High-temperature-resistant axial flow fan

Abstract

The utility model discloses a high-temperature-resistant axial flow fan which comprises a main body unit and a machine shell, and a heat dissipation cylinder is arranged in the machine shell. And the ventilation unit comprises fan blades, the fan blades are driven by a motor, a heat insulation shell is arranged on the outer side of the motor, the top of the heat insulation shell is fixedly connected with the bottom of the heat dissipation barrel, three ventilation holes which are transversely arranged are formed in the back face of the heat insulation shell, and ventilation hole sealing assemblies are arranged on the outer sides of the three ventilation holes. The rotary knob is rotated to drive the connecting rotating shaft and the control rotating shaft to rotate, and the three ventilation holes with different numbers can be closed by adjusting the positions of the three nuts, so that the airflow passing through the ventilation holes is adjusted, and the opening number of the ventilation holes is flexibly adjusted according to the temperature of the airflow; therefore, the airflow is prevented from raising the heat of the motor shell, and the airflow flowing through the ventilation holes is used for cooling the motor shell in a flowing manner.

Description

Technical Field

[0001] The utility model relates to the technical field of axial flow fans, in particular to a high temperature resistant axial flow fan. Background Art

[0002] An axial flow fan is a fan that makes the air flow move axially by rotating the fan blades. It has the characteristics of simple structure, stability and reliability, low noise, low cost and small size. Therefore, it can be used for ventilation and blowing effects in household ovens or stoves.

[0003] Most existing axial flow fan motors are exposed inside the casing. When the temperature of the air flowing through the fan is high, the air flowing through the motor easily increases the temperature of the motor casing, thereby reducing the service life of the motor. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above problems existing in the existing high temperature resistant axial flow fan, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a high-temperature resistant axial flow fan, which is to solve the problem that "most of the existing axial flow fan motors are exposed inside the casing. When the temperature of the air flow flowing through the fan is high, the air flow passing through the motor will easily increase the temperature of the motor casing, thereby reducing the service life of the motor."

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a high temperature resistant axial flow fan, comprising:

[0008] The main unit comprises a casing, an inner wall of the casing is fixedly connected with a mounting plate, a top of the mounting plate is fixedly connected with a limit block, a heat dissipation tube is arranged inside the casing, and a top of the heat dissipation tube penetrates to the top of the casing;

[0009] The ventilation unit includes fan blades, which are driven by a motor. An insulating shell is arranged on the outside of the motor, and the insulating shell is fixedly connected to the top of the mounting plate. The top of the insulating shell is fixedly connected to the bottom of the heat dissipation cylinder. Three ventilation holes arranged horizontally are arranged on the back of the insulating shell, and ventilation hole closing assemblies are arranged on the outsides of the three ventilation holes. A knob is arranged on the outer wall of the casing, a sliding rod is arranged below the knob, and a rotating assembly is arranged on the side of the knob. The rotating assembly passes through a limit block and is rotatably connected, and the rotating assembly drives the ventilation hole closing assembly to rotate. A driving assembly is arranged on the back of the insulating shell, and the sliding rod drives the driving assembly to move vertically.

[0010] As a preferred solution of the high-temperature resistant axial flow fan described in the utility model, a heat sink is fixedly connected to the bottom of the inner wall of the heat dissipation tube, and a wire mesh is arranged on the top of the heat dissipation tube to prevent external dust from entering the interior of the heat dissipation tube.

[0011] As a preferred solution of the high-temperature resistant axial flow fan described in the utility model, the outer end of the sliding rod penetrates to the outside of the casing and is movably connected, the outer wall of the sliding rod is fixedly connected with a hanging rope, the outer wall of the casing is fixedly connected with a fixing nail, and the hanging rope is wrapped around the outer wall of the fixing nail.

[0012] As a preferred solution of a high-temperature resistant axial flow fan described in the utility model, a through groove is provided on the left side of the limit block, the sliding rod is movably connected inside the through groove, a plurality of springs are fixedly connected to the bottom of the inner wall of the through groove, the top of the spring is fixedly connected to the bottom of the sliding rod, a limiting groove is provided on the inner wall of the through groove, the inner wall of the limiting groove is movably connected to a limiting slider, and the limiting slider is fixedly connected to the sliding rod.

[0013] As a preferred solution of a high-temperature resistant axial flow fan described in the utility model, wherein: the driving assembly includes a folding bracket and three limiting slide bars, the folding bracket is fixedly connected to the back side of the insulation shell, the limiting slide bar is fixedly connected to the top of the folding bracket, the outer wall of the limiting slide bar is movably connected with a connecting slide bar, a notch is provided at the rear bottom of the connecting slide bar, the side of the connecting slide bar is fixedly connected with a closed cover plate, and the closed cover plate is arranged on the back side of the ventilation hole.

[0014] As a preferred solution of a high-temperature resistant axial flow fan described in the utility model, wherein: the ventilation hole closing assembly includes a splint and a rotating block, the inner wall of the splint is movably connected to the outer wall of the rotating block, a nut is fixedly connected to the left side of the inner wall of the splint, the top of the splint is fixedly connected to a U-shaped block, the inner wall of the U-shaped block is movably connected to a limiting rod, the side end of the limiting rod is fixedly connected to the back side of the insulation shell through a pad, the bottom of the rotating block is fixedly connected to a fixing rod, the outer wall of the fixing rod is movably connected to a telescopic rod, the side of the telescopic rod is fixedly connected to a clamping block, and the clamping block is clamped inside the notch on the rear side of the connecting slider.

[0015] As a preferred solution of a high-temperature resistant axial flow fan described in the utility model, wherein: the rotating assembly includes a connecting shaft and a control shaft, the connecting shaft and the control shaft are connected by a coupling, the connecting shaft is fixedly connected to the knob, the outer wall of the control shaft is provided with three threads of equal length, and the spacing between two adjacent threads is equal to the spacing between two adjacent rotating blocks, the density of the three threads decreases successively, the nut is threadedly connected to the outer wall of the control shaft, and the rotating block is movably connected to the non-threaded part of the outer wall of the control shaft.

[0016] Beneficial effects of the utility model:

[0017] When the temperature of the air flow circulating inside the fan is high, the knob is turned, and the knob drives the connecting shaft and the control shaft to rotate. The control shaft drives the nut to move through the thread, and the U-shaped block moves along the limit rod to prevent the nut from rotating. The nut with the sparsest thread has the largest movement amplitude and makes the clamping plate and the outer part of the rotating block clamped. At the same time, the U-shaped block of the clamping plate is separated from the limit rod, so that the control shaft drives the clamping plate and the rotating block to rotate while the other two clamping plates still keep moving in a straight line. As the rotating block rotates, the clamping block is stuck in the inside of the notch on the rear side of the connecting slider, and then the hanging rope is untied. After losing the fixation, the sliding rod is driven upward by the spring, and the connecting slider drives the closed cover plate to move along the limit sliding rod. As the sliding rod moves, the connecting slider is driven to move through the moving block, and the vents are closed through the closed cover plate. By adjusting the positions of the three nuts, different numbers of closures of the three vents can be achieved, thereby adjusting the airflow passing through the vents, and flexibly adjusting the number of openings of the vents according to the temperature of the airflow, thereby preventing the airflow from increasing the heat of the motor housing while the airflow flowing through the vents dissipates the heat of the motor housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0019] Figure 1 This is a schematic diagram of the overall structure of a high temperature resistant axial flow fan proposed by the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the internal structure of the casing;

[0021] Figure 3 for Figure 1 Schematic diagram of the back structure of the heat insulation shell;

[0022] Figure 4 for Figure 3 Schematic diagram of the limit block structure;

[0023] Figure 5 for Figure 4 Schematic diagram of the ventilation hole closure component structure.

[0024] In the figure: 100, main unit; 101, housing; 102, mounting plate; 103, stop block; 103a, through slot; 103b, spring; 103c, stop slot; 103d, stop slider; 104, heat sink; 104a, heat sink; 104b, wire mesh; 200, ventilation unit; 201, fan blade; 202, heat insulation shell; 203, knob; 204, sliding rod; 204a, hanging rope; 204b, fixing nail; 205, rotating assembly; 205 a, connecting shaft; 205b, control shaft; 206, ventilation hole; 207, ventilation hole closing assembly; 207a, clamp; 207b, rotating block; 207c, U-shaped block; 207d, nut; 207e, limiting rod; 207f, fixing rod; 207g, telescopic rod; 207h, moving block; 207i, clamping block; 208, driving assembly; 208a, folding bracket; 208b, limiting sliding rod; 208c, connecting slider; 208d, closing cover. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0026] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0027] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0028] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0029] Reference Figure 1-5 The utility model provides a high temperature resistant axial flow fan, comprising:

[0030] The main unit 100 includes a housing 101, an inner wall of the housing 101 is fixedly connected to a mounting plate 102, a top of the mounting plate 102 is fixedly connected to a limit block 103, a heat dissipation tube 104 is arranged inside the housing 101, and the top of the heat dissipation tube 104 penetrates to the top of the housing 101;

[0031] The ventilation unit 200 includes a fan blade 201, which is driven by a motor. An insulating shell 202 is arranged on the outside of the motor. The insulating shell 202 is fixedly connected to the top of the mounting plate 102. The top of the insulating shell 202 is fixedly connected to the bottom of the heat dissipation tube 104. Three ventilation holes 206 arranged horizontally are opened on the back of the insulating shell 202. Ventilation hole closing components 207 are arranged on the outside of the three ventilation holes 206. A knob 203 is arranged on the outer wall of the casing 101. A sliding rod 204 is arranged below the knob 203. A rotating component 205 is arranged on the side of the knob 203. The rotating component 205 passes through the limit block 103 and is rotatably connected. The rotating component 205 drives the vent closing component 207 to rotate. A driving component 208 is arranged on the back of the insulating shell 202. The sliding rod 204 drives the driving component 208 to move vertically.

[0032] Among them, a heat sink 104a is fixedly connected to the bottom of the inner wall of the heat sink 104, and a wire mesh 104b is arranged on the top of the heat sink 104. The wire mesh 104b prevents external dust from entering the heat sink 104. The heat generated by the motor itself during operation is transferred to the inside of the heat sink 104 through the heat sink 104a and discharged upward, preventing heat accumulation inside the insulation shell 202.

[0033] Furthermore, the outer end of the sliding rod 204 passes through the outside of the casing 101 and is movably connected, the outer wall of the sliding rod 204 is fixedly connected with a hanging rope 204a, the outer wall of the casing 101 is fixedly connected with a fixing nail 204b, and the hanging rope 204a is wrapped around the outer wall of the fixing nail 204b, thereby fixing the position of the sliding rod 204.

[0034] Furthermore, a through slot 103a is provided on the left side of the limit block 103, and the sliding rod 204 is movably connected to the inside of the through slot 103a. A plurality of springs 103b are fixedly connected to the bottom of the inner wall of the through slot 103a, and the top of the spring 103b is fixedly connected to the bottom of the sliding rod 204. A limiting slot 103c is provided on the inner wall of the through slot 103a, and a limiting slider 103d is movably connected to the inner wall of the limiting slot 103c. The limiting slider 103d is fixedly connected to the sliding rod 204. After losing its fixation, the sliding rod 204 moves upward driven by the spring 103b, so that the sliding rod 204 drives the limiting slider 103d to move along the limiting slot 103c, thereby preventing the sliding rod 204 from tilting.

[0035] Furthermore, the driving assembly 208 includes a folding bracket 208a and three limiting slide bars 208b, the folding bracket 208a is fixedly connected to the back side of the insulation shell 202, the limiting slide bar 208b is fixedly connected to the top of the folding bracket 208a, the outer wall of the limiting slide bar 208b is movably connected with a connecting slider 208c, a notch is provided at the rear bottom of the connecting slider 208c, a closed cover plate 208d is fixedly connected to the side of the connecting slider 208c, the closed cover plate 208d is arranged on the back side of the ventilation hole 206, the connecting slider 208c drives the closed cover plate 208d to move along the limiting slide bar 208b, and the ventilation hole 206 is closed by the closed cover plate 208d.

[0036] Furthermore, the vent closing assembly 207 includes a clamping plate 207a and a rotating block 207b, the inner wall of the clamping plate 207a is movably connected to the outer wall of the rotating block 207b, a nut 207d is fixedly connected to the left side of the inner wall of the clamping plate 207a, a U-shaped block 207c is fixedly connected to the top of the clamping plate 207a, a limiting rod 207e is movably connected to the inner wall of the U-shaped block 207c, a side end of the limiting rod 207e is fixedly connected to the back of the heat insulation shell 202 through a pad, a fixing rod 207f is fixedly connected to the bottom of the rotating block 207b, and the fixing rod 207f is fixedly connected to the bottom of the rotating block 207b. The outer wall of 07f is movably connected with a telescopic rod 207g, and a block 207i is fixedly connected to the side of the telescopic rod 207g. The block 207i is stuck in the inside of the notch on the rear side of the connecting slider 208c, and the other side of the telescopic rod 207g is fixedly connected with a moving block 207h. The sliding rod 204 is arranged below the moving block 207h. The connecting slider 208c drives the telescopic rod 207g to move through the block 207i. The sliding rod 204 is stuck under the moving block 207h, thereby driving the connecting slider 208c to move as the sliding rod 204 moves.

[0037] Furthermore, the rotating assembly 205 includes a connecting shaft 205a and a control shaft 205b, the connecting shaft 205a and the control shaft 205b are connected by a coupling, the connecting shaft 205a is fixedly connected to the knob, the outer wall of the control shaft 205b is provided with three threads of equal length, and the spacing between two adjacent threads is equal to the spacing between two adjacent rotating blocks 207b, and the density of the three threads decreases in sequence, the nut 207d is threadedly connected to the outer wall of the control shaft 205b, and the rotating block 207b is movably connected to the non-threaded part of the outer wall of the control shaft 205b, and the control The control shaft 205b drives the nut 207d to move through the thread, and the U-shaped block 207c moves along the limit rod 207e to prevent the nut 207d from rotating. The nut 207d with the sparsest thread has the largest movement range and makes the clamping plate 207a engage with the outside of the rotating block 207b. At the same time, the U-shaped block 207c of the clamping plate 207a is disengaged from the limit rod 207e, so that the control shaft 205b drives the clamping plate 207a and the rotating block 207b to rotate while the remaining two clamping plates 207a still keep moving in a straight line, so that the three clamping plates 207a are engaged with the three rotating blocks 207b in turn.

[0038] During use, when the temperature of the air flow circulating inside the fan is high, the knob 203 is turned, and the knob 203 drives the connecting shaft 205a and the control shaft 205b to rotate. The control shaft 205b drives the nut 207d to move through the thread, and moves along the limit rod 207e through the U-shaped block 207c to prevent the nut 207d from rotating. The nut 207d with the sparsest thread moves the largest range and makes the clamping plate 207a engage with the outside of the rotating block 207b. At the same time, the U-shaped block 207c of the clamping plate 207a is disengaged from the limit rod 207e, so that the control shaft 205b drives the clamping plate 207a and the rotating block 207b to rotate while the other two clamping plates 207a still keep moving in a straight line. As the rotating block 207b rotates, the clamping block 207i is stuck on the connecting slider 20 8c, then untie the hanging rope 204a, and the sliding rod 204 moves upwards driven by the spring 103b after losing its fixation, and the connecting slider 208c drives the closing cover 208d to move along the limiting sliding rod 208b, and as the sliding rod 204 moves, it drives the connecting slider 208c to move through the moving block 207h, and closes the ventilation hole 206 through the closing cover 208d, and by adjusting the position of the three nuts 207d, different numbers of closures of the three ventilation holes 206 can be achieved, thereby adjusting the airflow passing through the ventilation holes 206, and flexibly adjusting the number of openings of the ventilation holes 206 according to the temperature of the airflow, thereby preventing the airflow from increasing the heat of the motor casing and at the same time allowing the airflow flowing through the ventilation holes 206 to dissipate heat for the motor casing.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A high temperature resistant axial flow fan, characterized in that: include: The main unit (100) comprises a casing (101), the inner wall of the casing (101) being fixedly connected to a mounting plate (102), the top of the mounting plate (102) being fixedly connected to a limiting block (103), a heat dissipation tube (104) being arranged inside the casing (101), and the top of the heat dissipation tube (104) passing through to the top of the casing (101); The ventilation unit (200) comprises a fan blade (201), wherein the fan blade (201) is driven by a motor, an outer side of the motor is provided with a heat insulating shell (202), the heat insulating shell (202) is fixedly connected to the top of a mounting plate (102), the top of the heat insulating shell (202) is fixedly connected to the bottom of a heat dissipation cylinder (104), and the back side of the heat insulating shell (202) is provided with three ventilation holes (206) arranged in a transverse direction, and the outer sides of the three ventilation holes (206) are each provided with a ventilation hole sealing assembly (207). The outer wall of the housing (101) is provided with a knob (203), a sliding rod (204) is provided below the knob (203), a rotating assembly (205) is provided on the side of the knob (203), the rotating assembly (205) passes through the limit block (103) and is rotatably connected, the rotating assembly (205) drives the ventilation hole sealing assembly (207) to rotate, and a driving assembly (208) is provided on the back of the heat-insulating housing (202), and the sliding rod (204) drives the driving assembly (208) to move vertically.

2. A high temperature resistant axial flow fan according to claim 1, characterized in that: A heat dissipation plate (104a) is fixedly connected to the bottom of the inner wall of the heat dissipation cylinder (104), and a wire mesh (104b) is arranged on the top of the heat dissipation cylinder (104), wherein the wire mesh (104b) prevents external dust from entering the interior of the heat dissipation cylinder (104).

3. A high temperature resistant axial flow fan according to claim 2, characterized in that: The outer end of the sliding rod (204) penetrates the outside of the casing (101) and is movably connected, the outer wall of the sliding rod (204) is fixedly connected with a hanging rope (204a), the outer wall of the casing (101) is fixedly connected with a fixing nail (204b), and the hanging rope (204a) is wound around the outer wall of the fixing nail (204b).

4. A high temperature resistant axial flow fan according to claim 3, characterized in that: A through slot (103a) is provided on the left side of the limit block (103); the sliding rod (204) is movably connected inside the through slot (103a); a plurality of springs (103b) are fixedly connected to the bottom of the inner wall of the through slot (103a); the top of the spring (103b) is fixedly connected to the bottom of the sliding rod (204); a limiting slot (103c) is provided on the inner wall of the through slot (103a); the inner wall of the limiting slot (103c) is movably connected to a limiting slider (103d); and the limiting slider (103d) is fixedly connected to the sliding rod (204).

5. A high temperature resistant axial flow fan according to claim 4, characterized in that: The driving assembly (208) comprises a folding bracket (208a) and three limiting slide bars (208b); the folding bracket (208a) is fixedly connected to the back of the heat-insulating shell (202); the limiting slide bar (208b) is fixedly connected to the top of the folding bracket (208a); the outer wall of the limiting slide bar (208b) is movably connected to a connecting slide bar (208c); a notch is provided at the rear bottom of the connecting slide bar (208c); a closed cover plate (208d) is fixedly connected to the side of the connecting slide bar (208c); and the closed cover plate (208d) is arranged on the back of the ventilation hole (206).

6. A high temperature resistant axial flow fan according to claim 5, characterized in that: The ventilation hole sealing assembly (207) comprises a clamping plate (207a) and a rotating block (207b), the inner wall of the clamping plate (207a) being movably connected to the outer wall of the rotating block (207b), a nut (207d) being fixedly connected to the left side of the inner wall of the clamping plate (207a), a U-shaped block (207c) being fixedly connected to the top of the clamping plate (207a), the inner wall of the U-shaped block (207c) being movably connected to a limiting rod (207e), and the side end of the limiting rod (207e) being fixedly connected to the heat insulation shell (207) via a pad. 02), the bottom of the rotating block (207b) is fixedly connected to a fixed rod (207f), the outer wall of the fixed rod (207f) is movably connected to a telescopic rod (207g), the side of the telescopic rod (207g) is fixedly connected to a clamping block (207i), the clamping block (207i) is clamped in the inside of the notch on the rear side of the connecting slider (208c), the other side of the telescopic rod (207g) is fixedly connected to a moving block (207h), and the sliding rod (204) is arranged below the moving block (207h).

7. A high temperature resistant axial flow fan according to claim 6, characterized in that: The rotating assembly (205) comprises a connecting rotating shaft (205a) and a control rotating shaft (205b), wherein the connecting rotating shaft (205a) and the control rotating shaft (205b) are connected via a coupling, the connecting rotating shaft (205a) is fixedly connected to a knob, the outer wall of the control rotating shaft (205b) is provided with three threads of equal length, and the spacing between two adjacent threads is equal to the spacing between two adjacent rotating blocks (207b), and the density of the three threads decreases in sequence, the nut (207d) is threadedly connected to the outer wall of the control rotating shaft (205b), and the rotating block (207b) is movably connected to the non-threaded portion of the outer wall of the control rotating shaft (205b).

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