Gas water heater housing and gas water heater

Abstract

This application relates to the technical field of gas appliances. An embodiment of this application provides a gas water heater housing and a gas water heater. The gas water heater housing at least includes a bottom case and a cover plate. In the above-mentioned gas water heater housing, by arranging a cover plate on the air intake side, a first air intake channel that can intake air from two directions is formed. It can not only increase the air intake area, but also, while ensuring the air intake volume, the air entering the inside of the bottom case from the outside to participate in combustion can help to quickly circulate in the first air intake channel, playing a role in cooling the back of the bottom case. And noise is more likely to attenuate during propagation at low temperatures, so the noise decibel can be reduced. In addition, the first cavity defined by the enclosure of the cover plate and the bottom case can also play a role in attenuating the transverse wave of the sound wave.

Description

Technical Field

[0001] The present application relates to the technical field of gas appliances, and in particular to a gas water heater housing and a gas water heater having the same. Background Art

[0002] In the related art, openings are usually provided on the bottom case of a gas water heater to allow air to enter through the openings. However, various sound sources generated by combustion inside the gas water heater will diffuse out through the openings, generating noise. Summary of the Invention

[0003] Based on this, in view of the above technical problems, it is necessary to provide a gas water heater housing and a gas water heater having the same to reduce the noise generated by the gas water heater.

[0004] According to one aspect of the present application, an embodiment of the present application provides a gas water heater housing, including:

[0005] A bottom case provided with a first air inlet; and

[0006] A cover plate located on the air inlet side of the first air inlet, and the orthographic projection of the cover plate on the bottom case covers the first air inlet;

[0007] Wherein, the cover plate and the bottom case enclose and define a first cavity with an opening, one end of the cover plate and the bottom case enclose to form the opening, and a second air inlet communicating with the first cavity is provided on the side of the cover plate facing the bottom case, so as to form a first air inlet passage through which fluid can enter the first air inlet from the opening along a first direction and from the second air inlet along a second direction;

[0008] The first direction and the second direction are arranged at an angle.

[0009] In the above gas water heater housing, by providing a cover plate on the air inlet side, a first air inlet passage that can intake air from two directions is formed. It can not only increase the air intake area, but also, while ensuring the air intake volume, the air entering the bottom case from the outside to participate in combustion can help to circulate quickly in the first air inlet passage, playing a role in cooling the back of the bottom case. And noise is more likely to attenuate during propagation at low temperatures, thereby reducing the noise decibel. In addition, the first cavity can also play a role in attenuating the transverse wave of the sound wave. The embodiments of the present utility model can help to reduce the noise generated during a large amount of air intake and improve the noise reduction ability of the gas water heater.

[0010] In one of the embodiments, the first direction is perpendicular to the second direction. In this way, the distribution of the air intake flow direction can be further realized to prevent the formation of eddy currents in the air intake airflow.

[0011] In one embodiment, a flow guide is provided at the first air inlet on the bottom shell;

[0012] The flow guide has a flow guiding surface that bends towards the opening to guide the fluid towards the first air inlet. In this way, by setting the flow guide, most of the air flow can be intercepted and introduced into the first air inlet, making the flow direction of the air flow more directional, allowing it to flow regularly and not easily generating eddy currents, further achieving the purpose of noise reduction.

[0013] In one embodiment, a plurality of first air inlet holes are formed in the first air inlet, and a plurality of the flow guides are provided;

[0014] The plurality of flow guides correspond to the plurality of first air inlet holes one by one. In this way, the flow direction of the air flow can be made more regular and less likely to generate eddy currents.

[0015] In one embodiment, along the second direction, there is a gap between the surface of the cover plate facing the bottom shell and the flow guide. In this way, the air flow can also flow through this gap, further distributing the flow direction of the air flow and achieving the purpose of noise reduction.

[0016] In one embodiment, the flow guide includes a louver. In this way, the louver structure can be used for flow guiding.

[0017] In one embodiment, a plurality of second air inlet holes arranged in an array are formed in the second air inlet. In this way, by setting the regularly arranged second air inlet holes, the intake air flow can be more evenly forced to be distributed, making the air flow direction stable and preventing local aggregation of the air flow to form eddy currents.

[0018] In one embodiment, the second air inlet holes include circular holes, square holes, oval holes, waist-shaped holes, triangular holes or pentagonal holes. In this way, by designing the shape of the second air inlet holes, the intake air flow can be more evenly distributed.

[0019] In one embodiment, the air inlet area of the first air inlet is W1, the air inlet area of the second air inlet is W2, and the air inlet area of the opening is W3; wherein, W1 ≥ W2 + W3. In this way, the intake air volume required for combustion can be ensured.

[0020] In one embodiment, within a unit time, the air volume passing through the second air inlet is Q1, the air volume passing through the opening is Q2, and the theoretically required intake air volume during the maximum load combustion of the gas water heater is Q3; wherein, (Q1 + Q2) / Q3 = 1.1 - 1.35. In this way, the intake air volume required for combustion can be ensured.

[0021] In one embodiment, the gas water heater housing further includes a partition board;

[0022] The partition board is located on the air outlet side of the first air inlet, and the orthographic projection of the partition board on the bottom case covers the first air inlet; the partition board and the bottom case enclose and define a second cavity, and a third air inlet communicating with the second cavity is provided on the partition board;

[0023] Wherein, a tortuous second air inlet passage is formed between the first air inlet and the third air inlet. Thus, by setting the tortuous second air inlet passage, the transmission path of sound waves is extended, and effective noise reduction is achieved.

[0024] In one embodiment, the orthographic projection area of the partition board on the bottom case is S1, and the area of the side of the bottom case facing the partition board is S2;

[0025] Wherein, the ratio of S1 to S2 is 0.5 - 0.8. Thus, the partition board can better cool the bottom case and isolate noise.

[0026] According to another aspect of the present application, a gas water heater includes the gas water heater housing described above. Thus, by using this gas water heater housing, the noise generated when using the gas water heater can be reduced.

[0027] Additional aspects and advantages of the embodiments of the present application will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the embodiments of the present application. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of a gas water heater housing in an embodiment of the related art;

[0029] Figure 2 It is an exploded structural diagram of a gas water heater housing in an implementation manner of an embodiment of the present application;

[0030] Figure 3 It is a schematic side view structural diagram of a gas water heater housing in an implementation manner of an embodiment of the present application;

[0031] Figure 4 In the embodiment of the present application Figure 3 The enlarged partial structural diagram at G;

[0032] Figure 5 In the embodiment of the present application Figure 4 The enlarged partial structural diagram at K.

[0033] Brief Description of the Element Symbols:

[0034] Bottom case 100, first air inlet 110, and flow guide member 120;

[0035] Cover plate 200, second air inlet 210;

[0036] Partition plate 300, third air inlet 310;

[0037] Side plate 400;

[0038] Upper baffle 500;

[0039] Lower baffle 600;

[0040] First cavity a, opening a1, second cavity b;

[0041] First direction y, second direction x, gap g. Detailed implementation manners

[0042] To make the above objects, features, and advantages of the present application more obvious and understandable, the following will describe in detail the specific implementation manners of the embodiments of the present application with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the embodiments of the present application. It should be understood that the specific embodiments described herein are merely for explaining the present application and are not used to limit the present application. The embodiments of the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the embodiments of the present application are not limited by the specific embodiments disclosed below.

[0043] It can be understood that the terms "first", "second", "third", etc. used in the present application can be used herein to describe various professional terms, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. However, unless otherwise specified, these professional terms are not restricted by these terms. These terms are only used to distinguish one professional term from another. For example, without departing from the scope of the present application, the first air inlet, the second air inlet, and the third air inlet are different air inlets, the first cavity and the second cavity are different cavities, and the first direction and the second direction are different directions. In the description of the embodiments of the present application, the meanings of "multiple" and "several" are at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0045] In the description of the embodiments of the present application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than the horizontal height of the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than the horizontal height of the second feature.

[0046] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0047] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by those skilled in the technical field to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application.

[0048] With the increasing living standards, in addition to meeting the basic functional requirements of users for water heaters, the noise generated by gas water heaters has also become an important factor for consumers to choose whether to purchase the gas water heater. At present, the overall noise of gas water heaters on the market is mostly around 55 decibels. Medically, people are prone to moderate hearing damage when staying in an environment of 55 decibels for a long time. Therefore, on the premise of ensuring that the basic functions of gas water heaters meet the requirements, it is necessary to develop quieter silent products.

[0049] Figure 1 The structural schematic diagram of the shell of a gas water heater in an embodiment of the related art is shown; for the convenience of description, only the part related to the embodiment in the related art is shown.

[0050] For ease of understanding, asFigure 1 As shown in the figure, the top of the drawing is defined as the top, the bottom of the drawing is defined as the bottom, the left side of the drawing is defined as the front side, the right side of the drawing is defined as the back side, the left side of the drawing is defined as the right side, and the right side of the drawing is defined as the left side. Figure 1 It is understood that the above definition is for illustration only and cannot be understood as a limitation of the present application. It should be noted that the front side refers to the side facing the user, and the rear side refers to the side away from the user.

[0051] like Figure 1 As shown, a hole is usually opened on the bottom shell 100 of the gas water heater to allow air to enter through the hole to meet the needs of the combustion process.

[0052] The noise sources of gas water heaters include electromagnetic noise, combustion vibration noise, water flow noise, vaporization noise, fan noise, and aerodynamic noise, etc. The inventor of the present application noticed that during the air intake process of the combustion water heater, various sound sources generated by internal combustion are directly transmitted to the air through the openings on the bottom shell 100, and the noise is not attenuated and directly transmitted to the user's ears.

[0053] Based on this, the embodiment of the present application can attenuate the noise during the transmission process by changing the air intake mode and the air intake channel, thereby achieving the purpose of noise reduction. The following is a description of the gas water heater housing provided in the embodiment of the present application in combination with the relevant descriptions of some embodiments.

[0054] Figure 2 A schematic diagram of the explosion structure of a gas water heater housing in one implementation of an embodiment of the present application is shown; Figure 3 A schematic diagram of the side structure of a gas water heater housing in one embodiment of the present application is shown; Figure 4 In the embodiment of the present application, Figure 3 A schematic diagram of the local enlarged structure at G; for ease of explanation, only the parts related to the embodiment of the present application are shown.

[0055] Please refer to Figures 2 to 4 The embodiment of the present application provides a gas water heater housing, which includes a bottom shell 100 and a cover plate 200. The bottom shell 100 is provided with a first air inlet 110. The cover plate 200 is located on the air inlet side of the first air inlet 110 (i.e., Figures 2 to 4 The cover plate 200 and the bottom shell 100 are enclosed to define a first cavity a with an opening a1, one end of the cover plate 200 and the bottom shell 100 are enclosed to form the opening a1, and the side of the cover plate 200 facing the bottom shell 100 is provided with a second air inlet 210 connected to the first cavity a, so as to form a fluid that can flow in the first direction y( Figure 3in the bottom-to-top direction shown in [figure], from the opening a1, along the second direction x ( Figure 3 in the front-to-back direction shown in [figure]) enters the first intake passage of the first intake port 110 from the second intake port 210. The first direction y and the second direction x are arranged at an angle.

[0056] It should be noted that the first intake port 110 provided on the bottom case 100 can be provided at the upper part of the bottom case 100, or can be provided in the middle of the bottom case 100, or can also be provided at the lower part of the bottom case 100 and other positions. Figures 2 to 4 The situation shown is that it is provided at the lower part of the bottom case 100, and the embodiments of the present application do not make specific limitations on this. "The orthographic projection of the cover plate 200 on the bottom case 100" means that the parallel projection rays of the projection of the cover plate 200 are perpendicular to the plane where the bottom case 100 is located. Taking Figure 3 as an example, the direction of the parallel projection rays is the front-to-back direction. That is to say, in this direction, the cover plate 200 is arranged relative to the first intake port 110. And in the front-to-back direction, the second intake port 210 provided on the cover plate 200 and the first intake port 110 can be arranged staggeredly, or can be arranged non-staggeredly. It can be understood that the "staggered" mentioned here means that in the up-and-down direction, the heights of the second intake port 210 and the first intake port 110 are different, and the "non-staggered" means that in the up-and-down direction, the heights of the second intake port 210 and the first intake port 110 are the same. "The cover plate 200 and the bottom case 100 enclose and define a first cavity a with an opening a1" means that at least one of the cover plate 200 and the bottom case 100 has a part that is recessed in a direction away from the other. Taking Figure 2 as an example. Figure 2 The situation shown is that the cover plate 200 has a part that is recessed in a direction away from the bottom case 100 (that is, Figure 2 the backward direction shown in [figure]). The upper end, left end and right end of the cover plate 200 all have flanges. The cover plate 200 is detachably connected to the back of the bottom case 100 by means of these flanges. There is a distance between the lower end of the cover plate 200 and the bottom case 100. In this way, the cover plate 200 and the bottom case 100 enclose and define a first cavity a with an opening a1 on the lower side. Of course, it is also possible to provide a part on the bottom case 100 corresponding to the cover plate 200 that is recessed in a direction away from the cover plate 200 to form the first cavity a, or it is also possible to provide such recessed parts on both the bottom case 100 and the cover plate 200 to form the first cavity a, as long as the first cavity a can be formed. The embodiments of the present application do not make specific limitations on this.

[0057] Thus, by providing a cover plate 200 on the intake side, a first intake passage that can intake air from two directions is formed. It can not only increase the intake area, but also, while ensuring the intake air volume, the air that enters the interior of the bottom case 100 from the outside and participates in combustion can help to quickly circulate in the first intake passage, playing a role in cooling the back of the bottom case 100. And noise is more likely to attenuate during propagation at low temperatures, which can further reduce noise. In addition, since there are two waveforms, longitudinal waves and transverse waves, during the propagation of sound waves in a medium, sound waves will propagate in the form of longitudinal waves, transverse waves, or a superposition of the two waveforms. When propagating in a solid, there are both longitudinal waves and transverse waves, but when propagating in gases and liquids, they can only propagate in the form of longitudinal waves. Therefore, the first cavity a can also play a role in attenuating the transverse waves of sound waves.

[0058] In order to utilize the intake of air from two different directions to distribute the flow direction of the intake air and further prevent the intake air flow from forming a vortex, in some embodiments, please continue to refer to Figure 3 , the first direction y is perpendicular to the second direction x. Taking Figure 3 as an example, Figure 3 it is shown schematically that the first direction y is the direction from bottom to top, and the second direction x is the direction from back to front. Of course, when the cover plate 200 and the bottom case 100 enclose and define a first cavity a with an opening a1 on the upper side, the first direction y is the direction from top to bottom. The embodiments of the present application do not make specific limitations on this.

[0059] Through further research, it is found that the reason for the generation of gas vortices is that the air in different directions forms a swirling air flow. If the air flow directly enters the first cavity a from the opening a1 and the second intake port 210, the air flow is likely to collide at the bottom of the bottom case 100 and the cover plate 200, and the air flow will rebound, resulting in multiple flow directions of the air flow in the first cavity a and being prone to generating vortices.

[0060] In some embodiments, please continue to refer to Figure 4 , and in combination with Figure 3 , a flow guiding member 120 is provided on the bottom case 100 at the first intake port 110. The flow guiding member 120 has a flow guiding surface that bends towards the opening a1 for guiding the fluid towards the first intake port 110. In this way, by providing the flow guiding member 120, most of the air flow can be intercepted and guided into the first intake port 110, making the flow direction of the air flow more directional, enabling regular flow, not easily generating vortices, and further achieving the purpose of noise reduction. Specifically in some embodiments, please continue to refer to Figure 4, the first air inlet 110 is formed with a plurality of first air inlet holes, and a plurality of flow guides 120 are provided. The plurality of flow guides 120 correspond one-to-one to the plurality of first air inlet holes. In this way, the flow direction of the airflow can be made more regular and less prone to vortexes. Specifically in some embodiments, the plurality of first air inlet holes can be arranged in an array, and correspondingly, the plurality of flow guides 120 can also be arranged in an array, so that the flow direction of the gas can be further made more regular. Specifically in other embodiments, in order to further prevent the generation of vortices, the first air inlet 110 and the second air inlet 210 can be staggered, so that the air entering from the second air inlet 210 can be further distributed.

[0061] It should be noted that, in order to meet the need for flow guidance, the bending direction of the flow guiding surface of the flow guiding member 120 corresponds to the opening a1. Figure 4 The diagram shows a situation where the opening a1 is located at the lower side and the guide member 120 is bent downward.

[0062] Figure 5 In the embodiment of the present application, Figure 4 A schematic diagram of the local enlarged structure at K; for ease of explanation, only the parts related to the embodiment of the present application are shown.

[0063] In some embodiments, please refer to Figure 5 , and combined with Figure 4 , along the second direction x, the surface of the cover plate 200 facing the bottom case 100 (ie Figure 5 There is a gap g between the left side surface of the cover plate 200 shown in FIG. 1 and the guide member 120. In other words, Figure 4 and Figure 5 For example, the air entering from the opening a1 and the second air inlet 210 will be cut into two parts by the guide member 120, one part will be guided to the first air inlet 110 by the guide member 120, and the other part will enter the vicinity of another guide member 120 located above from the gap g and will be cut into two parts by the other guide member 120. In this way, the airflow can also flow through the gap g, further distributing the flow direction of the airflow, thereby achieving the purpose of noise reduction.

[0064] In some embodiments, please refer to Figure 2 and Figure 4 , the flow guide 120 includes a louver. In this way, flow can be guided by the louver structure.

[0065] In some embodiments, please refer to Figure 2, the second air inlet 210 is formed with a plurality of second air inlet holes arranged in an array. In this way, by providing the second air inlet holes with a regular arrangement, the intake air flow can be more uniformly forced to distribute, making the air flow direction stable and preventing the local aggregation of the air flow to form eddies. Specifically, in some embodiments, the second air inlet holes include circular holes, square holes, oval holes, waist-shaped holes, triangular holes or pentagonal holes. In this way, by designing the shapes of the second air inlet holes, the intake air flow can be distributed more uniformly.

[0066] It should be noted that all of the plurality of second air inlet holes may be of the shape of a certain one of the above, or may be a combination of at least two of them. The sizes of the plurality of second air inlet holes may be the same, may not be the same, or may not be completely the same. The embodiments of the present application do not make specific limitations thereto. As an implementation manner, taking Figure 2 as an example, the situation where all of the plurality of second air inlet holes are circular holes and the sizes of the plurality of second air inlet holes are the same is shown. In this way, the intake air can be uniformly and forcibly distributed through the circular intake air holes arranged in an array and having the same size, making the air flow direction more stable.

[0067] Since the intake air volume is controlled by the second air inlet 210, in some embodiments, the air inlet area of the first air inlet 110 is W1, the air inlet area of the second air inlet 210 is W2, and the air inlet area of the opening a1 is W3. Among them, W1≥W2 + W3. That is to say, the total air inlet area of the air inlet from the second air inlet 210 and the opening a1 is not greater than the air inlet area of the air inlet from the first air inlet. In this way, the intake air volume required for combustion can be ensured, so that the intake air of the second air inlet 210 and the opening a1 can enter the first air inlet 110 more completely.

[0068] In some embodiments, within a unit time, the air volume passing through the second air inlet 210 is Q1, the air volume passing through the opening a1 is Q2, and the theoretically required intake air volume during the maximum load combustion of the gas water heater is Q3. Among them, (Q1 + Q2) / Q3 = 1.1 - 1.35. That is to say, the ratio of the total air volume passing through the second air inlet 210 and the opening a1 to the theoretically required intake air volume during the maximum load combustion of the gas water heater is 1.1 - 1.35. Since the intake air volume required by the gas water heater is greater than the theoretically required intake air volume during the maximum load combustion of the gas water heater, in this way, the intake air volume required for combustion can be ensured.

[0069] It is found through research that the higher the temperature, the faster the propagation speed of sound waves. When the heat generated inside the combustion radiates to the surroundings, the temperature of the back of the bottom shell 100 and the air around the combustion chamber is significantly higher than the outdoor temperature, which is more conducive to the propagation of noise. In addition, the bottom shell 100 is generally processed with materials having a thickness of 0.8 mm or thinner, and its own thickness is comparable to that of other cooperating sheet metal parts. When noise is transmitted, due to the relatively poor overall stiffness of the bottom shell 100, it is more easily excited by sound waves to generate resonance, and the resonance will increase the noise.

[0070] In some embodiments, please continue to refer to Figures 2 to 4 , the gas water heater housing further includes a partition plate 300. The partition plate 300 is located on the outlet side of the first air inlet 110 (i.e., Figures 2 to 4 the front side of the bottom shell 100 shown), and the orthographic projection of the partition plate 300 on the bottom shell 100 covers the first air inlet 110. The partition plate 300 and the bottom shell 100 enclose and define a second cavity b, and the partition plate 300 is provided with a third air inlet 310 communicating with the second cavity b. Among them, a tortuous second air inlet passage is formed between the first air inlet 110 and the third air inlet 310.

[0071] Since there is a burner constantly burning inside the bottom shell 100, the radiant heat generated will be transferred outside the bottom shell 100, and the gas in the second cavity b enters from the cold air outside the bottom shell 100 into the first cavity a and then into the second cavity b. At this time, the gas flowing cyclically from the outside to the inside of the bottom shell 100 can play a role in reducing the temperature of the entire back of the bottom shell 100. The density of the low-temperature air can effectively block the energy of sound waves, making the propagation speed of sound waves slower, and can play a certain role in reducing noise. In this way, by setting the tortuous second air inlet passage, the propagation path of sound waves is extended, effectively reducing noise. At the same time, an air layer can be formed in the second cavity b, which plays a role in attenuating the transverse wave of sound waves, and thus can play a role in attenuating the transmission of noise.

[0072] It should be noted that the "orthographic projection of the partition plate 300 on the bottom shell 100" refers to that the parallel projection rays of the projection of the partition plate 300 are perpendicular to the plane where the bottom shell 100 is located. Taking Figure 3 as an example, the direction of the parallel projection rays is from back to front. That is to say, in this direction, the partition plate 300 is arranged relative to the first air inlet 110. The "partition plate 300 and the bottom shell 100 enclose and define a second cavity b" means that at least one of the partition plate 300 and the bottom shell 100 has a part recessed in a direction away from the other, as long as the second cavity b can be formed, and the embodiments of the present application do not make specific limitations in this regard. As an implementation manner, taking Figure 2 as an example, Figure 2 shows that the bottom shell 100 has a direction away from the partition plate 300 (i.e., Figure 2a portion that is recessed in the rearward direction shown in the figure), the upper, lower, left, and right ends of the partition 300 all have flanges, and the partition 300 can be detachably connected to the back surface of the bottom case 100 by means of these flanges. In this way, the partition 300 and the bottom case 100 enclose and define the second cavity b, and at the same time, the stiffness of the bottom case 100 can also be enhanced. Continuing with Figure 2 and Figure 3 as an example, "the first air inlet 110 and the third air inlet 310 form a tortuous second air inlet passage" means that in the up and down direction, the height of the first air inlet 110 and the height of the third air inlet 310 are different, Figure 2 and Figure 3 illustrate the case where the height of the first air inlet 110 is lower than the height of the third air inlet 310. In this way, a bent second air inlet passage can be formed, lengthening the length of the second air inlet passage.

[0073] In some embodiments, in order to make the air flow more regularly to reduce noise, the third air inlet 310 can also form a plurality of third air inlet holes arranged in an array, and a flow guiding device can also be correspondingly arranged on the side of the third air inlet hole facing the bottom case 100. For specific reference, please refer to the content in the foregoing some embodiments, and details will not be elaborated here.

[0074] In some embodiments, please continue to refer to Figure 2 and Figure 3 , the orthographic projection area of the partition 300 on the bottom case 100 is S1, and the area of the side of the bottom case 100 facing the partition 300 is S2. Among them, the ratio of S1 to S2 is 0.5 - 0.8. That is to say, from Figure 2 and Figure 3 it can be seen that the partition 300 basically covers the front side of the bottom case 100, playing a role in strengthening the stiffness of the bottom case 100. Since the stiffness of the bottom case 100 is enhanced, that is, the natural frequency of the entire bottom case 100 is changed, making the natural frequency of the bottom case 100 increase. When the combustion water heater is working, various vibrations thereof are not easily excited on the bottom case 100, and it is not easy to generate resonance, thereby reducing the vibration source generated by noise, and achieving noise reduction. In this way, the partition 300 realizes a better cooling effect on the bottom case 100 and an isolation of noise.

[0075] In some embodiments, please continue to refer to Figure 2 and Figure 3, the gas water heater housing further includes two side plates 400 connecting the left and right ends of the bottom shell 100, an upper baffle 500 connecting the upper end of the bottom shell 100, and a lower baffle 600 connecting the lower end of the bottom shell 100. The two side plates 400, the upper baffle 500, and the lower baffle 600 are all located on the front side of the bottom shell 100. Thus, a space for placing relevant components in the gas water heater can be enclosed. Inside this space, the inner partition 300 divides it into two chambers. One of the chambers is the second chamber, which can be used as a chamber for gas flow to cool the back of the bottom shell 100 and isolate noise. The other chamber is the main chamber, and the main chamber is used to install the burner, heat exchanger, fan assembly, and other components.

[0076] Based on the same inventive concept, the embodiment of the present application further provides a gas water heater, including the gas water heater housing in the above embodiment. In this way, by using this gas water heater housing, the noise generated when using the gas water heater can be reduced.

[0077] In summary, the embodiment of the present application provides a gas water heater housing. Air enters the first cavity a formed between the cover plate 200 and the bottom case 100 from two directions, namely, the second air inlet 210 on the cover plate 200 and the opening a1 formed between the cover plate 200 and the bottom case 100, and then enters the second cavity b formed between the partition plate 300 and the bottom case 100 through the first air inlet 110 on the bottom case 100, and then enters the main chamber through the third air inlet 310 on the partition plate 300. During this process, the path of the gas flow is strengthened. The noise generated by combustion in the main chamber needs to be transmitted outward and pass through the partition plate 300, the second cavity b formed between the partition plate 300 and the bottom case 100, and the bottom case 100 (a part of the noise also needs to pass through the first cavity formed between the bottom case 100 and the cover plate 200 and the cover plate 200) in sequence before reaching the human ear. After the noise passes through these several medium layers, when passing through the first cavity and the second cavity, the shear waves of the noise sound waves can be filtered, achieving the purpose of reducing noise. At the same time, when air enters the first cavity a formed between the cover plate 200 and the bottom case 100 from two directions, namely, the second air inlet 210 on the cover plate 200 and the opening a1 formed between the cover plate 200 and the bottom case 100, the matrix circular second air holes on the cover plate 200 uniformly and forcibly distribute the incoming air, making the air flow direction stable and preventing the formation of vortex air flow due to local aggregation, thereby playing a role in preventing the formation of eddy currents in the first cavity a and achieving the purpose of effectively reducing noise. When air enters the second cavity b formed between the partition plate 300 and the bottom case 100 through the first air inlet 110 on the bottom case 100, since this air enters from the cold air outside the bottom case 100, the circulating cold air can reduce the temperature of the entire back of the bottom case 100, and then slow down the propagation speed of the sound wave. In addition, flow guiding members 120 are provided at both the first air inlet 110 and the third air inlet 310, which can make the air flow direction more directional. In this way, the regularly flowing air is not likely to generate eddy currents. Thus, through the above process, the purpose of noise reduction can be achieved.

[0078] The technical features of the above embodiments can be combined arbitrarily. For the sake of brief description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0079] The above-described embodiments merely represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A gas water heater housing, characterized in that, it includes: a bottom shell (100) provided with a first air inlet (110) thereon; and a cover plate (200) located on the air inlet side of the first air inlet (110), and the orthographic projection of the cover plate (200) on the bottom shell (100) covers the first air inlet (110); wherein, the cover plate (200) and the bottom shell (100) enclose and define a first cavity (a) having an opening (a1), one end of the cover plate (200) and the bottom shell (100) enclose to form the opening (a1), and a second air inlet (210) communicating with the first cavity (a) is provided on the side of the cover plate (200) facing the bottom shell (100), so as to form a first air inlet passage through which fluid can enter the first air inlet (110) from the opening (a1) along a first direction (y) and from the second air inlet (210) along a second direction (x); the first direction (y) and the second direction (x) are arranged at an angle; a flow guide member (120) is provided on the bottom shell (100) at the first air inlet (110); the flow guide member (120) has a flow guide surface bent towards the opening (a1) for guiding the fluid to the first air inlet (110); along the second direction (x), there is a gap (g) between the surface of the cover plate (200) facing the bottom shell (100) and the flow guide member (120); the flow guide member (120) includes a shutter, and the second air inlet (210) is formed with a plurality of second air inlet holes arranged in an array.

2. The gas water heater housing according to claim 1, characterized in that, the first direction (y) is perpendicular to the second direction (x).

3. The gas water heater housing according to claim 1, characterized in that, the first air inlet (110) is formed with a plurality of first air inlet holes, and a plurality of the flow guide members (120) are provided; the plurality of flow guide members (120) correspond to the plurality of first air inlet holes one by one.

4. The gas water heater housing according to claim 3, characterized in that, the plurality of first air inlet holes are arranged in an array, and the plurality of flow guide members (120) are arranged in an array.

5. The gas water heater housing according to claim 1, characterized in that, the second air inlet holes include circular holes, square holes, oval holes, waist-shaped holes, triangular holes or pentagonal holes.

6. The gas water heater housing according to any one of claims 1-5, characterized in that, the air inlet area of the first air inlet (110) is W1, the air inlet area of the second air inlet (210) is W2, and the air inlet area of the opening (a1) is W3; wherein, W1≥W2+W3.

7. The gas water heater housing according to any one of claims 1-5, characterized in that, in unit time, the air volume passing through the second air inlet (210) is Q1, the air volume passing through the opening (a1) is Q2, and the theoretically required air inlet volume during the maximum load combustion of the gas water heater is Q3; Among them, (Q1 + Q2) / Q3 = 1.1 - 1.

35.

8. The gas water heater housing according to any one of claims 1-5, characterized in that the gas water heater housing further includes a partition plate (300); the partition plate (300) is located on the outlet side of the first air inlet (110), and the orthographic projection of the partition plate (300) on the bottom case (100) covers the first air inlet (110); the partition plate (300) and the bottom case (100) enclose and define a second cavity (b), and a third air inlet (310) communicating with the second cavity (b) is provided on the partition plate (300); wherein, a tortuous second air inlet passage is formed between the first air inlet (110) and the third air inlet (310).

9. The gas water heater housing according to claim 8, characterized in that the orthographic projection area of the partition plate (300) on the bottom case (100) is S1, and the area of the side of the bottom case (100) facing the partition plate (300) is S2; wherein, the ratio of S1 to S2 is 0.5 - 0.

8.

10. A gas water heater, characterized in that it includes the gas water heater housing according to any one of claims 1-9.

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