CN111720950A - Control method for reducing indoor side refrigerant leakage of air conditioner and air conditioner - Google Patents
Control method for reducing indoor side refrigerant leakage of air conditioner and air conditioner Download PDFInfo
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- CN111720950A CN111720950A CN202010424534.2A CN202010424534A CN111720950A CN 111720950 A CN111720950 A CN 111720950A CN 202010424534 A CN202010424534 A CN 202010424534A CN 111720950 A CN111720950 A CN 111720950A
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 121
- 238000000034 method Methods 0.000 title claims abstract description 46
- 238000001816 cooling Methods 0.000 claims description 13
- 238000010257 thawing Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 231100001229 severe poisoning Toxicity 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000015654 memory Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 231100000572 poisoning Toxicity 0.000 description 1
- 230000000607 poisoning effect Effects 0.000 description 1
- 239000002341 toxic gas Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
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- Air Conditioning Control Device (AREA)
Abstract
The invention belongs to the field of air conditioners, and particularly provides a control method for reducing indoor side refrigerant leakage of an air conditioner and the air conditioner. The invention aims to solve the problem that the amount of leaked refrigerant is still high under the condition of indoor refrigerant leakage. To this end, the air conditioner of the invention includes indoor heat exchanger, outdoor heat exchanger and compressor, there is the first pressure sensor on the indoor heat exchanger, the control method includes: determining whether the refrigerant leaks; when the refrigerant leakage is determined, detecting an internal pressure value P1 of the indoor heat exchanger through a first pressure sensor; controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger, and controlling the refrigerant of the indoor heat exchanger to continue flowing to the outdoor heat exchanger; when the pressure P1 is less than or equal to the set pressure value, controlling the compressor to stop; wherein the set pressure value is less than the standard atmospheric pressure. When the refrigerant leaks, the pressure value inside the indoor heat exchanger is smaller than the standard atmospheric pressure, the refrigerant is difficult to enter the room from the leakage position, and the severe poisoning event of a user is avoided.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides a control method for reducing indoor side refrigerant leakage of an air conditioner and the air conditioner.
Background
When the indoor side of the air conditioner causes refrigerant leakage under external factors or special conditions, because the refrigerant is flammable and explosive, a large amount of refrigerant leaks indoors, and dangerous fire, poisoning, even explosion and other conditions are easily caused, a control method for reducing the indoor side refrigerant leakage amount of the air conditioner is necessary in order to ensure the safety of the air conditioner.
In the prior art, the compressor is usually immediately turned off when refrigerant leakage of the indoor heat exchanger is detected, and the leakage of the indoor side refrigerant can be reduced as much as possible under the condition of ensuring that the compressor is not damaged, however, the scheme has great disadvantages, for example, if the air conditioner is in a cooling or dehumidifying mode, the indoor heat exchanger still retains about 12% of refrigerant quantity, and if the air conditioner is in a heating mode, the indoor heat exchanger is in a high-pressure state, and a large amount of refrigerant remains in the indoor heat exchanger, so that the ratio of nearly 43% is achieved, no matter 12% or 43%, which is not the final effect desired by the skilled person, because the final effect is still likely to cause serious accidents.
Accordingly, there is a need in the art for a new control method for reducing indoor refrigerant leakage of an air conditioner and an air conditioner to further solve the problem that the amount of refrigerant leaked under the indoor refrigerant leakage condition is still high.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the amount of refrigerant leaked under the condition of indoor-side refrigerant leakage is still high, the present invention provides a control method for reducing the indoor-side refrigerant leakage amount of an air conditioner, wherein the air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger and a compressor, the indoor heat exchanger is provided with a first pressure sensor, and the control method comprises:
determining whether the refrigerant leaks;
when the refrigerant leakage is determined, detecting an internal pressure value P1 of the indoor heat exchanger through the first pressure sensor;
controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger, and controlling the refrigerant of the indoor heat exchanger to continue flowing to the outdoor heat exchanger;
when the pressure P1 is less than or equal to a set pressure value, controlling the compressor to stop;
wherein the set pressure value is less than the standard atmospheric pressure.
In a preferred embodiment of the above control method for reducing the indoor refrigerant leakage of the air conditioner, a first on-off valve and a second on-off valve are respectively disposed on two refrigerant pipelines connecting the outdoor heat exchanger and the indoor heat exchanger,
the step of controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger and controlling the refrigerant of the indoor heat exchanger to continue flowing to the outdoor heat exchanger specifically comprises the following steps:
determining an operating mode of the air conditioner;
when the air conditioner is in a cooling mode or a defrosting mode, closing the first opening and closing valve and keeping the second opening and closing valve in an opening state;
in the cooling mode or the defrosting mode, the first on-off valve is an on-off valve on a refrigerant pipeline through which the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger, and the second on-off valve is an on-off valve on a refrigerant pipeline through which the refrigerant flows from the indoor heat exchanger to the outdoor heat exchanger.
In a preferred embodiment of the above control method for reducing the leakage of the refrigerant on the indoor side of the air conditioner, the step of "controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger and controlling the refrigerant of the indoor heat exchanger to continue flowing to the outdoor heat exchanger" further includes:
when the air conditioner is in a heating mode, the second opening and closing valve is closed, and the opening state of the first opening and closing valve is maintained.
In a preferred technical solution of the control method for reducing the indoor-side refrigerant leakage of the air conditioner, the outdoor heat exchanger is provided with a second pressure sensor, and the step of determining the working mode of the air conditioner specifically includes:
controlling the second pressure sensor to detect an internal pressure value P2 of the outdoor heat exchanger;
comparing the sizes of P1 and P2;
when P1 < P2, determining that the working mode of the air conditioner is a cooling mode or a defrosting mode.
In a preferred embodiment of the control method for reducing the indoor-side refrigerant leakage amount of the air conditioner, the step of determining the operation mode of the air conditioner further includes:
when P1 is more than or equal to P2, the working mode of the air conditioner is determined as a heating mode.
In a preferred embodiment of the above control method for reducing indoor refrigerant leakage of an air conditioner, "determining an operating mode of the air conditioner" includes:
controlling the air conditioner to check an operation program executed by the air conditioner;
and judging the working mode of the air conditioner according to the running program.
In a preferred technical solution of the control method for reducing indoor side refrigerant leakage of an air conditioner, the air conditioner further includes a four-way reversing valve, and the step of "determining the working mode of the air conditioner" specifically includes:
determining the specific working on-off state of the four-way reversing valve;
and judging the working mode of the air conditioner according to the specific working on-off state of the four-way reversing valve.
In a preferred embodiment of the control method for reducing the indoor refrigerant leakage of the air conditioner, after the step of "controlling the compressor to stop when P1 is less than or equal to a set pressure value", the control method further includes:
the first open-close valve and the second open-close valve are brought into a closed state.
In the preferable technical scheme of the control method for reducing the indoor side refrigerant leakage of the air conditioner, the set pressure value is 0.07 Mpa; and/or the first pressure sensor is an electric contact pressure gauge.
The invention also provides an air conditioner, which is the air conditioner in any one of the technical schemes.
As can be understood by those skilled in the art, in the technical solution of the present invention, an air conditioner includes an indoor heat exchanger, an outdoor heat exchanger and a compressor, the indoor heat exchanger is provided with a first pressure sensor, and a control method includes:
determining whether the refrigerant leaks;
when the refrigerant leakage is determined, detecting an internal pressure value P1 of the indoor heat exchanger through a first pressure sensor;
controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger, and controlling the refrigerant of the indoor heat exchanger to continue flowing to the outdoor heat exchanger;
when the pressure P1 is less than or equal to the set pressure value, controlling the compressor to stop;
wherein the set pressure value is less than the standard atmospheric pressure.
Through the arrangement mode, when the refrigerant leaks, the control method can control the refrigerant in the air conditioner to be continuously transported to the outdoor heat exchanger, the refrigerant inflow of the indoor heat exchanger part is stopped, in addition, a threshold value smaller than the standard atmospheric pressure is set, under the condition, when the pressure value of the indoor heat exchanger reaches P1, the pressure value is smaller than or equal to the set pressure value, at the moment, P1 is necessarily smaller than the standard atmospheric pressure, even if the indoor heat exchanger leaks, the pressure value in the indoor heat exchanger is smaller than the standard atmospheric pressure, the refrigerant is difficult to directly enter the room from the leakage position, and therefore the severe event that the user is poisoned or even dies due to the refrigerant leakage is avoided.
As can be understood by those skilled in the art, since the refrigerant is not a highly toxic gas, when the problem of refrigerant leakage is usually faced, the countermeasure angle of those skilled in the art is to reduce the outflow of the refrigerant as much as possible on the premise of avoiding the air entering the air conditioning system, so as to reduce the loss, and repair can be completed quickly when the later-stage maintenance personnel perform maintenance and repair. However, in summer or winter, the indoor environment is closed, and especially, the old or the child is also used to turn on the air conditioner when sleeping well at night, if the leakage is not found at night, the damage degree to the user will increase sharply, even the damage is caused to death, and under such a condition, the safety control degree of the refrigerant leakage in the prior art is far from sufficient. In order to completely avoid the situation, the inventor designs and develops a new control method, under the situation, although the compressor is easier to damage, and the maintenance difficulty caused by the air mixed in the circulating system is greatly increased, the safety degree of the control method is greatly improved, the indoor refrigerant leakage amount can be reduced as much as possible, the personal safety is ensured, compared with the safety of household appliances, the control method has a remarkable practical value, and the control method is completely different from the invention conception of the prior art, wherein the maintenance cost is slightly more, even the appliances are scrapped, and the higher safety is pursued because the self protection of the air conditioner is abandoned.
Drawings
The air conditioner, which is a control method for reducing the indoor side refrigerant leakage amount of the air conditioner, according to the present invention will be described with reference to the accompanying drawings. In the drawings:
FIG. 1 is a flow chart illustrating a control method for reducing indoor refrigerant leakage of an air conditioner according to the present invention;
FIG. 2 is a detailed embodiment of step S300 in FIG. 1;
FIG. 3 is a first embodiment of step S310 in FIG. 2;
FIG. 4 is a second embodiment of step S310 in FIG. 2;
fig. 5 is a third embodiment of step S310 in fig. 2.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example, although the first pressure sensor is described as an electric contact pressure gauge in the description, it is obvious that the present invention may adopt other forms of sensors or devices instead of the electric contact pressure gauge as long as the internal pressure value of the indoor heat exchanger can be detected.
It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Referring to fig. 1, a main flow of a control method for reducing an indoor refrigerant leakage amount of an air conditioner according to the present invention will be described.
As shown in fig. 1, in order to solve the problem that the amount of refrigerant leaked under the condition of refrigerant leakage at the indoor side is still high, the air conditioner of the present invention includes an indoor heat exchanger, an outdoor heat exchanger and a compressor, the indoor heat exchanger is provided with a first pressure sensor, and the control method includes:
s100, determining whether a refrigerant leaks;
s200, detecting an internal pressure value P1 of the indoor heat exchanger through a first pressure sensor when the refrigerant leakage is determined;
s300, controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger, and controlling the refrigerant of the indoor heat exchanger to continue flowing to the outdoor heat exchanger;
s400, when the pressure P1 is less than or equal to a set pressure value, controlling the compressor to stop;
wherein the set pressure value is less than the standard atmospheric pressure.
The setting mode has the advantages that: after the leakage of the refrigerant is found, the control method can transfer the refrigerant to the outdoor heat exchanger as much as possible, and the pressure value of the indoor heat exchanger is smaller than the standard pressure value, so that the refrigerant storage amount of the indoor heat exchanger is reduced, the interior of the indoor heat exchanger generates negative pressure, the whole circulating system is in a gas absorption state rather than a gas leakage state at the leakage position, and the leakage amount of the refrigerant at the indoor side is reduced as little as possible.
The control method for reducing the indoor refrigerant leakage of the air conditioner according to the present invention will be described in detail with further reference to fig. 1 to 5.
As shown in fig. 1 and fig. 2, in a possible embodiment, a first opening/closing valve and a second opening/closing valve are respectively disposed on two refrigerant pipelines connecting the outdoor heat exchanger and the indoor heat exchanger, and the step 300 of controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger and controlling the refrigerant of the indoor heat exchanger to continue flowing to the outdoor heat exchanger specifically includes:
s310, determining the working mode of the air conditioner;
s320, when the air conditioner is in a refrigerating mode or a defrosting mode, closing the first opening and closing valve and keeping the second opening and closing valve in an opening state;
s330, when the air conditioner is in a heating mode, closing the second on-off valve and keeping the opening state of the first on-off valve;
in the cooling mode or the defrosting mode, an on-off valve on a refrigerant pipeline through which the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger is a first on-off valve, and an on-off valve on a refrigerant pipeline through which the refrigerant flows from the indoor heat exchanger to the outdoor heat exchanger is a second on-off valve.
The core principle is that the refrigerant operation direction of the air conditioner can be opposite under different working modes, if the scheme under the different working modes is not designed in detail, a large amount of refrigerant can be gathered towards the indoor side, so that the situation completely opposite to the original design purpose of the invention is caused, and therefore, the combination of the opening and closing control of the first opening and closing valve and the second opening and closing valve and the working modes is necessary. According to the different purposes of the air conditioner, the air conditioner can be roughly divided into three types, namely cooling, heating and defrosting, and other working modes, such as dehumidification, belong to one type of cooling in fact, and are not described again. When the air conditioner is in a cooling or defrosting mode, the on-off valve on the refrigerant pipeline of the refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger is defined as a first on-off valve, and the on-off valve on the refrigerant pipeline of the refrigerant flowing from the indoor heat exchanger to the outdoor heat exchanger is defined as a second on-off valve, at this time, the control method refers to step S320, the first on-off valve needs to be closed, the second on-off valve is kept in an open state, so that the refrigerant cannot flow into the room, the refrigerant in the indoor heat exchanger still flows to the outdoor under the action of the compressor, the amount of the refrigerant in the indoor heat exchanger is reduced, and the pressure; when the air conditioner is in a heating state, the refrigerant presents opposite flow under the action of the four-way valve, and at the moment, the second opening and closing valve needs to be closed and the opening state of the first opening and closing valve needs to be kept, so that the purposes of reducing the amount of the refrigerant in the indoor heat exchanger and reducing the pressure value are still achieved.
As shown in fig. 2 to 5, in a possible embodiment, the specific implementation of determining the operation mode of the air conditioner in step S310 may be the scheme shown in fig. 3, that is, the outdoor heat exchanger is provided with a second pressure sensor, and the control method includes:
s3111, controlling a second pressure sensor to detect an internal pressure value P2 of the outdoor heat exchanger;
s3112, comparing the sizes of the P1 and the P2;
s3113, when P1 is less than P2, determining that the working mode of the air conditioner is a cooling mode or a defrosting mode;
s3114, when P1 is not less than P2, determining the working mode of the air conditioner as the heating mode.
The specific working mode of the air conditioner is judged by utilizing the characteristic that the indoor heat exchanger and the outdoor heat exchanger are at different pressure values under different working modes of the air conditioner, when the air conditioner is under a refrigeration or defrosting mode, the pressure value of the indoor heat exchanger is smaller than the pressure value of the outdoor heat exchanger, namely P1 is smaller than P2, the air conditioner can be determined to be in the refrigeration or defrosting mode, and similarly, when P1 is larger than or equal to P2, the air conditioner can be determined to be in the heating mode.
Besides the above-mentioned operating mode of the air conditioner being driven by the pressure value, the determining of the operating mode of the air conditioner may be realized by other means, for example, as shown in fig. 4, the operating mode of the air conditioner may also be determined by directly obtaining the currently executed operating program of the air conditioner, and this manner may be realized by directly reading the operating program of the internal controller of the air conditioner without adding a detection device, and specifically includes:
s3121, controlling the air conditioner to check an operation program executed by the air conditioner;
and S3122, judging the working mode of the air conditioner according to the running program.
Because the four-way valve is in different on-off states in the heating mode and the cooling mode, the working mode of the air conditioner can be judged according to the on-off state of the four-way valve, as shown in fig. 5:
s3131, determining the specific working on-off state of the four-way reversing valve;
s3132, judging the working mode of the air conditioner according to the specific working on-off state of the four-way reversing valve.
To this end, a general control method of the air conditioner has been introduced, and although the compressor cannot circulate the refrigerant after stopping the air conditioner, in order to further ensure that the refrigerant cannot continuously flow back to the side of the indoor heat exchanger, the following steps may be further added after step S400: by the method, most of the cold coal in the air conditioning system is sealed at the outdoor heat exchanger side, and the interior of the indoor heat exchanger is still in a negative pressure state, so that excessive refrigerant is not leaked, and finally the purpose of reducing the indoor refrigerant leakage of the air conditioner is achieved.
Particularly, the set pressure value can be flexibly selected according to actual needs, if the selected value is too large, the negative pressure effect is weak, the leakage prevention time and the leakage prevention effect are limited, if the selected value is too small, the indoor heat exchanger can not be supported and burst due to too small pressure value, or if the outdoor side pressure value is too large, the outdoor side pressure value is burst, and at the moment, more refrigerants can be dissipated to the indoor side, or the whole system is directly collapsed, and the control cannot be continued. Through multiple experiments, the inventor finds that the effect is better in the range from 0.05Mpa to 0.09Mpa, when the range is exceeded, the suction force suddenly drops and cannot meet the negative pressure requirement, and when the range is fallen below, the instability probability of the indoor heat exchanger suddenly rises, but the whole system is unstable, and more preferably, 0.07Mpa is selected to achieve the optimal state of balance of the two.
In summary, according to the control method of the present invention, a large amount of refrigerant is transferred to one side of the outdoor heat exchanger, and a negative pressure condition is formed inside the indoor heat exchanger, so that the leakage amount of the refrigerant on the indoor side of the air conditioner is well controlled, and further the safety level of the air conditioner is further improved, and a plurality of replaceable alternatives are provided, so that the air conditioner has a plurality of implementable schemes.
It should be noted that the above-mentioned embodiments are only used for illustrating the principle of the present invention, and are not intended to limit the protection scope of the present invention, and those skilled in the art can modify the above-mentioned structure so that the present invention can be applied to more specific application scenarios without departing from the principle of the present invention.
For example, in an alternative embodiment, the first and second pressure sensors may be electro-contact pressure gauges, but it is apparent that other prior art pressure sensors may be used without departing from the principles of the present invention and, therefore, are intended to be within the scope of the present invention.
In addition, the invention also provides an air conditioner which is provided with the air conditioner in any one of the technical schemes.
Those skilled in the art will appreciate that the air conditioner described above may also include other known structures such as processors, controllers, memories, etc., wherein the memories include, but are not limited to, ram, flash, rom, prom, volatile, non-volatile, serial, parallel, or registers, etc., and the processors include, but are not limited to, CPLD/FPGA, DSP, ARM processor, MIPS processor, etc. Such well-known structures are not shown in the drawings in order to not unnecessarily obscure embodiments of the present disclosure.
Although the foregoing embodiments describe the steps in the above sequential order, those skilled in the art will understand that, in order to achieve the effects of the present embodiment, the different steps need not be executed in such an order, and may be executed simultaneously (in parallel) or in an inverse order, for example, step S200 is executed to detect the internal pressure value P1, and step S300 is executed to control the air conditioner refrigerant to flow to the outdoor heat exchanger, which may obviously be executed in parallel, and these simple changes are within the protection scope of the present invention.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. A control method for reducing indoor side refrigerant leakage of an air conditioner comprises an indoor heat exchanger, an outdoor heat exchanger and a compressor, wherein a first pressure sensor is arranged on the indoor heat exchanger, and the control method comprises the following steps:
determining whether the refrigerant leaks;
when the refrigerant leakage is determined, detecting an internal pressure value P1 of the indoor heat exchanger through the first pressure sensor;
controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger, and controlling the refrigerant of the indoor heat exchanger to continue flowing to the outdoor heat exchanger;
when the pressure P1 is less than or equal to a set pressure value, controlling the compressor to stop;
wherein the set pressure value is less than the standard atmospheric pressure.
2. The control method for reducing indoor side refrigerant leakage of an air conditioner as claimed in claim 1, wherein a first opening and closing valve and a second opening and closing valve are respectively provided on two refrigerant pipelines connecting the outdoor heat exchanger and the indoor heat exchanger,
the step of controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger and controlling the refrigerant of the indoor heat exchanger to continue flowing to the outdoor heat exchanger specifically comprises the following steps:
determining an operating mode of the air conditioner;
when the air conditioner is in a cooling mode or a defrosting mode, closing the first opening and closing valve and keeping the second opening and closing valve in an opening state;
in the cooling mode or the defrosting mode, the first on-off valve is an on-off valve on a refrigerant pipeline through which the refrigerant flows from the outdoor heat exchanger to the indoor heat exchanger, and the second on-off valve is an on-off valve on a refrigerant pipeline through which the refrigerant flows from the indoor heat exchanger to the outdoor heat exchanger.
3. The method as claimed in claim 2, wherein the step of controlling the refrigerant of the outdoor heat exchanger to stop flowing to the indoor heat exchanger and to continue flowing to the outdoor heat exchanger further comprises:
when the air conditioner is in a heating mode, the second opening and closing valve is closed, and the opening state of the first opening and closing valve is maintained.
4. The control method for reducing indoor refrigerant leakage of an air conditioner as claimed in claim 2, wherein the outdoor heat exchanger is provided with a second pressure sensor, and the step of determining the operation mode of the air conditioner specifically comprises:
controlling the second pressure sensor to detect an internal pressure value P2 of the outdoor heat exchanger;
comparing the sizes of P1 and P2;
when P1 < P2, determining that the working mode of the air conditioner is a cooling mode or a defrosting mode.
5. The control method for reducing indoor refrigerant leakage of an air conditioner as set forth in claim 4, wherein the step of determining the operation mode of the air conditioner further includes:
when P1 is more than or equal to P2, the working mode of the air conditioner is determined as a heating mode.
6. The control method for reducing indoor refrigerant leakage of an air conditioner as claimed in claim 2, wherein the step of determining the operation mode of the air conditioner includes:
controlling the air conditioner to check an operation program executed by the air conditioner;
and judging the working mode of the air conditioner according to the running program.
7. The control method for reducing indoor refrigerant leakage of an air conditioner as claimed in claim 2, wherein the air conditioner further comprises a four-way reversing valve, and the step of determining the operation mode of the air conditioner specifically comprises:
determining the specific working on-off state of the four-way reversing valve;
and judging the working mode of the air conditioner according to the specific working on-off state of the four-way reversing valve.
8. The control method for reducing the leakage amount of the refrigerant on the indoor side of the air conditioner as claimed in any one of claims 2 to 7, wherein after the step of controlling the compressor to stop when P1 is less than or equal to a set pressure value, the control method further comprises:
the first open-close valve and the second open-close valve are brought into a closed state.
9. The control method for reducing indoor refrigerant leakage of an air conditioner as claimed in claim 1, wherein the set pressure value is 0.07 Mpa; and/or the like and/or,
the first pressure sensor is an electric contact pressure gauge.
10. An air conditioner characterized in that the air conditioner is the air conditioner according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010424534.2A CN111720950A (en) | 2020-05-19 | 2020-05-19 | Control method for reducing indoor side refrigerant leakage of air conditioner and air conditioner |
Applications Claiming Priority (1)
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