CN108680375A - A kind of vacuum freezing performance test experimental apparatus - Google Patents
A kind of vacuum freezing performance test experimental apparatus Download PDFInfo
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- CN108680375A CN108680375A CN201810734797.6A CN201810734797A CN108680375A CN 108680375 A CN108680375 A CN 108680375A CN 201810734797 A CN201810734797 A CN 201810734797A CN 108680375 A CN108680375 A CN 108680375A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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Abstract
The invention discloses a kind of vacuum freezing performance test experimental apparatus,Including vacuum tank,Pressure sensor and humidity sensor are provided in vacuum tank,Vacuum box cavity top is provided with water vessel,Water vessel is connected with refrigeration system,Vacuum tank is connected with vacuum system,Water vessel water outlet is connected with header tank upper end,Header tank lower end is connected by the first valve with condensation water measuring tank,First temperature probe is provided below in condensation water measuring tank,Vacuum tank is connected below by third valve with remaining water measuring tank upper end,The 5th temp probe is provided below in remaining water measuring tank,Cooling measuring tank lower end is connected by the second valve with vacuum tank,It is provided with second temperature probe and electric heater in cooling measuring tank,First temperature probe,Second temperature probe,Third temp probe,4th temp probe,5th temp probe,Pressure sensor and humidity sensor are connected with data collection station respectively.The present invention a kind of vacuum freezing performance test experimental apparatus, can under different working conditions Accurate Determining vacuum freezing amount.
Description
Technical field
The present invention relates to a kind of vacuum freezing performance test experimental apparatus, belong to art of refrigeration units.
Background technology
In art of refrigeration units, vacuum freezing is a kind of more unique refrigerating method, and operation mechanism is totally different from
Current other refrigeration modes common on the market, but it is a kind of ideal pre- refrigeration technique, is that current cooling is most fast
A kind of Refrigeration Technique can be applied in the preservation fields such as flowers, fruit.Just because of its comparison unexpected winner, thus at present to it
Understanding is deep not enough, not deep enough to the analysis of its operation mechanism.But as a kind of refrigeration equipment, Energy Efficiency Ratio is can not to return
The important indicator kept away, for vacuum freezing, the energy consumption of vacuum pump is larger, and its refrigerating capacity largely and
The evaporation capacity of these cooling objects rich in moisture of flowers, fruit is directly related, while the initial cooling item of these cooling objects
Part is different, under different working conditions how Accurate Determining vacuum freezing amount to measure vacuum cooling unit Energy Efficiency Ratio
It is extremely important.
Invention content
The technical problem to be solved by the present invention is to provide a kind of Accurate Determining vacuum freezing amount to measuring vacuum cooling unit
Energy Efficiency Ratio vacuum freezing performance test experimental apparatus.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
A kind of vacuum freezing performance test experimental apparatus, including vacuum tank are provided with pressure sensor in the vacuum tank
And humidity sensor, vacuum box cavity top are provided with water vessel, the water vessel is connected with refrigeration system, the vacuum tank
It is connected with vacuum system, the water vessel is provided with water vessel air inlet and water vessel water outlet, the water vessel water outlet and institute
It states header tank upper end to be connected, the header tank lower end is connected by the first valve with condensation water measuring tank, the condensed water metering
The lower end of tank is provided with the first drain valve, and first temperature probe, the vacuum tank is provided below in the condensation water measuring tank
It is connected with remaining water measuring tank upper end below by third valve, the residue water measuring tank lower end is provided with the second drain valve,
The 5th temp probe is provided below in the residue water measuring tank, cooling measuring tank lower end passes through the second valve and the vacuum
Case is connected, and second temperature probe and electric heater, the first temperature probe, second temperature are provided in the cooling measuring tank
Probe, third temp probe, the 4th temp probe, the 5th temp probe, pressure sensor and humidity sensor respectively with data
Acquisition terminal is connected.
The refrigeration system includes sequentially connected compressor, condenser and expansion valve, the compressor and expansion valve with
The water vessel is connected.
It is connected by copper pipe between the compressor, condenser, expansion valve and water vessel.
The compressor, condenser, expansion valve and water vessel use R134A refrigerants.
The vacuum system includes gas-liquid separator, and the air inlet of the gas-liquid separator is connected with the vacuum tank, described
The gas outlet of gas-liquid separator is sequentially connected with vacuum valve and vacuum pump, the water outlet of the liquid/gas separator and the header tank lower end
It is connected.
Water filling is realized by the way that running water valve is arranged in the cooling measuring tank side upper end.
Beneficial effects of the present invention：A kind of vacuum freezing performance test experimental apparatus provided by the invention, using the device,
The cooling object under different initial temperature conditions can be simulated by changing heating amount, by enter device hot water amount and
Its temperature measuring handles the remaining cool water quantity after reaching set temperature and its temperature measuring, capture water and its temperature measuring, knot
Close compressor energy consumption data, vacuum pump consume energy data, in a computer by the software program separately developed to gathered data into
Row analysis calculates, and can automatically generate related data, calculate corresponding Energy Efficiency Ratio data, analysis Energy Efficiency Ratio under different working conditions
Variation tendency etc..
Description of the drawings
Fig. 1 is a kind of vacuum freezing performance test experimental apparatus structural schematic diagram of the present invention.
Reference numeral is as follows in figure：1- compressors；2- condensers；3- expansion valves；4- water vessels；5- water vessel air inlets；
6- water vessel water outlets；7- header tanks；The first valves of 8-；9- condenses water measuring tank；The first drain valves of 10-；11- gas-liquid separations
Device；12- vacuum valves；13- vacuum pumps；14- first temperature probes；15- second temperature probes；16- third temp probes；17- is pressed
Force snesor；18- humidity sensors；The 4th temp probes of 19-；The 5th temp probes of 20-；21- data collection stations；22- is certainly
Carry out penstock；23- cools down measuring tank；24- electric heaters；The second valves of 25-；The second drain valves of 26-；27- residue water measuring tanks；
28- third valves；29- vacuum tanks.
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings, and following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
As shown in Figure 1, a kind of vacuum freezing performance test experimental apparatus, including vacuum tank 29, for negative pressure in guard box
When have good leakproofness.It is provided with pressure sensor 17 and humidity sensor 18 in vacuum tank 29, is respectively used to obtain true
Pressure value is obtained in empty van 29 and humidity value, 29 inner cavity top of vacuum tank are provided with water vessel 4, and water vessel 4 is connected with refrigeration system.
Refrigeration system includes sequentially connected compressor 1, condenser 2 and expansion valve 3, and compressor 1 and expansion valve 3 are connected with water vessel 4.
It is connected by copper pipe between compressor 1, condenser 2, expansion valve 3 and water vessel 4.It compressor 1, condenser 2, expansion valve 3 and catches
Hydrophone 4 uses R134A refrigerants, and refrigeration evaporator temperature is adjustable in 0 DEG C Dao -25 DEG C, constitutes refrigeration cycle.Different expansion valves
3 operating modes can provide different refrigeration evaporator temperature, provide low-temperature receiver for water vessel 4, the vapor to flow through water vessel 4 can
It is fallen into header tank 7 with being condensed into liquid water.
Vacuum tank 29 is connected with vacuum system, and vacuum system includes gas-liquid separator 11, and the air inlet of gas-liquid separator 11 connects
There are vacuum tank 29, the gas outlet of gas-liquid separator 11 to be sequentially connected with vacuum valve 12 and vacuum pump 13, the water outlet of liquid/gas separator 11
It is connected with 7 lower end of header tank.Gas-liquid separator effect is the protective device of vacuum pump, when water vessel 4 fails very to capture water
When steam, ensure that steam-water separation effect reaches 95% or more.The effect of vacuum valve 12 be it is synchronous with the start and stop of vacuum pump 13, surely
When sky pump 13 is stopped, vacuum valve 12 can automatically close vacuum system, avoid vacuum pump lubricating oils from backflowing and pollute vacuum system
Unite
Water vessel 4 is provided with water vessel air inlet 5 and water vessel water outlet 6, and the gas in vacuum tank 29 passes through water vessel
Air inlet 5 enters water vessel 4, and the liquid water after being condensed in water vessel 4 enters header tank 7 by water vessel water outlet 6.Water vessel
Water outlet 6 is connected with 7 upper end of header tank, and 7 lower end of header tank is connected by the first valve 8 with condensation water measuring tank 9.First valve
8 close when vacuum pump 13 works, and vacuum pump 13 is opened when stopping, and condensed water can enter measuring tank 9.
The lower end of condensation water measuring tank 9 is provided with the first drain valve 10, condenses and the first temperature is provided below in water measuring tank 9
Degree probe 14, vacuum tank 29 is connected below by third valve 28 with 27 upper end of remaining water measuring tank, under remaining water measuring tank 27
End is provided with the second drain valve 26, and the 5th temp probe 20 is provided below in remaining water measuring tank 27, cools down under measuring tank 23
End is connected by the second valve 25 with vacuum tank 29.
Remaining water measuring tank 27 and cooling measuring tank 23 are respectively used to surplus water and accurate metering after accurately metering cooling
Condensation water quantity.Second temperature probe 15 and electric heater 24,23 side upper end of cooling measuring tank are provided in cooling measuring tank 23
Water filling is realized by the way that running water valve 22 is arranged.First temperature probe 14, second temperature probe 15, third temp probe 16,
Four temp probes 19, the 5th temp probe 20, pressure sensor 17 and humidity sensor 18 respectively with 21 phase of data collection station
Even, collected data are transferred to data collection station 21 and carry out analyzing processing.
The present invention corresponds to Energy Efficiency Ratio measuring principle, and the electricity of consumption is easy to obtain, as long as filling an ammeter to vacuum pump
, but the acquisition of corresponding refrigerating capacity must rely on round-about way.According to Engineering Thermodynamics water and steam characteristic, one
Water under constant-pressure will become vapor, need to absorb a large amount of latent heat of vaporization, this numeric ratio and temperature change are relevant aobvious
Heat wants much higher, then being exactly into the difference between the high temperature water and the surplus water after reaching set temperature of freezing of vacuum tank
The water evaporated in vacuum tank, thus can be in conjunction with the numerical value that vacuum freezing amount is calculated after water and steam chart.And
The vapor compression refrigeration device that the water of this evaporation is illustrated again in water vessel is captured and can be measured, and is passed through
The reversed reckoning of the power consumption combination refrigerating plant of refrigeration compressor can carry out proving and comparisom with data just now, this is usual
Vapor compression refrigeration device calculate in it is very simple, just have corresponding example in refrigeration air-conditioner design manual.
The present invention the course of work be：Before device operation, all valves are in closed state in figure.
Running water valve is opened, can be toward the water for injecting quantification in cooling measuring tank, starting electric heater can be by
Water temperature heating is to certain specific operation.Electric heater is closed after constant water temperature, opening the second valve can inject really into vacuum tank
The water of fixed number amount, is then shut off the second valve, and priming steps are completed.
Compressor is opened, refrigeration cycle is started to work, and the preparation of water vessel is completed.
Vacuum pump is opened, vacuum valve, which synchronizes, to be opened, and pressure is reduced to a certain setting value, water vessel to be located at vacuum in vacuum tank
Upper box part, inside setting baffle plate, gas outlet are communicated through gas-liquid separator, vacuum valve with vacuum pump, and institute is evacuated in vacuum pump
Under the action of generating pressure difference, the vapor in vacuum tank flows into water vessel and is condensed into water by the trapping of low-temperature evaporation pipe, and condensed water exists
It is flowed into header tank under gravity.
A period of time after when vacuum tank reaches setting pressure, when third temp probe detects that water temperature cools down in vacuum tank
To set temperature, vacuum pump, vacuum valve close synchronously are closed, compressor is closed after continuing to run with one minute.
Third valve is opened, the remaining water for having reached cooling temperature flows into remaining water measuring tank, Ke Yizhun in vacuum tank
Really read its water.
The water inflow condensation water measuring tank for opening the first valve, header tank and gas-liquid separator lower part, can accurately read
Its water.
Need the temperature value measured, pressure value, humidity value by the probe of corresponding site or sensor in above procedure
Data collection station, specially computer are sent to after perception.
According to the water of cooled object, water temperature；Water, the water temperature of remaining water after cooling；Condensed water water, water temperature；Profit
With latent heat of vaporization value of the water under corresponding pressure, the sensible heat changing value under different temperatures, in conjunction with compressor power consumption data,
The power consumption data of vacuum pump accordingly calculates each component in figure, can obtain refrigerating capacity and efficiency under corresponding operating mode
Than.The different pressures for changing vacuum tank after the initial temperature of cooled water, the cutting condition of expansion valve, vacuum pump extract again, can
To obtain a series of different data so that analysis is used.
The above is only a preferred embodiment of the present invention, for those skilled in the art, exist
Without departing from the principles of the invention, several improvements and modifications can also be made, these improvements and modifications also should be regarded as this hair
Bright protection domain.
Claims (6)
1. a kind of vacuum freezing performance test experimental apparatus, it is characterised in that：Including vacuum tank (29), in the vacuum tank (29)
It is provided with pressure sensor (17) and humidity sensor (18), vacuum tank (29) the inner cavity top is provided with water vessel (4), institute
It states water vessel (4) and is connected with refrigeration system, the vacuum tank (29) is connected with vacuum system, and the water vessel (4) is provided with water vessel
Air inlet (5) and water vessel water outlet (6), the water vessel water outlet (6) are connected with the header tank (7) upper end, the collection
Water tank (7) lower end is connected by the first valve (8) with condensation water measuring tank (9), the lower end setting of the condensation water measuring tank (9)
There is the first drain valve (10), first temperature probe (14), the vacuum tank is provided below in the condensation water measuring tank (9)
(29) it is connected with remaining water measuring tank (27) upper end below by third valve (28), described residue water measuring tank (27) lower end is set
It is equipped with the second drain valve (26), the 5th temp probe (20), cooling metering are provided below in the residue water measuring tank (27)
Tank (23) lower end is connected by the second valve (25) with the vacuum tank (29), and second is provided in the cooling measuring tank (23)
Temp probe (15) and electric heater (24), the first temperature probe (14), second temperature probe (15), third temp probe
(16), the 4th temp probe (19), the 5th temp probe (20), pressure sensor (17) and humidity sensor (18) respectively with number
It is connected according to acquisition terminal (21).
2. a kind of vacuum freezing performance test experimental apparatus according to claim 1, it is characterised in that：The refrigeration system
Including sequentially connected compressor (1), condenser (2) and expansion valve (3), the compressor (1) and expansion valve (3) are caught with described
Hydrophone (4) is connected.
3. a kind of vacuum freezing performance test experimental apparatus according to claim 2, it is characterised in that：The compressor
(1), it is connected by copper pipe between condenser (2), expansion valve (3) and water vessel (4).
4. a kind of vacuum freezing performance test experimental apparatus according to claim 2, it is characterised in that：The compressor
(1), condenser (2), expansion valve (3) and water vessel (4) use R134A refrigerants.
5. a kind of vacuum freezing performance test experimental apparatus according to claim 1, it is characterised in that：The vacuum system
Including gas-liquid separator (11), the air inlet of the gas-liquid separator (11) is connected with the vacuum tank (29), the gas-liquid separation
The gas outlet of device (11) is sequentially connected with vacuum valve (12) and vacuum pump (13), water outlet and the collection of the liquid/gas separator (11)
Water tank (7) lower end is connected.
6. a kind of vacuum freezing performance test experimental apparatus according to claim 1, it is characterised in that：The cooling metering
Water filling is realized by the way that running water valve (22) is arranged in tank (23) side upper end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734797.6A CN108680375B (en) | 2018-07-05 | 2018-07-05 | Vacuum refrigeration performance test experimental device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810734797.6A CN108680375B (en) | 2018-07-05 | 2018-07-05 | Vacuum refrigeration performance test experimental device |
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| Publication Number | Publication Date |
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| CN108680375A true CN108680375A (en) | 2018-10-19 |
| CN108680375B CN108680375B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810734797.6A Active CN108680375B (en) | 2018-07-05 | 2018-07-05 | Vacuum refrigeration performance test experimental device |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5317882A (en) * | 1993-04-27 | 1994-06-07 | Ritenour Paul E | Unique water vapor vacuum refrigeration system |
| CN101435652A (en) * | 2008-12-10 | 2009-05-20 | 霍凤莲 | Vacuum freeze-drying machine |
| CN204096325U (en) * | 2014-09-02 | 2015-01-14 | 天津商业大学 | decompressing storage device |
| CN104833147A (en) * | 2015-04-27 | 2015-08-12 | 黑龙江省农业科学院畜牧研究所 | Vacuum precooling and fresh-keeping equipment capable of preventing ice blockage of cold trap |
| CN205082610U (en) * | 2015-09-22 | 2016-03-16 | 湖南洞庭明珠食品有限公司 | Prepared food vacuum precooling desiccator |
| CN205431850U (en) * | 2015-12-31 | 2016-08-10 | 云南富邦制冷设备有限公司 | Vacuum pre -cooler for fruits and vegetables |
-
2018
- 2018-07-05 CN CN201810734797.6A patent/CN108680375B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5317882A (en) * | 1993-04-27 | 1994-06-07 | Ritenour Paul E | Unique water vapor vacuum refrigeration system |
| CN101435652A (en) * | 2008-12-10 | 2009-05-20 | 霍凤莲 | Vacuum freeze-drying machine |
| CN204096325U (en) * | 2014-09-02 | 2015-01-14 | 天津商业大学 | decompressing storage device |
| CN104833147A (en) * | 2015-04-27 | 2015-08-12 | 黑龙江省农业科学院畜牧研究所 | Vacuum precooling and fresh-keeping equipment capable of preventing ice blockage of cold trap |
| CN205082610U (en) * | 2015-09-22 | 2016-03-16 | 湖南洞庭明珠食品有限公司 | Prepared food vacuum precooling desiccator |
| CN205431850U (en) * | 2015-12-31 | 2016-08-10 | 云南富邦制冷设备有限公司 | Vacuum pre -cooler for fruits and vegetables |
Non-Patent Citations (2)
| Title |
|---|
| 贺素艳;王德昌;马永志;: "真空预冷实验装置计算机检测系统", 农业机械学报, no. 10, pages 111 - 113 * |
| 韩志;谢晶;: "真空预冷实验机的数据采集系统与实验研究", 农产品加工(学刊), no. 03, pages 17 - 19 * |
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| CN108680375B (en) | 2023-09-22 |
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