In-car ventilation control system

Abstract

The present invention discloses a vehicle interior ventilation control system, which includes one or more ventilation devices arranged on a vehicle body, wherein the ventilation device includes a ventilation shell, the ventilation shell is in a cylindrical shape, one end of which is provided with a protective net, the protective net is arranged outside the vehicle body, and the other end of the ventilation shell is placed inside the vehicle body. The present invention has the advantages of achieving good natural ventilation inside and outside the parking vehicle body and reducing the temperature inside the vehicle through the heat pressure effect formed by the natural wind pressure outside the vehicle and the height difference of the ventilation device without consuming energy such as electricity.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile accessories, and in particular to an in-vehicle ventilation control system. Background Art

[0002] Under the scorching sun, the temperature inside a car parked in an open-air parking space will rise sharply, which can easily cause heat damage to the items inside the car, cause human discomfort and increase the energy consumption of the car's air conditioning. It may also cause children locked in the car to suffocate due to high temperature, or even cause the car to catch fire. Therefore, there is an urgent need for a safe and simple ventilation device to reduce the temperature inside the car.

[0003] Utility model patent 201420346635.2 designs a porous metal window with anti-theft function, which is helpful to maintain air circulation in the car when parking, but it needs to be loaded and unloaded before and after each use, which is very inconvenient.

[0004] Invention patent 20171127552.7 discloses a high temperature protection device for a parking vehicle and its control method, including a temperature detection module, a child detection module, a main control module, a cooling and ventilation module, etc. The temperature detection module detects the temperature in the vehicle, and the solar cell drives a low-power electric air conditioner to achieve cooling and ventilation in the parking state. However, the device system disclosed in the patent is very complex and costly, especially whether the roof solar panel can drive the air conditioner well, which remains to be studied. The in-vehicle cooling devices disclosed in patents 201620866974.2 and 201610386532.2 are both solar-driven air conditioners or fans, and have similar problems.

[0005] Invention patent 20171372318.2 discloses a vehicle interior cooling system consisting of a bladeless fan and a controller. The temperature in the vehicle is measured by a temperature sensor, and the bladeless fan is processed and controlled by a single-chip microcomputer. Both the bladeless fan and the controller are driven by a vehicle battery. This professional system is very complex, costly, and consumes a lot of battery power.

[0006] Invention patent 201810082448.0 discloses a vehicle ventilation and heat dissipation device including an air inlet duct and an air outlet duct, and mentions that the temperature value is detected by a temperature sensor, and then the exhaust action is determined to achieve cooling in the vehicle. However, the patent does not mention the driving power source, which makes it difficult to apply when parking.

[0007] Invention patent 201721551357.4 discloses a vehicle ventilation and heat dissipation device including an air inlet, an air outlet, etc., which is driven by a fan to achieve ventilation and heat dissipation in the vehicle. Summary of the invention

[0008] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a vehicle ventilation control system, which has the function of achieving better natural ventilation in a parked vehicle and reducing the temperature inside the vehicle through the action of the natural wind pressure outside the vehicle and the thermal pressure formed by the height difference of the ventilation device without consuming energy such as electricity.

[0009] The technical solution of the present invention is: a vehicle ventilation control system, which includes one or more ventilation devices arranged on the vehicle body, the ventilation device includes a ventilation shell, the ventilation shell is cylindrical, one end of which is provided with a protective net, the protective net is arranged on the outside of the vehicle body, and the other end of the ventilation shell is placed on the inside of the vehicle body; the ventilation device achieves better natural ventilation in the parked vehicle and reduces the temperature inside the vehicle through the natural wind pressure outside the vehicle and / or the thermal pressure formed by the relative height difference of the ventilation device.

[0010] A further technical solution of the present invention is: a first shell is sleeved inside the ventilation shell, the first shell is cylindrical and can move axially inside the ventilation shell, an insect-proof net is provided at one end close to the protective net, and a boss is provided on the outer periphery of the other end.

[0011] A further technical solution of the present invention is: a groove is provided at one end of the first shell away from the insect-proof net, a heat-insulating inner door is inserted into the groove, and the heat-insulating inner door separates the two ends of the first shell.

[0012] A further technical solution of the present invention is: the ventilation device is arranged on the vehicle body facing the door, and one end of the ventilation housing provided with a protective net is lower in height than the other end thereof.

[0013] A further technical solution of the present invention is: the ventilation devices are arranged at the front and rear ends on the same side of the vehicle body, and the height difference h between the ventilation devices.

[0014] A further technical solution of the present invention is: the ventilation devices are arranged at the front and rear ends on the opposite sides of the vehicle body, and the height difference h between the ventilation devices.

[0015] A further technical solution of the present invention is: the ventilation device is arranged in the door handle groove, and the size of the protective net of the ventilation shell matches the door handle groove.

[0016] A further technical solution of the present invention is that the protective net is an integrated structure with the outer side of the vehicle body.

[0017] Compared with the prior art, the present invention has the following characteristics:

[0018] 1. The present invention provides a ventilation device on the opposite vehicle body, and forms wind pressure between the air outlets of the ventilation device through natural wind outside the vehicle, prompting air to flow through the air outlets, thereby promoting natural ventilation inside and outside the vehicle.

[0019] 2. The present invention forms natural ventilation inside and outside the vehicle by arranging ventilation devices with a height difference of h on the same-direction and / or opposite-direction vehicle bodies, due to the thermal pressure effect formed by the height difference of the ventilation devices and the temperature difference between inside and outside the vehicle.

[0020] 3. Since the present invention adopts the above design, without consuming energy such as electricity, under the action of the natural wind pressure outside the car and the thermal pressure formed by the height difference of the ventilation device, better natural ventilation is achieved in the parked car, thereby reducing the temperature inside the car.

[0021] The detailed structure of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention;

[0023] Figure 2 for Figure 1 Rear view of

[0024] Figure 3 This is a schematic diagram of the flow of natural wind outside the vehicle and hot air inside the vehicle according to Embodiment 1 of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the ventilation device of the present invention;

[0026] Figure 5 for Figure 4 AA section view;

[0027] Figure 6 for Figure 4 Left view of

[0028] Figure 7 for Figure 4 perspective view. DETAILED DESCRIPTION

[0029] Example 1

[0030] like Figure 1-7 As shown, a ventilation control system in a vehicle includes eight (of course, in order to realize the function of the present invention, the number of ventilation devices is not less than two as long as air convection can be formed) ventilation devices arranged on the vehicle body, each of which includes a ventilation shell 11, which is cylindrical in shape and has a protective net 111 at one end. The protective net 111 is generally made of high-strength steel wire to ensure the safety of the vehicle. The protective net 111 is arranged on the outside of the vehicle body (it can be integrated with the vehicle body shell during production), that is, it matches and is flush with the shape of the outer surface of the vehicle body, which can prevent theft and is beautiful. The other end of the ventilation shell 11 is placed on the inside of the vehicle body, that is, this end matches and is flush with the shape of the inner surface of the vehicle body, which is beautiful and does not occupy space in the vehicle. In this way, the ventilation device connects the air inside and outside the vehicle body.

[0031] Preferably, the ventilation housing 11 is provided with a first housing 12, the first housing 12 is in a cylindrical shape, and its length is shorter than that of the ventilation housing 11. The first housing 12 is in a cylindrical shape and matches the shape of the ventilation housing 11, that is, the outer wall of the first housing 12 matches the inner wall of the ventilation housing 11, and the first housing 12 can move axially in the ventilation housing 11. An insect-proof net 121 is provided at one end thereof close to the protective net 111, so as to prevent mosquitoes from entering the vehicle through the protective net 111. When mosquitoes and other garbage are stuck on the insect-proof net 121, the first housing 12 can be pulled out toward the vehicle, the mosquitoes and other garbage on the insect-proof net 121 can be cleaned, and then the vehicle can be installed for continued use. A boss 122 is provided at the outer periphery of the other end of the first housing 12, and the size of the outer periphery of the boss 122 is not less than the size of the outer periphery of the ventilation housing 11, so that the position of the first housing 12 inserted into the ventilation housing 11 can be limited, and the first housing 12 can be pulled out to remove mosquitoes and other garbage from the insect-proof net 121.

[0032] In order to prevent unnecessary air exchange between the inside and outside of the vehicle body, a groove 123 is provided at one end of the first housing 12 away from the anti-insect net 121 (in this embodiment, the groove 123 is provided at the boss 122), and an insulation inner door 5 is inserted into the groove 123 (of course, the insulation inner door 5 can also be inserted into the grooves provided in the ventilation housing 11 and the first housing 12), and the two ends of the first housing 12 are separated by the insertion of the insulation inner door 5. The insulation inner door 5 is driven electrically or hydraulically and is controlled by a control switch placed in the front control panel of the vehicle, so that the opening and closing of the insulation inner door 5 can be quickly controlled. When there is no need for air exchange between the inside and outside of the vehicle body, the insulation inner door can be closed to ensure that unnecessary air heat and mass exchange between the inside and outside of the vehicle body is not caused by the ventilation device.

[0033] In order to prevent rainwater from entering the vehicle through the ventilation device, the ventilation shell 11 is provided with a protective net 111 at one end which is lower than the other end, that is, the end of the protective net 111 located outside the vehicle body is lower than the end of the boss 122 located inside the vehicle body (not shown in the figure).

[0034] In order not to affect the appearance of the vehicle, four ventilation devices are respectively arranged in four door handle grooves, and the size of the protective net 111 of the ventilation housing 11 matches the door handle groove. Figure 1 As shown, the first ventilation device 2 is provided in the two handle grooves on the left side. Figure 2 As shown, the second ventilation device 4 is provided in the two right handle grooves. This arrangement can utilize the wind pressure of the natural wind outside the vehicle to achieve natural ventilation inside and outside the vehicle. The natural wind outside the vehicle forms wind pressure between the vents of the ventilation device (i.e., the protective net 111 of this embodiment, the same below), which can promote air to flow through the ventilation device, thereby promoting natural ventilation inside the vehicle. Figure 3As shown, assuming that the air flow rate at the first ventilation device 2 is v, and the air flow rate at the second ventilation device 4 is 0, according to the principle of fluid dynamics, the pressure difference between the first ventilation device 2 and the second ventilation device 4 is:

[0035] (1)

[0036] (1) In the formula, ρ is the air density, which can be regarded as a constant. Therefore, the natural wind outside the vehicle body can cause a large pressure difference between the two ventilation devices, thus forming Figure 3 The BB direction ventilation is shown. In outdoor parking lots, high-speed wind is common, which can better create a pressure difference between the ventilation devices, thereby promoting natural ventilation in the car.

[0037] The other four ventilation devices are arranged as follows: a third ventilation device 1 is provided under each of the two front doors, a fourth ventilation device 3 is provided on each of the two rear pillars of the vehicle, and there is a height difference h between the third ventilation device 1 and the fourth ventilation device 3. The height difference (i.e., height difference) of the ventilation openings of the ventilation devices (i.e., the protective net 111 of this embodiment, the same below) and the temperature difference between the inside and outside of the vehicle form a thermal pressure effect. According to the principles of fluid mechanics, the air flow through the ventilation openings of the ventilation devices is proportional to the ventilation opening area of ​​the ventilation devices, and is proportional to the square of the height difference between the ventilation openings of the ventilation devices. Figure 3 As shown, assuming that the wind speed at the vents of the fourth ventilation device 3 is 0, then according to the principle of fluid dynamics, the pressure difference outside the vents of the third ventilation device 1 and the vents of the fourth ventilation device 3 is:

[0038] (2)

[0039] (2) In the formula, g is the acceleration of gravity, and h is the height difference between the vents of the third ventilation device 1 and the vents of the fourth ventilation device 3. Under parking conditions, the air temperature inside the vehicle is higher than the air temperature outside the vehicle. Therefore, the air density inside the vehicle is ρ n Denser than the air outside the vehicle ρ w Since the height difference h between the vents of the third ventilation device 1 and the vents of the fourth ventilation device 3 is greater than zero, Figure 3 Therefore, in the summer outdoor parking conditions, the method designed by this patent is easy to form natural ventilation inside and outside the car due to heat pressure.

[0040] like Figure 1As shown, since there is a height difference h2 between the vents of the third ventilation device 1 and the vents of the first ventilation device 2, and there is a height difference h1 between the vents of the first ventilation device 2 and the vents of the fourth ventilation device 3, the thermal pressure effect caused by the temperature difference inside and outside the vehicle body will also be generated, thereby achieving natural ventilation inside and outside the vehicle body.

[0041] The simple circuit involved in this embodiment is composed of a switch, a line and an electric or hydraulic controller for driving the heat-insulating inner door 5, and is connected to the vehicle power supply, which is a prior art and will not be described in detail.

[0042] Under the combined effects of solar radiation, outdoor high temperature and the heat storage performance of the vehicle itself, the surface temperature of a car exposed to the sun in an open-air parking space in summer can be as high as about 80°C, and the temperature inside the car can be as high as about 60°C, while the highest temperature of the air outside the car is only about 40°C. When parking, if the car body needs ventilation and cooling, the heat-insulating inner door 5 can be opened to connect the inside and outside of the car body. Through the present invention, it is possible to achieve good natural ventilation inside and outside the parking car body and reduce the temperature inside the car under the thermal pressure effect formed by the natural wind pressure outside the car and the height difference of the ventilating device without consuming energy such as electricity.

[0043] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention may also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A vehicle ventilation control system, characterized in that: The invention comprises one or more ventilation devices arranged on a vehicle body, wherein the ventilation device comprises a ventilation shell (11), the ventilation shell (11) is in a cylindrical shape, one end of which is provided with a protective net (111), the protective net (111) is arranged on the outside of the vehicle body, and the other end of the ventilation shell (11) is arranged on the inside of the vehicle body; the ventilation device realizes better natural ventilation in the parked vehicle and reduces the temperature inside the vehicle through the natural wind pressure outside the vehicle and / or the thermal pressure formed by the relative height difference of the ventilation device; The ventilation housing (11) is provided with a first housing (12) in a cylindrical shape and can move axially in the ventilation housing (11). An insect-proof net (121) is provided at one end thereof close to the protective net (111), and a boss (122) is provided on the outer periphery of the other end thereof. A groove (123) is provided at one end of the first shell (12) away from the insect-proof net (121), a heat-insulating inner door (5) is inserted into the groove (123), and the heat-insulating inner door (5) separates the two ends of the first shell (12); Four ventilation devices are respectively arranged in the four door handle grooves, including: a first ventilation device is arranged in the two left handle grooves, and a second ventilation device is arranged in the two right handle grooves; If the air velocity at the first ventilation device is v and the air velocity at the second ventilation device is 0, according to the principles of fluid dynamics, the pressure difference between the first ventilation device and the second ventilation device is: (1)In the formula, ρ is the air density; A third ventilation device is provided under each of the two front doors, and a fourth ventilation device is provided on each of the two rear pillars. There is a height difference h between the third ventilation device and the fourth ventilation device. Assuming that the wind speed at the vents of the fourth ventilation device is 0, according to the principles of fluid dynamics, the pressure difference outside the vents of the third ventilation device and the vents of the fourth ventilation device is: AP 1,3 =gh(ρ w -ρ n ) (2) (2) where g is the gravitational acceleration, h is the height difference between the ventilating opening of the third ventilation device and the ventilating opening of the fourth ventilation device; ρ n is the air density inside the car, ρ w is the density of air outside the vehicle.

2. The vehicle interior ventilation control system according to claim 1, characterized in that: The ventilation device is arranged on the vehicle body facing the vehicle door, and the ventilation housing (11) is provided with a protective net (111) at one end thereof, the height of which is lower than the other end thereof.

3. The vehicle interior ventilation control system according to claim 1, characterized in that: The protective net (111) is an integrated structure with the outer side of the vehicle body.

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