In-vehicle overhead air conditioning system and mounting method thereof

Abstract

The invention relates to the technical field of vehicle air conditioning system design, in particular to an in-vehicle overhead air conditioning system and a mounting method thereof. The in-vehicle overhead air-conditioning system comprises an air-conditioning evaporator fixedly mounted on a top framework at the top of a cab, an air inducing pipeline connected and communicated with a first air outlet of the air-conditioning evaporator, and at least two air cavities connected and communicated with the air inducing pipeline and distributed at different positions of the top of the cab, the air return cover is connected with an air return port of the air conditioner evaporator; the air-conditioning condenser and the air-conditioning compressor are fixedly mounted on a chassis outside a cab. The technical problems that the air conditioner requirement of a current diversified and multifunctional large cockpit cannot be well met, the space in the cockpit is occupied, the safety problem exists, and the interior and exterior of the cockpit are not attractive are solved.

Description

Technical Field

[0001] The present application relates to the technical field of vehicle air-conditioning system design, and in particular to a vehicle ceiling-mounted air-conditioning system and an installation method thereof. Background Art

[0002] At present, the air-conditioning system of the cockpit of most commercial vehicles and other vehicles is an air-conditioning system installed in the instrument panel, and the cold and warm air are blown into the cockpit through the air outlet on the instrument panel. However, with the diversified and multifunctional use of the cockpit, the space of the cockpit is getting larger and larger, and due to the space limitation of the instrument panel, only some small air-conditioning systems can be installed in the instrument panel, and the air-conditioning power is often not very high. At present, the air-conditioning system in the instrument panel can no longer meet the air-conditioning needs of the diversified and multi-functional cockpit. For example, some larger cockpits currently have a rest room, toilet, etc. at the rear, so the wind from the instrument panel cannot reach the rear of the cockpit.

[0003] In order to solve the above problems, a household air conditioner is usually installed in the cockpit. This is the common situation that an air conditioner external unit (including air conditioner compressor, condenser and other components) is carried on the back of the front of the bus, and the air conditioner internal unit (including air conditioner evaporator) is installed on the rear wall of the bus. However, on the one hand, because the external air conditioner is modified, its air conditioner external unit and air conditioner pipelines are exposed, which not only affects the appearance of the cockpit, but also poses certain safety issues; on the other hand, the air conditioner internal unit in the car is generally hung on the rear wall of the vehicle, which not only occupies the rear space of the cockpit, but also affects the overall effect of the cockpit interior. Summary of the invention

[0004] The purpose of the present application is to provide a roof-mounted air-conditioning system in a vehicle and an installation method thereof, so as to solve the technical problems of not being able to meet the air-conditioning requirements of the current diversified and multifunctional larger cockpits, occupying the space in the cabin, having safety issues, and the aesthetics of the interior and exterior of the cabin.

[0005] In a first aspect, the present application provides a vehicle ceiling air conditioning system, comprising:

[0006] An air conditioning evaporator fixedly mounted on a top frame on the top of the cockpit, an air duct connected to a first air outlet of the air conditioning evaporator, at least two air cavities connected to the air duct and located at different positions on the top of the cockpit, and an air return hood connected to the air return outlet of the air conditioning evaporator; and

[0007] The air conditioning condenser and air conditioning compressor are fixedly mounted on the chassis outside the cockpit;

[0008] Among them, the first air outlet of the air-conditioning evaporator sends cold and warm air into each of the air cavities through the air duct, and then blows the cold and warm air into the cockpit through the second air outlet on each of the air cavities, and the air-conditioning evaporator returns air through the return air hood.

[0009] Furthermore, the air conditioning evaporator is fixedly mounted on the rear section of the cockpit top;

[0010] The return air cover is fixedly mounted on the rear section of the cockpit top and is arranged adjacent to the return air outlet of the air-conditioning evaporator.

[0011] Further, the air duct includes a straight air duct section directly connected to the first air outlet of the air conditioner evaporator, and a left-bend air duct section and a right-bend air duct section respectively connected to opposite ends of the straight air duct section, and the left-bend air duct section and the right-bend air duct section are both bent toward opposite sides of the top of the cockpit;

[0012] A left wind cavity and a right wind cavity are respectively provided on two opposite sides of the cockpit top, and the left wind cavity and the right wind cavity are respectively extended along the lateral extension direction of the left side and the right side of the cockpit top;

[0013] The second air inlet ports of the left-bend air inlet duct section and the right-bend air inlet duct section are respectively connected to the first air inlet ports of the left-side air cavity and the right-side air cavity.

[0014] Furthermore, the air duct, the left air cavity and the right air cavity form a semi-surrounding central shape structure on the top of the cockpit;

[0015] The height of the bottom of the central part of the semi-circular central shape structure is higher than the height of the bottom of the semi-circular part formed by the air duct, the left wind cavity and the right wind cavity.

[0016] Furthermore, the top of the straight air duct section of the air duct protrudes upward and is provided with an air inlet portion connected to the interior of the straight air duct section;

[0017] The opening side of the air inlet portion facing the first air outlet is a first air inlet, and the first air inlet is sealed with the first air outlet. A top plate is provided on the top of the air inlet portion, and opposite sides of the air inlet portion are respectively provided with a first inclined plate and a second inclined plate inclined downward from the top plate to both sides.

[0018] Furthermore, a side of the air inlet portion opposite to the first air inlet is provided as a third inclined plate inclined downward from the top plate in a direction away from the first air inlet;

[0019] The first inclined plate, the second inclined plate, the third inclined plate and the top plate are connected to form the air inlet portion.

[0020] Furthermore, the included angles between the first inclined plate, the second inclined plate and the third inclined plate and the top plate are 120° to 150°.

[0021] Furthermore, the second air induction outlets of the left-bend air induction duct section and the right-bend air induction duct section are configured as downwardly directed chamfered surfaces, and the outer peripheral edges of the second air induction outlets are provided with flange edges;

[0022] Correspondingly, the first air inlet of the left air cavity and the right air cavity is configured as an upward inlet oblique cut surface that matches the second air outlet.

[0023] Furthermore, a front air cavity is provided at the front section of the cockpit top, and opposite sides of the front air cavity are respectively connected with the left air cavity and the right air cavity through connecting pipes.

[0024] Furthermore, the in-vehicle roof-mounted air-conditioning system also includes a roof interior covering the air-conditioning evaporator, the air duct, the air cavity and the return air hood, the second air outlet of the air cavity is arranged through the roof interior, the roof interior is provided with a return air grille cover at a position corresponding to the return air grille of the return air hood, and the roof interior forms a structural shape with the outer periphery protruding downward around the center.

[0025] Furthermore, a long hole is opened on the side of the air duct, and the air duct is also provided with a cover plate capable of covering and closing the long hole; and / or

[0026] The connection lines connecting the air-conditioning condenser and the air-conditioning compressor with the air-conditioning evaporator are hidden and arranged at the side frame position of the cockpit.

[0027] In a second aspect, the present application provides a method for installing a roof-mounted air conditioning system in a vehicle, based on the roof-mounted air conditioning system in the vehicle as described in any of the above items, wherein the installation method comprises:

[0028] Step 100, firstly, the air duct is installed on the top frame of the cockpit through its own air duct bracket, and then a sealing sponge strip is pasted on the circumferential edge of the first air inlet of the air duct portion of the air duct that is connected to the first air outlet of the air conditioner evaporator;

[0029] Step 200, install the air conditioner evaporator, the top frame is pre-set with downward bolts, the mounting holes on the evaporator mounting bracket of the air conditioner evaporator are aligned with the bolts and pushed upward into place, at this time, the first air outlet of the air conditioner evaporator is aligned with the first air inlet of the air inlet portion of the air inlet duct, and then squeeze backward through the waist hole on the evaporator mounting bracket to press the surrounding sealing sponge strips to achieve sealing at the first air outlet of the air conditioner evaporator;

[0030] Step 300, installing the ceiling interior, after fixing the air conditioner evaporator and connecting the pipelines on the air conditioner evaporator, installing the ceiling interior;

[0031] Step 400, the second air outlet of the air duct is connected to the first air inlet of the air cavity, and a sealing sponge is bonded to the flange edge of the second air outlet on the beveled surface. When the top interior is installed, it is pushed vertically upward, and the sealing sponge bonded to the flange edge of the second air outlet is pressed to achieve sealing.

[0032] Further, in step 300, the roof interior is divided into two parts, namely, the front roof interior and the rear roof interior. The front roof interior is installed first and fixed to the top of the cockpit and the angle iron on the upper edge of the front wall by self-tapping screws, and then the rear roof interior is installed from bottom to top; and / or

[0033] In step 400, it also includes:

[0034] Remove the air outlet cover plates corresponding to the air cavity positions on the ceiling interior, put your hands into the air cavity and stick PE cotton with aluminum foil to connect the air duct and the air cavity as a whole; and / or

[0035] By opening the return air grille cover of the return air grille, the gap between the return air cover in the ceiling interior and the return air outlet of the air conditioner evaporator is glued with PE cotton with aluminum foil to achieve sealing at the return air outlet.

[0036] Compared with the prior art, the in-vehicle roof-mounted air-conditioning system and its installation method provided by the present application, through the combination of the roof-mounted air-conditioning structure design and the split-type air-conditioning structure design, the air-conditioning evaporator, air duct, air cavity and return air hood are fixedly installed on the top of the cockpit, and the air-conditioning condenser and the air-conditioning compressor are fixedly installed on the chassis outside the cockpit, so as to minimize the space occupied in the cabin and save the internal space of the cabin. At the same time, the roof-mounted air-conditioning system can distribute multiple air cavities (such as the left air cavity, the right air cavity and the front air cavity) at multiple positions on the top of the cockpit 200, and directly deliver them to different positions in the cockpit, thereby improving the overall use effect of the air conditioning. , improving the overall comfort of each position in the cabin, and at the same time greatly increasing the air outlets and air volume. Compared with the prior art that only uses a low-power air conditioner in the instrument panel to exhaust air, the in-vehicle roof-mounted air-conditioning system of the present application is not limited by the space in the instrument panel, has more air outlets, a large air volume, greater power, and better air-conditioning comfort, which solves the problem of insufficient air-conditioning effect at the instrument panel; compared with the prior art that a household air conditioner is installed in the cockpit 200, there is no need to install an air-conditioning indoor unit in the car, the interior has good integrity, and the available space in the cabin is larger. There is no need to install an air-conditioning outdoor unit outside the car, which improves the aesthetics of the vehicle's appearance and eliminates the potential safety hazards caused by an external air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic diagram of the overall structure of a cockpit equipped with a roof-mounted air conditioning system provided by an embodiment of the present application;

[0039] Figure 2 A partial structural side view of a cockpit equipped with a roof-mounted air conditioning system provided by an embodiment of the present application;

[0040] Figure 3 A schematic diagram of the internal structure of the top of a cockpit in which the in-vehicle roof-mounted air conditioning system provided by an embodiment of the present application is installed;

[0041] Figure 4 A schematic diagram of the external structure of the top of a cockpit in which the roof-mounted air conditioning system provided by an embodiment of the present application is installed;

[0042] Figure 5 A schematic diagram of the structure of the air duct of the roof-mounted air conditioning system in a vehicle provided in an embodiment of the present application;

[0043] Figure 6A schematic structural diagram of the air duct of the roof-mounted air conditioning system in a vehicle provided by an embodiment of the present application from another angle;

[0044] Figure 7 Schematic diagram of the air flow direction of the roof-mounted air conditioning system in the vehicle provided in the embodiment of the present application Figure 1 ;

[0045] Figure 8 Schematic diagram of the air flow direction of the roof-mounted air conditioning system in the vehicle provided in the embodiment of the present application Figure 2 ;

[0046] Fig. 9 A schematic diagram of the structure of the right side air chamber of the roof-mounted air conditioning system in a vehicle provided in an embodiment of the present application;

[0047] Fig.10 This is a schematic diagram of the overall structure of the cockpit framework provided in an embodiment of the present application;

[0048] Fig.11 This is a schematic diagram of the overall structure of the cockpit skeleton provided in an embodiment of the present application from another angle.

[0049] Reference numerals:

[0050] 10- Air conditioner evaporator;

[0051] 11-first air outlet; 20-air duct;

[0052] 21-direct air duct section;

[0053] 211-air inlet;

[0054] 2111-first air inlet;

[0055] 2112-top plate;

[0056] 2113-first inclined plate;

[0057] 2114-second inclined plate;

[0058] 2115-third inclined plate;

[0059] 22-left bend air duct section;

[0060] 23-Right bend air duct section;

[0061] 241- second air outlet;

[0062] 242-flange;

[0063] 251-long hole;

[0064] 252-cover plate;

[0065] 31-left wind cavity;

[0066] 32-right wind cavity;

[0067] 33-first air inlet;

[0068] 331- Sealing sponge;

[0069] 34- Second air outlet;

[0070] 40-return air hood;

[0071] 50-top interior;

[0072] 51-Central part;

[0073] 52-air outlet cover;

[0074] 53-return air grille cover;

[0075] 60-air conditioning condenser;

[0076] 61-first connection line;

[0077] 70-air conditioning compressor;

[0078] 71- second connection line;

[0079] 200 - cockpit;

[0080] 201-top frame;

[0081] 202- side frame;

[0082] 203-Chassis. DETAILED DESCRIPTION

[0083] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0084] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0085] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0086] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0087] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0088] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0089] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0090] An embodiment of the present application provides an in-vehicle roof-mounted air-conditioning system, which can be used in the cockpit of a commercial vehicle, and can also be used in other independent, closed cabins, such as refrigerated chain containers, RVs, buses and other vehicle compartments.

[0091] like Figures 1 to 11As shown, the in-vehicle roof-mounted air-conditioning system provided by the embodiment of the present application includes an air-conditioning evaporator 10 fixedly mounted on a top frame 201 on the top of a cockpit 200, an air duct 20 connected to and communicated with a first air outlet 11 of the air-conditioning evaporator 10, at least two air chambers (such as a left air chamber 31, a right air chamber 32 and a front air chamber) connected to and communicated with the air duct 20 and distributed at different positions on the top of the cockpit 200, and a return air hood 40 connected to the return air outlet of the air-conditioning evaporator 10; and an air-conditioning condenser 60 and an air-conditioning compressor 70 fixedly mounted on a chassis 203 outside the cockpit 200. Preferably, the first connection line 61 and the second connection line 71 connecting the air-conditioning condenser 60 and the air-conditioning compressor 70 to the air-conditioning evaporator 10 are hidden in the side frame 202 of the cockpit 200, which can avoid the safety hazard of exposed lines, improve safety, and improve the aesthetics of the cabin interior. Among them, the first air outlet 11 of the air-conditioning evaporator 10 sends cold and warm air to each air cavity through the air duct 20, and then blows it into the cockpit 200 through the second air outlet 34 on each air cavity. The air-conditioning evaporator 10 returns air through the return air hood 40, thereby realizing the air-conditioning outlet and return air functions of the cockpit 200.

[0092] Compared with the prior art, the in-vehicle roof-mounted air-conditioning system and its installation method provided in the embodiment of the present application, through the combination of the roof-mounted air-conditioning structure design and the split-type air-conditioning structure design, the air-conditioning evaporator 10, the air duct 20, the air cavity and the return air cover 40 are fixedly installed on the top of the cockpit 200, and the air-conditioning condenser 60 and the air-conditioning compressor 70 are fixedly installed on the chassis 203 outside the cockpit 200, so as to minimize the space occupied in the cabin and save the internal space of the cabin. At the same time, the roof-mounted air-conditioning system can be distributed at multiple positions on the top of the cockpit 200 to set multiple air cavities (such as the left air cavity 31, the right air cavity 32 and the front air cavity), and directly deliver air to different Position, improve the overall use effect of air conditioning, improve the overall comfort of each position in the cabin, and at the same time greatly increase the air outlets and air volume. Compared with the prior art that only uses a low-power air conditioner in the instrument panel to exhaust air, the in-vehicle roof-mounted air-conditioning system in the embodiment of the present application is not limited by the space in the instrument panel, has more air outlets, a large air volume, greater power, and better air-conditioning comfort, which solves the problem of insufficient air conditioning effect at the instrument panel; compared with the prior art that a household air conditioner is installed in the cockpit 200, there is no need to install an air-conditioning indoor unit in the car, the interior has good integrity, and the available space in the cabin is larger. There is no need to install an air-conditioning outdoor unit outside the car, which improves the aesthetics of the vehicle appearance and eliminates the potential safety hazards caused by an external air conditioner.

[0093] like Figure 1 and Figure 2As shown, in order to minimize the occupation of the center top space in the cabin and maximize the space in the center of the cabin, the aforementioned air-conditioning evaporator 10 can be installed as far back as possible, preferably fixedly installed at the rear section of the top of the cockpit 200, and the air-conditioning evaporator 10 is installed as close to the top frame 201 as possible to maximize the space in the bottom cabin; similarly, the return air hood 40 is also moved as far back as possible, and the return air hood 40 is also preferably fixedly installed at the rear section of the top of the cockpit 200, and installed as close to the top frame 201 as possible, and is arranged adjacent to the return air outlet of the air-conditioning evaporator 10, so as to facilitate the connection between the return air hood 40 and the return air outlet of the air-conditioning evaporator 10.

[0094] Regarding the aforementioned air duct 20, a specific embodiment is as follows: Figure 3 , Figure 5 and Figure 6 As shown, the air duct 20 may specifically include a straight air duct section 21 directly connected to the first air outlet 11 of the air conditioner evaporator 10 and sealed, and a left-bend air duct section 22 and a right-bend air duct section 23 connected to opposite ends of the straight air duct section 21, respectively. The left-bend air duct section 22 and the right-bend air duct section 23 are both bent toward opposite sides of the top of the cockpit 200 to facilitate air supply. It is preferred that the bends are rounded to reduce wind resistance and wind loss.

[0095] Furthermore, a left wind cavity 31 and a right wind cavity 32 may be respectively provided on opposite sides of the top of the cockpit 200, and the left wind cavity 31 and the right wind cavity 32 may be respectively extended along the lateral extension direction of the left side and the right side of the top of the cockpit 200; the second air outlet 241 of the left return bend air duct section 22 and the second air outlet 241 of the right return bend air duct section 23 are respectively connected to the first air inlet 33 of the left wind cavity 31 and the first air inlet 33 of the right wind cavity 32, as shown in FIG. Figure 8 As shown, the left bend air induction pipe section 22 and the right bend air induction pipe section 23 are convenient for smoothly sending the wind to the left wind cavity 31 and the right wind cavity 32. In this way, the air supply duct design is smoother, the air supply resistance is small, the air volume loss is small, and the air supply effect is good.

[0096] like Figure 3 As shown, the air outlet (i.e., the first air outlet 11) of the air conditioner evaporator 10 is generally located at the rear and upper part of the air conditioner evaporator 10. Based on this, it is further preferred that, as Figure 5 and Figure 6As shown, the top of the straight air duct section 21 of the aforementioned air duct 20 can protrude upward and be provided with an air inlet portion 211 that is connected to the interior of the straight air duct section 21, and the opening side of the air inlet portion 211 facing the first air outlet 11 is a first air inlet 2111, and the first air inlet 2111 is sealed with the first air outlet 11, and can be sealed by a sealing strip, and a top plate 2112 is provided on the top of the air inlet portion 211, and the opposite sides of the air inlet portion 211 are respectively provided with a first inclined plate 2113 and a second inclined plate 2114 that are inclined downward to both sides from the top plate 2112.

[0097] In this way, the air from the first air outlet 11 at the rear and upper position of the air conditioner evaporator 10 can be guided into each air cavity while minimizing the loss of air volume and wind speed. Figure 7 and Figure 8 As shown, the wind coming out of the first air outlet 11 of the air-conditioning evaporator 10 first passes through the first inclined plate 2113 and the second inclined plate 2114 obliquely downward and to both sides, and guides the wind downward and to both sides into the horizontal straight air duct section 21, and then passes through the left-return air duct section 22 and the right-return air duct section 23 on both sides to send the wind to the left air cavity 31 and the right air cavity 32 respectively.

[0098] The first inclined plate 2113 and the second inclined plate 2114 are arranged to be inclined downward, which can minimize the loss of wind speed potential energy and have strong guiding performance. If the plates on both sides are vertical, the wind coming out of the first air outlet 11 of the air-conditioning evaporator 10 will be directly blocked by the vertical plates, and the wind speed potential energy is greatly reduced. The structural design of the air duct 20 conforms to the principles of fluid mechanics, is more fluent and smooth, can quickly and effectively guide the air-conditioning wind into each wind cavity, will not form eddy currents in the wind flow process, reduce the wind speed loss after encountering obstacles, can more effectively transfer the air-conditioning wind to each wind cavity, and send it to the cabin through the air outlet of each wind cavity (i.e., the second air outlet 34). The inclination angles of the first inclined plate 2113 and the second inclined plate 2114 can also be as small as possible, and the angle with the top plate 2112 is 120° to 150° to minimize the loss of wind speed potential energy.

[0099] Further preferably, the side of the aforementioned air inlet 211 opposite to the first air inlet 2111 can also be provided with a third inclined plate 2115 inclined downward from the top plate 2112 in a direction away from the first air inlet 2111, which can further improve the guiding performance and further reduce the loss of wind speed and air volume. Specifically, the inclination angle of the third inclined plate 2115 can also be as small as possible, and the angle with the top plate 2112 is 120° to 150°, so as to minimize the loss of wind speed potential energy. Specifically, the first inclined plate 2113, the second inclined plate 2114, the third inclined plate 2115 and the top plate 2112 can be connected to form the integral air inlet 211.

[0100] In order to further minimize the use of the frequently used central space in the cabin and to maximize the height of the center top, so as to maximize the height of the center top in the vehicle and optimize the use of the space in the vehicle, a more preferred embodiment is as follows: Figure 2 , Figure 3 , Figure 4 and Figure 8 As shown, the aforementioned air duct 20 and the left air cavity 31 and the right air cavity 32 form a semi-circular central shape structure at the top of the cockpit 200, and the height of the bottom of the central part of the semi-circular central shape structure is higher than the height of the bottom of the semi-circular part formed by the air duct 20, the left air cavity 31 and the right air cavity 32. This further increases the height of the central part of the cabin and maximizes the available space in the cabin. Furthermore, the aforementioned air duct 20, the left air cavity 31 and the right air cavity 32 can be arranged symmetrically along the central axis.

[0101] A preferred embodiment is that the front section of the top of the cockpit 200 may be provided with a front air cavity, and the opposite sides of the front air cavity may be connected to the aforementioned left air cavity 31 and right air cavity 32 respectively through connecting pipes. On the one hand, the front air cavity may be provided with an air outlet corresponding to the front windshield, which can realize the defrosting and defogging function on the front windshield. On the other hand, it can directly replace the existing technology of air outlet at the instrument panel in front of the cockpit. The comfort of the top air outlet is better than that of the instrument panel, and the air outlet is larger, the air volume is larger, the power is higher, and the air outlet effect is better. Especially in summer, the cold air goes downward and the hot air goes upward. The cold air from the top air outlet covers downward, which can quickly achieve the cooling effect of the cockpit. Moreover, because the cockpit temperature is reduced relatively quickly, the balance of the cockpit outlet and return air can be quickly achieved, and the problem of air conditioning condensation caused by the temperature difference can also be solved.

[0102] An optional embodiment is as follows Figure 5 , Figure 6 and Fig. 9 As shown, the cross-section of the second air outlet 241 of the aforementioned left-turn air duct section 22 and the right-turn air duct section 23 can be set as an inclined surface with the outlet facing downward, and the outer peripheral edge of the second air outlet 241 can be provided with a flange edge 242. Correspondingly, the cross-section of the first air inlet 33 of the aforementioned left-hand air cavity 31 and the right-hand air cavity 32 can be set as an inclined surface with the inlet facing upward that matches the second air outlet 241. With this design, the top interior decoration 50 is pushed vertically upward during installation. Since the interfaces of the aforementioned two are inclined surfaces, the gap will become smaller, the structural connection will be more stable, and the sealing here can be achieved by pressing with a sealing sponge bonded to the flange edge 242.

[0103] Another optional embodiment is, Figure 4As shown, the in-vehicle ceiling air conditioning system provided by the embodiment of the present application further includes a ceiling interior 50, which covers the aforementioned air conditioning evaporator 10, the air duct 20, each air cavity and the return air cover 40, etc. The second air outlet 34 of the air cavity is set through the ceiling interior 50, and the ceiling interior 50 can be provided with an air outlet cover 52 at a corresponding position, and the ceiling interior 50 can be provided with a return air grille cover 53 at a position corresponding to the return air grille of the return air cover 40. And preferably, the ceiling interior 50 forms a structural shape with the outer periphery protruding downward and surrounding the center, such as Figure 4 The central portion 51 of the top interior trim 50 shown in the figure maximizes the height of the central portion, and the central portion 51 is the highest, thereby maximizing the available space in the vehicle.

[0104] Considering the condensation problem caused by temperature difference on the air conditioning duct in the humid environment in summer, PE cotton with aluminum foil needs to be pasted inside and outside the air conditioning duct, which can keep warm and prevent heat transfer. However, because the induced air duct is relatively long, the inner wall cannot be pasted with cotton. Therefore, the side of the induced air duct 20 can be opened with a long hole 251, and the induced air duct 20 is also provided with a cover plate 252 that can cover and close the long hole 251, so as to facilitate the pasting of cotton and glue inside the duct. Furthermore, in order to facilitate the fixing of the cover plate 252, the outer peripheral edge of the long hole 251 can also be provided with a rivet nut, and the cover plate 252 is fixed with bolts.

[0105] In addition, based on the above-mentioned in-vehicle ceiling air conditioning systems, the present application also provides an installation method of the in-vehicle ceiling air conditioning system, including:

[0106] Step 100, first install the air duct 20 on the top frame 201 of the cockpit 200 through its own air duct bracket, and then stick a sealing sponge strip on the circumferential edge of the first air inlet 2111 of the air duct portion 211 of the air duct 20 that is connected to the first air outlet 11 of the air-conditioning evaporator 10, which is used for sealing around the first air outlet 11 after the connection with the air-conditioning evaporator 10. Preferably, a 20mm thick sealing sponge strip is used.

[0107] Step 200, install the air-conditioning evaporator 10, and reserve downward bolts on the top frame 201. The mounting holes on the evaporator mounting bracket of the air-conditioning evaporator 10 are aligned with the bolts and pushed upward into place. At this time, the first air outlet 11 of the air-conditioning evaporator 10 is directly opposite to the first air inlet 2111 of the air inlet portion 211 of the air duct 20. Then, squeeze backwards through the waist hole on the evaporator mounting bracket to tighten the surrounding sealing sponges 331 to achieve sealing at the first air outlet 11 of the air-conditioning evaporator 10.

[0108] Step 300, installing the ceiling interior 50, after fixing the air conditioning evaporator 10 and connecting the pipelines on the air conditioning evaporator 10, installing the ceiling interior 50;

[0109] Among them, the roof interior 50 is divided into two parts, namely, the front roof interior 50 and the rear roof interior 50. The front roof interior 50 is installed first, fixed to the top of the cockpit 200 and the angle iron on the upper edge of the front enclosure by self-tapping screws, and then the rear roof interior 50 is installed from bottom to top.

[0110] Step 400, the second air outlet 241 of the air duct 20 is connected to the first air inlet 33 of the air cavity, and a sealing sponge 331 is bonded to the flange edge 242 of the second air outlet 241 on the beveled surface. When the top interior 50 is installed, it is pushed vertically upward, and the sealing sponge 331 bonded to the flange edge 242 of the second air outlet 241 is pressed to achieve sealing;

[0111] In this step, a difficulty is solved. Because after the rear top interior is buckled up and installed, there is no space to process the matching gap between the left-turned air duct section 22 and the right-turned air duct section 23 of the air duct 20 and the left-side air cavity 31 and the right-side air cavity 32, and the matching error between the two is relatively large. In order to solve this installation difficulty, the embodiment of the present application sets the second air outlet 241 of the left-turned air duct section 22 and the right-turned air duct section 23 as an inclined surface with the outlet downward, and correspondingly sets the first air inlet 33 of the left-side air cavity 31 and the right-side air cavity 32 as an inclined surface with the inlet upward that matches the second air outlet 241. With this design, the top interior 50 is pushed vertically upward during installation. Because it is a beveled surface, the gap with the flange edge of the air duct will become smaller, and the sealing here is achieved by pressing the sealing sponge bonded to the flange edge 242.

[0112] In order to ensure the reliability of the sealing of the interface here, the air outlet cover plates 52 corresponding to the positions of the air cavities on the top interior 50 are removed, and the hands are put into the air cavity to stick PE cotton with aluminum foil to connect the air duct 20 and the air cavity as a whole.

[0113] Furthermore, a detachable return air grille with a hinge is designed at the return air hood 40. By opening the return air grille cover 53 on the top interior 50, PE cotton with aluminum foil can be glued to the gap between the return air hood 40 and the return air outlet of the air-conditioning evaporator 10 to achieve sealing at the return air outlet.

[0114] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A roof-mounted air conditioning system in a vehicle, characterized in that: include: An air conditioning evaporator fixedly mounted on a top frame on the top of the cockpit, an air duct connected to and in communication with a first air outlet of the air conditioning evaporator, at least two air cavities connected to and in communication with the air duct and distributed at different positions on the top of the cockpit, and an air return hood connected to an air return outlet of the air conditioning evaporator; and The air conditioning condenser and air conditioning compressor are fixedly mounted on the chassis outside the cockpit; Among them, the first air outlet of the air-conditioning evaporator sends cold and warm air into each of the air cavities through the air duct, and then blows the cold and warm air into the cockpit through the second air outlet on each of the air cavities, and the air-conditioning evaporator returns air through the return air hood.

2. The vehicle ceiling air conditioning system according to claim 1, characterized in that: The air conditioning evaporator is fixedly mounted on the rear section of the cockpit top; The return air cover is fixedly mounted on the rear section of the cockpit top and is arranged adjacent to the return air port of the air conditioner evaporator.

3. The vehicle ceiling air conditioning system according to claim 2, characterized in that: The air duct includes a straight air duct section directly connected to the first air outlet of the air conditioner evaporator, and a left-bend air duct section and a right-bend air duct section respectively connected to opposite ends of the straight air duct section, and the left-bend air duct section and the right-bend air duct section are both bent toward opposite sides of the top of the cockpit; A left wind cavity and a right wind cavity are respectively provided on two opposite sides of the cockpit top, and the left wind cavity and the right wind cavity are respectively extended along the lateral extension direction of the left side and the right side of the cockpit top; The second air inlet ports of the left-bend air inlet duct section and the right-bend air inlet duct section are respectively connected to the first air inlet ports of the left-side air cavity and the right-side air cavity.

4. The vehicle ceiling-mounted air conditioning system according to claim 3, characterized in that: The air duct, the left air cavity and the right air cavity form a semi-surrounding central shape structure on the top of the cockpit; The height of the bottom of the central part of the semi-circular central shape structure is higher than the height of the bottom of the semi-circular part formed by the air duct, the left wind cavity and the right wind cavity.

5. The vehicle ceiling-mounted air conditioning system according to claim 3 or 4, characterized in that: The top of the straight air duct section of the air duct is upwardly protruding and is provided with an air inlet portion connected to the interior of the straight air duct section; The opening side of the air inlet portion facing the first air outlet is a first air inlet, and the first air inlet is sealed with the first air outlet. A top plate is provided on the top of the air inlet portion, and opposite sides of the air inlet portion are respectively provided with a first inclined plate and a second inclined plate inclined downward from the top plate to both sides.

6. The vehicle ceiling-mounted air conditioning system according to claim 5, characterized in that: A side of the air inlet portion opposite to the first air inlet is provided with a third inclined plate inclined downward from the top plate in a direction away from the first air inlet; The first inclined plate, the second inclined plate, the third inclined plate and the top plate are connected to form the air inlet portion.

7. The vehicle ceiling-mounted air conditioning system according to claim 6, characterized in that: The included angles between the first inclined plate, the second inclined plate and the third inclined plate and the top plate are 120° to 150°.

8. The vehicle ceiling-mounted air conditioning system according to claim 3, characterized in that: The second air induction outlets of the left-bend air induction pipe section and the right-bend air induction pipe section are configured as downwardly directed inclined surfaces, and the outer peripheral edges of the second air induction outlets are provided with flange edges; Correspondingly, the first air inlet of the left air cavity and the right air cavity is configured as an upward inlet oblique cut surface that matches the second air outlet.

9. The vehicle ceiling-mounted air conditioning system according to claim 3, characterized in that: A front air cavity is provided at the front section of the cockpit top, and opposite sides of the front air cavity are respectively connected with the left air cavity and the right air cavity through connecting pipes.

10. The vehicle ceiling-mounted air conditioning system according to claim 3, characterized in that: It also includes a ceiling interior covering the air-conditioning evaporator, the air duct, the air cavity and the return air hood. The second air outlet of the air cavity is arranged through the ceiling interior. The ceiling interior is provided with a return air grille cover at a position corresponding to the return air grille of the return air hood. The ceiling interior forms a structural shape with the outer periphery protruding downward and surrounding the center.

11. The vehicle ceiling air conditioning system according to claim 1, characterized in that: The side of the air duct is provided with a long hole, and the air duct is further provided with a cover plate capable of covering and closing the long hole; and / or The connection lines connecting the air-conditioning condenser and the air-conditioning compressor with the air-conditioning evaporator are hidden and arranged at the side frame position of the cockpit.

12. A method for installing a roof-mounted air conditioning system in a vehicle, based on the roof-mounted air conditioning system in a vehicle according to any one of claims 1 to 11, characterized in that: The installation method comprises: Step 100, firstly, the air duct is installed on the top frame of the cockpit through its own air duct bracket, and then a sealing sponge strip is pasted on the circumferential edge of the first air inlet of the air duct portion of the air duct that is connected to the first air outlet of the air conditioner evaporator; Step 200, install the air conditioner evaporator, the top frame is pre-set with downward bolts, the mounting holes on the evaporator mounting bracket of the air conditioner evaporator are aligned with the bolts and pushed upward into place, at this time, the first air outlet of the air conditioner evaporator is aligned with the first air inlet of the air inlet portion of the air inlet duct, and then squeeze backward through the waist hole on the evaporator mounting bracket to press the surrounding sealing sponge strips to achieve sealing at the first air outlet of the air conditioner evaporator; Step 300, installing the ceiling interior, after fixing the air conditioner evaporator and connecting the pipelines on the air conditioner evaporator, installing the ceiling interior; Step 400, the second air outlet of the air duct is connected to the first air inlet of the air cavity, and a sealing sponge is bonded to the flange edge of the second air outlet on the beveled surface. When the top interior is installed, it is pushed vertically upward, and the sealing sponge bonded to the flange edge of the second air outlet is pressed to achieve sealing.

13. The method for installing a roof-mounted air conditioning system in a vehicle according to claim 12, characterized in that: In step 300, the roof interior is divided into two parts, namely, the front roof interior and the rear roof interior. The front roof interior is installed first and fixed to the top of the cockpit and the angle iron on the upper edge of the front enclosure by self-tapping screws, and then the rear roof interior is installed from bottom to top; and / or In step 400, it also includes: Remove the air outlet cover plates corresponding to the air cavity positions on the top interior, put your hands into the air cavity and stick PE cotton with aluminum foil to connect the air duct and the air cavity as a whole; and / or By opening the return air grille cover of the return air grille, the gap between the return air cover in the ceiling interior and the return air outlet of the air conditioner evaporator is glued with PE cotton with aluminum foil to achieve sealing at the return air outlet.

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