CN2385428Y

CN2385428Y - Heat protector

Info

Publication number: CN2385428Y
Application number: CN 99236606
Authority: CN
Inventors: 何志超; 张鸿辉
Original assignee: SHENGPING HEAT PROTECTOR INDUSTRIAL Co ZHONGSHAN CITY
Current assignee: SHENGPING HEAT PROTECTOR INDUSTRIAL Co ZHONGSHAN CITY
Priority date: 1999-07-15
Filing date: 1999-07-15
Publication date: 2000-06-28
Anticipated expiration: 2009-07-15

Abstract

The utility model relates to a heat protector, which is composed of two leading out lines 1, 15 and a sealing sleeve 3. The utility model is characterized in that the inner part of a hollow cavity of the sealing sleeve 3 is provided with the tail end of a [-shaped spring plate 4 and the tail end of a big wire connecting plate 5 which are stacked with temperature sensing solder to form a temperature sensing block 6. An included angle alpha which is smaller than 90 DEG is arranged between the [-shaped spring plate 4 and the big wire connecting plate 5. The other end of the [-shaped spring plate 4 is connected with a fine wire connecting plate 7 by rivets 8. The tail end of the sealing sleeve 3 is sealed by a cylinder plunger 9. The fine wire connecting plate 7 and the leading out line 1 are connected. The big wire connecting plate 5 and the leading out line 15 are connected. The utility model has sensitive response and reliable operation. The utility model is a necessary safe component of an electric water heater.

Description

A kind of thermal protector

The utility model is a kind of low-melting alloy mechanical type thermal protector, and it is exclusively used in the electric heater water tank, is the indispensable safety member of protection electric heater, belongs to electrical accessorie.

The electric heater that generally uses is at home obtained hot water by the electrothermal tube heating at present.The water temperature of electric heater is controlled by adjustable thermostat.Except the electric heater that uses a thermostat, the product of some company has also increased a thermostat and has done overtemperature protection, to improve its security performance.But thermostat has its weakness: promptly thermostat can automatically reset after ambient temperature reduces, and after primary fault took place, great danger can take place automatic processing circuit if there is not the professional to fix a breakdown hidden danger.For example: anhydrous and switch in the electric heater water tank, be easy to cause the electrothermal tube explosion and cause electric shock accidents.And for example water level is low excessively, the interior a small amount of water of electric heater water tank is heated rapidly becomes water vapour, and water vapour is overflowed from pipeline, can cause shower personnel's scald accident, further also can set off an explosion.Therefore, for the producing and selling and the use of electric heater, national departments concerned has been made strict regulation, and electric heater must be installed a kind of overtemperature prote device that has only artificial method just can resume work.

The purpose of this utility model provides a kind of thermal protector; it can overcome all weakness of thermostat; and the fault that is in use taken place, obtain a kind of anti-dry protector that can not reset after electric heater has an accident, guarantee being perfectly safe when electric heater uses.

The utility model is design like this: at the disadvantage that thermostat still can reset after accident takes place, conceive a kind of anti-dry protector that can not reset.Roll shape and heat treated metal clips with process, make with a big lug plate and its two ends are welded by the temperature-sensitive scolder, and make shell fragment and form angle a greatly between the lug plate less than 90 degree, the other end of shell fragment links to each other with a thin lug plate by rivet, then they are enclosed in the tubular housing, housing adopts 95% Al ₂O ₃Material can be high temperature resistant, and good insulation preformance.Thin lug plate links to each other with extraneous lead-out wire with big lug plate, can form circuit.Lead-out wire adopts the braiding silicone rubber wire, can be high temperature resistant, and rub resistance also adopts three-layer insulated material protection, has guaranteed the insulation property of product.Its operation principle is such: the thermal protector of this low-melting alloy mechanical structure; be connected in the heating copper tube of electric heater; when electric heater generation dry combustion method; when ambient temperature reaches protector predetermined actions temperature; be welded on temperature-sensitive scolder (a kind of low-melting alloy) fusion rapidly between shell fragment and the big lug plate; through rolling shape and heat treated metal clips by the end of the rapid bullet of its mechanical elasticity from big lug plate; and circuit is disconnected, change conduction state (cutting off the electricity supply) thereby reach.After ambient temperature reduced, shell fragment can not automatically reset yet.Like this, make electric heater obtain absolute fail safe, as not changing protector, heater circuit can not opened forever.

The utility model has the advantages that significantly: it adopts the low-melting alloy mechanical structure, and it is reasonable in design, and structure is ingenious, and practical operation is reliable.When ambient temperature reached its predetermined actions temperature, it was quick on the draw, and was swift in motion, and can cut off the electricity supply in a very short time, prevented the generation of electric shock accidents, had guaranteed the safe in utilization of electric heater.

Further set forth structure of the present utility model according to accompanying drawing below.

Accompanying drawing 1 is a structure diagram of the present utility model.

Accompanying drawing 2 is the state diagram of installing and using of the present utility model.

We can learn from accompanying drawing: a kind of thermal protector; form by two lead-out wires 1,15 and tubular sealing shroud 3; its design feature is to have the end of " Qian " shape spring leaf 4 and the end and the temperature-sensitive scolder of big lug plate 5 to build up a cuboid temperature-sensitive piece 6 in the cavity of cylinder bodily form sealing shroud 3; between " Qian " shape spring leaf 4 and the big lug plate 5 an angle a less than 90 degree is arranged; the other end of " Qian " shape shell fragment 4 is connected by rivet 8 with thin lug plate 7, with cylinder plug 9 end of sealing shroud 3 is sealed.Its second design feature is that thin lug plate 7 is connected with lead-out wire 1 by wiring card 10, heat-shrinkable tube 18 and thin sleeve pipe 11 entangle wiring card 10, big lug plate 5 be connected with lead-out wire 15 by wiring card 12, and entangle with heat-shrinkable tube 19 and thin sleeve pipe 13, again with big sleeve pipe 14 with thin sleeve pipe 11 and carefully sleeve pipe 13 entangle in pairs.Its 3rd design feature is that the end at lead-out wire 1,15 is connected with binding post 16 and sheath 17 respectively.

The utility model is to use like this: as shown in Figure 2, one group of hot heater, the both sides is an electric heating tube 20, has inserted heating tube in it.At the sealing thermal protector 22 of packing in the copper pipe 21; the cylinder sealing shroud 3 of thermal protector is tucked into sealing copper pipe 21 tops always, two lead-out wires is connected in the circuit goes then, two links 24 connect power supply; sealing copper pipe 23 can be placed the thermostat probe, can detect the temperature of water at any time.When under normal operating condition, thermal protector does not change, in case when electric heater generation dry combustion method, the temperature of heat-generating pipe can be transmitted to rapidly on the copper pipe, makes the rapid temperature-sensitive action of protector, cuts off the electricity supply, and has guaranteed the safe in utilization of water heater.Therefore the utility model---a kind of thermal protector is the indispensable safe electrical appliance accessory of electric heater, and its social benefit is great.

Claims

1, a kind of thermal protector; form by two lead-out wires (1), (15) and tubular sealing shroud (3); it is characterized in that in the cavity of cylinder bodily form sealing shroud (3), having the end of " Qian " shape spring leaf (4) and the end and the temperature-sensitive scolder of big lug plate (5) to build up a cuboid temperature-sensitive piece (6); between " Qian " shape spring leaf (4) and the big lug plate (5) an angle a less than 90 degree is arranged; the other end of " Qian " shape shell fragment (4) is connected by rivet (8) with thin lug plate (7), with cylinder plug (9) end of sealing shroud (3) is sealed.

2, a kind of thermal protector according to claim 1; it is characterized in that thin lug plate (7) is connected with lead-out wire (1) by wiring card (10); and wiring card (10) is entangled with heat-shrinkable tube (18) and thin sleeve pipe (11); big lug plate (5) is connected with lead-out wire (15) by wiring card (12); and entangle with heat-shrinkable tube (19) and thin sleeve pipe (13), use again big sleeve pipe (14) with thin sleeve pipe (11) and carefully sleeve pipe (13) entangle in pairs.

3, a kind of thermal protector according to claim 1 is characterized in that the end in lead-out wire (1), (15) is connected with binding post (16) and sheath (17) respectively.