CN105241016A - Indoor draught fan control device and method for multi-connected air conditioner - Google Patents
Indoor draught fan control device and method for multi-connected air conditioner Download PDFInfo
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- CN105241016A CN105241016A CN201510706587.2A CN201510706587A CN105241016A CN 105241016 A CN105241016 A CN 105241016A CN 201510706587 A CN201510706587 A CN 201510706587A CN 105241016 A CN105241016 A CN 105241016A
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- temperature
- indoor fan
- indoor
- electric capacity
- resistance
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Classifications
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
Abstract
The invention discloses an indoor draught fan control device for a multi-connected air conditioner. The indoor draught fan control device comprises a control processor MCU, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, an indoor temperature sensor RT1 and an inner disc temperature sensor RT2. One end of the resistor R1 is connected with a first simulation signal input pin of the control processor MCU. The other end of the resistor R1 is connected with one end of the capacitor C1, the negative pole of the capacitor C2, one end of the resistor R2 and one end of the indoor temperature sensor RT1. The positive pole of the capacitor C2 is connected with a positive power source. The other end of the indoor temperature sensor RT1 is connected with the positive power source. The other end of the capacitor C1 and the other end of the resistor R2 are grounded. By means of the indoor draught fan control device and method, it can be effectively avoided that the temperature of air return openings of indoor draught fans of the air conditioner is too high, and part of the indoor draught fans cannot be started, or the whole air conditioner system cannot be started, and thus normal operation of the air conditioner is guaranteed.
Description
Technical field
The present invention relates to air conditioner controlling technology field, be specifically related to a kind of multi-connected air conditioner indoor fan control method and device.
Background technology
Return air temperature (T return air): refer to the indoor temperature detected being placed in indoor apparatus of air conditioner return air inlet temperature sensor.
Inner disc temperature (T inner disc): refer to air conditioner indoor unit evaporator coil temperature.
Design temperature (T setting): refer to that user wants air-conditioning to regulate room air to arrive assigned temperature and the temperature value that arranges.
Indoor fan traditional control method: when heating, when return air temperature (T return air) < design temperature (T setting), then indoor fan runs; When return air temperature (T return air) >=design temperature (T setting), then indoor fan stops.During refrigeration, return air temperature (T return air) > design temperature (T setting), then indoor fan runs; When return air temperature (T return air) <=design temperature (T setting), then indoor fan stops.
Adopt traditional control method, there is following impact.In multi-connected air conditioner heating process, after compressor start, indoor machine evaporation coil temperature can be elevated to rapidly more than 50 DEG C, due to the diffusivity of temperature, the temperature of the indoor set return air inlet air closed on can be made to raise.The indoor set of having started shooting, because indoor fan is in operation, thus the air of return air inlet is exchanged with the air in other place indoor, thus reduce indoor return air mouth temperature, the temperature in return air inlet temperature and other place indoor is consistent, and air-conditioning can normally run.The indoor set of not starting shooting, due to indoor fan off-duty, return air inlet temperature, by the temperature higher than other place indoor, when return air inlet air themperature continues to raise, causes return air inlet temperature higher than user's design temperature; When this indoor set becomes start from shutdown, because return air inlet temperature is higher than user's design temperature, indoor fan can not start, thus can not raise indoor temperature, affect the normal operation of air-conditioning.If whole air-conditioning system is because indoor temperature reaches design temperature after shutting down, after indoor temperature declines, but do not run due to indoor fan, when indoor return air mouth temperature is kept above user's design temperature, whole air-conditioning system cannot start again.
Summary of the invention
Instant invention overcomes the deficiencies in the prior art, a kind of multi-connected air conditioner indoor fan control device and method are provided, for overcoming multi-connected air conditioner indoor set when not starting shooting, due to the technical problem that return air inlet temperature virtual height causes indoor fan normally not start.
Consider the problems referred to above of prior art, according to an aspect disclosed by the invention, the present invention by the following technical solutions:
A kind of multi-connected air conditioner indoor fan control device, it comprise control processor MCU, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, indoor temperature transmitter RT1 and inner disc temperature sensor RT2, described resistance R1 one end is connected with the analog signal input pin one of control processor MCU, and the described resistance R1 other end is connected with described electric capacity C1 one end, electric capacity C2 negative pole, resistance R2 one end and indoor temperature transmitter RT1 one end respectively; The positive pole of described electric capacity C2 is connected with a positive supply, and the other end of described indoor temperature transmitter RT1 is also connected with described positive supply; The other end of described electric capacity C1 and resistance R2 other end ground connection; Described resistance R3 one end is connected with the analog signal input pin two of described control processor MCU, and the described resistance R3 other end is connected with electric capacity C3 one end, electric capacity C4 negative pole, resistance R4 one end and inner disc temperature sensor RT2 one end respectively; The positive pole of described electric capacity C4 is connected with a positive supply, and the other end of described inner disc temperature sensor RT2 is also connected with described positive supply; The other end of described electric capacity C3 and resistance R4 other end ground connection.
In order to realize the present invention better, further technical scheme is:
According to one embodiment of the invention, described positive supply is power supply+5V.
The present invention can also be:
A kind of multi-connected air conditioner indoor fan control method, under air-conditioning heating pattern, when indoor set is in off-mode, indoor fan does not start; When after indoor set start, perform following operation:
(1), when inner disc temperature is less than A DEG C, indoor fan does not start;
(2) inner disc temperature is more than or equal to A DEG C, and when return air temperature is less than design temperature, indoor fan startup optimization;
(3) inner disc temperature is more than or equal to A DEG C, and when return air temperature is more than or equal to design temperature, if indoor fan after powering off-duty to cross or indoor fan ran and normally out of service more than X minute, then indoor fan forced service Y minute; Otherwise indoor fan stops; Indoor fan forced service is after Y minute: if return air temperature is less than design temperature, then indoor fan continues to run; If return air temperature is still more than or equal to design temperature, then indoor fan stops, until return air temperature is less than design temperature or indoor fan is out of service more than X minute, indoor fan restarts operation; If return air temperature remains be more than or equal to design temperature, then indoor fan is according to stopping X minute, the operation actuation cycle start and stop of Y minute.
Compared with prior art, one of beneficial effect of the present invention is:
A kind of multi-connected air conditioner indoor fan control device of the present invention and method, by to return air temperature, the detection of inner disc temperature and the control of indoor fan, can effectively avoid due to indoor apparatus of air conditioner return air inlet temperature too high (virtual height), cause the serious problems that part indoor fan cannot start or whole air-conditioning system cannot start, thus ensure that the normal operation of air-conditioning.
Accompanying drawing explanation
In order to clearer explanation present specification embodiment or technical scheme of the prior art, below the accompanying drawing used required in the description to embodiment or prior art is briefly described, apparently, the accompanying drawing that the following describes is only the reference to some embodiments in present specification, for those skilled in the art, when not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 shows the conspectus of multi-connected air conditioner indoor fan control device according to an embodiment of the invention.
Fig. 2 shows multi-connected air conditioner indoor fan control method schematic flow sheet according to an embodiment of the invention.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, a kind of multi-connected air conditioner indoor fan control device, it comprise control processor MCU, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, indoor temperature transmitter RT1 and inner disc temperature sensor RT2, described resistance R1 one end is connected with the analog signal input pin one of control processor MCU, and the described resistance R1 other end is connected with described electric capacity C1 one end, electric capacity C2 negative pole, resistance R2 one end and indoor temperature transmitter RT1 one end respectively; The positive pole of described electric capacity C2 is connected with a positive supply, and the other end of described indoor temperature transmitter RT1 is also connected with described positive supply; The other end of described electric capacity C1 and resistance R2 other end ground connection; Described resistance R3 one end is connected with the analog signal input pin two of described control processor MCU, and the described resistance R3 other end is connected with electric capacity C3 one end, electric capacity C4 negative pole, resistance R4 one end and inner disc temperature sensor RT2 one end respectively; The positive pole of described electric capacity C4 is connected with a positive supply, and the other end of described inner disc temperature sensor RT2 is also connected with described positive supply; The other end of described electric capacity C3 and resistance R4 other end ground connection.
Can adopt power supply+5V for above positive supply, also can be other voltage number of this area.
According to the indoor apparatus of air conditioner return air temperature detected, inner disc temperature, and the temperature of user's setting, realize the control to air conditioning chamber's inner blower by a kind of effective control algolithm.Particularly, under air-conditioning heating pattern, when indoor set is in off-mode, indoor fan does not start; When after indoor set start, perform following operation:
(1), when inner disc temperature is less than A DEG C, indoor fan does not start.
(2) inner disc temperature is more than or equal to A DEG C, and when return air temperature is less than design temperature, indoor fan startup optimization.
(3) inner disc temperature is more than or equal to A DEG C, and when return air temperature is more than or equal to design temperature, if indoor fan after powering off-duty to cross or indoor fan ran and normally out of service more than X minute, then indoor fan forced service Y minute; Otherwise indoor fan stops.Indoor fan forced service is after Y minute: if return air temperature is less than design temperature, then indoor fan continues to run; If return air temperature is still more than or equal to design temperature, then indoor fan stops, until return air temperature is less than design temperature or indoor fan is out of service more than X minute, indoor fan restarts operation; If return air temperature remains be more than or equal to design temperature, then indoor fan is according to stopping X minute, the operation actuation cycle start and stop of Y minute.Whole indoor fan control logic processing procedure.
For parameters such as above A, X, Y, do not limit occurrence, those skilled in the art can be preferred as the case may be.
Be described below by selecting occurrence:
Air-conditioning will be introduced under heating mode runs, the control method of indoor fan.Suppose that design temperature T sets=24 DEG C, people present position temperature is 15 DEG C (room temperatures), A DEG C=25 DEG C, X=10, Y=2.As shown in Figure 2:
The first step, initializes.Indoor fan running status is set to stopped status, i.e. sta_fan=0.State of whether being run by indoor fan is set to off-duty and crosses state, i.e. g_Flag.fan_run_fst=0.
Second step, by line control machine, remote controller or switching on and shutting down button, obtains switching on and shutting down signal.By return air temperature shown in Fig. 1, inner disc temperature sensing circuit, obtain return air temperature value T return air and inner disc temperature value T inner disc.
3rd step, if indoor set is not started shooting, then indoor fan stops, and then gets back to second step.If indoor set is started shooting, then enter the 4th step.
4th step, if inner disc temperature T inner disc <25 DEG C, then indoor fan stops, and then gets back to second step.If inner disc temperature T inner disc >=25 DEG C, then enter the 5th step.
5th step, if return air temperature T return air < design temperature T sets (24 DEG C), then indoor fan runs, and then gets back to second step.If return air temperature T return air >=design temperature T sets (24 DEG C), then enter the 6th step.
6th step, judges whether indoor fan runs.If sta_fan=1, illustrate that indoor fan runs, if indoor fan is more than 2 minutes running time, then indoor fan stops, and then gets back to second step; Otherwise indoor fan runs, and then gets back to second step.If sta_fan=0, illustrate that indoor fan is in halted state, then enter the 7th step.
7th step, judges whether indoor set start rear fan ran.If fruit g_Flag.fan_run_fst=1, illustrate that this indoor set start rear fan ran, if the indoor fan time out of service was more than 10 minutes, then indoor fan runs, and then gets back to second step; Otherwise indoor fan stops, then get back to second step.If g_Flag.fan_run_fst=0, this indoor set start rear fan off-duty mistake is described, then indoor fan runs, and then gets back to second step.
In sum, after using indoor fan control method of the present invention, as long as under open state and inner disc temperature T inner disc >25 DEG C, even if when return air temperature T return air >=design temperature T sets (24 DEG C), indoor fan also can forced service 2 minutes, stop the do action of 10 minutes.Therefore, very important person present position temperature (room temperature) is less than user's design temperature, by indoor fan forced service 2 minutes, just the air in the air of return air inlet and other place, room can be exchanged, thus make return air temperature drop to below user's design temperature, ensure the normal operation of air-conditioning.
In this description, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, identical similar portion cross-reference between each embodiment.
Spoken of in this manual " embodiment ", " another embodiment ", " embodiment ", etc., refer to the specific features, structure or the feature that describe in conjunction with this embodiment and be included at least one embodiment of the application's generality description.Multiple place occurs that statement of the same race is not necessarily refer to same embodiment in the description.Furthermore, when describing specific features, structure or a feature in conjunction with any embodiment, what advocate is also fall within the scope of the invention to realize this feature, structure or feature in conjunction with other embodiments.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of and claim open in the application, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the modification of carrying out building block and/or layout is with except improvement, to those skilled in the art, other purposes also will be obvious.
Claims (3)
1. a multi-connected air conditioner indoor fan control device, it is characterized in that it comprises control processor MCU, resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, indoor temperature transmitter RT1 and inner disc temperature sensor RT2, described resistance R1 one end is connected with the analog signal input pin one of control processor MCU, and the described resistance R1 other end is connected with described electric capacity C1 one end, electric capacity C2 negative pole, resistance R2 one end and indoor temperature transmitter RT1 one end respectively; The positive pole of described electric capacity C2 is connected with a positive supply, and the other end of described indoor temperature transmitter RT1 is also connected with described positive supply; The other end of described electric capacity C1 and resistance R2 other end ground connection; Described resistance R3 one end is connected with the analog signal input pin two of described control processor MCU, and the described resistance R3 other end is connected with electric capacity C3 one end, electric capacity C4 negative pole, resistance R4 one end and inner disc temperature sensor RT2 one end respectively; The positive pole of described electric capacity C4 is connected with a positive supply, and the other end of described inner disc temperature sensor RT2 is also connected with described positive supply; The other end of described electric capacity C3 and resistance R4 other end ground connection.
2. multi-connected air conditioner indoor fan control device according to claim 1, is characterized in that described positive supply is power supply+5V.
3. a multi-connected air conditioner indoor fan control method, is characterized in that, under air-conditioning heating pattern, when indoor set is in off-mode, indoor fan does not start; When after indoor set start, perform following operation:
(1), when inner disc temperature is less than A DEG C, indoor fan does not start;
(2) inner disc temperature is more than or equal to A DEG C, and when return air temperature is less than design temperature, indoor fan startup optimization;
(3) inner disc temperature is more than or equal to A DEG C, and when return air temperature is more than or equal to design temperature, if indoor fan after powering off-duty to cross or indoor fan ran and normally out of service more than X minute, then indoor fan forced service Y minute; Otherwise indoor fan stops; Indoor fan forced service is after Y minute: if return air temperature is less than design temperature, then indoor fan continues to run; If return air temperature is still more than or equal to design temperature, then indoor fan stops, until return air temperature is less than design temperature or indoor fan is out of service more than X minute, indoor fan restarts operation; If return air temperature remains be more than or equal to design temperature, then indoor fan is according to stopping X minute, the operation actuation cycle start and stop of Y minute.
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| CN201510706587.2A CN105241016B (en) | 2015-10-26 | 2015-10-26 | Multi-connected air conditioner indoor fan control device and method |
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| CN201510706587.2A CN105241016B (en) | 2015-10-26 | 2015-10-26 | Multi-connected air conditioner indoor fan control device and method |
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| CN105241016B CN105241016B (en) | 2018-04-17 |
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2015
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| US6397610B1 (en) * | 2001-05-01 | 2002-06-04 | Cohand Technology Co., Ltd. | Method for controlling air conditioner/heater by coil temperature |
| CN1888675A (en) * | 2005-06-27 | 2007-01-03 | 乐金电子(天津)电器有限公司 | Air conditioner heating operation indoor fan controlling device and controlling method thereof |
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| CN105241016B (en) | 2018-04-17 |
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