CN108680375B - Vacuum refrigeration performance test experimental device - Google Patents
Vacuum refrigeration performance test experimental device Download PDFInfo
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- CN108680375B CN108680375B CN201810734797.6A CN201810734797A CN108680375B CN 108680375 B CN108680375 B CN 108680375B CN 201810734797 A CN201810734797 A CN 201810734797A CN 108680375 B CN108680375 B CN 108680375B
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses a vacuum refrigeration performance test experiment device which comprises a vacuum box, wherein a pressure sensor and a humidity sensor are arranged in the vacuum box, a water catcher is arranged at the upper part of an inner cavity of the vacuum box, the water catcher is connected with a refrigerating system, the vacuum box is connected with a vacuum system, a water outlet of the water catcher is connected with the upper end of the water collecting box, the lower end of the water collecting box is connected with a condensate water metering tank through a first valve, a first temperature probe is arranged below the condensate water metering tank, the lower part of the vacuum box is connected with the upper end of a residual water metering tank through a third valve, a fifth temperature probe is arranged below the residual water metering tank, the lower end of a cooling metering tank is connected with the vacuum box through a second valve, a second temperature probe and an electric heater are arranged in the cooling metering tank, and the first temperature probe, the second temperature probe, the third temperature probe, the fourth temperature probe, the pressure sensor and the humidity sensor are respectively connected with a data acquisition terminal. The vacuum refrigerating performance test experimental device provided by the invention can accurately measure the vacuum refrigerating capacity under different working conditions.
Description
Technical Field
The invention relates to a vacuum refrigeration performance test experimental device, and belongs to the field of refrigeration equipment.
Background
In the field of refrigeration equipment, vacuum refrigeration is a relatively unique refrigeration method, the operation mechanism of the vacuum refrigeration is completely different from other refrigeration modes commonly used in the market at present, but the vacuum refrigeration is a very ideal precooling technology, is the refrigeration technology with the fastest cooling at present, and can be applied to the fresh-keeping field of flowers, fruits and the like. Because of its relatively cool nature, it is currently not well known and its mechanism of operation is not well analyzed. However, as an important index of the refrigeration equipment, the energy efficiency ratio is an unavoidable index, for vacuum refrigeration, the energy consumption of a vacuum pump is large, the refrigerating capacity of the vacuum pump is directly related to the evaporation capacity of water-rich cooling objects such as flowers and fruits to a great extent, meanwhile, the initial cooling conditions of the cooling objects are different, and how to accurately measure the vacuum refrigerating capacity under different working conditions is very important to measure the energy efficiency ratio of a vacuum cooling device.
Disclosure of Invention
The invention aims to solve the technical problem of providing a vacuum refrigeration performance test experimental device for accurately measuring the energy efficiency ratio of vacuum refrigeration capacity to a vacuum cooling device.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a vacuum refrigeration capability test experimental apparatus, includes the vacuum tank, be provided with pressure sensor and humidity transducer in the vacuum tank, vacuum tank inner chamber upper portion is provided with the water trap, the water trap even has refrigerating system, the vacuum tank even has vacuum system, the water trap is provided with water trap air inlet and water trap delivery port, the water trap delivery port with the header tank upper end links to each other, the header tank lower extreme links to each other with the comdenstion water metering tank through first valve, the lower extreme of comdenstion water metering tank is provided with first water drain valve, be provided with first temperature probe below in the comdenstion water metering tank, link to each other with surplus water metering tank upper end through the third valve below the vacuum tank, surplus water metering tank lower extreme is provided with the second water drain valve, be provided with fifth temperature probe below in the surplus water metering tank, the cooling metering tank lower extreme through the second valve with the water trap delivery port, be provided with second temperature probe and electric heater in the cooling metering tank, first temperature probe, second temperature probe, third temperature probe, fourth temperature sensor, fifth temperature sensor and humidity transducer link to each other with vacuum probe data acquisition terminal respectively.
The refrigerating system comprises a compressor, a condenser and an expansion valve which are sequentially connected, and the compressor and the expansion valve are connected with the water catcher.
The compressor, the condenser, the expansion valve and the water catcher are connected through copper pipes.
The compressor, the condenser, the expansion valve and the water catcher adopt R134A refrigerant.
The vacuum system comprises a gas-liquid separator, the air inlet of the gas-liquid separator is connected with the vacuum box, the air outlet of the gas-liquid separator is sequentially connected with a vacuum valve and a vacuum pump, and the water outlet of the liquid separator is connected with the lower end of the water collecting box.
And the upper end of the side surface of the cooling metering tank is filled with water by arranging a tap water valve.
The invention has the beneficial effects that: the invention provides a vacuum refrigeration performance test experiment device, which can simulate cooling objects under different initial temperature conditions by changing heating quantity, automatically generate related data, calculate corresponding energy efficiency ratio data, analyze change trend of energy efficiency ratio under different working conditions and the like by measuring hot water quantity and temperature thereof entering the device, processing residual cold water quantity and temperature thereof after reaching set temperature, capturing water quantity and temperature thereof, combining compressor energy consumption data and vacuum pump energy consumption data, analyzing and calculating acquired data by means of software programs additionally developed in a computer.
Drawings
Fig. 1 is a schematic structural diagram of a vacuum refrigeration performance test experimental device of the invention.
Reference numerals in the drawings are as follows: 1-a compressor; a 2-condenser; a 3-expansion valve; 4-a water catcher; 5-a water catcher air inlet; 6, a water outlet of the water catcher; 7-a water collecting tank; 8-a first valve; 9-a condensed water metering tank; 10-a first drain valve; 11-a gas-liquid separator; 12-a vacuum valve; 13-a vacuum pump; 14-a first temperature probe; 15-a second temperature probe; 16-a third temperature probe; 17-a pressure sensor; 18-a humidity sensor; 19-fourth temperature probe; 20-a fifth temperature probe; 21-a data acquisition terminal; 22-tap water valve; 23-cooling the metering tank; 24-electric heaters; 25-a second valve; 26-a second drain valve; 27-a residual water metering tank; 28-a third valve; 29-vacuum box.
Detailed Description
The present invention will be further described with reference to the accompanying drawings, and the following examples are only for more clearly illustrating the technical aspects of the present invention, and are not to be construed as limiting the scope of the present invention.
As shown in FIG. 1, a vacuum refrigeration performance test experiment device comprises a vacuum box 29 for ensuring good tightness when the negative pressure in the box is ensured. The vacuum box 29 is internally provided with a pressure sensor 17 and a humidity sensor 18 which are respectively used for acquiring a pressure value and a humidity value in the vacuum box 29, the upper part of the inner cavity of the vacuum box 29 is provided with a water catcher 4, and the water catcher 4 is connected with a refrigerating system. The refrigerating system comprises a compressor 1, a condenser 2 and an expansion valve 3 which are connected in sequence, wherein the compressor 1 and the expansion valve 3 are connected with a water catcher 4. The compressor 1, the condenser 2, the expansion valve 3 and the water catcher 4 are connected through copper pipes. The compressor 1, the condenser 2, the expansion valve 3 and the water catcher 4 adopt R134A refrigerant, the refrigeration evaporation temperature is adjustable within 0 ℃ to minus 25 ℃, and the refrigeration cycle is formed. Different working conditions of the expansion valve 3 can provide different refrigeration evaporation temperatures to provide a cold source for the water catcher 4, so that water vapor flowing through the water catcher 4 can be condensed into liquid water to fall into the water collecting tank 7.
The vacuum box 29 is connected with a vacuum system, the vacuum system comprises a gas-liquid separator 11, the air inlet of the gas-liquid separator 11 is connected with the vacuum box 29, the air outlet of the gas-liquid separator 11 is sequentially connected with a vacuum valve 12 and a vacuum pump 13, and the water outlet of the liquid separator 11 is connected with the lower end of the water collection tank 7. The gas-liquid separator is used as a protection device of a vacuum pump, and when the water catcher 4 fails to catch water vapor in a percentage way, the steam-water separation effect is ensured to reach more than 95%. The vacuum valve 12 is used for synchronizing with the start and stop of the vacuum pump 13, and when the vacuum pump 13 stops working, the vacuum valve 12 can automatically seal the vacuum system, so that the vacuum system is prevented from being polluted by the return flow of lubricating oil of the vacuum pump.
The water catcher 4 is provided with a water catcher air inlet 5 and a water catcher water outlet 6, gas in the vacuum box 29 enters the water catcher 4 through the water catcher air inlet 5, and liquid water condensed in the water catcher 4 enters the water collecting tank 7 through the water catcher water outlet 6. The water outlet 6 of the water catcher is connected with the upper end of a water collecting tank 7, and the lower end of the water collecting tank 7 is connected with a condensed water metering tank 9 through a first valve 8. The first valve 8 is closed when the vacuum pump 13 is in operation and opened when the vacuum pump 13 is stopped, and condensed water can enter the metering tank 9.
The lower extreme of comdenstion water metering tank 9 is provided with first water escape valve 10, is provided with first temperature probe 14 below in the comdenstion water metering tank 9, and vacuum tank 29 passes through third valve 28 below and links to each other with surplus water metering tank 27 upper end, and surplus water metering tank 27 lower extreme is provided with second water escape valve 26, is provided with fifth temperature probe 20 below in the surplus water metering tank 27, and the cooling metering tank 23 lower extreme passes through second valve 25 and links to each other with vacuum tank 29.
The remaining water metering tank 27 and the cooling metering tank 23 are used for accurately metering the amount of remaining water after cooling and accurately metering the amount of condensed water, respectively. The cooling metering tank 23 is internally provided with a second temperature probe 15 and an electric heater 24, and the upper end of the side surface of the cooling metering tank 23 is filled with water by arranging a tap water valve 22. The first temperature probe 14, the second temperature probe 15, the third temperature probe 16, the fourth temperature probe 19, the fifth temperature probe 20, the pressure sensor 17 and the humidity sensor 18 are respectively connected with a data acquisition terminal 21, and acquired data are transmitted to the data acquisition terminal 21 for analysis and processing.
The corresponding energy efficiency ratio measuring principle of the invention is that the consumed electric quantity is easy to obtain, only the electric meter is arranged for the vacuum pump, but the corresponding refrigerating capacity is obtained by an indirect method. According to engineering thermodynamic water and steam characteristics, water under certain pressure is required to be changed into steam, a large amount of vaporization latent heat is required to be absorbed, the value is much higher than sensible heat related to temperature change, then the difference between the height Wen Shuiliang of entering a vacuum box and the residual water quantity after refrigeration reaches a set temperature is the water quantity evaporated in the vacuum box, and the value of vacuum refrigeration capacity can be calculated by combining a water and steam chart. The evaporated water quantity is captured and measured in the water catcher by the illustrated vapor compression type refrigerating device, and the power consumption of the refrigerating compressor and the reverse calculation of the refrigerating device can be compared with the previous data through verification, so that the calculation of the conventional vapor compression type refrigerating device is very simple, and the method has corresponding examples in a refrigerating air conditioner design manual.
The working process of the invention is as follows: before the device operates, all valves are in the closed state in the figure.
The tap water valve is opened, a certain amount of water can be injected into the cooling metering tank, and the electric heater is started to heat the water temperature to a certain specific working condition. After the water temperature is constant, the electric heater is turned off, the second valve is turned on to inject a certain amount of water into the vacuum box, and then the second valve is turned off, so that the water injection step is completed.
Starting the compressor, starting the refrigeration cycle, and completing the preparation work of the water catcher.
The vacuum pump is started, the vacuum valve is synchronously opened, the pressure in the vacuum box is reduced to a certain set value, the water catcher is positioned at the upper part of the vacuum box, the baffle plate is arranged in the vacuum box, the air outlet of the water catcher is communicated with the vacuum pump through the gas-liquid separator and the vacuum valve, under the action of pressure difference generated by air suction of the vacuum pump, water vapor in the vacuum box flows into the water catcher to be trapped and condensed into water by the low-temperature evaporating pipe, and the condensed water flows into the water collecting tank under the action of gravity.
And when the third temperature probe detects that the water temperature in the vacuum box is cooled to the set temperature, the vacuum pump is closed, the vacuum valve is synchronously closed, and the compressor is closed after continuing to run for one minute.
And the third valve is opened, the residual water in the vacuum box which has reached the cooling temperature flows into the residual water metering tank, and the water quantity can be accurately read.
The first valve is opened, and water at the lower parts of the water collecting tank and the gas-liquid separator flows into the condensed water metering tank, so that the water quantity can be accurately read.
The temperature value, the pressure value and the humidity value which need to be measured in the process are sensed by probes or sensors at corresponding positions and then transmitted to a data acquisition terminal, in particular to a computer.
According to the water quantity and water temperature of the cooled object; the amount and temperature of the residual water after cooling; the amount of condensed water and the temperature of water; the vaporization latent heat value of water under the corresponding pressure and the sensible heat change values under different temperatures are utilized, and the power consumption data of the compressor and the power consumption data of the vacuum pump are combined to correspondingly calculate each part in the graph, so that the refrigerating capacity and the energy efficiency ratio under the corresponding working conditions can be obtained. And then changing the initial temperature of the cooled water, the throttling working condition of the expansion valve and different pressures of the vacuum box after the vacuum pump pumps, and obtaining a series of different data for analysis.
The foregoing is merely a preferred embodiment of the present invention and it will be apparent to those skilled in the art that numerous modifications and variations can be made without departing from the principles of the invention, and such modifications and variations are to be regarded as being within the scope of the invention.
Claims (4)
1. The utility model provides a vacuum refrigeration capability test experimental apparatus which characterized in that: including vacuum tank (29), be provided with pressure sensor (17) and humidity transducer (18) in vacuum tank (29), vacuum tank (29) inner chamber upper portion is provided with water trap (4), water trap (4) even have refrigerating system, vacuum tank (29) even have vacuum system, water trap (4) are provided with water trap air inlet (5) and water trap delivery port (6), water trap delivery port (6) links to each other with water tank (7) upper end, water tank (7) lower extreme links to each other with comdenstion water metering tank (9) through first valve (8), the lower extreme of comdenstion water metering tank (9) is provided with first drain valve (10), be provided with first temperature probe (14) below in comdenstion water metering tank (9), vacuum tank (29) are connected with remaining water metering tank (27) upper end through third valve (28), remaining water metering tank (27) lower extreme is provided with second drain valve (26), be provided with in-side metering tank (27) and be provided with second temperature probe (14) below the third valve (28), cooling probe (25) are provided with temperature probe (25) below the cooling tank (25), cooling tank (25) are provided with temperature probe (14) below the cooling tank (25) The system comprises a second temperature probe (15), a third temperature probe (16), a fourth temperature probe (19), a fifth temperature probe (20), a pressure sensor (17) and a humidity sensor (18) which are respectively connected with a data acquisition terminal (21), wherein a refrigerating system comprises a compressor (1), a condenser (2) and an expansion valve (3) which are sequentially connected, the compressor (1) and the expansion valve (3) are connected with a water catcher (4), the vacuum system comprises a gas-liquid separator (11), an air inlet of the gas-liquid separator (11) is connected with a vacuum box (29), an air outlet of the gas-liquid separator (11) is sequentially connected with a vacuum valve (12) and a vacuum pump (13), and a water outlet of the gas-liquid separator (11) is connected with the lower end of the water catcher (7).
2. The vacuum refrigeration performance test experimental device according to claim 1, wherein: the compressor (1), the condenser (2), the expansion valve (3) and the water catcher (4) are connected through copper pipes.
3. The vacuum refrigeration performance test experimental device according to claim 1, wherein: the compressor (1), the condenser (2), the expansion valve (3) and the water catcher (4) adopt R134A refrigerant.
4. The vacuum refrigeration performance test experimental device according to claim 1, wherein: the upper end of the side surface of the cooling metering tank (23) is filled with water by arranging a tap water valve (22).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810734797.6A CN108680375B (en) | 2018-07-05 | 2018-07-05 | Vacuum refrigeration performance test experimental device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810734797.6A CN108680375B (en) | 2018-07-05 | 2018-07-05 | Vacuum refrigeration performance test experimental device |
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| CN108680375A CN108680375A (en) | 2018-10-19 |
| CN108680375B true CN108680375B (en) | 2023-09-22 |
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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 |
|---|
| 真空预冷实验装置计算机检测系统;贺素艳;王德昌;马永志;;农业机械学报(第10期);第111-113页 * |
| 韩志 等.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).2006,(第58期),第17-19页. * |
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