An automatic defrosting device for gas-fired heat pumps in low-temperature environments

Abstract

This invention discloses an automatic defrosting device for gas-fired heat pumps in low-temperature environments, relating to the field of heat pump technology. The device includes a main body with a control panel fixedly installed on one side. The main body contains several fins, a low-temperature flue gas duct, a flue gas conveying duct, and a combustion chamber. A multi-stage defrosting mechanism is fixedly connected to one end of each fin. The main body contains a separation mechanism, and the multi-stage defrosting mechanism includes a vibration mechanism. The multi-stage defrosting mechanism includes two symmetrically distributed electric telescopic rods. By setting up a multi-stage defrosting mechanism, this invention can transfer the temperature generated in the combustion chamber. Furthermore, the different heat transfer methods of the primary and secondary storage chambers can melt the frost on the fins in multiple stages, reducing the temperature difference on the fin surface and preventing fin fatigue due to excessive temperature differences, thereby achieving a long fin lifespan.

Description

Technical Field

[0001] This invention relates to the field of heat pump technology, and in particular to an automatic defrosting device for gas-fired heat pumps based on low-temperature environments. Background Technology

[0002] The gas heat pump automatic defrosting device is a device that uses the waste heat of a gas engine and the circulation of heat medium (antifreeze, hot water) as the core to achieve defrosting of the fins.

[0003] Existing gas-fired heat pump defrosting devices mostly use the method of directly introducing the waste heat generated by the equipment for defrosting.

[0004] However, this method introduces a high-temperature coolant of 80-90°C into the fins, which are in a sub-zero temperature environment. The low-temperature fins and the low-temperature copper tubes are subjected to a temperature difference of nearly 100°C. Since there is a significant difference in the thermal expansion coefficients between the copper tubes and the aluminum fins, the repeated and intense temperature changes accelerate the aging and peeling of the hydrophilic coating on the fin surface. The exposed metal is accelerated to corrode under the action of condensate and heat, which leads to the fins gradually becoming brittle, and eventually causing the fins to fatigue and break.

[0005] Therefore, we provide an automatic defrosting device for gas-fired heat pumps based on low-temperature environments. Summary of the Invention

[0006] The purpose of this invention is to address the aforementioned technical problems by providing an automatic defrosting device for gas-fired heat pumps in low-temperature environments, thereby achieving a long service life for the fins.

[0007] In view of this, the present invention provides an automatic defrosting device for a gas heat pump based on a low-temperature environment, comprising a main body of the device, a control panel fixedly installed on one side of the main body of the device, a plurality of fins inside the main body of the device, a low-temperature flue gas duct, a flue gas conveying duct, and a combustion chamber inside the main body of the device, a multi-stage defrosting mechanism fixedly connected to one end of each fin, a separation mechanism inside the main body of the device, and a vibration mechanism inside the multi-stage defrosting mechanism. The multi-stage defrosting mechanism includes two symmetrically distributed electric telescopic rods. Each of the two electric telescopic rods has a primary storage compartment and a secondary storage compartment at one end. Two sets of connecting short channels are fixedly installed on the side of each primary and secondary storage compartment near the electric telescopic rod. A sealing compartment is located at one end of each connecting short channel, extending into the interior of the sealing compartment. A bifurcated return channel is fixedly installed on the side of the sealing compartment away from the connecting short channel, with both ends extending into the interior of the sealing compartment. A fixed triangular body is fixedly installed on the inner wall of the bifurcated return channel, and a cone is fixedly installed on one side of the fixed triangular body. The cone is inserted into the connecting short channel. The separation mechanism includes a telescopic rod, a sliding body is fixedly installed at the lower end of the telescopic rod, a short flue is fixedly installed on one side of the sliding body, and a long rectangular body is fixedly connected to the end of the short flue away from the sliding body.

[0008] Preferably, each group of connecting short channels consists of two channels, which are symmetrically distributed. The other two sealed compartments are connected to a branch channel on one side. The primary storage compartment and the secondary storage compartment are each fixedly installed with a fixing block on the surface near the sealed compartment. The side of the fixing block away from the primary storage compartment and the secondary storage compartment is fixedly connected to one end of the electric telescopic rod. The end of the electric telescopic rod away from the fixing block is fixedly connected to the inner wall of the main body of the equipment.

[0009] Preferably, a return channel is fixedly installed on the outer side of the bifurcation return channel, a central channel is fixedly installed on the outer side of the bifurcation channel, a delivery pump is fixedly connected to the end of the central channel away from the bifurcation channel, a connecting channel is fixedly installed at the output end of the delivery pump, one end of the connecting channel is fixedly connected to one side surface of the vibration mechanism, a liquid delivery channel is fixedly connected to the side of the vibration mechanism away from the connecting channel, a defrost liquid channel is fixedly connected to the end of the liquid delivery channel away from the vibration mechanism, the defrost liquid channel is inserted into the fin, and one end of the defrost liquid channel extends to one side of the fin, and the end of the return channel away from the bifurcation return channel is fixedly connected to one end of the defrost liquid channel.

[0010] Preferably, the vibration mechanism includes a fixed running chamber, which has a force-receiving chamber and a compression chamber inside. The force-receiving chamber is located above the compression chamber. A partition is fixedly installed inside the fixed running chamber, and a sliding groove is formed through the partition. A force-receiving baffle is slidably installed on the inner wall of the force-receiving chamber, and a force-receiving block is slidably installed on the inner wall of the compression chamber.

[0011] Preferably, a connecting short block is fixedly installed on the upper side of the force-bearing block, and the end of the connecting short block away from the force-bearing block is fixedly connected to the lower surface of the force-bearing baffle. A reciprocating telescopic rod and a reciprocating spring are fixedly installed on one side of the force-bearing block. The ends of the reciprocating telescopic rod and the reciprocating spring away from the force-bearing block are fixedly connected to the inner wall of the compression chamber, and the reciprocating spring is sleeved on the outside of the reciprocating telescopic rod.

[0012] Preferably, one end of the liquid delivery channel and the return channel is fixedly connected to a fixed frame, and the liquid delivery channel and the return channel extend into the fixed frame, and the defrost liquid channel is located inside the fixed frame.

[0013] Preferably, two fixed square frames are fixedly mounted on opposite sides of their respective surfaces with fixed square plates. The fins are fixedly mounted on one side of the fixed square plates. A slot is provided on one side of the fixed square plates. Several long slots are provided on opposite sides of the slots. The sliding bodies are provided with grooves at opposite ends. The inner walls of the grooves are slidably connected to the outer sides of the slots.

[0014] Preferably, a connecting flue is fixedly installed on the side of the sliding body away from the short flue, a deceleration groove is provided on the inner wall of each groove, a deceleration spring is fixedly installed on the inner wall of the deceleration groove, and a snap-fit ​​block is fixedly installed on the end of the deceleration spring away from the deceleration groove.

[0015] Preferably, a fixing block is fixedly installed at the upper end of the telescopic rod, and the side of the fixing block away from the telescopic rod is fixedly connected to the side of the slot. A spring is fixedly installed on the inner wall of the telescopic rod, and a connecting hole is opened inside the telescopic rod. The inside of the telescopic rod is connected to the connecting flue and the inside of the short flue through the connecting hole.

[0016] Preferably, a nozzle is fixedly installed on the side of the long rectangular body away from the short flue. The nozzle is in communication with the interior of the long rectangular body, and the long rectangular body is in communication with the interior of the short flue. A cold shield is provided at one end of the nozzle, and the opposite ends of the cold shield are fixedly connected to the inner wall of the fixed square plate. The cold shield is located between the nozzle and the fin. Protrusions are fixedly installed at both opposite ends of the long rectangular body.

[0017] Compared with the prior art, the present invention provides an automatic defrosting device for gas heat pumps based on low-temperature environments, which has the following beneficial effects: This invention, by setting up a multi-stage defrosting mechanism, can transfer the temperature generated in the combustion chamber. Furthermore, the different heat transfer methods of the primary and secondary storage chambers can melt the frost on the fins in multiple stages, reducing the temperature difference on the fin surface and preventing fin fatigue caused by excessive temperature differences, thereby achieving a long fin service life.

[0018] This invention, by setting up a separation mechanism, can blow off and melt the frost in the interface fusion state using hot air at three levels of temperature, reducing the temperature difference on the fin surface and avoiding fin fatigue caused by excessive temperature difference. At the same time, the direction of blowing away is away from the inside of the device body, thereby preventing melt water from entering the equipment and causing corrosion of internal components, thus achieving the effect of long service life of fins and equipment.

[0019] This invention, by setting up a vibration mechanism, can generate eddies by obstructing the antifreeze, thereby producing pulsating impacts. These impacts are transmitted to the fins through the antifreeze, which in turn vibrates and removes the frost in the molten state at the interface, preparing for the separation mechanism to blow off the frost, thus achieving the effect of long fin life.

[0020] The parts of this device not covered herein are the same as or can be implemented using existing technologies. This invention has a simple structure and is easy to operate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 2 This is a rear view schematic diagram of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment proposed in this invention. Figure 3 This is a schematic cross-sectional view of the main body of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 4 This is a schematic diagram of the fin structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 5 This is a schematic diagram of the multi-stage defrosting mechanism of an automatic defrosting device for gas-fired heat pumps based on low-temperature environments, as proposed in this invention. Figure 6 This is a schematic diagram of the return channel structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 7 This invention proposes an automatic defrosting device for gas-fired heat pumps based on low-temperature environments. Figure 6 Enlarged schematic diagram of the structure at point A in the middle; Figure 8 This is a schematic diagram of the vibration mechanism structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 9 This is a schematic diagram of the primary storage compartment structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 10 This is a schematic cross-sectional view of the fixed operating compartment of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 11 This is a schematic diagram of the branching channel structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 12 This is a schematic diagram of the sealed chamber structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 13This is a schematic diagram of the low-temperature flue gas duct structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 14 This is a schematic diagram of the fixed square plate structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 15 This is a schematic diagram of the fixed frame structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 16 This invention proposes an automatic defrosting device for gas-fired heat pumps based on low-temperature environments. Figure 15 Enlarged schematic diagram of the structure at point B; Figure 17 This is a schematic diagram of the nozzle structure of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention. Figure 18 This is a schematic diagram of the cross-sectional structure of the telescopic rod of an automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, as proposed in this invention.

[0022] In the diagram: 1. Main body of the equipment; 2. Control panel; 3. Multi-stage defrosting mechanism; 31. Delivery pump; 32. Centralized channel; 33. Liquid delivery channel; 34. Defrosting liquid channel; 35. Fixed frame; 36. Branching channel; 37. Return channel; 38. Branching return channel; 310. Primary storage compartment; 311. Connecting channel; 312. Secondary storage compartment; 313. Electric telescopic rod; 314. Sealed compartment; 315. Fixed block; 316. Fixed triangular body; 317. Connecting short channel; 318. Cone; 4. Low-temperature flue gas duct; 5. Flue gas conveying duct; 6. Fins; 7. Combustion chamber; 8. Vibration mechanism; 81. Fixed running chamber; 82. Force-bearing chamber; 83. Compression chamber; 84. Partition; 85. Slide groove; 86. Reciprocating spring; 87. Reciprocating telescopic rod; 88. Force-bearing block; 89. Force-bearing baffle; 810. Connecting short block; 9. Separation mechanism; 91. Fixed square plate; 92. Long groove; 93. Slot; 94. Sliding body; 95. Connecting flue; 96. Telescopic rod; 97. Fixed block; 98. Cooling plate; 99. Long rectangular body; 910. Short flue; 911. Groove; 912. Snap-fit ​​block; 913. Deceleration spring; 914. Deceleration slide; 915. Nozzle; 916. Protrusion; 921. Spring; 922. Connecting hole. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0025] Example: An automatic defrosting device for gas-fired heat pumps based on low-temperature environments, such as... Figures 1-18 As shown, the device includes a main body 1, with a control panel 2 fixedly installed on one side of the main body 1. The control panel 2 is used to control the operation of the multi-stage defrosting mechanism 3. The main body 1 has several fins 6 inside, which are fixedly installed on one side of the fixed square plate 91. The main body 1 has a low-temperature flue gas duct 4, a flue gas conveying duct 5, and a flue gas filter between the combustion chamber 7 and the low-temperature flue gas duct 4. The flue gas filter can filter the flue gas generated after combustion, thereby ensuring the cleanliness of the flue gas during defrosting. At the same time, the flue gas discharged from the flue gas conveying duct 5 meets environmental protection requirements. One end of the fins 6 is fixedly connected to the multi-stage defrosting mechanism 3. The main body 1 has a separation mechanism 9 inside, and the multi-stage defrosting mechanism 3 has a vibration mechanism 8 inside. The vibration mechanism 8 includes a fixed operating chamber 81, which contains a force-receiving chamber 82 and a compression chamber 83. The force-receiving chamber 82 is located above the compression chamber 83. A partition 84 is fixedly installed inside the fixed operating chamber 81, and a sliding groove 85 is formed through the partition 84. A force-receiving baffle 89 is slidably installed on the inner wall of the force-receiving chamber 82. The length of the force-receiving baffle 89 is greater than the length of the force-receiving block 88. Therefore, when the force-receiving baffle 89 is impacted by antifreeze, the force-receiving block 88 can only be subjected to the conveying pressure inside the pipeline. A force-receiving block 88 is slidably installed on the inner wall of the compression chamber 83, and a connecting short block 8 is fixedly installed on the upper side of the force-receiving block 88. 10. Sliding guide rods are installed on both sides of the connecting short block 810. The two ends of the two sliding guide rods away from the connecting short block 810 are slidably connected to the inner wall of the slide groove 85, thereby ensuring that the connecting short block 810 can slide stably and that the force baffle 89 and the force block 88 can slide stably. The end of the connecting short block 810 away from the force block 88 is fixedly connected to the lower surface of the force baffle 89. When the force baffle 89 is impacted by antifreeze, one end of the force baffle 89 is located outside the force cavity 82. When the force baffle 89 is not impacted by antifreeze, one end of the force baffle 89 is flush with the edge of the force cavity 82. A reciprocating telescopic rod 87 and a reciprocating spring 86 are fixedly installed on one side of the force-bearing block 88. The reciprocating telescopic rod 87 stabilizes the reciprocating spring 86. The ends of the reciprocating telescopic rod 87 and the reciprocating spring 86 away from the force-bearing block 88 are fixedly connected to the inner wall of the compression chamber 83, and the reciprocating spring 86 is sleeved on the outside of the reciprocating telescopic rod 87. When the force-bearing baffle 89 is directly impacted by antifreeze, the obstruction of the force-bearing baffle 89 increases the pressure inside the pipe at this point. At this time, the pressure is greater than the elastic force of the reciprocating spring 86. Therefore, when the force-bearing block 88 moves to be aligned with the edge of the force-bearing chamber 82, the antifreeze flows normally in this pipe, and the pressure decreases. At this time, the pressure is less than the elastic force of the reciprocating spring 86, and the reciprocating spring 86 unfolds. The force-bearing block 88 drives the force-bearing baffle 89 to move. When the force-bearing baffle 89 moves to the outside of the force-bearing chamber 82, the force-bearing baffle 89 again directly impacts the antifreeze, thus achieving reciprocating impact. The reciprocating impact causes the antifreeze to swirl and pulsate. Through the delivery of the antifreeze, the pulsating impact is transmitted to the fin 6, which vibrates and removes the frost that has been initially melted and then partially melted on the surface of the fin 6. The vibration force is slight, so it does not damage the fin 6. The frost that has undergone initial and secondary melting can form a water film on the surface of the fin 6. Therefore, the slight vibration allows it to slide off by gravity. The reciprocating spring 86 contracts, and the force baffle 89 moves. After the force baffle 89 moves, the side of the vibration mechanism 8 away from the connecting channel 311 is fixedly connected to the liquid delivery channel 33. The end of the liquid delivery channel 33 away from the vibration mechanism 8 is fixedly connected to the defrost liquid channel 34. The defrost liquid channel 34 is located inside the fixed frame 35. The defrost liquid channel 34 is inserted into the fin 6, and one end of the defrost liquid channel 34 extends to one side of the fin 6. The multi-stage defrosting mechanism 3 includes two symmetrically distributed electric telescopic rods 313. The electric telescopic rods 313 are controlled by the control panel 2. The end of each electric telescopic rod 313 away from the fixing block 315 is fixedly connected to the inner wall of the main body 1. Each of the two electric telescopic rods 313 has a primary storage chamber 310 and a secondary storage chamber 312 at one end. Fixing blocks 315 are fixedly installed on the surface of both the primary and secondary storage chambers 310 and 312 near the sealing chamber 314. The side of each fixing block 315 away from the primary and secondary storage chambers 310 and 312 is fixedly connected to one end of the electric telescopic rod 313. Two sets of connecting short channels 317 are fixedly installed on the side of the primary and secondary storage chambers 310 and 312 near the electric telescopic rods 313. Each set of connecting short channels 317 consists of two channels, symmetrically distributed. The primary storage chamber 310 is made of aluminum alloy, while the secondary storage chamber 312 is made of pure copper. Therefore, the heat absorption rate of the primary storage chamber 310 is lower than that of the secondary storage chamber 312. Thus, when defrosting the fins 6 with antifreeze, the primary storage chamber 310 is first placed against the combustion chamber 7. Because the primary storage chamber 310 conducts heat slowly, the temperature of the antifreeze inside it rises slowly, thus performing primary defrosting on the fins 6. Then, the secondary storage chamber 312 is placed against the combustion chamber 7. Because the secondary storage chamber 312 conducts heat quickly, the temperature of the antifreeze inside it rises quickly. Therefore, the antifreeze at this point heats and defrosts the fins 6 again after primary defrosting, achieving secondary defrosting. This achieves a preheating effect, preventing large temperature differences. One end of the connecting short channel 317 is provided with a sealing chamber 314. The other two sealing chambers 314 are connected to a branch channel 36 on one side. A central channel 32 is fixedly installed on the outside of the branch channel 36. A delivery pump 31 is fixedly connected to the end of the central channel 32 away from the branch channel 36. The delivery pump 31 is used to deliver antifreeze and is controlled by the control panel 2. A connecting channel 311 is fixedly installed at the output end of the delivery pump 31. One end of the connecting channel 311 is fixedly connected to one side surface of the vibration mechanism 8. One end of the connecting short channel 317 extends into the interior of the sealing chamber 314. A branch return channel 38 is fixedly installed on the side of the sealing chamber 314 away from the connecting short channel 317. A return channel 37 is fixedly installed on the outside of the branch return channel 38. A fixed frame 35 is fixedly connected to one end of the liquid delivery channel 33 and the return channel 37. A fixed square plate 91 is fixedly installed on the opposite sides of the two fixed frames 35. A slot 93 is provided on one side of the fixed square plate 91. Several elongated grooves 92 are provided on both sides of the slot 93. The liquid delivery channel 33 and the return channel 37 extend into the interior of the fixed square frame 35. The end of the return channel 37 away from the bifurcated return channel 38 is fixedly connected to one end of the defrost liquid channel 34. Both ends of the bifurcated return channel 38 extend into the interior of the sealing chamber 314. A fixed triangular body 316 is fixedly installed on the inner wall of the bifurcated return channel 38. A cone is fixedly installed on one side of the fixed triangular body 316. 318, by switching the electric telescopic rod 313, the cone 318 can enter the connecting short channel 317 and then complete the sealing of the pipeline, so that the coolant cannot flow, or the cone 318 can be disengaged from the state of insertion inside the connecting short channel 317, so that the coolant can flow. The cone 318 is inserted into the connecting short channel 317. The separation mechanism 9 includes a telescopic rod 96, and a fixing block 97 is fixedly installed on the upper end of the telescopic rod 96. The fixing block 97 is used to fix the operation of the telescopic rod 96. The side of the fixed block 97 away from the telescopic rod 96 is fixedly connected to the side of the slot 93. A spring 921 is fixedly installed on the inner wall of the telescopic rod 96. The elastic force of the spring 921 is less than the pressure of the flue gas entering the telescopic rod 96, and the elastic force of the spring 921 is greater than the friction between the locking block 912 and the long slot 92. A small connecting hole 922 is opened inside the telescopic rod 96 to allow the flue gas to enter, ensuring that the telescopic rod 96 can be smoothly extended when the internal pressure increases. The inside of the telescopic rod 96 is connected to the connecting flue pipe 95 and the inside of the short flue 910 through the connecting hole 922. A sliding body 94 is fixedly installed at the lower end of the telescopic rod 96. A connecting flue pipe 95 is fixedly installed on the side of the sliding body 94 away from the short flue 910. The connecting flue pipe 95 is made of stainless steel flexible metal and is connected to a high-temperature gas booster pump. The input end of the high-temperature gas booster pump is connected to the low-temperature flue duct 4. The connection is made of filtered gas inside the low-temperature flue duct 4. Therefore, the fins 6 are defrosted in three stages by the low-temperature gas to ensure the defrosting effect. At the same time, the temperature of the low-temperature gas is higher than the temperature of the antifreeze in the secondary defrosting, so the secondary defrosting also achieves the preheating effect. The temperature of the low-temperature flue gas is within a fixed range. Therefore, the temperature of the antifreeze in the primary defrosting and secondary defrosting can be controlled according to the fixed range of the low-temperature flue duct and the thermal conductivity of aluminum alloy and pure copper. The temperature control can be achieved by controlling the contact time between the primary storage chamber 310, the secondary storage chamber 312 and the combustion chamber 7. This is something that can be obtained by those skilled in the art without creative effort, so it will not be elaborated here. The sliding body 94 has grooves 911 at both opposite ends. The inner wall of the grooves 911 has a deceleration groove 914. The inner wall of the deceleration groove 914 is fixedly installed with a deceleration spring 913. A snap-fit ​​block 912 is fixedly installed at the end of the deceleration spring 913 away from the deceleration slide 914. The inner wall of the groove 911 is slidably connected to the outer side of the slot 93. A short flue 910 is fixedly installed on one side of the sliding body 94. A long rectangular body 99 is fixedly connected at the end of the short flue 910 away from the sliding body 94. A nozzle 915 is fixedly installed on the side of the long rectangular body 99 away from the short flue 910. The nozzle 915 is connected to the inside of the long rectangular body 99, and the long rectangular body 99 is connected to the inside of the short flue 910. A cold shield 98 is provided at one end of the nozzle 915. The cold shield 98 can prevent cold air from directly impacting the nozzle 915 during equipment operation, causing the nozzle 915 to frost and become blocked. Moreover, the internal temperature of the main body 1 of the equipment is above 0 degrees, so the nozzle 915 will not frost. The setting of the cold shield 98 can further prevent the nozzle 915 from frost. The opposite ends of the cooling plate 98 are fixedly connected to the inner wall of the fixed square plate 91, and the cooling plate 98 is located between the nozzle 915 and the fin 6. The opposite ends of the long rectangular body 99 are fixedly installed with protrusions 916. The protrusions 916 are adapted to slide with the protrusion grooves opened on the opposite sides of the fixed square frame 35, thereby ensuring the sliding stability of the long rectangular body 99. Among them, the flue gas filter cartridge, the high-temperature gas booster pump, and the control panel 2 are existing technologies and will not be described in detail here.

[0026] Working principle: When the equipment needs defrosting after running for a certain period of time, the control panel 2 first controls one of the electric telescopic rods 313 to operate. At this time, the electric telescopic rod 313 extends, and the fixed block 315 and the primary storage chamber 310 are pushed. At the same time, the primary storage chamber 310 drives the connecting short channel 317 to move, and then one end of the bifurcated return channel 38 and one end of the bifurcated channel 36 slide with the inside of the sealing chamber 314 respectively. At this time, through the movement of the bifurcated return channel 38 and the bifurcated channel 36, the cone 318 is disengaged from the inside of the connecting short channel 317, and the bifurcated return channel 38 and the bifurcated channel 314 slide with the inside of the sealing chamber 314. Channel 36 is connected to connecting short channel 317, which is always connected to the primary storage chamber 310 and the secondary storage chamber 312. At this time, the moving primary storage chamber 310 can come into contact with the surface of the combustion chamber 7. The temperature of the combustion chamber 7 surface can be transferred through the primary storage chamber 310 to the antifreeze inside, thus heating the antifreeze. At this time, the delivery pump 31 is activated, and the coolant inside the primary storage chamber 310 enters the branch channel 36. The coolant inside the defrost channel 34 and the return channel 37 enters the primary storage chamber 310, thus completing the circulation. The coolant inside the branch channel 36 enters the delivery pump 31 through the central channel 32, and then reaches the vibration mechanism 8 through the connecting channel 311. The initial state of the force-baffle 89 allows it to be directly impacted by the coolant, occupying a certain space in the pipe but not affecting the flow of coolant. Therefore, the coolant directly contacts one end of the force-baffle 89 and impacts it, increasing the pressure there. This pressure exceeds the pressure of the reciprocating spring 86, causing the reciprocating spring 86 to contract, the force block 88 to move, and the force-baffle 89 to move. When one end of the force-baffle 89 contacts the force-baffle 89... When the edge of the force chamber 82 is level, the pipeline pressure returns to normal. At this time, the reciprocating spring 86 unfolds, the force block 88 moves, the force baffle 89 moves, and the force baffle 89 moves to the outside of the force chamber 82. The antifreeze impacts the force baffle 89 again, which in turn generates pulse vibration. The vibration follows the antifreeze into the liquid delivery channel 33 and enters the defrost liquid channel 34 through the liquid delivery channel 33. The defrost liquid channel 34 is located inside the fin 6, so the vibration follows the antifreeze to this place. At this time, the frost on the surface of the fin 6 is initially defrosted, and at the same time, the frost that forms a water film between the fin 6 and the fin 6 is removed by the vibration. After the antifreeze inside the primary storage compartment 310 is circulated by the delivery pump 31 for a certain period of time, another electric telescopic rod 313 unfolds and then retracts, and the primary storage compartment 310 is separated from the combustion chamber 7. By reversing the above steps, the antifreeze inside the secondary storage compartment 312 can be circulated by the delivery pump 31, thereby achieving the purpose of secondary defrosting. After the antifreeze inside the secondary storage compartment 312 has been circulated for a certain period of time, the delivery pump 31 stops running. Simultaneously, the electric telescopic rod 313 retracts, disengaging the secondary storage compartment 312 from the surface of the combustion chamber 7, thus ending secondary defrosting. At the same time, the high-temperature gas booster pump is activated, allowing flue gas to enter the connecting flue pipe 95 through the high-temperature gas booster pump, and then into the sliding body 94. Simultaneously, some flue gas enters the telescopic rod 96. At this point, the flue gas pressure exceeds the spring force of the spring 921, causing the spring 921 to unfold, the telescopic rod 96 to unfold, and the sliding body 94 to move downwards. The locking block 912 engages with the inner wall of the long groove 92. Because the engagement point of the locking block 912 and the long groove 92 is inclined, and the locking block 912 is compressed, the pressure is transmitted to the deceleration spring 913. Therefore, the locking block 912 will reciprocate between engaging and disengaging from the long groove 92, thus achieving... The movement speed of the long rectangular body 99 is reduced, and the blowing time is increased. At the same time, the sliding body 94 moves, the short flue 910 moves, the long rectangular body 99 moves, and another part of the flue gas enters through the short flue 910 into the interior of the long rectangular body 99, and then is sprayed out from the nozzle 915, thereby melting and blowing away the stubborn frost on the surface of the fin 6. When the long rectangular body 99 completes one stroke, the high-temperature gas booster pump is turned off, the flue gas disappears, the spring 921 pulls the telescopic rod 96 to retract and reset, and the locking block 912 once again engages and disengages from the long groove 92, thereby reducing the contraction speed of the spring 921 and protecting the long rectangular body 99 from being impacted by rapid contraction. During contraction, the flue gas inside the telescopic rod 96 moves into the interior of the long rectangular body 99 and is then discharged from the nozzle 915, defrosting the surface of the fin 6 again. Thus, the frost on the surface of the fin 6 is completely removed at this time.

[0027] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An automatic defrosting device for a gas-fired heat pump based on a low-temperature environment, comprising a main body (1), a control panel (2) fixedly installed on one side of the main body (1), a plurality of fins (6) provided inside the main body (1), and a low-temperature flue gas duct (4), a flue gas conveying duct (5), and a combustion chamber (7) provided inside the main body (1), characterized in that, One end of the fin (6) is fixedly connected to a multi-stage defrosting mechanism (3), the main body of the equipment (1) is provided with a separation mechanism (9), and the multi-stage defrosting mechanism (3) is provided with a vibration mechanism (8). The multi-stage defrosting mechanism (3) includes two symmetrically distributed electric telescopic rods (313). One end of each electric telescopic rod (313) is provided with a primary storage compartment (310) and a secondary storage compartment (312). Two sets of connecting short channels (317) are fixedly installed on the side of the primary storage compartment (310) and the secondary storage compartment (312) near the electric telescopic rod (313). One end of each connecting short channel (317) is provided with a sealing compartment (314). One end extends into the interior of the sealing chamber (314), and a bifurcated return channel (38) is fixedly installed on the side of the sealing chamber (314) away from the connecting short channel (317). Both ends of the bifurcated return channel (38) extend into the interior of the sealing chamber (314). A fixed triangular body (316) is fixedly installed on the inner wall of the bifurcated return channel (38), and a cone (318) is fixedly installed on one side of the fixed triangular body (316). The cone (318) is inserted into the connecting short channel (317). The primary storage compartment (310) is made of aluminum alloy, and the secondary storage compartment (312) is made of pure copper. The separation mechanism (9) includes a telescopic rod (96), a sliding body (94) is fixedly installed at the lower end of the telescopic rod (96), a short flue (910) is fixedly installed on one side of the sliding body (94), a long rectangular body (99) is fixedly connected to the end of the short flue (910) away from the sliding body (94), a connecting flue (95) is fixedly installed on the side of the sliding body (94) away from the short flue (910), a nozzle (915) is fixedly installed on the side of the long rectangular body (99) away from the short flue (910), the nozzle (915) communicates with the interior of the long rectangular body (99), and the long rectangular body (99) communicates with the interior of the short flue (910). The connecting flue (95) is made of stainless steel metal hose and is connected to a high-temperature gas booster pump. The input end of the high-temperature gas booster pump is connected to the low-temperature flue (4).

2. The automatic defrosting device for a gas-fired heat pump based on a low-temperature environment according to claim 1, characterized in that, Each group of connecting short channels (317) consists of two, and they are symmetrically distributed. The other two sealed chambers (314) are connected to a branch channel (36) on one side. The primary storage chamber (310) and the secondary storage chamber (312) are both fixedly installed with fixing blocks (315) on the surface of the side of the primary storage chamber (310) and the secondary storage chamber (312) that are away from the sealing chamber (314). The side of the fixing block (315) away from the primary storage chamber (310) and the secondary storage chamber (312) is fixedly connected to one end of the electric telescopic rod (313). The end of the electric telescopic rod (313) away from the fixing block (315) is fixedly connected to the inner wall of the main body of the equipment (1).

3. The automatic defrosting device for a gas-fired heat pump based on a low-temperature environment according to claim 2, characterized in that, A return channel (37) is fixedly installed on the outside of the bifurcation return channel (38), and a central channel (32) is fixedly installed on the outside of the bifurcation channel (36). A delivery pump (31) is fixedly connected to the end of the central channel (32) away from the bifurcation channel (36). A connecting channel (311) is fixedly installed at the output end of the delivery pump (31). One end of the connecting channel (311) is fixedly connected to one side surface of the vibration mechanism (8). A liquid delivery channel (33) is fixedly connected to the side of the vibration mechanism (8) away from the connecting channel (311). A defrost liquid channel (34) is fixedly connected to the end of the liquid delivery channel (33) away from the vibration mechanism (8). The defrost liquid channel (34) is inserted into the fin (6), and one end of the defrost liquid channel (34) extends to one side of the fin (6). The end of the return channel (37) away from the bifurcation return channel (38) is fixedly connected to one end of the defrost liquid channel (34).

4. The automatic defrosting device for a gas-fired heat pump based on a low-temperature environment according to claim 1, characterized in that, The vibration mechanism (8) includes a fixed running chamber (81), which has a force-receiving chamber (82) and a compression chamber (83) inside. The force-receiving chamber (82) is located above the compression chamber (83). A partition (84) is fixedly installed inside the fixed running chamber (81), and a sliding groove (85) is opened through the partition (84). A force-receiving baffle (89) is slidably installed on the inner wall of the force-receiving chamber (82), and a force-receiving block (88) is slidably installed on the inner wall of the compression chamber (83).

5. The automatic defrosting device for a gas-fired heat pump based on a low-temperature environment according to claim 4, characterized in that, A connecting short block (810) is fixedly installed on the upper side of the force-bearing block (88). The end of the connecting short block (810) away from the force-bearing block (88) is fixedly connected to the lower surface of the force-bearing baffle (89). A reciprocating telescopic rod (87) and a reciprocating spring (86) are fixedly installed on one side of the force-bearing block (88). The ends of the reciprocating telescopic rod (87) and the reciprocating spring (86) away from the force-bearing block (88) are fixedly connected to the inner wall of the compression chamber (83), and the reciprocating spring (86) is sleeved on the outside of the reciprocating telescopic rod (87).

6. The automatic defrosting device for a gas-fired heat pump based on a low-temperature environment according to claim 3, characterized in that, One end of the liquid delivery channel (33) and the return channel (37) is fixedly connected to a fixed frame (35), and the liquid delivery channel (33) and the return channel (37) extend into the fixed frame (35), and the defrost liquid channel (34) is located inside the fixed frame (35).

7. The automatic defrosting device for a gas-fired heat pump based on a low-temperature environment according to claim 6, characterized in that, Two fixed square frames (35) are fixedly mounted on their opposite sides with fixed square plates (91). The fins (6) are fixedly mounted on one side of the fixed square plates (91). A slot (93) is provided on one side of the fixed square plates (91). Several long slots (92) are provided on both opposite sides of the slots (93). Grooves (911) are provided at both opposite ends of the sliding body (94). The inner wall of the groove (911) is slidably connected to the outer side of the slot (93).

8. The automatic defrosting device for a gas-fired heat pump based on a low-temperature environment according to claim 7, characterized in that, The inner wall of each groove (911) is provided with a deceleration groove (914), and a deceleration spring (913) is fixedly installed on the inner wall of the deceleration groove (914). A snap-fit ​​block (912) is fixedly installed on the end of the deceleration spring (913) away from the deceleration groove (914).

9. The automatic defrosting device for a gas-fired heat pump based on a low-temperature environment according to claim 7, characterized in that, A fixing block (97) is fixedly installed on the upper end of the telescopic rod (96). The side of the fixing block (97) away from the telescopic rod (96) is fixedly connected to the side of the slot (93). A spring (921) is fixedly installed on the inner wall of the telescopic rod (96). A small connecting hole (922) is opened inside the telescopic rod (96). The inside of the telescopic rod (96) is connected to the connecting pipe (95) and the inside of the short flue (910) through the small connecting hole (922).

10. The automatic defrosting device for a gas-fired heat pump based on a low-temperature environment according to claim 7, characterized in that, One end of the nozzle (915) is provided with a cooling plate (98), and the opposite ends of the cooling plate (98) are fixedly connected to the inner wall of the fixed square plate (91). The cooling plate (98) is located between the nozzle (915) and the fin (6). The opposite ends of the long rectangular body (99) are fixedly installed with protrusions (916).

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