CN101532884B - A coffee machine instant heating type heating body temperature measurement method - Google Patents
A coffee machine instant heating type heating body temperature measurement method Download PDFInfo
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- CN101532884B CN101532884B CN2009103010127A CN200910301012A CN101532884B CN 101532884 B CN101532884 B CN 101532884B CN 2009103010127 A CN2009103010127 A CN 2009103010127A CN 200910301012 A CN200910301012 A CN 200910301012A CN 101532884 B CN101532884 B CN 101532884B
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- temperature sensor
- temperature
- heating body
- heating type
- type heating
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Abstract
The invention relates to a coffee machine instant heating type heating body temperature measurement method, including an one-chip computer, and a temperature sensor connected to the one-chip computer and installed on the instant heating type heating body water outlet position, and a ground resistance and capacitance connected to the temperature sensor, wherein, the other end of the temperature sensor is connected to a power supply VCC. The one-chip computer detects the (t-1) at a fixed time interval for subtracting, to obtain the temperature (t-1) of the temperature sensor; multiplies the temperature change rate of the temperature sensor R1 with the thermal conductivity coefficient k, so as to calculate the temperature sensor (t-1), finally obtaining the heating T = k*(TS (t-1)). The invention has positive effect of adopting simple hardware structure and having low hardware cost, and capability of obtaining better temperature effect when the temperature sensor has obvious time lag effect and the thermal conductivity effect is not good between the temperature sensor and the heating body.
Description
Technical field
The present invention relates to the temperature checking method of the instant heating type heating body of coffee making apparatus.
Background technology
Influencing the important elements of coffee quality, is exactly the temperature of hot water.Generally adopt powerful instant heating type heating body to carry out the hot water heating at present, and at the position laying temperature sensor near rising pipe.This calandria has that heating power is big, and the characteristics that thermal capacity is little heat water to excessive temperature easily, cause coffee taste bitter excessively, even the smell of burning is arranged.A very important input parameter is exactly the calandria temperature in the heat control and add; but because be in the purpose of protection temperature sensor; sleeve pipe in a Teflon of parcel, temperature sensor surface; its consequence has influenced heat-conducting effect exactly, makes between temperature sensor and the calandria temperature to have time-lag effect.
Summary of the invention
The present invention seeks to stickiness problem when solving that temperature exists between temperature sensor and the calandria, utilize simple hardware construction and cheap hardware cost, accurately calculate the calandria temperature, thereby accurately control the calandria temperature.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of thermometry of coffee machine instant heating type heating body, comprise the single-chip microcomputer of carrying out detection algorithm, the temperature sensor R1 that is installed in instant heating type heating body water delivering orifice position and links to each other with described single-chip microcomputer, the described temperature sensor R1 other end connects power supply VCC, also comprises the stake resistance R2 and the capacitor C 1 that are connected with described temperature sensor R1.Described single-chip microcomputer detects the temperature T of described temperature sensor R1 every the set time
S(t), with the temperature T of preceding one-shot measurement
S(t-1) subtract each other, obtain the rate of temperature change T of described temperature sensor R1
S(t)-T
S(t-1); With the rate of temperature change of described temperature sensor R1, multiply by heat-conduction coefficient k, can calculate the temperature difference △ T=k * (T of described temperature sensor R1 and described calandria
S(t)-T
S(t-1)), finally obtain the temperature T of described calandria
B=T
S(t)+k * (T
S(t)-T
S(t-1)).
The resistance of described temperature sensor R1 varies with temperature, and stake resistance R2 is accurate fixed resistance, and therefore described single-chip microcomputer just can calculate the temperature T of described temperature sensor R1 by AD transition detection port voltage
S(t).
Described temperature T
S(t) be the current detection temperature, described temperature T
S(t-1) be a preceding detected temperatures.
Description of drawings
Fig. 1 is the temperature measuring circuit schematic diagram of coffee machine instant heating type heating body;
Fig. 2 is the temperature computation block diagram of coffee machine instant heating type heating body.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
With reference to Fig. 1, Fig. 2, a kind of thermometry of coffee machine instant heating type heating body, comprise the single-chip microcomputer 1 of carrying out detection algorithm, the temperature sensor R1 that is installed in instant heating type heating body water delivering orifice position and links to each other with described single-chip microcomputer 1, the described temperature sensor R1 other end connects power supply VCC, also comprises the stake resistance R2 and the capacitor C 1 that are connected with temperature sensor.
After described power supply VCC described temperature sensor R1 of process and the described stake resistance R2 dividing potential drop, connect the AD mouth of described single-chip microcomputer 1, described capacitor C 1 is carried out filtering.The resistance of described temperature sensor R1 varies with temperature, and stake resistance R2 is accurate fixed resistance, and therefore described single-chip microcomputer 1 just can calculate the temperature T of described temperature sensor R1 by AD transition detection port voltage
S(t).
But because relations such as gap or insulating material, described temperature sensor R1 can not directly react the actual temperature of described calandria, particularly carries out in the high-power heating process, and described calandria temperature variation is violent, both temperature difference are big especially, had a strong impact on actual temperature control effect.Therefore adopt the rate of temperature change of described temperature sensor R1 to calculate the calandria method of temperature.
Described single-chip microcomputer 1 detects the temperature T of described temperature sensor R1 every the set time
S(t), with the temperature T of preceding one-shot measurement
S(t-1) subtract each other, obtain the rate of temperature change T of described temperature sensor R1
S(t)-T
S(t-1); With the rate of temperature change of described temperature sensor R1, multiply by heat-conduction coefficient k, can calculate the temperature difference △ T=k * (T of described temperature sensor and described calandria
S(t)-T
S(t-1)), finally obtain the temperature T of described calandria
B=T
S(t)+k * (T
S(t)-T
S(t-1)).
Described temperature T
S(t) be the current detection temperature, described temperature T
S(t-1) be a preceding detected temperatures; Described heat-conduction coefficient k is the heat transfer parameter between described temperature sensor R1 and the described calandria.
Claims (2)
1. the thermometry of a coffee machine instant heating type heating body, comprise the single-chip microcomputer of carrying out detection algorithm, the temperature sensor R1 that is installed in instant heating type heating body water delivering orifice position and links to each other with described single-chip microcomputer, the described temperature sensor R1 other end connects power supply VCC, also comprise the stake resistance R2 and the capacitor C 1 that are connected with described temperature sensor R1, it is characterized in that: described single-chip microcomputer detects the temperature T of described temperature sensor R1 every the set time
S(t), with the temperature T of preceding one-shot measurement
S(t-1) subtract each other, obtain the rate of temperature change T of described temperature sensor R1
S(t)-T
S(t-1); With the rate of temperature change of described temperature sensor R1, multiply by heat-conduction coefficient k, can calculate the temperature difference △ T=k * (T of described temperature sensor R1 and described calandria
S(t)-T
S(t-1)), finally obtain the temperature T of described calandria
B=T
S(t)+k * (T
S(t)-T
S(t-1)), described temperature T
S(t) be the current detection temperature, described temperature T
S(t-1) be a preceding detected temperatures.
2. the thermometry of a kind of coffee machine instant heating type heating body as claimed in claim 1, it is characterized in that: the resistance of described temperature sensor R1 varies with temperature, stake resistance R2 is accurate fixed resistance, therefore described single-chip microcomputer just can calculate the temperature T of described temperature sensor R1 by AD transition detection port voltage
S(t).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103010127A CN101532884B (en) | 2009-03-20 | 2009-03-20 | A coffee machine instant heating type heating body temperature measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009103010127A CN101532884B (en) | 2009-03-20 | 2009-03-20 | A coffee machine instant heating type heating body temperature measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101532884A CN101532884A (en) | 2009-09-16 |
| CN101532884B true CN101532884B (en) | 2011-03-02 |
Family
ID=41103619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009103010127A Expired - Fee Related CN101532884B (en) | 2009-03-20 | 2009-03-20 | A coffee machine instant heating type heating body temperature measurement method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101532884B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101807055A (en) * | 2010-03-03 | 2010-08-18 | 东莞市步步高家用电器有限公司 | Time control heating method and circuit thereof |
| CN102243115B (en) * | 2011-07-01 | 2013-04-24 | 慈溪迈思特电子科技有限公司 | Method for quickly measuring water outlet temperature of instantaneous heater |
| CN103575056A (en) * | 2013-11-04 | 2014-02-12 | 合肥美的电冰箱有限公司 | Control method and temperature detection method of refrigerator |
-
2009
- 2009-03-20 CN CN2009103010127A patent/CN101532884B/en not_active Expired - Fee Related
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| Publication number | Publication date |
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| CN101532884A (en) | 2009-09-16 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110302 Termination date: 20120320 |