CN104422076B - Air-conditioner refrigeration unit and its antifreeze control method - Google Patents
Air-conditioner refrigeration unit and its antifreeze control method Download PDFInfo
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- CN104422076B CN104422076B CN201310368310.4A CN201310368310A CN104422076B CN 104422076 B CN104422076 B CN 104422076B CN 201310368310 A CN201310368310 A CN 201310368310A CN 104422076 B CN104422076 B CN 104422076B
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a kind of air-conditioner refrigeration unit and its antifreeze control method, the air-conditioner refrigeration unit includes at least three temperature sensors.The antifreeze control method includes the temperature of collecting temperature sensor, and anti-freezing pattern is entered when temperature sensor breaks down；Then enter anti-freezing pattern when at least one temperature of the temperature for being collected is less than the first temperature limit；Anti-freezing pattern is then exited when the temperature for being collected is all higher than second temperature limit value.Air-conditioner refrigeration unit of the invention is provided with temperature sensor in the water inlet of case tube heat exchanger, delivery port and package, avoid the antifreeze failure caused because certain temperature sensor drift or failure occurs, case tube heat exchanger can be carried out effectively it is antifreeze, improve the reliability of the case tube heat exchanger of air-conditioner refrigeration unit.
Description
Technical field
The present invention relates to field of air conditioning, more particularly to a kind of air-conditioner refrigeration unit and its antifreeze control method.
Background technology
Case tube heat exchanger being used the heat exchanger of current air-conditioner refrigeration unit, this heat exchanger is in the relatively low ring of temperature more
If without in time water therein is discharged during such as winter operation under border, might be by bursting by freezing.In addition, if refrigerant exchanged heat
Greatly, make the temperature of chilled water too low, it is also possible to cause case tube heat exchanger to rupture.
The case tube heat exchanger of general air-conditioner refrigeration unit carries out antifreeze detection only with an antifreeze temperature-sensitive bag at present, should
Antifreeze temperature-sensitive bag is generally located in the package of case tube heat exchanger.When antifreeze temperature is less than certain when antifreeze control method is shutdown
Water pump is opened during limit value antifreeze, exit antifreeze when antifreeze temperature is more than certain limit value, switched off the pump.But, if this is antifreeze
There is drift or failure and causes the antifreeze temperature for detecting inaccurate in temperature-sensitive bag, can cause antifreeze control failure and then occur
The problems such as rupture of case tube heat exchanger, influence the use of air-conditioner set.
Therefore it provides a kind of antifreeze control method that can accurately control air-conditioner refrigeration unit is that those skilled in the art urgently solve
Problem certainly.
The content of the invention
For the technical problem that the antifreeze control for solving air-conditioner refrigeration unit may fail, the present invention provides a kind of new
Air-conditioner refrigeration unit and its antifreeze control method, the air-conditioner refrigeration unit set three temperature sensors and change detecting package
The temperature of hot device, can guarantee that and be exactly into anti-freezing pattern, it is to avoid temperature sensor temperature occur inaccurate so that antifreeze control
The problem of failure.
Technical scheme is as follows：
A kind of air-conditioner refrigeration unit, including the first temperature sensor of the water inlet of case tube heat exchanger is arranged on, it is used for
Detection inflow temperature；
The second temperature sensor of the delivery port of case tube heat exchanger is arranged on, for detecting leaving water temperature；
The three-temperature sensor in the package of case tube heat exchanger is arranged on, for temperature in the package for detecting case tube heat exchanger
Degree；
Also include deicing controllor, electrically connect first temperature sensor, second temperature sensor and the 3rd temperature and pass
Sensor, for the temperature detected according to first temperature sensor, second temperature sensor and three-temperature sensor, control
Make whether the air-conditioner refrigeration unit enters anti-freezing pattern；When first temperature sensor, second temperature sensor and
Three-temperature sensor breaks down and then enters anti-freezing pattern；When without break down temperature sensor detection temperature in extremely
A rare temperature then enters anti-freezing pattern when being less than the first temperature limit；Detected when without the temperature sensor for breaking down
Temperature be all higher than then exiting anti-freezing pattern during second temperature limit value, wherein the second temperature limit value be more than first temperature
Limit value.
Wherein in one embodiment, the deicing controllor includes that acquisition module, the first judge module, second judge mould
Block and the 3rd judge module；
The acquisition module is used to gather first temperature sensor, second temperature sensor and three-temperature sensor
The temperature of detection；
The temperature that first judge module is used to be gathered according to acquisition module judges the first temperature sensor, second temperature
Whether sensor and three-temperature sensor break down, if the first temperature sensor, second temperature sensor and the 3rd temperature
Degree sensor breaks down, then control air-conditioner refrigeration unit to enter anti-freezing pattern, will otherwise be gathered without appearance event
The temperature of the temperature sensor detection of barrier is sent to the second judge module；
Second judge module is used to be detected without the temperature sensor for breaking down according to what acquisition module was gathered
Temperature judge the temperature of the collection whether at least one temperature be less than the first temperature limit, if it is control air-conditioner
Refrigeration unit enters anti-freezing pattern, otherwise sends to the 3rd judge module temperature；
3rd judge module is used to be detected without the temperature sensor for breaking down according to what acquisition module was gathered
Temperature judge whether the temperature of the collection is all higher than second temperature limit value, if it is control air-conditioner refrigeration unit exit
Anti-freezing pattern, otherwise keeps present mode of operation.
A kind of antifreeze control method of air-conditioner refrigeration unit, comprises the following steps：
S100：Gather the temperature that the first temperature sensor, second temperature sensor and three-temperature sensor are detected；
S200：Judge whether first temperature sensor, second temperature sensor and three-temperature sensor event occur
Barrier, if first temperature sensor, second temperature sensor and three-temperature sensor break down, controls air-conditioning
Device refrigeration unit enters anti-freezing pattern, and otherwise carrying out next step to the temperature without the temperature sensor detection broken down sentences
It is disconnected；
S300：Judge whether at least one temperature is less than the temperature without the temperature sensor for breaking down detection
First temperature limit, if it is controls air-conditioner refrigeration unit to enter anti-freezing pattern, otherwise carries out next step judgement；
S400：Judge whether the temperature without the temperature sensor for breaking down detection is all higher than second temperature limit
Value, if it is controls air-conditioner refrigeration unit to exit anti-freezing pattern, otherwise keeps present mode of operation.
Wherein in one embodiment, the S200 judges first temperature sensor, second temperature sensor and
Whether three-temperature sensor breaks down, if first temperature sensor, second temperature sensor and the 3rd TEMP
Device breaks down, then control air-conditioner refrigeration unit to enter anti-freezing pattern, otherwise to without the temperature sensor for breaking down
The temperature of detection carries out next step judgement, comprises the following steps：
S201：Judge whether the first temperature sensor breaks down, if yes then enter S202, otherwise into step
S300；
S202：Judge whether second temperature sensor breaks down, if yes then enter step S203, otherwise into step
S300；
S203：Judge whether three-temperature sensor breaks down, if yes then enter anti-freezing pattern, otherwise into step
S300。
Wherein in one embodiment, the step S300 judges the temperature sensor detection without failure
Whether at least one temperature is less than the first temperature limit to temperature, if it is controls air-conditioner refrigeration unit to enter antifreeze mould
Formula, otherwise carries out next step judgement, comprises the following steps:
S301：Judge that whether inflow temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter
Anti-freezing pattern, otherwise into step S302；
S302：Judge that whether leaving water temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter
Anti-freezing pattern, otherwise into step S303；
S303：Judge that whether temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter in package
Enter anti-freezing pattern, otherwise into step S400.
Wherein in one embodiment, the S400 judges the temperature without the temperature sensor for breaking down detection
Whether second temperature limit value is all higher than, if it is controls air-conditioner refrigeration unit to exit anti-freezing pattern, otherwise keep current fortune
Row mode, comprises the following steps：
S401：Judge that whether inflow temperature, less than second temperature limit value, if it is keeps present mode of operation, otherwise enter
Enter step S402；
S402：Judge that whether leaving water temperature, less than second temperature limit value, if it is keeps present mode of operation, otherwise enter
Enter step S403；
S403：Judge that whether temperature, less than second temperature limit value, if it is keeps present mode of operation, otherwise in package
Control air-conditioner refrigeration unit exits anti-freezing pattern.
The beneficial effects of the invention are as follows：
Air-conditioner refrigeration unit of the invention is provided with temperature in the water inlet of case tube heat exchanger, delivery port and package
Sensor, it is to avoid the antifreeze failure caused because certain temperature sensor drift or failure occurs, can change package
Hot device carry out effectively it is antifreeze, improve the reliability of the case tube heat exchanger of air-conditioner refrigeration unit.
Brief description of the drawings
Below in conjunction with specific drawings and the specific embodiments, the present invention will be described in further detail.
Fig. 1 is the schematic flow sheet of one embodiment of the antifreeze control method of air-conditioner refrigeration unit of the invention.
Specific embodiment
It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase
Mutually combination.Describe the present invention in detail below with reference to the accompanying drawings and in conjunction with the embodiments.
A kind of air-conditioner refrigeration unit, including the first temperature sensor of the water inlet of case tube heat exchanger is arranged on, it is used for
Detection inflow temperature；
The second temperature sensor of the delivery port of case tube heat exchanger is arranged on, for detecting leaving water temperature；
The three-temperature sensor in the package of case tube heat exchanger is arranged on, for temperature in the package for detecting case tube heat exchanger
Degree；
Also include deicing controllor, electrically connect the first temperature sensor, second temperature sensor and three-temperature sensor,
For the temperature detected according to the first temperature sensor, second temperature sensor and three-temperature sensor, air-conditioner is controlled
Whether refrigeration unit enters anti-freezing pattern；When the first temperature sensor, second temperature sensor and three-temperature sensor go out
Then enter anti-freezing pattern during existing failure；When at least one temperature is small in the temperature without the temperature sensor for breaking down detection
Then enter anti-freezing pattern when the first temperature limit；When being all higher than the without the temperature that detects of temperature sensor for breaking down
Anti-freezing pattern is then exited during two temperature limits, wherein second temperature limit value is more than the first temperature limit.In the present embodiment first
Temperature limit and second temperature limit value are and are previously set.
Preferably, used as a kind of embodiment, the number of the temperature sensor is at least three.Exchanged heat in package
At least one temperature sensor is respectively provided with the package of the water inlet of device, the delivery port of case tube heat exchanger and case tube heat exchanger.
In the present embodiment, the temperature sensor being arranged in the package of case tube heat exchanger is preferably disposed on the interposition of case tube heat exchanger
Put.Temperature sensor can be antifreeze temperature-sensitive bag.So, what three temperature sensors were able to detect that case tube heat exchanger enters water temperature
Degree, leaving water temperature and temperature in package.
Preferably, as a kind of embodiment, the deicing controllor includes acquisition module, the first judge module, the
Two judge modules and the 3rd judge module；
The acquisition module is used to gather the detection of the first temperature sensor, second temperature sensor and three-temperature sensor
Temperature；
First judge module is used to judge the first temperature sensor, second temperature sensor and three-temperature sensor
Whether break down, if the first temperature sensor, second temperature sensor and three-temperature sensor break down, control
Air-conditioner refrigeration unit processed enters anti-freezing pattern, the temperature without the temperature sensor detection broken down that will otherwise be gathered
Send to the second judge module；
Second judge module is used for according to the temperature sensor institute without failure gathered according to acquisition module
The temperature of detection judges whether that at least one temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter
Enter anti-freezing pattern, otherwise send to the 3rd judge module temperature；
3rd judge module is used to be detected without the temperature sensor for breaking down according to what acquisition module was gathered
Temperature judge whether to be all higher than second temperature limit value, if it is control air-conditioner refrigeration unit exit anti-freezing pattern, otherwise
Keep present mode of operation.
The present invention provides a kind of air-conditioner refrigeration unit, and the refrigeration unit is provided with least three temperature on case tube heat exchanger
Degree sensor, wherein at least one temperature sensor is arranged on the water inlet of the case tube heat exchanger, at least one TEMP
Device is arranged on the delivery port of the case tube heat exchanger, and at least one temperature sensor is arranged on the shell of the case tube heat exchanger
In pipe.The present embodiment be provided with least three temperature sensors reduce certain temperature sensor be likely to occur drift or failure
And the risk for failing, while temperature sensor is provided separately, while detecting the water inlet of case tube heat exchanger, delivery port and shell
Temperature in pipe, can obtain the temperature of accurate case tube heat exchanger, and being the temperature according to case tube heat exchanger decides whether sky
Adjust device refrigeration unit to enter anti-freezing pattern and provide accurate foundation, it is to avoid the problem of case tube heat exchanger rupture occur.
Fig. 1 is the schematic flow sheet of one embodiment of the antifreeze control method of air-conditioner refrigeration unit of the invention.
As shown in figure 1, realizing controlling the antifreeze control of air-conditioner refrigeration unit, tool to step S400 by step S100
Body is described as follows：
S100：Gather the temperature that the first temperature sensor, second temperature sensor and three-temperature sensor are detected；
Temperature sensor in the present embodiment can be all temperature sensors being arranged on case tube heat exchanger, be in particular arranged at into
Temperature sensor in the mouth of a river, delivery port and package, temperature sensor is at least three, and the temperature for collecting at least includes water inlet
Temperature, leaving water temperature and temperature in package, wherein temperature sensor can be antifreeze temperature-sensitive bags.
S200：Judge whether the first temperature sensor, second temperature sensor and three-temperature sensor break down, such as
Really all of temperature sensor breaks down, then control air-conditioner refrigeration unit to enter anti-freezing pattern, otherwise to without appearance
The temperature of the temperature sensor detection of failure carries out next step judgement.In the present embodiment, judge whether temperature sensor event occurs
The temperature whether barrier mainly receives the temperature of temperature sensor detection or received according to acquisition module according to acquisition module
Whether degree is judged beyond normal range (NR), if temperature sensor does not detect temperature or the temperature that is detected substantially surpasses
Go out normal range (NR), that is to say, that the temperature or temperature that the temperature sensor is not collected in step S100 are substantially abnormal,
Then judge that the temperature sensor breaks down.Broken down if all of temperature sensor, be then directly entered anti-freezing pattern,
The temperature of the temperature sensor of failure is otherwise excluded, the temperature without the temperature sensor detection broken down is carried out
Next step judges.
S300：Judge whether at least one temperature is less than the in the temperature without the temperature sensor detection broken down
One temperature limit, if it is controls air-conditioner refrigeration unit to enter anti-freezing pattern, otherwise carries out next step judgement.The present embodiment
In be to judge successively either with or without the temperature of the temperature sensor detection broken down, as long as having a temperature less than the
One temperature limit, then into anti-freezing pattern, otherwise enter next step and judge.
S400：Judge whether the temperature without the temperature sensor detection broken down is all higher than second temperature limit value, such as
Fruit is that control air-conditioner refrigeration unit exits anti-freezing pattern, otherwise keeps present mode of operation.Only work as institute in the present embodiment
The temperature detected either with or without the temperature sensor for breaking down is all higher than second temperature limit value and just exits anti-freezing pattern.So set
Ensure that case tube heat exchanger is not in the situation of rupture to greatest extent.Wherein keeping present mode of operation may have two kinds of shapes
Formula, one kind is to maintain current anti-freezing pattern, and another kind is not enter anti-freezing pattern.When either with or without break down TEMP
When the temperature of device detection is all higher than the first temperature limit less than second temperature limit value, air-conditioner refrigeration unit does not enter antifreeze mould
Formula.As long as and air-conditioner refrigeration unit enters anti-freezing pattern, except the temperature of the temperature sensor detection that not all does not break down
Degree is all higher than second temperature limit value, otherwise keeps the anti-freezing pattern of current operation.
First determine whether whether temperature sensor normally runs in the present embodiment, the temperature sensor detection if normal operation
Temperature enter judge step；Broken down if all of temperature sensor, be directly entered anti-freezing pattern, so can
Even if ensureing that case tube heat exchanger is also not in the situation of bursting by freezing in the case where temperature sensor correctly can not indicate temperature.This
Anti-freezing pattern in embodiment can be the heater or other modes opened water pump or open case tube heat exchanger.
Preferably, used as a kind of embodiment, described S200 judges that first temperature sensor, second temperature are passed
Whether sensor and three-temperature sensor break down, if first temperature sensor, second temperature sensor and the 3rd
Temperature sensor breaks down, then control air-conditioner refrigeration unit to enter anti-freezing pattern, otherwise to without the temperature for breaking down
The temperature of degree sensor detection carries out next step judgement, comprises the following steps：
S201：Judge whether the first temperature sensor breaks down, if yes then enter S202（Determine whether other
Whether temperature sensor breaks down）, otherwise into step S300（The temperature for detecting enters for temperature judges step）；
S202：Judge whether second temperature sensor breaks down, if yes then enter step S203（Determine whether
Whether other temperature sensors break down）, otherwise into step S300（The temperature for detecting judges step into temperature）；
S203：Judge whether three-temperature sensor breaks down, if yes then enter anti-freezing pattern（I.e. in all of temperature
Degree sensor is directly entered anti-freezing pattern in the case of breaking down）, otherwise into step S300.
Whether the present embodiment is to judge whether temperature sensor breaks down, can mainly be examined according to the temperature sensor
Whether testing temperature and the temperature for being detected are normal, when the temperature that temperature sensor is detected is exception or temperature detector
No detection temperature when be directly entered anti-freezing pattern.
Preferably, as a kind of embodiment, judging described without the temperature for breaking down biography in the step S300
Whether at least one temperature is less than the first temperature limit to the temperature of sensor detection, if it is controls air-conditioner refrigeration unit to enter
Enter anti-freezing pattern, otherwise carry out next step judgement, comprise the following steps:
S301：Judge that whether inflow temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter
Anti-freezing pattern, otherwise into step S302；
S302：Judge that whether leaving water temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter
Anti-freezing pattern, otherwise into step S303；
S303：Judge that whether temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter in package
Enter anti-freezing pattern, otherwise into step S400.
The present embodiment is that the temperature detected to temperature sensor judges successively, simply by the presence of a temperature less than the
One temperature limit then controls air-conditioner refrigeration unit to judge without proceeding to other temperature into anti-freezing pattern；When
Into the judgement step S400 of next step when all of temperature is all higher than the first temperature limit.
The S400 judges whether the temperature without the temperature sensor detection broken down is all higher than second temperature limit value,
If it is control air-conditioner refrigeration unit exits anti-freezing pattern, otherwise keeps present mode of operation, comprises the following steps：
S401：Judge that whether inflow temperature, less than second temperature limit value, if it is keeps present mode of operation, otherwise enter
Enter step S402；
S402：Judge that whether leaving water temperature, less than second temperature limit value, if it is keeps present mode of operation, otherwise enter
Enter step S403；
S403：Judge that whether temperature, less than second temperature limit value, if it is keeps present mode of operation, otherwise in package
Exit anti-freezing pattern.
The present embodiment is determining whether when temperature to being detected is all higher than the first temperature limit.If detected
Temperature exist less than second temperature limit value temperature, then present mode of operation is kept, if i.e. air-conditioner refrigeration unit does not have
Into anti-freezing pattern, then do not enter anti-freezing pattern still, if air-conditioner refrigeration unit enters anti-freezing pattern, keep anti-freezing pattern
Operation.Only anti-freezing pattern is just exited when all of temperature is all higher than second temperature limit value.
Wherein, the first temperature limit and second temperature limit value are and preset.
The present invention is provided with multiple temperature sensors to detect the temperature of case tube heat exchanger, while increased judging that temperature is passed
Sensor whether failure the step of, the complete antifreezing effect of case tube heat exchanger can be reached.
Finally, it is necessary to explanation, in this patent document, such as first, second or the like relational terms are only used
Made a distinction with another entity or operation in by an entity or operation, and not necessarily require or imply these entities
Or there is any relation or order between operation.And, in this patent document, term " including ", "comprising" or its
What his variant, it is intended to and nonexcludability is included so that process, method, article including a series of key elements or
Person's equipment, not only including these key elements, but also including be not expressly set out and those skilled in the art understand that other
Key element, or also include the essential key element well known to these processes, method, article or equipment.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (6)
1. a kind of air-conditioner refrigeration unit, it is characterised in that：Including
The first temperature sensor of the water inlet of case tube heat exchanger is arranged on, for detecting inflow temperature；
The second temperature sensor of the delivery port of case tube heat exchanger is arranged on, for detecting leaving water temperature；
The three-temperature sensor in the package of case tube heat exchanger is arranged on, for temperature in the package for detecting case tube heat exchanger；
Also include deicing controllor, electrically connect first temperature sensor, second temperature sensor and three-temperature sensor,
For the temperature detected according to first temperature sensor, second temperature sensor and three-temperature sensor, institute is controlled
State whether air-conditioner refrigeration unit enters anti-freezing pattern；When first temperature sensor, second temperature sensor and the 3rd temperature
Degree sensor breaks down and then enters anti-freezing pattern；When without break down temperature sensor detection temperature at least
One temperature then enters anti-freezing pattern when being less than the first temperature limit；When the temperature detected without the temperature sensor for breaking down
Degree is all higher than then exiting anti-freezing pattern during second temperature limit value, wherein the second temperature limit value is limited more than first temperature
Value.
2. air-conditioner refrigeration unit according to claim 1, it is characterised in that：
The deicing controllor includes acquisition module, the first judge module, the second judge module and the 3rd judge module；
The acquisition module is used to gather the detection of first temperature sensor, second temperature sensor and three-temperature sensor
Temperature；
The temperature that first judge module is used to be gathered according to acquisition module judges the first temperature sensor, second temperature sensing
Whether device and three-temperature sensor break down, if the first temperature sensor, second temperature sensor and the 3rd temperature are passed
Sensor breaks down, then control air-conditioner refrigeration unit to enter anti-freezing pattern, will otherwise be gathered without breaking down
The temperature of temperature sensor detection is sent to the second judge module；
Second judge module is used for the temperature detected without the temperature sensor for breaking down gathered according to acquisition module
Degree judges the temperature of the collection, and whether at least one temperature is less than the first temperature limit, if it is controls air-conditioner to freeze
Unit enters anti-freezing pattern, otherwise sends to the 3rd judge module temperature；
3rd judge module is used for the temperature detected without the temperature sensor for breaking down gathered according to acquisition module
Degree judges whether the temperature of the collection is all higher than second temperature limit value, if it is controls air-conditioner refrigeration unit to exit antifreeze
Pattern, otherwise keeps present mode of operation.
3. the antifreeze control method of the air-conditioner refrigeration unit described in a kind of claim 1 or 2, it is characterised in that：Including as follows
Step：
S100：Gather the temperature that the first temperature sensor, second temperature sensor and three-temperature sensor are detected；
S200：Judge whether first temperature sensor, second temperature sensor and three-temperature sensor break down, such as
Really described first temperature sensor, second temperature sensor and three-temperature sensor break down, then control air-conditioner system
Cold group enters anti-freezing pattern, otherwise carries out next step judgement to the temperature without the temperature sensor detection broken down；
S300：Judge whether at least one temperature is less than first to the temperature without the temperature sensor for breaking down detection
Temperature limit, if it is controls air-conditioner refrigeration unit to enter anti-freezing pattern, otherwise carries out next step judgement；
S400：Judge whether the temperature without the temperature sensor for breaking down detection is all higher than second temperature limit value, such as
Fruit is that control air-conditioner refrigeration unit exits anti-freezing pattern, otherwise keeps present mode of operation.
4. antifreeze control method according to claim 3, it is characterised in that：
The S200 judges whether first temperature sensor, second temperature sensor and three-temperature sensor event occur
Barrier, if first temperature sensor, second temperature sensor and three-temperature sensor break down, controls air-conditioning
Device refrigeration unit enters anti-freezing pattern, and otherwise carrying out next step to the temperature without the temperature sensor detection broken down sentences
It is disconnected, comprise the following steps：
S201：Judge whether the first temperature sensor breaks down, if yes then enter S202, otherwise into step S300；
S202：Judge whether second temperature sensor breaks down, if yes then enter step S203, otherwise into step
S300；
S203：Judge whether three-temperature sensor breaks down, if yes then enter anti-freezing pattern, otherwise into step
S300。
5. antifreeze control method according to claim 3, it is characterised in that：
The step S300 judge it is described without break down temperature sensor detection temperature whether at least one temperature
Less than the first temperature limit, if it is control air-conditioner refrigeration unit to enter anti-freezing pattern, otherwise carry out next step judgement, wrap
Include following steps:
S301：Judge that whether inflow temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter antifreeze
Pattern, otherwise into step S302；
S302：Judge that whether leaving water temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter antifreeze
Pattern, otherwise into step S303；
S303：Judge that whether temperature, less than the first temperature limit, if it is controls air-conditioner refrigeration unit to enter anti-in package
Jelly pattern, otherwise into step S400.
6. antifreeze control method according to claim 3, it is characterised in that：
The S400 judges whether the temperature without the temperature sensor for breaking down detection is all higher than second temperature limit value,
If it is control air-conditioner refrigeration unit exits anti-freezing pattern, otherwise keeps present mode of operation, comprises the following steps：
S401：Judge that whether inflow temperature, less than second temperature limit value, if it is keeps present mode of operation, otherwise enter step
Rapid S402；
S402：Judge that whether leaving water temperature, less than second temperature limit value, if it is keeps present mode of operation, otherwise enter step
Rapid S403；
S403：Judge that whether temperature, less than second temperature limit value, if it is keeps present mode of operation in package, otherwise controls
Air-conditioner refrigeration unit exits anti-freezing pattern.
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| CN201310368310.4A CN104422076B (en) | 2013-08-21 | 2013-08-21 | Air-conditioner refrigeration unit and its antifreeze control method |
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| CN201310368310.4A CN104422076B (en) | 2013-08-21 | 2013-08-21 | Air-conditioner refrigeration unit and its antifreeze control method |
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| CN104764146A (en) * | 2015-03-23 | 2015-07-08 | 广东美的暖通设备有限公司 | Control method, device and system for achieving water-side heat exchanger freeze-proofing protection |
| CN104864572A (en) * | 2015-06-08 | 2015-08-26 | 珠海格力电器股份有限公司 | Air conditioner control method and device |
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| US10276572B2 (en) * | 2015-11-05 | 2019-04-30 | Taiwan Semiconductor Manufacturing Co., Ltd. | Semiconductor device and manufacturing method thereof |
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