A precisely controlled high-temperature heat pump unit

Abstract

The present invention discloses a precisely controlled high-temperature heat pump unit, belonging to the field of heat pumps. A precisely controlled high-temperature heat pump unit includes a condenser, a compressor, a heat exchanger, and a fan; the fan includes a frame, a fan blade rotatably connected inside the frame, and a dust-proof cover installed at the upper end of the frame for blocking the air outlet of the frame; the dust-proof cover includes a fixed ring and a plurality of blades rotatably connected to the fixed ring and arranged horizontally; the axis of rotation of the blade is perpendicular to the axis of the fixed ring; when each blade is in the horizontal position, each blade closes the air outlet of the frame. By rotating the blades, when each blade is in the horizontal position, the blade closes the air outlet of the fan, preventing foreign matters such as dust and leaves from entering the interior of the heat pump unit.

Description

Technical Field

[0001] The present invention belongs to the field of heat pumps, and more specifically, relates to a precisely controlled high-temperature heat pump unit. Background Art

[0002] Many technological processes in chemical production require heat input at a specific temperature, such as heating of reaction kettles, drying of materials, etc. A high-temperature heat pump unit can provide a stable high-temperature heat source to meet the needs of chemical production, and is more energy-saving and environmentally friendly compared to traditional heating methods such as burning coal or fuel oil.

[0003] Inside the high-temperature heat pump unit, a fan is used to dissipate heat from internal components. When the high-temperature heat pump unit is not working, the air outlet of the fan is in an open state, and foreign matters such as leaves and dust in the outside world will enter the inside of the high-temperature heat pump unit through the air outlet, affecting the normal use of the high-temperature heat pump unit. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a precisely controlled high-temperature heat pump unit, which can close the air outlet of the fan when the high-temperature heat pump unit is not working.

[0005] A precisely controlled high-temperature heat pump unit of the present invention includes a condenser, a compressor, a heat exchanger, and a fan; the fan includes a frame, a fan blade rotatably connected inside the frame, and a dust-proof cover installed at the upper end of the frame for covering the air outlet of the frame; the dust-proof cover includes a fixed ring and a plurality of blades rotatably connected to the fixed ring and arranged horizontally; the axis of rotation of the blades is perpendicular to the axis of the fixed ring; when each blade is in a horizontal position, each blade closes the air outlet of the frame.

[0006] As a further improvement of the present invention, the dust-proof cover further includes an adjusting ring coaxially rotatable with the fixed ring for driving each blade to move; when the fixed ring and the adjusting ring rotate relative to each other, the adjusting ring drives each blade to rotate; when the fixed ring and the adjusting ring rotate synchronously, the dust-proof cover rotates circumferentially.

[0007] As a further improvement of the present invention, the dust-proof cover further includes a lifting frame longitudinally slidable on the fixed ring; the blade is provided with a chute distributed radially; the lifting frame is provided with a sliding column slidably connected to the chute; the inner wall of the adjusting ring is provided with a thread groove drivingly connected to the lifting frame.

[0008] As a further improvement of the present invention, a blade slot is provided in the middle of the fan blade; an adjustment slot is provided in the middle of the adjustment ring; a high-speed motor is fixedly connected inside the frame; a screw rod is fixedly connected to the output shaft of the high-speed motor; a switching groove is provided on the outer wall of the screw rod in a spiral distribution; a sliding plug column is provided on the outer wall of the screw rod and is in driving connection with the switching groove; the cross-section of the sliding plug column, the cross-section of the blade slot, and the cross-section of the adjustment slot are the same and are all non-circular.

[0009] As a further improvement of the present invention, inclined guide walls are respectively provided at the upper and lower ends of the sliding plug column.

[0010] As a further improvement of the present invention, a fixed gear is coaxially provided on the fixed ring; a synchronous gear and an adjustment gear are coaxially provided on the adjustment ring; a switching wheel is rotatably connected inside the frame; the switching wheel includes a first gear meshing with the fixed gear, a second gear capable of meshing with the synchronous gear, and a differential gear capable of meshing with the adjustment gear; when only the second gear meshes with the synchronous gear, the adjustment ring rotates synchronously with the fixed ring; when only the differential gear meshes with the adjustment gear, the rotational speeds of the adjustment ring and the fixed ring are different.

[0011] As a further improvement of the present invention, a stepping motor is fixedly connected inside the frame; a motor gear capable of meshing with the differential gear is provided on the output shaft of the stepping motor.

[0012] As a further improvement of the present invention, a synchronous frame that longitudinally moves synchronously with the sliding plug column is longitudinally slidably connected inside the frame; when the synchronous frame is at the upper limit position, the synchronous frame separates the motor gear from the differential gear; when the synchronous frame is at the lower limit position, the synchronous frame makes the differential gear mesh with the adjustment gear.

[0013] As a further improvement of the present invention, positioning springs are respectively provided between the upper and lower ends of the synchronous frame and the frame.

[0014] As a further improvement of the present invention, a first inclined surface is provided at the upper end of the synchronous frame; a first switching frame that drives the motor gear to axially slide is slidably connected inside the frame; the first switching frame abuts against the first inclined surface; a first spring for resetting is provided between the first switching frame and the frame; a second inclined surface is provided at the lower end of the synchronous frame; a second switching frame that drives the switching wheel to axially slide is slidably connected inside the frame; the second switching frame abuts against the second inclined surface; a second spring for resetting is provided between the second switching frame and the frame.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Through the rotation of the blades, when each blade is in the horizontal position, the blades close the air outlet of the fan, preventing foreign objects such as dust and leaves from entering the interior of the heat pump unit. At the same time, through the rotation of the dust cover, the dust cover generates centrifugal force, throwing out the foreign objects at the upper end of the blade, achieving the purpose of cleaning the dust cover.

[0016] By controlling the rotation angle of the blade and the rotation angle of the dust cover, the direction of the hot air discharged by the fan can be accurately controlled. This direction should conform to the external wind direction to improve the heat dissipation efficiency. If this direction is opposite to the external wind direction, the external wind will blow the hot air back into the heat pump unit, making it difficult for the hot air in the heat pump unit to be discharged and reducing the heat dissipation efficiency.

[0017] By setting the dust cover, when the fixed ring and the adjusting ring rotate synchronously, the angle of the dust cover is adjusted. When the fixed ring and the adjusting ring rotate relatively, the rotation angle of the blade is controlled, thereby accurately controlling the direction of the hot air discharged by the fan.

[0018] Through the cooperation of the high-speed motor and the sliding plug post, when the high-speed motor rotates forward, the sliding plug post drives the dust cover to rotate quickly in the positive direction, and the centrifugal force generated by the dust cover will clean the dust cover. When the high-speed motor rotates in reverse, the sliding plug post drives the fan blades to rotate quickly in the reverse direction to dissipate heat from the heat exchanger.

[0019] And during the up and down movement of the sliding plug post, when the sliding plug post moves upward, the sliding plug post is not only used to insert into the adjustment slot to drive the adjustment ring to rotate, but also can drive the motor gear to move axially through the synchronous frame, so that the motor gear is separated from the switching wheel. During the high-speed rotation of the dust cover, the dust cover will also drive the switching wheel to rotate synchronously at high speed. By separating the motor gear from the switching wheel, the impact of the high-speed rotating switching wheel on the stepper motor is avoided.

[0020] When the sliding plug post moves downward, the sliding plug post is not only used to insert into the fan blade slot to drive the fan blade to rotate, but also can drive the switching wheel to move axially through the second switching frame, changing the state between the fixed ring and the adjusting ring, so that the fixed ring and the adjusting ring switch between synchronous rotation and relative rotation.

[0021] The high-speed motor has a fast rotation speed but cannot accurately control the rotation angle. The stepper motor cannot rotate at high speed but can accurately control its own rotation angle. This solution makes full use of the characteristics of the high-speed motor and the stepper motor, so that when the high-speed motor rotates forward, it can drive the dust cover to rotate synchronously at high speed, so that the dust cover generates centrifugal force, which is convenient for cleaning the foreign objects at the upper end of the blade. The stepper motor can also drive the dust cover to rotate so that the dust cover rotates to a specified angle, accurately controlling the heat dissipation direction of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the present invention;

[0023] Figure 2 It is a schematic cross-sectional structural diagram of the present invention;

[0024] Figure 3 It is a schematic cross-sectional structural diagram of the fan of the present invention;

[0025] Figure 4 It is a schematic cross-sectional structural diagram of the dust cover of the present invention;

[0026] Figure 5 It is a schematic installation structural diagram of the switching wheel of the present invention;

[0027] Figure 6 It is a schematic structural diagram of the present invention when the sliding plug is in the middle position;

[0028] Figure 7 It is an exploded structural diagram of the first switching frame and the second switching frame of the present invention.

[0029] Explanation of the reference numerals in the figure:

[0030] 11. Fan; 12. Heat exchanger; 13. Compressor; 14. Condenser; 21. Frame; 22. High-speed motor; 23. Screw; 231. Switching groove; 24. Fan blade; 241. Fan blade slot; 3. Dust cover; 31. Blade; 311. Slide groove; 32. Fixed ring; 321. Fixed gear; 33. Adjusting ring; 331. Adjusting connecting plate; 332. Adjusting slot; 333. Thread groove; 334. Synchronous gear; 335. Adjusting gear; 34. Lifting frame; 41. Switching wheel; 411. First gear; 412. Second gear; 413. Differential gear; 42. Motor gear; 43. Stepping motor; 51. Sliding plug; 511. Guide wall; 52. Synchronous frame; 521. First inclined surface; 522. Second inclined surface; 53. Positioning spring; 54. First switching frame; 55. Second switching frame. Specific embodiments

[0031] Specific embodiment 1: Please refer to Figures 1-7A precision-controlled high-temperature heat pump unit, characterized in that it includes a condenser 14, a compressor 13, a heat exchanger 12, and a fan 11; the fan 11 includes a frame 21, a fan blade 24 rotatably connected to the frame 21, and a dust cover 3 installed at the upper end of the frame 21 for shielding the air outlet of the frame 21; the dust cover 3 includes a fixing ring 32, a plurality of blades 31 arranged in a horizontal direction and rotatably connected to the fixing ring 32; the rotating shaft of the blade 31 is perpendicular to the axis of the fixing ring 32; when each blade 31 is in a horizontal position, each blade 31 closes the air outlet of the frame 21 to prevent external debris from entering the interior of the heat pump unit through the air outlet; when each blade 31 is tilted, the fan blade 24 can discharge the hot air on the heat exchanger 12 to the outside through the air outlet, and the direction of the discharged hot air is along the direction of the blade 31.

[0032] The rotating shaft of the fan blade 24 is arranged longitudinally; the fan 11 is directly opposite to the heat exchanger 12 .

[0033] The dust cover 3 also includes an adjusting ring 33 that rotates coaxially with the fixing ring 32 and is used to drive each blade 31 to move; when the fixing ring 32 and the adjusting ring 33 rotate relative to each other, the adjusting ring 33 drives each blade 31 to rotate; when the fixing ring 32 and the adjusting ring 33 rotate synchronously, the dust cover 3 rotates circumferentially.

[0034] The dust cover 3 also includes a lifting frame 34 that slides longitudinally on the fixing ring 32; the blade 31 is provided with a radially distributed sliding groove 311; the lifting frame 34 is provided with a sliding column that is slidably connected to the sliding groove 311; the inner wall of the adjustment ring 33 is provided with a threaded groove 333 that is transmission-connected to the lifting frame 34.

[0035] When the fixing ring 32 and the adjusting ring 33 rotate relative to each other, the lifting frame 34 will move along the thread groove 333 , and then the thread groove 333 drives the lifting frame 34 to slide longitudinally. The lifting frame 34 drives all the blades 31 to rotate through the cooperation between the sliding column and the sliding groove 311 .

[0036] A blade slot 241 is provided in the middle of the blade 24; an adjustment slot 332 is provided in the middle of the adjustment ring 33; a high-speed motor 22 is fixedly connected to the frame 21; a screw 23 is fixedly connected to the output shaft of the high-speed motor 22; a switching slot 231 distributed in a spiral shape is provided on the outer wall of the screw 23; a sliding column 51 transmission-connected to the switching slot 231 is provided on the outer wall of the screw 23; the cross-section of the sliding column 51, the cross-section of the blade slot 241, and the cross-section of the adjustment slot 332 are the same, and are all non-circular.

[0037] The adjusting ring 33 is provided with adjusting connecting plates 331 distributed along the radial direction; the adjusting slots 332 are provided on the adjusting connecting plates 331 .

[0038] When the high-speed motor 22 rotates forward, due to inertia, the sliding plug post 51 does not rotate while the screw rod 23 rotates, causing the screw rod 23 to drive the sliding plug post 51 to move upward to the upper limit position of the switching slot 231. The sliding plug post 51 is inserted into the adjustment slot 332, and then the screw rod 23 drives the sliding plug post 51 to rotate forward synchronously.

[0039] When the high-speed motor 22 rotates reversely, the screw rod 23 first drives the sliding plug post 51 to move downward to the lower limit position of the switching slot 231. The sliding plug post 51 is inserted into the fan blade slot 241, and then the screw rod 23 drives the sliding plug post 51 and the fan blade 24 to rotate reversely synchronously.

[0040] The upper and lower ends of the sliding plug post 51 are respectively provided with inclined guide walls 511; the guide walls 511 facilitate the insertion of the sliding plug post 51 into the fan blade slot 241 and the adjustment slot 332.

[0041] A fixed gear 321 is coaxially arranged on the fixed ring 32; a synchronous gear 334 and an adjustment gear 335 are coaxially arranged on the adjustment ring 33; a switching wheel 41 is rotatably connected in the frame 21; the switching wheel 41 includes a first gear 411 meshing with the fixed gear 321, a second gear 412 capable of meshing with the synchronous gear 334, and a differential gear 413 capable of meshing with the adjustment gear 335; when only the second gear 412 meshes with the synchronous gear 334, the adjustment ring 33 rotates synchronously with the fixed ring 32; when only the differential gear 413 meshes with the adjustment gear 335, the rotational speeds of the adjustment ring 33 and the fixed ring 32 are different. During the above process, the fixed gear 321 always meshes with the first gear 411.

[0042] The first gear 411 and the second gear 412 have the same number of teeth; the differential gear 413 and the second gear 412 have different numbers of teeth. The fixed gear 321 and the synchronous gear 334 have the same number of teeth. Furthermore, the transmission ratio between the second gear 412 and the synchronous gear 334 is different from the transmission ratio between the differential gear 413 and the adjustment gear 335. Thus, when only the differential gear 413 meshes with the adjustment gear 335, the rotational speeds of the adjustment ring 33 and the fixed ring 32 are different, and the adjustment ring 33 rotates relative to the fixed ring 32.

[0043] A stepping motor 43 is fixedly connected in the frame 21; a motor gear 42 capable of meshing with the differential gear 413 is arranged on the output shaft of the stepping motor 43.

[0044] A synchronous frame 52 longitudinally slidably connected with the sliding plug post 51 is longitudinally slidably connected in the frame 21; when the synchronous frame 52 is at the upper limit position, the synchronous frame 52 separates the motor gear 42 from the differential gear 413; when the synchronous frame 52 is at the lower limit position, the synchronous frame 52 makes the differential gear 413 mesh with the adjustment gear 335.

[0045] Positioning springs 53 are respectively arranged between the upper and lower ends of the synchronization frame 52 and the frame 21. When the high-speed motor 22 is not working, the positioning springs 53 keep the synchronization frame 52 and the sliding plug 51 in the middle position, and at this time, the sliding plug 51 does not contact the fan blade slot 241 and the adjustment slot 332.

[0046] The upper end of the synchronization frame 52 is provided with a first inclined surface 521 distributed obliquely. A first switching frame 54 for driving the motor gear 42 to axially slide is slidably connected in the frame 21. The first switching frame 54 abuts against the first inclined surface 521. A first spring for resetting is arranged between the first switching frame 54 and the frame 21. The lower end of the synchronization frame 52 is provided with a second inclined surface 522 distributed obliquely. A second switching frame 55 for driving the switching wheel 41 to axially slide is slidably connected in the frame 21. The second switching frame 55 abuts against the second inclined surface 522. A second spring for resetting is arranged between the second switching frame 55 and the frame 21.

[0047] The first switching frame 54 and the motor gear 42 move axially synchronously and rotate relatively circumferentially. The second switching frame 55 and the switching wheel 41 move axially synchronously and rotate relatively circumferentially.

[0048] In the initial state, each blade 31 is in the horizontal position, closing the air outlet of the fan 11. The sliding plug 51 is in the middle position. The second gear 412 meshes with the synchronization gear 334, and the motor gear 42 meshes with the differential gear 413.

[0049] Before use, the high-speed motor 22 rotates forward. The screw 23 first drives the sliding plug 51 to move upward, so that the sliding plug 51 is inserted into the adjustment slot 332. At the same time, as the sliding plug 51 moves upward, the synchronization frame 52 moves upward together. The first inclined surface 521 abuts against the first switching frame 54, and the first switching frame 54 drives the motor gear 42 to move, so that the motor gear 42 does not mesh with the differential gear 413. Then the high-speed motor 22 continues to rotate forward. The sliding plug 51 drives the adjustment ring 33 to rotate synchronously, and at this time, the second gear 412 meshes with the synchronization gear 334, so that the adjustment ring 33 and the fixed ring 32 rotate synchronously. Finally, the sliding plug 51 drives the dust cover 3 to rotate forward as a whole, and the sundries on the blades 31 will be thrown out under the action of centrifugal force. After a certain period of time, the high-speed motor 22 stops working. The sliding plug 51 and the synchronization frame 52 move to the middle position under the action of the positioning spring 53, the first switching frame 54 and the motor gear 42 are reset, and the motor gear 42 meshes with the differential gear 413 again.

[0050] The high-speed motor 22 drives the screw 23 to rotate in the reverse direction. The sliding plunger 51 moves downward and is inserted into the fan blade slot 241. At the same time, as the sliding plunger 51 moves downward, the synchronization frame 52 moves downward together. The second inclined surface 522 abuts against the second switching frame 55 and drives the second switching frame 55 to slide. The second switching frame 55 drives the switching wheel 41 to move axially, causing the second gear 412 to disengage from the synchronization gear 334 and the differential gear 413 to mesh with the adjustment gear 335.

[0051] After that, the high-speed motor 22 will drive the fan blade 24 to rotate continuously. Then the stepping motor 43 operates, driving the switching wheel 41 to rotate through the motor gear 42. Since the differential gear 413 meshes with the adjustment gear 335 at this time, the rotation speeds of the adjustment ring 33 and the fixed ring 32 are different, resulting in relative rotation. The lifting frame 34 will move along the thread groove 333, and the lifting frame 34 gradually moves upward. The lifting frame 34 drives each blade 31 to rotate upward, and thus the air outlet of the air blower 11 communicates with the outside. When the blade 31 rotates to the specified angle, the stepping motor 43 stops operating.

[0052] At this time, if the angle of the dust-proof cover 3 needs to be adjusted, the high-speed motor 22 is controlled to stop operating. The sliding plunger 51 and the synchronization frame 52 move to the middle position. The second gear 412 meshes with the synchronization gear 334. Then the stepping motor 43 operates, and the motor gear 42 drives the switching wheel 41 to rotate. Furthermore, the stepping motor 43 will drive the dust-proof cover 3 to rotate slowly, so that the dust-proof cover 3 rotates to the specified angle according to the outside wind direction. Thus, the angle adjustment of the dust-proof cover 3 and the blade 31 is completed.

[0053] Then the high-speed motor 22 operates in the reverse direction, and the high-speed motor 22 continuously drives the fan blade 24 to rotate, exhausting the hot air in the heat pump unit.

[0054] When the work is completed and the blade 31 needs to close the air outlet of the air blower 11 again, the high-speed motor 22 operates in the reverse direction. The stepping motor 43 drives the switching wheel 41 to rotate. The switching wheel 41 drives the fixed ring 32 and the adjustment ring 33 to rotate relative to each other, causing the lifting frame 34 to gradually move downward until each blade 31 closes the air outlet of the air blower 11. Then the high-speed motor 22 and the stepping motor 43 stop operating.

Claims

1. A precisely controlled high-temperature heat pump unit, characterized in that: It includes a condenser, a compressor, a heat exchanger, and a fan; the fan includes a frame, a fan blade rotatably connected inside the frame, and a dust-proof cover installed at the upper end of the frame for covering the air outlet of the frame; the dust-proof cover includes a fixed ring and a plurality of blades rotatably connected to the fixed ring and arranged horizontally; the axis of the rotation shaft of the blade is perpendicular to the axis of the fixed ring; when each blade is in the horizontal position, each blade closes the air outlet of the frame; The dust-proof cover further includes an adjustment ring coaxially rotatable with the fixed ring for driving the movement of each blade; when the fixed ring and the adjustment ring rotate relative to each other, the adjustment ring drives each blade to rotate; when the fixed ring and the adjustment ring rotate synchronously, the dust-proof cover rotates circumferentially; The dust-proof cover further includes a lifting frame longitudinally sliding on the fixed ring; the blade is provided with a chute distributed radially; the lifting frame is provided with a sliding column slidably connected to the chute; the inner wall of the adjustment ring is provided with a thread groove in transmission connection with the lifting frame.

2. The fine-controlled high-temperature heat pump unit according to claim 1, wherein: A fan blade slot is provided in the middle of the fan blade; an adjustment slot is provided in the middle of the adjustment ring; a high-speed motor is fixedly connected inside the frame; a screw rod is fixedly connected to the output shaft of the high-speed motor; a switching groove distributed in a spiral line is provided on the outer wall of the screw rod; a sliding plug column in transmission connection with the switching groove is provided on the outer wall of the screw rod; the cross-section of the sliding plug column, the cross-section of the fan blade slot, and the cross-section of the adjustment slot are the same and are all non-circular.

3. The precision-controlled high-temperature heat pump unit according to claim 2, wherein: Inclined guide walls are respectively provided at the upper and lower ends of the sliding plug column.

4. The fine-controlled high-temperature heat pump unit according to claim 2, wherein: A fixed gear is coaxially provided on the fixed ring; a synchronous gear and an adjustment gear are coaxially provided on the adjustment ring; a switching wheel is rotatably connected inside the frame; the switching wheel includes a first gear meshing with the fixed gear, a second gear capable of meshing with the synchronous gear, and a differential gear capable of meshing with the adjustment gear; when only the second gear meshes with the synchronous gear, the adjustment ring and the fixed ring rotate synchronously; when only the differential gear meshes with the adjustment gear, the rotational speeds of the adjustment ring and the fixed ring are different.

5. The fine-controlled high-temperature heat pump unit according to claim 4, wherein: A stepping motor is fixedly connected inside the frame; a motor gear capable of meshing with the differential gear is provided on the output shaft of the stepping motor.

6. The fine-controlled high-temperature heat pump unit according to claim 5, wherein: A synchronous frame longitudinally slidably connected with the sliding plug column is longitudinally slidably connected inside the frame; when the synchronous frame is at the upper limit position, the synchronous frame separates the motor gear from the differential gear; when the synchronous frame is at the lower limit position, the synchronous frame makes the differential gear mesh with the adjustment gear.

7. The fine-control type high-temperature heat pump unit according to claim 6, characterized in that: Positioning springs are respectively provided between the upper and lower ends of the synchronous frame and the frame.

8. The fine-control type high-temperature heat pump unit according to claim 6, characterized in that: An inclined first inclined surface is provided at the upper end of the synchronous frame; a first switching frame for driving the axial sliding of the motor gear is slidably connected inside the frame; the first switching frame abuts against the first inclined surface; a first spring for resetting is provided between the first switching frame and the frame; an inclined second inclined surface is provided at the lower end of the synchronous frame; a second switching frame for driving the axial sliding of the switching wheel is slidably connected inside the frame; the second switching frame abuts against the second inclined surface; a second spring for resetting is provided between the second switching frame and the frame.

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