An improved condensing heat exchanger

Abstract

An improved condensing heat exchanger comprises an outer casing, a heat exchange pipe assembly and a smoke guide, the outer casing comprises a smoke inlet, a heat exchange cavity, a smoke outlet pipe and a condensate drainage interface arranged on the bottom plate of the heat exchange cavity; the heat exchange pipe assembly is arranged in the heat exchange cavity; the smoke guide comprises a lower opening buffer cavity and a smoke guide plate, the smoke guide plate is provided with a plurality of smoke guide holes; one side wall plate of the buffer cavity is fixed with the wall plate of the heat exchange cavity provided with the smoke inlet, and the smoke guide plate covers the top of one end of the heat exchange pipe assembly and is opposite to the smoke outlet pipe. The smoke guide adopts such structure and position relationship with the heat exchange pipe, so that the smoke and the heat exchange pipe are fully in contact for heat exchange, and the smoke can also be prevented from being directly discharged from the smoke outlet pipe.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, and in particular to a condensing heat exchanger and a gas water heater. Background Technology

[0002] The existing technology, Chinese Patent 202322569493.8, discloses a condensing heat exchanger and a gas water heater, belonging to the field of heat exchanger technology. The condensing heat exchanger includes a shell, a heat exchange tube assembly, and a smoke baffle assembly. A heat exchange chamber is provided inside the shell, and an inlet and an outlet communicating with the heat exchange chamber are provided on the shell. The heat exchange tube assembly is disposed within the heat exchange chamber. The smoke baffle assembly is disposed on the side of the inlet near the outlet, between the inner wall of the shell and the heat exchange tube assembly. The smoke baffle assembly is used to prevent high-temperature flue gas entering from the inlet from directly flowing out from the outlet. The problem is that the smoke baffle assembly prevents some heat exchange tubes from exchanging heat with the flue gas, generating eddies and noise. Utility Model Content

[0003] The purpose of this invention is to provide an improved condensing heat exchanger, which features full contact between the heat exchange tubes and the flue gas.

[0004] This utility model is implemented as follows: an improved condensing heat exchanger includes an outer shell, a heat exchange tube assembly, and a smoke guide. The outer shell includes a smoke inlet, a heat exchange chamber, a smoke exhaust pipe, and a condensate drain outlet on the bottom plate of the heat exchange chamber. The heat exchange tube assembly is located inside the heat exchange chamber. The special feature is that the smoke guide includes a buffer chamber with a lower opening and a smoke guide plate, and the smoke guide plate is provided with a plurality of smoke guide holes.

[0005] One side wall panel of the buffer chamber is fixed to the wall panel of the heat exchange chamber where the smoke inlet is located, and the smoke guide plate covers the top of one end of the heat exchange tube assembly and is opposite to the smoke exhaust pipe.

[0006] The improved condensing heat exchanger is characterized in that the flue gas guide hole is rectangular, circular, or elliptical.

[0007] The improved condensing heat exchanger is characterized in that: the heat exchange tube assembly includes four sub-tube groups, which are arranged in a row and column pattern, and each sub-tube group is composed of several heat exchange tubes arranged in a row and column pattern.

[0008] Includes inlet and outlet covers, inlet interface, outlet interface, and water guide cover.

[0009] The inlet and outlet covers include an inlet chamber with an opening on one side, an outlet chamber with an opening on one side, and a bottom horizontal series chamber;

[0010] The water guide cover has two longitudinally arranged, series-connected cavities;

[0011] The heat exchange chamber walls at both ends of the sub-tube group are fixed and sealed. The water guide cover is fastened and sealed to one wall of the heat exchange chamber. The longitudinal series cavity is fixed to one wall of the heat exchange chamber and connects the longitudinally arranged sub-tube groups in series. The inlet and outlet covers are fastened and sealed to the other wall of the heat exchange chamber. The inlet and outlet chambers are fastened and sealed to the wall panels and are respectively connected to the upper sub-tube groups. The inlet and outlet interfaces are respectively connected to the inlet and outlet chambers. The bottom horizontal series cavity connects the two bottom sub-tube groups in series.

[0012] The improved condensing heat exchanger is characterized in that the inlet and outlet water interfaces correspond to the heat exchange tubes on the upper part of the sub-tube group, respectively.

[0013] This utility model discloses an improved condensing heat exchanger. The flue gas guide element adopts such a structure and such a positional relationship with the heat exchange tube, which allows the flue gas to fully contact and exchange heat with the heat exchange tube, and also prevents the flue gas from being directly discharged from the exhaust pipe. Attached Figure Description

[0014] Figure 1 This is one of the sectional views of this utility model.

[0015] Figure 2 This is a three-dimensional sectional view of the present invention.

[0016] Figure 3 This is the second sectional view of this utility model.

[0017] Figure 4 This is one of the exploded perspective views of this utility model.

[0018] Figure 5 This is the second exploded perspective view of this utility model.

[0019] Figure 6 This is a perspective view of the present invention. Detailed Implementation

[0020] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figure 1 , Figure 2 As shown, an improved condensing heat exchanger includes an outer shell 1, a heat exchange tube assembly 2, and a smoke guide 3. The outer shell 1 includes a smoke inlet 11, a heat exchange chamber 12, a smoke outlet 13, and a condensate drain outlet 13 disposed on the bottom plate of the heat exchange chamber. The heat exchange tube assembly 2 is disposed inside the heat exchange chamber 12.

[0023] The smoke guide 3 includes a buffer cavity 31 with a lower opening and a smoke guide plate 32. The smoke guide plate 32 is provided with a plurality of smoke guide holes 321, which are evenly distributed along the length of the smoke guide plate 32. The smoke guide plate 32 is connected to the lower end of one wall of the buffer cavity 31.

[0024] One side wall panel of the buffer chamber is fixed to the wall panel of the heat exchange chamber 12 with the smoke inlet 11. The smoke guide plate 32 covers the top of one end of the heat exchange tube assembly 2 and is opposite to the smoke exhaust pipe 13. There is a gap between the smoke guide plate 32 and the top plate of the heat exchange chamber 12. The width of the smoke guide plate 32 is smaller than the diameter of the smoke exhaust pipe.

[0025] The buffer chamber 12 acts as a buffer, allowing the flue gas entering the heat exchange chamber 12 from the exhaust port 11 to move in a straight line, eliminating noise and ensuring smooth flue gas flow.

[0026] The smoke guide hole 321 is rectangular, circular, or elliptical.

[0027] As a further improvement of this utility model: the heat exchange tube assembly 2 includes four sub-tube groups 21, which are arranged in a row and column manner, and each sub-tube group 21 is composed of several heat exchange tubes arranged in a row and column manner.

[0028] Includes inlet and outlet covers 4, inlet interface 51, outlet interface 52, and guide cover 6.

[0029] The inlet and outlet cover 4 includes an inlet chamber 41 with an opening on one side, an outlet chamber 42 with an opening on one side, and a bottom horizontal series chamber 43;

[0030] The water guide cover 6 is provided with two longitudinally arranged longitudinally connected cavities 61;

[0031] The two ends of the sub-tube group 21 are fixed and sealed to the wall panels of the heat exchange chamber 12 respectively. The water guide cover 6 is fastened and sealed to one wall panel of the heat exchange chamber 12. The longitudinal series cavity 61 is fixed to one wall panel of the heat exchange chamber 12 and connects the longitudinally arranged sub-tube group 21 in series. The inlet and outlet cover 4 is fastened and sealed to the other wall panel of the heat exchange chamber 12. The inlet cavity 41 and outlet cavity 42 are fastened and sealed to the wall panel and are respectively connected to the upper sub-tube group 21. The inlet port 51 and outlet port 52 are respectively connected to the inlet cavity 41 and the outlet cavity 42. The bottom horizontal series cavity 43 connects the two bottom sub-tube groups 21 in series.

[0032] The inlet water interface 51 and the outlet water interface 52 correspond to the heat exchange tubes on the upper part of the sub-tube group 21, respectively.

[0033] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An improved condensing heat exchanger, comprising a shell, a heat exchange tube assembly, and a flue gas guide, wherein the shell includes a flue gas inlet, a heat exchange chamber, a flue gas exhaust pipe, and a condensate drain outlet disposed on the bottom plate of the heat exchange chamber; the heat exchange tube assembly is disposed within the heat exchange chamber; characterized in that: The smoke guide includes a buffer cavity with a lower opening and a smoke guide plate, and the smoke guide plate is provided with a plurality of smoke guide holes; One side wall panel of the buffer chamber is fixed to the wall panel of the heat exchange chamber where the smoke inlet is located, and the smoke guide plate covers the top of one end of the heat exchange tube assembly and is opposite to the smoke exhaust pipe.

2. An improved condensing heat exchanger according to claim 1, characterized in that: The smoke guide hole is rectangular, circular, or elliptical.

3. An improved condensing heat exchanger according to claim 1, characterized in that: The heat exchange tube assembly includes four sub-tube groups, which are arranged in a row-column pattern. Each sub-tube group is composed of several heat exchange tubes arranged in a row-column pattern. Includes inlet and outlet covers, inlet interface, outlet interface, and water guide cover. The inlet and outlet covers include an inlet chamber with an opening on one side, an outlet chamber with an opening on one side, and a bottom horizontal series chamber; The water guide cover has two longitudinally arranged, series-connected cavities; The heat exchange chamber walls at both ends of the sub-tube group are fixed and sealed. The water guide cover is fastened and sealed to one wall of the heat exchange chamber. The longitudinal series cavity is fixed to one wall of the heat exchange chamber and connects the longitudinally arranged sub-tube groups in series. The inlet and outlet covers are fastened and sealed to the other wall of the heat exchange chamber. The inlet and outlet chambers are fastened and sealed to the wall panels and are respectively connected to the upper sub-tube groups. The inlet and outlet interfaces are respectively connected to the inlet and outlet chambers. The bottom horizontal series cavity connects the two bottom sub-tube groups in series.

4. An improved condensing heat exchanger according to claim 3, characterized in that: The inlet and outlet water interfaces correspond to the heat exchange tubes at the top of the sub-tube group, respectively.

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