A PTC heater for preventing the heat sink from falling off

Abstract

The present invention relates to the technical field of heaters, and specifically relates to a PTC heater for preventing the fins from falling off. The fins are spirally bonded to the outer wall of the heating tube. The heating tube is installed inside the bracket. The first fixing mechanism is a spiral structure. The second fixing mechanism has the same structure as the first fixing mechanism. Two chutes are respectively opened on the first fixing mechanism and the second fixing mechanism. The driving device is sleeved on the outside of the heating tube and is driven by a first screw rod and a second screw rod. The driving motor is installed on the outer wall surface of the bracket. One end of the reset device is installed in the chute, and one end of the reset device is connected to the driving device. By the oppositely arranged first fixing mechanism and second fixing mechanism, the fins are clamped, which can strengthen the fixing effect of the fins. At the same time, it can avoid the problem of the fins falling off caused by external impacts and other factors. The position of the deformed fins can be reset without disassembling the heating tube, simplifying the maintenance process.

Description

Technical Field

[0001] The present invention relates to the technical field of heaters, and particularly to a PTC heater for preventing the fins from falling off. Background Art

[0002] The PTC heating element, also known as the PTC heater, is composed of a PTC ceramic heating element and an aluminum tube. This type of PTC heating element has the advantages of small thermal resistance and high heat transfer efficiency, and is an automatic constant temperature and power-saving electric heater. Its outstanding feature lies in its safety performance. Under any application conditions, it will not produce the surface "reddening" phenomenon of heaters such as electric heating tubes, thus causing safety hazards such as scalding and fire.

[0003] At present, the fins and the heating tube of the PTC heaters on the market are fixed by bonding. In a high-temperature environment, long-term use is likely to cause degumming, which has safety hazards. At the same time, the fins are extremely easy to deform under external force factors such as impact, resulting in poor heat dissipation. Currently, repairing the deformed fins requires disassembling the heater and repairing the fins, which is a cumbersome process and wastes labor. Summary of the Invention

[0004] The purpose of the present invention is to provide a PTC heater for preventing the fins from falling off, so as to solve the problems raised in the above background art that the simple bonding connection method between the fins and the heating tube has poor fixing effect, is not conducive to long-term use, and the repair method for the deformed fins is cumbersome.

[0005] To achieve the above object, the present invention provides the following technical solution. A PTC heater for preventing the heat sink from falling off, comprising: a heating tube, a heat sink, a bracket, a first fixing mechanism, a second fixing mechanism, a chute, a first auxiliary ring, a second auxiliary ring, a fixing ring, a first screw, a second screw, a driving device, a driving motor, and a reset device. Threads are provided at both ends of the outer wall of the heating tube in a circular shape. The heat sink is spirally bonded to the outer wall of the heating tube. The bracket has a concave structure. The heating tube is installed inside the bracket. The first fixing mechanism is in a spiral structure and wound around the outer wall of the heating tube. The second fixing mechanism has the same structure as the first fixing mechanism and is wound around the outer wall of the heating tube. The number of the chutes is two, and the two chutes are respectively provided on the first fixing mechanism and the second fixing mechanism and on the opposite wall surfaces of the first fixing mechanism and the second fixing mechanism. The first auxiliary ring is installed at one end of the first fixing mechanism. The second auxiliary ring is installed at one end of the second fixing mechanism, and the first auxiliary ring and the second auxiliary ring are respectively located at both ends of the heating tube. The number of the fixing rings is two, and the two fixing rings are respectively screwed to both ends of the heating tube. The first screw is installed on the bracket, and the extending direction of the first screw is parallel to the heating tube. One end of the first screw extends out of the outside of the bracket. The second screw is installed on the bracket and is parallel to the first screw. The second screw and the first screw are circularly distributed and located on the same rotation axis. The driving device is sleeved on the outside of the heating tube and is driven and limited by the first screw and the second screw. The driving motor is installed on the outer wall surface of the bracket, and the driving end of the driving motor is connected to the first screw. One end of the reset device is installed in the chute, and one end of the reset device is connected to the driving device.

[0006] Preferably, there is an activity space for the reset device between the first fixing mechanism and the second fixing mechanism. Both the first fixing mechanism and the second fixing mechanism are located in the gaps of the spiral heat sink, and the total width of the first fixing mechanism and the second fixing mechanism is less than the width of the heat sink gap.

[0007] Preferably, the driving device can drive the reset device to rotate and move along the direction of the heat sink. The driving device includes: a housing, a first ear plate, a second ear plate, a transmission ring, a transmission wheel. The housing is in a circular structure. The housing is located outside the heating tube. A placement groove is provided on the circular inner wall surface of the housing. The first ear plate is installed on the circular outer wall of the housing and screwed to the outside of the first screw. The second ear plate is installed on the outer wall of the housing and adjacent to the first ear plate. The second ear plate is sleeved on the outside of the second screw. The transmission ring is arranged in the placement groove, and threads are provided on the circular outer wall of the transmission ring. A spherical groove is provided on the circular inner wall of the transmission ring. The transmission wheel is rotatably installed in the inner cavity of the second ear plate and meshes with the transmission ring and the second screw.

[0008] Preferably, the use of a split housing facilitates the assembly of components. The outer housing is composed of a first housing and a second housing. The first housing and the second housing are mirror-distributed and fixed by bolts. The first ear plate includes a first part of the first ear plate and a second part of the first ear plate. The second ear plate includes a first part of the second ear plate and a second part of the second ear plate, and they respectively correspond to the first housing and the second housing. A transmission groove is provided between the first part of the first ear plate and the second part of the first ear plate. The transmission wheel is rotatably installed in the transmission groove to transmit power between the transmission ring and the second screw.

[0009] Preferably, support wheels are equally angularly distributed on two side walls in the axial direction of the outer housing. The outer wall of the support wheel extends into the inner cavity of the outer housing, and the outer wall of the support wheel abuts against the outer wall of the transmission ring.

[0010] Preferably, the cross-sectional shape of the transmission ring is a trapezoidal structure, and the cross-sectional width gradually decreases along the radial direction of the transmission ring.

[0011] Preferably, when the reset device is driven by the power device, the deformation of the heat sink can be reset. The reset device includes: a connecting rod, a main rod, a ball head, a fixing member, a reset roller, a limiting ring, and a reed. The two ends of the connecting rod are respectively located in the sliding grooves of the first fixing mechanism and the second fixing mechanism. The bottom end of the main rod is arranged on the outer wall of the connecting rod to form a T-shaped structure. The ball head is arranged at the top end of the main rod. The ball head is located in the spherical groove. The fixing member is sleeved on the outer wall of the main rod and fixed on the annular inner wall of the transmission ring. The reset roller is rotatably installed on the outside of the main rod. The number of limiting rings is two, and the two reset rings are respectively sleeved on the two ends of the connecting rod. The reed is installed between the two limiting rings.

[0012] Preferably, during the movement of the reset roller, the deformation of the heat sink can be reset. The diameter of the reset roller matches the distance of the gap between the heat sinks.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: The PCT heater for preventing the heat sink from falling off clamps the heat sink through the oppositely arranged first fixing mechanism and second fixing mechanism, which can enhance the fixing effect of the heat sink and avoid the problem of the heat sink falling off caused by external impacts and other factors. At the same time, in cooperation with the power device and the reset device, the position of the deformed heat sink can be reset without disassembling the heating tube, simplifying the maintenance process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present invention;

[0015] Figure 2 is a partial schematic diagram of the present invention;

[0016] Figure 3Schematic diagram of the reset device of the present invention;

[0017] Figure 4 Explosion schematic diagram of the power device of the present invention;

[0018] Figure 5 Cross-sectional view of the housing of the present invention;

[0019] Figure 6 Front view of the power device of the present invention;

[0020] Figure 7 Front view of the support wheel of the present invention.

[0021] In the figure: 1, heating tube; 2, heat sink; 3, bracket; 4, first fixing mechanism; 5, second fixing mechanism; 6, chute; 7, first auxiliary ring; 8, second auxiliary ring; 9, fixing ring; 10, first screw; 11, second screw; 12, driving device; 121, housing; 122, placement groove; 123, first ear plate; 124, second ear plate; 125, transmission ring; 126, spherical groove; 127, transmission wheel; 128, transmission groove; 129, support wheel; 13, driving motor; 14, reset device; 141, connecting rod; 142, main rod; 143, ball head; 144, fixing member; 145, reset roller; 146, limiting ring; 147, reed. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figure 1-7 , the present invention provides a technical solution of a PTC heater for preventing the heat sink from falling off.

[0024] The detailed connection means are well-known techniques in the art. The following mainly introduces the working principle and process, and the specific work is as follows.

[0025] A PTC heater for preventing the heat sink 2 from falling off, comprising: a heating tube 1, a heat sink 2, a bracket 3, a first fixing mechanism 4, a second fixing mechanism 5, a chute 6, a first auxiliary ring 7, a second auxiliary ring 8, a fixing ring 9, a first screw 10, a second screw 11, a driving device 12, a driving motor 13, a reset device 14. Threads are provided at both ends of the outer wall of the annular heating tube 1. The heat sink 2 is spirally bonded to the outer wall of the heating tube 1. The bracket 3 is of a concave structure. The heating tube 1 is installed inside the bracket 3, and it can be installed at the required position through the bracket 3. The first fixing mechanism 4 is of a spiral structure and wound around the outer wall of the heating tube 1. The second fixing mechanism 5 has the same structure as the first fixing mechanism 4 and is wound around the outer wall of the heating tube 1. The contact surfaces of the first fixing mechanism 4 and the second fixing mechanism 5 with the heat sink 2 are rough planes to increase the friction when contacting. The number of chutes 6 is two, and the two chutes 6 are respectively opened on the first fixing mechanism 4 and the second fixing mechanism 5, and are opened on the opposite wall surfaces of the first fixing mechanism 4 and the second fixing mechanism 5. The first auxiliary ring 7 is installed at one end of the first fixing mechanism 4. The second auxiliary ring 8 is installed at one end of the second fixing mechanism 5, and the first auxiliary ring 7 and the second auxiliary ring 8 are respectively located at both ends of the heating tube 1. The number of fixing rings 9 is two, and the two fixing rings 9 are respectively screwed to both ends of the heating tube 1. The first screw 10 is installed on the bracket 3, and the extending direction of the first screw 10 is parallel to the heating tube 1. One end of the first screw 10 extends out of the outside of the bracket 3. The second screw 11 is installed on the bracket 3 and is parallel to the first screw 10. The second screw 11 and the first screw 10 are circularly distributed and located on the same rotation axis. The driving device 12 is sleeved on the outside of the heating tube 1 and is driven and limited by the first screw 10 and the second screw 11. The driving motor 13 is installed on the outer wall surface of the bracket 3, and the driving end of the driving motor 13 is connected to the first screw 10. One end of the reset device 14 is installed in the chute 6, and one end of the reset device 14 is connected to the driving device 12.

[0026] There is an activity space for the reset device 14 between the first fixing mechanism 4 and the second fixing mechanism 5. Both the first fixing mechanism 4 and the second fixing mechanism 5 are located in the gaps of the spiral heat sink 2, and the total width of the first fixing mechanism 4 and the second fixing mechanism 5 is less than the width of the gaps of the heat sink 2.

[0027] The driving device 12 can drive the reset device 14 to rotate and move along the direction of the heat sink 2. The driving device 12 includes: a housing 121, a first ear plate 123, a second ear plate 124, a transmission ring 125, and a transmission wheel 127. The housing 121 is of an annular structure and is located outside the heating tube 1. A placement groove 122 is formed on the annular inner wall surface of the housing 121. The first ear plate 123 is installed on the annular outer wall of the housing 121 and is screwed outside the first screw rod 10. The second ear plate 124 is installed on the outer wall of the housing 121 and is adjacent to the first ear plate 123. The second ear plate 124 is sleeved outside the second screw rod 11. The transmission ring 125 is arranged in the placement groove 122, and a thread is formed on the annular outer wall of the transmission ring 125. A spherical groove 126 is formed on the annular inner wall of the transmission ring 125. The transmission wheel 127 is rotatably installed in the inner cavity of the second ear plate 124 and meshes with the transmission ring 125 and the second screw rod 11.

[0028] The use of a split housing facilitates the assembly of components. The housing 121 is composed of a first housing and a second housing. The first housing and the second housing are mirror - distributed and are fixed by bolts. The first ear plate 123 includes a first part 123 - 1 and a second part 123 - 2 of the first ear plate. The second ear plate 124 includes a first part 124 - 1 and a second part 124 - 2 of the second ear plate, and they respectively correspond to the first housing and the second housing. A transmission groove 128 is formed between the first part 123 - 1 and the second part 123 - 2 of the first ear plate 123. The transmission wheel 127 is rotatably installed in the transmission groove 128 to transmit power between the transmission ring 125 and the second screw rod 11.

[0029] Support wheels 129 are equally - angularly distributed on the two side walls of the housing 121 in the axial direction. The outer wall of the support wheel 129 extends into the inner cavity of the housing 121, and the outer wall of the support wheel 129 abuts against the outer wall of the transmission ring 125.

[0030] The cross - sectional shape of the transmission ring 125 is a trapezoidal structure, and the cross - sectional width gradually becomes smaller along the radial direction of the transmission ring 125. The trapezoidal cross - sectional transmission ring 125 and the inclined support wheels 129 can provide a stable supporting force for the transmission ring 125 to ensure the smooth rotation of the transmission ring 125 and ensure that the rotation axis of the transmission ring 125 is collinear with the axis of the housing 121.

[0031] When the reset device 14 is driven by the power device, the deformation of the heat sink 2 can be reset. The reset device 14 includes: a connecting rod 141, a main rod 142, a ball head 143, a fixing member 144, a reset roller 145, a limiting ring 146, and a reed 147. Both ends of the connecting rod 141 are respectively located in the sliding grooves 6 of the first fixing mechanism 4 and the second fixing mechanism 5. The bottom end of the main rod 142 is arranged on the outer wall of the connecting rod 141 to form a T-shaped structure. The ball head 143 is arranged at the top end of the main rod 142, and the ball head 143 is located in the spherical groove 126 to ensure that the reset device 14 can meet the movement angle between the main rod 142 and the transmission ring 125 under the drive of the power device. The fixing member 144 is sleeved on the outer wall of the main rod 142 and fixed on the annular inner wall of the transmission ring 125. The reset roller 145 is rotatably installed on the outside of the main rod 142. The number of the limiting rings 146 is two, and the two reset rings are respectively sleeved on both ends of the connecting rod 141. The reed 147 is installed between the two limiting rings 146. The combined use of the reset rings and the reed 147 makes the reset rings respectively abut against the first fixing mechanism 4 and the second fixing mechanism 5, so that when the connecting rod 141 moves along the sliding groove 6, both ends of the connecting rod 141 are always located in the sliding groove 6.

[0032] Ensure that during the movement of the reset roller 145, the deformation of the heat sink 2 is reset. The diameter of the reset roller 145 is matched with the distance of the gap between the heat sink 2.

[0033] Embodiment:

[0034] First, rotate and wind the first fixing mechanism 4 and the second fixing mechanism 5 along the heat sink 2 onto the outer wall of the heating pipe 1, and push them towards each other so that the first fixing mechanism 4 and the second fixing mechanism 5 are in close contact with the heat sink 2. At this time, both of them will provide a clamping force on the heat sink 2, and the first fixing mechanism 4 and the second fixing mechanism 5 are fixed by the fixing rings 9 screwed at both ends of the heating pipe 1. At this time, the heat sink 2 will be provided with a clamping force by the first fixing mechanism 4 and the second fixing mechanism 5, which can prevent the heat sink 2 from falling off due to external collisions and other factors. At the same time, under the cooperation of the first screw rod 10 and the second screw rod 11, the outer shell 121 can move along the extension direction of the heating pipe 1. The driving motor 13 drives the first screw rod 10 to rotate, and the first screw rod 10 cooperates with the first ear plate 123 to drive the outer shell 121. During the movement of the outer shell 121, the transmission ring 125 is driven by the second screw rod 11 to rotate in the inner cavity of the outer shell 121 under the cooperation of the transmission wheel 127. At this time, the transmission ring 125 will drive the reset device 14 to perform a circular motion. At the same time, in cooperation with the movement of the outer shell 121, the reset device 14 can displace during the rotation process to ensure that the movement trajectory of the reset device 14 matches the gap of the heat sink 2. During the displacement of the reset device 14, the reset roller 145 will support and reset the deformed heat sink 2 to ensure the good heat dissipation effect of the heat sink 2. The heat sink 2 can be repaired without disassembling the heating pipe 1, which simplifies the maintenance process.

[0035] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PTC heater for preventing the heat sink from falling off, characterized in that, Including: A heating pipe (1), both ends of the outer wall of the annular heating pipe (1) are provided with threads; A heat sink (2), the heat sink (2) is spirally bonded to the outer wall of the heating pipe (1); A bracket (3), the bracket (3) has a concave structure, and the heating pipe (1) is installed inside the bracket (3); A first fixing mechanism (4), the first fixing mechanism (4) has a spiral structure and is wound around the outer wall of the heating pipe (1); A second fixing mechanism (5), the second fixing mechanism (5) has the same structure as the first fixing mechanism (4) and is wound around the outer wall of the heating pipe (1); Chute (6), the number of chutes (6) is two, and the two chutes (6) are respectively opened on the first fixing mechanism (4) and the second fixing mechanism (5), and are opened on the opposite wall surfaces of the first fixing mechanism (4) and the second fixing mechanism (5); A first auxiliary ring (7), the first auxiliary ring (7) is installed at one end of the first fixing mechanism (4); A second auxiliary ring (8), the second auxiliary ring (8) is installed at one end of the second fixing mechanism (5), and the first auxiliary ring (7) and the second auxiliary ring (8) are respectively located at both ends of the heating pipe (1); Fixing rings (9), the number of fixing rings (9) is two, and the two fixing rings (9) are respectively screwed to both ends of the heating pipe (1); A first screw rod (10), the first screw rod (10) is installed on the bracket (3), and the extending direction of the first screw rod (10) is parallel to the heating pipe (1), and one end of the first screw rod (10) extends out of the outside of the bracket (3), A second screw rod (11), the second screw rod (11) is installed on the bracket (3) and is parallel to the first screw rod (10), the second screw rod (11) and the first screw rod (10) are circularly distributed and are located on the same rotation axis; A driving device (12), the driving device (12) is sleeved on the outside of the heating pipe (1), and is driven and limited by the first screw rod (10) and the second screw rod (11); A driving motor (13), the driving motor (13) is installed on the outer wall surface of the bracket (3), and the driving end of the driving motor (13) is connected to the first screw rod (10); A reset device (14), one end of the reset device (14) is installed in the chute (6), and one end of the reset device (14) is connected to the driving device (12).

2. The PTC heater for preventing the heat sink from falling off according to claim 1, wherein: Both the first fixing mechanism (4) and the second fixing mechanism (5) are located in the gaps of the spiral heat sink (2), and the total width of the first fixing mechanism (4) and the second fixing mechanism (5) is less than the width of the gap of the heat sink (2).

3. The PTC heater for preventing the heat sink from falling off according to claim 1, characterized in that, The driving device (12) includes: A housing (121), the housing (121) has an annular structure, the housing (121) is located outside the heating pipe (1), and a placement groove (122) is opened on the annular inner wall surface of the housing (121); A first ear plate (123), the first ear plate (123) is installed on the annular outer wall of the housing (121) and is screwed to the outside of the first screw rod (10); The second ear plate (124) is installed on the outer wall of the housing (121) and adjacent to the first ear plate (123), and the second ear plate (124) is sleeved outside the second screw rod (11). The transmission ring (125) is arranged in the placement groove (122), and threads are provided on the annular outer wall of the transmission ring (125), and a spherical groove (126) is provided on the annular inner wall of the transmission ring (125). The transmission wheel (127) is rotatably installed in the inner cavity of the second ear plate (124) and meshes with the transmission ring (125) and the second screw rod (11).

4. The PTC heater for preventing the heat sink from falling off according to claim 3, characterized in that: The housing (121) is composed of a first housing and a second housing. The first housing and the second housing are mirror-distributed and fixed by bolts. The first ear plate (123) includes a first part of the first ear plate (123) and a second part of the first ear plate (123). The second ear plate (124) includes a first part of the second ear plate (124) and a second part of the second ear plate (124), and respectively corresponds to the first housing and the second housing. A transmission groove (128) is provided between the first part of the first ear plate (123) and the second part of the first ear plate (123). The transmission wheel (127) is rotatably installed in the transmission groove (128) to transmit between the transmission ring (125) and the second screw rod (11).

5. The PTC heater for preventing the heat sink from falling off according to claim 3, characterized in that: Support wheels (129) are equiangularly distributed on the two side walls in the axial direction of the housing (121). The outer walls of the support wheels (129) extend into the inner cavity of the housing (121), and the outer walls of the support wheels (129) are in contact with the outer wall of the transmission ring (125).

6. A PTC heater for preventing a heat sink from falling off according to claim 5, characterized in that: The cross-sectional shape of the transmission ring (125) is a trapezoidal structure, and the cross-sectional width gradually becomes smaller along the radial direction of the transmission ring (125).

7. A PTC heater for preventing the heat sink from falling off according to claim 3, characterized in that, The reset device (14) includes: A connecting rod (141), and both ends of the connecting rod (141) are respectively located in the sliding grooves (6) of the first fixing mechanism (4) and the second fixing mechanism (5). A main rod (142), and the bottom end of the main rod (142) is arranged on the outer wall of the connecting rod (141) to form a T-shaped structure. A ball head (143), and the ball head (143) is arranged at the top end of the main rod (142), and the ball head (143) is located in the spherical groove (126). A fixing piece (144), and the fixing piece (144) is sleeved on the outer wall of the main rod (142) and fixed on the annular inner wall of the transmission ring (125). A reset roller (145), and the reset roller (145) is rotatably installed outside the main rod (142). Limit rings (146), and the number of the limit rings (146) is two. The two reset rings are respectively sleeved on both ends of the connecting rod (141). A reed (147), and the reed (147) is installed between the two limit rings (146).

8. The PTC heater for preventing the heat sink from falling off according to claim 7, wherein: The diameter of the reset roller (145) matches the distance of the gap between the heat dissipation fins (2).

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