CN104534622A - Air conditioner anti-freezing control method and device - Google Patents
Air conditioner anti-freezing control method and device Download PDFInfo
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- CN104534622A CN104534622A CN201410811628.XA CN201410811628A CN104534622A CN 104534622 A CN104534622 A CN 104534622A CN 201410811628 A CN201410811628 A CN 201410811628A CN 104534622 A CN104534622 A CN 104534622A
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- Prior art keywords
- temperature
- air
- conditioner set
- sensitive bag
- antifreeze
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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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
- F24F11/62—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
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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
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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
- F24F11/41—Defrosting; Preventing freezing
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
Abstract
The invention discloses an air conditioner anti-freezing control method and device. The air conditioner anti-freezing control method comprises the steps of detecting a working mode of an air conditioning unit; selecting an anti-freezing mode corresponding to the working mode according to the working mode, wherein the anti-freezing mode is a control mode for conducting anti-freezing protection on the air conditioning unit in the working mode; controlling the anti-freezing protection conducted on the air conditioning unit according to the selected anti-freezing mode. By means of the air conditioner anti-freezing control method and device, the problem that the air conditioning unit is in the working modes except a heating mode and accordingly the air conditioning unit is easily frozen off is solved.
Description
Technical field
The present invention relates to field of air conditioning, in particular to a kind of air-conditioning antifreeze control method and device.
Background technology
Winter air-conditioner set be usually in heat supply mode, in order to indoor heating.Because winter temperature is low, in order to avoid air-conditioner set is freezing, usually need to open anti-frost protection to air-conditioner set.
But; inventor finds, existing air-conditioner set is only considered to arrange anti-frost protection in heat supply mode running status, performs anti-frost protection only by return air temperature; the non-operating state of heat supply mode and cooling, air vent mode all lack anti-frost protection, easily cause the situation that air-conditioner set is freezing.Such as, if user falsely drop when outdoor temperature is lower in the winter time refrigeration mode or unit be in off-mode and coil pipe does not put clean water when cause coil pipe freezing hidden danger.
For the problem that the mode of operation be in outside heat supply mode of air-conditioner set in prior art easily causes air-conditioner set freezing, at present effective solution is not yet proposed.
Summary of the invention
Main purpose of the present invention is to provide a kind of air-conditioning antifreeze control method and device, to solve the problem that the air-conditioner set mode of operation be in outside heat supply mode easily causes air-conditioner set freezing.
To achieve these goals, according to an aspect of the embodiment of the present invention, a kind of air-conditioning antifreeze control method is provided.Air-conditioning antifreeze control method according to the present invention comprises: detect the mode of operation residing for air-conditioner set; Select the anti-freezing pattern corresponding with described mode of operation according to described mode of operation, described anti-freezing pattern is the control mode of described air-conditioner set being carried out to anti-frost protection under described mode of operation; And control described air-conditioner set carry out anti-frost protection according to the anti-freezing pattern selected.
Further, control described air-conditioner set according to the anti-freezing pattern selected to carry out anti-frost protection and comprise: the temperature detecting antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger; The hot water valve of described air-conditioner set is controlled according to the temperature of described antifreeze temperature-sensitive bag and/or blower fan carries out anti-frost protection to described air-conditioner set according to the anti-freezing pattern selected.
Further, described mode of operation comprises: cooling mode and air vent mode, wherein, when detecting that described air-conditioner set is in described cooling mode or described air vent mode, control described air-conditioner set according to the anti-freezing pattern selected to carry out anti-frost protection and comprise: the temperature detecting antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger; Judge whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the first temperature threshold in the first Preset Time; If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described first temperature threshold in described Preset Time, then output alarm prompting, described alarm is for pointing out described air-conditioner set disorderly closedown.
Further, described mode of operation comprises: heat supply mode, wherein, when detecting that described air-conditioner set is in described heat supply mode, control described air-conditioner set according to the anti-freezing pattern selected to carry out anti-frost protection and comprise: the temperature detecting antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger; Judge whether described air-conditioner set is in running status; If judge that described air-conditioner set is in non-operating state, then judge whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time; If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described second temperature threshold in described second Preset Time, then close blower fan, and the hot water valve controlling described air-conditioner set is run with maximum opening; If judge that described air-conditioner set is in running status, then judge whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time; If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described 3rd temperature threshold in described 3rd Preset Time, then the hot water valve controlling described air-conditioner set is opened to maximum opening.
Further, described mode of operation comprises: shutdown mode, wherein, when detecting that described air-conditioner set is in described shutdown mode, control described air-conditioner set according to the anti-freezing pattern selected to carry out anti-frost protection and comprise: the temperature detecting antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger; By the temperature of described antifreeze temperature-sensitive bag and setting heat supply water temperature lower limit with set the heat supply water temperature upper limit and compare respectively; If the temperature of described antifreeze temperature-sensitive bag continues to be less than described setting heat supply water temperature lower limit in the 4th Preset Time, then the hot water valve controlling described air-conditioner set is opened to preset range; If the temperature of described antifreeze temperature-sensitive bag continues to be greater than the described setting heat supply water temperature upper limit in the 4th Preset Time, then the hot water valve controlling described air-conditioner set is opened to minimum aperture; And if the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described setting heat supply water temperature lower limit in the 4th Preset Time, and be more than or equal to the described setting heat supply water temperature upper limit, then the hot water valve controlling described air-conditioner set keeps current state.
To achieve these goals, according to the another aspect of the embodiment of the present invention, provide a kind of air-conditioning freezing protection control device.Air-conditioning freezing protection control device according to the present invention comprises: detecting unit, for detecting the mode of operation residing for air-conditioner set; Selection unit, for selecting the anti-freezing pattern corresponding with described mode of operation according to described mode of operation, described anti-freezing pattern is the control mode of described air-conditioner set being carried out to anti-frost protection under described mode of operation; And control unit, carry out anti-frost protection for controlling described air-conditioner set according to the anti-freezing pattern selected.
Further, described control unit comprises: first detection module, and for detecting the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger; First control module, for controlling the hot water valve of described air-conditioner set according to the anti-freezing pattern selected according to the temperature of described antifreeze temperature-sensitive bag and/or blower fan carries out anti-frost protection to described air-conditioner set.
Further, described mode of operation comprises: cooling mode and air vent mode, wherein, described control unit comprises: the second detection module, for when detecting that described air-conditioner set is in described cooling mode or described air vent mode, detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger; First judge module, for judging whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the first temperature threshold in the first Preset Time; Output module, if for judging that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described first temperature threshold in described Preset Time, then output alarm prompting, described alarm is for pointing out described air-conditioner set disorderly closedown.
Further, described mode of operation comprises: heat supply mode, wherein, described control unit comprises: the 3rd detection module, for when detecting that described air-conditioner set is in described heat supply mode, detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger; Second judge module, for judging whether described air-conditioner set is in running status; Second control module, if for judging that described air-conditioner set is in non-operating state, then judges whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time; If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described second temperature threshold in described second Preset Time, then close blower fan, and the hot water valve controlling described air-conditioner set is opened to maximum opening; 3rd control module, if for judging that described air-conditioner set is in running status, then judges whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time; If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described 3rd temperature threshold in described 3rd Preset Time, then the hot water valve controlling described air-conditioner set is opened to maximum opening.
Further, described mode of operation comprises: shutdown mode, wherein, described control unit comprises: the 4th detection module, for when detecting that described air-conditioner set is in described shutdown mode, detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger; Comparison module, for by the temperature of described antifreeze temperature-sensitive bag and setting heat supply water temperature lower limit with set the heat supply water temperature upper limit and compare respectively; 4th control module, if continue to be less than described setting heat supply water temperature lower limit in the 4th Preset Time for the temperature of described antifreeze temperature-sensitive bag, then the hot water valve controlling described air-conditioner set is opened to preset range; If the temperature of described antifreeze temperature-sensitive bag continues to be greater than the described setting heat supply water temperature upper limit in the 4th Preset Time, then the hot water valve controlling described air-conditioner set is opened to minimum aperture; If the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described setting heat supply water temperature lower limit in the 4th Preset Time, and is more than or equal to the described setting heat supply water temperature upper limit, then the hot water valve controlling described air-conditioner set keeps current state.
According to inventive embodiments; by detecting the mode of operation residing for air-conditioner set; the anti-freezing pattern corresponding with mode of operation is selected according to mode of operation; and carry out anti-frost protection according to the anti-freezing pattern control air-conditioner set selected; according to the control mode of the anti-frost protection under the various mode of operations pre-set; control air-conditioner set and carry out anti-frost protection; make air-conditioner set all can carry out anti-frost protection under various mode of operation, thus solve the problem that the air-conditioner set mode of operation be in outside heat supply mode easily causes air-conditioner set freezing.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the flow chart of the air-conditioning antifreeze control method according to the embodiment of the present invention;
Fig. 2 is the schematic diagram of the running environment of a kind of air-conditioning antifreeze control method according to the embodiment of the present invention;
Fig. 3 is the shutdown mode hot water valve working timing figure according to the embodiment of the present invention; And
Fig. 4 is the schematic diagram of the air-conditioning freezing protection control device according to the embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
The present invention program is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the embodiment of a part of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, should belong to the scope of protection of the invention.
It should be noted that, term " first ", " second " etc. in description of the present invention and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.Should be appreciated that the data used like this can be exchanged, in the appropriate case so that embodiments of the invention described herein.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those steps or unit that the process of series of steps or unit, method, system, product or equipment is not necessarily limited to clearly list, but can comprise clearly do not list or for intrinsic other step of these processes, method, product or equipment or unit.
Embodiments provide a kind of air-conditioning antifreeze control method.The method can be realized by the controller of air-conditioner set.
Fig. 1 is the flow chart of the air-conditioning antifreeze control method according to the embodiment of the present invention.As shown in Figure 1, to comprise step as follows for this air-conditioning antifreeze control method:
Step S102, detects the mode of operation residing for air-conditioner set.
The mode of operation of air-conditioner set can comprise heat supply mode, cooling mode, air vent mode and shutdown mode, and wherein, shutdown mode refers to that air-conditioner set is in off-mode or holding state.
Step S104, selects the anti-freezing pattern corresponding with mode of operation according to mode of operation.This anti-freezing pattern is the control mode of in the operational mode air-conditioner set being carried out to anti-frost protection.
Step S106, controls air-conditioner set according to the anti-freezing pattern selected and carries out anti-frost protection.
Arrange corresponding anti-freezing pattern for each mode of operation, that is to say under different mode of operations, air-conditioner set selects the control mode of loosening protection corresponding to mode of operation.Such as, under cooling mode or air vent mode, if the constant temperature of antifreeze temperature-sensitive bag is lower than certain threshold value, then think that air-conditioner set is due to the low causing trouble shutdown of temperature, output alarm is pointed out; Or, under heat supply mode, if the constant temperature of antifreeze temperature-sensitive bag is lower than certain threshold value, then control the aperture increasing hot water valve.
According to the embodiment of the present invention, by detecting the mode of operation residing for air-conditioner set, the anti-freezing pattern corresponding with mode of operation is selected according to mode of operation, and carry out anti-frost protection according to the anti-freezing pattern control air-conditioner set selected, according to the control mode of the anti-frost protection under the various mode of operations pre-set, control air-conditioner set and carry out anti-frost protection, make air-conditioner set all can carry out anti-frost protection under various mode of operation, thus solve the problem that the air-conditioner set mode of operation be in outside heat supply mode easily causes air-conditioner set freezing, even if make also to carry out anti-frost protection to air-conditioner set when user misoperation.
Preferably, carry out anti-frost protection according to the anti-freezing pattern control air-conditioner set selected to comprise: the temperature detecting antifreeze temperature-sensitive bag.Antifreeze temperature-sensitive bag is arranged on the heat exchanger of air-conditioner set, and antifreeze temperature-sensitive bag is for experiencing the water temperature of heat exchanger; According to the hot water valve of the temperature control air-conditioner set of antifreeze temperature-sensitive bag and/or blower fan, anti-frost protection is carried out to air-conditioner set according to the anti-freezing pattern selected.
Because hot water valve and blower fan can the temperature of adjusting air conditioning group, the embodiment of the present invention can by controlling hot water valve and/or blower fan carry out anti-frost protection.Particularly, as shown in Figure 2, mainboard controller 20 detects the temperature of antifreeze temperature-sensitive bag 10, and controls blower fan and/or hot water valve carries out anti-frost protection according to the temperature detected.
Preferably, mode of operation comprises: cooling mode and air vent mode, wherein, when detecting that air-conditioner set is in cooling mode or air vent mode, carry out anti-frost protection according to the anti-freezing pattern control air-conditioner set selected to comprise: the temperature detecting antifreeze temperature-sensitive bag, antifreeze temperature-sensitive bag is arranged on the heat exchanger of air-conditioner set, and antifreeze temperature-sensitive bag is for experiencing the water temperature of heat exchanger; Judge whether the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the first temperature threshold in the first Preset Time; If judge that the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the first temperature threshold in Preset Time, then output alarm prompting, alarm is for pointing out air-conditioner set disorderly closedown.
After the temperature antifreeze temperature-sensitive bag being detected, if this temperature continues to be less than or equal to the first temperature threshold in the first Preset Time, then think that air-conditioner set is due to the low causing trouble shutdown of temperature, output alarm is pointed out.Wherein, the first temperature threshold can be anti-frost protection temperature, when the constant temperature of antifreeze temperature-sensitive bag is less than or equal to this temperature value, carries out anti-frost protection.If when detecting that the temperature of antifreeze temperature-sensitive bag continues to exceed the first temperature threshold uniform temperature within a period of time, then manually eliminate fault alarm.
Such as, when continuing within 10 seconds, to detect that the temperature Tf≤Td of antifreeze temperature-sensitive bag then thinks disorderly closedown, alert process; When continuing Tf > Td+ Δ Td within 10 seconds, to be detected, fault alarm can be eliminated by manual confirmation.Wherein, Tf is the temperature of antifreeze temperature-sensitive bag, and Td is anti-frost protection temperature, Δ Td be antifreeze can be poor.
According to the embodiment of the present invention; by being arranged on the control mode of the anti-frost protection under air vent mode or cooling mode; realize air-conditioner set and all can carry out anti-frost protection under air vent mode or cooling mode, prevent user when environment temperature is lower due to maloperation make air-conditioner set be in cooling mode or air vent mode under cause air-conditioner set freezing situation occur.
Preferably, mode of operation comprises: heat supply mode, wherein, when detecting that air-conditioner set is in heat supply mode, carry out anti-frost protection according to the anti-freezing pattern control air-conditioner set selected to comprise: the temperature detecting antifreeze temperature-sensitive bag, antifreeze temperature-sensitive bag is arranged on the heat exchanger of air-conditioner set, and antifreeze temperature-sensitive bag is for experiencing the water temperature of heat exchanger; Judge whether air-conditioner set is in running status; If judge that air-conditioner set is in non-operating state, then judge whether the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time; If judge that the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time, then close blower fan, and the hot water valve controlling air-conditioner set is opened to maximum opening; If judge that air-conditioner set is in running status, then judge whether the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time; If judge that the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time, then the hot water valve controlling air-conditioner set is opened to maximum opening.
Under heat supply mode, air-conditioner set can be in two states, and one is running status, one is non-operating state, wherein, when air-conditioner set is in non-operating state, judge whether antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time; If so, then show that the water temperature of the heat exchanger of air-conditioner set is too low, need to continue to it protection that heats up, then close blower fan, and the hot water valve controlling air-conditioner set is opened to maximum opening, control hot water valve and run with maximum opening, and perform corresponding warning; Otherwise, continue to be greater than the second temperature threshold if antifreeze temperature-sensitive wraps in the second Preset Time, and exceed the second temperature threshold certain value, then can confirm that the water temperature of heat exchanger gos up, can not be damaged by frost, then operation of can again starting shooting.
When air-conditioner set is in running status, judge whether antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time; If so, then show that the water temperature of the heat exchanger of air-conditioner set is too low, need to continue to it protection that heats up, then the hot water valve controlling air-conditioner set is opened to maximum opening, controls hot water valve and runs with maximum opening, and performs corresponding warning; Otherwise continue to be greater than the 3rd temperature threshold if antifreeze temperature-sensitive wraps in the 3rd Preset Time, and exceed the 3rd temperature threshold certain value, then can confirm that the water temperature of heat exchanger gos up, hot water valve recovers the corresponding off-mode of heat supply mode.
Such as, if the non-off-mode of unit, when continuing within 10 seconds, to detect antifreeze temperature-sensitive bag temperature Tf≤anti-frost protection temperature Td, then perform: Blowing stopper simultaneously; Hot water valve forces to reach maximum opening 100%; Perform warning.When continuing 10 seconds and detecting Tf > Td+ Δ Td, and after manual confirmation elimination fault, operation of can again starting shooting.
If unit is at off-mode, when continuing within 10 seconds, to detect antifreeze temperature-sensitive bag temperature Tf≤anti-frost protection temperature Td, then perform: hot water valve forces to reach maximum opening 100% simultaneously; Perform warning.When continuing 10 seconds and detecting Tf > Td+ Δ Td, and after manual confirmation elimination fault, hot water valve recovers the corresponding off-mode of heat supply mode.
According to the embodiment of the present invention, being in the control mode of running status and anti-frost protection corresponding to non-operating state by arranging air-conditioner set respectively in the heating mode, effectively avoiding air-conditioner set in this mode to occur freezing situation.
It should be noted that the first preset temperature in the above embodiment of the present invention, the second preset temperature, the 3rd preset temperature can be all unequal, or part is equal, or it is all unequal, first temperature threshold, the first temperature threshold, the first temperature threshold can be all unequal, or part is equal, or all unequal.
Preferably, mode of operation comprises: shutdown mode, wherein, when detecting that air-conditioner set is in shutdown mode, carry out anti-frost protection according to the anti-freezing pattern control air-conditioner set selected to comprise: the temperature detecting antifreeze temperature-sensitive bag, antifreeze temperature-sensitive bag is arranged on the heat exchanger of air-conditioner set, and antifreeze temperature-sensitive bag is for experiencing the water temperature of heat exchanger; By the temperature of antifreeze temperature-sensitive bag and setting heat supply water temperature lower limit Th1 with set heat supply water temperature upper limit Th2 and compare respectively; If the temperature of antifreeze temperature-sensitive bag continues to be less than setting heat supply water temperature lower limit Th1 in the 4th Preset Time, then the hot water valve controlling air-conditioner set is opened to preset range; If the temperature of antifreeze temperature-sensitive bag continues to be greater than setting heat supply water temperature upper limit Th2 in the 4th Preset Time, then the hot water valve controlling air-conditioner set is opened to minimum aperture; And if the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to setting heat supply water temperature lower limit Th1 in the 4th Preset Time, and be more than or equal to setting heat supply water temperature upper limit Th2, then the hot water valve controlling air-conditioner set keeps current state.
Such as, after air-conditioner set shutdown puts in place, compare according to the antifreeze temperature Tf detected and setting heat supply water temperature lower limit Th1, heat supply water temperature upper limit Th2, automatically control the aperture of hot water valve, as shown in Figure 3:
When a) detecting antifreeze temperature-sensitive bag temperature Tf < Th1 when continuous 10 seconds, hot water valve is opened to 50% automatically;
When b) detecting antifreeze temperature-sensitive bag temperature Tf > Th2 when continuous 10 seconds, the minimum aperture of hot water valve automatic closing water valve;
C) detected antifreeze temperature-sensitive bag temperature Tf to meet when continuous 10 seconds: during Th1≤Tf≤Th2, hot water valve maintains current state.
According to the embodiment of the present invention, when air-conditioner set is in shutdown mode, controller and hot water valve are still in running order, and in order to carry out anti-frost protection, under avoiding shutdown mode, freezing situation appears in air-conditioner set.
The embodiment of the present invention additionally provides a kind of air-conditioning freezing protection control device.This device can realize its function by air-conditioner set.It should be noted that, the air-conditioning freezing protection control device of the embodiment of the present invention may be used for performing the air-conditioning antifreeze control method that the embodiment of the present invention provides, and the air-conditioning freezing protection control device that the air-conditioning antifreeze control method of the embodiment of the present invention also can be provided by the embodiment of the present invention performs.
Fig. 4 is the schematic diagram of the air-conditioning freezing protection control device according to the embodiment of the present invention.As shown in Figure 4, this air-conditioning freezing protection control device comprises: detecting unit 401, selection unit 402 and control unit 403.
Detecting unit 401 surveys the mode of operation residing for air-conditioner set.
The mode of operation of air-conditioner set can comprise heat supply mode, cooling mode, air vent mode and shutdown mode, and wherein, shutdown mode refers to that air-conditioner set is in off-mode or holding state.
Selection unit 402 selects the anti-freezing pattern corresponding with mode of operation according to mode of operation, and anti-freezing pattern is the control mode of in the operational mode air-conditioner set being carried out to anti-frost protection.
Control unit 403 controls air-conditioner set according to the anti-freezing pattern selected and carries out anti-frost protection.
Arrange corresponding anti-freezing pattern for each mode of operation, that is to say under different mode of operations, air-conditioner set selects the control mode of loosening protection corresponding to mode of operation.Such as, under cooling mode or air vent mode, if the constant temperature of antifreeze temperature-sensitive bag is lower than certain threshold value, then think that air-conditioner set is due to the low causing trouble shutdown of temperature, output alarm is pointed out; Or, under heat supply mode, if the constant temperature of antifreeze temperature-sensitive bag is lower than certain threshold value, then control the aperture increasing hot water valve.
According to the embodiment of the present invention, by detecting the mode of operation residing for air-conditioner set, the anti-freezing pattern corresponding with mode of operation is selected according to mode of operation, and carry out anti-frost protection according to the anti-freezing pattern control air-conditioner set selected, according to the control mode of the anti-frost protection under the various mode of operations pre-set, control air-conditioner set and carry out anti-frost protection, make air-conditioner set all can carry out anti-frost protection under various mode of operation, thus solve the problem that the air-conditioner set mode of operation be in outside heat supply mode easily causes air-conditioner set freezing, even if make also to carry out anti-frost protection to air-conditioner set when user misoperation.
Preferably, control unit comprises: first detection module, and for detecting the temperature of antifreeze temperature-sensitive bag, antifreeze temperature-sensitive bag is arranged on the heat exchanger of air-conditioner set, and antifreeze temperature-sensitive bag is for experiencing the water temperature of heat exchanger; First control module, for carrying out anti-frost protection according to the hot water valve of the temperature control air-conditioner set of antifreeze temperature-sensitive bag and/or blower fan to air-conditioner set according to the anti-freezing pattern selected.
Because hot water valve and blower fan can the temperature of adjusting air conditioning group, the embodiment of the present invention can by controlling hot water valve and/or blower fan carry out anti-frost protection.Particularly, as shown in Figure 2, mainboard controller 20 detects the temperature of antifreeze temperature-sensitive bag 10, and controls blower fan 30 and/or hot water valve 40 carries out anti-frost protection according to the temperature detected.
Preferably, mode of operation comprises: cooling mode and air vent mode, wherein, control unit comprises: the second detection module, for when detecting that air-conditioner set is in cooling mode or air vent mode, detect the temperature of antifreeze temperature-sensitive bag, antifreeze temperature-sensitive bag is arranged on the heat exchanger of air-conditioner set, and antifreeze temperature-sensitive bag is for experiencing the water temperature of heat exchanger; First judge module, for judging whether the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the first temperature threshold in the first Preset Time; Output module, if for judging that the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the first temperature threshold in Preset Time, then output alarm prompting, alarm is for pointing out air-conditioner set disorderly closedown.
After the temperature antifreeze temperature-sensitive bag being detected, if this temperature continues to be less than or equal to the first temperature threshold in the first Preset Time, then think that air-conditioner set is due to the low causing trouble shutdown of temperature, output alarm is pointed out.Wherein, the first temperature threshold can be anti-frost protection temperature, when the constant temperature of antifreeze temperature-sensitive bag is less than or equal to this temperature value, carries out anti-frost protection.If when detecting that the temperature of antifreeze temperature-sensitive bag continues to exceed the first temperature threshold uniform temperature within a period of time, then manually eliminate fault alarm.
Such as, when continuing within 10 seconds, to detect that the temperature Tf≤Td of antifreeze temperature-sensitive bag then thinks disorderly closedown, alert process; When continuing Tf > Td+ Δ Td within 10 seconds, to be detected, fault alarm can be eliminated by manual confirmation.Wherein, Tf is the temperature of antifreeze temperature-sensitive bag, and Td is anti-frost protection temperature, Δ Td be antifreeze can be poor.
Preferably, mode of operation comprises: heat supply mode, wherein, control unit comprises: the 3rd detection module, for when detecting that air-conditioner set is in heat supply mode, detect the temperature of antifreeze temperature-sensitive bag, antifreeze temperature-sensitive bag is arranged on the heat exchanger of air-conditioner set, and antifreeze temperature-sensitive bag is for experiencing the water temperature of heat exchanger; Second judge module, for judging whether air-conditioner set is in running status; Second control module, if for judging that air-conditioner set is in non-operating state, then judges whether the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time; If judge that the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time, then close blower fan, and the hot water valve controlling air-conditioner set is opened to maximum opening; 3rd control module, if for judging that air-conditioner set is in running status, then judges whether the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time; If judge that the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time, then the hot water valve controlling air-conditioner set is opened to maximum opening.
Under heat supply mode, air-conditioner set can be in two states, and one is running status, one is non-operating state, wherein, when air-conditioner set is in non-operating state, judge whether antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time; If so, then show that the water temperature of the heat exchanger of air-conditioner set is too low, need to continue to it protection that heats up, then close blower fan, and the hot water valve controlling air-conditioner set is opened to maximum opening, control hot water valve and run with maximum opening, and perform corresponding warning; Otherwise, continue to be greater than the second temperature threshold if antifreeze temperature-sensitive wraps in the second Preset Time, and exceed the second temperature threshold certain value, then can confirm that the water temperature of heat exchanger gos up, can not be damaged by frost, then operation of can again starting shooting.
When air-conditioner set is in running status, judge whether antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time; If so, then show that the water temperature of the heat exchanger of air-conditioner set is too low, need to continue to it protection that heats up, then the hot water valve controlling air-conditioner set is opened to maximum opening, controls hot water valve and runs with maximum opening, and performs corresponding warning; Otherwise continue to be greater than the 3rd temperature threshold if antifreeze temperature-sensitive wraps in the 3rd Preset Time, and exceed the 3rd temperature threshold certain value, then can confirm that the water temperature of heat exchanger gos up, hot water valve recovers the corresponding off-mode of heat supply mode.
Such as, if the non-off-mode of unit, when continuing within 10 seconds, to detect antifreeze temperature-sensitive bag temperature Tf≤anti-frost protection temperature Td, then perform: Blowing stopper simultaneously; Hot water valve forces to reach maximum opening 100%; Perform warning.When continuing 10 seconds and detecting Tf > Td+ Δ Td, and after manual confirmation elimination fault, operation of can again starting shooting.
If unit is at off-mode, when continuing within 10 seconds, to detect antifreeze temperature-sensitive bag temperature Tf≤anti-frost protection temperature Td, then perform: hot water valve forces to reach maximum opening 100% simultaneously; Perform warning.When continuing 10 seconds and detecting Tf > Td+ Δ Td, and after manual confirmation elimination fault, hot water valve recovers the corresponding off-mode of heat supply mode.
It should be noted that the first preset temperature in the above embodiment of the present invention, the second preset temperature, the 3rd preset temperature can be all unequal, or part is equal, or it is all unequal, first temperature threshold, the first temperature threshold, the first temperature threshold can be all unequal, or part is equal, or all unequal.
Preferably, mode of operation comprises: shutdown mode, wherein, control unit comprises: the 4th detection module, for when detecting that air-conditioner set is in shutdown mode, detect the temperature of antifreeze temperature-sensitive bag, antifreeze temperature-sensitive bag is arranged on the heat exchanger of air-conditioner set, and antifreeze temperature-sensitive bag is for experiencing the water temperature of heat exchanger; Comparison module, for by the temperature of antifreeze temperature-sensitive bag and setting heat supply water temperature lower limit with set the heat supply water temperature upper limit and compare respectively; 4th control module, if continue to be less than setting heat supply water temperature lower limit in the 4th Preset Time for the temperature of antifreeze temperature-sensitive bag, then the hot water valve controlling air-conditioner set is opened to preset range; If the temperature of antifreeze temperature-sensitive bag continues to be greater than the setting heat supply water temperature upper limit in the 4th Preset Time, then the hot water valve controlling air-conditioner set is opened to minimum aperture; If the temperature of antifreeze temperature-sensitive bag continues to be less than or equal to setting heat supply water temperature lower limit in the 4th Preset Time, and is more than or equal to the setting heat supply water temperature upper limit, then the hot water valve controlling air-conditioner set keeps current state.
Such as, after air-conditioner set shutdown puts in place, compare according to the antifreeze temperature Tf detected and setting heat supply water temperature lower limit Th1, heat supply water temperature upper limit Th2, automatically control the aperture of hot water valve, as shown in Figure 3:
When a) detecting antifreeze temperature-sensitive bag temperature Tf < Th1 when continuous 10 seconds, hot water valve is opened to 50% automatically;
When b) detecting antifreeze temperature-sensitive bag temperature Tf > Th2 when continuous 10 seconds, the minimum aperture of hot water valve automatic closing water valve;
C) detected antifreeze temperature-sensitive bag temperature Tf to meet when continuous 10 seconds: during Th1≤Tf≤Th2, hot water valve maintains current state.
It should be noted that, for aforesaid each embodiment of the method, in order to simple description, therefore it is all expressed as a series of combination of actions, but those skilled in the art should know, the present invention is not by the restriction of described sequence of movement, because according to the present invention, some step can adopt other orders or carry out simultaneously.Secondly, those skilled in the art also should know, the embodiment described in description all belongs to preferred embodiment, and involved action and module might not be that the present invention is necessary.
In the above-described embodiments, the description of each embodiment is all emphasized particularly on different fields, in certain embodiment, there is no the part described in detail, can see the associated description of other embodiments.
In several embodiments that the application provides, should be understood that, disclosed device, the mode by other realizes.Such as, device embodiment described above is only schematic, the such as division of described unit, be only a kind of logic function to divide, actual can have other dividing mode when realizing, such as multiple unit or assembly can in conjunction with or another system can be integrated into, or some features can be ignored, or do not perform.Another point, shown or discussed coupling each other or direct-coupling or communication connection can be by some interfaces, and the INDIRECT COUPLING of device or unit or communication connection can be electrical or other form.
The described unit illustrated as separating component or can may not be and physically separates, and the parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed on multiple NE.Some or all of unit wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, also can be that the independent physics of unit exists, also can two or more unit in a unit integrated.Above-mentioned integrated unit both can adopt the form of hardware to realize, and the form of SFU software functional unit also can be adopted to realize.
If described integrated unit using the form of SFU software functional unit realize and as independently production marketing or use time, can be stored in a computer read/write memory medium.Based on such understanding, the part that technical scheme of the present invention contributes to prior art in essence in other words or all or part of of this technical scheme can embody with the form of software product, this computer software product is stored in a storage medium, comprises all or part of step of some instructions in order to make a computer equipment (can be personal computer, mobile terminal, server or the network equipment etc.) perform method described in each embodiment of the present invention.And aforesaid storage medium comprises: USB flash disk, read-only storage (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), portable hard drive, magnetic disc or CD etc. various can be program code stored medium.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an air-conditioning antifreeze control method, is characterized in that, comprising:
Detect the mode of operation residing for air-conditioner set;
Select the anti-freezing pattern corresponding with described mode of operation according to described mode of operation, described anti-freezing pattern is the control mode of described air-conditioner set being carried out to anti-frost protection under described mode of operation; And
Control described air-conditioner set according to the anti-freezing pattern selected and carry out anti-frost protection.
2. air-conditioning antifreeze control method according to claim 1, is characterized in that, controls described air-conditioner set carry out anti-frost protection and comprise according to the anti-freezing pattern selected:
Detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger;
The hot water valve of described air-conditioner set is controlled according to the temperature of described antifreeze temperature-sensitive bag and/or blower fan carries out anti-frost protection to described air-conditioner set according to the anti-freezing pattern selected.
3. air-conditioning antifreeze control method according to claim 1; it is characterized in that; described mode of operation comprises: cooling mode and air vent mode; wherein; when detecting that described air-conditioner set is in described cooling mode or described air vent mode, controlling described air-conditioner set according to the anti-freezing pattern selected and carrying out anti-frost protection and comprise:
Detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger;
Judge whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the first temperature threshold in the first Preset Time;
If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described first temperature threshold in described Preset Time, then output alarm prompting, described alarm is for pointing out described air-conditioner set disorderly closedown.
4. air-conditioning antifreeze control method according to claim 1; it is characterized in that, described mode of operation comprises: heat supply mode, wherein; when detecting that described air-conditioner set is in described heat supply mode, controlling described air-conditioner set according to the anti-freezing pattern selected and carrying out anti-frost protection and comprise:
Detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger;
Judge whether described air-conditioner set is in running status;
If judge that described air-conditioner set is in non-operating state, then judge whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time; If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described second temperature threshold in described second Preset Time, then close blower fan, and the hot water valve controlling described air-conditioner set is run with maximum opening;
If judge that described air-conditioner set is in running status, then judge whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time; If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described 3rd temperature threshold in described 3rd Preset Time, then the hot water valve controlling described air-conditioner set is opened to maximum opening.
5. air-conditioning antifreeze control method according to claim 1; it is characterized in that, described mode of operation comprises: shutdown mode, wherein; when detecting that described air-conditioner set is in described shutdown mode, controlling described air-conditioner set according to the anti-freezing pattern selected and carrying out anti-frost protection and comprise:
Detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger;
By the temperature of described antifreeze temperature-sensitive bag and setting heat supply water temperature lower limit with set the heat supply water temperature upper limit and compare respectively;
If the temperature of described antifreeze temperature-sensitive bag continues to be less than described setting heat supply water temperature lower limit in the 4th Preset Time, then the hot water valve controlling described air-conditioner set is opened to preset range;
If the temperature of described antifreeze temperature-sensitive bag continues to be greater than the described setting heat supply water temperature upper limit in the 4th Preset Time, then the hot water valve controlling described air-conditioner set is opened to minimum aperture; And
If the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described setting heat supply water temperature lower limit in the 4th Preset Time, and is more than or equal to the described setting heat supply water temperature upper limit, then the hot water valve controlling described air-conditioner set keeps current state.
6. an air-conditioning freezing protection control device, is characterized in that, comprising:
Detecting unit, for detecting the mode of operation residing for air-conditioner set;
Selection unit, for selecting the anti-freezing pattern corresponding with described mode of operation according to described mode of operation, described anti-freezing pattern is the control mode of described air-conditioner set being carried out to anti-frost protection under described mode of operation; And
Control unit, carries out anti-frost protection for controlling described air-conditioner set according to the anti-freezing pattern selected.
7. air-conditioning freezing protection control device according to claim 6, is characterized in that, described control unit comprises:
First detection module, for detecting the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger;
First control module, for controlling the hot water valve of described air-conditioner set according to the anti-freezing pattern selected according to the temperature of described antifreeze temperature-sensitive bag and/or blower fan carries out anti-frost protection to described air-conditioner set.
8. air-conditioning freezing protection control device according to claim 6, is characterized in that, described mode of operation comprises: cooling mode and air vent mode, and wherein, described control unit comprises:
Second detection module, for when detecting that described air-conditioner set is in described cooling mode or described air vent mode, detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger;
First judge module, for judging whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the first temperature threshold in the first Preset Time;
Output module, if for judging that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described first temperature threshold in described Preset Time, then output alarm prompting, described alarm is for pointing out described air-conditioner set disorderly closedown.
9. air-conditioning freezing protection control device according to claim 6, is characterized in that, described mode of operation comprises: heat supply mode, and wherein, described control unit comprises:
3rd detection module, for when detecting that described air-conditioner set is in described heat supply mode, detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger;
Second judge module, for judging whether described air-conditioner set is in running status;
Second control module, if for judging that described air-conditioner set is in non-operating state, then judges whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the second temperature threshold in the second Preset Time; If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described second temperature threshold in described second Preset Time, then close blower fan, and the hot water valve controlling described air-conditioner set is opened to maximum opening;
3rd control module, if for judging that described air-conditioner set is in running status, then judges whether the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to the 3rd temperature threshold in the 3rd Preset Time; If judge that the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described 3rd temperature threshold in described 3rd Preset Time, then the hot water valve controlling described air-conditioner set is opened to maximum opening.
10. air-conditioning freezing protection control device according to claim 6, is characterized in that, described mode of operation comprises: shutdown mode, and wherein, described control unit comprises:
4th detection module, for when detecting that described air-conditioner set is in described shutdown mode, detect the temperature of antifreeze temperature-sensitive bag, described antifreeze temperature-sensitive bag is arranged on the heat exchanger of described air-conditioner set, and described antifreeze temperature-sensitive bag is for experiencing the water temperature of described heat exchanger;
Comparison module, for by the temperature of described antifreeze temperature-sensitive bag and setting heat supply water temperature lower limit with set the heat supply water temperature upper limit and compare respectively;
4th control module, if continue to be less than described setting heat supply water temperature lower limit in the 4th Preset Time for the temperature of described antifreeze temperature-sensitive bag, then the hot water valve controlling described air-conditioner set is opened to preset range; If the temperature of described antifreeze temperature-sensitive bag continues to be greater than the described setting heat supply water temperature upper limit in the 4th Preset Time, then the hot water valve controlling described air-conditioner set is opened to minimum aperture; If the temperature of described antifreeze temperature-sensitive bag continues to be less than or equal to described setting heat supply water temperature lower limit in the 4th Preset Time, and is more than or equal to the described setting heat supply water temperature upper limit, then the hot water valve controlling described air-conditioner set keeps current state.
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| CN110017568A (en) * | 2019-04-18 | 2019-07-16 | 宁波奥克斯电气股份有限公司 | A kind of fan coil antifreeze control method, device and air conditioner |
| CN110017568B (en) * | 2019-04-18 | 2021-02-02 | 宁波奥克斯电气股份有限公司 | Fan coil anti-freezing control method and device and air conditioner |
| CN110553439A (en) * | 2019-08-29 | 2019-12-10 | 浙江中广电器股份有限公司 | Control method for preventing freezing during refrigeration start of air source variable frequency heat pump (cold water) unit |
| CN114413417A (en) * | 2021-12-22 | 2022-04-29 | 珠海格力电器股份有限公司 | Anti-freezing control method and device, storage medium and electronic equipment |
| CN114413417B (en) * | 2021-12-22 | 2023-02-17 | 珠海格力电器股份有限公司 | Anti-freezing control method and device, storage medium and electronic equipment |
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