Vehicle-mounted air exchange device

Abstract

The utility model belongs to the technical field of logistics transportation equipment, and particularly relates to a vehicle-mounted air exchange device. Comprising a fan, a quick disassembly and assembly mechanism and an isolation hood, an air inlet is formed in one side of the fan, and an air outlet is formed in the other side of the fan The quick disassembly and assembly mechanism is detachably connected to one side of the exhaust port; the inner wall of the compartment is provided with a ventilation window communicating the interior and exterior of the compartment; the quick dismounting and mounting mechanism is fixedly mounted on the inner wall of the carriage on the two opposite side edges of the ventilation window; the isolation hood is fixedly installed at the position, close to the outer side of the compartment, of the ventilation window and used for exhausting air and reducing air exchange inside and outside the compartment. The utility model aims to solve the problems that a fan is inconvenient to mount and easy to fall off and cold air in a compartment is easy to lose during ventilation in the compartment.

Description

Technical Field

[0001] The utility model belongs to the technical field of logistics transportation equipment, and particularly relates to a vehicle-mounted air exchange device. Background Art

[0002] As an important form of logistics transportation vehicles, the carriage of a refrigerated truck is mainly used to carry perishable foods; by controlling the environmental temperature inside the carriage, the temperature and humidity inside the carriage can be kept constant during transportation, which is beneficial to the preservation and anti-corrosion of foods. Since fresh foods are often stored in a refrigerated truck, the inside of the carriage needs to be ventilated frequently to prevent peculiar smell or excessive humidity inside the carriage; therefore, a ventilation fan needs to be placed inside the carriage for rapid ventilation.

[0003] At present, usually a fan is hung or placed inside the carriage of a refrigerated truck for ventilation; since this method is to fix and hang the fan on the inner wall of the carriage or place it inside the carriage; and the fan is not convenient to disassemble and install by using the fixed hanging method; by using the method of placing it inside the carriage, during transportation, the fan will shake, especially when driving on a rough road, the fan is very easy to fall or topple and be damaged; in addition, during the ventilation process, when the fan is turned on, the carriage door needs to be opened, which will bring in outside air to form a cold and heat exchange with the air inside the carriage, resulting in the loss of cold air inside the carriage and the foods being prone to deterioration.

[0004] Therefore, there is an urgent need for a ventilation device for a carriage, which can be firmly installed on the carriage, and can be conveniently disassembled and installed according to actual needs; and can effectively discharge the air inside the carriage unidirectionally to the outside without opening the carriage door; and can prevent the air exchange between the inside and outside of the carriage through an isolation device when the fan is not started; so as to solve the problems that the fan is inconvenient to install, easy to fall off and the cold air inside the carriage is easy to lose during the ventilation of the carriage. Summary of the Utility Model

[0005] The utility model provides a vehicle-mounted air exchange device, which includes a fan, a quick disassembly and assembly mechanism and an isolation cover; when ventilation is required in the carriage, the fan can be quickly and firmly installed in place, and when ventilation is not required, the fan can be quickly removed and the cold air inside the carriage can be ensured not to be lost; so as to solve the problems that the fan is inconvenient to install, easy to fall off and the cold air inside the carriage is easy to lose during the ventilation of the carriage. The specific content of the utility model is as follows:

[0006] A vehicle-mounted air exchange device is applied to the carriage of a refrigerated truck and includes a fan, a quick disassembly and assembly mechanism and an isolation cover;

[0007] One side of the fan has an air inlet, and the other side has an air outlet; the quick disassembly and assembly mechanism is detachably connected to the side of the air outlet;

[0008] The inner wall of the carriage is provided with ventilation windows communicating the inside and outside of the carriage; the quick disassembly and assembly mechanism is fixedly installed on the inner wall of the carriage at the opposite side edges of the ventilation windows;

[0009] The isolation cover is fixedly installed at a position close to the outside of the carriage of the ventilation window for exhausting air and reducing the air exchange between the inside and outside of the carriage.

[0010] Further, one side of the exhaust port is fixedly connected with a mounting plate; connecting plates are respectively fixedly installed at the opposite side edges of the mounting plate; clamping grooves are formed on the opposite sides of the two connecting plates.

[0011] Further, the quick disassembly and assembly mechanism includes a positioning groove, a stop block groove and a stop block;

[0012] The positioning groove is formed on the inner wall of the carriage at the opposite side edges of the ventilation window, and has the same size as the connecting plate and is in plug-in fit with the connecting plate;

[0013] The stop block groove is formed on the side of the positioning groove away from the ventilation window, and is perpendicular and communicated with the positioning groove;

[0014] The stop block is installed in the stop block groove; the length and width of the stop block are equal to those of the clamping groove; when the connecting plate is in plug-in fit with the positioning groove, the stop block is aligned with the clamping groove and can slide between the stop block groove and the clamping groove.

[0015] Further, a long hole perpendicular to the positioning groove is formed on the side of the stop block groove close to the inside of the carriage; a control pin is fixedly connected to the side of the stop block close to the long hole; the control pin passes through the long hole from the inside of the positioning groove to the outside.

[0016] Further, an elastic member is installed between the stop block groove and the stop block; the elastic member presses the stop block towards the direction of the clamping groove.

[0017] Further, pin shafts are fixedly installed at the four vertices of the ventilation window; a spring and a positioning plate are sequentially sleeved on the pin shafts; one end of the spring is fixed on the inner wall of the carriage, and the other end is fixed on the positioning plate;

[0018] The positioning plate can rotate around the pin shaft, and a positioning pin is arranged at one end away from the pin shaft and close to the ventilation window;

[0019] Positioning pin holes are formed at the four vertices of the mounting plate close to the fan side, and the positioning pin holes have the same diameter as the positioning pins and can be mutually matched.

[0020] Further, the isolation cover is of a louver structure, including a window frame and a number of louver blades; the window frame is installed at a position close to the outside of the carriage on the ventilation window; a number of the louver blades are all horizontally and rotatably installed on both vertical sides of the window frame.

[0021] Further, connecting shafts are provided at both ends of a number of the louver blades; corresponding positions on the window frame where the two ends of a number of the louver blades are connected are provided with connecting shaft holes, which are matched with the connecting shafts; a torsional elastic member is installed between each connecting shaft hole and the connecting shaft; one end of the torsional elastic member is fixed on the inner wall of the connecting shaft hole, and the other end is fixed on the connecting shaft.

[0022] The beneficial effects of the present utility model are that by providing a ventilation window on the inner wall of the carriage and installing a fan on the ventilation window, the air inside the carriage can be directly discharged to the outside without having to open the carriage door for ventilation; a quick disassembly and assembly mechanism is provided on one side of the fan, which can achieve the quick installation and disassembly of the fan, and is firmly fixed and not easy to fall off; and an isolation cover is provided on the ventilation window, which can achieve the one-way discharge of the air inside the carriage during ventilation and effectively reduce the air exchange between the inside and outside of the carriage, and can seal the ventilation window when not ventilating, so as to isolate the air inside and outside the carriage. Description of the Drawings

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those skilled in the art, without creative efforts, other embodiments can also be obtained based on these drawings.

[0024] Figure 1 It is a schematic diagram of the external structure of the carriage of the vehicle-mounted air exchange device;

[0025] Figure 2 is Figure 1 It is a schematic diagram of the overall structure of the vehicle-mounted air exchange device;

[0026] Figure 3 It is a schematic diagram of the partial structure of the vehicle-mounted air exchange device;

[0027] Figure 4 It is an enlarged schematic diagram of the partial structure of the quick disassembly and assembly mechanism of the vehicle-mounted air exchange device;

[0028] Figure 5 It is a schematic diagram of the isolation cover structure of the vehicle-mounted air exchange device;

[0029] Figure 6 It is an enlarged schematic diagram of the partial structure of the isolation cover of the vehicle-mounted air exchange device;

[0030] In the figure: 1. carriage; 2. fan; 201. air inlet; 202. mounting plate; 203. connecting plate; 3. quick disassembly and assembly mechanism; 301. positioning groove; 302. stopper groove; 303. stopper; 304. long hole; 305. operating pin; 306. elastic member; 307. pin shaft; 308. spring; 309. positioning plate; 310. positioning pin; 4. isolation cover; 401. window frame; 402. shutter blade; 403. connecting shaft; 404. connecting shaft hole; 405. torsional elastic member. Specific embodiments

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. 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.

[0032] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0033] It should be noted that when an element is referred to as being "fixed to", "placed with", "provided with", "equipped with", "set on" or "connected to" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0034] It should be noted that unless otherwise clearly defined and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside 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.

[0035] An on-vehicle air exchange device provided by the present invention is applied to the carriage of a refrigerated truck. Please refer toFigures 1 to 6 , including a fan 2, a quick disassembly and assembly mechanism 3, and an isolation cover 4;

[0036] One side of the fan 2 has an air inlet 201, and the other side has an air outlet; the quick disassembly and assembly mechanism 3 is detachably connected to the side of the air outlet;

[0037] An air exchange window communicating inside and outside the carriage 11 is opened on the inner wall of the carriage 11; the quick disassembly and assembly mechanism 3 is fixedly installed on the inner wall of the carriage 1 at the opposite two side edges of the air exchange window;

[0038] As Figure 1 shown, the isolation cover 4 is fixedly installed at a position close to the outside of the carriage 1 of the air exchange window, for exhausting air and reducing the air exchange between the inside and outside of the carriage 1.

[0039] It should be noted that the technical solution provided by the present invention can be applied not only to the carriage 1 of a refrigerated truck, but also to other closed boxes for ventilation.

[0040] It should be noted that the fan 2 proposed in this solution adopts the structure of the fan 2 in the prior art. The fan 2 itself has an air inlet 201 and an air outlet. During operation, the fan 2 sucks air from the air inlet 201 and discharges it from the air outlet, thereby realizing the function of ventilating the spaces on both sides of the fan 2.

[0041] It should be noted that the air exchange window is opened on the inner wall of the carriage 1. Preferably, the carriage 1 wall is cut into a rectangular window of the required size by cutting.

[0042] In specific implementation, by opening an air exchange window on the inner wall of the carriage 1 and installing a fan 2 at the air exchange window, the air inside the carriage 1 can be directly discharged to the outside without having to open the carriage 1 door for ventilation; by providing a quick disassembly and assembly mechanism 3 on one side of the fan 2, the quick installation and disassembly of the fan 2 can be realized, and it is fixed firmly and not easy to fall off; by providing an isolation cover 4 at the air exchange window, the air inside the carriage 1 can be discharged unidirectionally during ventilation, effectively reducing the air exchange between the inside and outside of the carriage 1, and the ventilation window can be sealed when not ventilating to isolate the air inside and outside the carriage 1.

[0043] According to the embodiment provided by the present invention, as Figure 2 shown, a mounting plate 202 is fixedly connected to the side of the air outlet; connecting plates 203 are respectively fixedly installed on the opposite two side edges of the mounting plate 202; card slots (not shown in the figure) are opened on the opposite sides of the two connecting plates 203.

[0044] It should be noted that the mounting plate 202 is a rectangular component with a through hole in the middle having the same diameter as the exhaust port, and is preferably fixed on one side of the exhaust port of the fan 2 by screws; the mounting plate 202 is preferably made of aluminum alloy; the connecting plate 203 is a strip-shaped part with a rectangular cross-section, preferably made of aluminum alloy, and is preferably fixed at the corresponding position of the mounting plate 202 by screws or rivets.

[0045] It should be noted that the two card slots are opened on the opposite sides of the two connecting plates 203. For example, if the two connecting plates 203 are fixed at the upper and lower ends of the mounting plate 202, the card slots are respectively opened on the upper end surface of the upper connecting plate 203 and the lower end surface of the lower connecting plate 203.

[0046] In specific implementation, the mounting plate 202 provides a basis for the installation and fixation of the fan 2; the connecting plate 203 serves as a connecting bridge between the fan 2 and the quick disassembly and assembly mechanism 3; the card slot cooperates with the stopper 303 described later, enabling the fan 2 to be reliably fixed at the position of the ventilation window.

[0047] In one embodiment, as Figure 3 shown, the quick disassembly and assembly mechanism 3 includes a positioning slot 301, a stopper slot 302, and a stopper 303;

[0048] The positioning slot 301 is opened on the inner wall of the carriage 1 at the opposite side edges of the ventilation window, and its size is the same as that of the connecting plate 203, and is in plug-in fit with the connecting plate 203;

[0049] The stopper slot 302 is opened on the side of the positioning slot 301 away from the ventilation window, and is perpendicular and communicated with the positioning slot 301;

[0050] The stopper 303 is installed in the stopper slot 302; the length and width dimensions of the stopper 303 are equal to those of the card slot; when the connecting plate 203 is in plug-in fit with the positioning slot 301, the stopper 303 is aligned with the card slot and can slide between the stopper slot 302 and the card slot.

[0051] It should be noted that the positioning slot 301 is preferably formed by cutting a groove-shaped notch on the inner wall of the carriage 1 at the opposite side edges of the ventilation window; the position of the positioning slot 301 can be opened on the left and right sides or the upper and lower sides of the ventilation window, and the orientation of the connecting plate 203 during the installation of the fan 2 needs to be consistent with that of the positioning slot 301.

[0052] It should be noted that the stopper slot 302 is opened on the side of the positioning slot 301 away from the ventilation window. For example, if the positioning slot 301 is opened on the upper and lower sides of the ventilation window, the stopper slot 302 is opened at the upper end of the upper positioning slot 301 and the lower end of the lower positioning slot 301.

[0053] It should be noted that the stop block groove 302 is formed by grooving at the corresponding position of the carriage 1 and blocking the processing opening with a baffle; the baffle is preferably fixed by screws for easy installation and replacement of the stop block 303.

[0054] It should be noted that the stop block 303 is installed in the stop block groove 302. After the connecting plate 203 is inserted and matched with the positioning groove 301, the card slot of the connecting plate 203 coincides with the moving position of the stop block 303. In this way, the stop block 303 can move between the stop block groove 302 and the card slot. For example, the positioning groove 301 is located at the upper end position of the ventilation window; the connecting plate 203 at the upper end of the fan 2 is inserted into the positioning groove 301, then the opening of the card slot faces upward and coincides with the lower end face of the stop block 303. In this way, the stop block 303 can move downward, its lower end extends into the card slot, and its upper end still remains in the stop block groove 302. In this way, the connecting plate 203 can be fixed in the positioning groove 301.

[0055] In specific implementation, the positioning groove 301 provides an installation space for the connecting plate 203; the stop block groove 302 provides an installation space for the stop block 303; the stop block 303 can fix the fan 2 on the ventilation window by cooperating with the card slot; the positioning groove 301, the stop block groove 302 and the stop block 303 provide conditions for fixing the fan 2.

[0056] According to the embodiment provided by the present invention, as Figure 4 shown, a long hole 304 perpendicular to the positioning groove 301 is opened on one side of the stop block groove 302 close to the inside of the carriage 1; a control pin 305 is fixedly connected to one side of the stop block 303 close to the long hole 304; the control pin 305 passes out of the long hole 304 from the inside of the positioning groove 301.

[0057] It should be noted that the length of the long hole 304 is consistent with the moving distance of the stop block 303; the control pin 305 is preferably fixed to the stop block 303 by welding or threading.

[0058] In specific implementation, the control pin 305 can be manipulated by hand to control the movement of the stop block 303 between the stop block groove 302 and the card slot when installing or disassembling the fan 2.

[0059] In one embodiment, as Figure 4 shown, an elastic member 306 is installed between the stop block groove 302 and the stop block 303; the elastic member 306 presses the stop block 303 towards the direction of the card slot.

[0060] It should be noted that the elastic member 306 is preferably a spiral spring; corresponding holes are provided at the connecting parts of the elastic member 306 with the stop block groove 302 and the stop block 303, and the two ends of the elastic member 306 falling into the holes can play a positioning role.

[0061] In specific implementation, the elastic member 306 presses the stopper 303 towards the card slot through elasticity, so that after the fan 2 is installed, the stopper 303 can fall into the card slot more stably and will not withdraw from the cooperation with the card slot due to vehicle bumps.

[0062] According to the embodiment provided by the present utility model, as Figure 2 shown, pin shafts 307 are fixedly installed at the four vertices of the ventilation window; spring 308 and positioning plate 309 are sequentially sleeved on the pin shafts 307; one end of the spring 308 is fixed on the inner wall of the carriage 1, and the other end is fixed on the positioning plate 309;

[0063] The positioning plate 309 can rotate around the pin shaft 307, and a positioning pin 310 is arranged on the side close to the ventilation window at the end away from the pin shaft 307;

[0064] Positioning pin 310 holes are provided at the four vertices on the side of the mounting plate 202 close to the fan 2, and the positioning pin 310 holes are equal in diameter to the positioning pin 310 and can cooperate with each other.

[0065] It should be noted that the pin shaft 307 is preferably fixed at the corresponding position by screws or welding; the two ends of the spring 308 are preferably fixed to the inner wall of the carriage 1 and the positioning plate 309 by welding; the positioning pin 310 is fixed to the positioning plate 309 by welding.

[0066] It should be noted that after the fan 2 is fixed to the positioning groove 301, the stopper groove 302 and the stopper 303 through the connecting plate 203, the positioning plate 309 is lifted and rotated by a certain angle so that the positioning pin 310 falls into the positioning pin 310 hole. At this time, the spring 308 fixes the positioning pin 310 of the positioning plate 309 in the positioning pin 310 hole through tension.

[0067] In specific implementation, by setting the structure of the pin shaft 307, the positioning plate 309 and the positioning pin 310, the fan 2 can be further fixed at the ventilation window of the carriage 1, increasing the stability of the fan 2.

[0068] In one embodiment, as Figure 3 and Figure 5 shown, the isolation cover 4 is a louver structure, including a window frame 401 and a plurality of louver blades 402; the window frame 401 is installed at a position close to the outside of the carriage 1 of the ventilation window; a plurality of the louver blades 402 are all horizontally and rotatably installed on the vertical sides of the window frame 401.

[0069] In specific implementation, by installing louvers at the ventilation window, when the fan 2 starts, the exhaust wind can open the louver blades to ventilate the compartment 1; when the fan 2 stops, the louver blades 402 automatically close under the action of gravity to isolate the air inside and outside the compartment 1 and prevent the cold air in the compartment 1 from escaping.

[0070] According to the implementation manner provided by the present utility model, as Figure 6 shown, connecting shafts 403 are provided at both ends of several of the louver blades 402; corresponding positions of the window frame 401 connected to both ends of several of the louver blades 402 are provided with connecting shaft holes 404, which are matched with the connecting shafts 403; a torsional elastic member 405 is installed between each connecting shaft hole 404 and the connecting shaft 403; one end of the torsional elastic member 405 is fixed on the inner wall of the connecting shaft hole 404, and the other end is fixed on the connecting shaft 403.

[0071] It should be noted that the torsional elastic member 405 is preferably in the form of a torsion spring; after the fan 2 starts, the louver blades 402 are opened by the wind force, and at the same time, the torsional elastic member 405 undergoes torsional deformation; after the fan 2 stops, the torsional elastic member 405 closes the louver blades 402 through its own elasticity.

[0072] In specific implementation, the addition of the torsional elastic member 405 can prevent the louver blades 402 from not closing tightly due to bumps during vehicle driving, resulting in the loss of cold air inside the compartment 1.

[0073] The working principle of the quick disassembly and assembly mechanism 3 is as follows: Before installing the fan 2, move the operating pin 305 so that the block 303 moves towards the block groove 302 against the pressure of the elastic member 306; insert the connecting plate 203 of the fan 2 into the positioning groove 301; release the operating pin 305, and the block 303 moves into the card slot of the connecting plate 203 under the pressure of the elastic member 306; at this time, the block 303 fixes the connecting plate 203 in the positioning groove 301, that is, fixes the fan 2 on the ventilation window; lift the four positioning plates 309 and rotate them by a certain angle, align the positioning pin 310 with the positioning pin 310 hole; release the positioning plate 309, and the positioning plate 309 moves towards the mounting plate 202 under the action of the spring tension, and the positioning pin 310 falls into the positioning pin 310 hole to further fix the fan 2. When disassembling, reverse the above process to quickly remove the fan 2.

[0074] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-described exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0075] In addition, it should be understood that although this specification is described in terms of embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A vehicle-mounted air exchange device, applied to a compartment of a refrigerated vehicle, characterized in that: Including a fan, a quick disassembly and assembly mechanism and an isolation cover; The fan has an air inlet on one side and an exhaust port on the other side; the quick disassembly mechanism is detachably connected to one side of the exhaust port and is used for quick installation and disassembly of the fan; The inner wall of the carriage is provided with a ventilation window connecting the inside and outside of the carriage; the quick disassembly and assembly mechanism is fixedly mounted on the inner wall of the carriage at two opposite sides of the ventilation window; The isolation cover is fixedly installed at a position of the ventilation window close to the outside of the compartment, and is used to exhaust air and reduce the air exchange between the inside and outside of the compartment; The quick disassembly and assembly mechanism comprises a positioning groove, a block groove and a block; The positioning grooves are provided on the inner wall of the carriage at two sides of the edges opposite to the ventilation window; The stopper groove is arranged on a side of the positioning groove away from the ventilation window; The stopper is installed in the stopper groove.

2. The vehicle-mounted air exchange device according to claim 1, characterized in that: A mounting plate is fixedly connected to one side of the exhaust port; connecting plates are fixedly installed on two opposite edges of the mounting plate respectively; and a card slot is provided on the opposite sides of the two connecting plates.

3. The vehicle-mounted air exchange device according to claim 2, characterized in that: The positioning groove has the same size as that of the connecting plate and is plugged into and matched with the connecting plate; The block groove is perpendicular to and connected with the positioning groove; The length and width of the stopper are equal to those of the card slot; when the connecting plate is plugged into the positioning slot, the stopper is aligned with the card slot and can slide between the stopper slot and the card slot.

4. The vehicle-mounted air exchange device according to claim 3, characterized in that: A long hole perpendicular to the positioning groove is provided on one side of the block groove close to the interior of the carriage; a manipulation pin is fixedly connected to one side of the block close to the long hole; the manipulation pin passes through the long hole from the inside of the positioning groove to the outside.

5. The vehicle-mounted air exchange device according to claim 3, characterized in that: An elastic component is installed between the block groove and the block; the elastic component presses the block toward the slot.

6. The vehicle-mounted air exchange device according to claim 2, characterized in that: The four vertices of the ventilation window are all fixedly mounted with pins; the pins are sequentially covered with springs and positioning plates; one end of the spring is fixed to the inner wall of the compartment, and the other end is fixed to the positioning plate; The positioning plate can rotate around the pin shaft, and a positioning pin is arranged on one end of the positioning plate away from the pin shaft and close to the ventilation window; The four vertices of the mounting plate on one side close to the fan are all provided with positioning pin holes, and the positioning pin holes and the positioning pins have the same diameter and can cooperate with each other.

7. The vehicle-mounted air exchange device according to claim 1, characterized in that: The isolation cover is a shutter structure, including a window frame and a plurality of shutter blades; the window frame is installed at a position of the ventilation window close to the outside of the vehicle compartment; the plurality of shutter blades are installed horizontally and rotatably on both vertical sides of the window frame.

8. The vehicle-mounted air exchange device according to claim 7, characterized in that: Connecting shafts are arranged at both ends of the plurality of shutter blades; connecting shaft holes are provided at corresponding positions where the window frame is connected to both ends of the plurality of shutter blades and cooperate with the connecting shafts; a torsion elastic component is installed between each connecting shaft hole and the connecting shaft; one end of the torsion elastic component is fixed to the inner wall of the connecting shaft hole, and the other end is fixed to the connecting shaft.

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