Automatic cleaning system for fuel cell radiator

Abstract

The invention relates to an automatic cleaning system for a fuel cell radiator. The automatic cleaning system comprises a heat exchange system, a cleaning system, a measurement and control system and a positioning system, a heat exchange system, a cleaning system and a measurement and control system are arranged on the positioning system; a circulating heating loop is formed between the heat exchange system and the cleaning system, and the heat exchange system, the cleaning system and a radiator to be cleaned form a circulating cleaning loop; the heat exchange system and the cleaning system are in control connection through the measurement and control system. The whole cleaning process is completely automatic, and the labor intensity of workers is reduced while the cleaning efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile manufacturing, and particularly relates to an automatic cleaning system for a fuel cell radiator. Background Art

[0002] A hydrogen fuel cell is a power generation device that directly converts hydrogen and oxygen into electrical energy through an electrochemical reaction. The heat dissipation method of a hydrogen fuel cell is different from that of a traditional internal combustion engine. The hydrogen fuel cell stack is immersed in the coolant. The coolant for the hydrogen fuel cell not only needs to have the performance of cooling, anti-corrosion, anti-freezing and anti-scaling of the traditional engine coolant, but also has the performance requirements of low conductivity and high cleanliness; when the conductivity of the coolant in the hydrogen fuel cell cooling system does not meet the requirements, it can cause the whole vehicle insulation alarm and even damage the engine.

[0003] The largest component in terms of volume and capacity in the dedicated cooling system for fuel cells is the radiator. Therefore, to ensure the conductivity of the entire cooling system, it is necessary to ensure the conductivity inside the radiator; the general method is to clean the radiator with deionized water before assembly. Before loading the vehicle, the radiator is placed horizontally, and deionized water is added to the inside of the radiator and left standing. This takes a long time and has low efficiency. On this basis, the method of manually shaking is used to let the deionized water wash the inside of the radiator. The method of manually shaking cannot achieve continuous cleaning with deionized water, the cleaning effect is poor, and the weight of a single radiator is about 30 kg, and at least two operators are required to lift and shake it, which is difficult to operate. Summary of the Invention

[0004] The purpose of the present invention is to provide an automatic cleaning system for a fuel cell radiator in view of the deficiencies of the prior art. The entire cleaning process is fully automated, which improves the cleaning efficiency and reduces the labor intensity of personnel at the same time.

[0005] The present invention is implemented by adopting the following technical solutions:

[0006] An automatic cleaning system for a fuel cell radiator includes a heat exchange system, a cleaning system, a measurement and control system, and a positioning system;

[0007] The heat exchange system, the cleaning system, and the measurement and control system are arranged on the positioning system; a circulating heating circuit is formed between the heat exchange system and the cleaning system, and a circulating cleaning circuit is formed between the heat exchange system, the cleaning system and the radiator to be cleaned; the heat exchange system and the cleaning system are controlled and connected by the measurement and control system.

[0008] As a further description of the invention, the heat exchange system includes: a heating water tank and a water pump I connected by a pipeline, which form a water heating circulation circuit with a double-loop heat exchanger;

[0009] A water injection pipe I and a drain pipe I are arranged on the heating water tank, and a stop valve I is arranged on the drain pipe I;

[0010] A temperature sensor one is provided on the heating water tank.

[0011] As a further description of the invention, the cleaning system includes: a deionized water tank, a cleaning water tank, and a water pump two connected by pipelines, forming a deionized water heating circulation loop with a double-loop heat exchanger;

[0012] A second water injection pipe is provided between the deionized water tank and the cleaning water tank, and a second drain pipe is provided on the cleaning water tank;

[0013] A one-way valve is provided on the second water injection pipe, and a second stop valve is provided on the second drain pipe;

[0014] A temperature sensor two and a conductivity sensor are provided on the cleaning water tank.

[0015] As a further description of the invention, the cleaning water tank, the double-loop heat exchanger, and the radiator to be cleaned form a deionized water circulation cleaning loop;

[0016] Two reversing valves are connected by pipelines between the cleaning water tank and the double-loop heat exchanger. The two reversing valves are connected in series, and the water outlets of the two reversing valves are connected to the water inlets and outlets of the radiator to be cleaned.

[0017] As a further description of the invention, the measurement and control system includes a control cabinet;

[0018] The water pump one, the stop valve one, the temperature sensor one, the water pump two, the one-way valve, the stop valve two, the temperature sensor two, the conductivity sensor, and the reversing valve are controlled and connected by the control cabinet.

[0019] As a further description of the invention, the positioning system includes a frame; the heat exchange system, the cleaning system, and the measurement and control system are arranged on the frame;

[0020] Two clamping devices are symmetrically arranged in the middle of the front side of the frame, and a plurality of positioning devices are arranged at the bottom end of the front side; the radiator to be cleaned is detachably arranged on the clamping devices and the positioning devices.

[0021] Compared with the prior art, the present invention has the following beneficial technical effects:

[0022] The present invention adopts a double-circulation system; among them, the circulating liquid in the heat exchange system is tap water, which has low cost and can be reused; the circulating liquid in the cleaning system is deionized water; the two circulation systems are physically isolated to avoid contamination of the deionized water in the cleaning system.

[0023] The present invention adopts a double-loop heat exchanger, where one loop is connected to the heat exchange system and the other loop is connected to the cleaning system. The main function of the double-loop heat exchanger is to transfer the heat of the tap water in the system to the deionized water in the cleaning system, so that the temperature of the deionized water reaches the optimal cleaning temperature of 70 - 80 °C;

[0024] The cleaning system of the present invention adopts a double-way valve. When the radiator is connected, the cleaning system forms a cleaning loop with the double-loop heat exchanger and the radiator to be cleaned to clean the radiator; when the radiator is not connected, the cleaning system forms a loop with the double-loop heat exchanger to clean the water tank;

[0025] The measurement and control system of the present invention can monitor the temperature, conductivity, etc. in real time, and control the opening and closing of each valve in the system through data, so as to realize the replacement or emptying of the liquid in the system. Brief Description of the Drawings

[0026] Figure 1 is the overall structural schematic diagram of the present invention;

[0027] Figure 2 is the structural schematic diagram of the heat exchange system of the present invention;

[0028] Figure 3 is the structural schematic of the cleaning system of the present invention Figure 1 ;

[0029] Figure 4 is the structural schematic of the cleaning system of the present invention Figure 2 ;

[0030] Figure 5 is the structural schematic diagram of the measurement and control system of the present invention;

[0031] Figure 6 is the structural schematic diagram of the radiator to be cleaned of the present invention.

[0032] In the figure: Z1, radiator to be cleaned; Z2, system of the present invention;

[0033] 1, heat exchange system; 2, cleaning system; 3, measurement and control system; 4, positioning system;

[0034] 11, water injection pipe 1; 12, heating water tank; 13, stop valve 1; 14, drain pipe 1; 15, outlet pipe 1; 16, water pump 1; 17, water pipe 1; 18, double-loop heat exchanger; 19, return water pipe 1;

[0035] 21. Deionized water tank; 22. Second water injection pipe; 23. Check valve; 24. Second water pump; 25. Second water outlet pipe; 26. Second stop valve; 27. Second drain pipe; 28. Cleaning water tank; 29. First reversing valve; 210. Second water pipe; 211. Third water pipe; 212. Second return water pipe; 213. Second reversing valve; 214. Fourth water pipe; 215. Fifth water pipe; 216. Sixth water pipe;

[0036] 31. Control cabinet;

[0037] 41. Frame; 42. Clamping device; 43. Positioning device. Detailed implementation manners

[0038] To make the objectives, technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0039] As Figures 1-6 shown, the embodiment of the present invention provides a fuel cell radiator automatic cleaning system, including a heat exchange system 1, a cleaning system 2, a measurement and control system 3 and a positioning system 4;

[0040] The heat exchange system 1, the cleaning system 2 and the measurement and control system 3 are arranged on the positioning system 4; a circulating heating loop is formed between the heat exchange system 1 and the cleaning system 2, and a circulating cleaning loop is formed between the heat exchange system 1, the cleaning system 2 and the radiator to be cleaned; the heat exchange system 1 and the cleaning system 2 are controlled and connected by the measurement and control system 3.

[0041] As Figure 2 shown, the embodiment of the present invention provides the heat exchange system 1, whose main function is that the circulating liquid in the system is tap water, with low cost and reusable; ordinary pure water is heated to above 80 °C (the working temperature of the fuel cell engine), and can be heated circularly;

[0042] The heat exchange system 1 includes a heating water tank 12, a first water pump 16 connected by pipelines, and forms a water heating circulation loop with a double-loop heat exchanger 18;

[0043] A first water injection pipe 11 and a first drain pipe 14 are arranged on the heating water tank 12, and each connecting pipeline includes: a first water outlet pipe 15 on the heating water tank 12 is connected to the first water pump 16, a first return water pipe 19 on the heating water tank 12 is connected to the double-loop heat exchanger 18, and the first water pump 16 and the double-loop heat exchanger 18 are connected by a first water pipe 17;

[0044] A first stop valve 13 is arranged on the first drain pipe 14; the emptying and replacement of tap water inside the heating water tank 12 can be realized;

[0045] A first temperature sensor is arranged on the heating water tank 12, which can detect the temperature in real time.

[0046] As Figure 3, 4 As shown in the figure, the embodiment of the present invention provides a cleaning system 2. The circulating liquid in the cleaning system 2 is deionized water. The cleaning system 2 and the heat exchange system 1 are connected through a double-loop heat exchanger 18. The double-loop heat exchanger 18 has two main functions. One is to transfer the heat of the tap water in the heat exchange system 1 to the deionized water in the cleaning system, so that the temperature of the deionized water reaches the optimal cleaning temperature of 70-80 °C. The other is to achieve physical isolation to avoid contamination of the deionized water.

[0047] The cleaning system 2 includes: a deionized water tank 21, a cleaning tank 28, and a second water pump 24 connected by pipelines, which form a deionized water heating circulation loop with the double-loop heat exchanger 18. When the radiator to be cleaned is not connected, internal circulation cleaning of the cleaning tank 28 is realized.

[0048] A second water injection pipe 22 is provided between the deionized water tank 21 and the cleaning tank 28, and a second drain pipe 27 is provided on the cleaning tank 28. Each connecting pipeline includes: an outlet pipe 25 on the cleaning tank 28 is connected to the second water pump 24, and the second water pump 24 is connected to the double-loop heat exchanger 18 by a sixth water pipe 216.

[0049] A one-way valve 23 is provided on the second water injection pipe 22 to prevent the liquid in the cleaning tank 28 from flowing back. A stop valve 26 is provided on the second drain pipe 27 to realize the emptying and replacement of the deionized water inside the cleaning tank 28.

[0050] A second temperature sensor and a conductivity sensor are provided on the cleaning tank 28 to detect the temperature and conductivity in real time.

[0051] As Figure 3 , 4 As shown in the figure, the cleaning tank 28, the double-loop heat exchanger 18, and the radiator to be cleaned form a deionized water circulation cleaning loop. When the radiator to be cleaned is connected, internal circulation cleaning of the radiator is realized.

[0052] Internal circulation cleaning of the cleaning tank 28 and internal circulation cleaning of the radiator are realized through a double reversing valve. The process is as follows:

[0053] Two reversing valves are connected in the pipeline between the cleaning tank 28 and the double-loop heat exchanger 18. The two reversing valves are connected in series, and the outlets of the two reversing valves are connected to the inlets and outlets of the radiator to be cleaned. Each connecting pipeline includes: a second return pipe 212 on the cleaning tank 28 is connected to the second reversing valve 213, the second reversing valve 213 is connected to the first reversing valve 29 by a second water pipe 210, a third water pipe 211 is provided on the second reversing valve 213, a fourth water pipe 214 is provided on the first reversing valve 29, and the first reversing valve 29 is connected to the double-loop heat exchanger 18 by a fifth water pipe 215.

[0054] Preferably, the double-loop heat exchanger 18 is made of 316L stainless steel, and all components of the cleaning system 2 are made of 316L stainless steel.

[0055] As Figure 5 shown, the embodiment of the present invention provides a measurement and control system 3, whose main functions are to monitor and record the water temperature and conductivity in each system in real time to judge the cleaning effect; and to realize the automatic control of the opening and closing functions of each valve in each system through a program;

[0056] The measurement and control system includes a control cabinet 31; a heating water tank 12, a first water pump 16, a first stop valve 13, a first temperature sensor, a second water pump 24, a check valve 23, a second stop valve 26, a second temperature sensor, a conductivity sensor, and a reversing valve are controlled and connected by the control cabinet 31; and the temperature controller and conductivity sensor on the radiator to be cleaned are controlled and connected.

[0057] As Figure 5 shown, the embodiment of the present invention provides a positioning system 4, whose main functions are to carry all components such as the heat exchange system 1, the cleaning system 2, the measurement and control system 3, and the radiator to be cleaned, and to vertically fix the cleaning radiator in the correct position to ensure that the positions of the water inlet and outlet of the radiator are aligned with the water pipes of the cleaning system 2;

[0058] The positioning system 4 includes a frame 41; the heat exchange system 1, the cleaning system 2, and the measurement and control system 3 are arranged on the frame 41;

[0059] Two clamping devices 42 are symmetrically arranged in the middle of the front side of the frame 41, and a plurality of positioning devices 43 are arranged at the bottom end of the front side; the radiator to be cleaned is detachably arranged on the clamping devices 42 and the positioning devices 43; the clamping devices 42 can be driven manually or electrically, as long as the radiator to be cleaned can be fixedly installed, and the corresponding motor can also be controlled by the control cabinet 31; preferably, the frame 41 is made of 45# steel; the contact parts of the clamping devices 42 and the positioning devices are made of polyurethane.

[0060] The embodiment of the present invention provides an operation method for an automatic cleaning tool for a fuel cell special radiator, including:

[0061] Step 1, operated by the operation control cabinet 31, close the first stop valve 13, and fill the heating water tank 12 with ordinary pure water from the first water injection pipe 11; turn on the heating function of the heating water tank 12 and turn on the circulation function of the first water pump 16;

[0062] Step 2: Close the second shut-off valve 26, adjust the first reversing valve 29 and the second reversing valve 213 to the internal circulation state, so that the cleaning water tank 28 and the double-loop heat exchanger 18 form a circulation system; open the check valve 23, inject deionized water from the deionized water tank 21 into the cleaning water tank 28, and automatically close the check valve 23 after the cleaning water tank 28 is full; turn on the circulation function of the second water pump 24, and heat the deionized water in the system through the double-loop heat exchanger 18 in the heat exchange system 1.

[0063] Step 3: Place the radiator to be cleaned on the positioning device 43 and adjust the clamping device 42; connect the water inlet pipe four 214 to the radiator water inlet and the water outlet pipe three 211 to the radiator water outlet.

[0064] Step 4: Adjust the first reversing valve 29 and the second reversing valve 213 to the external circulation state, so that the cleaning water tank 28, the double-loop heat exchanger 18 and the radiator form a circulation system; realize the circulating cleaning of the radiator through the circulation function of the second water pump 24; after the water temperature is detected by the temperature sensor at the radiator water inlet reaches 80 °C, control the heating power of the heating water tank 12 to decrease and maintain this temperature.

[0065] Step 5: After the conductivity of the deionized water in the system is detected by the conductivity sensor at the radiator water inlet ≥ 5 μS / cm, automatically turn off the second water pump 24, open the second shut-off valve 26, and drain the deionized water; close the second shut-off valve 26, reopen the check valve 23, and inject deionized water from the deionized water tank 21 into the cleaning water tank 28 again. After the cleaning water tank is full, automatically close the check valve 23; repeat the above steps until the conductivity of the deionized water in the cleaning system ≤ 5 μS / cm, which is regarded as the radiator cleaning is completed; after draining the deionized water in the cleaning system 2, the radiator can be disassembled.

[0066] The above operations only require one operator to complete the cleaning of the radiator; even if the auxiliary lifting device lifts the radiator to the positioning system 4 of this tooling, connects the inlet and outlet water ports of the radiator, operates the measurement and control system 3, starts the heating and circulation functions of the heat exchange system, and starts the water filling and circulation functions of the cleaning system 2.

[0067] In this article, the front, back, up, down and other orientation words are defined based on the positions of the components in the drawings and the positions of the components relative to each other, only for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of the orientation words should not limit the scope of protection claimed in this application.

[0068] Without conflict, the above embodiments and the features in the embodiments in this article can be combined with each other.

[0069] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic cleaning system for a fuel cell radiator, characterized in that It includes a heat exchange system (1), a cleaning system (2), a measurement and control system (3) and a positioning system (4); The heat exchange system (1), the cleaning system (2) and the measurement and control system (3) are arranged on the positioning system (4); A circulating heating circuit is formed between the heat exchange system (1) and the cleaning system (2), and a circulating cleaning circuit is formed between the heat exchange system (1), the cleaning system (2) and the radiator to be cleaned; The heat exchange system (1) and the cleaning system (2) are controlled and connected by the measurement and control system (3).

2. The automatic cleaning system for a fuel cell radiator according to claim 1, wherein, The heat exchange system (1) includes: a heating water tank (12) and a water pump one (16) connected by pipelines, which form a water heating circulation circuit with a double-loop heat exchanger (18); A water injection pipe one (11) and a drain pipe one (14) are arranged on the heating water tank (12), and a stop valve one (13) is arranged on the drain pipe one (14); A temperature sensor one is arranged on the heating water tank (12).

3. The fuel cell radiator automatic cleaning system according to claim 2, characterized in that, The cleaning system (2) includes: a deionized water tank (21), a cleaning water tank (28) and a water pump two (24) connected by pipelines, which form a deionized water heating circulation circuit with a double-loop heat exchanger (18); A water injection pipe two (22) is arranged between the deionized water tank (21) and the cleaning water tank (28), and a drain pipe two (27) is arranged on the cleaning water tank (28); A one-way valve (23) is arranged on the water injection pipe two (22), and a stop valve two (26) is arranged on the drain pipe two (27); A temperature sensor two and a conductivity sensor are arranged on the cleaning water tank (28).

4. The fuel cell radiator automatic cleaning system according to claim 3, characterized in that, The cleaning water tank (28), the double-loop heat exchanger (18) and the radiator to be cleaned form a deionized water circulation cleaning circuit; Two reversing valves are connected by pipelines between the cleaning water tank (28) and the double-loop heat exchanger (18), the two reversing valves are connected in series, and the water outlets of the two reversing valves are connected to the inlets and outlets of the radiator to be cleaned.

5. The fuel cell radiator automatic cleaning system according to claim 4, characterized in that, The measurement and control system includes a control cabinet (31); The water pump one (16), the stop valve one (13), the temperature sensor one, the water pump two (24), the one-way valve (23), the stop valve two (26), the temperature sensor two, the conductivity sensor and the reversing valve are controlled and connected by the control cabinet (31).

6. The automatic cleaning system for a fuel cell radiator according to claim 5, wherein The positioning system includes a frame (41); The heat exchange system (1), the cleaning system (2) and the measurement and control system (3) are arranged on the frame (41); Two clamping devices (42) are symmetrically arranged in the middle of the front side of the frame (41), and a plurality of positioning devices (43) are arranged at the bottom end of the front side; The radiator to be cleaned is detachably arranged on the clamping devices (42) and the positioning devices (43).

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