CN110925957A

CN110925957A - Air conditioner and cleaning control method

Info

Publication number: CN110925957A
Application number: CN201811100307.3A
Authority: CN
Inventors: 唐林强; 马壮; 王晶晶
Original assignee: Qingdao Haier Smart Technology R&D Co Ltd
Current assignee: Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2018-09-20
Filing date: 2018-09-20
Publication date: 2020-03-27
Anticipated expiration: 2038-09-20
Also published as: CN110925957B

Abstract

The invention discloses an air conditioner and a cleaning control method, and belongs to the technical field of air conditioners. The air conditioner has self-cleaning heat exchanger and fan, and the self-cleaning heat exchanger still includes: the limiting component limits two or more adjacent heat exchange tubes and the airflow channel between the two or more adjacent heat exchange tubes into a cleaning space; one or more cleaning pieces are limited in the cleaning space, and the cleaning pieces can be driven by the airflow to move in the limited space; the cleaning control method comprises the following steps: controlling the air conditioner to be switched to the self-cleaning mode to operate in response to the air conditioner meeting the trigger condition of the self-cleaning mode; the self-cleaning mode comprises a frost condensation process and a defrosting process which are sequentially carried out; and after the defrosting process is finished, controlling a fan of the air conditioner to operate according to set parameters. Under the condition that the self-cleaning triggering condition is met through the parameter information, the aim of self-cleaning the self-cleaning heat exchanger by using the cleaning piece can be achieved only by controlling the operation mode of the fan and enabling the air flow generated by the operation of the fan to drive the cleaning piece to operate.

Description

Air conditioner and cleaning control method

Technical Field

The invention relates to the technical field of air conditioners, in particular to an air conditioner and a cleaning control method.

Background

When the indoor unit of the air conditioner operates in a cooling or heating mode, air in the indoor environment enters the indoor unit along the air inlet of the indoor unit and is blown into the indoor environment again through the air outlet after heat exchange of the heat exchange plates, in the process, impurities such as dust, large particles and the like mixed in the indoor air can also enter the indoor machine along with the air flow of the inlet air, although the dustproof filter screen arranged at the air inlet of the indoor unit can filter most of dust and particles, but a small amount of fine dust is not completely blocked and filtered, and with the long-term use of the air conditioner, the dust will gradually deposit and adhere to the surfaces of the heat exchanger fins, and since the dust covering the outer surfaces of the heat exchanger is less thermally conductive, it directly affects the heat exchange between the heat exchange fins and the indoor air, so that the indoor unit needs to be cleaned regularly to ensure the heat exchange efficiency of the indoor unit.

Generally, a cleaning method of an indoor unit of an air conditioner in the prior art mainly comprises two modes of manual cleaning and self-cleaning of the air conditioner, wherein the manual cleaning mode is mainly completed by manually disassembling a filter screen of the indoor unit and manually dedusting a heat exchanger by a user or a maintenance worker, and the process is complex, time-consuming and labor-consuming; the air conditioner is self-cleaned mainly by using the frost condensation-defrosting operation of the air conditioner to clearly strip off dust on the heat exchanger by using condensed frost, but the frost condensation-defrosting operation involves switching of the operation mode of the air conditioner, so that the normal use of the air conditioner by a user is often influenced in the self-cleaning process. Therefore, there is still a need for a simple and convenient way to clean the heat exchanger.

Disclosure of Invention

The invention provides an air conditioner and a cleaning control method, and aims to solve the problem of cleaning and dedusting of a self-cleaning heat exchanger of the air conditioner. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.

According to a first aspect of the present invention, there is provided a cleaning control method for an air conditioner having a self-cleaning heat exchanger and a fan, the self-cleaning heat exchanger including a plurality of heat exchange tubes arranged at intervals, an air flow passage being formed between adjacent heat exchange tubes, the self-cleaning heat exchanger further including: at least one group of limiting members, wherein each group of limiting members limits two or more adjacent heat exchange tubes and the airflow channel between the adjacent heat exchange tubes into a cleaning space, and the limiting members can be used for the airflow flowing through the cleaning space to pass through; one or more cleaning pieces are limited in the cleaning space, and the cleaning pieces can be driven by the airflow to move in the limited space; the cleaning control method comprises the following steps:

controlling the air conditioner to be switched to the self-cleaning mode to operate in response to the air conditioner meeting the trigger condition of the self-cleaning mode; the self-cleaning mode comprises a frost condensation process and a defrosting process which are sequentially carried out;

and after the defrosting process is finished, controlling a fan of the air conditioner to operate according to set parameters.

In an alternative embodiment, the cleaning control method further comprises:

determining respective defrosting time lengths of the self-cleaning heat exchanger and the cleaning piece;

and determining the defrosting time with a larger value in the self-cleaning heat exchanger and the cleaning piece as the running time of the defrosting process.

In an alternative embodiment, controlling a fan of an air conditioner to operate at set parameters includes:

controlling a fan of the air conditioner to operate at a first set parameter, wherein the first set parameter comprises: the rotating speed of the fan is a first rotating speed, the rotating direction is a first rotating direction, and the duration is a first duration.

In an alternative embodiment, the method for controlling the fan of the air conditioner to operate according to the set parameters further comprises the following steps:

after controlling the fan of the air conditioner to operate at the first set parameter, controlling the fan of the air conditioner to switch to operate at a second set parameter, wherein the second set parameter comprises: the rotating speed of the fan is a second rotating speed which is greater than the first rotating speed, the turning direction is a first turning direction, and the duration is a second duration.

after controlling the fan of the air conditioner to operate at the first set parameter, controlling the fan of the air conditioner to switch to operate at a third set parameter, wherein the third set parameter comprises: the rotating speed of the fan is a third rotating speed, the rotating direction is a second rotating direction opposite to the first rotating direction, and the time duration is a third time duration.

According to a second aspect of the present invention, there is also provided an air conditioner having a self-cleaning heat exchanger and a fan, the self-cleaning heat exchanger including a plurality of heat exchange tubes arranged at intervals, an air flow passage being formed between adjacent heat exchange tubes, the self-cleaning heat exchanger further including: at least one group of limiting members, wherein each group of limiting members limits two or more adjacent heat exchange tubes and the airflow channel between the adjacent heat exchange tubes into a cleaning space, and the limiting members can be used for the airflow flowing through the cleaning space to pass through; one or more cleaning pieces are limited in the cleaning space, and the cleaning pieces can be driven by the airflow to move in the limited space; the air conditioner further includes a controller for:

In an alternative embodiment, the controller is further configured to:

In an alternative embodiment, the controller is specifically configured to:

In an alternative embodiment, the controller is further specifically configured to:

The invention adopts the technical scheme and has the beneficial effects that:

the self-cleaning heat exchanger provided by the invention limits the heat exchange tubes and the airflow channels between the heat exchange tubes into a cleaning space for the cleaning pieces to freely run, when airflow flows through the cleaning space, the cleaning pieces can be driven by the wind power of the airflow to irregularly move in the cleaning space, and when the cleaning pieces are in running contact with the outer surface of the self-cleaning heat exchanger, the cleaning pieces can rub the outer surface of the self-cleaning heat exchanger, so that dirt adhered to the outer surface can be rubbed clearly, and the self-cleaning heat exchanger can play a role similar to a 'rag'; therefore, under the condition that the self-cleaning triggering condition is met through the parameter information, the self-cleaning heat exchanger can be self-cleaned by the cleaning piece only by controlling the operation mode of the fan and driving the cleaning piece to operate by the airflow generated by the operation of the fan.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.

Drawings

Fig. 1 is a schematic front view (front is the extending direction towards the airflow channel) of the self-cleaning heat exchanger according to an exemplary embodiment;

FIG. 2 is a side view of the self-cleaning heat exchanger of the present invention according to an exemplary embodiment;

FIG. 3 is a schematic diagram of a second front side structure of the self-cleaning heat exchanger according to an exemplary embodiment (the front side is the extending direction toward the airflow channel);

FIG. 4 is a schematic side view of a second self-cleaning heat exchanger according to the present invention in accordance with an exemplary embodiment;

FIG. 5 is a schematic side view of an air conditioner according to the present invention according to an exemplary embodiment;

FIG. 6 is a schematic structural diagram of one embodiment of a magnetic refrigeration heat exchange apparatus according to the present invention;

FIG. 7 is a top view block diagram of one embodiment of a magnetic refrigeration heat exchange apparatus according to the present invention;

FIG. 8 is an internal block diagram of one embodiment of a magnetic media bed of a magnetic refrigeration heat exchange apparatus according to the present invention;

FIG. 9 is a schematic structural diagram of another embodiment of a magnetic refrigeration heat exchange apparatus according to the present invention;

FIG. 10 is a schematic side view of a third self-cleaning heat exchanger of the present invention according to one exemplary embodiment;

fig. 11 is a flowchart illustrating a control method of an air conditioner according to the present invention, according to an exemplary embodiment;

wherein, 1, self-cleaning heat exchanger; 11. a heat exchange pipe; 12. an air flow channel; 13. cleaning a space; 2. a cleaning member; 3. an air conditioner; 31. a housing; 32. an air duct; 33. a fan; 34. an air outlet; 4. and (4) protruding.

Detailed Description

The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.

Fig. 1 is a schematic front view (front is the extending direction towards the airflow channel 12) of the self-cleaning heat exchanger 1 according to an exemplary embodiment; fig. 2 is a schematic side view of the self-cleaning heat exchanger 1 according to an exemplary embodiment of the present invention; fig. 3 is a schematic diagram of a front structure of the self-cleaning heat exchanger 1 according to an exemplary embodiment (the front is an extending direction toward the airflow channel 12); fig. 4 is a schematic side view of the self-cleaning heat exchanger 1 according to an exemplary embodiment of the present invention.

As shown in fig. 1 to 4, the present invention provides a self-cleaning heat exchanger 1, the self-cleaning heat exchanger 1 comprises a plurality of heat exchange tubes 11 arranged at intervals, in an embodiment, the plurality of heat exchange tubes 11 are arranged in parallel at the same interval, here, adjacent heat exchange tubes 11 are communicated with each other through U-shaped tubes or bent tubes at the end portions, each heat exchange tube 11 can be regarded as a straight tube section except the U-shaped tubes or bent tubes at the end portions, in this embodiment, a space between the straight tube sections of two adjacent heat exchange tubes 11 is mainly defined as an air flow channel 12, and air flow can freely flow along the air flow channel 12.

It should be understood that the self-cleaning heat exchanger 1 to which the present invention is applied is not limited to the tube type self-cleaning heat exchanger 1 mentioned above, but other types of self-cleaning heat exchangers 1, such as a plate type, may also be used with similar solutions.

The self-cleaning heat exchanger 1 further comprises at least one set of stop members and cleaning elements 2. Wherein each set of the limiting members limits two or more adjacent heat exchange tubes 11 and the air flow channel 12 therebetween into a cleaning space 13, and the limiting members can be used for the air flow passing through the cleaning space 13 to pass through; one or more cleaning elements 2 are confined in a cleaning space 13, in which the cleaning elements 2 can be moved by an air flow.

Therefore, when the air current flows through the cleaning space 13, the cleaning piece 2 can be driven by the wind power of the air current to move irregularly in the cleaning space 13, when the cleaning piece 2 is in running contact with the outer surface of the self-cleaning heat exchanger 1, the cleaning piece 2 can rub the outer surface of the self-cleaning heat exchanger 1, so that dirt adhered to the outer surface can be rubbed clearly, and the effect similar to 'rag' can be achieved, therefore, when the air conditioner 3 runs in normal air supply, the self-cleaning operation of the self-cleaning heat exchanger 1 can be achieved by the cleaning piece 2.

In an alternative embodiment, taking two adjacent heat exchange tubes 11 as an example, the limiting member includes filter screens disposed at two ends of the extending direction of the airflow channel 12 and fixed to the heat exchange tubes 11 at two sides of the airflow channel 12 at each end, and the filter screens at two ends and the heat exchange tubes 11 at two sides enclose a cleaning space 13.

Here, the filter screen is not limited to be arranged around the heat exchange tubes 11 on both sides of the air flow channel 12, and if there are other gaps between the heat exchange tubes 11 on both sides that may cause the cleaning elements 2 to be detached, the filter screen may be additionally arranged for shielding, so as to ensure that the movement range of the cleaning elements 2 is always in the cleaning space 13.

It is optional, the middle part that corresponds airflow channel of filter screen is formed with the orientation airflow channel's arch, here, the arch can with form the accommodation space that cleaner 2 subsides naturally when the filter screen position between the heat exchange tube of current airflow channel's both sides, here, because the arch is protruding towards airflow channel, consequently, cleaner 2 can move to the linking position between the heat exchange tube of filter screen and both sides naturally under the action of gravity, thereby make cleaner 2 can be more close to the heat exchange tube, like this, cleaner 2 carries out the random motion under the effect of air current when, the home range of most cleaner 2 is closer to the heat exchange tube more, so that cleaner 2 can have more when the motion and carry out abluent chance with the heat exchanger contact friction, the cleaning efficiency to the heat exchange tube has been improved.

Fig. 10 is a schematic side view of a self-cleaning heat exchanger according to an exemplary embodiment of the present invention.

In the self-cleaning heat exchanger shown in fig. 10, a part of the filter screen is arranged at the bottom of the heat exchanger and is in the shape of an arc-shaped bulge, so that the cleaning elements 2 can be converged to the gap position between the arc-shaped bulge 4 and the heat exchange tubes at two sides to be more close to the heat exchange tubes under the condition that the cleaning elements are not influenced by air flow. Of course, the shape of the protrusion 4 is not limited to the arc shape of fig. 10, and may be designed as a triangular or square protrusion, to which the present invention is not limited.

In yet another alternative embodiment, the limiting member comprises a separate casing provided outside the adjacent two or more heat exchange tubes 11 and the air flow channel 12 therebetween to form the cleaning space 13; for example, for a self-cleaning heat exchanger 1, the individual housing may be designed to have an outer contour slightly larger than that of the self-cleaning heat exchanger 1, and the individual housing is sleeved on the self-cleaning heat exchanger 1, so that the housing is a space formed by locking all the heat exchange tubes 11 of the whole self-cleaning heat exchanger 1 and the air flow channels 12 therebetween as the cleaning space 13.

The cleaning piece 2 is arranged in the independent housing, and the wall of the independent housing is provided with a plurality of through holes for air flow to pass through so as to ensure that the air flow can flow in and out from the independent housing.

Here, the opening area of the through hole is smaller than the minimum sectional area of the cleaning member 2 to prevent the cleaning member 2 from being separated from the separate housing from the through hole, thereby ensuring the safety of the operation of the air conditioner 3 and avoiding the interference influence of the cleaning member 2 on other devices of the air conditioner 3.

In an alternative embodiment, the cleaning elements 2 are hollow structures made of a lightweight material, including but not limited to rubber or other lighter weight material, which reduces the individual weight of the cleaning elements 2 to make them more easily moved by the airflow in irregular movements.

Here, the shape of the cleaning member 2 is not limited to a spherical shape, and may be designed to be a square shape, an oval shape, or the like.

Preferably, in order to improve the friction dust removing effect, the outer surface of the cleaning elements 2 can be formed with irregular convex structures or designed with fluff, bristles and the like.

In the construction of the self-cleaning heat exchanger 1 shown in fig. 1 and 2, cleaning elements 2 of the same size are arranged in the cleaning space 13; in the structure of the self-cleaning heat exchanger 1 shown in fig. 3 and 4, the cleaning members 2 with different sizes may be disposed in the cleaning space 13, and here, because the sizes and volumes of the cleaning members 2 are different, the contact positions and contact areas of the cleaning members 2 with different sizes when contacting the outer surface of the self-cleaning heat exchanger 1 are also different, and the cleaning members 2 with smaller volumes may rub some small gaps of the self-cleaning heat exchanger 1 and dust in the small space clearly, so as to ensure the overall cleaning effect of the self-cleaning heat exchanger 1.

Fig. 5 is a schematic structural view of the air conditioner 3 of the present invention according to an exemplary embodiment.

As shown in fig. 5, the present invention further provides an air conditioner 3, the air conditioner 3 includes a housing 31, an air duct 32 formed inside the housing 31, a fan 33 disposed in the air duct 32, and an air outlet 34, the air conditioner 3 is further provided with any one of the self-cleaning heat exchangers 1 disclosed in the foregoing embodiments, and the self-cleaning heat exchanger 1 is disposed in the air duct 32.

In an alternative embodiment, the bottom of the cleaning space 13 is provided with a ball storage bin communicating with the cleaning space 13, which can be used as a receiving space for a plurality of cleaning elements 2 at the time of air conditioning shutdown, and as a dust collecting bin for dust cleared by the cleaning elements 2.

Specifically, one of the cleaning spaces 13 defined by the stopper member shown in the foregoing embodiments is an approximately rectangular space, and a ball storage box with an open top is provided at the bottom of the rectangular space; when the air conditioner is operated, airflow flows through the cleaning space 13, the cleaning piece 2 is driven by wind power to move from the ball storage box to the cleaning space 13, and the outer surface of the self-cleaning heat exchanger 1 is subjected to friction dust removal in the moving process; when the air conditioner is stopped, the cleaning pieces 2 move to the ball storage box below under the action of gravity again.

Preferably, the wall of the ball storage box is provided with a plurality of air holes communicated with the air duct 32 of the air conditioner 3, so that when the air current flows through the air duct 32, a part of the air current can enter the wall through the air holes, and thus, the cleaning element 2 can move from the ball storage box to the cleaning space 13 more easily.

Here, the opening area of the air hole is smaller than the minimum cross-sectional area of the cleaning piece 2, so that the cleaning piece 2 is prevented from being separated from the air hole and being discharged out of the ball storage box, the operation safety of the air conditioner 3 is guaranteed, and the interference influence of the cleaning piece 2 on other devices of the air conditioner 3 is avoided.

In an alternative embodiment, the air conditioner 3 is further provided with a ball storage passage, which is provided inside the air conditioner 3 and extends to a service opening of a cabinet of the air conditioner 3, and a ball storage box is provided in the ball storage passage and can be moved into or out of the cabinet through the ball storage passage and the service opening.

Specifically, be equipped with the maintenance mouth on air conditioner 3's the casing, extend into this storage ball passageway to air conditioner 3's inside along the maintenance mouth, be equipped with the slide rail in the storage ball passageway, store up the ball case and remove on the slide rail, like this, store up the ball case and can realize its immigration and remove the operation with the structural style of similar "drawer" to convenience of customers is to the change of cleaning member 2 and the clearance of the dust of collection.

In an alternative embodiment, the air conditioner 3 further comprises: the controllable shielding piece is used for conducting or blocking a communication path between the ball storage box and the cleaning air conditioner 3; in this embodiment, the shielding member is a shielding plate disposed at the top opening of the ball storage box, and the shielding plate is controlled by the driving device to move between a first position where the shielding plate does not shield the top opening and a second position where the shielding plate shields the top opening, so as to achieve the operation of connecting or disconnecting the communication path.

The air conditioner further includes a controller that controls the shutter to perform an operation of conducting or blocking. In this embodiment, the controller controls the operation of the shutter mainly by controlling the operation of the driving means.

For example, the shielding plate is provided with a rack extending along a connecting line direction between a first position and a second position, the driving device is a motor, the end part of a crankshaft of the motor is provided with a gear meshed with the rack, and when the motor runs in the forward direction, the motor drives the shielding plate to move from the first position to the second position through the meshing and matching of the gear and the rack; when the motor runs in the reverse direction, the shielding plate moves from the second position to the first position. Therefore, the controller can realize the operation control of the shielding piece by controlling the running direction of the motor.

In this embodiment, the specific operation of the controller may be performed according to an instruction input by a user, for example, in a shutdown state of the air conditioner, the cleaning element is completely located in the ball storage box, and at this time, the blocking element blocks the communication path; in the running process of the air conditioner, if a first instruction for starting self-cleaning is not received, the shielding piece still blocks the communication path, and at the moment, although airflow flows through the cleaning space, the cleaning piece is limited in the ball storage box, so that the self-cleaning heat exchanger cannot be cleaned by the cleaning piece at the moment; when a first instruction of starting self-cleaning is received, the shielding piece is communicated with the communication path, and at the moment, the airflow can drive the cleaning piece to move into the cleaning space so as to remove impurities such as dust on the self-cleaning heat exchanger by utilizing the irregular movement of the cleaning piece.

When a second command to exit self-cleaning is received, the air conditioner can recover the cleaning members in the cleaning space in two ways: one is to control the fan of the air conditioner to pause, at the moment, as no air flow driven by the fan passes through, the cleaning piece can be gradually settled back into the ball storage box under the action of gravity, after the cleaning piece is completely recovered, the shielding piece blocks the communication path and controls the operation of the restarting fan; and the other is to temporarily not respond to the second instruction, the air conditioner still maintains normal operation, and after the air conditioner is turned off and the fan stops operating, the second instruction is responded, at the moment, the cleaning piece is settled back into the storage ball box, and the shielding piece blocks the communication path.

Here, the specific operation of the controller may also be adjusted according to the operation state of the air conditioner itself, for example, the self-cleaning operation may be controlled to be performed only in a set period in the cooling mode of the air conditioner operation, because there is much dust adhered to the self-cleaning heat exchanger in the high temperature weather in summer of the cooling mode operation, and therefore, the air conditioner generates a first instruction for performing cleaning of the self-cleaning heat exchanger through the set period, so that the cleanliness of the self-cleaning heat exchanger may be effectively ensured, the user experience may be improved, and the damage influence of the low temperature environment on the outer surface of the self-cleaning heat exchanger on the cleaning member may be reduced.

And controlling the self-cleaning operation not to be executed in the air-conditioning operation heating mode, wherein the reason is that the temperature of the outer surface of the self-cleaning heat exchanger is higher in the air-conditioning operation heating mode, and for cleaning pieces made of rubber and other materials, the high temperature easily causes the problems of melting deformation and the like of the cleaning pieces, so that the self-cleaning operation is not executed in the air-conditioning operation heating mode, the service life of the cleaning pieces is ensured, and the problem that the melted cleaning pieces are adhered to the outer surface of the self-cleaning heat exchanger can be avoided.

In an optional embodiment, the air conditioner further comprises a magnetic refrigeration heat exchange device and a refrigerant pipeline; the refrigerant pipeline is respectively connected with the magnetic refrigeration heat exchange device and the heat exchanger to form a circulation loop.

Magnetic refrigeration heat transfer device includes: magnetic working medium bed, magnet, heat exchange cavity, refrigerant pipe and driver. Fig. 6 is a schematic structural diagram of an embodiment of the magnetic refrigeration heat exchange device according to the present invention, and as shown in fig. 6, the magnetic working medium bed 101 is a circular hollow cylinder body, and the magnetic working medium is filled in the cylinder body. The magnet (not shown) is fixed in a sector area of the axis of the magnetic work mass bed, and can be arranged along the radial direction of the magnetic work mass bed 101, such as fixed at the inner side or the outer side of a circular ring of the middle magnetic work mass bed 101, or one magnet is arranged at each of the inner side and the outer side, so as to strengthen the strength of the magnetic field and improve the excitation efficiency; the magnet may be provided along the circular ring surface of the magnetic work bed 101 in the axial direction of the circular ring, that is, when the magnetic work bed 101 is placed horizontally, the magnet may be fixed to the upper side or the lower side of the magnetic work bed 101, or a magnet may be fixed to the upper side and the lower side of the magnetic work bed 101 so as to face each other. The heat exchange chamber 102 is a hollow chamber surrounding a part of the magnetic work bed 101, and the magnetic work bed 101 and the heat exchange chamber 102 are close to each other but do not contact each other. The refrigerant pipe 103 is communicated with the heat exchange cavity 102, and the driver is connected with the magnetic working medium bed 101 and drives the magnetic working medium bed 101 to rotate by taking the circular central axis as the axis. Therefore, when the magnetic working medium body 101 rotates around the center of the circular ring as an axis under the driving of a driver (not shown), the heat exchange cavity 102 still remains static, the fixed position of the heat exchange cavity 102 can be an excitation area, and at this time, the refrigerant in the heat exchange cavity 102 continuously absorbs the cold energy released by the magnetic working medium which is continuously excited due to the rotation of the magnetic working medium bed 101, so that the low-temperature refrigerant is conveyed out through the refrigerant pipe 103; the heat exchange cavity 102 may also be fixed in the demagnetization area, and at this time, the refrigerant in the heat exchange cavity 102 continuously absorbs the heat released by the magnetic working medium that is demagnetized continuously due to the rotation of the magnetic working medium bed 101, so that the high-temperature refrigerant is conveyed out through the refrigerant pipe 103. A controllable bracket can also be arranged and is fixedly connected with the heat exchange cavity 102, the heat exchange cavity 102 is positioned in the excitation area when low-temperature refrigerant is needed, and the heat exchange cavity 102 is positioned in the demagnetization area by the controllable bracket when high-temperature refrigerant is needed. The magnetic body is fixed and static, the magnetic working medium rotates relative to the magnetic body, the area of the magnetic working medium bed 101 close to the magnetic body is an excitation area, the area of the magnetic working medium bed far away from the magnetic body is a demagnetization area, a pipeline is arranged, a refrigerant is arranged in the pipeline, the refrigerant can continuously flow through the pipeline in a circulating way to enter the heat exchange cavity to exchange heat with the magnetic working medium in the excitation area, and the released cold energy is taken away, so that the refrigeration effect is realized; the heat exchange cavity 102 can also be arranged in the demagnetization area to take away heat released by the magnetic medium in the demagnetization area, so that the heating effect is realized. Therefore, the flow of the refrigerant is not required to be controlled by arranging the valve body, and the cold quantity or the heat quantity released by the magnetic working medium can be continuously taken away by the refrigerant, so that the defects of pause, alternation and the like in the conventional magnetic refrigeration system are overcome, the heat exchange efficiency is improved, and the energy consumption is reduced.

Fig. 7 is a top view structural diagram of an embodiment of a magnetic refrigeration heat exchange device according to the present invention, the magnetic refrigeration heat exchange device includes a magnetic working medium bed 201, a heat exchange cavity 202, a refrigerant pipe 203, a first magnet 204, a second magnet 205, a driver 206, and a connecting rod 207, as shown in fig. 7, the magnetic working medium bed 201 is a circular hollow cylinder, and a magnetic working medium is filled in the cylinder. The first magnet 204 and the second magnet 205 are fixed in a sector area of the magnetic work bed, as shown in fig. 7, one magnet is oppositely arranged on the inner side and the outer side of the sector area respectively, so as to strengthen the strength of the magnetic field and improve the excitation efficiency; the magnet may be disposed along the circular ring surface of the magnetic work bed 201 in the axial direction of the circular ring, that is, when the magnetic work bed 201 is placed horizontally, the magnet may be fixed to the upper side or the lower side of the magnetic work bed 201, or a magnet may be fixed to the upper side and the lower side of the magnetic work bed 201 in an opposed manner. The heat exchange chamber 202 is a hollow cavity surrounding a partial region of the magnetic media bed 201, and the magnetic media bed 201 and the heat exchange chamber 202 are close to each other but do not contact each other. The refrigerant pipe 203 is communicated with the heat exchange cavity 202, the driver 206 is connected with the magnetic work bed 201 through the connecting rod 207 and drives the magnetic work bed 201 to rotate by taking a circular central axis of the magnetic work bed 201 as an axis, the driver 206 is arranged at the axis of the magnetic work bed 201, the connecting rod 207 extends to the magnetic work bed 201 from the driver 206 along the radial direction, the connecting point of the connecting rod 207 and the magnetic work bed 201 can be on the inner ring side wall of the magnetic work bed 201, can be on the top surface or the bottom surface of the circular ring surface of the magnetic work bed 207, and can even be connected to the outer ring side wall of the magnetic work bed 207, however, no matter how the connecting rod 207 is connected with the magnetic work bed 201, the heat exchange cavity 202 needs to be correspondingly provided with a passage, so that the connecting rod 207 which synchronously rotates can not be blocked at all when the magnetic work bed 201 rotates. When the magnetic working medium body 201 rotates by taking the center of the circular ring as an axis under the driving of the driver 206, the heat exchange cavity 202 still keeps static, although the fixed position of the heat exchange cavity 202 is an excitation area, the cold medium in the heat exchange cavity 202 continuously absorbs the cold energy released by the magnetic working medium which is continuously excited due to the rotation of the magnetic working medium bed 201, so that the low-temperature cold medium is conveyed out through the cold medium pipe 203; however, it should be understood that the heat exchange cavity 202 may be fixed in the demagnetization area, and in this case, the refrigerant in the heat exchange cavity 202 will continuously absorb the heat released by the magnetic medium that is demagnetized continuously due to the rotation of the magnetic medium bed 201, so as to transport the high temperature refrigerant out through the refrigerant pipe 203. A controllable bracket may also be provided, the bracket is fixedly connected to the heat exchange cavity 202, the heat exchange cavity 202 is positioned in the excitation area when a low-temperature refrigerant is required, and the bracket is controlled to position the heat exchange cavity 202 in the demagnetization area when a high-temperature refrigerant is required. The magnetic body is fixed and static, the magnetic working medium rotates relative to the magnetic body, the area of the magnetic working medium bed 201 close to the magnetic body is an excitation area, the area of the magnetic working medium bed far away from the magnetic body is a demagnetization area, a pipeline is arranged, a refrigerant is arranged in the pipeline, the refrigerant can continuously flow through the pipeline in a circulating way to enter the heat exchange cavity to exchange heat with the magnetic working medium in the excitation area, and the released cold energy is taken away, so that the refrigeration effect is realized; the heat exchange cavity 202 can also be arranged in the demagnetization area to take away the heat released by the magnetic medium in the demagnetization area, thereby realizing the heating effect. Therefore, the flow of the refrigerant is not required to be controlled by arranging the valve body, and the cold quantity or the heat quantity released by the magnetic working medium can be continuously taken away by the refrigerant, so that the defects of pause, alternation and the like in the conventional magnetic refrigeration system are overcome, the heat exchange efficiency is improved, and the energy consumption is reduced.

Fig. 8 is an internal structural view of one embodiment of a magnetic media bed of the magnetic refrigeration heat exchange apparatus according to the present invention. The magnetic working medium bed is a circular hollow cylinder 301, and the hollow cylinder 301 is filled with magnetic working medium, such as nano Gd₃Ga₅O₁₂Nano-alloy, GdSiGe alloy, Gd binary alloy, perovskite oxide, and the like. As shown in fig. 8, in this embodiment, a plurality of partition plates 302 are uniformly distributed in the hollow cylinder 301 to divide the hollow cylinder into a plurality of chambers 303 uniformly arranged in a radial direction, and the chambers 303 are filled with a magnetic medium. Because the compartment 303 makes the magnetic working media isolated regionally, on one hand, the loss of heat between the magnetic working media can be reduced, on the other hand, the utilization rate of the heat can be improved, and the energy consumption is reduced.

Fig. 9 is a schematic structural diagram of another embodiment of the magnetic refrigeration heat exchange device according to the present invention, which includes a magnetic working medium bed 401, a driver (not shown), a first heat exchange cavity 402, a first refrigerant pipe 403, a second heat exchange cavity 404, a second refrigerant pipe 405, and a magnet (not shown), as shown in fig. 7, where the magnetic working medium bed 401 is a circular hollow cylinder, and a magnetic working medium is filled in the cylinder. The magnets (not shown) are fixed in a sector area of the axis of the magnetic work mass bed, and can be arranged along the radial direction of the magnetic work mass bed 401, such as the inner side or the outer side of a circular ring of the middle magnetic work mass bed 401, or one magnet is arranged on each of the inner side and the outer side, so as to strengthen the strength of the magnetic field and improve the excitation efficiency; the magnet may be disposed along the circular ring surface of the magnetic work bed 401 in the axial direction of the circular ring, that is, when the magnetic work bed 401 is placed horizontally, the magnet may be fixed to the upper side or the lower side of the magnetic work bed 401, or a magnet may be fixed to the upper side and the lower side of the magnetic work bed 401 so as to face each other. The first heat exchange cavity 402 and the second heat exchange cavity 404 are hollow cavities respectively surrounding two opposite regions of the magnetic working medium bed 401, and the magnetic working medium bed 401 and the heat exchange cavity 402, and the magnetic working medium bed 401 and the second heat exchange cavity 404 are close to each other but not in contact with each other. The first heat exchange cavity 403 is fixed in the magnetism quenching area, the first refrigerant pipe 403 is communicated with the refrigerating pipeline, the second heat exchange cavity 404 is fixed in the demagnetization area, and the second refrigerant pipe 405 is communicated with the heating pipeline. The driver drives the magnetic working medium bed 401 to rotate, so that the magnetic working medium in the magnetic working medium bed 401 continuously enters the excitation area to release cold energy, and the refrigerant in the first heat exchange cavity 402 can continuously exchange heat, so that a low-temperature refrigerant is output; meanwhile, the excited magnetic medium continuously leaves the magnetic field along with the rotation of the magnetic medium body 401 and enters the demagnetization area, so that the refrigerant in the second heat exchange cavity 404 can be continuously heat exchanged by pumping the first refrigerant pipe 403, and a high-temperature refrigerant is output to the second refrigerant pipe 405. Therefore, in the refrigeration pipeline or the heating pipeline, the refrigerant can respectively carry out continuous heat exchange in the corresponding heat exchange cavity, the heat exchange efficiency is improved, and the energy consumption of the system is effectively reduced. Furthermore, the surface of the magnetic work medium bed is provided with a groove and a convex block along the arc shape of the circular ring, and the surface of the corresponding heat exchange cavity facing the magnetic work medium bed is provided with the convex block and the groove, so that the specific surface area can be increased, and the heat exchange efficiency is improved.

Fig. 11 is a flowchart illustrating a control method of an air conditioner according to the present invention, according to an exemplary embodiment.

As shown in fig. 11, the present invention further provides a cleaning control method for an air conditioner, which can be applied to the flow control for cleaning the air conditioner disclosed in the foregoing; specifically, the flow steps of the cleaning control method mainly include:

s1101, responding to the condition that the air conditioner meets the trigger condition of the self-cleaning mode, and controlling the air conditioner to be switched to the self-cleaning mode to operate; the self-cleaning mode comprises a frost condensation process and a defrosting process which are sequentially carried out;

in an optional embodiment, the self-cleaning process of the air conditioner is set to be controlled to start the self-cleaning process if a certain condition is met when the air conditioner is started, such as a self-cleaning triggering condition;

here, the self-cleaning trigger condition is related to a shutdown duration of the air conditioner; for most of the existing air conditioner models, when the air conditioner is stopped, dust in an indoor environment can enter the air conditioner through the air inlet and is attached to the indoor self-cleaning heat exchanger, and the longer the air conditioner is stopped, the more the amount of the dust attached to the indoor self-cleaning heat exchanger is, which indicates that the air conditioner has the necessity of cleaning; therefore, in the present embodiment, an optional self-cleaning triggering condition is that the shutdown duration of the air conditioner is greater than the set shutdown duration.

Therefore, before the air conditioner performs step S1101, the method further includes the steps of: acquiring operation parameter information of an air conditioner; in this embodiment, the parameter information is the shutdown duration of the air conditioner;

in this embodiment, the shutdown duration is an interval duration from the end of the previous operation of the air conditioner to the start of the current operation; optionally, the shutdown duration may be obtained as follows: when the previous operation of the air conditioner is finished, recording the time corresponding to the end of the operation; when the operation is started, the current starting moment is obtained, and the shutdown duration can be obtained by calculating the time difference between the two moments;

for example, if the time corresponding to the end of the previous operation of the air conditioner is 12:30, and the time corresponding to the start of the current operation is 16:00, the time difference between the two times can be obtained by calculation to be 3.5 hours, so that the shutdown time period of the air conditioner is determined to be 3.5 hours.

Or, in another embodiment, a timer is arranged in the air conditioner, and the timer is started when the operation of the air conditioner is finished and is started from zero; and stopping timing when the air conditioner is restarted, so that the timing duration accumulated when the timer stops timing is the shutdown duration of the air conditioner.

Therefore, when the air conditioner meets the trigger condition of the self-cleaning mode, if the running time of the air conditioner meets the trigger condition of the associated running time, the air conditioner is controlled to be switched to the self-cleaning mode to run.

Specifically, the triggering condition is that the shutdown time of the air conditioner is longer than the set shutdown time. After the shutdown time of the air conditioner is obtained, comparing the shutdown time with the set shutdown time, so as to determine whether the self-cleaning triggering condition is met; for example, if the acquired shutdown duration is 3 hours and the set shutdown duration of the air conditioner is 2.5 hours, it may be determined that the self-cleaning trigger condition has been satisfied by comparing the shutdown duration with the set shutdown duration, so as to perform the self-cleaning operation defined by the subsequent self-cleaning mode; if the acquired shutdown time is 2 hours, the shutdown time is compared with the set shutdown time to determine that the trigger condition is not met, the self-cleaning operation defined by the subsequent self-cleaning mode is not executed, and the process is ended.

Here, the self-cleaning mode includes a frost forming flow and a defrosting flow which are sequentially performed.

Taking the self-cleaning process of the indoor heat exchanger as an example, the working process of the air conditioner in the self-cleaning operation mode mainly comprises two stages which are sequentially carried out: the defrosting stage of the indoor heat exchanger and the defrosting stage of the indoor heat exchanger. In the defrosting stage of the indoor heat exchanger, ice can be condensed and frosted on the indoor heat exchanger of the indoor unit; in the defrosting stage of the indoor heat exchanger, the condensed frost of the indoor heat exchanger in the previous defrosting stage is melted, impurities such as dust and the like can be separated from the indoor heat exchanger along with the melted condensed water, and the cleaning treatment of the indoor heat exchanger is completed.

Specifically, in the operation process of the air conditioner in the cooling mode, if the power of the compressor is increased and the output quantity of the refrigerant is increased, the quantity of the low-temperature refrigerant input into the indoor unit can be increased, the internal temperature of the indoor unit can be reduced by the cold quantity of the redundant refrigerant, and when the internal temperature of the indoor unit is lower than the frost condensation critical temperature value (such as 0 ℃), the water vapor in the air flowing through the indoor unit can be gradually condensed into frost in the indoor unit.

In the heating mode operation process of the air conditioner, the high-temperature refrigerant firstly flows through the indoor heat exchanger, so that the cold energy of the high-temperature refrigerant can increase the internal temperature of the indoor unit, and when the internal temperature of the indoor unit is higher than the frost condensation critical temperature value (such as 0 ℃), frost condensed in the indoor unit can be gradually melted and dripped, so that the frost can be separated from the indoor heat exchanger. The control method of the invention is that under the condition that the air conditioner is controlled to flow in the direction of the refrigerant flow limited by the heating mode at the defrosting stage of the indoor heat exchanger, the defrosting operation of the indoor heat exchanger is realized by adjusting the operation parameters of components such as a compressor, a fan, a throttling device and the like.

And S1102, controlling a fan of the air conditioner to operate according to set parameters after the defrosting process is finished.

When the air conditioner executes the self-cleaning mode, the dust adhered to the self-cleaning heat exchanger can be stripped off by the defrosting flow and the defrosting flow, and can be converged into the water pan along with the condensed water in the defrosting stage, so that the one-time cleaning operation of the heat exchanger is realized; however, the defrosting process and the defrosting process mainly aim at cleaning the pollutants such as oil stains, dust and the like with strong adhesion and small volume, and the cleaning effect is limited for the massive or granular pollutants with large volume, so that after the defrosting process in the step S1102 is completed, the fan of the air conditioner is controlled to operate according to set parameters, the fan operates to generate air flow, when the air flow flows through the cleaning space, the cleaning piece can be driven by the wind force of the air flow to move irregularly in the cleaning space, and when the cleaning piece is in operation contact with the outer surface of the self-cleaning heat exchanger, the cleaning piece can rub the outer surface of the self-cleaning heat exchanger, so that the dirt adhered to the outer surface is rubbed clearly, and the function similar to a 'rag' can be achieved; therefore, under the condition that the self-cleaning triggering condition is met through the parameter information, the aim of carrying out secondary self-cleaning on the self-cleaning heat exchanger by using the cleaning piece can be achieved only by controlling the operation mode of the fan and enabling the air flow generated by the operation of the fan to drive the cleaning piece to operate.

In an alternative embodiment, before the air conditioner performs the defrosting process of the self-cleaning mode, the cleaning control method further includes: determining respective defrosting time lengths of the self-cleaning heat exchanger and the cleaning piece; and determining the defrosting time with a larger value in the self-cleaning heat exchanger and the cleaning piece as the running time of the defrosting process.

Here, in some air conditioner models that perform heat exchanger self-cleaning by using frost condensation and defrosting, the frost condensation parameter and the defrosting parameter in the self-cleaning mode are fixed parameters, and for example, the frost condensation temperature, the frost condensation time length, the defrosting time length, and the like are fixed values, and the air conditioner model does not need to execute the relevant steps for determining the operation time length of the defrosting process.

In other air conditioner models in which the condensation parameters and the defrosting parameters of the self-cleaning mode are non-fixed parameters, because the condensation parameters of the condensation process of the air conditioner are different when the air conditioner executes the self-cleaning mode each time, the parameters of the air conditioner in the defrosting process are also different, for example, if the scaling degree of the air conditioner is judged to be serious in a certain self-cleaning process, the setting of the condensation temperature is low and the setting of the condensation duration is long in the condensation parameters of the condensation process in the self-cleaning process, so that the cleaning and stripping effects on pollutants are improved; at this time, in the icing and frosting process of the frost condensation stage, frost is condensed on both the self-cleaning heat exchanger and the cleaning piece, and the time for realizing complete defrosting in the defrosting process is different because the self-cleaning heat exchanger and the cleaning piece are obviously different in material, volume and shape. Here, before the air conditioner leaves the factory, under the condition that different frost formation parameter settings can be determined through experiments and other manners, the time length required by the self-cleaning heat exchanger and the cleaning piece to achieve complete defrosting respectively is long, and a mapping relation between the frost formation parameter and the defrosting time length of the self-cleaning heat exchanger and the cleaning piece is constructed, so that after the frost formation parameter of the air conditioner is determined, the respective defrosting time length of the self-cleaning heat exchanger and the cleaning piece can be further determined according to the mapping relation.

In this embodiment, the defrosting time of the defrosting process of the air conditioner is taken from the defrosting time with a larger value in the self-cleaning heat exchanger and the cleaning member. Therefore, the cleaning object aimed by the self-cleaning mode of the invention not only comprises the self-cleaning heat exchanger, but also comprises the cleaning piece, so that after the defrosting process is finished in the defrosting time with a larger value in the self-cleaning heat exchanger and the cleaning piece, pollutants adhered to the self-cleaning heat exchanger and the cleaning piece can be effectively removed. Meanwhile, after the defrosting process of the air conditioner is finished, the cleaning piece is in a dry state, redundant frost or condensed water cannot be left, and therefore the air conditioner can be ensured not to throw water drops and the like during the process that a fan of the air conditioner operates to drive the cleaning piece to carry out secondary self-cleaning, and the use experience of a user is ensured.

In an alternative embodiment, the step S1102 of controlling the fan of the air conditioner to operate according to the set parameters includes: controlling a fan of the air conditioner to operate at a first set parameter, wherein the first set parameter comprises: the rotating speed of the fan is a first rotating speed, the rotating direction is a first rotating direction, and the duration is a first duration.

In the present embodiment, the first rotation speed is a set rotation speed value, such as 300r/min, 500r/min, etc.

In this embodiment, the first turning direction is a positive turning direction of the fan, and when the fan runs in the positive turning direction, the airflow direction in the indoor unit can be limited to flow from the air inlet to the air outlet.

In this embodiment, the first duration is a set duration value, such as 5min, 10min, etc.

In yet another alternative embodiment, the controlling the fan of the air conditioner to operate at the set parameter in step S101102 includes: after the defrosting process of the air conditioner is finished, firstly controlling a fan of the air conditioner to operate according to a first set parameter; and then, controlling the fan of the air conditioner to be switched to operate according to a second set parameter, wherein the second set parameter comprises: the rotating speed of the fan is a second rotating speed which is greater than the first rotating speed, the turning direction is a first turning direction, and the duration is a second duration.

In this embodiment, the second rotation speed is greater than the first rotation speed, so in the self-cleaning process of the air conditioner, the fan is controlled in a variable rotation speed manner; in the first stage, a fan of the air conditioner runs at a first rotating speed with a smaller wind speed, so that airflow generated by the running of the fan drives a cleaning piece to move, and light dust attached to an indoor self-cleaning heat exchanger is removed; then, in the second stage, the fan of the air conditioner is adjusted to the second rotating speed with larger wind speed to operate, and the flow velocity of the airflow generated by the operation of the fan is increased, so that the operation degree of the cleaning piece is more violent, and the heavy dust attached to the indoor self-cleaning heat exchanger can be removed.

Like this, through the operation with the form control fan of variable rotational speed, can clear away to the dust that the degree of adhesion is light and heavy different on the indoor automatically cleaning heat exchanger, very big improvement the whole clean effect of cleaning member to guarantee can clear away most dust on the indoor automatically cleaning heat exchanger.

Specifically, the first rotating speed value can be 300r/min, 500r/min and other rotating speed values, and the second rotating speed value can be 800r/min, 1000r/min and other rotating speed values.

In yet another alternative embodiment, the controlling the fan of the air conditioner to operate with the set parameters in step S1102 includes: after the defrosting process of the air conditioner is finished, firstly controlling a fan of the air conditioner to operate according to a first set parameter; and then, controlling the fan of the air conditioner to be switched to operate according to a third set parameter, wherein the third set parameter comprises: the rotating speed of the fan is a third rotating speed, the rotating direction is a second rotating direction opposite to the first rotating direction, and the time duration is a third time duration.

In the embodiment, the second turning direction is opposite to the first turning direction, therefore, in the self-cleaning process of the air conditioner, the fan is controlled in a turning-variable mode; in the first stage, a fan of the air conditioner runs in a first rotating direction, so that the air flow in a first flow direction generated by the running of the fan drives a cleaning piece to move, the cleaning piece mainly rubs with the indoor self-cleaning heat exchanger in the running direction of the first flow direction, and dust on the indoor self-cleaning heat exchanger is removed; and then, in a second stage, the fan of the air conditioner is switched to a second rotation direction to operate, so that the air flow in a second flow direction generated by the operation of the fan drives the cleaning piece to move, the first flow direction is different from the second flow direction, and the cleaning piece can rub the indoor self-cleaning heat exchanger mainly in the operation direction of the second flow direction to remove dust on the indoor self-cleaning heat exchanger.

Therefore, the operation of the fan is controlled in a mode of changing the direction, the cleaning piece can move in different directions at different stages, dust on the indoor self-cleaning heat exchanger is removed, and the dust removing effect can be improved by the moving state of the cleaning piece in two-way friction.

Specifically, the first turning direction is positive turning direction of the fan, and when the fan runs in the positive turning direction, the airflow flow direction in the indoor unit can be limited to flow from the air inlet to the air outlet; the second turning direction is the reverse turning direction of the fan, and when the fan runs in the reverse turning direction, the airflow flowing direction in the indoor unit can be limited to flow from the air outlet to the air inlet.

In an alternative embodiment, the process of controlling the fan of the air conditioner to operate at the set parameters in step S1102 is a combination of the two embodiments, and includes:

in the first stage, a fan of the air conditioner operates according to a first set parameter, so that airflow in a first flow direction generated by the operation of the fan drives a cleaning piece to move, the cleaning piece mainly rubs with an indoor self-cleaning heat exchanger in the operation direction of the first flow direction, and residual dust on the indoor self-cleaning heat exchanger is removed;

in the second stage, the fan of the air conditioner operates according to a second set parameter, the speed is increased to a second rotating speed with larger wind speed, and the flow speed of airflow generated by the operation of the fan is increased, so that the operation degree of the cleaning piece is more violent, and heavier dust attached to the indoor self-cleaning heat exchanger can be removed;

and in the third stage, the fan of the air conditioner operates according to a third set parameter and is switched to a second steering operation, so that the cleaning piece is driven to move by airflow in a second flow direction generated by the operation of the fan, the first flow direction is different from the second flow direction, and the cleaning piece can rub the indoor self-cleaning heat exchanger mainly in the operation direction of the second flow direction to remove dust on the indoor self-cleaning heat exchanger.

Preferably, the order of the second stage and the third stage in the above embodiments can be interchanged.

In this embodiment, the air conditioner may periodically repeat the operation stages in the above embodiments in a single self-cleaning process.

Accordingly, in order that the air conditioner in the foregoing embodiment may perform the self-cleaning process, the air conditioner further includes a controller for: controlling the air conditioner to be switched to the self-cleaning mode to operate in response to the air conditioner meeting the trigger condition of the self-cleaning mode; the self-cleaning mode comprises a frost condensation process and a defrosting process which are sequentially carried out; and after the defrosting process is finished, controlling a fan of the air conditioner to operate according to set parameters.

In an alternative embodiment, the controller is further configured to: determining respective defrosting time lengths of the self-cleaning heat exchanger and the cleaning piece; and determining the defrosting time with a larger value in the self-cleaning heat exchanger and the cleaning piece as the running time of the defrosting process.

In an alternative embodiment, the controller is specifically configured to: controlling a fan of the air conditioner to operate at a first set parameter, wherein the first set parameter comprises: the rotating speed of the fan is a first rotating speed, the rotating direction is a first rotating direction, and the duration is a first duration.

In an alternative embodiment, the controller is further specifically configured to: after controlling the fan of the air conditioner to operate at the first set parameter, controlling the fan of the air conditioner to switch to operate at a second set parameter, wherein the second set parameter comprises: the rotating speed of the fan is a second rotating speed which is greater than the first rotating speed, the turning direction is a first turning direction, and the duration is a second duration.

In an alternative embodiment, the controller is further specifically configured to: after controlling the fan of the air conditioner to operate at the first set parameter, controlling the fan of the air conditioner to switch to operate at a third set parameter, wherein the third set parameter comprises: the rotating speed of the fan is a third rotating speed, the rotating direction is a second rotating direction opposite to the first rotating direction, and the time duration is a third time duration.

It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A cleaning control method of an air conditioner is characterized in that the air conditioner is provided with a self-cleaning heat exchanger and a fan, the self-cleaning heat exchanger comprises a plurality of heat exchange tubes which are arranged at intervals, an airflow channel is formed between every two adjacent heat exchange tubes, and the self-cleaning heat exchanger also comprises: at least one set of limiting members, each set of limiting members limits two or more adjacent heat exchange tubes and the airflow channel between the adjacent heat exchange tubes into a cleaning space, and the limiting members can be used for allowing the airflow flowing through the cleaning space to pass through; one or more cleaning pieces are limited in the cleaning space, and the cleaning pieces can be driven by the airflow to move in the limited space; the cleaning control method includes:

controlling the air conditioner to be switched to a self-cleaning mode to operate in response to the air conditioner meeting a trigger condition of the self-cleaning mode; the self-cleaning mode comprises a frost condensation process and a defrosting process which are sequentially carried out;

and after the defrosting process is finished, controlling the fan of the air conditioner to operate according to set parameters.

2. The cleaning control method according to claim 1, characterized by further comprising:

determining respective defrosting durations of the self-cleaning heat exchanger and the cleaning member;

3. The cleaning control method according to claim 1, wherein the controlling the fan of the air conditioner to operate at set parameters includes:

4. The cleaning control method according to claim 3, wherein the controlling the fan of the air conditioner to operate at set parameters further comprises:

after controlling the fan of the air conditioner to operate at a first set parameter, controlling the fan of the air conditioner to switch to operate at a second set parameter, wherein the second set parameter comprises: the rotating speed of the fan is a second rotating speed which is greater than the first rotating speed, the rotating direction is a first rotating direction, and the duration is a second duration.

5. The cleaning control method according to claim 3, wherein the controlling the fan of the air conditioner to operate at set parameters further comprises:

6. An air conditioner, characterized in that, the air conditioner has self-cleaning heat exchanger and fan, self-cleaning heat exchanger includes a plurality of heat exchange tubes of arranging at interval, forms the air current passageway between the adjacent heat exchange tube, and self-cleaning heat exchanger still includes: at least one set of limiting members, each set of limiting members limits two or more adjacent heat exchange tubes and the airflow channel between the adjacent heat exchange tubes into a cleaning space, and the limiting members can be used for allowing the airflow flowing through the cleaning space to pass through; one or more cleaning pieces are limited in the cleaning space, and the cleaning pieces can be driven by the airflow to move in the limited space; the air conditioner further includes a controller for:

7. The air conditioner of claim 6, wherein the controller is further configured to:

8. The air conditioner of claim 6, wherein the controller is specifically configured to:

9. The air conditioner of claim 8, wherein the controller is further specifically configured to:

10. The air conditioner of claim 8, wherein the controller is further specifically configured to: