Patent Application
20140033994
This application claims priority to Chinese Utility Patent Application No. 201210271497.1, filed Aug. 1, 2012, the contents of which of are incorporated herein by reference.
The present invention relates to a gas water heating device, in particular to a condensing gas water heating device.
At present, the typical heat exchanger of the condensing type gas water heating device in the prior art is two-segmented, which means that the heat exchanger mainly comprises a main heat exchanger and a condensing heat exchanger. Usually, the main heat exchanger is made of copper materials, while the condensing heat exchanger is made of stainless steel. The main heat exchanger and the condensing heat exchanger both consist of a heat exchange portion and a frame fixed on the periphery of the heat exchanger portion. The frames of the main heat exchanger and the condensing heat exchanger are connected together through parts such as flanges, screws, and clips. This connection structure is large in size and uses a plurality of parts and parts and materials vary with corrosion resistance. To prevent the condensed water from corroding some parts and causing leakage of the condensed water or corrosion to the whole heat exchanger assembly, the sealing performance of the connection structure is of great importance. For example, sealing materials resistant to a high temperature are adopted to avoid leakage of the condensed water. Therefore, the structure and processing technology of the existing heat exchanger assembly are relatively complicated.
Furthermore, the main heat exchanger adopted by the gas water heater in the prior art is usually made of copper and the material itself is corroded by the trace water solution of nitric oxide (NOx) which is condensed from the flue gas in the service process, so the performance of the main exchanger unit is greatly reduced, including a decline in thermal efficiency, excessive flue gas emission (primarily, the concentration of the carbon monoxide emission exceeds the standard) and perforation and water leakage of the heat exchanger. This can greatly shorten the service life of the heat exchanger.
To solve the problems in the prior art, the present invention provides a condensing, gas water heating device, which simplifies the structure and processing technology of the heat exchanger assembly of the condensing gas water heating device and meanwhile improves the corrosion resistance and sealing property of the heat exchanger assembly.
The technical aim of the present invention is realized by the following technical solutions.
A condensing gas water heating device comprises a heat exchanger assembly including a frame, a main heat exchanger and a condensing heat exchanger. The frame, main heat exchanger, and condensing heat exchanger are all made of stainless steel and the main heat exchanger and the condensing heat exchanger are integrally welded with the flue of the frame along a flue gas flow path to form the heat exchanger assembly. Additionally, a condensed water collector is arranged between the main heat exchanger and the condensing heat exchanger.
The main heat exchanger and the condensing heat exchanger of the condensing gas water heating device provided by the present invention are both made of stainless steel and are welded to form an integrally structured heat exchanger assembly, thereby avoiding problems such as the complicated structure and processing technology of the heat exchanger assembly caused by adopting the connection structures such as flanges and screws which require a plurality of parts and high sealing performance. What is more, a condensed water collector is arranged between the main heat exchanger and the condensing heat exchanger, preventing the condensed water generated during the working of the condensing heat exchanger from damaging the heat exchanger assembly.
Furthermore, said condensed water collector is welded on the flue wall of the frame.
Furthermore, said main heat exchanger and condensing heat exchanger are both finned tube heat exchangers.
Furthermore, said flue of said frame is integrally formed of a metal material.
Furthermore, said metal material is stainless steel.
Furthermore, said main heat exchanger and condensing heat exchanger are brazed with the flue of the frame to form the heat exchanger assembly.
In a preferable scheme of the condensing gas water heating device provided by the present invention, the main heat exchanger and condensing heat exchanger of the heat exchanger assembly are both finned tube heat exchangers. The frame is made of an integral stainless steel material, which means that the heat exchanger assembly only uses one frame, while the main heat exchanger and the condensing heat exchanger are both arranged in the frame. After being assembled, the main heat exchanger, condensing heat exchanger and frame are brazed and molded into the heat exchanger assembly at one time. The heat exchanger assembly processed by this scheme is simple in structure and processing and small in size and is greatly improved in the aspects of sealing property and corrosion resistance.
Furthermore, the flue gas outlet end of said frame is provided with a flue gas collecting hood which is welded with the frame.
Furthermore, said flue gas collecting hood is made of stainless steel.
The flue gas collecting hood at the flue gas outlet of the heat exchanger assembly is integrally welded with the heat exchanger assembly, which simplifies the structure and process of the condensing, gas water heating device.
All in all, the main heat exchanger, condensing heat exchanger and frame of the condensing gas water heating device provided by the present invention is welded to form an integrally structured heat exchanger assembly which is simple in structure and processing and small in size and has greatly improved sealing property and corrosion resistance. Therefore the service life of the whole condensing, gas water heating device is prolonged, material and processing costs are saved, and remarkable economic benefits are created.
Other aspects of the invention will become apparent by consideration of the detailed description and accompanying drawings.
Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways.
Said main heat exchanger 3 and the condensing heat exchanger 4 are both finned tube heat exchangers. The flue 2 of said frame 1 is integrally formed of a stainless steel material. The main heat exchanger 3 and the condensing heat exchanger 4 are integrally brazed with the flue 2 of the frame 1. Of course, in addition to brazing, the present invention can adopt other welding means well-known by those skilled in this field, such as fuse welding and pressure welding. The integral structure does not have connection points which tend to corrode and leak thus the process of preventing leakage of the condensed water by using the sealing material resistant to high temperature in the heat exchanger in the prior art is avoided. The cost, corrosion resistance and the overall sealing property of the gas water heater are greatly improved.
As shown in
The top of the flue 2 of the frame 1 in the present invention is also provided with a flue gas collecting hood 6. See
In conclusion, in the present invention, the main heat exchanger and the condensing heat exchanger are welded with the frame to form an integral structure, which simplifies the structure and processing technology of the gas water heater and avoids using a sealing material resistant to a high temperature in the gas water heater. What is more, the condensed water collecting plate is welded on the inner wall of the flue, thus effectively controlling the guide process of the condensed water. The condensing gas water heating device provided by the present invention is made of stainless steel materials, which effectively avoids the influences caused by the trace corrosive substances generated during the normal use of the main heat exchanger and therefore greatly improves the service life of the main heat exchanger. Thus, the main heat exchanger and condensing heat exchanger are consistent in the service life grade as the service life and safety of the whole condensing gas water heating device are improved. Additionally, costs in materials, processing and assembling are reduced and remarkable economic benefits are created.
The above embodiment is used for describing the present invention only and does not limit the present invention. Those already skilled in this technical field may make various changes within the spirit and scope of the present invention, therefore all equivalent technical schemes shall belong to the present invention. The patent protective scope of the present invention is limited by the claims.
Thus, the invention provides, among other things, a condensing gas water heater. Various features and advantages of the invention are set forth in the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201210271497.1 | Aug 2012 | CN | national |
