Efficient energy-saving urea solution electromagnetic valve controlled by PTC (Positive Temperature Coefficient) resistor

Abstract

The utility model discloses a PTC (Positive Temperature Coefficient) resistance control efficient energy-saving urea solution electromagnetic valve which comprises a valve body, a PTC resistance plate is fixedly mounted at the top end of the valve body, a heated piece is fixed at the top end of the PTC resistance plate, a heat conduction strip is fixedly connected to the top end of the heated piece, a magnetic attraction piece is fixedly connected to the top end of the heat conduction strip, and a heating element is fixedly connected to the top end of the magnetic attraction piece. A through pipe is arranged at the bottom of the valve body, a pipe cavity is formed in the through pipe, a liquid inlet and a liquid outlet are formed in the two ends of the pipe cavity respectively, and a micro air pump is fixedly installed on the front face of the valve body. By arranging a series of structures, the urea solution remaining in the electromagnetic valve is reduced, the probability that the valve body is corroded due to the fact that the urea solution stays in the valve body for a long time is reduced, the adverse effect on the service life of the electromagnetic valve is reduced, unnecessary waste generated due to the fact that the urea solution is not vaporized is reduced, and the service life of the electromagnetic valve is prolonged. And the electromagnetic valve is more energy-saving in use.

Description

Technical Field

[0001] The utility model relates to the technical field of solenoid valves, in particular to a PTC resistor-controlled high-efficiency energy-saving urea solution solenoid valve. Background Art

[0002] The urea solution solenoid valve is one of the core components in the SCR system. Its main function is to control the injection amount of the urea nozzle to ensure the normal operation of the SCR system. At the same time, the urea solenoid valve is also an electromagnetically controlled valve, including components such as an electromagnet, a valve body and a valve core. The valve core can be opened and closed under the control of the electromagnet.

[0003] However, when the existing urea solution solenoid valve is in use, the urea solution needs to be pumped into the open solenoid valve by the action of the air pump. When the solenoid valve is closed, part of the urea solution that rushes out of the solenoid valve will immediately lose its momentum and remain in the solenoid valve. As the urea stays in the solenoid valve for a long time, the interior of the solenoid valve is more likely to be corroded by the residual urea, which affects the service life of the solenoid valve. In addition, when the existing urea solution solenoid valve is opened or closed, although a metering pump is used to control the flow rate, the volume of the injected urea solution cannot be controlled according to the temperature in the exhaust pipe. As a result, the volume of the urea solution entering the exhaust pipe is more likely to be unable to completely absorb heat and vaporize due to the low temperature in the exhaust pipe, resulting in unnecessary waste of urea solution due to failure to vaporize after being injected into the exhaust pipe, which is not energy-efficient. Utility Model Content

[0004] The purpose of the utility model is to provide a PTC resistor controlled high-efficiency energy-saving urea solution solenoid valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a PTC resistor-controlled high-efficiency and energy-saving urea solution solenoid valve, comprising a valve body, a PTC resistor plate fixedly mounted on the top of the valve body, a heat-receiving plate fixed on the top of the PTC resistor plate, a heat-receiving plate fixedly connected to the top of the heat-receiving plate, a heat-conducting strip fixedly connected to the top of the heat-conducting strip, a magnetic plate fixedly connected to the top of the heat-conducting strip, a through-tube provided at the bottom of the valve body, a lumen provided inside the through-tube, a liquid inlet and a liquid outlet provided at the two ends of the lumen, a micro air pump fixedly mounted on the front of the valve body, a connecting hose engaged with the output end of the micro air pump, an electromagnet fixedly mounted on the top inside the valve body, a valve stem provided at the bottom of the electromagnet, a valve core fixedly connected to the bottom end of the valve stem, a channel provided inside the valve stem and the valve core, and a plurality of air outlet holes provided on one side wall of the valve core.

[0006] Preferably, a controller is installed on one side wall of the valve body, the PTC resistor plate is electrically connected to the controller, and the micro air pump is electrically connected to the controller.

[0007] Preferably, the top end of the through pipe is penetrated by an external threaded barrel, the bottom end of the valve body is penetrated by an internal threaded barrel, the external threaded barrel is engaged with the internal threaded barrel by movable threads, and the valve body is engaged with the through pipe by movable threads through the external threaded barrel.

[0008] Preferably, the valve stem and the valve core are movably connected to the valve body and the through pipe through an internal threaded cylinder.

[0009] Preferably, both inner walls on both sides of the middle portion of the lumen are fixedly connected with partitions, and the valve core is slidably connected to the partitions.

[0010] Preferably, the end of the connecting hose is snap-connected to the top end of the channel, and the air outlet is communicated with the interior of the channel.

[0011] Preferably, the electromagnet is electrically connected to the controller.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] This PTC resistor-controlled high-efficiency and energy-saving urea solution solenoid valve uses a micro air pump, a connecting hose, a channel, and an air outlet hole opened on the valve core toward the liquid outlet of the solenoid valve. After the solenoid valve is closed, part of the urea solution that flows back into the valve body can be blown out again from the liquid outlet of the valve by blowing through the micro air pump connected to the solenoid valve control system, thereby reducing the urea solution remaining in the solenoid valve and the probability of the urea solution remaining in the valve body for a long time and causing corrosion to the valve body, thereby reducing the adverse effects on the service life of the solenoid valve.

[0014] This PTC resistor-controlled high-efficiency and energy-saving urea solution solenoid valve uses a magnetic sheet, a heat-conducting strip, a heat-receiving sheet, and a PTC resistor plate. In addition to being able to be controlled by a metering pump to control the volume of urea solution injected, the solenoid valve can also be auxiliary controlled by the PTC resistor plate by monitoring the exhaust pipe temperature. This allows the urea solution injected into the exhaust pipe to be fully vaporized and decomposed by the high temperature in the exhaust pipe, thereby reducing unnecessary waste of urea solution due to non-vaporization, making the solenoid valve more energy-efficient when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the through pipe and external threaded barrel of the utility model;

[0017] Figure 3 This is a schematic diagram of the valve stem and valve core structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the lumen and partition structure of the utility model;

[0019] Figure 5 This is a schematic diagram of the connecting hose and channel structure of the utility model.

[0020] In the figure: 1. Magnetic sheet; 2. Heat-conducting strip; 3. Heat-receiving sheet; 4. PTC resistor board; 5. Valve body; 6. Controller; 7. Micro air pump; 8. Through pipe; 9. Liquid outlet; 10. Liquid inlet; 11. Externally threaded barrel; 12. Internally threaded barrel; 13. Valve stem; 14. Valve core; 15. Air outlet; 16. Electromagnet; 17. Tube cavity; 18. Partition; 19. Connecting hose; 20. Channel. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc. should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0024] like Figures 1 to 5As shown, the PTC resistor controlled high-efficiency energy-saving urea solution solenoid valve of this embodiment includes a valve body 5, a PTC resistor plate 4 is fixedly mounted on the top of the valve body 5, and the PTC resistor plate 4 can send a signal to the controller when the set temperature is reached, so that the controller 6 energizes the electromagnet 16, thereby realizing the opening of the solenoid valve, so that the urea solution can be sprayed into a temperature environment that is conducive to the vaporization and decomposition of the urea solution. A heat receiving plate 3 is fixed on the top of the PTC resistor plate 4. The function of the heat receiving plate 3 is to conduct heat from the exhaust pipe to the exhaust pipe. To the PTC resistor plate 4, thereby realizing the function of the PTC resistor plate 4, the top of the heat-receiving plate 3 is fixedly connected with a heat-conducting strip 2, which is made of a metal insulating material with good thermal conductivity and can quickly conduct heat to the heat-receiving plate 3, and the top of the heat-conducting strip 2 is fixedly connected with a magnetic sheet 1. The function of the magnetic sheet 1 is to be adsorbed on the outer wall of the exhaust pipe so that the temperature of the exhaust pipe can be conducted to the heat-receiving plate 3 through the magnetic sheet 1. A through pipe 8 is provided at the bottom of the valve body 5. The through pipe 8 is a pipe for conveying urea solution. A lumen 17 is provided inside, and a liquid inlet 10 and a liquid outlet 9 are provided at both ends of the lumen 17. The inner walls of the liquid inlet 10 and the liquid outlet 9 are provided with threads, which are convenient for connecting with the pipeline for conveying urea solution. A micro air pump 7 is fixedly installed on the front of the valve body 5, and a connecting hose 19 is engaged with the output end of the micro air pump 7. The function of the connecting hose 19 is to enable the air outlet of the micro air pump 7 to be connected to the air outlet 15 on the valve core 14. An electromagnet 16 is fixedly installed on the top of the inner side of the valve body 5, and the bottom of the electromagnet 16 is provided with a There is a valve stem 13, the bottom end of the valve stem 13 is fixedly connected to the valve core 14, and a channel 20 is provided inside the valve stem 13 and the valve core 14. The function of the channel 20 is to allow the gas in the connecting pipe to flow to the air outlet 15. A plurality of air outlet holes 15 are provided on one side wall of the valve core 14. The air outlet holes 15 are oriented towards the liquid outlet 9, so that the urea solution remaining at the liquid outlet 9 can be quickly blown out from the liquid outlet 9, thereby reducing the residual urea solution in the valve body 5, and further reducing the probability of the urea solution corroding the inside of the valve body 5.

[0025] Specifically, a controller 6 is installed on one side wall of the valve body 5, the PTC resistor plate 4 is electrically connected to the controller 6, and the micro air pump 7 is electrically connected to the controller 6. The function of the controller 6 is to receive the signal from the PTC resistor plate 4 and then control the electromagnet 16, so that the electromagnet 16 can connect or disconnect the power supply, and then control the opening and closing of the solenoid valve.

[0026] Furthermore, an external threaded barrel 11 passes through the top end of the through pipe 8, and an internal threaded barrel 12 passes through the bottom end of the valve body 5. The external threaded barrel 11 and the internal threaded barrel 12 are movably threadedly engaged with each other, and the valve body 5 is movably threadedly engaged with the through pipe 8 through the external threaded barrel 11, so that the valve body 5 and the through pipe 8 can be disassembled, thereby facilitating the cleaning of the interior of the solenoid valve through pipe 8.

[0027] Furthermore, the valve stem 13 and the valve core 14 are movably connected to the valve body 5 and the through pipe 8 through the internal threaded tube 12. The valve stem 13 and the valve core 14 can move up and down in the through pipe 8 under the action of the electromagnet 16, thereby realizing the opening or closing of the solenoid valve.

[0028] Furthermore, partitions 18 are fixedly connected to the inner walls on both sides of the middle of the lumen 17, and the valve core 14 is slidably connected to the partitions 18. The function of the partitions 18 is to fill the gaps on both sides of the valve core 14 in the lumen 17, so that the solenoid valve can effectively control the flow of the urea solution.

[0029] Furthermore, the end of the connecting hose 19 is snap-connected with the top of the channel 20, and the air outlet 15 is communicated with the interior of the channel 20. The function of the connecting hose 19 is to allow the airflow blown out by the micro air pump 7 to smoothly enter the channel 20, and finally to blow the airflow out from the air outlet 15, thereby facilitating the blowing of the urea solution remaining at the liquid outlet 9 into the exhaust pipe.

[0030] Furthermore, the electromagnet 16 is electrically connected to the controller 6 , so that the solenoid valve can assist in controlling the flow of the urea solution via the PTC resistor in response to temperature changes, thereby reducing unnecessary waste of the urea solution due to incomplete vaporization and decomposition.

[0031] The method of using this embodiment is as follows: when using the PTC resistor to control the high-efficiency and energy-saving urea solution solenoid valve, it is necessary to first install the solenoid valve on the urea tank, and then connect the solenoid valve to the control circuit of the automobile exhaust system. Then, the magnetic sheet 1 can be adsorbed on the outer wall of the exhaust pipe by magnetic force, so that the temperature of the exhaust gas inside the exhaust pipe is transferred to the heat-conducting strip 2 and the heat-receiving sheet 3, so that the heat-receiving sheet 3 transfers the temperature to the PTC resistor plate 4. When the temperature of the PTC resistor plate 4 reaches the set temperature value, an electrical signal is sent to the controller 6, so that the controller 6 energizes the electromagnet 16, so that the electromagnet 16 generates magnetic force, and the valve stem 13 and the valve core are connected. 14 is adsorbed, so that the valve stem 13 drives the valve core 14 to move upward. At this time, the tube cavity 17 of the through pipe 8 will form a passage. The urea solution will enter the through pipe 8 from the liquid inlet 10 and flow to the metering pump from the liquid outlet 9. When the urea solution reaches the set flow value, the solenoid valve will be closed. At this time, the valve core 14 will move downward and fit with the partition 18 in the tube cavity 17. Then the micro air pump 7 will be started by the controller 6 and air will be introduced into the connecting hose 19, so that the air enters the channel 20 between the valve stem 13 and the valve core 14 through the connecting hose 19, and is blown out from the air outlet 15, so that the urea solution remaining at the liquid outlet 9 can be quickly blown into the exhaust pipe.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A PTC resistor controlled high efficiency energy saving urea solution solenoid valve, comprising a valve body (5), characterized in that: A PTC resistor plate (4) is fixedly mounted on the top of the valve body (5), a heat receiving plate (3) is fixedly mounted on the top of the PTC resistor plate (4), a heat conducting strip (2) is fixedly connected to the top of the heat receiving plate (3), a magnetic plate (1) is fixedly connected to the top of the heat conducting strip (2), a through pipe (8) is provided at the bottom of the valve body (5), a tube cavity (17) is provided inside the through pipe (8), a liquid inlet (10) and a liquid outlet (9) are respectively provided at the two ends of the tube cavity (17), A micro air pump (7) is fixedly mounted on the front of the valve body (5), and a connecting hose (19) is engaged with the output end of the micro air pump (7). An electromagnet (16) is fixedly mounted on the top of the inner side of the valve body (5), and a valve stem (13) is provided at the bottom of the electromagnet (16). The bottom end of the valve stem (13) is fixedly connected to a valve core (14), and a channel (20) is provided inside the valve stem (13) and the valve core (14), and a side wall of the valve core (14) is provided with a plurality of air outlet holes (15).

2. The PTC resistor controlled high efficiency and energy saving urea solution solenoid valve according to claim 1, characterized in that: A controller (6) is installed on one side wall of the valve body (5), the PTC resistor plate (4) is electrically connected to the controller (6), and the micro air pump (7) is electrically connected to the controller (6).

3. The PTC resistor controlled high efficiency and energy saving urea solution solenoid valve according to claim 1, characterized in that: The top end of the through pipe (8) is penetrated by an external threaded barrel (11), and the bottom end of the valve body (5) is penetrated by an internal threaded barrel (12). The external threaded barrel (11) and the internal threaded barrel (12) are engaged in a movable thread, and the valve body (5) is engaged in a movable thread with the through pipe (8) through the external threaded barrel (11).

4. The PTC resistor controlled high efficiency and energy saving urea solution solenoid valve according to claim 3, characterized in that: The valve stem (13) and the valve core (14) are movably connected to the valve body (5) and the through pipe (8) through the internal threaded cylinder (12).

5. The PTC resistor controlled high efficiency and energy saving urea solution solenoid valve according to claim 1, characterized in that: The inner walls on both sides of the middle portion of the tube cavity (17) are fixedly connected with partitions (18), and the valve core (14) is slidably connected to the partitions (18).

6. The PTC resistor controlled high efficiency and energy saving urea solution solenoid valve according to claim 1, characterized in that: The end of the connecting hose (19) is engaged and connected with the top end of the channel (20), and the air outlet (15) is communicated with the interior of the channel (20).

7. The PTC resistor controlled high efficiency and energy saving urea solution solenoid valve according to claim 2, characterized in that: The electromagnet (16) is electrically connected to the controller (6).

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