Combined heat and power supply device of fuel cell

Abstract

The utility model provides a fuel cell heat and power cogeneration device which comprises a cabinet body, and a gas-electricity bin and an electric bin are arranged in the cabinet body. A fuel cell power generation module as well as a hydrogen supply module, an air supply module and a heat exchange module which are respectively connected with the fuel cell power generation module are arranged in the gas-electricity bin, and the heat exchange module is used for carrying out heat exchange on heat in the fuel cell power generation module and an external water module; the heat exchange module comprises a high-temperature heat exchange loop, a low-temperature heat exchange loop and a circulating heat exchange pipeline connected with an external water using module, the circulating heat exchange pipeline is connected with the high-temperature heat exchange loop through a high-temperature heat exchanger, and the circulating heat exchange pipeline is connected with the low-temperature heat exchange loop through a low-temperature heat exchanger. The combined heat and power supply device of the fuel cell not only can provide hot water and electric energy for users, but also can improve the integration level and the space utilization rate of parts, is also favorable for improving the heat exchange efficiency of the fuel cell power generation module, and has a very good use effect.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell cogeneration device. Background Art

[0002] A fuel cell is a clean power generation device that directly converts the chemical energy of fuel into direct current electricity. Its working principle is to convert the chemical energy of matter into electrical energy through electrochemical reactions and provide customers with the required electrical energy and thermal energy.

[0003] The structure and principle of the existing fuel cell cogeneration system: The fuel cell cogeneration system usually includes: fuel cell stack module, hydrogen system, air system, cooling circulation system, heat storage and heating system and power supply system. The hydrogen system provides stable hydrogen and oxygen in the air provided by the air system to produce electrochemical reactions in the fuel cell stack module, thereby converting chemical energy into electrical energy and outputting it to users through the power supply system. The heat storage and heating system in the fuel cell cogeneration system mainly recovers the heat generated inside the fuel cell stack module during operation through a plate heat exchanger, thereby generating hot water for users.

[0004] At present, the power generation system in the fuel cell cogeneration system has the following problems: 1. The structure is complex, the system integration is not high, installation is difficult, and disassembly is very troublesome. 2. The layout is unreasonable, the fuel part and the electrical part are integrated together, and there is no effective isolation in the structure, which leads to safety hazards in the use of the system. 3. At present, some fuel cell cogeneration systems arrange the power generation module and the heat storage module in one box, which has a complex structure and is difficult to install, which is not conducive to sales promotion. Utility Model Content

[0005] In view of this, the utility model aims to provide a fuel cell cogeneration device, which can provide hot water and electricity to users while also helping to improve the heat exchange efficiency of the fuel cell power generation module.

[0006] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0007] A fuel cell cogeneration device comprises a cabinet, wherein a fuel cell compartment and an electrical compartment are arranged inside the cabinet;

[0008] The fuel cell power generation module is provided in the fuel cell power generation module, and a hydrogen supply module, an air supply module and a heat exchange module are respectively connected to the fuel cell power generation module, and the heat exchange module is used to exchange heat in the fuel cell power generation module with an external water module;

[0009] The heat exchange module includes a high-temperature heat exchange circuit for exchanging heat for the stack module in the fuel cell power generation module, a low-temperature heat exchange circuit for exchanging heat for peripheral auxiliary components of the stack in the fuel cell power generation module, and a circulating heat exchange pipeline connected to the external water module, the circulating heat exchange pipeline and the high-temperature heat exchange circuit are connected via a high-temperature heat exchanger, and the circulating heat exchange pipeline and the low-temperature heat exchange circuit are connected via a low-temperature heat exchanger.

[0010] Furthermore, a flow converter and a control device connected to the fuel cell power generation module are provided in the electrical compartment, and the flow converter is connected to the control device.

[0011] Furthermore, the high-temperature heat exchange circuit includes a stack module in the fuel cell power generation module connected by a first pipeline, and a first three-way valve and the high-temperature heat exchanger; a first radiator is connected in parallel on the first pipeline; the inlet of the first three-way valve is connected to the stack module, the first outlet of the first three-way valve is connected to the high-temperature heat exchanger, and the second outlet of the first three-way valve is connected to the first radiator.

[0012] Furthermore, the low-temperature heat exchange circuit includes a low-temperature cooling subsystem in the fuel cell power generation module connected by a second pipeline, as well as a second three-way valve and the low-temperature heat exchanger; a second radiator is connected in parallel on the second pipeline; the inlet of the second three-way valve is connected to the low-temperature cooling subsystem, the first outlet of the second three-way valve is connected to the low-temperature heat exchanger, and the second outlet of the second three-way valve is connected to the second radiator.

[0013] Furthermore, a first fan and a second fan are provided in the cabinet; an air inlet of the first fan is connected to the fuel and electricity compartment, and an air outlet of the second fan is connected to the electrical compartment.

[0014] Furthermore, the fuel and power compartment and the electrical compartment respectively constitute independent closed cavities, and a pressure difference detection device for detecting the pressure difference between the fuel and power compartment and the electrical compartment is provided between the fuel and power compartment and the electrical compartment.

[0015] Furthermore, a first hydrogen detection device is provided in the fuel-electric compartment, and the first hydrogen detection device is connected to the control device; and / or a second hydrogen detection device is provided in the electrical compartment, and the second hydrogen detection device is connected to the control device.

[0016] Furthermore, the hydrogen supply module includes a hydrogen supply pipeline connected to the hydrogen subsystem in the fuel cell power generation module, and a valve is provided on the hydrogen supply pipeline; the air supply module includes an air supply pipeline connected to the air subsystem in the fuel cell power generation module, and an air filter is provided on the air supply pipeline.

[0017] Furthermore, the air supply module also includes an exhaust pipeline connected to both the air subsystem and the hydrogen subsystem, and a muffler is provided on the exhaust pipeline.

[0018] Furthermore, a tail exhaust heat exchanger is provided on the exhaust pipeline, and the tail exhaust heat exchanger is located upstream of the muffler.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] The fuel cell cogeneration device described in the utility model can not only exchange heat for the stack module and peripheral auxiliary components of the stack in the fuel cell power generation module, but also the circulating heat exchange pipeline is connected to both the high-temperature heat exchanger and the low-temperature heat exchanger, so that the fuel cell cogeneration device can not only provide hot water and electricity for users, but also has a high degree of integration and component space utilization, and is also beneficial to improving the heat exchange efficiency of the fuel cell power generation module, thereby having a good use effect.

[0021] In addition, arranging the inverter and control devices in the electrical compartment is also conducive to improving the integration of the fuel cell cogeneration device and the space utilization of components. The isolation design of the fuel cell compartment and the electrical compartment allows the separation of electricity and gas to meet the application of different scenarios, which is also conducive to the industrialization and commercialization of the fuel cell cogeneration device.

[0022] Secondly, the first fan and the second fan are arranged in the cabinet, and the air inlet of the first fan is connected to the fuel and electricity compartment, and the air outlet of the second fan is connected to the electrical compartment. This is conducive to keeping the fuel and electricity compartment in a negative pressure state and the electrical compartment in a positive pressure state, and can ensure the complete isolation of gas and electricity. The fuel and electricity compartment and the electrical compartment are respectively formed into independent closed cavities, which can further help the fuel and electricity compartment to remain in a negative pressure state and the electrical compartment to remain in a positive pressure state, thereby reducing energy consumption. In addition, a pressure difference detection device is arranged between the fuel and electricity compartment and the electrical compartment, which is conducive to detecting the pressure difference between the fuel and electricity compartment and the electrical compartment, and further ensuring the complete isolation of gas and electricity.

[0023] Furthermore, the setting of the first hydrogen detection device is conducive to detecting the hydrogen leakage concentration in the fuel and electricity compartment, and the setting of the second hydrogen detection device is conducive to detecting the hydrogen leakage concentration in the electrical compartment. The first hydrogen detection device and the second hydrogen detection device are connected to the control device, which can be used to timely control the shutdown of the hydrogen source and cut off the load when the hydrogen leakage exceeds the set value, thereby ensuring the safety of system operation.

[0024] In addition, the hydrogen supply pipeline and valve are used to provide hydrogen to the stack module in the fuel cell power generation module. The air supply pipeline is used to provide air to the stack module, and the air filter is used to purify the provided air. The exhaust pipeline is conducive to the discharge of tail exhaust after the fuel cell stack reaction, and the silencer is set to reduce exhaust noise. The tail exhaust heat exchanger is conducive to the recovery of heat in the tail exhaust of the stack module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of a fuel cell cogeneration device according to an embodiment of the utility model;

[0027] Figure 2 This is a schematic structural diagram of a fuel cell cogeneration device according to an embodiment of the utility model;

[0028] Figure 3 It is a partial cross-sectional view of the cabinet according to the embodiment of the utility model;

[0029] Figure 4 This is a structural schematic diagram of a fuel cell cogeneration device without a cabinet assembly according to an embodiment of the utility model;

[0030] Figure 5 This is a structural diagram of each module in the fuel-electricity warehouse according to an embodiment of the utility model;

[0031] Description of reference numerals:

[0032] 1. Fuel cell power generation module; 2. Converter; 3. Control device; 4. Hydrogen inlet; 5. Valve; 6. Air inlet; 7. Air filter; 8. Third three-way valve; 9. Tail exhaust heat exchanger; 10. Muffler; 11. Tail gas outlet; 12. First three-way valve; 13. First radiator; 14. High-temperature heat exchanger; 15. Second three-way valve; 16. Second radiator; 17. Low-temperature heat exchanger; 18. First hydrogen detection device; 19. Second hydrogen detection device; 20. Pressure difference detection device;

[0033] 100, first pipeline; 200, second pipeline; 300, first branch pipeline; 400, second branch pipeline; 500, hydrogen supply pipeline; 600, gas supply pipeline; 700, exhaust pipeline; 800, hydrogen exhaust branch pipeline;

[0034] 111. Cabinet; 112. Fuel and electricity compartment; 113. Electric compartment; 114. Partition plate; 115. First fan; 116. Second fan; 121. Circulating heat exchange pipeline. DETAILED DESCRIPTION

[0035] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0036] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0038] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0039] The present embodiment relates to a fuel cell cogeneration device, which can provide hot water and electricity to users, and can also improve the integration and space utilization of components, and is also conducive to improving the heat exchange efficiency of the fuel cell power generation module.

[0040] In terms of overall composition, Figure 1 and Figure 2 As shown, the fuel cell cogeneration device cabinet 111 of this embodiment has a fuel cell compartment 112 and an electrical compartment 113 disposed therein.

[0041] Among them, a fuel cell power generation module 1, as well as a hydrogen supply module, an air supply module and a heat exchange module respectively connected to the fuel cell power generation module 1 are provided in the fuel-electricity warehouse 112. The heat exchange module is used to exchange heat in the fuel cell power generation module 1 with an external water module.

[0042] Moreover, the heat exchange module includes a high-temperature heat exchange circuit for exchanging heat for the stack module in the fuel cell power generation module 1, a low-temperature heat exchange circuit for exchanging heat for peripheral auxiliary components of the stack in the fuel cell power generation module 1, and a circulating heat exchange pipeline 121 connected to the external water module. The circulating heat exchange pipeline 121 is connected to the high-temperature heat exchange circuit through a high-temperature heat exchanger 14, and the circulating heat exchange pipeline 121 is connected to the low-temperature heat exchange circuit through a low-temperature heat exchanger 17.

[0043] At this time, as in the above structure, a fuel cell power generation module, a hydrogen supply module, an air supply module and a heat exchange module are arranged in the fuel-electric compartment, as well as a high-temperature heat exchange circuit, a low-temperature heat exchange circuit and a circulating heat exchange pipeline 121 provided in the heat exchange module, and the circulating heat exchange pipeline is connected to both the high-temperature heat exchanger and the low-temperature heat exchanger. In this way, the fuel cell cogeneration device can not only provide hot water and electricity for users, but also has a high degree of integration and component space utilization, and is also beneficial to improving the heat exchange efficiency of the fuel cell power generation module.

[0044] In detail, in this embodiment, see Figure 2 Combined with Figure 3 As shown, the cabinet 111 has a frame structure inside, and side panels and cabinet doors are arranged outside the cabinet 111. The cabinet 111 is separated into a fuel and power compartment 112 and an electrical compartment 113, and the fuel and power compartment 112 and the battery compartment are arranged side by side.

[0045] The fuel cell power generation module 1 of this embodiment can refer to the structure in the prior art, and has a hydrogen subsystem, an air subsystem, a high-temperature cooling subsystem, and a low-temperature cooling subsystem integrated therein. Among them, the hydrogen subsystem includes a hydrogen heat exchanger, a hydrogen shut-off valve, a hydrogen regulating valve, a hydrogen nitrogen exhaust valve, a gas-liquid separator, a hydrogen drain valve, etc., and the hydrogen subsystem is used to provide hydrogen for the fuel cell power generation module 1. The air subsystem includes an air compressor, an intercooler, a bypass valve, an air front shut-off valve, an air rear shut-off valve, a humidifier, a back pressure valve, etc., and the air subsystem is used to provide air for the fuel cell power generation module 1.

[0046] The high-temperature cooling subsystem includes a cooling water pump, a deionizer, a PTC, an intercooler cooling circuit, etc., and its main function is to cool the stack module in the fuel cell power generation module 1. The low-temperature cooling subsystem includes a first heat exchanger arranged on the air compressor, an air compressor cooling circuit connected to the first heat exchanger, a second heat exchanger arranged on the air compressor controller, an air compressor controller cooling circuit connected to the second heat exchanger, and a third heat exchanger arranged on the DCDC converter, a DCDC converter cooling circuit connected to the third heat exchanger, etc., and its main function is to cool the peripheral auxiliary components of the stack, including the air compressor, the air compressor controller and the DCDC converter.

[0047] In this embodiment, the hydrogen supply module and the air supply module respectively provide hydrogen and air to the stack module in the fuel cell power generation module 1, and the heat exchange module can exchange heat in the fuel cell power generation module 1 with the external water module to recover the heat in the fuel cell power generation module 1. The external water module can be, for example, a water supply device for the user, which provides circulating hot water for the user by recovering the heat in the fuel cell power generation module 1.

[0048] On the basis of the fuel cell power generation module, hydrogen supply module, air supply module and heat exchange module arranged in the fuel cell and power storage, in this embodiment, a converter 2 and a control device 3 connected to the fuel cell power generation module 1 are arranged in the electrical storage 113, and the converter 2 is connected to the control device 3. Such an arrangement can further improve the integration degree and component space utilization of the fuel cell cogeneration device, and the fuel cell and power storage 112 and the electrical storage 113 are isolated, so that the electricity and gas separation design can meet the application of different scenarios, and is also conducive to the industrialization and commercialization of the fuel cell cogeneration device.

[0049] The converter 2 in the electrical compartment 113 may be, for example, a converter, which is provided with a user interface and can convert the direct current generated by the fuel cell power generation module 1 into the alternating current required by the user for use by the user. The control device 3 is provided to adjust the generated power to ensure safe and stable operation of the power.

[0050] Continue to view Figure 1 As shown, in this embodiment, the heat exchange module includes a high-temperature heat exchange circuit, a low-temperature heat exchange circuit and a circulating heat exchange pipeline 121. Among them, the high-temperature heat exchange circuit is used to exchange heat with the stack module in the fuel cell power generation module 1, and the low-temperature heat exchange circuit is used to exchange heat with the peripheral auxiliary components of the stack. The heat exchange inlet and heat exchange outlet of the circulating heat exchange pipeline 121 are respectively connected to the external water module to form a circulating heat exchange circuit for providing hot water to the outside. In addition, a high-temperature heat exchanger 14 for heat exchange between the high-temperature heat exchange circuit and the circulating heat exchange circuit is provided between the high-temperature heat exchange circuit and the circulating heat exchange circuit, and a low-temperature heat exchanger 17 for heat exchange between the low-temperature heat exchange circuit and the circulating heat exchange circuit is provided between the low-temperature heat exchange circuit and the circulating heat exchange circuit.

[0051] As a preferred implementation, in this embodiment, the high-temperature heat exchange circuit includes a stack module in the fuel cell power generation module 1 connected by a first pipeline 100, as well as a first three-way valve 12 and a high-temperature heat exchanger 14. In addition, a first radiator 13 is connected in parallel to the first pipeline 100. Specifically, the inlet of the first three-way valve 12 is connected to the stack module, the first outlet of the first three-way valve 12 is connected to the high-temperature heat exchanger 14, and the second outlet of the first three-way valve 12 is connected to the first radiator 13. In addition, it is worth noting that the high-temperature heat exchange circuit also includes a high-temperature cooling subsystem, and the cooling path of the high-temperature cooling subsystem is connected to the coolant of the stack module, which cooperates with the first pipeline to perform heat exchange for the stack module.

[0052] The low-temperature heat exchange circuit includes a low-temperature cooling subsystem in the fuel cell power generation module 1 connected by the second pipeline 200, as well as a second three-way valve 15 and a low-temperature heat exchanger 17. And a second radiator 16 is connected in parallel to the second pipeline 200. In terms of specific structure, the inlet of the second three-way valve 15 is connected to the low-temperature cooling subsystem, the first outlet of the second three-way valve 15 is connected to the low-temperature heat exchanger 17, and the second outlet of the second three-way valve 15 is connected to the second radiator 16. In addition, during specific implementation, the first radiator 13 and the second radiator 16 are arranged on the top of the cabinet 111.

[0053] This embodiment can dissipate the heat generated by the operation of the system in the power supply only mode through the provision of the first radiator 13 and the second radiator 16. At this time, the heat of the fuel cell power generation module 1 is not recovered, and when electricity and heat are provided at the same time, it is also beneficial to dissipate excess heat.

[0054] As a preferred implementation, in this embodiment, Figure 3 As shown, a first fan 115 and a second fan 116 are provided in the cabinet 111, wherein the air inlet of the first fan 115 is connected to the fuel and electricity compartment 112, and the air outlet of the second fan 116 is connected to the electrical compartment 113. In this way, the fuel and electricity compartment 112 can be kept in a negative pressure state, and the electrical compartment 113 can be kept in a positive pressure state, thereby ensuring complete isolation of gas and electricity.

[0055] As a further preferred embodiment, in this embodiment, the fuel and electricity compartment 112 and the electrical compartment 113 respectively constitute independent closed cavities, which can further help the fuel and electricity compartment 112 to remain in a negative pressure state and the electrical compartment 113 to remain in a positive pressure state, and can also reduce energy consumption. In specific implementation, a partition plate 114 is provided in the cabinet 111, and the partition plate 114 is sealed and connected to the side wall of the cabinet 111 by a sealant, thereby separating the fuel and electricity compartment 112 and the electrical compartment 113 inside the cabinet 111. Moreover, in this embodiment, a pressure difference detection device 20 is provided between the fuel and electricity compartment 112 and the electrical compartment 113, and the pressure difference detection device 20 is used to detect the pressure difference between the fuel and electricity compartment 112 and the electrical compartment 113, so as to further ensure that they are completely isolated from electricity. Among them, the pressure difference detection device 20 can preferably adopt a gas pressure difference sensor.

[0056] Also as a preferred implementation, in this embodiment, combined with Figure 1 , Figure 2 and Figure 5 A first hydrogen detection device 18 is provided in the fuel-electricity warehouse 112, and the first hydrogen detection device 18 is connected to the control device 3. The setting of the first hydrogen detection device 18 is conducive to detecting the hydrogen leakage concentration in the fuel-electricity warehouse 112. In addition, in this embodiment, a second hydrogen detection device 19 is also provided in the electrical warehouse 113, and the second hydrogen detection device 19 is connected to the control device 3. The setting of the second hydrogen detection device 19 is conducive to detecting the hydrogen leakage concentration in the electrical warehouse 113. Moreover, the first hydrogen detection device 18 and the second hydrogen detection device 19 are both connected to the control device 3, which can be used to timely control the closure of the hydrogen source and cut off the load when the hydrogen leakage exceeds the set value, so as to ensure the safety of system operation.

[0057] It should be noted that the first hydrogen detection device 18 and the second hydrogen detection device 19 can be, for example, hydrogen detectors in the prior art. In addition, it can be understood that in this embodiment, in addition to setting the first hydrogen detection device 18 in the fuel and power warehouse 112 and setting the second hydrogen detection device 19 in the electrical warehouse 113, it is also possible to set the first hydrogen detection device 18 only in the fuel and power warehouse 112, or to set the second hydrogen detection device 19 only in the electrical warehouse 113.

[0058] In this embodiment, the hydrogen supply module is used to provide hydrogen to the stack module in the fuel cell power generation module 1, which specifically includes a hydrogen supply pipeline 500 connected to the hydrogen subsystem in the fuel cell power generation module 1, and a valve 5 is provided on the hydrogen supply pipeline 500. Among them, the end of the hydrogen supply pipeline 500 away from the valve 5 constitutes a hydrogen inlet 4 for connection with a hydrogen storage device. The air supply module is used to provide air to the stack module, and it includes an air supply pipeline 600 connected to the air subsystem in the fuel cell power generation module 1, and an air filter 7 is provided on the air supply pipeline 600. Among them, the end of the air supply pipeline 600 away from the air filter 7 constitutes an air inlet 6. And the air filter 7 provided on the air supply pipeline 600 can purify the provided air.

[0059] In addition, the air supply module of this embodiment also includes an exhaust pipeline 700 connected to both the air subsystem and the hydrogen subsystem, and a muffler 10 is provided on the exhaust pipeline 700. Specifically, the exhaust pipeline 700 includes an exhaust main pipeline and a hydrogen exhaust branch 800, and a third three-way valve 8 is provided on the exhaust main pipeline. One end of the hydrogen exhaust branch 800 is connected to the hydrogen subsystem, and the other end is connected to the third three-way valve 8, so that the hydrogen in the hydrogen exhaust branch can also be discharged through the exhaust main pipeline, and the muffler is arranged near the exhaust outlet 11. The arrangement of the exhaust pipeline 700 in this embodiment can facilitate the discharge of tail exhaust after the reaction of the fuel cell stack, and the arrangement of the muffler 10 can also help reduce exhaust noise.

[0060] In addition, in this embodiment, a tail exhaust heat exchanger 9 is also provided on the exhaust pipeline 700, and the tail exhaust heat exchanger 9 is located upstream of the muffler 10, that is, between the third three-way valve 8 and the muffler. Moreover, the two heat exchange ports on the tail exhaust heat exchanger 9 are respectively connected to the second pipeline 200, and are arranged in parallel with the low-temperature heat exchanger 17, which can facilitate the recovery of heat in the tail exhaust of the stack module.

[0061] The fuel cell cogeneration device of this embodiment can realize a power supply only mode or a power and heat supply mode at the same time. Detailed description is as follows.

[0062] When the customer selects power-only mode, heat does not need to be recovered.

[0063] High-temperature heat exchange circuit: By adjusting the first three-way valve 12, the branch pipeline of the first radiator 13 is connected, that is, the first branch pipeline 300 is connected, and the branch pipeline where the high-temperature heat exchanger 14 is located is not connected. At this time, the heat generated by the operation of the fuel cell module is dissipated through the first radiator 13, and the coolant no longer flows in the direction of the high-temperature heat exchanger 14, and heat recovery is no longer performed.

[0064] At the same time, the low-temperature heat exchange circuit: by adjusting the second three-way valve 15, the branch pipeline of the second radiator 16 is connected, that is, the second branch pipeline 400 is connected, and the branch pipeline where the low-temperature heat exchanger 17 is located is not connected. At this time, the heat generated by the peripheral auxiliary components of the fuel cell stack is dissipated through the second radiator 16, and the coolant no longer flows in the direction of the low-temperature heat exchanger 17, and the heat of the peripheral auxiliary components of the fuel cell stack is no longer recovered.

[0065] When customers choose the mode where both electricity and heat are provided,

[0066] High-temperature heat exchange circuit: By adjusting the first three-way valve 12, the high-temperature heat exchanger 14 recovers the heat generated by the operation of the fuel cell module. When the recovered heat has met the customer's needs or the recovered heat is insufficient to replace the heat generated by the fuel cell module, the excess heat is dissipated through the first radiator 13 by adjusting the opening of the first three-way valve 12.

[0067] At the same time, the low-temperature heat exchange circuit: by adjusting the second three-way valve 15, the low-temperature heat exchanger 17 recovers the heat generated during the operation of the peripheral auxiliary components of the fuel cell stack. When the recovered heat has met the customer's needs or the recovered heat is insufficient to replace the heat generated by the peripheral auxiliary components of the fuel cell stack, the excess heat is dissipated through the second radiator 16 by adjusting the opening of the second three-way valve 15.

[0068] The fuel cell cogeneration device of this embodiment not only has high integration and high component space utilization, but also has an effective separation design of electricity and gas, and can also improve the heat exchange efficiency of the fuel cell power generation module. It can also meet the application of different scenarios, is more conducive to the industrialization and commercialization of the fuel cell cogeneration system, and has a good use effect.

[0069] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel cell cogeneration device, characterized in that: It comprises a cabinet (111), wherein a fuel and electricity compartment (112) and an electrical compartment (113) are arranged inside the cabinet (111); The fuel cell power generation module (1) is provided in the fuel cell power generation module (1), and a hydrogen supply module, an air supply module and a heat exchange module respectively connected to the fuel cell power generation module (1), wherein the heat exchange module is used to perform heat exchange between the heat in the fuel cell power generation module (1) and an external water module; The heat exchange module comprises a high-temperature heat exchange circuit for exchanging heat with the stack module in the fuel cell power generation module (1), a low-temperature heat exchange circuit for exchanging heat with peripheral auxiliary components of the stack in the fuel cell power generation module (1), and a circulating heat exchange pipeline (121) connected to the external water module, wherein the circulating heat exchange pipeline (121) is connected to the high-temperature heat exchange circuit via a high-temperature heat exchanger (14), and the circulating heat exchange pipeline (121) is connected to the low-temperature heat exchange circuit via a low-temperature heat exchanger (17).

2. The fuel cell cogeneration device according to claim 1, characterized in that: The electrical compartment (113) is provided with a flow conversion device (2) and a control device (3) connected to the fuel cell power generation module (1), and the flow conversion device (2) is connected to the control device (3).

3. The fuel cell cogeneration device according to claim 2, characterized in that: The high-temperature heat exchange circuit comprises a fuel cell stack module in the fuel cell power generation module (1), a first three-way valve (12) and the high-temperature heat exchanger (14) connected via a first pipeline (100); The first pipeline (100) is connected in parallel with a first radiator (13); The inlet of the first three-way valve (12) is connected to the fuel cell stack module, the first outlet of the first three-way valve (12) is connected to the high-temperature heat exchanger (14), and the second outlet of the first three-way valve (12) is connected to the first radiator (13).

4. The fuel cell cogeneration device according to claim 2, characterized in that: The low-temperature heat exchange circuit comprises a low-temperature cooling subsystem in the fuel cell power generation module (1) connected via a second pipeline (200), a second three-way valve (15) and the low-temperature heat exchanger (17); The second pipeline (200) is connected in parallel with a second radiator (16); The inlet of the second three-way valve (15) is connected to the low-temperature cooling subsystem, the first outlet of the second three-way valve (15) is connected to the low-temperature heat exchanger (17), and the second outlet of the second three-way valve (15) is connected to the second radiator (16).

5. The fuel cell cogeneration device according to claim 1, characterized in that: The cabinet (111) is provided with a first fan (115) and a second fan (116); The air inlet of the first fan (115) is connected to the fuel and electricity compartment (112), and the air outlet of the second fan (116) is connected to the electricity compartment (113).

6. The fuel cell cogeneration device according to claim 5, characterized in that: The fuel and power compartment (112) and the electrical compartment (113) respectively constitute independent closed cavities, and a pressure difference detection device (20) for detecting the pressure difference between the fuel and power compartment (112) and the electrical compartment (113) is provided between the fuel and power compartment (112) and the electrical compartment (113).

7. The fuel cell cogeneration device according to claim 2, characterized in that: The fuel-electricity warehouse (112) is provided with a first hydrogen detection device (18), and the first hydrogen detection device (18) is connected to the control device (3); and / or, A second hydrogen detection device (19) is provided in the electrical compartment (113), and the second hydrogen detection device (19) is connected to the control device (3).

8. The fuel cell cogeneration device according to any one of claims 1 to 7, characterized in that: The hydrogen supply module comprises a hydrogen supply pipeline (500) connected to the hydrogen subsystem in the fuel cell power generation module (1), and a valve (5) is provided on the hydrogen supply pipeline (500); The air supply module comprises an air supply pipeline (600) connected to the air subsystem in the fuel cell power generation module (1), and an air filter (7) is provided on the air supply pipeline (600).

9. The fuel cell cogeneration device according to claim 8, characterized in that: The air supply module further comprises an exhaust pipeline (700) connected to both the air subsystem and the hydrogen subsystem, and a muffler (10) is disposed on the exhaust pipeline (700).

10. The fuel cell cogeneration device according to claim 9, characterized in that: The exhaust pipe (700) is provided with a tail exhaust heat exchanger (9), and the tail exhaust heat exchanger (9) is located upstream of the muffler (10).

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