CN108261050B - Temperature measuring device and microwave cooking utensil - Google Patents
Temperature measuring device and microwave cooking utensil Download PDFInfo
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- CN108261050B CN108261050B CN201810274735.1A CN201810274735A CN108261050B CN 108261050 B CN108261050 B CN 108261050B CN 201810274735 A CN201810274735 A CN 201810274735A CN 108261050 B CN108261050 B CN 108261050B
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- 238000010411 cooking Methods 0.000 title claims abstract description 37
- 238000001514 detection method Methods 0.000 claims abstract description 34
- 229910052751 metal Inorganic materials 0.000 claims description 136
- 239000002184 metal Substances 0.000 claims description 136
- 238000009529 body temperature measurement Methods 0.000 claims description 11
- 239000007769 metal material Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000741 silica gel Substances 0.000 claims description 4
- 229910002027 silica gel Inorganic materials 0.000 claims description 4
- 238000007599 discharging Methods 0.000 abstract description 4
- 235000013305 food Nutrition 0.000 description 14
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 235000021168 barbecue Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
- H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors
- H05B6/6452—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors the sensors being in contact with the heated product
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J27/00—Cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J36/00—Parts, details or accessories of cooking-vessels
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
- H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors
Landscapes
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a temperature measuring device and a microwave cooking appliance, wherein the temperature measuring device comprises a temperature detector, a shielding piece, an energy release piece and a connector; the temperature detector comprises a temperature detection head and a first signal wire; the shielding piece sleeve is used for shielding microwaves; the energy release member is connected with the first signal wire and/or the shielding member, and the energy release member is grounded to induce eddy currents on the first signal wire and/or the shielding member. According to the technical scheme, the energy discharging piece is arranged, so that the eddy current generated on the shielding piece and/or the first signal wire in the microwave environment is discharged, and is discharged rapidly before the shielding piece and/or the first signal wire generates a large amount of heat, so that the shielding piece and/or the first signal wire can not generate higher temperature due to the eddy current, and therefore the temperature measuring device has higher anti-interference capability and detection accuracy in the microwave environment.
Description
Technical Field
The invention relates to the field of microwave cooking appliances, in particular to a temperature measuring device and a microwave cooking appliance.
Background
The microwave cooking appliance heats food by generating microwaves, and temperature measurement and control are important means for achieving an optimal cooking effect. Due to the specificity of the microwave environment, current food temperature measurement schemes mainly have the following problems: for traditional temperature sensor (such as NTC, thermocouple, etc.) schemes, such schemes are not used in the microwave oven field because microwaves can have serious impact on such sensors and no real data is available. For the optical fiber food probe scheme, although the optical fiber is not affected by microwaves, the product is difficult to popularize and use due to high cost. In addition, an infrared temperature measurement scheme is also provided, the precision of the non-contact temperature measurement scheme is not high, and the working process is greatly influenced by the environment (such as water vapor generated when liquid is heated can cause great errors in infrared measurement). At present, although the shielding layer is also used for wrapping the temperature detector so as to overcome the influence of microwaves on the temperature sensor, because the shielding layer is used for shielding the microwaves, the microwaves are easy to generate vortex on the shielding layer, so that the shielding layer is seriously heated, and the temperature sensor is interfered by self-heating of the shielding layer, so that the temperature detection cannot be accurately performed.
Disclosure of Invention
The invention mainly aims to provide a temperature measuring device and a microwave cooking utensil, and aims to improve the temperature detection precision of the temperature measuring device in a microwave environment.
In order to achieve the above object, the present invention provides a temperature measuring device for a microwave cooking appliance, the temperature measuring device comprising:
the temperature detector comprises a temperature detection head and a first signal wire electrically connected with the temperature detection head;
the shielding piece is sleeved on the outer side of the first signal wire so as to shield microwaves;
the energy leakage piece is connected with the first signal wire and/or the shielding piece and is grounded so as to lead out vortex flow on the first signal wire and/or the shielding piece;
and the connector is electrically connected with the first signal wire so as to transmit the detection signal of the temperature detection head.
Preferably, the energy release member is made of a metal material.
Preferably, the energy release member is located between the first signal line and the shielding member, and the energy release member is wrapped outside the first signal line.
Preferably, the temperature measuring device further comprises a metal shell, the temperature detector further comprises a second signal wire, the second signal wire is electrically connected between the temperature detecting head and the first signal wire, and the metal shell is sleeved outside the temperature detecting head and the second signal wire.
Preferably, the temperature measuring device further comprises a heat conducting piece, and the heat conducting piece is arranged between the metal shell and the temperature detecting head;
the heat conduction piece comprises heat conduction silica gel filled between the metal shell and the temperature detection head.
Preferably, the temperature measuring device further comprises a flexible connecting pipe, wherein the flexible connecting pipe is connected between the metal shell and the connector, and the flexible connecting pipe wraps the shielding piece, the energy leakage piece and the first signal wire.
Preferably, the temperature measuring device further comprises a first conductive member, wherein one end of the shielding member extends into the metal shell, and the first conductive member is clamped between the shielding member and the inner wall of the metal shell so as to electrically connect the metal shell and the shielding member.
Preferably, the first conductive member is made of metal, and two opposite sides of the first conductive member are respectively attached to the inner wall of the metal shell and the outer surface of the shielding member, so that the first conductive member, the shielding member and the inner wall of the metal shell are tightly matched.
Preferably, the temperature detector further comprises a third signal line connected to an end of the first signal line remote from the temperature detection head; the connector comprises a metal sleeve and a connector, the connector is positioned at one end of the metal sleeve far away from the temperature detection head, one end of the shielding piece extends into the metal sleeve, and the metal sleeve is sleeved outside the third signal wire;
the connector includes a first conductive portion and a second conductive portion insulated from each other; the first conductive part is electrically connected with the energy release piece, and the second conductive part is electrically connected with the third signal line.
Preferably, the first conductive part is connected with a metal housing of the microwave cooking appliance.
Preferably, the connector further comprises a second conductive member, and the second conductive member is sandwiched between the inner wall of the metal sleeve and the shielding member to electrically connect the metal sleeve and the shielding member.
Preferably, the second conductive member is made of metal, and two opposite sides of the second conductive member are respectively attached to the inner wall of the metal sleeve and the outer surface of the shielding member, so that the second conductive member, the shielding member and the inner wall of the metal sleeve are tightly matched.
The invention also provides a microwave cooking appliance, which comprises a microwave cooking appliance body and the temperature measuring device, wherein the microwave cooking appliance comprises a metal shell and a microwave cavity positioned in the metal shell, and a connector of the temperature measuring device is connected with the metal shell.
Preferably, a connecting seat is arranged on the metal shell and is connected with a connector of the temperature measuring device;
the connecting seat comprises a connecting seat body and a connecting interface exposed out of the metal shell, wherein the connecting seat body is electrically connected with the metal shell, and the connecting interface is used for electrically connecting external equipment with a first signal wire of the temperature measuring device.
According to the technical scheme, the shielding piece is arranged to carry out microwave shielding on the first signal wire of the temperature detector, so that the interference of the microwave environment on the temperature detector is avoided, and meanwhile, the energy leakage piece is arranged to discharge eddy currents generated in the microwave environment on the shielding piece and/or the first signal wire, so that the eddy currents are rapidly discharged before a large amount of heat is generated on the shielding piece and/or the first signal wire, the shielding piece and/or the first signal wire are guaranteed not to generate higher temperature due to the eddy currents, and the influence of the shielding piece and/or the first signal wire on the detection precision of the temperature detector due to overhigh temperature is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a portion of a temperature measuring device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of the view angle A in FIG. 1;
FIG. 3 is a schematic diagram of another embodiment of a portion of a temperature measuring device according to the present invention;
fig. 4 is a schematic structural diagram of an embodiment of a connection structure between the joint and the housing of the microwave cooking appliance in fig. 3.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the name |
| 10 | Temperature detecting head | 40 | Connector with a plurality of connectors |
| 11 | First signal line | 41 | Metal sleeve |
| 12 | Second signal line | 42 | Joint |
| 13 | Third signal line | 421 | First conductive part |
| 11a | Positive pole line | 422a | A first conductive region |
| 11b | Negative electrode wire | 422b | Second conductive region |
| 20 | Shielding piece | 44 | Second protective sleeve |
| 21 | Energy release piece | 43 | Second guideElectric component |
| 22 | Flexible connecting pipe | 50 | Metal shell |
| 23 | First conductive member | 60 | Connecting seat body |
| 24 | First protective sleeve | 61a | First connection interface |
| 30 | Metal shell | 61b | Second connection interface |
| 31 | Heat conducting piece |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.
In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
The invention provides a temperature measuring device which is used for a microwave cooking appliance, wherein the microwave cooking appliance is provided with a microwave cavity for accommodating food and heating the food by microwaves. The temperature measuring device is used for detecting the temperature of food in the microwave cavity, can be arranged separately from the microwave cooking utensil, and can also be fixed on the microwave cooking utensil, and is not particularly limited herein.
Referring to fig. 1 and 2, specifically, the temperature measuring device includes a temperature detector, a shielding member 20, an energy release member 21, and a connector 40; the temperature detector comprises a temperature detection head 10 and a first signal wire 11 electrically connected with the temperature detection head 10; the shielding member 20 is sleeved on the outer side of the first signal wire 11 to shield microwaves; the energy release member 21 (not shown in fig. 1) is connected to the first signal line 11 and/or the shielding member 20, and the energy release member 21 is grounded to induce eddy currents on the first signal line 11 and/or the shielding member 20; the connector 40 is electrically connected to the first signal line 11 to transmit a detection signal of the temperature detection head 10.
In this embodiment, the temperature detector detects the temperature of the food in the microwave cavity through the temperature detecting head 10, and converts the temperature value into a usable output signal through the first signal line 11. The temperature detector may be in various forms, such as a thermal resistance type temperature detector or a thermocouple type sensor. An NTC temperature sensor is preferably adopted in the scheme; the NTC temperature sensor is a thermistor, and the resistance value of the NTC thermistor is rapidly reduced along with the temperature rise under certain measurement power, so that the corresponding temperature is determined by measuring the resistance value of the NTC thermistor, and the purposes of detecting and controlling the temperature are achieved; the first signal lines 11 are two (positive electrode line 11a and negative electrode line 11 b) and are respectively connected with the positive electrode and the negative electrode of the NTC thermistor, and the first signal lines 11 are also used for supplying power to the NTC thermistor. The NTC temperature sensor collects temperature data in a manner of being in direct contact with food, and the data are more accurate.
When the microwave cooking utensil is in operation, microwaves are arranged in the microwave cavity of the microwave cooking utensil, the microwaves can cause interference to the first signal wire 11, so that the interference of the microwaves to the first signal wire 11 is avoided, the shielding piece 20 and the energy release piece 21 are arranged, the shielding piece 20 is used for shielding microwaves so as to isolate the microwaves at the outer side of the first signal wire 11, and as the shielding piece 20 is made of metal materials, a large amount of eddy currents are generated on the surface of the shielding piece 20 in an alternating electromagnetic environment in the microwave cavity, and then a large amount of heat productivity is caused by the eddy currents, so that heat transfer is generated between the shielding piece 20 and the first signal wire 11 wrapped in the shielding piece, and the accuracy of temperature detection of the temperature detector is further influenced. According to the scheme, when the shielding piece 20 and/or the first signal wire 11 generate eddy currents, the energy leakage piece 21 is electrically connected with the shielding piece 20 and/or the first signal wire 11 and the ground to guide the eddy currents on the first signal wire 11 and/or the shielding piece 20 to the ground, so that the eddy currents are rapidly discharged before the shielding piece 20 and/or the first signal wire 11 generate a large amount of heat, and the shielding piece 20 and/or the first signal wire 11 cannot generate higher temperature due to the eddy currents. It should be explained here that, when the first signal line 11 is covered with an insulating layer, the surface of the first signal line 11 hardly generates an eddy current, and when the first signal line 11 is a bare metal wire, the surface of the first signal line 11 generates a certain eddy current even if the shielding member 20 is protected. Meanwhile, the energy release member 21 may be used for heat transfer with the shielding member 20 and/or the first signal line 11 while releasing the eddy current, so as to release the heat generated on the shielding member 20 and/or the first signal line 11, so as to ensure the uniformity of the surface temperature of the shielding member 20 and/or the first signal line 11.
According to the technical scheme, the shielding piece 20 is arranged to carry out microwave shielding on the first signal wire 11 of the temperature detector, so that interference of a microwave environment on the temperature detector is avoided, and meanwhile, the energy release piece 21 is arranged to release eddy currents generated on the shielding piece 20 and/or the first signal wire 11 in the microwave environment, so that the eddy currents are released rapidly before a large amount of heat is generated on the shielding piece 20 and/or the first signal wire 11, the shielding piece 20 and/or the first signal wire 11 are guaranteed not to generate higher temperature due to the eddy currents, and influence on detection accuracy of the temperature detector due to overhigh temperature of the shielding piece 20 and/or the first signal wire 11 is avoided.
It is to be understood that, since the energy release member 21 can release the eddy current, the energy release member 21 is made of a conductor, and the conductor is not limited to metal, but may be graphite or the like. In this embodiment, the energy release member 21 is preferably made of a metal material. The metal material not only has better electric conductivity, but also has good heat conductivity. In an embodiment, the energy release member 21 is located between the first signal line 11 and the shielding member 20, and the energy release member 21 is wrapped outside the first signal line 11. The energy release member 21 is preferably an aluminum film, the aluminum is a lightweight, heat-conductive and flexible metal material, and the aluminum film is wrapped on the outer side of the first signal wire 11, so that on one hand, the aluminum film can co-act with the shielding member 20 to shield interference of microwaves on the first signal wire 11, and on the other hand, the aluminum film can simultaneously contact the first signal wire 11 and the shielding member 20 to release heat on the first signal wire 11 and the shielding member 20, so that high temperature generated by heat accumulation on the first signal wire 11 and the shielding member 20 is prevented, and detection accuracy of the temperature sensor is affected.
The shielding member 20 is preferably a metal woven mesh, which may be a copper mesh or an aluminum mesh, and is sleeved on the outer sides of the first signal line 11 and the aluminum film, so as to be used as a first layer of shielding protection. The shielding member 20 may also increase the contact area between the temperature measuring device and the external environment by heat transfer with the energy release member 21 and the first signal line 11, so as to enhance the heat dissipation effect, and prevent the temperature of the temperature measuring device from being too high, thereby affecting the accuracy of detection.
Referring to fig. 1, further, in order to facilitate the temperature measuring device to extend into food to detect the temperature of the food, the temperature measuring device further includes a metal housing 30, the temperature detector further includes a second signal wire 12, the second signal wire 12 is electrically connected between the temperature detecting head 10 and the first signal wire 11, and the metal housing 30 is sleeved outside the temperature detecting head 10 and the second signal wire 12. It can be appreciated that the first signal line 11 and the second signal line 12 may be connected, or may be integrally disposed, the metal casing 30 is wrapped around the temperature detecting head 10 and the outer side of the second signal line 12, when in use, the end portion of the metal casing 30 corresponding to the temperature detecting head 10 extends into food, and heat of the food is sensed by the temperature detecting head 10 through heat conduction of metal, and meanwhile, the metal casing 30 is also used for shielding microwaves, so as to avoid interference of the microwaves on the second signal line 12.
In an embodiment, in order to reduce the volume of the temperature measuring device, the metal casing 30 is elongated, the temperature detecting head 10 is correspondingly located at a first end of the metal casing 30, and the first end of the metal casing 30 is tapered, so that the metal casing 30 is inserted into a smaller volume of food to detect the temperature of the food.
Further, in order to improve the accuracy and sensitivity of the temperature sensing head 10 to sense the temperature, the temperature measuring device further includes a heat conducting member 31, wherein the heat conducting member 31 is disposed between the metal housing 30 and the temperature sensing head 10; the heat conducting piece 31 has better heat conducting property, and can rapidly and uniformly guide the heat on the metal shell 30 to the temperature detection head 10, and the material of the heat conducting piece 31 can be metal. The heat conduction silica gel has good heat conduction and does not have electric conduction, so that the influence of microwaves on the heat conduction silica gel can be avoided, the electric performance of the temperature detector cannot be influenced, and the anti-interference capability of the temperature measuring device is improved.
Referring to fig. 2, the temperature measuring device further includes a flexible connection pipe 22, wherein the flexible connection pipe 22 is connected between the metal housing 30 and the connector 40, and the flexible connection pipe 22 wraps the shielding member 20, the energy release member 21 and the first signal line 11. Based on the above embodiment, the temperature measuring device is provided with a section between the metal casing 30 and the connector 40, which is respectively provided with the first signal line 11, the energy release member 21, the shielding member 20 and the flexible connecting pipe 22 from inside to outside. The flexible connecting pipe 22 improves the flexibility of the position of the metal shell 30 and the use convenience of the temperature measuring device. In this embodiment, the flexible connection pipe 22 is preferably made of a material that has high flexibility and is resistant to high temperatures (above 300 ℃).
Since the metal casing 30 generates eddy currents on the surface thereof in the microwave environment, and more heat is generated on the metal casing 30, if the heat is transferred to the temperature detecting head 10, the detecting precision of the temperature detecting head 10 is greatly affected, so in this solution, in order to improve the temperature detecting accuracy of the temperature detecting device, the temperature detecting device further includes a first conductive member 23, one end of the shielding member 20 extends into the metal casing 30, the first conductive member 23 is sandwiched between the shielding member 20 and the inner wall of the metal casing 30 to electrically connect the metal casing 30 and the shielding member 20, and since the shielding member 20 is electrically connected with the energy discharging member 21, the eddy currents on the metal casing 30 can be led out to the ground by the energy discharging member 21 through the first conductive member 23, thereby avoiding more heat generated by eddy currents on the metal casing 30. It should be noted that, although the outer layer of the shielding member 20 has a layer of flexible connection pipe 22, the portion of the flexible connection pipe 22 extending into the metal casing 30 is removed in advance, so that the metal casing 30 and the shielding member 20 have better electrical connection stability.
In this embodiment, the first conductive member 23 is preferably made of a metal material, and the first conductive member 23 may be formed in various shapes, such as a sheet shape, a block shape, or the like. In order to improve the position between the fixed metal casing 30 and the shielding member 20, the two opposite sides of the first conductive member 23 are respectively attached to the inner wall of the metal casing 30 and the outer surface of the shielding member 20, so that the first fastening member, the shielding member 20 and the inner wall of the metal casing 30 are tightly matched, preferably, the first conductive member 23 is in a metal ring shape, the outer surface of the metal ring is attached to the inner wall of the metal casing 30, the first signal wire 11, the energy release member 21 and the shielding member 20 penetrate through the metal ring, and the shielding member 20 is attached to the inner surface of the metal ring.
Further, in order to make the connection between the metal casing 30 and the shielding member 20 more stable, in this solution, the temperature measuring device further includes a first protection sleeve 24, where the first protection sleeve 24 is made of an insulating material, such as rubber, plastic, etc., and the first protection sleeve 24 is sleeved at the connection between the metal casing 30 and the shielding member 20, so as to fix and protect the connection between the metal casing 30 and the shielding member 20.
Please refer to fig. 3 and fig. 4, wherein fig. 3 and fig. 1 are schematic structural diagrams of a complete embodiment of the temperature measuring device according to the present embodiment. In this embodiment, the connector 40 is configured to transmit a detection signal of the temperature detecting head 10, and when the temperature measuring device is used to measure the temperature, the connector 40 is connected to a specific detecting device or a main control board of the microwave cooking device, so as to obtain a specific detection result of the temperature measuring device. Specifically, the temperature detector further includes a third signal line 13, and the third signal line 13 is connected to an end of the first signal line 11 remote from the temperature detection head 10; the connector 40 includes a metal sleeve 41 and a joint 42, the joint 42 is located at one end of the metal sleeve 41 away from the temperature detecting head 10, one end of the shielding member 20 extends into the metal sleeve 41, and the metal sleeve 41 is sleeved outside the third signal line 13 to shield microwaves, so as to avoid the microwaves from interfering the third signal line 13; the connector 42 includes a first conductive portion 421 and a second conductive portion insulated from each other; the first conductive portion 421 is electrically connected to the energy release member 21, and the second conductive portion is electrically connected to the third signal line 13. In this embodiment, the first conductive portion 421 is connected to the metal housing 50 of the microwave cooking appliance, and it is understood that the metal housing 50 of the microwave cooking appliance is grounded, and thus the energy release member 21 is grounded through the first conductive portion 421.
It will be understood by those skilled in the art that the structures and circuit configurations of the first signal line 11, the second signal line 12, and the third signal line 13 are identical, and the three may be integrally provided. When the temperature detector is an NTC temperature sensor, the third signal lines 13 are two (of course, the first signal line 11/the second signal line 12 are two corresponding to each other), and are respectively a positive electrode line 11a and a negative electrode line 11b, and at this time, the first conductive portion 421 is divided into two conductive regions (a first conductive region 422a and a second conductive region 422 b) insulated from each other, and are respectively connected to the positive electrode line 11a and the negative electrode line 11 b.
Further, since the surface of the metal sleeve 41 generates eddy currents in the microwave environment, and thus more heat is generated on the surface of the metal sleeve 41, if the heat is transferred to the third signal line 13, the first signal line 11, the second signal line 12 or the temperature detecting head 10, the detecting precision of the temperature detector is greatly affected, in this scheme, in order to improve the temperature measuring accuracy of the temperature measuring device, the connector 40 further includes a second conductive member 43, and the second conductive member 43 is sandwiched between the inner wall of the metal sleeve 41 and the shielding member 20 to electrically connect the metal sleeve 41 and the shielding member 20. Whereby the energy release member 21 is electrically connected to the metal sleeve 41, and the vortex on the metal sleeve 41 is released by the energy release member 21.
Based on the above embodiment, the metal sleeve 41 is electrically connected to the first conductive portion 421 of the joint 42, and the first conductive portion 421 is electrically connected to the metal housing 50 of the microwave cooking appliance, so that the energy release member 21 and the metal sleeve 41 can be grounded through the metal housing 50, thereby realizing the release of the eddy current.
In this embodiment, the second conductive member 43 is preferably made of a metal material, and the second conductive member 43 may be formed in various shapes, such as a sheet shape, a block shape, or the like. In order to improve the position between the fixed metal sleeve 41 and the shielding member 20, the two opposite sides of the second conductive member 43 are respectively attached to the inner wall of the metal sleeve 41 and the outer surface of the shielding member 20, so that the second conductive member 43, the shielding member 20 and the inner wall of the metal sleeve 41 are tightly matched, preferably, the second conductive member 43 is in a metal ring shape, the outer surface of the metal ring is attached to the inner wall of the metal sleeve 41, the second signal wire 12, the energy release member 21 and the shielding member 20 pass through the metal ring, and the shielding member 20 is attached to the inner surface of the metal ring.
Further, in order to make the connection between the metal sleeve 41 and the shielding member 20, and the joint 42 more stable, in this embodiment, the temperature measuring device further includes a second protective sleeve 44, where the second protective sleeve 44 is made of an insulating material, such as rubber, plastic, etc., and the second protective sleeve 44 is sleeved outside the metal sleeve 41 and extends to the connection between the metal sleeve 41 and the shielding member 20, and the joint 42, so as to fix and protect the connection between the metal sleeve 41 and the shielding member 20, and the connection between the metal sleeve 41 and the joint 42.
As can be seen from the above embodiments, in the technical solution of the present invention, the metal casing 30, the first conductive member 23, the shielding member 20, the second conductive member 43, the metal sleeve 41 and the metal casing 50 of the microwave cooking appliance are electrically connected to each other, so as to form a shielding cover to completely encapsulate the temperature detector, so that the temperature detector is not interfered by the microwave environment, and the working stability of the temperature detector is improved; meanwhile, the energy discharging piece 21 discharges the vortex generated on each part in the shielding case to the ground in time, so that self-heating caused by the vortex is avoided, and the detection accuracy of the temperature measuring device is further improved. Finally, the heat conduction performance among all the components in the shielding case is good, so that heat generated on one component due to vortex can be timely transferred to other components, excessive heat accumulation on the component is avoided, and the detection accuracy of the temperature detector is affected.
The invention also provides a microwave cooking appliance, which comprises a microwave cooking appliance body and the temperature measuring device, wherein the microwave cooking appliance comprises a metal shell 50 and a microwave cavity positioned in the metal shell 50, and a connector 40 of the temperature measuring device is connected with the metal shell 50. In an embodiment, the metal housing 50 is provided with a through hole for accommodating the connector 40 of the temperature measuring device. The specific structure of the temperature measuring device refers to the above embodiments, and because the microwave cooking appliance adopts all the technical schemes of all the embodiments, the microwave cooking appliance has at least all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. The microwave cooking utensil can be a microwave oven, a microwave barbecue oven, a microwave electric cooker and the like.
Referring to fig. 3 and 4, in order to facilitate the temperature measuring device and the metal housing 50 to be more adaptive and convenient to connect, in this embodiment, a connecting seat is disposed on the metal housing 50, and the connecting seat is connected with the connector 40 of the temperature measuring device; the connecting seat comprises a connecting seat body 60 and a connecting interface exposed outside the metal shell 50, wherein the connecting seat body 60 is electrically connected with the metal shell 50, and the connecting interface is used for electrically connecting external equipment with the first signal wire 11 of the temperature measuring device.
Specifically, the connector holder has a jack into which the plug of the connector 40 is inserted, the connector holder body 60 is a conductor, the first signal line 11 has an independent positive line 11a and negative line 11b, the connection interfaces include a first connection interface 61a and a second connection interface 61b, when the connector 40 is inserted into the connector holder jack, the first conductive portion 421 of the connector 40 contacts the connector holder body 60, and the two are electrically connected, and the second conductive portion of the connector 40 includes a first conductive region 422a and a second conductive region 422b, which are electrically connected to the first connection interface 61a and the second connection interface 61b, respectively. Insulation is achieved between the first connection interface 61a and the second connection interface 61b through an insulation portion.
The foregoing description is only of the preferred embodiments of the present invention and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (13)
1. A temperature measuring device for a microwave cooking appliance, the temperature measuring device comprising:
the temperature detector comprises a temperature detection head and a first signal wire electrically connected with the temperature detection head;
the shielding piece is sleeved on the outer side of the first signal wire so as to shield microwaves;
the energy leakage piece is positioned between the first signal wire and the shielding piece, the energy leakage piece is wrapped outside the first signal wire, the energy leakage piece is connected with the first signal wire and/or the shielding piece, and the energy leakage piece is grounded so as to lead out vortex on the first signal wire and/or the shielding piece;
and the connector is electrically connected with the first signal wire so as to transmit the detection signal of the temperature detection head.
2. The temperature measuring device of claim 1, wherein the energy release member is made of a metal material.
3. The temperature measurement device of claim 1, further comprising a metal housing, wherein the temperature detector further comprises a second signal line electrically connected between the temperature detection head and the first signal line, and wherein the metal housing is sleeved outside the temperature detection head and the second signal line.
4. The temperature measurement device of claim 3, further comprising a thermally conductive member disposed between the metal housing and the temperature detection head;
the heat conduction piece comprises heat conduction silica gel filled between the metal shell and the temperature detection head.
5. The temperature measurement device of claim 3 further comprising a flexible connection tube connected between the metal housing and the connector, the flexible connection tube encasing the shield, the energy drain, and the first signal line.
6. The temperature measurement device of claim 3 further comprising a first conductive member, one end of the shield member extending into the metal housing, the first conductive member being sandwiched between the shield member and an inner wall of the metal housing to electrically connect the metal housing and the shield member.
7. The device of claim 6, wherein the first conductive member is made of metal, and two opposite sides of the first conductive member are respectively attached to the inner wall of the metal casing and the outer surface of the shielding member, so that the first conductive member, the shielding member and the inner wall of the metal casing are tightly matched.
8. The temperature measuring device according to any one of claims 1 to 7, wherein the temperature detector further comprises a third signal line connected to an end of the first signal line remote from the temperature detecting head; the connector comprises a metal sleeve and a connector, the connector is positioned at one end of the metal sleeve far away from the temperature detection head, one end of the shielding piece extends into the metal sleeve, and the metal sleeve is sleeved outside the third signal wire;
the connector includes a first conductive portion and a second conductive portion insulated from each other; the first conductive part is electrically connected with the energy release piece, and the second conductive part is electrically connected with the third signal line.
9. The temperature measurement device of claim 8, wherein the first conductive portion is connected to a metal housing of the microwave cooking appliance.
10. The temperature measurement device of claim 8, wherein the connector further comprises a second conductive member sandwiched between the inner wall of the metal sleeve and the shield to electrically connect the metal sleeve and the shield.
11. The temperature measurement device of claim 10, wherein the second conductive member is made of metal, and two opposite sides of the second conductive member are respectively attached to the inner wall of the metal sleeve and the outer surface of the shielding member, so that the second conductive member, the shielding member and the inner wall of the metal sleeve are tightly matched.
12. A microwave cooking appliance comprising a microwave cooking appliance body and a temperature measuring device as claimed in any one of claims 1 to 11, the microwave cooking appliance comprising a metal housing and a microwave cavity located within the metal housing, a connector of the temperature measuring device being connected to the metal housing.
13. The microwave cooking appliance of claim 12 wherein a connection base is provided on the metal housing, the connection base being connected with a connector of the temperature measuring device;
the connecting seat comprises a connecting seat body and a connecting interface exposed out of the metal shell, wherein the connecting seat body is electrically connected with the metal shell, and the connecting interface is used for electrically connecting external equipment with a first signal wire of the temperature measuring device.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810274735.1A CN108261050B (en) | 2018-03-29 | 2018-03-29 | Temperature measuring device and microwave cooking utensil |
| PCT/CN2018/122183 WO2019184467A1 (en) | 2018-03-29 | 2018-12-19 | Temperature measuring device and microwave cooking appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810274735.1A CN108261050B (en) | 2018-03-29 | 2018-03-29 | Temperature measuring device and microwave cooking utensil |
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| Publication Number | Publication Date |
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| CN108261050A CN108261050A (en) | 2018-07-10 |
| CN108261050B true CN108261050B (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810274735.1A Active CN108261050B (en) | 2018-03-29 | 2018-03-29 | Temperature measuring device and microwave cooking utensil |
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| CN (1) | CN108261050B (en) |
| WO (1) | WO2019184467A1 (en) |
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| CN108261050B (en) * | 2018-03-29 | 2023-10-31 | 广东美的厨房电器制造有限公司 | Temperature measuring device and microwave cooking utensil |
| CN109813463A (en) * | 2019-03-20 | 2019-05-28 | 桂林市思奇通信设备有限公司 | Contact temperature-measuring device and its usage mode based on microwave heating equipment setting |
| CN114794581A (en) * | 2022-05-13 | 2022-07-29 | 海南摩尔兄弟科技有限公司 | Heating assembly and microwave heating device |
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| CN2786583Y (en) * | 2005-03-14 | 2006-06-07 | 佛山市美的日用家电集团有限公司 | Temperature examining equipment for microwave strong electromagnetic field and microwave heating |
| KR200434177Y1 (en) * | 2006-09-29 | 2006-12-18 | 주식회사 제임스텍 | A temperature sensing device for microwave range |
| KR20090071243A (en) * | 2007-12-27 | 2009-07-01 | 주식회사 대우일렉트로닉스 | Micro wave oven having refrigeration cycle and control method thereof |
| CN104913350A (en) * | 2015-06-29 | 2015-09-16 | 广东美的厨房电器制造有限公司 | Temperature measurement assembly for microwave equipment and microwave equipment with temperature measurement assembly |
| JP6597190B2 (en) * | 2015-10-30 | 2019-10-30 | 富士通株式会社 | Microwave irradiation device and exhaust purification device |
| CN108261050B (en) * | 2018-03-29 | 2023-10-31 | 广东美的厨房电器制造有限公司 | Temperature measuring device and microwave cooking utensil |
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2018
- 2018-03-29 CN CN201810274735.1A patent/CN108261050B/en active Active
- 2018-12-19 WO PCT/CN2018/122183 patent/WO2019184467A1/en active Application Filing
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| US3974696A (en) * | 1974-02-27 | 1976-08-17 | General Electric Company | Food thermometer for microwave oven |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2019184467A1 (en) | 2019-10-03 |
| CN108261050A (en) | 2018-07-10 |
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