CN221054780U

CN221054780U - Air supply system

Info

Publication number: CN221054780U
Application number: CN202322943544.9U
Authority: CN
Inventors: 孙鹏; 赵明
Original assignee: Weishi Energy Technology Co Ltd
Current assignee: Weishi Energy Technology Co Ltd
Priority date: 2023-11-01
Filing date: 2023-11-01
Publication date: 2024-05-31
Anticipated expiration: 2033-11-01

Abstract

The utility model discloses an air supply system, comprising: the compression device is suitable for conveying gas to the gas storage device; the buffer container is positioned at the downstream of the gas storage device and is communicated with the gas filling machine; the first valve body is connected between the gas storage device and the buffer container, and is configured to be opened when the gas pressure in the buffer container is smaller than the required pressure of the gas dispenser. Therefore, through the arrangement of the buffer container and the first valve body, the first valve body can be opened when the gas pressure in the buffer container is smaller than the required pressure of the gas dispenser, so that the gas storage device supplies gas to the buffer container, the gas with higher pressure output by the gas storage device can be expanded and depressurized after entering the buffer container, and the gas pressure in the buffer container can be increased, so that the required pressure of the gas dispenser is achieved, and in addition, the gas expansion and depressurization can not cause gas temperature rise, so that the gas does not need to be cooled or only needs to be cooled by a small-power working device, and the energy conservation is facilitated.

Description

Air supply system

Technical Field

The utility model relates to the field of air supply, in particular to an air supply system.

Background

In the related art, the gas supply system is used for supplying gas to the device to be supplemented with gas, for example, the hydrogen supply system can supply hydrogen to the pressure of the vehicle-mounted gas cylinder, however, according to the hydrogenation standard SAEJ-2601, in the hydrogen supply process, the charging pressure of the hydrogenation machine of the hydrogen supply system needs to be changed along with the change of the pressure of the vehicle-mounted gas cylinder.

The conventional hydrogenation station uses a pressure control valve to reduce the pressure of the gas conveyed to the hydrogenation machine by a hydrogenation station gas storage tank, but because the decoction coke coefficient of the hydrogen is smaller than 1, the temperature of the hydrogen can rise after passing through the pressure control valve, so that a cooling device is required to work at a high power to cool the hydrogen, the energy consumption is increased, and the energy conservation is not facilitated.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the utility model is to propose a gas supply system which is advantageous for saving energy.

The air supply system according to the present utility model includes: the compression device is suitable for compressing gas and conveying the compressed gas to the gas storage device; the buffer container is positioned at the downstream of the gas storage device and is communicated with the gas dispenser, and the gas dispenser is suitable for supplying gas to the device to be supplemented; the first valve body is connected between the gas storage device and the buffer container and is configured to be opened when the gas pressure in the buffer container is smaller than the required pressure of the gas dispenser; and the energy recovery device is positioned at the downstream of the first valve body and is communicated between the first valve body and the buffer container.

According to the gas supply system, the buffer container and the first valve body are arranged, the first valve body can be opened when the gas pressure in the buffer container is smaller than the required pressure of the gas dispenser, so that the gas storage device supplies gas to the buffer container, the gas with higher pressure output by the gas storage device can expand and reduce pressure after entering the buffer container and can increase the gas pressure in the buffer container so as to reach the required pressure of the gas dispenser, and the gas expansion and reduction pressure does not cause gas temperature rise, so that the gas does not need to be cooled or only needs to work with low power by the cooling device, and the gas supply system is beneficial to saving energy.

In some examples of the utility model, the energy recovery device is in driving connection with the compression device.

In some examples of the utility model, the air supply system further comprises: the first cooling device is positioned at the downstream of the buffer container and communicated between the buffer container and the gas dispenser, and is used for reducing the temperature of gas flowing to the gas dispenser.

In some examples of the present utility model, the plurality of gas storage devices are variable-frequency compression devices, at least two of the plurality of gas storage devices have different working pressures, the plurality of gas storage devices are connected in parallel and are selectively communicated with the compression devices, and the plurality of gas storage devices are selectively communicated with the buffer container.

In some examples of the present utility model, the plurality of gas storage devices includes at least a first gas storage device and a second gas storage device, the working pressure of the first gas storage device is a first pressure value, the working pressure of the second gas storage device is a second pressure value, and the first pressure value is smaller than the second pressure value.

In some examples of the present utility model, the plurality of first valve bodies are connected between each gas storage device and the buffer container, and when the gas pressure in the buffer container is smaller than the required pressure of the gas dispenser, the corresponding first valve bodies are controlled to open or close according to the gas pressure in the buffer container and the working pressure of the gas storage device.

In some examples of the present utility model, the gas pressure in the buffer container is less than the first pressure value, the first valve body corresponding to the first gas storage device is opened, and the first valve body corresponding to the second gas storage device is closed; the gas pressure in the buffer container is larger than or equal to the first pressure value and smaller than the second pressure value, the first valve body corresponding to the first gas storage device is closed, and the first valve body corresponding to the second gas storage device is opened.

In some examples of the utility model, the air supply system further comprises: and the second valve bodies are connected between each gas storage device and each compression device, and the corresponding second valve bodies are controlled to be opened and closed according to the gas pressure output by the compression device and the working pressure of the gas storage device.

In some examples of the present utility model, the gas pressure output by the compression device is greater than the first pressure value and less than or equal to the second pressure value, a second valve body corresponding to the first gas storage device is opened, and the first valve body corresponding to the second gas storage device is closed; the gas pressure output by the compression device is larger than the second pressure value, the second valve body corresponding to the first gas storage device is closed, and the first valve body corresponding to the second gas storage device is opened.

In some examples of the utility model, the air supply system further comprises: and a second cooling device upstream of the compression device for reducing the temperature of the gas flowing to the compression device.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a schematic diagram of an air supply system according to an embodiment of the present utility model.

Reference numerals:

A gas supply system 100;

A compression device 10;

A gas storage device 20; a first gas storage device 21; a second gas storage device 22; a third gas storage device 23;

A buffer container 30;

A dispenser 40;

a first valve body 50; a second valve body 51;

an energy recovery device 60; a first cooling device 61; a gas source 62; a second cooling device 63;

a first pressure sensor 70; a second pressure sensor 71.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

An air supply system 100 according to an embodiment of the present utility model is described below with reference to fig. 1. The gas supply system 100 described in the present utility model may be used to supply various gases to the device to be supplied with gas, and the present utility model is described taking an example in which the gas supply system 100 may be used to supply hydrogen to the device to be supplied with gas.

As shown in fig. 1, an air supply system 100 according to an embodiment of the present utility model includes: compression device 10, gas storage device 20, buffer container 30, dispenser 40, and first valve body 50.

Wherein the compression device 10 is adapted to deliver gas to the gas storage device 20, in particular the compression device 10 is adapted to compress gas and deliver the compressed gas to the gas storage device 20. As some alternative embodiments of the present application, the compression device 10 is adapted to deliver hydrogen to the gas storage device 20, and the compression device 10 may be disposed upstream of the gas storage device 20 along the flow direction of the hydrogen, and a gas source 62 (e.g., a hydrogen gas source 62) may be further disposed upstream of the compression device 10, and the compression device 10 may pressurize and deliver the hydrogen in the hydrogen gas source 62 to the gas storage device 20. The gas storage device 20 is capable of storing hydrogen gas and outputting the hydrogen gas at a rated pressure.

The buffer container 30 is located downstream of the gas storage device 20, the gas storage device 20 can output rated pressure gas to the buffer container 30, the buffer container 30 is communicated with the gas dispenser 40, the gas dispenser 40 is suitable for supplying gas to the device to be supplemented, and for example, the gas dispenser 40 can supply hydrogen to the pressure of the vehicle-mounted gas cylinder. The first valve body 50 is connected between the gas storage device 20 and the buffer container 30, and the first valve body 50 is configured to be opened when the gas pressure in the buffer container 30 is less than the required pressure of the dispenser 40.

It should be noted that, according to the hydrogenation standard SAEJ-2601, during the hydrogen supplying process, the charging pressure of the gas dispenser 40 of the gas supply system 100 needs to be changed according to the device to be replenished (for example, the pressure of the vehicle-mounted gas cylinder). That is, when the vehicle-mounted gas cylinder pressure is low initially, the gas dispenser 40 also needs to have a low inflation pressure, and as the vehicle-mounted gas cylinder pressure gradually increases, the gas dispenser 40 also needs to have a high inflation pressure.

In the prior art, the pressure control valve is used for controlling the gas pressure of the gas storage tank to be conveyed to the hydrogenation machine, but the soup coke coefficient of the hydrogen is smaller than 1, so that the temperature of the hydrogen rises after passing through the pressure control valve, and a cooling device is required to work at high power to cool the hydrogen, so that the energy consumption is increased, and the energy conservation is not facilitated.

In the present application, the buffer container 30 and the first valve body 50 are provided, the first valve body 50 may be opened when the gas pressure in the buffer container 30 is less than the required pressure of the dispenser 40, and when the first valve body 50 is opened, the gas storage device 20 communicates with the buffer container 30, and the gas storage device 20 can output the gas of the rated pressure to the buffer container 30. It can be understood that the gas pressure output from the gas storage device 20 to the buffer container 30 is higher, the gas output from the gas storage device 20 can be expanded and depressurized after entering the buffer container 30, the gas pressure in the buffer container 30 can be increased, and the temperature of the hydrogen gas can not rise after expanding, so that the gas does not need to be cooled or only needs to be cooled by a small power of the cooling device, and the energy saving is facilitated.

It should be noted that, even if the gas outputted from the gas storage device 20 is expanded and depressurized after entering the buffer container 30, it is possible to raise the gas pressure in the buffer container 30.

For example, the rated pressure of the gas outputted from the gas storage device 20 is 30 mpa, the required pressure of the gas dispenser 40 is 10 mpa at a certain time, and the gas pressure in the buffer container 30 is 8 mpa, at this time, the gas pressure in the buffer container 30 is smaller than the required pressure of the gas dispenser 40, the first valve body 50 is opened, the gas storage device 20 outputs a certain amount of hydrogen gas with a pressure of 30 mpa to the buffer container 30, the certain amount of hydrogen gas with a pressure of 30 mpa is inflated and depressurized after entering the buffer container 30, and the gas pressure in the buffer container 30 can be increased to make the gas pressure in the buffer container 30 reach 10 mpa so that the gas pressure in the buffer container 30 satisfies the required pressure of the gas dispenser 40 (for example, the gas pressure in the buffer container 30 is equal to the required pressure of the gas dispenser 40).

After a period of time, the required pressure of the gas dispenser 40 is 15 mpa and the gas pressure in the buffer container 30 is 10 mpa, at this time, the gas pressure in the buffer container 30 is smaller than the required pressure of the gas dispenser 40, the first valve body 50 is opened, the gas storage device 20 outputs a certain amount of hydrogen gas with a pressure of 30 mpa to the buffer container 30, the certain amount of hydrogen gas with a pressure of 30 mpa enters the buffer container 30 and then expands and reduces the pressure, and the gas pressure in the buffer container 30 can be increased to make the gas pressure in the buffer container 30 reach 15 mpa, so that the gas pressure in the buffer container 30 meets the required pressure of the gas dispenser 40 (for example, the gas pressure in the buffer container 30 is equal to the required pressure of the gas dispenser 40).

It should be noted that the first valve body 50 does not have to be opened all the time, and the first valve body 50 may be opened intermittently, that is, the first valve body 50 may be closed after being opened for a certain period of time, for example, when the gas pressure in the buffer container 30 meets the requirement pressure of the gas dispenser 40 (for example, the gas pressure in the buffer container 30 is equal to the requirement pressure of the gas dispenser 40), the first valve body 50 may be controlled to be closed.

As some alternative embodiments of the present application, the gas supply system 100 may further include a controller, which may be used to obtain the required pressure of the gas dispenser 40, and a first pressure sensor 70 may be disposed in the buffer container 30, the first pressure sensor 70 being configured to detect the gas pressure in the buffer container 30, and the controller may be used to obtain the gas pressure information detected by the first pressure sensor 70, and the controller may control the opening and closing of the first valve body 50 according to the required pressure of the gas dispenser 40 and the gas pressure in the buffer container 30.

In short, the buffer container 30 and the first valve body 50 are arranged to replace a pressure control valve (the pressure control valve is entropy increasing throttling equipment) in the prior art, so that the inflation pressure of the gas dispenser 40 can meet the requirement on the basis of not increasing the temperature of hydrogen, the hydrogen is not required to be cooled or only a cooling device is required to work with low power, and the energy conservation is facilitated.

It will be appreciated that the present application may be configured with cooling means to cool the hydrogen gas flowing from the buffer vessel 30 to the dispenser 40, or may not be configured between the buffer vessel 30 and the dispenser 40 as the case may be.

Therefore, by arranging the buffer container 30 and the first valve body 50, the first valve body 50 can be opened when the gas pressure in the buffer container 30 is smaller than the required pressure of the gas dispenser 40, so that the gas storage device 20 supplies gas to the buffer container 30, the gas with higher pressure output by the gas storage device 20 can be expanded and depressurized after entering the buffer container 30, and the gas pressure in the buffer container 30 can be increased, so that the required pressure of the gas dispenser 40 can be achieved, and the gas expansion depressurization does not cause gas temperature rise, so that the gas does not need to be cooled or only needs to be cooled by a small power operation, and the energy saving is facilitated.

It will be appreciated that the gas pressure within buffer vessel 30 will also rise gradually over time as the dispenser 40 is required to provide gas at a gradual rise in pressure over time during actual operation.

In some embodiments of the present utility model, as shown in fig. 1, the air supply system 100 may further include: energy recovery device 60, energy recovery device 60 may be located downstream of first valve body 50, and energy recovery device 60 may be in communication between first valve body 50 and buffer vessel 30. When the gas storage device 20 supplies gas to the buffer container 30, the gas with higher pressure output from the gas storage device 20 can drive the energy recovery device 60 to operate so as to recover a part of the energy of the gas with higher pressure output from the gas storage device 20.

It will be appreciated that after the gas with higher pressure output from the gas storage device 20 passes through the energy recovery device 60, the pressure of the gas output from the gas storage device 20 will be slightly reduced, which meets the requirement of reducing the pressure after the gas enters the buffer container 30, and also can recover a part of energy, which is beneficial to saving energy.

As some alternative embodiments of the present application, the energy recovery device 60 may be configured as a turbine. As some alternative embodiments of the present application, the energy recovery device 60 may be configured as a generator.

In some embodiments of the present utility model, the energy recovery device 60 may be in driving connection with the compression device 10 to provide the energy recovered by the energy recovery device 60 to the compression device 10, and as some alternative embodiments of the present utility model, the energy recovery device 60 may be configured as a turbine, the gas with higher pressure output from the gas storage device 20 may be capable of driving the turbine of the turbine to rotate, and the turbine of the turbine may be in driving connection with the impeller of the compression device 10, and the turbine of the turbine may be capable of driving the impeller of the compression device 10 to rotate when rotating. Such an arrangement may reduce the power used by the compressor 10, which may be beneficial for energy savings.

As some alternative embodiments of the application, the energy recovery device 60 may be drivingly connected to a generator to use the energy recovered by the energy recovery device 60 for generating electricity.

In some embodiments of the present utility model, as shown in fig. 1, the air supply system 100 may further include: a first cooling device 61, the first cooling device 61 may be located downstream of the buffer vessel 30, and the first cooling device 61 may be in communication between the buffer vessel 30 and the dispenser 40, the first cooling device 61 for reducing the temperature of the gas flowing to the dispenser 40. That is, the hydrogen gas supplied from the buffer container 30 to the gas dispenser 40 can flow through the first cooling device 61, and the temperature of the hydrogen gas flowing through the first cooling device 61 can be reduced when the first cooling device 61 is started, so that the hydrogen gas supplied to the device to be supplemented can meet the use requirement.

It should be noted that, if the temperature of the hydrogen gas supplied from the buffer vessel 30 to the dispenser 40 is not high, the first cooling device 61 may not be operated. Furthermore, the application can make the first cooling device 61 work with low power by arranging the buffer container 30 and the first valve body 50, which is beneficial to saving energy.

In some embodiments of the present utility model, as shown in fig. 1, the number of the gas storage devices 20 may be set to be plural, the compression device 10 may be configured as a variable frequency compression device 10, at least two of the plurality of gas storage devices 20 may have different operating pressures, the plurality of gas storage devices 20 may be disposed in parallel, and each of the plurality of gas storage devices 20 may be selectively communicated with the compression device 10.

As some alternative embodiments of the present application, the operating pressures of the plurality of gas storage devices 20 are all different, and the operating pressure of the gas storage device 20 may be understood as the rated pressure of the gas outputted from the gas storage device 20. It will be appreciated that the variable frequency compression device 10 may output hydrogen at different pressures, for example, the variable frequency compression device 10 may gradually output hydrogen from a low pressure to a high pressure.

It should be explained that the existing compressor of the hydrogenation station is a fixed-frequency compressor, and only one air storage tank is provided, the fixed-frequency compressor needs to output hydrogen with high pressure to the air storage tank so as to meet the use requirement, which can result in high energy consumption of the compressor. In the present application, by providing a plurality of gas storage devices 20 having different working pressures and configuring the compression device 10 as the variable frequency compression device 10, the variable frequency compression device 10 can be selectively communicated with one or more of the gas storage devices 20 according to the pressure of the hydrogen output by the variable frequency compression device 10, which is beneficial to reducing the energy consumption of the variable frequency compression device 10.

For example, as some alternative embodiments of the present application, the plurality of gas storage devices 20 may include at least a first gas storage device 21 and a second gas storage device 22, the operating pressure of the first gas storage device 21 may be a first pressure value, and the operating pressure of the second gas storage device 22 may be a second pressure value, the first pressure value being smaller than the second pressure value. As some alternative embodiments of the application, the first pressure value may be 15 mpa and the second pressure value may be 30 mpa.

When the pressure of the hydrogen output from the compression device 10 is greater than 15 mpa (first pressure value) and less than or equal to 30 mpa (second pressure value), the compression device 10 is in communication with the first gas storage device 21, and the compression device 10 is not in communication with the second gas storage device 22, and at this time, the compression device 10 may supply the first gas storage device 21 with gas. When the pressure of the hydrogen output from the compression device 10 is greater than 30 mpa (second pressure value), the compression device 10 is not communicated with the first gas storage device 21, the compression device 10 is communicated with the second gas storage device 22, and at this time, the compression device 10 can supply the gas to the second gas storage device 22. Compared with the prior art, the prior art can only output hydrogen with the pressure of more than 30 megapascals to supply gas for the gas storage tank.

Therefore, the present application is advantageous in reducing the energy consumption of the compression device 10 and in saving energy by providing a plurality of gas storage devices 20 having different working pressures and constructing the compression device 10 as a variable frequency compression device 10. Also, a plurality of gas storage devices 20 may be selectively communicated with the buffer container 30. It will be appreciated that by providing a plurality of gas storage devices 20 having different working pressures, the gas storage devices 20 having different working pressures may be selected to supply gas to the buffer container 30 according to the gas pressure value in the buffer container 30, for example, if the gas pressure value in the buffer container 30 is less than 15 mpa (first pressure value), the gas may be supplied to the buffer container 30 through the first gas storage device 21, and if the gas pressure value in the buffer container 30 is greater than or equal to 15 mpa (first pressure value) and less than 30 mpa (second pressure value), the gas may be supplied to the buffer container 30 through the second gas storage device 22.

Moreover, the plurality of air storage devices 20 can be supplied by one variable frequency compression device 10, which is beneficial to reducing the cost.

As some alternative embodiments of the present application, as shown in fig. 1, the plurality of gas storage devices 20 may include a first gas storage device 21, a second gas storage device 22, and a third gas storage device 23, where the working pressure of the first gas storage device 21 is a first pressure value, the working pressure of the second gas storage device 22 is a second pressure value, and the working pressure of the third gas storage device 23 is a third pressure value, the first pressure value is smaller than the second pressure value, and the second pressure value is smaller than the third pressure value. As some alternative embodiments of the application, the first pressure value may be 15 mpa, the second pressure value may be 30 mpa, and the third pressure value may be 50 mpa.

When the pressure of the hydrogen output from the compression device 10 is greater than 15 mpa (first pressure value) and less than or equal to 30 mpa (second pressure value), the compression device 10 is in communication with the first gas storage device 21, the compression device 10 is not in communication with the second gas storage device 22, and the compression device 10 is not in communication with the third gas storage device 23, at which time the compression device 10 may supply gas to the first gas storage device 21.

When the pressure of the hydrogen output from the compression device 10 is greater than 30 mpa (second pressure value) and equal to or less than 50 mpa (third pressure value), the compression device 10 is not communicated with the first gas storage device 21, the compression device 10 is communicated with the second gas storage device 22, and the compression device 10 is not communicated with the third gas storage device 23, and at this time, the compression device 10 can supply gas to the second gas storage device 22.

When the pressure of the hydrogen output from the compression device 10 is greater than 50mpa (third pressure value), the compression device 10 is not communicated with the first gas storage device 21, the compression device 10 is not communicated with the second gas storage device 22, and the compression device 10 is communicated with the third gas storage device 23, and at this time, the compression device 10 can supply gas to the third gas storage device 23.

In some embodiments of the present utility model, as shown in fig. 1, the number of the first valve bodies 50 may be plural, and a first valve body 50 may be connected between each gas storage device 20 and the buffer container 30, and when the gas pressure in the buffer container 30 is smaller than the required pressure of the gas dispenser 40, the corresponding first valve body 50 may be controlled to open or close according to the gas pressure in the buffer container 30 and the working pressure of the gas storage device 20. As some alternative embodiments of the present utility model, the number of first valve bodies 50 may be the same as the number of gas storage devices 20, and a plurality of first valve bodies 50 may be provided in one-to-one correspondence with a plurality of gas storage devices 20.

As some alternative embodiments of the present application, the plurality of gas storage devices 20 may include a first gas storage device 21 and a second gas storage device 22, the operating pressure of the first gas storage device 21 may be a first pressure value, and the operating pressure of the second gas storage device 22 may be a second pressure value, the first pressure value being smaller than the second pressure value. As some alternative embodiments of the application, the first pressure value may be 15 mpa and the second pressure value may be 30 mpa.

A first valve body 50 may be connected between the first gas storage device 21 and the buffer container 30, and a first valve body 50 may be connected between the second gas storage device 22 and the buffer container 30. When the gas pressure in the buffer container 30 is smaller than the required pressure of the gas dispenser 40, the gas pressure in the buffer container 30 may be obtained, if the gas pressure in the buffer container 30 is smaller than 15 mpa (first pressure value), the first valve body 50 corresponding to the first gas storage device 21 may be opened, and the first valve body 50 corresponding to the second gas storage device 22 may be closed, at this time, the first gas storage device 21 may provide the buffer container 30 with 15 mpa (first pressure value) of hydrogen, and the 15 mpa (first pressure value) of hydrogen may be expanded and depressurized after entering the buffer container 30, and may increase the gas pressure in the buffer container 30 to make the gas pressure in the buffer container 30 satisfy the required pressure of the gas dispenser 40.

If the gas pressure in the buffer container 30 is greater than or equal to 15 mpa (first pressure value) and less than 30 mpa (second pressure value), the first valve body 50 corresponding to the first gas storage device 21 may be closed, and the first valve body 50 corresponding to the second gas storage device 22 may be opened, at this time, the second gas storage device 22 may provide 30 mpa (second pressure value) of hydrogen gas to the buffer container 30, and the 30 mpa (second pressure value) of hydrogen gas may be expanded and depressurized after entering the buffer container 30, and the gas pressure in the buffer container 30 may be increased to make the gas pressure in the buffer container 30 meet the required pressure of the gas dispenser 40.

A first valve body 50 may be connected between the first air storage device 21 and the buffer container 30, a first valve body 50 may be connected between the second air storage device 22 and the buffer container 30, and a first valve body 50 may be connected between the third air storage device 23 and the buffer container 30. When the gas pressure in the buffer container 30 is lower than the required pressure of the gas dispenser 40, the gas pressure in the buffer container 30 may be obtained, and if the gas pressure in the buffer container 30 is lower than 15 mpa (first pressure value), the first valve body 50 corresponding to the first gas storage device 21 may be opened, the first valve body 50 corresponding to the second gas storage device 22 may be closed, and the first valve body 50 corresponding to the third gas storage device 23 may be closed, and at this time, the first gas storage device 21 may supply the buffer container 30 with hydrogen gas of 15 mpa (first pressure value).

If the gas pressure in the buffer container 30 is 15 mpa (first pressure value) or more and 30 mpa (second pressure value) or less, the first valve body 50 corresponding to the first gas storage device 21 may be closed, the first valve body 50 corresponding to the second gas storage device 22 may be opened, and the first valve body 50 corresponding to the third gas storage device 23 may be closed, and at this time, the second gas storage device 22 may supply 30 mpa (second pressure value) of hydrogen gas to the buffer container 30. If the gas pressure in the buffer container 30 is 30 mpa (second pressure value) or more and 50 mpa (third pressure value) or less, the first valve body 50 corresponding to the first gas storage device 21 may be closed, the first valve body 50 corresponding to the second gas storage device 22 may be closed, and the first valve body 50 corresponding to the third gas storage device 23 may be opened, and at this time, the third gas storage device 23 may supply 50 mpa (third pressure value) of hydrogen gas to the buffer container 30. The first valve body 50 is opened and closed according to the gas pressure in the buffer container 30 and the operating pressure of the gas storage device 20, so that hydrogen gas is supplied to the buffer container 30, and hydrogen gas with a proper pressure value can be supplied to the buffer container 30.

In some embodiments of the present utility model, as shown in fig. 1, the air supply system 100 may further include: a plurality of second valve bodies 51 may be connected between each gas storage device 20 and the compression device 10, and the corresponding second valve bodies 51 may be controlled to open or close according to the gas pressure output from the compression device 10 and the working pressure of the gas storage device 20. As some alternative embodiments of the present utility model, the number of the second valve bodies 51 may be the same as the number of the gas storage devices 20, and the plurality of second valve bodies 51 may be provided in one-to-one correspondence with the plurality of gas storage devices 20.

When the pressure of the hydrogen gas outputted from the compression device 10 is greater than 15 mpa (first pressure value) and less than or equal to 30 mpa (second pressure value), the second valve body 51 corresponding to the first gas storage device 21 is opened, and the second valve body 51 corresponding to the second gas storage device 22 is closed, at this time, the compression device 10 may supply the gas to the first gas storage device 21. When the pressure of the hydrogen output from the compression device 10 is greater than 30 mpa (second pressure value), the second valve body 51 corresponding to the first gas storage device 21 is closed, and the second valve body 51 corresponding to the second gas storage device 22 is opened, and at this time, the compression device 10 may supply the gas to the second gas storage device 22.

When the pressure of the hydrogen gas outputted from the compression device 10 is greater than 15 mpa (first pressure value) and less than or equal to 30 mpa (second pressure value), the second valve body 51 corresponding to the first gas storage device 21 is opened, the second valve body 51 corresponding to the second gas storage device 22 is closed, and the second valve body 51 corresponding to the third gas storage device 23 is closed, at this time, the compression device 10 may supply the gas to the first gas storage device 21.

When the pressure of the hydrogen gas output from the compression device 10 is greater than 30 mpa (second pressure value) and equal to or less than 50 mpa (third pressure value), the second valve body 51 corresponding to the first gas storage device 21 is closed, the second valve body 51 corresponding to the second gas storage device 22 is opened, and the second valve body 51 corresponding to the third gas storage device 23 is closed, at this time, the compression device 10 may supply the gas to the second gas storage device 22.

When the pressure of the hydrogen output from the compression device 10 is greater than 50 mpa (third pressure value), the second valve body 51 corresponding to the first gas storage device 21 is closed, the second valve body 51 corresponding to the second gas storage device 22 is closed, and the second valve body 51 corresponding to the third gas storage device 23 is opened, and at this time, the compression device 10 may supply the third gas storage device 23 with gas. The arrangement can supply air for a plurality of air storage devices 20 through one variable-frequency compression device 10, thereby being beneficial to reducing the cost, and the arrangement is beneficial to reducing the energy consumption of the compression device 10 and saving the energy.

As some alternative embodiments of the present application, as shown in fig. 1, a second pressure sensor 71 may be disposed between the second valve body 51 and the compression device 10, the second pressure sensor 71 may be configured to detect the gas pressure output from the compression device 10, a controller may be configured to acquire the gas pressure information detected by the second pressure sensor 71, and the controller may control the opening and closing of the plurality of second valve bodies 51 according to the gas pressure output from the compression device 10.

In some embodiments of the present utility model, as shown in fig. 1, the air supply system 100 may further include: a second cooling device 63, the second cooling device 63 may be located upstream of the compression device 10, and the second cooling device 63 may be used to reduce the temperature of the gas flowing to the compression device 10.

As some alternative embodiments of the present application, the second cooling device 63 may be connected between the compression device 10 and the air source 62, that is, the air source 62 may supply the hydrogen to the compression device 10 through the second cooling device 63, and the second cooling device 63 may reduce the temperature of the hydrogen flowing through the second cooling device when being started, so that the temperature of the hydrogen flowing into the compression device 10 may be reduced, the working efficiency of the compression device 10 may be improved, and the safety accident may be avoided.

And by the cooperation of the first cooling means 61 and the second cooling means 63, the temperature of the hydrogen gas flowing into the buffer container 30 can be effectively reduced, and this two-stage cooling method is advantageous in reducing the cooling power consumption.

As some alternative embodiments of the present application, the number of the energy recovery devices 60 may be one, the energy recovery devices 60 may be located downstream of the plurality of first valve bodies 50, or as shown in fig. 1, the number of the energy recovery devices 60 may be the same as the number of the first valve bodies 50, the plurality of energy recovery devices 60 may be disposed in one-to-one correspondence with the plurality of first valve bodies 50, and specifically, one energy recovery device 60 may be disposed downstream of each of the first valve bodies 50.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the utility model, a "first feature" or "second feature" may include one or more of such features.

In the description of the present utility model, "plurality" means two or more.

In the description of the utility model, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the utility model, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A gas supply system, comprising:

the compression device is suitable for compressing gas and conveying the compressed gas to the gas storage device;

The buffer container is positioned at the downstream of the gas storage device and is communicated with the gas dispenser, and the gas dispenser is suitable for supplying gas to the device to be supplemented;

the first valve body is connected between the gas storage device and the buffer container and is configured to be opened when the gas pressure in the buffer container is smaller than the required pressure of the gas dispenser;

And the energy recovery device is positioned at the downstream of the first valve body and is communicated between the first valve body and the buffer container.

2. The gas supply system of claim 1, wherein the energy recovery device is drivingly connected to the compression device.

3. The air supply system of claim 1, further comprising: the first cooling device is positioned at the downstream of the buffer container and communicated between the buffer container and the gas dispenser, and is used for reducing the temperature of gas flowing to the gas dispenser.

4. A gas supply system according to any one of claims 1 to 3, wherein the number of gas storage devices is plural, the compression device is a variable frequency compression device, the operating pressure of at least two of the plurality of gas storage devices is different, the plurality of gas storage devices are connected in parallel and are each in selective communication with the compression device, and the plurality of gas storage devices are each in selective communication with the buffer container.

5. The gas supply system as claimed in claim 4, wherein the plurality of gas storage devices includes at least a first gas storage device and a second gas storage device, the first gas storage device having an operating pressure of a first pressure value and the second gas storage device having an operating pressure of a second pressure value, the first pressure value being less than the second pressure value.

6. The gas supply system according to claim 5, wherein the number of the first valve bodies is plural, the first valve body is connected between each gas storage device and the buffer container, and when the gas pressure in the buffer container is smaller than the required pressure of the gas dispenser, the corresponding first valve body is controlled to be opened or closed according to the gas pressure in the buffer container and the working pressure of the gas storage device.

7. The gas supply system according to claim 6, wherein a gas pressure in the buffer container is smaller than the first pressure value, the first valve body corresponding to the first gas storage device is opened, and the first valve body corresponding to the second gas storage device is closed;

The gas pressure in the buffer container is larger than or equal to the first pressure value and smaller than the second pressure value, the first valve body corresponding to the first gas storage device is closed, and the first valve body corresponding to the second gas storage device is opened.

8. The air supply system of claim 5, further comprising: and the second valve bodies are connected between each gas storage device and each compression device, and the corresponding second valve bodies are controlled to be opened and closed according to the gas pressure output by the compression device and the working pressure of the gas storage device.

9. The gas supply system according to claim 8, wherein the gas pressure output from the compression device is greater than the first pressure value and equal to or less than the second pressure value, a second valve body corresponding to the first gas storage device is opened, and the first valve body corresponding to the second gas storage device is closed;

The gas pressure output by the compression device is larger than the second pressure value, the second valve body corresponding to the first gas storage device is closed, and the first valve body corresponding to the second gas storage device is opened.

10. A gas supply system according to any one of claims 1-3, further comprising: and a second cooling device upstream of the compression device for reducing the temperature of the gas flowing to the compression device.