Environmentally friendly and energy-saving heat exchange device for HVAC

Abstract

The present invention relates to the technical field of heat exchange devices, specifically to an environmentally friendly and energy-saving heat exchange device for heating, ventilation and air conditioning, comprising a heat exchange tube and a plurality of heat sinks, the heat exchange tube is arranged in a serpentine shape on the plurality of heat sinks, a cleaning unit is provided inside the heat exchange tube for sliding, the cleaning unit comprises a ring body, the circumferential sliding of the ring body is matched with a sleeve ring, a plurality of paddles are provided on both sides of the ring body, and a paddle plate is provided on one end of the paddle plate facing the inner diameter of the ring body; connecting elbows are installed at both ends of the heat exchange tube, a three-way pipe is fixedly connected to one end of the connecting elbow, a conversion box is fixedly connected between the two three-way pipes, and a first liquid pipe and a second liquid pipe are respectively rotatably connected inside the conversion box. In the present invention, water flows inside the heat exchange tube through the middle of the ring body, so that the paddle plate drives the paddle plate to swing, so that the brush on the paddle plate cleans the inner wall of the heat exchange tube, and at the same time, the first liquid pipe and the second liquid pipe rotate relatively, so that the inlet and outlet of the heat exchange tube are converted.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange devices, and in particular to an environmentally friendly and energy-saving heat exchange device for a heating, ventilation and air conditioning system. Background Art

[0002] A heat exchanger is a device that transfers part of the heat of a hot fluid to a cold fluid. It is also called a heat exchanger. Heat exchangers play an important role in chemical, petroleum, power, food and many other industrial productions. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are widely used.

[0003] At present, water in the heat exchange tubes of a heat exchanger is prone to scale after heat exchange. Long-term use of the heat exchange tubes will cause the thickness of the scale to become larger and larger, resulting in reduced heat exchange efficiency and decreased energy utilization, which not only affects the normal operation of the system, but also causes energy waste. Cleaning the scale inside the heat exchange tubes is a time-consuming and laborious problem. Therefore, the present invention provides an environmentally friendly and energy-saving heat exchange device for HVAC to solve the above problems. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an environmentally friendly and energy-saving heat exchange device for HVAC to solve the problem that the thickness of scale on the above-mentioned heat exchange tubes will become increasingly larger after long-term use, resulting in reduced heat exchange efficiency and decreased energy utilization.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] An environmentally friendly and energy-saving heat exchange device for a heating, ventilation and air conditioning system comprises a heat exchange tube and a plurality of heat sinks, wherein the heat exchange tube is arranged in a serpentine shape on the plurality of heat sinks, a cleaning unit for descaling the inner wall of the heat exchange tube is slidably arranged inside the heat exchange tube, the cleaning unit comprises a ring body, the circumferential sliding of the ring body is matched with a sleeve ring, the sleeve ring is in contact with the inner wall of the heat exchange tube, a plurality of paddle plates in an annular array are arranged on both sides of the ring body, a brush is fixedly connected to one end of the paddle plate facing the inner wall of the heat exchange tube, a paddle plate installed on the ring body is arranged at one end of the paddle plate facing the inner diameter of the ring body, the paddle plate rotates under the action of water inside the heat exchange tube, and causes the paddle plate to swing, thereby causing the brush to process the scale on the inner wall of the heat exchange tube;

[0007] Connecting elbows are installed at both ends of the heat exchange tube, and one end of the connecting elbow away from the heat exchange tube is fixedly connected to a three-way tube, and a conversion box is fixedly connected between the two three-way tubes. Two connecting tubes are fixedly connected to the conversion box, and the two connecting tubes are rotatably connected to a first liquid tube and a second liquid tube, respectively. The first liquid tube and the second liquid tube are connected to the two three-way tubes respectively, and the first liquid tube and the second liquid tube are relatively rotated by a driving unit to convert the inlet and outlet positions of the two ends of the heat exchange tube, so that the cleaning unit moves back and forth in the heat exchange tube.

[0008] Preferably, a plurality of first mounting grooves are provided on both sides of the ring body, a mounting shaft and a rotating shaft are respectively provided inside the first mounting grooves, the paddle plate is rotatably mounted on the mounting shaft, the paddle plate and the mounting shaft are fixedly connected with a torsion spring, the paddle plate has multiple paddle pieces and are fixed on the rotating shaft in a ring array, a notch is formed between two adjacent paddle pieces, and one end of the paddle plate is located in the notch.

[0009] Preferably, a transmission unit is provided between the ring body and the sleeve ring to realize the self-rotation of the ring body, the transmission unit is arranged on the ring body, the transmission unit comprises a rotating rod and a second bevel gear, one end of the rotating rod is fixedly connected with the first bevel gear, the second bevel gear is meshed with the first bevel gear, the other end of the rotating rod is fixedly connected with a transmission wheel, and the transmission wheel contacts the inner wall of the sleeve ring.

[0010] Preferably, a receiving groove and a second mounting groove are respectively provided on the ring body, the rotating rod is located between the receiving groove and the second mounting groove, the first bevel gear is located in the second mounting groove, the second bevel gear is located in the second mounting groove, one end of the rotating shaft passes through the ring body and extends into the second mounting groove and is fixedly connected to the second bevel gear, and the transmission wheel is located in the receiving groove.

[0011] Preferably, a sliding groove is formed on the inner wall of the collar, the sliding groove is a tooth groove, the transmission wheel is a gear, the transmission wheel protrudes from the accommodating groove and meshes with the sliding groove.

[0012] Preferably, the conversion box has a rotating chamber, the first liquid tube and the second liquid tube are located in the rotating chamber and are spaced apart, a group of through holes are opened at both ends of the conversion box, each group of through holes has two through holes, the two through holes are respectively connected to the two ports of the three-way pipe, and the first liquid tube and the second liquid tube are used in conjunction with the two corresponding through holes in the two groups.

[0013] Preferably, the first liquid-passing tube includes a first rotating tube, an arc-shaped tube and a first elastic telescopic tube, the first rotating tube is rotatably fitted on one of the connecting tubes, a groove is formed on the arc-shaped tube, and the first elastic telescopic tube corresponds to the through hole, and the second liquid-passing tube includes a second rotating tube and a second elastic telescopic tube, the second rotating tube is rotatably fitted on the other connecting tube, and the second elastic telescopic tube corresponds to the through hole.

[0014] Preferably, the conversion box has a third mounting groove, and the third mounting groove is located on one side of the rotating chamber. The driving unit includes a driving gear, a transmission gear and two gear rings, and the driving gear and the transmission gear are both installed in the third mounting groove and meshed for transmission. The two gear rings are respectively connected to the first liquid passage pipe and the second liquid passage pipe, and the driving gear and the transmission gear are respectively meshed for transmission with the two gear rings. A driver fixed on the conversion box is provided between the two connecting pipes, and the output end of the driver is connected to the driving gear.

[0015] Preferably, a baffle is hingedly connected to the inner cavity of the three-way pipe, the three-way pipe has a first port, a second port and a third port, and the baffle is located between the second port and the third port.

[0016] Preferably, the brush is a wire spring brush.

[0017] The beneficial effects of the present invention are:

[0018] 1. The flow of water inside the heat exchange tube drives the toggle plate to rotate in the middle of the ring body. The toggle plate contacts the toggle plate during the rotation and drives the toggle plate to swing, so that the brush on the toggle plate cleans the scale on the inner wall of the heat exchange tube, avoiding the situation where the heat exchange effect of the heat exchange tube is reduced due to the thickness of the scale on the inner wall of the heat exchange tube. At the same time, the first liquid pipe and the second liquid pipe are relatively rotated by the driving unit, so that the inlet and outlet of the heat exchange tube are switched, so that the cleaning unit can move back and forth in the heat exchange tube.

[0019] 2. The toggle plate rotates to drive the second bevel gear on the rotating shaft to rotate, so that transmission occurs between the second bevel gear and the first bevel gear, and then the transmission wheel drives the ring body to rotate on the sleeve ring, so that the ring body rotates under the action of the water flow inside the heat exchange tube, so that the brush rotates along the inner wall of the heat exchange tube and cleans the inner wall of the heat exchange tube 360 ​​degrees.

[0020] 3. The first elastic telescopic tube and the second elastic telescopic tube are initially in a contracted state. During the mutual rotation of the first liquid tube and the second liquid tube, the first elastic telescopic tube and the second elastic telescopic tube slowly extend and correspond to the through hole again. After the first liquid tube and the second liquid tube rotate relative to each other, the second elastic telescopic tube is located in the groove of the arc tube to avoid mutual interference between the first liquid tube and the second liquid tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the heat exchange device of the present invention.

[0022] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the heat exchange tube of the present invention.

[0023] Figure 3 It is a schematic structural diagram of the cleaning unit of the present invention.

[0024] Figure 4 It is a schematic structural diagram of the ring body of the present invention.

[0025] Figure 5 It is a schematic diagram of the partial cross-sectional structure of the ring body of the present invention.

[0026] Figure 6 It is a schematic diagram of the side view of the partial cross-section structure of the ring body of the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the containing tank of the present invention.

[0028] Figure 8 It is a structural schematic diagram of the transmission unit of the present invention.

[0029] Fig. 9 This is a schematic structural diagram of the conversion box of the present invention from a first viewing angle.

[0030] Fig.10 This is a schematic structural diagram of the conversion box from a second viewing angle of the present invention.

[0031] Fig.11 It is a schematic structural diagram of the driving unit of the present invention.

[0032] Fig.12 It is a schematic diagram of the cross-sectional structure of the three-way pipe of the present invention.

[0033] In the figure: 1, heat exchange tube; 2, heat sink; 3, connecting elbow; 4, three-way pipe; 41, baffle; 5, conversion box; 501, connecting pipe; 51, first liquid pipe; 52, second liquid pipe; 53, through hole; 54, rotating chamber; 56, third mounting groove; 561, driver; 562, driving gear; 563, gear ring; 564, transmission gear; 511, first rotating tube; 512, arc tube; 513, first elastic telescopic tube; 521, second rotating tube; 522, second elastic telescopic tube; 6, cleaning unit; 61, ring body; 62, sleeve ring; 63, paddle plate; 64, paddle plate; 65, first mounting groove; 621, sliding groove; 631, mounting shaft; 632, brush; 641, rotating shaft; 642, second bevel gear; 611, accommodating groove; 612, rotating rod; 613, first bevel gear; 614, transmission wheel; 615, second mounting groove; 401, first opening; 402, second opening; 403, third opening. DETAILED DESCRIPTION

[0034] The following will refer to the attached Figures 1 to 12 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0035] An environmentally friendly and energy-saving heat exchange device for HVAC, such as Figures 1 to 12 As shown, it includes a heat exchange tube 1 and a plurality of heat sinks 2. The heat exchange tube 1 is arranged in a serpentine shape on the plurality of heat sinks 2. A cleaning unit 6 for descaling the inner wall of the heat exchange tube 1 is slidably provided inside the heat exchange tube 1. The cleaning unit 6 includes a ring body 61. The circumferential sliding of the ring body 61 is matched with a collar 62. The outer side of the collar 62 is in an arc shape, so that the collar 62 is in line contact with the inner wall of the heat exchange tube 1, so that the collar 62 can flow quickly in the heat exchange tube 1. The collar 62 and the collar 62 can be made of corrosion-resistant materials to increase the service life of the collar 62 and the collar 62. The collar 62 contacts the inner wall of the heat exchange tube 1. Both sides of the ring body 61 are provided with an annular array There are multiple paddles 63, and one end of the paddle plate 63 facing the inner wall of the heat exchange tube 1 is fixedly connected with a brush 632, and the brush 632 contacts the inner wall of the heat exchange tube 1. The brush 632 is a wire spring brush, which can increase the strength of the brush 632 and improve the cleaning power of the brush 632 on scale. At the same time, the brush 632 can have a certain deformation ability to prevent the brush 632 from becoming shorter after deformation. The end of the paddle plate 63 facing the inner diameter of the ring body 61 is provided with a paddle piece 64 installed on the ring body 61. The paddle piece 64 rotates under the action of water inside the heat exchange tube 1, and causes the paddle plate 63 to swing, so that the brush 632 processes the scale on the inner wall of the heat exchange tube 1.

[0036] Connecting elbows 3 are installed at both ends of the heat exchange tube 1. The diameter of the connecting elbow 3 is smaller than that of the heat exchange tube 1 to prevent the ring body 61 from flowing into the connecting elbow 3. The end of the connecting elbow 3 away from the heat exchange tube 1 is fixedly connected to a tee 4. In detail, the inner cavity of the tee 4 is hinged with a baffle 41. The tee 4 has a first port 401, a second port 402 and a third port 403. The baffle 41 is located between the second port 402 and the third port 403. The baffle 41 can make the first port 401 unidirectionally connected with the second port 402 and the third port 403 respectively to prevent water in the heat exchange tube 1 from flowing into the conversion box 5. A conversion box 5 is fixedly connected between the two three-way pipes 4, and two connecting pipes 501 are fixedly connected to the conversion box 5, one of the connecting pipes 501 is a water inlet pipe, and the other connecting pipe 501 is a water outlet pipe. The two connecting pipes 501 are rotatably connected with a first liquid pipe 51 and a second liquid pipe 52, respectively. The first liquid pipe 51 and the second liquid pipe 52 are respectively connected to the two three-way pipes 4. The first liquid pipe 51 and the second liquid pipe 52 are relatively rotated by a driving unit to convert the inlet and outlet positions of both ends of the heat exchange tube 1, so that the cleaning unit 6 moves back and forth in the heat exchange tube 1.

[0037] Specifically, the flow of water inside the heat exchange tube 1 drives the paddle plate 64 to rotate in the middle part of the ring body 61. The paddle plate 64 contacts the paddle plate 63 during the rotation and drives the paddle plate 63 to swing, so that the brush 632 on the paddle plate 63 cleans the scale on the inner wall of the heat exchange tube 1, thereby avoiding the situation where the heat exchange effect of the heat exchange tube 1 is reduced due to the increasing thickness of the scale on the inner wall of the heat exchange tube 1. At the same time, the first liquid pipe 51 and the second liquid pipe 52 are relatively rotated by the driving unit, so that the inlet and outlet of the heat exchange tube 1 are switched, so that the cleaning unit 6 can move back and forth in the heat exchange tube 1.

[0038] like Figures 3 to 5 As shown, a plurality of first mounting grooves 65 are provided on both sides of the ring body 61, and a mounting shaft 631 and a rotating shaft 641 are respectively provided inside the first mounting grooves 65. The paddle plate 63 is rotatably mounted on the mounting shaft 631, and a torsion spring is fixedly connected to the paddle plate 63 and the mounting shaft 631. The torsion spring is provided so that the paddle plate 63 can be reset after rotation to achieve the swinging effect of the paddle plate 63. The paddle plate 64 has a plurality of paddle pieces 64 fixed on the rotating shaft 641 in an annular array, and a notch is formed between two adjacent paddle pieces 64, and one end of the paddle plate 63 is located in the notch.

[0039] like Figures 6 to 8As shown, a transmission unit is provided between the ring body 61 and the sleeve ring 62 to realize the self-rotation of the ring body 61. The transmission unit is arranged on the ring body 61. In detail, the transmission unit has multiple groups, and the multiple groups of transmission units are respectively used in conjunction with the paddle pieces 64 on both sides of the ring body 61. The two adjacent transmission units are staggered. The transmission unit includes a rotating rod 612 and a second bevel gear 642. One end of the rotating rod 612 is fixedly connected to the first bevel gear 613, and the second bevel gear 642 is meshed with the first bevel gear 613. The other end of the rotating rod 612 is fixedly connected to a transmission wheel 614, and the transmission wheel 614 contacts the inner wall of the sleeve ring 62.

[0040] The ring body 61 is respectively provided with a receiving groove 611 and a second mounting groove 615, the rotating rod 612 is located between the receiving groove 611 and the second mounting groove 615, the first bevel gear 613 is located in the second mounting groove 615, the second bevel gear 642 is located in the second mounting groove 615, one end of the rotating shaft 641 passes through the ring body 61 and extends into the second mounting groove 615, and is fixedly connected to the second bevel gear 642, and the transmission wheel 614 is located in the receiving groove 611.

[0041] Specifically, the rotation of the paddle plate 64 drives the second bevel gear 642 on the rotating shaft 641 to rotate, so that transmission occurs between the second bevel gear 642 and the first bevel gear 613, and then the transmission wheel 614 drives the ring body 61 to rotate on the sleeve ring 62, so that the ring body 61 rotates under the action of the water flow inside the heat exchange tube 1, so that the brush 632 rotates along the inner wall of the heat exchange tube 1, and cleans the inner wall of the heat exchange tube 1 360 degrees.

[0042] like Figure 5 and Figure 6 As shown, a sliding groove 621 is provided on the inner wall of the collar 62, the sliding groove 621 is a tooth groove, the transmission wheel 614 is a gear, the transmission wheel 614 protrudes from the accommodating groove 611 and meshes with the sliding groove 621, which can make the transmission between the transmission wheel 614 and the collar 62 more stable and avoid slipping between the collar 62 and the transmission wheel 614.

[0043] like Fig. 9 and Fig.10 As shown, the conversion box 5 has a rotating chamber 54, the first liquid tube 51 and the second liquid tube 52 are located in the rotating chamber 54 and are arranged at intervals, and a group of through holes 53 are opened at both ends of the conversion box 5, each group of through holes 53 has two, and the two through holes 53 are respectively connected to the second port 402 and the third port 403 in the three-way pipe 4, and the first liquid tube 51 and the second liquid tube 52 are used in conjunction with the two corresponding groups of through holes 53.

[0044] The first liquid-passing tube 51 includes a first rotating tube 511, an arc tube 512 and a first elastic telescopic tube 513. The first rotating tube 511 is rotatably fitted on one of the connecting tubes 501. A groove is formed on the arc tube 512. The first elastic telescopic tube 513 corresponds to the through hole 53. The second liquid-passing tube 52 includes a second rotating tube 521 and a second elastic telescopic tube 522. The second rotating tube 521 is rotatably fitted on the other connecting tube 501. The second elastic telescopic tube 522 corresponds to the through hole 53. In detail, the outlet ends of the two elastic telescopic tubes are arranged in arcs. The inner end of the through hole 53 has an arc groove corresponding to the outlet end of the elastic telescopic tube, so that the elastic telescopic tube can be stopped in the through hole 53 to ensure the sealing between the through hole 53 and the elastic telescopic tube.

[0045] Specifically, the first elastic telescopic tube 513 and the second elastic telescopic tube 522 are initially in a contracted state. During the mutual rotation of the first liquid tube 51 and the second liquid tube 52, the first elastic telescopic tube 513 and the second elastic telescopic tube 522 slowly extend and correspond to the through hole 53 again. After the first liquid tube 51 and the second liquid tube 52 rotate relative to each other, the second elastic telescopic tube 522 is located in the groove of the arc tube 512, so as to avoid mutual interference between the first liquid tube 51 and the second liquid tube 52.

[0046] In another embodiment, a rubber strip is disposed between two opposite through holes 53 , and the rubber strip corresponds to the elastic telescopic tube. During the rotation of the elastic telescopic tube, the rubber strip blocks the outlet end of the elastic telescopic tube to prevent liquid from flowing out.

[0047] like Fig.11 As shown, the conversion box 5 has a third mounting groove 56, which is located on one side of the rotating chamber 54. The driving unit includes a driving gear 562, a transmission gear 564 and two gear rings 563. The driving gear 562 and the transmission gear 564 are both installed in the third mounting groove 56 and meshed for transmission. The two gear rings 563 are respectively connected to the first liquid pipe 51 and the second liquid pipe 52. The driving gear 562 and the transmission gear 564 are respectively meshed for transmission with the two gear rings 563. A driver 561 fixed on the conversion box 5 is provided between the two connecting pipes 501, and the output end of the driver 561 is connected to the driving gear 562. The cooperation between the driving gear 562, the transmission gear 564 and the two gear rings 563 can realize the relative rotation between the driving first liquid pipe 51 and the second liquid pipe 52, and realize the in-and-out conversion of the two ports on the heat exchange tube 1.

[0048] Working principle of the present invention:

[0049] When cleaning the scale on the inner wall of the heat exchange tube 1, the water flowing in the heat exchange tube 1 passes through the middle of the ring body 61, driving the paddle plate 64 to rotate. The paddle plate 64 contacts the paddle plate 63 when rotating, and drives the paddle plate 63 to swing, so that the brush 632 on the paddle plate 63 contacts the scale on the inner wall of the heat exchange tube 1 and cleans it. At the same time, the ring body 61 moves in the heat exchange tube 1 under the push of the water flow.

[0050] At this time, the paddle plate 64 drives the second bevel gear 642 on the rotating shaft 641 to rotate, and the second bevel gear 642 drives the transmission wheel 614 on the rotating rod 612 to rotate through the first bevel gear 613. The transmission wheel 614 contacts the collar 62 and drives the ring body 61 to rotate as a whole, so that the brush 632 on the paddle plate 63 rotates with the ring body 61, thereby cleaning the scale on the inner wall of the heat exchange tube 1 at 360 degrees;

[0051] When the cleaning unit 6 moves to one end of the heat exchange tube 1, the cleaning unit 6 stops moving due to the unidirectional flow of water, and is started by the driver 561. The driver 561 drives the transmission gear 564 to rotate through the active gear 562. At the same time, the active gear 562 and the transmission gear 564 respectively drive the two gear rings 563 to rotate, thereby driving the first liquid tube 51 and the second liquid tube 52 to rotate relative to each other, so that the second elastic telescopic tube 522 in the second liquid tube 52 is located in the groove of the arc tube 512 in the first liquid tube 51. At this time, the first elastic telescopic tube 513 and the second elastic telescopic tube 522 are reset and extended to correspond to the through hole 53 again, thereby converting the inlet and outlet at both ends of the heat exchange tube 1, causing the direction of the water flow to be reversed, so that the cleaning unit 6 moves toward the other end of the heat exchange tube 1 again under the action of the water flow, so that the cleaning unit 6 moves back and forth in the heat exchange tube 1, avoiding the situation where the cleaning unit 6 cannot move after being moved to one end of the heat exchange tube 1.

[0052] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0053] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. An environmentally friendly and energy-saving heat exchange device for a heating, ventilation and air conditioning system, comprising a heat exchange tube (1) and a plurality of heat sinks (2), wherein the heat exchange tube (1) is arranged in a serpentine shape on the plurality of heat sinks (2), characterized in that: A cleaning unit (6) for removing scale from the inner wall of the heat exchange tube (1) is slidably disposed inside the heat exchange tube (1), the cleaning unit (6) comprising a ring body (61), the ring body (61) being slidably fitted with a sleeve ring (62) in the circumferential direction, the sleeve ring (62) being in contact with the inner wall of the heat exchange tube (1), a plurality of paddles (63) in an annular array being disposed on both sides of the ring body (61), a brush (632) being fixedly connected to one end of the paddle plate (63) facing the inner wall of the heat exchange tube (1), a paddle plate (64) mounted on the ring body (61) being disposed at one end of the paddle plate (63) facing the inner diameter of the ring body (61), the paddle plate (64) being rotated under the action of water inside the heat exchange tube (1), and causing the paddle plate (63) to swing, thereby causing the brush (632) to treat scale on the inner wall of the heat exchange tube (1); Both ends of the heat exchange tube (1) are provided with connecting elbows (3); one end of the connecting elbow (3) away from the heat exchange tube (1) is fixedly connected to a three-way tube (4); a conversion box (5) is fixedly connected between the two three-way tubes (4); two connecting tubes (501) are fixedly connected to the conversion box (5); the two connecting tubes (501) are rotatably connected to a first liquid passage tube (51) and a second liquid passage tube (52); the first liquid passage tube (51) and the second liquid passage tube (52) are respectively connected to the two three-way tubes (4); the first liquid passage tube (51) and the second liquid passage tube (52) are relatively rotated by a driving unit to convert the inlet and outlet positions of the two ends of the heat exchange tube (1), so that the cleaning unit (6) moves back and forth in the heat exchange tube (1).

2. The environmentally friendly and energy-saving heat exchange device for HVAC according to claim 1, characterized in that: A plurality of first mounting grooves (65) are provided on both sides of the ring body (61), and mounting shafts (631) and rotating shafts (641) are respectively provided inside the first mounting grooves (65). The paddle plate (63) is rotatably mounted on the mounting shaft (631), and a torsion spring is fixedly connected between the paddle plate (63) and the mounting shaft (631). The paddle plate (64) has a plurality of paddles (64) fixed on the rotating shaft (641) in an annular array, and a notch is formed between two adjacent paddle plates (64), and one end of the paddle plate (63) is located in the notch.

3. The environmentally friendly and energy-saving heat exchange device for HVAC according to claim 2, characterized in that: A transmission unit is provided between the ring body (61) and the sleeve ring (62) to realize the self-rotation of the ring body (61); the transmission unit is arranged on the ring body (61), and comprises a rotating rod (612) and a second bevel gear (642); one end of the rotating rod (612) is fixedly connected to the first bevel gear (613); the second bevel gear (642) is meshed with the first bevel gear (613); the other end of the rotating rod (612) is fixedly connected to a transmission wheel (614); the transmission wheel (614) is in contact with the inner wall of the sleeve ring (62).

4. An environmentally friendly and energy-saving heat exchange device for a heating, ventilation and air conditioning system according to claim 3, wherein a receiving groove (611) and a second mounting groove (615) are respectively provided on the ring body (61), the rotating rod (612) is located between the receiving groove (611) and the second mounting groove (615), the first bevel gear (613) is located in the second mounting groove (615), the second bevel gear (642) is located in the second mounting groove (615), one end of the rotating shaft (641) passes through the ring body (61) and extends into the second mounting groove (615), and is fixedly connected to the second bevel gear (642), and the transmission wheel (614) is located in the receiving groove (611).

5. The environmentally friendly and energy-saving heat exchange device for HVAC according to claim 3, characterized in that: The inner wall of the sleeve ring (62) is provided with a sliding groove (621), the sliding groove (621) is a tooth groove, the transmission wheel (614) is a gear, the transmission wheel (614) protrudes from the accommodating groove (611) and meshes with the sliding groove (621).

6. The environmentally friendly and energy-saving heat exchange device for HVAC according to claim 1, characterized in that: The conversion box (5) has a rotating chamber (54), the first liquid passage tube (51) and the second liquid passage tube (52) are located in the rotating chamber (54) and are arranged at intervals, a group of through holes (53) are opened at both ends of the conversion box (5), each group of through holes (53) has two through holes, the two through holes (53) are respectively connected to the two ports of the three-way pipe (4), and the first liquid passage tube (51) and the second liquid passage tube (52) are respectively used in conjunction with the two corresponding through holes (53) in the two groups.

7. The environmentally friendly and energy-saving heat exchange device for HVAC according to claim 6, characterized in that: The first liquid-passing tube (51) comprises a first rotating tube (511), an arc-shaped tube (512) and a first elastic telescopic tube (513); the first rotating tube (511) is rotatably engaged with one of the connecting tubes (501); a groove is formed on the arc-shaped tube (512); the first elastic telescopic tube (513) is correspondingly engaged with the through hole (53); the second liquid-passing tube (52) comprises a second rotating tube (521) and a second elastic telescopic tube (522); the second rotating tube (521) is rotatably engaged with the other connecting tube (501); and the second elastic telescopic tube (522) is correspondingly engaged with the through hole (53).

8. The environmentally friendly and energy-saving heat exchange device for HVAC according to claim 6, characterized in that: The conversion box (5) has a third mounting groove (56), the third mounting groove (56) being located at one side of the rotating chamber (54); the driving unit comprises a driving gear (562), a transmission gear (564) and two gear rings (563); the driving gear (562) and the transmission gear (564) are both mounted in the third mounting groove (56) and mesh with each other for transmission; the two gear rings (563) are respectively connected to the first liquid passage pipe (51) and the second liquid passage pipe (52); the driving gear (562) and the transmission gear (564) are respectively meshed with the two gear rings (563) for transmission; a driver (561) fixed to the conversion box (5) is provided between the two connecting pipes (501); the output end of the driver (561) is connected to the driving gear (562).

9. The environmentally friendly and energy-saving heat exchange device for HVAC according to claim 1, characterized in that: The inner cavity of the three-way pipe (4) is hinged with a baffle (41); the three-way pipe (4) has a first port (401), a second port (402) and a third port (403); the baffle (41) is located between the second port (402) and the third port (403).

10. The environmentally friendly and energy-saving heat exchange device for HVAC according to claim 1, characterized in that: The brush (632) is a wire spring brush.

Images