CN102706396A - Capillary tube flow testing device - Google Patents
Capillary tube flow testing device Download PDFInfo
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- CN102706396A CN102706396A CN2011100747887A CN201110074788A CN102706396A CN 102706396 A CN102706396 A CN 102706396A CN 2011100747887 A CN2011100747887 A CN 2011100747887A CN 201110074788 A CN201110074788 A CN 201110074788A CN 102706396 A CN102706396 A CN 102706396A
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- kapillary
- capillary tube
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Abstract
The invention discloses a capillary tube flow testing device, which comprises a refrigerant liquid storage tank, a one-way valve, a manual switch, a high pressure maintaining valve, a capillary tube clamp, an inlet pressure sensor, an outlet pressure sensor, a back pressure side lower pressure maintaining valve, a self-balancing type pressure control valve, a refrigerant recycling filling machine and a back pressure sensor. The refrigerant liquid storage tank is accommodated in a thermotank; the one-way valve is communicated with an output port end of the liquid storage tank via a pipeline; the manual switch and the high pressure maintaining valve are sequentially serially connected to the rear of the one-way valve; the capillary tube clamp is used for fixing a detected capillary tube; the inlet pressure sensor and the outlet pressure sensor are respectively parallelly connected to refrigerant flowing channels nearby two ends of the detected capillary tube fixed by the capillary tube clamp; the back pressure side low pressure maintaining valve, the self-balancing type pressure control valve and the refrigerant recycling filling machine are sequentially connected to the rear of the capillary tube clamp; and the back pressure sensor is parallelly connected to the rear of the low pressure maintaining valve. The capillary tube flow testing device forms a whole refrigerant loop and truthfully simulates the working state of the capillary tube, and calculates pressure difference of the refrigerant after the refrigerant passes through the capillary tube by controlling and measuring pressure and temperature, so that change of roughness of the capillary tube is detected, and the throttling effect of the capillary tube is improved according to the change.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to a kind of proving installation of kapillary flow of air conditioner.
Background technology
Air conditioner is a kind of electrical installation of indoor temperature being regulated and remained on the required situation of user.The artificial atmosphere effect of air conditioner is by cooling cycle system and the common completion of air circulation system; Carry out heat interchange to realize room temperature lowering or intensification, for people provide fresh, comfortable indoor air environment through round-robin cold-producing medium in its refrigeration system and indoor flow air.
The cooling cycle system of air conditioner comprises heat exchanger, compressor and throttling device.Air circulation system comprises fan and fan electromotor, inlet and outlet and air filter.The cooling cycle system of air conditioner and the operation of air circulation system are controlled by electrical apparatus control system; Under the control of electrical apparatus control system; Cold-producing medium in the air conditioner cooling cycle system absorbs heat and heat release in the circulation of compression one condensation one throttling one evaporation; And carry out heat interchange with room air by the fan forced flow of air circulation system, to realize room temperature lowering or intensification.And in the throttling device, extensively adopt kapillary, then when design, need flow capillaceous and drag characteristic are measured.
A kind of cold-producing medium kapillary flow detector is disclosed in China's application number 90223779.9; Its device mainly is to take into account mercury insurance etc. by source nitrogen, heat exchanger, operation valve, balanced device, resistance element, mercury pressure to constitute; Adopt the pressure amplification principle, the measure that utilizes temperature, pressure to compensate is voluntarily tested flow.
China's application number 02108956.6 discloses a kind of Electrometric measurer for flow resistance of capillary tube in pressure-type refrigerating system; Providing a kind of better simplyly changes caused pressure through gas flow and changes the gas circuit of coming electrical measurement capillary flow resistance state and the combined test structural shape of electrical measurement; It can provide numeral subsequently to show simply to the electrical measurement work that only just can accomplish the gas circuit fluctuations in discharge with a force-sensing sensor (gaseous tension sampling).
But in the prior art; Utilize endoporus restriction characteristic capillaceous more; Read the intermediate pressure difference with fixed inlet pressure through damper tube on the instrument and tested kapillary and reflect certain-length internal control resistance capillaceous, thereby in very short time, can judge discharge characteristic capillaceous, and when roughness different kapillary in same size inside is carried out conventional flow monitoring measurement result fully in margin tolerance; Promptly use existing method can't measure the variation of kapillary roughness; And for air-conditioning, the kapillary roughness will certainly exert an influence to refrigerant, exists than mistake when this just causes designing.
Summary of the invention
Technical matters to be solved by this invention is the shortcoming that overcomes prior art, and the proving installation of a kind of ability Validity Test capillary tube inner wall roughness and drag characteristic relation is provided.
The technical scheme that the present invention adopted is:
A kind of kapillary flow testing device comprises: be accommodated in the refrigerant fluid reservoir in the constant temperature oven; The retaining valve that is communicated with by the road with described fluid reservoir delivery outlet end; Be connected on the hand switch and the high voltage stabilizing valve at retaining valve rear portion successively; In order to the kapillary jig that tested kapillary is fixing; Parallel connection is arranged on inlet pressure transducer and the outlet pressure sensor near the refrigerant flow in the tested kapillary of kapillary jig two ends respectively; Be connected to back pressure side low pressure pressure maintaining valve, self-balancing type pressure control valve and the refrigerant recovering charging machine at kapillary jig rear portion in turn, and parallel connection is arranged on the back pressure pressure transducer at low pressure pressure maintaining valve rear portion.
Be recycle that guarantees refrigerant and the follow-on test formation that realizes continuously this experimental provision; Described refrigerant recovering charging machine is communicated with the refrigerant fluid reservoir by the road, and it can start to refrigerant fluid reservoir filling refrigerant when refrigerant fluid reservoir internal pressure is reduced to setting value.
Preferably, the series electrical magnet valve at described hand switch rear portion, it is opened or closes through time controller control for it, utilizes time controller to set zero-time and test duration, can effectively improve measuring accuracy and reduce the influence of personnel operation to the result.
And be respectively arranged with capillary inlet temperature sensor and capillary outlet temperature sensor in described kapillary jig both sides, all detect, can simulate duty capillaceous fully, improve the authenticity that realizes the result at pressure and temperature.
The invention has the beneficial effects as follows: this device constitutes a complete refrigerant loop and simulates duty capillaceous strictly according to the facts; Through to pressure and temperature controlling and measurement; Calculate refrigerant through tested Postcapillary pressure differential, and then reflect drag characteristic capillaceous.Experiment shows; The mass rate of refrigerant R22 reduces along with the increase of kapillary roughness; Kapillary than inner wall roughness 1.0 μ m; Roughness is that the kapillary unit interval flow of 5.4 μ m has reduced by 7.9%, can detect the variation of kapillary roughness fully through this method, and improves restriction effect capillaceous with this.
Description of drawings
Fig. 1 measures trial assembly interposed structure synoptic diagram for capillary flow of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is done further explain:
As shown in Figure 1, kapillary flow testing device of the present invention comprises: be accommodated in the refrigerant fluid reservoir 1 in the constant temperature oven 2; The retaining valve 3 that is communicated with successively by the road with described fluid reservoir 1 delivery outlet end; Be connected on the hand switch 4 at retaining valve 3 rear portions successively, refrigerant flow can opened or seal to described hand switch 4 to open or to stop flow rate test; Be connected on the high voltage stabilizing valve 7 of hand switch 4 back successively; In order to the kapillary jig 11 that tested kapillary 10 is fixed; Parallel connection is arranged on the inlet pressure transducer 9 and outlet pressure sensor 12 near the refrigerant flow in kapillary jig 11 tested kapillary two ends respectively; Be connected to back pressure side low pressure pressure maintaining valve 15, self-balancing type pressure control valve 17 and the refrigerant recovering charging machine 17 at kapillary jig 11 rear portions in turn, and parallel connection is arranged on the back pressure pressure transducer 14 at low pressure pressure maintaining valve 15 rear portions; The low pressure pressure maintaining valve wherein is set is self-balancing type pressure control valve 17 is so as to simulation air conditioner capillary outlet refrigerant state, and described refrigerant recovering charging machine 17 will pass through that refrigerant capillaceous is collected and the pressure refrigerant fluid reservoir 1 in gives refrigerant fluid reservoir 1 filling refrigerant to keep the certain pressure of its maintenance during less than threshold value.
Wherein said kapillary jig two ends are provided with the refrigerant pipe and are fixedly connected fast plug, so that quickly tested kapillary is communicated with the refrigerant pipe, its concrete structure changes many and realizes simply, in this its detailed structure that repeats no more.
Further; For improving the operability of this kapillary flow testing device; Being in series with successively at described hand switch 5 rear portions can it be opened or electromagnetic valve closed 6 by time controller 18 controls, when needs are tested in a period of time, through time controller setting-up time beginning automatically of can realizing testing and stop automatically; Reduce to test intensity, improve the accuracy of test data.
Simultaneously; For further simulating the real work operating mode of air-conditioning; Be respectively arranged with capillary inlet temperature sensor 8 and capillary outlet temperature sensor 13 in described kapillary jig 11 both sides, in order to detect kapillary two ends temperature, pressure, for experiment provides detailed data.
For the Real Time Observation experimental data, described pressure transducer and temperature sensor are connected in digital display end 20 respectively, the sensor test data in real time is shown, and when showing in real time, each is organized data storage so that subsequent analysis.
In concrete experiment, the fluid reservoir that liquid R22 refrigerant is housed is positioned in the heated at constant temperature case, refrigerant is heated to 45 ℃; Stablized 10 hours; Gaging pressure is stabilized in 1.74Mpa, considers in the fluid reservoir that pressure with the carrying out of experiment sorrow may take place and subtract, so before tested capillary inlet, high-pressure pressure-reducing valve is set; Stablizing capillary inlet pressure is 1.5MPa, with in minitype air conditioner, the enter the mouth situation of cold-producing medium of this state simulation kapillary; Through back pressure side capillaceous connect successively a low pressure pressure maintaining valve and a self-balancing type pressure control valve, simulate the capillary outlet refrigerant condition with this; The refrigerant recovering charging machine is set at last, reclaims refrigerant, and when fluid reservoir refrigerant insufficient pressure provides capillary inlet pressure, the refrigerant that reclaims is refilled in the fluid reservoir.
This device constitutes a complete refrigerant loop and simulates duty capillaceous strictly according to the facts, through to pressure and temperature controlling and measurement, calculates refrigerant through tested Postcapillary pressure differential, and then reflects drag characteristic capillaceous.Experiment shows that the mass rate of refrigerant R22 reduces along with the increase of kapillary roughness, and than the kapillary of inner wall roughness 1.0 μ m, roughness is that the kapillary unit interval flow of 5.4 μ m has reduced by 7.9%.Can detect the variation of kapillary roughness fully through this method, and improve restriction effect capillaceous with this.
The above only is a preferred implementation of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (5)
1. a kapillary flow testing device is characterized in that, comprising: be accommodated in the refrigerant fluid reservoir (1) in the constant temperature oven (2); The retaining valve (3) that is communicated with by the road with described fluid reservoir (1) delivery outlet end; Be connected on the hand switch (4) and the high voltage stabilizing valve (7) at retaining valve (3) rear portion successively; In order to the kapillary jig (11) that tested kapillary (10) is fixing; Parallel connection is arranged on inlet pressure transducer (9) and the outlet pressure sensor (12) near the refrigerant flow in the tested kapillary of kapillary jig (11) two ends respectively; Be connected to back pressure side low pressure pressure maintaining valve (15), self-balancing type pressure control valve (17) and the refrigerant recovering charging machine (17) at kapillary jig (11) rear portion in turn, and parallel connection is arranged on the back pressure pressure transducer (14) at low pressure pressure maintaining valve (15) rear portion.
2. kapillary flow testing device as claimed in claim 1 is characterized in that: refrigerant recovering charging machine (17) is communicated with refrigerant fluid reservoir (1) by the road.
3. according to claim 1 or claim 2 kapillary flow testing device, it is characterized in that: at described hand switch (5) rear portion series electrical magnet valve (6), it is controlled it through time controller (18) and opens or close.
4. kapillary flow testing device as claimed in claim 1 is characterized in that: be respectively arranged with capillary inlet temperature sensor (8) and capillary outlet temperature sensor (13) in described kapillary jig (11) both sides.
5. kapillary flow testing device as claimed in claim 1 is characterized in that: described pressure transducer and temperature sensor are connected with digital display end respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100747887A CN102706396A (en) | 2011-03-28 | 2011-03-28 | Capillary tube flow testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100747887A CN102706396A (en) | 2011-03-28 | 2011-03-28 | Capillary tube flow testing device |
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| Publication Number | Publication Date |
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| CN102706396A true CN102706396A (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100747887A Pending CN102706396A (en) | 2011-03-28 | 2011-03-28 | Capillary tube flow testing device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769676A (en) * | 2017-01-12 | 2017-05-31 | 中国石油大学(北京) | It is a kind of for improving and to measure the device and method of liquid fluidity |
| CN108036465A (en) * | 2017-11-20 | 2018-05-15 | 青岛海尔空调电子有限公司 | Pressure for air conditioner test adjusts simulator and its operating method |
| CN108845592A (en) * | 2018-08-20 | 2018-11-20 | 苏州佐竹冷热控制技术有限公司 | Coolant charging measuring system and coolant charging method |
| CN109092920A (en) * | 2018-08-09 | 2018-12-28 | 苏州菲利达铜业有限公司 | A kind of process for processing capillary |
| CN110470569A (en) * | 2019-09-04 | 2019-11-19 | 中国计量大学 | A kind of capillary pipeline vapour lock measuring device and measuring method |
| CN114414204A (en) * | 2021-12-31 | 2022-04-29 | 山东科技大学 | Device and method suitable for quickly measuring flow resistance of multi-section flow device |
| CN115574495A (en) * | 2022-11-18 | 2023-01-06 | 江苏拓米洛环境试验设备有限公司 | Capillary tube calibration device system and method for variable working condition and variable flow |
-
2011
- 2011-03-28 CN CN2011100747887A patent/CN102706396A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106769676A (en) * | 2017-01-12 | 2017-05-31 | 中国石油大学(北京) | It is a kind of for improving and to measure the device and method of liquid fluidity |
| CN108036465A (en) * | 2017-11-20 | 2018-05-15 | 青岛海尔空调电子有限公司 | Pressure for air conditioner test adjusts simulator and its operating method |
| CN109092920A (en) * | 2018-08-09 | 2018-12-28 | 苏州菲利达铜业有限公司 | A kind of process for processing capillary |
| CN108845592A (en) * | 2018-08-20 | 2018-11-20 | 苏州佐竹冷热控制技术有限公司 | Coolant charging measuring system and coolant charging method |
| CN108845592B (en) * | 2018-08-20 | 2024-02-27 | 苏州佐竹冷热控制技术有限公司 | Refrigerant filling measurement system and refrigerant filling method |
| CN110470569A (en) * | 2019-09-04 | 2019-11-19 | 中国计量大学 | A kind of capillary pipeline vapour lock measuring device and measuring method |
| CN114414204A (en) * | 2021-12-31 | 2022-04-29 | 山东科技大学 | Device and method suitable for quickly measuring flow resistance of multi-section flow device |
| CN114414204B (en) * | 2021-12-31 | 2023-08-22 | 山东科技大学 | Device and method suitable for rapid measurement of flow resistance of multi-restrictor |
| CN115574495A (en) * | 2022-11-18 | 2023-01-06 | 江苏拓米洛环境试验设备有限公司 | Capillary tube calibration device system and method for variable working condition and variable flow |
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Application publication date: 20121003 |