Ammonia supply device for vehicle

Abstract

The utility model discloses a vehicle ammonia supply device which comprises a liquid ammonia storage tank, a liquid outlet and a gas outlet are arranged on the liquid ammonia storage tank, the liquid outlet is respectively connected with one end of a filling pipeline and one end of a liquid outlet pipeline, the liquid outlet pipeline is connected with a stop valve and an electromagnetic valve in series, the other end of the liquid outlet pipeline is connected with a first medium inlet of a water bath type vaporizer, and the other end of the water bath type vaporizer is connected with a second medium inlet of the water bath type vaporizer. A first medium outlet of the water bath type vaporizer is connected with an inlet of the buffer tank, an outlet of the buffer tank is used for providing ammonia gas, one end of the gas return pipeline is connected with the gas outlet, a pressure gauge, a stop valve and a safety valve are connected to the gas return pipeline in series, and a second medium inlet and a second medium outlet of the water bath type vaporizer are used for being connected with an engine cooling liquid outlet and an engine cooling liquid inlet respectively. And a saturation pressurization pipeline is further arranged, an electromagnetic valve and a heat exchange pipe located in the liquid ammonia storage tank are connected to the saturation pressurization pipeline in series, and two ports of the saturation pressurization pipeline are used for being connected with an engine cooling liquid inlet and an engine cooling liquid outlet respectively. The ammonia supply device for the vehicle can stably supply gas to the vehicle.

Description

Technical Field

[0001] The utility model relates to a vehicle air supply system, in particular to a vehicle ammonia supply device. Background Art

[0002] Liquid ammonia is a colorless liquid with a strong, pungent odor. As an important chemical raw material, ammonia is typically converted from gaseous form into liquid form by pressurization or cooling for ease of transportation and storage. Liquid ammonia is readily soluble in water, forming ammonium ions (NH4+) and hydroxide ions (OH-), resulting in an alkaline solution. China is currently increasing its investment in and support for environmental protection and new energy. As a zero-carbon emission new energy source, liquid ammonia holds broad prospects for automotive use. Currently, vehicle ammonia supply systems are in the early stages of technological development, with no mature, viable technical routes or solutions available. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a vehicle ammonia supply device which can stably supply gas to the vehicle.

[0004] In order to solve the above problems, the technical solution adopted by the present invention is as follows: a vehicle ammonia supply device, comprising: a liquid ammonia storage tank, a liquid outlet and a gas outlet are provided on the liquid ammonia storage tank, the liquid outlet is respectively connected to one end of the filling pipeline and one end of the liquid outlet pipeline, a filling port is provided on the other end of the filling pipeline, a stop valve and a solenoid valve are connected in series on the liquid outlet pipeline, the other end of the liquid outlet pipeline is connected to the medium inlet of the water bath vaporizer, the medium outlet of the water bath vaporizer is connected to the inlet of the buffer tank, and the outlet of the buffer tank is used to provide ammonia to the engine One end of the return air pipeline is connected to the air outlet, and the other end of the return air pipeline is provided with a return air port. A pressure gauge, a stop valve, and a safety valve are connected in series on the return air pipeline. The characteristics are as follows: the second medium inlet and outlet of the water bath vaporizer are respectively used to be connected to the engine coolant outlet and inlet, and a saturated boost pipeline is also provided. The saturated boost pipeline is connected in series with a solenoid valve and a heat exchange pipe located in the liquid ammonia storage tank. The two ends of the saturated boost pipeline are respectively used to be connected to the engine coolant inlet and outlet, and each solenoid valve and pressure gauge is electrically connected to the controller.

[0005] Furthermore, the aforementioned vehicle ammonia supply device, wherein: an auxiliary boost circuit is also provided, one end of the auxiliary boost circuit is connected to the liquid phase of the liquid ammonia storage tank, and the other end of the auxiliary boost circuit is connected to the gas phase of the liquid ammonia storage tank, the auxiliary boost circuit is connected in series with a shut-off valve, a solenoid valve, and a boost pump, the water bath vaporizer is connected in series to the auxiliary boost circuit through its three medium inlets and outlets, and the boost pump and the controller are electrically connected.

[0006] Furthermore, the aforementioned vehicle ammonia supply device, wherein: a gas phase return pipeline is also provided, one end of the gas phase return pipeline is connected to the gas phase of the liquid ammonia storage tank, a shut-off valve and a solenoid valve are connected in series on the gas phase return pipeline, and the other end of the gas phase return pipeline is used to be connected to the engine.

[0007] Furthermore, in the aforementioned vehicle ammonia supply device, a liquid outlet pump is connected in series to the liquid outlet pipeline, and the liquid outlet pump is electrically connected to the controller.

[0008] Furthermore, in the aforementioned vehicle ammonia supply device, an electric auxiliary heating device is provided in the buffer tank.

[0009] Furthermore, in the aforementioned vehicle ammonia supply device, a socket seat is provided on the top of the head of the liquid ammonia storage tank, and the liquid level sensor is inserted into the liquid ammonia storage tank obliquely downward through the socket on the socket seat.

[0010] Furthermore, in the aforementioned vehicle ammonia supply device, the liquid level sensor is threadedly connected to the socket.

[0011] The advantages of the present invention are as follows: the vehicle ammonia supply device is suitable for supplying ammonia to automobiles, can utilize the coolant in the automobile engine through the saturated boost pipeline, and by controlling the flow rate of the coolant that exchanges heat with the liquid ammonia in the heat exchange tube, the pressure in the liquid ammonia storage tank can be accurately controlled, and the pressure in the tank can be saturated and maintained, thereby achieving stable gas supply, and solving the problem that liquid ammonia is difficult to gasify and pressurize; in order to cope with the situation where the saturated boost pipeline has a slow pressurization speed when full of liquid or the pressure in other tanks cannot be maintained, an independent auxiliary boost circuit is added to the gas supply system; in order to address the problem that the engine coolant temperature is low and pressure cannot be built up in the tank during cold start, the vehicle ammonia supply device adds a liquid outlet pump to provide the amount of liquid ammonia required for engine idling at low pressure, so that the engine can warm up and thereby increase the coolant temperature; the plug-in liquid level gauge has the following advantages: it avoids the problem that the built-in liquid level gauge is easily damaged during tank heat treatment, and also avoids the problem that the external liquid level gauge is cumbersome to install and has insufficient accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of a preferred embodiment of the vehicle ammonia supply device of the present utility model. DETAILED DESCRIPTION

[0013] The present invention will be described in further detail below with reference to specific embodiments and accompanying drawings.

[0014] like Figure 1As shown, the vehicle ammonia supply device includes: a liquid ammonia storage tank 1, a liquid outlet and a gas outlet are provided on the liquid ammonia storage tank 1, the liquid outlet is connected to one end of the filling pipeline 2 and one end of the liquid outlet pipeline 3 respectively, the other end of the filling pipeline 2 is provided with a filling port, and a check valve 13 is connected in series on the filling pipeline 2. The check valve 13 has a one-way passing function. Liquid can enter the tank body through the check valve, and the liquid in the tank body cannot flow out through the check valve. The filling port can be quickly connected to an external liquid adding device, so that the liquid ammonia storage tank can be Tank 1 is quickly filled, and a stop valve 11 and a solenoid valve 12 are connected in series on the liquid outlet pipe 3. The other end of the liquid outlet pipe 3 is connected to the medium inlet of the water bath vaporizer 4, and the medium outlet of the water bath vaporizer 4 is connected to the inlet of the buffer tank 17. The outlet of the buffer tank 17 is used to provide ammonia to the engine. The medium inlet and outlet of the water bath vaporizer 4 are respectively used to be connected to the engine coolant outlet and inlet. One end of the return air pipe 5 is connected to the outlet, and the other end of the return air pipe 5 is provided with a There is a return air port, and a pressure gauge 19, a stop valve 11, and a safety valve 18 are connected in series on the return air pipeline 5. During filling, if the gas pressure in the tank is too high, the gas can be discharged through the return air port to reduce the pressure. The gas pressure in the tank is detected by the pressure gauge 19 and transmitted to the controller. The safety valve 18 plays a role in safe pressure relief. One end of the gas phase return pipeline 6 is connected to the gas phase of the liquid ammonia storage tank 1. In this embodiment, one end of the gas phase return pipeline 6 is connected to the gas phase of the liquid ammonia storage tank 1 by being connected to the return air pipeline 5. The gas phase return pipeline 6 is connected in series with a stop valve 11 and a safety valve 18. A shutoff valve 11 and a solenoid valve 12 are connected. The other end of the gas-phase return line 6 is connected to the engine. Through this line, ammonia gas in the gas phase of the liquid ammonia storage tank 1 can be directly drawn out for use by the engine. A saturated boost line 8 is also provided. The solenoid valve 12 and a heat exchange pipe 14 located in the liquid ammonia storage tank 1 are connected in series to the saturated boost line 8. The two ends of the saturated boost line 8 are respectively connected to the engine coolant inlet and outlet. Each solenoid valve 12 and pressure gauge 19 are electrically connected to the controller. Based on the required tank pressure, the saturated boost line 8 can directly introduce engine coolant into the tank body for direct heat exchange with liquid ammonia, vaporizing some of the liquid ammonia and thereby increasing the tank pressure to meet the engine's gas supply requirements.

[0015] During operation, the controller opens the valve on the liquid outlet line 3, allowing the liquid ammonia in the liquid ammonia storage tank 1 to flow into the water bath vaporizer 4 under the influence of the internal air pressure, where it undergoes heat exchange with the engine coolant and vaporizes. The vaporized ammonia gas then enters the buffer tank 17, where it is then used by the vehicle engine. The vehicle engine coolant system uses coolant to cool the engine, continuously producing high-temperature coolant after the vehicle is started.

[0016] In this embodiment, an auxiliary boosting circuit 7 is also provided, one end of the auxiliary boosting circuit 7 is inserted into the liquid phase of the liquid ammonia storage tank 1, and the other end of the auxiliary boosting circuit 7 is connected to the gas phase of the liquid ammonia storage tank 1. In this embodiment, the auxiliary boosting circuit 7 is connected to the gas phase of the liquid ammonia storage tank 1 by being connected to the gas phase return pipeline 6. In addition, the auxiliary boosting circuit 7 can also be connected to the gas outlet of the liquid ammonia storage tank 1 to connect to the gas phase of the liquid ammonia storage tank 1, and can also be connected to the return gas pipeline 5 to connect to the gas phase of the liquid ammonia storage tank 1; the auxiliary boosting circuit 7 is serially connected with a shut-off valve 11, a solenoid valve 12, and a boosting pump 16, and the water bath vaporizer 4 is serially connected to the auxiliary boosting circuit 7 through the three medium inlets and outlets thereon, and the boosting pump 16 is electrically connected to the controller. To address situations where saturated boost pipeline 8 experiences slow boosting when full of liquid, or where other internal tank pressure cannot be maintained, the air supply system incorporates an independent auxiliary boost circuit 7. This circuit, operated by boost pump 16, draws the liquid phase from the tank, vaporizes it in a water-bath vaporizer 4, and returns it to the tank's gas phase, thereby providing auxiliary boosting. When auxiliary boosting is required, a controller opens the solenoid valve in the pipeline and adjusts the speed of boost pump 16 to ensure boosting efficiency and prevent the gas-liquid two-phase medium from entering the boost pump 16.

[0017] A liquid discharge pump 15 is connected in series to the liquid discharge line 3 and is electrically connected to the controller. To address situations where the tank pressure cannot be maintained, the air supply system adds a low-power liquid discharge pump 15 to the liquid discharge line 3 as an auxiliary. The liquid discharge pump 15 is controlled by the controller and starts to control and regulate the flow rate when the low tank pressure cannot meet the engine's requirements.

[0018] In order to prevent the ammonia gas in the buffer tank 17 from cooling and reliquefying, an electric auxiliary heating device is provided in the buffer tank 17 .

[0019] A socket 9 is located at the top of the end cap of the liquid ammonia storage tank 1. A liquid level sensor 10 is inserted diagonally downward into the tank 1 through a socket on the socket 9. The liquid level sensor 10 is threaded onto the socket 9, creating a seal. This plug-in type of liquid level sensor 10 offers the following advantages: it avoids the vulnerability of internal level sensors to damage during tank heat treatment, and also avoids the cumbersome installation and lack of accuracy of external level sensors.

Claims

1. Vehicle ammonia supply device, including: A liquid ammonia storage tank is provided with a liquid outlet and an air outlet on the liquid ammonia storage tank. The liquid outlet is respectively connected to one end of a filling pipeline and one end of a liquid outlet pipeline. A filling port is provided on the other end of the filling pipeline. A shut-off valve and a solenoid valve are connected in series on the liquid outlet pipeline. The other end of the liquid outlet pipeline is connected to a medium inlet 1 of a water bath vaporizer. A medium outlet 1 of the water bath vaporizer is connected to the inlet of a buffer tank. The outlet of the buffer tank is used to provide ammonia to the engine. One end of a return air pipeline is connected to the air outlet. A return air port is provided on the other end of the return air pipeline. A pressure gauge, a shut-off valve and a safety valve are connected in series on the return air pipeline. The characteristic is that the medium inlet and outlet 2 of the water bath vaporizer are respectively used to be connected to the engine coolant outlet and inlet. A saturated boost pipeline is also provided. A solenoid valve and a heat exchange pipe located in the liquid ammonia storage tank are connected in series on the saturated boost pipeline. The two ends of the saturated boost pipeline are respectively used to be connected to the engine coolant inlet and outlet. Each solenoid valve and pressure gauge is electrically connected to the controller.

2. The vehicle ammonia supply device according to claim 1, characterized in that: An auxiliary boosting circuit is also provided, one end of which is connected to the liquid phase of the liquid ammonia storage tank, and the other end of which is connected to the gas phase of the liquid ammonia storage tank. A shut-off valve, a solenoid valve, and a boosting pump are connected in series to the auxiliary boosting circuit. The water bath vaporizer is connected in series to the auxiliary boosting circuit through its three medium inlets and outlets, and the boosting pump and the controller are electrically connected.

3. The vehicle ammonia supply device according to claim 1, characterized in that: A gas phase recycling pipeline is also provided, one end of which is connected to the gas phase of the liquid ammonia storage tank, a shut-off valve and a solenoid valve are connected in series on the gas phase recycling pipeline, and the other end of the gas phase recycling pipeline is used to be connected to the engine.

4. The vehicle ammonia supply device according to claim 1, 2 or 3, characterized in that: A liquid outlet pump is connected in series on the liquid outlet pipeline, and the liquid outlet pump is electrically connected to the controller.

5. The vehicle ammonia supply device according to claim 1, 2 or 3, characterized in that: An electric auxiliary heating device is provided in the buffer tank.

6. The vehicle ammonia supply device according to claim 1, 2 or 3, characterized in that: A socket seat is provided on the top of the head of the liquid ammonia storage tank, and the liquid level sensor is inserted into the liquid ammonia storage tank obliquely downward through the socket on the socket seat.

7. The vehicle ammonia supply device according to claim 6, characterized in that: The liquid level sensor is threadedly connected to the socket seat.

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