CN112503720A

CN112503720A - Refrigerant leakage protection method, air conditioning equipment and readable storage medium

Info

Publication number: CN112503720A
Application number: CN202011422006.XA
Authority: CN
Inventors: 李骏; 高东东
Original assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Current assignee: GD Midea Heating and Ventilating Equipment Co Ltd; Hefei Midea Heating and Ventilating Equipment Co Ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-03-16
Anticipated expiration: 2040-12-08
Also published as: CN112503720B

Abstract

The embodiment of the invention provides a refrigerant leakage protection method, air conditioning equipment and a readable storage medium, wherein the refrigerant leakage protection method comprises the steps of obtaining the refrigerant concentration of a space where at least one indoor unit is located; determining the opening degree of a valve port of the cut-off device and the operation parameters of the outdoor unit according to the concentration of the refrigerant; and controlling the operation of the cut-off device and the outdoor unit according to the opening degree of the valve port and the operation parameters so as to recycle the refrigerant in the pipeline to a pipe section connected with an exhaust port of a compressor in the outdoor unit. In the technical scheme of the invention, the opening degree of the valve port of the cut-off device and the operation parameters of the outdoor unit are determined according to the concentration of the refrigerant, so that further leakage of the refrigerant can be effectively limited, the refrigerant in the pipeline is recycled to the outdoor unit, the concentration of the refrigerant in a room is reduced, the safety risk caused by refrigerant leakage is eliminated in time, and the use safety of the combustible refrigerant air conditioning equipment is improved.

Description

Refrigerant leakage protection method, air conditioning equipment and readable storage medium

Technical Field

The invention relates to the technical field of air conditioning equipment, in particular to a refrigerant leakage protection method, air conditioning equipment and a readable storage medium.

Background

With the increasing requirements of environmental protection on air conditioning technology, more environment-friendly and energy-saving environment-friendly refrigerants are selected for novel air conditioners. However, the refrigerant is often flammable, which limits the application of the refrigerant. In order to solve the problem, the method adopted by the prior art is mainly to cut off the refrigerant immediately when the refrigerant is found to leak, so as to prevent the refrigerant in the outdoor unit from continuously entering the room. However, the refrigerant in the indoor unit of the air conditioner still leaks, so that the safety risk cannot be eliminated in time, and the further application of the environment-friendly refrigerant is limited.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

In view of the above, a first aspect of the embodiments of the present invention provides a refrigerant leakage protection method.

A second aspect of embodiments of the present invention provides an air conditioning apparatus.

A third aspect of embodiments of the present invention provides a readable storage medium.

In order to achieve the above object, an embodiment of a first aspect of the present invention provides a refrigerant leakage protection method for an air conditioning apparatus, where the air conditioning apparatus includes an outdoor unit and a plurality of indoor units connected to the outdoor unit through a pipeline, the pipeline is provided with a cutoff device, and the refrigerant leakage protection method includes: obtaining the refrigerant concentration of a space where at least one indoor unit is located; determining the opening degree of a valve port of the cut-off device and the operation parameters of the outdoor unit according to the concentration of the refrigerant; and controlling the operation of the cut-off device and the outdoor unit according to the opening degree of the valve port and the operation parameters so as to recycle the refrigerant in the pipeline to a pipe section connected with an exhaust port of a compressor in the outdoor unit.

According to the refrigerant leakage protection method provided by the embodiment of the first aspect of the present invention, the air conditioning equipment includes an outdoor unit, the plurality of indoor units are connected to the outdoor unit through pipelines, and the refrigerant enters the indoor units from the outdoor unit through the pipelines, is conditioned and then returns to the outdoor unit. The pipeline is provided with a cut-off device which can cut off the flow of the refrigerant in the pipeline. The refrigerant leakage protection method includes the steps of firstly obtaining the refrigerant concentration of a space where one or more indoor units are located, and judging whether the indoor unit is in the room where the indoor unit is located and has refrigerant leakage or not. Obviously, if the refrigerant concentration is directly related to the refrigerant leakage, whether the refrigerant leaks or not and the severity of the refrigerant leakage can be directly judged according to the refrigerant concentration. On the basis, the opening degree of a valve port of the cutoff device and the operation parameters of the outdoor unit are determined according to the concentration of the refrigerant. Here, the opening degree of the valve port of the blocking device is the opening degree of the valve port of the blocking device of the pipe line connecting the indoor unit and the outdoor unit. The opening of the valve port is adjusted, so that the flow of the refrigerant in the pipeline can be adjusted. It can be understood that the smaller the opening degree of the valve port is, the smaller the flow rate of the refrigerant entering the pipeline from the outdoor unit is. The opening degree of the valve port is reduced, the flow of the refrigerant flowing into the pipeline can be reduced, and further leakage of the refrigerant is limited. Meanwhile, according to the concentration of the refrigerant, the operation parameters of the outdoor unit are set so as to be matched with the adjustment of the opening degree of the valve port. The operation parameters of the outdoor unit are parameters for controlling the operation state of the outdoor unit, and the operation state of the outdoor unit can be changed by adjusting the operation parameters, so that the refrigerant in the pipeline returns to the outdoor unit as fast as possible. It can be understood that by setting the opening degree of the valve port and the operation parameters, the operation of the cut-off device and the outdoor unit is controlled, on one hand, the inflow of the refrigerant of the outdoor unit into the room can be weakened, so that the refrigerant of the outdoor unit is prevented from further leaking into the room, meanwhile, the operation state of the outdoor unit is changed through the operation parameters, the backflow of the refrigerant in the pipeline to the outdoor unit can be accelerated, the concentration of the refrigerant in the room is finally reduced, and the safe concentration range is finally achieved. Therefore, the valve port opening of the cut-off device and the operation parameters of the outdoor unit are determined according to the refrigerant concentration, further leakage of the refrigerant can be effectively limited, the refrigerant in the pipeline is recycled to the outdoor unit, the indoor refrigerant concentration is reduced, safety risks caused by refrigerant leakage are eliminated in time, the use safety of the combustible refrigerant air conditioning equipment is improved, and the combustible refrigerant can be safely used.

It should be noted here that, the opening degree of the valve port and the setting of the operation parameters are different according to the concentration of the refrigerant, so that effective recovery of different concentrations of the refrigerant can be realized to ensure the safety of the air conditioning equipment.

In addition, the refrigerant leakage protection method in the above scheme provided by the invention can also have the following additional technical characteristics:

in the above technical solution, the pipeline includes a main pipeline group and a plurality of branch pipeline groups communicated with the main pipeline group, wherein the cut-off device is disposed on the main pipeline group and/or at least one branch pipeline group.

In the technical scheme, a main pipeline group in the pipelines comprises at least one main pipeline, and a plurality of branch pipeline groups are communicated with the main pipeline group. It should be noted that the main pipeline is communicated with the branch pipeline group, and the branch pipeline group comprises at least one branch pipeline. Through the main pipeline group and the branch pipeline groups communicated with the main pipeline group, the air conditioning equipment can independently condition more rooms through the main pipeline group and the branch pipeline groups.

Further, the cutoff device is disposed on the main pipeline group, and it can be understood that the cutoff device disposed on the main pipeline group can adjust the flow rate of the refrigerant of the main pipeline in the main pipeline group. Because the main pipeline is connected with the branch pipeline group, the flow of the refrigerant of the main pipeline of the cut-off device can be adjusted, and the flow of the branch pipeline group connected with the cut-off device can be adjusted at the same time.

Furthermore, a cut-off device is also arranged on the branch pipeline group, and the cut-off device arranged on the branch pipeline group can be arranged on a single branch pipeline so as to adjust the flow rate of the refrigerant of the branch pipeline.

By setting the cutoff devices for the main pipeline group and the branch pipeline group, the flow rates of the refrigerant in the main pipeline group and the refrigerant in the branch pipelines can be controlled.

Among the above-mentioned technical scheme, the device that cuts is located on the main pipeline group, and according to the refrigerant concentration determination device's valve port aperture and the operating parameter of off-premises station, specifically include: when the concentration of the refrigerant is in a first cutoff concentration range, determining a first opening and a first parameter according to a preset recovery mode; controlling the operation of the cut-off device according to the first opening degree, controlling the operation of a compressor of the outdoor unit according to the first frequency, and controlling the operation of a fan of the outdoor unit according to the first air speed; acquiring the pipeline pressure of a pipeline connecting each indoor unit in the air conditioning equipment with an air suction port of a compressor; and when the pipeline pressure is smaller than the first pressure threshold value, controlling the opening degree of a valve port of the cut-off device to be 0.

In the technical scheme, when the concentration of the refrigerant is in a first cut-off concentration range, a first opening and a first parameter are determined according to the recovery mode. The pre-recovery mode is a preset value of the opening of the truncation device and the operation parameters of the outdoor unit aiming at different refrigerant concentrations. When the concentration of the refrigerant is in the first cut-off concentration range, the opening degree of the cut-off device is a first opening degree, and the operation parameter of the outdoor unit is a first parameter. The first parameter includes that the running frequency of the outdoor unit is a first frequency, and the running wind speed of a fan of the outdoor unit is a first wind speed.

Further, when the opening degree of the cutoff device, the frequency of the outdoor unit and the wind speed are adjusted, the pipeline pressure of the air conditioning equipment is obtained. The pressure in the pipeline is the pressure at the position where the refrigerant flows back to the outdoor unit from the pipeline, that is, the pressure in the pipeline connecting each indoor unit with the suction port of the compressor. It is understood that the lower the line pressure, the more sufficient the refrigerant is returned from the line to the outdoor unit, that is, the lower the concentration of the leaked refrigerant.

Further, continuously acquiring the pipeline pressure, and controlling the opening of the cut-off device to be 0 when the pipeline pressure is smaller than the first pressure value. It should be noted that the first pressure value is a pressure value at which the refrigerant concentration has dropped to a substantially safe level. At this time, the valve port opening of the cutoff device is controlled to be 0, that is, the cutoff device is turned off. At this time, the refrigerant does not flow into the pipeline any more, and therefore the refrigerant does not leak.

It should be noted that the cutoff device is not immediately turned off until the line pressure is less than the first pressure threshold. In the preset recovery mode, the cut-off device changes the flow rate of the refrigerant flowing into the pipeline, but a certain flow rate of the refrigerant enters the pipeline. Therefore, before the pipeline pressure is smaller than the first pressure threshold value, the air conditioning device at the corresponding position can also continue air conditioning, and the use of a user is not obviously influenced.

Among the above-mentioned technical scheme, according to the refrigerant concentration determination cut-off device's valve port opening and the operating parameter of off-premises station, specifically include: when the concentration of the refrigerant is in a second cutoff concentration range, determining a second frequency and a second air speed; controlling the compressor of the outdoor unit to operate according to the second frequency, and controlling the fan of the outdoor unit to operate according to the second air speed; controlling the valve port of the cut-off device to be reduced to a second opening degree, and obtaining the concentration of the refrigerant within the reexamination time; if the concentration of the refrigerant is less than the lower limit value of the second cutoff concentration range, controlling the valve port to be fully opened, and controlling the compressor and the fan to operate according to a normal heat exchange mode; and if the concentration of the refrigerant is in a first cut-off range, controlling the operation of the air conditioning equipment according to a preset recovery mode, wherein the lower limit value of the first cut-off concentration range is larger than the upper limit value of the second cut-off concentration range.

In this embodiment, the upper limit value of the second cutoff concentration range is smaller than the lower limit value of the first cutoff concentration range. It is understood that the second frequency, the second wind speed, and the second opening degree of the cutoff device are mainly set to the second cutoff concentration which is smaller than the first cutoff concentration range, and it is generally considered that the first cutoff concentration is set to a range where the refrigerant concentration is high and the second cutoff concentration is set to a range where the refrigerant concentration is low.

The frequency of the compressor of the outdoor unit is set to be the second frequency, and the wind speed of the fan is set to be the second wind speed, so that the refrigerant can be accelerated to flow back to the outdoor unit from the pipeline. It can be understood that, by such an arrangement, the concentration of the leaked refrigerant can be reduced to a safe range quickly.

Further, the concentration of the refrigerant is detected within the review time to determine whether the concentration is less than the lower limit value of the second cutoff concentration range. Here, the lower limit value of the second cutoff concentration is a safe range of the refrigerant concentration, and thus, when the refrigerant concentration has decreased to the lower limit value of the second cutoff concentration, it is described that the refrigerant concentration has entered the safe range. The rechecking time is the time for the detection device to periodically check the concentration of the refrigerant.

Since the second cutoff concentration is a small refrigerant concentration, it is considered that the leakage of the refrigerant is not serious. In order to avoid influencing the use of the air conditioning device by a user, when the concentration of the refrigerant is smaller than the lower limit value of the second truncation range, the control valve port is fully opened, and the compressor and the fan are controlled to operate according to a normal heat exchange mode, so that the user can normally use the air conditioning device. Therefore, the safety of the air conditioning device is guaranteed, the user can use the air conditioning device normally, and the air conditioning device obtains the best user experience on the premise of guaranteeing the safety.

Of course, when the concentration of the refrigerant is detected during the review time, there may be a case where the concentration of the refrigerant does not decrease but increases and is within the first cutoff range. This case explains that the air conditioner cannot be normally used due to refrigerant leakage. Therefore, after the refrigerant is recovered to the outdoor unit, the valve port of the cut-off device should be closed in time to prevent the refrigerant from further leaking.

Among the above-mentioned technical scheme, the main pipeline group includes a plurality of main pipelines, cuts the device and includes a plurality of valve bodies of locating on a plurality of main pipelines respectively, and when line pressure is less than first pressure threshold value, the valve port aperture that the device was cut in the control is 0, specifically includes: and when the pipeline pressure is smaller than the first pressure threshold value, controlling the opening degree of a valve body arranged on the pipeline with the minimum pipeline pressure in the pipelines to be 0.

In this technical solution, the main piping group includes a plurality of main pipings, and thus can supply the refrigerant to the plurality of main pipings at the same time. Cut the device including locating a plurality of valve bodies on a plurality of main lines respectively, it is very obvious, a plurality of valve bodies are located a plurality of main lines respectively for different main lines can be shut off through the valve body alone, do not influence other main lines.

It can be understood that when the line pressure is less than the first pressure threshold, the line pressure of the line with the lowest pressure among the plurality of lines has the lowest concentration of the refrigerant, and thus the valve body is closed. At this time, the valve port opening is set to 0, and the valve can be closed.

Generally speaking, a plurality of main pipelines of the air conditioning device can lead to different rooms, so that the valve bodies arranged on the different main pipelines can not influence the use of other main pipelines when the main pipelines are switched off, and thus, users in different rooms cannot be influenced by the switching off of the main pipelines.

In the above technical solution, the main pipeline group includes two main pipelines, and the cutoff device includes two valve bodies; or the main pipeline group comprises three main pipelines, and the cut-off device comprises three valve bodies, wherein each valve body is arranged on one main pipeline.

In the technical scheme, the main pipeline group comprises two main pipelines, the cut-off device comprises two valve bodies, each main pipeline is provided with one valve body, and flow regulation can be performed on each main pipeline.

Further, the main pipeline group comprises three main pipelines, the cut-off device comprises three valve bodies, and each main pipeline is provided with one valve body, so that the flow of each main pipeline can be regulated.

In the above technical solution, the refrigerant leakage protection method further includes: and if the concentration of the refrigerant is within the first cutoff range, sending alarm information to a target terminal.

In the technical scheme, when the concentration of the refrigerant is within the first cutoff range, alarm information can be sent to the target terminal, so that the target terminal can inform related personnel of checking and maintaining in time. In addition, the alarm information can be reported, and users in a room with high refrigerant concentration can be reminded in time to evacuate in time, so that the safety is guaranteed.

Among the above-mentioned technical scheme, air conditioning equipment still includes communication device, is connected with the device electricity of cutting, and the refrigerant concentration who obtains at least one indoor set place space specifically includes: the control communication device is electrically connected with the detection device in the space where the at least one indoor unit is located; and receiving the refrigerant concentration acquired by the detection device through the communication device.

In the technical scheme, the air conditioning equipment further comprises a communication device which is electrically connected with the detection device of the space where the indoor unit is located so as to receive the concentration of the refrigerant obtained by the detection device. In addition, the communication device is also electrically connected with the cut-off device, and the cut-off device can be further controlled according to the concentration value of the refrigerant so as to adjust the opening of the valve body.

Among the above-mentioned technical scheme, refrigerant concentration includes a plurality of concentration gears, before the operation parameter of the valve port aperture of confirming the cut-off device and off-premises station according to refrigerant concentration, still includes: acquiring the operation duration of the detection device and controlling the alarm frequency of the valve port opening of the cut-off device to be 0 within the operation duration; determining a corresponding concentration gear according to the operation time length and the alarm frequency; determining a first cutoff concentration range and/or a second cutoff concentration range according to the concentration range; according to refrigerant concentration determination cut-off device's valve port opening and the operating parameter of off-premises station, specifically include: and determining the opening degree of a valve port of the cutoff device and the operation parameters of the outdoor unit according to the concentration of the refrigerant and the first cutoff concentration range and/or the second cutoff concentration range corresponding to the concentration gear.

In the technical scheme, the refrigerant concentration comprises a plurality of concentration gears, and a first cutoff concentration range and a second cutoff concentration range can be determined according to the concentration gears so as to determine different preset recovery modes. It should be noted here that the length of operation and the number of alarms have an influence on the determination of the concentration range. When the operation duration of the detection device is prolonged, the detection sensitivity of the detection device is also changed correspondingly, so that the concentration gear should be correspondingly adjusted according to the operation duration of the detection device. Similarly, the alarm frequency that the opening of the valve port of the cutoff device is 0 is increased, which indicates that the air conditioning equipment has a high probability of refrigerant leakage, and therefore, the corresponding concentration gear should be correspondingly adjusted so as to alarm in time when the refrigerant leaks. Therefore, the corresponding concentration gear is determined according to the operation time and the alarm frequency, the refrigerant leakage risk of the air conditioning equipment can be better responded, and the safety of the air conditioning equipment is ensured.

Furthermore, after the corresponding concentration range is determined according to the operation time length and the alarm frequency, a first cut-off concentration range and a second cut-off concentration range can be determined according to the concentration range. It is obvious that the first cut-off concentration range and the second cut-off concentration range determined in this way can better adapt to changes of the detection device and changes of the air conditioning device, and the preset recovery mode can be set specifically to ensure the safety of the air conditioning device.

Further, according to the detected refrigerant concentration and a first cutoff concentration range and a second cutoff concentration range corresponding to the concentration gear, a preset recovery mode, namely the opening degree of a valve port of the cutoff device and the operation parameters of the outdoor unit, is determined, and leakage of the refrigerant is processed timely.

In the above technical solution, determining the corresponding concentration gear according to the operation duration and the alarm frequency specifically includes: determining a first concentration gear corresponding to the operation time; determining a second concentration gear corresponding to the alarm times; judging whether the first concentration gear is consistent with the second concentration gear, and generating a judgment result; determining the first cut-off concentration range and/or the second cut-off concentration range according to the concentration range specifically includes: and determining a first cutoff concentration range and/or a second cutoff concentration range according to the judgment result, wherein the longer the operation time is, the higher the first concentration range is, the more the alarm times are, and the higher the second concentration range is.

According to the technical scheme, when the corresponding concentration gear is determined according to the operation time length and the alarm frequency, the first concentration gear is determined according to the operation time length, and the second concentration gear is determined according to the alarm frequency. The operation time length and the alarm times do not influence the determination of the first concentration gear and the second concentration gear. It should be noted that the longer the operation time, the higher the first concentration range, the more the number of alarms, and the higher the second concentration range. It will be appreciated that the longer the detection means is in operation, the poorer the sensitivity thereof, and therefore it is necessary to increase the first concentration range in order to cope with the reduced sensitivity of the detection means. Similarly, the more the number of times of alarm is, the greater the possibility of refrigerant leakage of the air conditioning equipment is, so that the second concentration shift needs to be increased, so as to control refrigerant leakage earlier and improve the safety of the air conditioning equipment.

Further, if the first concentration range coincides with the second concentration range, the first cut-off concentration range and the second cut-off concentration may be determined using the first concentration range or the second concentration range. It is clear that, since the first concentration range coincides with the second concentration range, the result is the same whether the first concentration range or the second concentration range is used.

In the above technical solution, determining the first cut-off concentration range and/or the second cut-off concentration range according to the determination result specifically includes: when the judgment result is yes, determining a first cut-off concentration range and/or a second cut-off concentration range according to the first concentration range or the second concentration range; and when the judgment result is negative, determining a first cutoff concentration range and/or a second cutoff concentration range according to the lower gear of the first concentration gear and the second concentration gear, wherein the gear is positively correlated with the lower limit value of the first cutoff concentration range.

In the technical scheme, whether the first concentration gear is consistent with the second concentration gear is judged. When the first concentration gear is consistent with the second concentration gear, obviously, the first cut-off concentration range and the second cut-off concentration range can be determined according to the first concentration gear or the second concentration gear due to the consistency of the first concentration gear and the second concentration gear, and the effects are the same; when the first concentration range and the second concentration range do not coincide with each other, the lower one of the first concentration range and the second concentration range should be used to determine the first cut-off concentration and the second cut-off concentration. Therefore, the first cutoff concentration range and the second cutoff concentration range can be set to be the most accurate ranges, and the refrigerant leakage can be accurately responded. It should be noted that the gear is positively correlated with the lower limit value of the first cut-off concentration range, because the lower limit value of the first cut-off concentration range corresponds to different preset recovery modes, the gear of the air conditioning system is positively correlated with the lower limit value of the first cut-off concentration range, and the preset recovery mode can be accurately set by setting the gear, so that the air conditioning system can more accurately cope with refrigerant leakage, and the safety of the air conditioning system is ensured.

An embodiment of a second aspect of the present invention provides an air conditioning apparatus, including an outdoor unit, a plurality of indoor units, each indoor unit being connected to the outdoor unit through a pipeline, the pipeline being provided with a cut-off device; the processor is electrically connected with the truncating device, the memory stores programs or instructions, and the processor is used for implementing the steps of the refrigerant leakage protection method in any one of the first aspect embodiments when the programs or the instructions are executed.

According to a second aspect of the present invention, an air conditioning apparatus is provided, which includes an outdoor unit and a plurality of indoor units, and a processor and a memory. Each indoor unit is connected with the outdoor unit through a pipeline, a cut-off device is arranged on the pipeline, and the corresponding pipeline can be closed or restrained through the cut-off device so as to adjust the flow of the pipeline; the processor is electrically connected with the cut-off device and used for controlling the cut-off device. The memory stores a program or an instruction, and the processor is configured to implement the steps of the refrigerant leakage protection method when executing the program or the instruction, so that the air conditioning equipment of the present invention has all the beneficial effects of the refrigerant leakage protection method in any of the above embodiments, and details are not described herein again.

An embodiment of a third aspect of the present invention provides a readable storage medium, on which a program or an instruction is stored, where the program or the instruction is executed by a processor to implement the steps of any of the refrigerant leakage protection methods in the first aspect.

Through the embodiments of the computer-readable storage medium of the present invention, a computer program is stored thereon, and when the computer program is executed by a processor, the steps of the refrigerant leakage protection method in any of the embodiments are implemented, so that all the beneficial effects of the refrigerant leakage protection method in any of the embodiments are achieved, and details are not described herein.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a flow chart illustrating a refrigerant leakage protection method according to an embodiment of the invention;

fig. 2 is a flow chart illustrating a refrigerant leakage protection method according to an embodiment of the invention;

fig. 3 is a flow chart illustrating a refrigerant leakage protection method according to an embodiment of the invention;

fig. 4 is a flow chart illustrating a refrigerant leakage protection method according to an embodiment of the invention;

fig. 5 shows a schematic configuration diagram of an air conditioning apparatus according to an embodiment of the present invention;

fig. 6 shows a schematic configuration diagram of an air conditioning apparatus according to an embodiment of the present invention;

fig. 7 shows a schematic configuration diagram of an air conditioning apparatus according to an embodiment of the present invention;

FIG. 8 illustrates a graphical representation of a plurality of warning ranges versus operating duration and number of warnings, according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 5 to 7 is:

500: an air conditioning device; 502: an outdoor unit; 504: an indoor unit; 506: a pipeline; 508: a main pipeline; 510: a branch pipeline; 512: a cut-off device; 516: a detection device; 518: a processor; 520: a memory.

Detailed Description

In order that the above objects, features and advantages of the embodiments of the present invention can be more clearly understood, embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and detailed description. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, embodiments of the present invention may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

Some embodiments according to the invention are described below with reference to fig. 1 to 8.

Example one

As shown in fig. 1, the method for protecting refrigerant leakage according to the present embodiment includes: step S102: obtaining the refrigerant concentration of a space where at least one indoor unit is located; step S104: determining the opening degree of a valve port of the cut-off device and the operation parameters of the outdoor unit according to the concentration of the refrigerant; step S106: and controlling the operation of the cut-off device and the outdoor unit according to the opening degree of the valve port and the operation parameters so as to recycle the refrigerant in the pipeline to a pipe section connected with an exhaust port of a compressor in the outdoor unit.

The air conditioning equipment in the embodiment comprises an outdoor unit, wherein a plurality of indoor units are connected with the outdoor unit through pipelines, and a refrigerant can enter the indoor units from the outdoor unit through the pipelines and then return to the outdoor unit after being conditioned. The pipeline is provided with a cut-off device which can cut off the flow of the refrigerant in the pipeline. The refrigerant leakage protection method includes the steps of firstly obtaining the refrigerant concentration of a space where one or more indoor units are located, and judging whether the indoor unit is in the room where the indoor unit is located and has refrigerant leakage or not. Obviously, if the refrigerant concentration is directly related to the refrigerant leakage, whether the refrigerant leaks or not and the severity of the refrigerant leakage can be directly judged according to the refrigerant concentration.

On the basis, the opening degree of a valve port of the cutoff device and the operation parameters of the outdoor unit are determined according to the concentration of the refrigerant. Here, the opening degree of the valve port of the blocking device is the opening degree of the valve port of the blocking device of the pipe line connecting the indoor unit and the outdoor unit. The opening of the valve port is adjusted, so that the flow of the refrigerant in the pipeline can be adjusted. It can be understood that the smaller the opening degree of the valve port is, the smaller the flow rate of the refrigerant entering the pipeline from the outdoor unit is. The opening degree of the valve port is reduced, the flow of the refrigerant flowing into the pipeline can be reduced, and further leakage of the refrigerant is limited. Meanwhile, according to the concentration of the refrigerant, the operation parameters of the outdoor unit are set so as to be matched with the adjustment of the opening degree of the valve port. The operation parameters of the outdoor unit are parameters for controlling the operation state of the outdoor unit, and the operation state of the outdoor unit can be changed by adjusting the operation parameters, so that the refrigerant in the pipeline returns to the outdoor unit as fast as possible. It can be understood that by setting the opening degree of the valve port and the operation parameters, the operation of the cut-off device and the outdoor unit is controlled, on one hand, the inflow of the refrigerant of the outdoor unit into the room can be weakened, so that the refrigerant of the outdoor unit is prevented from further leaking into the room, meanwhile, the operation state of the outdoor unit is changed through the operation parameters, the backflow of the refrigerant in the pipeline to the outdoor unit can be accelerated, the concentration of the refrigerant in the room is finally reduced, and the safe concentration range is finally achieved. Therefore, the opening degree of the valve port of the cut-off device and the operation parameters of the outdoor unit are determined according to the concentration of the refrigerant, further leakage of the refrigerant can be effectively limited, the refrigerant in the pipeline is recycled to the outdoor unit, the concentration of the indoor refrigerant is reduced, safety risks caused by refrigerant leakage are eliminated in time, and the use safety of the combustible refrigerant air conditioning equipment is improved.

Example two

As shown in fig. 2, the refrigerant leakage protection method provided in this embodiment includes: step S202: obtaining the refrigerant concentration of a space where at least one indoor unit is located; step S204: when the concentration of the refrigerant is in a first cutoff concentration range, determining a first opening and a first parameter according to a preset recovery mode; step S206: controlling the operation of the cut-off device according to the first opening degree, controlling the operation of a compressor of the outdoor unit according to the first frequency, and controlling the operation of a fan of the outdoor unit according to the first air speed; step S208: acquiring the pipeline pressure of air conditioning equipment; step S210: when the pipeline pressure is smaller than a first pressure threshold value, controlling the opening degree of a valve port of the cut-off device to be 0; step S212: and controlling the operation of the cut-off device and the outdoor unit according to the opening degree of the valve port and the operation parameters so as to recycle the refrigerant in the pipeline to a pipe section connected with an exhaust port of a compressor in the outdoor unit.

When the refrigerant concentration is within the first cutoff concentration range, a first opening and a first parameter are determined according to the recovery mode. The pre-recovery mode is a preset value of the opening of the truncation device and the operation parameters of the outdoor unit aiming at different refrigerant concentrations. When the concentration of the refrigerant is in the first cut-off concentration range, the opening degree of the cut-off device is a first opening degree, and the operation parameter of the outdoor unit is a first parameter. The first parameter includes that the running frequency of the outdoor unit is a first frequency, and the running wind speed of a fan of the outdoor unit is a first wind speed.

Further, when the opening degree of the cutoff device, the frequency of the outdoor unit and the wind speed are adjusted, the pipeline pressure of the air conditioning equipment is obtained. The pipeline pressure of the air conditioning equipment is the pressure value of the position where the refrigerant flows back to the outdoor unit from the pipeline. It is understood that the lower the line pressure, the more sufficient the refrigerant is returned from the line to the outdoor unit, that is, the lower the concentration of the leaked refrigerant.

Further, when the concentration of the refrigerant is within the first cutoff range, alarm information can be sent to the target terminal, so that the target terminal can timely inform relevant personnel of checking and maintaining. In addition, the alarm information can be reported, and users in a room with high refrigerant concentration can be reminded in time to evacuate in time, so that the safety is guaranteed.

Furthermore, the air conditioning equipment also comprises a communication device which is electrically connected with the detection device of the space where the indoor unit is located so as to receive the concentration of the refrigerant obtained by the detection device. In addition, the communication device is also electrically connected with the cut-off device, and the cut-off device can be further controlled according to the concentration value of the refrigerant so as to adjust the opening of the valve body.

EXAMPLE III

As shown in fig. 3, the refrigerant leakage protection method provided in this embodiment includes: step S302: obtaining the refrigerant concentration of a space where at least one indoor unit is located; step S304: when the concentration of the refrigerant is in a second cutoff concentration range, determining a second frequency and a second air speed; step S306: controlling the compressor of the outdoor unit to operate according to the second frequency, and controlling the fan of the outdoor unit to operate according to the second air speed; step S308: controlling the valve port of the cut-off device to be reduced to a second opening degree, and obtaining the concentration of the refrigerant within the reexamination time; step S310: if the concentration of the refrigerant is less than the lower limit value of the second cutoff concentration range, controlling the valve port to be fully opened, and controlling the compressor and the fan to operate according to a normal heat exchange mode; step S312: if the concentration of the refrigerant is in the first cutoff range, controlling the operation of the air conditioning equipment according to a preset recovery mode; step S314: and controlling the operation of the cut-off device and the outdoor unit according to the opening degree of the valve port and the operation parameters so as to recycle the refrigerant in the pipeline to a pipe section connected with an exhaust port of a compressor in the outdoor unit.

Further, when the refrigerant concentration is within the first cutoff concentration range, the first opening degree and the first parameter are determined according to the recovery mode. The pre-recovery mode is a preset value of the opening of the truncation device and the operation parameters of the outdoor unit aiming at different refrigerant concentrations. When the concentration of the refrigerant is in the first cut-off concentration range, the opening degree of the cut-off device is a first opening degree, and the operation parameter of the outdoor unit is a first parameter. The first parameter includes that the running frequency of the outdoor unit is a first frequency, and the running wind speed of a fan of the outdoor unit is a first wind speed.

Further, the main pipeline group comprises a plurality of main pipelines, and the cut-off device comprises a plurality of valve bodies respectively arranged on the main pipelines. The main pipeline group comprises a plurality of main pipelines, so that the refrigerant can be provided for the main pipelines at the same time. Cut the device including locating a plurality of valve bodies on a plurality of main lines respectively, it is very obvious, a plurality of valve bodies are located a plurality of main lines respectively for different main lines can be shut off through the valve body alone, do not influence other main lines.

In a specific embodiment, the main pipeline group comprises two main pipelines, the cutoff device comprises two valve bodies, and each main pipeline is provided with one valve body, so that the flow of each main pipeline can be regulated.

Example four

As shown in fig. 4, the method for protecting refrigerant leakage according to the present embodiment includes: step S402: the control communication device is electrically connected with the detection device in the space where the at least one indoor unit is located; step S404: receiving the refrigerant concentration obtained by the detection device through the communication device; step S406: acquiring the operation duration of the detection device and controlling the alarm frequency of the valve port opening of the cut-off device to be 0 within the operation duration; step S408: determining a corresponding concentration gear according to the operation time length and the alarm frequency; step S410: determining a first concentration gear corresponding to the operation time; step S412: determining a second concentration gear corresponding to the alarm times; step S414: judging whether the first concentration gear is consistent with the second concentration gear; if yes, go to step S416: determining a first cut-off concentration range and a second cut-off concentration range according to the first concentration range or the second concentration range; if the result of step S414 is no, step S418 is executed: determining a first cutoff concentration range and a second cutoff concentration range according to the lower one of the first concentration range and the second concentration range; step S420: determining the opening degree of a valve port of the cutoff device and the operation parameters of the outdoor unit according to the concentration of the refrigerant and a first cutoff concentration range and a second cutoff concentration range corresponding to the concentration gears; step S422: and controlling the operation of the cut-off device and the outdoor unit according to the opening degree of the valve port and the operation parameters so as to recycle the refrigerant in the pipeline to a pipe section connected with an exhaust port of a compressor in the outdoor unit.

The air conditioning equipment in the embodiment comprises an outdoor unit, wherein a plurality of indoor units are connected with the outdoor unit through pipelines, and a refrigerant can enter the indoor units from the outdoor unit through the pipelines and then return to the outdoor unit after being conditioned. The pipeline is provided with a cut-off device which can cut off the flow of the refrigerant in the pipeline. The air conditioning equipment also comprises a communication device which is electrically connected with the detection device of the space where the indoor unit is located so as to receive the concentration of the refrigerant obtained by the detection device. In addition, the communication device is also electrically connected with the cut-off device, and the cut-off device can be further controlled according to the concentration value of the refrigerant so as to adjust the opening of the valve body. The refrigerant leakage protection method includes the steps of firstly obtaining the refrigerant concentration of a space where one or more indoor units are located, and judging whether the indoor unit is in the room where the indoor unit is located and has refrigerant leakage or not. Obviously, if the refrigerant concentration is directly related to the refrigerant leakage, whether the refrigerant leaks or not and the severity of the refrigerant leakage can be directly judged according to the refrigerant concentration.

Furthermore, the refrigerant concentration comprises a plurality of concentration gears, and a first cutoff concentration range and a second cutoff concentration range can be determined according to the concentration gears so as to determine different preset recovery modes. It should be noted here that the length of operation and the number of alarms have an influence on the determination of the concentration range. When the operation duration of the detection device is prolonged, the detection sensitivity of the detection device is also changed correspondingly, so that the concentration gear should be correspondingly adjusted according to the operation duration of the detection device. Similarly, the alarm frequency that the opening of the valve port of the cutoff device is 0 is increased, which indicates that the air conditioning equipment has a high probability of refrigerant leakage, and therefore, the corresponding concentration gear should be correspondingly adjusted so as to alarm in time when the refrigerant leaks. Therefore, the corresponding concentration gear is determined according to the operation time and the alarm frequency, the refrigerant leakage risk of the air conditioning equipment can be better responded, and the safety of the air conditioning equipment is ensured.

Further, when the corresponding concentration gear is determined according to the operation time length and the alarm frequency, the first concentration gear is determined according to the operation time length, and the second concentration gear is determined according to the alarm frequency. The operation time length and the alarm times do not influence the determination of the first concentration gear and the second concentration gear. It should be noted that the longer the operation time, the higher the first concentration range, the more the number of alarms, and the higher the second concentration range. It will be appreciated that the longer the detection means is in operation, the poorer the sensitivity thereof, and therefore it is necessary to increase the first concentration range in order to cope with the reduced sensitivity of the detection means. Similarly, the more the number of times of alarm is, the greater the possibility of refrigerant leakage of the air conditioning equipment is, so that the second concentration shift needs to be increased, so as to control refrigerant leakage earlier and improve the safety of the air conditioning equipment.

And further, judging whether the first concentration gear is consistent with the second concentration gear. When the first concentration gear is consistent with the second concentration gear, obviously, the first cut-off concentration range and the second cut-off concentration range can be determined according to the first concentration gear or the second concentration gear due to the consistency of the first concentration gear and the second concentration gear, and the effects are the same; when the first concentration range and the second concentration range do not coincide with each other, the lower one of the first concentration range and the second concentration range should be used to determine the first cut-off concentration and the second cut-off concentration. Therefore, the first cutoff concentration range and the second cutoff concentration range can be set to be the most accurate ranges, and the refrigerant leakage can be accurately responded. It should be noted that the gear is positively correlated with the lower limit value of the first cut-off concentration range, because the lower limit value of the first cut-off concentration range corresponds to different preset recovery modes, the gear of the air conditioning system is positively correlated with the lower limit value of the first cut-off concentration range, and the preset recovery mode can be accurately set by setting the gear, so that the air conditioning system can more accurately cope with refrigerant leakage, and the safety of the air conditioning system is ensured.

EXAMPLE five

As shown in fig. 5, the air conditioning equipment 500 of the present embodiment includes an outdoor unit 502, a plurality of indoor units 504, a processor 518 and a memory 520. Each indoor unit 504 is connected with the outdoor unit 502 through a pipeline 506, a cut-off device 512 is arranged on the pipeline 506, and the corresponding pipeline 506 can be closed or restricted through the cut-off device 512 so as to adjust the flow rate of the pipeline 506; the processor 518 is electrically connected to the cut-off device 512 for controlling the cut-off device 512. The memory 520 stores programs or instructions, and the processor 518 is configured to implement the steps of the refrigerant leakage protection method when executing the programs or instructions, so that the air conditioning equipment 500 of the present invention has all the advantages of the refrigerant leakage protection method in any of the embodiments described above, and details thereof are not repeated herein.

EXAMPLE six

As shown in fig. 5, the present embodiment provides an air conditioning apparatus 500, which includes an outdoor unit 502, three indoor units 504, a processor 518 and a memory 520. Each indoor unit 504 is connected with the outdoor unit 502 through a pipeline 506, a cut-off device 512 is arranged on the pipeline 506, and the corresponding pipeline 506 can be closed or restricted through the cut-off device 512 so as to adjust the flow rate of the pipeline 506; the processor 518 is electrically connected to the cut-off device 512 for controlling the cut-off device 512. The memory 520 stores programs or instructions, and the processor 518 implements the steps of the refrigerant leakage protection method when executing the programs or instructions. Wherein conduit 506 includes a main conduit 508 and three branch conduits 510. In this embodiment, cutoff device 512 is provided on main conduit 508. Each indoor unit 504 is connected to a detection device 516 for detecting the indoor refrigerant concentration.

The refrigerant leakage protection method first obtains the refrigerant concentration of the space where one or more indoor units 504 are located, so as to determine whether there is refrigerant leakage in the room where the indoor unit 504 is located. Obviously, if the refrigerant concentration is directly related to the refrigerant leakage, whether the refrigerant leaks or not and the severity of the refrigerant leakage can be directly judged according to the refrigerant concentration. On the basis, the opening degree of the valve port of the cut-off device 512 and the operation parameters of the outdoor unit 502 are determined according to the refrigerant concentration. Here, the valve opening degree of the blocking device 512 is the valve opening degree of the blocking device 512 of the pipe line 506 connecting the indoor unit 504 and the outdoor unit 502. The opening of the valve port is adjusted, so that the flow of the refrigerant passing through the pipeline 506 can be adjusted. It can be understood that the smaller the opening degree of the valve port is, the smaller the flow rate of the refrigerant entering the pipe line 506 from the outdoor unit 502 is. Reducing the opening of the valve port can reduce the flow rate of the refrigerant flowing into the pipeline 506, thereby limiting further leakage of the refrigerant. Meanwhile, according to the refrigerant concentration, the operation parameters of the outdoor unit 502 are also set to match the adjustment of the opening degree of the valve port. The operation parameters of the outdoor unit 502 are parameters for controlling the operation state of the outdoor unit 502, and the operation state of the outdoor unit 502 can be changed by adjusting the operation parameters, so that the refrigerant in the pipeline 506 returns to the outdoor unit 502 as fast as possible. It can be understood that, by setting the opening degree of the valve port and the operation parameters, the operation of the cut-off device 512 and the outdoor unit 502 is controlled, on one hand, the inflow of the refrigerant of the outdoor unit 502 into the room is weakened to prevent the refrigerant of the outdoor unit 502 from further leaking into the room, and meanwhile, the operation state of the outdoor unit 502 is changed by the operation parameters, so that the backflow of the refrigerant in the pipeline 506 to the outdoor unit 502 can be accelerated, and finally, the concentration of the refrigerant in the room is reduced, and finally, a safe concentration range is achieved. Thus, the opening degree of the valve port of the cut-off device 512 and the operation parameters of the outdoor unit 502 are determined according to the refrigerant concentration, further leakage of the refrigerant can be effectively limited, the refrigerant in the pipeline 506 is recovered to the outdoor unit 502, the indoor refrigerant concentration is reduced, the safety risk caused by refrigerant leakage is eliminated in time, and the use safety of the combustible refrigerant air conditioning equipment 500 is improved.

Further, the cutoff device 512 is provided in the main line group, and it is understood that the cutoff device 512 provided in the main line group can adjust the flow rate of the refrigerant of the main line 508 in the main line group. Since the main pipe 508 is connected to the branch pipe group, the flow rate of the refrigerant in the main pipe 508 of the cut-off device 512 is adjusted, and the flow rate of the branch pipe group connected thereto is also adjusted.

Furthermore, the refrigerant concentration comprises a plurality of concentration gears, and a first cutoff concentration range and a second cutoff concentration range can be determined according to the concentration gears so as to determine different preset recovery modes. It should be noted here that the length of operation and the number of alarms have an influence on the determination of the concentration range. After the operation time of the detection device 516 is prolonged, the detection sensitivity of the detection device 516 is also changed correspondingly, so that the concentration gear should be adjusted correspondingly according to the operation time of the detection device 516. Similarly, the number of alarms when the valve port opening of the cutoff device 512 is 0 is increased, which indicates that the air conditioning equipment 500 has a high probability of refrigerant leakage, and therefore, the corresponding concentration gear should be correspondingly adjusted to alarm in time when the refrigerant leaks. Therefore, the corresponding concentration gear is determined according to the operation duration and the alarm frequency, so that the refrigerant leakage risk of the air conditioning equipment 500 can be better dealt with, and the safety of the air conditioning equipment 500 is ensured.

Further, when the corresponding concentration gear is determined according to the operation time length and the alarm frequency, the first concentration gear is determined according to the operation time length, and the second concentration gear is determined according to the alarm frequency. The operation time length and the alarm times do not influence the determination of the first concentration gear and the second concentration gear. It should be noted that the longer the operation time, the higher the first concentration range, the more the number of alarms, and the higher the second concentration range. It will be appreciated that the longer the time the sensing device 516 is operating, the less sensitive it will be, and therefore it is necessary to increase the first concentration range to account for the reduced sensitivity of the sensing device 516. Similarly, the more the number of alarms is, the more the possibility of refrigerant leakage of the air conditioning equipment 500 is, so the second concentration shift needs to be increased to control refrigerant leakage earlier and improve the safety of the air conditioning equipment 500.

And further, judging whether the first concentration gear is consistent with the second concentration gear. When the first concentration gear is consistent with the second concentration gear, obviously, the first cut-off concentration range and the second cut-off concentration range can be determined according to the first concentration gear or the second concentration gear due to the consistency of the first concentration gear and the second concentration gear, and the effects are the same; when the first concentration range and the second concentration range do not coincide with each other, the lower one of the first concentration range and the second concentration range should be used to determine the first cut-off concentration and the second cut-off concentration. Therefore, the first cutoff concentration range and the second cutoff concentration range can be set to be the most accurate ranges, and the refrigerant leakage can be accurately responded. It should be noted that the gear is positively correlated with the lower limit value of the first cut-off concentration range, because the lower limit value of the first cut-off concentration range corresponds to different preset recovery modes, and therefore, the device gear is positively correlated with the lower limit value of the first cut-off concentration range, and the preset recovery mode can be accurately set by setting the gear, so that the air conditioning device 500 can more accurately cope with refrigerant leakage, and the safety of the air conditioning device 500 is ensured.

EXAMPLE seven

As shown in fig. 6, the present embodiment provides an air conditioning apparatus 500, which includes an outdoor unit 502, three indoor units 504, a processor 518 and a memory 520. Each indoor unit 504 is connected with the outdoor unit 502 through a pipeline 506, a cut-off device 512 is arranged on the pipeline 506, and the corresponding pipeline 506 can be closed or restricted through the cut-off device 512 so as to adjust the flow rate of the pipeline 506; the processor 518 is electrically connected to the cut-off device 512 for controlling the cut-off device 512. The memory 520 stores programs or instructions, and the processor 518 implements the steps of the refrigerant leakage protection method when executing the programs or instructions. Wherein conduit 506 includes a main conduit 508 and three branch conduits 510. In this embodiment, the cut-off device 512 is disposed on the branch pipe 510. Each indoor unit 504 is connected to a detection device 516 for detecting the indoor refrigerant concentration.

Further, the cutoff device 512 is disposed on the branch line group, and it is understood that the cutoff device 512 disposed on the branch line group can adjust the flow rate of the refrigerant of the main line 508 in the main line group. The branch line group is also provided with a cutoff device 512, and the cutoff device 512 provided in the branch line group may be provided in a single branch line 510 to adjust the flow rate of the refrigerant in the branch line 510. It can be understood that the cut-off device 512 on a single branch pipe 510 only controls the refrigerant flow rate of the indoor unit 504, and does not affect the normal use of other indoor units 504.

Example eight

As shown in fig. 7, the present embodiment provides an air conditioning apparatus 500, which includes an outdoor unit 502 and three indoor units 504, a processor 518 and a memory 520. Each indoor unit 504 is connected with the outdoor unit 502 through a pipeline 506, a cut-off device 512 is arranged on the pipeline 506, and the corresponding pipeline 506 can be closed or restricted through the cut-off device 512 so as to adjust the flow rate of the pipeline 506; the processor 518 is electrically connected to the cut-off device 512 for controlling the cut-off device 512. The memory 520 stores programs or instructions, and the processor 518 implements the steps of the refrigerant leakage protection method when executing the programs or instructions. Wherein conduit 506 includes a main conduit 508 and three branch conduits 510. In this embodiment, each of the main pipe 508 and the branch pipe 510 is provided with a cut-off device 512. Each indoor unit 504 is connected to a detection device 516 for detecting the indoor refrigerant concentration.

Further, the cutoff device 512 is further disposed on the branch line group, and it can be understood that the cutoff device 512 disposed on the branch line group can adjust the flow rate of the refrigerant of the main line 508 in the main line group. The branch line group is also provided with a cutoff device 512, and the cutoff device 512 provided in the branch line group may be provided in a single branch line 510 to adjust the flow rate of the refrigerant in the branch line 510. It can be understood that the cut-off device 512 on a single branch pipe 510 only controls the refrigerant flow rate of the indoor unit 504, and does not affect the normal use of other indoor units 504.

The main pipeline 508 and the branch pipelines 510 are both provided with cut-off devices 512, and different cut-off devices 512 can be set according to the leakage condition of the practical limited refrigerant and targeted selection, so as to timely process the leakage of the refrigerant.

More specifically, as shown in fig. 8, a control method of a plurality of gear settings is provided, and the warning gear of the present embodiment is classified into 5 gears.

B0 is a basic operation duration of the refrigerant detection device for changing the alarm concentration gear, for example, 1 year. When the operating time of the refrigerant detection device reaches B0+ g, the gear of the alarm concentration is changed from M gear to L gear to solve the problem of sensitivity reduction of the refrigerant detection device. Then, when the operation time of the refrigerant detection device reaches B0+ e, the gear of the alarm concentration is changed from L gear to K gear.

A0 is the basic alarm frequency of the change of the alarm concentration gear of the refrigerant detection device, for example, 3 times. When the alarm frequency of the refrigerant detection device reaches A0+ h, the gear of the alarm concentration is changed from M gear to L gear to solve the problem of sensitivity reduction of the refrigerant detection device. Then, when the operation time of the refrigerant detection device reaches A0+ f, the gear of the alarm concentration is changed from L gear to K gear.

And when the target alarm gear obtained by changing the operation time length and the alarm frequency is inconsistent, taking a lower alarm gear as the target alarm gear.

Example nine

The present embodiment provides an embodiment of a computer-readable storage medium, in which a computer program is stored, and when the computer program is executed by a processor, the steps of the refrigerant leakage protection method in any of the embodiments are implemented, so that all beneficial effects of the refrigerant leakage protection method in any of the embodiments are achieved, and details are not repeated herein.

According to the refrigerant leakage protection method and the air conditioning equipment provided by the invention, the valve port opening of the cutoff device and the operation parameters of the outdoor unit are determined according to the refrigerant concentration, further leakage of the refrigerant can be effectively limited, the refrigerant in the pipeline is recycled to the outdoor unit, the indoor refrigerant concentration is reduced, the safety risk caused by refrigerant leakage is eliminated in time, and the use safety of the combustible refrigerant air conditioning equipment is improved.

In the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or unit must have a specific direction, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A refrigerant leakage protection method is characterized by being used for air conditioning equipment, wherein the air conditioning equipment comprises an outdoor unit and a plurality of indoor units connected with the outdoor unit through pipelines, the pipelines are provided with cut-off devices, and the refrigerant leakage protection method comprises the following steps:

obtaining the refrigerant concentration of a space where at least one indoor unit is located;

determining the opening degree of a valve port of the cut-off device and the operation parameters of the outdoor unit according to the concentration of the refrigerant;

and controlling the operation of the cut-off device and the outdoor unit according to the opening degree of the valve port and the operation parameters so as to recycle the refrigerant in the pipeline to a pipe section connected with an exhaust port of a compressor in the outdoor unit.

2. The refrigerant leakage protection method as claimed in claim 1, wherein the pipeline includes a main pipeline group and a plurality of branch pipeline groups communicated with the main pipeline group,

wherein, the cut-off device is arranged on the main pipeline group and/or at least one branch pipeline group.

3. The refrigerant leakage protection method according to claim 2, wherein the cutoff device is disposed on the main pipe group, and the determining of the opening degree of the valve port of the cutoff device and the operation parameter of the outdoor unit according to the refrigerant concentration specifically includes:

when the concentration of the refrigerant is in a first cutoff concentration range, determining a first opening and a first parameter according to a preset recovery mode;

controlling the cut-off device to operate according to the first opening degree, controlling a compressor of the outdoor unit to operate according to a first frequency of the first parameter, and controlling a fan of the outdoor unit to operate according to a first wind speed of the first parameter;

acquiring the pipeline pressure of a pipeline connecting each indoor unit in the air conditioning equipment with an air suction port of the compressor;

and when the pipeline pressure is smaller than a first pressure threshold value, controlling the opening degree of a valve port of the cut-off device to be 0.

4. The refrigerant leakage protection method according to claim 3, wherein the determining of the opening degree of the valve port of the cutoff device and the operation parameter of the outdoor unit according to the refrigerant concentration specifically includes:

when the concentration of the refrigerant is in a second cutoff concentration range, determining a second frequency and a second air speed;

controlling a compressor of the outdoor unit to operate according to the second frequency, and controlling a fan of the outdoor unit to operate according to the second wind speed;

controlling a valve port of the cut-off device to be reduced to a second opening degree, and acquiring the concentration of the refrigerant within the reexamination time;

if the concentration of the refrigerant is smaller than the lower limit value of the second cutoff concentration range, controlling the valve port to be fully opened, and controlling the compressor and the fan to operate according to a normal heat exchange mode;

if the concentration of the refrigerant is in the first cutoff range, controlling the operation of the air conditioning equipment according to a preset recovery mode,

wherein a lower limit value of the first cutoff concentration range is greater than an upper limit value of the second cutoff concentration range.

5. The refrigerant leakage protection method according to claim 3, wherein the main pipeline group includes a plurality of main pipelines, the cutoff device includes a plurality of valve bodies respectively disposed on the plurality of main pipelines, and when the pipeline pressure is smaller than a first pressure threshold, the method specifically includes:

and when the pipeline pressure is smaller than a first pressure threshold value, controlling the opening degree of a valve body arranged on the pipeline with the minimum pipeline pressure in the pipelines to be 0.

6. The refrigerant leakage protection method as claimed in claim 5,

the main pipeline group comprises two main pipelines, and the cut-off device comprises two valve bodies; or

The main pipeline group comprises three main pipelines, the cut-off device comprises three valve bodies,

wherein each valve body is arranged on one main pipeline.

7. The refrigerant leakage protection method as claimed in claim 3, further comprising:

and if the refrigerant concentration is within the first cutoff range, sending alarm information to a target terminal.

8. The refrigerant leakage protection method according to any one of claims 4 to 7, wherein the air conditioning equipment further includes a communication device electrically connected to the cutoff device, and the acquiring the refrigerant concentration of the space where the at least one indoor unit is located specifically includes:

controlling the communication device to be electrically connected with a detection device in a space where at least one indoor unit is located;

and receiving the refrigerant concentration acquired by the detection device through the communication device.

9. The refrigerant leakage protection method according to claim 8, wherein the refrigerant concentration includes a plurality of concentration ranges, and before the determining of the opening degree of the valve port of the cutoff device and the operation parameter of the outdoor unit according to the refrigerant concentration, the method further comprises:

acquiring the operation duration of the detection device and controlling the alarm times that the opening degree of a valve port of the cut-off device is 0 within the operation duration;

determining a corresponding concentration gear according to the operation duration and the alarm times;

determining a first cutoff concentration range and/or a second cutoff concentration range according to the concentration gear;

the determining of the opening degree of the valve port of the cutoff device and the operation parameters of the outdoor unit according to the refrigerant concentration specifically includes:

and determining the opening degree of a valve port of the cutoff device and the operation parameters of the outdoor unit according to the refrigerant concentration and a first cutoff concentration range and/or a second cutoff concentration range corresponding to the concentration gear.

10. The refrigerant leakage protection method according to claim 9, wherein the determining a corresponding concentration shift according to the operation duration and the number of times of the alarm specifically includes:

determining a first concentration gear corresponding to the operation time length;

determining a second concentration gear corresponding to the alarm times;

judging whether the first concentration gear is consistent with the second concentration gear, and generating a judgment result;

the determining the first cut-off concentration range and/or the second cut-off concentration range according to the concentration range specifically includes:

determining a first cut-off concentration range and/or the second cut-off concentration range according to the judgment result,

the longer the operation time is, the higher the first concentration gear is, the more the alarm times are, and the higher the second concentration gear is.

11. The refrigerant leakage protection method according to claim 10, wherein the determining the first cutoff concentration range and/or the second cutoff concentration range according to the determination result specifically includes:

when the judgment result is yes, determining the first cut-off concentration range and/or the second cut-off concentration range according to the first concentration range or the second concentration range;

when the judgment result is negative, determining a first cut-off concentration range and/or a second cut-off concentration range according to the lower gear of the first concentration gear and the second concentration gear,

wherein the gear is positively correlated with the lower limit of the first cutoff concentration range.

12. An air conditioning apparatus, characterized by comprising:

an outdoor unit;

each indoor unit is connected with the outdoor unit through a pipeline, and a cut-off device is arranged on the pipeline;

a processor electrically connected to the cut-off device, and a memory in which a program or instructions are stored, wherein the processor is configured to implement the steps of the refrigerant leakage protection method according to any one of claims 1 to 11 when the program or instructions are executed.

13. A readable storage medium, on which a program or instructions are stored, wherein the program or instructions, when executed by a processor, implement the steps of the refrigerant leakage protection method according to any one of claims 1 to 11.