CN103322641B - Use the method for controlling security of flammable coolant air-conditioner - Google Patents
Use the method for controlling security of flammable coolant air-conditioner Download PDFInfo
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- CN103322641B CN103322641B CN201210077807.6A CN201210077807A CN103322641B CN 103322641 B CN103322641 B CN 103322641B CN 201210077807 A CN201210077807 A CN 201210077807A CN 103322641 B CN103322641 B CN 103322641B
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Abstract
A kind of method of controlling security using flammable coolant air-conditioner, it comprises the steps: the concentration of combustibility coolant in the indoor sensor sensing chamber of a, air-conditioner; B, entering step c when air-conditioner detects the concentration of indoor flammable coolant more than or equal to alert if concentration, otherwise, air-conditioner continues to set mode operation by user; C, alarm condition start, and the indoor fan of air-conditioner, outdoor fan are opened, by indoor combustibility refrigerant recovering to outside; D, when time of fire alarming divide kind more than n or low pressure lower than pMPa time, compressor, the second closed electromagnetic valve; E, when air-conditioner detects that the concentration of indoor flammable coolant is lower than alert if concentration, alarm condition releases, and the indoor fan of air-conditioner, outdoor fan are closed, and return to step a. When running into the situation of leakage coolant inside the air conditioner chamber of the present invention, can indoor combustibility refrigerant recovering to outside, reduce the coolant leakage amount in room as far as possible, reduce the risk of burning in room and the risk of compressor blast, guarantee the personal safety of user to greatest extent, it is to avoid unnecessary property loss.
Description
Technical field
The present invention relates to a kind of air-conditioner using flammable coolant, specifically a kind of method of controlling security using flammable coolant air-conditioner.
Background technology
HC base cold-producing medium such as R290, R32 etc. of adopting in recent years belong to fuel gas, therefore, having certain danger when injecting these coolant, this is accomplished by the measure taking necessity to ensure the use safety of air-conditioner, it is to avoid during air-conditioner generation secondary refrigerant leakage, human body is damaged. China Patent Publication No. CN101737878 discloses a kind of air-conditioner using combustible refrigerant and control method thereof on June 16th, 2010, including the cooling/heating pump air conditioner system that compressor, cross valve, indoor heat converter, throttle mechanism, outdoor heat exchanger form, it is respectively arranged with air conditioner connecting pipe liquid valve and air conditioner connecting pipe air valve at the two ends of indoor heat converter, is provided with refrigerant medium concentration sensor in indoor; The connecting line of outdoor heat exchanger is provided with excretory duct branch road and auto Drain thereof. After flammable refrigerant medium leakage being detected, outdoor machine part is coolant discharging to outdoor large space, thus reducing the leakage rate of indoor, it is to avoid the flammable working medium concentration in room reaches combustion limits. But, it is also short of to some extent for the control situation of secondary refrigerant leakage, therefore, it is necessary to develop a kind of air-conditioner method of controlling security using combustible refrigerant, makes indoor leakage coolant minimize, guarantees the personal safety of user to greatest extent.
Summary of the invention
The purpose of the present invention aim to provide a kind of design advantages of simple, safe and reliable, there is warning and indoor discharge leakage coolant, make the method for controlling security using flammable coolant air-conditioner that indoor secondary refrigerant leakage amount minimizes, to overcome weak point of the prior art.
By a kind of method of controlling security using flammable coolant air-conditioner that this purpose designs, described air-conditioner includes compressor, cross valve, outdoor heat exchanger, the first electromagnetic valve, indoor heat exchanger and the second electromagnetic valve and is sequentially connected with the refrigerating circulation system of composition, it is characterized in that the control method of this air-conditioner comprises the steps:
A, air-conditioner indoor sensor sensing chamber in the concentration of flammable coolant;
B, entering step c when air-conditioner detects the concentration of indoor flammable coolant more than or equal to alert if concentration, otherwise, air-conditioner continues to set mode operation by user;
C, alarm condition start, and the indoor fan of air-conditioner, outdoor fan are opened, by indoor combustibility refrigerant recovering to outside;
D, when time of fire alarming more than n minute or low pressure lower than pMPa time, compressor, the second closed electromagnetic valve;
E, when air-conditioner detects that the concentration of indoor flammable coolant is lower than alert if concentration, alarm condition releases, and the indoor fan of air-conditioner, outdoor fan are closed, and return to step a.
Described alarm condition starts, and when air-conditioner is in shutdown mode, indoor fan opens high wind, first closed electromagnetic valve in outdoor heat exchanger exit, and outdoor fan height wind is opened, and cross valve switches to refrigeration mode.
Described alarm condition starts, and when air-conditioner is in air supply pattern, indoor fan opens high wind, first closed electromagnetic valve in outdoor heat exchanger exit, and outdoor fan height wind is opened, and cross valve switches to refrigeration mode.
Described alarm condition starts, and when air-conditioner is in heating mode, indoor fan opens high wind, first closed electromagnetic valve in outdoor heat exchanger exit, and outdoor fan height wind is opened, and cross valve switches to refrigeration mode.
Described alarm condition starts, and when air-conditioner is in refrigeration mode, indoor fan opens high wind, first closed electromagnetic valve in outdoor heat exchanger exit, and outdoor fan height wind is opened.
The span of described time of fire alarming n is 1-5 minute.
The span of described low pressure p is 0.11-0.2Mpa.
When running into the situation of leakage coolant inside the air conditioner chamber of the present invention, can indoor combustibility refrigerant recovering to outside, reduce the coolant leakage amount in room as far as possible, reduce the risk of burning in room and the risk of compressor blast, guarantee the personal safety of user to greatest extent, it is to avoid unnecessary property loss. Have simple to operate, the feature that reliability is high, applied widely.
Accompanying drawing explanation
The systematic schematic diagram of the air-conditioner that Fig. 1 is the present invention.
Fig. 2 is the control method flow chart of the present invention.
In figure: 1 is outdoor heat exchanger, 2 is the first electromagnetic valve, and 3 is high-pressure stop valve, and 4 is indoor heat exchanger, and 5 is the second electromagnetic valve, and 6 is low-pressure shutoff valve, and 7 is reservoir, and 8 is compressor, and 9 is cross valve.
Detailed description of the invention
Below in conjunction with drawings and Examples, the invention will be further described.
Referring to Fig. 1-Fig. 2, a kind of method of controlling security using flammable coolant air-conditioner, described air-conditioner includes compressor 8, cross valve 9, outdoor heat exchanger the 1, first electromagnetic valve 2, indoor heat exchanger 4 and the second electromagnetic valve 5 and is sequentially connected with the refrigerating circulation system of composition, wherein, it is provided with high-pressure stop valve 3 between first electromagnetic valve 2 and indoor heat exchanger 4, being provided with low-pressure shutoff valve 6 between indoor heat exchanger 4 and the second electromagnetic valve 5, compressor 8 is also connected with reservoir 7. The control method of this air-conditioner comprises the steps:
A, air-conditioner indoor sensor sensing chamber in the concentration of flammable coolant;
B, entering step c when air-conditioner detects the concentration of indoor flammable coolant more than or equal to alert if concentration, otherwise, air-conditioner continues to set mode operation by user;
C, alarm condition start, and the indoor fan of air-conditioner, outdoor fan are opened, by indoor combustibility refrigerant recovering to outside;
D, when time of fire alarming more than n minute or low pressure lower than pMPa time, compressor, the second electromagnetic valve (5) close;
E, when air-conditioner detects that the concentration of indoor flammable coolant is lower than alert if concentration, alarm condition releases, and the indoor fan of air-conditioner, outdoor fan are closed, and return to step a.
Described alarm condition starts, and air-conditioner is when being in shutdown mode or air supply pattern or heating mode, indoor fan opens high wind, the coolant fast spread revealed is made to prevent local from reaching explosion ratio, first electromagnetic valve 2 in outdoor heat exchanger 1 exit cuts out, outdoor fan height wind is opened, and cross valve 9 switches to refrigeration mode.
And now, when air-conditioner is in refrigeration mode, indoor fan opens high wind, the coolant fast spread revealed is made to prevent local from reaching explosion ratio, first electromagnetic valve 2 in outdoor heat exchanger 1 exit cuts out, and outdoor fan height wind is opened, and cross valve 9 is without switching over again.
Wherein, the span of time of fire alarming n is 1-5 minute, and the present embodiment is preferably 3 minutes, can according to interior space size, more preferably 1 minute, 2 minutes, 4 minutes, 5 minutes. The span of low pressure p is 0.11-0.2Mpa, the present embodiment is preferably 0.15MPa, can according to interior space size, more preferably 0.11MPa, 0.12MPa, 0.13MPa, 0.14MPa, 0.16MPa, 0.17MPa, 0.18MPa, 0.19MPa, 0.2MPa. The time of fire alarming of the present embodiment more than 3 minutes or low pressure lower than 0.15MPa time, compressor, the second electromagnetic valve 5 are closed, now because the coolant of indoor has been recycled to outside substantially, and low pressure remains above atmospheric pressure, ensure to enter air inside air conditioning system, so can close compressor, and closing the second electromagnetic valve 5 is to prevent coolant to be again back to indoor.
The present invention is by whether interior sensor detection coolant is revealed, when occurring to reveal, by the control method of the present invention by the flammable refrigerant recovering of indoor to outside, damage thus preventing indoor room from revealing the personal safety to user in a large number because of coolant, it has reliability height, practical feature.
Claims (5)
1. the method for controlling security using flammable coolant air-conditioner, described air-conditioner includes compressor (8), cross valve (9), outdoor heat exchanger (1), the first electromagnetic valve (2), indoor heat exchanger (4) and the second electromagnetic valve (5) and is sequentially connected with the refrigerating circulation system of composition, it is characterized in that the control method of this air-conditioner comprises the steps:
A, air-conditioner indoor sensor sensing chamber in the concentration of flammable coolant;
B, entering step c when air-conditioner detects the concentration of indoor flammable coolant more than or equal to alert if concentration, otherwise, air-conditioner continues to set mode operation by user;
C, alarm condition start, and the indoor fan of air-conditioner, outdoor fan are opened, by indoor combustibility refrigerant recovering to outside;
D, when time of fire alarming more than n minute or low pressure lower than pMPa time, compressor, the second electromagnetic valve (5) close;
E, when air-conditioner detects that the concentration of indoor flammable coolant is lower than alert if concentration, alarm condition releases, and the indoor fan of air-conditioner, outdoor fan are closed, and return to step a;
The span of described time of fire alarming n is 1-5 minute; The span of described low pressure p is 0.11-0.2Mpa.
2. use the method for controlling security of flammable coolant air-conditioner according to claim 1, it is characterized in that described alarm condition starts, and air-conditioner is when being in shutdown mode, indoor fan opens high wind, first electromagnetic valve (2) in outdoor heat exchanger (1) exit cuts out, outdoor fan height wind is opened, and cross valve (9) switches to refrigeration mode.
3. use the method for controlling security of flammable coolant air-conditioner according to claim 1, it is characterized in that described alarm condition starts, and air-conditioner is when being in air supply pattern, indoor fan opens high wind, first electromagnetic valve (2) in outdoor heat exchanger (1) exit cuts out, outdoor fan height wind is opened, and cross valve (9) switches to refrigeration mode.
4. use the method for controlling security of flammable coolant air-conditioner according to claim 1, it is characterized in that described alarm condition starts, and air-conditioner is when being in heating mode, indoor fan opens high wind, first electromagnetic valve (2) in outdoor heat exchanger (1) exit cuts out, outdoor fan height wind is opened, and cross valve (9) switches to refrigeration mode.
5. use the method for controlling security of flammable coolant air-conditioner according to claim 1, it is characterized in that described alarm condition starts, and air-conditioner is when being in refrigeration mode, indoor fan opens high wind, first electromagnetic valve (2) in outdoor heat exchanger (1) exit cuts out, and outdoor fan height wind is opened.
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