Balanced gas water heater

Abstract

The utility model relates to the technical field of hot water supply equipment, and discloses a balanced gas water heater which comprises an inner shell, an outer shell, an inner smoke exhaust pipe and an outer gas inlet pipe. Wherein a first opening communicated with the interior of the inner shell is formed in the inner shell; the outer shell sleeves the outer side of the inner shell and is provided with a second opening corresponding to the first opening; one end of the inner smoke exhaust pipe sequentially penetrates through the second opening and the first opening and extends into the inner shell; the outer air inlet pipe sleeves the outer side of the inner smoke exhaust pipe, one end of the outer air inlet pipe is hermetically communicated with the inner shell, and the edge of the first opening and the edge of the second opening are sealed, so that a first sound insulation cavity is formed between the inner shell and the outer shell. By arranging the double-layer shell composed of the inner shell and the outer shell, the possibility that sound in the balance type gas water heater leaks to the external environment can be reduced, and the sound insulation and mute effects of the balance type gas water heater are enhanced.

Description

Technical Field

[0001] This utility model relates to the field of hot water supply equipment technology, and in particular to a balanced gas water heater. Background Technology

[0002] A balanced flue gas water heater is a type of gas water heater that draws in air from the outside and exhausts flue gas to the outside. Therefore, it eliminates the need for an air inlet on the indoor casing, resulting in a well-sealed casing. Compared to other types of gas water heaters, balanced flue gas water heaters are considered "quiet."

[0003] However, even though the indoor casing of a balanced flue gas water heater has good sealing properties, the overall noise reduction effect of a balanced flue gas water heater is still limited by relying solely on the overall sealing of the indoor casing for sound insulation. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a balanced gas water heater, which effectively solves the problem of high operating noise of existing balanced gas water heaters and achieves the goal of quiet operation of balanced gas water heaters.

[0005] The above-mentioned technical problems are solved by the following technical solutions:

[0006] A balanced flue gas water heater includes: an inner shell, an outer shell, an inner exhaust pipe, and an outer air inlet pipe; wherein, the inner shell has a first opening communicating with its interior; the outer shell is fitted onto the outside of the inner shell and has a second opening corresponding to the first opening; one end of the inner exhaust pipe passes through the second opening and extends into the inner shell through the first opening; the outer air inlet pipe is fitted onto the outside of the inner exhaust pipe and its one end is sealed and communicated with the inner shell, and the edges of the first opening and the second opening form a seal to form a first sound insulation cavity between the inner shell and the outer shell.

[0007] Compared with the prior art, the balanced gas water heater of this utility model has the following advantages:

[0008] Compared to existing balanced flue gas water heaters, this invention, by enclosing an outer shell around an inner shell, effectively blocks the transmission of internal sound from the water heater to the external environment through both the inner and outer shells, enhancing the overall sound insulation and achieving quiet operation. Secondly, this invention seals one end of the external air inlet pipe to the inner shell, creating a seal between the edges of the first and second openings. This not only further ensures the overall airtightness of the inner and outer shells, preventing sound leakage through the gap at the connection between the external air inlet pipe and the inner shell, thus reducing noise interference for users, but also creates a sealed space between the inner and outer shells, restricting airflow and further reducing the possibility of sound leakage.

[0009] In one embodiment, one end of the external air intake pipe is sealed to the outer casing and communicates with the first opening and the second opening; the edge of the first opening is sealed to the edge of the second opening through a first annular baffle.

[0010] In one embodiment, the inner wall of the outer shell is spaced apart from the outer wall of the inner shell, and the first annular baffle, together with the internal space of the inner shell and the outer shell, defines a first sound insulation cavity; the first annular baffle is integrally formed with the external air intake pipe, and the shape of the first annular baffle is adapted to the shape of the external air intake pipe.

[0011] In one embodiment, one end of the external air intake pipe passes through the second opening and is sealed to the edge of the first opening, and the outer side wall of the external air intake pipe is sealed to the edge of the second opening.

[0012] In one embodiment, the first soundproof cavity is provided with sound-absorbing material.

[0013] In one embodiment, the balanced gas water heater further includes a soundproof pipe sleeved outside the external air inlet pipe, one end of which is sealed to the outer wall of the outer casing.

[0014] In one embodiment, the inner wall of the sound insulation tube is spaced apart from the outer wall of the external air intake tube, and a second annular baffle is provided at the end of the sound insulation tube and the external air intake tube away from the outer shell. The second annular baffle, together with the sound insulation tube and the external air intake tube, defines a second sound insulation cavity, and the second sound insulation cavity is provided with sound-absorbing material.

[0015] In one embodiment, the second annular baffle is integrally formed with the sound insulation tube, and the second annular baffle is provided with an annular through hole through which the external air intake pipe passes. The inner wall of the annular through hole of the second annular baffle is sealed to the outer wall of the external air intake pipe.

[0016] In one embodiment, the air intake pipe includes a first pipe segment and a second pipe segment connected together, the first pipe segment being connected to the first opening and the second opening and adapted to be installed indoors; the second pipe segment being adapted to be installed outdoors; and the sound insulation pipe being sleeved on the outside of the first pipe segment, or on the outside of the first pipe segment and at least part of the outside of the second pipe segment.

[0017] In one embodiment, the inner housing and the outer housing are sheet metal housings or plastic housings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of a balanced gas water heater according to an embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of another balanced gas water heater according to an embodiment of the present utility model;

[0021] Figure 3 for Figure 1 The diagram shows a balanced flue gas water heater equipped with sound insulation material.

[0022] Figure 4 for Figure 1 The diagram shows a balanced gas water heater equipped with a sound insulation pipe.

[0023] Figure 5 for Figure 4 The diagram shows a balanced gas water heater equipped with sound insulation material.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Inner shell; 101. First opening; 2. Outer shell; 201. Second opening; 3. Inner exhaust pipe; 4. Outer air intake pipe; 5. First sound insulation cavity; 6. Sound-absorbing material; 7. Sound insulation pipe; 8. Second sound insulation cavity; 9. First annular baffle; 10. Second annular baffle. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] The following is combined Figures 1 to 4 The following describes embodiments of the present invention.

[0031] According to embodiments of the present invention, such as Figure 1 and Figure 2As shown, a balanced gas water heater is provided, including: an inner shell 1, an outer shell 2, an inner exhaust pipe 3, and an outer air inlet pipe 4; wherein, the inner shell 1 is provided with a first opening 101 communicating with its interior; the outer shell 2 is sleeved on the outside of the inner shell 1 and is provided with a second opening 201 corresponding to the first opening 101; one end of the inner exhaust pipe 3 passes through the second opening 201 and the first opening 101 in sequence and extends into the inner shell 1; the outer air inlet pipe 4 is sleeved on the outside of the inner exhaust pipe 3 and one end of it is sealed and communicated with the inner shell 1, and the edges of the first opening 101 and the second opening 201 form a seal to form a first sound insulation cavity 5 between the inner shell 1 and the outer shell 2.

[0032] Compared to existing balanced flue gas water heaters, this invention, by enclosing an outer shell 2 over an inner shell 1, simultaneously blocks the transmission of internal sound from the balanced flue gas water heater to the external environment, enhancing the overall sound insulation and achieving quiet operation. Secondly, this invention seals one end of the external air inlet pipe 4 to the inner shell 1, and seals the edges of the first opening 101 and the second opening 201. This not only further ensures the overall airtightness of the inner shell 1 and outer shell 2, preventing sound leakage to the external environment through the gap between the external air inlet pipe 4 and the inner shell 1 or outer shell 2, reducing noise interference to users, but also creates a sealed space between the inner shell 1 and outer shell 2, restricting airflow and further reducing the possibility of sound leakage. Furthermore, the sealed space between the inner shell 1 and outer shell 2 allows all air from the external air inlet pipe 4 to flow into the interior of the inner shell 1, ensuring complete combustion of fuel within the inner shell 1.

[0033] It should be noted that "quiet" in this application does not mean completely silent. Currently, the operating noise range of balanced flue gas water heaters is 40dB to 45dB. The purpose of this application is to control the operating noise of balanced flue gas water heaters below 35dB. The reason for aiming to control the noise below 35dB is that the inventors learned from relevant materials that sound below 35dB is very quiet, roughly the same as the sound of a person speaking softly. Therefore, controlling the operating noise of balanced flue gas water heaters below 35dB will not cause discomfort to the human ear and can effectively improve the user experience.

[0034] Furthermore, the external environment referred to in this embodiment refers to the indoor environment in which the balanced flue gas water heater of this embodiment is installed. Specifically, during installation, parts of the internal exhaust pipe 3 and external air inlet pipe 4, as well as the inner shell 1 and outer shell 2, are installed indoors. Therefore, the main problem addressed by this application is to prevent sound from the balanced flue gas water heater from leaking into the indoor space through the aforementioned structures located indoors.

[0035] In one embodiment, such as Figure 2 As shown, one end of the external air intake pipe 4 is sealed to the outer casing 2 and connected to the first opening 101 and the second opening 201. This arrangement allows the sound inside the balanced gas water heater to leak into the external environment through the gap between the external air intake pipe 4 and the outer casing 2; on the other hand, it allows all the air in the external air intake pipe 4 to flow into the inner casing 1 and participate in the complete combustion process of the fuel.

[0036] Furthermore, the edge of the first opening 101 is sealed to the edge of the second opening 201 through the first annular baffle 9, which can restrict the flow of air between the inner shell 1 and the outer shell 2 and prevent the noise generated by the operation and combustion of the balanced gas water heater from being transmitted to the external environment.

[0037] It is understandable that, since the outer shell 2 is fitted onto the outside of the inner shell 1 in this embodiment, the relationship between the outer shell 2 and the inner shell 1 can be one of the following: 1. The inner wall of the outer shell 2 is completely attached to the outer wall of the inner shell 1; 2. The inner wall of the outer shell 2 is spaced apart from the outer wall of the inner shell 1; 3. Part of the inner wall of the outer shell 2 is attached to the outer wall of the inner shell 1. The first case is equivalent to increasing the overall thickness of the balanced gas water heater shell to reduce the ability of noise to propagate through the shell's sidewalls and improve the shell's sound insulation effect. The second case utilizes the first annular baffle 9 to form a first sound insulation cavity 5 between the first annular baffle 9, the inner shell 1, and the outer shell 2, using the relatively still air within the first sound insulation cavity 5 to block sound propagation. Specifically, when sound encounters air during propagation, the large distance between air molecules results in weak interaction forces, slow propagation speed, and easy energy loss. Therefore, when noise generated inside the balanced gas water heater propagates outward to the first sound insulation chamber 5, in the relatively still air environment, the sound waves will continuously reflect and scatter, and their energy will be continuously weakened. In this way, the possibility of noise being transmitted to the outside environment is reduced. The third scenario utilizes the two methods mentioned in the first and second scenarios to achieve the purpose of sound insulation and noise reduction.

[0038] In one embodiment, the first annular baffle 9 is integrally formed with the external air intake pipe 4, and the shape of the first annular baffle 9 matches the shape of the external air intake pipe 4. It can be understood that the integral formation of the first annular baffle 9 and the external air intake pipe 4 avoids the need for separate installation steps, reducing the complexity of the installation process for the balanced gas water heater; it also prevents sealing problems at the connection point between the first annular baffle 9 and the external air intake pipe 4 due to improper connection. Furthermore, ensuring that the shape of the first annular baffle 9 matches the shape of the external air intake pipe 4 allows for smoother and more stable airflow as air flows from the external air intake pipe 4 into the inner casing 1, reducing noise caused by turbulent airflow.

[0039] In one embodiment, such as Figure 1 As shown, one end of the external air intake pipe 4 passes through the second opening 201 and is sealed to the edge of the first opening 101. The outer wall of the external air intake pipe 4 is sealed to the edge of the second opening 201. Compared to additionally setting the first annular baffle 9, this embodiment directly passes one end of the external air intake pipe 4 through the second opening 201 and is sealed to the edges of the first opening 101 and the second opening 201, which can reduce the number of connecting parts used, reduce the complexity of assembly, and reduce the manufacturing cost of the balanced gas water heater.

[0040] In one embodiment, such as Figure 3 As shown, a sound-absorbing material 6 is provided inside the first soundproof cavity 5. Compared to relying solely on the still air inside the first soundproof cavity 5 to block noise, this embodiment, by providing the sound-absorbing material 6 inside the first soundproof cavity 5, can further absorb the propagation energy of sound and reduce the possibility of sound leakage. For example, the sound-absorbing material 6 can be, but is not limited to, sound-absorbing cotton, sound-insulating felt, polyester fiber, and foam.

[0041] In one embodiment, such as Figure 4 and Figure 5 As shown, the balanced flue gas water heater also includes a soundproof pipe 7 fitted outside the external air inlet pipe 4, with one end of the soundproof pipe 7 sealed to the outer wall of the outer casing 2. Since a portion of the external air inlet pipe 4 is located indoors, noise may be generated during the air supply process due to airflow friction, equipment vibration, etc. To prevent this noise from easily propagating into the room through the external air inlet pipe 4, this embodiment uses a soundproof pipe 7 fitted outside the external air inlet pipe 4 to absorb some noise energy and reduce the amount of noise radiated outwards.

[0042] It is understood that, since the sound insulation tube 7 in this embodiment is sleeved on the outside of the external air intake pipe 4, the relative positional relationship between the sound insulation tube 7 and the external air intake pipe 4 in this embodiment can be as follows: 1. The inner wall of the sound insulation tube 7 is completely attached to the outer wall of the external air intake pipe 4; 2. The inner wall of the sound insulation tube 7 is spaced apart from the outer wall of the external air intake pipe 4; 3. Part of the inner wall of the sound insulation tube 7 is attached to the outer wall of the external air intake pipe 4.

[0043] In one embodiment, such as Figure 4 and Figure 5 As shown, the inner wall of the soundproof tube 7 is spaced apart from the outer wall of the external air intake pipe 4. A second annular baffle 10 is provided at the end of the soundproof tube 7 and the external air intake pipe 4 furthest from the outer casing 2. The second annular baffle 10, together with the soundproof tube 7 and the external air intake pipe 4, defines a second soundproof cavity 8. Sound-absorbing material 6 is provided inside the second soundproof cavity 8. In this embodiment, by using the second annular baffle 10, a second soundproof cavity 8 is formed between the soundproof tube 7 and the external air intake pipe 4. Thus, like the first soundproof cavity 5, the relatively still air within the cavity can block the propagation of sound. Furthermore, the sound-absorbing material 6 placed inside the second soundproof cavity 8 can further absorb noise and weaken its intensity.

[0044] In one embodiment, such as Figure 4 and Figure 5 As shown, the second annular baffle 10 is integrally formed with the sound insulation tube 7. The second annular baffle 10 has an annular through hole through which the external air intake tube 4 passes. The inner wall of the annular through hole of the second annular baffle 10 is sealed to the outer wall of the external air intake tube 4. It can be understood that by providing an annular through hole on the second annular baffle 10, the assembly of the external air intake tube 4 and the sound insulation tube 7 can be facilitated. Integrating the second annular baffle 10 with the sound insulation tube 7 can reduce the potential noise leakage risk caused by splicing gaps while ensuring structural stability. Furthermore, the sealed connection between the inner wall of the annular through hole and the outer wall of the external air intake tube 4 can ensure that the second annular baffle 10, the sound insulation tube 7, and the external air intake tube 4 together form the second sound insulation cavity 8, so that the sealed air in the second sound insulation cavity 8 can play a good blocking role.

[0045] In one embodiment, the air inlet pipe includes a first pipe section and a second pipe section connected to each other. The first pipe section is connected to a first opening 101 and a second opening 201 and is adapted for installation indoors; the second pipe section is adapted for installation outdoors; and a sound-insulating pipe 7 is sleeved on the outside of the first pipe section, or on the outside of the first pipe section and at least part of the outside of the second pipe section. Since noise generated outdoors by a balanced flue gas water heater is difficult to transmit indoors, instead of extending part of the sound-insulating pipe 7 to the outside of the second pipe section located outdoors, choosing to sleeve the sound-insulating pipe 7 only on the outside of the first pipe section located indoors can reduce the overall manufacturing cost of the balanced flue gas water heater while ensuring quiet operation of the indoor portion. Furthermore, if the sound-insulating pipe 7 is also sleeved on the outside of the second pipe section, it can not only block noise and reduce the possibility of outdoor noise transmitting indoors, but also effectively protect the second pipe section and reduce the possibility of damage to it.

[0046] In one embodiment, the inner shell 1 and the outer shell 2 are sheet metal shells or plastic shells. Choosing sheet metal or plastic to manufacture the inner shell 1 and the outer shell 2 facilitates the production of inner shell 1 and outer shell 2 with good sealing performance; on the other hand, the sheet metal or plastic inner shell 1 and outer shell 2 themselves can directly absorb and reflect some of the noise.

[0047] It should be noted that the inner shell 1 and the outer shell 2 can both be sheet metal shells, or both be plastic shells, or one can be a sheet metal shell and the other a plastic shell. Specifically, adaptive adjustments can be made as needed, and this utility model does not impose specific limitations in this regard.

[0048] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0049] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A balanced flue gas water heater, characterized in that, include: The inner shell (1), outer shell (2), inner exhaust pipe (3), and outer air inlet pipe (4) are provided. The inner shell (1) is provided with a first opening (101) communicating with its interior. The outer shell (2) is fitted on the outside of the inner shell (1) and is provided with a second opening (201) corresponding to the first opening (101). One end of the inner exhaust pipe (3) passes through the second opening (201) and the first opening (101) and extends into the inner shell (1). The outer air inlet pipe (4) is fitted on the outside of the inner exhaust pipe (3) and one end of it is sealed and connected to the inner shell (1). The edge of the first opening (101) and the edge of the second opening (201) form a seal to form a first sound insulation cavity (5) between the inner shell (1) and the outer shell (2).

2. The balanced flue gas water heater according to claim 1, characterized in that: One end of the external air intake pipe (4) is sealed to the outer shell (2) and communicates with the first opening (101) and the second opening (201); the edge of the first opening (101) is sealed to the edge of the second opening (201) through the first annular baffle (9).

3. The balanced flue gas water heater according to claim 2, characterized in that: The inner wall of the outer shell (2) is spaced apart from the outer wall of the inner shell (1). The first annular baffle (9) together with the internal space of the inner shell (1) and the outer shell (2) defines the first sound insulation cavity (5). The first annular baffle (9) is integrally formed with the outer air intake pipe (4), and the shape of the first annular baffle (9) is adapted to the shape of the outer air intake pipe (4).

4. The balanced flue gas water heater according to claim 1, characterized in that: One end of the external air intake pipe (4) passes through the second opening (201) and is sealed to the edge of the first opening (101). The outer side wall of the external air intake pipe (4) is sealed to the edge of the second opening (201).

5. The balanced flue gas water heater according to claim 3, characterized in that: The first sound insulation cavity (5) is provided with sound-absorbing material (6).

6. The balanced flue gas water heater according to claim 1, characterized in that: It also includes a soundproof tube (7) sleeved outside the outer air intake pipe (4), one end of which is sealed to the outer wall of the outer shell (2).

7. The balanced flue gas water heater according to claim 6, characterized in that: The inner wall of the sound insulation tube (7) is spaced apart from the outer wall of the external air intake tube (4). The end of the sound insulation tube (7) and the external air intake tube (4) away from the outer shell (2) is provided with a second annular baffle (10). The second annular baffle (10), together with the sound insulation tube (7) and the external air intake tube (4), defines a second sound insulation cavity (8). The second sound insulation cavity (8) is provided with sound-absorbing material (6).

8. The balanced flue gas water heater according to claim 7, characterized in that: The second annular baffle (10) is integrally formed with the sound insulation tube (7). The second annular baffle (10) is provided with an annular through hole through which the external air intake pipe (4) passes. The inner wall of the annular through hole of the second annular baffle (10) is sealed to the outer wall of the external air intake pipe (4).

9. The balanced flue gas water heater according to claim 7, characterized in that: The air intake pipe includes a first pipe section and a second pipe section connected to each other. The first pipe section is connected to the first opening (101) and the second opening (201) and is suitable for installation indoors. The second pipe section is suitable for installation outdoors; the soundproof pipe (7) is sleeved on the outside of the first pipe section, or on the outside of the first pipe section and at least part of the outside of the second pipe section.

10. The balanced flue gas water heater according to any one of claims 1 to 9, characterized in that: The inner shell (1) and the outer shell (2) are sheet metal shells or plastic shells.

Images