CN105423667B - Control method of compressor system and compressor system - Google Patents
Control method of compressor system and compressor system Download PDFInfo
- Publication number
- CN105423667B CN105423667B CN201510869565.8A CN201510869565A CN105423667B CN 105423667 B CN105423667 B CN 105423667B CN 201510869565 A CN201510869565 A CN 201510869565A CN 105423667 B CN105423667 B CN 105423667B
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- compressor
- expansion valve
- electric expansion
- aperture
- pressure
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 230000003434 inspiratory effect Effects 0.000 claims description 55
- 238000011144 upstream manufacturing Methods 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 7
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 abstract description 21
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/022—Compressor control arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method of a compressor system and the compressor system, wherein the control method of the compressor system comprises the following steps: acquiring operation parameters of the compressor, and determining the suction volume of the compressor according to the operation parameters; acquiring the opening degree of the electronic expansion valve; and adjusting the opening degree of the electronic expansion valve according to the opening degree and the suction amount of the electronic expansion valve. The control method of the compressor system and the compressor system effectively solve the problem that liquid is carried in the air suction of the compressor due to the fact that the liquid supply amount of the electronic expansion valve is not matched with the air suction amount of the compressor in the prior art.
Description
Technical field
The present invention relates to refrigeration technology field, in particular to the control method and compressor of a kind of compressor assembly
System.
Background technology
In the prior art, one of the system important composition part of electric expansion valve as compressor steam circulation, is served
Throttling and the effect of regulation liquid supply rate, vital effect is played to the unit performance of compressor assembly, though electric expansion valve
So there is considerable flexibility, but controlling for existing electric expansion valve is joined using discharge superheat and suction superheat to be main
Examine, realize control of the electricity to sub- expansion valve using pid algorithm, but this electric expansion valve has scope in control aspect
The shortcomings that narrow, and control accuracy small in adjustable extent internal variable is not high enough, causes the liquid supply rate and compressor of electric expansion valve
Inspiratory capacity mismatch, cause compressor air suction band liquid.
The content of the invention
The control method and compressor assembly of a kind of compressor assembly are provided in the embodiment of the present invention, to solve prior art
The liquid supply rate of middle electric expansion valve and the inspiratory capacity of compressor mismatch, and cause the problem of compressor air suction is with liquid.
To achieve the above object, the invention provides a kind of control method of compressor assembly, compressor assembly include according to
Condenser, electric expansion valve, evaporator and the compressor of secondary connection, it is characterised in that control method includes：Obtain compressor
Operational factor, the inspiratory capacity of compressor is determined according to operational factor；Obtain the aperture of electric expansion valve；According to electric expansion valve
Aperture and inspiratory capacity, adjust the aperture of electric expansion valve.
Further, the step of aperture for obtaining electric expansion valve, includes：Obtain the first pressure of electric expansion valve upstream
Value and the second pressure value in electric expansion valve downstream；Opening for electric expansion valve is determined according to first pressure value and second pressure value
Degree.
Further, it is further comprising the steps of：Opening for inspiratory capacity and electric expansion valve is established according to the inspiratory capacity of compressor
Corresponding relation between degree.
Further, the operational factor of compressor includes following at least one：Compressor current, compressor load, pressure
Contracting machine pressure of inspiration(Pi), Compressor Discharge Pressure.
Further, control method also includes：The first temperature value of chilled water in evaporator is obtained, is obtained cold in condenser
But the second temperature value of water；According to the first temperature value, second temperature value, the aperture of electric expansion valve and inspiratory capacity, adjustment electricity
The aperture of sub- expansion valve.
According to another aspect of the present invention, there is provided a kind of compressor assembly, compressor assembly include what is be sequentially communicated
Condenser, electric expansion valve, evaporator and compressor, in addition to：Controller, with compressing mechatronics, controller is used to obtain
The operational factor of compressor, and determine according to operational factor the inspiratory capacity of compressor；Controller electrically connects with electric expansion valve, control
Device processed is additionally operable to obtain the aperture of electric expansion valve；Controller is used for aperture and inspiratory capacity according to electric expansion valve, controller
The aperture of control electric expansion valve is adjusted.
Further, compressor assembly also includes：First pressure sensor, first pressure sensor are arranged on electronic expansion
The upstream of valve, first pressure sensor are used for the first pressure value for obtaining electric expansion valve upstream；Second pressure sensor, second
Pressure sensor is arranged on the downstream of electric expansion valve, and second pressure sensor is used for the second pressure for obtaining electric expansion valve downstream
Force value；Controller electrically connects with first pressure sensor and second pressure sensor, controller be used for receive first pressure value and
Second pressure value, and according to first pressure value and the aperture of second pressure value control electric expansion valve.
Further, controller be additionally operable to according to the inspiratory capacity of compressor establish inspiratory capacity and electric expansion valve aperture it
Between corresponding relation.
Further, the operational factor of compressor includes following at least one：Compressor current, compressor load, pressure
Contracting machine pressure of inspiration(Pi), Compressor Discharge Pressure.
Further, compressor assembly also includes：First temperature sensor, is arranged in evaporator, the first TEMP
Device is used for the first temperature value for obtaining chilled water in evaporator；Second temperature sensor, it is arranged in condenser, second temperature passes
Sensor is used for the second temperature value for obtaining cooling water in condenser；Controller and the first temperature sensor and second temperature sensor
Electrical connection, controller adjust the aperture of electric expansion valve according to the first temperature value, second temperature value, inspiratory capacity.
By the real-time monitoring of the operational factor to compressor, the inspiratory capacity of compressor is accurately obtained, based on compressor
Inspiratory capacity show that electric expansion valve meets with the inspiratory capacity of compressor to be consistent matched aperture, then obtain electronic expansion
The aperture of valve, the aperture regulation of electric expansion valve is extremely consistent matched aperture with the inspiratory capacity of compressor；To electronics
The regulation of expansion valve, to ensure the level stability in evaporator, avoid electric expansion valve causes evaporator because aperture is much
Interior liquid level is too high, effectively the problem of avoiding compressor air suction band liquid, and also assures that filling for heat exchanger tube in evaporator
Divide and utilize.
Brief description of the drawings
Fig. 1 is the schematic diagram of the control method of the compressor assembly of the embodiment of the present invention；
Fig. 2 is the schematic diagram of the control method of the compressor assembly of another embodiment of the present invention；
Fig. 3 is the schematic diagram of the compressor assembly of the embodiment of the present invention.
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, but not as the limit to the present invention
It is fixed.
It is shown in Figure 1, according to an embodiment of the invention, there is provided a kind of control method of compressor assembly, compressor
System includes condenser, electric expansion valve, evaporator and the compressor being sequentially communicated, and control method comprises the following steps：
Step S10：The operational factor of compressor is obtained, the inspiratory capacity of compressor is determined according to operational factor；
Step S20：Obtain the aperture of electric expansion valve；
Step S30：According to the aperture and inspiratory capacity of electric expansion valve, the aperture of electric expansion valve is adjusted.
By the real-time monitoring of the operational factor to compressor, the inspiratory capacity of compressor is accurately obtained, based on compressor
Inspiratory capacity show that electric expansion valve meets with the inspiratory capacity of compressor to be consistent matched aperture, then obtain electronic expansion
The aperture of valve, the aperture regulation of electric expansion valve is extremely consistent matched aperture with the inspiratory capacity of compressor；To electronics
The regulation of expansion valve, to ensure the level stability in evaporator, avoid electric expansion valve causes evaporator because aperture is much
Interior liquid level is too high, effectively the problem of avoiding compressor air suction band liquid, and also assures that filling for heat exchanger tube in evaporator
Divide and utilize.And it should be noted that step S10 and step S20 order can exchange, two steps can also be entered simultaneously
OK, do not limited for step S10 and step S20 execution sequence.
It is further preferred that step S20 specifically includes following steps：
Step 1：Obtain the first pressure value of electric expansion valve upstream and the second pressure value in electric expansion valve downstream；
Step 2：The aperture of electric expansion valve is determined according to first pressure value and second pressure value.
The pressure difference before and after electric expansion valve is obtained by first pressure value and second pressure value in step 2, so as to calculate
Go out the liquid supply rate of electric expansion valve, and then obtain the aperture of electric expansion valve.This method for obtaining electronic expansion valve opening, is obtained
The aperture of the electric expansion valve taken is more accurate, but also can carry out comprehensive descision according to the flow and flow rate of refrigerant, can be with
Dynamically obtain the aperture of accurate electric expansion valve.
After step slo and between step S20, the control method of the compressor assembly of the present embodiment also include with
Lower step：
The corresponding relation established according to the inspiratory capacity of compressor between inspiratory capacity and the aperture of electric expansion valve.This correspondence
Relation be according to actual compressor system operating obtain matching database, that is to say, that compressor inspiratory capacity a certain
During numerical value, the aperture of its corresponding electric expansion valve, this corresponding relation makes the liquid supply rate and compressor of electric expansion valve
Inspiratory capacity is consistent, and above-mentioned matching database can be obtained by training, and can also artificially be set, or pass through cloud
Calculate and carry out digital simulation and obtain.
It is further preferred that the operational factor in above-mentioned compressor includes following at least one：Compressor current, pressure
Contracting machine load, suction pressure of compressor, Compressor Discharge Pressure.In the present embodiment, the operational factor of compressor includes above-mentioned
Whole parameters, by more than parameter calculated, and then obtain compressor inspiratory capacity.
Shown in Figure 2, present invention also offers a kind of embodiment of the control method of compressor assembly, this control method
Specifically include following steps：
Step S11：The operational factor of compressor is obtained, the inspiratory capacity of compressor is determined according to operational factor；
Step S21：Obtain the aperture of electric expansion valve；
Step S31：The first temperature value of chilled water in evaporator is obtained, obtains the second temperature of cooling water in condenser
Value；
Step S41：According to the first temperature value, second temperature value, the aperture of electric expansion valve and inspiratory capacity, electronics is adjusted
The aperture of expansion valve.
By the real-time monitoring of the operational factor to compressor, the inspiratory capacity of compressor is accurately obtained, based on compressor
Inspiratory capacity show that electric expansion valve meets with the inspiratory capacity of compressor to be consistent matched aperture, then obtain electronic expansion
The aperture of valve；Then the second temperature value of cooling water in the first temperature value and condenser of chilled water in evaporator is obtained again, is led to
The flow velocity and flow parameter of refrigerant are crossed, further determines that the liquid supply rate of electric expansion valve, opening electric expansion valve in step S41
Degree is adjusted, and is consistent the liquid supply rate of electric expansion valve and the inspiratory capacity of compressor, so to ensure in evaporator
Level stability, avoid electric expansion valve causes liquid level in evaporator too high because aperture is much, effectively avoid compression
The problem of machine absorbing gas belt liquid, and also assures that making full use of for heat exchanger tube in evaporator.And it should be noted that step
S11, step S21 and step 31 order can be exchanged, and three steps can also be carried out simultaneously.
Present invention also offers a kind of embodiment of compressor assembly, and referring to Fig. 3, compressor assembly includes what is be sequentially communicated
Condenser 70, electric expansion valve 20, evaporator 30 and compressor 10, compressor assembly are additionally provided with controller 40, controller 40
Electrically connected with compressor 10, controller 40 is used for the operational factor for obtaining compressor 10, and determines compressor according to operational factor
10 inspiratory capacity, controller 40 electrically connect with electric expansion valve 20, and controller 40 is additionally operable to obtain the aperture of electric expansion valve 20.
Controller 40 is used for aperture and inspiratory capacity according to electric expansion valve 20, and controller 40 controls the aperture of electric expansion valve 20 to carry out
Adjustment.
Progress of the controller 40 to the operational factor of compressor 10 monitors in real time, and controller 40 is accurate by its operational factor
Obtain the inspiratory capacity of compressor 10, the inspiratory capacity based on compressor 10 show that electric expansion valve 20 meets and the suction of compressor 10
Tolerance is consistent matched aperture, and controller obtains the aperture of electric expansion valve 20 again, by the aperture of electric expansion valve 20
Regulation is consistent matched aperture to the inspiratory capacity with compressor 10；Inspiratory capacity pair of the controller in real time based on compressor 10
Electric expansion valve 20 is adjusted, and to ensure the level stability in evaporator 30, avoid electric expansion valve causes because aperture is much
Liquid level in evaporator is too high, effectively the problem of avoiding compressor air suction band liquid, and also assures that in evaporator and exchange heat
Pipe makes full use of, and quick action is made in change that can be faster to compressor assembly operating mode, ensures system condition transition
When it is steady.
As shown in figure 3, compressor assembly is additionally provided with the device of the aperture for detecting electric expansion valve 20, compressor system
System is additionally provided with first pressure sensor 50 and second pressure sensor 60, and first pressure sensor 50 is arranged on electric expansion valve
20 upstream, first pressure sensor 50 are used for the first pressure value for obtaining the upstream of electric expansion valve 20.Second pressure sensor
60 are arranged on the downstream of electric expansion valve 20, and second pressure sensor 60 is used for the second pressure for obtaining the downstream of electric expansion valve 20
Value.Controller 40 electrically connects with first pressure sensor 50 and second pressure sensor 60, and controller 40 is used to receive the first pressure
Force value and second pressure value, and according to first pressure value and the aperture of second pressure value control electric expansion valve 20.
Controller obtains the pressure difference before and after electric expansion valve by first pressure value and second pressure value, so as to calculate electricity
The liquid supply rate of sub- expansion valve, and then obtain the aperture of electric expansion valve.This mode for obtaining electronic expansion valve opening, acquisition
The aperture of electric expansion valve is more accurate, but also can carry out comprehensive descision according to the flow and flow rate of refrigerant, can dynamic
Ground obtains the aperture of accurate electric expansion valve.
Controller 40 is additionally operable to be established between inspiratory capacity and the aperture of electric expansion valve 20 according to the inspiratory capacity of compressor 10
Corresponding relation.This corresponding relation is the matching database obtained according to the operating of actual compressor system, that is to say, that is being pressed
For the inspiratory capacity of contracting machine in a certain numerical value, the aperture of its corresponding electric expansion valve, this corresponding relation makes electric expansion valve
Liquid supply rate and the inspiratory capacity of compressor be consistent, above-mentioned matching database can obtain by training and be stored to control in advance
It in device, can also artificially be set, or digital simulation is carried out to be stored in advance in controller by cloud computing.
Preferably, the operational factor of compressor 10 includes following at least one：The electric current of compressor 10, compressor 10 are negative
Lotus, the pressure of inspiration(Pi) of compressor 10, the pressure at expulsion of compressor 10.
The present embodiment is it is further preferred that compressor assembly also includes the first temperature sensor and second temperature sensor
(being to show the first temperature sensor and second temperature sensor in figure), the first temperature sensor is arranged in evaporator 30,
First temperature sensor is used for the first temperature value for obtaining chilled water in evaporator 30；Second temperature sensor is arranged on condenser
In 70, second temperature sensor is used for the second temperature value for obtaining cooling water in condenser 70.The temperature of controller 40 and first passes
Sensor and second temperature sensor electrical connection, controller 40 adjust electronics according to the first temperature value, second temperature value, inspiratory capacity
The aperture of expansion valve 20.
Certainly, above is the preferred embodiment of the present invention.It should be pointed out that for those skilled in the art
For, on the premise of its general principles are not departed from, some improvements and modifications can also be made, these improvements and modifications
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of control method of compressor assembly, condenser that the compressor assembly includes being sequentially communicated, electric expansion valve,
Evaporator and compressor, it is characterised in that the control method includes：
The operational factor of the compressor is obtained, the inspiratory capacity of the compressor is determined according to the operational factor；
Obtain the aperture of the electric expansion valve；
According to the aperture of the electric expansion valve and the inspiratory capacity, the aperture of the electric expansion valve is adjusted；
Wherein, the control method also includes：The first temperature value of chilled water in the evaporator is obtained, obtains the condenser
The second temperature value of middle cooling water；According to first temperature value, the second temperature value, the aperture of the electric expansion valve with
And the inspiratory capacity, adjust the aperture of the electric expansion valve.
2. control method according to claim 1, it is characterised in that it is described obtain electric expansion valve aperture the step of wrap
Include：
Obtain the first pressure value of the electric expansion valve upstream and the second pressure value in the electric expansion valve downstream；
The aperture of the electric expansion valve is determined according to the first pressure value and the second pressure value.
3. control method according to claim 1, it is characterised in that further comprising the steps of：
The corresponding relation established according to the inspiratory capacity of the compressor between the inspiratory capacity and the aperture of electric expansion valve.
4. control method according to claim 1, it is characterised in that the operational factor of the compressor include it is following extremely
Few one kind：Compressor current, compressor load, suction pressure of compressor, Compressor Discharge Pressure.
5. a kind of compressor assembly, the compressor assembly includes condenser, electric expansion valve, evaporator and the pressure being sequentially communicated
Contracting machine, it is characterised in that also include：
Controller, with the compression mechatronics, the controller is used for the operational factor for obtaining the compressor, and according to institute
State the inspiratory capacity that operational factor determines the compressor；
The controller electrically connects with the electric expansion valve, and the controller is additionally operable to obtain opening for the electric expansion valve
Degree；
The controller is used for aperture and the inspiratory capacity according to the electric expansion valve, and the controller controls the electronics
The aperture of expansion valve is adjusted；
Wherein, the compressor assembly also includes：
First temperature sensor, it is arranged in the evaporator, first temperature sensor is used to obtain in the evaporator
First temperature value of chilled water；
Second temperature sensor, it is arranged in the condenser, the second temperature sensor is used to obtain in the condenser
The second temperature value of cooling water；
The controller electrically connects with first temperature sensor and the second temperature sensor, and the controller is according to institute
The first temperature value, the second temperature value, the inspiratory capacity are stated, adjusts the aperture of the electric expansion valve.
6. compressor assembly according to claim 5, it is characterised in that the compressor assembly also includes：
First pressure sensor, the first pressure sensor are arranged on the upstream of the electric expansion valve, the first pressure
Sensor is used for the first pressure value for obtaining the electric expansion valve upstream；
Second pressure sensor, the second pressure sensor are arranged on the downstream of the electric expansion valve, the second pressure
Sensor is used for the second pressure value for obtaining the electric expansion valve downstream；
The controller electrically connects with the first pressure sensor and the second pressure sensor, and the controller is used to connect
The first pressure value and the second pressure value are received, and institute is controlled according to the first pressure value and the second pressure value
State the aperture of electric expansion valve.
7. compressor assembly according to claim 5, it is characterised in that the controller is additionally operable to according to the compressor
The corresponding relation established between the inspiratory capacity and the aperture of electric expansion valve of inspiratory capacity.
8. compressor assembly according to claim 5, it is characterised in that the operational factor of the compressor includes following
It is at least one：Compressor current, compressor load, suction pressure of compressor, Compressor Discharge Pressure.
9. compressor assembly according to claim 5, it is characterised in that the compressor assembly also includes：
First temperature sensor, it is arranged in the evaporator, first temperature sensor is used to obtain in the evaporator
First temperature value of chilled water；
Second temperature sensor, it is arranged in the condenser, the second temperature sensor is used to obtain in the condenser
The second temperature value of cooling water；
The controller electrically connects with first temperature sensor and the second temperature sensor, and the controller is according to institute
The first temperature value, the second temperature value, the inspiratory capacity are stated, adjusts the aperture of the electric expansion valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510869565.8A CN105423667B (en) | 2015-11-30 | 2015-11-30 | Control method of compressor system and compressor system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510869565.8A CN105423667B (en) | 2015-11-30 | 2015-11-30 | Control method of compressor system and compressor system |
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| Publication Number | Publication Date |
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| CN105423667A CN105423667A (en) | 2016-03-23 |
| CN105423667B true CN105423667B (en) | 2018-03-30 |
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| CN201510869565.8A Active CN105423667B (en) | 2015-11-30 | 2015-11-30 | Control method of compressor system and compressor system |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107388644A (en) * | 2017-06-12 | 2017-11-24 | 珠海格力电器股份有限公司 | Variable-frequency water cooling unit and control method thereof |
| CN112665246B (en) * | 2020-12-17 | 2022-05-17 | 珠海格力电器股份有限公司 | Method and device for regulating and controlling electronic expansion valve and heat pump equipment |
| CN116858528B (en) * | 2023-09-04 | 2023-12-05 | 合肥通用机械研究院有限公司 | Compressor-expansion valve performance coupling matching test system and test method |
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| US9057549B2 (en) * | 2007-10-08 | 2015-06-16 | Emerson Climate Technologies, Inc. | System and method for monitoring compressor floodback |
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| US9057549B2 (en) * | 2007-10-08 | 2015-06-16 | Emerson Climate Technologies, Inc. | System and method for monitoring compressor floodback |
| CN101832689A (en) * | 2009-03-10 | 2010-09-15 | 财团法人工业技术研究院 | Method and system for controlling compressor |
| CN102135295A (en) * | 2011-04-03 | 2011-07-27 | Tcl空调器(中山)有限公司 | Air conditioner and control method thereof |
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