CN2169967Y

CN2169967Y - Automatically controlled electric water heater for thermos bottle

Info

Publication number: CN2169967Y
Application number: CN 93231152
Authority: CN
Inventors: 邱祖培
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-06-09
Filing date: 1993-06-09
Publication date: 1994-06-22
Anticipated expiration: 2003-06-09

Abstract

The utility model relates to an automatically controlled electric water heater for thermoses, which is formed by the connection of an electric heating pipe and a switch case which is used as a thermos plug. The switch case is provided with a switch mechanism which is composed of a push rod, a dynamic and static contact, and a temperature sensing sheet which is flexuous in high temperature. The temperature sensing sheet is fixedly arranged on a heat transferring sheet which is on the upper part of a temperature controlling chamber on the switch box body. The utility model has the advantages of small size and simple and compact structure. The utility model can ensure the cutting of power supply after water is boiled, and the state of the power supply can not be reset.

Description

Automatically controlled electric water heater for thermos bottle

The utility model relates to a kind of thermos flask self-controlling electrothermal hydrophone, promptly has the thermos flask electric heater of boiling water autocontrol switch, and this self-controlling electrothermal hydrophone also can be applicable to the electric water-heating apparatus of other form.

Traditional thermos flask electric heater is that an electric heating tube is installed on the stopper of thermos flask, and the autocontrol switch that is used at present on the thermos flask electric heater has two kinds of forms, the one, make temperature-sensing element by the dish-shape component that thrermostatic bimetal-plate is done, water vapour in the bottle is carried out large-area temperature-sensitive implement control, this autocontrol switch is because of being subjected to the restriction of temperature-sensing element performance, be difficult to make operating temperature just on boiled water temperature, and boiled water temperature is variant with the difference of place to use; Moreover this autocontrol switch can not self-locking, and when water temperature dropped to certain value in the bottle, autocontrol switch can be from horizontal reset after the outage, and the energising heating is during use and inconvenient; Another form is to utilize the steam pressure of boiling water to push the votage control switch that diaphragm triggers, though this switch does not have the shortcoming of above-mentioned autocontrol switch, volume is big, installs to be difficult for firmly, and is difficult to make its decorative appearance to beautify.

The purpose of this utility model just is to overcome and avoid the shortcoming of prior art, and provides a kind of volume little, and is simple and compact for structure, guarantees to cut off the power supply behind the boiling water, and no longer resets the novel thermos flask self-controlling electrothermal hydrophone that convenience attractive in appearance is durable.

The utility model is to adopt following measure to realize its purpose.

A kind of thermos flask self-controlling electrothermal hydrophone, it is to be formed by connecting by electric heating tube with as the stifled switch enclosure of bottle, the switching mechanism that the thermal sensitive piece that is bending-like by push rod, sound contact and when the high temperature is formed is installed in switch enclosure, and the thermal sensitive piece fixed in position is on the heat transfer sheet on the top, temperature control chamber on the switch box body.Lower side at the switch box body has big venthole, and the bottom in temperature control chamber has a little air intake, and the sidewall in temperature control chamber has a little venthole.The front end of thermal sensitive piece folding has one can catch on the mouth that stops that stopping of moving contact colluded or had catch that an energy intercalation goes into moving contact.Thermal sensitive piece is strip thrermostatic bimetal-plate or memorial alloy sheet.The cross-sectional area of the little air intake on the temperature control chamber is 1～4mm ², the cross-sectional area of big venthole is 8～20mm ²

Another kind of thermos flask self-controlling electrothermal hydrophone, it is by bottle stopper, electric heating tube on the bottle stopper and the switch enclosure that is connected by the steam inlet pipe that is placed through in the bottle stopper are constituted, the switching mechanism that the thermal sensitive piece that is bending-like by push rod, sound contact and when the high temperature is formed is installed in switch enclosure, and the thermal sensitive piece fixed in position is on the heat transfer sheet on the top, temperature control chamber on the switch box body.The bottom in temperature control chamber has a little air intake, and the sidewall in temperature control chamber has little venthole, and steam inlet pipe is connected with little air intake, has a big venthole on the steam inlet pipe tube wall.The front end of thermal sensitive piece folding has one can catch on stopping of moving contact and collude or have the mouth that stops that catch on the moving contact is gone in an energy intercalation.Thermal sensitive piece is strip thrermostatic bimetal-plate or memorial alloy sheet.

The drawing of accompanying drawing is described as follows.

Fig. 1 is a front view of the present utility model.

Fig. 2 is the cutaway view along A-A direction among Fig. 1.

Fig. 3 is the vertical view along B-B direction among Fig. 2.

Fig. 4 is an another kind of structure connection layout of the present utility model.

Fig. 5 is along C-C direction vertical view among Fig. 4.

Fig. 6, Fig. 7 are the syndeton front view and the vertical view of a kind of thermal sensitive piece and heat transfer sheet.

Fig. 8, Fig. 9 are the syndeton front view and the vertical view of a kind of thermal sensitive piece and heat transfer sheet.

Figure 10 is a kind of annexation figure of thermal sensitive piece and moving contact.

Figure 11 and Figure 12, Figure 13 and Figure 14, Figure 15 and Figure 16 are respectively the left view and the front view of three kinds of thermal sensitive pieces and moving contact syndeton.

Below in conjunction with accompanying drawing the utility model is described further.

The utility model is to be connected and composed by electric heating tube (1) and switch enclosure, and it can have two kinds of versions, the one, and the bottom of switch enclosure (16) directly can be used as bottle is stifled; Another kind is that the top of electric heating tube (1) has a special-purpose bottle stopper (20), and bottle stopper (20) is gone up the steam inlet pipe (19) that interts and connected a switch enclosure (17).Switch box body (5) can serve as on the stifled switch enclosure (16) of bottle and has two ventholes (3) (4) greatly different in size thereby resistance is different, water vapour before the boiling water is all overflowed from the minimum big venthole (3) of resistance, only when water boils back generation air pressure, little venthole (4) just is able to dividing potential drop by part steam, makes the thermal sensitive piece of being made by thrermostatic bimetal-plate or memorial alloy sheet (10) that is in originally under the normality produce flexural deformation.A pair of dynamic and static contact (7) (8) is arranged in the switch enclosure (16), moving contact (7) by stretch out box outer push push rod (6) face contact fixed contact (8), also stopped simultaneously and keep in touch state, and continue heating by thermal sensitive piece (10).Behind the boiling water, thermal sensitive piece (10) temperature distortion is freed moving contact (7), and moving contact (7) is by elastic return original position itself, breaks away from fixed contact (8) and cuts off the power supply.The binding post (9) of electric heating tube (1) is connected in the power line (21) with the moving contact (7) and the fixed contact (8) that are installed on the contact shoe (15).When pressing was pushed push rod (6), the middle part of promotion moving contact (7) makes and fixed contact (8) joins, and the press points below, middle part of moving contact (7) is that catch is blocked by thermal sensitive piece (10) by a jut directly or indirectly, can not withdraw from the heating beginning.In the bottle water vapour of water when nearly seething with excitement because of the difference of venthole resistance by cross-sectional area greater than 10mm ²Big venthole (3) overflow, water vapour produces pressure after the water boiling, the water vapour after the dividing potential drop is able to by cross-sectional area less than 3mm ²Little air intake (13) enter temperature control chamber (12) and overflow along little venthole (4).Airtight the sealing of heat transfer sheet (11) that temperature control chamber (12) is made by copper, aluminum, sealing can be adopted modes such as tight fit or bonding, purpose is to stop steam to enter switch enclosure (16), heat transfer sheet (11) adopts modes such as pressing plate pressing or seam to make it tight and contacts with thermal sensitive piece (10), also available thermal sensitive piece (10) is directly as heat transfer sheet (11) and sealing temperature control chamber (12), and thermal sensitive piece (10) almost is subjected to be in the normality that shape does not have change less than heat in the boiling water cause.The steam temperature that enters behind the boiling water is heated and flexural deformation downwards it rapidly, makes moving contact (7) be freed the back and returns outage by self elasticity.Switch enclosure cover (2) can be done various decoratings, in order to beautifying indoor environment.Certainly, the switching mechanism in the switch enclosure (16) can also be replaced by Kick type self-locking thermostat.

Fig. 6～Fig. 9 represents the installation method of thermal sensitive piece (10) and heat transfer sheet (11), with heat transfer sheet (11) pressure injection in vinyl cover (22), again thermal sensitive piece (10) closely is connected with heat transfer sheet (11), vinyl cover (22) need with switch enclosure (16) on temperature control chamber (12) fluid-tight engagement and do not leak vapour, thermal sensitive piece (10) and heat transfer sheet (11) can also be made vertical connection use.Also can with thermal sensitive piece (10) on demand form directly be injected in the vinyl cover (22) and directly be subjected to temperature, and heat transfer sheet (11) is replaced.

The structural representation of Figure 10 for pushing from moving contact (7) far-end pushed push rod (6) and made stopping of moving contact (7) distortion back insertion thermal sensitive piece (10) collude (14), and thermal sensitive piece (10) is heated, and the contact breaks away from when moving downward.

Figure 11～Figure 16 is several hook joint modes of moving contact (7) and thermal sensitive piece (10).A hole or opening (24) are arranged on the thermal sensitive piece among Figure 11 and Figure 12 (10), the outstanding catch (23) of moving contact (7) is blocked; Figure 13 and Figure 14 have a long narrow catch (23) at moving contact (7) far-end, can enter the hole or the opening (24) of thermal sensitive piece (10) and are lockable; Figure 15 and Figure 16 push under the mode at moving contact (7) far-end, thermal sensitive piece (10) and moving contact (7) vertical direction adopt in moving contact (7) distal side to go out a catch (23) and insert the method that hole on the thermal sensitive piece (10) or opening (24) are lockable not simultaneously.

Fig. 4 and Fig. 5 represent the utility model of another kind of structure, settle the bottle stopper (20) of a special use in the top of electric heating tube (1), on bottle stopper (20), place a steam inlet pipe (19), have a big venthole (18) on the sidewall of steam inlet pipe (19), steam inlet pipe (19) connects a switch enclosure (17), construction of switch in construction of switch in the switch enclosure (17) switch enclosure (16) stifled with directly serving as bottle is identical, and steam inlet pipe (19) is communicated with by little air intake (13) with temperature control chamber (12) in the switch enclosure (17).

The utility model volume is little, and is simple and compact for structure, guarantees to cut off the power supply behind the boiling water, and no longer resets, and convenient attractive in appearance, safe and reliable, it is big that temperature sensing material adapts to range of choice.

Claims

1, thermos flask self-controlling electrothermal hydrophone, it is to be formed by connecting by electric heating tube with as the stifled switch enclosure of bottle, it is characterized in that being installed with in the switch enclosure switching mechanism that the thermal sensitive piece that is bending-like by push rod, sound contact and when the high temperature is formed, the thermal sensitive piece fixed in position is on the heat transfer sheet on the top, temperature control chamber on the switch box body.

2, thermos flask self-controlling electrothermal hydrophone according to claim 1 is characterized in that having big venthole at the lower side of switch box body, and the bottom in temperature control chamber has a little air intake, and the sidewall in temperature control chamber has a little venthole.

3, thermos flask self-controlling electrothermal hydrophone according to claim 2, the front end folding that it is characterized in that thermal sensitive piece have one can catch on stopping of moving contact and collude or have the mouth that stops that catch on the moving contact is gone in an energy intercalation.

4,, it is characterized in that described thermal sensitive piece is strip thrermostatic bimetal-plate or memorial alloy sheet according to claim 1 or 2 or 3 described thermos flask self-controlling electrothermal hydrophones.

5, thermos flask self-controlling electrothermal hydrophone according to claim 4, the cross-sectional area that it is characterized in that little air intake is 1～4mm ², the cross-sectional area of big venthole is 8～20mm ²

6, thermos flask self-controlling electrothermal hydrophone, it is by bottle stopper, electric heating tube on the bottle stopper and the switch enclosure that is connected by the steam inlet pipe that is placed through in the bottle stopper are constituted, it is characterized in that being installed with in the switch enclosure by push rod, sound contact and the switching mechanism that is the thermal sensitive piece composition of bending-like when high temperature, the thermal sensitive piece fixed in position is on the heat transfer sheet on the top, temperature control chamber on the switch box body.

7, thermos flask self-controlling electrothermal hydrophone according to claim 6 is characterized in that the bottom in temperature control chamber has a little air intake, and the sidewall in temperature control chamber has little venthole, and steam inlet pipe is connected with little air intake.

8, thermos flask self-controlling electrothermal hydrophone according to claim 7 is characterized in that having on the steam inlet pipe tube wall a big venthole.

9, thermos flask self-controlling electrothermal hydrophone according to claim 8, the front end folding that it is characterized in that thermal sensitive piece have one can catch on stopping of moving contact and collude or have the mouth that stops that catch on the moving contact is gone in an energy intercalation.

10,, it is characterized in that described thermal sensitive piece is strip thrermostatic bimetal-plate or memorial alloy sheet according to claim 6 or 7 or 8 or 9 described thermos flask self-controlling electrothermal hydrophones.