Combustion device

Abstract

To provide a combustion device capable of preventing the generation of vibration noise.SOLUTION: The combustion device comprises a placement table 2, a burner 10 vaporizing / burning fuel oil, a leveler tank 21 storing fuel oil, a lifting pump 30 lifting fuel oil from an external tank to the lever tank 21, an attachment member 41 erected vertically relative to the placement table 2, and a pump fixing plate 42 fixing the lifting pump 30. The attachment member 41 includes a bent section 41a extending in the vertical direction relative to the placement table 2, a first vertical face 41b disposed on one side of the bent section and a second vertical face 41c disposed on the other side thereof. The pump fixing plate 42 is provided on the first vertical face 41b or on the second vertical face 41c of the attachment member. The lifting pump 30 is fixed to the pump fixing plate 42 in such a way that the amplitude direction of a plunger 30a present in the lifting pump 30 is directed in the vertical direction.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a combustion device, and more particularly to a combustion device that pumps liquid fuel such as fuel oil from an external fuel tank into an internal level tank for combustion to perform hot water supply, heating, etc.

Background Art

[0002] Conventionally, in this type of combustion device, there is known one provided with a pumping pump that can pump fuel oil such as kerosene stored in an external fuel tank into a level tank that temporarily stores and adjusts the liquid level between the external fuel tank and the combustion device. For example, Patent Document 1 discloses a combustion device provided with a combustion unit that burns fuel oil inside a housing, an electromagnetic pump that supplies fuel oil to the combustion unit, a level tank that stores the fuel oil supplied to the combustion unit, and a pumping pump (12) that supplies fuel oil from an external tank into the level tank.

[0003] In the combustion device of Patent Document 1, the upper surface of the level tank is closed by a tank lid (13), and an electromagnetic pump (10) and an oil level sensor (11) are attached to this tank lid. Further, the tank lid has an extension portion (13a) extending to one end side from the upper surface of the level tank, and a pumping pump is fixed to this extension portion.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Incidentally, this combustion device, when the amount of fuel in the leveler tank decreases due to combustion, drives a pump to draw fuel from an external tank into the leveler tank. This pump is configured to discharge fuel from the external tank towards the leveler tank by vibrating a plunger, which is housed inside the cylinder in a sliding contact state, in the axial direction due to periodic changes in magnetic force. When this plunger vibrates, the pump and the extension of the tank lid vibrate, and the vibration is further transmitted to the leveler tank and the base, becoming one of the sources of unpleasant vibration noise.

[0006] This invention was made in view of the above background, and aims to provide a combustion device that can suppress vibration noise caused by the operation of a pumping pump. [Means for solving the problem]

[0007] The present invention has been made to achieve the above objective, and claim 1 comprises a base, a burner section for vaporizing and burning fuel oil, a leveler tank for storing the fuel oil, a pump for pumping the fuel oil from an external tank to the leveler tank, a fuel supply pipe for supplying the fuel oil pumped up by the pump to the leveler tank, an electromagnetic pump for supplying the fuel oil from the leveler tank to the burner section, a mounting member erected vertically with respect to the base, and a pump fixing plate for fixing the pump, wherein the mounting member has a bent portion extending vertically with respect to the base, a first vertical surface on one side of the bent portion, and a second vertical surface on the other side, the pump fixing plate is provided on the first or second vertical surface of the mounting member, and the pump is fixed to the pump fixing plate with the amplitude direction of the plunger inside the pump being vertical.

[0008] Claim 2 is characterized in that the mounting member is formed at the end of the burner mounting base that fixes the burner portion. [Effects of the Invention]

[0009] According to this invention, it is possible to provide a combustion device that can suppress the generation of vibration noise. [Brief explanation of the drawing]

[0010] [Figure 1] Perspective view of a combustion apparatus according to the first embodiment of the present invention [Figure 2] Schematic diagram of the combustion apparatus of the first embodiment of the present invention with some parts removed. [Figure 3] Perspective view showing the burner section and fuel supply section surrounding the combustion device of the first embodiment of the present invention. [Figure 4] A first perspective view showing the burner mounting base and the area around the fuel supply unit of a combustion device according to the first embodiment of the present invention. [Figure 5] A second perspective view showing the burner mounting base and the area around the fuel supply unit of the combustion device according to the first embodiment of the present invention. [Figure 6] Enlarged view of the main part of the combustion device according to the first embodiment of the present invention [Figure 7] Cross-sectional view of a pumping pump according to the first embodiment of the present invention [Modes for carrying out the invention]

[0011] A first embodiment of the present invention will be described with reference to Figures 1 to 6.

[0012] Reference numeral 1 denotes a combustion device of the first embodiment, which is an oil heating device and comprises a horizontally mounted base 2, a housing 3, an operating unit 4, a burner unit 10, a radiator 15 communicating with the burner unit 10, a combustion fan 16, and a fuel supply unit 20 that supplies fuel oil to the burner unit 10.

[0013] The burner unit 10 comprises a vaporizer made of die-cast aluminum (not shown), a burner 10a connected to the vaporizer for burning the vaporized fuel oil, and a bottomed rectangular tubular burner case 10b that houses the vaporizer and the burner 10a. The burner 10a receives combustion air from the combustion fan 16 and fuel oil from the fuel supply unit 20, and burns the fuel oil to generate combustion gas. The generated combustion gas passes through the combustion chamber 11 located above the burner 10a, passes through the radiator 15 communicating with the burner section 10, and is exhausted outside the appliance through an exhaust pipe (not shown).

[0014] The radiator 15 is heated by the combustion gas generated in the burner section 10, emits radiant heat into the room, and generates warm air by exchanging heat with the indoor air blown from the blower fan 17.

[0015] 40 is a burner mounting base that has a U-shaped cross-section in plan view and is mounted and fixed on the mounting table 2. 19 is a heat shield plate installed and fixed so as to span the upper part of the burner mounting base 40. The burner mounting base 40 has bent portions 40a at its upper and lower ends and left and right ends to enhance the rigidity of the burner mounting base 40 itself, and the bent portions 40a are fixed to the mounting table 2 and the mounting members 41 and the heat shield plate 19 described later with screws or the like. Also, since the heat shield plate 19 is spanned and fixed to the burner mounting base 40, the rigidity of the burner mounting base 40 is enhanced.

[0016] The burner case 10b has a flanging portion (not shown) that extends outward around the upper end of the burner case 10b, and as shown in FIG. 3, the flanging portion is locked and attached to the center of the heat shield plate 19. [[ID=​​​​​​​The fuel supply unit 20 includes a leveling tank 21 for storing the fuel oil supplied to the burner unit 10, a tank support member 25 for fixing the leveling tank 21 on the mounting base 2, an electromagnetic pump 22 for supplying the fuel oil in the leveling tank 21 to the burner unit 10, an oil level sensor 23 for detecting the height of the oil level in the leveling tank 21, a tank lid 24 closing the top of the leveling tank 21 and equipped with the electromagnetic pump 22 and the oil level sensor 23, a pumping-up pump 30 for supplying fuel oil from an outdoor external tank (not shown) to the leveling tank 21 up to a predetermined height when the oil level in the leveling tank 21 drops below the predetermined height, a pumping-up pipe 31 which is the path of the fuel oil from the external tank to the pumping-up pump 30, and a fuel oil delivery pipe 32 which is the path of the fuel oil from the pumping-up pump 30 to the leveling tank 21.

[0019] The upper surface of the leveling tank 21 is closed by the tank lid 24, and the electromagnetic pump 22 and the oil level sensor 23 are attached on the tank lid 24. The electromagnetic pump 22 has a suction end (not shown) provided in the leveling tank 21, and supplies, via a connecting pipe not shown, the amount of fuel oil in the leveling tank 21 corresponding to the combustion amount to the burner unit 10. The oil level sensor 23 has a float (not shown) that moves up and down according to the up and down movement of the oil level in the leveling tank 21, and detects the lower limit oil level and the upper limit oil level. Note that this oil level sensor 23 may be an optical type.

[0020] The leveling tank 21 is placed and fixed on the mounting base 2 by the tank support member 25. The tank support member 25 consists of a base portion 25a and a pair of rising portions 25b. The base portion 25a is screwed to the mounting base 2 via a rubber bush 15c. At the upper end of the rising portion 25b, the upper end flange (not shown) of the leveling tank 21 and the tank lid 24 are clamped together with screws, and the bottom of the leveling tank 21 is fixed in a state separated from the base portion 25a.

[0021] In the present invention, the pumping-up pump 30 is attached not to the tank lid 24 of the leveling tank 21 but to the pump fixing plate 42. This will be specifically described below.

[0022] In other words, as shown in Figures 4 and 5, a mounting member 41 and a pump fixing plate 42 for fixing the pumping pump 30 are attached to the right end of the burner mounting base 40. The mounting member 41 has a bent portion 41a that is erected vertically with respect to the horizontally placed base 2, and comprises a first vertical surface 41b on one side (right side in Figure 4) and a second vertical surface 41c on the other side (rear side in Figure 4) such that the horizontal cross-section is L-shaped with respect to the bent portion 41a. The mounting member 41 has a notch 41d in the middle of its height for fixing the pump fixing plate 42, and a screw hole 41e for fixing it to the burner mounting base 40.

[0023] As shown in Figure 6, the pump fixing plate 42 includes a pump fixing surface 42a which is a horizontal surface for fixing the pumping pump 30, a locking surface 42b which faces the first vertical surface 41b of the mounting member 41, and a locking portion 42c which is cut out from the locking surface 42b and locks with the notch 41d. The pump fixing plate 42 is fixed to the first vertical surface 41b of the mounting member 41 by a locking portion 42c and a fastening member 42d such as a screw.

[0024] Furthermore, the pump fixing plate 42 includes a first support surface 42e which is a vertical surface perpendicular to the locking surface 42b at the first corner 42f, a second support surface 42g which is a vertical surface perpendicular to the first support surface 42e at the second corner 42h, and a third corner 42k which is perpendicular to the second support surface 42g and the pump fixing surface 42a. The pump fixing surface 42a forms a rectangle with a long side and a short side, and is perpendicular to the second support surface 42g at the long side of the pump fixing surface 42a and the third corner 42k.

[0025] Triangular ribs 42p are provided at the second corner 42h and the third corner 42k to ensure strength.

[0026] The pumping pump 30 is fixed to the pump fixing surface 42a of the pump fixing plate 42. A pumping pipe 31, which communicates with an external tank, is connected to the inlet side of the lower part of the pumping pump 30, and an oil supply pipe 32, which communicates with a leveling tank 21, is connected to the outlet side of the upper part. The oil supply pipe 32 is open into the leveler tank 21 through an inlet hole (not shown) opened in the tank lid 24.

[0027] As shown in Figure 7, the pumping pump 30 includes a cylindrical cylinder 30b inside the pumping pump 30, a plunger 30a supported to reciprocate within the cylinder 30b, a plunger spring 30c that biases the plunger 30a in the discharge direction, and an electromagnetic coil 30d provided on the outer circumference of the cylinder 30b.

[0028] When the pumping pump 30 receives a drive command, the electromagnetic coil 30d is intermittently energized at a predetermined on-time, predetermined drive frequency, and predetermined power supply voltage. When energized, the magnetic flux pulls the plunger 30a downward against the biasing force of the plunger spring 30c. When the magnetic flux disappears, the plunger 30a rises upward in the diagram due to the biasing force of the plunger spring 30c, repeating this vertical vibration, thereby supplying fuel oil from the external tank to the leveler tank 21.

[0029] In this invention, the pumping pump 30 is fixed to the pump fixing surface 42a of the pump fixing plate 42 with the amplitude direction of the plunger 30a inside the pumping pump 30 in the vertical direction, and both the extension direction of the bent portion 41a of the mounting member 41 and the amplitude direction of the plunger 30a are in the vertical direction.

[0030] Next, the operation of the first embodiment will be described.

[0031] When the heating operation consumes fuel in the leveler tank 21, the oil level sensor 23 detects that the fuel level has dropped to the lower limit, and the pumping pump 30 is started to supply fuel from the external tank to the leveler tank 21. When the oil level sensor 23 detects that the fuel level has risen to the upper limit, the pumping pump 30 is stopped, and a certain amount of fuel is maintained in the leveler tank 21. The pumping pump 30 may be stopped after a predetermined time has elapsed since the pumping pump 30 started.

[0032] Once the pumping pump 30 is started, the plunger 30a inside the pumping pump 30 oscillates vertically at a predetermined frequency (for example, 20 Hz). This amplitude causes the pumping pump 30 itself to vibrate up and down, transmitting the vibration to the pump fixing surface 42a of the pump fixing plate 42 to which the pumping pump 30 is fixed, and also to the mounting member 41 to which the pump fixing plate 42 is fixed.

[0033] However, since the mounting member 41 is equipped with a bent portion 41a that extends vertically with respect to the horizontally placed base 2, the mounting member 41 can ensure high rigidity against vertical vibrations, and since the pump fixing plate 42 is fixed to the first vertical surface 41b adjacent to this bent portion 41a, the generation of vibration noise due to the amplitude of the plunger 30a of the pumping pump 30 can be suppressed.

[0034] Furthermore, since the third corner 42k on the long side of the pump fixing surface 42a is perpendicular to the second support surface 42g, the axis of the pumping pump 30 and the screws for fixing the pumping pump 30 to the pump fixing surface 42a can be arranged in the long side direction, and the center of gravity of the pumping pump 30 can be placed relatively close to the second support surface 42g, thereby increasing the rigidity of the pumping pump 30 against vibration.

[0035] Although the pump fixing plate 42 was described as being fixed to the first vertical surface 41b of the mounting member 41, it may also be fixed to the second vertical surface 41c.

[0036] Although the mounting member 41 has been described as being fixed as a separate part to the end of the burner mounting base 40, it is also possible to form a bent portion on the right end of the burner mounting base 40 and designate this bent portion as the bent part 41a, thereby integrating the burner mounting base 40 and the mounting member 41 into a single unit.

[0037] Although the pump fixing plate 42 has been described as being fixed as a separate part from the mounting member 41, it is also possible to integrate the mounting member 41 and the pump fixing plate 42 by bending the first vertical surface 41b of the mounting member 41 at its upper end to form a horizontal surface that becomes the pump fixing surface 42a.

[0038] Although this embodiment describes an oil heating system 1 equipped with a fuel supply unit 20, it is not limited to an oil heating system; an oil water heater or an oil hot water boiler may also be used.

[0039] The other configurations used in this embodiment are presented as examples only and are not intended to limit the scope of the invention. It can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included in the scope and spirit of the invention, as well as in the claims of the invention and its equivalents. [Explanation of symbols]

[0040] 1: Oil heating system (combustion device) 2: Stand 10: Burner section 21: Level Tank 22: Electromagnetic pump 30: Pumping pump 30a: Plunger 32: Oil supply pipe 40: Burner mounting base 41: Mounting parts 41a: Bent part 41b: 1st vertical plane 41c: 2nd vertical plane 42: Pump mounting plate

Claims

1. Stand and The burner section vaporizes and burns the fuel oil, A leveler tank for storing the aforementioned fuel oil, A pump for drawing the fuel oil from the external tank to the leveler tank, A supply pipe for supplying the fuel oil pumped up by the aforementioned pumping pump to the leveler tank, An electromagnetic pump that supplies the fuel oil from the leveler tank to the burner section, A mounting member erected vertically with respect to the aforementioned base, A pump fixing plate for fixing the aforementioned pumping pump, Equipped with, The aforementioned mounting member is A bent portion extending perpendicularly to the base, The first vertical surface on one side of the bent portion, The other side's second vertical plane, It has, The aforementioned pump fixing plate is The mounting member is provided on the first vertical surface or the second vertical surface, The aforementioned pumping pump is The plunger inside the pump is fixed to the pump fixing plate with its amplitude direction set to the vertical direction. A combustion device characterized by the following features.

2. The aforementioned mounting member is Formed at the end of the burner mounting base that fixes the burner section The combustion apparatus as described in claim 1.

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