Air conditioning device special for positive pressure cab of agricultural machine

Abstract

The utility model relates to the technical field of agricultural machinery, in particular to an air conditioning device special for an agricultural machinery positive pressure cab, which comprises an outer ceiling matched above the agricultural machinery cab, an inner ceiling is arranged below the outer ceiling, and an inner circulation air inlet is arranged on one side of the inner ceiling. An air conditioner assembly and an air blower are arranged on one side of the outer ceiling, outer circulation air inlets are formed in the two outer sides of the outer ceiling, and a shell cavity is formed outside the air blower. The monitoring mechanism comprises a temperature sensor and a pressure sensor and is used for monitoring the temperature and air pressure in the agricultural machine cab; the air door adjusting mechanisms are arranged on the two symmetrical sides in the shell cavity and used for conducting internal and external circulation air inlet switching in the agricultural machine cab. According to the air pressure and temperature change in the agricultural machine cab, air inlet switching of internal and external circulation is achieved, the use requirement of the positive pressure cab is met, and the problem that in the prior art, comfort is poor in the working process of a driver is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of agricultural machinery, in particular to a special air-conditioning device for a positive-pressure cab of an agricultural machinery. Background Art

[0002] Agricultural machinery is mostly self-propelled power machines used to tow and drive operating machinery to complete various mobile operations. They play an irreplaceable role in modern agricultural production. The existing agricultural machinery cabs have a simple structure and mostly adopt internal circulation ventilation to ensure better dust prevention in agricultural production. However, the only internal circulation ventilation will cause the driver to feel stuffy and unbearable during the summer production process, which is not conducive to the driver's health.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention, and do not constitute an admission that the above contents are the closest prior art. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings and provide a special air conditioning device for a positive pressure cab of an agricultural machinery.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: an air conditioning device dedicated to a positive pressure cab of an agricultural machinery, comprising an outer ceiling arranged above the cab of the agricultural machinery and having a skylight, an inner ceiling with a preset ventilation cavity arranged below the outer ceiling, an inner circulation air inlet for communicating with the interior of the cab of the agricultural machinery arranged on one side of the inner ceiling, an air conditioning assembly for introducing air into the cab of the agricultural machinery arranged on one side of the outer ceiling corresponding to the inner circulation air inlet, a blower designed in series arranged on one side of the air conditioning assembly, outer circulation air inlets for introducing external air arranged on both sides of the outer ceiling, and a shell cavity arranged outside the blower and in the mounting groove of the air conditioning assembly;

[0006] The monitoring mechanism includes a temperature sensor and a pressure sensor arranged in the shell cavity and penetrating the interior of the agricultural machinery driving cab, and is used to monitor the temperature and air pressure inside the agricultural machinery driving cab;

[0007] The air door adjustment mechanism is arranged on two symmetrical sides in the shell cavity, and is used for switching the internal and external circulation air intake inside the agricultural machinery cab.

[0008] Furthermore, the monitoring mechanism also includes a controller arranged at a corner end of the shell cavity, and the controller is used to receive detection signals from the temperature sensor and the pressure sensor and issue a control signal after performing logical judgment.

[0009] Furthermore, internal circulation air inlet channels connected to the internal circulation air inlet are arranged on both symmetrical sides of the shell cavity, and an external circulation air inlet channel is arranged on a corresponding side of the internal circulation air inlet channel and perpendicular to the bottom surface of the shell cavity.

[0010] Furthermore, the external circulation air inlet channel is communicated with the external circulation air inlets which are opened through the two sides of the outer ceiling.

[0011] Furthermore, the damper adjustment mechanism includes damper baffles that are arranged horizontally and vertically on the inner circulation air inlet channel and the outer circulation air inlet channel, and a connecting rod arranged on the inner end surface of the damper baffle. A sleeve is arranged on the end of the connecting rod away from the damper baffle, and a rotating shaft driven by a servo motor is arranged on the central axis of the sleeve.

[0012] Furthermore, the servo motor is electrically connected to the controller.

[0013] Furthermore, an inspection cover is provided on the outer ceiling at the top of the installation slot corresponding to the air conditioning assembly.

[0014] Furthermore, the air conditioning assembly is provided with six tubular air outlet cavities, and the air outlets of the air outlet cavities are connected to the agricultural machinery cab.

[0015] Furthermore, the damper baffle can completely block the air inlet opening of the inner circulation air inlet channel or the outer circulation air inlet channel.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the utility model can realize the switching of internal and external circulation air intakes in the agricultural machinery cab in real time according to the changes in the internal air pressure and temperature of the agricultural machinery cab through the provision of a monitoring mechanism and a damper adjustment mechanism, as well as a controller included in the monitoring mechanism and electrically connected to the servo motor, so as to meet the use requirements of the positive pressure cab, ensure the good working state of the driver, prevent harmful gases and dust from directly entering the agricultural machinery cab, establish an effective external circulation air intake system, ensure that the air pressure in the agricultural machinery cab is higher than the external atmospheric pressure, and solve the problem of poor comfort of the driver during work in the prior art; and also through the external circulation air inlet provided on the outer ceiling, an air intake system connected to the external air is added to the agricultural machinery cab, so as to maintain the pressurization process inside the agricultural machinery cab for a period of time, and solve the problem of internal air pressure drop caused by the current internal circulation air intake system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0018] Figure 1 A three-dimensional structural diagram of an embodiment of the utility model from a single perspective;

[0019] Figure 2 A three-dimensional structural diagram of another perspective of an embodiment of the utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the interior of one side of the outer ceiling of an embodiment of the utility model;

[0021] Figure 4 A three-dimensional structural diagram of a shell cavity of an embodiment of the present utility model from one viewing angle;

[0022] Figure 5 A three-dimensional structural diagram of the relevant structure on the shell cavity of one embodiment of the utility model from another perspective;

[0023] Figure 6 This is a frontal partial cross-sectional plan view of the relevant structure on the shell cavity of one embodiment of the utility model.

[0024] In the figure: 1. outer ceiling; 2. inner ceiling; 3. internal circulation air inlet; 4. air conditioning assembly; 41. blower; 42. air outlet chamber; 5. shell cavity; 51. internal circulation air inlet channel; 52. external circulation air inlet channel; 61. temperature sensor; 62. pressure sensor; 63. controller; 7. damper adjustment mechanism; 71. damper baffle; 72. connecting rod; 73. sleeve; 74. rotating shaft; 741. servo motor; 8. external circulation air inlet; 9. inspection cover. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or schemes that satisfy both A and B. In addition, "multiple" refers to more than two. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0028] like Figure 1-6 As shown, the utility model is a special air conditioning device for a positive pressure cab of an agricultural machinery, comprising an outer ceiling 1 which is arranged above the cab of the agricultural machinery and has a skylight, an inner ceiling 2 with a preset ventilation cavity is arranged below the outer ceiling 1, an inner circulation air inlet 3 for communicating with the interior of the cab of the agricultural machinery is arranged on one side of the inner ceiling 2, an air conditioning assembly 4 for introducing air into the cab of the agricultural machinery is arranged on one side of the outer ceiling 1 corresponding to the inner circulation air inlet 3, a blower 41 designed in series is arranged on one side of the air conditioning assembly 4, external circulation air inlets 8 for introducing external air are arranged on both sides of the outer ceiling 1, and a shell cavity 5 is arranged outside the blower 41 and in the mounting groove of the air conditioning assembly 4;

[0029] The monitoring mechanism includes a temperature sensor 61 and a pressure sensor 62 arranged in the shell cavity 5 and penetrating the interior of the agricultural machine driving cab, and is used to monitor the temperature and air pressure inside the agricultural machine driving cab;

[0030] The air door adjustment mechanism 7 is arranged on both sides symmetrically in the shell cavity 5, and is used to switch the air intake of the internal and external circulation in the agricultural machinery cab. With this design, the outer ceiling 1 and the inner ceiling 2 are fixedly assembled by bolts above the agricultural machinery cab, and the air conditioning assembly 4, the blower 41, the shell cavity 5 and the monitoring mechanism and the air door adjustment mechanism 7 installed in the shell cavity 5 are installed in the groove opened by turning on one side of the outer ceiling 1. It is possible to monitor the air pressure and temperature inside the agricultural machinery cab in real time, and after completing the logical judgment based on the monitoring results, the air door adjustment mechanism 7 is selected to switch the air intake of the internal and external circulation in the agricultural machinery cab, so as to meet the use requirements of the positive pressure agricultural machinery cab, prevent harmful gases and dust from directly entering the agricultural machinery cab, and ensure that the air pressure in the agricultural machinery cab is higher than the external atmospheric pressure.

[0031] It should be noted that the air conditioning assembly 4 includes but is not limited to an evaporator, a compressor, a condenser, a filter, a throttling device and a radiator.

[0032] It should be noted that the monitoring probes of the temperature sensor 61 and the pressure sensor 62 penetrate and extend to be placed on the top surface of the inner cavity of the agricultural machinery driving cab.

[0033] In one embodiment, the monitoring mechanism further includes a controller 63 disposed at a corner end of the shell cavity 5, and the controller 63 is used to receive detection signals from the temperature sensor 61 and the pressure sensor 62 and send out control signals after performing logical judgment. With such a design, the controller 63 is fixed by bolts at a corner end of the shell cavity 5, and the controller 63 is electrically connected to the temperature sensor 61 and the pressure sensor 62. The internal air pressure and temperature of the agricultural machinery cab of this embodiment are maintained at 5-50Pa and 23-26°C, respectively. When the monitoring probe of the pressure sensor 62 inside the agricultural machinery cab detects changes in the internal air pressure, it will send a signal to the controller 63 for logical judgment. When the monitoring probe of the temperature sensor 61 inside the agricultural machinery cab detects changes in temperature, it will also send a signal to the controller 63 for logical judgment.

[0034] It should be noted that the safety range of temperature is set to 23-26° C. and the safety range of air pressure is set to 5-50 Pa on the controller 63 .

[0035] In one embodiment, the shell cavity 5 is provided with inner circulation air inlet channels 51 connected to the inner circulation air inlet port 3 on both symmetrical sides, and an outer circulation air inlet channel 52 is provided on the corresponding side of the inner circulation air inlet channel 51 and perpendicular to the bottom surface of the shell cavity 5. With this design, the inner circulation air inlet channel 51 and the outer circulation air inlet channel 52 are welded on both symmetrical sides of the shell cavity 5, and the corresponding horizontal planes on the inner circulation air inlet channel 51 and the outer circulation air inlet channel 52 intersect vertically, so that the overall structure of the outer ceiling 1 and the inner ceiling 2 assembled above the agricultural machinery cab can perform normal inner and outer circulation air intake operations.

[0036] In one embodiment, the outer circulation air inlet channel 52 is connected to the outer circulation air inlet 8 which is opened on both sides of the outer ceiling 1. With this design, the outer port of the inner circulation air inlet channel 51 is connected to the outer circulation air inlet 8, so that the outside air can be transported to the agricultural machinery driving room through the blower 41, and the fresh air is introduced into the outer circulation to maintain air circulation. After a period of pressurization, the agricultural machinery driving room is in a positive pressure state, which prevents harmful gases and dust from directly entering the agricultural machinery driving room, and ensures that the air pressure in the agricultural machinery driving room is higher than the outside atmospheric pressure.

[0037] In one embodiment, the damper adjustment mechanism 7 includes a damper baffle 71 that is horizontally and vertically intersected on the inner circulation air inlet channel 51 and the outer circulation air inlet channel 52, and a connecting rod 72 that is arranged on the inner end surface of the damper baffle 71. A sleeve 73 is arranged on the end of the connecting rod 72 away from the damper baffle 71, and a rotating shaft 74 driven by a servo motor 741 is arranged on the central axis of the sleeve 73. In this design, the one-piece damper baffle 71, connecting rod 72 and sleeve 73 and the rotating shaft 74 sleeved on the inner ring of the sleeve 73 are longitudinally installed at the intersection of the horizontal and vertical intersections on the inner circulation air inlet channel 51 and the outer circulation air inlet channel 52, and the servo motor 741 connected to the coupling on the rotating shaft 74 is started to drive the rotating shaft 74 to rotate, so that the sleeve 73 fixed on the rotating shaft 74 and the damper baffle 71 integrally formed outside the sleeve 73 are switched to block the air inlet of the inner circulation air inlet channel 51 or the outer circulation air inlet channel 52 to meet the subsequent internal and external circulation air inlet switching operation, and the use effect is good.

[0038] It should be noted that the damper baffle 71 is an arc-shaped structural plate, and the inner end surfaces of the inner circulation air inlet channel 51 and the outer circulation air inlet channel 52 are designed to fit the outer arc surface of the damper baffle 71 .

[0039] In one embodiment, the servo motor 741 is electrically connected to the controller 63. In this design, the controller 63 receives the temperature and air pressure signals and then sends a control signal to start the servo motor 741, thereby blocking the opening of the inner circulation air inlet channel 51 or the outer circulation air inlet channel 52 through the damper adjustment mechanism 7.

[0040] It should be noted that when the monitoring probe on the pressure sensor 62 installed inside the agricultural machinery cab detects that the internal air pressure is between 5Pa and 50Pa, it will send a signal to the controller 63, and then send a control signal to start the servo motor 741, driving the damper baffle 71 to approach and block the external circulation air inlet channel 52, so that the interior of the agricultural machinery cab is in an internal circulation state. When the air pressure inside the agricultural machinery cab is monitored to be less than 5Pa and greater than 50Pa, a control signal is also sent through the controller 63 to start the servo motor 741, driving the damper baffle 71 to approach the internal circulation air inlet channel 51, blocking the air inlet port of the internal circulation air inlet channel 51, and performing external circulation air intake through the external circulation air inlet channel 52 and the external air under the action of the air-conditioning assembly 4 and the blower 41 designed in series on the air-conditioning assembly 4, ensuring that the air pressure inside the agricultural machinery cab is within a safe range.

[0041] It should be noted that when the monitoring probe on the temperature sensor 61 installed inside the agricultural machinery cab detects that the internal temperature is between 23°C and 26°C, it will send a signal to the controller 63, and then send a control signal to start the servo motor 741, blocking the external circulation air inlet channel 52, so that the agricultural machinery cab is in a good internal circulation air inlet state. When the temperature is monitored to be less than 23°C or greater than 26°C, it will send a signal to the controller 63, and then send a control signal to start the servo motor 741, and the internal circulation air inlet channel 51 will be blocked by the rotation of the air damper 71, so as to establish a circulation connection with the external air, thereby ensuring a good external circulation air inlet state inside the agricultural machinery cab.

[0042] It should be noted that when changes in air pressure and temperature are monitored in the cab of agricultural machinery and different air inlet channels need to be opened, the internal and external circulation states need to be switched based on temperature changes.

[0043] In one embodiment, an inspection cover 9 is provided on the top of the mounting slot corresponding to the air conditioner assembly 4 on the outer ceiling 1. With this design, the inspection cover 9 connected by a hinge installed on the top of the outer ceiling 1 can be flipped open to perform regular inspection and maintenance on the internal structure of the outer ceiling 1.

[0044] In one embodiment, six tubular air outlet cavities 42 are provided on the air conditioning assembly 4, and the air outlet of the air outlet cavities 42 is connected to the agricultural machinery cab. With this design, air can be introduced into the agricultural machinery cab through the six tubular air outlet cavities 42 welded at the ends of the shell of the air conditioning assembly 4, regardless of whether the air is inhaled through external circulation or internal circulation.

[0045] In one embodiment, the damper baffle 71 can completely block the air inlet opening of the inner circulation air inlet channel 51 or the outer circulation air inlet channel 52. With this design, the damper baffle 71 is driven to rotate by starting the servo motor 741, and selective switching and blocking are performed at the air inlet opening of the inner circulation air inlet channel 51 or the outer circulation air inlet channel 52, thereby realizing the air inlet switching operation of the inner circulation and the outer circulation.

[0046] It should be noted that by fixing the rotational position of the damper baffle 71, half of the internal circulation air inlet passage 51 and half of the external circulation air inlet passage 52 can be blocked, and the internal circulation and external circulation air inlet operations can be performed simultaneously.

[0047] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A special air conditioning device for a positive pressure driving cab of an agricultural machinery, comprising an outer ceiling (1) arranged above the driving cab of the agricultural machinery and having a skylight, an inner ceiling (2) with a preset ventilation cavity is arranged below the outer ceiling (1), an inner circulation air inlet (3) for communicating with the interior of the driving cab of the agricultural machinery is arranged on one side of the inner ceiling (2), an air conditioning assembly (4) for introducing air into the driving cab of the agricultural machinery is arranged on one side of the outer ceiling (1) corresponding to the inner circulation air inlet (3), and a blower (41) of a series design is arranged on one side of the air conditioning assembly (4), characterized in that: External circulation air inlets (8) for introducing external air are arranged on both sides of the outer ceiling (1), and a shell cavity (5) is arranged outside the blower (41) and in the installation groove of the air conditioning assembly (4); The monitoring mechanism comprises a temperature sensor (61) and a pressure sensor (62) which are arranged in the shell cavity (5) and penetrate the interior of the agricultural machine driving cab, and are used to monitor the temperature and air pressure inside the agricultural machine driving cab; The air door adjustment mechanism (7) is arranged on two symmetrical sides in the shell cavity (5) and is used for switching the internal and external circulation air intakes in the agricultural machinery cab.

2. The special air conditioning device for positive pressure cab of agricultural machinery according to claim 1, characterized in that: The monitoring mechanism further comprises a controller (63) arranged at a corner end of the shell cavity (5), and the controller (63) is used to receive detection signals from the temperature sensor (61) and the pressure sensor (62) and issue a control signal after performing a logical judgment.

3. The special air conditioning device for positive pressure cab of agricultural machinery according to claim 2, characterized in that: Internal circulation air inlet channels (51) communicating with the internal circulation air inlet port (3) are provided on both symmetrical sides of the shell cavity (5), and an external circulation air inlet channel (52) is provided on a corresponding side of the internal circulation air inlet channel (51) and perpendicular to the bottom surface of the shell cavity (5).

4. The special air conditioning device for positive pressure cab of agricultural machinery according to claim 3, characterized in that: The external circulation air inlet channel (52) is in communication with the external circulation air inlets (8) which are provided through the two sides of the outer ceiling (1).

5. The special air conditioning device for positive pressure cab of agricultural machinery according to claim 4, characterized in that: The damper adjustment mechanism (7) comprises a damper baffle (71) arranged on the inner circulation air inlet channel (51) and the outer circulation air inlet channel (52) and intersecting horizontally and vertically, and a connecting rod (72) arranged on the inner end surface of the damper baffle (71); a sleeve (73) is arranged on the end of the connecting rod (72) away from the damper baffle (71); and a rotating shaft (74) driven by a servo motor (741) is arranged on the central axis of the sleeve (73).

6. The special air conditioning device for positive pressure cab of agricultural machinery according to claim 5, characterized in that: The servo motor (741) is electrically connected to the controller (63).

7. The special air conditioning device for positive pressure cab of agricultural machinery according to claim 1, characterized in that: An inspection cover (9) is provided on the top of the installation slot corresponding to the air-conditioning assembly (4) on the outer ceiling (1).

8. The special air conditioning device for positive pressure cab of agricultural machinery according to claim 1, characterized in that: The air conditioning assembly (4) is provided with six tubular air outlet cavities (42), and the air outlets of the air outlet cavities (42) are connected to the driving cab of the agricultural machinery.

9. The special air conditioning device for positive pressure cab of agricultural machinery according to claim 5, characterized in that: The air door baffle (71) can completely block the air inlet opening of the inner circulation air inlet channel (51) or the outer circulation air inlet channel (52).

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