CN2160315Y

CN2160315Y - Autocontrol-temp insulation cover for dining table

Info

Publication number: CN2160315Y
Application number: CN 93208930
Authority: CN
Inventors: 洪瑞标; 周明
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-14
Filing date: 1993-04-14
Publication date: 1994-04-06
Anticipated expiration: 2003-04-14

Abstract

The utility model relates to an automatic temperature control heat insulation cover for a dining table. A hard aluminum box is fixed on the top of the inner side of an upper cover of the automatic temperature control heat insulation cover for a dining table by an opening bolt. An insulation plate and a heating element PTC are orderly arranged at the bottom layer of the hard aluminum box. The upmost layer of the insulation plate is a heat insulation material. A conducting wire is connected with the positive pole and the negative pole of the heating element PTC by a switch. When the automatic temperature control heat insulation cover for a dining table is used, the temperature of dish can be continuously kept, and the color, the incense and the flavor of the dish are kept to be unchanged. The automatic temperature control heat insulation cover for a dining table is convenient in use. The automatic temperature control heat insulation cover for a dining table has the advantages of fast temperature rise, automatic temperature control, no open flame, safety, electricity saving, low cost, etc. Thus, the automatic temperature control heat insulation cover for a dining table is an ideal kitchen appliance for a family.

Description

Autocontrol-temp insulation cover for dining table

The utility model relates to a kind of from temperature control dining table stay-warm case, utilizes electric energy heating PTC heater element to be incubated.Belong to daily living article, ICL is: A47G 19/26.

In the now general family, especially on New Year's Day or other festivals receive and always will burn several courses more when the guest has a dinner, but in winter, particularly in the south of no heating installation, indoor temperature is lower, and the dish that takes the dish out of the pot earlier is easily cool, and twice-cooked stir-frying is heated again when having dinner, not only bother but also consume energy, but also can influence the taste of dish.China utility application 90215463.X discloses a kind of " dish electric heating thermal insulation cover ".It mainly is made up of plastic shell, aluminium skin heating layer, foam insulation, heating wire, radiator valve and power cord plug.This cover constitutes thermal insulating seat with desktop, and good dish keeps steaming hot for a long time can to make stir-fry, and color, smell and taste are constant.Plug the 220V AC power during use, on average used every day 3 hours, then about month power consumption 4.5 degree, the electricity charge are less than 1 yuan, have practical, security good, advantage with low cost.

What but the heating layer of this patent adopted is the aluminium skin, is unfavorable for the constant temperature protection, and the heat that the heating back produces is very fast to leave easily.Should constitute the protection chamber with desktop by cover in addition, easy like this desktop be caused damage.

The purpose of this utility model is just in order to solve weak point of the prior art, and proposed a kind of from temperature control dining table stay-warm case.It is heater element that this stay-warm case has adopted PTC, and has designed the liner plate that matches and use with last cover, has overcome the shortcoming that exists in the prior art.

The purpose of this utility model is achieved in that

From temperature control dining table stay-warm case, form by handle, switch, liner plate etc.The inside top of cover on stay-warm case, fix a duralumin box by split bolt, bottom at the aluminium box is an insulation board, be heater element PTC thereon, it on the heater element insulation board, the superiors are insulation material, and lead is connected on positive and negative the two poles of the earth of heater element by wire guide and switch.Liner plate and last cover are used, and make stay-warm case become as a whole.

The purpose of this utility model can also be further perfect by following steps:

On temperature control dining table stay-warm case, cover several breeder tubes are arranged.

The utility model compared with prior art has following advantage: structurally adopt and put into heater element PTC in the aluminium box, ptc material can be temperature automatically controlled.Upper and lower surface at PTC wraps up with insulation board, and the aluminium box can increase the thermal radiation area, and its outer surface also has reflex, makes to produce thermal cycle in the cover, improves the thermal efficiency.Cover is used with backing plate in the employing, and it is whole to make it form a sealing, and clean hygiene can be protected desktop again.

The utility model has 2 width of cloth accompanying drawings, and wherein Fig. 1 can be as the accompanying drawing of specification digest.

Fig. 1, be schematic diagram of the present utility model;

Fig. 2, be the utility model aluminium box inner structure schematic diagram.

Below in conjunction with accompanying drawing most preferred embodiment of the present utility model is described further.

Most preferred embodiment of the present utility model as shown in Figure 2, stay-warm case semicircular in shape (also can be other shapes), cover 1 top is a handle 5 on stay-warm case, inside top is fixed a duralumin box 10 by split bolt 2.The aluminium box and on the cover between be lined with seal washer.The heater element 6 of in the aluminium box, packing into, its heater element is PTC, and the upper and lower faces of PTC is with insulating barrier 4,7 parcels, and the superiors are heat-insulation layer 8.Duralumin box 10 has double action, and the one, be used to adorn heater element and other auxiliary material, the 2nd, the aluminium box can increase the width of cloth and penetrate area, and its outer surface also has reflex, makes to produce thermal cycle in the cover, obviously improves the thermal efficiency.Insulation material can make internal heat be difficult for scatter and disappear, and make PTC downwards the width of cloth penetrate heat.Outer cover mainly plays heat-blocking action, makes internal heat be difficult for outwards scattering and disappearing, and is used with liner plate 12, forms the integral body of a sealing, and clean hygiene can be protected desktop again.Lead is connected with switch 3 by in wire guide 9 introduced covers.The lead of being drawn by switch 3 is communicated with the positive and negative electrode of PTC.On last cover 1, passage 11 is arranged, the hot gas in the cover is discharged.

The utility model adopts novel heater element PTC as thermal source, and PTC is a kind of resistance of positive temperature coefficient.When temperature during less than its Curie point, (selecting Curie point for use is about 100 ℃), its resistance is very little; Initial power is very big, and intensification is exceedingly fast; Along with temperature raises; The very fast increase of its resistance; Power descends, and in the time of near temperature is elevated to Curie point, the resistance approximates infinity is cut off circuit.When heat outwards scatters and disappears, when temperature descends, connect circuit again, temperature is controlled near the Curie point automatically, reach effect from temperature control.

Adopt the PTC series and parallel, add simple control circuit, can also regulate the temperature spot of insulation arbitrarily.

Selecting Curie temperature for use is 100 ℃ PTC, and dining table stay-warm case internal temperature is controlled within 40 ℃～70 ℃ the scope, its error is no more than ± and 1 ℃.

The utility model can make dish continue insulation, and keeps the color of dish constant, easy to use. Owing to adopt the type of heat element, have quick heating, temp auto-controlled, the flames of anger, safety, economize on electricity, low cost and other advantages, be the desirable kitchen utensils of family.

Claims

1, a kind of from temperature control dining table stay-warm case, by handle, switch, compositions such as liner plate, it is characterized in that: the inside top of cover (1) on stay-warm case, fix a duralumin box (10) by split bolt (2), bottom at aluminium box (10) is an insulation board (4), be heater element PTC (6) thereon, heater element PTC (6) goes up and is insulation board (7), the superiors are insulation material (8), lead just is being connected heater element PTC (7) by wire guide (9) and switch (3), on negative the two poles of the earth, liner plate (12) is used with last cover (1), makes stay-warm case form an integral body.

2, according to claim 1 from temperature control dining table stay-warm case, it is characterized in that: said going up on the cover (1) has several breeder tubes (11)