CN220911449U - Premixing device and gas heating water heater - Google Patents

Abstract

The utility model discloses a premixer and a gas heating water heater, wherein the premixer comprises a premixer main body, an air inlet connector and an adjusting baffle plate, the premixer main body is provided with a mixing cavity and a gas inlet connector, the air inlet connector is inserted into the premixer main body and forms a gas inlet communication channel, the gas inlet communication channel is communicated with the mixing cavity, and one end of the air inlet connector, which is close to the gas inlet communication channel, is provided with a mounting hole and a limiting rod; the adjusting baffle is installed on the mounting hole, and the adjusting baffle includes the portion of keeping out the wind and keeps off the gas portion. According to the premixer, the adjusting baffle is additionally arranged, so that the gas and the air entering the mixing cavity can be adjusted, the adjusting baffle can realize overturning action according to the air flow size and the gravity of the adjusting baffle, the adjusting ratio is higher, the heating stove can operate with lower heat load, the reasonable combustion proportion is adopted, the energy and the gas are saved after long-term use, the problem of sudden cold and sudden hot in summer can be solved, and the temperature is controlled more accurately.

Description

Premixing device and gas heating water heater

Technical Field

The utility model relates to the technical field of premixers, in particular to a premixer and a gas heating water heater.

Background

Before the gas is combusted, negative pressure is generated in the premixer by the rotation of a fan, air in the heating stove is sucked into the premixer, and meanwhile, the gas proportional valve opens the gas to enter the premixer; the gas and the air are fully premixed in the premixer according to the proportion. The full premix burner is not limited by mixing time and mixing space, has the advantages of high combustion speed, full combustion, less discharge of nitrogen oxide compounds, low noise and the like, and is increasingly applied, especially on condensing water heaters and condensing heating furnaces.

The existing premixer has the following defects: 1. in general, a gas inlet is arranged in the premixer, and gas enters a mixing cavity in the premixer from the gas inlet to be mixed with air, but the mixing proportion between the gas and the air is difficult to accurately adjust, the mixing proportion between the gas and the air is easy to be unreasonable when the gas and the air are high and low, so that insufficient combustion is caused, and particularly, the conditions such as flameout or deflagration are easy to occur when the premixer is operated in a full load state or a low load state, so that unstable combustion is caused; 2. the adjustment range of the existing premixer is smaller, generally 1: about 5, the power of the small fire is relatively high, unnecessary gas flow is increased, the temperature control effect is poor, the heating temperature is high, the bathing effect is affected, and therefore the experience of the product is poor.

Disclosure of utility model

In order to overcome the defects of the prior art, one of the purposes of the utility model is to provide a premixer which solves the traditional problems, and the premixer is provided with an adjustable turning plate in the premixer, so that the adjusting ratio is higher, the defects of the existing premixer can be overcome, meanwhile, the energy and gas can be saved, the small fire is more obvious, and the premixer has the advantages of lower small fire load, accurate temperature control, more comfortable bathing in summer and the like.

The second purpose of the utility model is to provide a gas heating water heater adopting the premixer.

One of the purposes of the utility model is realized by adopting the following technical scheme:

The premixer comprises a premixer main body, an air inlet connector and an adjusting baffle plate, wherein the premixer main body is provided with a mixing cavity and a gas inlet connector, the air inlet connector is inserted into the premixer main body and forms a gas inlet communication channel, the gas inlet communication channel is communicated with the mixing cavity, and one end, close to the gas inlet communication channel, of the air inlet connector is provided with a mounting hole and a limiting rod; the adjusting baffle is arranged on the mounting hole and comprises a wind shielding part and a gas blocking part, the wind shielding part is used for adjusting the air inlet flow of the air inlet joint, and the gas blocking part is used for adjusting the gas inlet flow of the gas inlet communication channel; the adjusting baffle is provided with a first position and a second position, the adjusting baffle can move between the first position and the second position according to the air flow size and self gravity, and when the adjusting baffle is at the second position, the wind shielding part is abutted to the limiting rod.

Preferably, an angle formed between the wind shielding part and the air shielding part is an obtuse angle.

Preferably, the angle formed between the wind shielding part and the air shielding part is 120-170 degrees.

Preferably, the area of the wind shielding part is 20% -50% of the cross section of the air inlet hole circle of the air inlet joint.

Preferably, the air inlet connector is further provided with an avoidance notch, and when the adjusting baffle is at the first position, the air blocking part is accommodated in the avoidance notch.

Preferably, the adjusting baffle further comprises a rotating part, a telescopic shaft is arranged on the rotating part and used for being arranged on the mounting hole, and the adjusting baffle is enabled to move between the first position and the second position according to the air flow size and the self gravity.

Preferably, the air inlet connector is provided with a horn-shaped air inlet cavity, a plurality of protrusions which are abutted against the device body are arranged on one side of the air inlet cavity, and a plurality of gas adjusting holes communicated with the gas inlet communication channels are formed in gaps between the adjacent protrusions.

Preferably, the width of the gas blocking part is adapted to the width of the gas regulating hole.

Preferably, the outer wall of the device main body is provided with a positioning column, the outer wall of the air inlet joint is provided with a positioning groove, the positioning column is sleeved in the positioning groove and fixed through a screw, a sealing ring is further arranged between the device main body and the air inlet joint, and the sealing ring is an O-shaped ring.

The second purpose of the utility model is realized by adopting the following technical scheme:

The gas heating water heater comprises the premixer.

Compared with the prior art, the utility model has the beneficial effects that:

According to the premixer, the adjusting baffle plate is additionally arranged, so that the adjusting baffle plate can adjust the gas and the air entering the mixing cavity, and the adjusting baffle plate can realize overturning action according to the air flow size and the self gravity, so that the adjusting ratio is higher, and when the heating furnace runs on a big fire, the adjusting baffle plate is completely opened in a full-open state due to the fact that the rotating speed of the fan is high and the generated negative pressure is larger, and can run under the maximum load; when the heating stove operates on small fire, the regulating baffle is in a closed state due to the fact that the rotating speed of the fan is low, the air inlet and the gas outlet are blocked by the gravity of the baffle, the regulating ratio of the small fire can be wider, the heating stove can operate with lower heat load, reasonable combustion proportion is adopted, long-term use is more energy-saving and gas-saving, meanwhile, the problem of sudden cold and sudden heat in summer can be solved, and the control temperature is more accurate.

Drawings

FIG. 1 is a schematic view showing a structure of a premixer of the present utility model mounted on a heat exchanger of a gas heating water heater;

FIG. 2 is a schematic view of the structure of the premixer shown in FIG. 1;

FIG. 3 is an exploded view of the premixer shown in FIG. 2;

FIG. 4 is a cross-sectional view of the premixer shown in FIG. 2, with gas, air flow conditions identified;

FIG. 5 is a schematic perspective view of the air intake fitting shown in FIG. 3;

FIG. 6 is a front view of the air intake fitting shown in FIG. 5;

FIG. 7 is a cross-sectional view of the air intake fitting shown in FIG. 5;

FIG. 8 is a schematic perspective view of the adjustment baffle of FIG. 3;

FIG. 9 is a side view of the adjustment baffle of FIG. 8;

FIG. 10 is a view of the closing of the adjustment flap within the air intake fitting;

FIG. 11 is a semi-open state of the adjustment flap within the air intake fitting;

Fig. 12 is a fully open state of the adjusting shutter in the intake joint.

In the figure: 10. an instrument body; 11. a mixing chamber; 12. a gas inlet port; 13. a mounting flange; 14. positioning columns; 20. an air inlet joint; 21. a mounting hole; 22. a limit rod; 23. an air inlet cavity; 24. a protrusion; 25. a positioning groove; 26. avoiding the notch; 30. adjusting a baffle; 31. a wind shielding part; 32. a gas blocking part; 33. a rotating part; 40. a seal ring; 50. a telescopic shaft; 60. a blower; 70. a burner assembly.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the description of the present utility model, it will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. In contrast, when an element is referred to as being "directly connected" to another element, there are no intervening elements present.

Referring to fig. 1-12, a premixer according to a preferred embodiment of the present utility model is used for being installed in a gas heating water heater, the gas heating water heater further comprises a fan 60 and a burner assembly 70, the premixer is connected with an air inlet of the fan 60, which can solve the disadvantages of the existing premixer, and meanwhile can save more energy and gas, is more obvious when the fire is small, and has the advantages of lower small fire load, accurate temperature control, more comfortable bathing in summer, etc. Specifically, the premixer comprises a premixer body 10, an air inlet connector 20 and an adjusting baffle 30, wherein the premixer body 10 is provided with a mixing cavity 11 and a gas inlet connector 12, the air inlet connector 20 is inserted into the premixer body 10 and forms a gas inlet communication channel, the gas inlet communication channel is communicated with the mixing cavity 11, and one end of the air inlet connector 20, which is close to the gas inlet communication channel, is provided with a mounting hole 21 and a limiting rod 22; the adjusting baffle 30 is installed on the installation hole 21, the adjusting baffle 30 comprises a wind shielding part 31 and a gas shielding part 32, the wind shielding part 31 is used for adjusting the air inlet flow of the air inlet joint, and the gas shielding part 32 is used for adjusting the gas inlet flow of the gas inlet communication channel; the adjusting baffle 30 has a first position and a second position, and the adjusting baffle 30 is movable between the first position and the second position according to the air flow and its own weight, and when the adjusting baffle 30 is in the second position, the wind shielding portion 31 abuts against the stop lever 22. It will be appreciated that the stop lever 22 is provided behind the mounting hole 21 (as seen in the direction of the air flow) so that the wind shielding portion 31 can be positioned under the stop of the stop lever 22 when the air flow is blown up.

The premixer is additionally provided with the adjusting baffle plate 30, so that the adjusting baffle plate 30 can adjust the gas and the air entering the mixing cavity 11, and the adjusting baffle plate 30 can realize overturning action according to the air flow size and the self gravity, so that the adjusting ratio is higher, and when the heating stove runs on a big fire, the adjusting baffle plate 30 is completely opened in a full-open state due to the high rotating speed of the fan and the large negative pressure generated when the heating stove runs on the big fire, and can run under the maximum load; when the heating stove is operated on small fire, the regulating baffle 30 is in a closed state due to the fact that the gravity of the baffle is lower, and part of air flow is blocked by the air inlet and the gas outlet, so that the regulating ratio of the small fire is wider, the heating stove can operate with lower heat load, reasonable combustion proportion is adopted, long-term use is more energy-saving and gas-saving, meanwhile, the problem of sudden cold and sudden hot in summer can be solved, and the control temperature is more accurate.

As shown in fig. 2-4, the main body 10 includes a mounting flange 13, an outer tube and an inner tube, the mixing chamber 11 is disposed in the inner tube, and is gradually enlarged along the air flow direction, so that air and fuel gas can be uniformly mixed in the mixing chamber 11, the fuel gas inlet port 12 is disposed on the outer tube, a fuel gas inlet communication channel is disposed between the outer tube and the inner tube, and between the outer tube and the air inlet joint 20, fuel gas enters from the fuel gas inlet port 12, flows into the mixing chamber 11 through the fuel gas inlet communication channel, and is fully mixed with air entering from the air inlet joint 20.

The air inlet connector 20 comprises a shell and an air inlet cavity 23, the air inlet cavity 23 is approximately in a horn shape, the air inlet cavity 23 is used for being inserted into an inner tube of the device main body 10 to form an air transition section, a section of cylindrical transition interface is arranged at an air inlet end, the purpose of enabling air entering the premixer to be in smooth transition is achieved, and noise caused by turbulent flow is avoided when ambient air enters the premixer.

In this embodiment, a plurality of protrusions 24 abutting against the main body 10 are provided on a side of the air intake chamber 23 facing the main body 10, and a plurality of gas adjustment holes communicating with the gas inlet communication passage are formed in gaps between adjacent protrusions 24. The number of gas adjusting holes is at least 4, namely, the gas enters the mixing cavity 11 through the gas adjusting holes. The outer wall of the device main body 10 is provided with a positioning column 14, the outer wall of the air inlet joint 20 is provided with a positioning groove 25, the positioning column 14 is sleeved in the positioning groove 25 and fixed through a screw, a sealing ring 40 is further arranged between the device main body 10 and the air inlet joint 20, and the sealing ring 40 is an O-shaped ring.

In some embodiments, the width of the gas blocking portion 32 is adapted to the width of the gas adjusting hole, that is, when the adjusting baffle 30 is in the first position, the gas blocking portion 32 may block the gas flow of one gas adjusting hole, or as the gas flow gradually increases, the adjusting baffle 30 may be pushed open, so that part of the gas may slowly flow out of the gas adjusting hole into the mixing chamber 11.

Referring to fig. 7 to 8, the angle formed between the wind shielding portion 31 and the air shielding portion 32 is an obtuse angle. The angle of the two is set to be proper according to the position of the gas regulating hole and the weight of the gas regulating hole. In one embodiment, the angle formed between the wind shielding part 31 and the air shielding part 32 is 120 ° -170 °. Preferably, the angle formed between the wind shielding portion 31 and the air shielding portion 32 is 162 °. In other embodiments, the wind shielding portion 31 is generally gradually reduced from bottom to top, that is, when approaching the air shielding portion 32, the width is the smallest, the area of the wind shielding portion 31 is 20% -50% of the cross section of the air inlet hole circle of the air inlet connector 20, that is, the air shielding area of the wind shielding portion 31 can be matched by designing the air inlet hole circle of the air inlet connector 20 and matching the aperture size of the gas adjusting hole, in general, the aperture size of the gas adjusting hole is matched with the air inlet hole circle of the air inlet connector 20, so that the air-fuel ratio in the mixing cavity 11 is better, but the difficulty of gas and air adjustment during small fire is overcome, and then the air shielding plate 30 is adjusted appropriately, so that the problem of sudden cold and hot in summer is solved.

As shown in fig. 4 and 5, the air inlet connector 20 is further provided with an avoidance notch 26, when the adjusting baffle 30 is at the first position, the air blocking portion 32 is accommodated in the avoidance notch 26, so that the adjusting baffle 30 can close the gas notch in the gas in a small fire state, and the effect of adjusting the air inlet and the air inlet of the small fire gas is achieved, so that the small fire can be adjusted to be higher by conforming to combustion.

As shown in fig. 3, the adjusting baffle 30 further includes a rotating portion 33, a telescopic shaft 50 is mounted on the rotating portion 33, and the telescopic shaft 50 is configured to be mounted on the mounting hole 21, and move the adjusting baffle 30 between the first position and the second position according to the airflow size and self gravity, so as to facilitate the assembly and disassembly of the adjusting baffle 30.

As shown in fig. 10, in the light fire state, the adjusting baffle 30 is in the first position, is in the closed state under the self gravity, and is accommodated in the avoiding notch 26, that is, the air blocking portion 32 blocks the air outlet flow of one of the gas adjusting holes, and the air blocking portion 31 blocks part of the air inlet flow, so that the adjustment of the air and the gas in the light fire state is realized.

As shown in fig. 11, in the medium fire state, the adjusting baffle 30 is in a half-open state, that is, between the first position and the second position, the tail end of the adjusting baffle 30 is far away from the air inlet joint 20 along with the increase of the rotation speed of the fan, so as to form an open state, and part of air and gas flow into the mixing cavity 11 from the opening, so that the air and gas in the mixing cavity 11 are gradually increased.

As shown in fig. 12, in the heavy fire state, the adjusting baffle 30 is in the fully opened state, i.e. in the second position, and is abutted against the limit rod 22, which is equivalent to that the adjusting baffle 30 has little adjusting effect on air and fuel gas, and the air and the fuel gas are mixed by the air-fuel ratio set by the premixer, so that uniform mixing and full combustion are realized.

Through the processes, the premixer can realize the adjustment of air and fuel gas, can solve the defects of the prior premixer, can save more energy and gas simultaneously, is more obvious when fired slightly, and has the advantages of lower firing load, accurate temperature control, more comfortable bathing in summer and the like.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The premixer is characterized by comprising a premixer main body, an air inlet connector and an adjusting baffle, wherein the premixer main body is provided with a mixing cavity and a gas inlet connector, the air inlet connector is inserted into the premixer main body and forms a gas inlet communication channel, the gas inlet communication channel is communicated with the mixing cavity, and one end of the air inlet connector, which is close to the gas inlet communication channel, is provided with a mounting hole and a limiting rod; the adjusting baffle is arranged on the mounting hole and comprises a wind shielding part and a gas blocking part, the wind shielding part is used for adjusting the air inlet flow of the air inlet joint, and the gas blocking part is used for adjusting the gas inlet flow of the gas inlet communication channel; the adjusting baffle is provided with a first position and a second position, the adjusting baffle can move between the first position and the second position according to the air flow size and self gravity, and when the adjusting baffle is at the second position, the wind shielding part is abutted to the limiting rod.

2. The premixer of claim 1, wherein the angle formed between the wind shielding portion and the air shielding portion is an obtuse angle.

3. The premixer of claim 2, wherein the angle formed between the wind shielding portion and the air shielding portion is 120 ° -170 °.

4. The premixer of claim 1, wherein the area of the wind shielding portion is 20% -50% of the cross section of the inlet hole circle of the inlet joint.

5. The premixer of claim 1, wherein the air inlet connector is further provided with an avoidance gap, and the air blocking portion is accommodated in the avoidance gap when the adjusting baffle is at the first position.

6. The premixer of claim 1, wherein the adjustment baffle further comprises a rotating portion on which a telescoping shaft is mounted for mounting on the mounting hole and moving the adjustment baffle between the first and second positions according to the magnitude of the airflow and its own weight.

7. The premixer of claim 1, wherein the air inlet connector has a horn-shaped air inlet chamber, a side of the air inlet chamber facing the burner body is provided with a plurality of protrusions abutting against the burner body, and gaps between adjacent protrusions form a plurality of gas regulating holes communicated with the gas inlet communication channel.

8. The premixer of claim 7, wherein the width of the baffle portion is adapted to the width of the gas adjustment orifice.

9. The premixer of claim 1, wherein a positioning column is arranged on the outer wall of the premixer body, a positioning groove is arranged on the outer wall of the air inlet joint, the positioning column is sleeved in the positioning groove and fixed by a screw, a sealing ring is further arranged between the premixer body and the air inlet joint, and the sealing ring is an O-shaped ring.

10. A gas fired heating water heater comprising a premixer according to any of claims 1-9.