A method and device for automatic filling of antifreeze for fuel cells

Abstract

The present invention relates to the field of fuel cell anti-freezing filling devices, and discloses a method and device for automatic filling of fuel cell antifreeze. The device includes a fuel cell engine and an antifreeze filling device. The antifreeze filling device includes a detection module, an automatic infusion module, a liquid storage tank and a collection tray. The detection module and the automatic infusion module are arranged horizontally in parallel and are respectively connected to the fuel cell engine. The liquid storage tank is connected to the fuel cell engine through the detection module and the automatic infusion module. The collection tray is arranged at the lower end of the automatic infusion module. The automatic infusion module includes an infusion route and a reflux route. The automatic fuel cell antifreeze filling device provided by the present invention realizes the functions of automatic filling and extraction of antifreeze through the cooperation of a water pump and a liquid level detection sensor, can efficiently and safely complete related operations, and at the same time is designed with a reflux structure, combined with the collection tray, which can reduce liquid waste and achieve the purpose of saving antifreeze.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell antifreeze filling devices, and particularly to a method and device for automatically filling fuel cell antifreeze. Background Art

[0002] At present, fuel cells have been widely used in backup power support systems in various fields such as homes, venues, and base stations. In the northern autumn and winter seasons, the outdoor temperature is generally below zero. During the transportation and operation of fuel cell products, even if the products themselves have a certain antifreeze ability, it is still necessary to fill antifreeze to ensure that the residual moisture will not freeze and damage the internal structure of the fuel cell, thereby causing permanent damage to the fuel cell.

[0003] Since the main component of the antifreeze is ethylene glycol, certain protection is required during operation, including avoiding contact, preventing spills, and preventing slipping and falling. Based on the above considerations, the present invention designs a set of automated filling tooling that can complete related operations quickly, conveniently, and without pollution. Summary of the Invention

[0004] In order to solve the problems of manual filling of antifreeze in the prior art, antifreeze scattering, and low efficiency, the present invention provides a method and device for automatically filling fuel cell antifreeze.

[0005] The technical solution of the present invention is as follows:

[0006] An automatic fuel cell antifreeze filling device includes a fuel cell engine and an antifreeze filling device. The fuel cell engine is connected to the antifreeze filling device. The antifreeze filling device includes a detection module, an automatic infusion module, a liquid storage tank, and a collection tray. The detection module and the automatic infusion module are arranged horizontally in parallel and are respectively connected to the fuel cell engine. The liquid storage tank is connected to the fuel cell engine through the detection module and the automatic infusion module. The collection tray is arranged at the lower end of the automatic infusion module. The automatic infusion module includes an infusion route and a reflux route.

[0007] Further, the automatic infusion module further includes a first liquid level detection sensor. The reflux route is connected to the infusion route through the first liquid level detection sensor, and the reflux route is arranged below the infusion route.

[0008] Further, the reflux route includes a first water pump and a first valve. The first water pump is connected to the first valve. The infusion route includes a second water pump and a second valve. The second water pump is connected to the second valve. The second valve is connected to the fuel cell engine. The liquid storage tank is connected to the fuel cell engine through the second water pump and the second valve.

[0009] Further, the detection module includes a second liquid level detection sensor and an exhaust pipe. The exhaust pipe is arranged on the pipeline connecting the second liquid level detection sensor and the liquid storage tank. The detection module is arranged above the automatic infusion module, and the connection part of the detection module and the fuel cell engine is above the connection part of the automatic infusion module and the fuel cell engine.

[0010] Further, a high liquid level sensor and a low liquid level sensor are arranged on the liquid storage tank. The high liquid level sensor is arranged above the low liquid level sensor, and the connection part of the detection module and the liquid storage tank is higher than the high liquid level sensor.

[0011] Further, the second liquid level detection sensor and the fuel cell engine are connected by an L-shaped pipeline, and the L-shaped pipeline is arranged vertically.

[0012] Further, the first water pump and the second water pump are corrosion-resistant diaphragm pumps.

[0013] Further, the first valve and the second valve are electric ball valves.

[0014] The present invention also provides a method for automatically filling the fuel cell antifreeze. The method for automatically filling the fuel cell antifreeze is used for any of the above fuel cell antifreeze automatic filling devices, and includes:

[0015] S1: Start the fuel cell antifreeze automatic filling device. Connect the fuel cell engine and the antifreeze filling equipment, and fill the liquid storage tank with antifreeze until the liquid level exceeds the high liquid level sensor, and the liquid storage tank stops filling.

[0016] S2: Detect the liquid level of the fuel cell engine through the second liquid level detection sensor, and detect whether there is liquid in the L-shaped pipeline.

[0017] S3: When the second liquid level detection sensor does not detect liquid in the L-shaped pipeline, turn on the second water pump and the second valve on the infusion route, and the antifreeze in the liquid storage tank is filled into the fuel cell engine through the infusion route.

[0018] S4: When the second liquid level detection sensor detects liquid in the L-shaped pipeline, turn off the second water pump and the second valve, stop filling the fuel cell engine with antifreeze, and at the same time detect the liquid in the infusion route through the first liquid level detection sensor, detect whether there is liquid in the infusion route, and judge whether the reflux route needs to be turned on.

[0019] S5: When the first liquid level detection sensor detects liquid on the infusion route, turn on the first water pump and the first valve on the reflux route, and reflux the antifreeze that has not been filled into the fuel cell engine on the infusion route to the liquid storage tank.

[0020] Further, S1 includes: when the antifreeze in the liquid storage tank is lower than the low liquid level sensor, the antifreeze filling device starts to fill the antifreeze into the liquid storage tank.

[0021] The present invention has at least the following beneficial effects: The automatic filling device for the fuel cell antifreeze provided by the present invention realizes the functions of automatic filling and extraction of the antifreeze through the cooperation of the water pump and the liquid level detection sensor, and can efficiently and safely complete related operations. At the same time, a reflux structure is designed, combined with the collection tray, which can reduce liquid waste and achieve the purpose of saving antifreeze. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Among them:

[0024] 1 - Fuel cell engine;

[0025] 2 - Antifreeze filling device;

[0026] 3 - Detection module;

[0027] 31 - Second liquid level detection sensor; 32 - Exhaust pipe; 33 - L-shaped pipe;

[0028] 4 - Automatic infusion module;

[0029] 41 - Infusion route;

[0030] 411 - Second water pump; 412 - Second valve;

[0031] 42 - Reflux route;

[0032] 421 - First water pump; 422 - First valve;

[0033] 43 - First liquid level detection sensor;

[0034] 5 - Liquid storage tank;

[0035] 51 - High liquid level sensor; 52 - Low liquid level sensor;

[0036] 6 - Collection tray. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0038] Combined with Figure 1As shown in the figure, the present invention discloses an automatic filling device for fuel cell antifreeze, which includes a fuel cell engine 1 and an antifreeze filling device 2. The fuel cell engine 1 is connected to the antifreeze filling device 2. The antifreeze filling device 2 includes a detection module 3, an automatic infusion module 4, a liquid storage tank 5 and a collection tray 6. The detection module 3 and the automatic infusion module 4 are arranged horizontally in parallel and are respectively connected to the fuel cell engine 1 at one end. The other ends of the detection module 3 and the automatic infusion module 4 are both connected to the liquid storage tank 5. The detection module 3 is located above the automatic infusion module 4, and the collection tray 6 is arranged below the automatic infusion module 4.

[0039] The automatic infusion module 4 includes an infusion route 41, a reflux route 42 and a first liquid level detection sensor 43. One end of the reflux route 42 is connected to the infusion route 41 through the first liquid level detection sensor 43. The reflux route 42 is arranged in parallel with the infusion route 41 and is arranged below the infusion route 41. The reflux route 42 includes a first water pump 421 and a first valve 422. The first water pump 421 is connected to the first valve 422. The other end of the reflux route 42 is connected to the liquid storage tank 5. The infusion route 41 includes a second water pump 411 and a second valve 412. The second water pump 411 is connected to the second valve 412. The second valve 412 is connected to the fuel cell engine 1. The liquid storage tank 5 is connected to the fuel cell engine 1 through the second water pump 411 and the second valve 412.

[0040] The detection module 3 includes a second liquid level detection sensor 31 and an exhaust pipe 32. One end of the second liquid level detection sensor 31 is connected to the liquid storage tank 5. One end of the exhaust pipe 32 is arranged on the pipe connecting the second liquid level detection sensor 31 to the liquid storage tank 5, and the other end is in contact with the air. The other end of the second liquid level detection sensor 31 is connected to the fuel cell engine 1 through an L-shaped pipe 33. The L-shaped pipe 33 is arranged vertically. The connection between the detection module 3 and the fuel cell engine 1 is located above the connection between the automatic infusion module 4 and the fuel cell engine 1.

[0041] The L-shaped pipe 33 includes a horizontal axis and a vertical axis. The present invention adds a sliding mechanism on the basis of the original L-shaped pipe 33, which is fixed in cooperation with a locking mechanism and the detection module 3. Then, the fuel cell 1 and the detection module 3 are connected through a hose. The sliding mechanism is composed of several segments, and is fixed to the detection module 3 through segments at different heights on the sliding mechanism, realizing adjustable height in the vertical direction, and thus adapting to fuel cell engines 1 of various scales. The second liquid level detection sensor 31 is arranged on the section closest to the fuel cell engine.

[0042] A high liquid level sensor 51 and a low liquid level sensor 52 are arranged on the liquid storage tank 5. The high liquid level sensor 51 is arranged above the low liquid level sensor 52. The connection between the detection module 3 and the liquid storage tank 5 is higher than the high liquid level sensor 51.

[0043] The first water pump 421 and the second water pump 411 are corrosion-resistant diaphragm pumps, and the first valve 422 and the second valve 412 are electric ball valves.

[0044] The present invention also provides a method for automatically filling antifreeze for a fuel cell. The method for automatically filling antifreeze for a fuel cell is used for any one of the above-mentioned fuel cell antifreeze automatic filling devices, and includes:

[0045] S1: Start the fuel cell antifreeze automatic filling device. Connect the fuel cell engine 1 to the antifreeze filling device 2, and fill the antifreeze into the liquid storage tank 5 until the liquid level exceeds the high liquid level sensor 51, and the liquid storage tank 5 stops filling.

[0046] S2: Detect the liquid level of the fuel cell engine 1 through the second liquid level detection sensor 31, and detect whether there is liquid in the L-shaped pipe 33.

[0047] S3: When the second liquid level detection sensor 31 does not detect liquid in the L-shaped pipe 33, turn on the second water pump 411 and the second valve 412 on the infusion line 41, and the antifreeze in the liquid storage tank 5 is filled into the fuel cell engine 1 through the infusion line 41.

[0048] S4: When the second liquid level detection sensor 31 detects liquid in the L-shaped pipe 33, turn off the second water pump 411 and the second valve 412, stop filling the antifreeze into the fuel cell engine 1, and at the same time, detect the liquid in the infusion line 41 through the first liquid level detection sensor 43, and detect whether the return line 42 needs to be opened.

[0049] S5: When the first liquid level detection sensor 43 detects liquid on the infusion line 41, turn on the first water pump 421 and the first valve 422 on the return line 42, and return the antifreeze that has not been filled into the fuel cell engine 1 on the infusion line 41 to the liquid storage tank 5.

[0050] Further, the S1 includes: when the antifreeze in the liquid storage tank 5 is lower than the low liquid level sensor 52, the antifreeze filling device 2 starts to fill the antifreeze into the liquid storage tank 5.

[0051] The fuel cell antifreeze automatic filling device includes a fuel cell engine 1 and an antifreeze filling device 2. When using this device, the fuel cell engine 1 is connected to the antifreeze filling device 2. In the initial state, when the low-level sensor 52 detects that the liquid level of the antifreeze in the liquid storage tank 5 is lower than the low-level sensor 52, the device does not operate. The second liquid level detection sensor 31, the second water pump 411, the second valve 412, the first water pump 421, the first valve 422, and the first liquid level detection sensor 43 in the antifreeze filling device 2 are all in the closed state. By filling the liquid storage tank 5 with antifreeze until the high-level sensor 51 detects the antifreeze, the addition of antifreeze to the liquid storage tank 5 is stopped.

[0052] Then start the device. The antifreeze filling device 2 enters the filling state. The second liquid level detection sensor 31, the first water pump 421, the first valve 422, and the high-level sensor 51 in the antifreeze filling device 2 are in the closed state. The first liquid level detection sensor 43, the second water pump 411, the second valve 412, and the low-level sensor 52 are in the open state. The antifreeze in the liquid storage tank 5 is transported to the fuel cell engine 1 through the second water pump 411 and the second valve 412.

[0053] When the second liquid level detection sensor 31 detects that there is liquid in the L-shaped pipe 33, the second liquid level detection sensor 31 is turned on, and the antifreeze filling device 2 enters the reflux state. The low-level sensor 52, the first liquid level detection sensor 43, the first water pump 421, and the first valve 422 are in the open state. The second water pump 411 and the second valve 412 are in the closed state. The liquid remaining in the pipes on the infusion route 41 is recovered into the liquid storage tank 5 through the reflux route 42.

[0054] Finally, the antifreeze device enters the closed state. The low-level sensor 52 is in the open state. The first liquid level detection sensor 43, the second liquid level detection sensor 31, the high-level sensor 51, the first water pump 421, the first valve 422, the second water pump 411, and the second valve 412 are all in the closed state.

[0055] The fuel cell antifreeze automatic filling device provided by the present invention realizes the functions of automatic filling and extraction of antifreeze through the cooperation of the water pump and the liquid level detection sensor, can efficiently and safely complete related operations, and at the same time is designed with a reflux structure, combined with a collection tray, which can reduce liquid waste and achieve the purpose of saving antifreeze.

[0056] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. An automatic filling method for fuel cell antifreeze, characterized in that: Including: S1: Start the automatic filling device for fuel cell antifreeze. The automatic filling device for fuel cell antifreeze includes a fuel cell engine and an antifreeze filling device. The fuel cell engine is connected to the antifreeze filling device. The antifreeze filling device includes a detection module, an automatic infusion module, a liquid storage tank, and a collection tray. The automatic infusion module includes an infusion route and a reflux route. The automatic infusion module includes a first liquid level detection sensor. The reflux route includes a first water pump and a first valve. The infusion route includes a second water pump and a second valve. The detection module includes a second liquid level detection sensor. The second liquid level detection sensor is connected to the fuel cell engine through an L-shaped pipe, and the L-shaped pipe is arranged vertically. Add antifreeze to the liquid storage tank until the liquid level exceeds the high liquid level sensor, and the liquid storage tank stops adding. S2: Detect the liquid level of the fuel cell engine through the second liquid level detection sensor, and detect whether there is liquid in the L-shaped pipe. S3: When the second liquid level detection sensor does not detect liquid in the L-shaped pipe, turn on the second water pump and the second valve on the infusion route, and the antifreeze in the liquid storage tank is filled into the fuel cell engine through the infusion route. S4: When the second liquid level detection sensor detects liquid in the L-shaped pipe, turn off the second water pump and the second valve, stop filling the fuel cell engine with antifreeze, and at the same time detect the liquid in the infusion route through the first liquid level detection sensor, and detect whether the reflux route needs to be turned on. S5: When the first liquid level detection sensor detects liquid on the infusion route, turn on the first water pump and the first valve on the reflux route, and return the antifreeze that has not been filled into the fuel cell engine on the infusion route to the liquid storage tank.

2. The automatic filling method of the fuel cell antifreeze according to claim 1, characterized in that: The reflux route is connected to the infusion route through the first liquid level detection sensor, and the reflux route is arranged below the infusion route.

3. The automatic filling method of the fuel cell antifreeze according to claim 2, characterized in that: The first water pump is connected to the first valve, the second water pump is connected to the second valve, the second valve is connected to the fuel cell engine, and the liquid storage tank is connected to the fuel cell engine through the second water pump and the second valve.

4. The automatic filling method of the fuel cell antifreeze according to claim 1, characterized in that: It also includes an exhaust pipe. The exhaust pipe is arranged on the pipe connecting the second liquid level detection sensor and the liquid storage tank. The detection module is arranged above the automatic infusion module, and the connection part of the detection module and the fuel cell engine is above the connection part of the automatic infusion module and the fuel cell engine.

5. The automatic filling method of the fuel cell antifreeze according to claim 3, characterized in that: The first water pump and the second water pump are corrosion-resistant diaphragm pumps, and the first valve and the second valve are electric ball valves.

6. The automatic filling method of the fuel cell antifreeze according to claim 1, characterized in that: The liquid storage tank is provided with a high liquid level sensor and a low liquid level sensor. The high liquid level sensor is arranged above the low liquid level sensor, and the connection part of the detection module and the liquid storage tank is higher than the high liquid level sensor.

7. The automatic filling method of the fuel cell antifreeze according to claim 1, characterized in that: S1 includes: When the antifreeze in the liquid storage tank is lower than the low liquid level sensor, the antifreeze filling device starts to fill the antifreeze into the liquid storage tank.

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