Gas mixers and gas equipment

Abstract

This invention discloses a gas mixer and a gas equipment. The gas mixer includes: a housing defining a gas flow channel, the gas flow channel being divided into independent gas flow channels and air flow channels, the outlets of the gas flow channels and the air flow channels being connected; and a valve disposed within the gas flow channel for selectively cutting off a portion of the gas flow channel and / or the air flow channel. According to the gas mixer of this invention, by selectively cutting off a portion of the gas flow channel and / or the air flow channel through the valve within the gas flow channel, the amount of air and gas entering the gas flow channel is controlled, thereby obtaining a better air-fuel ratio and meeting the different load requirements of the gas equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water heaters, and more particularly to a gas mixer and a gas device. BACKGROUND

[0002] The gas mixer in the related art cannot effectively regulate the gas and air, the combustion regulation ratio is small, and the gas device cannot meet different load requirements. SUMMARY

[0003] The present application aims to at least partially solve one of the above technical problems.

[0004] To this end, the present application provides a gas mixer, which has a good air-fuel ratio and strong versatility.

[0005] The present application also provides a gas device with the above gas mixer, which has high combustion efficiency.

[0006] According to the gas mixer of the present application, a housing defines a gas flow channel, the gas flow channel is divided into independent gas flow channels and air flow channels, the outlets of the gas flow channels and the air flow channels are communicated, and a valve is arranged in the gas flow channel to selectively cut off a part of the gas flow channels and / or the air flow channels.

[0007] According to the gas mixer of the present application, a valve in the gas flow channel selectively cuts off a part of the gas flow channels and / or the air flow channels, so as to control the amount of air and gas entering the gas flow channel, obtain a better air-fuel ratio, and meet different load requirements of the gas device.

[0008] According to some embodiments of the present application, the gas flow channels are divided into normally closed gas flow channels and normally open gas flow channels, and / or the air flow channels are divided into normally closed air flow channels and normally open air flow channels.

[0009] In an optional embodiment, the gas flow channel is provided with a first annular structure and a second annular structure, the first annular structure defines the normally closed gas flow channels and the normally closed air flow channels, and the second annular structure defines the normally open gas flow channels and the normally open air flow channels.

[0010] In an optional embodiment, the valve is rotatable relative to the first annular structure by wind power, and the rotation range is between 0-90°.

[0011] In a further optional embodiment, the end surface of the second annular structure exceeds the end surface of the first annular structure.

[0012] In a further optional embodiment, the end surface of the first annular structure is inclined from inside to outside.

[0013] In an optional embodiment, the first annular structure comprises a first annular cylinder and a first pipe column arranged in the first annular cylinder, the inner wall of the first annular cylinder and the outer wall of the first pipe column define a normally closed air flow channel, and the first pipe column defines a normally closed gas flow channel; and the second annular structure comprises a second annular cylinder and a second pipe column arranged in the second annular cylinder, the inner wall of the second annular cylinder and the outer wall of the second pipe column define a normally open air flow channel, and the second pipe column defines a normally open gas flow channel.

[0014] In some embodiments of the present application, the housing comprises an upper shell and a lower shell, the upper shell defines a mounting cavity and is provided with a gas supply passage and an air supply passage, wherein the gas supply passage has a gas inlet, and the air supply passage has an air inlet, and the lower shell is embedded in the mounting cavity and defines a normally closed gas flow channel, a normally open gas flow channel, a normally closed air flow channel and a normally open air flow channel.

[0015] In an optional embodiment, the central axes of the upper shell and the lower shell coincide.

[0016] In a further optional embodiment, the upper shell comprises a first plate body and a second plate body, the first plate body and the second plate body at least partially coincide in the horizontal direction, and the coincident part forms the air inlet communicated with the mounting cavity.

[0017] In a further optional embodiment, the upper shell is provided with a communication pipe, and the communication pipe is configured to form the gas supply passage.

[0018] In some embodiments of the present application, the downstream section of the gas flow channel is provided with a lateral air inlet communicated with the outlets of the gas flow channel and the air flow channel.

[0019] In a further optional embodiment, the lateral air inlet is provided with a sliding door for adjusting the opening size of the lateral air inlet.

[0020] In an optional example, the outer wall of the sliding door is provided with a raised rib.

[0021] The gas equipment according to the embodiments of the present application comprises the gas mixer of the above-mentioned embodiments, and since the gas mixer according to the embodiments of the present application can obtain a better air-fuel ratio and has strong versatility, the combustion efficiency of the gas equipment according to the embodiments of the present application is high.

[0022] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0023] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood by considering the following detailed description, including the accompanying drawings, in which:

[0024] Figure 1 is a structural diagram of a gas mixer according to some embodiments of the present application;

[0025] Figure 2 is a structural diagram of a gas mixer according to some embodiments of the present application;

[0026] Figure 3 is a structural diagram of a gas mixer according to some embodiments of the present application;

[0027] Figure 4 is a structural diagram of a gas mixer according to some embodiments of the present application;

[0028] Figure 5 is a structural diagram of a gas mixer according to some embodiments of the present application;

[0029] Figure 6 is Figure 5 is a sectional view along line A-A;

[0030] Figure 7 is a top view of an upper shell according to some embodiments of the present application;

[0031] Figure 8 is a bottom view of an upper shell according to some embodiments of the present application;

[0032] Figure 9 is a structural diagram of a lower shell according to some embodiments of the present application;

[0033] Figure 10 is a structural diagram of a lower shell according to some embodiments of the present application;

[0034] Figure 11 is a structural diagram of a lower shell according to some embodiments of the present application;

[0035] Figure 12 is a structural diagram of a lower shell according to some embodiments of the present application;

[0036] Figure 13 is a structural diagram of a lower shell according to some embodiments of the present application.

[0037] Reference signs:

[0038] a gas mixer 100;

[0039] a housing 10;

[0040] Gas flow channel 11; fuel flow channel 111; normally closed fuel flow channel 1111; normally open fuel flow channel 1112; air flow channel 112; normally closed air flow channel 1121; normally open air flow channel 1122;

[0041] First annular structure 12; First annular cylinder 121; First tubular column 122;

[0042] Second annular structure 13; Second annular cylinder 131; Second tubular column 132;

[0043] Valve 20;

[0044] Upper shell 31; gas supply channel 311; air supply channel 312; first plate 313; second plate 314; gas inlet 315; air inlet 316; connecting pipe 317;

[0045] Lower shell 32; side air inlet 33;

[0046] Sliding door 34; raised rib 341. Detailed Implementation

[0047] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0048] The following reference Figures 1-13 The present invention describes a gas mixer 100, in which air and gas are premixed before entering a gas appliance. The outlet of the gas mixer 100 can be connected to the inlet of a fan. The air-gas mixture (a mixture of gas and air) produced by the gas mixer 100 is drawn into the fan's air chamber by the fan, where it mixes further before being sent to the combustion chamber for combustion.

[0049] like Figures 1-6 As shown, the gas mixer 100 includes a housing 10 and a valve 20. The housing 10 defines a gas flow path 11, which is divided into a separate gas flow path 111 and an air flow path 112, with the outlets of the gas flow path 111 and the air flow path 112 connected. That is, air and gas enter the gas flow path 11 through the relatively independent gas flow path 111 and air flow path 112, and converge and mix at the outlet to form an air-gas mixture.

[0050] Valve 20 is installed in the gas flow channel 11 to selectively cut off a portion of the gas flow channel 111 and / or the air flow channel. That is, valve 20 selectively prevents a portion of the gas from entering the gas flow channel 111; or selectively prevents a portion of the air from entering the air flow channel 112; or simultaneously selectively prevents a portion of the air and gas from entering the air flow channel 112 and the gas flow channel 111 respectively, thereby controlling the amount of air and gas entering the gas flow channel 11 to obtain a better air-fuel ratio and meet the different load requirements of the gas equipment.

[0051] It should be noted that "selectivity" means that under certain operating conditions (e.g., low load conditions), valve 20 prevents some gas and / or air from entering air passage 112 and gas passage 111, while some gas and air can enter air passage 112 and gas passage 111. In other words, part of gas passage 111 and / or air passage 112 is open and the other part is closed. Under certain operating conditions (e.g., high load conditions), valve 20 does not prevent gas and / or air from entering air passage 112 and gas passage 111. In other words, gas passage 111 and / or air passage are fully open.

[0052] In addition, the opening degree of valve 20 can be directly proportional to the speed of the fan. The higher the speed of the fan, the greater the wind force it generates, and the greater the opening degree of the valve is affected by the wind force.

[0053] Therefore, according to the gas mixer 100 of the present invention, a portion of the gas flow channel 111 and / or air flow channel 112 is selectively cut off by the valve 20 in the air flow channel 11, thereby controlling the amount of air and gas entering the gas flow channel 11, obtaining a better air-fuel ratio, and meeting the different load requirements of the gas equipment.

[0054] In some embodiments of the present invention, the gas flow channel 111 is divided into a normally closed gas flow channel 1111 and a normally open gas flow channel 1112, and / or the air flow channel 112 is divided into a normally closed air flow channel 1121 and a normally open air flow channel 1122. In other words, the gas flow channel 111 includes a normally closed gas flow channel 1111 and a normally open gas flow channel 1112, and the air flow channel 112 includes a normally closed air flow channel 1121 and a normally open air flow channel 1122. Thus, the valve 20 can control the amount of gas and air entering the gas flow channel 11 by adjusting the normally closed gas flow channel 1111 and / or the normally closed air flow channel 1121.

[0055] In optional embodiments, such as Figure 2 and Figure 3 Combination Figures 9-12As shown, the gas flow channel 11 is provided with a first annular structure 12 and a second annular structure 13. The first annular structure 12 defines a normally closed gas flow channel 1111 and a normally closed air flow channel 1121, and the second annular structure 13 defines a normally open gas flow channel 11121 and a normally open air flow channel 1122. That is, the normally closed flow channels (normally closed gas flow channel 1111 and normally closed air flow channel 1121) and the normally open flow channels (normally open gas flow channel 1112 and normally open air flow channel 1121) are separated by the first annular structure 12 and the second annular structure 13. In this way, the flow channel can be optimized structurally, and the flow channels can be grouped according to the usage state, making it easier for the valve 20 to adjust the opening degree of the normally closed gas flow channel 1111 and the normally closed air flow channel 1121.

[0056] In an optional example, valve 20 can rotate relative to the first annular structure 12 by wind force, with a rotation range between 0 and 90°. When the rotation angle of valve 20 is 0°, valve 20 closes the normally closed gas flow channel 1111 and the normally closed air flow channel 1121. When the wind force is small, valve 20 is slightly open, and the rotation angle of valve 20 can be a value between 0 and 90°, such as 20°. At this time, the normally closed gas flow channel 1111 and the normally closed air flow channel 1121 are slightly opened. When the wind force is large, valve 20 opens to a larger extent, and the rotation angle of valve 20 can be a value between 0 and 90°, such as 60°. At this time, the normally closed gas flow channel 1111 and the normally closed air flow channel 1121 are almost open. Only when the wind force is strong enough will valve 20 be fully opened, and the rotation angle of valve 20 will be 90°.

[0057] It should be noted that valve 20 is approximately parallel to the cross-section of airflow channel 11, making valve 20 more sensitive to wind force, and the rotation angle of valve 20 is positively correlated with wind force. Preferably, airflow channel 11 has axial air intake and axial air outlet, which facilitates better application of wind force to valve 20, better control of valve 20's opening and closing, and effective regulation of the intake volume of gas and air.

[0058] like Figure 6 As shown, the end face of the second annular structure 13 extends beyond the end face of the first annular structure 12. Thus, the portion of the second annular structure 13 extending beyond the first annular structure 12 restricts the valve 20 from rotating towards the second annular structure 13, thereby preventing the valve 20 from interfering with the airflow in the normally open gas flow channel 1112 and the normally open air flow channel 1122. This effectively regulates the intake volume of gas and air in the gas mixer 100, achieving a better air-fuel ratio.

[0059] For example Figure 6As shown, the end face of the first annular structure 12 is inclined from the inside out. When the wind force is sufficient to open the valve 20, the valve 20 moves away from the end face of the first annular structure 12. Since the end face of the first annular structure 12 is inclined, when there is no wind or very little wind, the valve 20 adheres to the end face of the first annular structure 12 by its own weight. Here, "inner" and "outer" are relative to the central axis of the housing 10; the side closer to the central axis of the housing 10 is the inner side, and the side farther from the central axis of the housing 10 is the outer side.

[0060] In one specific embodiment, such as Figures 9-12 As shown, the first annular structure 12 includes a first annular cylinder 121 and a first tubular column 122 disposed within the first annular cylinder 121. The inner wall of the first annular cylinder 121 and the outer wall of the first tubular column 122 define a normally closed air flow channel 1121, and the first tubular column 122 defines a normally closed gas flow channel 1111. The second annular structure 13 includes a second annular cylinder 131 and a second tubular column 132 disposed within the second annular cylinder 131. The inner wall of the second annular cylinder 131 and the outer wall of the second tubular column 132 define a normally open air flow channel 1122, and the second tubular column 132 defines a normally open gas flow channel 1112. That is, the normally closed gas flow channel 1111 and the normally closed air flow channel 1121 are separated by the first tubular column 122, and the normally open gas flow channel 1112 and the normally open air flow channel 1122 are separated by the second tubular column 132, thereby ensuring that the gas and air have relatively independent flow channels before premixing.

[0061] In other embodiments of the present invention, such as Figures 1-6 Combination Figures 7-13 The housing 10 includes an upper housing 31 and a lower housing 32. The upper housing 31 defines an installation cavity, a gas supply passage 311 with a gas inlet 315, and an air supply passage 312 with an air inlet 316. The lower housing 32 is embedded in the installation cavity and defines a normally closed gas flow channel 1111, a normally open gas flow channel 1112, a normally closed air flow channel 1121, and a normally open air flow channel 1122.

[0062] Gas is input through the gas inlet of the upper shell 31, and then delivered to the normally open gas flow channel 1112 and the normally closed gas flow channel 1111 via the gas supply channel 311. The number of gas supply channels 311 corresponds one-to-one with the number of normally open and normally closed gas flow channels 1112 and 1111. Air is also input through the air inlet 316 of the upper shell 31, and then delivered to the normally open and normally closed air flow channels 1122 and 1121 respectively. In other words, both gas and air can enter the shell 10 individually from a single main inlet, mix, and then exit from a single main mixed gas outlet. It should be noted that "upper shell 31" and "lower shell 32" are based on the schematic diagram in the attached drawings and do not limit the actual installation location of the gas mixer 100.

[0063] In addition, the upper shell 31 and the lower shell 32 can be reinforced by plugging, snapping or screw locking to improve the structural strength of the entire gas mixer 100 and prevent the gas mixer 100 from shaking or becoming loose during use.

[0064] Optionally, the central axes of the upper shell 31 and the lower shell 32 coincide. That is, air and gas enter from one axial end of the gas mixer 100, mix, and then flow out from the other axial end of the gas mixer 100.

[0065] Some optional examples, such as Figure 7 and Figure 8 As shown, the upper shell 31 includes a first plate 313 and a second plate 314. The first plate 313 and the second plate 314 at least partially overlap in the horizontal direction, and the overlapping portion is formed at the air inlet 316 communicating with the mounting cavity. In other words, the greater the overlap between the first plate 313 and the second plate 314, the larger the air inlet 316; the smaller the overlap between the first plate 313 and the second plate 314, the smaller the air inlet 316. Therefore, the overlap between the first plate 313 and the second plate 314 can be adjusted according to the gas equipment with different load requirements to obtain the optimal air-fuel ratio and improve the versatility of the overall structure of the gas mixer 100.

[0066] To facilitate connection between the gas mixer 100 and the gas supply pipeline, the upper shell 11 is provided with a connecting pipe 317, which forms a gas supply channel 311. This connecting pipe 317 can be connected to the gas supply pipeline, supplying gas to both the normally closed gas flow channel 1111 and the normally open gas flow channel 1112. To better regulate the gas intake, a gas valve can be installed at the inlet of the connecting pipe 317. This gas valve can adjust the intake volume according to the wind pressure, thereby further regulating the air-fuel ratio.

[0067] In other embodiments of the present invention, such as Figure 2 , Figure 4 , Figures 9-11 and Figure 13 As shown, the downstream section of the gas flow channel 11 is provided with a side air inlet 33 that connects to the outlet of the gas flow channel 111 and the air flow channel. After the gas and air are premixed, additional air can be supplied to the mixture again through the side air inlet 336. In this way, the air intake can be slightly reduced through the side air inlet 33 to obtain a more precise air-fuel ratio.

[0068] The number of side air inlets 33 may include multiple, for example, two, with the two side air inlets 33 symmetrically arranged with respect to the axial centerline of the housing 10. It is understood that the above is merely illustrative and not a limitation on the embodiments of the present invention. There may be multiple side air inlets 33 located in the same circumferential direction of the housing 10, or multiple side air inlets 33 spaced apart along the axial direction of the housing 10.

[0069] Optional examples, such as Figure 10 As shown, the side air inlet 33 is provided with a sliding door 34 for adjusting the opening size of the side air inlet 33. In this way, the opening size of the side air inlet 33 can be controlled by sliding the sliding door 34 to obtain different side air intake volumes.

[0070] In one specific embodiment, such as Figure 10 As shown, the outer wall of the sliding door 34 is provided with raised ribs 341. These raised ribs 341 can play an anti-slip role and facilitate the circumferential displacement of the sliding door 34.

[0071] The gas appliance according to the embodiments of the present invention includes the gas mixer 100 of the above embodiments. Since the gas mixer 100 according to the embodiments of the present invention can obtain a better air-fuel ratio and has strong versatility, the gas appliance according to the embodiments of the present invention has high combustion efficiency.

[0072] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0073] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention.

Claims

1. A gas mixer, characterized by The application relates to a gas valve, comprising: a housing defining a gas flow channel, the gas flow channel being divided into independent fuel gas flow channel and air flow channel, the outlets of the fuel gas flow channel and the air flow channel being communicated; a valve arranged in the gas flow channel for selectively cutting off a part of the fuel gas flow channel and the air flow channel; the fuel gas flow channel is divided into a normally closed fuel gas flow channel and a normally open fuel gas flow channel, and the air flow channel is divided into a normally closed air flow channel and a normally open air flow channel; the gas flow channel is provided with a first annular structure and a second annular structure, the first annular structure defines the normally closed fuel gas flow channel and the normally closed air flow channel, and the second annular structure defines the normally open fuel gas flow channel and the normally open air flow channel; the first annular structure comprises a first annular cylinder and a first pipe column arranged in the first annular cylinder, the inner wall of the first annular cylinder and the outer wall of the first pipe column define the normally closed air flow channel, and the first pipe column defines the normally closed fuel gas flow channel; the second annular structure comprises a second annular cylinder and a second pipe column arranged in the second annular cylinder, the inner wall of the second annular cylinder and the outer wall of the second pipe column define the normally open air flow channel, and the second pipe column defines the normally open fuel gas flow channel; the valve is rotatable relative to the first annular structure by wind power, and the rotation range is between 0-90 degrees.

2. The gas mixer of claim 1, wherein The end surface of the second annular structure exceeds the end surface of the first annular structure.

3. The gas mixer of claim 1, wherein The end surface of the first annular structure is inclined from inside to outside.

4. Gas mixer according to any one of claims 1-3, characterized in that The downstream section of the gas flow channel is provided with a lateral air inlet communicated with the outlets of the fuel gas flow channel and the air flow channel.

5. The gas mixer of claim 4, wherein The lateral air inlet is provided with a sliding door for adjusting the opening size of the lateral air inlet.

6. The gas mixer of claim 5, wherein The outer wall of the sliding door is provided with a convex rib.

7. A gas mixer characterized by, The application relates to a gas valve, comprising: a housing defining a gas flow channel, the gas flow channel being divided into independent fuel gas flow channel and air flow channel, the outlets of the fuel gas flow channel and the air flow channel being communicated; a valve arranged in the gas flow channel for selectively cutting off a part of the fuel gas flow channel and the air flow channel; the fuel gas flow channel is divided into a normally closed fuel gas flow channel and a normally open fuel gas flow channel, and the air flow channel is divided into a normally closed air flow channel and a normally open air flow channel; the gas flow channel is provided with a first annular structure and a second annular structure, the first annular structure defines the normally closed fuel gas flow channel and the normally closed air flow channel, and the second annular structure defines the normally open fuel gas flow channel and the normally open air flow channel; the first annular structure comprises a first annular cylinder and a first pipe column arranged in the first annular cylinder, the inner wall of the first annular cylinder and the outer wall of the first pipe column define the normally closed air flow channel, and the first pipe column defines the normally closed fuel gas flow channel; the second annular structure comprises a second annular cylinder and a second pipe column arranged in the second annular cylinder, the inner wall of the second annular cylinder and the outer wall of the second pipe column define the normally open air flow channel, and the second pipe column defines the normally open fuel gas flow channel; The shell comprises an upper shell and a lower shell, the upper shell defines a mounting cavity and is provided with a gas supply passage and an air supply passage, wherein the gas supply passage is provided with a gas inlet, the air supply passage is provided with an air inlet, and the lower shell is embedded in the mounting cavity and defines a normally closed gas flow channel, a normally open gas flow channel, a normally closed air flow channel and a normally open air flow channel.

8. The gas mixer of claim 7, wherein The central axes of the upper shell and the lower shell coincide.

9. The gas mixer of claim 7, wherein The upper shell comprises a first plate body and a second plate body, the first plate body and the second plate body at least partially coincide in horizontal projection, and the coincident part is formed at the air inlet communicated with the mounting cavity.

10. The gas mixer of claim 9, wherein The upper shell is provided with a communication pipe, and the communication pipe is configured to form the gas supply passage.

11. Gas mixer according to any of claims 7-10, characterized in that A downstream section of the gas flow channel is provided with a lateral air inlet communicated with the outlets of the gas flow channel and the air flow channel.

12. The gas mixer of claim 11, wherein, The lateral air inlet is provided with a sliding door for adjusting the opening size of the lateral air inlet.

13. The gas mixer of claim 12, wherein, An outer wall of the sliding door is provided with a raised rib.

14. A gas appliance characterised in that, A gas mixer comprising any one of claims 1-13.

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