Gas premixing device and gas water heater with same

Abstract

The embodiment of the present application provides a kind of gas premixing device and gas water heater with it, wherein, gas premixing device includes: gas joint, including mixed section and gas section, the inside of mixed section is defined with mixing chamber, and the both ends of mixing chamber are provided with air inlet and mixed gas outlet respectively, and gas section is formed by the wall body of mixed section and extends outward, and the inside of gas section is defined with gas cavity, and the first end in the axial direction of gas cavity is communicated with mixing chamber to form gas through hole;Gas delivery pipe, the gas outlet end of gas delivery pipe is communicated with the second end in the axial direction of gas cavity;Gas pressure regulating part, the gas inlet end of gas delivery pipe is communicated with the gas outlet end of gas pressure regulating part, and gas pressure regulating part is used to adjust the gas pressure of gas entering gas delivery pipe.The gas premixing device of the embodiment of the present application has the advantages of simple structure, easy processing, good gas and air mixing effect and the like by adopting the above technical scheme.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric appliance manufacturing, and in particular to a gas premixing device and a gas water heater with the same. BACKGROUND

[0002] A gas adjusting device is provided in the related art, which is installed at an air inlet of a fan and used to deliver gas to the fan and adjust the flow of the gas. However, since the fan will form an air negative pressure at the air inlet in the instant of starting, the sensitivity of the valve body of the gas adjusting device is affected, and thus the gas adjusting device has defects such as poor stability and low flow regulation accuracy. SUMMARY

[0003] Embodiments of the present application provide a gas premixing device and a gas water heater with the same to solve or alleviate one or more technical problems in the prior art.

[0004] In a first aspect, embodiments of the present application provide a gas premixing device, comprising:

[0005] A gas mixing connector, comprising a mixing section and a gas section, the mixing section defines a mixing cavity inside, the mixing cavity has an air inlet and a mixed gas outlet at two ends respectively, the gas section is formed by extending outward from the wall of the mixing section, the gas section defines a gas cavity inside, and a first end in the axial direction of the gas cavity is communicated with the mixing cavity to form a gas through hole;

[0006] A gas delivery pipe, the gas delivery pipe has a gas outlet end communicated with a second end in the axial direction of the gas cavity;

[0007] A gas pressure adjusting part, the gas outlet end of the gas pressure adjusting part is communicated with the gas inlet end of the gas delivery pipe, and the gas pressure adjusting part is used to adjust the gas pressure of the gas entering the gas delivery pipe.

[0008] In an implementation manner, the gas delivery pipe is coaxially arranged with the gas cavity, and the gas outlet end of the gas delivery pipe is arranged opposite to the gas through hole.

[0009] In an implementation manner, the gas pressure adjusting part comprises:

[0010] An adjusting connector, the adjusting connector defines an adjusting cavity and a gas delivery cavity formed by extending from the adjusting cavity, the adjusting cavity is formed with a gas outlet, the gas outlet is communicated with the gas inlet end of the gas delivery pipe, and the communication part of the adjusting cavity and the gas delivery cavity forms an air hole;

[0011] A on-off valve, installed in the gas delivery cavity, the on-off valve has an open state and a closed state, the on-off valve avoids the air hole in the open state, and the on-off valve at least blocks part of the air hole in the closed state;

[0012] A controller is in communication with the on-off valve to control the on-off valve to switch between the open state and the closed state.

[0013] In one embodiment, the gas hole includes a first gas hole and a second gas hole, the first gas hole is spaced apart from the second gas hole, the on-off valve avoids the first gas hole when the on-off valve is in the open state, and the on-off valve blocks the first gas hole when the on-off valve is in the closed state.

[0014] In one embodiment, the gas mixing connector further includes a sleeve, the sleeve extends at least partially into the mixing chamber, wherein an inner peripheral wall of the sleeve defines the air flow channel, and an outer peripheral wall of the sleeve located in the mixing chamber is spaced apart from the inner wall of the mixing chamber to define the gas flow channel.

[0015] In one embodiment, a first end of the sleeve is mounted at the air inlet and abuts against the inner wall of the air inlet, and a second end of the sleeve extends into the mixing chamber, and the outer peripheral wall of the sleeve is spaced apart from the gas through hole.

[0016] In one embodiment, the first end of the sleeve has a positioning ring platform, and the air inlet has a positioning ring groove matched with the positioning ring platform.

[0017] In one embodiment, in the axial direction of the mixing chamber, the second end of the sleeve is located between the gas through hole and the mixed gas outlet.

[0018] In one embodiment, the extension direction of the gas chamber is the radial direction of the mixing chamber.

[0019] In one embodiment, the second end of the gas section is provided with a connecting bayonet for connecting the gas outlet end of the gas delivery pipe.

[0020] In one embodiment, the gas premixing device further includes:

[0021] A proportional valve connected to the air inlet end of the gas pressure adjusting part, the proportional valve being provided with the gas inlet connector of the gas premixing device.

[0022] In a second aspect, the embodiments of the present application provide a gas water heater, which includes the gas premixing device according to the embodiments of the present application.

[0023] In one embodiment, the gas water heater further includes:

[0024] A housing;

[0025] A fan assembly provided in the housing, and the gas premixing device is mounted on the fan assembly.

[0026] A detection device for detecting the outlet water temperature, the detection device being provided in the housing.

[0027] In one embodiment, the fan assembly includes:

[0028] A housing;

[0029] The cover plate and the cabinet define a containing cavity, the cover plate is provided with an air inlet, and the air mixing connector is installed at the air inlet.

[0030] The fan is arranged in the containing cavity.

[0031] The gas premixing device has the advantages of high stability and precise gas pressure adjustment.

[0032] The above summary is only for the purpose of the description and is not intended to limit in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features will be readily apparent to those skilled in the art by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0033] In the drawings, like numerals refer to like elements throughout the various drawings. The drawings are not necessarily to scale, the emphasis instead being placed upon illustrating the principles of the application. It should be understood that the drawings are merely depictions of some embodiments of the application and should not be construed as limiting the scope of the application.

[0034] Figure 1 A structural schematic diagram of a gas premixing device according to an embodiment of the application is shown;

[0035] Figure 2 An exploded view of an air mixing connector of a gas premixing device according to an embodiment of the application is shown;

[0036] Figure 3 A partial structural sectional view of an air mixing connector of a gas premixing device according to an embodiment of the application is shown;

[0037] Figure 4 A structural schematic diagram of a gas delivery pipe of an air mixing connector of a gas premixing device according to an embodiment of the application is shown;

[0038] Figure 5 A structural schematic diagram of a gas pressure adjusting part and a gas delivery pipe of a gas premixing device according to an embodiment of the application is shown;

[0039] Figure 6 A partial sectional view of a gas pressure adjusting part and a gas delivery pipe of a gas premixing device according to an embodiment of the application is shown;

[0040] Figure 7 A partial structural schematic diagram of a gas pressure adjusting part and a gas delivery pipe of a gas premixing device according to an embodiment of the application is shown;

[0041] Figure 8Fig. 2 shows a partial sectional view of a gas pressure regulating portion and a gas delivery pipe of a gas premixing device according to an embodiment of the present application;

[0042] Figure 9 Fig. 2 shows a partial sectional view of a gas pressure regulating portion and a gas delivery pipe of a gas premixing device according to an embodiment of the present application;

[0043] Figure 10 Fig. 2 shows a partial sectional view of a gas pressure regulating portion and a gas delivery pipe of a gas premixing device according to an embodiment of the present application;

[0044] BRIEF DESCRIPTION OF DRAWINGS

[0045] A gas premixing device 1 ;

[0046] A gas premixing device 1 ;

[0047] A gas premixing device 1 ;

[0048] A gas premixing device 1 ;

[0049] A gas premixing device 1 ;

[0050] A gas premixing device 1 ;

[0051] A gas premixing device 1 ; DETAILED DESCRIPTION

[0052] In the following, only certain example embodiments are simply described. As those skilled in the art will recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present application. Therefore, the drawings and description are to be regarded as illustrative in nature and not as restrictive.

[0053] Reference is made below to Figures 1-10 A gas premixing device 1 according to an embodiment of the present application is described. The gas premixing device 1 of the present embodiment can be used in a gas water heater to preliminarily mix gas and air before entering a fan assembly 2.

[0054] As Figures 1-3As shown, the gas premixing device 1 according to the embodiment of the present application comprises a mixing joint 100, a gas delivery pipe 250 and a gas pressure adjusting part.

[0055] Specifically, the mixing joint 100 comprises a mixing section 110 and a gas section 120, the mixing section 110 defines a mixing cavity 110a inside, the mixing cavity 110a has an air inlet 111 and a mixed gas outlet 112 at two ends respectively. The gas section 120 is formed by extending outwardly from the wall of the mixing section 110, the gas section 120 defines a gas cavity 120a inside, the first end of the gas cavity 120a in the axial direction is communicated with the mixing cavity 110a to form a gas through hole 113, the gas cavity 120a and the mixing cavity 110a are communicated through the gas through hole 113, so that the gas in the gas cavity 120a can enter the mixing cavity 110a through the gas through hole 113 to mix with the air. It can be understood that the gas section 120 and the mixing section 110 can be an integrated structure, wherein the gas section 120 is used to connect the gas delivery pipe 250 to deliver gas to the mixing cavity 110a. The gas outlet end of the gas delivery pipe 250 is communicated with the second end of the gas cavity 120a in the axial direction, the gas outlet end of the gas pressure adjusting part is communicated with the gas inlet end of the gas delivery pipe 250, and the gas pressure adjusting part is used to adjust the gas pressure of the gas entering the gas delivery pipe 250.

[0056] In an embodiment, as shown in Figure 2 and Figure 3 The mixing joint 100 further comprises a sleeve 130. Specifically, part of the sleeve 130 extends into the mixing cavity 110a from the air inlet 111, wherein the inner peripheral wall of the sleeve 130 defines an air flow channel 130a, so that the air can enter the mixing cavity 110a through the air flow channel 130a; the outer peripheral wall of the part of the sleeve 130 located in the mixing cavity 110a is spaced apart from the inner wall of the mixing cavity 110a to define a gas flow channel 130b, so that the gas enters the mixing cavity 110a through the gas flow channel 130b.

[0057] In one example, the sleeve 130 has a first end 131 and a second end 132 in the extending direction of the sleeve 130, the first end 131 of the sleeve 130 is mounted at the air inlet 111 and tightly abuts the inner wall of the air inlet 111, and the second end 132 of the sleeve 130 extends into the mixing cavity 110a, and the outer peripheral wall of the sleeve 130 is spaced apart from the gas passage hole 113. In this way, not only can the sleeve 130 be used to guide the air and the gas respectively, facilitate the air and the gas to form the mixed gas in the mixing cavity 110a, and the mixed gas can flow out of the mixed gas outlet 112 smoothly, but also the sleeve 130 can avoid blocking the gas passage hole 113, so that the gas can enter the mixing cavity 110a through the gas passage hole 113 smoothly, thereby avoiding the sleeve 130 affecting the normal flow of the gas. Furthermore, by tightly abutting the first end 131 of the sleeve 130 with the inner wall of the air inlet 111, the leakage of the gas through the gap between the sleeve 130 and the inner wall of the air inlet 111 can be avoided, thereby sealing the gas flow channel 130b.

[0058] It should be noted that in the embodiments of the present application, the sleeve 130 and the mixing section 110 can be an integrated structure or a split structure. Preferably, the sleeve 130 and the mixing section 110 can adopt a split structure for easy processing.

[0059] According to the gas premixing device 1 of the embodiments of the present application, by extending part of the sleeve 130 from the air inlet 111 into the mixing cavity 110a, the air and the gas can be guided in the mixing cavity 110a, the air inlet 111 and the mixed gas outlet 112 are easy to process, the air and the gas can form the mixed gas in the mixing cavity 110a, and the mixed gas of the air and the gas can flow out of the mixed gas outlet 112, thereby further improving the working performance of the gas premixing device 1. Therefore, the gas premixing device 1 according to the embodiments of the present application has the advantages of simple structure, easy processing, good mixing effect of the gas and the air, etc.

[0060] Furthermore, since the gas mixing connector 100 is mounted at the air inlet of the fan assembly 2, by arranging the gas delivery pipe 250 between the gas pressure adjusting part and the gas mixing connector 100, the gas can be delivered to the gas cavity 120a through the gas delivery pipe 250 after being adjusted in pressure by the gas pressure adjusting part. In this way, the gas pressure adjusting part can be arranged away from the air inlet of the fan assembly 2, and at the moment when the fan assembly 2 starts, the air negative pressure generated at the air inlet of the fan assembly 2 can avoid affecting the sensitivity of the valve body (such as the on-off valve 300) of the gas pressure adjusting part, thereby solving the technical problem of the valve body failure of the gas premixing device in the related art when the fan starts. Therefore, the stability of the valve body of the gas pressure adjusting part can be ensured, thereby ensuring that the gas pressure adjusting part can accurately adjust the gas pressure. Therefore, the gas premixing device 1 according to the embodiments of the present application also has the advantages of high stability and accurate gas pressure adjustment.

[0061] In one implementation, such as Figure 3 As shown, the gas delivery pipe 250 and the gas chamber 120a are coaxially arranged, and the outlet end of the gas delivery pipe 250 is directly opposite the gas through hole 113. In this way, gas can directly enter the gas chamber 120a from the outlet end of the gas delivery pipe 250 and enter the gas through hole 113 along the axial direction of the gas chamber 120a. Therefore, the gas flows smoothly and unobstructed into the mixing chamber 110a, thus ensuring the gas flow rate. Furthermore, by extending the gas chamber 120a in a straight line, the structure of the gas connector can be simplified, and the structures of the mixing chamber 110a and the gas chamber 120a can be made more compact.

[0062] In one implementation, such as Figure 2 As shown, in the axial direction of the mixing chamber 110a, the gas through-hole 113 is located between the air inlet 111 and the mixed gas outlet 112. This not only facilitates the mixing of air and gas in the mixing chamber 110a, but also facilitates the smooth flow of the mixed gas from the mixed gas outlet 112. Furthermore, it facilitates the arrangement of the gas through-hole 113, the air inlet 111, and the mixed gas outlet 112, avoiding mutual interference between them, and improving the smoothness of air and gas flow.

[0063] Optionally, such as Figure 3 As shown, in the axial direction of the mixing chamber 110a, the second end of the sleeve 130 is located between the gas through hole 113 and the mixed gas outlet 112. This not only facilitates the smooth flow of gas into the gas flow channel 130b, but also prevents gas from flowing out through the air flow channel 130a, thus avoiding gas leakage and further improving the safety of the mixing connector 100.

[0064] In one implementation, such as Figure 2 and Figure 3 As shown, the first end 131 of the sleeve 130 has a positioning ring platform 133, and the air inlet 111 has a positioning ring groove 111a. The positioning ring platform 133 is adapted to fit into the positioning ring groove 111a.

[0065] In one example, the positioning ring platform 133 is formed by extending horizontally outward from the edge of the first end 131 of the sleeve 130, and the positioning ring groove 111a is formed by recessing inward from the inner wall of the air inlet 111. Thus, the positioning ring platform 133 and the positioning ring groove 111a can be used to position the sleeve 130 during installation, making the assembly of the sleeve 130 and the mixing section 110 more convenient and efficient. Furthermore, it facilitates sealing the connection between the sleeve 130 and the mixing chamber 110a, thereby further improving the sealing performance of the gas flow channel 130b and preventing gas leakage from the gap between the sleeve 130 and the inner wall of the mixing chamber 110a. Preferably, a sealing gasket can be provided between the positioning ring platform 133 and the positioning ring groove 111a to further improve the sealing performance.

[0066] In one implementation, such as Figure 3 As shown, the extending direction of the gas chamber 120a is radial to that of the mixing chamber 110a, meaning that the axial direction of the mixing chamber 110a is perpendicular to the axial direction of the gas chamber 120a. Therefore, the processing of the gas through-hole 113 is relatively convenient, facilitating the connection between the internal space of the mixing chamber 110a and the internal space of the gas chamber 120a. Furthermore, the flow direction of the gas entering the gas flow channel 130b through the gas through-hole 113 is perpendicular to the extending direction of the gas flow channel 130b, which helps to increase the flow velocity of the gas within the gas flow channel 130b, thereby improving the mixing effect of the gas with air within the mixing chamber 110a.

[0067] In one implementation, such as Figure 3 As shown, the second end of the gas section 120 (i.e. the end of the gas section 120 away from the mixing section 110) is provided with a connection bayonet 121, which is used to connect to the gas outlet end of the gas delivery pipe 250.

[0068] In one example, the inner diameter of the connecting bayonet 121 is larger than the inner diameter of the adjacent mixing section 110 of the gas section 120, so that a portion of the gas delivery pipe 250 extends into the extension section and communicates with the gas chamber 120a. The wall of the extension section is provided with a positioning hole 122, which penetrates the wall in the thickness direction. A positioning element passes through the positioning hole 122 and engages with the outer peripheral wall of the gas delivery pipe 250. The output end of the gas delivery pipe 250 may be provided with a nozzle 250a to increase the flow rate of gas entering the gas chamber 120a.

[0069] Furthermore, such as Figure 4 As shown, the outer peripheral wall of the portion of the gas delivery pipe 250 that extends into the connecting buckle is provided with an installation annular groove 212. Specifically, there are multiple installation annular grooves 212, which are spaced apart along the length of the gas delivery pipe 250. The positioning member engages with the installation annular groove 212 to fix the gas delivery pipe 250 to the connecting buckle 121.

[0070] In one embodiment, as shown in Figures 5-10 The gas pressure regulating part includes a regulating joint 200, an on-off valve 300 and a controller.

[0071] Specifically, the regulating joint 200 is defined with a regulating cavity 210 and a gas delivery cavity 220 extending from the regulating cavity 210, the regulating cavity 210 is formed with a gas outlet 211, the gas outlet 211 is in communication with an inlet end of a gas delivery pipe 250, the gas delivery cavity 220 is formed with a gas inlet 225, a gas hole is formed at the connection between the regulating cavity 210 and the gas delivery cavity 220, the gas hole is in communication with the interior space of the regulating cavity 210 and the interior space of the gas delivery cavity 220. The on-off valve 300 is installed in the gas delivery cavity 220, the on-off valve 300 has an open state and a closed state, the on-off valve 300 avoids the gas hole in the open state, and the on-off valve 300 at least blocks part of the gas hole in the closed state. The controller communicates with the on-off valve 300 to control the on-off valve 300 to switch between the open state and the closed state. The gas section 120 of the gas mixing joint 100 is connected with the gas outlet 211 through the gas delivery pipe 250.

[0072] In one example, the regulating joint 200 and the gas delivery pipe 250 can be an integral piece, the regulating cavity 210 can be defined by the gas delivery pipe 250, and the gas outlet 211 is formed between the inlet end of the gas delivery pipe 250 and the gas delivery cavity 220.

[0073] By setting the regulating joint 200, the on-off valve 300 and the controller, the working state of the on-off valve 300 can be controlled by the controller to switch between the open state and the closed state, so that the on-off valve 300 avoids the gas hole or at least blocks part of the gas hole. In this way, the flow area of the gas between the regulating cavity 210 and the gas delivery cavity 220 can be controlled according to specific needs, for example, when the gas pressure is large, the on-off valve 300 can be used to avoid the gas hole, so that the regulating cavity 210 and the gas delivery cavity 220 have a larger flow area, so as to reduce the pressure of the gas entering the regulating cavity 210, and when the gas pressure is small, the on-off valve 300 can be used to block part of the gas hole, so that the regulating cavity 210 and the gas delivery cavity 220 have a smaller flow area, so as to increase the pressure of the gas entering the regulating cavity 210.

[0074] Therefore, the gas premixing device 1 can be used to adjust the pressure of the gas flowing through the gas premixing device 1, so that the pressure of the gas flowing through the gas premixing device 1 can be controlled within a certain pressure range, avoiding that the pressure of the gas flowing through the gas premixing device 1 is too small or too large, facilitating the gas water heater to adjust the gas intake. For example, the gas water heater adjusts the gas intake by using the proportional valve 400. Since the proportional valve 400 needs to be within a certain gas pressure range to achieve better adjustment performance, it is convenient to make the proportional valve 400 within the appropriate gas pressure adjustment range, so that the proportional valve 400 can accurately adjust the gas intake, improve the adjustment accuracy of the proportional valve 400 to the gas intake, improve the gas intake stability and reliability, make the gas and air reach the appropriate proportion, facilitate the mixed gas of the gas and air to burn fully, improve the combustion efficiency of the mixed gas, not only can improve the preparation efficiency of hot water, improve the stability of hot water outlet, improve the user's use comfort, but also can reduce the emission of harmful gases in the exhaust gas, improve the environmental performance of the gas water heater.

[0075] Furthermore, by arranging the adjusting joint 200, the on-off valve 300 and the controller, the on-off valve 300 is used to control the size of the flow area between the adjusting cavity 210 and the gas conveying cavity 220. Compared with the related art which uses a Venturi tube to adjust the gas pressure, since the gas inlet hole of the Venturi tube is fixed, the range of the gas pressure adjustment is small, it is difficult to achieve stable adjustment of the gas when the gas pressure is large or small, which can cause unstable combustion of the mixed gas of the gas and air, make the hot water outlet temperature deviation large, and the structure of the Venturi tube is complex, the processing difficulty is large, and the assembly time is long. The gas premixing device 1 not only can make the gas intake and the air intake have an accurate proportion, improve the stability and reliability of the mixed gas of the gas and air, improve the working reliability of the gas water heater, but also facilitate the production of the gas water heater, improve the production efficiency of the gas water heater, and reduce the production cost of the gas water heater.

[0076] In one embodiment, as shown in Figures 6-10 The gas hole includes a first gas hole 231 and a second gas hole 232, the first gas hole 231 and the second gas hole 232 are arranged at intervals, the on-off valve 300 avoids the first gas hole 231 in the open state, and the on-off valve 300 blocks the first gas hole 231 in the closed state. In this way, not only can the gas be smoothly introduced into the adjusting cavity 210 to ensure the normal work of the gas water heater, but also the on-off valve 300 can be used to avoid or block the first gas hole 231 to adjust the flow area of the gas hole, facilitate the adjustment of the pressure of the gas in the gas premixing device 1, and improve the working reliability and stability of the gas water heater.

[0077] Optionally, the connection between the gas delivery cavity 220 and the adjusting cavity 210 is separated by a peripheral wall of the gas delivery cavity 220, and the first gas hole 231 and the second gas hole 232 are respectively formed on the peripheral wall. In this way, not only the formation of the first gas hole 231 and the second gas hole 232 is facilitated, but also the machining efficiency of the first gas hole 231 and the second gas hole 232 is improved, and the opening and closing of the first gas hole 231 by the on-off valve 300 is facilitated.

[0078] In one example, as shown in Figure 6 and Figure 7 , the first gas hole 231 is located at the center, and the second gas hole 232 is multiple and arranged along the circumference of the first gas hole 231. In this way, the first gas hole 231 is opened or blocked by the on-off valve 300, and the pressure of the gas in the gas premixing device 1 is adjusted by the gas premixing device 1, thereby improving the adjustment effect of the gas intake amount of the gas water heater. At the same time, the space for the gas hole and the on-off valve 300 is saved, thereby reducing the size of the gas premixing device 1, making the whole gas premixing device 1 more compact and flexible, and further facilitating the installation of the gas premixing device 1.

[0079] Further, as shown in Figure 6 and Figure 7 , the distance between each second gas hole 232 and the first gas hole 231 is equal, and the multiple second gas holes 232 are equally spaced along the circumference of the first gas hole 231. In this way, the distribution of the second gas hole 232 is more uniform, thereby making the gas flow more uniform when the gas flows from the gas delivery cavity 220 into the adjusting cavity 210, facilitating the uniform stress of the gas premixing device 1, and improving the structural stability of the gas premixing device 1.

[0080] In one example, as shown in Figures 8-10 , the circumference of the first gas hole 231 is surrounded by a surrounding plate 240, and the on-off valve 300 is adapted to abut against the surrounding plate 240 to close the first gas hole 231. In this way, the on-off valve 300 opens or closes the first gas hole 231 by avoiding or blocking the surrounding plate 240, which not only facilitates the adjustment of the gas hole flow area by the on-off valve 300, but also improves the sealing effect of the first gas hole 231 by the on-off valve 300, thereby further improving the working reliability of the gas premixing device 1.

[0081] Further, one end of the surrounding plate 240 is connected to the outer peripheral wall of the adjusting cavity 210, and the other end extends away from the outer peripheral wall. Further, the surrounding plate 240 is integrally formed with the adjusting cavity 210. In this way, the surrounding plate 240 is facilitated to be arranged, and the first gas hole 231 is further sealed by the on-off valve 300.

[0082] Specifically, as shown in Figure 6As shown in the figure, one end of the gas delivery cavity 220 has a mounting port 221, at least a part of the on-off valve 300 extends into the gas delivery cavity 220 through the mounting port 221, a mounting seat 222 is arranged at the mounting port 221, and the on-off valve 300 is mounted on the mounting seat 222. In this way, the on-off valve 300 can be conveniently mounted and arranged, the arrangement reliability of the on-off valve 300 can be improved, the flow area of the gas hole can be further adjusted by the on-off valve 300, and the adjustment effect of the gas premixing device 1 on the gas pressure in the gas premixing device 1 can be improved.

[0083] In one example, the mounting seat 222 is integrally formed with the gas delivery cavity 220. In this way, the mounting seat 222 can be conveniently formed, the assembly process of the gas premixing device 1 can be simplified, and the production efficiency of the gas premixing device 1 can be improved.

[0084] Further, the mounting port 221 is arranged opposite to the gas hole. In this way, the on-off valve 300 can be conveniently opened or blocked to the gas hole, the flow area of the gas hole can be adjusted by the on-off valve 300, and the adjustment reliability of the on-off valve 300 can be improved.

[0085] Optionally, as shown in the figures, Figure 6 and Figure 7 the gas delivery cavity 220 further has a pressure measuring hole 223 for measuring the pressure of the gas delivery cavity 220 through the pressure measuring hole 223. In this way, the gas pressure in the gas delivery cavity 220 can be measured by the pressure measuring hole 223, the gas pressure in the gas delivery cavity 220 can be accurately determined, and the flow area of the gas hole can be further adjusted.

[0086] Specifically, the extension direction of the adjustment cavity 210 is perpendicular to the extension direction of the gas delivery cavity 220. In this way, the gas hole can be conveniently formed, the interior space of the adjustment cavity 210 and the interior space of the gas delivery cavity 220 can be conveniently connected by the gas hole, the on-off valve 300 can be conveniently mounted and arranged, the flow area between the adjustment cavity 210 and the gas delivery cavity 220 can be controlled by the on-off valve 300, the pressure of the gas in the gas premixing device 1 can be adjusted, and the pressure of the gas can be kept within a certain range.

[0087] Optionally, as shown in the figures, Figures 6-8 one end of the gas delivery cavity 220 has a connecting seat 224, the other end is connected with the adjustment cavity 210, the connecting seat 224 is adapted to be connected with the gas source, and the connecting seat 224 is integrally formed with the gas delivery cavity 220. In this way, the gas delivery cavity 220 can be conveniently connected with the gas source to improve the connection firmness and reliability between the gas delivery cavity 220 and the gas source, the gas delivery cavity 220 can be conveniently connected with the adjustment cavity 210 to improve the structural reliability and stability of the gas premixing device 1, gas leakage can be avoided, and the working safety performance of the gas water heater can be improved.

[0088] Specifically, as shown in the figures,Figure 8 As shown, the other end of the adjusting cavity 210 is provided with a plurality of mounting ring grooves 212 which are arranged along the length direction of the adjusting cavity 210. Specifically, the mounting ring grooves 212 are arranged on the outer circumferential surface of the adjusting cavity 210 and extend along the circumferential direction of the adjusting cavity 210. In this way, the gas premixing device 1 can be connected to the gas mixing joint 100, and the sealing effect between the gas premixing device 1 and other structures can be improved, so that gas leakage can be avoided, and the working reliability and safety of the gas water heater can be improved.

[0089] Optionally, the on-off valve 300 is an electromagnetic valve. In this way, the on-off valve 300 can be controlled electrically, which not only facilitates the control of the opening and closing of the first gas hole 231 by the on-off valve 300 and improves the control reliability and stability of the on-off valve 300, but also facilitates the improvement of the sensitivity and accuracy of the control of the on-off valve 300 by the controller and the control of the opening and closing of the first gas hole 231 by the on-off valve 300, and the reliability of the function switching of the gas premixing device 1 can be improved.

[0090] Specifically, as shown in Figure 9 and Figure 10 , the on-off valve 300 comprises a sealing member 310. Specifically, the projection of the surrounding plate 240 on the sealing member 310 is located inside the outer contour of the sealing member 310. In this way, the first gas hole 231 can be blocked by the sealing member 310, and the sealing effect of the on-off valve 300 on the first gas hole 231 can be improved. At the same time, when the on-off valve 300 is in the closed state, the sealing member 310 is in a state of being pressed by the gas, which is conducive to improving the sealing effect of the sealing member 310.

[0091] Optionally, the gas hole can be used to mount the nozzle 250a.

[0092] In an embodiment, the gas premixing device 1 further comprises a proportional valve 400 connected to the gas inlet end of the gas pressure adjusting part, and the proportional valve 400 is provided with a gas inlet joint 410 for communicating with the gas source. The gas inlet end of the gas pressure adjusting part can be the gas inlet 225 of the gas delivery cavity 220. Further, the proportional valve 400 is electrically connected to the controller, and the controller controls the gas flow of the proportional valve 400 according to the detection value of the detection device.

[0093] The gas water heater according to the embodiments of the present application will be described below with reference to Figure 1 .

[0094] As shown in Figure 1 , the gas water heater according to the embodiments of the present application comprises the gas premixing device 1 according to the embodiments of the present application.

[0095] In an embodiment, the gas water heater further comprises a housing, a fan assembly 2 and a detection device. The fan assembly 2 is arranged in the housing, and the gas premixing device 1 is arranged on the fan assembly 2. The detection device is arranged in the housing and is configured to detect the water outlet temperature. Thus, the air and the gas can be reliably input, the air intake and the gas intake can be controlled respectively, the air and the gas can have a suitable ratio range, the gas can be fully combusted, the combustion efficiency of the gas can be improved, the efficiency of the gas water heater in preparing hot water can be improved, the harmful substances in the tail gas can be reduced, the natural environment can be protected, and the environmental protection performance of the gas water heater can be improved. Meanwhile, the ratio of the air and the gas can be determined according to the detection value of the detection device, and the working reliability of the gas water heater can be further improved.

[0096] In an embodiment, the fan assembly 2 comprises a casing 201, a cover plate 202 and a fan. Specifically, the cover plate 202 and the casing 201 define a containing cavity, the cover plate 202 is provided with an air inlet, the gas mixing connector 100 is arranged on the air inlet, and the fan is arranged in the containing cavity. Thus, the gas mixing connector 100 can be arranged conveniently, the installation space required for arranging the gas mixing connector 100 can be reduced, the compactness and rationality of the gas water heater can be improved, and the mixed gas of the air and the gas can be introduced into the containing cavity for full mixing.

[0097] In an example, the cover plate 202 is provided with a mounting flange, and the gas mixing connector 100 is arranged on the mounting flange through a threaded connection. Thus, the gas mixing connector 100 can be arranged conveniently, the gas mixing connector 100 can be firmly arranged on the cover plate 202, the reliability and stability of the fixed connection between the gas mixing connector 100 and the cover plate 202 can be ensured, and the gas mixing connector 100 can be quickly replaced and repaired when the gas mixing connector 100 fails, thereby reducing the maintenance cost of the gas water heater.

[0098] In an example, the controller is electrically connected with the on-off valve 300, the proportional valve 400 and the detection device, so as to control the air intake of the proportional valve 400 and the on-off of the on-off valve 300 according to the detection value of the detection device. Thus, the air intake of the gas can be further controlled by the controller, and the air intake stability of the gas can be improved.

[0099] The other configurations of the gas water heater in the above embodiments can adopt various technical solutions known by those skilled in the art at present and in the future, which will not be described in detail here.

[0100] According to the gas premixing device 1 of the embodiment of the present application, by adopting the gas mixing joint 100 provided with the mixing cavity 110a and the gas cavity 120a, the gas enters the mixing cavity 110a through the gas cavity 120a to be premixed with the air, thereby the gas premixing device 1 of the embodiment of the present application has the advantages of simple structure, convenient processing and high production efficiency. Furthermore, by extending the part of the sleeve 130 from the air inlet 111 into the mixing cavity 110a, the air and the gas can be guided in the mixing cavity 110a, the air inlet 111 and the mixed gas outlet 112 are convenient to process, the air and the gas can be mixed in the mixing cavity 110a, and the mixed gas of the air and the gas can flow out through the mixed gas outlet 112, which further facilitates to improve the working performance of the gas premixing device 1.

[0101] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0102] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0103] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected, or it can be communicated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication or interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0104] In this application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature with respect to a second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "on top of" of a first feature with respect to a second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is horizontally higher than the second feature. "Under", "below" and "underneath" of a first feature with respect to a second feature includes that the first feature is directly above and obliquely above the second feature, or only means that the first feature is horizontally lower than the second feature.

[0105] The above disclosure provides many different embodiments or examples for implementing different structures of the present application. For simplicity of the disclosure, the above description of certain embodiments has not included the description of certain features or settings that are well known to those skilled in the art. However, it is to be understood that such features and settings are within the scope of the present application. Moreover, the present application can be used in a variety of examples, and the foregoing examples are intended to be illustrative only and not intended to limit the scope of the present application. Further, the present application can be repeated with variations and permutations of each described example without departing from the scope of the present application. Such repetitions of similar examples with variations should be considered within the scope of the present application.

[0106] The above description is only specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any skilled person in the art can easily think of various changes or replacements within the technical scope disclosed in the present application, and these should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A gas premixing device, characterized in that, include: A gas mixing connector is installed at the air inlet of a fan assembly. The gas mixing connector includes a mixing section and a gas section. The gas section and the mixing section are an integral structure. The mixing section defines a mixing chamber inside. The mixing chamber has an air inlet and a mixed gas outlet at its two ends, respectively. The gas section is formed by extending outward from the wall of the mixing section. The gas section defines a gas chamber inside. The first axial end of the gas chamber communicates with the mixing chamber to form a gas through hole. A gas delivery pipe, wherein the outlet end of the gas delivery pipe is connected to the second axial end of the gas chamber; The gas pressure regulating unit has its outlet end connected to the inlet end of the gas delivery pipe, and is used to regulate the gas pressure of the gas entering the gas delivery pipe.

2. The gas premixing device according to claim 1, characterized in that, The gas delivery pipe is coaxially arranged with the gas chamber, and the gas outlet end of the gas delivery pipe is directly opposite the gas through hole.

3. The gas premixing device according to claim 1, characterized in that, The pressure regulating unit includes: An adjusting connector defines an adjusting cavity and a gas delivery cavity extending from the adjusting cavity. A gas outlet is formed on the adjusting cavity and communicates with the inlet end of the gas delivery pipe. An air hole is formed at the communication between the adjusting cavity and the gas delivery cavity. An on / off valve is installed in the gas delivery chamber. The on / off valve has an open state and a closed state. When the on / off valve is in the open state, it avoids the gas orifice. When the on / off valve is in the closed state, it at least blocks part of the gas orifice. A controller that communicates with the on / off valve to control the on / off valve to switch between the open state and the closed state.

4. The gas premixing device according to claim 3, characterized in that, The vent includes a first vent and a second vent, which are spaced apart. When the on / off valve is in the open state, it avoids the first vent, and when the on / off valve is in the closed state, it blocks the first vent.

5. The gas premixing device according to claim 1, characterized in that, The mixing connector further includes a sleeve that extends at least partially into the mixing chamber, wherein the inner peripheral wall of the sleeve defines an air flow path, and the outer peripheral wall of the sleeve located within the mixing chamber is spaced apart from the inner wall of the mixing chamber to define a gas flow path.

6. The gas premixing device according to claim 5, characterized in that, The first end of the sleeve is installed at the air inlet and is in close contact with the inner wall of the air inlet. The second end of the sleeve extends into the mixing chamber. The outer peripheral wall of the sleeve is spaced apart from the gas passage.

7. The gas premixing device according to claim 6, characterized in that, The first end of the sleeve has a positioning ring platform, and the air inlet has a positioning ring groove that mates with the positioning ring platform.

8. The gas premixing device according to claim 7, characterized in that, In the axial direction of the mixing chamber, the second end of the sleeve is located between the gas through hole and the mixed gas outlet.

9. The gas premixing device according to claim 1, characterized in that, The gas chamber extends in the radial direction of the mixing chamber.

10. The gas premixing device according to claim 1, characterized in that, The second end of the gas section is provided with a connection bayonet for connecting to the gas outlet end of the gas delivery pipe.

11. The gas premixing device according to claim 1, characterized in that, Also includes: A proportional valve is connected to the air inlet of the pressure regulating unit, and the proportional valve is provided with a gas inlet connector for the gas premixing device.

12. A gas-fired water heater, characterized in that, Includes the gas premixing device according to any one of claims 1-11.

13. The gas water heater according to claim 12, characterized in that, The gas water heater also includes: case; A fan assembly, wherein the fan assembly is disposed within the housing, and the gas premixing device is installed on the fan assembly; A detection device for detecting the temperature of the outlet water, wherein the detection device is disposed within the housing.

14. The gas water heater according to claim 13, characterized in that, The wind turbine assembly includes: chassis; A cover plate, which, together with the housing, defines a receiving cavity; the cover plate is provided with an air inlet; and the air mixing connector is installed at the air inlet. A fan, wherein the fan is disposed within the receiving cavity.

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