JP3684809B2 - Combustion equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a combustion apparatus used in a water heater or a heater using petroleum as fuel.
[0002]
[Prior art]
  A conventional combustion apparatus of this type has been described in Japanese Patent Application Laid-Open No. 09-112827. Hereinafter, this combustion apparatus will be described with reference to FIGS.
[0003]
  14 is a cross-sectional view of the main part of the entire combustion apparatus, FIG. 15 is a cross-sectional perspective view of the carburetor, and FIG. 16 is a cross-sectional view of the main part of the carburetor provided with fins.
[0004]
  The combustion apparatus includes a fuel supply means 3 for supplying liquid fuel to a vaporizer 2 equipped with a heater 1, an air supply means 5 for supplying combustion air to the vaporizer 2 and the burner 4, a burner 4 and a vaporizer 2. From a communicating mixing chamber 6 and a combustion chamber 7 provided downstream of the burner 4ConstitutionThe liquid fuel is supplied to the nozzle 8 by the fuel supply means 3, and the fuel is ejected from the nozzle 8 toward the vaporizer 2. Moreover, the burner 4 was comprised from the flame mouth part 9 which ejects an air-fuel | gaseous mixture, and the secondary air mouth part 10 which ejects secondary air. Further, the vaporizer 2 has a box shape having a vaporization surface 11 for vaporizing the liquid fuel provided with the heater 1, and an opening 13 for taking the liquid fuel and combustion air into the inflow surface 12 opposite to the vaporization surface 11. And an outlet 14 through which the air-fuel mixture flows out at the lower portion, and further, a carburetor rear surface 15 corresponding to the back side of the vaporization surface 11 is provided with fins 16 protruding on the burner 4, and this carburetor rear surface15And fins16Was configured to face the combustion chamber 7. Further, the fins 16 are provided so as to be positioned in the secondary air port 10.
[0005]
  The liquid fuel was supplied from the fuel supply means 3 to the nozzle 8, and the liquid fuel injected from the nozzle 8 was supplied to the vaporization surface 11 through the opening 13 of the vaporizer 2. The vaporizing surface 11 of the vaporizer 2 is heated by the heater 1, and the heated liquid fuel is vaporized to provide air supply means.3By vaporizer 2ofIt was mixed with part of the combustion air supplied from the opening 13 and supplied to the flame opening 9 of the burner 4 through the mixing chamber 6. The air-fuel mixture was ejected from the flame opening 9 into the combustion chamber 7, and the remainder of the combustion air was ejected from the secondary air opening 10 into the combustion chamber 7. A flame is formed in the combustion chamber 7 by the air-fuel mixture ejected from the flame port 9 and the combustion air ejected from the secondary air port 10, and the heat of this flame is located in the secondary air port 10. The carburetor 2 is secondarily heated by being received by the fins 16.
[0006]
[Problems to be solved by the invention]
  However, in the above-described conventional combustion apparatus, the fin 16 is provided at the position of the secondary air port 10, so that it is cooled by a normal temperature air flow ejected from the secondary air port 10 and receives sufficient heat from the flame. There was a problem that the power consumption of the heater 1 could not be reduced. Further, since the heat received from the flame cannot be sufficiently received, the fins 16 have to be enlarged, and there is a problem that it is difficult to make the vaporizer 2 compact.
[0007]
[Means for Solving the Problems]
  In order to solve the above-mentioned problems, the present invention ejects a vaporizer that vaporizes liquid fuel equipped with a heater, a mixing chamber connected to the vaporizer, and an air-fuel mixture supplied via the mixing chamber.pluralThe mouth of the flameLocated between the plurality of flame openings,The burner is composed of a burner provided with a secondary air outlet for jetting air and provided at the upper part of the mixing chamber.The upper part with the flame port and secondary air portThe fin provided on the back surface of the carburetor so as to protrude to the position is located between the flame port and the secondary air port.
[0008]
  According to the above invention, since the fin is provided between the flame port and the secondary air port, the flame formed at the flame port directly contacts the fin, so that a high temperature can be received by the fin. In addition, the heat receiving area can be increased by installing a plurality of fins within a distance of 1 pitch in the flame port, so that more heat can be received, and the power supplied to the heater can be suppressed, thereby saving power. In addition, the carburetor can be made compact because the fins can be made smaller.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
  A combustion apparatus according to claim 1 of the present invention ejects a vaporizer that vaporizes liquid fuel having a heater, a mixing chamber connected to the vaporizer, and an air-fuel mixture supplied via the mixing chamber.pluralThe mouth of the flameLocated between the plurality of flame openings,The burner is composed of a burner provided with a secondary air outlet for jetting air and provided at the upper part of the mixing chamber.The upper part with the flame port and secondary air portThe fin provided on the back of the carburetor so as to protrude in the position is positioned between the flame opening and the secondary air opening. Since the fin is provided between the flame port and the secondary air port, the flame formed at the flame port directly contacts the fin so that a high temperature can be received by the fin and the flame port By installing a plurality of fins within a 1-pitch distance, the heat receiving area can be increased, so that more heat can be received, vaporization performance can be improved, and power supplied to the heater can be reduced. Power saving can be achieved. In addition, since the fins can be reduced by the amount of heat received, the vaporizer can be made compact.
[0010]
  The present inventionClaim 2The combustion deviceA vaporizer for vaporizing liquid fuel provided with a heater, a mixing chamber connected to the vaporizer, a flame port portion for jetting the air-fuel mixture supplied through the mixing chamber, and a secondary air port for jetting air And a burner provided at the upper part of the mixing chamber, and the protrusion length of the fin provided on the back side of the vaporizer so as to protrude above the burner from the lower end to the upper end. Lengthen andThe lower end of the fin is cut in a step shape.If the length of the fin protruding to the burner is the same at the upper and lower ends, the amount of heat received from the flame at the fin increases because the flame is short and the amount of secondary air is small when the combustion amount is small. The fin is melted due to excessive rise, but the protrusion length of the fin to the burner side is longer than the lower end of the fin, so the flame expands when the combustion amount is large, and the entire fin receives heat from the flame. When the combustion amount is small, the flame is short and the amount of secondary air is small, so that the amount of heat received from the flame at the fin increases and the temperature of the fin rises too much to avoid melting the fin. The optimum amount of heat can be received from the fin even when the amount of combustion is changed. Further, since the weight of the fin can be reduced, the initial preheating time can be shortened.In addition, since the fin lower end has a stepped shape, when the combustion amount is large, the flame extends and heat can be received from the flame throughout the fin, and when the combustion amount is small, the flame is short and the amount of secondary air is small. Therefore, it can be avoided that the amount of heat received from the flame at the fin increases, the fin temperature rises too much and the fin melts, and even when the combustion amount is changed, the optimum amount of heat can be received from the fin. As a result, vaporization performance can be improved. Further, since the weight of the fin can be reduced, the initial preheating time can be shortened.
[0011]
  The present inventionClaim 3The combustion apparatus according to the present invention jets air, a vaporizer that vaporizes liquid fuel provided with a heater, a mixing chamber connected to the vaporizer, a flame outlet that jets the air-fuel mixture supplied through the mixing chamber, and air A fin provided on the back of the vaporizer so as to protrude above the burner is composed of a burner provided at the upper part of the mixing chamber with a secondary air port.,ThatThe thickness of the base portion on the back side of the vaporizer is made thicker than the thickness of the tip portion protruding to the burner side. If the thickness is uniform, the amount of heat transfer per unit volume of the fin increases as it reaches the base from the tip, causing the phenomenon of heat congestion at the base, and the heat receiving efficiency of the fin as a whole Although the thickness of the base part on the back side of the fin carburetor is thicker than the tip part, the amount of heat transfer per unit volume of the fin can be made uniform throughout the fin, and the heat received by the fin as a whole. The efficiency can be improved, the power supplied to the heater can be suppressed, power saving can be achieved, and the fins can be made smaller, so the carburetor can be made compact.
[0012]
  The present inventionClaim 4The combustion apparatus according to the present invention jets air, a vaporizer that vaporizes liquid fuel provided with a heater, a mixing chamber connected to the vaporizer, a flame outlet that jets the air-fuel mixture supplied through the mixing chamber, and air Of the fins provided on the back surface of the vaporizer so as to protrude above the burner, the fins located in the central part of the vaporizer are connected to the burner side. The protruding length is shorter than the fin located near the end. The flame formed by the burner is centered from the endInSince the flow is concentrated and the flame stands, there is a large amount of heat received at the center of the vaporizer, and conversely, the amount of heat received tends to be small near the end of the vaporizer. This also increases the temperature of the fins at the center, and the material tends to melt. Therefore, by shortening the fins at the center, abnormal temperature rise can be suppressed, and by increasing the fins near the ends, the amount of heat received can be increased and the vaporization performance can be improved. The amount of heat received can be made uniform. Therefore, it is possible to improve the vaporization at the end of the vaporization surface of the vaporizer, the heat reception efficiency of the vaporizer as a whole increases, the power supplied to the heater can be suppressed, power saving can be achieved, and the vaporizer as a whole can be reduced. Compactness can be achieved.
[0013]
  The present inventionClaim 5The combustion apparatus according to the present invention jets air, a vaporizer that vaporizes liquid fuel provided with a heater, a mixing chamber connected to the vaporizer, a flame outlet that jets the air-fuel mixture supplied through the mixing chamber, and air To the burner side of the fin located on the part where the heater is not in the vicinity, among the fins provided on the back of the vaporizer so as to protrude above the burner, which is composed of a burner provided with a secondary air port and provided at the upper part of the mixing chamber Is longer than the length of the fin located in the portion where the heater is in the vicinity. In the part without the heater, the heat of the vaporization surface depends on the fins, and the amount of heat received from the flame is required from the part with the heater, but the length of the fin located in the part without the heater in the burner direction is Since it is longer than the length of the fin located in the part in the vicinity, the heat received from the flame in the fin located in the part where the heater is not in the vicinity can be increased, and the vaporization performance can be improved, As a whole, the heat receiving efficiency is improved, the electric power supplied to the heater can be suppressed, power saving can be achieved, and the vaporizer can be made compact as a whole.
[0014]
【Example】
  Embodiments of the present invention will be described below with reference to the drawings.
[0015]
  Example 1
  FIG. 1 is a cross-sectional view of a main part of a combustion apparatus according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional perspective view of the vaporizer, FIG. 3 is a cross-sectional view of the main part when the vaporizer is viewed from the burner side, and FIG. 4 is a connection diagram.
[0016]
  In the figure, reference numeral 21 denotes a fuel supply means for supplying liquid fuel, and the liquid fuel is injected through a nozzle 22. 23 is an air supply means for supplying combustion air, 24 is a vaporizer provided with a heater 25, 26 is a burner, 27 is a mixing chamber for communicating the burner 26 and the vaporizer 24, and 28 is provided downstream of the burner 26. It is a combustion chamber. A back surface 29 of the carburetor 24 is provided so as to face the combustion chamber 28, and a fin 30 is provided on the back surface 29 of the carburetor 24 to receive heat from the flame formed in the combustion chamber 28. ing. The vaporizer 24 includes a heater 25 and a vaporization surface 31 that vaporizes the liquid fuel, a side surface 32 that contacts and surrounds the vaporization surface 31, an upper surface 33 that contacts the vaporization surface 31, and an outlet 34 that flows the mixture into the mixing chamber 27. And a box-like shape comprising an inflow surface 37 opposite to the vaporization surface 31 having an opening 36 for taking in liquid fuel and combustion air. Further, the burner 26 is a flame opening portion that ejects the air-fuel mixture supplied through the mixing chamber 27.38And a secondary air port 39 for ejecting combustion air supplied from the air supply means 23. A temperature detection means 40 is provided on the upper surface 33 of the vaporizer 24 to detect the temperature of the vaporization surface 31. Based on the temperature detected by the temperature detection means 40, the operation of the fuel supply means 21, the air supply means 23 and the heater 25 is controlled by the power supply control means 41. Further, the fin 30 provided on the back surface 29 of the vaporizer 24 is provided so as to be positioned between the flame port portion 38 and the secondary air port portion 39.
[0017]
  Next, the operation and action will be described. Liquid fuel is supplied from the fuel supply means 21 to the nozzle 22 and injected from the nozzle 22. On the other hand, the combustion air is supplied from the air supply means 23 into the carburetor 24 through the opening 36 and is also supplied to the secondary air port 39 of the burner 26. The liquid fuel injected from the nozzle 22 hits the vaporized surface 31 heated by the heater 25 and is vaporized. The vaporized fuel is mixed with the combustion air to form an air-fuel mixture, which is supplied from the outlet 34 to the burner 26 via the mixing chamber 27 and is ejected from the flame port 38 into the combustion chamber 28. The air-fuel mixture ejected from the flame port portion 38 and the combustion air ejected from the secondary air port portion chemically react, and combustion is performed in the combustion chamber 28 to form a flame. Heat is received from the flame in which the fins 30 provided between the flame port 38 and the secondary air port 39 are formed, and supplied to the vaporization surface 31 via the back surface 29 of the vaporizer 24.
[0018]
  When the temperature detected by the temperature detection means 40 is equal to or lower than a predetermined temperature, the power supply control means 41 performs control so that electric power is supplied to the heater 25, and electric power is supplied to the heater 25 and the vaporization surface 31 is heated. If the temperature detection means 40 detects that the temperature has reached a predetermined temperature, the liquid fuel is supplied from the fuel supply means 21 to the heated vaporization surface 31 and is vaporized, and the combustion is supplied from the air supply means 23. While being mixed with air, the gas is supplied from the outlet 34 to the burner 26 through the mixing chamber 27 and burned. Further, when the temperature detection means 40 detects a higher predetermined temperature and the temperature of the vaporization surface 31 becomes higher than necessary, the power supply control means 41 controls to stop the supply of power to the heater 25. In this manner, the temperature of the vaporization surface 31 is kept within a certain temperature range, whereby the optimal liquid fuel is vaporized.
[0019]
  Since the fin is provided between the flame opening portion 38 and the secondary air opening portion 39, the flame formed at the flame opening portion 38 is in direct contact with the fin 30, so that a high temperature can be received by the fin 30. Since the heat receiving area can be gained by installing the plurality of fins 30 within a pitch distance of the flame opening 38, more heat can be received, the vaporization performance can be improved, and the heater 25 The power to be supplied can be suppressed and power saving can be achieved. Moreover, since the fin 30 can be made small by the amount of heat received, the vaporizer 24 can be made compact.
[0020]
  (Example 2)
  FIG. 5 is a cross-sectional view of a main part of the carburetor of the combustion apparatus according to the second embodiment of the present invention as viewed from the burner side. The present embodiment will be described with reference to FIGS.
[0021]
  The difference from the first embodiment is that the fin 30 is provided so as to be positioned in the flame opening portion 38. Components having the same reference numerals as those of the first embodiment have the same structure and description thereof is omitted.
[0022]
  Next, the operation and action will be described. Since the fin 30 is provided so as to be positioned at the flame opening portion 38, the flame formed by the flame opening portion 38 directly contacts the fin 30 and is formed by the flame opening portion 38. Since the high temperature can be received by the fins 30 because it is enveloped by the flame, the fins 30 are not cooled by the secondary air, more heat can be received, and the vaporization performance can be improved. In addition, the power supplied to the heater 25 can be suppressed and power saving can be achieved. Moreover, since the fin 30 can be made small by the amount of heat received, the vaporizer 24 can be made compact.
[0023]
  (Example 3)
  FIG. 6 is a cross-sectional view of the main part of the carburetor of the combustion apparatus according to the third embodiment of the present invention as viewed from above. The present embodiment will be described with reference to FIGS.
[0024]
  The difference from the first embodiment is that the back surface 29 of the vaporizer 24 is formed in a shape with irregularities 42, corrugations 43 or grooves 44 in the vertical direction. In the present embodiment, an example in which the corrugated portion 42, the corrugated portion 43, or the groove 44 are provided with the corrugated portion 43 in the vertical direction on the back surface 29 of the vaporizer 24 will be described. Also, the same reference numerals as those in Examples 1 and 2 have the same structure, and the description thereof is omitted.
[0025]
  Next, the operation and action will be described. Since the back surface 29 of the carburetor 24 is formed into the surface of the corrugated shape 43 in the vertical direction, the area of the back surface 29 of the carburetor 24 can be increased. It is possible to easily receive the heat received from the flame formed by the back surface 29 of the vaporizer 24. Further, since the flame is formed along the back surface 29 of the corrugated shape 43 in the vertical direction, the heat receiving efficiency from the flame can be increased, so that the vaporization performance can be improved and the power supplied to the heater 25 can be suppressed. Thus, power saving can be achieved, and the fin 30 can be made small, so that the vaporizer 24 can be made compact.
[0026]
  Example 4
  FIG. 7 is a cross-sectional view of a main part of a carburetor of a combustion apparatus according to a fourth embodiment of the present invention as viewed from the side. The present embodiment will be described with reference to FIGS.
[0027]
  The difference from the first embodiment is that a portion of the fin 30 provided in the vicinity of the heater 25 in the rear surface 29 of the vaporizer 24 is cut so as to protrude on the burner 26. Components having the same reference numerals as those of the first embodiment have the same structure and description thereof is omitted.
[0028]
  Next, the operation and action will be described. When the fin 30 is in the vicinity 45 of the heater 25, the fin 30 also receives heat from the flame, but also receives a large amount of heat from the heater 25. Therefore, the heat receiving efficiency from the flame is high. Although it becomes worse, since the part located in the vicinity 45 of the heater 25 of the fin 30 is eliminated, heat can be received only from the flame, and heat loss of the heater 25 can be reduced. The power can be suppressed and power saving can be achieved, and the fin 30 can be made small, so that the vaporizer 24 can be made compact.
[0029]
  (Example 5)
  FIG. 8 is a cross-sectional view of a main part of a carburetor of a combustion apparatus according to a fifth embodiment of the present invention as viewed from the side. The present embodiment will be described with reference to FIGS.
[0030]
  The difference from the first embodiment is that the protrusion length of the fin 30 provided on the back surface 29 of the vaporizer 24 to the burner 26 side so as to protrude onto the burner 26 is longer at the upper end portion 47 than at the lower end portion 46. It is. Components having the same reference numerals as those of the first embodiment have the same structure and description thereof is omitted.
[0031]
  Next, the operation and action will be described. When the protrusion length of the fin 30 toward the burner 26 is the same at the lower end portion 46 and the upper end portion 47, the flame is short and the secondary air amount is small when the combustion amount is small. For this reason, the amount of heat received from the flame at the fin 30 increases and the temperature of the fin 30 rises too much, causing the fin 30 to melt. However, the length of the fin 30 protruding to the burner 26 side is set to the lower end 46 of the fin 30. Since the upper end 47 is made longer, the flame extends when the amount of combustion is large, and the fin 30 can receive heat from the flame as a whole, and when the amount of combustion is small, the flame is short and the amount of secondary air is small. Therefore, it can be avoided that the amount of heat received from the flame at the fin 30 increases and the temperature of the fin 30 rises too much and the fin 30 melts, and is optimal even when the combustion amount is changed. Amounts can be heat from the fins 30. Moreover, since the weight of the fin 30 can be reduced, the vaporizer 24 can be made compact and the initial preheating time can be shortened.
[0032]
  (Example 6)
  FIG. 9 is a cross-sectional view of a main part when a carburetor of a combustion apparatus according to a sixth embodiment of the present invention is viewed from the side. The present embodiment will be described with reference to FIGS.
[0033]
  The difference from the fifth embodiment is that the lower end portion 46 of the fin 30 is cut 48 obliquely. Components having the same reference numerals as those in the fifth embodiment have the same structure and description thereof is omitted.
[0034]
  Next, the operation and action will be described. Since the lower end portion 46 of the fin 30 on the burner 26 side is cut diagonally 48, when the combustion amount is large, the flame extends and the fin 30 can receive heat from the flame as a whole. When the amount of combustion is small, the flame is short and the amount of secondary air is small, so that the amount of heat received from the flame at the fin 30 increases and the temperature of the fin 30 rises too much and the fin 30 can be avoided from melting. Even when the amount of combustion is changed, the optimum amount of heat can be received from the fins 30, so that the vaporization performance can be improved. Moreover, since the weight of the fin 30 can be reduced, the vaporizer 24 can be made compact and the initial preheating time can be shortened.
[0035]
  (Example 7)
  FIG. 10 is a cross-sectional view of a main part of a carburetor of a combustion apparatus according to a seventh embodiment of the present invention as viewed from the side. The present embodiment will be described with reference to FIGS.
[0036]
  The difference from the fifth embodiment is that the lower end portion 46 of the fin 30 is cut into a stepped shape 49. Components having the same reference numerals as those in the fifth embodiment have the same structure and description thereof is omitted.
[0037]
  Next, the operation and action will be described. Since the lower end portion 46 of the fin 30 has a stepped shape 49, when the combustion amount is large, the flame extends and the fin 30 can receive heat from the flame as a whole, and the combustion amount can be reduced. If it is small, the flame is short and the amount of secondary air is small, so that the amount of heat received from the flame at the fin 30 increases and the temperature of the fin 30 rises too much and the fin 30 can be avoided from melting. Even when it is changed, an optimal amount of heat can be received from the fins 30, so that the vaporization performance can be improved. Moreover, since the weight of the fin 30 can be reduced, the vaporizer 24 can be made compact and the initial preheating time can be shortened.
[0038]
  (Example 8)
  FIG. 11 is a cross-sectional view of an essential part of a carburetor of a combustion apparatus according to an eighth embodiment of the present invention as viewed from above. The present embodiment will be described with reference to FIGS.
[0039]
  The difference from the first embodiment is that the thickness of the base 50 on the back surface 29 side of the fin 30 provided on the back surface 29 of the vaporizer 24 so as to protrude on the burner 26 is thicker than the thickness of the tip 51 protruding on the burner 26 side. It is that. Components having the same reference numerals as those in the first or second embodiment have the same structure and description thereof is omitted.
[0040]
  Next, the operation and action will be described. When the fin 30 has a uniform thickness, the heat transfer amount per unit volume of the fin 30 increases from the tip 51 to the base 50, so that heat is generated at the base 50. Phenomenon occurs, and the heat receiving efficiency of the fins 30 as a whole deteriorates. However, since the thickness of the base 50 on the back surface 29 side of the fin 30 of the fin 30 is made thicker than the tip 51, the amount of heat transfer per unit volume of the fin 30 can be made uniform throughout the fin 30, and as a whole The heat receiving efficiency of the fins 30 is improved, the power supplied to the heater 25 can be suppressed, power saving can be achieved, and the fins 30 can be made smaller, so that the carburetor 24 can be made compact.
[0041]
  Example 9
  FIG. 12 is a cross-sectional view of a main part of the carburetor of the combustion apparatus according to the ninth embodiment of the present invention as viewed from above. The present embodiment will be described with reference to FIGS.
[0042]
  The difference from the first embodiment is that, of the fins 30 provided on the back surface 29 of the carburetor 24 so as to protrude onto the burner 26, the protrusion length of the fin 30 positioned at the central portion 52 of the carburetor 24 toward the burner 26. This is because the length is shorter than the fin 30 in the vicinity 53 of the end. In the present embodiment, an example will be described in which the length of the fin 30 is increased in a circular arc shape from the central portion 52 to the end vicinity 53. Components having the same reference numerals as those in the first or second embodiment have the same structure and description thereof is omitted.
[0043]
  Next, the operation and action will be described. The flame formed by the burner 26 is located at the central portion 52 from the end vicinity 53.InSince the flow is concentrated and the flame is standing, the amount of heat received is large at the central portion 52 of the vaporizer 24, and conversely, the amount of heat received tends to be small near the end 53 of the vaporizer 24. This also raises the temperature of the fins 30 at the central portion 52 and the material is likely to melt. Therefore, in the central portion 52, the abnormal temperature rise can be suppressed by shortening the fins 30, and the heat receiving amount can be increased and the vaporization performance can be improved by lengthening the fins 30 toward the end vicinity 53. As a whole, the amount of heat received for each fin 30 can be made uniform. Therefore, the vaporization performance in the vicinity 53 of the vaporization surface 31 of the vaporizer 24 can be improved, the heat reception efficiency of the vaporizer 24 as a whole can be improved, the power supplied to the heater 25 can be suppressed, and the power can be saved. At the same time, the vaporizer 24 can be made compact in total.
[0044]
  (Example 10)
  FIG. 13 is a cross-sectional view of a main part of the carburetor of the combustion apparatus according to the tenth embodiment of the present invention as viewed from above. The present embodiment will be described with reference to FIGS.
[0045]
  The difference from the first embodiment is that the fin 30 provided on the back surface 29 of the carburetor 24 so as to protrude on the burner 26 has a protruding length toward the burner 26 of the fin 30 located in the portion 54 where the heater 25 is not provided. Is longer than the length of the fin 30 located in the portion 55 where the heater 25 is in the vicinity. Components having the same reference numerals as those in the first or second embodiment have the same structure and description thereof is omitted.
[0046]
  Next, the operation and action will be described. In the portion 54 where the heater 25 is not provided, the heating of the vaporizing surface 31 depends on the fins 30 and the amount of heat received from the flame is required than in the portion 55 where the heater 25 is provided. Since the length in the direction of the burner 26 of the fin 30 located in the portion 54 where the heater 25 is not present is longer than the length of the fin 30 located in the portion 55 where the heater 25 is present, heat is received from the flame in the portion 54 where the heater 25 is not present. The vaporization performance can be improved, the heat receiving efficiency of the vaporizer 24 as a whole is improved, the power supplied to the heater 25 can be suppressed, and the power can be saved, and the vaporizer as a whole. 24 can be made compact.
[0047]
【The invention's effect】
  As described above, according to the combustion apparatus of the first aspect of the present invention, since the fin is provided between the flame port and the secondary air port, the flame formed at the flame port is directly applied to the fin. Because it is in contact, it can receive heat at high temperatures with fins, and by installing multiple fins within the distance of one pitch of the flame opening, it can earn heat receiving area, so it can receive more heat and vaporize In addition to the effect that the performance can be improved, the power supplied to the heater can be suppressed and the power can be saved. In addition, since the fins can be made smaller by the amount of heat received, there is an effect that the vaporizer can be made compact.
[0048]
  Also,Claim 2According to the combustion deviceIf the length of the fin protruding to the burner is the same at the upper and lower ends, the amount of heat received from the flame at the fin increases because the flame is short and the amount of secondary air is small when the combustion amount is small. The fin is melted due to excessively rising, but the protrusion length of the fin to the burner side is longer than the lower end of the fin. In addition to the effect that the flame is short and the amount of secondary air is small, the amount of heat received from the flame at the fin increases and the temperature of the fin rises too much and the fin melts. In addition to the effect that it can be avoided, there is an effect that the optimum amount of heat can be received from the fin even when the amount of combustion is changed. Further, since the weight of the fin can be reduced, there is an effect that the initial preheating time can be shortened.
  AlsoSince the lower end of the fin is cut stepwise, the flame is extended when the combustion amount is large, and the entire fin can receive heat from the flame, and when the combustion amount is small, the flame is short and 2 Since the amount of heat received from the flame at the fin increases because the amount of secondary air is small, it is possible to avoid that the fin temperature rises too much and the fin melts, and even when the combustion amount is changed Since the optimum amount of heat can be received from the fin, the vaporization performance can be improved. Further, since the weight of the fin can be reduced, there is an effect that the initial preheating time can be shortened.
[0049]
  Also,Claim 3According to the combustion apparatus, when the thickness is uniform, the heat transfer amount per unit volume of the fins increases from the tip to the base, so that the phenomenon of heat congestion at the base occurs and the total However, the heat transfer efficiency per unit volume of the fin can be made uniform throughout the fin since the heat receiving efficiency of the fin is reduced, but the thickness of the base on the back side of the fin vaporizer is made thicker than the tip. Since the heat receiving efficiency of the fins can be improved as a whole, the power supplied to the heater can be suppressed and the power can be saved, and the fins can be made smaller, so that the carburetor can be made compact. effective.
[0050]
  Also,Claim 4According to the combustion apparatus, the flame formed by the burnerInSince the flow is concentrated and the flame stands, there is a large amount of heat received at the center of the vaporizer, and conversely, the amount of heat received tends to be small near the end of the vaporizer. This also increases the temperature of the fins at the center, and the material tends to melt. Therefore, it is possible to suppress an abnormal temperature rise by shortening the fin in the central portion, and it is possible to increase the amount of heat received and improve the vaporization performance by lengthening the fin near the end. As an effect, the amount of heat received for each fin can be made uniform. Therefore, the vaporization at the end of the vaporization surface of the vaporizer can be improved, the heat reception efficiency of the vaporizer as a whole is improved, the power supplied to the heater can be suppressed, and power saving can be achieved, and the total As an effect, the vaporizer can be made compact.
[0051]
  Also,Claim 5According to the combustion apparatus, in the part where there is no heater, the heating of the vaporization surface depends on the fins, and the amount of heat received from the flame is required from the part where the heater is present, but the fin burner located in the part where there is no heater Since the length in the direction is longer than the length of the fin located in the part where the heater is located, the heat received from the flame in the fin located in the part where there is no heater can be increased, and the vaporization performance can be improved. In addition to the effect that it can be achieved, the heat receiving efficiency of the vaporizer as a whole is improved, and the power supplied to the heater can be suppressed, and the power can be saved. Moreover, there is an effect that the vaporizer can be made compact as a whole.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a main part configuration of a combustion apparatus according to a first embodiment of the present invention.
FIG. 2 is a cross-sectional perspective view of a carburetor of the combustion apparatus.
FIG. 3 is a cross-sectional view of the main part of the carburetor of the combustion apparatus as seen from the burner side.
[Fig.4] Connection diagram of the combustion device
FIG. 5 is a cross-sectional view of an essential part of a carburetor of a combustion apparatus according to a second embodiment of the present invention as viewed from the burner side.
FIG. 6 is a cross-sectional view of an essential part of a carburetor of a combustion apparatus according to a third embodiment of the present invention as viewed from above.
FIG. 7 is a cross-sectional view of a main part of a carburetor of a combustion apparatus according to a fourth embodiment of the present invention as viewed from the side.
FIG. 8 is a cross-sectional view of a main part of a carburetor of a combustion apparatus according to a fifth embodiment of the present invention as viewed from the side.
FIG. 9 is a cross-sectional view of a main part of a carburetor of a combustion apparatus according to a sixth embodiment of the present invention as viewed from the side.
FIG. 10 is a cross-sectional view of a main part of a carburetor of a combustion apparatus according to a seventh embodiment of the present invention as viewed from the side.
FIG. 11 is a cross-sectional view of an essential part of a carburetor of a combustion apparatus according to an eighth embodiment of the present invention as viewed from above.
FIG. 12 is a cross-sectional view of an essential part of a carburetor of a combustion apparatus according to a ninth embodiment of the present invention as viewed from above.
FIG. 13 is a cross-sectional view of an essential part of a carburetor of a combustion apparatus according to a tenth embodiment of the present invention as viewed from above.
FIG. 14 is a cross-sectional view of a main part of a conventional combustion apparatus
FIG. 15 is a cross-sectional perspective view of a carburetor of the combustion apparatus.
FIG. 16 is a cross-sectional view of the main part of the combustion apparatus as seen from the back side of the carburetor.
[Explanation of symbols]
  24 Vaporizer
  25 Heater
  26 Burner
  27 Mixing chamber
  29 Back
  30 fins
  38 Flame mouth
  39 Secondary air inlet
  42 Uneven shape
  43 Waveform
  44 groove
  45 Near heater
  46 Lower end
  47 Upper end
  48 cuts
  49 Staircase
  50 base
  51 Tip
  52 center
  53 Near edge
  54 Parts without heater
  55 Parts with heater

Claims (5)

A vaporizer configured to vaporize liquid fuel provided with a heater; a mixing chamber connected to the vaporizer; a plurality of flame openings for ejecting the mixture supplied through the mixing chamber; and the plurality of flame openings The burner is provided between the upper part of the mixing chamber and has a secondary air port for ejecting air, and protrudes upward with the flame port and the secondary air port of the burner. The fin provided in the back surface of the carburetor is a combustion apparatus provided between the flame opening and the secondary air opening. A vaporizer for vaporizing liquid fuel provided with a heater, a mixing chamber connected to the vaporizer, a flame port portion for jetting the air-fuel mixture supplied through the mixing chamber, and a secondary air port for jetting air And a burner provided at the upper part of the mixing chamber, and the protrusion length of the fin provided on the back side of the vaporizer so as to protrude above the burner from the lower end to the upper end. Combustion device that is longer and the lower end of the fin is cut like a staircase. A vaporizer for vaporizing liquid fuel provided with a heater, a mixing chamber connected to the vaporizer, a flame port portion for jetting the air-fuel mixture supplied through the mixing chamber, and a secondary air port for jetting air Part consists burner provided in said mixing chamber top includes a fin provided on a rear surface of the carburetor so as to protrude on the burner, the thickness of the base of the said carburetor back side to the burner side Combustion device thicker than the protruding tip. A vaporizer for vaporizing a liquid fuel having a heater, before Symbol vaporizer and connecting the mixing chamber, the secondary air ejected flame opening and the air for jetting air-fuel mixture supplied through the mixing chamber Of the fins provided on the back surface of the vaporizer so as to protrude above the burner, the burner of the fin located at the center of the vaporizer is provided with a mouth and provided at the upper part of the mixing chamber Combustion apparatus in which the protruding length to the side is shorter than the fin located near the end.   A vaporizer for vaporizing liquid fuel provided with a heater, a mixing chamber connected to the vaporizer, a flame port portion for jetting the air-fuel mixture supplied through the mixing chamber, and a secondary air port for jetting air And the burner of the fin located at a portion where the heater is not in the vicinity of the fin provided on the back surface of the vaporizer so as to protrude above the burner. The combustion apparatus which made the protrusion length to the side longer than the length of the said fin located in the part which has a heater in the vicinity.

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