Low-noise railway vehicle air conditioning system and control method thereof

Abstract

The invention provides a low-noise railway vehicle air-conditioning system which is installed in a railway vehicle body and comprises a plurality of air-conditioning units, each air-conditioning unit comprises a box body, an evaporator and a condenser, and the box body is formed into an evaporation cavity and a condensation cavity; the at least two groups of ventilators are mounted in the evaporation cavity and are suitable for sending out cold air; the air duct is formed at the air outlet of the ventilator and communicates the air outlet of the ventilator with the outside of the air conditioning system; and a lower convex part is arranged at the bottom of the evaporation cavity, so that the included angle between the axis of the air outlet of the ventilator and the horizontal plane is a first angle. The invention further provides a control method of the low-noise railway vehicle air conditioning system. The control method comprises the steps that a train signal is detected; when the signal that the train is in the arrival door opening or static state is detected, the rotating speed of the ventilator is controlled to be reduced, so that the air supply amount is reduced, and noise generated by the air conditioning system in the train is reduced; and when the signal that the train is in the door closing and normal operation state is detected, the rotating speed of the ventilator is controlled to be increased to the rated wind speed.

Description

Technical Field

[0001] The present disclosure relates to the technical field of rail vehicle air-conditioning equipment, and in particular to a low-noise rail vehicle air-conditioning system and a control method thereof. Background Art

[0002] Rail transit vehicles typically use two roof-mounted air conditioning units, either platform- or straddle-mounted. The air conditioning supply and return vents are located below the units, with corresponding openings in the vehicle body. The air conditioning fans deliver conditioned air downward into the ducts through the lower outlets, generating significant wind noise. High-capacity intercity and intercity vehicles often use a built-in mounting structure, separating the air conditioning unit from the ducts. The vents are located below the unit, also delivering conditioned air downward into the ducts through the lower outlets. This generates significant wind noise. Therefore, a low-noise rail vehicle air conditioning system is needed. Summary of the Invention

[0003] In view of this, the present disclosure provides a low-noise rail vehicle air-conditioning system, which is installed in the rail vehicle body and includes: multiple groups of air-conditioning units, each group of air-conditioning units includes: a box body, the box body is formed into an evaporation chamber and a condensation chamber; and at least two groups of ventilators, which are installed inside the evaporation chamber and are suitable for sending out cold air; an air duct, which is formed at the air outlet of the ventilator and connects the air outlet of the ventilator with the outside of the air-conditioning system; wherein, a lower convex portion is provided at the bottom of the evaporation chamber so that the angle between the air outlet axis of the ventilator and the horizontal plane is a first angle.

[0004] According to an embodiment of the present disclosure, the first angle is 0-10°.

[0005] According to an embodiment of the present disclosure, the lower convex portion protrudes downward into the interior of the vehicle body, and the vehicle body is provided with an opening whose size matches the contour of the lower convex portion.

[0006] According to an embodiment of the present disclosure, the bottom of the air conditioning unit and the air duct are independently arranged.

[0007] According to an embodiment of the present disclosure, each group of air-conditioning units is of the same specification, and each group of air-conditioning units is detachably connected to the air duct.

[0008] According to an embodiment of the present disclosure, each air-conditioning unit further includes: a compressor installed inside the condensing chamber; a fresh air valve installed on one side of the condensing chamber close to the evaporating chamber; and a condensing fan installed on the top of the condensing chamber.

[0009] According to an embodiment of the present disclosure, the air-conditioning unit is installed in the rail vehicle body in an embedded or platform-type installation manner.

[0010] According to an embodiment of the present disclosure, the air conditioning system further includes an air conditioning controller electrically connected to the ventilators and configured to adjust the wind speed of each group of ventilators separately.

[0011] According to an embodiment of the present disclosure, the air conditioning controller is further configured to switch the speed mode based on the status signal of the train door opening or closing and the operation signal of the train being stationary or moving, so as to achieve reasonable distribution of air volume.

[0012] According to an embodiment of another aspect of the present disclosure, a control method for a low-noise rail vehicle air-conditioning system is provided, which is applied to the air-conditioning system as described above, and includes: detecting a train status signal; when a signal is detected that the train is in an open door or stationary state upon arrival at a station, controlling the speed of the ventilator to decrease so as to reduce the air supply volume and reduce the noise generated by the air-conditioning system in the vehicle; when a signal is detected that the train is in a closed door and normal operating state, controlling the speed of the ventilator to increase to the rated wind speed.

[0013] According to the embodiment of the present disclosure, the evaporation chamber is partially convex downward, thereby increasing the height space of the evaporation chamber, making the air outlet of the ventilator convex downward, and the air-conditioning unit is made to supply air roughly horizontally from both sides through the air duct, thereby reducing the aerodynamic noise generated by the air flow hitting the turning structure compared with the downward air outlet form; at the same time, the air-conditioning unit and the air duct are independently arranged, reducing the connection relationship between the air-conditioning and the air duct, making the air-conditioning unit on the vehicle easy to replace; by controlling the wind speed of each group of ventilators separately, the air volume can be reasonably distributed at the air outlets on both sides of the vehicle, and at the same time, the wind speed can be reduced when the vehicle is stationary or with the door open to reduce the noise inside the vehicle, and the fan wind speed can be increased when the train door is closed or running to ensure the normal operation of the air-conditioning system, thereby reducing the noise inside the vehicle while ensuring the operating efficiency of the air-conditioning system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] 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:

[0015] Figure 1 is a cross-sectional view of an embedded air conditioning system according to an embodiment of the present disclosure;

[0016] Figure 2 It is a cross-sectional view of a platform-mounted air conditioning system in an embodiment of the present disclosure.

[0017] Description of reference numerals:

[0018] 2. Ventilator; 3. Air duct; 4. Compressor; 5. Condensing fan; 6. Fresh air valve; 7. Pressure protection valve; 11. Evaporation chamber; 12. Condensation chamber; 111. Lower convex part. DETAILED DESCRIPTION

[0019] 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.

[0020] 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.

[0021] 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.

[0022] 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.

[0023] In typical rail vehicles, air conditioners cannot be placed at the 1 / 4 or 3 / 4 positions due to limitations imposed by components like the roof pantograph and the interior layout. Furthermore, the two fans in the corresponding ventilation systems have different structural resistances, requiring fans designed for higher air volumes or higher static pressures. Uniform air delivery is achieved through the addition of adjustment plates, resulting in complex structures and poor noise reduction. Different air conditioner placement and interior design can lead to different air duct structures underneath, resulting in varying air conditioner unit specifications and the inability to interchange air conditioners across the train. Furthermore, when a train arrives at a station, opens its doors, or is stationary, air conditioning noise is the primary source of in-train noise. Therefore, the inventors have proposed a low-noise rail vehicle air conditioning system and control method.

[0024] According to an embodiment of one aspect of the present disclosure, a low-noise rail vehicle air conditioning system is provided, such as Figure 1-2As shown, it includes: multiple groups of air conditioning units (not shown in the figure), each group of air conditioning units includes: a box body, the box body is formed into an evaporation chamber 11 and a condensation chamber 12; and at least two groups of ventilators 2, installed inside the evaporation chamber 11, suitable for sending out cold air; an air duct 3, formed at the air outlet of the ventilator 2, connecting the air outlet of the ventilator 2 with the outside of the air conditioning system; an air conditioning controller (not shown in the figure), electrically connected to the ventilator 2, and configured to adjust the wind speed of each group of ventilators 2 separately; wherein, the bottom of the evaporation chamber 11 is provided with a lower protrusion 111, so that the air outlet axis of the ventilator 2 is at a first angle with the horizontal plane. Further, according to an embodiment of the present disclosure, the first angle is 0-10°, for example, 1°, 3°, 5°, 7°, and 9°, so that the air outlet of the ventilator sends air in a substantially horizontal direction through the air duct.

[0025] According to the embodiment of the present disclosure, the height space of the evaporation chamber 11 is increased by partially convexing the evaporation chamber 11, so that the air outlet of the fan 2 is convex downward, and the air-conditioning unit is allowed to supply air roughly horizontally from both sides through the air duct, which reduces the aerodynamic noise generated by the air flow hitting the turning structure compared to the downward air outlet form.

[0026] According to an embodiment of the present disclosure, the lower convex portion 111 protrudes downward to the interior of the vehicle body, and an opening (not shown in the figure) whose size matches the contour of the lower convex portion 111 is provided on the vehicle body. Figure 2 As shown, for a platform-mounted air conditioning system, the vehicle body is only provided with an opening matching the contour of the lower convex portion 111 on the lower convex portion 111 of the evaporation chamber 11. Through the above technical solution, while reducing noise, the number of openings in the vehicle body is reduced, and the vehicle body strength is improved.

[0027] According to the embodiment of the present disclosure, the bottom of the air conditioning unit is independently provided with the air duct 3. Through the above technical solution, the connection relationship between the air conditioning unit and the air duct 3 is reduced, making it easier to replace the air conditioning unit on the vehicle.

[0028] According to the embodiment of the present disclosure, each group of air-conditioning units is of the same specification, and each group of air-conditioning units is detachably connected to the air duct 3, so that the air-conditioning units of the entire row in the rail vehicle have the same structure and can be installed in interchangeable positions, thereby improving assembly efficiency.

[0029] According to an embodiment of the present disclosure, each air-conditioning unit further includes: a compressor 4 installed inside the condensing chamber 12; a fresh air valve 6 installed on one side of the condensing chamber 12 close to the evaporating chamber 11; and a condensing fan 5 installed on the top of the condensing chamber 12.

[0030] According to an embodiment of the present disclosure, the compressor 4 includes a scroll or screw compressor, which is suitable for compressing low-temperature, low-pressure refrigerant gas into high-temperature, high-pressure refrigerant gas to provide energy for the refrigeration cycle. The fresh air valve 6 is suitable for introducing fresh air from outside the vehicle to maintain the air quality and oxygen concentration in the vehicle cabin. The condensing fan 5 is suitable for driving an axial airflow, vertically or horizontally sucking in relatively cool outside air above the roof of the vehicle, and discharging the heated air upward back to the outside atmosphere. The air conditioning unit may also include a rainwater separator (not shown in the figure), which is installed at the top of the condensing chamber 12 near the fresh air valve 6 and is suitable for preventing rainwater from being sucked into the air conditioning system; and a pressure protection valve 7, which is installed on the side of the condensing chamber 12 near the evaporation chamber 11 and is suitable for automatically cutting off the power supply circuit of the compressor 4 or triggering an alarm when the pressure abnormally rises or drops to a preset value to prevent damage to the air conditioning system.

[0031] According to the embodiments of the present disclosure, the air conditioning unit is installed in the rail vehicle body in either an embedded or platform-type manner. Embedded installation allows for a seamless transition between the air conditioning system and the roof curve, reducing the space occupied by the vehicle roof, lowering aerodynamic drag, and minimizing noise transmission. Platform-type installation allows for compatibility with air conditioning systems with larger cooling capacities, while also improving installation efficiency.

[0032] According to an embodiment of the present disclosure, the air conditioning system further includes an air conditioning controller (not shown), electrically connected to the ventilators 2 and configured to separately adjust the rotational speed of each group of ventilators 2. Through the above technical solution, the air conditioning controller separately controls the rotational speed of each group of ventilators 2, achieving reasonable distribution of air volume within the vehicle with simple and reliable operation.

[0033] According to an embodiment of the present disclosure, the air conditioning controller is further configured to switch the speed mode based on a status signal indicating whether the train door is open or closed, and an operating signal indicating whether the train is stationary or moving. Specifically, the air conditioning controller controls the ventilator 2 to reduce the wind speed based on a signal indicating that the train door is open or stationary, and increases the speed of the ventilator 2 based on a signal indicating that the train door is closed and the train is moving. Through the above technical solution, the air conditioning controller can switch the speed of the ventilator 2 based on the train signal, so that when the train door is closed or stationary, the wind speed is reduced, thereby reducing air conditioning noise, while at the same time increasing the wind speed when the train door is closed and moving, thereby ensuring the operating efficiency of the air conditioning system.

[0034] According to an embodiment of another aspect of the present disclosure, a control method for a low-noise rail vehicle air-conditioning system is provided, which is applied to the air-conditioning system as described above, and includes: detecting a train status signal; when a signal is detected that the train is in an open door or stationary state upon arrival at a station, controlling the speed of the ventilator to decrease so as to reduce the air supply volume and reduce the noise generated by the air-conditioning system in the vehicle; when a signal is detected that the train is in a closed door and normal operating state, controlling the speed of the ventilator to increase to a normal operating level.

[0035] According to the embodiments of the present disclosure, the wind speed is reduced to reduce the noise inside the vehicle when the vehicle is stationary or with the door open, and the fan wind speed is increased to the rated wind speed to enable the air-conditioning system to operate normally when the train door is closed or running, thereby reducing the noise inside the vehicle while ensuring the operating efficiency of the air-conditioning system.

[0036] 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 low-noise rail vehicle air conditioning system, installed in a rail vehicle body, comprising: Multiple groups of air-conditioning units, each group of air-conditioning units comprising: a housing, the housing being formed into an evaporation chamber (11) and a condensation chamber (12); and At least two sets of ventilators (2), installed inside the evaporation chamber (11), suitable for delivering cold air; and An air duct (3) is formed at the air outlet of the ventilator (2) and connects the air outlet of the ventilator (2) to the outside of the air conditioning system; The bottom of the evaporation chamber (11) is provided with a lower convex portion (111), so that the angle between the axis of the air outlet of the ventilator (2) and the horizontal plane forms a first angle.

2. The low-noise rail vehicle air conditioning system according to claim 1, wherein: The first angle is 0-10°.

3. The low-noise rail vehicle air conditioning system according to claim 1, wherein: The lower convex portion (111) protrudes downward to the interior of the vehicle body, and the vehicle body is provided with an opening whose size matches the outline of the lower convex portion (111).

4. The low-noise rail vehicle air conditioning system according to claim 1, wherein: The bottom of the air conditioning unit and the air duct are independently arranged.

5. The low-noise rail vehicle air conditioning system according to claim 4, wherein: Each group of the air-conditioning units is of the same specification, and each group of the air-conditioning units is detachably connected to the air duct (3).

6. The low-noise rail vehicle air conditioning system according to claim 1, wherein: Each of the air conditioning units further comprises: A compressor (4) is installed inside the condensing chamber (12); A fresh air valve is installed in the condensation chamber (12) on a side close to the evaporation chamber (11); A condensing fan (5) is installed on the top of the condensing chamber (12).

7. The low-noise rail vehicle air conditioning system according to claim 1, wherein: The air conditioning unit is installed in the rail vehicle body in an embedded or platform manner.

8. The low-noise rail vehicle air conditioning system according to claim 1, wherein: It also includes an air conditioning controller electrically connected to the ventilators (2) and configured to separately adjust the wind speed of each group of ventilators (2).

9. The low-noise rail vehicle air conditioning system according to claim 8, wherein: The air conditioning controller is further configured to switch the speed mode based on a state signal indicating whether a train door is open or closed and an operation signal indicating whether the train is stationary or moving.

10. A method for controlling a low-noise rail vehicle air conditioning system according to any one of claims 1 to 9, comprising: Detect train status signals; When a signal is detected that the train is in the state of opening the door at the station or is stationary, the speed of the ventilator is controlled to decrease to reduce the air supply volume and reduce the noise generated by the air conditioning system in the train; When a signal indicating that the train is in a door-closed and running state is detected, the rotation speed of the ventilator is controlled to increase to the rated wind speed.

Images