Gas water heater and heat exchanger, heat exchanger shell structure

Abstract

The present invention discloses a gas water heater and its heat exchanger and heat exchanger shell structure; the heat exchanger shell structure comprises: a heat exchanger shell; a water-passing groove is arranged on the heat exchanger shell, and the heat exchanger shell is covered on the combustion chamber of the gas water heater, and a water flow channel for water flow is formed between the water-passing groove and the outer wall of the combustion chamber; the two ends of the water flow channel are respectively connected with the water inlet pipe and the water outlet pipe; the heat exchanger comprises a combustion chamber, a water inlet pipe and a water outlet pipe, and also comprises the above-mentioned heat exchanger shell. The gas water heater and its heat exchanger and heat exchanger shell structure of the present invention can more effectively increase the heat exchange area of ​​water, thereby further improving the heat exchange efficiency.

Description

Technical Field

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

[0002] The heat exchanger of an existing gas water heater is generally achieved by spiraling and welding a metal water pipe to the outer wall of a combustion chamber. When the combustion chamber is working, the heat generated by the combustion chamber is transferred to the metal water pipe through the outer wall of the combustion chamber, and then transferred to the water flowing in the pipe through the metal water pipe, thereby preheating the water and making better use of the heat in the combustion chamber.

[0003] However, since the contact area between the metal water pipe and the outer wall of the combustion chamber is small, the heat exchange efficiency is not high enough. Therefore, it is necessary to develop a heat exchanger with higher heat exchange efficiency. Summary of the invention

[0004] The object of the present invention is to provide a heat exchanger shell structure of a gas water heater, which can more effectively increase the heat exchange area of ​​water, thereby further improving the heat exchange efficiency.

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

[0006] A heat exchanger shell structure of a gas water heater, comprising:

[0007] Heat exchanger housing;

[0008] The heat exchanger shell is provided with a water-passing groove, and the heat exchanger shell is covered on the combustion chamber of the gas water heater, and a water flow channel for water flow to pass through is formed between the water-passing groove and the outer wall of the combustion chamber;

[0009] The two ends of the water flow channel are respectively communicated with the water inlet pipe and the water outlet pipe of the heat exchanger.

[0010] The present invention covers the outer wall of the combustion chamber of the gas water heater with a layer of heat exchanger shell, and a water-passing groove is formed on the heat exchanger shell, and a water flow channel for water to flow through is formed between the water-passing groove and the outer wall of the combustion chamber shell; when the unheated water flows through the water flow channel, the water can directly contact the outer wall of the combustion chamber, thereby directly absorbing in advance the heat conducted from the combustion chamber to the outer wall of the combustion chamber; compared with the prior art, the heat generated by the combustion chamber needs to pass through the outer wall of the combustion chamber and the metal water pipe in turn, and then be conducted to the water in the metal water pipe. The heat exchanger shell structure of the present invention has a larger heat exchange area and a shorter heat conduction distance, thereby greatly improving the heat exchange efficiency.

[0011] Another object of the present invention is to provide a heat exchanger for a gas water heater, which comprises the above-mentioned heat exchanger shell structure.

[0012] Further, the combustion chamber includes a combustion chamber housing;

[0013] An expansion groove corresponding to the water-passing groove is arranged on the outer wall of the combustion chamber shell, and the water flow channel is formed between the expansion groove and the water-passing groove.

[0014] The present invention further arranges an expansion groove on the outer wall of the combustion chamber shell to form the above-mentioned water flow channel between the expansion groove and the water passing groove. While further increasing the amount of water that can flow through the water flow channel, it can also further increase the contact area between the water flowing through the water flow channel and the combustion chamber shell, thereby further improving the heat exchange efficiency of the heat exchanger.

[0015] Another object of the present invention is to provide a gas water heater, which includes the above-mentioned heat exchanger.

[0016] For better understanding and implementation, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of a heat exchanger shell according to Embodiment 1 of the present invention;

[0018] Figure 2 is a schematic diagram of the connection between the heat exchanger shell and the combustion chamber of Example 1 of the present invention;

[0019] Figure 3 is a cross-sectional schematic diagram of the heat exchanger shell and the combustion chamber when they are connected in Embodiment 1 of the present invention;

[0020] Figure 4 yes Figure 3 The enlarged view of point A in the middle;

[0021] Figure 5 is a schematic structural diagram of a heat exchanger shell according to Embodiment 2 of the present invention;

[0022] Figure 6 Schematic diagram of the connection between the heat exchanger shell and the combustion chamber of Example 2 of the present invention

[0023] Figure 7 is a cross-sectional schematic diagram of the heat exchanger shell and the combustion chamber when they are connected in Embodiment 2 of the present invention;

[0024] Figure 8 yes Figure 7 The enlarged view of point B in the middle;

[0025] Fig. 9 is a schematic diagram of the water flow direction when the heat exchanger of Example 2 of the present invention is connected to the combustion chamber;

[0026] Fig.10It is a schematic structural diagram of the combustion chamber shell of Example 3 of the present invention. DETAILED DESCRIPTION

[0027] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0028] Example 1

[0029] See also Figure 1 , a heat exchanger shell structure of a gas water heater, comprising:

[0030] Heat exchanger shell 2;

[0031] like Figure 1 As shown, the heat exchanger housing 2 is provided with a water-passing groove 5, and as shown in FIG. Figure 2 , 3 As shown, the heat exchanger shell 2 is covered on the combustion chamber 1 of the gas water heater;

[0032] like Figure 3 , 4 As shown, a water flow channel 6 for water to flow through is formed between the water-passing groove 5 and the outer wall of the combustion chamber 1;

[0033] Both ends of the water flow channel 6 are respectively connected to the water inlet pipe 3 and the water outlet pipe 4 of the heat exchanger.

[0034] Specifically, the water passage groove 5 includes a plurality of first grooves 501 .

[0035] Preferably, if Figure 1 , 2 As shown, each section of the first groove 501 is connected end to end in sequence, so that the water-passing groove 5 is arranged on the heat exchanger shell 2 in a spiral shape.

[0036] In the embodiment of the present invention, a water-passing groove is formed on the heat exchanger shell covering the outer wall of the combustion chamber shell, so that a water flow channel for water to flow through is formed between the water-passing groove and the outer wall of the combustion chamber shell; when flowing through the water flow channel, water can directly contact the outer wall of the combustion chamber shell, thereby directly absorbing the heat of the combustion chamber shell. Compared with the prior art, the heat generated by the combustion chamber needs to pass through the outer wall of the combustion chamber and the metal water pipe in sequence, and then be conducted to the water in the metal water pipe. The heat exchanger of the present invention has a larger heat exchange area and a shorter heat conduction distance, thereby greatly improving the heat exchange efficiency.

[0037] Furthermore, this embodiment arranges the water flow channel in a spiral shape on the heat exchanger and arranges the water flow channel on the outer wall of the combustion chamber, thereby further increasing the contact area between the water in the water flow channel and the combustion chamber, so that the water can absorb more heat when flowing through the water flow channel.

[0038] Example 2

[0039] This embodiment is a further improvement on the basis of embodiment 1. Figure 5 , 6 As shown, the main differences are:

[0040] Each section of the first groove 501 is horizontally arranged, and two adjacent sections of the first groove 501 are connected to each other.

[0041] Specifically, the water-passing groove 5 further includes a plurality of sections of second grooves 502 , and the second grooves 502 are used to connect two adjacent sections of the first grooves 501 .

[0042] Preferably, if Figure 7 , 8 As shown, a water-blocking sheet 7 is disposed in each section of the first groove 501 .

[0043] Preferably, the second groove forms a water inlet and a water outlet on two adjacent sections of the first groove respectively;

[0044] like Fig. 9 As shown, the water-blocking sheet is arranged near the water outlet, and the water-blocking sheet is arranged on a side of the water outlet close to the water inlet.

[0045] In this embodiment, a water-blocking sheet is arranged in each first groove, such as Figure 6 As shown in the figure (the dotted line with an arrow in the figure is the direction of water flow in the water flow channel), the blocking of the water baffle allows the water flow in the water flow channel to enter the adjacent first groove in an orderly manner through the second groove; and, by arranging the water baffle close to the water outlet in the water flow channel, and arranging it on the side of the water outlet close to the water inlet in the water flow channel, the water flow can flow through almost the entire water flow pipe before entering the adjacent second groove, thereby preventing the water flow from flowing into the water inlet and then entering the adjacent second groove after only flowing through a part of the water flow pipe.

[0046] In this embodiment, the first groove is arranged horizontally, and two adjacent first grooves are connected by the second groove, so that the water flow channel is divided into multiple horizontal channels and multiple vertical channels. The flow path of the water flow channel in this embodiment is different from that in Embodiment 1, so that the heat exchange area of ​​the heat exchanger in this embodiment is different. The manufacturer can also adjust the heat exchange area and change the heat exchange ratio by selecting the heat exchanger shell of different embodiments according to customer needs.

[0047] Example 3

[0048] This embodiment provides a heat exchanger for a gas water heater, which includes a combustion chamber, a water inlet pipe and a water outlet pipe, and also includes:

[0049] The heat exchanger shell structure described in Example 1 or Example 2.

[0050] like Figure 2 or Figure 6 As shown, preferably, the combustion chamber comprises a combustion chamber housing 1;

[0051] like Figure 8 , 10 As shown, an expansion groove 8 corresponding to the water passing groove 5 is arranged on the outer wall of the combustion chamber housing 1, and the water flow channel 5 is formed between the expansion groove 8 and the water passing groove 5.

[0052] In the embodiment of the present invention, an expansion groove is arranged on the outer wall of the combustion chamber shell, so that the expansion groove and the water-passing groove are combined to form a water flow channel; because the expansion groove is formed by bending toward the inner side of the combustion chamber shell, the contact area between the water in the water flow channel and the combustion chamber shell is further increased, thereby making the heat exchange efficiency higher.

[0053] Example 4

[0054] This embodiment provides a gas water heater, which includes the heat exchanger described in Embodiment 3.

[0055] The gas water heater and the heat exchanger and the heat exchanger shell structure of the present invention can more effectively increase the heat exchange area of ​​water, thereby further improving the heat exchange efficiency.

[0056] It should be noted that the shapes of the water passage and the expansion groove described in the above embodiments are not limited to arc shapes, but may also be various shapes such as ellipse, diamond, D-shape, etc.

[0057] Furthermore, those skilled in the art may combine and associate different embodiments or examples and features of different embodiments or examples described in this specification without mutual contradiction.

[0058] In the description of the present invention, it is necessary to understand that the terms "vertical", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the protection content of the present invention.

[0059] If the words "first", "second", etc. are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only to facilitate the description of the present invention and simplify the description. Unless otherwise stated, the above words have no special meaning.

[0060] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the scope of the claims and equivalent technologies of the present invention, the present invention is also intended to include these changes and modifications.

Claims

1. A heat exchanger shell structure for a gas water heater, It is characterized in that include: Heat exchanger housing; The heat exchanger shell is provided with a water-passing groove, and the heat exchanger shell is covered on the combustion chamber of the gas water heater, and a water flow channel for water flow is formed between the water-passing groove and the outer wall of the combustion chamber; the two ends of the water flow channel are respectively connected with the water inlet pipe and the water outlet pipe of the heat exchanger; The water-passing groove comprises a plurality of first groove sections, and each of the first groove sections is sequentially connected end to end, so that the water-passing groove is arranged on the heat exchanger shell in a spiral shape; Each section of the first groove is horizontally arranged, and two adjacent sections of the first groove are connected to each other; the water-passing groove also includes a plurality of sections of second grooves, and the second grooves are used to connect two adjacent sections of the first grooves; a water-blocking sheet is arranged in each section of the first groove.

2. The heat exchanger shell structure according to claim 1, Features: The second groove forms a water inlet and a water outlet on two adjacent sections of the first groove respectively; The water-blocking sheet is arranged near the water outlet, and the water-blocking sheet is arranged on a side of the water outlet close to the water inlet.

3. A heat exchanger for a gas water heater, It is characterized in that include: A combustion chamber, a water inlet pipe, a water outlet pipe and a heat exchanger shell structure of a gas water heater as claimed in any one of claims 1 to 2; The combustion chamber comprises a combustion chamber shell, and an expansion groove corresponding to the water passing groove is arranged on the outer wall of the combustion chamber shell, and the water flow channel is formed between the expansion groove and the water passing groove.

4. A gas water heater, It is characterized in that Comprising the heat exchanger as claimed in claim 3.

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