CN210643692U

CN210643692U - Temperature sensing assembly

Info

Publication number: CN210643692U
Application number: CN201920966277.8U
Authority: CN
Inventors: 田秘; 苏展勤
Original assignee: Guangzhou K Kou Electrical Appliance Technology Co ltd
Current assignee: Guangzhou Jigu Electric Appliance Co ltd
Priority date: 2019-06-25
Filing date: 2019-06-25
Publication date: 2020-06-02
Anticipated expiration: 2029-06-25

Abstract

The utility model relates to a temperature sensing subassembly belongs to household electrical appliances technical field. The temperature sensing assembly includes: the first temperature detection piece comprises a shell, and a temperature sensing probe, an insulator, a first signal wire and a second signal wire which are arranged in the shell, wherein the temperature sensing probe is fixed by the insulator and is in direct or indirect contact with the shell; and the second temperature detection assembly comprises a first signal input device and a second signal input device, and the first signal input device and the second signal input device are respectively arranged at positions matched with the first signal output end and the second signal output end. The temperature sensing assembly can realize accurate temperature detection, can clean the kettle body and has the advantages of convenience in use and high temperature detection precision.

Description

Temperature sensing assembly

Technical Field

The utility model relates to a household electrical appliance technical field especially relates to a temperature sensing subassembly.

Background

At present, for a liquid heater, a temperature detecting element is generally used for sensing the temperature of a liquid to be heated and feeding the temperature to a control system, so that the starting or power of a heating device is controlled, and the purpose of controlling the liquid heating process is achieved.

The conventional liquid heater includes an integrated type and a detachable type, wherein the integrated type liquid heater is used as a whole in order to fixedly assemble the kettle body and the heating device. The liquid heater can directly arrange the temperature detecting element in the kettle body to directly detect the liquid temperature, and has the characteristic of accurate temperature detection. However, due to the existence of the circuit system, the liquid heater needs to avoid water inflow, and cannot be cleaned integrally.

The kettle body of the separable liquid heater is separated from the heating plate, the heating element, the circuit system and the like are arranged in the heating plate (base), the kettle body is arranged on the heating plate during heating, and the kettle body is taken down for use after the heating is completed. In order to achieve the purpose that the kettle body can be cleaned, the temperature detecting element of the liquid heater is usually arranged on the heating plate, the temperature sensing part is directly contacted with the bottom of the kettle body, and the temperature detecting function is achieved through conduction of the outer wall of the kettle body. However, in daily use, the exterior of the kettle bottom may be contaminated with stains, or dust is attached to the surface of the probe, which may cause inaccurate temperature detection or even failure, and may lead to poor temperature control effect in a light case, and may lead to interference or accidents in a heavy case.

Meanwhile, a temperature detecting element conducting through wireless signals can be mounted on the kettle body, and the purpose of accurate temperature measurement is achieved. Moreover, such temperature detecting elements have the disadvantages of high cost, increased difficulty in designing the circuit system structure, easy external interference and the like.

Disclosure of Invention

Therefore, it is necessary to provide a temperature sensing assembly for the liquid heater, which can realize accurate temperature detection and clean the kettle body for temperature sensing, and has the advantages of convenient use and high temperature detection precision.

A temperature sensing assembly comprising:

the first temperature detection piece comprises a shell, and a temperature sensing probe, an insulator, a first signal wire and a second signal wire which are arranged in the shell, wherein the temperature sensing probe is fixed by the insulator and is in direct or indirect contact with the shell, the two ends of the temperature sensing probe are respectively provided with the first signal wire and the second signal wire, the first signal wire and the second signal wire are isolated by the insulator, and the first signal wire and the second signal wire are provided with a first signal output end and a second signal output end on the outer surface of the first temperature detection piece;

and the second temperature detection assembly comprises a first signal input device and a second signal input device, the first signal input device and the second signal input device are respectively arranged at positions matched with the first signal output end and the second signal output end, and the first signal input device and the second signal input device are both provided with connecting ends used for connecting the control mainboard.

When the temperature sensing assembly is used, the first temperature detecting piece can be directly embedded into the bottom of the kettle, so that the shell of the first temperature detecting piece becomes a part of the bottom wall of the kettle, the temperature of liquid in the kettle can be directly sensed and detected, and the temperature sensing assembly has an accurate detection effect; and the second temperature detection component is assembled on the base of the kettle, and the detection signal of the temperature sensing probe is transmitted to the control mainboard from the first temperature detection component and the second temperature detection component which can be contacted/separated in a contact type transmission mode.

At the moment, because a weak electric system (signal conduction) and a strong electric system (electric quantity supply) in a heating system of the separable liquid heater are separately designed, the strong electric system and a control main board are arranged in the base, and a temperature sensing probe part in the weak electric system is attached to the kettle body, the temperature detection can be accurate, and the problem that the whole kettle body of the liquid heater cannot be cleaned or the wireless transmission cost is high can be solved.

In one embodiment, the housing includes a side wall and a top wall, a cavity structure with an opening at one end is formed, the temperature sensing probe is in direct or indirect contact with the top wall, the insulator fills the housing and forms an insulating surface at the opening end of the housing, and the first signal output end and the second signal output end are arranged on the insulating surface. The temperature sensing probe is arranged on the top wall of the shell (namely the bottom wall of the kettle body) and is a better temperature sensing position.

In one embodiment, the first signal output end and the second signal output end are provided with contact surfaces which are in contact with the first signal input device and the second signal input device. The stability of the transmission can be improved by means of surface-to-surface transmission.

In one embodiment, the first signal output terminal is a conductive sheet or block made of conductive material;

or

A water injection channel for water injection is further arranged in the first temperature detection piece, and the first signal output end is an annular conductive sleeve and arranged around the water injection channel;

or

The first signal output end is a conductive ring made of conductive material.

In one embodiment, the housing is made of a conductive material, and the second signal conducting wire is conducted with the housing, so that the housing is a second signal output end;

or

A water injection channel for water injection is further arranged in the first temperature detection piece, the shell is made of a conductive material, and the second signal output end is an annular conductive sleeve and arranged around the water injection channel;

or

The second signal output end is a conductive sheet or a conductive block made of a conductive material;

or

The second signal output end is a conductive ring made of conductive material.

It can be understood that the arrangement of the first signal output end and the second signal output end can be flexibly combined and adjusted according to the overall design of the water kettle for specific application.

In one embodiment, the second temperature detecting assembly further comprises a fixing member, and the first signal input device and the second signal input device are both mounted on the fixing member. The second temperature detection assembly and the kettle base can be fixedly arranged through the fixing piece.

In one embodiment, the second temperature detecting assembly further includes a first elastic member and a second elastic member, the first signal input device and the second signal input device are both mounted on the fixing member, one end of the first elastic member abuts against the fixing member, the other end of the first elastic member abuts against the first signal input device, one end of the second elastic member abuts against the fixing member, and the other end of the second elastic member abuts against the second signal input device. Through the use of the elastic piece and the elastic force abutting, the signal input device has the tendency of moving towards the signal output device, and the reliability and the stability of the contact connection are ensured.

In one embodiment, the first signal input device and the second signal input device are both columnar, and the first elastic member and the second elastic member are both springs respectively sleeved on the first signal input device and the second signal input device.

In one embodiment, the temperature sensing probe is indirectly contacted with the bottom wall through heat-conducting silicone grease. Through coating heat conduction silicone grease, make the conduction of diapire and temperature sensing probe more abundant thorough, improve the temperature measurement accuracy.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses a temperature sensing subassembly, can be used to among the liquid heater, through with weak electric system (signal conduction) and forceful electric power system (electric quantity supply) separately design among the heating system, set up forceful electric power system and control mainboard part in with kettle complex base, set up the temperature sensing probe part (being first temperature detection spare) among the weak electric system in the kettle body diapire, reach the effect of accurate temperature measurement, and adopt the mode of contact conduction, with the detection signal of temperature sensing probe by the first temperature detection spare and the conduction of second temperature detection subassembly of contactable/separation to the control mainboard, the unable washing of conventional liquid heater kettle body or the high problem of wireless transmission cost have been solved successfully.

And through optimizing each component, the difficulty of the installation process is reduced, and the signal conduction reliability and stability are improved.

Drawings

FIG. 1 is a schematic view of a temperature sensing element according to embodiment 1;

FIG. 2 is a schematic structural view of a first temperature detecting member in embodiment 2;

FIG. 3 is a schematic structural view of a temperature sensing element according to embodiment 3;

FIG. 4 is a schematic view of a liquid heater according to embodiment 4;

FIG. 5 is a partial enlarged view of portion A of FIG. 4;

fig. 6 is a schematic structural view of a first temperature detection member in embodiment 4.

Wherein: 110. a bottom wall; 111. a housing; 120. a side wall; 131. a temperature sensing probe; 132. an insulator; 133. a first signal conductor; 134. a second signal conductor; 135. a first signal output terminal; 136. a second signal output terminal; 137. a water injection channel; 200. a base; 210. a heating device; 230. a control main board; 241. a first signal input device; 242. a second signal input device; 243. a fixing member; 244. a first elastic member; 245. a second elastic member.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. The preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present, while it may be connected by contact or by contactless signals.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

A temperature sensing assembly comprising: a first temperature detecting member and a second temperature detecting member.

The insulator can be made of epoxy resin and the like, and the temperature sensing probe can be a temperature sensing resistor and the like. The first temperature detecting component is arranged on the bottom wall of the heater kettle body, the second temperature detecting component is arranged on the base, and the first temperature detecting component and the second temperature detecting component are matched and conducted in a contact mode.

It can be understood, the mode that first temperature detect piece was installed in the diapire can be diversified, only need satisfy fixed, sensing temperature and signal conduction requirement can, the utility model discloses in, preferred, first temperature detect piece directly inlays in the kettle bottom, makes the casing of this first temperature detect piece become the partly of kettle diapire.

In order to improve the stability of transmission, first signal output end and second signal output end all are equipped with the contact surface of first signal input device and second signal input device contact. Compared with the point-point contact mode through the section of the lead, the mode of surface-surface transmission has better effect.

The design of the first signal output terminal includes the following types:

the first signal output end is a conductive sheet or a conductive block made of a conductive material; or a water injection channel for water injection is further arranged in the first temperature detection piece, the shell is made of a conductive material, and the first signal output end is an annular conductive sleeve and arranged around the water injection channel; or, the first signal output end is a conductive ring made of conductive material.

The design of the second signal output terminal includes the following types:

the second signal wire is communicated with the shell, so that the shell is a second signal output end; or, the shell and the bottom wall are both made of conductive materials, and the second signal lead is communicated with the shell and the bottom wall, so that the bottom wall is a second signal output end; or, the shell, the bottom wall and the side wall are all made of conductive materials, and the second signal conducting wire is communicated with the shell, the bottom wall and the side wall, so that the side wall is a second signal output end; or a water injection channel for water injection is further arranged in the first temperature detection part, the shell is made of a conductive material, and the second signal output end is an annular conductive sleeve and is arranged around the water injection channel; or the second signal output end is a conductive sheet or a conductive block made of a conductive material; or, the second signal output end is a conductive ring made of a conductive material.

It can be understood that the arrangement of the components in the first temperature detecting member and the second temperature detecting member can be adjusted and combined as required, but it is necessary to comply with the core gist of the present invention, for example, the following manners can be adopted:

in the first scheme, the shell is made of a conductive material, the first signal output end is a conductive sheet or a conductive block made of a conductive material, and the second signal wire is conducted with the shell, so that the edge part of the shell exposed at the bottom of the kettle body is a contact surface of the second signal output end.

According to the second scheme, a water injection channel for water injection is further arranged in the first temperature detection piece, the shell is made of a conductive material, the first signal output end is an annular conductive sleeve and is arranged around the water injection channel, and the second signal lead is communicated with the shell, so that the shell is the second signal output end;

according to the third scheme, a water injection channel for water injection is further arranged in the first temperature detection piece, the shell is made of a conductive material, the first signal output end is an annular conductive sleeve and is arranged around the water injection channel, and the second signal output end is a conductive sheet or a conductive block made of a conductive material;

according to the fourth scheme, a water injection channel for water injection is further arranged in the first temperature detection part, the first signal output end and the second signal output end are both annular conductive sleeves and are arranged around the water injection channel, and the first signal output end and the second signal output end are isolated by the insulator;

and in a fifth scheme, the first signal output end and the second signal output end are both conductive sheets or conductive blocks made of conductive materials.

Above-mentioned different embodiment all can realize the utility model discloses a purpose specifically can be according to the demand setting of different application scenes, nevertheless wherein regard as signal input device with the casing that conducting material (stainless steel) were made, has simple structure, advantage that the reliability is high.

The conductive material is a conductor material capable of realizing signal conduction, such as a metal material like stainless steel and alloy, a carbon fiber material, and the like.

Specifically, the shell and the annular conductive sleeve are both provided with edge parts extending along the plane of the bottom of the kettle body, and the edge parts are contact surfaces.

For the design of the second temperature detection assembly, it is preferable that the second temperature detection assembly further includes a fixing member, a first elastic member and a second elastic member, the fixing member is installed on the base, the first signal input device and the second signal input device are both installed on the base, one end of the first elastic member is abutted on the fixing member, the other end of the first elastic member is abutted on the first signal input device, one end of the second elastic member is abutted on the fixing member, and the other end of the second elastic member is abutted on the second signal input device. Through the use of the elastic piece and the elastic force abutting, the signal input device has the tendency of moving towards the signal output device, and the reliability and the stability of the contact connection are ensured.

Furthermore, the first signal input device and the second signal input device are both columnar, and the first elastic piece and the second elastic piece are both springs and are respectively sleeved on the first signal input device and the second signal input device.

In some embodiments, the temperature sensing probe is in indirect contact with the housing through a thermally conductive silicone. Through coating heat conduction silica gel, make the conduction of diapire and temperature sensing probe more abundant thorough, improve the temperature measurement accuracy.

In some embodiments, the heating device is an electromagnetic heating coil. The liquid heater adopts an electromagnetic oven type heating mode, and has the advantages of long service life, rapid temperature rise, high thermal efficiency, large effective water containing capacity, easy cleaning of the kettle body and the like.

Example 1

A temperature sensing assembly, as shown in fig. 1, comprising: a first temperature detecting member and a second temperature detecting member.

The first temperature detecting element comprises a shell 111, a temperature sensing probe 131, an insulator 132, a first signal wire 133 and a second signal wire 134, wherein the temperature sensing probe 131, the insulator 132, the first signal wire 133 and the second signal wire 134 are arranged in the shell 111, the temperature sensing probe 131 is fixed by the insulator 132 and directly contacts with the shell, the first signal wire 133 and the second signal wire 134 are respectively arranged at two ends of the temperature sensing probe, the first signal wire 133 and the second signal wire 134 are isolated by the insulator, and the first signal wire and the second signal wire are provided with a first signal output end 135 and a second signal output end 136 on the outer surface of the first temperature detecting element;

in this embodiment, a water injection channel 137 for injecting water is further disposed in the first temperature detection element, the housing 111 is made of a conductive material, the first signal output end 135 is an annular conductive sleeve and disposed around the water injection channel 137, and the second signal conducting wire 134 is conducted with the housing 111, so that the housing 111 is the second signal output end 136.

The second temperature detection assembly comprises a first signal input device 241 and a second signal input device 242, the first signal input device and the second signal input device are respectively arranged at positions matched with the first signal output end and the second signal output end, and the first signal input device and the second signal input device are both provided with connecting ends used for being connected with a control mainboard.

The first signal output end 135 and the second signal output end 136 are provided with contact surfaces contacting the first signal input device 241 and the second signal input device 242. Specifically, the housing 111 and the annular conductive sleeve as the first signal output end 135 are both provided with an edge portion extending along the bottom plane of the kettle body, and the edge portion is a contact surface, as shown in fig. 3.

As to the design of the second temperature detecting assembly, specifically, the second temperature detecting assembly further includes a fixing member 243, a first elastic member 244 and a second elastic member 245, the fixing member 243 can be installed on the base of the liquid heater, one end of the first elastic member abuts against the fixing member 243, the other end of the first elastic member abuts against the first signal input device 241, one end of the second elastic member 244 abuts against the fixing member 243, and the other end of the second elastic member abuts against the second signal input device 242. Through the use of the elastic piece and the elastic force abutting, the signal input device has the tendency of moving towards the signal output device, and the reliability and the stability of the contact connection are ensured.

The first signal input device 241 and the second signal input device 242 are both columnar, and the first elastic member 136 and the second elastic member 245 are both springs and are respectively sleeved on the first signal input device 241 and the second signal input device 242.

Example 2

A temperature sensing assembly substantially the same as that of embodiment 1 except that, in this embodiment, the first temperature detecting member is designed to: the shell is made of a conductive material, the first signal output end 135 is a conductive block made of a conductive material, the second signal wire is conducted with the shell, so that the edge part of the shell exposed at the bottom of the kettle body is a contact surface of the second signal output end, and the structure of the first temperature detector is shown in fig. 2.

Example 3

A liquid heater, as shown in fig. 3, is substantially similar to the liquid heater of embodiment 1, except that in this embodiment, the first signal input device 241 and the second signal input device 242 are both located on the same side of the water filling channel 137.

Example 4

A liquid heater employing the temperature sensing assembly of embodiment 1, as shown in fig. 4-6, comprising: a kettle body and a base.

The kettle body comprises: the heating device comprises a bottom wall 110, a side wall 120 and a first temperature detecting piece, wherein a containing cavity for containing a to-be-heated liquid is formed by enclosing the bottom wall 110 and the side wall 120, and the first temperature detecting piece is arranged on the bottom wall 110; as shown in fig. 5 to 6, the first temperature detecting element includes a temperature sensing probe 131, an insulator 132, a first signal wire 133 and a second signal wire 134, the temperature sensing probe 131 is fixed by the insulator 132 and directly contacts with the outer surface of the bottom wall, the first signal wire 133 and the second signal wire 134 are respectively disposed at two ends of the temperature sensing probe 131, the first signal wire 133 and the second signal wire 134 are isolated by the insulator 132, and the first signal wire 133 and the second signal wire 134 are provided with a first signal output end 135 and a second signal output end 136 at the bottom of the kettle body.

In this embodiment, a housing 111 is disposed on the bottom wall, and the first temperature detecting member is installed in the housing 111. By mounting the first temperature sensing member in the housing 111. The difficulty of the installation process is reduced, the integrity and the beauty of the appearance of the kettle body are ensured, and the first temperature detection piece can be arranged at a better temperature detection position.

The base includes: the heating device 210, the control mainboard 230 and the second temperature detection assembly, the second temperature detection assembly includes a first signal input device 241 and a second signal input device 242, the first signal input device 241 and the second signal input device 242 are respectively arranged at the positions matched with the first signal output end 135 and the second signal output end 136, the first signal input device 241 and the second signal input device 242 are both connected with the control mainboard 230, and the heating device 210 is connected with the control mainboard 230.

The first signal output end 135 and the second signal output end 136 are provided with contact surfaces contacting the first signal input device 241 and the second signal input device 242. Specifically, the housing 111 and the annular conductive sleeve as the first signal output end 135 are both provided with an edge extending along the bottom plane of the kettle body, and the edge is a contact surface, as shown in fig. 6.

As to the design of the second temperature detecting assembly, specifically, the second temperature detecting assembly further includes a fixing member 243, a first elastic member 244 and a second elastic member 245, the fixing member is installed on the base 200, the first signal input device 241 and the second signal input device 242 are both installed on the base 200, one end of the first elastic member abuts against the fixing member 243, the other end of the first elastic member abuts against the first signal input device 241, one end of the second elastic member 244 abuts against the fixing member 243, and the other end of the second elastic member abuts against the second signal input device 242. Through the use of the elastic piece and the elastic force abutting, the signal input device has the tendency of moving towards the signal output device, and the reliability and the stability of the contact connection are ensured.

The temperature control method of the liquid heater of the embodiment comprises the following steps:

temperature collection: the first temperature detection part transmits the sensed temperature signal to the second temperature detection component in a contact signal transmission mode and then transmits the temperature signal to the control mainboard;

temperature control: after receiving the temperature signal feedback, the control main board adjusts and controls the opening and closing and the power of a heating device (an electromagnetic valve heating coil) according to a preset program.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A temperature sensing assembly, comprising:

2. The temperature sensing assembly of claim 1, wherein the housing includes a side wall and a top wall forming a cavity structure having an open end, the temperature sensing probe being in direct or indirect contact with the top wall, the insulator filling the housing and forming an insulating surface at the open end of the housing, the first and second signal outputs being disposed on the insulating surface.

3. The temperature sensing assembly of claim 1, wherein the first and second signal outputs each have a contact surface for contacting the first and second signal inputs.

4. The temperature sensing assembly of claim 1, wherein the first signal output is a conductive sheet or block of conductive material;

or

The first signal output end is a conductive ring made of conductive material.

5. The temperature sensing assembly of claim 1, wherein the housing is made of an electrically conductive material, and the second signal conductor is in electrical communication with the housing to define the housing as a second signal output;

or

The second signal output end is a conductive ring made of conductive material.

6. The temperature sensing assembly of any one of claims 1-5, wherein the second temperature sensing assembly further comprises a fixture, and the first signal input device and the second signal input device are both mounted on the fixture.

7. The temperature sensing assembly of claim 6, wherein the second temperature detecting assembly further comprises a first elastic member and a second elastic member, the first signal input device and the second signal input device are both mounted on the fixing member, one end of the first elastic member abuts against the fixing member, the other end of the first elastic member abuts against the first signal input device, one end of the second elastic member abuts against the fixing member, and the other end of the second elastic member abuts against the second signal input device.

8. The temperature sensing assembly of claim 7, wherein the first and second signal input devices are each cylindrical, and the first and second resilient members are each a spring that is respectively fitted over the first and second signal input devices.

9. The temperature sensing assembly of claim 1, wherein the temperature sensing probe is in indirect contact with the bottom wall via a thermally conductive silicone grease.