Test method for car air pressure regulating device

Abstract

The present invention discloses a method for testing an elevator car air pressure regulating device. The elevator car air pressure regulating device includes a control device, a variable frequency fan, an air pressure regulator, a ventilation pipe, a differential pressure gauge, and a ventilation valve. The testing method comprises: step S1, testing the ventilation valve; step S2, testing the airtightness of the ventilation pipe and the elevator car; and step S3, testing the variable frequency fan and the air pressure regulator. The testing method of the present invention does not require maintenance tooling, significantly saving manpower and material resources during installation, commissioning, and maintenance. It can also clearly locate the fault type, making it easier for installers and commissioning personnel to troubleshoot the fault point.

Description

Technical Field

[0001] The present invention relates to the technical field of elevators, and in particular to a testing method for a car air pressure regulating device. Background Art

[0002] The air pressure regulating system includes a sealed car, an air pressure control device, an air pressure regulating device, and an air pressure detection and feedback device. The air pressure control device uses the real-time feedback air pressure value from the air pressure detection and feedback device to control the air pressure regulating device according to the air pressure target value at each operating position of the elevator, thereby achieving closed-loop control of the air pressure in the sealed car. There are many unavoidable air leakage locations in the sealed car, such as door gaps, floor sills, and air-conditioning outlets, which require regular maintenance to enhance the air tightness of the car. Therefore, a set of car airtightness self-inspection measures is required to ensure the reliable operation of the air pressure device of the high-speed elevator. The existing air pressure device system mostly adopts a manual adjustment mechanism in the maintenance mode, and lacks a systematic self-inspection process. Summary of the Invention

[0003] To solve the above technical problems, the present invention provides a method for testing a car air pressure regulating device, wherein the car air pressure regulating device includes a control device, a variable frequency fan, an air pressure regulator, a ventilation pipe, a differential pressure gauge, and a ventilation valve; the testing method includes:

[0004] Step S1, testing the ventilation valve;

[0005] Step S2, testing the airtightness of the ventilation pipe and the car;

[0006] Step S3: testing the variable frequency fan and the air pressure regulator.

[0007] Preferably, in step S1, the method for testing the ventilation valve is:

[0008] Step C1, the control device issues an instruction to open and close the ventilation valve once each;

[0009] Step C2, checking whether the ventilation valve contact is operating normally, if normal, proceed to step C3, otherwise proceed to step C5;

[0010] Step C3, detecting whether the action time of the ventilation valve contact change is within the preset time range. If it is within the preset time range, proceed to step C4; otherwise, proceed to step C5;

[0011] Step C4, outputting ventilation valve test pass information, and ending;

[0012] Step C5: Output the ventilation valve test failure information and end.

[0013] Preferably, in step S2, the method for testing the airtightness of the ventilation pipe and the car is:

[0014] Step A1, closing the ventilation valve;

[0015] Step A2, sending a fixed frequency drive signal to the variable frequency fan;

[0016] Step A3, setting the air pressure regulator to a pressurization or decompression mode;

[0017] Step A4, starting the variable frequency fan;

[0018] Step A5: After a preset time, determine whether the air pressure value fed back by the differential pressure gauge is constant. If so, proceed to step A6; otherwise, proceed to step A8.

[0019] Step A6, determining whether the air pressure value fed back by the differential pressure gauge is within a preset range, if so, proceeding to step A7, otherwise proceeding to step A8;

[0020] Step A7: Outputting information indicating that the ventilation duct and car airtightness tests have passed, and ending the process;

[0021] Step A8: Output information indicating that the ventilation duct and car airtightness test has failed, and the process ends.

[0022] Preferably, in step S3, the method for testing the variable frequency fan and the air pressure regulator is:

[0023] Step B1, closing the ventilation valve;

[0024] Step B2, the control device issues a given air pressure control curve;

[0025] Step B3, driving the variable frequency fan and the air pressure regulator to operate;

[0026] Step B4, calculating the difference between the pressure differential gauge feedback value and the given value of the air pressure control curve;

[0027] Step B5, determine whether the difference is within a preset range; if so, proceed to step B6, otherwise proceed to step B7;

[0028] Step B6: outputting information that the variable frequency fan and the air pressure regulator are fault-free, and ending;

[0029] Step B7: Output information about the failure of the variable frequency fan and the air pressure regulator, and end.

[0030] The present invention also provides a method for testing a car air pressure regulating device, which is used to test the airtightness of a ventilation pipe and a car, and comprises the following steps:

[0031] Step A1, closing the ventilation valve;

[0032] Step A2, sending a fixed frequency drive signal to the variable frequency fan;

[0033] Step A3, setting the air pressure regulator to a pressurization or decompression mode;

[0034] Step A4, starting the variable frequency fan;

[0035] Step A5: After a preset time, determine whether the air pressure value fed back by the differential pressure gauge is constant. If so, proceed to step A6; otherwise, proceed to step A8.

[0036] Step A6, determining whether the air pressure value fed back by the differential pressure gauge is within a preset range, if so, proceeding to step A7, otherwise proceeding to step A8;

[0037] Step A7: Outputting information indicating that the ventilation duct and car airtightness tests have passed, and ending the process;

[0038] Step A8: Output information indicating that the ventilation duct and car airtightness test has failed, and the process ends.

[0039] The present invention also provides a method for testing a car air pressure regulating device, which is used to test a variable frequency fan and an air pressure regulator, and comprises the following steps:

[0040] Step B1, closing the ventilation valve;

[0041] Step B2, the control device issues a given air pressure control curve;

[0042] Step B3, driving the variable frequency fan and the air pressure regulator to operate;

[0043] Step B4, calculating the difference between the pressure differential gauge feedback value and the given value of the air pressure control curve;

[0044] Step B5, determine whether the difference is within a preset range; if so, proceed to step B6, otherwise proceed to step B7;

[0045] Step B6: outputting information that the variable frequency fan and the air pressure regulator are fault-free, and ending;

[0046] Step B7: Output information about the failure of the variable frequency fan and the air pressure regulator, and end.

[0047] The present invention also provides a method for testing a car air pressure regulating device, which is used to test a ventilation valve and includes the following steps:

[0048] Step C1, the control device issues an instruction to open and close the ventilation valve once each;

[0049] Step C2, checking whether the ventilation valve contact is operating normally, if normal, proceed to step C3, otherwise proceed to step C5;

[0050] Step C3, detecting whether the action time of the ventilation valve contact change is within the preset time range. If it is within the preset time range, proceed to step C4; otherwise, proceed to step C5;

[0051] Step C4, outputting ventilation valve test pass information, and ending;

[0052] Step C5: Output the ventilation valve test failure information and end.

[0053] Compared with the existing technology, the testing method of the present invention does not require maintenance tooling, which greatly saves manpower and material resources in the installation, debugging and maintenance process. At the same time, it can clearly locate the fault type, making it easier for installers and debuggers to find the fault point. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0055] Figure 1 The present invention is a schematic structural diagram of a car air pressure regulating device. DETAILED DESCRIPTION

[0056] The following describes the implementation manner of the present invention through specific specific embodiments. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation manners, and the various details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that, in the absence of conflict, the following embodiments and the features in the embodiments can be combined with each other. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0057] Example 1

[0058] like Figure 1 As shown, the car air pressure regulating device includes a control device 1, a variable frequency fan 2, an air pressure regulator 3, a ventilation pipe 4, a differential pressure gauge 5 and ventilation valves 6 and 7.

[0059] The car air pressure regulating device is used to adjust the air pressure within the car 8. The basic process of air pressure regulation is as follows: before the car is in operation, the ventilation valve is closed to ensure the airtightness of the car. Because elevators with air pressure regulating devices require a strong airtightness of the car, the ventilation valve must be opened when the car is not in operation to ensure air circulation.

[0060] 2. The differential pressure gauge serves as an air pressure collection device and a feedback link for the control device. It collects the pressure difference between the inside and outside of the car in real time and sends it to the control device.

[0061] 3. The control device sets the air pressure control curve based on the elevator's operating position. Based on feedback from the differential pressure gauge, it drives the variable-frequency fan to deliver the appropriate air volume. It also controls the air pressure regulator in real time, adjusting the pressure inside the car for each position during operation. The air output by the fan is delivered or extracted to the car through a sealed ventilation duct, achieving real-time regulation of the air pressure inside the car.

[0062] In order to ensure the reliability of the above-mentioned operation process, this embodiment provides a test method for a car air pressure regulating device, which is used to test the airtightness of the ventilation pipe and the car, including the following steps:

[0063] Step A1, closing the ventilation valve;

[0064] Step A2, sending a fixed frequency drive signal to the variable frequency fan;

[0065] Step A3, setting the air pressure regulator to a pressurization or decompression mode;

[0066] Step A4, starting the variable frequency fan;

[0067] Step A5: After a preset time, determine whether the air pressure value fed back by the differential pressure gauge is constant. If so, proceed to step A6; otherwise, proceed to step A8.

[0068] Step A6, determining whether the air pressure value fed back by the differential pressure gauge is within a preset range, if so, proceeding to step A7, otherwise proceeding to step A8;

[0069] Step A7: Outputting information indicating that the ventilation duct and car airtightness tests have passed, and ending the process;

[0070] Step A8: Output information indicating that the ventilation duct and car airtightness test has failed, and the process ends.

[0071] Example 2

[0072] The test method for the car air pressure regulating device provided in this embodiment is used to test whether the variable frequency fan and the air pressure regulator are working properly. This test can be performed after the test in Example 1 is passed, or it can be performed independently after confirming that the ventilation duct and the car are well sealed. The test method of this embodiment includes the following steps:

[0073] Step B1, closing the ventilation valve;

[0074] Step B2, the control device issues a given air pressure control curve;

[0075] Step B3, driving the variable frequency fan and the air pressure regulator to operate;

[0076] Step B4, calculating the difference between the pressure differential gauge feedback value and the given value of the air pressure control curve;

[0077] Step B5, determine whether the difference is within a preset range; if so, proceed to step B6, otherwise proceed to step B7;

[0078] Step B6: outputting information that the variable frequency fan and the air pressure regulator are fault-free, and ending;

[0079] Step B7: Output information about the failure of the variable frequency fan and the air pressure regulator, and end.

[0080] Example 3

[0081] The test method of the car air pressure regulating device provided in this embodiment is used to test the ventilation valve, and specifically includes the following steps:

[0082] Step C1, the control device issues an instruction to open and close the ventilation valve once each;

[0083] Step C2, checking whether the ventilation valve contact is operating normally, if normal, proceed to step C3, otherwise proceed to step C5;

[0084] Step C3, detecting whether the action time of the ventilation valve contact change is within the preset time range. If it is within the preset time range, proceed to step C4; otherwise, proceed to step C5;

[0085] Step C4, outputting ventilation valve test pass information, and ending;

[0086] Step C5: Output the ventilation valve test failure information and end.

[0087] Example 4

[0088] This embodiment combines the test methods of the above embodiments 1 to 3, and the steps are as follows:

[0089] Step S1, testing the ventilation valve;

[0090] Step S2, testing the airtightness of the ventilation pipe and the car;

[0091] Step S3: testing the variable frequency fan and the air pressure regulator.

[0092] The present invention has been described in detail above by way of specific embodiments and examples, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may make many variations and improvements, which should also be considered within the scope of protection of the present invention.

Claims

1. A method for testing a car air pressure regulating device, wherein the car air pressure regulating device comprises a control device, a variable frequency fan, an air pressure regulator, a ventilation pipe, a differential pressure gauge and a ventilation valve; characterized in that: The test method includes: Step S1, testing the ventilation valve; Step S2, testing the airtightness of the ventilation pipe and the car; Step S3, testing the variable frequency fan and the air pressure regulator; In step S1, the method for testing the ventilation valve is as follows: Step C1, the control device issues an instruction to open and close the ventilation valve once each; Step C2, checking whether the ventilation valve contact is operating normally, if normal, proceed to step C3, otherwise proceed to step C5; Step C3, detecting whether the action time of the ventilation valve contact change is within the preset time range. If it is within the preset time range, proceed to step C4; otherwise, proceed to step C5; Step C4, outputting ventilation valve test pass information, and ending; Step C5: Outputting information indicating that the ventilation valve test has failed, and ending the process; In step S2, the method for testing the airtightness of the ventilation pipe and the car is as follows: Step A1, closing the ventilation valve; Step A2, sending a fixed frequency drive signal to the variable frequency fan; Step A3, setting the air pressure regulator to a pressurization or decompression mode; Step A4, starting the variable frequency fan; Step A5: After a preset time, determine whether the air pressure value fed back by the differential pressure gauge is constant. If so, proceed to step A6; otherwise, proceed to step A8. Step A6, determining whether the air pressure value fed back by the differential pressure gauge is within a preset range, if so, proceeding to step A7, otherwise proceeding to step A8; Step A7: Outputting information indicating that the ventilation duct and car airtightness tests have passed, and ending the process; Step A8: Outputting information indicating that the ventilation duct and car airtightness tests have failed, and ending the process; In step S3, the method for testing the variable frequency fan and the air pressure regulator is as follows: Step B1, closing the ventilation valve; Step B2, the control device issues a given air pressure control curve; Step B3, driving the variable frequency fan and the air pressure regulator to operate; Step B4, calculating the difference between the pressure differential gauge feedback value and the given value of the air pressure control curve; Step B5, determine whether the difference is within a preset range; if so, proceed to step B6, otherwise proceed to step B7; Step B6: outputting information that the variable frequency fan and the air pressure regulator are fault-free, and ending; Step B7: Output information about the failure of the variable frequency fan and the air pressure regulator, and end.

Images