Heat recovery system and fuel cell test bench

Abstract

The utility model relates to the technical field of battery processing equipment, in particular to a heat recovery system and a fuel cell test board. A heat recovery system includes: a fuel supply module for communicating with a fuel cell to supply fuel to the fuel cell; the oxidant supply module is used for being communicated with the fuel cell so as to supply an oxidant to the fuel cell; and the heat recovery module is used for absorbing heat released when the fuel reacts with the oxidant and transmitting the heat to at least one of the fuel supply module and the oxidant supply module. According to the heat recovery system, the cost can be reduced while energy consumption is reduced, and energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing equipment, and in particular to a heat recovery system and a fuel cell test bench. Background Art

[0002] The fuel cell test bench is a test platform used to test the various electrical properties of fuel cells when they are working. When testing the electrical properties of a fuel cell through the fuel cell test bench, it is necessary to introduce hydrogen and air into the fuel cell through a gas source to start the fuel cell working in order to test the various electrical properties of the fuel cell.

[0003] Since the air and hydrogen temperatures at the gas source are relatively low (usually around 25°C), and the fuel cell test bench has relatively high temperature requirements for the air and hydrogen entering the fuel cell (usually around 75°C). In order to meet the temperature requirements of the fuel cell test bench for air and hydrogen, it is necessary to set up additional electric heaters to heat the air and hydrogen to increase the temperature. However, setting up additional electric heaters will increase energy consumption, which is not energy-saving and environmentally friendly, and will also increase costs. Utility Model Content

[0004] The present application discloses a heat recovery system and a fuel cell test bench, which can reduce energy consumption, save energy and protect the environment while reducing costs.

[0005] In order to achieve the above objectives, in a first aspect, the present application discloses a heat recovery system, comprising:

[0006] a fuel supply module, the fuel supply module being used to communicate with the fuel cell to supply fuel to the fuel cell;

[0007] an oxidant supply module, the oxidant supply module being used to communicate with the fuel cell to supply the oxidant to the fuel cell;

[0008] A heat recovery module is used to absorb the heat released when the fuel reacts with the oxidant and transfer the heat to at least one of the fuel supply module and the oxidant supply module.

[0009] Optionally, the heat recovery module comprises:

[0010] A circulation pipeline, wherein the inlet and outlet ends of the circulation pipeline are both used to be connected to the cooling chamber, and a circulating medium is arranged in the circulation pipeline;

[0011] a first heat exchanger, the first heat exchanger being connected to the circulation pipeline;

[0012] A power component is connected to the circulation pipeline and is used to drive the circulation medium to circulate between the cooling chamber and the circulation pipeline. The circulation medium is used to absorb the heat released when the fuel reacts with the oxidant when flowing through the cooling chamber, and transfer the heat to the fuel supply module through the first heat exchanger when flowing through the first heat exchanger.

[0013] Optionally, the heat recovery module further includes:

[0014] A second heat exchanger is connected to the circulation pipeline, and the circulating medium is also used to transfer the heat to the oxidant supply module through the second heat exchanger when flowing through the second heat exchanger.

[0015] Optionally, the heat recovery module further includes a third heat exchanger, which is connected to the circulation pipeline and is located downstream of the second heat exchanger and the first heat exchanger;

[0016] The heat recovery system further includes a cooling module, and the cooling module is used to absorb heat at the third heat exchanger.

[0017] Optionally, the cooling module comprises:

[0018] a first cooling pipeline, one end of which is used for cooling medium to enter, and the other end of which is connected to the third heat exchanger;

[0019] A second cooling pipeline, one end of which is connected to the third heat exchanger and the other end of which is used for discharging the cooling medium.

[0020] Optionally, the cooling module also includes a first three-way diverter valve, the first interface and the second interface of the first three-way diverter valve are respectively connected to the first cooling pipeline, the third interface of the first three-way diverter valve is connected to the second cooling pipeline, and a first temperature detection element is connected to the circulation pipeline, and the first temperature detection element is located downstream of the third heat exchanger.

[0021] Optionally:

[0022] The circulation pipeline is connected with a flow metering element;

[0023] and / or,

[0024] The circulation pipeline is connected with a first heating element, and the first heating element is located downstream of the third heat exchanger or upstream of the first heat exchanger and the second heat exchanger;

[0025] and / or,

[0026] The circulation pipeline is connected with a storage box.

[0027] Optionally, the fuel supply module comprises:

[0028] a first fuel pipeline, one end of which is used to communicate with a fuel supply source and the other end of which is used to communicate with the first heat exchanger;

[0029] a second fuel pipeline, one end of which is in communication with the first heat exchanger and the other end of which is in communication with the fuel cell;

[0030] a second three-way flow divider valve, wherein the first interface and the second interface of the second three-way flow divider valve are respectively connected to the first fuel pipeline, and the third interface of the second three-way flow divider valve is connected to the second fuel pipeline;

[0031] A second temperature detection element is connected to the second fuel pipeline and is located downstream of the third interface of the second three-way diverter valve.

[0032] Optionally, a second heating element is connected to the second fuel pipeline, and the second heating element is located downstream of the third interface of the second three-way diverter valve and upstream of the second temperature detection element.

[0033] Optionally, the oxidant supply module comprises:

[0034] a first oxidant pipeline, one end of which is used to communicate with an oxidant supply source, and the other end of which is used to communicate with the second heat exchanger;

[0035] a second oxidant pipeline, one end of which is in communication with the second heat exchanger and the other end of which is in communication with the fuel cell;

[0036] a third three-way diverter valve, wherein the first interface and the second interface of the third three-way diverter valve are respectively connected to the first oxidant pipeline, and the third interface of the third three-way diverter valve is connected to the second oxidant pipeline;

[0037] A third temperature detection element is connected to the second oxidant pipeline and is located downstream of the third interface of the third three-way diverter valve.

[0038] Optionally, a third heating element is further connected to the second oxidant pipeline, and the third heating element is located downstream of the third three-way diverter valve and upstream of the third temperature detection element.

[0039] In a second aspect, the present application discloses a fuel cell test bench, comprising the heat recovery system described in any one of the first aspects above.

[0040] Compared with the prior art, the beneficial effects of this application are:

[0041] In the present application, by allowing the heat recovery module to absorb the heat released when the fuel and the oxidant react, and transferring the heat to at least one of the fuel supply module and the oxidant supply module, the temperature of the fuel cell can be lowered while at the same time increasing the temperature of at least one of the fuel and the oxidant. Therefore, to a certain extent, the situation in which the temperature of the fuel cell is too high or the temperature of the fuel and the oxidant are too low can be avoided, thereby ensuring the normal operation of the fuel cell.

[0042] Since the heat released when the fuel and the oxidant react can be transferred to at least one of the fuel supply module and the oxidant supply module through the heat recovery module, at least one of the fuel and the oxidant can be heated. That is, the heat used to heat the fuel and the oxidant is provided by the heat released when the fuel and the oxidant react, and there is no need to set up an additional electric heater specifically for heating the fuel and the oxidant. Therefore, it is possible to reduce energy consumption, save energy and protect the environment while reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0044] Figure 1 It is a structural principle diagram of the first heat recovery system provided in the embodiment of the present application;

[0045] Figure 2 is a structural principle diagram of a second heat recovery system provided in an embodiment of the present application;

[0046] Figure 3 is a structural principle diagram of a third heat recovery system provided in an embodiment of the present application;

[0047] Figure 4 is a structural principle diagram of a fourth heat recovery system provided in an embodiment of the present application;

[0048] Figure 5 is a structural principle diagram of a fifth heat recovery system provided in an embodiment of the present application;

[0049] Figure 6 is a flow chart of a heat recovery method provided in an embodiment of the present application;

[0050] Figure 7is a flow chart of another heat recovery method provided in an embodiment of the present application;

[0051] Figure 8 It is a structural schematic diagram of a fuel cell test bench provided in an embodiment of the present application.

[0052] Description of main reference numerals

[0053] 1- fuel supply module; 11- first fuel pipeline; 12- second fuel pipeline; 121- second heating element; 13- second three-way diverter valve; 14- second temperature detection element;

[0054] 2-oxidant supply module; 21-first oxidant pipeline; 22-second oxidant pipeline; 221-third heating element; 23-third three-way diverter valve; 24-third temperature detection element;

[0055] 3-heat recovery module; 31-cooling chamber; 32-circulation pipeline; 321-inlet end; 322-outlet end; 323-first temperature detection element; 324-first heating element; 325-flow metering element; 326-storage box; 33-first heat exchanger; 34-power part; 35-second heat exchanger; 36-third heat exchanger;

[0056] 4-cooling module; 41-first cooling pipeline; 42-second cooling pipeline; 43-first three-way diverter valve;

[0057] 5- Tail exhaust module;

[0058] 6- Comprehensive processing module;

[0059] 100-heat recovery system; 200-fuel cell test bench;

[0060] A-fuel cell; B-fuel supply source; C-oxidant supply source. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0062] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0063] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0064] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0065] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0066] The technical solution of the present application will be further described below in conjunction with specific embodiments and drawings.

[0067] See also Figure 1 The heat recovery system 100 includes: a fuel supply module 1 ( Figure 1 The dotted line part), oxidant supply module 2 and heat recovery module 3 ( Figure 1 The fuel supply module 1 is used to communicate with the fuel cell A to supply fuel to the fuel cell A, the oxidant supply module 2 is used to communicate with the fuel cell A to supply oxidant to the fuel cell A, and the heat recovery module 3 is used to absorb the heat released when the fuel and the oxidant react and transfer the heat to at least one of the fuel supply module 1 and the oxidant supply module 2.

[0068] In the present embodiment, since the fuel supply module 1 and the oxidant supply module 2 can be connected to the fuel cell A respectively, after the fuel supply module 1 and the oxidant supply module 2 are connected to the fuel cell A respectively, the fuel and the oxidant can be supplied to the fuel cell A respectively through the fuel supply module 1 and the oxidant supply module 2. After the fuel and the oxidant enter the fuel cell A, a reaction can occur between the fuel and the oxidant, and chemical energy can be converted into electrical energy during the reaction process, thereby enabling the fuel cell A to have electrical energy.

[0069] Among them, since the fuel and the oxidant release heat during the reaction, as the heat accumulates, the temperature of the fuel cell A will be too high, which may affect the normal operation of the fuel cell A. At the same time, when the temperature of the fuel supplied by the fuel supply module 1 to the fuel cell A and the temperature of the oxidant supplied by the oxidant supply module 2 to the fuel cell A are too low, the normal operation of the fuel cell A will also be affected.

[0070] Based on this, the heat recovery system 100 can reduce the temperature of the fuel cell A while increasing the temperature of at least one of the fuel and the oxidant by allowing the heat recovery module 3 to absorb the heat released when the fuel and the oxidant react, and transfer the heat to at least one of the fuel supply module 1 and the oxidant supply module 2. Therefore, it can avoid the situation where the temperature of the fuel cell A is too high or the temperature of the fuel and the oxidant is too low to a certain extent, thereby ensuring the normal operation of the fuel cell A.

[0071] It is worth noting that the heat released when the fuel and the oxidant react can be transferred to at least one of the fuel supply module 1 and the oxidant supply module 2 through the heat recovery module 3 to heat at least one of the fuel and the oxidant. That is, the heat used to heat the fuel and the oxidant is provided by the heat released when the fuel and the oxidant react, and there is no need to set up an additional electric heater specifically for heating the fuel and the oxidant. Therefore, it is possible to reduce energy consumption, save energy and protect the environment while reducing costs.

[0072] The fuel may be hydrogen or any other substance that can be used as fuel, and this embodiment does not limit the fuel. The oxidant may be air, oxygen, or any substance that can react with the fuel and be converted into electrical energy, and this embodiment does not limit the oxidant.

[0073] In some embodiments, see Figure 1The heat recovery module 3 includes: a circulation pipeline 32, a first heat exchanger 33 and a power component 34, wherein the inlet end 321 and the outlet end 322 of the circulation pipeline 32 are both used to connect to the cooling chamber 31 of the fuel cell A, a circulation medium is arranged in the circulation pipeline 32, the first heat exchanger 33 is connected to the circulation pipeline 32, the power component 34 is connected to the circulation pipeline 32, and is used to drive the circulation medium to circulate between the cooling chamber 31 and the circulation pipeline 32, and the circulation medium is used to absorb the heat released when the fuel reacts with the oxidant when flowing through the cooling chamber 31, and transfer the heat to the fuel supply module 1 through the first heat exchanger 33 when flowing through the first heat exchanger 33.

[0074] In this embodiment, since the inlet end 321 and the outlet end 322 of the circulation pipeline 32 are both connected to the cooling chamber 31, a circulating medium is arranged in the circulation pipeline 32, and the power component 34 and the first heat exchanger 33 are both connected to the circulation pipeline 32, the circulating medium can be driven by the power component 34 to circulate between the cooling chamber 31 and the circulation pipeline 32. When the circulating medium flows through the cooling chamber 31 of the fuel cell A, the heat released when the fuel and the oxidant react at the fuel cell A can be absorbed by the circulating medium, so that the temperature at the fuel cell A is reduced. When the circulating medium carries heat and flows through the first heat exchanger 33, the heat can be transferred to the fuel supply module 1 through the first heat exchanger 33 to heat the fuel, which can increase the temperature of the fuel and reduce the temperature of the circulating medium.

[0075] After the temperature of the circulating medium is lowered, when the power component 34 drives the circulating medium to flow through the cooling chamber 31 again, the circulating medium can cool down the fuel cell A again by absorbing the heat released when the fuel reacts with the oxidant at the fuel cell A, and heat the fuel again when flowing through the first heat exchanger 33, and the cycle continues.

[0076] It can be seen that by allowing the circulating medium to circulate between the cooling chamber 31 and the circulating pipeline 32, when the circulating medium flows through the cooling chamber 31, the circulating medium can play a role similar to a refrigerant to cool the fuel cell A, and when the circulating medium flows through the first heat exchanger 33, the circulating medium can play a role similar to a heating agent to heat the fuel. When the circulating medium flows through the cooling chamber 31, it can reduce the temperature of the fuel cell A while also raising the temperature of the circulating medium itself, which is convenient for subsequent heating of the fuel. When the circulating medium flows through the first heat exchanger 33, it can increase the temperature of the fuel while also lowering the temperature of the circulating medium itself, which is convenient for subsequent cooling of the fuel cell A. During the flow of the circulating medium, the circulating medium can be recycled, and can achieve the function of heating the fuel while achieving the cooling of the fuel cell A. Therefore, one thing has multiple uses, and the structural design is very clever, which can reduce the cost of the heat recovery system.

[0077] The power member 34 may be a water pump or any other device capable of driving the circulating medium to circulate between the cooling chamber 31 and the circulating pipeline 32. The present embodiment does not limit the power member 34. The circulating pipeline 32 may be a rubber tube, a plastic tube or a steel tube, etc., and the present embodiment does not limit the circulating pipeline 32.

[0078] The above-mentioned circulating medium can be water or other possible media. When the circulating medium is water, it can be deionized water. When the circulating medium is deionized water, the inventor has found through long-term research that, on the one hand, it can reduce the corrosion of the circulating pipeline 32, making the circulating pipeline 32 more durable. On the other hand, it can also reduce the risk of the circulating pipeline 32 being blocked.

[0079] It should be noted that the inlet end 321 of the circulation pipeline 32 is: taking the circulation pipeline 32 as the research object, the end for the circulation medium to flow from the cooling chamber 31 into the circulation pipeline 32 is the inlet end 321 of the circulation pipeline 32. The outlet end 322 of the circulation pipeline 32 is: the end for the circulation medium to flow out of the circulation pipeline 32 is the outlet end 322 of the circulation pipeline 32.

[0080] In some embodiments, see Figure 1 The heat recovery module 3 further includes: a second heat exchanger 35 , which is connected to the circulation pipeline 32 , and the circulating medium is also used to transfer heat to the oxidant supply module 2 through the second heat exchanger 35 when flowing through the second heat exchanger 35 .

[0081] By setting up the second heat exchanger 35, heat can also be transferred to the oxidant supply module 2 through the second heat exchanger 35, which can heat the oxidant, so that the temperature of the oxidant can meet the temperature requirements, thereby better ensuring that the fuel cell A can work normally.

[0082] Based on the above description, it can be known that the circulating medium circulates between the cooling chamber 31 and the circulating pipeline 32. When the circulating medium flows through the cooling chamber 31, it can absorb heat, so that the temperature of the circulating medium increases, which is convenient for the subsequent heating of the fuel and the oxidant. When the circulating medium flows through the circulating pipeline 32, it can release heat to the outside through the first heat exchanger 33 and the second heat exchanger 35 connected to the circulating pipeline 32, so that the temperature of the circulating medium decreases, which is convenient for the subsequent cooling of the fuel cell A.

[0083] Although the circulating medium can release heat to the outside through the first heat exchanger 33 and the second heat exchanger 35 connected to the circulating pipe 32 when flowing through the circulating pipe 32, so that the temperature is reduced, which is convenient for cooling the fuel cell A later, there is a situation where the heat released to the outside at the first heat exchanger 33 and the second heat exchanger 35 is not enough, resulting in the temperature of the circulating medium not being low enough, and then the circulating medium cannot cool the fuel cell A well when flowing through the cooling chamber 31. In order to avoid this situation, in some embodiments, see Figure 2 The heat recovery module 3 also includes a third heat exchanger 36, which is connected to the circulation pipeline 32 and is located downstream of the second heat exchanger 35 and the first heat exchanger 33. The heat recovery system also includes a cooling module 4, which is used to absorb heat at the third heat exchanger 36.

[0084] Since the third heat exchanger 36 is located downstream of the second heat exchanger 35 and the first heat exchanger 33, after the circulating medium flows through the first heat exchanger 33 and the second heat exchanger 35 to reach the third heat exchanger 36, the cooling module 4 can absorb the heat at the third heat exchanger 36 to cool the circulating medium flowing through the third heat exchanger 36, so that the temperature of the circulating medium can be lower when it subsequently flows into the cooling chamber 31, thereby achieving a better cooling purpose for the fuel cell A.

[0085] There are many ways to implement the cooling module 4. It only needs to absorb the heat at the third heat exchanger 36 and cool the circulating medium flowing through the third heat exchanger 36. This embodiment does not limit this. In a first possible implementation, the cooling module 4 can be a cooling fan. In a second possible implementation, see Figure 2 The cooling module 4 includes: a first cooling pipeline 41 and a second cooling pipeline 42, wherein one end of the first cooling pipeline 41 is used for the cooling medium to enter, and the other end is connected to the third heat exchanger 36, and one end of the second cooling pipeline 42 is connected to the third heat exchanger 36, and the other end is used for the cooling medium to be discharged.

[0086] With such arrangement, the cooling medium can enter the third heat exchanger 36 through the first cooling pipeline 41 and be discharged through the second cooling pipeline 42. When flowing through the third heat exchanger 36, the cooling medium can absorb the heat at the third heat exchanger 36, thereby playing the role of cooling the circulating medium flowing through the third heat exchanger 36.

[0087] By connecting the first cooling pipeline 41 and the second cooling pipeline 42 to the third heat exchanger 36, injecting cooling medium into the third heat exchanger 36 through the first cooling pipeline 41, and discharging the cooling medium from the third heat exchanger 36 through the second cooling pipeline 42, the heat at the third heat exchanger 36 can be absorbed during the flow of the cooling medium. The principle is simple, and the cost of the cooling module 4 can be reduced while ensuring the reliability of the operation of the cooling module 4.

[0088] It should be noted that the cooling medium may be water. Of course, the cooling medium may also be a cooling liquid, etc. This embodiment does not limit the cooling medium.

[0089] It should also be noted that the third heat exchanger 36 is located downstream of the second heat exchanger 35 and the first heat exchanger 33, which means that when the circulating medium enters from the inlet end 321 of the circulating pipeline 32 and flows out from the outlet end 322 of the circulating pipeline 32, the circulating medium will first flow through the second heat exchanger 35 and the first heat exchanger 33, and then flow through the third heat exchanger 36. That is, the upstream and downstream of a certain element are defined based on the flow order of the circulating medium, and the upstream and downstream involved in the following text can be understood with reference to this explanation. When the upstream and downstream appear in the following text, their meanings will not be repeated in this embodiment.

[0090] In order to cool the temperature of the circulating medium to a suitable temperature through the cooling module 4, neither too high nor too low, in some embodiments, see Figure 3 The cooling module 4 also includes a first three-way diverter valve 43, the first interface and the second interface of the first three-way diverter valve 43 are respectively connected to the first cooling pipeline 41, the third interface of the first three-way diverter valve 43 is connected to the second cooling pipeline 42, and the circulation pipeline 32 is connected to a first temperature detection element 323, and the first temperature detection element 323 is located downstream of the third heat exchanger 36.

[0091] Since the first temperature detection element 323 is located downstream of the third heat exchanger 36, the temperature of the circulating medium can be detected by the first temperature detection element 323 after the circulating medium flows through the third heat exchanger 36 and before entering the cooling chamber 31. When the first temperature detection element 323 detects that the temperature of the circulating medium is too high, since the first interface and the second interface of the first three-way diverter valve 43 are respectively connected to the first cooling pipeline 41, and the third interface of the first three-way diverter valve 43 is connected to the second cooling pipeline 42, the opening of the third interface of the first three-way diverter valve 43 can be reduced, and the openings of the first interface and the second interface of the first three-way diverter valve 43 can be increased, so that the cooling medium can flow through the third heat exchanger 36 in large quantities. In this way, the cooling medium can absorb more heat from the circulating medium through the third heat exchanger 36, so that the temperature of the circulating medium gradually decreases, thereby avoiding the occurrence of excessive temperature of the circulating medium.

[0092] When the first temperature detection element 323 detects that the temperature of the circulating medium is too low, the opening of the third interface of the first three-way diverter valve 43 can be increased, and the openings of the first interface and the second interface of the first three-way diverter valve 43 can be decreased, so that the amount of cooling medium flowing through the third heat exchanger 36 is smaller. In this way, the cooling medium can absorb less heat from the circulating medium through the third heat exchanger 36, so that the temperature of the circulating medium gradually increases, thereby avoiding the situation where the temperature of the circulating medium is too low.

[0093] It can be seen that by making the first interface and the second interface of the first three-way diverter valve 43 connected to the first cooling pipeline 41 respectively, the third interface of the first three-way diverter valve 43 is connected to the second cooling pipeline 42, and the circulation pipeline 32 is connected with the first temperature detection element 323, the temperature of the circulating medium can be well controlled at an appropriate temperature, thereby effectively avoiding the situation where the temperature of the circulating medium is too high or too low.

[0094] The first temperature detection element 323 may be a temperature sensor or any other component capable of detecting the temperature of the circulating medium. The first temperature detection element 323 is not limited in this embodiment.

[0095] In order to prevent the circulating medium from being too cold when passing through the first heat exchanger 33 and the second heat exchanger 35, so that the fuel and the oxidant cannot be heated well, in some embodiments, see Figure 4 A first heating element 324 is connected to the circulation pipeline 32 , and the first heating element 324 is located upstream of the first heat exchanger 33 and the second heat exchanger 35 .

[0096] By locating the first heating element 324 upstream of the first heat exchanger 33 and the second heat exchanger 35, the circulating medium can be heated in advance before the circulating medium flows through the first heat exchanger 33 and the second heat exchanger 35, thereby increasing the temperature of the circulating medium, thereby avoiding the situation where the temperature of the circulating medium is too low and the fuel and the oxidant cannot be heated well.

[0097] The first heating element 324 may be an electric heating rod or an electric heating wire, etc., and this embodiment does not limit the first heating element 324 .

[0098] In order to prevent the circulating medium from having a too low temperature after passing through the third heat exchanger 36, resulting in the circulating medium entering the cooling chamber 31 having a too low temperature, in some embodiments, see Figure 5 , the first heating element 324 is located downstream of the third heat exchanger 36 .

[0099] By locating the first heating element 324 downstream of the third heat exchanger 36 , the circulating medium can be heated in time when the temperature of the circulating medium is too low after flowing through the third heat exchanger 36 , thereby preventing the circulating medium from being too low in temperature.

[0100] In some embodiments, see Figure 5 , a flow metering element 325 is connected to the circulation pipeline 32. By connecting the flow metering element 325 to the circulation pipeline 32, the flow metering element 325 can measure the amount of the circulation medium flowing through the circulation pipeline 32, thereby making the circulation medium flowing through the circulation pipeline 32 quantifiable. When the amount of the circulation medium flowing through the circulation pipeline 32 is too large or too small, the amount of the circulation medium flowing through the circulation pipeline 32 can be adjusted by adjusting the power of the power member 34, thereby making the heat recovery system more controllable.

[0101] The flow metering element 325 may be a flow meter or any component capable of measuring the amount of the circulating medium flowing through the circulation pipeline 32 . The present embodiment does not limit the flow metering element 325 .

[0102] In order to store the circulating medium in the circulating line 32, in some embodiments, see Figure 5 The circulation pipeline 32 is connected to a storage box 326 .

[0103] By connecting the storage box 326 to the circulation pipeline 32, on the one hand, when it is not necessary to work, the circulating medium in the circulation pipeline 32 can be stored in the storage box 326. On the other hand, in the working state, the circulating medium in the storage box 326 can replenish the circulation pipeline 32 in time, which can avoid the intermittent circulation of the circulating medium in the circulation pipeline 32, and thus the heat recovery system 100 can better transfer heat from the cooling chamber 31 to the first heat exchanger 33 and the second heat exchanger 35, so that the heat recovery system 100 can better cool the fuel cell A and heat the fuel and the oxidant.

[0104] In order to prevent the residual gas in the fuel cell A from polluting the environment after being discharged from the fuel cell A, in some embodiments, see Figure 5 The heat recovery system 100 also includes a tail exhaust module 5, so that the residual gas discharged from the fuel cell A can be well recovered through the tail exhaust module 5, thereby preventing the residual gas in the fuel cell A from polluting the environment after being discharged from the fuel cell A.

[0105] Among them, the tail exhaust module 5 can be a gas purifier, a gas storage tank or any other device that can process or store residual gas in the fuel cell A. This embodiment does not limit the tail exhaust module 5.

[0106] In some embodiments, see Figure 5 The fuel supply module 1 includes: a first fuel pipeline 11, a second fuel pipeline 12, a second three-way diverter valve 13 and a second temperature detection element 14, wherein one end of the first fuel pipeline 11 is used to communicate with the fuel supply source B, and the other end is connected to the first heat exchanger 33, one end of the second fuel pipeline 12 is connected to the first heat exchanger 33, and the other end is used to communicate with the fuel cell A, the first interface and the second interface of the second three-way diverter valve 13 are respectively connected to the first fuel pipeline 11, the third interface of the second three-way diverter valve 13 is connected to the second fuel pipeline 12, and the second temperature detection element 14 is connected to the second fuel pipeline 12 and is located downstream of the third interface of the second three-way diverter valve 13.

[0107] Since the first interface and the second interface of the second three-way diverter valve 13 are respectively connected to the first fuel pipeline 11, the third interface of the second three-way diverter valve 13 is connected to the second fuel pipeline 12, and the second temperature detection element 14 is connected to the second fuel pipeline 12 and is located downstream of the third interface of the second three-way diverter valve 13, when the second temperature detection element 14 detects that the temperature of the fuel flowing through the first heat exchanger 33 is too low, the opening of the third interface of the second three-way diverter valve 13 can be reduced, and the openings of the first interface and the second interface of the second three-way diverter valve 13 can be increased, so that a large amount of fuel can flow through the first heat exchanger 33. In this way, the fuel can absorb more heat from the circulating medium through the first heat exchanger 33, so that the temperature of the fuel increases, thereby avoiding the occurrence of the fuel temperature being too low.

[0108] When the second temperature detection element 14 detects that the temperature of the fuel flowing through the first heat exchanger 33 is too high, the opening of the third interface of the second three-way diverter valve 13 can be increased, and the openings of the first interface and the second interface of the second three-way diverter valve 13 can be reduced, so that the amount of fuel flowing through the first heat exchanger 33 is reduced, and a part of the fuel flows directly to the second fuel pipeline 12 through the third interface of the second three-way diverter valve 13. In this way, the fuel can absorb less heat from the circulating medium through the first heat exchanger 33, so that the temperature of the fuel is reduced, thereby avoiding the occurrence of excessive fuel temperature.

[0109] It can be seen that by providing the second three-way diverter valve 13 and the second temperature detection element 14, the fuel temperature can be controlled very flexibly by adjusting the opening of each interface in the second three-way diverter valve 13, making the heat recovery system more flexible.

[0110] The structure of the second temperature detection element 14 may be the same as that of the first temperature detection element 323 . For details, please refer to the description of the first temperature detection element 323 in the above implementation. The second temperature detection element 14 will not be described in detail in this embodiment.

[0111] In some embodiments, see Figure 5 The second fuel pipeline 12 is connected to a second heating element 121 , and the second heating element 121 is located downstream of the third interface of the second three-way diverter valve 13 and upstream of the second temperature detection element 14 .

[0112] By setting the second heating element 121, on the one hand, when the temperature of the fuel still does not rise to a qualified level after reducing the opening of the third interface of the second three-way diverter valve 13 and increasing the opening of the first interface and the second interface of the second three-way diverter valve 13, the fuel can be heated by the second heating element 121, thereby better ensuring that the temperature of the fuel can be raised to a qualified temperature. On the other hand, when the fuel cell A is just about to start working, since there is no heat at the fuel cell A for the heat recovery module 3 to absorb and transfer to the fuel supply module 1, the temperature of the fuel can be increased mainly by heating the fuel with the second heating element 121, thereby avoiding the situation where the temperature of the fuel is too low when the fuel cell A is just about to start working.

[0113] The structure of the second heating element 121 may be the same as or similar to that of the first heating element 324 . For details, reference may be made to the description of the first heating element 324 in the above embodiment, which will not be described in detail in this embodiment.

[0114] In some embodiments, see Figure 5 The oxidant supply module 2 includes: a first oxidant pipeline 21, a second oxidant pipeline 22, a third three-way diverter valve 23 and a third temperature detection element 24, wherein one end of the first oxidant pipeline 21 is used to communicate with the oxidant supply source C, and the other end is connected to the second heat exchanger 35, one end of the second oxidant pipeline 22 is connected to the second heat exchanger 35, and the other end is used to communicate with the fuel cell A, the first interface and the second interface of the third three-way diverter valve 23 are respectively connected to the first oxidant pipeline 21, the third interface of the third three-way diverter valve 23 is connected to the second oxidant pipeline 22, and the third temperature detection element 24 is connected to the second oxidant pipeline 22 and is located downstream of the third interface of the third three-way diverter valve 23.

[0115] Since the first interface and the second interface of the third three-way diverter valve 23 are respectively connected to the first oxidant pipeline 21, the third interface of the third three-way diverter valve 23 is connected to the second oxidant pipeline 22, and the third temperature detection element 24 is connected to the second oxidant pipeline 22 and is located downstream of the third interface of the third three-way diverter valve 23, when the third temperature detection element 24 detects that the temperature of the oxidant flowing through the second heat exchanger 35 is too low, the opening of the third interface of the third three-way diverter valve 23 can be reduced, and the openings of the first interface and the second interface of the third three-way diverter valve 23 can be increased, so that the oxidant can flow through the second heat exchanger 35 in large quantities. In this way, the oxidant can absorb more heat from the circulating medium through the second heat exchanger 35, so that the temperature of the oxidant increases, thereby avoiding the occurrence of the oxidant temperature being too low.

[0116] When the third temperature detection element 24 detects that the temperature of the oxidant flowing through the second heat exchanger 35 is too high, the opening of the third interface of the third three-way diverter valve 23 can be increased, and the openings of the first interface and the second interface of the third three-way diverter valve 23 can be reduced, so that the amount of oxidant flowing through the second heat exchanger 35 is reduced, and a part of the oxidant flows directly to the second oxidant pipeline 22 through the third interface of the third three-way diverter valve 23. In this way, the oxidant can absorb less heat from the circulating medium through the second heat exchanger 35, so that the temperature of the oxidant is reduced, thereby avoiding the occurrence of excessive temperature of the oxidant.

[0117] It can be seen that by providing the third three-way diverter valve 23 and the third temperature detection element 24, the oxidant temperature can be flexibly controlled by adjusting the opening of each interface in the third three-way diverter valve 23, making the heat recovery system more flexible.

[0118] The structure of the third temperature detection element 24 may be the same as that of the first temperature detection element 323 . For details, please refer to the description of the first temperature detection element 323 in the above implementation. The third temperature detection element 24 will not be described in detail in this embodiment.

[0119] In some embodiments, see Figure 5 The second oxidant pipeline 22 is also connected to a third heating element 221 . The third heating element 221 is located downstream of the third three-way diverter valve 23 and upstream of the third temperature detection element 24 .

[0120] By setting the third heating element 221, on the one hand, when the temperature of the oxidant still does not rise to a qualified level after the opening of the third interface of the third three-way diverter valve 23 is reduced and the opening of the first interface and the second interface of the third three-way diverter valve 23 is increased, the oxidant can be heated by the third heating element 221, thereby better ensuring that the temperature of the oxidant can be raised to a qualified temperature. On the other hand, when the fuel cell A is just about to start working, since there is no heat at the fuel cell A for the heat recovery module 3 to absorb and transfer to the oxidant supply module 2, the temperature of the oxidant can be mainly increased by heating the oxidant by the third heating element 221, thereby avoiding the situation where the temperature of the oxidant is too low when the fuel cell A is just about to start working.

[0121] The structure of the third heating element 221 may be the same as or similar to that of the first heating element 324 . For details, reference may be made to the description of the first heating element 324 in the above embodiment, which will not be described in detail in this embodiment.

[0122] In order to ensure that the humidity, pressure and flow rate of the fuel and oxidant entering the fuel cell A meet the requirements, in some embodiments, see Figure 5The second fuel pipeline 12 and the second oxidant pipeline 22 may be respectively provided with an integrated processing module 6, and the integrated processing module 6 is used to respectively adjust the humidity, pressure and flow of the fuel flowing through the integrated processing module 6, and the humidity, pressure and flow of the oxidant, so that the humidity, pressure and flow of the fuel and the oxidant can meet the requirements, thereby better ensuring that the fuel cell A can work normally.

[0123] Specifically, the integrated processing module 6 may include a spray tank, a pressure regulating pump and a flow control valve, wherein the humidity of the fuel and the oxidant can be adjusted by the spray tank, the pressure of the fuel and the oxidant can be adjusted by the pressure regulating pump, and the flow rate of the fuel and the oxidant can be adjusted by the flow control valve.

[0124] This application also provides a heat recovery method, see Figure 5 and Figure 6 The heat recovery method can be executed in any of the heat recovery systems in the above embodiments, including:

[0125] Step 601: Acquire a first actual temperature detected by the second temperature detection element 14 .

[0126] Step 602: Determine whether the first actual temperature is within the first preset temperature range according to the first actual temperature and the first preset temperature range.

[0127] Step 603: When the first actual temperature exceeds the first preset temperature range, the second three-way diverter valve 13 is controlled to adjust the opening of the interface of the second three-way diverter valve 13 so that the first actual temperature is within the first preset temperature range.

[0128] In this embodiment, when the fuel supply module 1 supplies fuel to the fuel cell A, first, the first actual temperature of the fuel can be detected by the second temperature detection element 14. After the second temperature detection element 14 detects the first actual temperature of the fuel, the controller of the heat recovery system 100 can obtain the first actual temperature, and after obtaining the first actual temperature, the first actual temperature can be compared with the first preset temperature to determine whether the first actual temperature is within the first preset temperature range. When the first actual temperature exceeds the first preset temperature range, it can be considered that the temperature of the fuel is unqualified. At this time, the controller can control the second three-way diverter valve 13 to adjust the opening of its own interface so that the amount of fuel flowing through the first heat exchanger 33 can change, and then the heat absorbed by the fuel from the circulating medium through the first heat exchanger 33 can change to adjust the temperature of the fuel until the first actual temperature is within the first preset temperature range. When the first actual temperature is within the first preset temperature range, the normal operation of the fuel cell A can be well guaranteed.

[0129] Optionally, when the first actual temperature exceeds the first preset temperature range, controlling the second three-way diverter valve 13 to adjust the opening of the interface of the second three-way diverter valve 13 includes:

[0130] When the first actual temperature is greater than the highest temperature in the first preset temperature range, the second three-way diverter valve 13 is controlled to increase the opening of the third interface of the second three-way diverter valve 13 and decrease the openings of the first interface and the second interface of the second three-way diverter valve 13, so that the first actual temperature is within the first preset temperature range;

[0131] When the first actual temperature is lower than the lowest temperature in the first preset temperature range, the second three-way diverter valve 13 is controlled to reduce the opening of the third interface of the second three-way diverter valve 13 and increase the opening of the first interface and the second interface of the second three-way diverter valve 13 so that the first actual temperature is within the first preset temperature range.

[0132] Optionally, when the first actual temperature is less than the lowest temperature in the first preset temperature range, the method further includes:

[0133] The second heating element 121 is controlled to start heating.

[0134] Optionally, the method further comprises:

[0135] Acquire a second actual temperature of the first temperature detection element 323;

[0136] Determining whether the second actual temperature is within the second preset temperature range according to the second actual temperature and the second preset temperature range;

[0137] When the second actual temperature is greater than the highest temperature in the second preset temperature range, the first three-way diverter valve 43 is controlled to reduce the opening of the third interface of the first three-way diverter valve 43 and increase the opening of the first interface and the second interface of the first three-way diverter valve 43;

[0138] When the second actual temperature is lower than the lowest temperature in the second preset temperature range, the first three-way diverter valve 43 is controlled to increase the opening of the third interface of the first three-way diverter valve 43 and decrease the opening of the first interface and the second interface of the first three-way diverter valve 43.

[0139] All the above optional technical solutions can be combined in any way to form optional embodiments of the present application, and the embodiments of the present application will not be described in detail one by one.

[0140] Figure 7 This is another heat recovery method flow chart provided in the embodiment of the present application, see Figure 7 , the heat recovery method comprises:

[0141] Step 701: Acquire a first actual temperature detected by the second temperature detection element 14 .

[0142] First, the first actual temperature of the fuel may be detected by the second temperature detection element 14 , and then, the controller of the heat recovery system 100 may obtain the first actual temperature from the second temperature detection element 14 .

[0143] Step 702: Determine whether the first actual temperature is within the first preset temperature range according to the first actual temperature and the first preset temperature range.

[0144] Specifically, a first preset temperature range may be pre-stored in the controller. After the controller obtains the first actual temperature, the first actual temperature may be compared with the first preset temperature range to determine whether the first actual temperature is within the first preset temperature range.

[0145] Exemplarily, assuming that the first preset temperature range is 70°C-80°C, when the first actual temperature is 70°C, 75°C or 80°C, it can be confirmed that the first actual temperature is within the first preset temperature range; when the first actual temperature is 69°C or 81°C, it can be confirmed that the first actual temperature exceeds the first preset temperature range.

[0146] Step 703: When the first actual temperature is greater than the highest temperature in the first preset temperature range, the second three-way diverter valve 13 is controlled to increase the opening of the third interface of the second three-way diverter valve 13 and decrease the openings of the first interface and the second interface of the second three-way diverter valve 13 so that the first actual temperature is within the first preset temperature range.

[0147] When the first actual temperature is greater than the highest temperature in the first preset temperature range, it indicates that the fuel absorbs too much heat from the circulating medium through the first heat exchanger 33, resulting in too high a temperature of the fuel. Therefore, by controlling the second three-way diverter valve 13 to increase the opening of the third interface of the second three-way diverter valve 13 and decrease the openings of the first interface and the second interface of the second three-way diverter valve 13, the amount of heat absorbed by the fuel from the circulating medium through the first heat exchanger 33 is reduced, thereby lowering the temperature of the fuel, thereby avoiding the situation where the fuel temperature is too high and affects the normal operation of the fuel cell A.

[0148] Step 704: When the first actual temperature is lower than the lowest temperature in the first preset temperature range, the second three-way diverter valve 13 is controlled to reduce the opening of the third interface of the second three-way diverter valve 13 and increase the openings of the first interface and the second interface of the second three-way diverter valve 13, and the second heating element 121 is controlled to start heating so that the first actual temperature is within the first preset temperature range.

[0149] When the first actual temperature is lower than the lowest temperature in the first preset temperature range, it indicates that the amount of heat absorbed by the fuel from the circulating medium through the first heat exchanger 33 is too little, resulting in too low a temperature of the fuel. Therefore, the second three-way diverter valve 13 is controlled to reduce the opening of the third interface of the second three-way diverter valve 13 and increase the opening of the first interface and the second interface of the second three-way diverter valve 13, so that the amount of heat absorbed by the fuel from the circulating medium through the first heat exchanger 33 is increased. At the same time, heating can also be started through the second heating element 121. In this way, the temperature of the fuel can be increased, thereby preventing the fuel temperature from being too low and affecting the normal operation of the fuel cell A.

[0150] Step 705 : Acquire the second actual temperature detected by the first temperature detection element 323 .

[0151] First, the second actual temperature of the circulating medium may be detected by the first temperature detection element 323 , and then, the controller of the heat recovery system 100 may obtain the second actual temperature from the first temperature detection element 323 .

[0152] Step 706: Determine whether the second actual temperature is within the second preset temperature range according to the second actual temperature and the second preset temperature range.

[0153] A second preset temperature range may be pre-stored in the controller. After the controller obtains the second actual temperature, the second actual temperature may be compared with the second preset temperature range to determine whether the second actual temperature is within the second preset temperature range.

[0154] Step 707: When the second actual temperature is greater than the highest temperature in the second preset temperature range, the first three-way diverter valve 43 is controlled to reduce the opening of the third interface of the first three-way diverter valve 43 and increase the opening of the first interface and the second interface of the first three-way diverter valve 43.

[0155] When the second actual temperature is greater than the highest temperature in the second preset temperature range, it indicates that the temperature of the circulating medium is too high. When the temperature of the circulating medium is too high, the circulating medium will be able to absorb less heat in the process of flowing through the cooling chamber 31, thereby resulting in poor cooling effect on the fuel cell A. Therefore, by controlling the first three-way diverter valve 43 to reduce the opening of the third interface of the first three-way diverter valve 43 and increase the opening of the first interface and the second interface of the first three-way diverter valve 43, a large amount of cooling medium can flow through the third heat exchanger 36. In this way, the cooling medium can absorb more heat from the circulating medium through the third heat exchanger 36, so that the temperature of the circulating medium gradually decreases, thereby avoiding the occurrence of excessive temperature of the circulating medium.

[0156] Step 708: When the second actual temperature is lower than the lowest temperature in the second preset temperature range, the first three-way diverter valve 43 is controlled to increase the opening of the third interface of the first three-way diverter valve 43 and decrease the opening of the first interface and the second interface of the first three-way diverter valve 43.

[0157] When the second actual temperature is lower than the lowest temperature in the second preset temperature range, it indicates that the temperature of the circulating medium is too low. When the temperature of the circulating medium is too low, the circulating medium will absorb more heat in the process of flowing through the cooling chamber 31, thereby causing the cooling effect on the fuel cell A to be too good, thereby causing the temperature of the fuel cell A to be too low. Therefore, by controlling the first three-way diverter valve 43 to increase the opening of the third interface of the first three-way diverter valve 43 and to decrease the opening of the first interface and the second interface of the first three-way diverter valve 43, the amount of cooling medium flowing through the third heat exchanger 36 can be reduced. In this way, the cooling medium can absorb less heat from the circulating medium through the third heat exchanger 36, so that the temperature of the circulating medium gradually increases, thereby avoiding the situation where the temperature of the circulating medium is too low.

[0158] Next, the present application will provide a more detailed explanation of the heat recovery method in conjunction with the accompanying drawings.

[0159] See also Figure 5 First, fuel and oxidant can be supplied to fuel cell A through fuel supply source B and oxidant supply source C respectively. At the same time, the first actual temperature of the fuel can be detected by the second temperature detection element 14, and the third actual temperature of the oxidant can be detected by the third temperature detection element 24. Considering that when the first actual temperature and the third actual temperature are too low, it may affect the normal operation of fuel cell A, and when fuel cell A has not started working, fuel cell A itself will not release heat to the outside. Therefore, the fuel can be heated by the second heating element 121 and the oxidant can be heated by the third heating element 221, so that the first actual temperature and the third actual temperature can be increased until the first actual temperature is within the first preset temperature range and the third actual temperature is within the third preset temperature range, thereby ensuring that fuel cell A can operate normally.

[0160] When fuel cell A starts to work normally, a reaction will occur between the oxidant and the fuel. When the oxidant and the fuel react, fuel cell A will begin to release heat. At this time, the heat can be used to heat the fuel and the oxidant, while the second heating element 121 and the third heating element 221 stop heating. In this way, the purpose of reducing energy consumption, saving energy and protecting the environment while reducing costs can be achieved.

[0161] The specific process of heating the fuel by utilizing the heat released when the oxidant and the fuel react can be as follows: first, the power component 34 can drive the circulating medium to circulate between the cooling chamber 31 and the circulating pipeline 32 of the fuel cell A. When the circulating medium flows through the cooling chamber 31, the circulating medium can absorb the heat released when the oxidant and the fuel react. When the circulating medium carries the heat and flows through the first heat exchanger 33, the heat in the circulating medium will be transferred to the fuel through the first heat exchanger 33 to achieve the purpose of heating the fuel.

[0162] At the same time, the first actual temperature of the fuel can also be detected by the second temperature detection element 14. When the first actual temperature is lower than the lowest temperature in the first preset temperature range, the opening of the third interface of the second three-way diverter valve 13 can be reduced, and the openings of the first interface and the second interface of the second three-way diverter valve 13 can be increased, so that a large amount of fuel can flow through the first heat exchanger 33. In this way, the fuel can absorb more heat from the circulating medium through the first heat exchanger 33, so that the temperature of the fuel increases until the first actual temperature is within the first preset temperature range. In this way, it can be ensured that the temperature of the fuel meets the temperature requirements.

[0163] When the opening of the third interface of the second three-way diverter valve 13 is adjusted to the minimum and the openings of the first interface and the second interface of the second three-way diverter valve 13 are adjusted to the maximum, if the temperature of the fuel is still not high enough, the second heating element 121 can be controlled to start heating, thereby further ensuring that the first actual temperature is within the first preset temperature range.

[0164] When the first actual temperature is higher than the highest temperature in the first preset temperature range, the opening of the third interface of the second three-way diverter valve 13 can be increased, and the openings of the first interface and the second interface of the second three-way diverter valve 13 can be decreased, so that the amount of fuel flowing through the first heat exchanger 33 is reduced, and a part of the fuel flows directly to the second fuel pipeline 12 through the third interface of the second three-way diverter valve 13. In this way, the fuel can absorb less heat from the circulating medium through the first heat exchanger 33, so that the temperature of the fuel is reduced until the first actual temperature is within the first preset temperature range.

[0165] The specific process of heating the oxidant by utilizing the heat released when the oxidant and the fuel react is similar to the specific process of heating the fuel, and will not be described in detail in this embodiment.

[0166] After the circulating medium flows through the first heat exchanger 33 and the second heat exchanger 35, it will continue to flow through the third heat exchanger 36 and the first temperature detection element 323 in sequence. When the circulating medium flows through the first temperature detection element 323, the second actual temperature of the circulating medium can be detected by the first temperature detection element 323. When the second actual temperature is greater than the highest temperature in the second preset temperature range, it indicates that the temperature of the circulating medium is too high. When the temperature of the circulating medium is too high, the circulating medium will be able to absorb less heat in the subsequent process of flowing through the cooling chamber 31, thereby resulting in poor cooling effect on the fuel cell A. Therefore, the first three-way diverter valve 43 can be controlled to reduce the opening of the third interface of the first three-way diverter valve 43 and increase the opening of the first interface and the second interface of the first three-way diverter valve 43. In this way, a large amount of cooling medium can flow through the third heat exchanger 36. In this way, the cooling medium can absorb more heat from the circulating medium through the third heat exchanger 36, so that the temperature of the circulating medium gradually decreases, and then the second actual temperature can be within the second preset temperature range.

[0167] When the second actual temperature is lower than the lowest temperature in the second preset temperature range, it indicates that the temperature of the circulating medium is too low. When the temperature of the circulating medium is too low, the circulating medium will absorb more heat in the process of flowing through the cooling chamber 31, thereby causing the cooling effect on the fuel cell A to be too good, thereby causing the temperature of the fuel cell A to be too low. Therefore, the first three-way diverter valve 43 can be controlled to increase the opening of the third interface of the first three-way diverter valve 43 and reduce the opening of the first interface and the second interface of the first three-way diverter valve 43. In this way, the amount of cooling medium flowing through the third heat exchanger 36 can be smaller. In this way, the cooling medium can absorb less heat from the circulating medium through the third heat exchanger 36, so that the temperature of the circulating medium gradually increases until the second actual temperature is within the second preset temperature range.

[0168] The present application also provides a fuel cell test bench 200, see Figure 8 , the fuel cell test bench 200 includes a heat recovery system 100 .

[0169] Among them, the structure of the heat recovery system can be the same as the structure of any heat recovery system in the above embodiments, and can bring the same or similar beneficial effects. For details, please refer to the description of the heat recovery system in the above embodiments, which will not be repeated in this embodiment.

[0170] In this embodiment, since the heat recovery system 100 can reduce energy consumption, save energy and protect the environment while reducing costs, based on this, when the fuel cell test bench 200 includes the heat recovery system 100, the fuel cell test bench 200 can have lower energy consumption, save energy and protect the environment while also having lower costs.

[0171] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat recovery system, characterized in that: include: A fuel supply module (1), the fuel supply module (1) being connected to the fuel cell (A) to supply fuel to the fuel cell (A); An oxidant supply module (2), the oxidant supply module (2) being connected to the fuel cell (A) to supply oxidant to the fuel cell (A); a heat recovery module (3), the heat recovery module (3) being used to absorb heat released when the fuel reacts with the oxidant and transfer the heat to at least one of the fuel supply module (1) and the oxidant supply module (2); The heat recovery module (3) comprises: A circulation pipeline (32), wherein the inlet end (321) and the outlet end (322) of the circulation pipeline (32) are both used to be connected to the cooling chamber (31) of the fuel cell (A), and a circulating medium is arranged in the circulation pipeline (32); A power component (34), the power component (34) being connected to the circulation pipeline (32) and used for driving the circulation medium to circulate between the cooling chamber (31) and the circulation pipeline (32).

2. The heat recovery system according to claim 1, characterized in that: The heat recovery module (3) further comprises: A first heat exchanger (33), the first heat exchanger (33) being connected to the circulation pipeline (32); The circulating medium is used to absorb the heat released when the fuel reacts with the oxidant when flowing through the cooling chamber (31), and to transfer the heat to the fuel supply module (1) through the first heat exchanger (33) when flowing through the first heat exchanger (33).

3. The heat recovery system according to claim 2, characterized in that: The heat recovery module (3) further comprises: A second heat exchanger (35), wherein the second heat exchanger (35) is connected to the circulation pipeline (32), and the circulating medium is also used to transfer the heat to the oxidant supply module (2) through the second heat exchanger (35) when flowing through the second heat exchanger (35).

4. The heat recovery system according to claim 3, characterized in that: The heat recovery module (3) further comprises a third heat exchanger (36), wherein the third heat exchanger (36) is connected to the circulation pipeline (32) and is located downstream of the second heat exchanger (35) and the first heat exchanger (33); The heat recovery system further comprises a cooling module (4), wherein the cooling module (4) is used to absorb heat at the third heat exchanger (36).

5. The heat recovery system according to claim 4, characterized in that: The cooling module (4) comprises: a first cooling pipeline (41), one end of the first cooling pipeline (41) being used for cooling medium to enter, and the other end of the first cooling pipeline (41) being connected to the third heat exchanger (36); A second cooling pipeline (42), one end of which is connected to the third heat exchanger (36) and the other end of which is used for discharging the cooling medium.

6. The heat recovery system according to claim 5, characterized in that: The cooling module (4) further comprises a first three-way diverter valve (43), wherein a first interface and a second interface of the first three-way diverter valve (43) are respectively connected to the first cooling pipeline (41), and a third interface of the first three-way diverter valve (43) is connected to the second cooling pipeline (42). A first temperature detection element (323) is connected to the circulation pipeline (32), and the first temperature detection element (323) is located downstream of the third heat exchanger (36).

7. The heat recovery system according to claim 6, characterized in that: The circulation pipeline (32) is connected to a flow metering element (325); and / or, The circulation pipeline (32) is connected to a first heating element (324), and the first heating element (324) is located downstream of the third heat exchanger (36) or upstream of the first heat exchanger (33) and the second heat exchanger (35); and / or, The circulation pipeline (32) is connected to a storage box (326).

8. The heat recovery system according to any one of claims 2 to 7, characterized in that: The fuel supply module (1) comprises: a first fuel pipeline (11), one end of the first fuel pipeline (11) being connected to a fuel supply source (B) and the other end of the first fuel pipeline (11) being connected to the first heat exchanger (33); a second fuel pipeline (12), one end of the second fuel pipeline (12) being in communication with the first heat exchanger (33) and the other end of the second fuel pipeline (12) being in communication with the fuel cell (A); a second three-way flow divider valve (13), wherein a first interface and a second interface of the second three-way flow divider valve (13) are respectively connected to the first fuel pipeline (11), and a third interface of the second three-way flow divider valve (13) is connected to the second fuel pipeline (12); A second temperature detection element (14), the second temperature detection element (14) is connected to the second fuel pipeline (12) and is located downstream of the third interface of the second three-way diverter valve (13).

9. The heat recovery system according to claim 8, characterized in that: The second fuel pipeline (12) is connected to a second heating element (121), and the second heating element (121) is located downstream of the third interface of the second three-way diverter valve (13) and upstream of the second temperature detection element (14).

10. The heat recovery system according to any one of claims 3 to 7, characterized in that: The oxidant supply module (2) comprises: a first oxidant pipeline (21), wherein one end of the first oxidant pipeline (21) is used to communicate with an oxidant supply source (C), and the other end of the first oxidant pipeline (21) is used to communicate with the second heat exchanger (35); a second oxidant pipeline (22), one end of the second oxidant pipeline (22) being in communication with the second heat exchanger (35) and the other end of the second oxidant pipeline (22) being in communication with the fuel cell (A); a third three-way diverter valve (23), wherein the first interface and the second interface of the third three-way diverter valve (23) are respectively connected to the first oxidant pipeline (21), and the third interface of the third three-way diverter valve (23) is connected to the second oxidant pipeline (22); A third temperature detection element (24), the third temperature detection element (24) is connected to the second oxidant pipeline (22) and is located downstream of the third interface of the third three-way diverter valve (23).

11. The heat recovery system according to claim 10, characterized in that: The second oxidant pipeline (22) is also connected to a third heating element (221), and the third heating element (221) is located downstream of the third three-way diverter valve (23) and upstream of the third temperature detection element (24).

12. A fuel cell test bench, characterized in that: A heat recovery system comprising the heat recovery system according to any one of claims 1 to 11.

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