Railway vehicle air conditioning system waterproof structure, control method and condensation working condition test method of railway vehicle air conditioning system waterproof structure

Abstract

The invention provides a waterproof structure of an air conditioning system of a railway vehicle. The water pan is mounted below the evaporator and is configured to receive condensate water flowing down from the evaporator; the air feeder is mounted on one side of the evaporator; a water baffle is arranged on the side, close to the air feeder, between the bottom of the evaporator and the water pan, the water baffle is of an inverted-U-shaped structure, and at least one drainage hole is formed in the bottom of the water baffle. The invention further provides a control method of the waterproof structure of the air conditioning system of the railway vehicle and a condensation working condition test method.

Description

Technical Field

[0001] The present disclosure relates to a rail vehicle air-conditioning system, and in particular to a waterproof structure, a control method, and a condensation operating condition test method of the rail vehicle air-conditioning system. Background Art

[0002] With the continuous advancement of rail vehicle technology, rail vehicle comfort has become a key consideration. As a key component in enhancing onboard comfort, the performance and reliability of rail vehicle air conditioning directly impact the passenger experience. Rail vehicle air conditioning not only regulates interior temperature and humidity, creating a comfortable riding environment, but also improves air quality and safeguards passenger health. A well-functioning air conditioning system can enhance passenger satisfaction and strengthen the market competitiveness of rail vehicles. Therefore, the stable operation of rail vehicle air conditioning is crucial to the overall performance of the rail vehicle.

[0003] In the field of rail vehicle air conditioning, to prevent condensation from entering the vehicle, a common practice in the past was to optimize the design of the air conditioning unit's water pan, ensuring sufficient capacity to receive condensation and setting a reasonable drainage slope to allow the condensation to flow naturally into the drain. At the same time, attention was paid to the installation precision of the evaporator and the water pan, minimizing the gap between them and reducing condensation splashing caused by the gap. Furthermore, consideration was given to the selection of the blower and the design of the air duct to reduce wind speed, thereby reducing the possibility of condensation entering the vehicle due to excessive wind speed.

[0004] However, due to the vibrations generated by rail vehicles during operation, the bottom of the evaporator and the drain pan can easily become uneven, resulting in a gap between them. In this case, even if the blower speed is normal, condensed water in the drain pan can be carried into the vehicle through the gap. Therefore, a waterproof structure, control method, and condensation condition test method for rail vehicle air conditioning systems are needed. Summary of the Invention

[0005] According to an embodiment of one aspect of the present disclosure, a waterproof structure of a rail vehicle air-conditioning system is provided, comprising: an evaporator; a water receiving pan installed below the evaporator and configured to receive condensed water flowing down from the evaporator; and a blower installed on one side of the evaporator; wherein a water baffle is provided between the bottom of the evaporator and the water receiving pan on a side close to the blower, the water baffle being an inverted U-shaped structure and having at least one drainage hole provided at the bottom.

[0006] According to an embodiment of the present disclosure, the water retaining plate includes a horizontal plate horizontally arranged at the top and side plates arranged on both sides of the horizontal plate and extending downward, and the drainage holes are arranged at the bottom of the side plates.

[0007] According to an embodiment of the present disclosure, the height of the water baffle is 1-1.5 times the distance between the bottom of the evaporator and the inner bottom surface of the water receiving tray.

[0008] According to an embodiment of the present disclosure, the waterproof structure further includes an air-conditioning controller electrically connected to the blower to adjust the wind speed of the blower.

[0009] According to an embodiment of the present disclosure, at least one set of water leakage sensors is provided around the water receiving tray, electrically connected to the air conditioning controller and configured to detect liquid signals around the water receiving tray.

[0010] According to an embodiment of another aspect of the present disclosure, a method for controlling the waterproof structure of a rail vehicle air-conditioning system as described above is provided, comprising: reducing the wind speed of the blower in response to a liquid signal sent by a water leakage sensor; and adjusting the operating parameters of the compressor in response to a real-time pressure value of the rail vehicle air-conditioning system.

[0011] According to an embodiment of the present disclosure, the method for reducing the wind speed of the blower in response to the liquid signal sent by the water leakage sensor includes: when the water leakage sensor sends the liquid signal, reducing the wind speed of the blower in steps according to a preset gradient.

[0012] According to an embodiment of the present disclosure, the method for adjusting the operating parameters of the compressor in response to the real-time pressure value of the rail vehicle air-conditioning system includes: when the real-time pressure value is lower than a preset value, reducing the operating frequency of the compressor and / or the number of parallel compressors started.

[0013] According to an embodiment of another aspect of the present disclosure, a condensation operating condition test method for a rail vehicle air-conditioning system is provided, comprising: setting the air volume of the blower to a preset proportion of the rated air volume to simulate abnormal wind pressure conditions caused by changes in air duct resistance after the air conditioner is installed.

[0014] According to an embodiment of the present disclosure, the preset ratio is 110-120%.

[0015] According to the embodiments of the present disclosure, an inverted U-shaped water baffle with a drainage hole is provided between the bottom of the evaporator and the water receiving pan, so that the water inside the water baffle can be discharged, thereby preventing the blower from bringing condensed water into the vehicle through the bottom gap when there is a gap between the evaporator and the bottom of the water receiving pan; water leakage sensors are provided around the water receiving pan, and the air-conditioning controller can control the speed of the speed-regulating blower, the operating frequency or number of the compressor according to the water leakage sensor signal to prevent the evaporator from freezing and ensure that the cooling of the air-conditioning system meets the temperature inside the vehicle; when the air-conditioning system is tested under condensation conditions, the air supply volume is set to be greater than a certain proportion of the rated air volume for testing, so as to prevent condensed water from being brought into the vehicle when the air volume increases due to mismatch or error in the return air resistance after the air conditioner is installed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0017] Figure 1 is a plan view of a waterproof structure of a rail vehicle air-conditioning system according to an embodiment of the present disclosure;

[0018] Figure 2 is a front view of a water retaining plate according to an embodiment of the present disclosure;

[0019] Figure 3 2 is a side view of a water retaining plate according to an embodiment of the present disclosure.

[0020] Description of reference numerals:

[0021] 1. Evaporator; 2. Drain tray; 3. Blower; 4. Water baffle; 41. Drain hole; 42. Side panel. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0023] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise," "include," etc. used herein indicate the presence of the features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0024] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0025] It should also be noted that directional terms such as "upper," "lower," "front," "back," "left," and "right" mentioned in the embodiments are merely references to the directions in the accompanying drawings and are not intended to limit the scope of protection of this disclosure. Throughout the drawings, identical elements are represented by identical or similar reference numerals. Conventional structures or configurations will be omitted where they may cause confusion in understanding this disclosure.

[0026] Figure 1 A schematic plan view of a waterproof structure of a rail vehicle air conditioning system according to an embodiment of the present disclosure; Figure 2 is a front view of a water retaining plate according to an embodiment of the present disclosure; Figure 3 : is a side view of the water retaining plate in the embodiment of the present disclosure. Figure 1-3As shown, according to an embodiment of one aspect of the present disclosure, a waterproof structure of a rail vehicle air-conditioning system is provided, comprising: an evaporator 1; a water receiving tray 2, installed below the evaporator 1 and configured to receive condensed water flowing down from the evaporator 1; and a blower 3, installed on one side of the evaporator 1; wherein, a water baffle 4 is provided between the bottom of the evaporator 1 and the water receiving tray 2 on a side close to the blower 3, the water baffle 4 is an inverted U-shaped structure, and at least one drainage hole 41 (two are shown in the figure) is provided at the bottom, and the direction of the arrow in the figure is the direction of the airflow.

[0027] Through the above technical solution, an inverted U-shaped water baffle with drainage holes is set between the bottom of the evaporator and the water receiving tray, which can drain the water inside the water baffle and prevent the blower from bringing condensed water into the car through the bottom gap when there is a gap between the evaporator and the bottom of the water receiving tray.

[0028] According to an embodiment of the present disclosure, the water retaining plate 4 includes a horizontal plate (not shown) disposed horizontally at the top, and side plates 42 extending downwardly from both sides of the horizontal plate. Drain holes 41 are provided at the bottom of the side plates 42. Furthermore, the drain holes 41 are evenly distributed on the side plates 42, allowing condensed water at all locations to be drained smoothly. The location of the drain holes 41 at the bottom of the side plates 42 facilitates the condensed water to flow by gravity to the lowest point at the bottom of the water receiving pan 2, thereby improving drainage efficiency.

[0029] According to an embodiment of the present disclosure, the height of the water baffle 4 is 1-1.5 times the distance between the bottom of the evaporator 1 and the inner bottom surface of the water tray 2. This prevents the blower from bringing condensed water into the vehicle while also preventing the water baffle 4 from affecting the operation of the evaporator 1. Furthermore, the side panels 42 of the water baffle 4 abut against the inner wall of the water tray 2, and the bottom of the side panels 42 can extend below the evaporator 1, so that the water baffle 4 forms a sealed space with the outer side of the evaporator 1, enhancing the waterproof effect and preventing the blower from bringing condensed water into the vehicle through the gap at the bottom.

[0030] According to an embodiment of the present disclosure, the waterproof structure further includes an air-conditioning controller (not shown in the figure), which is electrically connected to the air blower 3 to adjust the wind speed of the air blower 3 .

[0031] According to an embodiment of the present disclosure, at least one set of water leakage sensors (not shown in the figure) is provided around the water receiving tray 3, which is electrically connected to the air conditioning controller and is configured to detect liquid signals around the water receiving tray 4 and transmit electrical signals to the air conditioning controller.

[0032] According to an embodiment of another aspect of the present disclosure, a method for controlling a waterproof structure of a rail vehicle air-conditioning system is provided, comprising: reducing the wind speed of the blower in response to a liquid signal sent by a water leakage sensor; and adjusting the operating parameters of the compressor in response to a real-time pressure value of the rail vehicle air-conditioning system.

[0033] According to an embodiment of the present disclosure, the method for reducing the wind speed of the blower in response to the liquid signal sent by the water leakage sensor includes: when the water leakage sensor sends the liquid signal, reducing the wind speed of the blower in steps according to a preset gradient.

[0034] According to an embodiment of the present disclosure, the method for adjusting the operating parameters of the compressor in response to the real-time pressure value of the rail vehicle air-conditioning system includes: when the real-time pressure value is lower than a preset value, reducing the operating frequency of the compressor and / or the number of parallel compressors started.

[0035] Through the above technical solution, water leakage sensors are set around the water tray, and the air conditioning controller can control the speed of the speed-controlled blower, the operating frequency or number of compressors according to the water leakage sensor signal to prevent the evaporator from freezing and ensure that the cooling of the air conditioning system meets the temperature inside the car.

[0036] Furthermore, according to an embodiment of the present disclosure, when the air conditioning controller detects that condensed water overflows the water receiving tray 2, it controls the speed of the blower 3 to be reduced to a predetermined threshold, and adjusts the operating parameters of the compressor according to the feedback of the pressure sensor in the refrigeration system.

[0037] Through the above technical solution, when condensed water is detected overflowing from the water tray, the blower speed is reduced to a predetermined threshold value, which can reduce the possibility of condensed water being brought out of the water tray. The compressor operating parameters are adjusted according to the feedback from the refrigeration system pressure sensor, which can control the cooling capacity of the air-conditioning unit, prevent the evaporator from freezing, and ensure that the air-conditioning unit can cool to the maximum extent to meet the temperature inside the vehicle.

[0038] Further, according to an embodiment of the present disclosure, when the air volume of the blower and the frequency of the compressor have been reduced to preset values, the water leakage sensor still detects water leakage, it is judged that the condensate drain outlet in the water receiving tray 2 is blocked; when the air-conditioning controller detects that the condensate drain outlet in the water receiving tray 2 is blocked, it cuts off the power supply to the compressor and sends a fault signal to the train network management system.

[0039] Through the above technical solution, when the drain outlet of the water receiving tray is blocked, the air-conditioning controller cuts off the power supply to the compressor, which can prevent the condensed water from being unable to be discharged normally, so that the condensed water is brought into the car by the blower 3, and at the same time sends a fault signal to the train network management system to remind maintenance personnel to carry out timely maintenance.

[0040] According to another embodiment of the present disclosure, a condensation operating condition test method for a rail vehicle air conditioning system is provided, comprising: operating the air flow of a blower 3 at a preset ratio of the rated air flow to simulate abnormal air pressure conditions caused by changes in air duct resistance after the air conditioner is installed. Furthermore, according to an embodiment of the present disclosure, the preset ratio is 110-120%.

[0041] Through the above technical solution, when the air-conditioning system is tested under condensation conditions, the supply air volume is set to be a certain proportion greater than the rated air volume. This can prevent condensed water from being brought into the vehicle when the air volume increases due to mismatch or error in the return air resistance after the air conditioner is installed.

[0042] Further, according to an embodiment of the present disclosure, the preset ratio may be determined based on an actual resistance variation range of the supply and return air systems after the air conditioner is installed.

[0043] By adopting the above technical solution, the preset ratio is determined based on the actual resistance variation range of the supply and return air system after the air conditioner is installed. This can make the air supply volume set in the condensation working condition test more in line with the actual situation, and effectively verify whether condensation water will be carried out of the water collection tray when the air volume increases due to mismatch or error in the supply and return air resistance, so as to avoid condensation water from being brought into the vehicle when the air supply volume exceeds the rated air supply volume due to various reasons.

[0044] The embodiments of the present disclosure are described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present disclosure. Although each embodiment has been described separately above, this does not mean that the measures in each embodiment cannot be used in combination to advantage. The scope of the present disclosure is defined by the appended claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A waterproof structure for a rail vehicle air conditioning system, comprising: Evaporator (1); A water receiving tray (2) is installed below the evaporator (1) and is configured to receive condensed water flowing down from the evaporator (1); as well as A blower (3) is installed on one side of the evaporator (1); A water baffle (4) is provided between the bottom of the evaporator (1) and the water receiving tray (2) on a side close to the blower, and the water baffle (4) is an inverted U-shaped structure, and at least one drainage hole (41) is provided at the bottom.

2. The waterproof structure of the rail vehicle air conditioning system according to claim 1, wherein: The water retaining plate (4) comprises a horizontal plate arranged horizontally at the top and side plates (42) arranged on both sides of the horizontal plate and extending downwards, and the drainage hole (41) is provided at the bottom of the side plate (43).

3. The waterproof structure of the rail vehicle air conditioning system according to claim 2, wherein: The height of the water baffle (4) is 1-1.5 times the distance between the bottom of the evaporator (1) and the inner bottom surface of the water receiving tray (2).

4. The waterproof structure of the rail vehicle air conditioning system according to claim 1, wherein: It also includes an air conditioning controller electrically connected to the air blower (3) to adjust the wind speed of the air blower (3).

5. The waterproof structure of the rail vehicle air conditioning system according to claim 4, wherein: At least one set of water leakage sensors is provided around the water receiving tray (2), is electrically connected to the air-conditioning controller, and is configured to detect liquid signals around the water receiving tray (2).

6. A method for controlling a waterproof structure of a rail vehicle air conditioning system according to any one of claims 1 to 5, comprising: In response to the liquid signal sent by the water leakage sensor, reducing the wind speed of the blower; as well as In response to the real-time pressure value of the rail vehicle air conditioning system, the operating parameters of the compressor are adjusted.

7. The method according to claim 6, wherein: The method for reducing the wind speed of the blower in response to the liquid signal sent by the water leakage sensor includes: when the water leakage sensor sends the liquid signal, reducing the rotation speed of the blower in steps according to a preset gradient.

8. The method according to claim 6, wherein: The method for adjusting the operating parameters of the compressor in response to the real-time pressure value of the rail vehicle air conditioning system includes: when the real-time pressure value is lower than a preset value, reducing the operating frequency of the compressor and / or reducing the number of parallel compressors in operation.

9. A condensation condition test method for a waterproof structure of a rail vehicle air conditioning system according to any one of claims 1 to 5, comprising: The air volume of the blower is set to a preset ratio greater than the rated air volume to simulate the abnormal wind pressure condition caused by the change of duct resistance after the air conditioner is installed.

10. The test method according to claim 9, wherein: The preset ratio is 110-120%.

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