Air convection structure and system for cockpit and excavator

Abstract

The utility model relates to an air convection structure and system for a cockpit and an excavator and system. The air convection structure comprises a first air inlet unit, a first filtering unit, an air outlet unit, an adjusting unit, a second air inlet unit, a three-way unit and a control unit. The first air inlet unit is arranged on the outer side of the cab cabin; the first filtering unit is arranged at the first end of the first air inlet unit; an air outlet unit and a first air inlet unit; the adjusting unit is arranged at the end of the air outlet unit and communicated with the cab cabin. The second air inlet unit is communicated with the interior of the cab cabin; the three-way unit is respectively communicated with the second end of the second air inlet unit, an engine air filter and the outside; the control unit is connected with the three-way unit. The cab ventilation device has the advantages that a closed air circulation environment is formed by the cab cabin, the first air inlet unit, the second air inlet unit and the engine, the cab cabin is ventilated through the negative pressure of the engine, and the problems that cab ventilation equipment is high in energy consumption, low in ventilation efficiency and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of cabin ventilation, and in particular to an air convection structure and system for a cockpit and an excavator. Background Art

[0002] The existing cab ventilation methods mainly include: installing an electric fan in the cab, which is simple and easy to operate. The electric fan forces the air in the cab to flow, which makes the driver feel comfortable at first, but because the air stays in the closed and narrow room for a long time, the heat emitted by the human body cannot be taken out, and the driver will feel uncomfortable after working for a long time. At the same time, its operation is driven by a battery or a generator, so it consumes part of the engine energy; installing an air conditioner in the cab, the air conditioner can reduce the temperature in the cab, but the temperature difference between indoor and outdoor is large, and the human body needs an adaptation process. In addition, the air conditioner consumes a lot of power, generally around 3kW. If the engine power reserve is insufficient, it will have a certain impact on the performance of the excavator. It should be pointed out that most of the air conditioners installed on excavators are currently automotive air conditioners. Since the working conditions of the excavator's work site are worse than those of cars. And the air conditioning device on the excavator is directly rigidly connected to the frame, and the excavator is much more bumpy and vibrating than the car, so the air conditioning pipes on the excavator are easy to loosen and leak. In addition, the engine speed of the excavator fluctuates greatly during operation, and the cab seal is not as good as that of the car, which results in poor reliability of the air conditioner, easy leakage of fluorine, and shortened service life. In addition, the leakage of the working medium of the air conditioner, Freon, will also cause environmental problems. Although there are fluorine-free air conditioners now, the heat exchange efficiency of their working medium is lower than that of Freon, and the economic efficiency is also slightly worse, which needs further improvement.

[0003] Currently, no effective solution has been proposed for the problems of high energy consumption and low air exchange efficiency of cab ventilation equipment in related technologies. Utility Model Content

[0004] The purpose of the utility model is to provide an air convection structure, system and excavator for a cab in view of the deficiencies in the prior art, so as to solve the problems of high energy consumption and low air exchange efficiency of cab ventilation equipment existing in the related art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] In a first aspect, an air convection structure for a cockpit is provided, comprising:

[0007] A first air intake unit, wherein the first air intake unit is arranged outside the cab body;

[0008] a first filter unit, the first filter unit being disposed at the first air inlet unit and being detachably connected to the first air inlet unit, and being used for filtering air entering the first air inlet unit;

[0009] An air outlet unit, the air outlet unit is arranged inside the cabin of the cab, and the air outlet unit is communicated with the first air inlet unit and the cabin of the cab respectively;

[0010] A regulating unit, the regulating unit is arranged at the gas outlet end of the gas outlet unit and is used to adjust the outflow direction of the gas;

[0011] a second air intake unit, the second air intake unit being arranged outside the cab body and communicating with the interior of the cab body;

[0012] A three-way unit, wherein a first end of the three-way unit is connected to the second air intake unit, a second end of the three-way unit is connected to the engine air filter, and a third end of the three-way unit is connected to the outside;

[0013] A control unit, which is arranged inside the cab body and connected to the three-way unit, and is used to control the working state of the three-way unit;

[0014] The air convection structure has three working states:

[0015] When the air convection structure is in the first working state, the first end and the second end of the three-way unit are opened, and the third end of the three-way unit is closed;

[0016] When the air convection structure is in the second working state, the second end and the third end of the three-way unit are opened, and the first end of the three-way unit is closed;

[0017] When the air convection structure is in the third working state, the first end, the second end and the third end of the three-way unit are open.

[0018] In some embodiments, the first air intake unit includes:

[0019] A first air intake element, which is disposed outside the cab body and connected to the air outlet unit;

[0020] A first connecting element is disposed on the first air inlet element and is detachably connected to the first filter unit.

[0021] In some embodiments, the first filtering unit comprises:

[0022] a first filter element, the first filter element being disposed in the first air intake unit and configured to filter air entering the first air intake unit;

[0023] A second connecting element is disposed on the first filter element and is detachably connected to the first air intake unit.

[0024] In some embodiments, the gas outlet unit includes:

[0025] A first air outlet component, the first air outlet component is arranged inside the cabin body of the cab, and the air outlet unit is respectively connected with the first air inlet unit and the cabin body;

[0026] A third connecting element is disposed on the first air outlet element and connected to the regulating unit.

[0027] In some embodiments, the adjusting unit includes:

[0028] An adjusting element, wherein the adjusting element is movably arranged at an air outlet end of the air outlet unit;

[0029] a second gas outlet element, which is disposed on the regulating element and communicated with the gas outlet unit, and is used to adjust the outflow direction of the gas under the action of the regulating element;

[0030] The second filter element is arranged at the second air outlet element and is used to prevent foreign matter from entering the second air outlet element.

[0031] In some embodiments, the second air intake unit includes:

[0032] The second air intake element is arranged on the outside of the cab body and is connected to the three-way unit and is communicated with the three-way unit and the inside of the cab body respectively.

[0033] In some embodiments, the three-way unit includes:

[0034] A base element, the base element being arranged outside the cab body;

[0035] a first connecting element, the first connecting element being disposed on the base element and connected to the second air inlet unit;

[0036] a second communication element, the second communication element being disposed on the base element and being in communication with the engine air filter;

[0037] A third communication element, the third communication element is arranged on the base element and communicated with the outside;

[0038] A switch element is arranged inside the base element and connected to the control unit, and is used to control the connection and closing of the first connecting element, the second connecting element, and the third connecting element.

[0039] In some of the embodiments, it also includes:

[0040] The second filter unit is arranged at the second air intake unit and is used for filtering the gas flowing out from the cab body.

[0041] In some of the embodiments, it also includes:

[0042] A third filter unit is disposed at the third end of the three-way unit and is used for filtering the air entering the three-way unit.

[0043] In a second aspect, an air convection system for a cockpit is provided, comprising:

[0044] Cab cabin;

[0045] The air convection structure as described in the first aspect, wherein the air convection structure is arranged on the cabin body;

[0046] An engine air filter is arranged outside the cab body and is communicated with the three-way unit of the air convection structure.

[0047] In a third aspect, an excavator is provided, comprising:

[0048] The air convection structure as described in the first aspect; or

[0049] An air convection system as described in the second aspect.

[0050] The utility model adopts the above technical solution, and compared with the prior art, has the following technical effects:

[0051] The utility model discloses an air convection structure, system and excavator for a cab, which form a closed gas circulation environment by connecting a cab body with a first air intake unit, a second air intake unit and an engine, and control the gas entry channel through a three-way unit, and utilize the negative pressure of the engine to ventilate the cab body, thereby solving the problems of high energy consumption and low air exchange efficiency of the cab ventilation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a schematic diagram of an air convection structure according to an embodiment of the utility model (I);

[0053] Figure 2 is a schematic diagram of a first air intake unit according to an embodiment of the utility model;

[0054] Figure 3 is a schematic diagram of a first filter unit according to an embodiment of the utility model;

[0055] Figure 4 is a schematic diagram of an air outlet unit according to an embodiment of the utility model;

[0056] Figure 5 is a schematic diagram of an adjustment unit according to an embodiment of the utility model;

[0057] Figure 6 is a schematic diagram of a second air intake unit according to an embodiment of the utility model;

[0058] Figure 7 is a schematic diagram of a three-way unit according to an embodiment of the utility model;

[0059] Figure 8 is a schematic diagram of an air convection structure according to an embodiment of the utility model (II);

[0060] Fig. 9 Schematic diagram of the air convection structure according to the embodiment of the utility model (III);

[0061] Fig.10 It is a schematic diagram of an air convection system according to an embodiment of the utility model.

[0062] The reference numerals are: 100, cab body; 200, air convection structure; 300, engine air filter;

[0063] 210. First air intake unit; 211. First air intake element; 212. First connecting element;

[0064] 220, first filter unit; 221, first filter element; 222, second connecting element;

[0065] 230, air outlet unit; 231, first air outlet element; 232, third connecting element;

[0066] 240, regulating unit; 241, regulating element; 242, second air outlet element; 243, second filter element;

[0067] 250, second air intake unit; 251, second air intake element;

[0068] 260, three-way unit; 261, base element; 262, first connecting element; 263, second connecting element; 264, third connecting element; 265, switch element;

[0069] 270. Control unit;

[0070] 280, second filter unit;

[0071] 290. The third filter unit. DETAILED DESCRIPTION

[0072] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0073] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0074] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0075] Example 1

[0076] This embodiment relates to the air convection structure of the utility model.

[0077] An illustrative embodiment of the present utility model is as follows: Figure 1 As shown, an air convection structure 200 for a cockpit includes a first air intake unit 210, a first filter unit 220, an air outlet unit 230, a regulating unit 240, a second air intake unit 250, a three-way unit 260 and a control unit 270. The first air intake unit 210 is arranged on the outside of the cab cabin; the first filter unit 220 is arranged on the first air intake unit 210 and is detachably connected to the first air intake unit 210, and is used to filter the air entering the first air intake unit 210; the air outlet unit 230 is arranged on the inside of the cab cabin, and the air outlet unit 230 is communicated with the first air intake unit 210 and the cab cabin respectively; the regulating unit 240 is arranged on the air outlet end of the air outlet unit 230, and is used to adjust the outflow direction of the gas; the second air intake unit 250 is arranged on the outside of the cab cabin, and is communicated with the inside of the cab cabin; the first end of the three-way unit 260 is communicated with the second air intake unit 250, and the second end of the three-way unit 260 is communicated with the emission unit 270. The engine air filter is connected, and the third end of the three-way unit 260 is connected to the outside world; the control unit 270 is arranged inside the cab cabin and connected to the three-way unit 260, and is used to control the working state of the three-way unit 260; the air convection structure 200 has three working states: when the air convection structure 200 is in the first working state, the first end and the second end of the three-way unit 260 are opened, and the third end of the three-way unit 260 is closed; when the air convection structure 200 is in the second working state, the second end and the third end of the three-way unit 260 are opened, and the first end of the three-way unit 260 is closed; when the air convection structure 200 is in the third working state, the first end, the second end, and the third end of the three-way unit 260 are opened.

[0078] In some of the embodiments, the control unit 270 includes but is not limited to controlling a motor.

[0079] like Figure 2 As shown, the first air intake unit 210 includes a first air intake element 211 and a first connecting element 212. The first air intake element 211 is arranged outside the cab body and connected to the air outlet unit 230; the first connecting element 212 is arranged on the first air intake element 211 and is detachably connected to the first filter unit 220.

[0080] In some of the embodiments, the first air intake element 211 is detachably connected to the cab body, such as by bolts.

[0081] In some of the embodiments, the first air inlet element 211 is sealed to the cabin body of the cab, such as by providing a sealing gasket or a sealing ring.

[0082] In some of the embodiments, the cross-section of the first air inlet element 211 is circular, rectangular, etc.

[0083] In some of the embodiments, the first air inlet component 211 includes but is not limited to a first air inlet duct.

[0084] The first connecting element 212 is disposed at an end portion and / or inside of the first air inlet element 211 .

[0085] In some embodiments, the first connecting element 212 and the first air inlet element 211 are integrally formed.

[0086] In some of the embodiments, the first connecting element 212 includes but is not limited to a threaded connector and a clamping member, such as an internal thread, an external thread, a clamping groove, and a clamping block.

[0087] When the first connecting element 212 is disposed at the end of the first air intake element 211, the first connecting element 212 includes but is not limited to a threaded connector and a snap-on connector; when the first connecting element 212 is disposed inside the first air intake element 211, the first connecting element 212 includes but is not limited to a snap-on connector.

[0088] like Figure 3 As shown, the first filter unit 220 includes a first filter element 221 and a second connecting element 222. The first filter element 221 is disposed on the first air inlet unit 210 to filter the air entering the first air inlet unit 210; the second connecting element 222 is disposed on the first filter element 221 and is detachably connected to the first air inlet unit 210.

[0089] Specifically, the first filter element 221 is disposed on the first air inlet element 211 ; the second connecting element 222 is detachably connected to the first connecting element 212 .

[0090] The first filter element 221 is disposed at the air inlet end and / or inside of the first air inlet element 211 .

[0091] In some of the embodiments, the cross-section of the first filter element 221 is circular, rectangular, etc.

[0092] In some embodiments, the first filter element 221 includes a first frame and a first filter element, wherein the first frame is provided with a second connecting element 222; and the first filter element is provided inside the first frame.

[0093] In some of the embodiments, the first filter element 221 includes but is not limited to a filter, an activated carbon filter, a HEPA filter, and the like.

[0094] The second connecting element 222 is disposed at an end and / or a side of the first frame.

[0095] In some embodiments, the connection method between the second connection element 222 and the first connection element 212 includes but is not limited to threaded connection and clamping.

[0096] In some of the embodiments, the second connecting element 222 includes but is not limited to a threaded connector and a clamping member, such as an internal thread, an external thread, a clamping groove, and a clamping block.

[0097] When the second connecting element 222 is disposed at the end of the first frame, the second connecting element 222 includes but is not limited to a threaded connector and a clamping member; when the second connecting element 222 is disposed at the side of the first frame, the second connecting element 222 includes but is not limited to a clamping member.

[0098] like Figure 4 As shown, the air outlet unit 230 includes a first air outlet component 231 and a third connecting component 232. The first air outlet component 231 is disposed inside the cab body, and the air outlet unit 230 is connected to the first air inlet unit 210 and the cab body respectively; the third connecting component 232 is disposed on the first air outlet component 231 and connected to the regulating unit 240.

[0099] Specifically, the first air outlet element 231 is disposed at the second end of the first air inlet element 211 and is communicated with the first air inlet element 211 .

[0100] In some embodiments, the connection method between the first gas outlet component 231 and the first gas inlet component 211 includes but is not limited to welding and threaded connection.

[0101] In some of the embodiments, the cross section of the first gas outlet element 231 is rectangular.

[0102] In some embodiments, the longitudinal section of the first air outlet element 231 is in a broken line shape. Specifically, one end of the first air outlet element 231 close to the first air inlet element 211 is horizontally arranged, and the other end is arranged at an obtuse angle to the first end.

[0103] In some of the embodiments, the first air outlet element 231 is an air outlet duct.

[0104] The third connecting element 232 is disposed through a bottom surface of an end portion of the first gas outlet element 231 away from the first gas inlet element 211 .

[0105] In some embodiments, the cross section of the third connecting element 232 is circular.

[0106] In some of the embodiments, the third connecting element 232 is a mounting hole.

[0107] like Figure 5 As shown, the regulating unit 240 includes a regulating element 241, a second gas outlet element 242 and a second filter element 243. The regulating element 241 is movably arranged at the gas outlet end of the gas outlet unit 230; the second gas outlet element 242 is arranged at the regulating element 241 and communicated with the gas outlet unit 230, and is used to adjust the outflow direction of the gas under the action of the regulating element 241; the second filter element 243 is arranged at the second gas outlet element 242, and is used to prevent foreign matter from entering the second gas outlet element 242.

[0108] Specifically, the second air outlet element 242 is disposed at the air outlet end of the first air outlet element 231 and is communicated with the first air outlet element 231 ; the regulating element 241 is movably connected to the third connecting element 232 .

[0109] In some of the embodiments, the cross section of the second gas outlet element 242 is circular.

[0110] In some embodiments, the second air outlet element 242 includes but is not limited to a spherical air outlet.

[0111] In some of the embodiments, the adjusting element 241 is rotatably connected to the first gas outlet element 231 .

[0112] In some of the embodiments, the regulating element 241 and the second gas outlet element 242 are integrally formed.

[0113] In some embodiments, the longitudinal section of the regulating element 241 is T-shaped. Specifically, the regulating element 241 includes a stopper and a rotation member. The stopper is located inside the first gas outlet element 231 and is position-limitedly connected to the third connecting element 232; the rotation member is disposed at the bottom of the stopper and is rotationally connected to the third connecting element 232, and the other end of the rotation member is connected and communicated with the second gas outlet element 242.

[0114] The size of the stopper matches the size of the third connecting element 232. Generally, the outer diameter of the stopper is larger than the radial dimension of the third connecting element 232.

[0115] In some of the embodiments, the cross-section of the limiting member is circular.

[0116] The size of the rotating member matches the size of the third connecting element 232. Generally, the outer diameter of the rotating member is equal to the outer diameter of the third connecting element 232.

[0117] The size of the rotating member matches the size of the limiting member. Generally, the inner diameter of the rotating member is equal to the inner diameter of the limiting member.

[0118] In some of the embodiments, the cross section of the rotating member is annular.

[0119] In some of the embodiments, the adjusting element 241 is a rotating connecting tube.

[0120] In some embodiments, the connection method between the second filter element 243 and the second air outlet element 242 includes but is not limited to clamping and bonding.

[0121] In some of the embodiments, the second filter element 243 includes but is not limited to a filter screen and the like.

[0122] like Figure 6 As shown, the second air intake unit 250 includes a second air intake element 251. The second air intake element 251 is disposed outside the cab body, connected to the three-way unit 260, and communicated with the three-way unit 260 and the interior of the cab body, respectively.

[0123] In some of the embodiments, the cross-section of the second air inlet element 251 is circular, rectangular, etc.

[0124] In some of the embodiments, the second air inlet component 251 is a second air inlet duct.

[0125] like Figure 7 As shown, the three-way unit 260 includes a base element 261, a first connecting element 262, a second connecting element 263, a third connecting element 264 and a switch element 265. The base element 261 is arranged outside the cab body; the first connecting element 262 is arranged on the base element 261 and is connected to the second air intake unit 250; the second connecting element 263 is arranged on the base element 261 and is connected to the engine air filter; the third connecting element 264 is arranged on the base element 261 and is connected to the outside; the switch element 265 is arranged inside the base element 261 and is connected to the control unit 270, and is used to control the connection and closing of the first connecting element 262, the second connecting element 263, and the third connecting element 264.

[0126] Specifically, the first communication element 262 is in communication with the second intake element 251 .

[0127] In some embodiments, the longitudinal section of the base element 261 is T-shaped. Specifically, the base element 261 includes a first base, a second base and a third base. The first base is vertically arranged, the first end of the first base is rotatably connected to the switch element 265, and the second end of the first base is provided with a second connecting element 263; the second base is horizontally arranged on the first side of the first base and is connected to the first base, and the second end of the second base is provided with a first connecting element 262; the third base is horizontally arranged on the second end of the first base and is connected to the first base, and the second end of the third base is provided with a third connecting element 264.

[0128] In some of the embodiments, the base element 261 is a three-way valve seat.

[0129] In some of the embodiments, the first connecting element 262 and the base element 261 are integrally formed.

[0130] In some embodiments, the first communication element 262 is sealedly connected to the second air inlet element 251 .

[0131] In some embodiments, the cross section of the first communication element 262 is circular.

[0132] In some embodiments, the first communication element 262 is a first communication hole.

[0133] In some of the embodiments, the second connecting element 263 and the base element 261 are integrally formed.

[0134] In some embodiments, the cross section of the second connecting element 263 is circular.

[0135] In some embodiments, the second connecting element 263 is a second connecting hole.

[0136] In some of the embodiments, the cross-section of the third communication element 264 is circular.

[0137] In some of the embodiments, the third connecting element 264 is integrally formed with the base element 261 .

[0138] In some of the embodiments, the third communication element 264 is a third communication hole.

[0139] The switch element 265 is electrically connected to the control unit 270 .

[0140] The size of the switch element 265 matches the size of the base element 261. Generally, the radial size of the switch element 265 is equal to the inner diameter of the first base, and the radial size of the switch element 265 is greater than the radial size of the second base (third base).

[0141] In some of the embodiments, the cross section of the switch element 265 is in an arc shape.

[0142] In some of the embodiments, the switch element 265 is an arc valve.

[0143] The method of using the utility model is as follows:

[0144] (I) First working state

[0145] The control unit 270 is operated to control the switch element 265 to close the third connecting element 264. At this time, the first connecting element 262 and the second connecting element 263 are connected to each other, that is, the engine air filter and the cabin body are connected to each other;

[0146] When the engine is running, negative pressure is formed in the cab cabin, so that the outside air enters the cab cabin through the first filter element 221 and the first air intake element 211 in sequence, and then enters the engine air filter through the second air intake element 251, so as to achieve the purpose of ventilating the cab cabin.

[0147] (II) Second working state

[0148] When the cab body does not need to be ventilated, the control unit 270 is operated to control the switch element 265 to close the first connecting element 262. At this time, the second connecting element 263 and the third connecting element 264 are connected to each other, that is, the engine air filter is directly connected to the outside world.

[0149] When the engine is running, air directly enters the engine air filter through the three-way unit 260.

[0150] (III) The third working state

[0151] When the air intake of the cab body needs to be adjusted, the control unit 270 is operated to adjust the switch element 265 so that the switch element 265 is located between the first connecting element 262 and the third connecting element 264. At this time, the first connecting element 262, the second connecting element 263, and the third connecting element 264 are interconnected, that is, the engine air filter, the cab body, and the outside are interconnected;

[0152] When the engine is running, the outside air enters the engine air filter from the first air intake element 211 and the third connecting element 264 according to the size of the resistance, so as to achieve the purpose of ventilating the cabin.

[0153] The advantage of the utility model is that a closed gas circulation environment is formed by connecting the cab body with the first air intake unit, the second air intake unit and the engine, and the channel for gas entry is controlled by a three-way unit, and the negative pressure of the engine is used to ventilate the cab body, thereby solving the problems of high energy consumption and low air exchange efficiency of the cab ventilation equipment.

[0154] Example 2

[0155] This embodiment is a supplementary embodiment of Embodiment 1.

[0156] like Figure 8 As shown, the air convection structure 200 further includes a second filter unit 280. The second filter unit 280 is disposed on the second air intake unit 250 and is used to filter the air flowing out of the cabin.

[0157] Furthermore, the second air intake unit 250 further includes a fourth connecting element, wherein the fourth connecting element is disposed at the end and / or inside of the second air intake element 251 and is detachably connected to the second filter unit 280 .

[0158] In some of the embodiments, the fourth connecting element and the second air inlet element 251 are integrally formed.

[0159] In some of the embodiments, the fourth connecting element includes but is not limited to a threaded connector and a clamping member, such as an internal thread, an external thread, a clamping groove, and a clamping block.

[0160] When the fourth connecting element is disposed at the end of the second air intake element 251, the fourth connecting element includes but is not limited to a threaded connector and a snap-on connector; when the fourth connecting element is disposed inside the second air intake element 251, the fourth connecting element includes but is not limited to a snap-on connector.

[0161] The second filter unit 280 includes a third filter element and a fifth connecting element. The third filter element is disposed on the second air inlet unit 250 to filter the air entering the second air inlet unit 250; the fifth connecting element is disposed on the third filter element and is detachably connected to the second air inlet unit 250.

[0162] Specifically, the third filter element is disposed on the second air inlet element 251; and the fifth connecting element is detachably connected to the fourth connecting element.

[0163] The third filter element is disposed at the air inlet end and / or inside of the second air inlet element 251 .

[0164] In some of the embodiments, the cross-section of the third filter element is circular, rectangular, etc.

[0165] In some embodiments, the third filter element includes a second frame and a second filter element, wherein the second frame is provided with a fifth connecting element; and the second filter element is provided inside the second frame.

[0166] In some of the embodiments, the third filter element includes but is not limited to a filter, an activated carbon filter, a HEPA filter, and the like.

[0167] The fifth connecting element is disposed at an end portion and / or a side portion of the second frame body.

[0168] In some embodiments, the connection method between the fifth connecting element and the fourth connecting element includes but is not limited to threaded connection and clamping.

[0169] In some of the embodiments, the fifth connecting element includes but is not limited to a threaded connector, a clamping member, such as an internal thread, an external thread, a clamping groove, and a clamping block.

[0170] When the fifth connecting element is disposed at the end of the second frame, the fifth connecting element includes but is not limited to a threaded connector and a clamping member; when the fifth connecting element is disposed at the side of the second frame, the fifth connecting element includes but is not limited to a clamping member.

[0171] The advantage of this embodiment is that, by providing the second filter unit, it is possible to prevent debris in the cab body from entering the second air intake unit.

[0172] Example 3

[0173] This embodiment is a supplementary embodiment of Embodiments 1 and 2.

[0174] like Fig. 9 As shown, the air convection structure 200 further includes a third filter unit 290. The third filter unit 290 is disposed at one end of the three-way unit 260 communicating with the outside, and is used to filter the air entering the three-way unit 260.

[0175] Furthermore, the three-way unit 260 further includes a sixth connecting element, wherein the sixth connecting element is disposed at the end and / or inside of the third connecting element 264 and is detachably connected to the third filter unit 290 .

[0176] In some of the embodiments, the sixth connecting element and the third connecting element 264 are integrally formed.

[0177] In some of the embodiments, the sixth connecting element includes but is not limited to a threaded connector and a clamping member, such as an internal thread, an external thread, a clamping groove, and a clamping block.

[0178] When the sixth connecting element is disposed at the end of the third connecting element 264, the sixth connecting element includes but is not limited to a threaded connector and a snap-in connector; when the sixth connecting element is disposed inside the third connecting element 264, the sixth connecting element includes but is not limited to a snap-in connector.

[0179] The third filter unit 290 includes a fourth filter element and a seventh connection element. The fourth filter element is disposed on the three-way unit 260 to filter the air entering the three-way unit 260; the seventh connection element is disposed on the fourth filter element and is detachably connected to the three-way unit 260.

[0180] Specifically, the fourth filter element is disposed on the third connecting element 264; the seventh connecting element is detachably connected to the sixth connecting element.

[0181] The fourth filter element is disposed at the air inlet end and / or inside of the third connecting element 264 .

[0182] In some of the embodiments, the cross-section of the fourth filter element is circular, rectangular, etc.

[0183] In some embodiments, the fourth filter element includes a third frame and a third filter element, wherein the third frame is provided with a seventh connecting element; and the third filter element is provided inside the fourth frame.

[0184] In some of the embodiments, the fourth filter element includes but is not limited to a filter, an activated carbon filter, a HEPA filter, etc.

[0185] The seventh connecting element is disposed at an end and / or a side of the third frame.

[0186] In some of the embodiments, the connection method between the seventh connection element and the sixth connection element includes but is not limited to threaded connection and clamping.

[0187] In some of the embodiments, the seventh connecting element includes but is not limited to a threaded connector and a clamping member, such as an internal thread, an external thread, a clamping groove, and a clamping block.

[0188] When the seventh connecting element is arranged at the end of the third frame, the seventh connecting element includes but is not limited to a threaded connector and a clamping member; when the seventh connecting element is arranged at the side of the third frame, the seventh connecting element includes but is not limited to a clamping member.

[0189] The advantage of this embodiment is that, by providing the third filter unit, foreign matter in the external air can be prevented from entering the three-way unit.

[0190] Example 4

[0191] This embodiment relates to the air convection system of the utility model.

[0192] like Fig.10 As shown, an air convection system for a cockpit includes a cab body 100, an air convection structure 200 as described in any one of Embodiments 1 to 3, and an engine air filter 300. The first air intake unit 210 and the second air intake unit 250 of the air convection structure 200 are respectively arranged on the outside of the cab body 100 and communicated with the inside of the cab body 100; the engine air filter 300 is arranged on the outside of the cab body 100 and communicated with the three-way unit 260 of the air convection structure 200.

[0193] Specifically, the engine air filter 300 is in communication with the second communication element 263 .

[0194] Example 5

[0195] This embodiment relates to the excavator of the utility model.

[0196] An excavator includes the air convection structure 200 as described in Examples 1 to 3, or the air convection system as described in Example 4.

[0197] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An air convection structure for a cockpit, characterized in that: include: A first air intake unit, wherein the first air intake unit is arranged outside the cab body; a first filter unit, the first filter unit being disposed at the first air inlet unit and being detachably connected to the first air inlet unit, and being used for filtering air entering the first air inlet unit; An air outlet unit, the air outlet unit is arranged inside the cabin of the cab, and the air outlet unit is communicated with the first air inlet unit and the cabin of the cab respectively; A regulating unit, the regulating unit is arranged at the gas outlet end of the gas outlet unit and is used to adjust the outflow direction of the gas; a second air intake unit, the second air intake unit being arranged outside the cab body and communicating with the interior of the cab body; A three-way unit, wherein a first end of the three-way unit is connected to the second air intake unit, a second end of the three-way unit is connected to the engine air filter, and a third end of the three-way unit is connected to the outside; A control unit, which is arranged inside the cab body and connected to the three-way unit, and is used to control the working state of the three-way unit; The air convection structure has three working states: When the air convection structure is in the first working state, the first end and the second end of the three-way unit are opened, and the third end of the three-way unit is closed; When the air convection structure is in the second working state, the second end and the third end of the three-way unit are opened, and the first end of the three-way unit is closed; When the air convection structure is in the third working state, the first end, the second end and the third end of the three-way unit are open.

2. The air convection structure according to claim 1, characterized in that: The first air intake unit comprises: A first air intake element, which is disposed outside the cab body and connected to the air outlet unit; A first connecting element is disposed on the first air inlet element and is detachably connected to the first filter unit.

3. The air convection structure according to claim 1, characterized in that: The first filtering unit comprises: a first filter element, the first filter element being disposed in the first air intake unit and configured to filter air entering the first air intake unit; A second connecting element is disposed on the first filter element and is detachably connected to the first air intake unit.

4. The air convection structure according to claim 1, characterized in that: The gas outlet unit comprises: A first air outlet component, the first air outlet component is arranged inside the cabin body of the cab, and the air outlet unit is respectively connected with the first air inlet unit and the cabin body; A third connecting element is disposed on the first air outlet element and connected to the regulating unit.

5. The air convection structure according to claim 1, characterized in that: The adjustment unit comprises: An adjusting element, wherein the adjusting element is movably arranged at an air outlet end of the air outlet unit; a second gas outlet element, which is disposed on the regulating element and communicated with the gas outlet unit, and is used to adjust the outflow direction of the gas under the action of the regulating element; The second filter element is arranged at the second air outlet element and is used to prevent foreign matter from entering the second air outlet element.

6. The air convection structure according to claim 1, characterized in that: The second air intake unit comprises: The second air intake component is arranged on the outside of the cab body and is communicated with the three-way unit and the inside of the cab body respectively.

7. The air convection structure according to claim 1, characterized in that: The three-way unit comprises: A base element, the base element being arranged outside the cab body; a first connecting element, the first connecting element being disposed on the base element and connected to the second air inlet unit; a second communication element, the second communication element being disposed on the base element and being in communication with the engine air filter; A third communication element, the third communication element is arranged on the base element and communicated with the outside; A switch element is arranged inside the base element and connected to the control unit, and is used to control the connection and closing of the first connecting element, the second connecting element, and the third connecting element.

8. The air convection structure according to any one of claims 1 to 7, characterized in that: Also includes: a second filter unit, the second filter unit being disposed at the second air intake unit and configured to filter the gas flowing out of the cabin; and / or A third filter unit is disposed at the third end of the three-way unit and is used for filtering the air entering the three-way unit.

9. An air convection system for a cockpit, characterized in that: include: Cab cabin; The air convection structure according to any one of claims 1 to 8, wherein the air convection structure is arranged on the cabin body; An engine air filter is arranged outside the cab body and is communicated with the three-way unit of the air convection structure.

10. An excavator, characterized in that: include: The air convection structure according to any one of claims 1 to 8; Or the air convection system as claimed in claim 9.

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