Silent diesel stove

Abstract

The utility model provides a silent diesel oil stove which comprises a shell, a furnace end installation opening is formed in the top of the shell, a furnace end is arranged in the shell, the furnace end comprises an inner cylinder with the top open and the bottom sealed and an outer cylinder located on the outer side of the inner cylinder, the outer cylinder and the inner cylinder are arranged in a spaced mode, and the outer cylinder is connected with an air inlet fan supplying air into the outer cylinder. A plurality of lower air inlet holes are formed in the outer wall of the lower end of the inner cylinder at intervals in the circumferential direction, and a plurality of upper air inlet holes are formed in the outer wall of the upper end of the inner cylinder at intervals in the circumferential direction; a flame blocking fairing with the horizontal height lower than that of the upper air inlet hole is arranged in the inner cylinder, and the flame blocking fairing and the inner wall of the inner cylinder are arranged in a spaced mode to form an annular air outlet groove. An ignition head, a temperature measuring head and an oil inlet nozzle which are located below the flame blocking fairing are further arranged in the inner cylinder. The gas stove has the advantages of being low in working noise, good in combustion effect, high in heat energy utilization rate and good in safety.

Description

Technical Field

[0001] The utility model relates to the field of diesel stoves, in particular to a silent diesel stove. Background Art

[0002] When the current diesel stove is working, in order to ensure its atomization effect, it is necessary to use the Venturi effect to atomize the diesel (fuel) through pressurization and other means to achieve combustion. This results in a relatively high noise level during overall operation, which can generally reach 70-80 decibels. At the same time, when using the Venturi principle to achieve atomization, not only the atomization effect (air pressure, flow rate) produced by fluid mechanics must be considered, but also the mixing ratio. Therefore, various external parameters will affect the efficiency of full combustion. In order to ensure the atomization effect, increasing the air pressure and flow rate will increase the air flow rate at the burner head, resulting in a large amount of heat loss. Utility Model Content

[0003] Based on the above problems, the purpose of the utility model is to provide a silent diesel stove with low working noise, good combustion effect, high thermal energy utilization rate and good safety.

[0004] In view of the above problems, the following technical solutions are provided: a silent diesel stove, comprising a shell, a burner mounting opening is provided on the top of the shell, a burner is provided in the shell, the burner comprises an inner cylinder with an open top and a sealed bottom, an outer cylinder located outside the inner cylinder and spaced apart from the inner cylinder, the outer cylinder is connected to an intake fan for supplying air into the outer cylinder, a plurality of lower air inlet holes spaced apart along the circumferential direction are provided on the outer wall of the lower end of the inner cylinder, a plurality of upper air inlet holes spaced apart along the circumferential direction are provided on the outer wall of the upper end of the inner cylinder; a flame-blocking hood is provided in the inner cylinder, the horizontal height of which is lower than the upper air inlet hole, the flame-blocking hood and the inner wall of the inner cylinder are spaced apart to form an annular air outlet groove, a collecting ring spaced apart from the flame-blocking hood is provided below the flame-blocking hood; an ignition head, a temperature measuring head and an oil inlet nozzle are also provided below the flame-blocking hood.

[0005] In the above structure, the fuel inlet nozzle supplies fuel into the inner cylinder, which is ignited by the ignition head, so that the inner cylinder and the flame shield are heated up, and at the same time, excess fuel gathers at the bottom of the inner cylinder, and the gasification effect is improved by high-temperature evaporation; the intake fan draws external air into the outer cylinder, so that air is supplied from the lower air inlet hole of the inner cylinder to ignite the fuel at the bottom of the inner cylinder and realize preheating and temperature rise, and when the fuel vapor goes up to the upper air inlet hole, it mixes and burns with the air entering from the upper air inlet hole, and the heat is discharged from the top of the inner cylinder; the flame shield is used to shield the flame, so that the flame and fuel vapor at the bottom of the inner cylinder can be dispersed to the surroundings, which in disguise increases the size of the fire outlet and improves the position of the upper air inlet hole. The combustion efficiency is improved to avoid the flame being concentrated in the center of the inner tube. The upper and lower air inlet holes can reduce the air flow speed while increasing the air output, stabilize the air flow, make the flame more stable, and achieve full combustion. The flame shield can also use its own temperature to burn the carbides produced by the incomplete combustion of the fuel at the bottom of the inner tube; its noise is reduced from the traditional 70-80 decibels to 40 decibels; the temperature measuring head is used to detect the temperature of the bottom of the inner tube for flameout protection; the outer edge of the collector ring is connected to the inner wall of the inner tube, and the ring hole diameter of the collector ring is smaller than the outer diameter of the flame shield, so that the flame at the bottom of the inner tube can gather to heat the flame shield while assisting in stabilizing the flow.

[0006] The utility model is further configured such that a flow stabilizer extending from top to bottom and close to the bottom of the outer cylinder is provided between the inner cylinder and the outer cylinder, an outer interlayer is formed between the flow stabilizer and the outer cylinder, and an inner interlayer is formed between the flow stabilizer and the inner cylinder, the air intake fan draws external air into the outer interlayer and then reaches the inner interlayer through the lower end of the flow stabilizer; the cross-sections of the inner cylinder and the flow stabilizer are both circular and are arranged concentrically with each other.

[0007] In the above structure, the air supplied by the intake fan will generate different wind pressures around the inner cylinder, resulting in the flow rate of the upper air inlet hole and the lower air inlet hole being difficult to be consistent. The provision of a flow stabilizer can make the air supplied by the intake fan to the outer interlayer first impact on the flow stabilizer, and then descend through the lower end of the flow stabilizer to enter the inner interlayer, thereby reducing the generation of turbulence and helping to improve combustion stability. During operation, the temperature of the inner cylinder is extremely high, so the heat radiation generated will reach the flow stabilizer and then reach the outer cylinder, causing the operating temperature of the inner cavity of the shell to rise. When the air enters the outer interlayer, it can take away the heat of the outer interlayer to preheat the air, and then take away the heat of the inner interlayer when passing through the inner interlayer, and further preheat the air, which is beneficial to improving combustion efficiency. At the same time, it can take away heat through air flow, reduce heat radiation, and achieve the purpose of lowering the operating temperature inside the shell.

[0008] The utility model is further configured that the flame-blocking fairing is concentrically arranged with the inner cylinder; and the outer edge of the flame-blocking fairing is turned down to form a fairing retaining edge.

[0009] In the above structure, the flame shield and the inner tube are arranged concentrically, and cooperate with the flow-rectifying rib to stabilize the upward airflow at the bottom of the inner tube.

[0010] The utility model is further configured that the surface of the flame-blocking fairing is convex near the center to form a heat collecting portion, and the flame-outlet hole is provided near the outer edge of the flame-blocking fairing.

[0011] In the above structure, the upwardly convex heat collecting part can be used to collect carbides produced by incomplete combustion of the flame at the bottom of the inner tube. The flame outlet hole can allow the mixed gas to burn near the heat collecting part, thereby increasing the temperature of the heat collecting part and assisting the combustion of attached carbides.

[0012] The utility model is further configured that an oil net is provided at the bottom of the inner cavity of the inner cylinder.

[0013] In the above structure, the oil net is made of glass fiber and is used to ignite the fuel. At the same time, when the fuel drips into the oil net, the fuel can soak the oil net and increase the contact area with the air.

[0014] The utility model is further configured that a heat insulation bracket is provided between the bottom of the inner tube and the bottom of the inner cavity of the outer tube.

[0015] In the above structure, the insulation bracket is used to support the inner tube and the outer tube, while reducing the heat transfer from the inner tube to the outer tube; an insulation board is also provided between the insulation bracket and the bottom of the inner tube to shield the heat radiation of the inner tube and take away the heat when the air flows.

[0016] The utility model is further configured that the upper air inlet holes are divided into a plurality of groups, which are spaced apart from each other along the axial direction of the inner cylinder.

[0017] In the above structure, the upper air inlet holes are the main combustion part, and several groups are arranged to increase the firepower.

[0018] The utility model is further configured such that a heat-insulating tube arranged around the outer tube is also provided in the shell, and a heat-insulating cavity is formed between the outer tube and the heat-insulating tube; the heat-insulating tube is provided with a first heat-dissipating port connected to the inner cavity of the shell, and the shell is also provided with a second heat-dissipating port arranged around the furnace head mounting port and connected to the heat-insulating cavity.

[0019] In the above structure, the shell is provided with a cooling fan, which inputs external air into the shell to form a positive pressure inside the shell. At this time, the air inside the shell will enter the insulation cavity through the first heat dissipation port, take away the heat of the outer cylinder and be discharged from the second heat dissipation port, further reducing the temperature inside the shell. At the same time, air flow is also formed around the burner head installation port, reducing heat transfer and heat radiation from the burner head to the burner head installation port.

[0020] The utility model is further configured to include a fire dividing hood installed on the burner head, the lower end of the fire dividing hood is provided with a closing opening whose inner diameter is smaller than the inner diameter of the inner tube, the upper end of the fire dividing hood is provided with a trumpet-shaped diffusion bowl, the diffusion bowl is provided with a fire dividing plate, the fire dividing plate is provided with a plurality of fire dividing holes arranged at intervals along its circumferential direction and opened along its radial direction; a fire dividing net arranged at intervals therefrom is provided above the fire dividing plate.

[0021] In the above structure, the fire dividing cover is detachable. When the fire dividing cover is removed, the closing mouth gathers the flame, which is suitable for round-bottomed cookware. When the fire dividing cover is installed at the closing mouth, the flame heats the fire dividing sheet, and then heats the fire dividing net through the fire dividing holes to avoid heat concentration, which is suitable for cookware such as frying pans.

[0022] The utility model is further configured such that the second heat dissipation port is located below the diffusion bowl; the top of the shell is also provided with an annular water retaining groove arranged around the burner mounting port, and the inner groove wall of the annular water retaining groove extends upward to approach the diffusion bowl and forms a heat dissipation gap between the diffusion bowl.

[0023] In the above structure, the heat dissipation gap can reduce the heat radiation of the furnace head to the annular water retaining groove, and at the same time, the air discharged through the second heat dissipation port is cooled and isolated.

[0024] The utility model is further configured that the housing is also provided with a control panel.

[0025] In the above structure, the control panel is used to install control buttons and display screen.

[0026] The utility model is further configured that an oil pump for supplying oil to the oil nozzle is arranged inside the housing.

[0027] The beneficial effects of the utility model are as follows: the fuel is supplied into the inner cylinder by the oil inlet nozzle, ignited by the ignition head, so that the temperature of the inner cylinder and the flame shield is increased, and at the same time, the excess fuel is gathered at the bottom of the inner cylinder, and the gasification effect is improved by high-temperature evaporation; the air intake fan draws external air into the outer cylinder, so that air is supplied from the lower air inlet hole of the inner cylinder to ignite the fuel at the bottom of the inner cylinder and realize preheating and temperature increase, and when the fuel vapor goes up to the upper air inlet hole, it is mixed with the air entering from the upper air inlet hole and burns, and the heat is discharged from the top of the inner cylinder; the flame shield is used to shield the flame, so that the flame and fuel vapor at the bottom of the inner cylinder can be dispersed to the surroundings, thereby increasing the size of the fire outlet in disguise and improving the upper air inlet hole. The combustion efficiency of the hole position can avoid the flame being concentrated in the center of the inner tube. The upper and lower air inlet holes can reduce the air flow speed while increasing the air output, stabilize the air flow, make the flame more stable, and achieve full combustion. The flame shield can also use its own temperature to burn the carbides produced by the incomplete combustion of the fuel at the bottom of the inner tube; its noise is reduced from the traditional 70-80 decibels to 40 decibels; the temperature measuring head is used to detect the temperature of the bottom of the inner tube for flameout protection; the outer edge of the collector ring is connected to the inner wall of the inner tube, and the ring hole diameter of the collector ring is smaller than the outer diameter of the flame shield, so that the flame at the bottom of the inner tube can gather to heat the flame shield while assisting in stabilizing the flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model from the first perspective.

[0029] Figure 2 It is a schematic diagram of the overall second viewing angle stereoscopic structure of the utility model.

[0030] Figure 3 It is a schematic diagram of the internal three-dimensional structure of the shell of the utility model.

[0031] Figure 4 It is a schematic diagram of the full cutaway three-dimensional structure of the utility model.

[0032] Figure 5 It is a schematic diagram of the three-dimensional structure of the heat insulation tube of the utility model from the first perspective.

[0033] Figure 6 It is a schematic diagram of the three-dimensional structure of the heat insulation tube of the utility model from a second viewing angle.

[0034] Figure 7 For this utility model Figure 5 Schematic diagram of the explosion three-dimensional structure.

[0035] Figure 8 It is a schematic diagram of a first cutaway three-dimensional structure of a furnace head of the utility model.

[0036] Fig. 9 It is a schematic diagram of the second cutaway three-dimensional structure of the furnace head of the utility model.

[0037] Fig.10 For this utility model Fig. 9 Schematic diagram of the second perspective stereoscopic structure.

[0038] Meaning of the numbers in the figure: 10-shell; 101-burner installation port; 11-intake fan; 12-cooling fan; 13-control panel; 131-control button; 132-display screen; 14-oil pump; 20-burner; 21-inner tube; 211-lower air inlet; 212-upper air inlet; 213-closing; 22-outer tube; 23-flame fairing; 231-rectifying rib; 232-heat collecting part; 233-flame outlet; 24 - ignition head; 25- temperature measuring head; 26- oil inlet nozzle; 27- flow stabilizing tube; 28- collecting ring; 30- heat insulation bracket; 31- heat insulation board; 40- heat insulation tube; 41- first heat dissipation port; 42- second heat dissipation port; 50- fire distribution cover; 51- diffusion bowl; 52- fire distribution plate; 521- fire distribution hole; 53- fire distribution net; 60- annular water retaining groove; a- annular air outlet groove; b- outer interlayer; c- inner interlayer; d- heat insulation cavity; e- heat dissipation seam. DETAILED DESCRIPTION

[0039] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0040] refer to Figures 1 to 10 ,like Figures 1 to 10 A silent diesel stove is shown, comprising a shell 10, a burner installation opening 101 is provided on the top of the shell 10, a burner 20 is provided in the shell 10, the burner 20 comprises an inner cylinder 21 with an open top and a sealed bottom, an outer cylinder 22 is arranged outside the inner cylinder 21 and spaced from the inner cylinder 21, the outer cylinder 22 is connected to an intake fan 11 for supplying air into the outer cylinder 22, a plurality of lower air inlet holes 211 are arranged spaced from each other along the circumferential direction of the inner cylinder 21, and the outer wall at the lower end of the inner cylinder 21 is provided with The outer wall of the upper end of the inner tube 21 is provided with a plurality of upper air inlet holes 212 spaced apart along its circumferential direction; the inner tube 21 is provided with a flame-blocking hood 23 whose horizontal height is lower than the upper air inlet holes 212, the flame-blocking hood 23 is spaced apart from the inner wall of the inner tube 21 to form an annular air outlet groove a, and a collecting ring 28 spaced apart from the flame-blocking hood 23 is provided below the flame-blocking hood 23; the inner tube 21 is also provided with an ignition head 24, a temperature measuring head 25 and an oil inlet nozzle 26 located below the flame-blocking hood 23.

[0041] In the above structure, the fuel inlet nozzle 26 supplies fuel into the inner cylinder 21, which is ignited through the ignition head 24, so that the inner cylinder 21 and the flame shield 23 are heated, and at the same time, the excess fuel gathers at the bottom of the inner cylinder 21, and the gasification effect is improved by high-temperature evaporation; the air intake fan 11 draws external air into the outer cylinder 22, so that the air is supplied from the lower air inlet hole 211 of the inner cylinder 21 to ignite the fuel at the bottom of the inner cylinder 21 and realize preheating and temperature rise, and when the fuel vapor goes up to the upper air inlet hole 212, it is mixed with the air entering from the upper air inlet hole 212 and burns, and the heat is discharged from the top of the inner cylinder 21; the flame shield 23 is used to shield the flame, so that the flame and fuel vapor at the bottom of the inner cylinder 21 can be dispersed to the surroundings, which in disguise increases the size of the fire outlet and improves the upper air inlet hole 212. The combustion efficiency at the position of the hole 212 can prevent the flame from being concentrated in the center of the inner tube 21. The upper air inlet hole 212 and the lower air inlet hole 211 can reduce the air flow speed while increasing the air output, stabilize the air flow, make the flame more stable, and achieve full combustion. The flame shield 23 can also burn the carbides produced by the incomplete combustion of the fuel at the bottom of the inner tube 21 through its own temperature; its noise is reduced from the traditional 70-80 decibels to 40 decibels; the temperature measuring head 25 is used to detect the temperature at the bottom of the inner tube 21 for flameout protection; the outer edge of the collecting ring 28 is connected to the inner wall of the inner tube 21, and the ring hole diameter of the collecting ring 28 is smaller than the outer diameter of the flame shield 23, so that the flame at the bottom of the inner tube 21 can gather and heat the flame shield 23 while assisting in stabilizing the flow.

[0042] In this embodiment, a flow stabilizer 27 extending from top to bottom and close to the bottom of the outer cylinder 22 is provided between the inner cylinder 21 and the outer cylinder 22. An outer interlayer b is formed between the flow stabilizer 27 and the outer cylinder 22, and an inner interlayer c is formed between the flow stabilizer 27 and the inner cylinder 21. The air intake fan 11 draws external air into the outer interlayer b and then reaches the inner interlayer c through the lower end of the flow stabilizer 27. The cross-sections of the inner cylinder 21 and the flow stabilizer 27 are both circular and are concentrically arranged with each other.

[0043] In the above structure, the air supplied by the intake fan 11 will generate different wind pressures around the inner cylinder 21, resulting in the flow rate of the upper air inlet hole 212 and the lower air inlet hole 211 being difficult to be consistent. The provision of the flow stabilizer 27 can make the air supplied by the intake fan 11 to the outer interlayer b first impact on the flow stabilizer 27, and then flow downward through the lower end of the flow stabilizer 27 to enter the inner interlayer c, thereby reducing the generation of turbulence and helping to improve combustion stability. During operation, the temperature of the inner cylinder 21 is extremely high, so the heat radiation generated will reach the flow stabilizer 27 and then reach the outer cylinder 22, causing the working temperature of the inner cavity of the shell 10 to rise. When the air enters the outer interlayer b, it can take away the heat of the outer interlayer b to preheat the air, and then take away the heat of the inner interlayer c when passing through the inner interlayer c, and further preheat the air, which is beneficial to improving combustion efficiency. At the same time, it can take away heat through air flow, reduce heat radiation, and achieve the purpose of lowering the working temperature inside the shell 10.

[0044] In this embodiment, the flame-blocking fairing hood 23 is arranged concentrically with the inner tube 21 ; the outer edge of the flame-blocking fairing hood 23 is turned down to form a fairing rib 231 .

[0045] In the above structure, the flame shield 23 is concentrically arranged with the inner tube 21 , and cooperates with the flow-rectifying rib 231 to stabilize the upward airflow at the bottom of the inner tube 21 .

[0046] In this embodiment, the surface of the flame-blocking fairing 23 is convex near the center to form a heat collecting portion 232, and the flame-blocking fairing 23 is provided with a flame outlet hole 233 near the outer edge.

[0047] In the above structure, the upwardly convex heat collecting part 232 can be used to collect carbides produced by incomplete combustion of the flame at the bottom of the inner tube 21, and the flame outlet hole 233 can cause the mixed gas to burn near the heat collecting part 232, thereby increasing the temperature of the heat collecting part 232 and assisting the combustion of attached carbides.

[0048] In this embodiment, an oil net (not shown in the figure) is provided at the bottom of the inner cavity of the inner cylinder 21 .

[0049] In the above structure, the oil net (not shown in the figure) is made of glass fiber and is used to ignite the fuel. At the same time, when the fuel drips into the oil net (not shown in the figure), the fuel can penetrate the oil net (not shown in the figure) to increase the contact area with the air.

[0050] In this embodiment, a heat insulation bracket 30 is provided between the bottom of the inner tube 21 and the bottom of the inner cavity of the outer tube 22 .

[0051] In the above structure, the insulation bracket 30 is used to support the inner tube 21 and the outer tube 22, while reducing the heat transfer from the inner tube 21 to the outer tube 22; an insulation board 31 is also provided between the insulation bracket 30 and the bottom of the inner tube 21 to shield the heat radiation of the inner tube 21 and take away the heat when the air flows.

[0052] In this embodiment, the upper air inlet holes 212 are divided into a plurality of groups and are spaced apart from each other along the axial direction of the inner cylinder 21 .

[0053] In the above structure, the upper air inlet holes 212 are the main combustion part, and several groups are arranged to increase the firepower.

[0054] In this embodiment, the shell 10 is further provided with an insulating tube 40 arranged around the outer tube 22, and an insulating cavity d is formed between the outer tube 22 and the insulating tube 40; the insulating tube 40 is provided with a first heat dissipation port 41 connected to the inner cavity of the shell 10, and the shell 10 is also provided with a second heat dissipation port 42 arranged around the furnace head mounting port 101 and connected to the insulating cavity d.

[0055] In the above structure, the shell 10 is provided with a cooling fan 12, and the cooling fan 12 inputs external air into the shell 10 to form a positive pressure inside the shell 10. At this time, the air inside the shell 10 will enter the insulation cavity d through the first heat dissipation port 41, take away the heat of the outer cylinder 22 and be discharged from the second heat dissipation port 42, further reducing the temperature inside the shell 10. At the same time, air flow is also formed around the burner installation port 101, reducing heat transfer and heat radiation from the burner 20 to the burner installation port 101.

[0056] In the present embodiment, it also includes a fire dividing hood 50 installed on the burner head 20, and the lower end of the fire dividing hood 50 is provided with a closing opening 213 whose inner diameter is smaller than the inner diameter of the inner tube 21, and the upper end of the fire dividing hood 50 is provided with a trumpet-shaped diffusion bowl 51, and the diffusion bowl 51 is provided with a fire dividing plate 52, and the fire dividing plate 52 is provided with a plurality of fire dividing holes 521 arranged at intervals along its circumferential direction and opened along its radial direction; above the fire dividing plate 52 is provided a fire dividing net 53 arranged at intervals therefrom.

[0057] In the above structure, the fire dividing cover 50 is detachable. When the fire dividing cover 50 is removed, the closing mouth 213 gathers the flame, which is suitable for round-bottomed cookware. When the fire dividing cover 50 is installed at the closing mouth 213, the flame heats the fire dividing plate 52, and then heats the fire dividing net 53 through the fire dividing hole 521 to avoid heat concentration, which is suitable for cookware such as frying pans.

[0058] In this embodiment, the second heat dissipation port 42 is located below the diffusion bowl 51; the top of the shell 10 is also provided with a circle of annular water retaining groove 60 arranged around the burner mounting port 101, and the inner groove wall of the annular water retaining groove 60 extends upward to the diffusion bowl 51 and forms a heat dissipation gap e between the diffusion bowl 51.

[0059] In the above structure, the heat dissipation gap e can reduce the heat radiation of the furnace head 20 to the annular water retaining groove 60, and at the same time, the air discharged through the second heat dissipation port 42 is cooled and isolated.

[0060] In this embodiment, the housing 10 is further provided with a control panel 13 .

[0061] In the above structure, the control panel 13 is used to install the control buttons 131 and the display screen 132 .

[0062] In this embodiment, an oil pump 14 for supplying oil to the oil nozzle 26 is disposed in the housing 10 .

[0063] The beneficial effects of the utility model are as follows: the fuel is supplied into the inner cylinder 21 by the oil inlet nozzle 26, and ignited by the ignition head 24, so that the temperature of the inner cylinder 21 and the flame shield 23 is increased, and at the same time, the excess fuel is gathered at the bottom of the inner cylinder 21, and the gasification effect is improved by high-temperature evaporation; the air intake fan 11 draws external air into the outer cylinder 22, so that the air is supplied from the lower air inlet hole 211 of the inner cylinder 21 to ignite the fuel at the bottom of the inner cylinder 21 and realize preheating and temperature increase, and when the fuel vapor ascends to the position of the upper air inlet hole 212, it is mixed with the air entering from the upper air inlet hole 212 and burns, and the heat is discharged from the top of the inner cylinder 21; the flame shield 23 is used to shield the flame, so that the flame and fuel vapor at the bottom of the inner cylinder 21 can be dispersed to the surroundings, thereby increasing the size of the fire outlet in disguise and improving the upper The combustion efficiency at the position of the air inlet 212 can prevent the flame from being concentrated in the center of the inner tube 21. The upper air inlet 212 and the lower air inlet 211 can reduce the air flow speed while increasing the air output, stabilize the air flow, make the flame more stable, and achieve full combustion. The flame shield 23 can also use its own temperature to burn the carbides produced by the incomplete combustion of the fuel at the bottom of the inner tube 21; its noise is reduced from the traditional 70-80 decibels to 40 decibels; the temperature measuring head 25 is used to detect the temperature at the bottom of the inner tube 21 for flameout protection; the outer edge of the collecting ring 28 is connected to the inner wall of the inner tube 21, and the ring hole diameter of the collecting ring 28 is smaller than the outer diameter of the flame shield 23, so that the flame at the bottom of the inner tube 21 can gather and heat the flame shield 23 while assisting in stabilizing the flow.

[0064] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications of the above assumptions should also be regarded as the protection scope of the present invention.

Claims

1. A silent diesel stove, comprising a shell, a burner installation opening is provided on the top of the shell, and a burner is provided inside the shell, characterized in that: The furnace head includes an inner cylinder with an open top and a sealed bottom, an outer cylinder located outside the inner cylinder and spaced apart from the inner cylinder, the outer cylinder is connected to an air intake fan for supplying air into the outer cylinder, the outer wall at the lower end of the inner cylinder is provided with a plurality of lower air inlet holes spaced apart along its circumferential direction, the outer wall at the upper end of the inner cylinder is provided with a plurality of upper air inlet holes spaced apart along its circumferential direction; a flame-blocking hood is provided in the inner cylinder with a horizontal height lower than the upper air inlet hole, the flame-blocking hood and the inner wall of the inner cylinder are spaced apart to form an annular air outlet groove; an ignition head, a temperature measuring head and an oil inlet nozzle are also provided in the inner cylinder below the flame-blocking hood.

2. A silent diesel stove according to claim 1, characterized in that: A flow stabilizer extending from top to bottom and close to the bottom of the outer cylinder is provided between the inner cylinder and the outer cylinder, an outer interlayer is formed between the flow stabilizer and the outer cylinder, and an inner interlayer is formed between the flow stabilizer and the inner cylinder. The air intake fan draws external air into the outer interlayer and then reaches the inner interlayer through the lower end of the flow stabilizer. The cross-sections of the inner cylinder and the flow stabilizer are both circular and are concentrically arranged with each other.

3. A silent diesel stove according to claim 1, characterized in that: The flame-blocking fairing is arranged concentrically with the inner cylinder; the outer edge of the flame-blocking fairing is turned down to form a fairing rib.

4. A silent diesel stove according to claim 3, characterized in that: The surface of the flame-blocking fairing is convex near the center to form a heat collecting portion, and the flame-outlet hole is arranged near the outer edge of the flame-blocking fairing.

5. The silent diesel stove according to claim 1, characterized in that: An oil net is arranged at the bottom of the inner cavity of the inner cylinder.

6. A silent diesel stove according to claim 1, characterized in that: A heat insulation bracket is arranged between the bottom of the inner cylinder and the bottom of the inner cavity of the outer cylinder.

7. The silent diesel stove according to claim 1, characterized in that: The upper air inlet holes are divided into a plurality of groups and are spaced apart from each other along the axial direction of the inner cylinder.

8. The silent diesel stove according to claim 1, characterized in that: The shell is also provided with an insulating tube arranged around the outer tube, and an insulating cavity is formed between the outer tube and the insulating tube; the insulating tube is provided with a first heat dissipation port connected to the inner cavity of the shell, and the shell is also provided with a second heat dissipation port arranged around the furnace head installation port and connected to the insulating cavity.

9. A silent diesel stove according to claim 8, characterized in that: It also includes a fire dividing hood installed on the burner head, wherein the lower end of the fire dividing hood is provided with a closing opening whose inner diameter is smaller than the inner diameter of the inner tube, the upper end of the fire dividing hood is provided with a trumpet-shaped diffusion bowl, the diffusion bowl is provided with a fire dividing plate, the fire dividing plate is provided with a plurality of fire dividing holes which are arranged at intervals along its circumferential direction and opened along its radial direction; a fire dividing net which is arranged at intervals above the fire dividing plate is provided.

10. A silent diesel stove according to claim 9, characterized in that: The second heat dissipation port is located below the diffusion bowl; the top of the shell is also provided with an annular water retaining groove arranged around the burner mounting port, and the inner groove wall of the annular water retaining groove extends upward to approach the diffusion bowl and forms a heat dissipation gap between the diffusion bowl.

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