Premixing device and wall-hanging stove thereof

Abstract

The utility model discloses a premixing device and a wall-hanging stove thereof, the premixing device comprises a premixer, the premixer is provided with a plurality of throats which are arranged at intervals in the circumferential direction and have different diameters, the outer side wall of the premixer is provided with a plurality of gas inlets which are arranged at intervals in the circumferential direction, and the gas inlets are communicated with the throats. The plurality of gas inlets and the plurality of throats are in one-to-one correspondence and are arranged in a communicating manner; and the air inlet seat is rotationally connected with the premixer, the air inlet seat is provided with an air inlet, and the air inlet can be communicated with any throat channel. The premixing device disclosed by the utility model can be matched with a proper throat sectional area according to different power sections and load ratios, so that the adaptability is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wall -hanging stove technical field especially relates to a premixing device and wall -hanging stove thereof. BACKGROUND

[0002] Most of the premixers of full premix combustion on the market are single venturi, and the inlet section and throat cross-sectional area of the venturi are fixed. Under the driving of the wall-hanging stove full premix blower, high-speed air is sucked from the inlet section, the flow rate is accelerated through the throat contraction, and under the action of negative pressure, the gas connected with the throat is sucked into the full premix blower for full mixing, so that the best air-fuel ratio (referring to the mixing ratio of air and gas) is realized.

[0003] However, the venturi with fixed inlet section and throat cross-sectional area cannot further improve the load ratio (referring to the ratio of minimum load to maximum load) of the heating stove, affecting the adaptability of the premixer. SUMMARY

[0004] The utility model aims at at least in a certain extent solves one of the problems existing in prior art related, for this, the utility model provides a premixing device, can according to different power section and load ratio match the throat cross-sectional area of adaptability, increase adaptability. The utility model further provides a wall-hanging stove.

[0005] According to the premixing device provided above, the following technical scheme is used to realize it:

[0006] A premixing device comprises: a premixer, which is provided with a plurality of throats arranged at a circumferential interval and having different diameters, and a plurality of gas inlets arranged at a circumferential interval on the outer wall of the premixer, wherein the plurality of gas inlets and the plurality of throats are one-to-one corresponding and arranged in communication; and an air inlet seat, which is rotationally connected with the premixer, and is provided with an air inlet capable of being in communication with any of the throats.

[0007] In some embodiments, the premixer is cylindrical and fits the air inlet seat, and / or the throat has a flared structure at one end close to the air inlet seat.

[0008] In some embodiments, the air inlet has a flared structure with a small end close to the premixer and a large end, and / or the diameter of the air outlet end of the air inlet is larger than the diameter of any of the throats.

[0009] In some embodiments, the premixer is provided with a first rotating shaft extending towards the air inlet seat, the air inlet seat is provided with a first shaft hole at a position corresponding to the first rotating shaft, and the first rotating shaft is rotatably arranged in the first shaft hole.

[0010] In some embodiments, the air inlet is transversely through the air inlet section and the fixed section.

[0011] In some embodiments, the premixing device further comprises a premixing fan, which is arranged on the side of the premixer away from the air inlet seat, and is provided with an air inlet and an air outlet connected with the air inlet.

[0012] In some embodiments, the premixing device further comprises a mounting seat arranged between the air inlet seat and the premixing fan, which is provided with a receiving cavity opening towards the air inlet seat, and the premixer is rotatably embedded in the receiving cavity.

[0013] In some embodiments, a second shaft hole is formed on the side of the air inlet seat opposite to the mounting seat, and the premixer is provided with a second rotating shaft extending outward at the position corresponding to the second shaft hole, and the second rotating shaft is transversely and rotatably arranged in the second shaft hole.

[0014] In some embodiments, the premixing device further comprises a power member, the output end of which is connected with the premixer to drive the premixer to rotate.

[0015] According to the above-mentioned wall-hanging stove, the premixing device is achieved by the following technical scheme: a wall-hanging stove comprises a premixing device as described above.

[0016] Compared with the prior art, the premixing device has at least the following beneficial effects:

[0017] The premixing device of the present application has the following advantages: the premixer is rotatably mounted on the air inlet seat, and the air inlet on the air inlet seat can be connected with any of the throat passages, so that the premixer does not need to be replaced, and the throat passage cross-sectional area can be matched according to different power sections and load ratios, thereby increasing the convenience of adjustment and enhancing the adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is an exploded view of the premixing device in the embodiment of the present application;

[0019] Figure 2 is a structure diagram of the premixing device in the embodiment of the present application;

[0020] Figure 3 is a sectional view of the premixing device in the embodiment of the present application;

[0021] Figure 4 is a structure diagram of the premixer in the embodiment of the present application Figure 1 ;

[0022] Figure 5 is a structure diagram of the premixer in the embodiment of the present application Figure 2 ;

[0023] Figure 6 is a structure diagram of the air inlet seat in the embodiment of the present application;

[0024] Figure 7 is a structure diagram of the mounting seat in the embodiment of the present application Figure 1 ;

[0025] Figure 8 is a structure diagram of the mounting seat in the embodiment of the present application Figure 2 .

[0026] In the figure: 1-premixer, 11-throat, 12-gas inlet, 13-first rotating shaft, 14-second rotating shaft; 2-air inlet seat, 21-fixed section, 211-first shaft hole, 212-first boss, 22-air inlet section, 221-air inlet; 3-mounting seat, 31-receiving cavity, 32-premixing outlet, 321-flange, 33-gas interface, 34-second boss, 35-gap, 36-second shaft hole, 37-fixing column; 4-premixing fan, 41-air inlet, 42-air outlet; 5-power component. DETAILED DESCRIPTION

[0027] The following embodiments are used to illustrate the present application, but the present application is not limited by these embodiments. Modifications to the specific embodiments of the present application or equivalent replacements to some technical features without departing from the spirit of the present application scheme should be covered in the technical scheme range claimed by the present application.

[0028] Embodiment 1

[0029] Reference Figures 1-6The embodiment provides a premixing device, which comprises a premixer 1 and an air inlet seat 2, the premixer 1 is provided with a plurality of throat passages 11 which are arranged in a circumferential direction and have different diameters, a plurality of gas inlets 12 are arranged in a circumferential direction on the outer wall of the premixer 1, the plurality of gas inlets 12 are arranged in one-to-one correspondence and communication with the plurality of throat passages 11. In the embodiment, the number of the throat passages 11 and the number of the gas inlets 12 are both four, the four throat passages 11 and the four gas inlets 12 are circumferentially and evenly distributed, the diameters of the four throat passages 11 decrease in a clockwise direction, each throat passage 11 is arranged in an axial direction of the premixer 1 and penetrates through the front and back end surfaces of the premixer 1 respectively, and each gas inlet 12 is arranged in a radial direction of the premixer 1 and communicates with the corresponding throat passage 11.

[0030] The air inlet seat 2 is arranged in front of the premixer 1 and rotationally connected with the premixer 1, the air inlet seat 2 is provided with an air inlet 221 which can communicate with any throat passage 11. In the embodiment, the premixer 1 can rotate relative to the air inlet seat 2. When air is sucked from the air inlet 221, vacuum negative pressure is formed in the throat passage 11, and gas is sucked from the gas inlet 12 into the throat passage 11 for mixing to form gas-air mixture. Since the premixer 1 is provided with a plurality of throat passages 11 which have different diameters, the premixing device can match the throat passage cross-sectional area according to different power segments and load ratios, and the purpose of matching the load ratio of the wall-hanging stove with the premixer is achieved without replacing the premixer, the convenience of adjustment is increased, and the adaptability is enhanced.

[0031] Reference Figures 3-5 The premixer 1 is in a cylindrical shape, and the back surface of the premixer 1 is attached to the back surface of the air inlet seat 2 to form an end surface seal, so that air leakage does not occur at the connection between the two; and / or the end of the throat passage 11 close to the air inlet seat 2 is in a flared structure. In the embodiment, the throat passage 11 comprises a flared section and a straight section which are sequentially communicated, the flared section communicates with the air inlet 221, and the straight section communicates with the gas inlet 12, so that air is sucked from the air inlet 221, the flow rate is accelerated through the contraction of the throat passage 11, vacuum negative pressure is formed, and gas connected with the throat passage 11 is sucked from the gas inlet for mixing under the action of the negative pressure. It is particularly pointed out that the premixer 1 can be driven to rotate relative to the air inlet seat 2 by a manual or electric mode, so that the air inlet 221 communicates with the throat passages with different diameters, and the adaptability of the premixing device is improved.

[0032] Reference Figures 1-3 And Figure 6 The air inlet 221 is in a flared structure with one end close to the premixer 1 being small and the other end being large, so that the flow rate of the air flowing through the air inlet 211 is accelerated, and vacuum negative pressure is formed; and / or the diameter of the air outlet end of the air inlet 221 is larger than the diameter of any throat passage 11, so that the air sucked from the air inlet 211 is again contracted through the throat passage 11, the flow rate is accelerated, and the air and gas injection efficiency is improved.

[0033] Referring to Figures 1-6 , the first rotating shaft 13 is protruded from the side of the premixing device 1 facing the air inlet 2, and extends towards the air inlet 2. The air inlet 2 is provided with a first shaft hole 211 corresponding to the position of the first rotating shaft 13, and the first rotating shaft 13 is rotatably arranged in the first shaft hole 211 to form a first supporting position. In this embodiment, the first rotating shaft 13 is arranged at the center of the front side of the premixing device 1, and the air inlet 221 is arranged to be inclined. The first shaft hole 211 is arranged at the center of the air inlet 2.

[0034] Referring to Figure 6 , the air inlet 2 includes a fixed section 21 and an air inlet section 22 fixedly connected together. The fixed section 21 is vertically arranged between the premixing device 1 and the air inlet section 22. The back side of the fixed section 21 is attached to the front side of the premixing device 1, and the fixed section 21 is rotatably connected to the premixing device 1. The first shaft hole 211 is arranged at the center of the fixed section 21, and the air inlet 221 is arranged to transversely pass through the air inlet section 22 and the fixed section 21. In this embodiment, the air inlet section 22 and the air inlet 221 are both in a flared structure to facilitate better air intake.

[0035] Referring to Figures 1-3 , further comprising a premixing fan 4 arranged on the side of the premixing device 1 away from the air inlet 2. The premixing fan 4 is provided with an air inlet 41 and an air outlet 42. The air inlet 41 is connected to the air inlet 221 through any one of the air passages 11, and the air outlet 42 is connected to the air inlet 41. When the premixing device is working, under the driving of the suction of the premixing fan 4, air is sucked into the air passage 11 from the air inlet 221, and the cross section is contracted to form a vacuum negative pressure, which drives the gas to be sucked into the air passage 11 from the gas inlet 12 to mix and form gas-air mixture. Then, the gas-air mixture is fully mixed in the premixing fan 4, and flows out of the air outlet 42 of the premixing fan 4 to form the mixed mixture.

[0036] Embodiment 2

[0037] Referring to Figures 1-8The difference between the embodiment and the embodiment 1 is that the mounting seat 3 is arranged between the air inlet seat 2 and the premixing fan 4, and the mounting seat 3 is connected and fixed with the air inlet seat 2 and the premixing fan respectively, the mounting seat 3 is provided with the accommodating cavity 31 which is open to the air inlet seat 2, and the premixer 1 is rotatably embedded in the accommodating cavity 31. The mounting seat 3 is provided with the premixing outlet 32 which extends to the premixing fan 4 at the position corresponding to the air inlet 41, one end of the premixing outlet 32 is communicated with the air inlet 41, and the other end is communicated with the air inlet 221 through any throat 11; the gas interface 33 is arranged on the outer side wall of the mounting seat 3, and the gas interface 33 can be communicated with any gas inlet 12. It can be seen that the mounting seat 3 is arranged to realize the fixed connection of the air inlet seat and the premixing fan, and the premixer 1 is reliably positioned and fixed in the mounting seat 3, and the suction of the gas and air and the discharge of the mixed gas are not affected.

[0038] Reference Figures 1-3 and Figures 6-8 The first bosses 212 which extend outward are arranged on the outer side wall of the fixed section 21 of the air inlet seat 2, and the first bosses 212 are arranged in the circumferential direction of the fixed section 21 and are integrally formed with the fixed section. The second bosses 34 which extend outward are integrally formed on the outer side wall of the mounting seat 3 at the positions corresponding to the first bosses 212, and the second bosses 34 are detachably connected with the corresponding first bosses 212 through screws, so as to realize the reliable detachable connection of the air inlet seat 2 and the mounting seat 3 as a whole. In addition, the positioning notches 35 which are communicated with the accommodating cavities 31 and are suitable for accommodating the first bosses 212 are arranged on the outer side wall of the mounting seat 3 at the positions corresponding to the first bosses 212, the first bosses 212 are embedded in the corresponding positioning notches 35 and are detachably connected with the corresponding second bosses 34, so as to realize the quick pre-positioning and circumferential positioning of the air inlet seat 2.

[0039] The flange plate 321 which extends outward is integrally formed on the free end of the premixing outlet 32, the premixing fan 4 is detachably mounted on the flange plate 321, and the air inlet of the premixing fan 4 is communicated with the premixing outlet 32 of the mounting seat 3, so as to realize the reliable mounting of the premixing fan 4 on the mounting seat.

[0040] In addition, the second shaft hole 36 is arranged on the side of the mounting seat 3 which is away from the air inlet seat 2, the second rotating shaft 14 which extends outward is integrally formed on the premixer 1 at the position corresponding to the second shaft hole 36, and the second rotating shaft 14 is rotatably transversely arranged in the second shaft hole 36, so as to form the second supporting position,

[0041] Embodiment 3

[0042] Reference Figures 1-8The difference between the embodiment and the embodiments 1 or 2 is that the power member 5 is further included, the power member 5 is preferably a regulating motor, and an output end of the power member 5 is connected with the premixing device 1, and is used for driving the premixing device 1 to rotate, so that the rotation of the premixing device 1 is regulated by electricity, and the automation level and the regulating accuracy are improved.

[0043] Specifically, the mounting mode of the power member 5 includes but is not limited to any one of the following modes:

[0044] Firstly, the power member 5 is fixedly installed on the air inlet seat 2, and the first rotating shaft 13 of the premixing device 1 is in transmission connection with the output end of the power member 5 after being rotatably penetrated through the first shaft hole 211 of the air inlet seat 2.

[0045] Referring to Figures 1-3 Secondly, the power member 5 is fixedly installed on the mounting seat 3 and is arranged close to the premixing fan, and the second rotating shaft 14 of the premixing device 1 is in transmission connection with the output end of the power member 5 after being rotatably penetrated through the second shaft hole 36 of the mounting seat 3. In the embodiment, a plurality of fixed columns 37 extending outward are protruded on the side of the mounting seat 3 away from the air inlet seat 2, the power member 5 is detachably connected with the plurality of fixed columns 37, and the second shaft hole 36 and the output end of the power member 5 are in transmission connection through a gear structure.

[0046] Embodiment 4

[0047] The embodiment provides a wall-hanging stove, and the wall-hanging stove comprises the premixing device according to any one of the embodiments 1 to 3. Through the premixing device, the throat area can be matched with the appropriate throat section area according to different power sections and load ratios, the convenience of regulation is increased, and the adaptability is enhanced.

[0048] The above only describes some embodiments of the utility model. For ordinary skilled persons in the art, without departing from the creative concept of the utility model, a plurality of modifications and improvements can be made, and these all belong to the protection scope of the utility model.

Claims

1. A premixing device, characterized in that, include: A premixer (1) is provided with a plurality of throats (11) arranged circumferentially at intervals and having different diameters. A plurality of gas inlets (12) are arranged circumferentially at intervals on the outer wall of the premixer (1). The plurality of gas inlets (12) correspond one-to-one with and are connected to the plurality of throats (11). An air inlet (2) is rotatably connected to the premixer (1). The air inlet (2) is provided with an air inlet (221), which can be connected to any of the throats (11).

2. The premixing device according to claim 1, characterized in that, The premixer (1) is cylindrical and fits against the air inlet seat (2), and / or the throat (11) has a flared structure at one end near the air inlet seat (2).

3. The premixing device according to claim 1, characterized in that, The air inlet (221) has a flared structure with one end smaller and the other end larger than the premixer (1), and / or the diameter of the air outlet end of the air inlet (221) is larger than the diameter of any of the throats (11).

4. A premixing device according to claim 1, characterized in that, The premixer (1) has a first rotating shaft (13) extending toward the air inlet seat (2). The air inlet seat (2) has a first shaft hole (211) at the position corresponding to the first rotating shaft (13). The first rotating shaft (13) is rotatably disposed in the first shaft hole (211).

5. A premixing device according to any one of claims 1-4, characterized in that, The air inlet seat (2) includes a fixed section (21) and an air inlet section (22) that are fixedly connected to each other. The fixed section (21) is disposed between the premixer (1) and the air inlet section (22). The fixed section (21) is rotatably connected to the premixer (1). The air inlet (221) passes through the air inlet section (22) and the fixed section (21) laterally.

6. A premixing device according to claim 1, characterized in that, It also includes a premixed fan (4), which is located on the side of the premixer (1) away from the air inlet seat (2). The premixed fan (4) has an air inlet (41) and an air outlet (42) connected to the air inlet (41). The air inlet (41) is connected to the air inlet (221) through any of the throats (11).

7. A premixing device according to claim 6, characterized in that, It also includes a mounting base (3), which is disposed between the air inlet seat (2) and the premixing fan (4). The mounting base (3) has a receiving cavity (31) opening toward the air inlet seat (2), and the premixer (1) is rotatably embedded in the receiving cavity (31). The mounting base (3) is provided with a premixing outlet (32) at the position corresponding to the air inlet (41). One end of the premixing outlet (32) is connected to the air inlet (41), and the other end is connected to the air inlet (221) through any of the throats (11). A gas interface (33) is provided on the outer wall of the mounting base (3), and the gas interface (33) can be connected to any of the gas inlets (12).

8. A premixing device according to claim 7, characterized in that, A second shaft hole (36) is provided on one side of the air inlet seat (2) on the back of the mounting base (3). The premixer (1) is provided with a second rotating shaft (14) extending outward at the position corresponding to the second shaft hole (36). The second rotating shaft (14) is rotatably transversely inserted through the second shaft hole (36).

9. A premixing device according to any one of claims 1-4 or 6-8, characterized in that, It also includes a power component (5), the output end of which is connected to the premixer (1) for driving the premixer (1) to rotate.

10. A wall-hung boiler, characterized in that, Includes a premixing device as described in any one of claims 1-9.

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