CN202234702U - Electric cookware - Google Patents
Electric cookware Download PDFInfo
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- CN202234702U CN202234702U CN2011201799371U CN201120179937U CN202234702U CN 202234702 U CN202234702 U CN 202234702U CN 2011201799371 U CN2011201799371 U CN 2011201799371U CN 201120179937 U CN201120179937 U CN 201120179937U CN 202234702 U CN202234702 U CN 202234702U
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- cooking utensil
- heating cooking
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Abstract
The utility model discloses an electric cookware, comprising a body with a cooking cavity, a temperature change detecting element and a temperature control circuit, wherein the temperature change detecting element is a positive-temperature-coefficient thermistor which is printed on the surface of a base material by a printing mode. Compared with the electric cookware in the prior art, the electric cookware disclosed by the utility model uses the PTC thermistor to control the temperature, the resistance increases along the rise of the temperature and changes in a line, the linearity is good, the reaction speed is fast, the reaction speed after an insulating layer is printed can still reach to be within 2 seconds, the flexibility is high, the accurate temperature control in the true sense can be realized, and the voltage control is accurate. According to the electric cookware, the total cost of the PTC thermistor can be greatly reduced by a printing mode, and the advantages of the printing mode lie in that the process is simplified; and the electric cookware can be manufactured by adopting a simple silk-printing process, simultaneously can realize insulation without influence on the accuracy of the temperature measurement by printing a thin insulating layer and is more beneficial to large-scale mass production.
Description
Technical field
The utility model belongs to the temperature control technology of electric-heating cooking utensil.
Background technology
The control of the thermometric of electric cooking appliance is mainly carried out temperature control through a NTC thermistor is set at cap in the prior art, and its way of realization sees shown in the accompanying drawing 1 that the NTC thermistor is generally by glass 2 ' encapsulation; Overcoat one insulating sleeve 3 ', two ends draw lead 4 ', overall package in the metallic sheath 5 of end sealing ' in; The blind end of metallic sheath stretches into pot cover; Metallic sheath passes to the NTC thermistor with the vapor (steam) temperature in the pot, and the thermistor resistance changes, again through chip microcontroller control; For conducting heat evenly, the NTC thermistor needs filling heat-conductive silicone grease 6 in metallic sheath ' to realize the uniformity of heat transfer toward contact when encapsulation.
The NTC thermistor carries out temperature control, and it has following shortcoming:
1.NTC thermistor is a negative temperature coefficient, its resistance raises with temperature and reduces, and it is changed to non-linear, the control difficulty, and accuracy is not high.
2.NTC the reaction speed of thermistor is slow; Its response lag in not being packaged in metallic sheath the time has reached more than 5 seconds, and existing electric cooking appliance is generally liquid heater, and the NTC thermistor can not be realized insulating fully; It is at glass packages external demand overcoat one insulating sleeve; Be inserted in again in the metallic sheath of end sealing, could realize directly detecting vapor (steam) temperature in the pot, because the insulating sleeve poor thermal conductivity; And its heat conduction still is delivered to metallic sheath through vapor (steam) temperature in the pot and passes to the NTC thermistor again and control; Reaction speed when causing its practice seriously lags behind, and reaches more than 15 seconds, can not realize accurate control truly to vapor (steam) temperature in the pot.
3. the existing NTC thermistor that adopts is generally glass-encapsulated, and it is being installed, and all is prone to damage when use or transportation; As breakage occurring, and product is not implemented full inspection, then can cause control problem occurring behind the product export during installation; Bring influence to consumer's use; In a single day occur breakage when especially using and cause change in resistance big, uncontrollable, possibly also can bring threat to consumer's safety.
4. existing NTC thermistor composition is generally the metal oxide mixed sintering and forms, because the control temperature of different electric cooking appliance product needed is different, precision is different (to comprise the stage control accuracy; For example the resistance of electric pressure cooking saucepan product requirement about 100 degree is comparatively accurate; And the resistance of electric cooker product requirement about 90 degree is comparatively accurate), and for nonlinear NTC thermistor, its manufacturing firm must must not control according to different product and require to carry out sample making; Its versatility is not extensive; Simultaneously, the control of stage precision requires to cause NTC thermistor its qualification rate when manufacturing a product also lower, is generally about 80%.
5. electric cooking appliance adopts the NTC thermistor component, and manufacture craft is more numerous and diverse, and metallic sheath is generally turning processing; Operation is more, and cost is higher, is that a sealing deep hole is so that the NTC thermistor inserts in the middle of the metallic sheath; For guaranteeing good contact to guarantee heat transfer, the aperture can only be slightly larger than NTC thermistor size, causes difficulty when inserting; Hole depth is also deep; Often can only confirm whether the NTC thermistor puts in place, causes a lot of finished products in fact all to exist the NTC thermistor not to be in place, and control goes wrong when inserting thermistor with sensation.The NTC thermistor needs the uniformity of filling heat-conductive silicone grease to realize conducting heat in metallic sheath toward contact when encapsulation, NTC thermistor overall package also need be fixed or sealing behind metallic sheath.To guarantee that the NTC thermistor the moving influence resistance can not occur; Guarantee its sealing simultaneously; Whole assembling procedure is very numerous and diverse and qualification rate is lower, most of product short-term post sales just occur control problem often since thermistor component partly go wrong.
The temperature control of electric-heating cooking utensil is particularly crucial, and particularly for the electric pressure cooking saucepan product, pressing back corresponding temperature and pressure dependence on it is 1 degree/5kPa, and the pressure error that the deviation of temperature is brought is very big, and safety of products is brought threat.
The consistent temperature control technology that can substitute the NTC resistor of seeking of those skilled in the art.The PTC thermistor is the abbreviation of Positive Temperature Coefficient; The meaning is positive temperature coefficient, and PTC is meant semistor usually, is the semiconductor resistor that the typical case has temperature sensitivity; When surpassing uniform temperature; Its resistance value is along with the rising of temperature is increasing of step performance, and PTC is used in body pipe temperature-compensation circuit, measuring and controlling temp circuit, the overheating protection circuit more in the prior art, but prior art PTC thermistor also is to be encapsulated in the pipe; Existence is complicated with sampling technology, the defective that temperature measurement error is big.
The utility model content
The electric-heating cooking utensil that the essential technique problem that the utility model is intended to solve is to provide a kind of and can responds fast, processing cost is low, be more conducive to scale of mass production, sealing reliability is good.
To above essential technique problem, the corresponding technical solution scheme of the utility model is:
A kind of electric-heating cooking utensil comprises the body, temperature change detection element and the temperature-adjusting circuit that have cooking cavity, it is characterized in that temperature change detection element is a semistor, and said semistor is printed in substrate surface through mode of printing.Semistor (PTC thermistor) is a kind of semiconductor resistor of tool temperature sensitivity, is made up of semiconductor ceramic material, and the principle of utilization is that temperature causes resistance variations.If the concentration in electronics and hole is respectively n, p; Mobility is respectively μ n, μ p; Then semi-conductive electricity is led to: σ=q (n μ n+p μ p) because n, p, μ n, μ p are the functions of temperature dependent T, is the function of temperature so electricity is led, therefore can be by measuring that electricity is led and the height that extrapolate temperature; And can make the resistance-temperature characteristics curve. according to temperature characteristics, draw the relation of temperature and resistance and then obtain temperature value.
For cutting down finished cost, realize temperature detection in the wide zone, the base material of temperature change detection element described in the utility model electric-heating cooking utensil is the perisporium of cooking cavity.Semistor is printed in the perisporium of cooking cavity through mode of printing like this, can both simplify like inwall or outer wall and install and processing cost.
Said temperature change detection element is located at the position that the ability detected temperatures changes on the electric-heating cooking utensil.The position that the ability detected temperatures changes is as being installed on the perisporium of electric-heating cooking utensil cap or cooking cavity.
Further, the base material of said temperature change detection element is a metal or nonmetal.Temperature change detection element is for comprising thermistor and base material, and the thermistor slurry with ptc characteristics is printed at metal or nonmetallic surface through mode of printing.
Be the security of protection temperature change detection element, temperature change detection element also has the insulating barrier that covers on it, and when base material was metal, insulating barrier was between semistor and base material or in the both side surface of semistor; When base material was or is nonmetal, insulating barrier covered the opposite side surface of semistor.PTC thermistor skin is printed with insulating barrier through mode of printing, because the PTC thermistor is a positive temperature coefficient, its resistance increases with the rising of temperature; It is changed to linearity, and reaction speed is fast, and its reaction speed behind the printing insulating barrier still can reach in 2 seconds; Can reduce the cost of PTC thermistor simultaneously through the mode of printing greatly, be more conducive to scale of mass production, realize insulation through the mode of printing insulating barrier; Its thickness of insulating layer is very thin, does not influence heat transfer rate basically, but simple realization insulation and sealing again simultaneously; Insulation costs is low, and sealing reliability is good.
Said temperature change detection element communicates with the steam that electric-heating cooking utensil takes place.The interior vapor (steam) temperature of direct detection pot is also controlled.
Said semistor communicates with the steam that electric-heating cooking utensil takes place; Perhaps base material communicates with the steam that electric-heating cooking utensil takes place.
When the base material of temperature change detection element is the perisporium of cooking cavity, semistor is printed in the madial wall or the lateral wall of cooking cavity through mode of printing.
As a kind of embodiment, consider in steam that electric-heating cooking utensil produces or the pot to have oil or soda acid, insulating barrier is required too high situation.The insulating barrier side of said semistor is connected with a heat-conducting metal again, and the steam that this heat-conducting metal and electric-heating cooking utensil take place communicates or is attached at the perisporium of cooking cavity.Realize conducting heat through increasing a heat-conducting medium (metal); Make simultaneously insulating barrier can not occur the insulation or corrosion resistance do not reach requirement); Semistor is controlled through detecting the metal temperature variation; The PTC thermistor is close to this metal through the way of contact, and the PTC thermistor is controlled through detecting the metal temperature variation.
Said electric-heating cooking utensil is electric cooker, electric pressure cooking saucepan, kettle, saucepan, soy bean milk making machine, baking tray or deep fryer.
Compare the prior art electric-heating cooking utensil, the utility model beneficial effect is following:
1.PTC thermistor is a positive temperature coefficient, its resistance raises with temperature and increases, and linearly changes; Good linearity, reaction speed is fast, and its reaction speed behind the printing insulating barrier still can reach in 2 seconds; Highly sensitive, can realize the accurate temperature controlling of real meaning, pressure control is accurate.
2. can reduce the whole cost of PTC thermistor greatly through mode of printing; The advantage of mode of printing just is the simplification of its technology; It adopts simple silk screen printing process just can make, and it just can realize insulation through the very thin insulating barrier of printing simultaneously, does not also influence the precision of its thermometric simultaneously; This is that conventional PTC resistor can't be realized, conventional PTC resistor is the complicated assembly structure of basically identical with the version of NTC resistor.The utility model is more conducive to scale of mass production.
3. will be printed at metal or nonmetallic surface through mode of printing through mode of printing, its technology is simple, and process controllability is good, and printing back resistance is accurate, and surperficial scratch resistance wearability is good, when installing and using, is not prone to damage.
4. because the PTC thermistor is a positive temperature coefficient, and its resistance increases with the rising of temperature, it is changed to linearity; Its production and processing is simple; The resistance high conformity, interchangeability is strong, profile, specification standardization; Can be made as standard component and apply to different product, and can not be subject to the requirement of the resistance and the stage control accuracy of different product.
5. through mode of printing the PTC thermistor is printed at metal or nonmetallic surface; Its need get final product metal that prints or nonmetal simple fixation in the position of the easy detected temperatures of electric-heating cooking utensil; It does not receive the influence of assembling process, variety of issue in the time of the assembling of NTC thermistor can not occurring.
6. the PTC thermistor of differential responses can also be cascaded; Carry out the temperature protection of difference; Like this can so that as: parts such as electronics, electrical equipment play the protection of most economical most excellent in the different temperatures stage, and the NTC thermistor can't be realized series connection control.
Description of drawings
Fig. 1 is a prior art NTC resistor-junction composition.
Fig. 2-1, Fig. 2-2, Fig. 2-3 and Fig. 2-4 are several kinds of forms of the utility model detector unit.
Fig. 3 is the overall structure sketch map of the utility model electric-heating cooking utensil embodiment 1.
Fig. 4 is the enlarged drawing at Fig. 3 A place.
Fig. 5 is the utility model PTC printed resistor sketch map.
Fig. 6 is the overall structure sketch map of the utility model electric-heating cooking utensil embodiment 2.
Fig. 7 is the enlarged drawing at Fig. 6 B place.
Fig. 8-the 15th, the structural representation of embodiment 3-10.
Figure 16 and Figure 17 are the detection schematic diagrams of embodiment 1.
The specific embodiment
Below through the utility model technical scheme being done further description with reference to accompanying drawing:
The temperature change detection element of the electric-heating cooking utensil of the utility model is a semistor, and semistor is printed in substrate surface through mode of printing.Said typography is the silk screen printing process of prior art.Version is shown in Fig. 2-1, Fig. 2-2, Fig. 2-3 and Fig. 2-4, and semistor 1 one sides are printed with insulating barrier 3 among Fig. 2-1, and overall printing is in base material 2 surfaces again, and base material is a metal base, can be selected from aluminium flake stainless steel sheet metals such as (304,403).Temperature change detection element among Fig. 2-2, different with Fig. 2-1 is that temperature coefficient thermistor 1 an other side also is printed with insulating barrier 3.
Semistor 1 is printed in base material 2 surfaces among Fig. 2-3, and base material is a non-metallic substrate, and said non-metallic substrate can be glass, pottery, plastics or glaze or enamel base material.
What temperature change detection element was different with Fig. 2-3 among Fig. 2-4 is also to be printed with insulating barrier 3 at semistor 1 another side.
Fig. 3-electric-heating cooking utensil shown in Figure 5 is an electric pressure cooking saucepan; Include mainly pot body and the pot cover that constitutes by outer pot 5, interior pot 4 and be arranged on pot body with interior pot between electrical pressure cooker control circuit plate 8, said pot cover includes pot inner cap 6 and fixing each parts middle 7.
The Connection Block 8 of one tubbiness is set on the middle seat 7; Connection Block 8 is vertical to be inserted in the through hole of pot covers and stretches in the pot; Semistor 1 is printed on the base material 2 and formation temperature changes detecting element, and at the skin printing insulating barrier of semistor 1, semistor is also compound by electrode slice 9; Electrode slice is electrically connected with the temperature signal line; The temperature signal line is processed by flexible wire, is used to be connected to circuit control panel, and electrode slice can select conducting metals such as copper, nickel, gold, silver to process.
A spring 10 is installed in base material 2 upper ends, and an end of spring withstands on the internal boss of pot cover loam cake, and spring 10 is used for base material compressed with Connection Block and contacts; Can also be provided with the rubber o-ring 11 that is used to seal on the Connection Block; Semistor 1 communicates with the interior steam of pot through the hollow steam channel of Connection Block, thereby directly accurately detects kettle temperature, when kettle temperature raises; The resistance of semistor increases thereupon; Controller carries out the accurate control of kettle temperature through the change in resistance of semistor, and security reliability is good, and control accuracy is high.
The test of present embodiment temperature change detection element:
(1) testing goal: measure semistor and under 25 ℃ of room temperature conditions, suddenly change to 85 ℃ of water temperatures the sensor response time.
(2) testing equipment: voltage data Acquisition Instrument, dc source.
(3) testing element: (logical embodiment 1 is made for NTC temperature sensor and semistor.)
(4) test philosophy of NTC temperature sensor is seen Figure 16, test condition, Vcc=4.98BV, R=25k, RTNC=108K (23 ℃).
Data collecting instrument is gathered voltage vcc and Vs respectively in 23 ℃ of room temperatures and 87 ℃ of water temperatures, frequency acquisition is 0.1S/ time, and NTC is in 23 ℃ and 87 ℃ of water temperatures.
Semistor, a side is exposed, and opposite side is sealed in a little cavity, prevents that temperature from passing to the back side, and heat passes to the semistor temperature-sensitive through the ceramic substrate of 0.38mm, and temperature-measurement principle is seen Figure 17.Test condition, Vcc=4.07V, R=1.36k, R
PTC=664 ohm of K (23 ℃).
Data collecting instrument is gathered voltage vcc and Vs respectively in 23 ℃ of room temperatures and 85 ℃ of water temperatures, frequency acquisition is 0.1S/ time, and semistor is in 23 ℃ and 87 ℃ of water temperatures.
The test result partial data sees attached list 1
The process Performance Detection:
(1) maximum operation (service) temperature that can bear of semistor: 550 ℃.
(2) temperature coefficient (TCR): showing as on the ESL4924 dielectric+4400ppm/ ℃ of (resistance when the benchmark resistance is 25 ℃) (temperature coefficient on ceramic substrate tested).
(3) the temperature coefficient linearity: in 25 ℃～175 ℃ intervals, the temperature coefficient of actual test is+4400 ± 100ppm/ ℃.
(4) 25 ℃ of static resistance accuracies: ± 1% (can reach ± 0.5).
Fig. 6 and electric-heating cooking utensil shown in Figure 7, different with embodiment 1 is, semistor 1 is installed in Connection Block 8 hollow cavities end near the pot inner cap; Connection Block 8 belows have convex shoulder upwards; Semistor 1 is installed on the convex shoulder, and semistor 1 is provided with sealing ring 11 with the convex shoulder contact-making surface, and semistor 1 is arranged on the end near the pot inner cap; The steam distance is short, and it is more accurate sooner to detect.
Embodiment 3-embodiment 10
Embodiment illustrated in fig. 83 semistor 1 (PTC thermistor) is printed on the base material 2, and base material 2 is a metal, and insulating barrier 3 is all printed in semistor 1 both sides; Be installed in the perisporium of electric-heating cooking utensil cooking cavity then; Preferred illustrated top position, semistor 1 are in the side near the electric-heating cooking utensil cooking cavity, and temperature coefficient thermistor 1 is positioned at the below; Can directly detect vapor (steam) temperature in the cooking cavity 12, carry out accurate temperature controlling.
4 semistors 1 embodiment illustrated in fig. 9 (PTC thermistor) are printed on the base material 2, and base material 2 is a metal, and base material is in the side near the electric-heating cooking utensil cooking cavity, detect the kettle temperature trip temperature control of going forward side by side through the temperature that detects metal base.
Embodiment illustrated in fig. 10 5, semistor 1 (PTC thermistor) is printed on the base material 2, and base material 2 is nonmetal; 3 protections of semistor 1 opposite side printing insulating barrier; Be installed in the top position of electric-heating cooking utensil cooking cavity then, semistor 1 is in the side near the electric-heating cooking utensil cooking cavity, and temperature coefficient thermistor 1 is positioned at the below; Can directly detect vapor (steam) temperature in the cooking cavity 12, carry out accurate temperature controlling.
6 semistors 1 embodiment illustrated in fig. 11 (PTC thermistor) are printed on the base material 2, and base material 2 is nonmetal, and base material is in the side near the electric-heating cooking utensil cooking cavity, detect the kettle temperature trip temperature control of going forward side by side through the temperature that detects metal base.
Embodiment illustrated in fig. 12 7; Semistor 1 (PTC thermistor) is printed on the base material 2; Base material 2 is the cooking cavity wall, that is to say that semistor 1 directly is printed on the cooking cavity outer wall, detects the kettle temperature trip temperature of going forward side by side through the temperature that detects metal base.Also can embodiment 8 shown in figure 13 semistor 1 directly be printed on the cooking cavity inwall, can directly detect the go forward side by side accurate control of trip temperature of vapor (steam) temperature in the cooking cavity.
Embodiment illustrated in fig. 13 9 can be close to cooking cavity 12 outer walls through contact, bonding etc. with detector unit, carry out temperature through the variations in temperature that detects the cooking cavity outer wall and accurately control.Detector unit can be shown in Fig. 2-1, Fig. 2-2, Fig. 2-3 and Fig. 2-4 several kinds of forms.
10 detector units embodiment illustrated in fig. 14 are connected with thermal conductivity heat-conducting metal layer 13 preferably; Heat-conducting metal layer 13 can be copper or silver layer etc.; Heat-conducting metal layer 13 communicates with the interior steam of pot; The PTC thermistor is controlled through detecting heat-conducting metal layer 13 variations in temperature, also can be close to the outer wall of cooking cavity through the way of contact, controls through the variations in temperature that detects heat-conducting metal layer; Accurately obtain kettle temperature through heat-conducting metal is convenient, design ingenious, simple in structure, low cost of manufacture.
In sum; After those of ordinary skill in the art reads the utility model file; Need not creative mental labour according to the technical scheme of the utility model and technical conceive and make other various corresponding conversion scheme, all belong to the scope that the utility model is protected.
Claims (10)
1. electric-heating cooking utensil; Comprise the body, temperature change detection element and the temperature-adjusting circuit that have cooking cavity; It is characterized in that temperature change detection element is a semistor, said semistor is printed in substrate surface through mode of printing.
2. according to claims 1 described electric-heating cooking utensil, the base material that it is characterized in that temperature change detection element is the perisporium of cooking cavity.
3. according to claims 1 described electric-heating cooking utensil, it is characterized in that said temperature change detection element is located at the position that the ability detected temperatures changes on the electric-heating cooking utensil.
4. according to claims 1 described electric-heating cooking utensil, the base material that it is characterized in that temperature change detection element is a metal or nonmetal.
5. according to the described electric-heating cooking utensil of one of claims 1-4, it is characterized in that temperature change detection element also has the insulating barrier that covers on it, when base material was metal, insulating barrier was in the both side surface of semistor; When base material when being nonmetal, insulating barrier covers the opposite side surface of semistor.
6. according to the said electric-heating cooking utensil of claim 5, it is characterized in that said temperature change detection element communicates with the steam that electric-heating cooking utensil takes place.
7. according to the said electric-heating cooking utensil of claim 6, it is characterized in that said semistor communicates with the steam that electric-heating cooking utensil takes place; Perhaps base material communicates with the steam that electric-heating cooking utensil takes place.
8. according to the said electric-heating cooking utensil of claim 5, the base material that it is characterized in that temperature change detection element is the perisporium of cooking cavity, and semistor is printed in the madial wall or the lateral wall of cooking cavity through mode of printing.
9. according to the said electric-heating cooking utensil of claim 5, it is characterized in that the insulating barrier side of said semistor is connected with a heat-conducting metal again, the steam that this heat-conducting metal and electric-heating cooking utensil take place communicates or is attached at the perisporium of cooking cavity.
10. according to the said electric-heating cooking utensil of claim 1, it is characterized in that said electric-heating cooking utensil is electric cooker, electric pressure cooking saucepan, kettle, saucepan, soy bean milk making machine, baking tray or deep fryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201799371U CN202234702U (en) | 2011-05-30 | 2011-05-30 | Electric cookware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201799371U CN202234702U (en) | 2011-05-30 | 2011-05-30 | Electric cookware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202234702U true CN202234702U (en) | 2012-05-30 |
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ID=46096025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201799371U Expired - Lifetime CN202234702U (en) | 2011-05-30 | 2011-05-30 | Electric cookware |
Country Status (1)
| Country | Link |
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| CN (1) | CN202234702U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102450944A (en) * | 2011-05-30 | 2012-05-16 | 浙江苏泊尔家电制造有限公司 | Electrothermal cooker |
| CN103211490A (en) * | 2013-05-09 | 2013-07-24 | 白雪 | Intelligent control type cookware |
| CN109452885A (en) * | 2017-09-06 | 2019-03-12 | 广东美的生活电器制造有限公司 | Chassis assembly, stirring cup assembly and food cooking machine |
| CN112842331A (en) * | 2020-12-30 | 2021-05-28 | 广东蚬壳家电有限公司 | Oximeter and blood oxygen concentration measuring method |
-
2011
- 2011-05-30 CN CN2011201799371U patent/CN202234702U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102450944A (en) * | 2011-05-30 | 2012-05-16 | 浙江苏泊尔家电制造有限公司 | Electrothermal cooker |
| CN103211490A (en) * | 2013-05-09 | 2013-07-24 | 白雪 | Intelligent control type cookware |
| CN109452885A (en) * | 2017-09-06 | 2019-03-12 | 广东美的生活电器制造有限公司 | Chassis assembly, stirring cup assembly and food cooking machine |
| CN112842331A (en) * | 2020-12-30 | 2021-05-28 | 广东蚬壳家电有限公司 | Oximeter and blood oxygen concentration measuring method |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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Granted publication date: 20120530 |