CN104374591B - A kind of ability measurement device of electric expansion valve - Google Patents

A kind of ability measurement device of electric expansion valve Download PDF

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Publication number
CN104374591B
CN104374591B CN201410642573.4A CN201410642573A CN104374591B CN 104374591 B CN104374591 B CN 104374591B CN 201410642573 A CN201410642573 A CN 201410642573A CN 104374591 B CN104374591 B CN 104374591B
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expansion valve
electric expansion
air
heat
ball valve
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CN104374591A (en
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顾泽波
骆毅
刘芳
丁益
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China Electrical Appliance Research Institute Co., Ltd.
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China National Electric Apparatus Research Institute Co Ltd
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Abstract

The invention discloses the ability measurement device of a kind of electric expansion valve, including air conditioner refrigerating heating analog portion, air-conditioning nominal condition regulation part and air conditioning system parameter measurement part.The ability measurement device of the present invention simulates electric expansion valve system in actual air conditioning system by air conditioner refrigerating heating analog portion and forms, and by air-conditioning nominal condition regulation part, each building block of cold heating analog portion can be adjusted to air-conditioning nominal condition condition, thus each temperature and pressure parameter calculated needed for tested electric expansion valve ability value is recorded by air conditioning system parameter measurement part, therefore the ability measurement that ability measurement device is electric expansion valve of the present invention provides the test platform that conformance with standard specifies.

Description

A kind of ability measurement device of electric expansion valve
Technical field
The present invention relates to the ability measurement device of a kind of electric expansion valve.
Background technology
Electric expansion valve is the important composition parts of air conditioning system, and its ability value has great shadow to air conditioning system Ring.JIS B 8619 " heating power expansion valve test method ", " cooling air conditioner direct driving type electronic is swollen for JB/T10212 Swollen valve ", Q/SHC 003-2010 " air-conditioning and similar applications direct driving type electronic expansion valve ", JB/T10386-2002 " domestic and similar applications air conditioner electronic expansion valve " and JB/T 3548 " cooling heating power expansion valve ", these five In standard, all ability value measurements to electric expansion valve dictate, and this most only defines the operational approach of measurement But do not propose with what equipment to carry out, and existing measuring table all fails to comply with requirement.
Summary of the invention
The technical problem to be solved is: provide the ability measurement device of a kind of electric expansion valve.
Solving above-mentioned technical problem, the technical solution adopted in the present invention is as follows:
A kind of ability measurement device of electric expansion valve, it is characterised in that: described ability measurement device includes sky Adjust refrigerating and heating systems analog portion, air-conditioning nominal condition regulation part and air conditioning system parameter measurement part;
Described air conditioner refrigerating heating analog portion includes frequency-changeable compressor, oil eliminator, condenser, liquid storage Device, the first and second ball valves, heat-exchanger rig and gas-liquid separator;Described air-conditioning nominal condition regulation part Including double-pipe cooler and heat tape;Described air conditioning system parameter measurement part include mass flowmenter, First and second platinum resistance and the first to the 3rd pressure transmitter;
One end of described first ball valve is for connecting the import of tested electric expansion valve, one end of described second ball valve For connecting the outlet of tested electric expansion valve, entering of the air vent connection oil eliminator of described frequency-changeable compressor Mouthful, the refrigerant inlet of the outlet condenser of oil eliminator, the refrigerant outlet of described condenser leads to successively Crossing reservoir and connect the other end of described first ball valve with double-pipe cooler, described heat tape is arranged on sleeve pipe The surface of formula cooler, the refrigerant inlet of the other end connection heat-exchanger rig of described second ball valve, described heat exchange The refrigerant outlet of device is by the air inlet of gas-liquid separator connection frequency-changeable compressor;
Described mass flowmenter is arranged in the connecting pipe between double-pipe cooler and the first ball valve, and described The test side of one platinum resistance and the first pressure transmitter is installed between the first ball valve and tested electric expansion valve Connecting pipe in, described second pressure transmitter is arranged on the company between tested electric expansion valve and the second ball valve In threading a pipe, described second platinum resistance and the 3rd pressure transmitter be installed in heat-exchanger rig and gas-liquid separator it Between connecting pipe in.
As one embodiment of the present invention, described heat-exchanger rig is calorimeter or ethylene glycol heat exchanger.
Compared with prior art, the method have the advantages that
The ability measurement device of the present invention simulates electric expansion valve by air conditioner refrigerating heating analog portion System composition in actual air conditioning system, and can be by air-conditioning nominal condition regulation part by cold heating mould Each building block of plan part is adjusted to air-conditioning nominal condition condition, thus by air conditioning system parameter measurement portion Divide and record each temperature and pressure parameter calculated needed for tested electric expansion valve ability value, the therefore energy of the present invention Force measuring device is that the ability measurement of electric expansion valve provides the test platform that conformance with standard specifies.
Accompanying drawing explanation
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings:
Fig. 1 is one of composition frame chart of ability measurement device of the present invention;
Fig. 2 is the two of the composition frame chart of the ability measurement device of the present invention.
Detailed description of the invention
As it is shown in figure 1, the ability measurement device of the electric expansion valve of the present invention, including air conditioner refrigerating heating Analog portion, air-conditioning nominal condition regulation part and air conditioning system parameter measurement part.
Air conditioner refrigerating heating analog portion includes frequency-changeable compressor COMP, oil eliminator OS, condenser COND, reservoir RE, the first and second ball valve BV1~BV2, heat-exchanger rig CAL and gas-liquid separation Device LS;Air-conditioning nominal condition regulation part includes double-pipe cooler SUB and heat tape SC;Air-conditioning system System parameter measurement part includes mass flowmenter F, the first and second platinum resistance T1~T2 and first to the 3rd pressure Power transmitter P1~P3;Wherein, heat-exchanger rig CAL selects calorimeter.
One end of first ball valve BV1 is for connecting the import of tested electric expansion valve EEV, the second ball valve BV2 One end for connecting the outlet of tested electric expansion valve EEV, the air vent connection of frequency-changeable compressor COMP The import of oil eliminator OS, the refrigerant inlet of the outlet condenser COND of oil eliminator OS, cold The refrigerant outlet of condenser COND passes sequentially through reservoir RE and connects the first ball with double-pipe cooler SUB The other end of valve BV1, heat tape SC is arranged on the surface of double-pipe cooler SUB, the second ball valve BV2 The other end connection heat-exchanger rig CAL refrigerant inlet, the refrigerant outlet of heat-exchanger rig CAL passes through gas The air inlet of liquid/gas separator LS connection frequency-changeable compressor COMP;
Mass flowmenter F is arranged on the connecting pipe between double-pipe cooler SUB and the first ball valve BV1 In, the test side of the first platinum resistance T1 and the first pressure transmitter P1 is installed in the first ball valve BV1 and is subject to Surveying in the connecting pipe between electric expansion valve EEV, the second pressure transmitter P2 is arranged on tested electronic expansion In connecting pipe between valve EEV and the second ball valve BV2, the second platinum resistance T2 and the 3rd pressure transmitter P3 is installed in the connecting pipe between heat-exchanger rig CAL and gas-liquid separator LS.
The operation principle of the ability measurement device of the following description present invention:
(1) above-mentioned air conditioner refrigerating heating analog portion draws up air-conditioning by the mating die of each building block The refrigeration of system and heat flow process, the function of its each building block is as follows:
1.1, frequency-changeable compressor COMP
Frequency-changeable compressor COMP is a vortex frequency-changeable compressor, and model is E405DHD-36D2G, Refrigerating capacity is 11.8KW, and it is the heart of air conditioner refrigerating heating, provides power in systems, it is possible to from The gas refrigerant of low-temp low-pressure is sucked compressor low pressure chamber by vaporizer, is compressed into the gaseous state system of High Temperature High Pressure Condenser delivered to by cryogen, makes cold-producing medium be repeated continuously circulation in system pipeline, to reach refrigeration or to heat effect Really.
1.2, oil eliminator OS
Oil eliminator OS is the bin of a cartridge type, and model is 925R, and capacity is 2.3L, mainly will The oil of compressor air-discharging tube refrigerant entrained with separates, and stores, by being connected to oil eliminator The pipeline of bottom, then oil is sent back on the suction nozzle of compressor, enter in compressor, constantly circulate to rise Effect to lubrication.
1.3, condenser COND
Condenser COND is a double pipe heat exchanger, and model is: DT-5205, and exchange capability of heat is 16KW, Effect in systems is mainly used in the cold-producing medium of cooling down high-temperature high pressure in cooling flow, or is heating flow process In add warm refrigerant.
1.4, reservoir RE
Reservoir RE is a pressure resistant vessel sealed, and can regulate system by observation liquid-sighting glass liquid level cold The charging amount of matchmaker.
1.5, the heat-exchanger rig CAL of calorie meter is used
Calorie meter is a thermal pressure container sealed, and is mainly used to control the air-breathing of frequency-changeable compressor COMP Temperature.Its inner upper is equipped with the vaporizer of refrigeration system, and vaporizer is rib-type coil heat exchanger.Calorie meter Bottom is equipped with electric heating tube, and the caloric value of electric heating tube is 3KW × 6=18KW, is set to three groups, the One group of 5KW, second group of 10KW, the 3rd group is 17.5KW, selects voluntarily by test valve member capacity requirement. Heat transferring medium within calorie meter is R123.Calorie meter neutralizes cryogenic refrigeration by heat release in cooling flow The heat of agent, thus simulate the indoor set temperature-fall period to space in air conditioning system, calorie meter is in heating flow process Neutralized the heat of low-temperature refrigerant by heat absorption, thus simulate the indoor set intensification to space in air conditioning system Journey.
1.6, gas-liquid separator LS
Gas-liquid separator LS is a pressure resistant vessel sealed, and model is A-AS5137, is mainly used to prevent When the suction end of frequency-changeable compressor COMP occurs back liquid phenomenon, carry out separating to gaseous state cold by liquid coolant Matchmaker, again returns to compressor low pressure chamber, it is to avoid returns liquid and causes liquid hammer.It is arranged over air inlet pipe and escape pipe, Air inlet pipe inserts the bottom close to container, and escape pipe inserts above container, and when there being back liquid phenomenon, coolant is from entering Trachea flows into and sinks to bottom, from outflow of giving vent to anger after separated one-tenth gaseous coolant, returns to compressor.
(2) air-conditioning nominal condition regulation part is for by each of above-mentioned air conditioner refrigerating heating analog portion Building block is adjusted to the air-conditioning nominal condition condition that standard specifies, to meet electric expansion valve ability measurement standard In relevant regulations, the function of its each building block is as follows:
2.1, double-pipe cooler SUB and heat tape SC
Double-pipe cooler SUB and heat tape SC is for exchanging the refrigeration throttled into electric expansion valve EEV Agent temperature, wherein, double-pipe cooler SUB uses bushing type coil pipe, outer layer upper entering and lower leaving coolant, internal layer Bottom in and top out cooling water, subcooler surface is installed heat tape SC again after twining insulating cement, is set 12 groups altogether, often group Power 0.2KW, total electrical heating ability is 2.4KW, and employing ethylene glycol is heat transferring medium.
It addition, the realization of air-conditioning nominal condition condition also needs to be controlled by the water temperature of regulation condenser COND The inlet pressure of tested electric expansion valve EEV, is adjusted by the operating frequency changing frequency-changeable compressor COMP Save the outlet pressure of tested electric expansion valve EEV, regulate control heat exchange dress by controlling heat-exchanger rig CAL Put the refrigerant temperature of CAL outlet.
The air-conditioning nominal condition condition that above-mentioned standard specifies is specific as follows:
(this condensing pressure can be by for the condensing pressure corresponding when being 40 DEG C of electric expansion valve EEV: condensation temperature First pressure transmitter P1 records), the liquid refrigerant temperature entering electric expansion valve EEV is 38 DEG C, steams Send out evaporating pressure (this evaporating pressure can be recorded) corresponding when temperature is 5 DEG C by the second pressure transmitter P2, The suction temperature of compressor is 15 DEG C (this suction temperature can be recorded by the second platinum resistance T2), and aperture is 65% Standard-sized sheet pulse situation, the refrigerant mass fluxes flowing through expansion valve and electric expansion valve EEV porch liquid ratio Enthalpy and saturated vapor under evaporating temperature are than the product of the difference of enthalpy.
(3) occupation mode utilizing this device that electric expansion valve is carried out ability measurement is as follows:
First, in the case of closing the first and second ball valve BV1~BV2, by tested electric expansion valve EEV Load instinct force measuring device, and reopen the first and second ball valve BV1~BV2 in the completed;
Secondly, specifying according to standard, this device can be under cooling flow or heat under flow process tested electronics Expansion valve EEV carries out ability measurement.Under cooling flow and heat under flow process, cold-producing medium is in air conditioner refrigerating system The flow direction of hot systems analog portion is: cold-producing medium is discharged from the air vent of frequency-changeable compressor COMP, successively The import of tested electric expansion valve EEV is flowed into through oil eliminator OS, condenser COND and reservoir RE, The cold-producing medium that tested electric expansion valve EEV outlet is flowed out passes sequentially through heat-exchanger rig CAL and gas-liquid separator LS returns to the air entry of frequency-changeable compressor COMP, completes circulation.Wherein, to the first and second ball valves The switching manipulation of BV1~BV2, both can be realized by the adjusting apparatus of device peripheral hardware, it is also possible to directly pass through people Work operation realizes.
Again, after air conditioner refrigerating heating analog portion enters refrigeration or heats flow process, by air-conditioning name Each building block of regulating working conditions part is by each composition portion of above-mentioned air conditioner refrigerating heating analog portion Part is adjusted to air-conditioning nominal condition condition.Such as, by the first platinum resistance in air conditioning system parameter measurement part T1 can record the Current Temperatures of tested electric expansion valve EEV import in real time, according to this Current Temperatures and air-conditioning The deviation of nominal condition condition, can make to be subject to by controlling double-pipe cooler SUB and heat tape SC The refrigerant temperature surveying electric expansion valve EEV import reaches the requirement that air-conditioning nominal condition condition specifies;And it is right The remaining part of air-conditioning nominal condition regulation part and regulation condenser COND, frequency-changeable compressor COMP With the regulation of heat-exchanger rig CAL, record referring again to respective sensor in air conditioning system parameter measurement part Data are carried out, and their concrete regulative mode is described in above-mentioned 2) point, does not repeats them here. Wherein, all parts, regulation condenser COND, the frequency-changeable compressor to air-conditioning nominal condition regulation part COMP and the regulation of heat-exchanger rig CAL, both can be realized by the adjusting apparatus of device peripheral hardware, it is also possible to straight Connected manual operation to realize.
Finally, each building block in air conditioner refrigerating heating analog portion all reaches air-conditioning nominal condition bar After part, record each composition data measured by sensor of now air conditioning system parameter measurement part, by standard Regulation be respectively adopted auxiliary refrigerating medium effusion meter method and fluid flowmeter method by following electric expansion valve EEV master Side capacity formula and auxiliary side capacity formula calculate the ability value of tested electric expansion valve EEV, two calculating When the ability value gone out is in the range of error of regulation, taking two ability value meansigma methodss calculated is that tested electronics is swollen The ability value of swollen valve EEV.
EEV master capacity formula:
Calorie meter ability/(entrance enthalpy of the outlet enthalpy tested electric expansion valve EEV of heat-exchanger rig CAL Value) * (saturated gas name enthalpy-tested electronic expansion that tested electric expansion valve EEV outlet pressure is corresponding The entrance name enthalpy of valve EEV)
Wherein, calorie meter ability by the power of employing heat-exchanger rig CAL, this calorie meter ability=calorie meter electricity Heating power+leaking heat, they are the parameter that calorie meter originally has;The outlet enthalpy of heat-exchanger rig CAL is by Temperature that two platinum resistance T2 record and the pressure that the 3rd pressure transmitter P3 records are by tabling look-up acquisition, tested Temperature that the entrance enthalpy of electric expansion valve EEV is recorded by the first platinum resistance T1 and the first pressure transmitter P1 The pressure recorded is by tabling look-up acquisition, and the saturated gas that tested electric expansion valve EEV outlet pressure is corresponding is nominal Enthalpy is by set point pressure by tabling look-up acquisition, and the entrance name enthalpy of tested electric expansion valve EEV is by setting Value temperature and set point pressure are by tabling look-up acquisition.
EEV auxiliary side ability:
(saturated gas name enthalpy-tested electronics that the outlet pressure of tested electric expansion valve EEV is corresponding is swollen The entrance name enthalpy of swollen valve EEV) * refrigerant flow
Wherein, the saturated gas name enthalpy that tested electric expansion valve EEV outlet pressure is corresponding is by setting value pressure Power is by tabling look-up acquisition, and the entrance name enthalpy of tested electric expansion valve EEV is by set-point temperature and setting value Pressure is by tabling look-up acquisition, and refrigerant flow is recorded by mass flowmenter F.
Through test, the ability measurement device of the present invention can reach following ability measurement precision:
1) repeatability precision and stability are within ± 1%;
2) major-minor lateral deviation is poor: major-minor lateral deviation is poor≤and 2%.
4) stability controls within 1%.
The gateway temperature of electric expansion valve and pressure design technical specification and control accuracy:
A inlet temperature: 25~60 DEG C ± 0.2 DEG C (degree of supercooling is 2~10 DEG C);
B inlet pressure: 1.65~3.80MPa ± 0.015MPa (corresponding saturation temperature 25~60 DEG C);
C outlet temperature :-20~25 DEG C ± 0.2 DEG C;
D outlet pressure: 0.33~1.09MPa ± 0.005MPa (corresponding saturation temperature-25~10 DEG C);
The present invention does not limit to and above-mentioned detailed description of the invention, according to foregoing, according to the ordinary skill of this area Knowledge and customary means, without departing under the present invention above-mentioned basic fundamental thought premise, the present invention can also make The equivalent modifications of other various ways, replace or change, all fall among protection scope of the present invention.Such as join See that Fig. 2, above-mentioned heat-exchanger rig CAL also can be selected for ethylene glycol heat exchanger, it is achieved the heat of cold-producing medium neutralizes.

Claims (2)

1. the ability measurement device of an electric expansion valve, it is characterised in that: described ability measurement device includes Air conditioner refrigerating heating analog portion, air-conditioning nominal condition regulation part and air conditioning system parameter measurement part;
Described air conditioner refrigerating heating analog portion include frequency-changeable compressor (COMP), oil eliminator (OS), Condenser (COND), reservoir (RE), the first ball valve (BV1), the second ball valve (BV2), heat exchange dress Put (CAL) and gas-liquid separator (LS);Described air-conditioning nominal condition regulation part includes that bushing type is cold But device (SUB) and heat tape (SC);Described air conditioning system parameter measurement part includes mass flowmenter (F), the first platinum resistance (T1), the second platinum resistance (T2) and the first pressure transmitter (P1), second Pressure transmitter (P2) and the 3rd pressure transmitter (P3);
One end of described first ball valve (BV1) is used for connecting the import of tested electric expansion valve (EEV), institute The one end stating the second ball valve (BV2) is used for connecting the outlet of tested electric expansion valve (EEV), described frequency conversion The import of air vent connection oil eliminator (OS) of compressor (COMP), oil eliminator (OS) goes out The refrigerant inlet of mouth connection condenser (COND), the refrigerant outlet of described condenser (COND) depends on Secondary connected the another of described first ball valve (BV1) with double-pipe cooler (SUB) by reservoir (RE) One end, described heat tape (SC) is arranged on the surface of double-pipe cooler (SUB), described second ball The refrigerant inlet of other end connection heat-exchanger rig (CAL) of valve (BV2), described heat-exchanger rig (CAL) Refrigerant outlet by gas-liquid separator (LS) connection frequency-changeable compressor (COMP) air inlet;
Described mass flowmenter (F) is arranged between double-pipe cooler (SUB) and the first ball valve (BV1) Connecting pipe in, the test side of described first platinum resistance (T1) and the first pressure transmitter (P1) is all pacified It is contained in the connecting pipe between the first ball valve (BV1) and tested electric expansion valve (EEV), described second Pressure transmitter (P2) is arranged on the company between tested electric expansion valve (EEV) and the second ball valve (BV2) In threading a pipe, described second platinum resistance (T2) and the 3rd pressure transmitter (P3) are installed in heat-exchanger rig (CAL) in the connecting pipe and between gas-liquid separator (LS).
Ability measurement device the most according to claim 1, it is characterised in that: described heat-exchanger rig (CAL) For calorimeter or ethylene glycol heat exchanger.
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Publication number Priority date Publication date Assignee Title
CN105181313A (en) * 2015-08-25 2015-12-23 天津商业大学 Performance contrast experiment table of thermal expansion valves
CN105841899B (en) * 2016-03-29 2018-04-20 中国计量学院 The static degree of superheat automatic testing equipment of F valves and test method
CN110553835B (en) * 2019-09-26 2021-08-17 广州兰石技术开发有限公司 Expansion valve performance test system and refrigeration valve performance test system

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