Air supply mixing device and water heater

Abstract

The present invention provides an air supply mixing device and a water heater, and relates to the field of air supply mixing technology. The mixing device of the present invention includes a fan, the air outlet end of the fan is connected to a merging assembly and the two are connected to each other, the merging assembly is provided with an air inlet pipe for inputting gas, and the air outlet of the merging assembly is provided with a mixing assembly. Based on the technical solution of the present invention, the gas and air are pre-mixed at the rear end of the fan, and the gas does not pass through the fan during the entire process. The requirements for the sealing and electrical properties of the fan are low, and it is suitable for promotion; and the overall structure is simple and reliable, and can better mix the gas and air in proportion.

Description

Technical Field

[0001] The present invention relates to the technical field of air supply mixing, and in particular to an air supply mixing device and a water heater. Background Art

[0002] Fully premixed combustion technology is widely used in gas heating furnaces and gas water heaters. Gas premixing methods can be categorized as either front-end premixing or back-end premixing. The front-end premixing method requires high sealing, resulting in high fan production costs. It also places high demands on electrical safety, making it prone to ignition and fires. Summary of the Invention

[0003] In response to the above-mentioned problems in the prior art, this application proposes an air supply mixing device and a water heater, which realize pre-mixing of gas and air at the rear end of the fan. It has a simple structure, low cost, is suitable for promotion, and can better mix gas and air in proportion.

[0004] The air supply mixing device of the present invention includes a fan, the air outlet end of the fan is connected to a merging component and the two are communicated with each other, the merging component is provided with an air inlet pipe for inputting fuel gas, and the merging component is also provided with a mixing component located at the rear end of the air inlet pipe along the direction of air flow movement.

[0005] The gas and air merging and mixing components are both located at the rear end of the fan. Compared to pre-mixing at the front end of the fan, the gas does not pass through the fan, and the gas's path passes through fewer equipment structures and is shorter. Compared to pre-mixing at the front end of the fan, pre-mixing at the rear end of the fan places lower demands on the fan's sealing and electrical safety, has lower manufacturing costs, and is more suitable for widespread use. By setting up a merging component, gas and air can be input proportionally, and the gas and air are mixed by the mixing component. The mixing component is located inside the merging component, which further reduces the sealing requirements of the mixing and merging components compared to placing the mixing component outside the merging component.

[0006] In one embodiment, the merging assembly has a throat portion with a reduced inner diameter between the air inlet and the air outlet, and the air inlet pipe is disposed in the throat portion and communicates with a throat passage in the throat portion.

[0007] Through this embodiment, the air inlet end of the merging assembly is connected to the air outlet end of the fan. After the air enters the merging assembly, the pressure at the throat becomes smaller, generating an airflow phenomenon from the air inlet pipe to the merging assembly. Under this force, the gas smoothly enters the merging assembly. At the throat position, the air and gas merge and move together toward the air outlet end of the merging assembly, playing a role of preliminary mixing.

[0008] In one embodiment, the mixing assembly includes a diverter plate, which is positioned over the air outlet of the merging assembly and has multiple diverter holes. In this embodiment, the diverter plate, positioned over the air outlet of the merging assembly, assists in mixing. The diverter plate's diversion ensures a uniform mixture of gas and air entering the burner.

[0009] In one embodiment, the mixing assembly further comprises a spoiler, one end of which is connected to a surface of the diverter plate close to the interior of the merging assembly, and the other end of which extends toward the interior of the merging assembly.

[0010] According to this embodiment, the spoiler is used to stir the mixture of gas and air, thereby improving the mixing efficiency of gas and air.

[0011] In one embodiment, the spoiler is in a spiral shape that is twisted and rotated around its own axis. According to this embodiment, the spoiler has a spiral shape, which plays a role in rotating and stirring the gas and air, thereby improving the mixing efficiency of the gas and air.

[0012] In one embodiment, the width of the spoiler gradually decreases in a direction away from the diverter plate. According to this embodiment, the mixed gas rotates and moves under the action of the spoiler, ensuring smooth rotation and stirring of the gas and air mixed gas.

[0013] In one embodiment, the plurality of diverter holes are evenly distributed on the diverter plate, and / or the plurality of spoilers are evenly distributed on the diverter plate. Through this embodiment, the plurality of diverter holes and the plurality of spoilers are evenly distributed, ensuring uniformity of the mixed gas when passing through the diverter plate, and allowing the mixed gas to flow smoothly.

[0014] In one embodiment, the plurality of diverter holes on the diverter plate are evenly distributed around the center of the connection position of the spoiler on the diverter plate. With this embodiment, the diverter holes surround the periphery of the spoiler. When the spoiler acts to disrupt and guide the flow, the diverter holes can guide the mixed air near the edge of the flow channel directed by the spoiler, thereby achieving smooth air flow.

[0015] In one embodiment, the inlet end of the blower is detachably provided with an air filter. In this embodiment, air passes through the air filter and enters the blower from the blower inlet, thereby purifying the air.

[0016] In one embodiment, a filter locating buckle is provided at the inlet end of the fan, and the air filter is connected to the fan via the filter locating buckle. In this embodiment, the filter locating buckle adopts a slide type, which facilitates quick replacement and maintenance of the air filter.

[0017] A water heater includes a burner and an air supply mixing device, wherein the air outlet of the air supply mixing device is connected to the burner. Through this embodiment, the air supply mixing device mixes air and gas in a certain proportion to ensure sufficient combustion in the burner and improve energy utilization.

[0018] The above technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0019] The air supply mixing device and water heater provided by the present invention have at least the following beneficial effects compared with the prior art:

[0020] The gas and air are pre-mixed at the rear end of the fan. The gas does not pass through the fan during the entire process, which has low requirements on the sealing and electrical properties of the fan. It is suitable for promotion, and the two-stage mixing effect is better. The overall structure is simple and reliable, and can better mix the gas and air in proportion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0022] Figure 1 An exploded schematic diagram of the air supply mixing device of the present invention is shown;

[0023] Figure 2 The cross-sectional structure of the confluence assembly and the schematic diagram of the flow direction of gas and air are shown;

[0024] Figure 3 shows a schematic perspective view of the mixing device of the present invention;

[0025] Figure 4 A schematic diagram showing the connection between the air supply mixing device and the burner of the present invention is shown;

[0026] In the drawings, like reference numerals are used for like parts, but the drawings are not necessarily true to scale.

[0027] Reference numerals:

[0028] 10-fan, 11-air filter, 12-filter positioning buckle, 20-merging assembly, 30-intake pipe, 40-mixing assembly, 41-diverter plate, 411-diverter hole, 42-spoiler, 50-burner. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings.

[0030] The air supply mixing device of the present invention includes a fan 10, the air outlet end of the fan 10 is connected to a merging component 20 and the two are connected to each other, the merging component 20 is provided with an air inlet pipe 30 for inputting fuel gas, and the merging component 20 is also provided with a (air outlet) mixing component 40 located at the rear end of the air inlet pipe 30 along the direction of air flow.

[0031] The gas and air merging assembly 20 and the mixing assembly 40 are both arranged at the rear end of the fan 10. Compared with pre-mixing at the front end of the fan 10, the gas does not pass through the fan 10, and the gas movement path passes through fewer equipment structures and the distance is shorter. Compared with pre-mixing at the front end of the fan 10, pre-mixing at the rear end of the fan 10 has lower requirements for the sealing and electrical safety of the fan 10, low manufacturing costs, and is more suitable for promotion. By setting up the merging assembly 20, it is possible to achieve proportional input of gas and air entering through the fan. The gas and air can first be pre-mixed inside the merging assembly 20, and then the gas and air can be further mixed by the mixing assembly 40 arranged at the air outlet of the merging assembly 20. The two-stage mixing effect is better. The mixing assembly 40 is arranged inside the merging assembly 20, which further reduces the sealing requirements of the mixing assembly 40 and the merging assembly 20 compared to setting the mixing assembly 40 outside the merging assembly 20.

[0032] In this embodiment, the mixing assembly 40 is disposed at the air outlet of the merging assembly 20 , and may also be disposed at other locations inside the merging assembly 20 according to actual conditions.

[0033] In one embodiment, the merging assembly 20 has a throat portion with a reduced inner diameter between the air inlet and the air outlet. The air inlet pipe 30 is disposed in the throat portion and communicates with the throat passage in the throat portion.

[0034] Specifically, the air inlet end of the merging component 20 is connected to the air outlet end of the fan 10. The operating principle of the merging component 20 is similar to that of the Venturi tube. After the air enters the merging component 20, the pressure at the throat becomes smaller, and an airflow phenomenon is generated from the air inlet pipe 30 to the merging component 20. Under this force, the gas enters the merging component 20 smoothly. At the throat position, the air and gas merge and move together toward the air outlet end of the merging component 20, which plays a role of preliminary mixing.

[0035] In one embodiment, the mixing assembly 40 includes a diverter plate 41, which covers the air outlet of the merging assembly 20. The diverter plate 41 is provided with a plurality of diverter holes 411. The diverter plate 41 covers the air outlet of the merging assembly 20. The porous structure of the diverter plate 41 evenly distributes the airflow, thereby further mixing the air. The diversion effect of the diverter plate 41 ensures that the mixture of gas and air enters the burner 50 in a uniform manner.

[0036] In one embodiment, the mixing assembly 40 further includes a spoiler 42 , one end of which is connected to a surface of the diverter plate 41 close to the interior of the merging assembly 20 , and the other end of the spoiler 42 extends toward the interior of the merging assembly 20 .

[0037] The spoiler 42 is used to disturb the mixture of gas and air, thereby stirring the mixture and improving the mixing efficiency of the gas and air.

[0038] Specifically, the spoiler 42 is connected to the diverter plate 41 by welding or gluing. When there is only one spoiler 42, the spoiler 42 is located at the center of the diverter plate 41; the number of spoilers 42 can be set to multiple, and multiple spoilers 42 are evenly distributed on the diverter plate 41 for the air mixing device.

[0039] In one embodiment, the spoiler 42 is in the shape of a spiral that twists and turns around its own axis. The spoiler 42 has a spiral shape, which plays a role in rotating and stirring the gas and air, thereby improving the mixing efficiency of the gas and air. Figure 2 As shown, the mixed gas moves along the spiral surface of the spoiler 42, reducing the loss of kinetic energy of the mixed gas and ensuring that the mixed gas can smoothly pass through the diverter plate and enter the burner 50.

[0040] In one embodiment, the width of the spoiler 42 gradually decreases in the direction away from the diverter plate 41. The mixed gas rotates and moves under the action of the spoiler 42, ensuring the smooth rotation and stirring of the gas and air mixed gas. Figure 3 As shown, the spiral spoiler 42 is generally conical on the diverter plate 41, with the top of the cone facing the flow direction of the mixed gas, which better withstands the impact of the mixed gas. In addition, the conical structure can guide and disperse the mixed gas outward, preventing the mixed gas from being excessively concentrated at the center of the air outlet.

[0041] In one embodiment, the plurality of diverter holes 411 are evenly distributed on the diverter plate 41, and / or the plurality of spoilers 42 are evenly distributed on the diverter plate 41. The even distribution of the plurality of diverter holes 411 and / or the plurality of spoilers 42 ensures uniformity of the mixed gas when passing through the diverter plate 41, allowing the mixed gas to flow smoothly.

[0042] In one embodiment, a removable air filter 11 is provided at the inlet of the fan 10. Air passes through the air filter 11 and enters the fan 10 from the air inlet, purifying the air. It also filters out larger foreign particles, preventing them from entering the fan 10 and affecting its normal operation.

[0043] In one embodiment, a filter positioning buckle 12 is provided at the inlet end of the fan 10, and the air filter 11 is connected to the fan 10 via the filter positioning buckle 12. The filter positioning buckle 12 is a slide-type filter positioning buckle 12, and there are at least three filter positioning buckles 12, which are located on the periphery of the air inlet end of the fan 10. All the filter positioning buckles 12 reserve a channel for the installation and removal of the air filter 11, that is, after the air filter 11 is inserted, the air filter 11 covers the air inlet end of the filter of the fan 10, and the edge of the air filter 11 is fixed by the filter positioning buckle 12. When the air filter 11 needs to be replaced and repaired, the air filter 11 can be directly pulled out through the channel reserved by the filter positioning buckle 12. The filter positioning buckle 12 adopts a slide-type, which is convenient for quick replacement and maintenance of the air filter 11.

[0044] The water heater of the present invention comprises a burner 50 and an air supply mixing device, the air outlet of the air supply mixing device being connected to the burner 50. The air supply mixing device mixes air and gas in a certain proportion to ensure sufficient combustion in the burner 50 and improve energy utilization.

[0045] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention.

[0046] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. An air supply mixing device, characterized in that: The fan comprises a fan, the air outlet of the fan is connected to a merging assembly and the two are in communication with each other, the merging assembly is provided with an air inlet pipe for inputting gas, and the merging assembly is further provided with a mixing assembly located at the rear end of the air inlet pipe along the direction of air flow; The merging assembly has a throat portion with a reduced inner diameter between its air inlet and air outlet, and the air inlet pipe is arranged in the throat portion and communicates with the throat passage in the throat portion; The mixing assembly includes a diverter plate, the diverter plate cover is arranged at the air outlet of the merging assembly, and a plurality of diverter holes are opened on the diverter plate; The mixing assembly further includes a spoiler, one end of which is connected to a surface of the diverter plate close to the interior of the merging assembly, and the other end of which extends toward the interior of the merging assembly; The spoiler is in a spiral shape that is twisted and rotated around its own axis; The width of the spoiler gradually decreases in a direction away from the diverter plate; When the number of the spoiler is one, the spoiler is located at the center of the diverter plate.

2. The air supply mixing device according to claim 1, characterized in that: The plurality of diverter holes are evenly distributed on the diverter plate, and / or the plurality of spoilers are evenly distributed on the diverter plate.

3. The air supply mixing device according to any one of claims 1 to 2, characterized in that: With the connection position of the spoiler on the diverter plate as the center, the multiple diverter holes on the diverter plate are evenly distributed around the center.

4. The air supply mixing device according to claim 1, characterized in that: An air filter is detachably provided at the air inlet end of the fan.

5. The air supply mixing device according to claim 4, characterized in that: The air inlet end of the fan is provided with a filter positioning buckle, and the air filter is connected to the fan through the filter positioning buckle.

6. A water heater, characterized in that: It comprises a burner and the air supply mixing device according to any one of claims 1 to 5, wherein the air outlet end of the air supply mixing device is connected to the burner.

Images