CN206556298U - Refrigerant mass fluxes measuring instrument and harvester in a kind of refrigeration system - Google Patents
Refrigerant mass fluxes measuring instrument and harvester in a kind of refrigeration system Download PDFInfo
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Abstract
The utility model provides refrigerant mass fluxes measuring instrument and harvester in a kind of refrigeration system, and measuring instrument includes：Pressure acquisition device；Temperature sampler, suction temperature including gathering the first compressor, the first of the delivery temperature of second compressor, two temperature sensors, gather the three-temperature sensor of the injection temperation of ejector refrigeration agent, collection first, 4th temperature sensor of the casing surface temperature of two compressors, gather the 5th temperature sensor of environment temperature, gather the first of refrigerant, the 6th of two supercooling temperatures, nine temperature sensors, gather the energy harvester of total consumed power, processor, data are adopted for obtaining, and refrigerant mass fluxes in refrigeration system are calculated according to the oil content of gathered data and refrigerant mixture.The program realized to the non-intrusion type of refrigerant mass fluxes, high-acruracy survey in refrigeration system, it is to avoid the harmful effect that measurement process is brought to refrigeration system, improves Consumer's Experience.
Description
Technical field
The utility model is related to refrigeration system analysis field, and in particular to refrigerant mass fluxes are surveyed in a kind of refrigeration system
Measure instrument and harvester.
Background technology
Refrigeration system is that a kind of heat by the object to be cooled with lower temperature is transferred to surrounding medium to obtain
The working medium that thermal procession change (energy is changed and heat is shifted) is participated in the machine of cold, refrigeration system is referred to as refrigerant.System
Cooling system is typically made up of compressor, condenser, evaporator and choke valve, and some refrigeration systems will also include intermediate pressure appearance
Device (such as flash evaporation or intercooler).With the development of human society, in many instances, it is necessary to which compressor operating exists
Under the operating mode of big compression ratio, and excessive discharge temperature, volume effect occur when compression ratio is larger for traditional single stage compress technology
The problems such as rate is relatively low, and quasi- twin-stage or Two-stage Compression technology in refrigeration systems must using above-mentioned most of problem can be solved,
Therefore the quasi- twin-stage with intermediate pressure container or Two-stage Compression unit are widely applied in refrigeration systems.
But due to the influence of the actual application environments such as weather conditions, installation site, service condition and loading condiction, above-mentioned band
There is larger difference with test data of the producer in enthalpy difference laboratory in the live runnability of the refrigeration system of intermediate pressure container
It is different.In order to ensure the actual motion performance of refrigeration system, the refrigeration system with intermediate pressure container is obtained in real time in actual motion
In state parameter be just particularly important.Refrigerant mass fluxes are to judge the important ginseng whether refrigeration system is normally run
Number, the metering system for refrigerant mass fluxes is obtained by coriolis mass flowmeters at present, but this method
Be not particularly suited for the in-site measurement of unit performance, itself main reason is that：Coriolis mass flowmeters need to be welded on condensation
On the liquid pipe of device outlet, it can be damaged to the refrigeration system unit being currently running, user's acceptance is poor.
Therefore, refrigerant mass fluxes measurement apparatus in the prior art how is overcome to destroy lacking for refrigeration system unit
Fall into, as a technical problem urgently to be resolved hurrily.
Utility model content
Therefore, the technical problems to be solved in the utility model is refrigerant mass fluxes measurement apparatus of the prior art
Refrigeration system unit can be destroyed, the normal operation of refrigeration system is influenceed.
In view of this, the first aspect of the utility model embodiment provides refrigerant mass fluxes in a kind of refrigeration system
Measuring instrument, the refrigeration system includes：Evaporator, the first compressor, the second compressor, condenser, intermediate pressure container and section
Flow valve, the entrance of outlet connection first compressor of the evaporator, the outlet connection of first compressor described the
The entrance of two compressors, the entrance of the outlet connection condenser of second compressor, the measuring instrument includes：Pressure is adopted
Storage, including：It is arranged on the first pressure sensor of first compressor air suction mouthful and is arranged on the second compressor row
The second pressure sensor of gas port, is respectively used to gather the pressure of inspiration(Pi) of the compressor and the exhaust pressure of second compressor
Power；Temperature sampler, including：First temperature sensor, is arranged on the evaporator outlet, for gathering first compressor
Suction temperature；Second temperature sensor, is arranged on the condenser inlet, the exhaust temperature for gathering second compressor
Degree；Three-temperature sensor, is arranged at the intermediate pressure container intermediate injection mouthful, holds for gathering from the intermediate pressure
The injection temperation of the gaseous refrigerant ejected in device；4th temperature sensor, is arranged on the first and second compression case body surface
Face, the casing surface temperature for gathering first and second compressor；5th temperature sensor, for gathering described first and second
Environment temperature around compressor；6th temperature sensor, is arranged at the condensator outlet, for gathering the condenser
First supercooling temperature of exit refrigerant；Energy harvester, including compressor horsepower sensor, for gathering described first,
The total consumed power of two compressors；Processor, with the pressure acquisition device, the Temperature sampler and the energy harvester
Connect respectively, for obtain the pressure acquisition device, the Temperature sampler and the energy harvester gathered data and
The oil content of refrigerant mixture in the refrigeration system, and according to the gathered data and the oil-containing of the refrigerant mixture
Rate calculates refrigerant mass fluxes in the refrigeration system.
Preferably, in addition to：First optical sensor, first optical sensor is arranged on the outlet of the condenser
Place, the first refractive index for gathering the refrigerant mixture for flowing through the condenser.
Preferably, in addition to：Second optical sensor, second optical sensor is arranged on the intermediate pressure container
Exit, for gather flow through the evaporator refrigerant mixture the second refractive index.
Preferably, the Temperature sampler also includes：7th temperature sensor, is arranged on the two-phase section of the evaporator,
First saturation temperature of refrigerant in two-phase section for gathering the evaporator；8th temperature sensor, is arranged on described cold
Second saturation temperature of refrigerant in the two-phase section of condenser, the two-phase section for gathering the condenser；And the processor
It is additionally operable to calculate evaporating pressure according to first saturation temperature, condensing pressure is calculated according to second saturation temperature.
Preferably, when the intermediate pressure container is intercooler, the Temperature sampler also includes：9th temperature
Sensor, is arranged on the exit of the intercooler, the second supercooling temperature for gathering the intercooler exit
Degree.
The second aspect of the utility model embodiment provides state parameter harvester, the system in a kind of refrigeration system
Cooling system includes：Evaporator, the first compressor, the second compressor, condenser, intermediate pressure container and choke valve, the evaporation
The entrance of outlet connection first compressor of device, the outlet of first compressor connects entering for second compressor
Mouthful, the entrance of the outlet connection condenser of second compressor, the harvester includes：Pressure acquisition device, including：
It is arranged on the first pressure sensor of first compressor air suction mouthful and is arranged on the second of first exhaust outlet of compressor
Pressure sensor, is respectively used to gather the pressure of inspiration(Pi) of the compressor and the pressure at expulsion of second compressor；Temperature is adopted
Storage, including：First temperature sensor, is arranged on the evaporator outlet, the air-breathing temperature for gathering first compressor
Degree；Second temperature sensor, is arranged on the condenser inlet, the delivery temperature for gathering second compressor；3rd
Temperature sensor, is arranged at the intermediate pressure container intermediate injection mouthful, is sprayed for gathering from the intermediate pressure container
The injection temperation of the gaseous refrigerant of injection；4th temperature sensor, is arranged on the first and second compressor housing surface, uses
In the casing surface temperature for gathering first and second compressor；5th temperature sensor, for gathering first and second compression
Environment temperature around machine；6th temperature sensor, is arranged at the condensator outlet, for gathering the condensator outlet
Locate the first supercooling temperature of refrigerant；Energy harvester, including compressor horsepower sensor, for gathering first and second pressure
The total consumed power of contracting machine.
Preferably, in addition to：First optical sensor, first optical sensor is arranged on the outlet of the condenser
Place, the first refractive index for gathering the refrigerant mixture for flowing through the condenser.
Preferably, in addition to：Second optical sensor, second optical sensor is arranged on the intermediate pressure container
Exit, for gather flow through the evaporator refrigerant mixture the second refractive index.
Preferably, the Temperature sampler also includes：7th temperature sensor, is arranged on the two-phase section of the evaporator,
First saturation temperature of refrigerant in two-phase section for gathering the evaporator；8th temperature sensor, is arranged on described cold
Second saturation temperature of refrigerant in the two-phase section of condenser, the two-phase section for gathering the condenser.
Preferably, when the intermediate pressure container is intercooler, the Temperature sampler also includes：9th temperature
Sensor, is arranged on the exit of the intercooler, the second supercooling temperature for gathering the intercooler exit
Degree.
The technical solution of the utility model has advantages below：
1st, refrigerant mass fluxes measuring instrument and harvester in the refrigeration system that the utility model is provided, by by pressure
Different sensors in collector, Temperature sampler, energy harvester set relevant position in refrigeration systems, in real time collection
Each correlation behavior parameter of refrigeration system, and state parameter is transmitted to processor, processor is according to each state parameter meter
The flow for obtaining refrigerant in the refrigeration system is calculated, in this way, realizing the non-intruding to refrigerant mass fluxes in refrigeration system
Formula, high-acruracy survey, compared with prior art, the program is simple to operate, can be achieved without destroying the original paper in refrigeration system
Data acquisition, it is to avoid the harmful effect that measurement process is brought to the normal operation of refrigeration system, improves Consumer's Experience.
2nd, refrigerant mass fluxes measuring instrument and harvester in the refrigeration system that the utility model is provided, accessed
The status data and its intermediate computations parameter of refrigeration system can be not only used for calculating refrigerant mass fluxes, can also be measurement
Other performance parameters of refrigeration system offer precise data reference.
Brief description of the drawings
, below will be right in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, describe below
In accompanying drawing be some embodiments of the present utility model, for those of ordinary skill in the art, do not paying creativeness
On the premise of work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 for the utility model embodiment 1 refrigeration system in refrigerant mass fluxes measuring instrument a block diagram；
Fig. 2A is a principle of the Two-stage Compression unit refrigeration system with flash evaporation of the utility model embodiment 1
Figure；
Fig. 2 B are a principle of the Two-stage Compression unit refrigeration system with intercooler of the embodiment of the present invention 1
Figure；
Fig. 3 for the utility model embodiment 2 refrigeration system in state parameter harvester a block diagram.
Reference：41- evaporators, the compressors of 421- first, the compressors of 422- second, 43- condensers, 44- flash evaporations,
45- choke valves, 46- intercoolers, 311- first pressure sensors, 312- second pressure sensors, the temperature of 321- first is passed
Sensor, 322 second temperature sensors, 323- three-temperature sensors, 324 the 4th temperature sensors, the TEMPs of 325- the 5th
Device, the temperature sensors of 326- the 6th, the temperature sensors of 327- the 7th, the temperature sensors of 328- the 8th, the TEMPs of 329- the 9th
Device, 33- energy harvesters, 34- processors, the optical sensors of 35- first, the optical sensors of 36- second.
Embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with accompanying drawing, it is clear that described
Embodiment is a part of embodiment of the utility model, rather than whole embodiments.Based on the embodiment in the utility model, sheet
The every other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
, it is necessary to which explanation, term " first ", " second " are only used for describing purpose in description of the present utility model, and
It is not intended that indicating or implying relative importance.
As long as in addition, technical characteristic involved in the utility model different embodiments disclosed below is each other
Not constituting conflict can just be combined with each other.
Embodiment 1
The present embodiment provides a kind of measuring instrument of refrigerant mass fluxes in refrigeration system, as shown in figure 1, device includes：
Processor 34 and the pressure acquisition device 31 being connected with processor 34, Temperature sampler 32 and energy harvester, in practical application
In, by the way that pressure acquisition device 31, Temperature sampler 32 and energy harvester are deployed in the refrigeration system respectively, to this
The operational factor of refrigeration system is gathered in real time, as shown in Figure 2 A, and the refrigeration system can include：Evaporator 41, first is pressed
Contracting machine 421, the second compressor 422, condenser 43, flash evaporation 44 (i.e. flash evaporation 44 is intermediate pressure container herein) and throttling
Valve 45, the entrance of the first compressor 421 of outlet connection of evaporator 41, the outlet of the first compressor 421 connects the second compressor
422 entrance, the entrance of the outlet connection condenser 43 of the second compressor 422, below with as shown in Figure 2 A with flash evaporation
Exemplified by 44 Two-stage Compression unit refrigeration system, to describe the technical scheme of the present embodiment in detail：
Pressure acquisition device 31, including：It is arranged on the first pressure sensor 311 of the air entry of the first compressor 421 and sets
In the second pressure sensor 312 of the exhaust outlet of the second compressor 422, it is respectively used to gather the pressure of inspiration(Pi) of the first compressor 421
With the pressure at expulsion of the second compressor 422, in actual applications, first and second pressure sensor herein can be according to actual need
The first compressor 421, the relevant position of the one or two compressor are deployed in respectively, to ensure the accuracy of gathered data.
Temperature sampler 32, including：First temperature sensor 321, is arranged on evaporator 41 and exports, and is pressed for gathering first
The suction temperature of contracting machine 421；Second temperature sensor 322, is arranged on the entrance of condenser 43, for gathering the second compressor 422
Delivery temperature；Three-temperature sensor 323, is arranged at intermediate pressure container intermediate injection mouthful, for gathering from intermediate pressure
The injection temperation of the gaseous refrigerant ejected in force container；4th temperature sensor 324, is arranged on first and second compressor
Surface of shell, for gathering first and second compressor housing surface temperature；5th temperature sensor 325, for gathering first and second
Environment temperature around compressor；6th temperature sensor 326, is arranged on the exit of condenser 43, for gathering condenser 43
First supercooling temperature of exit refrigerant；Herein, Temperature sampler 32 is mainly used in gathering relevant position in refrigeration system
Temperature parameter, using when can determine the particular location of each sensor according to actual needs, these temperature parameters can conduct
Calculate the reference factor of refrigerant mass fluxes.
It is as shown in Figure 2 B, described when the intermediate pressure container is intercooler 46 as a kind of preferred scheme
Temperature sampler 32 also includes：9th temperature sensor 329, is arranged on the exit of the intercooler 46, for gathering
Second supercooling temperature in the exit of intercooler 46, the second supercooling temperature is in the calculating of refrigerant mass fluxes herein
Available for the enthalpy for calculating the liquid refrigerant obtained in intercooler 46.
Energy harvester 33, including compressor horsepower sensor, for gathering the first compressor 421 and the second compressor
422 total consumed power, to be used as the major parameter for calculating refrigerant mass fluxes.
Processor 34, is connected, for obtaining respectively with pressure acquisition device 31, Temperature sampler 32 and energy harvester 33
Refrigerant mixture in the gathered data and refrigeration system of pressure acquisition device 31, Temperature sampler 32 and energy harvester 33
Oil content, it is possible to which refrigerant mass fluxes are calculated using calculation formula related in the prior art.As a kind of preferred
Scheme, processor 34, which is additionally operable to be calculated according to pressure at expulsion, obtains condensing pressure, is calculated according to pressure of inspiration(Pi) and obtains evaporating pressure.
Specifically, first, calculated according to pressure at expulsion and obtain condensing pressure, calculated according to pressure of inspiration(Pi) and obtain evaporating pressure, in reality
In, in error allowed band, the value of pressure of inspiration(Pi) can be typically approximately equal to evaporating pressure, the value of pressure at expulsion is near
Approximately equal to condensing pressure, then can calculate according to evaporating pressure and suction temperature and obtain the air entry of the first compressor 421 refrigeration
First air-breathing enthalpy h of agent1；Calculated according to condensing pressure and delivery temperature and obtain the exhaust outlet refrigerant of the second compressor 422
Second enthalpy h5；The 3rd enthalpy h for obtaining gaseous state saturation refrigerant in intermediate pressure container is calculated according to injection temperation3And liquid
4th enthalpy h of refrigerant7；It is flash evaporation 44 as shown in Figure 2 A in the intermediate pressure container as a kind of preferred scheme
When, the 3rd enthalpy h for obtaining gaseous state saturation refrigerant in flash evaporation 44 is calculated according to injection temperation3With the 4th of liquid refrigerant the
Enthalpy h4；It is used as a kind of preferred scheme, when the intermediate pressure container is intercooler 46 as shown in Figure 2 B, Ke Yigen
The 3rd enthalpy h for obtaining gaseous state saturation refrigerant in intercooler 46 is calculated according to injection temperation3, according to the second supercooling temperature meter
Calculate the 4th enthalpy h for obtaining liquid refrigerant in intercooler 464.Calculated and obtained according to the first supercooling temperature and condensing pressure
5th enthalpy h of the exit refrigerant of condenser 436；Calculated according to suction temperature, delivery temperature and obtain the second compressor 422
The enthalpy difference h of lubricating oil at the air entry of exhaust outlet and the first compressor 4215,oil-h1,oil；According to first, second compressor
422 casing surface temperature TcomAnd the first, second environment temperature T around compressor 422airCalculating obtains first and second compressor
With total heat exchange amount of external environmentSuch as heat exchange amount can be calculated using equation below
In above formula, a is first and second compressor housing and the convection transfer rate of surrounding environment, and visual site environment is chosen
(it can such as be chosen between 5~8, unit is W/m2K)；AcomFor the surface area of first and second compressor, unit is m2；σ is spoke
Boltzmann constant, 5.67 × 10-8 are penetrated, unit is W/m2K4.Finally, according to above-mentioned calculating obtain each intermediate parameters and
The total consumed power E of first compressor 421 and the second compressor 422comWith the oil content λ of refrigerant mixture (refrigerant herein
The oil content λ of mixture can be inquired about from database and obtained, the value typically between 0.03%~5%) calculate and freezed
Agent mass flow, specifically, can first be calculated using equation below and obtain the first refrigerant for flowing through the first compressor 421 mixing
The mass flow m of thingmix,low：
The mass flow for the second refrigerant mixture for obtaining flowing through the second compressor 422 is calculated using equation below
mmix,high：
And then the first refrigerant mass fluxes m for obtaining flowing through the first compressor 421 is calculated using equation belowr,low：
mr,low=mmix,low·(1-λ)
And the second refrigerant mass flow m for obtaining flowing through the second compressor 422 is calculated using equation belowr,high：
mr,high=mmix,high·(1-λ)
As a kind of preferred scheme, in addition to：First optical sensor, the refrigeration system for being reserved with optical sensor interface
System, by the way that the first optical sensor to be arranged on to the exit of condenser 43, can flow through the refrigeration of condenser 43 for gathering
The first refractive index of agent composition, the first refractive index can be used for the oil content for calculating refrigerant mixture, and it is to adopt in real time
The data of collection, can improve the accuracy of result of calculation.
As a kind of preferred scheme, in addition to：Second optical sensor, the refrigeration system for being reserved with optical sensor interface
Second optical sensor, can also be arranged on the exit of intermediate pressure container by system, and the system of evaporator 41 is flowed through for gathering
Second refractive index of refrigerant mixture, second refractive index can be used for the oil content for calculating refrigerant mixture, and it is real-time
The data of collection, can improve the accuracy of result of calculation.
As a kind of preferred scheme, processor 34, which is additionally operable to be calculated according to first refractive index and the second refractive index, to be freezed
The oil content of agent composition.The oil content of i.e. above-mentioned refrigerant mixture can be typically obtained by inquiring about database, also may be used
To gather the respective indices of refraction of refrigerant mixture in real time by high, the second optical sensor, and then calculate more accurate
Refrigerant mixture oil content.
As a kind of preferred scheme, Temperature sampler 32 also includes：7th temperature sensor 327, is arranged on evaporator 41
Two-phase section, the first saturation temperature of refrigerant in the two-phase section for gathering evaporator 41；8th temperature sensor 328, if
The two-phase section in condenser 43 is put, the second saturation temperature of refrigerant in the two-phase section for gathering condenser 43；And processing
Device 34 is additionally operable to calculate evaporating pressure according to the first saturation temperature, and condensing pressure is calculated according to the second saturation temperature.Make
The evaporating pressure and condensing pressure of cooling system can also be obtained by first and second saturation temperature, such as do not had in refrigeration systems
, can be with direct measurement first and second saturation temperature in the case of pressure sensor interface, and then can be calculated according to equation below
Obtaining evaporating pressure and condensing pressure, (evaporating pressure is identical with condensing pressure Computing Principle, can be calculated using same formula
Obtain)：
Ps=exp (a1+a2/(ts+a3))
In above formula, PsIt is evaporating pressure or condensing pressure, unit is Pascal；tsIt is that the first saturation temperature or second are full
And temperature, unit for degree Celsius；a1、a2、a3It is the Physical Constants relevant with refrigerant, it is possible to use relative computer software is intended
Conjunction is obtained.
In addition, the operational factor of the refrigeration system got in the present embodiment can also carry for the performance evaluation of refrigeration system
For abundant reference, such as according to these operational factors calculate in real time the refrigerating capacity for obtaining refrigeration system, heating capacity and
Energy Efficiency Ratio and other performance parameters, will not be repeated here.
Refrigerant mass fluxes measuring instrument in the refrigeration system that the present embodiment is provided, by by pressure acquisition device 31, temperature
Different sensors in collector 32, energy harvester 33 set relevant position in refrigeration systems, in real time collection refrigeration system
The operational factor of system, and operational factor is transmitted to processor 34, processor 34 calculates according to each operational factor and obtains the system
The flow of refrigerant in cooling system, is surveyed in this way, realizing to the non-intrusion type of refrigerant mass fluxes, high accuracy in refrigeration system
Amount, compared with prior art, the program is simple to operate, and data acquisition can be achieved without destroying the original paper in refrigeration system, keeps away
The harmful effect that measurement process is brought to the normal operation of refrigeration system is exempted from, Consumer's Experience has been improved, in addition, the program is obtained
The status data and its intermediate computations parameter for the refrigeration system got can be not only used for calculating refrigerant mass fluxes, can be with
Offered precise data reference for other performance parameters for measuring refrigeration system.
Embodiment 2
The present embodiment provides state parameter harvester 3 in a kind of refrigeration system, as shown in figure 3, harvester 3 includes：
Pressure acquisition device 31, Temperature sampler 32 and energy harvester 33, in actual applications, by by pressure acquisition device 31, temperature
Collector 32 and energy harvester 33 are deployed in the refrigeration system respectively, and the state parameter of the refrigeration system is carried out in real time
Collection, referring to pair with flash evaporation 44 (i.e. flash evaporation 44 is intermediate pressure container herein) in embodiment 1 as shown in Figure 2 A
Level compressor set refrigeration system, the refrigeration system includes：Evaporator 41, the first compressor 421, the second compressor 422, condenser
43rd, flash evaporation 44 and choke valve 45, the entrance of the first compressor 421 of outlet connection of evaporator 41, the first compressor 421 go out
The entrance of mouth the second compressor 422 of connection, the entrance of the outlet connection condenser 43 of the second compressor 422, specifically：
Pressure acquisition device 31, including：It is arranged on the first pressure sensor 311 of the air entry of the first compressor 421 and sets
In the second pressure sensor 312 of the exhaust outlet of the second compressor 422, it is respectively used to gather the pressure of inspiration(Pi) of the first compressor 421
With the pressure at expulsion of the second compressor 422, in actual applications, first and second pressure sensor herein can be according to actual need
The first compressor 421, the relevant position of the one or two compressor are deployed in respectively, to ensure the accuracy of gathered data.
Temperature sampler 32, including：First temperature sensor 321, is arranged on evaporator 41 and exports, and is pressed for gathering first
The suction temperature of contracting machine 421；Second temperature sensor 322, is arranged on the entrance of condenser 43, for gathering the second compressor 422
Delivery temperature；Three-temperature sensor 323, is arranged at intermediate pressure container intermediate injection mouthful, for gathering from intermediate pressure
The injection temperation of the gaseous refrigerant ejected in force container；4th temperature sensor 324, is arranged on first and second compression case
Body surface face, for gathering first and second compressor housing surface temperature；5th temperature sensor 325, is pressed for gathering first and second
Environment temperature around contracting machine；6th temperature sensor 326, is arranged on the exit of condenser 43, goes out for gathering condenser 43
First supercooling temperature of refrigerant at mouthful；Herein, Temperature sampler 32 is mainly used in gathering the temperature of relevant position in refrigeration system
Spend parameter, using when can determine the particular location of each sensor according to actual needs, these temperature parameters can be used as meter
Calculate the reference factor of refrigerant mass fluxes.
It is as shown in Figure 2 B, described when the intermediate pressure container is intercooler 46 as a kind of preferred scheme
Temperature sampler 32 also includes：9th temperature sensor 329, is arranged on the exit of the intercooler 46, for gathering
Second supercooling temperature in the exit of intercooler 46, the second supercooling temperature is in the calculating of refrigerant mass fluxes herein
Available for the enthalpy for calculating the liquid refrigerant obtained in intercooler 46.
Energy harvester 33, including compressor horsepower sensor, for gathering the first compressor 421 and the second compressor
422 total consumed power, to be used as the major parameter for calculating refrigerant mass fluxes.
As a kind of preferred scheme, in addition to：First optical sensor 35, the refrigeration for being reserved with optical sensor interface
System, can flow through condenser 43 by the way that the first optical sensor 35 to be arranged on to the exit of condenser 43 for gathering
The first refractive index of refrigerant mixture, the first refractive index can be used for the oil content for calculating refrigerant mixture, and it is in fact
When the data that gather, the accuracy of result of calculation can be improved.
As a kind of preferred scheme, in addition to：Second optical sensor 36, the refrigeration for being reserved with optical sensor interface
Second optical sensor 36, can also be arranged on the exit of intermediate pressure container by system, and evaporator 41 is flowed through for gathering
Refrigerant mixture the second refractive index, second refractive index can be used for calculate refrigerant mixture oil content, it is
The data gathered in real time, can improve the accuracy of result of calculation.
As a kind of preferred scheme, Temperature sampler 32 also includes：7th temperature sensor 327, is arranged on evaporator 41
Two-phase section, the first saturation temperature of refrigerant in the two-phase section for gathering evaporator 41；8th temperature sensor 328, if
The two-phase section in condenser 43 is put, the second saturation temperature of refrigerant in the two-phase section for gathering condenser 43；I.e. refrigeration is
The evaporating pressure and condensing pressure of system can also be obtained by first and second saturation temperature, referring specifically in embodiment 1 to the 7th,
The associated description of eight temperature sensors.
The state parameter of the refrigeration system got in the present embodiment can provide abundant for the performance evaluation of refrigeration system
Reference, such as calculated in real time according to these state parameters obtain the refrigerant mass fluxes of refrigeration system, refrigerating capacity,
Heating capacity and Energy Efficiency Ratio and other performance parameters, will not be repeated here.
State parameter harvester 3 in the refrigeration system that the present embodiment is provided, by the way that pressure acquisition device 31, temperature are adopted
Different sensors in storage 32, energy harvester 33 set relevant position in refrigeration systems, and refrigeration system is gathered in real time
State parameter, provide abundant reference for the performance evaluation of refrigeration system, compared with prior art, the program is not only
It is simple to operate, and refrigeration system to be measured need not be invaded, without interference with the running status of refrigeration system, and then it can obtain
More accurate gathered data, while refrigeration system state parameter precision is further improved, it is ensured that the peace of refrigeration system
Row for the national games.
Obviously, above-described embodiment is only intended to clearly illustrate example, and the not restriction to embodiment.For
For those of ordinary skill in the art, other various forms of changes or change can also be made on the basis of the above description
It is dynamic.There is no necessity and possibility to exhaust all the enbodiments.And the obvious change or change thus extended out
Among the dynamic protection domain created still in the utility model.
Claims (10)
1. a kind of refrigerant mass fluxes measuring instrument in refrigeration system, the refrigeration system includes：Evaporator, the first compressor,
Second compressor, condenser, intermediate pressure container and choke valve, the outlet of the evaporator connect entering for first compressor
Mouthful, the entrance of outlet connection second compressor of first compressor, the outlet connection of second compressor is described
The entrance of condenser, it is characterised in that the measuring instrument includes：
Pressure acquisition device, including：It is arranged on the first pressure sensor of first compressor air suction mouthful and is arranged on described the
The second pressure sensor of two exhaust outlet of compressor, is respectively used to gather the pressure of inspiration(Pi) of the compressor and second compression
The pressure at expulsion of machine；
Temperature sampler, including：First temperature sensor, is arranged on the evaporator outlet, for gathering first compression
The suction temperature of machine；Second temperature sensor, is arranged on the condenser inlet, the exhaust for gathering second compressor
Temperature；Three-temperature sensor, is arranged at the intermediate pressure container intermediate injection mouthful, for gathering from the intermediate pressure
The injection temperation of the gaseous refrigerant ejected in container；4th temperature sensor, is arranged on the shell of first and second compressor
Body surface face, the casing surface temperature for gathering first and second compressor；5th temperature sensor, for gathering described
First, the environment temperature around two compressors；6th temperature sensor, is arranged at the condensator outlet, described for gathering
First supercooling temperature of refrigerant at condensator outlet；
Energy harvester, including compressor horsepower sensor, the total consumed power for gathering first and second compressor；
Processor, is connected, for obtaining respectively with the pressure acquisition device, the Temperature sampler and the energy harvester
Freeze in the gathered data and the refrigeration system of the pressure acquisition device, the Temperature sampler and the energy harvester
The oil content of agent composition, and the refrigeration system is calculated according to the oil content of the gathered data and the refrigerant mixture
Refrigerant mass fluxes in system.
2. refrigerant mass fluxes measuring instrument in refrigeration system according to claim 1, it is characterised in that also include：The
One optical sensor, first optical sensor is arranged on the exit of the condenser, and the condensation is flowed through for gathering
The first refractive index of the refrigerant mixture of device.
3. refrigerant mass fluxes measuring instrument in refrigeration system according to claim 2, it is characterised in that also include：The
Two optical sensors, second optical sensor is arranged on the exit of the intermediate pressure container, and institute is flowed through for gathering
State the second refractive index of the refrigerant mixture of evaporator.
4. refrigerant mass fluxes measuring instrument in refrigeration system according to any one of claim 1 to 3, its feature exists
In the Temperature sampler also includes：7th temperature sensor, is arranged on the two-phase section of the evaporator, described for gathering
First saturation temperature of refrigerant in the two-phase section of evaporator；8th temperature sensor, is arranged on the two-phase section of the condenser,
Second saturation temperature of refrigerant in two-phase section for gathering the condenser.
5. the measuring instrument of refrigerant mass fluxes in refrigeration system according to any one of claim 1 to 3, its feature exists
In when the intermediate pressure container is intercooler, the Temperature sampler also includes：9th temperature sensor, is set
In the exit of the intercooler, the second supercooling temperature for gathering the intercooler exit.
6. a kind of state parameter harvester in refrigeration system, the refrigeration system includes：Evaporator, the first compressor, second
Compressor, condenser, intermediate pressure container and choke valve, the entrance of outlet connection first compressor of the evaporator,
The entrance of outlet connection second compressor of first compressor, the outlet of second compressor connects the condensation
The entrance of device, it is characterised in that the harvester includes：
Pressure acquisition device, including：It is arranged on the first pressure sensor of first compressor air suction mouthful and is arranged on described the
The second pressure sensor of one exhaust outlet of compressor, is respectively used to gather the pressure of inspiration(Pi) of the compressor and second compression
The pressure at expulsion of machine；
Temperature sampler, including：First temperature sensor, is arranged on the evaporator outlet, for gathering first compression
The suction temperature of machine；Second temperature sensor, is arranged on the condenser inlet, the exhaust for gathering second compressor
Temperature；Three-temperature sensor, is arranged at the intermediate pressure container intermediate injection mouthful, for gathering from the intermediate pressure
The injection temperation of the gaseous refrigerant ejected in container；4th temperature sensor, is arranged on the shell of first and second compressor
Body surface face, the casing surface temperature for gathering first and second compressor；5th temperature sensor, for gathering described
First, the environment temperature around two compressors；6th temperature sensor, is arranged at the condensator outlet, described for gathering
First supercooling temperature of refrigerant at condensator outlet；
Energy harvester, including compressor horsepower sensor, the total consumed power for gathering first and second compressor.
7. state parameter harvester in refrigeration system according to claim 6, it is characterised in that also include：First light
Sensor is learned, first optical sensor is arranged on the exit of the condenser, the condenser is flowed through for gathering
The first refractive index of refrigerant mixture.
8. state parameter harvester in the refrigeration system according to claim 6 or 7, it is characterised in that also include：Second
Optical sensor, second optical sensor is arranged on the exit of the intermediate pressure container, is flowed through for collection described
Second refractive index of the refrigerant mixture of evaporator.
9. state parameter harvester in the refrigeration system according to claim 6 or 7, it is characterised in that the temperature
Collector also includes：7th temperature sensor, is arranged on the two-phase section of the evaporator, the two-phase for gathering the evaporator
First saturation temperature of refrigerant in area；8th temperature sensor, is arranged on the two-phase section of the condenser, described for gathering
Second saturation temperature of refrigerant in the two-phase section of condenser.
10. state parameter harvester in the refrigeration system according to claim 6 or 7, it is characterised in that in described
Between pressure vessel be intercooler when, the Temperature sampler also includes：9th temperature sensor, is arranged on the centre cold
But the exit of device, the second supercooling temperature for gathering the intercooler exit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109654652A (en) * | 2018-11-17 | 2019-04-19 | 华中科技大学 | A kind of air conditioner cooling/heating amount prediction technique based on data mining technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109654652A (en) * | 2018-11-17 | 2019-04-19 | 华中科技大学 | A kind of air conditioner cooling/heating amount prediction technique based on data mining technology |
| CN109654652B (en) * | 2018-11-17 | 2020-05-19 | 华中科技大学 | Air conditioner refrigeration/heat prediction method based on data mining technology |
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