CN108613329B - Variable frequency air conditioner and control method thereof - Google Patents
Variable frequency air conditioner and control method thereof Download PDFInfo
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- CN108613329B CN108613329B CN201810402550.4A CN201810402550A CN108613329B CN 108613329 B CN108613329 B CN 108613329B CN 201810402550 A CN201810402550 A CN 201810402550A CN 108613329 B CN108613329 B CN 108613329B
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- 238000000034 method Methods 0.000 title claims abstract description 39
- 239000003507 refrigerant Substances 0.000 claims abstract description 55
- 230000001960 triggered effect Effects 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 abstract description 13
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- 241001391944 Commicarpus scandens Species 0.000 abstract description 2
- 238000001816 cooling Methods 0.000 description 27
- 230000006870 function Effects 0.000 description 11
- 238000011217 control strategy Methods 0.000 description 8
- 239000007788 liquid Substances 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000009471 action Effects 0.000 description 3
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- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000004781 supercooling Methods 0.000 description 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
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- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
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- 238000005057 refrigeration Methods 0.000 description 2
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- 230000003287 optical effect Effects 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
- F24F11/62—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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- 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
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
-
- 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
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- 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)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention discloses a variable frequency air conditioner and a control method thereof, relates to the field of air conditioners and solves the problem that the air conditioner is easy to break down due to the fact that in the prior art, the system pressure in the operation process of the variable frequency air conditioner is changed greatly due to the change of operation parameters, and the refrigerant is added too much or too little. The variable frequency air conditioner comprises a control module, a parameter setting module and a parameter setting module, wherein the control module is used for receiving a parameter setting mode starting signal; and controlling the variable frequency air conditioner to operate according to the parameter setting mode starting signal, wherein the step of controlling the variable frequency air conditioner to operate according to the parameter setting mode comprises the following steps: the compressor is controlled to operate at a fixed frequency, the indoor fan is controlled to operate at a first preset rotating speed, the outdoor fan is controlled to operate at a second preset rotating speed, and the throttling device is controlled to operate at a preset opening degree. The method is used for the control process of the variable frequency air conditioner.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a variable frequency air conditioner and a control method thereof.
Background
After the air conditioner is installed or operated for a period of time, a refrigerant (also called a refrigerant) may need to be added for various reasons, the traditional fixed-frequency air conditioner product is fixedly operated at 50Hz, and the general method of maintenance personnel is as follows: according to the indoor temperature and the pressure of the low-pressure valve, whether the air-conditioning refrigerant is normal or not can be judged very easily. Due to the fact that the operation frequency of the variable frequency air conditioner is changed, and the highest operation frequency and the lowest operation frequency of different products are different, for the variable frequency air conditioner with electronic expansion, the opening degree of the electronic expansion valve is also changed in the process of adding the refrigerant, so that the system pressure change in the operation process is very large, and the quantity of the refrigerant needing to be added cannot be accurately judged.
Therefore, the conventional inverter air conditioner detects the refrigerant leakage, and the general operation mode of filling the refrigerant is as follows: it is a relatively standard practice to discharge and evacuate the remaining refrigerant in the system and add the refrigerant again according to the weight of the refrigerant specified by the nameplate, but if the refrigerant leaks little, this situation not only increases the difficulty of operation, especially at some high altitude or places where the air conditioner is inconvenient to operate, but also increases the loss of refrigerant and pollutes the environment.
Another prior art way of charging the refrigerant is: and adding a refrigerant into the variable frequency air conditioner by a maintenance worker according to experience according to the pressure condition of the fixed frequency air conditioner in the 50Hz running state. In this case, the inverter air conditioner can also operate for refrigeration in a short period of time due to simple operation. However, since the operation frequency of the compressor is constantly changed during the operation of the inverter air conditioner, the amount of refrigerant to be added is varied and unstable according to the operation pressure of the fixed frequency air conditioner, and for example, if the compressor of the inverter air conditioner is in a high frequency operation when the refrigerant is added, the refrigerant addition is easily excessive, and if the compressor of the inverter air conditioner is in a low frequency operation when the refrigerant is added, the refrigerant addition is easily insufficient. The method for adding the refrigerant has larger deviation of the amount of the added refrigerant, so that the failure rate of the air conditioner is increased after long-term operation, and the after-sale maintenance cost is increased.
Disclosure of Invention
The embodiment of the invention provides an inverter air conditioner and a control method thereof, and aims to solve the problem that in the prior art, the inverter air conditioner is easy to break down due to the fact that too much or too little refrigerant is added possibly because the system pressure in the operation process is changed greatly due to the change of operation parameters.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides an inverter air conditioner, including: the refrigerant loop formed by compressor, outdoor heat exchanger, throttle device and indoor heat exchanger, indoor fan and outdoor fan. The variable frequency air conditioner also comprises a control module for receiving a start signal of the fixed parameter mode; and controlling the variable frequency air conditioner to operate according to the parameter setting mode starting signal, wherein the step of controlling the variable frequency air conditioner to operate according to the parameter setting mode comprises the following steps: and controlling the compressor to operate at a fixed frequency, the indoor fan to operate at a first preset rotating speed, the outdoor fan to operate at a second preset rotating speed and the throttling device to operate at a preset opening degree.
In a second aspect, an embodiment of the present invention provides a method for controlling an inverter air conditioner, where the method includes: receiving a start signal of a fixed parameter mode; and controlling the variable frequency air conditioner to operate according to the parameter setting mode starting signal. The control of the variable frequency air conditioner to operate according to the parameter setting mode comprises the following steps: and controlling a compressor of the variable frequency air conditioner to operate at a fixed frequency, an indoor fan to operate at a first preset rotating speed, an outdoor fan to operate at a second preset rotating speed and a throttling device to operate at a preset opening degree.
According to the variable frequency air conditioner and the control method thereof provided by the embodiment of the invention, the indoor fan, the outdoor fan, the compressor and the throttling device of the variable frequency air conditioner are respectively controlled to be in the set parameter values, namely, the parameter values of the parts of the variable frequency air conditioner are fixed, so that the system operation pressure of the variable frequency air conditioner in the operation process is in a stable state, and the addition of a refrigerant with a proper value to the variable frequency air conditioner is facilitated, and the problem that the variable frequency air conditioner is easy to malfunction due to the fact that the system pressure in the operation process is changed greatly due to the change of the operation parameters in the prior art, and the refrigerant is added too much or too little is solved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of an inverter air conditioner according to an embodiment of the present invention;
FIG. 2 schematically illustrates an inverter air conditioner provided by an embodiment of the present invention;
fig. 3 is a flowchart of an inverter air conditioner control method according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and the like are to be understood broadly, and may be, for example, fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any combination thereof. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", and the like are used to distinguish the same items or similar items with basically the same functions or actions, and those skilled in the art can understand that the words "first", "second", and the like do not limit the quantity and execution order.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Embodiment I, variable frequency air conditioner
An embodiment of the present invention provides an inverter air conditioner, and referring to fig. 1 and fig. 2, the inverter air conditioner 1 may include: a refrigerant circuit composed of a compressor 11, an outdoor heat exchanger 12, a throttle device 13, and an indoor heat exchanger 14, which are connected in this order, and an outdoor fan 15 and an indoor fan 16. The variable frequency air conditioner 1 provided by the embodiment of the invention further comprises a control module 17, which is used for receiving a start signal of the fixed parameter mode; and controlling the variable frequency air conditioner 1 to operate according to the parameter setting mode starting signal, wherein the controlling the variable frequency air conditioner 1 to operate according to the parameter setting mode may include: the compressor 11 is controlled to operate at a fixed frequency, the indoor fan 16 is controlled to operate at a first preset rotation speed, the outdoor fan 15 is controlled to operate at a second preset rotation speed, and the throttling device 13 is controlled to operate at a preset opening degree.
It should be noted that the outdoor heat exchanger of the air conditioner is used as a radiator, i.e. a condenser, during the cooling operation, and becomes a heat absorber, i.e. an evaporator, during the heating operation; accordingly, the indoor heat exchanger of the air conditioner functions as a heat absorber, i.e., an evaporator, in a cooling operation, and functions as a heat sink, i.e., a condenser, in a heating operation. The circulation process of the refrigerant (refer to the arrow direction in fig. 1) is described below by taking the air-conditioning cooling operation as an example.
When the air conditioner operates in a refrigerating mode, low-temperature low-pressure refrigerant gas is sucked by the compressor 11 and then is pressurized to be changed into high-temperature high-pressure refrigerant gas, the high-temperature high-pressure refrigerant gas releases heat in the outdoor heat exchanger 12 (the heat is condensed by the condenser) to be changed into medium-temperature high-pressure liquid (the heat is taken away by outdoor circulating air), the medium-temperature high-pressure liquid is throttled and depressurized by the throttling device 13 to be changed into low-temperature low-pressure liquid, the low-temperature low-pressure liquid refrigerant absorbs heat in the indoor heat exchanger 14 and is evaporated to be changed into low-temperature low-pressure gas (the indoor air is cooled by the surface of the heat.
During the cooling operation, the heat of the outdoor heat exchanger 12 (i.e., the condenser) is blown out by an outdoor fan 15 (e.g., an axial fan) at a constant rotational speed to the outside, and the cold of the indoor heat exchanger 14 (i.e., the evaporator) is blown out by an indoor fan 16 (e.g., a centrifugal fan or a cross-flow fan with multiple blades and low noise) at a constant rotational speed to the inside. The rotation speed of each of the indoor fan and the outdoor fan refers to the rotation speed of a motor (shown as M in fig. 2) in the fan.
The throttling device 13 may be used for throttling and depressurizing and adjusting the flow rate, for example, in the above refrigerant circuit, the medium-temperature high-pressure liquid is throttled and depressurized by the throttling device 13 and then changed into low-temperature low-pressure liquid, and then the refrigerant liquid absorbs heat in the indoor heat exchanger 14 (an evaporator during the cooling operation) to achieve the cooling effect. It should be noted that the throttle device 13 in the embodiment of the present invention is a throttle device with an adjustable opening degree.
Alternatively, the throttle device 13 may be an electronic expansion valve. The opening degree of the electronic expansion valve may be changed according to an electric signal (e.g., voltage or current) applied to the electronic expansion valve, so as to adjust the amount of the liquid supplied. And the opening degree of the electronic expansion valve can be changed according to the change of the superheat degree of the outlet of the evaporator, so as to prevent the phenomenon of insufficient utilization of the area of the evaporator. Specifically, the superheat degree signal may be acquired by a temperature sensor and a pressure sensor provided at the outlet of the evaporator (the evaporation temperature may be acquired by a temperature sensor provided in the middle of the evaporator), the opening degree of the expansion valve may be controlled by feedback adjustment, and the superheat degree may be controlled within a target range in a wide evaporation temperature range.
In the refrigerant circuit, the higher the operating frequency of the compressor 11, the higher the rotation speed of the indoor fan 16 and the outdoor fan 15 is, the larger the opening degree of the throttling device 13 is, that is, the operating frequency of the compressor 11, the rotation speed of the indoor fan 16, the rotation speed of the outdoor fan 15, and the opening degree of the throttling device 13 are restricted with each other, and the circulating operation of the refrigerant circuit is affected together. For example, in the case of an inverter air conditioner, for example, to generate a rated cooling capacity, the compressor needs to operate at a certain operating frequency, at which a certain rotating speed of the indoor fan needs to be ensured in order to ensure a certain degree of superheat at the outlet of the evaporator, and a certain rotating speed of the outdoor fan needs to be ensured in order to ensure a certain degree of supercooling at the outlet of the outdoor condenser, and in order to ensure that the air conditioner operates at a lower power under such a cooling capacity, the optimal effect of adjusting the opening degree of the electronic expansion valve needs to be achieved.
As an alternative, in the present embodiment, the fixed frequency of the compressor 11 of the inverter air conditioner 1 in the fixed reference mode may be the minimum frequency of the compressor 11 on the premise that the absolute value of the difference between the cooling capacity generated by the inverter air conditioner 1 and the rated cooling capacity is smaller than or equal to the first threshold value. The first preset rotation speed of the indoor fan 16 may refer to a rotation speed capable of ensuring that the degree of superheat at the outlet of the indoor heat exchanger 14 (i.e., the evaporator) is within a preset range. The second preset rotation speed of the outdoor fan 15 may refer to a rotation speed capable of ensuring the supercooling degree at the outlet of the outdoor heat exchanger 12 (i.e., the condenser) within a preset range.
Alternatively, the fixed frequency of the compressor 11, the first preset rotation speed of the indoor fan 16, the second preset rotation speed of the outdoor fan 15, and the preset opening degree of the throttling device 13 may be determined by adjusting based on the rated cooling capacity in combination with other factors (e.g., the degree of superheat, the degree of supercooling, the power, etc.). Specifically, the optimum or preferred values of the parameter values of the compressor 11, the indoor fan 16, the outdoor fan 15 and the throttling device 13 are all provided on the premise of ensuring that at least the rated refrigerating capacity can be generated. It should be noted that there may be some difference between the preferred parameter values of different air conditioners. On the premise of ensuring that at least rated refrigerating capacity can be obtained, multiple sets of parameter values of each part can be obtained after debugging, and one set of parameter values with the lowest or lower frequency (lower means lower than a set value) of the compressor can be selected as preset parameter values for the fixed-parameter mode operation, for example, the fixed frequency of the compressor 11 is 55hz, the preset rotating speed of the indoor fan 16 is 1000 revolutions, the preset rotating speed of the outdoor fan 15 is 800 revolutions, and the preset opening degree of the throttling device 13 is 220.
As an alternative, the absolute value of the difference between the refrigerating capacity generated by the inverter air conditioner 1 operating in the parameter-fixed mode and the rated refrigerating capacity of the inverter air conditioner 1 is less than or equal to the first threshold. For example, if the first threshold is 50W, the deviation between the cooling capacity generated by the operation in the fixed reference mode and the rated cooling capacity may be in the threshold range of [ -50W, 50W ]. In other words, the inverter air conditioner 1 operates in the constant parameter mode to generate a cooling capacity close to or equal to the rated cooling capacity of the inverter air conditioner 1. It should be noted that the first threshold may be determined according to actual use requirements, and the invention is not limited thereto.
Illustratively, the control module 17 controls the inverter air conditioner 1 to operate in the fixed-reference mode according to the fixed-reference mode start signal, for example, controls the compressor 11 to operate at a fixed frequency of 55hz, the indoor fan 16 to operate at a preset rotation speed of 1000 rpm, the outdoor fan 15 to operate at a preset rotation speed of 800 rpm, and the throttling device 13 to operate at a preset opening degree of 220 rpm, in which case the frequency is converted into the fixed frequency, and the generated cooling capacity can reach 3550W, which is approximately 3500W. Therefore, the parts can run according to the fixed parameters, so that a certain refrigerating capacity can be generated, the running pressure of the system is in a stable state, and the addition operation of the refrigerant is facilitated.
The refrigerating capacity refers to the sum of heat removed from a closed space, a room or an area in unit time when the air conditioner operates in a refrigerating mode, and the legal measurement unit is W (watt). The rated cooling capacity refers to the cooling capacity generated by the air conditioner under the rated working condition, and is generally marked on a nameplate of the air conditioner, for example, the rated cooling capacity is 3500W. It should be noted that the cooling capacity (in W) and the electric power (in W) are two concepts, and the two concepts represent the output power and the input power of the air conditioner, respectively.
As an alternative, the absolute value of the difference between the input power of the inverter air conditioner 1 and the rated input power of the inverter air conditioner 1 when the inverter air conditioner 1 operates in the fixed-parameter mode under the premise of generating the rated cooling capacity is less than or equal to the second threshold. For example, the second threshold value is 30W, and the deviation amount between the input power and the rated input power is in the threshold range of [ -30W, 30W ] under the condition that the rated cooling capacity is generated. In other words, the input power of the inverter air conditioner 1 operating in the constant reference mode under the premise of generating the rated cooling capacity is close to or equal to the rated input power of the inverter air conditioner 1. It should be noted that the second threshold may be determined according to actual use requirements, and the invention is not limited thereto.
Illustratively, in the case that the rated cooling capacity of the inverter air conditioner is 2600W and the rated input power is 750W, the control module 17 controls the compressor 11 to operate at a fixed frequency of 55hz, the indoor fan 16 to operate at a preset rotation speed of 1000 rpm, the outdoor fan 15 to operate at a preset rotation speed of 800 rpm, and the throttling device 13 to operate at a preset opening degree 220, in which case the inverter is changed into the fixed frequency, the air conditioner is capable of generating the cooling capacity of 2600W, and the consumed power (i.e., the input power) is 740W, which is close to the rated input power of 750W. Therefore, the variable frequency air conditioner operates according to the fixed parameter mode, so that a certain refrigerating capacity can be generated, the input power is lower, the system operation pressure is in a stable state, and the refrigerant adding operation is facilitated.
In the prior art, the operation frequency of the air conditioner compressor, the rotating speed of the indoor/outdoor fan and the opening degree of the electronic expansion valve are operated according to a certain algorithm, for example, the control is carried out according to the average change rate of the temperature, or the control is carried out according to the step number, the controlled factors (such as the exhaust temperature, the ambient temperature and the temperature of the heat exchanger pipeline) of the fixed frequency method are more, so that the frequency of the compressor, the rotating speed of the indoor/outdoor fan and the opening degree of the electronic expansion valve are not fixed, and the operation state of the parts is changed as long as a certain factor is changed. Compared with the prior art, the variable frequency air conditioner provided by the embodiment of the invention has the advantages that the running frequency of the compressor, the rotating speed of the indoor/outdoor fan and the opening degree of the electronic expansion valve are respectively controlled to be in the preset parameter values, so that the parts run according to the fixed parameters, the running pressure of the system is in a stable state, the phenomenon of excessive or insufficient addition of the refrigerant is avoided, the complex operation of evacuating the refrigerant and adding the refrigerant again in the prior art is not needed, and the maintenance operation of the air conditioner is simplified.
From the perspective of the air conditioner operating in heating mode, optionally, the absolute value of the difference between the heating capacity generated by the inverter air conditioner 1 operating in the fixed-parameter mode and the rated heating capacity of the inverter air conditioner is less than or equal to the first threshold. Optionally, the inverter air conditioner 1 operates in the fixed reference mode, and an absolute value of a difference between the input power and the rated input power of the inverter air conditioner 1 on the premise of generating the rated heating capacity is smaller than or equal to the second threshold. Also, the first threshold and the second threshold may be determined according to actual use requirements, and the invention is not limited.
Optionally, the control module 17 may be configured to receive a signal for indicating that a start key of the inverter air conditioner is triggered, and use the signal for indicating that the start key of the inverter air conditioner is triggered as a start signal of the inverter air conditioner. Illustratively, the fixed mode initiation key may be triggered by pressing, or may be triggered by touching. For example, the parameter setting mode start key may be disposed on a panel of the indoor unit of the air conditioner or on a remote controller. Optionally, a certain key (e.g., an emergency switch) may be arranged on a panel of the indoor unit as the parameter setting mode start key, or several keys (e.g., an air volume increasing key and an air volume increasing key used in combination, which may be referred to as a combination key) on the remote controller may be arranged as the parameter setting mode start key, and the parameter setting mode start key may be triggered by pressing the combination key at the same time. That is, when the refrigerant needs to be added or the maintenance is carried out, a single key or a combined key can be pressed or touched to start the parameter setting mode (namely, the frequency setting function is started), and convenience is provided for after-sale maintenance.
Optionally, the control module 17 may be further configured to, when the inverter air conditioner operates in the parameter setting mode, control the inverter air conditioner to exit the parameter setting mode if a signal that any key of the inverter air conditioner or a parameter setting mode exit key of the inverter air conditioner is triggered is received. Optionally, a) may be provided with a fixed-reference mode exit key, for example, the fixed-reference mode exit key may be provided on a panel of the indoor unit of the air conditioner or on a remote controller; or b) there may be no fixed mode exit key. Specifically, under the condition that a) a fixed-parameter mode exit key is arranged, the fixed-parameter mode exit key can be pressed or touched to exit the fixed-parameter mode; it should be noted that the fixed reference mode exit key and the fixed reference mode start key may be the same or different, that is, the start and exit functions of the fixed reference mode may be integrated into one key or separately provided to different keys, which is not specifically limited in this embodiment of the present invention. In the case of b) no fixed-parameter mode exit key, any key may be pressed or touched to enable exit of the fixed-parameter mode. That is, when the user wants to exit the parameter setting mode, the service person or the user may press an arbitrary key or an exit key.
Optionally, the control module 17 may be further configured to: and controlling the variable frequency air conditioner to exit the parameter setting mode under the condition that the running time length according to the parameter setting mode reaches the preset time length. That is, it can be set that the air conditioner will automatically exit the fixed parameter mode after running for N minutes. For example, the preset time duration may be set to, for example, 30 minutes, or 60 minutes, or 90 minutes, and once the time duration of the operation in the parameter setting mode reaches the preset time duration, the variable frequency air conditioner exits the parameter setting mode, so that the parameter setting mode can be automatically exited at a fixed time, and the situation that a maintenance person or a user forgets to exit the parameter setting mode is avoided.
Alternatively, referring to fig. 2, the control module 17 may include an indoor controller 171 and an outdoor controller 172. Specifically, the indoor controller 171 may be configured to receive the start signal of the fixed-reference mode, control the indoor fan 16 to operate at a preset rotation speed according to the start signal of the fixed-reference mode, and send an outdoor start command of the fixed-reference mode to the outdoor controller 172. The outdoor controller 172 may be configured to receive the outdoor parameter setting mode starting signal, and control the compressor 11 to operate at a fixed frequency, the outdoor fan 15 to operate at a preset rotation speed, and the throttle device 13 to operate at a preset opening degree according to the outdoor parameter setting mode starting signal.
Optionally, the indoor controller 171 stores an indoor control strategy for controlling the indoor fan, and the outdoor controller 172 stores an outdoor control strategy for controlling the compressor, the outdoor fan, and the throttling device, in which case, the indoor controller controls the indoor fan to operate at a preset rotation speed according to the indoor control strategy, and sends the start signal of the fixed-parameter mode to the outdoor controller, so that the outdoor controller controls the compressor, the outdoor fan, and the throttling device to operate at preset parameter values according to the outdoor control strategy.
Alternatively, the indoor controller 171 stores a control strategy for controlling the indoor fan, the compressor, the outdoor fan, and the throttling device, and in this case, the indoor controller 171 controls the indoor fan to operate at a preset rotation speed according to the control strategy for the indoor fan, and transmits a parameter-fixed mode start signal and the control strategy for the compressor, the outdoor fan, and the throttling device to the outdoor controller 172 to instruct the outdoor controller 172 to control the compressor 11, the outdoor fan 15, and the throttling device 13 to operate at preset parameter values, respectively, according to the control strategy.
When the refrigerant is actually added, a fluorine-filled hose can be connected with a refrigerant steel cylinder, a vacuum pressure gauge and a fluorine filling port to remove air in the hose, and then the refrigerant gas is filled by utilizing the pressure difference between the steel cylinder and a refrigeration system. Illustratively, the air conditioner is operated in a refrigerating high-speed air state, the low-pressure of a vacuum pressure gauge is observed while adding refrigerant at a process port of a low-pressure stop valve, and when the low pressure reaches a certain value (such as R22 reaches 0.65mpa) and is basically stable, a refrigerant steel cylinder valve is closed. In addition, factors influencing low-pressure such as the air temperature of the outdoor unit, the indoor cold load and the like can be simultaneously considered, the amount and the gauge pressure of the refrigerant can be finely adjusted, and the accurate addition of the refrigerant can be realized.
According to the variable frequency air conditioner and the control method thereof provided by the embodiment of the invention, the indoor fan, the outdoor fan, the compressor and the throttling device of the variable frequency air conditioner are respectively controlled to be in the set parameter values, namely, the parameter values of the parts of the variable frequency air conditioner are fixed, so that the system operation pressure of the variable frequency air conditioner in the operation process is in a stable state, and the addition of a refrigerant with a proper value to the variable frequency air conditioner is facilitated, and the problem that the variable frequency air conditioner is easy to malfunction due to the fact that the system pressure in the operation process is changed greatly due to the change of the operation parameters in the prior art, and the refrigerant is added too much or too little is solved.
Embodiment II, variable frequency air conditioner control method
Correspondingly, the embodiment of the invention provides a method for controlling the inverter air conditioner, and an execution main body of the method can be the inverter air conditioner or a control module in the inverter air conditioner. Referring to fig. 3, the inverter air conditioner control method may include:
and S101, receiving a fixed reference mode starting signal. Optionally, a signal for indicating that a start key of the inverter air conditioner is triggered is received as a start signal of the fixed-reference mode. Illustratively, a serviceman or user or the like may be triggered by pressing or touching the enter-mode start key.
S102, controlling the variable frequency air conditioner to operate according to the parameter setting mode starting signal, wherein the step of controlling the variable frequency air conditioner to operate according to the parameter setting mode comprises the following steps: and controlling a compressor of the variable frequency air conditioner to operate at a fixed frequency, an indoor fan to operate at a first preset rotating speed, an outdoor fan to operate at a second preset rotating speed and a throttling device to operate at a preset opening degree. That is, when the air conditioner needs to be maintained or a refrigerant needs to be added, the compressor of the inverter air conditioner is fixed at a certain operation frequency, and corresponding components such as an indoor/outdoor fan, an electronic expansion valve and the like are correspondingly in an optimal state, so that the operation pressure in the system is in a stable state, and the refrigerant adding operation is facilitated.
Alternatively, step S102 is performed by the indoor controller and the outdoor controller, respectively. Specifically, the indoor controller receives the start signal of the parameter setting mode, controls the indoor fan to operate at a first preset rotating speed according to the start signal of the parameter setting mode, and sends an outdoor parameter setting mode start instruction to the outdoor controller. And the outdoor controller controls the compressor to operate at a fixed frequency, the outdoor fan to operate at a second preset rotating speed and the throttling device to operate at a preset opening according to the outdoor parameter-determining mode starting signal.
Optionally, an absolute value of a difference between a cooling capacity or a heating capacity generated by the inverter air conditioner operating in the fixed-parameter mode and a rated cooling capacity or a rated heating capacity of the inverter air conditioner is less than or equal to a first threshold. It should be noted that the first threshold may be determined according to actual use requirements, and the invention is not limited thereto.
Optionally, step S101 may include: and receiving a signal for indicating that a start key of the inverter air conditioner is triggered, wherein the signal for indicating that the start key of the inverter air conditioner is triggered can be used as a start signal of the inverter air conditioner.
Optionally, the inverter air conditioner control method may further include:
and S103, executing S105 if receiving signals that any key of the variable frequency air conditioner and a fixed-parameter mode exit key of the variable frequency air conditioner are triggered under the condition that the variable frequency air conditioner operates according to the fixed-parameter mode.
Optionally, the inverter air conditioner control method may further include:
s104, judging whether the running time length according to the fixed reference mode reaches a preset time length or not, and executing S105 if the running time length according to the fixed reference mode reaches the preset time length; otherwise, continuing to count time.
And S105, controlling the variable frequency air conditioner to exit the parameter setting mode.
That is, when the fixed frequency function needs to be used (for example, a refrigerant is added or maintenance is performed), the fixed reference mode start key is pressed or touched to start the fixed reference mode (that is, the fixed frequency function is started), when the fixed reference mode needs to be exited or the fixed frequency function needs to be cancelled, any key or exit key is pressed, or the fixed frequency function is automatically exited after the fixed frequency function operates for a preset time period.
It should be noted that, for the sake of simplicity, the above method embodiments are all described as a series of action combinations, but those skilled in the art should understand that the present invention is not limited by the described action sequence, for example, step S103 and step S104 are not sequential in execution sequence; further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may be referred to as corresponding processes in the method embodiments, and will not be described herein again. The control method of the variable frequency air conditioner provided by the embodiment of the invention can achieve the same effect as the variable frequency air conditioner.
In the several embodiments provided in the present application, it should be understood that the disclosed control device may be implemented in other manners. For example, the above-described device (or system) embodiments are merely illustrative, and for example, the division of the units (or modules) is only one logical function division, and there may be other divisions when the actual implementation is performed, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units (or modules) described as separate parts may or may not be physically separate, for example, functional units in various embodiments of the present invention may be integrated in one physical unit, may be distributed in different physical units, or may be integrated in one physical unit by two or more units; it is also possible that one functional unit is implemented by two or more physical units in cooperation. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The integrated unit implemented in the form of a software functional unit may be stored in a computer readable storage medium. The software functional unit is stored in a storage medium and includes several instructions for causing a computer device to execute some steps of the methods according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. An inverter air conditioner comprising: the refrigerant loop is formed by the compressor, the outdoor heat exchanger, the throttling device and the indoor heat exchanger which are connected in sequence, and the outdoor fan and the indoor fan are connected in sequence; its characterized in that, inverter air conditioner still includes:
the control module is used for receiving a fixed parameter mode starting signal; and controlling the variable frequency air conditioner to operate according to the parameter setting mode starting signal, wherein the step of controlling the variable frequency air conditioner to operate according to the parameter setting mode comprises the following steps: controlling the compressor to operate at a fixed frequency, the indoor fan to operate at a first preset rotating speed, the outdoor fan to operate at a second preset rotating speed, and the throttling device to operate at a preset opening;
the absolute value of the difference between the refrigerating capacity or the heating capacity generated by the operation of the variable frequency air conditioner according to the fixed parameter mode and the rated refrigerating capacity or the rated heating capacity of the variable frequency air conditioner is smaller than or equal to a first threshold value.
2. The inverter air conditioner of claim 1, wherein the control module is configured to receive a signal indicating that a start key of a fixed-reference mode of the inverter air conditioner is triggered, and the signal indicating that the start key of the fixed-reference mode is triggered is used as the start signal of the fixed-reference mode.
3. The inverter air conditioner according to claim 1,
the control module is further configured to, when the inverter air conditioner operates in the parameter setting mode, control the inverter air conditioner to exit the parameter setting mode if a signal that any key of the inverter air conditioner or a parameter setting mode exit key of the inverter air conditioner is triggered is received.
4. The inverter air conditioner according to claim 1,
the control module is further configured to: and controlling the variable frequency air conditioner to exit the parameter setting mode under the condition that the running time length according to the parameter setting mode reaches a preset time length.
5. The inverter air conditioner according to any one of claims 1 to 4, wherein the control module comprises an indoor controller and an outdoor controller,
the indoor controller is used for receiving a parameter setting mode starting signal, controlling the indoor fan to operate at a first preset rotating speed according to the parameter setting mode starting signal, and sending an outdoor parameter setting mode starting instruction to the outdoor controller;
and the outdoor controller is used for controlling the compressor to operate at a fixed frequency, the outdoor fan to operate at a second preset rotating speed and the throttling device to operate at a preset opening degree according to the outdoor parameter-fixed mode starting signal.
6. A control method of a variable frequency air conditioner is characterized by comprising the following steps:
receiving a start signal of a fixed parameter mode;
controlling the variable frequency air conditioner to operate according to the parameter setting mode starting signal, wherein the step of controlling the variable frequency air conditioner to operate according to the parameter setting mode comprises the following steps: controlling a compressor of the variable frequency air conditioner to operate at a fixed frequency, an indoor fan to operate at a first preset rotating speed, an outdoor fan to operate at a second preset rotating speed and a throttling device to operate at a preset opening degree;
the absolute value of the difference between the refrigerating capacity or the heating capacity generated by the operation of the variable frequency air conditioner according to the fixed parameter mode and the rated refrigerating capacity or the rated heating capacity of the variable frequency air conditioner is smaller than or equal to a first threshold value.
7. The inverter air conditioner control method according to claim 6, further comprising:
and under the condition that the variable frequency air conditioner operates according to the fixed parameter mode, if a signal that any key of the variable frequency air conditioner or a fixed parameter mode exit key of the variable frequency air conditioner is triggered is received, controlling the variable frequency air conditioner to exit the fixed parameter mode.
8. The inverter air conditioner control method according to claim 6, further comprising:
and controlling the variable frequency air conditioner to exit the parameter setting mode under the condition that the running time length according to the parameter setting mode reaches a preset time length.
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| CN110454953B (en) * | 2019-08-05 | 2021-09-21 | 广东美的制冷设备有限公司 | Control method and device of air conditioner and air conditioner |
| CN114857741B (en) * | 2022-05-20 | 2024-05-28 | 江苏科技大学 | Air conditioning system with fault diagnosis and emergency starting functions and control method thereof |
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| JPH085171A (en) * | 1994-06-15 | 1996-01-12 | Yoriyuki Oguri | Operating method for cooler |
| CN201599899U (en) * | 2009-04-28 | 2010-10-06 | 欧威尔空调(中国)有限公司 | Refrigerant addition control system of air conditioner, |
| CN104990204A (en) * | 2015-06-04 | 2015-10-21 | 广东美的制冷设备有限公司 | Variable-frequency air conditioner and pressure detection method and device thereof |
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Address after: 528303 No. 8, Rong Gang Road, Ronggui street, Shunde District, Foshan, Guangdong. Applicant after: HISENSE HOME APPLIANCE GROUP Co.,Ltd. Applicant after: Hisense (Guangdong) Air Conditioning Co., Ltd. Address before: 528303 No. 8, Rong Gang Road, Ronggui street, Shunde District, Foshan, Guangdong. Applicant before: Hisense Kelon Electrical Holdings Co.,Ltd. Applicant before: Hisense (Guangdong) Air Conditioning Co., Ltd. |
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