CN114348122A - Driver's cabin outer roof with independent air duct of self-forming air conditioner and pressure relief function - Google Patents
Driver's cabin outer roof with independent air duct of self-forming air conditioner and pressure relief function Download PDFInfo
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- CN114348122A CN114348122A CN202210000923.1A CN202210000923A CN114348122A CN 114348122 A CN114348122 A CN 114348122A CN 202210000923 A CN202210000923 A CN 202210000923A CN 114348122 A CN114348122 A CN 114348122A
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Abstract
An external top of a cab with an independent air duct of an air conditioner and a pressure relief function comprises an upper external top closing member, a lower external top closing member, an air conditioning system, an interior trim closing member and a cab framework; the outer top upper and lower combined piece is fixedly arranged on the cab framework and is formed by bonding and screwing the outer top upper piece and the outer top lower piece; the lower part of the outer top upper closing piece and the lower part of the outer top is also provided with an inner top closing piece fixed on a cab framework, the two sides of the inner top closing piece and the two sides of the outer top lower closing piece are respectively enclosed into a left side cloth pipe cavity and a right side cloth pipe cavity for arranging pipelines of an air conditioning system, the outer top can form an outer top structure of an independent inner and outer circulation air channel and an air outlet air channel without using other air channel parts except the outer top, and therefore the air channel structure is simplified, the number of parts is reduced, and the product cost is reduced. Meanwhile, the outer top is assembled on a sealed cab and has a pressure relief function.
Description
Technical Field
The invention belongs to the technical field of agricultural machinery, and particularly relates to an external top of a cab, which is an independent air duct of an air conditioner and has a pressure relief function.
Background
The external roof of the agricultural machinery cab can improve the appearance effect of the tractor as a key component of the cab, and has the functions of installing an air conditioner, insulating sound, reducing noise and the like. At present, no matter the air conditioner is installed to the front or the rear of taking on the external top of domestic agricultural machinery driver's cabin, its air conditioner inside and outside circulation wind channel and air-out wind channel have three kinds usually: 1. there are no independent internal and external circulation air duct and air outlet duct; 2. the air conditioner is provided with an inner circulation air duct, an outer circulation air duct and an air outlet air duct which are independent; 3. there are some independent internal and external circulation air ducts or air outlet ducts; bellows or blow-molded parts are commonly used for modes 2 and 3 and are mounted on the outer roof to form a separate air duct. And the outer top does not have the pressure relief function.
Disclosure of Invention
In order to solve the technical problems, the invention provides the cab outer roof which is self-formed into the independent air duct of the air conditioner and has the pressure relief function, the outer roof can form an outer roof structure of the independent inner and outer circulating air duct and the independent air outlet duct, and the structure does not need to form the independent inner and outer circulating air duct and the independent air outlet duct by using other air duct parts except the outer roof, so that the air duct structure is simplified, the number of parts is reduced, and the product cost is reduced. Meanwhile, the outer top is assembled on a sealed cab and has a pressure relief function.
In order to realize the technical purpose, the adopted technical scheme is as follows: an external top of a cab with an independent air duct of an air conditioner and a pressure relief function comprises an upper external top closing member, a lower external top closing member, an air conditioning system, an interior trim closing member and a cab framework;
the outer top upper and lower combined piece is fixedly arranged on the cab framework and is formed by bonding and screwing the outer top upper piece and the outer top lower piece;
an air conditioning system installation cavity, a left fresh air return air duct, a right fresh air return air duct, a left fresh air closed cavity, a right fresh air closed cavity, a left air outlet circulation closed air duct, a right air outlet circulation closed air duct, a left pressure relief closed cavity and a right pressure relief closed cavity are formed between the outer top upper part and the outer top lower part; the outer top lower piece is provided with an H port and an I port which are communicated with the outside of the cab;
the air conditioning system installation cavity is used for installing an air conditioning system, a blower of the air conditioning system is respectively communicated with the left fresh air return air duct and the right fresh air return air duct, the left fresh air return air duct and the right fresh air return air duct are respectively provided with a port P and a port P' which are communicated with a cab, and pressure release valves A are arranged in the left fresh air return air duct and the right fresh air return air duct;
the left fresh air closed cavity is communicated with the left fresh air return air duct and the H port on the corresponding side, and the right fresh air closed cavity and the right fresh air return air duct are communicated with the H port on the corresponding side;
the left air outlet of the air inlet air conditioning system of the left air-out circulation closed air duct is correspondingly arranged, the air inlet of the right air-out circulation closed air duct is respectively correspondingly arranged with the right air outlet of the air conditioning system, and the left air-out circulation closed air duct and the right air-out circulation closed air duct are both provided with air outlets communicated with the cab;
the left pressure relief closed cavity and the right pressure relief closed cavity are respectively communicated with the I port on the corresponding side, and the left pressure relief closed cavity and the right pressure relief closed cavity are respectively provided with a pressure relief valve B;
an inner decoration top piece fixed on a cab framework is further installed below the outer top upper and lower piece, a left side pipe distribution cavity and a right side pipe distribution cavity for arranging air conditioning system pipelines are respectively defined by the inner decoration top piece and two sides of the outer top lower piece, the left side pipe distribution cavity and the right side pipe distribution cavity are communicated with a cab, and a pressure release valve A and a pressure release valve B are arranged in the left side pipe distribution cavity and the right side pipe distribution cavity;
when the pressure relief valve A is pressed to be opened, the left fresh air return air duct and the right fresh air return air duct are respectively communicated with the left cloth pipe cavity and the right cloth pipe cavity, and when the pressure relief valve B is pressed to be opened, the left pressure relief closed cavity and the right pressure relief closed cavity are respectively communicated with the left cloth pipe cavity and the right cloth pipe cavity.
The left air-out circulation closed air duct and the right air-out circulation closed air duct are formed by combining a plurality of closed air ducts, and each closed air duct is internally provided with at least one air outlet.
And air-conditioning air outlet sealing blocks are arranged at the butt joint of the air inlet of the left air-out circulation closed air duct and the left air outlet of the air-conditioning system and the butt joint of the air inlet of the right air-out circulation closed air duct and the right air outlet, and the butt joints are sealed.
The outer top piece is provided with a detachable air conditioner box cover which is arranged above the air conditioning system.
An openable skylight is arranged on the outer top piece to communicate the cab with the outside air.
The invention has the beneficial effects that:
1. the outer top forms an independent inner and outer circulating air duct and an air outlet air duct. Other air channels are not fixed between the upper piece and the lower piece of the outer top; because the outer top forms an independent air duct, the number of parts can be reduced, and the cost is reduced.
2. The multipath pressure relief valves arranged on the upper closing member and the lower closing member on the outer top realize the instant pressure relief function of the closed cab, and solve the problem of difficult closing of the closed cab.
Drawings
FIG. 1 is a schematic view of the combined structure of the present invention;
FIG. 2 is a schematic view of an interior trim top of the present invention;
FIG. 3 is a schematic structural view of the composite structure of the present invention after being turned over;
FIG. 4 is a schematic view of the construction of the outer top piece of the present invention;
FIG. 5 is a schematic view of the construction of the outer top lower member of the present invention;
FIG. 6 is a schematic view of the inverted top lower member of the present invention;
FIG. 7 is a schematic view of the outer roof of the present invention with the outer roof upper member removed;
FIG. 8 is a schematic view of the outer top piece and outer bottom piece bonding glue and forming air channels of the present invention;
FIG. 9 is a schematic side view of the pressure relief concept of the present invention;
fig. 10 is a schematic front view of the pressure relief principle of the present invention.
Detailed Description
The present invention is further illustrated by the following examples.
Referring to fig. 1, 2 and 3, an external roof of a cab with an independent air-conditioning duct and a pressure relief function includes: the outer roof upper and lower assembly 2, the air conditioning system 3 in the cab, the cab framework 5 and the inner roof assembly 6.
The cab framework 5 is provided with a bracket connected with the outer top upper and lower combined piece 2. The outer top upper and lower assembly 2 is screwed on the cab framework 5. All parts of an air conditioning system 3 in the cab are fixed on the outer top upper closing piece 2 and the outer bottom closing piece 2. The interior trim top fitting 6 is connected to the cab framework 5 through an interior trim buckle top.
As shown in figure 3, the rear end of the fresh air grille 7 is inserted into the left side and the right side of the outer top upper and lower combined piece 2, and is fixed on the outer top upper and lower combined piece 2 by a fresh air grille installation hand wheel 8. The hot air pipe sealing O-shaped ring 9, the sealing partition plate 10, the sealing partition plate 11 and the air-conditioning refrigeration pipe sealing O-shaped ring 12 are sealing parts between the air-conditioning system 3 in the cab and the outer top upper and lower combined part 2. The hot air pipe sealing O-shaped ring 9 and the sealing partition plate 10 are positioned at the left front part of the outer top upper closing member 2, and the sealing partition plate 11 and the air-conditioning refrigeration pipe sealing O-shaped ring 12 are positioned at the right front part of the outer top upper closing member 2.
As shown in fig. 1, the detachable air conditioner case cover 1 arranged above the air conditioning system is arranged on the outer top piece, the air conditioner case cover 1 is an access cover for accessing an air conditioner evaporator 3.1 on the outer top, and simultaneously, when the air conditioner case cover is screwed with the outer top upper and lower assembly piece 2 through bolts, the air conditioner air outlet sealing block 3.4 is pressed tightly, so that the air conditioner air outlet is sealed.
As shown in figure 1, the outer top piece is provided with an openable skylight 4, so that the cab is communicated with the outside air, the front end of the skylight 4 is connected with the outer top upper and lower combined piece 2 through a hinge, and the rear end can be opened and locked by a window support.
The outer top lower assembly 2 is formed by bonding and screwing an outer top upper piece 2.1 (see fig. 4) and an outer top lower piece 2.2 (see fig. 5). An air conditioning system installation cavity G is formed between the outer top upper part 2.1 and the outer top lower part 2.2, a left fresh air return air duct, a right fresh air return air duct, a left fresh air closed cavity X ', a right fresh air closed cavity X, a left air outlet circulating closed air duct, a right air outlet circulating closed air duct, a left pressure relief closed cavity Z' and a right pressure relief closed cavity Z, the inner surface of the outer top upper part 2.1 is positioned on the upper surface of the air outlet air duct of the air conditioner and is bonded with a sound-insulation and heat-insulation material 2.1.1, nuts are embedded in the A part (bilateral symmetry) of the outer top upper part 2.1, and the B part is a mark part for gluing.
The left air-out circulation closed air duct and the right air-out circulation closed air duct are formed by combining a plurality of closed air ducts, and each closed air duct is internally provided with at least one air outlet. As shown in fig. 5, the left side air-out circulation closed air duct can be set as air ducts D and E, and the right side air-out circulation closed air duct can be set as air ducts D 'and E'.
The fresh air filter element and the grille installation position of the outer top lower piece 2.2 are provided with two openings H and I (as shown in figure 6). The left side and the right side of the lower part of the outer top lower piece 2.2 are respectively provided with 5 air outlets F which are respectively positioned in the left side air-out circulation closed air duct and the right side air-out circulation closed air duct, and the air outlets F are in one-to-one correspondence with the air-conditioner air-out balls 6.3 (5 on the left and the right) on the inner decoration top piece 6 (as shown in figure 2). The upper rear part of the outer top lower piece 2.2 is provided with four posts G1, G2, G3 and G4 for fixing the air conditioner evaporator.
The outer top lower part 2.2 (see fig. 5) is composed of a lower part 2.2.1, a right fresh air return air duct cover plate 2.2.2, a special screw 2.2.3 for plastics, two pressure release valves A2.2.4, two pressure release valves B2.2.6 and a left fresh air return air duct cover plate 2.2.5.
The A 'position (shown in figure 5) of the lower piece 2.2.1 is provided with connecting columns which are respectively in one-to-one correspondence with the embedded nuts (shown in figure 4) at the A position of the external top upper piece 2.1, and the B' position (shown in figure 5) of the lower piece 2.2.1 is also matched with the B position (shown in figure 4) of the external top upper piece 2.1. The lower piece 2.2.1 is provided with a left air outlet at the C position, the left side of an air conditioning evaporator of an air conditioning system is provided with two air outlet channels D and E, the air outlet channel E is provided with two air outlets and is positioned at the left side of the rear part of the interior trim top piece 6, and the air outlet channel D is provided with three air outlets and is positioned at the left side of the front part of the interior trim top piece 6; similarly, the air outlet at the right side of the air conditioner evaporator is arranged at the position C ', two air outlet channels D ' and E ' are formed on the right side of the air outlet, two air outlets are formed in the E ' air channel and are positioned at the right side of the rear part of the interior trim top assembly 6, and three air outlets are formed in the D ' air channel and are positioned at the right side of the front part of the interior trim top assembly 6. The right fresh air return duct cover plate 2.2.2 and the left fresh air return duct cover plate 2.2.5 are respectively bonded on the right side and the left side of the rear part of the lower part 2.2.1 and are screwed by special screws 2.2.3 for plastics. Two relief valves A2.2.4 are located left new trend return air wind channel apron, right new trend return air wind channel apron respectively, and two relief valves B2.2.6 are located outer top lower part 2.2 left middle part, outer top lower part 2.2 right middle part respectively on, and every relief valve is fixed through two special screws for plastics.
The outer top upper and lower assembly 2 is formed by bonding and screwing the outer top upper piece 2.1 and the outer top lower piece 2.2. During bonding, the glue-coated part B of the outer top upper part 2.1 is bonded with the part B' in the lower part 2.2.1 of the outer top lower part 2.2. Meanwhile, the A position of the external top piece 2.1 is in one-to-one correspondence with the connecting columns at the A' position of the lower piece 2.2.1 and is in compression connection through screws.
The air conditioning system 3 in the cab comprises (see fig. 7) an air conditioning evaporator 3.1, an air conditioning refrigeration pipe 3.2, a warm air pipe 3.3 and an air conditioning outlet sealing block 3.4 (one on the left and right). The air conditioner evaporator 3.1 is fixed on 4 posts G1, G2, G3 and G4 of the outer top upper and lower combined piece 2 through 4 special plastic screws (as shown in figure 5), and the air conditioner refrigerating pipe 3.2 and the air heating pipe 3.3 are connected to corresponding pipes of the air conditioner evaporator 3.1 and clamped by clips. The air-conditioning outlet sealing blocks 3.4 (one on each of the left and right) are respectively positioned above the left and right air outlets of the air conditioner. The air conditioning refrigeration pipe 3.2 is provided with a sealing partition plate 11 (see figures 3 and 7) at the position L of the outer top lower combined piece 2, and an air conditioning refrigeration pipe sealing O-shaped ring 12 is arranged at the joint of the sealing plate 11 and the air conditioning refrigeration pipe 3.2. The warm air pipe 3.3 is provided with a sealing clapboard 10 (shown in figures 3 and 7) at the position N of the upper and lower combined pieces 2 at the outer top, and a warm air pipe sealing O-shaped ring 9 is arranged at the joint of the sealing clapboard 10 and the warm air pipe 3.3.
When the evaporator 3.1 of the air conditioning system 3 in the cab is fixed on the 4 posts G1, G2, G3 and G4 of the outer top lower piece 2.2 through 4 special plastic screws, the part of the evaporator 3.1 combined with the outer top lower piece 2.2 is provided with sealing materials, and the evaporator 3.1 is pressed on the outer top lower piece 2.2 through the sealing materials by the screws, so that the evaporator and the outer top lower piece 2.2 form a closed air conditioning system installation cavity G.
The interior trim top assembly 6 comprises (see fig. 2) a return air filter element 6.1, a return air grille 6.2 and air-conditioning outlet air balls 6.3 (5 on the left and the right). The return air grille 6.2 consists of two parts, the back part is provided with a return air filter element 6.1, the return air filter elements 6.1 at the left side and the right side correspond to the P, P' position (shown in figure 5) of the outer top lower piece 2.2, and are compressed tightly by a sealing gasket. The interior trim top piece 6 and the exterior top lower piece 2.2 are attached together, and a left side pipe distribution cavity and a right side pipe distribution cavity for arranging pipelines of the air conditioning system are respectively enclosed on two sides. The left cloth tube cavity and the right cloth tube cavity are communicated with a cab, and pressure release valves B2.2.6 are arranged in the left cloth tube cavity and the right cloth tube cavity.
The right fresh air return air duct cover plate 2.2.2 and the left fresh air return air duct cover plate 2.2.5 of the outer top lower part 2.2 are respectively bonded and screwed with the right rear part and the left rear part of the lower part 2.2.1, so that two cavities at the rear part of the outer top lower part are formed, the two cavities are a left fresh air return air duct and a right fresh air return air duct, and the two cavities are communicated with the air conditioning system installation cavity G.
The fresh air filter element and the grid of the outer top lower part 2.2 are provided with two openings H and I which are communicated with the outside of the cab, wherein the opening H and the corresponding fresh air return air channel cover plate are communicated with the left fresh air return air channel and the right fresh air return air channel formed by the lower part 2.2.1.
The cab framework 5 not only bears the outer roof, but also two front upright posts of the cab framework are channels leading to the outside of the cab through an air-conditioning refrigeration pipe 3.2 and a warm air pipe 3.3.
To sum up, the structure of the top of the air conditioner will be described below based on the principle of forming the independent air duct for internal and external circulation of the air conditioning system, the principle of forming the air outlet duct of the air conditioning system, and the principle of the pressure relief function.
1. The principle of forming the internal and external circulation independent air duct of the air conditioning system is as follows:
the independent air duct of inside and outside circulation (as shown in figure 5) is formed by a left fresh air return air duct cover plate 2.2.2 and a left fresh air return air duct cover plate 2.2.5 which are respectively bonded and screwed with the right rear part and the left rear part of the lower piece 2.2.1, a right fresh air return air duct and an air conditioning system installation cavity G area below an air conditioning evaporator, and the independent air duct of inside and outside circulation is communicated with an air conditioning blower and is simultaneously communicated with H ports at two sides and P, P' ports at the bottom rear parts of two sides (as shown in figure 6) of the outer top lower piece 2.2.
The outer top upper and lower combined piece 2 is firstly bonded by an outer top piece 2.1 (shown in figure 4) and an outer top lower piece 2.2 (shown in figure 5), glue is coated on the outer top piece 2.1 during bonding, a glue coating mark (shown in figure 8 glue coating schematic diagram) is designed on the outer top piece 2.1, nuts are pre-embedded at the A part (bilateral symmetry) of the outer top piece 2.1, after the two pieces are bonded, the two pieces are screwed and tensioned by using special screws, so that 6 closed cavities are formed inside the outer top upper and lower combined piece 2 and respectively comprise a left fresh air closed cavity, a right fresh air closed cavity, a left air outlet circulation closed air duct (air ducts D and E) and a right air outlet circulation closed air duct (air ducts D 'and E').
The left, right X and X' cavities at the rear parts of the two sides are cavities when external circulation fresh air enters, and are communicated with the left fresh air return air duct and the right fresh air return air duct through an H port (see figure 6). The left side and the right side of the rear part of the outer top upper and lower assembly 2 are respectively provided with a fresh air grille 7, the fresh air grille 7 consists of two parts X1 and X2 (see figure 3), a fresh air filter element is arranged on the outer part X1, the fresh air filter element is communicated with the fresh air filter element of the outer top lower assembly 2.2 and an opening H (see figure 6) at the mounting position of the grille, and fresh air passing through the fresh air filter element enters the left fresh air return air duct and the right fresh air return air duct from the opening H. The inner portion X2 of the fresh air grille 7, which is free of filter elements, communicates directly with the opening I (see fig. 6) of the outer top lower part 2.2. Rectangular openings P and P' (see figure 6) are respectively arranged below the outer top lower piece which is just opposite to the lower part of the right fresh air return air channel cover plate 2.2.2 and the left fresh air return air channel cover plate 2.2.5, and the two rectangular openings are air return openings of the air conditioner internal circulation. The peripheries of the two rectangular openings are adhered with sealing materials. The left side and the right side of the rear part of the inner decoration top assembly 6 (shown in figure 2) are respectively provided with an air return grille 6.2, the air return grille 6.2 also consists of two parts of grilles, the larger grille at the rear part is provided with an air return filter element 6.1, the left air return filter element 6.1 and the right air return filter element are tightly pressed on the rectangular openings P and P 'of the left fresh air return air duct and the right fresh air return air duct of the outer top assembly through sealing materials at the peripheries of the rectangular openings P and P', and the return air passing through the air return filter element enters the fresh air return air duct through the opening P. The front opening of the air return grille 6.2 is smaller, the opening is not provided with a filter element, and the opening is directly communicated with a left cloth pipe cavity and a right cloth pipe cavity between the inner decoration top and the outer top.
The left fresh air return duct cover plate 2.2.5 and the right fresh air return duct cover plate 2.2.2 are respectively provided with a pressure release valve A2.2.4 (as shown in figure 5), the pressure release valves 2.2.4A are similar to rubber sheets of one-way valves, and the pressure release valves can be opened only under the impact of pressure, so that the pressure release valves are tightly closed without pressure impact, and leakage cannot be caused. And the outer top lower piece 2.2 above the left cloth pipe cavity and the right cloth pipe cavity is respectively provided with a pressure release valve B2.2.6 which is also positioned in the left pressure release closed cavity Z' and the right pressure release closed cavity Z.
2. Air-out wind channel of air conditioning system forms the principle:
the 6 closed cavities formed in the outer top upper and lower assembly 2 are 4 cavities D, E, D ' and E ' besides the cavities X and X ', and the four cavities form the left and right air outlet channels of the air conditioning system. D. The cavity E forms a left air outlet duct, and the cavities D 'and E' form a right air outlet duct. After the air conditioner evaporator is installed and fixed on the upper and lower assembly parts 2 on the outer top, the left and right air outlets of the air conditioner evaporator are respectively communicated with the left and right air outlet channels, and air conditioner air outlet sealing blocks 7 (one for each of the left and right air outlets) (see figure 1) are tightly pressed by an air conditioner box cover 1 to ensure the sealing of the air outlets. The air outlet ball 6.3 of the air conditioner is arranged at the air ball opening of the inner decorative top 6 (shown in figure 2) and is pressed by the sealing gasket adhered at the air ball opening of the outer top, thereby ensuring the sealing of the air outlet. The front 2 of the left and right wind balls F1, F2, F1 'and F2' are defrosting wind balls, and the other 3 of the left and right wind balls are air-conditioning blowing wind balls, wherein the total 6 of the left and right wind balls are 5 wind balls.
The Y and Y' (see fig. 8) regions defined by the outer top and bottom assemblies 2 are in communication with the left and right front a pillars of the cab framework 5 (see fig. 3), i.e., the two regions are in direct communication with the outside of the cab. The air-conditioning refrigeration pipe 3.2 comes out of the right side of the evaporator, passes through a pipe distribution cavity on the right side of a square hole at the K position and reaches the L position, a sealing partition plate 11 (shown in figure 3) is arranged at the L position, the lower part of a sealing plate 11 is inserted into a clamping groove of an outer top lower piece 2.2, the upper part of the sealing plate is pressed into the square hole at the L position, an air-conditioning refrigeration pipe sealing O-shaped ring 12 is arranged at the joint of the sealing plate 11 and the air-conditioning refrigeration pipe 3.2 at the square hole position, and the air-conditioning refrigeration pipe 3.2 enters a front right A column of a cab framework 5 through the L position (shown in figure 7); similarly, the warm air pipe 3.3 comes out from the right side of the evaporator, firstly winds to the rear part of the evaporator from the right side of the evaporator and then arrives at the left side of the evaporator, and goes to the N position through a pipe distribution cavity at the left side of a square hole at the M position, a sealing partition plate 10 is arranged at the N position, the lower part of the sealing plate 10 is inserted into a clamping groove of an outer jacking lower piece, the upper part of the sealing plate is pressed into the square hole at the N position, a warm air pipe sealing O-shaped ring 9 is arranged at the joint of the sealing plate 10 and the warm air pipe 3.3 at the square hole, and the warm air pipe 3.3 enters a front left A column of the cab framework 5 through the N position. Since the sealing partition plate 10, the sealing partition plate 11, the air-conditioning refrigeration pipe sealing O-ring 12 and the warm air pipe sealing O-ring 9 are completely sealed at the L position and the N position (see figure 7), the Y and Y' areas are communicated with the outside of the cab, and the sealing of each air duct of the air-conditioning system and the sealing of the cab are not influenced.
The areas Z and Z' (see fig. 8) formed by the external top and bottom combined piece 2 are isolated from all air ducts, and are only communicated with the corresponding left and right ports I (see fig. 6), which are communicated with the inner side of the fresh air grille 7 (see fig. 3) without a filter element, that is, the two cavities are communicated with the outside of the cab, a pressure relief valve B2.2.6 (see fig. 5) is respectively arranged on the two cavities, the pressure relief valve B2.2.6 is similar to a rubber sheet of a one-way valve and can be opened only under the impact of pressure, so that the pressure relief valve is tightly closed without causing leakage under the impact of pressure, and the sealing of the cab is not influenced although the two cavities are communicated with the outside of the cab.
The other area of the outer roof upper and lower assembly 2 (see fig. 8) constitutes a cavity between the cab outer roof upper and lower assembly 2 and the interior roof assembly 6, which cavity is used for arranging air conditioning pipes, warm air pipes and wiring harnesses. Because the air conditioner case cover 1 is tightly pressed by the sealing gasket when being fixed on the outer top up and down assembly 2 through the bolt, the cavity is only communicated with the inside of the cab and is not communicated with the outside of the cab.
3. Principle of pressure release function:
the external roof structure of the invention is used on a closed cab, and the closed cab must be a positive pressure cab. When the air in the cab is not exhausted in time when the door of the positive pressure cab is opened and the door needs to be closed, the door of the vehicle is difficult to close, and in order to solve the problem of difficult door closing, the pressure relief structure is designed on the outer top.
The principle of the pressure relief structure is shown schematically in fig. 9 and 10, wherein Q1 and Q2 are the channel directions of the air in the cab to be exhausted to the outside at the moment of closing the door. Wherein Q1 is the indoor air exhaust path through which the return air filter element does not pass, and Q2 is the indoor air exhaust path through which the return air filter element passes.
The indoor air exhaust channel without passing through the return air filter element enters into a left side pipe distribution cavity and a right side pipe distribution cavity which are formed between an upper and a lower combined member 2 of an outer top of a cab and an inner top combined member 6 from front small-area grilles at two sides of the inner top of the cab (see figures 1 and 9), the left side pipe distribution cavity and the right side pipe distribution cavity (cavities for arranging air conditioning cooling pipes, warm air pipes and wire harnesses) are directly communicated with the cab, the left side and the right side of the upper and the lower combined member 2 of the outer top are respectively provided with a pressure release valve B2.2.6 arranged in the left side pipe distribution cavity and the right side pipe distribution cavity at the left and the right, under the impact of instantaneous pressure, the air entering into the left side pipe distribution cavity and the right side pipe distribution cavity enters into Z and Z '(see figures 8 and 10) areas formed by the upper and the lower combined member 2 of the outer top through the pressure release valves B2.2.6, and the Z' areas are only communicated with corresponding left and right I openings (see figures 6 and 10), the I port is communicated with the part without the filter element at the inner side of the fresh air grille 7 (shown in figure 3), so that the air is discharged from the grids without the filter elements of the fresh air filter elements 8 at the two sides through the I ports at the left side and the right side, and the functions of exhausting and relieving pressure are completed. The opened pressure release valve B2.2.6 is only opened instantly under the pressure impact, and is automatically closed when no pressure exists, so that the sealing performance of the cab is ensured.
The indoor air exhaust channel passing through the return air filter element enters the fresh air return air channel at the two sides of the outer top upper and lower combined piece 2 from the large-area grids at the rear part of the return air grids 6.2 (see figures 1 and 9) at the two sides of the cab top, the pressure relief valves A2.2.4 (such as figures 5, 9 and 10) on the left fresh air return air channel cover plate 2.2.5 and the right fresh air return air channel cover plate 2.2.2 are instantaneously opened under the impact of instantaneous pressure, the air entering the fresh air return air channel also enters the cavity between the outer top upper and lower combined piece 2 and the inner top combined piece 6 through the pressure relief valves A2.2.4, and then the direction of air exhaust is the same as the direction of the indoor air exhaust channel not passing through the return air filter element, thereby completing the pressure relief function.
Claims (5)
1. The utility model provides a driver's cabin top outward that independent wind channel of self-forming air conditioner and possess pressure release function which characterized in that: comprises an outer top upper closing piece, an outer top lower closing piece, an air conditioning system, an inner decoration top closing piece and a cab framework;
the outer top upper and lower combined piece is fixedly arranged on the cab framework and is formed by bonding and screwing the outer top upper piece and the outer top lower piece;
an air conditioning system installation cavity, a left fresh air return air duct, a right fresh air return air duct, a left fresh air closed cavity, a right fresh air closed cavity, a left air outlet circulation closed air duct, a right air outlet circulation closed air duct, a left pressure relief closed cavity and a right pressure relief closed cavity are formed between the outer top upper part and the outer top lower part; the outer top lower piece is provided with an H port and an I port which are communicated with the outside of the cab;
the air conditioning system installation cavity is used for installing an air conditioning system, a blower of the air conditioning system is respectively communicated with the left fresh air return air duct and the right fresh air return air duct, the left fresh air return air duct and the right fresh air return air duct are respectively provided with a port P and a port P' which are communicated with a cab, and pressure release valves A are arranged in the left fresh air return air duct and the right fresh air return air duct;
the left fresh air closed cavity is communicated with the left fresh air return air duct and the H port on the corresponding side, and the right fresh air closed cavity and the right fresh air return air duct are communicated with the H port on the corresponding side;
the left air outlet of the air inlet air conditioning system of the left air-out circulation closed air duct is correspondingly arranged, the air inlet of the right air-out circulation closed air duct is respectively correspondingly arranged with the right air outlet of the air conditioning system, and the left air-out circulation closed air duct and the right air-out circulation closed air duct are both provided with air outlets communicated with the cab;
the left pressure relief closed cavity and the right pressure relief closed cavity are respectively communicated with the I port on the corresponding side, and the left pressure relief closed cavity and the right pressure relief closed cavity are respectively provided with a pressure relief valve B;
an inner decoration top piece fixed on a cab framework is further installed below the outer top upper and lower piece, a left side pipe distribution cavity and a right side pipe distribution cavity for arranging air conditioning system pipelines are respectively defined by the inner decoration top piece and two sides of the outer top lower piece, the left side pipe distribution cavity and the right side pipe distribution cavity are communicated with a cab, and a pressure release valve A and a pressure release valve B are arranged in the left side pipe distribution cavity and the right side pipe distribution cavity;
when the pressure relief valve A is pressed to be opened, the left fresh air return air duct and the right fresh air return air duct are respectively communicated with the left cloth pipe cavity and the right cloth pipe cavity, and when the pressure relief valve B is pressed to be opened, the left pressure relief closed cavity and the right pressure relief closed cavity are respectively communicated with the left cloth pipe cavity and the right cloth pipe cavity.
2. The cab roof of claim 1, which is an independent air duct of a self-forming air conditioner and has a pressure relief function, wherein: the left air-out circulation closed air duct and the right air-out circulation closed air duct are formed by combining a plurality of closed air ducts, and each closed air duct is internally provided with at least one air outlet.
3. The cab roof of claim 1, which is an independent air duct of a self-forming air conditioner and has a pressure relief function, wherein: and air-conditioning air outlet sealing blocks are arranged at the butt joint of the air inlet of the left air-out circulation closed air duct and the left air outlet of the air-conditioning system and the butt joint of the air inlet of the right air-out circulation closed air duct and the right air outlet, and the butt joints are sealed.
4. The cab roof of claim 1, which is an independent air duct of a self-forming air conditioner and has a pressure relief function, wherein: the outer top piece is provided with a detachable air conditioner box cover which is arranged above the air conditioning system.
5. The cab roof of claim 1, which is an independent air duct of a self-forming air conditioner and has a pressure relief function, wherein: an openable skylight is arranged on the outer top piece to communicate the cab with the outside air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210000923.1A CN114348122B (en) | 2022-01-04 | 2022-01-04 | Driver's cabin outer roof with independent air duct of self-forming air conditioner and pressure relief function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210000923.1A CN114348122B (en) | 2022-01-04 | 2022-01-04 | Driver's cabin outer roof with independent air duct of self-forming air conditioner and pressure relief function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114348122A true CN114348122A (en) | 2022-04-15 |
| CN114348122B CN114348122B (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210000923.1A Active CN114348122B (en) | 2022-01-04 | 2022-01-04 | Driver's cabin outer roof with independent air duct of self-forming air conditioner and pressure relief function |
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| Country | Link |
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| CN (1) | CN114348122B (en) |
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| CN1522918A (en) * | 2003-01-29 | 2004-08-25 | Two piece vehicle roof structure having an integrated hvac system | |
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| KR20170115067A (en) * | 2015-05-27 | 2017-10-16 | 얀마 가부시키가이샤 | Working car |
| CN210555202U (en) * | 2019-07-29 | 2020-05-19 | 江苏常发农业装备股份有限公司 | Spliced cab ceiling |
| CN214065362U (en) * | 2020-10-30 | 2021-08-27 | 山推工程机械股份有限公司 | Evaporator assembly and air conditioner |
| CN214492453U (en) * | 2020-12-17 | 2021-10-26 | 江苏沃得农业机械股份有限公司 | Built-in air conditioner structure applied to corn harvester |
| CN215042007U (en) * | 2021-05-24 | 2021-12-07 | 一拖（洛阳）福莱格车身有限公司 | Tractor cab ceiling structure |
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2022
- 2022-01-04 CN CN202210000923.1A patent/CN114348122B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1522918A (en) * | 2003-01-29 | 2004-08-25 | Two piece vehicle roof structure having an integrated hvac system | |
| CN203996123U (en) * | 2014-08-23 | 2014-12-10 | 福田雷沃国际重工股份有限公司 | The air channel structure of tractor cab top cover |
| KR20170115067A (en) * | 2015-05-27 | 2017-10-16 | 얀마 가부시키가이샤 | Working car |
| US20180134115A1 (en) * | 2015-05-27 | 2018-05-17 | Yanmar Co., Ltd. | Work vehicle |
| CN210555202U (en) * | 2019-07-29 | 2020-05-19 | 江苏常发农业装备股份有限公司 | Spliced cab ceiling |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114348122B (en) | 2022-10-25 |
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