Full-premixing burner assembly with gas collection buffer cavity and gas heating water heater
By designing a gas collection buffer cavity on the burner door, the problems of flameout and backfire during the switching from high-fire to low-fire in the fully premixed burner were solved, thereby improving the stability and thermal efficiency of the burner.
Patent Information
- Application Number
- CN202520142610.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-22
AI Technical Summary
The lack of a buffer structure in the mixed gas flow channel design of the fully premixed burner makes it prone to flameout, backfire or flameout during the switching from high flame to low flame, affecting combustion stability and thermal efficiency.
Add a gas collection buffer cavity to the burner door, making its cross-sectional area 2-5 times that of the gas inlet channel, to provide buffer space to regulate the gas flow rate and ensure a stable supply of mixed gas when switching from high flame to low flame.
It effectively avoids flameout and backfire during the transition from high flame to low flame, improves combustion stability and thermal efficiency, and reduces whistling noise under low load conditions.
Smart Images
Figure CN223755363U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to burner assembly technical field, concretely relates to a full premix burner assembly with gas collecting buffer cavity and gas heating water heater. BACKGROUND
[0002] The full premix burner mixes the gas and air according to certain proportion under the joint action of the gas valve, the fan and the premixer before the gas is ignited and burned, and the mixed gas is sent into the burner channel under the action of the fan and then into the burner cylinder for ignition and burning.
[0003] The full premix burner has obvious advantages over the conventional atmospheric burner in full combustion, high thermal efficiency, low CO and NOx compound emission, etc. SUMMARY
[0004] To overcome the defects of the prior art, one of the purposes of the utility model is to provide a full premix burner assembly with gas collecting buffer cavity to solve the above-mentioned traditional problems.
[0005] The second purpose of the utility model is to provide a gas heating water heater using the full premix burner assembly with gas collecting buffer cavity.
[0006] One of the purposes of the utility model is achieved by the following technical scheme:
[0007] A full premix burner assembly with gas collecting buffer cavity comprises a burner door, the burner door comprises a cover body, a gas inlet channel, a gas collecting buffer cavity and a gas outlet, the gas inlet channel is communicated with the gas collecting buffer cavity and the gas outlet to form an L-shaped gas flow structure, the cross-sectional area of the gas collecting buffer cavity is 2-5 times of the cross-sectional area of the gas inlet of the gas inlet channel, and the gas outlet is arranged at the central part of the cover body.
[0008] Preferably, the cross-sectional area of the gas collecting buffer cavity is 3-4 times of the cross-sectional area of the gas inlet of the gas inlet channel.
[0009] Preferably, the gas collecting buffer cavity comprises a first end and a second end, the first end is communicated with the gas inlet of the gas inlet channel, the second end is communicated with the gas outlet, and the gas collecting buffer cavity is gradually increased from the first end to the second end.
[0010] Preferably, the cross-sectional area of the second end is equal to the cross-sectional area of the gas outlet.
[0011] Preferably, the burner door is further provided with a circular annular notch and a plurality of mounting ears, a sealing ring is mounted on the circular annular notch, and the mounting ears cooperate with the sealing ring to work.
[0012] Preferably, the full premix burner assembly further comprises a burner, the gas outlet is outwardly protrudingly arranged from the burner door, the burner is provided with a flange plate, and the flange plate is connected with the gas outlet.
[0013] Preferably, the full premix burner assembly further comprises a sealing gasket arranged between the flange plate and the gas outlet.
[0014] Preferably, the full premix burner assembly further comprises heat insulation cotton with a stepped through hole, the burner door is further provided with a plurality of stretching columns and screws, the heat insulation cotton is sleeved on the burner and is sealingly connected with the burner door through the stretching columns and the screws.
[0015] Preferably, the full premix burner assembly further comprises an ignition needle and a temperature detection probe, the burner door is further provided with a first mounting position, a second mounting position and a fire observation window, the first mounting position is used for mounting the ignition needle, and the second mounting position is used for mounting the temperature detection probe.
[0016] The second purpose of the utility model is achieved by the following technical scheme.
[0017] A gas heating water heater comprises the full premix burner assembly with gas collecting buffer cavity.
[0018] Compared with the prior art, the full premix burner assembly has the advantages that:
[0019] The full premix burner assembly has the advantages that: the gas collecting and buffering cavity is added to the burner door, and the volume of the gas collecting and buffering cavity is larger than that of the gas inlet channel; when the combustible mixed gas enters the gas collecting and buffering cavity from the gas inlet channel, the flow rate is reduced and the gas fills the gas collecting and buffering cavity; thus, the gas collecting and buffering cavity has more space to store a part of the mixed gas, and the flow rate of the mixed gas under the large fire state is reduced, so that the phenomenon of flameout is avoided; when the large fire is switched to the small fire, the flow rate of the mixed gas is reduced due to the reduction of the rotating speed of the fan; because the volume of the gas collecting and buffering cavity is larger than that of the gas inlet channel, a part of the mixed gas is stored in the gas collecting and buffering cavity, and the mixed gas in the gas collecting and buffering cavity can provide gas supplement for the switching process, so that the stable combustion transition of the small fire is maintained; the problem of backfire or even flameout of the traditional burner door during the switching process from the large fire to the small fire is solved, and the howling noise during the combustion process under the small load state is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 FIG. 1 is a structural schematic diagram of a full premix burner assembly according to the present application;
[0021] Figure 2 FIG. 2 is an exploded view of the full premix burner assembly shown in FIG. 1, wherein an ignition needle and a temperature detection probe are not shown; Figure 1
[0022] FIG. 3 is a perspective structural schematic diagram of a burner door shown in FIG. 1; Figure 3 Figure 1 FIG. 4 is a front structural schematic diagram of the burner door shown in FIG. 3;
[0023] Figure 4 Figure 3 FIG. 5 is a back structural schematic diagram of the burner door shown in FIG. 3;
[0024] Figure 5 FIG. 6 is a sectional view of A-A shown in FIG. 3. Figure 3
[0025] Figure 6 Figure 5
[0026] In the drawings: 10, burner door; 11, cover main body; 12, gas inlet channel; 13, gas collecting and buffering cavity; 14, circular ring-shaped notch; 15, mounting ear; 16, stretching column; 20, burner; 30, heat insulation cotton; 40, sealing gasket.DETAILED DESCRIPTION
[0027] For the above purposes, features and advantages of the present application to be more apparent and understandable, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a number of specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners other than those described herein, and it is understood that similar modifications of this nature can be made by those skilled in the art, without departing from the spirit and scope of the present application, therefore, the present application is not limited to the specific embodiments disclosed below.
[0028] In the description of the present application, it is understood that the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.
[0029] In the description of the present application, it is understood that when an element is considered to be "connected" to another element, it can be directly connected to another element or there can be intermediate elements. In contrast, when the element is referred to as "directly" connected to another element, there is no intermediate element.
[0030] Please refer to Figures 1-6 The full premix burner assembly with gas collecting buffer cavity is used for installing in a gas heating water heater, for stable combustion, to improve the safety performance of the equipment, specifically, the full premix burner assembly includes a burner door 10, the burner door 10 includes a cover main body 11, a gas inlet channel 12, a gas collecting buffer cavity 13 and a gas outlet, wherein the gas inlet channel 12 is communicated with the gas collecting buffer cavity 13 and the gas outlet to form an L-shaped gas flow structure, the cross-sectional area of the gas collecting buffer cavity 13 is 2-5 times of the cross-sectional area of the gas inlet of the gas inlet channel 12, and the gas outlet is arranged at the central part of the cover main body 11.
[0031] In the above structure, the gas collecting buffer cavity 13 is added to the burner door 10. In the large fire state, the volume of the gas collecting buffer cavity 13 is large, and the cross section of the gas collecting buffer cavity 13 is larger than that of the gas inlet channel 12. When the combustible gas enters the gas collecting buffer cavity 13 from the gas inlet channel 12, the flow rate is reduced, and the combustible gas fills the gas collecting buffer cavity 13. Thus, the gas collecting buffer cavity 13 has more space to store a part of the mixed gas, and the flow rate of the mixed gas in the large fire state is reduced, so that the phenomenon of flameout is avoided. When the large fire is switched to the small fire, the flow rate of the mixed gas is reduced due to the reduction of the rotation speed of the fan. Since the volume of the gas collecting buffer cavity 13 is larger than that of the gas inlet channel 12, a part of the mixed gas is stored in the gas collecting buffer cavity 13. During the switching process from the large fire to the small fire, the mixed gas in the gas collecting buffer cavity 13 can temporarily provide combustible gas to maintain stable combustion of the small fire. The problem of backfire or even flameout of the traditional burner door 10 during the switching process from the large fire to the small fire is solved, and the howling noise during the combustion process in the small load state is reduced.
[0032] In one embodiment, the cross-sectional area of the gas collecting buffer cavity 13 is 3-4 times, such as 3 times, 3.5 times, 4 times, etc., the cross-sectional area of the gas inlet of the gas inlet channel 12. The cross-sectional area of the gas collecting buffer cavity 13 is selected according to the specific burner 20.
[0033] In the embodiment, the gas collecting buffer cavity 13 includes a first end and a second end. The first end is in communication with the gas inlet of the gas inlet channel 12, and the second end is in communication with the gas outlet. The gas collecting buffer cavity 13 gradually increases from the first end to the second end, so that the mixed gas can be supplied rapidly while being buffered in the gas collecting buffer cavity 13. The gas can be mixed again in the cavity, and the combustible gas and air can be mixed more uniformly. In other embodiments, corresponding structures can be configured according to specific requirements, which are not described here. Optionally, the cross-sectional area of the second end is equal to the cross-sectional area of the gas outlet, so as to stabilize the gas pressure between the gas collecting buffer cavity 13 and the burner 20.
[0034] In other embodiments, the burner door 10 is also provided with a circular slot 14 and a plurality of mounting ears 15. The circular slot 14 is provided with a sealing ring (not shown), and the mounting ears 15 cooperate with the sealing ring to work. When the burner door 10 is connected with the heat exchanger, the sealing ring plays a sealing role, and the burner door 10 is sealed and connected with the heat exchanger through bolts.
[0035] In one embodiment, the full premix burner assembly further comprises a burner 20, the gas outlet is outwardly protruding from the burner door 10, the burner 20 is provided with a flange plate, the flange plate is connected with the gas outlet, so that the burner 20 is sealingly connected with the burner door 10. Optionally, the full premix burner assembly further comprises a sealing gasket 40, the sealing gasket 40 is arranged between the flange plate and the gas outlet, and is fixed by bolts or other means.
[0036] In this embodiment, the full premix burner assembly further comprises a heat insulation cotton 30 with a stepped through hole, the burner door 10 is further provided with a plurality of stretching columns 16 and screws, the heat insulation cotton 30 is sleeved on the burner 20 and is sealingly connected with the burner door 10 through the stretching columns 16 and the screws, so as to insulate and keep warm and reduce heat dissipation.
[0037] In this embodiment, the full premix burner assembly further comprises an ignition needle and a temperature detection probe, the burner door 10 is further provided with a first mounting position and a second mounting position and a fire observation window, the first mounting position is used for mounting the ignition needle, and the second mounting position is used for mounting the temperature detection probe.
[0038] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combination of the technical features does not exist contradictory, it should be considered that it is within the scope of the present application.
[0039] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it should not be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.
Claims
1. A full premix burner assembly with a gas collecting buffer chamber, characterized in that, The burner door comprises a cover body, a gas inlet channel, a gas collection buffer cavity and a gas outlet, the gas inlet channel is communicated with the gas collection buffer cavity and the gas outlet to form an L-shaped gas flow structure, the cross-sectional area of the gas collection buffer cavity is 2-5 times of the cross-sectional area of the gas inlet of the gas inlet channel, and the gas outlet is arranged at the central part of the cover body.
2. The full-premix combustor assembly with plenum buffer cavity of claim 1, wherein, The cross-sectional area of the gas collection buffer cavity is 3-4 times of the cross-sectional area of the gas inlet of the gas inlet channel.
3. The full-premix combustor assembly with plenum buffer cavity of claim 1, wherein, The gas collection buffer cavity comprises a first end and a second end, the first end is communicated with the gas inlet of the gas inlet channel, the second end is communicated with the gas outlet, and the cross-sectional area of the gas collection buffer cavity gradually increases from the first end to the second end.
4. The full-premix combustor assembly with plenum buffer cavity of claim 3, wherein, The cross-sectional area of the second end is equal to the cross-sectional area of the gas outlet.
5. The full-premix combustor assembly with plenum buffer cavity of claim 1, wherein, The burner door is further provided with a circular annular notch and a plurality of mounting ears, a sealing ring is mounted on the circular annular notch, and the mounting ears cooperate with the sealing ring to work.
6. The full-premix combustor assembly with plenum buffer cavity of claim 1, wherein, The full premix burner assembly further comprises a burner, the gas outlet is outwardly and protrudingly arranged from the burner door, the burner is provided with a flange plate, and the flange plate is connected with the gas outlet.
7. The full-premix combustor assembly with plenum buffer cavity of claim 6, wherein, The full premix burner assembly further comprises a sealing gasket arranged between the flange plate and the gas outlet.
8. The full-premix combustor assembly with plenum buffer cavity of claim 6, wherein, The full premix burner assembly further comprises heat insulation cotton with a stepped through hole, the burner door is further provided with a plurality of stretching columns and screws, the heat insulation cotton is sleeved on the burner and is sealingly connected with the burner door through the stretching columns and the screws.
9. The full-premix combustor assembly with plenum buffer cavity of claim 6, wherein, The full premix burner assembly further comprises an ignition needle and a temperature detection probe, the burner door is further provided with a first mounting position, a second mounting position and a fire observation window, the first mounting position is used for mounting the ignition needle, and the second mounting position is used for mounting the temperature detection probe.
10. A combination gas fired central heating and water heating appliance, characterised in that, The full premix burner assembly with the gas collection buffer cavity comprises the burner door according to any one of claims 1-9.