flow in the blower cavity 31, enabling them to mix better and avoiding the phenomenon of cold and heat stratification; making the temperature of the mixed drying air flow more uniform, thereby improving the quality of the drying air flow entering the heating air duct, enabling more efficient heating in the heating air duct, and ultimately enhancing the drying effect on the clothes in the inner cylinder.

[0126] The exemplary embodiments of the present disclosure have been specifically illustrated and described above. It should be understood that the present disclosure is not limited to the detailed structures, setting manners, or implementation methods described herein; on the contrary, the present disclosure is intended to cover various modifications and equivalent settings included within the spirit and scope of the appended claims.

Claims

1. A clothes processing device, characterized in that: The clothes processing device comprises an outer drum (11) and a drying assembly; a drying air inlet is provided at the drum mouth of the outer drum (11), and a drying air outlet is formed on the drum wall of the outer drum (11); the drying assembly comprises a main air duct, a fan (3) and a secondary air duct (23); the main air duct comprises a condensing air duct section (21) and a heating air duct section (22); the fan (3) is formed with a blade cavity (31), a blade cavity air inlet (32) connected to the blade cavity (31), a blade cavity air outlet (33) and a blade cavity vent (34); The condensing air duct section (21) is connected to the drying air outlet and the air inlet (32) of the fan chamber, and the heating air duct section (22) is connected to the air outlet (33) of the fan chamber and the drying air inlet; the auxiliary air duct (23) is connected to the air vent (34) of the fan chamber and the external environment, and the auxiliary air duct (23) is at least used to introduce environmental fresh air into the fan chamber (31); an auxiliary heating device (24) is provided in the auxiliary air duct (23), and the auxiliary heating device (24) is used to heat the environmental fresh air flowing through the auxiliary air duct (23), and the power of the auxiliary heating device (24) is adjustable; an air control mechanism (4) is provided in the auxiliary air duct (23) or at one end of the auxiliary air duct (23) close to the external environment, and the air control mechanism (4) is at least used to adjust the flow rate of the environmental fresh air flowing through the auxiliary air duct (23); The auxiliary heating device (24) and the wind control mechanism (4) are configured to: when the clothes processing device runs a drying program, according to the drying requirements of the clothes in different drying stages, at least coordinately adjust the power of the auxiliary heating device (24) and the wind control mechanism (4); The external environment is the environment in which the clothing processing device is located, and the fresh air is the air in the external environment.

2. The clothes processing device according to claim 1, characterized in that: The fan (3) is a double-suction fan, and the fan (3) comprises a volute and a fan blade (35); the volute is arranged to form the fan blade cavity (31), and the axial direction of the fan blade cavity (31) is in a vertical direction; the axial upper end of the fan blade cavity (31) is formed with the fan blade cavity vent (34), the axial lower end of the fan blade cavity (31) is formed with the fan blade cavity air inlet (32), and the side wall of the fan blade cavity (31) is formed with the fan blade cavity air outlet (33); the fan blade (35) is rotatably arranged in the fan blade cavity (31).

3. The clothes processing device according to claim 2, characterized in that: The auxiliary air duct (23) comprises a first auxiliary air duct section (231) and a second auxiliary air duct section (232) which are arranged in sequence, wherein the first auxiliary air duct section (231) is covered at the air vent (34) of the fan chamber, and the second auxiliary air duct section (232) is arranged at the rear of the fan (3), and the air vent (34) of the fan chamber, the first auxiliary air duct section (231) and the second auxiliary air duct section (232) are connected in sequence; and the flow area of ​​the first auxiliary air duct section (231) is greater than the flow area of ​​the second auxiliary air duct section (232).

4. The laundry processing device according to any one of claims 1 to 3, characterized in that: An air duct section through hole is formed at one end of the condensing air duct section (21) close to the drying air outlet; The drying component further comprises a ventilation duct, wherein the ventilation duct comprises an air inlet end (52), an air outlet end (53) and a ventilation duct body (51); the ventilation duct body (51) connects the air inlet end (52) and the air outlet end (53) of the ventilation duct, and the ventilation duct body (51) is arranged in the condensing air duct section (21); the air inlet end (52) of the ventilation duct extends to the outside of the condensing air duct section (21) through the through hole of the air duct section and communicates with the external environment, and the air outlet end (53) of the ventilation duct extends to the inside of the air blade cavity (31) through the air inlet (32) of the air blade cavity and communicates with the air blade cavity (31); The ambient fresh air entering the ventilation duct through the ventilation duct air inlet end (52) can exchange heat with the air flowing through the condensation air duct section (21) and enter the fan chamber (31) through the ventilation duct air outlet end (53).

5. The laundry processing device according to any one of claims 1 to 3, characterized in that: A main heating device is provided in the heating air duct section (22), and the main heating device is used to heat the drying air flow flowing through the heating air duct section (22), and the power of the main heating device is adjustable; The main heating device, the auxiliary heating device (24) and the wind control mechanism (4) are configured to: when the clothes processing device runs a drying program, at least according to the temperature of the ambient fresh air, the flow rate of the condensation return airflow and the temperature of the condensation return airflow, coordinately adjust the power of the main heating device, the power of the auxiliary heating device (24) and the wind control mechanism (4); The condensation return airflow is a drying airflow that enters the fan cavity (31) from the condensation air duct section (21).

6. The clothes processing device according to claim 5, characterized in that: A condensation water inlet is formed at one end of the condensation air duct section (21) close to the air inlet (32) of the fan blade chamber, and the condensation water inlet is used to transport condensed water to the condensation air duct section (21); a condensation water outlet is formed at one end of the condensation air duct section (21) close to the drying air outlet, and the condensation water outlet is used to output the condensed water in the condensation air duct section (21); A heat exchange module is provided in the auxiliary air duct (23), and the heat exchange module is formed with a first heat exchange channel and a second heat exchange channel, and the first heat exchange channel and the second heat exchange channel are arranged alternately; the first heat exchange channel includes a first heat exchange channel air inlet end and a first heat exchange channel air outlet end both of which are connected to the auxiliary air duct (23), and the ambient fresh air of the auxiliary air duct (23) can enter the first heat exchange channel through the first heat exchange channel air inlet end, and then enter the auxiliary air duct (23) through the first heat exchange channel air outlet end; The drying component further comprises a pump arranged outside the condensing air duct section (21); the condensing water outlet, the pump, the second heat exchange channel, the condensing water inlet and the condensing air duct section (21) are sequentially connected to form a condensing water loop; when the pump is running, condensing water can circulate in the condensing water loop; The condensed water flowing through the condensing air duct section (21) exchanges heat with the drying air flow, and the condensed water flowing through the second heat exchange channel exchanges heat with the ambient fresh air flowing through the first heat exchange channel.

7. The clothes processing device according to claim 6, characterized in that: The power of the pump is adjustable; The pump, the auxiliary heating device (24) and the air control mechanism (4) are configured to: when the clothes processing device runs a drying program, according to the temperature of the condensed water flowing through the pump, the temperature of the ambient fresh air, the flow rate of the condensation return airflow and the temperature of the condensation return airflow, coordinately adjust the power of the pump, the power of the auxiliary heating device (24) and the air control mechanism (4); or, The main heating device, the pump, the auxiliary heating device (24) and the wind control mechanism (4) are configured to: when the clothing processing device runs a drying program, according to the temperature of the condensed water flowing through the pump, the temperature of the ambient fresh air, the flow rate of the condensation return airflow and the temperature of the condensation return airflow, the power of the main heating device, the power of the pump, the power of the auxiliary heating device (24) and the wind control mechanism (4) are coordinated and adjusted.

8. A method for controlling a clothes processing device, characterized in that: The clothes processing device is the clothes processing device according to any one of claims 1 to 7; when the clothes processing device runs a drying program, the control method comprises: According to the drying requirements of the clothes in different drying stages of the drying program, at least the power of the auxiliary heating device (24) and the wind control mechanism (4) are coordinated and adjusted.

9. The control method of the clothes processing device according to claim 8, characterized in that: The method of at least coordinating the power of the auxiliary heating device (24) and the wind control mechanism (4) according to the drying requirements of the clothes at different drying stages of the drying program comprises: determining a current drying stage of the laundry treatment device; When the current drying stage is a constant temperature dehumidification stage, the auxiliary air duct (23) is controlled to open, the main heating device in the heating air duct section (22) and the auxiliary heating device (24) are operated, and the rotation speed of the fan (3), the air control mechanism (4) and the power of the auxiliary heating device (24) are coordinated and adjusted according to the humidity of the clothes, the temperature of the ambient fresh air and the temperature of the condensation return airflow, so that the flow rate of the mixed airflow is within a preset flow rate range and the temperature of the mixed airflow is within a preset temperature range; The condensation return airflow is a drying airflow entering the fan cavity (31) from the condensation air duct section (21), and the mixed airflow is a mixture of the ambient fresh air and the condensation return airflow entering the fan cavity (31).

10. The control method of the clothes processing device according to claim 8, characterized in that: The heating air duct section (22) is provided with a main heating device, the main heating device is used to heat the drying airflow flowing through the heating air duct section (22), and the power of the main heating device is adjustable; according to the drying requirements of the clothes in different drying stages of the drying program, at least the power of the auxiliary heating device (24) and the wind control mechanism (4) are coordinated and adjusted, including: determining a current drying stage of the laundry treatment device; When the current drying stage is a constant temperature dehumidification stage, the auxiliary air duct (23) is controlled to be opened and the main heating device and the auxiliary heating device (24) are both operated, and the rotation speed of the fan (3), the air control mechanism (4) and the power of the main heating device and the power of the auxiliary heating device (24) are coordinated and adjusted according to the humidity of the clothes, the temperature of the ambient fresh air and the temperature of the condensation return airflow, so that the flow rate of the mixed airflow is within a preset flow rate range and the temperature of the mixed airflow after being heated by the main heating device is within a preset temperature range; The condensation return airflow is a drying airflow entering the fan cavity (31) from the condensation air duct section (21), and the mixed airflow is a mixture of the ambient fresh air and the condensation return airflow entering the fan cavity (31).

11. The control method of a clothes processing device according to any one of claims 9 to 10, characterized in that: The clothes processing device is provided with a fresh air mode and an exhaust air mode; and the power of the auxiliary heating device (24) and the wind control mechanism (4) are at least coordinated and adjusted according to the drying requirements of the clothes at different drying stages of the drying program, and further comprises: When the current drying stage is a heating stage, the main heating device is controlled to operate, the auxiliary air duct (23) is controlled to close, and the auxiliary heating device (24) is controlled to stop operating; When the current drying stage is a cooling stage, the main heating device and the auxiliary heating device (24) are controlled to stop running and the auxiliary air duct (23) is opened, the rotation speed of the fan (3) is adjusted, and the clothing processing device is controlled to alternately switch between the fresh air mode and the exhaust air mode; The maximum rotation speed of the fan (3) in the cooling stage is lower than the minimum rotation speed of the fan (3) in the constant temperature dehumidification stage; when the clothing processing device is in the fresh air mode, the ambient fresh air enters the fan cavity (31) through the auxiliary air duct (23) and then enters the heating air duct; when the clothing processing device is in the exhaust mode, the drying air flow in the outer drum (11) flows through the condensing air duct section (21), the fan cavity (31) and the auxiliary air duct (23) in sequence and is discharged to the external environment.

Images