CN114216213B - Defrosting control method of air conditioner and air conditioner - Google Patents
Defrosting control method of air conditioner and air conditioner Download PDFInfo
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- CN114216213B CN114216213B CN202111509872.7A CN202111509872A CN114216213B CN 114216213 B CN114216213 B CN 114216213B CN 202111509872 A CN202111509872 A CN 202111509872A CN 114216213 B CN114216213 B CN 114216213B
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- 238000010257 thawing Methods 0.000 title claims abstract description 61
- 238000000034 method Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 46
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 claims description 33
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
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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
- 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
-
- 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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
- F24F2110/22—Humidity of the outside air
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the technical field of defrosting, and particularly relates to a defrosting control method of an air conditioner and the air conditioner, wherein the control method comprises the following steps: and in the heating operation of the air conditioner, whether the defrosting starting condition is achieved is determined according to the average increase rate of the water vapor partial pressure difference of the outdoor heat exchanger. According to the invention, the temperature of the outer pipe of the air conditioner is not taken as a judgment condition, but directly according to the frosting principle, when the outdoor unit is frosted, the temperature of the outer pipe is reduced, so that the partial pressure difference of the water vapor is rapidly increased, therefore, the defrosting time can be determined according to the average increase rate of the partial pressure difference of the water vapor, the defrosting is started when the most suitable defrosting time is reached, and the use experience of a user is improved.
Description
Technical Field
The invention belongs to the technical field of defrosting, and particularly relates to a defrosting control method of an air conditioner and the air conditioner.
Background
In cold winter, the outdoor may frost due to low heating temperature, and in the current control, the judgment condition of a fixed heating time and the outer tube temperature is generally used to judge whether defrosting should be performed. The judgment condition is not intelligent enough, the artificial partition judgment is adopted, the frosting principle is not attached, and if the defrosting time is earlier, the defrosting is frequently repeated within a period of time when the user uses the defrosting, so that the user experience is influenced; if the defrosting time is later, the indoor heating capacity is poorer and poorer, the defrosting time is longer, and the user experience is also influenced.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a defrosting control method of an air conditioner and the air conditioner.
A first object of the present invention is to provide a defrosting control method of an air conditioner, including:
and during the heating operation of the air conditioner, whether a condition for starting defrosting is achieved is determined according to the average increase rate of the water vapor partial pressure difference of the outdoor heat exchanger.
Further optionally, the determining whether the condition for starting defrosting is reached according to the average increase rate of the water vapor partial pressure difference of the outdoor heat exchanger comprises
Calculating the real-time partial pressure difference delta P of the water vapor of the outdoor heat exchanger;
every t 0 Mean value E of the partial pressure difference Δ P of the water vapor over the time calculation period t n ；
Calculating the current mean value E n With the previous mean value E n-1 Δ E = E, said Δ E = E n -E n-1 ；
And determining whether a condition for starting defrosting is met or not according to the difference value delta E.
Further optionally, said determining whether a condition for initiating defrosting is reached based on said difference Δ E comprises
Comparing the difference Delta E with a set difference Delta E Setting up The size of (d);
when Δ E ≧ Δ E is satisfied Setting up And judging that the defrosting starting condition is reached.
Further optionally, the calculating a real-time partial pressure difference Δ Ρ of water vapor of the outdoor heat exchanger comprises
Acquiring real-time temperature value and humidity value of outdoor environment, and calculating real-time outdoor environment water vapor partial pressure value P 1 ；
Acquiring real-time temperature value and humidity value of air near the outer pipe of the air conditioner, and calculating water vapor partial pressure value P of air near the real-time outer pipe temperature 2 ；
Calculating the partial pressure difference of water vapor, delta P, wherein delta P = P 1 -P 2 。
Further optionally, the compressor starts t 1 After time, every t 0 Mean value E of partial pressure difference of water vapor in set time length t of time calculation n Wherein t1 is more than or equal to t ≧ t 0 。
Further optionally, the obtaining of the real-time temperature value of the air near the outer tube of the air conditioner is obtaining of a real-time temperature value of the outer tube of the air conditioner.
Further optionally, after a defrosting starting condition is reached, the air conditioner is controlled to enter defrosting, defrosting is finished after a defrosting finishing condition is reached, and the defrosting starting condition is judged again.
A second object of the present invention is to provide a control apparatus of an air conditioner, which includes one or more processors and a non-transitory computer-readable storage medium storing program instructions, when the one or more processors execute the program instructions, the one or more processors are configured to implement the method of any one of the above.
A third object of the invention proposes a non-transitory computer-readable storage medium on which program instructions are stored, which program instructions, when executed by one or more processors, are adapted to implement the method according to any of the above.
A fourth object of the present invention is to provide an air conditioner, which employs any one of the above methods, or includes the above control device, or has a non-transitory computer readable storage medium as described above.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
according to the invention, the temperature of the outer pipe of the air conditioner is not taken as a judgment condition, but directly according to the frosting principle, when the outdoor unit is frosted, the temperature of the outer pipe is reduced, so that the partial pressure difference delta P of the water vapor is rapidly increased, and the defrosting time can be determined according to the average increase rate of the partial pressure difference of the water vapor under different working conditions, so that the air conditioner can start defrosting at the most appropriate time, and the user experience is provided.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention to the proper form disclosed herein. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
FIG. 1: is a control flow diagram of an embodiment of the invention;
FIG. 2: is a control flow diagram of a specific implementation of an embodiment of the present invention.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In the description of the present invention, it should be noted that the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "contacting," and "communicating" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides a defrosting control method of an air conditioner, which is a control flow chart shown in fig. 1 and comprises steps S1-S2, wherein the control flow chart comprises the following steps:
s1, heating operation of an air conditioner;
and S2, determining whether the defrosting starting condition is met according to the average increase rate of the partial pressure difference of the water vapor of the outdoor heat exchanger.
In this embodiment, since the frosting process is caused by the desublimation of the water vapor in the outdoor environment near the outer tube, the magnitude of the partial pressure difference of the water vapor in the outer tube of the outdoor heat exchanger represents the magnitude of the frosting phase change driving force. When the outer pipe of the outdoor heat exchanger frosts, the temperature of the outer pipe is reduced, so that the partial pressure difference delta P of the steam is rapidly increased, and the judgment is more accurate by taking the increase rate of the partial pressure difference delta P of the steam as a judgment standard for starting defrosting.
Further optionally, step S2 includes S21 to S24, where:
s21, calculating the real-time partial pressure difference delta P of the water vapor of the outdoor heat exchanger;
s22 every t 0 Mean value E of the partial pressure difference Δ P of the water vapor over the time calculation period t n ；
S23, calculating the current mean value E n With the previous mean value E n-1 Δ E = E, said Δ E = E n -E n-1 ；
And S24, determining whether a condition for starting defrosting is met or not according to the difference value delta E.
In this embodiment, when the air condensing units frosted more thickly, the off-premises station heat transfer condition worsened, and outer tube temperature can descend, and outer tube temperature's decline can make water vapor partial pressure difference Δ P rise rapidly, and this embodiment utilizes water vapor partial pressure difference Δ P to judge at the average growth rate of a period of time whether get into immediately and change the frost, and difference Δ E can reflect the average growth rate of water vapor partial pressure difference. Because the air conditioner needs a period of time from starting operation to entering a system with relatively stable parameters, and then the water vapor partial pressureThe force difference Δ P will remain stable for a period of time, and therefore, it is preferred at compressor start-up t 1 After a time, at which point the system reaches steady state, then every t 0 Mean value E of partial pressure difference of water vapor in set time length t of time calculation n Wherein t1 is more than or equal to t ≧ t 0 When the temperature of the air conditioner outer pipe begins to fall, the partial pressure difference delta P of the water vapor begins to rise rapidly, and whether defrosting is started immediately is judged according to the average increase rate of the partial pressure difference delta P of the water vapor in a period of time.
Further optionally, step S24 includes S241-S242, wherein
S241, comparing the difference value delta E with a set difference value delta E Setting up The size of (d);
s242, when the condition that delta E is more than or equal to delta E is met Setting up And judging that the defrosting starting condition is reached.
In this embodiment, a determination condition is formed by using the average increase rate of the partial pressure difference of water vapor in a period of time to reach a certain value (for example, 0.05 pa/s) to determine whether defrosting is started immediately, and the difference Δ E can reflect the average increase rate of the partial pressure difference of water vapor, when Δ E is greater than or equal to Δ E Setting up When the condition for starting defrosting is reached, judging that the defrosting condition is reached, and when delta E is less than delta E Setting up And maintaining the heating operation of the air conditioner.
In one embodiment, as shown in the flowchart of fig. 2, after the compressor is operated for t1 time (for example, 15 min), the average value of the partial pressure difference Δ Ρ of the water vapor after 5min is recorded as E0, the average value of the partial pressure difference Δ Ρ of the water vapor after 5min is calculated once after 1min is calculated as E1, and the difference Δ E = E1-E0 is calculated. Determining the value of Δ E and the set mean value Δ E Setting up When Δ E is larger than Δ E Setting up Defrosting is carried out, otherwise, heating operation is continued; then let E 0 ＝E 1 And record the next E 1 A value of (D), calculating E 1 -E 0 Then continue to judge Δ E and the set mean value Δ E Setting up And (c) so on. When the condition of starting defrosting is met, the air conditioner is controlled to enter defrosting, defrosting is finished when the condition of finishing defrosting is met, and the starting defrosting condition is judged again, namely the starting defrosting condition is determined again according to the average increase rate of the partial pressure difference of the water vapor of the outdoor heat exchangerAnd determining whether the condition of starting defrosting is achieved. As shown in the flowchart of fig. 2, when the air conditioner reaches the condition of finishing defrosting, the air conditioner performs heating operation again and returns to perform the first step.
Further optionally, step S21 includes S211 to S213, wherein
S211, acquiring a real-time temperature value and a real-time humidity value of the outdoor environment, and calculating a real-time outdoor environment water vapor partial pressure value P 1 ；
S212, acquiring real-time temperature value and humidity value of air near the outer pipe of the air conditioner, and calculating water vapor partial pressure value P of air near the real-time outer pipe temperature 2 ；
S213, calculating the partial pressure difference delta P of the water vapor, wherein delta P = P 1 -P 2 。
In this embodiment, the real-time temperature value and the real-time humidity value of the outdoor environment can be detected by the temperature sensor and the humidity sensor which are arranged on the outdoor unit shell. And a stable rear sensor and a humidity sensor are arranged on the outer pipe of the outdoor heat exchanger to detect the temperature and the humidity of the air near the outdoor heat exchanger, and the temperature of the air near the outer pipe is approximately equal to the temperature of the outer pipe, so that the temperature of the air near the outer pipe can be directly determined by detecting the real-time temperature of the outer pipe.
In this embodiment, there are various ways to calculate the partial pressure value of the water vapor, and one implementable way is as follows:
partial pressure of water vapor
Wherein Ps is the saturated pressure of water vapor,
relative humidity of air (detectable by a humidity sensor);
the water vapor saturation pressure Ps can be calculated in various ways, for example, according to the Goff equation, and will not be described in detail herein.
Ps＝e f(T) ；
f(T)＝a/T+b+c·T+d·T 2 +e·T 3 +f·T 4 +g·lnT；
T＝273.15+t；
Wherein t is the temperature of the air dry bulb, and a, b, c, d, e, f and g are formula coefficients;
the present embodiment also proposes a control device of an air conditioner, which includes one or more processors and a non-transitory computer-readable storage medium storing program instructions, when the one or more processors execute the program instructions, the one or more processors are configured to implement the method of any one of the above.
The present embodiments also propose a non-transitory computer-readable storage medium having stored thereon program instructions for implementing the method according to any one of the above when the program instructions are executed by one or more processors.
The present embodiment also proposes an air conditioner that employs the method of any one of the above, or includes the control device described above, or has a non-transitory computer-readable storage medium described above.
Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the present invention.
Claims (8)
1. A defrosting control method of an air conditioner is characterized by comprising the following steps:
in the heating operation of the air conditioner, whether a condition for starting defrosting is achieved is determined according to the average increase rate of the water vapor partial pressure difference of the outdoor heat exchanger, and the condition comprises the following steps: calculating the real-time partial pressure difference delta P of the water vapor of the outdoor heat exchanger;
every t 0 Time calculation durationMean value E of partial pressure difference Δ P of water vapor within t n ；
Calculating the current mean value E n And the previous mean value E n-1 Δ E = E, said Δ E = E n -E n-1 ；
Determining whether a condition for starting defrosting is met or not according to the difference value delta E, and comparing the difference value delta E with a set difference value delta E Setting up The size of (d);
when Δ E ≧ Δ E is satisfied Setting up And judging that the defrosting starting condition is reached.
2. The defrosting control method of an air conditioner according to claim 1, wherein the calculating the real-time partial pressure difference Δ P of water vapor of the outdoor heat exchanger includes
Acquiring real-time temperature value and humidity value of outdoor environment, and calculating real-time outdoor environment water vapor partial pressure value P 1 ；
Obtaining real-time temperature value and humidity value of air near the outer pipe of the air conditioner, and calculating water vapor partial pressure value P of the air near the real-time outer pipe temperature 2 ；
Calculating partial pressure difference of water vapor Δ P, wherein Δ P = P 1 -P 2 。
3. The defrosting control method of an air conditioner according to claim 2,
compressor start-up t 1 After time, every t 0 Mean value E of partial pressure difference of water vapor in set time length t of time calculation n Wherein t1 is more than or equal to t ≧ t 0 。
4. The defrosting control method of an air conditioner according to claim 2, wherein the obtaining of the real-time temperature value of the air near the outer pipe of the air conditioner is obtaining of the real-time temperature value of the outer pipe of the air conditioner.
5. The defrosting control method of an air conditioner according to claim 1, wherein the air conditioner is controlled to enter defrosting when a defrosting start condition is reached, defrosting is finished when a defrosting finish condition is reached, and the defrosting start condition is determined again.
6. A control apparatus of an air conditioner, characterized in that it comprises one or more processors and a non-transitory computer-readable storage medium storing program instructions, when the program instructions are executed by the one or more processors, the one or more processors being configured to implement the method according to any one of claims 1-5.
7. A non-transitory computer-readable storage medium having stored thereon program instructions which, when executed by one or more processors, are to implement the method of any one of claims 1-5.
8. An air conditioner, characterized in that it employs the method of any one of claims 1-5, or comprises the control device of claim 6, or has a non-transitory computer-readable storage medium according to claim 7.
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