CN220453665U - Premixing device and gas wall-mounted boiler - Google Patents

Abstract

The utility model relates to the technical field of combustion heat exchange, in particular to a premixer and a gas wall-mounted furnace. The premixer comprises a premixer main body, an adapter sleeve, a floater and an elastic piece, wherein a mixing cavity is formed in the premixer main body. The adapter sleeve is arranged at the outlet end of the premixer main body in a sealing way, and a containing cavity is formed in the adapter sleeve and is used for being communicated with the inlet of the fan. The first side wall of the adapter sleeve facing the mixing cavity is provided with a vent hole, and the mixing cavity is communicated with the vent hole. The floater is provided with a through hole and is movably arranged in the accommodating cavity through the elastic piece; the float is abutted against the first side wall through the elastic piece so that the mixing cavity is communicated with the containing cavity through the through hole. And the float can be disengaged from the first sidewall such that the vent is fully open and directly communicates with the holding chamber mixing chamber. The gas wall-mounted furnace comprises the premixer, the flow cross-section area of the mixed gas is changed by adjusting the rotating speed of the fan, the flow variation range of the mixed gas is enlarged, and the load ratio of the premixer of the wall-mounted furnace is improved.

Description

Premixing device and gas wall-mounted boiler

Technical Field

The utility model relates to the technical field of combustion heat exchange, in particular to a premixer and a gas wall-mounted furnace.

Background

The gas wall-mounted stove has a powerful household central heating function, can meet the heating requirements of multiple rooms, and can also give consideration to the hot water bathing function.

The conventional full-premix gas wall-mounted furnace regulates the gas flow through a gas valve, regulates the air flow through controlling the rotating speed of a fan, mixes the gas and the air through a premixer, has pressure feedback on the premixer, and can change the gas flow according to the change of the air flow. The flow variation range of the mixed gas of the existing gas water heater is smaller, namely the load is smaller, and the diversified use requirements are difficult to meet.

Disclosure of Invention

One of the technical problems of the utility model is to provide a premixer, which can effectively solve the problem of smaller load of the premixer and improve the load ratio of the premixer.

The second technical problem of the utility model is to provide a gas wall-mounted furnace, which can effectively solve the problem of smaller load of a premixer and improve the load ratio of the gas wall-mounted furnace.

The first technical problem is solved by the following technical scheme:

a premixer, comprising:

the mixer comprises a mixer main body, wherein a mixing cavity is formed in the mixer main body;

the adapter sleeve is hermetically arranged at the outlet end of the premixer main body, a containing cavity is formed in the adapter sleeve, and the containing cavity is used for being communicated with the inlet of the fan; the adapter sleeve is provided with a vent hole towards the first side wall of the mixing cavity, and the mixing cavity is communicated with the vent hole;

the floater is provided with a through hole and is movably arranged in the accommodating cavity; the floater can be abutted against the first side wall through the elastic piece, so that the vent hole is communicated with the accommodating cavity through the through hole; and the float is capable of disengaging from the first sidewall such that the vent is fully open and directly communicates with the receiving chamber.

Compared with the background technology, the premixer has the following beneficial effects:

when the fan rotational speed is lower, the flow of mixed gas is little to pressure to the float is little, and the float supports tightly at the first side wall of adapter sleeve under the effect of elastic component, makes the ventilation hole communicate with holding the chamber through the through-hole. When the rotational speed of the blower increases, the flow rate of the mixed gas becomes large, and the pressure to the float increases. As the mixed gas increases, the float gradually squeezes the elastic member until the float is separated from the first side wall of the adapter sleeve and forms an opening gap, so that the vent hole is completely opened, i.e., the vent hole is directly communicated with the accommodating cavity. Because the flow passage sectional area of the premixer is variable in the application, the flow variation range of the mixed gas is larger, larger load variation is realized, and the load ratio of the premixer is improved.

In one embodiment, the float comprises a floating plate, the through hole is formed in the floating plate, the floating plate is movably arranged in the accommodating cavity to be abutted against or separated from the first side wall, and the floating plate and the peripheral side cavity wall of the accommodating cavity are arranged at intervals.

In one embodiment, the adapter sleeve comprises:

the accommodating cavity is arranged in the cylinder;

the cover plate is detachably arranged in the cylinder body, the vent holes are formed in the cover plate, and the floating plate can be abutted against or separated from the cover plate.

In one embodiment, a first guide rod is arranged on a first side of the floating plate along the plate thickness direction of the floating plate, and the first guide rod is arranged in the cover plate in a sliding penetrating manner; and/or the floating plate is provided with a second guide rod along a second side of the plate thickness direction, and the second guide rod is arranged in a second side wall of the cylinder body opposite to the cover plate in a sliding manner.

In one embodiment, the elastic piece is sleeved on the second guide rod, one end of the elastic piece abuts against the second side of the floating plate, and the other end of the elastic piece abuts against the second side wall of the cylinder.

In one embodiment, the second side wall of the cylinder is provided with a first limit groove, the second side of the floating plate is provided with a second limit groove, and two ends of the elastic piece extend into and abut against the first limit groove and the second limit groove respectively.

In one embodiment, the cross section of the first guide bar and/or the second guide bar is a non-circular cross section.

In one embodiment, the outer peripheral surface of the second guide rod is convexly provided with a guide key, and the guide key extends to two ends of the second guide rod along the axial direction.

In one embodiment, the cover plate includes:

a second body portion to which the vent hole is provided;

the second support arm is arranged in the ventilation hole, the second fixing sleeve is arranged on the second support arm, and the first guide rod is arranged in the second fixing sleeve in a sliding mode.

The second technical problem is solved by the following technical scheme:

the gas wall-mounted furnace comprises the premixer.

Compared with the background technology, the gas wall-mounted furnace has the following beneficial effects:

the flow cross-section area of the mixed gas is changed by adjusting the rotating speed of the fan, the flow change range of the mixed gas is enlarged, larger load change is realized, and the load ratio of the premixer of the wall-mounted furnace is improved.

Drawings

FIG. 1 is a schematic diagram of an assembled structure of a premixer and a blower provided by an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a premixer provided by an embodiment of the present utility model;

FIG. 3 is a schematic view of a structure of a premixer body according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of an adapter sleeve according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of a float provided in an embodiment of the present utility model.

The parts in the figures are named and numbered as follows:

1. a premixer body; 10. a mixing chamber; 11. a first premixer; 111. an air inlet; 112. a gas inlet; 12. a second premixer; 121. a first press ring;

2. an adapter sleeve; 21. a cylinder; 210. a receiving chamber; 211. a first body portion; 2110. a first seal groove; 212. a first support arm; 2120. a first limit groove; 213. a first fixing sleeve; 2131. trepanning; 2132. a guide groove; 214. a second press ring; 22. a cover plate; 220. a vent hole; 221. a second body portion; 222. a second support arm; 223. a second fixing sleeve;

3. a float; 30. a through hole; 31. a floating plate; 310. the second limit groove; 32. a first guide bar; 33. a second guide bar; 34. a guide key;

4. an elastic member; 5. a blower.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

The embodiment provides a gas hanging stove, has the premixer in the gas hanging stove, and outside air and gas get into the premixer and mix the back and carry to combustion system through the fan to realize heating etc..

The flow variation range of the mixed gas of the existing gas water heater is smaller, namely the load is smaller, and the diversified use requirements are difficult to meet.

In order to solve the above-mentioned needs, as shown in fig. 1 and 2, the present embodiment further proposes a premixer, which includes a premixer body 1, an adapter sleeve 2, a float 3 and an elastic member 4, and a mixing chamber 10 is disposed in the premixer body 1. The adapter sleeve 2 is arranged at the outlet end of the premixer main body 1 in a sealing way, a containing cavity 210 is arranged in the adapter sleeve 2, and the containing cavity 210 is used for communicating with the inlet of the fan 5. The first side wall of the adapter sleeve 2 facing the mixing cavity 10 is provided with a vent hole 220, and the mixing cavity 10 is communicated with the vent hole 220. The float 3 is provided with a through hole 30 and is movably disposed in the accommodating chamber 210. The floater 3 can be abutted against the inlet end of the adapter sleeve 2 through the elastic piece 4 so that the mixing cavity 10 is communicated with the accommodating cavity 210 through the through hole 30; alternatively, the float 3 is separated from the inlet end of the adapter sleeve 2 and forms an open gap so that the mixing chamber 10 and the receiving chamber 210 are also in communication through the open gap.

When the rotation speed of the fan 5 is low, the flow rate of the mixed gas is small, so that the pressure on the floater 3 is small, the floater 3 abuts against the first side wall of the adapter sleeve 2 under the action of the elastic piece 4, and the mixing cavity 10 is communicated with the containing cavity 210 only through the through hole 30. When the rotation speed of the blower 5 increases, the flow rate of the mixed gas becomes large, and the pressure against the float 3 increases. As the mixed gas increases, the float 3 gradually presses the elastic member 4 until the float 4 is separated from the first sidewall of the adapter sleeve 2 and an open gap is formed, so that the vent hole 220 is completely opened, i.e., the vent hole 220 is directly communicated with the receiving chamber 210. Because the flow passage area of the premixer is variable in the application, the flow variation range of the mixed gas is larger, larger load variation is realized, and the load ratio of the premixer is improved. The gas hanging stove changes the flow cross-section area of the mixed gas by adjusting the rotating speed of the fan 5, increases the flow change range of the mixed gas, and improves the load ratio of the premixer of the hanging stove.

In one of the embodiments, the premixer body 1 comprises a first premixer 11 and a second premixer 12, the first premixer 11 having an air inlet 111 and a gas inlet 112. The second premixer 12 is disposed in the first premixer 11 and has a mixing chamber 10, and an air inlet 111 and a gas inlet 112 are respectively communicated with the mixing chamber 10.

As shown in fig. 2 and 3, the second premixer 12 is installed inside the first premixer 11, the inner cavity of the second premixer 12 is the mixing cavity 10, and the external air directly enters the mixing cavity 10 through the air inlet 111. An annular cavity is defined between the outer wall of the second premixer 12 and the inner wall of the first premixer 11, and the annular cavity is communicated with the mixing cavity 10 through a notch of the second premixer 12. The external fuel gas enters the annular cavity through the fuel gas inlet 112 and then enters the mixing cavity 10 through the notch of the second premixer 12 so that the air and the fuel gas are fully mixed according to a preset ratio.

In one embodiment, as shown in fig. 2 and 3, the first premixer 11 is screwed with the adapter sleeve 2 and the second premixer 12 is abutted against the inlet end of the adapter sleeve 2. When the first premixer 11 is in threaded connection with the adapter sleeve 2, a first compression ring 121 is circumferentially arranged on the side surface of the second premixer 12 facing the adapter sleeve 2, a first sealing groove 2110 is correspondingly formed in the inlet end of the adapter sleeve 2, and a sealing ring is arranged in the first sealing groove 2110. When the second premixer 12 is abutted against the inlet end of the adapter sleeve 2, the first compression ring 121 stretches into the first seal groove 2110 to compress the seal ring, so that the sealing installation of the premixer main body 1 and the adapter sleeve 2 is realized, the leakage of mixed gas is avoided, and the safety of the premixer is improved.

As shown in fig. 2, the float 3 includes a floating plate 31, the floating plate 31 is provided with a through hole 30, the floating plate 31 is movably disposed in the accommodating cavity 210 to abut against or separate from the first side wall, and the floating plate 31 is disposed at intervals with the peripheral side cavity wall of the accommodating cavity 210. When the vent hole 220 is blocked by the floating plate 31, the cross-sectional area of the mixed gas passing through the vent hole 220, i.e., the opening area of the through hole 30 on the floating plate 31 is reduced. When the floating plate 31 is separated from the first sidewall of the adapter sleeve 2, the vent hole 220 is completely opened, increasing the cross-sectional area of the mixed gas passing through the vent hole 220, i.e., the open area of the vent hole 220.

As shown in fig. 2 and 4, the adapter sleeve 2 includes a cylinder 21 and a cover plate 22, and a receiving cavity 210 is formed in the cylinder 21. The cover plate 22 is detachably disposed in the cylinder 21. Vent holes 220 are provided in the cover plate 22. The float 3 can be pressed against or disengaged from the cover plate 22. When the float 3 is separated from the cover plate 22, an opening gap is formed between the float 3 and the cover plate 22 to completely open the vent hole 220.

In one embodiment, the cover plate 22 is fixedly mounted in the accommodating cavity 210 by means of bolts or threads, and is close to the inlet end of the adapter sleeve 2. The cover plate 22 plays a limiting role on the floater 3, and the elastic piece 4 drives the floater 3 to be abutted against the cover plate 22, so that the mixing cavity 10, the ventilation hole 220, the through hole 30 and the containing cavity 210 are sequentially communicated. When the rotational speed of the blower 5 increases, the pressure of the mixed gas to the float 3 is greater than the elastic force of the elastic member 4, the float 3 compresses the elastic member 4 and moves in a direction away from the cover plate 22, and at this time, the float 3 is separated from the cover plate 22, so that the vent hole 220 is directly communicated with the accommodating chamber 210.

In one embodiment, the floating plate 31 is provided with a first guide rod 32 along a first side in a plate thickness direction thereof, and the first guide rod 32 is slidably disposed through the cover plate 22; and/or the floating plate 31 is provided with a second guide rod 33 along a second side in the plate thickness direction thereof, the second guide rod 33 being slidably disposed through a second side wall of the cylinder 21 opposite to the cover plate 22. The first guide rod 32 and the second guide rod 33 can guide the reciprocating movement of the floating plate 31 in the accommodating cavity 210, so as to avoid the position deviation in the moving process of the floating plate 31.

In one embodiment, as shown in fig. 5, a first side of the floating plate 31 is provided with a first guide bar 32 and a second side is provided with a second guide bar 33. From other embodiments, the floating plate 31 may be provided with a first guide bar 32 only on a first side thereof or a second guide bar 33 only on a second side of the floating plate 31.

In one embodiment, as shown in fig. 2 and 5, the floating plate 31 is a circular plate, and the diameter of the floating plate 31 is larger than the diameter of the vent hole 220 and smaller than the outer diameter of the cover plate 22. When the floating plate 31 abuts against the cover plate 22, the mixed gas applies pressure to a portion of the floating plate 31 exposed to the inside of the vent hole 220. The floating plate 31 is provided with a plurality of through holes 30 along the circumferential direction. The number of the through holes 30 and the size of the openings need to be adaptively set according to the flow cross-sectional area of the mixed gas, and are not particularly limited herein.

In one embodiment, as shown in fig. 4, the cover 22 includes a second main body 221, a second supporting arm 222, and a second fixing sleeve 223, and the second main body 221 is provided with a vent hole 220. The second supporting arm 222 is disposed in the ventilation hole 220, the second fixing sleeve 223 is disposed on the second supporting arm 222, and the first guide rod 32 is slidably disposed in the second fixing sleeve 223. The second body 221 is an annular plate, the second support arms 222 extend to the inner walls of the vent holes 220 along the radial direction of the vent holes 220, and the second fixing sleeves 223 are disposed coaxially with the vent holes 220. The vent hole 220 is formed between the second body part 221 and the second fixing sleeve 223, and the vent hole 220 is divided into two parts having the same area by the second support arm 222. The first guide rod 32 movably penetrates through the second fixing sleeve 223 to play a role in guiding and limiting the movement of the floating plate 31.

In one embodiment, as shown in fig. 2 and 4, the cylinder 21 includes a first body portion 211, a first support arm 212, and a first fixing sleeve 213, and the first body portion 211 has a receiving cavity 210 therein. The first support arm 212 is disposed on the first main body 211, and the first support arm 212 is disposed opposite to the cover 22, such that the inner side of the cover 22 forms a first sidewall of the adapter sleeve 2, and the inner side of the first support arm 212 forms a second sidewall of the adapter sleeve 2. The first fixing sleeve 213 is disposed on the first support arm 212, and the second guide rod 33 movably penetrates through the sleeve hole 2131 of the first fixing sleeve 213, so as to further play a guiding and limiting role on the movement of the floating plate 31, and avoid the position deviation in the moving process of the floating plate 31.

The elastic member 4 in this embodiment is a spring, which is inexpensive and easy to obtain and is convenient to install. Of course, in other embodiments, the elastic member 4 may have other elastic structures, which are not limited herein.

In one embodiment, as shown in fig. 2, the elastic member 4 is sleeved on the second guide rod 33, and one end of the elastic member 4 abuts against the second side of the floating plate 31, and the other end of the elastic member 4 abuts against the second side wall of the cylinder 21. The first limit groove 2120 is formed in the second side wall (the first support arm 212) of the cylinder 21, the second limit groove 310 is formed in the second side of the floating plate 31, and two ends of the elastic piece 4 extend into and abut against the first limit groove 2120 and the second limit groove 310 respectively, so that the installation stability of the elastic piece 4 is realized.

Further, the cross section of the first guide bar 32 and/or the second guide bar 33 is a non-circular cross section, so as to avoid the float 3 rotating around the axis thereof, and improve the stability and reliability of avoiding the float 3 from moving.

In one embodiment, the outer peripheral surface of the second guide bar 33 is provided with a guide key 34 in a protruding manner, and the guide key 34 extends to both ends of the second guide bar 33 in the axial direction thereof. The first fixing sleeve 213 is internally provided with a guide groove 2132 communicated with the sleeve hole 2131 in a penetrating way along the axial direction, and the guide key 34 is in sliding fit with the guide groove 2132, so that the circumferential limit of the floating plate 31 is realized.

As shown in fig. 2 and 4, a second compression ring 214 is circumferentially arranged at the outlet end of the cylinder 21, and a second sealing groove (not shown in the drawings) is correspondingly arranged at a port of the fan 5, which is in butt joint with the cylinder 21. The outlet end of the cylinder 21 is in threaded connection with the fan 5, a sealing ring is arranged in the second sealing groove, and the second pressing ring 214 stretches into the second sealing groove to tightly press the sealing ring, so that the sealing installation of the cylinder 21 and the fan 5 is realized, the leakage of mixed gas is avoided, and the safety of the premixer is improved.

The above embodiments merely illustrate the basic principle and features of the present utility model, and the present utility model is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. A premixer, comprising:

the mixer comprises a mixer main body (1), wherein a mixing cavity (10) is formed in the mixer main body (1);

the adapter sleeve (2) is arranged at the outlet end of the premixer main body (1) in a sealing way, a containing cavity (210) is formed in the adapter sleeve (2), and the containing cavity (210) is used for being communicated with the inlet of the fan (5); a vent hole (220) is formed in the adapter sleeve (2) towards the first side wall of the mixing cavity (10), and the mixing cavity (10) is communicated with the vent hole (220);

the float (3) is provided with a through hole (30) and is movably arranged in the accommodating cavity (210); the float (3) can be abutted against the first side wall through the elastic piece (4) so that the vent hole (220) is communicated with the accommodating cavity (210) through the through hole (30); and the float (3) can be disengaged from the first side wall so that the vent (220) is fully open and directly communicates with the containing cavity (210).

2. Premix according to claim 1, characterized in that the float (3) comprises a floating plate (31), the through hole (30) is arranged in the floating plate (31), the floating plate (31) is movably arranged in the accommodating cavity (210) so as to be abutted against or separated from the first side wall, and the floating plate (31) is arranged at intervals with the peripheral side cavity wall of the accommodating cavity (210).

3. A premixer according to claim 2, wherein the adapter sleeve (2) comprises:

the accommodating cavity (210) is arranged in the cylinder;

the cover plate (22), cover plate (22) detachably set up in the barrel, ventilation hole (220) set up in cover plate (22), floating plate (31) can support tightly or break away from cover plate (22).

4. A premixer according to claim 3, wherein the floating plate (31) is provided with a first guide rod (32) along a first side in a plate thickness direction thereof, the first guide rod (32) being slidably provided in the cover plate (22); and/or, the floating plate (31) is provided with a second guide rod (33) along a second side of the plate thickness direction, and the second guide rod (33) is arranged in a sliding penetrating manner in a second side wall of the cylinder body opposite to the cover plate (22).

5. Premix according to claim 4, characterized in that the elastic element (4) is sleeved on the second guide rod (33), one end of the elastic element (4) is abutted against the second side of the floating plate (31), and the other end of the elastic element (4) is abutted against the second side wall of the cylinder.

6. The premixer of claim 5, wherein a first limiting groove (2120) is formed in the second side wall of the cylinder, a second limiting groove (310) is formed in the second side of the floating plate (31), and two ends of the elastic piece (4) extend into and abut against the first limiting groove (2120) and the second limiting groove (310) respectively.

7. Premix according to claim 4, characterized in that the cross section of the first guide bar (32) and/or the second guide bar (33) is a non-circular cross section.

8. Premix according to claim 7, characterized in that the outer circumferential surface of the second guide bar (33) is provided with protruding guide keys (34), which guide keys (34) extend to both ends of the second guide bar (33) in the axial direction thereof.

9. Premix according to claim 4, characterized in that the cover plate (22) comprises:

a second body part (221) to which the vent hole (220) is provided;

the second support arm (222) and the second fixed sleeve (223), the second support arm (222) set up in the ventilation hole (220), the second fixed sleeve (223) set up in on the second support arm (222), first guide arm (32) slip wears to locate in the fixed sleeve of second (223).

10. A gas wall-hanging stove, characterized by comprising a premixer according to any one of claims 1 to 9.