Fireplace with high combustion efficiency
By introducing a secondary air intake component and a baffle plate into the fireplace to optimize gas flow, multiple combustion reactions are achieved, solving the problems of low combustion efficiency and high pollutant emissions in existing fireplaces, and improving combustion efficiency and thermal efficiency.
Patent Information
- Application Number
- CN202311228631.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-09-21
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2043-09-21
AI Technical Summary
Existing fireplaces do not achieve adequate combustion of combustible gases after secondary air intake, resulting in high pollutant emission concentrations, fuel waste, and low combustion and thermal efficiency.
The system employs a secondary air intake assembly, including a first and second air duct module. This assembly enhances the combustion efficiency of combustible gases through multiple combustion reactions and optimizes gas flow using air duct components and guide vanes to ensure thorough mixing and combustion.
It improves the overall combustion and thermal efficiency of the fireplace, reduces pollutant emissions, and avoids fuel waste.
Smart Images
Figure CN117128540B_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of fireplace technology, and in particular to a fireplace with high combustion efficiency. BACKGROUND
[0002] With the increasing improvement of people's living standards, the market demand for heating equipment such as fireplaces is increasing. The existing fireplaces place fuel such as firewood or coal in the combustion chamber for combustion to generate heat. In order to improve the combustion efficiency of the fireplace, a secondary air inlet assembly is provided in the fireplace to fully mix the combustible gas with air for combustion. Although the existing fireplaces have the function of secondary air inlet, the combustion effect of the combustible gas after secondary air inlet is still not up to standard. The combustible gas cracked by the fuel cannot be completely burned, and the incomplete combustion of the combustible gas will produce pollutants, resulting in too high emission concentration of pollutants. At the same time, the incomplete combustion of the combustible gas cannot produce more heat, causing waste of fuel and not reaching the ideal combustion efficiency and thermal efficiency. SUMMARY
[0003] The present application provides a fireplace table with high combustion efficiency, which has the advantages of reasonable secondary combustion, improved combustible gas combustion efficiency and thermal efficiency, and optimized fuel waste problem.
[0004] In order to solve the above problems, the present application adopts the following technical scheme to achieve it:
[0005] The fireplace table with high combustion efficiency of the present application comprises a fireplace body, a combustion chamber is arranged in the fireplace body, an exhaust port for communicating the outside with the combustion chamber is arranged on the top of the fireplace body, a main air inlet hole for communicating the combustion chamber is arranged on the bottom of the fireplace body, a secondary air inlet assembly is arranged in the combustion chamber, the secondary air inlet assembly comprises a first exhaust duct and a second exhaust duct module, the first exhaust duct is arranged on the rear side of the combustion chamber, the second exhaust duct module is arranged on the front side of the first exhaust duct, a secondary air inlet hole is arranged on the rear side of the fireplace body, the secondary air inlet hole is in communication with the first exhaust duct, the first exhaust duct and the second exhaust duct module are in communication through an air duct assembly, a plurality of first exhaust holes running left and right are arranged on the front side of the first exhaust duct, the second exhaust duct module comprises a plurality of second exhaust ducts arranged side by side in front and back, and a plurality of second exhaust holes running left and right are arranged on the front side of the second exhaust duct.
[0006] In the present scheme, the external air enters the combustion chamber through the main air inlet hole at the bottom of the combustion chamber and begins the first combustion reaction with the fuel. The fuel will crack at high temperature to produce high ignition point combustible gas. The combustible gas rises to the first exhaust cylinder in the secondary air inlet assembly and undergoes secondary combustion with the external air from the secondary air inlet hole. After the secondary combustion of the combustible gas, it moves to the multiple second exhaust cylinders in the second exhaust cylinder module and undergoes multiple sufficient combustion with the external air from the secondary air inlet hole. The combustible gas moves from back to front and gradually burns out the combustible part of the combustible gas, improving the overall combustion efficiency and thermal efficiency.
[0007] As a preferred, the second exhaust cylinder is two, the distance between the second exhaust cylinder at the rear side and the first exhaust cylinder is less than the distance between the two second exhaust cylinders. The concentration of the combustible gas decreases after passing through the first exhaust cylinder, and then decreases again after passing through the second exhaust cylinder at the rear side. In order to ensure that the combustible gas can be fully burned, the distance between the two second exhaust cylinders is greater than the distance between the second exhaust cylinder at the rear side and the first exhaust cylinder.
[0008] As a preferred, the multiple second exhaust cylinders are arranged in a straight line from back to front and upwardly inclined.
[0009] As a preferred, the air duct assembly includes left and right symmetrically arranged connecting blocks, which are fixedly connected with the side wall of the corresponding side combustion chamber. The connecting block is hollow and communicates with the first exhaust cylinder and the two second exhaust cylinders.
[0010] As a preferred, the secondary air inlet assembly further includes a baffle, which is arranged from back to front and upwardly inclined. The first exhaust cylinder and the second exhaust cylinder module are arranged at the bottom of the baffle. The baffle guides the combustible gas after colliding with it, so that the combustible gas moves upwardly from back to front.
[0011] As a preferred, a guide plate is arranged between the rear side of the second exhaust cylinder and the baffle. The top of the guide plate is in contact with the bottom of the baffle, the bottom of the guide plate is in contact with the lowest point of the corresponding second exhaust cylinder, and the lower surface of the guide plate forms a curved surface. The curved surface of the lower surface of the guide plate can buffer the combustible gas, so that the flow rate of the combustible gas on the curved surface decreases, the contact time of the combustible gas and the air at the second exhaust cylinder is improved, so that they can fully react. At the same time, the guide plate can avoid the combustible gas staying at the connection between the second exhaust cylinder and the baffle, and avoid the insufficient reaction of the combustible gas and the air out of the second exhaust cylinder.
[0012] As a preferred, the second exhaust hole on the second exhaust cylinder is arranged from front to back and upwardly inclined, and the extension line of the axis of the second exhaust hole intersects with the axis of the second exhaust cylinder. The second exhaust hole is arranged from front to back and upwardly inclined, which can make the external air and the combustible gas fully mixed and burned.
[0013] As preferred, the angle between the axis of the second exhaust hole at the two ends of the second exhaust cylinder and the horizontal plane is 50°, and the angle between the axis of the adjacent second exhaust hole and the horizontal plane decreases by 10° from the two ends to the center until the angle between the axis of the second exhaust hole and the horizontal plane is 0°. In order to ensure that the combustible gas can fully react with the air sprayed in the corresponding second exhaust cylinder, the angle of the external air spray needs to be changed. When the angle changes, the contact area between the external air and the combustible gas increases, making the combustion more sufficient.
[0014] As preferred, the distance between the adjacent second exhaust holes closest to the ends of the second exhaust cylinder is D, and the distance between the adjacent second exhaust holes decreases by A from the two ends to the center of the second exhaust cylinder. The air flow rate is fast at the two ends of the second exhaust cylinder. In order to ensure the exhaust effect of the whole second exhaust cylinder, the arrangement of the second exhaust holes on the second exhaust cylinder gradually becomes dense from the two ends to the center, so that the exhaust amount of each second exhaust hole on the second exhaust cylinder is consistent, and the combustible gas can be fully mixed and burned with the air.
[0015] As preferred, the diameter of the second exhaust hole on the second exhaust cylinder gradually increases from the two ends to the center. The gradually increasing diameter of each second exhaust hole from the two ends to the center makes the exhaust amount of each second exhaust hole close, so that the air and the combustible gas are fully mixed and burned.
[0016] The beneficial effects of the present application are: the second exhaust cylinder module can gradually burn out the combustible part of the combustible gas, improve the overall combustion efficiency and thermal efficiency of the fireplace; the second exhaust cylinder can make the air and the combustible gas fully mixed and burned; the curved surface of the lower surface of the flow guide plate can buffer the combustible gas, reduce the flow rate of the combustible gas, and prolong the contact time of the combustible gas with the air at the second exhaust cylinder, and the flow guide plate can avoid the combustible gas from being retained at the connection between the second exhaust cylinder and the flow guide plate, and avoid the insufficient reaction of the combustible gas with the air discharged from the second exhaust cylinder. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 is a structural schematic diagram of example 1 in the present application;
[0018] Figure 2 is a sectional view of example 1 in the present application;
[0019] Figure 3 is a half-sectional view of example 1 in the present application;
[0020] Figure 4 is a half-sectional view of example 2 in the present application.
[0021] In the diagram: 1. Fireplace body, 11. Exhaust port, 12. Main air inlet, 2. Combustion chamber, 3. Secondary air intake assembly, 31. First air duct, 32. Second air duct module, 321. Second air duct, 33. Secondary air inlet, 34. Baffle, 35. Guide plate, 4. Air duct assembly, 41. Connecting block, 5. Furnace door assembly, 51. Furnace door cover, 52. Observation glass, 6. Air curtain assembly, 61. Air curtain inlet, 62. Air curtain adjustment assembly, 63. Air curtain guide plate. Detailed Implementation
[0022] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.
[0023] Example 1: A fireplace mantle with high combustion efficiency according to this example, such as... Figures 1 to 3 As shown, the fireplace includes a fireplace body 1, a combustion chamber 2 inside the fireplace body 1, an exhaust port 11 at the top of the fireplace body 1 connecting the outside to the combustion chamber, a main air inlet 12 at the bottom of the fireplace body 1 connecting to the combustion chamber, a secondary air intake assembly 3 inside the combustion chamber 2, the secondary air intake assembly 3 including a first exhaust duct 31 and a second exhaust duct module 32, the first exhaust duct 31 being located at the rear of the combustion chamber 2, the second exhaust duct module 32 being located at the front of the first exhaust duct 31, and a secondary air inlet 33 at the rear of the fireplace body 1. The secondary air inlet 33 is connected to the first row of air ducts 31. The first row of air ducts 31 is connected to the second row of air duct modules 32 via the air duct assembly 4. The front side of the first row of air ducts 31 has multiple left-right oriented first row air holes. The second row of air duct modules 32 includes two second row of air ducts 321 arranged side by side. The front side of the second row of air ducts 321 has multiple left-right oriented second row air holes. The distance between the rear second row of air ducts 321 and the first row of air ducts 31 is less than the distance between the two second row of air ducts 321. The second row of air holes are inclined upwards from front to back, and the angle between the axis of the second row of air holes and the horizontal plane is 20° to 50°. The second row of air holes correspond one-to-one with the first row of air holes.
[0024] The air duct assembly 4 includes connecting blocks 41 arranged symmetrically on the left and right sides. The connecting blocks 41 are fixedly connected to the side wall of the combustion chamber 2 on the corresponding side. The connecting blocks 41 are hollow and communicate with the first row of air ducts 31 and two second row of air ducts 321.
[0025] The secondary air intake assembly 3 also includes a baffle plate 34, which is inclined upward from back to front. The first row of air ducts 31 and the second row of air duct modules 32 are located at the bottom of the baffle plate 34, and the two second row of air ducts 321 are arranged in a straight line inclined upward from back to front.
[0026] The front side of the fireplace body 1 is provided with a fireplace door assembly 5, which includes a fireplace door cover plate 51. The combustion chamber 2 is provided with an opening corresponding to the position of the fireplace door cover plate 51, which matches the fireplace door cover plate 51. The fireplace door cover plate 51 is hinged to the fireplace body 1. An observation glass 52 is arranged on the fireplace door cover plate 51. A locking mechanism is arranged on one side of the fireplace door cover plate 51 for locking / unlocking the fireplace door cover plate 51 and the fireplace body 1.
[0027] A wind curtain assembly 6 is further arranged in the combustion chamber 2. The wind curtain assembly 6 includes seven wind curtain air inlets 61 arranged on the top front side of the combustion chamber 2. The seven wind curtain air inlets 61 are arranged along the left-right direction. The seven wind curtain air inlets 61 are all connected to the outside. The fireplace body 1 is provided with a wind curtain adjusting assembly 62 corresponding to the air inlet position of the wind curtain air inlet 61. The wind curtain adjusting assembly is used to adjust the air inlet amount of the wind curtain air inlet 61. The wind curtain assembly 6 further includes a wind curtain guide plate 63. The wind curtain guide plate 63 includes a first vertical part, an inclined part, and a second vertical part. The first vertical part is located on the rear side of the wind curtain air inlet 61. The top of the first vertical part is fixedly connected to the top front side of the combustion chamber. The top of the inclined part is connected to the bottom of the first vertical part. The inclined part is inclined downward from back to front. The bottom of the inclined part is fixedly connected to the top of the second vertical part. The bottom of the inclined part is at the same horizontal plane as the top of the observation glass 52. The extension line of the second vertical part intersects with the extension line of the second air outlet hole in the second air outlet cylinder 321 located on the front side.
[0028] In this scheme, the user unlocks the fireplace door cover plate and the fireplace body through the locking mechanism in the fireplace door assembly. After unlocking, the user opens the fireplace door cover plate, places fuel in the combustion chamber, ignites the fuel, and locks the fireplace door cover plate and the fireplace body. External air enters through the main air inlet hole at the bottom of the combustion chamber, mixes with the fuel in the combustion chamber, and rises to the baffle. The combustible gas flows through the first air outlet cylinder and is subjected to the first secondary combustion with the air discharged by the first air outlet cylinder. After the first secondary combustion, part of the combustible gas still exists. The combustible gas flows to the second air outlet cylinder module from the bottom of the baffle. When the combustible gas flows through the first second air outlet cylinder on the rear side, the second secondary combustion is performed with the air discharged by the second air outlet cylinder. After the second secondary combustion, the combustible part of the combustible gas is significantly reduced. The combustible gas continues to flow to the second air outlet cylinder on the front side through the baffle. When the combustible gas after the second secondary combustion contacts the air discharged by the second air outlet cylinder on the front side, the remaining combustible gas is fully combusted. The fully combusted combustible gas is discharged through the discharge port at the top of the combustion chamber.
[0029] The furnace door cover plate in the furnace door assembly is provided with an observation glass, which can be used by the user to observe the situation in the combustion chamber at any time. However, the combustion dust generated during fuel combustion will adhere to the observation glass, which will reduce the clarity of the observation glass. In order to maintain the clarity of the observation glass, the air curtain guide plate in the air curtain assembly guides the external air to the top of the observation glass, so that the air removes the combustion dust on the observation glass. In order to strengthen the intensity of the combustion dust removal airflow, the extension line of the second vertical part intersects with the extension line of the second exhaust hole in the front second exhaust cylinder, so that the airflows at the two places intersect, thereby enhancing the intensity of the combustion dust removal airflow.
[0030] Embodiment 2: A fireplace table with high combustion efficiency, the structure of embodiment 2 is basically the same as that of embodiment 1. The difference between embodiment 2 and embodiment 1 is that, as shown in Figure 4 The second exhaust cylinder 321 is provided with a guide plate 35 between the rear side and the baffle plate 34, the top of the guide plate 35 is in contact with the bottom of the baffle plate 34, the bottom of the guide plate 35 is in contact with the lowest point corresponding to the second exhaust cylinder 321, the lower surface of the guide plate 35 forms a curved surface, and the extension line of the second exhaust hole axis intersects with the axis of the second exhaust cylinder 321.
[0031] The angle between the axis of the second exhaust hole at both ends of the second exhaust cylinder 321 and the horizontal plane is 50°, the angle between the axes of adjacent second exhaust holes decreases by 10° from both ends to the center until the angle between the axis of the second exhaust hole and the horizontal plane is 0°, the distance between the adjacent second exhaust holes closest to the end of the second exhaust cylinder 321 is D, the distance between the adjacent second exhaust holes decreases by A from both ends to the center of the second exhaust cylinder, and the diameter of the second exhaust hole on the second exhaust cylinder 321 gradually increases from both ends to the center.
[0032] When the combustible gas moves to the curved surface of the lower surface of the guide plate, the curved surface can buffer the combustible gas, so that the flow rate of the combustible gas decreases, the contact time of the combustible gas after the flow rate decreases and the air at the second exhaust cylinder is prolonged, so that they can fully react. At the same time, the guide plate can avoid the combustible gas to stay at the connection between the second exhaust cylinder and the baffle plate, and avoid the insufficient reaction of the combustible gas and the air out of the second exhaust cylinder.
[0033] In order to ensure that the combustible gas can fully react with the air sprayed in the corresponding second exhaust cylinder, it is necessary to change the angle of the external air spray. When the angle changes, the contact area between the external air and the combustible gas increases, making the combustion more complete. The air flow rate at both ends of the second exhaust cylinder is fast. In order to ensure the overall exhaust effect of the second exhaust cylinder, the arrangement of the second exhaust holes on the second exhaust cylinder gradually changes from both ends to the middle, making the exhaust volume of each second exhaust hole on the second exhaust cylinder consistent, so that the combustible gas can fully burn with the air. The diameter of the second exhaust hole gradually increases from both ends to the center of the second exhaust cylinder, so that the exhaust volume of the second exhaust hole on the second exhaust cylinder is close, so that the air and the combustible gas can fully mix and burn.
Claims
1. A fireplace with high combustion efficiency, characterized by: The fireplace body (1) is provided with a combustion chamber (2), the top of the fireplace body (1) is provided with a discharge port (11) for communicating with the outside and the combustion chamber, the bottom of the fireplace body (1) is provided with a main air inlet hole (12) for communicating with the combustion chamber, the combustion chamber (2) is provided with a secondary air inlet assembly (3), the secondary air inlet assembly (3) comprises a first exhaust duct (31) and a second exhaust duct module (32), the first exhaust duct (31) is arranged at the rear side of the combustion chamber (2), the second exhaust duct module (32) is arranged at the front side of the first exhaust duct (31), the rear side of the fireplace body (1) is provided with a secondary air inlet hole (33), the secondary air inlet hole (33) is communicated with the first exhaust duct (31), the first exhaust duct (31) and the second exhaust duct module (32) are communicated through an air duct assembly (4), the front side of the first exhaust duct (31) is provided with a plurality of left-right first exhaust holes, the second exhaust duct module (32) comprises a plurality of second exhaust ducts (321) arranged in front of and behind each other, the front side of the second exhaust duct (321) is provided with a plurality of left-right second exhaust holes, the second exhaust duct (321) is two, the distance between the second exhaust duct (321) at the rear side and the first exhaust duct (31) is less than the distance between the two second exhaust ducts (321), the plurality of second exhaust ducts (321) are arranged in a straight line from rear to front and upwardly inclined, the air duct assembly (4) comprises a connecting block (41) arranged symmetrically left and right, the connecting block (41) is fixedly connected with the side wall of the corresponding side combustion chamber (2), the connecting block (41) is hollow and communicated with the first exhaust duct (31) and the two second exhaust ducts (321), the secondary air inlet assembly (3) further comprises a flow baffle (34), the flow baffle (34) is arranged from rear to front and upwardly inclined, the first exhaust duct (31) and the second exhaust duct module (32) are arranged at the bottom of the flow baffle (34), a guide plate (35) is arranged between the rear side of the second exhaust duct (321) and the flow baffle (34), the top of the guide plate (35) is in contact with the bottom of the flow baffle (34), the bottom of the guide plate (35) is in contact with the lowest point of the corresponding second exhaust duct (321), and a curved surface is formed on the lower surface of the guide plate (35).
2. The fireplace with high combustion efficiency according to claim 1, characterized in that: The second exhaust holes on the second exhaust duct are arranged from front to rear and upwardly inclined, and the extension line of the axis of the second exhaust hole intersects with the axis of the second exhaust duct (321).
3. The fireplace with high combustion efficiency according to claim 2, characterized in that: The angle between the axis of the second exhaust hole at the two ends of the second exhaust duct (321) and the horizontal plane is 50°, and the angle between the axes of adjacent second exhaust holes decreases by 10° from both ends to the middle until the angle between the axis of the second exhaust hole and the horizontal plane is 0°.
4. The fireplace with high combustion efficiency according to claim 2 or 3, characterized in that: The distance between the adjacent second exhaust holes closest to the end of the second exhaust duct (321) is D, and the distance between the adjacent second exhaust holes decreases by A from both ends to the center of the second exhaust duct.
5. The fireplace with high combustion efficiency according to claim 4, characterized in that: The hole diameter of the second exhaust hole on the second exhaust duct (321) gradually increases from both ends to the center.
Citation Information
Patent Citations
Fireplace with high combustion efficiency
CN220958541U
Hybrid wood burning fireplace assembly
US20110220090A1