Fault detection method and device for air conditioner chilled water valve, air conditioner and storage medium

Abstract

The present invention discloses a fault detection method, device, air conditioner and storage medium for a chilled water valve of an air conditioner. The method comprises: determining a target opening set for the chilled water valve; establishing a wireless communication connection with the chilled water valve and communicating; controlling the chilled water valve to act according to the set target opening; detecting the actual opening of the chilled water valve; judging whether the chilled water valve is faulty according to whether the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range: if the chilled water valve is judged to be faulty, a reminder message of the chilled water valve fault is initiated; if the chilled water valve is judged not to be faulty, communication with the chilled water valve is continued through a wireless communication connection. The scheme reduces the probability of the chilled water valve fault by establishing a wireless communication connection and determining the fault by the difference between the actual opening of the chilled water valve and the target opening, and at the same time more accurately and quickly finds the fault and reports it in time.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioners, and in particular relates to a method and device for detecting a fault of a chilled water valve of an air conditioner, an air conditioner and a storage medium. Background Art

[0002] The chilled water valve controls the flow of chilled water in the air conditioner, and plays a vital role in improving the refrigeration effect of the chilled water series air conditioner and the effective operation of the unit. In the actual production process, the water valve may rust due to unsuitable environment or being closed for too long, or be stuck by foreign objects, or the communication line or control line may be broken.

[0003] Failure of the chilled water valve results in the inability to transport chilled water normally and the inability to ensure constant refrigeration temperature. Blockage of the water valve will cause water accumulation in the equipment, affecting the production and operation of the unit. Failure of the chilled water valve poses certain safety hazards. Therefore, the study of an effective air conditioning chilled water valve fault detection system can make the air conditioner use better refrigeration effect and extend the life of the unit, which has become a problem that needs to be solved by the air conditioning unit.

[0004] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a fault detection method and device for an air-conditioning chilled water valve, an air conditioner and a storage medium, so as to solve the problems that the fault of the air-conditioning chilled water valve is difficult to detect, the maintenance is delayed due to inaccurate detection, and the air-conditioning unit has a poor operating effect. By determining whether the difference between the target opening and the actual opening of the chilled water valve is within a preset range, it is accurately determined whether the chilled water valve is faulty, and a maintenance reminder is given in time to ensure that the air-conditioning unit is stable in a better operating state.

[0006] The present invention provides a fault detection method for an air-conditioning chilled water valve, comprising: determining a target opening set for the chilled water valve; establishing a wireless communication connection with the chilled water valve; communicating with the chilled water valve through the wireless communication connection when the wireless communication connection with the chilled water valve is successfully established; controlling the chilled water valve to operate according to the set target opening; detecting the actual opening of the chilled water valve when the chilled water valve operates according to the set target opening; judging whether the chilled water valve is faulty based on whether a difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range: if the chilled water valve is judged to be faulty, initiating a reminder message of the chilled water valve fault; if the chilled water valve is judged to be not faulty, continuing to communicate with the chilled water valve through the wireless communication connection.

[0007] In some embodiments, establishing a wireless communication connection with the chilled water valve includes: initiating a request to establish a wireless communication connection to establish a wireless communication connection with the chilled water valve according to a preset communication key or pairing method; determining whether the wireless communication connection established with the chilled water valve is successful; if the wireless communication connection with the chilled water valve is successfully established, communicating with the chilled water valve via the wireless communication connection; if the wireless communication connection with the chilled water valve fails to be established, initiating a reminder message of the failure to establish the wireless communication connection.

[0008] In some embodiments, when the chilled water valve operates according to a set target opening, the actual opening of the chilled water valve is detected, including: detecting the displacement of the valve plate on the chilled water valve, the displacement of the valve plate being the radial sliding distance of the valve plate along the valve body, and obtaining a first opening based on a linear relationship between the displacement of the valve plate on the chilled water valve and the opening of the chilled water valve; detecting the chilled water flow rate through the chilled water valve, and obtaining a second opening based on a linear relationship between the chilled water flow rate and the opening of the chilled water valve; and determining the actual opening of the chilled water valve in combination with the first opening and the second opening.

[0009] In some embodiments, whether the chilled water valve is faulty is judged based on whether the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range, including: if the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within the preset range, determining that the chilled water valve is not faulty; if the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is not within the preset range, determining that the chilled water valve is faulty.

[0010] In some embodiments, the fault detection method of the chilled water valve further includes: while continuing to communicate with the chilled water valve via a wireless communication connection, when it is obtained that the chilled water valve is in a closed state, recording the duration of the chilled water valve being in the closed state; and controlling the action of the chilled water valve according to whether the duration is greater than or equal to a set anti-rust dead time.

[0011] In some embodiments, the action of the chilled water valve is controlled according to whether the duration is greater than or equal to the set anti-rust dead time, including: if the duration is greater than or equal to the set anti-rust dead time, the chilled water valve is controlled to open and reset; if the duration is less than the set anti-rust dead time, the chilled water valve is controlled to continue to remain closed.

[0012] In some embodiments, if the duration is greater than or equal to the set anti-rust dead time, the chilled water valve is controlled to open and reset, including: controlling the chilled water valve to open automatically; after the chilled water valve performs the automatic opening action, detecting whether the chilled water valve is opened successfully; if the chilled water valve opens successfully, controlling the chilled water valve to reset and close; if the chilled water valve fails to open, determining that the chilled water valve is faulty, and initiating a reminder message of the chilled water valve fault.

[0013] Matching the above method, the present invention provides a fault detection device for an air-conditioning chilled water valve on the other hand, comprising: a control unit, configured to determine a target opening set for the chilled water valve; the control unit is further configured to establish a wireless communication connection with the chilled water valve; the control unit is further configured to communicate with the chilled water valve through the wireless communication connection when the wireless communication connection with the chilled water valve is successfully established; the control unit is further configured to control the chilled water valve to operate according to the set target opening; the detection unit is configured to detect the actual opening of the chilled water valve when the chilled water valve operates according to the set target opening; the control unit is further configured to determine whether the chilled water valve is faulty based on whether the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range: if the chilled water valve is determined to be faulty, a reminder message of the chilled water valve fault is initiated; if the chilled water valve is determined to be not faulty, communication with the chilled water valve continues through the wireless communication connection.

[0014] In some embodiments, the control unit establishes a wireless communication connection with the chilled water valve, including: initiating a request to establish a wireless communication connection to establish a wireless communication connection with the chilled water valve according to a preset communication key or pairing method; determining whether the wireless communication connection established with the chilled water valve is successful; if the wireless communication connection with the chilled water valve is successfully established, communicating with the chilled water valve via the wireless communication connection; if the wireless communication connection with the chilled water valve fails to be established, initiating a reminder message of the failure to establish the wireless communication connection.

[0015] In some embodiments, the detection unit detects the actual opening of the chilled water valve when the chilled water valve operates according to the set target opening, including: detecting the displacement of the valve plate on the chilled water valve, the displacement of the valve plate being the radial sliding distance of the valve plate along the valve body, and obtaining a first opening based on the linear relationship between the displacement of the valve plate on the chilled water valve and the opening of the chilled water valve; detecting the chilled water flow rate passing through the chilled water valve, and obtaining a second opening based on the linear relationship between the chilled water flow rate and the opening of the chilled water valve; and determining the actual opening of the chilled water valve in combination with the first opening and the second opening.

[0016] In some embodiments, the control unit determines whether the chilled water valve is faulty based on whether the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range, including: if the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within the preset range, determining that the chilled water valve is not faulty; if the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is not within the preset range, determining that the chilled water valve is faulty.

[0017] In some embodiments, the fault detection device for the chilled water valve also includes: the control unit is further configured to record the duration of the chilled water valve being in the closed state when it is detected that the chilled water valve is in the closed state while continuing to communicate with the chilled water valve via a wireless communication connection; the control unit is further configured to control the action of the chilled water valve based on whether the duration is greater than or equal to a set anti-rust time.

[0018] In some embodiments, the control unit controls the action of the chilled water valve according to whether the duration is greater than or equal to the set anti-rust dead time, including: if the duration is greater than or equal to the set anti-rust dead time, controlling the chilled water valve to open and reset; if the duration is less than the set anti-rust dead time, controlling the chilled water valve to continue to remain in a closed state.

[0019] In some embodiments, the control unit controls the chilled water valve to open and reset if the duration is greater than or equal to the set anti-rust dead time, including: controlling the chilled water valve to open automatically; after the chilled water valve performs the automatic opening action, detecting whether the chilled water valve is opened successfully; if the chilled water valve opens successfully, controlling the chilled water valve to reset and close; if the chilled water valve fails to open, determining that the chilled water valve is faulty, and initiating a reminder message of the chilled water valve fault.

[0020] Matching the above-mentioned device, the present invention provides an air conditioner on another aspect, characterized by comprising: the above-mentioned air conditioner chilled water valve fault detection device.

[0021] In accordance with the above method, the present invention provides a storage medium on the other hand, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned method for detecting the fault of the air-conditioning chilled water valve.

[0022] Therefore, the scheme of the present invention establishes a wireless communication connection with the chilled water valve, controls the chilled water valve to operate according to the set target opening, detects the actual opening of the chilled water valve, and determines whether the chilled water valve is faulty based on the difference between the actual opening and the target opening, thereby avoiding failures caused by broken communication lines and control lines, and can detect faults in the chilled water valve more promptly and accurately, avoiding maintenance delays, so as to ensure that the air-conditioning unit is in a long-term efficient operation state.

[0023] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention.

[0024] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a flow chart of an embodiment of a method for detecting a fault of an air-conditioning chilled water valve of the present invention;

[0026] Figure 2 A schematic flow chart of an embodiment of establishing a wireless communication connection with a chilled water valve in a method for detecting a fault of an air conditioner chilled water valve of the present invention;

[0027] Figure 3 A flow chart of an embodiment of a method for detecting a fault of an air-conditioning chilled water valve according to the present invention;

[0028] Figure 4 A schematic diagram of the structure of a chilled water valve of an embodiment of a fault detection device for an air-conditioning chilled water valve of the present invention;

[0029] Figure 5 It is a structural schematic diagram of an embodiment of a fault detection device for an air-conditioning chilled water valve of the present invention;

[0030] Figure 6 The figure is a schematic diagram of a fault detection system of an air-conditioning chilled water valve according to an embodiment of the present invention.

[0031] In conjunction with the accompanying drawings, the reference numerals in the embodiments of the present invention are as follows:

[0032] 1-valve plate; 2-valve body; 102-control unit; 104-detection unit. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the specific embodiments of the present invention and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] Failure of the air conditioning chilled water valve will result in the inability to transport chilled water normally, and the inability to ensure constant refrigeration temperature, affecting the operation of the unit. These failures include the chilled water valve being rusted and unable to open freely due to an unsuitable environment and being in a closed state for a long time; foreign matter entering the chilled water valve and getting stuck, causing the valve to be at a certain opening and unable to be tightened; control lines or communication lines being broken and difficult for staff to detect, delaying maintenance time, resulting in poor operation of the air conditioning unit, etc. In related technologies, voltage feedback line detection or multimeter measurement of two-point resistance analysis is often used, but the disadvantages are inconvenient detection and easy and unstable lines.

[0035] Therefore, in order to prevent the rusting of the chilled water valve, detect the abnormal phenomenon of the chilled water valve more accurately, report the fault in time, and remind maintenance personnel to deal with the fault, the scheme of the present invention provides a fault detection method for an air-conditioning chilled water valve, by establishing a wireless communication connection with the chilled water valve, controlling the chilled water valve to operate according to a set target opening, detecting the actual opening of the chilled water valve, and judging whether the chilled water valve is faulty based on the difference between the actual opening and the target opening, thereby avoiding the fault of the communication line and the control line being broken, and being able to detect the fault problem of the chilled water valve more timely and accurately, avoiding maintenance delays, so as to ensure that the air-conditioning unit is in a state of high efficiency operation for a long time.

[0036] According to an embodiment of the present invention, a method for detecting a fault of an air conditioner chilled water valve is provided. Figure 1 The flowchart of an embodiment of the method of the present invention is shown in FIG. The fault detection method of the air conditioner chilled water valve comprises: steps S110 to S180.

[0037] In step S110, the target opening of the chilled water valve is determined. Specifically, the target opening of the chilled water valve is determined by a controller such as a single chip microcomputer.

[0038] In step S120, a wireless communication connection with the chilled water valve is established.

[0039] In some embodiments, it can be combined with Figure 2 The flowchart of an embodiment of establishing a wireless communication connection with the chilled water valve in the method of the present invention further illustrates the specific process of establishing a wireless communication connection with the chilled water valve in step S120, including: steps S210 to S240.

[0040] Step S210, initiating a request for establishing a wireless communication connection, so as to establish a wireless communication connection with the chilled water valve according to a preset communication key or pairing method.

[0041] Step S220, determining whether the wireless communication connection established with the chilled water valve is successful, and then executing step S230 or step S240.

[0042] Step S230: If the wireless communication connection with the chilled water valve is successfully established, communication with the chilled water valve is performed via the wireless communication connection.

[0043] Step S240: If the wireless communication connection with the chilled water valve fails to be established, a reminder message of the failure to establish the wireless communication connection is initiated.

[0044] Specifically, after power-on, a wireless communication connection can be established through Bluetooth. The controller microcontroller sends a set of fixed header code, parameter and check code data to another Bluetooth module on the water valve through a Bluetooth module. The parameter is the opening of the water valve, the check code is a string of randomly changing characters, and the fixed header code is a string of fixed characters. The fixed characters are used to prevent other devices from interfering with the connection when sending the same check code, thereby improving the connection accuracy. If the Bluetooth module on the water valve responds with the same header code, corresponding parameters and check code to the Bluetooth module on the microcontroller, it means that the wireless communication is successfully established; if the Bluetooth module on the water valve does not respond to data for a certain period of time such as 20 seconds after receiving the request data from the microcontroller, or the fixed header code and check code responded are incorrect, it means that the wireless communication fails to be established. The advantage of establishing a wireless communication connection with the chilled water valve through Bluetooth is that the use of Bluetooth can avoid the occurrence of poor contact between the wire and the running process wire, prevent the water valve from rusting, extend the life of the water valve, accurately judge the fault and give an alarm in time, and facilitate maintenance.

[0045] In step S130, when the wireless communication connection with the chilled water valve is successfully established, communication with the chilled water valve is performed via the wireless communication connection.

[0046] In step S140, the chilled water valve is controlled to operate according to the set target opening degree.

[0047] In step S150, when the chilled water valve operates according to the set target opening, the actual opening of the chilled water valve is detected. Specifically, the displacement of the valve plate 1 on the chilled water valve is detected, the displacement of the valve plate 1 being the distance that the valve plate 1 slides along the radial direction of the valve body 2, and the first opening is obtained according to the linear relationship between the displacement of the valve plate 1 on the chilled water valve and the opening of the chilled water valve; the chilled water flow through the chilled water valve is detected, and the second opening is obtained according to the linear relationship between the chilled water flow and the opening of the chilled water valve; and the actual opening of the chilled water valve is determined by combining the first opening and the second opening.

[0048] More specifically, if Figure 4 As shown, the air conditioning chilled water valve comprises a valve plate 1 and a valve body 2. The valve plate 1 slides on the valve body 2 to adjust the opening of the chilled water valve. In this embodiment, the displacement of the valve plate 1 on the chilled water valve is detected by a laser sensor. Figure 4 As shown, a laser sensor is embedded in the valve body 2 of the chilled water valve, and can be specifically set near the initial moving position of the valve plate 1 when it is from closed to open. The laser sensor uses the time of laser back and forth reflection and the speed of light to obtain the distance L between the laser sensor and the valve plate 1. The L collected by the laser sensor is divided by 2 to obtain the distance S between the laser sensor and the valve plate 1, that is, the displacement of the valve plate 1 on the chilled water valve. The opening X1 is obtained according to the linear relationship between the displacement S and the water valve opening. A flow sensor is also provided on the pipeline where the chilled water valve is located. The flow sensor is used to detect the chilled water flow V passing through the chilled water valve. The opening X2 is obtained according to the linear relationship between the chilled water flow V and the water valve opening. The opening X1 and the opening X2 are averaged to obtain the final actual opening X2. 实 .

[0049] At step S160, whether the chilled water valve is faulty is determined based on whether the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range: then step S170 or step S180 is executed. Specifically, the preset range can be customized according to demand. In this embodiment, the preset range is preferably within 5 degrees.

[0050] In some embodiments, if the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range, it is determined that the chilled water valve is not faulty; if the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is not within the preset range, it is determined that the chilled water valve is faulty.

[0051] At step S170, if it is determined that the chilled water valve is faulty, a reminder message of the chilled water valve fault is initiated;

[0052] In step S180, if it is determined that the chilled water valve is not faulty, communication with the chilled water valve is continued via a wireless communication connection.

[0053] The present invention proposes a method for detecting a fault of a chilled water valve, which can not only detect whether the chilled water valve is faulty during its operation, but also solve the problem that the chilled water valve becomes rusty and cannot be opened freely due to an unsuitable environment and being in a closed state for a long time.

[0054] In some embodiments, the fault detection method of the chilled water valve further includes: while continuing to communicate with the chilled water valve via a wireless communication connection, when it is obtained that the chilled water valve is in a closed state, recording the duration of the chilled water valve being in the closed state; and controlling the action of the chilled water valve according to whether the duration is greater than or equal to a set anti-rust dead time.

[0055] Specifically, if the duration is greater than or equal to the set anti-rust dead time, the chilled water valve is controlled to open and reset. In a specific embodiment, the chilled water valve is controlled to open automatically; after the chilled water valve performs the automatic opening action, it is detected whether the chilled water valve is opened successfully; if the chilled water valve is opened successfully, the chilled water valve is controlled to reset and close; if the chilled water valve fails to open, it is determined that the chilled water valve is faulty, and a reminder message of the chilled water valve fault is initiated.

[0056] If the duration is less than the set anti-rust dead time, the chilled water valve is controlled to remain in the closed state. Specifically, the anti-rust dead time can be customized. Preferably, the anti-rust dead time can be set to 14 days, that is, 336 hours. This time is conducive to avoiding the rust failure of the chilled water valve, and at the same time avoids the anti-rust dead time being set too short, and frequent opening and resetting will bring adverse effects to the air conditioning unit.

[0057] Figure 3 FIG. 1 is a flow chart of an embodiment of a method for detecting a fault of an air conditioning chilled water valve according to the present invention. Figure 3As shown, during the operation of the air-conditioning chilled water valve, the unit's single-chip microcomputer and the chilled water valve establish normal communication using the Bluetooth module; if normal communication cannot be established, the single-chip microcomputer sends an alarm command to the buzzer, and the buzzer alarms to remind the staff; according to the unit's refrigeration demand, the single-chip microcomputer transmits the chilled water valve opening size X (the range is 0-100, and the full deviation is 100) command to the chilled water valve through wireless transmission; the chilled water valve receives the opening command and actuates the valve plate 1. The laser sensor is embedded in the water valve. The laser has strong penetrability. By emitting laser and combining the back and forth reflection of the laser, the laser sensor collects the laser sensor data. The distance between the sensor and valve plate 1 is L. Since L is the distance of the laser back and forth reflection, the accurate distance between the laser sensor and valve plate 1 is S=L / 2. The laser sensor transmits the data S to the single-chip microcomputer, which uses the linear formula of valve plate 1 opening X' and S to obtain the actual opening X1. The flow sensor collects the cooling water flow V. According to multiple sets of data, the flow V and valve plate 1 opening X' are also characterized by a linear relationship. A set of data is counted to obtain their linear relationship formula, and the actual water valve opening X2 is obtained based on the linear relationship. The average value of X1 and X2 is the actual feedback opening X1 of the water valve. 实 =(X1+X2) / 2; actual feedback opening of the chilled water valve X 实 If the absolute value difference △X between the water valve opening X of the transmitted instruction is within the allowable error range, the water valve continues to operate. If it exceeds the error range, that is, there is a possibility that the valve plate 1 is rusted or stuck by foreign objects, the buzzer alarm is activated to remind the staff to repair.

[0058] Under the premise that the single-chip computer and the water valve continue to communicate normally and △X is within the allowable error range, the duration t of the water valve being in the closed state counted by the single-chip computer is compared with the anti-rust dead time T, t ≥ T, and the chilled water valve automatically opens for a period of time. If the opening fails, the buzzer alarm is activated. If the opening is successful, it automatically resets and closes, which can effectively prevent the water valve from being rusted and stuck due to long-term closure.

[0059] The present invention proposes a method for detecting a fault of an air-conditioning chilled water valve, which can detect the fault of the chilled water valve more accurately and efficiently, and can regularly open and reset the chilled water valve that has been in a closed state for a long time, thereby solving the problem that the chilled water valve becomes rusty and cannot be opened freely due to an unsuitable environment and being in a closed state for a long time.

[0060] By adopting the technical solution of this embodiment, a wireless communication connection is established with the chilled water valve, the chilled water valve is controlled to operate according to the set target opening, the actual opening of the chilled water valve is detected, and whether the chilled water valve is faulty is determined based on the difference between the actual opening and the target opening, thereby avoiding failures caused by broken communication lines and control lines, and being able to detect faults in the chilled water valve more promptly and accurately, avoiding maintenance delays, so that the air-conditioning unit can be in a state of high-efficiency operation for a long time.

[0061] According to an embodiment of the present invention, a fault detection device for an air-conditioning chilled water valve is also provided. Figure 5 and Figure 6 The flow chart of an embodiment of the device of the present invention is shown as follows. The fault detection device for the air-conditioning chilled water valve comprises: a control unit 102 and a detection unit 104 .

[0062] The control unit 102 is configured to determine the target opening of the chilled water valve. Specifically, the target opening of the chilled water valve is determined by a controller such as a single chip microcomputer. The specific functions and processing of the control unit 102 refer to step S110.

[0063] The control unit 102 is further configured to establish a wireless communication connection with the chilled water valve. The specific functions and processing of the control unit 102 refer to step S120.

[0064] The control unit 102 is further configured to initiate a request to establish a wireless communication connection, so as to establish a wireless communication connection with the chilled water valve according to a preset communication key or pairing method. The specific functions and processing of the control unit 102 refer to step S210.

[0065] The control unit 102 is further configured to determine whether the wireless communication connection established with the chilled water valve is successful. The specific functions and processing of the control unit 102 refer to step S220.

[0066] The control unit 102 is further configured to communicate with the chilled water valve via the wireless communication connection if the wireless communication connection with the chilled water valve is successfully established. The specific functions and processing of the control unit 102 refer to step S230.

[0067] The control unit 102 is further configured to initiate a reminder message of the failure to establish the wireless communication connection if the wireless communication connection with the chilled water valve fails to be established. The specific functions and processing of the control unit 102 refer to step S240.

[0068] Specifically, after power-on, a wireless communication connection can be established through Bluetooth. The controller microcontroller sends a set of fixed header code, parameter and check code data to another Bluetooth module on the water valve through a Bluetooth module. The parameter is the opening of the water valve, the check code is a string of randomly changing characters, and the fixed header code is a string of fixed characters. The fixed characters are used to prevent other devices from interfering with the connection when sending the same check code, thereby improving the connection accuracy. If the Bluetooth module on the water valve responds with the same header code, corresponding parameters and check code to the Bluetooth module on the microcontroller, it means that the wireless communication is successfully established; if the Bluetooth module on the water valve does not respond to data for a certain period of time such as 20 seconds after receiving the request data from the microcontroller, or the fixed header code and check code responded are incorrect, it means that the wireless communication fails to be established. A wireless communication connection can be established with the chilled water valve through the Bluetooth module. The advantage is that the use of the Bluetooth module can avoid the occurrence of poor contact between the wire and the running process wire, prevent the water valve from rusting, extend the life of the water valve, accurately judge the fault and give an alarm in time, and facilitate maintenance.

[0069] The control unit 102 is further configured to communicate with the chilled water valve via the wireless communication connection when the wireless communication connection with the chilled water valve is successfully established. The specific functions and processing of the control unit 102 refer to step S130.

[0070] The control unit 102 is further configured to control the chilled water valve to operate according to a set target opening degree. The specific functions and processing of the control unit 102 refer to step S140.

[0071] The detection unit 104 is configured to detect the actual opening of the chilled water valve when the chilled water valve operates according to the set target opening. Specifically, the displacement of the valve plate 1 on the chilled water valve is detected, the displacement of the valve plate 1 being the distance that the valve plate 1 slides along the radial direction of the valve body 2, and a first opening is obtained according to the linear relationship between the displacement of the valve plate 1 on the chilled water valve and the opening of the chilled water valve; the chilled water flow through the chilled water valve is detected, and a second opening is obtained according to the linear relationship between the chilled water flow and the opening of the chilled water valve; and the actual opening of the chilled water valve is determined in combination with the first opening and the second opening. The specific functions and processing of the detection unit 104 refer to step S150.

[0072] More specifically, if Figure 4 As shown, the air conditioning chilled water valve comprises a valve plate 1 and a valve body 2. The valve plate 1 slides on the valve body 2 to adjust the opening of the chilled water valve. In this embodiment, the displacement of the valve plate 1 on the chilled water valve is detected by a laser sensor. Figure 4As shown, a laser sensor is embedded in the valve body 2 of the chilled water valve, and can be specifically set near the initial moving position of the valve plate 1 when it is from closed to open. The laser sensor uses the time of laser back and forth reflection and the speed of light to obtain the distance L between the laser sensor and the valve plate 1. The L collected by the laser sensor is divided by 2 to obtain the distance S between the laser sensor and the valve plate 1, that is, the displacement of the valve plate 1 on the chilled water valve. The opening X1 is obtained according to the linear relationship between the displacement S and the water valve opening. A flow sensor is also provided on the pipeline where the chilled water valve is located. The flow sensor is used to detect the chilled water flow V passing through the chilled water valve. The opening X2 is obtained according to the linear relationship between the chilled water flow V and the water valve opening. The opening X1 and the opening X2 are averaged to obtain the final actual opening X2. 实 .

[0073] The control unit 102 is further configured to determine whether the chilled water valve is faulty according to whether the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range. Specifically, the preset range can be customized according to demand. In this embodiment, the preset range is preferably within 5 degrees. The specific functions and processing of the control unit 102 refer to step S160.

[0074] In some embodiments, if the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range, it is determined that the chilled water valve is not faulty; if the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is not within the preset range, it is determined that the chilled water valve is faulty.

[0075] The control unit 102 is further configured to initiate a reminder message of the chilled water valve failure if it is determined that the chilled water valve fails. The specific functions and processing of the control unit 102 refer to step S170.

[0076] The control unit 102 is further configured to, if it is determined that the chilled water valve is not faulty, continue to communicate with the chilled water valve via a wireless communication connection. The specific functions and processing of the control unit 102 refer to step S180.

[0077] The present invention proposes a fault detection device for a chilled water valve, which can not only detect whether the chilled water valve is faulty during its operation, but also solve the problem that the chilled water valve becomes rusty and cannot be opened freely due to an unsuitable environment and being in a closed state for a long time.

[0078] In some embodiments, the fault detection device for the chilled water valve further includes: while continuing to communicate with the chilled water valve via a wireless communication connection, when it is detected that the chilled water valve is in a closed state, recording the duration of the chilled water valve being in a closed state; and controlling the action of the chilled water valve according to whether the duration is greater than or equal to a set anti-rust time.

[0079] Specifically, if the duration is greater than or equal to the set anti-rust dead time, the chilled water valve is controlled to open and reset. In a specific embodiment, the chilled water valve is controlled to open automatically; after the chilled water valve performs the automatic opening action, it is detected whether the chilled water valve is opened successfully; if the chilled water valve is opened successfully, the chilled water valve is controlled to reset and close; if the chilled water valve fails to open, it is determined that the chilled water valve is faulty, and a reminder message of the chilled water valve fault is initiated.

[0080] If the duration is less than the set anti-rust dead time, the chilled water valve is controlled to remain in the closed state. Specifically, the anti-rust dead time can be customized. Preferably, the anti-rust dead time can be set to 14 days, that is, 336 hours. This time is conducive to avoiding the rust failure of the chilled water valve, and at the same time avoids the adverse effects of setting the anti-rust dead time too short and frequently opening and resetting the air conditioning unit.

[0081] Figure 6 FIG. 1 is a flow chart of an embodiment of a fault detection device for an air conditioning chilled water valve of the present invention. Figure 6 As shown, the fault detection device of the air-conditioning chilled water valve includes a buzzer, a single-chip microcomputer, a laser sensor, a chilled water valve, and a flow sensor. During the operation of the air-conditioning chilled water valve, the single-chip microcomputer of the unit and the chilled water valve establish normal communication using a Bluetooth module; if normal communication cannot be established, the single-chip microcomputer sends an alarm command to the buzzer, and the buzzer alarms to remind the staff; according to the refrigeration demand of the unit, the single-chip microcomputer transmits the opening size X (the range is 0-100, the full deviation is 100) of the chilled water valve to the chilled water valve through wireless transmission; the chilled water valve receives the opening command and actuates the valve plate 1. The laser sensor is embedded in the water valve. The laser has strong penetrability. By emitting laser and combining the back and forth reflection of the laser, the laser sensor collects the laser signal. The distance between the laser sensor and valve plate 1 is L, because L is the distance of laser reflection back and forth, so the accurate distance between the laser sensor and valve plate 1 is S=L / 2; the laser sensor transmits data S to the single-chip microcomputer, and the single-chip microcomputer uses the linear formula of valve plate 1 opening X' and S to obtain the actual opening X1; the flow sensor collects the cooling water flow V, and the flow V and valve plate 1 opening X' obtained from multiple sets of data are also characterized by a linear relationship. A set of data is counted to obtain their linear relationship formula, and the actual water valve opening X2 is obtained based on the linear relationship; the average value of X1 and X2 is the final actual feedback opening X1 of the water valve.实 =(X1+X2) / 2; actual feedback opening of the chilled water valve X 实 If the absolute value difference △X between the water valve opening X of the transmitted instruction is within the allowable error range, the water valve continues to operate. If it exceeds the error range, that is, there is a possibility that the valve plate 1 is rusted or stuck by foreign objects, the buzzer alarm is activated to remind the staff to repair.

[0082] Under the premise that the single-chip computer and the water valve continue to communicate normally and △X is within the allowable error range, the duration t of the water valve being in the closed state counted by the single-chip computer is compared with the anti-rust dead time T, t ≥ T, and the chilled water valve automatically opens for a period of time. If the opening fails, the buzzer alarm is activated. If the opening is successful, it automatically resets and closes, which can effectively prevent the water valve from being rusted and stuck due to long-term closure.

[0083] The present invention proposes a fault detection device for an air-conditioning chilled water valve, which can detect the fault of the chilled water valve more accurately and efficiently, and can regularly open and reset the chilled water valve that has been in a closed state for a long time, thereby solving the problem that the chilled water valve becomes rusty and cannot be opened freely due to an unsuitable environment and being in a closed state for a long time.

[0084] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0085] By adopting the technical solution of this embodiment, a wireless communication connection is established with the chilled water valve, the chilled water valve is controlled to move according to the set target opening, the actual opening of the chilled water valve is detected, and whether the chilled water valve is faulty is determined based on the difference between the actual opening and the target opening. This avoids failures caused by broken communication lines and control lines, reduces the probability of failures, accurately determines failures and promptly issues alarms, and facilitates maintenance.

[0086] According to an embodiment of the present invention, an air conditioner corresponding to a fault detection device for an air conditioner chilled water valve is also provided. The air conditioner may include the above-mentioned fault detection device for an air conditioner chilled water valve.

[0087] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0088] The technical solution of this embodiment is adopted to establish a wireless communication connection with the chilled water valve, control the chilled water valve to operate according to the set target opening, detect the actual opening of the chilled water valve, determine whether the chilled water valve is faulty based on the difference between the actual opening and the target opening, and provide timely feedback to avoid rusting of the water valve.

[0089] According to an embodiment of the present invention, a storage medium corresponding to a fault detection method for an air-conditioning chilled water valve is also provided, wherein the storage medium includes a stored program, wherein when the program is running, the device where the storage medium is located is controlled to execute the above-mentioned fault detection method for the air-conditioning chilled water valve.

[0090] Since the processing and functions implemented by the device of this embodiment basically correspond to the embodiments, principles and examples of the aforementioned method, for the details not fully described in this embodiment, please refer to the relevant descriptions in the aforementioned embodiments, and no further elaboration will be made here.

[0091] By adopting the technical solution of this embodiment, a wireless communication connection is established with the chilled water valve, the chilled water valve is controlled to operate according to the set target opening, the actual opening of the chilled water valve is detected, and whether the chilled water valve is faulty is determined based on the difference between the actual opening and the target opening. This avoids failures caused by broken communication lines and control lines, reduces the probability of failures, and extends the service life of the cooling water valve.

[0092] In summary, it is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0093] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for detecting a fault of an air conditioning chilled water valve, characterized in that: include: Determining a target opening of the chilled water valve; establishing a wireless communication connection with the chilled water valve; When the wireless communication connection with the chilled water valve is successfully established, communicating with the chilled water valve via the wireless communication connection; Controlling the chilled water valve to operate according to a set target opening degree; When the chilled water valve operates according to a set target opening, detecting an actual opening of the chilled water valve; Determine whether the chilled water valve is faulty according to whether the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range: If it is determined that the chilled water valve is faulty, a reminder message of the chilled water valve fault is sent; If it is determined that the chilled water valve is not faulty, continue to communicate with the chilled water valve via a wireless communication connection; Also includes: While continuing to communicate with the chilled water valve through the wireless communication connection, when it is obtained that the chilled water valve is in a closed state, recording the duration of the chilled water valve being in the closed state; According to whether the duration is greater than or equal to the set anti-rust dead time, the action of the chilled water valve is controlled; wherein, according to whether the duration is greater than or equal to the set anti-rust dead time, the action of the chilled water valve is controlled, including: if the duration is greater than or equal to the set anti-rust dead time, the chilled water valve is controlled to open and reset; if the duration is less than the set anti-rust dead time, the chilled water valve is controlled to continue to remain in a closed state; If the duration is greater than or equal to the set anti-rust dead time, the chilled water valve is controlled to open and reset, including: controlling the chilled water valve to open automatically; after the chilled water valve performs the automatic opening action, detecting whether the chilled water valve is opened successfully; if the chilled water valve is opened successfully, controlling the chilled water valve to reset and close; if the chilled water valve fails to open, determining that the chilled water valve is faulty, and initiating a reminder message of the chilled water valve fault.

2. The method for detecting a fault of an air conditioning chilled water valve according to claim 1, characterized in that: Establishing a wireless communication connection with the chilled water valve includes: Initiating a request to establish a wireless communication connection, so as to establish a wireless communication connection with the chilled water valve according to a preset communication key or pairing method; determining whether the wireless communication connection established with the chilled water valve is successful; If the wireless communication connection with the chilled water valve is successfully established, communicating with the chilled water valve via the wireless communication connection; If the wireless communication connection with the chilled water valve fails to be established, a reminder message of the failure to establish the wireless communication connection is initiated.

3. The method for detecting a fault of an air-conditioning chilled water valve according to claim 1 or 2, characterized in that: When the chilled water valve operates according to a set target opening, detecting the actual opening of the chilled water valve includes: Detecting the displacement of the valve plate (1) on the chilled water valve, the displacement of the valve plate (1) being the distance that the valve plate (1) slides radially along the valve body (2), and obtaining a first opening degree based on a linear relationship between the displacement of the valve plate (1) on the chilled water valve and the opening degree of the chilled water valve; Detecting the chilled water flow rate passing through the chilled water valve, and obtaining a second opening degree according to a linear relationship between the chilled water flow rate and the opening degree of the chilled water valve; The actual opening degree of the chilled water valve is determined in combination with the first opening degree and the second opening degree.

4. The method for detecting a fault of an air conditioning chilled water valve according to claim 3, characterized in that: Judging whether the chilled water valve is faulty according to whether a difference between a target opening of the chilled water valve and an actual opening of the chilled water valve is within a preset range includes: If the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range, it is determined that the chilled water valve is not faulty; If the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is not within a preset range, it is determined that the chilled water valve is faulty.

5. A fault detection device for an air-conditioning chilled water valve, characterized in that: include: A control unit configured to determine a target opening of the chilled water valve; The control unit is further configured to establish a wireless communication connection with the chilled water valve; The control unit is further configured to communicate with the chilled water valve via the wireless communication connection when the wireless communication connection with the chilled water valve is successfully established; The control unit is further configured to control the chilled water valve to operate according to a set target opening degree; A detection unit, configured to detect an actual opening of the chilled water valve when the chilled water valve operates according to a set target opening; The control unit is further configured to determine whether the chilled water valve is faulty according to whether a difference between a target opening of the chilled water valve and an actual opening of the chilled water valve is within a preset range: If it is determined that the chilled water valve is faulty, a reminder message of the chilled water valve fault is sent; If it is determined that the chilled water valve is not faulty, continue to communicate with the chilled water valve via a wireless communication connection; Also includes: The control unit is further configured to, while continuing to communicate with the chilled water valve via the wireless communication connection, record the duration of the chilled water valve being in the closed state when it is obtained that the chilled water valve is in the closed state; The control unit is further configured to control the action of the chilled water valve according to whether the duration is greater than or equal to the set anti-rust dead time; wherein the control unit controls the action of the chilled water valve according to whether the duration is greater than or equal to the set anti-rust dead time, including: if the duration is greater than or equal to the set anti-rust dead time, controlling the chilled water valve to open and reset; if the duration is less than the set anti-rust dead time, controlling the chilled water valve to continue to remain in a closed state; The control unit controls the chilled water valve to open and reset if the duration is greater than or equal to the set anti-rust dead time, including: controlling the chilled water valve to open automatically; after the chilled water valve performs the automatic opening action, detecting whether the chilled water valve is opened successfully; if the chilled water valve is opened successfully, controlling the chilled water valve to reset and close; if the chilled water valve fails to open, determining that the chilled water valve is faulty, and initiating a reminder message of the chilled water valve fault.

6. The fault detection device for an air-conditioning chilled water valve according to claim 5, characterized in that: The control unit establishes a wireless communication connection with the chilled water valve, including: Initiating a request to establish a wireless communication connection, so as to establish a wireless communication connection with the chilled water valve according to a preset communication key or pairing method; determining whether the wireless communication connection established with the chilled water valve is successful; If the wireless communication connection with the chilled water valve is successfully established, communicating with the chilled water valve via the wireless communication connection; If the wireless communication connection with the chilled water valve fails to be established, a reminder message of the failure to establish the wireless communication connection is initiated.

7. The fault detection device for an air-conditioning chilled water valve according to claim 5 or 6, characterized in that: The detection unit detects the actual opening of the chilled water valve when the chilled water valve operates according to the set target opening, including: Detecting the displacement of the valve plate (1) on the chilled water valve, the displacement of the valve plate (1) being the distance that the valve plate (1) slides radially along the valve body (2), and obtaining a first opening degree based on a linear relationship between the displacement of the valve plate (1) on the chilled water valve and the opening degree of the chilled water valve; Detecting the chilled water flow rate passing through the chilled water valve, and obtaining a second opening degree according to a linear relationship between the chilled water flow rate and the opening degree of the chilled water valve; The actual opening degree of the chilled water valve is determined in combination with the first opening degree and the second opening degree.

8. The fault detection device for an air-conditioning chilled water valve according to claim 7, characterized in that: The control unit determines whether the chilled water valve is faulty according to whether a difference between a target opening of the chilled water valve and an actual opening of the chilled water valve is within a preset range, including: If the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is within a preset range, it is determined that the chilled water valve is not faulty; If the difference between the target opening of the chilled water valve and the actual opening of the chilled water valve is not within a preset range, it is determined that the chilled water valve is faulty.

9. An air conditioner, characterized in that: include: A fault detection device for an air-conditioning chilled water valve according to any one of claims 5 to 8.

10. A storage medium, characterized in that: The storage medium includes a stored program, wherein when the program is executed, the device where the storage medium is located is controlled to execute the method for detecting a fault of an air-conditioning chilled water valve according to any one of claims 1 to 4.

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