CN105509242A - Refrigerant addition control method for air conditioner - Google Patents
Refrigerant addition control method for air conditioner Download PDFInfo
- Publication number
- CN105509242A CN105509242A CN201510981203.8A CN201510981203A CN105509242A CN 105509242 A CN105509242 A CN 105509242A CN 201510981203 A CN201510981203 A CN 201510981203A CN 105509242 A CN105509242 A CN 105509242A
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- Prior art keywords
- refrigerant
- air
- conditioner
- environment temperature
- temperature
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Atmospheric Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a refrigerant addition control method for an air conditioner. The air conditioner is provided with an external environment thermometer bulb, an internal environment thermometer bulb, an exhaust thermometer bulb and a stop valve for starting or stopping refrigerant addition. The method comprises the steps of 1, presetting the external environment temperature T1, the internal environment temperature T2 and the target exhaust temperature T3; 2, starting the air conditioner and entering the refrigerant addition mode; 3, detecting the current external environment temperature T1, the current internal environment temperature T2 and the current target exhaust temperature T3 and comparing the current external environment temperature T1, the current internal environment temperature T2 and the current target exhaust temperature T3 with the preset corresponding values; 4, opening the stop valve for adding refrigerants when the comparison result shows that the refrigerants are insufficient, repeating the detection process and the comparison process of the step 3 until the comparison result shows that the refrigerants are appropriate and then executing the step 5; 5, closing the stop valve and stopping the refrigerant addition mode. According to the invention, when the refrigerants are insufficient, the refrigerants are continuously added, the amount of the refrigerants is detected and judged in real time, the stop valve is closed when the refrigerants are appropriate, refrigerant addition is timely and accurate, and therefore a compressor can be operated stably.
Description
Technical field
The present invention relates to air-conditioner technical field, be specifically related to a kind of refrigerant super-addition control method for air-conditioner.
Background technology
At present, air-conditioner set often can run into secondary refrigerant leakage, carry out the situation such as lengthening to refrigerant pipe in running, all needs in these cases to add refrigerant to guarantee the stable operation of unit to air-conditioner set.But, under special circumstances, the project installation of part air-conditioner set is lack of standardization, or mounting condition is comparatively severe, the not portable electronic scale when carrying out refrigerant super-addition operation, cannot rational judgment refrigerant super-addition amount whether suitable, mostly just rely on to detect valve pressure or stick with paste according to maintenance master worker Empirical Mode to judge, refrigerant super-addition amount will be made so often to be forbidden, easily occur that refrigerant super-addition is not enough or add excessive situation, thus cause air-conditioner compressor in actual motion lack fluorine for a long time or cross fluorine operation, affect the compressor life-span.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of when judging cold medium shortage in air-conditioner, accurately controls refrigerant super-addition amount to ensure the control method of compressor stable operation.
Technical scheme of the present invention is, a kind of refrigerant super-addition control method for air-conditioner is provided, described air-conditioner is provided with the external environment temperature-sensitive bag for detecting outdoor environment temperature, for detect indoor environment temperature environment temperature-sensitive bag, for detecting the exhaust temperature-sensitive bag of compressor exhaust temperature, and for controlling the stop valve of start and stop refrigerant super-addition, said method comprising the steps of:
S1: presetting external environment temperature T
outward, environment temperature T
in, and at T
outwardand T
inunder compressor is reliably operated target exhaust temperature T
row;
S2: start air-conditioner, enter refrigerant super-addition mode;
S3: detect Current outer loop border temperature T1, current environment temperature T2 and current exhaust gas temperature T3, and compare with presetting analog value;
S4: when comparative result is cold medium shortage, opens stop valve and carries out refrigerant super-addition, and continues to repeat the detection of step S3 and comparison procedure, until comparative result when to be refrigerant suitable, enters step S5;
S5: close stop valve, terminates refrigerant super-addition mode.
Preferably, in described step S4, before opening stop valve comparative result be refrigerant suitable time, directly exit refrigerant super-addition mode.
Preferably, in described step S4, before opening stop valve comparative result be refrigerant excessive time, exit refrigerant super-addition mode.
Further, capillary of connecting between the entrance of the gas-liquid separator of stop valve and air-conditioner, controls refrigerant super-addition speed by described capillary.
Further, in described step S4, when T1, T2 fall into T simultaneously
outwardand T
inscope, and T3 > T
rowtime, judge that comparative result is as cold medium shortage.
Further, in described step S4, when T1, T2 fall into T simultaneously
outwardand T
inscope, and T
row-1≤T3≤T
rowtime, judge that comparative result is suitable as refrigerant.
Further, in described step S4, when T1, T2 fall into T simultaneously
outwardand T
inscope, and T3≤T
rowwhen-1, judge that comparative result is excessive as refrigerant.
Preferably, after judging that comparative result is suitable as refrigerant, control air-conditioner and export the first alarm song, and control air-conditioner and shut down after Preset Time.
Preferably, after judging that comparative result is excessive as refrigerant, control air-conditioner and export the second alarm song, and control air-conditioner and directly shut down.
The beneficial effect of technical solution of the present invention is: by presetting external environment temperature T
outward, environment temperature T
inand target exhaust temperature T
rowmapping relations, define when coolant quantity is suitable, with external environment temperature T
outward, environment temperature T
incorresponding target exhaust temperature T
rowdesired temperature; After entering refrigerant super-addition mode, by detecting Current outer loop border temperature and environment temperature and current exhaust gas temperature, and compare with presetting each value, judge that whether coolant quantity is suitable according to current exhaust gas temperature relative to the difference of predetermined value, when cold medium shortage, continue to add refrigerant and detect in real time and judge coolant quantity state, close stop valve when delivery temperature reaches desired value in time and complete refrigerant super-addition operation, whole refrigerant super-addition control procedure promptly and accurately, has ensured the stable operation of compressor.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structure chart of a kind of air-conditioner that the embodiment of the present invention provides;
Fig. 2 is a kind of refrigerant super-addition control method flow chart for air-conditioner that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
Refer to Fig. 1, shown in Fig. 2, the invention provides a kind of refrigerant super-addition control method for air-conditioner, this air-conditioner is provided with the external environment temperature-sensitive bag for detecting outdoor environment temperature, for detecting the environment temperature-sensitive bag of indoor environment temperature, for detecting the exhaust temperature-sensitive bag of compressor exhaust temperature, and for controlling the stop valve 1 of start and stop refrigerant super-addition, above-mentioned multiple temperature-sensitive Bao Wei is indicated in the drawings, as shown in Figure 1, common compressor 2 is also comprised in this air-conditioner, four-way change-over valve 3, condenser 4 and orifice union 5, its structure and operation principle are known for those skilled in the art, do not repeat them here.In the present embodiment, refrigerant super-addition control method comprises the following steps:
S1: presetting external environment temperature T
outward, environment temperature T
in, and at T
outwardand T
inunder compressor is reliably operated target exhaust temperature T
row.
Wherein, coolant quantity in air-conditioner unit directly has influence on delivery temperature during compressor operating, and environment temperature during air-conditioner operation, external environment temperature is all closely bound up with the delivery temperature of compressor, therefore, when in air-conditioner, coolant quantity is suitable, under given environment temperature range and external environment temperature range condition, there is a stable target exhaust temperature value in the compressor run, when the coolant quantity in air-conditioner occurs not enough because of unexpected situation, under the condition that the outdoor temperature environment facies with setting are same, the real time exhaust gas temperature of compressor should be greater than target exhaust temperature, otherwise, when refrigerant is excessive, the real time exhaust gas temperature of compressor should be less than target exhaust temperature.
S2: start air-conditioner, enter refrigerant super-addition mode.
In the present embodiment, the controller of air-conditioner arranging refrigerant super-addition mode, the beginning of refrigerant super-addition operation, to stop by controlling to open, close stop valve to realize.
S3: detect Current outer loop border temperature T1, current environment temperature T2 and current exhaust gas temperature T3, and compare with presetting analog value.
Particularly, start air-conditioner, control to start temperature detection after air-conditioner runs a period of time system stability, this running time can be 5 ~ 10 minutes, after system stable operation, detected the current exhaust gas temperature T3 obtaining indoor and outdoor surroundings temperature T2, T1 and compressor respectively by each temperature-sensitive bag, after obtaining each temperature parameter value, each parameter value and preset value compare by controller, search the T corresponding with T1, T2
outwardand T
intarget exhaust temperature T under condition
row, as T3 > T
rowtime, can cold medium shortage be judged.
S4: when comparative result is cold medium shortage, opens stop valve and carries out refrigerant super-addition, and continues to repeat the detection of step S3 and comparison procedure, until comparative result when to be refrigerant suitable, enters step S5.
After judging cold medium shortage by above-mentioned steps, opening stop valve adds refrigerant in refrigerant pipe, and while adding refrigerant, periodically real time steps S3 detects each temperature parameter in real time and judges coolant quantity real-time status.
S5: close stop valve, terminates refrigerant super-addition mode.When coolant quantity is appended to desired value, closes stop valve and stop continuing to add, arrange with Time Controller and exit refrigerant super-addition mode.
Preferably, in above-mentioned steps S4, before opening stop valve comparative result be refrigerant suitable time, directly exit refrigerant super-addition mode.Wherein, presetting external environment temperature T
outwardwith environment temperature T
incan be the silicon carbide in a segment limit respectively, judge that the situation that refrigerant is suitable is then when meeting interval external environment temperature and interval environment temperature at the same time, current compressor delivery temperature reaches setting target exhaust temperature value, as shown in the table, be wherein a kind of exemplary map relation table:
As shown above, the first horizontal bar is presetting external environment temperature range, and the first perpendicular hurdle is presetting environment temperature range, and mid portion is the target exhaust temperature value of corresponding each interval internal and external environment temperature.
Further, in above-mentioned steps S4, when T1, T2 fall into T simultaneously
outwardand T
inscope, and T3 > T
rowtime, judge that comparative result is as cold medium shortage.As shown above, assuming that Current outer loop border temperature T1 is 20 DEG C, current environment temperature T2 is 18 DEG C, and when current compressor delivery temperature T3 is 72 DEG C; T1 falls into the T of 17 ~ 20
outwardtemperature range, T2 falls into the T of 18 ~ 20
intemperature range, now the target exhaust temperature of compressor should be 70 DEG C, compares and learns T3 > T
row, can judge that current coolant quantity is not enough.
Preferably, in above-mentioned steps S4, before opening stop valve comparative result be refrigerant excessive time, exit refrigerant super-addition mode.In the present embodiment, when T1, T2 fall into T simultaneously
outwardand T
inscope, and T3≤T
rowwhen-1, judge that comparative result is excessive as refrigerant.Preferably, after judging that comparative result is excessive as refrigerant, control air-conditioner and export the second alarm song, and control air-conditioner and directly shut down.Can to drain after shutdown part refrigerant, and then to detect unit residue refrigerant situation.
As shown above, assuming that Current outer loop border temperature T1 is 20 DEG C, current environment temperature T2 is 18 DEG C, and when current compressor delivery temperature T3 is 68 DEG C; T1 falls into the T of 17 ~ 20
outwardtemperature range, T2 falls into the T of 18 ~ 20
intemperature range, now the target exhaust temperature of compressor should be 70 DEG C, compares and learns T3 < T
row-1, can judge that current coolant quantity is excessive.The excessive meeting of refrigerant is unfavorable for the normal work of compressor, does not need to carry out refrigerant super-addition, can directly export excessive alarm song, such as, control unit and send buzzing two sound to remind staff's refrigerant excessive, then controls to shut down.
Further, capillary 7 of connecting between the entrance of the gas-liquid separator 6 of stop valve and air-conditioner, controls refrigerant super-addition speed by capillary 7.The arranging of capillary 7 can control refrigerant and be filled with slowly in refrigerant pipe, has enough reactions and processing time, be conducive to accurately controlling refrigerant super-addition amount to each temperature-sensitive bag and controller.
Further, in above-mentioned steps S4, when T1, T2 fall into T simultaneously
outwardand T
inscope, and T
row-1≤T3≤T
rowtime, judge that comparative result is suitable as refrigerant.Preferably, after judging that comparative result is suitable as refrigerant, control air-conditioner and export the first alarm song, and control air-conditioner and shut down after Preset Time.
As shown above, assuming that Current outer loop border temperature T1 is 20 DEG C, current environment temperature T2 is 18 DEG C, and when current compressor delivery temperature T3 is 70 DEG C; T1 falls into the T of 17 ~ 20
outwardtemperature range, T2 falls into the T of 18 ~ 20
intemperature range, now the target exhaust temperature of compressor should be 70 DEG C, compares and learns T
row-1≤T3≤T
row, can judge that current coolant quantity is suitable.Need after refrigerant super-addition to appropriate level to stop in time continuing to add, can be control unit to send buzzing and remind in the present embodiment, shut down after the 5S of countdown simultaneously.
The above is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. the refrigerant super-addition control method for air-conditioner, described air-conditioner is provided with the external environment temperature-sensitive bag for detecting outdoor environment temperature, for detect indoor environment temperature environment temperature-sensitive bag, for detecting the exhaust temperature-sensitive bag of compressor exhaust temperature, and for controlling the stop valve of start and stop refrigerant super-addition, it is characterized in that, said method comprising the steps of:
S1: presetting external environment temperature T
outward, environment temperature T
in, and at T
outwardand T
inunder compressor is reliably operated target exhaust temperature T
row;
S2: start air-conditioner, enter refrigerant super-addition mode;
S3: detect Current outer loop border temperature T1, current environment temperature T2 and current exhaust gas temperature T3, and compare with presetting analog value;
S4: when comparative result is cold medium shortage, opens stop valve and carries out refrigerant super-addition, and continues to repeat the detection of step S3 and comparison procedure, until comparative result when to be refrigerant suitable, enters step S5;
S5: close stop valve, terminates refrigerant super-addition mode.
2. the refrigerant super-addition control method for air-conditioner according to claim 1, is characterized in that, in described step S4, before opening stop valve comparative result be refrigerant suitable time, directly exit refrigerant super-addition mode.
3. the refrigerant super-addition control method for air-conditioner according to claim 1, is characterized in that, in described step S4, before opening stop valve comparative result be refrigerant excessive time, exit refrigerant super-addition mode.
4. the refrigerant super-addition control method for air-conditioner according to claim 1, is characterized in that, capillary of connecting between the entrance of the gas-liquid separator of stop valve and air-conditioner, controls refrigerant super-addition speed by described capillary.
5. the refrigerant super-addition control method for air-conditioner according to claim 1, is characterized in that, in described step S4, when T1, T2 fall into T simultaneously
outwardand T
inscope, and T3 > T
rowtime, judge that comparative result is as cold medium shortage.
6. the refrigerant super-addition control method for air-conditioner according to claim 2, is characterized in that, in described step S4, when T1, T2 fall into T simultaneously
outwardand T
inscope, and T
row-1≤T3≤T
rowtime, judge that comparative result is suitable as refrigerant.
7. the refrigerant super-addition control method for air-conditioner according to claim 3, is characterized in that, in described step S4, when T1, T2 fall into T simultaneously
outwardand T
inscope, and T3≤T
rowwhen-1, judge that comparative result is excessive as refrigerant.
8. the refrigerant super-addition control method for air-conditioner according to claim 6, is characterized in that, after judging that comparative result is suitable as refrigerant, controls air-conditioner and exports the first alarm song, and control air-conditioner and shut down after Preset Time.
9. the refrigerant super-addition control method for air-conditioner according to claim 7, is characterized in that, after judging that comparative result is excessive as refrigerant, controls air-conditioner and exports the second alarm song, and control air-conditioner and directly shut down.
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| CN201510981203.8A CN105509242B (en) | 2015-12-23 | 2015-12-23 | A kind of refrigerant super-addition control method for air conditioner |
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| CN201510981203.8A CN105509242B (en) | 2015-12-23 | 2015-12-23 | A kind of refrigerant super-addition control method for air conditioner |
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| CN105509242B CN105509242B (en) | 2018-09-25 |
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| CN107339835A (en) * | 2017-07-25 | 2017-11-10 | 珠海格力电器股份有限公司 | Refrigerant quantity monitoring method and device |
| CN107894068A (en) * | 2017-11-14 | 2018-04-10 | 宁波奥克斯电气股份有限公司 | A kind of running state of air conditioner adjusting method and device |
| CN107906671A (en) * | 2017-10-31 | 2018-04-13 | 广东美的暖通设备有限公司 | Coolant quantity determination methods and system |
| CN107906672A (en) * | 2017-10-31 | 2018-04-13 | 广东美的暖通设备有限公司 | Coolant quantity determination methods and system |
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