Waste discharge device and rail traffic air conditioning unit

Abstract

The invention relates to the technical field of air conditioners, in particular to a waste discharge device and a rail traffic air conditioning unit. The waste discharge device comprises a shell, a partition plate and a valve plate. The shell is provided with a containing cavity and an opening communicated with the containing cavity, the partition plate is arranged in the containing cavity and divides the containing cavity into an air inlet cavity and an air outlet cavity, the partition plate divides the opening into an air inlet communicated with the air inlet cavity and an air outlet communicated with the air outlet cavity, and the air inlet cavity is communicated with a waste exhaust duct of a vehicle through the air inlet. The air outlet cavity communicates with an air inlet of the outdoor heat exchanger through an air outlet. One end of the valve plate is movably hinged to the partition plate or the shell, and the air vent can communicate with the air inlet cavity and the air outlet cavity through the valve plate. According to the waste discharge device and the rail transit air conditioning unit, the problem that the utilization rate of waste gas discharged by an existing waste discharge device is low is solved.

Description

Technical Field

[0001] The present application relates to the field of air conditioning technology, and in particular to a waste gas discharge device and a rail transit air conditioning unit. Background Art

[0002] With the rapid development of rail vehicles, rail vehicles have become a common means of transportation for people to travel, and people have higher and higher requirements for the air quality and comfort inside rail vehicles. The exhaust device can discharge the exhaust gas inside the vehicle into the external environment, which is the key to ensuring the air quality inside the rail vehicle.

[0003] At present, the exhaust gas discharged by the exhaust device is usually discharged directly into the external environment. Taking the refrigeration condition as an example, when the air conditioning unit is cooling, the temperature of the air inside the car is low. When the exhaust gas is directly discharged into the external environment, the coldness carried by the exhaust gas itself is not well utilized. Summary of the invention

[0004] Based on this, it is necessary to provide a waste gas discharge device and a rail transit air-conditioning unit to solve the problem of low utilization rate of waste gas discharged by the existing waste gas discharge device.

[0005] The present application provides a waste exhaust device, which includes a shell, a partition and a valve plate, the shell is provided with a accommodating chamber and an opening connected to the accommodating chamber, the partition is arranged in the accommodating chamber and divides the accommodating chamber into an air inlet chamber and an air outlet chamber, and the partition divides the opening into an air inlet connected to the air inlet chamber and an air outlet connected to the air outlet chamber, the air inlet chamber is connected to the waste exhaust duct of the vehicle through the air inlet, and the air outlet chamber is connected to the air inlet of an outdoor heat exchanger through the air outlet; the partition is provided with an air vent, one end of the valve plate is movably hinged to the partition or the shell, and the air vent can be connected to the air inlet chamber and the air outlet chamber through the valve plate.

[0006] In one of the embodiments, when the air pressure in the air inlet chamber is greater than the air pressure in the air outlet chamber, and the air pressure difference between the air inlet chamber and the air outlet chamber is less than or equal to a preset pressure value, the valve sheet sealing cover is arranged on the air vent, and the air vent is not connected to the air inlet chamber and the air outlet chamber; when the air pressure in the air inlet chamber is greater than the air pressure in the air outlet chamber, and the air pressure difference between the air inlet chamber and the air outlet chamber is greater than the preset pressure value, the valve sheet can move in a direction away from the air vent, and the air vent is connected to the air inlet chamber and the air outlet chamber.

[0007] In one embodiment, the shell includes a top plate, and the partition is inclined or vertically arranged relative to the top plate. When the partition is inclined relative to the top plate, the inclined surface of the partition close to the air outlet cavity is arranged toward the top plate, and the valve plate is arranged on the side of the partition close to the air outlet cavity.

[0008] In one embodiment, the angle A formed by the partition plate and the top plate satisfies 45°≤A≤90°.

[0009] In one embodiment, the shell further includes a first side plate and a second side plate spaced apart from the partition, and a vertical distance from an end of the second side plate away from the top plate to the top plate is smaller than a vertical distance from an end of the partition away from the top plate to the top plate.

[0010] In one embodiment, an angle B formed by the second side plate and the top plate satisfies 0°<B≤60°.

[0011] In one of the embodiments, when the valve plate moves in a direction away from the vent, the end of the valve plate away from its hinge can abut against the top plate; the length M of the top plate from one end connected to the partition plate to one end connected to the second side plate, and the length N of the valve plate from one end connected to the hinge to one end away from the hinge, satisfy, M>N.

[0012] In one of the embodiments, when the valve plate moves in a direction away from the vent, an end of the valve plate away from its hinge can abut against the second side plate.

[0013] In one of the embodiments, the waste discharge device also includes a waste discharge grille, which is arranged at the air outlet. The waste discharge grille includes a main body, and the main body is provided with a waste discharge port. The waste discharge port connects the air outlet cavity and the air inlet of the outdoor heat exchanger, and a plurality of cross-arranged barrier ribs are connected in the waste discharge port.

[0014] In one embodiment, an angle C formed between the main body and the top plate satisfies 0°<C≤30°.

[0015] In one of the embodiments, there are multiple vents along a preset length direction, and the multiple vents are spaced apart on the partition along the preset length direction; the valve plate includes multiple slices, the slices and the vents are arranged one by one, and each of the vents can be covered with the slice; there are multiple waste outlets, the multiple waste outlets are arranged corresponding to the multiple vents, and the total flow area of ​​the multiple waste outlets is greater than or equal to the total flow area of ​​the multiple vents.

[0016] The present application also provides a rail transit air-conditioning unit, which includes a body, an outdoor heat exchanger and the exhaust device described in any one of the above embodiments, the outdoor heat exchanger and the exhaust device are installed in the body; the body is provided with a main air inlet and a main air outlet, the outdoor heat exchanger includes a heat exchange fan and a heat exchange tube group, the outdoor air enters the body through the main air inlet, the exhaust gas enters the body through the outlet of the exhaust device, and after the exhaust gas is mixed with the outdoor air, it is discharged from the body through the heat exchange tube group, the heat exchange fan and the main air outlet in sequence.

[0017] In one embodiment, the heat exchange tube group and the machine body form a first receiving portion connected to the main air inlet and a second receiving portion connected to the main air outlet, the waste exhaust device is installed in the first receiving portion, and the heat exchange fan is arranged in the second receiving portion; the outlet of the waste exhaust device is arranged in a direction close to the heat exchange tube group; or, the outlet of the waste exhaust device is arranged in a direction close to the main air inlet.

[0018] In one of the embodiments, the vertical distance H between the waste discharge device and the heat exchange tube group satisfies H≥50mm.

[0019] In one embodiment, the length P of the waste discharge device along the preset height direction and the depth Q of the first receiving portion along the preset height direction satisfy P≤Q / 2.

[0020] Compared with the prior art, the exhaust gas discharge device and rail transit air-conditioning unit provided in the present application connect the air outlet of the exhaust gas discharge device to the air inlet of the outdoor heat exchanger, so that the exhaust gas discharged by the exhaust gas discharge device can participate in the heat exchange of the outdoor heat exchanger, thereby meeting the cooling or heating needs of the outdoor heat exchanger, greatly improving the utilization rate of the exhaust gas, and thus significantly improving the energy efficiency of the rail transit air-conditioning unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 A partial structural schematic diagram of a rail transit air conditioning unit according to an embodiment of the present application;

[0023] Figure 2 A cross-sectional view of a partial structure of a rail transit air conditioning unit according to an embodiment of the present application;

[0024] Figure 3 for Figure 2 The enlarged view of point D in the middle;

[0025] Figure 4 A schematic diagram of the structure of a waste discharge device according to an embodiment of the present application Figure 1 ;

[0026] Figure 5 A schematic diagram of the structure of a waste discharge device according to an embodiment of the present application Figure 2 ;

[0027] Figure 6 A schematic structural diagram of a waste discharge device in a closed state according to an embodiment of the present application;

[0028] Figure 7 A side view of a waste discharge device in a closed state according to an embodiment of the present application;

[0029] Figure 8 A schematic structural diagram of a waste discharge device in an open state according to an embodiment of the present application;

[0030] Fig. 9 A side view of a waste discharge device in an open state according to an embodiment of the present application;

[0031] Fig.10 A partial structural schematic diagram of a waste discharge grille according to an embodiment of the present application.

[0032] The symbols in the figure mean the following:

[0033] 100. Rail transit air conditioning unit; 10. Waste discharge device; 11. Shell; 111. Accommodating chamber; 1111. Air inlet chamber; 1112. Air outlet chamber; 112. Opening; 1121. Air inlet; 1122. Air outlet; 113. Top plate; 1131. First support plate; 1132. Second support plate; 114. Side plate assembly; 1141. First side plate; 1142. Second side plate; 1143. First end plate; 1144. Second end plate; 12. Partition plate; 121. Vent; 122. Flanging structure; 13. Valve plate; 131, segment; 14, waste discharge grille; 141, first connection part; 142, second connection part; 143, main body; 1431, waste discharge port; 144, barrier rib; 15, outlet; 16, first fixing plate; 17, second fixing plate; 18, third fixing plate; 20, machine body; 21, main air inlet; 22, main air outlet; 23, first receiving part; 24, second receiving part; 25, drain outlet; 30, outdoor heat exchanger; 31, heat exchange fan; 32, heat exchange tube group; 321, heat exchange tube row. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0035] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0037] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are in contact indirectly through an intermediate medium. Moreover, a first feature being “above”, “above”, or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0039] With the rapid development of rail vehicles, rail vehicles have become a common means of transportation for people to travel, and people have higher and higher requirements for the air quality and comfort inside rail vehicles. The exhaust device can discharge the exhaust gas inside the vehicle into the external environment, which is the key to ensuring the air quality inside the rail vehicle.

[0040] At present, the exhaust gas discharged by the exhaust device is usually discharged directly into the external environment. Taking the refrigeration condition as an example, when the air conditioning unit is cooling, the temperature of the air inside the car is low. When the exhaust gas is directly discharged into the external environment, the coldness carried by the exhaust gas itself is not well utilized.

[0041] See also Figure 1-Figure 9 In order to solve the problem of low utilization rate of waste gas discharged by existing waste discharge devices, the present application provides a waste discharge device 10 and a rail transit air conditioning unit 100. The waste discharge device 10 includes a shell 11, a partition 12 and a valve plate 13.

[0042] The housing 11 is provided with a housing chamber 111 and an opening 112 connected to the housing chamber 111. The partition 12 is provided in the housing chamber 111 and divides the housing chamber 111 into an air inlet chamber 1111 and an air outlet chamber 1112. The partition 12 divides the opening 112 into an air inlet 1121 connected to the air inlet chamber 1111 and an air outlet 1122 connected to the air outlet chamber 1112. The air inlet chamber 1111 is connected to the exhaust air duct of the vehicle through the air inlet 1121 (which may be directly connected or indirectly connected, the same below), and the air outlet chamber 1112 is connected to the air inlet of the outdoor heat exchanger 30 through the air outlet 1122. The partition 12 is provided with an air vent 121. One end of the valve plate 13 is movably hinged to the partition 12 or the housing 11. The air vent 121 can connect the air inlet chamber 1111 and the air outlet chamber 1112 through the valve plate 13.

[0043] When the air pressure in the air inlet chamber 1111 is greater than the air pressure in the air outlet chamber 1112, and the air pressure difference between the air inlet chamber 1111 and the air outlet chamber 1112 is less than or equal to a preset pressure value, the valve plate 13 sealing cover is arranged on the air vent 121 to separate the air inlet chamber 1111 and the air outlet chamber 1112, that is, the air vent 121 is not connected to the air inlet chamber 1111 and the air outlet chamber 1112.

[0044] When the air pressure in the air inlet chamber 1111 is greater than the air pressure in the air outlet chamber 1112, and the air pressure difference between the air inlet chamber 1111 and the air outlet chamber 1112 is greater than a preset pressure value, the valve plate 13 can move in a direction away from the air vent 121 to open the air vent 121, that is, the air vent 121 connects the air inlet chamber 1111 and the air outlet chamber 1112.

[0045] It should be noted that, in order to ensure a moderate balance of air pressure, the air pressure inside the vehicle is usually positive, that is, greater than the constant atmospheric pressure outdoors, and the air pressure inside the vehicle is usually controlled at 0-50 Pa. The air pressure of the air inlet cavity 1111 is substantially the same as the air pressure inside the vehicle, and the air pressure of the air outlet cavity 1112 is less than or equal to the constant atmospheric pressure outdoors.

[0046] When the air pressure of the air inlet cavity 1111 is greater than the air pressure of the air outlet cavity 1112, and the air pressure difference between the air inlet cavity 1111 and the air outlet cavity 1112 is less than or equal to the preset pressure value, the air pressure in the vehicle is relatively small, so the pressure difference force cannot effectively push the valve plate 13, and the valve plate 13 will cover the vent 121 to prevent the air in the vehicle from flowing out through the vent 121, thereby ensuring that a relatively stable positive pressure state can be maintained in the vehicle to improve the comfort of passengers.

[0047] When the air pressure of the air inlet chamber 1111 is greater than the air pressure of the air outlet chamber 1112, and the air pressure difference between the air inlet chamber 1111 and the air outlet chamber 1112 is greater than the preset pressure value. At this time, the gas pressure in the vehicle is relatively large, and the pressure difference force can effectively push the valve plate 13, and the valve plate 13 will open to open the vent 121 on the partition 12, and the exhaust gas in the air inlet chamber 1111 will flow to the air outlet chamber 1112 through the vent 121, and finally be discharged through the outlet 15 of the exhaust device 10. When a certain amount of gas in the vehicle is discharged, the air pressure difference between the air inlet chamber 1111 and the air outlet chamber 1112 decreases until it is less than the preset pressure value, and the valve plate 13 will cover the vent 121 again to prevent the gas in the vehicle from continuing to be discharged.

[0048] Further, taking the refrigeration condition as an example, the indoor heat exchanger of the rail transit air conditioning unit 100 is used for refrigeration. At this time, the indoor heat exchanger is an evaporator, and the low-temperature refrigerant in the evaporator exchanges heat with the air in the car, so that the temperature in the car is relatively low, so the gas in the car has abundant cold capacity. Since the exhaust gas in the car discharged by the exhaust device 10 has abundant cold capacity, and the exhaust device 10 is connected to the air inlet of the outdoor heat exchanger 30 (as a condenser) through the air outlet 1122, the low-temperature exhaust gas discharged by the exhaust device 10 can participate in the heat exchange of the high-temperature refrigerant in the outdoor heat exchanger 30, which is beneficial to improve the condensation effect of the high-temperature refrigerant in the outdoor heat exchanger 30 and improve the supercooling degree. That is, the exhaust device 10 provided in the present application realizes the effective utilization of the exhaust gas in the car and greatly reduces the energy consumption of the entire rail transit air conditioning unit 100.

[0049] Similarly, in the heating condition, the indoor heat exchanger is used as a condenser, and the gas inside the vehicle has a high heat content. The outdoor heat exchanger 30 is used as an evaporator, which can absorb the heat in the exhaust gas discharged by the exhaust device 10, which is conducive to reducing frost, thereby ensuring the normal operation of the outdoor heat exchanger 30, and further improving the energy efficiency ratio of the rail transit air conditioning unit 100.

[0050] In summary, with such a configuration, the exhaust gas discharged by the exhaust device 10 can participate in the heat exchange of the outdoor heat exchanger 30, greatly improving the utilization rate of the exhaust gas and meeting the cooling or heating needs of the outdoor heat exchanger 30, thereby significantly improving the energy efficiency of the rail transit air-conditioning unit 100.

[0051] This application is specifically described using refrigeration conditions as an example.

[0052] Embodiment 1

[0053] In this embodiment, if Figure 4-Figure 9 As shown, the housing 11 includes a top plate 113 and a side plate assembly 114. The top plate 113 is sealed to one end of the side plate assembly 114, and the top plate 113 and the side plate assembly 114 surround and form a receiving chamber 111, and the opening 112 is provided at one end of the receiving chamber 111 away from the top plate 113.

[0054] It should be noted that, when the exhaust device 10 is installed in the rail transit air-conditioning unit 100, the top plate 113 of the shell 11 is arranged horizontally or approximately horizontally.

[0055] Further, the partition 12 is arranged obliquely or vertically relative to the top plate 113, and when the partition 12 is arranged obliquely relative to the top plate 113, the inclined surface of the partition 12 close to the air outlet cavity 1112 is arranged toward the top plate 113, and the valve plate 13 is arranged on the side of the partition 12 close to the air outlet cavity 1112. When the air pressure difference between the air inlet cavity 1111 and the air outlet cavity 1112 is less than or equal to a preset pressure value, the valve plate 13 can be sealed and covered at the vent 121 under the action of its own gravity. When the air pressure difference between the air inlet cavity 1111 and the air outlet cavity 1112 is greater than a preset pressure value, the valve plate 13 can open the vent 121 under the action of air pressure.

[0056] That is, in this embodiment, the valve plate 13 controls the opening angle of the valve plate 13 under the action of gravity and pressure difference force, so as to automatically realize the opening and closing of the valve plate 13 to the vent 121, so as to adjust and control the exhaust volume of the exhaust device 10. It can not only avoid the situation that the air pressure inside the rail vehicle is high during operation, improve the exhaust effect of the exhaust device 10, but also ensure that the air pressure inside and outside the vehicle is in a relatively stable state, thereby improving the comfort of passengers. In addition, the overall structure is simple and easy to process, which can reduce the processing cost. Of course, as other embodiments, the valve plate 13 can be electrically controlled in addition to mechanical control, such as controlling the opening and closing of the vent 121 by the valve plate 13 when the preset conditions are met.

[0057] Furthermore, in one embodiment, the angle A formed by the partition plate 12 and the top plate 113 satisfies 45°≤A≤90°, which is helpful to reduce the difficulty of rotating the valve plate 13, thereby realizing the natural opening and closing of the vent 121.

[0058] When A is less than 45°, the angle between the partition 12 and the top plate 113 is too small, and the valve plate 13 is greatly affected by gravity, which makes it difficult for the valve plate 13 to open. When A is greater than 90°, that is, the partition 12 is inclined toward the direction close to the air inlet chamber 1111, at this time, the valve plate 13 cannot naturally close the vent 121 under the action of gravity. Among them, the value of the angle A formed by the partition 12 and the top plate 113 can be 50°, 60°, 70° or 80°, etc., which are not listed here one by one.

[0059] When the rail transit vehicle is in operation, the rail transit air conditioning unit 100 is usually in operation, and negative pressure will be formed at the heat exchange fan 31 of the outdoor heat exchanger 30. This negative pressure will have a certain attraction to the exhaust gas discharged by the exhaust device 10, that is, it will affect the pressure difference between the air inlet cavity 1111 and the air outlet cavity 1112, thereby having a certain impact on the movement of the valve plate 13. Therefore, the impact of the negative pressure of the heat exchange fan 31 on the valve plate 13 needs to be considered during the design to prevent the negative pressure generated when the heat exchange fan 31 is running from causing the valve plate 13 to fail to close.

[0060] When the pressure difference between the air inlet cavity 1111 and the air outlet cavity 1112 is small, at this time, the minimum pressure difference value that the valve plate 13 can open, that is, the preset pressure value should be greater than or equal to the negative pressure value generated by the heat exchange fan 31 at the air outlet cavity 1112, and at the same time, ensure that the preset pressure value is less than the maximum air pressure value in the vehicle. For example, when the preset pressure value is 40Pa (the gravity of the valve plate 13 can be set according to the preset pressure value), the negative pressure value at the air outlet cavity 1112 is 20Pa, when the air pressure value in the vehicle is greater than 20Pa, the valve plate 13 will open, and when the air pressure value in the vehicle is lower than 20Pa, the valve plate 13 will close.

[0061] When the pressure difference between the air inlet chamber 1111 and the air outlet chamber 1112 is large, for example, when the preset pressure value is 40Pa and the negative pressure value at the air outlet chamber 1112 is greater than 40Pa, the maximum opening of the valve plate 13 can be reduced, that is, the exhaust gas discharge per unit time can be reduced to ensure positive pressure in the rail transit vehicle, thereby ensuring the comfort of passengers.

[0062] In one embodiment, if Figure 4 As shown, the side plate assembly 114 includes a first side plate 1141 and a second side plate 1142 disposed on both sides of the partition 12 and spaced apart from the partition 12, and the side plate assembly 114 also includes a first end plate 1143 and a second end plate 1144 connected to both ends of the partition 12. The partition 12, the first side plate 1141, part of the top plate 113, part of the first end plate 1143 and part of the second end plate 1144 form an air inlet cavity 1111, and the partition 12, the second side plate 1142, part of the top plate 113, part of the first end plate 1143 and part of the second end plate 1144 form an air outlet cavity 1112.

[0063] In this way, the structure of the side plate assembly 114 is simple, and the processing efficiency of the side plate assembly 114 can be improved.

[0064] The portion of the top plate 113 located within the partition plate 12 and the first side plate 1141 is defined as a first support plate 1131 , and the portion of the top plate 113 located within the partition plate 12 and the second side plate 1142 is defined as a second support plate 1132 .

[0065] For ease of explanation, the direction from the first end plate 1143 to the second end plate 1144 is defined as the preset length direction, the direction from the opening 112 to the bottom wall of the accommodating cavity 111 is defined as the preset height direction, and the direction from the first side plate 1141 to the second side plate 1142 is defined as the preset width direction, and the preset length direction, the preset height direction and the preset width direction are perpendicular to each other.

[0066] In one embodiment, the first side plate 1141 and the first support plate 1131 are formed by bending sheet metal as a whole, the second side plate 1142, the second support plate 1132 and the partition plate 12 are formed by bending sheet metal as a whole, and the connection between the second support plate 1132 and the partition plate 12 is connected to the first support plate 1131 as a whole by welding or riveting.

[0067] In another embodiment, the first side plate 1141, the first support plate 1131 and the partition plate 12 are formed by bending sheet metal as a whole, the second side plate 1142 and the second support plate 1132 are formed by bending sheet metal as a whole, and the connection between the first support plate 1131 and the partition plate 12 is connected to the second support plate 1132 as a whole by welding or riveting.

[0068] In another embodiment, the top plate 113 is an integrally formed structure, and the first side plate 1141, the top plate 113 and the second side plate 1142 are integrally formed by bending sheet metal, and the top plate 113 is connected to the partition plate 12 as a whole by welding or riveting.

[0069] In this way, the shell 11 and the partition 12 can be formed in various ways, and a suitable solution can be selected for processing and assembly according to actual conditions, thereby improving the assembly efficiency of the overall structure of the waste discharge device 10.

[0070] In one embodiment, the shell 11 , the partition plate 12 and the valve plate 13 are all made of aluminum alloy or stainless steel, thereby reducing the material cost of the waste discharge device 10 .

[0071] Furthermore, in one embodiment, the housing 11, the partition plate 12 and the valve plate 13 are provided with an anti-condensation coating or paint layer, so that the service life of the waste discharge device 10 can be increased.

[0072] In one embodiment, the exhaust device 10 further includes a first fixing plate 16, a second fixing plate 17 and a third fixing plate 18. The first fixing plate 16 is connected to one end of the first side plate 1141 away from the top plate 113, the second fixing plate 17 is connected to one end of the first end plate 1143 away from the top plate 113, and the third fixing plate 18 is connected to one end of the second end plate 1144 away from the top plate 113, so that the exhaust device 10 can be connected to the rail transit air conditioning unit 100 through the first fixing plate 16, the second fixing plate and the third fixing plate 18.

[0073] In this way, the exhaust gas discharge device 10 can be installed and fixed on the rail transit air-conditioning unit 100, thereby improving the installation firmness of the exhaust gas discharge device 10.

[0074] Specifically, the first fixing plate 16, the second fixing plate 17 and the third fixing plate 18 can be installed on the rail transit air-conditioning unit 100 by fasteners such as bolts, thereby facilitating the installation and disassembly of the exhaust device 10 and improving the convenience of subsequent maintenance.

[0075] Furthermore, in one embodiment, the first side plate 1141 and the first fixing plate 16 are integrally formed, the first end plate 1143 and the second fixing plate 17 are integrally formed, and the second end plate 1144 and the third fixing plate 18 are integrally formed. This helps to improve the connection strength between the first side plate 1141 and the first fixing plate 16, the first end plate 1143 and the second fixing plate 17, and the second end plate 1144 and the third fixing plate 18.

[0076] In one embodiment, a vertical distance between an end of the second side plate 1142 away from the top plate 113 and the top plate 113 is smaller than a vertical distance between an end of the partition plate 12 away from the top plate 113 and the top plate 113 .

[0077] That is, when the exhaust device 10 is installed on the rail air conditioning unit 100, there is a certain distance between the second side plate 1142 and the installation surface of the exhaust plate device on the rail air conditioning unit 100, and an air outlet groove structure is formed by clamping, and the air outlet groove is defined as the outlet 15 of the exhaust device 10. The outlet 15 of the exhaust device 10 is connected with the air outlet 1122 of the air outlet cavity 1112, so that the exhaust gas in the vehicle is discharged from the outlet 15 of the exhaust device 10.

[0078] Since the heat exchange fan 31 will have a certain impact on the pressure of the air outlet cavity 1112, the outlet 15 of the waste discharge device 10 should not be too large, that is, the vertical distance between the end of the second side plate 1142 away from the top plate 113 and the top plate 113 and the vertical distance between the end of the partition 12 away from the top plate 113 and the top plate 113 need to be controlled.

[0079] Specifically, an angle B is formed between the second side plate 1142 and the top plate 113, and the size of the outlet 15 of the exhaust device 10 can be controlled by setting the angle A and the angle B, thereby preventing the negative pressure generated by the heat exchange fan 31 from having too much influence on the valve plate 13. In addition, it prevents adverse factors such as rainwater or debris from entering the exhaust device 10 through the outlet 15 of the exhaust device 10 and entering the vehicle through the exhaust device 10, thereby improving the reliability of the overall operation of the rail transit air conditioning unit 100.

[0080] Furthermore, in one embodiment, the angle B satisfies 0°<B≤60°. Since the partition plate 12 is inclined relative to the top plate 113, by controlling the angle between the second side plate 1142 and the top plate 113, it is helpful to ensure the volume of the air outlet cavity 1112, and the exhaust gas entering the air outlet cavity 1112 from the vent 121 can be discharged more smoothly from the outlet 15 of the exhaust device 10 through the outlet 1122, thereby greatly improving the circulation efficiency of the exhaust gas.

[0081] In one embodiment, the cross-sectional area of ​​the valve plate 13 is greater than the cross-sectional area of ​​the vent 121. Thus, when the valve plate 13 is in a closed state, the valve plate 13 can completely block the vent 121 to prevent gas leakage in the vehicle, thereby improving the reliability of the exhaust device 10.

[0082] Further, in one embodiment, along the preset length direction, there are multiple vents 121, and the multiple vents 121 are spaced apart along the preset length direction on the partition 12. The valve plate 13 includes multiple segments 131, and the segments 131 and the vents 121 are arranged one by one, and each vent 121 can be covered with a segment 131.

[0083] By providing a plurality of vents 121 and each vent 121 being provided with a corresponding slice 131 , the area of ​​a single slice 131 can be reduced to a certain extent. Compared with an integral valve plate 13 , the weight of a single slice 131 can be reduced, thereby facilitating the rotation of each slice 131 and realizing the opening of the corresponding vent 121 .

[0084] Specifically, each segment 131 is connected to the partition 12 or the top plate 113 by hinged connection. Therefore, a certain width should be reserved at the position of the partition 12 above the vent 121 to fix the hinge or bracket, etc. In addition, along the preset length direction, a certain width can also be reserved between adjacent vents 121 according to the structural strength requirements of the partition 12.

[0085] Furthermore, the number of the vents 121 can be determined according to the length of the waste discharge device 10 along a preset length direction. For example, the number of the vents 121 can be set to two, four or six, etc., as long as the opening and closing of the valve plate 13 can be facilitated.

[0086] In one embodiment, when the valve plate 13 moves in a direction away from the vent 121, the end of the valve plate 13 away from its hinge can abut against the top plate 113. That is, at this time, the rotation of the valve plate 13 is not blocked by the second side plate 1142, and the valve plate 13 can reach its maximum opening, thereby improving the flow performance of the exhaust gas.

[0087] However, at this time, the flow of the exhaust gas will be affected by the second side plate 1142, so the second side plate 1142 should be further bent toward the direction close to the partition plate 12 to guide the exhaust gas to a certain extent, guide the exhaust gas to flow to the outlet 1122 of the outlet cavity 1112, and finally discharge through the outlet 15 of the exhaust device 10. In addition, the bending of the second side plate 1142 correspondingly reduces the area of ​​the outlet 15 of the exhaust device 10, thereby reducing the influence of the heat exchange fan 31 on the rotation of the valve plate 13.

[0088] Further, in one embodiment, if Fig. 9 As shown, the length M of the top plate 113 from one end connected to the partition plate 12 to one end connected to the second side plate 1142, that is, the length of the second support plate 1132 is M. The length N of the valve plate 13 from one end connected to the hinge to one end away from the hinge satisfies M>N.

[0089] That is, by setting the length M of the second support plate 1132 along the preset width direction to be greater than the length of the valve plate 13 itself, the valve plate 13 can be prevented from contacting the second side plate 1142, further improving the flow performance of the exhaust gas and reducing the processing cost of the valve plate 13.

[0090] In one embodiment, if Figure 8 and Fig. 9 As shown, when the valve plate 13 moves in a direction away from the vent 121 , one end of the valve plate 13 away from its hinged portion can abut against the second side plate 1142 .

[0091] In this way, the second side plate 1142 can limit the opening of the valve plate 13, thereby meeting the requirement of stable pressure difference between the inside and outside of the vehicle. Moreover, at this time, the flow of the exhaust gas is affected by the valve plate 13, and the valve plate 13 will play a certain role in guiding the exhaust gas, so as to facilitate guiding the exhaust gas to the outlet 1122 of the outlet cavity 1112. At this time, the maximum opening of the valve plate 13 can be achieved by adjusting the angle B and / or the angle A, that is, as the angle is adjusted, the maximum opening of the valve plate 13 is also adjusted accordingly.

[0092] During processing, the length N of the valve plate 13 and the inclination angles of the second side plate 1142 and the partition 12 (i.e., angle B and angle A) can be determined first. At this time, the opening of the valve plate 13 is also affected by the length M of the second support plate 1132 along the preset width direction. In this way, the opening of the valve plate 13 can be controlled by increasing or decreasing the length M of the second support plate 1132 in the preset width direction.

[0093] Furthermore, in one embodiment, a reinforcing structure (not shown) is provided at the joint between the second side plate 1142 and the valve plate 13. When the valve plate 13 moves away from the vent 121, one end of the valve plate 13 away from the partition 12 can abut against the reinforcing structure.

[0094] The reinforcement structure may be a reinforcement rib to improve the structural strength of the abutment between the second side plate 1142 and the valve plate 13 to prevent the second side plate 1142 from being deformed, thereby greatly increasing the service life of the waste discharge device 10.

[0095] Without limitation thereto, a reinforcement structure may also be provided at other places on the shell 11 or on the partition 12 , so as to ensure the structural strength of the shell 11 and further increase the service life of the waste discharge device 10 .

[0096] In one embodiment, if Figure 5-Figure 10 As shown, the waste discharge device 10 also includes a waste discharge grille 14, which is arranged at the air outlet 1122, and the waste discharge grille 14 is respectively connected to the partition 12 and the second side plate 1142, so that the air outlet cavity 1112 is connected to the air inlet of the outdoor heat exchanger 30, or the outlet 15 of the waste discharge device 10 through the waste discharge grille 14.

[0097] The exhaust grille 14 can prevent foreign matter from entering the exhaust device 10 through the outlet 15 of the exhaust device 10 and entering the interior of the vehicle through the exhaust device 10 , thereby improving the reliability of the exhaust device 10 during operation.

[0098] Furthermore, in one embodiment, the exhaust grille 14 is provided with an exhaust port 1431 communicating with the air outlet cavity 1112 and the air inlet of the outdoor heat exchanger 30. In this way, the exhaust grille 14 will not hinder the circulation of the exhaust gas.

[0099] Specifically, a plurality of cross-arranged barrier ribs 144 are connected inside the waste outlet 1431 to block foreign objects and the like.

[0100] In one embodiment, there are multiple waste outlets 1431, and the multiple waste outlets 1431 are correspondingly arranged with the multiple vents 121, and the total flow area of ​​the multiple waste outlets 1431 is greater than or equal to the total flow area of ​​the multiple vents 121, thereby facilitating the flow of waste gas.

[0101] However, it is not limited to this. Without hindering the flow of waste gas, the total flow area of ​​the multiple waste outlets 1431 can also be smaller than the total flow area of ​​the multiple vents 121. Specifically, the width of the waste outlets 1431 along the preset width direction is reduced, which is beneficial to reduce the width of the entire waste discharge device 10 along the preset width direction.

[0102] It should be noted that the flow area of ​​the waste outlet 1431 refers to the area of ​​the space in the waste outlet 1431 excluding the blocking ribs 144 .

[0103] In one embodiment, a flange structure 122 is provided at one end of the partition 12 away from the top plate 113, and the partition 12 is connected to the waste discharge grille 14 via the flange structure 122. In this way, the connection between the partition 12 and the waste discharge grille 14 is facilitated.

[0104] Further, in one embodiment, if Fig.10 As shown, the exhaust grille 14 includes a first connection portion 141, a second connection portion 142, and a main body portion 143 connecting the first connection portion 141 and the second connection portion 142. The air outlet cavity 1112 is connected to the air inlet of the outdoor heat exchanger 30 through the main body portion 143, that is, the exhaust port 1431 is provided on the main body portion 143. One end of the main body portion 143 is arranged at an angle with the first connection portion 141 and is connected to the flange structure 122 through the first connection portion 141, and the other end is arranged at an angle with the second connection portion 142 and is connected to the second side plate 1142 through the second connection portion 142.

[0105] By providing the first connection portion 141, the contact area between the waste discharge grille 14 and the flange structure 122 of the partition plate 12 can be increased, and by providing the second connection portion 142, the contact area between the waste discharge grille 14 and the second side plate 1142 can be increased. In this way, the waste discharge grille 14 can be more firmly installed on the partition plate 12 and the second side plate 1142, thereby improving the overall connection stability of the waste discharge device 10.

[0106] Specifically, the first connection portion 141 and the flange structure 122 can be fixedly connected by fasteners such as bolts to reduce the damage rate, and facilitate the installation and removal of the waste discharge grille 14, thereby facilitating the subsequent cleaning or replacement of the waste discharge grille 14. The second connection portion 142 can also be fixedly connected to the second side plate 1142 by fasteners such as bolts to further improve the connection strength and ensure that the waste gas can only be discharged through the waste discharge port 1431 of the waste discharge grille 14.

[0107] Of course, in other embodiments, the second connection portion 142 may also be attached only to the second side plate 1142 . In this way, the connection of the waste discharge grille 14 is simpler, and the assembly efficiency of the waste discharge grille 14 can be improved.

[0108] Furthermore, the waste discharge grille 14 is made of metal or plastic, preferably metal and is processed in one piece, so that it is convenient to connect directly with fasteners such as bolts, further reducing the damage rate.

[0109] In one embodiment, an included angle C formed between the main body 143 and the top plate 113 satisfies 0°<C≤30°.

[0110] In this way, there is a certain space between the exhaust port 1431 and the outlet 15 of the exhaust device 10, which can facilitate the exhaust gas to flow out. In addition, it can also avoid that the exhaust grille 14 has an angle that is too large, causing condensation water or rainwater to flow in and thus preventing water from flowing into the vehicle, or causing foreign objects to block the exhaust port 1431 and hinder the flow of exhaust gas.

[0111] To sum up, the exhaust device 10 provided in the present application has a simple structure, few parts, occupies a small space, can better realize the function of exhaust gas discharge, and by being arranged at the air inlet of the outdoor heat exchanger 30, the outdoor heat exchanger 30 can make full use of the cold energy in the exhaust gas, thereby improving the heat exchange efficiency of the outdoor heat exchanger 30, thereby greatly improving the energy efficiency ratio of the rail transit air-conditioning unit 100.

[0112] Embodiment 2

[0113] The structure of this embodiment is basically the same as that of the first embodiment, and the similarities are not repeated here. The differences are as follows:

[0114] In this embodiment, the waste discharge device 10 further includes a pressure sensor (not shown), a controller (not shown) and a drive motor (not shown). The controller is electrically connected to the pressure sensor and the drive motor, respectively, and the output end of the drive motor is connected to the valve plate 13. When the pressure sensor measures that the air pressure difference between the air inlet chamber 1111 and the air outlet chamber 1112 is less than or equal to a preset pressure value, the controller can control the valve plate 13 to close the vent 121 through the drive motor. When the pressure sensor measures that the air pressure difference between the air inlet chamber 1111 and the air outlet chamber 1112 is greater than a preset pressure value, the controller can control the valve plate 13 to open the vent 121 through the drive motor.

[0115] The controller can receive the pressure signal measured by the pressure sensor, and control the driving motor to close or open the valve plate 13 according to the pressure signal measured by the pressure sensor, and adjust the rotation angle of the valve plate 13 accordingly to adjust the opening of the valve plate 13. In this way, the opening and closing of the valve plate 13 is not affected by the pressure difference or gravity, so the influence of the heat exchange fan 31 on the valve plate 13 can be reduced, thereby realizing accurate control of exhaust gas emissions.

[0116] Specifically, the controller may be installed on the first end plate 1143 or the second end plate 1144 of the waste discharge device 10 at one end away from the accommodating chamber 111 to improve the overall integration performance.

[0117] The rail transit air conditioning unit 100 is usually also provided with a fresh air valve, which is used to provide fresh air into the vehicle.

[0118] In other embodiments, the control logic can also be compared with the opening of the fresh air valve to control the opening of the valve plate 13, adjust the exhaust air volume, and implement multi-speed regulation to achieve dynamic balance with the fresh air volume entering the vehicle.

[0119] In summary, the present application controls the opening and closing of the valve plate 13 by setting both automatic and electric modes, thereby meeting different usage needs. The installer can select a suitable structure for installation according to actual needs.

[0120] The present application also provides a rail transit air-conditioning unit 100 , which includes a body 20 , an outdoor heat exchanger 30 and a waste discharge device 10 as described in any one of the above embodiments, and the outdoor heat exchanger 30 and the waste discharge device 10 are installed in the body 20 .

[0121] It should be noted that when the waste discharge device 10 is installed in the machine body 20, the length direction of the waste discharge device 10 is the same as the length direction of the machine body 20, and both are preset length directions. The width direction of the waste discharge device 10 is the same as the width direction of the machine body 20, and both are preset width directions. The height direction of the waste discharge device 10 is the same as the height direction of the machine body 20, and both are preset height directions.

[0122] In one embodiment, if Figure 1-Figure 3 As shown, the machine body 20 is provided with a main air inlet 21 and a main air outlet 22, and the outdoor heat exchanger 30 includes a heat exchange fan 31 and a heat exchange tube group 32. Outdoor air enters the machine body 20 through the main air inlet 21, and exhaust gas enters the machine body 20 through the outlet 15 of the exhaust device 10, and after the exhaust gas is mixed with the outdoor air, it is discharged from the machine body 20 through the heat exchange tube group 32, the heat exchange fan 31 and the main air outlet 22 in sequence.

[0123] In this way, the gas discharged from the exhaust device 10 can be mixed with the gas in the external environment, and after heat exchange with the heat exchange tube group 32, it can be discharged from the main air outlet 22 through the heat exchange fan 31. In this way, the coldness in the exhaust gas is fully utilized, thereby improving the heat exchange efficiency of the heat exchange tube group 32, and then improving the energy efficiency ratio of the rail transit air conditioning unit 100. In addition, by using the coldness of the exhaust gas to improve the heat exchange efficiency of the outdoor heat exchanger 30, the volume of the heat exchange fins of the outdoor heat exchanger 30 and the air volume of the fan can be reduced, thereby saving the unit space and reducing costs.

[0124] Specifically, the main air inlet 21 is provided on the side wall of the machine body 20 along the preset width direction, and the main air outlet 22 is provided on the side wall of the machine body 20 along the preset height direction and directly facing the heat exchange fan 31. That is, the machine body 20 is a side air inlet and top air outlet structure.

[0125] In one embodiment, if Figure 3 As shown, the outlet 15 of the exhaust device 10 is arranged toward the direction close to the heat exchange tube group 32. In this way, the gas discharged from the exhaust device 10 can be preliminarily mixed with the external gas and directly used for heat exchange with the heat exchange tube group 32, thereby reducing the temperature of the heat exchange tube group 32 and improving the heat exchange effect of the outdoor heat exchanger 30.

[0126] In another embodiment, the outlet 15 of the exhaust device 10 is arranged toward the direction close to the main air inlet 21. In this way, the gas discharged from the exhaust device 10 can be fully mixed with the external gas, thereby improving the temperature uniformity of the heat exchange tube group 32 and further improving the heat exchange effect of the outdoor heat exchanger 30. In addition, such an arrangement can further reduce the influence of the negative pressure at the heat exchange fan 31 on the opening and closing of the valve plate 13.

[0127] When the heat exchange fan 31 is turned off, that is, the rail transit air conditioning unit 100 is in the ventilation mode, the exhaust gas may not participate in the heat exchange of the heat exchange tube group 32 .

[0128] The present application is specifically described by assuming that the outlet 15 of the waste discharge device 10 is arranged toward the heat exchange tube group 32 .

[0129] In one embodiment, the vertical distance H between the exhaust device 10 and the heat exchange tube group 32 satisfies H≥50 mm. In this way, a relatively closed space can be formed between the exhaust device 10 and the heat exchange tube group 32, thereby facilitating the flow of the exhaust gas and ensuring that the exhaust gas can fully and evenly exchange heat with the heat exchange tube group 32.

[0130] In one embodiment, if Figure 2 As shown, the heat exchange tube group 32 and the body 20 form a first receiving portion 23 connected to the main air inlet 21 and a second receiving portion 24 connected to the main air outlet 22 . The exhaust device 10 is installed in the first receiving portion 23 , and the heat exchange fan 31 is arranged in the second receiving portion 24 .

[0131] By installing the exhaust device 10 in the body 20, there is no need to set up an additional cavity structure for installing the exhaust device 10, the structure is more compact, does not affect the contour and flatness of the vehicle, and is more beautiful. In addition, it avoids adding additional wind resistance to the vehicle. And because the exhaust device 10 is subject to less wind resistance, there is no need to separately set up parts such as windshields and exhaust covers, which can reduce the volume and weight of the rail transit air conditioning unit 100 and reduce the cost of parts.

[0132] Specifically, the heat exchange tube group 32 includes two heat exchange tube rows 321, which are arranged relatively tilted, along the preset height direction and in the direction close to the main air outlet 22, and the distance between the two heat exchange tube rows 321 is expanding. The two heat exchange tube rows 321 separate the internal space of the body 20, and form a second receiving portion 24 located between the two heat exchange tube rows 321 and a first receiving portion 23 located between the heat exchange tube row 321 and the side wall of the body 20.

[0133] It can be understood that there are two first receiving parts 23, and each first receiving part 23 is correspondingly provided with a total air inlet 21 connected to itself, and is installed with a waste discharge device 10. That is, there is a shielding of the heat exchange pipe row 321 between the waste discharge device 10 and the heat exchange fan 31, so as to further reduce the influence of the heat exchange fan 31 on the valve plate 13. Usually, only one waste discharge device 10 can be set in each first receiving part 23. When the length of the first receiving part 23 is too long or there is a sheet metal partition inside, two or more waste discharge devices 10 can also be set in each first receiving part 23 according to actual needs.

[0134] Furthermore, the length of the waste discharge device 10 is less than or equal to the length of the first receiving portion 23 , thereby facilitating the installation of the waste discharge device 10 and enabling uniform heat exchange of the heat exchange tube group 32 .

[0135] Furthermore, in one embodiment, if Figure 3 As shown, the length P of the waste discharge device 10 along the preset height direction and the depth Q of the first receiving portion 23 along the preset height direction satisfy P≤Q / 2.

[0136] In this way, it is possible to avoid excessive shielding of the main air inlet 1121 by the exhaust device 10 , thereby ensuring that external air can enter the machine body 20 through the main air inlet 1121 , thereby ensuring normal heat exchange operation of the outdoor heat exchanger 30 .

[0137] In one embodiment, a sealing gasket or a sealing adhesive may be provided at the connection between the waste discharge device 10 and the body 20 to improve the sealing performance of the waste discharge device 10 .

[0138] In one embodiment, the exhaust device 10 is also provided with a sound-absorbing and heat-insulating component, which can be arranged in the gap at the connection of the exhaust device 10, so as to reduce the heat loss of the exhaust device 10 and reduce the noise generated when the exhaust gas flows out.

[0139] In one embodiment, the machine body 20 is further provided with a drain port 25 , through which rainwater or condensed water in the machine body 20 is collected and discharged, so as to avoid affecting the heat exchange of the heat exchange tube group 32 .

[0140] Furthermore, when the drain outlet 25 is arranged between the waste discharge device 10 and the heat exchange tube group 32, the drain outlet 25 should be arranged on a side close to the heat exchange tube group 32, so as to avoid the waste gas discharged from the waste discharge device 10 blowing rainwater or condensed water in the drain outlet 25, thereby affecting the uniform heat exchange between the waste discharge device 10 and the heat exchange tube group 32.

[0141] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0142] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. A waste discharge device, characterized in that: It comprises a housing (11), a partition (12) and a valve plate (13), The shell (11) is provided with a accommodating chamber (111) and an opening (112) connected to the accommodating chamber (111); the partition (12) is provided in the accommodating chamber (111) and divides the accommodating chamber (111) into an air inlet chamber (1111) and an air outlet chamber (1112); and the partition (12) divides the opening (112) into an air inlet (1121) connected to the air inlet chamber (1111) and an air outlet (1122) connected to the air outlet chamber (1112); the air inlet chamber (1111) is connected to a waste air duct of the vehicle through the air inlet (1121), and the air outlet chamber (1112) is connected to an air inlet of an outdoor heat exchanger (30) through the air outlet (1122); The partition (12) is provided with a vent (121), one end of the valve plate (13) is movably hinged to the partition (12) or the shell (11), and the vent (121) can communicate with the air inlet cavity (1111) and the air outlet cavity (1112) through the valve plate (13).

2. The waste discharge device according to claim 1, characterized in that: When the air pressure of the air inlet cavity (1111) is greater than the air pressure of the air outlet cavity (1112), and the air pressure difference between the air inlet cavity (1111) and the air outlet cavity (1112) is less than or equal to a preset pressure value, the valve plate (13) sealing cover is arranged on the air vent (121), and the air vent (121) does not communicate with the air inlet cavity (1111) and the air outlet cavity (1112); When the air pressure of the air inlet chamber (1111) is greater than the air pressure of the air outlet chamber (1112), and the air pressure difference between the air inlet chamber (1111) and the air outlet chamber (1112) is greater than the preset pressure value, the valve plate (13) can move in a direction away from the air vent (121), and the air vent (121) connects the air inlet chamber (1111) and the air outlet chamber (1112).

3. The waste discharge device according to claim 1, characterized in that: The shell (11) includes a top plate (113), and the partition plate (12) is arranged inclined or vertically relative to the top plate (113). When the partition plate (12) is arranged inclined relative to the top plate (113), the inclined surface of one side of the partition plate (12) close to the air outlet cavity (1112) is arranged toward the top plate (113), and the valve plate (13) is arranged on one side of the partition plate (12) close to the air outlet cavity (1112).

4. The waste discharge device according to claim 3, characterized in that: An included angle A formed by the partition plate (12) and the top plate (113) satisfies 45°≤A≤90°.

5. The waste discharge device according to claim 3 or 4, characterized in that: The shell (11) further comprises a first side plate (1141) and a second side plate (1142) which are spaced apart from the partition (12), wherein a vertical distance between an end of the second side plate (1142) away from the top plate (113) and the top plate (113) is smaller than a vertical distance between an end of the partition (12) away from the top plate (113) and the top plate (113).

6. The waste discharge device according to claim 5, characterized in that: An angle B formed by the second side plate (1142) and the top plate (113) satisfies 0°<B≤60°.

7. The waste discharge device according to claim 5, characterized in that: When the valve plate (13) moves in a direction away from the vent (121), an end of the valve plate (13) away from its hinged portion can abut against the top plate (113); The length M of the top plate (113) from one end connected to the partition (12) to one end connected to the second side plate (1142), and the length N of the valve plate (13) from one end connected to the hinge to one end away from the hinge, satisfy M>N.

8. The waste discharge device according to claim 5, characterized in that: When the valve plate (13) moves in a direction away from the vent (121), an end of the valve plate (13) away from its hinged portion can abut against the second side plate (1142).

9. The waste discharge device according to claim 3, characterized in that: The invention also comprises a waste discharge grille (14), wherein the waste discharge grille (14) is arranged at the air outlet (1122), and the waste discharge grille (14) comprises a main body (143), wherein the main body (143) is provided with a waste discharge port (1431), wherein the waste discharge port (1431) is connected to the air outlet cavity (1112) and the air inlet of the outdoor heat exchanger (30), and a plurality of cross-arranged barrier ribs (144) are connected inside the waste discharge port (1431).

10. The waste discharge device according to claim 9, characterized in that: An included angle C formed between the main body (143) and the top plate (113) satisfies 0°<C≤30°.

11. The waste discharge device according to claim 9 or 10, characterized in that: Along a preset length direction, the number of the vents (121) is multiple, and the multiple vents (121) are arranged on the partition (12) at intervals along the preset length direction; The valve plate (13) comprises a plurality of segments (131), the segments (131) and the vents (121) are arranged in one-to-one correspondence, and each vent (121) can be covered with the segment (131); The number of the waste discharge ports (1431) is multiple, the multiple waste discharge ports (1431) are arranged corresponding to the multiple vents (121), and the total flow area of ​​the multiple waste discharge ports (1431) is greater than or equal to the total flow area of ​​the multiple vents (121).

12. A rail transit air conditioning unit, characterized in that: It comprises a machine body (20), an outdoor heat exchanger (30) and a waste discharge device according to any one of claims 1 to 11, wherein the outdoor heat exchanger (30) and the waste discharge device are installed in the machine body (20); The machine body (20) is provided with a main air inlet (21) and a main air outlet (22); the outdoor heat exchanger (30) comprises a heat exchange fan (31) and a heat exchange tube group (32); outdoor air enters the machine body (20) through the main air inlet (21); exhaust gas enters the machine body (20) through the outlet (15) of the exhaust device; after the exhaust gas is mixed with the outdoor air, it is discharged from the machine body (20) through the heat exchange tube group (32), the heat exchange fan (31) and the main air outlet (22) in sequence.

13. The rail transit air conditioning unit according to claim 12, characterized in that: The heat exchange tube group (32) and the machine body (20) form a first receiving portion (23) connected to the main air inlet (21) and a second receiving portion (24) connected to the main air outlet (22); the exhaust device is installed in the first receiving portion (23), and the heat exchange fan (31) is arranged in the second receiving portion (24); The outlet (15) of the waste discharge device is arranged in a direction close to the heat exchange tube group (32); or, the outlet (15) of the waste discharge device is arranged in a direction close to the main air inlet (21).

14. The rail transit air conditioning unit according to claim 13, characterized in that: The vertical distance H between the waste discharge device and the heat exchange tube group (32) satisfies H≥50mm.

15. The rail transit air conditioning unit according to claim 13, characterized in that: The length P of the waste discharge device along the preset height direction and the depth Q of the first receiving portion (23) along the preset height direction satisfy P≤Q / 2.

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