CN109631234B - Heating and defrosting control method and system for outdoor unit of air conditioner - Google Patents
Heating and defrosting control method and system for outdoor unit of air conditioner Download PDFInfo
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- CN109631234B CN109631234B CN201811360200.2A CN201811360200A CN109631234B CN 109631234 B CN109631234 B CN 109631234B CN 201811360200 A CN201811360200 A CN 201811360200A CN 109631234 B CN109631234 B CN 109631234B
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 197
- 238000010257 thawing Methods 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 37
- 230000000694 effects Effects 0.000 abstract description 25
- 230000003111 delayed effect Effects 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/62—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
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Abstract
The invention discloses a heating defrosting control method and a heating defrosting control system for an air conditioner outdoor unit, wherein a heating device is started when a defrosting mode is started; after the defrosting mode is finished, delaying the set delay time, and then clearing the duration time t1 and the duration time t 2; restarting timing, after setting time, judging whether the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time or not, and the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode; if so, controlling the starting operation time of the heating device according to the outer ring temperature Ta; if not, the heating device is closed; according to the invention, the starting operation time of the heating device is accurately controlled according to the size of the outer ring temperature Ta, so that the defrosting effect can be consolidated, the power consumption of the heating device can be reduced, and the problems of inaccurate control and high power consumption of the heating device in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a heating defrosting control method and system for an air conditioner outdoor unit.
Background
In the winter low-temperature heating operation process of the air conditioner, the outdoor unit frosts more along with the lengthening of the operation time of the air conditioner, the more frosting, the greater influence on the heat exchange efficiency of the outdoor unit is, and the indoor heating effect is reduced. At present, an air conditioner product adopts an electric heating wire method to perform auxiliary defrosting on an outdoor unit, but the control is too simple and not accurate enough, so that the electric heating wire is in an open state for a long time, and the power consumption is increased.
Disclosure of Invention
The invention provides a heating and defrosting control method for an air conditioner outdoor unit, which solves the problems of inaccurate heating control and high power consumption in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
a heating and defrosting control method for an outdoor unit of an air conditioner, wherein a heating device is arranged on a base plate of the outdoor unit and used for heating the base plate, and the control method comprises the following steps:
starting a heating device when the defrosting mode is started;
after the defrosting mode is finished, delaying the set delay time, and then executing the step (1);
(1) the durations t1 and t2 are cleared; restarting timing, and executing the step (2) after setting time;
(2) judging whether the following conditions are met: the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time, the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode;
if yes, executing the step (3): controlling the starting operation time of the heating device according to the outer ring temperature Ta, which specifically comprises the following steps:
(31) if the first set outer ring temperature is less than or equal to Ta and less than or equal to the set outer ring temperature low value, the heating device is started to operate for a first set time period, then the heating device is closed for a second set time period, and then the step (1) is returned;
(32) if the second set external ring temperature is less than or equal to Ta and less than the first set external ring temperature, the heating device is started to operate for a third set time period, then the fourth set time period is closed, and the step (1) is returned;
(33) if Ta is less than the second set outer ring temperature, starting the heating device to operate, and returning to the step (1);
the first set time period is less than the third set time period, and the second set time period is greater than the fourth set time period;
if not, executing the step (4): the heating device is turned off.
Further, after the step (4), the method further comprises the following steps:
(5) the durations t1 and t2 are cleared; restarting timing, and executing the step (6) after setting time;
(6) judging whether the following conditions are met: the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time, the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode;
if not, keeping closing the heating device; returning to the step (5);
if yes, executing the step (7): controlling the starting operation time of the heating device according to the outer ring temperature Ta, which specifically comprises the following steps:
(71) if the first set outer ring temperature is less than or equal to Ta and less than or equal to the set outer ring temperature low value, the heating device is started to operate for a first set time period, then the heating device is closed for a second set time period, and then the step (5) is returned;
(72) if the second set external ring temperature is less than or equal to Ta and less than the first set external ring temperature, the heating device is started to operate for a third set time period, then the fourth set time period is closed, and then the step (5) is returned;
(73) if Ta is less than the second set outer ring temperature, starting the heating device to operate, and executing the step (8);
(8) the durations t3 and t4 are cleared; restarting timing, and executing the step (9) after setting time;
(9) judging whether the following conditions are met: the duration t3 that the temperature Te of the coil of the outdoor heat exchanger is more than or equal to the high value of the set coil temperature reaches the set time, or the duration t4 that the outer ring temperature Ta is more than or equal to the high value of the set outer ring temperature reaches the set time, or the compressor stops running, or the air conditioner is in a non-heating mode;
if not, returning to the step (8);
if yes, returning to the step (4).
Still further, the set delay time has a value ranging from 8 minutes to 12 minutes.
Furthermore, the value range of the set time is 4-6 minutes.
Further, the low value of the coil temperature is set to be-2 ℃, and the low value of the external ring temperature is set to be 0 ℃.
Furthermore, the value range of the first set external loop temperature is-4 ℃ to-6 ℃, and the value range of the second set external loop temperature is-10 ℃ to-12 ℃.
Still further, the value range of the first set time period is 23-27 minutes, the value range of the second set time period is 33-37 minutes, the value range of the third set time period is 28-32 minutes, and the value range of the fourth set time period is 28-32 minutes.
Further, the coil temperature was set to 13 ℃ and the external loop temperature was set to 3 ℃.
A heating and defrosting control system of an outdoor unit of an air conditioner, wherein a heating device is arranged on a chassis of the outdoor unit and used for heating the chassis, and the control system comprises: a first timing module for clearing the durations t1 and t 2; restarting timing; the first judgment module is used for judging whether the following conditions are met: the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time, the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode; the heating device control module is used for controlling the starting operation time of the heating device according to the outer ring temperature Ta, and specifically comprises: if the first set outer ring temperature is less than or equal to Ta and less than or equal to the set outer ring temperature low value, the heating device is started to operate for a first set time period, and then the heating device is closed for a second set time period; if the second set external ring temperature is less than or equal to Ta and less than the first set external ring temperature, the heating device is started to operate for a third set time period, and then the heating device is closed for a fourth set time period; if Ta is less than the second set outer ring temperature, the heating device is started to operate; the first set time period is less than the third set time period, and the second set time period is greater than the fourth set time period; for switching off the heating means.
Further, the control system further includes: a second timing module for clearing the durations t3 and t 4; restarting timing; the second judgment module is used for judging whether the following conditions are met: the duration t3 that the temperature Te of the coil of the outdoor heat exchanger is more than or equal to the high value of the set coil temperature reaches the set time, or the duration t4 that the temperature Ta of the outer ring is more than or equal to the high value of the set outer ring temperature reaches the set time, or the compressor stops running, or the air conditioner is in a non-heating mode.
Compared with the prior art, the invention has the advantages and positive effects that: according to the heating defrosting control method and the heating defrosting control system for the air conditioner outdoor unit, the heating device is started when a defrosting mode is started; after the defrosting mode is finished, delaying the set delay time, and then clearing the duration time t1 and the duration time t 2; restarting timing, after setting time, judging whether the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time or not, and the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode; if so, controlling the starting operation time of the heating device according to the outer ring temperature Ta; if not, the heating device is closed; the control method of the embodiment accurately controls the starting operation time of the heating device according to the size of the outer ring temperature Ta, not only can realize the effect of strengthening the defrosting effect, but also can reduce the power consumption of the heating device, and solves the problems of inaccurate control and large power consumption of the heating device in the prior art.
Other features and advantages of the present invention will become more apparent from the detailed description of the embodiments of the present invention when taken in conjunction with the accompanying drawings.
Drawings
Fig. 1 is a flowchart illustrating a heating and defrosting control method for an outdoor unit of an air conditioner according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a heating and defrosting control method for an outdoor unit of an air conditioner according to another embodiment of the present invention.
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The embodiment provides a heating and defrosting control method and system for an air conditioner outdoor unit, which can accurately control the starting operation time of a heating device, reduce power consumption and improve defrosting effect. Next, the heating and defrosting control method of the air conditioner outdoor unit according to the present embodiment will be described in detail.
The air conditioner comprises an air conditioner indoor unit and an air conditioner outdoor unit, wherein the air conditioner indoor unit is connected with the air conditioner outdoor unit. The outdoor unit of the air conditioner comprises a compressor, an outdoor heat exchanger, a chassis and the like, wherein the outdoor heat exchanger is arranged on the chassis. The outdoor unit chassis is provided with a heating device for heating the chassis so as to heat the outdoor heat exchanger. In this embodiment, the heating device is an electric heating wire.
In the heating process of the air conditioner, when the defrosting condition is met, the air conditioner enters a defrosting mode, the four-way valve is reversed, defrosting starts, high-temperature refrigerant discharged by the compressor enters the outdoor heat exchanger through the four-way valve, the temperature of the outdoor heat exchanger rises, frost on the surface of the outdoor heat exchanger starts to melt into water, and the water drops to the base plate; when entering the defrosting mode, the heating device is started to heat the chassis to assist in defrosting.
The heating and defrosting control method for the outdoor unit of the air conditioner in the embodiment mainly includes the following steps, which are shown in fig. 1.
Step S0: starting a heating device when the defrosting mode is started; after the defrosting mode is finished, the set delay time is delayed, and then step S1 is executed.
The set delay time is delayed because the heating device is kept on after the defrosting mode is finished, the temperature of the coil of the outdoor heat exchanger may also rise, and in order to ensure the accuracy of the subsequent control, the step S1 is executed after the set delay time is delayed after the defrosting mode is finished.
In this embodiment, the delay time is set to a value ranging from 8 minutes to 12 minutes. By selecting the range, the misjudgment of subsequent control caused by too short delay time is avoided, and the influence of too long delay time on the opening and closing of the heating device and the defrosting effect is also avoided. As a preferred design of this embodiment, the set delay time is 10 minutes, which not only ensures the accuracy of the subsequent control, but also avoids affecting the defrosting effect.
In addition, under the condition of the U.S. fixed frequency H2V and H22, namely the condition of detecting capacity energy consumption, the heating device is prohibited to be started.
Step S1: duration t1 and duration t2 are cleared; the timer is restarted, and after the time is set, step S2 is executed.
Step S2: judging whether the following conditions are met: the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time, the duration t2 that the temperature Ta of the outer ring is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode.
That is, it is determined whether: in the time period from the start of timing to the set time, the temperature Te of the coil of the outdoor heat exchanger is always less than or equal to the set coil temperature low value, and the outer ring temperature Ta is always less than or equal to the set outer ring temperature low value; the air conditioner is in a heating mode and the compressor is in operation.
If yes, it means that all of the four conditions are satisfied, then step S3 is executed: controlling the starting operation time of the heating device according to the outer ring temperature Ta, which specifically comprises the following steps:
s31: if the first set outer ring temperature is less than or equal to Ta and less than or equal to the set outer ring temperature low value, which indicates that the outer ring temperature Ta is lower, the heating device is started to operate for a first set time period, then is closed for a second set time period, and then the step S1 is returned. The heating device has short starting operation time and long closing time, thereby ensuring the defrosting effect and reducing the power consumption of the heating device.
S32: if the second set outer ring temperature is less than or equal to Ta and less than the first set outer ring temperature, which indicates that the outer ring temperature Ta is lower, the heating device is started to operate for a third set time period, then the heating device is closed for a fourth set time period, and then the step S1 is returned. The heating device has longer on-time and shorter off-time, thereby ensuring the defrosting effect and reducing the power consumption of the heating device.
S33: if Ta < the second set outer ring temperature, indicating that the outer ring temperature Ta is very low, the heating apparatus is turned on and operated, and returns to step S1.
The first set time period is less than the third set time period, and the second set time period is greater than the fourth set time period.
According to the size of outer loop temperature Ta, the opening operation duration and the closing time of accurate control heating device can realize the effect of consolidating the defrosting effect, can reduce heating device's consumption again. The starting operation time of the heating device is refined through accurate outer ring temperature control logic, the effective utilization of the heating device is realized, and the power consumed by long-time starting of the heating device is reduced.
If not, it means that at least one of the four conditions is not satisfied, then step S4 is executed: the heating device is turned off.
In the heating and defrosting control method of the air conditioner outdoor unit in the embodiment, when the defrosting mode starts, the heating device is started; after the defrosting mode is finished, delaying the set delay time, and then clearing the duration time t1 and the duration time t 2; restarting timing, after setting time, judging whether the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time or not, and the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode; if so, controlling the starting operation time of the heating device according to the outer ring temperature Ta; if not, the heating device is closed; the control method of the embodiment accurately controls the starting operation time of the heating device according to the size of the outer ring temperature Ta, not only can the defrosting effect be consolidated, but also the power consumption of the heating device can be reduced.
In this embodiment, the setting time is set to a value ranging from 4 minutes to 6 minutes. By selecting the range, the misjudgment of subsequent control caused by too short time is avoided, and the influence of too long time on the opening and closing of the heating device and the defrosting effect is also avoided. As a preferred design of this embodiment, the setting time is 5 minutes, which not only ensures the accuracy of the subsequent control, but also avoids affecting the defrosting effect.
In this example, the coil temperature was set to-2 ℃ and the external loop temperature was set to 0 ℃. When the temperature Te of the coil pipe of the outdoor heat exchanger is less than or equal to minus 2 ℃ and the outer ring temperature Ta is less than or equal to 0 ℃, the outdoor heat exchanger still has great possibility of frosting, and therefore the temperature Te is taken as a necessary condition for starting the heating device.
The value range of the first set time period is 23-27 minutes, the value range of the second set time period is 33-37 minutes, the value range of the third set time period is 28-32 minutes, and the value range of the fourth set time period is 28-32 minutes. By selecting the value range, the reasonable starting operation time of the heating device can be ensured, the defrosting effect is ensured, and the phenomenon that the power consumption is larger due to the overlong starting time of the heating device is avoided. As a preferable design of this embodiment, the first set time period is 25 minutes, the second set time period is 35 minutes, the third set time period is 30 minutes, and the fourth set time period is 30 minutes.
In this embodiment, the first set external loop temperature ranges from-4 ℃ to-6 ℃, and the second set external loop temperature ranges from-10 ℃ to-12 ℃. As a preferable design of this embodiment, the first set outer ring temperature is-5 deg.C and the second set outer ring temperature is-11 deg.C. In particular, the present invention relates to a method for producing,
when the following conditions are met: the duration t1 that outdoor heat exchanger coil pipe temperature Te is less than or equal to-2 ℃ reaches 5 minutes, and the duration t2 that outer loop temperature Ta is less than or equal to 0 ℃ reaches 5 minutes, and the compressor is in operation, and when the air conditioner was in the mode of heating, according to outer loop temperature Ta control heating device's start-up operating time, specifically included:
(1) if Ta is more than or equal to minus 5 ℃ and less than or equal to 0 ℃, which indicates that the outer ring temperature Ta is lower, the heating device is started to operate for 25 minutes, then is closed for 35 minutes, and then the step S1 is returned. The heating device has short starting operation time and long closing time, thereby ensuring the defrosting effect and reducing the power consumption of the heating device.
(2) If Ta is more than or equal to 11 ℃ and less than or equal to 5 ℃ below zero, the heating device is started to operate for 30 minutes, then is closed for 30 minutes, and then returns to the step S1. The heating device has longer on-time and shorter off-time, thereby ensuring the defrosting effect and reducing the power consumption of the heating device.
(3) If Ta < -11 ℃, which indicates that the outer ring temperature Ta is very low, the heating apparatus is turned on and returns to step S1.
The range is selected by setting the outer ring temperature firstly and setting the outer ring temperature secondly, so that the design of the starting operation time of the heating device through the refinement of the outer ring temperature is realized, the defrosting effect is ensured, and the power consumption of the heating device is avoided to be larger.
As a preferable design of this embodiment, after step S4, in order to continue to maintain the defrosting effect, the control method further includes the following steps, as shown in fig. 2.
Step S5: duration t1 and duration t2 are cleared; the timer is restarted, and after the time is set, step S6 is executed.
Step S6: judging whether the following conditions are met: the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time, the duration t2 that the temperature Ta of the outer ring is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode.
If the four conditions are not met, at least one of the four conditions is not met, the heating device is kept closed; and returns to step S5.
If the above four conditions are satisfied, step S7 is executed: controlling the starting operation time of the heating device according to the outer ring temperature Ta, which specifically comprises the following steps:
s71: if the first set outer ring temperature is less than or equal to Ta and less than or equal to the set outer ring temperature low value, which indicates that the outer ring temperature Ta is lower, the heating device is started to operate for a first set time period, then is closed for a second set time period, and then the step S5 is returned. The heating device has short starting operation time and long closing time, thereby ensuring the defrosting effect and reducing the power consumption of the heating device.
S72: if the second set outer ring temperature is less than or equal to Ta and less than the first set outer ring temperature, which indicates that the outer ring temperature Ta is lower, the heating device is started to operate for a third set time period, then the heating device is closed for a fourth set time period, and then the step S5 is returned. The heating device has short starting operation time and long closing time, thereby ensuring the defrosting effect and reducing the power consumption of the heating device.
S73: if Ta < the second set outer ring temperature, indicating that the outer ring temperature Ta is very low, the heating apparatus is turned on and operated, and step S8 is performed.
Step S8: duration t3 and duration t4 are cleared; the timer is restarted, and after the time is set, step S9 is executed.
Step S9: judging whether the following conditions are met: the duration t3 that the temperature Te of the coil of the outdoor heat exchanger is more than or equal to the high value of the set coil temperature reaches the set time, or the duration t4 that the temperature Ta of the outer ring is more than or equal to the high value of the set outer ring temperature reaches the set time, or the compressor stops running, or the air conditioner is in a non-heating mode.
If the four conditions are not met, the heating device keeps on running, and the step S8 is returned;
if at least one of the four conditions is satisfied, the process returns to step S4, i.e., the heating device is turned off.
Through the design steps S4-S8, after the heating device is turned off, in the non-defrosting mode, the starting condition and the starting operation time of the heating device can be controlled according to the conditions of the outer ring temperature Ta, the temperature Te of the coil of the outdoor heat exchanger and the like, so that the defrosting effect is strengthened, the frosting of the outdoor unit is avoided as much as possible, and the power consumption of the heating device is reduced.
In this example, the coil temperature high was set at 13 ℃ and the outer loop temperature high was set at 3 ℃. When the temperature Te of the coil pipe of the outdoor heat exchanger is more than or equal to 13 ℃ or the outer ring temperature Ta is more than or equal to 3 ℃, the frosting possibility of the outdoor heat exchanger is very small, so that the temperature Te is taken as a sufficient condition for closing the heating device.
Specifically, after the heating device is turned off in step S4, t1 and t2 are cleared to restart the timer, and after 5 minutes, the following conditions are satisfied: the duration t1 that outdoor heat exchanger coil pipe temperature Te is less than or equal to-2 ℃ reaches 5 minutes, and the duration t2 that outer loop temperature Ta is less than or equal to 0 ℃ reaches 5 minutes, and the compressor is in operation, and when the air conditioner was in the mode of heating, according to outer loop temperature Ta control heating device's start-up operating time, specifically included:
(1) if Ta is more than or equal to minus 5 ℃ and less than or equal to 0 ℃, which indicates that the outer ring temperature Ta is lower, the heating device is started to operate for 25 minutes, then is closed for 35 minutes, and then the step S5 is returned. The heating device has short starting operation time and long closing time, thereby ensuring the defrosting effect and reducing the power consumption of the heating device.
(2) If Ta is more than or equal to 11 ℃ and less than or equal to 5 ℃ below zero, the heating device is started to operate for 30 minutes, then is closed for 30 minutes, and then returns to the step S5. The heating device has longer on-time and shorter off-time, thereby ensuring the defrosting effect and reducing the power consumption of the heating device.
(3) If Ta is less than-11 ℃, the outer ring temperature Ta is very low, the heating device is started to operate, then t3 and t4 are cleared, the timing is restarted, and after 5 minutes, the following conditions are met: when the duration t3 of the temperature Te of the coil of the outdoor heat exchanger being more than or equal to 13 ℃ reaches 5 minutes, or the duration t4 of the outer ring temperature Ta being more than or equal to 3 ℃ reaches 5 minutes, or the compressor stops running, or the air conditioner is in a non-heating mode, the operation returns to S4, and the heating device is closed; if not, the process returns to S8.
Based on the design of the above-mentioned control method for heating and defrosting of the outdoor unit of the air conditioner, this embodiment further provides a control system for heating and defrosting of the outdoor unit of the air conditioner, in which a heating device is disposed on a chassis of the outdoor unit for heating the chassis, and the control system includes:
a first timing module for clearing the durations t1 and t 2; the timing is restarted.
The first judgment module is used for judging whether the following conditions are met: the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time, the duration t2 that the temperature Ta of the outer ring is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode.
The heating device control module is used for controlling the starting operation time of the heating device according to the outer ring temperature Ta, and specifically comprises: if the first set outer ring temperature is less than or equal to Ta and less than or equal to the set outer ring temperature low value, the heating device is started to operate for a first set time period, and then the heating device is closed for a second set time period; if the second set external ring temperature is less than or equal to Ta and less than the first set external ring temperature, the heating device is started to operate for a third set time period, and then the heating device is closed for a fourth set time period; if Ta is less than the second set outer ring temperature, the heating device is started to operate; the first set time period is less than the third set time period, and the second set time period is greater than the fourth set time period; for switching off the heating means.
The control system further comprises:
a second timing module for clearing the durations t3 and t 4; the timing is restarted.
The second judgment module is used for judging whether the following conditions are met: the duration t3 that the temperature Te of the coil of the outdoor heat exchanger is more than or equal to the high value of the set coil temperature reaches the set time, or the duration t4 that the temperature Ta of the outer ring is more than or equal to the high value of the set outer ring temperature reaches the set time, or the compressor stops running, or the air conditioner is in a non-heating mode.
The working process of the heating and defrosting control system of the air conditioner outdoor unit has been described in detail in the above-mentioned heating and defrosting control method of the air conditioner outdoor unit, and is not described herein again.
In the heating and defrosting control system of the air conditioner outdoor unit of the embodiment, the heating device is started when the defrosting mode is started; after the defrosting mode is finished, delaying the set delay time, and then clearing the duration time t1 and the duration time t 2; restarting timing, after setting time, judging whether the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time or not, and the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode; if so, controlling the starting operation time of the heating device according to the outer ring temperature Ta; if not, the heating device is closed; the control method of the embodiment accurately controls the starting operation time of the heating device according to the size of the outer ring temperature Ta, not only can the defrosting effect be consolidated, but also the power consumption of the heating device can be reduced.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (10)
1. A heating and defrosting control method for an outdoor unit of an air conditioner is characterized in that a heating device is arranged on a chassis of the outdoor unit and used for heating the chassis, and the heating and defrosting control method comprises the following steps: the control method comprises the following steps:
starting a heating device when the defrosting mode is started;
after the defrosting mode is finished, delaying the set delay time, and then executing the step (1);
(1) the durations t1 and t2 are cleared; restarting timing, and executing the step (2) after setting time;
(2) judging whether the following conditions are met: the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time, the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode;
if yes, executing the step (3): controlling the starting operation time of the heating device according to the outer ring temperature Ta, which specifically comprises the following steps:
(31) if the first set outer ring temperature is less than or equal to Ta and less than or equal to the set outer ring temperature low value, the heating device is started to operate for a first set time period, then the heating device is closed for a second set time period, and then the step (1) is returned;
(32) if the second set external ring temperature is less than or equal to Ta and less than the first set external ring temperature, the heating device is started to operate for a third set time period, then the fourth set time period is closed, and the step (1) is returned;
(33) if Ta is less than the second set outer ring temperature, starting the heating device to operate, and returning to the step (1);
the first set time period is less than the third set time period, and the second set time period is greater than the fourth set time period;
if not, executing the step (4): the heating device is turned off.
2. The control method according to claim 1, characterized in that: after step (4), the method further comprises the steps of:
(5) the durations t1 and t2 are cleared; restarting timing, and executing the step (6) after setting time;
(6) judging whether the following conditions are met: the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time, the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode;
if not, keeping closing the heating device; returning to the step (5);
if yes, executing the step (7): controlling the starting operation time of the heating device according to the outer ring temperature Ta, which specifically comprises the following steps:
(71) if the first set outer ring temperature is less than or equal to Ta and less than or equal to the set outer ring temperature low value, the heating device is started to operate for a first set time period, then the heating device is closed for a second set time period, and then the step (5) is returned;
(72) if the second set external ring temperature is less than or equal to Ta and less than the first set external ring temperature, the heating device is started to operate for a third set time period, then the fourth set time period is closed, and then the step (5) is returned;
(73) if Ta is less than the second set outer ring temperature, starting the heating device to operate, and executing the step (8);
(8) the durations t3 and t4 are cleared; restarting timing, and executing the step (9) after setting time;
(9) judging whether the following conditions are met: the duration t3 that the temperature Te of the coil of the outdoor heat exchanger is more than or equal to the high value of the set coil temperature reaches the set time, or the duration t4 that the outer ring temperature Ta is more than or equal to the high value of the set outer ring temperature reaches the set time, or the compressor stops running, or the air conditioner is in a non-heating mode;
if not, returning to the step (8);
if yes, returning to the step (4).
3. The control method according to claim 1, characterized in that: the value range of the set delay time is 8 minutes to 12 minutes.
4. The control method according to claim 1 or 2, characterized in that: the value range of the set time is 4-6 minutes.
5. The control method according to claim 1 or 2, characterized in that: the low value of the coil temperature is set to be-2 ℃, and the low value of the external ring temperature is set to be 0 ℃.
6. The control method according to claim 1 or 2, characterized in that: the first set external loop temperature ranges from-4 ℃ to-6 ℃, and the second set external loop temperature ranges from-10 ℃ to-12 ℃.
7. The control method according to claim 1 or 2, characterized in that: the value range of the first set time period is 23-27 minutes, the value range of the second set time period is 33-37 minutes, the value range of the third set time period is 28-32 minutes, and the value range of the fourth set time period is 28-32 minutes.
8. The control method according to claim 2, characterized in that: the coil temperature rise was set at 13 ℃ and the external loop temperature rise was set at 3 ℃.
9. The utility model provides an air condensing units heating defrost control system, is provided with heating device on the off-premises station chassis for the heating chassis, its characterized in that: the control system includes:
a first timing module for clearing the durations t1 and t 2; restarting timing;
the first judgment module is used for judging whether the following conditions are met: the duration t1 that the temperature Te of the coil of the outdoor heat exchanger is less than or equal to the low value of the temperature of the set coil reaches the set time, the duration t2 that the outer ring temperature Ta is less than or equal to the low value of the temperature of the set outer ring reaches the set time, and the compressor is in operation and the air conditioner is in a heating mode;
the heating device control module is used for controlling the starting operation time of the heating device according to the outer ring temperature Ta, and specifically comprises: if the first set outer ring temperature is less than or equal to Ta and less than or equal to the set outer ring temperature low value, the heating device is started to operate for a first set time period, and then the heating device is closed for a second set time period; if the second set external ring temperature is less than or equal to Ta and less than the first set external ring temperature, the heating device is started to operate for a third set time period, and then the heating device is closed for a fourth set time period; if Ta is less than the second set outer ring temperature, the heating device is started to operate; the first set time period is less than the third set time period, and the second set time period is greater than the fourth set time period; for switching off the heating means.
10. The control system of claim 9, wherein: the control system further comprises:
a second timing module for clearing the durations t3 and t 4; restarting timing;
the second judgment module is used for judging whether the following conditions are met: the duration t3 that the temperature Te of the coil of the outdoor heat exchanger is more than or equal to the high value of the set coil temperature reaches the set time, or the duration t4 that the temperature Ta of the outer ring is more than or equal to the high value of the set outer ring temperature reaches the set time, or the compressor stops running, or the air conditioner is in a non-heating mode.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811360200.2A CN109631234B (en) | 2018-11-15 | 2018-11-15 | Heating and defrosting control method and system for outdoor unit of air conditioner |
| PCT/CN2019/107638 WO2020098389A1 (en) | 2018-11-15 | 2019-09-25 | Heating and defrosting control method and system for air conditioner outdoor unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811360200.2A CN109631234B (en) | 2018-11-15 | 2018-11-15 | Heating and defrosting control method and system for outdoor unit of air conditioner |
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| CN109631234A CN109631234A (en) | 2019-04-16 |
| CN109631234B true CN109631234B (en) | 2021-06-22 |
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| CN109631234B (en) * | 2018-11-15 | 2021-06-22 | 青岛海尔空调电子有限公司 | Heating and defrosting control method and system for outdoor unit of air conditioner |
| CN110469983B (en) * | 2019-07-26 | 2022-01-21 | 青岛海尔空调器有限总公司 | Control method and device for defrosting of air conditioner and air conditioner |
| CN110542149A (en) * | 2019-08-24 | 2019-12-06 | 珠海格力电器股份有限公司 | defrosting control method for air conditioning system and air conditioning system |
| CN112212466B (en) * | 2020-10-21 | 2022-03-08 | 广东积微科技有限公司 | Control method and control device for chassis heater of air conditioner outdoor unit and air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101303185A (en) * | 2008-05-22 | 2008-11-12 | 宁波奥克斯电气有限公司 | Defrosting method for heat pump type air conditioner |
| CN103822327B (en) * | 2013-10-29 | 2016-04-20 | 广东科龙空调器有限公司 | A kind of transducer air conditioning electric heating controlling method |
| CN105674519A (en) * | 2014-11-17 | 2016-06-15 | 青岛海尔空调器有限总公司 | Air conditioning system and defrosting control method |
| CN105987484B (en) * | 2015-02-28 | 2019-01-11 | 青岛海尔空调器有限总公司 | Defrosting control method and system when the frequent high temperature-proof of air-conditioning heating is protected |
| JP6346122B2 (en) * | 2015-04-23 | 2018-06-20 | 株式会社コロナ | Hot water heating system |
| CN106369759B (en) * | 2016-09-29 | 2019-11-01 | 广东美的制冷设备有限公司 | Defrosting control method, controller and air-conditioning |
| CN106594962B (en) * | 2016-10-27 | 2019-07-23 | 广东美的制冷设备有限公司 | Air conditioner defrosting control method, controller and air conditioner |
| CN106765950A (en) * | 2016-12-23 | 2017-05-31 | 广东美的暖通设备有限公司 | The control method of air-conditioning heating system, control device and air-conditioner |
| CN107014035B (en) * | 2017-03-29 | 2020-07-07 | 青岛海尔空调电子有限公司 | Defrosting control method and device of air conditioner |
| CN109631234B (en) * | 2018-11-15 | 2021-06-22 | 青岛海尔空调电子有限公司 | Heating and defrosting control method and system for outdoor unit of air conditioner |
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| WO2020098389A1 (en) | 2020-05-22 |
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Effective date of registration: 20210531 Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. |
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Effective date of registration: 20210825 Address after: 230001 No. 1, No. 2 and No. 3 of Haier Innovation Industrial Park, 3456 Shixin Road, Hefei Economic and Technological Development Zone, Anhui Province Patentee after: HEFEI HAIER AIR CONDITIONING ELECTRONIC Co.,Ltd. Patentee after: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Patentee after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Patentee before: QINGDAO HAIER AIR-CONDITIONING ELECTRONIC Co.,Ltd. Patentee before: Haier Smart Home Co., Ltd. |