Air source heat pump unit with intelligent defrosting function

Abstract

The invention provides an air source heat pump unit with an intelligent defrosting function, and belongs to the technical field of heat pump units. Comprising a unit box, the two ends of the inner side of the unit box are fixedly connected with fixing plates, the tops of the two fixing plates are fixedly connected with the same evaporator, the bottom of the evaporator fixedly communicates with a discharge pipe, and the bottoms of the two fixing plates are fixedly connected with the same fixing seat. By arranging the temperature sensor, the flow dividing valve, the air pipe, the defrosting spray head and the flow blocking cover, when the temperature sensor detects that the temperature of the outer side of the evaporator is lower than a certain degree, part of hot steam output downwards from the interior of the connecting pipe is divided through the flow dividing valve, and then the hot steam is sprayed out of the evaporator through the air pipe and the defrosting spray head; and hot steam is guided through the flow blocking cover to flow on the outer side of the evaporator, a frost layer condensed on the outer side of the evaporator is automatically eliminated, the intelligent defrosting effect of the device is achieved, and the practicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat pump units, and in particular to an air source heat pump unit with an intelligent frost function. Background Art

[0002] The working principle of the air source heat pump unit is based on the reverse Carnot cycle principle. The liquid working medium first absorbs heat from the air in the evaporator and evaporates to form steam. It is then compressed into high-temperature and high-pressure gas by the compressor and condensed into liquid in the condenser. The absorbed heat is transferred to the water that needs to be heated. The liquid working medium then returns to the evaporator, absorbs heat and evaporates to complete a cycle. This cycle repeats, continuously absorbing heat from the low-temperature source and outputting it to the heated water, directly reaching the predetermined temperature.

[0003] When the existing air source heat pump unit is in use, the fin heat exchanger will absorb heat from the air. When the ambient temperature is below zero degrees, the water vapor in the air will come into contact with the fins and frost will form when it is cooled. The frost layer not only increases the thermal resistance, but also blocks the fin channel, causing the heat pump performance to deteriorate.

[0004] Therefore, the present invention provides an air source heat pump unit with intelligent frost function to meet the needs. Summary of the Invention

[0005] The object of the present invention is to provide an air source heat pump unit with an intelligent frost function to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an air source heat pump unit with an intelligent frost function, comprising a unit box, both ends of the inner side of the unit box are fixedly connected to fixed plates, the tops of the two fixed plates are fixedly connected to the same evaporator, the bottom of the evaporator is fixedly connected to an exhaust pipe, the bottoms of the two fixed plates are fixedly connected to the same fixing seat, the inner side of the fixing seat is fixedly connected to a compressor, the bottom end of the exhaust pipe is fixedly connected to the compressor, the bottom of the compressor is fixedly connected to a connecting pipe, and the outer side of the connecting pipe is fixedly connected to A diverter valve, both sides of the diverter valve are fixedly connected with an air pipe, the other end of the air pipe is fixedly connected with a defrost nozzle, both ends of the outer side of the fixed plate are fixedly connected with support rods, the tops of the two support rods are fixedly connected with the same baffle cover, both sides of the evaporator are fixedly connected with V-shaped fins, the outer side of the evaporator is fixedly connected to a number of inclined fins on both sides of the V-shaped fins, the outer side of the evaporator is fixedly connected to barrier fins on both sides of the inclined fins, the bottom end of the outer side of the evaporator is fixedly connected to a temperature sensor, and the bottom of the unit box is fixedly connected to a condenser.

[0007] As a preferred embodiment, air columns are fixedly connected to both ends of the top of the evaporator, extending to and penetrating above the unit box, and protective nets are fixedly connected around the top of the unit box.

[0008] As a preferred embodiment, the inclined fin is inclined upward at one end away from the V-shaped fin, the two sides of the top of the V-shaped fin are respectively connected to the two inclined fins located at the top, and the upward inclined end of the inclined fin is connected to the corresponding barrier fin.

[0009] As a preferred embodiment, the bottom of the defrost nozzle is fixedly connected to the top of the corresponding fixed plate, the defrost nozzle is located directly below the V-shaped fin, and the baffle is located above the defrost nozzle at one end away from the evaporator.

[0010] As a preferred embodiment, a heating tube is fixedly connected to the inner side of the condenser, and a drain pipe and a water inlet pipe are fixedly connected to both ends of the heating tube, and the other ends of the drain pipe and the water inlet pipe respectively pass through the outside of the two ends of the unit box.

[0011] As a preferred embodiment, the bottom end of the connecting pipe is fixedly connected to the condenser, and the outer side of the condenser is fixedly connected to a reflux pipe.

[0012] As a preferred embodiment, the other end of the reflux pipe is fixedly connected to the top of the evaporator, and a reflux pump is fixedly connected to the bottom of the inner cavity of the unit box, which is fixedly connected to the reflux pipe.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention, by setting a temperature sensor, a diverter valve, an air pipe, a defrost nozzle and a baffle, makes it possible for the temperature sensor to separate part of the hot steam output downward in the connecting pipe through the diverter valve when detecting that the temperature outside the evaporator is lower than a certain level, and then spray it to the outside of the evaporator through the air pipe and the defrost nozzle, and guide the hot steam through the baffle to make it flow outside the evaporator, automatically eliminating the frost layer condensed on the outside of the evaporator, so that the device has the effect of intelligent defrosting, and improves the practicality of the device.

[0014] This invention, by arranging V-shaped fins, inclined fins and barrier fins, not only serves the heat exchange function for the evaporator, but also when the defrost nozzle sprays hot steam upward, it will be separated to both sides by the V-shaped fins. Due to the upward flow characteristic of hot steam, it will flow upward along the V-shaped fins and flow into the gap between each inclined fin until it reaches the top, so that the hot steam will enter each gap of the fins, making the defrosting area more uniform, thereby improving the defrosting effect of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1This is a schematic diagram of the three-dimensional structure of an air source heat pump unit with intelligent frost function; Figure 2 It is a schematic diagram of the cutaway three-dimensional structure of the unit box; Figure 3 for Figure 2 A magnified schematic diagram of point A; Figure 4 for Figure 2 Enlarged schematic diagram of point B.

[0016] In the figure: 1. Unit box; 2. Fixing plate; 3. Evaporator; 4. Discharge pipe; 5. Fixing seat; 6. Compressor; 7. Connecting pipe; 8. Diverter valve; 9. Air pipe; 10. Defrost nozzle; 11. Support rod; 12. Baffle cover; 13. V-shaped fin; 14. Inclined fin; 15. Barrier fin; 16. Air column; 17. Protective net; 18. Condenser; 19. Heating tube; 20. Drain pipe; 21. Water inlet pipe; 22. Temperature sensor. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to the embodiments.

[0018] The following examples are intended to illustrate the present invention but are not intended to limit the scope of protection of the present invention. The conditions in the examples may be further adjusted according to specific conditions. Simple improvements to the method of the present invention within the scope of the present invention are also within the scope of protection claimed in the present invention.

[0019] See also Figures 1-4 The present invention provides an air source heat pump unit with an intelligent frost function, comprising a unit box 1, both ends of the inner side of the unit box 1 are fixedly connected to a fixing plate 2, the tops of the two fixing plates 2 are fixedly connected to the same evaporator 3, the bottom of the evaporator 3 is fixedly connected to a discharge pipe 4, the bottoms of the two fixing plates 2 are fixedly connected to the same fixing seat 5, the inner side of the fixing seat 5 is fixedly connected to a compressor 6, the bottom end of the discharge pipe 4 is fixedly connected to the compressor 6, the bottom of the compressor 6 is fixedly connected to a connecting pipe 7, the bottom of the unit box 1 is fixedly connected to a condenser 18, and the two ends of the top of the evaporator 3 are fixedly connected to air The column 16 extends and passes through the top of the unit box 1. The top of the unit box 1 is fixedly connected with a protective net 17 on all sides. The inner side of the condenser 18 is fixedly connected with a heating tube 19. The two ends of the heating tube 19 are fixedly connected with a drain pipe 20 and a water inlet pipe 21. The other ends of the drain pipe 20 and the water inlet pipe 21 pass through the outside of the two ends of the unit box 1 respectively. The bottom end of the connecting pipe 7 is fixedly connected with the condenser 18. The outside of the condenser 18 is fixedly connected with a return pipe. The other end of the return pipe is fixedly connected with the top of the evaporator 3. The bottom of the inner cavity of the unit box 1 is fixedly connected with a reflux pump, which is fixedly connected to the reflux pipe.

[0020] Air enters the evaporator 3 through the air column 16 and exchanges heat with the refrigerant inside the evaporator 3, so that the heat in the air is absorbed, the air is cooled, and the refrigerant evaporates at the same time. The evaporated refrigerant enters the compressor 6 through the discharge pipe 4. The compressor 6 compresses the refrigerant to increase its temperature and pressure, and then enters the condenser 18 through the connecting pipe 7. Cold water is added to the heating tube 19 from the water inlet pipe 21. In the condenser 18, the refrigerant gas exchanges heat with the water in the heating tube 19, releasing heat and condensing into liquid. After the cold water is heated, it is discharged through the drain pipe 20. The condensed refrigerant flows back to the evaporator 3 through the return pipe and the reflux pump, and the cycle works.

[0021] See also Figures 1-4 , the outside of the connecting pipe 7 is fixedly connected to a diverter valve 8, both sides of the diverter valve 8 are fixedly connected to an air pipe 9, the other end of the air pipe 9 is fixedly connected to a defrost nozzle 10, both ends of the outside of the fixed plate 2 are fixedly connected to a support rod 11, the top of the two support rods 11 is fixedly connected to the same baffle 12, both sides of the evaporator 3 are fixedly connected to V-shaped fins 13, the outside of the evaporator 3 is located on both sides of the V-shaped fin 13 fixedly connected to a number of inclined fins 14, the outside of the evaporator 3 is located on both sides of the inclined fin 14 fixedly connected to a baffle The partition fin 15 and the bottom end of the outer side of the evaporator 3 are fixedly connected with a temperature sensor 22, the inclined fin 14 is inclined upward at one end away from the V-shaped fin 13, and the two sides of the top of the V-shaped fin 13 are respectively connected to the two inclined fins 14 located at the top, and the upward inclined end of the inclined fin 14 is connected to the corresponding barrier fin 15. The bottom of the defrost nozzle 10 is fixedly connected to the top of the corresponding fixed plate 2, and the defrost nozzle 10 is located directly below the V-shaped fin 13, and the baffle 12 is located above the defrost nozzle 10 at one end away from the evaporator 3.

[0022] When the temperature sensor 22 detects that the temperature outside the evaporator 3 is lower than a certain threshold, the diverter valve 8 is controlled to open, which diverts the refrigerant vapor to the two air pipes 9 and sprays it out through the defrost nozzle 10. The hot steam is diverted through the V-shaped fins 13 and guides it into the gaps between the inclined fins 14 to clean the frost layer in the fins.

[0023] The hot steam diverted by the diverter valve 8 is sprayed to the outside of the evaporator 3 through the defrost nozzle 10 under the guidance of the air pipe 9. At this time, the baffle 12 guides the hot steam to form a flowing hot air curtain on the outside of the evaporator 3, ensuring that the hot steam can fully cover and melt the frost condensed on the outside of the evaporator 3. This process not only realizes automation, but also greatly improves the defrosting efficiency, so that the unit can still maintain efficient and stable operation in extremely low temperature environments. It also significantly extends the service life of the unit, reduces the downtime and maintenance time caused by frost, and further improves the practicality and economy of the device.

[0024] When the defrost nozzle 10 sprays out high-temperature hot steam, it will encounter the guidance of the V-shaped fins 13, which will divert it to both sides, ensuring that the hot steam can evenly cover the entire outer surface of the evaporator 3. As the hot steam rises, it is guided into the gaps between the inclined fins 14. The design of the inclined fins 14 not only increases the heat exchange area, but also utilizes the natural upward trend of steam, allowing the steam to flow smoothly upward along the fin gaps. In this process, the heat of the hot steam is effectively transferred to the evaporator 3 and the frost layer on its outside, ensuring that the steam can penetrate into every tiny gap in the fins, which not only improves the uniformity and efficiency of defrosting, but also significantly reduces the time and energy consumption required during the defrosting process.

[0025] The working principle and usage process of the present invention are as follows: air enters the evaporator 3 through the air column 16 and exchanges heat with the refrigerant inside the evaporator 3, so that the heat in the air is absorbed, the air is cooled, and the refrigerant evaporates at the same time. The evaporated refrigerant enters the compressor 6 through the discharge pipe 4. The compressor 6 compresses the refrigerant to increase its temperature and pressure, and then enters the condenser 18 through the connecting pipe 7. Cold water is added to the heating cylinder 19 from the water inlet pipe 21. In the condenser 18, the refrigerant gas exchanges heat with the water in the heating cylinder 19, releasing heat and condensing into liquid. After the cold water is heated, it is discharged through the drain pipe 20. The condensed refrigerant passes through the return pipe and the reflux pump and flows back to the evaporator 3, and the cycle works. When the temperature sensor 22 detects that the temperature outside the evaporator 3 is lower than a certain threshold, it controls the opening of the diverter valve 8, which diverts the refrigerant vapor to two air pipes 9 and sprays it out through the defrost nozzle 10. The hot steam is diverted and guided into the gaps between each inclined fin 14 through the V-shaped fin 13 to clean the frost layer in the fin.

[0026] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and alterations may be made to these embodiments without departing from the principles of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An air source heat pump unit with intelligent frost function, comprising a unit box (1), characterized in that: Both ends of the inner side of the unit box (1) are fixedly connected to fixed plates (2), the tops of the two fixed plates (2) are fixedly connected to the same evaporator (3), the bottom of the evaporator (3) is fixedly connected to a discharge pipe (4), the bottoms of the two fixed plates (2) are fixedly connected to the same fixed seat (5), the inner side of the fixed seat (5) is fixedly connected to a compressor (6), the bottom end of the discharge pipe (4) is fixedly connected to the compressor (6), the bottom of the compressor (6) is fixedly connected to a connecting pipe (7), the outer side of the connecting pipe (7) is fixedly connected to a diverter valve (8), both sides of the diverter valve (8) are fixedly connected to an air pipe (9), and the air pipe (9) The other end is fixedly connected to a defrost nozzle (10), both ends of the outer side of the fixed plate (2) are fixedly connected to support rods (11), the tops of the two support rods (11) are fixedly connected to the same baffle (12), both sides of the evaporator (3) are fixedly connected to V-shaped fins (13), the outer side of the evaporator (3) is fixedly connected to a plurality of inclined fins (14) on both sides of the V-shaped fins (13), the outer side of the evaporator (3) is fixedly connected to barrier fins (15) on both sides of the inclined fins (14), the bottom end of the outer side of the evaporator (3) is fixedly connected to a temperature sensor (22), and the bottom of the unit box (1) is fixedly connected to a condenser (18).

2. The air source heat pump unit with intelligent frost function according to claim 1, characterized in that: Air columns (16) are fixedly connected to both ends of the top of the evaporator (3), extending to and penetrating the top of the unit box (1). Protective nets (17) are fixedly connected to all four sides of the top of the unit box (1).

3. The air source heat pump unit with intelligent frost function according to claim 1, characterized in that: One end of the inclined fin (14) away from the V-shaped fin (13) is inclined upward, and both sides of the top of the V-shaped fin (13) are respectively connected to the two inclined fins (14) located at the top, and the upwardly inclined end of the inclined fin (14) is connected to the corresponding barrier fin (15).

4. The air source heat pump unit with intelligent frost function according to claim 1, characterized in that: The bottom of the defrost nozzle (10) is fixedly connected to the top of the corresponding fixed plate (2), the defrost nozzle (10) is located directly below the V-shaped fin (13), and the baffle (12) is located above the defrost nozzle (10) at one end away from the evaporator (3).

5. The air source heat pump unit with intelligent frost function according to claim 1, characterized in that: A heating tube (19) is fixedly connected to the inner side of the condenser (18), and a drainage pipe (20) and a water inlet pipe (21) are fixedly connected to the two ends of the heating tube (19), respectively. The other ends of the drainage pipe (20) and the water inlet pipe (21) respectively pass through the outside of the two ends of the unit box (1).

6. The air source heat pump unit with intelligent frost function according to claim 1, characterized in that: The bottom end of the connecting pipe (7) is fixedly connected to the condenser (18), and the outside of the condenser (18) is fixedly connected to a reflux pipe.

7. The air source heat pump unit with intelligent frost function according to claim 6, characterized in that: The other end of the reflux pipe is fixedly connected to the top of the evaporator (3), and a reflux pump is fixedly connected to the bottom of the inner cavity of the unit box (1), which is fixedly connected to the reflux pipe.

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