CN107356018A - Air-conditioning system and compressor liquid-spraying control method - Google Patents
Air-conditioning system and compressor liquid-spraying control method Download PDFInfo
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- CN107356018A CN107356018A CN201710637070.1A CN201710637070A CN107356018A CN 107356018 A CN107356018 A CN 107356018A CN 201710637070 A CN201710637070 A CN 201710637070A CN 107356018 A CN107356018 A CN 107356018A
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- hydrojet
- temperature
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- air
- temperature value
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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
- F25B41/00—Fluid-circulation arrangements
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
- F25B1/047—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
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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
- F25B49/022—Compressor control arrangements
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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
- F25B2700/00—Sensing or detecting of parameters; Sensors therefor
- F25B2700/21—Temperatures
- F25B2700/2115—Temperatures of a compressor or the drive means therefor
- F25B2700/21151—Temperatures of a compressor or the drive means therefor at the suction side of the compressor
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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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of air-conditioning system and compressor liquid-spraying control method, air-conditioning system to include：For forming compressor (1), condenser (2), first throttle unit (3) and the evaporator (4) of refrigerant circulation stream, also there is the air-breathing hydrojet stream (f1) for connecting the air entry of compressor (1) in collateral branch on refrigerant circulation stream corresponding to refrigerant outlet pipe in condenser (2), also include being arranged on the liquid uniforming mechanism (5) before the air entry of compressor (1), the refrigerant for the outlet downstream to evaporator (4) carries out in advance uniformly mixing with the refrigerant for carrying out Self inhaling hydrojet stream (f1).The present invention carries out in advance uniformly mixing to the refrigerant of evaporator refrigerant and air-breathing hydrojet stream using liquid uniforming mechanism, to promote the Region homogenization of the suction temperature field before air entry, and then the possibility that frequent fluctuation occurs for throttling unit and high frequent adds unloading is reduced, the part of air-conditioning system is adversely affected so as to eliminate the air-breathing hydrojet process of compressor as far as possible.
Description
Technical field
The present invention relates to field of air conditioning, more particularly to a kind of air-conditioning system and compressor liquid-spraying control method.
Background technology
In marine air conditioner unit, the load application of helical-lobe compressor peculiar to vessel is generally 25%~100%.But at present
There is the actual demand for the working range for extending helical-lobe compressor peculiar to vessel, it needs the lower limit by load application to expand to
20%, it is even lower.And when helical-lobe compressor peculiar to vessel operates in underload, because refrigerant circulation is fewer, for cooling down
The cold deficiency of compressor electric motor, often causes compressor motor overheating or discharge superheat to be protected, or even shut down.
In order to solve this problem, the supplement that refrigerant circulation is carried out by the way of air-breathing hydrojet main at present, i.e., from
Subcooled liquid is taken after condenser, compressor air suction mouth is returned to by throttling, the mode of suction temperature is reduced using subcooled liquid
Make the delivery temperature of compressor reduce.But the mode of this air-breathing hydrojet can cause temperature field areas unbalanced, and temperature place
The unbalanced aperture for causing the electric expansion valve in marine air conditioner unit in domain frequently changes, and in turn results in helical-lobe compressor frequency peculiar to vessel
Numerous plus unloading, cause the water temperature of water supply unstable.
The content of the invention
The purpose of the present invention is to propose to a kind of air-conditioning system and compressor liquid-spraying control method, can eliminate compressor as far as possible
Air-breathing hydrojet process the part of air-conditioning system is adversely affected.
To achieve the above object, the invention provides a kind of air-conditioning system, including：For forming the pressure of refrigerant circulation stream
Contracting machine, condenser, first throttle unit and evaporator, corresponding to the refrigerant outlet pipe in the condenser on refrigerant circulation stream also
There is the air-breathing hydrojet stream for connecting the air entry of the compressor in collateral branch, wherein, in addition to it is arranged on the compressor
Liquid uniforming mechanism before air entry, for the refrigerant of the outlet downstream to the evaporator and from the air-breathing hydrojet stream
Refrigerant carries out in advance uniformly mixing.
Further, the liquid uniforming mechanism includes knockout or the liquid-distributing plate with multi-hole position.
Further, hydrojet valve is provided with the air-breathing hydrojet stream, for controlling the air-breathing hydrojet stream
Break-make.
Further, set on the refrigerant circulation stream between the air entry of the liquid uniforming mechanism and the compressor more
Individual first temperature sampling point, the air-conditioning system also include control unit, and described control unit can be according to each institute of reception
Temperature value after hydrojet when stating temperature value before hydrojet of the first temperature sampling point when the hydrojet valve is closed and opening, control
The aperture of the first throttle unit and/or the load of the compressor add unloading.
Further, the multiple first temperature sampling point is at least three, and along between the air entry of the compressor
Refrigerant circulation stream circumference on uniform intervals set.
Further, second temperature sampled point is additionally provided with the refrigerant circulation stream before the liquid uniforming mechanism, it is described
Control unit can also according to temperature value after hydrojet of the second temperature sampled point of reception in the hydrojet valve opening,
The aperture of the first throttle unit and/or the load of the compressor is controlled to add unloading.
Further, the first throttle unit includes electric expansion valve, and the hydrojet valve includes hydrojet magnetic valve, institute
Electric expansion valve and the hydrojet magnetic valve is stated to communicate to connect with described control unit.
Further, the compressor is helical-lobe compressor peculiar to vessel, and the air-conditioning system is marine air conditioner unit.
To achieve the above object, the invention provides a kind of compressor liquid-spraying controlling party based on foregoing air-conditioning system
Method, including：
Described control unit receives temperature value before hydrojet of each first temperature sampling point when the hydrojet valve is closed
With temperature value after hydrojet when opening；
Temperature value control after temperature value and hydrojet before described control unit hydrojet according to corresponding to each first temperature sampling point
Make the aperture of the first throttle unit and/or the load of the compressor adds unloading.
Further, before described control unit hydrojet according to corresponding to each first temperature sampling point after temperature value and hydrojet
Temperature value controls the aperture of the first throttle unit and/or the load of the compressor to add the operation of unloading to specifically include：
Described control unit calculates temperature value and temperature value after hydrojet before the hydrojet of each first temperature sampling point respectively
Absolute difference, and by absolute difference corresponding to each first temperature sampling point compared with the first preset temperature difference；
If the absolute difference of temperature value and temperature value after hydrojet does not surpass before the hydrojet of each first temperature sampling point
The first preset temperature difference is crossed, then described control unit performs the aperture of the first throttle unit and/or the compressor
Load adds the conventional control of unloading.
Further, if the difference of temperature value and temperature value after hydrojet is absolute before the hydrojet of each first temperature sampling point
Any absolute difference in value then further performs the step of more than the first preset temperature difference：
Described control unit calculates the difference of temperature value after hydrojet in each first temperature sampling point between any two respectively
Absolute value, and by each group absolute difference compared with the second preset temperature difference；
If each group absolute difference performs described first not less than the second preset temperature difference, described control unit
The load of the aperture of throttling unit and/or the compressor adds the conventional control of unloading, and otherwise described control unit is in hydrojet mistake
The aperture of the first throttle unit and/or the load of the compressor is maintained not to change in journey.
Further, described control unit receives hydrojet of each first temperature sampling point when the hydrojet valve is closed
The operation of temperature value includes after hydrojet when preceding temperature value and unlatching：
Described control unit continuously receives each first temperature sampling point when the hydrojet valve is closed during multiple units
Between under hydrojet before temperature value and open when multiple unit interval under hydrojet after temperature value.
Further, temperature value and hydrojet before described control unit hydrojet according to corresponding to each first temperature sampling point
Before the aperture of the temperature value control first throttle unit and/or the load of the compressor add unloading afterwards, in addition to：
Described control unit is under temperature value and multiple unit interval before the hydrojet under multiple unit interval for receiving
Temperature value asks for arithmetic mean of instantaneous value respectively after hydrojet, and the arithmetic mean of instantaneous value of temperature value is used as the first temperature sampling point using before hydrojet
Temperature value before corresponding hydrojet, it is warm after hydrojet corresponding to the arithmetic mean of instantaneous value of temperature value as the first temperature sampling point using after hydrojet
Angle value.
Further, second temperature sampled point is additionally provided with the refrigerant circulation stream before the liquid uniforming mechanism, it is described
Compressor liquid-spraying control method also includes：
Described control unit receives temperature value after hydrojet of the second temperature sampled point in the hydrojet valve opening；
By absolute difference is compared with the first preset temperature difference corresponding to each first temperature sampling point when, such as
The absolute difference of temperature value and temperature value after hydrojet is default not less than first before the hydrojet of each first temperature sampling point of fruit
Temperature gap, then described control unit the first throttle unit is performed according to temperature value after the hydrojet of second temperature sampled point
The load of aperture and/or the compressor adds the conventional control of unloading；
When by each group absolute difference compared with the second preset temperature difference, if each group absolute difference is not
More than the second preset temperature difference, then described control unit performs according to temperature value after the hydrojet of any one the first temperature sampling point
The aperture of the first throttle unit and/or the load of the compressor add the conventional control of unloading.
Based on above-mentioned technical proposal, the present invention sets liquid uniforming mechanism before compressor air suction mouth, utilizes liquid uniforming mechanism pair
The refrigerant of the outlet downstream of evaporator and the refrigerant progress uniformly mixing in advance for carrying out Self inhaling hydrojet stream, to promote compressor to inhale
The Region homogenization of suction temperature field before gas port, and then reduce throttling unit in air-conditioning system and frequent fluctuation and compressor occurs
Frequently add the possibility of unloading, so as to eliminate part adverse effect of the air-breathing hydrojet process of compressor to air-conditioning system as far as possible.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the principle schematic of an embodiment of air-conditioning system of the present invention.
Fig. 2 is the arrangement examples schematic diagram of the first temperature sampling point in air-conditioning system of the present invention.
Embodiment
Below by drawings and examples, technical scheme is described in further detail.
As shown in figure 1, the principle schematic of the embodiment for air-conditioning system of the present invention.In the present embodiment, air-conditioning system
System includes：For forming compressor 1, condenser 2, first throttle unit 3 and the evaporator 4 of refrigerant circulation stream.Described cold
Also there is the air-breathing for connecting the air entry of the compressor 1 in collateral branch on refrigerant circulation stream corresponding to the refrigerant outlet pipe of condenser 2
Hydrojet stream f1.By taking the air conditioner coolant circulation stream shown in Fig. 1 as an example, when compressor 1 starts, row of the refrigerant from compressor 1
Gas port is discharged, and the cooling water for entering back into the entrance of condenser 2 and d mouths is exchanged heat, and the cooling water for absorbing heat is discharged from c mouths, cold
By first throttle unit 3 (such as electric expansion valve 3 in Fig. 1 etc.) reducing pressure by regulating flow after refrigerant exothermic condensation in condenser 2, then it is defeated
It is sent to the chilled water with a mouths entered in evaporator 4 to be exchanged heat, exothermic chilled water is discharged from b mouths, and absorbs heat
Refrigerant is transported to the air entry of compressor 1, so as to form conventional refrigerant circulation process.In Fig. 1 except above-mentioned air-conditioning system
In primary element outside, also include other function element, such as stop valve 9,11, magnetic valve 10 etc., for controlling refrigerant
The break-make of circulation.
Air-breathing hydrojet stream f1 one end is arranged on the refrigerant between the refrigerant outlet pipe of condenser 2 and first throttle unit 3
Circulate on stream, the other end is then arranged between the outlet of air entry and evaporator 4 of compressor 1.Air-breathing hydrojet stream f1
Can future condenser 2 the part refrigerant of refrigerant outlet pipe the cold of gas-liquid mixed form is formed by way of reducing pressure by regulating flow
Matchmaker, and into the air entry of compressor 1 together with the refrigerant that evaporator 4 is discharged, so as to reduce the delivery temperature of compressor 1.For
Reducing pressure by regulating flow is realized in air-breathing hydrojet stream f1, the second restricting element 7, the section can be set on air-breathing hydrojet stream f1
Fluid element can use electric expansion valve, restricting orifice or capillary etc..In addition, the refrigerant outlet pipe in condenser 2 is sprayed to air-breathing
Device for drying and filtering can also be set on refrigerant circulation stream between the f1 of liquid stream road, to remove in the refrigerant of the discharge of condenser 2
Impurity, and the moisture in refrigerant is adsorbed, to ensure the normal operation of air-conditioning system.
With reference to figure 1, liquid uniforming mechanism 5 can also be increased in the air-conditioning system of the present embodiment, such as including knockout or tool
There is the liquid-distributing plate of multi-hole position.The liquid uniforming mechanism 5 is arranged on before the air entry of the compressor 1, for the evaporator 4
The refrigerant of outlet downstream and the refrigerant progress uniformly mixing in advance from the air-breathing hydrojet stream f1.By liquid uniforming mechanism to steaming
The advance uniformly mixing of the refrigerant for sending out the outlet downstream of device and the refrigerant for carrying out Self inhaling hydrojet stream, can promote compressor air suction
The Region homogenization of suction temperature field before mouthful, and then reduce throttling unit in air-conditioning system and frequent fluctuation and compressor frequency occurs
Numerous plus unloading possibility, the part of air-conditioning system is adversely affected so as to eliminate the air-breathing hydrojet process of compressor as far as possible.
In order to control the break-make of the air-breathing hydrojet stream f1, liquid injection valve can be set in the air-breathing hydrojet stream f1
Door 6, for controlling the break-make of the air-breathing hydrojet stream f1.If air-conditioning system need not carry out air-breathing hydrojet to compressor,
Imbibition valve 6 can be then closed, and when needing air-breathing hydrojet, imbibition valve 6 can be opened.The imbibition valve 6 can pass through people
Work mode is controlled, and can also be automatically controlled using controller, accordingly preferably using hydrojet magnetic valve as imbibition
Valve 6.
, in Fig. 1 can be in liquid uniforming mechanism 5 and compressor 1 in order to desorb temperature uniform situation of the gas port in different zones
Multiple first temperature sampling point T1, T2, T3, T4 can be set on the refrigerant circulation stream between air entry.Multiple first temperature
Sampled point T1, T2, T3, T4 at least three, and along in the circumference of the refrigerant circulation stream between the air entry of the compressor 1
Uniform intervals are set.Such as shown in Fig. 2, the circumference of the refrigerant circulation stream between the air entry of compressor 1 presses every 90 degree of cloth
Four the first temperature sampling points are equipped with, the temperature of air entry can be measured on four direction.
Automatically controlled to realize, control unit can be added within air-conditioning systems, the control unit can be according to reception
Hydrojets of each first temperature sampling point T1, T2, T3, T4 when the hydrojet valve 6 is closed before temperature value and unlatching
When hydrojet after temperature value, control the aperture of the first throttle unit 3 and/or the load of the compressor 1 to add unloading.Here
3 preferred electric expansion valve of first throttle unit, electric expansion valve communicate to connect with control unit.
Specifically, control unit calculates temperature value before each first temperature sampling point T1, T2, T3, T4 hydrojet respectively
With the absolute difference of temperature value after hydrojet | T1Before hydrojet-T1After hydrojet|、|T2Before hydrojet-T2After hydrojet|、|T3Before hydrojet-T3After hydrojet|、|T4Before hydrojet-
T4After hydrojet|, then by absolute difference corresponding to each first temperature sampling point T1, T2, T3, T4 and the first preset temperature difference A
It is compared.If the difference of temperature value and temperature value after hydrojet before each first temperature sampling point T1, T2, T3, T4 hydrojet
Absolute value is not less than the first preset temperature difference, i.e., | T1Before hydrojet-T1After hydrojet|、|T2Before hydrojet-T2After hydrojet|、|T3Before hydrojet-T3After hydrojet|、|
T4Before hydrojet-T4After hydrojet|≤A, illustrate that hydrojet is front and rear influences less on suction temperature field, therefore control unit can perform described the
The load of the aperture of one throttling unit and/or the compressor adds the conventional control of unloading, such as is adopted with some first temperature
Temperature value of the sampling point after hydrojet judges include electric expansion valve as benchmark according to the situation of change of suction superheat
The aperture control action of one throttling unit, and adjusted according to the PID of refrigerant water outlet target temperature to judge the load of compressor
Add unloading.
Furthermore it is also possible to second temperature sampled point is further set on the refrigerant circulation stream before liquid uniforming mechanism 5
T1a.During the conventional control of aforementioned control unit, control unit can also be according to the second temperature sampled point of reception
Temperature value T1a after hydrojets of the T1a when the hydrojet valve 6 is openedAfter hydrojetControl the aperture of first throttle unit 3 and/or described
The load of compressor 1 adds unloading.
If the difference of temperature value and temperature value after hydrojet is exhausted before each first temperature sampling point T1, T2, T3, T4 hydrojet
To any absolute difference in value more than the first preset temperature difference, i.e., | T1Before hydrojet-T1After hydrojet|、|T2Before hydrojet-T2After hydrojet|、|
T3Before hydrojet-T3After hydrojet|、|T4Before hydrojet-T4After hydrojetAny of |>A, then it can further perform the step of：
Described control unit calculates temperature after hydrojet in each first temperature sampling point T1, T2, T3, T4 between any two respectively
The absolute difference of angle value, i.e., | T1After hydrojet-T2After hydrojet|、|T2After hydrojet-T3After hydrojet|、|T3After hydrojet-T4After hydrojet|、|T4After hydrojet-T1After hydrojet|、|
T1After hydrojet-T3After hydrojet|、|T2After hydrojet-T4After hydrojet|, then by each group absolute difference compared with the second preset temperature difference B.Such as
Fruit each group absolute difference is not less than the second preset temperature difference, i.e., | T1After hydrojet-T2After hydrojet|、|T2After hydrojet-T3After hydrojet|、|
T3After hydrojet-T4After hydrojet|、|T4After hydrojet-T1After hydrojet|、|T1After hydrojet-T3After hydrojet|、|T2After hydrojet-T4After hydrojet|≤B, then described control unit hold
The aperture of the row first throttle unit 3 and/or the load of the compressor 1 add the conventional control of unloading.Such as with some
Temperature value of the first temperature sampling point after hydrojet judges to include electronics as benchmark according to the situation of change of suction superheat
The aperture control action of the first throttle unit of expansion valve, and adjusted according to the PID of refrigerant water outlet target temperature to judge to press
The load of contracting machine adds unloading.Wherein, A>B.
If each group absolute difference any one more than the second preset temperature difference, i.e., | T1After hydrojet-T2After hydrojet|、|T2After hydrojet-
T3After hydrojet|、|T3After hydrojet-T4After hydrojet|、|T4After hydrojet-T1After hydrojet|、|T1After hydrojet-T3After hydrojet|、|T2After hydrojet-T4After hydrojetAny of |>B, then control
Unit processed is forced to maintain the aperture of the first throttle unit 3 not change during hydrojet, does not open and does not also turn down greatly；Also can be strong
System maintains the load of the compressor 1 not change, and is not loaded with also not unloading, until hydrojet terminates pressure control behaviour after terminating
Make.The effect of the operation is to prevent now temperature field is unbalanced from causing suction temperature sampling constantly change, and it is swollen in turn result in electronics
Swollen valve does not turn off frequent fluctuation that is big or turning down, and the continuous adjustment of compressor load.
In order to embody the accuracy of temperature sampling, control unit can continuously receive each first when receiving temperature signal
Temperature value and unlatching before hydrojets of the temperature sampling point T1, T2, T3, T4 when the hydrojet valve 6 is closed under multiple unit interval
When multiple unit interval under hydrojet after temperature value, and temperature value and more before the hydrojet under multiple unit interval to receiving
Temperature value asks for arithmetic mean of instantaneous value respectively after hydrojet under the individual unit interval, and using before hydrojet temperature value arithmetic mean of instantaneous value as
Temperature value before hydrojet corresponding to first temperature sampling point T1, T2, T3, T4, the arithmetic mean of instantaneous value of temperature value is used as using after hydrojet
Temperature value after hydrojet corresponding to one temperature sampling point T1, T2, T3, T4.
Compressor 1 in foregoing air-conditioning system can be adopted as helical-lobe compressor peculiar to vessel, and accordingly air-conditioning system is sky peculiar to vessel
Adjust unit.By the setting of foregoing liquid uniforming mechanism and the control function of control unit, helical-lobe compressor peculiar to vessel can be improved and existed
The unbalanced problem in temperature field under running on the lower load so that marine air conditioner unit can better meet lower load condition.
Each embodiment based on foregoing air-conditioning system, present invention also offers compressor liquid-spraying control method, including：
Described control unit receives each first temperature sampling point T1, T2, T3, T4 when the hydrojet valve 6 is closed
Temperature value and temperature value after hydrojet when opening before hydrojet；
Temperature value and hydrojet before described control unit hydrojet according to corresponding to each first temperature sampling point T1, T2, T3, T4
Temperature value controls the aperture of the first throttle unit 3 and/or the load of the compressor 1 to add unloading afterwards.
Further, it is warm before described control unit hydrojet according to corresponding to each first temperature sampling point T1, T2, T3, T4
Temperature value controls the aperture of the first throttle unit 3 and/or the load of the compressor 1 to add the behaviour of unloading after angle value and hydrojet
Specifically include：
Described control unit calculates temperature value and hydrojet before each first temperature sampling point T1, T2, T3, T4 hydrojet respectively
The absolute difference of temperature value afterwards, and by absolute difference and first corresponding to each first temperature sampling point T1, T2, T3, T4
Preset temperature difference is compared；
If the difference of temperature value and temperature value after hydrojet is exhausted before each first temperature sampling point T1, T2, T3, T4 hydrojet
To being worth not less than the first preset temperature difference, then described control unit performs aperture and/or the institute of the first throttle unit 3
The load for stating compressor 1 adds the conventional control of unloading.
In another embodiment, if temperature value and spray before each first temperature sampling point T1, T2, T3, T4 hydrojet
Any absolute difference after liquid in the absolute difference of temperature value then further performs following more than the first preset temperature difference
Step：
Described control unit calculates temperature after hydrojet in each first temperature sampling point T1, T2, T3, T4 between any two respectively
The absolute difference of angle value, and by each group absolute difference compared with the second preset temperature difference；
If each group absolute difference performs described first not less than the second preset temperature difference, described control unit
The load of the aperture of throttling unit 3 and/or the compressor 1 adds the conventional control of unloading, and otherwise described control unit is in hydrojet
During maintain the aperture of the first throttle unit 3 and/or the load of the compressor 1 not to change.
In another embodiment, described control unit receives each first temperature sampling point T1, and T2, T3, T4 is described
The operation of temperature value and temperature value after hydrojet when opening includes before hydrojet when hydrojet valve 6 is closed：Described control unit connects
Hydrojets of each first temperature sampling point T1, T2, T3, T4 when the hydrojet valve 6 is closed under multiple unit interval is received in continued access
Temperature value after hydrojet when preceding temperature value and unlatching under multiple unit interval.
Accordingly, it is warm before described control unit hydrojet according to corresponding to each first temperature sampling point T1, T2, T3, T4
Temperature value controls the aperture of the first throttle unit 3 and/or the load of the compressor 1 to add unloading after angle value and hydrojet
Before, it can also include：When described control unit is to temperature value before the hydrojet under multiple unit interval for receiving and multiple units
Between under hydrojet after temperature value ask for arithmetic mean of instantaneous value respectively, and the arithmetic mean of instantaneous value of temperature value is used as the first temperature using before hydrojet
Temperature value before hydrojet corresponding to sampled point T1, T2, T3, T4, the arithmetic mean of instantaneous value of temperature value is adopted as the first temperature using after hydrojet
Temperature value after hydrojet corresponding to sampling point T1, T2, T3, T4.
In another embodiment, second temperature is additionally provided with the refrigerant circulation stream before the liquid uniforming mechanism 5 to adopt
Sampling point T1a, the compressor liquid-spraying control method can also include：
Described control unit receives temperature value after hydrojets of the second temperature sampled point T1a when the hydrojet valve 6 is opened；
Enter by absolute difference corresponding to each first temperature sampling point T1, T2, T3, T4 with the first preset temperature difference
Row relatively when, if before each first temperature sampling point T1, T2, T3, T4 hydrojet after temperature value and hydrojet temperature value difference
Absolute value is not less than the first preset temperature difference, then warm after hydrojet of the described control unit according to second temperature sampled point T1a
Angle value performs the aperture of the first throttle unit 3 and/or the load of the compressor 1 adds the conventional control of unloading；
When by each group absolute difference compared with the second preset temperature difference, if each group absolute difference is not
More than the second preset temperature difference, then described control unit is according to any one the first temperature sampling point T1, T2, T3, T4 hydrojet
Temperature value performs the aperture of the first throttle unit 3 afterwards and/or the load of the compressor 1 adds the conventional control of unloading.
Multiple embodiments are described by the way of progressive in this specification, and the emphasis of each embodiment is different, and each
Same or analogous part cross-reference between embodiment.For embodiment of the method, due to its entirety and it is related to
The step of with the content in system embodiment corresponding relation be present, therefore describe fairly simple, related part is real referring to system
Apply the part explanation of example.
Finally it should be noted that:The above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, those of ordinary skills in the art should understand that：Still
The embodiment of the present invention can be modified or equivalent substitution is carried out to some technical characteristics；Without departing from this hair
The spirit of bright technical scheme, it all should cover among the claimed technical scheme scope of the present invention.
Claims (14)
1. a kind of air-conditioning system, including：For forming the compressor (1), condenser (2), first throttle list of refrigerant circulation stream
First (3) and evaporator (4), also collateral branch has for connecting on refrigerant circulation stream corresponding to the refrigerant outlet pipe in the condenser (2)
Lead to the air-breathing hydrojet stream (f1) of the air entry of the compressor (1), it is characterised in that also include being arranged on the compressor
(1) liquid uniforming mechanism (5) before air entry, for the refrigerant of the outlet downstream to the evaporator (4) and from the suction
The refrigerant on gas blowout liquid stream road (f1) carries out in advance uniformly mixing.
2. air-conditioning system according to claim 1, it is characterised in that the liquid uniforming mechanism (5) includes knockout or had
The liquid-distributing plate of multi-hole position.
3. air-conditioning system according to claim 1, it is characterised in that be provided with hydrojet in the air-breathing hydrojet stream (f1)
Valve (6), for controlling the break-make of the air-breathing hydrojet stream (f1).
4. air-conditioning system according to claim 3, it is characterised in that in the liquid uniforming mechanism (5) and the compressor (1)
Air entry between refrigerant circulation stream on multiple first temperature sampling points (T1, T2, T3, T4), the air-conditioning system are set
Also include control unit, described control unit can be according to each first temperature sampling point (T1, T2, T3, T4) of reception
Temperature value and temperature value after hydrojet when opening, control the first throttle before hydrojet when the hydrojet valve (6) is closed
The aperture of unit (3) and/or the load of the compressor (1) add unloading.
5. air-conditioning system according to claim 4, it is characterised in that the multiple first temperature sampling point (T1, T2, T3,
T4 it is) at least three, and uniform intervals are set along in the circumference of the refrigerant circulation stream between the air entry of the compressor (1)
Put.
6. air-conditioning system according to claim 4, it is characterised in that the refrigerant circulation before the liquid uniforming mechanism (5)
Second temperature sampled point (T1a) is additionally provided with stream, described control unit can also sample according to the second temperature of reception
Temperature value after hydrojet of the point (T1a) when the hydrojet valve (6) is opened, control the first throttle unit (3) aperture and/
Or the load of the compressor (1) adds unloading.
7. air-conditioning system according to claim 4, it is characterised in that the first throttle unit (3) includes electronic expansion
Valve, the hydrojet valve (6) include hydrojet magnetic valve, and the electric expansion valve and the hydrojet magnetic valve are single with the control
Member communication connection.
8. according to any described air-conditioning system of claim 1~7, it is characterised in that the compressor (1) is screw rod pressure peculiar to vessel
Contracting machine, the air-conditioning system are marine air conditioner unit.
A kind of 9. compressor liquid-spraying control method based on any described air-conditioning system of claim 4~7, it is characterised in that
Including：
Described control unit receives each first temperature sampling point (T1, T2, T3, T4) when the hydrojet valve (6) is closed
Temperature value and temperature value after hydrojet when opening before hydrojet；
Before described control unit hydrojet according to corresponding to each first temperature sampling point (T1, T2, T3, T4) after temperature value and hydrojet
Temperature value controls the aperture of the first throttle unit (3) and/or the load of the compressor (1) to add unloading.
10. compressor liquid-spraying control method according to claim 9, it is characterised in that described control unit is according to each
Temperature value controls the first throttle list after temperature value and hydrojet before hydrojet corresponding to first temperature sampling point (T1, T2, T3, T4)
First aperture of (3) and/or the load of the compressor (1) add the operation of unloading to specifically include：
Described control unit calculate respectively before the hydrojet of each first temperature sampling point (T1, T2, T3, T4) temperature value with after hydrojet
The absolute difference of temperature value, and by absolute difference and first corresponding to each first temperature sampling point (T1, T2, T3, T4)
Preset temperature difference is compared；
If the difference of temperature value and temperature value after hydrojet is absolute before the hydrojet of each first temperature sampling point (T1, T2, T3, T4)
Value is not less than the first preset temperature difference, then described control unit performs aperture and/or the institute of the first throttle unit (3)
The load for stating compressor (1) adds the conventional control of unloading.
11. compressor liquid-spraying control method according to claim 10, it is characterised in that if each first temperature sampling
Temperature value exceedes with any absolute difference in the absolute difference of temperature value after hydrojet before the hydrojet of point (T1, T2, T3, T4)
First preset temperature difference, then further perform the step of：
Described control unit calculates temperature after hydrojet in each first temperature sampling point (T1, T2, T3, T4) between any two respectively
The absolute difference of value, and by each group absolute difference compared with the second preset temperature difference；
If each group absolute difference performs the first throttle not less than the second preset temperature difference, described control unit
The aperture of unit (3) and/or the load of the compressor (1) add the conventional control of unloading, and otherwise described control unit is in hydrojet
During maintain the aperture of the first throttle unit (3) and/or the load of the compressor (1) not to change.
12. compressor liquid-spraying control method according to claim 9, it is characterised in that described control unit receives each
Temperature value and spray when opening before hydrojet of the first temperature sampling point (T1, T2, T3, T4) when the hydrojet valve (6) is closed
The operation of temperature value includes after liquid：
Described control unit continuously receives each first temperature sampling point (T1, T2, T3, T4) and closed in the hydrojet valve (6)
When multiple unit interval under hydrojet before temperature value and open when multiple unit interval under hydrojet after temperature value.
13. compressor liquid-spraying control method according to claim 12, it is characterised in that in described control unit according to each
Temperature value controls the first throttle after temperature value and hydrojet before hydrojet corresponding to individual first temperature sampling point (T1, T2, T3, T4)
Before the aperture of unit (3) and/or the load of the compressor (1) add unloading, in addition to：
Described control unit is to the hydrojet under temperature value and multiple unit interval before the hydrojet under multiple unit interval for receiving
Temperature value asks for arithmetic mean of instantaneous value respectively afterwards, and using before hydrojet temperature value arithmetic mean of instantaneous value as the first temperature sampling point (T1,
T2, T3, T4) corresponding to temperature value before hydrojet, using after hydrojet the arithmetic mean of instantaneous value of temperature value as the first temperature sampling point (T1,
T2, T3, T4) corresponding to temperature value after hydrojet.
14. compressor liquid-spraying control method according to claim 11, it is characterised in that the liquid uniforming mechanism (5) it
Second temperature sampled point (T1a) is additionally provided with preceding refrigerant circulation stream, the compressor liquid-spraying control method also includes：
Described control unit receives temperature value after hydrojet of the second temperature sampled point (T1a) when the hydrojet valve (6) is opened；
Carried out by absolute difference corresponding to each first temperature sampling point (T1, T2, T3, T4) and the first preset temperature difference
When comparing, if before the hydrojet of each first temperature sampling point (T1, T2, T3, T4) after temperature value and hydrojet temperature value difference
Absolute value is not less than the first preset temperature difference, then after hydrojet of the described control unit according to second temperature sampled point (T1a)
Temperature value performs the aperture of the first throttle unit (3) and/or the load of the compressor (1) adds the conventional control of unloading；
When by each group absolute difference compared with the second preset temperature difference, if each group absolute difference not less than
Second preset temperature difference, then after hydrojet of the described control unit according to any one the first temperature sampling point (T1, T2, T3, T4)
Temperature value performs the aperture of the first throttle unit (3) and/or the load of the compressor (1) adds the conventional control of unloading.
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| CN201710637070.1A CN107356018B (en) | 2017-07-31 | 2017-07-31 | Air conditioning system and compressor spray control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710637070.1A CN107356018B (en) | 2017-07-31 | 2017-07-31 | Air conditioning system and compressor spray control method |
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| CN107356018B CN107356018B (en) | 2023-08-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110822752A (en) * | 2019-10-26 | 2020-02-21 | 浙江国祥股份有限公司 | Screw water cooler with novel capacity adjusting device and control method |
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| CN101858706A (en) * | 2010-07-01 | 2010-10-13 | 杭州沈氏换热器有限公司 | Liquid separating device |
| CN202371820U (en) * | 2011-12-23 | 2012-08-08 | 珠海格力电器股份有限公司 | Air conditioner |
| JP2015014372A (en) * | 2013-07-03 | 2015-01-22 | 日立アプライアンス株式会社 | Air conditioner |
| CN105402958A (en) * | 2015-12-29 | 2016-03-16 | 海信（山东）空调有限公司 | Air conditioner and control method of air conditioning refrigerants |
| CN207095074U (en) * | 2017-07-31 | 2018-03-13 | 珠海格力电器股份有限公司 | Air-conditioning system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101858706A (en) * | 2010-07-01 | 2010-10-13 | 杭州沈氏换热器有限公司 | Liquid separating device |
| CN202371820U (en) * | 2011-12-23 | 2012-08-08 | 珠海格力电器股份有限公司 | Air conditioner |
| JP2015014372A (en) * | 2013-07-03 | 2015-01-22 | 日立アプライアンス株式会社 | Air conditioner |
| CN105402958A (en) * | 2015-12-29 | 2016-03-16 | 海信（山东）空调有限公司 | Air conditioner and control method of air conditioning refrigerants |
| CN207095074U (en) * | 2017-07-31 | 2018-03-13 | 珠海格力电器股份有限公司 | Air-conditioning system |
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| CN110822752A (en) * | 2019-10-26 | 2020-02-21 | 浙江国祥股份有限公司 | Screw water cooler with novel capacity adjusting device and control method |
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| CN107356018B (en) | 2023-08-08 |
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