Single ejector with heating function

Abstract

The utility model relates to the technical field of ejectors, in particular to a single ejector with a heating function. Comprising a valve body assembly and an ejector assembly which are connected through a bolt, the valve body assembly comprises a valve seat, a switch valve and a proportional valve are arranged on the valve seat, the ejector assembly comprises an ejector shell, a low-pressure suction area and a high-pressure area are arranged in the ejector shell, the low-pressure suction area is communicated with a hydrogen return opening, a nozzle is arranged in the low-pressure suction area, and the high-pressure area is communicated with the low-pressure suction area. The nozzle is installed on the valve seat, an electric heating ring and an electric heating piece are installed at the position, close to the nozzle, in the valve seat, the electric heating ring and the electric heating piece are used for heating the nozzle, the valve seat and the ejector shell to break ice, a temperature sensor is further installed in the valve seat, and a wire of the temperature sensor extends to the outer side of the valve seat. And ice breaking is carried out on the interiors of the nozzle and the hydrogen return port, so that ice in the nozzle and the hydrogen return port is melted, normal work of the ejector is guaranteed, smooth circulation of a hydrogen path of the fuel cell is kept, the situation of shutdown maintenance is avoided, and the working stability of a fuel cell system is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to ejector technical field especially relates to a single ejector with heating. BACKGROUND

[0002] At present, the ejector has been widely used in fuel cell hydrogen road system, the existing ejector, when working, due to the hydrogen-containing mixed gas discharged by fuel cell can take some water vapor, after using for a period of time, a certain amount of water will be accumulated around the nozzle and inside the hydrogen return port, if these water is not discharged in time, when the temperature is too low in winter, water will freeze into ice, completely freeze, thereby leading to the insufficient performance of the ejector, causing the poor circulation of fuel cell hydrogen road, and even causing the situation of shutdown maintenance, influence the normal work of fuel cell system.

[0003] In conclusion, the ice breaking problem around the nozzle of the ejector and at the hydrogen return port has become a technical problem that needs to be solved in the industry. UTILITY MODEL CONTENTS

[0004] The utility model discloses in order to make up for the insufficient of prior art, provide a single ejector with heating, solve the water around the nozzle and at the hydrogen return port of the ejector of previous time when low temperature can freeze and lead to the insufficient performance of the ejector Problem.

[0005] The utility model discloses a technical scheme adopted to solve the above technical problems:

[0006] A single ejector with heating, including the valve body assembly and the ejector assembly connected through bolt, the valve body assembly includes valve seat, is equipped with on valve seat and is opened switch valve and proportional valve, the ejector assembly includes the ejector shell, is equipped with low pressure suction area and high pressure area in the inside of ejector shell, low pressure suction area is linked together with hydrogen return port, is equipped with nozzle in low pressure suction area, nozzle is installed on valve seat, the position of valve seat near nozzle is installed with electric heating ring and electric heating sheet, electric heating ring and electric heating sheet are used for heating nozzle, valve seat and the ice breaking of ejector shell, still be installed with temperature sensor in valve seat, and the lead of temperature sensor stretches to the outside of valve seat.

[0007] The position of valve seat near nozzle is equipped with annular groove, and the electric heating ring is installed in the annular groove.

[0008] The gap between the electric heating ring and the annular groove is filled with heat-conducting sealant.

[0009] The lead of the electric heating ring stretches to the outside of the valve seat, and the outside of the annular groove is filled with fixed sealant to fix the lead.

[0010] The electric heating ring comprises a ceramic electric heating ring.

[0011] The utility model adopts the above scheme, and has the following advantages:

[0012] By installing the electric heating ring and the electric heating sheet in the valve seat near the nozzle position, when the temperature is too low in winter, the electric heating ring and the electric heating sheet generate heat after being powered on, first, the valve seat is heated, the heat of the valve seat can be transmitted to the nozzle and the ejector shell, thereby the ice inside the nozzle and the hydrogen return port is melted, the normal work of the ejector is ensured, the hydrogen circulation of the fuel cell is kept unobstructed, the situation of shutdown maintenance is avoided, and the stability of the fuel cell system is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a sectional view structure schematic diagram of the utility model.

[0014] In the figure, 1, valve seat, 2, on-off valve, 3, proportional valve, 4, ejector shell, 5, low-pressure suction area, 6, high-pressure area, 7, hydrogen return port, 8, nozzle, 9, electric heating ring, 10, electric heating sheet, 11, temperature sensor, 12, heat-conducting potting glue, 13, fixed potting glue. DETAILED DESCRIPTION

[0015] In order to clearly illustrate the technical features of the present scheme, the utility model will be described in detail below through specific implementation modes, and combined with its drawings.

[0016] As shown in Figure 1 A single ejector with heating includes a valve body assembly and an ejector assembly connected by bolts, the valve body assembly includes a valve seat 1, the valve seat 1 is provided with an on-off valve 2 and a proportional valve 3, the ejector assembly includes an ejector shell 4, the inside of the ejector shell 4 is provided with a low-pressure suction area 5 and a high-pressure area 6, the low-pressure suction area 5 is communicated with a hydrogen return port 7, the low-pressure suction area 5 is provided with a nozzle 8, the nozzle 8 is installed on the valve seat 1, the valve seat 1 is provided with an electric heating ring 9 and an electric heating sheet 10 near the nozzle 8, the electric heating ring 9 and the electric heating sheet 10 are used for heating the nozzle 8, the valve seat 1 and the ejector shell 4 to break ice, the valve seat 1 is also provided with a temperature sensor 11, the lead wire of the temperature sensor 11 extends to the outside of the valve seat 1 and is connected with a controller, and the heating can be disconnected after reaching the set temperature.

[0017] The valve seat 1 is provided with an annular groove near the nozzle 8, and the electric heating ring 9 is installed in the annular groove.

[0018] The gap between the electric heating ring 9 and the annular groove is filled with heat-conducting potting glue 12, which can not only fix the electric heating ring 9, but also play a heat-conducting role.

[0019] The lead wire of the electric heating ring 9 extends to the outside of the valve seat 1 and is used for power supply or power-off of the electric heating ring 9, and the outside of the annular groove is filled with fixed potting glue 13 for fixing the lead wire.

[0020] The electric heating ring 9 comprises a ceramic electric heating ring, which has high thermal efficiency and can quickly melt the ice in the channel.

[0021] Working principle:

[0022] The switch valve 2 is connected with the hydrogen source pipeline, the hydrogen return port 7 is connected with the output pipeline of the fuel cell hydrogen circulation, the high-pressure hydrogen gas of the hydrogen source is sprayed from the nozzle 8 after the switch valve 2 and the proportional valve 3, the hydrogen-containing mixed gas in the hydrogen return port 7 is sucked into the low-pressure suction area 5, and the hydrogen gas of the hydrogen source and the hydrogen-containing mixed gas are outputted backward in the high-pressure area 6. When the temperature sensor 11 detects that the temperature of the valve seat 1 is too low, the temperature sensor 11 sends a signal to the controller, and the controller supplies power to the electric heating ring 9 and the electric heating sheet 10, so that the temperature of the electric heating ring 9 and the electric heating sheet 10 is quickly raised, the valve seat 1 is heated first, and the heat of the valve seat 1 can be transmitted to the nozzle 8 and the ejector shell 4, so that the ice in the nozzle 8 and the hydrogen return port 7 is melted, the ice in the nozzle 8 and the hydrogen return port 7 is melted, the normal work of the ejector is ensured, the hydrogen circulation of the fuel cell is kept unobstructed, the situation that the fuel cell is stopped for maintenance is avoided, the stability of the fuel cell system is ensured, and the electric heating ring 9 and the electric heating sheet 10 are powered off after the ice is broken.

[0023] The above specific embodiment cannot be regarded as the limitation of the protection scope of the utility model, and any alternative improvement or change made by the person skilled in the art to the embodiment of the utility model falls within the protection scope of the utility model.

[0024] The not detailed part of the utility model is the known technology of the person skilled in the art.

Claims

1. A single-impeller with heating, characterized by: The valve body assembly and the ejector assembly are connected by bolts, the valve body assembly comprises a valve seat, a switch valve and a proportional valve are arranged on the valve seat, the ejector assembly comprises an ejector shell, a low-pressure suction area and a high-pressure area are arranged in the interior of the ejector shell, the low-pressure suction area is communicated with a hydrogen return port, a nozzle is arranged in the low-pressure suction area, the nozzle is installed on the valve seat, an electric heating ring and an electric heating sheet are installed on the valve seat near the nozzle, the electric heating ring and the electric heating sheet are used for heating the nozzle, the valve seat and the ejector shell to break ice, a temperature sensor is also installed in the valve seat, and the lead wire of the temperature sensor extends to the outside of the valve seat.

2. A single-impeller with heating according to claim 1, characterized in that: An annular groove is arranged on the valve seat near the nozzle, and the electric heating ring is installed in the annular groove.

3. A single-impeller with heating according to claim 2, characterized in that: The gap between the electric heating ring and the annular groove is filled with heat-conducting sealing glue.

4. A single-impeller with heating according to claim 2, characterized in that: The lead wire of the electric heating ring extends to the outside of the valve seat, and the outside of the annular groove is filled with fixed sealing glue to fix the lead wire.

5. A single-impeller with heating according to claim 1 or 2, characterized in that: The electric heating ring comprises a ceramic electric heating ring.

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