CN102735364A - Sample measurement environment device of milk cryoscope - Google Patents
Sample measurement environment device of milk cryoscope Download PDFInfo
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- CN102735364A CN102735364A CN201110081072XA CN201110081072A CN102735364A CN 102735364 A CN102735364 A CN 102735364A CN 201110081072X A CN201110081072X A CN 201110081072XA CN 201110081072 A CN201110081072 A CN 201110081072A CN 102735364 A CN102735364 A CN 102735364A
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Abstract
The invention relates to a sample measurement environment device of a milk cryoscope. A measuring cavity is comprised. The sample measurement environment device of the milk cryoscope is characterized in that a glass measurement test tube is arranged in the measuring cavity, the glass measurement test tube is inserted into a low temperature water bath liquid cooling tank, foam thermal insulating layers are poured outside the low temperature water bath liquid cooling tank on the top end, the bottom end, the front side and the read side, semiconductor refrigeration blocks are arranged outside the low temperature water bath liquid cooling tank on the left side and the right side, a cooling tank temperature control sensor is arranged in the low temperature water bath liquid cooling tank, a heat dissipation block is arranged outside the semiconductor refrigeration blocks, a cooling fan is arranged on the left side of the heat dissipation block, a vibrating spear and a glass bead type thermistor are arranged in the glass measurement test tube, and a sensor fixation seat which is lifted and descended through motor transmission is further arranged above the glass measurement test tube. The useful function of this invention lies in that a measured milk sample is kept in a relatively stable temperature environment.
Description
Technical field
The present invention relates to a kind of milk freezing point apparatus, relate in particular to the sample measurement environmental device of this milk freezing point apparatus.
Background technology
Milk and dairy produce are the food that a kind of ten minutes is popularized in people's life, and the quality of its quality receives people's attention deeply, and directly influences eater's the health and the reputation of manufacturing and processing enterprise.Just because of this, country has also strengthened the supervision to dairy products manufacturing enterprise.And for enterprise; Its quality as raw-material milk impacts direct quality to manufactured goods; The water mixing of non-technological requirement, doping not only require enterprise to replenish the production technology link; Increase the complicacy of production run, improved production cost, also caused the waste of the energy simultaneously.For this reason, enterprise is necessary to hold the outpost of the tax office of the inspection of raw and process materials.Equally, the check for manufactured goods is to guarantee goodwill and the necessary means of putting into practice social responsibility too.
Cryoscopic method is as China and even general in the world milk water cut detection method.It is the mensuration that is used for milk (or other WS) osmotic pressure or osmol concentration that cryoscopic method is measured.Press the physical chemistry classical theory, all genus WS all has vapour pressure reduction, the elevation of boiling point, freezing point descends and produces these four kinds of osmotic pressure (under the situation that semi-permeable diaphragm exists) " according to the number characteristic ".So-called " according to the number characteristic " is promptly irrelevant with the kind and the grain size of solute, and only depends on the numbers of particles of solute.Therefore just can try to achieve the numbers of particles of solute in this WS indirectly through the freezing point temperature of measuring the tested WS.
The WS from liquid state to solid-state cooling change procedure, the phenomenon of not frozen though temperature has met and exceeded this WS freezing temperature is referred to as " supercooling phenomenon ".The liquid state that is under the supercooled state is unsettled, and arbitrary disturbance just can cause its crystallization at once and become solid-state.In concrete measuring process; When tested milk sample temperature reaches the freezing point; Milk sample does not take place to freeze immediately, and when reaching supercooling temperature (3 ℃), the rod that shakes that plays adductive crystallization in the determinator produces and shakes by force; Make milk sample discharge latent heat and phase transformation---liquid state is converted into solid-state, and reach equilibrium point gradually---promptly measure freezing point.This just requires, and has temperature stably as the cold trap of tested milk sample environment of living in, so that each or inferior sample have identical as far as possible test condition in measuring process.And the domestic and international existing milk freezing test device temperature that adopt integrated from temperature control Voltage stabilizing module regulating and controlling cold-making block (no water at low temperature body lotion) or refrigeration groove (a small amount of water at low temperature body lotion) more; Because the temperature Control and Feedback is sluggish; Chamber groove internal heat capacity is little; Cause the temperature variation wave amplitude big, fluctuation is frequent.
Summary of the invention
The technical issues that need to address of the present invention have provided a kind of sample measurement environmental device of milk freezing point apparatus, are intended to solve the above problems.
In order to solve the problems of the technologies described above, the present invention realizes through following technical scheme:
The present invention includes: one measures cavity; In described measurement cavity, settle a glass to measure test tube; Described glass is measured test tube and is inserted in the water at low temperature body lotion cold trap; The upper/lower terminal in the said water at low temperature body lotion cold trap outside, the both sides, front and back are the pouring foaming thermofin respectively, settles the semiconductor refrigerating piece respectively at left and right two ends, the said water at low temperature body lotion cold trap outside; In said water at low temperature body lotion cold trap, settle a cold trap temperature control sensor; Radiating block is settled in the outside of said semiconductor refrigerating piece; Settle radiator fan in said radiating block left side; Measure at described glass and in vitro also to settle shake a rod and a beaded glass type thermistor; The one sensor holder by the drive of motor up-down, described glass also is set above measuring test tube.
Compared with prior art, the invention has the beneficial effects as follows: make tested milk sample in a metastable temperature environment.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is the circuit module figure that adopts among the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described in further detail:
Visible by Fig. 1: as to the present invention includes: one measures cavity 1; In described measurement cavity 1, settle a glass to measure test tube 2; Described glass is measured test tube 2 and is inserted in the water at low temperature body lotion cold trap 3; At said water at low temperature body lotion cold trap 3 outside upper/lower terminals, the both sides, front and back are pouring foaming thermofin 4 respectively, settles semiconductor refrigerating piece 5 respectively at left and right two ends, said water at low temperature body lotion cold trap 3 outsides; In said water at low temperature body lotion cold trap 3, settle a cold trap temperature control sensor (the integrated two ends of monolithic temperature-sensitive current source) 6; Radiating block 7 is settled in the outside of said semiconductor refrigerating piece 5; Settle radiator fan 8 in said radiating block 7 left sides; , also settles in described glass shake a rod 9 and a beaded glass type thermistor 10 in measuring test tube 2; The one sensor holder 11 by the drive of motor up-down, described glass also is set above measuring test tube 2.
The present invention is with the temperature (add the water at low temperature body lotion of 65ml ± 2ml in the cold trap, increased chamber groove internal heat capacity, strengthened the effect of environment temperature in the balance and stability cold trap) of PID self-adaptation adjustment semiconductor refrigerating groove.In measuring system, cooperate, guaranteed to gather and handle the precision and the resolving power of required data respectively with high-precision beaded glass type thermistor and high-precision a/d converter.
The present invention has adopted the integrated two ends of monolithic temperature-sensitive current source as cold trap temperature acquisition device, and low pressure fiducial chip and ultralow offset voltage operational amplifier are formed a closed-loop simulation control system (as shown in Figure 2).
Claims (1)
1. the sample measurement environmental device of a milk freezing point apparatus, one measures cavity; It is characterized in that: in described measurement cavity, settle a glass to measure test tube; Described glass is measured test tube and is inserted in the water at low temperature body lotion cold trap; The upper/lower terminal in the said water at low temperature body lotion cold trap outside, the both sides, front and back are the pouring foaming thermofin respectively, settles the semiconductor refrigerating piece respectively at left and right two ends, the said water at low temperature body lotion cold trap outside; In said water at low temperature body lotion cold trap, settle a cold trap temperature control sensor; Radiating block is settled in the outside of said semiconductor refrigerating piece; Settle radiator fan in said radiating block left side; Measure at described glass and in vitro also to settle shake a rod and a beaded glass type thermistor; The one sensor holder by the drive of motor up-down, described glass also is set above measuring test tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110081072XA CN102735364A (en) | 2011-03-31 | 2011-03-31 | Sample measurement environment device of milk cryoscope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110081072XA CN102735364A (en) | 2011-03-31 | 2011-03-31 | Sample measurement environment device of milk cryoscope |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102735364A true CN102735364A (en) | 2012-10-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110081072XA Pending CN102735364A (en) | 2011-03-31 | 2011-03-31 | Sample measurement environment device of milk cryoscope |
Country Status (1)
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| CN (1) | CN102735364A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941134A (en) * | 2012-11-27 | 2013-02-27 | 姬志刚 | Test tube rack with outer layer casing at controllable temperature from 0 degree to 5 degrees |
| CN106483047A (en) * | 2015-08-26 | 2017-03-08 | 上海依达医疗器械有限公司 | A kind of non-freezing solution box assembly of freezing point osmotic pressure analyzer |
| CN112649584A (en) * | 2020-12-18 | 2021-04-13 | 联想(北京)有限公司 | Liquid state detection method and device |
| CN112697594A (en) * | 2021-01-29 | 2021-04-23 | 何顺 | Glass ball test equipment |
-
2011
- 2011-03-31 CN CN201110081072XA patent/CN102735364A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102941134A (en) * | 2012-11-27 | 2013-02-27 | 姬志刚 | Test tube rack with outer layer casing at controllable temperature from 0 degree to 5 degrees |
| CN106483047A (en) * | 2015-08-26 | 2017-03-08 | 上海依达医疗器械有限公司 | A kind of non-freezing solution box assembly of freezing point osmotic pressure analyzer |
| CN112649584A (en) * | 2020-12-18 | 2021-04-13 | 联想(北京)有限公司 | Liquid state detection method and device |
| CN112697594A (en) * | 2021-01-29 | 2021-04-23 | 何顺 | Glass ball test equipment |
| CN112697594B (en) * | 2021-01-29 | 2024-04-05 | 南京智悟智能科技有限责任公司 | Glass ball test equipment |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20121017 |