CN210810528U

CN210810528U - Domestic liquid heater

Info

Publication number: CN210810528U
Application number: CN201921240899.9U
Authority: CN
Inventors: 李一峰; 李月春; 张帅
Original assignee: Bear Electrical Appliance Co Ltd
Current assignee: Bear Electrical Appliance Co Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-06-23
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses a domestic liquid heater, be equipped with heating element in the kettle body and base, the kettle body is the glass kettle body, and when the kettle body was placed on the base, kettle body laminating heating element still includes shape memory alloy spare and micro-gap switch, and micro-gap switch establishes ties with heating element's circuit, and shape memory alloy spare one end is connected in the heating element bottom, and the other end corresponds micro-gap switch's trigger part. The utility model discloses a domestic liquid heater, utilize the flexible characteristic of deformation that shape memory alloy spare can be along with temperature variation, set up shape memory alloy spare between dish and micro-gap switch generate heat, shape memory alloy spare controls opening of micro-gap switch through deformation and stops, play the effect of preventing dry combustion method protection to the dish that generates heat, and simultaneously, shape memory alloy spare's temperature detection upper limit is higher, shape memory alloy spare can be directly be connected with the dish that generates heat, it is better to guarantee temperature transmission effect, temperature measurement as the medium is more accurate for the air of needs, use reliably.

Description

Domestic liquid heater

Technical Field

The utility model belongs to the technical field of domestic appliance, concretely relates to domestic liquid heater.

Background

For the common household liquid heater, in the heating process, the overheating of the heating element can have larger potential safety hazard, therefore, the existing household liquid heater basically has the function of overheating protection or dry heating protection, the household liquid heater in the market, such as a health preserving kettle, a tea boiling device, a water pot and the like, especially a kettle body which is made of full glass and is closed at the bottom, mostly adopts a heating plate for heating, the heating plate is arranged at the bottom of the kettle body, the heating plate heats the water in the glass kettle through the heat conduction of a layer of glass, because the heating element and the kettle body are separated, the temperature of the kettle body can not be detected by a temperature sensor, and the temperature sensor can not directly detect the temperature of the heating plate, because the water in the glass kettle is not contacted with the heating plate, the temperature of the heating plate is higher than the water temperature in the glass kettle and can exceed the upper temperature detection limit of the temperature sensor, direct contact temperature detection can lead to temperature sensor temperature measurement effect inaccurate, consequently, can separate empty temperature detection with temperature sensor to the dish that generates heat with most products, but the problem that appears simultaneously is that, separate empty temperature detection can lead to temperature detection precision inaccurate, is unfavorable for the use of product reliable.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a domestic liquid heater with low costs, that the reliability is high.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a household liquid heater comprises a kettle body, a base, a heating component arranged in the base, a glass kettle body arranged in the kettle body, a shape memory alloy piece and a micro switch, wherein the kettle body is attached to the heating component when placed on the base, one end of the shape memory alloy piece is connected to the bottom of the heating component, the other end of the shape memory alloy piece corresponds to a trigger part of the micro switch, the shape memory alloy piece deforms according to the temperature of the heating component, when the temperature of the heating component reaches a preset temperature, the shape memory alloy piece deforms and extends to the trigger part of the micro switch to break off the circuit of the heating component, and when the temperature of the heating component is lower than the preset temperature, the shape memory alloy piece recovers to deform and breaks away from the trigger part of the micro switch, to complete the circuit of the heat generating component.

Compared with the prior art, the utility model discloses a domestic liquid heater, utilize the flexible characteristic of warping that shape memory alloy spare can be along with temperature variation, set up shape memory alloy spare between dish and micro-gap switch generate heat, shape memory alloy spare controls opening of micro-gap switch through deformation and stops, play the effect of preventing dry combustion method protection to the dish that generates heat, and simultaneously, shape memory alloy spare's temperature detection upper limit is higher, shape memory alloy spare can be directly be connected with the dish that generates heat, it is better to guarantee temperature transmission effect, temperature measurement more accurate as the medium for the needs air, the control mode that utilizes shape memory alloy spare physics to warp replaces traditional electronic control mode, it is more reliable to use, and is low in cost.

Furthermore, the heating assembly comprises a heating disc and a heating element for providing heat for the heating disc, the shape memory alloy part is in a spiral shape, and one end of the shape memory alloy part is fixed at the bottom of the heating disc through a first connecting piece; through setting up like this, heliciform shape memory alloy spare structural strength is higher, and the area is big when promoting micro-gap switch's trigger part, and thrust effect is good.

Further, a hollow mounting part is arranged at the bottom of the heating disc, the mounting part is connected with the bottom of the heating disc, the first connecting piece is a screw, and the shape memory alloy piece is fixed in the mounting part through the screw; through the arrangement, the shape memory alloy part is fast to assemble and convenient to operate in a screw connection mode.

Furthermore, the heating element is a heating tube, the heating tube is arranged at the bottom of the heating plate in a surrounding manner, the shape memory alloy piece is arranged in the middle of the bottom of the heating plate, and the shape memory alloy piece and the heating tube are arranged in a staggered manner; through the arrangement, the temperature detection effect of the shape memory alloy part is more accurate, and the whole structure is compact.

Furthermore, the heating component is positioned inside the base, the microswitch is positioned outside the base, the shape memory alloy piece penetrates through the base, the microswitch is positioned below the shape memory alloy piece, and the shape memory alloy piece is vertically arranged; through setting up like this, the production assembly is convenient.

Further, when the shape memory alloy part is not deformed and elongated, the distance between the other end of the shape memory alloy part and the trigger part of the microswitch is 4-7 mm; through the arrangement, the shape memory alloy part can be heated to extend to push the trigger part of the microswitch, and the trigger effect is good.

Further, the preset temperature is [180 degrees, 200 degrees ]; through setting up like this, effectively avoid the dish that generates heat to take place dry combustion method or overheated condition.

Further, the base is provided with a kettle body installation cavity, the bottom of the kettle body is placed in the kettle body installation cavity, the bottom of the base is provided with a connecting hole and an avoiding hole, the micro switch is clamped on the support, the support penetrates through the connecting hole through a second connecting piece to be connected with the bottom of the base, and the other end of the shape memory alloy piece is close to one side of the micro switch through the avoiding hole; through setting up like this, hide the heating element in the base, avoid user's touching heating element, guarantee the reliability of product.

Furthermore, the lower part of the kettle body is provided with a contraction part, the cross sectional area of the contraction part is smaller than that of the adjacent part of the upper part of the kettle body and the contraction part, when the lower part of the kettle body is placed in the kettle body installation cavity, the contraction part is inserted into the kettle body installation cavity, and the surface of the kettle body and the surface of the base are in smooth transition; through setting up like this, domestic liquid heater appearance lines aesthetic feeling is good.

Drawings

FIG. 1 is an assembled cross-sectional view of a heating element (shape memory alloy member in a contracted state)

FIG. 2 is an assembly view of the heating element (shape memory alloy member in an expanded state)

FIG. 3 is an exploded view of a domestic liquid heater

FIG. 4 is a schematic circuit diagram of a household liquid heater

Detailed Description

The technical scheme of the utility model is described below with the accompanying drawings:

referring to fig. 1 to 4, the household liquid heater of the present invention comprises a kettle body 7 and a base 8, wherein the kettle body 7 is a glass kettle body, a heating element and a power board 50 are arranged in the base 8, when the kettle body 7 is placed on the base 8, the kettle body 7 is attached to the heating element, the heating element comprises a heating plate 1 and a heating element 2 for providing heat for the heating plate 1, and further comprises a shape memory alloy member 3 and a micro switch 4, the heating element 2 and the power board 50 are connected in series, one end of the shape memory alloy member 3 is connected to the bottom of the heating plate 1, the other end of the shape memory alloy member corresponds to a trigger part of the micro switch 4, the shape memory alloy member 3 deforms according to the temperature change transmitted by the heating plate 1, when the temperature of the heating element reaches the preset temperature, the shape memory alloy piece 3 deforms and extends to touch the trigger part of the microswitch 4 so as to disconnect the circuit of the heating element 2, and when the temperature of the heating component is lower than the preset temperature, the shape memory alloy piece 3 recovers to deform and is separated from the trigger part of the microswitch 4 so as to connect the circuit of the heating element 2.

In this embodiment, when the shape memory alloy member 3 is not deformed and elongated, the distance between the other end of the shape memory alloy member 3 and the trigger portion of the micro switch 4 is 4-7mm, which is convenient for the shape memory alloy member 3 to be heated and elongated to push the trigger portion of the micro switch 4, the trigger effect is good, the preset temperature is [180 degrees, 200 degrees ], the dry burning or overheating of the heating plate 1 is effectively avoided, the shape memory alloy member 3 reaches a certain temperature according to the heating plate 1, for example, about 180 degrees, the heating element 2 needs to be stopped to work, but in principle, the temperature is lower than the certain temperature, because a certain temperature difference exists between the shape memory alloy member 3 and the heating plate 1. When the kettle body 7 is not boiled with water, the temperature of the heating plate 1 is far higher than that under the normal condition. The proper shape memory alloy part 3 is selected according to the dry burning temperature, and the safe temperature that the product can bear the heating plate 1 is about 200 ℃, so the deformation temperature of the spring of the memory alloy is preferably 190 and 200 ℃.

The Shape Memory Alloy (SMA) is a material composed of two or more metal elements, which is used in the prior art, has a shape memory effect through thermal elasticity and martensite phase transformation and inversion thereof, and has a property of being capable of stretching out or shortening deformation along with temperature change. The shape memory effect is exemplified by a spring made of a memory alloy, which is put in hot water, the length of the spring is immediately elongated, and it is immediately restored to its original shape when put in cold water.

Compared with the prior art, the utility model discloses a domestic liquid heater, utilize the flexible characteristic of warping of shape memory alloy spare 3 can be along with temperature variation, set 1 and micro-gap switch 4 with shape memory alloy spare 3 setting generating heat, shape memory alloy spare 3 controls opening of micro-gap switch 4 through deformation and stops, play the effect of preventing dry combustion method protection to dish 1 that generates heat, and simultaneously, shape memory alloy spare 3's temperature detection upper limit is higher, shape memory alloy spare 3 can be directly be connected with dish 1 that generates heat, it is better to guarantee temperature transmission effect, it is more accurate for the temperature controller temperature measurement that needs the air as the medium, utilize the control mode that 3 physics of shape memory alloy spare warp to replace traditional electronic control mode, use more reliably, and is with low costs.

Referring to fig. 1 to 3, in an embodiment, the shape memory alloy member 3 is in a spiral shape, one end of the shape memory alloy member 3 is fixed at the bottom of the heating plate 1 through a first connecting member 11, specifically, a hollow mounting portion 12 is arranged at the bottom of the heating plate 1, the mounting portion 12 is connected with the bottom of the heating plate 1, preferably integrally arranged, a connecting portion 120 is arranged in the mounting portion 12, the connecting portion 120 is provided with a screw hole, the first connecting member 11 is a screw, and a spiral ring at the upper end of the shape memory alloy member 3 is connected with the connecting portion 120 through a screw and fixed in the mounting portion 12; through setting up like this, 3 structural strength of heliciform shape memory alloy spare are higher, and the area of action is big when promoting micro-gap switch 4's trigger part, and thrust is effectual, adopts the mode of screwed connection, and 3 assemblages of shape memory alloy spare are swift, convenient assembly.

In one embodiment, the heating component is located inside the base 8, the micro switch 4 is located outside the base 8, the shape memory alloy piece 3 penetrates through the base 8, the micro switch 4 is located below the shape memory alloy piece 3, and the shape memory alloy piece 3 is vertically arranged.

In one embodiment, the heating element 2 is a heating tube, the heating tube is arranged at the bottom of the heating plate 1 in a surrounding manner, the shape memory alloy part 3 is arranged in the middle of the bottom of the heating plate 1, and the shape memory alloy part 3 and the heating tube are arranged in a staggered manner; through the arrangement, the temperature detection effect of the shape memory alloy part 3 is more accurate, and the whole structure is compact.

In one embodiment, the upper end of the kettle body 7 is covered with a kettle cover 73, the base 8 is provided with a kettle body installation cavity 81, the bottom of the kettle body 7 is placed in the kettle body installation cavity 81, the middle part of the bottom of the base 8 is provided with a avoiding hole 82, a connecting hole 83 is arranged outside the avoiding hole 82, the bottom of the heating plate 1 is provided with a connecting column 13 corresponding to the connecting hole 83, and also comprises a bracket 6, the microswitch 4 is clamped on the bracket, specifically, the bracket 6 is provided with an installation groove 60, the micro switch 4 is clamped in the mounting groove 60, the bracket 6 passes through the connecting hole 83 through a second connecting piece (such as a screw and other connecting pieces) to be connected with the bottom of the base 8, so that the micro switch 4 is arranged below the heating plate 1, the other end of the shape memory alloy piece 3 approaches one side of the microswitch 4 through the avoidance hole 82; through setting up like this, hide heating element in base 8, avoid the user to touch heating element, guarantee the reliability of product.

In one embodiment, the lower part of the can 7 has a constriction 71, the cross-sectional area of the constriction 71 is smaller than that of the upper part of the can 7 adjacent to the constriction 71, when the lower part of the can 7 is placed in the can mounting cavity 81, the constriction 71 is inserted into the can mounting cavity 81, and the surface of the can 7 smoothly transitions with the surface of the base; through setting up like this, domestic liquid heater appearance lines aesthetic feeling is good.

The utility model discloses a domestic liquid heater during operation, when the dish 1 temperature that generates heat reaches when predetermineeing the temperature, shape memory alloy 3 takes place deformation, shape memory alloy 3 can extend the portion of triggering of reacing micro-gap switch 4, the thrust effect that produces at the deformation promotes micro-gap switch 4 and triggers the portion and make micro-gap switch 4 closed down, when micro-gap switch 4 closed, the circular telegram of heating element 2 and power supply line 5 is connected the disconnection, make heating element 2 stop work, thereby stop the heating to dish 1 that generates heat. After the heating plate 1 stops heating, the temperature can be slowly reduced, at the moment, the shape memory alloy part 3 can contract and recover deformation, and the shape memory alloy part leaves the triggering part of the microswitch 4, the microswitch 4 is automatically opened, the heating element 2 is connected with the power supply circuit 5 in an electrified way, and the heating element 2 recovers work and continues to heat the heating plate 1. The heating plate 1 repeats the above-described operation process. The dry burning prevention protection is realized.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A domestic liquid heater, characterized by: the kettle comprises a kettle body, a base, a heating component arranged in the base, a glass kettle body, a shape memory alloy part and a micro switch, wherein the kettle body is attached to the heating component when placed on the base, one end of the shape memory alloy part is connected to the bottom of the heating component, the other end of the shape memory alloy part corresponds to a trigger part of the micro switch, the shape memory alloy part deforms according to the temperature of the heating component, when the temperature of the heating component reaches a preset temperature, the shape memory alloy part deforms and extends to the trigger part of the micro switch to break off the circuit of the heating component, and when the temperature of the heating component is lower than the preset temperature, the shape memory alloy part recovers to deform and breaks away from the trigger part of the micro switch, to complete the circuit of the heat generating component.

2. The domestic liquid heater of claim 1, wherein the heating assembly comprises a heating plate and a heating element for providing heat to the heating plate, the shape memory alloy member is in a spiral shape, and one end of the shape memory alloy member is fixed to the bottom of the heating plate through a first connecting member.

3. The domestic liquid heater of claim 2, wherein the bottom of the heating plate is provided with a hollow mounting portion, the mounting portion is connected with the bottom of the heating plate, the first connecting member is a screw, and the shape memory alloy member is fixed in the mounting portion through the screw.

4. A domestic liquid heater according to any of claims 1 to 3, wherein the heat generating component is located inside the base, the micro-switch is located outside the base, the shape memory alloy member extends through the base, the micro-switch is located below the shape memory alloy member, and the shape memory alloy member is vertically arranged.

5. The domestic liquid heater of claim 2, wherein the heating element is a heating tube, the heating tube is circumferentially disposed at the bottom of the heating tray, the shape memory alloy member is disposed at the middle of the bottom of the heating tray, and the shape memory alloy member is disposed in a staggered manner with respect to the heating tube.

6. A domestic liquid heater according to any one of claims 1 to 3, wherein the other end of the member is spaced from the trigger portion of the microswitch by a distance of 4-7mm when the member is undeformed and extended.

7. A domestic liquid heater according to any of claims 1 to 3, wherein the preset temperature is [180 degrees, 200 degrees ].

8. A domestic liquid heater according to claim 4, wherein: the base is provided with a kettle body installation cavity, and the bottom of the kettle body is placed in the kettle body installation cavity;

the base bottom is equipped with the connecting hole and dodges the hole, still includes the support, the micro-gap switch card is established on the support, the support passes through the second connecting piece the connecting hole is connected bottom the base, the shape memory alloy spare other end warp dodge the hole to micro-gap switch one side is close to.

9. A domestic liquid heater according to claim 8, wherein: the lower part of the kettle body is provided with a contraction part, the cross sectional area of the contraction part is smaller than that of the adjacent part of the upper part of the kettle body and the contraction part, when the lower part of the kettle body is placed in the kettle body installation cavity, the contraction part is inserted into the kettle body installation cavity, and the surface of the kettle body and the surface of the base are in smooth transition.