CN201923153U - Reverse suction preventer for high-speed train air-conditioning drainage system - Google Patents

Abstract

The utility model discloses a suction-back prevention device for an air-conditioning drainage system of a high-speed train. The suction-back prevention device is a duckbill valve connected to the end of a drainpipe by means of a throat hoop. The duckbill valve includes a water inlet end and a water discharge end. Both the water inlet end and the water discharge end are cylinders, the diameter of the water inlet end is larger than the diameter of the water discharge end, and there is a side seam at the outlet of the water discharge end; a transitional truncated cone is provided between the water inlet end and the water discharge end. The utility model is similar in appearance to a duckbill, not only has a simple structure, but also can smoothly realize drainage and prevent drainage from being sucked back.

Description

Anti-suckback device for high-speed train air-conditioning drainage system

technical field

The utility model relates to an air-conditioning equipment technology for a rail transit vehicle, in particular to a high-speed train air-conditioning drainage preventing device for sucking back.

Background technique

At present, the drainage system in domestic train air-conditioning devices does not have the function of preventing back-sucking or the function of preventing back-sucking is not good. When the air-conditioning device is running online, it cannot maintain a good seal. The impact of air flow is generated, causing the condensed water in the air conditioner to be sucked back when the indoor cavity is under negative pressure. When sucking back occurs, the water flows back into the air-conditioning unit's interior cavity, forms a splash under the action of the external airflow, and enters the passenger room along the air duct under the action of the centrifugal fan. In order to avoid this situation, people have made some attempts. For example, Chinese Patent Publication No. 201300855Y discloses a device for preventing sucking back. The inner chamber of the drain pan and the water outlet are connected to a resistance pipe, and the resistance pipe is a U-shaped pipe installed on the side plate of the air-conditioning chamber. This technology uses the combined application of the drainage pump and the resistance pipe to ensure that the suction phenomenon will not occur when the indoor cavity of the air conditioner is under negative pressure. However, when the drainage pump fails to work, it will cause water accumulation, and more parts are required, the structure is more complicated, and the cost is high.

Utility model content

The technical problem to be solved by the utility model is to provide a high-speed train air-conditioning drainage system anti-suckback device, which is similar to a duckbill valve in shape, not only simple in structure, but also can smoothly realize drainage and prevent drainage from sucking back.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a high-speed train air-conditioning drainage system anti-suckback device, the key technology of which is: the anti-suckback device is a duck connected to the end of the drain pipe through a throat hoop mouth valve.

The above-mentioned duckbill valve includes a water inlet end and a water discharge end, the shapes of the water inlet end and the water discharge end are both cylinders, the diameter of the water inlet end is larger than the diameter of the water discharge end, and there is a side seam at the outlet of the water discharge end; There is a transitional truncated cone between the end and the drain end.

Preferably, the diameter of the water discharge end is 0.1-0.3 times that of the water inlet end.

Preferably, the above-mentioned duckbill valve is made of EPDM rubber.

The beneficial effects produced by adopting the above technical solution are: the utility model utilizes the elasticity of the rubber material, and when the internal water accumulates (the external pressure is greater than the internal pressure), the duckbill valve is in a closed state to prevent the phenomenon of sucking back; when the internal water accumulates, After reaching a certain pressure (when the internal water pressure is greater than the external pressure), the duckbill valve opens to discharge the water until the external pressure is greater than the internal pressure, and the duckbill valve closes to prevent sucking back. The utility model utilizes its unique shape and the physical properties of the rubber material to realize drainage and prevent back-suction. The utility model not only has a simple structure, but also has low cost, and effectively ensures the reliability of the unit operation.

Description of drawings

Fig. 1 is a perspective view of the utility model;

Fig. 2 is a schematic diagram of drainage of the utility model;

Fig. 3 is a schematic diagram of preventing back suction of the utility model;

Among them, 1. Water inlet end; 2. Conical truncated end; 3. Drainage end; 4. Side seam.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Referring to accompanying drawing 1, accompanying drawing 2 and accompanying drawing 3, this anti-suckback device is a duckbill valve, and described duckbill valve comprises water inlet 1 and discharge end 3, and described water inlet 1 and discharge end 3 are Cylinder, the diameter of the cylinder at the water inlet end 2 is greater than the diameter of the cylinder at the discharge end 3, and a side seam 4 is opened at the outlet of the water discharge end 3; a transition is provided between the water inlet end 1 and the discharge end 3 The frustum of the cone 2. The water inlet 1 of the above-mentioned duckbill valve is connected to the outlet of the drain pipe of the air conditioning unit by means of a metal hose clamp. The cylinder diameter of the water inlet 1 is the same as the diameter of the drain pipe. The duckbill valve can also be connected to the drain pipe with a clamp. The duckbill valve is made of EPDM rubber (ethylene propylene diene monomer), which has excellent resistance to oxidation, ozone and erosion.

The above-mentioned diameter of the water discharge end 3 is 0.1-0.3 times of the diameter of the water inlet end 1, and the use effect is the best in this case.

The utility model is connected with the drain pipe, which can avoid the phenomenon of drainage and suction when the indoor cavity of the air conditioner is under negative pressure, and can discharge the condensed water smoothly to ensure a comfortable environment in the car. The utility model has a simple structure and is easy to install.

Claims (4)

1. a high speed train air-conditioning drainage system prevents the suck-back device, it is characterized in that: the described suck-back device that prevents is for being connected in the duckbill valve of drain hose end by the larynx hoop.

2. high speed train air-conditioning drainage system according to claim 1 prevents the suck-back device, it is characterized in that: described duckbill valve comprises water inlet end (1) and discharge ends (3), described water inlet end (1) is cylinder with the shape of discharge ends (3), the diameter of described water inlet end (1) is greater than the diameter of discharge ends (3), has latasuture (4) in the outlet of discharge ends (3); Be provided with the frustum of a cone (2) of transition between described water inlet end (1) and the discharge ends (3).

3. anti-suck device in the high speed train air-conditioning drainage system according to claim 2 is characterized in that: the diameter of described discharge ends (3) is 0.1～0.3 times of water inlet end (1) diameter.

4. according to claim 1, the 2 or 3 described anti-suck devices that are used for high speed train air-conditioning drainage system, it is characterized in that: described duckbill valve material is an EPDM rubber.

Images