CN114151922A - Control method, controller and air conditioning system - Google Patents
Control method, controller and air conditioning system Download PDFInfo
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- CN114151922A CN114151922A CN202111510325.0A CN202111510325A CN114151922A CN 114151922 A CN114151922 A CN 114151922A CN 202111510325 A CN202111510325 A CN 202111510325A CN 114151922 A CN114151922 A CN 114151922A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000003507 refrigerant Substances 0.000 claims abstract description 238
- 238000009423 ventilation Methods 0.000 claims description 16
- 238000004891 communication Methods 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 6
- 230000000007 visual effect Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 18
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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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
- F24F11/70—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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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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- 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)
- Fluid Mechanics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
In the technical scheme of the control method, the controller and the air conditioning system provided by the embodiment of the invention, the control method comprises the following steps: acquiring refrigerant information, wherein the refrigerant information comprises refrigerant concentration and/or refrigerant concentration increase rate; judging whether the refrigerant leaks or not at least according to the refrigerant information; under the condition of meeting the judgment condition, judging the leakage of the refrigerant; the judgment condition comprises that the refrigerant concentration is more than a preset concentration threshold value continuously for more than one time, and/or the refrigerant concentration increase rate is more than a preset rate threshold value. The method can judge whether the refrigerant leaks or not according to the concentration of the refrigerant and/or the increase rate of the concentration of the refrigerant, and has high reliability and safety.
Description
[ technical field ] A method for producing a semiconductor device
The invention relates to the technical field of air conditioners, in particular to a method, a controller and an air conditioning system related to refrigerant leakage.
[ background of the invention ]
In the conventional refrigerant detection method, parameters such as system pressure, coil temperature, air outlet temperature, environment temperature and the like during operation of the air conditioning system are collected, then the data of the collected parameters are compared with the data of the parameters tested in a laboratory during design of the air conditioning system, and if the data of the collected parameters deviate much from the data tested in the laboratory, the refrigerant of the air conditioning system leaks; otherwise, the air conditioning system is normal.
However, the reliability and safety of the conventional refrigerant detection method are low.
[ summary of the invention ]
In view of this, embodiments of the present invention provide a control method, a controller, and an air conditioning system, which can determine whether a refrigerant leaks by acquiring refrigerant information, and have higher reliability and higher safety.
In a first aspect, an embodiment of the present invention provides a control method, where the method includes the following steps:
acquiring refrigerant information, wherein the refrigerant information comprises refrigerant concentration and/or refrigerant concentration increase rate;
and judging whether the refrigerant leaks or not at least according to the refrigerant information, wherein the refrigerant leakage is judged under the condition that a judgment condition is met, and the judgment condition comprises that the refrigerant concentration is greater than a preset concentration threshold value for more than one time continuously and/or the refrigerant concentration increase rate is greater than a preset rate threshold value. The method can acquire the refrigerant information, and judge whether the refrigerant leaks or not according to the refrigerant concentration and/or the refrigerant concentration increase rate, so that the reliability and the safety can be improved.
In a second aspect, an embodiment of the present invention provides a controller, where the controller includes an obtaining module and a determining module:
the acquisition module is used for acquiring refrigerant information, wherein the refrigerant information comprises refrigerant concentration and/or refrigerant concentration increase rate;
the judgment module is used for judging whether the refrigerant leaks or not at least according to the refrigerant information, wherein the refrigerant leakage is judged under the condition that the judgment condition is met, the judgment condition comprises that the refrigerant concentration is greater than a preset concentration threshold value for more than one time continuously, and/or the refrigerant concentration increase rate is greater than a preset rate threshold value. The control system acquires the refrigerant information and judges the refrigerant leakage, and can improve the reliability and the safety.
In a third aspect, embodiments of the present invention provide an air conditioning system comprising a controller as claimed in any one of the preceding claims and at least one or more of a compressor, an indoor fan and a flow control valve, the controller being electrically connected to one or more of the compressor, the indoor fan and the flow control valve;
the controller is electrically connected with the compressor and is used for controlling the running frequency of the compressor; the controller is electrically connected with the indoor fan and is used for controlling the indoor fan to be started when a refrigerant leaks; and when the controller is electrically connected with the flow control valve and used for controlling the flow control valve to keep stopping when a refrigerant leaks. The air conditioning system comprises the controller and also has high reliability and safety.
[ description of the 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 embodiments 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 to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a flowchart of a control method of an air conditioner according to an embodiment of the present application;
fig. 2 is a flowchart of a control method after refrigerant leakage according to the present embodiment;
FIG. 3 is a block diagram of an air conditioning system according to the present application;
FIG. 4 is a block diagram of a controller according to the present application;
FIG. 5 is another block diagram of a controller according to the present application;
FIG. 6 is another block diagram of a controller according to the present application;
FIG. 7 is another block diagram of a controller according to the present application;
FIG. 8 is another block diagram of a controller according to the present application;
FIG. 9 is another block diagram of a controller according to the present application;
FIG. 10 is another block diagram of a controller according to the present application;
fig. 11 is another structural block diagram of an air conditioner according to the present application.
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all 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.
It should be understood that the term "and/or" as used herein is merely one type of associative relationship that describes an associated object, meaning that three types of 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.
Fig. 1 is a flowchart of a control method of an air conditioner according to an embodiment of the present application, as shown in fig. 1, the flowchart including the steps of:
101: acquiring refrigerant information, wherein the refrigerant information comprises refrigerant concentration and/or refrigerant concentration increase rate;
in one embodiment, the refrigerant information in the air may be detected by a refrigerant sensor, such as a MEMS sensor.
The refrigerant information can be represented by a refrigerant concentration value and/or a refrigerant concentration increase rate value, and the refrigerant information can also be represented by a voltage signal, a current signal, a switch signal or a 485 communication signal.
Judging whether the refrigerant leaks or not according to the voltage signal under the condition that the refrigerant information is represented by the voltage signal;
judging whether the refrigerant leaks or not according to the current signal under the condition that the current signal represents the refrigerant information;
judging whether the refrigerant leaks or not according to the high-low level signals under the condition that the refrigerant information is represented by using the switching signals;
and under the condition that the RS485 communication signal is used for representing the refrigerant information, whether the refrigerant leaks or not is judged according to the digital signal for representing whether the refrigerant leaks or not.
It should be noted that only the refrigerant concentration directly detected by the refrigerant sensor obtains the refrigerant concentration increase rate according to the refrigerant concentration.
102: and judging whether the refrigerant leaks or not at least according to the refrigerant information, wherein the refrigerant leakage is judged under the condition that the judgment condition is met, and the judgment condition comprises that the refrigerant concentration is greater than a preset concentration threshold value for more than one time continuously and/or the refrigerant concentration increase rate is greater than a preset rate threshold value.
In one embodiment, the refrigerant information is acquired at regular intervals, and the refrigerant leakage is determined only when the refrigerant concentration is greater than the preset concentration threshold value more than once continuously, that is, at least twice more than the preset concentration threshold value continuously, for example, the refrigerant concentration acquired at 5s is greater than the preset concentration threshold value, and the refrigerant concentration acquired at 10s is also greater than the preset concentration threshold value.
But when the refrigerant concentration increase rate is once greater than a preset rate threshold value, the refrigerant leakage is directly judged, wherein the refrigerant concentration increase rate refers to the increased refrigerant concentration in unit time.
On the contrary, under the condition that the refrigerant is unstable, the frequency of acquiring the refrigerant information can be improved, so that the safety and the reliability are enhanced.
It should be noted that, if only one of the two determination conditions is satisfied, the refrigerant leakage is determined.
Through the steps 101 to 102, the present embodiment determines whether the refrigerant leaks according to the refrigerant concentration and/or the refrigerant concentration increase rate, and the safety and reliability are high.
In an embodiment, fig. 2 is a flowchart of a control method after refrigerant leakage according to the present embodiment, and as shown in fig. 2, the flowchart includes the following steps:
201: when the refrigerant leakage is judged, the air conditioner is controlled to be in a refrigeration mode, the flow control valve is controlled to be kept cut off, and the compressor is controlled to run at a first frequency.
In a refrigeration state, the compressor operates to pump the refrigerant in the indoor heat exchanger or the indoor refrigerant pipe to the compressor, and after the compressor operates for a period of time, the refrigerant in the indoor heat exchanger or the indoor refrigerant pipe is pumped to the compressor, so that the indoor heat exchanger is in a quasi-vacuum state, wherein the quasi-vacuum state can be a state that the indoor heat exchanger does not contain the refrigerant but possibly has air; since it is difficult to achieve complete vacuum in engineering, the quasi-vacuum state may be a state in which the indoor heat exchanger contains a small amount of refrigerant, and the small amount of refrigerant does not cause a potential safety hazard.
In order to prevent the refrigerant from diffusing back to the indoor heat exchanger from the refrigerant pipe in the loop at the other side, the flow control valve is closed, so that the refrigerant cannot flow back to the indoor heat exchanger, and can only flow to the compressor from the indoor heat exchanger or the indoor refrigerant pipe in a one-way mode, the content of the indoor refrigerant is reduced, and potential safety hazards are prevented, wherein the flow control valve can be an electronic expansion valve or an electromagnetic stop valve.
It should be noted that the higher the frequency of the compressor is, the higher the efficiency of extracting the refrigerant is, and in order to improve the control efficiency after the refrigerant leakage, the first frequency may be the maximum frequency in the full-load state of the compressor, and may be other frequencies.
Through the step 201, the air conditioner is controlled to be in the refrigeration mode, the compressor continuously pumps out the refrigerant from the indoor heat exchanger or the indoor refrigerant pipe, at the moment, the indoor refrigerant is not supplemented due to the fact that the flow control valve is closed, the indoor refrigerant is recycled to the outside, the total amount of the refrigerant released to the indoor space is reduced, the refrigerant leakage rate is reduced, and safety is enhanced.
In one embodiment, when the air conditioner is in the heating mode, the method for controlling after refrigerant leakage further comprises the following steps:
s202: and switching the state of the reversing valve to adjust the air conditioner from a heating mode to a cooling mode.
In the heating mode, the flow direction of the high-temperature and high-pressure gaseous refrigerant is from the compressor to the indoor heat exchanger, and the low-temperature and low-pressure gaseous refrigerant is sucked back to the compressor from the outdoor heat exchanger by the compressor, so that the gaseous refrigerant is not blocked from flowing into the indoor heat exchanger or absorbing the refrigerant of the outdoor heat exchanger. Therefore, when the refrigerant is recovered, the state of the reversing valve can be switched, and the heating mode is adjusted to the cooling mode, wherein the reversing valve can be a four-way valve.
Through the step 202, the state of the reversing valve is switched to adjust the air conditioner to the refrigeration mode, the compressor is controlled to operate, the flow control valve is controlled to be stopped, so that the refrigerant in the indoor heat exchanger or the indoor refrigerant pipe is pumped to the compressor, the total amount of the refrigerant released into the room is reduced, the leakage rate of the refrigerant is reduced, and the safety is enhanced.
Considering that after the air conditioner is controlled to operate at the first frequency for a period of time, most of the refrigerant in the indoor heat exchanger or the indoor refrigerant pipe is pumped to the compressor, and the continuous control of the compressor to operate at the first frequency causes a large amount of unnecessary energy loss, in one embodiment, the method for controlling the air conditioner to operate at the first frequency for a period of time after the refrigerant leaks further comprises the following steps:
203: the compressor is controlled to operate at a second frequency, wherein the second frequency is less than the first frequency.
The compressor may draw the refrigerant from the indoor heat exchanger or the indoor refrigerant pipe by controlling the compressor to operate at a second frequency, which may be a minimum frequency at which the compressor operates.
In one embodiment, after controlling the air conditioner to operate at the first frequency for a period of time, the control method further includes the steps of:
204: controlling the compressor to periodically perform the following steps: and after the compressor is controlled to be closed for the first time period, the compressor is controlled to operate at a third frequency for a second time period, wherein the third frequency is greater than or equal to the second frequency, and the third frequency is less than or equal to the first frequency.
When the compressor is controlled to operate at the third frequency, the compressor can draw out the refrigerant from the indoor heat exchanger or the indoor refrigerant pipe.
The first duration and the second duration may be adjusted according to the refrigerant concentration, for example, the first duration may be extended and the second duration may be shortened when the refrigerant concentration is higher than a preset safe refrigerant concentration threshold.
Through the step 203 and/or the step 204, a small amount of refrigerant contained in the room is extracted, so that the total amount of the refrigerant released to the indoor space is reduced, the leakage rate of the refrigerant is reduced, the safety is enhanced, and the energy saving performance is also met.
In one example, the method for controlling the leaked refrigerant further includes the following steps:
205: controlling an indoor fan to be started;
the indoor fan is controlled to be started, so that the refrigerant can be prevented from being leaked and then gathered, the leaked refrigerant can be diffused quickly, the concentration of the refrigerant is reduced, and potential safety hazards are prevented; in order to improve the efficiency of diffusing leakage refrigerants, the indoor fan can be controlled to operate at the maximum rotating speed.
206: and controlling the ventilation motor to be started and sending out warning information.
The ventilation motor is controlled to be started, leaked refrigerants can be rapidly diffused outdoors, the concentration of the refrigerants is rapidly reduced, and potential safety hazards are prevented.
Send warning information, can all be in the scintillation state through opening pilot lamp, buzzer warning, audible alarm, or the pilot lamp on the control display panel for after indoor personnel received warning information, stop using electronic equipment, open door and window and ventilate, keep away from the danger area and report to the police, professional closes all flow control valves, compressor and power after confirming to eliminate the potential safety hazard simultaneously.
It is supplementary to need, in an embodiment, air conditioning system still includes and trades new trend device, and this embodiment can control and trade new trend wind motor and open, and wherein, trades new trend wind motor and can be fast to outdoor diffusion leaked refrigerant, and outdoor air that purifies also fast indoor diffusion simultaneously reduces the concentration of refrigerant rapidly, and the security is higher.
Through the steps 205 to 206, the concentration of the refrigerant can be rapidly reduced, and the potential safety hazard can be prevented.
An air conditioning system is also provided in the present embodiment, and fig. 3 is a block diagram of an air conditioning system according to the present application, the air conditioning system including the controller 40 according to any one of the above embodiments and at least one or more of the compressor 322, the indoor fan 312, and the flow control valve 323, the controller 40 being electrically connected to one or more of the compressor 322, the indoor fan 312, and the flow control valve 323;
the controller 40, when electrically connected to the compressor 322, is configured to control the operating frequency of the compressor 322; when the controller 40 is electrically connected to the indoor fan 312, the controller is configured to control the indoor fan 312 to be turned on when a refrigerant leaks; the controller 40 is electrically connected to the flow control valve 323, and controls the flow control valve 323 to be kept off when the refrigerant leaks.
The present embodiment further provides a controller, which is suitable for the air conditioning system 30, and the controller is used to implement the foregoing embodiments and preferred embodiments, and the description of the controller is omitted.
Fig. 4 is a block diagram of a controller according to the present application, and as shown in fig. 4, the controller 40 includes an obtaining module 401 and a determining module 402:
an obtaining module 401, configured to obtain refrigerant information, where the refrigerant information includes a refrigerant concentration and/or a refrigerant concentration increase rate;
the judging module 402 is configured to judge whether the refrigerant is leaked according to at least the refrigerant information, where the judging condition includes that the refrigerant concentration is greater than a preset concentration threshold continuously more than once and/or that the refrigerant concentration increase rate is greater than a preset rate threshold, and judges whether the refrigerant is leaked according to the judging condition.
In one embodiment, the obtaining module 401 may obtain a refrigerant concentration and send the refrigerant concentration to the determining module 402; the judging module 402 judges whether the refrigerant concentration is greater than a preset concentration threshold value more than once continuously; and under the condition that the concentration of the refrigerant is greater than the preset concentration threshold value for more than one time continuously, judging that the refrigerant leaks.
In another embodiment, the obtaining module 401 may obtain the refrigerant concentration, and send the refrigerant concentration to the determining module 402; the determining module 402 may calculate a refrigerant concentration increase rate according to the refrigerant concentration; the judging module 402 judges whether the refrigerant concentration increase rate is greater than a preset rate threshold; and under the condition that the refrigerant concentration increase rate is greater than a preset rate threshold value, judging that the refrigerant leaks.
In another embodiment, the obtaining module 401 may obtain the refrigerant concentration, and may calculate the refrigerant concentration increase rate according to the refrigerant concentration; the acquisition module 401 sends the calculated refrigerant concentration increase rate to the judgment module 402; the determining module 402 determines whether the refrigerant concentration increase rate is greater than a preset rate threshold; and under the condition that the refrigerant concentration increase rate is greater than a preset rate threshold value, judging that the refrigerant leaks.
In another embodiment, the obtaining module 401 may obtain a refrigerant concentration increase rate, and send the refrigerant concentration increase rate to the determining module 402; the judging module 402 judges whether the refrigerant concentration increase rate is greater than a preset rate threshold; and under the condition that the refrigerant concentration increase rate is greater than a preset rate threshold value, judging that the refrigerant leaks.
In one embodiment, the controller 40 includes a memory 403 and a processor 404, as shown in fig. 5, fig. 5 is a block diagram of a controller according to the present application, the memory 403 is used for storing programs, and the processing unit 404 calls the programs and is used for implementing the functions of the obtaining module 401 and the judging module 402.
In one embodiment, fig. 6 is another block diagram of a controller according to the present application, and as shown in fig. 6, the controller 40 further includes a control module 405:
and the control module 405 is configured to control the air conditioning system 30 to be in the cooling mode, control the flow control valve 323 to be kept off, and control the compressor 322 to operate at the first frequency when the refrigerant leakage is determined.
In one embodiment, the control module 405 of the controller 40 is further configured to switch the reversing valve 324 to change the air conditioning system 30 from the heating mode to the cooling mode when the air conditioning system 30 is in the heating mode, and/or to control the compressor 322 to operate at a second frequency, wherein the second frequency is less than the first frequency, and/or to control the compressor 322 to periodically perform the following steps: after the compressor 322 is controlled to be turned off for the first time period, the compressor 322 is controlled to operate at a third frequency for a second time period, wherein the third frequency is greater than or equal to the second frequency, and the third frequency is less than or equal to the first frequency.
In the embodiment of the present invention, when the control module 405 of the controller 40 controls the air conditioning system 30 to be in the cooling mode, the control module controls the operation of the compressor 322 and the flow control valve 323 to stop, so as to pump the refrigerant in the indoor heat exchanger 311 or the indoor refrigerant pipe to the compressor 322, reduce the concentration of the indoor refrigerant, and control the leakage of the refrigerant.
In one embodiment, the controller 40 further includes a refrigerant detection circuit 406, wherein the controller 40 is powered by a power source 407, so that the controller can obtain refrigerant information through the refrigerant detection circuit and determine whether the refrigerant leaks.
In another embodiment, as shown in fig. 7, fig. 7 is another structural block diagram of the controller according to the present application, the controller 40 further includes two refrigerant detection circuits 406, and the refrigerant detection circuits 406 are used for detecting the concentration of the refrigerant in the air, wherein the controller 40 is powered by two power sources 407 simultaneously. By arranging the two refrigerant detection circuits 406 and the two power supplies 407, the controller 40 can still normally operate under the support of the other refrigerant detection circuit 406 and the power supply 407 when one refrigerant detection circuit 406 fails or one power supply 407 stops supplying power, so that the safety and reliability of the controller 40 are high.
In an embodiment, fig. 8 is another structural block diagram of the controller according to the present application, and as shown in fig. 8, the controller 40 includes a refrigerant sensor 408, and the refrigerant sensor 408 is disposed within 20cm of a vicinity of an indoor heat exchanger or an indoor refrigerant pipe, so that the refrigerant sensor 408 can detect refrigerant information more accurately, and the safety is high.
In one embodiment, the controller 40 further includes an audible and visual alarm circuit 409 and a communication circuit 410, so that the controller 40 can send out an alarm message when the refrigerant leaks, and the indoor unit 31 and the outdoor unit 32 can communicate with each other.
In another embodiment, as shown in fig. 9, fig. 9 is another structural block diagram of the controller according to the present application, and the controller 40 further includes two audible and visual alarm circuits 409 and two communication circuits 410.
And the sound-light alarm circuit 409 is used for sending out alarm information, wherein the alarm information can be sent out by turning on an indicator lamp, a buzzer and a voice alarm, or the indicator lamp on the control display panel is in a flashing state, so that after indoor personnel receive the alarm information, the electronic equipment is stopped to use, doors and windows are opened to ventilate, the dangerous area is kept away from for alarm, and meanwhile, all the flow control valves 323, the compressor 322 and the power supply 407 are closed by professional personnel after the potential safety hazard is confirmed to be eliminated.
And a communication loop 410 for communication between the indoor unit 31 and the outdoor unit 32.
By arranging the two sound-light alarm loops 409 and the two communication loops 410, when one sound-light alarm loop 409 fails or one communication loop 410 fails, the other sound-light alarm loop 409 can still send out warning information, the other communication loop 410 can still be used for communication between the indoor unit 31 and the outdoor unit 32, and the controller 40 is high in safety. In one embodiment, the controller 40 further includes an indoor fan circuit 411 and a ventilation motor circuit 412, so that the controller 40 can control the indoor fan 312 and the ventilation motor 33 to be turned on when the refrigerant leaks.
In one embodiment, fig. 10 is another block diagram of a controller according to the present application, and as shown in fig. 10, the control system 40 further includes two indoor fan circuits 411 and two ventilation motor circuits 412:
an indoor fan circuit 411, configured to control the indoor fan 312 to be turned on when the refrigerant leaks;
and a ventilation motor circuit 412 for controlling the ventilation motor 33 to be turned on when the refrigerant leaks.
The indoor fan is controlled to be started, so that the refrigerant can be prevented from being leaked and then gathered, the leaked refrigerant can be diffused quickly, the concentration of the refrigerant is reduced, and potential safety hazards are prevented; in order to improve the efficiency of diffusing leakage refrigerants, the indoor fan can be controlled to operate at the maximum rotating speed.
The control ventilation motor is opened and the refrigerant that can leak to outdoor diffusion fast reduces the concentration of refrigerant rapidly, prevents the emergence of potential safety hazard.
By arranging two indoor fan circuits 411 and two ventilation motor circuits 412, in the event that one indoor fan circuit 411 or one ventilation motor circuit 412 fails, the other indoor fan circuit 411 or the other ventilation motor circuit 412 can still be used for controlling the indoor fan 312 and the ventilation motor 33 to operate or shut down, and the controller 40 has high safety. An air conditioning system is also provided in the present embodiment, and fig. 11 is a block diagram illustrating the structure of an air conditioner according to the present application, which includes an indoor heat exchanger 311, an outdoor heat exchanger 321, a compressor 322, an indoor fan 312, a flow control valve 323, and the controller 40 described above.
In the several embodiments provided in this specification, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, 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.
In addition, functional units in the embodiments of the present description may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, or in a form of hardware plus a software functional unit.
The above description is only a preferred embodiment of the present disclosure, and should not be taken as limiting the present disclosure, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.
Claims (13)
1. A control method of an air conditioner, characterized by comprising the steps of:
acquiring refrigerant information, wherein the refrigerant information comprises refrigerant concentration and/or refrigerant concentration increase rate;
judging whether the refrigerant leaks or not at least according to the refrigerant information, wherein the refrigerant leakage is judged under the condition that the judgment condition is met; the judgment condition comprises that the refrigerant concentration is greater than a preset concentration threshold value for more than one time continuously, and/or the refrigerant concentration increase rate is greater than a preset rate threshold value.
2. The method according to claim 1, characterized in that the method further comprises the steps of: and when the refrigerant leakage is judged, controlling the air conditioner to be in a refrigeration mode, controlling the flow control valve to keep cut off, and controlling the compressor to run at a first frequency.
3. The method of claim 2, further comprising the steps of, while the air conditioner is in a heating mode: and switching the state of a reversing valve to adjust the air conditioner from a heating mode to a cooling mode.
4. The method as claimed in claim 2 or 3, wherein after controlling the air conditioner to operate at the first frequency for a period of time, the method further comprises the steps of: controlling the compressor to operate at a second frequency, wherein the second frequency is less than the first frequency.
5. The method as claimed in claim 2 or 3, wherein after controlling the air conditioner to operate at the first frequency for a period of time, the method further comprises the steps of: controlling the compressor to periodically perform the following steps: and after the compressor is controlled to be closed for the first time period, the compressor is controlled to operate for a second time period at a third frequency, wherein the third frequency is greater than or equal to the second frequency, and the third frequency is less than or equal to the first frequency.
6. The controller is used for controlling an air conditioning system and is characterized by comprising an acquisition module and a judgment module:
the acquisition module is used for acquiring refrigerant information, wherein the refrigerant information comprises refrigerant concentration and/or refrigerant concentration increase rate;
the judgment module is used for judging whether the refrigerant leaks or not at least according to the refrigerant information, wherein the refrigerant leakage is judged under the condition that the judgment condition is met; the judgment condition comprises that the refrigerant concentration is greater than a preset concentration threshold value for more than one time continuously, and/or the refrigerant concentration increase rate is greater than a preset rate threshold value.
7. The controller of claim 7, wherein the air conditioning system comprises a flow control valve, the controller further comprising a control module: and the control module is used for controlling the air conditioning system to be in a refrigeration mode, controlling the flow control valve to keep stopping and controlling the compressor to run at a first frequency under the condition of judging the refrigerant leakage.
8. The controller of claim 8, wherein the air conditioning system comprises a reversing valve, and the control module of the controller is further configured to switch the state of the reversing valve when the air conditioning system is in a heating mode, to change the air conditioning system from the heating mode to the cooling mode, and/or to control the compressor to operate at a second frequency, wherein the second frequency is less than the first frequency, and/or to control the compressor to periodically perform the following steps: and after the compressor is controlled to be closed for the first time period, the compressor is controlled to operate for a second time period at a third frequency, wherein the third frequency is greater than or equal to the second frequency, and the third frequency is less than or equal to the first frequency.
9. The controller of claim 7, further comprising two refrigerant detection circuits for detecting a refrigerant concentration in air, wherein the controller is powered by two power sources simultaneously.
10. The controller of claim 7, further comprising a refrigerant sensor for detecting a refrigerant concentration in the air, wherein the sensor is disposed within 20cm of the indoor heat exchanger or the indoor refrigerant pipe.
11. The controller of claim 7, wherein the air conditioning system comprises an indoor unit and an outdoor unit, and the controller further comprises two audible and visual alarm loops and two communication loops:
the sound and light alarm loop is used for sending out warning information when the refrigerant leakage is judged;
and the communication loop is used for communication between the indoor unit and the outdoor unit.
12. The controller of claim 7, wherein the air conditioning system includes an indoor fan and a ventilation device, the controller further comprising two indoor fan circuits and two ventilation motor circuits:
the indoor fan loop is used for controlling the indoor fan to be started when the refrigerant leaks;
and the ventilation motor loop is used for controlling the ventilation motor to operate when the refrigerant leaks.
13. An air conditioning system comprising a controller according to any one of claims 6 to 12 and one or more of at least a compressor, an indoor fan and a flow control valve, the controller being electrically connected to one or more of the compressor, the indoor fan and the flow control valve;
the controller is electrically connected with the compressor and is used for controlling the running frequency of the compressor; the controller is electrically connected with the indoor fan and is used for controlling the indoor fan to be started when the refrigerant leaks; and when the controller is electrically connected with the flow control valve and used for controlling the flow control valve to keep stopping when the refrigerant leaks.
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| CN2021111641413 | 2021-09-30 | ||
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