CN104791966A - Air conditioner and low-temperature cooling control method and device of air conditioner - Google Patents
Air conditioner and low-temperature cooling control method and device of air conditioner Download PDFInfo
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- CN104791966A CN104791966A CN201510167155.9A CN201510167155A CN104791966A CN 104791966 A CN104791966 A CN 104791966A CN 201510167155 A CN201510167155 A CN 201510167155A CN 104791966 A CN104791966 A CN 104791966A
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- temperature
- fan
- rotation speed
- air
- conditioner
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The invention discloses an air conditioner and a low-temperature cooling control method and device of the air conditioner. The low-temperature cooling control method of the air conditioner includes the following steps: detecting the current temperature of the outdoor environment; judging a temperature interval to which the current temperature of the outdoor environment belongs, wherein the temperature of the outdoor environment is divided into a plurality of temperature intervals, and each temperature interval corresponds to one draught fan rotating speed; controlling the air conditioner to run in the cooling mode, and controlling an outdoor draught fan of the air conditioner to run at the draught fan rotating speed corresponding to the temperature interval to which the current temperature of the outdoor environment belongs. In this way, the cooling requirement of a user in the low-temperature environment can be met; for example, the air conditioner can normally carry out cooling at the temperature ranging from -15 DEG C to 20 DEG C, and the requirement that 100% of the cooling capacity is output can be met.
Description
Technical field
The present invention relates to technical field of electric appliances, particularly a kind of cryogenic refrigeration control method of air-conditioner, a kind of low-temperature refrigeration control device of air-conditioner and a kind of air-conditioner.
Background technology
Along with air-conditioner uses the expanding day of crowd, user is also more and more higher to the instructions for use desired by air-conditioner.Because the heatings such as indoor human body, lighting, electric equipment and gas utensil can make indoor temperature raise, and the good heat-insulation effect of modern building design material, leakage heat are little, under outdoor low temperature condition, such as outdoor environment temperature at-15 DEG C within the scope of 0 DEG C, indoor still have refrigeration demand, particularly crowded place, the densely populated place such as such as meeting room, dancing hall, passenger station, kitchen and the large place of amount of exercise, indoor temperature is usually higher than outdoor low temperature environment temperature, and indoor refrigeration is very necessary.
But, in the related, air-conditioner indoor design temperature is in cooling mode 27 DEG C, designed outside temperature is 35 DEG C, the indoor scope of application be 17-32 DEG C and outdoor application scope is 0-50 DEG C, thus have ignored user at low ambient temperatures to the demand of refrigeration.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is to propose a kind of cryogenic refrigeration control method that can meet the air-conditioner of user's refrigeration demand at low ambient temperatures.
Another object of the present invention is the low-temperature refrigeration control device proposing a kind of air-conditioner.Another object of the present invention is to propose a kind of air-conditioner.
For achieving the above object, the cryogenic refrigeration control method of a kind of air-conditioner that the embodiment of the present invention proposes, comprises the following steps: detect current outdoor environment temperature; Judge the temperature range belonging to current outdoor environment temperature, wherein, outdoor environment temperature is divided into multiple temperature range, and the corresponding rotation speed of fan of each described temperature range; Control described air-conditioner run in a chiller mode and the outdoor fan controlling described air-conditioner according to rotation speed of fan running corresponding to the temperature range belonging to described current outdoor environment temperature.
According to the cryogenic refrigeration control method that the embodiment of the present invention proposes, detect current outdoor environment temperature, and judge the temperature range belonging to current outdoor environment temperature, and control air-conditioner and run in a chiller mode and controls outdoor fan and operate according to rotation speed of fan corresponding to the temperature range belonging to current outdoor environment temperature, thus, user's refrigeration demand at low ambient temperatures can be met, air-conditioner such as can be made still can normally to freeze between-15 DEG C to 20 DEG C, and refrigerating capacity 100% can be met export demand.
According to a specific embodiment of the present invention, the outdoor fan controlling described air-conditioner operates according to the rotation speed of fan that the temperature range belonging to described current outdoor environment temperature is corresponding, specifically comprise: when described current outdoor environment temperature belongs to first temperature range, control described outdoor fan to operate with the first rotation speed of fan, wherein, the temperature in described first temperature range is greater than the first preset temperature; When described current outdoor environment temperature belongs to the i-th+1 temperature range, control described outdoor fan to operate with the i-th+1 rotation speed of fan, wherein, the temperature in described the i-th+1 temperature range is greater than the i-th+1 preset temperature and is less than or equal to the i-th preset temperature, i-th+1 rotation speed of fan is less than or equal to described i-th rotation speed of fan, i=1,2,3,4,5,6,7; When described current outdoor environment temperature belongs to the 9th temperature range, control described outdoor fan to operate with the 9th rotation speed of fan, wherein, the temperature in described 9th temperature range is less than or equal to the 8th preset temperature, and the 9th rotation speed of fan is less than or equal to described 8th rotation speed of fan.
Wherein, described first preset temperature is 20 DEG C, described second preset temperature is 15 DEG C, described 3rd preset temperature is 10 DEG C, described 4th preset temperature is 5 DEG C, and described 5th preset temperature is 0 DEG C, and described 6th preset temperature is-5 DEG C, described 7th preset temperature is-10 DEG C, and described 8th preset temperature is-15 DEG C.
Further, according to one embodiment of present invention, the cryogenic refrigeration control method of described air-conditioner, also comprises: the condenser middle portion temperature detecting described air-conditioner; If described condenser middle portion temperature is less than default closing temperature, controls described outdoor fan and shut down; If described condenser middle portion temperature is greater than to preset restart temperature, controls described outdoor fan and restart running, wherein, described presetting is restarted temperature and is greater than described default closing temperature.
According to embodiments of the invention, described outdoor fan is DC fan.
For achieving the above object, the present invention on the other hand embodiment proposes a kind of low-temperature refrigeration control device of air-conditioner, comprising: the first temperature detector, for detecting current outdoor environment temperature; Controller, for judging the temperature range belonging to current outdoor environment temperature, and control air-conditioner run in a chiller mode and the outdoor fan controlling described air-conditioner according to rotation speed of fan running corresponding to the temperature range belonging to described current outdoor environment temperature, wherein, outdoor environment temperature is divided into multiple temperature range, and the corresponding rotation speed of fan of each described temperature range.
According to the low-temperature refrigeration control device that the embodiment of the present invention proposes, current outdoor environment temperature is detected by the first temperature detector, controller judges the temperature range belonging to current outdoor environment temperature, and control air-conditioner run in a chiller mode and control outdoor fan according to the temperature range belonging to current outdoor environment temperature corresponding rotation speed of fan running, thus, user's refrigeration demand at low ambient temperatures can be met, air-conditioner such as can be made still can normally to freeze between-15 DEG C to 20 DEG C, and refrigerating capacity 100% can be met export demand.
According to a specific embodiment of the present invention, when described current outdoor environment temperature belongs to first temperature range, described controller controls described outdoor fan and operates with the first rotation speed of fan, and wherein, the temperature in described first temperature range is greater than the first preset temperature; When described current outdoor environment temperature belongs to the i-th+1 temperature range, described controller controls described outdoor fan and operates with the i-th+1 rotation speed of fan, and wherein, the temperature in described the i-th+1 temperature range is greater than the i-th+1 preset temperature and is less than or equal to the i-th preset temperature, i-th+1 rotation speed of fan is less than or equal to described i-th rotation speed of fan, i=1,2,3,4,5,6,7;
When described current outdoor environment temperature belongs to the 9th temperature range, described controller controls described outdoor fan and operates with the 9th rotation speed of fan, wherein, the temperature in described 9th temperature range is less than or equal to the 8th preset temperature, and the 9th rotation speed of fan is less than or equal to described 8th rotation speed of fan.
Wherein, described first preset temperature is 20 DEG C, described second preset temperature is 15 DEG C, described 3rd preset temperature is 10 DEG C, described 4th preset temperature is 5 DEG C, and described 5th preset temperature is 0 DEG C, and described 6th preset temperature is-5 DEG C, described 7th preset temperature is-10 DEG C, and described 8th preset temperature is-15 DEG C.
Further, according to one embodiment of present invention, the low-temperature refrigeration control device of described air-conditioner also comprises: the second temperature detector, for detecting the condenser middle portion temperature of described air-conditioner; Wherein, if described condenser middle portion temperature is less than default closing temperature, described controller controls described outdoor fan and shuts down, if described condenser middle portion temperature is greater than to preset restart temperature, described controller controls described outdoor fan and restarts running, and described presetting is restarted temperature and be greater than described default closing temperature.
According to embodiments of the invention, described outdoor fan is DC fan.
For achieving the above object, another aspect of the invention embodiment proposes a kind of air-conditioner, comprises the low-temperature refrigeration control device of described air-conditioner.
According to the air-conditioner that the embodiment of the present invention proposes, user's refrigeration demand at low ambient temperatures can be met, such as, air-conditioner can be made still can normally to freeze between-15 DEG C to 20 DEG C, and refrigerating capacity 100% can be met export demand.
Accompanying drawing explanation
Fig. 1 is the flow chart of the cryogenic refrigeration control method of air-conditioner according to the embodiment of the present invention;
Fig. 2 is the corresponding relation schematic diagram of temperature range and rotation speed of fan in the cryogenic refrigeration control method according to the air-conditioner of the present invention's specific embodiment;
Fig. 3 is the flow chart of the cryogenic refrigeration control method of air-conditioner according to an embodiment of the invention;
Fig. 4 is the corresponding relation schematic diagram of condenser middle portion temperature and rotation speed of fan in the cryogenic refrigeration control method according to the air-conditioner of the present invention's specific embodiment;
Fig. 5 is the block diagram of the low-temperature refrigeration control device of air-conditioner according to the embodiment of the present invention; And
Fig. 6 is the block diagram of the low-temperature refrigeration control device of air-conditioner according to an embodiment of the invention.
Detailed description of the invention
Be described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has element that is identical or similar functions from start to finish.Be exemplary below by the embodiment be described with reference to the drawings, be intended to for explaining the present invention, and can not limitation of the present invention be interpreted as.
Below with reference to the accompanying drawings air-conditioner and the cryogenic refrigeration control method of air-conditioner and low-temperature refrigeration control device that the embodiment of the present invention proposes are described.
Fig. 1 is the flow chart of the cryogenic refrigeration control method of air-conditioner according to the embodiment of the present invention.As shown in Figure 1, the cryogenic refrigeration control method of this air-conditioner, comprises the following steps:
S1: detect current outdoor environment temperature.
Wherein, current outdoor environment temperature is detected by the first temperature detector.
According to a concrete example of the present invention, current outdoor environment temperature can lower than 0 DEG C.
S2: judge the temperature range belonging to current outdoor environment temperature, wherein, is divided into multiple temperature range by outdoor environment temperature, and the corresponding rotation speed of fan of each temperature range.
S3: control air-conditioner runs with refrigeration module and the outdoor fan of control air-conditioner operates according to the rotation speed of fan that the temperature range belonging to current outdoor environment temperature is corresponding.
That is, according to the scope of application of outdoor environment temperature, outdoor environment temperature can be divided into multiple temperature range, and each temperature range can preset corresponding rotation speed of fan according to the actual requirements.Be understandable that, the corresponding relation between temperature range and rotation speed of fan can be stored in the controller of air-conditioner.
Like this, after acquisition current outdoor environment temperature, by contrasting the relation table of temperature range and the rotation speed of fan prestored, the rotation speed of fan of correspondence can be obtained, and control outdoor fan and operate according to the rotation speed of fan of correspondence.
It should be noted that, along with the continuous decline of outdoor environment temperature, the condensing pressure of condenser declines, and heat exchange efficiency uprises, the air quantity slump in demand of outdoor fan, needing the rotating speed by reducing outdoor fan, reaching maximum output to make the refrigerating capacity of air-conditioner.Thus, outdoor environment temperature is lower, and the rotating speed of outdoor fan is lower.
Wherein, according to a specific embodiment of the present invention, outdoor fan can be DC fan.
According to a specific embodiment of the present invention, as shown in Figure 2, control the outdoor fan of air-conditioner according to rotation speed of fan running corresponding to the temperature range belonging to current outdoor environment temperature and step S3, specifically comprise: when current outdoor environment temperature belongs to first temperature range, control outdoor fan to operate with the first rotation speed of fan, wherein, the temperature in first temperature range is greater than the first preset temperature; When current outdoor environment temperature belongs to the i-th+1 temperature range, control outdoor fan to operate with the i-th+1 rotation speed of fan, wherein, the temperature in the i-th+1 temperature range is greater than the i-th+1 preset temperature and is less than or equal to the i-th preset temperature, i-th+1 rotation speed of fan is less than or equal to the i-th rotation speed of fan, i=1,2,3,4,5,6,7; When current outdoor environment temperature belongs to the 9th temperature range, control outdoor fan and operate with the 9th rotation speed of fan, wherein, the temperature in the 9th temperature range is less than or equal to the 8th preset temperature, and the 9th rotation speed of fan is less than or equal to the 8th rotation speed of fan.
Wherein, the first preset temperature is 20 DEG C, and the second preset temperature is 15 DEG C, and the 3rd preset temperature is 10 DEG C, and the 4th preset temperature is 5 DEG C, and the 5th preset temperature is 0 DEG C, and the 6th preset temperature is-5 DEG C, and the 7th preset temperature is-10 DEG C, and the 8th preset temperature is-15 DEG C.
Specifically, as shown in Figure 2, if current outdoor environment temperature is greater than 20 DEG C, then judge that current outdoor environment temperature belongs to first temperature range, control outdoor fan and operate with the first rotation speed of fan SPEED1; Current outdoor environment temperature is greater than 15 DEG C and is less than or equal to 20 DEG C, then judge that current outdoor environment temperature belongs to second temperature range, controls outdoor fan and operates with the second rotation speed of fan SPEED2; Current outdoor environment temperature is greater than 10 DEG C and is less than or equal to 15 DEG C, then judge that current outdoor environment temperature belongs to the 3rd temperature range, controls outdoor fan and operates with the 3rd rotation speed of fan SPEED3; Current outdoor environment temperature is greater than 5 DEG C and is less than or equal to 10 DEG C, then judge that current outdoor environment temperature belongs to the 4th temperature range, controls outdoor fan and operates with four fan device rotating speed SPEED4; Current outdoor environment temperature is greater than 0 DEG C and is less than or equal to 5 DEG C, then judge that current outdoor environment temperature belongs to the 5th temperature range, controls outdoor fan and operates with the 5th rotation speed of fan SPEED5; Current outdoor environment temperature is greater than-5 DEG C and is less than or equal to 0 DEG C, then judge that current outdoor environment temperature belongs to the 6th temperature range, controls outdoor fan and operates with the 6th rotation speed of fan SPEED6; Current outdoor environment temperature is greater than-10 DEG C and is less than or equal to-5 DEG C, then judge that current outdoor environment temperature belongs to the 7th temperature range, controls outdoor fan and operates with the 7th rotation speed of fan SPEED7; Current outdoor environment temperature is greater than-15 DEG C and is less than or equal to-10 DEG C, then judge that current outdoor environment temperature belongs to the 8th temperature range, controls outdoor fan and operates with the 8th rotation speed of fan SPEED8; Current outdoor environment temperature is less than or equal to-15 DEG C, then judge that current outdoor environment temperature belongs to the 9th temperature range, controls outdoor fan and operates with the 9th rotation speed of fan SPEED9.Wherein, SPEED1 >=SPEED2 >=SPEED3 >=SPEED4 >=SPEED5 >=SPEED6 >=SPEED7 >=SPEED8 >=SPEED9.
In addition, in the predeterminable return difference threshold value of each temperature range, to avoid the rotating speed frequently adjusting outdoor fan.As the example of Fig. 2, return difference threshold value can be 1 DEG C, for-5 DEG C, when current outdoor environment temperature from 0 DEG C drop to be less than-5 DEG C time, outdoor fan operates with the 7th rotation speed of fan SPEED7, afterwards, if outdoor environment temperature raises, then need to be elevated to-4 DEG C, outdoor fan just operates with the 6th rotation speed of fan SPEED6, and being elevated to-5 DEG C, outdoor fan just still operates with the 7th rotation speed of fan SPEED7.
Further, according to one embodiment of present invention, as shown in Figure 3, the cryogenic refrigeration control method of air-conditioner also comprises:
S10: the condenser middle portion temperature detecting air-conditioner.
Wherein, the condenser middle portion temperature of air-conditioner is detected by the second temperature detector.Second temperature detector can be arranged in the middle part of condenser.
S20: if condenser middle portion temperature is less than default closing temperature, controls outdoor fan and shuts down.
S30: if condenser middle portion temperature is greater than to preset restart temperature, controls outdoor fan and restart running, wherein, preset and restart temperature and be greater than default closing temperature.
It should be noted that, even if each temperature range all sets a rotation speed of fan, but still there is possibility bigger than normal in the air quantity of outdoor fan, such as when outdoor environment equals-10 DEG C, the 8th corresponding rotation speed of fan SPEED8 is bigger than normal, and the air quantity of outdoor fan is bigger than normal, and when outdoor environment equals 10 DEG C, corresponding four fan device rotating speed SPEED4 is suitable, and the air quantity of outdoor fan can not be bigger than normal.When the air quantity of outdoor fan is bigger than normal, the condensing pressure of condenser will sharply decline, when condensing pressure is reduced to equal with evaporating pressure, refrigeration system can not form pressure reduction, refrigerating capacity can obviously decay, in order to sort this problem out, the rotation speed of fan arranging outdoor fan associates with condenser middle portion temperature, can control according to condenser middle portion temperature to outdoor fan.
Be understandable that, the air quantity of outdoor fan suitable namely bigger than normal time, condenser middle portion temperature can not be less than default closing temperature, and outdoor fan will run well, the rotation speed of fan of outdoor fan and condenser middle portion temperature onrelevant.
Specifically, as shown in Figure 4, when the air quantity of outdoor fan is bigger than normal, detect condenser middle portion temperature, when condenser middle portion temperature Tcm is lower than default closing temperature Tcm-off, the rotation speed of fan of outdoor fan is run from preset rotation speed and becomes 0, outdoor fan shuts down, condenser will by heat transfer free convection, and in this case, condenser middle portion temperature and condensing pressure are by rebound significantly; If condenser middle portion temperature Tcm gos up to higher than presetting restart temperature Tcm-on, then condensing pressure is higher than system matches optimum value, pressure continues to rise and will reduce refrigerating capacity, so, can reach and preset when restarting temperature Tcm-on by portion temperature Tcm within the condenser, restart outdoor fan, outdoor fan can remain in operation according to the rotation speed of fan before out of service.
In sum, according to the cryogenic refrigeration control method that the embodiment of the present invention proposes, detect current outdoor environment temperature, and judge the temperature range belonging to current outdoor environment temperature, and control air-conditioner and run in a chiller mode and controls outdoor fan and operate according to rotation speed of fan corresponding to the temperature range belonging to current outdoor environment temperature, thus, user's refrigeration demand at low ambient temperatures can be met, air-conditioner such as can be made still can normally to freeze between-15 DEG C to 20 DEG C, and refrigerating capacity 100% can be met export demand.
In order to realize above-described embodiment, the invention allows for a kind of low-temperature refrigeration control device of air-conditioner.
Fig. 5 is the block diagram of the low-temperature refrigeration control device of air-conditioner according to the embodiment of the present invention.As shown in Figure 5, the low-temperature refrigeration control device of this air-conditioner comprises the first temperature detector 10 and controller 20.
Wherein, the first temperature detector 10 is for detecting current outdoor environment temperature; Controller 20 is for judging the temperature range belonging to current outdoor environment temperature, and the outdoor fan controlling air-conditioner operates according to the rotation speed of fan that the temperature range belonging to current outdoor environment temperature is corresponding, wherein, outdoor environment temperature is divided into multiple temperature range, and the corresponding rotation speed of fan of each temperature range.
It should be noted that, according to the scope of application of outdoor environment temperature, outdoor environment temperature can be divided into multiple temperature range, and each temperature range can preset corresponding rotation speed of fan according to the actual requirements.Be understandable that, the corresponding relation between temperature range and rotation speed of fan can be stored in controller 20.
Like this, controller 20, after acquisition current outdoor environment temperature, by contrasting the relation table of temperature range and the rotation speed of fan prestored, can obtain the rotation speed of fan of correspondence, and controls outdoor fan and operate according to the rotation speed of fan of correspondence.
It should be noted that, along with the continuous decline of outdoor environment temperature, the condensing pressure of condenser declines, and heat exchange efficiency uprises, the air quantity slump in demand of outdoor fan, needing the rotating speed by reducing outdoor fan, reaching maximum output to make the refrigerating capacity of air-conditioner.Thus, outdoor environment temperature is lower, and the rotating speed of outdoor fan is lower.
Wherein, according to a specific embodiment of the present invention, outdoor fan can be DC fan.
According to a specific embodiment of the present invention, when current outdoor environment temperature belongs to first temperature range, controller 20 controls outdoor fan and operates with the first rotation speed of fan, and wherein, the temperature in first temperature range is greater than the first preset temperature; When current outdoor environment temperature belongs to the i-th+1 temperature range, controller 20 controls outdoor fan and operates with the i-th+1 rotation speed of fan, and wherein, the temperature in the i-th+1 temperature range is greater than the i-th+1 preset temperature and is less than or equal to the i-th preset temperature, i-th+1 rotation speed of fan is less than or equal to the i-th rotation speed of fan, i=1,2,3,4,5,6,7; When current outdoor environment temperature belongs to the 9th temperature range, controller 20 controls outdoor fan and operates with the 9th rotation speed of fan, wherein, the temperature in the 9th temperature range is less than or equal to the 8th preset temperature, and the 9th rotation speed of fan is less than or equal to the 8th rotation speed of fan.
Wherein, the first preset temperature is 20 DEG C, and the second preset temperature is 15 DEG C, and the 3rd preset temperature is 10 DEG C, and the 4th preset temperature is 5 DEG C, and the 5th preset temperature is 0 DEG C, and the 6th preset temperature is-5 DEG C, and the 7th preset temperature is-10 DEG C, and the 8th preset temperature is-15 DEG C.
Specifically, as shown in Figure 2, if current outdoor environment temperature is greater than 20 DEG C, then controller 20 judges that current outdoor environment temperature belongs to first temperature range, and controls outdoor fan and operate with the first rotation speed of fan SPEED1; Current outdoor environment temperature is greater than 15 DEG C and is less than or equal to 20 DEG C, then controller 20 judges that current outdoor environment temperature belongs to second temperature range, and controls outdoor fan and operate with the second rotation speed of fan SPEED2; Current outdoor environment temperature is greater than 10 DEG C and is less than or equal to 15 DEG C, then controller 20 judges that current outdoor environment temperature belongs to the 3rd temperature range, and controls outdoor fan and operate with the 3rd rotation speed of fan SPEED3; Current outdoor environment temperature is greater than 5 DEG C and is less than or equal to 10 DEG C, then controller 20 judges that current outdoor environment temperature belongs to the 4th temperature range, and controls outdoor fan and operate with four fan device rotating speed SPEED4; Current outdoor environment temperature is greater than 0 DEG C and is less than or equal to 5 DEG C, then controller 20 judges that current outdoor environment temperature belongs to the 5th temperature range, and controls outdoor fan and operate with the 5th rotation speed of fan SPEED5; Current outdoor environment temperature is greater than-5 DEG C and is less than or equal to 0 DEG C, then controller 20 judges that current outdoor environment temperature belongs to the 6th temperature range, and controls outdoor fan and operate with the 6th rotation speed of fan SPEED6; Current outdoor environment temperature is greater than-10 DEG C and is less than or equal to-5 DEG C, then controller 20 judges that current outdoor environment temperature belongs to the 7th temperature range, and controls outdoor fan and operate with the 7th rotation speed of fan SPEED7; Current outdoor environment temperature is greater than-15 DEG C and is less than or equal to-10 DEG C, then controller 20 judges that current outdoor environment temperature belongs to the 8th temperature range, and controls outdoor fan and operate with the 8th rotation speed of fan SPEED8; Current outdoor environment temperature is less than or equal to-15 DEG C, then controller 20 judges that current outdoor environment temperature belongs to the 9th temperature range, and controls outdoor fan and operate with the 9th rotation speed of fan SPEED9.Wherein, SPEED1 >=SPEED2 >=SPEED3 >=SPEED4 >=SPEED5 >=SPEED6 >=SPEED7 >=SPEED8 >=SPEED9.
In addition, in the predeterminable return difference threshold value of each temperature range, to avoid the rotating speed frequently adjusting outdoor fan.As the example of Fig. 2, return difference threshold value can be 1 DEG C, for-5 DEG C, when current outdoor environment temperature from 0 DEG C drop to be less than-5 DEG C time, outdoor fan operates with the 7th rotation speed of fan SPEED7, afterwards, if outdoor environment temperature raises, then need to be elevated to-4 DEG C, outdoor fan just operates with the 6th rotation speed of fan SPEED6, and being elevated to-5 DEG C, outdoor fan just still operates with the 7th rotation speed of fan SPEED7.
Further, according to one embodiment of present invention, as shown in Figure 6, the low-temperature refrigeration control device of air-conditioner also comprises: the second temperature detector 30.Second temperature detector 30 is for detecting the condenser middle portion temperature of air-conditioner; Wherein, if condenser middle portion temperature is less than default closing temperature, controller 20 controls outdoor fan and shuts down, if condenser middle portion temperature is greater than to preset restart temperature, controller 20 controls outdoor fan and restarts running, presets and restarts temperature and be greater than default closing temperature.
It should be noted that, even if each temperature range all sets a rotation speed of fan, but still there is possibility bigger than normal in the air quantity of outdoor fan, such as when outdoor environment equals-10 DEG C, the 8th corresponding rotation speed of fan SPEED8 is bigger than normal, and the air quantity of outdoor fan is bigger than normal, and when outdoor environment equals 10 DEG C, corresponding four fan device rotating speed SPEED4 is suitable, and the air quantity of outdoor fan can not be bigger than normal.When the air quantity of outdoor fan is bigger than normal, the condensing pressure of condenser will sharply decline, when condensing pressure is reduced to equal with evaporating pressure, refrigeration system can not form pressure reduction, refrigerating capacity can obviously decay, in order to sort this problem out, the rotation speed of fan arranging outdoor fan associates with condenser middle portion temperature, can control according to condenser middle portion temperature to outdoor fan.
Be understandable that, the air quantity of outdoor fan suitable namely bigger than normal time, condenser middle portion temperature can not be less than default closing temperature, and outdoor fan will run well, the rotation speed of fan of outdoor fan and condenser middle portion temperature onrelevant.
Specifically, as shown in Figure 4, when the air quantity of outdoor fan is bigger than normal, controller 20 controls the second temperature detector 30 and detects condenser middle portion temperature, and when condenser middle portion temperature Tcm is lower than default closing temperature Tcm-off, the rotation speed of fan of outdoor fan is run from preset rotation speed and becomes 0, outdoor fan shuts down, condenser will by heat transfer free convection, and in this case, condenser middle portion temperature and condensing pressure are by rebound significantly; If condenser middle portion temperature Tcm gos up to higher than presetting restart temperature Tcm-on, then condensing pressure is higher than system matches optimum value, pressure continues to rise and will reduce refrigerating capacity, so, can reach and preset when restarting temperature Tcm-on by portion temperature Tcm within the condenser, restart outdoor fan, outdoor fan can remain in operation according to the rotation speed of fan before out of service.
In sum, according to the low-temperature refrigeration control device that the embodiment of the present invention proposes, current outdoor environment temperature is detected by the first temperature detector, controller judges the temperature range belonging to current outdoor environment temperature, and control air-conditioner run in a chiller mode and control outdoor fan according to the temperature range belonging to current outdoor environment temperature corresponding rotation speed of fan running, thus, user's refrigeration demand at low ambient temperatures can be met, air-conditioner such as can be made still can normally to freeze between-15 DEG C to 20 DEG C, and refrigerating capacity 100% can be met export demand.
Finally, the embodiment of the present invention proposes a kind of air-conditioner, comprises the low-temperature refrigeration control device of the air-conditioner of above-described embodiment.
According to the air-conditioner that the embodiment of the present invention proposes, user's refrigeration demand at low ambient temperatures can be met, such as, air-conditioner can be made still can normally to freeze between-15 DEG C to 20 DEG C, and refrigerating capacity 100% can be met export demand.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise at least one this feature.In describing the invention, the implication of " multiple " is at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements, unless otherwise clear and definite restriction.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this description, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term not must for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this description or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (11)
1. a cryogenic refrigeration control method for air-conditioner, is characterized in that, comprise the following steps:
Detect current outdoor environment temperature;
Judge the temperature range belonging to current outdoor environment temperature, wherein, outdoor environment temperature is divided into multiple temperature range, and the corresponding rotation speed of fan of each described temperature range; And
Control described air-conditioner run in a chiller mode and the outdoor fan controlling described air-conditioner according to rotation speed of fan running corresponding to the temperature range belonging to described current outdoor environment temperature.
2. the cryogenic refrigeration control method of air-conditioner as claimed in claim 1, is characterized in that, the outdoor fan controlling described air-conditioner operates according to the rotation speed of fan that the temperature range belonging to described current outdoor environment temperature is corresponding, specifically comprises:
When described current outdoor environment temperature belongs to first temperature range, control described outdoor fan and operate with the first rotation speed of fan, wherein, the temperature in described first temperature range is greater than the first preset temperature;
When described current outdoor environment temperature belongs to the i-th+1 temperature range, control described outdoor fan to operate with the i-th+1 rotation speed of fan, wherein, the temperature in described the i-th+1 temperature range is greater than the i-th+1 preset temperature and is less than or equal to the i-th preset temperature, i-th+1 rotation speed of fan is less than or equal to described i-th rotation speed of fan, i=1,2,3,4,5,6,7;
When described current outdoor environment temperature belongs to the 9th temperature range, control described outdoor fan to operate with the 9th rotation speed of fan, wherein, the temperature in described 9th temperature range is less than or equal to the 8th preset temperature, and the 9th rotation speed of fan is less than or equal to described 8th rotation speed of fan.
3. the cryogenic refrigeration control method of air-conditioner as claimed in claim 2, it is characterized in that, described first preset temperature is 20 DEG C, described second preset temperature is 15 DEG C, and described 3rd preset temperature is 10 DEG C, and described 4th preset temperature is 5 DEG C, described 5th preset temperature is 0 DEG C, described 6th preset temperature is-5 DEG C, and described 7th preset temperature is-10 DEG C, and described 8th preset temperature is-15 DEG C.
4. the cryogenic refrigeration control method of air-conditioner as claimed in claim 1, is characterized in that, also comprise:
Detect the condenser middle portion temperature of described air-conditioner;
If described condenser middle portion temperature is less than default closing temperature, controls described outdoor fan and shut down;
If described condenser middle portion temperature is greater than to preset restart temperature, controls described outdoor fan and restart running, wherein, described presetting is restarted temperature and is greater than described default closing temperature.
5. the cryogenic refrigeration control method of the air-conditioner according to any one of claim 1-4, is characterized in that, described outdoor fan is DC fan.
6. a low-temperature refrigeration control device for air-conditioner, is characterized in that, comprising:
First temperature detector, for detecting current outdoor environment temperature; And
Controller, for judging the temperature range belonging to current outdoor environment temperature, and control described air-conditioner run in a chiller mode and the outdoor fan controlling described air-conditioner according to rotation speed of fan running corresponding to the temperature range belonging to described current outdoor environment temperature, wherein, outdoor environment temperature is divided into multiple temperature range, and the corresponding rotation speed of fan of each described temperature range.
7. the low-temperature refrigeration control device of air-conditioner as claimed in claim 6, is characterized in that,
When described current outdoor environment temperature belongs to first temperature range, described controller controls described outdoor fan and operates with the first rotation speed of fan, and wherein, the temperature in described first temperature range is greater than the first preset temperature;
When described current outdoor environment temperature belongs to the i-th+1 temperature range, described controller controls described outdoor fan and operates with the i-th+1 rotation speed of fan, and wherein, the temperature in described the i-th+1 temperature range is greater than the i-th+1 preset temperature and is less than or equal to the i-th preset temperature, i-th+1 rotation speed of fan is less than or equal to described i-th rotation speed of fan, i=1,2,3,4,5,6,7;
When described current outdoor environment temperature belongs to the 9th temperature range, described controller controls described outdoor fan and operates with the 9th rotation speed of fan, wherein, the temperature in described 9th temperature range is less than or equal to the 8th preset temperature, and the 9th rotation speed of fan is less than or equal to described 8th rotation speed of fan.
8. the low-temperature refrigeration control device of air-conditioner as claimed in claim 7, it is characterized in that, described first preset temperature is 20 DEG C, described second preset temperature is 15 DEG C, and described 3rd preset temperature is 10 DEG C, and described 4th preset temperature is 5 DEG C, described 5th preset temperature is 0 DEG C, described 6th preset temperature is-5 DEG C, and described 7th preset temperature is-10 DEG C, and described 8th preset temperature is-15 DEG C.
9. the low-temperature refrigeration control device of air-conditioner as claimed in claim 6, is characterized in that, also comprise:
Second temperature detector, for detecting the condenser middle portion temperature of described air-conditioner;
Wherein, if described condenser middle portion temperature is less than default closing temperature, described controller controls described outdoor fan and shuts down, if described condenser middle portion temperature is greater than to preset restart temperature, described controller controls described outdoor fan and restarts running, and described presetting is restarted temperature and be greater than described default closing temperature.
10. the low-temperature refrigeration control device of the air-conditioner according to any one of claim 6-9, is characterized in that, described outdoor fan is DC fan.
11. 1 kinds of air-conditioners, is characterized in that, comprise the low-temperature refrigeration control device of the air-conditioner according to any one of claim 6-10.
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