CN106322640B - The control method for electronic expansion valve of air-conditioning indoor load mutation - Google Patents
The control method for electronic expansion valve of air-conditioning indoor load mutation Download PDFInfo
- Publication number
- CN106322640B CN106322640B CN201510386482.3A CN201510386482A CN106322640B CN 106322640 B CN106322640 B CN 106322640B CN 201510386482 A CN201510386482 A CN 201510386482A CN 106322640 B CN106322640 B CN 106322640B
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- Prior art keywords
- expansion valve
- air
- conditioning
- degree
- superheat
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Classifications
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- 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
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- 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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2117—Temperatures of an evaporator
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- 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 present invention provides a kind of control method for electronic expansion valve of air-conditioning indoor load mutation, comprising: setpoint frequency presets variable quantity and electric expansion valve presets aperture, and sets the relationship of the expansion valve opening of the air-conditioning and the compressor frequency of the air-conditioning；The compressor frequency of air-conditioning described in the real time measure；If the variable quantity of the compressor frequency of the air-conditioning is greater than the predetermined frequency variable quantity, the expansion valve opening is adjusted to the electric expansion valve and presets aperture；The real-time degree of superheat of the air-conditioning is measured, and according to the real-time degree of superheat, determines period actuation time of the expansion valve.The present invention presets aperture by setting electric expansion valve; when the case where sudden load change; the aperture of compressor frequency and the electric expansion valve changes simultaneously; the risk even shut down due to the insufficient caused overheat of compressor revolution mutation bring internal circulating load can effectively be evaded; not only it ensure that outlet air performance, but also protected compressor.
Description
Technical field
The invention belongs to the electric expansion valve controls that air-conditioning equipment adjusts field more particularly to a kind of mutation of air-conditioning indoor load
Method processed.
Background technique
During compressor operation, period actuation time (judgement of the practical degree of superheat and target superheat) point of expansion valve
Several class were differed by several seconds to tens seconds, and the moment that load mutates indoors, and compressor is born according to new at once
The action cycle of lotus operating, expansion valve acts also according to the time cycle before load variations, after waiting the time cycle to cross,
According still further to the relationship of the practical degree of superheat and target superheat degree, corresponding actions are provided.
When load mutates indoors, especially low frequency steady running becomes the switching period operated in a high frequency, pressure
Period actuation time of contracting machine and period actuation time of expansion valve, there are larger gaps, will lead to refrigerant circulation and did not caught up with,
So that there is the judgement of mistake in plavini control.
Summary of the invention
Therefore, the present invention provides a kind of can change in time according to compressor frequency and adjusts electric expansion valve moment aperture
The control method for electronic expansion valve of air-conditioning indoor load mutation.
A kind of control method for electronic expansion valve of air-conditioning indoor load mutation, comprising:
Determine the relationship in period actuation time of the electric expansion valve of the air-conditioning degree of superheat and the air-conditioning；
Setpoint frequency presets variable quantity and electric expansion valve presets aperture, and sets expansion valve opening and the institute of the air-conditioning
State the relationship of the compressor frequency of air-conditioning；
The compressor frequency of air-conditioning described in the real time measure；
If the variable quantity of the compressor frequency of the air-conditioning is greater than the predetermined frequency variable quantity, the expansion valve is opened
Degree is adjusted to the electric expansion valve and presets aperture；
The real-time degree of superheat of the air-conditioning is measured, and according to the real-time degree of superheat, when determining the movement of the expansion valve
Between the period.
It is preset in aperture the expansion valve opening to be adjusted to the electric expansion valve, further includes:
The expansion valve is adjusted to initial baseline aperture.
The initial baseline aperture is the electric expansion valve fully open state.
When measuring the real-time degree of superheat of the air-conditioning, the medium temperature T1, described including detecting the evaporator
The outlet temperature T2 of evaporator；When the air-conditioning system is under heating mode, detect the condenser medium temperature T4,
The outlet temperature T5 of the condenser；
Calculate degree of superheat Δ T, when the air-conditioning system in cooling mode, the degree of superheat Δ T=T2-a*T1+
B, wherein a, b are correction parameter；When the air-conditioning system is under heating mode, the degree of superheat Δ T=T5-c*T4+
D, wherein c, d are correction parameter；
The outer temperature T3 of actual environment locating for the detection air-conditioning system simultaneously sets target superheat degree Δ Tr according to it；
Compare the degree of superheat Δ T and the target superheat degree Δ Tr, when adjusting the movement of the electric expansion valve
Between the period.
The outlet temperature T2 of the evaporator is substituted using the suction temperature Ts of the compressor.
Period actuation time of the electric expansion valve is according to the degree of superheat Δ T and target superheat degree Δ Tr points
For at least two period.
Period actuation time that the degree of superheat controls the electric expansion valve is PID control.
The control method for electronic expansion valve of air-conditioning indoor load mutation provided by the invention, it is pre- by setting electric expansion valve
If aperture, when the case where sudden load change, the aperture of compressor frequency and the electric expansion valve changes simultaneously, Neng Gouyou
Effect evades the risk even shut down due to the insufficient caused overheat of compressor revolution mutation bring internal circulating load, both ensure that out
Wind performance, and protect compressor.
Detailed description of the invention
Fig. 1 is the flow chart of the control method for electronic expansion valve of air-conditioning indoor load mutation provided by the invention；
Fig. 2 is the control schematic diagram of the control method for electronic expansion valve of air-conditioning indoor load mutation provided by the invention.
Specific embodiment
Below by specific embodiment and in conjunction with attached drawing, the present invention will be described in detail.
The control method for electronic expansion valve of air-conditioning indoor load mutation as shown in Figure 1, comprising:
S11 determines the relationship of the period actuation time t of the electric expansion valve of the air-conditioning degree of superheat and the air-conditioning；
S12 setpoint frequency presets variable quantity D and electric expansion valve presets aperture k, and the expansion valve for setting the air-conditioning is opened
The relationship of the compressor frequency of degree and the air-conditioning；
The compressor frequency D1 of air-conditioning described in S13 the real time measure；
If the variable quantity D1 of the compressor frequency of the S14 air-conditioning is greater than the predetermined frequency variable quantity D, will be described swollen
Swollen valve opening is adjusted to the electric expansion valve and presets aperture k；
S15 measures the real-time degree of superheat of the air-conditioning, and according to the real-time degree of superheat, determines the movement of the expansion valve
Time cycle t.
It is preset in aperture the expansion valve opening to be adjusted to the electric expansion valve, further includes: by the expansion valve
It is adjusted to initial baseline aperture.
The initial baseline aperture is the electric expansion valve fully open state.
When measuring the real-time degree of superheat of the air-conditioning, the medium temperature T1, described including detecting the evaporator
The outlet temperature T2 of evaporator；When the air-conditioning system is under heating mode, detect the condenser medium temperature T4,
The outlet temperature T5 of the condenser；
Calculate degree of superheat Δ T, when the air-conditioning system in cooling mode, the degree of superheat Δ T=T2-a*T1+
B, wherein a, b are correction parameter；When the air-conditioning system is under heating mode, the degree of superheat Δ T=T5-c*T4+
D, wherein c, d are correction parameter；
The outer temperature T3 of actual environment locating for the detection air-conditioning system simultaneously sets target superheat degree Δ Tr according to it；
Compare the degree of superheat Δ T and the target superheat degree Δ Tr, when adjusting the movement of the electric expansion valve
Between the period.
The outlet temperature T2 of the evaporator is substituted using the suction temperature Ts of the compressor.
Period actuation time of the electric expansion valve is according to the degree of superheat Δ T and target superheat degree Δ Tr points
For at least two period.
Period actuation time that the degree of superheat controls the electric expansion valve is PID control.
When air-conditioning operates normally, the electric expansion valve is in normal regulating state, that is, when being in a certain movement
Between in the period, when load changes suddenly, the compressor frequency of the application and change, it is at the same time, described
Electric expansion valve is directly returned to the electric expansion valve and presets at aperture or be restored at initial baseline aperture, then passes through
Above-mentioned temperature measuring and the air-conditioning degree of superheat is calculated, and by the air-conditioning degree of superheat again to the electric expansion valve
Period actuation time be adjusted, worked normally.
The control method for electronic expansion valve of air-conditioning indoor load mutation provided by the invention, it is pre- by setting electric expansion valve
If aperture, when the case where sudden load change, the aperture of compressor frequency and the electric expansion valve changes simultaneously, Neng Gouyou
Effect evades the risk even shut down due to the insufficient caused overheat of compressor revolution mutation bring internal circulating load.Both it ensure that out
Wind performance, and protect compressor.
Only the preferred embodiments of the present invention have been described above, it is noted that for the ordinary skill of the art
For personnel, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of control method for electronic expansion valve of air-conditioning indoor load mutation, it is characterised in that: comprise determining that the air-conditioning degree of superheat
With the relationship in period actuation time of the electric expansion valve of the air-conditioning；
Setpoint frequency presets variable quantity and electric expansion valve presets aperture, and sets electronic expansion valve opening and the institute of the air-conditioning
State the relationship of the compressor frequency of air-conditioning；
The compressor frequency of air-conditioning described in the real time measure；
If the variable quantity of the compressor frequency of the air-conditioning is greater than the predetermined frequency variable quantity, the electric expansion valve is opened
Degree is adjusted to the electric expansion valve and presets aperture；
The real-time degree of superheat of the air-conditioning is measured, and according to the real-time degree of superheat, when determining the movement of the electric expansion valve
Between the period.
2. control method for electronic expansion valve according to claim 1, it is characterised in that: by the electronic expansion valve opening
The electric expansion valve is adjusted to preset in aperture, further includes:
The electric expansion valve is adjusted to initial baseline aperture.
3. control method for electronic expansion valve according to claim 2, it is characterised in that: the initial baseline aperture is described
Electric expansion valve fully open state.
4. control method for electronic expansion valve according to claim 1, it is characterised in that: in the real-time mistake for measuring the air-conditioning
When temperature, including detecting the medium temperature T1 of evaporator, the outlet temperature T2 of the evaporator；When the air-conditioning system exists
Under heating mode, the medium temperature T4 of condenser, the outlet temperature T5 of the condenser are detected；
Calculate degree of superheat Δ T, when the air-conditioning system in cooling mode, the degree of superheat Δ T=T2-a*T1+b,
In, a, b are correction parameter；When the air-conditioning system is under heating mode, the degree of superheat Δ T=T5-c*T4+d,
In, c, d are correction parameter；
The outer temperature T3 of actual environment locating for the detection air-conditioning system, and target superheat degree Δ Tr is set according to it；
Compare the degree of superheat Δ T and the target superheat degree Δ Tr, adjusts week actuation time of the electric expansion valve
Phase.
5. control method for electronic expansion valve according to claim 4, it is characterised in that: the outlet temperature of the evaporator
T2 is substituted using the suction temperature Ts of the compressor.
6. control method for electronic expansion valve according to claim 4, it is characterised in that: when the movement of the electric expansion valve
Between the period according to the degree of superheat Δ T and target superheat degree Δ Tr point be at least two period.
7. control method for electronic expansion valve according to claim 1, it is characterised in that: the degree of superheat controls the electronics
Period actuation time of expansion valve is PID control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510386482.3A CN106322640B (en) | 2015-06-30 | 2015-06-30 | The control method for electronic expansion valve of air-conditioning indoor load mutation |
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|---|---|---|---|
| CN201510386482.3A CN106322640B (en) | 2015-06-30 | 2015-06-30 | The control method for electronic expansion valve of air-conditioning indoor load mutation |
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| CN106322640A CN106322640A (en) | 2017-01-11 |
| CN106322640B true CN106322640B (en) | 2019-05-31 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11841176B2 (en) | 2021-12-01 | 2023-12-12 | Haier Us Appliance Solutions, Inc. | Method of operating an electronic expansion valve in an air conditioner unit |
| US11841151B2 (en) | 2021-12-01 | 2023-12-12 | Haier Us Appliance Solutions, Inc. | Method of operating an electronic expansion valve in an air conditioner unit |
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| CN107449078A (en) * | 2017-07-26 | 2017-12-08 | 美的集团武汉制冷设备有限公司 | Air-conditioning system, the control device of air-conditioning system and method |
| CN111043737A (en) * | 2019-12-23 | 2020-04-21 | 青岛海尔空调器有限总公司 | Method and device for controlling expansion valve and air conditioner |
| CN112254311B (en) * | 2020-10-14 | 2021-10-08 | 珠海格力电器股份有限公司 | Control method of electronic expansion valve and air conditioner |
| CN112503811B (en) * | 2020-12-10 | 2021-12-10 | 珠海格力电器股份有限公司 | Control method of electronic expansion valve and heat pump system |
| CN112856865A (en) * | 2021-01-28 | 2021-05-28 | 山东奇威特太阳能科技有限公司 | Refrigerant flow control method and refrigerating unit |
| CN112944756B (en) * | 2021-02-10 | 2022-03-29 | 珠海格力电器股份有限公司 | Compressor air suction dryness optimizing control method and device and air conditioner |
| CN113280540A (en) * | 2021-06-10 | 2021-08-20 | 珠海格力电器股份有限公司 | Opening control method and device of electronic expansion valve and refrigeration display cabinet |
| CN114543328B (en) * | 2022-01-17 | 2023-11-21 | 青岛海尔空调器有限总公司 | Method and device for controlling air conditioner, air conditioner and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US11841151B2 (en) | 2021-12-01 | 2023-12-12 | Haier Us Appliance Solutions, Inc. | Method of operating an electronic expansion valve in an air conditioner unit |
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| CN106322640A (en) | 2017-01-11 |
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