Waste heat recovery device and gas water heater

Abstract

The utility model discloses a waste heat recovery device and a gas water heater, and relates to the technical field of water heaters, the waste heat recovery device comprises a device main body, an exhaust pipe and a recovery disc, the device main body is provided with an air inlet and an exhaust port, and the air inlet is communicated with a combustion chamber of the gas water heater; the exhaust pipe is arranged on the device main body and is communicated with the exhaust port; and the recovery disc is arranged on the device main body and is arranged on the peripheral wall of the exhaust pipe. According to the technical scheme, heat of smoke exhausted by the combustion chamber of the gas water heater can be recycled through the device body, the energy utilization efficiency of the gas water heater is improved, and energy waste is reduced. And secondly, the device main body and the recovery disc are integrally arranged, so that a connecting piece and a supporting structure required for independently mounting two parts are reduced, the overall structure is simplified, and the complexity of mounting and maintenance is reduced. In addition, the number of parts is reduced, and the manufacturing and inventory management cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas water heaters, and particularly relates to a waste heat recovery device and a gas water heater. Background Art

[0002] At present, the gas water heaters on the market are usually equipped with a rainwater recovery tray to avoid corrosion of the machine caused by rainwater backflow. However, the rainwater recovery tray is generally fixedly connected to the gas water heater panel by means of screw installation. This installation method has a relatively complex structure, which not only increases the installation difficulty, but also occupies a large space of the gas water heater. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a waste heat recovery device and a gas water heater, aiming to simplify the structure of the gas water heater.

[0004] To achieve the above object, the waste heat recovery device proposed by the utility model is applied to a gas water heater, and the waste heat recovery device includes:

[0005] A device main body, provided with an air inlet and an air outlet, and the air inlet is communicated with the combustion chamber of the gas water heater;

[0006] An exhaust pipe, arranged on the device main body and communicated with the air outlet; and

[0007] A recovery tray, arranged on the device main body and on the outer peripheral wall of the exhaust pipe.

[0008] In one embodiment, the recovery tray is welded to the device main body; or, the device main body and the recovery tray are integrally formed.

[0009] In one embodiment, the recovery tray is arranged around the outer peripheral wall of the exhaust pipe.

[0010] In one embodiment, the recovery tray includes a tray body, a first folding part and a second folding part; the first folding part and the second folding part are arranged on the same side of the tray body, and the first folding part, the tray body and the second folding part are sequentially bent and connected to enclose a groove; the tray body is connected to the device main body, and the first folding part surrounds the exhaust pipe.

[0011] In one embodiment, in the length extension direction of the groove, the tray body has a first end and a second end which are oppositely arranged, the first end is closer to the exhaust pipe than the second end, and the tray body is inclined downward from the first end to the second end.

[0012] In one embodiment, the downward inclination angle of the tray body is not less than 1° and not more than 3°;

[0013] And / or, the depth of the groove is greater than 5 mm.

[0014] In one embodiment, the disc body includes a water receiving portion, a flow guiding portion and a water collecting portion, the water receiving portion is arranged around the exhaust pipe, and the water receiving portion, the flow guiding portion and the water collecting portion are sequentially connected along the length extension direction of the groove.

[0015] In one embodiment, the groove includes a water receiving groove, a guide groove and a water collecting groove which are connected in sequence, and the water receiving groove, the guide groove and the water collecting groove correspond to the water receiving part, the guide part and the water collecting part respectively; the disc body also includes a connecting part, which is arranged on the water receiving part and is connected to the water receiving groove.

[0016] In one embodiment, the device body includes a shell and a waste heat exchanger, the shell is provided with a heat exchange chamber and an air inlet connected to the heat exchange chamber, the exhaust port and a condensation drain port, and the waste heat exchanger is arranged in the heat exchange chamber; the waste heat recovery device includes a condensation drain pipe, the condensation drain pipe is arranged in the device body and is connected to the condensation drain port, and the adapter and the condensation drain pipe are intersected and connected.

[0017] The utility model also discloses a gas water heater, which comprises a water heater body and a waste heat recovery device as described in any of the aforementioned embodiments, wherein the waste heat recovery device is arranged on the water heater body.

[0018] In the technical solution of the utility model, the heat of the flue gas discharged from the combustion chamber of the gas water heater can be recovered through the device body, thereby improving the energy utilization efficiency of the gas water heater and reducing energy waste. Secondly, the integrated arrangement of the device body and the recovery tray reduces the connectors and support structures required for the independent installation of the two components, simplifies the overall structure, and reduces the complexity of installation and maintenance. In addition, reducing the number of parts can also reduce manufacturing and inventory management costs. Furthermore, the integrated design makes the overall structure of the gas water heater more compact, saves internal space, and enables the device to adapt to more installation environments, especially in places with limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 A schematic structural diagram of an embodiment of a gas water heater provided by the utility model;

[0021] Figure 2 for Figure 1 A partial enlarged view of

[0022] Figure 3 A schematic structural diagram of an embodiment of a waste heat recovery device provided by the utility model;

[0023] Figure 4 for Figure 3 Another side view of .

[0024] Description of Figure Numbers:

[0025] 1. Gas water heater; 10. Waste heat recovery device; 100. Device body; 110. Shell; 111. Heat exchange chamber; 112. Air inlet; 113. Exhaust port; 114. Condensate drain port; 120. Waste heat heat exchanger; 200. Exhaust pipe; 300. Condensate drain pipe; 400. Recovery tray; 410. Tray body; 411. Water receiving part; 412. Guide part; 413. Water collecting part; 414. Adapter; 420. First folding part; 430. Second folding part; 401. Groove.

[0026] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0030] The present utility model provides a waste heat recovery device which is applied to a gas water heater and aims to simplify the structure of the gas water heater. For the convenience of understanding and description, in the attached Figures 1 to 4 of the specification of the present utility model, the solid-line arrows indicate spaces, grooves or holes.

[0031] Please refer to Figures 1 to 4 , in an embodiment of the present utility model, the waste heat recovery device 10 includes a device main body 100, an exhaust pipe 200 and a recovery tray 400. The device main body 100 is provided with an air inlet 112 and an air outlet 113, and the air inlet 112 is communicated with the combustion chamber of the gas water heater 1; the exhaust pipe 200 is arranged in the device main body 100 and is communicated with the air outlet 113; the recovery tray 400 is arranged in the device main body 100 and is arranged on the outer peripheral wall of the exhaust pipe 200.

[0032] Regarding the waste heat recovery device 10, the waste heat recovery device 10 is applied to the gas water heater 1 and is a device for recovering the heat in the waste gas discharged during the operation of the gas water heater 1. By recovering this heat, the energy utilization efficiency of the water heater can be improved, gas consumption can be reduced, operating costs can be lowered, and at the same time, greenhouse gas emissions can be reduced. Among them, the waste heat recovery device 10 includes a device main body 100, and the device main body 100 includes a housing 110 and a waste heat exchanger 120. The housing 110 is provided with a heat exchange chamber 111 and an air inlet 112 and an air outlet 113 communicated with the heat exchange chamber 111. The air inlet 112 is communicated with the combustion chamber of the gas water heater 1, and an exhaust pipe 200 is installed at the air outlet 113. Before the cold water enters the main heat exchanger of the water heater, it first passes through the heat exchanger of the waste heat recovery device 10 to exchange heat with the high-temperature waste gas, absorb the heat in the waste gas, preheat the cold water, and then the preheated water enters the water heater to be heated to the set temperature.

[0033] Regarding the recovery tray 400, in a water heater equipped with the waste heat recovery device 10, condensed water will be generated after the waste heat of the flue gas is absorbed. Therefore, the exhaust pipe 200 is horizontal or inclined upward. In some cases, rainwater will flow back along the pipe into the machine, causing corrosion of the machine and affecting normal operation. Thus, the recovery tray 400 provided in the technical solution of the present utility model is mainly used to recover rainwater or other water that flows back from the exhaust pipe 200 to the water heater, hereinafter simply referred to as the returned water.

[0034] In this embodiment, in order to simplify the structure of the gas water heater 1, the device main body 100 of the waste heat recovery device 10 and the recovery tray 400 are integrally arranged. Specifically, the recovery tray 400 is arranged on the device main body 100 and on the outer peripheral wall of the exhaust pipe 200. There are many ways to integrate the device main body 100 and the recovery tray 400. For example, the recovery tray 400 is welded to the device main body 100; or, the device main body 100 and the recovery tray 400 are integrally formed. The way of integrally forming the device main body 100 and the recovery tray 400 can be injection molding, die casting, hot pressing, welding molding, etc.

[0035] Among them, injection molding means that the device main body 100 and the recovery tray 400 are formed at one time with plastic materials. Die casting means that the device main body 100 and the recovery tray 400 are integrally formed by die casting process using metal materials such as aluminum alloy. Hot pressing is to heat the thermoplastic material to a softened state and integrally hot press the device main body 100 and the recovery tray 400 through a mold. Welding molding means that after the device main body 100 and the recovery tray 100 are respectively formed, they are connected into one body through a welding process. Preferably, the technical solution of the present embodiment adopts welding molding.

[0036] The technical solution of the present utility model has the following beneficial effects:

[0037] First of all, the device main body 100 can recover the heat of the flue gas discharged from the combustion chamber of the gas water heater, improve the energy utilization efficiency of the gas water heater 1, and reduce energy waste. Secondly, the integrated arrangement of the device main body and the recovery tray 400 reduces the connecting parts and supporting structures required for independently installing the two components, simplifies the overall structure, and reduces the complexity of installation and maintenance. In addition, reducing the number of parts can also reduce the manufacturing and inventory management costs. Moreover, the integrated design makes the overall structure of the gas water heater 1 more compact, saves internal space, and enables the device to adapt to more installation environments, especially in occasions with limited space.

[0038] In one embodiment, please refer to Figure 4, to further improve the flexibility of the water heater installation, the recovery tray 400 is arranged around the outer peripheral wall of the exhaust pipe 200. In this way, no matter how the direction of the exhaust pipe 200 faces, the water flowing back from the exhaust pipe 200 can be recovered. In other embodiments, the recovery tray 400 can be arranged on one side of the outer peripheral wall of the exhaust pipe 200, or the recovery tray 400 is arranged around the outer peripheral wall of the exhaust pipe 200, but not in a complete surrounding setting. For example, the recovery tray 400 is arranged around one-third or one-half of the outer peripheral wall of the exhaust pipe 200.

[0039] In an exemplary embodiment, as Figures 2 to 4 , the recovery tray 400 includes a tray body 410, a first folding portion 420, and a second folding portion 430; the first folding portion 420 and the second folding portion 430 are arranged on the same side of the tray body 410, and the first folding portion 420, the tray body 410, and the second folding portion 430 are sequentially bent and connected to enclose a groove 401; the tray body 410 is connected to the device main body 100, and the first folding portion 420 is arranged around the exhaust pipe 200.

[0040] In the length extension direction of the groove 401, the tray body 410 has a first end and a second end arranged oppositely, the first end is closer to the exhaust pipe 200 than the second end, and the tray body 410 is inclined downward from the first end. Preferably, the angle of the tray body 410 inclined downward is not less than 1° and not greater than 3°. It should be understood that it is the angle between the tray body 410 and the horizontal direction with respect to the horizontal line at the position of the first end of the tray body 410. Among them, the value range of this angle includes but is not limited to 1°, 1.2°, 1.4°, 1.5°, 1.6°, 1.8°, 2°, 2.2°, 2.4°, 2.5°, 2.6°, 2.8°, and 3°.

[0041] In another embodiment, to ensure the effect of the recovery tray 400 collecting the backflow water, the depth of the groove 401 is greater than 5 mm. Exemplarily, the value range of the depth of the groove 401 includes but is not limited to 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, and 20 mm, etc. Of course, the depth of the groove 401 cannot be too large, otherwise it will occupy too much space and the manufacturing cost will also increase accordingly.

[0042] It should be understood that in the embodiments of the present invention, the above-mentioned "inclined downward" is determined after the gas water heater 110 is installed in the building.

[0043] In an exemplary embodiment, the disc body 410 includes a water receiving portion 411 and a flow guiding portion 412 connected to each other, the water receiving portion 411 is arranged around the exhaust pipe 200, and the flow guiding direction of the flow guiding portion 412 is arranged to be inclined downward from the water receiving portion 411. The water receiving portion 411 is used to collect the backflow water at the exhaust pipe 200, and the flow guiding portion 412 guides the backflow water collected by the water receiving portion 411 to flow out.

[0044] In one embodiment, in order to facilitate the return of water, the disk body 410 further includes a water collecting portion 413 , and the water receiving portion 411 , the flow guiding portion 412 and the water collecting portion 413 are sequentially connected along the flow guiding direction of the flow guiding portion 412 .

[0045] In one embodiment, the groove 401 includes a water receiving groove, a guide groove and a water collecting groove which are connected in sequence, and the water receiving groove, the guide groove and the water collecting groove correspond to the water receiving part 411, the guide part 412 and the water collecting part 413 respectively; the disc body 410 also includes a connecting part 414, and the connecting part 414 is arranged on the water receiving part 411 and connected to the water receiving groove.

[0046] The adapter 414 is a quick connector or a quick connector nozzle, which is a connection device for quickly connecting and disconnecting pipes, hoses or equipment. In this embodiment, the adapter 414 and the water receiving part 411, the guide part 412 and the water collecting part 413 are usually formed in one piece. In this way, it is convenient to connect it with the drain pipe during installation. The design of the adapter 414 makes the connection between the recovery tray 400 and the drain pipe very simple, without the need to use complex tools, saving time and effort.

[0047] In one embodiment, the device body 100 includes a shell 110 and a waste heat exchanger 120, wherein the shell 110 is provided with a heat exchange chamber 111 and an air inlet 112, an exhaust port 113 and a condensation drain port 114 connected to the heat exchange chamber 111, and the waste heat exchanger 120 is arranged in the heat exchange chamber 111; the waste heat recovery device 10 includes a condensation drain pipe 300, which is arranged in the device body 100 and connected to the condensation drain port 114, and the adapter 414 and the condensation drain pipe 300 are intersectingly connected and connected. In this embodiment, the condensed water generated by the waste heat recovery device 10 and the water collected by the recovery tray 400 can be discharged through a unified drainage system, thereby avoiding the complexity and potential blockage problems of multiple drainage systems.

[0048] In summary, the technical solution of the present utility model not only optimizes the internal structure of the gas water heater 1 by integrally arranging the device main body 100 and the recovery tray 400, but also improves its functionality and reliability, meeting the requirements of modern gas water heaters 1 for efficient, compact, and low-cost designs. For example, it can significantly reduce the occupied space inside the gas water heater 1, making the design more compact and adaptable to more installation environments. Integrally arranging the device main body 100 and the recovery tray 400 reduces the connecting parts and support structures required for separately installing the two components, thus simplifying the overall structure and reducing the complexity of assembly and disassembly. Integrally arranging the device main body 100 and the recovery tray 400 can also reduce the number of components and assembly processes, thereby reducing production and maintenance costs and improving production efficiency. Additionally, it can reduce the connection points and potential water leakage risks, enhancing the overall reliability and durability of the system. Further, the condensed water generated by the device main body 100 and the rainwater collected by the recovery tray 400 can be discharged through a unified drainage system, avoiding the complexity of multiple drainage systems and potential blockage problems. Integrally arranging the device main body 100 and the recovery tray 400 facilitates maintenance personnel to quickly identify and handle problems during maintenance, reducing maintenance time and difficulty and improving maintenance efficiency.

[0049] The present utility model also proposes a gas water heater 1, which includes a water heater main body and a waste heat recovery device 10. The waste heat recovery device 10 is provided on the water heater main body, usually on the top surface of the water heater main body. The specific structure of the waste heat recovery device 10 refers to the above embodiments. Since this gas water heater 1 adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.

[0050] Among them, the water heater main body usually includes a housing 110, a burner, a main heat exchanger, an ignition device, an electric control box, a control valve assembly, an expansion tank, etc. The burner, the main heat exchanger, the ignition device, the electric control box, the control valve assembly, and the expansion tank are usually provided inside the housing 110. The burner is one of the core components of the gas water heater 1, responsible for mixing and burning gas with air to generate heat; the main heat exchanger is used to transfer the heat generated by the burner to the water flowing through it; the ignition device is used to ignite the gas in the burner, which can be electric spark ignition or thermocouple ignition; the electric control box is used to manage and control various electronic and electrical functions. The electric control box usually contains multiple circuit boards, sensor interfaces, control software, and other electronic components, responsible for coordinating various operations of the water heater. The housing 110, the control valve assembly, and the expansion tank will be specifically described below.

[0051] The above are only exemplary embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A waste heat recovery device, applied to a gas water heater, characterized in that: include: The device body is provided with an air inlet and an exhaust port, wherein the air inlet is communicated with the combustion chamber of the gas water heater; an exhaust pipe, disposed on the device body and connected to the exhaust port; and The recovery plate is arranged on the device body and on the outer peripheral wall of the exhaust pipe.

2. The waste heat recovery device according to claim 1, characterized in that: The device body and the recovery tray are integrally formed.

3. The waste heat recovery device according to claim 1, characterized in that: The recovery plate is arranged around the outer peripheral wall of the exhaust pipe.

4. The waste heat recovery device according to claim 3, characterized in that: The recovery plate includes a plate body, a first folding portion and a second folding portion; the first folding portion and the second folding portion are arranged on the same side of the plate body, the first folding portion, the plate body and the second folding portion are bent and connected in sequence to form a groove, the plate body is connected to the device body, and the first folding portion is arranged around the exhaust pipe.

5. The waste heat recovery device according to claim 4, characterized in that: In the length extension direction of the groove, the disc body has a first end and a second end that are oppositely arranged, the first end is arranged close to the exhaust pipe relative to the second end, and the disc body is arranged to tilt downward from the first end to the second end.

6. The waste heat recovery device according to claim 5, characterized in that: The angle at which the disk body is tilted downward is not less than 1° and not more than 3°; And / or, the depth of the groove is greater than 5 mm.

7. The waste heat recovery device according to claim 5, characterized in that: The disc body comprises a water receiving portion, a flow guiding portion and a water collecting portion, the water receiving portion is arranged around the exhaust pipe, and the water receiving portion, the flow guiding portion and the water collecting portion are sequentially connected along the length extension direction of the groove.

8. The waste heat recovery device according to claim 7, characterized in that: The groove includes a water receiving groove, a guide groove and a water collecting groove which are connected in sequence, and the water receiving groove, the guide groove and the water collecting groove correspond to the water receiving part, the guide part and the water collecting part respectively; the disc body also includes a transition part, which is arranged on the water receiving part and connected with the water receiving groove.

9. The waste heat recovery device according to claim 8, characterized in that: The device body includes a shell and a waste heat exchanger, the shell is provided with a heat exchange chamber and an air inlet, an exhaust port and a condensation drain port connected to the heat exchange chamber, and the waste heat exchanger is arranged in the heat exchange chamber; the waste heat recovery device includes a condensation drain pipe, the condensation drain pipe is arranged in the device body and is connected to the condensation drain port, and the adapter and the condensation drain pipe are intersected and connected.

10. A gas water heater, characterized in that: include: The water heater body, and The waste heat recovery device according to any one of claims 1 to 9, wherein the waste heat recovery device is arranged on the water heater body.

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