Condenser cleaning device suitable for liquid cooling unit

Abstract

The utility model provides a condenser cleaning device suitable for a liquid cooling unit, which comprises a cleaning fluid supply system, a condenser cleaning system, a condenser cleaning system, a condenser cleaning system and a condenser cleaning system, the cleaning nozzle assembly is communicated with the cleaning liquid supply system, and the cleaning nozzle assembly is arranged corresponding to a condenser of the liquid cooling unit; the dirt recovery system comprises a collecting tank and a filtering device, the collecting tank is connected with the filtering device, and the collecting tank is arranged at the bottom of the condenser; and the control system can control the cleaning liquid supply system, the cleaning nozzle assembly and the dirt recovery system to clean dirt on the condenser. The condenser cleaning device solves the technical problems that dirt on the surface of a condenser is difficult to clean thoroughly and the condenser may be corroded in a traditional condenser cleaning method.

Description

TECHNICAL FIELD

[0001] The utility model relates to refrigeration technical field, specifically, relate to a condenser cleaning device suitable for liquid cooling unit. BACKGROUND

[0002] Liquid cooling unit has wide application in industrial production, data center and many fields, and the performance of the condenser is crucial to the operation efficiency and stability of the whole liquid cooling unit. With the long-term operation of the liquid cooling unit, dirt will gradually accumulate on the surface of the condenser, which will reduce the heat exchange efficiency of the condenser, resulting in increased energy consumption of the liquid cooling unit, reduced refrigeration effect and other problems. The traditional condenser cleaning method includes manual cleaning and chemical cleaning. Manual cleaning often fails to completely remove the dirt on the surface of the complex structure inside the condenser, and it is difficult to operate and inefficient for some inaccessible parts. Chemical cleaning may cause corrosion to the metal material of the condenser, and the discharge of chemical agents may pollute the environment.

[0003] The existing problem is that the traditional condenser cleaning method cannot completely remove the dirt on the surface of the condenser, and may cause corrosion to the condenser. SUMMARY

[0004] The utility model solves the technical problem that the traditional condenser cleaning method cannot completely remove the dirt on the surface of the condenser, and may cause corrosion to the condenser. The utility model realizes effective removal and collection of the dirt on the surface of the condenser by the cleaning nozzle assembly to flush the dirt on the condenser, and the collection tank collects all the dirt and cleaning liquid flushed from the condenser.

[0005] To solve the above problems, the utility model provides a condenser cleaning device suitable for liquid cooling unit, which comprises: a cleaning liquid supply system for supplying cleaning liquid; a cleaning nozzle assembly connected to the cleaning liquid supply system, and corresponding to the condenser of the liquid cooling unit; a dirt recovery system comprising a collection tank and a filter device, the collection tank being connected to the filter device, and the collection tank being arranged at the bottom of the condenser; and a control system capable of controlling the cleaning liquid supply system, the cleaning nozzle assembly and the dirt recovery system to clean the dirt on the condenser.

[0006] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: through cooperation of the cleaning liquid supply system and the cleaning spray head assembly, efficient cleaning of the surface of the condenser can be achieved, dirt and deposits can be completely removed, and the heat exchange efficiency of the condenser is improved. The dirt recovery system is arranged to collect and filter the dirt generated during the cleaning process, the cleaning liquid is recycled and reused, the utilization rate of the cleaning liquid is improved, and the cleaning cost is saved. The control system enables the cleaning process to be automatically controlled, reduces manual intervention, improves the safety and reliability of the cleaning, and reduces labor costs.

[0007] In a possible design, the cleaning liquid supply system comprises a liquid tank, a liquid pump and a pipeline; the liquid pump is connected to the liquid tank and the cleaning spray head assembly through the pipeline, and the liquid pump can deliver the cleaning liquid in the liquid tank to the cleaning spray head assembly.

[0008] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the arrangement of the liquid tank ensures continuous supply of the cleaning liquid, avoids interruption due to insufficient cleaning liquid during the cleaning process, and improves the continuity and efficiency of the cleaning operation. The liquid pump can adjust the flow of the cleaning liquid according to actual needs, flexibly adjust the injection pressure and flow of the cleaning liquid according to different dirt levels and cleaning needs, and thus achieve more accurate cleaning effect. Moreover, the use of the liquid pump can reduce the risk of manual operation to a certain extent, especially when handling chemical cleaning liquid, reduces the direct contact of the operator, and improves the safety. Moreover, the separate arrangement of the liquid tank and the liquid pump makes it more convenient to replace and maintain the cleaning liquid, and the operator can quickly supplement the cleaning liquid and maintain the equipment, thereby reducing the maintenance cost and time.

[0009] In a possible design, a partition plate is arranged in the liquid tank to divide the liquid tank into a cleaning part and a water replenishing part; the cleaning part contains the cleaning liquid and is connected to the liquid pump; and the water replenishing part is used to supply water to the liquid cooling unit.

[0010] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the cleaning part is specially used to store the cleaning liquid, which can ensure sufficient supply of the cleaning liquid and thus improve the cleaning efficiency. By dividing the liquid tank into the cleaning part and the water replenishing part, the functions of the two parts are defined, the liquid tank is reused, and the installation space and production cost are saved.

[0011] In a possible design, the filter device comprises a dirt collection part and a filtered liquid outlet; the filter device is used to separate the dirt and the cleaning liquid in the collection tank, the separated cleaning liquid is discharged through the filtered liquid outlet, and the separated dirt is collected in the dirt collection part.

[0012] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the filtering device can effectively separate dirt and cleaning liquid, ensure the purity of the cleaning liquid, improve the efficiency of the subsequent cleaning process, and avoid the re-attachment of dirt on the surface of the condenser. The setting of the dirt collecting part enables the separated dirt to be collected centrally, facilitating subsequent processing and cleaning and reducing the risk of secondary pollution during the cleaning process. At the same time, through effective filtering and separation, the quality of the cleaning liquid is maintained, the service life of the cleaning liquid is prolonged, and the replacement frequency of the cleaning liquid is reduced, thereby saving resources and costs.

[0013] In one possible design, the liquid storage tank is provided with a liquid return port, and the filtered liquid outlet is connected to the liquid return port through a pipeline.

[0014] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: by connecting the filtered liquid outlet to the liquid return port, the recycling of the cleaning liquid can be realized, the filtered cleaning liquid can be returned to the liquid storage tank, the consumption of the cleaning liquid is reduced, and the resource utilization efficiency is improved. Moreover, the recycling of the cleaning liquid reduces the demand for new cleaning liquid, thereby reducing the operating cost during the cleaning process, especially in large-scale cleaning operations, and the economic benefits are significant.

[0015] In one possible design, the cleaning nozzle assembly includes an adjustable nozzle, which can be telescopic and multi-angle adjustable.

[0016] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the telescopic and multi-angle adjustable functions of the adjustable nozzle enable the nozzle to adapt to condensers of different shapes and sizes, flexibly adjust the spraying angle and distance, and thus achieve more comprehensive cleaning coverage. Moreover, by adjusting the angle and position of the nozzle, precise cleaning can be performed on specific dirt areas, ensuring that the cleaning liquid can effectively reach the dirt accumulation sites and improving the cleaning effect. At the same time, through precise spraying control, the waste of cleaning liquid can be effectively reduced, ensuring that the cleaning liquid is reasonably utilized and reducing the operating cost.

[0017] In one possible design, the control system includes a sensor, a controller, and an operation panel; the sensor is arranged corresponding to the condenser, and the controller is connected to the sensor; the controller is connected to the operation panel, the cleaning liquid supply system, the cleaning nozzle assembly, and the dirt recycling system.

[0018] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the state of the condenser is monitored in real time through the sensor, the controller can automatically adjust the supply of the cleaning liquid, the working state of the spray head and the recovery of the dirt, the automation level of the system is significantly improved, and manual intervention is reduced. Moreover, the setting of the sensor enables the system to monitor the working state and dirt accumulation of the condenser in real time, and the controller can adjust the cleaning strategy in a timely manner according to the information fed back by the sensor, so as to ensure the optimization of the cleaning effect. Meanwhile, the connection of the controller with each component enables the parameters in the cleaning process to be accurately controlled, and the pertinence and effectiveness of the cleaning are improved. Moreover, the control system can be flexibly adjusted according to different cleaning requirements and equipment states, the adaptability of the system is enhanced, and the requirements of various cleaning scenes can be met.

[0019] In a possible design, the sensor includes a temperature sensor and a dirt thickness sensor.

[0020] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the temperature sensor can monitor the working temperature of the condenser in real time, and the dirt thickness sensor can accurately measure the accumulation degree of the dirt. Such accurate monitoring capability enables the system to obtain the running state and cleaning requirement of the equipment in a timely manner. By combining the data of the temperature and the dirt thickness, the control system can formulate a more reasonable cleaning strategy. The real-time monitoring of the dirt thickness and the temperature change enables the cleaning process to be dynamically adjusted according to the actual situation, so that the conditions of excessive cleaning or insufficient cleaning are avoided, and the cleaning efficiency is improved.

[0021] In a possible design, the operation panel is installed on the outer metal plate of the liquid cooling unit.

[0022] Compared with the prior art, the technical effects achieved by adopting the technical scheme are as follows: the operation panel is installed on the outer metal plate of the liquid cooling unit, so that the operator can conveniently operate and monitor without opening the shell of the unit, and the convenience of operation is improved. Moreover, the operation panel installed on the outer side is convenient for daily inspection and maintenance, the operator can quickly obtain the required information, the maintenance time is reduced, and the work efficiency is improved.

[0023] In a possible design, the cleaning device further includes a movable frame, and the cleaning liquid supply system, the cleaning spray head assembly, the dirt recovery system and the control system are all installed on the movable frame.

[0024] Compared with the prior art, the technical effects reached by adopting the technical scheme are: the mobile frame is arranged, so that the cleaning device can be conveniently moved between different working sites, various cleaning requirements can be adapted, and the flexibility and maneuverability of the equipment are improved. Moreover, all the components are centrally installed on the mobile frame, space can be effectively saved, the trouble of moving the equipment multiple times in the cleaning process is avoided, and the working efficiency is improved. Meanwhile, by integrating all the systems together, the preparation time and the equipment moving time in the cleaning process are reduced, so that the overall cleaning efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 A structure diagram of a condenser cleaning device suitable for a liquid cooling unit according to an embodiment of the present application Figure One ;

[0026] Figure 2 A structure diagram of a condenser cleaning device suitable for a liquid cooling unit according to an embodiment of the present application Figure Two ;

[0027] Figure 3 A structure diagram of a condenser cleaning device suitable for a liquid cooling unit according to an embodiment of the present application Figure Three .

[0028] BRIEF DESCRIPTION OF DRAWINGS

[0029] 11-washing liquid supply system; 12-washing nozzle assembly; 13-condenser; 14-dirt recovery system; 15-collecting tank; 16-filtering device; 17-control system; 18-liquid storage tank; 19-liquid pump; 20-separation plate; 21-washing part; 22-water supplementing part; 23-sensor; 24-operation panel; 25-temperature sensor; 26-dirt thickness sensor. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0031] Referring to Figures 1 to 3The utility model provides a condenser cleaning device suitable for liquid cooling unit, include: cleaning fluid supply system 11, cleaning fluid supply system 11 is used for supplying cleaning fluid, cleaning spray head subassembly 12, cleaning spray head subassembly 12 intercommunication cleaning fluid supply system 11, and cleaning spray head subassembly 12 correspond the condenser 13 of liquid cooling unit setting, dirt recovery system 14, dirt recovery system 14 includes collecting tank 15 and filter device 16, collecting tank 15 connects filter device 16, and collecting tank 15 sets up at the bottom of condenser 13, control system 17, control system 17 can control cleaning fluid supply system 11, cleaning spray head subassembly 12 and dirt recovery system 14 and wash the dirt on condenser 13.

[0032] Specifically, in the embodiment, cleaning fluid supply system 11 can supply cleaning fluid to cleaning spray head subassembly 12, and the cleaning fluid is sprayed on the surface of condenser 13 by cleaning spray head subassembly 12, so that the dirt on the surface of condenser 13 is washed away. Dirt recovery system 14 includes collecting tank 15 and filter device 16, and collecting tank 15 is placed below condenser 13 and is used for collecting all dirt and cleaning fluid washed away from condenser 13. The collecting tank 15 is connected to the filter device 16, and the filter device 16 can separate the dirt and the cleaning fluid, so as to realize the recycling of the cleaning fluid.

[0033] Specifically, the principle of the liquid cooling unit is that the fluorine road side of the liquid cooling unit is a basic refrigeration cycle, and the 50% ethylene glycol aqueous solution in the water road is exchanged with the plate heat exchanger to reduce the temperature of the solution, and the water outlet side is connected to the liquid cooling plate to cool the battery. The unit system is composed of a compressor, a condenser 13, an electronic expansion valve, a plate, an expansion tank, a water pump and a water road. The 50% ethylene glycol aqueous solution is in the water supplement part 22 of the liquid storage tank 18. When the water pressure sensor on the main water road detects that the pressure decreases to a certain value, it is determined that the pipeline is short of water. At this time, the solution in the water supplement part 22 is pumped out by the water supplement pump and pumped into the water inlet pipeline of the main water pipe to maintain the normal operation of the unit. In addition, when the water pressure of the outlet pipeline of the main pipeline is too high, it exceeds the threshold value of the safety valve, and the safety valve starts and discharges the solution into the liquid storage tank 18. When the unit is normally operated, the liquid storage tank 18 is completely independent and does not affect the main circulating water road. Only when the water pressure is too low or too high, the liquid storage tank 18 plays a function of supplementing or storing liquid.

[0034] In an embodiment of the utility model, the cleaning fluid supply system 11 includes a liquid storage tank 18, a liquid pump 19 and a pipeline, wherein the liquid pump 19 is connected to the liquid storage tank 18 and the cleaning spray head subassembly 12 through the pipeline, and the liquid pump 19 can deliver the cleaning fluid in the liquid storage tank 18 to the cleaning spray head subassembly 12.

[0035] Specifically, in the embodiment, the liquid pump 19 is communicated with the liquid storage tank 18 at one end of the pipeline and communicated with the cleaning nozzle assembly 12 at the other end. Moreover, the liquid pump 19 can supply the cleaning liquid in the liquid storage tank 18 to the cleaning nozzle assembly 12 to flush the condenser 13. The control system 17 can control the driving strength of the liquid pump 19 according to the dirt degree of the condenser 13, so as to control the flushing strength of the cleaning nozzle assembly 12 and improve the cleaning effect. Moreover, adjusting the driving strength of the liquid pump 19 can flexibly adjust the injection pressure and flow of the cleaning liquid.

[0036] In an embodiment of the utility model, the liquid storage tank 18 is provided with a partition plate 20, which divides the liquid storage tank 18 into a cleaning part 21 and a water supplementing part 22; wherein the cleaning part 21 is filled with cleaning liquid and communicated with the liquid pump 19; the water supplementing part 22 is used for supplying water to the liquid cooling unit.

[0037] Specifically, in the embodiment, the liquid storage tank 18 is formed by setting the partition plate 20 in the original water supplementing tank of the liquid cooling unit. The partition plate 20 divides the liquid storage tank 18 into two independent cavities, one is the cleaning part 21 for containing cleaning liquid, and the other is the water supplementing part 22, which is equivalent to the original water supplementing tank of the liquid cooling unit, containing 50% ethylene glycol aqueous solution, and used for supplying water to the liquid cooling unit. The liquid pump 19 and the cleaning part 21 are connected by a hose, which can ensure firm connection and good sealing.

[0038] In an embodiment of the utility model, the filtering device 16 comprises a dirt collecting part and a filtered liquid outlet; wherein the filtering device 16 is used for separating the dirt and the cleaning liquid in the collecting tank 15, and the separated cleaning liquid is discharged through the filtered liquid outlet; and the separated dirt is collected in the dirt collecting part.

[0039] Specifically, in the embodiment, during the cleaning process, the flushed dirt and cleaning liquid fall into the collecting tank 15, and then are separated by the filtering device 16. The separated cleaning liquid is discharged from the filtering device 16 through the filtered liquid outlet, while the dirt is collected in the dirt collecting part of the filtering device 16, and is uniformly treated after the cleaning is completed.

[0040] In an embodiment of the utility model, the liquid storage tank 18 is provided with a liquid return port, and the filtered liquid outlet is communicated with the liquid return port through a pipeline.

[0041] Specifically, by setting the liquid return port on the top of the cleaning part 21 of the liquid storage tank 18, and connecting the filtered liquid outlet of the filtering device 16 and the liquid return port of the liquid storage tank 18 through a pipeline, the separated cleaning liquid in the filtering device 16 can be returned to the liquid storage tank 18, so as to realize the recycling of the cleaning liquid.

[0042] In an embodiment of the utility model, the cleaning nozzle assembly 12 comprises an adjustable nozzle, which can be telescopic and multi-angle adjustable.

[0043] Specifically, in the embodiment, the cleaning spray head assembly 12 comprises an adjustable spray head and a spray head support, and the spray head is installed on the spray head support in a telescopic and multi-angle adjustable manner.

[0044] In an embodiment of the utility model, the control system 17 comprises a sensor 23, a controller and an operation panel 24; wherein the sensor 23 is arranged corresponding to the condenser 13, and the controller is connected with the sensor 23; the controller is connected with the operation panel 24, the cleaning liquid supply system 11, the cleaning spray head assembly 12 and the dirt recycling system 14.

[0045] Specifically, the sensor 23 is arranged corresponding to the condenser 13 and is specifically installed on or near the surface of the condenser; wherein the controller can receive the feedback data of the sensor 23 and automatically adjust the working parameters of the cleaning spray head assembly 12, such as the spraying pressure, the spraying angle and the cleaning time, according to the feedback data.

[0046] In an embodiment of the utility model, the sensor 23 comprises a temperature sensor 25 and a dirt thickness sensor 26.

[0047] Specifically, the temperature sensor can monitor the working temperature of the condenser in real time, and the dirt thickness sensor can accurately measure the accumulation degree of dirt, and the control system 17 can control the spraying pressure and the spraying angle of the cleaning spray head assembly 12 according to the working temperature of the condenser and the accumulation degree of dirt, so as to better clean the dirt on the condenser 13.

[0048] Specifically, in the embodiment, the cleaning operation includes: injecting a specially prepared cleaning solution into the cleaning part 21 of the liquid storage tank 18, starting the cleaning program by operating the operation panel 24, and starting the liquid pump 19 according to preset parameters by the control system 17, so that the cleaning solution is delivered to the cleaning nozzle assembly 12. The nozzles start to spray the cleaning solution to the surface of the condenser 13, and at the same time, the control system 17 monitors the cleaning process in real time according to the data fed back by the sensor 23. If the sensor 23 detects that the dirt condition of a certain area of the condenser 13 deviates from the preset value, the controller automatically adjusts the spraying pressure, angle or cleaning time of the corresponding nozzle. For example, when it is detected that the dirt in a certain area is thicker, the spraying pressure and cleaning time of the nozzle in the area are increased. During the cleaning process, the dirt and the cleaning solution washed down fall into the collection tank 15, and then are separated by the filtering device 16. The separated cleaning solution returns to the cleaning part 21 of the liquid storage tank 18, and the dirt is collected in the dirt collection part of the filtering device 16 and is uniformly treated after the cleaning is completed. When the sensor 23 detects that the dirt of the condenser 13 has been completely removed and reaches the predetermined cleaning standard, the control system 17 stops the liquid pump 19 and the cleaning nozzle assembly 12, and completes a cleaning operation.

[0049] In an embodiment of the present application, the operation panel 24 is installed on the outer side panel of the liquid cooling unit.

[0050] Specifically, by installing the operation panel 24 on the outer side panel of the liquid cooling unit, the operator can conveniently operate and monitor without opening the unit shell, thereby improving the convenience of operation. Moreover, the outer installation of the operation panel facilitates daily inspection and maintenance, and the operator can quickly obtain the required information, thereby reducing the maintenance time and improving the work efficiency.

[0051] In an embodiment of the present application, the cleaning device further comprises a movable frame, and the cleaning solution supply system 11, the cleaning nozzle assembly 12, the dirt recovery system 14 and the control system 17 are all installed on the movable frame.

[0052] Specifically, the arrangement of the movable frame enables the cleaning device to conveniently move between different working sites and adapt to various cleaning requirements. Moreover, the centralized installation of all components on the movable frame can effectively save space and avoid the trouble of moving the equipment multiple times during the cleaning process, thereby improving the work efficiency. At the same time, the integration of all systems together reduces the preparation time and equipment moving time during the cleaning process, thereby improving the overall cleaning efficiency.

[0053] Although the present application is disclosed as above, the present application is not limited thereto. Any person skilled in the art, without departing from the spirit and scope of the present application, can make various changes and modifications, and therefore the protection scope of the present application should be subject to the scope defined by the claims.

Claims

1. A condenser cleaning device suitable for liquid-cooled units, characterized in that, The application relates to a liquid-cooled unit condenser cleaning device. The application comprises: a cleaning liquid supply system (11) for supplying cleaning liquid; a cleaning spray head assembly (12) connected with the cleaning liquid supply system (11) and corresponding to the condenser (13) of the liquid-cooled unit; a dirt recovery system (14) comprising a collecting tank (15) and a filtering device (16), wherein the collecting tank (15) is connected with the filtering device (16) and the collecting tank (15) is arranged at the bottom of the condenser (13); 2. The condenser cleaning device for a liquid chiller unit according to claim 1, wherein a control system (17) capable of controlling the cleaning of dirt on the condenser (13) by the cleaning liquid supply system (11), the cleaning spray head assembly (12) and the dirt recovery system (14). The cleaning liquid supply system (11) comprises a liquid storage tank (18), a liquid pump (19) and a pipeline; 3. The condenser cleaning device for a liquid chiller unit according to claim 2, wherein wherein the liquid pump (19) is connected with the liquid storage tank (18) and the cleaning spray head assembly (12) through the pipeline, and the liquid pump (19) can deliver the cleaning liquid in the liquid storage tank (18) to the cleaning spray head assembly (12). A partition plate (20) is arranged in the liquid storage tank (18) to divide the liquid storage tank (18) into a cleaning part (21) and a water replenishing part (22); 4. The condenser cleaning device for liquid chilling unit according to claim 2, wherein wherein the cleaning part (21) is filled with cleaning liquid and connected with the liquid pump (19); and the water replenishing part (22) is used for supplying water to the liquid-cooled unit. The filtering device (16) comprises a dirt collecting part and a filtered liquid outlet; 5. The condenser cleaning device for liquid chilling unit according to claim 4, wherein wherein the filtering device (16) is used for separating dirt and cleaning liquid in the collecting tank (15), and the separated cleaning liquid is discharged through the filtered liquid outlet; and the separated dirt is collected in the dirt collecting part.

6. The condenser cleaning device suitable for use with a liquid chiller unit of claim 1, wherein, The liquid storage tank (18) is provided with a liquid return port, and the filtered liquid outlet is connected with the liquid return port through a pipeline.

7. The condenser cleaning device suitable for use with a liquid chiller unit of claim 1, wherein, The cleaning spray head assembly (12) comprises an adjustable spray head which can be telescoped and adjusted at multiple angles. The control system (17) comprises a sensor (23), a controller and an operation panel (24); 8. The condenser cleaning device suitable for use with a liquid chiller unit of claim 7, wherein, wherein the sensor (23) is arranged corresponding to the condenser (13), the controller is connected with the sensor (23); and the controller is connected with the operation panel (24), the cleaning liquid supply system (11), the cleaning spray head assembly (12) and the dirt recovery system (14).

9. The condenser cleaning device suitable for use with a liquid chiller unit of claim 7, wherein, The sensor (23) comprises a temperature sensor (25) and a dirt thickness sensor (26).

10. The condenser cleaning device for a liquid chiller unit according to any one of claims 1-8, wherein, The operation panel (24) is installed on the outer metal plate of the liquid-cooled unit. The cleaning device further comprises a movable frame, and the cleaning liquid supply system (11), the cleaning spray head assembly (12), the dirt recovery system (14) and the control system (17) are all installed on the movable frame.

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