Defrosting and anti-icing device for air source heat pump unit

Abstract

The utility model discloses a defrosting anti-icing device for an air source heat pump unit, which comprises the air source heat pump unit, the air source heat pump unit comprises a rack, circulating equipment is assembled in the rack, a heat exchanger is assembled at the top end of the circulating equipment, a fan is assembled at the top of the heat exchanger, and a defrosting mechanism is assembled outside the heat exchanger. According to the utility model, the fixed frame which is driven by a motor and can be synchronously lifted is arranged, and the scraping plate and the brush roller which are assembled outside the fixed frame can remove water vapor condensed on the outer wall of a heat exchanger fin in an external scraping and internal brushing manner, so that the water vapor is prevented from being piled into ice; the air source heat pump unit effectively solves the problems that when an existing air source heat pump unit is used under the low-temperature working condition, or the temperature of a heat exchanger is low, water vapor is condensed on the outer walls of cooling fins of the heat exchanger, and the heat exchanger is frosted or frozen, the heat exchange efficiency is stable, and the energy-saving effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field, in particular to a defrosting and anti-icing device for an air source heat pump unit. Background Art

[0002] When operating in cold climates, air-source heat pump units are prone to frost and even ice forming on the outer surfaces of their fins. This is especially true in low-temperature, high-humidity environments. Frost can significantly reduce the heat exchange efficiency of the heat pump, impacting its normal operation. The accumulation of frost or ice not only increases wind resistance but can also damage the fins and other key components of the heat pump. Therefore, efficient defrosting and anti-icing methods have become a key research area in air-source heat pump technology.

[0003] Most existing air source heat pump units use electric heating or reverse cycle defrosting. Although this solves the frost problem to a certain extent, these methods have the problems of high energy consumption, long defrosting time, and a significant impact on the stability of system operation. In addition, reverse cycle defrosting interrupts the unit's heating function, causing indoor temperature fluctuations and affecting the user experience. Moreover, in the extremely cold regions of the north, traditional defrosting methods are not ideal when dealing with frequent frost and ice formation. The energy-saving effect is poor. In view of the above problems, a defrosting and anti-icing device for air source heat pump units is proposed. Utility Model Content

[0004] The purpose of the present utility model is to provide a defrosting and anti-icing device for an air source heat pump unit, so as to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a defrosting and anti-icing device for an air source heat pump unit, comprising an air source heat pump unit, wherein the air source heat pump unit comprises a frame, a circulation device is mounted inside the frame, a heat exchanger is mounted on the top of the circulation device, a fan is mounted on the top of the heat exchanger, and a defrosting mechanism is mounted on the outside of the heat exchanger;

[0006] The defrost mechanism includes a connecting rod, both ends of the connecting rod are equipped with gearboxes, the center of the gearbox is equipped with a transmission shaft, the outer side of the transmission shaft is engaged with a bevel gear shaft, the top of the bevel gear shaft is rotatably equipped with a slider, the outside of the slider is equipped with a scraper and a brush roller, and the scraper and brush roller can clean the external fin surface of the heat exchanger.

[0007] Preferably, a frame plate is mounted on the outside of the frame, and a circulation hole is opened on the outer wall of the frame plate.

[0008] Preferably, the fan is mounted on the top of the heat exchanger, and the fan can drive the airflow from the outside of the heat exchanger through the outer wall of the heat exchanger to exchange the heat exchange medium inside the heat exchanger.

[0009] Preferably, the circulation device is connected to the heat exchanger via a pipeline, so that the heat exchange medium is circulated between the cooling demand ends to output heat energy.

[0010] Preferably, an outer wall of the bevel gear shaft is provided with an external thread, and the slider is screwed onto the outside of the external thread.

[0011] Preferably, the outer end of the transmission shaft is equipped with a gear plate, and the bottom end of the bevel gear shaft is equipped with a bevel gear, and the bevel gear is meshed with the gear plate.

[0012] Preferably, the outer wall of the sliding block is equipped with a fixing frame, and the scraper is fixed to the outer surface of the fixing frame from the outside.

[0013] Preferably, a brush roller is rotatably mounted on the inner side of the fixing frame.

[0014] Preferably, a gear is provided on the outside of the shaft of the brush roller, and a gear bar is provided at a position parallel to the inner side of the heat exchanger, and the gear and the gear bar are meshed with each other.

[0015] Preferably, the heat exchanger includes a circulation pipe, the outer wall of the circulation pipe is evenly equipped with heat dissipation fins, and the inner side of the heat exchanger is equipped with an inclined guide bar to prevent the accumulation of cleaned debris.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a fixed frame driven by a motor and capable of synchronous lifting and lowering, and the scraper and brush roller assembled on the outside of the fixed frame can remove the water vapor condensed on the outer wall of the heat exchanger fin by scraping outside and brushing inside, thereby preventing the water vapor from accumulating into ice, and effectively solving the problem that the existing air source heat pump unit is used in a low temperature operating condition, or the heat exchanger temperature is low, causing the water vapor to condense on the outer wall of the heat exchanger fin and cause frost or ice on the heat exchanger, including stabilizing the heat exchange efficiency and improving the energy saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the top perspective of the three-dimensional diagram of the present invention.

[0018] Figure 2 This is a schematic diagram of the bottom perspective of the three-dimensional diagram of the present invention.

[0019] Figure 3 This is a schematic diagram of the heat exchanger structure of the present utility model.

[0020] Figure 4 Figure 3 Schematic diagram of the perspective at point A in the middle.

[0021] Figure 5 This is a schematic structural diagram of the heat exchanger of the present invention from a top perspective.

[0022] Figure 6 This is a schematic diagram of the assembly of the heat exchanger of the present invention from a top perspective.

[0023] Figure 7 This is a schematic diagram of the heat exchanger assembly of the present invention.

[0024] In the figure: 1. Air source heat pump unit, 11. Frame, 12. Circulation equipment, 13. Fan, 14. Heat exchanger, 15. Guide bar, 16. Heat dissipation fin, 2. Defrost mechanism, 21. Connecting rod, 22. Gearbox, 23. Drive shaft, 24. Gear plate, 25. Bevel gear shaft, 26. Slider, 27. Fixed frame, 28. Scraper, 29. Brush roller. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1-7 The utility model provides a technical solution: a defrosting and anti-icing device for an air source heat pump unit, comprising an air source heat pump unit 1, the air source heat pump unit 1 comprising a frame 11, a circulation device 12 being assembled inside the frame 11, a heat exchanger 14 being assembled on the top of the circulation device 12, a fan 13 being assembled on the top of the heat exchanger 14, and a defrosting mechanism 2 being assembled outside the heat exchanger 14;

[0027] The defrost mechanism 2 includes a connecting rod 21, both ends of the connecting rod 21 are equipped with a gearbox 22, the center of the gearbox 22 is equipped with a transmission shaft 23, the outer side of the transmission shaft 23 is engaged with a bevel gear shaft 25, the top of the bevel gear shaft 25 is rotatably equipped with a slider 26, the outside of the slider 26 is equipped with a scraper 28 and a brush roller 29, the scraper 28 and the brush roller 29 can clean the external fin surface of the heat exchanger 14.

[0028] The utility model provides a fixing frame 27 which is driven by a motor and can be raised and lowered synchronously. The scraper 28 and the brush roller 29 assembled on the outside of the fixing frame 27 can remove the water vapor condensed on the outer wall of the heat exchanger fin by scraping outside and brushing inside, so as to prevent the water vapor from accumulating into ice. This effectively solves the problem that the existing air source heat pump unit is used in a low temperature operating condition, or the heat exchanger temperature is low, which causes the water vapor to condense on the outer wall of the heat exchanger fin and cause frost or ice on the heat exchanger, including stabilizing the heat exchange efficiency and improving the energy saving effect.

[0029] To address this technical challenge, a synchronously driven scraper attached to the outer surface of the fins physically scrapes away frost and ice, effectively improving defrosting efficiency and reducing energy consumption. This defrosting and anti-icing solution mechanically removes frost and ice from the fins, avoiding issues such as excessive electric heating energy consumption and reverse heating cycles that affect heating. It also ensures long-term stable operation of the air source heat pump in low-temperature environments.

[0030] Especially in the external application of V-shaped air source heat pump units, the V-shaped structure makes the air flow more concentrated and uniform, which can further optimize the heat exchange effect and air circulation efficiency. Compared with the traditional flat design, the V-shaped design can also enhance the frost resistance of the heat pump in cold environments, but frost and ice are still inevitable. Therefore, combining the synchronous drive scraper device with the V-shaped structure can not only efficiently scrape off the frost on the fin surface, but also use the V-shaped external structure to better drain water and reduce the risk of frost accumulation again. This integrated solution has significant advantages in dealing with the anti-icing problem of air source heat pump units under extreme climatic conditions, and provides reliable protection for the stable operation of air source heat pumps.

[0031] Specifically, a rack plate is assembled on the outside of the rack 11, and a circulation hole is opened on the outer wall of the rack plate. The rack plate is used to decorate and protect the entire equipment. A shell made of half sheet metal bending is assembled on the outer wall of the rack 11, and circulation holes are evenly opened on the outside of the sheet metal shell for the introduction of external airflow. The plate-shaped shell can also have a certain thermal insulation effect. When the external ambient temperature is low, the temperature of the internal operation of the equipment can be kept warm, slowing down the heat generated by the equipment from being dissipated to the outside, and can be directly utilized by the air source heat pump.

[0032] Specifically, the fan 13 is installed on the top of the heat exchanger. The fan 13 can drive the air flow from the outside of the heat exchanger through the outer wall of the heat exchanger 14 to exchange the heat exchange medium inside the heat exchanger 14. The fan 13 is a commonly used air flow guiding mode for the air source heat pump unit of the V-shaped heat exchange equipment. Its main advantage is that a fan of a single device drives the heat exchange area of the V-shaped supported heat exchanger to increase, the air flow rate is stable, and turbulence inside the wall is avoided, the flow rate is increased, and the heat exchange efficiency can be improved.

[0033] Specifically, the circulation device 12 and the heat exchanger 14 are connected by a pipeline, and the heat exchange medium is circulated and transferred between the cooling demand ends to output heat energy. The circulation device 12 and the heat exchanger 14 use equipment to circulate the heat exchange medium between the pipeline and the expansion valve and the compression tank, so as to release and utilize the required temperature difference potential energy and obtain heat energy in the air to heat or cool the water or other media required.

[0034] Specifically, the outer wall of the bevel gear shaft 25 is provided with an external thread, and the slider 26 is screwed onto the outside of the external thread. A guide rail-shaped shell is provided on the outside of the gear shaft 25, and the two ends of the gear shaft 25 are rotatably assembled on the ends of the guide rail shell. When the gear plate 24 rotates, the gear plate 24 drives the bevel gear shaft 25 to rotate, thereby driving the gear shaft 25 to rotate inside the shell, so that the slider 26 engages with the external thread to slide inside the groove of the guide rail shell, thereby driving the slider 26, the fixing bracket 27 and the equipment installed outside the fixing bracket 27 to translate outside the heat exchanger 14, thereby achieving the purpose of defrosting, and during normal use, the final stop position of the slider 26 should be at the top of the equipment.

[0035] It should be noted that the gearbox 22 is a worm gear reducer with a worm as the input end and a turbine axis as the output end, driving the transmission shaft 23 to rotate, and then continuing to drive the bevel gear shaft 25 to rotate through the gear plate 25 to realize the lifting and lowering of the slider 26. When in use, since the motor is coaxially driven, at least three gears should be used in the gear drive mode to ensure that the rotation direction of the connecting rod 21 is the same as the rotation direction of the motor, and the rotation direction of the motor is preferably clockwise.

[0036] by Figure 2 For example, in the figure, the axis of the connecting rod 21 is the front-back direction, the axis of the transmission shaft 23 is the left-right direction, and the column of the frame 11 is the up-down direction, forming a virtual three-dimensional tri-axis.

[0037] When in use, the external motor can use gears to indirectly drive the connecting rod 21 to rotate, or use the motor shaft of the through-axis motor directly as the connecting rod 21 to drive the worm gear structure inside the gearbox 22 to rotate. The clockwise transmission connecting rod 21 of the motor rotates clockwise, and then the transmission shaft 23 rotates clockwise when viewed from the right, thereby synchronously transmitting the bevel gear shaft 25 to rotate clockwise from a nearly top-down perspective, thereby driving the slider 26 to rise and fall.

[0038] The initial positions of the slider 26 and the fixing bracket 27 are at the top. During operation, the fixing bracket 27 will first be driven to move downward for cleaning. After cleaning, the motor rotates in the opposite direction until it is reset. Sensors or switches for travel limits are provided at the top and bottom ends of the guide rail housing outside the slider to limit the position of the slider 26 to avoid overload damage.

[0039] Specifically, the outer end of the transmission shaft 23 is equipped with a gear plate 24, and the bottom end of the bevel gear shaft 25 is equipped with a bevel gear. The bevel gear is engaged with the gear plate 24. A single gear plate 24 is engaged with the bevel gear structure at the bottom end of the two bevel gear shafts 25, which can achieve unidirectional transmission. The gear plate 24 is also a disc-shaped structure with bevel gear teeth. When set, the intersection of the extension line of the bevel gear shaft 25 coincides with the axial center line of the gear plate 24 and is perpendicular.

[0040] Specifically, the outer wall of the slider 26 is equipped with a fixing frame 27, and the scraper 28 is fixed to the outer surface of the fixing frame 27 from the outside. The scraper 28 is a scraper-shaped structure that fits the outer surface of the heat sink fin 16. During the displacement process, it can scrape down the frost, ice or small water droplets condensed on the outer surface of the heat sink fin 16.

[0041] Specifically, a brush roller 29 is rotatably mounted inside the fixing frame 27 .

[0042] Specifically, a gear is provided on the outside of the shaft of the brush roller, and a gear bar is provided in a position parallel to the inner side of the heat exchanger 14. The gear and the gear bar are meshed with each other. When in use, the displacement of the fixing frame 27 will drive the axis of the gear to displace in a direction parallel to the gear bar. Therefore, during the displacement process, the fixed gear bar will drive the displaced gear to passively rotate, thereby achieving the purpose of rotating the brush roller 29 during the follow-up lifting process, and removing dust or condensed water droplets on the inside of the heat dissipating fins 16 during the rotation.

[0043] Since the external air enters the inner wall of the heat dissipation fin 16 from the bottom to the top, the water vapor will condense on the outside first. Therefore, the scraper structure is set on the outside to effectively scrape off the excess water vapor on the outside. When necessary, the internal brush roller 29 can also be replaced with a scraper structure of the scraper 28.

[0044] Specifically, the heat exchanger 14 includes a circulation pipe, the outer wall of which is evenly equipped with heat dissipation fins 16. The inner side of the heat exchanger 14 is equipped with an inclined guide bar 15 to prevent the accumulation of cleaned debris. The guide bar 15 is used to guide the debris and water droplets cleaned from the inside to the outside, ensuring that the inside will not be filled with cleaned debris.

[0045] The scraper 28 can be designed with a streamlined curved edge and a wedge-shaped cross section to ensure efficient scraping of frost, ice, or other deposits with minimal resistance when contacting the fin surface. The front end of the scraper 28 can be designed with a slight arc to minimize damage to the fins while removing foreign matter.

[0046] The overall shape of the scraper 28 is similar to a sickle or crescent, and it has a certain degree of flexibility, ensuring that the scraper 28 can conform to the uneven structure of the fin surface during the scraping process. The length and width of the scraper 28 should match the spacing and structure of the fins. The scraper 28 is equipped with multiple fine serrations on its edge to enhance the scraping effect on stubborn foreign matter. In addition, the scraper 28 should be made of a wear-resistant and corrosion-resistant metal or composite material to ensure its service life in harsh environments.

[0047] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0048] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A defrosting and anti-icing device for an air source heat pump unit, comprising an air source heat pump unit (1), characterized in that: The air source heat pump unit (1) comprises a frame (11), a circulation device (12) is installed inside the frame (11), a heat exchanger (14) is installed on the top of the circulation device (12), a fan (13) is installed on the top of the heat exchanger (14), and a defrosting mechanism (2) is installed outside the heat exchanger (14); The defrosting mechanism (2) includes a connecting rod (21), both ends of the connecting rod (21) are equipped with a gearbox (22), the center of the gearbox (22) is equipped with a transmission shaft (23), the outer side of the transmission shaft (23) is meshed with a bevel gear shaft (25), the top of the bevel gear shaft (25) is rotatably equipped with a slider (26), the outside of the slider (26) is equipped with a scraper (28) and a brush roller (29), and the scraper (28) and the brush roller (29) can clean the external fin surface of the heat exchanger (14).

2. The defrosting and anti-icing device for an air source heat pump unit according to claim 1, characterized in that: The outside of the frame (11) is equipped with a frame plate, and the outer wall of the frame plate is provided with a circulation hole.

3. The defrosting and anti-icing device for an air source heat pump unit according to claim 2, characterized in that: The fan (13) is mounted on the top of the heat exchanger, and the fan (13) is capable of driving airflow from the outside of the heat exchanger through the outer wall of the heat exchanger (14) to exchange heat exchange medium inside the heat exchanger (14).

4. The defrosting and anti-icing device for an air source heat pump unit according to claim 1, characterized in that: The circulation device (12) and the heat exchanger (14) are connected via a pipeline, so that the heat exchange medium is circulated and transferred between the cooling demand ends to output heat energy.

5. The defrosting and anti-icing device for an air source heat pump unit according to claim 1, characterized in that: An outer wall of the bevel gear shaft (25) is provided with an external thread, and the slider (26) is screwed onto the outside of the external thread.

6. The defrosting and anti-icing device for an air source heat pump unit according to claim 5, characterized in that: The outer end of the transmission shaft (23) is equipped with a gear plate (24), and the bottom end of the bevel gear shaft (25) is equipped with a bevel gear, and the bevel gear is meshed with the gear plate (24).

7. The defrosting and anti-icing device for an air source heat pump unit according to claim 1, characterized in that: The outer wall of the slider (26) is equipped with a fixing frame (27), and the scraper (28) is fixed to the outer surface of the fixing frame (27) from the outside.

8. The defrosting and anti-icing device for an air source heat pump unit according to claim 7, characterized in that: A brush roller (29) is rotatably mounted on the inner side of the fixed frame (27).

9. The defrosting and anti-icing device for an air source heat pump unit according to claim 1, characterized in that: A gear is provided on the outside of the shaft of the brush roller, and a gear bar is provided at a position parallel to the inside of the heat exchanger (14), and the gear and the gear bar are meshed with each other.

10. The defrosting and anti-icing device for an air source heat pump unit according to claim 1, characterized in that: The heat exchanger (14) includes a circulation pipe, the outer wall of which is evenly equipped with heat dissipation fins (16), and the inner side of the heat exchanger (14) is equipped with an inclined guide bar (15) for preventing the accumulation of cleaned debris.

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