CN2135112Y

CN2135112Y - High-efficient gas range

Info

Publication number: CN2135112Y
Application number: CN 91204472
Authority: CN
Inventors: 张财年
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-03-20
Filing date: 1991-03-20
Publication date: 1993-06-02
Anticipated expiration: 2001-03-20

Abstract

The utility model belongs to a cooker, in particular to a high-efficient gas range, whose purpose is to improve the thermal efficiency of the cooker. A gradually shrinking suction tube is connected with a cylindrical hybrid tube and then is connected with an ejector composed of a gradually expending diffusion tube, and is tangentially connected with a constant velocity centrifugal-chamber cavity; the cavity is axially communicated with the chamber at the head provided with a fire disk through an annular passage. The fire disk is made of a fireproofing material with low thermal conductivity coefficient and is in a funnel shape; the surface of the wall is provided with long-short interphase narrow slits which are radiation arranged, and the width of the slits is not bigger than the critical diameter of the fuel gas. An injection nozzle is coaxial with the ejector. The utility model is suitable for all the gaseous fuels including the liquid fuel vaporized gas and the natural gas.

Description

High-efficient gas range

The utility model relates to a kind of kitchen range, particularly high-efficiency gas stove.

Stipulate in " house coal gas kitchen " standard: when using under rated heat input, rated heat load, the thermal efficiency should be greater than 55%.In fact, the thermal efficiency of commercially available kitchen range reaches the few of standard.Once 11 kinds of kitchen ranges to collecting, its thermal efficiency of criterion referenced test.The results are shown in Table 1, as seen have only a kind of thermal efficiency of kitchen range to reach standard.What do not reach is so low again.The thermal efficiency is low, wastes energy, and the user pays greatly, and cooking is slow, contaminated environment.

Existing gas range, methane cooker, the gasification burner that uses gaseous fuel ... Deng, all be that the fuel gas with certain pressure ejects from nozzle, the formed low pressure of high velocity air, near the nozzle free air is attracted to inject in the injector of burner, gaseous mixture enters the burner head chamber subsequently, again from being installed in the exhaust passage discharge on the fire dish on the head chamber mouth and burning.

Under minimum excess air coefficient, mixed uniformly combustion mixture, energy completing combustion, fuel chemical energy changes heat energy entirely into, obtains high temperature, if reduce heat leakage, makes full use of heat, can obtain the high thermal efficiency.Once existing kitchen range was adjusted, improved its primary air ratio α ₁, still, the kitchen range α that has ₁Transfer greatly slightly, tempering promptly takes place; The kitchen range α that has ₁Transfer not get on, the thermal efficiency does not improve eventually.

The purpose of this utility model is: a kind of gas-cooker that has improved is provided, and it can provide and at primary air ratio α ₁Near or equal under the minimum excess air coefficient α, smooth combustion obtains the higher thermal efficiency.

The purpose of this utility model is achieved in that under identical thermic load, increases nearly 2 times than prior art injector aisle spare; Set up spiral case ring cavity and circular passage between injector and head chamber, gaseous mixture tangentially enters the spiral case ring cavity from injector, axially flows out to enter head chamber through the circular passage; Adopt the low refractory material of thermal conductivity factor to make the fire dish; The fire disk shape is decided according to instructions for use, for general household kitchen range, recommendation conical funnel shape, have radiation arrangement, the alternate narrow slit of length on the conical shell, as fire dish exhaust passage; Stitch the wide cut off diameter that is not more than used fuel gas.

The utility model does not increase device, only is the transformation to conventional art.The injector aisle spare increases, and is convenient to the more air of injection; The spiral case ring cavity, the air-flow distance that extended and the time and the chance that flow and mix, and be turbulent flow, for gaseous mixture evenly mixes the condition created; The gaseous mixture that fire coils can uniform distribution be passed through in the circular passage, and burning for the stable and uniform of fire dish creates conditions; Fire dish exhaust passage seam is wide to be not more than gases used cut off diameter, can tempering; Burnt rubescently when the refractory material that thermal conductivity factor is low, fiery dish work, gaseous mixture one is discharged and is promptly lighted, and can not take place from flame; Except that high-temp combustion waste gas to pad conducts heat, burns red high temperature fire dish, with the heat radiation form to being heated the cooker heat transfer; The conical funnel shape is concentrated radiations heat energy, also helps burning, especially for the R-joining of opening along air-flow direction of rotation in the spiral case ring cavity, resistance is few, discharges the air-flow rotation, is beneficial to the secondary air circuit and the secondary air of secondary air center trace and mixing of gaseous mixture.The thermal efficiency test result of the utility model research model sees Table 2.The result of table 2 and table 1, method of testing is identical, and both relatively see Table 3.

Table 1: commercially available 11 kinds of kitchen range thermal efficiency test results

Table 2: the utility model research model kitchen range thermal efficiency test result

Table 3: research model kitchen range and commercially available kitchen range thermal efficiency test result are relatively

Along with primary air ratio α ₁Raising, the combustion noise of generation is improving, the thermal efficiency also improving, can be turned down α ₁Work under the noise not taking place, but the thermal efficiency at this moment is low slightly.

The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the front view according to the simple eye high-efficiency gas stove that the utility model proposes; Fig. 2 is its vertical view; Fig. 3 is the front view of fire dish 11; Fig. 4 is its vertical view; Fig. 5 is a burner head B--B profile; Fig. 6 is its A--A profile.

This single-hole range is placed on the kitchen range frame 2 by the Fig. 1 that keeps out the wind, and burner 5 has three support arms 16, is formed by connecting with kitchen range frame 2 by screw rod 4, nut 3.Burner 5, by switch nozzle 15, air regulating board 14, nozzle mount pad 13, fire dish 11 installs on the burner shell and constitutes.Burner shell is by injector 12, spiral case ring cavity 8, and circular passage 9, head chamber 10, secondary air central passage 7 constitutes.Fire coils 11 by outer shroud 7, interior ring 20, and short seam 18, slit 19 constitutes.

Combustible gas is from 15 ejections of switch nozzle, the injection air enters injector 12, tangentially enter spiral case ring cavity 8 again, axially flow out through the circular passage 9 and enter head chamber 10, mixed airflow mixes while advancing on the way, and behind the circular passage, parameters such as its component, pressure, speed all become even, when the fire dish is discharged, run into the flourishing dish of high temperature, immediately fire burns.

For the control noise, have to control the primary air inlet, not enough part is by secondary air center trace 7 and secondary air circuit 6 inside and outside replenishing.

Be used for the conical funnel shape fire dish 11 of general household kitchen range, cone angle can be selected for use between 60 °～150 °.Need to be used to the fire dish of the homodisperse baking kitchen range of heat, can to select plane fire dish 24 or convex fire dish 23 respective design head chamber shapes for use.

Exhaust passage on the fire dish can be a narrow slit, can be numerous apertures, can be that narrow slit mixes with aperture, stitches the cut off diameter that wide or aperture all is not more than used combustible gas.

Narrow slit on the fire dish, the discharge directions of aperture can be vertical cards, and technology is simple, can be the direction of oblique ┄ along swirling eddy in the spiral case ring cavity, better performances.

Utilize the utility model, can design the product of different sizes such as single-hole range, eyes kitchen range, multi-hole kitchen range, baking kitchen range, baking oven, baker, different class as required.

Fig. 7 is the vertical view of eyes kitchen range.The 21st, eyes kitchen range frame, the 22nd, turn-knob.Fig. 8 is convex fire dish 23 front views, and Fig. 9 is plane fire dish 24 front views, and Figure 10 is the vertical view of convex fire dish 23 and plane fire dish 24.This two embodiment, the exhaust passage is a narrow slit 25, aperture 26, mixed structure.

The drawing of spiral case ring cavity: the interior exterior feature of spiral case ring cavity 8 equates with the interior ring of circular passage 9, circle equates with the outer shroud of circular passage 9 in the spiral case, spiral case cylindrical and injector tangential admission passage outer rim are joined, sixth with the difference of spiral case inside and outside circle radius is a radius, in make auxiliary circle in the heart, should justify six five equilibriums, and connect the adjacent branch string of a musical instrument and conrotatory flow path direction and prolong this string of a musical instrument.Wherein string of a musical instrument should with the injector axis normal, the extension that is intercepted by cylindrical with this string is a radius, branch with prolongation string side is the center, the conrotatory flow path direction is drawn arc to next bar chord extending line and is ended, be the center of circle with adjacent branch again, the chord extending section that intercepts with arc is a radius, and the conrotatory flow path direction is drawn arc, by that analogy, six sections arcs promptly are linked to be spiral case gabarit ┈ constant speed spiral case.

The utility model, suitable gas fuel.Such as: artificial coal gas, natural gas, liquefied petroleum gas, biogas, acetylene ... and liquid fuel (gasoline, kerosene, diesel oil, methyl alcohol, ethanol, liquefied petroleum gas guiding principle bottle raffinate, synthetic liquid fuel ...) through the steam of vaporizer vaporization gained.

The commercially available 11 kinds of gas range thermal efficiency test results of table 1

The combustion gas kind	The kitchen range numbering	Testing time	Evenly heat efficient %	The evenly heat efficient % of same gas	Remarks
						Artificial coal gas	One or two	7 7	50.21 56.5	53.36
Liquefied petroleum gas	2345678	7 5 3 1 2 1 1	45.3 36.7 34.3 36.7 36.7 28.15 34.56	36.03
						Biogas	91	2 2 1	42.97 44.25 35.09	40.77

Table 2 the utility model grinds model kitchen range thermal efficiency test result

The combustion gas kind	The kitchen range numbering	Testing time	Evenly heat efficient %	The evenly heat efficient % of same gas	Remarks
						Artificial coal gas	10 11 12	2 2 3	69.88 63.5 67.98	67.12
Liquefied petroleum gas	11 12	3 6	59.12 58.36	58.74	-1-
						Biogas	12	1	49.69	49.69

Table 3 research model kitchen range with sell gas range thermal efficiency test result

The combustion gas kind	The evenly heat efficient X% of research model kitchen range	The evenly heat efficient %Y of commercially available gas range	X-Y %	X＼Y	The thermal efficiency Z% of commercially available efficient kitchen range	X-Z %	X＼Z
								Artificial coal gas	67.12	53.36	13.76	1.258	56.5	10.62	1.188
Liquefied petroleum gas	58.74	36.06	22.68	1.629	45.3	13.44	1.297
								Biogas	49.69	40.77	8.92	1.219	44.25	5.44	1.123

Claims

1, high-efficiency gas stove, by kitchen range frame 2,21, burner 5 is formed, and by the gas-flow that switch nozzle 15 ejects, carries air and enters injector 12, and burning is discharged in the exhaust passage of gaseous mixture on fire dish 11, and it is characterized in that: injector 12 tangentially connects spiral case ring cavity 8; With refractory material make low thermal conductivity fire dish; The fire dish is divided into the fiery dish 11 of recessed taper that firepower is concentrated for the dish of centre bore is arranged, firepower uniform in-plane fire dish 24, and the convex fire that firepower is dispersed coils 23, transforms the energy-conservation fire dish 32 of renewal of old kitchen range; Exhaust passage on the fire dish is narrow slit 18,19,25, aperture 26, and wide, the few Kong Zhijing of narrow slit all is not more than the cut off diameter of fuel gas; The exhaust passage configuration waits the slit homogeneous radiation to arrange, and length is stitched alternate homogeneous radiation and arranged, and the few hole of narrow slit mixed structure, interior external tooth narrow slit structure; The discharge directions of narrow slit aperture, vertical fiery card, or along spiral case ring cavity air-flow direction of rotation and the inclination of fiery card; No matter simple eye, eyes or multi-hole kitchen range link nozzle and injector by the nozzle mount pad and to be one, and realize that jet-stream wind is coaxial with injector.

2, high-efficiency gas stove according to claim 1, it is characterized in that: spiral case ring cavity 8, exterior feature equates with circular passage 9 inwalls in it, garden equates with circular passage 9 outer walls in it, its gabarit is the constant speed spiral case, and the band of column chamber, garden of available tangential admission exempts to take by force for the spiral case ring cavity.