Full-premixing self-adaptive wall-hanging stove

Abstract

The invention relates to the technical field of wall-hanging stoves and discloses a full-premixing self-adaptive wall-hanging stove which comprises a shell, a combustion chamber and an exhaust chamber are arranged in the shell, the exhaust chamber is located above the combustion chamber, a heat exchanger is arranged between the combustion chamber and the exhaust chamber, and a gas conveying assembly is arranged at the bottom of the combustion chamber. The gas transmission assembly is communicated with the combustion chamber; gas is conveyed to the mixing pipe through the gas pipe and the air pipe which are oppositely arranged together, so that gas and outside air are impacted and mixed at the junction of the gas pipe, the air pipe and the mixing pipe, the premixing effect is achieved, the combustion efficiency of the gas in the combustion chamber is improved by changing the mixing ratio of the gas and the outside air, and the combustion efficiency of the gas is improved. And through separation and opening of the stop block, the gas pipe and the air pipe are completely sealed and isolated by the stop block when the device does not work.

Description

Technical Field

[0001] The present invention relates to the technical field of wall-mounted boilers, and specifically to a fully premixed adaptive wall-mounted boiler. Background Art

[0002] With the development of technology, while people are improving the quality of life, they are paying more and more attention to environmental protection. Taking winter heating as an example, compared with coal-fired heating equipment that will generate more soot and polluting gases (such as CO2, SO2, etc.) which will cause greater harm to the environment, gas-fired heating water heaters use natural gas as energy and heat water through the combustion of natural gas to meet the heating demand. Gas-fired heating water heaters are more environmentally friendly and can avoid environmental pollution.

[0003] In existing wall-mounted boilers, gas is usually sprayed into the combustion chamber through a pipeline, and a flow-through pipe is installed on the side wall of the combustion chamber to allow outside air to enter the combustion chamber to provide an oxidizer. During this process, the gas and outside air do not mix with each other, resulting in insufficient combustion heating in the combustion chamber, so that some gas is discharged outside the housing without being completely burned. Summary of the Invention

[0004] The purpose of the present invention is to provide a fully premixed adaptive wall-mounted boiler to solve the problems raised in the prior art.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A fully premixed adaptive wall-mounted boiler includes a housing. A combustion chamber and an exhaust chamber are arranged inside the housing. The exhaust chamber is located above the combustion chamber. A heat exchanger is arranged between the combustion chamber and the exhaust chamber. A gas delivery component is arranged at the bottom of the combustion chamber, and the gas delivery component is communicated with the combustion chamber.

[0007] Preferably, the gas delivery component includes a gas pipe and an air pipe. A mixing pipe is arranged between the gas pipe and the air pipe. The gas pipe and the air pipe are symmetrically arranged on both sides of the mixing pipe.

[0008] Gas is delivered to the mixing pipe through the gas pipe, and outside air is delivered to the mixing pipe through the air pipe. Since the gas pipe and the air pipe are symmetrically arranged on both sides of the mixing pipe, during the flow process, the gas and outside air form an oncoming flow, so that the gas and outside air form a collision and mixing on one side of the mixing pipe close to the gas pipe and the air pipe, thus enabling the gas and outside air to be mixed.

[0009] Preferably, a gas proportional valve is arranged at the bottom of the gas pipe, and an air extraction pump is arranged at the bottom of the air pipe. The gas proportional valve is used to limit the delivery ratio of gas, and the air extraction pump is used to deliver outside air into the combustion chamber.

[0010] The controller controls the opening of the gas proportional valve and the air extraction pump. The gas proportional valve controls the amount of gas delivered to the gas pipe, and the air extraction pump extracts outside air and delivers it into the air pipe, so that the ratio of gas and air in the mixing pipe is within the optimal combustion ratio range, thereby improving the combustion efficiency of the gas.

[0011] Preferably, spiral grooves are provided in both the gas pipe and the air pipe, and the spiral directions of the two spiral grooves are opposite.

[0012] When the gas and outside air flow along the gas pipe and the air pipe respectively, they encounter the spiral grooves. As a result, the gas and outside air on the outer side of the flow form a spiral conveying flow state under the action of the spiral grooves. Since the spiral directions of the two spiral grooves are opposite, at the intersection position of the two spiral grooves, the gas and outside air on the outer side of the flow collide in a spiral flow state, and the reverse spiral will form turbulence at the intersection, thereby accelerating the mixing efficiency of the gas and outside air in the mixing pipe.

[0013] Preferably, a blocking block is provided in the mixing pipe. The blocking block is slidably connected to the mixing pipe. A plurality of sliding grooves are provided on the inner wall of the mixing pipe. A slider is provided on one side of the blocking block close to the sliding groove. An electromagnetic spring is provided between the slider and the sliding groove, and the slider is slidably connected to the sliding groove.

[0014] When the water is not being heated, the electromagnetic spring is in an energized state at this time, and thus the electromagnetic spring is in a contracted state, that is, the slider is located at the bottom side of the sliding groove. At this time, the bottom of the blocking block is located between the gas pipe and the air pipe. Furthermore, the gas pipe and the air pipe are isolated by the blocking block, and the blocking block seals the gas pipe and the air pipe. At this time, the gas and outside air cannot be delivered into the mixing pipe;

[0015] When the water needs to be heated, the controller controls the electromagnetic spring to be powered off. At this time, after the electromagnetic spring loses the attraction of the magnetic force, it pushes the slider to slide under the action of the elastic force. The slider drives the blocking block to move towards the side close to the mixing pipe along the sliding groove, so that the blocking block is separated from the gas pipe and the air pipe, and further the mixing pipe is communicated with the gas pipe and the air pipe.

[0016] Preferably, a pressure ring is provided on the side of the mixing pipe away from the blocking block. A rotating impeller is provided in the pressure ring. The rotating impeller is slidably connected to the pressure ring. An electromagnetic coil is provided inside the pressure ring, and a magnetic conductor is provided inside the rotating impeller.

[0017] When the blocking block moves into the mixing pipe, at this time the air inlet and the air outlet are respectively communicated with the mixing pipe. Then, the gas mixture that collides and mixes at the intersection of the gas pipe, the air pipe and the mixing pipe enters the pressure ring through the air inlet. At this time, the controller controls the electromagnetic coil to start, and the magnetic force generated by the electromagnetic coil drives the magnetic conductor in the rotating impeller to rotate, so that the rotating impeller drives the transportation of the gas mixture during the rotation process. The flow rate of the gas mixture increases under the rotation action of the rotating impeller, so that the gas and air are further stirred and mixed in the pressure ring, ensuring that the gas is fully dispersed, while increasing the injection speed of the gas mixture, and finally output from the pressure ring to the air outlet, so that the gas mixture is transported to the gas transmission pipe through the mixing pipe.

[0018] Preferably, a plurality of air outlets are provided at the upper end of the pressure ring close to the mixing pipe, and a plurality of air inlets are provided at the lower end of the pressure ring close to the mixing pipe.

[0019] Preferably, two arc grooves are symmetrically arranged at the bottom of the blocking block, and the two arc grooves are respectively oriented towards the gas pipe and the air pipe, and a conical guide block is arranged at the top of the blocking block.

[0020] If there is a leakage problem with the gas proportional valve or a failure occurs in the air extraction pump, at this time the controller controls the blocking block to block the gas pipe and the air pipe. At this time, the gas entering the gas pipe and the external air entering the air pipe continuously increase, so that the pressure in the gas pipe and the air pipe increases. By providing two arc grooves, the pressure is evenly distributed on the surface of the arc grooves, so that the pressure that the blocking block can bear increases, avoiding the sealing failure caused by abnormal pipeline pressure, thereby improving the safety of the wall-mounted boiler;

[0021] During the transportation of the gas mixture, by arranging a conical guide block at the top of the blocking block, the distance between the conical guide block and the air outlet is reduced, so that when the gas mixture flows through the gap between the conical guide block and the air outlet, the flow rate of the gas mixture increases, thereby improving the transportation efficiency of the gas mixture.

[0022] Preferably, a plurality of gas transmission pipes are provided at the top of the mixing pipe, a plurality of jet ports are provided on the side of the gas transmission pipe close to the combustion chamber, a ignition needle is provided on one side of the jet port, and the diameter of the gas transmission pipe is smaller than the diameter of the mixing pipe.

[0023] The gas mixture is transported through the mixing pipe to the gas transmission pipe. Since the diameter of the gas transmission pipe is smaller than that of the mixing pipe, the gas mixture is ejected from the jet nozzle at a relatively high flow rate, and then the gas mixture is ignited by the ignition needle, so that the gas mixture forms a relatively high flame jet at a relatively high flow rate, thereby shortening the distance between the flame apex and the heat exchanger, making the flame temperature distribution more concentrated, and thus enabling the heat of the flame to be transferred to the heat exchanger more quickly, improving the utilization rate of the heat transfer area of the heat exchanger.

[0024] Preferably, a water inlet pipe and a water outlet pipe are respectively arranged at the bottom of the heat exchanger.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0026] 1. The gas and the outside air collide and mix at the intersection position of the three pipes of the gas pipe, the air pipe and the mixing pipe under the condition of relative flow. After preliminary collision and mixing, the gas mixture is transported through the mixing pipe to the pressure ring, and is further mixed in the pressure ring, and cooperates with the gas transmission pipe to further increase the flow rate of the gas mixture, thereby shortening the distance between the ignited flame apex of the gas and the heat exchanger, so as to transfer more heat to the surface of the heat exchanger, thereby improving the heat exchange efficiency.

[0027] 2. When there is a leakage problem with the gas proportional valve or a failure occurs in the air extraction pump, the controller controls the blocking block to block the gas pipe and the air pipe at this time. At this time, the gas entering the gas pipe and the outside air entering the air pipe continuously increase, causing the pressure in the gas pipe and the air pipe to increase. By providing two arc grooves, the pressure is evenly distributed on the surface of the arc grooves, increasing the pressure that the blocking block can withstand, avoiding the sealing failure caused by abnormal pipeline pressure, and thus improving the safety of the wall-mounted boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a schematic internal structure diagram of the present invention;

[0029] Figure 2 is a three-dimensional view of the present invention;

[0030] Figure 3 is a front internal view of the present invention;

[0031] Figure 4 is a schematic structural diagram of the gas transmission component;

[0032] Figure 5 is a schematic internal structure diagram of the gas transmission component;

[0033] Figure 6 is a front internal view of the gas transmission component;

[0034] Figure 7 is a schematic structural diagram of the blocking block;

[0035] Figure 8 For Figure 5 The enlarged view at position A in the figure;

[0036] In the figure: 1. Housing; 11. Combustion chamber; 12. Exhaust chamber; 13. Heat exchanger; 14. Water inlet pipe; 15. Water outlet pipe;

[0037] 2. Gas delivery assembly; 21. Gas pipe; 211. Gas proportioning valve; 22. Air pipe; 221. Air extraction pump; 23. Mixing pipe; 24. Spiral groove; 25. Blocking block; 251. Slide block; 252. Arc groove; 253. Conical guiding block; 26. Sliding groove; 27. Pressurizing ring; 271. Air outlet; 272. Air inlet; 28. Rotating impeller; 29. Gas delivery pipe; 291. Jet orifice. Specific implementation manner

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0039] Embodiment: As Figures 1-8 shown, the present invention provides a technical solution for a fully premixed adaptive wall-mounted boiler, including a housing 1. A combustion chamber 11 and an exhaust chamber 12 are arranged inside the housing 1. The exhaust chamber 12 is located above the combustion chamber 11. A heat exchanger 13 is arranged between the combustion chamber 11 and the exhaust chamber 12. A gas delivery assembly 2 is arranged at the bottom of the combustion chamber 11, and the gas delivery assembly 2 is communicated with the combustion chamber 11.

[0040] As a specific implementation manner of the present invention, a water inlet pipe 14 and a water outlet pipe 15 are respectively arranged at the bottom of the heat exchanger 13.

[0041] As a specific implementation manner of the present invention, the gas delivery assembly 2 includes a gas pipe 21 and an air pipe 22. A mixing pipe 23 is arranged between the gas pipe 21 and the air pipe 22. The gas pipe 21 and the air pipe 22 are symmetrically arranged on both sides of the mixing pipe 23.

[0042] As a specific implementation manner of the present invention, a gas proportioning valve 211 is arranged at the bottom of the gas pipe 21, and an air extraction pump 221 is arranged at the bottom of the air pipe 22. The gas proportioning valve 211 is used to limit the delivery proportion of gas, and the air extraction pump 221 is used to deliver external air into the combustion chamber 11.

[0043] As a specific embodiment of the present invention, spiral grooves 24 are provided in both the gas pipe 21 and the air pipe 22, and the spiral directions of the two spiral grooves 24 are opposite.

[0044] As a specific embodiment of the present invention, a blocking block 25 is provided in the mixing pipe 23. The blocking block 25 is slidably connected to the mixing pipe 23. A plurality of sliding grooves 26 are provided on the inner wall of the mixing pipe 23. A slider 251 is provided on one side of the blocking block 25 close to the sliding groove 26. An electromagnetic spring is provided between the slider 251 and the sliding groove 26, and the slider 251 is slidably connected to the sliding groove 26.

[0045] As a specific embodiment of the present invention, two arc grooves 252 are symmetrically provided at the bottom of the blocking block 25. The two arc grooves 252 face the gas pipe 21 and the air pipe 22 respectively, and a conical guide block 253 is provided at the top of the blocking block 25.

[0046] As a specific embodiment of the present invention, a pressure ring 27 is provided on one side of the mixing pipe 23 away from the blocking block 25. A rotating impeller 28 is provided in the pressure ring 27. The rotating impeller 28 is slidably connected to the pressure ring 27. An electromagnetic coil is provided inside the pressure ring 27, and a magnetic conductor is provided in the rotating impeller 28.

[0047] As a specific embodiment of the present invention, a plurality of air outlets 271 are provided at the upper end of the pressure ring 27 on the side close to the mixing pipe 23, and a plurality of air inlets 272 are provided at the lower end of the pressure ring 27 on the side close to the mixing pipe 23.

[0048] As a specific embodiment of the present invention, a plurality of gas pipes 29 are provided at the top of the mixing pipe 23. A plurality of jet ports 291 are provided on the side of the gas pipe 29 close to the combustion chamber 11. An ignition needle is provided on one side of the jet port 291. The diameter of the gas pipe 29 is smaller than the diameter of the mixing pipe 23.

[0049] The working principle of the present invention:

[0050] When water heating is not carried out, at this time the electromagnetic spring is in an energized state, and thus the electromagnetic spring is in a contracted state, that is, the slider 251 is located at the bottom side of the sliding groove 26. At this time, the bottom of the blocking block 25 is located between the gas pipe 21 and the air pipe 22. Thus, the gas pipe 21 and the air pipe 22 are isolated by the blocking block 25, and the blocking block 25 seals the gas pipe 21 and the air pipe 22. At this time, gas and external air cannot be transported into the mixing pipe 23;

[0051] When it is necessary to heat the water, the controller controls the electromagnetic spring to cut off the power. At this time, after the electromagnetic spring loses the attraction of the magnetic force, it pushes the slider 251 to slide under the action of the elastic force. The slider 251 drives the blocking block 25 to move towards the side close to the mixing pipe 23 along the sliding groove 26, so that the blocking block 25 is separated from the gas pipe 21 and the air pipe 22, and then the mixing pipe 23 is communicated with the gas pipe 21 and the air pipe 22;

[0052] Subsequently, the controller controls the gas proportion valve 211 and the air extraction pump 221 to open. The gas proportion valve 211 controls the amount of gas delivered to the gas pipe 21, while the air extraction pump 221 extracts the external air and delivers it to the air pipe 22, so that the ratio of gas and air in the mixing pipe 23 is within the optimal combustion ratio range (such as a ratio of 1:10);

[0053] The gas is delivered to the mixing pipe 23 through the gas pipe 21, and the external air is delivered to the mixing pipe 23 through the air pipe 22. Since the gas pipe 21 and the air pipe 22 are symmetrically arranged on both sides of the mixing pipe 23, when the gas and the external air flow, they form an oncoming flow, so that the gas and the external air form an impact mixing on the side of the mixing pipe 23 close to the gas pipe 21 and the air pipe 22;

[0054] When the gas and the external air flow along the gas pipe 21 and the air pipe 22 respectively, they encounter the spiral groove 24. Under the action of the spiral groove 24, the gas and the external air on the outer side of the flow form a spiral conveying flow state. Since the spiral directions of the two spiral grooves 24 are opposite, at the intersection position of the two spiral grooves 24, the gas and the external air on the outer side of the flow collide in a spiral flow state, and the reverse spiral will form a turbulent flow at the intersection;

[0055] When the blocking block 25 moves into the mixing pipe 23, at this time, the air inlet 272 and the air outlet 271 are respectively communicated with the mixing pipe 23. Then, the gas mixture that collides and mixes at the intersection of the gas pipe 21, the air pipe 22 and the mixing pipe 23 enters the pressurizing ring 27 through the air inlet 272. At this time, the controller controls the electromagnetic coil to start, and the magnetic force generated by the electromagnetic coil drives the magnetic conductor in the rotating impeller 28 to rotate, so that the rotating impeller 28 drives the gas mixture to be conveyed during the rotation process. The flow rate of the gas mixture increases under the rotation action of the rotating impeller 28, so that the gas and the air are further stirred and mixed in the pressurizing ring 27, ensuring that the gas is fully dispersed, while increasing the injection speed of the gas mixture, and finally outputting from the pressurizing ring 27 to the air outlet 271, so that the gas mixture is conveyed to the gas pipe 29 through the mixing pipe 23;

[0056] During the process of transporting the gas mixture, by arranging a conical guiding block 253 on the top of the blocking block 25, the distance between the conical guiding block 253 and the air outlet 271 is reduced, so that when the gas mixture flows through the gap between the conical guiding block 253 and the air outlet 271, the flow rate of the gas mixture is increased;

[0057] The gas mixture is transported from the mixing pipe 23 to the gas transmission pipe 29. Since the diameter of the gas transmission pipe 29 is smaller than that of the mixing pipe 23, the gas mixture is ejected from the jet orifice 291 at a relatively high flow rate. After the gas mixture is ignited by the ignition needle, the gas mixture forms a relatively high flame jet at a relatively high flow rate, so that the distance between the flame apex and the heat exchanger 13 is shortened, and the flame temperature distribution becomes more concentrated, so that the heat of the flame can be transferred to the heat exchanger 13 more quickly;

[0058] When the wall-mounted boiler needs to be shut down, first close the gas proportional valve 211 and the air extraction pump 221. After the gas in the gas pipe 21 and the air pipe 22 is completely transported to the gas transmission pipe 29 through the mixing pipe 23, the blocking block 25 isolates and separates the gas pipe 21 and the air pipe 22.

[0059] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed claims.

Claims

1. A fully premixed adaptive wall-mounted boiler, characterized in that: It includes a housing (1), inside which there is a combustion chamber (11) and an exhaust chamber (12). The exhaust chamber (12) is located above the combustion chamber (11). A heat exchanger (13) is provided between the combustion chamber (11) and the exhaust chamber (12). At the bottom of the combustion chamber (11), there is an air supply assembly (2), and the air supply assembly (2) is communicated with the combustion chamber (11).

2. The all-premixed adaptive wall-mounted boiler according to claim 1, wherein: The air supply assembly (2) includes a gas pipe (21) and an air pipe (22). A mixing pipe (23) is provided between the gas pipe (21) and the air pipe (22). The gas pipe (21) and the air pipe (22) are symmetrically arranged on both sides of the mixing pipe (23).

3. The all-premixed adaptive wall-mounted boiler according to claim 2, wherein: At the bottom of the gas pipe (21), there is a gas ratio valve (211). At the bottom of the air pipe (22), there is an air extraction pump (221). The gas ratio valve (211) is used to limit the conveying ratio of the gas, and the air extraction pump (221) is used to convey the outside air into the combustion chamber (11).

4. A fully premixed adaptive wall-mounted boiler according to claim 2, wherein: Spiral grooves (24) are provided in both the gas pipe (21) and the air pipe (22), and the spiral directions of the two spiral grooves (24) are opposite.

5. The all-premixed adaptive wall-mounted boiler according to claim 2, characterized in that: A blocking block (25) is provided in the mixing pipe (23). The blocking block (25) is slidably connected to the mixing pipe (23). A number of sliding grooves (26) are provided on the inner wall of the mixing pipe (23). On the side of the blocking block (25) close to the sliding groove (26), there is a slider (251). An electromagnetic spring is provided between the slider (251) and the sliding groove (26), and the slider (251) is slidably connected to the sliding groove (26).

6. The all-premixed adaptive wall-mounted boiler according to claim 5, wherein: On the side of the mixing pipe (23) away from the blocking block (25), there is a pressurizing ring (27). A rotating impeller (28) is provided in the pressurizing ring (27). The rotating impeller (28) is slidably connected to the pressurizing ring (27). An electromagnetic coil is provided inside the pressurizing ring (27), and a magnetic conductor is provided in the rotating impeller (28).

7. The all-premixed adaptive wall-mounted boiler according to claim 6, wherein: On the upper end of the side of the pressurizing ring (27) close to the mixing pipe (23), there are a number of air outlets (271). On the lower end of the side of the pressurizing ring (27) close to the mixing pipe (23), there are a number of air inlets (272).

8. The all-premixed adaptive wall-mounted boiler according to claim 5, characterized in that: On the bottom of the blocking block (25), there are two arc grooves (252) symmetrically arranged. The two arc grooves (252) are respectively directed towards the gas pipe (21) and the air pipe (22). On the top of the blocking block (25), there is a conical guiding block (253).

9. The all-premixed adaptive wall-mounted boiler according to claim 2, characterized in that: On the top of the mixing pipe (23), there are a number of gas pipes (29). On the side of the gas pipe (29) close to the combustion chamber (11), there are a number of jet ports (291). On one side of the jet port (291), there is an ignition needle. The diameter of the gas pipe (29) is smaller than the diameter of the mixing pipe (23).

10. The all-premixed adaptive wall-mounted boiler according to claim 1, characterized in that: At the bottom of the heat exchanger (13), there are respectively a water inlet pipe (14) and a water outlet pipe (15).

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