CN2205167Y

CN2205167Y - Energy saving kettle

Info

Publication number: CN2205167Y
Application number: CN 94244516
Authority: CN
Inventors: 施厚斌
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-10
Filing date: 1994-11-10
Publication date: 1995-08-16
Anticipated expiration: 2004-11-10

Abstract

The utility model discloses an energy saving water boiling kettle. The utility model mainly solves the shortage that the existing columnar water boiling kettle with flat bottom has low heat efficiency. The kettle body is designed into a sphere. The sphere surface of the lower half part of the kettle body is provided with a plurality of heat absorbing rib pieces along the longitudinal separation to enlarge the heat exchange area. A hollow bowl-shaped radiation reflection cover covers the lower half part of the sphere kettle to improve the transmission efficiency of the heat radiation. The utility model saves the use quantity of the coal gas, shortens the coal gas service life, and is suitable for common families.

Description

Energy saving kettle

The utility model relates to a kind of energy-saving kettle.

The kettle teapot that uses in China huge numbers of families at present, the overwhelming majority all is flat cylinder or nearly cylindrical geometry.This flat heating container is from the field of thermal conduction study, and the thermal efficiency is quite low.Show from experimental measurements and theoretical calculating, 4Kg water is heated to 100 ℃ of coal gas that need burning 0.1357kg from 22 ℃, the gas-fired liberated heat of this amount is 851.47 kilocalories, and 4kg water only needs 312 kilocalories of heats by 22 ℃ to seething with excitement, and the thermal efficiency that is to say this heating container is 36.6%.The reason that causes above-mentioned situation is from convection transfer rate, and the convection transfer rate of flue gas and kettle bottom surface is about 43, and the water-in-kettle NATURAL CONVECTION COEFFICIENT OF HEAT is about 678, and both compare very far away; From the heat conduction situation, in order to strengthen the mechanical strength of kettle, its metal heat-conducting wall can not be done thinly excessively, certain thermal conduction resistance has so just been arranged, flue gas stream formed laminar boundary layer on wall in addition, its thickness has increased thermal resistance again, two thermal resistance overslaughs hot conduction; From radiation heat transfer, when adopting the injection type premix burner to heat this kind kettle, its radiation exchange heat flow density only is 3792.98w/m again ², and the convective exchange heat flow density is 49352.52w/m ², obvious this mode of heating radiation heat transfer is seldom.

The purpose of this utility model will provide a kind of energy-saving kettle exactly, with new spherical structure overcome old-fashioned flat cylindrical kettle the intrinsic low defective of the thermal efficiency.

Be the energy-saving kettle of realizing that this purpose the utility model is designed, the kettle that comprises the kettle body of being with Hu Zui and be connected in the kettle body and cover pot lid on kettle body top, difference is that the kettle body is designed to spherical, be furnished with some heat absorption fins in this spherical kettle body Lower Half along spherome surface longitudinal separation, kettle body and layout heat absorption fin thereon are placed in the bowl type hemispherical radiation reflector of a hollow, constitute complete energy-saving water jug thus.The effect of its bowl type bottom is to put steady kettle, and hollow is passing through for the hot-fluid that burns.

Advantage of the present utility model is: first adopts spherical kettle body, makes the flue gas fluid become the heat convection that streams spheroid, has improved the coefficient of heat transfer, has enlarged heating surface area; Spherical mechanical strength height in addition, the kettle wall thickness can both reduce thermal conduction resistance for below 1/2 of cylindricality kettle wall thickness, can save a large amount of metal materials again.Second at kettle body Lower Half layout heat absorption fin, has further strengthened heat exchange area, has improved the heat convection ability.The 3rd adopts hemispherical radiation reflector, except that having improved radiation heat transfer, also has an effect that makes auxiliary air obtain injection.Owing to adopted above several technical measures, improve the thermal efficiency widely in a word, saved considerable combustion gas, shortened heat time heating time.

The utility model is described in further detail below in conjunction with accompanying drawing:

Fig. 1 is a kind of general structure schematic diagram of energy-saving kettle.

Fig. 2 be among Fig. 1 the kettle body and on the layout schematic diagram of fin.

Fig. 3 be among Fig. 2 A to schematic diagram.

Among the figure kettle 1, pot lid 2, kettle body 3 is made spheroid, in the Lower Half of this spheroid, just the spherome surface with contacts fuel gas has longitudinally evenly welded 24-32 sheet heat absorption fin 4 at interval, the layout quantity of fin 4 thermal efficiency in this scope is higher.The arrangement pitch of fin is wide at the top and narrow at the bottom, and radially, the fin upper height is general and centre of sphere height is roughly the same, and heat exchange area is mainly worked to enlarge in subglobular kettle body bottom in bottom.Also design the hemispherical radiation reflector 5 of bowl type that a hollow is arranged simultaneously, above-mentioned kettle body 3 just is placed in this radiation reflector 5, is made by fin 4 to produce the gap between the two, is beneficial to the conduction and the radiation of thermal current.The rim of a bowl of this bowl type hemispherical radiation reflector 5 can be made into inwardly contraction-like, and thermal current is remained in the cover as far as possible, reduces and outwards distributes, and improves the thermal efficiency.Also the rim of a bowl height of this hemispherical radiation reflector 5 can be done to such an extent that be higher than the centre of sphere of kettle body 3, reach above-mentioned same purpose.Kettle body 3 select for use the common metal material all can, the available percussion welding of welding between fin 4 and the kettle body is met sb. at the airport and is once finished, bowl type hemispherical radiation reflector can form with the asbestos friction material compacting, promptly saves metal material, and cheap.

The heating experiment that below is spherical kettle of the utility model and old-fashioned cylindrical kettle is compared.Select same piped gas, same gas-cooker, heating 4kg water, two kinds of kettles are respectively done five experiments, and the physical quantity value of making even of surveying is recorded in following table:

The kettle kind	Environment temperature	Water temperature	Heat time heating time	Gas using quantity
					Spherical kettle	15.8℃	18.0℃	20＇0〃	0.239m ³
The cylindricality kettle	21.4℃	20.0℃	16＇8〃	0.305m ³

By experimental data as can be seen, spherical kettle is under all low situation of environment temperature and water temperature, and shorten heat time heating time, and gas using quantity greatly reduces, and saves gas using quantity to be:

(0.305-0.239)/0.305 ×100％＝21.6％

The spherical kettle teapot of obvious the utility model has science, applicability and economy.

Claims

1, a kind of energy-saving kettle, comprise that the kettle body (3) of being with Hu Zui and the kettle that is connected in kettle body (3) are (1) and cover pot lid (2) on kettle body (3) top, it is characterized in that kettle body (3) is designed to spherical, be furnished with some heat absorption fins (4) in this spherical kettle body Lower Half along spherome surface longitudinal separation, kettle body (3) and layout heat absorption fin (4) thereon are placed in the bowl type hemispherical radiation reflector (5) of a hollow.

2, energy-saving kettle according to claim 1 is characterized in that the rim of a bowl of said bowl type hemispherical radiation reflector (5) is inwardly contraction-like, to improve heat reflection efficient.

3, energy-saving kettle according to claim 1 is characterized in that the rim of a bowl horizontal plane of said bowl type hemispherical radiation reflector (5) is higher than the centre of sphere of spherical kettle body (3), to improve heat reflection efficient.

4,, it is characterized in that said heat absorption fin (4) layout quantity is 24～32 according to claim 1 or 2 or 3 described energy-saving kettles.