CN209945571U

CN209945571U - Wireless high-temperature probe for baking, steaming and roasting

Info

Publication number: CN209945571U
Application number: CN201920793061.6U
Authority: CN
Inventors: 张丰; 魏标华; 张润晨; 张凌宇; 唐辉; 彭泽强; 崔涛
Original assignee: Shenzhen Flamingo Technology Co Ltd
Current assignee: Shenzhen Flamingo Technology Co Ltd
Priority date: 2019-05-29
Filing date: 2019-05-29
Publication date: 2020-01-14
Anticipated expiration: 2029-05-29

Abstract

A wireless high-temperature probe for baking, steaming and baking comprises a shell and a PCBA (printed Circuit Board Assembly), wherein a signal processing unit and at least one food temperature sensor are arranged on the PCBA, the probe also comprises an NTC (negative temperature coefficient) component, the NTC component is electrically connected with the signal processing unit, the shell is of a hollow tubular structure, the NTC component is arranged at the upper part in the shell, and the PCBA is arranged at the lower half section in the shell; be provided with farad electric capacity in the casing, farad electric capacity is connected and supplies power to PCBA with PCBA electricity, and the NTC subassembly includes sheetmetal, hollow metal pipe and thermistor, and the sheetmetal setting is on the top of hollow metal pipe, and the end and the signal processing unit electricity of hollow metal pipe are connected, and outside one side of sheetmetal exposed the casing, the thermistor setting was intraductal and hugged closely with the sheetmetal in the hollow metal. The device adopts the NTC component with the antenna function to be connected with the signal processing unit, thereby improving the wireless signal transmission performance.

Description

Wireless high-temperature probe for baking, steaming and roasting

Technical Field

The utility model relates to a food toasts the thermometer field of roast steaming, especially relates to a wireless high temperature resistant barbecue thermometer.

Background

At present, the method for baking food generally selects a fixed baking program of corresponding food materials, and cannot realize accurate and intelligent monitoring of the baking condition of the food. The maturity of the food cannot be accurately controlled, the maturity and the baking time of the baked food need to be artificially judged, and the difference of individual experiences can influence the maturity judgment of the baked food, so that the control on the maturity of the food is different when the same individual bakes the food or different individuals bake the food each time; and the user often needs to bake several times repeatedly to ensure the food to be mature, or often scorch the food, resulting in poor user experience of the oven.

The prior art discloses a barbecue thermometer (application number: 201520445823.5) capable of monitoring temperature in real time, which comprises a main body part and a probe connected to the main body part and used for being inserted into food to measure temperature, wherein the main body part comprises a shell, a circuit board, a temperature measuring module, a buzzer, a display screen and a communication component capable of sending temperature information to a mobile terminal, and the circuit board is arranged in the shell; the temperature measuring module and the communication component are arranged on the circuit board; the buzzer and the display screen are respectively connected with the circuit board; the probe is connected with the temperature measuring module. By this, can send the communication part of barbecue food temperature information to mobile terminal through implanting in the thermometer, make the user can real-time supervision barbecue temperature to, prevent that food from leading to roast the destruction because of the high temperature, the phenomenon that can't eat takes place, has reduced the loss, simultaneously, this barbecue thermometer's real-time supervision function can make the user need not wait for before the barbecue stove all the time, has improved the convenience of barbecue.

At present, the temperature sensor is generally arranged in a stainless steel probe, a high-temperature resistant Teflon lead is adopted to lead out a temperature sensing signal to a measuring unit far away from a high-temperature heat source of an oven and display the temperature of the food to be measured. However, when the product is used, the probe part is inserted into food and placed into the oven together, the main body part is installed outside the oven, the probe and the main body part are connected through a cable, one end of the probe needs to extend out of the oven through the oven door to be connected with the main body part, the thermometer can only monitor the temperature inside the food, the temperature of the external environment cannot be grasped in real time, and therefore the use experience of the product is poor.

In order to solve the technical problem, the applicant develops a wireless temperature probe system device according to the functional requirement of the oven for food temperature measurement, and the high-temperature wireless probe is used for acquiring the central temperature of the barbecue baked food and the temperature of the oven outside the food and judging the maturity of the food. The applicant previously filed an barbecue monitor (application No. 201710331397.6) comprising: a first housing; one end of the first shell is of a closed pointed structure; the surface of the first shell is also provided with an insertion depth reference mark; the position of the insertion reference mark is the minimum depth of the first shell inserted into the food to be tested during barbecue; the first temperature sensor, the power supply and the circuit board are arranged in the first shell; a second housing; and a second temperature sensor and a communication device disposed within the second housing; and the communication device is connected with the circuit board and used for outputting the temperatures detected by the first temperature sensor and the second temperature sensor to the intelligent terminal. Therefore, the user can accurately judge the current doneness of the food according to the temperature received by the intelligent terminal and predict the time required by the food to be roasted to the target doneness, thereby accurately monitoring the doneness of the roasted food.

Inside this product was inside inserting food with first casing when using, the second casing exposes in external environment, monitors external environment temperature and the inside temperature of food simultaneously, and this product passes through wireless connection with user's intelligent terminal, and the user can accurately judge the present doneness of food and predict that food is roast to the required duration of target doneness according to the temperature that intelligent terminal received to the doneness of accurate monitoring barbecue food.

In order to ensure that the probe can keep stable operation in a high-temperature environment, the heat insulation performance of an internal circuit of the probe needs to be improved and the wireless signal transmission effect of the probe needs to be enhanced; in addition, food generally remains in the product after use, and needs to be cleaned, but the waterproof, corrosion-resistant and oil smoke-resistant performances of the product are general, and the improvement of the product is also needed.

Disclosure of Invention

To the weak point that exists among the above-mentioned technique, the utility model provides a wireless high temperature probe of baking and steaming, the device adopt the NTC subassembly that has the antenna function to be connected with signal processing unit, improve its wireless signal transmission performance.

Another object of the present invention is to provide the device with vacuum and/or thermal insulation material inside, so that its internal circuit can work normally in high temperature environment.

The utility model discloses a still another purpose is, the device adopts high temperature injection molding process to connect, guarantees that it has good waterproof sealing nature, and corrosion-resistant anti-oil smoke can be placed and soak in the aquatic and wash, and the device simple structure, excellent in use effect.

To achieve the above object, the present invention is implemented as follows:

a baking, steaming and baking wireless high-temperature probe comprises a shell and a PCBA, wherein the PCBA is provided with a signal processing unit and at least one food temperature sensor, and the baking, steaming and baking wireless high-temperature probe is characterized by further comprising an NTC component, the NTC component is electrically connected with the signal processing unit, the shell is of a hollow tubular structure, the NTC component is arranged at the upper part in the shell, and the PCBA is arranged at the lower half section in the shell; the utility model discloses a solar energy collector, including casing, NTC subassembly, signal processing unit, thermal insulation material, the inside vacuum of casing and packing, be provided with farad electric capacity in the casing, farad electric capacity is connected and supplies power to PCBA with PCBA electricity, the NTC subassembly includes sheetmetal, hollow metal pipe and thermistor, the sheetmetal sets up the top at hollow metal pipe, the end and the signal processing unit electricity of hollow metal pipe are connected, and outside one side of sheetmetal exposes the casing, thermistor sets up in hollow metal pipe and hugs closely with the sheetmetal.

When the hollow metal tube of NTC subassembly is direct to be connected with signal processing unit, hollow metal tube is as transmission medium, and signal processing unit's bluetooth radio frequency signal can launch through hollow metal pole, and temperature data can wireless transmission to intelligent terminal such as cell-phone demonstration and operation.

The farad capacitor is a chemical element developed from the seventies and eighties of the last century, stores energy through polarized electrolyte but does not generate chemical reaction, and the energy storage process is reversible, and the farad capacitor can be repeatedly charged and discharged for tens of thousands of times. The farad capacitance is different from the common capacitance in capacity, the maximum capacity of the common capacitor is 1-4 thousands microfarads, and the maximum capacity of the farad capacitance can reach thousands of farads.

Further, the PCBA is further provided with a communication module, the communication module is arranged on the upper portion of the shell and comprises a microstrip line and/or a PCB antenna or a spring antenna, the microstrip line is connected with the signal processing unit, and the PCB antenna or the spring antenna is connected with the microstrip line. The arrangement of the communication module can increase the wireless transmission effect of the device, and various connection modes can be selected in different frequency bands of wireless radio frequency.

Further, the shell comprises a first shell and a second shell, the first shell is made of a non-metal material, the second shell is made of stainless steel, and the first shell and the second shell are integrally formed through an injection molding process. The first shell and the second shell are integrally formed by adopting a high-temperature injection molding process, so that the device has good sealing and waterproof performance, the waterproof, corrosion-resistant and oil smoke-resistant effects are ensured, and the device can be placed in water to be saturated and washed; radio frequency signals are output from the signal processing unit, the microstrip line enables the signals to penetrate through the shielding part of the stainless steel pipe of the second shell, the signals reach the top of the non-metal material of the first shell, the signals are transmitted to the space, and intelligent terminals such as mobile phones and the like can receive and operate the signals. The device is also provided with a special external charger, the metal sheet of the NTC component is contacted with the positive pole of the external charger, the outer wall of the second shell is contacted with the negative pole of the charger, the farad capacitor is required to be rapidly charged by the external charger before use, and the device can be used for more than 4 hours after each charge.

Furthermore, the bottom of the hollow metal tube is in a cross-groove shape and is divided into four notches, two shallow notches are symmetrically arranged, and two deep notches are symmetrically arranged. In practical application, two lead wires of the thermistor can be respectively led out from two deep notches after being sleeved with high-temperature-resistant Teflon sleeves, and the two shallow notches can be directly inserted into the PCBA and are communicated with a communication module or a signal processing unit.

Further, a silica gel plug is further sleeved on the hollow metal tube and abuts against the metal sheet, and the silica gel plug is matched with the shell. The silica gel stopper closely cooperates with the casing, prevents that water and oil smoke from entering into the casing inside the junction at sheetmetal and casing top, influences the normal use of device.

Further, when two or more food temperature sensors are provided, the food temperature sensors are evenly distributed along the housing on the PCBA. The PCBA is provided with a plurality of food temperature sensors for measuring the temperature gradient from the food center to the surface of the food, so that the food maturity degree can be accurately judged conveniently.

Further, the PCBA adopts a double-crystal oscillator mechanism, an external 32768Khz crystal oscillator is adopted in a Bluetooth radio frequency communication part of the signal processing unit, an RC clock source in a chip is not adopted, the frequency stability limit of the RC clock source is 0.1%, and the stability limit of the external crystal oscillator is 0.003%. Because the device is used in an environment with rapid temperature change, the crystal oscillator frequency and an electronic device are easy to generate temperature drift to cause clock switching, and the frequency drift of the crystal oscillator is quickly tracked by a double-crystal oscillator mechanism to compensate, so that when the temperature changes by 300 ℃, the clock frequency can still meet the precision requirement, and the wireless communication signal connection is stable.

Further, a groove or a colored laser scale mark serving as an insertion depth reference mark is arranged on the second shell. The recess or take the laser scale mark of colour for the user inserts the minimum degree of depth in the barbecue food with first casing, can guide the user to carry out the formal operation to when guaranteeing that the user inserts first casing to barbecue food, partial circuit structure in the casing inserts to barbecue food in, and then ensures that food temperature sensor, farad and PCBA all arrange food in, thereby avoid it to receive the direct toasting of barbecue stove fire, and then can guarantee that it all can normally work under the low temperature environment of barbecue food.

Further, the interior of the shell is vacuum and/or filled with heat insulation materials, and the heat insulation materials comprise nitrogen or paraffin. The shell is vacuumized and/or filled with a heat insulation material, so that the circuit device of the device can normally work in an environment of about 300 ℃, the high temperature resistance of the device is improved, nitrogen or paraffin is used as the filled heat insulation material, the heat insulation effect is good, and the production and processing cost is low.

The utility model has the advantages of, this device adopts the NTC subassembly that has the antenna function to be connected with signal processing unit, improves its wireless signal transmission performance.

The device is internally vacuumized and/or filled with heat insulation materials, so that an internal circuit can normally work in a high-temperature environment.

The device is connected by adopting a high-temperature injection molding process, ensures that the device has good sealing and waterproof performance, is corrosion-resistant and oil smoke-proof, can be placed in water to be soaked and cleaned, and has a simple structure and a good use effect.

Drawings

Fig. 1 is a schematic structural view of the wireless high-temperature probe for baking, steaming and baking of the present invention.

Fig. 2 is an exploded view of the wireless high temperature probe for baking, steaming and baking of the present invention.

Fig. 3 is a schematic structural diagram of an NTC component of the wireless high-temperature probe for baking, steaming and baking of the present invention.

Fig. 4 is a schematic structural diagram of the NTC component directly connected to the PCBA according to the first embodiment of the present invention.

Fig. 5 is a schematic structural diagram of the NTC component in the second embodiment of the present invention connected to the PCBA through the microstrip line.

Fig. 6 is a schematic structural diagram of the NTC component in the third embodiment of the present invention connected to the PCBA through the microstrip line and the spring antenna.

Fig. 7 is a schematic structural diagram of the NTC component in the fourth embodiment of the present invention connected to the PCBA through the microstrip line and the PCB antenna.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Reference is made to 1-4 for a first embodiment.

A wireless high-temperature probe for baking, steaming and roasting comprises a shell 1 and a PCBA3, wherein a signal processing unit (not shown in the figure) and at least one food temperature sensor (not shown in the figure) are arranged on the PCBA3, the wireless high-temperature probe is characterized by further comprising an NTC component 2, the NTC component 2 is electrically connected with the signal processing unit, the shell 1 is of a hollow tubular structure, the NTC component 2 is arranged at the upper part in the shell 1, and the PCBA3 is arranged at the lower half section in the shell 1; the shell 1 is internally provided with a farad capacitor 4, the farad capacitor 4 is electrically connected with the PCBA3 and supplies power to the PCBA3, the NTC component 2 comprises a metal sheet 21, a hollow metal tube 22 and a thermistor 23, the metal sheet 21 is arranged at the top end of the hollow metal tube 22, the tail end of the hollow metal tube 22 is electrically connected with the signal processing unit, one side face of the metal sheet 21 is exposed out of the shell 1, and the thermistor 23 is arranged in the hollow metal tube and is tightly attached to the metal sheet.

When the hollow metal tube 22 of the NTC component 2 is directly connected with the signal processing unit, the hollow metal tube 22 is used as a transmission medium, the Bluetooth radio frequency signal of the signal processing unit can be emitted through the hollow metal rod 22, and the temperature data can be wirelessly transmitted to intelligent terminals such as mobile phones for display and operation; a farad capacitor 4 is arranged in the shell 1 and provides electric energy for the device during working.

The housing 1 includes a first housing 11 and a second housing 12, the first housing 11 is made of a non-metal material, the second housing 12 is made of stainless steel, and the first housing 11 and the second housing 12 are integrally formed through an injection molding process. The first shell 11 and the second shell 12 are integrally formed by adopting a high-temperature injection molding process, so that the device has good sealing and waterproof performance, the waterproof, corrosion-resistant and oil smoke-resistant effects are ensured, and the device can be placed in water to be fully washed; the radio frequency signal is output from the signal processing unit, and the signal passes through the shielding part of the stainless steel pipe of the second shell through the hollow metal pipe, reaches the top of the non-metal material of the first shell 11, and transmits the signal to the space, so that intelligent terminals such as mobile phones and the like receive and operate. The device is also provided with a special external charger (not shown), the metal sheet 21 of the NTC component 2 is contacted with the positive pole of the external charger, the outer wall of the second shell 12 is contacted with the negative pole of the charger, the farad capacitor 4 is rapidly charged by the external charger before use, and the device can be used for more than 4 hours after each charging.

The bottom of the hollow metal tube 22 is in a cross-groove shape and is divided into four notches, wherein two shallow notches are symmetrically arranged, and two deep notches are symmetrically arranged. In practical application, two leads of the thermistor 23 can be respectively led out from the two deep notches after being sleeved with high-temperature-resistant Teflon sleeves, and the two shallow notches can be directly inserted into the PCBA and are communicated with the signal processing unit.

The hollow metal tube 22 is also sleeved with a silica gel plug 24, the silica gel plug 24 is supported on the metal sheet 21, and the silica gel plug 24 is matched with the shell 1. The silica gel plug 24 is tightly matched with the shell 1, so that water and oil smoke are prevented from entering the shell 1 from the joint of the metal sheet 21 and the top of the shell 1, and the normal use of the device is prevented from being influenced.

The food temperature sensors are evenly distributed along the housing on the PCBA 3. The PCBA3 is provided with a plurality of food temperature sensors for measuring the temperature gradient from the center of the food to the surface of the food, so that the maturity of the food can be accurately judged.

PCBA3 adopts a dual-crystal oscillator mechanism, and the Bluetooth radio frequency communication part of the signal processing unit adopts an external 32768Khz crystal oscillator instead of an internal RC clock source of a chip, wherein the frequency stability limit of the RC clock source is 0.1%, and the stability limit of the external crystal oscillator is 0.003%.

The second housing 12 is provided with a groove or colored laser scale mark as an insertion depth reference mark. 1, vacuum and/or filling heat insulation materials, wherein the heat insulation materials comprise nitrogen or paraffin. The shell 1 is vacuumized and filled with heat insulating materials, so that the circuit device of the device can normally work in the environment of about 300 ℃, and the high temperature resistance of the device is improved.

A second embodiment, see fig. 1-3, 5.

A wireless high-temperature probe for baking, steaming and roasting comprises a shell 1 and a PCBA3, wherein a signal processing unit (not shown in the figure) and at least two food temperature sensors (not shown in the figure) are arranged on the PCBA3, the wireless high-temperature probe is characterized by further comprising an NTC component 2, the NTC component 2 is electrically connected with the signal processing unit, the shell is of a hollow tubular structure 1, the NTC component 2 is arranged at the upper part in the shell 1, and the PCBA3 is arranged at the lower half section in the shell 1; the shell 1 is internally provided with a farad capacitor 4, the farad capacitor 4 is electrically connected with the PCBA3 and supplies power to the PCBA3, the NTC component 2 comprises a metal sheet 21, a hollow metal tube 22 and a thermistor 23, the metal sheet 21 is arranged at the top end of the hollow metal tube 22, the tail end of the hollow metal tube 22 is electrically connected with the signal processing unit, one side face of the metal sheet 21 is exposed out of the shell 2, and the thermistor 23 is arranged in the hollow metal tube 22 and is tightly attached to the metal sheet 21.

The housing 1 includes a first housing 11 and a second housing 12, the first housing 11 is made of a non-metal material, the second housing 12 is made of stainless steel, and the first housing 11 and the second housing 12 are integrally formed through an injection molding process.

The PCBA3 is further provided with a communication module 5, the communication module 5 is arranged on the upper part of the casing 1, the communication module 5 comprises a microstrip line 51, and the microstrip line 51 is connected with the signal processing unit. The arrangement of the communication module 5 can increase the wireless transmission effect of the device.

The bottom of the hollow metal tube 22 is in a cross-groove shape and is divided into four notches, wherein two shallow notches are symmetrically arranged, and two deep notches are symmetrically arranged. In practical application, two lead wires of the thermistor 23 can be respectively led out from two deep notches after being sleeved with high-temperature-resistant Teflon sleeves, and the two shallow notches can be directly inserted into the PCBA3 and are communicated with the communication module 5 or the signal processing unit.

When two or more food temperature sensors are provided, the food temperature sensors are evenly distributed along the housing on the PCBA 3. The PCBA3 is provided with a plurality of food temperature sensors for measuring the temperature gradient from the center of the food to the surface of the food, so that the maturity of the food can be accurately judged.

The second housing 12 is provided with a groove or colored laser scale mark as an insertion depth reference mark.

The interior of the shell 1 is evacuated and or filled with an insulating material comprising nitrogen or paraffin.

A third embodiment, see fig. 1-3, 6.

A wireless high-temperature probe for baking, steaming and roasting comprises a shell 1 and a PCBA3, wherein a signal processing unit (not shown in the figure) and at least two food temperature sensors (not shown in the figure) are arranged on the PCBA3, the wireless high-temperature probe is characterized by further comprising an NTC component 2, the NTC component 2 is electrically connected with the signal processing unit, the shell 1 is of a hollow tubular structure, the NTC component 2 is arranged at the upper part in the shell 1, and the PCBA3 is arranged at the lower half section in the shell 1; the shell 1 is internally provided with a farad capacitor 4, the farad capacitor 4 is electrically connected with the PCBA3 and supplies power to the PCBA3, the NTC component 2 comprises a metal sheet 21, a hollow metal tube 22 and a thermistor 23, the metal sheet 21 is arranged at the top end of the hollow metal tube 22, the tail end of the hollow metal tube 22 is electrically connected with the signal processing unit, one side face of the metal sheet 21 is exposed out of the shell 1, and the thermistor 23 is arranged in the hollow metal tube 22 and is tightly attached to the metal sheet 21.

The PCBA3 is further provided with a communication module 5, the communication module 5 is arranged on the upper part of the housing 1, the communication module 5 comprises a microstrip line 51 and a PCB antenna 52, the microstrip line 51 is connected with the signal processing unit, and the PCB antenna 52 is connected with the microstrip line 51. The arrangement of the communication module 5 can increase the wireless transmission effect of the device.

The hollow metal tube 22 is also sleeved with a silica gel plug 24, the silica gel plug 24 is supported on the metal sheet 21, and the silica gel plug 25 is matched with the shell 1. The silica gel plug 24 is tightly matched with the shell 1, so that water and oil smoke are prevented from entering the shell 1 from the joint of the metal sheet 21 and the top of the shell 1, and the normal use of the device is prevented from being influenced.

A fourth embodiment, see fig. 1-3, 7.

A wireless high-temperature probe for baking, steaming and roasting comprises a shell 1 and a PCBA3, wherein a signal processing unit (not shown in the figure) and at least two food temperature sensors (not shown in the figure) are arranged on the PCBA3, the wireless high-temperature probe is characterized by further comprising an NTC component 2, the NTC component 2 is electrically connected with the signal processing unit, the shell 1 is of a hollow tubular structure, the NTC component 2 is arranged at the upper part in the shell 1, and the PCBA3 is arranged at the lower half section in the shell 1; the shell 1 is internally provided with a farad capacitor 4, the farad capacitor 4 is electrically connected with the PCBA3 and supplies power to the PCBA3, the NTC component 2 comprises a metal sheet 21, a hollow metal tube 22 and a thermistor 23, the metal sheet 21 is arranged at the top end of the hollow metal tube 22, the tail end of the hollow metal tube 22 is electrically connected with the signal processing unit, one side face of the metal sheet 21 is exposed out of the shell, and the thermistor 23 is arranged in the hollow metal tube 22 and is tightly attached to the metal sheet 21.

The housing 1 includes a first housing 11 and a second housing 12, the first housing 11 is made of a non-metal material, the second housing 2 is made of stainless steel, and the first housing 11 and the second housing 12 are integrally formed through an injection molding process.

The PCBA3 is further provided with a communication module 5, the communication module 5 is arranged on the upper part of the housing 1, the communication module 5 comprises a microstrip line 51 and a spring antenna 53, the microstrip line 51 is connected with the signal processing unit, and the spring antenna 53 is connected with the microstrip line 51. The arrangement of the communication module 5 can increase the wireless transmission effect of the device.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A baking, steaming and baking wireless high-temperature probe comprises a shell and a PCBA, wherein the PCBA is provided with a signal processing unit and at least one food temperature sensor, and the baking, steaming and baking wireless high-temperature probe is characterized by further comprising an NTC component, the NTC component is electrically connected with the signal processing unit, the shell is of a hollow tubular structure, the NTC component is arranged at the upper part in the shell, and the PCBA is arranged at the lower half section in the shell; be provided with farad electric capacity in the casing, farad electric capacity is connected with PCBA electricity and supplies power to PCBA, the NTC subassembly includes sheetmetal, hollow metal pipe and thermistor, the sheetmetal sets up the top at hollow metal pipe, the end and the signal processing unit electricity of hollow metal pipe are connected, and outside a side exposure casing of sheetmetal, thermistor sets up in hollow metal pipe and hugs closely with the sheetmetal.

2. The wireless high-temperature probe for baking, steaming and baking according to claim 1, wherein the PCBA is further provided with a communication module, the communication module is disposed at the upper part of the housing, the communication module comprises a microstrip line and/or a PCB antenna or a spring antenna, the microstrip line is connected with the signal processing unit, and the PCB antenna or the spring antenna is connected with the microstrip line.

3. The wireless high temperature probe according to claim 1, wherein the housing comprises a first housing and a second housing, the first housing is made of non-metallic material, the second housing is made of stainless steel, and the first housing and the second housing are integrally formed by injection molding.

4. The wireless high temperature probe for baking, steaming and roasting according to claim 1, wherein the bottom of the hollow metal tube is in a cross-groove shape and is divided into four notches, two shallow notches are symmetrically arranged, and two deep notches are symmetrically arranged.

5. The wireless high-temperature probe for baking, steaming and roasting of claim 1, wherein the hollow metal tube is further sleeved with a silicone plug, the silicone plug is supported on the metal sheet, and the silicone plug is matched with the shell.

6. A baking, steaming and baking wireless high-temperature probe according to claim 1, wherein when two or more food temperature sensors are provided, the food temperature sensors are evenly distributed along the housing on the PCBA.

7. The wireless high temperature probe for baking, steaming and baking as claimed in claim 1, wherein the PCBA employs a dual crystal oscillator mechanism, the Bluetooth RF communication part of the signal processing unit employs an external 32768Khz crystal oscillator instead of its on-chip RC clock source, the RC clock source frequency stability limit is 0.1%, and the external crystal oscillator stability limit is 0.003%.

8. The wireless high temperature probe for baking and steaming according to claim 3, wherein the second housing is provided with a groove or a colored laser scale mark as a reference mark of an insertion depth.

9. The wireless high temperature probe for baking and steaming according to claim 1, wherein the inside of the case is vacuum and/or filled with an insulating material comprising nitrogen or paraffin.