CN101464033A - Antifreeze method and system for indoor unit of air conditioner - Google Patents
Antifreeze method and system for indoor unit of air conditioner Download PDFInfo
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- CN101464033A CN101464033A CNA2007103019033A CN200710301903A CN101464033A CN 101464033 A CN101464033 A CN 101464033A CN A2007103019033 A CNA2007103019033 A CN A2007103019033A CN 200710301903 A CN200710301903 A CN 200710301903A CN 101464033 A CN101464033 A CN 101464033A
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Abstract
The invention relates to an anti-freezing method of an indoor unit of an air conditioner. The method comprises the following steps: the temperature at an inlet of an evaporator of the indoor unit is detected, if the detected temperature is lower than a first set temperature and the duration exceeds a first set time, the air conditioner is commanded to enter anti-freezing protection mode till the detected temperature is higher than asecond set temperature and the duration achieves a second set time, and then the air conditioner is commanded to exit the anti-freezing mode. The method further comprises: if the detected temperature is lower than the third temperature and the duration exceeds the third set time, the air conditioner is commanded to enter the anti-freezing protection mode. If an air-conditioning system comprises an outdoor unit and the indoor unit for the invention, the anti-freezing protection mode is to close the outdoor unit; if the air-conditioning system comprises one outdoor unit and at least two indoor units, wherein, part of the indoor units needs the anti-freezing protection, and then the anti-freezing protection mode is a close electronic expansion valve for closing part of the indoor units. The invention can effectively solve the problems of icing and water leakage of the indoor unit of the air conditioner under the refrigeration mode.
Description
Technical field
The present invention relates to field of air conditioning, particularly relate to a kind of means to prevent freezing and winterization system of indoor apparatus of air conditioner.
Background technology
Air-conditioner is one of our the most frequently used household electrical appliances, and it utilizes the compressor compresses refrigerant, realizes refrigeration, heat-production functions by refrigerant heat absorption, heat release.Consult Fig. 1, air-conditioner is under refrigeration mode, and compressor 11 sucks the gas coolant of low-temp low-pressure, and after compression, refrigerant becomes the saturated gas of HTHP, sends into condenser 12; Through supercooling, it is constant to keep-up pressure in condenser 12 for the saturated gas of HTHP, outwards emits heat, thereby is condensed into the liquid of cryogenic high pressure; Refrigerant is discharged from condenser 12, when the electric expansion valve 13, makes pressure decline because of being obstructed, and causes part refrigerant liquid to become gas, absorbs gasification latent heat simultaneously, and itself temperature is also reduced, and becomes the damp steam of low-temp low-pressure; Enter indoor machine evaporation 14, in indoor machine evaporation 14, refrigerant liquid absorbs airborne heat under the constant situation of pressure, surrounding air is turned cold, and by blower fan cold air is blown in the room simultaneously, reaches the effect of refrigeration.
Indoor set is in process of refrigerastion, and evaporator refrigerant temperature is low excessively in the group coil pipe of indoor machine evaporation 14, causes refrigerant liquid to freeze in evaporator fin and drip tray easily, the indoor set problem such as leak that occurs freezing.At present in the prior art; on the coil pipe of indoor machine evaporation 14, establish a temperature sensor; the temperature that detects when sensor temperature is lower than design temperature; automatically stop compressor 11 operations or close electric expansion valve 13; enter the anti-freeze protected mode; refrigerant temperature raises in the group coil pipe of indoor machine evaporation 14, avoids refrigerant liquid to freeze in evaporator fin and drip tray.The temperature that detects when sensor temperature is higher than above-mentioned design temperature, restarts compressor 11 or unlocking electronic expansion valve 13, recovers normal refrigeration mode.
In the prior art, when the coil temperature that detects indoor machine evaporation 14 is lower than design temperature, enter anti-freezing protection mode,, will make air-conditioning frequently enter anti-freezing protection mode, influence refrigeration if design temperature is too high; If the temperature of setting is too low, indoor set will occur and occur the drainage of freezing, but air-conditioning does not also enter anti-freezing protection mode, causes bad influence to the user.Therefore, the means to prevent freezing Rule of judgment of existing indoor apparatus of air conditioner is more single, is difficult to control air-conditioning on appropriate opportunity and enters anti-freezing protection mode, can not effectively solve indoor set icing and water leakage under refrigeration mode.
Summary of the invention
Technical problem to be solved by this invention provides a kind of means to prevent freezing of indoor apparatus of air conditioner, and this means to prevent freezing can effectively solve indoor apparatus of air conditioner icing and water leakage under refrigeration mode.
Another object of the present invention provides a kind of winterization system of indoor apparatus of air conditioner, and this winterization system can effectively solve indoor apparatus of air conditioner icing and water leakage under refrigeration mode.
The means to prevent freezing of a kind of indoor apparatus of air conditioner of the present invention; this method comprises: the inlet temperature that detects indoor machine evaporation; be lower than first design temperature as detected temperatures; and the duration surpasses first setting-up time; the instruction air-conditioning enters anti-freezing protection mode; be higher than second design temperature until detected temperatures, and continue second setting-up time, the instruction air-conditioning withdraws from antifreeze pattern.
Preferably, this method also comprises: detected temperatures is lower than the 3rd design temperature as described, and the duration surpass the 3rd setting-up time, the instruction air-conditioning enters anti-freezing protection mode.
Preferably, this method also comprises: be made of an off-premises station and an indoor set as air-conditioning system, anti-freezing protection mode is for closing off-premises station.
Preferably, this method also comprises: be made of an off-premises station and at least two indoor sets as air-conditioning system, wherein the part indoor set needs anti-frost protection, and anti-freezing protection mode is the electric expansion valve of closing above-mentioned part indoor set.
Preferably, the scope of first design temperature is to bear 10 to spend to 0 degree; The scope of first setting-up time is 3 minutes to 15 minutes.
Preferably, the scope of second design temperature be 1 spend to 15 the degree; The scope of second setting-up time is 5 minutes to 25 minutes.
Preferably, the scope of the 3rd design temperature be 0 spend to 5 the degree; The scope of second setting-up time is 20 minutes to 90 minutes.
The present invention also provides a kind of winterization system of indoor apparatus of air conditioner, comprise that temperature sensor, first enters antifreeze mode unit and withdraws from antifreeze mode unit: described temperature sensor is arranged on the porch of indoor machine evaporation, detected temperature value is sent to described first enter the anti-frost protection unit and withdraw from the anti-frost protection unit; Described first enters the anti-frost protection unit, be used for being lower than first design temperature at the temperature value that receives, and duration when surpassing first setting-up time, the instruction air-conditioning enters anti-freezing protection mode; Describedly withdraw from antifreeze mode unit, be used under anti-freezing protection mode, the temperature value that receives is higher than second design temperature, and continues second setting-up time, and the instruction air-conditioning withdraws from antifreeze pattern.
Preferably, comprise also that the second anti-frost protection unit is received in the temperature value that described temperature sensor transmits, and is lower than the 3rd design temperature as this temperature value, and duration the 3rd setting-up time, the instruction air-conditioning enters anti-freezing protection mode.
Preferably, be made of an off-premises station and an indoor set as air-conditioning system, anti-freezing protection mode is for closing off-premises station; Be made of an off-premises station and at least two indoor sets as air-conditioning system, wherein the part indoor set needs anti-frost protection, and anti-freezing protection mode is the electric expansion valve of closing above-mentioned part indoor set.
Compared with prior art, the present invention has the following advantages:
The present invention detects the inlet temperature of indoor evaporator, is lower than first design temperature as detected temperature, and the duration surpass first setting-up time, the instruction air-conditioning enters antifreeze pattern.Indoor machine evaporation only is lower than certain numerical value at internal temperature, and just may cause refrigerant liquid to freeze in evaporator fin and drip tray after the certain time.The present invention is according to the operate power and the running environment of air-conditioning; rationally regulate first design temperature and first setting-up time; with respect to prior art; one fixed temperature is set merely; because of design temperature too high or too low; the refrigeration and the user that influence air-conditioning use, and the present invention can control air-conditioner and enter anti-freezing protection mode in more suitable, effectively solve the indoor apparatus of air conditioner icing and water leakage.
The present invention is higher than second design temperature in detected temperature, and continues second setting-up time, and the instruction air-conditioning withdraws from antifreeze pattern, avoids influencing refrigeration because of air-conditioning is in antifreeze pattern for a long time.
Description of drawings
Fig. 1 has the air-conditioner structural representation now;
Fig. 2 is an air-conditioning system schematic diagram of the present invention;
The means to prevent freezing flow chart of the indoor apparatus of air conditioner that Fig. 3 provides for first embodiment of the invention;
The means to prevent freezing flow chart of the indoor apparatus of air conditioner that Fig. 4 provides for second embodiment of the invention;
Fig. 5 is an air-conditioning system schematic diagram of the present invention;
The winterization system schematic diagram of the indoor apparatus of air conditioner that Fig. 6 provides for first embodiment of the invention;
The winterization system schematic diagram of the indoor apparatus of air conditioner that Fig. 7 provides for second embodiment of the invention.
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Consult Fig. 2, be air-conditioning system schematic diagram of the present invention, comprise compressor 11, off-premises station 12, electric expansion valve 13, indoor machine evaporation 14, reach temperature sensor 15.Temperature sensor 15 is arranged on the porch of indoor machine evaporation 14, detects the intake air temperature of indoor machine evaporation 14.
Under refrigeration mode, refrigerant is low temperature liquid, absorbs the heat refrigeration in indoor machine evaporation 14, and temperature sensor 15 is generally lower in the detected temperature in indoor machine evaporation 14 porch.Temperature sensor 15 is sent to processor with detected temperature; be lower than first design temperature as detected temperature; and the duration surpasses first setting-up time; the processor instruction air-conditioning enters anti-freezing protection mode; be higher than second design temperature until detected temperature; and continue second setting-up time, processor instructs air-conditioning to withdraw from anti-freezing protection mode again.
The scope of first design temperature is to bear 10 to spend to 0 degree, is preferably negative 3 degree, and the scope of first setting-up time is 3 minutes to 15 minutes, is preferably 8 minutes.The scope of second design temperature be positive 1 spend to 15 the degree, be preferably 5 the degree, the scope of second setting-up time is 5 minutes to 25 minutes, is preferably 15 minutes.
Be example now, technique scheme of the present invention is described with a Haier air-conditioning.Consult Fig. 3, concrete steps are as follows.
Step 301 presets first design temperature, first setting-up time, second design temperature, reaches second setting-up time in the processor of air-conditioning.First design temperature is negative 10 degree, and first setting-up time is 3 minutes, and second design temperature is positive 1 degree, and second setting-up time is 25 minutes.
Step 302 is provided with temperature sensor 15 at the evaporator inlet of indoor set 14, detects the inlet temperature of indoor machine evaporation 14, and this temperature value is sent to processor.
Step 303, processor will receive temperature and first design temperature compares, and is higher than negative 3 degree as this detected temperatures, and processor does not process; Be lower than negative 3 degree as this detected temperatures, processor picks up counting, and is lower than negative 3 ° of duration not above 8 minutes as this detected temperatures, and processor is removed timing; Be lower than negative 3 ° of duration above 8 minutes as this detected temperatures, processor generates control instruction, makes air-conditioning enter anti-freezing protection mode.
Step 304, under anti-freezing protection mode, processor compares the detected temperatures and second design temperature that receives, and is lower than 1 degree as this detected temperatures, and processor does not process; Be higher than 1 degree as this detected temperatures, processor picks up counting, and is higher than 1 as this detected temperatures and spends the duration not above 25 minutes, and processor is removed timing; Be higher than 1 as this detected temperatures and spend the duration above 25 minutes, processor generates control instruction, makes air-conditioning withdraw from anti-freezing protection mode.
Because of indoor machine evaporation 14 only is lower than certain numerical value at internal temperature, and just may cause refrigerant liquid in evaporator fin and drip tray, to freeze after the certain time.The present invention rationally regulates first design temperature and first setting-up time according to the operate power and the running environment of air-conditioning, makes air-conditioner can enter anti-freezing protection mode in more suitable, effectively solves the indoor apparatus of air conditioner icing and water leakage.The present invention is higher than second design temperature in detected temperature, and continues second setting-up time, and the instruction air-conditioning withdraws from antifreeze pattern, avoids influencing refrigeration because of air-conditioning is in antifreeze pattern for a long time.
The present invention also can be according to practical situations, is provided with more to make air-conditioning enter the condition of anti-freezing protection mode, more effectively prevents that indoor apparatus of air conditioner from freezing and leaks.The present invention can add the 3rd design temperature and the 3rd setting-up time, and the scope of the 3rd design temperature is zero degree to 5 degree, is preferably 1 degree, and the scope of the 3rd setting-up time is 20 minutes to 90 minutes, is preferably 50 minutes.Satisfy in the inlet temperature of indoor machine evaporation 14 and to be lower than for the 3rd design temperature duration and to surpass the 3rd setting-up time, or be lower than for the first design temperature duration and surpass first setting-up time, air-conditioning all enters anti-freezing protection mode.Consult Fig. 4, concrete steps are as follows.
Step 401 presets first design temperature, first setting-up time, second design temperature, second setting-up time, the 3rd design temperature, the 3rd setting-up time in the processor of air-conditioning.First design temperature is negative 3 degree, and first setting-up time is 8 minutes, and second design temperature is positive 5 degree, and second setting-up time is 15 minutes, and the 3rd design temperature is 1 °, and the 3rd setting-up time is 50 minutes.
Step 402 is provided with temperature sensor 15 at the inlet of indoor machine evaporation 14, detects the inlet temperature of indoor machine evaporation 14, and this temperature value is sent to processor.
Step 403, processor will receive temperature and first design temperature compares, and is higher than negative 3 degree as this detected temperatures, and processor judges further whether this temperature is higher than 1 degree, and in this way, processor does not deal with; As not, processor picks up counting, and is lower than 1 as detected temperatures and spends the duration and do not surpass 50 minutes, and processor is removed timing; Be lower than negative 1 as this detected temperatures and spend the duration above 50 minutes, processor generates control instruction, makes air-conditioning enter anti-freezing protection mode;
Be lower than negative 3 degree as this detected temperatures, processor picks up counting, and is lower than negative 3 ° of duration not above 8 minutes as this detected temperatures, and processor is removed timing; Be lower than negative 3 ° of duration above 8 minutes as this detected temperatures, processor generates control instruction, makes air-conditioning enter anti-freezing protection mode.
Step 404, under anti-freezing protection mode, processor compares the detected temperatures and second design temperature that receives, and is lower than 5 degree as this detected temperatures, and processor does not process; Be higher than 5 degree as this detected temperatures, processor picks up counting, and is higher than 5 as this detected temperatures and spends the duration not above 15 minutes, and processor is removed timing; Be higher than 1 as this detected temperatures and spend the duration above 15 minutes, processor generates control instruction, makes air-conditioning withdraw from anti-freezing protection mode.
In like manner; the present invention can be provided with the condition that more enters anti-freezing protection mode according to actual needs; as long as air-conditioning system satisfies wherein arbitrary condition in refrigerating operaton; the instruction air-conditioning system enters anti-freezing protection mode automatically; can guarantee further that air-conditioning system can advance into anti-freezing protection mode in icing drainage, guarantee the normal operation of air-conditioning system.
The antifreeze pattern of the present invention can be had any different because of the formation of air-conditioning system is different, if air-conditioning system is that an off-premises station is joined an indoor set pattern, then antifreeze pattern is for closing off-premises station, and indoor set continues to move.If air-conditioning system is that an off-premises station is joined a plurality of indoor set patterns, wherein the part indoor set needs anti-frost protection, and anti-freezing protection mode is the electric expansion valve of closing above-mentioned part indoor set.
Consult Fig. 5, be indoor apparatus of air conditioner winterization system structural representation of the present invention, comprise compressor 11, off-premises station 12, electric expansion valve 13A, indoor machine evaporation 14A, temperature sensor 15A, electric expansion valve 13B, indoor machine evaporation 14B, reach temperature sensor 15B.Temperature sensor 15A is arranged on the porch of indoor machine evaporation 14A, detects the intake air temperature of indoor machine evaporation 14A, and temperature sensor 15B is arranged on the porch of indoor machine evaporation 14B, detects the intake air temperature of indoor machine evaporation 14B.
As the temperature that detects according to temperature sensor 15A; processor need enter anti-freezing protection mode through judging, the processor sending controling instruction instructs this electric expansion valve 13A to close to electric expansion valve 13A; and electric expansion valve 13B opens as usual, and indoor machine evaporation 14B normally moves.
The present invention is that an off-premises station is joined a plurality of indoor set patterns in air-conditioning system; when entering anti-freezing protection mode; only close the indoor set electric expansion valve that need enter anti-freezing protection mode, do not influence other indoor set work, guarantee whole air-conditioning system refrigeration as far as possible.
Based on the means to prevent freezing of above-mentioned indoor apparatus of air conditioner, the present invention also provides a kind of winterization system of indoor apparatus of air conditioner, and this winterization system can effectively solve the indoor apparatus of air conditioner icing and water leakage.Consult Fig. 6, comprise temperature sensor 15, the first anti-frost protection unit 16 and withdraw from anti-frost protection unit 17.Temperature sensor 15 is arranged on the porch of indoor machine evaporation, detected temperature value is sent to first enter anti-frost protection unit 16 and withdraw from antifreeze mode unit 17.
First enters anti-frost protection unit 16 is lower than first design temperature at the temperature value that receives, and the duration surpass first setting-up time, the instruction air-conditioning enters anti-freezing protection mode.Be made of an off-premises station and an indoor set as air-conditioning system, anti-freezing protection mode is for closing off-premises station; Be made of an off-premises station and at least two indoor sets as air-conditioning system, wherein the part indoor set needs anti-frost protection, and anti-freezing protection mode is the electric expansion valve of closing above-mentioned part indoor set.
Withdraw from anti-frost protection unit 17 and be higher than second design temperature at the temperature value that receives, and continue second setting-up time, the instruction air-conditioning withdraws from antifreeze pattern.
Consult Fig. 7, comprise that temperature sensor 15, first enters anti-frost protection unit 16, withdraws from anti-frost protection unit 17, the second anti-frost protection unit 18.The second anti-frost protection unit 18 is received in the temperature value that temperature sensor 15 transmits, and is lower than the 3rd design temperature as this temperature value, and the duration surpass the 3rd setting-up time, the instruction air-conditioning enters anti-freezing protection mode.
More than to the means to prevent freezing and the winterization system of a kind of indoor apparatus of air conditioner provided by the present invention, be described in detail, used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (10)
1, a kind of means to prevent freezing of indoor apparatus of air conditioner is characterized in that, this method comprises:
Detect the inlet temperature of indoor machine evaporation, be lower than first design temperature, and the duration surpasses first setting-up time as detected temperatures; the instruction air-conditioning enters anti-freezing protection mode; be higher than second design temperature until detected temperatures, and continue second setting-up time, the instruction air-conditioning withdraws from antifreeze pattern.
2, means to prevent freezing as claimed in claim 1 is characterized in that, this method also comprises:
Detected temperatures is lower than the 3rd design temperature as described, and the duration surpass the 3rd setting-up time, the instruction air-conditioning enters anti-freezing protection mode.
3, means to prevent freezing as claimed in claim 1 is characterized in that, this method also comprises:
Be made of an off-premises station and an indoor set as air-conditioning system, anti-freezing protection mode is for closing off-premises station.
4, means to prevent freezing as claimed in claim 1 is characterized in that, this method also comprises:
Be made of an off-premises station and at least two indoor sets as air-conditioning system, wherein the part indoor set needs anti-frost protection, and anti-freezing protection mode is the electric expansion valve of closing above-mentioned part indoor set.
As each described means to prevent freezing of claim 1 to 4, it is characterized in that 5, the scope of first design temperature is to bear 10 to spend to 0 degree; The scope of first setting-up time is 3 minutes to 15 minutes.
6, as each described means to prevent freezing of claim 1 to 4, it is characterized in that, the scope of second design temperature be 1 spend to 15 the degree; The scope of second setting-up time is 5 minutes to 25 minutes.
7, as each described means to prevent freezing of claim 1 to 4, it is characterized in that, the scope of the 3rd design temperature be 0 spend to 5 the degree; The scope of second setting-up time is 20 minutes to 90 minutes.
8, a kind of winterization system of indoor apparatus of air conditioner is characterized in that, comprises that temperature sensor, first enters antifreeze mode unit and withdraws from antifreeze mode unit:
Described temperature sensor is arranged on the porch of indoor machine evaporation, detected temperature value is sent to described first enter the anti-frost protection unit and withdraw from the anti-frost protection unit;
Described first enters the anti-frost protection unit, be used for being lower than first design temperature at the temperature value that receives, and duration when surpassing first setting-up time, the instruction air-conditioning enters anti-freezing protection mode;
Describedly withdraw from antifreeze mode unit, be used under anti-freezing protection mode, the temperature value that receives is higher than second design temperature, and continues second setting-up time, and the instruction air-conditioning withdraws from antifreeze pattern.
9, system as claimed in claim 8 is characterized in that, also comprises; the second anti-frost protection unit is received in the temperature value that described temperature sensor transmits, and is lower than the 3rd design temperature as this temperature value; and duration the 3rd setting-up time, the instruction air-conditioning enters anti-freezing protection mode.
10, system as claimed in claim 8 or 9 is characterized in that be made of an off-premises station and an indoor set as air-conditioning system, anti-freezing protection mode is for closing off-premises station; Be made of an off-premises station and at least two indoor sets as air-conditioning system, wherein the part indoor set needs anti-frost protection, and anti-freezing protection mode is the electric expansion valve of closing above-mentioned part indoor set.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007103019033A CN101464033A (en) | 2007-12-19 | 2007-12-19 | Antifreeze method and system for indoor unit of air conditioner |
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| CNA2007103019033A CN101464033A (en) | 2007-12-19 | 2007-12-19 | Antifreeze method and system for indoor unit of air conditioner |
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