CN207114613U - A kind of Electromagnetic Heating utensil and current sensing means - Google Patents
A kind of Electromagnetic Heating utensil and current sensing means Download PDFInfo
- Publication number
- CN207114613U CN207114613U CN201720283073.5U CN201720283073U CN207114613U CN 207114613 U CN207114613 U CN 207114613U CN 201720283073 U CN201720283073 U CN 201720283073U CN 207114613 U CN207114613 U CN 207114613U
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- sensing means
- current sensing
- precision resister
- resistance
- electromagnetic heating
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Abstract
The utility model discloses a kind of current sensing means and Electromagnetic Heating utensil applied to Electromagnetic Heating utensil, the current sensing means includes the precision resister being series in circuit-under-test and the voltage check device being connected in parallel with the precision resister.The precision resister is the resistance that resistance value error is less than 5%, and the resistance value error is the absolute value of difference and the percentage of nominal resistance of resistance actual resistance and nominal resistance.The voltage check device, for detecting the voltage of precision resister both sides.According to the electric current flowed through in the resistance of precision resister and the voltage counting circuit detected.The resistance value error of precision resister is small in current sensing means described in the utility model for Electromagnetic Heating utensil, uniformity is good, and install convenient.For the different Electromagnetic Heating utensils for being provided with above-mentioned current sensing means, the power error of its equal-wattage gear is small.
Description
Technical field
Current sensing means field is the utility model is related to, relates more specifically to a kind of electricity applied to Electromagnetic Heating utensil
Flow detection device and Electromagnetic Heating utensil.
Background technology
Existing frequently-used Electromagnetic Heating utensil such as electromagnetic oven, electric cooker and electric pressure cooking saucepan etc., one in its current sensing means
As use constantan wire as current detection sensor.Fig. 1 is constantan wire schematic diagram, as shown in figure 1, in use, constantan
The resistance value error of silk is larger, and its main cause is as follows：First, in the process of constantan wire, typically by cutting a fixed length
The constantan wire of degree controls resistance value, and when cutting constantan wire, length is difficult to control, and causes resistance error larger.Secondly as
Constantan wire needs to install on a printed circuit board, so needing to carry out clubfoot processing, when clubfoot is handled, certain journey to constantan wire
Cause constantan wire to damage on degree, cause resistance value error larger.Again, when constantan wire inserts printed circuit board, the depth of insertion
Shallow inconsistent, resistance value error is larger after also resulting in installation.Finally, the upper tin amount of constantan wire will also result in resistance value error compared with
Greatly.
In summary, due to current sensor of the constantan wire in as current sensing means resistance value in use
Error is larger, causes different Electromagnetic Heating utensils to be difficult to control in the actual power of equal-wattage gear, directly affects electromagnetism
Heat the performance of utensil.
Utility model content
To solve the above-mentioned problems in the prior art, the purpose of the application is to provide one kind and is applied to electromagnetic heater
The current sensing means of tool.
To achieve the above object, the one side of the application provides a kind of current detecting applied to Electromagnetic Heating utensil and filled
Put, the current sensing means includes the precision resister being series in circuit-under-test and company in parallel with the precision resister
The voltage check device connect.The precision resister is the resistance that resistance value error is less than 5%, and the resistance value error is resistance
The absolute value of the difference of actual resistance and nominal resistance and the percentage of nominal resistance.The voltage check device is high-precision for detecting
Spend the voltage of resistance both sides.
Preferably, the scope of the resistance value of the precision resister is 10 milliohms to 50 milliohms.
It is highly preferred that the resistance value of the precision resister is 10 milliohms.
Preferably, the scope of the power of the precision resister is 1 watt to 5 watts.
It is highly preferred that the power of the precision resister is 5 watts.
Preferably, the precision resister is manganese-nickel resistance.
Preferably, the precision resister is manganin resistance.
Preferably, the resistance value error of the precision resister is less than 1%.
Preferably, the precision resister is that high-precision current detects special resistors.
Preferably, the current sensing means also includes processing unit, and the processing unit receives the voltage detecting dress
The signal of the expression magnitude of voltage detected is put, and according to the resistance of the precision resister, by the expression magnitude of voltage detected
Signal is converted to the signal for representing current value in circuit-under-test by computing.
Preferably, the current sensing means also includes display device, and it is defeated that the display device receives the processing unit
The signal of the expression current value gone out, and current value is shown.
Further aspect of the application provides a kind of Electromagnetic Heating utensil, and the Electromagnetic Heating utensil includes above-mentioned electric current
Detection means.
In the herein described current sensing means for Electromagnetic Heating utensil the resistance value error of precision resister it is small, one
Cause property is good, and install convenient.For the different Electromagnetic Heating utensils for being provided with above-mentioned current sensing means, its identical work(
The power error of rate gear is small.
Brief description of the drawings：
Fig. 1 is the schematic diagram of the constantan wire used in the prior art；
Fig. 2 is illustrated according to the circuit of the current sensing means applied to Electromagnetic Heating utensil of presently filed embodiment
Figure；And
Fig. 3 be according to the another embodiment of the application be applied to Electromagnetic Heating utensil include processing unit and aobvious
The circuit diagram of the current sensing means of showing device.
Description of reference numerals：
The voltage check device of 1 precision resister 2
The processing unit of 3 circuit-under-test 4
5 display devices
Embodiment
Specific embodiment of the present utility model is described in detail below in conjunction with accompanying drawing, it should be appreciated that herein
Described embodiment is merely to illustrate and explained the utility model, is not limited to the utility model.
Fig. 2 is the circuit diagram of the current sensing means applied to Electromagnetic Heating utensil.As shown in Fig. 2 in the application
An embodiment in, there is provided a kind of current sensing means applied to Electromagnetic Heating utensil, the current sensing means
Including precision resister 1 and voltage check device 2.Precision resister 1 is series in circuit-under-test 3, voltage check device 2 and height
Accuracy resistance 1 is in parallel.
In the embodiment of the application, the precision resister can be the electric current that resistance value error is less than 5%
Special resistors (CSR resistance) are detected, in the embodiment that the application is more highly preferred to, the precision resister can be resistance value
Error is less than 1% current detecting special resistors.
In the embodiment of the application, the preferred resistance value scope of the precision resister is 10 milliohms to 50 millis
Europe, in the embodiment that the application is more highly preferred to, the resistance value of the precision resister is 10 milliohms.
In the embodiment of the application, the preferable power bracket of precision resister is 1 watt to 5 watts,
In the embodiment that the application is more highly preferred to, the power of the precision resister is 5 watts.
In one embodiment of the application, the material of the precision resister can be manganese-nickel.
In another embodiment of the application, the material of the precision resister can be manganin.
It is used to detect precision resister both sides voltage, the voltage detecting with the shunt voltage detection means 2 of precision resister 1
Device 2 can be a device or circuit for including voltage sensor, and the voltage sensor can be detected in circuit-under-test 3
Voltage.
By above-mentioned current sensing means, the electricity detected according to the resistance value of precision resister 1 and voltage check device 2
Pressure, by Ohm's law, you can calculate the electric current to be measured in circuit-under-test 3.
In another embodiment of the application, as shown in figure 3, the current sensing means include precision resister 1,
Voltage check device 2, processing unit 4 and display device 5, the voltage check device 2 can be one and possess voltage detecting work(
The device or circuit of energy, the processing unit 4 can receive the signal for the expression magnitude of voltage that the voltage check device detects,
And according to the resistance value of precision resister, the signal of the expression magnitude of voltage detected is converted into expression circuit-under-test by computing
The signal of current value in 3, the last processing unit 4 show the signal for representing current value by the display device 5.
Correspondingly, presently filed embodiment also provides a kind of Electromagnetic Heating utensil, and the Electromagnetic Heating utensil includes above-mentioned
Current sensing means.The Electromagnetic Heating utensil can be such as electromagnetic oven, electric cooker and electric pressure cooking saucepan.
In the herein described current sensing means for Electromagnetic Heating utensil the resistance value error of precision resister it is small, one
Cause property is good, and install convenient.For the different Electromagnetic Heating utensils for being provided with above-mentioned current sensing means, its identical work(
The power error of rate gear is small.
A preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, still, however it is not limited to appeal
Detail in embodiment., can be to the technical solution of the utility model in range of the technology design of the present utility model
A variety of simple variants are carried out, these simple variants belong to the scope of protection of the utility model.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is to each
The possible combination of kind no longer separately illustrates.
In addition, it can also be combined between a variety of embodiments of the present utility model, as long as it is not disobeyed
Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Claims (12)
1. a kind of current sensing means applied to Electromagnetic Heating utensil, it is characterised in that the current sensing means includes：
The precision resister (1) being series in circuit-under-test, the precision resister (1) are the electricity that resistance value error is less than 5%
Resistance；And
The voltage check device (2) being connected in parallel with the precision resister (1), for detecting precision resister (1) both sides
Voltage.
2. current sensing means according to claim 1, it is characterised in that the resistance value of the precision resister (1)
Scope is 10 milliohms to 50 milliohms.
3. current sensing means according to claim 2, it is characterised in that the resistance value of the precision resister (1) is
10 milliohms.
4. current sensing means according to claim 1, it is characterised in that the model of the power of the precision resister (1)
Enclose for 1 watt to 5 watts.
5. current sensing means according to claim 4, it is characterised in that the power of the precision resister (1) is 5 watts
It is special.
6. current sensing means according to claim 1, it is characterised in that the precision resister (1) is manganese-nickel
Resistance.
7. current sensing means according to claim 1, it is characterised in that the precision resister (1) is manganin
Resistance.
8. current sensing means according to claim 1, it is characterised in that the resistance value of the precision resister (1) is missed
Difference is less than 1%.
9. current sensing means according to claim 1, it is characterised in that the precision resister (1) is high precision electro
Stream detection special resistors.
10. current sensing means according to claim 1, it is characterised in that the current sensing means also includes processing
Device (4), the signal for the expression magnitude of voltage that processing unit (4) reception voltage check device (2) detects, and according to
The resistance value of the precision resister (1), the signal of the expression magnitude of voltage detected is converted into the tested electricity of expression by computing
The signal of current value in road (3).
11. current sensing means according to claim 10, it is characterised in that the current sensing means also includes display
Device (5), the display device (5) receive the signal of the expression current value of processing unit (4) output, and by the electric current
Value is shown.
12. a kind of Electromagnetic Heating utensil, it is characterised in that the Electromagnetic Heating utensil is included according to any in claim 1-11
Current sensing means described in one claim.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720283073.5U CN207114613U (en) | 2017-03-22 | 2017-03-22 | A kind of Electromagnetic Heating utensil and current sensing means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720283073.5U CN207114613U (en) | 2017-03-22 | 2017-03-22 | A kind of Electromagnetic Heating utensil and current sensing means |
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| Publication Number | Publication Date |
|---|---|
| CN207114613U true CN207114613U (en) | 2018-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720283073.5U Active CN207114613U (en) | 2017-03-22 | 2017-03-22 | A kind of Electromagnetic Heating utensil and current sensing means |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596198A (en) * | 2020-05-25 | 2020-08-28 | 上海岱矽集成电路有限公司 | Electric leakage test method for integrated circuit |
-
2017
- 2017-03-22 CN CN201720283073.5U patent/CN207114613U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111596198A (en) * | 2020-05-25 | 2020-08-28 | 上海岱矽集成电路有限公司 | Electric leakage test method for integrated circuit |
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