CN104422076A - Air conditioner refrigerating unit and anti-freezing control method thereof - Google Patents
Air conditioner refrigerating unit and anti-freezing control method thereof Download PDFInfo
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- CN104422076A CN104422076A CN201310368310.4A CN201310368310A CN104422076A CN 104422076 A CN104422076 A CN 104422076A CN 201310368310 A CN201310368310 A CN 201310368310A CN 104422076 A CN104422076 A CN 104422076A
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- conditioner refrigeration
- freezing pattern
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- 238000007710 freezing Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000005057 refrigeration Methods 0.000 claims description 68
- 230000002528 anti-freeze Effects 0.000 claims description 29
- 230000009172 bursting Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides an air conditioner refrigerating unit and an anti-freezing control method thereof. The anti-freezing control method comprises the steps of collecting the temperature of a temperature sensor, and entering an anti-freezing mode when the temperature sensors are all in fault; entering an anti-freezing mode when at least one of the acquired temperatures is lower than a first temperature limit value; and exiting the anti-freezing mode when the collected temperatures are all larger than the second temperature limit value. The air conditioner refrigerating unit is provided with the temperature sensors in the water inlet, the water outlet and the shell and tube heat exchanger, so that the anti-freezing failure caused by the drift or fault of one temperature sensor is avoided, the shell and tube heat exchanger can be effectively prevented from being frozen, and the reliability of the shell and tube heat exchanger of the air conditioner refrigerating unit is improved.
Description
Technical field
The present invention relates to field of air conditioning, particularly relate to a kind of air-conditioner refrigeration unit and antifreeze control method thereof.
Background technology
Heat exchanger many employings case tube heat exchanger of current air-conditioner refrigeration unit, if water is wherein discharged as not timely during winter operation at the environ-ment that temperature is lower by this heat exchanger, then may by bursting by freezing.In addition, if refrigerant heat exchange is excessive, make the temperature of chilled water too low, also likely cause case tube heat exchanger to break.
The case tube heat exchanger of general air-conditioner refrigeration unit only adopts an antifreeze temperature-sensitive bag to carry out antifreeze detection at present, and this antifreeze temperature-sensitive bag is generally arranged in the package of case tube heat exchanger.Open water pump when antifreeze control method is shutdown when antifreeze temperature is less than certain limit value antifreeze, exit when antifreeze temperature is greater than certain limit value antifreeze, switch off the pump.But, if this antifreeze temperature-sensitive contracts out existing drift or fault and causes the antifreeze temperature that detects inaccurate, the antifreeze problem such as to break controlling to lose efficacy and then occurred case tube heat exchanger can be caused, affect the use of air-conditioner set.
Therefore, a kind of antifreeze control method that accurately can control air-conditioner refrigeration unit is provided to be those skilled in the art's problem demanding prompt solutions.
Summary of the invention
In order to the technical problem that the antifreeze control solving air-conditioner refrigeration unit may be lost efficacy, the invention provides a kind of new air-conditioner refrigeration unit and antifreeze control method thereof, this air-conditioner refrigeration unit arranges three temperature sensors to detect the temperature of case tube heat exchanger, can ensure to enter anti-freezing pattern accurately, avoid occurring that TEMP actuator temperature is inaccurate and make the antifreeze problem controlling to lose efficacy.
Technical scheme of the present invention is as follows:
A kind of air-conditioner refrigeration unit, comprises the first temperature sensor of the water inlet being arranged on case tube heat exchanger, for detecting inflow temperature;
Be arranged on the second temperature sensor of the delivery port of case tube heat exchanger, for detecting coolant-temperature gage;
Be arranged on the three-temperature sensor in the package of case tube heat exchanger, for detect case tube heat exchanger package in temperature;
Also comprise deicing controllor, be electrically connected described first temperature sensor, the second temperature sensor and three-temperature sensor, for the temperature detected according to described first temperature sensor, the second temperature sensor and three-temperature sensor, control described air-conditioner refrigeration unit and whether enter anti-freezing pattern; When described first temperature sensor, the second temperature sensor and three-temperature sensor all break down, enter anti-freezing pattern; Then anti-freezing pattern is entered when having at least a temperature to be less than the first temperature limit in the temperature that the temperature sensor do not broken down detects; Then exit anti-freezing pattern when the temperature that the temperature sensor do not broken down detects all is greater than the second temperature limit, wherein said second temperature limit is greater than described first temperature limit.
Wherein in an embodiment, described deicing controllor comprises acquisition module, the first judge module, the second judge module and the 3rd judge module;
The temperature that described acquisition module detects for gathering described first temperature sensor, the second temperature sensor and three-temperature sensor;
Described first judge module is used for judging whether the first temperature sensor, the second temperature sensor and three-temperature sensor break down according to the temperature of acquisition module collection, if the first temperature sensor, the second temperature sensor and three-temperature sensor all break down, then control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise the temperature that the gathered temperature sensor do not broken down detects is sent to the second judge module;
The temperature that described second judge module is used for detecting according to the temperature sensor do not broken down of acquisition module collection judges whether the temperature of described collection has at least a temperature to be less than the first temperature limit, if it is control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise temperature is sent to the 3rd judge module;
The temperature that described 3rd judge module is used for detecting according to the temperature sensor do not broken down of acquisition module collection judges whether the temperature of described collection is all greater than the second temperature limit, if it is control air-conditioner refrigeration unit and exit anti-freezing pattern, otherwise keep present mode of operation.
An antifreeze control method for air-conditioner refrigeration unit, comprises the steps:
S100: gather the temperature that the first temperature sensor, the second temperature sensor and three-temperature sensor detect;
S200: judge whether described first temperature sensor, the second temperature sensor and three-temperature sensor break down, if described first temperature sensor, the second temperature sensor and three-temperature sensor all break down, then control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise next step judgement is carried out to the temperature that the temperature sensor do not broken down detects;
S300: whether the temperature that the temperature sensor do not broken down described in judgement detects has at least a temperature to be less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise carry out next step judgement;
S400: whether the temperature that the temperature sensor do not broken down described in judgement detects all is greater than the second temperature limit, if it is controls air-conditioner refrigeration unit and exits anti-freezing pattern, otherwise keep present mode of operation.
Wherein in an embodiment, described S200 judges whether described first temperature sensor, the second temperature sensor and three-temperature sensor break down, if described first temperature sensor, the second temperature sensor and three-temperature sensor all break down, then control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise carry out next step to the temperature that the temperature sensor do not broken down detects to judge, comprise the steps:
S201: judge whether the first temperature sensor breaks down, if yes then enter S202, otherwise enter step S300;
S202: judge whether the second temperature sensor breaks down, if yes then enter step S203, otherwise enter step S300;
S203: judge whether three-temperature sensor breaks down, if yes then enter anti-freezing pattern, otherwise enters step S300.
Wherein in an embodiment, whether the temperature that the temperature sensor do not broken down described in described step S300 judges detects has at least a temperature to be less than the first temperature limit, if it is control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise carry out next step judgement, comprise the steps:
S301: judge whether inflow temperature is less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise enter step S302;
S302: judge whether coolant-temperature gage is less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise enter step S303;
S303: judge in package, whether temperature is less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise enter step S400.
Wherein in an embodiment, whether the temperature that the temperature sensor do not broken down described in described S400 judges detects all is greater than the second temperature limit, if it is control air-conditioner refrigeration unit and exit anti-freezing pattern, otherwise keep present mode of operation, comprise the steps:
S401: judge whether inflow temperature is less than the second temperature limit, if it is keeps present mode of operation, otherwise enter step S402;
S402: judge whether coolant-temperature gage is less than the second temperature limit, if it is keeps present mode of operation, otherwise enter step S403;
S403: judge that in package, whether temperature is less than the second temperature limit, if it is keeps present mode of operation, otherwise control air-conditioner refrigeration unit exits anti-freezing pattern.
The invention has the beneficial effects as follows:
Air-conditioner refrigeration unit of the present invention is all provided with temperature sensor in the water inlet of case tube heat exchanger, delivery port and package, avoid the antifreeze inefficacy caused because of certain temperature sensor appearance drift or fault, can carry out case tube heat exchanger effectively antifreeze, improve the reliability of the case tube heat exchanger of air-conditioner refrigeration unit.
Accompanying drawing explanation
Below in conjunction with concrete drawings and the specific embodiments, the present invention is further elaborated.
Fig. 1 is the schematic flow sheet of an embodiment of the antifreeze control method of air-conditioner refrigeration unit 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.
A kind of air-conditioner refrigeration unit, comprises the first temperature sensor of the water inlet being arranged on case tube heat exchanger, for detecting inflow temperature;
Be arranged on the second temperature sensor of the delivery port of case tube heat exchanger, for detecting coolant-temperature gage;
Be arranged on the three-temperature sensor in the package of case tube heat exchanger, for detect case tube heat exchanger package in temperature;
Also comprise deicing controllor, be electrically connected the first temperature sensor, the second temperature sensor and three-temperature sensor, for the temperature detected according to the first temperature sensor, the second temperature sensor and three-temperature sensor, control air-conditioner refrigeration unit and whether enter anti-freezing pattern; Anti-freezing pattern is then entered when the first temperature sensor, the second temperature sensor and three-temperature sensor all break down; Then anti-freezing pattern is entered when having at least a temperature to be less than the first temperature limit in the temperature that the temperature sensor do not broken down detects; Then exit anti-freezing pattern when the temperature that the temperature sensor do not broken down detects all is greater than the second temperature limit, wherein the second temperature limit is greater than the first temperature limit.The first temperature limit in the present embodiment and the second temperature limit are prior setting.
Preferably, as a kind of embodiment, the number of described temperature sensor is at least three.Namely in the package of the water inlet of case tube heat exchanger, the delivery port of case tube heat exchanger and case tube heat exchanger, be respectively provided to a few temperature sensor.In the present embodiment, the temperature sensor be arranged in the package of case tube heat exchanger is preferably disposed on the centre position of case tube heat exchanger.Temperature sensor can be antifreeze temperature-sensitive bag.Like this, three temperature sensors can detect temperature in the inflow temperature of case tube heat exchanger, leaving water temperature and package.
Preferably, as a kind of embodiment, described deicing controllor comprises acquisition module, the first judge module, the second judge module and the 3rd judge module;
The temperature that described acquisition module detects for gathering the first temperature sensor, the second temperature sensor and three-temperature sensor;
Described first judge module is for judging whether the first temperature sensor, the second temperature sensor and three-temperature sensor break down, if the first temperature sensor, the second temperature sensor and three-temperature sensor all break down, then control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise the temperature that the gathered temperature sensor do not broken down detects is sent to the second judge module;
Described second judge module is used for judging whether to have at least a temperature to be less than the first temperature limit according to the temperature detected according to the temperature sensor do not broken down of acquisition module collection, if it is control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise temperature is sent to the 3rd judge module;
The temperature that described 3rd judge module is used for detecting according to the temperature sensor do not broken down of acquisition module collection judges whether all to be greater than the second temperature limit, if it is control air-conditioner refrigeration unit and exit anti-freezing pattern, otherwise keep present mode of operation.
The invention provides a kind of air-conditioner refrigeration unit, this refrigeration unit is provided with at least three temperature sensors on case tube heat exchanger, wherein at least one temperature sensor is arranged on the water inlet of described case tube heat exchanger, at least one temperature sensor is arranged on the delivery port of described case tube heat exchanger, and at least one temperature sensor is arranged in the package of described case tube heat exchanger.The present embodiment is provided with at least three temperature sensors to reduce certain temperature sensor and may occur drifting about or fault and the risk that lost efficacy, temperature sensor is provided separately simultaneously, detect the temperature in the water inlet of case tube heat exchanger, delivery port and package simultaneously, the temperature of case tube heat exchanger accurately can be obtained, for determining whether that according to the temperature of case tube heat exchanger air-conditioner refrigeration unit enters anti-freezing pattern and provides foundation accurately, avoid the problem occurring that case tube heat exchanger breaks.
Fig. 1 is the schematic flow sheet of an embodiment of the antifreeze control method of air-conditioner refrigeration unit of the present invention.
As shown in Figure 1, realize by step S100 to step S400 the antifreeze control controlling air-conditioner refrigeration unit, be described as follows:
S100: gather that the first temperature sensor, the second temperature sensor and three-temperature sensor detect temperature; Temperature sensor in the present embodiment can be all temperature sensors be arranged on case tube heat exchanger, especially the temperature sensor in water inlet, delivery port and package is arranged on, temperature sensor is minimum is three, the temperature collected at least comprises temperature in inflow temperature, leaving water temperature and package, and wherein temperature sensor can be antifreeze temperature-sensitive bag.
S200: judge whether the first temperature sensor, the second temperature sensor and three-temperature sensor break down, if all temperature sensors all break down, then control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise next step judgement is carried out to the temperature that the temperature sensor do not broken down detects.In the present embodiment, judge whether temperature sensor breaks down mainly whether receive according to acquisition module temperature that temperature sensor detects or whether exceed normal range (NR) according to the temperature that acquisition module receives and judge, if temperature sensor does not detect that temperature or the temperature detected obviously exceed normal range (NR), that is the temperature or the temperature that do not collect this temperature sensor in step S100 are obviously abnormal, then judge that this temperature sensor breaks down.If all temperature sensors all break down, then directly enter anti-freezing pattern, otherwise get rid of the temperature of temperature sensor broken down, to the temperature sensor do not broken down detect temperature carry out next step and judge.
S300: judge whether have at least a temperature to be less than the first temperature limit in the temperature that the temperature sensor do not broken down detects, if it is to control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise carry out next step judgement.Be that the temperature that all temperature sensors do not broken down detect is judged successively in the present embodiment, as long as there is a temperature to be less than the first temperature limit, then enter anti-freezing pattern, otherwise enter next step judgement.
S400: judge whether the temperature that the temperature sensor do not broken down detects all is greater than the second temperature limit, if it is control air-conditioner refrigeration unit and exit anti-freezing pattern, otherwise keep present mode of operation.Only have the temperature detected when all temperature sensors do not broken down all to be greater than the second temperature limit in the present embodiment and just exit anti-freezing pattern.Such setting ensure that case tube heat exchanger there will not be the situation of breaking to greatest extent.Wherein keep present mode of operation may have two kinds of forms, one keeps current anti-freezing pattern, and another kind does not enter anti-freezing pattern.When the temperature that all temperature sensors of not breaking down detect all be greater than the first temperature limit be less than the second temperature limit time, air-conditioner refrigeration unit does not enter anti-freezing pattern.As long as and air-conditioner refrigeration unit enters anti-freezing pattern, the temperature that the temperature sensor do not broken down except not all detects all is greater than the second temperature limit, otherwise keeps the anti-freezing pattern of current operation.
First judge in the present embodiment whether temperature sensor normally runs, if normally run, the temperature that temperature sensor detects enters determining step; If all temperature sensors all break down, directly enter anti-freezing pattern, though can ensure like this case tube heat exchanger when temperature sensor can not correctly indicated temperature also there will not be the situation of bursting by freezing.Anti-freezing pattern in the present embodiment can be heater or other modes of opening water pump or opening case tube heat exchanger.
Preferably, as a kind of embodiment, described S200 judges whether described first temperature sensor, the second temperature sensor and three-temperature sensor break down, if described first temperature sensor, the second temperature sensor and three-temperature sensor all break down, then control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise carry out next step to the temperature that the temperature sensor do not broken down detects to judge, comprise the steps:
S201: judge whether the first temperature sensor breaks down, namely judges whether other temperature sensors break down further if yes then enter S202(), otherwise enter the temperature that namely step S300(detect and enter as temperature determining step);
S202: judge whether the second temperature sensor breaks down, namely judges whether other temperature sensors break down further if yes then enter step S203(), otherwise enter the temperature that namely step S300(detect and enter temperature determining step);
S203: judge whether three-temperature sensor breaks down, if yes then enter anti-freezing pattern (namely directly entering anti-freezing pattern when all temperature sensors all break down), otherwise enters step S300.
The present embodiment judges whether temperature sensor breaks down; mainly according to this temperature sensor whether can detected temperatures and the temperature that detects whether normal, when the temperature that temperature sensor detects is exception or temperature detector does not all have directly to enter anti-freezing pattern during detected temperatures.
Preferably, as a kind of embodiment, whether the temperature that the temperature sensor do not broken down described in judging in described step S300 detects has at least a temperature to be less than the first temperature limit, if it is control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise carry out next step to judge, comprise the steps:
S301: judge whether inflow temperature is less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise enter step S302;
S302: judge whether coolant-temperature gage is less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise enter step S303;
S303: judge in package, whether temperature is less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise enter step S400.
The present embodiment judges successively the temperature that temperature sensor detects, and is less than the first temperature limit and then controls air-conditioner refrigeration unit as long as there is temperature and enter anti-freezing pattern and do not need to proceed to judge to other temperature; Next step determining step S400 is entered when all temperature are all greater than the first temperature limit.
Described S400 judges whether the temperature that the temperature sensor do not broken down detects all is greater than the second temperature limit, if it is controls air-conditioner refrigeration unit and exits anti-freezing pattern, otherwise keep present mode of operation, comprise the steps:
S401: judge whether inflow temperature is less than the second temperature limit, if it is keeps present mode of operation, otherwise enter step S402;
S402: judge whether coolant-temperature gage is less than the second temperature limit, if it is keeps present mode of operation, otherwise enter step S403;
S403: judge that in package, whether temperature is less than the second temperature limit, if it is keeps present mode of operation, otherwise exits anti-freezing pattern.
The present embodiment is further judgement when being all greater than the first temperature limit to detected temperature.If there is the temperature being less than the second temperature limit in detected temperature, then keep present mode of operation, if namely air-conditioner refrigeration unit does not enter anti-freezing pattern, then still do not enter anti-freezing pattern, if air-conditioner refrigeration unit enters anti-freezing pattern, then anti-freezing pattern is kept to run.Only have and just exit anti-freezing pattern when all temperature are all greater than the second temperature limit.
Wherein, the first temperature limit and the second temperature limit are and preset.
The present invention is provided with multiple temperature sensor to detect the temperature of case tube heat exchanger, adds the step judging temperature sensor whether fault simultaneously, can reach the complete antifreezing effect of case tube heat exchanger.
Finally, it should be noted that, in this patent document, such as the relational terms of first, second grade and so on is only for separating an entity or operation with another entity or operating space, and not necessarily requires or imply to there is any relation or sequentially between these entities or operation.And, in this patent document, term " comprises ", " comprising " or its any other variant, it is intended to contain and nonexcludability comprises, thus make to comprise the process of a series of key element, method, article or equipment, not only comprise these key elements, but also comprise and clearly not listing and other key elements that those skilled in the art can know, or also comprise for the known requisite key element of these processes, method, article or equipment.
The above embodiment only have expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (6)
1. an air-conditioner refrigeration unit, is characterized in that: comprise
Be arranged on the first temperature sensor of the water inlet of case tube heat exchanger, for detecting inflow temperature;
Be arranged on the second temperature sensor of the delivery port of case tube heat exchanger, for detecting coolant-temperature gage;
Be arranged on the three-temperature sensor in the package of case tube heat exchanger, for detect case tube heat exchanger package in temperature;
Also comprise deicing controllor, be electrically connected described first temperature sensor, the second temperature sensor and three-temperature sensor, for the temperature detected according to described first temperature sensor, the second temperature sensor and three-temperature sensor, control described air-conditioner refrigeration unit and whether enter anti-freezing pattern; When described first temperature sensor, the second temperature sensor and three-temperature sensor all break down, enter anti-freezing pattern; Then anti-freezing pattern is entered when having at least a temperature to be less than the first temperature limit in the temperature that the temperature sensor do not broken down detects; Then exit anti-freezing pattern when the temperature that the temperature sensor do not broken down detects all is greater than the second temperature limit, wherein said second temperature limit is greater than described first temperature limit.
2. air-conditioner refrigeration unit according to claim 1, is characterized in that:
Described deicing controllor comprises acquisition module, the first judge module, the second judge module and the 3rd judge module;
The temperature that described acquisition module detects for gathering described first temperature sensor, the second temperature sensor and three-temperature sensor;
Described first judge module is used for judging whether the first temperature sensor, the second temperature sensor and three-temperature sensor break down according to the temperature of acquisition module collection, if the first temperature sensor, the second temperature sensor and three-temperature sensor all break down, then control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise the temperature that the gathered temperature sensor do not broken down detects is sent to the second judge module;
The temperature that described second judge module is used for detecting according to the temperature sensor do not broken down of acquisition module collection judges whether the temperature of described collection has at least a temperature to be less than the first temperature limit, if it is control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise temperature is sent to the 3rd judge module;
The temperature that described 3rd judge module is used for detecting according to the temperature sensor do not broken down of acquisition module collection judges whether the temperature of described collection is all greater than the second temperature limit, if it is control air-conditioner refrigeration unit and exit anti-freezing pattern, otherwise keep present mode of operation.
3. an antifreeze control method for the air-conditioner refrigeration unit described in claim 1 or 2, is characterized in that: comprise the steps:
S100: gather the temperature that the first temperature sensor, the second temperature sensor and three-temperature sensor detect;
S200: judge whether described first temperature sensor, the second temperature sensor and three-temperature sensor break down, if described first temperature sensor, the second temperature sensor and three-temperature sensor all break down, then control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise next step judgement is carried out to the temperature that the temperature sensor do not broken down detects;
S300: whether the temperature that the temperature sensor do not broken down described in judgement detects has at least a temperature to be less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise carry out next step judgement;
S400: whether the temperature that the temperature sensor do not broken down described in judgement detects all is greater than the second temperature limit, if it is controls air-conditioner refrigeration unit and exits anti-freezing pattern, otherwise keep present mode of operation.
4. antifreeze control method according to claim 3, is characterized in that:
Described S200 judges whether described first temperature sensor, the second temperature sensor and three-temperature sensor break down, if described first temperature sensor, the second temperature sensor and three-temperature sensor all break down, then control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise carry out next step to the temperature that the temperature sensor do not broken down detects to judge, comprise the steps:
S201: judge whether the first temperature sensor breaks down, if yes then enter S202, otherwise enter step S300;
S202: judge whether the second temperature sensor breaks down, if yes then enter step S203, otherwise enter step S300;
S203: judge whether three-temperature sensor breaks down, if yes then enter anti-freezing pattern, otherwise enters step S300.
5. antifreeze control method according to claim 3, is characterized in that:
Whether the temperature that the temperature sensor do not broken down described in described step S300 judges detects has at least a temperature to be less than the first temperature limit, if it is control air-conditioner refrigeration unit and enter anti-freezing pattern, otherwise carry out next step to judge, comprise the steps:
S301: judge whether inflow temperature is less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise enter step S302;
S302: judge whether coolant-temperature gage is less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise enter step S303;
S303: judge in package, whether temperature is less than the first temperature limit, if it is controls air-conditioner refrigeration unit and enters anti-freezing pattern, otherwise enter step S400.
6. antifreeze control method according to claim 3, is characterized in that:
Whether the temperature that the temperature sensor do not broken down described in described S400 judges detects all is greater than the second temperature limit, if it is controls air-conditioner refrigeration unit and exits anti-freezing pattern, otherwise keep present mode of operation, comprise the steps:
S401: judge whether inflow temperature is less than the second temperature limit, if it is keeps present mode of operation, otherwise enter step S402;
S402: judge whether coolant-temperature gage is less than the second temperature limit, if it is keeps present mode of operation, otherwise enter step S403;
S403: judge that in package, whether temperature is less than the second temperature limit, if it is keeps present mode of operation, otherwise control air-conditioner refrigeration unit exits anti-freezing pattern.
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| CN201310368310.4A CN104422076B (en) | 2013-08-21 | 2013-08-21 | Air conditioner refrigerating unit and anti-freezing control method thereof |
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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 |
| CN105180539A (en) * | 2015-09-08 | 2015-12-23 | 广东芬尼克兹节能设备有限公司 | Anti-freezing control method and system for heat pump unit |
| CN105299991A (en) * | 2015-11-12 | 2016-02-03 | 广东美的暖通设备有限公司 | Variable refrigerant flow air conditioning system and fault detection method of anti-freezing valve thereof |
| CN106288245A (en) * | 2015-11-05 | 2017-01-04 | 广东志高暖通设备股份有限公司 | A kind of water machine antifreeze control method, system and air-conditioning equipment |
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| CN106839512A (en) * | 2017-03-08 | 2017-06-13 | 美的集团股份有限公司 | Determination methods and device and heat pump that heat pump temperature sensor comes off |
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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 |
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