CN107631431A - Air conditioning control method and device - Google Patents
Air conditioning control method and device Download PDFInfo
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- CN107631431A CN107631431A CN201710876715.7A CN201710876715A CN107631431A CN 107631431 A CN107631431 A CN 107631431A CN 201710876715 A CN201710876715 A CN 201710876715A CN 107631431 A CN107631431 A CN 107631431A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air-Conditioning For Vehicles (AREA)
Abstract
The invention provides a kind of air-conditioning adjusting method and device, wherein, this method includes：Obtain the inlet outlet pressure differential of air-conditioning expansion valve；In the case where the inlet outlet pressure differential exceeds preset range, the operational mode of the condensation fan of the air-conditioning is adjusted, until the inlet outlet pressure differential is without departing from the preset range.It is more accurate by the regulation of such scheme electric expansion valve, to ensure that the aperture of electric expansion valve is Significant Change.
Description
Technical field
The present invention relates to air conditioner technical field, in particular to a kind of air conditioning control method and device.
Background technology
At present, the regulation of electronic expansion valve opening is usually according to the big of evaporator exit superheat refrigerant vapor degree
It is small, the open degree of valve is automatically adjusted, to reach the purpose of adjusting refrigerant flow rate, so that refrigerant flow and evaporator
Load matches.
However, when actually realizing, mainly passed in and out by the number of electric expansion valve refrigerant flow by expansion valve
Mouth pressure difference and expansion valve actual internal area determine, and the regulative mode of the degree of superheat is also simply to the tune of expansion valve actual internal area
Section.Especially at low ambient temperatures, often there is electronic expansion valve opening and be tuned to maximum, but system overheat degree can not still be adjusted
Section, and system feed flow deficiency causes the situation that refrigerating capacity declines.
In view of the above-mentioned problems, not yet propose effective settling mode at present.
The content of the invention
It is maximum to avoid the occurrence of electronic expansion valve opening the embodiments of the invention provide a kind of air-conditioning adjusting method,
But the generation for the problem of system overheat can not still be adjusted, and refrigerating capacity declines, this method include：
Obtain the inlet outlet pressure differential of air-conditioning expansion valve；
In the case where the inlet outlet pressure differential exceeds preset range, the operational mode of the condensation fan of the air-conditioning is entered
Row adjustment, until the inlet outlet pressure differential is without departing from the preset range.
In one embodiment, the inlet outlet pressure differential of air-conditioning expansion valve is obtained, including：
Obtain the pressure of refrigeration unit exhaust outlet of compressor and the pressure of the refrigeration unit compressor air suction mouth；
By the difference between the pressure of the exhaust outlet and the pressure of the air entry, as the pressure difference.
In one embodiment, obtaining the inlet outlet pressure differential of air-conditioning expansion valve includes：
When refrigeration unit is run, determine the difference between the degree of superheat of unit and degree of superheat setting value whether beyond default
Threshold value, in the case of beyond predetermined threshold value, obtain the inlet outlet pressure differential of air-conditioning expansion valve.
In one embodiment, it is adjusted in the operational mode of the condensation fan to the air-conditioning, enters described in
After pressure difference is exported without departing from the preset range, methods described also includes：
According to degree of superheat size, the aperture of electric expansion valve is adjusted.
In one embodiment, in the case where condensation fan is determines frequency without high and low shift, to the condensating wind of the air-conditioning
The operational mode of machine is adjusted, including：
In the case where compression ratio is more than preset value, control condensation fan is in running status；
In the case where the inlet outlet pressure differential is more than or equal to maximum differential pressure, control condensation fan is in running status；
In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；
Be less than maximum differential pressure in the inlet outlet pressure differential, more than or equal to minimum differntial pressure in the case of, control condensation fan
State is constant.
In one embodiment, in the case where condensation fan is determines to have high and low shift frequently, to the condensating wind of the air-conditioning
The operational mode of machine is adjusted, including：
In the case where the inlet outlet pressure differential is more than or equal to the first preset pressure value, condensation fan high-speed cruising is controlled；
It is more than or equal to the first preset pressure value and less than or equal to the situation of the second preset pressure value in the inlet outlet pressure differential
Under, the low speed operation of control condensation fan；
In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；
It is more than the second preset pressure value in the inlet outlet pressure differential and is less than the 3rd preset pressure value, and the inlet and outlet pressure
Difference is more than or equal to minimum differntial pressure and less than in the case of the 3rd preset pressure value, controls the state of condensation fan constant；
Wherein, the first preset pressure value, the second preset pressure value, the 3rd preset pressure value are according to maximum differential pressure value and minimum
Pressure difference determines.
The embodiment of the present invention additionally provides a kind of air-conditioning adjusting means, to have avoided the occurrence of electronic expansion valve opening most
Greatly, the generation for the problem of but system overheat can not still be adjusted, and refrigerating capacity declines, the device include：
Acquisition module, for obtaining the inlet outlet pressure differential of air-conditioning expansion valve；
Adjusting module, in the case of exceeding preset range in the inlet outlet pressure differential, to the condensating wind of the air-conditioning
The operational mode of machine is adjusted, until the inlet outlet pressure differential is without departing from the preset range.
In one embodiment, the acquisition module includes：
Acquiring unit, for the pressure for obtaining refrigeration unit exhaust outlet of compressor and the refrigeration unit compressor air suction mouth
Pressure；
Determining unit, for by the difference between the pressure of the exhaust outlet and the pressure of the air entry, as described
Pressure difference.
In one embodiment, the acquisition module is specifically used for when refrigeration unit is run, and determines the overheat of unit
Whether the difference between degree and degree of superheat setting value exceeds predetermined threshold value, and in the case of beyond predetermined threshold value, it is swollen to obtain air-conditioning
The inlet outlet pressure differential of swollen valve.
In one embodiment, said apparatus also includes：
Adjustment module, for being adjusted in the operational mode of the condensation fan to the air-conditioning, until the inlet and outlet
Pressure difference is not more than after the predetermined threshold value, according to degree of superheat size, adjusts the aperture of electric expansion valve.
In one embodiment, in the case where condensation fan is determines frequency without high and low shift, the adjusting module is to described
The operational mode of the condensation fan of air-conditioning is adjusted, including：
In the case where compression ratio is more than preset value, control condensation fan is in running status；
In the case where the inlet outlet pressure differential is more than or equal to maximum differential pressure, control condensation fan is in running status；
In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；
Be less than maximum differential pressure in the inlet outlet pressure differential, more than or equal to minimum differntial pressure in the case of, control condensation fan
State is constant.
In one embodiment, in the case where condensation fan is determines to have high and low shift frequently, the adjusting module is to described
The operational mode of the condensation fan of air-conditioning is adjusted, including：
In the case where the inlet outlet pressure differential is more than or equal to the first preset pressure value, condensation fan high-speed cruising is controlled；
It is more than or equal to the first preset pressure value and less than or equal to the situation of the second preset pressure value in the inlet outlet pressure differential
Under, the low speed operation of control condensation fan；
In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；
It is more than the second preset pressure value in the inlet outlet pressure differential and is less than the 3rd preset pressure value, and the inlet and outlet pressure
Difference is more than or equal to minimum differntial pressure and less than in the case of the 3rd preset pressure value, controls the state of condensation fan constant；
Wherein, the first preset pressure value, the second preset pressure value, the 3rd preset pressure value are according to maximum differential pressure value and minimum
Pressure difference determines.
In the above-described embodiments, the inlet outlet pressure differential of air-conditioning expansion valve is obtained, in inlet outlet pressure differential beyond preset range
In the case of, first the operational mode of the condensation fan of air-conditioning is adjusted, until the inlet outlet pressure differential is without departing from preset range,
The regulation of electronic expansion is carried out again, so that the regulation of electric expansion valve is more accurate, to ensure the aperture of electric expansion valve
It is Significant Change.
Brief description of the drawings
The accompanying drawing for forming the part of the application is used for providing a further understanding of the present invention, schematic reality of the invention
Apply example and its illustrate to be used to explain the present invention, do not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is air conditioning control method flow chart according to embodiments of the present invention；
Fig. 2 is air conditioning control method flow chart according to embodiments of the present invention；
Fig. 3 is the structured flowchart of air conditioning control device according to embodiments of the present invention.
Embodiment
It is right with reference to embodiment and accompanying drawing for the object, technical solutions and advantages of the present invention are more clearly understood
The present invention is described in further details.Here, the exemplary embodiment of the present invention and its illustrate to be used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
In this example, it is contemplated that can pressure differential detection module by way of condensation side fan operation pattern is combined,
The aperture of electric expansion valve is controlled.Especially when height pressure difference is unsatisfactory for condition, by the operation for adjusting condensation fan
Situation causes the pressure difference to reach requirement, then carries out electronic expansion valve regulation so that the regulation of electric expansion valve is more accurate, to protect
The aperture change for demonstrate,proving electric expansion valve is effective regulation, so that the operation of whole refrigeration system is relatively reliable.
As shown in figure 1, the air-conditioning adjusting method, may include steps of：
Step 101：Obtain the inlet outlet pressure differential of air-conditioning expansion valve；
Specifically, the pressure of refrigeration unit exhaust outlet of compressor and the refrigeration unit compressor air suction mouth can be obtained
Pressure；Then, by the difference between the pressure of the exhaust outlet and the pressure of the air entry, as the pressure difference.
When realizing, can be determined when refrigeration unit is run the degree of superheat of unit and degree of superheat setting value it
Between difference whether exceed preset range, in the case of beyond preset range, obtain air-conditioning expansion valve inlet outlet pressure differential.
Step 102：In the case where the inlet outlet pressure differential exceeds preset range, to the fortune of the condensation fan of the air-conditioning
Row mode is adjusted, until the inlet outlet pressure differential is without departing from preset range.
It is adjusted in the operational mode of the condensation fan to the air-conditioning, until the inlet outlet pressure differential is without departing from described
After preset range, the aperture of electric expansion valve according to degree of superheat size, can be adjusted.
Specifically, for the difference of condensation fan type, can be controlled in different ways：
1) in the case where condensation fan is determines frequency without high and low shift, the operational mode of the condensation fan of the air-conditioning is carried out
Adjustment, can include：
A) in the case where compression ratio is more than preset value, control condensation fan is in running status；
B) in the case where the inlet outlet pressure differential is more than or equal to maximum differential pressure, control condensation fan is in running status；
C) in the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；
D) it is less than maximum differential pressure in the inlet outlet pressure differential, in the case of minimum differntial pressure, controls condensation fan
State it is constant.
2) in the case where condensation fan is determines to have high and low shift frequently, the operational mode of the condensation fan of the air-conditioning is carried out
Adjustment, can include：
A) in the case where the inlet outlet pressure differential is more than or equal to the first preset pressure value, control condensation fan is transported at a high speed
OK；For example, when Δ P >=(3*Amax+Amin)/4, condensation fan high-speed cruising；
B) it is more than or equal to the first preset pressure value and less than or equal to the feelings of the second preset pressure value in the inlet outlet pressure differential
Under condition, the low speed operation of control condensation fan；For example, when (Amax+3*Amin)/4≤Δ P≤(Amax+Amin)/2, condensating wind
Machine low speed is run；
C) in the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；For example, work as Δ P<
During Amin, condensation fan stops；
D) it is more than the second preset pressure value in the inlet outlet pressure differential and is less than the 3rd preset pressure value, and the inlet and outlet
Pressure difference is more than or equal to minimum differntial pressure and less than in the case of the 3rd preset pressure value, controls the state of condensation fan constant；For example,
When (Amax+Amin)/2<ΔP<(3*Amax+Tcmin)/4 and Amin≤Δ P<(Amax+3*Amin) when/4, condensation fan shelves
Position maintains the original state.
Wherein, above-mentioned first preset pressure value, the second preset pressure value, the 3rd preset pressure value can be pressed according to maximum
What difference and minimum differntial pressure value determined.
The above method is illustrated with reference to a specific embodiment, it is important to note, however, that the specific implementation
Example does not form the improper restriction to the application merely to the application is better described.
In this example, there is provided a kind of method of combination pressure difference control electronic expansion valve opening, effectively to solve low environment
At a temperature of, there is electronic expansion valve opening and be tuned to maximum, but the degree of superheat is still very big and the problem of refrigerating capacity drastically declines.
The detection of high-low pressure when i.e., by being run to operating mode, the start-stop of condensation side blower fan is controlled to solve because low voltage difference is led
Expansion valve opening is caused to be transferred to maximum, system overheat degree can not still adjust and system feed flow deficiency, causes what refrigerating capacity declined
Problem.
Specifically, in this example, pressure differential detection module by way of condensation side fan operation pattern is combined, to electricity
The aperture of sub- expansion valve is controlled.Especially when height pressure difference is unsatisfactory for condition, by the running situation for adjusting condensation fan
To cause pressure difference to reach requirement, then carry out electronic expansion valve regulation so that the regulation of electric expansion valve is more accurate, to ensure electricity
The aperture change of sub- expansion valve is effective regulation, so that the operation of whole refrigeration system is relatively reliable.
This invention will be directed to below carries out embodiment elaboration：
As shown in Fig. 2 when unit carries out refrigerating operaton, if detecting the degree of superheat and unit degree of superheat setting value deviation
It is larger, then first carry out pressure differential detection module；
The pressure and refrigeration unit compressor air suction mouth of the exhaust outlet of compressor of refrigeration unit are detected by high pressure sensor
Pressure, pressure differential deltap P is calculated according to the high-voltage value and low voltage value that detect.
, can be according to the aperture of the big minor adjustment electric expansion valve of the degree of superheat if Δ P is more than minimum differntial pressure setting value A；
If Δ P is less than minimum differntial pressure setting value A, condensation fan operation module is introduced into, treats that minimum differntial pressure value Δ P meets to require
When, carry out the regulation of electronic expansion valve opening further according to the size of the degree of superheat.
When unit reaches compressor start up condition, condensation fan performs according to following logic：
1) condensation fan is fixed frequency without high and low shift：
Whenever, if compression ratio (P high pressures/P low pressure) is more than 30, condenser fan necessarily be in opening；
When pressure differential deltap P is more than or equal to maximum differential pressure Amax, condensation fan operation；
When pressure differential deltap P is less than minimum differntial pressure Amin, condensation fan stops；
When pressure differential deltap P is in maximum differential pressure Amax and minimum differntial pressure Amin, condensation fan maintains the original state.
2) condensation fan has high and low shift frequently to be fixed：
When Δ P >=(3*Amax+Amin)/4, condensation fan high-speed cruising；
When (Amax+3*Amin)/4≤Δ P≤(Amax+Amin)/2, the operation of condensation fan low speed；
As Δ P<During Amin, condensation fan stops；
When (Amax+Amin)/2<ΔP<(3*Amax+Tcmin)/4 and Amin≤Δ P<(Amax+3*Amin) it is cold when/4
Solidifying blower fan gear maintains the original state；
In upper example, the height pressure difference mainly detected using unit is adjusted to the running status of condensation fan
It section, not only may insure that still system minimum differntial pressure can be met when unit is run at low ambient temperatures by this way, with
Guarantee system feed flow is sufficient and is adjusted in time according to pressure difference and plays the role of energy-conservation.
In this example, pressure differential detection module by way of condensation side fan operation pattern is combined, to electronic expansion
Valve is controlled, and especially when height pressure difference is unsatisfactory for condition, reaches pressure difference by adjusting the running situation of condensation fan
It is required that then carry out electronic expansion valve regulation so that the regulation of electric expansion valve is more accurate, it is ensured that electric expansion valve
Aperture change be effective regulation so that the operation of whole refrigeration system is relatively reliable.
Based on same inventive concept, a kind of air-conditioning adjusting means is additionally provided in the embodiment of the present invention, such as following implementation
Described in example.It is similar to air-conditioning adjusting method to solve the principle of problem due to air-conditioning adjusting means, therefore the reality of air-conditioning adjusting means
The implementation that may refer to air-conditioning adjusting method is applied, part is repeated and repeats no more.It is used below, term " unit " or " mould
Block " can realize the combination of the software and/or hardware of predetermined function.Although the device described by following examples is preferably with soft
Part is realized, but hardware, or software and hardware combination realization and may and be contemplated.Fig. 3 is of the invention real
A kind of structured flowchart of the air-conditioning adjusting means of example is applied, as shown in figure 3, can include：Acquisition module 301 and adjusting module 302,
The structure is illustrated below.
The embodiment of the present invention additionally provides a kind of air-conditioning adjusting means, to have avoided the occurrence of electronic expansion valve opening most
Greatly, the generation for the problem of but system overheat can not still be adjusted, and refrigerating capacity declines, the device include：
Acquisition module, for obtaining the inlet outlet pressure differential of air-conditioning expansion valve；
Adjusting module, in the case of exceeding preset range in the inlet outlet pressure differential, to the condensating wind of the air-conditioning
The operational mode of machine is adjusted, until the inlet outlet pressure differential is without departing from preset range.
In one embodiment, acquisition module 301 can include：Acquiring unit, for obtaining refrigeration unit compressor
The pressure of the pressure of exhaust outlet and the refrigeration unit compressor air suction mouth；Determining unit, for by the pressure of the exhaust outlet
Difference between the pressure of the air entry, as the pressure difference.
In one embodiment, the specific mistake that can be used for when refrigeration unit is run, determining unit of acquisition module 301
Whether the difference between temperature and degree of superheat setting value exceeds predetermined threshold value, in the case of beyond predetermined threshold value, obtains air-conditioning
The inlet outlet pressure differential of expansion valve.
In one embodiment, said apparatus can also include：Adjustment module, in the condensating wind to the air-conditioning
The operational mode of machine is adjusted, until after the inlet outlet pressure differential is without departing from the preset range, according to degree of superheat size,
Adjust the aperture of electric expansion valve.
In one embodiment, in the case where condensation fan is determines frequency without high and low shift, adjusting module 301 is to the sky
The operational mode of the condensation fan of tune is adjusted, and can be included：
In the case where compression ratio is more than preset value, control condensation fan is in running status；
In the case where the inlet outlet pressure differential is more than or equal to maximum differential pressure, control condensation fan is in running status；
In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；
Be less than maximum differential pressure in the inlet outlet pressure differential, more than or equal to minimum differntial pressure in the case of, control condensation fan
State is constant.
In one embodiment, in the case where condensation fan is determines to have high and low shift frequently, adjusting module 302 is to the sky
The operational mode of the condensation fan of tune is adjusted, and can be included：
In the case where the inlet outlet pressure differential is more than or equal to the first preset pressure value, condensation fan high-speed cruising is controlled；
It is more than or equal to the first preset pressure value and less than or equal to the situation of the second preset pressure value in the inlet outlet pressure differential
Under, the low speed operation of control condensation fan；
In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；
It is more than the second preset pressure value in the inlet outlet pressure differential and is less than the 3rd preset pressure value, and the inlet and outlet pressure
Difference is more than or equal to minimum differntial pressure and less than in the case of the 3rd preset pressure value, controls the state of condensation fan constant；
Wherein, the first preset pressure value, the second preset pressure value, the 3rd preset pressure value are according to maximum differential pressure value and minimum
Pressure difference determines.
In another embodiment, a kind of software is additionally provided, the software is used to perform above-described embodiment and preferred reality
Apply the technical scheme described in mode.
In another embodiment, a kind of storage medium is additionally provided, above-mentioned software is stored with the storage medium, should
Storage medium includes but is not limited to：CD, floppy disk, hard disk, scratch pad memory etc..
As can be seen from the above description, the embodiment of the present invention realizes following technique effect：Obtain air-conditioning expansion valve
Inlet outlet pressure differential, inlet outlet pressure differential exceed preset range in the case of, first the operational mode of the condensation fan of air-conditioning is entered
Row adjustment, until the inlet outlet pressure differential is without departing from predetermined threshold value, then carries out the regulation of electronic expansion, so that electronic expansion
The regulation of valve is more accurate, to ensure that the aperture of electric expansion valve is Significant Change.
Obviously, those skilled in the art should be understood that each module of the above-mentioned embodiment of the present invention or each step can be with
Realized with general computing device, they can be concentrated on single computing device, or are distributed in multiple computing devices
On the network formed, alternatively, they can be realized with the program code that computing device can perform, it is thus possible to by it
Store and performed in the storage device by computing device, and in some cases, can be to be held different from order herein
They, are either fabricated to each integrated circuit modules or will be multiple in them by the shown or described step of row respectively
Module or step are fabricated to single integrated circuit module to realize.So, the embodiment of the present invention is not restricted to any specific hard
Part and software combine.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, for the skill of this area
For art personnel, the embodiment of the present invention can have various modifications and variations.Within the spirit and principles of the invention, made
Any modification, equivalent substitution and improvements etc., should be included in the scope of the protection.
Claims (12)
- A kind of 1. air-conditioning adjusting method, it is characterised in that including：Obtain the inlet outlet pressure differential of air-conditioning expansion valve；In the case where the inlet outlet pressure differential exceeds preset range, the operational mode of the condensation fan of the air-conditioning is adjusted It is whole, until the inlet outlet pressure differential is without departing from the preset range.
- 2. according to the method for claim 1, it is characterised in that the inlet outlet pressure differential of air-conditioning expansion valve is obtained, including：Obtain the pressure of refrigeration unit exhaust outlet of compressor and the pressure of the refrigeration unit compressor air suction mouth；By the difference between the pressure of the exhaust outlet and the pressure of the air entry, as the pressure difference.
- 3. according to the method for claim 1, it is characterised in that obtaining the inlet outlet pressure differential of air-conditioning expansion valve includes：When refrigeration unit is run, determine the difference between the degree of superheat of unit and degree of superheat setting value whether beyond default threshold Value, in the case of beyond predetermined threshold value, obtain the inlet outlet pressure differential of air-conditioning expansion valve.
- 4. according to the method for claim 1, it is characterised in that carried out in the operational mode of the condensation fan to the air-conditioning Adjustment, until after the inlet outlet pressure differential is without departing from the preset range, methods described also includes：According to degree of superheat size, the aperture of electric expansion valve is adjusted.
- 5. according to the method for claim 1, it is characterised in that right in the case where condensation fan is determines frequency without high and low shift The operational mode of the condensation fan of the air-conditioning is adjusted, including：In the case where compression ratio is more than preset value, control condensation fan is in running status；In the case where the inlet outlet pressure differential is more than or equal to maximum differential pressure, control condensation fan is in running status；In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；Be less than maximum differential pressure in the inlet outlet pressure differential, more than or equal to minimum differntial pressure in the case of, control the state of condensation fan It is constant.
- 6. according to the method for claim 1, it is characterised in that right in the case where condensation fan is determines to have high and low shift frequently The operational mode of the condensation fan of the air-conditioning is adjusted, including：In the case where the inlet outlet pressure differential is more than or equal to the first preset pressure value, condensation fan high-speed cruising is controlled；It is more than or equal to the first preset pressure value and less than or equal in the case of the second preset pressure value in the inlet outlet pressure differential, controls Condensation fan low speed operation processed；In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；It is more than the second preset pressure value in the inlet outlet pressure differential and is less than the 3rd preset pressure value, and the inlet outlet pressure differential is big In equal to minimum differntial pressure and less than in the case of the 3rd preset pressure value, control the state of condensation fan constant；Wherein, the first preset pressure value, the second preset pressure value, the 3rd preset pressure value are according to maximum differential pressure value and minimum differntial pressure Value determines.
- A kind of 7. air-conditioning adjusting means, it is characterised in that including：Acquisition module, for obtaining the inlet outlet pressure differential of air-conditioning expansion valve；Adjusting module, in the case of exceeding preset range in the inlet outlet pressure differential, to the condensation fan of the air-conditioning Operational mode is adjusted, until the inlet outlet pressure differential is without departing from the preset range.
- 8. device according to claim 7, it is characterised in that the acquisition module includes：Acquiring unit, for obtaining the pressure of refrigeration unit exhaust outlet of compressor and the pressure of the refrigeration unit compressor air suction mouth Power；Determining unit, for by the difference between the pressure of the exhaust outlet and the pressure of the air entry, as the pressure difference.
- 9. device according to claim 7, it is characterised in that the acquisition module is specifically used for running in refrigeration unit When, determine whether the difference between the degree of superheat of unit and degree of superheat setting value exceeds predetermined threshold value, beyond predetermined threshold value In the case of, the inlet outlet pressure differential of acquisition air-conditioning expansion valve.
- 10. device according to claim 7, it is characterised in that also include：Adjustment module, for being adjusted in the operational mode of the condensation fan to the air-conditioning, until the inlet outlet pressure differential After the preset range, according to degree of superheat size, the aperture of electric expansion valve is adjusted.
- 11. device according to claim 7, it is characterised in that in the case where condensation fan is determines frequency without high and low shift, institute Adjusting module is stated to be adjusted the operational mode of the condensation fan of the air-conditioning, including：In the case where compression ratio is more than preset value, control condensation fan is in running status；In the case where the inlet outlet pressure differential is more than or equal to maximum differential pressure, control condensation fan is in running status；In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；Be less than maximum differential pressure in the inlet outlet pressure differential, more than or equal to minimum differntial pressure in the case of, control the state of condensation fan It is constant.
- 12. device according to claim 7, it is characterised in that in the case where condensation fan is determines to have high and low shift frequently, institute Adjusting module is stated to be adjusted the operational mode of the condensation fan of the air-conditioning, including：In the case where the inlet outlet pressure differential is more than or equal to the first preset pressure value, condensation fan high-speed cruising is controlled；It is more than or equal to the first preset pressure value and less than or equal in the case of the second preset pressure value in the inlet outlet pressure differential, controls Condensation fan low speed operation processed；In the case where the inlet outlet pressure differential is less than minimum differntial pressure, control condensation fan is shut down；It is more than the second preset pressure value in the inlet outlet pressure differential and is less than the 3rd preset pressure value, and the inlet outlet pressure differential is big In equal to minimum differntial pressure and less than in the case of the 3rd preset pressure value, control the state of condensation fan constant；Wherein, the first preset pressure value, the second preset pressure value, the 3rd preset pressure value are according to maximum differential pressure value and minimum differntial pressure Value determines.
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| CN201710876715.7A CN107631431A (en) | 2017-09-25 | 2017-09-25 | Air conditioning control method and device |
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