Fault diagnosis system and method suitable for excavator air conditioning system and excavator

Abstract

The invention provides a fault diagnosis system and method suitable for an air conditioning system of an excavator and the excavator. The system comprises an acquisition module used for acquiring real-time operation parameters of the air conditioning system; the analysis module is used for comparing the real-time operation parameters of the air conditioning system with rated parameters of the air conditioning system in a refrigeration mode to obtain the operation state of the air conditioning system; and the output module is used for outputting the operation state of the air conditioning system and outputting an alarm signal when the air conditioning system has an operation fault. According to the fault diagnosis system, the real-time operation state of the air conditioner system is obtained by analyzing the real-time operation parameters of the air conditioner system and the rated parameters of the air conditioner system, so that whether the air conditioner has operation faults or not is judged, and the fault diagnosis system can timely and quickly feed back the air conditioner faults; and greater damage to the excavator caused by continuous operation in a fault state is avoided.

Description

Technical Field

[0001] The invention relates to a fault diagnosis system and method applicable to an excavator air conditioning system and an excavator, belonging to the technical field of air conditioning. Background Art

[0002] The working environment of excavators is harsh, and the air-conditioning system is prone to operational failures. When the existing excavator air-conditioning system reports a fault, the driver needs to report it to the local customer service staff. The customer service staff will arrive at the customer site to troubleshoot the problem, wasting a lot of time and manpower and material resources. In addition, due to the uneven technical levels of the customer service staff, there is a problem of low accuracy in air-conditioning fault diagnosis. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a fault diagnosis system, method and excavator suitable for an excavator air conditioning system, thereby solving the problem of low accuracy in existing air conditioning fault diagnosis.

[0004] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0005] In a first aspect, the present invention provides a fault diagnosis system applicable to an excavator air conditioning system, comprising:

[0006] Acquisition module: used to obtain real-time operating parameters of the air-conditioning system;

[0007] Analysis module: used for obtaining the operation status of the air-conditioning system by comparing the real-time operation parameters of the air-conditioning system with the rated parameters of the air-conditioning system in the cooling mode; the operation status includes: normal operation and operation failure;

[0008] Output module: used to output the operating status of the air-conditioning system and output an alarm signal when the air-conditioning system fails.

[0009] In combination with the first aspect, optionally, the acquisition module includes: a first acquisition unit arranged at the compressor exhaust port and a second acquisition unit arranged at the compressor intake port; the first acquisition unit is used to obtain real-time parameters of the compressor exhaust port; the second acquisition unit is used to obtain real-time parameters of the compressor intake port.

[0010] In combination with the first aspect, optionally, the analysis module is further used to analyze and obtain the cause of the fault in the fault state; the output module is further used to output the cause of the fault of the air conditioning system; the cause of the fault includes: failure of the high and low pressure cavity seals of the compressor, air in the system refrigerant, and the expansion valve opening is too large; the real-time operating parameters of the air conditioning system include: compressor exhaust port pressure , Compressor suction pressure and compressor suction temperature .

[0011] The analyzing and obtaining the cause of the fault in the fault state includes:

[0012] like and , it is determined that the cause of the air conditioning system failure is the failure of the high and low pressure cavity seals of the compressor;

[0013] like and ,and , then it is determined that the cause of the air conditioning system failure is that there is air in the system refrigerant;

[0014] like and ,and , it is determined that the cause of the air conditioning system failure is that the expansion valve opening is too large;

[0015] in, is the rated pressure of the compressor exhaust port, is the rated pressure of the compressor suction port, Rated temperature of the compressor suction port.

[0016] In combination with the first aspect, optionally, the acquisition module further includes: a third acquisition unit, the third acquisition unit is arranged at the condenser outlet, and is used to obtain real-time parameters of the condenser outlet; the real-time operating parameters of the air conditioning system also include: condenser outlet pressure The cause of the failure also includes: the expansion valve opening is too small.

[0017] The analyzing and obtaining the cause of the fault in the fault state also includes: if and ,and , it is determined that the cause of the air conditioning system failure is that the expansion valve opening is too small; among them, It is the rated pressure of condenser outlet.

[0018] In combination with the first aspect, optionally, the second acquisition unit is a temperature and pressure sensor.

[0019] In a second aspect, the present invention provides a fault diagnosis method applicable to an excavator air-conditioning system, adopting the fault diagnosis system as described in the first aspect, the method comprising: obtaining real-time operating parameters of the air-conditioning system in refrigeration mode; comparing the real-time operating parameters of the air-conditioning system with the rated parameters of the air-conditioning system to obtain the operating status of the air-conditioning system; in response to the air-conditioning system operating normally, outputting "normal operation"; in response to an operating failure of the air-conditioning system, outputting "operation failure" and an alarm signal.

[0020] In conjunction with the second aspect, optionally, the real-time operating parameters of the air conditioning system include: compressor exhaust pressure , Compressor suction pressure and compressor suction temperature The method further includes: in response to an operating failure of the air conditioning system, analyzing and obtaining the cause of the failure, including:

[0021] In response to and , then the output is "compressor high and low pressure cavity seal failure";

[0022] In response to and ,and , then the output is "there is air in the system refrigerant";

[0023] In response to and ,and , then the output is "the expansion valve opening is too large";

[0024] in, is the rated pressure of the compressor exhaust port, is the rated pressure of the compressor suction port, Rated temperature of the compressor suction port.

[0025] In combination with the second aspect, optionally, the real-time operating parameters of the air conditioning system also include: condenser outlet pressure ;

[0026] The analyzing and obtaining the fault cause also includes: responding to and ,and , then the output is "expansion valve opening is too small"; where, It is the rated pressure of condenser outlet.

[0027] In a third aspect, the present invention provides an excavator, wherein the excavator is equipped with the fault diagnosis system as described in the first aspect.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The fault diagnosis system provided by the present invention obtains the real-time operating status of the air-conditioning system by analyzing the real-time operating parameters of the air-conditioning system and the rated parameters of the air-conditioning system, thereby determining whether the air-conditioning system has an operating fault. This fault diagnosis system can promptly and quickly feedback the air-conditioning fault, thereby preventing the excavator from being further damaged by continued operation in a faulty state.

[0030] (2) The fault diagnosis method provided by the present invention can quickly obtain the cause of the air-conditioning system failure by comparing the compressor exhaust pressure, compressor suction pressure, compressor suction temperature and condenser outlet pressure with the corresponding rated values, thereby greatly shortening the time for air-conditioning customer service personnel to perform fault investigation and saving a lot of manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a logic diagram of the air conditioning system fault diagnosis method provided in Example 2 of the present invention. DETAILED DESCRIPTION

[0032] The terms "first", "second", "third", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices. The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments.

[0033] Example 1

[0034] The present invention provides a fault diagnosis system applicable to an excavator air conditioning system, comprising:

[0035] Acquisition module: used to obtain real-time operating parameters of the air conditioning system.

[0036] Analysis module: used for obtaining the operation status of the air-conditioning system by comparing the real-time operation parameters of the air-conditioning system with the rated parameters of the air-conditioning system in the cooling mode; the operation status includes: normal operation and operation failure;

[0037] Output module: used to output the operating status of the air-conditioning system and output an alarm signal when the air-conditioning system fails.

[0038] In some specific embodiments, the acquisition module includes a first acquisition unit and a second acquisition unit; the first acquisition unit is arranged at the compressor exhaust port, and is used to obtain the real-time parameters of the compressor exhaust port; the second acquisition unit is arranged at the compressor intake port, and is used to obtain the real-time parameters of the compressor intake port.

[0039] The fault diagnosis system provided by the present invention obtains the real-time operating status of the air-conditioning system by analyzing the real-time operating parameters of the air-conditioning system and the rated parameters of the air-conditioning system. This fault diagnosis system can promptly and quickly feedback air-conditioning faults to avoid further damage to the excavator caused by continued operation under a faulty state.

[0040] In some specific embodiments, the analysis module is also used to analyze and obtain the cause of the fault in a fault state; at the same time, the output module is also used to output the cause of the fault of the air-conditioning system.

[0041] The real-time operating parameters of the air conditioning system include: compressor exhaust pressure , Compressor suction pressure and compressor suction temperature .

[0042] In these embodiments, analyzing and obtaining the cause of the fault in the fault state includes:

[0043] like and , it is determined that the cause of the air conditioning system failure is the failure of the high and low pressure cavity seals of the compressor;

[0044] like and ,and , then it is determined that the cause of the air conditioning system failure is that there is air in the system refrigerant;

[0045] like and ,and , it is determined that the cause of the air conditioning system failure is that the expansion valve opening is too large;

[0046] in, is the rated pressure of the compressor exhaust port, is the rated pressure of the compressor suction port, Rated temperature of the compressor suction port.

[0047] In some specific embodiments, the acquisition module further includes: a third acquisition unit disposed at the outlet of the condenser, for acquiring real-time parameters of the outlet of the condenser.

[0048] Correspondingly, the real-time operating parameters of the air conditioning system also include: condenser outlet pressure .

[0049] Accordingly, in the fault state, analyzing and obtaining the fault cause also includes: if and ,and , it is determined that the cause of the air conditioning system failure is that the expansion valve opening is too small; among them, It is the rated pressure of condenser outlet.

[0050] In some specific embodiments, the second acquisition unit is used to acquire both temperature and pressure values, and a temperature and pressure sensor is selected.

[0051] The first acquisition unit and the third acquisition unit may use a temperature and pressure sensor or a pressure sensor.

[0052] Example 2

[0053] This embodiment provides a fault diagnosis method applicable to an excavator air conditioning system, using the fault diagnosis system described in Embodiment 1.

[0054] The method includes: obtaining real-time operating parameters of an air-conditioning system in a cooling mode; comparing the real-time operating parameters of the air-conditioning system with rated parameters of the air-conditioning system to obtain the operating status of the air-conditioning system; in response to the air-conditioning system operating normally, outputting "normal operation"; in response to the air-conditioning system operating fault, outputting "operation fault" and outputting an alarm signal.

[0055] In some specific embodiments, the real-time operating parameters of the air conditioning system include: compressor exhaust pressure , Compressor suction pressure and compressor suction temperature .

[0056] like Figure 1 As shown, in these embodiments, the method further includes: in response to an operating failure of the air conditioning system, analyzing and obtaining a cause of the failure, including:

[0057] In response to and , then the output is "compressor high and low pressure cavity seal failure";

[0058] In response to and ,and , then the output is "there is air in the system refrigerant";

[0059] In response to and ,and , then the output is "the expansion valve opening is too large";

[0060] in, is the rated pressure of the compressor exhaust port, is the rated pressure of the compressor suction port, Rated temperature of the compressor suction port.

[0061] In some specific embodiments, the real-time operating parameters of the air conditioning system also include: condenser outlet pressure .

[0062] In these embodiments, Figure 1 As shown, analyzing and obtaining the cause of the fault also includes: responding to and ,and , then the output is "expansion valve opening is too small"; where, It is the rated pressure of condenser outlet.

[0063] Example 3

[0064] This embodiment provides an excavator, which is equipped with the fault diagnosis system as described in Example 1.

[0065] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A fault diagnosis system for an excavator air conditioning system, characterized in that: include: Acquisition module: used to obtain real-time operating parameters of the air conditioning system. Analysis module: used for obtaining the operation status of the air-conditioning system by comparing the real-time operation parameters of the air-conditioning system with the rated parameters of the air-conditioning system in the cooling mode, wherein the operation status includes: normal operation and operation failure; Output module: used to output the operating status of the air-conditioning system and output an alarm signal when the air-conditioning system fails.

2. The fault diagnosis system according to claim 1, characterized in that: The collection module comprises: a first collection unit arranged at the exhaust port of the compressor and a second collection unit arranged at the intake port of the compressor; The first acquisition unit is used to obtain real-time parameters of the compressor exhaust port; The second acquisition unit is used to obtain real-time parameters of the compressor suction port.

3. The fault diagnosis system according to claim 2, characterized in that: The analysis module is also used to analyze and obtain the cause of the fault in the fault state; the output module is also used to output the cause of the fault of the air conditioning system; The causes of the failure include: failure of the compressor high and low pressure cavity seals, air in the system refrigerant, and the expansion valve opening is too large; The real-time operating parameters of the air conditioning system include: compressor exhaust pressure , Compressor suction pressure and compressor suction temperature ; The analyzing and obtaining the cause of the fault in the fault state includes: like and , it is determined that the cause of the air conditioning system failure is the failure of the high and low pressure cavity seals of the compressor; like and ,and , then it is determined that the cause of the air conditioning system failure is that there is air in the system refrigerant; like and ,and , it is determined that the cause of the air conditioning system failure is that the expansion valve opening is too large; in, is the rated pressure of the compressor exhaust port, is the rated pressure of the compressor suction port, Rated temperature of the compressor suction port.

4. The fault diagnosis system according to claim 3, characterized in that: The acquisition module further includes: a third acquisition unit, which is arranged at the outlet of the condenser and is used to acquire real-time parameters of the outlet of the condenser; The real-time operating parameters of the air conditioning system also include: condenser outlet pressure ; The causes of the failure also include: the expansion valve opening is too small; The analyzing and obtaining the cause of the fault in the fault state also includes: like and ,and , it is determined that the cause of the air conditioning system failure is that the expansion valve opening is too small; among them, It is the rated pressure of condenser outlet.

5. The fault diagnosis system according to claim 3, characterized in that: The second acquisition unit is a temperature and pressure sensor.

6. A fault diagnosis method for an excavator air conditioning system, characterized in that: Using the fault diagnosis system according to any one of claims 1 to 5, the method comprises: Get the real-time operating parameters of the air-conditioning system in cooling mode; Comparing the real-time operating parameters of the air conditioning system with the rated parameters of the air conditioning system to obtain the operating status of the air conditioning system; In response to the air conditioning system operating normally, output "operating normally"; In response to an operating failure of the air conditioning system, "operation failure" is output and an alarm signal is output.

7. The fault diagnosis method according to claim 6, characterized in that: The real-time operating parameters of the air conditioning system include: compressor exhaust pressure , Compressor suction pressure and compressor suction temperature ; The method further includes: in response to an operation failure of the air conditioning system, analyzing and obtaining a cause of the failure, including: In response to and , then the output is "compressor high and low pressure cavity seal failure"; In response to and ,and , then the output is "there is air in the system refrigerant"; In response to and ,and , then the output is "expansion valve opening too large"; in, is the rated pressure of the compressor exhaust port, is the rated pressure of the compressor suction port, Rated temperature of the compressor suction port.

8. The fault diagnosis method according to claim 7, characterized in that: The real-time operating parameters of the air conditioning system also include: condenser outlet pressure ; The analysis to obtain the cause of the failure also includes: In response to and ,and , then the output is "expansion valve opening is too small"; in, It is the rated pressure of condenser outlet.

9. An excavator, characterized in that: The excavator is equipped with the fault diagnosis system according to any one of claims 1-5.

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