Refrigerant leakage detection method, device, equipment, air conditioner and storage medium

Abstract

The application relates to a refrigerant leakage detection method, device, equipment, air conditioner and storage medium. The method comprises the following steps: after receiving a refrigerant sensor alarm signal for the first time, performing closed control on a ducted air conditioner; determining the refrigerant leakage state of the ducted air conditioner by performing false alarm detection on the refrigerant sensor; if it is determined that the refrigerant leakage state is not leaked, performing air supply control on the ducted air conditioner; and if it is determined that the refrigerant leakage state is leaked, controlling the outdoor unit to perform a refrigerant recovery task. After receiving the alarm signal for the first time, the ducted air conditioner becomes a closed space, the detection accuracy of the refrigerant sensor is improved, and the refrigerant is prevented from leaking to the external environment. Whether the refrigerant sensor has false alarm is identified. According to whether the refrigerant sensor has false alarm, whether the refrigerant leaks can be determined, and corresponding measures can be taken, thereby avoiding the problem that refrigerant recovery needs to be blindly performed every time an alarm message is received.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioners, and in particular to a refrigerant leakage detection method, device, equipment, air conditioner and storage medium. BACKGROUND

[0002] Environment-friendly refrigerants have attracted more and more attention, and therefore more environmentally friendly flammable refrigerants have entered the refrigeration industry. Although the environmental friendliness of flammable refrigerants meets the global market's requirements for environmental protection, because the refrigerant is flammable, the refrigeration equipment using the flammable refrigerant has a safety hazard. In order to avoid the safety hazard, how to quickly detect the leakage of the flammable refrigerant has become a problem of concern in the refrigeration industry.

[0003] In order to solve this problem, the technical personnel install a refrigerant sensor in the ducted air conditioner, use the refrigerant sensor to detect the concentration of flammable refrigerant in the air in the ducted air conditioner, and when the refrigerant sensor detects that the concentration of flammable refrigerant is greater than a preset concentration threshold, an alarm message of refrigerant leakage is sent. After receiving the refrigerant leakage alarm message, the flammable refrigerant in the ducted air conditioner is recovered and the leakage point is manually detected and repaired.

[0004] However, the refrigerant sensor may have a false alarm problem due to failure or failure during detection of the concentration of flammable refrigerant. However, there is currently no refrigerant leakage detection method that can deal with the false alarm problem of the refrigerant sensor, so the refrigerant can only be recovered once after receiving a refrigerant leakage alarm message. If the refrigerant sensor frequently has a false alarm problem, the refrigerant will be frequently recovered, which will result in poor stability of the ducted air conditioner. If the problem of frequent recovery of the refrigerant is to be avoided, manual detection can be performed before the refrigerant is recovered to determine whether refrigerant leakage has occurred. However, since manual detection takes a long time, when refrigerant leakage actually occurs, the refrigerant will not be recovered in time, and a large amount of flammable refrigerant will accumulate in the ducted air conditioner. When the leakage amount is large, the leaked flammable refrigerant may even flow into the external environment, causing a large safety hazard. SUMMARY

[0005] The present application provides a refrigerant leakage detection method, device, equipment, air conditioner and storage medium to solve the problem that there is currently no refrigerant leakage detection method that can deal with the false alarm problem of the refrigerant sensor, and the flammable refrigerant is recovered each time a refrigerant leakage alarm message is received.

[0006] To solve the above technical problems, the technical solution of the present application is as follows:

[0007] The embodiment of the present application provides a refrigerant leakage detection method, comprising: performing closed control on a ducted air conditioner after first receiving an alarm signal of a refrigerant sensor; determining a refrigerant leakage state corresponding to the ducted air conditioner by performing false alarm detection on the refrigerant sensor; if the refrigerant leakage state is non-leakage, performing air supply control on the ducted air conditioner; if the refrigerant leakage state is leakage, controlling an outdoor unit to recover refrigerant.

[0008] The false alarm detection result corresponding to the refrigerant sensor is determined according to the alarm reset state of the refrigerant sensor; if the false alarm detection result is false alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as non-leakage; if the false alarm detection result is normal alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as leakage.

[0009] The false alarm detection result corresponding to the refrigerant sensor is determined according to the alarm reset state of the refrigerant sensor; if the false alarm detection result is false alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as non-leakage; if the false alarm detection result is normal alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as leakage.

[0010] The false alarm detection result corresponding to the refrigerant sensor is determined according to the alarm reset state of the refrigerant sensor; if the false alarm detection result is false alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as non-leakage; if the false alarm detection result is normal alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as leakage.

[0011] The false alarm detection result corresponding to the refrigerant sensor is determined according to the alarm reset state of the refrigerant sensor; if the false alarm detection result is false alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as non-leakage; if the false alarm detection result is normal alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as leakage.

[0012] The false alarm detection result corresponding to the refrigerant sensor is determined according to the alarm reset state of the refrigerant sensor; if the false alarm detection result is false alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as non-leakage; if the false alarm detection result is normal alarm, the refrigerant leakage state corresponding to the ducted air conditioner is determined as leakage.

[0013] The control of the outdoor unit to recover refrigerant further includes: sending a preset refrigerant leakage checking message; and / or opening an exhaust device in the ducted air conditioner.

[0014] The application further provides a refrigerant leakage detection device, which comprises: a closing module configured to perform airtight control on the ducted air conditioner after receiving an alarm signal of a refrigerant sensor for the first time; a detection module configured to determine a refrigerant leakage state by performing false alarm detection on the refrigerant sensor; a starting module configured to perform air supply control on the ducted air conditioner if the determination module determines that the refrigerant leakage state is not leaked; and a control module configured to control an outdoor unit to recover refrigerant if the determination module determines that the refrigerant leakage state is leaked.

[0015] The application further provides a refrigerant leakage detection device, which comprises: at least one communication interface; at least one bus connected to the at least one communication interface; at least one processor connected to the at least one bus; and at least one memory connected to the at least one bus, wherein the processor is configured to execute a refrigerant leakage detection program stored in the memory to implement any of the above refrigerant leakage detection methods.

[0016] The application further provides an air conditioning device, which comprises the above refrigerant leakage detection device.

[0017] The application further provides a computer readable storage medium, which stores computer executable instructions, and the computer executable instructions are executed to implement any of the above refrigerant leakage detection methods.

[0018] Compared with the prior art, the above technical solution provided by the application has the following advantages: the method provided by the application can perform airtight control on the ducted air conditioner after receiving an alarm signal of a refrigerant sensor for the first time; the refrigerant leakage state of the ducted air conditioner is determined by performing false alarm detection on the refrigerant sensor; if it is determined that the refrigerant leakage state is not leaked, air supply control is performed on the ducted air conditioner; and if it is determined that the refrigerant leakage state is leaked, the outdoor unit is controlled to perform a refrigerant recovery task. After receiving an alarm signal for the first time, the application makes the duct become an airtight space, increases the detection accuracy of the refrigerant sensor, and avoids refrigerant leakage to the external environment. Then, whether the refrigerant sensor has false alarm is identified. According to whether the refrigerant sensor has false alarm, it can be determined whether the refrigerant is leaked and corresponding measures are taken. The application can more accurately determine whether the refrigerant is leaked by detecting whether the refrigerant sensor has false alarm, and avoids the problem that refrigerant recovery is blindly performed every time an alarm message is received. BRIEF DESCRIPTION OF DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings required to be used in the embodiments or prior art description will be briefly introduced below. Obviously, for those skilled in the field, other drawings can also be obtained from these drawings without any creative labor.

[0021] One or more embodiments are illustrated by the pictures in the drawings corresponding thereto, which do not constitute a limitation on the embodiments, and elements with the same reference numerals in the drawings represent similar elements, unless otherwise specified. The drawings in the drawings do not constitute a proportional limitation.

[0022] Figure 1 Structure diagram of a ducted air conditioner according to an embodiment of the present application;

[0023] Figure 2 Flowchart of a refrigerant leakage detection method according to an embodiment of the present application;

[0024] Figure 3 Flowchart of a step of determining a refrigerant leakage state according to an embodiment of the present application;

[0025] Figure 4 Schematic diagram of a refrigerant leakage detection method according to an embodiment of the present application;

[0026] Figure 5 Structure diagram of a refrigerant leakage detection device according to an embodiment of the present application;

[0027] Figure 6 Structure diagram of a refrigerant leakage detection device according to an embodiment of the present application. DETAILED DESCRIPTION

[0028] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative labor fall within the scope of protection of the present application.

[0029] The following disclosure provides numerous different embodiments or examples for implementing various structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0030] This application provides a ducted air conditioner that facilitates refrigerant leak detection. This ducted air conditioner can be used as the indoor unit of a refrigeration system (such as an air conditioner), meaning it is connected to the outdoor unit.

[0031] like Figure 1 The diagram shown is a structural schematic of a ductwork unit according to an embodiment of this application.

[0032] This ducted air conditioning unit includes: a control device, air ducts, condenser pipes, exhaust pipes, air supply system, air exhaust system, and a refrigerant sensor. The air ducts, refrigerant pipes, and refrigerant sensor are located inside the main body of the air conditioning unit. Figure 1 It was not shown in the text.

[0033] The air supply device includes: a fan installed at one end of the duct, and inlet and outlet air valves installed at both ends of the duct. The fan generates airflow and directs it into the duct. The inlet and outlet air valves are used to open or close the airflow within the duct.

[0034] The exhaust system includes an exhaust damper and an exhaust fan installed in the exhaust duct. One end of the exhaust duct is connected to the duct body of the ventilation system, and the other end is connected to the outdoor environment. The exhaust damper is used to disconnect or open the passage between the ventilation duct and the exhaust duct. The exhaust fan is used to direct airflow from the ventilation duct to the exhaust duct. To facilitate viewing the location of the exhaust damper, [details omitted]. Figure 1 The exhaust duct and exhaust fan were not shown in the image.

[0035] In this embodiment, the structure of the air inlet valve, air supply valve, and air outlet valve is not limited. For example, the air inlet valve, air supply valve, and air outlet valve may have a louvered structure.

[0036] The control device is used to control the fan, inlet air valve, supply air valve, exhaust air valve, exhaust fan, and refrigerant sensor. Furthermore, the control device can wirelessly control the fan, inlet air valve, supply air valve, exhaust air valve, exhaust fan, and refrigerant sensor.

[0037] Refrigerant pipes are used to carry refrigerant and allow it to circulate within the ducted air conditioner. Since refrigerant pipes are located inside the ductwork, a refrigerant leak will cause the refrigerant concentration inside the ductwork to increase.

[0038] The refrigerant sensor is arranged in the air duct and used to detect the refrigerant concentration in the air duct.

[0039] Specifically, the control device starts the refrigerant sensor, controls the inlet air damper and the outlet air damper to open, and controls the fan to start. The air flow generated by the fan enters the air duct from the inlet air damper, and the air flow in the air duct is discharged from the outlet air damper. At this time, the exhaust fan is closed, and the air flow cannot enter the exhaust duct. The refrigerant sensor detects the refrigerant concentration in the air duct. When the refrigerant concentration is greater than the preset concentration threshold, an alarm signal is sent. When the refrigerant concentration is less than or equal to the concentration threshold, the refrigerant sensor is reset and continues to detect the refrigerant concentration in the air duct. When the refrigerant concentration is greater than the preset concentration threshold, it indicates that there is a suspected refrigerant leakage.

[0040] Generally, after receiving the alarm signal sent by the refrigerant sensor, the control device can control the outdoor unit connected to the ducted air conditioner to recover the refrigerant in the ducted air conditioner to the outdoor unit, so as to avoid the leaked refrigerant in the ducted air conditioner flowing into the place where the ducted air conditioner is located, thereby causing safety problems. However, since the refrigerant sensor has a false alarm problem, the present application provides a refrigerant leakage detection method capable of identifying the false alarm problem of the refrigerant sensor. After receiving the alarm signal sent by the refrigerant sensor, the control device controls the fan, the inlet air damper, the outlet air damper, the exhaust air damper, and the exhaust fan.

[0041] The refrigerant leakage detection method provided in the present application will be described below. The execution subject of the present application is the control device described above. As shown in FIG. 1, it is a flowchart of the refrigerant leakage detection method according to an embodiment of the present application. Figure 2

[0042] Step S210: After receiving the alarm signal of the refrigerant sensor for the first time, the ducted air conditioner is subjected to airtight control.

[0043] The refrigerant sensor is arranged in the air duct and used to detect the refrigerant concentration in the air duct.

[0044] The alarm signal of the refrigerant sensor refers to the alarm signal sent by the refrigerant sensor when the refrigerant concentration in the gas is greater than the preset concentration threshold. When the refrigerant concentration in the air duct is greater than the concentration threshold, it can be determined that there is a suspected refrigerant leakage.

[0045] The alarm signal of the refrigerant sensor received for the first time refers to the alarm signal of the refrigerant sensor received for the first time after it is determined that the ducted air conditioner does not have a refrigerant leakage.

[0046] For example: the alarm signal of the refrigerant sensor is received for the first time after the air conditioner is shipped.

[0047] ​For example, after a refrigerant leakage, the leakage point is located manually and the maintenance is completed, and then the alarm signal of the refrigerant sensor is continued to be received, and after the alarm signal of the refrigerant sensor is received again, the alarm signal is determined as the alarm signal of the refrigerant sensor received for the first time.

[0048] The closed control of the duct type air conditioner refers to adjusting the inside of the duct type air conditioner to a closed space by controlling components of the duct type air conditioner. Further, the air supply device of the duct type air conditioner can be closed. Of course, other components can also be provided in the duct type air conditioner, and the inside of the duct type air conditioner is adjusted to a closed space by controlling the components.

[0049] Specifically, after the duct type air conditioner is started, the inlet air valve and the air supply valve are opened, the fan is started, and the exhaust air valve and the exhaust fan are closed. After the alarm signal of the refrigerant sensor is received for the first time, the air supply device of the duct type air conditioner is closed, that is, the fan, the inlet air valve and the air supply valve are closed, and since the exhaust air fan and the exhaust fan are not opened, a closed space can be formed in the inside of the duct. In the closed space, air flow is not generated, and the spread of the leaked refrigerant to the outside space can also be prevented, which not only increases the safety, but also makes the detection result of the refrigerant sensor more accurate.

[0050] Step S220, determining the refrigerant leakage state corresponding to the duct type air conditioner by performing false alarm detection on the refrigerant sensor.

[0051] The false alarm detection is used to determine whether the refrigerant sensor has a false alarm behavior.

[0052] The types of the refrigerant leakage state include but are not limited to: no leakage and leakage. The no leakage means that the refrigerant has not leaked. The leakage means that the refrigerant has leaked.

[0053] In the embodiments of the present application, whether the refrigerant sensor has a false alarm can be determined according to the alarm reset state of the refrigerant sensor, and then the refrigerant leakage state is determined.

[0054] The alarm reset state refers to the state whether the refrigerant sensor can be reset after sending the alarm signal. Further, in the case of false alarm, the refrigerant sensor can be reset and continue to detect the refrigerant concentration in the duct when the refrigerant concentration is less than or equal to the concentration threshold.

[0055] Step S230, determining whether the refrigerant leakage state is no leakage; if yes, step S240 is performed; if no, step S250 is performed.

[0056] Step S240, if the refrigerant leakage state is no leakage, performing air supply control on the duct type air conditioner.

[0057] The air supply control of the duct type air conditioner refers to releasing the closed space of the duct type air conditioner by controlling part of the duct type air conditioner, so that the duct type air conditioner works normally. Further, the air supply device can be restarted.

[0058] If it is determined that the refrigerant leakage state is not leaked, it means that the refrigerant is not leaked, and at this time, the air supply device can be restarted, so that the duct type air conditioner continues to work normally.

[0059] In step S250, if the refrigerant leakage state is leaked, the outdoor unit is controlled to recover the refrigerant.

[0060] The refrigerant recovery refers to the outdoor unit recovering the refrigerant in the duct type air conditioner into the outdoor unit.

[0061] If it is determined that the refrigerant leakage state is leaked, it means that the refrigerant has been leaked, and at this time, the outdoor unit needs to be controlled to perform the refrigerant recovery task to recover the refrigerant in the duct type air conditioner, so as to avoid the safety hazard caused by the continuous leakage of the refrigerant into the duct. Further, the control device can send a refrigerant recovery instruction to the outdoor unit, and after receiving the refrigerant recovery instruction, the outdoor unit performs the refrigerant recovery task to recover the refrigerant in the duct type air conditioner into the outdoor unit.

[0062] If it is determined that the refrigerant leakage state is leaked, in addition to controlling the outdoor unit to perform the refrigerant recovery task, it also includes: sending a preset refrigerant leakage troubleshooting message; and / or opening the exhaust device in the duct type air conditioner.

[0063] Further, the refrigerant leakage troubleshooting message is used to prompt that the duct type air conditioner has a refrigerant leakage problem. The refrigerant leakage troubleshooting message can be sent to a preset client. The client can be installed in a personal terminal of a user, or installed in a terminal device of a running and maintenance center. For example, the client is installed in a running and maintenance management terminal of a building. In this way, after the user sees the refrigerant leakage troubleshooting message, the user can check and repair the leakage point in the duct type air conditioner as soon as possible.

[0064] Further, opening the exhaust device in the duct type air conditioner without opening the air supply device can make the gas containing flammable refrigerant in the duct be discharged from the exhaust duct to the outdoor environment, reduce the concentration of the refrigerant in the duct, and improve the safety of the duct type air conditioner and the place where the duct type air conditioner is located.

[0065] In this embodiment, upon receiving the first refrigerant sensor alarm signal, the ducted air conditioner is controlled to be sealed. False alarm detection is performed on the refrigerant sensor to determine the refrigerant leakage status of the ducted air conditioner. If the refrigerant leakage status is determined to be no leakage, air supply control is performed on the ducted air conditioner. If the refrigerant leakage status is determined to be leaking, the outdoor unit is controlled to perform refrigerant recovery. This embodiment, upon receiving the first alarm signal, makes the duct a sealed space, increasing the detection accuracy of the refrigerant sensor and preventing refrigerant leakage to the external environment. It then identifies whether the refrigerant sensor is issuing false alarms. Based on the presence of false alarms, it can determine whether a refrigerant leak has occurred and implement corresponding countermeasures. This embodiment, by detecting false alarms from the refrigerant sensor, can more accurately determine whether a refrigerant leak has occurred, avoiding the problem of blindly performing refrigerant recovery every time an alarm message is received.

[0066] The following describes how to determine the refrigerant leak status.

[0067] like Figure 3 The diagram shown is a flowchart illustrating the steps for determining a refrigerant leakage state according to an embodiment of this application.

[0068] Step S310: Detect the alarm reset status of the refrigerant sensor.

[0069] Alarm reset status refers to whether the refrigerant sensor resets normally after issuing an alarm signal.

[0070] The types of alarm reset status include: normal reset, abnormal reset, and unable to reset.

[0071] Normal reset means that after the refrigerant sensor issues an alarm signal, it resets and does not issue an alarm signal again within a preset time period.

[0072] Abnormal reset refers to the intermittent alarm and reset that occurs after the refrigerant sensor issues an alarm signal.

[0073] "Cannot be reset" means that after the refrigerant sensor sends an alarm signal, it keeps sending alarm signals again and cannot be reset.

[0074] Step S320: Determine the false alarm detection result corresponding to the refrigerant sensor based on the alarm reset status of the refrigerant sensor.

[0075] The types of false alarm detection results include: erroneous alarms and normal alarms.

[0076] A false alarm (i.e., a false alarm) is an alarm issued by the refrigerant sensor when it detects that the refrigerant concentration in the gas exceeds a concentration threshold under abnormal conditions. For example, an alarm issued when the refrigerant sensor malfunctions.

[0077] Normal alarm refers to an alarm issued by the refrigerant sensor when the refrigerant concentration in the gas detected by the refrigerant sensor under normal circumstances is greater than the concentration threshold.

[0078] In step S330, it is determined whether the false alarm detection result is a false alarm; if yes, step S340 is performed; if no, step S350 is performed.

[0079] In step S340, if the false alarm detection result is a false alarm, it is determined that the refrigerant leakage state corresponding to the ducted air conditioner is not leaked.

[0080] In step S350, if the false alarm detection result is a normal alarm, it is determined that the refrigerant leakage state corresponding to the ducted air conditioner is leaked.

[0081] The process of determining the false alarm detection result of the refrigerant sensor according to the alarm reset state of the refrigerant sensor is described in detail as follows.

[0082] During the normal operation of the ducted air conditioner, after receiving the alarm signal of the refrigerant sensor for the first time, the fan, the inlet air damper and the outlet air damper of the ducted air conditioner are immediately closed through linkage control, at this time the ducted air conditioner is a closed space, which can effectively exclude the false alarm behavior of the refrigerant sensor, and if the flammable refrigerant is determined to be leaked, the sealed environment can not only effectively detect the refrigerant concentration, but also effectively cut off the flammable refrigerant from entering the application site (such as indoor environment) through the air pipe, thereby improving the safety of the application site.

[0083] In one case, if it is detected that the refrigerant sensor is normally reset, it is determined that the false alarm detection result is a false alarm; if it is detected that the refrigerant sensor cannot be reset, it is determined that the false alarm detection result is a normal alarm.

[0084] Normal reset of the refrigerant sensor refers to that after the refrigerant sensor issues the first alarm signal, it can be reset within a preset time length and does not issue the alarm signal again. Further, after receiving the alarm signal of the refrigerant sensor, if no next alarm signal is received within a preset time length, it can be determined that the refrigerant sensor has been reset.

[0085] If the refrigerant sensor can be reset in the closed space, it can be determined that the received first alarm signal is a false alarm signal, at this time the outdoor unit does not need to perform the refrigerant recovery task, the inlet air damper and the outlet air damper are opened and the fan is started, and the operation mode before the first alarm can be restored.

[0086] If the refrigerant sensor still alarms in the closed space, it can be determined that the ducted air conditioner has a refrigerant leakage problem, and the outdoor unit needs to perform a refrigerant recovery measure. In order to reduce the concentration of refrigerant in the ducted air conditioner, the embodiment of the application can simultaneously open the exhaust air valve and the exhaust fan, so that the air containing flammable refrigerant can be discharged to the outdoor environment. The embodiment of the application can also send a refrigerant leakage troubleshooting message to check the leakage point of the ducted air conditioner and perform maintenance.

[0087] In another case, after first receiving the alarm signal of the refrigerant sensor, if it is detected that the refrigerant sensor abnormally resets within a preset first time period, the alarm reset state of the refrigerant sensor within a preset second time period is detected; wherein the second time period is a time period immediately after the first time period; if it is detected that the refrigerant sensor normally resets within the second time period, it is determined that the false alarm detection result is a false alarm; otherwise, it is determined that the false alarm detection result is a normal alarm.

[0088] The duration of the first time period and the duration of the second time period are both empirical values or values obtained through experiments. The time start point of the first time period is the time when the alarm signal of the refrigerant sensor is first received. The time start point of the second time period is the time end point of the first time period.

[0089] The abnormal reset of the refrigerant sensor refers to that if it is detected that the number of times of receiving the alarm signal of the refrigerant sensor within the first time period reaches a preset number threshold, it is determined that the refrigerant sensor abnormally resets within the first time period. In other words, abnormal reset refers to that the number of times of determining the refrigerant sensor as a false alarm within the first time period reaches the number threshold.

[0090] In the embodiment of the application, if the refrigerant sensor alarms within the first time period and is normal within the second time period, it can be indicated that the refrigerant sensor has failed and needs to be repaired or replaced by the maintenance personnel as soon as possible. Therefore, if it is detected that the refrigerant sensor normally resets within the second time period, it is determined that the refrigerant sensor has failed and a preset sensor fault troubleshooting message is sent. The sensor fault troubleshooting message is used to prompt that the refrigerant sensor has failed and needs to be modified. The sensor fault troubleshooting message can be sent to the above-mentioned client. So that the user can view the sensor fault troubleshooting message.

[0091] In the embodiment of the present application, in order to check whether the refrigerant sensor is faulty, after detecting that the refrigerant sensor is abnormally reset within a preset first time period, the outdoor unit is first controlled to recover refrigerant, and the alarm reset state of the refrigerant sensor within a preset second time period is detected; if it is detected that the refrigerant sensor is normally reset within the second time period, it is determined that the false alarm detection result is false alarm; otherwise, it is determined that the false alarm detection result is normal alarm.

[0092] For example, within 1 hour (the first time period) after first receiving the alarm signal of the refrigerant sensor, the number of intermittent alarms of the refrigerant sensor reaches 3 times (the number threshold), it is determined that the refrigerant sensor is abnormally reset, at this time, the outdoor unit is controlled to recover refrigerant, and the alarm reset state of the refrigerant sensor is continuously detected, for example, the detection time can last for 5 minutes (the second time period), if the refrigerant sensor is normally reset, it is determined that the false alarm detection result is false alarm and it is determined that the sensor is faulty; if the refrigerant sensor continues to alarm and is still not reset, it indicates that the ducted air conditioner has a refrigerant leakage point, and it can be determined that the false alarm detection result is normal alarm.

[0093] Before recovering refrigerant, the embodiment of the present application identifies whether the refrigerant sensor has a false alarm problem according to the reset state of the refrigerant sensor, if the refrigerant sensor does not have a false alarm problem, the outdoor unit is executed to recover refrigerant; if the refrigerant sensor has a false alarm problem, it can also be identified whether the refrigerant sensor is faulty, so as to troubleshoot as soon as possible. The embodiment of the present application enhances the safety and accuracy of the refrigerant sensor in detecting refrigerant leakage, and can ensure that the application site is always in a safe space, so as to achieve the state of simultaneous safety and energy saving, even if leakage occurs, it can be diagnosed in time whether to stop or alarm for repair, so as to ensure the operation stability of the ducted air conditioner and the entire refrigeration system as much as possible, through linkage control, the downtime is reduced as much as possible under the premise of use safety, so as to achieve the effect of safety and energy saving, and improve the use experience and economy of customers.

[0094] A more specific example is provided below to illustrate the refrigerant leakage detection method of the embodiment of the present application. As shown in Figure 4 FIG. 1 is a schematic diagram of a refrigerant leakage detection method according to an embodiment of the present application.

[0095] When the refrigeration system is normally operated, the fan in the air supply device is in a start state, the inlet air valve and the air supply valve are both in an open state, and the exhaust air valve and the exhaust fan are both in a closed state.

[0096] The control device receives the alarm signal of the refrigerant sensor for the first time, and immediately closes the fan, the inlet air damper and the outlet air damper of the ducted air conditioner through linkage control. At this time, the ducted air conditioner is a closed space. If there is a refrigerant leakage problem, the refrigerant concentration in the closed space will become larger and larger. Therefore, the closed space can effectively determine whether the refrigerant sensor is false alarm. In addition, when there is a refrigerant leakage problem, the sealed environment can effectively cut off the flammable refrigerant from entering the application site through the air duct, thereby improving the safety of the application site.

[0097] After the control device receives the alarm signal of the refrigerant sensor for the first time, the alarm reset state of the refrigerant sensor is monitored.

[0098] If the refrigerant sensor is normally reset in the closed space after the alarm, it is determined that the refrigerant sensor is false alarm. At this time, the outdoor unit does not need to perform the refrigerant recovery measure, and the inlet air damper and the outlet air damper are opened, the fan is started, and the ducted air conditioner is restored to the running mode before the refrigerant sensor alarm.

[0099] If the refrigerant sensor is still alarming (cannot be reset) in the closed space after the alarm, it is determined that the refrigerant sensor is normal alarm. At this time, the ducted air conditioner has a refrigerant leakage problem, and the outdoor unit needs to perform the refrigerant recovery measure. The exhaust air damper and the exhaust fan are opened at the same time, the air containing flammable refrigerant is discharged to the outdoor environment, and a refrigerant leakage troubleshooting message is sent to the client, so as to alarm the operation and maintenance personnel to check the leakage point of the ducted air conditioner.

[0100] If the refrigerant sensor is intermittently alarming (abnormal reset) in the closed space after the alarm, for example, it is continuously determined as false alarm in the first time period and the number of times has reached the number threshold. At this time, the outdoor unit is controlled to recover the refrigerant in the ducted air conditioner, and the alarm reset device of the refrigerant sensor can be detected for a longer time to determine whether the refrigerant sensor continues to alarm in the second time period. If the refrigerant sensor continues to alarm in the second time period and fails to reset normally, it is determined that there is a leakage point in the ducted air conditioner. A refrigerant leakage troubleshooting message is sent to the client, so as to alarm the operation and maintenance personnel to check the leakage point of the indoor unit. If the refrigerant sensor stops alarming in the second time period and resets normally, it is determined that the refrigerant sensor is faulty, and a sensor fault troubleshooting message is sent to the client, so as to alarm the operation and maintenance personnel to check the refrigerant sensor. Since whether checking the leakage point or checking whether the refrigerant sensor is faulty, the refrigerant needs to be recovered, therefore, in the case that the refrigerant sensor is abnormally reset in the first time period, the outdoor unit is controlled to recover the refrigerant in the ducted air conditioner, so as to shorten the waiting time for checking.

[0101] The embodiment of the present application can control the refrigerant sensor and the air inlet and outlet valves of the ducted air conditioner in linkage, stop the fan of the ducted air conditioner when the refrigerant sensor alarm is detected, and simultaneously close the air inlet and outlet valves of the ducted air conditioner, and perform secondary detection inside the ducted air conditioner to determine whether the refrigerant sensor is a false alarm. When the refrigerant sensor still alarms during the secondary detection, it can be determined that the refrigerant sensor is a normal alarm, and the outdoor unit can perform refrigerant recovery at this time. At this time, the air outlet valve can be opened, and the air outlet fan of the air outlet duct can be opened to discharge the gas containing refrigerant from the ducted air conditioner, and ensure the safety and reliability of the application site of the ducted air conditioner.

[0102] The embodiment of the present application also provides a refrigerant leakage detection device. Figure 5 As shown in the figure, it is a structural diagram of the refrigerant leakage detection device according to an embodiment of the present application.

[0103] The refrigerant leakage detection device comprises:

[0104] The closing module 510 is configured to perform closed control on the ducted air conditioner after the alarm signal of the refrigerant sensor is received for the first time.

[0105] The detection module 520 is configured to determine the refrigerant leakage state by performing false alarm detection on the refrigerant sensor.

[0106] The starting module 530 is configured to perform air supply control on the ducted air conditioner when the determination module determines that the refrigerant leakage state is not leaked.

[0107] The control module 540 is configured to control the outdoor unit to recover refrigerant when the determination module determines that the refrigerant leakage state is leaked.

[0108] The functions of the device described in the embodiment of the present application have been described in the above method embodiment, so the description of the present embodiment is not detailed, and the relevant description in the foregoing embodiments can be referred to, which will not be repeated here.

[0109] The embodiment of the present application also provides a refrigerant leakage detection device, as shown in the figure, it is a structural diagram of the refrigerant leakage detection device according to an embodiment of the present application. Figure 6

[0110] The refrigerant leakage detection device comprises a processor 610, a communication interface 620, a memory 630 and a communication bus 640. The processor 610, the communication interface 620 and the memory 630 communicate with each other through the communication bus 640.

[0111] The memory 630 is configured to store a computer program.

[0112] ​In an embodiment of the present application, the processor 610, when executing the program stored in the memory 630, implements the refrigerant leakage detection method provided by any one of the foregoing method embodiments, including: after first receiving an alarm signal of a refrigerant sensor, performing airtight control on a ducted air conditioner; determining a refrigerant leakage state corresponding to the ducted air conditioner by performing false alarm detection on the refrigerant sensor; if the refrigerant leakage state is non-leakage, performing air supply control on the ducted air conditioner; and if the refrigerant leakage state is leakage, controlling an outdoor unit to recover refrigerant.

[0113] The refrigerant leakage state corresponding to the ducted air conditioner is determined according to the alarm reset state of the refrigerant sensor, including: if it is detected that the refrigerant sensor is normally reset, determining that the false alarm detection result is false alarm; and if it is detected that the refrigerant sensor cannot be reset, determining that the false alarm detection result is normal alarm.

[0114] The refrigerant leakage state corresponding to the ducted air conditioner is determined according to the alarm reset state of the refrigerant sensor, including: if it is detected that the refrigerant sensor is normally reset, determining that the false alarm detection result is false alarm; and if it is detected that the refrigerant sensor cannot be reset, determining that the false alarm detection result is normal alarm.

[0115] The refrigerant leakage state corresponding to the ducted air conditioner is determined according to the alarm reset state of the refrigerant sensor, including: if it is detected that the refrigerant sensor is normally reset, determining that the false alarm detection result is false alarm; and if it is detected that the refrigerant sensor cannot be reset, determining that the false alarm detection result is normal alarm.

[0116] The refrigerant leakage state corresponding to the ducted air conditioner is determined according to the alarm reset state of the refrigerant sensor, including: if it is detected that the refrigerant sensor is normally reset, determining that the false alarm detection result is false alarm; and if it is detected that the refrigerant sensor cannot be reset, determining that the false alarm detection result is normal alarm.

[0117] The method further includes: if it is detected that the refrigerant sensor is normally reset in the second time period, determining that the refrigerant sensor is faulty and issuing a preset sensor fault troubleshooting message.

[0118] The control of the outdoor unit to recover refrigerant further includes: sending a preset refrigerant leakage troubleshooting message; and / or turning on an exhaust device in the ducted air conditioner.

[0119] The air conditioner provided by the embodiment of the present application comprises the refrigerant leakage detection device. After receiving the alarm signal for the first time, the air conditioner can make the duct a closed space, increase the detection accuracy of the refrigerant sensor, and avoid refrigerant leakage to the external environment. Then, whether the refrigerant sensor is in a false alarm state is identified. According to whether the refrigerant sensor is in the false alarm state, it can be determined whether the refrigerant leaks and corresponding measures are taken. The embodiment of the present application can accurately determine whether the refrigerant leaks by detecting whether the refrigerant sensor is in a false alarm state, and avoid the problem that refrigerant recovery needs to be blindly performed every time an alarm message is received.

[0120] The embodiment of the present application further provides a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the steps of the refrigerant leakage detection method provided by any one of the preceding method embodiments. Since the refrigerant leakage detection method has been described in detail above, the description of the present embodiment will not be described in detail.

[0121] The device embodiments described above are only schematic, and the units shown as separate components can or can not be physically separate, and the components shown as units can or can not be physical units, i.e., they can be located in one place, or distributed on multiple network units. Part or all of the modules can be selected according to actual needs to achieve the purpose of the present embodiment.

[0122] Through the description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be realized by means of software plus a general hardware platform, or by hardware. Based on this understanding, the above technical solutions or the part that contributes to the related art can be embodied in the form of a software product, which can be stored in a computer readable storage medium, such as a ROM / RAM, a magnetic disk, an optical disk, etc., and includes a plurality of instructions to make a computer device (which can be a personal computer, a server, or a network device, etc.) execute the methods described in each embodiment or some parts of the embodiments.

[0123] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order

[0124] The above description is that of current embodiments of the application. Various modifications and changes can be made thereto without departing from the spirit and scope of the application as set forth. The scope of the application is not to be limited to the exact details shown above.

Claims

1. A refrigerant leakage detection method characterized by comprising: The method comprises the following steps: performing airtight control on the ducted type air conditioner after first receiving an alarm signal of a refrigerant sensor; determining a refrigerant leakage state corresponding to the ducted type air conditioner by performing false alarm detection on an alarm reset state of the refrigerant sensor; wherein the step of determining the refrigerant leakage state corresponding to the ducted type air conditioner by performing false alarm detection on the alarm reset state of the refrigerant sensor comprises the following steps: detecting the alarm reset state of the refrigerant sensor; determining a false alarm detection result corresponding to the refrigerant sensor according to the alarm reset state of the refrigerant sensor; if the false alarm detection result is a false alarm, determining that the refrigerant leakage state corresponding to the ducted type air conditioner is not leaked; if the false alarm detection result is a normal alarm, determining that the refrigerant leakage state corresponding to the ducted type air conditioner is leaked; wherein the step of determining the false alarm detection result corresponding to the refrigerant sensor according to the alarm reset state of the refrigerant sensor comprises the following steps: if it is detected that the refrigerant sensor is abnormally reset within a preset first time period, detecting an alarm reset state of the refrigerant sensor within a preset second time period; wherein the second time period is a time period immediately after the first time period; if it is detected that the refrigerant sensor is normally reset within the second time period, determining that the false alarm detection result is a false alarm; otherwise, determining that the false alarm detection result is a normal alarm; the normal reset refers to that the refrigerant sensor is reset after sending an alarm signal and does not send an alarm signal within a preset time length; the abnormal reset refers to intermittent alarm and reset of the refrigerant sensor after sending an alarm signal; if the refrigerant leakage state is not leaked, performing air supply control on the ducted type air conditioner; if the refrigerant leakage state is leaked, controlling an outdoor unit to recover refrigerant.

2. The method of claim 1, wherein, The step of determining the false alarm detection result corresponding to the refrigerant sensor according to the alarm reset state of the refrigerant sensor comprises the following steps: if it is detected that the refrigerant sensor is normally reset, determining that the false alarm detection result is a false alarm; if it is detected that the refrigerant sensor cannot be reset, determining that the false alarm detection result is a normal alarm.

3. The method of claim 1, wherein, The method further comprises the following steps: if it is detected that the refrigerant sensor is normally reset within the second time period, determining that the refrigerant sensor is faulty and sending a preset sensor fault troubleshooting message.

4. The method of claim 1, wherein, The step of controlling the outdoor unit to recover refrigerant further comprises the following steps: sending a preset refrigerant leakage troubleshooting message; and / or opening an exhaust device in the ducted type air conditioner.

5. The method according to claim 1, wherein the step of performing airtight control on the ducted type air conditioner comprises the following steps: closing an air supply device and an exhaust device of the ducted type air conditioner; the step of performing air supply control on the ducted type air conditioner comprises the following step: restarting the air supply device.

6. A refrigerant leakage detecting apparatus characterized by comprising: The method comprises the following steps: a closing module for performing airtight control on the ducted type air conditioner after first receiving an alarm signal of a refrigerant sensor; The detection module is configured to determine the refrigerant leakage state by performing false alarm detection on the alarm reset state of the refrigerant sensor; wherein the determination of the refrigerant leakage state corresponding to the ducted air conditioner by performing false alarm detection on the alarm reset state of the refrigerant sensor comprises: detecting the alarm reset state of the refrigerant sensor; determining a false alarm detection result corresponding to the refrigerant sensor according to the alarm reset state of the refrigerant sensor; if the false alarm detection result is a false alarm, determining that the refrigerant leakage state corresponding to the ducted air conditioner is not leaked; if the false alarm detection result is a normal alarm, determining that the refrigerant leakage state corresponding to the ducted air conditioner is leaked; the determination of the false alarm detection result corresponding to the refrigerant sensor according to the alarm reset state of the refrigerant sensor comprises: if it is detected that the refrigerant sensor is abnormally reset within a preset first time period, detecting the alarm reset state of the refrigerant sensor within a preset second time period; wherein the second time period is a time period immediately after the first time period; if it is detected that the refrigerant sensor is normally reset within the second time period, determining that the false alarm detection result is a false alarm; otherwise, determining that the false alarm detection result is a normal alarm; the normal reset refers to that the refrigerant sensor sends an alarm signal, is reset, and does not send an alarm signal again within a preset time length; the abnormal reset refers to that the refrigerant sensor sends an alarm signal intermittently and is reset; The starting module is configured to perform air supply control on the ducted air conditioner when the detection module determines that the refrigerant leakage state is not leaked. The control module is configured to control the outdoor unit to recover refrigerant when the detection module determines that the refrigerant leakage state is leaked.

7. A refrigerant leakage detecting apparatus characterized by comprising: The air conditioning device comprises the refrigerant leakage detection device of claim 7. The computer readable storage medium stores computer executable instructions, and the computer executable instructions are executed to implement the refrigerant leakage detection method of any one of claims 1-5. The computer readable storage medium stores computer executable instructions, and the computer executable instructions are executed to implement the refrigerant leakage detection method of any one of claims 1-5. ​ 8. An air conditioning apparatus characterized by comprising: ​ 9. A computer-readable storage medium, characterized in that, ​

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