An evaporator in a heating and ventilation equipment

Abstract

The present invention discloses an evaporator for HVAC equipment, belonging to the field of evaporators, and comprising an outer frame, a heat conducting plate fixedly connected to the inner surface of the outer frame, an evaporation tube fixedly connected to the outer surface of the heat conducting plate, both ends of the evaporation tube extending to the right side of the outer frame, and a sealing assembly provided on the underside of the evaporation tube. The sealing assembly includes a liquid outlet pipe fixedly connected to the evaporation tube, and a flange 1 fixedly connected to the right end of the liquid outlet pipe. By providing the sealing assembly, the low thermal conductivity and thermal expansion coefficient of inert gas are utilized to enable the sealing ring to continuously maintain a full state under the support of the inert gas, thereby effectively reducing the deformation of the sealing ring due to contraction when exposed to cold, effectively reducing the impact of temperature changes on the sealing performance of the pipe connection, and effectively reducing the probability of leakage at the connection between flange 1 and flange 2, thereby ensuring the operational stability of the HVAC evaporator.

Description

Technical Field

[0001] The present invention relates to the field of evaporators, and more particularly to an evaporator in a heating and ventilation device. Background Art

[0002] HVAC equipment is a system or related equipment used for indoor heating, cooling, ventilation and air conditioning. The evaporator is a key component in the refrigeration system. As a cooling output device, the evaporator absorbs heat from the low-temperature heat source medium (such as water or air) during the evaporation of the refrigerant to achieve the purpose of cooling and cooling. Therefore, the performance of the evaporator directly affects the cooling effect and energy efficiency of the entire HVAC system.

[0003] Chinese patent publication number CN213778244U discloses a universal heating evaporator that is easy to install. The serpentine heat exchange tubes, insulation chamber, insulation sleeve, and insulation foam are provided to insulate the serpentine heat exchange tubes, reduce the heat dissipated by the serpentine heat exchange tubes from the outside, and increase the heat exchange efficiency during operation of the universal heating evaporator.

[0004] During the operation of the HVAC evaporator, liquid refrigerant enters the evaporator and absorbs heat to evaporate into gas. During the evaporation process, the refrigerant absorbs a large amount of heat. In order to ensure the continuous operation of the evaporator, it is necessary to continuously inject refrigerant into the evaporator and discharge the gaseous refrigerant and the refrigerant that has not been completely evaporated in time for separation and recovery. During the circulation of the evaporator, the temperature at the outlet of the evaporator will be significantly lower than the temperature at the inlet.

[0005] During the installation of the evaporator in the prior art, the refrigerant input and output pipes are usually installed with flanges, and the flanges are sealed with sealing rings. The flanges at the refrigerant output end will shrink due to thermal expansion and contraction, so gaps are likely to appear between the two sets of flanges. The gaseous evaporant will leak through the gaps, thereby affecting the sealing and stability of the evaporator during operation, and posing certain safety hazards in actual application. Summary of the Invention

[0006] In response to the problems existing in the prior art, the purpose of the present invention is to provide an evaporator in HVAC equipment, which can achieve this by setting a sealing component and utilizing the low thermal conductivity and thermal expansion coefficient of the inert gas, so that the sealing ring can continuously maintain a filled state under the support of the inert gas, thereby effectively reducing the deformation of the sealing ring when it shrinks when it is cold, thereby effectively reducing the impact of temperature changes on the sealing of the pipe connection, and effectively reducing the probability of leakage at the connection between flange one and flange two, thereby ensuring the operational stability of the HVAC evaporator.

[0007] To solve the above problems, the present invention adopts the following technical solutions.

[0008] An evaporator in a heating and ventilation device comprises an outer frame, a heat conducting plate fixedly connected to the inner surface of the outer frame, an evaporation tube fixedly connected to the outer surface of the heat conducting plate, both ends of the evaporation tube extending to the right side of the outer frame, and a sealing assembly provided on the lower side of the evaporation tube;

[0009] The sealing assembly includes a liquid outlet pipe fixedly connected to the evaporating tube, a first flange fixedly connected to the right end of the liquid outlet pipe, a second flange for sealing the liquid outlet pipe connection is provided on the left side of the first flange, and a connecting pipe is fixedly connected to the outer surface of the right end of the second flange;

[0010] The outer surfaces of the flange plate 1 and the flange plate 2 are both embedded with sealing grooves, the inner sides of the sealing grooves are provided with sealing rings, the inner sides of the sealing rings are embedded with a cavity, and the interior of the cavity is filled with inert gas.

[0011] Furthermore, the number of the heat conducting plates is several groups and they are distributed in parallel, the evaporating tube is a disc-shaped structure, the flange plate 1 and the flange plate 2 are symmetrically distributed, the sealing groove and the sealing ring are both annular, and the sealing ring is made of elastic material.

[0012] Furthermore, the inner sides of flange 1 and flange 2 are both embedded with a receiving groove, the receiving groove is connected to the inside of the sealing groove, the inner side of the receiving groove is fixedly connected to a heat-expandable metal sheet, the heat-expandable metal sheet has a U-shaped structure, the heat-expandable metal sheet is fixedly connected to the sealing ring on the side away from the receiving groove, the inner side of the heat-expandable metal sheet is fixedly connected to a spring, and the number of the heat-expandable metal sheets and springs is several groups and distributed in a ring array.

[0013] Furthermore, the outer surfaces of flange 1 and flange 2 are respectively provided with mounting holes, the number of the mounting holes is several groups and distributed in a ring array, bolts are provided on the inner sides of the mounting holes, and locking nuts are threadedly connected to the outer surfaces of the bolts.

[0014] Furthermore, the outer surface of the liquid outlet pipe is fixedly connected to a connecting seat, the outer surface of the connecting seat is spirally connected to a spiral seat, the outer surface of the right end of the spiral seat is rotatably connected to a retaining ring, the retaining ring is annular, and the outer surface of the retaining ring is connected to a limiting plate.

[0015] Furthermore, a limiting groove is provided on the outer surface of the left end of the bolt, and the limiting plate is engaged with the inner side of the limiting groove and is in sliding contact with the inner surface of the limiting groove. The number of the limiting plates is several groups and distributed in a ring array, and the right end of the limiting plate is in contact with the outer surface of the left end of the locking nut.

[0016] Furthermore, a back plate is fixedly connected to the outer surface of the rear end of the outer frame, a fixed sleeve is fixedly connected to the outer surface of the rear end of the back plate, an air intake grille is provided on the outer surface of the fixed sleeve, the air intake grille is distributed in a circular shape, and an air intake fan is provided on the inner side of the fixed sleeve.

[0017] Furthermore, the upper end of the evaporating tube is fixedly connected to a liquid inlet pipe, the right end of the liquid inlet pipe is fixedly connected to a connecting flange, the liquid inlet pipe is located directly above the liquid outlet pipe, a purification component is provided on the inside of the liquid inlet pipe, and the purification component includes a support frame fixedly connected to the inner surface of the liquid inlet pipe.

[0018] Furthermore, the support frame is fixedly connected to a support seat on the side away from the liquid inlet pipe, the support seat is in a circular ring shape, the inner surface of the support seat is rotatably connected to a rotating shaft, the outer surface of the rotating shaft is fixedly connected to a fixed block, the outer surface of the fixed block is fixedly connected to a blade, and the number of the blades is several groups and distributed in a ring array.

[0019] Furthermore, a scale-inhibiting net is fixedly connected to the inner surface of the liquid inlet pipe, a scraper is fixedly connected to the right side of the outer surface of the rotating shaft, the scraper is in rotational contact with the outer surface of the scale-inhibiting net, a conduit is fixedly connected to the lower side of the outer surface of the liquid inlet pipe, the lower end of the conduit is fixedly connected to a storage tank, the outer surface of the lower end of the storage tank is fixedly connected to a sewage pipe, and the inner surface of the conduit is fixedly connected to a one-way valve.

[0020] Compared with the prior art, the advantages of the present invention are:

[0021] (1) This solution sets up a sealing component and utilizes the low thermal conductivity and thermal expansion coefficient of the inert gas to enable the sealing ring to continuously maintain a full state under the support of the inert gas, thereby effectively reducing the deformation of the sealing ring when it contracts when it is cold, thereby effectively reducing the impact of temperature changes on the sealing of the pipe connection, and effectively reducing the probability of leakage at the connection between flange 1 and flange 2, thereby ensuring the operational stability of the HVAC evaporator;

[0022] (2) This solution provides components such as heat-expandable metal sheets and springs, and uses the heat-expandable metal sheets to pull and stretch the sealing ring, thereby keeping the sealing ring in an expanded state. By further reducing the shrinkage of the sealing ring, the sealing ring can be kept in a tightly fitted state with flange 1 and flange 2, thereby further reducing the probability of a gap between the sealing ring and flange 1 and flange 2, and thus significantly improving the sealing effect of the connection between flange 1 and flange 2.

[0023] (3) This solution provides components such as a limit plate, a retaining ring, and a limit groove, and locks and fixes the bolts by engaging the limit plate and the limit groove, thereby reducing the probability of accidental rotation of the bolts. The limit plate can prevent the locking nut from loosening and falling off, thereby reducing the probability of loosening between the bolts and the locking nut. This not only reduces the impact of temperature changes on the sealing of the HVAC evaporator and reduces the probability of accidental leakage of the evaporator, but also effectively improves the operating stability of the HVAC evaporator. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 ;

[0025] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 ;

[0026] Figure 3 It is a right side view of the overall structure of the present invention;

[0027] Figure 4 For the present invention Figure 2 Middle AA section view;

[0028] Figure 5 For the present invention Figure 3 Middle BB section view;

[0029] Figure 6 For the present invention Figure 5 Enlarged schematic diagram at point C in the middle;

[0030] Figure 7 For the present invention Figure 5 The enlarged schematic diagram of point D in the middle;

[0031] Figure 8 For the present invention Figure 5 Enlarged schematic diagram at point E in the middle.

[0032] Description of the numbers in the figure:

[0033] 11. Outer frame; 12. Heat conducting plate; 13. Evaporating tube; 14. Back plate; 15. Fixing sleeve; 16. Air intake grille; 17. Air intake fan; 18. Liquid inlet pipe; 19. Connecting flange; 20. Support frame; 21. Support seat; 22. Rotating shaft; 23. Scraper; 24. Scale inhibitor; 25. Paddle; 26. Fixing block; 27. Conduit; 28. One-way valve; 29. Storage tank; 30. Drain pipe; 31. Liquid outlet pipe; 32. Connecting seat; 33. Screw seat; 34. Retaining ring; 35. Limiting plate; 36. Locking nut; 37. Bolt; 38. Limiting groove; 39. Flange 1; 40. Mounting hole; 41. Flange 2; 42. Connecting pipe; 43. Sealing groove; 44. Sealing ring; 45. Storage groove; 46. Thermal expansion metal sheet; 47. Spring; 48. Cavity. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0035] See also Figures 1 to 8 An evaporator in a heating and ventilation device includes an outer frame 11, a heat conducting plate 12 is fixedly connected to the inner surface of the outer frame 11, an evaporation tube 13 is fixedly connected to the outer surface of the heat conducting plate 12, both ends of the evaporation tube 13 pass through the right side of the outer frame 11, and a sealing component is provided on the lower side of the evaporation tube 13;

[0036] The sealing assembly includes a liquid outlet pipe 31 fixedly connected to the evaporation tube 13. A flange 1 39 is fixedly connected to the right end of the liquid outlet pipe 31. A flange 2 41 is provided on the left side of the flange 1 39 for sealing the liquid outlet pipe 31. A connecting pipe 42 is fixedly connected to the outer surface of the right end of the flange 2 41.

[0037] The outer surfaces of the flange 1 39 and the flange 2 41 are both embedded with a sealing groove 43, a sealing ring 44 is provided inside the sealing groove 43, a cavity 48 is embedded inside the sealing ring 44, and the cavity 48 is filled with inert gas.

[0038] The heat conducting plates 12 are arranged in several groups and are distributed in parallel. The evaporating tube 13 is a disc-shaped structure. The flange 1 39 and the flange 2 41 are symmetrically distributed. The sealing groove 43 and the sealing ring 44 are both annular. The sealing ring 44 is made of elastic material.

[0039] The evaporator 13 is fixedly supported by the outer frame 11 and the heat conducting plate 12. In order to ensure the circulation of the low-temperature evaporant during operation, the low-temperature evaporant needs to be continuously injected into the evaporator tube 13 through the pipeline. The evaporant will evaporate during the flow of the evaporator tube 13. The heat conducting plate 12 is outside the evaporator tube 13 and the evaporant absorbs heat and evaporates, thereby reducing the temperature of the heat conducting plate 12. The parallel distribution of the heat conducting plates 12 can effectively improve the heat transfer efficiency. The evaporator tube 13 is arranged in a coil shape, which can effectively increase the contact range with the heat conducting plate 12, thereby effectively improving the evaporation and cooling effect of the HVAC evaporator, and timely discharge the evaporant inside the evaporator tube 13. The evaporant evaporates and absorbs heat, so that the temperature at the discharge end of the evaporator tube 13 will be significantly lower than the temperature at the feed end. The liquid outlet pipe 31 is fixedly connected to the connecting pipe 42 through the flange 1 39 and the flange 2 41. The surfaces of the flange 1 39 and the flange 2 41 are in contact and under the action of the sealing ring 44 The flange 1 39 and the flange 2 41 are sealed. Due to the effects of thermal expansion and contraction, a gap will appear between the contact surfaces of the flange 1 39 and the flange 2 41, which will cause leakage of the gaseous refrigerant between the flange 1 39 and the flange 2 41. For this purpose, a sealing component is provided. When the flange 1 39 and the flange 2 41 contract when cooled, the inert gas inside the sealing ring 44 has low thermal conductivity and thermal expansion coefficient. Therefore, the sealing ring 44 can be continuously kept filled under the support of the inert gas inside its cavity 48. The inert gas inside the sealing ring 44 can be filled with nitrogen, argon, etc., which can effectively reduce the deformation of the sealing ring 44 when it contracts when cooled, so that the sealing ring 44 can continue to play a sealing effect between the flange 1 39 and the flange 2 41. By reducing the influence of temperature changes on the sealing of the pipeline connection, the probability of leakage at the connection between the flange 1 39 and the flange 2 41 can be effectively reduced, thereby ensuring the operational stability of the HVAC evaporator.

[0040] like Figure 1 、 Figure 2 、 Figure 5 and Figure 7 As shown, the inner sides of the flange 1 39 and the flange 2 41 are both embedded with a receiving groove 45, and the receiving groove 45 is communicated with the inside of the sealing groove 43. A heat-expandable metal sheet 46 is fixedly connected to the inner side of the receiving groove 45. The heat-expandable metal sheet 46 has a U-shaped structure, and the heat-expandable metal sheet 46 is fixedly connected to the sealing ring 44 on the side away from the receiving groove 45. A spring 47 is fixedly connected to the inner side of the heat-expandable metal sheet 46. The number of the heat-expandable metal sheets 46 and the springs 47 is several groups and distributed in a ring array.

[0041] By adopting the above technical solution, the receiving groove 45 on the inner side of the flange 39 is used to store and support the thermal expansion metal sheet 46. The thermal expansion metal sheet 46 is in a U-shaped structure and is formed by composite pressing of two groups of metals with different thermal expansion coefficients. The thermal expansion coefficient of the metal inside the U-shaped thermal expansion metal sheet 46 is greater than that of the metal outside. The thermal expansion metal sheet 46 maintains close contact with the sealing ring 44 under the action of the spring 47 and its own elastic force. When the temperature of the thermal expansion metal sheet 46 decreases, since the thermal expansion coefficient of the metal inside the U-shaped thermal expansion metal sheet 46 is greater than that of the metal outside, the contraction deformation of the metal inside the thermal expansion metal sheet 46 will The shrinkage deformation of the outer metal sheet is greater than that of the outer metal sheet. At this time, the bending angle of the thermally expandable metal sheet 46 will gradually decrease, and the thermally expandable metal sheet 46 will continue to maintain a contracted state. The thermally expandable metal sheet 46 will pull and stretch the sealing ring 44, so that the sealing ring 44 will continue to maintain an expanded state. By further reducing the shrinkage of the sealing ring 44, the sealing ring 44 and the flange 1 39 and the flange 2 41 can be kept in a tight fit, thereby further reducing the probability of gaps between the sealing ring 44 and the flange 1 39 and the flange 2 41, and thus significantly improving the sealing effect at the connection between the flange 1 39 and the flange 2 41.

[0042] like Figure 1 、 Figure 2 、 Figure 5 and Figure 8 As shown, the outer surfaces of flange 1 39 and flange 2 41 are respectively provided with mounting holes 40 , and the mounting holes 40 are in several groups and distributed in a ring array. Bolts 37 are provided inside the mounting holes 40 , and the outer surfaces of the bolts 37 are threadedly connected with locking nuts 36 .

[0043] The outer surface of the liquid outlet pipe 31 is fixedly connected to a connecting seat 32, the outer surface of the connecting seat 32 is spirally connected to a spiral seat 33, the outer surface of the right end of the spiral seat 33 is rotatably connected to a retaining ring 34, the retaining ring 34 is annular, and the outer surface of the retaining ring 34 is connected to a limiting plate 35.

[0044] A limiting groove 38 is provided on the outer surface of the left end of the bolt 37, and the limiting plate 35 is engaged with the inner side of the limiting groove 38 and is in sliding contact with the inner surface of the limiting groove 38. The limiting plates 35 are provided in several groups and are distributed in a ring array, and the right end of the limiting plate 35 is in contact with the outer surface of the left end of the locking nut 36.

[0045] When the flange 1 39 and the flange 2 41 are connected, the bolts 37 are passed through the mounting holes 40 on the outer surfaces of the flange 1 39 and the flange 2 41, and then the locking nuts 36 are threadedly connected to the bolts 37. The locking nuts 36 cooperate with the bolts 37 to fasten the flange 1 39 and the flange 2 41, so that the outer surfaces of the flange 1 39 and the flange 2 fit tightly. During the start-up and shutdown of the HVAC evaporator, the flange 1 39 and the flange 2 41 will experience alternating hot and cold changes. The temperature change will cause the bolts 37 and the locking nuts 36 to loosen due to the effect of thermal expansion and contraction, thereby loosening the connection between the flange 1 39 and the flange 2 41, which will affect the sealing of the connection between the flange 1 39 and the flange 2 41. For this purpose, components such as the retaining ring 34 and the limit plate 35 are provided. After the bolts 37 and the locking nuts 36 are assembled, the operator rotates the screw seat 33, and the liquid outlet pipe 3 The screw seat 33 is movably supported by the connecting seat 32. The screw seat 33 is connected to the connecting seat 32 through a spiral transmission. During the rotation process, the screw seat 33 drives the retaining ring 34 to move synchronously, thereby driving the limit plate 35 to move to the inside of the limit groove 38 at the left end of the bolt 37 through the retaining ring 34. The bolt 37 is locked and fixed by the engagement of the limit plate 35 and the limit groove 38, which can reduce the probability of accidental rotation of the bolt 37. At the same time, the left end of the limit plate 35 is tightly fitted into the outer surface of the locking nut 36. Under the obstruction of the limit plate 35, the locking nut 36 can be prevented from loosening and falling off, thereby reducing the probability of loosening between the bolt 37 and the locking nut 36. This can not only reduce the influence of temperature alternation on the sealing of the HVAC evaporator and reduce the probability of accidental leakage of the evaporator, but also effectively improve the operating stability of the HVAC evaporator.

[0046] like Figure 3 and Figure 4 As shown, the rear end outer surface of the outer frame 11 is fixedly connected to a back plate 14, the rear end outer surface of the back plate 14 is fixedly connected to a fixing sleeve 15, the outer surface of the fixing sleeve 15 is provided with an air intake grille 16, the air intake grille 16 is distributed in a circular ring shape, and an air intake fan 17 is provided inside the fixing sleeve 15.

[0047] By adopting the above technical solution, when the HVAC evaporator is working, the air intake fan 17 is started and operated, and the outer frame 11 supports the fixed sleeve 15 through the back plate 14, so that the air intake fan 17 is fixedly connected through the fixed sleeve 15. As the air intake fan 17 runs, the external air is sucked into the fixed sleeve 15 through the air intake grille 16, and then the air is blown by the air intake fan 17. The air will fully contact the outer surface of the heat conducting plate 12, and the gas will be cooled and lowered by the heat conducting plate 12. The cooled gas is then ejected outward from the front side of the evaporator, and the surrounding environment is cooled and lowered by the gas, thereby achieving smooth operation of the HVAC evaporator.

[0048] like Figure 3 、 Figure 5 and Figure 6 As shown, the upper end of the evaporation tube 13 is fixedly connected to a liquid inlet pipe 18, the right end of the liquid inlet pipe 18 is fixedly connected to a connecting flange 19, the liquid inlet pipe 18 is located directly above the liquid outlet pipe 31, and a purification component is provided on the inner side of the liquid inlet pipe 18, and the purification component includes a support frame 20 fixedly connected to the inner surface of the liquid inlet pipe 18.

[0049] The support frame 20 is fixedly connected to a support base 21 on the side away from the liquid inlet pipe 18. The support base 21 is annular. The inner surface of the support base 21 is rotatably connected to a rotating shaft 22. The outer surface of the rotating shaft 22 is fixedly connected to a fixed block 26. The outer surface of the fixed block 26 is fixedly connected to a paddle 25. The number of the paddles 25 is several groups and distributed in a ring array.

[0050] The inner surface of the liquid inlet pipe 18 is fixedly connected to a scale-inhibiting net 24, the right side of the outer surface of the rotating shaft 22 is fixedly connected to a scraper 23, and the scraper 23 is in rotational contact with the outer surface of the scale-inhibiting net 24. The lower side of the outer surface of the liquid inlet pipe 18 is fixedly connected to a conduit 27, the lower end of the conduit 27 is fixedly connected to a storage tank 29, the outer surface of the lower end of the storage tank 29 is fixedly connected to a sewage pipe 30, and the inner surface of the conduit 27 is fixedly connected to a one-way valve 28.

[0051] By adopting the above technical solution, the connecting flange 19 is used to connect the liquid inlet pipe 18 with the evaporant delivery pipe. When the liquid evaporant enters the liquid inlet pipe 18, the scale inhibitor 24 can effectively filter the dirt in the liquid evaporant, thereby effectively reducing the dirt from entering the evaporation pipe 13. By reducing the probability of scale generation on the inner wall of the evaporation pipe 13, while ensuring the heat conduction efficiency of the evaporation pipe 13, it can also effectively reduce the workload of cleaning the inner wall of the evaporation pipe 13. The evaporant will impact the blade 25 during the flow process, and the blade 25 drives the rotating shaft 22 to rotate through the fixed block 26. The liquid inlet pipe 18 The support frame 20 fixes the support seat 21, and the support seat 21 rotationally supports the rotating shaft 22. The rotating shaft 22 will drive the scraper 23 to rotate synchronously during the rotation, thereby effectively reducing the adhesion of dirt on the surface of the scale inhibition net 24, and thus maintaining the filtering effect of the scale inhibition net 24. Some dirt will enter the storage tank 29 through the conduit 27 and the one-way valve 28 inside it under the action of gravity. The one-way valve 28 can prevent the dirt from flowing back into the liquid inlet pipe 18 again. A gate valve for opening and closing is provided inside the sewage pipe 30. By opening the gate valve, the dirt inside the storage tank 29 can be effectively discharged.

[0052] Instructions for use: When the HVAC evaporator is working, the low-temperature evaporant is continuously injected into the evaporation tube 13 through the liquid inlet pipe 18. The evaporant will evaporate and absorb heat during the flow process, and then the evaporant inside the evaporation tube 13 will be discharged in time. The evaporant evaporates and absorbs heat, so that the temperature of the discharge end of the evaporation tube 13 will be significantly lower than the temperature of the feed end. The inert gas inside the sealing ring 44 has low thermal conductivity and thermal expansion coefficient. Therefore, the sealing ring 44 can continuously maintain a full state under the support of the inert gas inside its cavity 48. When the temperature drops, the thermal expansion coefficient of the metal inside the U-shaped thermal expansion metal sheet 46 is greater than the thermal expansion coefficient of the metal outside the U-shaped thermal expansion metal sheet 46, and the contraction deformation of the metal inside the thermal expansion metal sheet 46 The amount will be greater than the shrinkage deformation of the outer metal sheet, and the sealing ring 44 is pulled and stretched by the thermal expansion metal sheet 46, so that the sealing ring 44 continues to maintain the expanded state, thereby further reducing the probability of gaps between the sealing ring 44 and the flange 1 39 and the flange 2 41. The blocking of the limit plate 35 can prevent the locking nut 36 from loosening and falling off, thereby reducing the probability of loosening between the bolt 37 and the locking nut 36. It can not only reduce the impact of temperature alternation on the sealing of the HVAC evaporator, but the scale prevention net 24 can effectively filter the dirt in the liquid evaporant, thereby effectively reducing the dirt from entering the interior of the evaporator tube 13, thereby reducing the probability of scale generation on the inner wall of the evaporator tube 13.

[0053] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. An evaporator in a heating and ventilation device, comprising an outer frame (11), characterized in that: The inner surface of the outer frame (11) is fixedly connected to a heat conducting plate (12), the outer surface of the heat conducting plate (12) is fixedly connected to an evaporation tube (13), both ends of the evaporation tube (13) pass through the right side of the outer frame (11), and a sealing component is provided on the lower side of the evaporation tube (13); The sealing assembly includes a liquid outlet pipe (31) fixedly connected to the evaporation pipe (13), a flange plate 1 (39) fixedly connected to the right end of the liquid outlet pipe (31), a flange plate 2 (41) for connecting and sealing the liquid outlet pipe (31) is provided on the left side of the flange plate 1 (39), and a connecting pipe (42) is fixedly connected to the outer surface of the right end of the flange plate 2 (41); The outer surfaces of the flange plate 1 (39) and the flange plate 2 (41) are both embedded with a sealing groove (43), a sealing ring (44) is provided inside the sealing groove (43), a cavity (48) is embedded inside the sealing ring (44), and the cavity (48) is filled with an inert gas; The inner sides of the flange plate 1 (39) and the flange plate 2 (41) are both embedded with a receiving groove (45), the receiving groove (45) is communicated with the inside of the sealing groove (43), the inner side of the receiving groove (45) is fixedly connected with a heat expansion metal sheet (46), the heat expansion metal sheet (46) is in a U-shaped structure, the side of the heat expansion metal sheet (46) away from the receiving groove (45) is fixedly connected to the sealing ring (44), the inner side of the heat expansion metal sheet (46) is fixedly connected with a spring (47), the number of the heat expansion metal sheets (46) and the spring (47) is several groups and distributed in a ring array.

2. The evaporator in the HVAC equipment according to claim 1, characterized in that: The number of the heat conducting plates (12) is several groups and they are distributed in parallel. The evaporating tube (13) is a disc-shaped structure. The flange plate 1 (39) and the flange plate 2 (41) are symmetrically distributed. The sealing groove (43) and the sealing ring (44) are both annular. The sealing ring (44) is made of elastic material.

3. The evaporator in the HVAC equipment according to claim 1, characterized in that: The outer surfaces of the flange plate 1 (39) and the flange plate 2 (41) are respectively provided with mounting holes (40), and the number of the mounting holes (40) is several groups and distributed in a ring array. Bolts (37) are provided inside the mounting holes (40), and the outer surfaces of the bolts (37) are threadedly connected with locking nuts (36).

4. The evaporator in the HVAC equipment according to claim 3, characterized in that: The outer surface of the liquid outlet pipe (31) is fixedly connected to a connecting seat (32), the outer surface of the connecting seat (32) is spirally connected to a spiral seat (33), the outer surface of the right end of the spiral seat (33) is rotatably connected to a retaining ring (34), the retaining ring (34) is annular, and the outer surface of the retaining ring (34) is connected to a limiting plate (35).

5. The evaporator in the HVAC equipment according to claim 4, characterized in that: A limiting groove (38) is provided on the outer surface of the left end of the bolt (37), and the limiting plate (35) is engaged with the inner side of the limiting groove (38) and is in sliding contact with the inner surface of the limiting groove (38). The limiting plates (35) are provided in a plurality of groups and are distributed in a ring array, and the right end of the limiting plate (35) is in contact with the outer surface of the left end of the locking nut (36).

6. The evaporator in the HVAC equipment according to claim 5, characterized in that: The outer surface of the rear end of the outer frame (11) is fixedly connected to a back plate (14), the outer surface of the rear end of the back plate (14) is fixedly connected to a fixing sleeve (15), the outer surface of the fixing sleeve (15) is provided with an air intake grille (16), the air intake grille (16) is distributed in a circular ring shape, and an air intake fan (17) is provided inside the fixing sleeve (15).

7. The evaporator in the HVAC equipment according to claim 6, characterized in that: The upper end of the evaporating tube (13) is fixedly connected to a liquid inlet pipe (18), the right end of the liquid inlet pipe (18) is fixedly connected to a connecting flange (19), the liquid inlet pipe (18) is located directly above the liquid outlet pipe (31), and a purification component is provided inside the liquid inlet pipe (18), the purification component including a support frame (20) fixedly connected to the inner surface of the liquid inlet pipe (18).

8. The evaporator in the HVAC equipment according to claim 7, characterized in that: The support frame (20) is fixedly connected to a support seat (21) on a side away from the liquid inlet pipe (18). The support seat (21) is annular. The inner surface of the support seat (21) is rotatably connected to a rotating shaft (22). The outer surface of the rotating shaft (22) is fixedly connected to a fixed block (26). The outer surface of the fixed block (26) is fixedly connected to a paddle (25). The paddles (25) are arranged in a plurality of groups and are distributed in an annular array.

9. The evaporator in the HVAC equipment according to claim 8, characterized in that: The inner surface of the liquid inlet pipe (18) is fixedly connected to a scale-inhibiting net (24); the right side of the outer surface of the rotating shaft (22) is fixedly connected to a scraper (23); the scraper (23) is in rotational contact with the outer surface of the scale-inhibiting net (24); the lower side of the outer surface of the liquid inlet pipe (18) is fixedly connected to a conduit (27); the lower end of the conduit (27) is fixedly connected to a material storage tank (29); the outer surface of the lower end of the material storage tank (29) is fixedly connected to a sewage pipe (30); and the inner surface of the conduit (27) is fixedly connected to a one-way valve (28).

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