Heat exchangers and gas water heaters

Abstract

The present invention provides a heat exchanger and a gas water heater. The heat exchanger includes a box, a heat exchange tube, a coil and a jacket. At least a portion of the heat exchange tube is arranged in the box, the coil is coiled on the outer wall of the box, and the coil is connected to the heat exchange tube; at least a portion of the jacket is located below at least a portion of the coil, and there is a preset gap between the jacket and the coil. The jacket has a drainage port, and the jacket is used to receive condensed water dripping from the coil and discharge the condensed water from the drainage port. With this solution, since a jacket is arranged below the coil, when condensed water drips on the coil, the jacket can receive the condensed water dripping from the coil and concentrate the condensed water to the drainage port, so that the condensed water can be discharged to a preset area through the drainage port, thereby avoiding the problem of condensed water dripping everywhere, thereby ensuring the normal use of the gas water heater and the safety of the user. Moreover, through the structural setting of the coil, the flow of water and the turbulent mixing are increased, and the heat absorption and heat exchange efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas water heaters, and in particular to a heat exchanger and a gas water heater. Background Art

[0002] When the heat exchanger of an existing gas water heater is used in a high humidity and heat environment, condensation droplets are easily generated on the outside of the coil wall. After a large number of droplets gather, they will drip everywhere. The condensation water may drip onto electrical components and exposed wire terminals, which can easily cause safety hazards such as false alarms, affecting normal use and personal safety. Summary of the invention

[0003] The present invention provides a heat exchanger and a gas water heater to solve the problem of condensed water generated by the heat exchanger in the prior art dripping everywhere.

[0004] In order to solve the above-mentioned problem, according to one aspect of the present invention, a heat exchanger is provided, comprising a box body, a heat exchange tube, a coil and a jacket, wherein at least a portion of the heat exchange tube is arranged in the box body, the coil is coiled on the outer wall of the box body, and the coil is connected with the heat exchange tube; at least a portion of the jacket is located below at least a portion of the coil, a preset gap is provided between the jacket and the coil, and the jacket has a drainage port, the jacket is used to receive condensed water dripping from the coil and discharge the condensed water from the drainage port.

[0005] Furthermore, the sheath is disposed on the coil, and the sheath covers at least a portion of the coil.

[0006] Furthermore, the protective sleeve includes a sleeve and a drain pipe arranged at the lower part of the sleeve, the sleeve covers at least a part of the coil, the drain pipe is connected with the cavity in the sleeve, and the drainage port is located on the drain pipe.

[0007] Furthermore, a notch is provided on the side wall of the sleeve, and the notch penetrates the side wall of the sleeve along the extension direction of the sleeve, and the sleeve can undergo elastic deformation to expand the notch; when the notch is expanded, the coil can pass through the notch, so that the sleeve can be put on the coil or removed from the coil.

[0008] Furthermore, the sheath also includes: a first bending piece, which is arranged on the edge of one side of the notch, the first bending piece is located on the side of the notch away from the box body, and there is a gap between the first bending piece and the outer wall of the sleeve; a second bending piece, which is arranged on the edge of the other side of the notch, the second bending piece is located on the side of the notch away from the box body, and there is a gap between the second bending piece and the outer wall of the sleeve.

[0009] Furthermore, the sheath further comprises: a spacing structure, wherein the spacing structure is arranged on the inner wall of the sleeve, and at least a portion of the spacing structure abuts against the outer wall of the coil, so that the sleeve and the coil are spaced apart by the preset gap.

[0010] Furthermore, the spacing structure includes: an arc-shaped spacer, which is arranged at the end of the inner wall of the casing, the arc-shaped spacer extends along the circumference of the casing, and the arc-shaped spacer abuts against the outer wall of the coil; a plurality of block spacers, the plurality of block spacers are distributed on the inner wall of the casing, and at least a portion of the plurality of block spacers abuts against the outer wall of the coil.

[0011] Furthermore, the drain pipe is arranged to be inclined relative to the vertical direction.

[0012] Furthermore, the coil comprises a plurality of coiled sections connected in sequence, and each coiled section is coiled on the box body; there are a plurality of sheaths, and at least one sheath is provided on each coiled section.

[0013] Furthermore, a portion of the coil located on at least one side of the box body is a curved structure.

[0014] Furthermore, the curved structure includes a convex section convex upward and a concave section concave downward, and the convex section and the concave section are connected.

[0015] Furthermore, the curved structure includes at least two recessed sections, and both ends of the raised section are each connected to one recessed section; the shape of the sheath matches the curved structure, and the sheath has at least two drainage ports, and at least two drainage ports are arranged in a one-to-one correspondence with at least two recessed sections.

[0016] According to another aspect of the present invention, a gas water heater is provided, comprising the above-mentioned heat exchanger.

[0017] The technical solution of the present invention is applied to provide a heat exchanger, which includes a box, a heat exchange tube, a coil and a jacket, wherein at least a portion of the heat exchange tube is arranged in the box, the coil is coiled on the outer wall of the box, and the coil is connected to the heat exchange tube; at least a portion of the jacket is located below at least a portion of the coil, and there is a preset gap between the jacket and the coil, and the jacket has a drainage port, and the jacket is used to receive condensed water dripping from the coil and discharge the condensed water from the drainage port. With this solution, since a jacket is arranged below the coil, when condensed water drips on the coil, the jacket can receive the condensed water dripping from the coil and concentrate the condensed water to the drainage port, so that the condensed water can be discharged to a preset area through the drainage port, thereby avoiding the problem of condensed water dripping everywhere, thereby ensuring the normal use of the gas water heater and the safety of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of a heat exchanger provided by an embodiment of the present invention is shown;

[0020] Figure 2 Shows Figure 1 A partial cross-sectional view of a heat exchanger in FIG.

[0021] Figure 3 Shows Figure 1 A schematic diagram of the structure of the sheath;

[0022] Figure 4 Shows Figure 3 A partial enlarged view of the sheath in FIG.

[0023] The above drawings include the following reference numerals:

[0024] 11. Box body; 12. Heat exchange tube; 13. Coil; 14. Water inlet pipe; 15. Water outlet pipe; 16. Fin; 17. Coil section; 20. Sheath; 21. Casing; 22. Drain pipe; 23. First bending part; 24. Second bending part; 25. Arc spacer; 26. Block spacer. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] As shown in the accompanying drawings, an embodiment of the present invention provides a heat exchanger, including a box body 11, a heat exchange tube 12, a coil 13 and a jacket 20, wherein at least a portion of the heat exchange tube 12 is arranged in the box body 11, the coil 13 is coiled on the outer wall of the box body 11, and the coil 13 is connected to the heat exchange tube 12; at least a portion of the jacket 20 is located below the coil 13, and there is a preset gap between the jacket 20 and the coil 13, and the jacket 20 has a drainage port, and the jacket 20 is used to receive condensed water dripping from the coil 13 and discharge the condensed water from the drainage port.

[0027] The technical solution of this embodiment is applied to provide a heat exchanger, which includes a box 11, a heat exchange tube 12, a coil 13 and a jacket 20, wherein at least a portion of the heat exchange tube 12 is arranged in the box 11, the coil 13 is coiled on the outer wall of the box 11, and the coil 13 is connected with the heat exchange tube 12; at least a portion of the jacket 20 is located below at least a portion of the coil 13, and there is a preset gap between the jacket 20 and the coil 13, and the jacket 20 has a drainage port, and the jacket 20 is used to receive condensed water dripping from the coil 13 and discharge the condensed water from the drainage port. With this solution, since the jacket 20 is arranged below the position where the coil 13 is prone to generate condensed water, when condensed water drips on the coil 13, the condensed water dripping from the coil 13 can be received by the jacket 20 and the condensed water is concentrated to the drainage port, so that the condensed water is discharged to a preset area through the drainage port, thereby avoiding the problem of condensed water dripping everywhere, thereby ensuring the normal use of the gas water heater and the safety of users.

[0028] In this embodiment, the sheath 20 is disposed on the coil 13, and the sheath 20 covers at least a portion of the coil 13. Through the above arrangement, the sheath 20 can improve the collection effect of the condensed water dripping on the coil 13, and prevent the condensed water from dripping everywhere. Specifically, the sheath 20 covers the position of the coil 13 where condensed water is easily generated.

[0029] In this embodiment, the sheath 20 includes a sleeve 21 and a drain pipe 22 disposed at the lower part of the sleeve 21. The sleeve 21 covers at least a portion of the coil 13. The drain pipe 22 is connected to the cavity in the sleeve 21, and the drainage port is located on the drain pipe 22. In this way, the condensed water can drip onto the sleeve 21 and be collected centrally through the protective effect of the sleeve 21, and then the condensed water can be discharged to a designated location through the drain pipe 22, so that the condensed water can be prevented from dripping onto the electrical components and the exposed wire terminals, thereby avoiding safety hazards.

[0030] In this embodiment, the side wall of the sleeve 21 has a notch, which penetrates the side wall of the sleeve 21 along the extension direction of the sleeve 21, and the sleeve 21 can be elastically deformed to expand the notch; when the notch is expanded, the coil 13 can pass through the notch, so that the sleeve 21 can be put on the coil 13 or the sleeve 21 can be removed from the coil 13. Through the above arrangement, the assembly of the sheath 20 and the coil 13 can be conveniently realized, thereby improving the production effect.

[0031] Furthermore, the sheath 20 further includes: a first bending piece 23, which is arranged on the edge of one side of the notch, the first bending piece 23 is located on the side of the notch away from the box body 11, and there is a gap between the first bending piece 23 and the outer wall of the sleeve 21; a second bending piece 24, which is arranged on the edge of the other side of the notch, the second bending piece 24 is located on the side of the notch away from the box body 11, and there is a gap between the second bending piece 24 and the outer wall of the sleeve 21. In this way, the notch can be enlarged by pressing the first bending piece 23 and the second bending piece 24, which is convenient and labor-saving to operate and improve production efficiency. In this embodiment, the notch is enlarged by elastic deformation of the sleeve 21 in the radial direction, so that the opening size of the notch is increased and expanded.

[0032] Optionally, there are multiple first bending members 23, and the multiple first bending members 23 are arranged on the sleeve 21 at intervals along the extension direction of the sleeve 21. There are multiple second bending members 24, and the multiple second bending members 24 are arranged on the sleeve 21 at intervals along the extension direction of the sleeve 21. Through the above arrangement, different areas of the sleeve 21 can be conveniently and reliably connected to the coil 13.

[0033] In this embodiment, the sheath 20 further includes: a spacing structure, which is arranged on the inner wall of the sleeve 21, and at least a part of the spacing structure abuts against the outer wall of the coil 13, so that a preset gap is formed between the sleeve 21 and the coil 13. The above arrangement can prevent the sleeve 21 from contacting the coil 13, thereby preventing the sleeve 21 from generating condensed water.

[0034] Specifically, the spacing structure includes: an arc-shaped spacer 25, which is arranged at the end of the inner wall of the casing 21, the arc-shaped spacer 25 extends along the circumference of the casing 21, and the arc-shaped spacer 25 abuts against the outer wall of the coil 13; a plurality of block spacers 26, the plurality of block spacers 26 are distributed on the inner wall of the casing 21, and at least a part of the plurality of block spacers 26 abuts against the outer wall of the coil 13. Through the above arrangement, different positions of the casing 21 can be spaced from the coil 13, thereby improving the spacing effect.

[0035] In this embodiment, the coil 13 includes a plurality of coiled sections 17 connected in sequence, each coiled section 17 is coiled on the housing 11; there are a plurality of sheaths 20, and at least one sheath 20 is provided on each coiled section 17. Through the above arrangement, the flow length of water in the coil 13 can be increased, and the heat exchange effect can be improved. Moreover, the condensed water on each coiled section 17 can be prevented from flowing randomly, thereby improving reliability and safety.

[0036] In this embodiment, the drain pipe 22 is arranged at an angle relative to the vertical direction. Through the above arrangement, the condensed water discharged from the drain pipe 22 can be prevented from falling onto the portion of the coil 13 below the drain pipe 22. Optionally, the drainage port faces away from the housing 11 so that the condensed water can fall into a required safe area.

[0037] Optionally, the sheath 20 is made of metal material, which can achieve fire resistance. The sheath 20 can be set as an integrally formed structure, which has a relatively high strength.

[0038] Optionally, the sheath 20 may also be welded to the coiled pipe 13 .

[0039] like Figure 1 As shown, the portion of the coil 13 located on at least one side of the box 11 is a curved structure. The above arrangement increases the water flow, increases the heat absorption and heat transfer area, increases the heat absorption time, and enhances the turbulence and mixing of the water flow, thereby improving the heat absorption and heat exchange efficiency.

[0040] In this embodiment, the curved structure includes a convex section convex upward and a concave section concave downward, and the convex section and the concave section are connected. Through the above arrangement, the water flow, heat absorption and heat transfer area, and heat absorption time can be further increased, thereby enhancing the turbulent mixing of the water flow and further improving the heat absorption and heat exchange efficiency.

[0041] In this embodiment, the curved structure includes at least two concave sections, and the two ends of the convex section are each connected to a concave section; the shape of the sheath 20 matches the curved structure, and the sheath 20 has at least two drainage ports, which are arranged in a one-to-one correspondence with the at least two concave sections. Since the height of the concave section is relatively low, the drainage port is arranged below the concave section to facilitate the discharge of condensed water. In this way, the heat absorption and heat exchange efficiency can be improved while facilitating the discharge of condensed water.

[0042] Optionally, the heat exchanger further includes a water inlet pipe 14, a water outlet pipe 15 and a plurality of fins 16, the water inlet pipe 14 is connected to the coil 13, the water outlet pipe 15 is connected to the heat exchange tube 12, the plurality of fins 16 are arranged in the box 11, and the heat exchange tube 12 passes through the plurality of fins 16. The above arrangement facilitates water flow and ensures heat exchange effect.

[0043] In this embodiment, the number of ridges and troughs (i.e., raised sections and recessed sections) of the coil 13 can be three or more, and the number of the sheaths 20 can be three or more according to the actual number of layers and length of the coil 13.

[0044] Optionally, the material of the sheath 20 may be copper plate spraying, or stainless steel, aluminum plate, except for non-flame retardant materials;

[0045] Optionally, the sheath 20 may be fixed by a semicircular snap fastener or by welding.

[0046] Optionally, the cross-section of the drainage port may be circular, elliptical, triangular, or an irregular through hole.

[0047] Another embodiment of the present invention provides a gas water heater, which includes the above-mentioned heat exchanger. With this solution, since a sheath 20 is provided below the position where the coil 13 is prone to produce condensed water, when condensed water drips on the coil 13, the sheath 20 can receive the condensed water dripping from the coil 13 and concentrate the condensed water to the drainage port, so that the condensed water can be discharged to a preset area through the drainage port, thereby avoiding the problem of condensed water dripping everywhere, thereby ensuring the normal use of the gas water heater and the safety of the user. Moreover, the portion of the coil 13 located on at least one side of the housing 11 is a curved structure, which increases the flow of water, increases the heat absorption and heat transfer area, increases the heat absorption time, enhances the turbulent mixing of the water flow, and thus improves the heat absorption and heat exchange efficiency.

[0048] Optionally, the gas water heater further comprises a shell and a water receiving cup, the box body 11, the heat exchange tube 12, the coil 13 and the jacket 20 are all arranged in the shell, and the water receiving cup is arranged at the bottom of the shell to collect condensed water flowing down from the jacket. Optionally, a collecting groove is arranged on the bottom wall of the shell, and the cup mouth of the water receiving cup is connected to the bottom wall of the collecting groove, so that the condensed water is conveniently guided to flow into the water receiving cup through the collecting groove.

[0049] The above scheme is adopted to prevent water droplets from dripping everywhere, so that the water droplets are naturally drained from high to low along the wall surface to the drainage port and discharged to the designated position, and then collected and discharged from the bottom plate of the shell. It is ensured that the dripping water droplets will not cause safety hazards to the internal electrical components and exposed wire terminals, while reducing heat dissipation losses and increasing thermal efficiency. This scheme optimizes the structure of the coil 13 of the heat exchanger, improves the heat exchange efficiency of the coil 13, and prolongs the service life. The protection method of the sheath 20 set at the corresponding position of the ups and downs coil 13 of the heat exchanger is optimized, and the drainage water droplets flow from high to low along the wall surface and are discharged from the drainage port, which prevents condensed water from dripping and adhering to electrical components and exposed wire terminals, improves electrical safety performance, reduces the failure rate of false alarms and misjudgments of the machine, and improves the heat absorption and heat exchange efficiency, prolonging the service life.

[0050] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A heat exchanger, characterized in that: It comprises a box body (11), a heat exchange tube (12), a coil (13) and a jacket (20), wherein: At least a portion of the heat exchange tube (12) is disposed in the box (11), the coil (13) is coiled on the outer wall of the box (11), and the coil (13) is in communication with the heat exchange tube (12); At least a portion of the jacket (20) is located below at least a portion of the coil (13), a preset gap is provided between the jacket (20) and the coil (13), and the jacket (20) has a drainage port, the jacket (20) is used to receive condensed water dripping from the coil (13) and discharge the condensed water from the drainage port.

2. The heat exchanger according to claim 1, characterized in that The sheath (20) is disposed on the coil (13), and the sheath (20) covers at least a portion of the coil (13).

3. The heat exchanger according to claim 2, characterized in that The protective sleeve (20) comprises a sleeve (21) and a drainage pipe (22) arranged at the lower part of the sleeve (21), the sleeve (21) covers at least a part of the coil (13), the drainage pipe (22) is connected to the cavity in the sleeve (21), and the drainage port is located on the drainage pipe (22).

4. The heat exchanger according to claim 3, characterized in that The sleeve (21) has a notch on its side wall, the notch penetrating the side wall of the sleeve (21) along the extension direction of the sleeve (21), and the sleeve (21) can undergo elastic deformation to expand the notch; when the notch is expanded, the coil (13) can pass through the notch, so that the sleeve (21) can be put on the coil (13) or the sleeve (21) can be removed from the coil (13).

5. The heat exchanger according to claim 4, characterized in that The sheath (20) further comprises: A first bending piece (23) is arranged on an edge of one side of the notch, the first bending piece (23) is located on a side of the notch away from the box body (11), and there is a gap between the first bending piece (23) and the outer wall of the sleeve (21); The second bending piece (24) is arranged on the edge of the other side of the notch. The second bending piece (24) is located on the side of the notch away from the box body (11). There is a gap between the second bending piece (24) and the outer wall of the sleeve (21).

6. The heat exchanger according to claim 3, characterized in that The sheath (20) further comprises: A spacing structure is provided on the inner wall of the sleeve (21), and at least a portion of the spacing structure abuts against the outer wall of the coil (13) so that the sleeve (21) and the coil (13) are spaced apart by the preset gap.

7. The heat exchanger according to claim 6, characterized in that The spacing structure comprises: an arc-shaped spacer (25) disposed at an end of the inner wall of the sleeve (21), the arc-shaped spacer (25) extending along the circumference of the sleeve (21), and the arc-shaped spacer (25) abutting against the outer wall of the coil (13); A plurality of block spacers (26), wherein the plurality of block spacers (26) are distributed on the inner wall of the sleeve (21), and at least a portion of the plurality of block spacers (26) abut against the outer wall of the coil (13).

8. The heat exchanger according to claim 3, characterized in that The drainage pipe (22) is arranged inclined relative to the vertical direction.

9. The heat exchanger according to claim 1, characterized in that The coil (13) comprises a plurality of coiled sections (17) connected in sequence, and each coiled section (17) is coiled on the box (11); There are a plurality of the sheaths (20), and at least one of the sheaths (20) is disposed on each circle of the coiled section (17).

10. The heat exchanger according to any one of claims 1 to 9, characterized in that The portion of the coil (13) located on at least one side of the box (11) is a curved structure.

11. The heat exchanger according to claim 10, characterized in that The curved structure includes a convex section convex upward and a concave section concave downward, and the convex section and the concave section are connected.

12. The heat exchanger according to claim 11, characterized in that The curved structure comprises at least two recessed sections, and both ends of the raised section are respectively connected to one recessed section; The shape of the sheath (20) matches the curved structure, and the sheath (20) is provided with at least two drainage openings, and the at least two drainage openings are arranged in a one-to-one correspondence with the at least two recessed sections.

13. A gas water heater, characterized in that: The gas water heater comprises the heat exchanger according to any one of claims 1 to 12.

Images