Air conditioner partition self-cleaning control method and air conditioner

Abstract

According to the air conditioner partition self-cleaning control method and the air conditioner, the windward side of an indoor heat exchanger is divided into a plurality of to-be-cleaned areas, and a wind shielding structure is used for shielding or exposing any to-be-cleaned area; in the subarea self-cleaning mode, executing m times of micro-frost rinsing process for any to-be-cleaned area; the micro-frost rinsing process comprises the following steps that refrigeration operation is conducted, a compressor operates, an outer fan rotates, an inner fan rotates, the opening degree of an electronic expansion valve is the set frosting opening degree, a wind shielding structure acts to shield a to-be-cleaned area, and the to-be-cleaned area starts to frost; when the frosting ending condition is met, the opening degree of the electronic expansion valve is increased to the set defrosting opening degree or / and the outer fan stops rotating or / and the air blocking structure acts to expose the to-be-cleaned area, and defrosting is started in the to-be-cleaned area; when the defrosting ending condition is met, it is judged that defrosting of the to-be-cleaned area is completed; the technical problem that in the prior art, the refrigeration requirement of a user cannot be met during self-cleaning of an indoor heat exchanger is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of air conditioning, and in particular relates to a partitioned self-cleaning control method for an air conditioner and an air conditioner. Background Art

[0002] At present, many air conditioner manufacturers have launched air conditioner self-cleaning mode. The principle is to control the system to make the evaporation temperature of the indoor heat exchanger or outdoor heat exchanger reach sub-zero temperature, so that the condensed water will frost and expand on the surface of the heat exchanger, and the dust will be peeled off from the fins. When the frost reaches a certain level, it will defrost quickly and the dust will be discharged with the condensed water.

[0003] However, the air conditioner cannot perform cooling operation when it is in normal self-cleaning mode, resulting in the user being unable to use the air conditioner for cooling and air supply during the self-cleaning process.

[0004] Therefore, the current air conditioner cannot run the cooling mode and the self-cleaning mode at the same time, and can only run one of the modes. In the self-cleaning mode, the user's cooling experience is affected. Summary of the invention

[0005] The present invention provides a zoned self-cleaning control method for an air conditioner, which solves the technical problem in the prior art that the indoor heat exchanger cannot meet the cooling demand of users during self-cleaning.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0007] A method for controlling the self-cleaning of an air conditioner by partitioning the windward side of an indoor heat exchanger of an indoor unit of the air conditioner into a plurality of areas to be cleaned; a wind shielding structure is arranged in the air duct of the indoor unit of the air conditioner to shield or expose any of the areas to be cleaned;

[0008] The partition self-cleaning control method comprises:

[0009] Controlling the air conditioner to enter a zoned self-cleaning mode, and in the zoned self-cleaning mode, performing m times of light frost rinsing process for any of the areas to be cleaned; m ≥ 2;

[0010] The micro-frost rinsing process comprises the following steps:

[0011] The air conditioner is in cooling operation, the compressor is running, the external fan is rotating, the internal fan is rotating, the opening of the electronic expansion valve is set to the frosting opening, the wind shielding structure is controlled to move to shield the area to be cleaned, and the area to be cleaned begins to frost;

[0012] When the frosting end condition is met, the opening of the electronic expansion valve is controlled to increase to the set defrosting opening, or / and, the external fan is controlled to stop rotating, or / and, the wind shield structure is controlled to move to expose the area to be cleaned, and the area to be cleaned starts to defrost;

[0013] When the defrosting end condition is met, determining that the area to be cleaned has completed defrosting;

[0014] Among them, the set frosting opening is less than the set defrosting opening.

[0015] In some embodiments of the present application, the partition self-cleaning control method further includes:

[0016] Obtain the air outlet temperature T1 of the air outlet in the partition self-cleaning mode and the air outlet temperature T2 of the air outlet before entering the partition self-cleaning mode;

[0017] When the outlet air temperature T1 is higher than the outlet air temperature T2, the opening of the electronic expansion valve is increased, or / and the speed of the external fan is increased, or / and the frequency of the compressor is increased.

[0018] In some embodiments of the present application, the partition self-cleaning control method further includes:

[0019] Obtaining the coil temperature T3 of any area to be cleaned except the area to be cleaned currently being cleaned in the zoned self-cleaning mode, and the coil temperature T4 of the area before entering the zoned self-cleaning mode;

[0020] When the coil temperature T3 is higher than the coil temperature T4, the opening of the electronic expansion valve is increased, or / and the speed of the external fan is increased, or / and the frequency of the compressor is increased.

[0021] In some embodiments of the present application, the partition self-cleaning control method further includes:

[0022] Obtain the outlet air velocity V1 in the partition self-cleaning mode and the outlet air velocity V0 before entering the partition self-cleaning mode;

[0023] When the absolute value of the difference between the air outlet speed V1 and the air outlet speed V0 exceeds the set difference, the internal fan speed is adjusted so that the absolute value of the difference between the air outlet speed in the partitioned self-cleaning mode and the air outlet speed before entering the partitioned self-cleaning mode does not exceed the set difference.

[0024] In some embodiments of the present application, two conductive terminals are spaced apart on the surface of each area to be cleaned;

[0025] The frosting end condition is: the current value between the two conductive terminals of the area to be cleaned ∈ (0, first current threshold];

[0026] The defrosting end condition is: the current value between the two conductive terminals of the area to be cleaned is greater than or equal to a second current threshold;

[0027] Wherein, the first current threshold is less than the second current threshold.

[0028] In some embodiments of the present application, the frosting end condition is: the coil temperature of the area to be cleaned reaches a first temperature range;

[0029] The defrosting end condition is: the coil temperature of the area to be cleaned reaches the second temperature range;

[0030] Among them, any value in the first temperature range is less than 0; and any value in the second temperature range is greater than 0.

[0031] In some embodiments of the present application, the frosting end condition is: the time duration of the area to be cleaned being blocked reaches a first set time duration;

[0032] The defrosting end condition is: the defrosting time of the area to be cleaned reaches a second set time.

[0033] In some embodiments of the present application, in the zoned self-cleaning mode, the micro-frost rinsing process is continuously performed m times for each of the areas to be cleaned from top to bottom.

[0034] In some embodiments of the present application, in the partitioned self-cleaning mode, when the wind shield structure is activated, the rotation speed of the internal fan is reduced.

[0035] Based on the design of the above-mentioned air conditioner zone self-cleaning control method, the present invention proposes an air conditioner, which adopts the above-mentioned air conditioner zone self-cleaning control method.

[0036] Compared with the prior art, the advantages and positive effects of the present invention are as follows: the air conditioner zoned self-cleaning control method and the air conditioner of the present invention divide the windward side of the indoor heat exchanger into a plurality of areas to be cleaned, and the wind shield structure is used to shield or expose any area to be cleaned; the air conditioner is controlled to enter the zoned self-cleaning mode, and in the zoned self-cleaning mode, m times of micro-frost rinsing process is performed for any area to be cleaned; the micro-frost rinsing process includes the following steps: the air conditioner is in cooling operation, the compressor is running, the external fan is rotating, the internal fan is rotating, the opening of the electronic expansion valve is the set frosting opening, the wind shield structure is controlled to move to shield the area to be cleaned, and the area to be cleaned begins to frost; when the frosting end condition is met, the electronic expansion valve is controlled to The opening degree is increased to the set defrost opening degree, or / and, the external fan is controlled to stop rotating, or / and, the wind shield structure is controlled to expose the area to be cleaned, and the area to be cleaned begins to defrost; when the defrost end condition is met, it is determined that the area to be cleaned has completed defrosting; therefore, the air conditioner partition self-cleaning control method of the present invention, when a micro-frost rinsing process is performed on one of the areas to be cleaned, the remaining areas to be cleaned are not blocked, and heat can be exchanged normally to ensure the user's cooling needs, which not only realizes the self-cleaning of the area to be cleaned on the windward side of the indoor heat exchanger, but also does not affect the cooling, ensuring the user's cooling needs, solving the technical problem that the indoor heat exchanger in the prior art cannot meet the user's cooling needs during self-cleaning, and improving the user's experience. Moreover, for any area to be cleaned, through m micro-frost rinsing processes, m frosting and defrosting processes are realized, that is, m micro-frost stripping and defrosting rinsing are realized, the cleaning effect of the indoor heat exchanger is improved, and the cleaning time is shortened, solving the technical problems of poor cleaning effect and long cleaning time of the indoor heat exchanger.

[0037] Other features and advantages of the present invention will become more apparent after reading the detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0039] Figure 1 It is a flow chart of an embodiment of the air conditioner partition self-cleaning control method proposed by the present invention;

[0040] Figure 2 It is a flow chart of another embodiment of the air conditioner partition self-cleaning control method proposed by the present invention;

[0041] Figure 3 It is a flow chart of another embodiment of the air conditioner partition self-cleaning control method proposed by the present invention;

[0042] Figure 4 It is a flow chart of another embodiment of the air conditioner partition self-cleaning control method proposed by the present invention;

[0043] Figure 5 This is a left side view of an embodiment of the air conditioner indoor unit proposed by the present invention when the wind shield does not block the windward side;

[0044] Figure 6 It is a left view of an embodiment of the indoor unit of the air conditioner proposed by the present invention when the wind shield shields the upper area to be cleaned on the windward side;

[0045] Figure 7 It is a left view of an embodiment of the indoor unit of the air conditioner proposed by the present invention when the wind shield shields the lower area to be cleaned on the windward side;

[0046] Figure 8 is a rear view of another embodiment of the air conditioner indoor unit proposed by the present invention when the telescopic windshield is retracted;

[0047] Fig. 9 It is a rear view of another embodiment of the indoor unit of the air conditioner proposed by the present invention, in which a telescopic windshield is extended and the other windshields are retracted;

[0048] Fig.10 It is a left side view of an embodiment of the indoor unit of the air conditioner proposed by the present invention when the reel is rolled up;

[0049] Fig.11 It is a left side view of an embodiment of the air conditioner indoor unit proposed by the present invention, when the upper reel is unfolded and the lower reel is rolled up;

[0050] Fig.12 It is a left side view of an embodiment of the air conditioner indoor unit proposed by the present invention, when the upper reel is rolled up and the lower reel is unfolded;

[0051] Fig.13 It is a rear view of another embodiment of the air conditioner indoor unit proposed by the present invention when the horizontal scroll is rolled up;

[0052] Fig.14 It is a rear view of another embodiment of the air conditioner indoor unit proposed by the present invention, when one horizontal scroll is unfolded and the other horizontal scrolls are rolled up;

[0053] Fig.15 It is a schematic diagram of the circuit connection between the conductive terminal and the micro-current monitoring device.

[0054] Reference numerals:

[0055] 10. Shell; 11. Air outlet;

[0056] 20. Internal fan; 21. Air outlet;

[0057] 30. Indoor heat exchanger; 31. Fin; 32. Coil;

[0058] 40. Electric auxiliary heating device;

[0059] 50. windshield; 51. rotating shaft;

[0060] 60. Telescopic windshield;

[0061] 70. Roller blinds; 71. Scrolls;

[0062] 80. Horizontal roller blinds; 81. Roller. DETAILED DESCRIPTION

[0063] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0064] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0065] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0066] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0067] The air conditioner includes a compressor, a four-way valve, an indoor heat exchanger, an electronic expansion valve, an outdoor heat exchanger, an indoor fan, an outdoor fan, etc. The compressor, the four-way valve, the indoor heat exchanger, the electronic expansion valve, and the outdoor heat exchanger form a circulation system of the refrigerant. The air conditioner performs a cooling and heating cycle by using a compressor, an outdoor heat exchanger, an electronic expansion valve, and an indoor heat exchanger.

[0068] The outdoor unit of the air conditioner includes a compressor, a four-way valve, an outdoor heat exchanger, and an outdoor fan. The indoor unit of the air conditioner includes an indoor heat exchanger, an indoor fan, etc. The electronic expansion valve can be set in both the outdoor unit and the indoor unit of the air conditioner.

[0069] Embodiment 1

[0070] The indoor unit of the air conditioner includes a housing 10, an indoor fan 20, an indoor heat exchanger 30, a wind shielding structure, a controller, etc. Figure 5 As shown,

[0071] The housing 10 has an air outlet 11 and an air return port; the housing 10 has an air duct connecting the air return port and the air outlet 11 .

[0072] The internal fan 20 is arranged in the air duct, close to the return air outlet.

[0073] The indoor heat exchanger 30 is arranged in the air duct, near the air outlet 11. The windward side of the indoor heat exchanger 30 is divided into a plurality of areas to be cleaned. In this embodiment, the indoor heat exchanger is a flat plate evaporator. The surface of the indoor heat exchanger 30 has fins 31.

[0074] The air outlet 21 of the indoor fan 20 faces the windward side of the indoor heat exchanger 30 , and the air outlet of the indoor fan 20 blows toward the windward side of the indoor heat exchanger 30 .

[0075] The wind shield structure is movably arranged in the air duct, and is used to shield or expose any area to be cleaned on the windward side of the indoor heat exchanger 30. The wind shield structure can be driven by a stepper motor or other driving mechanism to shield or expose any area to be cleaned.

[0076] An electric auxiliary heating device 40 is also provided in the air duct to increase the outlet air temperature. The controller controls whether the electric auxiliary heating device 40 works or not.

[0077] The air conditioner adopts the air conditioner partition self-cleaning control method of embodiment 1. Specifically, the air conditioner controller executes the air conditioner partition self-cleaning control method of embodiment 1.

[0078] The air conditioner partition self-cleaning control method of this embodiment mainly includes the following steps: Figure 1 shown.

[0079] The air conditioner is controlled to enter the zoned self-cleaning mode. In the zoned self-cleaning mode, m micro-frost rinsing processes are performed for any area to be cleaned; m ≥ 2.

[0080] Each light frost rinse process includes the following steps, see Figure 1 shown.

[0081] Step S11: Control the air conditioner to operate in cooling mode, the compressor to operate (at a first set frequency), the outdoor fan to rotate (at a set outdoor unit speed), the indoor fan to rotate (at a set indoor unit speed), the opening of the electronic expansion valve to a set frosting opening, and control the movement of the wind shield structure to shield the area to be cleaned, so that the shielded area to be cleaned enters the frosting stage and begins to frost.

[0082] The blocked area to be cleaned cannot exchange heat due to lack of air circulation. The evaporation temperature of the area to be cleaned drops rapidly, and condensed water forms frost. During the frosting stage, frost forms on the surface of the area to be cleaned, and the dust on the surface is removed. Micro-frost removal is achieved.

[0083] The remaining unobstructed areas to be cleaned will not frost because they can exchange heat normally with the air blown out by the internal fan. The air after heat exchange is blown into the room through the shell air outlet 11, reducing the indoor temperature and meeting the user's cooling needs.

[0084] Step S12: Determine whether the frosting end condition is met.

[0085] When the frosting end condition is met, it is determined that the shielded area to be cleaned reaches a slightly frosted state, the fins are slightly frosted and cold expanded to remove dust, and then step S13 is executed.

[0086] Step S13: Control the opening of the electronic expansion valve to increase to the set defrost opening, or / and, control the external fan to stop rotating, or / and, control the wind shield structure to move to expose the area to be cleaned, so that the area to be cleaned enters the defrost stage, and the area to be cleaned starts to defrost.

[0087] When the opening of the electronic expansion valve increases to the set defrost opening, the refrigerant flow increases, and the evaporation temperature of the refrigerant in the indoor heat exchanger rises rapidly, causing the frost formed on the surface of the area to be cleaned to begin to melt.

[0088] When the outdoor fan stops rotating, the temperature of the refrigerant in the indoor heat exchanger rises, and the surface of the area to be cleaned begins to defrost.

[0089] When the shielded area to be cleaned is exposed, the area to be cleaned can exchange heat normally with the wind blown by the internal fan, so that the surface of the area to be cleaned can defrost quickly.

[0090] Therefore, the opening of the electronic expansion valve is increased to the set defrost opening, the external fan stops rotating, and the area to be cleaned is exposed. These three methods can make the area to be cleaned enter the defrost stage and the area to be cleaned begins to defrost.

[0091] During the defrosting stage, the surface of the area to be cleaned begins to defrost, washing away the dust and achieving defrosting rinsing.

[0092] Step S14: Determine whether the defrosting end condition is met.

[0093] When the defrosting end condition is met, step S15 is executed: determining whether the area to be cleaned has completed defrosting.

[0094] After defrosting is completed, the opening of the electronic expansion valve is set to the frosting opening, the outdoor fan rotates (at the set outdoor unit speed), the wind shield structure is controlled to shield the area to be cleaned, and the area to be cleaned begins to frost again.

[0095] Among them, the set frosting opening < the set defrosting opening ≤ the maximum opening of the electronic expansion valve.

[0096] For each area to be cleaned, steps S11 to S15 are performed m times in succession to complete self-cleaning of each area to be cleaned.

[0097] Under the refrigeration condition, the inner fan keeps rotating, and the wind shield structure shields the area to be cleaned on the windward side of the indoor heat exchanger, so that the surface of the shielded area to be cleaned is quickly frosted; the unshielded area can exchange heat normally with the wind blown by the inner fan to meet the user's refrigeration needs; when the frost end condition is met, it is determined that the shielded area to be cleaned has reached a slightly frosted state, then the opening of the electronic expansion valve is increased to the set defrost opening or / and the outer fan stops rotating or / and the area to be cleaned is exposed, so that the evaporation temperature of the refrigerant in the indoor heat exchanger rises rapidly, and the surface of the area to be cleaned is quickly defrosted; when the defrost end condition is met, it is determined that the area to be cleaned has completed defrosting, and then the opening of the electronic expansion valve is adjusted to the set frosting opening, the outer fan rotates, and the area to be cleaned is shielded, so that the fins of the indoor heat exchanger start to frost quickly again, and the frosting and defrosting process is repeated m times. Through high-frequency micro-frost stripping and defrosting rinsing, the area to be cleaned can achieve a better cleaning effect in a shorter time.

[0098] By adjusting the opening of the electronic expansion valve (switching between the set frosting opening and the set defrosting opening), the start and stop control of the external fan, and whether the wind shield structure blocks the area to be cleaned, the frosting and defrosting of the area to be cleaned are controlled to achieve the switching between the frosting and defrosting stages; the completion of micro-frost and defrosting is judged by the frosting end conditions and the defrosting end conditions, and the switching speed between the frosting and defrosting stages is fast, so that the indoor heat exchanger can be cleaned in a shorter time.

[0099] The windward side of the indoor heat exchanger is divided into n areas to be cleaned, where n ≥ 2. When self-cleaning is performed on one of the areas to be cleaned, the other n-1 areas to be cleaned can exchange heat normally, meeting the user's cooling needs and reducing the impact of self-cleaning on cooling.

[0100] The air conditioner partition self-cleaning control method of the present embodiment is to divide the windward side of the indoor heat exchanger into a plurality of areas to be cleaned, and the wind shield structure is used to shield or expose any area to be cleaned; the air conditioner is controlled to enter the partition self-cleaning mode, and in the partition self-cleaning mode, m times of micro-frost rinsing process are performed for any area to be cleaned; the micro-frost rinsing process includes the following steps: the air conditioner is in cooling operation, the compressor is running, the external fan is rotating, the internal fan is rotating, the opening of the electronic expansion valve is set to the frosting opening, the wind shield structure is controlled to move to shield the area to be cleaned, and the area to be cleaned begins to frost; when the frosting end condition is met, the opening of the electronic expansion valve is controlled to increase to the set defrosting opening, Or / and, control the external fan to stop rotating, or / and, control the wind shield structure to expose the area to be cleaned, and the area to be cleaned begins to defrost; when the defrosting end condition is met, it is determined that the area to be cleaned has completed defrosting; therefore, in the air conditioner partition self-cleaning control method of this embodiment, when a micro-frost rinsing process is performed on one of the areas to be cleaned, the remaining areas to be cleaned are not blocked, and heat can be exchanged normally to ensure the user's cooling needs, which not only realizes the self-cleaning of the area to be cleaned on the windward side of the indoor heat exchanger, but also does not affect the cooling, ensuring the user's cooling needs, solving the technical problem that the indoor heat exchanger in the prior art cannot meet the user's cooling needs during self-cleaning, and improving the user's experience. Moreover, for any area to be cleaned, through m micro-frost rinsing processes, m frosting and defrosting processes are realized, that is, m micro-frost stripping and defrosting rinsing are realized, the cleaning effect of the indoor heat exchanger is improved, and the cleaning time is shortened, solving the technical problems of poor cleaning effect and long cleaning time of the indoor heat exchanger.

[0101] The common self-cleaning methods in the prior art are to control the system to make the evaporation temperature of the indoor heat exchanger or the outdoor heat exchanger reach a sub-zero temperature, so as to realize the phenomenon of condensed water frosting and expansion on the surface of the heat exchanger, and peel off the dust from the fins. When the frost reaches a certain degree, it is quickly defrosted so that the dust is discharged with the condensed water. However, the general common self-cleaning mode takes about 20 minutes to clean the heat exchanger, and the current self-cleaning mode is controlled by the system to try to produce more frost on the heat exchanger fins, and the dust on the fin surface is peeled off through the cold expansion frosting process of the condensed water. However, the above control method will cause the condensed water to peel off part of the dust and fluff when the first layer of frost is formed on the surface of the heat exchanger fins, but when the frost continues to form, it will frost on the outside of the first layer of frost, and it is actually unable to peel off the dust and fluff on the fin surface. Therefore, even if the frost is thicker, the cold expansion frost peeling effect is not achieved. The cleaning effect of the condensed water flow after the frost melts is actually very poor. It cannot wash away the dust and fluff adhering to the surface of the fins. It can only take away the dust and fluff that is peeled off due to cold expansion when the first layer of frost on the fins is formed.

[0102] Therefore, the air conditioner partition self-cleaning control method of this embodiment adjusts the opening of the electronic expansion valve, or / and controls the start and stop of the external fan, or / and whether the area to be cleaned is blocked, so that each area to be cleaned cycles m times of micro-frost and defrost, thereby achieving the effect of high-frequency micro-frost cold expansion to peel off the dust on the fin surface, and defrosting and rinsing to flush it away. The technical problem that the frost thickness in the traditional self-cleaning mode is very thick, but in fact only the first frost has the effect of cold expansion to peel off dust, and the subsequent frost cannot play the role of cold expansion frosting to peel off dust is solved.

[0103] In some embodiments of the present application, the frosting end condition is: the coil temperature of the area to be cleaned reaches the first temperature range; the defrosting end condition is: the coil temperature of the area to be cleaned reaches the second temperature range.

[0104] Among them, any value in the first temperature range is less than 0; and any value in the second temperature range is greater than 0.

[0105] When the coil temperature of the area to be cleaned reaches the first temperature range, it is determined that the shielded area to be cleaned reaches a slight frost state, the fin slight frost cold expansion is completed to remove dust, and then step S13 is executed.

[0106] When the coil temperature of the area to be cleaned reaches the second temperature range, it is determined that the area to be cleaned has completed defrosting.

[0107] Whether the frosting (micro-frost) and defrosting are completed is judged by the coil temperature of the area to be cleaned, and the speed block is switched in the frosting and defrosting stages, so that the area to be cleaned can be cleaned in a shorter time.

[0108] In some embodiments of the present application, the first temperature range is -5℃~-20℃. That is, when the coil temperature of the area to be cleaned is between -5℃~-20℃, it is determined that the area to be cleaned has completed frosting. Selecting the above temperature range can ensure that the surface of the area to be cleaned is frosted, while avoiding too thick frost and prolonging the cleaning time. As a preferred design scheme, the first temperature range is -5℃~-10℃.

[0109] In some embodiments of the present application, the second temperature range is 5°C to 20°C. That is, when the coil temperature of the area to be cleaned is between 5°C and 20°C, it is determined that the area to be cleaned has completed defrosting. Selecting the above temperature range can not only ensure that the surface of the area to be cleaned is defrosted, but also avoid prolonging the cleaning time. As a preferred design solution, the second temperature range is 5°C to 10°C.

[0110] In some other embodiments of the present application, the frosting end condition is: the time the area to be cleaned is blocked reaches a first set time; the defrosting end condition is: the defrosting time of the area to be cleaned reaches a second set time.

[0111] When the time period during which the area to be cleaned is blocked reaches a first set time period, it is determined that the blocked area to be cleaned reaches a slightly frosted state, the fins are slightly frosted and cold expanded to remove dust, and then step S13 is executed.

[0112] When the defrosting time of the area to be cleaned reaches the second set time, it is determined that the defrosting of the area to be cleaned is completed.

[0113] Whether frosting (micro-frost) and defrosting are completed is judged by the blocking time and defrosting time of the area to be cleaned, and the speed block is switched in the frosting and defrosting stages, so that the area to be cleaned can be cleaned in a shorter time.

[0114] In some other embodiments of the present application, the air conditioner further comprises a micro-current monitoring device and a DC power supply. The micro-current monitoring device is used to detect the current value and send the detected current value to the controller.

[0115] Two conductive terminals are arranged on the surface of each area to be cleaned of the indoor heat exchanger: a first conductive terminal c1 and a second conductive terminal c2. A micro-current monitoring device is used to detect the current value between the first conductive terminal c1 and the second conductive terminal c2. Fig.15 shown.

[0116] The first conductive terminal c1 is connected to a DC power source, and the second conductive terminal c2 is connected to a micro-current monitoring device. When the first conductive terminal c1 is connected to the second conductive terminal c2, the micro-current monitoring device detects the current value.

[0117] When the surface of the area to be cleaned is dry, the first conductive terminal c1 is not connected to the second conductive terminal c2, and the current value between the two is zero.

[0118] When frost forms on the surface of the area to be cleaned, since frost has a conductive effect, the first conductive terminal c1 and the second conductive terminal c2 are connected through the frost, and the current value monitored by the micro-current monitoring device is I1.

[0119] When there is condensation water on the surface of the area to be cleaned, since water has a strong conductive effect, the first conductive terminal c1 and the second conductive terminal c2 are connected through the water, and the current value monitored by the micro-current monitoring device is I2.

[0120] A first current threshold and a second current threshold are preset, and the first current threshold is less than the second current threshold. Since the resistance of frost is large, I1≤the first current threshold. Since the resistance of condensed water is small, I2≥the second current threshold.

[0121] According to the magnitude relationship between the current value between the first conductive terminal c1 and the second conductive terminal c2 and the first current threshold and the second current threshold, it is possible to directly monitor whether the surface of the area to be cleaned is in a state of slight frost or defrosting.

[0122] Therefore, in some embodiments of the present application, two conductive terminals are arranged at intervals on the surface of each area to be cleaned; the frosting end condition is: the current value between the two conductive terminals of the area to be cleaned is ∈(0, first current threshold]; the defrosting end condition is: the current value between the two conductive terminals of the area to be cleaned is greater than or equal to the second current threshold; wherein the first current threshold is less than the second current threshold.

[0123] When the current value between the two conductive terminals of the area to be cleaned is ∈(0, the first current threshold], it is determined that the shielded area to be cleaned reaches a slightly frosted state, the fins are slightly frosted and coldly expanded to remove dust, and then step S13 is executed.

[0124] When the current value between the two conductive terminals of the area to be cleaned is greater than or equal to the second current threshold, it is determined that the area to be cleaned has completed defrosting.

[0125] Whether the frosting (micro-frost) and defrosting are completed is judged by the current value between the two conductive terminals of the area to be cleaned. The speed block is switched between the frosting and defrosting stages, so that the area to be cleaned can be cleaned in a shorter time.

[0126] In some embodiments of the present application, the windward side of the indoor heat exchanger is divided into n areas to be cleaned from top to bottom; n≥2. In the partitioned self-cleaning mode, for each area to be cleaned on the windward side, m micro-frost rinsing processes are performed continuously from top to bottom (i.e., S11 to S15 are performed continuously m times), and the areas to be cleaned are cleaned in a short time by high-frequency frost stripping and defrosting rinsing to ensure the self-cleaning effect. That is, the upper area to be cleaned is cleaned first, and then the lower area to be cleaned is cleaned.

[0127] If the lower area to be cleaned is self-cleaned first, the cleaned area below may be contaminated when the upper area to be cleaned is self-cleaned. Therefore, the n areas to be cleaned are self-cleaned from top to bottom in turn to ensure the self-cleaning effect.

[0128] In some embodiments of the present application, in the partitioned self-cleaning mode, when the wind shield structure is activated, the speed of the internal fan is reduced.

[0129] When the wind shield structure includes a wind shield, the rotation speed of the internal fan is reduced during the rotation of the wind shield.

[0130] When the wind blocking structure includes a roller blind, the rotation speed of the internal fan is reduced during the process of unfolding or rolling up the roller blind.

[0131] In the zoned self-cleaning mode, since the internal fan is still running normally, it is easy for the wind shield structure to jam or make abnormal noises when the wind shield structure moves due to the excessive wind speed of the internal fan. Therefore, when the wind shield structure moves, the speed of the internal fan is reduced to avoid jamming, abnormal noise and other problems.

[0132] When cooling is in operation, the wind shielding structure blocks the area to be cleaned on the air inlet side of the indoor heat exchanger, and enters the zoned self-cleaning mode; since there is no air circulation in some areas on the air inlet side, the air outlet temperature of the indoor unit of the air conditioner changes sharply, which can easily lead to a poor user experience. In order to solve this problem, it is necessary to detect the air outlet temperature of the shell outlet.

[0133] In some embodiments of the present application, in order to avoid the bad experience caused by the rapid change of the air outlet temperature, the air conditioner partition self-cleaning control method also includes the following steps, see Figure 2 shown.

[0134] A temperature sensor is provided at the air outlet 11 of the housing to detect the air outlet temperature.

[0135] Step S21: obtaining the air outlet temperature T1 of the air outlet in the partitioned self-cleaning mode and the air outlet temperature T2 of the air outlet before entering the partitioned self-cleaning mode.

[0136] Step S22: when the outlet air temperature T1 is higher than the outlet air temperature T2, increase the opening of the electronic expansion valve, or / and increase the speed of the external fan, or / and increase the frequency of the compressor to reduce the outlet air temperature, so that the outlet air temperature in the partition self-cleaning mode is the same as the outlet air temperature before entering the partition self-cleaning mode.

[0137] By designing steps S21 to S22, the outlet air temperature is detected and compared. If the outlet air temperature rises, the outlet air temperature is dynamically adjusted by at least one of the three methods of increasing the opening of the electronic expansion valve, increasing the speed of the external fan, and increasing the frequency of the compressor. This makes the outlet air temperature in the zoned self-cleaning mode the same as the outlet air temperature in normal refrigeration operation, avoiding the adverse experience caused by the sudden change of the outlet air temperature due to entering the zoned self-cleaning mode.

[0138] In some other embodiments of the present application, the air conditioner partition self-cleaning control method further includes the following steps: Figure 3 shown.

[0139] Step S31: acquiring the coil temperature T3 of any area to be cleaned except the area to be cleaned currently being cleaned in the zoned self-cleaning mode, and the coil temperature T4 of the area before entering the zoned self-cleaning mode.

[0140] Step S32: When the coil temperature T3 is higher than the coil temperature T4, the opening of the electronic expansion valve is increased, or / and the speed of the external fan is increased, or / and the frequency of the compressor is increased to reduce the coil temperature, so that the coil temperature of the area to be cleaned that is not being cleaned in the zoned self-cleaning mode is the same as the coil temperature before entering the zoned self-cleaning mode.

[0141] That is, when one of the areas to be cleaned is undergoing self-cleaning, the coil temperature of any other area to be cleaned is detected in real time. If the current coil temperature is higher than the coil temperature of the area before entering the partitioned self-cleaning mode, the opening of the electronic expansion valve is increased, or / and, the speed of the external fan is increased, or / and, the frequency of the compressor is increased.

[0142] By designing steps S31 to S32, the coil temperature of the area to be cleaned that is not being cleaned is detected and compared. If the coil temperature rises, the coil temperature is dynamically adjusted by at least one of the three methods of increasing the opening of the electronic expansion valve, increasing the speed of the external fan, and increasing the frequency of the compressor to make it the same as the coil temperature during normal refrigeration operation, avoiding the adverse experience caused by the sudden change of the air outlet temperature due to entering the zoned self-cleaning mode.

[0143] When cooling is in operation, the wind shielding structure blocks the area to be cleaned on the air inlet side of the indoor heat exchanger, and enters the zoned self-cleaning mode; since there is no air circulation in some areas on the air inlet side, the air outlet speed at the air outlet of the indoor unit of the air conditioner changes sharply, which can easily lead to a poor user experience. Therefore, a wind speed detection device is set at the air outlet 11 to detect the air outlet speed.

[0144] In some other embodiments of the present application, the air conditioner partition self-cleaning control method further includes the following steps: Figure 4 shown.

[0145] Step S41: obtaining the air outlet velocity V1 in the partitioned self-cleaning mode and the air outlet velocity V0 before entering the partitioned self-cleaning mode.

[0146] Step S42: When the absolute value of the difference between the air outlet speed V1 and the air outlet speed V0 exceeds the set difference, adjust the internal fan speed so that the absolute value of the difference between the air outlet speed in the partitioned self-cleaning mode and the air outlet speed before entering the partitioned self-cleaning mode does not exceed the set difference.

[0147] By designing steps S41 to S42, when the air conditioner enters the zoned self-cleaning mode, the outlet wind speed is monitored in real time to obtain the outlet air speed, which is compared with the outlet air speed before entering the zoned self-cleaning mode. By compensating for the internal fan wind speed, the outlet wind speed is compensated to the wind speed before entering the self-cleaning mode, thereby avoiding the adverse experience caused by the sudden change of the outlet air speed due to entering the zoned self-cleaning mode.

[0148] For example, set the difference value to 0. When the air outlet speed V1 is higher than V0, reduce the speed of the internal fan. When the air outlet speed V1 is lower than V0, increase the speed of the internal fan.

[0149] In some embodiments of the present application, the windward side of the indoor heat exchanger is divided into n areas to be cleaned from top to bottom, and the indoor heat exchanger includes n flow paths arranged from top to bottom, and the n flow paths are connected in parallel; the n areas to be cleaned correspond to the n flow paths one by one. Each flow path corresponds to a region to be cleaned on the windward side.

[0150] When self-cleaning is performed on one of the areas to be cleaned, the wind shield structure only blocks the area to be cleaned, and the flow path corresponding to the area to be cleaned does not participate in the heat exchange. Since this flow path is connected in parallel with other flow paths, it will not affect the refrigerant temperature of other flow paths, thereby reducing the impact of self-cleaning on the user's cooling needs and avoiding affecting normal cooling.

[0151] For example, the windward side of the indoor heat exchanger is divided into three areas to be cleaned, and the indoor heat exchanger includes three parallel flow paths arranged from top to bottom, see Fig.13 As shown, the three areas to be cleaned correspond to the three flow paths one by one.

[0152] In some embodiments of the present application, the wind shield structure includes a wind shield, and the controller controls the wind shield to move to shield or expose any area to be cleaned on the windward side of the indoor heat exchanger.

[0153] When one of the areas to be cleaned on the windward side of the indoor heat exchanger needs to be shielded, the wind shield is controlled to move to shield the area to be cleaned.

[0154] When the windward side of the indoor heat exchanger does not need to be shielded, the wind shield is controlled to move to expose the windward side.

[0155] The wind shield is easy to install and fix in the air duct, is easy to move, has a simple structure and low cost.

[0156] In some other embodiments of the present application, the windward side of the indoor heat exchanger is divided into two areas to be cleaned: an upper area to be cleaned and a lower area to be cleaned. That is, n=2.

[0157] The wind shield structure includes a wind shield 50, which is rotatably arranged on the windward side of the indoor heat exchanger 30 to shield or expose the upper area to be cleaned or the lower area to be cleaned; see Figures 5 to 7 shown.

[0158] When it is not necessary to shield the upper and lower areas to be cleaned, the wind shield 50 is controlled to rotate so that the wind shield is parallel to the air outlet direction of the air outlet 21 of the internal fan 20. At this time, the upper and lower areas to be cleaned are exposed. Figure 5 shown.

[0159] When it is necessary to shield the upper area to be cleaned of the indoor heat exchanger 30, the wind shield 50 is controlled to rotate upward until the upper area to be cleaned is shielded. Figure 6 shown.

[0160] When it is necessary to shield the lower area to be cleaned of the indoor heat exchanger 30, the wind shield 50 is controlled to rotate downward until the lower area to be cleaned is shielded. Figure 7 shown.

[0161] The windshield 50 is rotatably connected to the rotating shaft 51. The controller drives the windshield 50 to rotate around the rotating shaft 51 through the driving motor to cover or expose the upper area to be cleaned or the lower area to be cleaned. The rotating shaft 51 is arranged in the air duct, and the rotating shaft 51 is located at the center of the windward side, dividing the windward side into the upper area to be cleaned and the lower area to be cleaned. The rotating shaft 51 is fixed to the inner wall of the housing 10 or the indoor heat exchanger 30.

[0162] When the upper area to be cleaned is self-cleaning, that is, when steps S11 to S15 are executed m times, the lower area to be cleaned can perform heat exchange normally, and the air conditioner can perform cooling.

[0163] When the lower area to be cleaned is self-cleaning, that is, when steps S11 to S15 are executed m times, the upper area to be cleaned can perform heat exchange normally, and the air conditioner can perform cooling.

[0164] Therefore, the air conditioner indoor unit of this embodiment first self-cleans the upper area to be cleaned, and uses the lower area to be cleaned for cooling; then self-cleans the lower area to be cleaned, and uses the upper area to be cleaned for cooling; this not only realizes the self-cleaning of the indoor heat exchanger, but also meets the user's cooling needs.

[0165] By dividing the windward side of the indoor heat exchanger into an upper area to be cleaned and a lower area to be cleaned, the indoor heat exchanger can be self-cleaned in different areas while ensuring the user's cooling needs. By setting a rotatable wind shield to shield or expose the upper area to be cleaned or the lower area to be cleaned, the structure is simple and easy to drive.

[0166] In normal cooling mode of the air conditioner, the wind shield does not block the windward side of the indoor heat exchanger. Figure 5 As shown in the figure, the windward side of the indoor heat exchanger is receiving air normally, and the air conditioner is cooling and supplying air normally.

[0167] In the zoned self-cleaning mode, the wind shield blocks part of the windward side of the indoor heat exchanger, such as the upper area to be cleaned. There is no air circulation and heat exchange in the blocked area, and the temperature drops rapidly to below 0 degrees, thereby achieving frost. In the area not blocked by the wind shield, such as the lower area to be cleaned, air flows in and out normally, so normal heat exchange can be achieved. When the upper area to be cleaned is frosted, the wind shield rotates to expose the upper area to be cleaned, so that the upper area to be cleaned can achieve normal heat exchange, and the temperature rises rapidly from below 0 degrees to achieve defrosting. Through the above process, the air conditioner can achieve cooling operation and self-cleaning of the indoor heat exchanger at the same time.

[0168] In the zoned self-cleaning mode, the upper area to be cleaned is first self-cleaned: the windshield 50 rotates upward to block the upper area to be cleaned, and the wind driven by the internal fan can only circulate through the lower area to be cleaned to achieve heat exchange; because there is no air circulation and heat exchange in the upper area to be cleaned, the evaporation temperature of the upper area to be cleaned drops rapidly, and condensed water is frosted. When the frosting end condition is met, the windshield can be controlled to rotate to expose the upper area to be cleaned, and the upper area to be cleaned can be defrosted quickly. When the defrosting end condition is met, it is determined that the upper area to be cleaned has completed defrosting.

[0169] Then, the lower area to be cleaned is self-cleaned: the windshield 50 rotates downward to block the lower area to be cleaned, and the wind driven by the internal fan can only circulate through the upper area to be cleaned to achieve heat exchange; because there is no air circulation and heat exchange in the lower area to be cleaned, the evaporation temperature of the lower area to be cleaned drops rapidly, and condensed water is frosted. When the frosting end condition is met, the windshield rotates to expose the lower area to be cleaned, and the lower area to be cleaned is defrosted quickly. When the defrosting end condition is met, it is determined that the lower area to be cleaned has completed defrosting.

[0170] The above method enables the air conditioner to enter the zoned self-cleaning mode during cooling, while realizing the self-cleaning control of the indoor heat exchanger and the cooling and air supply operation.

[0171] In some other embodiments of the present application, the windward side of the indoor heat exchanger is divided into n areas to be cleaned from top to bottom, where n≥2.

[0172] The windshield structure includes n telescopic windshields 60, which are arranged up and down, and the n telescopic windshields 60 correspond to the n areas to be cleaned one by one. The telescopic windshields 60 are arranged on one side (left or right) of the corresponding area to be cleaned, see Figure 8 The fixed end of the telescopic windshield plate 60 is fixed to the inner wall of the housing 10, and the telescopic end of the telescopic windshield plate 60 can extend to the other side of the area to be cleaned.

[0173] For example, the retractable wind shield 60 is arranged on the left side of the corresponding area to be cleaned and extends to the right to cover the corresponding area to be cleaned.

[0174] When there is no need to shield the area to be cleaned, the telescopic windshield corresponding to the area to be cleaned is controlled to retract to expose the area to be cleaned.

[0175] When the area to be cleaned needs to be shielded, the telescopic windshield corresponding to the area to be cleaned is controlled to extend to shield the area to be cleaned.

[0176] For example, the windward side of the indoor heat exchanger is divided into three areas to be cleaned from top to bottom, and the wind shielding structure includes three telescopic wind shielding plates 60 arranged up and down.

[0177] When there is no need to shield the windward side of the indoor heat exchanger, control the three retractable wind shields to retract to expose the windward side. Figure 8 shown.

[0178] When it is necessary to shield the uppermost area to be cleaned on the windward side of the indoor heat exchanger, the telescopic windshield corresponding to the area to be cleaned is controlled to extend to shield the area to be cleaned, see Fig. 9 shown.

[0179] The telescopic windshield plate is extended and retracted to shield or expose the corresponding area to be cleaned on the windward side, which is easy to control, simple in structure, low in cost, and easy to install and fix.

[0180] In some embodiments of the present application, the wind shielding structure includes a roller blind, and the controller controls the roller blind to unfold or roll up to block or expose any area to be cleaned on the windward side of the indoor heat exchanger. The roller blind is wound on a reel, and the controller sends a signal to the motor, which drives the rolling and unfolding of the roller blind through the motor.

[0181] When one of the areas to be cleaned on the windward side of the indoor heat exchanger needs to be shielded, the roller blind is controlled to unfold to shield the area to be cleaned.

[0182] When the windward side of the indoor heat exchanger does not need to be shielded, the roller blind is controlled to roll up to expose the windward side.

[0183] The rolling curtain can be unfolded or rolled up to cover or expose the area to be cleaned on the windward side, which has low cost, simple structure, easy installation and convenient control.

[0184] In some other embodiments of the present application, the windward side of the indoor heat exchanger is divided into n areas to be cleaned from top to bottom, where n≥2.

[0185] The wind shielding structure includes n rolling curtains 70 , and the n rolling curtains 70 correspond one-to-one to the n areas to be cleaned. The rolling curtains 70 are arranged above the corresponding areas to be cleaned.

[0186] When it is not necessary to shield the area to be cleaned, the roller blind 70 corresponding to the area to be cleaned is controlled to roll up to expose the area to be cleaned. Fig.10 shown.

[0187] When the area to be cleaned needs to be shielded, the rolling curtain corresponding to the area to be cleaned is controlled to unfold downward to shield the area to be cleaned.

[0188] For example, the windward side of the indoor heat exchanger is divided into two areas to be cleaned: an upper area to be cleaned and a lower area to be cleaned. The wind shielding structure includes two roller blinds 70, which correspond to the two areas to be cleaned one by one and are arranged above the corresponding areas to be cleaned.

[0189] When it is not necessary to shield the upper and lower areas to be cleaned, the two rolling curtains 70 are controlled to roll up to expose the upper and lower areas to be cleaned, see Fig.10 shown.

[0190] When the upper area to be cleaned needs to be shielded, the upper roller blind is controlled to unfold downward to shield the upper area to be cleaned. Fig.11 shown.

[0191] When the lower area to be cleaned needs to be shielded, the lower roller blind is controlled to unfold downward to shield the lower area to be cleaned. Fig.12 shown.

[0192] The rolling curtain 70 is wound on the reel 71 , and the controller sends a signal to the motor, which drives the rolling curtain 70 to be rolled up and unfolded.

[0193] Each rolling curtain is unfolded or rolled up to cover or expose the corresponding area to be cleaned, which is easy to control, simple in structure, low in cost, and easy to install and fix.

[0194] The roller blind is a flexible roller blind that is driven by a motor to unfold or roll up.

[0195] For example, the flexible rolling curtain is driven by a motor to unfold the flexible rolling curtain to cover the upper area to be cleaned on the windward side of the indoor heat exchanger, thereby shielding the upper area to be cleaned.

[0196] The flexible rolling curtain is driven by a motor to roll up the flexible rolling curtain so that the windward side of the indoor heat exchanger is not blocked.

[0197] In some further embodiments of the present application, the windward side of the indoor heat exchanger is divided into n areas to be cleaned from top to bottom, where n≥2.

[0198] The wind shield structure includes n horizontal rolling curtains 80, and the n horizontal rolling curtains 80 correspond to the n areas to be cleaned one by one. The horizontal rolling curtains 80 are arranged on one side (left side or right side) of the corresponding area to be cleaned. Fig.13 shown.

[0199] When there is no need to shield the area to be cleaned, the horizontal rolling curtain 80 corresponding to the area to be cleaned is controlled to roll up to expose the area to be cleaned, see Fig.13 shown.

[0200] When the area to be cleaned needs to be shielded, the horizontal rolling curtain 80 corresponding to the area to be cleaned is controlled to be horizontally unfolded to shield the area to be cleaned, see Fig.14 shown.

[0201] For example, the windward side of the indoor heat exchanger is divided into three areas to be cleaned from top to bottom: an upper area to be cleaned, a middle area to be cleaned, and a lower area to be cleaned, and the wind shielding structure includes three horizontal roller blinds 80 .

[0202] When there is no need to shield the windward side of the indoor heat exchanger, control the three horizontal roller blinds to roll up to expose the windward side. Fig.13 shown.

[0203] When it is necessary to shield the uppermost area to be cleaned on the windward side of the indoor heat exchanger, the horizontal roller blind corresponding to the area to be cleaned is controlled to be horizontally unfolded to shield the area to be cleaned, see Fig.14 shown.

[0204] The horizontal rolling curtain 80 is wound on the reel 81 , and the controller sends a signal to the motor, which drives the horizontal rolling curtain 80 to be rolled up and unfolded.

[0205] See also Fig.13 As shown, the indoor heat exchanger includes three flow paths: L1, L2, and L3. Each flow path has one inlet and one outlet. A horizontal roller blind 80 is correspondingly arranged next to each flow path.

[0206] See also Fig.13 As shown, when the air conditioner performs normal cooling, each horizontal rolling curtain 80 is rolled up on its own rolling shaft 81.

[0207] See also Fig.14 As shown, when the air conditioner enters the zoned self-cleaning mode, it first performs self-cleaning on the upper area to be cleaned on the windward side, and controls the top horizontal roller blind 80 to unfold to cover the upper area to be cleaned. Then, the top flow path L1 cannot be ventilated and heat exchanged, while flow paths L2 and L3 can be ventilated and heat exchanged normally to perform cooling and air supply operation; and the windward side of flow path L1 is covered and begins to frost. When the frosting end condition is met, the top horizontal roller blind is controlled to be rolled up, and flow path L1 is defrosted quickly because the air inlet is not blocked; when the defrosting end condition is met, the upper area to be cleaned completes defrosting. According to the above method, the middle area to be cleaned and the lower area to be cleaned are then self-cleaned in turn. After the zoned self-cleaning mode ends, the normal cooling and air supply mode is entered.

[0208] A temperature sensor is provided at the middle coil of each flow path to detect the coil temperature.

[0209] For example, a coil 32 is provided in the middle of the flow path L3, and a temperature sensor is inserted at the position of the coil to detect the temperature of the coil 32. Similarly, temperature sensors can be provided at the middle coils of the flow paths L1 and L2 to detect the temperature of the coils.

[0210] Embodiment 2

[0211] Based on the design of the air conditioner zone self-cleaning control method of the first embodiment, the second embodiment proposes an air conditioner that adopts the air conditioner zone self-cleaning control method.

[0212] The air conditioner of this embodiment divides the windward side of the indoor heat exchanger into a plurality of areas to be cleaned, and the wind shield structure is used to shield or expose any area to be cleaned; the air conditioner is controlled to enter the partitioned self-cleaning mode, and in the partitioned self-cleaning mode, m times of micro-frost rinsing process is performed for any area to be cleaned; the micro-frost rinsing process includes the following steps: the air conditioner is in cooling operation, the compressor is running, the external fan is rotating, the internal fan is rotating, the opening of the electronic expansion valve is set to the frosting opening, the wind shield structure is controlled to move to shield the area to be cleaned, and the area to be cleaned begins to frost; when the frosting end condition is met, the opening of the electronic expansion valve is controlled to increase to the set defrosting opening, or / and, The external fan is controlled to stop rotating, or / and, the wind shield structure is controlled to move to expose the area to be cleaned, and the area to be cleaned begins to defrost; when the defrosting end condition is met, it is determined that the area to be cleaned has completed defrosting; therefore, in the air conditioner partition self-cleaning control method of this embodiment, when a micro-frost rinsing process is performed on one of the areas to be cleaned, the remaining areas to be cleaned are not blocked, and heat can be exchanged normally to ensure the user's cooling needs, which not only realizes the self-cleaning of the area to be cleaned on the windward side of the indoor heat exchanger, but also does not affect the cooling, ensuring the user's cooling needs, solving the technical problem in the prior art that the indoor heat exchanger cannot meet the user's cooling needs during self-cleaning, and improving the user experience. Moreover, for any area to be cleaned, through m micro-frost rinsing processes, m frosting and defrosting processes are realized, that is, m micro-frost stripping and defrosting rinsing are realized, the cleaning effect of the indoor heat exchanger is improved, and the cleaning time is shortened, solving the technical problems of poor cleaning effect and long cleaning time of the indoor heat exchanger.

[0213] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the self-cleaning of an air conditioner by partition, characterized in that: The windward side of the indoor heat exchanger of the indoor unit of the air conditioner is divided into a plurality of areas to be cleaned; A wind shielding structure is provided in the air duct of the indoor unit of the air conditioner, for shielding or exposing any of the areas to be cleaned; The partition self-cleaning control method comprises: Controlling the air conditioner to enter a zoned self-cleaning mode, and in the zoned self-cleaning mode, performing m times of light frost rinsing process for any of the areas to be cleaned; m ≥ 2; The micro-frost rinsing process comprises the following steps: The air conditioner is in cooling operation, the compressor is running, the external fan is rotating, the internal fan is rotating, the opening of the electronic expansion valve is set to the frosting opening, the wind shielding structure is controlled to move to shield the area to be cleaned, and the area to be cleaned begins to frost; When the frosting end condition is met, the opening of the electronic expansion valve is controlled to increase to the set defrosting opening, or / and, the external fan is controlled to stop rotating, or / and, the wind shield structure is controlled to move to expose the area to be cleaned, and the area to be cleaned starts to defrost; When the defrosting end condition is met, determining that the area to be cleaned has completed defrosting; Among them, the set frosting opening is less than the set defrosting opening.

2. The air conditioner partition self-cleaning control method according to claim 1, characterized in that: The partition self-cleaning control method also includes: Obtain the air outlet temperature T1 of the air outlet in the partition self-cleaning mode and the air outlet temperature T2 of the air outlet before entering the partition self-cleaning mode; When the outlet air temperature T1 is higher than the outlet air temperature T2, the opening of the electronic expansion valve is increased, or / and the speed of the external fan is increased, or / and the frequency of the compressor is increased.

3. The air conditioner partition self-cleaning control method according to claim 1, characterized in that: The partition self-cleaning control method also includes: Obtaining the coil temperature T3 of any area to be cleaned except the area to be cleaned currently being cleaned in the zoned self-cleaning mode, and the coil temperature T4 of the area before entering the zoned self-cleaning mode; When the coil temperature T3 is higher than the coil temperature T4, the opening of the electronic expansion valve is increased, or / and the speed of the external fan is increased, or / and the frequency of the compressor is increased.

4. The air conditioner partition self-cleaning control method according to claim 1, characterized in that: The partition self-cleaning control method also includes: Obtain the outlet air velocity V1 in the partition self-cleaning mode and the outlet air velocity V0 before entering the partition self-cleaning mode; When the absolute value of the difference between the air outlet speed V1 and the air outlet speed V0 exceeds the set difference, the internal fan speed is adjusted so that the absolute value of the difference between the air outlet speed in the partitioned self-cleaning mode and the air outlet speed before entering the partitioned self-cleaning mode does not exceed the set difference.

5. The air conditioner partition self-cleaning control method according to claim 1, characterized in that: Two conductive terminals are arranged at intervals on the surface of each area to be cleaned; The frosting end condition is: the current value between the two conductive terminals of the area to be cleaned ∈ (0, first current threshold]; The defrosting end condition is: the current value between the two conductive terminals of the area to be cleaned is greater than or equal to a second current threshold; Wherein, the first current threshold is less than the second current threshold.

6. The air conditioner partition self-cleaning control method according to claim 1, characterized in that: The frosting end condition is: the coil temperature of the area to be cleaned reaches a first temperature range; The defrosting end condition is: the coil temperature of the area to be cleaned reaches the second temperature range; Among them, any value in the first temperature range is less than 0; and any value in the second temperature range is greater than 0.

7. The air conditioner partition self-cleaning control method according to claim 1, characterized in that: The frosting end condition is: the time duration of the area to be cleaned being blocked reaches a first set time duration; The defrosting end condition is: the defrosting time of the area to be cleaned reaches a second set time.

8. The air conditioner partition self-cleaning control method according to claim 1, characterized in that: In the zoned self-cleaning mode, the micro-frost rinsing process is continuously performed m times for each of the to-be-cleaned areas from top to bottom.

9. The air conditioner partition self-cleaning control method according to claim 1, characterized in that: In the partitioned self-cleaning mode, when the wind shielding structure is activated, the rotation speed of the internal fan is reduced.

10. An air conditioner, characterized in that: An air conditioner zone self-cleaning control method as claimed in any one of claims 1 to 9 is adopted.

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