Outdoor unit fan, outdoor unit, air conditioning unit and control method

Abstract

The invention provides an outdoor unit fan, an outdoor unit, an air conditioning unit and a control method. The outdoor unit fan comprises a fan motor and a rotating base arranged on an output shaft of the fan motor in a sleeving mode. The foldable fan blades are rotationally arranged on the rotating seat in a layered manner; and the controller is connected with the fan motor and used for judging whether a snow accumulation prevention mode needs to be started or not according to the outdoor environment information, and if yes, the multiple foldable fan blades are controlled to be arranged in an overlapped mode in the vertical direction so as to reduce the contact area for bearing rain and snow. According to the outdoor unit fan, the outdoor unit, the air conditioning unit and the control method, the technical problems that in the prior art, accumulated snow is accumulated on fan blades of a top air outlet air conditioning unit at the low temperature, traditional snow removing and anti-freezing measures affect air outlet, and especially the treatment effect is poor in the ultralow-temperature environment are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning equipment, and in particular to an outdoor fan, an outdoor unit, an air conditioning unit and a control method. Background Art

[0002] In existing top-discharge heat pump units, snow and ice easily accumulate on the blades in low-temperature environments. When the blades are under pressure from snow and ice for a long time, their structure is prone to deformation. This deformation can cause uneven rotation of the blades when the motor is running, resulting in rotation deviation. The accumulation of rotation deviation can easily cause motor overload or damage, further affecting the normal operation of the unit and even shortening the service life of the equipment.

[0003] In order to solve the problem of snow accumulation and ice on the fan blades, the traditional solution usually adopts the method of adding a hood to block the snow, or using the reverse cycle of the unit to achieve defrosting and deicing to deal with the ice on the fan blades. However, although installing a hood to prevent the snow from falling directly onto the surface of the fan blades can alleviate the snow accumulation problem to a certain extent, it also blocks the air outlet, resulting in a significant reduction in the air outlet efficiency of the unit; in addition, the installation of the hood may increase the manufacturing cost and structural complexity of the equipment; the reverse cycle defrosting and deicing operation, in an ultra-low temperature environment, not only takes a long time and has low efficiency, but also has poor defrosting and deicing effects.

[0004] Therefore, the prior art needs to be further developed. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide an outdoor unit fan, an outdoor unit, an air-conditioning unit and a control method to solve the technical problems in the related art that snow accumulates on the blades of the top-outlet air-conditioning unit at low temperatures, traditional snow removal and anti-freezing measures affect the air output, and the treatment effect is poor, especially in ultra-low temperature environments.

[0006] In order to achieve the above technical objectives, the present invention adopts the following technical solutions: an outdoor fan is provided, including: a fan motor and a rotating seat mounted on the output shaft of the fan motor; a plurality of foldable fan blades, which are arranged on the rotating seat for layered rotation; a controller, connected to the fan motor, for determining whether it is necessary to enter the anti-snow mode based on outdoor environmental information, and if so, controlling the plurality of foldable fan blades to overlap and arrange in a vertical direction to reduce the contact area for receiving rain and snow.

[0007] Furthermore, the rotating seat includes: multiple layers of fixed plates stacked on the fan motor output shaft from top to bottom; movable grooves arranged around the circumference of the fan motor output shaft are formed between adjacent fixed plates; and a foldable fan blade is slidably arranged in each layer of movable grooves.

[0008] Furthermore, it also includes multiple deployment limit pins and multiple folding limit pins, each deployment limit pin is evenly distributed in the movable groove along the circumferential direction of the rotating seat, and is used to limit the foldable fan blades in each layer of the movable groove to be evenly dispersed and arranged in the deployed state; each folding limit pin is respectively arranged in each movable groove, and the straight line on which the multiple folding limit pins are located is parallel to the rotation axis of the rotating seat, and the multiple folding limit pins are used to limit the foldable fan blades to be able to overlap and arrange in sequence in the vertical direction in the overlapping state; when the rotating seat rotates forward with the output shaft of the fan motor, the foldable fan blades slide in the movable groove until they contact the deployment limit pins, and the foldable fan blades stop sliding to remain in the deployed state; when the rotating seat rotates reversely with the output shaft of the fan motor, the foldable fan blades slide in the active groove in the reverse direction until they contact the folding limit pins, and the foldable fan blades stop sliding, so that all the foldable fan blades are overlapped and arranged in sequence in the vertical direction. Furthermore, the foldable fan blade includes a fixed shaft, an electric hinge assembly, and a folding leaf. One end of the fixed shaft is arranged in a movable groove and slides in the movable groove, and the other end is connected to the folding leaf through the electric hinge assembly. Furthermore, the electric hinge assembly includes: an articulation motor and a first articulation and a second articulation respectively mounted on the left and right sides of the output shaft of the articulation motor; the first articulation is fixedly connected to the fixed shaft, and the second articulation is fixedly connected to the folding leaf. The articulation motor drives the second articulation to rotate relative to the first articulation, thereby driving the folding leaf to bend relative to the fixed shaft, thereby further reducing the contact area for receiving rain and snow.

[0009] Furthermore, the unfolding limit pin and the folding limit pin have the same structure. Furthermore, each layer of the foldable fan blades is provided with copper contacts, and when all the layers of the foldable fan blades are folded, the copper contacts of two adjacent layers are in contact with each other. Furthermore, the copper contacts of the topmost layer of foldable blades are arranged on the lower surface of the foldable blades; the copper contacts of the bottommost layer of foldable blades are arranged on the upper surface of the foldable blades; and the copper contacts of the foldable blades of other layers are respectively arranged on the upper and lower surfaces of their respective foldable blades.

[0010] Furthermore, the copper contacts of all layers are arranged at the end of the foldable fan blade of the corresponding layer away from the output shaft of the fan motor. Furthermore, the foldable fan blade is made of metal material, and the surface of the foldable fan blade is coated with an insulating coating; a copper core conductor connected to the copper contact is arranged inside the foldable fan blade; and an AC power supply connected to the copper core conductor is arranged inside the rotating seat.

[0011] Furthermore, two adjacent layers of foldable fan blades form an electrical circuit through copper contacts, corresponding to an AC power supply and a control switch. Eddy current heating is achieved by forming an electrical circuit to remove ice and snow on the surface of the foldable fan blades. A voltage detector is connected to each electrical circuit, and the voltage detector is connected to the controller.

[0012] Furthermore, it also includes: a weight detection sensor, which is arranged on the foldable fan blade and is connected to the controller for detecting the weight of the foldable fan blade.

[0013] An outdoor unit comprises the outdoor unit fan as described above.

[0014] Furthermore, it also includes: an environmental sensor, which is arranged at the air outlet of the outdoor fan and is connected to the controller of the outdoor fan to detect outdoor environmental information.

[0015] An air conditioning unit comprises the outdoor unit as described above. Furthermore, the air conditioning unit is a heat pump unit.

[0016] A control method for an outdoor fan includes: obtaining outdoor environmental information; judging whether it is necessary to enter an anti-snow mode according to the outdoor environmental information, and if so, controlling foldable fan blades to overlap and arrange in a vertical direction.

[0017] Furthermore, obtaining outdoor environmental information includes obtaining outdoor temperature information and outdoor humidity information; the outdoor temperature information and outdoor humidity information include: temperature information and humidity information at the air outlet of the fan.

[0018] Further, based on the outdoor environment information, it is determined whether it is necessary to enter the anti-snow mode, including: if the temperature information shows that the outdoor temperature is less than or equal to a first threshold, and the humidity information shows that the outdoor humidity is greater than or equal to a second threshold, it is determined that it is necessary to enter the anti-snow mode.

[0019] Furthermore, the foldable fan blades are controlled to be arranged in an overlapping manner in the vertical direction, including: controlling the fan motor to reverse to drive the foldable fan blades in the movable groove to slide to the position where the folding limit pin is located; obtaining the voltage signal between two adjacent layers of foldable fan blades; if the voltage signal is displayed as zero, it is determined that the foldable fan blades of the corresponding layer have completed overlapping; if all voltage signals are displayed as zero, it is determined that all layers of the foldable fan blades have completed overlapping, the fan motor is controlled to stop rotating, and all layers of the foldable fan blades are controlled to bend.

[0020] Furthermore, before controlling all layers of foldable fan blades to bend, it also includes: detecting the weight of the current foldable fan blades; comparing whether the currently detected weight is greater than a preset value, and if so, determining that there is ice remaining on the foldable fan blades, turning on the control switch, and connecting the AC power supply; the preset value is related to the initial weight value of the foldable fan blades when leaving the factory.

[0021] Furthermore, controlling all layers of foldable fan blades to bend includes: first controlling the bottom layer of foldable fan blades to bend, and then controlling other layers of foldable fan blades to bend from bottom to top; or, controlling all layers of foldable fan blades to bend and fold at the same speed at the same time.

[0022] Furthermore, the bottom layer of foldable fan blades is first controlled to bend, and then the foldable fan blades of other layers are controlled to bend from bottom to top in sequence, specifically: first control the articulated motor of the bottom layer of foldable fan blades to rotate toward a first direction by a preset angle, or, to rotate toward the first direction for a preset time, and then control the articulated motors of other layers of foldable fan blades from bottom to top in sequence to perform the same action; all layers of foldable fan blades are controlled to bend and fold at the same speed at the same time, specifically: control the articulated motors of all layers of foldable fan blades to rotate toward the first direction by a preset angle, or, to rotate toward the first direction for a preset time at the same time and at the same frequency.

[0023] Furthermore, the preset angle is 90°; the preset duration is the standard duration used for the foldable fan blade to rotate from a horizontal state to a vertical state.

[0024] Furthermore, it also includes controlling all layers of foldable fan blades to recover from a bent state to an unfolded state when the unit receives a power-on command.

[0025] Furthermore, controlling all layers of foldable fan blades to restore from a bent state to a flat state includes: first controlling the articulated motor of the bottom layer of foldable fan blades to rotate toward a second direction by a preset angle, or, to rotate toward the second direction for a preset time, and then sequentially controlling the articulated motors of other layers of foldable fan blades from bottom to top to perform the same action; or, controlling the articulated motors of all layers of foldable fan blades to rotate toward the second direction by a preset angle, or, to rotate toward the second direction for a preset time at the same time and frequency; the second direction is opposite to the first direction.

[0026] Furthermore, it also includes: obtaining a voltage signal between two adjacent layers of foldable fan blades; if the voltage signal is not zero, it is determined that the foldable fan blades of the corresponding layer have completed resetting, and the foldable fan blades of the corresponding layer slide to the position where the unfolding limit pin is located; if all voltage signals are not zero, it is determined that all layers of foldable fan blades have completed resetting, and all layers of foldable fan blades are restored from the overlapping state to the unfolded state, and the fan motor is controlled to rotate forward to resume normal operation.

[0027] Beneficial effects: 1. After detecting the need to enter the anti-snow mode, the foldable blades arranged in an overlapping manner in the vertical direction of the outdoor unit fan of the present invention minimize the exposed area of ​​the blades and significantly reduce the pressure risk caused by the accumulation of rain and snow. After the blades are overlapped and bent, they are prevented from being deformed by the heavy pressure of rain and snow for a long time, thereby improving the durability of the blades and the motor.

[0028] 2. The multi-layer fixed plate and movable groove structure on the outdoor unit fan rotating seat of the present invention, combined with the limit pin, ensure that the fan blades can operate reliably and occupy little space when unfolded, overlapped and bent; the fan blades are overlapped first and then bent, which not only reduces the occupied space but also further prevents rain and snow from adhering.

[0029] 3. The air-conditioning unit of the present invention controls the overlapping arrangement of the fan blades to ensure that the fan blades stop being stressed in the anti-snow mode, prevents motor overload or damage due to rotation deviation, and ensures the operating stability of the unit; the overlapping and bent fan blades automatically return to the expanded state after receiving the reset command, ensuring that the air outlet efficiency of the unit under normal working conditions will not be affected.

[0030] 4. The foldable fan blades have built-in copper contacts and copper core conductors, which form an electrical circuit to achieve eddy current heating, effectively removing ice and snow from the surface of the fan blades, and are particularly suitable for ultra-low temperature environments.

[0031] 5. The environmental sensor combined with the controller automatically determines whether to enter the anti-snow mode according to the outdoor temperature and humidity information, without human intervention, and can adapt to complex weather conditions; the voltage detector, weight sensor, etc. are used to accurately monitor the overlapping and bending status of the wind blades to ensure the reliability of the action sequence and effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a schematic structural diagram of an outdoor fan in an embodiment of the present invention with its blades in an unfolded state; Figure 2 is a schematic structural diagram of an outdoor fan in an overlapping state of fan blades used in an embodiment of the present invention; Figure 3 This is a front view of the outdoor fan in an embodiment of the present invention with its blades in an overlapping state; Figure 4 It is a front view of a rotating seat of an outdoor unit fan used in an embodiment of the present invention; Figure 5 is a rear view of a rotating seat of an outdoor unit fan used in an embodiment of the present invention; Figure 6 yes Figure 3 A top view of the outdoor fan blades in an overlapping state in the embodiment; Figure 7 yes Figure 3 A bottom view of the outdoor fan in the embodiment with the blades of the fan overlapping; Figure 8 yes Figure 3 A top view of the fixed shaft and the electric hinge assembly of the outdoor unit fan in the embodiment in which the fan blades are overlapped; Fig. 9 yes Figure 3 A bottom view of the fixed shaft and the electric hinge assembly of the outdoor unit fan in the embodiment in the overlapping state of the fan blades; Fig.10 yes Figure 3 A front view of the fan blades of the outdoor unit fan used in the embodiment of the invention being overlapped and bent; Fig.11 It is a flow chart of the control method adopted in the embodiment of the present invention.

[0033] The above drawings include the following reference numerals: 1. Fan frame; 11. Fan motor output shaft; 2. Rotating seat; 21. Fixed plate; 22. Movable slot; 231. Expanding limit pin; 232. Folding limit pin; 3. Foldable fan blade; 31. Fixed shaft; 32. Electric hinge assembly; 321. First hinge; 322. Second hinge; 33. Folding blade; 41. Copper contact; 5. Weight detection sensor. DETAILED DESCRIPTION In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0034] According to an embodiment of the present invention, an outdoor fan is provided. Figures 1 to 11 , including: a fan motor and a rotating base 2 mounted on the fan motor output shaft 11; a plurality of foldable fan blades 3, which are arranged on the rotating base 2 for layered rotation; a controller, connected to the fan motor, for judging whether it is necessary to enter the anti-snow accumulation mode according to the outdoor environmental information, and if so, controlling the plurality of foldable fan blades 3 to overlap in the vertical direction to reduce the contact area for receiving rain and snow. The fan blade movement is dynamically controlled according to the environmental information, and the foldable fan blades 3 are overlapped in the vertical direction, which effectively reduces the risk of rain and snow accumulation and prevents deformation or damage due to long-term pressure on the fan blades. The outdoor fan of this embodiment solves the technical problems in the related art that the fan blades of the top-out air-conditioning unit accumulate snow at low temperatures, and the traditional snow removal and anti-freezing measures affect the air output, especially in ultra-low temperature environments, and the processing effect is poor.

[0035] See also Figure 1 , Figure 2 and Figure 3 The outdoor fan of this embodiment includes a rotating seat 2 comprising: a plurality of fixed plates 21 which are sequentially overlapped on the fan motor output shaft 11 from top to bottom; a movable groove 22 arranged around the circumference of the fan motor output shaft 11 is formed between adjacent fixed plates 21; and a foldable fan blade 3 is slidably arranged in each layer of movable groove 22. The plurality of fixed plates 21 are arranged at intervals to form the movable groove 22 for the fan blade to slide, and the fan blade can be smoothly switched between unfolding and overlapping by sliding the movable groove 22, and the action reliability is strong.

[0036] See also Figure 3 , Figure 4 and Figure 5 The outdoor fan of this embodiment further includes a plurality of unfolding limit pins 231 and a plurality of folding limit pins 232. Each unfolding limit pin 231 is evenly distributed in the movable groove 22 along the circumferential direction of the rotating seat 2, and is used to limit the foldable fan blades 3 in each layer of the movable groove 22 to be evenly dispersed in the unfolded state; each folding limit pin 232 is respectively arranged in each movable groove 22, and the straight line where the plurality of folding limit pins 232 are located is parallel to the rotation axis of the rotating seat 2. The plurality of folding limit pins 232 are used to limit the foldable fan blades 3 can be arranged in overlapping order in the vertical direction in the overlapping state; when the rotating seat 2 rotates forward with the fan motor output shaft 11, the foldable fan blades 3 slide in the movable groove 22 until they contact the unfolding limit pin 231, and the foldable fan blades 3 stop sliding to remain in the unfolded state; when the rotating seat 2 rotates reversely with the fan motor output shaft 11, the foldable fan blades 3 slide reversely in the movable groove 22 until they contact the folding limit pin 232, and the foldable fan blades 3 stop sliding, so that all the foldable fan blades 3 are arranged in overlapping order in the vertical direction. The pins provide limit support for the unfolded and overlapping states respectively to prevent the fan blades from sliding too far. Figure 4 and Figure 5 As shown, an expansion limit pin 231 and a folding limit pin 232 are provided in each movable groove 22. When the motor rotates forward, the fan blade is driven until it slides to the expansion limit pin 231, and the fan blade is prevented from further moving by the resistance of the expansion limit pin 231, thereby positioning the fan blade; when the motor rotates reversely, the fan blade moves in the opposite direction in the movable groove 22 until it slides to the folding limit pin 232, and the fan blade is prevented from further moving by the resistance of the folding limit pin 232, thereby positioning the fan blade.

[0037] In this embodiment, there is only one latch in one layer of the movable groove 22, and the latch can be used as a limiter when the fan blade is in the unfolded state, and can also be used as a limiter when the fan blade is in the folded state. Figure 5 As shown, the folding limit pin 232 forms a straight line along the vertical direction, wherein the other side of the folding limit pin 232 in the first layer movable groove 22 is provided with an unfolding limit pin 231 (that is, Figure 4 The first layer of movable groove 22 is shown in the perspective, the folding limit pin 232 in the second layer of movable groove 22 is provided with an unfolding limit pin 231 at the three o'clock direction, and the pin in the third layer of movable groove 22 can be used as a limiter when the fan blade is unfolded, and can also be used as a limiter when the fan blade is folded. The folding limit pin 232 in the fourth layer of movable groove 22 is provided with an unfolding limit pin 231 at the nine o'clock direction. With this design, when the four fan blades are unfolded, the fan blades are respectively limited by the unfolding limit pins 231 in the four directions of the southeast, northwest, and northeast of the rotating seat 2 (such as Figure 1 When the four blades overlap, the four blades are respectively limited by the folding limit pins 232 located on the same straight line (as shown); Figure 2 and Figure 3 as shown).

[0038] See also Figure 3 , Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 In the outdoor fan of this embodiment, the foldable fan blade includes a fixed shaft 31, an electric hinge assembly 32, and a folding blade 33. One end of the fixed shaft 31 is arranged in the movable groove 22 and slides in the movable groove 22, and the other end is connected to the folding blade 33 through the electric hinge assembly 32. The folding blade 33 is further bent on the basis of the overlapping state to minimize the exposed area and improve the snow and frost protection effect.

[0039] See also Figure 6 , Figure 7 , Figure 8 , Fig. 9 and Fig.10 In the outdoor fan of this embodiment, the lengths of the fixed shafts 31 of the four blades are different. When all the blades overlap in the vertical direction, the hinges 33 can be staggered in sequence to form a staggered structure to prevent the hinges 33 from interfering with each other when the blades are bent. In order to ensure that the four blades can maintain balance during rotation, the fixed shaft 31, the electric hinge assembly 32 and the hinge 33 of each blade have the same mass.

[0040] See also Figure 6 and Figure 7In the outdoor fan of this embodiment, the electric hinge assembly 32 includes: an articulated motor and a first hinge 321 and a second hinge 322 respectively mounted on the left and right sides of the output shaft of the articulated motor; the first hinge 321 is fixedly connected to the fixed shaft 31, and the second hinge 322 is fixedly connected to the hinge 33. The second hinge 322 is driven by the articulated motor to rotate relative to the first hinge 321, driving the hinge 33 to bend relative to the fixed shaft 31, thereby further reducing the contact area for receiving rain and snow. The electric hinge is not limited to the structure of this embodiment, as long as the second hinge 322 can be rotated relative to the first hinge 321, the articulated motor ensures the controllability of the bending angle and duration, and improves the adaptability and accuracy of the equipment.

[0041] See also Figure 4 and Figure 5 In the outdoor fan of this embodiment, the expansion limit pin 231 and the folding limit pin 232 have the same structure. The expansion limit pin 231 and the folding limit pin 232 are protrusions arranged in the movable groove 22. When the fixed shaft 31 slides to the position of the corresponding pin, the fixed shaft 31 is blocked by the pin, thereby stopping further sliding.

[0042] See also Figure 1 and Figure 2 In the outdoor fan of this embodiment, each layer of foldable blades 3 is provided with a copper contact 41. When all layers of foldable blades 3 are folded, the copper contacts 41 of two adjacent layers are in contact with each other. The copper contacts 41 form a stable circuit in the folded state, providing the necessary conditions for the deicing function. In the outdoor fan of the present embodiment, the copper contacts 41 of the topmost layer of foldable blades 3 are arranged on the lower surface of the foldable blades 3; the copper contacts 41 of the bottommost layer of foldable blades 3 are arranged on the upper surface of the foldable blades 3; and the copper contacts 41 of the foldable blades 3 of other layers are respectively arranged on the upper surface and the lower surface of each foldable blade 3.

[0043] See also Figure 1 and Figure 2 In the outdoor fan of this embodiment, the copper contacts 41 of all layers are arranged at the end of the corresponding layer of foldable blades 3 away from the output shaft 11 of the fan motor. In the outdoor fan of this embodiment, the foldable fan blades 3 are made of metal material, and the surface of the foldable fan blades 3 is coated with an insulating coating; a copper core conductor connected to the copper contact 41 is arranged inside the foldable fan blades 3; and an AC power supply connected to the copper core conductor is arranged inside the rotating seat 2.

[0044] In the outdoor fan of this embodiment, two adjacent layers of foldable blades 3 form an electrical circuit through copper contacts 41, corresponding to an AC power supply and a control switch, to remove ice and snow on the surface of the foldable blades 3; a voltage detector is connected to each electrical circuit, and the voltage detector is connected to the controller.

[0045] See also Fig.10 The outdoor fan of this embodiment further includes: a weight detection sensor 5, which is arranged on the foldable fan blade 3, and the weight detection sensor 5 is connected to the controller for detecting the weight of the foldable fan blade 3. The weight detection sensor 5 is arranged at the end of the folding blade 33.

[0046] The outdoor unit of this embodiment includes the outdoor fan as described above, and further includes: an environmental sensor, which is arranged at the air outlet of the outdoor fan and connected to the controller of the outdoor fan for detecting outdoor environmental information.

[0047] The air conditioning unit of this embodiment is a heat pump unit, and includes the outdoor unit as described above. See also Fig.11 The control method of the outdoor fan of this embodiment includes: obtaining outdoor environmental information; judging whether it is necessary to enter the anti-snow mode according to the outdoor environmental information, and if so, controlling the foldable fan blades 3 to overlap and arrange in a vertical direction.

[0048] The control method of this embodiment obtains outdoor environmental information, including obtaining outdoor temperature information and outdoor humidity information; the outdoor temperature information and outdoor humidity information include: temperature information and humidity information at the air outlet of the fan.

[0049] The control method of this embodiment obtains outdoor environmental information, including obtaining outdoor temperature information or outdoor humidity information; the outdoor temperature information or outdoor humidity information includes: temperature information or humidity information at the air outlet of the fan.

[0050] The control method of this embodiment determines whether it is necessary to enter the anti-snow mode based on outdoor environmental information, including: if the temperature information shows that the outdoor temperature is less than or equal to a first threshold, and the humidity information shows that the outdoor humidity is greater than or equal to a second threshold, it is determined that it is necessary to enter the anti-snow mode.

[0051] See also Fig.11The control method of this embodiment controls the foldable blades 3 to be arranged in an overlapping manner in the vertical direction, including: controlling the fan motor to reverse to drive the foldable blades 3 in the movable slot 22 to slide to the position where the folding limit pin 232 is located; obtaining the voltage signal between two adjacent layers of foldable blades 3; if the voltage signal is displayed as zero, it is determined that the foldable blades 3 of the corresponding layer have completed overlapping; if all voltage signals are displayed as zero, it is determined that all layers of foldable blades 3 have completed overlapping, controlling the fan motor to stop rotating, and controlling all layers of foldable blades 3 to bend. The voltage signal clearly indicates whether the blades are overlapped in place to ensure accurate action. Combined with sliding and overlapping actions, it quickly enters the snow protection state to improve protection efficiency.

[0052] The control method of this embodiment, before controlling all layers of foldable fan blades 3 to bend, also includes: detecting the weight of the current foldable fan blades 3; comparing whether the currently detected weight is greater than a preset value, if so, determining that ice remains on the foldable fan blades 3, turning on the control switch, connecting the AC power supply, heating the fan blades to melt ice and snow; when the weight detection sensor 5 detects that the fan blades are equal to the preset value, the control switch is closed. The preset value is related to the initial weight value of the foldable fan blades 3 when they leave the factory. Real-time feedback of the weight change of the fan blades is provided to accurately trigger the deicing function.

[0053] The control method of this embodiment controls all layers of foldable blades 3 to bend, including: first controlling the bottom layer of foldable blades 3 to bend, and then controlling other layers of foldable blades 3 to bend from bottom to top; or controlling all layers of foldable blades 3 to bend and fold at the same speed at the same time. The blades are controlled to bend after overlapping, and the bending action further reduces the accumulation of snow and rain.

[0054] The control method of this embodiment first controls the bottom layer of foldable fan blades 3 to bend, and then controls the foldable fan blades 3 of other layers to bend from bottom to top in sequence, specifically: first control the articulated motor of the bottom layer of foldable fan blades to rotate toward a first direction by a preset angle, or, to rotate toward the first direction for a preset time, and then control the articulated motors of other layers of foldable fan blades 3 from bottom to top in sequence to perform the same action; control all layers of foldable fan blades 3 to bend and fold at the same speed at the same time, specifically: control the articulated motors of all layers of foldable fan blades 3 to rotate toward the first direction by a preset angle at the same time and at the same frequency, or, to rotate toward the first direction for a preset time.

[0055] In the control method of this embodiment, the preset angle is 90°; the preset time is the standard time taken for the foldable fan blade 3 to rotate from a horizontal state to a vertical state.

[0056] The control method of this embodiment further includes controlling all layers of the foldable fan blades 3 to restore from a bent state to an unfolded state when the unit receives a power-on instruction.

[0057] The control method of the present embodiment controls all layers of the foldable fan blades 3 to restore from a bent state to a flat state, comprising: first controlling the articulated motor of the bottom layer of the foldable fan blades 3 to rotate toward a second direction by a preset angle, or, to rotate toward the second direction for a preset time, and then sequentially controlling the articulated motors of other layers of the foldable fan blades 3 from bottom to top to perform the same action; or, controlling the articulated motors of all layers of the foldable fan blades 3 to rotate toward the second direction by a preset angle at the same time and frequency, or, to rotate toward the second direction for a preset time; the second direction is opposite to the first direction.

[0058] The control method of this embodiment also includes: obtaining a voltage signal between two adjacent layers of foldable fan blades 3; if the voltage signal is not zero, it is determined that the foldable fan blades 3 of the corresponding layer have completed resetting, and the foldable fan blades 3 of the corresponding layer slide to the position where the unfolding limit pin 231 is located; if all voltage signals are not zero, it is determined that all layers of foldable fan blades 3 have completed resetting, and all layers of foldable fan blades 3 are restored from the overlapping state to the unfolded state, and the fan motor is controlled to rotate forward to resume normal operation.

[0059] The control method of this embodiment, when the unit is on standby, first reads the outlet temperature T1 and humidity H1. When the temperature T1≤0℃ and the humidity H1≥50%, it is judged that there is a risk of ice and snow accumulation. At this time, the fan motor is controlled to reverse, and the rotating seat 2 rotates at a specific speed. Because of the restriction of the movable groove 22 and the inertia of the fan blades, the fan blades gradually begin to overlap. At this time, according to the data V1 read from the voltage detector, when V1=0, it is judged that the fan blades have completed overlapping, and the folding limit pin 232 clamps the fan blades. When the voltage between all the fan blades is 0, the fan motor stops rotating. Secondly, the weight of the fan blade is detected, and the mass M1 at this time is compared with the initial fan blade mass M. When M1>M, it means that there is residual ice on the fan blade. At this time, the AC power supply is connected and turned on, and eddy currents begin to generate on the surface of the fan blade, thereby generating heat to melt the ice and snow on the surface of the fan blade. Next, the built-in small motor on the control hinge is operated to slowly bend the fan blade downward. According to the pre-test, the fan blade reaches the predetermined position. The predetermined position of this scheme is vertically downward. The time used by the motor to work is t seconds. The motor only needs to work for t seconds and then stop running to ensure that the fan blade completes the required bending. Because the fan blade is vertically downward, snow, rainwater, etc. will not accumulate on the fan blade. When the unit receives the start-up command: the built-in small motor near the control hinge is reversed. The motor only needs to work for t seconds and then stop running, and the fan blade returns to normal working state. When the fan blade is reset, the fan motor starts to rotate forward. At this time, the fan blade is dispersed to the specified position under the action of inertia. At this time, according to the data V1 read from the voltage detector, when V1≠0, it is judged that the fan blade has completed dispersion. At this time, the fan motor stops rotating, and the limit pin 231 is unfolded to clamp the fan blade to ensure the normal operation of the fan blade.

[0060] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0061] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments, and this embodiment will not be described in detail here.

[0062] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0063] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0064] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An outdoor fan, characterized in that: include: A fan motor and a rotating seat sleeved on the output shaft of the fan motor; A plurality of foldable fan blades are rotatably arranged on the rotating seat in layers; The controller is connected to the fan motor and is used to determine whether it is necessary to enter the anti-snow mode based on outdoor environmental information. If so, the controller controls the multiple foldable blades to overlap in the vertical direction to reduce the contact area for receiving rain and snow.

2. The outdoor fan according to claim 1, characterized in that: The rotating seat comprises: A plurality of fixing plates are sequentially sleeved on the output shaft of the fan motor from top to bottom; A movable groove arranged around the circumference of the fan motor output shaft is formed between adjacent fixing plates; A foldable fan blade is slidably arranged in each layer of the movable groove.

3. The outdoor fan according to claim 2, characterized in that: It also includes a plurality of unfolding limit pins and a plurality of folding limit pins, wherein each of the unfolding limit pins is evenly spaced in the movable groove along the circumferential direction of the rotating seat, and is used to limit the foldable fan blades in each layer of the movable groove to be evenly dispersed and arranged in an unfolded state; each of the folding limit pins is respectively arranged in each of the movable grooves, and the straight line where the plurality of folding limit pins are located is parallel to the rotation axis of the rotating seat, and the plurality of folding limit pins are used to limit the foldable fan blades to be arranged in an overlapping manner in the vertical direction in an overlapping state; When the rotating seat rotates forwardly with the output shaft of the fan motor, the foldable blades slide in the movable grooves until they come into contact with the unfolding limit pins, and the foldable blades stop sliding to remain in the unfolded state; when the rotating seat rotates reversely with the output shaft of the fan motor, the foldable blades slide reversely in the movable grooves until they come into contact with the folding limit pins, and the foldable blades stop sliding, so that all the foldable blades are arranged in sequence and overlap in the vertical direction.

4. The outdoor fan according to claim 3, characterized in that: The foldable fan blade comprises a fixed shaft, an electric hinge assembly, and a folding leaf. One end of the fixed shaft is arranged in the movable groove and slides in the movable groove, and the other end is connected to the folding leaf through the electric hinge assembly.

5. The outdoor fan according to claim 4, characterized in that: The electric hinge assembly includes: an articulated motor and a first articulated member and a second articulated member respectively mounted on the left and right sides of an output shaft of the articulated motor; the first articulated member is fixedly connected to the fixed shaft, and the second articulated member is fixedly connected to the folding leaf, and the articulated motor drives the second articulated member to rotate relative to the first articulated member, thereby driving the folding leaf to bend relative to the fixed shaft, thereby further reducing the contact area for receiving rain and snow.

6. The outdoor fan according to claim 3, characterized in that: The unfolding limit pin and the folding limit pin have the same structure.

7. The outdoor fan according to any one of claims 1 to 6, characterized in that: Copper contacts are arranged on each layer of the foldable fan blades. When all layers of the foldable fan blades are folded, the copper contacts of two adjacent layers are in contact with each other.

8. The outdoor fan according to claim 7, characterized in that: The copper contact of the uppermost foldable fan blade is arranged on the lower surface of the foldable fan blade; The copper contact of the bottommost foldable fan blade is arranged on the upper surface of the foldable fan blade; The copper contacts of the foldable fan blades of other layers are respectively arranged on the upper surface and the lower surface of the respective foldable fan blades.

9. The outdoor fan according to claim 7, characterized in that: The copper contacts of all layers are arranged at one end of the foldable fan blade of the corresponding layer away from the output shaft of the fan motor.

10. The outdoor fan according to claim 7, characterized in that: The foldable fan blade is made of metal material, and the surface of the foldable fan blade is coated with an insulating coating; a copper core conductor connected to the copper contact is arranged inside the foldable fan blade; An alternating current power source connected to the copper core conductor is arranged in the rotating seat.

11. The outdoor fan according to claim 7, characterized in that: The foldable fan blades of two adjacent layers form an electrical circuit through the copper contacts, corresponding to an AC power supply and a control switch, and eddy current heating is achieved by forming an electrical circuit to remove ice and snow on the surface of the foldable fan blades; Each power circuit is connected with a voltage detector, and the voltage detector is connected with the controller.

12. The outdoor fan according to claim 7, characterized in that: Also includes: A weight detection sensor is provided on the foldable fan blade, and the weight detection sensor is connected to the controller and is used for detecting the weight of the foldable fan blade.

13. An outdoor unit, characterized in that: It comprises the outdoor unit fan as described in any one of claims 1-12.

14. The outdoor unit according to claim 13, characterized in that: Also includes: The environmental sensor is arranged at the air outlet of the outdoor fan and is connected to the controller of the outdoor fan to detect outdoor environmental information.

15. An air conditioning unit, characterized in that: Includes the outdoor unit according to claim 13 or 14.

16. The air conditioning unit according to claim 15, characterized in that: The air conditioning unit is a heat pump unit.

17. A method for controlling an outdoor fan, characterized in that: include: Obtain outdoor environment information; According to the outdoor environment information, it is determined whether it is necessary to enter the anti-snow mode, and if so, the foldable blades are controlled to be arranged in an overlapping manner in the vertical direction.

18. The control method according to claim 17, characterized in that: The obtaining of outdoor environment information includes: Obtaining outdoor temperature information and / or outdoor humidity information; The outdoor temperature information and / or outdoor humidity information include: temperature information and / or humidity information at the air outlet of the fan.

19. The control method according to claim 18, characterized in that: The step of determining whether to enter the anti-snow mode according to the outdoor environment information includes: If the temperature information shows that the outdoor temperature is less than or equal to the first threshold, and the humidity information shows that the outdoor humidity is greater than or equal to the second threshold, it is determined that the anti-snow mode needs to be entered.

20. The control method according to claim 17, characterized in that: The controlling the foldable blades to be arranged in an overlapping manner in a vertical direction comprises: Controlling the fan motor to rotate in reverse to drive the foldable fan blade in the movable slot to slide to the position where the folding limit pin is located; Acquiring a voltage signal between two adjacent layers of the foldable wind blades; If the voltage signal is zero, it is determined that the foldable blades of the corresponding layer have completed overlapping; If all voltage signals are displayed as zero, it is determined that all layers of the foldable blades have completed overlapping, the fan motor is controlled to stop rotating, and all layers of the foldable blades are controlled to bend.

21. The control method according to claim 20, characterized in that: Before controlling all layers of foldable wind blades to bend, the method further comprises: Detecting the weight of the foldable fan blade; Compare whether the currently detected weight is greater than a preset value. If so, determine that there is ice remaining on the foldable fan blade, turn on the control switch, and connect the AC power supply; the preset value is related to the initial weight value of the foldable fan blade when it leaves the factory.

22. The control method according to claim 21, characterized in that: The controlling of all layers of foldable wind blades to bend comprises: First, the bottom layer of foldable fan blades are controlled to bend, and then the other layers of foldable fan blades are controlled to bend from bottom to top in sequence; or, All layers of foldable wind blades are controlled to bend and fold at the same speed.

23. The control method according to claim 22, characterized in that: The method first controls the bottommost foldable fan blade to bend, and then sequentially controls the foldable fan blades of other layers to bend from bottom to top, specifically: First, the articulated motor of the foldable fan blades at the bottom layer is controlled to rotate in a first direction by a preset angle, or in a first direction for a preset time, and then the articulated motors of the foldable fan blades at other layers are controlled from bottom to top to perform the same action; The method of controlling all layers of foldable wind blades to bend and fold at the same speed simultaneously is specifically as follows: The articulated motors controlling all layers of foldable fan blades are rotated toward a first direction at a preset angle and at the same frequency at the same time, or are rotated toward the first direction for a preset time period.

24. The control method according to claim 23, characterized in that: The preset angle is 90°; The preset duration is the standard duration used for the foldable fan blade to rotate from a horizontal state to a vertical state.

25. The control method according to any one of claims 23 or 24, characterized in that: It also includes controlling all layers of foldable fan blades to return from a folded state to a flat state when the unit receives a power-on command.

26. The control method according to claim 25, characterized in that: The method of controlling all layers of foldable wind blades to return from a bent state to a flat state comprises: First, the articulated motor of the bottom foldable fan blade is controlled to rotate toward the second direction by a preset angle, or rotate toward the second direction for a preset time, and then the articulated motors of the other layers of foldable fan blades are controlled from bottom to top to perform the same action; or, Controlling the articulated motors of all layers of foldable fan blades to rotate in a second direction at a preset angle at the same frequency, or to rotate in the second direction for a preset time; The second direction is opposite to the first direction.

27. The control method according to claim 25, characterized in that: Also includes: Acquire a voltage signal between two adjacent layers of foldable wind blades; If the voltage signal is not zero, it is determined that the foldable fan blades of the corresponding layer have completed resetting, and the foldable fan blades of the corresponding layer slide to the position where the unfolding limit pin is located; If all voltage signals are displayed as non-zero, it is determined that all layers of foldable fan blades have completed resetting, and all layers of foldable fan blades are restored from the overlapping state to the unfolded state, and the fan motor is controlled to rotate forward to resume normal operation.

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