CN221056071U - Test fixture for rail transit air conditioner - Google Patents

Abstract

The utility model discloses a test fixture for a rail transit air conditioner, which comprises: the system comprises a pressure acquisition module, a temperature acquisition module, an electrical interface and a display terminal; the input ends of the pressure acquisition module and the temperature acquisition module are connected with the rail intersection air conditioner through an electrical interface, and the output ends of the pressure acquisition module and the temperature acquisition module are connected with the display terminal. Compared with the prior art, the temperature parameter and the pressure parameter are acquired through the temperature acquisition module and the pressure acquisition module and recorded and displayed through the display terminal, the temperature sensor resistance value is measured without an operator using a universal meter alone, the temperature parameter is obtained through table lookup, the rail traffic air conditioner pressure is measured by using a pressure meter alone, the testing efficiency is improved, the temperature parameter and the pressure parameter are obtained through electrical equipment, the testing accuracy is improved, the operator can carry out more accurate and comprehensive maintenance on the rail traffic air conditioner, and therefore the stability of the following rail traffic air conditioner in operation is improved.

Description

Test fixture for rail transit air conditioner

Technical Field

The utility model relates to the technical field of air conditioners, in particular to a test fixture for a rail transit air conditioner.

Background

The rail transit air conditioning system needs to be regularly maintained in the use process. In the existing system, the maintenance scheme of the rail transit air conditioning system is that a professional uses a digital multimeter to measure the resistance value of a temperature sensor, then the corresponding temperature information is obtained according to the table lookup of the resistance value, the pressure of the air conditioning system is measured by using a pressure gauge, and then the superheat degree is calculated by searching a comparison table, so that the air conditioning system is maintained according to data.

In the process of implementing the present utility model, the inventor finds that at least the following problems exist in the prior art:

The test flow of the scheme is relatively complicated, the efficiency is low, and the manual operation has high error rate, so that the operation stability of the subsequent rail transit air conditioning system can be influenced.

Disclosure of utility model

Therefore, the utility model aims to provide a testing tool for an air conditioner for rail transit, which can improve the testing efficiency and the accuracy.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

A test fixture for a rail transit air conditioner comprises: the system comprises a pressure acquisition module, a temperature acquisition module, an electrical interface and a display terminal;

The input ends of the pressure acquisition module and the temperature acquisition module are connected with the rail transit air conditioner through the electrical interface, and the output ends of the pressure acquisition module and the temperature acquisition module are connected with the display terminal;

The pressure acquisition module is used for acquiring pressure parameters of the rail transit air conditioner when the rail transit air conditioner operates; the temperature acquisition module is used for acquiring temperature parameters of the rail traffic air conditioner when the rail traffic air conditioner operates and acquiring temperature parameters in a refrigerating environment of the rail traffic air conditioner when the rail traffic air conditioner operates;

The display terminal is used for recording and displaying the pressure parameters acquired by the pressure acquisition module and the temperature parameters acquired by the temperature acquisition module.

Further, the temperature acquisition module comprises a PT temperature acquisition module and/or an NTC temperature acquisition module;

the electrical interface is a fast-inserting terminal row.

Furthermore, data interaction is realized between the temperature acquisition module and the display terminal and between the pressure acquisition module and the display terminal in a 485 communication mode.

Further, the device also comprises a shell;

The temperature acquisition module, the pressure acquisition module and the electrical interface are all arranged in the shell;

the housing is provided with a first opening, the electrical interface is provided with a socket, and the socket extends out of the housing through the first opening.

Further, the display terminal is arranged in the shell;

The display terminal comprises a display screen, a second opening is formed in the shell, and the display screen can extend out of the shell through the second opening.

Further, the device also comprises a power supply;

the display terminal, the temperature acquisition module and the pressure acquisition module are all connected with the power supply, and the power supply supplies power for the display terminal, the temperature acquisition module and the pressure acquisition module.

Further, the processor of the display terminal comprises a calculation module, a calculation formula or a calculation model of the superheat degree of the rail transit air conditioner is preset in the calculation module, and the calculation result of the calculation module is recorded and displayed through the display terminal.

Further, the processor is provided with a storage module, and a display page of the rail transit air conditioner with various models is configured in the storage module.

Further, the system also comprises an alarm module;

And the warning module is internally preset with a superheat parameter interval of the rail transit air conditioner, and can warn when the calculation result of the calculation module is inconsistent with the preset superheat parameter interval.

Further, the temperature acquisition module and the pressure acquisition module are respectively provided with an independently arranged control module;

The control module can control the temperature acquisition module and the pressure acquisition module to be matched with the model of the rail transit air conditioner.

Compared with the prior art, the testing tool for the rail transit air conditioner has the following advantages:

The utility model provides a test fixture for a rail transit air conditioner, which comprises: the system comprises a pressure acquisition module, a temperature acquisition module, an electrical interface and a display terminal; the input ends of the pressure acquisition module and the temperature acquisition module are connected with the rail transit air conditioner through the electrical interface, and the output ends of the pressure acquisition module and the temperature acquisition module are connected with the display terminal; the pressure acquisition module is used for acquiring pressure parameters of the rail transit air conditioner when the rail transit air conditioner operates; the temperature acquisition module is used for acquiring temperature parameters of the rail traffic air conditioner when the rail traffic air conditioner operates and acquiring temperature parameters in a refrigerating environment of the rail traffic air conditioner when the rail traffic air conditioner operates; the display terminal is used for recording and displaying the pressure parameters acquired by the pressure acquisition module and the temperature parameters acquired by the temperature acquisition module.

The temperature parameter and the pressure parameter can be recorded and displayed through the display terminal by setting the temperature acquisition module to acquire the temperature parameter during the running of the rail transit air conditioner and setting the pressure acquisition module to acquire the pressure parameter during the running of the rail transit air conditioner. Compared with the prior art, only need insert the test fixture in the rail cross air conditioner through electrical interface and the operation rail cross air conditioner can, need not operating personnel and use the universal meter alone to measure temperature sensor's resistance, and look up table obtain temperature parameter, and use the manometer alone to measure rail cross air conditioner pressure, the test flow has been simplified, the efficiency of test has been improved, the maintenance cost is lower, and, obtain temperature parameter and pressure parameter through electrical equipment, can avoid the error rate that manual operation brought, the test accuracy rate has been improved, make operating personnel can carry out more accurate, comprehensive maintenance to the rail cross air conditioner, thereby stability when helping improving follow-up rail cross air conditioner operation.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a test fixture for an air conditioner for rail transit provided by an embodiment of the utility model;

fig. 2 is an electrical schematic diagram of a test fixture for an air conditioner for rail transit provided by an embodiment of the utility model;

fig. 3 is a schematic view of a display page of the display screen.

Icon: 11-a temperature acquisition module; a 111-PT temperature acquisition module; 112-NTC temperature acquisition module; 12-a pressure acquisition module; 13-an electrical interface; 14-a display terminal; 15-a shell.

Detailed Description

The technical solutions of the present utility model will be clearly and completely described in connection with the embodiments, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1 to 3, an embodiment of the present utility model provides a test fixture for an air conditioner for rail transit, including: a pressure acquisition module 12, a temperature acquisition module 11, an electrical interface 13 and a display terminal 14; the input ends of the pressure acquisition module 12 and the temperature acquisition module 11 are connected with the rail traffic air conditioner through the electrical interface 13, and the output ends of the pressure acquisition module 12 and the temperature acquisition module 11 are connected with the display terminal 14; the pressure acquisition module 12 is used for acquiring pressure parameters of the rail transit air conditioner when the rail transit air conditioner operates; the temperature acquisition module 11 is used for acquiring temperature parameters of the rail traffic air conditioner when the rail traffic air conditioner operates and acquiring temperature parameters in a refrigeration environment of the rail traffic air conditioner when the rail traffic air conditioner operates; the display terminal 14 is used for recording and displaying the pressure parameter collected by the pressure collection module 12 and the temperature parameter collected by the temperature collection module 11.

The test fixture for the rail transit air conditioner is used for testing the rail transit air conditioner when the rail transit air conditioner is overhauled and maintained, and a pressure sensor and a temperature sensor are arranged in the rail transit air conditioner.

Further, the test fixture for the rail transit air conditioner comprises: a pressure acquisition module 12, a temperature acquisition module 11, an electrical interface 13 and a display terminal 14. The input ends of the pressure acquisition module 12 and the temperature acquisition module 11 are connected with the electrical interface 13. The pressure acquisition module 12 and the temperature acquisition module 11 are connected with the rail transit air conditioner through an electric interface 13. When the pressure sensor in the rail transit air conditioner is connected into a socket corresponding to the pressure acquisition module 12 through wiring, and the pressure acquisition module 12 can acquire pressure information of the pressure sensor; the temperature sensor in the rail traffic air conditioner is connected to the socket corresponding to the temperature acquisition module 11 through a wiring, and the temperature acquisition module 11 can acquire temperature information of the temperature sensor. The input end of the pressure acquisition module 12 is connected with the rail transit air conditioner, so that pressure parameters during the operation of the rail transit air conditioner can be acquired. After the input end of the temperature acquisition module 11 is connected with the rail traffic air conditioner, the temperature parameters of the rail traffic air conditioner during operation and the temperature parameters of the rail traffic air conditioner in a refrigerating environment (particularly a carriage of rail traffic) during operation can be acquired. The output ends of the pressure acquisition module 12 and the temperature acquisition module 11 are also connected with the display terminal 14, and in the process of acquiring parameters by the temperature acquisition module 11 and the pressure acquisition module 12, the temperature parameters acquired by the temperature acquisition module 11 (including the temperature parameters during the running of the rail transit air conditioner and the temperature parameters in the refrigerating environment of the rail transit air conditioner) and the pressure parameters acquired by the pressure acquisition module 12 are stored in the storage module of the display terminal 14 and can be displayed to maintenance personnel through the display terminal 14.

In this embodiment, after the maintainer obtains information such as a temperature parameter and a pressure parameter, the maintainer can determine the running state of the rail traffic air conditioner according to the collected parameters, and calculate parameters such as the superheat degree of the rail traffic air conditioner, so as to further determine the running state of the rail traffic air conditioner.

In this embodiment, a piezoresistor is disposed in the pressure sensor, and a thermistor is disposed in the temperature sensor. The pressure acquisition module 12 comprises a transformer arranged in a circuit of the pressure acquisition module 12, and after the piezoresistor is connected into the circuit of the pressure acquisition module 12 through the electrical interface 13, the resistance change of the piezoresistor is detected through the transformer so as to generate an analog signal or a digital signal; the pressure acquisition module 12 further includes a single-chip microcomputer capable of performing an operation, and the single-chip microcomputer converts an analog signal or a digital signal into a pressure value through an internal program operation and outputs the pressure value to the display terminal 14. Similarly, the temperature acquisition module 11 comprises a transformer arranged in the circuit of the temperature acquisition module 11, and when the thermistor enters the circuit of the temperature acquisition module 11 through the electrical interface 13, the change of the resistance value of the thermistor is detected through the transformer, so that an analog signal or a digital signal is generated; the temperature acquisition module 11 further includes a single-chip microcomputer capable of executing an operation, and the single-chip microcomputer converts an analog signal or a digital signal into a temperature value through an internal program operation and outputs the temperature value to the display terminal 14.

In this embodiment, optionally, the temperature sensor is disposed at a fresh air port, a return air port, a supply air port, a compressor air outlet, a compressor air inlet and other positions of the rail air conditioner; the rail air conditioner finally judges whether refrigeration or heating is needed or not through the temperature sensors.

In this embodiment, optionally, the pressure sensor includes a high pressure sensor and a low pressure sensor, the high pressure sensor is disposed at a discharge end of the compressor, and the low pressure sensor is disposed at a suction end of the compressor.

In the embodiment, the working parameters of the rail transit air conditioner compressor can be collected through the pressure sensor, so that whether the working state of the compressor is normal or not can be detected.

According to the test fixture for the rail transit air conditioner, the temperature acquisition module 11 is arranged to acquire temperature parameters (including the temperature parameters during the operation of the rail transit air conditioner and the temperature parameters in the refrigeration environment of the rail transit air conditioner) during the operation of the rail transit air conditioner, and the pressure acquisition module 12 is arranged to acquire pressure parameters during the operation of the rail transit air conditioner, wherein the temperature parameters and the pressure parameters can be recorded and displayed through the display terminal 14. Compared with the prior art, only need insert the test fixture into the rail cross air conditioner through electrical interface 13 and move the rail cross air conditioner can, need not operating personnel and use the universal meter alone to measure temperature sensor's resistance, and look up table obtain temperature parameter, and use the manometer alone to measure rail cross air conditioner pressure, the test flow has been simplified, the efficiency of test has been improved, the maintenance cost is lower, and, obtain temperature parameter and pressure parameter through electrical equipment, can avoid the error rate that manual operation brought, the test accuracy rate has been improved, make operating personnel can carry out more accurate, comprehensive maintenance to the rail cross air conditioner, thereby stability when helping improving follow-up rail cross air conditioner operation.

Furthermore, in the maintenance scheme of the existing rail transit air conditioning system, after the temperature parameters and the pressure parameters are acquired, the superheat degree calculation is needed, and as the parameters are more, the calculation formula is complex, the time consumption is longer, and the accuracy is low. Therefore, in the test fixture for the rail transit air conditioner provided by the embodiment of the utility model, the processor of the display terminal 14 comprises a calculation module, and a calculation formula of the superheat degree of the rail transit air conditioner is preset in the calculation module; the calculation module can calculate the superheat degree of the rail transit air conditioner according to the pressure information acquired by the pressure acquisition module 12 and the temperature information acquired by the temperature acquisition module 11, and the calculation result of the calculation module is recorded and displayed by the display terminal 14.

In the present embodiment, the display terminal 14 includes a display screen of liquid crystal for parameter display, and a processor for recording parameters, performing some arithmetic functions, and the like. The processor comprises a calculation module, and the calculation module is used for calculating the superheat degree of the rail transit air conditioner. Specifically, a calculation formula of the superheat degree of the rail traffic air conditioner is stored in the calculation module. After the parameter collection of the pressure collection module 12 and the temperature collection module 11 is completed, the calculation module calculates the superheat degree of the rail intersection air conditioner according to the parameter collected by the pressure collection module 12 and the temperature collection module 11 through a rail intersection air conditioner superheat degree calculation formula stored in the calculation module, and the calculated result of the superheat degree is recorded and displayed through the display terminal 14.

The superheat parameter is an important parameter index for measuring the performance of the refrigerating system, and has a critical influence on the normal operation of the system, the performance of the system and the efficiency of the system. The formula adopted in the process of calculating the superheat degree in this embodiment may be a prior art in the field, and will not be described here again. It may be understood that the calculation module may also be a calculation model stored for calculating the superheat degree of the rail traffic air conditioner, and the result of calculating the superheat degree obtained by the calculation model may also be recorded and displayed by the display terminal 14.

In this embodiment, the calculation module is used for calculating the superheat degree parameter of the rail traffic air conditioner in the processor, and the superheat degree parameter of the rail traffic air conditioner can be obtained after the temperature parameter and the pressure parameter are acquired, so that the calculation mode of manual calculation in the prior art is replaced by the superheat degree calculated by the calculation module, the efficiency is higher, and the result is more accurate.

In addition, the test fixture for the rail transit air conditioner provided by the embodiment further comprises an alarm module; and the warning module is internally preset with the superheat parameter of the rail transit air conditioner, and warns when the calculation result of the calculation module is inconsistent with the preset superheat parameter.

In this embodiment, the apparatus further includes an alarm module for sending an alarm when the calculation result of the calculation module does not match the preset superheat parameter interval. The warning module is also preset with the superheat parameter of the rail traffic air conditioner, the calculation result of the calculation formula is required to be compared with the superheat parameter preset in the warning module, and when the calculation result of the calculation formula is inconsistent with the preset superheat parameter, the warning module gives a warning to prompt maintenance personnel to further process.

Optionally, the alarm module can alarm through structures such as a buzzer or a warning lamp.

Preferably, in this embodiment, the alarm module is integrated into the processor, and when the calculation result of the calculation formula does not accord with the preset superheat parameter, the alarm module sends an alarm through the display screen to prompt maintenance personnel that the rail traffic air conditioner has a fault. The alarm module is integrated into the processor, so that the test fixture does not need to execute alarm in the arrangement of other structures, and the cost is reduced.

Through the alarm module in the processor, when the superheat degree result obtained by the calculation module is inconsistent with the preset result, an alarm can be timely sent out to remind maintenance personnel, the maintenance personnel are not required to look up a table again for comparison, and the efficiency is more efficient.

According to the test fixture for the rail transit air conditioner, as shown in fig. 2, data interaction is achieved between the temperature acquisition module 11 and the display terminal 14 and between the pressure acquisition module 12 and the display terminal 14 in a 485 communication mode.

According to the test fixture for the rail transit air conditioner, data interaction is achieved in a 485 communication mode between the temperature acquisition module 11 and the processor of the display terminal 14, and meanwhile, data interaction is achieved in a 485 communication mode between the pressure acquisition module 12 and the processor of the display terminal 14. 485 communication has good module expansibility so as to be convenient for timely expanding when the jack of the electric interface 13 is insufficient.

Optionally, in this embodiment, data transmission may be performed between the temperature acquisition module 11 and the display terminal 14, and between the pressure acquisition module 12 and the display terminal 14 by wireless transmission or the like.

As shown in fig. 1 and fig. 2, the temperature acquisition module 11 includes a PT temperature acquisition module 111 and/or an NTC temperature acquisition module 112.

In this embodiment, the temperature sensors used in the rail-mounted air conditioner of each manufacturer are different, so the temperature collection module 11 may be a PT temperature collection module 111 for matching with the rail-mounted air conditioner of the corresponding model, or the temperature collection module 11 may be an NTC temperature collection module 112 for matching with the rail-mounted air conditioner of the corresponding model.

Preferably, the temperature acquisition modules 11 include two types, namely a PT temperature acquisition module 111 and an NTC temperature acquisition module 112, so as to improve the practicability of the test fixture.

Correspondingly, the electrical interface 13 is divided into a socket corresponding to the PT temperature acquisition module 111 and a socket corresponding to the NTC temperature acquisition module 112, and can be correspondingly connected according to the model of the temperature sensor in the rail transit air conditioner when in use.

In this embodiment, the NTC temperature sensor detects temperature through the thermistor, and the NTC thermistor has poor linearity, small size and fast response to temperature change. The NTC thermistor is suitable for low-cost occasions with low precision requirements and needs quick measurement, and is suitable for space requirements.

PT temperature sensor is a sensor that converts a temperature variable into a transportable standardized output signal, and generally employs a metal thermal resistor, such as a platinum thermal resistor, which has high measurement accuracy and stable performance, but relatively high cost. The PT temperature sensor is suitable for occasions with high precision requirements and low sensitivity to cost.

The embodiment of the utility model provides a test fixture for a rail transit air conditioner, which is shown in fig. 1, and further comprises a shell 15; the temperature acquisition module 11, the pressure acquisition module 12 and the electrical interface 13 are all arranged in the shell 15; the housing 15 is provided with a first opening, and the electrical interface 13 is provided with a socket, and the socket extends out of the housing 15 through the first opening.

The embodiment provides a test fixture for rail traffic air conditioner, still includes shell 15, and shell 15 is the cuboid structure, and the inside of shell 15 is formed with the chamber of holding. Wherein, temperature acquisition module 11, pressure acquisition module 12 and electrical interface 13 all set up in the holding intracavity of shell 15, and shell 15 can play certain guard action to temperature acquisition module 11, pressure acquisition module 12 and electrical interface 13. And, with temperature acquisition module 11, pressure acquisition module 12 and electrical interface 13 all integrate to in the shell 15, test fixture is more brief, and convenient test fixture carries. The shell 15 is provided with a first opening, and a socket of the motor interface extends out of the shell 15 through the first interface so as to be convenient for connection with wiring of the rail transit air conditioner.

Further, in the test fixture for a rail transit air conditioner provided in this embodiment, the display terminal 14 is disposed in the housing 15; the display terminal 14 includes a display screen, and the housing 15 is provided with a second opening, and the display screen can extend out of the housing 15 through the second opening.

In this embodiment, the display terminal 14 is also disposed in the housing 15, and the housing 15 can play a certain role in protecting the display terminal 14, and the display terminal 14 is integrated into the housing 15, so that the test fixture is convenient to carry. The display terminal 14 includes a processor and a display screen, which is a liquid crystal screen and is used for displaying parameter information and the like. The housing 15 is provided with a second opening, and the display screen can extend out of the housing 15 through the second opening for maintenance personnel to browse.

Optionally, the temperature acquisition module 11 and the pressure acquisition module 12 can also transmit data with the display terminal 14 through a wireless connection mode.

Preferably, in this embodiment, as shown in fig. 1, the electrical interface 13 is a fast-inserting terminal row, which has advantages of convenient connection and easy expansion.

In this embodiment, the fast plug terminal row has a plurality of sockets, part of the sockets are sockets of the PT temperature acquisition module 111, part of the sockets are sockets of the NTC temperature acquisition module 112, and the remaining sockets are sockets of the pressure acquisition module 12.

When the intelligent temperature control system is used, the wiring of the PT temperature sensor is inserted into the socket of the PT temperature acquisition module 111, the wiring of the NTC temperature sensor is inserted into the socket of the NTC temperature acquisition module 112, the wiring of the pressure acquisition module 12 is inserted into the socket of the pressure acquisition module 12, and then the rail traffic air conditioner is kept running, namely the parameters can be acquired.

Alternatively, in the present embodiment, the electrical interface 13 may also be a connection post or the like.

The embodiment of the utility model provides a test fixture for a rail transit air conditioner, which also comprises a power supply; the display terminal 14, the temperature acquisition module 11 and the pressure acquisition module 12 are all connected with the power supply, and the power supply supplies power to the display terminal 14, the temperature acquisition module 11 and the pressure acquisition module 12.

In this embodiment, a power supply is also configured in the housing, the power supply is a 24 volt dc power supply, and the power supply supplies power to the display terminal 14, the pressure acquisition module 12, and the temperature acquisition module 11. Through configuration power in the casing, the test fixture need not extra wiring when using, and practicality and adaptability are stronger.

In the test tool for the rail transit air conditioner provided by the embodiment of the utility model, as shown in fig. 3, the processor is provided with the storage module, and the storage module is internally provided with display pages of various types of rail transit air conditioners.

In this embodiment, because there may be a certain difference between the test parameters related to the rail-mounted air conditioners of different models, the processor is further integrated with a storage module, and the storage module is internally configured with display pages of the rail-mounted air conditioners of various models, and the display pages are displayed through the display screen. Before testing, maintenance personnel need to select a corresponding display page according to the type of the rail traffic air conditioner to be tested so as to carry out subsequent operation.

Optionally, the display screen is a touch screen, and before use, maintenance personnel can switch the display page of the display screen to correspond to the rail traffic air conditioner to be tested through the display screen.

In this embodiment, through setting up the storage module to dispose the display page of the rail traffic air conditioner of multiple model in the storage module, make same test fixture can adapt to the rail traffic air conditioner of multiple different models, make test fixture have stronger practicality.

According to the test fixture for the rail transit air conditioner, provided by the embodiment of the utility model, the temperature acquisition module 11 and the pressure acquisition module 12 are respectively provided with an independently arranged control module; the control module can control the temperature acquisition module 11 and the pressure acquisition module 12 to be matched with the model of the rail transit air conditioner.

The test fixture for the rail traffic air conditioner, which is provided by the embodiment, can relate to sensors of various different types when testing the rail traffic air conditioner of different types, and therefore, the temperature acquisition module 11 and the pressure acquisition module 12 are configured with control modules which are independently arranged, and the control modules can switch the temperature acquisition module 11 and the pressure acquisition module 12 according to the types of the sensors so as to adapt to the rail traffic air conditioner and ensure that the test flow can be normally carried out.

Before use, maintenance personnel confirm the model of the rail traffic air conditioner first, then select corresponding display page, after the display page confirms, the control module of temperature acquisition module 11 controls the adaptation of temperature sensor and the rail traffic air conditioner of this model according to the display page of selecting, the control module of pressure acquisition module 12 controls the adaptation of pressure sensor and the rail traffic air conditioner of this model according to the display page of selecting.

In this embodiment, the temperature acquisition module 11 and the pressure acquisition module 12 are configured with the control modules which are independently arranged, so that the test fixture can adapt to rail traffic air conditioners with various different models, and has strong practicability.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the communication may be direct or indirect through an intermediate medium, or may be internal to two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.

Claims (10)

1. The utility model provides a test fixture for air conditioner is handed over to rail which characterized in that includes: the system comprises a pressure acquisition module (12), a temperature acquisition module (11), an electrical interface (13) and a display terminal (14);

The input ends of the pressure acquisition module (12) and the temperature acquisition module (11) are connected with the rail intersection air conditioner through the electrical interface (13), and the output ends of the pressure acquisition module (12) and the temperature acquisition module (11) are connected with the display terminal (14);

The pressure acquisition module (12) is used for acquiring pressure parameters of the rail transit air conditioner when the rail transit air conditioner operates; the temperature acquisition module (11) is used for acquiring temperature parameters of the rail traffic air conditioner when the rail traffic air conditioner operates and acquiring temperature parameters in a refrigerating environment of the rail traffic air conditioner when the rail traffic air conditioner operates;

the display terminal (14) is used for recording and displaying the pressure parameters acquired by the pressure acquisition module (12) and the temperature parameters acquired by the temperature acquisition module (11).

2. The rail transit air conditioner test fixture according to claim 1, characterized in that the temperature acquisition module (11) comprises a PT temperature acquisition module (111) and/or an NTC temperature acquisition module (112);

the electrical interface (13) is a fast-inserting terminal row.

3. The test fixture for the rail transit air conditioner according to claim 1, wherein data interaction is realized in a 485 communication mode between the temperature acquisition module (11) and the display terminal (14) and between the pressure acquisition module (12) and the display terminal (14).

4. The test fixture for a rail transit air conditioner according to claim 1, further comprising a housing (15);

The temperature acquisition module (11), the pressure acquisition module (12) and the electrical interface (13) are all arranged in the shell (15);

The housing (15) is provided with a first opening, and the electrical interface (13) is provided with a socket, and the socket extends out of the housing (15) through the first opening.

5. The test fixture for a rail transit air conditioner according to claim 4, wherein the display terminal (14) is arranged in the housing (15);

The display terminal (14) comprises a display screen, a second opening is formed in the shell (15), and the display screen can extend out of the shell (15) through the second opening.

6. The test fixture for a rail transit air conditioner according to any one of claims 1 to 5, further comprising a power supply;

The display terminal (14), the temperature acquisition module (11) and the pressure acquisition module (12) are all connected with the power supply, and the power supply supplies power for the display terminal (14), the temperature acquisition module (11) and the pressure acquisition module (12).

7. The test fixture for the rail transit air conditioner according to claim 1, wherein the processor of the display terminal (14) comprises a calculation module, a calculation formula or a calculation model of the superheat degree of the rail transit air conditioner is preset in the calculation module, and a calculation result of the calculation module is recorded and displayed through the display terminal (14).

8. The tool according to claim 7, wherein the processor is provided with a memory module, and the memory module is internally provided with display pages of various models of rail transit air conditioners.

9. The test fixture for the rail transit air conditioner of claim 7, further comprising an alarm module;

And the warning module is internally preset with a superheat parameter interval of the rail transit air conditioner, and can warn when the calculation result of the calculation module is inconsistent with the preset superheat parameter interval.

10. The test fixture for the rail transit air conditioner according to claim 1, wherein the temperature acquisition module (11) and the pressure acquisition module (12) are respectively provided with an independently arranged control module;

The control module can control the temperature acquisition module (11) and the pressure acquisition module (12) to be matched with the type of the rail transit air conditioner.