A filter cartridge self-cleaning air conditioning system and control method

Abstract

The application discloses a kind of filter core self-cleaning air conditioning systems and control method, system includes controller, with the device body of controller connection;Device body includes: sequentially connected outer circulation filter core, outer circulation air duct, internal and external circulation switching box, air blower, return air switching box, evaporative box, and the return air duct of connection return air switching box and the monitoring device placed in outer circulation air duct;Internal and external circulation switching box is also provided with internal and external circulation switching damper;Return air switching box is also provided with return air switching damper;Controller connects monitoring device, also respectively connects air blower, internal and external circulation switching damper and return air switching damper, for controlling device body enters filter core self-cleaning mode;When filter core is blocked, controller controls device body to switch filter core cleaning mode, evaporative box inlet is cut off, wind from internal circulation air inlet enters return air duct through air blower, and is reversed to blow out to outer circulation filter core through outer circulation air duct, reaches the effect of cleaning filter core.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning systems, and particularly relates to a filter element self-cleaning air conditioning system and a control method. BACKGROUND

[0002] An air conditioning system is an important component of various types of engineering machinery, and it undertakes the key tasks of adjusting the temperature in the cab, maintaining a suitable environment, and significantly improving the air quality in the cab.

[0003] In particular, in the application scenarios of heavy engineering machinery such as excavators, the working environment is often accompanied by a large amount of dust flying, and the content of particulate matter in the air is extremely high. In this case, the air external circulation filter element of the air conditioning system is easily contaminated and quickly clogged, which not only seriously hinders the air circulation efficiency, but also causes the cooling or heating effect of the air conditioning system to be greatly reduced, thereby affecting the air quality and temperature control in the cab.

[0004] At present, the fresh air filtering system of the air conditioning system is arranged on the side of the cab, and a filter element is arranged in the fresh air filtering system to filter air, and the filter element does not have a self-cleaning function. In addition, the filter element needs to be replaced regularly or manually cleaned to ensure the filtering effect, and the maintenance cost is high, and the maintenance cannot be performed according to the clogging condition of the filter element.

[0005] In order to effectively deal with this problem and improve the continuous operation ability of the air conditioning system and maintain a good environment in the cab, it is necessary to add a self-cleaning function of the external circulation filter element to the air conditioning system. SUMMARY

[0006] The purpose of the present application is to provide a filter element self-cleaning air conditioning system and a control method, which can realize the self-cleaning function of the external circulation filter element, do not need manual cleaning and maintenance, and can be maintained according to the clogging condition of the filter element, and the maintenance cost is lower.

[0007] To achieve the above purpose, the present application adopts the following technical solutions:

[0008] In a first aspect, the present application provides a filter element self-cleaning air conditioning system, comprising: a controller, and a device body connected with the controller.

[0009] The device body comprises: an outer circulation filter element, an outer circulation air duct, an inner-outer circulation switching box, a blower, a return air switching box, an evaporation box, a return air duct, and a monitoring device; the air inlet of the outer circulation air duct is connected to the outer circulation filter element, and the air outlet of the outer circulation air duct is connected to the outer circulation air inlet of the inner-outer circulation switching box; the inner-outer circulation switching box is further provided with an inner circulation air inlet and an inner-outer circulation switching damper; the air inlet of the blower is connected to the air outlet of the inner-outer circulation switching box, and the air outlet of the blower is connected to the air inlet of the return air switching box; the return air switching box is provided with an air outlet one and an air outlet two, the air outlet one is connected to the air inlet of the evaporation box, and the air outlet two is connected to the inlet of the return air duct; the outlet of the return air duct is connected to the return air inlet of the outer circulation air duct; the return air switching box is further provided with a return air switching damper for switching the filter element cleaning mode; the evaporation box is provided with an air outlet; and the monitoring device is arranged at the air inlet of the outer circulation air duct.

[0010] The controller is connected to the monitoring device for monitoring the air speed at the air inlet of the outer circulation air duct.

[0011] The controller is connected to the blower for controlling the blower to supply air.

[0012] The controller is connected to the inner-outer circulation switching damper and the return air switching damper for controlling the device body to enter the filter element self-cleaning mode.

[0013] Optionally, the air conditioning system further comprises a display module, the display module being connected to the controller for receiving the prompt signal sent by the controller.

[0014] Optionally, the monitoring device is an air speed sensor.

[0015] Optionally, when the device body enters the filter element self-cleaning mode, the inner-outer circulation switching damper is rotated to the outer circulation air inlet of the inner-outer circulation switching box, the outer circulation air inlet is cut off, the return air switching damper is rotated to the air outlet one of the return air switching box, the air inlet of the evaporation box is cut off, air flows from the outer circulation filter element through the outer circulation air duct and the blower into the evaporation box, and then flows out from the air outlet of the evaporation box.

[0016] The second aspect of the application provides a filter element self-cleaning air conditioner control method, which is realized by the filter element self-cleaning air conditioner system of the first aspect, and comprises the following steps:

[0017] Obtaining the real-time air speed at the air inlet of the outer circulation air duct of the device body;

[0018] Based on the real-time air speed, it is judged whether the real-time air speed at the air inlet is lower than a preset value, and if so, the device body is controlled to enter the filter element self-cleaning mode;

[0019] After the device body passes through the filter core self-cleaning mode, the real-time wind speed at the air inlet is judged again, and when the real-time wind speed at the air inlet is still lower than the preset value, a prompt signal for replacing the outer circulation filter core is sent.

[0020] Optionally, the control method further comprises: based on the display module receiving the prompt signal sent by the control module, the user is prompted to replace the outer circulation filter core.

[0021] Optionally, the real-time wind speed at the air inlet of the outer circulation air duct is detected by a monitoring device in the air conditioning device.

[0022] Optionally, the step of the control device body entering the filter core self-cleaning mode comprises:

[0023] The inner-outer circulation switching damper is rotated to the outer circulation air inlet of the inner-outer circulation switching box;

[0024] The return air switching damper is rotated to the air outlet one of the return air switching box;

[0025] The air blower is started to blow air.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] The filter core self-cleaning air conditioning system and control method provided by the present application, the return air switching box and the return air duct are arranged in front of the evaporative box air inlet of the conventional air conditioning system, and a detection device is added at the outer circulation air duct to detect the wind speed at the outer circulation air inlet; when the wind speed is lower than the preset value, it is judged that the filter core is blocked, and the controller controls the device body to switch the filter core cleaning mode, the evaporative box air inlet is cut off, the air enters the return air duct through the air blower from the inner circulation air inlet, and is blown out in the opposite direction through the outer circulation air duct to the outer circulation filter core, achieving the effect of cleaning the filter core and realizing the self-cleaning function of the outer circulation filter core. The system does not need manual cleaning and maintenance, and can be maintained according to the blockage of the filter core, with lower maintenance cost.

[0028] The filter core self-cleaning air conditioning system and control method provided by the present application can realize the self-cleaning function of the outer circulation filter core, automatically perform efficient and thorough cleaning operation on the filter core, thereby effectively removing accumulated dust, particulate matter and other impurities, and restoring the filtering performance of the filter core; in addition to significantly prolonging the service life of the filter core, reducing the replacement frequency and cost, it can also ensure that the air conditioning system always maintains the best working state, providing a more fresh and healthy driving space for the driver.

[0029] The filter core self-cleaning air conditioning system provided by the application also has a display module, if the controller still judges that the filter core is blocked after the external circulation filter core self-cleaning is performed, and the user can be reminded to replace the filter core according to the filter core blocking condition, thereby improving the overall performance of the engineering machinery and the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 Fig. 1 shows the device body structure schematic diagram of the filter core self-cleaning air conditioning system in an embodiment of the application.

[0031] Figure 2 Fig. 2 shows the structure block diagram of the filter core self-cleaning air conditioning system in an embodiment of the application.

[0032] Figure 3 Fig. 3 shows the cross-section schematic diagram of the device body in an embodiment of the application.

[0033] Figure 4 Fig. 4 shows the internal circulation air supply mode schematic diagram in an embodiment of the application.

[0034] Figure 5 Fig. 5 shows the external circulation air supply mode schematic diagram in an embodiment of the application.

[0035] Figure 6 Fig. 6 shows the filter core self-cleaning mode schematic diagram in an embodiment of the application.

[0036] Figure 7 Fig. 7 shows the flow chart of the filter core self-cleaning air conditioning control method in an embodiment of the application.

[0037] In the figure: 100, external circulation filter core; 200, external circulation air duct; 300, internal and external circulation switching box; 400, air blower; 500, return air switching box; 600, evaporation box; 700, return air duct; 201, monitoring device; 202, return air inlet; 301, internal circulation air inlet; 302, internal and external circulation switching air door; 303, external circulation air inlet; 401, air inlet of air blower; 402, air outlet of air blower; 501, air outlet one; 502, return air switching air door; 503, air outlet two; 601, air outlet of evaporation box. DETAILED DESCRIPTION

[0038] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. The following description of at least one example embodiment is merely illustrative in nature and is in no way limiting to the application or its applications or uses. Based upon the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort are within the scope of protection of the present application. Embodiment 1

[0039] Embodiments of the present application introduce a filter self-cleaning air conditioning system, as shown in Figures 1-3 The filter self-cleaning air conditioning system comprises:

[0040] The filter self-cleaning air conditioning system comprises a controller and a device body connected with the controller.

[0041] The device body comprises an outer circulation filter 100, an outer circulation air duct 200, an inner-outer circulation switching box 300, a blower 400, a return air switching box 500, an evaporation box 600, a return air duct 700 and a monitoring device 201; the air inlet of the outer circulation air duct 200 is connected with the outer circulation filter 100, and the air outlet of the outer circulation air duct 200 is connected with the outer circulation air inlet 303 of the inner-outer circulation switching box 300; the inner-outer circulation switching box 300 is further provided with an inner circulation air inlet 301 and an inner-outer circulation switching damper 302; the air inlet 401 of the blower is connected with the air outlet of the inner-outer circulation switching box 300, and the air outlet 402 of the blower is connected with the air inlet of the return air switching box 500; the return air switching box 500 is provided with an air outlet one 501 and an air outlet two 503, the air outlet one 501 is connected with the air inlet of the evaporation box 600, and the air outlet two 503 is connected with the inlet of the return air duct 700; the outlet of the return air duct 700 is connected with the return air inlet 202 of the outer circulation air duct 200; the return air switching box 500 is further provided with a return air switching damper 502 for switching the filter cleaning mode; the evaporation box 600 is provided with an air outlet 601; the monitoring device 201 is arranged at the air inlet of the outer circulation air duct 200;

[0042] The controller is connected with the monitoring device 201 for monitoring the air speed at the air inlet of the outer circulation air duct;

[0043] The controller is connected with the blower 400 for controlling the blower to send air;

[0044] The controller is connected with the inner-outer circulation switching damper 302 and the return air switching damper 502 for controlling the device body to enter the filter self-cleaning mode.

[0045] Specifically, the controller is connected with the monitoring device 201, receives the wind speed data of the monitoring device 201, and judges whether the outer circulation filter element 100 is blocked based on the wind speed data; based on the judgment result, the device body enters the filter element self-cleaning mode, and the filter element self-cleaning is performed, the evaporative box 600 is cut off, the air enters the return air duct 700 from the inner circulation air inlet through the air blower 400, and is reversely blown out to the outer circulation filter element 100 through the outer circulation air duct 200, so that the cleaning effect of the filter element is achieved, and manual cleaning and maintenance are not required, and the maintenance cost is lower.

[0046] In the embodiment, as shown in Figure 2 The filter element self-cleaning air conditioning system also comprises a display module connected with the controller and used for receiving the prompt signal sent by the controller. Specifically, after the controller controls the device body in the filter element self-cleaning mode, whether the outer circulation filter element 100 is blocked is judged again, if it is still blocked, that is, the wind speed is less than the preset value, the display module is sent with the prompt signal; the display module receives the prompt signal and displays "the filter element needs to be replaced", reminding the user to manually replace the filter element; the display module and the controller of the present application reduce the replacement frequency of the filter element and save the maintenance cost of the air conditioning system.

[0047] In the embodiment, the monitoring device is a wind speed sensor.

[0048] In the embodiment, as shown in Figure 4 The inner-outer circulation switching damper 302 and the return air switching damper 502 can also be used to switch the device body to the inner circulation air supply mode, and specifically include: the inner-outer circulation switching damper 302 is rotated to the outer circulation air inlet 303 of the inner-outer circulation switching box 300, the outer circulation air inlet is cut off due to the closing of the outer circulation air inlet 303 by the inner-outer circulation switching damper 302, and the air can only enter from the inner circulation air inlet 301 of the inner-outer circulation switching box 300; the return air switching damper 502 is rotated to the air outlet two 503 of the return air switching box 500, the inlet of the return air duct 700 connected with the air outlet two 503 is closed due to the closing of the air outlet two 503 by the return air switching damper 502, the return air is cut off, and the air passing through the return air switching box 500 can only enter the evaporative box 600 through the air outlet one 501 and flow out from the air outlet 601 of the evaporative box; specifically, the air enters the inner-outer circulation switching box 300 from the inner circulation air inlet 301, is transported to the evaporative box 600 by the air blower 400, and flows out from the air outlet 601 of the evaporative box.

[0049] In the embodiment, as shown in Figure 5As shown, the inner-outer circulation switching damper 302 and the return air switching damper 502 can also be used to switch the device body to the outer circulation air supply mode, which specifically includes: the inner-outer circulation switching damper 302 is rotated to the inner circulation air inlet 301 of the inner-outer circulation switching box 300, since the inner circulation air inlet 301 is closed by the inner-outer circulation switching damper 302, the inner circulation air inlet is cut off, and air can only enter from the outer circulation air inlet 303 of the inner-outer circulation switching box 300; the return air switching damper 502 is rotated to the air outlet two 503 of the return air switching box 500, since the air outlet two 503 is closed by the return air switching damper 502, the inlet of the return air duct 700 connected with the air outlet two 503 is also closed, the return air is cut off, and air passing through the return air switching box 500 can only enter the evaporative box 600 through the air outlet one 501 and flow out from the air outlet 601 of the evaporative box; specifically, air passes through the outer circulation filter element 100, enters the outer circulation air duct 200, enters the inner-outer circulation switching box 300, and enters the air blower 400 from the air outlet of the inner-outer circulation switching box 300, and is then transported by the air blower 400 to the evaporative box 600 and flows out from the air outlet 601 of the evaporative box.

[0050] In this embodiment, as shown in Figure 6 When the device body enters the filter element self-cleaning mode, the inner-outer circulation switching damper 302 is rotated to the outer circulation air inlet 303 of the inner-outer circulation switching box 300, since the outer circulation air inlet 303 is closed by the inner-outer circulation switching damper 302, the outer circulation air inlet from the outer circulation air duct 200 is cut off, and air can only enter from the inner circulation air inlet 301 of the inner-outer circulation switching box 300; the return air switching damper 502 is rotated to the air outlet one 501 of the return air switching box 500, since the air outlet one 501 is closed by the return air switching damper 502, the air inlet of the evaporative box 600 connected with the air outlet one 501 is also closed, the air inlet of the evaporative box 600 is cut off, and air passing through the return air switching box 500 can only enter the return air duct 700 through the air outlet two 503 and then enter the outer circulation air duct 200 through the return air duct 700 and flow out from the outer circulation filter element 100; specifically, air enters the inner-outer circulation switching box 300 from the inner circulation air inlet 301, is then transported by the air blower 400, and is then transported by the air blower 400 to the return air duct 700 and then reversely blown out to the outer circulation filter element 100 through the outer circulation air duct 200. Embodiment 2

[0051] As shown in Figure 7 An air conditioner filter element self-cleaning control method is introduced in the embodiment of the application, which is realized by the air conditioner filter element self-cleaning system as described in Embodiment 1, and specifically includes:

[0052] S01: acquiring a real-time air speed at an air inlet of an outer circulation air duct of the device body;

[0053] S02: judging based on the real-time wind speed, when the real-time wind speed at the air inlet is lower than the preset value, the control device body enters the filter core self-cleaning mode;

[0054] S03: after the device body goes through the filter core self-cleaning mode, judging again based on the real-time wind speed, when the real-time wind speed at the air inlet is still lower than the preset value, a prompt signal of needing to replace the outer circulation filter core is sent out.

[0055] Specifically, the control method further comprises: based on the display module receiving the prompt signal sent out by the control module, the user is displayed and reminded to replace the outer circulation filter core.

[0056] Specifically, the real-time wind speed at the air inlet of the outer circulation air duct is detected by the monitoring device in the air conditioning device.

[0057] Specifically, the step that the control device body enters the filter core self-cleaning mode comprises:

[0058] rotating the inner-outer circulation switching damper to the outer circulation air inlet of the inner-outer circulation switching box;

[0059] rotating the return air switching damper to the air outlet one of the return air switching box;

[0060] starting the air blower to blow air.

[0061] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above specific embodiments, the above specific embodiments are only illustrative, not restrictive, and those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. A filter core self-cleaning air conditioning system, characterized by, The air conditioner system comprises: a controller and a device body connected with the controller; the device body comprises: an outer circulation filter element, an outer circulation air duct, an inner-outer circulation switching box, a blower, a return air switching box, an evaporation box, a return air duct and a monitoring device; the air inlet of the outer circulation air duct is connected with the outer circulation filter element, and the air outlet of the outer circulation air duct is connected with the outer circulation air inlet of the inner-outer circulation switching box; the inner-outer circulation switching box is further provided with an inner circulation air inlet and an inner-outer circulation switching damper; the air inlet of the blower is connected with the air outlet of the inner-outer circulation switching box, and the air outlet of the blower is connected with the air inlet of the return air switching box; the return air switching box is provided with an air outlet one and an air outlet two, the air outlet one is connected with the air inlet of the evaporation box, and the air outlet two is connected with the inlet of the return air duct; the outlet of the return air duct is connected with the return air inlet of the outer circulation air duct; the return air switching box is further provided with a return air switching damper for switching the air outlet one and the air outlet two, and for switching the filter element cleaning mode; the evaporation box is provided with an air outlet; the monitoring device is arranged at the air inlet of the outer circulation air duct; the controller is connected with the monitoring device, and is used for monitoring the air speed at the air inlet of the outer circulation air duct; the controller is connected with the blower, and is used for controlling the blower to send air; the controller is connected with the inner-outer circulation switching damper and the return air switching damper, and is used for controlling the device body to enter the filter element self-cleaning mode.

2. The filter core self-cleaning air conditioning system according to claim 1, wherein, The air conditioner system further comprises a display module, the display module is connected with the controller, and is used for receiving the prompt signal sent by the controller.

3. The filter core self-cleaning air conditioning system of claim 2, wherein, The monitoring device is a wind speed sensor.

4. The filter core self-cleaning air conditioning system according to claim 3, wherein, When the device body enters the filter element self-cleaning mode, the inner-outer circulation switching damper is rotated to the outer circulation air inlet of the inner-outer circulation switching box, the outer circulation air inlet is cut off, the return air switching damper is rotated to the air outlet one of the return air switching box, the air inlet of the evaporation box is cut off, air flows from the inner circulation air inlet, enters the return air duct through the blower, and is reversely blown out to the outer circulation filter element through the outer circulation air duct.

5. An air conditioner control method of filter core self-cleaning, characterized by, The filter element self-cleaning air conditioner system is realized by the method according to any one of claims 1-4, and the method comprises: obtaining the real-time air speed at the air inlet of the outer circulation air duct of the device body; judging based on the real-time air speed, and when the real-time air speed at the air inlet is lower than a preset value, controlling the device body to enter the filter element self-cleaning mode; after the device body passes through the filter element self-cleaning mode, judging again based on the real-time air speed, and when the real-time air speed at the air inlet is still lower than the preset value, sending a prompt signal that the outer circulation filter element needs to be replaced. 6.The filter core self-cleaning air conditioner control method according to claim 5, characterized in that, The control method further comprises: receiving the prompt signal sent by the control module based on the display module, and displaying the prompt signal to the user, so as to remind the user to replace the outer circulation filter element. 7.The filter core self-cleaning air conditioner control method according to claim 6, characterized in that, The real-time air speed at the air inlet of the outer circulation air duct is detected by the monitoring device in the device body. 8.The filter core self-cleaning air conditioner control method according to claim 7, characterized in that, The step of controlling the device body to enter the filter element self-cleaning mode comprises: rotating the inner-outer circulation switching damper to the outer circulation air inlet of the inner-outer circulation switching box; rotating the return air switching damper to the air outlet one of the return air switching box; starting the blower to send air.

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