Cab micro-pressurization control method and system and operation machine

Abstract

The invention discloses a cab micro-pressurization control method and system and an operation machine.The control method is applied to the cab micro-pressurization control system, a cab comprises an upper cabin and a lower cabin, the micro-pressurization control system comprises an air conditioning mechanism and a plurality of pressurization parts which are installed in the lower cabin, and air blown out by the pressurization parts enters the upper cabin through an air duct; the cab micro-pressurization control method comprises the steps that a starting instruction is sent to an air conditioning mechanism; controlling the air-conditioning mechanism to open according to the starting instruction; when the air conditioning mechanism is in the external circulation mode, the current internal pressure difference between the upper cabin and the lower cabin is obtained in real time; comparing the current internal pressure difference value with a preset pressure difference value; according to the comparison result, the corresponding number of pressurizing pieces are controlled to start. The booster pump is automatically controlled to work according to the internal pressure intensity in the cab, it is ensured that dust does not enter the upper cabin of the cab, and the purpose of improving the operation environment of a machinist is achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of operating machinery, and specifically relates to a cab micro-boost control method, system and operating machinery. Background Art

[0002] The cab of an excavator is where the operator works daily. The quality of the indoor environment directly affects the operator's operating mood and the working efficiency of the excavator. When working in dusty areas such as the field or mining areas, sand and dust are easily blown into the cab, affecting the operator's excavator operation experience. At present, the main method is to improve the sealing performance of the cab and use the excavator's own air conditioner to blow air into the cab to reduce the dust from entering the cab. However, for large mining excavators, the upper cabin of the cab is large, and it is difficult to achieve a good sealing effect. The air blown out by the air conditioner cannot ensure that the cab forms a positive pressure to prevent dust from entering. Therefore, a booster pump is added to the air conditioning system to blow air into the upper cabin of the cab to form an internal positive pressure, but the air volume is difficult to control. Once the booster pump blows a lot of air, the air pressure in the upper cabin of the cab is too high, and the operator will feel uncomfortable. At this time, the booster pump needs to be turned off manually. When the air pressure in the upper cabin of the cab is low, the booster pump is turned on manually again. This manual operation method is too frequent and the air volume cannot be controlled, resulting in a bad experience for the operator. Summary of the invention

[0003] The purpose of the present application is to provide a cab micro-boost control method, system and operating machine, which can automatically control the start-up of the corresponding boost pump according to the pressure in the upper cabin of the cab.

[0004] In order to achieve the above-mentioned object, the present application provides a cab micro-pressurization control method, which is applied to a cab micro-pressurization control system. The cab includes an upper cabin and a lower cabin. The micro-pressurization control system includes an air conditioning mechanism and a plurality of supercharging components installed in the lower cabin. The air blown out by the supercharging components enters the upper cabin through an air duct. The cab micro-pressurization control method includes:

[0005] Sending a start command to the air conditioning mechanism;

[0006] Control the air conditioning mechanism to open according to the start command;

[0007] When the air conditioning mechanism is in an external circulation mode, obtaining the current internal pressure difference between the upper cabin and the lower cabin in real time;

[0008] Compare the current internal pressure difference value with the preset pressure difference value;

[0009] According to the comparison result, the corresponding number of supercharging parts are controlled to start.

[0010] In some embodiments, the cab micro-boost control method further comprises the steps of:

[0011] During the operation of the supercharger, the current dust concentration in the upper cabin is obtained in real time;

[0012] Control the booster to work at the preset air volume level according to the current dust concentration;

[0013] Get the current internal pressure difference between the upper and lower cabins in real time;

[0014] Recalculate the activation quantity of the booster according to the current internal pressure difference;

[0015] The opening of the booster is controlled according to the starting quantity.

[0016] In some embodiments, the step of controlling the supercharging component to operate at a preset air volume level according to the current dust concentration includes:

[0017] Compare the current dust concentration with the preset dust concentration;

[0018] When the current dust concentration is greater than or equal to the preset dust concentration, the supercharging component is controlled to operate according to the first preset air volume level;

[0019] When the current dust concentration is less than the preset dust concentration, the supercharging component is controlled to operate according to the second preset air volume level;

[0020] Among them, the first preset air volume level is smaller than the second preset air volume level.

[0021] In some embodiments, the cab micro-boost control method further comprises the steps of:

[0022] After a preset number of boosters have been operating for a first preset time, obtaining a first current pressure of the upper cabin;

[0023] comparing the first current pressure with a preset required pressure of the upper cabin;

[0024] When the first current pressure is less than the preset required pressure, the current number of boosters are controlled to continue working;

[0025] When the first current pressure is greater than or equal to the preset required pressure, one of the boosters is controlled to close.

[0026] In some embodiments, when the current pressure is greater than or equal to the preset required pressure, the step of controlling one of the boosters to close further comprises:

[0027] After the pressurizing component is closed for a second preset time, obtaining a second current pressure of the upper cabin;

[0028] comparing the second current pressure with the preset required pressure;

[0029] When the second current pressure is less than the preset required pressure, controlling the closed supercharging component to restart;

[0030] When the second current pressure is greater than or equal to the preset required pressure, two of the pressurizing elements are controlled to be closed.

[0031] In some embodiments, the cab micro-boost control method further comprises the steps of:

[0032] When the air conditioning mechanism is in the internal circulation mode, multiple boost components are controlled to be closed.

[0033] A second aspect of the present application provides a cab micro-pressurization control system, which adopts the cab micro-pressurization control method as described above, wherein the cab includes an upper cabin and a lower cabin connected by a plurality of air ducts, and the cab micro-pressurization control system includes:

[0034] An air conditioning mechanism, comprising a plurality of air conditioning components;

[0035] Multiple superchargers, multiple superchargers and multiple air conditioning components are installed in the lower cabin, and the multiple superchargers and multiple air conditioning components share one air duct in a one-to-one correspondence;

[0036] A pressure difference detection component is installed in the lower cabin and is used to detect the pressure information of the upper cabin and the lower cabin;

[0037] The control module is connected to the pressure difference detection element for communication and is used to receive the pressure information signal sent by the pressure difference detection element. The control module controls the air conditioning mechanism and a corresponding number of supercharging elements to start according to the pressure information signal.

[0038] In some embodiments, the control module includes:

[0039] A voice input unit, used to receive voice commands from the operator in the cab;

[0040] The display unit is communicatively connected with the pressure difference detection element and the voice input unit, and the display unit is used to display the voice command and pressure information and send them to the air conditioning mechanism or the supercharging element.

[0041] In some embodiments, the control module also includes a distribution box installed in the lower cabin, which is communicatively connected to the display unit and is used to receive voice commands and pressure information sent by the display unit. The distribution box is used to control the operation of the booster according to the pressure information or voice commands sent by the display unit.

[0042] A third aspect of the present application provides a working machine, comprising the cab micro-boost control system as described above.

[0043] Through the above technical solution, the cab micro-boost control method, system and operating machine provided by the embodiments of the present invention have the following beneficial effects:

[0044] Through the above technical solution, since the micro-boost control system includes an air-conditioning mechanism and multiple superchargers installed in the lower cabin, the air blown out by the superchargers enters the upper cabin through the air duct. When the upper cabin of the cab is working, first send a start command to the air-conditioning mechanism; control the air-conditioning mechanism to open according to the start command; when the air-conditioning mechanism is in the external circulation mode, obtain the current internal pressure difference between the upper cabin and the lower cabin in real time; compare the current internal pressure difference value with the preset pressure difference value; and control the corresponding number of superchargers to start according to the comparison result. When the upper cabin of the cab of the present application is working, it can automatically adjust the number of superchargers to be started according to the internal pressure difference, so that the pressure of the cab is within a suitable range, and realize micro-boosting of the cab, so as to achieve the purpose of improving the operating environment of the cab.

[0045] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present application, but do not constitute a limitation on the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In the drawings:

[0047] Figure 1 A schematic flow chart of a cab micro-boost control method of the present application;

[0048] Figure 2 This is a schematic diagram of the connection relationship between various modules in the cab micro-boost control system of this application.

[0049] Description of Reference Numerals

[0050] 100 Pressure difference detection unit 400 Voice input unit

[0051] 200 Pressure booster 500 Display unit

[0052] 300 Air conditioning parts 600 Distribution box DETAILED DESCRIPTION

[0053] The specific implementation of the present application is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present application, and is not used to limit the present application.

[0054] The following describes the cab micro-boost control method, system and working machine according to the present application with reference to the accompanying drawings.

[0055] like Figure 1As shown, the present application provides a cab micro-pressurization control method, which is applied to a cab micro-pressurization control system. The cab includes an upper cabin and a lower cabin. The micro-pressurization control system includes an air conditioning mechanism and a plurality of superchargers 200 installed in the lower cabin. The air blown out by the superchargers 200 enters the upper cabin through an air duct. The superchargers 200 are supercharger pumps. The cab micro-pressurization control method includes:

[0056] S10: Sending a start command to the air conditioning mechanism;

[0057] S20: Control the air conditioning mechanism to turn on according to the start command;

[0058] S30: when the air conditioning mechanism is in an external circulation mode, obtaining a current internal pressure difference between the upper cabin and the lower cabin in real time;

[0059] S40: Compare the current internal pressure difference value with the preset pressure difference value;

[0060] S50: Control a corresponding number of supercharging components 200 to start according to the comparison result.

[0061] When the upper cabin of the cab is working, first send a start command to the air conditioning mechanism, and the air conditioning mechanism can be turned on according to the start command. Since the air conditioning mechanism has two working modes, internal circulation and external circulation, when the air conditioning mechanism is in the external circulation mode, the current internal pressure difference between the upper cabin and the lower cabin of the cab is obtained in real time during the operation of the air conditioning mechanism; the current internal pressure difference value and the preset pressure difference value are compared, and the internal pressure of the upper cabin is judged by the comparison result, so that the corresponding number of superchargers 200 can be controlled to start according to the comparison result. The cab micro-pressurization control method of the present application can automatically adjust the start number of superchargers 200 according to the internal pressure difference when the upper cabin of the cab is working, so that the pressure of the cab is within a suitable range, and the cab is micro-pressurized, so as to prevent the driver from feeling uncomfortable due to the excessive pressure in the upper cabin of the cab.

[0062] In some embodiments, the cab micro-boost control method further comprises the steps of:

[0063] During the operation of the supercharging component 200, the current dust concentration in the upper cabin is obtained in real time;

[0064] According to the current dust concentration, the supercharging component 200 is controlled to work according to the preset air volume level;

[0065] Get the current internal pressure difference between the upper and lower cabins in real time;

[0066] Recalculate the activation quantity of the supercharging component 200 according to the current internal pressure difference;

[0067] The opening of the booster 200 is controlled according to the starting quantity.

[0068] According to the relevant standards for environmental testing of earth-moving machinery cabs, the pressurization range in the cab is 50-200 Pascals. The higher the pressure in the cab, the more uncomfortable the operator will feel, affecting the operating experience. According to the dust concentration at the construction site and the accuracy of the differential pressure sensor, the cab pressure difference is designed to be 60 Pascal, 120 Pascal, and 180 Pascal. They are recorded as P1, P2, and P3 in the control program. By default, the cab pressure difference is 60 Pascals when the booster pump is turned on. The low gear of the booster pump corresponds to a cab pressure difference of 120 Pascals, and the high gear of the booster pump corresponds to a cab pressure difference of 180 Pascals.

[0069] During control, the operator issues a command to lower the air volume of the booster pump according to the dust concentration on site and the tightness of the upper cabin of the cab. When the operator feels that a lot of dust has entered the upper cabin of the cab, the voice input module sends the command to the display screen, which collects the pressure difference sensor signal sent by the controller in real time and recalculates the number of booster pumps to be opened.

[0070] In some embodiments, the step of controlling the supercharging component 200 to operate at a preset air volume level according to the current dust concentration includes:

[0071] Compare the current dust concentration with the preset dust concentration;

[0072] When the current dust concentration is greater than or equal to the preset dust concentration, the supercharging component 200 is controlled to operate according to the first preset air volume level;

[0073] When the current dust concentration is less than the preset dust concentration, the supercharging component 200 is controlled to operate according to the second preset air volume level;

[0074] Among them, the first preset air volume level is smaller than the second preset air volume level.

[0075] Since the micro-boost control program sets the default gear (60 Pascal), small gear (120 Pascal) and large gear (180 Pascal), the operator can adjust the pressure of the upper cabin of the cab through voice input according to the dust concentration at the construction site and the sealing condition of the upper cabin of the cab, and keep the internal pressure at a certain gear through the algorithm to achieve the best effect of preventing dust from entering the upper cabin of the cab, and the operator will not feel uncomfortable due to excessive pressure in the upper cabin of the cab.

[0076] Further, in order to facilitate a detailed understanding of the process, the pressurization process is described in detail as follows:

[0077] When the operator enters the upper cabin of the cab and starts the engine to work, he issues command values ​​such as "turn on the air conditioner" and "turn on the external circulation". The voice input module receives the command and sends it to the display screen. The display screen forwards these commands to the air conditioning system, allowing the air conditioning mechanism to execute the command. At the same time, the booster pump is turned on, and the pressure in the upper cabin of the cab is set to P1 by default. The display screen compares the collected pressure signal with the pressure setting value of the upper cabin of the cab to determine the number of booster pumps to be turned on. The display screen sends the signal to the distribution box 600, and the distribution box 600 output drives the corresponding booster pump to be powered on. According to the dust concentration on site and the sealing of the upper cabin of the cab, when the operator feels that more dust has entered the upper cabin of the cab, he issues a command for the booster pump to set the air volume to a low gear. The voice input module sends the command to the display screen, and the display screen collects the pressure difference sensor signal sent by the controller in real time, and recalculates the number of booster pumps to be turned on. The display screen sends the signal to the intelligent distribution box 600 again, and the output port of the intelligent distribution box 600 drives the booster pump. When the operation is completed, the operator outputs the command "turn off the air conditioner". After receiving the signal, the display screen sends a signal to stop the booster pump to the intelligent power distribution box 600, and the intelligent power distribution box 600 stops outputting. If the air volume of the booster pump at a low gear is insufficient, the operator can select a high gear of the booster pump to repeat the above operation.

[0078] In some embodiments, the cab micro-boost control method further comprises the steps of:

[0079] After a preset number of boosters 200 have worked for a first preset time, a first current pressure of the upper cabin is obtained;

[0080] comparing the first current pressure with a preset required pressure of the upper cabin;

[0081] When the first current pressure is less than the preset required pressure, the current number of boosters 200 are controlled to continue working;

[0082] When the first current pressure is greater than or equal to the preset required pressure, one of the pressurizing components 200 is controlled to be closed.

[0083] After a preset number of booster pumps are turned on for the first preset time, the first current pressure inside the upper cabin is obtained. When the first current pressure is less than the preset required pressure, it means that the internal pressure of the upper cabin has not yet reached the corresponding pressure requirement. At this time, the working booster pumps are controlled to continue working until the first current pressure reaches the preset required pressure. When the first current pressure is greater than or equal to the preset required pressure, it means that the internal pressure of the upper cabin has reached the corresponding pressure requirement. Therefore, one of the booster pumps is controlled to be turned off, and the other booster pumps continue to work to prevent the internal pressure of the upper cabin from continuing to increase and affecting the operator's operating experience.

[0084] In some embodiments, when the current pressure is greater than or equal to the preset required pressure, the step of controlling one of the boosting components 200 to close further includes:

[0085] After the pressurizing element 200 is closed for a second preset time, obtaining a second current pressure of the upper cabin;

[0086] comparing the second current pressure with the preset required pressure;

[0087] When the second current pressure is less than the preset required pressure, the closed supercharging component 200 is controlled to restart;

[0088] When the second current pressure is greater than or equal to the preset required pressure, two of the pressurizing members 200 are controlled to be closed.

[0089] In this embodiment, after one of the boost pumps is turned off for the second preset time, the second current pressure of the upper cabin is collected again. When the second current pressure is less than the preset required pressure, it means that the pressure of the upper cabin does not meet the required pressure value at this time, and it is necessary to continue to boost the pressure, so the boost pump that has been turned off is controlled to restart. When the second current pressure is greater than or equal to the preset required pressure, it means that the pressure of the upper cabin has met the needs at this time and no additional boost is required, so two of the boost pumps can be controlled to be turned off, and the remaining boost pumps can be used to achieve micro-boosting, so that the upper cabin can maintain the current pressure to work. It should be noted that when two of the boost pumps are controlled to be turned off, the two boost pumps at this time can include a boost pump that has been turned off. Through the above-mentioned boosting maintenance method, the internal current pressure of the upper cabin of the cab can be maintained at a certain gear, so as to achieve the best effect of preventing dust from entering the upper cabin of the cab, and the driver will not feel uncomfortable because the pressure of the upper cabin of the cab is too high.

[0090] It should be noted that in the above pressure maintenance control mode, when it is detected that the current pressure inside the upper cabin is greater than the preset required pressure, one or more of the multiple booster pumps can be closed according to demand, which is not limited here. In addition, the preset required pressure can be determined according to the pressure tolerance requirements of the operator, which is not limited here.

[0091] In some embodiments, the cab micro-boost control method further comprises the steps of:

[0092] When the air conditioning mechanism is in the internal circulation mode, the plurality of supercharging elements 200 are controlled to be closed.

[0093] When the air-conditioning mechanism is in the internal circulation mode, there is no need for micro-pressurization inside the cab, so at this time, multiple booster pumps are controlled to be in a closed state, and internal air circulation in the upper cabin of the cab is achieved through the air-conditioning mechanism.

[0094] like Figure 2As shown, the second aspect of the present application provides a cab micro-pressurization control system, which adopts the cab micro-pressurization control method as described above, and the cab includes an upper cabin and a lower cabin connected by multiple air ducts, and the cab micro-pressurization control system includes an air-conditioning mechanism, multiple superchargers 200, a pressure difference detection component 100 and a control module; the air-conditioning mechanism includes multiple air-conditioning components 300, and the air-conditioning components 300 provide cold air to the upper cabin of the cab through the air duct in the high temperature season, and provide warm air to the cab through the air duct in the low temperature season; the multiple superchargers 200 and the multiple air-conditioning components 300 are all installed in the lower cabin, and the multiple superchargers 200 and the multiple air-conditioning components 300 share one air duct in a one-to-one correspondence; the pressure difference detection component 100 is installed in the lower cabin and is used to detect the pressure information of the upper cabin and the lower cabin; the control module is communicatively connected to the pressure difference detection component 100 and is used to receive the pressure information signal sent by the pressure difference detection component 100, and the control module controls the start-up of the air-conditioning mechanism and the corresponding number of superchargers 200 according to the pressure information signal.

[0095] Among them, the booster pump is responsible for replenishing air to the upper cabin of the cab. The booster pump is installed in the lower cabin of the cab, and the air blown out by the booster pump enters the upper cabin of the cab through the air duct. Since the upper cabin of the mining excavator cab has a large space, multiple booster pumps are generally used to pressurize the upper cabin to achieve a micro-pressurization effect. In this solution, three booster pumps are used to pressurize the upper cabin. According to the air duct control requirements, the booster pump only works when the air conditioner is in external circulation; the booster pump does not work when the air conditioner is in internal circulation.

[0096] Furthermore, the differential pressure detection element 100 is a differential pressure sensor, which is mainly used to detect the difference between the pressure of the upper cabin space of the cab and the atmospheric pressure. The differential pressure sensor is installed in the upper cabin of the cab, and has two air pipes built in it, one of which is connected to the upper cabin of the cab to detect the air pressure of the upper cabin of the cab; the other air pipe passes through the sealing hole of the upper cabin bottom plate of the cab and is connected to the lower cabin of the cab to detect the air pressure of the lower cabin of the cab. Since the lower cabin of the cab is not sealed, the atmospheric pressure is actually detected.

[0097] In addition, in other embodiments, two pressure sensors may be used for detection, one pressure sensor detects the pressure in the upper cabin of the cab, and the other pressure sensor detects the atmospheric environment pressure (that is, the lower cabin pressure). The pressure difference between the upper cabin of the cab and the atmospheric environment is calculated by the two pressure differences.

[0098] In some embodiments, the control module includes:

[0099] The voice input unit 400 is used to receive voice commands issued by the operator in the cab;

[0100] The display unit 500 is communicatively connected with the pressure difference detection element 100 and the voice input unit 400 . The display unit 500 is used to display the voice command and pressure information and send them to the air conditioning mechanism or the supercharging element 200 .

[0101] The display unit 500 includes a display screen, and the voice input unit 400 is used to collect the operator's voice input signal and send the signal to the display screen through the bus, so that the functions of "turn on the air conditioner", "turn off the air conditioner", "turn on the external circulation", "turn off the external circulation", "boost pump air volume small gear", "boost pump air volume large gear", "turn off the boost pump", "turn on the boost pump" and so on can be realized through voice control. By using the voice input unit 400 and the display unit 500, the functions of the boost pump and the air conditioner 300 of the entire cab can be controlled, and the operator can observe the current working conditions in real time.

[0102] In some embodiments, the control module further includes a power distribution box 600 installed in the lower cabin, the power distribution box 600 is connected to the display unit 500 for communication and is used to receive voice commands and pressure information sent by the display unit 500, and the power distribution box 600 is used to control the operation of the booster 200 according to the pressure information or voice commands sent by the display unit 500. Specifically, the power distribution box 600 receives the control signal sent by the display screen through the bus and outputs it, so as to drive the booster pump to work.

[0103] like Figure 2 As shown, when the number of air conditioning components 300 is three and the number of booster pumps is three, in order to further understand the pressure maintenance control process of the present application, the entire micro-pressure maintenance process is described in detail as follows:

[0104] First, adjust the air volume of the three air conditioning components 300 to the maximum level 6 through the display setting interface, and the operator turns on the air conditioning external circulation through voice control. At this time, the default pressure difference P1 in the cab is 60 Pascal. The pressure difference detection component 100 collects the air pressure difference sensor signal P4 in real time and sends it to the display. According to the air conditioning mechanism and the cab sealing design selection, when the three air conditioning components 300 are running at the maximum air volume, the pressure difference in the cab is less than 60 Pascal, and P4 is less than P1 at this time. The display calculates that booster pump 1, booster pump 2 and booster pump 3 need to output at the same time, and sends the result to the distribution box 600. After receiving the display signal, the distribution box 600 executes the output command, so that booster pump 1, booster pump 2 and booster pump 3 are powered.

[0105] After the three booster pumps are powered on and work for a period of time, the pressure in the upper cabin of the cab increases. At this time, the current real-time pressure P4 and the preset required pressure P in the upper cabin of the cab are read again. If P4 is less than P, booster pump 1, booster pump 2, and booster pump 3 need to be powered on at the same time. Otherwise, booster pump 3 is turned off and timing T is started at the same time. When time T reaches the preset time, the pressure difference signal P5 collected by the pressure difference detection component 100 is compared with P. When P5 is less than P, booster pump 1, booster pump 2, and booster pump 3 need to be turned on again at the same time. Otherwise, a signal is sent to the distribution box 600 through the display screen to turn off booster pump 2 and booster pump 3 at the same time. Thereby, the pressure in the entire upper cabin of the cab is kept within a certain pressure range, improving the working experience of the operator.

[0106] The third aspect of the present application provides a working machine, including the cab micro-boost control system as described above. The working machine may be a common machine such as an excavator. Since the working machine adopts all the embodiments of the cab micro-boost control system as described above, it has all the beneficial effects brought by the cab micro-boost control system as described above, which will not be described in detail here.

[0107] In the description of the present application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0108] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0109] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0110] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A cab micro-pressurization control method, characterized in that: Applied to a cab micro-pressurization control system, the cab comprises an upper cabin and a lower cabin, the micro-pressurization control system comprises an air conditioning mechanism and a plurality of supercharging components (200) installed in the lower cabin, the air blown out by the supercharging components (200) enters the upper cabin through an air duct, and the cab micro-pressurization control method comprises: sending a start instruction to the air conditioning mechanism; Controlling the air conditioning mechanism to turn on according to the start instruction; When the air conditioning mechanism is in an external circulation mode, obtaining in real time a current internal pressure difference between the upper cabin and the lower cabin; Comparing the current internal pressure difference value with a preset pressure difference value; A corresponding number of the boosting components (200) are controlled to start according to the comparison result.

2. The cab micro-boost control method according to claim 1, characterized in that: The cab micro-boost control method further comprises the steps of: acquiring the current dust concentration of the upper cabin in real time during the operation of the supercharging component (200); Controlling the pressurizing component (200) to operate at a preset air volume level according to the current dust concentration; acquiring in real time the current internal pressure difference between the upper cabin and the lower cabin; recalculating the activation quantity of the pressurizing component (200) according to the current internal pressure difference; The pressurizing member (200) is controlled to open according to the startup quantity.

3. The cab micro-boost control method according to claim 2, characterized in that: The step of controlling the supercharging component (200) to operate at a preset air volume level according to the current dust concentration comprises: comparing the current dust concentration with a preset dust concentration; When the current dust concentration is greater than or equal to the preset dust concentration, controlling the supercharging component (200) to operate according to a first preset air volume level; When the current dust concentration is less than the preset dust concentration, controlling the supercharging component (200) to operate according to a second preset air volume level; Wherein, the first preset air volume level is smaller than the second preset air volume level.

4. The cab micro-boost control method according to claim 1, characterized in that: The cab micro-boost control method further comprises the steps of: After a preset number of the pressurizing components (200) have been operating for a first preset time period, obtaining a first current pressure of the upper cabin; comparing the first current pressure with a preset required pressure of the upper cabin; When the first current pressure is less than the preset required pressure, controlling the current number of the boosting components (200) to continue working; When the first current pressure is greater than or equal to the preset required pressure, one of the boosting components (200) is controlled to be closed.

5. The cab micro-boost control method according to claim 4, characterized in that: The step of controlling one of the pressurizing components (200) to close when the current pressure is greater than or equal to the preset required pressure also includes: After the pressurizing component (200) is closed for a second preset time period, obtaining a second current pressure of the upper cabin; comparing the second current pressure with the preset required pressure; When the second current pressure is less than the preset required pressure, controlling the closed booster (200) to restart; When the second current pressure is greater than or equal to the preset required pressure, two of the boosting components (200) are controlled to be closed.

6. The cab micro-boost control method according to any one of claims 1 to 5, characterized in that: The cab micro-boost control method further comprises the steps of: When the air conditioning mechanism is in the internal circulation mode, the plurality of supercharging components (200) are controlled to be closed.

7. A cab micro-boost control system, characterized in that: The cab micro-pressurization control method according to any one of claims 1 to 6 is adopted, wherein the cab comprises an upper cabin and a lower cabin connected by a plurality of air ducts, and the cab micro-pressurization control system comprises: An air conditioning mechanism, comprising a plurality of air conditioning components (300); A plurality of supercharging components (200), wherein the plurality of supercharging components (200) and the plurality of air conditioning components (300) are all installed in the lower cabin, and the plurality of supercharging components (200) and the plurality of air conditioning components (300) share one air duct in a one-to-one correspondence; A pressure difference detection element (100), installed in the lower cabin and used to detect pressure information of the upper cabin and the lower cabin; A control module is connected to the pressure difference detection element (100) for communication and is used to receive a pressure information signal sent by the pressure difference detection element (100), and the control module controls the start-up of the air conditioning mechanism and a corresponding number of the boosting elements (200) according to the pressure information signal.

8. The cab micro-boost control system according to claim 7, characterized in that: The control module includes: A voice input unit (400) is used to receive a voice command issued by the operator in the cab; A display unit (500), the display unit (500) being communicatively connected to both the pressure difference detection component (100) and the voice input unit (400), the display unit (500) being used to display the voice command and the pressure information and send them to the air conditioning mechanism or the supercharging component (200).

9. The cab micro-boost control system according to claim 8, characterized in that: The control module further comprises a distribution box (600) installed in the lower cabin, wherein the distribution box (600) is communicatively connected with the display unit (500) and is used to receive the voice command and the pressure information sent by the display unit (500), and the distribution box (600) is used to control the operation of the booster (200) according to the pressure information or voice command sent by the display unit (500).

10. A working machine, characterized in that: It comprises a cab micro-boost control system according to any one of claims 7 to 9.

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