Deicing device, axial flow fan and air conditioning system

Abstract

The invention discloses a deicing device, an axial flow fan and an air conditioning system, and the deicing device comprises a supporting shell which is provided with a through hole in the axial direction; the supporting shell is used for being independently assembled on a fan cover of the axial flow fan. The protective cover covers the supporting shell, and an annular air inlet channel is formed between the supporting shell and the protective cover; a through hole is formed in the supporting shell, the mounting plate is covered with the supporting shell, the mounting plate is provided with an air draft assembly corresponding to the through hole, and an annular air outlet channel is formed between the supporting shell and the mounting plate; the heating assembly is arranged in the supporting shell in the circumferential direction of the end, away from the protective cover, of the supporting shell. The air draft assembly draws external cold air through the air inlet channel, and the cold air is blown to fan blades of the axial flow fan from the air outlet channel after being heated by the heating assembly. Therefore, it is ensured that the whole fan blade is within the wrapping range of hot air, ice layers or accumulated snow on the surface of the fan blade is effectively removed, and the deicing effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical engineering, and in particular to a deicing device, an axial flow fan and an air conditioning system. Background Art

[0002] Axial fans are important air-powered devices in air-conditioning systems and are widely used in air supply, exhaust and circulating air systems. Commercial air-conditioning units such as modular units and air-cooled screw units are usually installed outdoors, which makes the axial fans of such units vulnerable to bad weather. In winter, the outdoor temperature is low. When there is snowfall or rain, the air humidity is high, and moisture is easy to condense and freeze on the surface of the axial fan of the air-conditioning unit. Especially in the shutdown state, the fan surface temperature is low, and it is easier to form ice or snow. Ice or snow attached to the surface of the axial fan will increase the imbalance of the axial fan, causing the vibration to intensify, and in severe cases may damage the fan bearings, blades or the entire unit frame. In addition, ice or snow will increase the load of the axial fan, causing the starting current to increase sharply. If the current exceeds the rated range of the motor, it may cause the motor to overload or even burn. Therefore, it is necessary to check whether there is ice or snow on the surface of the axial fan before starting the unit. If ice or snow is found, it needs to be cleaned before running.

[0003] However, axial flow fans are usually located on the top or outside of the unit, and commercial air conditioning units are large in size, making it difficult to clean ice or snow, which poses certain safety hazards. In addition, at present, the following deicing methods are mainly used in the existing technology to solve the problem of axial flow fan icing:

[0004] First, mechanical deicing: the ice layer is scraped off manually or mechanically, but the scraping requires repeated operations, which is time-consuming and labor-intensive, and there are safety hazards such as falling and scratching.

[0005] Second, vibration deicing: The vibration motor runs at the resonant frequency of the axial fan blades to break the ice on the blades, but this poses a risk of damaging the blades or even the fan components.

[0006] Third, electric heating for deicing. This requires changing the structure of the axial fan and installing a heating device on the surface of the blades. The heating device is used to heat and de-ice the blades of the axial fan. The manufacturing process is complex, the energy consumption is high, and the heating is uneven, which can easily cause local overheating, resulting in repeated freezing of "ice-water-ice", and there is also a risk of falling off.

[0007] Therefore, how to improve the deicing effect of the deicing device without changing the structure of the axial flow fan is a technical problem that needs to be solved urgently. Summary of the invention

[0008] The present invention provides a deicing device, an axial flow fan and an air conditioning system, which are used to solve the problem that the deicing effect of the deicing device in the prior art is poor.

[0009] The technical solution of the present invention is a deicing device, comprising:

[0010] A support shell having a through hole in the axial direction; the support shell is used to be independently assembled on the wind shield of the axial flow fan;

[0011] A protective cover, which covers the supporting shell, and an annular air inlet channel is formed between the supporting shell and the protective cover;

[0012] A mounting plate, the support shell is covered on the mounting plate, the mounting plate is provided with an exhaust assembly corresponding to the through hole, and an annular air outlet channel is formed between the support shell and the mounting plate;

[0013] A heating assembly is circumferentially arranged in the support shell and away from one end of the protective cover;

[0014] The exhaust component draws cold air from the outside through the air inlet channel, heats the cold air through the heating component, and then blows the cold air from the air outlet channel to the blades of the axial flow fan.

[0015] Furthermore, an edge of the mounting plate is provided with an adaptive folded edge obliquely corresponding to the air outlet channel, and the inclination direction of the folded edge is inclined along a side away from the protective cover, so that the inner diameter of the air outlet channel is continuously reduced.

[0016] Furthermore, a plurality of fixing members are provided at the outermost side of the folded edge along the circumferential direction, and each of the fixing members is matched with a fastener;

[0017] The mounting plate is spaced apart from the folded edge, and the fastener is connected to the side wall of the supporting shell after passing through the fixing member.

[0018] Furthermore, a support plate is circumferentially arranged at the lower portion of the outer side wall of the support shell, and the support plate is located below the air inlet of the air inlet channel;

[0019] The support plate is used to form an axial limiting fit with the edge of one end of the central through hole of the wind shield of the axial flow fan toward the deicing device, so as to independently assemble the support shell and the axial flow fan.

[0020] Furthermore, a current collector is arranged around one end of the through hole facing the protective cover.

[0021] Furthermore, a plurality of support members are vertically arranged along the circumferential direction between the edge of the collector and the protective cover.

[0022] Furthermore, a pressure detection device is provided on the support member, and the pressure detection device is used to detect the weight change of the protective cover.

[0023] Furthermore, a temperature detection device is provided on the inner wall of the protective cover, and the temperature detection device is used to detect whether the axial flow fan is frozen or snowed.

[0024] The present invention further provides an axial flow fan, which includes the deicing device described above.

[0025] The present invention further provides an air conditioning system, which includes the axial flow fan described above.

[0026] Compared with the prior art, the present invention has at least the following beneficial effects:

[0027] The present invention evenly heats the cold air in the air outlet channel by a heating component circumferentially arranged along one end of the supporting shell and away from the protective cover, and then accurately blows the heated cold air from the air outlet of the air outlet channel to the fan blades of the axial flow fan. The fan blades are entirely within the wrapping range of the hot air, thereby effectively removing ice or snow on the surface of the fan blades, improving the deicing effect, and will not cause local overheating of the fan blades or uneven heating problems, and will not cause repeated freezing of "ice-water-ice", thereby reducing energy consumption; and the deicing device is independently assembled on the axial flow fan, and there is no need to additionally change the structure of the axial flow fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present invention or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0030] Figure 1 A cross-sectional view of the deicing device proposed by the present invention;

[0031] Figure 2A schematic diagram of the airflow of the deicing device proposed by the present invention;

[0032] Figure 3 It is an exploded schematic diagram of the deicing device proposed by the present invention;

[0033] Figure 4 A partial structural schematic diagram of the deicing device proposed by the present invention;

[0034] Figure 5 A partial cross-sectional view of the air inlet channel proposed by the present invention;

[0035] Figure 6 A partial cross-sectional view of the air outlet channel proposed by the present invention;

[0036] Figure 7 This is a schematic diagram of the structure of the axial flow fan proposed by the present invention;

[0037] Figure 8 for Figure 7 An enlarged schematic diagram of the reference numeral A in FIG.

[0038] Reference numerals:

[0039] 11. Support shell; 111. Through hole; 112. Support plate; 113. First profile line;

[0040] 12. Protective cover; 121. Temperature detection device; 122. Second molding line;

[0041] 13. Air inlet channel;

[0042] 14. Mounting plate; 141. Folding edge; 142. Fixing piece;

[0043] 15. exhaust assembly; 151. motor; 152. centrifugal fan blade;

[0044] 16. Air outlet channel;

[0045] 17. Heating assembly; 171. Fixing clip;

[0046] 18. current collector; 181. second supporting plate; 182. third profile;

[0047] 19. Supporting parts;

[0048] 21. Wind shield;

[0049] 22. Wind blade;

[0050] 23. Axial flow motor;

[0051] 24. Base;

[0052] 25. Guide ring;

[0053] 26. The first supporting plate. DETAILED DESCRIPTION

[0054] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Thus, a feature indicated in this specification will be used to illustrate one of the features of an embodiment of the present invention, rather than implying that each embodiment of the present invention must have the described features. In addition, it should be noted that this specification describes many features. Although certain features can be combined together to illustrate possible system designs, these features can also be used in other combinations that are not explicitly described. Thus, unless otherwise stated, the described combinations are not intended to be limiting.

[0055] The principle and structure of the present invention are described in detail below with reference to the accompanying drawings and embodiments.

[0056] In the prior art, axial flow fans are important air-powered equipment in air-conditioning systems and are widely used in air supply, exhaust and circulating air systems. Commercial air-conditioning units such as modular units and air-cooled screw units are usually installed outdoors, which makes the axial flow fans of such units vulnerable to bad weather. In winter, the outdoor temperature is low. When there is snowfall or rain, the air humidity is high, and moisture is easy to condense and freeze on the surface of the fan blades of the axial flow fan of the air-conditioning unit. Especially in the shutdown state, the surface temperature of the fan blades is low, and it is easier to form ice or snow. Ice or snow attached to the surface of the fan blades of the axial flow fan will increase the imbalance of the axial flow fan, causing the vibration to intensify, and in severe cases may damage the fan bearings, blades or the entire unit frame. In addition, ice or snow will increase the load of the axial flow fan, causing the starting current to increase sharply. If the current exceeds the rated range of the motor, it may cause the motor to overload or even burn. Therefore, it is necessary to check whether there is ice or snow on the surface of the fan blades before starting the unit. If ice or snow is found, it needs to be cleaned before running.

[0057] Therefore, in some embodiments, to prevent ice or snow from forming on the surface of the fan blades 22 of the axial flow fan, Figure 1 and Figure 2 As shown, the present invention provides a deicing device, comprising:

[0058] A support shell 11 is provided with a through hole 111 in the axial direction; the support shell 11 is used to be independently assembled on the wind cover 21 of the axial flow fan;

[0059] A protective cover 12, which covers the supporting shell 11, and an annular air inlet channel 13 is formed between the supporting shell 11 and the protective cover 12;

[0060] A mounting plate 14, the supporting shell 11 covers the mounting plate 14, the mounting plate 14 is provided with an exhaust assembly 15 corresponding to the through hole 111, and an annular air outlet channel 16 is formed between the supporting shell 11 and the mounting plate 14;

[0061] A heating assembly 17, which is circumferentially arranged inside the support shell 11 and away from one end of the protective cover 12;

[0062] Among them, the exhaust component 15 draws cold air from the outside through the air inlet channel 13, and heats the cold air through the heating component 17 and then blows it from the air outlet channel 16 to the fan blades 22 of the axial flow fan (a plurality of fan blades 22 and a hub form an impeller, the same applies to the entire text).

[0063] It should be noted that the support shell 11 and the protective cover 12 proposed in this embodiment are both in the shape of a hollow cylindrical structure, and the mounting plate 14 is a circular plate; and the bottom end of the protective cover 12 is an open structure (the bottom end of the protective cover 12 is equivalent to the end of the protective cover 12 facing the mounting plate 14, the same throughout the text), the bottom end of the support shell 11 is an open structure (the bottom end of the support shell 11 is equivalent to the end of the support shell 11 facing the mounting plate 14, the same throughout the text), and a circular through hole 111 is provided in the middle of the top end of the support shell 11 (the top end of the support shell 11 is equivalent to the other end of the support shell 11 facing away from the mounting plate 14, the same throughout the text).

[0064] Among them, the inner diameter of the bottom end of the protective cover 12 is larger than the outer diameter of the top end of the supporting shell 11, so that when the protective cover 12 is covered on the supporting shell 11, a gap will be formed between the side wall of the protective cover 12 and the side wall of the supporting shell 11, and the gap and the hollow structure of the protective cover 12 constitute an air inlet channel 13, and the gap is equivalent to the air inlet of the air inlet channel 13, and the air inlet is a continuous annular structure; in this way, the protective cover 12 can prevent accumulated snow and rainwater from entering the interior of the de-icing device, thereby effectively improving the protective performance of the de-icing device. Similarly, the outer diameter of the bottom end of the support shell 11 is greater than or equal to the outer diameter of the mounting plate 14, so that when the protective cover 12 is covered on the mounting plate 14, the mounting plate 14 will not extend out of the support shell 11, and the bottom end of the support shell 11 and the mounting plate 14 are spaced apart, and the interval and the hollow structure of the support shell 11 constitute an air outlet channel 16, and the interval between the bottom end of the support shell 11 and the mounting plate 14 is equivalent to the air outlet of the air outlet channel 16, which is a continuous annular jet air outlet to achieve 360° air supply without dead ends, which can ensure that hot air is delivered to the surface of the fan blades 22 regardless of the position of the axial flow fan.

[0065] Among them, a continuous heating assembly 17 is circumferentially arranged at one end of the support shell 11 away from the protective cover 12; of course, a plurality of heating assemblies 17 are evenly arranged circumferentially at one end of the support shell 11 away from the protective cover 12, which is not limited here. In order to ensure the connection stability of the heating assembly 17, the heating assembly 17 is fixed in the support shell 11 by a plurality of fixing clips to achieve position limiting.

[0066] Among them, the exhaust assembly 15 proposed in this embodiment is composed of a motor 151 and a centrifugal fan blade 152, and the centrifugal fan blade 152 is preferably a backward centrifugal fan blade; the motor 151 passes through the middle of the mounting plate 14, and the rotating output end of the motor 151 is connected to the centrifugal fan blade 152, and the centrifugal fan blade 152 is arranged opposite to the through hole 111 of the supporting shell 11 so as to draw the cold air in the air inlet channel 13 into the air outlet channel 16.

[0067] In this way, when ice or snow appears on the fan blades 22 of the axial flow fan, the control unit of the axial flow fan (not shown, the same as in the whole text) will start the exhaust component 15 and the heating component 17, and then the exhaust component 15 will draw the cold air in the air inlet channel 13 into the air outlet channel 16, and the cold air in the air outlet channel 16 will be heated by the heating component 17 to form hot air (the distinction between hot air and cold air is based on their relative temperature comparison, rather than an absolute numerical standard, but the temperature of hot air must be greater than the temperature of cold air), and then blown from the air outlet of the air outlet channel 16 to the axial flow fan. The surface of the fan blade 22 of the fan is ensured to ensure that the airflow blown out from the air outlet channel 16 is all hot air, so that the fan blade 22 is completely wrapped in the hot air, avoiding problems such as uneven heating or local overheating, thereby cleaning the ice or snow on the fan blade 22, ensuring the balance of the axial flow fan, and preventing the vibration from being aggravated and causing damage to the axial flow fan; and cleaning the ice or snow on the fan blade 22 can also reduce the load of the axial flow fan, preventing the starting current from increasing sharply and exceeding the rated range of the axial flow motor 23 in the axial flow fan, causing the axial flow motor 23 to be overloaded or even burned.

[0068] Therefore, the present invention evenly heats the cold air in the air outlet duct 16 by means of a heating component 17 circumferentially arranged along one end of the supporting shell 11 away from the protective cover 12, and then accurately blows the heated cold air from the air outlet of the air outlet duct 16 to the fan blades 22 of the axial flow fan. The fan blades 22 are entirely within the wrapping range of the hot air, and the ice or snow on the surface of the fan blades 22 is effectively removed, thereby improving the deicing effect, and will not cause the problem of local overheating or uneven heating of the fan blades 22, and will not form the "ice-water-ice" repeated freezing phenomenon, thereby reducing energy consumption.

[0069] It should be noted that if Figure 5As shown, the radius of the entire supporting shell 11 is b, and the value range of b is 1.6R≤b≤1.8R, where R is the impeller radius of the exhaust assembly 15; if the value of b is too small, the airflow in the air inlet channel 13 cannot be fully developed, affecting the air intake volume of the exhaust assembly 15; if the value of b is too large, the volume of the de-icing device is too large, blocking the air inlet area of ​​the axial flow fan using the de-icing device, affecting the air volume of the axial flow fan.

[0070] The axial distance between the supporting shell 11 and the protective cover 12 is e, and the value range of e is 0.4L≤e≤0.6L, where L is the blade height of the centrifugal fan blade 152; if the value of e is too small, the resistance of the air inlet channel 13 will increase, resulting in air intake loss, affecting the air intake of the de-icing device; if the value of e is too large, the volume of the de-icing device will be too large, affecting the convenience of assembly and use.

[0071] The radius of the first profile 113 of the supporting shell 11 is r1, and the value range of r1 is r1≥0.6L; the radius of the second profile 122 of the protective cover 12 is r2, and the value range of r2 is r2≥0.6L; wherein L is the blade height of the centrifugal fan blade 152; the purpose of taking the values ​​of r1 and r2 is to further reduce the resistance of the air inlet channel 13, reduce the loss of air intake, and ensure the air intake of the deicing device.

[0072] The first profile 113 refers to the contour line of the cross section of the supporting shell 11, and the radius r1 of the first profile 113 refers to the curvature radius of the geometric center line (i.e., the mid-surface) of the supporting shell 11; the second profile 122 refers to the contour line of the cross section of the protective cover 12, and the radius r2 of the second profile 122 refers to the curvature radius of the geometric center line (i.e., the mid-surface) of the protective cover 12.

[0073] The height of the protective cover 12 is d, and the value range of d is 1.1(e+r1)≤d≤1.3(e+r1). If the value of d is too small, it cannot effectively prevent snow and rain from entering the de-icing device, affecting the protective performance of the de-icing device; if the value of d is too large, it will affect the air intake conditions of the de-icing device.

[0074] In some embodiments, in order to increase the air flow velocity of the heated cold air blowing onto the fan blades 22 of the axial flow fan, as shown in FIG. Figure 1 and Figure 3 As shown, the edge of the mounting plate 14 is inclined with an adaptive folded edge 141 corresponding to the air outlet channel 16, and the folded edge 141 is inclined along the side away from the protective cover 12, so that the inner diameter of the air outlet channel 16 is continuously reduced.

[0075] In this way, the inner diameter of the outlet of the outlet channel 16 is continuously reduced to ensure that the inner diameter of the outlet of the outlet channel 16 is minimized, so that according to the Bernoulli equation, the sum of the static pressure and dynamic pressure of the fluid is constant. When the outlet channel 16 becomes narrower, the kinetic energy (dynamic pressure) of the fluid increases, and the static pressure decreases accordingly. This energy conversion forces the heated cold air to accelerate through the narrow area, thereby increasing the air flow speed so that the heated cold air can penetrate the gap between the ice layer and the equipment, which can not only melt the surface ice, but also melt the inner layer of ice to achieve complete de-icing.

[0076] It should be noted that if Figure 6 As shown, the angle between the folded edge 141 and the axis of the protective cover 12 is β, and the value range of β is 45°≤β≤60°; if the value of β is too small, the local loss of the air flow entering the air outlet channel 16 from the air outlet of the exhaust assembly 15 will be too large, affecting the air output of the deicing device; if the value of β is too large, it will affect the air flow angle of the heated cold air blown out through the annular jet air outlet of the air outlet channel 16, making it impossible for the heated cold air to accurately cover the surface of the fan blades 22 of the axial flow fan, affecting the deicing efficiency.

[0077] The inner diameter of the annular jet air outlet of the air outlet channel 16 is f, and the value range of f is 2mm≤f≤5mm; if the value of f is too small, the loss of hot air when it is blown out through the annular jet air outlet will increase, affecting the air output of the deicing device; if the value of f is too large, the air flow velocity of the heated cold air when it is blown out through the annular jet air outlet will be too small, and it will not be able to blow to the surface of the fan blade 22, thereby failing to effectively remove the ice or snow on the surface of the fan blade 22.

[0078] In some embodiments, to ensure that a stable annular air outlet channel 16 is formed between the support shell 11 and the mounting plate 14, as shown in FIG. Figure 4 As shown, the outermost side of the folded edge 141 is provided with a plurality of fixing members 142 along the circumferential direction, and each of the fixing members 142 is matched with a fastener (not shown, the same as in the whole text);

[0079] The mounting plate 14 is spaced apart from the folded edge 141 , and the fastener passes through the fixing member 142 and is connected to the side wall of the supporting shell 11 .

[0080] It should be noted that the fasteners proposed in this embodiment are preferably anti-vibration bolts.

[0081] In other embodiments (not shown in the figures), the outermost side of the folded edge 141 is provided with a plurality of fixing members 142 protruding along the circumferential direction and toward one side of the protective cover 12. The fixing member 142 is preferably a first clamping block, and the mounting plate 14 is provided with a matching first clamping groove corresponding to the fixing member 142. In this way, when the fixing member 142 is matched and clamped with the corresponding first clamping groove, the mounting plate 14 and the folded edge 141 are spaced apart, thereby ensuring that a stable annular air outlet channel 16 is formed between the support shell 11 and the mounting plate 14.

[0082] In some embodiments, to ensure that the de-icing device can be independently assembled with the axial flow fan, such as Figure 4 and Figure 8 As shown, a support plate 112 is circumferentially provided at the lower portion of the outer side wall of the support shell 11, and the support plate 112 is located below the air inlet of the air inlet channel 13;

[0083] The support plate 112 is used to form an axial limit fit with the edge of the central through hole of the wind shield 21 of the axial flow fan toward one end of the deicing device, so as to independently assemble the support shell 11 and the axial flow fan.

[0084] It should be noted that if Figure 7 As shown, the axial flow fan proposed in this embodiment includes a wind cover 21, a fan blade 22, an axial flow motor 23, a base 24, and a guide ring 25; wherein, the axial flow motor 23 is arranged in the middle of the bottom of the base 24, the rotation output end of the axial flow motor 23 passes through the base 24 and is connected to the fan blade 22, and the fan blade 22 is located at the top of the base 24, and a continuous annular guide ring 25 is arranged around the fan blade 22 at the top of the base 24, and the guide ring 25 is covered with a wind cover 21 on one side away from the base 24, and a central through hole is arranged in the middle of the wind cover 21, and the central through hole is used for independent assembly with the deicing device.

[0085] Therefore, the edge of the central through hole of the wind shield 21 away from the base 24 extends outward and circumferentially to form a first supporting plate 26, and then the support shell 11 and the mounting plate 14 located below the supporting plate 112 match and extend into the central through hole of the wind shield 21, and the supporting plate 112 is supported on the first supporting plate 26 and forms an axial limit fit, and then the anti-vibration bolts pass through the supporting plate 112 and the first supporting plate 26 in sequence to form a bolt connection, so that the de-icing device and the axial flow fan are independently assembled, which is convenient for installation and does not require additional changes to the structure of the axial flow fan; of course, multiple anti-vibration bolts are arranged along the circumference of the supporting plate 112. And the supporting plate 112 can be a continuous or discontinuous annular structure, which is not limited here.

[0086] In other embodiments (not shown in the figures), a plurality of second clamping blocks are circumferentially provided on one side of the support plate 112 facing the first support plate 26, and the first support plate 26 is provided with a matching second clamping groove corresponding to the second clamping block. Therefore, the support shell 11 and the mounting plate 14 located below the support plate 112 are matched and extended into the central through hole of the wind cover 21, and the second clamping block is matched and clamped with the corresponding second clamping groove to support the support plate 112 on the first support plate 26 and form an axial limit fit, thereby achieving the requirement that the de-icing device and the axial flow fan are independently assembled, easy to install, and no additional changes to the structure of the axial flow fan are required.

[0087] In some embodiments, in order to ensure that the cold air coming from the air inlet channel 13 is guided to the impeller, the airflow establishes a uniform velocity field and pressure field in the front section of the air inlet of the exhaust component 15 to avoid local turbulence or separation of the airflow, such as Figure 1 As shown, a current collector 18 is disposed around one end of the through hole 111 facing the protective cover 12 .

[0088] It should be noted that if Figure 3 As shown, the collector 18 proposed in this embodiment is cylindrical, and a continuous or discontinuous second supporting plate 181 is arranged outwardly and circumferentially on the top of the collector 18 toward the protective cover 12, so that the collector 18 located below the second supporting plate 181 matches and extends into the through hole 111, and then the second supporting plate 181 is supported by the edge of one end of the through hole 111 toward the protective cover 12 to form a fixed connection.

[0089] It should be noted that if Figure 5 As shown, the radius of the air inlet of the collector 18 is a, and the value range of a is 0.6R≤a≤0.75R, where R is the impeller radius of the exhaust component 15; if a is too small, the air inlet condition of the exhaust component 15 will be insufficient, affecting the exhaust volume of the exhaust component 15; if a is too large, the volume of the exhaust component 15 will be too large, blocking the air inlet area of ​​the axial flow fan using the de-icing device, affecting the air volume of the axial flow fan.

[0090] The inner diameter of the air inlet of the air inlet channel 13 is c, and the calculation formula of c is:

[0091]

[0092] The purpose of selecting the value of c is to ensure that the air inlet area of ​​the air inlet channel 13 is consistent with the air inlet area of ​​the collector 18, thereby reducing the influence of the protective cover 12 on the air intake volume of the deicing device.

[0093] The radius of the third profile 182 of the collector 18 is r3, and the value range of r3 is 0.2R≤r3≤0.3R. Setting a reasonable r3 is beneficial to reducing the loss of air flow when entering the exhaust component 15, improving the uniformity of air intake at the air inlet of the exhaust component 15, and improving the working efficiency of the exhaust component 15.

[0094] The third profile line 182 refers to the contour line of the cross section of the current collector 18 , and the radius r3 of the third profile line 182 refers to the radius of curvature of the geometric center line (ie, the center surface) of the current collector 18 .

[0095] In some embodiments, in order to ensure that a stable annular air inlet channel 13 is formed between the supporting shell 11 and the protective cover 12, as shown in FIG. Figure 1 As shown, a plurality of support members 19 are vertically provided along the circumferential direction between the edge of the collector 18 (equivalently on the second supporting plate 181 ) and the protective cover 12 .

[0096] In some embodiments, Figure 1 As shown, the inner wall of the protective cover 12 is provided with a temperature detection device 121, and the temperature detection device 121 is used to detect whether the axial flow fan is frozen or snowed.

[0097] It should be noted that the temperature detection device 121 proposed in this embodiment is preferably a temperature sensor, and the temperature detection device 121 is located in the middle of the inner wall of the protective cover 12 facing the through hole 111; and the temperature detection device 121 is electrically connected to the control unit.

[0098] Among them, the temperature detection device 121 is used to detect the temperature condition of the axial flow fan. If the temperature detected by the temperature detection device 121 is lower than the threshold temperature threshold, it can be determined that ice and snow weather has occurred and the axial flow fan has ice or snow accumulation. At this time, the temperature detection device 121 will send a temperature electrical signal to the control unit. After receiving the signal, the control unit will start the exhaust component 15 and the heating component 17. Then the exhaust component 15 will draw the cold air in the air inlet channel 13 into the air outlet channel 16. The cold air in the air outlet channel 16 is heated by the heating component 17 and then blown from the air outlet of the air outlet channel 16 to the surface of the fan blade 22 of the axial flow fan, thereby cleaning the ice or snow on the fan blade 22.

[0099] Furthermore, in order to better determine whether the axial flow fan is iced or snowed, a pressure detection device (not shown, the same applies to the entire text) is provided on the support member 19 , and the pressure detection device is used to detect the weight change of the protective cover 12 .

[0100] It should be noted that the pressure detection device proposed in this embodiment is preferably a pressure sensor, and at least one support member 19 is provided with a pressure detection device; and the pressure detection device is electrically connected to the control unit.

[0101] The specific judgment process is as follows:

[0102] If the pressure detection device detects that the weight on the protective cover 12 is ≥ the preset weight threshold, it will send a pressure electrical signal to the control unit. At the same time, when the temperature detected by the temperature detection device 121 is ≤0°C, it indicates that there is ice or snow on the fan blades 22 of the axial flow fan. The control unit will simultaneously start the exhaust component 15 and the heating component 17, and the de-icing mode will start to blow the heated cold air to the surface of the fan blades 22, thereby clearing the ice or snow on the fan blades 22.

[0103] If the pressure detection device detects that the weight on the protective cover 12 is ≥ the preset weight threshold, and the temperature detected by the temperature detection device 121 is > 0°C, it indicates that there are non-ice and snow deposits on the surface of the axial flow fan. The control unit starts the exhaust component 15, the heating component 17 is not started, and the cleaning mode starts to run to clean the non-ice and snow deposits on the surface of the axial flow fan.

[0104] If the pressure detection device detects that the weight on the protective cover 12 is less than the preset weight threshold, it indicates that there is no accumulation on the surface of the axial flow fan and the deicing device does not operate.

[0105] In some embodiments, Figure 7 and Figure 8 As shown, the present invention further proposes an axial flow fan, which includes the deicing device mentioned above.

[0106] In this way, when ice or snow accumulates on the fan blades 22 of the axial flow fan, the control unit will start the exhaust component 15 and the heating component 17, and then the exhaust component 15 will draw the cold air in the air inlet channel 13 into the air outlet channel 16. The cold air in the air outlet channel 16 is heated by the heating component 17 to form hot air, and then blown from the air outlet of the air outlet channel 16 to the surface of the fan blades 22 of the axial flow fan, ensuring that the airflow blown out from the air outlet channel 16 is hot air, so that the fan blades 22 are wrapped in the hot air as a whole. In order to avoid problems such as uneven heating or local overheating, the ice or snow on the fan blades 22 can be cleaned up to ensure the balance of the axial flow fan and prevent the vibration from being aggravated and causing damage to the axial flow fan. Cleaning the ice or snow on the fan blades 22 can also reduce the load of the axial flow fan and prevent the starting current from increasing sharply and exceeding the rated range of the axial flow motor 23 in the axial flow fan, causing the axial flow motor 23 to be overloaded or even burned, thereby ensuring the stable operation of the axial flow fan and extending the service life of the axial flow fan.

[0107] In some embodiments, the present invention further provides an air conditioning system, which includes the axial flow fan described above.

[0108] In this way, when ice or snow accumulates on the fan blades 22 of the axial flow fan, the control unit will start the exhaust component 15 and the heating component 17, and then the exhaust component 15 will draw the cold air in the air inlet channel 13 into the air outlet channel 16. The cold air in the air outlet channel 16 is heated by the heating component 17 to form hot air, and then blown from the air outlet of the air outlet channel 16 to the surface of the fan blades 22 of the axial flow fan, ensuring that the airflow blown out from the air outlet channel 16 is hot air, so that the fan blades 22 are wrapped in the hot air as a whole. In order to avoid problems such as uneven heating or local overheating, the ice or snow on the fan blades 22 can be cleaned up to ensure the balance of the axial flow fan and prevent the vibration from being aggravated and causing damage to the axial flow fan. Cleaning the ice or snow on the fan blades 22 can also reduce the load of the axial flow fan and prevent the starting current from increasing sharply and exceeding the rated range of the axial flow motor 23 in the axial flow fan, causing the axial flow motor 23 to be overloaded or even burned, thereby ensuring the stable operation of the air-conditioning system and extending the service life of the air-conditioning system.

[0109] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A deicing device, characterized in that: include: A support shell (11) is provided with a through hole (111) along the axial direction; the support shell (11) is used to be independently assembled on the wind shield of the axial flow fan; A protective cover (12) covering the supporting shell (11), wherein an annular air inlet passage (13) is formed between the supporting shell (11) and the protective cover (12); a mounting plate (14), the supporting shell (11) covering the mounting plate (14), the mounting plate (14) being provided with an air exhaust assembly (15) corresponding to the through hole (111), and an annular air outlet channel (16) being formed between the supporting shell (11) and the mounting plate (14); A heating assembly (17) is circumferentially arranged inside the support shell (11) and along one end away from the protective cover (12); The exhaust component (15) draws cold air from the outside through the air inlet channel (13), heats the cold air through the heating component (17), and then blows the cold air from the air outlet channel (16) to the blades of the axial flow fan.

2. The deicing device according to claim 1, characterized in that: An adaptive folding edge (141) is obliquely arranged on the edge of the mounting plate (14) corresponding to the air outlet channel (16); the folding edge (141) is inclined in a direction away from the protective cover (12), so that the inner diameter of the air outlet channel (16) is continuously reduced.

3. The deicing device according to claim 2, characterized in that: The outermost side of the folded edge (141) is provided with a plurality of fixing members (142) along the circumferential direction, and each of the fixing members (142) is matched with a fastener; The mounting plate (14) and the folded edge (141) are spaced apart, and the fastener passes through the fixing member (142) and is connected to the side wall of the supporting shell (11).

4. The deicing device according to claim 1, characterized in that: A support plate (112) is circumferentially arranged at the lower portion of the outer side wall of the support shell (11), and the support plate (112) is located below the air inlet of the air inlet channel (13); The support plate (112) is used to form an axial limiting fit with the edge of the central through hole of the wind shield of the axial flow fan toward one end of the deicing device, so as to independently assemble the support shell (11) and the axial flow fan.

5. The deicing device according to claim 1, characterized in that: A current collector (18) is arranged around one end of the through hole (111) facing the protective cover (12).

6. The deicing device according to claim 5, characterized in that: A plurality of support members (19) are vertically arranged along the circumferential direction between the edge of the current collector (18) and the protective cover (12).

7. The deicing device according to claim 6, characterized in that: The support member (19) is provided with a pressure detection device, and the pressure detection device is used to detect the weight change of the protective cover (12).

8. The deicing device according to claim 1, characterized in that: The inner wall of the protective cover (12) is provided with a temperature detection device (121), and the temperature detection device (121) is used to detect whether the axial flow fan is frozen or snowed.

9. An axial flow fan, characterized in that: The axial flow fan comprises the deicing device according to any one of claims 1-8.

10. An air conditioning system, characterized in that: The air conditioning system comprises the axial flow fan according to claim 9.

Images