WO2024119825A1 - Handheld temperature probe used for food material cooking and fabricating method therefor - Google Patents

Abstract

A handheld temperature probe (10) used for food material cooking. A probe assembly (11) of the temperature probe (10) comprises a tube body (111) and a thermocouple (112), the tube body (111) being provided with an accommodation cavity (1111), at least part of the thermocouple (112) being arranged in the accommodation cavity (1111), and a working end (113a) of the thermocouple being fixedly arranged on the tube body (111). At least part of the working end (113a) of the thermocouple is exposed from the tube body (111), or the working end (113a) of the thermocouple is in direct contact with the tube body (111), so as to measure the temperature. Accordingly, compared with the distance between a working end (221) of an existing thermocouple and an object to be measured at least comprising the thickness of a tube body (21) and an amount of a heat conduction material (23), when the temperature probe (10) is in use, the distance between the working end (221) of the thermocouple and the object to be measured is significantly shortened, thus shortening the response time of the temperature probe (10). Also disclosed is a fabricating method for the handheld temperature probe (10).

Description

Handheld temperature probe for food cooking and processing method thereof

The content regarding the centrifugal process involved in the claims of this application is not recorded in the utility model patent with application number 202223297211.5 as the priority, but is recorded in the invention patent with application number 202211559422.3 as the priority.

Technical Field

The present application relates to the technical field of temperature sensors, and in particular to a handheld temperature probe for cooking food and a processing method thereof.

Background technique

With the advancement of technology and the improvement of people's requirements for the taste and nutrition of food, people expect to more accurately control the temperature elements in the cooking process. In some embodiments, they expect to more accurately control the temperature of the food and the temperature of the water used to heat the food. Therefore, a handheld temperature detection device used in food cooking came into being.

In the temperature detection device, the temperature probe as its temperature measuring element can measure the temperature, and the control unit can convert the temperature signal into a thermoelectromotive force signal to obtain the temperature detection result, thereby realizing the temperature detection.

As shown in FIG1 , FIG1 is a schematic diagram of the structure of an existing temperature probe 20. In order to reduce the response time of the temperature probe 20, a heat conductive material 23 is filled between the thermocouple 22 and the tube body 21 in the structure of the temperature probe 20. However, the working end 221 of the thermocouple 22 in the tube body 21 is still at a certain distance from the measured object, which will affect the response time of the temperature probe 20. Therefore, when making a fast-response handheld temperature probe, the response time of the temperature probe with this structure is relatively long, and it is difficult to meet the requirement of fast response of the temperature probe.

Summary of the invention

The present application provides a handheld temperature probe for cooking food, which can solve the problem of long response time of the temperature probe.

According to a first aspect, an embodiment provides a handheld temperature probe for cooking food, comprising:

A probe assembly, comprising: a tube body and a thermocouple; wherein:

The tube body has a containing cavity;

The thermocouple is at least partially disposed in the accommodating cavity, and the working end of the thermocouple is fixedly disposed on the tube body; at least part of the working end of the thermocouple is exposed from the tube body, or the working end of the thermocouple is in direct contact with the tube body for detecting temperature.

In one embodiment, it also includes:

A circuit assembly, the circuit assembly comprising an electrostatic protection unit and a control unit; wherein:

The electrostatic protection unit is connected between the working end and the control unit.

In one embodiment, it also includes:

A circuit assembly, the circuit assembly comprising an electrostatic protection unit and a control unit; wherein:

The electrostatic protection unit is electrically connected to the reference end of the thermocouple, and is used to absorb the electrostatic signal and transmit the signal detected by the thermocouple to the control unit;

The control unit is electrically connected to the electrostatic protection unit, and is used to obtain the signal detected by the thermocouple output by the electrostatic protection unit, and output a detection result corresponding to the signal detected by the thermocouple.

In one embodiment, the electrostatic protection unit includes: a transient diode ZD1 and a transient diode ZD2;

The cathode of the transient diode ZD1 is used to obtain the signal output by the first thermal conductive wire of the thermocouple, and the anode of the transient diode ZD1 is connected to the ground to absorb part of the electrostatic signal output by the first thermal conductive wire of the thermocouple;

The cathode of the transient diode ZD2 is used to obtain the signal output by the second thermal conductive wire of the thermocouple, and the anode of the transient diode ZD2 is connected to the ground to absorb part of the electrostatic signal output by the second thermal conductive wire of the thermocouple.

In one embodiment, the electrostatic signal includes: a common mode electrostatic signal and a differential mode electrostatic signal; and the electrostatic protection unit includes:

An electrostatic absorption circuit, used for acquiring two electrostatic signals output by the first thermal wire and the second thermal wire in the thermocouple, and conducting the differential mode electrostatic signal and the common mode electrostatic signal in the electrostatic signal to the ground, so as to absorb at least part of the electrostatic signal and output two remaining electrostatic signals;

A common-mode absorption circuit is connected to the electrostatic absorption circuit and is used to absorb the common-mode electrostatic signal in the two remaining electrostatic signals output by the electrostatic absorption circuit; wherein the signal amount of the common-mode electrostatic signal in the two remaining electrostatic signals is less than the signal amount of the common-mode electrostatic signal in the electrostatic signal absorbed by the electrostatic absorption circuit;

The differential mode absorption circuit is connected to the electrostatic absorption circuit and is used to absorb the differential mode electrostatic signal in the two remaining electrostatic signals output by the electrostatic absorption circuit.

In one embodiment, the electrostatic absorption circuit includes: a transient diode ZD1, a transient diode ZD2, an inductor L1 and an inductor L2;

The cathode of the transient diode ZD1 is used to obtain the signal output by the first thermal wire of the thermocouple, the anode of the transient diode ZD1 is connected to the ground, the cathode of the transient diode ZD2 is used to obtain the signal output by the second thermal wire of the thermocouple, the anode of the transient diode ZD2 is connected to the ground, one end of the inductor L1 is connected to the cathode of the transient diode ZD1, and the other end of the inductor L1 is used to output one of the two remaining electrostatic signals, one end of the inductor L2 is connected to the cathode of the transient diode ZD2, and the other end of the inductor L2 is used to output the other of the two remaining electrostatic signals.

In one embodiment, the common mode absorption circuit includes: a common mode capacitor CY1 and a common mode capacitor CY2;

One end of the common mode capacitor CY1 is used to obtain one of the two remaining electrostatic signals, the other end of the common mode capacitor CY1 is connected to the ground, and one end of the common mode capacitor CY2 is used to obtain the two remaining electrostatic signals. In another path of the partial electrostatic signal, the other end of the common mode capacitor CY2 is connected to the ground.

In one embodiment, the differential mode absorption circuit includes: a differential mode capacitor CX1;

One end of the differential mode capacitor CX1 is used to obtain one of the two remaining partial electrostatic signals, and the other end of the differential mode capacitor CX1 is used to obtain the other of the two remaining partial electrostatic signals.

In one embodiment, it further includes: a first thermally conductive material;

The first heat-conducting material is filled in the accommodating cavity, and the first heat-conducting material at least covers the connection between the working end of the thermocouple and the tube body.

In one embodiment, the first thermally conductive material is filled into the accommodating cavity by a centrifugal process.

In one embodiment, the accommodating cavity includes a first cavity extending backward from its front end, the thermocouple passes through the first cavity, the working end of the thermocouple is fixedly set on the cavity wall of the first cavity, the first heat conductive material is filled between the cavity wall of the first cavity and the thermocouple, and the radial gap a between the thermocouple and the cavity wall of the first cavity is less than 3mm.

In one embodiment, the accommodating cavity includes a first cavity extending backward from its front end, the thermocouple passes through the first cavity, the working end of the thermocouple is fixedly disposed on the cavity wall of the first cavity, and the inner diameter of the first cavity is not greater than 1.5 mm.

In one embodiment, the accommodating cavity includes a second cavity communicated with the first cavity, the thermocouple also passes through the second cavity, and a radial gap b≥a between the thermocouple and a cavity wall of the second cavity.

In one embodiment, the accommodating cavity includes a second cavity communicated with the first cavity, the thermocouple also passes through the second cavity, and the inner diameter of the second cavity is not greater than 3 mm.

In one embodiment, the first heat conductive material is also disposed on the cavity wall of the second cavity.

In one embodiment, the probe assembly further includes a second heat-conductive material, the second heat-conductive material is filled between the cavity wall of the second cavity and the thermocouple, and the second heat-conductive material is used to seal the first heat-conductive material.

According to a second aspect, an embodiment provides a handheld temperature probe for cooking food, comprising a probe assembly, wherein the probe assembly comprises:

A tube body, wherein the tube body has a receiving cavity;

a thermocouple, a portion of which is disposed in the accommodating cavity;

and a first heat-conducting material, wherein the first heat-conducting material is filled in the accommodating cavity and at least covers the working end of the thermocouple.

In one embodiment, the first thermally conductive material is filled into the accommodating cavity by a centrifugal process.

In one embodiment, the accommodating cavity includes a first cavity extending backward from its front end, the thermocouple passes through the first cavity, the working end of the thermocouple is fixedly arranged on the cavity wall of the first cavity, the first heat conductive material is filled between the cavity wall of the first cavity and the thermocouple, and the radial gap a between the thermocouple and the cavity wall of the first cavity is less than 3mm.

In one embodiment, the accommodating cavity includes a first cavity extending backward from its front end, the thermocouple passes through the first cavity, the working end of the thermocouple is fixedly disposed on the cavity wall of the first cavity, and the inner diameter of the first cavity is not greater than 1.5 mm.

In one embodiment, the accommodating cavity includes a second cavity communicated with the first cavity, the thermocouple also passes through the second cavity, and a radial gap b≥a between the thermocouple and a cavity wall of the second cavity.

In one embodiment, the accommodating cavity includes a second cavity communicated with the first cavity, the thermocouple also passes through the second cavity, and the inner diameter of the second cavity is not greater than 3 mm.

In one embodiment, the first heat conductive material is also disposed on the cavity wall of the second cavity.

In one embodiment, the probe assembly further includes a second heat-conductive material, the second heat-conductive material is filled between the cavity wall of the second cavity and the thermocouple, and the second heat-conductive material is used to seal the first heat-conductive material.

According to a third aspect, an embodiment provides a method for processing a handheld temperature probe for cooking food, comprising the following steps:

Fixing a portion of the thermocouple directly to the receiving cavity of the probe assembly;

A first heat-conducting material is filled into the accommodating cavity, and the first heat-conducting material at least covers the working end of the thermocouple.

In one embodiment, the first thermally conductive material is filled into the accommodating cavity by a centrifugal process.

According to the handheld temperature probe for cooking food according to the above embodiment, the probe assembly of the temperature probe includes a tube body and a thermocouple, the tube body has a accommodating cavity, the thermocouple is at least partially arranged in the accommodating cavity, the working end of the thermocouple is fixedly arranged on the tube body, at least part of the working end of the thermocouple is exposed from the tube body, or the working end of the thermocouple is in direct contact with the tube body to detect the temperature. Therefore, when the temperature probe is in use, the distance between the working end of the thermocouple and the object to be measured is significantly reduced compared to the distance between the working end of the existing thermocouple and the object to be measured that is at least the thickness of the tube body and the distance of the heat-conductive material, so that the response time of the temperature probe is shorter.

In one embodiment, the temperature probe also includes a circuit component, which includes an electrostatic protection unit and a control unit. The electrostatic protection unit is connected between the working end of the thermocouple and the control unit. Since the working end of the thermocouple is in direct contact with the tube body, the electrostatic signal generated on the tube body will be transmitted to the control unit through the thermocouple, thereby causing the circuit chip in the control unit to be damaged by the electrostatic signal. The present application can prevent the electrostatic signal generated on the tube body from being transmitted to the control unit through the thermocouple by connecting the electrostatic protection unit between the working end of the thermocouple and the control unit, so as to avoid the circuit chip in the control unit from being damaged by the electrostatic signal.

In one embodiment, the probe assembly of the temperature probe further includes a first heat-conducting material, which is filled in the accommodating cavity and covers at least the connection between the working end of the thermocouple and the tube body. Since the air heats up slowly, especially the air that is not easy to flow in the tube body is a poor conductor of heat, the first heat-conducting material covers the connection between the working end and the tube body, which can replace the air near the connection with a heat-conducting material with good thermal conductivity, thereby preventing the temperature from being too high. The air near the connection absorbs heat, which causes the temperature probe to reach the target temperature in response time to be longer, thereby further reducing the response time of the temperature probe. In addition, the first thermally conductive material is filled into the accommodating cavity by a centrifugal process. The method of using a centrifugal process to fill the first thermally conductive material has small requirements on the size of the gap between the tube body and the thermocouple. Even a very small gap can be filled with the first thermally conductive material by centrifugation. Therefore, the tube body can be designed to be thinner, which is more conducive to the miniaturization of the handheld temperature probe. Moreover, since the process of centrifugally filling the thermally conductive material is not affected by the gap between the tube body and the thermocouple, the operation process has little impact on the thermocouple. In addition, there are few or no air bubbles in the first thermally conductive material centrifuged out by the centrifugal process, and the surface is relatively smooth, which can make the thermal conductivity effect better.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of an existing temperature probe provided by the present application;

FIG2 is a block diagram of a temperature probe provided by the present application;

FIG3 is a schematic diagram of a structure of a probe assembly provided in the present application;

FIG4 is a cross-sectional schematic diagram of a first cavity provided by the present application;

FIG5 is a movement route diagram of the first heat conductive material in the probe assembly provided by the present application;

FIG6 is another schematic diagram of the structure of the probe assembly provided in the present application;

FIG7 is a flow chart of a method for processing a handheld temperature probe for cooking food provided by the present application;

FIG8 is another schematic diagram of the structure of the probe assembly provided by the present application;

FIG9 is a block diagram of another temperature probe provided by the present application;

FIG10 is a circuit diagram of an electrostatic protection unit provided in the present application;

FIG. 11 is another circuit diagram of the electrostatic protection unit provided in the present application.

Detailed ways

The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are for making the present application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different situations, or can be replaced by other elements, materials, methods. In some cases, some operations related to the present application are not shown or described in the specification, this is to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, they can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in order in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment, and do not mean that the composition and/or order are necessary.

The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application include direct and indirect connections (couplings) unless otherwise specified.

Embodiment 1:

In order to detect the temperature of food or food processing medium (such as water) during cooking and for ease of use, the present application provides a handheld temperature probe 10 for food cooking (hereinafter referred to as the temperature probe 10). As shown in FIG2 , FIG2 is a schematic diagram of the structure of a temperature probe 10 provided by the present application.

The temperature probe 10 includes a probe assembly 11 and a main body 12, and the probe assembly 11 is connected to the main body 12. The probe assembly 11 can be directly or indirectly connected to the main body 12, and the probe assembly 11 can be fixedly connected to the main body 12, such as by snapping, bonding, threading, etc. The probe assembly 11 can also be movably connected to the main body 12, such as by rotation, or the probe assembly 11 moves in a plane relative to the main body 12. The probe assembly 11 and the main body 12 can also be detachably connected, so that the probe assembly 11 can be directly replaced when the probe assembly 11 needs to be repaired or replaced. The connection method between the probe assembly 11 and the main body 12 can also be other connection methods that can be thought of by those skilled in the art, not limited to the above-mentioned connection method.

In one embodiment, the main body 12 includes a circuit assembly, and the circuit assembly includes at least a control unit. The control unit can be a circuit board with a control circuit, or other structures or circuits that can play a control role, or a combination of the two. The control unit can be used to control the opening and closing of the handheld temperature probe 10, and the control unit is also electrically connected to the probe assembly 11. The signal detected by the probe assembly 11 can be transmitted to the control unit, and the control unit processes the signal to obtain the result of temperature detection, so that the temperature probe 10 realizes temperature detection.

Please refer to FIG3 , which is a schematic diagram of the structure of a probe assembly 11 according to an embodiment of the present application. In one embodiment, the probe assembly 11 includes a tube 111 , a thermocouple 112 , and a first heat conductive material 113 .

The tube body 111 is a metal tube body with a housing cavity 1111, which is used to protect the thermocouple 112 from damage. The tube body 111 can be made of a metal with a high thermal conductivity, such as platinum, aluminum, copper, nickel, iron, stainless steel or other metals or alloys. In order to make the measured temperature more accurate, the wall thickness of the tube body 111 can be reduced, and a tube body 111 with a smaller inner diameter can be used to improve the hysteresis of the thermocouple 112. In the embodiment of FIG. 3, the wall thickness of the tube body 111 is 0.2 mm, and in other embodiments, it can also be other wall thicknesses.

The thermocouple 112 may include a first heat conducting wire 1121 and a second heat conducting wire 1122 whose two ends are connected to form a loop, and the thermocouple 112 has a working end 113a (hot end) and a reference end (cold end). When there is a temperature difference between the working end 113a and the reference end, a thermoelectric potential will be generated in the loop, and the reference end of the thermocouple 112 is electrically connected to the control power supply, so that the control unit can detect the temperature difference signal, and obtain the temperature detection result by processing the temperature difference signal.

In addition, the thermocouple 112 may further include a first insulating sleeve 1123 and a second insulating sleeve 1124 respectively sleeved on the first heat conducting wire 1121 and the second heat conducting wire 1122, and the working end 113a and the reference end of the thermocouple 112 are arranged outside the first insulating sleeve 1123 and the second insulating sleeve 1124. The insulating sleeve 1124 , the first insulating sleeve 1123 and the second insulating sleeve 1124 can prevent the first thermal wire 1121 and the second thermal wire 1122 from contacting each other, and can prevent the first thermal wire 1121 and the second thermal wire 1122 from being damaged, thereby increasing the service life of the thermocouple 112 .

A portion of the thermocouple 112 is disposed in the accommodating cavity 1111 , and a working end 113 a of the thermocouple 112 is fixedly disposed on the tube body 111 , with at least a portion of the working end 113 a exposed from the tube body 111 so that the working end 113 a can be used to detect temperature.

Specifically, the extension direction of the thermocouple 112 may be the same or substantially the same as the extension direction of the accommodating cavity 1111. The central axis of the thermocouple 112 may coincide with or substantially coincide with the central axis of the accommodating cavity 1111, or the central axis of the thermocouple 112 may be offset from the central axis of the accommodating cavity 1111.

In one embodiment, all parts of the thermocouple 112 except the working end 113a are disposed in the accommodating cavity 1111. Specifically, the first insulating sleeve 1123 and the second insulating sleeve 1124 of the thermocouple 112 are disposed in the accommodating cavity 111, a part of the first thermal wire 1121, a part of the second thermal wire 1122 and the reference end are disposed in the accommodating cavity 111, and the working end 113a is disposed on the tube body 111 so that at least part of the working end 113a is exposed from the tube body 111, and the reference end in the tube body 111 can be electrically connected to the control unit by providing a lead wire. In other embodiments, the way in which the thermocouple 112 is disposed in the accommodating cavity 1111 is not limited to the above-mentioned structure, and may also be other structures.

The working end 113a of the thermocouple 112 and the tube body 111 may be fixed by welding, bonding, etc. Preferably, the working end 113a and the tube body 111 are fixed by welding. Fixing the working end 113a and the tube body 111 by welding has better stability and is convenient to operate.

At least part of the working end 113a is exposed from the tube body 111, that is, a part of the working end 113a may be exposed from the tube body 111, and another part may be embedded in the tube wall of the tube body 111; or a first part of the working end 113a is exposed from the tube body 111, a second part is embedded in the tube wall of the tube body 111, and a third part is located in the accommodating cavity 1111; or the whole of the working end 113a is exposed from the tube body 111. The exposed may mean that at least part of the working end 113a is exposed from the tube body 111 and does not extend out of the tube body 111, or at least part of the working end 113a extends out of the tube body 111 and is exposed.

Since the working end 221 of the existing thermocouple 22 and the object to be measured (Figure 1) are at least as far away from the working end 221 of the thermocouple 22 as the thickness of the tube body 21 and the distance of the heat-conducting material 23, even if the tube body 21 and the heat-conducting material 23 are made of materials with high thermal conductivity, it is unavoidable that the temperature between the working end 221 and the object to be measured has a lag, resulting in a longer response time for the temperature probe 20.

When the temperature probe 10 provided in the present application is in use, the working end 113a of the thermocouple 112 exposed from the tube body 111 can directly contact the object to be measured. Compared with the existing structure in which the working end 113a is in indirect contact with the object to be measured, the response time of the temperature probe 10 is shorter, which effectively improves the problem of temperature detection lag of the temperature probe 10.

In some embodiments, since the thermocouple 22 is in direct contact with the tube body 111 , or even in direct contact with the object to be measured, the first heat conductive material 113 may not be disposed between the thermocouple 22 and the tube body 111 .

The first heat conductive material 113 is filled in the accommodating cavity 1111 and covers at least the connection between the working end 113a and the tube body 111. When the working end 113a and the tube body 111 are welded, the first heat conductive material 113 covers at least the welding point between the working end 113a and the tube body 111.

Since the air heats up slowly, especially the air that is not easy to flow in the tube body 111 is a poor conductor of heat, the first thermal conductive material 113 covering the connection between the working tube and the tube body 111 can replace the air near the connection with a thermal conductive material with good thermal conductivity, thereby preventing the air near the connection from absorbing heat and causing the temperature probe 10 to take a longer response time to reach the target temperature, thereby further reducing the response time of the temperature probe 10.

The first heat-conducting material 113 may be a material with a high thermal conductivity, such as thermal conductive silicone grease or copper powder. Preferably, the thermal conductivity of the first heat-conducting material 113 is greater than the thermal conductivity of the tube body 111, and may be selected to be more than 10 times. The greater the thermal conductivity of the first heat-conducting material 113 relative to the thermal conductivity of the tube body 111, the smaller the temperature difference between the inside and outside of the tube body 111, and the shorter the response time.

It should be noted that, taking the welding connection between the working end 113a of the thermocouple 112 and the tube body 111 as an example, when the probe assembly 11 is actually installed, the thermocouple 112 needs to be welded to the tube body 111 first, and then the first heat-conducting material 113 is filled in the accommodating cavity 1111, but it is not possible to first fill the first heat-conducting material 113 in the accommodating cavity 1111, and then weld the thermocouple 112 and the tube body 111. This is because if the first heat-conducting material 113 is pre-buried in the tube body, the first heat-conducting material 113 will cover the tube wall of the accommodating cavity 1111, and the thermocouple 112 needs to be inserted into the first heat-conducting material 113 before it can be contacted and welded with the tube body 111. When the thermocouple 112 and the tube body 111 are welded, the first heat-conducting material 113 remains on the surface of both, which will affect the effect of the welding process and cause the problem of welding failure.

After the thermocouple 112 is welded to the tube body, in some embodiments, the first heat conductive material 113 can be directly injected into the accommodating cavity 1111 through a syringe, but this method of filling the first heat conductive material 113 must ensure that the gap between the tube body 111 and the thermocouple 112 is larger than the outer diameter of the injection end of the syringe, and the larger the ratio of the gap distance between the tube body 111 and the thermocouple 112 to the outer diameter of the injection end, the better, so that there is a larger operating space for the injection end to insert into the gap to operate and inject the first heat conductive material 113. If the operating space of the syringe is too narrow, it is not conducive to the operation of the operator on the one hand, and may also cause damage to the thermocouple 112 on the other hand.

Increasing the ratio of the gap distance between the tube body 111 and the thermocouple 112 to the outer diameter of the syringe can be achieved by enlarging the diameter of the tube body 111 or using a syringe with a small diameter. However, if a syringe with a small diameter is used, it is difficult to squeeze the viscous thermal conductive material out of the syringe; if the tube body diameter is enlarged, the handheld temperature probe 10 cannot be designed to be more compact. At present, in order to make it more convenient to carry, use and store the handheld temperature probe 10, it is particularly important to make the handheld temperature probe 10 thinner and smaller.

In order to make the inner diameter of the tube body 111 thinner while being able to smoothly fill the first heat conductive material 113 in the presence of the thermocouple 112 , the present application provides the following technical solutions to solve the above problems.

In some embodiments, please refer to Figure 3, the accommodating cavity 1111 includes a first cavity 1112 extending backward from its front end (as shown in the left end of the figure). In the present application, the front end is close to the working end 113a of the thermocouple 112, and the rear end is close to the reference end of the thermocouple 112.

The thermocouple 112 is disposed through the first cavity 1112, and the working end 113a of the thermocouple 112 passes through the cavity wall of the first cavity 1112, and the working end 113a of the thermocouple 112 is fixedly disposed on the cavity wall of the first cavity 1112. In some embodiments, the inner diameter of the first cavity 1112 is not greater than 1.5 mm, for example, it can be 1.5 mm, 1.4 mm, 1 mm, 0.8 mm, 0.6 mm, 0.4 mm, 0.3 mm, etc. It should be noted that when the inner diameter of the first cavity 1112 is less than or equal to a certain value, the heat conductive material may not be filled, for example, when the inner diameter of the first cavity 1112 is less than or equal to 0.8 mm, for example, 0.8 mm, 0.6 mm, 0.4 mm, 0.3 mm, the heat conductive material may not be filled. In some embodiments, the radial gap a between the thermocouple 112 and the cavity wall of the first cavity 1112 is less than 3 mm, preferably, less than 2 mm, and in some embodiments, 0.1≤a≤1 mm, for example, it can be 0.2 mm, 0.375 mm, 0.7 mm, 1 mm, etc. That is, the position of the first cavity 1112 can be determined by the radial gap a<3 mm.

For example, in the embodiment of Figure 3, the radial clearance a of the accommodating cavity 1111 from its front end c to d satisfies the condition of a＜3mm, and the radial clearance a of the accommodating cavity 1111 from d to the rear does not satisfy the condition of a＜3mm, then the first cavity 1112 is the space from c to d of the accommodating cavity 1111.

Please refer to FIG. 4 , which shows a cross-sectional schematic diagram of an example of the first cavity 1112, wherein the thermocouple 112 (the first thermal wire 1121 and the second thermal wire 1122) are placed side by side in the first cavity 1112. In some embodiments, the outer diameter of the first cavity 1112 is 1.5 mm, and the thickness of the cavity wall 1112-1 of the first cavity 1112 is 0.2 mm. It can be seen that the inner diameter of the first cavity 1112 is 1.1 mm, and therefore, the inner diameter of the first cavity 1112 is not greater than 1.5 mm. In addition, the first thermal wire The inner diameter of the second heat-conducting wire 1121 and the second heat-conducting wire 1122 is 0.35 mm, so the radial gap between the thermocouple 112 and the cavity wall 1112-1 of the first cavity 1112 in the horizontal direction shown in FIG. 4 is 0.2 mm, and the radial gap between the thermocouple 112 and the cavity wall 1112-1 of the first cavity 1112 in the vertical direction shown in FIG. 4 is 0.375 mm. Therefore, the radial gap a between the thermocouple 112 and the cavity wall 1112-1 of the first cavity 1112 is satisfied <3 mm, and 0.1≤a≤1 mm is also satisfied. It can be understood that, under the premise that the radial gap a between the thermocouple 112 and the cavity wall 1112-1 of the first cavity 1112 is satisfied <3 mm and/or the inner diameter of the first cavity 1112 is not greater than 1.5 mm, the first cavity 1112 and the thermocouple 112 can also have other sizes.

By setting the radial gap a between the thermocouple 112 and the cavity wall of the first cavity 1112 within a certain range, the volume of the handheld temperature probe 10 is made smaller, which is conducive to the miniaturization of the handheld temperature probe 10.

It should be noted that the radial gap between the thermocouple 112 and the wall of the first cavity 1112 can be the radial gap between the outer wall of the first thermal wire 1121 or the second thermal wire 1122 and the wall of the first cavity 1112, or it can be the radial gap between the outer wall of the insulating sleeve 1123 outside the thermal wire and the wall of the first cavity 1112.

The shape of the first cavity 1112 can be a regular shape, such as a cylinder, a prism, etc.; the shape of the first cavity 1112 can also be an irregular shape. In one embodiment, as shown in FIG3, the first cavity 1112 includes a first cavity 1112a and a second cavity 1112b, the first cavity 1112a is located at the front end of the first cavity 1112, the second cavity 1112b is located at the rear end of the first cavity 1112, and the first cavity 1112a and the second cavity 1112b are connected. Among them, the shape of the second cavity 1112b is a column, such as a cylinder, a prism or other column; the shape of the first cavity 1112a is a cone or a hemisphere. In the embodiment of FIG3, the shape of the second cavity 1112b is a cylinder, The first cavity 1112a is in the shape of a cone.

The working end 113a of the thermocouple 112 can be passed through and fixedly arranged on the cavity wall at the vertex of the first cavity 1112a. For example, in the embodiment of FIG. 3, the thermocouple 112 passes through the first cavity 1112a and the second cavity 1112b, and the working end 113a of the thermocouple 112 is passed through and fixedly arranged on the cavity wall at the vertex of the first cavity 1112a of the cone. Of course, in some embodiments, the working end 113a of the thermocouple 112 can also be passed through and fixedly arranged on the side cavity wall of the first cavity 1112a, or the working end 113a of the thermocouple 112 can also be passed through and fixedly arranged on the side cavity wall of the second cavity 1112b.

In other embodiments, the shape of the first cavity 1112 may also be other shapes, not limited to the shapes mentioned above.

In one embodiment, as shown in FIG3 , in addition to the first cavity 1112, the accommodating cavity 1111 further includes a second cavity 1113, the first cavity 1112 is connected to the second cavity 1113, and the front end of the second cavity 1113 is connected to the rear end of the first cavity 1112. In some embodiments, the inner diameter of the second cavity 1113 is not greater than 3 mm, for example, it can be 3 mm, 2.5 mm, 2 mm, 1.5 mm, etc.

Thermocouple 112 also passes through the second cavity 1113, and the radial gap b ≥ a between the thermocouple 112 and the cavity wall of the second cavity 1113. In some embodiments, b ≥ 3 mm or b ≥ 2 mm, and the size of b can be determined according to the size of a, or according to the actual situation of the heat-conducting material. In the embodiment of FIG. 3, the second cavity 1113 is the space from d to the rear end of the accommodating cavity 1111. The radial gap between the thermocouple 112 and the cavity wall of the second cavity 1113 can be the radial gap between the outer wall of the first thermal wire 1121 or the second thermal wire 1122 and the cavity wall of the second cavity 1113, or it can be the radial gap between the outer wall of the insulating sleeve 1123 outside the thermal wire and the cavity wall of the second cavity 1113.

In one embodiment, the first heat-conducting material 113 can be filled in the first cavity 1112 of the accommodating cavity 1111 by a centrifugal process. Please refer to Figures 3 and 5. The direction of the arrow in Figure 5 indicates the movement direction of the first heat-conducting material 113 during the centrifugal process. After the thermocouple 112 and the first cavity 1112 are fixed, the first heat-conducting material 113 can be injected into the second cavity 1113 with a larger radial gap b through a syringe. Since the radial gap between the second cavity 1113 and the thermocouple 112 is large, a syringe with a larger diameter can be selected to inject the first heat-conducting material 113 into the second cavity 1113. The space that the syringe can operate is large, the operation difficulty is small, and the influence on the thermocouple 112 during the operation is small.

After the syringe injects the first heat-conducting material 113 into the second cavity 1113, the first heat-conducting material 113 in the second cavity 1113 is moved into the first cavity 1112 by centrifugal force through a centrifugal process, so that the first heat-conducting material 113 at least covers the connection between the working end 113a of the thermocouple 112 and the tube wall of the first cavity 1112.

In actual operation, before the tube body 111 is placed in a centrifuge for centrifugation, the first heat-conducting material 113 can be injected into the second cavity 1113 of the accommodating cavity 1111 using a syringe, and then the tube body 111 is placed in the centrifuge. After setting the speed, time or power of the centrifuge, the centrifuge is started for centrifugation. During the centrifugation process, the first heat-conducting material 113 moves from the second cavity 1113 to the first cavity 1112, so that the cavity wall of the first cavity 1112 and the thermocouple are in contact. The first thermal conductive material 113 is filled between 22.

The first heat-conducting material 113 is filled into the first cavity 1112 by a centrifugal process. The first heat-conducting material 1113 is filled into the first cavity 1112 by centrifugal force, and there is no need to insert a syringe into the first cavity 1112 for filling. Therefore, the first heat-conducting material 113 can be smoothly filled into the narrow-diameter first cavity 1112 when the thermocouple 112 is welded to the tube body; and the centrifugal process is used to fill the first heat-conducting material 113, which has a small requirement on the size of the gap between the first cavity 1112 and the thermocouple 112, and the inner diameter of the first cavity 1112 can be made thinner (satisfying the range of the radial gap a), which is conducive to the miniaturization of the handheld temperature probe 10.

In addition, the first thermally conductive material 113 filled by the existing syringe has more bubbles, and the injected surface is uneven, and its surface often has multiple depressions or protrusions. The first thermally conductive material 113 centrifuged by the centrifugal process has fewer or no bubbles. The first thermally conductive material 113 is centrifuged in the accommodating cavity 1111 to form an inner arc or horizontal surface, and the surface is relatively flat, so that the thermal conductivity effect is better.

In some embodiments, when the viscosity of the first thermally conductive material 113 is relatively large, for example, when the first thermally conductive material 113 is thermally conductive silicone grease, a portion of the first thermally conductive material 113 in the second cavity 1113 is centrifuged into the first cavity 1112, and another portion of the first thermally conductive material 113 in the second cavity 1113 remains on the cavity wall of the second cavity 1113.

In some embodiments, the accommodating cavity 1111 may only include the first cavity 1112. When the first heat-conducting material 113 is filled, a centrifugal auxiliary tube is connected behind the first cavity 1112. The shape and setting of the centrifugal auxiliary tube may refer to the setting of the second cavity 1113. The first heat-conducting material 113 may be injected into the centrifugal auxiliary tube using a syringe, and then the tube body is placed in a centrifuge. After setting the speed, time or power of the centrifuge, the first heat-conducting material 113 moves from the centrifugal auxiliary tube to the first cavity 1112. After centrifugation, the centrifugal auxiliary tube is removed from the first cavity 1112, and the first heat-conducting material 113 can be centrifuged into the accommodating cavity 1111. This method can also realize the filling of the first heat-conducting material 113 into the narrow-caliber first cavity 1112.

In some embodiments, a portion of the space between the cavity wall of the first cavity 1112 and the thermocouple 112 may be filled with the first heat conductive material 113 , or the entire space between the cavity wall of the first cavity 1112 and the thermocouple 112 may be filled with the first heat conductive material 113 .

Further, the first heat conductive material 113 can fill the gap between the cavity wall of the first cavity 1112 and the thermocouple 112. For example, in the embodiment of FIG. 3, the first heat conductive material 113 fills the gap between the cavity wall of the first cavity 1112a and the thermocouple 112, and the first heat conductive material 113 also fills the gap between the cavity wall of the second cavity 1112b and the thermocouple 112. In some embodiments, please refer to FIG. 6, which is another structural schematic diagram of the probe assembly 11 provided in the present application. The first heat conductive material 113 can only fill the gap between the cavity wall of the first cavity 1112a and the thermocouple 112. In some embodiments, the first heat conductive material 113 can fill the gap between the cavity wall of the first cavity 1112a and the thermocouple 112, and the first heat conductive material 113 can also fill a portion of the gap between the cavity wall of the second cavity 1112b and the thermocouple 112. In some embodiments, the first heat conductive material 113 at least covers the connection between the working end 113 a of the thermocouple 112 and the tube wall of the first cavity 1112 .

Based on the above, please refer to FIG. 7, the present application embodiment also provides a handheld warmer for cooking food. The method for processing a degree probe includes steps S10 and S20.

Step S10: directly fix a portion of the thermocouple 112 to the accommodating cavity 1111 of the probe assembly.

Step S20: Fill the first heat-conducting material 113 into the accommodating cavity 1111, and the first heat-conducting material 113 at least covers the working end 113a of the thermocouple 112. In some embodiments, the first heat-conducting material 113 is filled into the accommodating cavity 1111 by a centrifugal process.

The specific implementation methods of the above method steps have been described in detail above and will not be repeated here.

In some embodiments, please refer to FIG8, which is a schematic diagram of the structure of a probe assembly 11 of another embodiment of the present application. The probe assembly 11 also includes a second thermally conductive material 114, which is filled in the gap between the cavity wall of the second cavity 1113 and the thermocouple 112, and the second thermally conductive material 114 is used to seal the first thermally conductive material 113. The second thermally conductive material 114 can fill the gap between the cavity wall of the second cavity 1113 and the thermocouple 112; in order to save costs, the second thermally conductive material 114 can also only fill the gap at the entrance where the second cavity 1113 is connected to the first cavity 1112, as long as the first thermally conductive material 113 can be sealed. In the embodiment of FIG8, the first thermally conductive material 113 is copper powder, and the second thermally conductive material 114 is thermally conductive silicone grease. Among them, the copper powder can be filled into the first cavity 1112 by oscillation, and the thermally conductive silicone grease can be filled into the second cavity 1113 by centrifugation or injection by syringe.

By providing the second heat conductive material 114 , the second heat conductive material 114 can also replace the air in the second cavity 1113 , thereby shortening the response time of the temperature probe 10 . Furthermore, the second heat conductive material 114 can seal the first heat conductive material 113 in the first cavity 1112 .

In some embodiments, the probe assembly 11 may further include a sealing member, which is disposed in the second cavity 1113 and is used to seal the first heat-conducting material 113, that is, in this embodiment, the sealing member may replace the second heat-conducting material 114 to seal the first heat-conducting material 113. Specifically, the sealing member may be sleeved on the insulating sleeve 1123 of the thermocouple 112 and disposed at the entrance where the second cavity 1113 is connected to the first cavity 1112.

The present application also provides a handheld temperature probe 10 for cooking food, and the handheld temperature probe 10 includes a probe assembly 11. The probe assembly 11 includes a tube body 111, a thermocouple 112, and a first heat conductive material 113.

The tube body 111 has a receiving cavity 1111, and a part of the thermocouple 112 is disposed in the receiving cavity 1111. Specifically, at least the working end 113a of the thermocouple 112 is disposed in the receiving cavity. The thermocouple 112 may be fixed to the cavity wall of the receiving cavity 1111 (described above), or may not be fixed to the cavity wall of the receiving cavity 1111. The following description is a solution in which the thermocouple 112 is not fixed to the cavity wall of the receiving cavity 1111.

The first heat conductive material 113 is filled into the accommodating cavity 1111 by a centrifugal process, and the first heat conductive material 113 at least covers the working end 113 a of the thermocouple 112 .

In order to realize a more miniaturized temperature probe 10, the diameter of some temperature probe tubes 111 is narrower, and even if the thermocouple 112 is not placed in the tube 111, the diameter of the tube 111 is smaller than the outer diameter of the injection end of the syringe. In this case, it is difficult for the syringe to inject the viscous heat-conducting material from the syringe into the tube 111 due to the diameter of the tube 111 and the outer diameter of the syringe.

In the present application, the first heat-conducting material 113 is filled into the accommodating cavity 1111 by using a centrifugal process. On the one hand, the first heat-conducting material 113 is not limited by the diameter of the tube body 111 and the outer diameter of the injection end of the syringe, and can be directly moved into the accommodating cavity 1111 by centrifugal force, thereby solving the problem that the miniaturized temperature probe 10 is difficult to be filled with the heat-conducting material. On the other hand, the first heat-conducting material 113 filled with the syringe has many bubbles and an uneven surface with many depressions or protrusions. The first heat-conducting material 113 centrifuged out by the centrifugal process has few or no bubbles. The first heat-conducting material 113 is centrifuged in the accommodating cavity 1111 to form an inner arc-shaped or horizontal surface, which has a relatively flat surface and a better heat-conducting effect.

It should be noted that in the solution where the thermocouple 112 is not fixed on the cavity wall of the accommodating cavity 1111, the first thermally conductive material 113 can be first filled into the accommodating cavity 1111 through a centrifugal process, and then the thermocouple 112 can be inserted into the accommodating cavity filled with the first thermally conductive material 113; or the thermocouple 112 can be first inserted into the accommodating cavity 1111, and then the first thermally conductive material 113 can be filled into the accommodating cavity 1111 using a centrifugal process.

Similar to the solution in which the thermocouple 112 is fixed to the accommodating cavity 1111 in the above text, in order to facilitate the use of a centrifugal process to fill the first heat-conducting material 113 into the accommodating cavity 1111 when the thermocouple 112 is inserted into the accommodating cavity 1111, in some embodiments, the accommodating cavity 1111 includes a first cavity 1112 extending backward from the front end, and the working end 113a of the thermocouple 112 is arranged in the first cavity 1112. The inner diameter of the first cavity 1112 is not greater than 1mm, for example, it can be 1mm, 0.8mm, 0.6mm, 0.4mm, 0.3mm, etc. It should be noted that when the inner diameter of the first cavity 1112 is less than 0.04mm, no heat-conducting material may be filled. The radial gap a between the thermocouple 112 and the cavity wall of the first cavity 1112 is <3mm, preferably, a <2mm, in some embodiments, 0.1≤a≤1mm, for example, it can be 0.2mm, 0.375mm, 0.7mm, 1mm, etc. By setting the radial gap a between the thermocouple 112 and the cavity wall of the first cavity 1112 within a certain range, the volume of the handheld temperature probe 10 is made smaller, which is conducive to the miniaturization of the handheld temperature probe 10.

Further, in one embodiment, in addition to the first cavity 1112, the accommodating cavity 1111 also includes a second cavity 1113, the first cavity 1112 is connected to the second cavity 1113, and the front end of the second cavity 1113 is connected to the rear end of the first cavity 1112. The inner diameter of the second cavity 1113 is not greater than 3mm, for example, it can be 3mm, 2.5mm, 2mm, 1.5mm, etc. The thermocouple 112 also passes through the second cavity 1113, and the radial gap b≥a between the thermocouple 112 and the cavity wall of the second cavity 1113 is b≥3mm or b≥2mm. The size of b can be determined according to the size of a, or according to the actual situation of the heat conductive material. The definition, shape and feasible embodiments of the first cavity 1112 and the second cavity 1113 can refer to the description above and will not be repeated here.

In the scheme where the accommodating cavity 1111 has a second cavity 1113, since the diameter of the second cavity 1113 is relatively large, the first heat-conducting material 113 can be injected into the second cavity 1113 using a syringe, and then the first heat-conducting material 113 in the second cavity 1113 can be moved to the first cavity 1112 by centrifugal force through a centrifugal process, so that the first heat-conducting material 113 at least covers the working end 113a of the thermocouple 112. By filling the first heat-conducting material 1113 in this way, the temperature probe 10 can be miniaturized, and the first heat-conducting material 1113 can be moved from the wide-caliber cavity 1113 to the first cavity 1112. The second cavity 1113 is centrifuged into the narrow-bore first cavity 1112 , effectively reducing the response time of the temperature probe 10 .

In some embodiments, when the viscosity of the first thermally conductive material 113 is relatively large, for example, when the first thermally conductive material 113 is thermally conductive silicone grease, a portion of the first thermally conductive material 113 in the second cavity 1113 is centrifuged into the first cavity 1112, and another portion of the first thermally conductive material 113 in the second cavity 1113 remains on the cavity wall of the second cavity 1113.

Embodiment 2:

The present application provides a handheld temperature probe for cooking food. Please refer to FIG. 9 . The temperature probe 10 includes a probe assembly 11 and a main body (not shown in the figure), and the main body includes a circuit assembly 121 .

The probe assembly 11 will be described in detail below.

In one embodiment, the probe assembly 11 includes a tube body 111 , a thermocouple 112 , and a first heat conductive material 113 .

Among them, the tube body 111 is a metal tube body with a accommodating cavity 1111, a part of the thermocouple 112 is arranged in the accommodating cavity 1111, the working end 112a of the thermocouple 112 is fixedly arranged on the tube body 111, and the working end 112a of the thermocouple 112 is in direct contact with the tube body 1111 for detecting temperature.

In one embodiment, the entire structure of the thermocouple 112 is disposed in the accommodating cavity 1111 of the tube body 111, and the accommodating cavity 1111 includes a first cavity 1112 (as shown in the left end in the figure) extending backward from its front end. In the present application, the front end is an end close to the working end 112a of the thermocouple 112, and the rear end is an end close to the reference end of the thermocouple 112. Specifically, the first thermal conductive wire and the second thermal conductive wire in the thermocouple 112 are bent so that the working end 112a of the thermocouple 112 is in direct contact with the cavity wall of the first cavity 1112, and the reference end of the thermocouple 112 can be connected to the circuit component 121 in the main body through a lead wire. In other embodiments, the manner in which the thermocouple 112 is disposed in the accommodating cavity 1111 is not limited to the above-mentioned structure, and can also be other structures.

The working end 112a of the thermocouple 112 and the tube body 111 may be fixed by welding, bonding, etc. Preferably, the working end 112a and the tube body 111 are fixed by welding. Fixing the working end 112a and the tube body 111 by welding has better stability and is convenient to operate.

Since the working end 221 of the existing thermocouple 22 and the object to be measured (Figure 1) are at least as far away from the working end 221 of the thermocouple 22 as the thickness of the tube body 21 and the distance of the heat-conducting material 23, even if the tube body 21 and the heat-conducting material 23 are made of materials with high thermal conductivity, it is unavoidable that the temperature between the working end 221 and the object to be measured has a lag, resulting in a long temperature measurement delay in the temperature probe 20.

When the temperature probe 10 provided in the present application is in use, the working end 112a of the thermocouple 112 is in direct contact with the tube body 111. Compared with the existing thermocouple 22 in which the distance between the working end of the thermocouple and the object to be measured is at least the thickness of the tube body 11 and the distance of the heat-conducting material 23, the distance between the working end of the thermocouple and the object to be measured is significantly reduced, and the problem of temperature lag in detection of the temperature probe 10 is effectively improved.

It should be noted that, except for the above-mentioned structure, other structures of the probe assembly 11 provided in this embodiment are the same as those in the first embodiment, and will not be described again here.

Based on the probe assembly 11 provided in the above embodiment, the circuit assembly 121 on the main body is described in detail below.

In one embodiment, the circuit assembly 121 includes an electrostatic protection unit 1211 , a control unit 1212 , and a temperature detection unit 1213 . The electrostatic protection unit 1211 is electrically connected between the working end 112 a of the thermocouple 112 and the control unit 1212 .

In one embodiment, the electrostatic protection unit 1211 is electrically connected to the reference end of the thermocouple 112, and is used to absorb the electrostatic signal and transmit the signal detected by the thermocouple 112 to the control unit 1212. As mentioned above, the tube body 111 is made of metal material, and static electricity is easily generated on the surface of the tube body 111. For example, when the user's hand touches the tube body 111, the static electricity of the user's body will be transmitted to the tube body 111, so that static electricity is generated on the surface of the tube body 111. The working end 112a of the thermocouple 112 is in direct contact with the tube body 111. The electrostatic signal on the tube body 111 can be transmitted to the circuit component 121 through the first thermal wire and the second thermal wire in the thermocouple 112. Therefore, the electrostatic protection unit 1211 can obtain the signal detected by the thermocouple 112, and can also obtain the electrostatic signal. It should be noted that the signal detected by the thermocouple 112 and the electrostatic signal can be generated simultaneously or separately. For example, when the temperature probe 10 is not in working condition, an electrostatic signal may be generated when the user holds the temperature probe 10. For another example, when the temperature probe 10 is in working condition, a signal detected by the thermocouple 112 will be generated, and at the same time, an electrostatic signal may be generated when the user holds the temperature probe 10. In this case, the signal detected by the thermocouple 112 and the electrostatic signal are generated simultaneously.

In one embodiment, the control unit 1212 is electrically connected to the electrostatic protection unit 1211. The control unit 1212 is used to obtain the signal detected by the thermocouple 112 output by the electrostatic protection unit 1211, and output the detection result corresponding to the signal detected by the thermocouple 112, so that the temperature probe 10 realizes temperature detection.

In some embodiments, the circuit assembly 121 further includes a temperature detection unit 1213, which is electrically connected to the control unit 1212. The temperature detection unit 1213 is used to detect the temperature of the main body where the circuit assembly 121 is located, that is, to obtain a circuit assembly temperature signal, and output the circuit assembly temperature signal to the control unit 1212. In one embodiment, the temperature detection unit 1213 can be a thermistor (NTC), or an existing temperature detection device such as an existing temperature sensor. Since the temperature corresponding to the signal detected by the thermocouple 112 is not the actual temperature of the object to be measured, it is the superposition of the actual temperature of the object to be measured and the temperature on the main body, so the temperature detection unit 1213 is required to detect the temperature on the main body, and the temperature corresponding to the signal detected by the thermocouple 112 minus the temperature on the main body can be obtained to obtain the actual temperature of the object to be measured, so that the corresponding detection result output by the control unit 1212 based on the signal detected by the thermocouple and the circuit assembly temperature signal is the actual temperature of the object to be measured. In one embodiment, the control unit 1212 can output the detection result to the display screen on the main body for display, and can also prompt the user of the detection result through voice or other means.

Please refer to FIG. 10. In one embodiment, the electrostatic protection unit 1211 may include a transient diode ZD1 and a transient diode ZD2. The cathode of the transient diode ZD1 is used to obtain the signal output by the first thermal wire of the thermocouple 112. The anode of the transient diode ZD1 is connected to the ground. The transient diode ZD1 can discharge the electrostatic signal on the first thermal wire to the ground to absorb part of the electrostatic signal output by the first thermal wire of the thermocouple 112. The cathode of the transient diode ZD2 is used to obtain the signal output by the second thermal wire of the thermocouple 112. The anode of the transient diode ZD2 is connected to the ground. The transient diode ZD2 can discharge the electrostatic signal on the second thermal wire to the ground. The transient diode ZD1 and the transient diode ZD2 can absorb most of the static signals, thereby greatly reducing the static signals entering the control unit 1212 and preventing the static signals from damaging the circuit chips in the control unit 1212.

Electrostatic signals may include common-mode electrostatic signals and differential-mode electrostatic signals. In the circuit structure of the electrostatic protection unit 1211 shown in FIG. 4 above, the electrostatic protection unit 1211 can absorb almost all common-mode electrostatic signals and some differential-mode electrostatic signals. Therefore, there will still be some differential-mode electrostatic signals and very few common-mode electrostatic signals entering the control unit.

Regarding the above problem, please refer to FIG. 11 . In one embodiment, the electrostatic protection unit 1211 may include an electrostatic absorption circuit 1211 - a , a common mode absorption circuit 1211 - b , and a differential mode absorption circuit 1211 - c .

Among them, the electrostatic absorption circuit 1211-a is used to obtain two electrostatic signals output by the first thermal wire and the second thermal wire, and conduct the differential mode electrostatic signal and the common mode electrostatic signal in the electrostatic signal to the ground to absorb at least part of the electrostatic signal and output two remaining electrostatic signals.

The common-mode absorption circuit 1211-b is connected to the electrostatic absorption circuit 1211-a, and the common-mode absorption circuit 1211-b is used to absorb the common-mode electrostatic signal in the two remaining electrostatic signals output by the electrostatic absorption circuit 1211-a; wherein the signal amount of the common-mode electrostatic signal in the two remaining electrostatic signals is smaller than the signal amount of the common-mode electrostatic signal in the electrostatic signal absorbed by the electrostatic absorption circuit 1211-a.

The differential mode absorption circuit 1211 - c is connected to the electrostatic absorption circuit 1211 - a, and the differential mode absorption circuit 1211 - c is used to absorb the differential mode electrostatic signal in the two remaining electrostatic signals output by the electrostatic absorption circuit 1211 - a.

The above electrostatic absorption circuit 1211-a can absorb most of the common-mode electrostatic signals and a small part of the differential-mode electrostatic signals, the common-mode absorption circuit 1211-b can absorb the remaining common-mode electrostatic signals, and the differential-mode absorption circuit 1211-c can absorb the remaining differential-mode electrostatic signals.

In one embodiment, the electrostatic absorption circuit 1211-a may include: a transient diode ZD1, a transient diode ZD2, an inductor L1, and an inductor L2. The cathode of the transient diode ZD1 is used to obtain the signal output by the first thermal wire of the thermocouple 112, the anode of the transient diode ZD1 is connected to the ground, and the transient diode ZD1 can discharge the electrostatic signal on the first thermal wire to the ground, so as to absorb at least part of the electrostatic signal output by the first thermal wire of the thermocouple 112. The cathode of the transient diode ZD2 is used to obtain the signal output by the second thermal wire of the thermocouple 112, the anode of the transient diode ZD2 is connected to the ground, and the transient diode ZD2 can discharge the electrostatic signal on the second thermal wire to the ground, so as to absorb at least part of the electrostatic signal output by the second thermal wire of the thermocouple 112. One end of the inductor L1 is connected to the cathode of the transient diode ZD1, and the other end of the inductor L1 is used to output one of the two remaining electrostatic signals. One end of the inductor L2 is connected to the cathode of the transient diode ZD2, and the other end of the inductor L2 is used to output the other of the two remaining electrostatic signals. The above-mentioned electrostatic absorption circuit 1211-a can absorb almost all common-mode electrostatic signals and part of differential-mode electrostatic signals, that is, the electrostatic absorption circuit 1211-a can absorb most of the electrostatic signals, and the inductors L1 and L2 can prevent the electrostatic signals from entering the control unit 1212, so that the electrostatic signals can be absorbed more by the transient diodes ZD1 and ZD2. In one embodiment, the inductor L1 and the inductor L2 may be implemented as chip beads. In other embodiments, the electrostatic absorption circuit 1211-a may also be implemented by other circuits capable of absorbing electrostatic signals. For example, the electrostatic absorption circuit 1211-a may also include only transient diodes ZD1 and ZD2, which may also absorb part of the electrostatic signals.

In one embodiment, the common-mode absorption circuit 1211-b may include: a common-mode capacitor CY1 and a common-mode capacitor CY2; wherein one end of the common-mode capacitor CY1 is used to obtain one of the two remaining electrostatic signals output by the electrostatic absorption circuit 1211-a, and the other end of the common-mode capacitor CY1 is connected to the ground; one end of the common-mode capacitor CY2 is used to obtain the other of the two remaining electrostatic signals output by the electrostatic absorption circuit 1211-a, and the other end of the common-mode capacitor CY2 is connected to the ground. In the above common-mode absorption circuit 1211-b, the common-mode electrostatic signal in the two remaining electrostatic signals output by the electrostatic absorption circuit 1211-a can be absorbed by the common-mode capacitor CY1 and the common-mode capacitor CY2, respectively, to prevent the common-mode electrostatic signal from entering the control unit 1212.

In one embodiment, the differential mode absorption circuit 1211-c may include: a differential mode capacitor CX1; wherein one end of the differential mode capacitor CX1 is used to obtain one of the two remaining partial electrostatic signals output by the electrostatic absorption circuit 1211-a, and the other end of the differential mode capacitor CX1 is used to obtain the other of the two remaining partial electrostatic signals output by the electrostatic absorption circuit 1211-a. In the above differential mode absorption circuit 1211-c, the differential mode electrostatic signal in the two remaining partial electrostatic signals output by the electrostatic absorption circuit 1211-a can be absorbed by the differential mode capacitor CX1 to prevent the differential mode electrostatic signal from entering the control unit 1212.

The above is an embodiment of absorbing the electrostatic signal when the electrostatic protection unit 1211 obtains the electrostatic signal. In addition, it should be noted that when the signal obtained by the electrostatic protection unit 1211 is a signal detected by the thermocouple 112, the electrostatic protection unit 1211 directly transmits the signal detected by the thermocouple 112 to the control unit 1212 to obtain the detection result corresponding to the signal detected by the thermocouple 112.

It should be noted that the electrostatic protection unit 1211 provided in the present application is not limited to the two circuit structures described above. Those skilled in the art can understand that the electrostatic protection unit 1211 can also realize its function through other circuit results. For example, the electrostatic protection unit 1211 may only include the electrostatic absorption circuit 1211-a and the common-mode absorption circuit 1211-b, or may only include the electrostatic absorption circuit 1211-a and the differential-mode absorption circuit 1211-c.

The above specific examples are used to illustrate the present invention, which are only used to help understand the present invention and are not intended to limit the present invention. For those skilled in the art of the present invention, some simple deductions, deformations or substitutions can be made based on the idea of the present invention.

Claims (26)

A handheld temperature probe for cooking food, characterized by comprising: A probe assembly, comprising: a tube body and a thermocouple; wherein: The tube body has a containing cavity; The thermocouple is at least partially disposed in the accommodating cavity, and the working end of the thermocouple is fixedly disposed on the tube body; at least part of the working end of the thermocouple is exposed from the tube body, or the working end of the thermocouple is in direct contact with the tube body for detecting temperature. The handheld temperature probe for cooking food according to claim 1, further comprising: A circuit assembly, the circuit assembly comprising an electrostatic protection unit and a control unit; wherein: The electrostatic protection unit is connected between the working end and the control unit. The handheld temperature probe for cooking food according to claim 1, further comprising: A circuit assembly, the circuit assembly comprising an electrostatic protection unit and a control unit; wherein: The electrostatic protection unit is electrically connected to the reference end of the thermocouple, and is used to absorb the electrostatic signal and transmit the signal detected by the thermocouple to the control unit; The control unit is electrically connected to the electrostatic protection unit, and is used to obtain the signal detected by the thermocouple output by the electrostatic protection unit, and output a detection result corresponding to the signal detected by the thermocouple. The handheld temperature probe for cooking food according to claim 2 or 3, characterized in that the electrostatic protection unit comprises: a transient diode ZD1 and a transient diode ZD2; The cathode of the transient diode ZD1 is used to obtain the signal output by the first thermal conductive wire of the thermocouple, and the anode of the transient diode ZD1 is connected to the ground to absorb part of the electrostatic signal output by the first thermal conductive wire of the thermocouple; The cathode of the transient diode ZD2 is used to obtain the signal output by the second thermal conductive wire of the thermocouple, and the anode of the transient diode ZD2 is connected to the ground to absorb part of the electrostatic signal output by the second thermal conductive wire of the thermocouple. The handheld temperature probe for cooking food according to claim 2 or 3, characterized in that the electrostatic signal comprises: a common mode electrostatic signal and a differential mode electrostatic signal; and the electrostatic protection unit comprises: An electrostatic absorption circuit, used for acquiring two electrostatic signals output by the first thermal wire and the second thermal wire in the thermocouple, and conducting the differential mode electrostatic signal and the common mode electrostatic signal in the electrostatic signal to the ground, so as to absorb at least part of the electrostatic signal and output two remaining electrostatic signals; A common-mode absorption circuit is connected to the electrostatic absorption circuit and is used to absorb the common-mode electrostatic signal in the two remaining electrostatic signals output by the electrostatic absorption circuit; wherein the signal amount of the common-mode electrostatic signal in the two remaining electrostatic signals is less than the signal amount of the common-mode electrostatic signal in the electrostatic signal absorbed by the electrostatic absorption circuit; A differential mode absorption circuit is connected to the electrostatic absorption circuit and is used to absorb the two outputs of the electrostatic absorption circuit. The differential mode electrostatic signal in the remaining part of the electrostatic signal is absorbed. The handheld temperature probe for cooking food as claimed in claim 5, characterized in that the electrostatic absorption circuit comprises: a transient diode ZD1, a transient diode ZD2, an inductor L1 and an inductor L2; The cathode of the transient diode ZD1 is used to obtain the signal output by the first thermal wire of the thermocouple, the anode of the transient diode ZD1 is connected to the ground, the cathode of the transient diode ZD2 is used to obtain the signal output by the second thermal wire of the thermocouple, the anode of the transient diode ZD2 is connected to the ground, one end of the inductor L1 is connected to the cathode of the transient diode ZD1, and the other end of the inductor L1 is used to output one of the two remaining electrostatic signals, one end of the inductor L2 is connected to the cathode of the transient diode ZD2, and the other end of the inductor L2 is used to output the other of the two remaining electrostatic signals. The handheld temperature probe for cooking food as claimed in claim 5, characterized in that the common mode absorption circuit comprises: a common mode capacitor CY1 and a common mode capacitor CY2; One end of the common-mode capacitor CY1 is used to obtain one of the two remaining electrostatic signals, and the other end of the common-mode capacitor CY1 is connected to the ground. One end of the common-mode capacitor CY2 is used to obtain the other of the two remaining electrostatic signals, and the other end of the common-mode capacitor CY2 is connected to the ground. The handheld temperature probe for cooking food as claimed in claim 5, characterized in that the differential mode absorption circuit comprises: a differential mode capacitor CX1; One end of the differential mode capacitor CX1 is used to obtain one of the two remaining partial electrostatic signals, and the other end of the differential mode capacitor CX1 is used to obtain the other of the two remaining partial electrostatic signals. The handheld temperature probe for cooking food as claimed in claim 1, further comprising: a first heat conductive material; The first heat-conducting material is filled in the accommodating cavity, and the first heat-conducting material at least covers the connection between the working end of the thermocouple and the tube body. The handheld temperature probe for cooking food as described in claim 9 is characterized in that the first thermally conductive material is filled in the accommodating cavity by a centrifugal process. The handheld temperature probe for cooking food as described in claim 9 or 10 is characterized in that the accommodating cavity includes a first cavity extending backward from its front end, the thermocouple passes through the first cavity, the working end of the thermocouple is fixedly arranged on the cavity wall of the first cavity, the first heat-conductive material is filled between the cavity wall of the first cavity and the thermocouple, and the radial gap a between the thermocouple and the cavity wall of the first cavity is less than 3 mm. The handheld temperature probe for cooking food as described in claim 1 or 10 is characterized in that the accommodating cavity includes a first cavity extending backward from its front end, the thermocouple passes through the first cavity, the working end of the thermocouple is fixedly arranged on the cavity wall of the first cavity, and the inner diameter of the first cavity is not greater than 1.5 mm. The handheld temperature probe for cooking food according to claim 11 or 12, characterized in that the accommodating cavity includes a second cavity connected to the first cavity, and the thermocouple also passes through the second cavity. And the radial gap b between the thermocouple and the cavity wall of the second cavity is greater than or equal to a. The handheld temperature probe for cooking food as described in claim 11 or 12 is characterized in that the accommodating cavity includes a second cavity connected to the first cavity, the thermocouple also passes through the second cavity, and the inner diameter of the second cavity is not greater than 3 mm. The handheld temperature probe for cooking food as described in claim 13 or 14 is characterized in that the first heat conductive material is also provided on the cavity wall of the second cavity. The handheld temperature probe for cooking food as described in claim 13 or 14 is characterized in that the probe assembly also includes a second heat-conductive material, the second heat-conductive material is filled between the cavity wall of the second cavity and the thermocouple, and the second heat-conductive material is used to seal the first heat-conductive material. A handheld temperature probe for cooking food, characterized in that it comprises a probe assembly, wherein the probe assembly comprises: A tube body, wherein the tube body has a receiving cavity; a thermocouple, a portion of which is disposed in the accommodating cavity; and a first heat-conducting material, wherein the first heat-conducting material is filled in the accommodating cavity and at least covers the working end of the thermocouple. The handheld temperature probe for cooking food as described in claim 17 is characterized in that the first thermally conductive material is filled in the accommodating cavity through a centrifugal process. The handheld temperature probe for cooking food as described in claim 17 or 18 is characterized in that the accommodating cavity includes a first cavity extending backward from its front end, the thermocouple passes through the first cavity, the working end of the thermocouple is fixedly arranged on the cavity wall of the first cavity, the first heat-conductive material is filled between the cavity wall of the first cavity and the thermocouple, and the radial gap a between the thermocouple and the cavity wall of the first cavity is less than 3 mm. The handheld temperature probe for cooking food as described in claim 17 or 18 is characterized in that the accommodating cavity includes a first cavity extending backward from its front end, the thermocouple passes through the first cavity, the working end of the thermocouple is fixedly arranged on the cavity wall of the first cavity, and the inner diameter of the first cavity is not greater than 1.5 mm. The handheld temperature probe for cooking food as described in claim 19 or 20 is characterized in that the accommodating cavity includes a second cavity connected to the first cavity, the thermocouple also passes through the second cavity, and the radial gap b ≥ a between the thermocouple and the cavity wall of the second cavity. The handheld temperature probe for cooking food as described in claim 19 or 20 is characterized in that the accommodating cavity includes a second cavity connected to the first cavity, the thermocouple also passes through the second cavity, and the inner diameter of the second cavity is not greater than 3 mm. The handheld temperature probe for cooking food as described in claim 21 or 22 is characterized in that the first heat conductive material is also provided on the cavity wall of the second cavity. The handheld temperature probe for cooking food as described in claim 21 or 22 is characterized in that the probe assembly also includes a second heat-conductive material, the second heat-conductive material is filled between the cavity wall of the second cavity and the thermocouple, and the second heat-conductive material is used to seal the first heat-conductive material. A method for processing a handheld temperature probe for cooking food, characterized by comprising the following steps: Fixing a portion of the thermocouple directly to the receiving cavity of the probe assembly; A first heat-conducting material is filled into the accommodating cavity, and the first heat-conducting material at least covers the working end of the thermocouple. The method according to claim 25 is characterized in that the first thermally conductive material is filled into the accommodating cavity by a centrifugal process.