CN105258416B - Control method, control device and the control system of electric expansion valve initial opening - Google Patents
Control method, control device and the control system of electric expansion valve initial opening Download PDFInfo
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- CN105258416B CN105258416B CN201510649395.2A CN201510649395A CN105258416B CN 105258416 B CN105258416 B CN 105258416B CN 201510649395 A CN201510649395 A CN 201510649395A CN 105258416 B CN105258416 B CN 105258416B
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Abstract
The present invention provides a kind of control method, control device and the control systems of electric expansion valve initial opening.Include according to the method for the present invention：Step S1：Detect outdoor environment temperature T；Step S2：According to default P T relationships, the corresponding electric expansion valve initial opening P values of outdoor environment temperature T are calculated；Step S3：By electronic expansion valve events to corresponding P values.The present invention is by detecting outdoor environment temperature T, and according to preset P T relationships, the initial opening P values of electric expansion valve are calculated, thereby may be ensured that compressor quickly establishes exhaust, oil overheating degree in low temperature, ensure discharge degree during high temperature simultaneously, it is ensured that compressor and the reliability service of complete machine.
Description
Technical field
The present invention relates to airconditioning control field, in particular to a kind of control method of electric expansion valve initial opening,
Control device and control system.
Background technology
In the prior art, air conditioner is substantially single-point control for the control method of electric expansion valve initial opening, i.e.,
Refrigeration or heating booting assign one initial value of electric expansion valve, this value is constant in one section of preset time being just switched on, and surpasses
Cross the preset time ability freedom of entry shaping modes.
However, there is the defects of very big in this control method of the prior art.Under cooling condition, the initial of single-point opens
Degree wants the exhaust and the foundation of oil overheating degree with respect to low temperature and the discharge degree of high temperature simultaneously, is difficult to accomplish this in reality
A bit, often occurs the phenomenon that high-temperature refrigeration hypertonia protection when initial valve step is improper is shut down in experiment；In heating condition
Under, initial valve, which walks fixed too conference, causes compressor oil temperature degree of superheat settling time under worst cold case long, reliable to compressor
Property unfavorable, fixed too small then unit maximum heating hypertonia.These problems are especially prominent in frequency machine is determined.
Invention content
The present invention is intended to provide a kind of control method of electric expansion valve initial opening that can improve reliability, control dress
It puts and control system.
The present invention provides a kind of control method of electric expansion valve initial opening, this method includes：Step S1：Sensing chamber
External environment temperature T；Step S2：According to default P-T relationships, the corresponding electric expansion valve initial opening P of outdoor environment temperature T are calculated
Value；Step S3：By electronic expansion valve events to corresponding P values.
Further, step S2 includes：Judge the open mode of air-conditioning；When open mode is heating mode, according to pre-
Hot P-T relationships are equipped with, calculate the corresponding electric expansion valve initial opening P values of outdoor environment temperature T；When open mode is refrigeration mould
During formula, according to default refrigeration P-T relationships, the corresponding electric expansion valve initial opening P values of outdoor environment temperature T are calculated.
The present invention also provides a kind of control device of electric expansion valve initial opening, including：Detection module；For detecting
Outdoor environment temperature T；Computing module；For according to default P-T relationships, calculating the corresponding electric expansion valves of outdoor environment temperature T
Initial opening P values；Control module, for by electronic expansion valve events to corresponding P values.
Further, computing module includes：First submodule, for when open mode is heating mode, according to default
P-T relationships are heated, calculate the corresponding electric expansion valve initial opening P values of outdoor environment temperature T；The second submodule is opened for working as
When opening pattern as refrigeration mode, according to default refrigeration P-T relationships, it is initial to calculate the corresponding electric expansion valves of outdoor environment temperature T
Aperture P values.
The present invention also provides a kind of control system of electric expansion valve initial opening, including：Temperature-detecting device, detection
Outdoor environment temperature T；Controller, the outdoor environment temperature T of collecting temperature detection device detection, and according to default P-T relationships, meter
Calculate the corresponding electric expansion valve initial opening P values of outdoor environment temperature T, then by electronic expansion valve events to corresponding P values.
Control method, control device and the control system of electric expansion valve initial opening according to the present invention, pass through detection
Outdoor environment temperature T, and according to preset P-T relationships, calculate the initial opening P values of electric expansion valve, thereby may be ensured that
Compressor quickly establishes exhaust, oil overheating degree during low temperature, while ensures discharge degree during high temperature, it is ensured that compressor and complete machine
Reliability service.
Description of the drawings
The attached drawing for forming the part of the application is used to provide further understanding of the present invention, schematic reality of the invention
Example and its explanation are applied for explaining the present invention, is not constituted improper limitations of the present invention.In the accompanying drawings：
Fig. 1 is the control method flow diagram of electric expansion valve initial opening according to the present invention；
Fig. 2 is refrigeration P-T relation schematic diagrams according to the present invention；
Fig. 3 is heating P-T relation schematic diagrams according to the present invention.
Specific embodiment
The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
As shown in Figure 1, the control method of electric expansion valve initial opening according to the present invention, this method include：Step S1：
Detect environment temperature T；Step S2：According to default P-T relationships, the corresponding P values of computing environment temperature T；Step S3：By electronic expansion
Corresponding P values are accomplished in valve actuation.I.e. the present invention is by detecting outdoor environment temperature T, and according to preset P-T relationships, calculates electronics
Initial opening P values of expansion valve namely in the present invention, the initial of electric expansion valve is determined by the outdoor environment temperature detected
Aperture by acquiring the outdoor environment temperature T of temperature sensing package before booting, determines electric expansion valve initial opening P by value, leads to
Cross the action of coil so that the aperture of electric expansion valve reaches target aperture, then boots up processing, thereby may be ensured that low
Compressor quickly establishes exhaust, oil overheating degree when warm, while ensures discharge degree during high temperature, it is ensured that compressor and complete machine
Reliability service.
Specifically, with reference to shown in 2 and Fig. 3, due to the P-T relationships of electric expansion valve initial opening and outdoor environment temperature,
It is different in the case where heating and freezing both of which.Namely in step s 2, the open mode of air-conditioning is first determined whether；When open mode is
During heating mode, according to default heating P-T relationships, the corresponding P values of computing environment temperature T；When open mode is refrigeration mode,
According to default refrigeration P-T relationships, the corresponding P values of computing environment temperature T.Freezing under heating mode, controlling respectively, Neng Gougeng
Further improve precise control and reliability.
The present invention also provides a kind of control device of the corresponding electric expansion valve initial opening of control method, including：Inspection
Survey module；For detecting environment temperature T；Computing module；For according to default P-T relationships, the corresponding P values of computing environment temperature T；
Control module, for by electronic expansion valve events to corresponding P values.Determine that electronics is swollen by the outdoor environment temperature detected
The initial opening of swollen valve thereby may be ensured that compressor quickly establishes exhaust, oil overheating degree, while ensures high temperature in low temperature
When discharge degree, it is ensured that compressor and the reliability service of complete machine.
More specifically, with reference to shown in 2 and Fig. 3, since the P-T of electric expansion valve initial opening and outdoor environment temperature is closed
System, different in the case where heating and freezing both of which, in order to improve precise control, computing module includes：First submodule, is used for
When open mode is heating mode, according to default heating P-T relationships, the corresponding P values of computing environment temperature T；The second submodule,
For when open mode be refrigeration mode when, according to it is default refrigeration P-T relationships, the corresponding P values of computing environment temperature T.
A kind of control system of electric expansion valve initial opening of the present invention, including：Temperature-detecting device, for detecting environment
Temperature T, generally using temperature-detecting devices such as temperature sensing packages；Controller, the environment temperature T of collecting temperature detection device detection, and
According to default P-T relationships, the corresponding P values of computing environment temperature T, then by electronic expansion valve events to corresponding P values.Before being switched on
The outdoor environment temperature T detected by collecting temperature detection device determines electric expansion valve initial opening P by value, passes through
The action of coil so that the aperture of electric expansion valve reaches target aperture, then boots up processing, ensures the compressor in low temperature
It is quick to establish exhaust, oil overheating degree, while ensure discharge degree during high temperature, it is ensured that compressor and the reliability service of complete machine.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
Control method, control device and the control system of electric expansion valve initial opening according to the present invention, pass through detection
Outdoor environment temperature T, and according to preset P-T relationships, calculate the initial opening P values of electric expansion valve, thereby may be ensured that
Compressor quickly establishes exhaust, oil overheating degree during low temperature, while ensures discharge degree during high temperature, it is ensured that compressor and complete machine
Reliability service.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of control method of electric expansion valve initial opening, which is characterized in that the method includes：
Step S1：Outdoor environment temperature T is detected before booting；
Step S2：According to default P-T relationships, the corresponding electric expansion valve initial opening P values of the outdoor environment temperature T are calculated；
Wherein, the outdoor environment temperature T is divided into the first temperature range Ta-Tb, second temperature according to sequence from small to large
Section Tb-Tc, third temperature range Tc-Td, more than the 4th temperature range Td；
The outdoor environment temperature Ta-Tb in first temperature range corresponds to preset first P values；
The outdoor environment temperature T and the electric expansion valve initial opening P values in the second temperature section is a pair of for one
It should be related to；The one-to-one relationship has first slope；The corresponding electric expansion valve initial opening P values of Tb in second temperature section
For the first P values；
The outdoor environment temperature T and the electric expansion valve initial opening P values in the third temperature range is a pair of for one
It should be related to, which has the second slope；Second slope is more than the first slope；The second temperature area
Between the corresponding electric expansion valve initial opening P values of Tc electric expansion valve corresponding with the Tc of the third temperature range initially open
It is equal to spend P values；
The outdoor environment temperature T in 4th temperature range corresponds to preset 2nd P values；The 2nd P values are more than institute
State the first P values；The corresponding electric expansion valve initial opening P values of Td of the third temperature range are the 2nd P values；
Wherein, the step S2 includes：Judge the open mode of air-conditioning；When open mode is heating mode, according to being equipped in advance
Hot P-T relationships calculate the corresponding electric expansion valve initial opening P values of the outdoor environment temperature T；When open mode is refrigeration mould
During formula, according to default refrigeration P-T relationships, the corresponding electric expansion valve initial opening P values of the outdoor environment temperature T are calculated；
Step S3：By electronic expansion valve events to corresponding P values.
2. a kind of control device of electric expansion valve initial opening, which is characterized in that including：
Detection module；For detecting outdoor environment temperature T before booting；
Computing module；For according to default P-T relationships, calculating the corresponding electric expansion valves of the outdoor environment temperature T and initially opening
Spend P values；
Wherein, the outdoor environment temperature T is divided into the first temperature range Ta-Tb, second temperature according to sequence from small to large
Section Tb-Tc, third temperature range Tc-Td, more than the 4th temperature range Td；
The outdoor environment temperature Ta-Tb in first temperature range corresponds to preset first P values；
The outdoor environment temperature T and the electric expansion valve initial opening P values in the second temperature section is a pair of for one
It should be related to；The one-to-one relationship has first slope；The corresponding electric expansion valve initial opening P values of Tb in second temperature section
For the first P values；
The outdoor environment temperature T and the electric expansion valve initial opening P values in the third temperature range is a pair of for one
It should be related to, which has the second slope；Second slope is more than the first slope；The second temperature area
Between the corresponding electric expansion valve initial opening P values of Tc electric expansion valve corresponding with the Tc of the third temperature range initially open
It is equal to spend P values；
The outdoor environment temperature T in 4th temperature range corresponds to preset 2nd P values；The 2nd P values are more than institute
State the first P values；The corresponding electric expansion valve initial opening P values of Td of the third temperature range are the 2nd P values；
Wherein, the computing module includes：First submodule, for when open mode be heating mode when, according to default heating
P-T relationships calculate the corresponding electric expansion valve initial opening P values of the outdoor environment temperature T；The second submodule is opened for working as
When opening pattern as refrigeration mode, according to default refrigeration P-T relationships, the corresponding electric expansion valves of the outdoor environment temperature T are calculated
Initial opening P values；
Control module, for by electronic expansion valve events to corresponding P values.
3. a kind of control system of electric expansion valve initial opening, which is characterized in that including：
Temperature-detecting device detects outdoor environment temperature T before booting；
Controller, the outdoor environment temperature T of collecting temperature detection device detection, and according to default P-T relationships, calculate the outdoor
The corresponding electric expansion valve initial opening P values of environment temperature T, then by electronic expansion valve events to corresponding P values；
Wherein, the outdoor environment temperature T is divided into the first temperature range Ta-Tb, second temperature according to sequence from small to large
Section Tb-Tc, third temperature range Tc-Td, more than the 4th temperature range Td；
The outdoor environment temperature Ta-Tb in first temperature range corresponds to preset first P values；
The outdoor environment temperature T and the electric expansion valve initial opening P values in the second temperature section is a pair of for one
It should be related to；The one-to-one relationship has first slope；The corresponding electric expansion valve initial opening P values of Tb in second temperature section
For the first P values；
The outdoor environment temperature T and the electric expansion valve initial opening P values in the third temperature range is a pair of for one
It should be related to, which has the second slope；Second slope is more than the first slope；The second temperature area
Between the corresponding electric expansion valve initial opening P values of Tc electric expansion valve corresponding with the Tc of the third temperature range initially open
It is equal to spend P values；
The outdoor environment temperature T in 4th temperature range corresponds to preset 2nd P values；The 2nd P values are more than institute
State the first P values；The corresponding electric expansion valve initial opening P values of Td of the third temperature range are the 2nd P values；
Including：Judge the open mode of air-conditioning；When open mode is heating mode, according to default heating P-T relationships, meter
Calculate the corresponding electric expansion valve initial opening P values of the outdoor environment temperature T；When open mode is refrigeration mode, according to pre-
Cold P-T relationships are equipped with, calculate the corresponding electric expansion valve initial opening P values of the outdoor environment temperature T.
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| CN105783193B (en) * | 2016-04-13 | 2019-03-08 | Tcl空调器(中山)有限公司 | The initial opening control method and device of electric expansion valve |
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| CN113819638A (en) * | 2021-09-22 | 2021-12-21 | 青岛海尔空调器有限总公司 | Air conditioner control method and control device under high-environment-temperature condition |
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