LNG vaporizer and LNG vehicle

Abstract

The invention provides an LNG vaporizer and an LNG vehicle. The LNG vaporizer comprises a box body, a heat exchange module and a circulating water pipeline. A vaporization cavity is formed in the box body, and the heat exchange module communicates with the LNG pipeline and is located in the vaporization cavity. And the circulating water pipeline comprises a water inlet pipeline, a water outlet pipeline and a shunting branch. The water inlet pipeline communicates with the vaporization cavity of the box body so as to provide a heat exchange medium for the vaporization cavity, and the water outlet pipeline communicates with the vaporization cavity so as to guide the heat exchange medium completing heat exchange out of the vaporization cavity. One end of the shunting branch is communicated with the water inlet pipeline, the joint is located at the upstream of the vaporization cavity, the other end of the shunting branch is communicated with the water outlet pipeline, and the joint is located at the downstream of the vaporization cavity. The flow dividing branch communicates with a control valve so as to control connection or disconnection of the flow dividing branch, so that the heat exchange medium in the water inlet pipeline can directly flow into the water outlet pipeline through the flow dividing branch so as to control the flow of the heat exchange medium flowing into the vaporization cavity, heat transferred to the heat exchange module and the LNG by the heat exchange medium is controlled, and the temperature of the LNG after vaporization is controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of LNG vehicles, and in particular to an LNG vaporizer and an LNG vehicle. Background Art

[0002] As a clean energy source, natural gas is widely used in the field of automotive fuel. Liquid storage has the advantages of high reserves and high safety, and has gradually replaced the storage in high-pressure cylinders.

[0003] Currently, the LNG cryogenic vehicle bottles on the market use a water bath vaporizer, which uses the engine's circulating water to exchange heat and vaporize the LNG gas supply pipeline.

[0004] However, the uncontrollable temperature of the engine's circulating water also affects the temperature of the LNG flowing through the carburetor, which can easily damage the engine. For example, in winter, when the vehicle is first started, the engine's circulating water temperature is low, making it very easy for the supply air temperature to drop too low, leading to carburetor icing and cylinder cracking. In summer, after prolonged operation, the engine's circulating water temperature remains high, making it very easy for the supply air temperature to rise too high, leading to torque limitations and other problems. In serious cases, this can affect the vehicle's normal and safe operation. Summary of the Invention

[0005] An object of the present invention is to provide an LNG vaporizer capable of controlling the temperature of LNG.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: According to one aspect of the present invention, there is provided an LNG vaporizer connected to an LNG pipeline, the LNG vaporizer comprising: a housing having a vaporization chamber provided therein; a heat exchange module connected to the LNG pipeline so that LNG flows through the heat exchange module; the heat exchange module being accommodated in the vaporization chamber; a circulating water pipeline comprising a water inlet pipeline, a water outlet pipeline, and a diversion branch, the water inlet pipeline being connected to the vaporization chamber to provide a heat exchange medium to the vaporization chamber so that the heat exchange medium infiltrates the heat exchange module and transfers heat to the heat exchange module; the water outlet pipeline being connected to the vaporization chamber to guide the heat exchange medium out of the vaporization chamber; one end of the diversion branch being connected to the water inlet pipeline and located upstream of the vaporization chamber, and the other end of the diversion branch being connected to the water outlet pipeline and located downstream of the vaporization chamber; wherein the diversion branch is connected to a control valve; the control valve is used to control the conduction or shutoff of the diversion branch to control the flow rate of the heat exchange medium flowing into the vaporization chamber.

[0007] In one embodiment of the present application, the LNG vaporizer further includes a temperature detection device and a control module; the temperature detection device is connected to the LNG pipeline and is located downstream of the vaporization chamber, so as to detect the temperature of the LNG flowing out of the vaporization chamber and form a temperature signal; the control module is electrically connected to the temperature detection device and the control valve, and turns the control valve on or off according to the temperature signal; wherein, when the temperature signal is higher than a preset value, the control module controls the control valve to be turned on, so that part of the heat exchange medium in the water inlet pipeline can flow to the water outlet pipeline through the diversion branch; when the temperature signal is lower than the preset value, the control module controls the control valve to be turned off.

[0008] In one embodiment of the present application, the LNG vaporizer further includes a heating component; the heating component is connected to the water inlet pipeline to heat the heat exchange medium.

[0009] In one embodiment of the present application, the LNG vaporizer further includes a heating component; the heating component is disposed in the vaporization chamber to heat the heat exchange medium.

[0010] In one embodiment of the present application, the heating component is electrically connected to the control module so that the control module can control the opening or closing of the heating component through the temperature signal; wherein, when the temperature signal is lower than a preset value, the control module controls the heating component to open and heat the heat exchange medium; when the temperature signal is higher than a preset value, the control module controls the heating component to close.

[0011] In one embodiment of the present application, the heat exchange module is configured as a metal coil, a metal fin tube or a metal wound tube.

[0012] In one embodiment of the present application, the control valve is configured as a solenoid valve.

[0013] In one embodiment of the present application, the control valve is configured as a regulating valve.

[0014] In one embodiment of the present application, a drain port is provided at the bottom of the box body, and the drain port is connected to the vaporization chamber to discharge the medium in the vaporization chamber.

[0015] In one embodiment of the present application, the LNG vaporizer further includes a threaded plugging cover; the threaded plugging cover is detachably connected to the drain outlet to seal the drain outlet.

[0016] The present application also provides an LNG vehicle, which includes a vehicle body, a liquid storage tank, an LNG pipeline, a heat dissipation water tank and any one of the LNG vaporizers described above, wherein the liquid storage tank, the LNG pipeline, the heat dissipation water tank and the LNG vaporizer are installed on the vehicle body, the LNG pipeline is connected to the liquid storage tank for transporting LNG, the LNG vaporizer is connected to the LNG pipeline to heat the LNG flowing through the LNG pipeline, the heat dissipation water tank is used to store a heat exchange medium, and the heat dissipation water tank is connected to the engine of the LNG vehicle so that the heat exchange medium dissipates heat to the engine, and the LNG vaporizer is connected to the heat dissipation water tank so that the heat exchange medium flows into the LNG vaporizer and releases heat to the LNG vaporizer.

[0017] It can be seen from the above technical solutions that the present invention has at least the following advantages and positive effects: In the present invention, the LNG vaporizer includes a housing, a heat exchange module, and a circulating water pipeline. A vaporization chamber is provided within the housing, and the heat exchange module is connected to the LNG pipeline, allowing LNG to flow through the heat exchange module. The heat exchange module is also located within the vaporization chamber. The circulating water pipeline includes an inlet pipeline, an outlet pipeline, and a diversion branch. The inlet pipeline connects to the vaporization chamber of the housing to provide a heat exchange medium to the vaporization chamber, allowing the heat exchange medium to infiltrate the heat exchange module and transfer heat to the heat exchange module, vaporizing the LNG flowing through the heat exchange module. The outlet pipeline connects to the vaporization chamber to guide the heat exchanged heat medium out of the vaporization chamber. One end of the diversion branch connects to the water inlet pipeline, and the connection is located upstream of the vaporization chamber. The other end of the diversion branch connects to the water outlet pipeline, and the connection is located downstream of the vaporization chamber. At the same time, the diversion branch is connected to a control valve to control the conduction or shutoff of the diversion branch, so that the heat exchange medium in the water inlet pipe can flow directly into the water outlet pipe through the diversion branch to control the flow rate of the heat exchange medium into the vaporization chamber, thereby controlling the heat transferred by the heat exchange medium to the heat exchange module and LNG, and further controlling the temperature of the LNG after vaporization. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of an LNG vaporizer according to an embodiment of the present invention.

[0019] Figure 2 yes Figure 1 Another schematic diagram of the LNG vaporizer.

[0020] The following are the descriptions of the reference numerals: 10-Box; 11-Vaporization chamber; 12-Drain port; 13-Threaded plug; 20-LNG pipeline; 21-Heat exchange module; 30-Circulating water pipeline; 31-Water inlet pipeline; 32-Water outlet pipeline; 33-Diversion branch; 41-Temperature detection device; 42-Control module; 50-Heating component; 331-Control valve. DETAILED DESCRIPTION

[0021] Typical embodiments embodying the features and advantages of the present invention are described in detail in the following description. It should be understood that the present invention is capable of various variations in different embodiments without departing from the scope of the present invention, and that the descriptions and illustrations herein are intended to be illustrative in nature and not to limit the present invention.

[0022] In describing the present invention, it should be understood that in the embodiments shown in the accompanying drawings, directional or positional indications (such as up, down, left, right, front, and back) are provided solely for the purpose of facilitating the description of the present invention and simplifying the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. These descriptions are appropriate when these components are in the positions shown in the accompanying drawings. If the descriptions of the positions of these components are changed, these directional indications will also change accordingly.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, features defined as "first" or "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0024] Currently, all LNG low-temperature automotive cylinders on the market use water-bath vaporizers, which use engine circulating water to exchange heat and vaporize the LNG gas supply pipeline. However, since the temperature of the engine circulating water is uncontrollable, it can easily damage the engine. For example, in the low temperature environment of winter, the temperature of the engine circulating water is low when the vehicle is just started, and it is very easy for the supply temperature to be too low, resulting in carburetor freezing and cylinder cracking. In summer, after the vehicle has been running for a long time, the temperature of the engine circulating water will remain at a higher temperature, and it is very easy for the supply temperature to be too high, resulting in vehicle torque limitation and other faults. In serious cases, it will affect the normal and safe use of the vehicle. Therefore, an LNG vaporizer is proposed to solve the above problems.

[0025] The scheme is further illustrated by the following examples: Figure 1 Schematic diagram of an LNG vaporizer according to an embodiment of the present invention. Figure 2 yes Figure 1 Another schematic diagram of the LNG vaporizer.

[0026] The LNG vehicle of this embodiment may include a vehicle body, a liquid storage tank, an LNG pipeline, a radiator, and an LNG vaporizer. The liquid storage tank, LNG pipeline, radiator, and LNG vaporizer are mounted on the vehicle body. The liquid storage tank is used to store LNG, and the LNG pipeline is connected to the liquid storage tank for transporting LNG. The LNG vaporizer is connected to the LNG pipeline to heat the LNG flowing through the LNG pipeline, maintaining the LNG at a suitable temperature. The radiator is used to store a heat exchange medium, and the radiator is connected to the engine of the LNG vehicle so that the heat exchange medium dissipates heat from the engine and heats the heat exchange medium using the heat generated by the engine. Specifically, the heat exchange medium can be provided as circulating water from the engine. The LNG vaporizer is connected to the radiator, allowing the heat exchange medium to flow into the LNG vaporizer and release heat to the LNG vaporizer. This allows the LNG vaporizer to use the heat generated by the engine to heat the LNG, ensuring that the LNG is output at a suitable temperature.

[0027] It should be noted that since the heat of the heat exchange medium comes from the engine, and the heat exchange medium heats the LNG in the LNG pipeline in the LNG vaporizer, the waste heat generated by the engine is utilized, thereby improving the energy utilization efficiency of the LNG vehicle and reducing the operating cost of the LNG vehicle.

[0028] See also Figure 1 The LNG vaporizer of this embodiment is connected to the LNG pipeline 20 and is used to vaporize liquid LNG so that the LNG can be output at a suitable temperature to ensure the safety of gas-using equipment.

[0029] In this embodiment, the LNG vaporizer is installed on a vehicle and connected to the vehicle's engine circulating water. This allows the LNG vaporizer to use the circulating water to heat and vaporize the LNG, ensuring that the LNG temperature remains within an appropriate range. Specifically, after exchanging heat with the engine, the circulating water removes the heat generated by the engine and flows into the LNG vaporizer, where the heat carried by the circulating water heats and vaporizes the LNG.

[0030] Specifically, the LNG vaporizer may include a tank 10 , a heat exchange module 21 and a circulating water pipeline 30 .

[0031] The housing 10 is provided with a vaporization chamber 11, and a heat exchange module 21 is housed within the chamber. The heat exchange module 21 is connected to the LNG pipeline 20, allowing LNG to flow through the heat exchange module 21. A circulating water pipeline 30 connects the engine's cooling water tank or radiator and the housing 10, allowing the engine's circulating water (i.e., heat exchange medium) to circulate along the circulating water pipeline 30 between the engine and the housing 10.

[0032] It should be noted that a drain port 12 is provided at the bottom of the housing 10, which communicates with the vaporization chamber 11, allowing the medium in the vaporization chamber 11 to be discharged along the drain port 12, thereby facilitating the replacement of the heat exchange medium in the vaporization chamber 11. The medium in the vaporization chamber 11 may include heat exchange medium or impurities remaining in the vaporization chamber 11. In other words, the heat exchange medium or impurities in the vaporization chamber 11 can be discharged from the vaporization chamber 11 through the drain port 12, thereby ensuring the heat exchange efficiency of the vaporization chamber 11.

[0033] Meanwhile, the LNG vaporizer may further include a threaded plugging cover 13 , wherein the threaded plugging cover 13 is detachably connected to the drain outlet 12 , so that the threaded plugging cover 13 can block the drain outlet 12 .

[0034] In this embodiment, the heat exchange medium can be set to liquid water with antifreeze added, so as to ensure that the heat exchange medium can withstand low temperatures of around -40°C and avoid condensation and freezing of the heat exchange medium in the vaporization chamber 11.

[0035] In addition, the heat exchange module 21 can be configured as a metal coil, metal fin tube or metal wound tube, so that the LNG flowing through the heat exchange module 21 can exchange heat with the heat exchange medium located in the vaporization chamber 11, thereby raising the temperature of the LNG to an appropriate temperature.

[0036] The metal coil can be configured as a spiral coil, a U-shaped coil, or a straight coil. When LNG flows through the metal coil, it exchanges heat with the heat exchange medium within vaporization chamber 11, thereby increasing the temperature of the LNG. Specifically, the metal coil can be configured as a stainless steel coil, a copper-nickel alloy coil, an aluminum alloy coil, or the like, ensuring the coil's thermal conductivity and improving the direct heat exchange efficiency between the heat exchange medium and the LNG.

[0037] At the same time, the metal fin tubes can be configured as star-shaped fins, and the metal coiled tubes can be configured as coiled tubes. Specifically, the metal fin tubes or the metal coiled tubes can be configured as stainless steel tubes, copper-nickel alloy tubes, aluminum alloy tubes, etc., and the fins or coiled tubes can be configured as aluminum sheets or steel sheets, etc., to increase the heat exchange area. When LNG flows through the metal fin tubes or the metal coiled tubes, the LNG can exchange heat with the heat exchange medium located in the vaporization chamber 11 through the metal fin tubes or the metal coiled tubes.

[0038] See Figure 1 The circulating water pipeline 30 may be provided with a water inlet pipeline 31 , a water outlet pipeline 32 and a diversion branch 33 .

[0039] One end of the water inlet pipe 31 is connected to the engine's radiator or cooling water tank, and the other end is connected to the vaporization chamber 11 in the housing 10, allowing the heat exchange medium to flow from the engine into the vaporization chamber 11 through the water inlet pipe 31. After the heat exchange medium flows into the vaporization chamber 11, it can soak or submerge the heat exchange module 21, allowing the heat exchange medium to transfer heat to the heat exchange module 21.

[0040] At the same time, one end of the water outlet pipe 32 is connected to the vaporization chamber 11 within the housing 10, and the other end is connected to the engine's radiator or cooling water tank. This allows the heat exchange medium, after completing the heat exchange, to flow from the vaporization chamber 11 to the engine's radiator or cooling water tank. Therefore, the heat exchange medium can flow between the engine's radiator and vaporization chamber 11 via the circulating water pipe 30, allowing the heat generated by the engine to be transferred to the heat exchange module 21 through the heat exchange medium. The heat exchange module 21 then heats the LNG, allowing it to be transported outward at a suitable temperature.

[0041] It should be noted that, in the flow direction of LNG, the connection between the water inlet pipe 31 and the tank body 10 is located upstream of the connection between the water outlet pipe 32 and the tank body 10, so that the higher temperature heat exchange medium flowing out of the engine enters the vaporization chamber 11 and flows along the flow direction of LNG in the vaporization chamber 11, thereby improving the heat exchange effect of the heat exchange medium on the heat exchange module 21 and LNG.

[0042] In addition, one end of the diversion branch 33 is connected to the water inlet pipe 31 and is located upstream of the vaporization chamber 11. At the same time, the other end of the diversion branch 33 is connected to the water outlet pipe 32 and is located downstream of the vaporization chamber 11, so that part of the heat exchange medium in the water inlet pipe 31 can flow along the diversion branch 33 to the water outlet pipe 32 and flow back to the engine radiator along the water outlet pipe 32.

[0043] In this embodiment, the branch flow path 33 is connected to a control valve 331 . The control valve 331 is used to control the opening or closing of the branch flow path 33 to control the flow rate of the heat exchange medium flowing into the vaporization chamber 11 .

[0044] Specifically, when control valve 331 is closed, diverter branch 33 is also closed, and the heat exchange medium in the engine radiator flows from the water inlet pipe 31 to the vaporization chamber 11, and then flows back to the radiator from the vaporization chamber 11 through the water outlet pipe 32. When control valve 331 is open, diverter branch 33 is also open, and some of the heat exchange medium in the water inlet pipe 31 flows along diverter branch 33 to the water outlet pipe 32 and back to the engine radiator, thereby reducing the amount of heat exchange medium flowing into the vaporization chamber 11, thereby reducing the total heat exchanged in the vaporization chamber 11 and preventing the LNG output temperature from being too high.

[0045] It should be noted that the control valve 331 can be set as a solenoid valve or a regulating valve, so that the control valve 331 can control the on-off of the shunt branch 33 .

[0046] See Figure 1 The LNG vaporizer may further include a temperature detection device 41 and a control module 42 .

[0047] Temperature sensing device 41 is connected to LNG pipeline 20 and located downstream of vaporization chamber 11, that is, at the outlet of vaporization chamber 11. This allows temperature sensing device 41 to detect the temperature of LNG exiting vaporization chamber 11 and generate a temperature signal. Control module 42 is electrically connected to temperature sensing device 41 and control valve 331. Based on the temperature signal, control valve 331 is opened or closed, thereby controlling the flow of diversion branch 33.

[0048] Specifically, when the temperature signal is higher than a preset value—that is, when the LNG temperature detected by the temperature detection device 41 is higher than a preset value—the control module 42 controls the control valve 331 to open, thereby opening the diverter branch 33. Once the diverter branch 33 is open, some of the heat exchange medium in the water inlet pipe 31 can flow through the diverter branch 33 to the water outlet pipe 32, thereby reducing the amount of heat exchange medium flowing from the water inlet pipe 31 into the vaporization chamber 11. This, in turn, reduces the total amount of heat exchanged by the heat exchange module 21. Consequently, the LNG receives less heat at the same flow rate, thereby lowering the LNG temperature.

[0049] When the temperature signal falls below a preset value—that is, when the LNG temperature detected by temperature detection device 41 falls below a preset value—control module 42 controls control valve 331 to close, thereby shutting off diversion branch 33. Once diversion branch 33 is shut off, the heat exchange medium in inlet pipe 31 flows into vaporization chamber 11, where it exchanges heat with heat exchange module 21. This raises the temperature of the LNG flowing through heat exchange module 21, thereby maintaining the LNG within a suitable temperature range.

[0050] It should be noted that after control valve 331 is opened, diverter branch 33 can divert a portion of the heat exchange medium in water inlet pipe 31 into water outlet pipe 32, where it flows back into the engine along water outlet pipe 32, thereby reducing the flow rate of heat exchange medium flowing through vaporization chamber 11 and, therefore, reducing the total amount of heat exchanged within vaporization chamber 11. When the flow rate of LNG flowing through heat exchange module 21 remains unchanged, as the amount of heat transferred to heat exchange module 21 decreases, the amount of heat received per unit of LNG also decreases, thereby controlling the temperature of the LNG as it exits heat exchange module 21. Therefore, in hot environments such as summer, when an LNG vehicle has been running for a long time and the engine water temperature is high, diverting water from water inlet pipe 31 via diverter branch 33 can effectively prevent the water temperature in vaporization chamber 11 from overheating and prevent excessively high LNG supply temperature from causing malfunctions such as torque limitation in the LNG vehicle.

[0051] See Figure 1 and Figure 2 The LNG vaporizer may also include a heating assembly 50. The heating assembly 50 is connected to the water inlet pipe 31, allowing it to heat the heat exchange medium. Specifically, the heating assembly 50 preheats the heat exchange medium in the water inlet pipe 31 before it flows into the vaporization chamber 11, ensuring that the heat exchange medium flows into the vaporization chamber 11 at a specific temperature.

[0052] In some other embodiments, the heating component 50 can also be arranged in the vaporization chamber 11, so that the heating component 50 can heat the heat exchange medium located in the vaporization chamber 11, thereby allowing the heat exchange medium located in the vaporization chamber 11 to quickly heat up, and heat the LNG through the heat exchange module 21, so that the LNG is heated to an appropriate temperature.

[0053] In addition, the heating component 50 can also be set inside the vaporization chamber 11 and directly attached to the heat exchange module 21, so that the heating component 50 can heat the heat exchange module 21, thereby exchanging heat with the LNG through the heat exchange module 21, so that the LNG is quickly heated to an appropriate temperature.

[0054] In this embodiment, the heating component 50 may be electrically connected to the control module 42 , so that the control module 42 can control the heating component 50 to be turned on or off through a temperature signal.

[0055] Specifically, when the temperature signal is lower than the preset value and the ambient temperature is too low, the control module 42 controls the heating component 50 to turn on and heat the heat exchange medium so that the heat exchange medium can heat up quickly, ensuring that the heat exchange medium has sufficient temperature and heat to exchange heat and heat the LNG through the heat exchange module 21, so that the LNG is heated to within the preset temperature range, avoiding the heat exchange medium temperature being too low and causing condensation of the heat exchange module 21, and preventing the LNG temperature after flowing through the LNG vaporizer from being too low and causing damage such as freezing and cracking to the engine into which the LNG flows.

[0056] When the temperature signal is higher than the preset value, the control module 42 controls the heating component 50 to shut down, so that the heating component 50 cannot continue to heat the heat exchange medium, thereby preventing the LNG temperature from being too high due to the excessive temperature of the heat exchange medium.

[0057] It should be noted that in low-temperature environments, such as in winter, at the initial stage of engine startup, the temperature of the engine's circulating water or heat exchange medium is low, making it impossible for the heat exchange medium to provide sufficient heat exchange for the heat exchange module 21 or LNG. Therefore, the heating component 50 is required to heat the heat exchange medium so that the heat exchange medium is heated to a specific temperature range to ensure that the temperature of the LNG flowing out of the heat exchange module 21 is within an appropriate temperature range. When the engine is operating normally, the temperature of the engine's circulating water or heat exchange medium reaches a specific temperature range, allowing the heat exchange medium to reach a specific temperature by absorbing the heat dissipated by the engine. At this time, the heating component 50 stops working to prevent the temperature of the heat exchange medium from being too high after the heating component 50 continues to heat.

[0058] As can be seen from the above, a vaporization chamber 11 is provided within the housing 10. The heat exchange module 21 is connected to the LNG pipeline 20, allowing LNG to flow through the heat exchange module 21. The heat exchange module 21 is also located within the vaporization chamber 11. The circulating water pipeline 30 includes an inlet pipeline 31, an outlet pipeline 32, and a diversion branch 33. The inlet pipeline 31 connects to the vaporization chamber 11 of the housing 10 to provide heat exchange medium to the vaporization chamber 11, allowing the heat exchange medium to penetrate the heat exchange module 21 and transfer heat to the heat exchange module 21, vaporizing the LNG flowing through the heat exchange module 21. The outlet pipeline 32 connects to the vaporization chamber 11 to guide the heat exchange medium out of the vaporization chamber 11 after heat exchange. One end of the diversion branch 33 connects to the inlet pipeline 31, and the connection is located upstream of the vaporization chamber 11. The other end of the diversion branch 33 connects to the outlet pipeline 32, and the connection is located downstream of the vaporization chamber 11. At the same time, the diversion branch 33 is connected to a control valve 331 to control the conduction or shutoff of the diversion branch 33, so that the heat exchange medium in the water inlet pipe 31 can flow directly into the water outlet pipe 32 through the diversion branch 33 to control the flow rate of the heat exchange medium into the vaporization chamber 11, thereby controlling the heat transferred by the heat exchange medium to the heat exchange module 21 and LNG, and further controlling the temperature of the LNG after vaporization.

[0059] While the present invention has been described with reference to several exemplary embodiments, it should be understood that the terms used are intended to be illustrative and exemplary rather than restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above-described embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope of the appended claims. All changes and modifications that fall within the scope of the claims or their equivalents are intended to be covered by the appended claims.

Claims

1. An LNG vaporizer connected to an LNG pipeline, characterized in that: The LNG vaporizer comprises: a box body, wherein a vaporization chamber is provided inside the box body; a heat exchange module connected to the LNG pipeline so that LNG flows through the heat exchange module; the heat exchange module is accommodated in the vaporization chamber; A circulating water pipeline is provided with a water inlet pipeline, a water outlet pipeline and a diversion branch. The water inlet pipeline is connected to the vaporization chamber to provide a heat exchange medium to the vaporization chamber, so that the heat exchange medium infiltrates the heat exchange module and transfers heat to the heat exchange module; the water outlet pipeline is connected to the vaporization chamber to guide the heat exchange medium out of the vaporization chamber; one end of the diversion branch is connected to the water inlet pipeline and is located upstream of the vaporization chamber, and the other end of the diversion branch is connected to the water outlet pipeline and is located downstream of the vaporization chamber; The diversion branch is connected to a control valve; the control valve is used to control the conduction or shutoff of the diversion branch to control the flow rate of the heat exchange medium flowing into the vaporization chamber.

2. The LNG vaporizer according to claim 1, characterized in that The system further includes a temperature detection device and a control module; the temperature detection device is connected to the LNG pipeline and is located downstream of the vaporization chamber to detect the temperature of the LNG flowing out of the vaporization chamber and generate a temperature signal; the control module is electrically connected to the temperature detection device and the control valve, and turns the control valve on or off according to the temperature signal; Wherein, when the temperature signal is higher than a preset value, the control module controls the control valve to be turned on, so that part of the heat exchange medium in the water inlet pipe can flow to the water outlet pipe through the diversion branch; When the temperature signal is lower than a preset value, the control module controls the control valve to be closed.

3. The LNG vaporizer according to claim 2, characterized in that It also includes a heating component; the heating component is connected to the water inlet pipeline to heat the heat exchange medium.

4. The LNG vaporizer according to claim 2, characterized in that It also includes a heating component; the heating component is arranged in the vaporization cavity to heat the heat exchange medium.

5. The LNG vaporizer according to claim 3 or 4, characterized in that: The heating component is electrically connected to the control module so that the control module can control the opening or closing of the heating component according to the temperature signal; Wherein, when the temperature signal is lower than a preset value, the control module controls the heating component to turn on and heat the heat exchange medium; When the temperature signal is higher than a preset value, the control module controls the heating component to shut down.

6. The LNG vaporizer according to claim 1, characterized in that The heat exchange module is configured as a metal coil, a metal fin tube or a metal wound tube.

7. The LNG vaporizer according to claim 1, characterized in that The control valve is configured as a solenoid valve.

8. The LNG vaporizer according to claim 1, characterized in that The control valve is configured as a regulating valve.

9. The LNG vaporizer according to claim 1, characterized in that: A drain port is provided at the bottom of the box body, and the drain port is connected to the vaporization cavity for discharging the medium in the vaporization cavity.

10. The LNG vaporizer according to claim 9, characterized in that: It also includes a threaded plug cover; the threaded plug cover is detachably connected to the drain outlet to seal the drain outlet.

11. An LNG vehicle, characterized in that: The LNG vehicle includes a vehicle body, a liquid storage tank, an LNG pipeline, a heat dissipation water tank and the LNG vaporizer according to any one of claims 1 to 10, the liquid storage tank, the LNG pipeline, the heat dissipation water tank and the LNG vaporizer are installed on the vehicle body, the LNG pipeline is connected to the liquid storage tank for transporting LNG, the LNG vaporizer is connected to the LNG pipeline to heat the LNG flowing through the LNG pipeline, the heat dissipation water tank is used to store a heat exchange medium, and the heat dissipation water tank is connected to the engine of the LNG vehicle so that the heat exchange medium dissipates heat to the engine, and the LNG vaporizer is connected to the heat dissipation water tank so that the heat exchange medium flows into the LNG vaporizer and releases heat to the LNG vaporizer.

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