Precise control type high-temperature heat pump unit

Abstract

The invention discloses a precise control type high-temperature heat pump unit, and belongs to the field of heat pumps. A precise control type high-temperature heat pump unit comprises a condenser, a compressor, a heat exchanger and a fan. The fan comprises a rack, fan blades rotationally connected into the rack and a dust cover installed at the upper end of the rack and used for shielding an air outlet of the rack. The dust cover comprises a fixing ring and a plurality of blades which are arranged in the horizontal direction and rotationally connected with the fixing ring. Rotating shafts of the blades are perpendicular to the axis of the fixing ring; and when each blade is in a horizontal position, each blade seals the air outlet of the rack. According to the scheme, through rotation of the blades, when the blades are located at the horizontal position, the blades seal the air outlet of the draught fan, and foreign materials such as external dust and leaves are prevented from entering the heat pump unit.

Description

Technical Field

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

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

[0003] In the high-temperature heat pump unit, the fan is used to dissipate heat from the internal components. When the high-temperature heat pump unit is not working, the fan outlet is open, and the leaves, sand and other debris from the outside will enter the high-temperature heat pump unit through the 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 precision-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 precision-controlled high-temperature heat pump unit of the present invention comprises a condenser, a compressor, a heat exchanger and a fan; the fan comprises a frame, fan blades rotatably connected to the frame, and a dust cover installed at the upper end of the frame for shielding the air outlet of the frame; the dust cover comprises a fixing ring and a plurality of blades rotatably connected to the fixing ring and arranged in a horizontal direction; the rotating shaft of the blade is perpendicular to the axis of the fixing 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 cover also includes an adjusting ring that rotates coaxially with the fixing ring and is used to drive the movement of each blade; when the fixing ring and the adjusting ring rotate relative to each other, the adjusting ring drives the rotation of each blade; when the fixing ring and the adjusting ring rotate synchronously, the dust cover rotates circumferentially.

[0007] As a further improvement of the present invention, the dust cover also includes a lifting frame that slides longitudinally on the fixed ring; the blade is provided with a radially distributed sliding groove; the lifting frame is provided with a sliding column that is slidably connected to the sliding groove; the inner wall of the adjustment ring is provided with a threaded groove that is transmission-connected to the lifting frame.

[0008] As a further improvement of the present invention, 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 in the frame; a screw is fixedly connected to the output shaft of the high-speed motor; a switching slot distributed in a spiral shape is provided on the outer wall of the screw; a sliding column transmission-connected to the switching slot is provided on the outer wall of the screw; the cross-section of the sliding 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.

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

[0010] As a further improvement of the present invention, a fixed gear is coaxially arranged on the fixed ring; a synchronous gear and an adjusting gear are coaxially arranged on the adjusting ring; a switching wheel is rotatably connected in 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 adjusting gear; when only the second gear is meshing with the synchronous gear, the adjusting ring rotates synchronously with the fixed ring; when only the differential gear is meshing with the adjusting gear, the rotation speeds of the adjusting ring and the fixed ring are different.

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

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

[0013] As a further improvement of the present invention, positioning springs are respectively arranged 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 arranged at an inclined distribution on the upper end of the synchronous frame; a first switching frame is slidably connected in the frame and drives the motor gear to slide axially; the first switching frame abuts against the first inclined surface; a first spring for resetting is arranged between the first switching frame and the frame; a second inclined surface is arranged at an inclined distribution on the lower end of the synchronous frame; a second switching frame is slidably connected in the frame and drives the switching wheel to slide axially; the second switching frame abuts against the second inclined surface; a second spring for resetting is arranged between the second switching frame and the frame.

[0015] Compared with the prior art, the beneficial effect of the present invention is that: the present invention closes the air outlet of the fan through the rotation of the blades when each blade is in a horizontal position, thereby preventing dust, leaves and other debris from the outside from entering the heat pump unit. At the same time, the dust cover is rotated to generate centrifugal force to throw out the debris on the upper end of the blades, thereby achieving the purpose of cleaning the dust cover.

[0016] This solution can accurately control the direction of the fan exhausting hot air by controlling the rotation angle of the blades and the rotation angle of the dust cover. This direction should follow the wind direction outside to improve the heat dissipation efficiency. If this direction is opposite to the wind direction outside, the wind outside will blow the hot air back into the heat pump unit, and the hot air in the heat pump unit will be difficult to discharge, reducing the heat dissipation efficiency.

[0017] This solution sets a 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 relative to each other, the rotation angle of the blade is controlled, thereby accurately controlling the direction in which the fan discharges hot air.

[0018] This solution uses the cooperation of high-speed motor and sliding plug. When the high-speed motor rotates forward, the sliding plug drives the dust cover to rotate forward quickly. The centrifugal force generated by the dust cover will clean the dust cover. When the high-speed motor rotates reversely, the sliding plug drives the fan blades to rotate in the opposite direction quickly to dissipate heat from the heat exchanger.

[0019] And as the sliding pin moves up and down, when the sliding pin moves upward, the sliding pin is not only used to insert 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. When the dust cover rotates at high speed, the dust cover will also drive the switching wheel to rotate synchronously at high speed, and by separating the motor gear from the switching wheel, the high-speed rotating switching wheel is prevented from affecting the stepper motor.

[0020] When the sliding pin moves downward, the sliding pin 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, thereby changing the state between the fixed ring and the adjusting ring, so that the fixed ring and the adjusting ring can switch between synchronous rotation and relative rotation.

[0021] High-speed motors rotate fast, but cannot precisely control the rotation angle. Stepper motors cannot rotate at high speeds, but can precisely control their own rotation angles. This solution makes full use of the characteristics of high-speed motors and stepper motors, so that the high-speed motor can drive the dust cover to rotate synchronously at high speed when rotating forward, so that the dust cover generates centrifugal force, which is convenient for cleaning debris on the top of the blades. The stepper motor can also drive the dust cover to rotate to a specified angle, precisely controlling the heat dissipation direction of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a cross-sectional structural schematic diagram of the present invention; Figure 3 It is a schematic cross-sectional structural diagram of the fan of the present invention; Figure 4 It is a schematic cross-sectional view of the dust cover of the present invention; Figure 5 It is a schematic diagram of the installation structure of the switching wheel of the present invention; Figure 6 This is a schematic diagram of the structure when the sliding plug post of the present invention is located in the middle position; Figure 7 It is a schematic diagram of the exploded structure of the first switching rack and the second switching rack of the present invention.

[0023] Description of the numbers in the figure: 11. Fan; 12. Heat exchanger; 13. Compressor; 14. Condenser; 21. Rack; 22. High-speed motor; 23. Screw; 231. Switching slot; 24. Blade; 241. Blade slot; 3. Dust cover; 31. Blade; 311. Slide slot; 32. Fixed ring; 321. Fixed gear; 33. Adjusting ring; 331. Adjusting connecting plate; 332. Adjusting slot; 333. Threaded 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 column; 511. Guide wall; 52. Synchronous frame; 521. First inclined plane; 522. Second inclined plane; 53. Positioning spring; 54. First switching frame; 55. Second switching frame. DETAILED DESCRIPTION

[0024] Specific embodiment 1: Please refer to Figure 1-Figure 7 A 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.

[0025] The rotating shaft of the fan blade 24 is arranged longitudinally; the fan 11 is directly opposite to the heat exchanger 12 .

[0026] 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.

[0027] 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.

[0028] 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 .

[0029] 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.

[0030] 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 .

[0031] When the high-speed motor 22 rotates forward, due to the effect of inertia, the sliding pin 51 does not rotate, while the screw 23 rotates, so that the screw 23 drives the sliding pin 51 to move upward to the upper limit position of the switching slot 231, and the sliding pin 51 is inserted into the adjustment slot 332, and then the screw 23 drives the sliding pin 51 to rotate forward synchronously.

[0032] When the high-speed motor 22 reverses, the screw 23 first drives the sliding pin 51 to move downward to the lower end limit position of the switching slot 231, and the sliding pin 51 is inserted into the fan blade slot 241. Then the screw 23 drives the sliding pin 51 and the fan blade 24 to rotate synchronously in the opposite direction.

[0033] The upper and lower ends of the sliding pin 51 are respectively provided with inclined guide walls 511 ; the guide walls 511 facilitate the sliding pin 51 to be inserted into the fan blade slot 241 and the adjustment slot 332 .

[0034] A fixed gear 321 is coaxially arranged on the fixed ring 32; a synchronous gear 334 and an adjusting gear 335 are coaxially arranged on the adjusting 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 adjusting gear 335; when only the second gear 412 is meshing with the synchronous gear 334, the adjusting ring 33 rotates synchronously with the fixed ring 32; when only the differential gear 413 is meshing with the adjusting gear 335, the rotation speeds of the adjusting ring 33 and the fixed ring 32 are different. In the above process, the fixed gear 321 is always meshing with the first gear 411.

[0035] 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. Therefore, 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, so that only when the differential gear 413 is meshed with the adjustment gear 335, the rotation speeds of the adjustment ring 33 and the fixed ring 32 are different, and the adjustment ring 33 and the fixed ring 32 rotate relative to each other.

[0036] A stepper motor 43 is fixedly connected inside the frame 21 ; a motor gear 42 capable of meshing with a differential gear 413 is disposed on the output shaft of the stepper motor 43 .

[0037] A synchronous frame 52 is longitudinally slidably connected inside the frame 21 and moves longitudinally synchronously with the sliding plug 51; when the synchronous frame 52 is located 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 located at the lower limit position, the synchronous frame 52 engages the differential gear 413 with the adjustment gear 335.

[0038] Positioning springs 53 are respectively arranged between the upper and lower ends of the synchronous frame 52 and the frame 21; when the high-speed motor 22 is not working, the positioning springs 53 make the synchronous frame 52 and the sliding pin 51 located in the middle position, and at this time the sliding pin 51 is not in contact with the fan blade slot 241 and the adjustment slot 332.

[0039] The upper end of the synchronous frame 52 is provided with a first inclined surface 521 with an inclined distribution; the frame 21 is slidably connected with a first switching frame 54 that drives the motor gear 42 to slide axially; the first switching frame 54 abuts against the first inclined surface 521; a first spring for resetting is provided between the first switching frame 54 and the frame 21; the lower end of the synchronous frame 52 is provided with a second inclined surface 522 with an inclined distribution; the frame 21 is slidably connected with a second switching frame 55 that drives the switching wheel 41 to slide axially; the second switching frame 55 abuts against the second inclined surface 522; a second spring for resetting is provided between the second switching frame 55 and the frame 21.

[0040] The first switching frame 54 and the motor gear 42 move synchronously in the axial direction and rotate relatively in the circumferential direction; the second switching frame 55 and the switching wheel 41 move synchronously in the axial direction and rotate relatively in the circumferential direction.

[0041] In the initial state, each blade 31 is in a horizontal position, closing the air outlet of the fan 11; the sliding plug 51 is in a middle position. The second gear 412 is meshed with the synchronous gear 334, and the motor gear 42 is meshed with the differential gear 413.

[0042] Before use, the high-speed motor 22 rotates forward, and the screw 23 first drives the sliding plug 51 to move upward, so that the sliding plug 51 is plugged into the adjustment slot 332. At the same time, as the sliding plug 51 moves upward, the synchronous 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 is not engaged with the differential gear 413. Then the high-speed motor 22 continues to rotate forward, and the sliding plug 51 drives the adjustment ring 33 to rotate synchronously, and at this time the second gear 412 is engaged with the synchronous gear 334, and then 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 debris on the blade 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 pin 51 and the synchronous 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 and the differential gear 413 are meshed again.

[0043] The high-speed motor 22 drives the screw rod 23 to rotate in the opposite direction, and the sliding pin 51 moves downward and plugs into the blade slot 241. At the same time, as the sliding pin 51 moves downward, the synchronous frame 52 moves downward together, and 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, so that the second gear 412 is separated from the synchronous gear 334, and the differential gear 413 is meshed with the adjustment gear 335.

[0044] After that, the high-speed motor 22 will drive the blades 24 to rotate continuously. Then the stepper motor 43 starts working, and drives the switching wheel 41 to rotate through the motor gear 42. Since the differential gear 413 is meshed with the adjustment gear 335 at this time, the rotation speeds of the adjustment ring 33 and the fixed ring 32 are different, and relative rotation occurs. 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 then the air outlet of the fan 11 is connected to the outside world. When the blade 31 rotates to the specified angle, the stepper motor 43 stops working.

[0045] If the angle of the dust cover 3 needs to be adjusted at this time, the high-speed motor 22 is controlled to stop working, the sliding plug 51 and the synchronous frame 52 move to the middle position, the second gear 412 is meshed with the synchronous gear 334, and then the stepper motor 43 works, the motor gear 42 drives the switching wheel 41 to rotate, and then the stepper motor 43 drives the dust cover 3 to rotate slowly, so that the dust cover 3 rotates to a specified angle according to the external wind direction. Then the angle adjustment of the dust cover 3 and the blade 31 is completed.

[0046] Then the high-speed motor 22 works in the reverse direction, and the high-speed motor 22 continuously drives the fan blades 24 to rotate, so as to discharge the hot air in the heat pump unit.

[0047] When the work is completed and the blades 31 are needed to close the air outlet of the fan 11 again, the high-speed motor 22 works in the reverse direction, the stepper motor 43 drives the switching wheel 41 to rotate, and the switching wheel 41 drives the fixing ring 32 and the adjusting ring 33 to rotate relative to each other, so that the lifting frame 34 gradually moves downward until each blade 31 closes the air outlet of the fan 11. Then the high-speed motor 22 and the stepper motor 43 stop working.

Claims

1. A precision-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, fan blades rotatably connected to the frame, and a dust cover installed at the upper end of the frame for shielding the air outlet of the frame; the dust cover includes a fixed ring, and a plurality of blades arranged in a horizontal direction and rotatably connected to the fixed ring; the rotating shaft of the blade 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.

2. A precision-controlled high-temperature heat pump unit according to claim 1, characterized in that: The dust cover also includes an adjusting ring that rotates coaxially with the fixing ring and is used to drive each blade to move; when the fixing ring and the adjusting ring rotate relatively, the adjusting ring drives each blade to rotate; when the fixing ring and the adjusting ring rotate synchronously, the dust cover rotates circumferentially.

3. A precision-controlled high-temperature heat pump unit according to claim 2, characterized in that: The dust cover also includes a lifting frame that slides longitudinally on the fixed ring; the blade is provided with radially distributed sliding grooves; the lifting frame is provided with a sliding column that is slidably connected to the sliding groove; the inner wall of the adjustment ring is provided with a threaded groove that is transmission-connected to the lifting frame.

4. A precision-controlled high-temperature heat pump unit according to claim 2, characterized in that: 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 is fixedly connected to the output shaft of the high-speed motor; a switching slot distributed in a spiral shape is provided on the outer wall of the screw; a sliding column transmission-connected to the switching slot is provided on the outer wall of the screw; the cross-section of the sliding 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.

5. A precision-controlled high-temperature heat pump unit according to claim 4, characterized in that: The upper and lower ends of the sliding plug are respectively provided with inclined guide walls.

6. A precision-controlled high-temperature heat pump unit according to claim 4, characterized in that: A fixed gear is coaxially arranged on the fixed ring; a synchronous gear and an adjusting gear are coaxially arranged on the adjusting ring; a switching wheel is rotatably connected in 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 adjusting gear; when only the second gear meshes with the synchronous gear, the adjusting ring rotates synchronously with the fixed ring; when only the differential gear meshes with the adjusting gear, the rotation speeds of the adjusting ring and the fixed ring are different.

7. A precision-controlled high-temperature heat pump unit according to claim 6, characterized in that: A stepper motor is fixedly connected inside the frame; a motor gear capable of meshing with a differential gear is arranged on the output shaft of the stepper motor.

8. The precise control high temperature heat pump unit according to claim 7, characterized in that: A synchronous frame is longitudinally slidably connected in the frame and moves longitudinally synchronously with the sliding plug column; when the synchronous frame is located at the upper limit position, the synchronous frame separates the motor gear from the differential gear; when the synchronous frame is located at the lower limit position, the synchronous frame engages the differential gear with the adjustment gear.

9. A precision-controlled high-temperature heat pump unit according to claim 8, characterized in that: Positioning springs are respectively arranged between the upper and lower ends of the synchronous frame and the frame.

10. The precise control high temperature heat pump unit according to claim 8, characterized in that: The upper end of the synchronous frame is provided with a first inclined surface with an inclined distribution; the frame is slidably connected with a first switching frame for driving the motor gear to slide axially; 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; the lower end of the synchronous frame is provided with a second inclined surface with an inclined distribution; the frame is slidably connected with a second switching frame for driving the switching wheel to slide axially; 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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