CN106288160B - A kind of cryogenic refrigeration control method, low-temperature refrigeration control device and air conditioner - Google Patents
A kind of cryogenic refrigeration control method, low-temperature refrigeration control device and air conditioner Download PDFInfo
- Publication number
- CN106288160B CN106288160B CN201610643731.7A CN201610643731A CN106288160B CN 106288160 B CN106288160 B CN 106288160B CN 201610643731 A CN201610643731 A CN 201610643731A CN 106288160 B CN106288160 B CN 106288160B
- Authority
- CN
- China
- Prior art keywords
- temperature
- preset
- less
- low
- equal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000005057 refrigeration Methods 0.000 title claims abstract description 111
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000003507 refrigerant Substances 0.000 claims description 17
- 238000001816 cooling Methods 0.000 description 15
- 238000004378 air conditioning Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 238000007710 freezing Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
Classifications
-
- 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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
-
- 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
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Landscapes
- 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)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The present invention relates to a kind of cryogenic refrigeration control method, low-temperature refrigeration control device and air conditioner, which includes: that the indoor heat exchanger inlet temperature T0 of air conditioner is detected under cryogenic refrigeration mode；Judge whether T0 is greater than the first preset temperature and is less than or equal to the second preset temperature；When judging result is that T0 is greater than the first preset temperature and is less than or equal to the second preset temperature, determine that air conditioner enters cryogenic refrigeration mode operation.A kind of cryogenic refrigeration control method provided by the invention, low-temperature refrigeration control device and air conditioner, by under cryogenic refrigeration mode, detect the indoor heat exchanger inlet temperature T0 of air conditioner, and judge when T0 is greater than the first preset temperature and is less than or equal to the second preset temperature, it determines that air conditioner enters cryogenic refrigeration mode operation, so as to be accurately controlled the cryogenic refrigeration fan-out capability of air conditioner, guarantees demand of the user to cryogenic refrigeration.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a low-temperature refrigeration control method, a low-temperature refrigeration control device and an air conditioner.
Background
Conventional household air conditioners have no precise control over low temperature refrigeration, and some have no refrigeration capacity even in low temperature operation. In addition, under the normal condition, the inverter compressor can operate in a relatively large frequency range, and at the outdoor environment temperature of ultralow temperature, because the heat exchange effect of the outdoor heat exchanger of the air conditioner is good, the temperature of the refrigerant entering the outdoor heat exchanger is quickly close to the environment temperature, the pressure is also rapidly reduced, and further the amount of the refrigerant entering the indoor side is reduced, and the temperature of the refrigerant entering the indoor side is possibly lower than the outdoor environment temperature, so that the heat exchanger is easy to frost and freeze, and the refrigerating capacity is further influenced.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a low-temperature refrigeration control method, a low-temperature refrigeration control device and an air conditioner.
The technical scheme for solving the technical problems is as follows: a low-temperature refrigeration control method comprises the following steps:
step 1, detecting the inlet temperature T0 of an indoor side heat exchanger of an air conditioner in a low-temperature refrigeration mode;
step 2, judging whether T0 is greater than a first preset temperature and less than or equal to a second preset temperature;
and 3, when the judgment result is that the T0 is greater than the first preset temperature and less than or equal to the second preset temperature, determining that the air conditioner enters a low-temperature refrigeration mode to operate.
The invention has the beneficial effects that: through under the low temperature refrigeration mode, detect the indoor side heat exchanger entry temperature T0 of air conditioner to judge when T0 is greater than first preset temperature, and is less than or equal to the second when presetting the temperature, confirm that the air conditioner gets into the operation of low temperature refrigeration mode, thereby the low temperature refrigeration output capacity of control air conditioner that can be accurate guarantees the demand of user to low temperature refrigeration.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, still include: and 4, controlling the air conditioner to execute different operations according to different judgment results when the judgment result is that the T0 is not greater than the first preset temperature and is less than or equal to the second preset temperature.
Further, if the determination result is that T0 is less than or equal to the first preset temperature, step 4 specifically includes: and controlling an outdoor side fan of the air conditioner to operate at a rotating speed lower than the current rotating speed.
The beneficial effect of adopting the further scheme is that: through under the low temperature refrigeration mode, detect the indoor side heat exchanger entry temperature T0 of air conditioner to when judging that T0 is less than or equal to first preset temperature, the outdoor side fan of control air conditioner is with the rotational speed operation that is less than current rotational speed, thereby the low temperature refrigeration output capacity of control air conditioner that can be accurate guarantees the demand of user to low temperature refrigeration.
Further, if the determination result is that T0 is less than or equal to the first preset temperature, step 4 specifically includes:
step 4.1, detecting the temperature T2 of the middle part of an indoor side heat exchanger of the air conditioner;
step 4.2, judging whether T2 is greater than a third preset temperature and less than or equal to a fourth preset temperature, wherein the fourth preset temperature is less than the first preset temperature;
and 4.3, controlling the air conditioner to operate in a freeze protection mode when the T2 is greater than the third preset temperature and less than or equal to the fourth preset temperature.
The beneficial effect of adopting the further scheme is that: through under the low temperature refrigeration mode, when judging that indoor side heat exchanger inlet temperature T0 is less than or equal to first preset temperature, judge then that the indoor side heat exchanger middle part temperature T2 that detects is greater than the third and preset the temperature, and when being less than or equal to the fourth and preset the temperature, control air conditioner prevents the operation of freezing protection mode to can prevent that air conditioning system from by the refrigerated condition, avoid the influence to the low temperature refrigeration output capacity of air conditioner.
Further, if the determination result is that T0 is greater than the second preset temperature, step 4 specifically includes:
4.4, detecting the middle temperature T2 of the indoor side heat exchanger of the air conditioner and the current indoor environment temperature T1;
step 4.5, judging whether the temperature difference between T2 and T1 is less than or equal to the first preset temperature;
step 4.6, when the temperature difference is less than or equal to the first preset temperature, detecting whether a refrigerant leaks;
and 4.7, controlling the running frequency of the compressor of the air conditioner to be higher than the current running frequency when the refrigerant leakage is not detected.
The beneficial effect of adopting the further scheme is that: through under the low temperature refrigeration mode, detect indoor side heat exchanger entry temperature T0 of air conditioner, and when judging T0 and being greater than the second and predetermine the temperature, then judge that the temperature difference of indoor side heat exchanger middle part temperature T2 that detects and current indoor ambient temperature T1 is less than or equal to first when predetermineeing the temperature, whether detect and have the refrigerant to leak, when not detecting the refrigerant and leak, the operating frequency of the compressor of control air conditioner is higher than current operating frequency, thereby realize indoor side normal refrigeration and guarantee air conditioning system especially the reliability of compressor.
Further, before step 1, the method further comprises: step 5, detecting the current outdoor environment temperature T4; step 6, determining whether the detected current outdoor environment temperature T4 is less than a first preset environment temperature; and 7, entering the low-temperature refrigeration mode when the current outdoor environment temperature T4 is determined to be less than the first preset environment temperature.
Further, after step 7, the method further comprises: step 8, detecting the outdoor environment temperature T4 and the duration T of entering the low-temperature refrigeration mode; step 9, judging whether T4 is greater than or equal to the first preset environment temperature and less than or equal to a second preset environment temperature, and whether T is less than a preset time period; and step 10, determining whether to exit the low-temperature refrigeration mode according to the judgment result.
Further, step 10 specifically includes: and when the judgment result is that the T4 is greater than or equal to the first preset environment temperature and less than or equal to the second preset environment temperature, and T is less than the preset time period, determining not to exit the low-temperature refrigeration mode.
Further, step 10 specifically includes: and when the judgment result is that the T4 is greater than or equal to the first preset environment temperature and less than or equal to the second preset environment temperature, and T is greater than or equal to the preset time period, determining to exit the low-temperature refrigeration mode.
Further, step 8 specifically comprises: when the detected T4 is less than the first preset ambient temperature, T is re-timed.
The beneficial effect of adopting the further scheme is that: the timing error can be prevented, and the accuracy for judging whether to exit the low-temperature refrigeration mode is provided.
Further, the first preset temperature is 5 ℃, the second preset temperature is 10 ℃, the third preset temperature is 0 ℃, the fourth preset temperature is 4 ℃, the first preset environmental temperature is 20 ℃, the second preset environmental temperature is 22.5 ℃, and the preset time period is 30 min.
Another technical solution of the present invention for solving the above technical problems is as follows: a cryogenic refrigeration control device configured to implement the cryogenic refrigeration method of any of the above embodiments.
Another technical solution of the present invention for solving the above technical problems is as follows: an air conditioner comprises the low-temperature refrigeration control device in the embodiment.
Advantages of additional aspects of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
Fig. 1 is a schematic flow chart of a low-temperature refrigeration control method according to an embodiment of the present invention;
fig. 2 is a schematic flow chart of a low-temperature refrigeration control method according to another embodiment of the present invention;
fig. 3 is a schematic flow chart of a low-temperature refrigeration control method according to another embodiment of the present invention;
fig. 4 is a schematic flow chart of a low-temperature refrigeration control method according to another embodiment of the present invention;
fig. 5 is a schematic flowchart of a low-temperature refrigeration control method according to another embodiment of the present invention.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
Fig. 1 is a schematic flow chart of a low-temperature refrigeration control method 100 according to an embodiment of the present invention. As shown in fig. 1, the main execution body of the low-temperature refrigeration control method 100 may be an air conditioner or a low-temperature refrigeration control device disposed in the air conditioner, and the low-temperature refrigeration control method 100 includes:
in the low-temperature cooling mode, 101, an inlet temperature T0 of the indoor-side heat exchanger of the air conditioner is detected.
102, it is determined whether T0 is greater than the first predetermined temperature and less than or equal to the second predetermined temperature.
103, when the judgment result is that T0 is greater than the first preset temperature and less than or equal to the second preset temperature, determining that the air conditioner enters a low-temperature cooling mode to operate.
In the low-temperature refrigeration control method provided in the above embodiment, the inlet temperature T0 of the indoor-side heat exchanger of the air conditioner is detected in the low-temperature refrigeration mode, and it is determined that the air conditioner enters the low-temperature refrigeration mode to operate when the temperature T0 is greater than the first preset temperature and less than or equal to the second preset temperature, so that the low-temperature refrigeration output capacity of the air conditioner can be accurately controlled, and the requirement of a user on low-temperature refrigeration is met.
Optionally, in an embodiment, the low temperature refrigeration control method 100 may further include: and when the judgment result is not that the T0 is greater than the first preset temperature and less than or equal to the second preset temperature, controlling the air conditioner to execute different operations according to different judgment results.
Specifically, as an embodiment of the present invention, as shown in fig. 2, when the determination result is that T0 is less than or equal to the first preset temperature, the low-temperature refrigeration control method 100 may further include:
and 104, controlling an outdoor side fan of the air conditioner to operate at a rotating speed lower than the current rotating speed.
Specifically, in this embodiment, the operating speed of the outdoor side fan of the air conditioner may be controlled to gradually decrease until it becomes 0.
In the low-temperature refrigeration control method provided in the above embodiment, the inlet temperature T0 of the indoor side heat exchanger of the air conditioner is detected in the low-temperature refrigeration mode, and when it is determined that T0 is less than or equal to the first preset temperature, the outdoor side fan of the air conditioner is controlled to operate at a rotation speed lower than the current rotation speed, so that the low-temperature refrigeration output capacity of the air conditioner can be accurately controlled, and the requirement of a user on low-temperature refrigeration is met.
In another embodiment, as shown in fig. 2, when the determination result is that T0 is less than or equal to the first preset temperature, the low temperature refrigeration control method 100 may further include:
105, detecting the temperature T2 of the middle part of the indoor side heat exchanger of the air conditioner.
106, it is determined whether T2 is greater than the third preset temperature and less than or equal to the fourth preset temperature. Wherein the fourth preset temperature is lower than the first preset temperature.
And 107, when the T2 is greater than the third preset temperature and less than or equal to the fourth preset temperature, controlling the air conditioner to operate in the anti-freezing protection mode.
In the low-temperature refrigeration control method provided in the above embodiment, when the inlet temperature T0 of the indoor side heat exchanger is determined to be less than or equal to the first preset temperature in the low-temperature refrigeration mode, and then when the detected middle temperature T2 of the indoor side heat exchanger is determined to be greater than the third preset temperature and less than or equal to the fourth preset temperature, the air conditioner is controlled to operate in the freeze protection mode, so that the condition that the air conditioning system is frozen can be prevented, and the influence on the low-temperature refrigeration output capacity of the air conditioner is avoided.
In another embodiment, as shown in fig. 2, when the determination result is that T0 is greater than the second preset temperature, the low temperature refrigeration control method 100 may further include:
and 108, detecting the middle temperature T2 of the indoor side heat exchanger of the air conditioner and the current indoor environment temperature T1.
109, it is determined whether the temperature difference between T2 and T1 is less than or equal to the first preset temperature.
And 110, detecting whether the refrigerant leaks or not when the temperature difference is less than or equal to the first preset temperature.
And 111, controlling the running frequency of the compressor of the air conditioner to be higher than the current running frequency when the refrigerant leakage is not detected.
In the low-temperature refrigeration control method provided in the above embodiment, when the inlet temperature T0 of the indoor side heat exchanger of the air conditioner is detected in the low-temperature refrigeration mode, and it is determined that T0 is greater than the second preset temperature, and it is then determined that the temperature difference between the detected intermediate temperature T2 of the indoor side heat exchanger and the current indoor environment temperature T1 is less than or equal to the first preset temperature, whether refrigerant leakage occurs is detected, and when refrigerant leakage is not detected, the operating frequency of the compressor of the air conditioner is controlled to be higher than the current operating frequency, so that normal refrigeration of the indoor side is achieved, and the reliability of the air conditioning system, particularly the compressor, is ensured.
Optionally, as another embodiment of the present invention, as shown in fig. 3, before step 101, the low-temperature refrigeration control method 100 may further include:
and 112, detecting the current outdoor environment temperature T4.
113, it is determined whether the detected current outdoor ambient temperature T4 is less than a first preset ambient temperature.
114, when it is determined that the current outdoor ambient temperature T4 is less than the first preset ambient temperature, a low temperature cooling mode is entered.
Alternatively, as another embodiment of the present invention, as shown in fig. 4, the low temperature refrigeration control method 100 may include:
and 112, detecting the current outdoor environment temperature T4.
113, it is determined whether the detected current outdoor ambient temperature T4 is less than a first preset ambient temperature.
114, when it is determined that the current outdoor ambient temperature T4 is less than the first preset ambient temperature, a low temperature cooling mode is entered. Step 101 to step 103 are performed or step 115 to step 118 are performed.
In the low-temperature cooling mode, 101, an inlet temperature T0 of the indoor-side heat exchanger of the air conditioner is detected.
102, it is determined whether T0 is greater than the first predetermined temperature and less than or equal to the second predetermined temperature.
103, when the judgment result is that T0 is greater than the first preset temperature and less than or equal to the second preset temperature, determining that the air conditioner enters a low-temperature refrigeration mode to operate.
Alternatively, 115, the outdoor ambient temperature T4 and the duration T of entering the low temperature cooling mode are detected.
Specifically, in this embodiment, when the detected T4 is less than the first preset ambient temperature, T is re-timed. That is, after it has been determined in step 114 that the low temperature cooling mode is entered, the duration T of entering the low temperature cooling mode may be recorded, and when T4 detected at a certain time is less than the first preset ambient temperature, the duration T of entering the low temperature cooling mode may be recorded again from the time. Therefore, timing errors can be prevented, and the accuracy of judging whether to exit the low-temperature refrigeration mode is provided.
116, it is determined whether T4 is greater than or equal to the first preset ambient temperature and less than or equal to the second preset ambient temperature, and whether T is less than the preset time period.
And 117, determining not to exit the low temperature refrigeration mode when the determination result is that T4 is greater than or equal to the first preset environment temperature and less than or equal to the second preset environment temperature, and T is less than the preset time period. Then execution continues at step 101.
118, when the judgment result is that T4 is greater than or equal to the first preset ambient temperature and less than or equal to the second preset ambient temperature, and T is greater than or equal to the preset time period, it is determined to exit the low temperature refrigeration mode. Step 112 is performed.
It should be noted that, in this embodiment, step 104 to step 111 shown in fig. 2 may also be included, and details are not repeated here for brevity of description.
It should be understood that, in the embodiment of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiment of the present invention.
The low-temperature refrigeration control method provided in the above embodiment achieves the purpose that the output of the low-temperature refrigeration capacity is maximized by controlling the conditions of entering the low-temperature refrigeration mode and selecting different modes according to different conditions.
The following takes "the first preset temperature is 5 ℃, the second preset temperature is 10 ℃, the third preset temperature is 0 ℃, the fourth preset temperature is 4 ℃, the first preset environmental temperature is 20 ℃, the second preset environmental temperature is 22.5 ℃, and the preset time period is 30 min" as an example, and the technical scheme of the embodiment of the present invention is described in detail with reference to fig. 5. It should be understood that this is only an example and does not constitute any limitation on the embodiments of the present invention.
The low temperature refrigeration control method 200 shown in fig. 5 includes:
and 210, detecting the current outdoor environment temperature T4.
220, it is determined whether the detected current outdoor ambient temperature T4 is less than 20 ℃.
And 230, when the current outdoor ambient temperature T4 is determined to be less than 20 ℃, entering a low-temperature cooling mode. Steps 240 to 293 are performed or steps 250 to 253 are performed.
250, the outdoor ambient temperature T4 and the duration T of entering the low temperature cooling mode are detected.
Specifically, in this embodiment, T is re-timed when T4<20 ℃ is detected. That is, after it has been determined in step 230 that the low temperature cooling mode is entered, the duration T of entering the low temperature cooling mode may be recorded, and when T4<20 ℃ detected at a certain time, the duration T of entering the low temperature cooling mode may be recorded again from the time.
251, determining whether T4 is greater than or equal to 20 ℃ and less than or equal to 22.5 ℃, and T is less than 30 min.
252, when the judgment result is that the temperature is 20 ℃ and T4 is less than or equal to 22.5 ℃ and T is less than 30min, determining not to exit the low-temperature refrigeration mode. Then execution continues at step 240.
253, when the judgment result is that the temperature is 20 ℃ and T4 is less than or equal to 22.5 ℃ and T is more than or equal to 30min, determining to exit the low-temperature refrigeration mode. Step 210 is performed.
Or,
in the low-temperature cooling mode, an inlet temperature T0 of the indoor heat exchanger of the air conditioner is detected 240.
260, judging whether T0 is more than 5 ℃ and less than or equal to 10 ℃.
270, when the judgment result is that the temperature is 5 ℃ and T0 is less than or equal to 10 ℃, determining that the air conditioner enters the low-temperature refrigeration mode to operate.
280, when the judgment result is that T0 is more than 10 ℃, detecting the middle temperature T2 of the indoor side heat exchanger of the air conditioner and the current indoor environment temperature T1.
281, judging whether the temperature difference of T2-T1 is less than or equal to 5 ℃.
282, when T2-T1 is less than or equal to 5 ℃, detecting whether refrigerant leaks.
Specifically, in this embodiment, if a refrigerant leakage is detected, it indicates that the air conditioning system is not normal, and the operating frequency of the compressor may not be adjusted. If the refrigerant leakage is not detected, the air conditioning system is normal, and the running frequency of the compressor can be adjusted.
283, when the refrigerant leakage is not detected, controlling the operation frequency of the compressor of the air conditioner to be higher than the current operation frequency.
290, when the judgment result is that T0 is less than or equal to 5 ℃, controlling the outdoor side fan of the air conditioner to operate at the rotating speed lower than the current rotating speed.
Specifically, in this embodiment, the operating speed of the outdoor side fan of the air conditioner may be controlled to gradually decrease until it becomes 0.
291, when the judgment result is that T0 is less than or equal to 5 ℃, detecting the middle temperature T2 of the indoor side heat exchanger of the air conditioner.
292, determine whether T2 is greater than 0 ℃ and less than or equal to 4 ℃.
293, when the temperature is 0 ℃ and T2 is less than or equal to 4 ℃, the air conditioner is controlled to operate in the anti-freezing protection mode. Thereby preventing the air conditioning system from being frozen.
It should be appreciated that in this embodiment, step 270, step 280, and step 290 are performed in no order.
It should also be understood that, in the embodiments of the present invention, the sequence numbers of the above-mentioned processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation on the implementation process of the embodiments of the present invention.
The invention also provides a low-temperature refrigeration control device. The low temperature refrigeration control device may be configured to perform the low temperature refrigeration method in any of the embodiments described above.
The low-temperature refrigeration control device provided in the above embodiment achieves the purpose that the output of the low-temperature refrigeration capacity is maximized by controlling the conditions of entering the low-temperature refrigeration mode and selecting different modes according to different conditions.
In addition, the invention also provides an air conditioner. The air conditioner comprises the low-temperature refrigeration control device.
The air conditioner provided in the above embodiment controls the condition of entering the low-temperature refrigeration mode through the included low-temperature refrigeration control device, and selects different modes according to different conditions to achieve the purpose that the output of the low-temperature refrigeration capacity is maximized.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A low-temperature refrigeration control method is characterized by comprising the following steps:
step 1, detecting the inlet temperature T0 of an indoor side heat exchanger of an air conditioner in a low-temperature refrigeration mode;
step 2, judging whether T0 is greater than a first preset temperature and less than or equal to a second preset temperature;
step 3, when the judgment result is that the T0 is greater than the first preset temperature and less than or equal to the second preset temperature, determining that the air conditioner enters a low-temperature refrigeration mode to operate;
step 4, when the judgment result is that the T0 is not greater than the first preset temperature and is less than or equal to the second preset temperature, controlling the air conditioner to execute different operations according to different judgment results;
wherein, the determination result is that T0 is less than or equal to the first preset temperature, and step 4 specifically includes:
step 4.1, detecting the temperature T2 of the middle part of an indoor side heat exchanger of the air conditioner;
step 4.2, judging whether T2 is greater than a third preset temperature and less than or equal to a fourth preset temperature, wherein the fourth preset temperature is less than the first preset temperature;
step 4.3, when the T2 is greater than the third preset temperature and less than or equal to the fourth preset temperature, controlling the air conditioner to operate in a freeze protection mode;
or, if the determination result is that T0 is greater than the second preset temperature, step 4 specifically includes:
4.4, detecting the middle temperature T2 of the indoor side heat exchanger of the air conditioner and the current indoor environment temperature T1;
step 4.5, judging whether the temperature difference between T2 and T1 is less than or equal to the first preset temperature;
step 4.6, when the temperature difference is less than or equal to the first preset temperature, detecting whether a refrigerant leaks;
and 4.7, controlling the running frequency of the compressor of the air conditioner to be higher than the current running frequency when the refrigerant leakage is not detected.
2. The method for controlling low-temperature refrigeration according to claim 1, further comprising, before step 1:
step 5, detecting the current outdoor environment temperature T4;
step 6, determining whether the detected current outdoor environment temperature T4 is less than a first preset environment temperature;
and 7, entering the low-temperature refrigeration mode when the current outdoor environment temperature T4 is determined to be less than the first preset environment temperature.
3. The cryogenic refrigeration control method according to claim 2, further comprising, after step 7:
step 8, detecting the outdoor environment temperature T4 and the duration T of entering the low-temperature refrigeration mode;
step 9, judging whether T4 is greater than or equal to the first preset environment temperature and less than or equal to a second preset environment temperature, and whether T is less than a preset time period;
and step 10, determining whether to exit the low-temperature refrigeration mode according to the judgment result.
4. The method for controlling low-temperature refrigeration according to claim 3, wherein the step 10 is specifically:
and when the judgment result is that the T4 is greater than or equal to the first preset environment temperature and less than or equal to the second preset environment temperature, and T is less than the preset time period, determining not to exit the low-temperature refrigeration mode.
5. The method for controlling low-temperature refrigeration according to claim 3, wherein the step 10 is specifically:
and when the judgment result is that the T4 is greater than or equal to the first preset environment temperature and less than or equal to the second preset environment temperature, and T is greater than or equal to the preset time period, determining to exit the low-temperature refrigeration mode.
6. The method for controlling low-temperature refrigeration according to claim 5, wherein the step 8 is specifically:
when the detected T4 is less than the first preset ambient temperature, T is re-timed.
7. The cryogenic refrigeration control method according to claim 2, wherein the first preset temperature is 5 ℃, the second preset temperature is 10 ℃, the third preset temperature is 0 ℃, the fourth preset temperature is 4 ℃, the first preset ambient temperature is 20 ℃, the second preset ambient temperature is 22.5 ℃, and the preset time period is 30 min.
8. A cryogenic refrigeration control device configured to implement the cryogenic refrigeration method according to any one of claims 1 to 7.
9. An air conditioner characterized by comprising the low temperature refrigeration control device according to claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610643731.7A CN106288160B (en) | 2016-08-08 | 2016-08-08 | A kind of cryogenic refrigeration control method, low-temperature refrigeration control device and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610643731.7A CN106288160B (en) | 2016-08-08 | 2016-08-08 | A kind of cryogenic refrigeration control method, low-temperature refrigeration control device and air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106288160A CN106288160A (en) | 2017-01-04 |
| CN106288160B true CN106288160B (en) | 2019-04-09 |
Family
ID=57666341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610643731.7A Active CN106288160B (en) | 2016-08-08 | 2016-08-08 | A kind of cryogenic refrigeration control method, low-temperature refrigeration control device and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106288160B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109945427B (en) * | 2019-03-12 | 2020-07-14 | 珠海格力电器股份有限公司 | Air conditioning equipment control method and device, storage medium and air conditioning equipment |
| CN111023515B (en) * | 2019-12-18 | 2021-08-13 | 广东美的制冷设备有限公司 | Air conditioner, refrigeration control method of air conditioner and storage medium |
| CN111947280A (en) * | 2020-07-16 | 2020-11-17 | 海信（山东）空调有限公司 | Air conditioning system and control method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007292428A (en) * | 2006-04-27 | 2007-11-08 | Daikin Ind Ltd | Air conditioner |
| CN101464033A (en) * | 2007-12-19 | 2009-06-24 | 海尔集团公司 | Antifreeze method and system for indoor unit of air conditioner |
| CN104089380A (en) * | 2014-07-31 | 2014-10-08 | 广东志高空调有限公司 | Ultralow-temperature air conditioner refrigeration method and device |
| CN104913451A (en) * | 2015-06-01 | 2015-09-16 | 广东美的制冷设备有限公司 | Control method of air conditioner |
| CN105423495A (en) * | 2015-12-16 | 2016-03-23 | 美的集团武汉制冷设备有限公司 | Air conditioner as well as freeze control method and device thereof |
-
2016
- 2016-08-08 CN CN201610643731.7A patent/CN106288160B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007292428A (en) * | 2006-04-27 | 2007-11-08 | Daikin Ind Ltd | Air conditioner |
| CN101464033A (en) * | 2007-12-19 | 2009-06-24 | 海尔集团公司 | Antifreeze method and system for indoor unit of air conditioner |
| CN104089380A (en) * | 2014-07-31 | 2014-10-08 | 广东志高空调有限公司 | Ultralow-temperature air conditioner refrigeration method and device |
| CN104913451A (en) * | 2015-06-01 | 2015-09-16 | 广东美的制冷设备有限公司 | Control method of air conditioner |
| CN105423495A (en) * | 2015-12-16 | 2016-03-23 | 美的集团武汉制冷设备有限公司 | Air conditioner as well as freeze control method and device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106288160A (en) | 2017-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107131611B (en) | Defrosting control method for air conditioner | |
| US7856836B2 (en) | Refrigerating air conditioning system | |
| CN109556232B (en) | Four-way valve abnormality detection method and device and air conditioning unit | |
| CN109539478B (en) | Air conditioner control method and device and air conditioner | |
| EP3734177B1 (en) | Control method for air conditioner | |
| CN109210696B (en) | Control method for anti-freezing protection of air conditioner | |
| CN108195026B (en) | Defrosting control method, control device, air conditioner and readable storage medium | |
| CN111271821A (en) | Four-way valve reversing abnormity control method, storage medium and air conditioner | |
| CN111895606B (en) | Anti-freezing control method and air conditioner | |
| CN107120796B (en) | Defrosting control method for air conditioner | |
| CN106288160B (en) | A kind of cryogenic refrigeration control method, low-temperature refrigeration control device and air conditioner | |
| CN112032941A (en) | Control method of air conditioner | |
| CN115031351B (en) | Air conditioner and defrosting control method thereof | |
| CN106196507A (en) | Air-conditioner and the control method of air-conditioner | |
| CN107289576B (en) | Defrosting control method for air conditioner | |
| CN110470009B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| CN112032923A (en) | Four-way valve reversing abnormity detection method and device and cold and hot water air conditioning unit | |
| US12061004B2 (en) | Expansion valve control method for multi-connection air-conditioning system | |
| CN110873435B (en) | Anti-frosting control method for indoor unit of air conditioner | |
| CN114076384A (en) | Control method and system of air conditioning equipment, air conditioning equipment and storage medium | |
| US20160320099A1 (en) | Indoor unit of air conditioner | |
| CN115264887A (en) | Air conditioner anti-freezing control method and device, electronic equipment and storage medium | |
| CN110470003B (en) | Control method and device for defrosting of air conditioner and air conditioner | |
| CN108626853B (en) | Refrigeration apparatus, operation control method, and computer-readable storage medium | |
| CN110836466B (en) | Defrosting control method for fixed-frequency air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |