Heat exchanger and water heater with same

Abstract

The utility model discloses a heat exchanger and a water heater with the heat exchanger. The heat exchanger comprises a shell, a heat exchange assembly, a water inlet pipe and a water outlet pipe. The shell is provided with a water inlet and a water outlet, the heat exchange assembly is arranged in the shell, and the heat exchange assembly is communicated with the water inlet and the water outlet. One end of the water inlet pipe is connected with the water inlet, and one end of the water outlet pipe is connected with the water outlet. Wherein the water inlet pipe and / or the water outlet pipe comprises a copper pipe section, a joint section and a stainless steel section, one end of the joint section is connected with the copper pipe section, the other end of the joint section is connected with the stainless steel section through brazing, and the copper pipe section is connected with the water inlet or the water outlet. According to the heat exchanger and the water heater with the heat exchanger, at least one of the water inlet pipe and the water outlet pipe is composed of the stainless steel section, the copper pipe section and the joint section, and production cost is reduced. And good weldability is achieved between the joint section and the copper pipe section, and the connecting difficulty of the stainless steel section and the copper pipe section can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of water heaters, and in particular relates to a heat exchanger and a water heater with the heat exchanger. Background Art

[0002] Water heaters are currently the mainstream solution for urban and rural residents to obtain hot water for domestic use. The heat exchangers in water heaters mostly use copper heat exchange plates and copper inlet and outlet pipe structures. Due to the relatively high price of copper, the cost of water heaters and their pipes remains high. In order to reduce the manufacturing cost of water heaters in the prior art, the thickness or length of copper pipes can be reduced. When the thickness of the pipes is reduced, copper reacts with impurities in the water to form copper rust, which can easily corrode the pipes and cause water leakage. When the length of the pipes is reduced, the heat exchange efficiency of the water flow inside the pipes is often affected. Therefore, how to reasonably reduce production costs while ensuring that the water heater pipeline and heat exchange performance remain unchanged has become a focus of concern in the water heater industry.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to a person skilled in the art. Utility Model Content

[0004] The utility model aims to provide a heat exchanger and a water heater with the heat exchanger, which replaces the original copper pipe fittings by brazing the stainless steel pipe with the copper pipe, thereby reducing the difficulty of connecting the stainless steel pipe and the copper pipe fittings and reducing the production cost.

[0005] In order to achieve the above-mentioned purpose, a specific embodiment of the utility model provides a heat exchanger, including a shell, a heat exchange component, a water inlet pipe and a water outlet pipe. The shell is provided with a water inlet and a water outlet, and the heat exchange component is arranged in the shell, and the heat exchange component is connected with the water inlet and the water outlet. One end of the water inlet pipe is connected to the water inlet, and one end of the water outlet pipe is connected to the water outlet. Among them, the water inlet pipe and / or the water outlet pipe includes a copper pipe section, a joint section and a stainless steel section, one end of the joint section is connected to the copper pipe section, and the other end is brazed and connected to the stainless steel section, and the copper pipe section is connected to the water inlet or the water outlet.

[0006] In one or more embodiments of the present invention, the joining section is made of oxygen-free copper.

[0007] In one or more embodiments of the present invention, the joint section and the copper pipe section are connected by welding.

[0008] In one or more embodiments of the present invention, the stainless steel segment is at least partially coiled around the housing.

[0009] In one or more embodiments of the present invention, the joining section is disposed close to the heat exchange component.

[0010] In one or more embodiments of the present invention, the water inlet pipe and / or the water outlet pipe further includes an external connection section, and the external connection section is brazed to the other end of the stainless steel section.

[0011] In one or more embodiments of the present invention, the external connection section is made of oxygen-free copper.

[0012] In one or more embodiments of the present invention, the stainless steel section is made of 2 series stainless steel, 3 series stainless steel or 4 series stainless steel.

[0013] A specific implementation of the utility model provides a water heater, comprising the above-mentioned heat exchanger.

[0014] Compared with the prior art, the heat exchanger of the utility model and the water heater having the heat exchanger have at least one of the water inlet pipe and the water outlet pipe composed of a stainless steel section, a copper pipe section and a joint section. Since the cost of stainless steel is much lower than that of copper, the production cost can be reduced. In addition, the joint section and the copper pipe section have good weldability, which can reduce the difficulty of connecting the stainless steel section and the copper pipe section, further reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings described below are only some implementations recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a structural diagram of a heat exchanger in one embodiment of the utility model;

[0017] Figure 2 This is a structural diagram of a water inlet pipe and a water outlet pipe in one embodiment of the utility model;

[0018] Figure 3 This is a structural diagram of a heat exchanger in another embodiment of the present invention.

[0019] Explanation of main figure marks: 1. Shell, 2. Water inlet pipe, 3. Water outlet pipe, 4. Coiled part, 5. Copper pipe section, 6. Joint section, 7. Stainless steel section, 8. External section, 9. Heat exchange component. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the implementation of the present invention will be clearly and completely described below in conjunction with the drawings in the implementation of the present invention. Obviously, the described implementation is only a part of the implementation of the present invention, not all of the implementations. Based on the implementation of the present invention, all other implementations obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] like Figures 1 to 3 As shown, the heat exchanger in one embodiment of the utility model includes a shell 1, a heat exchange component 9, a water inlet pipe 2 and a water outlet pipe 3. The shell 1 is provided with a water inlet and a water outlet, the heat exchange component 9 is arranged in the shell 1, the heat exchange component 9 is connected with the water inlet and the water outlet, the heat exchange component 9 includes a heat exchange tube and a heat exchange plate, and the heat exchange tube is passed through the heat exchange plate. One end of the water inlet pipe 2 is connected to the water inlet, and one end of the water outlet pipe 3 is connected to the water outlet. The cold water in the water inlet pipe 2 enters the heat exchange tube from the water inlet to absorb heat and convert into hot water, and the hot water flows into the water outlet pipe 3 through the water outlet. Among them, at least one of the water inlet pipe 2 and the water outlet pipe 3 includes a copper pipe section 5, a joint section 6 and a stainless steel section 7, one end of the joint section 6 is connected to the copper pipe section 5, and the joint section 6 and the copper pipe section 5 have good weldability. The joint section 6 is made of a copper-containing metal material, such as pure copper, brass or other copper alloys. The other end of the joint section 6 is brazed to the stainless steel section 7, the other end of the copper pipe section 5 of the water inlet pipe 2 is connected to the water inlet, and the other end of the copper pipe section 5 of the water outlet pipe 3 is connected to the water outlet.

[0022] In the above embodiment, under the condition that the heat exchanger pipeline and heat exchange performance remain unchanged, that is, without adjusting its heat exchange component 9, at least one of the water inlet pipe 2 and the water outlet pipe 3 is replaced with a composite pipe composed of a stainless steel section 7, a copper pipe section 5 and a joint section 6. Since the cost of stainless steel is much lower than that of copper, the overall production cost of the heat exchanger can be reduced. In addition, considering the poor weldability between stainless steel and copper, a large amount of silver or other high-cost metals are consumed during welding. A joint section 6 is connected to the end of the stainless steel section 7. The joint section 6 with good weldability to the copper pipe section 5 is brazed to the copper pipe section 5, which can reduce the difficulty of connecting the stainless steel section 7 and the copper pipe section 5 and reduce the production cost.

[0023] In one embodiment, the joining section 6 is made of oxygen-free copper, which has good processing performance, welding performance and corrosion resistance, and has good weldability with the copper pipe section 5. Therefore, the joining section 6 and the copper pipe section 5 can be connected together by welding, and bronze or nickel-based solder paste can be used as the welding material during brazing.

[0024] Of course, the material of the joint section 6 is not limited to oxygen-free copper, and other copper-containing materials, such as copper alloys, etc. Alternatively, the joint section 6 may also be made of other materials that have good weldability with the copper tube section 5 .

[0025] The housing 1 is usually provided with a heating source, such as a heating component for burning gas. Figure 1 As shown, in the existing heat exchanger, part of the water inlet pipe 2 and the water outlet pipe 3 are generally coiled on the shell 1 to improve the degree of heating of the water flow in the water inlet pipe 2 and the water outlet pipe 3. Therefore, most of the water inlet pipe 2 and the water outlet pipe 3 are generally coiled on the shell 1, and replacing this part with a stainless steel pipe can reduce the production cost of the heat exchanger to the greatest extent.

[0026] When the coiled portion 4 of the water inlet pipe 2 and the water outlet pipe 3 is entirely replaced with a stainless steel pipe, the coiled portion 4 may constitute a part of the stainless steel section 7 .

[0027] It should be noted that one end of the coiled portion 4 is close to the heat exchange component 9 , and the other end generally extends in a direction away from the shell 1 .

[0028] Furthermore, when the coiled portion 4 is replaced as a whole with a stainless steel tube, the position of the joint section 6 will be relatively close to the heat exchange component 9. Of course, if the coiled portion 4 is not replaced as a whole with a stainless steel tube, but only partially replaced with a stainless steel tube, the position of the joint section 6 should still be relatively close to the heat exchange component 9 to ensure that the stainless steel tube occupies a larger proportion in the coiled portion 4.

[0029] Of course, if Figure 3 As shown, when the water inlet pipe 2 and the water outlet pipe 3 are not coiled on the shell 1 , in order to minimize the production cost, the stainless steel section 7 still needs to occupy most of the area of ​​the water inlet pipe 2 and the water outlet pipe 3 .

[0030] In one embodiment, the water inlet pipe 2 and / or the water outlet pipe 3 further comprises an external connection section 8, which is arranged at one end of the water inlet pipe 2 and / or the water outlet pipe 3 away from the housing 1, that is, the external connection section 8 and the joint section 6 are respectively provided at both ends of the stainless steel section 7, and the external connection section 8 is also connected to the stainless steel section 7 by brazing. The function of the external connection section 8 is to facilitate the connection of the stainless steel section 7 with the external copper pipeline.

[0031] Of course, the external connection section 8 can also be made of oxygen-free copper. Moreover, its material is not limited to oxygen-free copper, and other copper-containing materials, such as copper alloys, etc., can also be selected. Alternatively, other materials with good weldability with the copper tube section 5 can also be selected.

[0032] In one embodiment, the material of the stainless steel section 7 includes, but is not limited to, series 2 stainless steel, series 3 stainless steel, and series 4 stainless steel.

[0033] Another embodiment of the present invention further provides a water heater, which includes the above-mentioned heat exchanger and other essential components required for the water heater.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A heat exchanger, characterized in that: include: A housing (1) provided with a water inlet and a water outlet; A heat exchange component (9) is disposed in the housing (1), and the heat exchange component (9) is in communication with the water inlet and the water outlet; A water inlet pipe (2), one end of which is connected to the water inlet; A water outlet pipe (3), one end of which is connected to the water outlet; The water inlet pipe (2) and / or the water outlet pipe (3) comprises a copper pipe section (5), a joint section (6) and a stainless steel section (7); one end of the joint section (6) is connected to the copper pipe section (5) and the other end is brazed to the stainless steel section (7); and the copper pipe section (5) is connected to the water inlet or the water outlet.

2. The heat exchanger according to claim 1, characterized in that: The joining section (6) is made of oxygen-free copper.

3. The heat exchanger according to claim 1, characterized in that: The joint section (6) is connected to the copper pipe section (5) by welding.

4. The heat exchanger according to claim 1, characterized in that: The stainless steel section (7) is at least partially coiled around the housing (1).

5. The heat exchanger according to claim 1, characterized in that: The joining section (6) is arranged close to the heat exchange component (9).

6. The heat exchanger according to claim 1, characterized in that The water inlet pipe (2) and / or the water outlet pipe (3) further comprises an external connection section (8), and the external connection section (8) is brazed and connected to the other end of the stainless steel section (7).

7. The heat exchanger according to claim 6, characterized in that The external connection section (8) is made of oxygen-free copper.

8. The heat exchanger according to claim 1, characterized in that The stainless steel section (7) is made of 2 series stainless steel, 3 series stainless steel or 4 series stainless steel.

9. A water heater, characterized in that: Comprising the heat exchanger according to any one of claims 1 to 8.

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