CN109249776B - Natural ventilation system and double-deck passenger car - Google Patents

Abstract

The invention provides a natural ventilation system and a double-decker passenger car, and relates to the technical field of ventilation. The natural ventilation system comprises: an air inlet box (1), an air guide box (2), an air collecting box (3) and an air guide duct (4), wherein the air inlet box (1) is provided with an air inlet (1a) for receiving external air, and the air guide box (2) is communicated with the air inlet box (1) and the air collecting box (3) respectively , the outside air enters the air collecting box (3) through the air guiding box (2); the air outlet end of the air collecting box (3) is provided with a plurality of outlets (3a), each outlet (3a) is An air guide duct (4) is provided, and the outside air enters the air collecting box (3) and is distributed to a plurality of the air guide ducts (4) through the outlet (3a), and then passes through the air guide duct (4). ) export. The present invention also provides a double-decker passenger car, comprising the aforementioned natural ventilation system. The invention can increase the air intake volume of the double-decker passenger car, improve the air volume flow in the ventilation system, and reduce the energy loss.

Description

A kind of natural ventilation system and double-decker passenger car

technical field

The invention relates to the technical field of ventilation, in particular to a natural ventilation system and a double-decker passenger car.

Background technique

The comfort level of the passenger car interior environment is related to the travel quality of passengers. In terms of comfort, in addition to the influence factors such as vehicle vibration, lighting, summer cooling in the passenger compartment and heating in winter, the breeze speed in the passenger compartment, the uniformity of the wind speed field, and the indoor Airflow organization state, pressure changes inside and outside the car are also important parameters, and these parameters mainly depend on the ventilation of the passenger car.

For double-decker buses, due to space constraints, there are more stringent requirements for the air intake of the ventilation system. The current natural ventilation system simply opens two air outlets on the left and right, each of which accounts for 50% of the air volume, but the total air volume is low (only 2kg/s), which is different from the design requirement at a speed of 40km/h. There is still a certain gap in the required ventilation volume of 3kg/s. The air flow in the ventilation system is poor in fluidity, so it cannot carry out effective and sufficient air purification, and the energy loss is relatively large.

SUMMARY OF THE INVENTION

The invention provides a natural ventilation system, which aims to improve the problems of low air intake, poor air flow in the ventilation system, inability to perform effective and sufficient air purification, and large energy loss in the traditional ventilation system.

The present invention is realized in this way:

A natural ventilation system is used for natural ventilation of double-decker passenger cars, comprising: an air intake box, an air guide box, an air collection box and an air guide duct, wherein the air intake box is provided with an air inlet for receiving external air The air guide box is communicated with the air inlet box and the air collection box respectively, and the outside air enters the air collection box through the air guide box; the air outlet end of the air collection box is provided with a plurality of outlets Each of the outlets is provided with an air guide duct, and the outside air is distributed to a plurality of the air guide ducts through the outlet after entering the air collecting box, and then led out through the air guide duct.

Further, the air guide ducts are rectangular air ducts, which are distributed in the air collecting box, and are used to guide the airflow flowing out of the air collecting box to flow to the air-conditioning duct.

Further, the air collecting box is provided with three outlets, and the three outlets are respectively provided with a left air guide duct, a middle air guide duct and a right air guide duct.

Further, the left air outlet, the middle air outlet and the right air outlet are respectively provided with the left air outlet, the middle air outlet and the right air outlet, and the left air outlet, the middle air outlet and the right air outlet are respectively connected with the air conditioner. Pipe connection.

Further, the ventilation ratio of the left air guide duct, the middle air guide duct and the right air guide duct is 1:1.5-2.5:1.

Further, an air inlet grille is provided at the air inlet of the air inlet box to remove dust in the air.

Further, an air purifying device is also arranged on the channel between the air collecting box and the air guiding box for purifying the air flowing through the natural ventilation system.

Further, the air purification device is a filter screen, the air collecting box is provided with an installation groove, and the filter screen is embedded in the installation groove.

A double-decker passenger car, comprising the natural ventilation system described in any one of the foregoing.

The beneficial effects of the present invention are as follows: the natural ventilation system obtained by the present invention through the above-mentioned design can increase the effective area of the air inlet and increase the air intake volume when in use; it is constantly exchanged with the fresh air outside the car, and the air collecting box can prevent the air entering the car from entering the car. It can distribute the fresh air volume of the room, improve the air flow in the ventilation system, reduce energy loss, and adjust the cleanliness, temperature and humidity of the air in the cabin, thus directly affecting human health and comfort.

Description of drawings

In order to explain the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic structural diagram of a natural ventilation system provided in Embodiment 1 of the present invention;

Fig. 2 is the partial structure schematic diagram of the air collecting box in Fig. 1;

Fig. 3 is the structural representation of the middle air outlet of the natural ventilation system;

Fig. 4 is the structural schematic diagram of the left air outlet of the natural ventilation system;

Icons: 1. Air inlet box, 1a. Air inlet, 1b. Air inlet grille, 2. Air guide box, 3. Air collection box, 3a. Outlet, 3b. Air purification device, 4. Air guide duct, 4a. Left air duct, 4b. Middle air duct, 4c. Right air duct, 4d. Left air outlet, 4e. Middle air outlet, 4f. Right air outlet.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " rear, left, right, vertical, horizontal, top, bottom, inside, outside, clockwise, counterclockwise, etc., or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, Therefore, it should not be construed as a limitation of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

In the present invention, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of the two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

Embodiment 1, as shown in FIG. 1 , the present invention provides a natural ventilation system for the natural ventilation of double-deck passenger cars, including: an air inlet box 1 , an air guide box 2 , an air collection box 3 and an air guide duct 4 . The air inlet box 1 is provided with an air inlet 1a for receiving external air; the air guide box 2 is communicated with the air inlet box 1 and the air collecting box 3 respectively, and the outside air passes through the air guide box The box 2 enters the air collecting box 3; the air outlet end of the air collecting box 3 is provided with a plurality of outlets 3a, each outlet 3a is equipped with an air guide 4, and the outside air enters the air collecting The box 3 is then distributed to a plurality of the air guide ducts 4 through the outlet 3a, and then led out through the air guide duct 4. Such a split structure design is convenient for replacement and cleaning.

Optionally, as shown in FIG. 1 , the air guide duct 4 is a rectangular air duct, and can also be a cylindrical, spiral and other shaped air duct, and is distributed on the air outlet one of the air collecting box 3 . The side is used to guide the air flow out of the air collecting box 3 to flow to the air conditioning duct.

Optionally, as shown in FIG. 1 , the air collecting box 3 is provided with three outlets 3a, and the three outlets 3a are respectively provided with a left air guide duct 4a, a middle air guide duct 4b and a right air guide duct. 4c, the design of multiple air guides is beneficial to reduce the conveying resistance of airflow, increase the air intake, and meet the air volume demand of double-decker passenger cars.

Preferably, the total cross-sectional area of the three outlets 3a is 80%-90% of the surface area of the plane where the three outlets 3a are located. Under this arrangement, the air-guiding efficiency of the air-collecting box 3 is high, and the air volume of the air-conducting box 2 can be quickly distributed to different air-guiding ducts 4 .

Preferably, the volume of the air collecting box 3 is 0.1-0.2 times the volume of the air guiding box 2, which is convenient to increase the air collecting effect and reasonably distribute the air volume of the outlet 3a.

Optionally, as shown in FIG. 1 , the left air guide duct 4a, the middle air guide duct 4b and the right air guide duct 4c are respectively provided with a left air outlet 4d, a middle air outlet 4e and a right air outlet 4f. The air outlet 4d, the middle air outlet 4e and the right air outlet 4f are respectively connected to the air-conditioning duct.

Optionally, as shown in FIG. 1 , the ventilation ratio of the left air guide duct 4a, the middle air guide duct 4b, and the right air guide duct 4c is 1:1.5-2.5:1, preferably, as shown in FIG. 3 The ventilation ratio of the left air guide duct 4a, the middle air guide duct 4b, and the right air guide duct 4c is 1:2:1, which meets the design requirements of the passenger car, and makes the air volume inside the passenger car more comfortable.

Optionally, as shown in FIG. 1, the air collecting box 3 is arranged at the center of the top surface of the air guiding box 2, the left air guiding channel 4a extends leftward to the left end of the air guiding box 2, and the right air guiding channel 4c extends rightward. To the right end of the air guide box 2, correspondingly, the left air outlet 4d is located at the left end of the air guide box 2, the right air outlet 4f is located at the right end of the air guide box 2, and the middle air outlet 4e is located in the middle of the air guide box 2. Reasonable distribution of air vents is conducive to accelerating air flow. Optionally, the left air outlet 4d and the right air outlet 4f are at the same height and higher than the height of the middle air outlet 4e.

For the natural ventilation system provided in the present embodiment 1 and the prior art (air guide ducts are respectively provided at both ends of the air guide box, and the air volume of the air guide ducts at both ends accounts for 50%), the air volume is adjusted at a wind speed of 40km/h. The results are shown in Table 1. The natural ventilation system provided by the embodiment of the present invention has a total air volume greater than 3 kg/s at a wind speed of 40 km/h, which meets the design requirements, as shown in Table 1 below. Compared with the ventilation rate of 2.281kg/s in the prior art, the ventilation rate of this embodiment is increased by 42.7%.

Table 1

Optionally, as shown in FIG. 1 , an air inlet grill 1b is provided at the air inlet 1a of the air inlet box 1 to remove particulate matter such as dust and sand in the air.

Optionally, as shown in FIG. 2 , an air purifying device 3b is further provided on the passage between the air collecting box 3 and the air guiding box 2 for purifying the air flowing through the natural ventilation system.

Optionally, as shown in FIG. 2 , the air purification device 3b is a filter screen, the air collecting box 3 is provided with an installation groove, the filter screen is embedded in the installation groove, and the filter screen can be removed. under regular cleaning. Optionally, as shown in FIG. 1 , when the natural ventilation system is working, the outside air passes through the filtering effect of the air inlet grille, enters the air inlet box 1 through the air inlet 1a, then flows through the air guide box 2, and passes through the air inlet box 1. After the purification device is fully purified, it flows into the air collecting box 3 , and the air collecting box 3 distributes the air volume in the box reasonably, and then flows out through the air duct 4 .

The present invention also provides a natural ventilation system, a double-decker passenger car, the ventilation system of which is the natural ventilation system described in any of the above embodiments. The environment has been enhanced to enhance passenger comfort.

Example 2

Referring to FIGS. 3 and 4 , the realization principle and the technical effect of the natural ventilation system provided by the embodiment of the present invention are the same as those in Embodiment 1. For a brief description, for the parts not mentioned in this embodiment, reference may be made to the embodiment. 1 corresponding content.

Optionally, as shown in FIGS. 3 and 4 , the left air outlet 4d, the middle air outlet 4e and the right air outlet 4f are designed as gradually expanding pipes, the right air outlet 4f is the same as the left air outlet 4d, and the gradually expanding pipe is the same as the left air outlet 4d. The cross-sectional area of the pipe gradually increases with the direction of the airflow. In order to reduce the pressure loss caused by the sudden increase of the pipe cross-sectional area at the joint between the air outlet and the air conditioning pipe, avoid the generation of eddy currents, so that the air flow can smoothly enter the cabin.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. a natural ventilation system, for the natural ventilation of double-decker passenger car, is characterized in that, comprises: An air inlet box (1), an air guide box (2), an air collection box (3) and an air guide channel (4), wherein the air inlet box (1) is provided with an air inlet (1a) for receiving external Air; the air guide box (2) is communicated with the air inlet box (1) and the air collecting box (3) respectively, and the external air enters the air collecting box (3) through the air guide box (2) ); the volume of the air collection box (3) is 0.1-0.2 times the volume of the air guide box (2), and the air outlet end of the air collection box (3) is provided with three outlets (3a), three outlets (3a) The total cross-sectional area is 80%-90% of the surface area of the plane where the three outlets (3a) are located, and the three outlets (3a) are respectively provided with a left air guide with a ventilation ratio of 1:1.5-2.5:1 (4a), the middle air guide (4b) and the right air guide (4c), the outside air is distributed to a plurality of the air guides through the outlet (3a) after entering the air collecting box (3) (4), and then lead out through the air guide channel (4). 2. The natural ventilation system according to claim 1, characterized in that, the air guide duct (4) is a rectangular air duct, which is distributed in the air collecting box (3), and is used to guide the air from the air collecting box (3). The air flow out of the box (3) flows to the air conditioning duct. 3. The natural ventilation system according to claim 1, wherein the left air outlet (4d) is respectively provided with the left air guide duct (4a), the middle air guide duct (4b) and the right air guide duct (4c) , the middle air outlet (4e) and the right air outlet (4f), the left air outlet (4d), the middle air outlet (4e) and the right air outlet (4f) are respectively connected with the air conditioning pipeline. 4. The natural ventilation system according to claim 1, characterized in that, an air inlet grill (1b) is provided at the air inlet (1a) of the air inlet box (1) to remove dust in the air. 5. The natural ventilation system according to claim 1, characterized in that, an air purifying device (3b) is also provided on the passage between the air collecting box (3) and the air guiding box (2), for purifying the flow through The air of the natural ventilation system. 6. The natural ventilation system according to claim 5, characterized in that, the air purification device (3b) is a filter screen, the air collecting box (3) is provided with a mounting slot, and the filter screen is embedded in the installed in the slot. 7. A double-decker passenger vehicle, characterized in that it comprises the natural ventilation system of any one of the preceding claims 1-6.

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