Detection Method and Detection Device for Refrigerant Leakage of Air Conditioner and Air Conditioner

Abstract

The present invention belongs to the technical field of air conditioners, and particularly relates to a method and device for detecting refrigerant leakage of an air conditioner, and an air conditioner. The air conditioner includes a sensor and a control board, where the sensor is connected to the control board and is used to feedback a pulse signal indicating the characteristics of refrigerant flow to the control board. The method includes: obtaining the pulse signal feedback by the sensor; generating a control strategy for adjusting the operation of the compressor according to the pulse signal; and controlling the operation of the compressor according to the control strategy. The detection device includes: a signal acquisition module for obtaining the pulse signal feedback by the sensor; a strategy generation module for generating a control strategy for adjusting the operation of the compressor according to the pulse signal; and a control operation module for controlling the operation of the compressor according to the control strategy. The method and device for detecting refrigerant leakage of the present air conditioner and the air conditioner judge whether the refrigerant leaks according to the pulse signal and generate corresponding control strategies accordingly.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a method and a detection device for detecting refrigerant leakage of an air conditioner, and an air conditioner. Background Art

[0002] Refrigerant is the "blood" of the air conditioner. The amount of refrigerant filled will affect the operation of the air conditioner. When the refrigerant is insufficient, the air conditioner cannot perform as it should. Therefore, the air conditioner will be filled with appropriate refrigerant before leaving the factory. However, with the increase of years of use or other reasons, there will be insufficient refrigerant or leakage.

[0003] Currently, refrigerants are colorless and odorless gases, and it is not easy to detect leaks. Once a refrigerant leak occurs, not only will the cooling and heating efficiency of the air conditioner be reduced, but if it is discovered too late, the maintenance cost will also increase, and there will also be safety issues. Although the refrigerants of current air conditioners are non-toxic and have a low ignition point, some refrigerants also have defects and will explode when exposed to open flames. Summary of the invention

[0004] In order to detect the refrigerant leakage in time when it occurs, and avoid a series of problems caused by the refrigerant leakage, such as reduced air-conditioning operating efficiency, high subsequent maintenance costs, and potential safety hazards, the present invention provides a method for detecting the refrigerant leakage of an air conditioner, wherein the air conditioner comprises: a sensor and a control board, the sensor is connected to the control board, and is used to feed back a pulse signal identifying the refrigerant flow characteristics to the control board;

[0005] The method comprises:

[0006] Acquiring a pulse signal fed back by the sensor;

[0007] generating a control strategy for regulating the operation of the compressor according to the pulse signal;

[0008] The operation of the compressor is controlled according to the control strategy.

[0009] According to the method for detecting air conditioning refrigerant leakage provided by the present invention, the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal specifically includes:

[0010] Determining that the refrigerant flow feature identified by the pulse signal is a refrigerant leak, and obtaining the suspected refrigerant type of the leaked refrigerant;

[0011] A control strategy for regulating the operation of the compressor is generated based on the suspected refrigerant type.

[0012] According to the method for detecting air conditioner refrigerant leakage provided by the present invention, the step of obtaining the suspected refrigerant type of the leaked refrigerant specifically includes:

[0013] Obtain the type code information storing the refrigerant type;

[0014] Determine a comparison result according to the type code information and the suspected refrigerant type;

[0015] Determine that the suspected refrigerant type is the first refrigerant type or the second refrigerant type according to the comparison result.

[0016] According to the method for detecting air-conditioning refrigerant leakage provided by the present invention, in the step of controlling the operation of the compressor according to the control strategy, it specifically includes:

[0017] Determine that the suspected refrigerant type is the first refrigerant type, and reduce the immediate operating frequency of the compressor to a first preset frequency, where the first preset frequency is the operating frequency of the compressor corresponding to when the refrigerant leakage is slowed down;

[0018] Determine that the suspected refrigerant type is the second refrigerant type, and increase the immediate operating frequency of the compressor to a second preset frequency, where the second preset frequency is the operating frequency of the compressor corresponding to when the refrigerant leakage is slowed down.

[0019] According to the method for detecting air-conditioning refrigerant leakage provided by the present invention, in the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it further includes:

[0020] Determine that the refrigerant identified by the pulse signal leaks, and the control board controls the alarm system to give an alarm.

[0021] According to the method for detecting air-conditioning refrigerant leakage provided by the present invention, in the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it specifically includes:

[0022] The pulse signal is the duration of the high level and the low level in one cycle;

[0023] Obtain the comparison result of the duration of the high level and the low level of the pulse signal in the previous cycle;

[0024] Determine the refrigerant flow characteristics identified by the pulse signal according to the comparison result.

[0025] According to the method for detecting air-conditioning refrigerant leakage provided by the present invention, in the step of determining the refrigerant flow characteristics identified by the pulse signal according to the comparison result, it specifically includes:

[0026] Determine that the duration of the high level in the pulse signal in the previous cycle increases by a first preset time, and the duration of the low level shortens by a second preset time, and the refrigerant flow characteristics identified by the pulse signal are refrigerant leakage;

[0027] Wherein, the first preset time is the duration of the high level corresponding to refrigerant leakage, and the second preset time is the duration of the low level corresponding to refrigerant leakage.

[0028] According to the method for detecting refrigerant leakage of an air conditioner provided by the present invention, in the step of determining the refrigerant flow characteristics indicated by the pulse signal according to the comparison result, the following is further included:

[0029] It is determined that the duration of the high level of the pulse signal increases by a third preset time compared with the previous cycle, and the duration of the low level shortens by a fourth preset time. The refrigerant flow characteristics indicated by the pulse signal are a sensor failure;

[0030] Wherein, the third preset time is the duration of the high level corresponding to the sensor failure, and the fourth preset time is the duration of the low level corresponding to the sensor failure.

[0031] The present invention also provides a device for detecting refrigerant leakage of an air conditioner, including:

[0032] A signal acquisition module, configured to acquire a pulse signal fed back by a sensor;

[0033] A strategy generation module, configured to generate a control strategy for adjusting the operation of the compressor according to the pulse signal;

[0034] A control operation module, configured to control the operation of the compressor according to the control strategy.

[0035] The present invention also provides an air conditioner, including: a sensor and a control board;

[0036] The sensor is connected to the control board and is configured to feed back a pulse signal indicating refrigerant flow characteristics to the control board;

[0037] The control board acquires the pulse signal fed back by the sensor; generates a control strategy for adjusting the operation of the compressor according to the pulse signal; and controls the operation of the compressor according to the control strategy.

[0038] Advantages of the present invention:

[0039] The method for detecting refrigerant leakage of an air conditioner, the detection device and the air conditioner provided by the present invention monitor and feed back in real time a pulse signal indicating refrigerant flow characteristics through a sensor, judge whether refrigerant leakage occurs according to the pulse signal, and correspondingly generate a control strategy to adjust the operation of the compressor. That is, when refrigerant leakage occurs, the operation frequency of the compressor is adjusted to slow down the speed of refrigerant leakage, reduce the losses of users, and protect the safety of users.

[0040] Through the method and device for detecting refrigerant leakage of an air conditioner and the air conditioner provided by the present invention, it is possible to accurately detect in real time whether the refrigerant leaks. It has high sensitivity and strong practicability, and can adjust the operation of the compressor in time when refrigerant leakage is detected, thereby slowing down the refrigerant leakage speed and avoiding a series of problems such as reduced air conditioner operation efficiency, high subsequent maintenance costs, and potential safety hazards. Description of the Drawings

[0041] In order to more clearly illustrate the technical solutions in the present invention or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0042] Figure 1 It is a schematic flowchart of the method for detecting refrigerant leakage of an air conditioner provided by the present invention;

[0043] Figure 2 It is a specific embodiment of the method for detecting refrigerant leakage of an air conditioner provided by the present invention;

[0044] Figure 3 It is a state diagram of a pulse signal in the method for detecting refrigerant leakage of an air conditioner provided by the present invention;

[0045] Figure 4 It is a schematic structural diagram of the device for detecting refrigerant leakage of an air conditioner provided by the present invention;

[0046] Figure 5 It is a schematic structural diagram of the air conditioner provided by the present invention. Detailed Embodiments

[0047] To make the objectives, technical solutions, and advantages of the present invention clearer, the following will clearly and completely describe the technical solutions in the present invention in conjunction with the drawings in the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0048] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "vertical", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the embodiments of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0049] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0050] In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0051] The following describes the detection method, detection device and air conditioner for refrigerant leakage provided by the present invention with reference to the drawings of the specification.

[0052] As Figure 1 shown, a flowchart of the detection method for refrigerant leakage of an air conditioner is provided. It can be intuitively known from the figure that when detecting whether the refrigerant of the air conditioner leaks, first, a pulse signal indicating the flow characteristics of the refrigerant fed back by the sensor is obtained, and then a control strategy for adjusting the operation of the compressor is generated according to the pulse signal, and the operation of the compressor is controlled according to the control strategy. For example, if the pulse signal indicates that the refrigerant does not leak abnormally, the compressor operates normally; if the pulse signal indicates that the refrigerant leaks abnormally, the operating frequency of the compressor is increased or decreased to slow down the refrigerant leakage speed, reduce the user's loss, and ensure the user's safety.

[0053] As Figure 2As shown, a specific embodiment of the method for detecting air-conditioning refrigerant leakage is provided. It can be intuitively known from the figure that according to the type of the leaked refrigerant, the control board can control and adjust the operating frequency of the air-conditioning compressor. Since there can only be one type of refrigerant in a machine and it will not change, taking the refrigerant types of R290, R32, and R410A as examples, if the leaked refrigerant type is R290 refrigerant, the control board controls the compressor to reduce the operating frequency; if the leaked refrigerant type is R32 or R410A refrigerant, the control board controls the compressor to increase the operating frequency, thereby slowing down the leakage speed of the refrigerant.

[0054] As Figure 3 shown, a state diagram of the pulse signal in the method for detecting air-conditioning refrigerant leakage is provided. It can be intuitively known from the figure that according to the duration of the high level and the low level of the pulse signal indicating the refrigerant flow characteristics within one cycle, the pulse signal is divided into four states, namely the preheating state, the working state, the alarm state, and the fault state. Among them, the preheating state and the working state represent the normal operating state of the air conditioner, that is, the refrigerant does not leak in the preheating state and the working state; the alarm state represents the abnormal operating state of the air conditioner, that is, the refrigerant leaks in the alarm state; the fault state represents the abnormal state of the sensor, that is, the sensor is damaged or fails in the fault state.

[0055] In addition, the duration of the pulse signal within one cycle is 375 ms; in the preheating state, the duration of the high level is 75 ms and the duration of the low level is 300 ms; in the working state, the duration of the high level is 75 ms and the duration of the low level is 300 ms; in the alarm state, the duration of the high level is 225 ms and the duration of the low level is 150 ms; in the fault state, the duration of the high level is 300 ms and the duration of the low level is 75 ms.

[0056] As Figure 4 shown, a structural schematic diagram of the device for detecting air-conditioning refrigerant leakage is provided. It can be intuitively known from the figure that this detection device includes: a signal acquisition module, a strategy generation module, and a control operation module; among them, the signal acquisition module is used to acquire the pulse signal fed back by the sensor; the strategy generation module is used to generate a control strategy for adjusting the operation of the compressor according to the pulse signal; the control operation module is used to control the operation of the compressor according to the control strategy. To implement the above method for detecting air-conditioning refrigerant leakage.

[0057] As Figure 5As shown in the figure, a schematic structural diagram of an air conditioner is provided. It can be intuitively known from the figure that the air conditioner includes: a sensor and a control board. A sensor interface is provided on the control board, and the sensor is connected to the control board through the sensor interface. Among them, the sensor is used to feedback a pulse signal indicating the characteristics of the refrigerant flow to the control board; the control board obtains the pulse signal feedback by the sensor, generates a control strategy for adjusting the operation of the air conditioner compressor according to the pulse signal, and controls the operation of the air conditioner compressor according to the control strategy. To implement the above method for detecting refrigerant leakage in an air conditioner.

[0058] To better understand the above technical solution, the following will detail the method for detecting refrigerant leakage in an air conditioner, the detection device, and each specific implementation manner of the air conditioner.

[0059] According to the embodiment of the first aspect provided by the present invention, referring to Figures 1-3 , a method for detecting refrigerant leakage in an air conditioner is provided, where

[0060] the air conditioner includes: a sensor and a control board. The sensor is connected to the control board and is used to feedback a pulse signal indicating the characteristics of the refrigerant flow to the control board;

[0061] The detection method includes:

[0062] Obtain the pulse signal feedback by the sensor;

[0063] Generate a control strategy for adjusting the operation of the compressor according to the pulse signal;

[0064] Control the operation of the compressor according to the control strategy.

[0065] Refrigerant is the "blood" of an air conditioner. Currently, refrigerants are all colorless and odorless gases, and it is not easy to detect leakage problems. Once refrigerant leakage occurs, not only will the cooling and heating efficiency of the air conditioner become low, but also if the discovery time is late, the maintenance cost will increase, and there are also safety problems. Although current air conditioner refrigerants all have the characteristics of being non-toxic and having a low ignition point, some refrigerants also have defects and will explode when encountering an open flame.

[0066] To solve the above problems and be able to detect refrigerant leakage in a timely manner, avoiding a series of problems such as reduced air conditioner operation efficiency, high subsequent maintenance costs, and potential safety hazards caused by refrigerant leakage, in this embodiment, a sensor (specifically a refrigerant sensor) is used to monitor and feedback in real time a pulse signal indicating the characteristics of the refrigerant flow, determine whether refrigerant leakage has occurred according to the pulse signal, and correspondingly generate a control strategy to adjust the operation of the compressor. That is, when refrigerant leakage occurs, the operation frequency of the compressor is adjusted to slow down the speed of refrigerant leakage, reduce the user's losses, and protect the user's safety.

[0067] According to the air conditioner refrigerant leakage detection method provided in this embodiment, in the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it specifically includes:

[0068] Determine that the refrigerant flow characteristic identified by the pulse signal is refrigerant leakage, and obtain the suspected refrigerant type of the leaked refrigerant;

[0069] Generate a control strategy for adjusting the operation of the compressor according to the suspected refrigerant type.

[0070] Since there is more than one type of refrigerant, when different types of refrigerants leak, it is necessary to control the compressor to execute different control strategies according to the type of the leaked refrigerant. Also, since there can only be one type of refrigerant in one machine and the type will not be changed, it is convenient to detect the suspected refrigerant type of the leakage. After determining the refrigerant type, correspondingly control and adjust the operating frequency of the compressor to increase or decrease, so as to slow down the speed of refrigerant leakage.

[0071] Adopting this method improves the scope of refrigerant leakage detection, making it not limited to the detection of only one type of refrigerant, and enabling accurate and effective control strategies to be made based on the refrigerant type detection results.

[0072] According to the air conditioner refrigerant leakage detection method provided in this embodiment, in the step of obtaining the suspected refrigerant type of the leaked refrigerant, it specifically includes:

[0073] Obtain the type code information storing the refrigerant type;

[0074] Determine the comparison result according to the type code information and the suspected refrigerant type;

[0075] Determine that the suspected refrigerant type is the first refrigerant type or the second refrigerant type according to the comparison result.

[0076] The refrigerant types can be predefined in the control program, and different refrigerant types correspond to different type code information. For example, the following definitions are made: 01 - R32, 02 - R410A, 03 - R290. Among them, 01, 02, and 03 respectively represent different codes, and R32, R410A, and R290 respectively represent different types of refrigerants. Different codes represent different refrigerants, which facilitates retrieving the type code information to identify the refrigerant type when refrigerant leakage occurs.

[0077] In addition, the refrigerants can be divided into the first refrigerant type and the second refrigerant type according to the properties of the refrigerants. For example, the refrigerants can be classified according to the operation result of controlling the compressor.

[0078] According to the air conditioner refrigerant leakage detection method provided in this embodiment, in the step of controlling the operation of the compressor according to the control strategy, it specifically includes:

[0079] Determine that the suspected refrigerant type is the first refrigerant type, and reduce the immediate operating frequency of the compressor to the first preset frequency, where the first preset frequency is the compressor operating frequency corresponding to when the refrigerant leakage is slowed down;

[0080] Determine that the suspected refrigerant type is the second refrigerant type, and increase the immediate operating frequency of the compressor to the second preset frequency, where the second preset frequency is the compressor operating frequency corresponding to when the refrigerant leakage is slowed down.

[0081] The classification of the first refrigerant type and the second refrigerant type can be divided according to the adjustment strategy for controlling the compressor operation when the refrigerant leaks. For example, the refrigerant type that controls the compressor to reduce the operating frequency when the refrigerant leaks is classified as the first refrigerant type. Similarly, the refrigerant type that controls the compressor to increase the operating frequency when the refrigerant leaks is classified as the second refrigerant type. Among them, the first refrigerant type includes R290 refrigerant, and the second refrigerant type includes R32 and R410A refrigerants.

[0082] According to the method for detecting refrigerant leakage of the air conditioner provided in this embodiment, in the step of generating a control strategy for adjusting the compressor operation according to the pulse signal, it further includes:

[0083] Determine that the refrigerant identified by the pulse signal leaks, and the control board controls the alarm system to issue an alarm.

[0084] When it is determined that the refrigerant leaks, on the one hand, control the operating frequency of the compressor to reduce the refrigerant leakage speed, and on the other hand, control the alarm system to issue an alarm to remind the user that the refrigerant is leaking, thereby reminding the user to take effective measures to prevent the refrigerant from leaking in time and reducing the safety risks and cost losses brought by the refrigerant leakage.

[0085] Among them, the alarm system can adopt a voice broadcast system to play the voice broadcast in a loop until the user takes effective measures to stop the refrigerant from leaking; the alarm system can also adopt an alarm to emit a warning sound until the user takes effective measures to stop the refrigerant from leaking.

[0086] According to the method for detecting refrigerant leakage of the air conditioner provided in this embodiment, refer to Figure 3 , in the step of generating a control strategy for adjusting the compressor operation according to the pulse signal, it specifically includes:

[0087] The pulse signal is the duration of the high level and the low level in one cycle;

[0088] Obtain the comparison result of the duration of the high level and the low level of the pulse signal in the previous cycle;

[0089] Determine the refrigerant flow characteristics identified by the pulse signal according to the comparison result.

[0090] This embodiment provides a method for determining whether the refrigerant leaks according to the pulse signal, that is, by judging through the duration of the high and low levels of the pulse signal within one cycle. Specifically, obtain the duration of the high and low levels of the pulse signal within this cycle, and compare this pulse signal with the pulse signal in the previous cycle. If the duration of the high and low levels changes, it means that an abnormality occurs during the operation of the air conditioner. At this time, the reason corresponding to the abnormality can be known according to the comparison result.

[0091] According to the method for detecting refrigerant leakage of the air conditioner provided by this embodiment, in the step of determining the refrigerant flow characteristics identified by the pulse signal according to the comparison result, it specifically includes:

[0092] Determine that the duration of the high level of the pulse signal increases to the first preset time compared with the previous cycle, and the duration of the low level shortens to the second preset time. The refrigerant flow characteristics identified by the pulse signal are refrigerant leakage;

[0093] Wherein, the first preset time is the duration of the high level corresponding to refrigerant leakage, and the second preset time is the duration of the low level corresponding to refrigerant leakage.

[0094] This embodiment provides a method for determining that the refrigerant leaks. Refer to Figure 3 , when the air conditioner operates normally, the duration of the high level of the pulse signal within one cycle is 75 ms, and the duration of the low level is 300 ms. If it is detected that the duration of the high and low levels of the pulse signal in the current cycle changes, becoming the duration of the high level is 225 ms (i.e., the above first preset time), and the duration of the low level is 150 ms (i.e., the above second preset time), it is determined that the refrigerant leaks.

[0095] According to the method for detecting refrigerant leakage of the air conditioner provided by this embodiment, in the step of determining the refrigerant flow characteristics identified by the pulse signal according to the comparison result, it also includes:

[0096] Determine that the duration of the high level of the pulse signal increases to the third preset time compared with the previous cycle, and the duration of the low level shortens to the fourth preset time. The refrigerant flow characteristics identified by the pulse signal are sensor failure;

[0097] Wherein, the third preset time is the duration of the high level corresponding to sensor failure, and the fourth preset time is the duration of the low level corresponding to sensor failure.

[0098] This embodiment provides a method for determining that the sensor is damaged. Refer to Figure 3, when the air conditioner is operating normally, the duration of the high level of the pulse signal in one cycle is 75ms, and the duration of the low level is 300ms. If it is detected that the duration of the high and low levels of the pulse signal in the current cycle has changed, with the high level duration becoming 300ms (i.e., the above-mentioned third preset time) and the low level duration becoming 75ms (i.e., the above-mentioned fourth preset time), it is determined that the sensor has a damage fault.

[0099] The method for detecting refrigerant leakage of the air conditioner provided in this embodiment connects the sensor to the control board of the air conditioner, specifically to the main chip, to form a refrigerant leakage detection circuit. Utilizing the characteristics of the sensor, it feeds back a pulse signal indicating the characteristics of refrigerant flow to the main chip. The main chip monitors in real time the duration of the high and low levels of the pulse signal. When the main chip detects that the pulse signal remains high for 225ms and remains low for 150ms, it is determined that refrigerant leakage has occurred, and the operation frequency of the compressor is started to be controlled to slow down the speed of refrigerant leakage, and at the same time, the machine issues an alarm.

[0100] This embodiment determines whether refrigerant leaks through the pulse signal sent by the sensor to the main chip, controls the operation of the compressor at the same time to reduce the losses of users, and can report faults in a timely manner to remind users of the existing dangers and protect the safety of users.

[0101] According to the embodiment provided in the second aspect of the present invention, with reference to Figure 4 , a device for detecting refrigerant leakage of an air conditioner is provided, including:

[0102] A signal acquisition module for acquiring the pulse signal fed back by the sensor;

[0103] A strategy generation module for generating a control strategy for adjusting the operation of the compressor according to the pulse signal;

[0104] A control operation module for controlling the operation of the compressor according to the control strategy.

[0105] Through the device for detecting refrigerant leakage of the air conditioner provided in this embodiment, it can accurately detect in real time whether refrigerant leakage occurs, with high sensitivity and strong practicability. When refrigerant leakage is found, it can timely adjust the operation of the compressor, thereby slowing down the speed of refrigerant leakage and avoiding a series of problems such as reduced air conditioner operation efficiency, high subsequent maintenance costs, and potential safety hazards.

[0106] According to the embodiment provided in the third aspect of the present invention, with reference to Figure 5 , an air conditioner is provided, including: a sensor and a control board;

[0107] The sensor is connected to the control board and is used to feed back a pulse signal indicating the characteristics of refrigerant flow to the control board;

[0108] The control board obtains the pulse signal fed back by the sensor, generates a control strategy for adjusting the operation of the compressor according to the pulse signal, and controls the operation of the compressor according to the control strategy.

[0109] Through the air conditioner provided in this embodiment, it is possible to detect in real time and accurately whether the refrigerant leaks. It has high sensitivity and strong practicability, and can adjust the operation of the compressor in time when the refrigerant leak is detected, so as to slow down the refrigerant leak speed and avoid a series of problems such as reduced air conditioner operation efficiency, high subsequent maintenance costs, and potential safety hazards.

[0110] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed to multiple network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0111] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments or equivalently replace some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A detection method for refrigerant leakage of an air conditioner, characterized in that, The air conditioner includes: a sensor and a control board. The sensor is connected to the control board and is used to feedback a pulse signal identifying the refrigerant flow characteristics to the control board; The method includes: Obtaining the pulse signal feedback by the sensor; Generating a control strategy for adjusting the operation of the compressor according to the pulse signal; Controlling the operation of the compressor according to the control strategy; In the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it specifically includes: the pulse signal is the duration of the high level and the low level within one cycle; obtaining the comparison result of the duration of the high level and the low level of the pulse signal compared with the previous cycle; determining the refrigerant flow characteristics identified by the pulse signal according to the comparison result; In the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it specifically further includes: determining that the refrigerant flow characteristics identified by the pulse signal is refrigerant leakage, obtaining the suspected refrigerant type of the leaked refrigerant; generating a control strategy for adjusting the operation of the compressor according to the suspected refrigerant type; In the step of controlling the operation of the compressor according to the control strategy, it specifically includes: determining that the suspected refrigerant type is the first refrigerant type, reducing the immediate operation frequency of the compressor to the first preset frequency, where the first preset frequency is the compressor operation frequency corresponding to when the refrigerant leakage is slowed down; determining that the suspected refrigerant type is the second refrigerant type, increasing the immediate operation frequency of the compressor to the second preset frequency, where the second preset frequency is the compressor operation frequency corresponding to when the refrigerant leakage is slowed down.

2. The detection method for air conditioner refrigerant leakage according to claim 1, characterized in that In the step of obtaining the suspected refrigerant type of the leaked refrigerant, it specifically includes: Obtaining the type code information storing the refrigerant type; Determining the comparison result according to the type code information and the suspected refrigerant type; Determining that the suspected refrigerant type is the first refrigerant type or the second refrigerant type according to the comparison result.

3. The detection method for air conditioner refrigerant leakage according to claim 1, characterized in that, In the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it further includes: Determining that the refrigerant identified by the pulse signal leaks, and the control board controls the alarm system to give an alarm.

4. The method for detecting refrigerant leakage of the air conditioner according to any one of claims 1-3, wherein In the step of determining the refrigerant flow characteristics identified by the pulse signal according to the comparison result, it specifically includes: Determining that the duration of the high level of the pulse signal increases by the first preset time compared with the previous cycle, and the duration of the low level shortens by the second preset time, and the refrigerant flow characteristics identified by the pulse signal is refrigerant leakage; Wherein, the first preset time is the duration of the high level corresponding to when the refrigerant leaks, and the second preset time is the duration of the low level corresponding to when the refrigerant leaks.

5. The method for detecting refrigerant leakage of the air conditioner according to any one of claims 1-3, wherein In the step of determining the refrigerant flow characteristics identified by the pulse signal according to the comparison result, it further includes: Determine that the high-level duration of the pulse signal in the current cycle increases by a third preset time compared to the previous cycle, and the low-level duration shortens by a fourth preset time. The refrigerant flow characteristic identified by the pulse signal indicates a sensor failure. Wherein, the third preset time is the high-level duration corresponding to the sensor failure, and the fourth preset time is the low-level duration corresponding to the sensor failure.

6. A detection device for refrigerant leakage of an air conditioner, characterized in that, It includes: A signal acquisition module, configured to acquire the pulse signal fed back by the sensor. A strategy generation module, configured to generate a control strategy for adjusting the operation of the compressor according to the pulse signal. A control operation module, configured to control the operation of the compressor according to the control strategy. Wherein, in the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it specifically includes: the pulse signal is the duration of the high level and the low level within one cycle; obtaining the comparison result of the high-level and low-level durations of the pulse signal compared to the previous cycle; determining the refrigerant flow characteristic identified by the pulse signal according to the comparison result. In the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it specifically further includes: determining that the refrigerant flow characteristic identified by the pulse signal is refrigerant leakage, and obtaining the suspected refrigerant type of the leaked refrigerant; generating a control strategy for adjusting the operation of the compressor according to the suspected refrigerant type. In the step of controlling the operation of the compressor according to the control strategy, it specifically includes: determining that the suspected refrigerant type is the first refrigerant type, and reducing the immediate operation frequency of the compressor to a first preset frequency, where the first preset frequency is the compressor operation frequency corresponding to the slowdown of refrigerant leakage; determining that the suspected refrigerant type is the second refrigerant type, and increasing the immediate operation frequency of the compressor to a second preset frequency, where the second preset frequency is the compressor operation frequency corresponding to the slowdown of refrigerant leakage.

7. An air conditioner, characterized in that, It includes: A sensor and a control board; The sensor is connected to the control board and is configured to feed back a pulse signal identifying the refrigerant flow characteristic to the control board. The control board acquires the pulse signal fed back by the sensor. Generates a control strategy for adjusting the operation of the compressor according to the pulse signal; and controls the operation of the compressor according to the control strategy. Wherein, in the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it specifically includes: the pulse signal is the duration of the high level and the low level within one cycle; obtaining the comparison result of the high-level and low-level durations of the pulse signal compared to the previous cycle; determining the refrigerant flow characteristic identified by the pulse signal according to the comparison result. In the step of generating a control strategy for adjusting the operation of the compressor according to the pulse signal, it specifically further includes: determining that the refrigerant flow characteristic identified by the pulse signal is refrigerant leakage, and obtaining the suspected refrigerant type of the leaked refrigerant; generating a control strategy for adjusting the operation of the compressor according to the suspected refrigerant type. In the step of controlling the operation of the compressor according to the control strategy, it specifically includes: determining that the suspected refrigerant type is the first refrigerant type, and reducing the immediate operating frequency of the compressor to a first preset frequency, where the first preset frequency is the operating frequency of the compressor corresponding to when refrigerant leakage is slowed down; determining that the suspected refrigerant type is the second refrigerant type, and increasing the immediate operating frequency of the compressor to a second preset frequency, where the second preset frequency is the operating frequency of the compressor corresponding to when refrigerant leakage is slowed down.

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