CN217035686U - Fuel cell combined supply system - Google Patents

Abstract

The utility model relates to the technical field of fuel cells, in particular to a fuel cell combined supply system. The application aims to solve the problem that the heat energy utilization rate of a fuel cell cogeneration system is low. To this end, the fuel cell co-generation system of the present application includes: a fuel cell unit having a cooling inlet and a cooling outlet; the heat-preserving water tank is provided with a heat exchange inlet, a heat exchange outlet, a water replenishing port and a first heat outlet, the heat exchange inlet is communicated with the cooling outlet, the heat exchange outlet is communicated with the cooling inlet, and the water replenishing port is communicated with a water source; a first circulation pump configured to drive a coolant to circulate between the fuel cell unit and the warm water tank; the air conditioning unit comprises a heat exchange component, the heat exchange component comprises a first inlet, a first outlet, a second inlet and a second outlet, and the first heat outlet is communicated with the first inlet. This application can make full use of fuel cell's heat production, improves heat utilization rate.

Description

Fuel cell combined supply system

Technical Field

The utility model relates to the technical field of fuel cells, in particular to a fuel cell combined supply system.

Background

Fuel cells are currently mainly used in cogeneration systems to supply electricity and heat to users, because they produce electricity and heat during their operation.

However, in practical applications, the power demand of the user is far greater than the heat demand, and the excess heat energy is generally wasted by heat dissipation, which results in low heat utilization of the fuel cell system.

Accordingly, there is a need in the art for a new fuel cell cogeneration system that addresses the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

In order to solve at least one of the above-mentioned problems in the prior art, that is, to solve the problem that the thermal energy utilization rate of the fuel cell cogeneration system is low, the present application provides a fuel cell cogeneration system, including: a fuel cell unit having a cooling inlet and a cooling outlet; the heat-preserving water tank is provided with a heat exchange inlet, a heat exchange outlet, a water replenishing port and a first heat outlet, the heat exchange inlet is communicated with the cooling outlet, the heat exchange outlet is communicated with the cooling inlet, and the water replenishing port is communicated with a water source; a first circulation pump configured to circulate a coolant between the fuel cell unit and the warm water tank; the air conditioning unit comprises a heat exchange component, the heat exchange component comprises a first inlet, a first outlet, a second inlet and a second outlet, and the first heat outlet is communicated with the first inlet.

In a preferred embodiment of the above-described fuel cell cogeneration system, the first heat outlet is provided at an upper portion of the hot water tank, and/or the water replenishment port is provided at a lower portion of the hot water tank.

In a preferred technical scheme of the combined fuel cell supply system, the combined fuel cell supply system further includes a first water mixing valve, a hot water inlet of the first water mixing valve is communicated with the first hot outlet, a cold water inlet of the first water mixing valve is communicated with a water source, and a water mixing outlet of the first water mixing valve is communicated with a water supply switch.

In the preferable technical scheme of the fuel cell combined supply system, a heat exchange coil is further arranged in the heat preservation water tank, and two ends of the heat exchange coil are respectively communicated with the heat exchange inlet and the heat exchange outlet.

In the preferable technical scheme of the fuel cell combined supply system, the heat-insulating water tank is also provided with a second heat outlet, and the second heat outlet can be communicated with an inlet of the heating heat exchanger.

In a preferred technical solution of the above fuel cell cogeneration system, the second heat outlet is provided in the middle of the heat-insulating water tank.

In a preferred technical scheme of the fuel cell combined supply system, the fuel cell combined supply system further includes a second water mixing valve, a hot water inlet of the second water mixing valve is communicated with the second heat outlet, a cold water inlet of the second water mixing valve is communicated with a water source, and a water mixing outlet of the second water mixing valve is communicated with an inlet of the heating heat exchanger.

In a preferred technical solution of the above fuel cell cogeneration system, the fuel cell cogeneration system further includes a radiator, an inlet of the radiator is communicated with the cooling outlet, and an outlet of the radiator is communicated with the cooling inlet.

In a preferred technical solution of the above-mentioned fuel cell cogeneration system, the air conditioning unit includes an absorber, a steam generator, a condenser, a throttling element, and an evaporator that are circularly communicated through a refrigerant pipeline, an ammonia solution is stored in the absorber and the steam generator, the heat exchange component is the steam generator, the steam generator has the first inlet, the first outlet, the second inlet, and the second outlet, the heat-preservation water tank further has a water return port, the first outlet is communicated with the water return port, the second inlet is communicated with an outlet of the absorber, and the second outlet is communicated with the condenser.

In a preferred technical solution of the above fuel cell co-generation system, the air conditioning unit includes an absorber, a steam generator, a condenser, a throttling element, and an evaporator that are circularly communicated through a refrigerant pipeline, an ammonia solution is stored in the absorber and the steam generator, the heat exchanging component is a heat exchanger, the heat exchanger has the first inlet, the first outlet, the second inlet, and the second outlet, the heat-insulating water tank further has a water return port, the first outlet is communicated with the water return port, the second inlet is communicated with a low-temperature outlet of the steam generator, and the second outlet is communicated with a high-temperature inlet of the steam generator.

Through the first import intercommunication with holding water box's first heat export and heat transfer part, can utilize the heat energy in the holding water box and carry out the heat transfer with the air conditioning unit, make full use of fuel cell's heat production improves heat utilization rate.

Further, the first heat outlet is arranged at the upper part of the heat preservation water tank, so that heat can be supplied by using high-temperature water at the upper part of the heat preservation water tank, and the heat supply effect is improved. The water replenishing port is arranged at the lower part of the heat preservation water tank, so that the temperature impact of water replenishing on the inside of the heat preservation water tank can be reduced.

Furthermore, by arranging the replacement heat coil pipe in the heat preservation water tank, an independent cooling loop can be formed by utilizing the heat exchange coil pipe, the temperature fluctuation of the inlet and outlet fuel cell unit is reduced, and the reaction stability of the fuel cell unit is ensured.

Furthermore, through the arrangement of the second heat outlet, heat can be supplied by using water in the heat-preservation water tank, and the heat utilization rate is improved.

Furthermore, the second heat outlet is arranged in the middle of the heat-preservation water tank, so that heat can be supplied by using water in the middle of the heat-preservation water tank, and the heating effect is improved.

Furthermore, by arranging the radiator, the radiator can be used for radiating the fuel cell unit, and the operation stability of the fuel cell unit is ensured.

Furthermore, the air conditioning unit adopts an ammonia refrigeration mode, so that the applicable temperature range of refrigeration is wider. The hot water of the first heat outlet is utilized to carry out direct or indirect heat exchange with the steam generator, so that the waste heat refrigeration of the fuel cell unit can be realized, the heat energy utilization rate is improved, and the cold, heat and electricity requirements of users are met.

Drawings

The fuel cell co-generation system of the present application is described below with reference to the drawings. In the drawings:

fig. 1 is a partial system diagram of a fuel cell cogeneration system of the present application.

List of reference numerals

1. A fuel cell unit; 11. a cooling inlet; 12. a cooling outlet; 2. a heat preservation water tank; 21. a heat exchange inlet; 22. a heat exchange outlet; 23. water replenishing; 24. a first heat outlet; 25. a second heat outlet; 26. a water return port; 31. a first circulation pump; 32. a second circulation pump; 4. an air conditioning unit; 41. an absorber; 42. a steam generator; 43. a condenser; 44. a throttling element; 45. an evaporator; 46. adjusting a valve; 47. a heat exchanger; 51. a first water mixing valve; 52. a second water mixing valve; 6. a heat exchange coil; 7. a heat sink; 81. a first on-off valve; 82. a second on-off valve; 83. a third shutoff valve; 84. a fourth shutoff valve; 85. a fifth on-off valve; 86. a sixth on-off valve; 87. a seventh on-off valve; 9. a three-way control valve.

Detailed Description

Preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principles of the present application, and are not intended to limit the scope of protection of the present application.

It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," "fourth," "fifth," "sixth," and "seventh" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present application, unless explicitly stated or limited otherwise, the term "connected" is to be interpreted broadly, e.g. as a fixed connection, a detachable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.

The fuel cell co-generation system of the present application is described below with reference to fig. 1. Fig. 1 is a partial system diagram of the fuel cell cogeneration system of the present application. In fig. 1, a solid line indicates a water path, a broken line indicates a refrigerant circuit, and a dashed line indicates a cooling circuit.

As shown in fig. 1, in order to solve the problem of low heat energy utilization rate of the fuel cell cogeneration system, the fuel cell cogeneration system of the present application includes a fuel cell unit 1, a holding water tank 2, a first circulation pump 31, and an air conditioning unit 4. The fuel cell unit 1 has a cooling inlet 11 and a cooling outlet 12, the heat preservation water tank 2 has a heat exchange inlet 21, a heat exchange outlet 22, a water replenishing port 23 and a first heat outlet 24, the heat exchange inlet 21 is communicated with the cooling outlet 12 through a pipeline, the heat exchange outlet 22 is communicated with the cooling inlet 11 through a pipeline, the water replenishing port 23 is communicated with a water source through a pipeline, the first circulating pump 31 is arranged on the pipeline between the heat exchange outlet 22 and the cooling inlet 11, and the first circulating pump can drive a cooling liquid to circulate between the fuel cell unit 1 and the heat preservation water tank 2. The coolant is not limited in this application, and water may be used, or other coolants may be used. The air conditioning unit 4 includes a heat exchange component including a first inlet, a first outlet, a second inlet, and a second outlet, wherein the first heat outlet 24 is in communication with the first inlet via a conduit.

When the system works, the fuel cell unit 1 generates electricity and heat at the same time, the first circulating pump 31 drives the cooling liquid to circulate so as to transfer the heat to the heat-preservation water tank 2, and the water in the heat-preservation water tank 2 is heated. Hot water in the heat preservation water tank 2 is discharged through the first heat outlet 24 and enters the heat exchange component through the first inlet to participate in heat exchange of the air conditioning unit 4, and heat transfer between the heat preservation water tank 2 and the air conditioning unit 4 is achieved.

Through the first import intercommunication with heat preservation water tank 2's first heat export 24 and heat transfer parts, can utilize the heat energy in heat preservation water tank 2 and air conditioning unit 4 to carry out the heat transfer, make full use of fuel cell's heat production improves heat utilization rate.

Note that the fuel cell unit 1 generally further includes a fuel inlet, a fuel outlet, an oxidant inlet, an oxidant outlet, and the like, and the fuel cell system generally further includes a power converter. The fuel inlet and the fuel outlet communicate with a fuel supply system to enable supply of fuel and discharge of remaining fuel, and the oxidant inlet and the oxidant outlet communicate with an oxidant supply system to enable supply of oxidant and discharge of reaction products and remaining oxidant. The electric energy generated by the fuel cell is supplied to a user through the converter. The above-described components and structures are not described in detail in this application in order to not unnecessarily obscure the utility model of the present application.

A more preferred embodiment of the present application will now be described with further reference to fig. 1.

As shown in fig. 1, a cooling pipe is provided inside the fuel cell unit 1, and both ends of the cooling pipe are connected to a cold zone inlet and a cooling outlet 12, respectively. The heat preservation water tank 2 is preferably vertically arranged, and a water replenishing port 23, a heat exchange inlet 21, a heat exchange outlet 22, a first water outlet and a second water outlet are arranged on the heat preservation water tank 2.

The water replenishing port 23 is arranged at the lower part of the heat preservation water tank 2, a water source is communicated with a first interface (a left interface of the three-way control valve 9 in figure 1) of the three-way control valve 9 through a pipeline, and the water replenishing port 23 is communicated with a second interface (a right interface of the three-way control valve 9 in figure 1) of the three-way control valve 9 through a pipeline.

The heat exchange inlet 21 and the heat exchange outlet 22 are respectively arranged at the upper part and the lower part of the heat preservation water tank 2, the heat exchange inlet 21 is communicated with the cooling outlet 12 through a pipeline, the heat exchange outlet 22 is communicated with the cooling inlet 11 through a pipeline, a first on-off valve 81 is arranged on the pipeline between the heat exchange inlet 21 and the cooling outlet 12, and a first circulating pump 31 is arranged on the pipeline between the heat exchange outlet 22 and the cooling inlet 11. The heat-exchanging coil 6 is further arranged in the heat-insulating water tank 2, and two ends of the heat-exchanging coil 6 are respectively connected with the heat-exchanging inlet 21 and the heat-exchanging outlet 22, so that a complete cooling loop is formed between the cooling pipeline inside the unit of the fuel cell and the heat-exchanging coil 6.

The first hot outlet 24 is disposed at the upper portion of the heat preservation water tank 2, the fuel cell combined supply system further includes a first water mixing valve 51, the first hot outlet 24 is communicated with a hot water inlet (a right side interface of the first water mixing valve 51 in fig. 1) of the first water mixing valve 51 through a pipeline, a cold water inlet (a lower side interface of the first water mixing valve 51 in fig. 1) of the first water mixing valve 51 is communicated with a third interface (an upper side interface of the three-way control valve 9 in fig. 1, the same applies below) of the three-way control valve 9 through a pipeline, a water mixing outlet (a left side interface of the first water mixing valve 51 in fig. 1) of the first water mixing valve 51 is communicated with a water supply switch through a pipeline, and a second cut-off valve 82 is disposed on a pipeline between the first hot outlet 24 and the hot water inlet of the first water mixing valve 51.

The second hot outlet 25 is disposed in the middle of the heat preservation water tank 2, the fuel cell cogeneration system further includes a second water mixing valve 52, the second hot outlet 25 is communicated with a hot water inlet of the second water mixing valve 52 (a right interface of the second water mixing valve 52 in fig. 1) through a pipeline, a cold water inlet of the second water mixing valve 52 (a left interface of the second water mixing valve 52 in fig. 1) is communicated with a third interface of the three-way control valve 9 through a pipeline, a mixed water outlet of the second water mixing valve 52 (a lower interface of the second water mixing valve 52 in fig. 1) is communicated with an inlet of the heating heat exchanger, and a third cut-off valve 83 is disposed on a pipeline between the second hot outlet 25 and the hot water inlet of the second water mixing valve 52. Heating heat exchanger is ground heating coil in this application, ground heating coil's import direct and the muddy water exit linkage of second muddy water valve 52, perhaps through the exit linkage of pipeline with second muddy water valve 52. The outlet of the floor heating coil can be communicated with the heat preservation water tank 2, such as a water replenishing port 23 communicated to the heat preservation water tank 2.

The fuel cell cogeneration system further comprises a radiator 7, an inlet of the radiator 7 is communicated with the cooling outlet 12, and an outlet of the radiator 7 is communicated with the cooling inlet 11. Specifically, the inlet of the radiator 7 communicates with a pipeline between the cooling outlet 12 and the first on-off valve 81, the outlet of the radiator 7 communicates with a pipeline between the heat exchange outlet 22 and the inlet of the first circulation pump 31, and a fourth on-off valve 84 is disposed on the inlet-side pipeline of the radiator 7.

The air conditioning unit 4 includes an absorber 41, a regulating valve 46, a steam generator 42, a condenser 43, a throttling element 44 and an evaporator 45 which are circularly communicated through a refrigerant pipeline, an ammonia water solution is stored in the absorber 41 and the steam generator 42, and a refrigerant recovery pipeline is further arranged between the steam generator 42 and the absorber 41.

Air conditioning unit 4 still includes heat exchange component, heat exchange component is heat exchanger 47 in this application, heat exchanger 47 has first import, first export, second import and second export, holding water box 2 still has return water mouth 26, first export 24 of using heat passes through the pipeline and communicates with first import, first export passes through pipeline and return water mouth 26 intercommunication, the second import passes through pipeline and steam generator 42's low temperature export intercommunication, the second export passes through pipeline and steam generator 42's high temperature import intercommunication. A fifth on-off valve 85 is arranged on a pipeline between the first heat outlet 24 and the first inlet, and an inlet of the fifth on-off valve 85 is communicated with a pipeline between the first heat outlet 24 and the second on-off valve 82. A second circulating pump 32 is arranged on a pipeline between the first outlet and the water return port 26, and a sixth on-off valve 86 is arranged between an outlet of the second circulating pump 32 and the water return port 26. The outlet of the second circulation pump 32 is further communicated with the inlet of the first water mixing valve 51 through a pipeline, the air conditioning unit 4 further comprises a seventh on-off valve 87, the inlet of the seventh on-off valve 87 is communicated with the pipeline between the second circulation pump 32 and the sixth on-off valve 86, and the outlet of the seventh on-off valve 87 is communicated with the pipeline between the inlet of the first water mixing valve 51 and the second on-off valve 82.

The fuel cell cogeneration system further comprises a first auxiliary heating unit and a second auxiliary heating unit (not shown in the figure), wherein the first auxiliary heating unit is arranged on the pipeline at the first heat outlet 24, and the second auxiliary heating unit is arranged on the pipeline between the mixed water outlet of the second mixed water valve 52 and the floor heating coil. The first and second auxiliary heating units may be electric heaters.

The operation of the fuel cell cogeneration system of the present application will be briefly described below.

After the system is started, the fuel cell unit 1 simultaneously generates electric energy and heat energy, and the electric energy is supplied to a user for use. When the temperature of the water in the hot water tank 2 does not reach the upper limit temperature threshold, the first on-off valve 81 and the first circulation pump 31 are first opened, the fourth on-off valve 84 is closed, and the water in the hot water tank 2 is heated by the cooling circuit. If the temperature of the water in the hot water tank 2 reaches the upper limit temperature threshold, the first on-off valve 81 is closed, the fourth on-off valve 84 is opened, and the fuel cell unit 1 is cooled and radiated by the radiator 7. When the water level in the heat preservation water tank 2 drops to the water supplementing level, the three-way control valve 9 is controlled to be switched to the state that the first interface is communicated with the second interface, and water is supplemented to the heat preservation water tank 2.

When a user has a domestic hot water demand, the second cut-off valve 82 is opened, the three-way control valve 9 is switched to the communication state of the first interface and the third interface, hot water at the top of the heat preservation water tank 2 and tap water are mixed in the first water mixing valve 51 and then are supplied to the user through the water supply switch, and when the water outlet temperature of the heat preservation water tank 2 is lower than a certain threshold value, the first auxiliary heating unit is opened to heat the outlet water of the first water mixing valve 51.

When a user has a heating demand, the third cut-off valve 83 is opened, the three-way control valve 9 is switched to a state that the first interface and the third interface are communicated, and hot water in the middle of the heat preservation water tank 2 and tap water are mixed in the second water mixing valve 52 and then are supplied to the floor heating coil to realize heating circulation. When the temperature of the outlet water of the heat preservation water tank 2 is lower than a certain threshold value, the second auxiliary heating unit is opened to heat the outlet water of the second water mixing valve 52.

When a user has a refrigeration demand, the fifth on-off valve 85, the sixth on-off valve 86 and the second circulating pump 32 are opened, hot water at the top of the heat preservation water tank 2 enters the heat exchanger 47 to realize heat exchange, and the water after heat exchange returns to the heat preservation water tank 2 through the water return port 26. When the temperature of the outlet water of the heat-preservation water tank 2 is lower than a certain threshold value, the first auxiliary heating unit is opened to heat the outlet water of the first heat outlet 24. The heat exchanger 47 transfers the heat energy to the steam generator 42, the strong ammonia water in the steam generator 42 is heated to generate ammonia vapor, and the heated and evaporated ammonia water solution returns to the absorber 41 through the refrigerant recovery pipeline. The ammonia vapor enters the condenser 43 and is condensed into liquid ammonia, and the liquid ammonia is throttled by the throttle element 44 and enters the evaporator 45, and absorbs heat from the room and is evaporated into ammonia vapor, whereby the room temperature is lowered. The ammonia vapor enters the absorber 41 and is absorbed by the ammonia water solution in the absorber 41, the concentration of the ammonia water solution is increased to become strong ammonia water, and the strong ammonia water returns to the steam generator 42 again to participate in circulation after passing through the regulating valve 46.

When a user has refrigeration demand and domestic hot water demand at the same time, the fifth on-off valve 85, the seventh on-off valve 87 and the second circulating pump 32 are opened, the three-way control valve 9 is switched to a state of communicating the first port with the third port, hot water at the top of the heat-insulating water tank 2 enters the heat exchanger 47 to realize heat exchange, and water after heat exchange and tap water are mixed in the first water mixing valve 51 and then are supplied to the user through the water supply switch. When the temperature of the outlet water of the heat preservation water tank 2 is lower than a certain threshold value, the first auxiliary heating unit is opened to heat the outlet water of the first water mixing valve 51.

By providing the first heat outlet 24 at the upper portion of the insulated water tank 2, heat can be supplied using high-temperature water at the upper portion of the insulated water tank 2, thereby improving the heat supply effect. By providing the water replenishing port 23 in the lower portion of the heat-insulating water tank 2, the temperature impact of the replenished water on the inside of the heat-insulating water tank 2 can be reduced. Through set up heat exchange coil 6 in heat preservation water tank 2, can utilize heat exchange coil 6 to form solitary cooling circuit, reduce the temperature fluctuation of business turn over fuel cell unit 1, guarantee fuel cell unit 1's reaction stability. Through setting up second hot outlet 25, can utilize the water in holding water box 2 to supply heat, improve heat utilization rate. Through setting up second hot outlet 25 in holding water tank 2 middle part, can utilize the water in holding water tank 2 middle part to heat, improve the heating effect. By providing the radiator 7, the fuel cell unit 1 can be radiated by the radiator 7, and the operation stability of the fuel cell unit 1 is ensured. The air conditioning unit 4 adopts an ammonia refrigeration mode, so that the applicable temperature range of refrigeration is wider. By utilizing the direct or indirect heat exchange between the hot water at the first heat outlet 24 and the steam generator 42, the waste heat refrigeration of the fuel cell unit 1 can be realized, the heat energy utilization rate is improved, and the cold, heat and electricity requirements of users are met.

It should be noted that the above preferred embodiments are only used for illustrating the principle of the present application, and are not intended to limit the scope of the present application. Without departing from the principles of the present application, those skilled in the art can adjust the setting manner, so that the present application can be applied to more specific application scenarios.

For example, although the above embodiment is described with reference to the heat exchange member being the heat exchanger 47 in an alternative embodiment, this is merely a preferred embodiment and those skilled in the art can modify the heat exchange member without departing from the principles of the present application.

For example, in an alternative embodiment, the heat exchange component is the steam generator 42 of the air conditioning unit 4, the steam generator 42 has a high temperature inlet, a low temperature outlet, a refrigerant inlet and a refrigerant outlet, the first heat outlet 24 is communicated with the high temperature inlet, the low temperature outlet is communicated with the water return port 26, the refrigerant inlet is communicated with the outlet of the absorber 41, and the refrigerant outlet is communicated with the condenser 43.

As another example, the air conditioning unit 4 may be replaced by a conventional fluorine-added air conditioner, that is, an air conditioner including a compressor, a condenser 43, a throttling element 44, and an evaporator 45, in which case the heat exchanging component is the evaporator 45 in the fluorine-added air conditioner, the evaporator 45 includes a first inlet, a first outlet, a second inlet, and a second outlet, the first heat outlet 24 is communicated with the first inlet, the first outlet is communicated with the water return port 26, the second inlet is communicated with the throttling element 44, and the second outlet is communicated with the compressor.

As another example, in another alternative embodiment, the position of the first circulation pump 31 is not constant, and in other embodiments, the first circulation pump 31 may be disposed on the pipeline at the cooling outlet 12. For example, the outlet line of the radiator 7 and the heat exchange outlet 22 may be provided with circulation pumps.

For another example, in another alternative embodiment, the arrangement of the seven on-off valves is merely exemplary, and a person skilled in the art may adjust the arrangement, the number, and the like of the seven on-off valves based on an actual application scenario. For example, the first on-off valve 81 and the fourth on-off valve 84 may be replaced with a three-way control valve 9, and the second on-off valve 82 and the fifth on-off valve 85 may be replaced with a three-way control valve 9, and the like.

As another example, in another alternative embodiment, although the above embodiment is described with the first outlet of the heat exchanger 47 communicating with both the hot water inlet of the first mixing valve 51 and the water return port 26, this arrangement is not exclusive, and in other embodiments, the first outlet of the heat exchanger 47 may communicate with only one of the hot water inlet of the first mixing valve 51 and the water return port 26.

For another example, in another alternative embodiment, the above embodiment is described in conjunction with the heat exchange coil 6 arranged in the heat preservation water tank 2, but this arrangement is not a permanent one, and in other application manners, the heat exchange coil 6 may be arranged on the outer wall of the water tank, or the heat exchange coil 6 is not arranged, but the water in the heat preservation water tank 2 is used to cool the fuel cell unit 1.

As another example, in another alternative embodiment, although the above embodiment is described in connection with the provision of the second heat outlet 25, the second heat outlet 25 is not essential, and one skilled in the art may select whether to omit it based on the actual application scenario.

For another example, although the above embodiment describes each opening position of the holding water tank 2 in detail, this is only a preferred embodiment, and those skilled in the art can adjust the setting positions of the openings based on the actual application scenario, and the adjustment does not depart from the scope of the present application.

For another example, the components such as the first mixing valve 51, the second mixing valve 52, and the radiator 7 are not essential, and one skilled in the art may selectively omit at least one of them.

Of course, the above alternative embodiments, and the alternative embodiment and the preferred embodiment may also be used in a cross-matching manner, so that a new embodiment is combined to be suitable for a more specific application scenario.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims of the present application, any of the claimed embodiments may be used in any combination.

So far, the technical solutions of the present application have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present application is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the present application, and the technical scheme after the changes or substitutions will fall into the protection scope of the present application.

Claims (10)

1. A fuel cell co-generation system, characterized by comprising:

a fuel cell unit having a cooling inlet and a cooling outlet;

the heat-preserving water tank is provided with a heat exchange inlet, a heat exchange outlet, a water replenishing port and a first heat outlet, the heat exchange inlet is communicated with the cooling outlet, the heat exchange outlet is communicated with the cooling inlet, and the water replenishing port is communicated with a water source;

a first circulation pump configured to circulate a coolant between the fuel cell unit and the warm water tank;

the air conditioning unit comprises a heat exchange component, the heat exchange component comprises a first inlet, a first outlet, a second inlet and a second outlet, and the first heat outlet is communicated with the first inlet.

2. The fuel cell cogeneration system according to claim 1, wherein the first heat outlet is provided at an upper portion of the hot-water storage tank, and/or the water replenishment port is provided at a lower portion of the hot-water storage tank.

3. The fuel cell co-generation system according to claim 1, further comprising a first water mixing valve, wherein a hot water inlet of the first water mixing valve is communicated with the first hot outlet, a cold water inlet of the first water mixing valve is communicated with a water source, and a water mixing outlet of the first water mixing valve is communicated with a water supply switch.

4. The fuel cell combined supply system according to claim 1, wherein a heat exchange coil is further arranged in the heat-preservation water tank, and two ends of the heat exchange coil are respectively communicated with the heat exchange inlet and the heat exchange outlet.

5. The fuel cell co-generation system according to claim 1, wherein the heat-retaining water tank further has a second heat outlet that is communicable with an inlet of a heating heat exchanger.

6. The fuel cell cogeneration system of claim 5, wherein the second heat outlet is provided in the middle of the holding water tank.

7. The fuel cell cogeneration system of claim 5, further comprising a second mixing valve, wherein the hot water inlet of the second mixing valve is in communication with the second hot outlet, the cold water inlet of the second mixing valve is in communication with a water source, and the mixing outlet of the second mixing valve is in communication with the inlet of the heating heat exchanger.

8. The fuel cell co-supply system according to claim 1, further comprising a radiator, an inlet of the radiator being in communication with the cooling outlet, and an outlet of the radiator being in communication with the cooling inlet.

9. The fuel cell cogeneration system of claim 1, wherein the air conditioning unit comprises an absorber, a steam generator, a condenser, a throttling element, and an evaporator in circulating communication through a refrigerant pipe, the absorber and the steam generator storing an aqueous ammonia solution therein,

the heat exchange component is the steam generator, the steam generator has first import, first export the second import with the second export, holding water box still has the return water mouth, first export with return water mouth intercommunication, the second import with the export intercommunication of absorber, the second export with the condenser intercommunication.

10. The fuel cell cogeneration system of claim 1, wherein the air conditioning unit comprises an absorber, a steam generator, a condenser, a throttling element, and an evaporator in circulating communication through a refrigerant pipe, the absorber and the steam generator storing an aqueous ammonia solution therein,

the heat exchange component is a heat exchanger, the heat exchanger is provided with the first inlet, the first outlet, the second inlet and the second outlet, the heat preservation water tank is also provided with a water return port, the first outlet is communicated with the water return port, the second inlet is communicated with the low-temperature outlet of the steam generator, and the second outlet is communicated with the high-temperature inlet of the steam generator.

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