CN112797576A - High-temperature refrigeration air conditioner control method - Google Patents

High-temperature refrigeration air conditioner control method Download PDF

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Publication number
CN112797576A
CN112797576A CN202011567686.4A CN202011567686A CN112797576A CN 112797576 A CN112797576 A CN 112797576A CN 202011567686 A CN202011567686 A CN 202011567686A CN 112797576 A CN112797576 A CN 112797576A
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Prior art keywords
air conditioner
temperature
compressor
running state
heat exchanger
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CN202011567686.4A
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CN112797576B (en
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张文天
肖开国
田裕兴
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • 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)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Thermal Sciences (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application relates to a control method of a high-temperature refrigeration air conditioner. The method comprises the following steps: determining whether the current operation state of the air conditioner meets the first air conditioner operation state or not according to the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor; if the first air conditioner running state is met, determining whether the current running state of the air conditioner meets a second air conditioner running state or not according to the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor; and if the second air conditioner running state is met, reducing the frequency of the compressor. The scheme that this application provided, through outdoor side heat exchanger coil pipe temperature or compressor exhaust temperature adjustment air conditioner operating frequency, can guarantee that the air conditioner can not receive the influence at extreme temperature ambient temperature under, temperature regulation's ability, for example under refrigerated demand, still can maintain or increase refrigeration effect.

Description

High-temperature refrigeration air conditioner control method
Technical Field
The application relates to the technical field of air conditioners, in particular to a control method of a high-temperature refrigeration air conditioner.
Background
Summer is the season of high use of the air conditioner, while hot summer also presents challenges to the cooling performance of the air conditioner. Generally, as the outdoor ambient temperature increases, the high pressure of the air conditioner gradually increases. Generally, the air conditioning system is shut down to protect the air conditioner when the outdoor ambient temperature is too high, but this way seriously affects the user experience. Because the higher the outdoor ambient temperature, the more the user needs the air conditioner to cool to ensure that the room is cool.
When the air conditioner works in a high-load state in summer, the reliable refrigerating operation of the air conditioner is difficult to realize, and the problem that the compressor cannot normally operate or even be damaged due to high-temperature overload protection triggered by an over-high load often occurs. In the prior art, an air conditioner cannot normally work in a high-temperature state, for example, the air conditioner is in a cooling mode, and the cooling effect is affected.
Disclosure of Invention
In order to overcome the problems in the prior art, the application provides a control method of a high-temperature refrigeration air conditioner, so that the air conditioner can maintain or increase the refrigeration effect at the limit temperature environment temperature.
In order to achieve the purpose, the invention adopts the following scheme:
a high-temperature refrigeration air conditioner control method comprises the following steps:
step 1, detecting the outdoor environment temperature of an air conditioner, the temperature of a coil of an outdoor heat exchanger and the exhaust temperature of a compressor;
step 2, determining whether the current operation state of the air conditioner meets a first air conditioner operation state or not according to the outdoor environment temperature, the temperature of the outdoor side heat exchanger coil and the exhaust temperature of the compressor; if the first air conditioner running state is met, executing the step 3; the first air conditioner running state is a first critical state that the frequency of the compressor can be continuously increased;
step 3, determining whether the current running state of the air conditioner meets a second air conditioner running state or not according to the outdoor environment temperature, the temperature of the outdoor side heat exchanger coil and the exhaust temperature of the compressor; if the second air conditioner running state is not met, returning to execute the step 2; if the second air conditioner running state is met, executing the step 4; the second air conditioner running state is a second critical state that the temperature of the coil of the outdoor side heat exchanger or the exhaust temperature of the compressor can not be increased any more;
and 4, reducing the frequency of the compressor.
In one embodiment of the present application, after determining whether the current operating state of the air conditioner satisfies the first air conditioner operating state according to the outdoor environment temperature, the outdoor side heat exchanger coil temperature and the compressor discharge temperature, the method further includes:
if the first air conditioner running state is not met, executing the step 5;
and 5, increasing the frequency of the compressor to a limit.
In one embodiment of the present application, if the second air conditioner operation state is satisfied, the method further includes the steps of, while reducing the compressor frequency:
and 6, increasing the rotating speed of the outer fan.
In an embodiment of the present application, before increasing the rotation speed of the outer fan, the method further includes:
judging whether the conditions that p- (p-30) is more than or equal to 0.5 or y- (y-30) is more than or equal to 0.5 are met;
if the conditions that p- (p-30) is more than or equal to 0.5 or y- (y-30) is more than or equal to 0.5 are met, executing the step 6, and increasing the rotating speed of the outer fan according to 50rpm/min until R is out-of-range max;
if the conditions that p- (p-30) is more than or equal to 0.5 or y- (y-30) is more than or equal to 0.5 are not met, the external fan maintains the current situation and does not act;
wherein p is the current outdoor side heat exchanger coil temperature, p-30 is the outdoor side heat exchanger coil temperature detected before 30s, y is the current compressor exhaust temperature, y-30 is the compressor exhaust temperature detected before 30s, and R abversion max is the maximum rotating speed that the outer fan can reach.
In one embodiment of the present application, determining whether a current operating state of an air conditioner satisfies a first air conditioner operating state based on an outdoor ambient temperature, an outdoor side heat exchanger coil temperature, and a compressor discharge temperature includes:
determining the current running state of the air conditioner as a first air conditioner running state according to the condition A;
condition a: p is more than or equal to a + (h-X) or y is more than or equal to b + (h-X);
wherein p is the outdoor side heat exchanger coil temperature, h is the outdoor ambient temperature, y is the compressor discharge temperature, a is a constant, b is a constant, and X is a constant.
In one embodiment of the present application, determining whether the current operating state of the air conditioner satisfies the second air conditioner operating state based on the outdoor ambient temperature, the outdoor side heat exchanger coil temperature, and the compressor discharge temperature includes:
determining the current operation state of the air conditioner as a second air conditioner operation state according to the condition B;
condition B: p is more than or equal to a + (h-X) +2 or y is more than or equal to b + (h-X) + 2.
In one embodiment of the present application, after the second air conditioner operation state is satisfied, the method further includes:
step 7, determining whether the current running state of the air conditioner meets the running state of a third air conditioner or not according to the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor; if the third air conditioner running state is met, simultaneously executing the step 4 and the step 6;
the third air conditioner running state is a third critical state for limiting the temperature of the coil of the outdoor side heat exchanger or the exhaust temperature of the compressor to continuously rise.
In one embodiment of the present application, determining whether the current operating state of the air conditioner satisfies a third air conditioner operating state based on the outdoor ambient temperature, the outdoor side heat exchanger coil temperature, and the compressor discharge temperature includes:
determining the current operation state of the air conditioner as a third air conditioner operation state according to the condition C;
condition C: p is more than or equal to a + (h-X) +4 or y is more than or equal to b + (h-X) + 4.
In one embodiment of the present application, after the third air conditioner operation state is satisfied, the method further includes:
step 8, determining whether the current running state of the air conditioner meets the running state of a fourth air conditioner or not according to the outdoor environment temperature, the temperature of a coil of an outdoor side heat exchanger and the exhaust temperature of a compressor; if the fourth air conditioner running state is met, executing the step 9;
the fourth air conditioner running state is a limit state for judging whether the compressor needs to be stopped or not;
and 9, stopping the compressor.
In one embodiment of the present application, determining whether the current operating state of the air conditioner satisfies a fourth air conditioner operating state based on the outdoor ambient temperature, the outdoor side heat exchanger coil temperature, and the compressor discharge temperature includes:
determining the current operation state of the air conditioner as a fourth air conditioner operation state according to the condition D;
condition D: p is more than or equal to a + (h-X) +6 or y is more than or equal to b + (h-X) +6 or I is more than or equal to c;
wherein, I is the current of the air conditioner, and c is a constant.
The technical scheme provided by the application can comprise the following beneficial effects:
the method comprises the steps of determining the current running state of the air conditioner according to the detected outdoor environment temperature of the air conditioner, the coil temperature of an outdoor side heat exchanger and the exhaust temperature of a compressor, and adjusting the running frequency of the air conditioner according to the coil temperature of the outdoor side heat exchanger or the exhaust temperature of the compressor if the current running state of the air conditioner is in a limit environment state, so that the temperature adjusting capacity of the air conditioner can not be influenced under certain limit temperature environment temperatures.
Drawings
The foregoing and other objects, features and advantages of the application will be apparent from the following more particular descriptions of exemplary embodiments of the application, as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the application.
FIG. 1 is a schematic flow chart of a control method for a high-temperature refrigeration air conditioner according to an embodiment of the present application;
fig. 2 is a schematic flow chart of a high-temperature refrigeration air-conditioning control method according to a second embodiment of the present application;
fig. 3 is a schematic flow chart of a high-temperature refrigeration air-conditioning control method according to a third embodiment of the present application;
fig. 4 is a schematic flow chart of a high-temperature refrigeration air-conditioning control method according to a fourth embodiment of the present application.
Detailed Description
Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It should be understood that although the terms "first," "second," "third," etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first critical state may also be referred to as the second critical state, and similarly, the second critical state may also be referred to as the first critical state, without departing from the scope of the present application. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
Example 1
During the refrigeration use of the air conditioner, the high pressure of the air conditioner is generally gradually increased along with the increase of the outdoor environment temperature. Generally, the air conditioning system is shut down to protect the air conditioner when the outdoor ambient temperature is too high, but this way seriously affects the user experience. Because the higher the outdoor ambient temperature, the more the user needs the air conditioner to cool to ensure that the room is cool. In the prior art, an air conditioner cannot normally work in a high-temperature state, for example, the air conditioner is in a cooling mode, and the cooling effect is affected.
In view of the above problems, embodiments of the present application provide a method for controlling a high-temperature refrigeration air conditioner, so that the air conditioner can maintain or increase a refrigeration effect at a temperature limit.
The technical solutions of the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a high-temperature refrigeration air-conditioning control method according to an embodiment of the present application.
Referring to fig. 1, a flow chart of a high-temperature refrigeration air conditioner control method in the embodiment of the present application is schematically illustrated, and the method includes:
101 detects the outdoor ambient temperature of the air conditioner, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor.
In the embodiment of the application, the temperature conditions of all parameters are accurately obtained by detecting the outdoor environment temperature of the air conditioner, the coil temperature of the outdoor side heat exchanger and the exhaust temperature of the compressor.
It can be understood that, in the embodiment of the present application, the temperature sensor may be used to continuously detect the outdoor environment temperature, the outdoor side heat exchanger coil temperature and the compressor exhaust temperature, and the value is taken once every 1s, so as to achieve the purpose of real-time monitoring and precise control. Through continuous detection and real-time monitoring of the running state change of the air conditioner, accurate control is achieved, the refrigerating capacity of the air conditioner is adjusted in time, and continuous effective refrigerating running of the air conditioner is guaranteed.
102, determining whether the current running state of the air conditioner meets the first air conditioner running state or not according to the outdoor environment temperature, the temperature of a coil of an outdoor side heat exchanger and the exhaust temperature of a compressor; if the first air conditioner operation state is not satisfied, executing step 103; if the first air conditioner operation state is satisfied, step 104 is executed.
In the embodiment of the application, the current running state of the air conditioner is accurately judged by combining the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature range of the compressor.
Further, according to the condition a, the current operation state of the air conditioner may be determined as the first air conditioner operation state.
Condition a: p is more than or equal to a + (h-X) or y is more than or equal to b + (h-X);
the first air conditioner running state is a first critical state that the frequency of the compressor can be continuously increased; p is the outdoor side heat exchanger coil temperature, h is the outdoor ambient temperature, y is the compressor discharge temperature, a is a constant, b is a constant, and X is a constant; the value of (h-X) is constant positive, when the value of (h-X) is negative, the value of the system is 0, and the condition is suitable for all operations in the technical scheme of the application.
103 raise the compressor frequency to a limit.
In the embodiment of the application, if the first air-conditioning operation state is not met, the frequency of the compressor is increased by 1Hz/s until Fmax; where Fmax is the highest frequency that the compressor can reach.
104, determining whether the current running state of the air conditioner meets the running state of a second air conditioner according to the outdoor environment temperature, the temperature of a coil of an outdoor side heat exchanger and the exhaust temperature of a compressor; if the second air conditioner running state is met, executing step 105; if the second air conditioner operation state is not satisfied, the process returns to step 102.
105 reduce the compressor frequency.
In the embodiment of the application, if the first air conditioner running state is met, whether the current running state of the air conditioner is the second air conditioner running state or not is accurately judged by combining the outdoor environment temperature, the outdoor side heat exchanger coil temperature and the range of the compressor exhaust temperature, and whether the current running state of the air conditioner is in the limit environment or not is determined.
Further, according to the condition B, it may be determined that the current operation state of the air conditioner is the second air conditioner operation state.
Condition B: p is more than or equal to a + (h-X) +2 or y is more than or equal to b + (h-X) + 2;
the second air conditioner running state is a second critical state that the temperature of the coil of the outdoor side heat exchanger or the exhaust temperature of the compressor cannot be increased any more.
In the embodiment of the application, if the current running state of the air conditioner meets the second running state of the air conditioner, the frequency of the compressor is reduced according to 1Hz/s until Fmin; fmin is the lowest frequency that the compressor can reach.
In the technical scheme of this application, through according to detecting the outdoor ambient temperature of air conditioner, outdoor side heat exchanger coil pipe temperature and compressor exhaust temperature, confirm the current running state of air conditioner, if the current running state of air conditioner is under the extreme environment state, then adjust air conditioner operating frequency through outdoor side heat exchanger coil pipe temperature or compressor exhaust temperature, guarantee that the air conditioner is under some extreme temperature ambient temperature, temperature regulation's ability can also not receive the influence, for example under refrigerated demand, it reaches a critical state (if, second air conditioner running state) to detect compressor exhaust temperature, compressor exhaust temperature can not climb again under this critical state, but still can maintain or increase refrigeration effect through regulation and control compressor frequency, satisfy the demand that the user set up the temperature.
Example 2
In this embodiment, when the current operation state of the air conditioner is set to the cooling mode, if the current operation state of the air conditioner satisfies the second air conditioner operation state, the frequency of the compressor may be reduced, and the temperature of the coil of the outdoor heat exchanger or the temperature of the exhaust gas of the compressor may be limited by increasing the rotation speed of the external air blower.
Fig. 2 is a schematic flow chart of a high-temperature refrigeration air-conditioning control method according to a second embodiment of the present application. As shown in fig. 2, the method includes:
the 201 detects the outdoor ambient temperature of the air conditioner, the coil temperature of the outdoor side heat exchanger and the exhaust temperature of the compressor.
202, determining whether the current running state of the air conditioner meets the first air conditioner running state according to the outdoor environment temperature, the outdoor side heat exchanger coil temperature and the compressor exhaust temperature. If the first air conditioner operation state is not satisfied, go to step 203; if the first air conditioner operation state is satisfied, step 204 is executed.
203 raise the compressor frequency to a limit.
In the embodiment of the present application, the contents of step 201, step 202, and step 203 are the same as the contents of step 101, step 102, and step 103 in embodiment 1, and are not described herein again.
204, determining whether the current operation state of the air conditioner meets the second air conditioner operation state according to the outdoor environment temperature, the temperature of the outdoor side heat exchanger coil and the exhaust temperature of the compressor. If the second air conditioner running state is not met, returning to execute the step 202; if the second air conditioner operation state is satisfied, step 205 is simultaneously performed.
In this embodiment, according to the condition B, it may be determined that the current operation state of the air conditioner is the second air conditioner operation state.
Condition B: p is more than or equal to a + (h-X) +2 or y is more than or equal to b + (h-X) + 2;
the second air conditioner running state is a second critical state that the temperature of the coil of the outdoor side heat exchanger or the exhaust temperature of the compressor cannot be increased any more.
205 and simultaneously judging whether the conditions of p- (p-30) being more than or equal to 0.5 or y- (y-30) being more than or equal to 0.5 are met. If the conditions of p- (p-30) ≧ 0.5 or y- (y-30) ≧ 0.5 are satisfied, step 206 is performed. If the conditions of p- (p-30) ≧ 0.5 or y- (y-30) ≧ 0.5 are not satisfied, step 207 is performed.
And p is the current temperature of the coil of the outdoor heat exchanger, p-30 is the temperature of the coil of the outdoor heat exchanger detected before 30s, y is the current exhaust temperature of the compressor, and y-30 is the exhaust temperature of the compressor detected before 30 s.
In the embodiment of the application, whether the condition that the rotating speed of the outer fan needs to be increased is accurately judged according to the current temperature of the coil of the outdoor heat exchanger and the temperature of the coil of the outdoor heat exchanger detected before 30s or according to the current exhaust temperature of the compressor and the exhaust temperature of the compressor detected before 30 s.
206 increase the outer fan speed.
In the embodiment of the application, if the second air conditioner operation state is satisfied and the conditions that p- (p-30) is more than or equal to 0.5 or y- (y-30) is more than or equal to 0.5 are simultaneously satisfied, the rotating speed of the external fan can be increased, and the rotating speed of the external fan is increased according to 50rpm/min until R external rotation max.
Wherein, R outer rotor max is the maximum rotating speed which can be reached by the outer fan.
The external fan 207 remains inactive.
In the embodiment of the application, the external fan maintains the current state without action on the assumption that the condition of p- (p-30) ≧ 0.5 or y- (y-30) ≧ 0.5 is not satisfied.
In the technical scheme of the application, if the temperature of the coil of the outdoor side heat exchanger or the exhaust temperature of the compressor is detected to reach a critical state (such as a second air conditioner running state), the frequency of the compressor can be reduced, and meanwhile, the temperature of the coil of the outdoor side heat exchanger or the exhaust temperature of the compressor can be limited to continue rising by increasing the rotating speed of the outer fan.
Example 3
In this embodiment of the application, assuming that the current operating state of the air conditioner satisfies the second air conditioner operating state, after satisfying the second air conditioner operating state, the method further includes: and a third air conditioner operation state.
Fig. 3 is a schematic flow chart of a high-temperature refrigeration air-conditioning control method according to a third embodiment of the present application. As shown in fig. 3, the method includes:
301 detects the air conditioning outdoor ambient temperature, the outdoor side heat exchanger coil temperature and the compressor discharge temperature.
302 determining whether the current operating state of the air conditioner satisfies a first air conditioner operating state according to the outdoor environment temperature, the outdoor side heat exchanger coil temperature and the compressor discharge temperature. If the first air conditioner running state is not met, executing step 303; if the first air conditioner operation state is satisfied, step 304 is performed.
303 raise the compressor frequency to a limit.
304 determining whether the current operating state of the air conditioner meets a second air conditioner operating state according to the outdoor environment temperature, the outdoor side heat exchanger coil temperature and the compressor exhaust temperature. If the second air conditioner running state is not met, returning to execute the step 302; if the second air conditioner operation state is satisfied, step 305 is performed.
305 reduces the compressor frequency.
In the embodiment of the present application, the contents of step 301 to step 305 are the same as the contents of step 101 to step 105 in embodiment 1, and are not described herein again.
And 306 determining whether the current running state of the air conditioner meets the running state of a third air conditioner according to the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor. If the third air conditioner operation state is not satisfied, executing step 307; if the third air conditioner operation state is satisfied, step 308 is performed.
In the embodiment of the application, whether the current running state of the air conditioner is the third air conditioner running state or not is accurately judged by combining the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the range of the exhaust temperature of the compressor, and whether the current running state of the air conditioner is in another limit environment or not is determined.
Further, the current operation state of the air conditioner may be determined as the third air conditioner operation state according to the condition C.
Condition C: p is more than or equal to a + (h-X) +4 or y is more than or equal to b + (h-X) + 4;
and the third air conditioner running state is a third critical state for limiting the temperature of the coil of the outdoor side heat exchanger or the exhaust temperature of the compressor to continuously increase.
307 maintains the current state inactive.
In the embodiment of the present application, if the current operating state of the air conditioner does not satisfy the third air conditioner operating state, the current state is maintained and the air conditioner is not operated.
Optionally, the outdoor ambient temperature, the outdoor side heat exchanger coil temperature and the compressor discharge temperature are detected continuously, and the value is taken once every 1s, and if the satisfied condition changes, the condition is changed from unsatisfied to satisfied, and then the operation can be performed.
308 reduce the frequency of the compressor and increase the outer fan speed.
In the embodiment of the application, if the current running state of the air conditioner meets the running state of the third air conditioner, the frequency of the compressor is rapidly reduced according to 1Hz/0.5s until Fmin; fmin is the lowest frequency that the compressor can reach.
And the rotating speed of the outer fan is increased. The rotating speed of the outer fan is increased according to 50rpm/min until R outer rotating max; the R outer rotor max is the maximum rotating speed which can be reached by the outer fan.
According to the embodiment of the application, the temperature of the coil pipe of the outdoor side heat exchanger or the exhaust temperature of the compressor is continuously increased by reducing the frequency of the compressor and increasing the rotating speed of the outer fan.
In this application technical scheme, because outdoor ambient temperature too high can lead to whole air conditioner's outdoor side heat exchanger coil pipe temperature and compressor exhaust temperature also can rise thereupon, and then can cause the problem that can not move because pressure is too high. Under the refrigeration requirement, whether the current running state of the air conditioner is in the limit environment can be accurately judged by combining the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the range of the exhaust temperature of the compressor. If the temperature of the coil of the outdoor heat exchanger or the exhaust temperature of the compressor is detected to reach a critical state (such as a third air conditioner running state), the running frequency of the air conditioner and the rotating speed of the outer fan can be adjusted according to the temperature of the coil of the outdoor heat exchanger or the exhaust temperature of the compressor, and the running reliability of the air conditioner in a high-temperature environment is further improved.
Example 4
In this embodiment of the application, assuming that the current operating state of the air conditioner satisfies the third air conditioner operating state, after satisfying the third air conditioner operating state, the method further includes: and a fourth air conditioner operation state.
Fig. 4 is a flowchart illustrating a high-temperature refrigeration air-conditioning control method according to a fourth embodiment of the present application. As shown in fig. 4, the method includes:
401 detects the air conditioner outdoor ambient temperature, the outdoor side heat exchanger coil temperature and the compressor discharge temperature.
402 determining whether the current operating state of the air conditioner satisfies a first air conditioner operating state according to the outdoor environment temperature, the outdoor side heat exchanger coil temperature and the compressor discharge temperature. If the first air conditioner operation state is not satisfied, executing step 403; if the first air conditioner operation state is satisfied, step 404 is performed.
403 raises the compressor frequency to a limit.
404 determining whether the current operating state of the air conditioner satisfies a second air conditioner operating state according to the outdoor environment temperature, the outdoor side heat exchanger coil temperature and the compressor discharge temperature. If the second air conditioner running state is not met, returning to execute the step 402; if the second air conditioner operation state is satisfied, step 405 is performed.
405 reducing the compressor frequency.
In the embodiment of the present application, the contents of steps 401 to 405 are the same as the contents of steps 101 to 105 in embodiment 1, and are not described herein again.
406 determining whether the current operating state of the air conditioner satisfies a third air conditioner operating state based on the outdoor ambient temperature, the outdoor side heat exchanger coil temperature, and the compressor discharge temperature. If the third air conditioner operation state is not satisfied, performing step 407; if the third air conditioner operation state is satisfied, step 408 is performed.
407 maintains the current state inactive.
408 reduce the frequency of the compressor and increase the outer fan speed.
In the present embodiment, the contents of step 406 to step 408 are the same as the contents of step 306 to step 308 in embodiment 3, and are not described herein again.
409, determining whether the current running state of the air conditioner meets the running state of the fourth air conditioner according to the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor. If the fourth air conditioner operation state is not satisfied, performing step 410; if the fourth air conditioner operation state is satisfied, step 411 is performed.
In the embodiment of the application, whether the current running state of the air conditioner is the fourth air conditioner running state or not is accurately judged by combining the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the range of the exhaust temperature of the compressor.
Further, according to the condition D, it may be determined that the current operation state of the air conditioner is the fourth air conditioner operation state.
Condition D: p is more than or equal to a + (h-X) +6 or y is more than or equal to b + (h-X) +6 or I is more than or equal to c;
and the fourth air conditioner running state is a limit state for judging whether the compressor needs to be stopped or not.
410 maintains the current state inactive.
In this embodiment of the present application, if the current operating state of the air conditioner does not satisfy the fourth operating state of the air conditioner, the current state is maintained and the air conditioner does not operate.
411 the compressor is stopped.
In the embodiment of the present application, the compressor is stopped on the assumption that the current operation state of the air conditioner satisfies the fourth air conditioner operation state.
Optionally, after the compressor is stopped, the system may continuously detect parameters such as an outdoor ambient temperature, an outdoor side heat exchanger coil temperature, a compressor discharge temperature, and an air conditioner current, and if a satisfied condition changes, the compressor may resume operation.
According to the control method for the high-temperature refrigeration air conditioner, whether the current running state of the air conditioner meets the fourth air conditioner running state or not is accurately judged by combining parameters such as outdoor environment temperature, outdoor side heat exchanger coil temperature, compressor exhaust temperature and air conditioner current. If the temperature of the coil of the outdoor heat exchanger, the exhaust temperature of the compressor or the current is detected to reach the limit state (the fourth air conditioner running state) that the compressor needs to be controlled to stop, the compressor can be stopped to run, otherwise, the current state is maintained to be not operated, and the air conditioner is guaranteed to run in the maximum refrigeration state. Meanwhile, the refrigerating capacity of the air conditioner is controlled and adjusted in time by continuously detecting the state change of the air conditioner, the continuous effective refrigerating operation of the air conditioner is guaranteed, and the requirement of a user for setting the temperature is met.
Having described embodiments of the present application, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A high-temperature refrigeration air conditioner control method is characterized by comprising the following steps:
step 1, detecting the outdoor environment temperature of an air conditioner, the temperature of a coil of an outdoor heat exchanger and the exhaust temperature of a compressor;
step 2, determining whether the current operation state of the air conditioner meets a first air conditioner operation state or not according to the outdoor environment temperature, the temperature of the outdoor side heat exchanger coil and the exhaust temperature of the compressor; if the first air conditioner running state is met, executing the step 3; the first air conditioner running state is a first critical state that the frequency of the compressor can be continuously increased;
step 3, determining whether the current running state of the air conditioner meets a second air conditioner running state or not according to the outdoor environment temperature, the temperature of the outdoor side heat exchanger coil and the exhaust temperature of the compressor; if the second air conditioner running state is not met, returning to execute the step 2; if the second air conditioner running state is met, executing the step 4; the second air conditioner running state is a second critical state that the temperature of the coil of the outdoor side heat exchanger or the exhaust temperature of the compressor can not be increased any more;
and 4, reducing the frequency of the compressor.
2. A high temperature refrigeration air conditioner control method as claimed in claim 1,
after determining whether the current operation state of the air conditioner meets the operation state of the first air conditioner according to the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor, the method further comprises the following steps:
if the first air conditioner running state is not met, executing the step 5;
and 5, increasing the frequency of the compressor to a limit.
3. A high temperature refrigeration air conditioner control method as claimed in claim 1,
if the second air conditioner running state is met, the frequency of the compressor is reduced, and the method further comprises the following steps:
and 6, increasing the rotating speed of the outer fan.
4. A high temperature refrigeration air conditioner control method as claimed in claim 3,
before increasing outer fan rotational speed, still include:
judging whether the conditions that p- (p-30) is more than or equal to 0.5 or y- (y-30) is more than or equal to 0.5 are met;
if the conditions that p- (p-30) is more than or equal to 0.5 or y- (y-30) is more than or equal to 0.5 are met, executing the step 6, and increasing the rotating speed of the outer fan according to 50rpm/min until R is out-of-range max;
if the conditions that p- (p-30) is more than or equal to 0.5 or y- (y-30) is more than or equal to 0.5 are not met, the outer fan maintains the current situation and does not act;
the method comprises the following steps of detecting the temperature of an outdoor heat exchanger coil pipe, detecting the temperature of the outdoor heat exchanger coil pipe before 30s, detecting the exhaust temperature of a compressor before 30s, detecting the exhaust temperature of the compressor before 30s, and detecting the maximum rotating speed of an outer fan by using the R outer rotating max.
5. A high temperature refrigeration air conditioner control method as claimed in claim 1,
the method for determining whether the current operation state of the air conditioner meets the operation state of a first air conditioner or not according to the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor comprises the following steps:
determining the current running state of the air conditioner as a first air conditioner running state according to the condition A;
condition a: p is more than or equal to a + (h-X) or y is more than or equal to b + (h-X);
wherein p is the outdoor side heat exchanger coil temperature, h is the outdoor ambient temperature, y is the compressor discharge temperature, a is a constant, b is a constant, X is a constant.
6. A high temperature refrigeration air conditioner control method as claimed in claim 1,
determining whether the current running state of the air conditioner meets the running state of a second air conditioner according to the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor, wherein the determining comprises the following steps:
determining the current operation state of the air conditioner as a second air conditioner operation state according to the condition B;
condition B: p is more than or equal to a + (h-X) +2 or y is more than or equal to b + (h-X) + 2.
7. A method as claimed in claim 1, further comprising, after said second air conditioning operation condition is satisfied:
step 7, determining whether the current running state of the air conditioner meets a third air conditioner running state or not according to the outdoor environment temperature, the temperature of the outdoor side heat exchanger coil and the exhaust temperature of the compressor; if the third air conditioner running state is met, simultaneously executing the step 4 and the step 6;
the third air conditioner running state is a third critical state for limiting the temperature of the coil of the outdoor side heat exchanger or the exhaust temperature of the compressor to continuously rise.
8. A high temperature refrigeration air conditioner control method as recited in claim 7,
determining whether the current running state of the air conditioner meets a third air conditioner running state according to the outdoor environment temperature, the temperature of the outdoor side heat exchanger coil and the exhaust temperature of the compressor, wherein the determining comprises the following steps:
determining the current operation state of the air conditioner as a third air conditioner operation state according to the condition C;
condition C: p is more than or equal to a + (h-X) +4 or y is more than or equal to b + (h-X) + 4.
9. A method as claimed in claim 7, further comprising the following steps if the third air conditioning operation state is satisfied:
step 8, determining whether the current running state of the air conditioner meets the running state of a fourth air conditioner or not according to the outdoor environment temperature, the temperature of the coil of the outdoor side heat exchanger and the exhaust temperature of the compressor; if the fourth air conditioner running state is met, executing the step 9;
the fourth air conditioner running state is a limit state for judging whether the compressor needs to be stopped or not;
step 9, the compressor is stopped.
10. A high temperature refrigeration air conditioner control method as claimed in claim 9,
determining whether the current running state of the air conditioner meets a fourth air conditioner running state according to the outdoor environment temperature, the temperature of the outdoor side heat exchanger coil and the exhaust temperature of the compressor, wherein the determining comprises the following steps:
determining the current operation state of the air conditioner as a fourth air conditioner operation state according to the condition D;
condition D: p is more than or equal to a + (h-X) +6 or y is more than or equal to b + (h-X) +6 or I is more than or equal to c
Wherein, I is the current of the air conditioner, and c is a constant.
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